CN111342581B - Magnetic pole protection structure, rotor, motor and rotor installation method - Google Patents
Magnetic pole protection structure, rotor, motor and rotor installation method Download PDFInfo
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- CN111342581B CN111342581B CN202010251188.2A CN202010251188A CN111342581B CN 111342581 B CN111342581 B CN 111342581B CN 202010251188 A CN202010251188 A CN 202010251188A CN 111342581 B CN111342581 B CN 111342581B
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- 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
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- 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
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- 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
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a magnetic pole protection structure, a rotor, a motor and a rotor installation method, wherein the magnetic pole protection structure is applied to magnetic poles, the magnetic poles are in multiple rows, the magnetic poles are arranged at intervals along the circumferential direction of a rotor magnetic yoke, an unshielded axial channel is formed between two adjacent rows of the magnetic poles, and the magnetic pole protection structure comprises: the magnetic pole guard bands are arranged at intervals along the circumferential direction of the rotor magnetic yoke; each magnetic pole guard band is buckled on a row of magnetic poles, and two ends of each magnetic pole guard band are fixed on the magnetic yoke of the rotor by adopting fixing pieces respectively, so that each magnetic pole guard band is abutted with the magnetic poles. The invention simultaneously enlarges the gap of the magnetic pole in the circumferential direction of the rotor, increases the ventilation of the axial wind path of the rotor, reduces the temperature rise of the motor, improves the efficiency and the generating capacity of the motor, further reduces the effective material consumption of the motor, and brings the benefits of cost reduction and efficiency improvement for the motor.
Description
Technical Field
The invention relates to the technical field of wind driven generators, in particular to a magnetic pole protection structure, a rotor, a motor and a rotor installation method.
Background
The rotor magnetic pole of the generator of the large-scale wind turbine generator set can be fixed on the surface of the rotor bracket in various ways, wherein one important fixing way is a surface-mounted magnetic pole fixing way. In the surface-mount magnetic pole fixing method, magnetic steel is usually fixed to the surface of a rotor yoke by resin bonding. The technical process of the surface-mounted magnetic pole fixing mode is generally divided into two types: one is that the magnetic steel is firstly magnetized and then assembled and fixed on a rotor magnetic yoke; the other type is that the magnetic steel is not magnetized, assembled and fixed on a magnetic yoke of the rotor, and then the magnetic pole of the rotor is magnetized integrally. However, for the generator of a large-scale wind turbine generator, the whole magnetization of the rotor is difficult to realize at present; and for the scheme of directly assembling the magnetizing magnetic steel, the fixing piece is required to be fixed on the surface of the magnetic yoke in advance, and the magnetic steel is ensured to be pushed, released and fixed along a fixed track.
Referring to fig. 1 to 3, a plurality of rows of first mounting holes 50 are formed in a mounting surface of a rotor yoke 40, and a conventional magnetic pole process fixing member is a guide bar 20 having a plurality of second mounting holes corresponding to the first mounting holes 50; before the magnetizing magnetic steel 10 is installed, the guide strips 20 are fixed on the rotor magnetic yoke 40 by penetrating through the second installation hole and the first installation hole 50 corresponding to the second installation hole through the screws 30, then a gap for accommodating the magnetizing magnetic steel 10 is formed between every two adjacent guide strips 20, the corresponding magnetizing magnetic steel 10 is pushed into the gap by adopting an installation method of directly pushing and releasing the magnetizing magnetic steel 10, and the magnetizing magnetic steels 10 in each row of gaps form a magnetic pole. As shown in fig. 3, after all the magnetizing magnetic steels 10 are assembled to form magnetic poles, the magnetic pole process fixing member (i.e., the guide bar 20) is not detached, and functions to fix the magnetizing magnetic steels 10. However, the installation mode can obstruct axial ventilation of the rotor, reduce the ventilation volume of the axial wind path of the rotor, and have adverse effects on heat dissipation of the magnetic steel, the rotor magnet yoke and the whole motor, so that the temperature rise of the motor is high, the efficiency is reduced, the generated energy is reduced, and the problem that the cost of the motor is increased due to the increase of the effective material consumption of the motor for reducing the temperature rise is caused.
