Medium-high pressure screw compressor

Abstract

The invention provides a medium-high pressure screw compressor. The medium-high pressure screw compressor comprises a screw rotor, a motor and an oil separation barrel, wherein the oil separation barrel comprises an outer barrel and an inner barrel, the inner barrel is arranged inside the outer barrel in a sleeve mode, a hollow gap layer is arranged between the outer barrel and the inner barrel, a multi-stage filtering device is arranged in the inner barrel, a single-stage filtering device is arranged in the gap layer, an inner exhaust port is formed in the inner barrel, an outer exhaust port is formed in the outer cylinder, the inner exhaust port is arranged in the outer exhaust port in a sleeve mode, a hollow annular cavity is formed between the inner exhaust port and the outer exhaust port, after an oil-gas mixture enters the inner barrel, part of the oil-gas mixture enters the multi-stage filtering device to be filtered and is discharged through the inner exhaust port, and the remaining oil-gas mixture enters the gap layer and is discharged through the annular cavity after being filtered through the single-stage filtering device. The medium-high pressure screw compressor has the advantages that the oil-gas separation effect is good, exhaust is smooth, and the occupied space of the filtering device is small.

Description

technical field [0001] The invention relates to a compressor, in particular to a screw compressor, in particular to a medium-high pressure screw compressor. Background technique [0002] In the screw compressor, there will be a device or structure for separating oil and gas, such as an oil separation barrel. The separation effect of oil and gas directly affects the performance and reliability of the screw compressor, so improving the oil separation effect has always been one of the main goals pursued by the design of the screw compressor. [0003] At present, the built-in oil separation barrel of the screw compressor often adopts the separation structure of the oil separation filter, which relies on the dense mesh structure to form resistance to the flow of the oil-gas mixture, reduces the flow rate of the oil-gas mixture, and achieves separation through adsorption and filtration. Purpose. Among them, the effect of oil-gas separation is related to the flow rate of the air ...

AI Technical Summary

Problems solved by technology

[0004] However, after reducing the flow rate of the oil-air mixture, the exhaust efficiency of the compressor will decrease. If the gas in the oil separator barrel is not discharged in time, the working efficiency of the compressor will be reduced and the normal operation of downstream equipment will be affected. Therefore, during the exhaust process It is also necessary to improve the exhaust efficiency to ensure the demand of downstream equipment, especially the circulation demand in the circulation system and reduce the suction power of the compressor. This adverse effect is more obvious for medium and high pressure compressors

[0005] In addition, the oil-air mixture can be filtered multiple times by setting multi-layer filter screens to improve the separation effect, but this will lead to an increase in the volume of the oil separator barrel of the compressor

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