WO2023092804A1 - Moteur électrique capable de réaliser une protection de palier - Google Patents

Moteur électrique capable de réaliser une protection de palier Download PDF

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Publication number
WO2023092804A1
WO2023092804A1 PCT/CN2021/142450 CN2021142450W WO2023092804A1 WO 2023092804 A1 WO2023092804 A1 WO 2023092804A1 CN 2021142450 W CN2021142450 W CN 2021142450W WO 2023092804 A1 WO2023092804 A1 WO 2023092804A1
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WO
WIPO (PCT)
Prior art keywords
end cover
ring
support ring
rotor
drive end
Prior art date
Application number
PCT/CN2021/142450
Other languages
English (en)
Chinese (zh)
Inventor
倪伟
任延生
李祥成
李嘉宾
孙德强
魏超
吴楠
张江涛
Original Assignee
中车永济电机有限公司
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 中车永济电机有限公司 filed Critical 中车永济电机有限公司
Publication of WO2023092804A1 publication Critical patent/WO2023092804A1/fr

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Classifications

    • 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
    • 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
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Definitions

  • the application relates to the field of motor design, in particular to a motor capable of realizing bearing protection.
  • the motor will vibrate in various directions due to road conditions. Without protective devices, there will be relative motion between the motor stator and rotor, including axial movement, radial movement and circumferential rotation.
  • the motor rotor is supported by the motor bearings, and the relative movement between the stator and the rotor can easily cause damage to the motor bearings, causing problems such as abnormal noise of the bearings, excessive temperature rise, and bearing failure during the operation of the motor. Therefore, it is necessary to install a protective device on the motor to limit the relative movement of the stator and rotor during the transportation of the motor, so as to avoid bearing damage caused by vibration.
  • the motor when the motor is in a static state for a long time, since the motor bearing is always under stress, it will also cause indentation of the motor bearing and cause damage to the bearing. Now, for long-term static motors, the rotor of the motor is generally rotated regularly to prevent the indentation of the bearings. If the force on the bearings can be reduced when the motor is in a static state, regular maintenance of the motor can be avoided and maintenance costs can be reduced.
  • motor protection devices There are two main types of existing motor protection devices: one is fixed by rigidity, which is used to make fixed-connection tooling for the motor stator and rotor. Generally, holes are drilled on the motor shaft head and the end face of the stator, and the end face of the rotating shaft is pressed with section steel.
  • the rotating shaft, section steel and stator are respectively connected; or one end is pressed against the end face of the rotating shaft with bolts, and the other end is positioned radially and circumferentially by hoops, pins, V-shaped clamps, etc., and then the hoops, pins, V-shaped clamps
  • the motor is rigidly connected with the stator through the fixed frame, that is, the stator and rotor of the motor are fixedly connected before the motor is transported, so as to limit the movement of the rotor relative to the stator and protect the bearing.
  • the disadvantages are: various types of motors
  • the tooling needs to be customized separately; the transportation volume of the motor is increased; most of the rigid protection cannot provide comprehensive protection for axial movement, radial movement and circumferential rotation at the same time; there are many parts to be processed, the cost is high, and they are easy to lose. It is troublesome to install and disassemble, and the man-hour is more.
  • the other type is flexible cushioning.
  • springs and card slots are arranged at the bottom of the transport box and around the box body. One end of the spring is connected to the motor, and the other end is fixed to the box body. During transportation, the motor is suspended in the motor box by the spring.
  • the relative movement of the motor stator and rotor caused by vibration is buffered by the spring to protect the motor bearing; or the motor stator is fixed in the transport box, and the motor rotor is fixed on the transport box with a flexible spring, and the rotor is released relative to the motor stator by the spring.
  • the vibration has a protective effect; but the disadvantages are: it can only play a certain buffering effect, and cannot completely limit the relative movement between the stator and rotor of the motor; in the case of bad road conditions, the protective effect is weak; different The specifications of the springs used by different motors are also different, there is no certain protection standard, and the cushioning effect is not uniform; the spring needs to be processed on the motor body to fix the spring, there are many parts, the installation and disassembly are time-consuming, and the tooling needs to be customized; the transportation volume is large and increases Motor cost. Therefore, although the above two methods can play the role of bearing protection, the disadvantages are also obvious.
  • the common disadvantages are: 1The protective tooling of different motors in the two methods generally cannot be used universally, and the parts need to be customized, and the structure is complicated. Many, easy to lose, troublesome to install and disassemble, high cost, and the effect of flexible protection is not good enough; 2In addition, the above two types of protection methods can only be used when the motor is transported separately. The protective tooling cannot be installed when the bogie or the whole vehicle is transported, which is inconvenient to use; 3The bearing is under stress when the motor is in a static state for a long time, and it needs to be rotated regularly for maintenance. The above two types of protection methods cannot be used for static The motor bearings are protected.
  • the embodiments of the present application provide a motor capable of bearing protection in order to solve various deficiencies in existing protection schemes for bearings in electric motors.
