WO2020073551A1 - 轴向轴承、电机和空调器 - Google Patents

轴向轴承、电机和空调器 Download PDF

Info

Publication number
WO2020073551A1
WO2020073551A1 PCT/CN2019/070669 CN2019070669W WO2020073551A1 WO 2020073551 A1 WO2020073551 A1 WO 2020073551A1 CN 2019070669 W CN2019070669 W CN 2019070669W WO 2020073551 A1 WO2020073551 A1 WO 2020073551A1
Authority
WO
WIPO (PCT)
Prior art keywords
axial bearing
air supply
axial
stator
supply channel
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.)
Ceased
Application number
PCT/CN2019/070669
Other languages
English (en)
French (fr)
Inventor
汪汉新
闫瑾
魏琼
贾金信
郭长光
龚高
李忠雨
王泽业
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.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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 Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Publication of WO2020073551A1 publication Critical patent/WO2020073551A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0402—Bearings not otherwise provided for using magnetic or electric supporting means combined with other supporting means, e.g. hybrid bearings with both magnetic and fluid supporting means
    • 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
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0459—Details of the magnetic circuit
    • 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
    • F16C32/0662—Details of hydrostatic bearings independent of fluid supply or direction of load
    • 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
    • F16C32/0681—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load
    • F16C32/0692—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load for axial load only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/09—Structural association with bearings with magnetic 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
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Definitions

