CN204258476U - A kind of rotor structure for permanent magnet motor - Google Patents
A kind of rotor structure for permanent magnet motor Download PDFInfo
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- CN204258476U CN204258476U CN201420770895.2U CN201420770895U CN204258476U CN 204258476 U CN204258476 U CN 204258476U CN 201420770895 U CN201420770895 U CN 201420770895U CN 204258476 U CN204258476 U CN 204258476U
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Abstract
The utility model discloses a kind of rotor structure for permanent magnet motor, belong to magneto technical field.The baseplane of each bulk-breaking of pole core axially has elongated dovetail groove along rotating shaft, elongated dovetail groove comprises eck part and dovetail, the outer surface of yoke sleeve has the dovetail boss that elongated dovetail groove that bulk-breaking each with pole core offer matches, and the A/F of the eck part of elongated dovetail groove is 1/3 ~ 1/2 with the ratio of bulk-breaking baseplane width.Pole core after being in place with yoke sleeve described each dovetail boss be positioned at the inside of the elongated dovetail groove matched and be processed with connecting hole system, by the position of screw fastening pole core and yoke sleeve.This arrangement enhances the positioning precision of pole core and yoke sleeve, position stability, reliability, dovetail groove position is fitted tightly, and integrally-built bonding strength, bearing capacity comparatively traditional structure significantly strengthen.Reduce manufacturing cost and part processing, check difficulty, be beneficial to mass production.
Description
Technical field
The utility model relates to a kind of permanent magnet motor pole core structure, belongs to magneto technical field.
Background technology
Pole core belongs to the vitals of permanent magnet machine rotor, as the installation carrier of permanent magnet, is ensureing, under magnetic effect and the suitable prerequisite of cross, straight axle reactance ratio, have enough mechanical strengths.Traditional pole core structure is primarily of the part such as iron core, sleeve composition, and iron core and sleeve are connected and fixed by the mode such as screw, special-shaped pin, and its composition surface is arc surface.This kind of structure positioning precision is poor, mechanical strength is low, be difficult to stablize when dynamic balance test of rotor on the one hand, distortion (causing pin to loosen when such as rotating makes iron core produce centrifugal deformation) is easily produced in running on the other hand, cause non-uniform gap to change, affect electric property, air gap time serious, can be caused to reduce, temperature rise improves, and even complete machine burns.
Summary of the invention
The purpose of this utility model is to solve the problem that existing pole core structure positioning precision is poor, mechanical strength is low, there is provided a kind of permanent magnet motor pole core structure, this pole core structure improves the assembly precision of iron core and sleeve two parts in permanent magnet machine rotor parts and improves the connection mechanical strength of iron core and sleeve.
The purpose of this utility model is achieved through the following technical solutions:
A kind of rotor structure for permanent magnet motor, comprise: pole core and yoke sleeve, wherein pole core comprises the identical bulk-breaking of multiple structure, each bulk-breaking angularly compartment of terrain is arranged on the outer surface one week of yoke sleeve, and the exterior arc surface of each bulk-breaking of pole core is provided with along the axially grooved magnet isolation tank of rotating shaft and copper sheet mounting groove; Form magnet steel mounting groove between two adjacent pole core bulk-breakings, each magnet steel mounting groove top is offered elongated dove-tail and is become slot wedge mounting groove;
Described each bulk-breaking has exterior arc surface and baseplane, and for each cross section axially vertical with rotating shaft, each bulk-breaking of pole core has sector crosssection; The exterior arc surface of each bulk-breaking has the eccentric throw of predetermined amount relative to the centre of gyration of pole core; The baseplane of each bulk-breaking and the exterior surface of yoke sleeve, axially elongated dovetail groove is had along rotating shaft in the baseplane of each bulk-breaking, elongated dovetail groove comprises eck part and dovetail, the bottom of the dovetail of elongated dovetail groove is also axially arranged with multiple screw hole along rotating shaft, and each screw hole is all arranged along rotating shaft radial direction; Further, for each cross section axially vertical with rotating shaft, the A/F of the eck part of described elongated dovetail groove is 1/3 ~ 1/2 with the ratio of bulk-breaking baseplane width;
The outer surface of described yoke sleeve has multiple dovetail boss at angularly interval, dovetail boss has the structure that elongated dovetail groove that bulk-breaking each with pole core offer matches, and the quantity of dovetail boss is equal with elongated dovetail groove quantity, pole core after being in place with yoke sleeve described each dovetail boss be positioned at the inside of the elongated dovetail groove matched; Each dovetail boss also offers reverse counterbore and the via hole of many group coaxial communication along rotating shaft radial direction; Reverse counterbore opening is arranged on the inside of yoke sleeve, the opening of via hole is arranged on the outer surface of yoke sleeve, screw hole bottom the elongated dovetail groove of all each with the pole core bulk-breaking of the position of reverse counterbore and via hole and quantity matches, multiple screw is installed on each and organizes reverse counterbore, via hole and screw hole inside, makes each bulk-breaking of pole core and yoke sleeve pass through screw fastening;
The elongated keyway that yoke sleeve lining is processed with along rotating shaft axis makes to realize between yoke sleeve and rotating shaft locating.
