CN103956847A - High-speed motorized spindle using permanent magnets instead of bearings - Google Patents
High-speed motorized spindle using permanent magnets instead of bearings Download PDFInfo
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- CN103956847A CN103956847A CN201410203807.5A CN201410203807A CN103956847A CN 103956847 A CN103956847 A CN 103956847A CN 201410203807 A CN201410203807 A CN 201410203807A CN 103956847 A CN103956847 A CN 103956847A
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- permanent magnet
- magnet assembly
- bearing
- main shaft
- electric main
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Abstract
The invention discloses a high-speed motorized spindle using permanent magnets instead of bearings. The high-speed motorized spindle comprises a machine body, a stator and a rotor central spindle, wherein the stator and the rotor central spindle are installed in the machine body. The high-speed motorized spindle further comprises a front permanent magnet assembly and a rear permanent magnet assembly, wherein the front permanent magnet assembly and the rear permanent magnet assembly are installed at the two ends of the rotor central spindle respectively and fixed through a front lock nut and a rear lock nut respectively. Due to the principle of homopolar repulsion of the permanent magnets, the rotor central spindle of the motorized spindle suspends in the center; due to the non-contact type structure, movement is free of friction, the rotating speed higher than the rotating speed of traditional bearings such as ball bearings can be achieved, and the phenomenon that the motorized spindle consumes a large amount of energy like a gas-lubricated bearing cannot happen; the high-speed motorized spindle is higher in adaptive capacity to the environment and can adapt to severe service environments, cooling liquid is used for effectively cooling the motorized spindle, and the service life of the motorized spindle at a high rotating speed is ensured.
Description
Technical field
The present invention relates to a kind of electric main shaft, be specifically related to a kind of electric main shaft that replaces bearing with permanent magnet, belong to electromechanical engineering field.
Background technology
High-speed electric main shaft is that spindle motor is in-built, thereby realizes the power part of the electromechanical integration of the functions such as high rotating speed, high accuracy and high efficiency, is mainly used in high-speed processing machine tool, realizes the high rotating speed processing to different materials, improves working (machining) efficiency.
Current electric main shaft on the market adopts rolling bearing, aerostatic bearing or hydrodynamic journal liquid polymers to support more.For rolling bearing, although there is higher rigidity, can not go up ultrahigh rotating speed; Although aerostatic bearing can make the rotating speed of main shaft improve, because gap is little, to having relatively high expectations of source of the gas, reliability deficiency, what easily occur that pneumatic hammer or other reason cause is sudden stuck, simultaneously also relatively power consumption; Hydrodynamic journal liquid polymers are due to the restriction of liquid viscosity and other factors, are applied in main shaft rotating speed generally all lower.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of electric main shaft that adopts permanent magnet to replace traditional bearing, realize high speed rotating and reliable performance.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
A kind of high-speed electric main shaft of applying permanent magnet replacement bearing, comprise body, be installed on stator and the armature spindle core of internal body, also comprise the front permanent magnet assembly being fixed by front locking nut and rear locking nut respectively and the rear permanent magnet assembly that are installed on armature spindle core two ends, a connecting seat is installed in the rear end of described body, fixes a power connection on Connection Block;
Described front permanent magnet assembly and rear permanent magnet assembly include: two pairs of annular magnet Internal and external cycles and be arranged at spacer between the two, described annular magnet Internal and external cycle comprises: be set in annular magnet inner ring on armature spindle core, be installed on the annular magnet outer ring on bearing pedestal, annular magnet inner ring and annular magnet outer ring one side adjacent one another are is inclined-plane and is like pole, and the incline direction on the inclined-plane of adjacent two pairs of annular magnet Internal and external cycles is contrary.
As a kind of embodiment, the interior ring of aforementioned annular magnet inner ring is that the S utmost point, outer shroud are the N utmost points, and the interior ring of described annular magnet outer ring is that the N utmost point, outer shroud are the S utmost points, and two adjacent faces are all the N utmost points.
Further, aforementioned rear permanent magnet assembly is installed on rear bearing block, and described rear bearing block is contained in internal body and can slides axially with respect to body.
Further, aforementioned Connection Block is provided with cooling fluid entrance and cooling liquid outlet, and described Connection Block and internal body are formed with the cooling passage being connected with cooling fluid entrance and cooling liquid outlet.
Aforementioned cooling passage is the bosh that annular arranges.