  • This application belongs to the technical field of motor equipment, and specifically relates to an axial bearing, a motor and an air conditioner.
  • the magnetic bearing of the magnetic levitation high-speed motor is composed of 6 parts, a radial bearing stator, a radial bearing rotor, an axial bearing (including front and rear axial bearings), a thrust disk, a sensor and a protective ball bearing.
  • a radial bearing stator When the motor is stationary, the rotating shaft falls on the protective ball bearing; when the motor is running, the sensor feeds back the detected rotating shaft position signal to the bearing controller.
  • the controller supplies the corresponding current to the radial bearing.
  • the combined force of electromagnetic force and gravity makes the rotating shaft around the axis Vibrate back and forth with a designed gap in the radial direction; supplying two axial bearings with a certain current, acting on the thrust disc is a pair of electromagnetic forces of equal size and opposite directions, ensuring that the rotating shaft does not move in the axial direction Bearing collision.
  • the related technical solution is to increase the graphite protection collision on the axial bearing in the electromagnetic bearing mechanism, but the axial height of the graphite is limited due to the size of the bearing gap; when the rotation of the rotating shaft is large, the graphite will be worn very seriously and cannot be For protection, the thrust disc will eventually directly hit the axial bearing, causing damage to it, making the bearing mechanism invalid and the motor unit unable to work.
  • the technical problem to be solved by the present application is to provide an axial bearing, a motor and an air conditioner, which can effectively solve the problem that the protective graphite cannot effectively protect the axial bearing, causing the thrust disk to hit the axial bearing stator to damage it .
  • the present application provides an axial bearing including two axial bearing stators arranged oppositely and a thrust plate arranged between the two axial bearing stators.
  • Each axial bearing stator is provided with The air channel and the air outlet of the air supply channel face the thrust disc.
  • the axial bearing further includes an airflow controller, which is used to control the airflow in the air supply channel.
  • the airflow controller independently controls the airflow in each axial bearing stator.
  • the outlet end of the air supply channel is also provided with a throttle structure, and the airflow flows to the thrust plate through the throttle structure.
  • the throttle structure includes a throttle hole provided at the outlet end of the air supply channel.
  • the throttle structure includes a throttle fixedly disposed in the air supply channel, and the throttle includes a throttle hole.
  • an air cavity is further provided at the outlet end of the orifice, and the cross-section of the air cavity is larger than that of the orifice.
  • the shape of the air cavity is fan-shaped, rectangular, circular, or elliptical.
  • air supply channels which are evenly distributed along the circumferential direction of the axial bearing stator.
  • the air supply channel is provided radially outside and / or radially inside of the axial bearing stator.
  • the air outlet is inclined toward the radial inner side of the axial bearing stator; and / or, when the air supply passage is provided radially of the axial bearing stator On the inside, the air outlet is inclined toward the radial outer side of the axial bearing stator.
  • a mounting slot is opened on the side of the axial bearing stator facing the thrust disc, and a control coil for controlling the axial position of the thrust disc is wound around the mounting slot.
  • the air supply channel is located radially outside and / or radially inside of the mounting groove.
  • a motor including a mounting seat, an axial bearing and a rotating shaft, the axial bearing is the above-mentioned axial bearing, and the axial bearing stator of the axial bearing is fixed on the mounting seat, the axial direction The thrust disk of the bearing is axially fixed on the rotating shaft.
  • an air conditioner including an axial bearing, the axial bearing being the aforementioned axial bearing.
  • the axial bearing provided by the present application includes two axial bearing stators arranged oppositely and a thrust disk arranged between the two axial bearing stators, each axial bearing stator is provided with an air supply channel, and the air supply channel The outlet of the gas is facing the thrust plate.
  • a layer of lubricating gas film with a certain load and rigidity is formed in the gap between the axial bearing stator and the thrust disk by passing air flow into the air supply channel. The size of the flow of the incoming gas completes the adjustment of the pressure between the air chamber and the thrust plate to realize the adjustment of the axial position of the main shaft.
  • FIG. 1 is a cross-sectional structural diagram of an axial bearing according to an embodiment of this application.
  • FIG. 2 is a cross-sectional structural view of an axial bearing stator of an axial bearing of an embodiment of the present application
  • FIG. 3 is a perspective cross-sectional structural view of an axial bearing stator of an axial bearing of an embodiment of the present application.
  • Axial bearing stator 2. Thrust disk; 3. Air supply channel; 4. Throttling structure; 5. Air cavity; 6. Installation slot; 7. Control coil; 8. Mounting seat; 9. Rotating shaft.
  • the axial bearing includes two opposed axial bearing stators 1 and a thrust plate 2 disposed between the two axial bearing stators 1, each The axial bearing stator 1 is provided with an air supply channel 3, and the air outlet of the air supply channel 3 faces the thrust disc 2.
  • the axial bearing forms a layer of lubricating gas film with a certain load and stiffness in the gap between the axial bearing stator 1 and the thrust disc 2 by passing airflow into the air supply channel 3 during the working process ,
  • the pressure between the air chamber and the thrust plate 2 is adjusted to achieve the adjustment of the main shaft in the axial position.
  • the rotating shaft deviates from the design air gap.
  • the axial bearing further includes an airflow controller, which is used to control the airflow in the air supply channel 3.
  • the airflow controller may include a controller and a flow regulating valve, wherein the flow regulating valve is provided on the air supply pipe connected to the inlet of the air supply channel 3, and can adjust the airflow size of the air supply pipe.
  • the axial spacing between the axial bearing stators 1 adjusts the opening of the flow regulating valve so that the opening of the flow regulating valve can be adjusted in such a direction that the spacing between the thrust plate 2 and the two axial bearing stators 1 is balanced , So that the gas film formed by the air supply channel 3 blowing into the gap can always keep the thrust disc 2 in the middle of the two axial bearing stators 1 without colliding with the axial bearing stator 1 and keeping the axial direction of the rotating shaft 9 Position balance.
