CN209896790U - Neodymium iron boron magnetic steel rotor assembly - Google Patents
Neodymium iron boron magnetic steel rotor assembly Download PDFInfo
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- CN209896790U CN209896790U CN201920029855.5U CN201920029855U CN209896790U CN 209896790 U CN209896790 U CN 209896790U CN 201920029855 U CN201920029855 U CN 201920029855U CN 209896790 U CN209896790 U CN 209896790U
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- impeller
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- neodymium iron
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Abstract
The utility model provides a neodymium iron boron magnetic steel rotor is integrated, including impeller and pivot, it still includes graphite bearing, the cylindricality rotor core that has the centre bore, polylith neodymium iron boron magnetism steel sheet, first plastic-sealed body and second plastic-sealed body, graphite bearing has the bearing centre bore, the rotor core centre bore supplies graphite bearing to embolia, first plastic-sealed body is located between graphite bearing and the rotor core and moulds plastics fixedly with both, first plastic-sealed body lateral surface is formed with a plurality of frames that hold that are used for injecing neodymium iron boron magnetism steel sheet, neodymium iron boron magnetism steel sheet sets up to bond in holding the frame and is fixed in the rotor core lateral surface, constitute the equipment magnet steel, second plastic-sealed body wraps up in the rotor component that moulds plastics of equipment magnet steel surface formation, leave the pilot hole that supplies the pivot to pass. The utility model discloses it is integrated to make the rotor with neodymium iron boron magnetic steel, rotor core and rotor bearing parcel in the plastic envelope shell, and the rotor is kept apart with liquid at the operation in-process, prevents the destruction to neodymium iron boron material surface of constantly erodeing of liquid under high temperature, high pressure, the high-speed condition.
Description
Technical Field
The utility model relates to an electric motor rotor technical field.
Background
The ndfeb magnet is the most powerful permanent magnet and the most commonly used rare-earth magnet, and is widely used in electronic products. The neodymium iron boron has two types of sintered neodymium iron boron and bonded neodymium iron boron. The existing rotor integration method is to adopt bonded neodymium iron boron and spray teflon protection on the surface of the bonded neodymium iron boron. However, teflon is prone to surface foaming and peeling under high temperature and high pressure. Therefore, a ndfeb magnetic steel rotor which can still be applied in high-temperature, high-pressure and high-speed environments is required.
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides the neodymium iron boron magnetic steel rotor which can still be suitable for high-temperature, high-pressure and high-speed environments.
In order to realize the purpose, the invention adopts the following technical scheme: the utility model provides a neodymium iron boron magnetic steel rotor is integrated, includes assembled connection's impeller and pivot, and it still includes:
graphite bearing, the cylindricality rotor core that has the centre bore, polylith neodymium iron boron magnetism steel sheet, first plastic-sealed body and second plastic-sealed body, graphite bearing has the bearing centre bore that holds the pivot, the rotor core centre bore supplies graphite bearing to embolia, first plastic-sealed body is located between graphite bearing and the rotor core and moulds plastics fixedly with both, first plastic-sealed body lateral surface takes shape to have a plurality of frames that hold that are used for injecing neodymium iron boron magnetism steel sheet, neodymium iron boron magnetism steel sheet sets up to bond fixation in holding the frame rotor core lateral surface, constitute the equipment magnet steel, the second plastic-sealed body parcel forms the rotor component of moulding plastics in equipment magnet steel surface, leave the pilot hole that supplies the pivot to pass.
Preferably, the second plastic package body is formed into an integrally injection-molded cylindrical shell and an impeller lower shell, the impeller lower shell is provided with a disk-shaped end face, the center of the disk-shaped end face is provided with a central hole for the rotating shaft to pass through, and the impeller lower shell is butted with the impeller upper shell to form the impeller.
Further, casing includes impeller top cap and polylith blade on the impeller, and the disk-shaped terminal surface of casing is equipped with many arc ultrasonic welding grooves that match with the blade under the impeller, and the blade welds in the ultrasonic welding inslot.
Furthermore, a plurality of positioning columns are arranged at the bottoms of the blades of the upper shell of the impeller, and a plurality of positioning holes are formed at the bottom of the ultrasonic welding groove of the lower shell of the impeller.
