CN113991947A - Positioning tool and rotor lamination assembling method - Google Patents
Positioning tool and rotor lamination assembling method Download PDFInfo
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- CN113991947A CN113991947A CN202111607151.XA CN202111607151A CN113991947A CN 113991947 A CN113991947 A CN 113991947A CN 202111607151 A CN202111607151 A CN 202111607151A CN 113991947 A CN113991947 A CN 113991947A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/02—Assembly jigs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention relates to the field of magnetic suspension bearings, in particular to a positioning tool and a rotor lamination assembling method. The positioning tool provided by the invention comprises an expansion assembly and a compression assembly; the expansion assembly comprises an axial positioning piece and a radial positioning piece, the radial positioning piece can penetrate through a shaft hole of the lamination stack, the radial positioning piece can generate radial acting force on the hole wall of the shaft hole, the radial positioning piece is provided with a first end and a second end which are opposite to each other along the axial direction of the lamination stack, the compression assembly is detachably matched with the lamination stack, and the compression assembly can generate axial compression acting force on the lamination stack; the first end and the second end of the radial positioning piece are respectively located on two sides of the pressing assembly, the axial positioning piece is connected to the position, close to the first end, of the radial positioning piece, and the pressing assembly generates acting force to the axial positioning piece along the direction from the second end to the first end. The lamination assembly of the lamination stack can be simplified.
Description
Technical Field
The invention relates to the field of magnetic suspension bearings, in particular to a positioning tool and a rotor lamination assembling method.
Background
The magnetic suspension bearing rotor consists of six parts, namely a sensor lamination pressing ring, a sensor lamination, a magnetic bearing lamination pressing ring, a magnetic bearing lamination, a bottom positioning ring and a rotor mandrel, wherein a lamination positioning sleeve cup plays a role in supporting and positioning in a conventional assembly method, the sensor lamination pressing ring, the sensor lamination, the magnetic bearing lamination pressing ring and the magnetic bearing lamination are sequentially placed in an inner cavity of the lamination positioning sleeve cup and are axially compressed after being placed, then the sensor lamination pressing ring and the lamination positioning sleeve cup are circumferentially and annularly welded to be locked and fixed to form a rotor assembly, then the rotor assembly is heated and then sleeved on the rotor mandrel, machining is finally carried out, and the outer diameter of the rotor assembly is machined to the required size.
According to the assembling method, the lamination positioning sleeve cup is only used in the assembling process, the lamination positioning sleeve cup is machined and removed by a finished product, the lamination positioning sleeve cup is a consumable part, the cost of the magnetic suspension motor rotor is increased comprehensively, and the cost waste is caused. Moreover, if assembly defects exist after the rotor assembly is laminated and welded, for example, the number of the laminations is assembled with deviation, foreign matters are mixed between the laminations or gaps exist, the sequence of the laminations and the compression ring has deviation, the welding points need to be cut off and then readjusted to be correct during maintenance, welding is performed, the welding point removing process needs to be performed by a machine tool, manual work cannot be completed, the lamination positioning sleeve is a thin-walled piece, the precision of the part is easily damaged, the part is scrapped, time and labor are wasted during the maintenance process, and cost waste and construction period delay are caused.
Disclosure of Invention
One of the purposes of the invention is to provide a positioning tool which can simplify the lamination assembly of a lamination stack.
The invention also aims to provide a rotor lamination assembling method, which can simplify the assembly of a lamination group and a rotor.
On one hand, the positioning tool provided by the invention comprises an expansion assembly and a compression assembly;
the expansion assembly comprises an axial positioning piece and a radial positioning piece, the radial positioning piece can penetrate through a shaft hole of the lamination stack, the radial positioning piece can generate radial acting force on the shaft hole wall of the shaft hole, the radial positioning piece is provided with a first end and a second end which are opposite to each other in the axial direction of the lamination stack, and the first end of the radial positioning piece is connected with the axial positioning piece;
the compressing assembly is detachably matched with the lamination stack and comprises a first compressing piece and a second compressing piece which are oppositely arranged, the first compressing piece comprises a second positioning ring, the second positioning ring is arranged on the axial positioning piece, and meanwhile, the radial positioning piece is positioned in the second positioning ring;
the lamination group is arranged between the second pressing piece and the second positioning ring, and two ends of the lamination group are respectively abutted against the second pressing piece and the second positioning ring;
the second holding ring includes a plurality of connecting portions, arbitrary adjacent two can dismantle the connection between the connecting portion, whole connecting portion connect gradually and form the second holding ring.