  • the airflow controller independently controls the airflow in each axial bearing stator 1. Since the airflow controller controls the flow of airflow supplied to each axial bearing stator 1 independently, the axial bearing stator can be adjusted according to the axial position of the thrust plate 2 between the two axial bearing stators 1 The flow in 1, and then adjust the gas pressure between the axial bearing stator 1 and the thrust disk 2, so that the thrust disk 2 re-moves to the intermediate position of the two axial bearing stators 1, keeping the axial position of the rotating shaft 9 balanced .
  • the outlet end of the air supply channel 3 is further provided with a throttle structure 4, and the airflow flows to the thrust plate 2 through the throttle structure 4.
  • the throttle structure 4 can throttle the air flow flowing from the air supply channel 3 to the thrust plate 2.
  • the pressure drop when the compressed gas passes through the throttle structure 4 causes a cooling effect, and the air viscosity is extremely low, so it can be more effectively
  • a stable gas film is formed between the axial bearing stator 1 and the thrust disk 2, and the temperature between the thrust disk 2 and the axial bearing stator 1 can be further reduced to reduce the temperature rise of the axial bearing.
  • the throttle structure 4 includes a throttle hole provided at the outlet end of the air supply channel 3.
  • the throttle structure 4 may further include a throttle fixedly disposed in the air supply channel 3, and the throttle includes a throttle hole.
  • an air cavity 5 is further provided at the outlet end of the orifice, and the cross section of the air cavity 5 is larger than that of the orifice.
  • the air supply channel 3, the orifice and the air cavity 5 are in communication.
  • the throttle is decompressed through the orifice, and then enters the air cavity 5, the volume expands again, in the process
  • the airflow needs to absorb heat, so the temperature of the gas film at the gap communicating with the air cavity 5 will be further reduced, thereby reducing the temperature of the axial bearing stator 1 and the thrust plate 2.
  • the shape of the air cavity 5 is a fan-shaped ring, a rectangle, a circle, or an ellipse.
  • the shape of the air cavity 5 is a fan-shaped ring or a rectangular and other elongated shape, which can quickly shunt the gas in the circumferential direction, and then quickly distributed to the entire axial bearing stator 1 along the outlet of the elongated air cavity 5
  • the gap with the thrust plate 2 makes the gas distribution more rapid and even, and the protection effect is better.
  • gas supply channels 3 which are evenly distributed along the circumferential direction of the axial bearing stator 1 and can simultaneously emit gas at multiple circumferential positions of the axial bearing stator 1 to further improve the gas distribution efficiency.
  • the number of the air supply channels 3 may be an even number or an odd number, and the center of the axial bearing stator 1 needs to be evenly distributed in the circumferential direction.
  • the air supply channel 3 is arranged radially outside and / or radially inside of the axial bearing stator 1.
  • the air supply passage 3 may be provided only on the radial outer side of the axial bearing stator 1, or may be provided only on the radial outer side of the axial bearing stator 1, or may be provided on the radial direction of the axial bearing stator 1 at the same time. Outside and radially inside.
  • the air supply channel 3 is provided at the radial outer side and the radial inner side of the axial bearing stator 1 at the same time, the air supply channel can be formed at the radial outer side and the radial inner side of the axial bearing stator 1 at the same time, so that the gas distribution is more uniform.
  • the gas film is formed faster, and the force distribution between the axial bearing stator 1 and the thrust plate 2 is more balanced and stable.
  • the air outlet is inclined toward the radial inner side of the axial bearing stator 1.
  • the air outlet is inclined toward the radial outer side of the axial bearing stator 1.
  • the gas flowing out of the air outlet can be prevented from flowing away from the radial outer side or the radial inner side of the axial bearing stator 1 more effectively, thereby improving the use efficiency of the compressed gas.
  • the axial bearing stator 1 is provided with a mounting slot 6 on the side facing the thrust disc 2, and a control coil 7 for controlling the axial position of the thrust disc 2 is wound around the mounting slot 6.
  • the thrust disk 2 is a magnetically conductive material
  • the main purpose of the air supply channel 3 is to assist the electromagnetic bearing so that the rotating shaft 9 is always in a balanced position; due to the assistance of the air supply channel 3, the bearing components are axial
  • the additional force is the pressure generated by the gas; while the previous shaft 9 axial stability force is only provided by the electromagnetic force of the bearing, so after adding pneumatic assistance
  • the electromagnetic force required for axial bearings can be reduced.
  • the bearing performance can be effectively improved, and the following two optimizations can be achieved: 1.
  • the current is reduced, and the bearing calorific value is reduced. 2.
  • the volume of the axial coil can be reduced. At this time, the volume of the bearing is also reduced.
  • the same current can be used as before, and the same electromagnetic force is output to ensure the shaft of the rotating shaft.
  • the above two optimizations make the electromagnetic bearing can reduce the rated current during use, reduce the volume of the bearing mechanism, and improve the overall reliability of the bearing mechanism.
  • the air supply channel 3 is located radially outside and / or radially inside of the mounting groove 6.
  • the airflow flows out of the radial outer side and / or radial inner side of the mounting groove 6, it will flow through the mounting groove 6, thereby taking away the heat of the control coil 7 in the mounting groove 6, reducing the power lost by heat generation, and improving the efficiency of the unit.
  • it can effectively solve the problem that the heat cannot be dissipated in time when the coil temperature rises sharply, causing the coil temperature to rise and burn, and improve the stability and reliability of the axial bearing during operation.
  • the motor includes a mounting seat 8, an axial bearing and a rotating shaft 9, the axial bearing is the above-mentioned axial bearing, the axial bearing stator 1 of the axial bearing is fixed on the mounting seat 8, the axial bearing The thrust disk 2 is axially fixed on the rotating shaft 9.
  • the air conditioner includes an axial bearing, which is the aforementioned axial bearing.
  • the axial bearing is cooled during the operation of the unit to reduce the power of heat loss and improve the efficiency of the unit.
  • the pneumatic structure can avoid the collision between the thrust disk on the rotating shaft and the axial bearing stator when the motor runs abnormally, avoiding the bearing damage caused by the collision and ensuring the reliability of the motor operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

