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Rotary compressor and method for improving its lubricating effect

A technology of rotary compressor and compression mechanism, used in rotary piston/oscillating piston pump components, mechanical equipment, non-variable-capacity pumps, etc. To improve the lubrication effect and system performance, reduce wear and improve the lubrication effect

Active Publication Date: 2019-01-29
EMERSON CLIMATE TECH (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the suction superheat is reduced, it will inevitably lead to incomplete evaporation of the liquid refrigerant in the evaporator, and the liquid refrigerant will flow back to the compressor, causing dilution of the oil in the oil pool
[0004] There are many ways to solve the problem of high oil dilution in the compressor oil pool caused by a large amount of liquid return in the existing system, but it will bring other defects, and none of them can solve the high Exhaust temperature problem

Method used

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  • Rotary compressor and method for improving its lubricating effect
  • Rotary compressor and method for improving its lubricating effect
  • Rotary compressor and method for improving its lubricating effect

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no. 1 approach

[0059] The following will refer to Figure 7 The compressor 300 according to the third embodiment of the present invention is described, except for the oil return passage, the compressor 300 is basically the same as the compressor 100 according to the first embodiment, so corresponding reference numerals starting with 3 are used to designate corresponding elements and will not be described again. exist Figure 7 The exhaust pipe is not shown, but it should be understood that it can also be provided with figure 2 and image 3 The exhaust pipe in 180 is similar to the exhaust pipe.

[0060] In the compressor 300 according to this embodiment, a substantially cylindrical pipe 392 is hermetically fixed outside the compressor housing 310 so that a housing sandwich portion 374a is formed between the housing 310 and the cylindrical pipe 392 , the casing interlayer portion 374a serves as a part of the oil return channel 374 . Thus, the oil return channel 374 includes: a casing in...

no. 4 approach

[0064] In addition, although the scroll compressor has been mainly described above as an example, the concept of the present invention is not limited to the scroll compressor, but can also be applied to other types of compressors including a rotating shaft, such as screw compressors , rotary compressors, etc., and any type of rotating machinery including a rotating shaft and oil sump. As the fourth embodiment of the present invention, the following will combine Figure 8 A rotary compressor 400 is described.

[0065] The rotary compressor 400 includes a casing 410 on which intake pipes 404 , 406 and an exhaust pipe 412 are disposed. A compression mechanism 420 and a driving mechanism 440 (such as a motor) that drives the compression mechanism 420 via a rotation shaft 430 are accommodated in the housing 410 . The compression mechanism 420 is a rotor type compression mechanism, for example including two compression chambers. The rotary shaft 430 is supported by an upper beari...

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Abstract

The invention provides a rotary compressor, which comprises: a housing; a compression mechanism; an oil pool, wherein a lubricating oil is stored in the oil pool; a rotation shaft, wherein a lubricating oil channel communicated to the oil pool is arranged in the rotation shaft, and the rotation shaft is supported by an upper bearing seat and a lower bearing seat; and a drive mechanism, wherein the drive mechanism drives the compression mechanism by the rotation shaft, the oil pool comprises a first oil pool and a second oil pool, the first oil pool and the second oil pool are communicated through a first oil inlet, the lubricating oil channel is communicated to the second oil pool, the compressor is further provided with an oil returning channel, the high temperature lubricating oil of the rotary compressor is introduced into the second oil pool by the oil returning channel during the working process of the compressor, and the temperature of the high temperature lubricating oil is higher than the temperature of the lubricating oil in the first oil pool. The invention further provides a method for improving the lubricating effect of the rotary compressor. According to the present invention, the dilution degree of the lubricating oil in the lubricating system of the compressor can be reduced so as to improve the lubricating effect and improve the reliability.

Description

technical field [0001] The invention relates to a rotary compressor and a method for improving the lubricating effect of the rotary compressor. Background technique [0002] When the air conditioning system including the rotary compressor is operating at low temperature, or the refrigeration system including the rotary compressor is operating normally, the fluid refrigerant in the evaporator cannot be fully replaced due to the low ambient temperature of the evaporator. Heat and evaporate into gas, causing a large amount of liquid refrigerant to flow back into the compressor and fall into the oil sump at the bottom of the compressor. At this time, the oil in the oil pool will be diluted by the liquid refrigerant, resulting in a sharp drop in viscosity. The oil with reduced viscosity is pumped into the bearing, resulting in a reduction in the thickness of the oil film, and even the inability to form an effective oil film, resulting in bearing wear and failure. When defrostin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C29/02F04D29/063
Inventor 苏晓耕黄逊彬纪高锋
Owner EMERSON CLIMATE TECH (SUZHOU) CO LTD