CN106487171B - Magnetic steel fixing method, rotor assembly and motor - Google Patents
Magnetic steel fixing method, rotor assembly and motor Download PDFInfo
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- CN106487171B CN106487171B CN201610911135.2A CN201610911135A CN106487171B CN 106487171 B CN106487171 B CN 106487171B CN 201610911135 A CN201610911135 A CN 201610911135A CN 106487171 B CN106487171 B CN 106487171B
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- magnetic steel
- groove
- anaerobic adhesive
- wall surface
- glue
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 413
- 239000010959 steel Substances 0.000 title claims abstract description 413
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000000853 adhesive Substances 0.000 claims abstract description 105
- 230000001070 adhesive effect Effects 0.000 claims abstract description 105
- 239000003292 glue Substances 0.000 claims abstract description 68
- 238000007789 sealing Methods 0.000 claims abstract description 38
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims description 13
- 239000004819 Drying adhesive Substances 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 239000000565 sealant Substances 0.000 abstract description 48
- 238000007711 solidification Methods 0.000 abstract description 8
- 230000008023 solidification Effects 0.000 abstract description 8
- 239000012945 sealing adhesive Substances 0.000 description 7
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a method for fixing magnetic steel, a rotor assembly and a motor, wherein the method for fixing the magnetic steel comprises the steps of coating anaerobic adhesive on the inner wall surface of a magnetic steel groove and/or the side wall surface of the magnetic steel, and embedding the magnetic steel into the magnetic steel groove; or embedding the magnetic steel into the magnetic steel groove, and injecting anaerobic adhesive into the gap between the magnetic steel and the magnetic steel groove; and (3) pouring sealant into two end parts of the magnetic steel, solidifying anaerobic adhesive by the sealant, and isolating the sealant from the outside, and solidifying the anaerobic adhesive to bond the magnetic steel with the magnetic steel groove. The rotor assembly comprises a rotor core, magnetic steel, anaerobic adhesive and a sealing element. A magnetic steel slot is formed in the rotor iron core; the magnetic steels are embedded into the magnetic steel grooves in a one-to-one correspondence manner; the anaerobic adhesive is arranged between the magnetic steel and the magnetic steel groove and fixes the magnetic steel and the magnetic steel groove; the sealing elements are arranged on the two end parts of the magnetic steel and enclose with the magnetic steel groove to form a closed space in which the anaerobic adhesive and the magnetic steel are sealed. The motor comprises the rotor assembly. The sealing glue on the magnetic steel is solidified, so that the interior of the magnetic steel groove is isolated from the outside, a closed environment is formed, and the solidification speed of the anaerobic glue is accelerated in the closed environment.
Description
Technical Field
The invention belongs to the technology of motors, and particularly relates to a magnetic steel fixing method, a rotor assembly and a motor.
Background
Be provided with the magnet steel among the prior art in the rotor core of motor, in the magnet steel groove 11 of seting up on the circumference of rotor core 1 for the magnet steel assembly, as shown in fig. 1, adopt clearance fit between magnet steel 2 and the magnet steel groove 11, for preventing magnet steel 2 drunkenness in magnet steel groove 11, need fix magnet steel 2 in magnet steel groove 11 through the glue of spraying on magnet steel 2 outer wall all around.
For example, chinese patent document CN101159392A discloses a method for fixing rotor magnetic steel, which includes the following steps: coating anaerobic adhesive on the outer wall surfaces of the periphery of the magnetic steel, and then inserting the magnetic steel into a magnetic steel groove on a rotor core to pre-fix the magnetic steel and the inner wall surface of the magnetic steel groove; and then, the outer wall surfaces of the periphery of the magnetic steel are coated with balance mud, when the balance mud is not solidified, the rotor core is dynamically balanced, namely, the rotor core meets the requirement of dynamic balance by adding the balance mud, and a rotor whole body is formed after all the balance mud is solidified.
However, in the magnetic steel fixing method, when the anaerobic adhesive coated on the peripheral wall surface of the magnetic steel is pre-fixed with the magnetic steel groove, the anaerobic adhesive is always communicated with the outside air, the anaerobic adhesive is slow in curing speed under the action of oxygen in the air, and in the curing process, part of gas is wrapped in the anaerobic adhesive, so that bubbles exist when the magnetic steel is bonded with the magnetic steel groove, and the bonding is not firm. Even if balance mud is coated on the outer wall surfaces of the periphery of the magnetic steel subsequently, the end part of the magnetic steel is still communicated with the outside air, and the curing speed of the magnetic steel and the bonding performance after curing are still influenced.
Disclosure of Invention
Therefore, the invention aims to solve the technical problems that in the magnetic steel fixing method in the prior art, the solidification speed of the bonding glue is low, and the bonding of the magnetic steel and the magnetic steel groove is not firm.
