CN202270984U - Motorized spindle for preload permanent magnetic bearing supports - Google Patents
Motorized spindle for preload permanent magnetic bearing supports Download PDFInfo
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- CN202270984U CN202270984U CN2011203934772U CN201120393477U CN202270984U CN 202270984 U CN202270984 U CN 202270984U CN 2011203934772 U CN2011203934772 U CN 2011203934772U CN 201120393477 U CN201120393477 U CN 201120393477U CN 202270984 U CN202270984 U CN 202270984U
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- permanent
- magnetic clamp
- magnetic
- ring
- permanent magnetic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model relates to a motorized spindle for preload permanent magnetic bearing supports. The motorized spindle comprises a casing, an end cover, a spindle, a variable-frequency motor stator, a cooling device, a motor rotor and preload permanent magnetic bearings, wherein each preload permanent magnetic bearing comprises an outer ring, an inner ring, a side ring, a static permanent magnetic ring group, a magnetic conduction sheet, a movable permanent magnetic ring group, a ceramic ball assembly and a setscrew; the static permanent magnetic ring group comprises axial magnetizing semicircular neodymium iron boron permanent magnetic rings; the directions of magnetization of adjacent semicircular neodymium iron boron permanent magnetic rings are opposite; and the movable permanent magnetic ring group comprises an integrated axial magnetizing semicircular neodymium iron boron permanent magnetic ring; and the ceramic ball assembly comprises a ceramic ball and a housing washer. The motorized spindle achieves the preload of the bearings through applying the permanent magnetic rings with opposite directions of magnetization, offsets the dead weight, achieves the static suspension, and has the characterized of good centering property, stable performance, unitized design and convenience in use.
Description
Technical field
The utility model relates to a kind of electric main shaft that preloads the Permanent-magnet bearing supporting, particularly a kind of variable-frequency motor machine tool chief axis that preloads the supporting of radial permanent magnet bearing.
Background technology
Preloading permanent-magnet suspension bearing is to utilize the active force between the permanent magnet to realize levitated object stablizing on the part free degree.Compare with active magnetic suspension bearing, the passive-type magnetic suspension bearing need not initiatively electronic control system, has not only saved power consumption, and more important is the control system unit that has reduced the complicacy that possibly lose efficacy, and makes system more reliable, longer service life.Permanent-magnet bearing can combine with electromagnetic bearing, mechanical bearing, air bearing and superconducting magnetic bearing etc., constitutes various forms of magnetic levitation bearing systems, has broad application prospects.
For permanent-magnet suspension bearing is applied in the machine tool chief axis, the author had once invented the patent (patent No.: ZL 200820055840.8) of permanent magnet suspension electricity main shaft in one's early years and had applied it in the industry.Practical experience through for many years and technological improvement constantly, the author proposed at present a kind of more reliable, stablize and bearing capacity bigger preload the radial permanent magnet electric main shaft that suspends.
The utility model content
The purpose of the utility model is to provide a kind of electric main shaft that preloads the Permanent-magnet bearing supporting; It has high limit speed, minimum friction, the life-span of growing and bigger working range, and has advantages such as simple in structure, that cost is low, need not to lubricate, pollution-free.
In order to achieve the above object, the design of the utility model is:
The electric main shaft that preloads the supporting of radial permanent magnet bearing of the present invention comprises housing, end cap, main shaft, variable-frequency motor stator, cooling device, rotor and preloads Permanent-magnet bearing.Described quiet permanent-magnetic clamp group is made up of the semicircle Nd-Fe-B permanent magnetic ring of one group of (four) axial charging, and the direction of magnetization of adjacent semicircle magnet ring is opposite.Described moving permanent-magnetic clamp group is made up of the Nd-Fe-B permanent magnetic ring of one group (one or two) complete axial charging.Produce preloading of making progress between the said dynamic and static permanent-magnetic clamp group,, can make main shaft be suspended in the Permanent-magnet bearing center to offset the main shaft deadweight.
According to above-mentioned utility model design, the utility model adopts following technical proposals:
A kind of electric main shaft that preloads the supporting of radial permanent magnet bearing; Comprise housing, end cap, main shaft, variable-frequency motor stator, cooling device, rotor and preload Permanent-magnet bearing; It is characterized in that described rotor is installed in the middle part of main shaft; The two ends of main shaft preload the permanent-magnet suspension bearing supporting by two; Two preload the both sides that permanent-magnet suspension bearing is installed in enclosure interior, and the two ends of housing connect two end caps respectively through soket head cap screw, make whole electric main shaft connect as a whole.
