CN110556984B - Assembling method of magnetic steel with dovetail structure - Google Patents
Assembling method of magnetic steel with dovetail structure Download PDFInfo
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- CN110556984B CN110556984B CN201810535209.6A CN201810535209A CN110556984B CN 110556984 B CN110556984 B CN 110556984B CN 201810535209 A CN201810535209 A CN 201810535209A CN 110556984 B CN110556984 B CN 110556984B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
Abstract
The invention discloses an assembly method of magnetic steel with a dovetail structure, which is suitable for a large motor with a plurality of groups of rotor dovetail grooves for mounting the magnetic steel evenly distributed on a motor rotor, and comprises the steps of mounting a bracket corresponding to the height of the rotor dovetail grooves, mounting a motor assembly tool, pushing the magnetic steel into the rotor dovetail grooves by the motor assembly tool, wherein opposite poles are arranged between two adjacent groups of magnetic steel of the motor rotor, and the magnetic steel adopts the following pushing sequence: the magnetic steel of whole homopolarity is pushed earlier, the magnetic steel of another polarity is pushed again, after pushing first department magnetic steel, push the magnetic steel of relative position department on the rotor again, later choose two places magnetic steel that have minimum contained angle again, push next group at the angular bisector department of this minimum contained angle with the magnetic steel of relative position installation, and analogize with this until all the magnetic steel of same polarity of installation, install heteropolar magnetic steel with same mode again, thereby the problem that the quality heavy disturbance that meets when having solved dovetail structure magnetic steel installation is big.
Description
Technical Field
The invention belongs to the field of motor manufacturing, and particularly relates to an assembling method of magnetic steel with a dovetail structure.
Background
At present, the permanent magnet steel of the motor is mainly applied to the magnetic poles of the stator or the rotor of the motor, because the stator does not participate in rotation, the magnetic poles of the stator are mostly installed in an opening or a semi-open slot, the magnetic poles are installed in a guiding mode by using a tool during installation, the magnetic poles of the rotor need to participate in rotation, so that the rotor must be well fixed, at present, the permanent magnet steel of the motor is mainly fixedly installed in a form of adding a protection ring to the opening or the semi-open slot, the magnetic pole installation process is mature under the condition that the guiding tool exists, the installation of the dovetail structure (double dovetail) steel of a certain large motor is more complex, the steel of the large motor is not directly installed inside a shaft or an iron core, the steel is installed on the surface of the shaft by using the dovetail to limit and install, and the installation of the steel of.
Disclosure of Invention
The invention provides an assembly method of magnetic steel with a dovetail structure, which can solve the problem that a large motor adopting a rotor dovetail groove structure is difficult to accurately install and position due to serious mutual interference caused by overlarge magnetic steel, and solves the technical problem in the following way:
a method for assembling magnetic steel with a dovetail structure is suitable for a large motor with a plurality of groups of rotor dovetail grooves for mounting the magnetic steel evenly distributed on a motor rotor, and comprises the following steps:
step 1: removing an end cover and a protective sleeve of the motor to expose the rotor, and installing a bracket corresponding to the rotor dovetail groove on the rotor at the shaft extension end of the motor;
step 2: fixing the rear end of the magnetic steel assembling tool on the bracket, wherein the outlet of the front end faces a rotor dovetail groove of the motor rotor;
and step 3: push the magnet steel through magnet steel erecting tool in the rotor dovetail groove, two sets of adjacent magnet steels are heteropolar on the electric motor rotor, and the magnet steel adopts following step to push: firstly, pushing all the magnetic steels with the same polarity in the following sequence, namely, rotating a rotor until a rotor dovetail groove is aligned with a front end outlet of a magnetic steel assembling tool, fixing the front end outlet and the rotor, pushing the first magnetic steel, removing the fixation between the front end outlet and the rotor, rotating the rotor until the front end outlet of the magnetic steel assembling tool is aligned with a rotor dovetail groove on the rotor opposite to the first magnetic steel, pushing the second magnetic steel, then selecting a perpendicular bisector of a connecting line of the first magnetic steel and the second magnetic steel, installing a third magnetic steel and a fourth magnetic steel on the rotor through the rotor dovetail groove at the position of the perpendicular bisector, comparing included angles formed by rotor dovetail grooves of any two installed magnetic steels and the circle center of the rotor, selecting a minimum included angle, taking an angular bisector of the included angle, pushing the magnetic steels at a group of rotor dovetail grooves closest to the angular bisector in the same way through the magnetic steel assembling tool, and the like until all the magnetic steels with the same polarity are installed, and then the different-pole magnetic steels are installed in the same way, so that all the magnetic steel installation operations are completed.
