CN112671187A - Mixed magnetic circuit solid permanent magnet rotor and assembly tool and assembly method thereof - Google Patents
Mixed magnetic circuit solid permanent magnet rotor and assembly tool and assembly method thereof Download PDFInfo
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- CN112671187A CN112671187A CN202110071471.1A CN202110071471A CN112671187A CN 112671187 A CN112671187 A CN 112671187A CN 202110071471 A CN202110071471 A CN 202110071471A CN 112671187 A CN112671187 A CN 112671187A
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Abstract
The invention discloses a solid permanent magnet rotor with a mixed magnetic circuit and an assembly tool and an assembly method thereof, and belongs to the field of motors. The assembly tool of the solid permanent magnet rotor with the hybrid magnetic circuit comprises a radial permanent magnet fixing plate, a tangential permanent magnet fixing plate, a special clamp I, a special clamp II, a radial permanent magnet mounting box, a radial permanent magnet guide rod, a tangential permanent magnet mounting box and a tangential permanent magnet guide rod. The assembly tool adopts the disclosed assembly method, so that the permanent magnet motor with the mixed magnetic circuit solid permanent magnet rotor and better starting performance and running performance can be obtained. The assembly tool can fasten the aluminum fixing plates and the magnetic pole iron cores in the preparation process of the rotor welding part, and the concentricity of the plurality of aluminum fixing plates and the magnetic pole iron cores after assembly is ensured; the installation of the tangential permanent magnet and the radial permanent magnet can be smoothly realized, the assembly difficulty is reduced, and the method is simple and convenient, low in cost and excellent in effect.
Description
Technical Field
The invention relates to the field of motors, in particular to a solid permanent magnet rotor with a mixed magnetic circuit and an assembly tool and an assembly method thereof.
Background
An asynchronous starting permanent magnet synchronous motor with a solid rotor structure generally comprises a radial magnetic circuit solid permanent magnet rotor structure, a tangential magnetic circuit solid permanent magnet rotor structure and a mixed magnetic circuit solid permanent magnet rotor structure. The asynchronous starting permanent magnet synchronous motor with the mixed magnetic circuit solid permanent magnet rotor structure has the excellent starting performance of large starting torque, large pull-in torque, large overload multiple and small starting current, and also has the excellent running performance of high efficiency and high power factor, and can further improve the output power of the motor in a limited space and meet the requirement that the asynchronous starting permanent magnet synchronous motor is 1-2 machine seat numbers smaller than an asynchronous motor with the same capacity. However, the mixed magnetic circuit solid permanent magnet rotor structure has more parts and is difficult to assemble, and the conventional assembly tool and the conventional assembly method cannot meet the requirements of rotor assembly precision and smooth installation of permanent magnets, so that the production efficiency and the motor performance of the conventional permanent magnet motor are directly influenced.
Therefore, the assembly tooling and the assembly method of the existing solid permanent magnet rotor with the hybrid magnetic circuit cannot meet the production requirements of the existing permanent magnet motor, and still have inconvenience and defects, so that further improvement is urgently needed. How to create a new mixed magnetic circuit solid permanent magnet rotor, an assembly tool and an assembly method thereof, so that the assembly precision of the mixed magnetic circuit solid permanent magnet rotor and the smooth installation of permanent magnets can be ensured, the production efficiency of a permanent magnet motor is improved, and the good starting performance and the good running performance of a mixed magnetic circuit solid permanent magnet rotor permanent magnet motor are ensured.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an assembly fixture for a solid permanent magnet rotor with a mixed magnetic circuit, which can ensure the assembly precision of the solid permanent magnet rotor with the mixed magnetic circuit and the smooth installation of permanent magnets, thereby improving the production efficiency of a permanent magnet motor, ensuring the good starting performance and the running performance of the permanent magnet motor with the solid permanent magnet rotor with the mixed magnetic circuit, and overcoming the defects of the assembly process of the existing permanent magnet motor.
In order to solve the technical problems, the invention provides an assembly fixture of a mixed magnetic circuit solid permanent magnet rotor, wherein the mixed magnetic circuit solid permanent magnet rotor comprises a rotor welding part, a tangential permanent magnet and a radial permanent magnet, the rotor welding part comprises a lining, aluminum fixing plates arranged on the periphery of the lining at intervals, and magnetic pole iron cores arranged on the periphery of the aluminum fixing plates at intervals, a radial permanent magnet groove for mounting the radial permanent magnet is formed between every two adjacent aluminum fixing plates, and a tangential permanent magnet groove for mounting the tangential permanent magnet is formed between every two adjacent magnetic pole iron cores;
the outer structures of the radial permanent magnet fixing plate and the tangential permanent magnet fixing plate are respectively the same as the outer structures of the radial permanent magnet and the tangential permanent magnet, and the radial permanent magnet fixing plate and the tangential permanent magnet fixing plate are used for replacing the radial permanent magnet and the tangential permanent magnet when the rotor welding part is assembled;
the special fixture I is of a hollow cylinder structure, the inner diameter of the hollow cylinder structure is the same as the outer diameter of a circle formed by enclosing the radial permanent magnet fixing plate and the aluminum fixing plate, and the side wall of the cylinder structure is provided with at least 8 circumferential threaded holes which are used for fastening the radial permanent magnet fixing plate and the aluminum fixing plate through screws respectively;
the special fixture II also adopts a hollow cylinder structure, the inner diameter of the hollow cylinder structure is the same as the outer diameter of a circle formed by the magnetic pole iron core and the tangential permanent magnet fixing plate, and the side wall of the cylinder structure is provided with at least 8 circumferential threaded holes which are respectively used for fastening the magnetic pole iron core and the tangential permanent magnet fixing plate through screws;
the radial permanent magnet mounting box adopts a hollow arc-shaped structure, the inner cavity structure of the hollow arc-shaped structure is the same as the radial permanent magnet structure, and the radial permanent magnet guide rod is the same as the radial permanent magnet structure;
the tangential permanent magnet mounting box is of a U-shaped structure, the U-shaped cavity structure of the U-shaped structure is the same as that of the tangential permanent magnet, and the tangential permanent magnet guide rod is the same as that of the tangential permanent magnet.
