WO2021129427A1 - Palier combiné - Google Patents

Palier combiné Download PDF

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Publication number
WO2021129427A1
WO2021129427A1 PCT/CN2020/135894 CN2020135894W WO2021129427A1 WO 2021129427 A1 WO2021129427 A1 WO 2021129427A1 CN 2020135894 W CN2020135894 W CN 2020135894W WO 2021129427 A1 WO2021129427 A1 WO 2021129427A1
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WO
WIPO (PCT)
Prior art keywords
bearing
rotating shaft
stator
thrust
radial
Prior art date
Application number
PCT/CN2020/135894
Other languages
English (en)
Chinese (zh)
Inventor
靳普
刘慕华
Original Assignee
至玥腾风科技集团有限公司
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 至玥腾风科技集团有限公司 filed Critical 至玥腾风科技集团有限公司
Publication of WO2021129427A1 publication Critical patent/WO2021129427A1/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
    • F16C32/00—Bearings not otherwise provided for
    • 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

Definitions

  • the invention relates to the technical field of bearings, in particular to a combined bearing.
  • the DN value is a reference value for the selection of rolling bearing lubricants, where D is the bearing diameter and N is the relative speed of the inner and outer rings of the bearing. Bearings with a high DN value have higher requirements on the adhesion, working life, and working temperature of grease or oil, and the price of such grease or oil is usually higher.
  • the patent application No. 201480053353.6 entitled “Bearing device for turbocharger and manufacturing method of bearing device for turbocharger” provides a bearing device that is nested outside the ball bearing
  • the cylinder is equivalent to the oil film bearing, but the inner wall of the cylinder and the outer ring of the ball bearing are fixed, and the outer wall and the stator directly rotate relative to each other, which is equivalent to adding a protective sleeve to the outside of the ball bearing, but it does not change the bearing.
  • Relative speed still needs high-performance grease or lubricating oil.
  • the support function is achieved by the compressed air between the shaft and the inner ring of the bearing.
  • a rubber ring is installed between the outer diameter of the bearing and the bearing seat, relying on the rubber ring and the outer ring of the bearing.
  • the friction between the diameters fixes the bearing and prevents it from rotating in the circumferential direction.
  • the rotation speed of the rotating shaft reaches more than 100,000 revolutions, there will be air friction between the compressed air film and the rotating shaft, and this friction also increases with the increase of the rotating shaft speed.
  • the torque generated by the friction force makes the air bearing rotate more obviously and frequently with the rotating shaft.
  • the present invention provides a combined bearing, which can support the bearing in the radial direction to solve the wear problem, and can also limit the displacement of the rotating shaft in the axial direction.
  • the present invention adopts the following technical solutions.
  • a combined bearing including a radial bearing and a thrust bearing that are fixedly connected;
  • Radial bearings include rotating shaft bearings and stator bearings; the rotating shaft bearings are contact bearings, the rotating shaft bearings are sleeved on the rotating shaft, the stator bearings are non-contact bearings, the stator bearings are sleeved outside the rotating shaft bearings, and the stator bearings and the outer wall of the rotating shaft bearings are left There is a gap, and the stator bearing is fixed on the stator;
  • Thrust bearing includes foil, elastomer and thrust bearing housing; the thrust bearing housing is arranged outside the thrust plate, the thrust plate is fixed or integrally formed with the rotating shaft, the thrust bearing housing is sleeved on the rotating shaft, and the thrust bearing housing The inner end surface is fixed with a foil through an elastic body, a gap is left between the foil and the thrust plate, and a thrust bearing air inlet is arranged on the thrust bearing housing; the thrust bearing housing is fixed on the stator.
  • the foil is ring-shaped, and the outer diameter of the foil is larger than the outer diameter of the thrust plate.
  • the elastic body and the foil and the thrust bearing shell are all bonded.
  • the radial bearing also includes a radial bearing housing, the radial bearing housing is arranged on one end surface and the outer circumference of the stator bearing, the radial bearing housing and the thrust bearing housing are fixedly connected, and the stator bearing and The radial bearing housing and the thrust bearing housing are circumferentially fixed.
  • the outer peripheral surface of the stator bearing is provided with an air cavity, and the bottom of the air cavity is provided with an air hole.
  • One end of the air hole is connected to the air cavity, and the other end is connected to the gap between the stator bearing and the shaft bearing.
