CN114337132B - Bearing protection method for large-scale motor transportation - Google Patents
Bearing protection method for large-scale motor transportation Download PDFInfo
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- CN114337132B CN114337132B CN202210038488.1A CN202210038488A CN114337132B CN 114337132 B CN114337132 B CN 114337132B CN 202210038488 A CN202210038488 A CN 202210038488A CN 114337132 B CN114337132 B CN 114337132B
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000009434 installation Methods 0.000 claims description 13
- 239000000523 sample Substances 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007373 indentation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000032544 Cicatrix Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
Classifications
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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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a bearing protection method for large-scale motor transportation, which comprises the following steps: step one, fixing a bearing outer cover on a motor bearing seat so that the bearing outer cover compresses an outer ring of a bearing, and arranging radial threaded through holes in the circumferential direction of a boss of the bearing outer cover; step two, the outer oil seal is fixedly arranged on a rotating shaft, the outer oil seal compresses the inner ring of the bearing, and the boss is sleeved on the outer side of the outer oil seal; and thirdly, screwing the locking bolt into the radial threaded through hole, wherein the end surface of the locking bolt is abutted against the outer surface of the outer oil seal, so that the bearing and the rotating shaft are relatively fixed. Compared with the prior art, the bearing protection method for large-scale motor transportation has the advantages of simple structure and low cost, and can protect the bearing from damage in the transportation process, so that the bearing protection method is more reliable.
Description
Technical Field
The application relates to the technical field of motor bearings, in particular to a bearing protection method for large-scale motor transportation.
Background
Bearings are critical components for supporting the operation of the motor, and their condition directly determines the reliability of the motor operation. After the motor assembly is finished and the delivery running test is qualified, the motor is often sent to a customer general assembly base by a single motor to be assembled and debugged with the whole machine part, and the abnormal sound phenomenon of the bearing of part of the motor is often found in the running and debugging process. Through reason analysis, bearing transportation damage is often caused by improper transportation protection and fixation of the generator, and bearing damage is aggravated due to overlarge vibration caused by uneven pavement, rapid acceleration and deceleration and the like.
In the prior art, bearing play is generally eliminated through a shaft end protection tool, axial fixing is realized by utilizing axial pressing force, the protection method has remarkable effect on the arrangement of ball bearings at two ends of a motor, but in a large motor, the arrangement of the motor usually adopts the arrangement of a ball bearing at one end and a column bearing at the other end or the arrangement of a column bearing at one end and a ball bearing at the other end, and the play of the column bearing can not be eliminated because of large and long rotor, so that the rotor of the column bearing is in a moving state in the radial direction, if the road is rugged, the motor is jolt, if the vehicle speed is suddenly changed, the motor rotor is hard to impact a limit part of the column bearing due to inertia, and an inner sleeve, a ball bearing and a retainer of the column bearing are extremely easy to damage, so that scars are caused. After the bearing is damaged, mechanical vibration and mechanical noise are increased during operation, the quality of the motor is reduced if the motor is light, and the motor cannot normally operate or even cannot be used if the motor is heavy.
In the prior art, a bearing is usually fixed by adopting a belt or rope tensioning bearing for protecting a column bearing, and the belt and the rope are large in elasticity, and the applied tensioning force cannot be precisely quantized, so that the device is poor in use effect in a large motor and cannot inhibit radial movement of a rotor.
Therefore, a bearing protection method for large-scale motor transportation is needed, the structure is simple, the cost is low, the bearing can be protected from damage in the transportation process, and the bearing is more reliable.
Disclosure of Invention
In order to solve the technical problems, the application provides the bearing protection method for the transportation of the large motor, which has the advantages of simple structure and low cost, and can protect the bearing from damage in the transportation process, and is more reliable.