The radial permanent magnet mounting box is characterized in that the radial permanent magnet mounting box is internally used for placing two circumferentially arranged left radial permanent magnets and right radial permanent magnets.
The number of the threaded holes uniformly machined in the circumferential direction of the special clamp I and the special clamp II is multiple of the pole number of the motor.
The radial permanent magnet mounting box is formed by bending and welding copper plates, the tangential permanent magnet mounting box is formed by bending copper plates, and the tangential permanent magnet guide bar and the radial permanent magnet guide bar are both formed by processing non-magnetic materials.
The invention also provides an assembly method of the solid permanent magnet rotor with the mixed magnetic circuit, which adopts the assembly tool of the solid permanent magnet rotor with the mixed magnetic circuit, and the assembly method comprises the following steps:
(1) pressing a rotor pressing plate into a specified position of a rotating shaft in advance, installing a bushing key into a bushing key groove of the rotating shaft, then sleeving a rotor welding piece into the rotating shaft in a hot mode, and finely turning the outer circle of a rotor of the rotor welding piece to an accurate size;
(2) the bottom filler strip of the groove is arranged at the bottom of the tangential permanent magnet groove of the rotor welding part, the tangential permanent magnet mounting box is tightly attached to the end surface of the magnetic pole iron core, the U-shaped port of the tangential permanent magnet mounting box is over against the tangential permanent magnet groove, the tangential permanent magnet mounting box is clamped and fixed on the bottom surface of the end part of the rotor groove wedge, the tangential permanent magnet is arranged, the tangential permanent magnet is pushed into the tangential permanent magnet groove by adopting the tangential permanent magnet guide bar, and when one tangential permanent magnet is arranged, the temporary thin iron plate is adopted to block the notch of the tangential permanent magnet, then the tangential permanent magnet mounting box is dismounted, and the tangential permanent magnets of the other pole are sequentially arranged;
(3) the radial permanent magnet mounting box is fixedly mounted at the end part of the magnetic pole iron core, the notch of the inner cavity of the radial permanent magnet mounting box is over against the radial permanent magnet grooves, two radial permanent magnets circumferentially correspond to each radial permanent magnet groove, and when the left radial permanent magnet is mounted, the radial permanent magnet guide bar is inserted into the right side of the radial permanent magnet groove; the left radial permanent magnet is arranged in a left hole of the radial permanent magnet mounting box, and a non-magnetic copper bar is pushed into the left radial permanent magnet groove; after the left radial permanent magnet is installed, a thin iron plate is used for blocking most of the notch of the left radial permanent magnet; then the pre-inserted radial permanent magnet guide rod is pulled out, the right radial permanent magnet is installed in a right hole of the radial permanent magnet installation box, the non-magnetic copper bar is pushed into a right radial permanent magnet groove, the temporary thin iron plate is moved to completely block the notch of the installed radial permanent magnet groove, the radial permanent magnet installation box is disassembled, and the radial permanent magnets of the other polar groove are sequentially installed until all the multi-polar radial permanent magnets are installed;
(4) pressing in a rotor pressing plate at the other end, fixedly connecting the rotor welding piece with the rotor pressing plates at the two ends of the rotor welding piece through a flat gasket, a retaining gasket and a bolt, and flanging the retaining gasket upwards; then rotor baffle keys and rotor baffles pressed into the front and rear ends are installed;
(5) penetrating an aluminum rivet into corresponding holes of a copper end ring of the rotor welding part and a rotor slot wedge from the inside, and riveting the outside of the rotor slot wedge to be flat; the bent parts at the two ends of the small-groove copper plate are respectively firmly riveted with the copper end ring by using copper rivets; and a plurality of balance blocks are arranged on the rotor baffle plates at the front end and the rear end, the balance blocks are fixedly connected with the rotor baffle plates through flat washers, spring washers and screws, and finally, epoxy protective paint is coated on the exposed surface of the solid permanent magnet rotor.
