CN111669019B - Disassembly and assembly method for preventing over-positioning motor bearing from being disassembled - Google Patents
Disassembly and assembly method for preventing over-positioning motor bearing from being disassembled Download PDFInfo
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- CN111669019B CN111669019B CN202010574480.8A CN202010574480A CN111669019B CN 111669019 B CN111669019 B CN 111669019B CN 202010574480 A CN202010574480 A CN 202010574480A CN 111669019 B CN111669019 B CN 111669019B
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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
- H02K15/14—Casings; Enclosures; Supports
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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
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/06—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races
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Abstract
The invention discloses a disassembly and assembly method for preventing over-positioning motor bearings from being disassembled, which comprises the following steps: the rotating shaft is pushed along the axial direction to move for a preset distance so as to drive a far-end inner sealing ring fixed on the far-end surface of the rotating shaft to be abutted against the inner wall of the far-end cover in the axial direction; moving a movable support which is detachably connected with the inner wall of the near-end cover along the axial direction, and enabling the tail end of the movable support to be abutted against a near-end inner sealing ring fixed on the near-end surface of the rotating shaft; removing the positioning bearing assembly from the distal end of the shaft while removing the non-positioning bearing assembly from the proximal end of the shaft; and moving the movable support to the reset position along the axial direction, and installing a positioning bearing seat in the positioning bearing assembly and the distal end cover in place so as to enable the rotating shaft to reset along the axial direction. The disassembly and assembly method for preventing the over-positioning motor bearing from being disassembled can realize disassembly and assembly of the motor bearing without disassembly, improve the disassembly and assembly efficiency, avoid the over-positioning condition of the positioning bearing in the disassembly and assembly process and improve the product quality.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a disassembly and assembly method for preventing an over-positioning motor bearing from being disassembled.
Background
The bearing is a core component in the motor and is used for supporting the rotor to rotate and ensuring the stable operation of the motor. Its function determines that it is more susceptible to wear and requires periodic replacement. When the existing motor bearing is maintained and replaced, the motor is mostly required to be disassembled, a motor rotor is pulled out of the motor, and then the bearing is pulled out by using a specific device. The motor that disintegrates is consuming time longer to at the in-process of disintegration and reassembly, there is the risk that artificial misoperation caused the motor damage, bury down the quality hidden danger for the safe operation of motor.
The replacement process of the traditional motor bearing comprises the following steps: the motor is disassembled, the rotor is drawn out of the motor, the bearing is taken down from the rotating shaft by using a specific device, a new bearing is remounted to the rotating shaft by using a tool, the rotor is placed into the motor, and the motor is remounted. The whole replacement process is complex in operation and long in time consumption, the risk of motor damage exists, and potential quality hazards are buried for safe operation of the motor.
Currently, most motors adopt a two-bearing structure, that is, a positioning bearing (for example, a deep groove ball bearing or a cylindrical roller bearing with a flange, etc., which is called a positioning bearing because the inner ring and the outer ring are inseparable and can fix the rotor at the original designed position) is adopted at one end, and a non-positioning bearing (for example, a common cylindrical roller bearing, the inner ring and the outer ring are separable and are called a non-positioning bearing or a floating end bearing) is adopted at the other end. The motor is characterized in that the rotor is fixed by the positioning end bearing, the position of the rotor cannot be changed, and the position of the rotor can be correspondingly changed only when the positioning bearing changes the position, so that the positioning bearing is difficult to disassemble and assemble.
In the method for dismounting and mounting the positioning bearing in the prior art, two sets of complex tools are mainly used at two ends of a rotor for operation, the rotor is fixed through the tools in the whole dismounting process, and the position of the rotor is always kept unchanged. That is, the locating bearing has over-constraint or over-locating problems on the shaft. However, due to the manufacturing deviation of the parts, the assembling position relationship between the bearing seat and the end cover is changed with a high probability, which easily causes the problem of product quality due to the incorrect installation of the bearing.
