WO2018228262A1 - 转轴保护及径向位移检测结构、磁悬浮电机及家用空调 - Google Patents

转轴保护及径向位移检测结构、磁悬浮电机及家用空调 Download PDF

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Publication number
WO2018228262A1
WO2018228262A1 PCT/CN2018/090216 CN2018090216W WO2018228262A1 WO 2018228262 A1 WO2018228262 A1 WO 2018228262A1 CN 2018090216 W CN2018090216 W CN 2018090216W WO 2018228262 A1 WO2018228262 A1 WO 2018228262A1
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Prior art keywords
radial displacement
mounting base
detecting
protection
opening
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PCT/CN2018/090216
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English (en)
French (fr)
Inventor
江华
张寅�
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深圳麦格动力技术有限公司
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Publication of WO2018228262A1 publication Critical patent/WO2018228262A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for

Definitions

  • the utility model relates to the technical field of magnetic levitation, in particular to a shaft protection and radial displacement detecting structure, a magnetic levitation motor and a household air conditioner.
  • the conventional motor mainly includes a stator part of the motor, a rotor part of the motor, a support bearing of the rotor, and a casing part.
  • the stator part of the motor and the rotor part of the motor are mechanically coupled or mechanically contacted, so there is mechanical friction during the movement of the electronic rotor.
  • the support of the existing magnetic suspension motor rotor shaft usually needs to be completed by a radial magnetic suspension bearing, a radial displacement sensor and a floating ring.
  • the radial magnetic suspension bearing, the radial displacement sensor and the floating ring are arranged side by side on the rotor shaft, occupying a large space. .
  • the technical problem to be solved by the utility model is to solve the problem that the radial displacement sensor and the floating ring of the prior art magnetic suspension motor occupy a large axial space and increase the overall volume of the magnetic suspension motor.
  • the present invention provides a shaft protection and radial displacement detecting structure, comprising a mounting base and a plurality of detecting probes, the mounting base is arranged in a ring shape, and the inner ring of the mounting base is used for supporting protection a stationary rotating shaft, wherein the inner ring of the mounting base is provided with a plurality of grooves for mounting the detecting probes; the detecting probes are in one-to-one correspondence with the grooves, and the detecting probes are facing the mounting An end surface inside the base is located inside the groove.
  • the detection probe is provided with four, and the four detection probes are located on the same circumference and are spaced apart from each other by 90°.
  • the detecting probe is cylindrical, and the axial direction of the detecting probe is located in the radial direction of the mounting base.
  • the groove is provided with a first opening and an second opening, the first opening is located at an inner ring of the mounting base, and the second opening is located at a side of the mounting base for the Check the loading of the probe.
  • the first opening is in communication with the second opening, and a side of the groove opposite to the second opening is a circular arc surface that cooperates with the detecting probe.
  • the detecting probe is adhesively connected to the inner surface of the groove.
  • the utility model also provides a magnetic levitation motor, comprising a rotor shaft and the above-mentioned shaft protection and radial displacement detecting structure, wherein the shaft protection and the radial displacement detecting structure are sleeved on the outer side of the rotor shaft.
  • the utility model also provides a household air conditioner, comprising a compressor, the compressor comprising the above-mentioned magnetic levitation motor.
  • the mounting base not only forms a radial displacement sensor for detecting the radial displacement of the rotating shaft, but also the detecting probe as a whole.
  • the inner ring of the mounting base can be used as a floating ring. When the rotating shaft stops rotating, the rotating shaft first falls on the inner ring of the mounting base. Since the detecting probe is located inside the groove, the detecting probe is not used. Cause any impact.
  • the embodiment of the utility model integrates the bearing protection and the radial displacement detecting structure, has a compact structure, reduces the volume, and facilitates the assembly of the subsequent magnetic suspension motor.
  • FIG. 1 is a schematic view of a shaft protection and radial displacement detecting structure provided by an embodiment of the present invention
  • FIG. 2 is a cross-sectional view of a shaft protection and radial displacement detecting structure provided by an embodiment of the present invention.
  • 1 mounting base
  • 2 detecting probe
  • 3 inner ring
  • 4 groove
  • 5 end face
  • 6 arc face
  • 7 first opening
  • 8 second opening.
  • a radial displacement sensor In order to realize the radial displacement detection of the rotor shaft in the magnetic levitation motor, a radial displacement sensor is usually provided.
