What is the working principle of the compressor and what are the common faults?

Compressor is a common, used in air and other gas processing equipment, but also the heart of the refrigeration system. According to the different scope of application, the household scenes of compressors are mostly refrigerators, food freezers, cold drinks cabinets, milk freezers, air conditioners, dehumidifiers, heat pumps and other electrical appliances; industrial application scenes are mostly factory buildings, rail transit industry, shipbuilding industry, etc. Compressors will encounter faults during use. If you want to solve the fault, you should first understand its working principle.

What is the working principle of a 1. compressor?

Compressor is the abbreviation of air compressor, which is a mechanical equipment used to provide compressed air. The working principle of the compressor is very simple. It uses the piston and connecting rod to complete the internal circulation of the cylinder, and compresses the air at the top to 400 times greater than the bottom pressure, so that the gas is compressed and the air is compressed.

From the perspective of the working principle of the compressor, the input gas enters the piston chamber of the piston, is compressed to a certain pressure, and then is output to the output chamber. At the same time, the direction of the air flow is changed from the change of the blades to realize the compression and output of the gas. In order to make better use of the piston and connecting rod in the cylinder to complete the cycle, the equipment is also equipped with a throat for expansion and contraction in the cylinder, the size and quantity of which can be adjusted according to requirements.

What is the common fault of 2. compressor?

Compressor common faults generally have the following situations:

1. Intake filter failure. Impurities cannot be filtered, resulting in fouling and blockage in the machine, reducing the exhaust volume. At the same time, the suction pipe is too long and the pipe diameter is too small, which increases the suction resistance and affects the air volume.

2. The cylinder, piston and piston ring are seriously worn. The wear of the parts will increase the gap, increase the leakage, and affect the displacement. At this time, the wearing parts, such as piston rings, need to be replaced. When replacing, professionals will adjust the appropriate clearance to increase the service life of the parts and improve the efficiency of the compressor.

3. The compressor speed is reduced to reduce the displacement. Because the displacement of the air compressor is designed according to a certain altitude, suction temperature, and humidity, when it is used on a plateau that exceeds the above standards, the suction pressure will decrease and the displacement will inevitably decrease.

4, stuffing box is not strict to produce air leakage to reduce the gas volume. The reason is that the stuffing box itself does not meet the requirements when it is manufactured. Secondly, it may be due to the poor docking of the piston rod and the stuffing box center during installation, resulting in wear, strain and other problems, resulting in air leakage. Generally, lubricating oil will be filled at the stuffing box to play the role of lubrication, sealing and cooling.

5. The influence of the failure of the compressor suction and exhaust valve on the exhaust volume. Metal fragments or other sundries fall between the valve seat and the valve plate, and the valve is not closed tightly, resulting in air leakage. This not only affects the exhaust volume, but also affects the change of pressure and temperature between the stage; the valve seat and the valve plate contact is not strict to form the leakage and affect the exhaust volume, one is the manufacturing quality problems, such as the valve plate warping, the second is due to the valve seat and valve plate wear serious and the formation of leakage.

6. The spring force of the air valve is not well matched with the gas force. If the elastic force is too strong, the valve plate will open slowly, and if the elastic force is too weak, the valve plate will not close in time. These not only affect the gas volume, but also affect the increase of power, as well as the life of the valve plate and spring. At the same time, it will also affect the gas pressure and temperature changes.

In actual operation, in addition to the above failures, the compressor will also have different failures due to changes in environmental factors such as temperature and humidity, as well as different human use conditions. In order to avoid frequent compressor failures leading to schedule delays and improve work efficiency, it is recommended to choose large-brand compressors, and the quality and after-sales service are more guaranteed.

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