Therefore, the invention provides a method for fixing magnetic steel, which comprises the following steps
S1: coating anaerobic adhesive on the inner wall surface of a magnetic steel groove of a rotor core and/or the side wall surface of magnetic steel, and embedding the magnetic steel into a preset position in the magnetic steel groove; or embedding the magnetic steel into a magnetic steel groove of the rotor core, and injecting anaerobic adhesive into a gap formed between the side wall surface of the magnetic steel and the inner wall surface of the magnetic steel groove;
s2: and pouring sealant on the end faces of the two end parts of the magnetic steel, solidifying the sealant to isolate anaerobic adhesive in the magnetic steel groove from the outside, and solidifying the anaerobic adhesive to bond and fix the magnetic steel and the magnetic steel groove.
Preferably, in the method for fixing the magnetic steel, in the step S1, along the axial direction of the rotor core, the length of the coated anaerobic adhesive after the magnetic steel is in place is smaller than the length of the magnetic steel; and a first gap is formed between the side wall surface of at least one end of the magnetic steel and the inner wall surface of the magnetic steel groove.
Further preferably, in the step S2, the sealant is filled into the first gap, and then the sealant is poured into the end faces of the two end portions of the magnetic steel.
According to the method for fixing the magnetic steel, the length of the magnetic steel groove is larger than that of the magnetic steel along the axial direction of the rotor core, and an inward concave groove is formed between at least one end face of the magnetic steel groove and the corresponding end face of the magnetic steel;
and in the step S2, filling the first gap and the groove with the sealant, and making the outer surface of the sealant flush with the end surface of the rotor core.
Preferably, the sealant is a quick-drying glue which can be quickly solidified at normal temperature.
Preferably, the quick-drying adhesive is a UV adhesive, and after the sealant is poured onto the end faces of the two end portions of the magnetic steel in the step S2, the method further includes a step of irradiating the UV adhesive with ultraviolet light to cure the UV adhesive.
The invention provides a rotor assembly, comprising
The rotor core is provided with an inner hole and at least two magnetic steel grooves which are even number along the axial direction, and the magnetic steel grooves are symmetrically distributed on the circumference of the inner hole around the circumferential end surface of the rotor core;
the magnetic steels correspond to the magnetic steel grooves one by one and are suitable for being embedded into the magnetic steel grooves;
anaerobic adhesive is arranged between the side wall surface of the magnetic steel and the inner wall surface of the magnetic steel groove and is used for fixing the magnetic steel and the magnetic steel groove; and is
Sealing elements are respectively arranged at two end parts of the magnetic steel, and the sealing elements and the magnetic steel groove enclose a closed space in which the anaerobic adhesive and the magnetic steel are sealed.
Preferably, the length of the magnetic steel is smaller than that of the magnetic steel groove, and an inward concave groove is formed between at least one end face of the magnetic steel groove and the corresponding end face of the magnetic steel;
at least one of the seals is embedded in the groove.
Preferably, in the rotor assembly, the length of the anaerobic adhesive is smaller than that of the magnetic steel, an annular gap is formed between the side wall surface of at least one end of the magnetic steel and the inner wall surface of the magnetic steel groove,
the seal is adapted to enter within the annular gap and enclose the ends of the magnetic steel therein.
Further preferably, in the above rotor assembly, the sealing member is a sealant.
The invention provides a motor, which comprises a rotor assembly.
The technical scheme provided by the invention has the following advantages:
1. the invention provides a method for fixing magnetic steel, which comprises the following steps: s1: coating anaerobic adhesive on the inner wall surface of a magnetic steel groove of a rotor core and/or the side wall surface of magnetic steel, and embedding the magnetic steel into a preset position in the magnetic steel groove; or embedding the magnetic steel into a magnetic steel groove of the rotor core, and injecting anaerobic adhesive into a gap formed between the side wall surface of the magnetic steel and the inner wall surface of the magnetic steel groove; s2: and pouring sealant on the end faces of the two end parts of the magnetic steel, solidifying the sealant to isolate anaerobic adhesive in the magnetic steel groove from the outside, and solidifying the anaerobic adhesive to bond and fix the magnetic steel and the magnetic steel groove.
According to the magnetic steel fixing method, two kinds of glue are adopted to ensure the adhesiveness between the magnetic steel and the magnetic steel groove, the side wall surface of the magnetic steel and the inner wall surface of the magnetic steel groove are pre-adhered by injecting anaerobic glue, then the sealant is injected on the end surfaces of the two end parts of the magnetic steel, the sealant is cured to isolate the interior of the magnetic steel groove from the outside, so that a closed environment is formed, under the closed environment, the anaerobic glue can be rapidly and completely cured, the curing speed of the anaerobic glue is improved, and the magnetic steel is adhered to the inner wall surface of the magnetic steel groove; meanwhile, the end part of the magnetic steel can be fixed on the magnetic steel groove after the sealing glue is cured, so that the bonding firmness between the magnetic steel and the magnetic steel groove is further ensured.