Preferably, the front end of aforementioned body is also provided with an end cap, leaves gap to form labyrinth seal between described end cap and front locking nut.
Preferably, aforementioned front permanent magnet assembly and rear permanent magnet assembly are made by strong magnetic permanent magnet, make by austenitic stainless steel material with front-end bearing pedestal, rear bearing block, armature spindle core, spacer, front locking nut, rear locking nut, end cap that front permanent magnet assembly or rear permanent magnet assembly contact.
Usefulness of the present invention is: the present invention is the principle of utilizing permanent magnet homopolar-repulsion, make the armature spindle core of electric main shaft be suspended in center, owing to being non-contact type structure, fortune motive friction-free, so can reach the rotating speed higher than traditional bearings such as ball bearings, also can as gas bearing, not expend mass energy, energy-saving effect is obvious simultaneously; Adaptive capacity to environment is stronger, can be adapted to severe environment for use, adopts cooling fluid to carry out effective cooling to main shaft, guarantees the useful life under high rotating speed; Do not adopt any special material, cost is low, can be arranged on lathe and carry out part processing at a high speed, also can be widely used in the High-speed machining of the milling of metal carving, glass grinding, timber processing and other material, and efficiency is high, and the life-span is long.
Brief description of the drawings
Fig. 1 is a kind of cross-sectional view that permanent magnet replaces a preferred embodiment of the high-speed electric main shaft of bearing of applying of the present invention;
Fig. 2 is side structure schematic diagram embodiment illustrated in fig. 1;
Fig. 3 is the local structure for amplifying schematic diagram at A place in Fig. 1.
The implication of Reference numeral in figure: 1, body, 2, stator, 3, armature spindle core, 4a, front permanent magnet assembly, 4b, rear permanent magnet assembly, 401, annular magnet inner ring, 402, annular magnet outer ring, 403, front spacer, 404, rear spacer, 5, front locking nut, 6, rear locking nut, 7, front-end bearing pedestal, 8, rear bearing block, 9, Connection Block, 901, power connection, 902, cooling fluid entrance, 903, cooling liquid outlet, 10, end cap, 11, cooling passage.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is done to concrete introduction.
Referring to Fig. 1, a kind of high-speed electric main shaft that permanent magnet replaces bearing of applying of the present invention, comprise body 1, body 1 inside is provided with stator 2, armature spindle core 3, and armature spindle core 3 forms axle system together with the front permanent magnet assembly 4a and the rear permanent magnet assembly 4b that are installed on its two ends.Front permanent magnet assembly 4a and rear permanent magnet assembly 4b are fixed by front locking nut 5 and rear locking nut 6 respectively, respectively the front-end and back-end of armature spindle core 3 are played a supportive role, the same with traditional bearing, both are installed on respectively on front-end bearing pedestal 7 and rear bearing block 8, in addition, in the rear end of body 1, a connecting seat 9 is installed, on Connection Block 9, is fixed a power connection 901, peripheral driver is powered to stator 2 by power connection 901, and driving main shaft is rotated.
Particularly, as shown in Figure 3, front permanent magnet assembly 4a and rear permanent magnet assembly 4b include: two pairs of annular magnet Internal and external cycles and be arranged at spacer (comprising front spacer 403 and rear spacer 404) between the two.Annular magnet Internal and external cycle comprises: be set in annular magnet inner ring 401 on armature spindle core 3, be installed on the annular magnet outer ring 402 on bearing pedestal, so, annular magnet inner ring 401 be just assembled together with annular magnet outer ring 402 (both do not have actual being connected or contact), one side adjacent one another are is inclined-plane and is like pole, homopolar-repulsion, can produce and be equivalent to the force way that angular contact bearing is the same, radially with axially can play a supportive role.Further, as shown in Figure 3, the incline direction on the inclined-plane of adjacent two pairs of annular magnet Internal and external cycles is contrary, and centre separates with spacer, can produce and be equivalent to the same effect of angular contact bearing DB pairing, bearing radial force and axial force simultaneously.Due to the gap between annular magnet inner ring 401 and annular magnet outer ring 402, to compare hydrostatic bearing large, noncontact running, so need not use grease lubrication to there is certain ability of bearing foreign matter simultaneously, can relatively under rugged environment, work, and can obtain the higher speed of mainshaft.
