Additional receiver for compressor. Air receiver for compressor

To increase the efficiency of working with compressed air, many compressor units use receivers - containers for storing air under pressure. Based on the intensity and volume of work, containers of 50, 100 liters, sometimes more, can be used. In this article we will look at how to make an additional receiver for a compressor with your own hands, why it is needed in general, and what characteristics should be taken into account when assembling it.

What is the receiver for?

The receiver is required for the compressor to perform the following functions:

• The receiver accumulates compressed air, which helps reduce vibrations in the system. This in turn reduces the load on the base and reduces the noise level from a permanent installation;
• Stabilizes the air pressure supplied directly to the work area. In this case, differences in pressure are inevitable, since the operation of any compressor involves the injection and suction phase of air;
• Air purification from condensate. IN otherwise due to increased pressure, air humidity would also increase, which would lead to corrosion of the steel surface of the compressor;
• Provides compressed air supply when connecting an additional consumer, as well as during interruptions in the operation of the compressor.

To obtain large volumes of compressed air, a standard receiver may not be enough. For example, for sandblasting large surfaces, instead of a more powerful compressor, purchase additional receiver.

In addition, an additional receiver makes it possible to use the compressor less often, thus reducing energy consumption!

From a design point of view, the receiver is a sealed tank in most cases with a capacity of 50-100 liters. In the case of stationary units, containers up to 500-1000 liters can be used. The device is equipped with condensate drains, air filters and shut-off valves for connection to the working device and the main unit that consumes compressed air, be it a spray gun, nozzle, etc.

The container for compressed air is made of steel - usually from steel 16GA2F or 10HSND, which is resistant to corrosion. However, in the case of low-power compressors, plastic receivers, and even those made of high-strength rubber, can be used.

Paired with the installation, receivers can be equipped both vertically and horizontally. The first is in most cases used in stationary units, the second - in mobile ones. Each type offers its own pros and cons. For example, horizontal receivers require a shorter pipeline because they are more compact, but vertical ones are much easier to drain condensate.

Deciding on the parameters

In addition to capacity, the compressor receiver can be characterized by the following parameters:

1. Requirements for the location (within air contaminated with mechanical particles, for example, near circular saws, away from explosive, flammable materials and heat sources).
2. Working conditions (relative air humidity should not be more than 75-80 percent, temperature around 15-40 degrees).
3. Maximum air humidity levels .

According to the requirements of PB 03-576-03, it is prohibited to use receivers that have defects on the surface, such as corrosion, dents and cracks, as well as those that have not passed the performance test of the container walls.

The characteristics of the receiver for the compressor are selected as follows. The first step is to determine the maximum and minimum pressure values, the duration of operation and the required compressed air consumption. The next step is to find the required data using a table with online calculations, which can be easily found on the Internet upon request. For example, in the case of a maximum/minimum pressure drop of 4/3 atm, a maximum load duration of 5 minutes and an air flow rate of 0.1 m 3 /min, the optimal volume of the receiver tank will be 500 liters.

This method focuses on the time during which the receiver will be completely empty. However, there is a simpler tabular method that allows you to correlate the power consumption of the compressor with the volume of the receiver. Among them, it is worth highlighting the most commonly used ratios:

• Up to 550 liters for compressors up to 20 kW;
• Up to 300 liters for 10 kW models;
• And up to 100 liters for 5 kW products.

If necessary, intermediate values ​​can be calculated by interpolation. There are also experimental dependencies. According to one of them, the capacity of the receiver tank should not be less than the compressor capacity for 8 seconds permanent job. In this case, the volume of the tank at an air flow rate of 400 l/min can be calculated as follows:

V = (400*8)/60=53.33 l

Rounded to big side we get 54 liters.

Do-it-yourself additional receiver for a compressor

Some work in a workshop or at home may require increased consumption of compressed air, which household compressors are not capable of providing. One of possible solutions will place an additional receiver for the compressor. The cost of such a device, based on volume, will be 12-15 thousand rubles if you buy it in a store, but nothing prevents you from saving money and making the receiver yourself. An additional advantage The second solution is also supported by the fact that most of the models offered in the store are designed for standard compressors, which is why their price is so high!