The technical scheme provided by the application is as follows:
The bearing protection method for large-scale motor transportation comprises the following steps:
step one, fixing a bearing outer cover on a motor bearing seat so that the bearing outer cover compresses an outer ring of a bearing, and arranging radial threaded through holes in the circumferential direction of a boss of the bearing outer cover;
Step two, the outer oil seal is fixedly arranged on a rotating shaft, the outer oil seal compresses the inner ring of the bearing, and the boss is sleeved on the outer side of the outer oil seal;
and thirdly, screwing the locking bolt into the radial threaded through hole, wherein the end surface of the locking bolt is abutted against the outer surface of the outer oil seal, so that the bearing and the rotating shaft are relatively fixed.
Preferably, the bearing arrangement of the motor comprises a ball bearing, further comprising, between step two and step three, the steps of:
and applying axial pre-tightening force to the end face of the rotating shaft through a pre-tightening device, so as to eliminate the installation clearance of the ball bearing.
Preferably, after the third step, the method further comprises the following steps:
and step four, removing the pre-compression device and transporting the motor.
Preferably, the pre-compacting device comprises:
The pressing plate is arranged on one side of the motor and is abutted with the rotating shaft;
The pressing plate penetrates through the pressing plate, the pressing screw rod is abutted to one side, away from the motor bearing seat, of the bearing outer cover, and the pressing screw rod is provided with a mounting nut located on the outer side of the pressing plate.
Preferably, the locking bolts are provided with a plurality of groups, and the locking bolts are arranged at intervals around the circumference of the outer oil seal.
Preferably, the radial threaded through hole is arranged on one side of the rotating shaft, and resultant force of each locking bolt to the outer oil seal is in the same direction.
Preferably, the locking bolts are uniformly arranged at intervals around the circumference of the outer oil seal, and each locking bolt passes through the radial threaded through hole to be abutted with the outer surface of the outer oil seal.
Preferably, after the second step, the method further comprises the following steps:
installing a dial indicator on the bearing outer cover, and enabling a probe of the dial indicator to be in contact with the rotating shaft to obtain an initial value of the dial indicator;
Slowly lifting one end of the rotating shaft through a lifting device until the value of the dial indicator is not changed any more, and obtaining a measured value of the dial indicator;
The difference between the initial value and the measured value is the radial installation clearance between the rotating shaft and the bearing.
Preferably, the third step specifically includes:
and screwing down each locking bolt until the display value of the dial indicator is positioned between the initial value and the measured value, and at the moment, the end surfaces of the locking bolts are all abutted with the outer surface of the outer oil seal.
Preferably, the surface of the outer oil seal, which contacts the locking bolt, is a plane.
The invention provides a bearing protection method for large-scale motor transportation, which comprises the following steps: fixing the bearing outer cover on the motor bearing seat, so that the bearing outer cover presses the outer ring of the bearing, and axially positioning the outer ring of the bearing; the outer oil seal is fixedly arranged on the rotating shaft, so that the outer oil seal compresses the inner ring of the bearing, and the inner ring of the bearing is axially positioned; the outer bearing cover is provided with a boss far away from the motor bearing seat, after the outer bearing cover and the outer oil seal are installed, the boss is sleeved on the outer side of the outer oil seal, radial threaded through holes are formed in the circumferential direction of the boss, a locking bolt is screwed into the radial threaded through holes, the end face of the locking bolt is abutted to the outer surface of the outer oil seal, the bearing is fixed with a rotating shaft, the abutting action of the locking bolt on the outer oil seal is utilized, radial installation clearance between the rotating shaft and the bearing is eliminated, and the rotating shaft is fixedly connected with the outer oil seal, so that damage to the bearing caused by movement of the radial direction of the rotating shaft in the transportation process is prevented; because the mutual friction force and the friction moment exist between the locking bolt and the outer oil seal to fix the rotating shaft, the rotating shaft is prevented from generating axial movement and circumferential rotation, and therefore the effective fixation of the rotating shaft in three directions is achieved.
And secondly, as the connection between the radial threaded through holes of the locking bolts is rigid connection, the connection between the radial threaded through holes is more reliable, and the bearing is ensured not to be damaged by pseudo-Buchner indentation under the continuous high-frequency vibration impact in the motor transportation process.