Further, the second pressing piece is provided with a second assembling hole, and the second positioning ring is provided with a first assembling hole;
the first end of the radial positioning piece penetrates through the first assembling hole, and the second end of the radial positioning piece penetrates through the second assembling hole.
Furthermore, first compressing tightly still includes first holding ring, a side end face of first holding ring with the cooperation of axial positioning element, first holding ring has first holding hole, the second holding ring has first pilot hole, the second holding ring is located in the first holding hole, and along first end to second end direction, first holding ring is right the second holding ring produces the effort.
Furthermore, a first protruding portion is arranged on the hole wall of the first positioning hole, a second protruding portion is arranged on the outer annular surface of the second positioning ring, and the first protruding portion is in axial abutting connection with the second protruding portion.
Furthermore, the second positioning ring is provided with a first groove body, the first groove body is arranged along the circumferential direction of the first assembling hole, and the first groove body is provided with a first groove ring surface which can be attached to the outer ring surface of the lamination stack and a first groove end surface which can be attached to the end surface of the lamination stack.
Further, the second pressing piece comprises a third positioning ring, the third positioning ring is provided with a second assembling hole and a second groove body, the second groove body is arranged along the circumferential direction of the second assembling hole, and the second groove body is provided with a second groove ring surface which can be attached to the outer ring surface of the lamination stack and a second groove end surface which can be attached to the end surface of the lamination stack.
Furthermore, a plurality of connecting holes are formed in the first pressing piece, a plurality of through holes are formed in the second pressing piece, and the connecting holes and the through holes are arranged in a one-to-one correspondence manner;
the pressing assembly further comprises a pressing rod and a locking piece, one end of the pressing rod is arranged in the connecting hole, and the other end of the pressing rod penetrates through the through hole to be detachably connected with the locking piece;
the locking piece is abutted to the outer edge of the through hole.
Furthermore, the connecting hole is a threaded hole formed in the first pressing piece;
the pressure lever is a screw rod, and the locking piece is a nut matched with the screw rod;
one end of the screw rod is meshed in the threaded hole, the other end of the screw rod penetrates through the through hole and is connected with the nut, and the nut abuts against the outer edge of the through hole.
Furthermore, the radial positioning piece comprises a base, a core body and a plurality of petal bodies; the valve bodies are uniformly arranged on the base along the circumferential direction of the shaft hole, the valve bodies are provided with fixed ends and free ends which are opposite to each other along the axial direction, the fixed ends are connected with the base, the valve bodies are enclosed to form a positioning cavity with an opening at one end, and the opening is positioned at the free end; the inner wall of the positioning cavity has a taper along the axial direction, and the axial section size of the positioning cavity is gradually reduced along the direction from the free end to the fixed end; the core body is in a round table shape and is matched with the positioning cavity.
In another aspect, the present invention provides a rotor lamination assembly method, comprising the steps of:
s1: placing an axial positioning piece on the horizontal platform, placing a first pressing piece on the axial positioning piece, and enabling a radial positioning piece to penetrate through a first assembling hole of the first pressing piece;
s2: the lamination group is placed on the first pressing piece, and the radial positioning piece penetrates through a shaft hole of the lamination group;
s3: the core body is placed into a positioning cavity of the radial positioning piece, the radial positioning piece is extruded outwards through the core body, so that the radial positioning piece is expanded, and the radial positioning piece extrudes the lamination group outwards in the shaft hole to center the lamination group;
s4: placing a second pressing piece on the lamination group, enabling the radial positioning piece to penetrate through a second assembling hole of the second pressing piece, and connecting the second pressing piece with the first pressing piece, so that the first pressing piece and the second pressing piece can axially extrude the lamination group;
s5: taking out the core body, retracting the radial positioning piece, and extracting the radial positioning piece from the shaft hole;
s6: heating the lamination group, and sleeving the lamination group on the rotor;
s7: sleeving a compression sleeve from the end part of the rotor, wherein the compression sleeve abuts against the second compression part, so that one end of the lamination group abuts against a shaft joint of the rotor;
s8: the compression sleeve, the second compression piece and the first compression piece are sequentially detached.