  • circumferential fixing mode between the stator bearing and the radial bearing housing and the thrust bearing housing is pin connection, pin connection or key connection.
  • the rotating shaft bearings are ball bearings, ceramic bearings or tetrafluoroethylene bearings, and the ball bearings can be single-row, double-row or multi-row ball bearings; the stator bearings are air bearings, oil film floating ring bearings or tilting pad bearings.
  • the rotating shaft bearing is a single-layer or multi-layer bearing.
  • the radial bearing further includes at least one intermediate bearing, the intermediate bearing is a contact bearing, the intermediate bearing is sleeved between the rotating shaft bearing and the stator bearing, and there is a gap between the stator bearing and the intermediate bearing.
  • the intermediate bearing is a ball bearing.
  • the intermediate bearing is a single-layer or multi-layer bearing.
  • the beneficial effects of the present invention are that the combined bearing of the present invention has low cost, can support the bearing in the radial direction, and can also limit the displacement of the rotating shaft in the axial direction; the surface of the foil bearing is flexible, with high bearing capacity, low friction and power consumption, The advantages of high stability, allowable bearing clearance loss, resistance to vibration and impact; the relative speed of each stage of the radial bearing is reduced, not limited by the theoretical DN value, and low dependence on lubricating oil.
  • an air film exists between the rotating shaft and the air bearing. As the speed of the rotating shaft further increases or the shaft diameter of the rotating shaft increases, the friction force further increases.
  • the air film exists between the outer ring of the rolling bearing and the air bearing. Because the speed of the outer ring of the rolling bearing is relatively small, the relative speed between the air film and the air bearing is relatively small, and the friction is small. Small, so the rubber ring between the air bearing and the bearing housing is not easy to wear and has a long service life.
  • the rotation speed of multiple radial bearings on the same rotating shaft can be adjusted adaptively, without artificial setting or adjustment of the rotation speed, and the effect of synchronous rotation can be achieved.
  • Fig. 1 is a schematic diagram of a composite bearing structure with foils arranged on both sides of a thrust plate according to an embodiment of the present invention
  • Figure 2 is a side view of the combined bearing structure of the first embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a composite bearing structure with a foil set on one side of a thrust plate according to an embodiment of the present invention
  • Fig. 5 is a structural schematic diagram of an integrated multi-layer bearing selected for the shaft bearing of the present invention.
  • Figure number 100-radial bearing, 101-rotating shaft bearing, 102-stator bearing, 103-rubber ring, 104-air cavity, 105-air hole, 106-radial bearing housing, 107-intermediate bearing, 108-diameter Air inlet to the bearing, 200-rotation shaft, 300-thrust disc, 400-thrust bearing, 401-foil, 402-elastomer, 403-thrust bearing inlet, 404-thrust bearing housing.
  • a combined bearing provided by the present invention is used to be installed on the rotating shaft 200 to support the rotating shaft 200 in the axial and radial directions.
  • the combined bearing includes a radial bearing 100 and a thrust bearing 400.
  • the radial bearing 100 includes a rotating shaft bearing 101 and a stator bearing 102; the thrust bearing 400 is arranged on the thrust plate 300; the thrust plate 300 is arranged on the rotating shaft 200, and the thrust plate 300 is connected to the rotating shaft.
  • the 200 is fixed as one piece or integrally formed.
  • the combined bearing of the present invention includes:
  • the radial bearing 100 includes a rotating shaft bearing 101 and a stator bearing 102.
  • the rotating shaft bearing 101 is a contact bearing, the rotating shaft bearing 101 is sleeved on the rotating shaft 200, the stator bearing 102 is a non-contact bearing, and the stator bearing 102 is sleeved outside the rotating shaft bearing 101.
  • the stator bearing 102 and the outer wall of the rotating shaft bearing 101 maintain a certain gap. .
  • the thrust bearing 400 includes a foil 401, an elastic body 402 and a thrust bearing housing 404; the thrust bearing housing 404 is arranged outside the thrust plate 300 and sleeved on the rotating shaft 200.
  • the two inner end faces (see Figure 1) or one inner end face (see Figure 3) of the thrust bearing housing 404 are fixed with foil 401 through an elastic body 402.
  • the elastic body 402 and the foil 401 and the thrust bearing housing 404 are both fixed. For bonding.
  • the foil 401 is ring-shaped.
  • the outer diameter of the foil 401 is larger than the outer diameter of the thrust plate 300.