2. According to the method for fixing the magnetic steel, in the step S1, the length of the coated anaerobic adhesive after the magnetic steel is in place is smaller than that of the magnetic steel along the axial direction of the rotor iron core; and a first gap is formed between the side wall surface of at least one end of the magnetic steel and the inner wall surface of the magnetic steel groove. When the sealant is poured into the two end faces of the magnetic steel in the follow-up process, the sealant is embedded into the first gap, air in the first gap is discharged, the anaerobic adhesive is in a required anaerobic environment and can be quickly cured, the curing time of the anaerobic adhesive is shortened, and the fixing speed between the magnetic steel and the inner wall face of the magnetic steel groove is increased.
3. In the step S2, the sealant is filled into the first gap, and then the sealant is poured into the end faces of the two end portions of the magnetic steel. After the first gap is filled with the sealant, all air in the first gap can be discharged out of the magnetic steel groove, the anaerobic adhesive does not contain air in the environment, the curing speed of the anaerobic adhesive is further accelerated, and the magnetic steel groove are bonded and fixed more quickly; and follow-up sealed glue of pouring on the both ends of magnet steel further ensures that the both ends of anaerobic adhesive all enclosed in anaerobic enclosed environment for the solidification speed of anaerobic adhesive, sealed glue itself also is as the binder simultaneously, strengthens the bonding fastness between magnet steel and the magnet steel groove.
4. The invention provides a method for fixing magnetic steel, which is characterized in that along the axial direction of a rotor core, the length of a magnetic steel groove is greater than that of the magnetic steel, and an inward concave groove is formed between at least one end surface of the magnetic steel groove and the corresponding end surface of the magnetic steel; and in the step S2, filling sealant into the first gap and the groove, and enabling the outer surface of the sealant to be flush with the end surface of the rotor core. And the first gap and the groove are filled with the sealant, after the sealant is cured, the curing adhesive in the groove and the first gap further fixes the end part of the magnetic steel on the inner wall surface of the magnetic steel groove, so that the bonding force between the magnetic steel and the magnetic steel groove is enhanced. In addition, the outer surface of the sealant is flush with the end face of the rotor core, so that the appearance of the rotor structure is more attractive.
5. According to the method for fixing the magnetic steel, the sealant is quick-drying glue which is quickly condensed and solidified at normal temperature, the quick-drying glue can be quickly solidified only by pouring the quick-drying glue on the end face of the magnetic steel, the two end parts of the magnetic steel groove are sealed, a required anaerobic environment is formed, and the solidification speed of the anaerobic glue is further accelerated.
6. According to the method for fixing the magnetic steel, the quick-drying glue is the UV glue, and after the sealant is poured on the end faces of the two end portions of the magnetic steel in the step S2, the method further comprises the step of irradiating the UV glue by using ultraviolet light to enable the UV glue to be cured. The UV glue is preferably adopted as the quick-drying glue, so that the curing speed is high on one hand, and the cost is low on the other hand, and the cost required by the magnetic steel fixing method is low.
7. The rotor assembly provided by the invention comprises a rotor core, magnetic steel, anaerobic adhesive and a sealing element, wherein the rotor core is provided with an inner hole and at least two magnetic steel grooves with even number along the axial direction of the rotor core, and the magnetic steel grooves are symmetrically distributed on the periphery of the inner hole around the circumferential end surface of the rotor core; the magnetic steels correspond to the magnetic steel grooves one by one and are suitable for being embedded into the magnetic steel grooves; the anaerobic adhesive is arranged between the side wall surface of the magnetic steel and the inner wall surface of the magnetic steel groove and is used for fixing the magnetic steel and the magnetic steel groove; and the sealing elements are arranged on the two end parts of the magnetic steel, and the sealing elements and the magnetic steel groove enclose a closed space in which the anaerobic adhesive and the magnetic steel are sealed.
The rotor subassembly of this structure sets up the sealing member on the both ends of magnet steel, and the sealing member encloses into the enclosure space with the magnet steel groove, and this enclosure space separates with the external world, and anaerobism glue all is located this enclosure space with the magnet steel, then the anaerobism glue just can solidify rapidly in this enclosure space, and it is fixed to bond magnet steel and magnet steel groove, ensures the fastness that bonds between magnet steel and the magnet steel groove. Meanwhile, the two end parts of the magnetic steel are limited in the magnetic steel groove by the sealing element, so that the bonding performance between the magnetic steel and the magnetic steel groove is further improved.