Has the advantages that:
in the scheme, the lamination group realizes the centering effect through the action of the radial positioning piece before being assembled with the rotor, thereby ensuring the coaxiality among all the laminations, and realizes the tight joint among all the laminations in the lamination group through the action of the expansion assembly, so compared with the traditional method that the sensor lamination pressing ring, the sensor lamination, the magnetic bearing lamination pressing ring and the magnetic bearing lamination are axially and radially positioned by utilizing the lamination positioning sleeve cup and then are welded to be locked and fixed to form the rotor assembly, the scheme does not need to introduce an additional lamination positioning sleeve cup, so that the outer diameter thin-wall part is removed after the assembly of the lamination group and the rotor is finished, the outer diameter of the lamination thin-wall part is consistent with the preset value, the processing amount of the final finished product of the product is saved, the processing efficiency is improved, and meanwhile, the assembly defects can be relatively visually found in the assembly process of the lamination group, if the number of the laminated sheets is assembled with deviation, foreign matters are mixed between the laminated sheets or gaps exist, the laminated sheets and the compression ring have deviation in sequence, and the defects can be corrected only by dismantling the expansion assembly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a positioning tool according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a positioning tool according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a third positioning tool according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second retaining ring according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a first positioning ring according to an embodiment of the present invention;
FIG. 6 is a schematic assembly view provided by an embodiment of the present invention;
fig. 7 is another assembly diagram provided by an embodiment of the present invention.
Icon: 1-a radial positioning element; 2-an axial positioning element; 3-lamination group; 4-a first positioning ring; 5-a second positioning ring; 6-flap body; 7-opening; 8-positioning the cavity; 9-a base; 10-a core; 11-a second assembly hole; 12-a third positioning ring; 13-a locking member; 14-a pressure bar; 15-a first assembly hole; 16-through hole threaded holes; 17-a bottom positioning ring; 18-magnetic bearing laminations; 19-magnetic bearing lamination compression ring; 20-sensor lamination compression ring; 21-a second projection; 22-a connecting part; 23-a first projection; 24-a first locating hole; 25-a compression sleeve; 26-a rotor; 27-sensor stack.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The positioning tool shown in the figures 1 to 7 comprises an expansion assembly and a compression assembly;
the expansion assembly comprises an axial positioning piece 2 and a radial positioning piece 1, the radial positioning piece 1 can penetrate through a shaft hole of the lamination set 3, the radial positioning piece 1 can generate radial acting force on the shaft hole wall of the shaft hole, the radial positioning piece 1 is provided with a first end and a second end which are opposite to each other along the axial direction of the lamination set 3, and the first end of the radial positioning piece 1 is connected with the axial positioning piece 2;
the compressing assembly is detachably matched with the lamination stack 3 and comprises a second compressing piece and a second positioning ring 5 which are oppositely arranged, the second positioning ring 5 is arranged on the axial positioning piece 2, and meanwhile, the radial positioning piece 1 is positioned in the second positioning ring 5;
the lamination group 3 is arranged between the second pressing piece and the second positioning ring 5, and two ends of the lamination group 3 are respectively abutted against the second pressing piece and the second positioning ring 5;
the second positioning ring 5 comprises a plurality of connecting portions 22, any two adjacent connecting portions 22 are detachably connected, and all the connecting portions 22 are sequentially connected to form the second positioning ring 5.
Because the laminated stack 3 realizes the centering effect through the action of the radial positioning piece 1 before being assembled with the rotor 26, the coaxiality among all the laminated sheets is ensured, and the close attachment among all the laminated sheets in the laminated stack 3 is realized through the action of the expansion assembly, compared with the traditional method that the sensor laminated compression ring 20, the sensor laminated sheet 27, the magnetic bearing laminated compression ring 19, the magnetic bearing laminated sheet 18 and the bottom positioning ring 17 are axially and radially positioned by utilizing a laminated positioning sleeve cup, and then are welded to be locked and fixed to form the rotor assembly, the rotor assembly is integrally sleeved on the rotor 26 and finally machined, the outer diameter of the rotor assembly is machined to the required size, no additional laminated positioning sleeve cup is required to be introduced in the scheme, so that the laminated positioning sleeve cup is not required to be cut after the assembly of the laminated stack 3 and the rotor 26 is completed, and the thin-walled part of the outer diameter is removed, the outer diameter of the lamination stack is preset, the machining amount of a final finished product of a product is saved, the machining efficiency is improved, meanwhile, assembly flaws can be found in the assembly process of the lamination stack 3, if the number of laminations is assembled with deviation, foreign matters are mixed between the laminations or gaps exist, the sequence of the laminations and the compression ring has deviation, the assembly flaws can be directly found, and the assembly can be corrected only by removing the compression assembly.