  • the thrust bearing housing 404 is provided with a thrust bearing air inlet 403 for air intake. At this time, the airflow flows into the gap between the foil 401 and the thrust plate 300 to form an air film, which restricts the displacement of the rotating shaft 200 in the axial direction.
  • the radial bearing 100 also includes a radial bearing housing 106.
  • the radial bearing housing 106 is arranged on one end surface and the outer circumference of the stator bearing 102.
  • the radial bearing housing 106 and the thrust bearing housing 404 are fixed as a whole and are integrated with the stator. Fixed, the stator bearing 102 is circumferentially fixed with the radial bearing housing 106 and the thrust bearing housing 404.
  • the circumferential fixing method between the stator bearing 102 and the radial bearing housing 106 and the thrust bearing housing 404 is pin connection, pin connection or key connection.
  • the outer peripheral surface of the stator bearing 102 is provided with an air cavity 104.
  • the bottom of the air cavity 104 is provided with an air hole 105.
  • One end of the air hole 105 is connected to the air cavity 104, and the other end is connected to the gap between the stator bearing 102 and the rotating shaft bearing 101.
  • An apron 103 is also provided between the bearing housings 106, a radial bearing air inlet 108 is provided on the radial bearing housing 106, and the radial bearing air inlet 108 communicates with the air cavity 104.
  • the rotating shaft bearing 101 When the rotating shaft 200 starts, the rotating shaft bearing 101 outside the rotating shaft 200 contacts the bottom of the stator bearing 102. As the rotating shaft 200 rotates, the inner ring of the rotating shaft bearing 101 rotates. At the same time, the stator bearing 102 and the outer ring of the rotating shaft bearing 101 Due to the gradual separation of the air film or the oil film, the rotating shaft bearing 101 rotates eccentrically in the stator bearing 102. When the rotating shaft 200 runs stably and at a high speed, the rotating shaft 200 and the rotating shaft bearing 101 are coaxial and rotate eccentrically around a circle in the stator bearing 102. At the same time, the outer ring of the shaft bearing 101 rotates.
  • the shaft bearing 101 may further select ball bearings, ceramic bearings or tetrafluoroethylene bearings, and the ball bearings may select single-row, double-row or multi-row ball bearings; the stator bearing 102 may further select air bearings, Oil film floating ring bearing or tilting pad bearing.
  • a ball bearing is used as the rotating shaft bearing 101, and an air bearing is used as the stator bearing 102.
  • the rotating shaft 200 When the rotating shaft 200 rotates, it drives the inner ring of the ball bearing to rotate, and an air film is formed between the outer ring of the rolling bearing and the air bearing.
  • the air bearing is fixed on the stator and has a relative speed with the outer ring of the rolling bearing.
  • the inner ring speed of the ball bearing is set to V2
  • the outer ring speed is V1
  • the air bearing speed is V0
  • the air bearing is fixed on the stator
  • V0 is approximately
  • the radial bearing of the present invention is suitable for working conditions of large shaft diameter and high speed.
  • the radial bearing 100 includes a rotating shaft bearing 101, a stator bearing 102 and at least one intermediate bearing 107.
  • an intermediate bearing 107 is sleeved on the shaft bearing 101, or a plurality of intermediate bearings 107 are sleeved in sequence, and each intermediate bearing 107 is coaxial, and the stator bearing 102 is sleeved in the middle of the outermost periphery.
  • the bearing 107 is outside and a certain gap is maintained with the outer wall of the outermost middle bearing 107.
  • the intermediate bearing 107 is a ball bearing.
  • the outer ring of the intermediate bearing 107 contacts the bottom of the stator bearing 102.
  • the inner ring of the rotating shaft bearing 101 rotates.
  • the outer ring of the intermediate bearing 107 and the outer ring of the rotating shaft bearing 101 Due to the gradual separation of the air film or oil film, the rotating shaft 200 drives the rotating shaft bearing 101 and the intermediate bearing 107 to rotate eccentrically in the stator bearing 102.
  • the rotating shaft 200 runs stably and at a high speed
  • the rotating shaft 200, the rotating shaft bearing 101 and the intermediate bearing 107 are coaxial, and
  • the stator bearing 102 rotates eccentrically around a certain circle.
  • the outer ring of the rotating shaft bearing 101, the inner ring and the outer ring of each intermediate bearing 107 all rotate.
  • the shaft bearing 101 in the first embodiment is a single one, which can be a single-layer or multi-layer bearing, see Figure 5;
  • the shaft bearing 101 in the second embodiment is a single one, which can be a single layer or multiple layers, and the intermediate bearing is one or more It can be single-layer or multi-layer bearings, see Figure 5.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Support Of The Bearing (AREA)