8. According to the rotor assembly provided by the invention, the length of the magnetic steel is smaller than that of the magnetic steel groove, and an inwards concave groove is formed between at least one end face of the magnetic steel groove and the corresponding end face of the magnetic steel; at least one sealing member embedding recess, because form the recess between at least one end in magnet steel groove and the magnet steel to in this recess of sealing member embedding, the sealing member of being convenient for is installed on the tip of magnet steel, and in the sealing member embedding recess, the fastness of being connected between magnet steel and the magnet steel groove can be strengthened as the connecting piece to the sealing member itself.
9. According to the rotor assembly provided by the invention, the length of the anaerobic adhesive is smaller than that of the magnetic steel, an annular gap is formed between the side wall surface of at least one end of the magnetic steel and the inner wall surface of the magnetic steel groove, and the sealing element is suitable for entering the annular gap and surrounding the end part of the magnetic steel in the annular gap. Annular gap's setting for in the sealing member inserts annular gap, with the air escape in this annular gap, form anaerobic environment, accelerate the solidification speed of anaerobism glue, the sealing member of being convenient for simultaneously is installed on the tip of magnet steel, and the part itself that the sealing member inserted in the annular gap is as the connecting piece, can strengthen the fastness of being connected between magnet steel and the magnet steel groove.
10. According to the rotor assembly provided by the invention, the sealing element is the sealing adhesive, the sealing adhesive is used as the sealing element, when the sealing adhesive enters the annular gap, air in the annular gap can be completely discharged, a closed oxygen-free environment is formed by the sealing adhesive and the magnetic steel groove after the sealing adhesive is cured, the sealing performance of a closed space is ensured, the curing speed of anaerobic adhesive is further accelerated, and meanwhile, the sealing adhesive enters the annular gap and is used as an adhesive, so that the firmness of bonding between the magnetic steel and the magnetic steel groove can be enhanced.
11. The motor provided by the invention comprises the rotor assembly, and the motor adopts the rotor assembly, so that the bonding performance between the magnetic steel and the magnetic steel groove in the rotor assembly is firm, and the working performance of the motor is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a rotor core and magnetic steel in the prior art;
FIG. 2 is an exploded view of a rotor assembly provided in an embodiment of the present invention;
fig. 3 is a schematic longitudinal sectional view (provided with a sealing member) of the rotor core and the magnetic steel after assembly according to the embodiment of the present invention;
fig. 4 is a schematic longitudinal sectional view (with a seal removed) of the rotor core and the magnetic steel after assembly according to the embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 3;
fig. 6 is an assembly perspective view of a rotor core after magnetic steel is installed in a magnetic steel slot according to an embodiment of the present invention;
description of reference numerals: 1-a rotor core; 11-magnetic steel grooves; 12-an inner bore; 2-magnetic steel; 3-anaerobic adhesive; 4-a seal; 5-an annular gap; 6-groove.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a method for fixing magnetic steel, wherein, along the axial direction of a rotor core 1, the length of a magnetic steel slot 11 is greater than that of a magnetic steel 2, and the method comprises the following steps:
s1: embedding the magnetic steel 2 into a magnetic steel groove 11 of the rotor core 1, wherein concave grooves 6 are respectively formed between two end faces of the magnetic steel groove 11 and end faces corresponding to two ends of the magnetic steel 2, preferably the depths of the two grooves 6 are consistent, for example, the depth of the groove 6 is preferably 1 mm;
injecting anaerobic adhesive 3, for example, preferably loctite 545 anaerobic adhesive, into a gap formed between the side wall surface of the magnetic steel 2 and the inner wall surface of the magnetic steel slot 11, wherein the length of the coated anaerobic adhesive 3 after the magnetic steel 2 is in place is smaller than that of the magnetic steel 2 along the axial direction of the rotor core 1, so that a first gap is formed between the side wall surfaces at the two ends of the magnetic steel 2 and the inner wall surface of the magnetic steel slot 11;
s2: fill UV earlier and glue in to first clearance, fill UV again and glue in the recess 6 with the magnet steel groove 11 both ends to make the surface that UV glued and rotor core 1's terminal surface parallel and level, and make UV glue solidification with ultraviolet irradiation simultaneously, the UV after the solidification glues 3 with the external isolation of anaerobism glue in the magnet steel groove 11, 3 solidifications of anaerobism glue are with magnet steel 2 and magnet steel groove 11 bonding fixed.
The method for fixing the magnetic steel in the embodiment includes the steps that the magnetic steel 2 is inserted into a magnetic steel groove 11, most of air in the magnetic steel groove 11 is discharged out of the magnetic steel groove 11, then anaerobic adhesive 3 is injected into a gap formed between the side wall surface of the magnetic steel 2 and the inner wall surface of the magnetic steel groove 11, the air in the gap is discharged out of the magnetic steel groove 11, the anaerobic adhesive 3 pre-bonds the side wall surface of the magnetic steel 2 and the inner wall surface of the magnetic steel groove 11, then UV (ultraviolet) adhesive is filled into the first gap, all the air in the first gap is discharged, the UV adhesive is rapidly cured, so that the first gap does not contain air, a closed environment is formed, the anaerobic adhesive 3 is rapidly cured in the closed environment, and the magnetic steel 2 and the magnetic steel groove 11 are firmly bonded; meanwhile, after the first gap is filled with the UV glue, the groove 6 is filled with the UV glue, the UV glue in the first gap and the groove 6 is solidified and then is used as an adhesive, two end parts of the magnetic steel 2 are further bonded and fixed on the inner wall surface of the magnetic steel groove 11, the time for fixing the magnetic steel 2 in the magnetic steel groove 11 is shortened, and the production efficiency is improved.