And moreover, as the parts of the motor are utilized, the outer oil seal and the bearing outer cover are locked only through the radial threaded through hole on the bearing outer cover by the locking bolt, and the structure is simple and the cost is low.
Therefore, compared with the prior art, the bearing protection method for large-scale motor transportation is simple in structure, low in cost, capable of preventing bearing damage and more reliable.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a bearing protection tool for transporting a large motor according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
Fig. 3 is a schematic diagram of another structure of a bearing protection tool for transporting a large motor according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of an embodiment of the fixing of an outer oil seal to a bearing outer cover according to an embodiment of the present invention;
FIG. 5 is a partial enlarged view at B in FIG. 4;
Fig. 6 is a schematic structural diagram of a lifting device according to an embodiment of the present invention.
Reference numerals: 1. a bearing outer cover; 2. a motor bearing seat; 3. a bearing; 4. an outer oil seal; 5. a rotating shaft; 6. a locking bolt; 7. a precompaction device; 71. a pressing plate; 72. tightly pushing the screw rod; 73. installing a nut; 81. a dial indicator; 82. a probe; 83. a lifting device; 84. an electronic scale.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of a plurality of "a number" is two or more, unless explicitly defined otherwise.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the application, which is defined by the claims, but rather by the claims, unless otherwise indicated, and that any structural modifications, proportional changes, or dimensional adjustments, which would otherwise be apparent to those skilled in the art, would be made without departing from the spirit and scope of the application.
The embodiment of the invention is written in a progressive manner.
As shown in fig. 1 to 2, an embodiment of the present invention provides a protection method for a bearing for transporting a large-scale motor, which includes the following steps: step one, fixing a bearing outer cover 1 on a motor bearing seat 2, so that the bearing outer cover 1 presses an outer ring of a bearing 3, and radial threaded through holes are formed in the circumferential direction of a boss of the bearing outer cover 1; step two, sleeving the outer oil seal 4 on the rotating shaft 5, so that the outer oil seal 4 compresses the inner ring of the bearing 3, and sleeving a boss on the outer side of the outer oil seal 4; and thirdly, screwing the locking bolt 6 into the radial threaded through hole, wherein the end surface of the locking bolt 6 is abutted with the outer surface of the outer oil seal 4, so that the bearing 3 and the rotating shaft 5 are relatively fixed.
The column bearing of the motor in the prior art is generally fixed by adopting a belt or rope to tighten the bearing in the transportation process, and the applied tightening force cannot be accurately quantized due to the fact that the elasticity of the belt and the rope is large, so that the device is poor in use effect in a large motor and cannot inhibit radial movement of a rotor.
The invention provides a bearing protection method for large-scale motor transportation, which comprises the following steps: fixing the bearing outer cover 1 on the motor bearing seat 2, so that the bearing outer cover 1 presses the outer ring of the bearing 3, and axially positioning the outer ring of the bearing 3; the outer oil seal 4 is fixedly arranged on the rotating shaft 5, so that the outer oil seal 4 presses the inner ring of the bearing 3, and the inner ring of the bearing 3 is axially positioned; the bearing outer cover 1 is provided with a boss on one side far away from the motor bearing seat 2, after the bearing outer cover 1 and the outer oil seal 4 are installed, the boss is sleeved on the outer side of the outer oil seal 4, radial threaded through holes are formed in the circumferential direction of the boss, a locking bolt 6 is screwed into the radial threaded through holes, the end face of the locking bolt 6 is abutted against the outer surface of the outer oil seal 4, the bearing 3 and the rotating shaft 5 are relatively fixed, the abutting action of the locking bolt 6 on the outer oil seal 4 is utilized, radial installation play between the rotating shaft 5 and the bearing 3 is eliminated, and damage to the bearing caused by movement of the rotating shaft 5 in the radial direction in the transportation process is prevented; because the mutual friction force and the friction moment exist between the locking bolt 6 and the outer oil seal 4 to fix the rotating shaft 5, the axial movement and the circumferential rotation movement between the rotating shaft 5 and the bearing 3 are prevented, and the effective fixation of the rotating shaft 5 in three directions is realized.