As another embodiment, the second plastic molded body is shaped as a cylindrical member having a central through hole.
Preferably, the outer side surface of the graphite bearing is provided with an injection molding clamping groove, and the inner side surface of the first plastic package body is provided with a convex block formed in the injection molding process and filled in the injection molding clamping groove.
Preferably, the wall of the bearing center hole of the graphite bearing is provided with a vertical through groove.
Preferably, an annular boss is formed on the end face, far away from the impeller, of the first plastic package body, and an annular sealing groove is formed at the bottom of the annular boss.
Preferably, the annular boss is provided with a plurality of first guide grooves which penetrate radially.
Further, a plurality of second guiding gutters are arranged on the periphery of the annular boss.
Compared with the prior art, the invention has the advantages that: the neodymium iron boron magnetic steel, the rotor iron core and the rotor bearing are wrapped in the plastic package shell to form a rotor assembly, the rotor is isolated from liquid in the operation process through two times of plastic package, the damage to the surface of the neodymium iron boron material caused by continuous scouring of the liquid under the conditions of high temperature, high pressure and high speed is prevented, the magnetism of the manufactured neodymium iron boron rotor is high, and the surface magnetism is larger than 2900 GS.
Drawings
FIG. 1 is a schematic cross-sectional view of a prior art rotor assembly.
Fig. 2 is a schematic view of a graphite bearing.
Fig. 3 is a schematic view of a rotor core.
Fig. 4 is a schematic cross-sectional view of an injection molded semi-finished product formed by the first plastic package of the graphite bearing and the rotor core.
Fig. 5 is an axonometric view of an injection molding semi-finished product formed by the first plastic package of the graphite bearing and the rotor core.
Fig. 6 is a schematic structural view of a neodymium iron boron magnetic steel sheet.
Fig. 7 is a schematic cross-sectional view of an assembled magnetic steel obtained after the neodymium iron boron magnetic steel sheet and the injection molding semi-finished product are assembled.
Fig. 8 is an axonometric view of the assembled magnetic steel obtained after the neodymium iron boron magnetic steel sheet is assembled with the injection molding semi-finished product.
FIG. 9 is a schematic cross-sectional view of an injection molded rotor component formed after the second injection molding in example 1.
FIG. 10 is an isometric view of an injection molded rotor component formed after the second injection molding in example 1.
Fig. 11 is a schematic view of the upper casing of the impeller in embodiment 1.
Fig. 12 is an isometric view of a rotor assembly obtained from example 1 after ultrasonic welding (the shaft is not shown for ease of viewing other components).
Fig. 13 is a schematic sectional view of a rotor assembly obtained by ultrasonic welding in example 1 (the rotating shaft is not shown for the sake of easy visibility of other parts).
FIG. 14 is a schematic cross-sectional view of an injection molded rotor component formed after a second injection molding of example 2.
Fig. 15 is an exploded view of the present invention (the shaft is not shown).
Wherein the numerical designations denote the following:
Detailed Description
It is to be understood that the directional terms upper, lower, left, right, upward, downward, leftward, rightward and the like in the description are used for describing the orientations shown in the drawings, and are not restrictive. The terms inward, outward, inboard, outboard herein refer to ranges relative to the center of the component, e.g., with reference to the motor axis, with the inward and inboard referring to positions or orientations closer to or pointing toward the motor axis and the outward and outboard referring to locations further from the center of the motor, if not specifically stated. Furthermore, the terms horizontal, upright, suspended, etc. do not imply that the components are required to be absolutely horizontal or suspended, but rather are allowed to tilt somewhat. Such as horizontal simply means that its direction is more horizontal than vertical, and does not mean that the structure is perfectly horizontal, but may be slightly inclined.
Example 1
The utility model discloses a neodymium iron boron magnetic steel rotor is integrated, including impeller, pivot, still include graphite bearing 2, the cylindricality rotor core 3 that has the centre bore, polylith neodymium iron boron magnetism steel sheet 4, first plastic-sealed body 5 and second plastic-sealed body 8. The first plastic package body 5 is a plastic shell body formed by injection molding in a first set of molds, and the second plastic package body 8 is a plastic shell body formed by injection molding in a second set of molds.