As an alternative embodiment of the UV glue, the UV glue may be replaced by an instant glue 403, an instant glue 406, an instant glue 410, an instant glue 414, etc., and the time for setting and curing is usually within a few seconds, or other instant glues that are set and cured rapidly at normal temperature in the prior art, or other sealants in the prior art, as long as the sealant is poured on the end surfaces of the two ends of the magnetic steel 2, and after curing, the sealant forms a closed space with the magnetic steel slot 11, so that the anaerobic glue 3 can be cured rapidly in an oxygen-free environment, and the magnetic steel 2 and the magnetic steel slot 11 are bonded firmly. In addition, it should be noted that the UV glue may be cured only by ultraviolet irradiation, and other sealants may be cured under adaptively increased sealant curing conditions according to their own performance, and if the sealant may be cured without special conditions, the sealant may be poured onto both end portions of the magnetic steel 2.
As a modification of the anaerobic adhesive 3, in addition to the loctite 545 anaerobic adhesive given above, other anaerobic adhesives 3 in the prior art such as 6.9 anaerobic adhesive, 680 anaerobic adhesive, 638 anaerobic adhesive, etc. may be used, and the specific type of the anaerobic adhesive is determined according to the actual use situation.
As an alternative implementation manner of the step S2, in the step S2, the first gap is filled with UV glue, and then the grooves 6 at the two ends of the magnetic steel slot 11 are filled with UV glue, so that the outer surface of the UV glue injected into the grooves 6 may not be flush with the end surface of the rotor core 1, may protrude out of the grooves 6, or may not fill the grooves 6, and only the injected sealant may form a closed space in the magnetic steel slot 11, so that the anaerobic glue 3 is isolated from the outside.
As an alternative embodiment of the step S1, in the step S1, an inwardly recessed groove 6 is formed between one end surface of the magnetic steel groove 11 and the corresponding end surface of the magnetic steel 2, and the other end is flush with the corresponding other end surface of the magnetic steel 2, at this time, a sealant is poured onto the groove 6 and the other end surface of the magnetic steel 2, the groove 6 is filled with the sealant, and the sealant with a required thickness is poured onto the other end surface of the magnetic steel 2, so that the two end portions of the magnetic steel groove 11 are sealed to form a sealed space.
As an alternative embodiment of the step S1, in the step S1, the length of the coated anaerobic adhesive 3 after the magnetic steel 2 is in place is smaller than the length of the magnetic steel 2, a first gap may be formed between the side wall surface of one end of the magnetic steel 2 and the inner wall surface of the magnetic steel tank 11, and the other end of the coated anaerobic adhesive 3 is flush with the end surface of the anaerobic adhesive 3 after being in place, and only the air at the two ends of the anaerobic adhesive 3 after being in place in the magnetic steel tank 11 needs to be exhausted to form an oxygen-free environment, so as to promote the rapid curing of the anaerobic adhesive 3.
As a further alternative embodiment, the first gap may not be provided, and the length of the anaerobic adhesive 3 after being in place is the same as the length of the magnetic steel 2, and the sealant may be directly poured into the grooves 6 at the two ends of the magnetic steel groove 11.
As a further alternative embodiment, the groove 6 may not be provided, the lengths of the magnetic steel groove 11 and the magnetic steel 2 are kept consistent, in step S1, after the magnetic steel 2 is inserted into the magnetic steel groove 11, the anaerobic adhesive 3 is directly injected into the gap between the magnetic steel groove 11 and the side wall surface of the magnetic steel 2, and then the sealant is directly poured onto the end surfaces of the two end portions of the magnetic steel 2, the sealant is cured to isolate the anaerobic adhesive 3 in the magnetic steel groove 11 from the outside, and the anaerobic adhesive 3 is cured to bond and fix the magnetic steel 2 and the magnetic steel groove 11.
For example, when the anaerobic adhesive 3 is directly injected into the gap between the magnetic steel slot 11 and the side wall surface of the magnetic steel 2, a part of the sealant is injected onto the end surface of the rotor core 1, the end surface of the rotor core 1 and the end surface of the magnetic steel 2 are hermetically bonded to form a closed environment in the magnetic steel slot 11, and the anaerobic adhesive 3 is rapidly cured in the closed environment.