Secondly, because the connection between the radial threaded through holes of the locking bolts 6 is rigid connection, the connection between the radial threaded through holes is more reliable, and the bearing is ensured not to be damaged by pseudo-Buchner indentation under the continuous high-frequency vibration impact in the motor transportation process.
And moreover, the outer oil seal 4 is locked by utilizing the parts of the motor, and only the locking bolt 6 passes through the radial threaded through hole on the bearing outer cover 1, so that the structure is simple and the cost is low.
In summary, compared with the prior art, the bearing protection method for large-scale motor transportation provided by the embodiment of the invention has the advantages of simple structure, low cost, bearing damage prevention and reliability.
In the above method, if the bearing arrangement of the motor is specifically: the driving end and the non-driving end of the motor are both provided with cylindrical bearings, and as a more preferable implementation manner, the bearing protection method for large-scale motor transportation in the embodiment of the invention comprises the following steps: the motor is installed at the driving end of the motor according to the first step to the third step, and the motor is installed at the non-driving end of the motor according to the first step to the third step. The bearings 3 at the two ends can not be damaged under the continuous high-frequency vibration impact in the motor transportation process.
In the above method, if the bearing arrangement of the motor includes a ball bearing, as shown in fig. 3, the following steps are further included between the second step and the third step: the axial pretightening force is applied to the end face of the rotating shaft 5 through the pretightening device 7, the rotating shaft 5 is pressed through the axial pretightening force, the axial installation clearance between the ball bearing and the rotating shaft 5 is eliminated, under the action of the pretightening force, the locking bolt 6 is screwed into the radial threaded through hole, the end face of the locking bolt 6 is abutted with the outer surface of the outer oil seal 4, the radial installation clearance between the rotating shaft 5 and the bearing is eliminated, and due to the mutual friction force and friction torque between the locking bolt 6 and the outer oil seal 4, the axial direction movement and the circumferential direction rotation movement between the rotating shaft 5 and the bearing 3 are prevented, so that the effective fixation of the rotating shaft 5 in three directions is realized.
Further, in the above method, the bearing arrangement of the motor is specifically: one end of the motor is provided with a ball bearing, and the other end of the motor is provided with a column bearing; or, a ball bearing and a column bearing are arranged at one end of the motor, and a column bearing is arranged at the other end of the motor. The bearing arrangement of the motor can be set according to the actual use condition.
In the above method, as a more preferred implementation manner, the bearing protection method for large-scale motor transportation according to the embodiment of the present invention further includes the following steps after the third step: and removing the pre-compression device 7, and transporting the motor. In the invention, the pre-tightening device 7 applies axial pre-tightening force to the end surface of the rotating shaft 5 when the locking bolt 6 is screwed into the radial threaded through hole, and the pre-tightening device 7 can be removed after the locking bolt 6 is installed, so that the transportation process is more convenient.
In the method, the pre-compression device 7 in the embodiment of the invention comprises the pressing plate 71, the tightening screw 72 and the mounting nut 73, wherein the pressing plate 71 is arranged on one side of the motor and is abutted against the rotating shaft 5, the tightening screw 72 passes through the pressing plate 71 and is abutted against one side of the bearing outer cover 1 far away from the motor bearing seat 2, the mounting nut 73 is arranged on the tightening screw 72, the mounting nut 73 is positioned on the outer side of the pressing plate 71, the pre-compression force is applied to the rotating shaft 5 through the pressing plate 71, and the pre-compression force can be accurately quantified through torque.
In the above-described method, the pre-compression device 7 in the embodiment of the present invention is not limited to the above-described embodiment, and the pre-compression device 7 in the embodiment of the present invention may be: an oil cylinder or an air cylinder for applying a pretightening force to the end face of the rotating shaft 5.