As preferably, the bottom width of elongated dovetail groove and the depth dimensions of elongated dovetail groove comparable.
As preferably, the bottom of described magnet steel mounting groove is plane.
As preferably, the degree of depth of elongated dovetail groove should ensure after alinco assembled enters pole core, does not affect the distribution of the magnetic line of force.
As preferably, for each cross section axially vertical with rotating shaft, the outer angle of the elongated dovetail groove of each bulk-breaking of pole core is greater than the outer angle of the corresponding dovetail boss of yoke sleeve outer surface, to ensure to assemble rear dovetail groove position reliable contacts.
Contrast prior art, the utility model beneficial effect is:
1, each bulk-breaking of pole core and yoke sleeve are by the elongated dovetail groove that matches and elongated dovetail boss fixed position, the structure that its positioning precision, position stability, reliability combine location compared with arc surface and special-shaped pin improves a lot, and after fastening further by screw, dovetail groove position fits tightly, and integrally-built bonding strength, bearing capacity comparatively traditional structure significantly strengthen.
2, comparatively conventional design eliminates special-shaped pin making and assembly work between pole core and yoke sleeve, the offset of the relative centre of gyration of self-assembling formation external arc after iron core bulk-breaking process and assemble, self-assembling formation magnet steel groove after assembling, without the need to carrying out eccentric processing, magnet steel slot machining after assembling, thus reduce manufacturing cost, be beneficial to mass production.
3, comparatively conventional structure, manufacturability is greatly improved.Fan-shaped bulk-breaking is divided into after conventional core roughing, part produces distortion, must carry out Inner arc finishing processing using as follow-up technological datum, the accurate measurement of the eccentric throw of the imperfect circular arc of fan-shaped bulk-breaking, outer off-centre operation cambered surface has great difficulty in practical operation.Pole core structure of the present utility model, the fan-shaped bulk-breaking of iron core and yoke sleeve adopt plane to be connected and design, and greatly reduce part processing, inspection difficulty.
Accompanying drawing explanation
Fig. 1 is the axial cutaway view of permanent magnet motor pole core;
Fig. 2 is the end view after permanent magnet motor pole core and yoke sleeve are seated;
Fig. 3 is the bulk-breaking end view of pole core;
Fig. 4 is yoke sleeve cross-sectional view;
Fig. 5 is elongated dovetail groove partial view;
Fig. 6 is permanent magnet motor pole core profile axis side view.
Wherein:
1-pole core bulk-breaking; 2-yoke sleeve; 3-screw;
The dovetail side plane of the elongated dovetail groove of 001-pole core bulk-breaking; The dovetail side plane of the dovetail boss of 002-yoke sleeve; The eck side plane of the elongated dovetail groove of 003-pole core bulk-breaking; The eck side plane of the dovetail boss of 004-yoke sleeve; The baseplane of 005-pole core bulk-breaking; The shoulder plane of 006-yoke sleeve dovetail boss;
The exterior arc surface of 101-pole core bulk-breaking; 102-slot wedge mounting groove; 103-magnet isolation tank; 104-copper sheet mounting groove; 105-pole core bulk-breaking side; The pole core bulk-breaking side that 106-is adjacent with bulk-breaking side 105; The elongated dovetail groove of 108-; The outer angle of the elongated dovetail groove of 109-pole core bulk-breaking 108;
The elongated keyway along rotating shaft axis of 201-yoke sleeve lining; 202-dovetail boss; The reverse counterbore of 203-; 204-via hole; The outer angle of 205-dovetail boss 202.
