CN112290708B - Magnetic suspension high-speed motor rotor structure - Google Patents
Magnetic suspension high-speed motor rotor structure Download PDFInfo
- Publication number
- CN112290708B CN112290708B CN202011547041.4A CN202011547041A CN112290708B CN 112290708 B CN112290708 B CN 112290708B CN 202011547041 A CN202011547041 A CN 202011547041A CN 112290708 B CN112290708 B CN 112290708B
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- shaft body
- sleeve cup
- rotor
- rotor shaft
- baffle ring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- 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
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to the field of motors, in particular to a magnetic suspension high-speed motor rotor structure which comprises a rotor shaft body and a plurality of radial bearings; the radial bearings are respectively sleeved on the rotor shaft body, a first gap is formed between the inner ring surface of each radial bearing and the outer ring surface of the rotor shaft body, a sleeve cup assembly is arranged in each first gap and is connected with the rotor shaft body in a matched mode, and a second gap is formed between each sleeve cup assembly and the inner ring surface of each radial bearing. The conditions that when the rotor is unstable or falls off, the motor rotor rotating at a high speed is contacted with the radial bearing and high temperature is generated due to friction caused by the difference of the rotating speed, and finally the motor rotor collides with the inner ring of the radial bearing and is welded at a high temperature can be avoided.
Description
Technical Field
The invention relates to the field of motors, in particular to a magnetic suspension high-speed motor rotor structure.
Background
When the magnetic bearing of the magnetic suspension high-speed motor is not started, the motor rotor falls on the radial bearings at the front end and the rear end, when the motor is started, a rotor of the motor is suspended in the center of the magnetic bearing and rotates at a high speed, when the motor in operation has an outgoing line fault, the rotor can be unstable or fall off, the motor rotor can fall on the radial bearings at the front end and the rear end, the motor rotor rotating at the high speed can be in contact with the radial bearings at the front end and the rear end, high speed difference exists, high temperature can be generated in a friction state, the risk of collision and high-temperature welding of the motor rotor and the inner ring of the radial bearing is caused, the motor rotor is collided, rolled and deformed or welded with the inner ring of the radial bearing, the motor fails, the motor cannot be maintained on site at the moment, the motor rotor can only return to a factory, the use of a client is delayed, the hidden danger of scrapping of the motor rotor can be caused.
Disclosure of Invention
The invention aims to provide a magnetic suspension high-speed motor rotor structure which can avoid the conditions that when a rotor is unstable or falls off, the motor rotor rotating at a high speed is contacted with a radial bearing and friction generates high temperature due to the difference of rotating speed, and finally the motor rotor collides with an inner ring of the radial bearing and is welded at the high temperature.
On one hand, the magnetic suspension high-speed motor rotor structure provided by the invention comprises a rotor shaft body and a plurality of radial bearings;
the radial bearings are respectively sleeved on the rotor shaft body, a first gap is formed between the inner ring surface of each radial bearing and the outer ring surface of the rotor shaft body, a sleeve cup assembly is arranged in each first gap and is connected with the rotor shaft body in a matched mode, and a second gap is formed between each sleeve cup assembly and the inner ring surface of each radial bearing.
Furthermore, one end of the rotor shaft body is a front end of the shaft body, the other end of the rotor shaft body is a rear end of the shaft body, the plurality of radial bearings comprise first bearings and second bearings, the first bearings are sleeved at the front end of the shaft body, and the second bearings are sleeved at the rear end of the shaft body;
the sleeve cup assembly comprises a first sleeve cup and a second sleeve cup, the first sleeve cup is connected with the front end of the shaft body in a matched mode, and the second sleeve cup is connected with the rear end of the shaft body in a matched mode.
Furthermore, the first sleeve cup is in interference fit with the front end of the shaft body, and one end of the first sleeve cup is abutted to a shaft joint on the rotor shaft body.
Furthermore, the second sleeve cup is in interference fit or transition fit with the rear end of the shaft body, and one end of the second sleeve cup is abutted to the shaft joint on the rotor shaft body.
Furthermore, a first baffle ring is arranged at the abutting position of the second sleeve cup, one side end face of the first baffle ring abuts against a shaft joint on the rotor shaft body, and a third gap exists between the other side end face of the first baffle ring and the side end face of the second bearing.