Meanwhile, the second positioning ring 5 includes a plurality of connecting portions 22, the connecting portions 22 are arc-shaped, and when all the connecting portions 22 are connected in sequence, the second positioning ring 5 is formed. After the lamination stack 3 is installed, the second positioning ring 5 is detached without being removed by machining.
In practical use, in order to reduce the number of parts, the second positioning ring 5 includes two connecting portions 22, i.e. the connecting portions 22 are half-ring structures.
Alternatively, the plurality of connecting portions 22 may be fixed by clips, or may be fixed by magnetic attraction.
The lamination stacking of the lamination stack 3 and the matching of the lamination stack 3 and the rotor 26 specifically comprise the following steps:
s1: placing the axial positioning piece 2 on a horizontal platform, placing the first pressing piece on the axial positioning piece 2, and enabling the radial positioning piece 1 to penetrate through the first assembling hole 15 of the first pressing piece;
s2: the lamination group 3 is placed on the first pressing piece, and the radial positioning piece 1 penetrates through the shaft hole of the lamination group 3;
s3: the core body 10 is placed into the positioning cavity 8 of the radial positioning piece 1, the radial positioning piece 1 is extruded outwards through the core body 10, so that the radial positioning piece 1 expands, the radial positioning piece 1 extrudes the lamination group 3 outwards in the shaft hole, and the lamination group 3 is centered;
s4: placing a second pressing piece on the lamination group 3, enabling the radial positioning piece 1 to penetrate through a second assembling hole 11 of the second pressing piece, and connecting the second pressing piece with the first pressing piece, so that the first pressing piece and the second pressing piece axially extrude the lamination group 3;
s5: taking out the core body 10, retracting the radial positioning piece 1, and extracting the radial positioning piece 1 from the shaft hole;
s6: heating the lamination stack 3, and sleeving the lamination stack 3 on the rotor 26;
s7: sleeving a pressing sleeve 25 into the end part of the rotor 26, wherein the pressing sleeve 25 abuts against the second pressing part, so that one end of the laminated stack 3 abuts against a shaft joint of the rotor 26;
s8: the compression sleeve 25, the second compression member and the first compression member are removed in sequence.
In an alternative embodiment, the pressing assembly comprises a first pressing piece and a second pressing piece, and the first pressing piece and the second pressing piece are detachably matched;
in the axial direction, there is a space between the first and second compression pieces for arranging the lamination stack 3;
the first pressing piece generates acting force on the axial positioning piece 2 along the direction from the second end to the first end, and the first pressing piece can generate acting force on the laminated stack 3 along the direction from the first end to the second end and acting force along the radial direction of the laminated stack 3; the second pressure piece can generate a force in the direction from the second end to the first end and a force in the radial direction of the lamination stack 3 for the lamination stack 3.
In an alternative embodiment, the first hold-down element has a first fitting hole 15, and the second hold-down element has a second fitting hole 11;
a first end of the radial positioning element 1 passes through the first assembly hole 15 and a second end of the radial positioning element 1 passes through the second assembly hole 11.
In an alternative embodiment, the first pressing member comprises a first positioning ring 4 and a second positioning ring 5, a side end surface of the first positioning ring 4 is matched with the axial positioning member 2, the first positioning ring 4 is provided with a first positioning hole 24, the second positioning ring 5 is provided with a first assembling hole 15, the second positioning ring 5 is positioned in the first positioning hole 24, and the first positioning ring 4 exerts an acting force on the second positioning ring 5 along the direction from the first end to the second end.
In an alternative embodiment, the hole wall of the first positioning hole 24 is provided with a first protrusion 23, the outer annular surface of the second positioning ring 5 is provided with a second protrusion 21, and the first protrusion 23 is abutted against the second protrusion 21 along the axial direction.