Embodiment
Below in conjunction with drawings and Examples, content of the present utility model is described further.
A kind of rotor structure for permanent magnet motor, see accompanying drawing 2, comprise: pole core and yoke sleeve (2), wherein pole core comprises the identical bulk-breaking of multiple structure (1), each bulk-breaking angularly compartment of terrain is arranged on the outer surface one week of yoke sleeve, and the exterior arc surface (101) of each bulk-breaking of pole core is provided with along the axially grooved magnet isolation tank (103) of rotating shaft and copper sheet mounting groove (104); Form magnet steel mounting groove between two adjacent pole core bulk-breakings, each magnet steel mounting groove top is offered elongated dovetail groove (102) and is formed slot wedge mounting groove.
Each bulk-breaking has exterior arc surface (101) and baseplane (005), and for each cross section axially vertical with rotating shaft, each bulk-breaking of pole core has sector crosssection; The exterior arc surface (101) of each bulk-breaking has the eccentric throw of predetermined amount relative to the centre of gyration of pole core; The baseplane (005) of each bulk-breaking and the exterior surface of yoke sleeve, axially elongated dovetail groove (108) is had along rotating shaft in the baseplane (005) of each bulk-breaking, elongated dovetail groove (108) comprises eck part and dovetail, the bottom of the dovetail of elongated dovetail groove (108) is also axially arranged with multiple screw hole along rotating shaft, and each screw hole is all arranged along rotating shaft radial direction; Further, for each cross section axially vertical with rotating shaft, the A/F of the eck part of described elongated dovetail groove (108) and the ratio of bulk-breaking baseplane (005) width are 1/3 ~ 1/2; See the bulk-breaking end view of accompanying drawing 3 pole core.
The outer surface of described yoke sleeve (2) has multiple dovetail boss (202) at angularly interval, dovetail boss (202) has the structure that elongated dovetail groove (108) that bulk-breaking each with pole core offer matches, and the quantity of dovetail boss (202) is equal with elongated dovetail groove (108) quantity, pole core after being in place with yoke sleeve described each dovetail boss (202) be positioned at the inside of the elongated dovetail groove (108) matched; End view after permanent magnet motor pole core and yoke sleeve are seated is shown in accompanying drawing 2, and permanent magnet motor pole core profile axis side view is shown in accompanying drawing 6.
Each dovetail boss (202) also offers reverse counterbore (203) and the via hole (204) of n group coaxial communication along rotating shaft radial direction; Reverse counterbore (203) opening is arranged on the inside of yoke sleeve, and the opening of via hole (204) is arranged on the outer surface of yoke sleeve, and yoke sleeve cross-sectional view is shown in accompanying drawing 4; N screw hole of elongated dovetail groove (108) bottom of all each with the pole core bulk-breaking of the position of reverse counterbore (203) and via hole (204) and quantity matches, n screw (3) is installed on each and organizes reverse counterbore (203), via hole (204) and screw hole inside, makes each bulk-breaking (1) of pole core and yoke sleeve (2) fastening by screw (3); Screw is in place and sees the axial cutaway view of accompanying drawing 1 permanent magnet motor pole core,
The elongated keyway (201) that yoke sleeve lining is processed with along rotating shaft axis makes to realize between yoke sleeve and rotating shaft locating.
As preferably, the bottom width c of elongated dovetail groove (108) and the degree of depth h size of elongated dovetail groove (108) comparable.The ratio of the two approximates 1.
As preferably, the bottom of described magnet steel mounting groove is plane.
As shown in Figure 2 and Figure 3, pole core is the cross section that a length is identical with several structures that the cylindrical rings that yoke sleeve matches is cut is fan-shaped bulk-breaking.Each fan-shaped bulk-breaking exterior arc surface (101) has a certain amount of eccentric throw relative to the centre of gyration of pole core, as shown in Figure 3, the A/F b of elongated dovetail groove eck part and the ratio of pole core bulk-breaking baseplane width a, i.e. b/a value 1/3 ~ 1/2; The ratio of the bottom width of elongated dovetail groove (108) dovetail and the depth dimensions of elongated dovetail groove (108) is between 0.5 ~ 2, and as preferably, this ratio is got and approximated 1.
