KR20100045719A - Stiffness measurement apparatus of super conductor bearing - Google Patents

Stiffness measurement apparatus of super conductor bearing Download PDF

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Publication number
KR20100045719A
KR20100045719A KR1020080104795A KR20080104795A KR20100045719A KR 20100045719 A KR20100045719 A KR 20100045719A KR 1020080104795 A KR1020080104795 A KR 1020080104795A KR 20080104795 A KR20080104795 A KR 20080104795A KR 20100045719 A KR20100045719 A KR 20100045719A
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South Korea
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cylindrical shaft
load cell
permanent magnet
vacuum chamber
superconducting bearing
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KR1020080104795A
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Korean (ko)
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박병준
한영희
정세용
이정필
성태현
정년호
박병철
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한국전력공사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G21/00—Details of weighing apparatus
    • G01G21/02—Arrangements of bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/40—Investigating hardness or rebound hardness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/269—Various geometry objects
    • G01N2291/2696—Wheels, Gears, Bearings

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

PURPOSE: A stiffness measurement apparatus for a super conductor bearing is provided to measure the retaining force of a superconductor shown under the critical temperature according to the vibration of a magnetic structure supported by the superconductor. CONSTITUTION: A stiffness measurement apparatus for a super conductor bearing comprises a cylindrical shaft(3), a corrugated pipe(5), a load cell(6), a permanent magnet(8) and an insulating jig(9). The cylindrical shaft is connected to an actuator(1) with a both-sided bolt. The corrugated pipe is interposed on a top plate(4a) of a vacuum chamber(4) by being inserted in the cylindrical shaft. The load cell is connected to the cylindrical shaft extended to the inside of the vacuum chamber. The permanent magnet is located on the permanent magnet arranged in the vacuum chamber. The insulation jig connects the load cell and the permanent magnet.

Description

초전도 베어링의 강성측정장치{Stiffness measurement apparatus of super conductor bearing}Stiffness measurement apparatus of super conductor bearing

본 발명은 초전도 베어링의 강성측정장치에 관한 것으로, 더욱 상세하게는 초전도체가 지지하고 있는 자석 구조물의 진동에 따라 임계온도 하에서 보여주는 초전도체의 고정력을 측정하기 위한 초전도 베어링의 강성측정장치에 관한 것이다.The present invention relates to a stiffness measuring device of a superconducting bearing, and more particularly, to a stiffness measuring device of a superconducting bearing for measuring the holding force of the superconductor exhibited under a critical temperature according to the vibration of a magnet structure supported by the superconductor.

임계온도 하에서 초전도 베어링은 주변 자장변화에 의하여 민감하게 강성이 변하는데, 특히 자석의 위치변화 및 흔들림에 따라서 큰 자기변화를 일으키게 된다.Under critical temperature, superconducting bearings are sensitively changed in stiffness by the change of the surrounding magnetic field, and in particular, they cause a large magnetic change according to the position change and shaking of the magnet.

하지만 자석의 심한 흔들림에 따른 정확한 강성변화를 측정할 방법이 부족하여 초전도 베어링의 정확한 강성설계가 부족하였다.However, the accurate stiffness design of the superconducting bearings was insufficient due to the lack of a method for measuring the exact stiffness change due to the severe shaking of the magnet.

또한, 종래 초전도 베어링의 강성평가를 극저온 상태에서 이루어져야 하기 때문에 베어링을 구성하는 일부 초전도체만을 분리하여 강성을 평가하여 베어링 성능을 예측하거나, 또 진공 중에 측정하였더라도 조건 변경시마다 매번 진공상태를 꺼야하는 번거로움이 있었으며, 작동기(Actuator)를 이용하여 동적(Dynamic)특성을 평가할 때는 고진동으로 인하여 일정한 진공유지가 곤란하였다.In addition, the rigidity evaluation of the conventional superconducting bearing should be performed in a cryogenic state, so only a part of the superconductor constituting the bearing must be separated to evaluate the rigidity, and the bearing performance can be predicted. When evaluating dynamic characteristics using an actuator, it was difficult to maintain a constant vacuum due to high vibration.

