It is strictly forbidden to reverse after the temperature and shock test chamber refrigeration compressor is stopped. When the compressor rotor is stationary, a large amount of process gas remains in the pipeline at this time, and has a certain pressure. At this time, the compressor rotor stops rotating, and the temperature in the compressor of the temperature shock test chamber is lower than the pipeline pressure. At this time, if the check valve is not installed on the compressor outlet line or the check valve is far away from the compressor outlet, the gas in the pipeline will flow backwards, causing the compressor to reverse, and also drive the steam turbine or the electric motor and the gearbox. Wait for the rotor to reverse. The reversal of the rotor of the compressor unit will destroy the normal lubrication of the bearing, which will change the force condition of the thrust bearing, and even cause the loss of the thrust bearing. The dry gas seal will also be damaged due to the reverse of the temperature shock test chamber compressor.
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