CN113726086B - Motor structure and bearing dismounting method thereof - Google Patents
Motor structure and bearing dismounting method thereof Download PDFInfo
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- CN113726086B CN113726086B CN202110994561.8A CN202110994561A CN113726086B CN 113726086 B CN113726086 B CN 113726086B CN 202110994561 A CN202110994561 A CN 202110994561A CN 113726086 B CN113726086 B CN 113726086B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a motor structure, which utilizes universal parts on a motor to support and fix a rotor, wherein a bearing seat matched with a bearing outer ring is arranged on the bearing structure configuration, a support ring is additionally arranged at the same time, the rotor is driven to synchronously move in the process of pulling out a bearing sleeve to drive the bearing outer ring to disassemble a positioning end bearing, the rotor is supported and fixed under the supporting action of a first inclined plane and a second inclined plane as well as a third inclined plane and a fourth inclined plane, and the bearing outer ring is driven to disassemble a bearing at the remaining end by pulling out a non-positioning end bearing sleeve; compared with the prior art, the device has the characteristics of high overhauling operation efficiency, simple structure of the supporting part, wide universality and low labor intensity. The invention also provides a motor bearing dismounting method based on the structure, only the ball bearing at the positioning end needs to be dismounted first, and then the column bearing at the non-positioning end needs to be dismounted, the rotor can be automatically supported and fixed without additional actions in the ball bearing dismounting process, and the operation is simple.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a motor structure and a bearing dismounting method thereof.
Background
With the high-speed development of rail transit, the operation and maintenance requirements and the technical level of rail vehicles are increasing day by day. The working state and the maintenance requirement of each part on the vehicle are different, and the bearing on the traction motor is a core stressed part, so that the detection or the replacement is required within the specified time or kilometers in order to ensure the running safety of the vehicle and ensure the abnormal key of the overhauling and maintenance work of the bearing.
The conventional traction motor has a complicated structural arrangement, so that the bearing is disassembled, the motor is disassembled firstly, the stator and the rotor are separated, and then the bearing is pulled out from the bearing chamber to complete detection or replacement. The whole disassembly period is long, the process is complicated, a specific field and a special tool are needed, and the overhaul cost and the overhaul resource consumption are high.
Therefore, how to provide a universal motor structure that is easy to maintain without affecting the basic functions and performances of the motor is an important technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a simple, universal and reliable motor structure, which utilizes universal parts on the motor to solve the above-mentioned defects without affecting the original functions and functions of the parts, and has the characteristics of high maintenance efficiency, simple operation and low maintenance labor intensity.
In order to achieve the purpose, the invention provides the following technical scheme:
an electric machine structure comprising: a rotating shaft, a transmission end (shaft extension end) component and a non-transmission end component;
the drive end assembly includes: the transmission end cover, the cylindrical bearing, the support ring and the transmission end inner oil seal; the support ring is sleeved on the rotating shaft; the outer peripheral surface of the inner end of the support ring is provided with a first inclined plane with an angle A and a high outside and a low inside, the inner wall of the oil storage chamber of the transmission end cover is provided with a second inclined plane parallel to the first inclined plane, and the distance between the first inclined plane and the second inclined plane is delta 1 in an assembly state; the first outer end face of the support ring is abutted against the inner end of the cylindrical bearing; the first inner end surface of the support ring is connected with the second outer end surface of the transmission end inner oil seal;
the non-drive end assembly includes: the non-transmission end inner oil seal and the non-transmission end cover; the non-transmission end inner oil seal is sleeved on the rotating shaft; the outer wall of the non-transmission end inner oil seal is provided with a third inclined plane which has the same inclination direction as the first inclined plane and has an angle B, the inner wall of the tail labyrinth of the non-transmission end cover is provided with a fourth inclined plane parallel to the third inclined plane, and the distance between the third inclined plane and the fourth inclined plane is delta 2 in an assembly state; a third inner end surface of the non-transmission end inner oil seal abuts against a second step of the rotating shaft;
the angle A is not larger than the angle B, the opening of the angle B points to the transmission end, the angle delta 1 is delta 2, the angle delta 1 is not smaller than the radial labyrinth clearance between the transmission end cover and the transmission end oil seal, and the angle delta 2 is not smaller than the radial labyrinth clearance between the non-transmission end inner oil seal and the non-transmission end cover.
