WO2021132929A1 - Palier lisse ayant une structure réduisant le frottement - Google Patents

Palier lisse ayant une structure réduisant le frottement Download PDF

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Publication number
WO2021132929A1
WO2021132929A1 PCT/KR2020/017595 KR2020017595W WO2021132929A1 WO 2021132929 A1 WO2021132929 A1 WO 2021132929A1 KR 2020017595 W KR2020017595 W KR 2020017595W WO 2021132929 A1 WO2021132929 A1 WO 2021132929A1
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WO
WIPO (PCT)
Prior art keywords
housing
bearing
shaft
friction
present
Prior art date
Application number
PCT/KR2020/017595
Other languages
English (en)
Korean (ko)
Inventor
이연원
최윤환
박영규
전준호
김경환
Original Assignee
부경대학교 산학협력단
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.)
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Application filed by 부경대학교 산학협력단 filed Critical 부경대학교 산학협력단
Publication of WO2021132929A1 publication Critical patent/WO2021132929A1/fr

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    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/107—Grooves for generating pressure
    • 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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/46—Gap sizes or clearances

Definitions

  • the present invention relates to a journal bearing having a structure that reduces heat generation due to friction that occurs during bearing operation through a change in shape, alleviates viscosity change due to temperature rise, and reduces friction caused by an appropriate pressure.
  • a bearing moves with a pin and a shaft including frictional force, and a mechanical element in which a solid lubricant is embedded in the pin or shaft support layer (hereinafter referred to as the sliding layer) of the bearing or a lining or coating layer such as a non-ferrous alloy, ceramic, or synthetic resin composite is formed.
  • the sliding layer a mechanical element in which a solid lubricant is embedded in the pin or shaft support layer (hereinafter referred to as the sliding layer) of the bearing or a lining or coating layer such as a non-ferrous alloy, ceramic, or synthetic resin composite is formed.
  • the sliding layer a mechanical element in which a solid lubricant is embedded in the pin or shaft support layer (hereinafter referred to as the sliding layer) of the bearing or a lining or coating layer such as a non-ferrous alloy, ceramic, or synthetic resin composite is formed.
  • It is mainly used as a support part or a sliding part of the device in rotating industrial machines, guide posts of molds, and each joint
  • the joints of high-load rotary machines and construction machines are driven under a surface pressure condition of 1.8Mpa ⁇ 120Mpa when driven, and the driving speed has a large deviation of 0.2 cm/sec ⁇ 10 cm/sec. In addition, it does not have a uniform driving load and driving speed and continuously changes according to the working environment.
  • a sliding layer made of a single material is sometimes formed, but a plurality of materials formed of different types according to the shape and material of the supporting structure, dynamic and static pressure according to the sliding, etc. It is also formed by a layer of
  • a single material is formed in a form in which multiple layers are formed.
  • Lubricating oil and grease are used to improve lubrication properties to secure durability under complex and harsh driving conditions and reduce noise.
  • pores, grooves, or dimples have been formed in various shapes in the sliding layer and have been used.
  • the load bearing area is reduced by the groove or dimple, which increases the amount of wear, thereby reducing the durability life.
  • impurities cannot be captured, so foreign substances are mixed with grease or lubricant between the sliding layer and the pin or shaft, causing a decrease in durability or an increase in noise, and lubricating oil and Shorten the grease replenishment period or shorten the replacement cycle.
  • reinforcing particles or low-friction particles are mixed or it contains a fiber base material, but post-processing is performed to satisfy the high precision required by bearings. The breakage significantly reduces the physical properties.
  • Patent Document 0001 Republic of Korea Patent No. 10-1616015
  • Patent Document 0002 Republic of Korea Patent No. 10-1000428
  • an object of the present invention is to provide a journal bearing having a structure that reduces friction by reducing friction pressure generated during bearing operation through deformation of the bearing shape.
  • the present invention was created to improve the problems of the prior art as described above, as a bearing having a structure to reduce internal friction during operation, the bearing body providing a space in which the bearing operates; a housing that forms an outer side of the bearing body and is manufactured in a cylindrical shape and is provided with a fluid inlet in a portion thereof; a shaft manufactured in a shape corresponding to the inner side of the housing and rotatably coupled to the inner side of the housing; and a lubricating member formed as a groove having a set shape inside the housing to receive a lubricant to relieve frictional force with the shaft when the shaft rotates.
  • the lubricating member may be formed to be concave inwardly while forming a plurality of lubricating members with a set size and depth set inside the housing.
  • the lubricating member may receive the lubricant injected into the housing by being spaced apart from each other at a set interval inside the housing to prevent vaporization due to friction between the housing and the shaft.
  • the diameter of the lubricating member may be 2.5mm.
  • the thickness of the clearance between the housing and the shaft may be in the range of 20 ⁇ m to 180 ⁇ m.
  • the lubricant injected through the fluid inlet may spread as a whole in the housing while being accommodated between the lubricating members formed in the housing.
  • the lubricant circulates in the dimple structure as the lubricating member, which can prevent solid friction and boundary friction, which cause heat generation in the bearing.
  • the vapor fraction of the lubricant is directly related to the pressure applied to the bearing, the vapor fraction can be controlled by changing the set shape of the dimple structure, which is the lubricating member.
  • FIG. 1 is a conceptual diagram of a journal bearing having a structure for reducing friction according to an embodiment of the present invention.