Disclosure of Invention
The invention aims to provide a magnetic pole protection structure, a rotor, a motor and a rotor installation method, which are used for solving the problems of small axial ventilation of the existing rotor, poor heat dissipation of the rotor and increased manufacturing cost of the motor.
In order to solve the problems, the invention is realized by the following technical scheme:
a magnetic pole protection structure is applied to magnetic poles, the magnetic poles are in multiple rows, and the multiple rows of magnetic poles are arranged at intervals along the circumferential direction of a rotor magnetic yoke; two adjacent lines form the axial passageway of no sheltering from between the magnetic pole, magnetic pole protective structure includes: the magnetic pole guard bands are arranged at intervals along the circumferential direction of the rotor magnetic yoke; each magnetic pole protective belt is buckled on a row of magnetic poles,
and two ends of each magnetic pole guard band are respectively fixed on the magnetic yoke of the rotor by adopting a fixing piece, so that each magnetic pole guard band is abutted with the magnetic pole.
Preferably, two ends of each magnetic pole protective belt are respectively provided with a folded edge, and the extending directions of the two folded edges are opposite.
Preferably, the fixing member includes: a plurality of pairs of non-magnetic stop blocks and a plurality of bolts; each non-magnetic-conductive block is provided with a mounting hole, each pair of non-magnetic-conductive blocks is respectively and correspondingly arranged on the two folded edges of the magnetic pole protective belt,
and the bolt penetrates through the mounting hole and the folded edge to fix the magnetic pole protective belt on the rotor magnetic yoke.
Preferably, each row of the magnetic poles comprises a plurality of magnetizing magnetic steels, and the width of the magnetic pole guard band is equal to or smaller than that of the magnetizing magnetic steels.
Preferably, the height of the magnetic pole guard strip is less than the thickness of the magnetic pole.
Preferably, the method further comprises the following steps: and the glass fiber resin layer covers the surface of the rotor magnetic yoke, all the magnetic poles, all the magnetic pole protective belts and all the fixing pieces.
Preferably, the magnetic pole protective band is made of a non-magnetic conductive material.
Preferably, the magnetic pole protective belt is a whole pole stainless steel belt or a segmented magnetic pole stainless steel belt.
Preferably, each magnetic pole guard band is provided with a plurality of openings.
In another aspect, the present invention also provides a rotor, comprising: a rotor yoke; the magnetic poles are arranged at intervals along the circumferential direction of the rotor magnetic yoke, and an unshielded axial channel is formed between two adjacent rows of the magnetic poles; and a pole guard structure as described above.
In a further aspect, the invention also provides an electric machine comprising a rotor and a stator as described above, the rotor being arranged coaxially with the stator.
In other aspects, the present invention also provides a method for mounting a rotor, including:
step S1, pre-fixing magnetic pole process fixing pieces on the mounting surface of the rotor magnetic yoke, wherein two adjacent magnetic pole process fixing pieces form a magnetic pole guide passage;
step S2: a plurality of magnetizing magnetic steels are correspondingly pushed into the magnetic pole guide passages by adopting an installation method of directly pushing and releasing the magnetizing magnetic steels, and a plurality of magnetizing magnetic steels in each row of magnetic pole guide passages form a row of magnetic poles;
step S3, disassembling all the magnetic pole process fixing pieces, and forming an unshielded axial channel between two adjacent rows of magnetic poles;
step S4, correspondingly buckling all the magnetic pole guard bands on the magnetic poles, and fixing two ends of each magnetic pole guard band on the rotor magnetic yoke by adopting a fixing piece; the magnetic pole protective belt is abutted to the magnetic pole.
Preferably, each magnetizing magnetic steel has a preset position, and the central point of each preset position is coaxial with the central point of the magnetizing magnetic steel located at the preset position; the step S2 includes:
s2.1, point-coating quick-drying structural adhesive at the central point of the preset position of the first magnetizing magnetic steel, and pushing the first magnetizing magnetic steel to the preset position along the magnetic pole guide passage;
s2.2, point-coating quick-drying structural adhesive at the central point of the preset position of the second magnetizing magnetic steel, pushing the second magnetizing magnetic steel to the preset position along the magnetic pole guide passage, and adhering and pre-fixing the second magnetizing magnetic steel; and the rest is done in sequence until the magnetizing magnetic steel is bonded and pre-fixed to form a magnetic pole.