The connection of the additional receiver is usually carried out in series with the main one, and therefore, depending on the required volume, a regular fire extinguisher body or a cylinder left over from liquefied gas may be suitable for operation.

As in the case with, making a homemade receiver begins with thoroughly cleaning the cylinder from gas residues. For this purpose, the first step is to remove the input valve. It is important to note that removing the valve cannot be used with power tools, as there may be gas residues inside!

After this, the bottle is filled with water for a day. Next, threaded plugs with gaskets are screwed into the container or tubular splitters for hoses are welded. At the end, the balloon should be treated weatherproof paint!

You can install a condensate drain at the bottom of the container; it would also be useful to have a pressure gauge or pressure switch on the receiver. In the case of a condensate drain, its size should be selected based on the dimensions of the connecting thread, operating pressure and compressor performance. The average cost of condensate traps is around 2.5-3 thousand rubles.

Below in the photo you can see the finished additional receiver for the compressor, placed on top of a tripod welded from a steel rod.

When working with homemade device The following points should be taken into account:

• As the pressure decreases, the operating time will have to be reduced from the usual 75-80 percent to 50-60. For lower values, it is not practical to use a self-assembled element;
• Before putting a full load on the compressor electric motor, you should first check the possibility of its operation in tandem with an additional receiver! For this purpose, the compressor drive is started at idle, after which, during prolonged operation (more than 20 minutes), the pressure difference is measured with a flow meter. In this case, the additional receiver is suitable for operation if the pressure during testing does not fall below the minimum value;
• In the case of an additional tank, the installation of a condensate drain is considered mandatory.

Well, now you know what a receiver is for, what it is, what characteristics it has, and also how to install an additional cylinder to the main tank. We hope the tips presented will be useful to you. Good luck!

The compressor is a rather complex engineering structure, which includes many components and assemblies, including such as a receiver. This is the name of the vessel in which the compressed gas produced during the operation of the compressor is stored.

Why do you need a receiver in a compressor?

The receiver included in the supercharger provides a solution to several complex problems, in particular:

1. Guarantees stable pressure working environment transported to consumers.
2. Provides gas transportation at a time when the compressor begins to operate intermittently, or an additional consumer is connected to the air supply system.
3. Cleaning the compressed air mixture from accumulated moisture.
4. The accumulation of gas in this container leads to a decrease in vibrations in the compressor. This in turn reduces the level of force loads affecting the foundation.
5. To perform work that involves production large quantity gas is standard, the installed vessel may not be enough, then instead of purchasing and installing a stronger compressor, an additional capacity is installed on the old compressor.
6. The receiver ensures that the compressor is turned on at a certain frequency, and this leads to a decrease in electrical energy consumption.

In essence, a compressor receiver is a container of a certain size. For mobile compressors, containers with a volume of 50 to 100 liters are used. For stationary units, receivers with a volume of up to 1000 liters are used.

Filters are installed on them, which purify the gas from moisture; in addition, the design of the receiver includes condensate drains and shut-off valves. It is used to connect the compressor to consumers.

For the manufacture of receivers, corrosion-resistant steels 10HSND or 16GA2F are used, meanwhile, in rare cases, polymers or high-strength elastomers are used for low-power units.

Manufacturers produce two types of containers - horizontal and vertical. The first version is used for mobile type compressors, the second version is used for stationary compressors.

Each of the versions has its own advantages and disadvantages. For example, in a vertical design it is easier to drain water, while horizontal ones are more compact in size and require shorter pipelines.

How to choose the optimal receiver parameters

Like any technical product, the receiver has a number of technical parameters. Among them are:

1. Volume, l.
2. Humidity.
3. Operating parameters, that is, limit values ​​of humidity and temperature.
4. Characteristics of the installation location of the compressor unit. It must be installed away from sources of heat, fire and explosive substances. The presence of foreign particles in the air is undesirable, for example, in procurement areas.

Safety rules state that it is unacceptable to use receivers that have not passed the appropriate test, on the surface of which there are mechanical damage in the form of cracks and traces of corrosion.