In the above method, at least one group of the locking bolts 6 is provided in the embodiment of the present invention, when only one group of the locking bolts 6 is provided, the end face of the locking bolt 6 abuts against the outer surface of the outer oil seal 4, and the radial installation play between the bearing 3 and the rotating shaft 5 is eliminated under the action of the abutting force of the locking bolt 6.
When the lock bolts 6 are provided in a group, two kinds of embodiments of the lock bolts 6 may be provided, and as one embodiment, the lock bolts 6 in the embodiment of the present application are provided above the rotation shaft 5, and the end surfaces of the lock bolts 6 abut against the upper surface of the outer oil seal 4. As another embodiment, the locking bolt 6 in the embodiment of the present application is disposed below the outer oil seal 4, and the end surface of the locking bolt 6 abuts against the lower surface of the outer oil seal 4. In the above two methods, as a more preferable embodiment, the locking bolt 6 in the embodiment of the present application is disposed above the rotating shaft 5, and the radial force applied to the locking bolt 6 is smaller and the reliability is higher when the locking bolt 6 is disposed above the rotating shaft 5 than when the locking bolt 6 is disposed below the rotating shaft 5.
In the above method, the lock bolts 6 in the embodiment of the present invention may be provided with a plurality of groups, the lock bolts 6 are arranged at intervals around the circumference of the outer oil seal 4, and the radial installation play of the bearing 3 is eliminated by the plurality of groups of lock bolts 6.
In the above method, two embodiments of the locking bolt 6 are arranged around the circumference of the outer oil seal 4, as one embodiment, the radial threaded through hole in the embodiment of the invention is arranged at one side of the rotating shaft 5, the locking bolt 6 passes through the radial threaded through hole to be abutted with the outer surface of the outer oil seal 4, and the resultant force of the acting force of each locking bolt 6 on the outer oil seal 4 is in the same direction, and the radial installation clearance of the bearing 3 is eliminated through a plurality of groups of locking bolts 6, so that the rotating shaft cannot generate relative movement and cannot damage the bearing in the transportation process.
As another implementation manner, as shown in fig. 4 and 5, in the embodiment of the present invention, a plurality of groups of locking bolts 6 are provided, and the locking bolts are uniformly spaced around the circumference of the outer oil seal 4, each locking bolt passes through a radial threaded through hole to be abutted against the outer surface of the outer oil seal 4, the resultant force of each locking bolt 6 is equal to the gravity of the rotating shaft and opposite in direction, and the rotating shaft 5 is fixed by the locking bolts 6, at this time, the rotating shaft is relatively fixed between the inner ring of the bearing and the outer ring of the bearing, the rotating shaft and the inner ring of the bearing are suspended and fixed in the outer ring of the bearing, and during the transportation, the rotating shaft 5 does not generate radial play, thereby avoiding damage to the bearing.
In the above method, as shown in fig. 6, as a more preferable embodiment, in order to determine that the rotating shaft 5 is fixed in the bearing 3, the method further includes the following steps between the second step and the third step: mounting the dial indicator 1 on the outer cover, and enabling the probe 82 of the dial indicator 1 to be in contact with the rotating shaft 5 to obtain an initial value of the probe 82 of the dial indicator 1; lifting one end of the rotating shaft 5 by a lifting device 83 until the numerical value displayed by the dial indicator is not changed any more, so as to obtain a measured value of the probe 82 of the dial indicator 1; the difference between the measured value and the initial value is the installation clearance between the bearing 3 and the rotating shaft 5.
In the above method, the lifting device in the embodiment of the present invention is provided with the electronic scale 84, so as to prevent the lifting device 83 from lifting the motor.