Preferably, the central point of the preset position is an intersection point of a central line and an axial central line of the circumferential direction to which the magnetizing magnetic steel located at the preset position belongs.
Preferably, before executing the step S4, the method further includes: and paving glass fiber cloth on the surface of the rotor magnetic yoke and all the magnetic poles, infiltrating the surfaces of all the magnetic poles through a resin vacuum introduction process, and combining the glass fiber cloth with the magnetic yoke to form a glass fiber resin layer so as to seal all the magnetic poles.
Preferably, after the step S4 is executed, the method further includes: and paving glass fiber cloth on the surface of the magnetic yoke of the rotor, all the magnetic poles, the magnetic pole protective belts and the fixing pieces, infiltrating the surfaces of all the magnetic poles through a resin vacuum introduction process, and combining with the glass fiber cloth to form a glass fiber resin layer so as to seal all the magnetic poles.
Preferably, the method further comprises the following steps: and performing penetrating pinhole detection on the whole range of the glass fiber resin layer by using an electric spark leak detector, and plugging the alarm position by using a hole sealing agent.
The invention has the following technical effects:
the invention provides a magnetic pole protection structure which is applied to magnetic poles, wherein the magnetic poles are in multiple rows, and the multiple rows of magnetic poles are arranged at intervals along the circumferential direction of a rotor magnetic yoke; two adjacent lines form the axial passageway that does not have the sheltering from between the magnetic pole, magnetic pole protective structure includes: the magnetic pole guard bands are arranged at intervals along the circumferential direction of the rotor magnetic yoke; each magnetic pole protective belt is buckled on a row of magnetic poles,
and two ends of each magnetic pole guard band are respectively fixed on the magnetic yoke of the rotor by adopting a fixing piece, so that each magnetic pole guard band is abutted with the magnetic pole. Therefore, the magnetic pole protective belt is adopted to fix the magnetic pole consisting of the plurality of magnetizing magnetic steels, and the magnetic pole protective belt is positioned above the magnetic pole, so that the gap between two adjacent magnetic poles forms the non-shielding axial channel, namely the axial ventilation path of the rotor, and further, due to the existence of the non-shielding axial channel, the gap of the magnetic pole in the circumferential direction of the rotor is enlarged, the ventilation quantity of the axial ventilation path of the rotor is increased, the temperature rise of the motor is reduced, the efficiency and the power generation quantity of the motor are improved, the effective material consumption of the motor is further reduced, and the purposes of reducing cost and increasing efficiency are brought to the motor.
The magnetic pole protective belt is in interference contact with the magnetizing magnetic steel, namely is abutted to the magnetic pole, and the purpose of reinforcing the magnetic pole can be achieved. In order to achieve the above purpose, the height of the magnetic pole protective belt is designed to be slightly smaller than the thickness of the magnetic pole, so as to ensure that the magnetic pole can be tensioned after the magnetic pole protective belt is fastened, and the magnetic pole can be effectively fixed.
The invention provides a method for mounting a rotor, which comprises the following steps of S1, pre-fixing magnetic pole process fixing pieces on a mounting surface of a rotor magnetic yoke, wherein two adjacent magnetic pole process fixing pieces form a magnetic pole guide passage; step S2: a plurality of magnetizing magnetic steels are correspondingly pushed into the magnetic pole guide passages by adopting an installation method of directly pushing and releasing the magnetizing magnetic steels, and a plurality of magnetizing magnetic steels in each row of magnetic pole guide passages form a row of magnetic poles; step S3, disassembling all the magnetic pole process fixing pieces, and forming an unshielded axial channel between two adjacent rows of magnetic poles; (ii) a Step S4, correspondingly buckling all the magnetic pole guard bands on the magnetic poles, and fixing two ends of each magnetic pole guard band on the rotor magnetic yoke by adopting a fixing piece; the magnetic pole protective belt is abutted to the magnetic pole. Therefore, the rotor can be modified on the basis of the installation of the conventional magnetic pole process fixing piece, so that the preparation cost of the rotor can be saved, and the installation efficiency can be improved.