Furthermore, a thrust plate is arranged at the rear end of the shaft body, a second retaining ring is arranged between the second sleeve cup and the thrust plate, the second retaining ring is sleeved on the rear end of the shaft body, the second retaining ring is in clearance fit with the rear end of the shaft body, one side end face of the second retaining ring is abutted to the second sleeve cup, and the other side end face of the second retaining ring is abutted to the thrust plate.
Furthermore, the outer ring surfaces of the first sleeve cup and the second sleeve cup are provided with a plating layer.
Furthermore, a plating layer is arranged on the end face of one side, close to the second bearing, of the first baffle ring.
Furthermore, the end faces of the two sides of the second baffle ring are respectively provided with a plating layer.
Further, the coating is made of molybdenum disulfide.
Has the advantages that:
the invention provides a magnetic suspension high-speed motor rotor structure.A sleeve cup assembly is sleeved outside a rotor shaft body and plays a role in protecting the rotor shaft body, the sleeve cup assembly is positioned between the outer ring surface of the rotor shaft body and the inner ring surface of a radial bearing, when the rotor shaft body is unstable or falls, the outer ring surface of the sleeve cup assembly is contacted with the inner ring surface of the radial bearing, and the sleeve cup assembly is connected with the rotor shaft body in a matching way, so that when the outer ring surface of the sleeve cup assembly and the inner ring surface of the radial bearing are fixedly connected together due to high-temperature welding, the sleeve cup assembly can be replaced independently, only the radial bearing and the sleeve cup assembly are scrapped at the moment, corresponding parts are replaced, and the rotor assembly does not need to be scrapped.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a rotor structure of a magnetic levitation high-speed motor according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a front end of a shaft according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a rear end of a shaft body according to an embodiment of the present invention.
Icon: 1-a rotor shaft body; 2-front end of shaft body; 3-rear end of shaft body; 4-a first set of cups; 5-a first bearing; 6-a second bearing; 7-a thrust disk; 8-locking the end cover; 9-a second baffle ring; 10-a second set of cups; 11-first baffle ring.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The magnetic suspension high-speed motor rotor structure shown in fig. 1 to 3 comprises a rotor shaft body 1 and a plurality of radial bearings;
a plurality of radial bearings are respectively sleeved on the rotor shaft body 1, a first gap is formed between the inner ring surface of each radial bearing and the outer ring surface of the rotor shaft body 1, a sleeve cup assembly is arranged in each first gap and is connected with the rotor shaft body 1 in a matched mode, and a second gap is formed between each sleeve cup assembly and the inner ring surface of each radial bearing.
The function of the sleeve cup assembly is to separate the radial bearing from the rotor shaft body 1.
The magnetic suspension high-speed motor rotor structure comprises a rotor shaft body 1, a plurality of radial bearings and a plurality of magnetic bearings, wherein when the motor is in a non-running state, the magnetic bearings are in a non-running state, the rotor shaft body 1 is supported by the radial bearings, namely the lower part of the outer ring surface of the rotor shaft body 1 is in contact with the lower part of the inner ring surface of the radial bearings; when the motor is in a running state, the magnetic bearing runs to generate magnetic force to lift the rotor shaft body 1, the rotor shaft body 1 is separated from the radial bearing, a first gap is formed between the outer ring surface of the rotor bearing and the inner ring surface of the radial bearing at the moment, and the rotor shaft body 1 is under the action of the magnetic force in the rotating process, so that the rotor bearing and the radial bearing are in a non-contact state, and the radial bearing is in a relative static state.
When the motor in service breaks down, the magnetic force of magnetic bearing disappears, can take place the unstability of rotor shaft body 1 or fall, rotor shaft body 1 can fall on journal bearing, the outer anchor ring of the rotor shaft body 1 of high-speed rotation this moment can contact with journal bearing's interior anchor ring, rotor shaft body 1 is still in the rotation state this moment, journal bearing is in relative quiescent condition, both have great rotational speed difference, in the twinkling of an eye of contact, relative friction takes place between the contact surface of both, produce high temperature under the friction condition, lead to rotor shaft body 1's outer anchor ring and journal bearing's interior anchor ring to take place the hot melt and lead to high temperature welding under high temperature condition, finally make rigid coupling together between rotor shaft body 1 and the journal bearing.