In a further improvement, the preparation method of the rotor welding part in the step (1) comprises the following steps:
a. fixing a plurality of aluminum fixing plates on the periphery of the bushing at intervals through metal bonding glue, fixing the radial permanent magnet fixing plates between every two adjacent aluminum fixing plates, sleeving the special fixture on the periphery of a circle formed by the aluminum fixing plates and the radial permanent magnet fixing plates, and screwing a bolt into a circumferential threaded hole of the special fixture I to realize circumferential fastening of the aluminum fixing plates and the radial permanent magnet fixing plates, curing for more than 20 hours and ensuring the concentricity of the assembled aluminum fixing plates;
b. removing the first special fixture, fixing the plurality of magnetic pole iron cores and the tangential permanent magnet fixing plates on the periphery of the aluminum fixing plate through metal bonding glue, coating the small-groove copper plate with the metal bonding glue, embedding the small-groove copper plate into corresponding grooves of the magnetic pole iron cores, enabling the two ends of the small-groove copper plate to be uniformly distributed, and driving a rotor slot wedge into the corresponding grooves of the magnetic pole iron cores, wherein the two ends of the rotor slot wedge are uniformly distributed;
c. sleeving the special clamp on the periphery of a circle formed by the magnetic pole iron cores and the tangential permanent magnet fixing plate, and screwing bolts into circumferential threaded holes of the special clamp II to realize circumferential fastening of the magnetic pole iron cores and ensure the assembly concentricity of the magnetic pole iron cores;
d. and removing the second special fixture, welding the rotor slot wedge with the magnetic pole iron core, welding the small-slot copper plate with the copper end ring, punching a plurality of punched holes at the joint of the small-slot copper plate and the magnetic pole iron core, and then withdrawing the radial permanent magnet fixing plate and the tangential permanent magnet fixing plate to finish the preparation of the rotor welding piece.
In a further improvement, the method further comprises the following step after the step c: drilling a hole at each end between the aluminum fixing plate and the bush, then filling a cylindrical pin coated with metal bonding glue into each hole, and curing for more than 20 hours.
In a further improvement, at least three first special clamps are sleeved on the periphery formed by the aluminum fixing plate and the radial permanent magnet fixing plate in the step a and are respectively positioned at two ends and the middle section of the aluminum fixing plate and the radial permanent magnet fixing plate;
and c, sleeving at least three special fixtures II on the periphery of a circle formed by the magnetic pole iron core and the tangential permanent magnet fixing plate in the step c, wherein the special fixtures II are respectively positioned at two ends and the middle section of the magnetic pole iron core.
The tangential permanent magnets are axially partitioned, and the axially partitioned tangential permanent magnets are installed in tangential permanent magnet grooves of each pole one by adopting the tangential permanent magnet installation box and a tangential permanent magnet guide rod;
the radial permanent magnet is also axially partitioned, and the radial permanent magnets of the axial partitions are installed in the radial permanent magnet grooves of each pole one by adopting the radial permanent magnet installation boxes and the radial permanent magnet guide bars.
The invention also provides the mixed magnetic circuit solid permanent magnet rotor prepared by the assembling method of the mixed magnetic circuit solid permanent magnet rotor, so that the assembling precision requirement of the rotor is met, the smooth installation of the permanent magnet is realized, the production efficiency of the permanent magnet motor is finally improved, and the good starting performance and the good running performance of the permanent magnet motor of the mixed magnetic circuit solid permanent magnet rotor are ensured.
After adopting such design, the invention has at least the following advantages:
1. the assembly tool for the solid permanent magnet rotor with the mixed magnetic circuit can realize the function of fastening the aluminum fixing plate and the magnetic pole iron core in the preparation process of a rotor welding part by adopting the radial permanent magnet fixing plate, the tangential permanent magnet fixing plate, the special fixture I and the special fixture II, and further ensures the concentricity of the plurality of aluminum fixing plates and the magnetic pole iron cores after assembly; the tangential permanent magnet installation box, the tangential permanent magnet guide rod, the radial permanent magnet installation box and the radial permanent magnet guide rod can be used for smoothly installing the tangential permanent magnet and the radial permanent magnet, the assembly difficulty is reduced, and the tangential permanent magnet installation box, the radial permanent magnet installation box and the radial permanent magnet guide rod are simple and convenient to use, low in cost and good in effect.
2. According to the assembly method of the solid permanent magnet rotor with the mixed magnetic circuit, the special tool is adopted, so that the requirement on the preparation precision of the rotor welding part can be met, the smooth installation of the permanent magnet can be simply and conveniently realized, the assembly difficulty is reduced, and the production efficiency is improved.
3. In the assembling method, the rotor baffle is provided with the balance blocks, so that the dynamic balance performance of the solid permanent magnet rotor can be improved, and the starting performance and the running performance of the motor can be improved. And a hole is drilled at the end part between the aluminum fixing plate and the bush, and then a cylindrical pin coated with metal bonding glue is arranged in each hole, and the aluminum fixing plate and the bush are further ensured to be fixedly connected after being cured for more than 20 hours.
4. The mixed magnetic circuit solid permanent magnet rotor assembled by the assembly tool can meet the assembly precision requirement of the rotor, realize the smooth installation of the permanent magnet, finally improve the production efficiency of the permanent magnet motor and ensure the good starting performance and the good running performance of the mixed magnetic circuit solid permanent magnet rotor permanent magnet motor.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.