Preferably, the axial clearance L0 of the labyrinth ring between the internal oil seal of the non-transmission end and the end cover of the non-transmission end is more than delta 2/sinB.
Preferably, the second inner end surface of the transmission end inner oil seal abuts against the first step of the rotating shaft.
Preferably, the outer wall of the support ring is provided with a detaching structure.
Preferably, the detaching structure includes: and the groove is arranged on the outer wall of the support ring and is positioned between the first inclined surface and the first outer end surface.
Preferably, the drive end assembly further comprises: the cylindrical bearing accessory is abutted against the outer end of the cylindrical bearing;
the cylindrical bearing attachment includes: the transmission end bearing comprises a transmission end bearing outer cover, a transmission end bearing seat and a transmission end outer oil seal;
the outer cover of the transmission end bearing is arranged at the outer end of the transmission end bearing seat.
Preferably, the non-drive end assembly further comprises: ball bearings and ball bearing accessories; the inner end of the ball bearing is abutted against the third outer end face of the non-transmission end inner oil seal;
the ball bearing accessory includes: the bearing comprises a bearing sleeve, a non-transmission end bearing cover, a non-transmission end outer oil seal and a non-transmission end bearing outer cover;
the bearing sleeve is sleeved between the ball bearing and the non-transmission end cover; the non-transmission end bearing cover and the non-transmission end outer oil seal are abutted against the outer end of the ball bearing; the non-transmission end bearing outer cover is arranged at the outer ends of the non-transmission end bearing cover and the non-transmission end outer oil seal; the outer end face of the bearing sleeve is provided with a plurality of threaded holes for pulling out.
A motor bearing dismounting method is applied to the motor structure and comprises the following steps:
firstly, pulling out the ball bearing to enable the rotating shaft to synchronously move towards the non-transmission end until the first inclined surface of the support ring contacts the second inclined surface of the end cover of the transmission end;
and then the cylindrical bearing is disassembled.
Preferably, in the process of detaching the ball bearing, the method further includes:
and when the outer ring of the ball bearing is pulled out, the inner ring of the ball bearing drives the rotating shaft to move to the non-transmission end to the rotor to finish centering and fixing.
Preferably, before moving the rotating shaft to the non-transmission end, the method further comprises:
and removing the outer cover of the bearing at the transmission end, the outer cover of the bearing at the non-transmission end, the outer oil seal at the non-transmission end and the bearing cover at the non-transmission end.
According to the technical scheme, the motor structure provided by the invention has the following advantages:
1) the invention utilizes almost all the universal structures on the motor to fix the radial direction and the axial direction of the rotor, and has compact, simple and reliable structure and good manufacturability;
2) the invention simultaneously completes the ball bearing drawing, the positioning and the rotor fixing, and has simple and reliable operation;
3) the invention is not limited to the type of motor construction and is applicable to all motors (fully closed and open, permanent magnet synchronous or squirrel cage asynchronous).
The invention also provides a motor bearing dismounting method based on the structure, the rotor can be synchronously positioned and supported when the positioning end bearing is pulled out, and the operation is simple.
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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an assembled state of a motor structure provided in an embodiment of the present invention;
fig. 2 is an exploded schematic view of a motor structure provided in an embodiment of the present invention;
FIG. 3 is an enlarged view of the drive end assembly of FIG. 1;
FIG. 4 is a schematic diagram of an inclined plane matching structure of a support ring and a transmission end cover according to an embodiment of the present invention;
FIG. 5 is an enlarged view of the non-drive end assembly of FIG. 1;
FIG. 6 is a schematic diagram of a bevel-fitting structure of an internal oil seal of a non-driving end and an end cover of the non-driving end according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a support ring according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a motor according to an embodiment of the present invention, in which a rotor is supported after moving left during a dismounting process;
FIG. 9 is a schematic diagram of a disassembled bevel contact structure between an oil seal at a non-transmission end and an end cover at the non-transmission end;
FIG. 10 is a schematic view of a disassembled supporting ring and a bevel contact structure of a driving end cover according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a motor provided in an embodiment of the present invention, in which a bearing is fixedly pulled out of a rotor during a dismounting process.