In the above method, the third step of the method for protecting a bearing for transporting a large motor according to the embodiment of the present invention specifically includes: the locking bolts 6 are tightened until the probe 82 of the dial indicator 1 is between the initial value and the measured value, at which point the end face of each locking bolt 6 is in contact with the outer surface of the outer oil seal 4. At this time, the rotating shaft is fixed through each locking bolt, so that the radial movement of the rotating shaft is avoided, and the damage to the bearing is caused.
In order to facilitate the operation, in the above method, after the step of "bringing the probe 82 of the dial indicator 1 into contact with the rotating shaft 5" and before the step of "lifting one end of the rotating shaft 5 by the lifting device 83", the dial indicator 1 is zeroed, at this time, the initial value of the probe 82 of the dial indicator 1 is zero, the installation play is the measured value of the probe 82 of the dial indicator 1, and the operation is more convenient.
In the above method, as a more preferable embodiment, "tightening each lock bolt 6 until the probe 82 of the dial indicator 1 is located between the initial value and the measured value" in the embodiment of the present invention is specifically: the locking bolts 6 are tightened until the values indicated in the dial indicator 1 are half the measured values.
In the above method, as a more preferable embodiment, the surface of the outer oil seal 4 contacting the lock bolt 6 in the embodiment of the present invention is a plane. The contact area between the locking bolt 6 and the outer oil seal 4 is increased, the friction force between the locking bolt 6 and the outer oil seal 4 is increased, the rolling bodies of the bearing can be effectively fixed, and the fixing effect is more reliable.
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 (6)
1. The bearing protection method for the transportation of the large motor is characterized by comprising the following steps of:
Step one, fixing a bearing outer cover (1) on a motor bearing seat (2) so that the bearing outer cover (1) presses an outer ring of a bearing (3), wherein radial threaded through holes are formed in the circumferential direction of a boss of the bearing outer cover (1);
fixing an outer oil seal (4) on a rotating shaft (5), wherein the outer oil seal (4) presses the inner ring of the bearing (3), and the boss is sleeved on the outer side of the outer oil seal (4);
thirdly, screwing a locking bolt (6) into the radial threaded through hole, wherein the end face of the locking bolt (6) is abutted against the outer surface of the outer oil seal (4) so that the bearing (3) and the rotating shaft (5) are relatively fixed;
the bearing arrangement of the motor comprises a ball bearing, and further comprises the following steps between the second step and the third step:
An axial pre-tightening force is applied to the end face of the rotating shaft (5) through a pre-tightening device (7), so that the installation clearance of the ball bearing is eliminated;
After the third step, the method further comprises the following steps:
Removing the pre-compression device (7) and transporting the motor;
after the second step, the method further comprises the following steps:
Mounting a dial indicator (81) on the bearing outer cover (1), and enabling a probe (82) of the dial indicator (81) to be in contact with the rotating shaft (5) to obtain an initial value of the dial indicator (81);
slowly lifting one end of the rotating shaft (5) through a lifting device (83) until the numerical value of the dial indicator (81) is not changed any more, and obtaining a measured value of the dial indicator (81);
the difference between the initial value and the measured value is the radial installation clearance between the rotating shaft (5) and the bearing (3);
The third step is specifically as follows:
And screwing each locking bolt (6) until the display value of the dial indicator (81) is between the initial value and the measured value, and at the moment, the end surfaces of the locking bolts (6) are all abutted with the outer surface of the outer oil seal (4).
2. The method for protecting a bearing for transportation of a large motor according to claim 1, wherein,
The precompression device (7) comprises:
A pressing plate (71) arranged on one side of the motor and abutted against the rotating shaft (5);
And the bearing outer cover (1) passes through the pressing plate (71) and is abutted against the side, away from the motor bearing seat (2), of the bearing outer cover, a jacking screw (72) is arranged on the jacking screw (72), and a mounting nut (73) positioned on the outer side of the pressing plate (71) is arranged on the jacking screw (72).
3. The method for protecting a bearing for transportation of a large motor according to claim 1 or 2, wherein,
The locking bolts (6) are provided with a plurality of groups, and the locking bolts (6) are arranged at intervals around the circumference of the outer oil seal (4).