The selection of a receiver is carried out on the basis of a fairly simple calculation:

1. The required flow rate of the air mixture, the duration of the flow rate, and the maximum operating pressure are determined.
2. Using special calculation tables, they exist both in paper form and as Internet applications. For example, with a productivity of 0.1 cubic meters per minute, a maximum load duration of 5 minutes and within a pressure range of 3/4 (min/max), the volume of the receiver will be about 500 liters.

This method of calculation is focused on the time required to completely empty the container.

There is another technique based on the ratio of the volume of the vessel and the power of the air compressor. In practice, the following ratios are used:

1. Power 5 kW, volume max – 100 l.
2. Power 10 kW, volume max – 300 l.
3. Power 20 kW, volume max - 550 l.

There are also experimental dependencies, for example, the volume of the receiver cannot be less than the amount of air that the compressor can produce for 8 seconds of operation. For example, the flow rate is 400 liters per minute, respectively, the volume of the poppy must be at least 53 liters.

Do-it-yourself additional receiver for a compressor

Some work performed in a home workshop or garage requires compressed air. And a situation may arise when a household compressor cannot cope with the task. In this case, the situation can be resolved by installing an auxiliary receiver on the existing unit. This device can either be purchased at a specialized store, for example, car spare parts. There you can buy a receiver for the KAMAZ pneumatic system, or make it yourself.

Most of the receivers offered are made for a specific model and differ at a high price. Depending on the planned size of the container for self-made, you can use either a propane tank or a fire extinguisher body.

The procedure for making a homemade receiver

The sequence of manufacturing an additional vessel looks approximately as follows.

1. Cleaning an old vessel from gas residues. To do this, you will need to clean it of gas residues. The inlet valve is removed, while using an electric tool, for example, an angle grinder, gas residues may remain in the housing.
2. The vessel is filled with water and allowed to stand for 24 hours. Then it is drained and the internal cavity is cleaned of dirt.
3. After this, splitters under the sleeves are welded into the cylinder, but it is also permissible to install threaded fittings; to increase the tightness when installing plugs, it is necessary to install sealing gaskets.
4. A homemade receiver must be painted with weather-resistant paint.
5. A condensate drain is installed in the assembled and painted maneuver - its place is at the lowest point of the tank, and a pressure gauge is installed in the upper part. The brand of condensate drain must be consistent with the compressor capacity and thread sizes. The cost of such a device ranges from 2500 to 3000 rubles.

When operating a condensate trap, we must not forget that its installation on an auxiliary gas storage tank is mandatory. Before switching on the operating load, it is necessary to check the condition of the electric drive to ensure that it can be operated with an auxiliary gas container.

To do this check, you need to turn on the compressor and use a flow meter to check the pressure surge during long-term operation (about 20 minutes).

If the minimum pressure corresponds to the declared characteristics of the supercharger, then operation assembled structure quite acceptable. If the pressure drop is below the permissible level, then the use of this equipment is in question and it is undesirable to use it.

The use of an air receiver serves several key purposes

Using a compressed air storage vessel allows the compressed air to be stored in the air supply system. Improve the quality of the supplied air mixture; when passing through this container, the air flow is dried, foreign particles settle down and do not enter the pneumatic line. In general, the use of a receiver leads to an extension of the operating life of the compressor.

Advantages of horizontal receivers

The obvious advantages of horizontal containers include stability. This type of construction provides high resistance to vibration and other external influences. On the other hand, a horizontal layout requires more area to accommodate the compressor.

Advantages of vertical receivers

The use of vertical containers for storing compressed air makes it easier to install the device in a specific location and saves space. This is especially true in the case of constructing a series or parallel connection of containers.

Manufacturers present to consumers a wide range of the lineup vertical air storage devices

Capable of operating only from receivers. These devices are responsible for the pressure inside the system. Many modifications are made with relays that differ in clamping force. It should also be noted that receivers can be equipped with sensors. Filters are most often used with clamps. If necessary, you can make a receiver for the compressor yourself. However, it is important to consider the type and capacity of the compressor unit.

