WO2020125105A1 - Radial and axial combined sensor for magnetic bearing - Google Patents

Radial and axial combined sensor for magnetic bearing Download PDF

Info

Publication number
WO2020125105A1
WO2020125105A1 PCT/CN2019/106744 CN2019106744W WO2020125105A1 WO 2020125105 A1 WO2020125105 A1 WO 2020125105A1 CN 2019106744 W CN2019106744 W CN 2019106744W WO 2020125105 A1 WO2020125105 A1 WO 2020125105A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
collar
radial
sensor
axial
Prior art date
Application number
PCT/CN2019/106744
Other languages
French (fr)
Chinese (zh)
Inventor
林英哲
施陈莲
吴立华
董继勇
Original Assignee
南京磁谷科技有限公司
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 南京磁谷科技有限公司 filed Critical 南京磁谷科技有限公司
Publication of WO2020125105A1 publication Critical patent/WO2020125105A1/en

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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/008—Identification means, e.g. markings, RFID-tags; Data transfer 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
    • F16C32/0444—Details of devices to control the actuation of the electromagnets
    • F16C32/0446—Determination of the actual position of the moving member, e.g. details of sensors
    • 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
    • G01B21/06—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 specially adapted for measuring length or width of objects while moving

Definitions

  • the invention relates to a combined radial and axial sensor for magnetic suspension bearings.
  • 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 combined radial and axial sensor for a magnetic suspension bearing in order to solve the above-mentioned problems in the prior art.
  • the technical scheme adopted by the present invention includes: a combined radial and axial sensor for a magnetic levitation bearing, including a rotor, a rotor collar and a displacement sensor.
  • the rotor and rotor collar are made of materials with different electrical conductivity.
  • the end of the rotor is provided with a boss portion, the rotor collar is sleeved on the boss portion, and the interference fit between the rotor collar and the boss portion is formed, and the fitting seam at the junction of the rotor collar and the boss portion forms a reference line
  • the even number of displacement sensors are evenly distributed in the circumferential direction of the rotor, and the displacement sensor is located inside the boss portion, and the detection surface of the displacement sensor is arranged coaxially with the reference line.
  • the height of the rotor collar is equal to the thickness of the boss portion.
  • the radial displacement sensor is omitted, the structure is simple, and the space is saved;
  • the axial dimension of the rotor 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.
  • the combined radial and axial sensor of the present invention includes a rotor 1, a rotor collar 2 and a displacement sensor 3.
  • the rotor 1 and the rotor collar 2 are made of materials with different conductivities ,
  • a boss portion 11 is provided at the end of the rotor 1, a rotor collar 2 is sleeved on the boss portion 11, and the rotor collar 2 and the boss portion 11 have an interference fit, the height of the rotor collar 2 and the convexity
  • the thickness of the table portion 11 is equal.
  • the fitting seam at the junction of the rotor collar 2 and the boss portion 11 forms a reference line A. Even number of displacement sensors 3 are evenly distributed in the circumferential direction of the rotor 1, and the displacement sensor 3 is located inside the boss portion 11, the displacement sensor 3
  • the detection surface is set coaxially with the reference line A.
  • two or four displacement sensors 3 are provided.
  • the invention removes the original radial displacement sensor, evenly distributes 2 or 4 axial displacement sensors in a week, and adds a collar 2 to the rotor.
  • the conductivity of the collar material is different from that of the original rotor. It is two kinds of conductivity materials.
  • the size of the inner ring of the rotor collar coincides with the axis of the sensor. When the rotor position changes radially, the value of the sensor is too large or too small to determine the radial position of the rotor.

Abstract

Disclosed is a radial and axial combined sensor for a magnetic bearing. The combined sensor comprises a rotor (1), a rotor collar (2) and displacement sensors (3), wherein the rotor (1) and the rotor collar (2) are made of materials with different conductivities; the tail end of the rotor (1) is provided with a boss part (11), the rotor collar (2) is sleeved on the boss part (11), and the rotor collar (2) is in interference fit with the boss part (11); a fitting seam at the joint between the rotor collar (2) and the boss part (11) forms a base line (A); an even number of displacement sensors (3) are uniformly distributed in a circumferential direction of the rotor (1), and the displacement sensors (3) are located on an inner side of the boss part (11); and a detection face of the displacement sensors (3) is arranged coaxially with the base line (A). According to the combined sensor, a radial displacement sensor is omitted, such that the structure of a bearing is simple, space is saved, the axial dimensions of the rotor are reduced, and the natural frequency of the rotor is improved.