一种轴向轴承、电机和空调器。该轴向轴承包括两个相对设置的轴向轴承定子(1)以及设置在两个轴向轴承定子(1)之间的止推盘(2)，各轴向轴承定子(1)上均设置有供气通道(3)，供气通道(3)的出气口朝向止推盘(2)。根据上述轴向轴承，能够有效解决保护石墨无法对轴向轴承形成有效保护，导致止推盘(2)撞击轴向轴承定子(1)至其损坏的问题。

Description

轴向轴承、电机和空调器
本申请要求于2018年10月09日提交中国专利局、申请号为201811174566.0、发明名称为“轴向轴承、电机和空调器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请属于电机设备技术领域，具体涉及一种轴向轴承、电机和空调器。
背景技术
磁悬浮高速电机电磁轴承是由6部分组成，径向轴承定子、径向轴承转子、轴向轴承(包括前、后轴向轴承)、止推盘、传感器和保护滚珠轴承。电机静止时，转轴落在保护滚珠轴承上；电机运行时，传感器将检测的转轴位置信号反馈给轴承控制器，控制器供给径向轴承相应的电流，电磁力和重力的合力使转轴围绕轴心在径向以设计的间隙来回振动；供给两个轴向轴承一定的电流，作用在止推盘上是一对大小相等方向相反的电磁力，保证转轴在轴向不窜动、不与轴向轴承碰撞。
上述电磁轴承在运行中存在以下问题点：
1、电机运行受到负载冲击和轴承控制器出现失稳时，电磁轴承线圈电流过大，线圈绕组的电流密度增大、线负荷增大，导致线圈温度急剧升高；由于轴承机构为高度密封机构，且各部件间隙很小，所以线圈发热的热量不能及时散走，最后导致轴承线圈温度升高烧毁，轴承系统失效，整套电机机组无法工作。在正常工况运行时，轴承机构的温度虽然不会导致轴承烧毁，但较高的温度也会影响轴承机构中绝缘材料的使用寿命，影响轴承及电机组件长期运行的可靠性；
2、电机运行受到负载冲击或轴承控制器出现失稳时，转轴偏离设计气隙发生窜动，固定在转轴上的止推盘与轴向轴承发生碰撞，导致轴向轴承失效、 转轴弯曲，最后电机无法正常运行。
相关技术方案是在电磁轴承机构中的轴向轴承上增加石墨保护碰撞，但受轴承间隙大小的限制，石墨的轴向高度有限；当转轴窜动较大，石墨会被磨损得很严重，不能起到保护作用，止推盘最后会直接撞击轴向轴承，导致其损坏，使轴承机构失效、电机机组无法工作。
发明内容
因此，本申请要解决的技术问题在于提供一种轴向轴承、电机和空调器，能够有效解决保护石墨无法对轴向轴承形成有效保护，导致止推盘撞击轴向轴承定子至其损坏的问题。
为了解决上述问题，本申请提供一种轴向轴承，包括两个相对设置的轴向轴承定子以及设置在两个轴向轴承定子之间的止推盘，各轴向轴承定子上均设置有供气通道，供气通道的出气口朝向止推盘。
可选地，轴向轴承还包括气流控制器，气流控制器用于控制供气通道内的气流流量。
可选地，气流控制器分别独立控制各轴向轴承定子内的气流流量。
可选地，供气通道的出气端还设置有节流结构，气流经节流结构流向止推盘。
可选地，节流结构包括设置在供气通道的出气端的节流孔。
可选地，节流结构包括固定设置在供气通道内的节流器，节流器包括节流孔。
可选地，节流孔的出气端还设置有气腔，气腔的截面大于节流孔的截面。
可选地，在轴向轴承定子的横截面上，气腔的形状为扇环形、矩形、圆形或椭圆形。
可选地，供气通道为多个，并沿轴向轴承定子的周向均匀分布。
可选地，供气通道设置在轴向轴承定子的径向外侧和/或径向内侧。
可选地，当供气通道设置在轴向轴承定子的径向外侧时，出气口朝向轴向轴承定子的径向内侧倾斜；和/或，当供气通道设置在轴向轴承定子的径向内侧时，出气口朝向轴向轴承定子的径向外侧倾斜。
可选地，轴向轴承定子朝向止推盘的一侧开设有安装槽，安装槽内绕设有控制止推盘的轴向位置的控制线圈。
可选地，供气通道位于安装槽的径向外侧和/或径向内侧。
根据本申请的另一方面，提供了一种电机，包括安装座、轴向轴承和转轴，轴向轴承为上述的轴向轴承，轴向轴承的轴向轴承定子固定在安装座上，轴向轴承的止推盘轴向固定在转轴上。
根据本申请的再一方面，提供了一种空调器，包括轴向轴承，该轴向轴承为上述的轴向轴承。