As shown in fig. 2, the graphite bearing 2 has a bearing center hole for accommodating the motor shaft, and the hole wall of the center hole is provided with a vertical through groove 2.2, which can play a role in conducting fluid, increasing lubrication, reducing friction temperature, collecting fine impurities and reducing noise. The lateral surface of graphite bearing is equipped with the draw-in groove 2.1 of moulding plastics, and in the operation of moulding plastics for the first time, this groove can be filled by the liquid of moulding plastics.
As shown in fig. 3, the rotor core 3 has a center hole for the graphite bearing 2 to be inserted, and is formed in a prism shape.
As shown in fig. 4 and 5, the first plastic package body 5 is located between the graphite bearing 2 and the rotor core 3, and the graphite bearing and the rotor core 3 are fixed by injection molding, and the inner side surface of the first plastic package body has a protrusion formed in the injection molding process and filled in the injection molding slot 2.1. The outer side surface of the first plastic package body is provided with a plurality of containing frames used for limiting the neodymium iron boron magnetic steel sheets, the neodymium iron boron magnetic steel sheets are arranged in the containing frames and are fixedly bonded on the outer side surface of the rotor core, and the graphite bearing 2, the rotor core 3, the neodymium iron boron magnetic steel sheets 4 and the first plastic package body 5 jointly form an assembled magnetic steel 6.
The second plastic package body 8 wraps the outer surface of the assembling magnetic steel 6 to form an injection molding rotor component 9, and an assembling hole for the rotating shaft to pass through is reserved. In this example, the impeller is assembled and fixed by the impeller upper casing 7 and the impeller lower casing, and as shown in fig. 11, the impeller upper casing 7 is an independent component which comprises an impeller top cover and a plurality of blades 7.1, and a plurality of positioning columns 7.2 are arranged at the bottoms of the blades. Casing directly becomes partly of second plastic-sealed body 8 under the impeller, casing 8.6 under second plastic-sealed body 8 includes integrative cylindric shell 8.5 and the impeller that moulds plastics and form promptly, cylindric shell 8.5 wraps up in half equipment magnet steel outer peripheral face, the casing has the disc terminal surface under the impeller, open at the terminal surface center has the centre bore that supplies the pivot to pass, the terminal surface upper surface is equipped with many arc ultrasonic welding grooves 8.1 that match with the blade, the tank bottom is equipped with a plurality of locating holes and pairs with reference column 7.2, blade 7.1 welds in ultrasonic welding groove 8.1, thereby casing butt joint formation impeller on casing and the impeller under the messenger impeller.
As shown in fig. 5, an annular boss 5.4 is formed on the end surface of the first plastic package body 5 away from the impeller, and an annular sealing groove 5.1 is formed at the bottom of the annular boss, and is used for filling a plastic layer to perform a sealing function during the second injection molding. The annular boss is provided with a plurality of first guiding gutters 5.2 which are radially communicated, the periphery of the annular boss is provided with a plurality of second guiding gutters 5.3, and the guiding gutters are used for circulating plastics, preventing glue shortage and reducing the problems of cracking, shrinkage deformation and the like caused by stress concentration during the second injection molding operation.
The utility model discloses a neodymium iron boron magnetic steel rotor is integrated when the preparation, at first puts into first set of mould with graphite bearing 2 and rotor core 3 and moulds plastics, then is fixed in the lateral surface of the first injection molding body 5 that takes shape with neodymium iron boron magnetic steel sheet and holds the frame in, obtains equipment magnet steel 6. And then the assembled magnetic steel 6 is integrally placed into a second set of die, and injection molding is carried out to obtain the injection molding rotor component 9. The impeller upper casing is then fixedly attached to the injection molded rotor member 9 by ultrasonic welding and then the upper rotor shaft is assembled.
Example 2
The ndfeb magnetic steel rotor assembly in this embodiment includes an impeller, a rotating shaft, a graphite bearing 2, a cylindrical rotor core 3 with a central hole, a plurality of ndfeb magnetic steel sheets 4, a first plastic package body 5 and a second plastic package body 8, as in embodiment 1. The first plastic package body 5 is a plastic shell body formed by injection molding in a first set of molds, and the second plastic package body 8 is a plastic shell body formed by injection molding in a second set of molds. Except that the second plastic molded body in this example is shaped into a cylindrical member having a central through hole, as shown in fig. 14. The fixedly connected impeller and the rotating shaft are assembled and connected with the second plastic package body, so that rotor integration is formed.