40 liter devices

Making a receiver for 40 liters is quite simple. First of all, a camera for the device is prepared. Typically, stainless steel sheet is used. Experts say that the lid should be welded last. It should also be noted that there are two-chamber modifications. The easiest way is to use a low conductivity relay. Homemade modifications, as a rule, are not equipped with sensors. Gearboxes for devices are selected of the chain type. In this case, valves with a tee are used to purge air.

60 liter modifications

An additional receiver for a 60-liter compressor can be made with two chambers. Experts say that the sheet of metal should be at least 1.3 mm thick. Tees are most often installed next to the relay. Receivers of this type must be equipped with two filters. In this case, the gearbox should be installed with an adapter. 60 liter modifications are great for low power compressors. The maximum pressure indicator for systems is 6 bar. It is also important to note that only the duct valve should be used during assembly.

80 liter device

Air receivers for an 80-liter compressor can be made with two relays. Experts say that filters are selected with a large diameter. The outlet pipe of the receiver should be in the upper part. Intermediate filters are mounted via an adapter. It should also be noted that modifications with stops located inside the chamber are considered common. The pressure parameter for receivers of this type is approximately 10 bar. They use wired relays. The maximum compression force is 3 N. Tees for modifications are selected with a diameter of 2.2 cm. It should also be noted that sensors are often installed in devices to monitor pressure levels.

Single Valve Models

How to make a receiver for a compressor with one valve? In this case, the housings are used for 30 liters. You can also consider more compact modifications. To assemble the receiver, the camera is first prepared. The hole for the gearbox is welded to a small diameter. Experts recommend using only wired relays with a tee. The diameter of the outlet pipe for a 30-liter modification should not exceed 2 cm. The check valve is mounted at the base of the filter. It should also be noted that modifications with two outputs are considered common. They are great for 10 kW compressors. In this case, the pressure in the system can be maintained at 5 bar.

Two valve device

The receiver for a compressor with two valves is assembled with a capacity of 40 liters or more. On average, the pressure for models of this type is 4 bar. The devices differ primarily in relay conductivity. Their maximum clamping force is 7 N. Many modifications are made with a contact gearbox with two outputs. If you are assembling a simple modification, then it is more advisable to use a tee without a sensor. It is also important to note that a check valve should always be installed behind the filter. Experts say that the outlet pipe is welded last.

Single chamber devices

The single-chamber modification is suitable for compressor units of different capacities. Devices of this type are actively used in large factories. Modern models stand out high parameter pressure. They use a safety valve and have a protected gearbox. To assemble a single-chamber receiver yourself, it is recommended to make a container for it. The relay is used with conductivity from 1.2 microns. In this case, the downforce must be a maximum of 12 N.

Check valves are installed behind the filter. The gearbox should be located in the rear part of the tank. The optimal diameter of the outlet pipe is 2.2 cm. However, it is important to consider the volume of the chamber. If you assemble a 40-liter device, then the intermediate filter is installed behind the relay. It should also be noted that before using the equipment, the chamber must be checked for sealing.

Two-chamber modifications

A two-chamber homemade compressor receiver is made with a 60-liter tank. Some devices are made with a sensor. To assemble the model yourself, you will need to make a camera and also make a hole for the pipe. The relay is usually used as a wired type. It is more advisable to use adapters with wraps. Experts say that the receiver must withstand high pressure. The optimal diameter of the outlet pipe is 2.2 cm. Valves for devices are selected from steel or aluminum alloy.

Using gearboxes with interlocks

It is difficult to assemble a receiver for a compressor with blockers. First of all, it is important to note that the models must have a high permissible pressure parameter. Device filters only fit on pads. It should also be noted that the relay must be installed in front of the gearbox. Experts say that receivers of this type are produced with small tees. Some modifications are assembled with carriers. Sensors are used to normalize the pressure inside the chamber. Check valves are installed with baffles. They are able to pass air only in one direction.

Devices with pressure sensors

The compressor receiver is produced with cylinders of different capacities. Some devices are suitable for powerful compressor installations. However, in this case, much depends on the diameter of the pipe. If we consider models with one outlet, then their permissible pressure indicator is on average 5 bar. In this case, the downforce can reach a maximum of 12 N.