As a preferred embodiment of the present invention, the end cover and the protection cover of the motor adopt a detachable upper and lower flap type structure, a joint surface between the upper and lower flaps of the end cover is a flat plane, and the specific steps of the mounting of the bracket are as follows: the end cover and the upper segment of the protective cover are firstly lifted to expose the motor rotor, and the support rod of the support is arranged on the binding surface of the end cover of the lower segment, so that the support corresponds to the dovetail groove of the motor rotor in height.
As a preferred embodiment of the present invention, the magnetic steel assembling tool includes a guide rail plate, the guide rail plate has a first end portion attached to the motor rotor, the top surface of the guide rail plate is provided with two guide dovetail grooves axially parallel to the guide rail plate, the magnetic steel assembling tool further includes a second end portion fixed with a limit baffle perpendicular to the top surface thereof, one side of the limit baffle facing the rotor is provided with a push member capable of axially sliding along the guide dovetail grooves, one side of the limit baffle facing away from the rotor is fixed with a cylinder capable of axially extending and retracting along the guide rail plate, the cylinder and the push member are connected by an extendable push rod, the push member is connected with the magnetic steel, and the step of installing the magnetic steel assembling tool is specifically as follows: and after the alignment is finished, the magnetic steel assembling tool is installed and fixed on a support which is arranged in advance.
As a preferred embodiment of the present invention, the step of pushing in the magnetic steel is specifically as follows: the magnetic steel is placed at the first end part of the guide rail plate, then the pushing piece is connected with the air cylinder through the push rod, the air cylinder drives the magnetic steel to push the rotor, after the magnetic steel is pushed to a certain depth, the air cylinder returns backwards, the extended sub-push rod is added on the push rod, the air cylinder is driven again to push the magnetic steel forwards, and the operation is repeated until the magnetic steel reaches the installation position.
As a preferred embodiment of the invention, the method also comprises the step of arranging an installation site for the motor before the magnetic steel is assembled, and the specific steps comprise that platforms with the height equal to the central height of the motor, the width slightly larger than the motor and the length more than three meters from the axial extension end and the non-axial extension end of the motor are built on two axial sides of the motor, stairs are arranged on the edges of the platforms, guardrails are built, and an empty site which is equivalent to the floor area of the motor is arranged outside the platforms.
As a preferred embodiment of the present invention, rotor dovetail grooves on a rotor of a motor are matched with magnetic steel dovetails, bolt holes into which bolts can extend are formed in the bottoms of the rotor dovetail grooves, so that the magnetic steel is fixed in the rotor dovetail grooves, a plurality of magnetic steels are arranged in each rotor dovetail groove, when the magnetic steel dovetail grooves are installed, the bolts are completely screwed after the first magnetic steel is pushed in, then the pushed magnetic steel only screws the bolts but not screws in the pushing-in process, each magnetic steel is in a free state of incomplete fitting, and after the last magnetic steel is installed, the magnetic steel fixing bolts are screwed one by one and apply torque.
In conclusion, the dovetail structure magnetic steel assembling method can effectively solve the problem of inconvenient installation caused by serious mutual interference due to overlarge magnetic steel in the large motor assembling process.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic view of a dovetail slot with magnetic steel mounted thereon in accordance with the present invention;
FIG. 2 is a schematic diagram of the process of pushing the motor into the magnetic steel in the present invention;
FIG. 3 is a schematic diagram of the process of pushing the motor into the magnetic steel in the present invention;
FIG. 4 is a schematic view of a magnetic steel assembly tool of the present invention;
fig. 5 is a schematic diagram of the process of pushing the motor into the magnetic steel in the invention.