This scheme establishes the cover cup subassembly at 1 overcoat of rotor shaft body, the cover cup subassembly plays the guard action to rotor shaft body 1, the cover cup subassembly is located between the outer anchor ring of rotor shaft body 1 and journal bearing's the inner ring face, when taking place the unstability of rotor shaft body 1 or fall, the outer anchor ring of cover cup subassembly and journal bearing's the inner ring face contact, because the cooperation is connected between cover cup subassembly and the rotor shaft body 1, consequently when the outer anchor ring of cover cup subassembly and journal bearing's the inner ring face because high temperature welding and rigid coupling are together, can replace the cover cup subassembly alone, only scrap journal bearing and cover cup subassembly this moment, and change corresponding part can, need not to scrap the rotor subassembly.
In an alternative embodiment, one end of the rotor shaft body 1 is a shaft body front end 2, the other end of the rotor shaft body 1 is a shaft body rear end 3, the plurality of radial bearings comprise a first bearing 5 and a second bearing 6, the first bearing 5 is sleeved at the shaft body front end 2, and the second bearing 6 is sleeved at the shaft body rear end 3;
the retainer cup subassembly includes first retainer cup 4 and second retainer cup 10, and first retainer cup 4 is connected with the cooperation of axis body front end 2, and second retainer cup 10 is connected with the cooperation of axis body rear end 3.
In an alternative embodiment, the first sleeve 4 is in an interference fit with the front end 2 of the shaft, and one end of the first sleeve 4 abuts against a boss on the rotor shaft 1.
In an alternative embodiment, the second sleeve 10 is an interference or transition fit with the rear shaft end 3, and one end of the second sleeve 10 abuts a boss on the rotor shaft body 1.
In an alternative embodiment, a first stop ring 11 is arranged at the abutting position of the second sleeve cup 10, one side end surface of the first stop ring 11 abuts against a shaft joint on the rotor shaft body 1, and a third gap exists between the other side end surface of the first stop ring 11 and the side end surface of the second bearing 6.
In an optional embodiment, a thrust disc 7 is arranged at the rear end 3 of the shaft body, a second retaining ring 9 is arranged between the second sleeve cup 10 and the thrust disc 7, the second retaining ring 9 is sleeved on the rear end 3 of the shaft body, the second retaining ring 9 is in clearance fit with the rear end 3 of the shaft body, one side end surface of the second retaining ring 9 abuts against the second sleeve cup 10, and the other side end surface of the second retaining ring 9 abuts against the thrust disc 7.
The rotor shaft body 1 is respectively provided with a shaft joint at the position close to the two ends, and the shaft sections between the shaft joints and the end parts are respectively a shaft body front end 2 and a shaft body rear end 3. Wherein the axis body front end 2 needs to assemble with the load, and the axis body rear end 3 is equipped with thrust dish 7 and locking end cover 8 for carry out axial locking to rotor axis body 1.
The first sleeve cup 4 is in interference fit with the front end 2 of the shaft body, the first sleeve cup 4 is only subjected to radial force in an accident state, the damage probability is small, meanwhile, the end is a load assembly end and cannot be axially locked, the second sleeve cup 10 is in transition fit or interference fit with the rear end 3 of the shaft body, the second sleeve cup 10 is simultaneously subjected to radial and axial acting force in the accident state, collision or rolling between the second sleeve cup and the second bearing 6 is easily caused, the high-temperature welding probability of the second sleeve cup and the second bearing is large, in order to avoid collision or rolling between the second bearing 6 and a shaft joint on the rotor shaft body 1, which is close to the rear end 3 of the shaft body, the first baffle ring 11 is arranged on the second sleeve cup 10, a third gap exists between one side end face of the first baffle ring 11 and the second bearing 6, and when the rotor shaft body 1 normally runs, the first baffle ring 11 and the second bearing 6 are in a non-contact state, when the rotor shaft body 1 is displaced axially, the first retaining ring 11 contacts the second bearing 6, and at the moment, the first retaining ring 11 acts on the first sleeve cup 4 and the second sleeve cup 10.