Check valves can be installed with or without pads. Gearboxes can be found in different conductivities. Tees on receivers are installed with a diameter of 2.4 cm. If we consider simple modifications, then they use only one filter. The permissible pressure indicator for receivers of this type is about 2 bar. They are suitable for compressors with a total power of 8 kW and above.

Good afternoon In this article, using the example of my own compressor assembly, I want to show the method of building compressors from available parts for model airbrushing.

Main elements

The first step is to formalize the technical requirements for our product of goblin engineering.
Since I purchased a new dual action airbrush, I needed a compressor with a receiver. The fact is that, unlike a single action airbrush, the new airbrush is able to control the air flow, lock it, and open the air duct. In European countries, many people use such an airbrush together with a separate compressed air cylinder, disposable or reusable; let’s leave the economic side of this aside. Air container - receiver- allows you to collect air like a cylinder. If air is continuously pumped into the air duct hose, then at some point the fitting may fail and the hose will fly out. Getting hit by a flying hose on any part of the body is extremely painful and unpleasant. And so - the airbrush uses air from a cylinder. So, a double-action airbrush involves the use of a receiver. We will return to it later.

The main thing is, in fact, yourself compressor. We will use a compressor from a refrigerator. Like a “pot” - because you can no longer find compressors of the “cylinder” type during the day, and they are all old. We decide on the choice of compressor using various sites selling refrigeration equipment. Probably the main criterion will be their price, since their air injection parameters are approximately equal. Some are stronger, some are weaker. Upon purchase, you can go to the store yourself, you can order delivery if they do not have a retail store and only work on the Internet. Before ordering, we look at the compressor model and write down the name of the company that produces it, using ctrl+c, or on a piece of paper. And we go to the manufacturer’s website. The manufacturer of the compressor that I found is Danfoss, on their website you can download a pdf file from technical description compressor. Be sure to download it, we will need it!

Let's return to the receiver. The receiver should be a container designed to contain gases or liquids under high pressure. It is desirable that it meets the requirements of GOST. Let me make a reservation right away - a plastic bottle, plastic tanks, tanks and canisters do NOT belong to such things. Their use is a blatant violation of safety regulations! Let's consider the containers:

Option one- carbon dioxide fire extinguisher. A good option, tested, holds up to 10 atm. Very wide selection of capacities - 3,5,10 l. - it’s easy enough to get (you can buy it, you can get it “exhausted”). However, it has one significant drawback - a metric thread at the inlet. That's what I used.

Option two- hydraulic accumulator. A decent selection of containers, but has a low operating pressure. The inlet has a convenient 1 inch thread. It requires fine-tuning before use, since the inside is divided into a membrane containing carbon dioxide, which holds water under pressure. She needs to be pulled out. To get it, simply buy it at a construction hypermarket or construction market.

Option three- oxygen balloon. Some samples can hold a huge number of atmospheres, however, either cylinders with an extremely small capacity or heavy, massive ones for welding work are available, and it is extremely difficult to get other options. But if you get some of the medical equipment (I'm afraid it's very expensive ), you can arrange an oxygen bar before assembly!!! =)))

Option four- cylinders for various gases (propane, etc.) - easy to get, otherwise similar to a fire extinguisher. However, it is written on them that use for compressed air is not recommended.

Connecting links between the gearbox and the receiver, air preparation unit

Now that the compressor and what will be the receiver have been determined, it is necessary to think about how they will be connected, and how the compressed air will flow to the airbrush.
The first is the unit that is attached directly to the receiver and ensures air distribution between the lines (it is necessary to mention that one of its main characteristics is compatibility with the connector on the receiver; I will mention screwing methods later).
The second is a pressure switch. The pressure switch must ensure that the compressor turns off when a certain pressure in the receiver is reached, and turns it on when the pressure drops to a minimum value. As a pressure switch - best option- relay RDM-5 for water supply systems. It is very easy to find and is sold in most plumbing supply stores. Please note that the RDM-5 connecting element is designed for 1-inch external thread.

Third, an indication of the pressure in the receiver is necessary. We buy a pressure gauge with a measurement limit of 10 atm. These have connection size 1. Important - you need a static device.