FIG. 1 is a longitudinal cross-sectional view of a general assembly of a hybrid magnetic circuit solid permanent magnet rotor of the present invention;
FIG. 2 is a view from the direction B of FIG. 1;
FIG. 3 is a cross-sectional view C-C of FIG. 1;
FIG. 4 is a schematic view of FIG. 3 with the tangential permanent magnets and the radial permanent magnets removed;
FIG. 5 is a longitudinal cross-sectional view of a rotor weldment of the hybrid magnetic circuit solid permanent magnet rotor of the present invention;
FIG. 6 is a B-B cross-sectional view of a rotor weldment of the hybrid magnetic circuit solid permanent magnet rotor of the present invention;
FIG. 7a is a cross-sectional view of a first special fixture in an assembly fixture of the hybrid magnetic circuit solid permanent magnet rotor of the present invention;
FIG. 7b is a side view of a first special fixture in the assembly fixture of the hybrid magnetic circuit solid permanent magnet rotor according to the present invention;
FIG. 8a is a sectional view of a special fixture II in the assembly fixture of the hybrid magnetic circuit solid permanent magnet rotor of the present invention;
FIG. 8b is a side view of a special fixture II in the assembly fixture of the hybrid magnetic circuit solid permanent magnet rotor of the present invention;
FIG. 9a is a cross-sectional view of a tangential permanent magnet mounting box in the assembly tooling of the hybrid magnetic circuit solid permanent magnet rotor of the present invention;
FIG. 9b is a side view of a tangential permanent magnet mounting box in the assembly tooling of the hybrid magnetic circuit solid permanent magnet rotor of the present invention;
FIG. 10a is a cross-sectional view of a tangential permanent magnet guide bar in the assembly tooling of the hybrid magnetic circuit solid permanent magnet rotor of the present invention;
FIG. 10b is a side view of a tangential permanent magnet guide bar in the assembly tooling of the hybrid magnetic circuit solid permanent magnet rotor of the present invention;
fig. 11a is a cross-sectional view of a radial permanent magnet mounting box in an assembly tool of a hybrid magnetic circuit solid permanent magnet rotor according to the present invention;
fig. 11b is a side view of a radial permanent magnet mounting box in an assembly tool of the hybrid magnetic circuit solid permanent magnet rotor of the present invention;
fig. 12a is a cross-sectional view of a radial permanent magnet guide bar in an assembly tool of a hybrid magnetic circuit solid permanent magnet rotor according to the present invention;
fig. 12b is a side view of the radial permanent magnet guide bars in the assembly tooling of the hybrid magnetic circuit solid permanent magnet rotor of the present invention.
Detailed Description
Referring to fig. 1, 2 and 3, a concrete structure of the hybrid magnetic circuit solid permanent magnet rotor of the embodiment includes: the rotor comprises a rotor welding piece 1, tangential permanent magnets 2, groove bottom pad strips 3, radial permanent magnets 4, aluminum rivets 5, flat pads 6, backstop gaskets 7, bolts 8, backstop gaskets 9, a rotor pressing plate 10, a lining key 11, a rotor baffle 12, a rotating shaft 13, a rotor baffle key 14, a rotor pressing plate 15, a balance block 16, flat gaskets 17, spring gaskets 18, screws 19 and copper rivets 20.
Referring to fig. 5 and fig. 6 again, the rotor weldment 1 of the mixed magnetic circuit solid permanent magnet rotor of the present embodiment is a component structure, and includes: the small-groove copper plate 101, the small-groove copper plate 102, the pole core 103, the slot wedge 104, the cylindrical pin 105, the aluminum fixing plate 106, the bushing 107, and the copper end ring 110 may be assembled and welded in advance.
Referring to fig. 7a to 12b again, the assembly fixture for the solid permanent magnet rotor with the hybrid magnetic circuit in this embodiment includes a radial permanent magnet fixing plate 108, a tangential permanent magnet fixing plate 109, a first special fixture g1, a second special fixture g2, a radial permanent magnet mounting box g5, a radial permanent magnet guide rod g6, a tangential permanent magnet mounting box g3, and a tangential permanent magnet guide rod g 4.
The outer structures of the radial permanent magnet fixing plate 108 and the tangential permanent magnet fixing plate 109 are respectively the same as the outer structures of the radial permanent magnet 4 and the tangential permanent magnet 2, and the radial permanent magnet fixing plate and the tangential permanent magnet fixing plate are used for replacing the radial permanent magnet 4 and the tangential permanent magnet 2 when the rotor weldment 1 is assembled.
As shown in fig. 7a and 7b, the special fixture one g1 is a hollow cylinder structure, the inner diameter D2 of the hollow cylinder structure is the same as the outer diameter of the circle enclosed by the radial permanent magnet fixing plate 108 and the aluminum fixing plate 106, and the side wall of the cylinder structure is provided with at least 8 circumferential threaded holes 111 for fastening the radial permanent magnet fixing plate 108 and the aluminum fixing plate 106 by screws respectively.
As shown in fig. 8a and 8b, the special fixture two g2 also adopts a hollow cylinder structure, the inner diameter D4 of the hollow cylinder structure is the same as the outer diameter of a circle enclosed by the pole core 103 and the tangential permanent magnet fixing plate 109, and the side wall of the cylinder structure is provided with at least 8 circumferential threaded holes 112 for fastening the pole core 103 and the tangential permanent magnet fixing plate 109 by screws respectively.
In practical application, the number of the threaded holes uniformly machined in the circumferential direction of the first special clamp g1 and the second special clamp g2 is multiple of the pole number of the motor.
As shown in fig. 11a and 11b, the radial permanent magnet mounting box g5 has a hollow arc structure, and the inner cavity structure of the hollow arc structure is the same as that of the radial permanent magnet 4. As shown in fig. 12a and 12b, the radial permanent magnet guide bar g6 has the same structure as the radial permanent magnet 4. The radial permanent magnet mounting box g5 is used for placing two circumferentially arranged left radial permanent magnets and right radial permanent magnets.
