METHOD OF INCREASING GAS PRESSURE Russian patent published in 2017 - IPC F04B25/00 

FIELD: machine engineering.

SUBSTANCE: way of multistage compressor operation is that the gas is supplied to the first stage compressor cylinder, compressed to the pressure necessary to pump it from the first stage, and supplied to the sealed crankcase. Then after levelling pressures of gases in a cylinder and crankcase gas, compressed in the first stage of the compressor, served on the induction in the cylinder of the second stage compressor, which after compression and injection of the second stage of the served in the third level. Third stage piston is mounted on the first stage piston and after compression of gas in the third stage serves to the consumer. Increased pressure in the crankcase is largely or fully compensates for the forces acting on the pistons from the compression cavities. This enables without exceeding the load on the crankshaft using differential pistons and, accordingly, to combine two or more steps in a row.

EFFECT: simplified device compressor and dropping its cost.

1 dwg