本申请提供的轴向轴承，包括两个相对设置的轴向轴承定子以及设置在两个轴向轴承定子之间的止推盘，各轴向轴承定子上均设置有供气通道，供气通道的出气口朝向止推盘。该轴向轴承在工作过程中，通过向供气通道内通入气流的方式，在轴向轴承定子与止推盘之间的间隙处形成一层具有一定承载和刚度的润滑气膜，通过调节通入气体流量的大小，完成气腔与止推盘间压力大小的调节，实现主轴在轴向位置的调节，当电机运行受到负载冲击出现失稳时，转轴偏离设计气隙运行，依靠该结构形成的气膜将止推盘保持在前后轴向轴承定子中间，不与轴向轴承定子碰撞，保持转轴的轴向位置平衡，省去原结构中的保护石墨，避免该部件失效带来的隐患，提高电机工作可靠性。
附图说明
图1为本申请实施例的轴向轴承的剖视结构图；
图2为本申请实施例的轴向轴承的轴向轴承定子的剖视结构图；
图3为本申请实施例的轴向轴承的轴向轴承定子的立体剖视结构图。
附图标记表示为：
1、轴向轴承定子；2、止推盘；3、供气通道；4、节流结构；5、气腔；6、安装槽；7、控制线圈；8、安装座；9、转轴。
具体实施方式
结合参见图1至图3所示，根据本申请的实施例，轴向轴承包括两个相对设置的轴向轴承定子1以及设置在两个轴向轴承定子1之间的止推盘2，各轴向轴承定子1上均设置有供气通道3，供气通道3的出气口朝向止推盘2。
该轴向轴承在工作过程中，通过向供气通道3内通入气流的方式，在轴向轴承定子1与止推盘2之间的间隙处形成一层具有一定承载和刚度的润滑气膜，通过调节通入气体流量的大小，完成气腔与止推盘2间压力大小的调节，实现主轴在轴向位置的调节，当电机运行受到负载冲击出现失稳时，转轴偏离 设计气隙运行，依靠该结构形成的气膜将止推盘2保持在前后轴向轴承定子1中间，不与轴向轴承定子1碰撞，保持转轴9的轴向位置平衡，省去原结构中的保护石墨，避免该部件失效带来的隐患，提高电机工作可靠性。
在运行过程中由于外部气体一直通入轴承内部，因此即使在止推盘2与轴向轴承定子1这种两者工作间隙较小的环境中时，也能保持很小的温升，使轴承高温升导致轴承烧毁的问题可以得到避免，轴承机构绝缘材料的使用寿命得到保证，提高机组长期运行可靠性，同时减少发热损失的功率，提高机组效率。
可选地，轴向轴承还包括气流控制器，气流控制器用于控制供气通道3内的气流流量。气流控制器可以包括控制器和流量调节阀，其中流量调节阀设置在与供气通道3的入口连接的供气管上，能够调节供气管的气流大小，控制器用于根据止推盘2与两个轴向轴承定子1之间的轴向间距来调节流量调节阀的开度，使得流量调节阀的开度能够向着使得止推盘2与两个轴向轴承定子1之间的间距均衡的方向调节，从而使得供气通道3吹入间隙所形成的气膜能够始终将止推盘2保持在两个轴向轴承定子1的中间，不与轴向轴承定子1发生碰撞，保持转轴9的轴向位置平衡.
可选地，气流控制器分别独立控制各轴向轴承定子1内的气流流量。由于气流控制器对于供应至每个轴向轴承定子1的气流流量均是单独控制，因此可以根据止推盘2在两个轴向轴承定子1之间的轴向位置来调节相应轴向轴承定子1内的流量，进而调节该轴向轴承定子1与止推盘2之间的气体压力，使得止推盘2重新运动至两个轴向轴承定子1中间位置，保持转轴9的轴向位置平衡。
可选地，供气通道3的出气端还设置有节流结构4，气流经节流结构4流向止推盘2。节流结构4能够对从供气通道3流动至止推盘2的气流进行节流，当压缩气体通过节流结构4时的压力降低引起冷却效应，且空气粘度极低，因此能够更加有效地在轴向轴承定子1和止推盘2之间形成稳定的气膜，并且可以进一步降低止推盘2与轴向轴承定子1之间的温度，降低轴向轴承的温升。
在本实施例中，节流结构4包括设置在供气通道3的出气端的节流孔。
在另外一个图中未示出的实施例中，节流结构4还可以包括固定设置在供气通道3内的节流器，节流器包括节流孔。
可选地，节流孔的出气端还设置有气腔5，气腔5的截面大于节流孔的截面。供气通道3、节流孔和气腔5连通，当压缩气体通过供气通道3进入之后，经节流孔进行节流降压，然后进入到气腔5内，体积再次膨胀，在此过程中， 气流需要吸热，因此会进一步降低与气腔5连通的间隙处的气膜温度，进而降低轴向轴承定子1与止推盘2的温度。