4. The method for protecting a bearing for transportation of a large motor according to claim 3, wherein,
The radial threaded through hole is arranged on one side of the rotating shaft (5), and the resultant force of each locking bolt (6) on the outer oil seal (4) is in the same direction.
5. The method for protecting a bearing for transportation of a large motor according to claim 3, wherein,
The locking bolts are uniformly arranged at intervals around the circumference of the outer oil seal (4), and each locking bolt (6) passes through the radial threaded through hole to be abutted with the outer surface of the outer oil seal (4).
6. The method for protecting a bearing for transportation of a large motor according to any one of claims 1 to 2, 4 to 5,
The surface of the outer oil seal (4) contacted with the locking bolt (6) is a plane.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210038488.1A CN114337132B (en) | 2022-01-13 | 2022-01-13 | Bearing protection method for large-scale motor transportation |
| PCT/CN2022/143605 WO2023134464A1 (en) | 2022-01-13 | 2022-12-29 | Bearing protection method in transportation of large-scale motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210038488.1A CN114337132B (en) | 2022-01-13 | 2022-01-13 | Bearing protection method for large-scale motor transportation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114337132A CN114337132A (en) | 2022-04-12 |
| CN114337132B true CN114337132B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210038488.1A Active CN114337132B (en) | 2022-01-13 | 2022-01-13 | Bearing protection method for large-scale motor transportation |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114337132B (en) |
| WO (1) | WO2023134464A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337132B (en) * | 2022-01-13 | 2024-04-26 | 中车株洲电机有限公司 | Bearing protection method for large-scale motor transportation |
| CN115059693A (en) * | 2022-06-30 | 2022-09-16 | 江苏中车电机有限公司 | Motor transportation bearing protection method |
Citations (6)
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| CN112713726A (en) * | 2020-12-25 | 2021-04-27 | 中车永济电机有限公司 | Traction motor bearing transportation protection tool with shaft extension |
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| CN103607065B (en) * | 2013-11-25 | 2016-02-03 | 南车株洲电机有限公司 | The manufacture method of bearing insulation device, bearing insulation device, and variable-frequency motor |
| CN111669020B (en) * | 2020-06-22 | 2021-09-24 | 中车株洲电机有限公司 | Disassembly and assembly method for preventing over-positioning motor bearing from being disassembled |
| CN111687786A (en) * | 2020-06-22 | 2020-09-22 | 中车株洲电机有限公司 | Disassembly and assembly method for preventing over-positioning motor bearing from being disassembled |
| CN114337132B (en) * | 2022-01-13 | 2024-04-26 | 中车株洲电机有限公司 | Bearing protection method for large-scale motor transportation |
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- 2022-01-13 CN CN202210038488.1A patent/CN114337132B/en active Active
- 2022-12-29 WO PCT/CN2022/143605 patent/WO2023134464A1/en unknown
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| US4309062A (en) * | 1979-09-21 | 1982-01-05 | Emerson Electric Co. | Bearing movement preventing system |
| CN203082048U (en) * | 2012-12-20 | 2013-07-24 | 比亚迪股份有限公司 | Bearing clearance controllable installation device |
| CN103884259A (en) * | 2014-04-08 | 2014-06-25 | 湖南南方宇航高精传动有限公司 | Bearing play measuring device |
| CN206422662U (en) * | 2017-02-15 | 2017-08-18 | 中车株洲电机有限公司 | A kind of motor |
| CN213305169U (en) * | 2020-09-24 | 2021-05-28 | 宁夏西北骏马电机制造股份有限公司 | Motor shaft capable of preventing rotation and channeling |
| CN112713726A (en) * | 2020-12-25 | 2021-04-27 | 中车永济电机有限公司 | Traction motor bearing transportation protection tool with shaft extension |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023134464A1 (en) | 2023-07-20 |
| CN114337132A (en) | 2022-04-12 |
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