CN108054850B - Thrust disc fixing structure in magnetic suspension motor rotor - Google Patents
Thrust disc fixing structure in magnetic suspension motor rotor Download PDFInfo
- Publication number
- CN108054850B CN108054850B CN201711452958.4A CN201711452958A CN108054850B CN 108054850 B CN108054850 B CN 108054850B CN 201711452958 A CN201711452958 A CN 201711452958A CN 108054850 B CN108054850 B CN 108054850B
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- CN
- China
- Prior art keywords
- thrust
- thrust disc
- magnetic bearing
- bearing
- sleeve
- Prior art date
- Legal status (The legal status 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 status listed.)
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Links
- 239000000725 suspension Substances 0.000 title claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000005339 levitation Methods 0.000 claims description 4
- 229910001104 4140 steel Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
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- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/03—Machines characterised by thrust bearings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Support Of The Bearing (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a thrust disc fixing structure in a magnetic suspension motor rotor, wherein a thrust disc and a thrust disc fixing top sleeve are sleeved on a mandrel, the thrust disc fixing top sleeve and the mandrel are in interference fit, the thrust disc fixing top sleeve is abutted against the thrust disc, the thrust disc is abutted against the mandrel, and one end of the thrust disc is arranged between an upper thrust magnetic bearing and a lower thrust magnetic bearing; the shaft sleeve and the bearing end cover are both sleeved on the mandrel, the shaft end screw is in threaded connection with the tail end of the mandrel, the shaft end screw is abutted on the bearing end cover, the bearing end cover is abutted on the shaft sleeve, and the shaft sleeve is abutted on the fixed top sleeve of the thrust disc. The invention has simple structure, the thrust disc fixing top sleeve is made of different materials from the thrust disc, and is assembled on the mandrel by using an interference assembly process, so that the phenomenon that the interference disappears in the environment of eccentricity and thermal expansion at high rotating speed can be avoided. The thrust disk is propped by the thrust disk fixing sleeve, so that the thrust disk is prevented from generating axial transmission and damaging the thrust magnetic bearing.
Description
Technical field:
the invention relates to a thrust disc fixing structure in a magnetic suspension motor rotor.
The background technology is as follows:
in existing magnetic levitation centrifugal machines, some of the rotor components use an interference fit process, such as a thrust disc. The rotating speed of the magnetic suspension motor is higher and is generally more than 20000r/min, and due to the specificity of the thrust disc material, the interference of the thrust disc can disappear under the environment of high rotating speed eccentricity and thermal expansion, and potential safety hazards exist in use.
The invention comprises the following steps:
the invention aims to solve the problems in the prior art and provides a thrust disc fixing structure in a rotor of a magnetic suspension motor.
The invention adopts the technical scheme that: the thrust disc fixing structure in the magnetic suspension motor rotor comprises a magnetic bearing seat, a mandrel, a radial magnetic bearing, an upper thrust magnetic bearing and a lower thrust magnetic bearing, wherein the radial magnetic bearing, the upper thrust magnetic bearing and the lower thrust magnetic bearing are all fixed in the magnetic bearing seat, the mandrel is supported in the radial magnetic bearing, the upper thrust magnetic bearing and the lower thrust magnetic bearing, the thrust disc fixing top sleeve, a shaft sleeve, a bearing end cover and shaft end screws are also included, the thrust disc and the thrust disc fixing top sleeve are all sleeved on the mandrel, the thrust disc fixing top sleeve and the mandrel are in interference fit, the thrust disc fixing top sleeve is abutted against the thrust disc, the thrust disc is abutted against the mandrel, and one end of the thrust disc is arranged between the upper thrust magnetic bearing and the lower thrust magnetic bearing;
the shaft sleeve and the bearing end cover are both sleeved on the mandrel, the shaft end screw is in threaded connection with the tail end of the mandrel, the shaft end screw is abutted against the bearing end cover, the bearing end cover is abutted against the shaft sleeve, and the shaft sleeve is abutted against the thrust disc fixing top sleeve;
the thrust disc fixing top sleeve is made of 4140 steel.
The thrust disc is made of pure iron.
Further, the thrust disc fixing top sleeve is T-shaped.
Further, the side wall of the upper port of the shaft sleeve extends outwards to form a positioning edge which is abutted against the fixed top sleeve of the thrust disc.
Further, a step hole is formed in the axis direction of the bearing end cover, and a boss portion is arranged on the upper end face of the bearing end cover.
The invention has the following beneficial effects: the invention has simple structure, the thrust disc fixing top sleeve is made of different materials from the thrust disc, and is assembled on the mandrel by using an interference assembly process, so that the phenomenon that the interference disappears in the environment of eccentricity and thermal expansion at high rotating speed can be avoided. The thrust disk is propped by the thrust disk fixing sleeve, so that the thrust disk is prevented from generating axial transmission and damaging the thrust magnetic bearing.