이에 따라 복잡한 초전도 베어링의 평가측정에서는 느린 응답속도 및 주변 지지물의 노이즈 생성으로 인하여 효율적인 베어링 강성의 전달이 안되었다.As a result, the evaluation of complex superconducting bearings failed to deliver efficient bearing stiffness due to the slow response speed and noise generation of surrounding supports.

이에 본 발명은 상기와 같은 종래 문제점을 감안하여 제안된 것으로, 로드셀을 실제 운전상태와 같은 고진공 분위기로 유지하기 위하여 튜브형 연결 파이프관을 사용하여 강성 응답속도 거리를 최소화함으로써 정확한 베어링 강성전달과 더불어, 온도와 습도에 의한 환경변화 및 대기저항에 의한 영향을 최소화함으로써 재현성 있는 측정이 가능함에 따라 초전도 베어링 강성을 정확히 예측하고 설계할 수 있는 데이타를 제공하는 초전도 베어링의 강성측정장치를 제시함에 그 목적이 있다.Therefore, the present invention has been proposed in view of the above-mentioned conventional problems, and in addition to accurate bearing rigidity transmission by minimizing the stiffness response distance by using a tubular connection pipe in order to maintain the load cell in a high vacuum atmosphere such as an actual operating state, The purpose of this study is to present a stiffness measuring device for superconducting bearings that provides accurate data for predicting and designing superconducting bearing stiffness by minimizing the effects of temperature and humidity on environmental changes and atmospheric resistance. have.

상기와 같은 목적을 달성하기 위한 본 발명은 작동기와 양면 볼트를 매개로 원통형 축과, 이 원통형 축에 끼워져서 진공챔버의 상부판에 게재되는 스프링 형태의 주름관 파이프, 상기 진공챔버 내부로 연장된 원통형 축에 연결되는 로드셀, 상기 진공챔버에 배치되는 측정체인 초전도 베어링 위에 위치한 영구자석 및, 상기 로드셀과 영구자석 사이를 연결하는 단열지그를 갖추어 이루어져 있다.The present invention for achieving the above object is a cylindrical shaft through the actuator and the double-sided bolt, the spring-shaped corrugated pipe pipe is inserted into the cylindrical shaft and placed on the upper plate of the vacuum chamber, the cylindrical extending into the vacuum chamber A load cell connected to the shaft, a permanent magnet located on the superconducting bearing which is a measuring body disposed in the vacuum chamber, and a heat insulating jig connecting the load cell and the permanent magnet.

상기와 같은 본 발명은 초전도 베어링의 강성측정시 정확한 측정이 가능하고, 효율적인 초전도 베어링 설계에 필요한 정확한 데이타를 제공할 수 있는 이점을 갖는다.The present invention as described above has the advantage that can be accurately measured when measuring the stiffness of the superconducting bearing, and can provide accurate data necessary for efficient superconducting bearing design.

이하, 본 발명을 첨부된 예시도면에 의거 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 초전도 베어링의 강성을 측정하는 장치의 설치상태를 나타낸 구성도이고, 도 2는 도 1의 부분 단면도이다.1 is a configuration diagram showing an installation state of a device for measuring the rigidity of the superconducting bearing according to the present invention, Figure 2 is a partial cross-sectional view of FIG.

본 발명은 진공챔버(4) 내에서 측정하고자 하는 초전도 베어링(7)의 강성을 측정하는 로드셀(6)과 이 초전도 베어링(7)에 진동을 가하는 작동기(1)의 연결부위에 주름 튜브형 연결부재(10)를 이용하여 진공챔버(4)의 진공상태에서 이 초전도 베어링(7)의 강성을 측정하도록 되어 있는 초전도 베어링의 강성측정장치 이다.The present invention relates to a corrugated tubular connection member at a connection portion of a load cell (6) for measuring the rigidity of a superconducting bearing (7) to be measured in the vacuum chamber (4) and an actuator (1) for vibrating the superconducting bearing (7). The stiffness measuring device of the superconducting bearing which measures the rigidity of this superconducting bearing 7 in the vacuum state of the vacuum chamber 4 using (10).

