Frequency conversion helical-lobe compressor rotor structure and frequency conversion helical-lobe compressor

Abstract

The invention discloses a frequency conversion helical-lobe compressor rotor structure and a frequency conversion helical-lobe compressor, and relates to the field of compressors. Lubricating oil can be supplied according to the rotating speed of the frequency conversion helical-lobe compressor. The frequency conversion helical-lobe compressor rotor structure comprises a rotor part, a supporting base and a supporting part. The supporting part is arranged in a cavity of the supporting base. The journal end of the rotor part is supported by the supporting part, and the engaged portion of the rotor part is located outside the supporting base. A first oil duct is formed in the journal of the rotor part, and a second oil duct is formed in the supporting base. The first oil duct and the second oil duct communicate with each other periodically. External oil can flow through the supporting part in the cavity through the second oil duct and the first oil duct in sequence. According to the frequency conversion helical-lobe compressor rotor structure provided by the invention in the technical scheme, the first oil duct and the second oil duct communicate with each other periodically, the communicating period is related to the rotating speed of the rotor part, the communicating period can be directly set according to the rotating speed of the rotor part, and the lubricating oil can be supplied as required.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a variable frequency screw compressor rotor structure and a frequency variable screw compressor. Background technique [0002] The screw compressor bearings are lubricated by oil injection, and the oil plays a role in lubricating and cooling the bearings during the operation of the compressor. At present, the structure of the compressor bearing used by all compressor manufacturers is as follows: the male rotor and the female rotor are respectively assembled on different bearings in the bearing housing, and the two bearings support the male rotor and the female rotor respectively. [0003] The principle of lubricating oil supply is as follows: the high-pressure lubricating oil from the oil cylinder supplies oil to lubricate the male rotor end bearing and the female rotor end bearing respectively through the oil passage on the bearing seat. There will be continuous lube. [0004] The i...

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Problems solved by technology

[0004] The inventors found that there are at least the following problems in the prior art: as long as the pressure difference between the two ends of the oil supply is constant, the oil flow rate supplied to the bearing is constant, and this structure will cause the problem of excessive oil supply when used in a variable frequency screw compressor, especially When the variable frequency screw compressor is running at low speed, the bearing does not need so much lubricating oil

Too much lubricating oil will increase the oil churning power of the bearing, increase the power consumption of the compressor, and reduce the efficiency of the compressor at low speed

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