WO2023279586A1 - 一种空气悬浮轴向轴承及氢能源压缩机 - Google Patents

一种空气悬浮轴向轴承及氢能源压缩机 Download PDF

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Publication number
WO2023279586A1
WO2023279586A1 PCT/CN2021/127221 CN2021127221W WO2023279586A1 WO 2023279586 A1 WO2023279586 A1 WO 2023279586A1 CN 2021127221 W CN2021127221 W CN 2021127221W WO 2023279586 A1 WO2023279586 A1 WO 2023279586A1
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WIPO (PCT)
Prior art keywords
foil
radial
bearing
air suspension
fixing
Prior art date
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PCT/CN2021/127221
Other languages
English (en)
French (fr)
Inventor
钟仁志
袁军
项懂欣
Original Assignee
鑫磊压缩机股份有限公司
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Priority claimed from CN202110767706.0A external-priority patent/CN113482965B/zh
Application filed by 鑫磊压缩机股份有限公司 filed Critical 鑫磊压缩机股份有限公司
Publication of WO2023279586A1 publication Critical patent/WO2023279586A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/051—Axial thrust balancing
    • F04D29/0513—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps

Definitions

  • the invention relates to the field of air suspension axial bearings, in particular to an air suspension axial bearing and a hydrogen energy compressor.
  • Aerodynamic pressure bearing is one of the sliding bearings. Its structure and working principle are similar to liquid sliding bearings. The difference is that gas (mostly air) is used as the lubricating medium. It can be used in high-speed machines, instruments or radioactive devices due to its wide temperature range and low load-carrying capacity.
  • gas mostly air
  • Chinese Utility Model Patent Application (Publication No. CN111664188B, Publication Date: 20210601) discloses an aerodynamic bearing and bearing assembly, including a ring-shaped bearing seat, and a support assembly arranged on the end surface of the bearing seat.
  • the support assembly includes an arch foil and a top foil, the arch foil is arranged between the top foil and the bearing seat, and is used to provide support for the top foil, and the top foil includes a The flat part arranged parallel to the end face of the bearing seat, and the inclined part formed at an angle with the end face of the bearing seat, the end of the planar part away from the inclined part is a fixed end, and the fixed end is fixedly connected to the bearing seat
  • the end of the inclined portion away from the flat portion is a free end, which can slide along the end surface of the bearing seat
  • the support assembly also includes a limiting structure, and the limiting structure is fixedly arranged relative to the bearing seat , used to limit the free end of the top foil in the axial direction of the bearing seat.
  • the existing technology has the following disadvantages: the bottom foils of the two supporting devices are respectively locked and fixed to the first fixing plate and the second fixing plate by screws, and the bottom foils are relatively thin, and are prone to deformation when locked; thus causing the bearing
  • the surface is uneven in the axial direction, which affects the formation of air models on the bearing surface and reduces the service life of the bearing.
  • the purpose of the present invention is: to solve the above problems, it is proposed to use positioning pins to be embedded in the pin grooves of the bottom foil to limit the assembly of the bottom foil, corrugated foil and top foil, so as to avoid deformation of the bottom foil when the screws are locked to the bottom foil
  • An air-suspended axial bearing and a hydrogen energy compressor that are conducive to the formation of an air model on the bearing surface and improve the service life of the bearing.
  • An air suspension axial bearing the bearing includes a first fixed plate, a second fixed plate, a support device and a positioning pin; the two support devices are arranged oppositely and are respectively located on the oppositely arranged first fixed plate and the second fixed plate;
  • the support device includes a bottom foil, a corrugated foil and a top foil.
  • a plurality of pin slots axially penetrating and aligned with the pin holes are provided; the positioning pins pass through the pin slots of the two supporting devices, and their two ends are respectively embedded in the pin holes on the first fixing plate and the second fixing plate.
  • the pin groove is an open groove.
  • the four pin slots are arranged opposite to each other, and the connecting lines of the pin slots arranged opposite to each other are perpendicular to each other.
  • both the first fixing plate and the second fixing plate are provided with limiting grooves, and the pin holes penetrate through the limiting grooves in the axial direction.