The installation method further comprises the following steps: and performing penetrating pinhole detection on the whole range of the glass fiber resin layer by using an electric spark leak detector, and plugging the alarm position by using a hole sealing agent. Therefore, the purpose that the glass fiber resin layer is completely sealed and has no defect to the magnetic pole is ensured, and the service life of the rotor or the motor is prolonged.
Drawings
FIG. 1 is a schematic diagram of a portion of a rotor yoke in the prior art;
FIG. 2 is a schematic view of a prior art partial rotor yoke with a pole process fixture installed;
FIG. 3 is a schematic structural diagram of a portion of a rotor yoke with magnetized magnetic steel installed therein in the prior art;
fig. 4 is a partial structural schematic view of a rotor yoke according to an embodiment of the present invention;
fig. 5 is a partial structural schematic view of a rotor yoke with a magnetic pole protection structure mounted thereon according to an embodiment of the present invention;
fig. 6 is a schematic partial perspective view of a rotor yoke with a magnetic pole protection structure mounted thereon according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a magnetic pole guard strip of a magnetic pole guard structure according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a non-magnetic stop of a magnetic pole protection structure according to an embodiment of the present invention;
fig. 9 is a schematic partial structure view of a magnetic pole protection structure according to another embodiment of the present invention.
Detailed Description
The following describes a magnetic pole protection structure, a rotor, a motor and a rotor installation method according to the present invention in further detail with reference to fig. 4 to 9 and the following embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
With reference to fig. 4 to 9, the magnetic pole protection structure provided in this embodiment is applied to magnetic poles, where the magnetic poles are arranged in multiple rows, and the multiple rows of magnetic poles are arranged at intervals along the circumferential direction of a rotor magnetic yoke; two adjacent lines form the axial passageway of no sheltering from between the magnetic pole, magnetic pole protective structure includes: a plurality of magnetic pole guard bands 300 arranged at intervals in the circumferential direction of the rotor yoke; each of the magnetic pole guard bands 300 is fastened to a row of magnetic poles, and both ends of each of the magnetic pole guard bands 300 are fixed to the rotor yoke 100 by fixing members, respectively, so that each of the magnetic pole guard bands 300 is abutted to the magnetic poles.
Specifically, in the rotor yoke 100 provided in this embodiment, a plurality of rows of first fixing holes 102 are provided on the mounting surface of the rotor yoke 100; second fixing holes 101 are respectively formed along the circumferential direction of the rotor yoke 100 and near to both ends of the rotor yoke 100; the first fixing hole 102 is used for installing a magnetic pole process fixing member for guiding as described in the background art. It should be noted that the pole technology attachment of the present invention will be removed later.
Preferably, as shown in fig. 7, in this embodiment, two ends of each magnetic pole guard band 300 are respectively provided with a folded edge 301, and the extending directions of the two folded edges 301 are opposite; a third fixing hole 302 is formed in each folded edge 301;
preferably, the fixing member includes: a plurality of pairs of non-magnetic stoppers 400 and a plurality of bolts 500; each non-magnetic-conductive block 400 is provided with a mounting hole 401, each pair of non-magnetic-conductive blocks 400 is respectively and correspondingly arranged on the two folding edges 301 of the magnetic pole protective belt 300,
the bolt 500 penetrates through the mounting hole 401, the third fixing hole 302 of the flange 301, and the second fixing hole 101 to fix the magnetic pole protective strip 300 to the rotor yoke 100.
Preferably, each row of the magnetic poles comprises a plurality of magnetizing magnetic steels 200, and the width of the magnetic pole guard band 300 is equal to or less than the width of the magnetizing magnetic steels 200. The length of the pole guard strip 300 is equal to the length of the column of poles. The height of the magnetic pole guard strip 300 is smaller than the thickness of the magnetic pole, namely slightly smaller than the thickness of the magnetizing magnetic steel 200, so that the magnetic pole can be pressed on the rotor yoke 100 through the magnetic pole guard strip 300, interference contact with the magnetic pole is realized, the stability of the magnetic pole is increased, and the displacement of the magnetic pole along the circumferential direction of the rotor yoke is reduced. The magnetic pole protective band 300 is elastic and stretchable; the height of the magnet in the non-stretched state is smaller than the thickness of the magnetizing magnetic steel 200.
