Screw oil pump of carbon dioxide compressor

Abstract

The invention discloses a screw oil pump of a carbon dioxide compressor. The screw oil pump comprises a pump shell. The two ends of the pump shell are provided with an end cover and a pump body back cover correspondingly. The end cover and the pump body back cover are connected with the pump shell through bolts and nuts which are matched with the bolts. A driving screw and two driven screws are arranged in the middle of the inner portion of the pump shell. The driven screws are arranged on the two sides of the driving screw. The driving screw and each driven screw are both bidirectional lead screws, and the threads are symmetrically distributed. The three screws are horizontally arranged and mutually symmetrical and meshed. A safety valve is arranged on the top of the pump shell and comprises a pressure adjustment screw, a spring seat and a valve element, wherein the pressure adjustment screw, the spring seat and the valve element are sequentially connected, one end of the pressure adjustment screw is fixed to a valve deck through a locking nut, the valve deck is connected with the pump shell through a third screw nail, and the other end of the pressure adjusting screw is connectedwith the spring seat, the other end of the spring seat is connected with the valve element, the tail end of the valve element is provided with a valve back cover, and the valve back cover is connected with the pump shell through a third screw nail.

Description

technical field [0001] The invention belongs to the technical field of compressor oil pumps, and relates to a screw oil pump for a carbon dioxide gas compressor. Background technique [0002] As a part of the carbon dioxide compressor, the oil pump converts low-pressure oil into high-pressure oil, provides oil delivery power for the compressor, and meets the lubrication and heat dissipation requirements required by the compressor. [0003] The traditional compressor oil pump needs to provide sufficient power source for the compressor or lubricate the compressor, but the oil pump itself will damage the oil pump due to liquid shock caused by excessive lubricating oil or liquid inhaled by the compressor. In addition, the gas inhaled by the compressor is overheated when it is working, and the continuous operation for a long time will also make the compressor body friction and heat, thereby reducing the working efficiency of the equipment. Contents of the invention [0004] Th...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a screw oil pump for carbon dioxide gas compressor, which solves the problems that the existing oil pumps are easy to suck excessive liquid and the efficiency is too low

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