Abstract

Un palier combiné comprend un palier radial (100) et un palier de butée (400) qui sont reliés à demeure, le palier radial (100) comprenant un palier d'arbre rotatif (101) et un palier de stator (102), le palier d'arbre rotatif (101) étant un palier de type à contact, le palier d'arbre rotatif (101) étant disposé sur un arbre rotatif (200) par emmanchement, le palier de stator (102) étant un palier de type sans contact, le palier de stator (102) étant disposé à l'extérieur du palier d'arbre rotatif (101) par emmanchement, un espace étant réservé entre le palier de stator (101) et la paroi externe du palier d'arbre rotatif (102), le palier de stator (101) étant fixé sur un stator, le palier de butée (400) comprenant une feuille (401), un corps élastique (402) et une coque de palier de butée (404), la coque de palier de butée (404) recouvrant un disque de poussée (300), le disque de poussée (300) étant fixé à l'arbre rotatif (200) ou formé d'un seul tenant avec lui, la coque de palier de butée (404) étant disposée sur l'arbre rotatif (200) par emmanchement, la face d'extrémité latérale interne de la coque de palier de butée (404) étant pourvue à demeure d'une feuille métallique (401) au moyen du corps élastique (402), un espace étant réservé entre la feuille métallique (401) et le disque de poussée (300), une entrée d'air de palier de butée (403) étant fournie dans la coque de palier de butée (404), et la coque de palier de butée (404) étant fixée sur le stator. Non seulement le palier combiné résout le problème d'usure dans la direction radiale du palier de support, mais il peut également limiter le déplacement d'arbre rotatif dans la direction axiale.
PCT/CN2020/135894 2019-12-23 2020-12-11 Palier combiné WO2021129427A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911339981.1 2019-12-23
CN201911339981.1A CN110925303A (zh) 2019-12-23 2019-12-23 一种组合轴承

Publications (1)

Publication Number Publication Date
WO2021129427A1 true WO2021129427A1 (fr) 2021-07-01

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PCT/CN2020/135894 WO2021129427A1 (fr) 2019-12-23 2020-12-11 Palier combiné

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CN (1) CN110925303A (fr)
WO (1) WO2021129427A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110925303A (zh) * 2019-12-23 2020-03-27 至玥腾风科技集团有限公司 一种组合轴承
CN111022491A (zh) * 2019-12-23 2020-04-17 至玥腾风科技集团有限公司 一种并联轴承转子系统、电机及电器
CN112128236B (zh) * 2020-09-21 2021-06-25 西安电子科技大学 一种滚滑径向-滑动止推的组合轴承
CN114688062A (zh) * 2020-12-25 2022-07-01 珠海格力电器股份有限公司 气悬浮压缩机的控制方法、装置、存储介质及压缩机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2268983A (en) * 1992-07-23 1994-01-26 Glacier Metal Co Ltd Magnetic bearing back-up
KR100851934B1 (ko) * 2007-06-25 2008-08-12 (주) 테크노라이즈 마그넷 구속력을 이용한 에어 베어링 스핀들
CN205744915U (zh) * 2016-05-04 2016-11-30 爱科腾博（大连）科技有限公司 复合式空气轴承
CN108886298A (zh) * 2016-05-25 2018-11-23 赛莱转子股份公司 电机和电机转子
CN110925303A (zh) * 2019-12-23 2020-03-27 至玥腾风科技集团有限公司 一种组合轴承
CN211778554U (zh) * 2019-12-23 2020-10-27 至玥腾风科技集团有限公司 一种组合轴承

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2268983A (en) * 1992-07-23 1994-01-26 Glacier Metal Co Ltd Magnetic bearing back-up
KR100851934B1 (ko) * 2007-06-25 2008-08-12 (주) 테크노라이즈 마그넷 구속력을 이용한 에어 베어링 스핀들
CN205744915U (zh) * 2016-05-04 2016-11-30 爱科腾博（大连）科技有限公司 复合式空气轴承
CN108886298A (zh) * 2016-05-25 2018-11-23 赛莱转子股份公司 电机和电机转子
CN110925303A (zh) * 2019-12-23 2020-03-27 至玥腾风科技集团有限公司 一种组合轴承
CN211778554U (zh) * 2019-12-23 2020-10-27 至玥腾风科技集团有限公司 一种组合轴承

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