As shown in Figure 4, yoke sleeve 2 is tube shape component, and outer surface angularly interval is evenly distributed with the dovetail boss (202) corresponding with iron core bulk-breaking quantity and several via hole (204), oppositely counterbore (203); Yoke sleeve lining is processed elongated keyway (201) and is realized installing with rotating shaft locating.
As accompanying drawing 1, shown in accompanying drawing 5, the dovetail side plane (001) of the elongated dovetail groove of pole core bulk-breaking contacts with the dovetail side plane (002) of the dovetail boss of yoke sleeve, the baseplane (005) of pole core bulk-breaking contacts with the shoulder plane (006) of yoke sleeve dovetail boss, each bulk-breaking and the yoke sleeve of pole core realize static determinacy position by the position relationship of these planes, eck side plane (004) matched in clearance of the eck side plane (003) of the elongated dovetail groove of pole core bulk-breaking and the dovetail boss of yoke sleeve, the each bulk-breaking of pole core and yoke sleeve are by multiple screw fastening, also can prevent from moving axially.
As shown in Figure 3, Figure 4, the outer angle (205) of the dovetail boss (202) that the outer angle (109) of the elongated dovetail groove of pole core bulk-breaking is more corresponding than yoke sleeve (2) outer surface is bigger, to ensure to assemble rear dovetail groove position reliable contacts.
An embodiment of pole core structure of the present utility model:
As shown in Figure 4, yoke sleeve is non-magnet material, and its outside wall surface is processed with elongated dovetail boss, and processing and the connecting hole system of pole core bulk-breaking, for placing screw, and the keyway needed for the inwall processing of yoke sleeve is connected with rotating shaft.
As shown in Figure 3, pole core is ferrimagnet, the cylindrical rings that its length is mated with yoke sleeve, be cut into the bulk-breaking with sector crosssection after shaping, bulk-breaking, through the fan-shaped exterior arc surface of processing, baseplane, processes elongated dovetail groove, processing connecting hole system, assembly forms pole core, and profile after assembling, as shown in Fig. 6 shaft side figure.
As shown in accompanying drawing 1, accompanying drawing 2, eccentric throw, magnet steel mounting groove needed for self-assembling formation pole core Electromagnetic Design after the bulk-breaking of pole core and yoke sleeve assemble.
To the A/F b of elongated dovetail groove eck part and the ratio of pole core bulk-breaking baseplane width a, and the bottom width c of elongated dovetail groove (108) arranges in pairs or groups from the different values of the ratio of the degree of depth h of elongated dovetail groove (108) and carries out performance test, conclusion is as shown in table 1
Table 1 permanent magnet motor field structure parameter comparison
Visible, the A/F of elongated dovetail groove eck part gets 0.416 with the ratio of pole core bulk-breaking baseplane width, the ratio of the bottom width of elongated dovetail groove (108) and the degree of depth of elongated dovetail groove (108) gets 1.428, now dovetail inclined-plane ess-strain is minimum, and effect is best.
In order to content of the present utility model and implementation method are described, this specification gives specific embodiment.The object introducing details is not in an embodiment the scope of restriction claims, but helps to understand device described in the utility model.One skilled in the art should appreciate that: in the spirit and scope not departing from the utility model and claims thereof, the various amendments of most preferred embodiment step, change or to replace be all possible.Therefore, the utility model should not be limited to the content disclosed in most preferred embodiment and accompanying drawing.