Wherein: 100-magnet steel assembly tool, 200-bracket, 300-protective cover, 400-end cover, 500-magnet steel, 600-rotor dovetail groove, 601-bolt hole, 201-support bar, 401-abutting surface, 101-first end part, 102-guide rail plate, 103-limit baffle, 104-pushing piece, 105-cylinder, 106-push rod, 107-guide dovetail groove.
Detailed Description
The invention is further illustrated by the following specific embodiments:
the invention mainly aims at a large motor which adopts a rotor dovetail groove 600 to install magnetic steel 500, the installation structure of the magnetic steel 500 is shown in figure 1, a plurality of groups of rotor dovetail grooves 600 which are evenly distributed are arranged on a motor rotor, the rotor dovetail grooves 600 are matched with the dovetails of the magnetic steel 500, and bolt holes 601 which can be inserted by bolts are arranged at the bottom of the rotor dovetail grooves 600, so that the magnetic steel 500 is fixed in the rotor dovetail grooves 600.
As shown in fig. 2, 3 and 5, the method for assembling magnetic steel with dovetail structure of the present invention mainly includes three steps, i.e., setting a magnetic steel installation site for a motor requiring to install magnetic steel 500, installing an assembling tool on the motor, and pushing the magnetic steel 500 into a rotor dovetail slot 600.
Because the most of magnet steel 500 that need install is large-scale motor, the concrete step in magnet steel installation place includes that the axial both sides at the motor build the central height that highly equals the motor, and the width slightly is greater than the motor, and length is for being greater than the axle extension end and the platform of the three meters of non-axle extension end of motor.
In order to facilitate the disassembly, the platform is of a wood structure, the edge of the platform is provided with an escalator which can be used for people to go up and down so as to facilitate the up-and-down operation, and the periphery of the platform is surrounded by guardrails, so that the operation safety is ensured, and personal accidents are prevented.
The magnetic steel installation site needs to be close to a compressed air source, and a position where a travelling crane can be adjusted in time needs to be arranged due to the turning requirement. Except the motor, the place of assembly place and place the platform, still need an open space to be used for the interim before magnet steel 500 installation to place, the size of open space with motor length, width similar can, the place need enclose with the warning.
The step of mounting the assembling tool on the motor comprises mounting a bracket 200 on the motor, placing the magnetic steel assembling tool 100 on the bracket 200, and performing trial pushing by using nonmagnetic experimental magnetic steel, however, the step of performing trial pushing by using nonmagnetic experimental magnetic steel 500 is not a necessary step, and is only one preferred step.
Before the support 200 is installed, firstly, the protective cover 300 and the end cover 400 of the motor need to be opened to expose the motor rotor inside, the protective cover 300 and the end cover 400 adopt a detachable design divided into an upper half and a lower half, the upper half of the protective cover 300 and the end cover 400 are opened during installation to expose a binding surface 401 between the lower half end cover 400 and the upper half end cover 400, the binding surface 401 is a flat plane, a threaded hole capable of installing the support rod 201 is preset on the binding surface 401 of the end cover 400, the support rod 201 is installed at four corners of the binding surface 401 of the end cover 400 through the threaded hole, and the support 200 is fixed on the support rod 201 and corresponds to the height of the rotor dovetail groove 600.
As shown in fig. 4, the magnetic steel assembling tool 100 includes a guide rail plate 102, the guide rail plate 102 has a first end 101 attached to a rotor of the motor, two guide dovetail grooves 107 axially parallel to the guide rail plate 102 are formed on a top surface of the guide rail plate 102, and a second end to which a limit baffle 103 perpendicular to the top surface is fixed, a pushing member 104 capable of axially sliding along the guide dovetail grooves 107 is arranged on a side of the limit baffle 103 facing the rotor, an air cylinder 105 capable of axially extending and retracting along the guide rail plate 102 is fixed on a surface of the limit baffle 103 facing away from the rotor, the air cylinder 105 and the pushing member 104 are connected by an extendable push rod 106, and the pushing member 104 is connected with a magnetic steel 500.
