CN111121334A

CN111121334A - Refrigerating machine power piston component

Info

Publication number: CN111121334A
Application number: CN201911128251.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shanghai Houku Technology Co Ltd
Current assignee: Shanghai Houku Technology Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-05-08

Abstract

The invention discloses a power piston component of a refrigerating machine, which comprises a magnet tank component, a piston component, a balancing weight and a plate spring, wherein the piston component comprises an outer sleeve, a sealing column and a gland, the sealing column is arranged in the outer sleeve, the gland is arranged at the end part of the outer sleeve and is abutted against the sealing column to prevent the sealing column from being separated from the outer sleeve, a buffer cavity is formed between the sealing column and the outer sleeve, the outer sleeve is positioned in the magnet tank component and is fixedly connected with the magnet tank component, the balancing weight and the plate spring are fixed at the bottom of the outer sleeve, and through the design, the power piston component of the refrigerating machine is.

Description

Refrigerating machine power piston component

Technical Field

The invention relates to a refrigerator, in particular to a power piston component of the refrigerator.

Background

The Stirling refrigerator refrigerates by a cycle of cooling, compressing, absorbing heat and expanding working medium (hydrogen or helium) in a cylinder. The power piston is an important component of the Stirling refrigerator, and the Stirling refrigerator organizes the flow of working media in a closed circulation system by means of the movement of the power piston.

However, the existing power piston has the defects of complex structure, heavy weight and large loss of friction and inertia force.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a power piston component of a refrigerator, which has light structure and small friction and inertia force.

The utility model provides a refrigerator power piston part, includes magnetite jar subassembly, piston assembly, balancing weight and leaf spring, piston assembly includes the outer sleeve, sealed post and gland, sealed post install in the outer sleeve, the gland install in outer sleeve tip and with sealed post is contradicted in order to prevent sealed post breaks away from the outer sleeve, sealed post with form the cushion chamber between the outer sleeve, the outer sleeve is located in the magnetite jar subassembly and with magnetite jar subassembly fixed connection, the balancing weight reaches the leaf spring is fixed in the outer sleeve bottom.

Further, the piston assembly further comprises a porous body and an air bearing retainer ring, the porous body is in interference fit with the inner wall of the outer sleeve, and the air bearing retainer ring is in interference fit with the porous body to press the porous body on the inner wall of the outer sleeve.

Further, the porous body is made of ultra-high molecular weight polyethylene.

Further, the porous body and the gas bearing retainer ring are located in the buffer chamber.

Furthermore, the outer sleeve is provided with an exhaust hole, the exhaust hole is positioned on one side of the porous body and the gas bearing retainer ring, and the exhaust hole is communicated with the buffer cavity through the porous body and the gas bearing retainer ring.

Further, piston assembly still includes the atmoseal subassembly, the atmoseal subassembly includes filter tip and filter screen, the filter tip is located in the gland, the filter screen is located the filter tip below.

Further, the filter interior communicates with the buffer cavity.

Further, the gas seal assembly further comprises a hard spring and a soft spring, and the hard spring and the soft spring are located between the gland and the outer sleeve.

Further, the hard reed is positioned above the soft reed.

Furthermore, the piston assembly further comprises two sealing rings, one sealing ring is located between the gland and the outer sleeve, and the other sealing ring is located between the gland and the sealing column.

Compared with the prior art, the piston assembly of the power piston component of the refrigerator comprises the outer sleeve, the sealing column and the gland, the sealing column is arranged in the outer sleeve, the gland is arranged at the end part of the outer sleeve and is abutted against the sealing column to prevent the sealing column from being separated from the outer sleeve, the buffering cavity is formed between the sealing column and the outer sleeve, the outer sleeve is positioned in the magnet pot assembly and is fixedly connected with the magnet pot assembly, the balancing weight and the plate spring are fixed at the bottom of the outer sleeve, and through the design, the power piston component of the refrigerator is light in structure and small in friction and.