In a preferred embodiment, in the step S1, it is preferable that the magnetic steel 2 is inserted into the magnetic steel slot 11 at a predetermined position by using an existing tool, or the magnetic steel 2 is inserted into the magnetic steel slot 11 by other means or manually. Meanwhile, the anaerobic adhesive 3 is preferably injected into a gap between the side wall surface of the magnetic steel 2 and the inner wall surface of the magnetic steel groove 11 by using a needle tube according to the required amount, so that the injection amount of the anaerobic adhesive 3 is conveniently controlled. As a modification, other injection devices or coating devices in the prior art can be adopted, and the anaerobic adhesive 3 is injected into the gap between the side wall surface of the magnetic steel 2 and the magnetic steel groove 11.
In addition, as for the depth of the groove 6, the depth of the groove 6 can also be 0.5mm, 0.6mm, 0.8mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, etc., and the depth of the groove 6 is determined according to the actual use situation. Similarly, the length of the first gap is preferably 1mm, or 0.5mm, 1.5mm, etc., and the specific set length is also required according to the actual use situation.
Example 2
This embodiment provides a method for fixing magnetic steel 2, which is different from the method for fixing magnetic steel 2 provided in embodiment 1 only in that the step S1 is changed to: anaerobic adhesive 3 is coated on the inner wall surface of the magnetic steel groove 11 of the rotor core 1, and then the magnetic steel 2 is embedded into the preset position in the magnetic steel groove 11.
According to the fixing method, the needed anaerobic adhesive 3 is firstly coated in the magnetic steel groove 11, then the magnetic steel 2 is inserted into the magnetic steel groove 11, and then the sealant is poured on the end faces of the two end parts of the magnetic steel 2, so that a closed environment is formed in the magnetic steel groove 11, the anaerobic adhesive 3 is promoted to be rapidly solidified in the closed environment, and the magnetic steel 2 and the magnetic steel groove 11 are bonded and fixed.
As an alternative to the step of S1, the step of S1 is changed to: anaerobic adhesive 3 is coated on the side wall surface of the magnetic steel 2, and then the magnetic steel 2 is embedded into a preset position in the magnetic steel groove 11. Or, the anaerobic adhesive 3 is coated on the side wall surface of the magnetic steel 2, the anaerobic adhesive 3 is coated on the inner wall surface of the magnetic steel groove 11, and the magnetic steel 2 is embedded into the magnetic steel groove 11, so that the spraying speed of the anaerobic adhesive 3 is increased, and the working efficiency of fixing the magnetic steel 2 on the magnetic steel groove 11 is further improved.
Example 3
The present embodiment provides a rotor assembly, as shown in fig. 2, 3 and 6, including a rotor core 1, magnetic steel 2, an anaerobic adhesive 3 and two sealing adhesives. Wherein,
an inner hole 12 and six magnetic steel grooves 11 are formed in the rotor core 1 along the axial direction of the rotor core, and the six magnetic steel grooves 11 are symmetrically distributed on the periphery of the inner hole 12 around the circumferential end face of the rotor core 1;
the magnetic steels 2 correspond to the magnetic steel grooves 11 one by one and are suitable for being embedded into the magnetic steel grooves 11, the length of the magnetic steels 2 is smaller than that of the magnetic steel grooves 11, and inwards-concave grooves 6 are respectively formed between the end surfaces of the two ends of the magnetic steel grooves 11 and the corresponding end surfaces of the two ends of the magnetic steels 2, as shown in fig. 4;
the anaerobic adhesive 3 is arranged between the side wall surface of the magnetic steel 2 and the inner wall surface of the magnetic steel groove 11 and is used for fixing the magnetic steel 2 and the magnetic steel groove 11, the length of the anaerobic adhesive 3 is smaller than that of the magnetic steel 2, and annular gaps 5 are formed between the side wall surfaces at two ends of the magnetic steel 2 and the inner wall surface of the magnetic steel 2 respectively, as shown in fig. 5;
the two sealants are respectively embedded into the two grooves 6 and enter the annular gap 5, the sealant surrounds the end part of the magnetic steel 2 in the annular gap and forms a closed space with the magnetic steel groove 11 to seal the anaerobic adhesive 3 in the closed space,
the rotor subassembly of this embodiment, adopt 3 fixed connection of anaerobic adhesive between magnet steel 2 and the magnet steel groove 11, set up sealed glue in the recess 6 on the 11 both ends in magnet steel groove, and sealed glue gets into annular gap 5 in, seal annular gap 5, make the interior closed environment that forms of magnet steel groove 11, anaerobic adhesive 3 and magnet steel 2 all are in this closed environment, 3 rapid solidification of anaerobic adhesive in this closed environment, accelerate the bonding speed between magnet steel 2 and the magnet steel groove 11, and then improve the adhesion performance between magnet steel 2 and the magnet steel groove 11.
