CN210693594U - Rotor core punching sheet, rotor assembly and electronic pump - Google Patents
Rotor core punching sheet, rotor assembly and electronic pump Download PDFInfo
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- CN210693594U CN210693594U CN201921870287.8U CN201921870287U CN210693594U CN 210693594 U CN210693594 U CN 210693594U CN 201921870287 U CN201921870287 U CN 201921870287U CN 210693594 U CN210693594 U CN 210693594U
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Abstract
The utility model relates to the technical field of electronic pumps, in particular to a rotor core punching sheet, a rotor assembly and an electronic pump; the surface of the rotor core punching sheet is provided with a plurality of magnetic steel holes which are arranged at intervals and used for placing magnetic steel, and a magnetic leakage bridge is arranged between every two adjacent magnetic steel holes; the rotor assembly comprises a magnetic steel upper retainer ring, a magnetic steel lower retainer ring, a rotor lower end ring, a rotor upper end ring, magnetic steel, a rotor shaft, a rotor shielding sleeve and the rotor core stamped sheet; an electronic pump includes the present rotor assembly. The utility model discloses set up the magnetic leakage bridge between adjacent magnet steel hole, when stator armature magnetic field acted on the magnet steel, the magnetic leakage bridge can play the effect in reposition of redundant personnel partial stator armature magnetic field, and then the effectual influence that reduces armature magnetic field to the magnet steel possesses higher anti demagnetization performance.
Description
Technical Field
The utility model relates to an electronic pump technical field especially relates to a rotor core is towards piece, rotor subassembly and electronic pump.
Background
In recent years, with the rapid development of new energy automobiles, a shielding type electronic pump is widely applied to a vehicle thermal management system due to the characteristics of safety, reliability, no leakage and the like.
The existing electronic pump is mostly applied to a thermal management system of a pure electric vehicle, the power of the electronic pump is generally below 120 watts, a rotor magnetic pole structure is a surface type magnetic ring structure or a built-in linear structure, and the defect of insufficient demagnetization resistance exists in a high-power occasion. For a hydrogen fuel cell vehicle type heat management system, the power of an electronic pump is about 1000 watts generally, and the system has the advantages of wide speed regulation range, high demagnetization resistance, small volume, strong corrosion resistance of a rotor and low vibration noise.
The anti demagnetization ability of the rotor magnetic pole structure for the existing electronic pump is not enough, and the rotor magnetic pole structure is not beneficial to popularization and application in the electronic pump of a hydrogen fuel cell vehicle type heat management system.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The embodiment of the utility model provides a rotor core is towards piece, rotor subassembly and electronic pump to solve the not enough technical problem of anti demagnetization ability of rotor magnetic pole structure for electronic pump that exists among the prior art.
(II) technical scheme
In order to solve the technical problem, the embodiment of the utility model provides a rotor core is towards piece, rotor core is equipped with the magnet steel hole that is used for placing the magnet steel that a plurality of intervals were arranged towards the surface of piece, and is adjacent be equipped with the magnetic leakage bridge between the magnet steel hole.
The magnetic steel holes are multiple groups, each magnetic steel hole comprises a first magnetic steel hole and a second magnetic steel hole, an included angle between each first magnetic steel hole and each second magnetic steel hole is 80-120 degrees, and the magnetic leakage bridge is arranged at the near end of each first magnetic steel hole and each second magnetic steel hole.
The magnetic steel hole comprises a hole body, a first end portion and a second end portion, wherein the first end portion and the second end portion are located at two ends of the hole body, and a magnetic steel positioning column is constructed on the hole body.
Wherein, first tip and second tip are constructed with first fillet, and the radius of first fillet is less than the fillet of magnet steel.
The rotor core punching sheet is provided with a plurality of self-buckling points, and the circumferential edge of the rotor core punching sheet is provided with a plurality of welding grooves.
Wherein, the width of the magnetic leakage bridge ranges from 0.7 to 1.2 mm, and the length ranges from 3 to 5 mm.
The embodiment of the utility model provides a still disclose a rotor subassembly, including magnet steel go up retaining ring, magnet steel lower retaining ring and a plurality of superpose if the utility model discloses a rotor core towards the rotor core that the piece formed, the bottom of retaining ring is equipped with first calorie of post on the magnet steel, the top of retaining ring is equipped with second card post under the magnet steel, the rotor core upper surface is equipped with first card post groove, the rotor core lower surface is equipped with second card post groove, first card post with first card post groove cooperation is connected, the second card post with second card post groove cooperation is connected.