Therefore, how to realize disassembly-free disassembly and replacement of the motor bearing, improve the disassembly and replacement efficiency, avoid the over-positioning condition of the positioning bearing in the disassembly and replacement process, and improve the product quality is a technical problem faced by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a disassembly and assembly method without disassembly for an over-positioning prevention motor bearing, which can realize disassembly and assembly of the motor bearing without disassembly, improve the disassembly and assembly efficiency, avoid over-positioning of the positioning bearing in the disassembly and assembly process and improve the product quality.
In order to solve the technical problem, the invention provides a disassembly and assembly method for preventing over-positioning motor bearings from being disassembled, which comprises the following steps:
the rotating shaft is pushed along the axial direction to move for a preset distance so as to drive a far-end inner sealing ring fixed on the far-end surface of the rotating shaft to be abutted against the inner wall of the far-end cover in the axial direction;
moving a movable support which is detachably connected with the inner wall of the near-end cover along the axial direction, and enabling the tail end of the movable support to be abutted against a near-end inner sealing ring fixed on the near-end surface of the rotating shaft;
removing the positioning bearing assembly from the distal end of the shaft while removing the non-positioning bearing assembly from the proximal end of the shaft;
and moving the movable support to a reset position along the axial direction, and installing a positioning bearing seat in the positioning bearing assembly and the distal end cover in place so as to enable the rotating shaft to reset along the axial direction.
Preferably, before the rotating shaft is pushed in the axial direction to move for a preset distance, the method further comprises:
and the output end of the driving part is abutted against the end face of one end of the rotating shaft.
Preferably, the axial pushing of the rotating shaft causes the rotating shaft to move a preset distance, specifically including:
and the rotating shaft is pushed by the output end of the driving component along the axial direction to move towards the end of the positioning bearing assembly by a preset distance.
Preferably, the axial pushing of the rotating shaft causes the rotating shaft to move a preset distance, specifically including:
and the output end of the driving part pushes the rotating shaft to move at a constant speed along the axial direction according to a preset feeding speed until a preset distance is reached.
Preferably, the driving of the inner seal ring and the inner wall of the distal end cap are axially abutted against each other, specifically comprising:
and driving the bevel edge of the outer edge of the inner seal ring to abut against the tail end of the extension plate on the inner wall of the distal end cover.
Preferably, before driving the inner seal ring and the inner wall of the distal end cap to axially abut against each other, further comprising:
and machining the outer edge bevel edge of the inner seal ring and the end of the extension plate of the far end cover so that the outer edge bevel edge surface of the inner seal ring and the end surface of the extension plate of the far end cover can be attached to each other.
Preferably, before driving the inner seal ring and the inner wall of the distal end cap to axially abut against each other, further comprising:
and adjusting the axial installation position of the far end cover on the rotor so that the axial clearance between the outer edge bevel edge of the inner seal ring and the tail end of the extension plate of the far end cover is smaller than the axial clearance between the outer surface of the inner seal ring and the inner wall of the positioning bearing seat.
Preferably, the movable support which is detachably connected with the inner wall of the proximal end cover along the axial direction comprises:
and inserting and installing a plurality of long bolts in a plurality of installation holes reserved on the near-end cover, and deepening the matching depth of the long bolts by directionally screwing the long bolts so as to enable the tail ends of the long bolts to be abutted against the movable support and push the movable support to move along the axial direction.
Preferably, the shape of the distal end surface of the movable support matches the shape of the surface of the proximal end inner sealing ring.