The anaerobic adhesive 3 is preferably a le tai 545 anaerobic adhesive, and may be other anaerobic adhesives 3 in the prior art such as 6.9 anaerobic adhesive, 680 anaerobic adhesive, 638 anaerobic adhesive, and the like, and the specific anaerobic adhesive is determined according to the actual use condition.
Preferably, the sealant is UV glue, or instant glue such as instant glue 403, instant glue 406, instant glue 410, instant glue 414, or other sealants in the prior art, or a sealing element 4 in the prior art, and only needs to be arranged in the grooves 6 at the two end parts of the magnetic steel slot 11, and the sealing element and the magnetic steel slot 11 enclose a closed space in which the anaerobic glue 3 and the magnetic steel 2 are sealed.
As an alternative embodiment, the annular gap 5 between the side wall surface of one end of the magnetic steel 2 and the inner wall surface of the magnetic steel groove 11 may be only used, and the side wall surface of the other end is fixed on the inner wall surface of the magnetic steel groove 11 through the anaerobic adhesive 3, at this time, the sealing element 4 located on one side of the annular gap 5 enters the annular gap 5, and the sealing element 4 located on one side far away from the annular gap 5 only needs to be embedded into the groove 6. Or, as a deformation, the annular gap 5 may not be provided, the length of the anaerobic adhesive 3 is consistent with that of the magnetic steel 2, and only the sealing element 4 needs to be embedded into the grooves 6 at the two ends of the magnetic steel groove 11 to seal the two ends of the magnetic steel groove 11, so as to form a closed space.
As a further alternative embodiment, an inwardly recessed groove 6 is formed between the end face of one end of the magnetic steel slot 11 and the corresponding end face of the magnetic steel 2, one seal 4 is embedded in the groove 6, and the other seal 4 is directly disposed on the end of the magnetic steel 2. Or, as a deformation, the two grooves 6 may not be provided, the length of the magnetic steel 2 is consistent with that of the magnetic steel groove 11, and only the sealing elements 4 are respectively arranged on the two end portions of the magnetic steel 2, and a closed space for sealing the anaerobic adhesive 3 and the magnetic steel 2 is enclosed between the sealing elements 4 and the magnetic steel groove 11. For example, the seal 4 is provided on the end portion of the magnetic steel 2, and the seal 4 extends outward toward the end face of the rotor core 1 in the radial direction of the rotor core 1, thereby forming the above-described closed space.
As an alternative to the number of the magnetic steel grooves 11, the number of the magnetic steel grooves 11 may also be an even number of two, four, eight, ten, and so on, and correspondingly, the number of the magnetic steels 2 is also an even number of two, four, eight, ten, and so on. That is, the number of magnet steel 2 and magnet steel groove 11 one-to-one, the number of magnetic field groove be two at least and be the even number, specifically set up magnet steel groove 11 and installation magnet steel 2's number on rotor core 1, need be according to actual use condition and decide.
In a preferred embodiment, the depth of the groove 6 may be 0.5mm, 0.6mm, 0.8mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, etc., and the depth of the groove 6 is determined according to the actual use situation. Similarly, as for the length of the annular gap 5, the annular gap 5 is preferably 1mm, or 0.5mm, 1.5mm, etc., and the specific set length is also required according to the actual use situation.
In addition, in the rotor assembly provided in the present embodiment, the magnetic steel 2 is preferably fixed in the magnetic steel slot 11 by using the method for fixing the magnetic steel 2 provided in embodiment 1 or embodiment 2. As a modification, other methods in the prior art may be adopted, and the anaerobic adhesive 3 and the sealing member 4 may be respectively disposed between the magnetic steel 2 and the magnetic steel groove 11 and on both end portions of the magnetic steel 2, so as to form the above-mentioned closed space.
Example 4
The present embodiment provides an electric machine including the rotor assembly provided in embodiment 3.
The motor in this embodiment, owing to adopt the rotor subassembly that provides in embodiment 3 for the adhesion performance between magnet steel 2 and the magnet steel groove 11 in the rotor subassembly is firm, improves the working property of motor.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. A method for fixing magnetic steel is characterized by comprising the following steps:
s1: coating anaerobic adhesive (3) on the inner wall surface of a magnetic steel groove (11) of a rotor iron core (1) and/or the side wall surface of magnetic steel (2), and embedding the magnetic steel (2) into a preset position in the magnetic steel groove (11); or embedding the magnetic steel (2) into a magnetic steel groove (11) of the rotor core (1), and injecting anaerobic adhesive (3) into a gap formed between the side wall surface of the magnetic steel (2) and the inner wall surface of the magnetic steel groove (11);
s2: pouring quick-drying glue which is rapidly solidified at normal temperature into the end faces of the two end parts of the magnetic steel (2); the curing speed of the quick-drying adhesive is higher than that of the anaerobic adhesive, the anaerobic adhesive (3) in the magnetic steel groove (11) is isolated from the outside through curing of the quick-drying adhesive, and the magnetic steel (2) is fixedly bonded with the magnetic steel groove (11) through curing of the anaerobic adhesive (3).