The magnetic steel lower end ring is fixed at the bottom of the magnetic steel lower retainer ring, and the rotor upper end ring is fixed at the top of the magnetic steel upper retainer ring.
Wherein, still include magnet steel, rotor shaft and rotor housing, the magnet steel place in the magnet steel hole, every place at least one in the magnet steel hole the magnet steel, the rotor shaft passes rotor core's central shaft hole, rotor housing cover is located rotor core's the outside.
The embodiment of the utility model provides a still disclose an electronic pump, include if the utility model discloses a rotor subassembly.
(III) advantageous effects
The embodiment of the utility model provides a pair of rotor core is towards piece, rotor subassembly and electronic pump sets up the magnetic leakage bridge between adjacent magnetic steel hole, and when stator armature magnetic field acted on the magnet steel, the magnetic leakage bridge can play the effect in reposition of redundant personnel partial stator armature magnetic field, and then the effectual influence that has reduced armature magnetic field to the magnet steel possesses higher anti demagnetization performance.
Drawings
Fig. 1 is a schematic structural diagram of a rotor core sheet according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a rotor assembly according to an embodiment of the present invention;
fig. 3 is an exploded view of a rotor assembly in accordance with an embodiment of the present invention;
fig. 4 is the utility model discloses the structure schematic diagram of retaining ring under the magnet steel.
Reference numerals:
1: a rotor shaft; 21: an upper end ring of the rotor; 22: a rotor lower end ring; 31: the upper half section of the rotor injection molding material; 32: the lower half section of rotor injection molding material; 41: a magnetic steel upper retainer ring; 42: a magnetic steel lower retainer ring; 401: a second clamping column; 5: a rotor shield sleeve; 6: magnetic steel; 7: a rotor core; 70: punching a rotor iron core; 71: a magnetic steel hole; 711: a first end portion; 712: a hole body; 713: a second end portion; 72: a magnetic leakage bridge; 73: a first clip groove; 74: a magnetic steel positioning column; 75: welding a groove; 76: self-buckling points; 77: a first magnetic steel hole; 78: and a second magnetic steel hole.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the embodiment of the utility model discloses rotor core is towards piece, rotor core towards piece 70 the surface be equipped with a plurality of intervals arrange be used for placing magnet steel 6's magnet steel hole 71, be equipped with between the adjacent magnet steel hole 71 and leak magnetic bridge 72.
The embodiment of the utility model provides an in between adjacent magnet steel hole 71 magnetic leakage bridge 72 be the solid structure, and magnet steel hole 71 is hollow out construction promptly, and magnetic leakage bridge 72 is the solid structure between the adjacent magnet steel hole 71 hollow out construction. When the magnetic steel 6 is placed in the magnetic steel hole 71, due to the existence of the magnetic leakage bridge 72, when the stator armature magnetic field acts on the magnetic steel 6, the rotor core 7 (namely formed by laminating a plurality of rotor core laminations 70) can play a role in shunting part of the stator armature magnetic field, so that the influence of the armature magnetic field on the magnetic steel 6 is effectively reduced, and the magnetic leakage bridge has higher demagnetization resistance compared with a surface type magnetic ring structure or a built-in linear structure.
Specifically, the magnetic steel holes 71 in this embodiment have multiple arrangement modes, but because the rotor core stamped steel 70 is of a circular ring structure, in order to save space and construct the magnetic leakage bridge 72, the magnetic steel holes 71 may be arranged at a certain angle, two magnetic steel holes 71 form a "V" shaped structure, and a distance between outward-facing portions (i.e., portions close to a circumferential edge of the rotor core stamped steel 70) of the two magnetic steel holes 71 is greater than a distance between inward-facing portions (i.e., portions close to a center of the rotor core stamped steel 70). The flux leakage bridge 72 is a part between the end parts of the adjacent magnet steel holes 71 close to the circle center of the rotor core stamped steel 70.