Claims (6)
1. a rotor structure for permanent magnet motor, comprise: pole core and yoke sleeve (2), wherein pole core comprises the identical bulk-breaking of multiple structure (1), each bulk-breaking angularly compartment of terrain is arranged on the outer surface one week of yoke sleeve, and the exterior arc surface (101) of each bulk-breaking of pole core is provided with along the axially grooved magnet isolation tank (103) of rotating shaft and copper sheet mounting groove (104); Form magnet steel mounting groove between two adjacent pole core bulk-breakings, each magnet steel mounting groove top is offered elongated dove-tail and is become slot wedge mounting groove (102); It is characterized in that:
Each bulk-breaking has exterior arc surface (101) and baseplane (005), and for each cross section axially vertical with rotating shaft, each bulk-breaking of pole core has sector crosssection; The exterior arc surface (101) of each bulk-breaking has the eccentric throw of predetermined amount relative to the centre of gyration of pole core; The baseplane (005) of each bulk-breaking and the exterior surface of yoke sleeve, axially elongated dovetail groove (108) is had along rotating shaft in the baseplane (005) of each bulk-breaking, elongated dovetail groove (108) comprises eck part and dovetail, the bottom of the dovetail of elongated dovetail groove (108) is also axially arranged with multiple screw hole along rotating shaft, and each screw hole is all arranged along rotating shaft radial direction; Further, for each cross section axially vertical with rotating shaft, the A/F of the eck part of described elongated dovetail groove (108) and the ratio of bulk-breaking baseplane (005) width are 1/3 ~ 1/2;
The outer surface of described yoke sleeve (2) has multiple dovetail boss (202) at angularly interval, dovetail boss (202) has the structure that elongated dovetail groove (108) that bulk-breaking each with pole core offer matches, and the quantity of dovetail boss (202) is equal with elongated dovetail groove (108) quantity, pole core after being in place with yoke sleeve described each dovetail boss (202) be positioned at the inside of the elongated dovetail groove (108) matched; Each dovetail boss (202) also offers reverse counterbore (203) and the via hole (204) of many group coaxial communication along rotating shaft radial direction; Reverse counterbore (203) opening is arranged on the inside of yoke sleeve, the opening of via hole (204) is arranged on the outer surface of yoke sleeve, the screw hole of elongated dovetail groove (108) bottom of all each with the pole core bulk-breaking of the position of reverse counterbore (203) and via hole (204) and quantity matches, multiple screw (3) is installed on each and organizes reverse counterbore (203), via hole (204) and screw hole inside, makes each bulk-breaking (1) of pole core and yoke sleeve (2) fastening by screw (3);
The elongated keyway (201) that yoke sleeve lining is processed with along rotating shaft axis makes to realize between yoke sleeve and rotating shaft locating.
2. a kind of rotor structure for permanent magnet motor according to claim 1, it is characterized in that, the ratio of the bottom width of elongated dovetail groove (108) dovetail and the depth dimensions of elongated dovetail groove (108) is between 0.5 ~ 2.
3. a kind of rotor structure for permanent magnet motor according to claim 1, it is characterized in that, the bottom of described magnet steel mounting groove is plane.
4. a kind of rotor structure for permanent magnet motor according to claim 1, it is characterized in that, the degree of depth of elongated dovetail groove (108) should ensure after alinco assembled enters pole core, does not affect the distribution of the magnetic line of force.
5. a kind of rotor structure for permanent magnet motor according to claim 1, it is characterized in that, for each cross section axially vertical with rotating shaft, the outer angle (109) of the elongated dovetail groove (108) of each bulk-breaking of pole core is greater than the outer angle (205) of the corresponding dovetail boss (202) of yoke sleeve (2) outer surface, to ensure to assemble rear dovetail groove position reliable contacts.
6. a kind of rotor structure for permanent magnet motor according to claim 1, it is characterized in that, the A/F of elongated dovetail groove eck part gets 0.416 with the ratio of pole core bulk-breaking baseplane width, and the ratio of the bottom width of elongated dovetail groove (108) and the degree of depth of elongated dovetail groove (108) gets 1.428.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420770895.2U CN204258476U (en) | 2014-12-10 | 2014-12-10 | A kind of rotor structure for permanent magnet motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420770895.2U CN204258476U (en) | 2014-12-10 | 2014-12-10 | A kind of rotor structure for permanent magnet motor |
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| CN204258476U true CN204258476U (en) | 2015-04-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428453A (en) * | 2017-08-30 | 2019-03-05 | 张峰 | High-speed motor dynamic balancing self-reacting device |
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2014
- 2014-12-10 CN CN201420770895.2U patent/CN204258476U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428453A (en) * | 2017-08-30 | 2019-03-05 | 张峰 | High-speed motor dynamic balancing self-reacting device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170621 Address after: Victory Street 030009 Shanxi Xinghualing district city of Taiyuan province No. 101 building 118 layer 1 Patentee after: Shanxi Beifang machine Holding Co., Ltd. Address before: 030009 Shengli Street, Shanxi, Taiyuan, No. 101 Patentee before: Shanxi North Machine-building Co., Ltd. |
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| TR01 | Transfer of patent right |