In an alternative embodiment, the second positioning ring 5 has a first groove body arranged in the circumferential direction of the first assembly opening 15, which groove body has a first groove ring surface that can be brought into contact with the outer circumferential surface of the lamination stack 3 and a first groove end surface that can be brought into contact with the end surface of the lamination stack 3.
First cell body setting is in the terminal surface of second holding ring 5 and the pore wall junction of first pilot hole 15, and when first cell body and lamination stack 3 cooperated, lamination stack 3's outer anchor ring and the laminating of first groove anchor ring face, lamination stack 3's terminal surface and the laminating of first groove terminal surface. The first groove ring produces a constraint in the radial direction on the lamination stack 3 and the first groove end produces a constraint in the axial direction on the lamination stack 3.
In an alternative embodiment, the second positioning ring 5 comprises two half rings that enclose the first assembly hole 15.
In an alternative embodiment, the second holding-down element comprises a third positioning ring 12, the third positioning ring 12 having a second assembly opening 11 and a second groove body, which is arranged in the circumferential direction of the second assembly opening 11 and has a second groove ring surface that can be brought into contact with the outer circumferential surface of the lamination stack 3 and a second groove end surface that can be brought into contact with the end surface of the lamination stack 3.
The second cell body sets up in the terminal surface of third holding ring 12 and the pore wall junction of second pilot hole 11, and when the second cell body was in coordination with lamination group 3, lamination group 3's outer anchor ring laminated with the second groove anchor ring, lamination group 3's terminal surface and the laminating of second groove terminal surface. The second groove ring creates a constraint in the radial direction to the lamination stack 3 and the second groove end creates a constraint in the axial direction to the lamination stack 3.
The first slot end face and the second slot end face respectively extrude the lamination set 3 at two ends of the lamination set 3, so that the laminations or the pressure rings in the lamination set 3 are mutually extruded and stacked.
In an optional implementation manner, a plurality of connecting holes are formed in the first pressing member, a plurality of through holes are formed in the second pressing member, and the connecting holes and the through holes are arranged in a one-to-one correspondence manner;
the pressing assembly further comprises a pressing rod 14 and a locking piece 13, one end of the pressing rod 14 is arranged in the connecting hole, and the other end of the pressing rod 14 penetrates through the through hole to be detachably connected with the locking piece 13; the locking piece 13 is abutted to the outer edge of the through hole.
The first and second hold-down elements are locked by means of the locking element 13, so that the lamination stack 3 is fixed.
Optionally, the connecting hole is a threaded hole formed in the first pressing piece; the pressure lever 14 is a screw, and the locking piece 13 is a nut matched with the screw; one end of the screw rod is meshed in the threaded hole, the other end of the screw rod penetrates through the through hole and is connected with the nut, and the nut abuts against the outer edge of the through hole.
Specifically, the threaded holes are formed in the first positioning ring 4 and are uniformly arranged along the circumferential direction of the first positioning hole 24, and preferably, the number of the threaded holes is four; the through holes are formed in the third positioning ring 12 and are evenly distributed along the circumferential direction of the second assembling holes 11, and the through holes correspond to the threaded holes one to one.
Alternatively, the pressure lever 14 may be welded to the connection hole, or the like.
In an alternative embodiment, the radial positioning element 1 comprises a base 9, a core 10 and a plurality of petals 6; the petal bodies 6 are uniformly arranged on the base 9 along the circumferential direction of the shaft hole, the petal bodies 6 are provided with fixed ends and free ends which are opposite along the axial direction, the fixed ends are connected with the base 9, the petal bodies 6 are enclosed to form a positioning cavity 8 with an opening 7 at one end, and the opening 7 is positioned at the free end; the inner wall of the positioning cavity 8 has a taper along the axial direction, and the axial section size of the positioning cavity 8 is gradually reduced along the direction from the free end to the fixed end; the core body 10 is in a circular truncated cone shape and is matched with the positioning cavity 8.
The inner wall of the positioning cavity 8 is a conical surface, the valve bodies 6 are mutually independent so as to increase the deformation of the valve bodies after the insertion of the core bodies 10, the outer wall surfaces of the valve bodies 6 and the hole wall of the shaft hole are in clearance fit, the valve bodies are in interference fit with the hole wall of the shaft hole after being plugged into the deformation expansion along with the core bodies 10, the shaft hole is driven to be in coaxial fit with the radial positioning piece 1, the center of the bottom of the axial positioning piece 2 is provided with a through hole threaded hole 16, and the core bodies 10 can be reversely ejected out of the positioning cavity 8 through a screw.