The embodiment of the utility model provides a pair of rotor core is towards piece, rotor subassembly and electronic pump sets up the magnetic leakage bridge between adjacent magnetic steel hole, and when stator armature magnetic field acted on the magnet steel, the magnetic leakage bridge can play the effect in reposition of redundant personnel partial stator armature magnetic field, and then the effectual influence that has reduced armature magnetic field to the magnet steel possesses higher anti demagnetization performance.
The number of the magnetic steel holes 71 is multiple, each group of magnetic steel holes 71 comprises a first magnetic steel hole 77, a second magnetic steel hole 78, an included angle between the first magnetic steel hole 77 and the second magnetic steel hole 78 is 80-120 degrees, and the magnetic leakage bridge 72 is arranged at the near end of the first magnetic steel hole 77 and the second magnetic steel hole 78. As shown in fig. 1, due to the circular ring structure of the rotor core stamped steel 70, the end of the magnetic leakage bridge 72 close to the center of the rotor core stamped steel 70 is set as the close end of the first magnet steel hole 77 and the second magnet steel hole 78, the solid structure between the close ends is the magnetic leakage bridge 72, and the end close to the edge of the rotor core stamped steel 70 is set as the far end of the first magnet steel hole 77 and the second magnet steel hole 78. In the embodiment, each group of magnetic steel holes form a V-shaped structure, and the integral magnetizing and saturation is comprehensively considered in a limited space, so that the larger the included angle between the first magnetic steel hole 77 and the second magnetic steel hole 78 is required to be; however, if a high rotor magnetic density is obtained, the magnetic steel width is required to be larger, and the included angle is required to be smaller, the two situations are comprehensively considered in the embodiment, and the rotor is easy to realize integral magnetization by adopting a mode that the magnetic steel hole 71 forms an angle of 80-120 degrees, so that the rotor air gap magnetic density is maximized, and the motor volume can be effectively reduced.
The magnetic steel hole 71 includes a hole body 712, and a first end portion 711 and a second end portion 713 located at two ends of the hole body 712, and the hole body 712 is configured with a magnetic steel positioning column 74. The magnetic steel positioning column 74 in this embodiment is a solid structure protruding toward the inside of the magnetic steel hole, the magnetic steel 6 is placed in the hole body 712 of the magnetic steel hole 71 in an axial insertion manner, and the magnetic steel positioning column 74 is used for radial positioning, so that the magnetic steel 6 is ensured to be positioned accurately.
The first end 711 and the second end 713 are configured with a first rounded corner, and the radius of the first rounded corner is smaller than that of the magnetic steel 6. In this embodiment, two ends of the magnetic steel hole 71 are provided with round corners, and the radius of the round corners is smaller than that of the actually inserted magnetic steel 6. Four corners of the magnetic steel 6 are respectively rounded, and the radius of the rounded corner is 0.5-1 mm; and the radius of the first round angle is 0.2-0.4 mm, so that gaps exist between four corners of the magnetic steel 6 and the rotor iron core 7, and the demagnetization resistance of the corners of the magnetic steel 6 can be improved.
A plurality of self-fastening points 76 are uniformly distributed on the rotor core stamped sheet 70, and a plurality of welding grooves 75 are uniformly distributed on the circumferential edge of the rotor core stamped sheet 70. Specifically, the self-fastening points 76 are disposed between adjacent groups of the magnetic steel holes 71, and the welding grooves 75 are disposed between adjacent groups of the magnetic steel holes and located at the circumferential edge of the rotor core stamped sheet 70. In this embodiment, the thickness of the rotor core stamped sheet 70 is less than or equal to 0.5 mm, the plurality of rotor core stamped sheets 70 are laminated to form the rotor core 7 under the action of the self-fastening point 76, and the rotor core is welded and reinforced at the welding groove 75, so that the phenomena of core deformation and warping are not easy to occur.
Wherein, the width of the magnetic leakage bridge 72 ranges from 0.7 to 1.2 mm, and the length ranges from 3 to 5 mm.
