WO2020125101A1 - Radial and axial combined sensor structure of magnetic levitation bearing - Google Patents

Radial and axial combined sensor structure of magnetic levitation bearing Download PDF

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Publication number
WO2020125101A1
WO2020125101A1 PCT/CN2019/106739 CN2019106739W WO2020125101A1 WO 2020125101 A1 WO2020125101 A1 WO 2020125101A1 CN 2019106739 W CN2019106739 W CN 2019106739W WO 2020125101 A1 WO2020125101 A1 WO 2020125101A1
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Prior art keywords
rotor
mounting
sensor
axial
radial
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PCT/CN2019/106739
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French (fr)
Chinese (zh)
Inventor
林英哲
刘淑云
吴立华
董继勇
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南京磁谷科技有限公司
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Publication of WO2020125101A1 publication Critical patent/WO2020125101A1/en

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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
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • 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

Definitions

  • the invention relates to a combined radial and axial sensor structure of a magnetic suspension bearing.
  • the radial and axial displacement changes of the rotor 1 require two sensors (see FIG. 2).
  • Four radial displacement sensors are evenly distributed on the circumference of the rotor 1 to detect the radial direction of the rotor position.
  • An axial displacement sensor is installed at one end of the rotor 1 to detect the axial position of the rotor. Using two sensors will increase the axial installation space of the rotor 1 and increase the axial length of the rotor.
  • the present invention is to provide a radial and axial combined sensor structure of a magnetic levitation bearing in order to solve the problems in the prior art.
  • the technical scheme adopted by the present invention includes: a combined radial and axial sensor structure of a magnetic levitation bearing, including a rotor, a rotor collar, a displacement sensor, and a round-shaped sensor mounting seat.
  • the rotor and the rotor collar are different.
  • the material is made of electrical conductivity.
  • the rotor is provided with a boss portion, and the boss is provided with an installation step.
  • the rotor sleeve is sleeved on the installation step, and the rotor sleeve and the installation step are interference fit.
  • the rotor One end surface of the collar is in contact with the step surface of the installation step, and the fitting seam between the end surface of the rotor collar and the step surface of the installation step forms a reference line, and the other end surface of the rotor collar is flush with the step surface of the boss portion ,
  • the outer circumferential surface of the rotor collar is flush with the outer circumferential surface of the boss;
  • the sensor mounting seat is coaxially sleeved in the circumferential direction of the boss portion, and there are four mounting holes uniformly distributed in the circumferential direction of the sensor mounting seat, and the axis of the mounting hole is coaxial with the reference line; within each mounting hole Set up a displacement sensor, and make the displacement sensor coaxial with the reference line.
  • the installation hole is filled with potting glue.
  • the axial displacement sensor is omitted, the structure is simple, and the space is saved;
  • the rotor structure is simple, the axial length is shortened, and the natural frequency of the rotor is increased.
  • Figure 1 is a structural diagram of the present invention.
  • FIG. 2 is an arrangement diagram of a radial displacement sensor and an axial displacement sensor around the rotor in the prior art.
  • a radial and axial combined sensor structure of a magnetic suspension bearing of the present invention includes a rotor 1, a rotor collar 2, a sensor mounting base 3, and a displacement sensor 4.
  • the rotor 1 and the rotor collar 2 use different electrical conductivity Made of the material, the boss portion 11 is provided on the rotor 1, the mounting step 12 is provided on the boss portion 11, the rotor collar 2 is sleeved on the mounting step 12, and the rotor collar 2 and the mounting step 12 are Interference fit.
  • the left end surface of the rotor collar 2 abuts on the step surface of the mounting step 12, and the fitting seam between the left end surface of the rotor collar 2 and the step surface of the mounting step 12 forms the reference line A.
  • the right end surface of the rotor collar 2 is flush with the stepped surface of the boss portion 11 (that is, the length of the rotor collar 2 is equal to the length of the mounting step 12), the outer circumferential surface of the rotor collar 2 and the outer circumference of the boss portion 11 The surfaces are flush (that is, the thickness of the rotor collar 2 is equal to the depth of the mounting step 12).
  • the sensor mounting base 3 has a circular shape, and the sensor mounting base 3 is coaxially sleeved in the circumferential direction of the boss portion 11, and four mounting holes 31 are uniformly distributed in the circumferential direction of the sensor mounting base 3, and the axis of the mounting hole 31 is
  • the reference line A is coaxially arranged.
  • a displacement sensor 4 is provided in each mounting hole 31, and the displacement sensor 4 is arranged coaxially with the reference line A.
  • the potting glue is filled in the mounting hole 31.
  • the invention combines the axial displacement sensor and the radial displacement sensor, and the radial displacement sensor has the function of the axial displacement sensor.
  • the original axial displacement sensor is removed, and a ring is added to the rotor.
  • the conductivity of the material of the ring is different from that of the original rotor. They are two kinds of conductivity materials.
  • One end of the rotor ring and the step surface of the mounting step 12 Close contact, the contact position coincides with the axis of the radial displacement sensor.
  • the value of all sensors is too large or too small to determine the axial position of the rotor.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

