WO2008054248A2 - Magnetic bearing - Google Patents

Magnetic bearing Download PDF

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Publication number
WO2008054248A2
WO2008054248A2 PCT/RU2007/000548 RU2007000548W WO2008054248A2 WO 2008054248 A2 WO2008054248 A2 WO 2008054248A2 RU 2007000548 W RU2007000548 W RU 2007000548W WO 2008054248 A2 WO2008054248 A2 WO 2008054248A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
stator
air gap
permanent magnet
shaft
Prior art date
Application number
PCT/RU2007/000548
Other languages
French (fr)
Russian (ru)
Other versions
WO2008054248A3 (en
Inventor
Valery Dmitrievich Dudyshev
Original Assignee
Sherbakov, Mikhail Yuryevich
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 Sherbakov, Mikhail Yuryevich filed Critical Sherbakov, Mikhail Yuryevich
Publication of WO2008054248A2 publication Critical patent/WO2008054248A2/en
Publication of WO2008054248A3 publication Critical patent/WO2008054248A3/en

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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
    • F16C39/00—Relieving load on bearings
    • F16C39/06—Relieving load on bearings using magnetic means
    • F16C39/063—Permanent magnets
    • 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

Definitions

  • the utility model relates to magnetic bearings.
  • the closest device of the same purpose to the claimed utility model in terms of features is an electric machine with a magnetic rotor suspension containing a housing, a shaft, a stator and a rotor located with a working air gap relative to each other.
  • Auth. Certificate. USSR JN 1372494, MKI H02K 7/09, B. M5D988 adopted as a prototype.
  • the prototype uses an electric power source, complex windings and magnetic cores to perform the function of magnetic suspension.
  • the essence of the utility model is to use the magnetic forces of repulsion of the same poles of permanent magnets to create non-contact bearings that exclude the use of electric power sources.
  • the technical result is to simplify the design of the bearing, increasing reliability, durability, reducing the coefficient of friction, eliminating the source of electricity.
  • stator is made in the form of a permanent magnet, in the shape of a hollow cylinder with axial magnetization
  • the rotor is made in the form of a permanent magnet of cylindrical shape with the same axial magnetization as the stator
  • SUBSTITUTE SHEET (RULE 26) installed inside the stator by the same poles, to the left of the rotor with a working air gap, a support left ring disc permanent magnet is mounted coaxially with the shaft, and a right right ring permanent magnet is installed to the right of the rotor with a working air gap, the ends of the left and right ring magnets are located to the stator and the rotor of the same polarity, while the rotor is rigidly connected to the shaft.
  • FIG. 1 shows a magnetic bearing
  • the bearing with magnetic suspension of the rotor includes a housing 1, a stator 2, made in the form of a permanent magnet, in the form of a hollow cylinder with axial magnetization, and the rotor 3 is made in the form of a permanent magnet of cylindrical shape with the same axial magnetization and is installed with an air gap 7 inside the stator 2 the poles of the same name as the stator 2, to the left of the rotor 3 with a working air gap of 7 installed support left ring disk permanent magnet 4, and to the right of the rotor 3 with a working air gap mounted support right ring
  • the claim permanent magnet 5, the ends of the left and right ring magnets 4, 5 are arranged to the stator 2 and the rotor 3 of same polarity with a gap 8, the rotor 3 is fixedly connected to the shaft 6.
  • the device operates as follows.
  • SUBSTITUTE SHEET (RULE 26) dynamic load on the shaft 6 will decrease the working gap 8 between the magnets of the stator 2, rotor 3 and the end ring magnets 4, 5.
  • the magnetic repulsion force of their surfaces of the same magnetic polarity increases nonlinearly and almost instantly.
  • the axial dynamic load on the shaft 6 of the magnetic bearing is automatically compensated.
  • the bearing with the magnetic suspension of the rotor 3 provides effective compensation of radial dynamic and static loads on the shaft 6 due to the nonlinear increase in the magnetic repulsive forces of the same poles of the magnets of the stator 2 and rotor 3.
  • the bearing also provides effective compensation of the axial loads and movements of the shaft 6 due to the nonlinear increase forces of magnetic repulsion of the same poles of the magnets of the stator 2 and rotor 3 from the end magnets 4, 5.
  • Magnetic materials, their sizes and working clearances pnika selected by the condition of exceeding the magnetic repulsion forces maximum permissible dynamic loads on the bearing shaft.