As shown in fig. 2, fig. 3 and fig. 4, the embodiment of the utility model provides a still disclose a rotor assembly, including the magnet steel go up retaining ring 41, under the magnet steel retaining ring 42 and a plurality of superpose be in the same place the utility model discloses a rotor core 7 that retaining ring 70 formed on the magnet steel, the bottom of retaining ring 42 is equipped with first calorie of post (not marking in the picture) on the magnet steel, and the top of retaining ring 42 is equipped with second calorie of post 401 under the magnet steel, and rotor core 7 upper surface is equipped with first calorie of post groove 73, and rotor core 7 lower surface is equipped with second calorie of post groove (not marking in the picture), and first calorie of post is connected with first calorie of post groove 73 cooperation, and second calorie of post 401 is connected with second calorie of post groove cooperation. As shown in fig. 4, the structure of the magnetic steel upper retainer ring 41 is similar to that of the magnetic steel lower retainer ring 42
Specifically, the magnetic steel upper retainer ring 41 and the magnetic steel lower retainer ring 42 are made of plastic. Insert first card post groove 73 through first card post in this embodiment and form interference fit, fix retaining ring 41 on the magnet steel at rotor core 7 top, insert second card post groove formation interference fit through second card post 401, fix retaining ring 42 under the magnet steel in rotor core 7 bottom. In the embodiment, the magnetic steel upper retainer ring 41 and the magnetic steel lower retainer ring 42 are used for axially positioning in the injection molding process, and a magnetic steel positioning needle of an injection molding machine is replaced, so that the magnetic steel of the rotor can be completely wrapped by injection molding plastics after injection molding, and the corrosion resistance of the rotor is improved.
The magnetic steel rotor structure further comprises a rotor lower end ring 22 and a rotor upper end ring 21, wherein the rotor lower end ring 22 is fixed at the bottom of the magnetic steel lower retainer ring 42, and the rotor upper end ring 21 is fixed at the top of the magnetic steel upper retainer ring 41.
Wherein, still include magnet steel 6, rotor shaft 1 and rotor housing 5, every place at least one in the magnet steel hole 71 magnet steel 6, rotor shaft 1 passes rotor core 7's central shaft hole, rotor housing 5 covers the outside of locating rotor core 7.
The utility model discloses rotor subassembly's preparation step includes:
s1, punching a plurality of rotor core stamped sheets 70 from the silicon steel sheet through a punch press, and then laminating the plurality of rotor core stamped sheets 70 into a rotor core 7 through the mutual self-buckling point 76;
s2, welding and reinforcing the rotor core 7 at the welding groove 75 of the rotor core 7, so that the core deformation and warping phenomena are not easy to occur in the subsequent step S3, and the scattering phenomena are not easy to occur in the subsequent step S4;
s3, pressing the rotor shaft 1 on the rotor iron core 7 through a shaft pressing tool;
s4, after the rotor iron core 7 is pressed into the rotor shaft 1, performing finish turning on the outer diameter of the rotor by a numerical control lathe;
s5, pressing the rotor shielding sleeve 5 to the outer circle side of the rotor iron core 7 through the rotor shielding sleeve pressing tool;
s6, pressing a magnetic steel lower retainer ring 42 into the bottom of the rotor core 7, inserting a plurality of magnetic steels 6 into the magnetic steel holes 71, pressing a magnetic steel upper retainer ring 41 into the top of the rotor core 7, respectively performing integral injection molding on the upper end and the rotor upper end ring 21 (forming a rotor injection molding material upper half section 31), and performing integral injection molding on the lower end and the rotor lower end ring 22 (forming a rotor injection molding material lower half section 32);
s7, verifying dynamic balance of the injection molded rotor in a weight removing mode through drilling the upper end ring 21 of the rotor, and wholly magnetizing the injection molded rotor through a magnetizing tool to obtain the rotor for the electronic pump. The rotor upper end ring 21 and the rotor lower end ring 22 in this step may be made of copper or stainless steel, and the dynamic balance may be verified in a weight-removing manner.
The utility model discloses in the rotor subassembly was applied to hydrogen fuel cell car thermal management system's electronic pump, the permanent magnet can provide permanent excitation magnetic field, changes stator magnetic field rotational frequency through outer circuit, makes the rotor follow the stator magnetic field rotation, finally reaches the synchronous revolution state with stator magnetic field to make it possess the wide advantage of speed governing scope.
To sum up, the utility model discloses the rotor subassembly possesses characteristics such as the speed governing scope is wide, anti demagnetization performance is high, small, the rotor resistance to corrosion is strong, vibration noise is little, satisfies the requirement of the high-power electronic pump of hydrogen fuel cell motorcycle type thermal management system to whole rotor subassembly manufacture process is simple, reliable, easily realize batch production streamlined.