As a kind of embodiment, as Fig. 3, the interior ring of annular magnet inner ring 401 is that the S utmost point, outer shroud are the N utmost points, and the interior ring of annular magnet outer ring 402 is that the N utmost point, outer shroud are the S utmost points, and two adjacent faces are all the N utmost points; Certainly, two adjacent faces can be also all the S utmost points, do not repeat herein.Preferably, front permanent magnet assembly 4a and rear permanent magnet assembly 4b make by strong magnetic permanent magnet, the parts such as the front-end bearing pedestal 7 that contacts with front permanent magnet assembly 4a or rear permanent magnet assembly 4b, rear bearing block 8, armature spindle core 3, spacer, front locking nut 5, rear locking nut 6, end cap 10 are made by austenitic stainless steel material, prevent from being magnetized.
In the time that main shaft is worked, motor inevitably can produce heat, and heat can make armature spindle core 3 be subject to thermal stretching, there is the trend stretching backward the rear end of armature spindle core 3, so, in order to comply with this characteristic of armature spindle core 3, rear permanent magnet assembly 4b is installed on rear bearing block 8, rear bearing block 8 is contained in body 1 inside and can slides axially with respect to body 1, be not adopt screw to be fixedly connected with between rear bearing block 8 and body 1, after armature spindle core 3 is heated, rear bearing block 8 has mobile backward space, this space just in time can " neutralize " elongation that armature spindle core 3 causes owing to being heated, prevent the gap off-target gap state extending between the permanent magnet Internal and external cycle causing due to armature spindle core 3, stability while ensureing main shaft work.
In order to ensure the thermal stability of main shaft in the time running up, as depicted in figs. 1 and 2, on Connection Block 9, be provided with cooling fluid entrance 902 and cooling liquid outlet 903, be formed with at Connection Block 9 and body 1 inside the cooling passage 11 being connected with cooling fluid entrance 902 and cooling liquid outlet 903 simultaneously, it is position that cooling passage 11 runs through whole axle, is preferably the bosh that annular arranges.Cooling fluid preferred water or low viscous oil, enter cooling passage 11 from cooling fluid entrance 902, after body 1 inside is to associated components circulating cooling, flow out main shaft from cooling liquid outlet 903, while completing machine operation, the exchange of the heat that produces, plays good cooling effect.
Further, in order effectively to stop foreign matter to enter main shaft inside, guarantee the stability of main shaft performance, also be provided with an end cap 10 at the front end of body 1, between end cap 10 and front locking nut 5, leave gap to form labyrinth seal, as shown in Figure 3, the gap between end cap 10 and front locking nut 5 is meander configuration, i.e. labyrinth seal.
More than show and described general principle of the present invention, principal character and advantage.The technical staff of the industry should understand, and above-described embodiment does not limit the present invention in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in protection scope of the present invention.
Claims (7)
1. apply the high-speed electric main shaft that permanent magnet replaces bearing for one kind, comprise body, be installed on stator and the armature spindle core of internal body, it is characterized in that, also comprise the front permanent magnet assembly being fixed by front locking nut and rear locking nut respectively and the rear permanent magnet assembly that are installed on armature spindle core two ends, a connecting seat is installed in the rear end of described body, fixes a power connection on Connection Block;
Described front permanent magnet assembly and rear permanent magnet assembly include: two pairs of annular magnet Internal and external cycles and be arranged at spacer between the two, described annular magnet Internal and external cycle comprises: be set in annular magnet inner ring on armature spindle core, be installed on the annular magnet outer ring on bearing pedestal, annular magnet inner ring and annular magnet outer ring one side adjacent one another are is inclined-plane and is like pole, and the incline direction on the inclined-plane of adjacent two pairs of annular magnet Internal and external cycles is contrary.
2. a kind of high-speed electric main shaft that permanent magnet replaces bearing of applying according to claim 1, it is characterized in that, the interior ring of described annular magnet inner ring is that the S utmost point, outer shroud are the N utmost points, and the interior ring of described annular magnet outer ring is that the N utmost point, outer shroud are the S utmost points, and two adjacent faces are all the N utmost points.
3. a kind of high-speed electric main shaft that permanent magnet replaces bearing of applying according to claim 1, is characterized in that, described rear permanent magnet assembly is installed on rear bearing block, and described rear bearing block is contained in internal body and can slides axially with respect to body.