  • FIG. 2 is a front view of the bearing of the present invention.
  • FIG. 3 is a conceptual diagram illustrating a state in which dimples are formed in the housing.
  • FIG. 4 is a conceptual diagram illustrating a cross-section of the housing.
  • FIG. 5 is a conceptual view illustrating a side surface of the housing.
  • FIG. 6 is a conceptual view showing a plane of the housing.
  • FIG. 7 is a view showing a comparison of the flow of lubricant injected into the bearing of the present invention when the dimple is not formed in the housing (a) and when the dimple is formed (b).
  • FIG. 8 is a graph illustrating a pressure comparison between a journal bearing and a general bearing having a structure for reducing friction according to an embodiment of the present invention.
  • first and second are for distinguishing one component from another, and the scope of rights should not be limited by these terms.
  • a first component may be termed a second component, and similarly, a second component may also be termed a first component.
  • a component When a component is referred to as being “connected” to another component, it may be directly connected to the other component, but it should be understood that other components may exist in between.
  • a certain element when it is mentioned that a certain element is "directly connected” to another element, it should be understood that the other element does not exist in the middle.
  • other expressions describing the relationship between elements that is, “between” and “immediately between” or “neighboring to” and “directly adjacent to”, etc., should be interpreted similarly.
  • FIG. 1 is a conceptual diagram of a journal bearing having a structure for reducing friction according to an embodiment of the present invention
  • FIG. 2 is a front view of the present bearing
  • FIG. 3 is a conceptual diagram showing a state in which dimples are formed in the housing
  • FIG. 4 is a conceptual diagram showing a cross section of the housing
  • FIG. 5 is a conceptual diagram showing a side surface of the housing
  • FIG. 6 is a conceptual diagram showing a plane of the housing
  • FIG. It is a view showing the flow in comparison with the case where the dimples are not formed (a) and the case where the dimples are formed (b)
  • FIG. 8 is a journal bearing having a structure for reducing friction according to an embodiment of the present invention and a general It is a graph showing the pressure comparison of bearings.
  • the present invention includes a bearing body 100, a housing 200, a shaft 300, and a lubricating member 400 can do.
  • the bearing body 100 may provide a space in which the bearing 10 operates.
  • the bearing body 100 is a component including a bearing 10 that fixes the shaft of the rotating machine at a fixed position, and rotates the shaft while supporting the weight of the shaft and the load applied to the shaft. to be.
  • the housing 200 may form the outside of the bearing body 100 and may be manufactured in a cylindrical shape, and may have a structure in which a fluid inlet 50 is provided in a portion thereof.
  • the shaft 300 may be manufactured in a shape corresponding to the inner side of the housing 200 and rotatably coupled to the inner side of the housing 200 . Specifically, the shaft 300 may rotate at 2000 rpm.
  • the bearing body 100 has a shaft 300 with a diameter of 49.8 mm in the center, and a housing 200 that is a bearing having a diameter of 50 mm on the outside, and is formed above the housing 200 .
  • a lubricant flows from the fluid inlet 50 .
  • a lubricant may enter from the fluid inlet 50 at a pressure of 101 kPa.
  • the lubricating member 400 is formed as a groove in a shape set inside the housing 200 , so that the lubricant can be accommodated and relieved when the shaft 300 rotates.
  • the lubricating member 400 may be formed concave inwardly while forming a plurality of lubricating members 400 with a set size and depth inside the housing 200 at a set interval.
  • the lubricating member 400 can accommodate the lubricant injected into the housing 200 by being spaced apart from each other at a set interval inside the housing 200 to prevent vaporization due to friction between the housing 200 and the shaft 300 . . Specifically, since the lubricant is accommodated in the lubricating member 400 that is the dimple as described above, cavitation can be prevented and frictional force can be reduced. Cavitation is a phenomenon in which a minute part of a liquid is vaporized while surrounded by a liquid, also called cavitation or cavitation. Occurs when the static pressure of the liquid becomes less than the vapor pressure of the liquid on a part of the solid surface when the relative velocities of the object and the liquid are very large. It occurs in the impeller of a pump and the screw of a ship. When cavitation occurs, the increase in friction force decreases performance and in some cases damage.
  • the diameter of the lubricating member 400 may be 2.5 mm.
  • the lubricating member 400 may be a kind of dimple, and may have a diameter of 2.5 mm and 28 lines of 7 each, but it is not necessary to be limited thereto and may be changed according to circumstances.
  • the thickness of the clearance between the housing 200 and the shaft 300 may be in the range of 20 ⁇ m to 180 ⁇ m.
  • the lubricant injected through the fluid inlet 50 may spread as a whole in the housing 200 while being accommodated between the lubricating members 400 formed in the housing.
  • FIG. 7 shows the fraction of oil vapor to oil in liquid state, and the lubricant, which is liquid oil entering from the fluid inlet 50 , is gas due to the cavitation effect due to the rotation of the shaft 300 , which is an axis. state of the oil.
  • the lubricant circulates in the dimple structure that is the lubricating member 400 , which can prevent solid friction and boundary friction that cause heat generation in the bearing 10 .
  • the vapor fraction of the lubricant is directly related to the pressure applied to the bearing 10
  • the vapor fraction can be controlled by changing the set shape of the dimple structure, which is the lubricating member 400.
  • lubricant circulates in the dimple structure, which is a lubricating member, which prevents solid friction and boundary friction, which cause heat generation in the bearing, and excessive pressure inside the bearing causes fatigue failure.
  • the pressure can be dramatically reduced, so it has industrial applicability.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