  • the air suspension axial bearing is also provided with a plurality of adjustment shims, the plurality of adjustment shims have the same shape as the bottom foil and are stacked and distributed in the axial direction; the plurality of adjustment shims are respectively located at the bottom of the supporting device on the first fixed plate Between the outer side of the foil and the first fixed plate, between the outer side of the bottom foil of the support means on the second fixed plate and the second fixed plate.
  • the top foil is provided with a PTFE coating on the surface facing away from the bump foil.
  • the invention also discloses an air-suspension axial bearing device, which includes an air-suspension axial bearing and a thrust disc, and the thrust disc is located between two supporting devices.
  • the present invention also discloses a hydrogen energy compressor, including a motor barrel, a motor stator, a motor shaft, an air suspension radial bearing, an air suspension axial bearing, and an axial thrust plate;
  • the motor stator is fixedly embedded in the motor barrel , the motor shaft is provided with a motor rotor, and the motor rotor is aligned with the motor stator;
  • two air-suspended radial bearings are sleeved at both ends of the motor shaft to provide support and limit the motor shaft in the radial direction;
  • the axial thrust disc fixed sleeve Located on the motor shaft, the supporting parts of the air suspension axial bearing are located on both sides of the axial thrust disc, and are used for axially limiting the axial thrust disc.
  • the air-suspension radial bearing includes a bearing seat, a radial wave foil, a middle foil, a radial top foil and locking screws;
  • the bearing seat is provided with a bearing hole, a fixing groove and a screw hole, and the radial wave foil, the middle foil and the
  • the radial top foils are all in the shape of an open ring;
  • the radial wave foil is fixedly sleeved on the outer wall of the middle foil, the middle foil is sleeved on the outer wall of the radial top foil, and the outer wall of the radial wave foil is embedded in the bearing hole;
  • the middle foil Both the radial top foil and the radial top foil are provided with fixing parts protruding from their respective outer walls on one side of their respective opening ends, and the fixing parts of the middle foil and the radial top foil pass through the opening ends of the radial corrugated foils and are attached to each other.
  • the fixing part of the middle foil and the fixing part of the radial top foil are both fitted in the fixing groove, the locking screw is screwed into the screw hole, and its top is in contact with the bottom surface of the fixing part of the middle foil to connect the middle foil and the radial
  • the fixing part of the top foil is pressed into the fixing groove.
  • the tightening and fixing direction of the locking screw is the same as the rotation direction of the motor shaft supported by the air suspension radial bearing.
  • a plurality of positioning pins pass through the pin grooves 12 of the two support devices 3 to limit the radial direction thereof, so that when the motor shaft is prevented from rotating, the support device follows the rotation of the thrust plate driven by the motor shaft; when the motor shaft speed reaches a certain level, the support An air film is formed between the device and the thrust plate, thereby separating them to achieve the effect of suspension; compared with screw locking and fixing the bottom foil, the positioning pin limit method does not provide pressing force on the surface of the bottom foil, and will not cause it to be pressed Tight deformation; so that the bearing surface will not be uneven in the axial direction, which is conducive to the formation of an air model between the bearing surface and the motor shaft, and improves the service life of the bearing.
  • Fig. 1 is a structural schematic diagram of the present invention.
  • Fig. 2 is a structural schematic diagram of the supporting device.
  • Fig. 3 is a schematic structural diagram of a hydrogen energy compressor.
  • Fig. 4 and Fig. 5 are structural schematic diagrams of air suspension radial bearings.
  • the bearing includes a first fixed plate 1, a second fixed plate 2, a support device 3 and a positioning pin 4;
  • the support device 3 includes a bottom foil 31, a corrugated foil 32 and a top foil 33, and the corrugated foil 32 is located between the bottom foil 31 and the top foil 33 in the axial direction and three
  • the first fixed plate 1 and the second fixed plate 2 are provided with pin holes 11 opposite to each other, and the bottom foil 31 is provided with a plurality of pin grooves 12 axially penetrating and aligned with the pin holes 11; the positioning pins 4 pass through Pass through the pin slots 12 of the two supporting devices 3, and the two ends of the pin holes 11 on the first fixing plate 1 and the second fixing plate 2 are inserted respectively.