이러한 본 발명은 작동기(1)와 양면 볼트(2)를 매개로 연결되는 원통형 축(3)과, 이 원통형 축(3)에 끼워져서 진공챔버(4)의 상부판(4a)에 게재되는 스프링 형태의 주름관 파이프(5), 상기 진공챔버(4) 내부로 연장된 원통형 축(3)에 연결되는 로드셀(6), 상기 진공챔버(4) 내에 배치되는 측정체인 초전도 베어링(7) 위에 위치한 영구자석(8) 및, 상기 로드셀(6)과 영구자석(8) 사이를 연결하는 단열지그(9)를 갖추어 이루어진 구조로 되어 있다.The present invention has a cylindrical shaft (3) connected via an actuator (1) and a double-sided bolt (2), and a spring fitted to the cylindrical shaft (3) and placed on the upper plate (4a) of the vacuum chamber (4). A corrugated pipe 5 of the form, a load cell 6 connected to the cylindrical shaft 3 extending into the vacuum chamber 4, a permanently positioned superconducting bearing 7 which is a measurement body disposed in the vacuum chamber 4 A magnet 8 and a heat insulating jig 9 for connecting between the load cell 6 and the permanent magnet 8 are provided.

여기서 상기 작동기(1)와 로드셀(6) 사이에 배치되는 주름 튜브형 연결부재(10)는 원통형 축(3)과 이 원통형 축(3)에 끼워진 스프링 형태의 주름관 파이프(5)로 이루어져 있다.The corrugated tube-shaped connecting member 10 disposed between the actuator 1 and the load cell 6 here consists of a cylindrical shaft 3 and a corrugated pipe 5 in the form of a spring fitted to the cylindrical shaft 3.

이에 따라 본 발명은 작동기(1)에서 전달된 진동이 초전도 베어링(7)까지 효율적으로 전달되어 이 초전도 베어링(7)에 존재하는 피닝 포스(Pining force)의 변화를 로드셀(6)의 하중으로 받아 강성을 측정할 수 있다.Accordingly, the present invention efficiently transmits the vibration transmitted from the actuator 1 to the superconducting bearing 7 to receive the change of the pinning force present in the superconducting bearing 7 as the load of the load cell 6. Stiffness can be measured.

본 발명에서의 초전도 베어링(7)은 진공챔버(4)의 진공 중에 효율적으로 임 계온도 이하에서 냉각될 수 있도록 간접 냉각방식을 사용하며, 상기 영구자석(8)은 초전도 베어링(7)과 같은 간격을 유지하며 착자되는 것이 바람직하다.Superconducting bearing (7) in the present invention uses an indirect cooling method to be efficiently cooled below the threshold temperature in the vacuum of the vacuum chamber (4), the permanent magnet 8 is the same as the superconducting bearing (7) It is desirable to magnetize while keeping the spacing.

그리고 상기 주름 튜브형 연결부재(10)는 원통형 축(3)과 스프링 타입의 주름관 파이프(5)로 이루어져 있으며 진공을 유지하기 위해 공지의 오링 및 가스켓을 이용하여 밀봉을 유지하고, 상기 작동기(1)와 주름 튜브형 연결부재(10)의 원통형 축(3) 사이에는 양면 볼트(2)를 이용하여 체결하며, 상기 주름관 파이프(5)는 진동의 최대 진폭을 고려하여 그 크기를 결정하도록 되어 있다.And the corrugated tubular connecting member 10 is composed of a cylindrical shaft (3) and a spring type corrugated pipe (5) and maintains the seal using a known O-ring and gasket to maintain a vacuum, the actuator (1) And the cylindrical shaft 3 of the corrugated tubular connecting member 10 are fastened using a double-sided bolt 2, and the corrugated pipe 5 is determined in consideration of the maximum amplitude of the vibration.

또한, 상기 작동기(1)와 주름 튜브형 연결부재(10)가 어느 일정길이 이상이 되면, 관성 및 프랙션(Fraction)에 의하여 정확한 작동기(1)의 진동 전달이 곤란하므로 진공챔버(4)의 하부보다는 상부쪽으로 주름 튜브형 연결부재(10)를 장착하는 것이 바람직하다.In addition, when the actuator 1 and the corrugated tubular connecting member 10 are longer than a certain length, it is difficult to accurately transmit the vibration of the actuator 1 by inertia and friction, so that the lower portion of the vacuum chamber 4 Rather, it is preferable to mount the corrugated tubular connecting member 10 toward the upper side.