  • the magnetic levitation motor In order to ensure that the magnetic levitation bearing of the magnetic levitation motor can smoothly float the rotor shaft and the rotor shaft is smoothly stopped, the magnetic levitation motor is usually provided with a floating ring. The inner diameter of the floating ring is smaller than the inner diameter of the magnetic suspension bearing, so that the rotor shaft floats smoothly.
  • the embodiment of the present invention provides an integrated structure of the shaft protection and the radial displacement detection, as follows:
  • the stationary rotating shaft, the inner ring 3 of the mounting base 1 is provided with a plurality of grooves 4 for mounting the detecting probe 2; the detecting probe 2 is in one-to-one correspondence with the groove 4, and the detecting probe 2 faces the end surface of the mounting base 1 5 is located inside the recess 4.
  • the structure is applied to a magnetic levitation motor as an example, and the rotating shaft is a rotor shaft in a magnetic levitation motor.
  • the structure can also be applied to other magnetic levitation supporting rotating shafts.
  • the mounting base 1 not only forms a radial displacement sensor for detecting the radial displacement of the rotating shaft as a fixing member of the detecting probe 2, but also the detecting probe 2 is integrally disposed inside the groove 4, and the inner ring 3 of the mounting base 1 is installed. It can be used as a floating ring.
  • the rotating shaft stops rotating, the rotating shaft first falls onto the inner ring 3 of the mounting base 1. Since the detecting probe 2 is located inside the groove 4, it does not have any influence on the detecting probe 2.
  • the embodiment of the utility model integrates the support protection and the radial displacement detecting structure, has a compact structure, reduces the volume, and facilitates the assembly of the subsequent magnetic suspension motor.
  • the detecting probe 2 is provided with four, and the four detecting probes 2 are located on the same circumference and are spaced apart from each other by 90°.
  • the four detecting probes 2 can be used to detect the positive and negative directions of the X-axis of the rotating shaft and the displacement of the positive and negative directions of the Y-axis, respectively.
  • the recess 4 is provided with a second opening 8 and a second opening
  • the second opening 8 is located at the inner ring 3 of the mounting base 1, and the second opening is located at the side of the mounting base 1 for detecting the probe 2.
  • the second opening 8 serves as a detecting port of the detecting probe 2, and detects a radial displacement of the rotating shaft through the second opening 8.
  • the area of the second opening is large, which facilitates the loading of the detecting probe 2, and is convenient for detecting the probe 2 and the mounting base 1. assembly.
  • the detecting probe 2 of the present embodiment is preferably cylindrical, and the axial direction of the detecting probe 2 is located in the radial direction of the mounting base 1.
  • the second opening 8 is in communication with the second opening, and the opposite side of the groove 4 from the second opening is a circular arc surface 6 that cooperates with the detecting probe 2.
  • the circular arc surface 6 is fitted to the cylindrical surface of the detecting probe 2, so that the fixing of the detecting probe 2 is relatively stable.
  • the detecting probe 2 is adhesively coupled to the inner surface of the recess 4.
  • the embodiment of the present invention further provides a magnetic levitation motor, comprising a rotating shaft and the above-mentioned shaft protection and radial displacement detecting structure, wherein the shaft protection and the radial displacement detecting structure are sleeved on the outer side of the rotating shaft.
  • the specific structure of the magnetic levitation motor can be any one of the existing magnetic levitation motor radial displacement sensors and the floating ring is replaced by the shaft protection and radial displacement detecting structure of the present invention.
  • the integrated structure is applied to the magnetic levitation motor, the volume of the magnetic levitation motor is reduced, the structure is more compact, and the assembly of the magnetic levitation motor is facilitated.
  • the utility model also uses a household air conditioner, which comprises a compressor, and the compressor comprises the above magnetic suspension motor. Improve the service life of household air conditioners, reduce noise and improve system performance.
  • the utility model provides a shaft protection and a radial displacement detecting structure.
  • the mounting base not only forms a radial displacement sensor for detecting the radial displacement of the rotating shaft as a fixing member of the detecting probe, but also the detecting probe is integrally disposed inside the groove, and the mounting base is installed.
  • the inner ring can be used as a floating ring. When the rotating shaft stops rotating, the rotating shaft first falls on the inner ring of the mounting base. Since the detecting probe is located inside the groove, it does not affect the detecting probe.
  • the bearing protection and the radial displacement detecting structure are integrated together, the structure is compact, the volume is reduced, and the subsequent magnetic suspension motor assembly is facilitated, which has strong industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