Landscapes

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

Abstract

The invention relates to magnetic bearings. The inventive magnetic bearing comprises a body, shaft, stator and a rotor, which are positioned at an operating air gap with respect to each other. The stator is embodied in the form of a hollow cylindric permanent magnet with axially oriented magnetization. The rotor is embodied in the form of a cylindrical magnet, the axially oriented magnetization thereof is similar to the magnetisation of the stator. A left annular disc-like permanent magnet is arranged on the left of the rotor at an air gap. A right annular disc-like permanent magnet is arranged on the right of the rotor at an air gap. The end faces of the left and right annular magnets are oriented to the stator and to the rotor with the like poles thereof. The rotor is rigidly fastened to the shaft. The body is made of a non-magnetic material. Said invention makes it possible to simplify the structural design for a bearing and to increase the reliability and service life thereof.

Description

Магнитный подшипник Magnetic bearing
Полезная модель относится к магнитным подшипникам.The utility model relates to magnetic bearings.
Наиболее близким устройством того же назначения к заявленной полезной модели по совокупности признаков является электрическая машина с магнитным подвесом ротора, содержащая корпус, вал, статор и ротор, расположенные с рабочим воздушным зазором друг относительно друга. (Авт. свид. СССР JNЬ 1372494, МКИ H02K 7/09, Б. M5Д988 г.), принятое за прототип.The closest device of the same purpose to the claimed utility model in terms of features is an electric machine with a magnetic rotor suspension containing a housing, a shaft, a stator and a rotor located with a working air gap relative to each other. (Auth. Certificate. USSR JN 1372494, MKI H02K 7/09, B. M5D988), adopted as a prototype.
К причинам, препятствующим достижению указанного ниже технического результата при использовании известного устройства, принятого за прототип, относится то, что в прототипе для выполнения функции магнитного подвеса использованы источник электроэнергии, сложные обмотки и магнитопроводы.For reasons that impede the achievement of the technical result indicated below when using the known device adopted for the prototype, the prototype uses an electric power source, complex windings and magnetic cores to perform the function of magnetic suspension.
Сущность полезной модели заключается в использовании магнитных сил отталкивания одноименных полюсов постоянных магнитов для создания бесконтактных подшипников, исключающих применение источников электроэнергии.The essence of the utility model is to use the magnetic forces of repulsion of the same poles of permanent magnets to create non-contact bearings that exclude the use of electric power sources.
Технический результат - упрощение конструкции подшипника, повышение надежности, долговечности, уменьшение коэффициента трения, устранение источника электроэнергии.The technical result is to simplify the design of the bearing, increasing reliability, durability, reducing the coefficient of friction, eliminating the source of electricity.
Указанный технический результат при осуществлении полезной модели достигается тем, что в известном устройстве, содержащем корпус, вал, статор и ротор, расположенные с рабочим воздушным зазором друг относительно друга, особенность заключается в том, что статор выполнен в виде постоянного магнита, по форме полого цилиндра с осевой намагниченностью, а ротор выполнен в виде постоянного магнита цилиндрической формы с той же осевой намагниченностью, что и статор, иThe specified technical result in the implementation of the utility model is achieved by the fact that in the known device comprising a housing, a shaft, a stator and a rotor located with a working air gap relative to each other, the feature is that the stator is made in the form of a permanent magnet, in the shape of a hollow cylinder with axial magnetization, and the rotor is made in the form of a permanent magnet of cylindrical shape with the same axial magnetization as the stator, and
ЗАМЕНЯЮЩИЙ ЛИСТ (ПРАВИЛО 26) установлен вовнутрь статора одноименным полюсами, слева от ротора с рабочим воздушным зазором установлены соосно с валом опорный левый кольцевой дисковый постоянный магнит, а справа от ротора с рабочим воздушным зазором установлен опорный правый кольцевой дисковый постоянный магнит, торцы левого и правого кольцевых магнитов расположены к статору и ротору одноименной полярностью, при этом ротор жестко соединен с валом.SUBSTITUTE SHEET (RULE 26) installed inside the stator by the same poles, to the left of the rotor with a working air gap, a support left ring disc permanent magnet is mounted coaxially with the shaft, and a right right ring permanent magnet is installed to the right of the rotor with a working air gap, the ends of the left and right ring magnets are located to the stator and the rotor of the same polarity, while the rotor is rigidly connected to the shaft.