The described Permanent-magnet bearing that preloads is made up of outer stationary ring, interior rotating ring, side stationary ring, middle stationary ring, quiet permanent-magnetic clamp group, magnetic conduction sheet, moving permanent-magnetic clamp group, hold-down screw, Ceramic Balls assembly, and two side stationary rings are fixed in the both sides of outer stationary ring respectively through hold-down screw; Two or three quiet permanent-magnetic clamp group outsourcing magnetic conduction sheets are embedded in respectively in the annular groove of two side stationary rings or middle stationary ring; Moving permanent-magnetic clamp group outsourcing magnetic conduction sheet is embedded in the annular groove of interior rotating ring, and is between the adjacent quiet permanent-magnetic clamp group.Magnetic conduction sheet is made up of the very high material of magnetic conductivity (for example soft iron, silicon steel sheet etc.); Make the magnetic line of force distribution comparison rule of dynamic and static permanent-magnetic clamp; Increase with permanent-magnetic clamp magnetic force under the volume; Also realized simultaneously the magnetic screen that whole permanent-magnet suspension bearing is outside, reduced the influence of external magnetic field, increased the stability in magnetic field Permanent-magnet bearing.Described moving permanent-magnetic clamp group and quiet permanent-magnetic clamp group constitute by the Nd-Fe-B permanent magnetic ring of axial charging.Described quiet permanent-magnetic clamp group is formed two circular permanent-magnetic clamps that are nested of size by two involutory up and down large semi-circular permanent-magnetic clamps and two circular permanent-magnetic clamps of involutory up and down smaller part; The equal axial charging of described semicircle permanent-magnetic clamp; The adjacent permanent-magnetic clamp direction of magnetization is opposite; Promptly two large semi-circular permanent-magnetic clamp direction of magnetizations are opposite; Two circular permanent-magnetic clamp direction of magnetizations of smaller part are opposite, and the circular permanent-magnetic clamp direction of magnetization of last large semi-circular permanent-magnetic clamp and last smaller part is opposite, and following large semi-circular permanent-magnetic clamp is opposite with the circular permanent-magnetic clamp direction of magnetization of following smaller part; The permanent-magnetic clamp axial magnetized direction of same orientation is identical in eight semicircle permanent-magnetic clamps in said adjacent two quiet permanent-magnetic clamp groups.Described moving permanent-magnetic clamp group is made up of the Nd-Fe-B permanent magnetic ring of a complete axial charging; Last large semi-circular permanent-magnetic clamp in its axial magnetized direction and said adjacent two the quiet permanent-magnetic clamp groups is identical with the direction of magnetization of the circular permanent-magnetic clamp of following smaller part, and opposite with the direction of magnetization of following large semi-circular permanent-magnetic clamp and last smaller part circle permanent-magnetic clamp in said adjacent two quiet permanent-magnetic clamp groups.Quiet permanent-magnetic clamp group be fixed in the side ring with outer shroud in.On the ring, ring and moving permanent-magnetic clamp group were rotated together in main shaft drove in moving permanent-magnetic clamp group was fixed on.
Said Ceramic Balls assembly is made up of Ceramic Balls and seat ring, the one side of Ceramic Balls and the plane contact of interior rotating ring, and another side contacts with the raceway of seat ring, and seat ring is embedded in the side stationary ring, and the material of Ceramic Balls and seat ring is the silicon nitride self-lubricating material.The effect of Ceramic Balls assembly is that each moving magnet ring of location equates with the distance of magnetostatic interannular; Keep the suction or the repulsion balance on both sides to equate, and himself suffered power is very little, therefore; Its frictional force or moment of friction are minimum, make that the frictional force of whole Permanent-magnet bearing or moment of friction are minimum.
Between described variable-frequency motor stator and the housing cooling device is arranged, connect extraneous cooling water pipe.
Through above-mentioned improvement, the utility model design as compared with the past has following substantive distinguishing features and advantage:
(1) permanent-magnetic clamp that the application direction of magnetization of novelty is opposite is realized preloading of bearing, electric main shaft deadweight is offset, and greatly increased the bearing capacity and the rigidity of Permanent-magnet bearing;
(2) replaced traditional mechanical bearing with the minimum Ceramic Balls self lubricating system of frictional force, avoided the interference of magnetic, rotated more flexible;
(3) increased loaded area, stability is high, and is good to neutrality, electric main shaft stable performance;
(4) blocking design, easy to use, be convenient to large-scale application and producing in serial form, have very big market prospects.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model;
Fig. 2 is the front view after quiet permanent-magnetic clamp group displacement of the utility model;
Fig. 3 is the side view after quiet permanent-magnetic clamp group displacement of the utility model;
Fig. 4 is the side view of a moving permanent-magnetic clamp group of the utility model;
Fig. 5 is the utility model principle key diagram.