A radial and axial combined sensor structure of a magnetic levitation bearing. A rotor (1) and a rotor sleeve ring (2) are made from materials of different electric conductivities. A protruding mesa part (11) is provided on the rotor (1). A mounting step (12) is provided on the protruding mesa part (11). The rotor sleeve ring (2) is sleeved on the mounting step (12); moreover, the rotor sleeve ring (2) is interference fitted with the mounting step (12). One end surface of the rotor sleeve ring (2) is abutted against the step surface of the mounting step (12); moreover, a fitting gap between the end surface of the rotor sleeve ring (2) and the step surface of the mounting step (12) forms a baseline (A). A sensor mounting base (3) is coaxially sleeved in the circumferential direction of the protruding mesa part (11). Four mounting holes (31) are evenly distributed in the circumferential direction of the sensor mounting base (3). The axial lines of the mounting holes (31) are coaxially provided with the baseline (A). Each mounting hole (31) is provided therein with one displacement sensor (4), and, the displacement sensors (4) are coaxially provided with the baseline (A). The sensor structure is simple, obviates an axial displacement sensor, shortens the axial length, saves space, and increases the inherent frequency of the rotor (1).

Description

一种磁悬浮轴承的径向与轴向的组合传感器结构Radial and axial combined sensor structure of magnetic suspension bearing 技术领域：Technical field:
本发明涉及一种磁悬浮轴承的径向与轴向的组合传感器结构。The invention relates to a combined radial and axial sensor structure of a magnetic suspension bearing.
背景技术：Background technique:
现有的磁悬浮轴承中转子1的径向与轴向的位移变化需要用到两种传感器(如图2)，在转子1的圆周均布4个径向位移传感器，用以检测转子的径向位置。在转子1一端安装一个轴向位移传感器，用以检测转子的轴向位置。采用两个传感器，会使得转子1的轴向安装空间变大，增加转子轴向长度。In the existing magnetic levitation bearing, the radial and axial displacement changes of the rotor 1 require two sensors (see FIG. 2). Four radial displacement sensors are evenly distributed on the circumference of the rotor 1 to detect the radial direction of the rotor position. An axial displacement sensor is installed at one end of the rotor 1 to detect the axial position of the rotor. Using two sensors will increase the axial installation space of the rotor 1 and increase the axial length of the rotor.
发明内容：Summary of the invention:
本发明是为了解决上述现有技术存在的问题而提供一种磁悬浮轴承的径向与轴向的组合传感器结构。The present invention is to provide a radial and axial combined sensor structure of a magnetic levitation bearing in order to solve the problems in the prior art.
本发明所采用的技术方案有：一种磁悬浮轴承的径向与轴向的组合传感器结构，包括转子、转子套环、位移传感器和圆形状的传感器安装座，所述转子与转子套环采用不同电导率的材料制成，在转子上设有凸台部，在凸台部上设有安装台阶，转子套环套设于安装台阶上，且转子套环与安装台阶之间过盈配合，转子套环的一端面抵触于安装台阶的台阶面上，且转子套环端面与安装台阶台阶面之间的贴合缝形成基准线，转子套环的另一端面与凸台部的台阶面相齐平，转子套环的外圆周面与凸台部的外圆周面相齐平；The technical scheme adopted by the present invention includes: a combined radial and axial sensor structure of a magnetic levitation bearing, including a rotor, a rotor collar, a displacement sensor, and a round-shaped sensor mounting seat. The rotor and the rotor collar are different. The material is made of electrical conductivity. The rotor is provided with a boss portion, and the boss is provided with an installation step. The rotor sleeve is sleeved on the installation step, and the rotor sleeve and the installation step are interference fit. The rotor One end surface of the collar is in contact with the step surface of the installation step, and the fitting seam between the end surface of the rotor collar and the step surface of the installation step forms a reference line, and the other end surface of the rotor collar is flush with the step surface of the boss portion , The outer circumferential surface of the rotor collar is flush with the outer circumferential surface of the boss;
传感器安装座同轴套设在凸台部的圆周方向上，在传感器安装座的圆周方向均布有四个安装孔，安装孔的轴线与所述基准线同轴设置；在每个安装孔内设置一个位移传感器，并使得位移传感器与基准线同轴设置。The sensor mounting seat is coaxially sleeved in the circumferential direction of the boss portion, and there are four mounting holes uniformly distributed in the circumferential direction of the sensor mounting seat, and the axis of the mounting hole is coaxial with the reference line; within each mounting hole Set up a displacement sensor, and make the displacement sensor coaxial with the reference line.