Description

用于磁悬浮轴承的径向与轴向的组合传感器Combined radial and axial sensor for magnetic bearing 技术领域：Technical field:
本发明涉及一种用于磁悬浮轴承的径向与轴向的组合传感器。The invention relates to a combined radial and axial sensor for magnetic suspension bearings.
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用于磁悬浮轴承的径向与轴向的组合传感器。The present invention is to provide a combined radial and axial sensor for a magnetic suspension bearing in order to solve the above-mentioned problems in the prior art.
本发明所采用的技术方案有：用于磁悬浮轴承的径向与轴向的组合传感器，包括转子、转子套环和位移传感器，所述转子与转子套环采用不同电导率的材料制成，在转子的末端设有凸台部，转子套环套设于凸台部上，且转子套环与凸台部之间过盈配合，转子套环与凸台部结合处的贴合缝形成基准线，偶数个位移传感器均布在转子的圆周方向上，且位移传感器位于凸台部的内侧，位移传感器的检测面与基准线同轴设置。The technical scheme adopted by the present invention includes: a combined radial and axial sensor for a magnetic levitation bearing, including a rotor, a rotor collar and a displacement sensor. The rotor and rotor collar are made of materials with different electrical conductivity. The end of the rotor is provided with a boss portion, the rotor collar is sleeved on the boss portion, and the interference fit between the rotor collar and the boss portion is formed, and the fitting seam at the junction of the rotor collar and the boss portion forms a reference line The even number of displacement sensors are evenly distributed in the circumferential direction of the rotor, and the displacement sensor is located inside the boss portion, and the detection surface of the displacement sensor is arranged coaxially with the reference line.
进一步地，所述位移传感器设有2个或者4个。Further, there are 2 or 4 displacement sensors.
进一步地，所述转子套环的高度与凸台部的厚度相等。Further, the height of the rotor collar is equal to the thickness of the boss portion.
本发明具有如下有益效果：The present invention has the following beneficial effects:
1、省去了径向位移传感器，使结构简单，节省了空间；1. The radial displacement sensor is omitted, the structure is simple, and the space is saved;
2、转子轴向尺寸缩短了，提高了转子的固有频率。2. The axial dimension of the rotor 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所示，本发明用于磁悬浮轴承的径向与轴向的组合传感器，包括转子1、转子套环2和位移传感器3，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的末端设有凸台部11，转子套环2套设于凸台部11上，且转子套环2与凸台部11之间过盈配合，转子套环2的高度与凸台部11的厚度相等。转子套环2与凸台部11结合处的贴合缝形成基准线A，偶数个位移传感器3均布在转子1的圆周方向上，且位移传感器3位于凸台部11的内侧，位移传感器3的检测面与基准线A同轴设置。As shown in FIG. 1, the combined radial and axial sensor of the present invention includes a rotor 1, a rotor collar 2 and a displacement sensor 3. The rotor 1 and the rotor collar 2 are made of materials with different conductivities , A boss portion 11 is provided at the end of the rotor 1, a rotor collar 2 is sleeved on the boss portion 11, and the rotor collar 2 and the boss portion 11 have an interference fit, the height of the rotor collar 2 and the convexity The thickness of the table portion 11 is equal. The fitting seam at the junction of the rotor collar 2 and the boss portion 11 forms a reference line A. Even number of displacement sensors 3 are evenly distributed in the circumferential direction of the rotor 1, and the displacement sensor 3 is located inside the boss portion 11, the displacement sensor 3 The detection surface is set coaxially with the reference line A.
本发明中位移传感器3设有2个或者4个。In the present invention, two or four displacement sensors 3 are provided.
本发明去掉了原来的径向位移传感器，一周均布2个或者4个轴向位移传感器，在转子上增加了一个套环2，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，转子套环内圈尺寸与传感器轴线重合，转子位置径向变动时，传感器的数值的偏大或偏小，判断转子的径向位置。The invention removes the original radial displacement sensor, evenly distributes 2 or 4 axial displacement sensors in a week, and adds a collar 2 to the rotor. The conductivity of the collar material is different from that of the original rotor. It is two kinds of conductivity materials. The size of the inner ring of the rotor collar coincides with the axis of the sensor. When the rotor position changes radially, the value of the sensor is too large or too small to determine the radial 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 a 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 (3)