The embodiment of the utility model provides a still disclose an electronic pump, include like the utility model discloses the rotor subassembly of embodiment.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a rotor core is towards piece, its characterized in that, rotor core is equipped with a plurality of intervals and arranges the magnet steel hole that is used for placing the magnet steel towards the surface of piece, and is adjacent be equipped with the magnetic leakage bridge between the magnet steel hole.
2. The rotor core punching sheet according to claim 1, wherein the number of the magnetic steel holes is multiple, each group of the magnetic steel holes comprises a first magnetic steel hole and a second magnetic steel hole, an included angle between the first magnetic steel hole and the second magnetic steel hole is 80-120 °, and the leakage bridge is arranged at a near end of the first magnetic steel hole and the second magnetic steel hole.
3. The rotor core punching sheet according to claim 1, wherein the magnetic steel hole comprises a hole body, and a first end portion and a second end portion which are located at two ends of the hole body, and the hole body is provided with a magnetic steel positioning column.
4. The rotor core stamped sheet according to claim 3, wherein the first end portion and the second end portion are configured with a first fillet, and a radius of the first fillet is smaller than a radius of the magnetic steel.
5. The rotor core stamped sheet according to claim 1, wherein a plurality of self-fastening points are uniformly distributed on the rotor core stamped sheet, and a plurality of welding grooves are uniformly distributed on the circumferential edge of the rotor core stamped sheet.
6. The rotor core punching sheet according to any one of claims 1 to 5, wherein the width of the magnetic leakage bridge ranges from 0.7 to 1.2 mm, and the length ranges from 3 to 5 mm.
7. A rotor assembly, comprising an upper magnetic steel retaining ring, a lower magnetic steel retaining ring, and a plurality of stacked rotor cores formed by the rotor core sheets as claimed in any one of claims 1 to 6, wherein the bottom of the upper magnetic steel retaining ring is provided with a first clamping column, the top of the lower magnetic steel retaining ring is provided with a second clamping column, the upper surface of the rotor core is provided with a first clamping column groove, the lower surface of the rotor core is provided with a second clamping column groove, the first clamping column is connected with the first clamping column groove in a matching manner, and the second clamping column is connected with the second clamping column groove in a matching manner.
8. The rotor assembly of claim 7, further comprising a rotor lower end ring and a rotor upper end ring, wherein the rotor lower end ring is fixed to the bottom of the magnetic steel lower retainer ring, and the rotor upper end ring is fixed to the top of the magnetic steel upper retainer ring.
9. The rotor assembly of claim 7, further comprising magnetic steels, a rotor shaft and a rotor shielding sleeve, wherein at least one of the magnetic steels is disposed in each magnetic steel hole, the rotor shaft passes through a central shaft hole of the rotor core, and the rotor shielding sleeve is sleeved outside the rotor core.
10. An electronic pump comprising a rotor assembly as claimed in any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921870287.8U CN210693594U (en) | 2019-11-01 | 2019-11-01 | Rotor core punching sheet, rotor assembly and electronic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921870287.8U CN210693594U (en) | 2019-11-01 | 2019-11-01 | Rotor core punching sheet, rotor assembly and electronic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210693594U true CN210693594U (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921870287.8U Active CN210693594U (en) | 2019-11-01 | 2019-11-01 | Rotor core punching sheet, rotor assembly and electronic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210693594U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111641282A (en) * | 2020-06-06 | 2020-09-08 | 台州迪邦科技有限公司 | Permanent magnet rotor punching sheet |
| CN113839490A (en) * | 2020-06-24 | 2021-12-24 | 莱克电气股份有限公司 | Rotor, efficient low-noise motor and application thereof |
-
2019
- 2019-11-01 CN CN201921870287.8U patent/CN210693594U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111641282A (en) * | 2020-06-06 | 2020-09-08 | 台州迪邦科技有限公司 | Permanent magnet rotor punching sheet |
| CN113839490A (en) * | 2020-06-24 | 2021-12-24 | 莱克电气股份有限公司 | Rotor, efficient low-noise motor and application thereof |
| CN113839490B (en) * | 2020-06-24 | 2023-05-30 | 莱克电气股份有限公司 | High-efficiency low-noise motor and application thereof |
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