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CN111058965A - 一种制冷机间隙密封结构 - Google Patents

一种制冷机间隙密封结构 Download PDF

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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
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piston main
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refrigerator
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不公告发明人
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Shanghai Houku Technology Co Ltd
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    • 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

本发明公开了一种制冷机间隙密封结构，包括机身及活塞主体，活塞主体为中空结构，活塞主体设有气孔及凹穴，凹穴位于活塞主体外表面，气孔贯穿活塞主体并且两端分别与活塞主体内部及凹穴连通，制冷机间隙密封结构还包括气体轴承及多孔体，气体轴承将多孔体按压在活塞主体内表面，活塞主体内的气体工质受气压流经气体轴承及多孔体从气孔及凹穴流出，使活塞主体及机身之间形成气膜间隙，形成密封，通过上述设计，在较小的耗气量状态下，提供足够多的气体轴承径向刚度，并保证密封性及润滑性。

Description

一种制冷机间隙密封结构
技术领域
本发明涉及制冷机，尤其是涉及一种制冷机间隙密封结构。
背景技术
斯特林制冷机是通过气缸内的工质(氢气或氦气)经过冷却、压缩、吸热、膨胀为一个周期的循环来制冷。制冷机中的配气活塞和动力活塞为高频运动部件，在工作过程中容易与机身产生摩擦，由于工质为气体，需要在较小的耗气量状态下，提供足够多的气体轴承径向刚度，并保证密封性及润滑性。
发明内容
为了克服现有技术的不足，本发明的目的在于提供一种在较小的耗气量状态下，提供足够多的气体轴承径向刚度，并保证密封性及润滑性的制冷机间隙密封结构。
一种制冷机间隙密封结构，包括机身及活塞主体，所述活塞主体为中空结构，所述活塞主体设有气孔及凹穴，所述凹穴位于所述活塞主体外表面，所述气孔贯穿所述活塞主体并且两端分别与所述活塞主体内部及所述凹穴连通，所述制冷机间隙密封结构还包括气体轴承及多孔体，所述气体轴承将所述多孔体按压在所述活塞主体内表面，所述活塞主体内的气体工质受气压流经所述气体轴承及所述多孔体从所述气孔及所述凹穴流出，使所述活塞主体及所述机身之间形成气膜间隙，形成密封。
进一步地，所述活塞主体外表面镀有工程塑料。
进一步地，所述工程塑料为聚四氟乙烯。
进一步地，镀层厚度为35um-45um。
进一步地，所述多孔体由超高分子量聚乙烯制成。
进一步地，所述多孔体孔隙率为30％-40％。
进一步地，所述多孔体厚度为0.35-0.75mm。
进一步地，所述多孔体与所述活塞主体内壁过盈配合。
进一步地，所述气体轴承与所述多孔体过盈配合。
相比现有技术，本发明制冷机间隙密封结构的活塞主体为中空结构，活塞主体设有气孔及凹穴，凹穴位于活塞主体外表面，气孔贯穿活塞主体并且两端分别与活塞主体内部及凹穴连通，制冷机间隙密封结构还包括气体轴承及多孔体，气体轴承将多孔体按压在活塞主体内表面，活塞主体内的气体工质受气压流经气体轴承及多孔体从气孔及凹穴流出，使活塞主体及机身之间形成气膜间隙，形成密封，通过上述设计，在较小的耗气量状态下，提供足够多的气体轴承径向刚度，并保证密封性及润滑性。
附图说明
图1为本发明制冷机间隙密封结构的结构示意图；
图2为图1的制冷机间隙密封结构A处的放大图。
图中：10、机身；20、活塞主体；21、气孔；22、凹穴；30、气体轴承；40、多孔体；50、气膜间隙。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明的是，当组件被称为“固定于”另一个组件，它可以直接在另一个组件上或者也可以存在另一中间组件，通过中间组件固定。当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在另一中间组件。当一个组件被认为是“设置于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在另一中间组件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
请参阅图1至图2，本发明一种制冷机间隙密封结构包括机身10、活塞主体20、气体轴承30及多孔体40。
活塞主体20为中空结构，设有气孔21以及凹穴22。凹穴22位于活塞主体20的外表面，气孔21为通孔，一端与活塞主体20内部连通，另一端与凹穴22连通。活塞主体20外表面镀有工程塑料。在本实施例中，工程塑料为聚四氟乙烯。镀层厚度为35-45um。
气体轴承30采用双列8个小孔的轴承。多孔体40由超高分子量聚乙烯制成，孔隙率为30％-40％，厚度为0.35-0.75mm。多孔体40与活塞主体20内壁过盈配合，气体轴承30与多孔体40过盈配合将多孔体40按压在活塞主体20内壁上。活塞主体20收容于机身10并与机身10间隙配合。
活塞主体20内的气体工质处于高压状态，从气体轴承30及多孔体40流过，流经气孔21及凹穴22进入机身10与活塞主体20的间隙中，形成气膜间隙50，为活塞提供径向刚度。
通过上述设计，在较小的耗气量状态下，提供足够多的气体轴承径向刚度，并保证密封性及润滑性。
对本领域的技术人员来说，可根据以上描述的技术方案以及构思，做出其它各种相应的改变以及形变，而所有的这些改变以及形变都应该属于本发明权利要求的保护范围之内。

