A two-stage compression single-screw air compressor and its working method

Abstract

The invention provides a two-stage compression single-screw air compressor and a work method thereof, belongs to the technical field of machinery, and solves the problems that in the prior art, two-stage compression single-screw air compressors are easy to damage and have low use stability. The two-stage compression single-screw air compressor comprises an electromotor, an air filter, a one-stage gas-oil separation barrel, a two-stage gas-oil separation barrel, a one-stage compression main machine and a two-stage compression main machine, wherein the one-stage compression main machine and the two-stage compression main machine are in series connection without shaft sealing. A two-stage main machine oil-supplement pipe is arranged between air inlets of the one-stage gas-oil separation barrel and the two-stage compression main machine, and the two-stage main machine oil-supplement pipe is provided with an oil-supplement valve. Through the arrangement of the oil-supplement pipe and the oil-supplement valve between the one-stage gas-oil separation barrel and the two-stage compression main machine, excess compressor oil in the one-stage compression main machine can be transmitted back to the two-stage compression main machine, and the normal work of the two-stage compression single-screw air compressor can be ensured. The two-stage compression single-screw air compressor has the advantages of long life, high efficiency and high reliability.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a general air compressor, in particular to a two-stage compression single-screw air compressor and its working method. Background technique [0002] Since its birth, the single-screw compressor has the structural advantage of being a high-pressure air compressor, but there has been no product on the market, and no relevant literature and papers have been published. The two-stage compression of the twin-screw can reach 4.0Mpa The model market has been sold, but due to its structural reasons, the bearing of the main engine is easily damaged, and the failure rate is very high. In response to the above situation, the applicant once submitted a patent application on June 12, 2012, the application number is 201210193035.2, and the application publication number is CN102705238A. This patent discloses a series-connected multi-stage screw compression without shaft seal The machine is com...

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Problems solved by technology

Although this equipment has the above advantages, there is no shaft seal connection between the front and rear compressor hosts of this type of multi-stage screw compressor, and due to the pressure difference inside the front and rear compressor hosts, after a long period of operation, The compressor oil in the compressor will gradually seep into the previous stage compressor main engine, resulting in insufficient oil supply to the latter stage compressor main engine, which will affect the use effect, and this type of multi-stage screw compressor needs to be sprayed with water or oil and other media during the gas compression process. Mixing, at the same time, a certain ratio of moisture will be produced during the air compression process. If the air is directly discharged after being compressed and used, it will pollute the environment. Therefore, the air needs to be separated in an oil-gas separator before being discharged. The separated oil If the separated oil has many impurities, it will often seriously affect the lubrication conditions and performance of the moving parts in the compressor, and even further affect the operation of the screw compressor. Performance and service life

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