The disassembly and assembly method for preventing the over-positioning motor bearing from being disassembled mainly comprises four steps, wherein in the first step, the rotating shaft is pushed along the axial direction to move for a preset distance, and in the axial movement process of the rotating shaft, the distal end inner seal ring fixed on the surface of the distal end (the point close to the force application point is the proximal end, and vice versa) of the rotating shaft is driven to synchronously move with the rotating shaft, until the preset distance is reached, the distal end inner seal ring is mutually abutted with the inner wall of the distal end cover in the axial direction. At the moment, because the positioning bearing assembly is sleeved on the rotating shaft, when the rotating shaft moves axially, the positioning bearing assembly moves axially synchronously, so that a certain gap is generated between the positioning bearing seat in the positioning bearing assembly and the far-end cover, and the gap value is the preset distance value. In the second step, a movable support is detachably connected to the inner wall of the near-end cover, a near-end inner sealing ring is fixed on the near-end surface of the rotating shaft, and the tail end of the movable support is opposite to the near-end inner sealing ring and keeps a certain distance with the near-end inner sealing ring in a natural state. In this step, the movable support is moved in the axial direction so that the distal end of the movable support and the proximal end inner seal ring abut against each other. The axial both ends of pivot up to this point all with other structure butt, the axial motion degree of freedom of pivot is restricted, and the rotor is fixed in the axial. In a third step, once the shaft is secured, the current positioning bearing assembly can be removed at the distal end of the shaft and a new positioning bearing assembly can be reinstalled at the mounting location on the shaft. At the same time, the current non-locating bearing assembly is removed at the proximal end of the shaft and a new non-locating bearing assembly is then reinstalled at the installation location on the shaft. And in the fourth step, the movable support is moved along the axial direction until reset, so that the movable support is separated from the abutting of the near-end inner sealing ring, the axial near end of the rotating shaft removes the movement limitation, then the positioning bearing block in the positioning bearing assembly and the far-end cover are installed in place, the gap between the positioning bearing block and the far-end cover disappears after the positioning bearing block and the far-end cover are installed in place, and meanwhile, the rotating shaft gradually moves along the axial direction in the reverse direction until reset in the installation process. Therefore, the disassembly and assembly method for preventing the over-positioning motor bearing from being disassembled axially fixes the rotating shaft by utilizing the butt joint between the far-end inner seal ring and the far-end cover on the rotating shaft and the butt joint between the movable support and the near-end inner seal ring in a mode of axially moving the rotating shaft, so that the disassembly and assembly of the motor bearing can be avoided, the disassembly and assembly efficiency is improved, meanwhile, a certain gap is generated between the positioning bearing seat and the far-end cover by the axial movement of the rotating shaft before the bearing is disassembled and assembled, the gap can be used for the installation allowance of the positioning bearing assembly, the over-positioning condition of the positioning bearing in the disassembly and assembly process is avoided, and the product quality is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flow chart of an embodiment of the present invention.
Fig. 2 is a schematic structural view of a motor bearing not yet replaced according to an embodiment of the present invention.
Fig. 3 is a partial structural schematic diagram of fig. 2.
Fig. 4 is a schematic structural diagram of a motor bearing in a dismounting process according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a motor bearing after the motor bearing is removed and replaced according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of a positioning bearing seat according to an embodiment of the present invention after being installed in place.
Fig. 7 is a schematic structural diagram of a motor bearing in a dismounting process according to another embodiment of the present invention.
Fig. 8 is a schematic view of three abutting structures of the distal end inner seal ring and the distal end cap according to an embodiment of the present invention.
Among them, in fig. 2 to 8:
the rotor comprises a rotating shaft-1, a rotor core-2, a stator-3, a near-end inner seal ring-4, a near-end cover-5, a non-positioning bearing assembly-6, a positioning bearing-7, a far-end inner seal ring-8, a positioning bearing seat-9, a far-end cover-10, a movable support-11 and a long bolt-12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1, fig. 1 is a flowchart illustrating an embodiment of the present invention.
In a specific embodiment provided by the invention, the disassembly and assembly method for preventing the over-positioning motor bearing from being disassembled mainly comprises four steps, which are respectively as follows:
s1, the rotating shaft 1 is pushed in the axial direction to move for a preset distance so as to drive the distal end inner seal ring 8 fixed on the distal end surface of the rotating shaft 1 to be abutted against the inner wall of the distal end cover 10 in the axial direction;
s2, moving the movable support 11 which is detachably connected with the inner wall of the near-end cover 5 along the axial direction, and enabling the tail end of the movable support 11 to be abutted with the near-end inner sealing ring 4 fixed on the near-end surface of the rotating shaft 1;
s3, replacing the positioning bearing assembly at the far end of the rotating shaft 1, and simultaneously replacing the non-positioning bearing assembly 6 at the near end of the rotating shaft 1;
and S4, moving the movable support 11 in the axial direction to reset, and installing the positioning bearing seat 9 and the distal end cover 10 in the positioning bearing assembly in place to reset the rotating shaft 1 in the axial direction.