Preferably, the method further comprises the following steps: a fiberglass resin layer (not shown) covering the surface of the rotor yoke 100, all the magnetic poles, all the magnetic pole shield tapes 300, and all the fixing pieces. In some other embodiments, the fiberglass resin layer may cover the surface of the rotor yoke 100 and all the magnetic poles, and the magnetic pole protective tape 300 is positioned over the fiberglass resin layer at the positions corresponding to the magnetic poles and fixes the magnetic poles. In this embodiment, the glass fiber resin layer includes glass fiber cloth and resin. The glass fiber cloth is Kevlar fiber cloth or carbon fiber cloth. In some other embodiments, the fiberglass cloth may also be other materials that can be infiltrated with the resin to form a glass-reinforced layer, which is not limited by the present invention.
Preferably, the magnetic pole protective strip 300 is prepared by a mold release process using a non-magnetic material. It is understood that the demolding process is a conventional preparation technique and is not described in detail herein.
Preferably, the magnetic pole protective band 300 is a full-pole stainless steel band or a segmented magnetic pole stainless steel band. The whole stainless steel strip is integrally arranged. The segmented magnetic pole stainless steel band comprises a plurality of sub-magnetic pole stainless steel bands, and then the sub-magnetic pole stainless steel bands are spliced into a whole by adopting a splicing process to form the segmented magnetic pole stainless steel band. Therefore, the segmented magnetic pole stainless steel band is convenient to prepare, namely the preparation requirement is low, and the preparation efficiency is high.
Preferably, as shown in fig. 9, in some other embodiments, each of the magnetic pole guard bands 300 is provided with a plurality of openings. The setting up of trompil has increased the cooling surface of magnetic pole, can further reduce rotor temperature rise or motor temperature rise, improves motor efficiency and generated energy, improves motor life, and can make the magnetic pole guard band with the magnet steel of magnetic pole is closely laminated more easily, strengthens consolidating the effect.
On the other hand, based on the same inventive concept, the present embodiment further provides a rotor, including: a rotor yoke; the magnetic poles are arranged at intervals along the circumferential direction of the rotor magnetic yoke, and an unshielded axial channel is formed between two adjacent rows of the magnetic poles; and a pole guard structure as described above.
In still another aspect, based on the same inventive concept, the present embodiment further provides an electric motor, including the rotor and the stator as described above, where the rotor and the stator are coaxially disposed.
In other aspects, based on the same inventive concept, the present embodiment further provides a method for mounting a rotor, including:
step S1, pre-fixing (specifically, pre-fixing may be performed by bolts) magnetic pole process fixing pieces on the mounting surface of the rotor yoke, where two adjacent magnetic pole process fixing pieces form a magnetic pole guide passage; the magnetic pole process fixing piece plays a role in guiding when the magnetizing magnetic steel is pushed and released in the follow-up process.
Step S2: and a plurality of magnetizing magnetic steels are correspondingly pushed into the magnetic pole guide passages by adopting an installation method of directly pushing and releasing the magnetizing magnetic steels, and a plurality of magnetizing magnetic steels in each row of magnetic pole guide passages form a row of magnetic poles.
Step S3, disassembling all the magnetic pole process fixing pieces, and forming an unshielded axial channel between two adjacent rows of magnetic poles; therefore, in the embodiment, the magnetic pole process fixing piece is removed on the basis of the prior art, and a non-shielding axial channel is formed at a position for accommodating the magnetic pole process fixing piece in an empty manner, so that the gap of the magnetic pole in the circumferential direction of the rotor (the rotor yoke 100) is increased, the ventilation volume of the axial wind path of the rotor is increased, the temperature rise of the motor is reduced, the efficiency and the power generation volume of the motor are improved, the effective material consumption of the motor is reduced, and the cost reduction and the efficiency improvement are brought to the motor.
Step S4, correspondingly buckling all the magnetic pole guard bands on the magnetic poles, and fixing two ends of each magnetic pole guard band on the rotor magnetic yoke by adopting a fixing piece; the magnetic pole protective belt is abutted to the magnetic pole. Thereby achieving an effective fixation of the magnetic poles.