The specific embodiment
The preferred embodiment accompanying drawings of the utility model is following:
Embodiment one:
Referring to Fig. 1; Originally preload the electric main shaft of Permanent-magnet bearing supporting; Comprise housing (1), end cap (2), main shaft (6), variable-frequency motor stator (12), cooling device (13), rotor (14) and preload Permanent-magnet bearing; It is characterized in that described rotor (14) is installed in the middle part of main shaft (6), the two ends of main shaft (6) preload the permanent-magnet suspension bearing supporting by two, and two preload permanent-magnet suspension bearing and are installed in the inner both sides of housing (1); The two ends of housing (1) connect two end caps (2) respectively by 12 or 16 soket head cap screws (15), make whole electric main shaft connect as a whole by soket head cap screw (15).
Embodiment two:
Present embodiment and embodiment one are basic identical, and special feature is following:
The described Permanent-magnet bearing that preloads is made up of outer stationary ring (3), interior rotating ring (9), side stationary ring (17), middle stationary ring (18), quiet permanent-magnetic clamp group (4), magnetic conduction sheet (5), moving permanent-magnetic clamp group (10), hold-down screw (11), Ceramic Balls assembly (16), and two side rings (17) are fixed in the both sides of outer stationary ring (3) respectively through hold-down screw (11); Two or three quiet permanent-magnetic clamp groups (4) outsourcing magnetic conduction sheets (5) are embedded in respectively in the annular groove of two side stationary rings (17) or middle stationary ring (18); Moving permanent-magnetic clamp group (10) outsourcing magnetic conduction sheet (5) is embedded in the annular groove of interior rotating ring (9), and is between the adjacent quiet permanent-magnetic clamp group (4).Magnetic conduction sheet (5) is made up of the very high material of magnetic conductivity (for example soft iron, silicon steel sheet etc.); Make the magnetic line of force distribution comparison rule of dynamic and static permanent-magnetic clamp; Increase with permanent-magnetic clamp magnetic force under the volume; Also realized simultaneously the magnetic screen that whole permanent-magnet suspension bearing is outside, reduced the influence of external magnetic field, increased the stability in magnetic field Permanent-magnet bearing.Described moving permanent-magnetic clamp group (10) and quiet permanent-magnetic clamp group (4) constitute by the Nd-Fe-B permanent magnetic ring of axial charging.
Described quiet permanent-magnetic clamp group (4) is formed two circular permanent-magnetic clamps that are nested of size by two involutory up and down large semi-circular permanent-magnetic clamp A, B and two the circular permanent-magnetic clamp C of involutory up and down smaller part, D; Described semicircle permanent-magnetic clamp A, B, C, the equal axial charging of D; The adjacent permanent-magnetic clamp direction of magnetization is opposite; Promptly two large semi-circular permanent-magnetic clamp A, the B direction of magnetization are opposite; The circular permanent-magnetic clamp C of two smaller part, the D direction of magnetization are opposite, and last large semi-circular permanent-magnetic clamp A is opposite with the circular permanent-magnetic clamp C of the last smaller part direction of magnetization, and following large semi-circular permanent-magnetic clamp B is opposite with the following smaller part circle permanent-magnetic clamp D direction of magnetization; The permanent-magnetic clamp axial magnetized direction of same orientation is identical in eight semicircle permanent-magnetic clamps in said adjacent two quiet permanent-magnetic clamp groups (4).Described moving permanent-magnetic clamp group (10) is made up of the Nd-Fe-B permanent magnetic ring of a complete axial charging; Last large semi-circular permanent-magnetic clamp A in its axial magnetized direction and said adjacent two the quiet permanent-magnetic clamp groups (4) is identical with the direction of magnetization of the circular permanent-magnetic clamp D of following smaller part, and opposite with the direction of magnetization of following large semi-circular permanent-magnetic clamp B and last smaller part circle permanent-magnetic clamp C in said adjacent two quiet permanent-magnetic clamp groups (4).Quiet permanent-magnetic clamp group (4) be fixed in the side stationary ring (17) with outer stationary ring (3) in.Moving permanent-magnetic clamp group (10) is fixed on the interior rotating ring (9), and rotating ring (9) and moving permanent-magnetic clamp group (10) were rotated together in main shaft drove.Said Ceramic Balls assembly (16); Form by Ceramic Balls (7) and seat ring (8); One side of Ceramic Balls (7) contacts with the raceway of seat ring (8) with the plane contact of interior rotating ring (9), another side, and seat ring (8) is embedded in the side stationary ring (17); The material of Ceramic Balls (7) and seat ring (8) is the silicon nitride self-lubricating material, and moment of friction is minimum.Moving permanent-magnetic clamp group is identical with the gap between the quiet permanent-magnetic clamp group and invariable by Ceramic Balls assembly (16) maintenance.
