Rotary cylinder piston compressor pump and compressor with rotary cylinder piston compressor pump

Patent metadata

Field	Value
Publication number	US-11566619-B2
Application number	US-202117390669-A
Country	US
Kind code	B2
Filing date	Jul 30, 2021
Priority date	Jul 29, 2016
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A rotary cylinder piston compressor pump is provided, including a rotating shaft (2), a piston (3) and a cylinder (4). A rotating shaft hole (21) is provided in the rotating shaft (2). An oil guiding channel, provided in the cylinder (4), communicating with the rotating shaft hole (21). A recess (45) is formed in the inner end face of the cylinder (4). An oil path (61) sealed relative to a compression cavity (49) of the cylinder (4) is formed between the recess (45) and the piston (3). The oil path (61) between the recess (45) and the piston (3) is communicated with an oil path (62) between the piston (3) and the rotating shaft (2) and is communicated with the oil guiding channel by means of an oil returning channel. Also provided is a compressor including the compressor pump.

First claim

What is claimed is:

1. A rotary cylinder piston compressor pump, comprising a rotating shaft ( 2 ), a piston ( 3 ) and a cylinder ( 4 ), a rotating shaft hole ( 21 ) being provided in the rotating shaft ( 2 ), and an oil guiding channel, provided in the cylinder ( 4 ), communicating with the rotating shaft hole ( 21 ),
wherein a recess ( 45 ) is formed in an inner end face of the cylinder ( 4 ), an oil path ( 61 ) sealed relative to a compression cavity ( 49 ) of the cylinder ( 4 ) is formed between the recess ( 45 ) and the piston ( 3 ), and the oil path ( 61 ) between the recess ( 45 ) and the piston ( 3 ) is communicated with an oil path ( 62 ) between the piston ( 3 ) and the rotating shaft ( 2 ) and is communicated with the oil guiding channel by means of an oil returning channel,
the oil returning channel comprises a cylinder oil hole ( 46 ) provided on the cylinder ( 4 ), and the cylinder oil hole ( 46 ) penetrates through a bottom of the recess ( 45 ) and an outer surface of the cylinder ( 4 ).

2. The rotary cylinder piston compressor pump as claimed in claim 1 , wherein the cylinder ( 4 ) comprises a cylinder short shaft ( 42 ), the oil returning channel further comprises a cylinder short shaft hole ( 47 ) provided on the cylinder short shaft ( 42 ), the cylinder short shaft hole ( 47 ) is communicated with the cylinder oil hole ( 46 ), and the cylinder short shaft hole ( 47 ) penetrates entirely through a wall of the cylinder short shaft ( 42 ).

3. The rotary cylinder piston compressor pump as claimed in claim 1 , wherein the rotating shaft hole ( 21 ) has a first cross-sectional area and the oil guiding channel has a second cross-sectional area; whereas the first cross-sectional area and the second cross-sectional area axially overlap creating a third cross-sectional area; and the third cross-sectional area is not less than 20% of the first cross-sectional area.

4. The rotary cylinder piston compressor pump as claimed in claim 1 , wherein the cylinder ( 4 ) comprises a cylinder short shaft ( 42 ), and the oil guiding channel is a cylinder hole ( 43 ) provided in the cylinder short shaft ( 42 ).

5. The rotary cylinder piston compressor pump as claimed in claim 1 , wherein the oil guiding channel is an oil guiding pipe ( 7 ); the cylinder ( 4 ) comprises a cylinder short shaft ( 42 ), the cylinder short shaft ( 42 ) is provided with a through hole structure ( 48 ) for providing a moving space for movement of the oil guiding pipe ( 7 ), and the oil guiding pipe ( 7 ) is disposed in the through hole structure ( 48 ); and an outlet end of the oil guiding pipe ( 7 ) is mounted on the rotating shaft ( 2 ), the outlet end of the oil guiding pipe ( 7 ) is abutted with the rotating shaft hole ( 21 ), and an oil guiding sheet ( 8 ) is disposed in the oil guiding pipe ( 7 ).

6. The rotary cylinder piston compressor pump as claimed in claim 1 , wherein a rotating shaft hole oil guiding sheet ( 22 ) is disposed in the rotating shaft hole ( 21 ).

7. The rotary cylinder piston compressor pump as claimed in claim 1 , wherein a piston oil hole ( 31 ) penetrating through an inner surface and an outer surface of the piston ( 3 ) is provided on a side wall of the piston ( 3 ).

8. The rotary cylinder piston compressor pump as claimed in claim 1 , wherein an inlet end ( 211 ) of the rotating shaft hole ( 21 ) is a tapered structure flared outward.

9. The rotary cylinder piston compressor pump as claimed in claim 3 , wherein the cylinder ( 4 ) comprises a cylinder short shaft ( 42 ), and the oil guiding channel is a cylinder hole ( 43 ) provided in the cylinder short shaft ( 42 ).

10. The rotary cylinder piston compressor pump as claimed in claim 3 , wherein the oil guiding channel is an oil guiding pipe ( 7 ); the cylinder ( 4 ) comprises a cylinder short shaft ( 42 ), the cylinder short shaft ( 42 ) is provided with a through hole structure ( 48 ) for providing a moving space for movement of the oil guiding pipe ( 7 ), and the oil guiding pipe ( 7 ) is disposed in the through hole structure ( 48 ); and an outlet end of the oil guiding pipe ( 7 ) is mounted on the rotating shaft ( 2 ), the outlet end of the oil guiding pipe ( 7 ) is abutted with the rotating shaft hole ( 21 ), and an oil guiding sheet ( 8 ) is disposed in the oil guiding pipe ( 7 ).

11. A compressor, comprising a housing component ( 71 ), a motor component ( 72 ), the rotary cylinder piston compressor pump as claimed in claim 1 , an upper cover component ( 73 ) and a lower cover component ( 74 ).

Assignees

• Gree Green Refrigeration Tech Ct Co Ltd Zhuhai

Inventors

• Huang Hui
• Hu Yusheng
• Deng Liying
• Du Zhongcheng
• Xu Jia

Classifications

• F04C2240/60

  Shafts · CPC title

• F25B2500/16

  Lubrication · CPC title

• F04C2240/603

  with internal channels for fluid distribution, e.g. hollow shaft · CPC title

• F04C15/0088 Primary

  Lubrication (of machines or engines in general F01M) · CPC title

• F16N13/20

  Rotary pumps (with distributing equipment F16N13/22) · CPC title