CN106712365A - Combined bearing magnetic suspension motor/electric spindle - Google Patents
Combined bearing magnetic suspension motor/electric spindle Download PDFInfo
- Publication number
- CN106712365A CN106712365A CN201510775217.4A CN201510775217A CN106712365A CN 106712365 A CN106712365 A CN 106712365A CN 201510775217 A CN201510775217 A CN 201510775217A CN 106712365 A CN106712365 A CN 106712365A
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- China
- Prior art keywords
- magnetic suspension
- bearing
- rotor
- motor
- rolling bearing
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Abstract
The invention relates to a structural improvement on a magnetic suspension motor/electric spindle, which belongs to the technical field of magnetic suspension power devices. The motor/electric spindle comprises a stator and a rotor, and the rotor is supported on an end cover through magnetic suspension bearings at two ends. The improvement lies in that the rotor is also provided with a rolling bearing; and the fit clearance between the outer ring of the rolling bearing and the end cover is smaller than the magnetic suspension clearance. At work, in a condition of normal load, the stator is in a magnetic suspension state to work, and advantages that the magnetic suspension bearing barely has friction, the working is smooth and no noise exists are realized; and in the case of large load or existence of a disturbing force, the load acts on the rolling bearing, and the magnetic suspension bearing can be prevented from being damaged under the force. With a simple and reasonable structure and in a condition of limited cost increasing, the bearing ability and the adaptability of the magnetic suspension bearing can be improved obviously.
Description
Technical field
The present invention relates to the structure improvement of a kind of motor/electro spindle, especially a kind of magnetic suspension motor/electric main shaft, belong to magnetic suspension power unit technical field.
Background technology
Magnetic suspension motor/electric main shaft has significant advantage in terms of high-speed, high precision machining than common main shaft, therefore has a extensive future.Retrieval find, the applying date be 02109707.0, it is entitled《Mixed rotor type bearing-free motor》Chinese patent application disclose a kind of mixed rotor type bearing-free motor being made up of housing, stator, winding, rotor, load etc., the motor is coupled by mechanical axis, and can get both torque and magnetic suspension force index simultaneously.Additionally, Application No. 03232489.8, entitled《Magnetic suspension motor)》Patent application disclose a kind of magnetic suspension motor, including motor housing, central shaft, coil, permanent magnet, oscillator, also including a coasting body through central shaft, its advantage is that the design of coasting body then increased the stability of motion under high frequency state.
However, it has been found that existing magnetic suspension motor/electric main shaft bears the limited in one's ability of load, being especially difficult to bear perturbed force, therefore used occasion that is larger or having mutation is loaded, it is easy to damage.
The content of the invention
The technical problem to be solved in the present invention is：For the shortcoming that above prior art is present, improved by structure, propose a kind of combination bearing magnetic suspension motor/electric main shaft that can be born compared with big load.
In order to solve above technical problem, combination bearing magnetic suspension motor/electric main shaft of the invention includes stator and rotor, the rotor is supported on end cap by the magnetic suspension bearing at two ends, it is theed improvement is that, the rotor is also equipped with rolling bearing, and the rolling bearing outer shroud is less than magnetic suspension gap with the fit clearance of end cap.
During work, in the case of normal load, stator is operated in magnetic suspension state, with magnetic suspension bearing almost zerofriction force, smooth running, noiseless advantage, when load is larger or runs into perturbed force, load is acted on rolling bearing, is damaged so as to avoid magnetic suspension shaft from withstanding forces.
As can be seen here, the present invention, in the case where cost increase is limited, significantly improves the bearing capacity and adaptability of magnetic suspension bearing with the structure of advantages of simple.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of one embodiment of the invention.