The present invention includes, but is not limited to, the embodiments and the drawings, and all other product structures having the same material content as the technical solution of the present invention fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a neodymium iron boron magnetic steel rotor is integrated, includes assembly connection's impeller and pivot, its characterized in that still includes:
graphite bearing, the cylindricality rotor core that has the centre bore, polylith neodymium iron boron magnetism steel sheet, first plastic-sealed body and second plastic-sealed body, graphite bearing has the bearing centre bore that holds the pivot, the rotor core centre bore supplies graphite bearing to embolia, first plastic-sealed body is located between graphite bearing and the rotor core and moulds plastics fixedly with both, first plastic-sealed body lateral surface takes shape to have a plurality of frames that hold that are used for injecing neodymium iron boron magnetism steel sheet, neodymium iron boron magnetism steel sheet sets up to bond fixation in holding the frame rotor core lateral surface, constitute the equipment magnet steel, the second plastic-sealed body parcel forms the rotor component of moulding plastics in equipment magnet steel surface, leave the pilot hole that supplies the pivot to pass.
2. The ndfeb magnetic steel rotor assembly of claim 1, wherein: the second plastic package body is formed into an integrally injection-molded cylindrical shell and an impeller lower shell, the impeller lower shell is provided with a disk-shaped end face, the center of the disk-shaped end face is provided with a central hole for a rotating shaft to penetrate through, and the impeller lower shell is in butt joint with the impeller upper shell to form the impeller.
3. The ndfeb magnetic steel rotor assembly of claim 2, wherein: the casing includes impeller top cap and polylith blade on the impeller, and the disk-shaped terminal surface of casing is equipped with many arc ultrasonic welding grooves that match with the blade under the impeller, and the blade welds in the ultrasonic welding inslot.
4. The ndfeb magnetic steel rotor assembly of claim 3, wherein: the bottom of the blade of the upper shell of the impeller is provided with a plurality of positioning columns, and the bottom of the ultrasonic welding groove of the lower shell of the impeller is provided with a plurality of positioning holes.
5. The ndfeb magnetic steel rotor assembly of claim 1, wherein: the second plastic package body is shaped as a cylindrical member having a central through hole.
6. The ndfeb magnetic steel rotor assembly of claim 1, wherein: the outer side surface of the graphite bearing is provided with an injection molding clamping groove, and the inner side surface of the first plastic package body is provided with a convex block formed in the injection molding process and filled in the injection molding clamping groove.
7. The ndfeb magnetic steel rotor assembly of claim 1, wherein: the wall of the bearing center hole of the graphite bearing is provided with a vertical groove which is communicated up and down.
8. The ndfeb magnetic steel rotor assembly of claim 1, wherein: an annular boss is formed on the end face, far away from the impeller, of the first plastic package body, and an annular sealing groove is formed at the bottom of the annular boss.
9. The ndfeb magnetic steel rotor assembly of claim 8, wherein: the annular boss is provided with a plurality of first guide grooves which are radially communicated.
10. The ndfeb magnetic steel rotor assembly of claim 8, wherein: a plurality of second guiding gutters are arranged on the periphery of the annular boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920029855.5U CN209896790U (en) | 2019-01-08 | 2019-01-08 | Neodymium iron boron magnetic steel rotor assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920029855.5U CN209896790U (en) | 2019-01-08 | 2019-01-08 | Neodymium iron boron magnetic steel rotor assembly |
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| Publication Number | Publication Date |
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| CN209896790U true CN209896790U (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920029855.5U Active CN209896790U (en) | 2019-01-08 | 2019-01-08 | Neodymium iron boron magnetic steel rotor assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114114877A (en) * | 2021-12-07 | 2022-03-01 | 常州鹏科电子有限公司 | Rotor wheel and preparation process |
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2019
- 2019-01-08 CN CN201920029855.5U patent/CN209896790U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114114877A (en) * | 2021-12-07 | 2022-03-01 | 常州鹏科电子有限公司 | Rotor wheel and preparation process |
| CN114114877B (en) * | 2021-12-07 | 2023-04-28 | 常州鹏科电子有限公司 | Rotor wheel and preparation process thereof |
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