Wherein, 1-stator pressing ring; 2-a coil; 3-end cover of transmission end, 31-second inclined plane; 4-an end ring; 5-transmission end bearing outer cover; 6-transmission end bearing seat; 7-cylindrical bearings; 8-support ring, 81-first inner end face, 82-first bevel, 83-groove, 84-first outer end face; 9-transmission end inner oil seal, 91-second inner end surface, 92-second outer end surface; 10-external oil seal of transmission end; 11-rotation axis, 111-first step, 112-second step; 12-rotor clamping ring; 13-a rotor; 14-a stator; 15-grease; 16-non-transmission end inner oil seal, 161-third outer end surface, 162-labyrinth outer wall, 163-third inclined surface and 164-third inner end surface; 17-non-drive end cap, 171-fourth bevel; 18-a non-drive end bearing sleeve; 19-ball bearings; 20-a non-drive end bearing cap; 21-non-transmission end external oil seal; 22-non-drive end bearing cover.
Detailed Description
The invention provides a structure and a method for pulling out a bearing under the condition that a motor does not separate a stator and a rotor, so that the motor does not return to a factory, and the bearing can be disassembled and replaced by only using a simple common bearing disassembling tool.
The invention not only reduces the transportation cost, the overhaul period and the resource allocation requirement of overhaul or troubleshooting, but also greatly reduces the labor intensity of operators, improves the overhaul or troubleshooting efficiency and improves the technical level of operation and maintenance.
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.
The motor provided by the embodiment of the invention, as shown in fig. 1 to 8, comprises: the device comprises a rotating shaft 11, a transmission end assembly and a non-transmission end assembly;
wherein, the drive end subassembly includes: the transmission end cover 3, the cylindrical bearing 7, the support ring 8 and the transmission end inner oil seal 9; the support ring 8 is sleeved on the rotating shaft 11; the outer peripheral surface of the inner end of the support ring 8 is provided with a first inclined surface 82 with an angle A and a high outside and a low inside, the inner wall of the oil storage chamber of the transmission end cover 3 is provided with a second inclined surface 31 parallel to the first inclined surface 82, and the distance between the first inclined surface 82 and the second inclined surface 31 is delta 1 in an assembly state; the first outer end face 84 of the support ring 8 abuts against the inner end of the cylindrical bearing 7; the first inner end surface 81 of the support ring 8 is connected with the second outer end surface 92 of the transmission end inner oil seal 9; it can be understood that the direction of each component in the scheme, which is close to the rotor 13, is an inner end, and the direction, which is far away from the rotor 13, is an outer end rotating shaft;
the non-drive end assembly includes: a non-drive end inner oil seal 16 and a non-drive end cap 17; the non-transmission end inner oil seal 16 is sleeved on the rotating shaft 11; the outer wall of the internal oil seal 16 at the non-transmission end is provided with a third inclined surface 163 which has the same inclination direction as the first inclined surface 82 and has an angle B, the inner wall of the labyrinth at the tail part of the end cover 17 at the non-transmission end is provided with a fourth inclined surface 171 which is parallel to the third inclined surface 163, and the distance between the third inclined surface 163 and the fourth inclined surface 171 is delta 2 in an assembly state; the third inner end surface 164 of the internal oil seal 16 of the non-transmission end abuts against the second step 112 of the rotating shaft 11, so that when the rotating shaft 11 moves towards the non-transmission end (left side in the figure), the internal oil seal 16 of the non-transmission end is pushed to be close to the end cover 17 of the non-transmission end, and the distance between the third inclined surface 163 and the fourth inclined surface 171 is reduced until the third inclined surface and the fourth inclined surface are contacted;
the angle A is not larger than the angle B, the openings of the angles all point to the transmission end, the distance delta 1 is delta 2, the delta 1 is not smaller than the labyrinth radial clearance between the transmission end cover 3 and the transmission end oil seal 9, and the delta 2 is not smaller than the labyrinth radial clearance between the non-transmission end inner oil seal 16 and the non-transmission end cover 17.
