1. Components of air compressor:

Screw air compressors can be broken down into the following systems:

Main engine/motor system

Cooling/separation system

Air circuit/regulating system

Control/electrical systems

Protection system

Screw compressor structure:

Water pipe system: gas cooler, oil cooler.

Gas pipe system: compressor, air filter, load reduction valve, check valve, oil and gas separator, minimum pressure valve, air cooler, liquid gas separator, safety valve.

Pipeline system: compressor, oil and gas separator, oil cooler, oil cut-off valve, oil filter.

Regulating system: pressure controller, pressure regulator, solenoid valve.

Working principle and characteristics of air compressor

1. High speed and small volume: 3000~20000r/min

2. Forced gas transmission characteristics: the exhaust volume does not change with the exhaust pressure, and the exhaust volume is reduced or increased by about 1% for each increase or decrease in exhaust pressure of 0.1MPa.

3. Small gas pulsation, small vibration, simple structure.

Working principle of air compressor

The working process of the host can be divided into three stages:

Suction stage → compression stage → exhaust stage.

Screw compressor is a kind of two-axis positive displacement back transition compressor, the air inlet is opened at the upper end of the housing, the exhaust port is opened at the lower end, two high-precision main and secondary rotors, horizontal and parallel mounted inside the housing. The main and secondary rotors are helical shaped teeth, around the outer edge of the rotor, the main and secondary rotor teeth mesh with each other, the two rotors are supported by bearings, the motor and the main body are combined together, after a set of high-precision growth gear to increase the speed of the main rotor, the air is compressed by the movement of the main and secondary rotors.

The common failure and cause analysis of air compressor

1. Compressor does not load:

A. The pressure on the gas pipe exceeds the rated load pressure, and the pressure regulator is disconnected

b, solenoid valve failure

C. There is leakage on the control pipe between the oil and gas separator and the unloading valve

2. Excessive fuel consumption:

a. The oil level is too high

b, oil and gas separator filter element failure

c, too much foam to replace the recommended number of oil

d, oil and gas separator filter core return oil pipe joint at the flow limit hole is blocked

3, compressor overtemperature:

a, no oil or low oil level

b, the oil filter is blocked

C. The oil cut-off valve fails, and the spool is stuck

d, oil and gas separator filter block or excessive resistance

e, the oil cooler surface is blocked

4. Increased noise:

a, intake end bearing damage

b, exhaust bearing damage

c, motor bearing damage

5, after stopping the air oil spray from the air filter: compressor check valve leakage or damage;

6. Oil injection in the air filter after parking: the oil cut-off valve is blocked;