Between described variable-frequency motor stator (12) and the housing (1) cooling device (13) is arranged, connect extraneous cooling water pipe.
Fig. 2 is a front view after the quiet permanent-magnetic clamp group displacement, and Fig. 3 is a side view after the quiet permanent-magnetic clamp group displacement.A quiet permanent-magnetic clamp group (4) is made up of the Nd-Fe-B permanent magnetic ring (A, B, C, D) that is nested in four semicircle axial chargings in the side stationary ring (17).Wherein half permanent-magnetic clamp (A), (D) direction of magnetization are identical, and half permanent-magnetic clamp (B), (C) direction of magnetization are identical, and half permanent-magnetic clamp (A), (D) and half permanent-magnetic clamp (B), (C) direction of magnetization are opposite.The Nd-Fe-B permanent magnetic ring of four semicircle axial chargings of a said quiet permanent-magnetic clamp group (4) is bonded in the side ring (17) by super glue.
Fig. 4 is the side view of a moving permanent-magnetic clamp group, and moving permanent-magnetic clamp group is made up of the Nd-Fe-B permanent magnetic ring of a complete axial charging, is fixed on the interior ring (9).
Fig. 5 is the principle key diagram of the utility model.A quiet permanent-magnetic clamp group (4) comprises Nd-Fe-B permanent magnetic ring (A), (B), (C), (D) of four semicircle axial chargings.Wherein, the direction of magnetization of half permanent-magnetic clamp (A), (D) is identical with the direction of magnetization of moving permanent-magnetic clamp group (10), and the direction of magnetization of half permanent-magnetic clamp (B), (C) direction of magnetization and moving permanent-magnetic clamp group (10) is opposite.Like this, half permanent-magnetic clamp (A), (D) have the attraction that radially makes progress to moving permanent-magnetic clamp group (10), and half permanent-magnetic clamp (B), (C) have the repulsive force that radially makes progress to moving permanent-magnetic clamp group (10).Through force resolution, axially making a concerted effort is zero, explain axially to be in poised state, and the footpath make progress on oriented with joint efforts, produce a preload.The value that preloads approximates the weight of main shaft self, and thus, the load of main shaft self is cancelled, and main shaft is in Permanent-magnet bearing center, the minimum permanent magnet suspension state of frictional force.
The interior rotating ring (9) that links to each other with main shaft has certain up and down amount, and to guarantee the carrying scope, amount of movement is designed by gross data and experiment.When radial impact occurring, quiet permanent-magnetic clamp group (4) draws one to push away to moving permanent-magnetic clamp group (10), forces moving permanent-magnetic clamp to return to original position, keeps main shaft to be in Permanent-magnet bearing center, the minimum permanent magnet suspension state of frictional force.
Claims (5)
1. one kind preloads the electric main shaft that Permanent-magnet bearing supports; Comprise housing (1), end cap (2), main shaft (6), variable-frequency motor stator (12), cooling device (13), rotor (14) and preload Permanent-magnet bearing; It is characterized in that described rotor (14) is installed in the middle part of main shaft (6); The two ends of main shaft (6) preload the permanent-magnet suspension bearing supporting by two; Two preload the both sides that permanent-magnet suspension bearing is installed in housing (1) inside, and the two ends of housing (1) make whole electric main shaft connect as a whole by connecting two end caps (2) respectively through soket head cap screw (15).