상기 초전도 베어링(7)과 영구자석(8) 및 로드셀(6)은 동일축선 상에 연결되어 있으며, 자력선 및 열전달에 의한 로드셀(6)의 데미지를 피하기 위하여 이 영구자석(8)과 로드셀(6) 사이의 거리를 단열지그(9)가 사용되어 일정한 간격을 유지하면서 보호하도록 되어 있다.The superconducting bearing 7, the permanent magnet 8, and the load cell 6 are connected on the same axis, and the permanent magnet 8 and the load cell 6 in order to avoid damage of the load cell 6 by magnetic force lines and heat transfer. Insulation jig 9 is used to protect the distance between the gaps while maintaining a constant gap.

본 발명은 스프링 타입의 주름관 파이프(5)를 이용하여 로드셀(6)을 진공챔버(4) 내에 장착하였기 때문에 평가측정을 할 때마다 진공도를 효과적으로 제어할 수 있고, 상기 로드셀(6)의 위치가 초전도 베어링(7)과 가까워지면서 전달되는 강성 응답속도 거리를 최소화 할 수 있기 때문에 정확한 초전도 베어링(7)의 강성전달과 더불어, 온도와 습도에 의한 환경변화 및 대기저항에 의한 영향을 받지 않고 재현성 있는 측정이 가능하여 정확한 측정 데이타를 얻을 수 있다.According to the present invention, since the load cell 6 is mounted in the vacuum chamber 4 using the spring type corrugated pipe 5, the degree of vacuum can be effectively controlled every time the evaluation measurement is performed, and the position of the load cell 6 is As the stiffness response distance transmitted close to the superconducting bearing (7) can be minimized, the rigidity of the superconducting bearing (7) can be minimized, and it is reproducible without being influenced by environmental changes due to temperature and humidity and atmospheric resistance. Measurements can be made to obtain accurate measurement data.

도 1은 본 발명에 따른 초전도 베어링의 강성측정장치의 설치상태 측면도,1 is a side view of the installation state of the stiffness measuring device of the superconducting bearing according to the present invention,

도 2는 도 1의 요부 단면도,2 is a sectional view of the main part of FIG. 1;

-도면의 주요부분에 대한 부호의 설명-Explanation of symbols on the main parts of the drawing

1 : 작동기(Actuator), 2 : 양면 볼트,1: Actuator, 2: Double-sided bolt,

3 : 원통형 축, 4 : 진공챔버,3: cylindrical shaft, 4: vacuum chamber,

5 : 주름관 파이프, 6 : 로드셀(Load cell),5: corrugated pipe, 6: load cell,

7 : 초전도 베어링, 8 : 영구자석,7: superconducting bearing, 8: permanent magnet,

9 : 단열지그, 10 : 주름 튜브형 연결부재9: heat insulation jig, 10: corrugated tube type connecting member

Claims (3)