During installation, the magnetic steel assembling tool 100 is hoisted by a crane, so that the guide dovetail groove 107 of the magnetic steel assembling tool 100 is aligned with the rotor dovetail groove 600 of the motor rotor, and after the alignment is finished, the magnetic steel assembling tool 100 is installed and fixed on the support 200 which is arranged in advance, so that the installation step of the whole magnetic steel assembling tool 100 is completed.
For convenient location during the installation, when magnet steel erecting tool 100 aligns with rotor dovetail slot 600, can install two stainless steel long screw rods in advance on the motor shaft and carry out preliminary location, on installing magnet steel erecting tool 100 on motor rotor tentatively under the guide effect of these two long screw rods, accomplish whole installation operation with motor erecting tool's rear end on support 200 afterwards.
Pushing the magnetic steel 500 into the rotor dovetail slot 600 on the motor rotor includes the following steps: the magnetic steel 500 is placed at the first end part 101 of the guide rail plate 102, then the pushing piece 104 is connected with the air cylinder 105 through the push rod 106, the air cylinder 105 drives the magnetic steel 500 to push the rotor, after the rotor is pushed to a certain depth, the air cylinder 105 retreats backwards, the push rod 106 is provided with the extended sub-push rod 106, the air cylinder 105 is driven again to push the magnetic steel 500 forwards, and the steps are repeated until the magnetic steel 500 reaches the installation position.
Consider magnet steel 500 to paste the influence of back expend with heat and contract with cold, all be equipped with polylith magnet steel 500 in every rotor dovetail groove 600 of electric motor rotor, during the installation, the bolt is screwed completely after pushing first magnet steel 500, magnet steel 500 that later pushes only with bolt screw in but not screw in the push-in process, let every magnet steel 500 be in a not completely laminated free state (because the repulsion between magnet steel 500, make it have certain adjustable clearance), treat that last magnet steel 500 installs the back that finishes, screw magnet steel 500 fixing bolt one by one again and exert moment.
In this embodiment, even number of groups of magnetic steels 500 are equally distributed on the rotor of the motor, an opposite pole is provided between two adjacent magnetic steels 500, and in order to prevent interference between two adjacent pairs of magnetic steels 500 on the rotor and balance the weight, the magnetic steels 500 are assembled in the following order: firstly, pushing all the magnetic steels with the same polarity in the following sequence, namely pushing a first magnetic steel 500, rotating a rotor until an outlet at the front end of the magnetic steel assembling tool 100 aligns at a rotor dovetail groove 600 on the rotor, which is opposite to the first magnetic steel, pushing a second magnetic steel 500, then selecting a perpendicular bisector of a connecting line of the first magnetic steel and the second magnetic steel, installing a third magnetic steel and a fourth magnetic steel on the rotor through the rotor dovetail groove 600 at the position of the perpendicular bisector, then comparing included angles formed by the rotor dovetail grooves 600 of any two installed magnetic steels 500 and the circle center of the rotor, selecting a minimum included angle, taking an angular bisector of the included angle, pushing the magnetic steel 500 in the same way through the magnetic steel assembling tool 100 until all the magnetic steels 500 with the same polarity are installed, and then installing the heteropolar magnetic steels 500 in the same way, and finishing all magnetic steel mounting operations.
After the magnetic steel 500 is installed at one position, the fixation between the outlet at the front end of the magnetic steel installation tool and the motor rotor is released, and turning is carried out. After the rotor disc reaches the opposite pole, the installation magnetic steel installation tool is installed again to push the next magnetic steel 500, oil needs to be conducted on the bearing firstly during turning, turning is conducted after the end face of the shaft is wound through the travelling crane, and the turning process needs to be smooth and continuous.