一种转轴保护及径向位移检测结构、磁悬浮电机及家用空调，涉及磁悬浮技术领域，所述转轴保护及径向位移检测结构包括安装底座（1）以及多个检测探头（2），所述安装底座（1）设置为环形，所述安装底座（1）的内圈（3）用于支承保护静止的转轴，所述安装底座（1）的内圈（3）设有间隔设置的多个用于安装所述检测探头（2）的凹槽（4）；所述检测探头（2）与所述凹槽（4）一一对应，所述检测探头（2）朝向所述安装底座（1）内部的端面位于所述凹槽（4）内部。上述转轴保护及径向位移检测结构将轴承保护以及径向位移检测结构集成在一起，结构紧凑，体积减小，便于后续磁悬浮电机装配。

Description

转轴保护及径向位移检测结构、磁悬浮电机及家用空调
本申请要求于2017年06月15日提交中国专利局、申请号为2017206980534、实用新型名称为“转轴保护及径向位移检测结构、磁悬浮电机及家用空调”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
本实用新型涉及磁悬浮技术领域，尤其涉及转轴保护及径向位移检测结构、磁悬浮电机及家用空调。
背景技术
小型电动机是最常见的将电能转化为机械能的形式，在家用电器和工业领域具有广泛的应用。传统的电动机主要包括电机定子部分、电机转子部分、转子支撑轴承以及机壳部分，电机定子部分与电机转子部分之间通过机械轴承联接或存在机械接触，因此电子转子运动过程中存在机械摩擦。机械摩擦不仅增加转子的摩擦阻力，使运动部件磨损，产生机械振动和噪声，而且会造成部件发热，使润滑剂性能变差，严重的会使电机气隙不均匀，绕组发热，温升增大，从而降低电机效能，最终缩短电机使用寿命。而且机械轴承需要润滑油来维持，这样既影响电机寿命又不利于设备的清洁，因此，为了实现超高转速运行和设备的长寿命、清洁无油必须在电动机中采用非接触式支撑方式，即磁悬浮支撑方式。
现有的磁悬浮电机转子轴的支撑通常需要径向磁悬浮轴承、径向位移传感器以及起浮环共同完成，径向磁悬浮轴承、径向位移传感器以及起浮环并列分布在转子轴上，占用空间大。
实用新型内容
(一)要解决的技术问题
本实用新型要解决的技术问题是解决现有技术磁悬浮电机中径向 位移传感器以及起浮环并列设置占用轴向空间大、增大磁悬浮电机整体体积问题。
(二)技术方案
为了解决上述技术问题，本实用新型提供了一种转轴保护及径向位移检测结构，包括安装底座以及多个检测探头，所述安装底座设置为环形，所述安装底座的内圈用于支承保护静止的转轴，所述安装底座的内圈设有间隔设置的多个用于安装所述检测探头的凹槽；所述检测探头与所述凹槽一一对应，所述检测探头朝向所述安装底座内部的端面位于所述凹槽内部。
根据本实用新型，所述检测探头设有4个，4个所述检测探头位于同一圆周上，且互相间隔90°。
根据本实用新型，所述检测探头为圆柱形，且检测探头的轴向位于所述安装底座的径向上。
根据本实用新型，所述凹槽设有第一开口和第二开口，所述第一开口位于所述安装底座的内圈，所述第二开口位于所述安装底座的侧面，用于所述检测探头的装入。
根据本实用新型，所述第一开口与所述第二开口相连通，所述凹槽与所述第二开口相对的一面为与所述检测探头相配合的圆弧面。
根据本实用新型，所述检测探头与所述凹槽的内表面粘接连接。
本实用新型还提供了一种磁悬浮电机，包括转子轴及上述的转轴保护及径向位移检测结构，所述转轴保护及径向位移检测结构套设于述转子轴的外侧。
本实用新型还提供了一种家用空调，包括压缩机，所述压缩机包括上述的磁悬浮电机。
(三)有益效果
本实用新型的上述技术方案与现有技术相比具有如下优点：本实用新型实施例中安装底座不仅作为检测探头的固定件形成用于检测转轴径向位移的径向位移传感器，而且检测探头整体设置在凹槽内部， 安装底座的内圈可以作为起浮环使用，转轴停止转动时转轴首先落到安装底座的内圈上，由于检测探头位于凹槽的内部，因此，并不会对检测探头造成任何影响。本实用新型实施例将轴承保护以及径向位移检测结构集成在一起，结构紧凑，减小体积，便于后续磁悬浮电机装配。
附图说明