Shaft body rear end 3 has second fender ring 9, thrust disc 7 and locking end cover 8 in proper order, and thrust disc 7 and locking end cover 8 carry out axial locking to rotor shaft body 1, and second fender ring 9 and rotor shaft body 1 clearance fit can often take place to dismantle when dismouting motor. The second retainer 9 serves to prevent the second sleeve 10 from coming into contact with the thrust disk 7 when the rotor shaft body 1 is displaced axially.
In an alternative embodiment, the outer circumferential surfaces of the first sleeve 4 and the second sleeve 10 are provided with a plating.
In an alternative embodiment, the end face of the first stop ring 11 on the side close to the second bearing 6 is provided with a coating.
In an alternative embodiment, both side end faces of the second retainer ring 9 are respectively provided with a plating layer.
In an alternative embodiment, the coating is a molybdenum disulfide material.
First set of cup 4 and second set of cup 10 adopt the carbide steel material, and the outer annular surface of both plates establishes the molybdenum disulfide cladding material, and the corresponding terminal surface that first fender ring 11 and second keep off ring 9 plates establishes the molybdenum disulfide cladding material, and molybdenum disulfide can be high temperature resistant in order to have good lubrication action.
In the scheme, in the magnetic suspension high-speed motor under the condition of some special applications, the rotor shaft body 1 of the magnetic suspension high-speed motor needs to be made of a non-magnetic-conductivity material, such as a stainless steel material, the hardness and the strength of the magnetic suspension high-speed motor cannot meet the requirements, at the moment, the strength requirement of the rotor shaft body 1 at the radial bearing position can be met by processing the first sleeve cup 4 and the second sleeve cup 10 at the radial bearing position, the magnetic bearing fault in the operation process is ensured, and the integrity of the rotor shaft body 1 is reduced under the condition that the rotor shaft body 1 falls.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that the following embodiments are merely illustrative of the present invention, and not restrictive, and the scope of the present invention is not limited thereto: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A magnetic suspension high-speed motor rotor structure is characterized by comprising a rotor shaft body (1) and a plurality of radial bearings;
the radial bearings are respectively sleeved on the rotor shaft body (1), a first gap is formed between the inner ring surface of each radial bearing and the outer ring surface of the rotor shaft body (1), a sleeve cup assembly is arranged in each first gap and is connected with the rotor shaft body (1) in a matched mode, and a second gap is formed between each sleeve cup assembly and the inner ring surface of each radial bearing;
one end of the rotor shaft body (1) is a shaft body front end (2), the other end of the rotor shaft body (1) is a shaft body rear end (3), the plurality of radial bearings comprise first bearings (5) and second bearings (6), the first bearings (5) are sleeved at the shaft body front end (2), and the second bearings (6) are sleeved at the shaft body rear end (3);
the sleeve cup assembly comprises a first sleeve cup (4) and a second sleeve cup (10), the first sleeve cup (4) is connected with the front end (2) of the shaft body in a matched mode, and the second sleeve cup (10) is connected with the rear end (3) of the shaft body in a matched mode;
the second sleeve cup (10) is in interference fit or transition fit with the rear end (3) of the shaft body, and one end of the second sleeve cup (10) is abutted to a shaft joint on the rotor shaft body (1);
a thrust disc (7) is arranged at the rear end (3) of the shaft body, a second baffle ring (9) is arranged between the second sleeve cup (10) and the thrust disc (7), the second baffle ring (9) is sleeved on the rear end (3) of the shaft body, the second baffle ring (9) is in clearance fit with the rear end (3) of the shaft body, one side end face of the second baffle ring (9) is abutted to the second sleeve cup (10), and the other side end face of the second baffle ring (9) is abutted to the thrust disc (7);
and the end surfaces of two sides of the second baffle ring (9) are respectively provided with a plating layer.
2. The magnetic levitation high-speed motor rotor structure according to claim 1, wherein the first sleeve cup (4) is in interference fit with the front end (2) of the rotor body, and one end of the first sleeve cup (4) abuts against a shaft joint on the rotor shaft body (1).