Description of the drawings:
fig. 1 is a structural diagram of the present invention.
Fig. 2 is a block diagram of a thrust disc, a thrust disc fixed top sleeve, a shaft sleeve and a bearing end cover in the present invention.
The specific embodiment is as follows:
the invention is further described below with reference to the accompanying drawings.
The invention discloses a thrust disc fixing structure in a magnetic suspension motor rotor, which comprises a magnetic bearing seat 1, a mandrel 2, a radial magnetic bearing 3, an upper thrust magnetic bearing 4, a lower thrust magnetic bearing 5, a thrust disc 6, a thrust disc fixing top sleeve 7, a shaft sleeve 8, a bearing end cover 9 and a shaft end screw 10, wherein the radial magnetic bearing 3, the upper thrust magnetic bearing 4 and the lower thrust magnetic bearing 5 are all fixed in the magnetic bearing seat 1, the mandrel 2 is supported in the radial magnetic bearing 3, the upper thrust magnetic bearing 4 and the lower thrust magnetic bearing 5, the thrust disc 6 and the thrust disc fixing top sleeve 7 are all sleeved on the mandrel 2, the thrust disc 6, the thrust disc fixing top sleeve 7 and the mandrel 2 are in interference fit, the thrust disc fixing top sleeve 7 is abutted against the thrust disc 6, one end of the thrust disc 6 is arranged between the upper thrust magnetic bearing 4 and the lower thrust magnetic bearing 5. The shaft sleeve 8 and the bearing end cover 9 are both sleeved on the mandrel 2, the shaft end screw 10 is in threaded connection with the tail end of the mandrel 2, the shaft end screw 10 is abutted on the bearing end cover 9, the bearing end cover 9 is abutted on the shaft sleeve 8, the shaft sleeve 8 is abutted on the thrust disc fixing top sleeve 7, and the thrust disc fixing top sleeve 7 is abutted on the mandrel 2 with the thrust disc 6.
The thrust disc fixing top sleeve 7 is made of 4140 steel, and the thrust disc 6 is made of pure iron. The interference of the thrust disc fixing top sleeve 7 is larger than that of the thrust disc 6. In the high-speed rotating process of the magnetic suspension motor, as the thrust disc fixing top sleeve 7 is made of different materials from the thrust disc 6, the thrust disc fixing top sleeve 7 can axially limit the thrust disc 6, and the phenomenon that the thrust disc 6 axially moves due to the disappearance of interference under the environment of eccentricity and thermal expansion at a high rotating speed is avoided.
The thrust disc 6 of the invention is an integrated structure and comprises a body 61, wherein the axis direction of the body 61 is provided with an axial hole, the outer circumferential wall of the lower port of the body 61 extends outwards to form a disc body 63, the disc body 63 is arranged between the upper thrust magnetic bearing 4 and the lower thrust magnetic bearing 5, and the outer circumferential wall of the upper port of the body 61 extends outwards to form a collision edge 62. The abutting edge 62 abuts against the radial magnetic bearing 3, and the abutting edge 62 increases the contact area with the radial magnetic bearing 3. The integral thrust disc 6 has the advantages of reduced parts, convenient processing and simplified assembly process.
The thrust disc fixing top cover 7 is T-shaped. The side wall of the upper port of the sleeve 8 extends outwards and forms a positioning edge 81, and the positioning edge 81 abuts against the fixed top sleeve 7 of the thrust disc.
The bearing end cap 9 has a stepped hole 90 in the axial direction, and the upper end surface of the bearing end cap 9 has a boss 91. The abutment surface of the boss 91 abuts against the boss 8, and the step surface of the step hole 90 abuts against the end surface of the spindle 2.
The invention has simple structure, the thrust disc fixing top sleeve 7 is made of different materials from the thrust disc 6, and is assembled on the mandrel 2 by using an interference assembly process, so that the phenomenon that the interference disappears in the environment of eccentricity and thermal expansion at high rotating speed can be avoided. The thrust disk is propped by the thrust disk fixing sleeve, so that the thrust disk is prevented from generating axial transmission and damaging the thrust magnetic bearing.
The foregoing is merely a preferred embodiment of the invention, and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the invention, which modifications would also be considered to be within the scope of the invention.