After all the magnetic poles are installed, slowly turning the vehicle, observing the installation condition of the magnetic steel 500, listening whether abnormal sound exists or not, and finishing the assembly of the magnetic steel 500 after confirming that no abnormal sound exists.
By adopting the installation mode, the mutual interference among the magnetic steels 500 can be reduced to the minimum, the self-rotation torque caused by uneven weight of the rotor is also the minimum during installation, the rotor is not easy to displace during installation of the magnetic steels 500, and the occurrence of installation interference is reduced.
In conclusion, the dovetail structure magnetic steel assembling method can effectively solve the problem of inconvenient installation caused by serious mutual interference due to overlarge magnetic steel 500 in the large motor assembling process.
However, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present invention, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims, provided they fall within the true spirit of the present invention.
Claims (6)
1. The assembling method of the magnetic steel with the dovetail structure is suitable for a large motor with a plurality of groups of rotor dovetail grooves (600) for mounting the magnetic steel (500) evenly distributed on a motor rotor, and is characterized in that an end cover (400) and a protective cover (300) of the motor adopt a detachable upper and lower two-petal type structure, a binding surface (401) between the upper and lower two petals of the end cover (400) is a flat plane, and the assembling method comprises the following steps:
step 1: firstly, opening the upper petals of the end cover (400) and the protective cover (300) to expose the motor rotor, and installing a bracket (200) on a binding surface (401) of the lower petal end cover (400) to ensure that the height of the bracket (200) corresponds to that of the rotor dovetail groove (600);
step 2: fixing the rear end of the magnetic steel assembling tool (100) on the bracket (200), wherein the front end outlet faces the rotor dovetail groove (600);
and step 3: push magnet steel (500) through magnet steel assembling tool (100) in rotor dovetail groove (600), last adjacent two sets of magnet steel (500) of electric motor rotor is heteropole, and magnet steel (500) adopt following step to push: firstly, the magnetic steels (500) with the same polarity are pushed in according to the following sequence that a rotor is rotated to one rotor dovetail groove (600) to align with the front end outlet of a magnetic steel assembling tool (100), the front end outlet and the rotor are fixed, after the first magnetic steel (500) is pushed in, the fixation between the front end outlet and the rotor is released, the rotor is rotated to the front end outlet of the magnetic steel assembling tool (100) to align with the rotor dovetail groove (600) opposite to the first magnetic steel (500), the second magnetic steel (500) is pushed in, then the perpendicular bisector of the connecting line of the first magnetic steel and the second magnetic steel is selected, the third magnetic steel (500) and the fourth magnetic steel (500) are installed on the rotor dovetail groove (600) passing through the perpendicular bisector, then the included angle formed by the rotor dovetail grooves (600) and the circle center of the rotor of any two installed magnetic steels (500) is compared, the minimum included angle is selected, and the bisector of the included angle is taken, and pushing the magnetic steel (500) into a group of rotor dovetail grooves (600) which are closest to the angular bisector on the rotor in the same way through a magnetic steel assembling tool (100), and repeating the steps until all the magnetic steels (500) with the same polarity are installed, and then installing the heteropolar magnetic steel (500) in the same way to complete all the magnetic steel (500) installation operations.
2. A method of assembling dovetail structural magnetic steel as claimed in claim 1, wherein: magnet steel erecting tool (100) is including guide rail board (102), and guide rail board (102) have first end (101) with the laminating of electric motor rotor, be equipped with two guide dovetail groove (107) with guide rail board (102) axial direction parallel on the top surface of guide rail board (102), still including being fixed with rather than the second tip of top surface vertically limit baffle (103), limit baffle (103) are equipped with towards one side of rotor and can follow guide dovetail groove (107) axial sliding's pusher (104), limit baffle (103) one side of backing away from the rotor is fixed with and can follow guide rail board (102) axial telescopic cylinder (105), cylinder (105) and pusher (104) between connect through push rod (106) that can prolong, should push away piece (104) and link to each other with magnet steel (500).