  • a motor capable of bearing protection including a stator and a rotor
  • the drive end of the stator is installed with a drive end cover
  • the non-drive end of the stator is installed with a non-drive end cover.
  • the drive end cover, the inside of the drive end cover and the non-drive end cover are each equipped with a support ring, and the inside of the drive end cover and the non-drive end cover are provided with a stop for installing the support ring
  • the support ring is also designed with notches corresponding to the two end caps, and the support ring is provided with screw holes and blind holes evenly distributed in the radial direction, the screw holes and blind holes are arranged at intervals, and the transmission end
  • a through hole is provided at the position corresponding to the screw hole on the support ring, and a screw hole is provided at the position corresponding to the blind hole on the support ring;
  • the drive end and the non-drive end of the rotor are respectively provided with
  • a motor capable of bearing protection designed in the embodiment of the present application uses different connection modes between the support ring, the motor end cover and the rotor, so that the motor can protect the bearing when the motor is working and when the bearing is protected.
  • the motor generally includes a stator and a rotor.
  • the drive end of the stator is equipped with a drive end cover, and the non-drive end is equipped with a non-drive end cover.
  • the shape is a conventional end cover, but it matches the motor.
  • a support ring installed on the inner side of the end cover of the transmission end, the inner side of the end cover of the transmission end and the end cover of the non-drive end are provided with a stop for installing the support ring, and the support ring is also designed with a stop corresponding to the two end covers , so the two upper support rings are installed at the corresponding seam positions of the end caps on both sides.
  • screw holes and blind holes are evenly distributed radially on the support ring, the screw holes and blind holes are arranged at intervals, and the end cover of the driving end and the end cover of the non-driving end correspond to the screw holes on the support ring
  • the drive end and the non-drive end of the rotor are respectively provided with an inner seal ring.
  • the inner seal ring is an inherent part and surrounds the rotating shaft in the rotor. Snap connection, the position of the inner seal ring at the non-drive end close to the shaft is snap-fitted with the corresponding position of the end cover of the non-drive end. Although its structure is fixed, the shape of its outer periphery can be changed.
  • the inner seal ring The width of the outer circumference matches the position of the support ring, and the inner seal ring is also located on the inner side of the support ring.
  • the slope of the support ring is parallel to the slope of the support ring, and there is a certain gap between the slope of the support ring and the slope of the inner sealing ring. Axial distance of the fitting part of the end cap spigot.
  • the specific operation of the embodiment of the present application is as follows: during the normal operation of the motor, the support rings on both sides are installed on the non-drive end cover and the drive end cover respectively, and bolts are used to connect the support ring screw holes through the end cover through holes to make the support The ring is tightly attached to the end covers on both sides, and there is a gap between the two slopes of the support ring and the inner sealing ring, which will not rub against each other and will not affect the normal operation of the motor; when the motor needs bearing protection, loosen the end covers on both sides Screw the bolts into the screw holes of the end cover, push the bolts into the blind hole of the support ring, tighten the bolts symmetrically on both sides, and press the support ring on the slope of the inner sealing ring; then
  • the rotor part of the motor is rigidly connected to the stator of the motor, and the force on the bearing part of the motor is small.
  • the vibration received during the transportation process under various working conditions will not cause the relative movement of the motor rotor and stator, which will protect the motor bearings.
  • the motor rotor When the motor is in a static state for a long time, due to the small force on the motor bearing, the motor rotor will not cause indentation on the bearing, and there is no need for regular maintenance of the motor rotor. Therefore, this type of motor design can also be used for motors in a static state. Play the role of bearing protection.
  • any structure that meets the above conditions can be realized, and there is no restriction that the structures at both ends must be the same.
  • the inherent components of the rotor part include a fan, a rotor pressure ring, a rotor end ring, and a rotor core
  • the inner sealing ring is replaced by any part of the fan, rotor pressure ring, rotor end ring, and rotor core
  • the slope corresponding to the slope on the support ring is also set at the corresponding position of any part of the fan, the rotor pressure ring, the rotor end ring, and the rotor core, so that the position and installation method of the slope on the rotor component and the support ring can be changed.
  • the scheme of using the supporting member to crimp the components of the rotor part of the motor all falls within the scope of protection of this case.
  • the embodiment of the present application has the following beneficial effects:
  • the embodiment of the present application provides a motor that can realize bearing protection.
  • This structure has a strong protective effect on the motor, a comprehensive protective effect, a small footprint, and easy installation.
  • the utility model has the advantages of simple and convenient use, low cost, and can meet the bearing protection needs of motors under various working conditions.
  • FIG. 1 is a schematic structural diagram of an embodiment of the present application.