Claims (9)

1.一种制冷机间隙密封结构，包括机身及活塞主体，其特征在于：所述活塞主体为中空结构，所述活塞主体设有气孔及凹穴，所述凹穴位于所述活塞主体外表面，所述气孔贯穿所述活塞主体并且两端分别与所述活塞主体内部及所述凹穴连通，所述制冷机间隙密封结构还包括气体轴承及多孔体，所述气体轴承将所述多孔体按压在所述活塞主体内表面，所述活塞主体内的气体工质受气压流经所述气体轴承及所述多孔体从所述气孔及所述凹穴流出，使所述活塞主体及所述机身之间形成气膜间隙，形成密封。
2.根据权利要求1所述的制冷机间隙密封结构，其特征在于：所述活塞主体外表面镀有工程塑料。
3.根据权利要求2所述的制冷机间隙密封结构，其特征在于：所述工程塑料为聚四氟乙烯。
4.根据权利要求3所述的制冷机间隙密封结构，其特征在于：镀层厚度为35um-45um。
5.根据权利要求1所述的制冷机间隙密封结构，其特征在于：所述多孔体由超高分子量聚乙烯制成。
6.根据权利要求5所述的制冷机间隙密封结构，其特征在于：所述多孔体孔隙率为30％-40％。
7.根据权利要求5所述的制冷机间隙密封结构，其特征在于：所述多孔体厚度为0.35-0.75mm。
8.根据权利要求1所述的制冷机间隙密封结构，其特征在于：所述多孔体与所述活塞主体内壁过盈配合。
9.根据权利要求8所述的制冷机间隙密封结构，其特征在于：所述气体轴承与所述多孔体过盈配合。
CN201911129460.3A 2019-11-18 2019-11-18 一种制冷机间隙密封结构 Pending CN111058965A (zh)

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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 (ja) * 1981-12-16 1983-06-21 Aisin Seiki Co Ltd スタ−リング機関のシ−ルロツド
CN1421501A (zh) * 2002-12-19 2003-06-04 中国科学院兰州化学物理研究所 发动机活塞环用耐磨润滑涂料
CN108870792A (zh) * 2018-08-02 2018-11-23 杨厚成 一种声能制冷机装置

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 (ja) * 1981-12-16 1983-06-21 Aisin Seiki Co Ltd スタ−リング機関のシ−ルロツド
CN1421501A (zh) * 2002-12-19 2003-06-04 中国科学院兰州化学物理研究所 发动机活塞环用耐磨润滑涂料
CN108870792A (zh) * 2018-08-02 2018-11-23 杨厚成 一种声能制冷机装置

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