4. according to a kind of high-speed electric main shaft of applying permanent magnet replacement bearing described in claim 1-3 any one, it is characterized in that, described Connection Block is provided with cooling fluid entrance and cooling liquid outlet, and described Connection Block and internal body are formed with the cooling passage being connected with cooling fluid entrance and cooling liquid outlet.
5. a kind of high-speed electric main shaft that permanent magnet replaces bearing of applying according to claim 4, is characterized in that, described cooling passage is the bosh that annular arranges.
6. a kind of high-speed electric main shaft that permanent magnet replaces bearing of applying according to claim 4, is characterized in that, the front end of described body is also provided with an end cap, leaves gap to form labyrinth seal between described end cap and front locking nut.
7. a kind of high-speed electric main shaft that permanent magnet replaces bearing of applying according to claim 6, it is characterized in that, described front permanent magnet assembly and rear permanent magnet assembly are made by strong magnetic permanent magnet, make by austenitic stainless steel material with front-end bearing pedestal, rear bearing block, armature spindle core, spacer, front locking nut, rear locking nut, end cap that front permanent magnet assembly or rear permanent magnet assembly contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410203807.5A CN103956847A (en) | 2014-05-15 | 2014-05-15 | High-speed motorized spindle using permanent magnets instead of bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410203807.5A CN103956847A (en) | 2014-05-15 | 2014-05-15 | High-speed motorized spindle using permanent magnets instead of bearings |
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| Publication Number | Publication Date |
|---|---|
| CN103956847A true CN103956847A (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410203807.5A Pending CN103956847A (en) | 2014-05-15 | 2014-05-15 | High-speed motorized spindle using permanent magnets instead of bearings |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110928A (en) * | 2018-01-25 | 2018-06-01 | 博远机电（嘉兴）有限公司 | High pressure ultrahigh speed permanent magnet synchronous motor |
| CN110219895A (en) * | 2019-06-28 | 2019-09-10 | 倪俊极 | A kind of bearing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05146109A (en) * | 1991-10-18 | 1993-06-11 | Mitsubishi Materials Corp | Magnetic bearing and motor |
| CN2765373Y (en) * | 2005-01-13 | 2006-03-15 | 南京师范大学 | Combined bearing magnetic suspension motor / electric main shaft |
| CN2822010Y (en) * | 2005-08-11 | 2006-09-27 | 李新连 | High speed motor cooling structure |
| US20090015081A1 (en) * | 2007-07-13 | 2009-01-15 | Aisin Aw Co., Ltd. | Cooling structure and cooling method of rotating electrical machine |
| CN101478190A (en) * | 2008-12-30 | 2009-07-08 | 洛阳轴研科技股份有限公司 | Air sealing construct design for electric main shaft of oil grease mill |
| CN101710754A (en) * | 2009-11-27 | 2010-05-19 | 江苏华雕机械有限公司 | Electric main shaft lubricated by water or water fog |
-
2014
- 2014-05-15 CN CN201410203807.5A patent/CN103956847A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05146109A (en) * | 1991-10-18 | 1993-06-11 | Mitsubishi Materials Corp | Magnetic bearing and motor |
| CN2765373Y (en) * | 2005-01-13 | 2006-03-15 | 南京师范大学 | Combined bearing magnetic suspension motor / electric main shaft |
| CN2822010Y (en) * | 2005-08-11 | 2006-09-27 | 李新连 | High speed motor cooling structure |
| US20090015081A1 (en) * | 2007-07-13 | 2009-01-15 | Aisin Aw Co., Ltd. | Cooling structure and cooling method of rotating electrical machine |
| CN101478190A (en) * | 2008-12-30 | 2009-07-08 | 洛阳轴研科技股份有限公司 | Air sealing construct design for electric main shaft of oil grease mill |
| CN101710754A (en) * | 2009-11-27 | 2010-05-19 | 江苏华雕机械有限公司 | Electric main shaft lubricated by water or water fog |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110928A (en) * | 2018-01-25 | 2018-06-01 | 博远机电（嘉兴）有限公司 | High pressure ultrahigh speed permanent magnet synchronous motor |
| CN108110928B (en) * | 2018-01-25 | 2024-02-09 | 博远机电（嘉兴）有限公司 | High-voltage ultra-high-speed permanent magnet synchronous motor |
| CN110219895A (en) * | 2019-06-28 | 2019-09-10 | 倪俊极 | A kind of bearing |
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Application publication date: 20140730 |