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Compressor

A technology of compressors and compression mechanisms, applied in the field of compressors, can solve the problems of research, severe sliding state of the thrust receiving surface, one-sided contact of the thrust receiving surface, etc., and achieve the effect of a good sliding state

Inactive Publication Date: 2020-10-16
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ball bearings are inferior in terms of cost and long-term reliability as described above.
[0009] As in Patent Document 2, if a sliding bearing is used as the sub-bearing, it is advantageous in terms of cost and long life, but there is a problem that the driving shaft rotating while tilting is in contact with the thrust receiving surface on one side, and the local Hertz The stress becomes higher, and the sliding state on the thrust receiving surface becomes severe
However, in Patent Document 2, no study has been made on the problem of one-sided contact with respect to the thrust receiving surface

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] figure 1 It is a vertical cross-sectional view schematically showing the cross-sectional structure of the scroll compressor according to Embodiment 1 of the present invention. exist figure 1 Among them, the thrust load is indicated by arrow a, and the radial load is indicated by arrow b. figure 2 It is a figure which shows the principal part of the scroll compressor which concerns on Embodiment 1 of this invention. exist figure 2 Among them, (a) is a schematic diagram showing an enlarged view of a portion lower than the sub bearing of the drive shaft, and (b) is a schematic diagram of the shape of the thrust surface of the drive shaft viewed from directly below. In addition, in figure 2 The middle arrow indicates the flow of lubricating oil.

[0026] The scroll compressor 100 is mounted as one of refrigeration equipment constituting a refrigeration cycle apparatus such as a refrigerator, a freezer, a vending machine, an air conditioner, a refrigerating apparatus...

Embodiment approach 2

[0132] Figure 9 It is a figure which shows the principal part of the scroll compressor which concerns on Embodiment 2 of this invention, and is a schematic diagram which expands and shows the part below a sub bearing.

[0133] This Embodiment 2 and figure 2 The basic structure shown is different in that the formation position of the radial oil grooves 7g is replaced from the thrust surface 6f side to the thrust receiving surface 12 side, and the number of the radial oil grooves 7g is increased to a plurality, preferably three or more. . In addition, the thrust receiving surface 12 side is formed only by the flat surface 12b orthogonal to the axial center 6g of the compressor, and does not have the inclined surface 12d. Instead, the thrust surface 6f side is different from the point formed by the inclined surface 6fa inclined from the orthogonal plane orthogonal to the axial center 6g (axis center reference of the compressor). The thrust surface 6f is inclined upward as it...

Embodiment approach 3

[0140] Figure 10 It is a figure which shows the principal part of the scroll compressor which concerns on Embodiment 3 of this invention, and is a schematic diagram which expands and shows the part below a sub bearing.

[0141] The auxiliary frame 8b also bears the thrust load generated by the self-weight of the drive shaft 6 and the magnetic force of the rotor in addition to the radial load. exist figure 2 Among them, the thrust load is received by the upper surface cover 9c of the oil pump 9 arranged below the auxiliary frame 8b, and the upper surface of the upper surface cover 9c becomes the thrust receiving surface 12 . The third embodiment is different in that the thrust load is received by the bottom plate 8bc fixed to the bottom of the auxiliary frame 8b by the bolts 40 , and the upper surface of the bottom plate 8bc becomes the thrust receiving surface 12 . The shape of the thrust bearing surface 12 is the same as figure 2 roughly the same. The shape of the thru...

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PUM

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Abstract

This compressor is provided with: a compression mechanism section disposed within a hermetic container; an electric motor section which drives the compression mechanism section; a drive shaft which transmits the drive force of the electric motor section to the compression mechanism section; a primary bearing which supports the upper part of the drive shaft; a secondary bearing which supports the lower part of the drive shaft; a radial receiving surface which is provided on the secondary bearing and which supports the radial surface of the drive shaft in a slidable manner; and a thrust receiving surface which supports the thrust surface of the drive shaft in a slidable manner. The compressor has, between the thrust surface and the thrust receiving surface: a contact point where the thrust surface and the thrust receiving surface are in contact with each other through curved surfaces; and a gap which continuously increases radially outward from the contact point.

Description

technical field [0001] The present invention relates to a compressor used as one of the constituent elements of a refrigeration cycle apparatus. Background technique [0002] As one of the constituent elements of refrigeration cycle apparatuses such as air conditioners, there is a scroll compressor. The scroll compressor includes a compression mechanism portion having an orbiting scroll and a fixed scroll that mesh with each other, and a motor portion that drives a compression mechanism portion; and a drive shaft that transmits the driving force of the motor portion to the compression mechanism portion. The drive shaft is rotatably supported by main bearings and sub bearings provided on the upper and lower sides of the motor unit. When the drive shaft is driven to rotate by the motor portion, the swing scroll provided on the eccentric shaft portion of the upper end portion of the drive shaft revolves. Thereby, the refrigerant is compressed in the compression chamber provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C29/00
CPCF04C29/00
Inventor 横山哲英岩崎俊明堀口大辅伊藤慎一冈本政哉小山修平
Owner MITSUBISHI ELECTRIC CORP