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anna@shdhh.com

+86-17321062761

Features and mechanism of air compressor

The compressor is directly driven by the electric motor, which causes the crankshaft to rotate, and drives the connecting rod to cause the piston to reciprocate, causing the 

cylinder volume to change. Due to the change of the pressure in the cylinder, the air enters the cylinder through the air filter (muffler) through the intake valve, and in the compression stroke, Due to the reduction of the cylinder volume, the compressed air passes through the exhaust valve and enters the air storage tank through the exhaust pipe and the one-way valve (check valve). When the exhaust pressure reaches the rated pressure of 0.7MPa, the compressed air is automatically controlled by the pressure switch. 


Downtime. When the pressure of the gas storage tank drops to 0.5--0.6MPa  The switch is automatically connected and started.


The air compressor is the core equipment of the pneumatic system. It is the main body of the electromechanical bleed air source device. It is a device that converts the mechanical energy of the prime mover (usually an electric motor or a diesel engine) into gas pressure energy. It is a compression device. Air pressure generating device.Composition structure


1.


Oil circulation system


Before starting, first start the oil pump control system. After the oil pump control system is started, ensure that the lubrication parts of the air compressor are well lubricated. At the same time, the oil pump control system can be adjusted through the built-in temperature control valve.Reduce internal oil pressure and oil temperature to meet system needs.


2. Air circulation system


When the air compressor compressor is working, the air is sucked through the self-cleaning air filter, and the filter is automatically cleaned by PLC. 


The air enters the first stage compression after the inlet guide vane is automatically adjusted, and the temperature of the first stage compressed gas is higher. , And then enter the intercooler for cooling(In the water pipe, outside the gas pipe, the water flow of the intercooler is required to be 110m/h) After entering the secondary compression system, in order to prevent the gas in the system from being poured into the compression chamber (avoid starting under pressure) A suspended full-open check valve is installed in the exhaust pipe, and the air discharged from the compressorThe body pushes open the check valve to enter the exhaust muffler, then enters the primary aftercooler, the secondary aftercooler, and then enters the exhaust main pipe.


3. Water circulation system


The cooling water enters the air compressor intercooler through the pipeline to cool down the gas discharged from the first stage compression, and then enters the aftercooler to cool the exhaust gas, and the other cooling water inlet pipeline passes through the two sets of heat exchangers on the upper part of the main motor To cool the motor windings, and there is a way to the oil cooler Cool down.


4. Power distribution system


The air compressor is a 2000kW high voltage motor (10kV) with full voltage start. The control cabinet is an indoor AC, metal armored withdrawable switchgear. The switchgear is composed of a fixed cabinet and a withdrawable part, namely a handcart. The purpose of control, protection and monitoring has the "five prevention"Features.


5. Screen protection system


The central signal device is divided into two types: accident signal and forecast signal. The main task of the accident signal is to send out the 


sound signal in time when the circuit breaker accidentally trips, and make the corresponding circuit breaker light position signal flash. The main task of the forewarning signal is an abnormality in the running equipment


In the event of a phenomenon, an acoustic signal is sent out instantaneously or delayed, and the light plate shows the content of the abnormal phenomenon.


6. DC power supply system


The PZ32 series of automatic maintenance-free lead-acid battery DC power supply equipment is composed of a charging device screen, a DC feed screen and a battery. It has the functions of automatic current stabilization, automatic voltage stabilization, and automatic voltage regulation. It is a central signal screen and high-voltage control system. Provide power.


7. DTC control system


The DTC control panel is the "brain" of the air compressor. The values of various field sensors are finally summarized on the DTC control panel. Various operating parameters are displayed on the DTC control panel, and the operating status of each part of the air compressor is monitored. When these parameters exceed the allowable range, DTC will issue the corresponding Alarm or automatically stop the air compressor.


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