На фиг. 1 изображен магнитный подшипникIn FIG. 1 shows a magnetic bearing
Сведения, подтверждающие возможность осуществления полезной модели с получением вышеуказанного технического результата, заключаются в следующем.Information confirming the feasibility of implementing the utility model with obtaining the above technical result is as follows.
Подшипник с магнитным подвесом ротора включает корпус 1, статор 2, выполненный в виде постоянного магнита, по форме полого цилиндра с осевой намагниченностью, а ротор 3 выполнен в виде постоянного магнита цилиндрической формы с той же осевой намагниченностью и установлен с воздушным зазором 7 вовнутрь статора 2 одноименным полюсами, что и статор 2, слева от ротора 3 с рабочим воздушным зазором 7 установлен опорный левый кольцевой дисковый постоянный магнит 4, а справа от ротора 3 с рабочим воздушным зазором установлен опорный правый кольцевой дисковый постоянный магнит 5, торцы левого и правого кольцевых магнитов 4, 5 расположены к статору 2 и ротору 3 одноименной полярностью, с зазором 8, при этом ротор 3 жестко соединен с валом 6.The bearing with magnetic suspension of the rotor includes a housing 1, a stator 2, made in the form of a permanent magnet, in the form of a hollow cylinder with axial magnetization, and the rotor 3 is made in the form of a permanent magnet of cylindrical shape with the same axial magnetization and is installed with an air gap 7 inside the stator 2 the poles of the same name as the stator 2, to the left of the rotor 3 with a working air gap of 7 installed support left ring disk permanent magnet 4, and to the right of the rotor 3 with a working air gap mounted support right ring The claim permanent magnet 5, the ends of the left and right ring magnets 4, 5 are arranged to the stator 2 and the rotor 3 of same polarity with a gap 8, the rotor 3 is fixedly connected to the shaft 6.
Устройство работает следующим образом.The device operates as follows.
При возникновении радиальной нагрузки на вал 6 подшипника с магнитным подвесом ротора 3, уменьшатся радиальный рабочий зазор 7 между магнитами статора 2 и ротора 3, установленных внутри корпуса 1,When a radial load occurs on the shaft 6 of the bearing with the magnetic suspension of the rotor 3, the radial working clearance 7 between the magnets of the stator 2 and the rotor 3 installed inside the housing 1 will decrease
Вследствие этого нелинейно и практически мгновенно возрастает сила магнитного отталкивания их поверхностей одноименной магнитной полярности. В результате автоматически компенсируется радиальная статическая и динамическая нагрузка. При возникновении осевойAs a result of this, the magnetic repulsion force of their surfaces of the same magnetic polarity increases nonlinearly and almost instantly. As a result, the radial static and dynamic load are automatically compensated. When axial
ЗАМЕНЯЮЩИЙ ЛИСТ (ПРАВИЛО 26) динамической нагрузки на вал 6 уменьшатся рабочий зазор 8 между магнитами статора 2, ротора 3 и торцевыми кольцевыми магнитами 4, 5. Вследствие этого нелинейно и практически мгновенно возрастает сила магнитного отталкивания их поверхностей одноименной магнитной полярности. В результате автоматически компенсируется осевая динамическая нагрузка на вал 6 магнитного подшипника.SUBSTITUTE SHEET (RULE 26) dynamic load on the shaft 6 will decrease the working gap 8 between the magnets of the stator 2, rotor 3 and the end ring magnets 4, 5. As a result, the magnetic repulsion force of their surfaces of the same magnetic polarity increases nonlinearly and almost instantly. As a result, the axial dynamic load on the shaft 6 of the magnetic bearing is automatically compensated.
Таким образом, подшипник с магнитным подвесом ротора 3 обеспечивает эффективную компенсацию радиальных динамических и статических нагрузок на валу 6 благодаря нелинейному повышению сил магнитного отталкивания одноименных полюсов магнитов статора 2 и ротора 3. Подшипник также обеспечивает эффективную компенсацию и осевых нагрузок и перемещений вала 6 благодаря нелинейному повышению сил магнитного отталкивания одноименных полюсов магнитов статора 2 и ротора 3 от торцевых магнитов 4, 5. Магнитные материалы, их размеры и рабочие зазоры подшипника выбирают по условию превышения магнитных сил отталкивания предельно допустимых динамических нагрузок на вал подшипника.Thus, the bearing with the magnetic suspension of the rotor 3 provides effective compensation of radial dynamic and static loads on the shaft 6 due to the nonlinear increase in the magnetic repulsive forces of the same poles of the magnets of the stator 2 and rotor 3. The bearing also provides effective compensation of the axial loads and movements of the shaft 6 due to the nonlinear increase forces of magnetic repulsion of the same poles of the magnets of the stator 2 and rotor 3 from the end magnets 4, 5. Magnetic materials, their sizes and working clearances pnika selected by the condition of exceeding the magnetic repulsion forces maximum permissible dynamic loads on the bearing shaft.
ЗАМЕНЯЮЩИЙ ЛИСТ (ПРАВИЛО 26) SUBSTITUTE SHEET (RULE 26)

