CN111058965A - Clearance sealing structure of refrigerating machine - Google Patents

Clearance sealing structure of refrigerating machine Download PDF

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Publication number
CN111058965A
CN111058965A CN201911129460.3A CN201911129460A CN111058965A CN 111058965 A CN111058965 A CN 111058965A CN 201911129460 A CN201911129460 A CN 201911129460A CN 111058965 A CN111058965 A CN 111058965A
Authority
CN
China
Prior art keywords
piston main
main body
refrigerator
seal structure
porous body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911129460.3A
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Chinese (zh)
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Houku Technology Co Ltd
Original Assignee
Shanghai Houku Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Houku Technology Co Ltd filed Critical Shanghai Houku Technology Co Ltd
Priority to CN201911129460.3A priority Critical patent/CN111058965A/en
Publication of CN111058965A publication Critical patent/CN111058965A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053—Component parts or details
    • F02G1/0535—Seals or sealing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053—Component parts or details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
    • F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
    • F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
    • F16C32/0618—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings via porous material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/01—Pistons; Trunk pistons; Plungers characterised by the use of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/09—Pistons; Trunk pistons; Plungers with means for guiding fluids

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Dispersion Chemistry (AREA)
  • Compressor (AREA)

Abstract

The invention discloses a refrigerator clearance sealing structure, which comprises a machine body and a piston main body, wherein the piston main body is of a hollow structure, the piston main body is provided with an air hole and a recess, the recess is positioned on the outer surface of the piston main body, the air hole penetrates through the piston main body, and two ends of the air hole are respectively communicated with the interior of the piston main body and the recess.

Description

Clearance sealing structure of refrigerating machine
Technical Field
The invention relates to a refrigerator, in particular to a gap sealing structure 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 gas distribution piston and the power piston in the refrigerator are high-frequency moving parts, friction is easily generated with a machine body in the working process, and because the working medium is gas, enough radial rigidity of the gas bearing needs to be provided under the condition of low gas consumption, and the sealing property and the lubricating property are ensured.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a refrigerator clearance sealing structure which can provide enough radial rigidity of a gas bearing and ensure the sealing property and the lubricating property under the condition of low gas consumption.
The utility model provides a refrigerator clearance seal structure, includes fuselage and piston main part, the piston main part is hollow structure, the piston main part is equipped with gas pocket and cave, the cave is located piston main part surface, the gas pocket runs through piston main part and both ends respectively with the piston main part is inside reaches the cave intercommunication, refrigerator clearance seal structure still includes gas bearing and porous body, gas bearing will the porous body is pressed piston main part internal surface, gas working medium in the piston main part receives the atmospheric pressure stream through gas bearing reaches the porous body is followed the gas pocket reaches the cave flows out, makes the piston main part reaches form the gas film clearance between the fuselage, form sealedly.
Further, the outer surface of the piston main body is plated with engineering plastics.
Further, the engineering plastic is polytetrafluoroethylene.
Further, the thickness of the plating layer is 35um-45 um.
Further, the porous body is made of ultra-high molecular weight polyethylene.
Further, the porosity of the porous body is 30% -40%.
Further, the porous body has a thickness of 0.35 to 0.75 mm.
Further, the porous body is in interference fit with the inner wall of the piston main body.
Further, the gas bearing is interference fit with the porous body.
Compared with the prior art, the piston main body of the refrigerator clearance sealing structure is of a hollow structure, the piston main body is provided with the air holes and the recess, the recess is positioned on the outer surface of the piston main body, the air holes penetrate through the piston main body, two ends of the air holes are respectively communicated with the interior of the piston main body and the recess, the refrigerator clearance sealing structure also comprises the gas bearing and the porous body, the porous body is pressed on the inner surface of the piston main body by the gas bearing, and gas working media in the piston main body flow through the gas bearing and the porous body under the air pressure and flow out from the air holes and the recess, so that a gas film clearance is formed between the piston main body and a machine body to form sealing.
Drawings
FIG. 1 is a schematic structural view of a refrigerator clearance seal structure according to the present invention;
fig. 2 is an enlarged view of the refrigerator clearance seal structure a of fig. 1.
In the figure: 10. a body; 20. a piston body; 21. air holes; 22. a pocket; 30. a gas bearing; 40. a porous body; 50. air film gaps.
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 2, a refrigerator clearance sealing structure according to the present invention includes a body 10, a piston main body 20, a gas bearing 30, and a porous body 40.
The piston body 20 is a hollow structure and has an air hole 21 and a recess 22. The recess 22 is formed on the outer surface of the piston body 20, and the air hole 21 is a through hole having one end communicating with the inside of the piston body 20 and the other end communicating with the recess 22. The outer surface of the piston main body 20 is plated with engineering plastics. In this embodiment, the engineering plastic is polytetrafluoroethylene. The thickness of the plating layer is 35-45 um.
The gas bearing 30 is a double row 8-aperture bearing. The porous body 40 is made of ultra-high molecular weight polyethylene, and has a porosity of 30-40% and a thickness of 0.35-0.75 mm. The porous body 40 is in interference fit with the inner wall of the piston main body 20, and the gas bearing 30 is in interference fit with the porous body 40 to press the porous body 40 against the inner wall of the piston main body 20. The piston body 20 is accommodated in the body 10 and is in clearance fit with the body 10.
The gas working medium in the piston main body 20 is in a high-pressure state, flows through the gas bearing 30 and the porous body 40, flows through the air hole 21 and the recess 22, enters a gap between the machine body 10 and the piston main body 20, and forms an air film gap 50 to provide radial rigidity for the piston.
Through the design, under the condition of low air consumption, enough radial rigidity of the gas bearing is provided, and the sealing performance and the lubricating performance are ensured.
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 (9)