작동기(1)와 양면 볼트(2)를 매개로 연결되는 원통형 축(3)과, 이 원통형 축(3)에 끼워져서 진공챔버(4)의 상부판(4a)에 게재되는 스프링 형태의 주름관 파이프(5), 상기 진공챔버(4) 내부로 연장된 원통형 축(3)에 연결되는 로드셀(6), 상기 진공챔버(4) 내에 배치되는 측정체인 초전도 베어링(7) 위에 위치한 영구자석(8) 및, 상기 로드셀(6)과 영구자석(8) 사이를 연결하는 단열지그(9)를 갖추어 이루어진 초전도 베어링의 강성측정장치.A cylindrical shaft 3 connected via an actuator 1 and a double-sided bolt 2 and a spring-shaped corrugated pipe fitted to the cylindrical shaft 3 and placed on the upper plate 4a of the vacuum chamber 4. (5), a load cell (6) connected to the cylindrical shaft (3) extending into the vacuum chamber (4), a permanent magnet (8) located on the superconducting bearing (7), which is a measurement body disposed in the vacuum chamber (4) And an insulating jig (9) connecting the load cell (6) and the permanent magnet (8). 제 1항에 있어서,The method of claim 1, 상기 작동기(1)와 로드셀(6) 사이에 배치되는 주름 튜브형 연결부재(10)는 원통형 축(3)과 이 원통형 축(3)에 끼워진 스프링 형태의 주름관 파이프(5)로 이루어진 것을 특징으로 하는 초전도 베어링의 강성측정장치.The corrugated tube-shaped connecting member 10 disposed between the actuator 1 and the load cell 6 is characterized in that it consists of a cylindrical shaft 3 and a corrugated pipe 5 of spring shape fitted to the cylindrical shaft 3. Stiffness measuring device of superconducting bearing. 제 1항에 있어서,The method of claim 1, 상기 영구자석(8)은 주름 튜브형 연결부재(10)와 동일 축선 상으로 연결되어 이루어진 것을 특징으로 하는 초전도 베어링의 강성측정장치.The permanent magnet (8) is a stiffness measuring device of the superconducting bearing, characterized in that the connection made on the same axis as the corrugated tube-shaped connecting member (10).
KR1020080104795A 2008-10-24 2008-10-24 Stiffness measurement apparatus of super conductor bearing KR20100045719A (en)

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CN103245505A (en) * 2013-04-10 2013-08-14 浙江工业大学 Device for testing bending resistance of air floatation bearing
CN103674710A (en) * 2013-10-16 2014-03-26 洛阳轴研科技股份有限公司 Stiffness curve test method for axial displacement of micro bearing under continuously progressively increased axial force
CN104897493A (en) * 2014-11-26 2015-09-09 天津航天瑞莱科技有限公司苏州分公司 Low-temperature pressure cycle life testing method and system
CN107144720A (en) * 2017-05-11 2017-09-08 西南交通大学 High-temperature superconductor band critical current test device and its method of testing under cyclic loading
CN108120536A (en) * 2017-12-15 2018-06-05 兰州真空设备有限责任公司 A kind of oscillating bearing measurement of friction torque system and method for vacuum high/low temperature condition
CN110441056A (en) * 2019-09-09 2019-11-12 合肥工业大学 A kind of non-contact type mechanical can transmit testing stand and its test method
CN110567718A (en) * 2019-08-29 2019-12-13 西安理工大学 Rolling bearing radial dynamic stiffness testing device based on piezoelectric actuator

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103245505A (en) * 2013-04-10 2013-08-14 浙江工业大学 Device for testing bending resistance of air floatation bearing
CN103245505B (en) * 2013-04-10 2015-04-29 浙江工业大学 Device for testing bending resistance of air floatation bearing
CN103674710A (en) * 2013-10-16 2014-03-26 洛阳轴研科技股份有限公司 Stiffness curve test method for axial displacement of micro bearing under continuously progressively increased axial force
CN103674710B (en) * 2013-10-16 2015-10-21 洛阳轴研科技股份有限公司 Increase progressively the stiffness curve method of testing of miniature bearing axial displacement under axial force continuously
CN104897493A (en) * 2014-11-26 2015-09-09 天津航天瑞莱科技有限公司苏州分公司 Low-temperature pressure cycle life testing method and system
CN107144720A (en) * 2017-05-11 2017-09-08 西南交通大学 High-temperature superconductor band critical current test device and its method of testing under cyclic loading
CN108120536A (en) * 2017-12-15 2018-06-05 兰州真空设备有限责任公司 A kind of oscillating bearing measurement of friction torque system and method for vacuum high/low temperature condition
CN110567718A (en) * 2019-08-29 2019-12-13 西安理工大学 Rolling bearing radial dynamic stiffness testing device based on piezoelectric actuator
CN110567718B (en) * 2019-08-29 2020-12-18 西安理工大学 Rolling bearing radial dynamic stiffness testing device based on piezoelectric actuator
CN110441056A (en) * 2019-09-09 2019-11-12 合肥工业大学 A kind of non-contact type mechanical can transmit testing stand and its test method
CN110441056B (en) * 2019-09-09 2021-02-05 合肥工业大学 Non-contact mechanical energy transfer test bed and test method thereof

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