FIELD: hydraulic displacement machines.
SUBSTANCE: group of inventions refers to a screw compressor and a method carried out with its use. Screw compressor with fluid injection is provided with inlet valve (6) and outlet valve (19), liquid circulation circuit (20) with injector (22), control unit (35) for moving the compressor from an unloaded state to a loaded state. In the unloaded state, inlet valve (6) is closed, and outlet valve (19) is open. In the loaded state, inlet valve (6) is open and exhaust valve (19) is closed. During this transition, when the injection pressure is below the minimum threshold value, inlet valve (6) remains closed and opens with a certain delay. Here, means are used to gradually increase the injection pressure during this lag and to open inlet valve (6) when the injection pressure reaches a minimum threshold value.
EFFECT: group of inventions is aimed at eliminating the causes that lead to damage and failure of the screw compressor.
19 cl, 8 dwg
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