  • a plurality of positioning pins 4 pass through the pin slots 12 of the two supporting devices 3 to limit the radial direction thereof, so that when the motor shaft is prevented from rotating, the supporting device 3 rotates with the thrust plate driven by the motor shaft;
  • the shaft speed reaches a certain level, an air film is formed between the support device 3 and the thrust plate, thereby separating them and achieving the effect of suspension; compared with the screw locking and fixing the bottom foil 31, the positioning pin 4 is not in the position of the bottom foil 31 surface.
  • the compression force is provided without causing it to be compressed and deformed; thus, it will not cause the bearing surface to be uneven in the axial direction, which is conducive to the formation of an air model between the bearing surface and the motor shaft, and improves the service life of the bearing.
  • the pin groove 12 is an open groove.
  • the four pin slots 12 are arranged in pairs, and the connecting lines of the pin slots 12 arranged in pairs are perpendicular to each other so as to realize the limitation of the supporting device 3 in the vertical radial direction and the left and right radial direction.
  • Both the first fixing plate 1 and the second fixing plate 2 are provided with limiting grooves 13 , and the pin holes 11 pass through the limiting grooves 13 in the axial direction.
  • the air-suspension axial bearing is also provided with a plurality of adjusting shims 5, which have the same shape as the bottom foil 31 and are stacked and distributed in the axial direction; the plurality of adjusting shims 5 are respectively located on the first fixing plate 1 to support the device Between the outer side of the bottom foil 31 of 3 and the first fixed plate 1, and between the outer side of the bottom foil 31 of the supporting device 3 on the second fixed plate 2 and the second fixed plate 2.
  • the gap between the thrust plate and the top foil 33 of the air suspension axial bearing can be adjusted, and the gap between the impeller and the first fixed plate 1 can be adjusted to improve the efficiency of the impeller.
  • the impeller is fixedly connected on the motor shaft and is used for blowing air.
  • the top foil 33 is provided with a PTFE coating on the surface away from the corrugated foil 32, and the surface of the thrust disc is coated with PVD.
  • the friction coefficient between the two is low and the temperature resistance is high; thereby ensuring the service life of the air suspension axial bearing.
  • An air-suspension axial bearing device includes an air-suspension axial bearing and a thrust disc 6 , and the thrust disc 6 is located between two supporting devices 3 .
  • a hydrogen energy compressor as shown in Figure 3 includes a motor barrel 61, a motor stator 62, a motor shaft 620, an air suspension radial bearing 63, an air suspension axial bearing 64 and an axial thrust plate 65; the motor stator 62 is fixed Embedded in the motor barrel 61, the motor shaft 620 is provided with a motor rotor, and the motor rotor is aligned with the motor stator 62; two air-suspended radial bearings 63 are sleeved on both ends of the motor shaft 620 for aligning the motor shaft in the radial direction.
  • the axial thrust plate 65 is fixedly sleeved on the motor shaft 620, and the supporting parts of the air suspension axial bearing 64 are located on both sides of the axial thrust plate 65, which are used to axially limit the axial thrust plate 65 .
  • the air suspension radial bearing 63 includes a bearing seat 71, a radial wave foil 72, a middle foil 73, a radial top foil 74 and a locking screw 75;
  • the bearing seat 71 is provided with a bearing hole 711,
  • the fixing groove 712 and the screw hole 713, the radial wave foil 72, the middle foil 73 and the radial top foil 74 are all in the shape of an open ring;
  • the radial wave foil 72 is fixedly sleeved on the outer wall of the middle foil 73, and the middle foil 73 is sleeved On the outer wall of the radial top foil 74, and the outer wall of the radial wave foil 72 is embedded in the bearing hole 711;
  • the middle foil 73 and the radial top foil 74 are provided with fixing parts protruding from their respective outer walls on the side of their respective opening ends 741, the fixing part 741 of the middle foil 73 and the fixing part 741 of the radial top
  • the assembly of the radial wave foil 72, the middle foil 73 and the radial top foil 74 is pressed into the fixing groove 712 by the top of the locking screw 75.
  • the radial wave foil 72, the middle foil 73 or the radial When the top foil 74 is damaged and needs to be replaced, it is only necessary to remove the locking screw 75 to disassemble the assembly of the radial wave foil 72, the middle foil 73 and the radial top foil 74, without replacing the bearing seat 71; Thereby reducing the number of parts that need to be replaced and reducing the maintenance cost of the bearing.