Drawings

FIG. 1 is a cross-sectional view of a refrigeration unit power piston assembly of the present invention;

FIG. 2 is a top view of the chiller power piston assembly of FIG. 1;

FIG. 3 is a cross-sectional view of the piston assembly of the refrigeration power piston assembly of FIG. 1;

FIG. 4 is another cross-sectional view of the piston assembly of the refrigeration power piston assembly of FIG. 1;

fig. 5 is a top view of a leaf spring of the refrigerator power piston assembly of fig. 1.

In the figure: 10. a magnet pot assembly; 20. a piston assembly; 21. an outer sleeve; 210. an exhaust hole; 211. connecting holes; 212. mounting holes; 213. plating; 22. sealing the column; 23. a porous body; 24. a gas bearing retainer ring; 25. a gland; 26. a gas seal assembly; 260. a filter tip; 261. filtering with a screen; 262. a hard reed; 263. a soft reed; 27. a buffer chamber; 28. a seal ring; 30. a balancing weight; 40. a connecting member; 50. a plate spring; 51. a spiral arm; 510. a transition arc; 511. cutting; 52. a fixing hole; 53. a bevel edge; 60. a fastener.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, a power piston assembly of a refrigerator according to the present invention includes a magnet pot assembly 10, a piston assembly 20, a weight block 30, a connecting member 40, a plate spring 50, and a fastening member 60.

The magnet pot component 10 is a rotor part of the linear motor, is arranged between the soft magnet of the machine body and the motor coil, is fixedly connected with the outer sleeve 21 of the piston component 20 and provides power for the power piston component.

The piston assembly 20 includes an outer sleeve 21, a sealing post 22, a porous body 23, a gas bearing retainer 24, a gland 25, a gas seal assembly 26, and two seal rings 28.

The outer sleeve 21 is made of an aluminum alloy. The outer sleeve 21 is provided with a discharge hole 210, a connection hole 211, and a mounting hole 212. The vent holes 210 are located in the side wall of the outer sleeve 21 and communicate with the interior of the outer sleeve 21. The connecting hole 211 is a blind hole at the bottom of the outer sleeve 21. The mounting hole 212 is located at the center of the bottom of the outer sleeve 21. The outer sleeve 21 is provided with a coating 213 on its outer surface. The plating layer 213 is required to have good wear resistance and to be made of polytetrafluoroethylene (containing polyamideimide and titanium dioxide).

The sealing column 22 is made of carbon fiber filled polytetrafluoroethylene. The sealing post 22 is received inside the outer sleeve 21. The outer diameter of the sealing post 22 is smaller than the inner diameter of the outer sleeve 21, and a buffer cavity 27 is formed between the sealing post 22 and the outer sleeve 21.

The porous body 23 is made of ultra-high molecular weight polyethylene. The gas bearing retainer ring 24 is a double row 8-orifice bearing. The porous body 23 is interference fitted with the inner wall of the outer sleeve 21. The gas bearing retainer ring 24 is in interference fit with the porous body 23 to press the porous body 23 against the inner wall of the outer sleeve 21. At this time, the porous body 23 and the gas bearing retainer 24 are positioned in the buffer chamber 27, and the gas discharge hole 210 is positioned on the porous body 23 side. The exhaust hole 210 communicates with the cushion chamber 27 through the porous body 23 and the gas bearing retainer 24.

The gland 25 is mounted on the end of the outer sleeve 21 and interferes with the sealing post 22 to prevent the sealing post 22 from separating from the outer sleeve 21. A sealing ring 28 is located between the gland 25 and the outer sleeve 21 to provide a seal. Another sealing ring 28 is located between the gland 25 and the sealing post 22 to act as a seal.

Air seal assembly 26 includes filter 260, screen 261, hard reed 262, soft reed 263. Filter 260 is located in the through-hole of gland 25 and filter 261 is located below filter 260. Filter 260 and filter screen 261 can filter the working medium. Hard reed 262 is positioned below screen 261 and soft reed 263 is positioned below hard reed 262.

The weight 30 is fixed to the connection hole 211 of the outer sleeve 21 by the connection member 40.

The thickness of the plate spring 50 is 1.2mm, and the hardness is 50-55 HRC.

