Pump body assembly, fluid machinery, and heat exchange device

Patent metadata

Field	Value
Publication number	US-11208990-B2
Application number	US-201817059119-A
Country	US
Kind code	B2
Filing date	Dec 13, 2018
Priority date	Jul 18, 2018
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A pump assembly, fluid machinery, and a heat exchange device. The pump assembly includes: a lower flange; a lower friction-reducing ring; a cylinder, the lower friction-reducing ring being disposed inside the cylinder, and the lower flange being disposed below the cylinder; and a piston assembly arranged inside the cylinder and includes a piston sleeve and a piston slidably arranged inside the piston sleeve. The lower friction-reducing ring has a central hole. A position-limiting protrusion is disposed on a surface of the piston sleeve, which faces the lower flange. The limiting protrusion extends into the central hole of the lower friction-reducing ring, fits and is limited by the lower flange.

First claim

What is claimed is:

1. A pump body assembly, comprising:
a lower flange;
a lower friction-reducing ring;
a cylinder, the lower friction-reducing ring being disposed inside the cylinder, and the lower flange being disposed below the cylinder; and
a piston assembly arranged inside the cylinder, and comprising a piston sleeve and a piston slidably arranged inside the piston sleeve;
wherein the lower friction-reducing ring has a central hole; a position-limiting protrusion is disposed on a surface of the piston sleeve, and the surface of the piston sleeve faces the lower flange; and the position-limiting protrusion extends into the central hole of the lower friction-reducing ring, fits and is limited by the lower flange, to prevent the piston sleeve from moving in a radial direction relative to the lower flange.

2. The pump body assembly according to claim 1 , wherein a second position-limiting groove is disposed on a surface of the lower flange, and the surface of the lower flange faces the piston sleeve; and the position-limiting protrusion extends into the second position-limiting groove, to prevent the piston sleeve from moving relative to the lower flange in the radial direction.

3. The pump body assembly according to claim 1 , wherein a second extended part is provided on a surface of the lower flange, and the surface of the lower flange faces the piston sleeve; and the second extended part limits and stops the position-limiting protrusion, to prevent the piston sleeve from moving relative to the lower flange in the radial direction.

4. The pump body assembly of claim 3 , wherein the second extended part is disposed outside the position-limiting protrusion.

5. The pump body assembly according to claim 3 , wherein the second extended part is disposed inside the position-limiting protrusion.

6. The pump body assembly according to claim 1 , wherein the position-limiting protrusion is a protruding ring extending towards the lower flange, and the protruding ring and the piston sleeve are coaxially arranged.

7. The pump body assembly according to claim 1 , wherein the position-limiting protrusion comprises a plurality of protruding platforms extending towards the lower flange, and the plurality of the protruding platforms are arranged at intervals along a circumference of the piston sleeve.

8. The pump body assembly according to claim 1 , wherein the pump body assembly further comprises an upper flange and an upper friction-reducing ring; the upper friction-reducing ring is disposed inside the cylinder; the upper flange is disposed above the cylinder; and an upper end surface of the piston sleeve fits and is limited by the upper friction-reducing ring, to prevent the piston sleeve from moving relative to the upper flange in the radial direction.

9. The pump body assembly according to claim 8 , wherein a first extended part is provided on the upper end surface of the piston sleeve, and the first extended part extends into a central hole of the upper friction-reducing ring, fits and is limited by an inner surface of the central hole of the upper friction-reducing ring.

10. The pump body assembly according to claim 8 , wherein a fifth position-limiting groove is disposed on a surface of the upper friction-reducing ring, and the surface of the upper friction-reducing ring faces the piston sleeve; a first extended part is provided on the upper end surface of the piston sleeve; and the first extended part extends into the fifth position-limiting groove, and is limited and stopped by the fifth position-limiting groove.

11. The pump body assembly according to claim 8 , wherein a fourth extended part is disposed on a surface of the upper friction-reducing ring, and the surface of the upper friction-reducing ring faces the piston sleeve; the fourth extended part extends into the piston sleeve, limits and stops an inner surface of the piston sleeve.

12. The pump body assembly according to claim 8 , wherein a fourth extended part is disposed on a surface of the upper friction-reducing ring, and the surface of the upper friction-reducing ring faces the piston sleeve; the fourth extended part extends into a first position-limiting groove disposed on the upper end surface of the piston sleeve, limits and stops the first position-limiting groove.

13. The pump body assembly according to claim 1 , wherein the pump body assembly further comprises an upper flange and an upper friction-reducing ring; the upper friction-reducing ring is disposed inside the cylinder; the upper flange is disposed above the cylinder; the upper friction-reducing ring has a central hole; a first extended part is disposed on an upper end surface of the piston sleeve; and the first extended part extends into the central hole of the upper friction-reducing ring, fits and is limited by a lower end surface of the upper flange, to prevent the piston sleeve from moving relative to the upper flange in the radial direction.

14. The pump body assembly according to claim 13 , wherein the lower end surface of the upper flange has a position-limiting portion extending towards the piston sleeve; the first extended part is limited and stopped by the position-limiting portion, to prevent the piston sleeve from moving relative to the upper flange in the radial direction.

15. The pump body assembly according to claim 13 , wherein a concave part is disposed on a surface of the upper flange, and the surface of the upper flange faces the piston sleeve; the first extended part extends into the concave part, and is limited and stopped by the convex part in the radial direction of the piston sleeve.

16. The pump body assembly according to claim 15 , wherein the first extended part and the concave part are ring-shaped, and the first extended part, the concave part, and the piston sleeve are coaxially arranged.

17. The pump body assembly according to claim 15 , wherein the first extended part is a double-layered ring-shaped structure, and at least one layer of the ring-shaped structure is limited and stopped by an inner groove wall or an outer groove wall of the concave part.

18. The pump body assembly according to claim 1 , wherein the pump body assembly further comprises an upper flange disposed above the piston assembly, and a rotation shaft;
the rotation shaft is provided, and passes through the upper flange, the piston sleeve, and the lower flange in sequence; and the rotation shaft, the upper flange, and the lower flange are coaxially arranged.

19. Fluid machinery, comprising the pump body assembly of claim 1 .

20. A heat exchange device, comprising the fluid machinery of claim 19 .

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Wei Huijun
• Xu Jia
• Du Zhongcheng
• Yang Sen
• Li Zhi
• Liang Shebing
• Ren Liping
• Zhang Rongting
• Shi Zhengliang
• Liu Xixing

Classifications

• F16J9/12

  Details · CPC title

• F01C1/344

  with vanes reciprocating with respect to the inner member · CPC title

• F04C18/344 Primary

  with vanes reciprocating with respect to the inner member · CPC title

• F04B19/22 Primary

  of reciprocating-piston type · CPC title

• F04C2230/603

  Centering; Aligning · CPC title