2. the electric main shaft that preloads the Permanent-magnet bearing supporting according to claim 1; It is characterized in that the described Permanent-magnet bearing that preloads is made up of outer stationary ring (3), interior rotating ring (9), side stationary ring (17), middle stationary ring (18), quiet permanent-magnetic clamp group (4), magnetic conduction sheet (5), moving permanent-magnetic clamp group (10), hold-down screw (11), Ceramic Balls assembly (16), two side stationary rings (17) are fixed in the both sides of outer stationary ring (3) respectively through hold-down screw (11); Two or three quiet permanent-magnetic clamp groups (4) outsourcing magnetic conduction sheets (5) are embedded in respectively in the annular groove of two side stationary rings (17) or middle stationary ring (18); Moving permanent-magnetic clamp group (10) outsourcing magnetic conduction sheet (5) is embedded in the annular groove of interior rotating ring (9), and is between the adjacent quiet permanent-magnetic clamp group (4); Magnetic conduction sheet (5) is made up of the very high material of magnetic conductivity; Described moving permanent-magnetic clamp group (10) and quiet permanent-magnetic clamp group (4) constitute by the Nd-Fe-B permanent magnetic ring of axial charging.
3. the electric main shaft that preloads the Permanent-magnet bearing supporting according to claim 2; It is characterized in that described quiet permanent-magnetic clamp group (4) forms big or small two circular permanent-magnetic clamps that are nested by two involutory up and down large semi-circular permanent-magnetic clamp A, B and two the circular permanent-magnetic clamp C of involutory up and down smaller part, D; Described semicircle permanent-magnetic clamp A, B, C, the equal axial charging of D; The adjacent permanent-magnetic clamp direction of magnetization is opposite; Promptly two large semi-circular permanent-magnetic clamp A, the B direction of magnetization are opposite; The circular permanent-magnetic clamp C of two smaller part, the D direction of magnetization are opposite, and last large semi-circular permanent-magnetic clamp (A) is opposite with the circular permanent-magnetic clamp C of the last smaller part direction of magnetization, and following large semi-circular permanent-magnetic clamp B is opposite with the following smaller part circle permanent-magnetic clamp D direction of magnetization; The permanent-magnetic clamp axial magnetized direction of same orientation is identical in eight semicircle permanent-magnetic clamps in said adjacent two quiet permanent-magnetic clamp groups (4); Described moving permanent-magnetic clamp group (10) is made up of the Nd-Fe-B permanent magnetic ring of a complete axial charging; Last large semi-circular permanent-magnetic clamp A in its axial magnetized direction and said adjacent two the quiet permanent-magnetic clamp groups (4) is identical with the direction of magnetization of the circular permanent-magnetic clamp D of following smaller part, and opposite with the direction of magnetization of following large semi-circular permanent-magnetic clamp B and last smaller part circle permanent-magnetic clamp C in said adjacent two quiet permanent-magnetic clamp groups (4).
4. the electric main shaft that preloads the Permanent-magnet bearing supporting according to claim 2; It is characterized in that said Ceramic Balls assembly (16); Be made up of Ceramic Balls (7) and seat ring (8), one side of Ceramic Balls (7) contacts with the raceway of seat ring (8) with the plane contact of interior rotating ring (9), another side; Seat ring (8) is embedded in the side stationary ring (17), and the material of Ceramic Balls (7) and seat ring (8) is the silicon nitride self-lubricating material.
5. according to claim 1 or 2 or the 3 or 4 described electric main shafts that preload the permanent-magnet suspension bearing supporting, it is characterized in that between described variable-frequency motor stator (12) and the housing (1) cooling device (13) being arranged, connect extraneous cooling water pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203934772U CN202270984U (en) | 2011-10-17 | 2011-10-17 | Motorized spindle for preload permanent magnetic bearing supports |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203934772U CN202270984U (en) | 2011-10-17 | 2011-10-17 | Motorized spindle for preload permanent magnetic bearing supports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202270984U true CN202270984U (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203934772U Expired - Fee Related CN202270984U (en) | 2011-10-17 | 2011-10-17 | Motorized spindle for preload permanent magnetic bearing supports |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202270984U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107405757A (en) * | 2015-03-04 | 2017-11-28 | 费斯托股份有限两合公司 | The application of apparatus for fastening and apparatus for fastening |
| CN109489964A (en) * | 2018-12-26 | 2019-03-19 | 吉林大学 | Based on to the electro spindle reliability test bench automatic centring device for dragging load |
-
2011
- 2011-10-17 CN CN2011203934772U patent/CN202270984U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107405757A (en) * | 2015-03-04 | 2017-11-28 | 费斯托股份有限两合公司 | The application of apparatus for fastening and apparatus for fastening |
| CN109489964A (en) * | 2018-12-26 | 2019-03-19 | 吉林大学 | Based on to the electro spindle reliability test bench automatic centring device for dragging load |
| CN109489964B (en) * | 2018-12-26 | 2021-06-01 | 吉林大学 | Automatic centering device of electric spindle reliability test bed based on twin-drag loading |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20121017 |