Specific embodiment
Embodiment one
The combination bearing magnetic levitaion motor (or electro spindle) of the present embodiment is as shown in figure 1, the two ends of stator 8 fixedly mount drive end bearing bracket 6 and rear end cap 11 respectively.It is the iron core 9 for being wound with coil 10 in stator 8.Rotor 1 is supported on drive end bearing bracket 6 and rear end cap 11 by the magnetic suspension bearing at two ends.The outer shroud 5 and inner ring 4 that magnetic suspension bearing is made up of ndfeb magnetic material are constituted, two rings form magnetic suspension gap with opposite polarity relative inner conical surface and male cone (strobilus masculinus) respectively, so can both bear certain radial load, can also bear axial force, the action effect of radial thrust bearing is formed, makes compact conformation.Two outer ends that rotor 1 closes on magnetic suspension bearing are also equipped with rolling bearing 2.Rolling bearing ground outer shroud is less than magnetic suspension gap with the fit clearance of end cap, in order to avoid outer shroud is rotated, the sealing ring 3 of damping action has been embedded with two end cap installs the endoporus of rolling bearing outer shroud.
In normal operation, stator runs at high speed under the magnetic suspension bearing support with radial thrust bearing action effect.When load is larger or runs into Radial Perturbation power, active force is delivered on rolling bearing, so as to avoid the mutual friction damage of NdFeB material.
Experiment shows that the combination bearing magnetic levitaion motor (electro spindle) of the present embodiment can significantly improve the bearing capacity and adaptability of magnetic suspension bearing, greatly prolong its service life.
In addition to the implementation, the present invention can also have other embodiment.The technical scheme that all use equivalents or equivalent transformation are formed, all falls within the protection domain of application claims.
Claims (4)
1. a kind of combination bearing magnetic suspension motor/electric main shaft, including stator and rotor, the rotor are supported on end cap by the magnetic suspension bearing at two ends, it is characterised in that：The rotor is also equipped with rolling bearing, and the rolling bearing outer shroud is less than magnetic suspension gap with the fit clearance of end cap.
2. combination bearing magnetic suspension motor/electric main shaft according to claim 1, it is characterised in that：The outer shroud and inner ring that the magnetic suspension bearing is made up of ferromagnetic material are constituted, and two rings form magnetic suspension gap with opposite polarity relative inner conical surface and male cone (strobilus masculinus) respectively.
3. combination bearing magnetic suspension motor/electric main shaft according to claim 2, it is characterised in that：Two outer ends that the rotor closes on magnetic suspension bearing are equipped with rolling bearing.
4. the combination bearing magnetic suspension motor/electric main shaft according to Claims 2 or 3, it is characterised in that：The sealing ring of damping action has been embedded with the endoporus of the end cap installation rolling bearing outer shroud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510775217.4A CN106712365A (en) | 2015-11-15 | 2015-11-15 | Combined bearing magnetic suspension motor/electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510775217.4A CN106712365A (en) | 2015-11-15 | 2015-11-15 | Combined bearing magnetic suspension motor/electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106712365A true CN106712365A (en) | 2017-05-24 |
Family
ID=58931794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510775217.4A Withdrawn CN106712365A (en) | 2015-11-15 | 2015-11-15 | Combined bearing magnetic suspension motor/electric spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106712365A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177868A (en) * | 2019-07-01 | 2021-01-05 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Self-aligning magnetic suspension bearing system and generator |
| CN113523324A (en) * | 2021-09-15 | 2021-10-22 | 常州勇前机电科技有限公司 | Gap adjustable magnetic suspension electric spindle |
-
2015
- 2015-11-15 CN CN201510775217.4A patent/CN106712365A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177868A (en) * | 2019-07-01 | 2021-01-05 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Self-aligning magnetic suspension bearing system and generator |
| CN112177868B (en) * | 2019-07-01 | 2022-04-12 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Self-aligning magnetic suspension bearing system and generator |
| CN113523324A (en) * | 2021-09-15 | 2021-10-22 | 常州勇前机电科技有限公司 | Gap adjustable magnetic suspension electric spindle |
| CN113523324B (en) * | 2021-09-15 | 2021-12-03 | 常州勇前机电科技有限公司 | Gap adjustable magnetic suspension electric spindle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170524 |
|
| WW01 | Invention patent application withdrawn after publication |