Fourth is the air preparation unit. A certain pressure must be applied to the hose leading to the airbrush. Therefore, a gearbox is needed. The reducer must have a pressure control limit from zero to 8-10 atmospheres. It is also necessary that a pressure gauge be attached to it in order to see the value of the regulated pressure, as well as an oil separator filter. Because even from the receiver, particles of compressor oil can fly. Attention - do not buy a lubricator filter under any circumstances - it performs a diametrically opposite function.

Fifth - Consumables, fittings, turns, tees. The main size of fittings is 1 inch; in order to calculate their number, it is necessary to draw a diagram of the air distribution and preparation unit. In addition to them, we will need several adapters from 1 to 1 inches, external and internal.
Having looked at all the parts and components, we’ll make a drawing of how it will all look assembled, for example, like this:

Now let's think about the placement of the entire structure. As an option - ordinary chipboards. In order to avoid dragging the entire structure around the apartment and workshop, we will provide roller legs, which are easy to find in any furniture store. To avoid the installation taking up a lot of space, I decided to place everything on two floors. To make it easier to work in the future, let’s draw the following diagram:

You will need either very long M8 bolts or short studs. As well as nuts and washers.
Now, to summarize the planning stage, let's write a list of required materials.

• Compressor - 1 pc.
• Receiver (fire extinguisher) 1 pc.
• Pressure switch - 1 pc.
• Pressure gauge - 1 pc.
• Filter reducer - 1 piece.
• Emergency valve - 1 piece.
• Fittings, adapters - based on the selected scheme
• Various plumbing gaskets, fum tape, sealant.
• Cables, switch, plug + various small items for laying and connecting them.
• A flexible hose (preferably oil-resistant), with a diameter that matches the outer diameter of the air outlet fitting of the compressor.
• Chipboard board for the stand, 4 roller legs, 4 M8x25 bolts or M8 studs, nuts, washers and other small hardware, as well as various tools.

Let's start assembling!

Compressor assembly

So, the shopping run is over, the diagram has been drawn, let's start the show =). The first difficulty I encountered was the assembly at the fire extinguisher outlet. There are several options here - dismantle the assembly and find a welder to weld the required adapter fitting. Due to my haste, I didn’t want to look for someone, so I did a simple thing - I unscrewed part of the valve (leaving the internal mechanics and removing the control element). An adapter with a 1-inch internal thread was fitted to one of the outputs, and an adapter from 1 to 38 was screwed into the other with a creak. Hand on heart, this (and, in fact, like the entire receiver) was made in violation of the rules for the operation of pressure vessels. It’s better to weld the new adapter with high quality (which, of course, is also not entirely according to the rules...).

The first stage of assembling the compressor is simple - we arm ourselves with a plumbing adjustable wrench, fum tape, sealant (attention, it subsequently hardens - if you want to make it for centuries - do not regret it!), and twist the adapters according to the plan outlined in advance. An important note - in order to ensure a tight connection, it is not necessary to tighten everything “to the point of creaking” - according to the law of meanness - the tees and turns will never be at the desired angle. We install a reducer, a pressure gauge, a pressure switch, and an adapter for a flexible hose. Each stage of the process must certainly be accompanied by fitting to the fire extinguisher receiver.

Carpenter versus joiner

“The viper with wheels is here!”
KF "Kin-dza-dza"

The second stage of assembly is carpentry. I took ready-made chipboard plates “from stock” and screwed furniture wheels onto them with self-tapping screws, having previously drilled the seats for them with a thin drill (this way they are screwed exactly in place and much easier). Be sure to ride the newly made product around the apartment (you need to check it out! =)) - you will be guaranteed the attention and interested reaction of your family (from the category of bad advice, it would be worth leaving a note “never repeat this yourself”). Since I was making a two-level stand, the next step was to mark and drill holes for the studs. I screwed the nuts approximately to the middle of each stud, measured out the perforated tape with a reserve (so that it would be a “bed” for the fire extinguisher) and hoisted the latter to the place intended for it.
Attention!!! Be sure to cover all bitten off areas of the punched paper tape with electrical tape or other soft material to avoid the possibility of injury, or treat it so that there are no sharp edges or burrs left.