3. A method of assembling dovetail structural magnetic steel as claimed in claim 2, wherein: the magnetic steel assembling tool (100) comprises the following steps: adopt driving handling magnet steel erecting tool (100), make first end (101) and the laminating of electric motor rotor terminal surface to make magnet steel erecting tool (100) lead dovetail groove (107) and electric motor rotor's rotor dovetail groove (600) to aim at, aim at the back of finishing, fix magnet steel erecting tool (100) on support (200).
4. A method of assembling dovetail structural magnetic steel as claimed in claim 2, wherein: the step of pushing in the magnetic steel (500) is as follows: place magnet steel (500) first end (101) of guide rail board (102), then will push away piece (104) through push rod (106) with cylinder (105) link to each other, cylinder (105) drive magnet steel pushes away the rotor, pushes away certain degree of depth after, and cylinder (105) are backward withdrawn, adds the sub-push rod of extension on push rod (106), drives cylinder (105) forward promotion magnet steel (500) again, so relapse until magnet steel (500) reach the mounted position.
5. A method of assembling dovetail structural magnetic steel as claimed in claim 3, wherein: rotor dovetail groove (600) and the dovetail of magnet steel (500) match, rotor dovetail groove (600) bottom is equipped with bolt hole (601) that can supply the bolt to stretch into to fix magnet steel (500) in rotor dovetail groove (600), all be equipped with polylith magnet steel (500) in every rotor dovetail groove (600), during the installation, the bolt of screwing completely after pushing first magnet steel (500), magnet steel (500) that later push only with bolt screw in but not screw in the push-in-process, let every magnet steel (500) be in the free state of an incomplete laminating, treat that last magnet steel (500) install the back that finishes, screw and apply moment with magnet steel (500) fixing bolt one by one again.
6. A method of assembling dovetail structural magnetic steel as claimed in claim 1, wherein: still include the step for the motor sets up the installation place before magnet steel (500) assembly, include: building platforms with the height equal to the center height of the motor, the width slightly larger than the motor and the length longer than three meters of the shaft extension end and the non-shaft extension end of the motor on the two axial sides of the motor; arranging stairs and building guardrails on the edges of the platforms; and an empty field which is equivalent to the occupied area of the motor is arranged beside the platform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810535209.6A CN110556984B (en) | 2018-05-30 | 2018-05-30 | Assembling method of magnetic steel with dovetail structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810535209.6A CN110556984B (en) | 2018-05-30 | 2018-05-30 | Assembling method of magnetic steel with dovetail structure |
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| CN110556984A CN110556984A (en) | 2019-12-10 |
| CN110556984B true CN110556984B (en) | 2021-07-02 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206135654U (en) * | 2016-10-12 | 2017-04-26 | 广东明阳风电产业集团有限公司 | Frock structure for installation of permanent magnet generator rotor permanent magnetic polar elements spare |
| CN106787510A (en) * | 2016-12-25 | 2017-05-31 | 中船重工电机科技股份有限公司 | Alinco assembled frock and its assembly method on permanent magnetism velocity modulation electric engine rotor |
| CN107681845A (en) * | 2017-10-26 | 2018-02-09 | 上海电气集团上海电机厂有限公司 | A kind of permanent magnet motor magnetic pole handling instrument |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7661185B2 (en) * | 2006-10-10 | 2010-02-16 | Canopy Technologies, Llc | Method for assembling rotor of permanent magnet motor |
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2018
- 2018-05-30 CN CN201810535209.6A patent/CN110556984B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206135654U (en) * | 2016-10-12 | 2017-04-26 | 广东明阳风电产业集团有限公司 | Frock structure for installation of permanent magnet generator rotor permanent magnetic polar elements spare |
| CN106787510A (en) * | 2016-12-25 | 2017-05-31 | 中船重工电机科技股份有限公司 | Alinco assembled frock and its assembly method on permanent magnetism velocity modulation electric engine rotor |
| CN107681845A (en) * | 2017-10-26 | 2018-02-09 | 上海电气集团上海电机厂有限公司 | A kind of permanent magnet motor magnetic pole handling instrument |
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