As shown in fig. 9a and 9b, the tangential permanent magnet mounting box g3 has a U-shaped structure, and the U-shaped cavity structure of the U-shaped structure is the same as that of the tangential permanent magnet 2. As shown in fig. 10a and 10b, the tangential permanent magnet guide bar g4 is identical in structure to the tangential permanent magnet 2.
The assembly fixture for the solid permanent magnet rotor with the hybrid magnetic circuit can realize the precise assembly of the solid permanent magnet rotor, and comprises the following specific assembly steps:
referring to fig. 6, 7a, 7b, 8a and 8b, the aluminum fixing plate 106 and the bushing 107 are cleaned, and the aluminum fixing plate 106 is coated with a metal adhesive glue, such as loctite glue, on the contact surface with the bushing 107 and fixed on the bushing 107 according to the position of fig. 6; the radial permanent magnet fixing plates 108 are uniformly arranged on the bushing 107, namely between every two adjacent aluminum fixing plates 106, and at the moment, the outer circles of the aluminum fixing plates 106 and the radial permanent magnet fixing plates 108 are clamped by a special clamp g 1. Three special fixtures one g1 can be used to clamp the two ends and the middle section of the aluminum fixing plate 106 and the radial permanent magnet fixing plate 108, respectively, and corresponding bolts (not shown) are screwed into the circumferential threaded holes 111 of the special fixtures one to realize circumferential compression of the aluminum fixing plate 106 and the radial permanent magnet fixing plate 108, and the curing is performed for more than 20 hours, for example, 24 hours.
After curing, removing the special fixture one g1, assembling the magnetic pole core 103 and the tangential permanent magnet fixing plate 109 according to the position shown in fig. 6, and coating a loctite adhesive between the contact surfaces of the aluminum fixing plate 106 and the magnetic pole core 103; coating le tai glue on the contact surfaces of the small-groove copper plate 101, the small-groove copper plate 102 and the magnetic pole iron core 103, embedding the contact surfaces into corresponding grooves of the magnetic pole iron core 103, and uniformly distributing the two ends of the contact surfaces; the rotor slot wedges 104 are driven into corresponding slots of the magnetic pole iron core 103, and the two ends are uniformly distributed; at this time, the outer circle of the pole core 103 is clamped by three special clamps two g2, and the two ends and the middle section of the pole core 103 are respectively clamped; the pole core 103 is also circumferentially pressed by screwing corresponding bolts into the circumferential threaded holes 112, and cured for 24 hours.
In order to further enhance the connection firmness of the aluminum fixing plate and the bushing, four holes are drilled at two ends of the position between the aluminum fixing plate 106 and the bushing 107 according to the position shown in fig. 6, then the cylindrical pin 105 is installed, the surface of the cylindrical pin 105 is coated with loctite glue, and the cylindrical pin is cured for more than 20 hours.
After the solidification is finished, removing the second special fixture g2, and firmly welding the rotor slot wedges 104 and the magnetic pole iron core 103 by using stainless steel bars; the small-groove copper plate 101 and the small-groove copper plate 102 are firmly welded with the copper end ring 110 respectively; punching holes at a plurality of positions of the joint of the small-groove copper plate and the magnetic pole iron core 103; and withdrawing the radial permanent magnet fixing plate 108 and the tangential permanent magnet fixing plate 109 to obtain the rotor welding part 1.
When the assembly is carried out, the rotor pressing plate 15 is pressed into a specified position of the rotating shaft 13 in advance; the lining key 11 is arranged in the lining key groove of the rotating shaft 13; sleeving the prepared rotor welding part 1 into the rotating shaft 13 in a hot manner; and finely turning the outer circle of the rotor weldment 1 to an accurate size.
Then referring to the attached drawings 3, 4, 9a, 9b, 10a and 10b, the groove bottom filler strip 3 is arranged at the bottom of the tangential permanent magnet groove of the rotor welding part 1, and the groove bottom filler strip 3 is made of epoxy glass cloth plate; the tangential permanent magnet mounting box g3 is tightly attached to the end face of the magnetic pole iron core 103, the notch of the tangential permanent magnet mounting box is opposite to the tangential permanent magnet slot, and the tangential permanent magnet mounting box g3 is clamped and fixed on the bottom face of the end part of the rotor slot wedge 104; the tangential permanent magnets 2 are axially partitioned, are arranged in a tangential permanent magnet mounting box g3 block by block, and are pushed into a tangential permanent magnet groove by a tangential permanent magnet guide rod g 4; when one tangential permanent magnet polar slot is installed, a temporary thin iron plate is used for blocking the notch of the tangential permanent magnet; and (5) removing the tangential permanent magnet mounting box g3, and mounting the other polar tangential permanent magnet 2 until the multipole tangential permanent magnets are mounted.
Referring to fig. 3, 4, 11a, 11b, 12a and 12b again, a radial permanent magnet mounting box g5 is mounted and fixed at the end of the pole core 103, and the notch faces the radial permanent magnet slot; the radial permanent magnet 4 is circumferentially divided into two blocks; when the left radial permanent magnet 4 is installed, a radial permanent magnet guide bar g6 is inserted into the right side of the radial permanent magnet groove; the left radial permanent magnets 2 are installed in the left tool hole of the radial permanent magnet installation box g5 block by block, and a non-magnetic copper bar is pushed into the left radial permanent magnet groove; after the left permanent magnet of one radial permanent magnet groove is installed, most of the notch of the left permanent magnet is blocked by a thin iron plate; the radial permanent magnet guide bar g6 in the right radial permanent magnet groove is pulled out, the right radial permanent magnets 4 are installed into the right radial permanent magnet groove one by one, and the non-magnetic copper bar is pushed into the right radial permanent magnet groove; after the right half permanent magnet 4 of the right radial permanent magnet slot is completely installed, the temporary thin iron plate is moved to completely block the radial magnet slot opening where the radial permanent magnet 4 is installed; and (5) detaching the radial permanent magnet mounting box g6, and mounting the radial permanent magnet of the other polar slot until the multi-polar radial permanent magnets are mounted.