在轴向轴承定子1的横截面上，气腔5的形状为扇环形、矩形、圆形或椭圆形。可选地，气腔5的形状为扇环形或者矩形等长条形，能够使气体沿周向方向快速分流，然后沿着长条形的气腔5的出口快速分布至整个轴向轴承定子1和止推盘2的间隙，使得气体分布更加快速均匀，保护效果更佳。
可选地，供气通道3为多个，并沿轴向轴承定子1的周向均匀分布，能够同时在轴向轴承定子1的多个周向位置进行出气，进一步提高气体分布效率。供气通道3的数量可以为偶数个，也可以为奇数个，需要以轴向轴承定子1的中心为圆心周向均匀分布。
供气通道3设置在轴向轴承定子1的径向外侧和/或径向内侧。具体而言，供气通道3可以仅设置在轴向轴承定子1的径向外侧，也可以仅设置在轴向轴承定子1的径向外侧，还可以同时设置在轴向轴承定子1的径向外侧和径向内侧。当供气通道3同时设置在轴向轴承定子1的径向外侧和径向内侧时，可以在轴向轴承定子1的径向外侧和径向内侧同时形成供气通道，使得气体分布更加均匀。气膜形成更加快速，并使得轴向轴承定子1与止推盘2之间的受力分布更加均衡稳定。
可选地，当供气通道3设置在轴向轴承定子1的径向外侧时，出气口朝向轴向轴承定子1的径向内侧倾斜。
当供气通道3设置在轴向轴承定子1的径向内侧时，出气口朝向轴向轴承定子1的径向外侧倾斜。
通过使出气口倾斜设置，能够使得气体在从出气口流出时，更快且更多地进入到轴向轴承定子1与止推盘2之间的主要配合区域，在主要配合区域形成润滑气膜，且能够更加有效地避免出气口流出的气体从轴向轴承定子1的径向外侧或者径向内侧流走，提高压缩气体的使用效率。
可选地，在本实施例中，轴向轴承定子1朝向止推盘2的一侧开设有安装槽6，安装槽6内绕设有控制止推盘2的轴向位置的控制线圈7。在本实施例中，止推盘2为导磁材料，供气通道3供气的主要目的是辅助电磁轴承使转轴9始终处于平衡位置；由于该供气通道3的辅助，轴承部件在轴向上现在有两个力来保持电机转轴9在轴向的稳定，多增加的一个力为气体产生的压力；而之前转轴9轴向稳定的力只由轴承的电磁力提供，所以增加气动辅助后，轴向轴承需要出到的电磁力可以减小。
当轴承需要的电磁力减小后，能够有效提高轴承性能，并实现如下两种优化：1、同一电磁轴承，在减小使用电流后，此时输出的电磁力满足轴向力需求，由于使用电流得到减小，轴承发热量减小；2、能够减小轴向线圈的体积此时轴承的体积也一起减小，可以使用与之前一样的电流，同样输出相同的电磁力，保证转轴的轴向稳定。以上两种优化使得电磁轴承可减小使用过程中的额定电流、减小轴承机构的体积，使轴承机构整体的可靠性得到提升。
可选地，供气通道3位于安装槽6的径向外侧和/或径向内侧。当气流从安装槽6的径向外侧和/或径向内侧流出时，会流经安装槽6，从而带走安装槽6内的控制线圈7的热量，减少发热损失的功率，提高机组效率，而且能够有效解决线圈温度急剧升高时热量无法及时散走导致线圈温度升高烧毁的问题，提高轴向轴承运行时的稳定性和可靠性。
根据本申请的实施例，电机包括安装座8、轴向轴承和转轴9，轴向轴承为上述的轴向轴承，轴向轴承的轴向轴承定子1固定在安装座8上，轴向轴承的止推盘2轴向固定在转轴9上。
根据本申请的实施例，空调器包括轴向轴承，该轴向轴承为上述的轴向轴承。
通过采用本申请的轴向轴承，可以实现如下效果：
1、本申请通过增加供气通道，达成磁悬浮轴承气电的混合输出，减小电磁轴承使用过程中的额定电流，减小轴向轴承的体积，使轴向轴承整体的可靠性得到提升。
2、本申请通过增加供气通道，在机组运行时对轴向轴承进行冷却，减少发热损失的功率，提高机组效率。
3、本申请通过增加供气通道，在电机运行出现异常情况时，气动结构可以避免转轴上的止推盘与轴向轴承定子的碰撞，避免碰撞导致的轴承损坏,保证电机运行的可靠性。
本领域的技术人员容易理解的是，在不冲突的前提下，上述各有利方式可以自由地组合、叠加。
以上仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。以上仅是本申请的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请技术原理的前提下，还可以做出若干改进和变型，这些改进和变型也应视为本申请的保护范围。