Preferably, angles a and B are of a magnitude close to the self-locking angle at which the two metal surfaces mate.
It should be noted that, when the motor is in an assembled state, the structure of the drive end assembly is as shown in fig. 3 and 4, and the distance between the first inclined surface 82 of the support ring 8 and the second inclined surface 31 of the drive end cover 3 is Δ 1, which does not affect the effect of the labyrinth gap seal; the non-drive end assembly is constructed as shown in fig. 5 and 6, and the distance between the third inclined surface 163 of the non-drive end internal oil seal 16 and the fourth inclined surface 171 of the non-drive end cover 17 is delta 2, so that the labyrinth clearance sealing effect is not influenced.
When the bearing needs to be disassembled, firstly, the ball bearing is pulled outwards through the bearing sleeve 18, and at this time, the inner ring of the ball bearing drives the rotating shaft 11 to move towards the non-transmission end (left side in the figure) until the first inclined surface 82 of the support ring 8 contacts the second inclined surface 31 of the transmission end cover 3, and at this time, the rotor 13 completes centering and fixing, and the structure of the disassembled state can be shown in fig. 10; meanwhile, because the inclination directions of the angle A and the angle B are the same, and A is less than or equal to B, the third inclined surface 163 of the internal oil seal 16 of the non-transmission end and the fourth inclined surface 171 of the end cover 17 of the non-transmission end can be ensured to be contacted with each other, and the structure of the disassembly state can be referred to fig. 9.
According to the technical scheme, the motor structure provided by the invention can realize supporting and self-locking at two ends respectively by moving the rotating shaft 11 and the rotor 13 in a single direction at one time, the operation is simultaneously completed in the process of pulling out the ball bearing, and the process is simple and reliable; the bevel fit can provide both axial and radial positioning; the scheme does not need to disassemble the end cover; before the bearing is disassembled, the rotor 13 can be supported and fixed, the air gap is ensured to be uniform, and the permanent magnet motor can be used for preventing the stator and the rotor from being sucked together.
Preferably, the axial clearance L0 of the labyrinth ring between the oil seal 16 at the non-transmission end and the end cover 17 at the non-transmission end of 171 is more than delta 2/sinB, and the structure can be seen in figure 6. Therefore, when the rotating shaft 11 moves to the non-transmission end (left side in the drawing), the contact between the third inclined surface 163 and the fourth inclined surface 171 can be better ensured. Accordingly, when operating, the horizontal movement distance S of the rotor 13 becomes Δ 2/sinB < L0 (labyrinth axial gap).
Further, the second inner end surface 91 of the drive end inner oil seal 9 abuts against the first step 111 of the rotating shaft 11. The design is such that when the rotating shaft 11 moves towards the transmission end (right side in the figure), the transmission end inner oil seal 9 is pushed to abut against the support ring 8 and be away from the transmission end cover 3, so that a distance between the first inclined surface 82 and the second inclined surface 31 is generated until delta 1, and at this time, the rotating shaft 11 returns to the center and returns to the aforementioned assembling state.
In this solution, the outer wall of the support ring 8 is provided with a dismounting structure.
Preferably, the detaching structure includes: a groove 83 is provided on the outer wall of the support ring 8 between the first inclined surface 82 and the outer end surface 84. In this way, the support ring 8 can be removed by a conventional tool, which is simple to replace and is suitable for a wide variety of removal tools.