After positioning the fire extinguisher, I placed two more perforated tapes on top and secured them with nuts.
If you use a prepared hydraulic accumulator as a receiver, then most small (5, 6, 8 liters) “horizontal” type models have wonderful claw brackets at the bottom and top. The lower ones can be screwed to the base, and a compressor can be placed on the upper ones.

In my case, which I use as an example, the structure consists of two levels. The “second floor” of the structure must be prepared before installation. We find suitable holes on the legs of the compressor (there are many of them), and, maintaining the geometry, mark and drill them on the “second floor”. It’s okay if the holes are slightly larger than the diameter of the bolts (I used M8), wherever needed I used wide washers. We mount the “second floor” plate, looking at the diagram that we talked about in the first part.
We install the compressor. In order to reduce vibration, it is necessary to provide some damping elements. I used ordinary plumbing silicone gaskets as them, making a kind of shock absorber out of them. We fix the compressor, do not forget to put washers.

We try on the air distribution module to the receiver. If something sticks out, or is simply poorly positioned, the design can be changed. After fitting, we screw it on. Using a flexible hose, fum tape and clamps, we connect the outlet of the compressor and the inlet of the air preparation unit. The clamps must be tightened well, ensuring a tight fit of the hose - otherwise oil may leak and splash on the compressor side, and air may leak from the air distribution module side.

I sing the electric body. The finishing touches and...

“Mahmoud, set it on fire!”
KF "White Sun of the Desert"

First, a little theory about the motor used by the compressor. The compressor we are considering as an example uses a single-phase asynchronous machine as a drive. Therefore, to run it, you need different auxiliary devices. In our case, this is a starting winding with a capacitor. Carefully read the instructions for the compressor! The types of devices that provide drive starting can vary greatly between different models.
Now the most important thing is that you need to work with the installation’s connection diagram. There are several pitfalls here:

1. The compressor is taken out of the usual connection diagram. For it to work, you need to install a jumper.
2. It is advisable to provide protective elements (circuit breaker) - the issue is controversial; in principle, in case of any excesses, the circuit breaker should operate on the group of sockets to which the compressor is connected - installing another circuit breaker, in my opinion, is not necessary.
3. The connection line must go through the relay and switch.
4. Sometimes, it is necessary to connect a capacitor to the compressor. It depends on its type. Be sure to check the specifications and manual for the compressor you are using.

The connection must be made according to the following scheme:

From the plug we lead the phase wire (L) to the switch. Next, connect the phase wire to the desired relay terminal. The neutral wire (N) remains intact, if there is a ground wire, but if there is no ground wire, we connect the neutral wire to the ground terminal of the relay (a protective ground is obtained), from the relay we lead the phase and neutral wires to the compressor drive starting device (the box is like this it on the body), and according to the diagram we connect it to the corresponding terminals. It turns out something like this:

General form connection diagrams. Connection diagram for relay RDM-5. Please note - we use terminal L1 to connect the phase, as well as the corresponding terminal on the top block - from it the wire will go to the compressor. L2 is not used! Also, under no circumstances connect the pads to each other - then the relay will not work.

From a regular plug (2.5 mm2 cable), through the switch, to the pressure switch (it is marked there where to connect what) and to the compressor. The cable at the plug can be of two types - with ground, phase and neutral, if your house is new, or simply with phase and neutral, if the house is old. In principle, you can stop worrying and connect the ground to the neutral conductor, as is done in old houses.
So, now for the system to work, we’ll install a jumper. It is installed directly on the terminal block of the starter. It is best to connect by soldering, but you can use crimp contacts of a suitable type (they are indicated in the description of the compressor). The jumper is shown in blue:

Jumper connection diagram in the starter.
This jumper is very important, as it ensures the connection of the windings to the phase.
At the end, carefully lay the cables using plastic ties and self-adhesive pads for them. Carefully inspect the cables for insulation integrity, and also check each connection for mechanical strength. Check carefully for possible short circuits - each wire must be carefully stripped and have contact only with the terminal intended for it.