In the first step, the rotating shaft 1 is pushed in the axial direction to move a preset distance, and the rotating shaft 1 drives the distal inner seal ring 8 fixed on the surface of the distal end (the proximal end is close to the force application point, or the distal end is opposite) of the rotating shaft 1 to move synchronously with the rotating shaft 1 in the axial movement process, until the preset distance is reached, the distal inner seal ring 8 and the inner wall of the distal end cover 10 are abutted to each other in the axial direction. At this time, because the positioning bearing assembly is sleeved on the rotating shaft 1, when the rotating shaft 1 moves axially, the positioning bearing assembly will move axially synchronously, so that a certain gap (L) is generated between the positioning bearing seat 9 and the distal end cap 10 in the positioning bearing assembly, and the gap value is the preset distance value. Meanwhile, the rotor core 2 and the stator 3 are not aligned at the moment, and a certain axial distance exists. As shown in fig. 2 and 3, fig. 2 is a schematic structural view of a motor bearing in an embodiment of the present invention before being replaced. Fig. 3 is a partial structural schematic diagram of fig. 2.
In the second step, a movable support 11 is detachably connected to the inner wall of the proximal end cap 5, and a proximal end inner seal ring 4 is fixed to the proximal end surface of the rotating shaft 1, and the distal end of the movable support 11 is opposite to and spaced apart from the proximal end inner seal ring 4 in a natural state. In this step, the movable holder 11 is moved in the axial direction so that the distal end of the movable holder 11 and the proximal end inner seal ring 4 abut against each other. So far the axial both ends of pivot 1 all with other structure butt, the axial motion degree of freedom of pivot 1 is restricted, and the rotor is fixed in the axial. As shown in fig. 4, fig. 4 is a schematic structural diagram of a motor bearing in a dismounting process according to an embodiment of the present invention.
In a third step, after the rotating shaft 1 is fixed, the current positioning bearing assembly can be removed at the distal end position of the rotating shaft 1, and then a new positioning bearing assembly can be reinstalled at the installation position on the rotating shaft 1. At the same time, the current non-locating bearing assembly 6 is removed at the proximal position of the shaft 1 and then a new non-locating bearing assembly 6 is re-installed at the installation position on the shaft 1. Wherein the positioning bearing assembly mainly comprises a positioning bearing 7 and a positioning bearing seat 9, and the non-positioning bearing assembly 6 mainly comprises a non-positioning bearing and a non-positioning bearing seat. When the positioning bearing assembly is disassembled and replaced, the inner ring and the outer ring of the positioning bearing 7 cannot be separated, so the positioning bearing 7 and the positioning bearing seat 9 are firstly installed into a whole and then are integrally installed on the rotating shaft 1. When the non-positioning bearing assembly 6 is disassembled and replaced, the inner ring and the outer ring of the non-positioning bearing can be separated, so that the inner ring can be directly sleeved on the rotating shaft 1, and the outer ring is integrally installed on the inner ring of the rotating shaft 1 after being integrally installed with the non-positioning bearing assembly. As shown in fig. 5, fig. 5 is a schematic structural diagram of a motor bearing after the motor bearing is disassembled and replaced according to an embodiment of the present invention.