Preferably, each row of magnetic poles comprises a plurality of magnetizing magnetic steels; each magnetizing magnetic steel is provided with a preset position, and the central point of each preset position is coaxial with the central point of the magnetizing magnetic steel positioned at the preset position; the step S2 includes: s2.1, point-coating quick-drying structural adhesive at the central point of the preset position of the first magnetizing magnetic steel, and pushing the first magnetizing magnetic steel to the preset position along the magnetic pole guide passage; in the process of pushing and releasing the first magnetizing magnetic steel, when the first magnetizing magnetic steel passes through the quick-drying structural adhesive, part of the quick-drying structural adhesive moves along with the first magnetizing magnetic steel and is filled in a gap between the first magnetizing magnetic steel and the surface of the rotor magnetic yoke, so that pre-bonding and fixing of the first magnetizing magnetic steel are realized. When the rotor is designed, a certain gap is required to be left between the surface of the magnetizing magnetic steel and the surface of the rotor magnetic yoke after the magnetizing magnetic steel is pushed, so that the quick-drying structural adhesive can be effectively filled into the gap between the magnetizing magnetic steel and the rotor magnetic yoke, and the effective pre-fixing of the magnetizing magnetic steel is realized.
S2.2, point-coating quick-drying structural adhesive at the central point of the preset position of the second magnetizing magnetic steel, pushing the second magnetizing magnetic steel to the preset position along the magnetic pole guide passage, and adhering and pre-fixing the second magnetizing magnetic steel; and the rest is done in sequence until the magnetizing magnetic steel is bonded and pre-fixed to form a magnetic pole.
Preferably, the central point of the preset position is an intersection point of a central line and an axial central line of the circumferential direction to which the magnetizing magnetic steel located at the preset position belongs. In this embodiment, when dispensing the quick-drying structural adhesive, the amount of the quick-drying structural adhesive to be dispensed needs to be controlled.
The position of dispensing the quick-drying structural adhesive needs to be ensured on the intersection point of the central line in the circumferential direction and the axial central line of each block of the magnetizing magnetic steel, so that the quick-drying structural adhesive is prevented from spreading to the surface of the magnetic pole process fixing piece in the pushing and releasing process of the magnetizing magnetic steel.
Preferably, before executing the step S4, the method further includes: and paving glass fiber cloth on the surface of the rotor magnetic yoke and all the magnetic poles, infiltrating the surfaces of all the magnetic poles through a resin vacuum introduction process, and combining the glass fiber cloth with the magnetic yoke to form a glass fiber resin layer so as to seal all the magnetic poles.
Preferably, after the step S4 is executed, the method further includes: and paving glass fiber cloth on the surface of the magnetic yoke of the rotor, all the magnetic poles, the magnetic pole protective belts and the fixing pieces, infiltrating the surfaces of all the magnetic poles through a resin vacuum introduction process, and combining with the glass fiber cloth to form a glass fiber resin layer so as to seal all the magnetic poles.
Preferably, the method further comprises the following steps: and performing penetrating pinhole detection on the whole range of the glass fiber resin layer by using an electric spark leak detector, and plugging the alarm position by using a hole sealing agent.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (15)
1. A magnetic pole protection structure is applied to magnetic poles, the magnetic poles are in multiple rows, and the multiple rows of magnetic poles are arranged at intervals along the circumferential direction of a rotor magnetic yoke; it is characterized in that two adjacent columns of the magnetic poles form an unshielded axial channel therebetween, and the magnetic pole protection structure comprises: the magnetic pole guard bands are arranged at intervals along the circumferential direction of the rotor magnetic yoke; each magnetic pole protective belt is buckled on a row of magnetic poles,
two ends of each magnetic pole guard band are respectively fixed on the magnetic yoke of the rotor by adopting a fixing piece, so that each magnetic pole guard band is abutted with the magnetic pole;
each row of the magnetic poles comprises a plurality of magnetizing magnetic steels, and the width of the magnetic pole guard band is equal to or less than that of the magnetizing magnetic steels.
2. The magnetic pole guard structure of claim 1 wherein each of the magnetic pole guard strips has flanges at opposite ends thereof, the flanges extending in opposite directions.
3. The pole guard structure of claim 2 wherein the fixture comprises: a plurality of pairs of non-magnetic stop blocks and a plurality of bolts; each non-magnetic-conductive block is provided with a mounting hole, each pair of non-magnetic-conductive blocks is respectively and correspondingly arranged on the two folded edges of the magnetic pole protective belt,
and the bolt penetrates through the mounting hole and the folded edge to fix the magnetic pole protective belt on the rotor magnetic yoke.