  • the tightening and fixing direction of the locking screw 75 is the same as the rotation direction of the motor shaft 620 supported by the air suspension radial bearing.
  • the locking screw 75 when the locking screw 75 is pressed against the combination of the radial wave foil 72, the middle foil 73 and the radial top foil 74, it will not be subjected to the force in the opposite direction provided by the motor shaft 620, which is beneficial to keep the locking screw 75 tight. solid effect.

Abstract

一种空气悬浮轴向轴承及氢能源压缩机，轴承包括第一固定板（1）、第二固定板（2）、支撑装置（3）和定位销（4）；两个支撑装置（3）相对设置并且分别位于相对设置的第一固定板（1）和第二固定板（2）上；支撑装置（3）包括底箔（31）、波箔（32）和顶箔（33），波箔（32）在轴向位于底箔（31）和顶箔（33）之间并且三者固定连接；第一固定板（1）和第二固定板（2）上设置有销钉孔（11），底箔（31）上设置有多个销钉槽（12）；定位销（4）穿过两个支撑装置（3）的销钉槽（12），并且其两端分别嵌入第一固定板（1）和第二固定板（2）上的销钉孔（11）。

Description

一种空气悬浮轴向轴承及氢能源压缩机 技术领域
本发明涉及空气悬浮轴向轴承领域，尤其涉及一种空气悬浮轴向轴承及氢能源压缩机。
 背景技术
空气动压轴承是滑动轴承形式当中的一种，其结构和工作原理与液体滑动轴承类似，不同的是采用气体（多为空气）作为润滑介质，由于其摩阻极低、适用速度范围大、适用温度范围广、承载能力低等诸多优点，因而可用于高速机器、仪器或放射性装置中。
中国实用新型专利申请（公开号CN111664188B，公开日：20210601）公开了一种空气动压轴承及轴承组件，包括圆环状结构的轴承座，和设置在所述轴承座的端面上的支撑组件，所述支撑组件包括拱箔和顶箔，所述拱箔设置在所述顶箔和所述轴承座之间，用于对所述顶箔提供支撑力，所述顶箔包括与所述轴承座的端面平行设置的平面部，和与所述轴承座的端面形成夹角设置的斜面部，所述平面部远离所述斜面部的一端为固定端，所述固定端固定连接到所述轴承座上，所述斜面部远离所述平面部的一端为自由端，能够沿着所述轴承座的端面滑动，所述支撑组件还包括限位结构，所述限位结构相对所述轴承座固定设置，用于在所述轴承座的轴向上对所述顶箔的自由端进行限位。本发明提高了轴承的刚度和可靠性。
 技术问题
现有技术存在以下不足：通过螺钉将两个支撑装置的底箔分别锁紧固定至第一固定板和第二固定板，而底箔较薄，在锁紧固定时容易发生变形；从而造成轴承表面在轴向高低不平，进而影响轴承表面形成气模，降低了轴承的使用寿命。
 技术解决方案
本发明的目的是：针对上述问题，提出采用定位销嵌入底箔的销钉槽进而对底箔、波箔和顶箔的组合件进行限位，从而避免螺钉对底箔锁紧时造成底箔变形的情况；有利于轴承表面形成气模，提高轴承的使用寿命的一种空气悬浮轴向轴承及氢能源压缩机。
为了实现上述的目的，本发明采用了以下的技术方案：