Claims

Формула полезной модели Utility Model Formula
Магнитный подшипник, содержащий корпус, вал, статор и ротор, расположенные с рабочим воздушным зазором друг относительно друга, отличающийся тем, что статор выполнен в виде постоянного магнита, по форме полого цилиндра с осевой намагниченностью, а ротор выполнен в виде постоянного магнита цилиндрической формы с той же осевой намагниченностью, что и статор, и установлен вовнутрь статора с воздушным зазором одноименным полюсами, слева от ротора с рабочим воздушным зазором установлены соосно с валом опорный левый кольцевой дисковый постоянный магнит, а справа от ротора с рабочим воздушным зазором установлен опорный правый кольцевой дисковый постоянный магнит, торцы левого и правого кольцевых магнитов расположены к статору и ротору одноименной полярностью, при этом ротор жестко соединен с валом.A magnetic bearing comprising a housing, a shaft, a stator and a rotor located with a working air gap relative to each other, characterized in that the stator is made in the form of a permanent magnet, in the form of a hollow cylinder with axial magnetization, and the rotor is made in the form of a permanent magnet of cylindrical shape with the same axial magnetization as the stator, and is installed inside the stator with an air gap of the same poles, to the left of the rotor with a working air gap, a support left ring disk constant is installed coaxially with the shaft magnet, and to the right of the rotor with a working air gap, a support right ring annular permanent magnet is installed, the ends of the left and right ring magnets are located to the stator and rotor of the same polarity, while the rotor is rigidly connected to the shaft.
ЗАМЕНЯЮЩИЙ ЛИСТ (ПРАВИЛО 26) SUBSTITUTE SHEET (RULE 26)
PCT/RU2007/000548 2006-10-13 2007-10-09 Magnetic bearing WO2008054248A2 (en)

Applications Claiming Priority (2)

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RU2006136275 2006-10-13
RU2006136275 2006-10-13

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WO2008054248A2 true WO2008054248A2 (en) 2008-05-08
WO2008054248A3 WO2008054248A3 (en) 2008-08-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024049310A1 (en) 2022-09-02 2024-03-07 Calle Madrid Alfredo Raul Peripheral magnetic levitation system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1209954A1 (en) * 1984-01-19 1986-02-07 Калининский Ордена Трудового Красного Знамени Политехнический Институт Magnetic thrust bearing
SU1288393A1 (en) * 1982-05-10 1987-02-07 Московский энергетический институт Magnetic bearing
SU1372494A1 (en) * 1986-06-27 1988-02-07 Всесоюзный научно-исследовательский институт электромеханики Electric machine with magnetic rotor suspension
US6784581B1 (en) * 2003-03-19 2004-08-31 Cheng-Kang Chen Magnetic floating bearing of a fan, which locates rotary shaft by means of distribution of magnetic force

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11325075A (en) * 1998-05-13 1999-11-26 Sankyo Seiki Mfg Co Ltd Magnetic bearing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1288393A1 (en) * 1982-05-10 1987-02-07 Московский энергетический институт Magnetic bearing
SU1209954A1 (en) * 1984-01-19 1986-02-07 Калининский Ордена Трудового Красного Знамени Политехнический Институт Magnetic thrust bearing
SU1372494A1 (en) * 1986-06-27 1988-02-07 Всесоюзный научно-исследовательский институт электромеханики Electric machine with magnetic rotor suspension
US6784581B1 (en) * 2003-03-19 2004-08-31 Cheng-Kang Chen Magnetic floating bearing of a fan, which locates rotary shaft by means of distribution of magnetic force

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024049310A1 (en) 2022-09-02 2024-03-07 Calle Madrid Alfredo Raul Peripheral magnetic levitation system

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