Claims (15)

  1. 一种轴向轴承，包括两个相对设置的轴向轴承定子(1)以及设置在两个所述轴向轴承定子(1)之间的止推盘(2)，各所述轴向轴承定子(1)上均设置有供气通道(3)，所述供气通道(3)的出气口朝向所述止推盘(2)。
  2. 根据权利要求1所述的轴向轴承，其中，所述轴向轴承还包括气流控制器，所述气流控制器用于控制所述供气通道(3)内的气流流量。
  3. 根据权利要求2所述的轴向轴承，其中，所述气流控制器分别独立控制各所述轴向轴承定子(1)内的气流流量。
  4. 根据权利要求1所述的轴向轴承，其中，所述供气通道(3)的出气端还设置有节流结构(4)，气流经所述节流结构(4)流向所述止推盘(2)。
  5. 根据权利要求4所述的轴向轴承，其中，所述节流结构(4)包括设置在所述供气通道(3)的出气端的节流孔。
  6. 根据权利要求5所述的轴向轴承，其中，所述节流结构(4)包括固定设置在所述供气通道(3)内的节流器，所述节流器包括节流孔。
  7. 根据权利要求5或6所述的轴向轴承，其中，所述节流孔的出气端还设置有气腔(5)，所述气腔(5)的截面大于所述节流孔的截面。
  8. 根据权利要求7所述的轴向轴承，其中，在所述轴向轴承定子(1)的横截面上，所述气腔(5)的形状为扇环形、矩形、圆形或椭圆形。
  9. 根据权利要求1所述的轴向轴承，其中，所述供气通道(3)为多个，并沿所述轴向轴承定子(1)的周向均匀分布。
  10. 根据权利要求1至6中任一项所述的轴向轴承，其中，所述供气通道(3)设置在所述轴向轴承定子(1)的径向外侧和/或径向内侧。
  11. 根据权利要求10所述的轴向轴承，其中，当所述供气通道(3)设置在所述轴向轴承定子(1)的径向外侧时，所述出气口朝向所述轴向轴承定子(1)的径向内侧倾斜；和/或，当所述供气通道(3)设置在所述轴向轴承定子(1)的径向内侧时，所述出气口朝向所述轴向轴承定子(1)的径向外侧倾斜。
  12. 根据权利要求1至6、8、9、11中任一项所述的轴向轴承，其中，所述轴向轴承定子(1)朝向所述止推盘(2)的一侧开设有安装槽(6)，所述安装槽(6)内绕设有控制所述止推盘(2)的轴向位置的控制线圈(7)。
  13. 根据权利要求12所述的轴向轴承，其中，所述供气通道(3)位于所述安装槽(6)的径向外侧和/或径向内侧。
  14. 一种电机，包括安装座(8)、轴向轴承和转轴(9)，所述轴向轴承为权利要求1至13中任一项所述的轴向轴承，所述轴向轴承的轴向轴承定子(1)固定在所述安装座(8)上，所述轴向轴承的止推盘(2)轴向固定在所述转轴(9)上。
  15. 一种空调器，包括轴向轴承，所述轴向轴承为权利要求1至13中任一项所述的轴向轴承。
PCT/CN2019/070669 2018-10-09 2019-01-07 轴向轴承、电机和空调器 Ceased WO2020073551A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811174566.0 2018-10-09
CN201811174566.0A CN109139692A (zh) 2018-10-09 2018-10-09 轴向轴承、电机和空调器

Publications (1)

Publication Number Publication Date
WO2020073551A1 true WO2020073551A1 (zh) 2020-04-16

Family

ID=64810589

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/070669 Ceased WO2020073551A1 (zh) 2018-10-09 2019-01-07 轴向轴承、电机和空调器

Country Status (2)

Country Link
CN (1) CN109139692A (zh)
WO (1) WO2020073551A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109139692A (zh) * 2018-10-09 2019-01-04 珠海格力电器股份有限公司 轴向轴承、电机和空调器
CN113700740B (zh) * 2021-08-25 2022-08-16 珠海格力电器股份有限公司 一种电机系统轴向轴承的保护装置、方法和电机系统
CN114992242B (zh) * 2022-06-16 2023-06-20 中国工程物理研究院机械制造工艺研究所 一种抗扰动气浮轴承
CN119308937A (zh) * 2024-10-10 2025-01-14 珠海格力电器股份有限公司 磁悬浮旋转机械
CN119308935B (zh) * 2024-10-10 2025-09-26 珠海格力电器股份有限公司 一种磁悬浮旋转机械