一种空气悬浮轴向轴承，该轴承包括第一固定板、第二固定板、支撑装置和定位销；两个支撑装置相对设置并且分别位于相对设置的第一固定板和第二固定板上；支撑装置包括底箔、波箔和顶箔，波箔在轴向位于底箔和顶箔之间并且三者固定连接；第一固定板和第二固定板上相对设置有销钉孔，底箔上设置有轴向贯穿并且与销钉孔相对齐的多个销钉槽；定位销穿过两个支撑装置的销钉槽，并且其两端分别嵌入第一固定板和第二固定板上的销钉孔。
作为优选，销钉槽为开口槽。
作为优选，四个销钉槽两两相对设置，并且两两相对设置的销钉槽的连线相互垂直。
作为优选，第一固定板和第二固定板都设置有限位槽，销钉孔在轴向贯穿限位槽。
作为优选，空气悬浮轴向轴承还设置有多个调整垫片，多个调整垫片与底箔形状相同并且在轴向堆叠分布；多个调整垫片分别位于第一固定板上支撑装置的底箔外侧和第一固定板之间、第二固定板上支撑装置的底箔外侧和第二固定板之间。
作为优选，顶箔在远离波箔的表面上设置有PTFE涂层。
另外，本发明还公开了一种空气悬浮轴向轴承装置，包括空气悬浮轴向轴承和推力盘，推力盘位于两个支撑装置之间。
另外，本发明还公开了一种氢能源压缩机，包括电机筒、电机定子、电机轴、空气悬浮径向轴承、空气悬浮轴向轴承和轴向推力盘；电机定子固定嵌设在电机筒内，电机轴设置有电机转子，电机转子与电机定子相对齐；两个空气悬浮径向轴承套设在电机轴两端，用于对电机轴在径向提供支撑限位；轴向推力盘固定套设在电机轴上，空气悬浮轴向轴承的支撑部位位于轴向推力盘两侧，用于对轴向推力盘进行轴向限位。
作为优选，空气悬浮径向轴承包括轴承座、径向波箔、中箔、径向顶箔和锁紧螺钉；轴承座设置有轴承孔、固定槽和螺钉孔，径向波箔、中箔和径向顶箔都为开口的圆环形状；径向波箔固定套设在中箔外壁，中箔套设在径向顶箔外壁，并且径向波箔外壁嵌设于轴承孔内；中箔和径向顶箔在各自的开口端一侧都设置有凸出于各自外壁的固定部，中箔的固定部和径向顶箔的固定部都穿过径向波箔的开口端并且相互贴合；中箔的固定部和径向顶箔的固定部都嵌合于固定槽中，锁紧螺钉旋合于螺钉孔，并且其顶端与中箔的固定部底面相接触将中箔和径向顶箔的固定部压紧在固定槽内。
作为优选，锁紧螺钉的压紧固定方向与空气悬浮径向轴承所支撑的电机轴的转动方向相同。
 有益效果
本发明采用上述技术方案的一种空气悬浮轴向轴承及氢能源压缩机的优点是：
多个定位销穿过两个支撑装置3的销钉槽12进而对其径向进行限位，防止电机轴转动时，支撑装置跟随电机轴带动的推力盘转动；当电机轴转速达到一定程度，支撑装置与推力盘之间形成气膜，从而使其分离，达到悬浮的效果；与螺钉锁紧固定底箔相比，定位销限位方式不对底箔表面提供压紧力，不会导致其被压紧变形；从而不会造成轴承表面在轴向高低不平，进而有利于轴承表面与电机轴之间形成气模，提高了轴承的使用寿命。
 附图说明
图1为本发明的结构示意图。
图2为支撑装置的结构示意图。
图3为氢能源压缩机的结构示意图。
图4、图5为空气悬浮径向轴承的结构示意图。
L1-锁紧螺钉紧固方向、L2-内转轴转动方向。
 本发明的最佳实施方式
如图1、图2所示的一种空气悬浮轴向轴承，该轴承包括第一固定板1、第二固定板2、支撑装置3和定位销4；两个支撑装置3相对设置并且分别位于相对设置的第一固定板1和第二固定板2上；支撑装置3包括底箔31、波箔32和顶箔33，波箔32在轴向位于底箔31和顶箔33之间并且三者固定连接；第一固定板1和第二固定板2上相对设置有销钉孔11，底箔31上设置有轴向贯穿并且与销钉孔11相对齐的多个销钉槽12；定位销4穿过两个支撑装置3的销钉槽12，并且其两端分别嵌入第一固定板1和第二固定板2上的销钉孔11。此种方式中，多个定位销4穿过两个支撑装置3的销钉槽12进而对其径向进行限位，防止电机轴转动时，支撑装置3跟随电机轴带动的推力盘转动；当电机轴转速达到一定程度，支撑装置3与推力盘之间形成气膜，从而使其分离，达到悬浮的效果；与螺钉锁紧固定底箔31相比，定位销4限位方式不对底箔31表面提供压紧力，不会导致其被压紧变形；从而不会造成轴承表面在轴向高低不平，进而有利于轴承表面与电机轴之间形成气模，提高了轴承的使用寿命。