Specifically, the drive end assembly further comprises: a cylindrical bearing accessory abutting against the outer end of the cylindrical bearing 7;
the cylindrical bearing attachment includes: a transmission end bearing outer cover 5, a transmission end bearing seat 6 and a transmission end outer oil seal 10;
the transmission end bearing outer cover 5 is installed at the outer end of the transmission end bearing seat 6. The structure of the bearing seat can be seen in fig. 3 and 4, and the transmission end bearing seat 6 is arranged between the outer ring of the cylindrical bearing 7 and the end cover transmission end cover 3. With the arrangement, before the cylindrical bearing 7 is maintained, the outer bearing cover 5, the fastening bolt and the outer oil seal 10 at the transmission end are removed; the outer ring of the cylindrical bearing 7 and the end cover transmission end cover 3 can be actively separated through the transmission end bearing seat 6, the structure is simple, and the operation is convenient.
The non-drive end assembly further comprises: ball bearings 19 and ball bearing accessories; the inner end of the ball bearing 19 abuts against the third outer end surface 161 of the non-transmission end inner oil seal 16;
the ball bearing accessory includes: a bearing sleeve 18, a non-transmission end bearing cover 20, a non-transmission end outer oil seal 21 and a non-transmission end outer bearing cover 22;
the bearing sleeve 18 is sleeved between the ball bearing 19 and the non-transmission end cover 17; the non-transmission end bearing cover 20 and the non-transmission end outer oil seal 21 abut against the outer end of the ball bearing 19; the non-transmission end bearing outer cover 22 is arranged at the outer ends of the non-transmission end bearing cover 20 and the non-transmission end outer oil seal 21;
the outer end surface of the bearing sleeve 18 is provided with a plurality of threaded holes for extraction. The structure of the bearing can be seen in fig. 5 and 6, and the arrangement is that before the ball bearing 19 is maintained, the external non-transmission end bearing cover 22, the fastening bolt, the external non-transmission end oil seal 21 and the external non-transmission end bearing cover 20 are removed; the outer ring of the ball bearing 19 and the non-transmission end cover 17 and the inner ring of the ball bearing 19 can be actively separated from the rotating shaft 11 through the bearing sleeve 18, the structure is simple, and the operation is convenient.
The present solution is further described below with reference to specific embodiments:
the technical scheme of the invention aims at all types of traction motors, and supports and fixes the rotor by using universal parts on the motor without influencing the original functions and functions of the parts. And a bearing seat matched with the bearing outer ring is arranged on the bearing structure, and a support ring is additionally arranged. According to the specific structure and the disassembly target of the motor, the following bearing disassembly method and technical scheme are provided.
The main structure is as follows: the bearing comprises an oil seal inclined plane (supporting and positioning end), a supporting ring (supporting and floating end), a bearing seat/sleeve (realizing the active separation of a column bearing outer ring and an end cover, and the active separation of a ball bearing outer ring and the end cover, and a ball bearing inner ring and a rotating shaft). This scheme is applicable to duplex bearing (both ends bearing) motor, pulls out location end ball bearing outer lane earlier through bearing housing 18, and the bearing inner race drives the rotor and moves to location end bearing direction (one-way, once), and when the distance that the ball bearing extracted was greater than S (S ═ Δ 2/sinB), the rotor was held and is fixed by support ring and oil blanket inclined plane, continues to pull out the ball bearing and will make the bearing inner race break away from the final ball bearing of pivot and extract completely. And then the outer ring of the column bearing is disassembled by pulling out the bearing seat 6, and then the inner ring of the column bearing is pulled out in an induction heating mode to complete the disassembly of the bearings at the two ends, wherein the specific structure is shown in figures 1 and 2.
A support ring 8 which can be separated independently is added at the non-positioning end (column bearing side), and a raised inclined plane with an angle A is arranged; the inner wall of the oil storage chamber of the transmission end cover 3 is provided with an inclined plane with a corresponding size, and the distance between the two inclined planes is delta 1. An inclined plane with the same inclination direction as A and the angle of B is arranged on the outer wall of the inner oil seal 16 at the positioning end (the ball bearing side); the inner wall of the labyrinth at the tail part of the non-transmission end cover 17 is provided with an inclined plane with corresponding size, and the distance between the two inclined planes is delta 2.
The inclination directions of the angle A and the angle B are consistent, and A is less than or equal to B; ensuring that the positioning ends can be contacted certainly. The Δ 1 and Δ 2 clearances are not less than the normal labyrinth clearance (typically 0.5). The support ring 8 is provided with a groove for dismounting and pulling out. The horizontal moving distance S of the rotor is delta 2/sinB < L0 (labyrinth ring axial clearance).