Now we check everything, launch it, and start painting the models! =)

In contact with

Most compressor stations, in addition to a machine that compresses gas to the required pressure, also include a metal container called a receiver. Often its size significantly exceeds the accompanying equipment. In this article you will find an explanation of why you need a receiver for a compressor, and by what parameters it is selected for a specific installation.

The purpose of the air container is directly related to the physical properties of compressed gases. The faster they lose pressure in the event of a flow, the smaller the volume they occupy. A receiver is needed in the compressor to perform the following functions:

• creating the necessary supply of air to supply the consumer without turning on the engine or in case of its unexpected stop;
• smoothing out pressure fluctuations, especially characteristic of piston machines;
• ensuring the convenience of regulating the output parameters of the gas coming from the compressor unit;
• reducing vibration, noise, peak load levels;
• collecting moisture and small mechanical inclusions contained in the gas.

Important! Often, the use of large air collectors saves energy consumption due to the rational operation of the electric motor.

The compressor tank is traditionally made made of corrosion-resistant steel. It is also possible to use certain types of plastic and high-strength rubber for small volumes and pressures. Receivers for mobile installations can reach 100 liters. The dimensions of stationary equipment are not limited by anything and are often measured in several cubic meters.

To fill the cylinder and flow air from it, one fitting is enough, but models with a separate gas inlet and outlet work better. In order to control pressure, some manufacturers additionally provide installation of a pressure gauge. For large containers this requirement is mandatory. For their inspection and cleaning, hatches are welded in.

The spatial arrangement of the receiver is selected depending on the convenience of the equipment layout horizontal or vertical. The first option gives greater stability to mobile units. The second provides better condensate separation and requires less installation space.

Receiver selection

The technical requirements for compressor receivers are quite stringent. As high-pressure equipment, they may pose a potential hazard. The most important characteristics, which determine the permitted parameters for using the tank, are considered to be:

• operating pressure;
• temperature range;
• indicators of relative air humidity.

The rules for the design and safe operation of pressure vessels regulate the volume, frequency and method of their control tests for density and strength. They must be sealed, without visible defects and traces of external or internal corrosion.

From a technological point of view, an air compressor with a receiver is needed to ensure the operation of certain pneumatic equipment. What is important here is the required gas flow with the required pressure. This takes into account the operating mode with probable peak loads. All these indicators determine minimum receiver volume, capable of providing a stable air supply.

How to choose a receiver for a compressor that you already have? Take advantage special tables or calculation calculators.

On a note! Simplified methods are based on averaged experimental data. It is believed that the cylinder for a compressor cannot be less than the volume of gas produced by it in 8 seconds of operation at normal loads.

An alternative option for choosing capacitive equipment based on compressor power. It gives the simplest dependency:

• 5 kW – up to 100 l;
• 10 kW – up to 300 l;
• 20 kW – up to 550 l.

All other values ​​are obtained by interpolation.

Making and connecting an additional receiver with your own hands

It is not uncommon for a small workshop to need to accommodate new pneumatic equipment that the old air blower can no longer handle. You can try to solve this problem yourself if connect an additional receiver to the compressor. At the same time, it is not at all necessary to incur unjustified expenses when purchasing a standard container. Experienced craftsmen try to make do with improvised means.

In almost any household, old equipment designed to work under pressure often lies idle. You can make a receiver for a compressor with your own hands from a gas cylinder, a fire extinguisher or a piece of large-diameter seamless thick-walled pipe.

The most reliable is a homemade receiver made from a liquefied petroleum gas cylinder. To do this, the inlet valve is dismantled, after which it is intensively washed or steamed. inner space. It is advisable to fill the container with water and allow the bottom sediments to dissolve in it for 24 hours. Only after this can gas cutting and welding be carried out on the body if necessary.

Fittings for connecting a pressure gauge, air inlet and outlet, and a drain valve for condensate removal are welded into the cylinder.

Advice! It is convenient to adapt handles and wheels for mobile installations or a stable support in case of stationary applications.

The connection to the compressor is made using metal pipes or hoses designed for high pressure. Assembled installation Necessarily tested at maximum load, after which the optimal mode is selected for various situations.

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