In the fourth step, the movable support 11 is moved in the axial direction until reset, so that the movable support is separated from the abutting of the near-end inner seal ring 4, at the moment, the axial near end of the rotating shaft 1 is free from movement limitation, then the positioning bearing seat 9 and the far-end cover 10 in the positioning bearing assembly are installed in place, a gap between the positioning bearing seat 9 and the far-end cover 10 disappears after the positioning bearing seat is installed in place, and meanwhile, in the installation process, the rotating shaft 1 gradually moves in the axial direction in the reverse direction until reset, so that the rotor core 2 is aligned with the stator 3. Fig. 6 is a schematic structural view of a positioning bearing seat 9 according to an embodiment of the present invention, as shown in fig. 6.
Therefore, the disassembly and assembly method for preventing the over-positioning motor bearing from being disassembled axially fixes the rotating shaft 1 by utilizing the butt joint between the far-end inner seal ring 8 and the far-end cover 10 on the rotating shaft 1 and the butt joint between the movable support 11 and the near-end inner seal ring 4 in a mode of axially moving the rotating shaft 1, so that the disassembly and assembly of the motor bearing can be avoided, the disassembly and assembly efficiency is improved, meanwhile, a certain gap is generated between the positioning bearing seat 9 and the far-end cover 10 by the axial movement of the rotating shaft 1 before the bearing is disassembled and assembled, the gap can be used for the installation allowance of the positioning bearing assembly, the over-positioning condition of the positioning bearing 7 in the disassembly and assembly process is avoided, and the product quality is improved.
In addition, before the rotating shaft 1 is pushed in the axial direction to move for a preset distance, the output end of the driving part can be abutted against the end face of one end of the rotating shaft 1, so that the output end of the driving part can conveniently push the rotating shaft 1 to move in the axial direction. Typically, the drive member may be a hydraulic cylinder or the like. The output end of the driving member is typically adapted to abut an end surface of the shaft 1 at which the bearing assembly 6 is not positioned (i.e., a left end surface, i.e., a proximal end surface, as shown), such that the shaft 1 is axially movable from the left end surface to a right end surface, i.e., a distal end surface, as shown. Of course, the output end of the driving member may also abut against the distal end surface of the rotating shaft 1, and at this time, the rotating shaft 1 may move in the axial direction from the illustrated right end surface to the illustrated left end surface, and at this time, the distal end inner seal ring 8 will abut against the inner wall of the proximal end cap 5. Fig. 7 is a schematic structural view of a motor bearing in a dismounting process according to another embodiment of the present invention, as shown in fig. 7.
Further, when the rotating shaft 1 is pushed along, the rotating shaft 1 can be pushed by the output end of the driving part along the axial direction to move towards the end where the positioning bearing 7 is located. Generally, the non-positioning bearing assembly 6 and the positioning bearing 7 are respectively disposed at two ends of the rotating shaft 1, and the non-positioning bearing assembly 6 and the positioning bearing 7 are disposed at the left end (proximal end) of the rotating shaft 1 and the right end (distal end) of the rotating shaft 1 in the illustrated embodiment. Specifically, when the driving part outputs power, the rotating shaft 1 can be pushed axially at a preset feeding speed to move at a constant speed until a preset distance is reached.
In order to facilitate the abutment between the distal end inner seal ring 8 and the inner wall of the distal end cap 10, in this embodiment, when the driving shaft 1 axially moves to a predetermined distance, the inclined edge of the outer edge of the distal end inner seal ring 8 can abut against the end of the extension plate on the inner wall of the distal end cap 10. Specifically, in order to ensure that the outer edge bevel edge of the distal end inner seal ring 8 can form stable abutment with the end of the extension plate of the distal end cap 10 in the circumferential direction, the outer edge bevel edge of the distal end inner seal ring 8 and the end of the extension plate of the distal end cap 10 can be machined before the disassembly and assembly operation, so that the surfaces of the outer edge bevel edge and the end of the extension plate of the distal end cap 10 can be tightly attached to each other. Fig. 8 is a schematic view showing three abutting structures of the distal end inner seal ring 8 and the distal end cap 10 according to an embodiment of the present invention, as shown in fig. 8. The bevel edge of the outer edge of the distal end inner seal ring 8 may be a bevel or a circular arc, and the end of the extension plate of the distal end cap 10 may also be a bevel or a circular arc.