1. The utility model provides a refrigerator clearance seal structure, includes fuselage and piston main part, its characterized in that: the piston main body is of a hollow structure, the piston main body is provided with an air hole and a recess, the recess is located on the outer surface of the piston main body, the air hole penetrates through the piston main body, two ends of the air hole are respectively communicated with the interior of the piston main body and the recess, the refrigerator clearance sealing structure further comprises an air bearing and a porous body, the porous body is pressed on the inner surface of the piston main body by the air bearing, and a gas working medium in the piston main body flows out of the air hole and the recess through the air bearing and the porous body under the action of air pressure, so that a gas film clearance is formed between the piston main body and the machine body to form sealing.
2. The refrigerator gap seal structure according to claim 1, characterized in that: the outer surface of the piston main body is plated with engineering plastics.
3. The refrigerator gap seal structure according to claim 2, characterized in that: the engineering plastic is polytetrafluoroethylene.
4. The refrigerator gap seal structure according to claim 3, characterized in that: the thickness of the plating layer is 35um-45 um.
5. The refrigerator gap seal structure according to claim 1, characterized in that: the porous body is made of ultra-high molecular weight polyethylene.
6. The refrigerator gap seal structure according to claim 5, characterized in that: the porosity of the porous body is 30-40%.
7. The refrigerator gap seal structure according to claim 5, characterized in that: the thickness of the porous body is 0.35-0.75 mm.
8. The refrigerator gap seal structure according to claim 1, characterized in that: the porous body is in interference fit with the inner wall of the piston main body.
9. The refrigerator gap seal structure according to claim 8, characterized in that: the gas bearing is in interference fit with the porous body.
CN201911129460.3A 2019-11-18 2019-11-18 Clearance sealing structure of refrigerating machine Pending CN111058965A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911129460.3A CN111058965A (en) 2019-11-18 2019-11-18 Clearance sealing structure of refrigerating machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911129460.3A CN111058965A (en) 2019-11-18 2019-11-18 Clearance sealing structure of refrigerating machine

Publications (1)

Publication Number Publication Date
CN111058965A true CN111058965A (en) 2020-04-24

Family

ID=70297831

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911129460.3A Pending CN111058965A (en) 2019-11-18 2019-11-18 Clearance sealing structure of refrigerating machine

Country Status (1)

Country Link
CN (1) CN111058965A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3547005A (en) * 1966-03-22 1970-12-15 Philips Corp Device with rolling diaphragm seal separating gas and liquid
JPS57116973A (en) * 1981-01-12 1982-07-21 Nissan Motor Co Ltd Shaft seal device of hot gas engine
JPS58104347A (en) * 1981-12-16 1983-06-21 Aisin Seiki Co Ltd Seal rod for stirling cycle engine
CN1421501A (en) * 2002-12-19 2003-06-04 中国科学院兰州化学物理研究所 Antiwear lubricating paint for engine piston ring
CN108870792A (en) * 2018-08-02 2018-11-23 杨厚成 A kind of sound energy refrigerator device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3547005A (en) * 1966-03-22 1970-12-15 Philips Corp Device with rolling diaphragm seal separating gas and liquid
JPS57116973A (en) * 1981-01-12 1982-07-21 Nissan Motor Co Ltd Shaft seal device of hot gas engine
JPS58104347A (en) * 1981-12-16 1983-06-21 Aisin Seiki Co Ltd Seal rod for stirling cycle engine
CN1421501A (en) * 2002-12-19 2003-06-04 中国科学院兰州化学物理研究所 Antiwear lubricating paint for engine piston ring
CN108870792A (en) * 2018-08-02 2018-11-23 杨厚成 A kind of sound energy refrigerator device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
赵士钦等: "活塞表面处理技术综述", 《内燃机配件》 *

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Application publication date: 20200424