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007023836A1 (ja) * 2005-08-25 2007-03-01 Ntn Corporation 空気サイクル冷凍冷却用タービンユニット
CN105299046A (zh) * 2015-11-20 2016-02-03 珠海格力节能环保制冷技术研究中心有限公司 轴向磁悬浮轴承用定心装置、轴向磁悬浮轴承及装配方法
CN206036034U (zh) * 2016-08-29 2017-03-22 解璟昊 一种磁悬浮轴承
CN108050157A (zh) * 2017-11-23 2018-05-18 燕山大学 一种磁液双悬浮支承分断式锥形轴承
CN108488233A (zh) * 2018-03-27 2018-09-04 燕山大学 一种带有多孔介质的磁气双悬浮轴向轴承
CN109139692A (zh) * 2018-10-09 2019-01-04 珠海格力电器股份有限公司 轴向轴承、电机和空调器
CN208935162U (zh) * 2018-10-09 2019-06-04 珠海格力电器股份有限公司 轴向轴承、电机和空调器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203847561U (zh) * 2014-06-05 2014-09-24 浙江机电职业技术学院 用于立式氦透平膨胀机上的静压气体轴承
CN106015032B (zh) * 2016-06-28 2018-05-22 杭州万辰机电科技有限公司 离心压缩机
CN106321634A (zh) * 2016-11-18 2017-01-11 广州市昊志机电股份有限公司 一种复合式气浮轴系结构
CN107100930B (zh) * 2017-04-21 2019-02-22 燕山大学 一种电磁-静压双悬浮推力轴承

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007023836A1 (ja) * 2005-08-25 2007-03-01 Ntn Corporation 空気サイクル冷凍冷却用タービンユニット
CN105299046A (zh) * 2015-11-20 2016-02-03 珠海格力节能环保制冷技术研究中心有限公司 轴向磁悬浮轴承用定心装置、轴向磁悬浮轴承及装配方法
CN206036034U (zh) * 2016-08-29 2017-03-22 解璟昊 一种磁悬浮轴承
CN108050157A (zh) * 2017-11-23 2018-05-18 燕山大学 一种磁液双悬浮支承分断式锥形轴承
CN108488233A (zh) * 2018-03-27 2018-09-04 燕山大学 一种带有多孔介质的磁气双悬浮轴向轴承
CN109139692A (zh) * 2018-10-09 2019-01-04 珠海格力电器股份有限公司 轴向轴承、电机和空调器
CN208935162U (zh) * 2018-10-09 2019-06-04 珠海格力电器股份有限公司 轴向轴承、电机和空调器

Also Published As

Publication number Publication date
CN109139692A (zh) 2019-01-04

Similar Documents

Publication Publication Date Title
WO2020073551A1 (zh) 轴向轴承、电机和空调器
CN110380569B (zh) 磁悬浮电机及鼓风机
JPWO2019087869A1 (ja) 遠心圧縮機
CN115289044B (zh) 一种双头高效自冷分离式通风结构的空气悬浮离心鼓风机
CN116633081A (zh) 一种具有转子主轴散热风道的磁悬浮高速鼓风机
WO2022267452A1 (zh) 定子骨架、磁悬浮轴承、压缩机和空调器
CN119042235A (zh) 轴向磁悬浮轴承、磁悬浮旋转机械
CN119021979A (zh) 轴向磁悬浮轴承、磁悬浮旋转机械
CN119177983A (zh) 轴向磁悬浮轴承、磁悬浮旋转机械
CN119021977A (zh) 轴向磁悬浮轴承、磁悬浮旋转机械
WO2022127026A1 (zh) 一种小型高速风机
WO2026077164A1 (zh) 一种磁悬浮轴承和磁悬浮旋转机械
CN208935162U (zh) 轴向轴承、电机和空调器
CN113653664B (zh) 一种磁悬浮轴流风机的电机转子冷却风道结构
CN223035511U (zh) 轴向磁悬浮轴承、磁悬浮旋转机械
US10797565B2 (en) Motor with inner fan
CN119021976A (zh) 轴向磁悬浮轴承、磁悬浮旋转机械
CN117989177A (zh) 一种空压机冷却结构、空压机
CN205544792U (zh) 一种大型风力发电机轴承的通风冷却结构
JP3235100U (ja) 調速機能が標準装備されるモータ
CN111371220A (zh) 一种具有内部流道的电机转子及压缩机
WO2023162160A1 (ja) 電動圧縮機
CN208094354U (zh) 一种大型电机轴承的冷却系统
CN223035513U (zh) 轴向磁悬浮轴承、磁悬浮旋转机械
CN223035508U (zh) 轴向磁悬浮轴承、磁悬浮旋转机械

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19871730

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19871730

Country of ref document: EP

Kind code of ref document: A1