  1. 用于磁悬浮轴承的径向与轴向的组合传感器，其特征在于：包括转子(1)、转子套环(2)和位移传感器(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)的末端设有凸台部(11)，转子套环(2)套设于凸台部(11)上，且转子套环(2)与凸台部(11)之间过盈配合，转子套环(2)与凸台部(11)结合处的贴合缝形成基准线(A)，偶数个位移传感器(3)均布在转子(1)的圆周方向上，且位移传感器(3)位于凸台部(11)的内侧，位移传感器(3)的检测面与基准线(A)同轴设置。A combined radial and axial sensor for magnetic levitation bearings, characterized by comprising a rotor (1), a rotor collar (2) and a displacement sensor (3), the rotor (1) and the rotor collar (2) It is made of materials with different conductivities. At the end of the rotor (1) is provided a boss portion (11), the rotor collar (2) is sleeved on the boss portion (11), and the rotor collar (2) and The interference fit between the boss parts (11), the fitting seam between the rotor collar (2) and the boss part (11) forms the reference line (A), and even number of displacement sensors (3) are evenly distributed on the rotor ( 1) In the circumferential direction, the displacement sensor (3) is located inside the boss portion (11), and the detection surface of the displacement sensor (3) is arranged coaxially with the reference line (A).
  2. 如权利要求1所述的用于磁悬浮轴承的径向与轴向的组合传感器，其特征在于：所述位移传感器(3)设有2个或者4个。The combined radial and axial sensor for magnetic bearing according to claim 1, characterized in that the displacement sensor (3) is provided with two or four.
  3. 如权利要求1所述的用于磁悬浮轴承的径向与轴向的组合传感器，其特征在于：所述转子套环(2)的高度与凸台部(11)的厚度相等。The combined radial and axial sensor for a magnetic levitation bearing according to claim 1, wherein the height of the rotor collar (2) is equal to the thickness of the boss portion (11).
PCT/CN2019/106744 2018-12-18 2019-09-19 Radial and axial combined sensor for magnetic bearing WO2020125105A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811559233.X 2018-12-18
CN201811559233.XA CN109505875A (en) 2018-12-18 2018-12-18 Radial direction and axial combination sensor for magnetic suspension bearing

Publications (1)

Publication Number Publication Date
WO2020125105A1 true WO2020125105A1 (en) 2020-06-25

Family

ID=65753841

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/106744 WO2020125105A1 (en) 2018-12-18 2019-09-19 Radial and axial combined sensor for magnetic bearing

Country Status (2)

Country Link
CN (1) CN109505875A (en)
WO (1) WO2020125105A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1818539A (en) * 2006-03-17 2006-08-16 清华大学 Method and sensor for measuring radial and axial displacement of synchronouslly rotation axis
CN104201935A (en) * 2014-08-06 2014-12-10 北京航空航天大学 Four-degrees-of-freedom magnetic suspension flywheel
CN205300548U (en) * 2016-01-12 2016-06-08 天津飞旋科技研发有限公司 Rotor axial displacement detecting system
CN205592183U (en) * 2016-05-05 2016-09-21 南京磁谷科技有限公司 Measure rotor structure of displacement volume from top to bottom
JP2017032384A (en) * 2015-07-31 2017-02-09 Ntn株式会社 Rotation detection device and bearing with rotation detection device
CN107968530A (en) * 2017-12-28 2018-04-27 南京磁谷科技有限公司 A kind of magnetic suspension motor radial-axial sensor integral type mounting structure
CN107979239A (en) * 2017-12-28 2018-05-01 南京磁谷科技有限公司 A kind of magnetic suspension motor radial transducer mounting structure
CN207719986U (en) * 2017-12-28 2018-08-10 南京磁谷科技有限公司 A kind of magnetic suspension motor radial transducer mounting structure
CN207719985U (en) * 2017-12-28 2018-08-10 南京磁谷科技有限公司 A kind of magnetic suspension motor radial-axial sensor integral type mounting structure
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
CN209371993U (en) * 2018-12-18 2019-09-10 南京磁谷科技有限公司 A kind of radial direction of magnetic suspension bearing and axial combination sensor structure
CN209430623U (en) * 2018-12-18 2019-09-24 南京磁谷科技有限公司 Radial direction and axial combination sensor for magnetic suspension bearing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1210507C (en) * 2003-11-14 2005-07-13 清华大学 Method for measuring axial displacement of electromagnet bearing rotor
JP2006207761A (en) * 2005-01-31 2006-08-10 Jtekt Corp Displacement detecting device for magnetic bearing device
CN106438698A (en) * 2016-11-21 2017-02-22 南京磁谷科技有限公司 Winding framework type assembling structure for magnetic bearing
CN106402158A (en) * 2016-11-21 2017-02-15 南京磁谷科技有限公司 Radial magnetic bearing and sensor bracket split structure
CN106595728B (en) * 2016-12-13 2019-12-20 西安交通大学 Radial integrated measurement method for axial displacement, rotating speed and inclination angle of rotor
CN108757735A (en) * 2018-08-30 2018-11-06 南京磁谷科技有限公司 A kind of compound axle sleeve structure of magnetic suspension motor rotor