After all the tangential permanent magnets 2 and the radial permanent magnets 4 are assembled, a rotor pressing plate 10 at the non-shaft extension end is pressed in as shown in the attached drawing 1; through a flat gasket 6, a backstop gasket 7 and a bolt 8, a shaft extension end rotor pressing plate 15 and a non-shaft extension end rotor pressing plate 10 are fixedly connected with a rotor welding piece 1, and the backstop gasket 7 is flanged upwards; through a flat gasket 6, a backstop gasket 9 and a bolt 8, a shaft extension end rotor pressing plate 15 and a non-shaft extension end rotor pressing plate 10 are fixedly connected with a rotor welding piece 1, and the backstop gasket 9 is flanged upwards; rotor baffle keys 14 are installed and pressed into the front and rear rotor baffles 12.
Then, the aluminum rivets 5 penetrate into corresponding holes of the copper end ring 110 of the rotor weldment 1 and the rotor slot wedges 104 from the lower part, and are riveted flat on the rotor slot wedges 104; the bent parts at the two ends of the small-groove copper plate 101 and the small-groove copper plate 102 are respectively riveted with the copper end ring 110 by using copper rivets 20; according to the requirement of dynamic balance, a certain number of balance blocks 16 are arranged in the front rotor baffle plate 12 and the rear rotor baffle plate 12, and the balance blocks 16 are fixedly connected with the rotor baffle plate 14 through flat washers 17, spring washers 19 and screws 19; and finally, brushing epoxy protective paint on the exposed surface of the assembled solid permanent magnet rotor to finish the assembly of the solid permanent magnet rotor with the mixed magnetic circuit.
In the embodiment, the tangential permanent magnet mounting box g3 is formed by bending a copper plate; the tangential permanent magnet guide bar g4 is made of non-magnetic copper plate, aluminum plate or epoxy plate; the radial permanent magnet mounting box g5 is formed by bending and welding copper plates; the radial permanent magnet guide bar g6 is made of non-magnetic material, such as copper plate, aluminum plate or epoxy plate; the rotor slot wedge 3 is processed by a copper plate; the shaft extension end rotor pressing plate 15 and the non-shaft extension end rotor pressing plate 10 are made of non-magnetic materials; the copper end ring 110 is formed by bending red copper, and the small-groove copper plate is formed by processing a copper plate; the aluminum fixing plate 106 is made of a hard aluminum plate made of a non-magnetic material; the pole core 103 and the bushing 107 are made of mild steel, and standard parts for fastening and connecting the rotor pressing plate and the rotor welding part are all stainless steel materials.
The mixed magnetic circuit solid permanent magnet rotor obtained by the invention can meet the assembly precision requirement of the rotor, realizes the smooth installation of the permanent magnet, finally improves the production efficiency of the permanent magnet motor, and ensures the good starting performance and the good running performance of the mixed magnetic circuit solid permanent magnet rotor permanent magnet motor.
The mixed magnetic circuit solid permanent magnet rotor belongs to a mixed magnetic circuit solid permanent magnet structure in the solid permanent magnet rotor, and the asynchronous starting synchronous operation permanent magnet synchronous motor with the mixed magnetic circuit solid permanent magnet rotor has excellent starting requirements of large starting torque, large pull-in torque, large overload multiple and small starting current; meanwhile, the motor has excellent operation performance of high efficiency, high power factor and high power density, and the output power of the motor is greatly improved in a limited space. The assembly tool can simply and conveniently realize the assembly of the solid permanent magnet rotor with the mixed magnetic circuit, ensure that each aluminum fixing plate is uniformly arranged on the bushing, and ensure the concentricity of the four aluminum fixing plates after the assembly; each magnetic pole iron core is uniformly arranged on the aluminum fixing plate, and the assembly concentricity of the four magnetic pole iron cores is ensured; and the smooth assembly of the tangential permanent magnet and the radial permanent magnet is also ensured. With the help of the assembly fixture, the problems that the production efficiency of a motor and the performance of the motor are directly affected due to the low production efficiency, the low assembly precision, the difficult assembly of the permanent magnet and the like of the existing mixed magnetic circuit solid permanent magnet rotor are effectively solved, and the production efficiency of the mixed magnetic circuit solid permanent magnet rotor is improved.
In addition, tangential and radial permanent magnets in the solid permanent magnet rotor of the mixed magnetic circuit are designed into axial block and radial block structures, so that the formed mixed magnetic circuit can adjust the back electromotive force of the motor to be close to the voltage of a power grid, the prepared mixed magnetic circuit asynchronous starting permanent magnet synchronous motor is ensured to have higher power factor and small no-load current, and the efficiency is further improved in a limited rotor space; and the finally prepared mixed magnetic circuit asynchronous starting permanent magnet synchronous motor has a large overload torque multiple.