销钉槽12为开口槽。四个销钉槽12两两相对设置，并且两两相对设置的销钉槽12的连线相互垂直从而实现对支撑装置3在上下径向方向和左右径向方向的限位。
第一固定板1和第二固定板2都设置有限位槽13，销钉孔11在轴向贯穿限位槽13。空气悬浮轴向轴承还设置有多个调整垫片5，多个调整垫片5与底箔31形状相同并且在轴向堆叠分布；多个调整垫片5分别位于第一固定板1上支撑装置3的底箔31外侧和第一固定板1之间、第二固定板2上支撑装置3的底箔31外侧和第二固定板2之间。通过调整垫片5的个数可以调整推力盘与空气悬浮轴向轴承的顶箔33之间的间隙，以及调整叶轮与第一固定板1之间的间隙，提高叶轮效率。其中叶轮固定连接在电机轴上，并且用于鼓风。
顶箔33在远离波箔32的表面上设置有PTFE涂层，推力盘表面具有PVD涂层，两者之间摩擦系数低，且耐温高；从而保证了空气悬浮轴向轴承的使用寿命。
一种空气悬浮轴向轴承装置，包括空气悬浮轴向轴承和推力盘6，推力盘6位于两个支撑装置3之间。
如图3所示的一种氢能源压缩机，包括电机筒61、电机定子62、电机轴620、空气悬浮径向轴承63、空气悬浮轴向轴承64和轴向推力盘65；电机定子62固定嵌设在电机筒61内，电机轴620设置有电机转子，电机转子与电机定子62相对齐；两个空气悬浮径向轴承63套设在电机轴620两端，用于对电机轴在径向提供支撑限位；轴向推力盘65固定套设在电机轴620上，空气悬浮轴向轴承64的支撑部位位于轴向推力盘65两侧，用于对轴向推力盘65进行轴向限位。
如图4、图5所示，空气悬浮径向轴承63包括轴承座71、径向波箔72、中箔73、径向顶箔74和锁紧螺钉75；轴承座71设置有轴承孔711、固定槽712和螺钉孔713，径向波箔72、中箔73和径向顶箔74都为开口的圆环形状；径向波箔72固定套设在中箔73外壁，中箔73套设在径向顶箔74外壁，并且径向波箔72外壁嵌设于轴承孔711内；中箔73和径向顶箔74在各自的开口端一侧都设置有凸出于各自外壁的固定部741，中箔73的固定部和径向顶箔74的固定部741都穿过径向波箔72的开口端并且相互贴合；中箔73的固定部和径向顶箔74的固定部741都嵌合于固定槽712中，锁紧螺钉75旋合于螺钉孔713，并且其顶端与中箔73的固定部741底面相接触将中箔73和径向顶箔74的固定部741压紧在固定槽712内。此种方式中，径向波箔72、中箔73和径向顶箔74的组合件通过锁紧螺钉75顶端压紧在固定槽712内，当径向波箔72、中箔73或径向顶箔74发生损坏需要更换时，只需要卸掉锁紧螺钉75将径向波箔72、中箔73和径向顶箔74的组合件拆卸即可，而不需要对轴承座71进行更换；从而减少了需要更换零件的数量，降低了轴承的维护成本。
锁紧螺钉75的压紧固定方向与空气悬浮径向轴承所支撑的电机轴620的转动方向相同。从而使得锁紧螺钉75压紧径向波箔72、中箔73和径向顶箔74的组合件时不会受到电机轴620提供的相反方向的作用力，有利于保持锁紧螺钉75的紧固效果。

Claims (10)

  1. 一种空气悬浮轴向轴承，其特征在于，该轴承包括第一固定板（1）、第二固定板（2）、支撑装置（3）和定位销（4）；两个支撑装置（3）相对设置并且分别位于相对设置的第一固定板（1）和第二固定板（2）上；支撑装置（3）包括底箔（31）、波箔（32）和顶箔（33），波箔（32）在轴向位于底箔（31）和顶箔（33）之间并且三者固定连接；第一固定板（1）和第二固定板（2）上相对设置有销钉孔（11），底箔（31）上设置有轴向贯穿并且与销钉孔（11）相对齐的多个销钉槽（12）；定位销（4）穿过两个支撑装置（3）的销钉槽（12），并且其两端分别嵌入第一固定板（1）和第二固定板（2）上的销钉孔（11）。