进一步地，所述安装孔内填充灌封胶。Further, the installation hole is filled with potting glue.
本发明具有如下有益效果：The present invention has the following beneficial effects:
1、省去了轴向位移传感器，使结构简单，节省了空间；1. The axial displacement sensor is omitted, the structure is simple, and the space is saved;
2、转子结构简单了，缩短了轴向长度，提高了转子的固有频率。2. The rotor structure is simple, the axial length is shortened, and the natural frequency of the rotor is increased.
附图说明：BRIEF DESCRIPTION OF THE DRAWINGS:
图1为本发明结构图。Figure 1 is a structural diagram of the present invention.
图2为本现有技术中转子周围径向位移传感器与轴向位移传感器的布置图。2 is an arrangement diagram of a radial displacement sensor and an axial displacement sensor around the rotor in the prior art.
具体实施方式：detailed description:
下面结合附图对本发明作进一步的说明。The present invention will be further described below with reference to the drawings.
如图1，本发明一种磁悬浮轴承的径向与轴向的组合传感器结构，包括转子1、转子套环2、传感器安装座3和位移传感器4，转子1与转子套环2采用不同电导率的材料制成，在转子1上设有凸台部11，在凸台部11上设有安装台阶12，转子套环2套设于安装台阶12上，且转子套环2与安装台阶12之间过盈配合。As shown in FIG. 1, a radial and axial combined sensor structure of a magnetic suspension bearing of the present invention includes a rotor 1, a rotor collar 2, a sensor mounting base 3, and a displacement sensor 4. The rotor 1 and the rotor collar 2 use different electrical conductivity Made of the material, the boss portion 11 is provided on the rotor 1, the mounting step 12 is provided on the boss portion 11, the rotor collar 2 is sleeved on the mounting step 12, and the rotor collar 2 and the mounting step 12 are Interference fit.
转子套环2的左侧端面抵触于安装台阶12的台阶面上，且转子套环2左侧端面与安装台阶12台阶面之间的贴合缝形成基准线A。转子套环2的右端面与凸台部11的台阶面相齐平(即转子套环2的长度与安装台阶12的长度相等)，转子套环2的外圆周面与凸台部11的外圆周面相齐平(即转子套环2的厚度与安装台阶12的深度相等)。The left end surface of the rotor collar 2 abuts on the step surface of the mounting step 12, and the fitting seam between the left end surface of the rotor collar 2 and the step surface of the mounting step 12 forms the reference line A. The right end surface of the rotor collar 2 is flush with the stepped surface of the boss portion 11 (that is, the length of the rotor collar 2 is equal to the length of the mounting step 12), the outer circumferential surface of the rotor collar 2 and the outer circumference of the boss portion 11 The surfaces are flush (that is, the thickness of the rotor collar 2 is equal to the depth of the mounting step 12).
传感器安装座3为圆形状，传感器安装座3同轴套设在凸台部11的圆周方向上，在传感器安装座3的圆周方向均布有四个安装孔31，安装孔31的轴线与所述基准线A同轴设置。在每个安装孔31内设置一个位移传感器4，并使得位移传感器4与基准线A同轴设置。The sensor mounting base 3 has a circular shape, and the sensor mounting base 3 is coaxially sleeved in the circumferential direction of the boss portion 11, and four mounting holes 31 are uniformly distributed in the circumferential direction of the sensor mounting base 3, and the axis of the mounting hole 31 is The reference line A is coaxially arranged. A displacement sensor 4 is provided in each mounting hole 31, and the displacement sensor 4 is arranged coaxially with the reference line A.
在安装孔31内填充灌封胶。The potting glue is filled in the mounting hole 31.
本发明将轴向位移传感器与径向位移传感器合并，用径向位移传感器兼具轴向位移传感器的功能。The invention combines the axial displacement sensor and the radial displacement sensor, and the radial displacement sensor has the function of the axial displacement sensor.
去掉了原来的轴向位移传感器，转子上增加了一个套环，套环材料的电导率与原来转子的材料的电导率不同，是两种电导率材料，转子套环一端与安装台阶12台阶面紧密接触，接触位置与径向位移传感器的轴线重合，转子位置轴向变动时，所有传感器的数值的偏大或偏小，判断转子的轴向位置。The original axial displacement sensor is removed, and a ring is added to the rotor. The conductivity of the material of the ring is different from that of the original rotor. They are two kinds of conductivity materials. One end of the rotor ring and the step surface of the mounting step 12 Close contact, the contact position coincides with the axis of the radial displacement sensor. When the rotor position changes axially, the value of all sensors is too large or too small to determine the axial position of the rotor.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员 来说，在不脱离本发明原理的前提下还可以作出若干改进，这些改进也应视为本发明的保护范围。The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, several improvements can be made without departing from the principles of the present invention, and these improvements should also be regarded as protected range.