The assembly tool of the solid permanent magnet rotor with the mixed magnetic circuit can be widely applied to the structure and the production method of the solid rotor with the mixed magnetic circuit of the asynchronous starting permanent magnet synchronous motor with other pole numbers through reference and transformation, and has wide application.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", 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 the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The assembly tool for the solid permanent magnet rotor with the mixed magnetic circuit comprises a rotor welding part, tangential permanent magnets and radial permanent magnets, wherein the rotor welding part comprises a lining, aluminum fixing plates arranged on the periphery of the lining at intervals and magnetic pole iron cores arranged on the periphery of the aluminum fixing plates at intervals, a radial permanent magnet groove for mounting the radial permanent magnets is formed between every two adjacent aluminum fixing plates, and a tangential permanent magnet groove for mounting the tangential permanent magnets is formed between every two adjacent magnetic pole iron cores;
the outer structures of the radial permanent magnet fixing plate and the tangential permanent magnet fixing plate are respectively the same as the outer structures of the radial permanent magnet and the tangential permanent magnet, and the radial permanent magnet fixing plate and the tangential permanent magnet fixing plate are used for replacing the radial permanent magnet and the tangential permanent magnet when the rotor welding part is assembled;
the special fixture I is of a hollow cylinder structure, the inner diameter of the hollow cylinder structure is the same as the outer diameter of a circle formed by enclosing the radial permanent magnet fixing plate and the aluminum fixing plate, and the side wall of the cylinder structure is provided with at least 8 circumferential threaded holes which are used for fastening the radial permanent magnet fixing plate and the aluminum fixing plate through screws respectively;
the special fixture II also adopts a hollow cylinder structure, the inner diameter of the hollow cylinder structure is the same as the outer diameter of a circle formed by the magnetic pole iron core and the tangential permanent magnet fixing plate, and the side wall of the cylinder structure is provided with at least 8 circumferential threaded holes which are respectively used for fastening the magnetic pole iron core and the tangential permanent magnet fixing plate through screws;
the radial permanent magnet mounting box adopts a hollow arc-shaped structure, the inner cavity structure of the hollow arc-shaped structure is the same as the radial permanent magnet structure, and the radial permanent magnet guide rod is the same as the radial permanent magnet structure;
the tangential permanent magnet mounting box is of a U-shaped structure, the U-shaped cavity structure of the U-shaped structure is the same as that of the tangential permanent magnet, and the tangential permanent magnet guide rod is the same as that of the tangential permanent magnet.
2. The assembly tooling for the solid permanent magnet rotor with the hybrid magnetic circuit according to claim 1, wherein the radial permanent magnet mounting box is used for placing two circumferentially arranged left radial permanent magnets and right radial permanent magnets.
3. The assembly tooling for the solid permanent magnet rotor with the hybrid magnetic circuit according to claim 2, wherein the number of the threaded holes uniformly machined in the circumferential direction of the first special fixture and the second special fixture is a multiple of the number of poles of the motor.
4. The assembly tooling for the solid permanent magnet rotor with the hybrid magnetic circuit according to any one of claims 1 to 3, wherein the radial permanent magnet mounting box is formed by bending and welding copper plates, the tangential permanent magnet mounting box is formed by bending copper plates, and the tangential permanent magnet guide bar and the radial permanent magnet guide bar are both formed by processing non-magnetic materials.
5. An assembling method of a solid permanent magnet rotor with a hybrid magnetic circuit, which is characterized in that the assembling tool of the solid permanent magnet rotor with the hybrid magnetic circuit of any one of claims 1 to 4 is adopted, and the assembling method comprises the following steps:
(1) pressing a rotor pressing plate into a specified position of a rotating shaft in advance, installing a bushing key into a bushing key groove of the rotating shaft, then sleeving a rotor welding piece into the rotating shaft in a hot mode, and finely turning the outer circle of a rotor of the rotor welding piece to an accurate size;
(2) the bottom filler strip of the groove is arranged at the bottom of the tangential permanent magnet groove of the rotor welding part, the tangential permanent magnet mounting box is tightly attached to the end surface of the magnetic pole iron core, the U-shaped port of the tangential permanent magnet mounting box is over against the tangential permanent magnet groove, the tangential permanent magnet mounting box is clamped and fixed on the bottom surface of the end part of the rotor groove wedge, the tangential permanent magnet is arranged, the tangential permanent magnet is pushed into the tangential permanent magnet groove by adopting the tangential permanent magnet guide bar, and when one tangential permanent magnet is arranged, the temporary thin iron plate is adopted to block the notch of the tangential permanent magnet, then the tangential permanent magnet mounting box is dismounted, and the tangential permanent magnets of the other pole are sequentially arranged;
(3) the radial permanent magnet mounting box is fixedly mounted at the end part of the magnetic pole iron core, the notch of the inner cavity of the radial permanent magnet mounting box is over against the radial permanent magnet grooves, two radial permanent magnets circumferentially correspond to each radial permanent magnet groove, and when the left radial permanent magnet is mounted, the radial permanent magnet guide bar is inserted into the right side of the radial permanent magnet groove; the left radial permanent magnet is arranged in a left hole of the radial permanent magnet mounting box, and a non-magnetic copper bar is pushed into the left radial permanent magnet groove; after the left radial permanent magnet is installed, a thin iron plate is used for blocking most of the notch of the left radial permanent magnet; then the pre-inserted radial permanent magnet guide rod is pulled out, the right radial permanent magnet is installed in a right hole of the radial permanent magnet installation box, the non-magnetic copper bar is pushed into a right radial permanent magnet groove, the temporary thin iron plate is moved to completely block the notch of the installed radial permanent magnet groove, the radial permanent magnet installation box is disassembled, and the radial permanent magnets of the other polar groove are sequentially installed until all the multi-polar radial permanent magnets are installed;
(4) pressing in a rotor pressing plate at the other end, fixedly connecting the rotor welding piece with the rotor pressing plates at the two ends of the rotor welding piece through a flat gasket, a retaining gasket and a bolt, and flanging the retaining gasket upwards; then rotor baffle keys and rotor baffles pressed into the front and rear ends are installed;
(5) penetrating an aluminum rivet into corresponding holes of a copper end ring of the rotor welding part and a rotor slot wedge from the inside, and riveting the outside of the rotor slot wedge to be flat; the bent parts at the two ends of the small-groove copper plate are respectively firmly riveted with the copper end ring by using copper rivets; and a plurality of balance blocks are arranged on the rotor baffle plates at the front end and the rear end, the balance blocks are fixedly connected with the rotor baffle plates through flat washers, spring washers and screws, and finally, epoxy protective paint is coated on the exposed surface of the solid permanent magnet rotor.