In another aspect, the present invention provides a rotor lamination assembly method, comprising the steps of:
s1: placing the axial positioning piece 2 on a horizontal platform, placing the first pressing piece on the axial positioning piece 2, and enabling the radial positioning piece 1 to penetrate through the first assembling hole 15 of the first pressing piece;
s2: the lamination group 3 is placed on the first pressing piece, and the radial positioning piece 1 penetrates through the shaft hole of the lamination group 3;
s3: the core body 10 is placed into the positioning cavity 8 of the radial positioning piece 1, the radial positioning piece 1 is extruded outwards through the core body 10, so that the radial positioning piece 1 expands, the radial positioning piece 1 extrudes the lamination group 3 outwards in the shaft hole, and the lamination group 3 is centered;
s4: placing a second pressing piece on the lamination group 3, enabling the radial positioning piece 1 to penetrate through a second assembling hole 11 of the second pressing piece, and connecting the second pressing piece with the first pressing piece, so that the first pressing piece and the second pressing piece axially extrude the lamination group 3;
s5: taking out the core body 10, retracting the radial positioning piece 1, and extracting the radial positioning piece 1 from the shaft hole;
s6: heating the lamination stack 3, and sleeving the lamination stack 3 on the rotor 26;
s7: sleeving a pressing sleeve 25 into the end part of the rotor 26, wherein the pressing sleeve 25 abuts against the second pressing part, so that one end of the laminated stack 3 abuts against a shaft joint of the rotor 26;
s8: the compression sleeve 25, the second compression member and the first compression member are removed in sequence.
The method comprises the following specific steps: firstly, the method comprises the following steps: in the assembly process of the lamination set 3, as shown in fig. 1, an axial positioning piece 2 is placed on a horizontal platform, a first positioning ring 4 is placed on the upper end surface of the axial positioning piece 2, a radial positioning piece 1 penetrates through a first positioning hole 24, a second positioning ring 5 is placed in the first positioning hole 24, the radial positioning piece 1 penetrates through a first assembly hole 15, a second bulge 21 of the second positioning ring 5 abuts against a first bulge 23 in the first positioning hole 24 to be positioned, the laminations of the lamination set 3 are sequentially assembled on a first groove body of the second positioning ring 5, the radial positioning piece 1 penetrates through each shaft hole at the moment, finally, a bottom positioning ring 17 is matched with the first groove body, and the bottom positioning ring 17, magnetic bearing laminations 18, magnetic bearing lamination compression rings 19, sensor laminations 27 and sensor lamination compression rings 20 are sequentially stacked from bottom to top; as shown in fig. 2, the core body 10 is placed into the positioning cavity 8 from the opening 7 of the radial positioning member 1, the core body 10 presses the petal body 6, so that the petal body 6 is pressed and deformed to be expanded, and the petal body 6 presses the hole wall of the shaft hole when being expanded, thereby achieving the effect of centering the lamination; after the lamination group 3 is centered, a third positioning ring 12 is assembled to the top of the lamination group 3, a radial positioning piece 1 penetrates through a second assembling hole 11, a sensor lamination pressing ring 20 is matched with a second groove body, a screw rod penetrates through a through hole to be connected with a threaded hole, then a nut is screwed into the screw rod, and the nut is loosened for adjustment if the conditions that the number of laminations is assembled with deviation, foreign bodies are mixed between the laminations or gaps exist, the sequence of the laminations and the pressing ring has deviation and the like are found; as shown in fig. 3, the core 10 is taken out of the positioning cavity 8, so that the flap body 6 is contracted, and the radial positioning member 1 is drawn out from the axial hole, and at this time, the lamination set 3, the first positioning ring 4, the second positioning ring 5 and the third positioning ring 12 form an assembly;
secondly, the method comprises the following steps: in the process of assembling the lamination group 3 and the rotor 26, the lamination group 3 is heated to expand integrally and then sleeved on the rotor 26, as shown in fig. 6, when the lamination group 3 is not cooled, a pressing sleeve 25 is arranged at the end part of the rotor 26, the pressing sleeve 25 is abutted against the third positioning ring 12, and the pressing sleeve 25 is pressed by a press machine to sufficiently press the laminations and the pressing ring without gaps; the nut is loosened, the third positioning ring 12 is removed, then the first positioning ring 4 is axially separated from the second positioning ring 5, at this time, two half rings of the second positioning ring 5 can be independently removed, the inner diameter of the first positioning hole 24 of the first positioning ring 4 is larger than the outer diameters of the rotor 26 and the lamination group 3, the first positioning ring 4 is axially separated from the rotor 26, and finally the matching state of the rotor 26 and the lamination group 3 is formed as shown in fig. 7.