  2. 根据权利要求1所述一种空气悬浮轴向轴承，其特征在于，销钉槽（12）为开口槽。
  3. 根据权利要求1所述一种空气悬浮轴向轴承，其特征在于，四个销钉槽（12）两两相对设置，并且两两相对设置的销钉槽（12）的连线相互垂直。
  4. 根据权利要求1所述一种空气悬浮轴向轴承，其特征在于，第一固定板（1）和第二固定板（2）都设置有限位槽（13），销钉孔（11）在轴向贯穿限位槽（13）。
  5. 根据权利要求1所述一种空气悬浮轴向轴承，其特征在于，空气悬浮轴向轴承还设置有多个调整垫片（5），多个调整垫片（5）与底箔（31）形状相同并且在轴向堆叠分布；多个调整垫片（5）分别位于第一固定板（1）上支撑装置（3）的底箔（31）外侧和第一固定板（1）之间、第二固定板（2）上支撑装置（3）的底箔（31）外侧和第二固定板（2）之间。
  6. 根据权利要求1所述一种空气悬浮轴向轴承，其特征在于，顶箔（33）在远离波箔（32）的表面上设置有PTFE涂层。
  7. 一种空气悬浮轴向轴承装置，其特征在于，包括空气悬浮轴向轴承和推力盘（6），空气悬浮轴向轴承如权利要求1-6任意一项所述；推力盘（6）位于两个支撑装置（3）之间。
  8. 一种氢能源压缩机，其特征在于，包括电机筒（61）、电机定子（62）、电机轴（620）、空气悬浮径向轴承（63）、空气悬浮轴向轴承（64）和轴向推力盘（65）；空气悬浮径向轴承（63）如权利要求1所述；电机定子（62）固定嵌设在电机筒（61）内，电机轴（620）设置有电机转子，电机转子与电机定子（62）相对齐；两个空气悬浮径向轴承（63）套设在电机轴（620）两端，用于对电机轴在径向提供支撑限位；轴向推力盘（65）固定套设在电机轴（620）上，空气悬浮轴向轴承（64）的支撑部位位于轴向推力盘（65）两侧，用于对轴向推力盘（65）进行轴向限位。
  9. 根据权利要求8所述一种氢能源压缩机，其特征在于，空气悬浮径向轴承（63）包括轴承座（71）、径向波箔（72）、中箔（73）、径向顶箔（74）和锁紧螺钉（75）；轴承座（71）设置有轴承孔（711）、固定槽（712）和螺钉孔（713），径向波箔（72）、中箔（73）和径向顶箔（74）都为开口的圆环形状；径向波箔（72）固定套设在中箔（73）外壁，中箔（73）套设在径向顶箔（74）外壁，并且径向波箔（72）外壁嵌设于轴承孔（711）内；中箔（73）和径向顶箔（74）在各自的开口端一侧都设置有凸出于各自外壁的固定部（741），中箔（73）的固定部和径向顶箔（74）的固定部（741）都穿过径向波箔（72）的开口端并且相互贴合；中箔（73）的固定部和径向顶箔（74）的固定部（741）都嵌合于固定槽（712）中，锁紧螺钉（75）旋合于螺钉孔（713），并且其顶端与中箔（73）的固定部（741）底面相接触将中箔（73）和径向顶箔（74）的固定部（741）压紧在固定槽（712）内。
  10. 根据权利要求9所述一种氢能源压缩机，其特征在于，锁紧螺钉（75）的压紧固定方向与空气悬浮径向轴承所支撑的内转轴的转动方向相同。
PCT/CN2021/127221 2021-07-07 2021-10-29 一种空气悬浮轴向轴承及氢能源压缩机 WO2023279586A1 (zh)

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