2. A method of fixing magnetic steel according to claim 1, wherein: in the step S1, along the axial direction of the rotor core (1), the length of the coated anaerobic adhesive (3) after the magnetic steel (2) is in place is smaller than the length of the magnetic steel (2); and a first gap is formed between the side wall surface of at least one end of the magnetic steel (2) and the inner wall surface of the magnetic steel groove (11).
3. A method of fixing magnetic steel according to claim 2, wherein: in the step S2, the quick-drying adhesive is filled into the first gap, and then the quick-drying adhesive is poured into the end faces of the two end portions of the magnetic steel (2).
4. A method of fixing magnetic steel according to claim 2 or 3, wherein: along the axial direction of the rotor core (1), the length of the magnetic steel groove (11) is greater than that of the magnetic steel (2), and an inward concave groove (6) is formed between at least one end face of the magnetic steel groove (11) and the corresponding end face of the magnetic steel (2);
and in the step S2, filling the quick-drying glue in the first gap and the groove (6) and enabling the outer surface of the quick-drying glue to be flush with the end surface of the rotor core (1).
5. A method of fixing magnetic steel according to any one of claims 1 to 3, wherein: the quick-drying glue is UV glue, and the step of curing the UV glue by irradiating the UV glue with ultraviolet light after the quick-drying glue is poured on the end faces of the two end parts of the magnetic steel (2) in the step of S2 is also included.
6. A rotor assembly, comprising
The rotor core (1) is provided with an inner hole (12) and at least two magnetic steel grooves (11) which are even number along the axial direction, and the magnetic steel grooves (11) are symmetrically distributed on the periphery of the inner hole (12) around the circumferential end surface of the rotor core (1);
the magnetic steels (2) correspond to the magnetic steel grooves (11) one by one and are suitable for being embedded into the magnetic steel grooves (11);
anaerobic adhesive (3) is arranged between the side wall surface of the magnetic steel (2) and the inner wall surface of the magnetic steel groove (11) and is used for fixing the magnetic steel (2) and the magnetic steel groove (11); and is
Sealing elements are respectively arranged at two end parts of the magnetic steel (2), the sealing elements are quick-drying glue, the curing speed of the quick-drying glue is higher than that of the anaerobic glue, and the sealing elements (4) and the magnetic steel grooves (11) enclose a closed space in which the anaerobic glue (3) and the magnetic steel (2) are sealed.
7. The rotor assembly of claim 6, wherein: the length of the magnetic steel (2) is smaller than that of the magnetic steel groove (11), and an inward concave groove (6) is formed between at least one end face of the magnetic steel groove (11) and the corresponding end face of the magnetic steel (2);
at least one of the seals (4) is embedded in the groove (6).
8. The rotor assembly of claim 6 or 7, wherein: the length of the anaerobic adhesive (3) is less than that of the magnetic steel (2), an annular gap (5) is formed between the side wall surface of at least one end of the magnetic steel (2) and the inner wall surface of the magnetic steel groove (11),
the seal (4) is adapted to enter into the annular gap (5) and enclose the end of the magnet steel (2) therein.
9. An electrical machine comprising a rotor assembly, wherein the rotor assembly is as claimed in any one of claims 6 to 8.
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| CN107482814B (en) * | 2017-08-07 | 2020-11-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor, motor, compressor and air conditioner |
| CN107425632A (en) * | 2017-09-14 | 2017-12-01 | 新誉轨道交通科技有限公司 | High speed permanent magnet motor rotor and high-speed permanent magnet motor |
| CN107994738A (en) * | 2017-12-11 | 2018-05-04 | 宁波韵升股份有限公司 | A kind of bonding magnetic steel method of rotor assembly |
| CN109245364A (en) * | 2018-11-02 | 2019-01-18 | 珠海凌达压缩机有限公司 | Motor rotor structure and motor |
| CN111371265B (en) * | 2020-02-27 | 2021-08-24 | 北京动力源新能源科技有限责任公司 | Manufacturing method of embedded permanent magnet motor rotor |
| WO2021242187A1 (en) * | 2020-05-27 | 2021-12-02 | Vansan Maki̇na Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ | Wet rotor with magnet for submersible pump motor |
| CN113803333A (en) * | 2020-06-11 | 2021-12-17 | 中国商用飞机有限责任公司 | Assembly method of shaft piece and mounting seat, shaft piece assembly and bushing assembly |
| EP4425754A1 (en) * | 2023-03-03 | 2024-09-04 | Siemens Aktiengesellschaft | Permanent magnet and method for manufacturing rotor of dynamo-electric machine using such permanent magnets |
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