La présente invention se rapporte à un palier ayant une structure réduisant le frottement interne pendant le fonctionnement, le palier étant caractérisé en ce qu'il comprend : un corps principal de palier fournissant un espace pour que le palier fonctionne ; un boîtier formant un côté externe du corps principal de palier, fabriqué sous une forme cylindrique, et ayant un orifice d'injection de fluide dans une partie de celui-ci ; un arbre fabriqué sous une forme correspondant à l'intérieur du boîtier et couplé en rotation à l'intérieur du boîtier ; et un élément de lubrification formé sous la forme d'une dépression dans une forme définie à l'intérieur du boîtier et recevant un lubrifiant pour réduire une force de frottement avec l'arbre lorsque l'arbre est mis en rotation.
PCT/KR2020/017595 2019-12-27 2020-12-04 Palier lisse ayant une structure réduisant le frottement WO2021132929A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020190176876A KR20210084009A (ko) 2019-12-27 2019-12-27 마찰을 감소시키는 구조를 갖는 저널 베어링
KR10-2019-0176876 2019-12-27

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WO2021132929A1 true WO2021132929A1 (fr) 2021-07-01

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PCT/KR2020/017595 WO2021132929A1 (fr) 2019-12-27 2020-12-04 Palier lisse ayant une structure réduisant le frottement

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WO (1) WO2021132929A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003509633A (ja) * 1999-09-14 2003-03-11 アトラス コプコ エアーパワー，ナームローゼ フェンノートシャップ ラジアル−アキシアル複合すべり軸受け
KR100454659B1 (ko) * 1996-01-30 2005-08-09 페데랄-모굴 비스바덴 게엠베하 운트 코. 카게 윤활유포켓들을구비하는미끄럼베어링요소
KR20120003693U (ko) * 2010-11-18 2012-05-29 에스티엑스메탈 주식회사 베어링의 오일 공급구조
KR20180013209A (ko) * 2016-07-29 2018-02-07 현대위아 주식회사 가변 형상 터보차저용 저널 베어링
CN209245082U (zh) * 2018-11-09 2019-08-13 浙江万龙轴瓦有限公司 一种新型轴瓦

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4504409B2 (ja) 2007-10-10 2010-07-14 大同メタル工業株式会社 すべり軸受
KR101616015B1 (ko) 2015-02-16 2016-04-27 유준일 끊어지지 않는 복합소재 섬유층을 포함하는 부시 베어링 및 슬라이딩 베어링

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100454659B1 (ko) * 1996-01-30 2005-08-09 페데랄-모굴 비스바덴 게엠베하 운트 코. 카게 윤활유포켓들을구비하는미끄럼베어링요소
JP2003509633A (ja) * 1999-09-14 2003-03-11 アトラス コプコ エアーパワー，ナームローゼ フェンノートシャップ ラジアル−アキシアル複合すべり軸受け
KR20120003693U (ko) * 2010-11-18 2012-05-29 에스티엑스메탈 주식회사 베어링의 오일 공급구조
KR20180013209A (ko) * 2016-07-29 2018-02-07 현대위아 주식회사 가변 형상 터보차저용 저널 베어링
CN209245082U (zh) * 2018-11-09 2019-08-13 浙江万龙轴瓦有限公司 一种新型轴瓦

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