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1818539A (en) * 2006-03-17 2006-08-16 清华大学 Method and sensor for measuring radial and axial displacement of synchronouslly rotation axis
CN104201935A (en) * 2014-08-06 2014-12-10 北京航空航天大学 Four-degrees-of-freedom magnetic suspension flywheel
JP2017032384A (en) * 2015-07-31 2017-02-09 Ntn株式会社 Rotation detection device and bearing with rotation detection device
CN205300548U (en) * 2016-01-12 2016-06-08 天津飞旋科技研发有限公司 Rotor axial displacement detecting system
CN205592183U (en) * 2016-05-05 2016-09-21 南京磁谷科技有限公司 Measure rotor structure of displacement volume from top to bottom
CN107979239A (en) * 2017-12-28 2018-05-01 南京磁谷科技有限公司 A kind of magnetic suspension motor radial transducer mounting structure
CN107968530A (en) * 2017-12-28 2018-04-27 南京磁谷科技有限公司 A kind of magnetic suspension motor radial-axial sensor integral type mounting structure
CN207719986U (en) * 2017-12-28 2018-08-10 南京磁谷科技有限公司 A kind of magnetic suspension motor radial transducer mounting structure
CN207719985U (en) * 2017-12-28 2018-08-10 南京磁谷科技有限公司 A kind of magnetic suspension motor radial-axial sensor integral type mounting structure
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
CN209371993U (en) * 2018-12-18 2019-09-10 南京磁谷科技有限公司 A kind of radial direction of magnetic suspension bearing and axial combination sensor structure
CN209430623U (en) * 2018-12-18 2019-09-24 南京磁谷科技有限公司 Radial direction and axial combination sensor for magnetic suspension bearing

Also Published As

Publication number Publication date
CN109505875A (en) 2019-03-22

Similar Documents

Publication Publication Date Title
WO2020125104A1 (en) Combined sensor structure for magnetic bearing
WO2020125105A1 (en) Radial and axial combined sensor for magnetic bearing
DE602006014941D1 (en) CONNECTION ARRANGEMENT WITH CENTERING FLANGE
WO2020125101A1 (en) Radial and axial combined sensor structure of magnetic levitation bearing
MX2011009887A (en) Thermally decoupled bearing arrangement.
CN107968530A (en) A kind of magnetic suspension motor radial-axial sensor integral type mounting structure
CN201548252U (en) Axially adjustable eddy current sensor sealing connector
CN207719985U (en) A kind of magnetic suspension motor radial-axial sensor integral type mounting structure
WO2020125103A1 (en) Radial and axial combined sensor for magnetic suspension bearing
CN209371993U (en) A kind of radial direction of magnetic suspension bearing and axial combination sensor structure
WO2020006700A1 (en) Magnetic liquid sealing device adapted to axial and radial displacement at joint
CN207104260U (en) Cylinder sleeve press-loading apparatus with detection function
US20190234237A1 (en) Turbocharger
CN206889901U (en) A kind of pipe connecting structure that revolute pair is provided and can conveniently be dismantled
WO2020042998A2 (en) Composite shaft sleeve structure of magnetic levitation motor rotor
CN207719986U (en) A kind of magnetic suspension motor radial transducer mounting structure
CN206770412U (en) Permanent magnetism type magnetic suspension bearing
CN107331981A (en) Can electrical bonding floating location pin
US2467994A (en) Pillow block
CN209430623U (en) Radial direction and axial combination sensor for magnetic suspension bearing
JPS6342180Y2 (en)
KR20150110478A (en) Seal assembly and neck seal for rolling mill
KR20000048010A (en) Encoder wheel for a roller bearing
CN104329379B (en) A kind of dirt-proof bearing
JP2016504201A5 (en)

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: 19898066

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: 19898066

Country of ref document: EP

Kind code of ref document: A1