The disassembly and assembly process is as follows:
a) removing the transmission end bearing outer cover 5, the non-transmission end bearing outer cover 22 and the fastening bolt, and removing the transmission end outer oil seal, the non-transmission end outer oil seal 21 and the non-transmission end bearing cover 20 at two ends;
b) the ball pulling bearing 19 drives the rotor 13 and the rotating shaft 11 to move towards a positioning end (left side in the figure) until the support ring 8 contacts the inclined surface of the end cover 3 of the transmission end, and the rotor is fixed at the moment;
c) continuously pulling out a non-transmission end bearing sleeve 18 of the positioning end to bring out a ball bearing 19, then pulling out a transmission end bearing seat 6 of the transmission end to bring out a cylindrical bearing 7, and pulling out a floating end bearing inner ring by induction heating;
d) cleaning bearing chambers at two ends, adding new grease, and preparing to press new bearings;
e) the inner ring of the new cylindrical bearing 7 at the floating end is installed in place through a hot sleeve, and the outer ring is pressed into the bearing seat 6 at the transmission end and then installed in place;
f) pressing the new ball bearing 19 of the positioning end into the bearing sleeve 18 of the non-transmission end;
g) pressing the inner ring of the new bearing (with a bearing sleeve) at the positioning end to a theoretical position;
h) and pressing the outer ring of the new bearing at the positioning end to a theoretical position for fastening, pushing the rotor to the floating end and returning to the position for centering at the moment, and finishing the replacement of the bearing.
In summary, the key points and points to be protected of the present invention are:
1) the support of the rotor is completed simultaneously with the movement of the ball bearing at the positioning end without separate operation. Namely, the extraction of the ball bearing and the support and positioning of the rotor are combined and completed in the same action, and the operation is simple.
2) The supporting part of the rotor has simple structure and good universality, and changes little compared with the structure of the traditional motor.
The scheme realizes the fixation of the rotor and the separation of the bearing by using the least structural members and the most common structure, and is easier to modify and upgrade the technology of fixing and dismounting the bearing by using the stator and the rotor of the existing motor without separation, wide in application range and low in modification cost.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
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 (10)
1. An electric machine construction, comprising: the device comprises a rotating shaft (11), a transmission end assembly and a non-transmission end assembly;
the drive end assembly includes: the transmission end cover (3), the cylindrical bearing (7), the support ring (8) and the transmission end inner oil seal (9); the support ring (8) is sleeved on the rotating shaft (11); a first inclined plane (82) with a high outer part and a low inner part and an angle of A is arranged on the outer peripheral surface of the inner end of the support ring (8), a second inclined plane (31) parallel to the first inclined plane (82) is arranged on the inner wall of an oil storage chamber of the transmission end cover (3), and the distance between the first inclined plane (82) and the second inclined plane (31) is delta 1 in an assembly state; the first outer end face (84) of the support ring (8) abuts against the inner end of the cylindrical bearing (7); a first inner end surface (81) of the support ring (8) is abutted against a second outer end surface (92) of the transmission end inner oil seal (9);
the non-drive end assembly includes: a non-transmission end inner oil seal (16) and a non-transmission end cover (17); the non-transmission end inner oil seal (16) is sleeved on the rotating shaft (11); the outer wall of the non-transmission end inner oil seal (16) is provided with a third inclined surface (163) which has the same inclination direction as the first inclined surface (82) and has an angle B, the inner wall of a tail labyrinth of the non-transmission end cover (17) is provided with a fourth inclined surface (171) which is parallel to the third inclined surface (163), and the distance between the third inclined surface (163) and the fourth inclined surface (171) is delta 2 in an assembly state; a third inner end surface (164) of the non-transmission end inner oil seal (16) is abutted against a second step (112) of the rotating shaft (11);
the angle A is not larger than the angle B, the openings of the angles point to the transmission end, the distance delta 1= delta 2, the delta 1 is not smaller than the radial labyrinth clearance between the transmission end cover (3) and the transmission end inner oil seal (9), and the delta 2 is not smaller than the radial labyrinth clearance between the non-transmission end inner oil seal (16) and the non-transmission end cover (17).