In addition, in order to ensure that the distal end inner seal ring 8 can be smoothly driven to synchronously move when the rotating shaft 1 axially moves, the axial installation position of the distal end cover 10 on the rotor can be adjusted in advance before the disassembly and assembly operation is carried out, so that the axial gap between the outer edge bevel edge of the distal end inner seal ring 8 and the tail end of the extension plate of the distal end cover 10 is smaller than the axial gap between the outer surface of the distal end inner seal ring 8 and the inner wall of the positioning bearing 7. As illustrated, the a line segment is smaller than the B line segment. So set up, distal end inner seal ring 8 with the in-process of pivot 1 simultaneous movement, can be in the distal end inner seal ring 8 the surface compressed and with the location bearing housing 9 before the butt for distal end inner seal ring 8 forms the butt with the extension board end of distal end cover 10.
In step S2, considering that a plurality of mounting holes are generally reserved on the surface of the proximal end cover 5, and the movable bracket 11 is mounted on the inner wall of the proximal end cover 5, in order to facilitate axial pushing of the movable bracket 11, in this embodiment, each long bolt 12 is inserted into each mounting hole on the proximal end cover 5, so that each long bolt 12 forms a threaded connection with the corresponding mounting hole, and then each long bolt 12 is directionally screwed to deepen the degree of threaded fit between the long bolt 12 and the mounting hole, so as to drive each long bolt 12 to go deep inwards in the axial direction of the mounting hole, so as to make the end of each long bolt 12 abut against the movable bracket 11, and then when the end of the movable bracket 11 goes deep, the movable bracket 11 is pushed to move inwards in the axial direction, so as to ensure that the end of the movable bracket 11 abuts against the proximal end inner seal ring 4 stably. Generally, since the mounting holes are uniformly distributed on the proximal end cover 5 along the circumferential direction and the long bolts 12 are mounted in each mounting hole, the respective long bolts 12 are also distributed along the circumferential direction, so that the degree of freedom of the rotating shaft 1 in all directions is limited.
Further, in order to ensure that the distal end of the movable holder 11 can be stably abutted against the surface of the proximal end inner seal ring 4, the surface shape of the distal end of the movable holder 11 may be matched in advance according to the surface shape of the proximal end inner seal ring 4. Specifically, the abutting structure between the movable support 11 and the proximal end inner seal ring 4 may be the same as the abutting structure between the distal end inner seal ring 8 and the distal end cap 10. The end of the movable support 11 may be a plane, a conical surface or an arc surface, and the bevel edge of the outer edge of the proximal inner seal ring 4 may also be a plane, a conical surface or an arc surface.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The disassembly and assembly method for preventing the over-positioning motor bearing from being disassembled is characterized by comprising the following steps of:
the rotating shaft is pushed along the axial direction to move for a preset distance so as to drive a far-end inner seal ring fixed on the far-end surface of the rotating shaft to be mutually abutted with the inner wall of a far-end cover in the axial direction, and meanwhile, a preset axial gap of a positioning installation allowance is generated between a positioning bearing seat in a positioning bearing assembly and the far-end cover;
moving a movable support which is detachably connected with the inner wall of the near-end cover along the axial direction, and enabling the tail end of the movable support to be abutted against a near-end inner sealing ring fixed on the near-end surface of the rotating shaft so as to limit the axial motion freedom degree of the rotating shaft;
removing the positioning bearing assembly from the distal end of the shaft while removing the non-positioning bearing assembly from the proximal end of the shaft;
moving the movable support to a reset position along the axial direction in a reverse direction, and installing a positioning bearing seat in the positioning bearing assembly and the far-end cover in place until an axial gap between the positioning bearing seat and the far-end cover disappears, so that the rotating shaft is reset along the axial direction in the reverse direction;
along the movable support that axial displacement and near-end cover's inner wall can dismantle and be connected specifically includes:
and inserting and installing a plurality of long bolts in a plurality of installation holes reserved on the near-end cover, and deepening the matching depth of the long bolts by directionally screwing the long bolts so as to enable the tail ends of the long bolts to be abutted against the movable support and push the movable support to move along the axial direction.