Claims (2)

  1. 一种磁悬浮轴承的径向与轴向的组合传感器结构，其特征在于：包括转子(1)、转子套环(2)、位移传感器(4)和圆形状的传感器安装座(3)，A radial and axial combined sensor structure of a magnetic levitation bearing is characterized in that it includes a rotor (1), a rotor collar (2), a displacement sensor (4) and a circular sensor mounting seat (3),
    所述转子(1)与转子套环(2)采用不同电导率的材料制成，在转子(1)上设有凸台部(11)，在凸台部(11)上设有安装台阶(12)，转子套环(2)套设于安装台阶(12)上，且转子套环(2)与安装台阶(12)之间过盈配合，转子套环(2)的一端面抵触于安装台阶(12)的台阶面上，且转子套环(2)端面与安装台阶(12)台阶面之间的贴合缝形成基准线(A)，转子套环(2)的另一端面与凸台部(11)的台阶面相齐平，转子套环(2)的外圆周面与凸台部(11)的外圆周面相齐平；The rotor (1) and the rotor collar (2) are made of materials with different electrical conductivities, a boss portion (11) is provided on the rotor (1), and an installation step is provided on the boss portion (11) 12), the rotor collar (2) is sleeved on the installation step (12), and the interference fit between the rotor collar (2) and the installation step (12), one end face of the rotor collar (2) is against the installation The step surface of the step (12), and the fitting seam between the end surface of the rotor collar (2) and the step surface of the mounting step (12) forms a reference line (A), and the other end surface of the rotor collar (2) The stepped surface of the table portion (11) is flush with each other, and the outer circumferential surface of the rotor collar (2) is flush with the outer circumferential surface of the boss portion (11);
    传感器安装座(3)同轴套设在凸台部(11)的圆周方向上，在传感器安装座(3)的圆周方向均布有四个安装孔(31)，安装孔(31)的轴线与所述基准线(A)同轴设置；在每个安装孔(31)内设置一个位移传感器(4)，并使得位移传感器(4)与基准线(A)同轴设置。The sensor mounting seat (3) is coaxially sleeved on the circumferential direction of the boss portion (11), and four mounting holes (31) are uniformly distributed in the circumferential direction of the sensor mounting seat (3), the axis of the mounting hole (31) It is arranged coaxially with the reference line (A); a displacement sensor (4) is arranged in each mounting hole (31), and the displacement sensor (4) is arranged coaxially with the reference line (A).
  2. 如权利要求1所述的磁悬浮轴承的径向与轴向的组合传感器结构，其特征在于：所述安装孔(31)内填充灌封胶。The combined radial and axial sensor structure of the magnetic levitation bearing according to claim 1, wherein the mounting hole (31) is filled with potting glue.
PCT/CN2019/106739 2018-12-18 2019-09-19 Radial and axial combined sensor structure of magnetic levitation bearing WO2020125101A1 (en)

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CN109458919A (en) * 2018-12-18 2019-03-12 南京磁谷科技有限公司 A kind of radial direction of magnetic suspension bearing and axial combination sensor structure
CN109505875A (en) * 2018-12-18 2019-03-22 南京磁谷科技有限公司 Radial direction and axial combination sensor for magnetic suspension bearing

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