图1是本实用新型实施例提供的转轴保护及径向位移检测结构的示意图；
图2是本实用新型实施例提供的转轴保护及径向位移检测结构的剖视图。
图中：1：安装底座；2：检测探头；3：内圈；4：凹槽；5：端面；6：圆弧面；7：第一开口；8：第二开口。
具体实施方式
为使本实用新型实施例的目的、技术方案和优点更加清楚，下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
为了实现磁悬浮电机中转子轴的径向位移检测通常设置径向位移传感器，为了保证磁悬浮电机的磁悬浮轴承能够顺利使转子轴浮起，并且使转子轴平稳停止，磁悬浮电机通常设置起浮环，起浮环的内径小于磁悬浮轴承的内径，以使转子轴顺利浮起。为使磁悬浮电机的结构紧凑，本实用新型实施例提供了一种转轴保护及径向位移检测的一体化结构，具体如下：
如图1所示，本实用新型实施例提供的转轴保护及径向位移检测结构包括安装底座1以及多个检测探头2，安装底座1设置为环形，安 装底座1的内圈3用于支承保护静止的转轴，安装底座1的内圈3设有间隔设置的多个用于安装检测探头2的凹槽4；检测探头2与凹槽4一一对应，检测探头2朝向安装底座1内部的端面5位于凹槽4内部。本实施例中以该结构应用于磁悬浮电机为例，转轴即为磁悬浮电机中的转子轴，当然该结构还可以应用于其他磁悬浮支撑转轴旋转的场合。本实用新型实施例中安装底座1不仅作为检测探头2的固定件形成用于检测转轴径向位移的径向位移传感器，而且检测探头2整体设置在凹槽4内部，安装底座1的内圈3可以作为起浮环使用，转轴停止转动时转轴首先落到安装底座1的内圈3上，由于检测探头2位于凹槽4的内部，因此，并不会对检测探头2造成任何影响。本实用新型实施例将支承保护以及径向位移检测结构集成在一起，结构紧凑，减小体积，便于后续磁悬浮电机装配。
优选地，本实施例中检测探头2设有4个，4个检测探头2位于同一圆周上，且互相间隔90°。4个检测探头2可以分别用来检测转轴的X轴正负方向以及Y轴正负方向的位移。
优选地，本实施例中凹槽4设有第二开口8和第二开口，第二开口8位于安装底座1的内圈3，第二开口位于安装底座1的侧面，用于检测探头2的装入。第二开口8作为检测探头2的检测口，透过第二开口8检测转轴的径向位移，第二开口的面积较大，便于检测探头2的装入，便于检测探头2与安装底座1的装配。具体地，本实施例检测探头2优选为圆柱形，且检测探头2的轴向位于所述安装底座1的径向上。优选地，本实施例中第二开口8与第二开口相连通，凹槽4与第二开口相对的一面为与检测探头2相配合的圆弧面6。圆弧面6与检测探头2的圆柱形表面贴合，使得检测探头2的固定较为稳定。具体地，本实施例中检测探头2与凹槽4的内表面粘接连接。
本实用新型实施例还提供了一种磁悬浮电机，包括转轴以及上述的转轴保护及径向位移检测结构，转轴保护及径向位移检测结构套设在转轴的外侧。磁悬浮电机的具体结构可以为现有的任意一种磁悬浮 电机径向位移传感器和起浮环由本实用新型的转轴保护及径向位移检测结构来替代。将该一体化结构应用于此磁悬浮电机上，减小了磁悬浮电机的体积，结构更加紧凑，并且便于磁悬浮电机的装配。
本实用新型还体用了一种家用空调，包括压缩机，压缩机包括上述的磁悬浮电机。提高了家用空调的使用寿命，降低了噪音，提高了系统性能。
最后应说明的是：以上实施例仅用以说明本实用新型的技术方案，而非对其限制；尽管参照前述实施例对本实用新型进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本实用新型各实施例技术方案的精神和范围。
工业实用性
本实用新型提供的转轴保护及径向位移检测结构，安装底座不仅作为检测探头的固定件形成用于检测转轴径向位移的径向位移传感器，而且检测探头整体设置在凹槽内部，安装底座的内圈可以作为起浮环使用，转轴停止转动时转轴首先落到安装底座的内圈上，由于检测探头位于凹槽的内部，因此，并不会对检测探头造成任何影响。将轴承保护以及径向位移检测结构集成在一起，结构紧凑，减小体积，便于后续磁悬浮电机装配，具有很强的工业实用性。