  • a motor that can realize bearing protection includes a stator 5 and a rotor 6, the drive end of the stator 5 is equipped with a drive end cover 1, and the non-drive end of the stator 5 is equipped with a non-drive end End cover 7, a support ring 3 is installed on the inner side of the transmission end cover 1 and the non-transmission end cover 7, and a support ring 3 is installed on the inner side of the transmission end cover 1 and the non-transmission end cover 7 3, the support ring 3 is also designed with the corresponding to the two end caps, that is to say, the support ring 3 is also designed with corresponding to the drive end cover 1 and the non-drive end cover 7 There are screw holes and blind holes evenly distributed in the radial direction on the support ring 3, the screw holes and blind holes are arranged at intervals, and the transmission end cover 1 and the non-drive end cover 7 are connected with the support The position corresponding to the screw hole on the ring 3 is provided with a through hole, and the position corresponding to the blind hole on
  • the outer circumference width of said inner seal ring 4 matches the position of the support ring 3, and the inner seal ring 4 is located inside the support ring 3
  • the end of the support ring 3 close to the inner seal ring 4 is set as a bevel shape, and the position facing the support ring 3 on the inner seal ring 4 is also provided with a bevel for support, and the bevel is aligned with the support ring 3
  • the slopes are parallel to each other, there is a certain gap between the slopes of the support ring 3 and the slope of the inner sealing ring 4, and the axial distance between the two slopes is less than the distance between the support ring 3 and the end cover 1 of the transmission end or the end cover 7 of the non-drive end.
  • the axial distance that is, the axial distance between the slope of the support ring 3 and the slope of the inner sealing ring 4 is less than the fit between the support ring 3 and the stop of the drive end cover 1 or the stop of the non-drive end cover 7 part axial distance.
  • the support ring 3 has two connection states with the transmission end cover 1 or the non-transmission end cover 7.
  • the transmission end cover 1 or the non-transmission end cover 7 The end cover 7 is connected with the screw hole of the support ring 3 through the through hole of the end cover by the bolt 2, and the support ring 3 is tightened on the transmission end cover 1;
  • the transmission end cover 1 or The bolt 2 of the end cover 7 of the non-drive end passes through the screw hole of the end cover and pushes into the blind hole of the support ring 3, so that the support ring 3 is pressed against the inclined surface of the inner sealing ring 4;
  • the drive end and the bolt 2 at the drive end are tightened so that the motor stator and rotor are connected together through the bolt 2, the support ring 3 and the inner seal ring 4.
  • the bolts 2 are standard bolts; the inner sealing ring 4 is hollow in the shape of a truncated cone.
  • This embodiment can also have the following alternatives: the inherent components of the rotor part include a fan, a rotor hold-off ring, a rotor end ring, and a rotor core, and the inner sealing ring 4 is replaced by a fan, a rotor hold-off ring, a rotor end ring,
  • the slope corresponding to the slope on the support ring 3 is also set at the corresponding position of any component in the fan, the rotor pressure ring, the rotor end ring, and the rotor core.
  • the motor rotor 6 part When the motor rotor 6 part is rigidly connected with the motor stator 5, the force on the motor bearing part is very small, and the vibration received by the motor during the transportation process under various working conditions will not cause the relative movement of the motor rotor 6 and the stator 5, which will affect the motor bearing. to the protective effect.
  • the motor When the motor is in a static state for a long time, the motor rotor 6 will not cause indentation on the bearing due to the small force on the motor bearing, and there is no need to perform regular disk maintenance on the motor rotor 6. It can also play the role of bearing protection.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne un moteur électrique capable de réaliser une protection de palier, qui se rapporte au domaine de la conception d'un moteur électrique. Le moteur électrique est structuré de telle sorte qu'une extrémité de transmission d'un stator (5) est pourvu d'un couvercle d'extrémité de transmission (1), et une extrémité de non-transmission est pourvue d'un couvercle d'extrémité sans transmission (7), les côtés intérieurs du couvercle d'extrémité de transmission (1) et le couvercle d'extrémité de non-transmission (7) étant chacun pourvus d'une bague de support (3), la bague de support (3) étant disposée radialement et uniformément avec des trous de vis et des trous borgnes, les trous de vis et les trous borgnes étant agencés à des intervalles, des trous traversants étant prévus à des positions dans les couvercles d'extrémité (1, 7) sur deux côtés correspondant aux trous de vis sur la bague de support (3), et des trous de vis étant disposés à des positions dans la bague de support (3) correspondant aux trous borgnes ; et des bagues d'étanchéité internes (4) étant agencées au niveau d'une extrémité de transmission et d'une extrémité de non-transmission d'un rotor, respectivement, et entourant un arbre rotatif dans le rotor (6), la bague d'étanchéité intérieure (4) sur l'extrémité de transmission étant serrée sur le couvercle d'extrémité de transmission (1), la bague d'étanchéité interne (4) sur l'extrémité de non-transmission étant serrée sur le couvercle d'extrémité de non-transmission (7), la partie d'extrémité de la bague de support (3) à proximité de la bague d'étanchéité interne (4) étant en forme de biseau, un chanfrein pour le support étant également disposé à la position opposée à la bague de support (3) sur la bague d'étanchéité interne (4), et le biseau étant parallèle au biseau sur la bague de support (3). La solution technique est simple et pratique, de petite taille dans l'espace occupé, et de faible coût, et peut réaliser le but de protéger un palier de moteur électrique dans diverses conditions de travail.
PCT/CN2021/142450 2021-11-25 2021-12-29 Moteur électrique capable de réaliser une protection de palier WO2023092804A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111409472.9 2021-11-25
CN202111409472.9A CN114337045A (zh) 2021-11-25 2021-11-25 一种可实现轴承防护的电机

