Unlock instant, AI-driven research and patent intelligence for your innovation.

Compressor

A technology of compressors and compression mechanisms, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve problems such as cooling, low thermal conductivity, etc.

Active Publication Date: 2015-07-08
DAIKIN IND LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If gaseous refrigerant exists on the sliding surface of the thrust bearing, there is a problem that the sliding surface of the thrust bearing cannot be cooled sufficiently because the thermal conductivity between gas and metal is lower than that between liquid and metal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Compressor
  • Compressor
  • Compressor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0046] The rotary compressor 10 according to the first embodiment of the present invention is installed in, for example, a refrigerant circuit of an air conditioner, and compresses refrigerant sucked in from an evaporator and sprays it toward a radiator. Such as figure 1 As shown, the rotary compressor 10 includes a casing 11 , a motor 20 and a compression mechanism 30 .

[0047] The casing 11 includes a cylindrical trunk portion 12 , an upper end plate 13 sealing the upper end side of the trunk portion 12 , and a lower end plate 14 sealing the lower end side of the trunk portion 12 . The first suction pipe 15a and the second suction pipe 15b are installed on the trunk portion 12 through the lower part of the trunk portion 12; the discharge pipe 16 is installed on the upper side of the upper end plate 13 through the upper end plate 13. part. The motor 20 and the compression mechanism 30 are installed in the casing 11 . An oil reservoir 17 is formed at the bottom of the lowe...

no. 2 approach

[0093] The rotary compressor 10 in the second embodiment omits the groove portion 61 forming the elastic bearing 62 in the first embodiment, and the decompression groove 65 and the second annular groove 74 do not communicate directly, but via a thrust bearing surface. 26a and the gap 65b between the upper end surface 35b of the rear cylinder head 35 communicates indirectly.

[0094] Specifically, as Figure 6 and Figure 7 As shown, the inner peripheral edge of the decompression groove 65 is located closer to the outer peripheral side than the inner peripheral edge of the thrust bearing surface 26a. In the second embodiment, the decompression groove 65 is formed at such a position that the decompression groove 65 and the second annular groove 74 communicate not directly but via the thrust bearing surface 26 a and the upper end surface 35 b of the rear cylinder head 35 . The gap 65b between them communicates indirectly.

[0095] Here, as described above, since the thrust bea...

no. 3 approach

[0101] The rotary compressor 10 in the third embodiment changes the shape of the decompression groove 65 in the first embodiment.

[0102] Specifically, as Figure 8 As shown, in the third embodiment, the axial length of the decompression groove 65 is shorter than that of the first embodiment (the groove depth is shallower). Like the first embodiment, the outer peripheral edge is closer to the outer peripheral side than the outer peripheral edge of the elastic bearing 62 (the inner peripheral edge of the groove portion 61), and the inner peripheral edge is closer to the inner peripheral edge of the elastic bearing 62 (the inner peripheral edge of the rear cylinder head 35). same. In the third embodiment, a portion of the decompression groove 65 opposite to the upper end surface of the elastic bearing 62 is formed as a communication portion 65 a through which the decompression groove 65 communicates with the second annular groove 74 .

[0103]In the third embodiment, the comm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A rotary compressor includes a drive mechanism having a drive shaft with an eccentric part, and a compression mechanism. The compression mechanism includes a tubular cylinder covering an outer periphery of the eccentric part, a piston arranged inside the cylinder and fitted onto the eccentric part, an upper end plate closing an upper end of the cylinder, and a lower end plate closing a lower end of the cylinder. A lower end surface of the eccentric part defines a thrust bearing surface slidably contacting an upper end surface of the lower end plate. The drive shaft has an oil path with lubrication oil circulating through the oil path. The eccentric part has a circumferentially extending pressure reduction groove opening at part of the thrust bearing surface close to an inner circumferential side to reduce a pressure of the lubrication oil supplied from the oil path to the pressure reduction groove.

Description

technical field [0001] The invention relates to a rotary compressor, in particular to a cooling measure for the thrust bearing surface. Background technique [0002] A conventional rotary compressor is known (for example, refer to the following Patent Document 1). The rotary compressor includes a cylinder, an eccentric piston arranged in the cylinder and sheathed on the drive shaft, and an end plate that seals the axial end of the cylinder. compression. [0003] In the above-mentioned rotary compressor, the lower end surface of the eccentric portion and the upper end surface of the lower end plate constituting the lower end plate constitute a thrust bearing for receiving a thrust load. Lubricating oil is supplied between the lower end surface of the eccentric portion and the upper end surface of the lower end plate constituting the sliding surface of the thrust bearing, and the sliding surface of the thrust bearing is cooled by the lubricating oil, thereby preventing the s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F04C29/02F04C18/32F04C29/00F04C29/04
CPCF04C2240/56F04C18/22F04C23/001F04C18/322F04C29/028F04C29/023F04C23/008
Inventor 富冈直人金山武弘上石田弘毅
Owner DAIKIN IND LTD