6. The method for assembling a hybrid magnetic circuit solid permanent magnet rotor according to claim 5, wherein the method for preparing the rotor weldment in the step (1) comprises the following steps:
a. fixing a plurality of aluminum fixing plates on the periphery of the bushing at intervals through metal bonding glue, fixing the radial permanent magnet fixing plates between every two adjacent aluminum fixing plates, sleeving the special fixture on the periphery of a circle formed by the aluminum fixing plates and the radial permanent magnet fixing plates, and screwing a bolt into a circumferential threaded hole of the special fixture I to realize circumferential fastening of the aluminum fixing plates and the radial permanent magnet fixing plates, curing for more than 20 hours and ensuring the concentricity of the assembled aluminum fixing plates;
b. removing the first special fixture, fixing the plurality of magnetic pole iron cores and the tangential permanent magnet fixing plates on the periphery of the aluminum fixing plate through metal bonding glue, coating the small-groove copper plate with the metal bonding glue, embedding the small-groove copper plate into corresponding grooves of the magnetic pole iron cores, enabling the two ends of the small-groove copper plate to be uniformly distributed, and driving a rotor slot wedge into the corresponding grooves of the magnetic pole iron cores, wherein the two ends of the rotor slot wedge are uniformly distributed;
c. sleeving the special clamp on the periphery of a circle formed by the magnetic pole iron cores and the tangential permanent magnet fixing plate, and screwing bolts into circumferential threaded holes of the special clamp II to realize circumferential fastening of the magnetic pole iron cores and ensure the assembly concentricity of the magnetic pole iron cores;
d. and removing the second special fixture, welding the rotor slot wedge with the magnetic pole iron core, welding the small-slot copper plate with the copper end ring, punching a plurality of punched holes at the joint of the small-slot copper plate and the magnetic pole iron core, and then withdrawing the radial permanent magnet fixing plate and the tangential permanent magnet fixing plate to finish the preparation of the rotor welding piece.
7. The method for assembling a hybrid magnetic circuit solid permanent magnet rotor according to claim 6, further comprising the step of, after the step c: drilling a hole at each end between the aluminum fixing plate and the bush, then filling a cylindrical pin coated with metal bonding glue into each hole, and curing for more than 20 hours.
8. The method for assembling the hybrid magnetic circuit solid permanent magnet rotor according to claim 7, wherein at least three first special clamps are sleeved on the periphery formed by the aluminum fixing plate and the radial permanent magnet fixing plate in the step a, and are respectively positioned at two ends and the middle section of the aluminum fixing plate and the radial permanent magnet fixing plate;
and c, sleeving at least three special fixtures II on the periphery of a circle formed by the magnetic pole iron core and the tangential permanent magnet fixing plate in the step c, wherein the special fixtures II are respectively positioned at two ends and the middle section of the magnetic pole iron core.
9. The method for assembling the solid permanent magnet rotor with the hybrid magnetic circuit according to claim 5, wherein the tangential permanent magnets are axially partitioned, and the axially partitioned tangential permanent magnets are installed in tangential permanent magnet slots of each pole one by adopting the tangential permanent magnet installation box and a tangential permanent magnet guide rod;
the radial permanent magnet is also axially partitioned, and the radial permanent magnets of the axial partitions are installed in the radial permanent magnet grooves of each pole one by adopting the radial permanent magnet installation boxes and the radial permanent magnet guide bars.
10. A hybrid magnetic circuit solid permanent magnet rotor, characterized in that the hybrid magnetic circuit solid permanent magnet rotor is prepared by the assembling method of the hybrid magnetic circuit solid permanent magnet rotor of any one of claims 5 to 9.
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| CN202110071471.1A CN112671187A (en) | 2021-01-19 | 2021-01-19 | Mixed magnetic circuit solid permanent magnet rotor and assembly tool and assembly method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825708A (en) * | 2022-05-12 | 2022-07-29 | 重庆大学 | Magnetic gear rotor and structure forming tool system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825708A (en) * | 2022-05-12 | 2022-07-29 | 重庆大学 | Magnetic gear rotor and structure forming tool system thereof |
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