2. An electric machine arrangement, according to claim 1, characterized in that the labyrinth ring axial clearance L0 > Δ 2/sinB between the non-drive end inner oil seal (16) and the non-drive end cap (17).
3. The electric machine structure according to claim 1, characterized in that the second inner end surface (91) of the transmission end inner oil seal (9) abuts against the first step (111) of the rotating shaft (11).
4. An electric machine arrangement according to claim 1, characterized in that the outer wall of the support ring (8) is provided with a dismounting structure.
5. The electric machine structure of claim 4, wherein the disassembly structure comprises: a groove (83) provided on the outer wall of the support ring (8) between the first bevel (82) and the first outer end surface (84).
6. The electric machine structure of claim 1, wherein the drive end assembly further comprises: a cylindrical bearing attachment abutting against the outer end of the cylindrical bearing (7);
the cylindrical bearing attachment includes: a transmission end bearing outer cover (5), a transmission end bearing seat (6) and a transmission end outer oil seal (10);
and the outer driving end bearing cover (5) is arranged at the outer end of the driving end bearing seat (6).
7. The electric machine structure of claim 1, wherein the non-drive end assembly further comprises: ball bearings (19) and ball bearing accessories; the inner end of the ball bearing (19) abuts against a third outer end surface (161) of the non-transmission end inner oil seal (16);
the ball bearing accessory includes: the bearing comprises a bearing sleeve (18), a non-transmission end bearing cover (20), a non-transmission end outer oil seal (21) and a non-transmission end bearing outer cover (22);
the bearing sleeve (18) is sleeved between the ball bearing (19) and the non-transmission end cover (17); the non-transmission end bearing cover (20) and the non-transmission end outer oil seal (21) are abutted against the outer end of the ball bearing (19); the non-transmission end bearing outer cover (22) is arranged at the outer ends of the non-transmission end bearing cover (20) and the non-transmission end outer oil seal (21); the outer end face of the bearing sleeve (18) is provided with a plurality of threaded holes for pulling out.
8. A motor bearing dismounting method applied to the motor structure according to any one of claims 1 to 7, comprising:
firstly, disassembling the ball bearing (19), and synchronously moving the rotating shaft (11) to the non-transmission end until the first inclined surface (82) of the support ring (8) contacts the second inclined surface (31) of the transmission end cover (3);
then the cylindrical bearing (7) is disassembled.
9. The motor bearing removal method of claim 8, further comprising, during the removing of the ball bearing (19):
and when the outer ring of the ball bearing (19) is pulled out, the inner ring of the ball bearing (19) drives the rotating shaft (11) to move to the rotor (13) towards the non-transmission end to complete centering and fixing.
10. The motor bearing removal method of claim 8, further comprising, before the rotating shaft (11) is synchronously moved toward the non-driving end:
and removing the outer bearing cover (5) at the transmission end, the outer bearing cover (22) at the non-transmission end, the outer oil seal (10) at the transmission end, the outer oil seal (21) at the non-transmission end and the bearing cover (20) at the non-transmission end.
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| DE102022104929B3 (en) | 2022-03-02 | 2023-03-09 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Electric machine that can be assembled easily and safely, and method for assembling an electric machine of this type easily and safely |
| CN114649892B (en) * | 2022-05-23 | 2022-08-16 | 山西省机电设计研究院有限公司 | Motor with bearing disassembly assisting device |
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| US20150123517A1 (en) * | 2012-05-29 | 2015-05-07 | Mitsubishi Electric Corporation | Rotary electric machine and bearing changing method |
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| JP4939894B2 (en) * | 2006-10-13 | 2012-05-30 | 株式会社東芝 | Electric motor |
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| CN206349854U (en) * | 2016-12-29 | 2017-07-21 | 浙江聚利电动工具有限公司 | Band shift fork armature spindle |
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