3. The magnetic suspension high-speed motor rotor structure according to claim 1, characterized in that the abutting position of the second sleeve cup (10) is provided with a first baffle ring (11), one side end surface of the first baffle ring (11) abuts against a shaft joint on the rotor shaft body (1), and a third clearance exists between the other side end surface of the first baffle ring (11) and the side end surface of the second bearing (6).
4. The structure of a magnetically levitated high-speed motor rotor according to claim 1, characterized in that the outer circumferential surfaces of the first sleeve cup (4) and the second sleeve cup (10) are provided with a plating layer.
5. The structure of a magnetic levitation high-speed motor rotor as recited in claim 3, wherein the end surface of the first baffle ring (11) near the second bearing (6) is coated.
6. The magnetic levitation high-speed motor rotor structure as recited in any one of claims 1, 4 or 5, wherein the coating is molybdenum disulfide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011547041.4A CN112290708B (en) | 2020-12-24 | 2020-12-24 | Magnetic suspension high-speed motor rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011547041.4A CN112290708B (en) | 2020-12-24 | 2020-12-24 | Magnetic suspension high-speed motor rotor structure |
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| Publication Number | Publication Date |
|---|---|
| CN112290708A CN112290708A (en) | 2021-01-29 |
| CN112290708B true CN112290708B (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011547041.4A Active CN112290708B (en) | 2020-12-24 | 2020-12-24 | Magnetic suspension high-speed motor rotor structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113864339A (en) * | 2021-10-28 | 2021-12-31 | 珠海格力电器股份有限公司 | Rotating shaft protection structure and magnetic suspension compressor |
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| CN103233984A (en) * | 2013-04-07 | 2013-08-07 | 哈尔滨工程大学 | Auxiliary support for vertical magnetic suspension flywheel rotor |
| CN104296993A (en) * | 2014-09-25 | 2015-01-21 | 北京航空航天大学 | Axial magnetic bearing static characteristic testing device |
| CN106321633A (en) * | 2016-11-07 | 2017-01-11 | 湘潭大学 | Novel mixing magnetic bearing |
| CN107240981A (en) * | 2017-05-10 | 2017-10-10 | 哈尔滨工程大学 | A kind of removable magnetic levitation energy storage flywheel rotor |
| CN109322917A (en) * | 2018-11-05 | 2019-02-12 | 南京航空航天大学 | A kind of radial and axial protection structure of magnetic suspension bearing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205747927U (en) * | 2016-06-30 | 2016-11-30 | 唐山三友化工股份有限公司 | The star-like discharging sealing device of large-scale batch mixing formula mechanical shaft kiln kiln bottom |
| CN208508669U (en) * | 2018-07-06 | 2019-02-15 | 华北理工大学 | A kind of motor rotor structure |
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2020
- 2020-12-24 CN CN202011547041.4A patent/CN112290708B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233984A (en) * | 2013-04-07 | 2013-08-07 | 哈尔滨工程大学 | Auxiliary support for vertical magnetic suspension flywheel rotor |
| CN104296993A (en) * | 2014-09-25 | 2015-01-21 | 北京航空航天大学 | Axial magnetic bearing static characteristic testing device |
| CN106321633A (en) * | 2016-11-07 | 2017-01-11 | 湘潭大学 | Novel mixing magnetic bearing |
| CN107240981A (en) * | 2017-05-10 | 2017-10-10 | 哈尔滨工程大学 | A kind of removable magnetic levitation energy storage flywheel rotor |
| CN109322917A (en) * | 2018-11-05 | 2019-02-12 | 南京航空航天大学 | A kind of radial and axial protection structure of magnetic suspension bearing |
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| Publication number | Publication date |
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| CN112290708A (en) | 2021-01-29 |
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Address after: 300457 Block D, No. 90, Twelfth Avenue, Tianjin Development Zone, Binhai New Area, Tianjin Patentee after: Tianjin Feixuan Technology Co.,Ltd. Address before: 300457 Block D, No. 90, Twelfth Avenue, Tianjin Development Zone, Binhai New Area, Tianjin Patentee before: TIANJIN EMAGING TECHNOLOGY Co.,Ltd. |
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