Claims (4)
1. The utility model provides a thrust disk fixed knot in magnetic suspension motor rotor constructs, includes magnetic bearing seat (1), dabber (2), radial magnetic bearing (3), goes up thrust magnetic bearing (4) and lower thrust magnetic bearing (5), radial magnetic bearing (3), go up thrust magnetic bearing (4) and lower thrust magnetic bearing (5) all are fixed in magnetic bearing seat (1), in radial magnetic bearing (3), go up thrust magnetic bearing (4) and lower thrust magnetic bearing (5), dabber (2) support, its characterized in that: the novel high-speed magnetic bearing comprises a spindle (2), and is characterized by further comprising a thrust disc (6), a thrust disc fixing top sleeve (7), a shaft sleeve (8), a bearing end cover (9) and a shaft end screw (10), wherein the thrust disc (6) and the thrust disc fixing top sleeve (7) are sleeved on the spindle (2), the thrust disc (6), the thrust disc fixing top sleeve (7) and the spindle (2) are in interference fit, the thrust disc fixing top sleeve (7) is abutted against the thrust disc (6), the thrust disc (6) is abutted against the spindle (2), and one end of the thrust disc (6) is arranged between an upper thrust magnetic bearing (4) and a lower thrust magnetic bearing (5);
the shaft sleeve (8) and the bearing end cover (9) are sleeved on the mandrel (2), the shaft end screw (10) is in threaded connection with the tail end of the mandrel (2), the shaft end screw (10) is abutted against the bearing end cover (9), the bearing end cover (9) is abutted against the shaft sleeve (8), and the shaft sleeve (8) is abutted against the thrust disc fixing top sleeve (7);
the thrust disc fixing top sleeve (7) is made of 4140 steel.
The thrust disc (6) is made of pure iron.
2. A thrust disc fixing structure in a magnetic levitation motor rotor as set forth in claim 1, wherein: the thrust disc fixing top sleeve (7) is T-shaped.
3. A thrust disc fixing structure in a magnetic levitation motor rotor as set forth in claim 1, wherein: the side wall of the upper port of the shaft sleeve (8) extends outwards to form a positioning edge (81), and the positioning edge (81) is abutted against the thrust disc fixing top sleeve (7).
4. A thrust disc fixing structure in a magnetic levitation motor rotor as set forth in claim 1, wherein: the axial direction of the bearing end cover (9) is provided with a step hole (90), and the upper end surface of the bearing end cover (9) is provided with a boss part (91).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711452958.4A CN108054850B (en) | 2017-12-28 | 2017-12-28 | Thrust disc fixing structure in magnetic suspension motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711452958.4A CN108054850B (en) | 2017-12-28 | 2017-12-28 | Thrust disc fixing structure in magnetic suspension motor rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108054850A CN108054850A (en) | 2018-05-18 |
| CN108054850B true CN108054850B (en) | 2024-03-15 |
Family
ID=62128393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711452958.4A Active CN108054850B (en) | 2017-12-28 | 2017-12-28 | Thrust disc fixing structure in magnetic suspension motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108054850B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001214935A (en) * | 2000-01-31 | 2001-08-10 | Shibaura Mechatronics Corp | Magnetic bearing motor |
| CN201113654Y (en) * | 2007-07-18 | 2008-09-10 | 重庆德马变频电机研发制造有限公司 | Magnetic suspension bearing electric motor |
| CN105864291A (en) * | 2016-05-05 | 2016-08-17 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, supporting device and motor assembly |
| CN106505780A (en) * | 2016-12-15 | 2017-03-15 | 南通金驰机电有限公司 | A kind of magnetic suspension permanent magnet direct-drive high-speed motor |
| CN207719933U (en) * | 2017-12-28 | 2018-08-10 | 南京磁谷科技有限公司 | A kind of thrust disc fixed structure in magnetic suspension motor rotor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3089332B1 (en) * | 2015-04-29 | 2019-10-23 | Skf Magnetic Mechatronics | Rotary machine |
-
2017
- 2017-12-28 CN CN201711452958.4A patent/CN108054850B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001214935A (en) * | 2000-01-31 | 2001-08-10 | Shibaura Mechatronics Corp | Magnetic bearing motor |
| CN201113654Y (en) * | 2007-07-18 | 2008-09-10 | 重庆德马变频电机研发制造有限公司 | Magnetic suspension bearing electric motor |
| CN105864291A (en) * | 2016-05-05 | 2016-08-17 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, supporting device and motor assembly |
| CN106505780A (en) * | 2016-12-15 | 2017-03-15 | 南通金驰机电有限公司 | A kind of magnetic suspension permanent magnet direct-drive high-speed motor |
| CN207719933U (en) * | 2017-12-28 | 2018-08-10 | 南京磁谷科技有限公司 | A kind of thrust disc fixed structure in magnetic suspension motor rotor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108054850A (en) | 2018-05-18 |
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Address after: 211102 No. 100 Jiuzhu Road, Jiangning Development Zone, Nanjing, Jiangsu Province Patentee after: Nanjing Cigu Technology Co.,Ltd. Country or region after: Zhong Guo Address before: 211102 No. 100 Jiuzhu Road, Jiangning Development Zone, Nanjing, Jiangsu Province Patentee before: NANJING CIGU Ltd.,Corp. Country or region before: Zhong Guo |
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