The leaf spring 50 is provided with four helical arms 51, the four helical arms 51 being circumferentially distributed. The inner and outer curves of each spiral arm 51 are Archimedes spiral lines, and the two ends of the spiral lines are in smooth transition so as to reduce the local stress concentration phenomenon of the plate spring 50. In this embodiment, a circular arc transition is employed. Transition arc 510 is 3.6mm in diameter. The helix is provided with cuts 511 at the beginning and before the ending to relieve stress. The circle center of the plate spring 50 is provided with a fixing hole 52, and the diameter of the fixing hole 52 is 10.8 mm. The edge of the plate spring 50 is provided with a through hole for fixing the plate spring 50 to the body. The diameter of the through hole is 2.7 mm. The number of the through holes is four, and the four through holes are uniformly distributed on the edge of the plate spring 50 and are positioned on a circle with the diameter of 70 mm. The included angle between the line from the center of the through hole to the center of the plate spring 50 and the line from the center of the nearest transition arc 510 to the center of the plate spring 50 is 10 degrees. The edge of the plate spring 50 is provided with a bevel edge 53, and the included angle between the bevel edge 53 and the vertical line is 45 degrees. The distance from the centre of the circle of the bevel 53 is 32 mm. The leaf spring 50 is fixed to the mounting hole 212 of the outer sleeve 21 by the fastener 60.

The plate spring 50 is fixed on the machine body through the through hole, provides proper axial rigidity and radial rigidity for the reciprocating motion of the power piston component of the refrigerator, and stores and releases the potential energy of the plate spring 50 in a circulating mode. The piston assembly 20 is sealed to the cylinder wall using gas bearings. The air distribution piston rod passes through the piston assembly 20, and the clearance between the air distribution piston rod and the piston assembly 20 is sealed. Through the design, the power piston part of the refrigerator has light structure and small friction and inertia force.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a refrigerator power piston part, includes magnetite jar subassembly, piston assembly, balancing weight and leaf spring, its characterized in that: piston assembly includes the outer sleeve, seals post and gland, sealed post install in the outer sleeve, the gland install in outer sleeve tip and with sealed post is contradicted in order to prevent sealed post breaks away from the outer sleeve, sealed post with form the cushion chamber between the outer sleeve, the outer sleeve is located in the magnetite jar subassembly and with magnetite jar subassembly fixed connection, the balancing weight reaches the leaf spring is fixed in the outer sleeve bottom.

2. The chiller power piston component of claim 1, wherein: the piston assembly further comprises a porous body and an air bearing retainer ring, the porous body is in interference fit with the inner wall of the outer sleeve, and the air bearing retainer ring is in interference fit with the porous body to press the porous body on the inner wall of the outer sleeve.

3. The chiller power piston component of claim 2, wherein: the porous body is made of ultra-high molecular weight polyethylene.

4. The chiller power piston component of claim 2, wherein: the porous body and the gas bearing retainer ring are located in the buffer chamber.

5. The chiller power piston component of claim 4, wherein: the outer sleeve is provided with an exhaust hole, the exhaust hole is positioned on one side of the porous body and the gas bearing retainer ring, and the exhaust hole is communicated with the buffer cavity through the porous body and the gas bearing retainer ring.

6. The chiller power piston component of claim 4, wherein: piston assembly still includes the atmoseal subassembly, the atmoseal subassembly includes filter tip and filter screen, the filter tip is located in the gland, the filter screen is located the filter tip below.

7. The chiller power piston component of claim 6, wherein: the filter tip is inside with the cushion chamber intercommunication.

8. The chiller power piston component of claim 6, wherein: the gas seal assembly further comprises a hard reed and a soft reed, and the hard reed and the soft reed are located between the gland and the outer sleeve.

9. The chiller power piston component of claim 8, wherein: the hard reed is positioned above the soft reed.

10. The chiller power piston component of claim 1, wherein: the piston assembly further comprises two sealing rings, one sealing ring is located between the gland and the outer sleeve, and the other sealing ring is located between the gland and the sealing column.