Claims (8)

  1. 一种转轴保护及径向位移检测结构，其特征在于：包括安装底座以及多个检测探头，所述安装底座设置为环形，所述安装底座的内圈用于支承保护静止的转轴，所述安装底座的内圈设有间隔设置的多个用于安装所述检测探头的凹槽；所述检测探头与所述凹槽一一对应，所述检测探头朝向所述安装底座内部的端面位于所述凹槽内部。
  2. 根据权利要求1所述的转轴保护及径向位移检测结构，其特征在于：所述检测探头设有4个，4个所述检测探头位于同一圆周上，且互相间隔90°。
  3. 根据权利要求1所述的转轴保护及径向位移检测结构，其特征在于：所述检测探头为圆柱形，且检测探头的轴向位于所述安装底座的径向上。
  4. 根据权利要求3所述的转轴保护及径向位移检测结构，其特征在于：所述凹槽设有第一开口和第二开口，所述第一开口位于所述安装底座的内圈，所述第二开口位于所述安装底座的侧面，用于所述检测探头的装入。
  5. 根据权利要求4所述的转轴保护及径向位移检测结构，其特征在于：所述第一开口与所述第二开口相连通，所述凹槽与所述第二开口相对的一面为与所述检测探头相配合的圆弧面。
  6. 根据权利要求1所述的转轴保护及径向位移检测结构，其特征在于：所述检测探头与所述凹槽的内表面粘接连接。
  7. 一种磁悬浮电机，其特征在于：包括转子轴及如权利要求1-6任一项所述的转轴保护及径向位移检测结构，所述转轴保护及径向位移检测结构套设于所述转子轴的外侧。
  8. 一种家用空调，其特征在于：包括压缩机，所述压缩机包括如权利要求7所述的磁悬浮电机。
PCT/CN2018/090216 2017-06-15 2018-06-07 转轴保护及径向位移检测结构、磁悬浮电机及家用空调 WO2018228262A1 (zh)

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CN109681749B (zh) * 2018-12-19 2020-04-24 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） 一种转子位置检测安装组件及磁悬轴承
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