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WO2023092804A1 true WO2023092804A1 (fr) 2023-06-01

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WO (1) WO2023092804A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112722544A (zh) * 2020-12-25 2021-04-30 中车永济电机有限公司 一种用于配装齿轮箱的机车牵引电机的运输装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2538527A1 (fr) * 2010-02-19 2012-12-26 Kabushiki Kaisha Toshiba Moteur électrique
CN205453426U (zh) * 2016-03-23 2016-08-10 中车永济电机有限公司 电机运输用轴承防护装置
CN111520411A (zh) * 2020-04-28 2020-08-11 西安中车永电捷力风能有限公司 一种用于电机运输的轴承防护工装
CN111669020A (zh) * 2020-06-22 2020-09-15 中车株洲电机有限公司 一种防过定位电机轴承免解体拆装方法
CN111669019A (zh) * 2020-06-22 2020-09-15 中车株洲电机有限公司 一种防过定位电机轴承免解体拆装方法
CN111687786A (zh) * 2020-06-22 2020-09-22 中车株洲电机有限公司 一种防过定位电机轴承免解体拆装方法
CN111817483A (zh) * 2020-07-27 2020-10-23 中车株洲电力机车研究所有限公司 一种电机以及所述电机的轴承维护方法
CN112713726A (zh) * 2020-12-25 2021-04-27 中车永济电机有限公司 一种带轴伸的牵引电机轴承运输防护工装
WO2021136834A1 (fr) * 2019-12-31 2021-07-08 Bombardier Transportation Gmbh Machine électrique pourvue d'un ensemble de palier amovible
CN113691070A (zh) * 2021-08-25 2021-11-23 中车株洲电机有限公司 一种电机结构及其轴承更换方法

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2538527A1 (fr) * 2010-02-19 2012-12-26 Kabushiki Kaisha Toshiba Moteur électrique
CN205453426U (zh) * 2016-03-23 2016-08-10 中车永济电机有限公司 电机运输用轴承防护装置
WO2021136834A1 (fr) * 2019-12-31 2021-07-08 Bombardier Transportation Gmbh Machine électrique pourvue d'un ensemble de palier amovible
CN111520411A (zh) * 2020-04-28 2020-08-11 西安中车永电捷力风能有限公司 一种用于电机运输的轴承防护工装
CN111669020A (zh) * 2020-06-22 2020-09-15 中车株洲电机有限公司 一种防过定位电机轴承免解体拆装方法
CN111669019A (zh) * 2020-06-22 2020-09-15 中车株洲电机有限公司 一种防过定位电机轴承免解体拆装方法
CN111687786A (zh) * 2020-06-22 2020-09-22 中车株洲电机有限公司 一种防过定位电机轴承免解体拆装方法
CN111817483A (zh) * 2020-07-27 2020-10-23 中车株洲电力机车研究所有限公司 一种电机以及所述电机的轴承维护方法
CN112713726A (zh) * 2020-12-25 2021-04-27 中车永济电机有限公司 一种带轴伸的牵引电机轴承运输防护工装
CN113691070A (zh) * 2021-08-25 2021-11-23 中车株洲电机有限公司 一种电机结构及其轴承更换方法

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