2. The method for preventing disassembly and assembly of an over-positioning motor bearing as claimed in claim 1, further comprising, before pushing the shaft in an axial direction to move the shaft a predetermined distance:
and the output end of the driving part is abutted against the end face of one end of the rotating shaft.
3. The disassembly and assembly method of claim 2, wherein the rotating shaft is pushed in an axial direction to move a predetermined distance, and comprises:
and the rotating shaft is pushed by the output end of the driving component along the axial direction to move towards the end of the positioning bearing assembly by a preset distance.
4. The disassembly and assembly method of claim 3, wherein the axial pushing of the shaft to move the shaft a predetermined distance comprises:
and the output end of the driving part pushes the rotating shaft to move at a constant speed along the axial direction according to a preset feeding speed until a preset distance is reached.
5. The method for preventing disassembly and assembly of the over-positioning motor bearing as claimed in claim 1, wherein driving the inner seal ring and the inner wall of the distal end cap to abut against each other in the axial direction specifically comprises:
and driving the bevel edge of the outer edge of the inner seal ring to abut against the tail end of the extension plate on the inner wall of the distal end cover.
6. The method of claim 5, further comprising, prior to driving the inner seal ring and the inner wall of the distal end cap axially against each other:
and machining the outer edge bevel edge of the inner seal ring and the end of the extension plate of the far end cover so that the outer edge bevel edge surface of the inner seal ring and the end surface of the extension plate of the far end cover can be attached to each other.
7. The method of claim 6, further comprising, prior to driving the inner seal ring and the inner wall of the distal end cap axially against each other:
and adjusting the axial installation position of the far end cover on the rotor so that the axial clearance between the outer edge bevel edge of the inner seal ring and the tail end of the extension plate of the far end cover is smaller than the axial clearance between the outer surface of the inner seal ring and the inner wall of the positioning bearing seat.
8. The method of claim 1 wherein the distal end surface of the movable bracket is shaped to match the surface of the proximal end inner seal ring.
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| CN202010574480.8A CN111669019B (en) | 2020-06-22 | 2020-06-22 | Disassembly and assembly method for preventing over-positioning motor bearing from being disassembled |
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| CN202010574480.8A CN111669019B (en) | 2020-06-22 | 2020-06-22 | Disassembly and assembly method for preventing over-positioning motor bearing from being disassembled |
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| CN111669019B true CN111669019B (en) | 2021-09-28 |
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| CN110695920A (en) * | 2019-11-14 | 2020-01-17 | 中车株洲电机有限公司 | Dismounting device of traction motor bearing |
| CN110784055A (en) * | 2019-11-14 | 2020-02-11 | 中车株洲电机有限公司 | Traction motor and rotor bearing disassembly and assembly structure without disassembly thereof |
| CN110829746A (en) * | 2019-11-14 | 2020-02-21 | 中车株洲电机有限公司 | Dismounting device for traction motor bearing and method applied to dismounting device |
| CN110829745A (en) * | 2019-11-14 | 2020-02-21 | 中车株洲电机有限公司 | Disassembly-free motor bearing disassembling and assembling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695920A (en) * | 2019-11-14 | 2020-01-17 | 中车株洲电机有限公司 | Dismounting device of traction motor bearing |
| CN110784055A (en) * | 2019-11-14 | 2020-02-11 | 中车株洲电机有限公司 | Traction motor and rotor bearing disassembly and assembly structure without disassembly thereof |
| CN110829746A (en) * | 2019-11-14 | 2020-02-21 | 中车株洲电机有限公司 | Dismounting device for traction motor bearing and method applied to dismounting device |
| CN110829745A (en) * | 2019-11-14 | 2020-02-21 | 中车株洲电机有限公司 | Disassembly-free motor bearing disassembling and assembling method |
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