4. The pole guard structure of claim 3 wherein the height of the pole guard strip is less than the thickness of the pole.
5. The pole guard structure of claim 4, further comprising: and the glass fiber resin layer covers the surface of the rotor magnetic yoke, all the magnetic poles, all the magnetic pole protective belts and all the fixing pieces.
6. The pole guard structure of claim 1 wherein the pole guard strip is made of a non-magnetically conductive material.
7. The magnetic pole guard structure of claim 1 wherein the magnetic pole guard band is a full pole stainless steel band or a segmented pole stainless steel band.
8. A magnetic pole guard structure as claimed in any one of claims 1 to 7 wherein each of the magnetic pole guard strips is provided with a plurality of openings.
9. A rotor, comprising: a rotor yoke; the magnetic poles are arranged at intervals along the circumferential direction of the rotor magnetic yoke, and an unshielded axial channel is formed between two adjacent rows of the magnetic poles; and a pole guard structure as claimed in any one of claims 1 to 8.
10. An electrical machine comprising a rotor according to claim 9 and a stator, the rotor being arranged coaxially with the stator.
11. A method of mounting a rotor according to claim 9, comprising:
step S1, pre-fixing magnetic pole process fixing pieces on the mounting surface of the rotor magnetic yoke, wherein two adjacent magnetic pole process fixing pieces form a magnetic pole guide passage;
step S2: a plurality of magnetizing magnetic steels are correspondingly pushed into the magnetic pole guide passages by adopting an installation method of directly pushing and releasing the magnetizing magnetic steels, and a plurality of magnetizing magnetic steels in each row of magnetic pole guide passages form a row of magnetic poles;
each magnetizing magnetic steel is provided with a preset position, and the central point of each preset position is coaxial with the central point of the magnetizing magnetic steel positioned at the preset position; the step S2 includes:
s2.1, point-coating quick-drying structural adhesive at the central point of the preset position of the first magnetizing magnetic steel, and pushing the first magnetizing magnetic steel to the preset position along the magnetic pole guide passage;
s2.2, point-coating quick-drying structural adhesive at the central point of the preset position of the second magnetizing magnetic steel, pushing the second magnetizing magnetic steel to the preset position along the magnetic pole guide passage, and adhering and pre-fixing the second magnetizing magnetic steel; the process is repeated until the magnetizing magnetic steel is bonded and pre-fixed to form a magnetic pole;
step S3, disassembling all the magnetic pole process fixing pieces, and forming an unshielded axial channel between two adjacent rows of magnetic poles;
step S4, correspondingly buckling all the magnetic pole guard bands on the magnetic poles, and fixing two ends of each magnetic pole guard band on the rotor magnetic yoke by adopting a fixing piece; the magnetic pole protective belt is abutted to the magnetic pole.
12. The method of mounting a rotor according to claim 11,
the central point of the preset position is the intersection point of the central line and the axial central line of the circumferential direction to which the magnetizing magnetic steel located at the preset position belongs.
13. The rotor mounting method according to claim 12, further comprising, before performing the step S4: and paving glass fiber cloth on the surface of the rotor magnetic yoke and all the magnetic poles, infiltrating the surfaces of all the magnetic poles through a resin vacuum introduction process, and combining the glass fiber cloth with the magnetic yoke to form a glass fiber resin layer so as to seal all the magnetic poles.
14. The rotor mounting method according to claim 12, further comprising, after performing the step S4: and paving glass fiber cloth on the surface of the magnetic yoke of the rotor, all the magnetic poles, the magnetic pole protective belts and the fixing pieces, infiltrating the surfaces of all the magnetic poles through a resin vacuum introduction process, and combining with the glass fiber cloth to form a glass fiber resin layer so as to seal all the magnetic poles.
15. A method of mounting a rotor according to claim 13 or 14, further comprising: and performing penetrating pinhole detection on the whole range of the glass fiber resin layer by using an electric spark leak detector, and plugging the alarm position by using a hole sealing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010251188.2A CN111342581B (en) | 2020-04-01 | 2020-04-01 | Magnetic pole protection structure, rotor, motor and rotor installation method |
Applications Claiming Priority (1)
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