Wherein the lamination stack 3 is sleeved on the rotor 26 after being heated to expand the whole. And then the pressing sleeve 25 is sleeved, and equipment such as a press machine is arranged at one end of the pressing sleeve 25 far away from the lamination stack 3, so that pressure is applied to the pressing sleeve 25, and then pressure welding is completed, namely the installation of the lamination stack 3 is completed.
In the description of the embodiments of the present invention, 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 meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that the following embodiments are merely illustrative of the present invention, and not restrictive, and the scope of the present invention is not limited thereto: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A positioning tool is characterized by comprising an expansion assembly and a compression assembly;
the expansion assembly comprises an axial positioning piece (2) and a radial positioning piece (1), the radial positioning piece (1) can penetrate through a shaft hole of the lamination stack (3), the radial positioning piece (1) can generate radial acting force on the shaft hole wall of the shaft hole, the radial positioning piece (1) is provided with a first end and a second end which are opposite to each other along the axial direction of the lamination stack (3), and the first end of the radial positioning piece (1) is connected with the axial positioning piece (2);
the compressing assembly is detachably matched with the lamination stack (3), the compressing assembly comprises a first compressing part and a second compressing part which are oppositely arranged, the first compressing part comprises a second positioning ring (5), the second positioning ring (5) is arranged on the axial positioning piece (2), and meanwhile, the radial positioning piece (1) is positioned in the second positioning ring (5);
the lamination group (3) is arranged between the second pressing piece and the second positioning ring (5), and two ends of the lamination group (3) are respectively abutted against the second pressing piece and the second positioning ring (5);
the second positioning ring (5) comprises a plurality of connecting parts (22), any two adjacent connecting parts (22) are detachably connected, and all the connecting parts (22) are sequentially connected to form the second positioning ring (5).
2. The positioning tool according to claim 1, characterized in that the second pressing piece is provided with a second assembly hole (11), and the second positioning ring (5) is provided with a first assembly hole (15);
the first end of the radial positioning piece (1) penetrates through the first assembling hole (15), and the second end of the radial positioning piece (1) penetrates through the second assembling hole (11).
3. The positioning tool according to claim 2, characterized in that the first pressing member further comprises a first positioning ring (4), one side end surface of the first positioning ring (4) is matched with the axial positioning member (2), the first positioning ring (4) is provided with a first positioning hole (24), the second positioning ring (5) is provided with the first assembling hole (15), the second positioning ring (5) is positioned in the first positioning hole (24), and the first positioning ring (4) exerts an acting force on the second positioning ring (5) along the direction from the first end to the second end;
the second positioning ring (5) is provided with a first groove body, the first groove body is arranged along the circumferential direction of the first assembling hole (15), and the first groove body is provided with a first groove ring surface which can be attached to the outer ring surface of the lamination set (3) and a first groove end surface which can be attached to the end surface of the lamination set (3).
4. The positioning tool according to claim 3, wherein a first protruding portion (23) is provided on a hole wall of the first positioning hole (24), a second protruding portion (21) is provided on an outer annular surface of the second positioning ring (5), and the first protruding portion (23) and the second protruding portion (21) are in axial abutment.
5. The positioning tool according to claim 2, characterized in that the second pressing piece comprises a third positioning ring (12), the third positioning ring (12) is provided with the second assembly hole (11) and a second groove body, the second groove body is arranged along the circumferential direction of the second assembly hole (11), and the second groove body is provided with a second groove ring surface which can be attached to the outer ring surface of the lamination stack (3) and a second groove end surface which can be attached to the end surface of the lamination stack (3).
