Compressors

Question 1

Auxiliary lube oil pump set up

Answer 1

The auxiliary pump is run by a SEPARATE driver so that it operates independently from the compressor, at startup and shutdown it lubricates the bearings until the compressor is up to full operating speed or to a stop.

Question 2

Axial compressors

Answer 2

Several rows of vanes with aerofoil crossections are attached. The veins of successive rows keep decreasing height stationary rows are between rotating rows.

Question 3

surging

Answer 3

When there’s not enough gas to replace the gas pushed forward, back flow and back pressure occurs.

Question 4

Manual unloaders

Answer 4

A device in the reciprocating compressor suction valve inlet that prevents
compression of the gas in the cylinder by holding the suction valve open, for
example in reducing the starting load on the driver