6. The positioning tool according to claim 1, wherein a plurality of connecting holes are formed in the first pressing piece, a plurality of through holes are formed in the second pressing piece, and the connecting holes and the through holes are arranged in a one-to-one correspondence manner;
the pressing assembly further comprises a pressing rod (14) and a locking piece (13), one end of the pressing rod (14) is arranged in the connecting hole, and the other end of the pressing rod (14) penetrates through the through hole to be detachably connected with the locking piece (13);
the locking piece (13) is abutted to the outer edge of the through hole.
7. The positioning tool according to claim 6, wherein the connecting hole is a threaded hole formed in the first pressing member;
the pressure lever (14) is a screw rod, and the locking piece (13) is a nut matched with the screw rod;
one end of the screw rod is meshed in the threaded hole, the other end of the screw rod penetrates through the through hole and is connected with the nut, and the nut abuts against the outer edge of the through hole.
8. The positioning tool according to any one of claims 1 to 7, characterized in that the radial positioning element (1) comprises a base (9), a core body (10) and a plurality of petals (6); the valve bodies (6) are uniformly arranged on the base (9) along the circumferential direction of the shaft hole, the valve bodies (6) are provided with opposite fixed ends and free ends along the axial direction, the fixed ends are connected with the base (9), the valve bodies (6) are enclosed to form a positioning cavity (8) with an opening (7) at one end, and the opening (7) is located at the free end; the inner wall of the positioning cavity (8) has taper along the axial direction, and the axial section size of the positioning cavity (8) is gradually reduced along the direction from the free end to the fixed end; the core body (10) is in a circular truncated cone shape and is matched with the positioning cavity (8).
9. A method of assembling rotor laminations, comprising the steps of:
s1: placing an axial positioning piece (2) on a horizontal platform, placing a first pressing piece on the axial positioning piece (2), and enabling a radial positioning piece (1) to penetrate through a first assembling hole (15) of the first pressing piece;
s2: the lamination stack (3) is placed on the first pressing piece, and the radial positioning piece (1) penetrates through a shaft hole of the lamination stack (3);
s3: the core body (10) is placed into a positioning cavity (8) of the radial positioning piece (1), the radial positioning piece (1) is extruded outwards through the core body (10), so that the radial positioning piece (1) expands, the radial positioning piece (1) extrudes the lamination set (3) outwards in the shaft hole, and the lamination set (3) is centered;
s4: placing a second pressing piece on the lamination group (3), enabling the radial positioning piece (1) to penetrate through a second assembling hole (11) of the second pressing piece, and connecting the second pressing piece with the first pressing piece, so that the first pressing piece and the second pressing piece axially extrude the lamination group (3);
s5: taking out the core body (10), retracting the radial positioning piece (1), and extracting the radial positioning piece (1) from the shaft hole;
s6: heating the lamination stack (3), and sleeving the lamination stack (3) on the rotor (26);
s7: sleeving a compression sleeve (25) from the end part of the rotor (26), wherein the compression sleeve (25) abuts against the second compression piece, so that one end of the laminated stack (3) abuts against a shaft joint of the rotor (26);
s8: the compression sleeve (25), the second compression piece and the first compression piece are sequentially detached.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111607151.XA CN113991947B (en) | 2021-12-27 | 2021-12-27 | Positioning tool and rotor lamination assembling method |
| PCT/CN2023/078146 WO2023126022A1 (en) | 2021-12-27 | 2023-02-24 | Positioning tool and rotor lamination assembling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111607151.XA CN113991947B (en) | 2021-12-27 | 2021-12-27 | Positioning tool and rotor lamination assembling method |
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| CN113991947A true CN113991947A (en) | 2022-01-28 |
| CN113991947B CN113991947B (en) | 2022-03-08 |
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| CN202111607151.XA Active CN113991947B (en) | 2021-12-27 | 2021-12-27 | Positioning tool and rotor lamination assembling method |
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| Country | Link |
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| CN (1) | CN113991947B (en) |
| WO (1) | WO2023126022A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023126022A1 (en) * | 2021-12-27 | 2023-07-06 | 天津飞旋科技股份有限公司 | Positioning tool and rotor lamination assembling method |
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| Publication number | Publication date |
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| WO2023126022A1 (en) | 2023-07-06 |
| CN113991947B (en) | 2022-03-08 |
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