CN112324809A - Auxiliary device and method for adjusting axial clearance of paired spherical roller thrust bearing - Google Patents
Auxiliary device and method for adjusting axial clearance of paired spherical roller thrust bearing Download PDFInfo
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- CN112324809A CN112324809A CN202011344717.XA CN202011344717A CN112324809A CN 112324809 A CN112324809 A CN 112324809A CN 202011344717 A CN202011344717 A CN 202011344717A CN 112324809 A CN112324809 A CN 112324809A
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- bearing
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- inner ring
- spherical roller
- roller thrust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C43/00—Assembling bearings
- F16C43/04—Assembling rolling-contact bearings
- F16C43/06—Placing rolling bodies in cages or bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/46—Gap sizes or clearances
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention discloses an auxiliary device and a method for adjusting axial clearance of a paired spherical roller thrust bearing, wherein the auxiliary device comprises a simulation shaft, a simulation bearing sleeve and a pressing plate; the simulation shaft is provided with a bearing mounting journal which is in clearance fit with an inner ring of the spherical roller thrust bearing, one end of the simulation shaft is provided with a bearing limiting disc, and the other end of the simulation shaft is provided with a pressing plate connecting structure provided with a pressing plate; the simulation bearing sleeve is of an annular sleeve structure with a set thickness, can be sleeved on the periphery of the inner ring bushing, and is provided with a spring mounting hole for mounting a spring or a simulation spring. The adjusting method is implemented based on the device, the simulated gap is detected through simulation installation, the actual gap is converted by combining the actual product size, the actual gap is judged according to the design requirement, and compensation is performed when the gap is unqualified. The invention has the advantages that the adjusting device has simple structure and reliable function, and can be conveniently used for simulating and adjusting the axial clearance of the paired spherical roller thrust bearing; the adjusting method can improve the assembly efficiency and eliminate the hidden danger of pulling damage of the shaft surface and the bearing.
Description
Technical Field
The invention relates to an axial clearance adjusting technology of a paired spherical roller thrust bearing, in particular to an auxiliary device and method for adjusting the axial clearance of the paired spherical roller thrust bearing.
Background
In the domestic mechanical industry, the use of bearings is very common, and spherical roller thrust bearings which are used in a matched mode and are pre-tightened by springs are also often applied to the places where axial thrust is borne by a gear box in the building material industry.
As shown in fig. 1, a power input assembly of a certain product is used in a paired manner, and spherical roller thrust bearings 2 pre-tightened by springs 1 are adopted, the outer rings of the two spherical roller thrust bearings 2 are limited by two end faces of a partition on a bearing sleeve 6 with relatively fixed positions, and a plurality of spring mounting through holes provided with the springs 1 are distributed in the circumferential direction of the partition. Two spherical roller thrust bearings 2 bear axial thrust in gear transmission, generally, the adjustment of bearing clearance is realized by respectively hot-mounting two bearings on a gear shaft 3, assembling other parts according to a drawing, symmetrically sucking and placing two dial indicator chassis on an input end cover 4, symmetrically placing dial indicator heads on the shaft end of the gear shaft, detecting the axial clearance of the bearings by an axial push-pull gear shaft, recording data, grinding an inner ring bush 5 between the two bearings to ensure that the axial clearance is within a required range, grinding the inner ring bush 5, and then re-mounting the bearing on the gear bearing. However, the bearing inner ring is tightly matched with the journal of the gear shaft, and the bearing inner ring can be assembled in place by heating. To grind the bushing 5, the upper bearing inner race must be removed first. The common method is to inject pressure oil into the oil duct of the gear shaft by using oil drain holes, and pull out the bearing after expanding the inner ring. However, the operation process needs to be very careful and careless, the shaft surface of the bearing or the bearing mounting journal of the gear shaft 3 can be scratched by fine impurities, if the selected bearing is narrow in width, oil is likely to leak from two sides, so that oil pressure cannot be built, the bearing cannot be disassembled, the bearing can be taken down only by heating the bearing in a flame heating mode, and under most conditions, the bearing is unevenly heated and slightly deformed, and the shaft surface can be scratched when the bearing is pulled out.
In order to avoid the damage of the shaft surface, the prior art adopts a mode of pre-grinding before assembly, pre-grinding is carried out according to an empirical value of the grinding amount of an adjusting pad before the same type and the same bearing, and verification is carried out after assembly. However, the deviation of the check value often occurs under the influence of environmental temperature and machining errors, and the problem that the bush needs to be ground in the assembly process of part of products still can be caused, so that the assembly efficiency is affected.
How to assemble the spherical roller thrust bearing which is pre-tightened by the spring and used in a matched mode fast and accurately, time is not wasted when an axial clearance is adjusted, and a shaft surface or a bearing cannot be pulled, so that the problem that a person skilled in the art needs to solve is solved urgently.
Disclosure of Invention
The invention aims to overcome the defect that the axial clearance of the existing paired spherical roller thrust bearing is damaged by pulling, and provides an auxiliary device for adjusting the axial clearance of the paired spherical roller thrust bearing. The second purpose of the present invention is to provide a method for adjusting the axial clearance of a spherical roller thrust bearing pair based on the aforementioned auxiliary device, so as to complete the assembly at one time, improve the assembly efficiency, effectively avoid the axial surface or the bearing from being damaged by strain, and be not limited by the width of the bearing.
In order to achieve the first object, the invention adopts the following technical scheme.
An auxiliary device for adjusting axial clearance of a paired spherical roller thrust bearing comprises a simulation shaft, a simulation bearing sleeve and a pressing plate; the simulation shaft is provided with a bearing mounting journal which is in clearance fit with an inner ring of the spherical roller thrust bearing, one end of the simulation shaft is integrally formed or fixedly connected with a bearing limiting disc, and the other end of the simulation shaft is provided with a pressing plate connecting structure provided with the pressing plate; the simulation bearing sleeve is of an annular sleeve structure with a set thickness, can be sleeved on the periphery of the inner ring bushing and is provided with a spring mounting hole for arranging a spring or a simulation spring.
The device adopting the technical scheme is used for obtaining a simulated clearance value through simulated assembly, then determining the grinding amount of the length of the inner ring bushing through comparison of the actual clearance value and the designed clearance value, or adding a gasket or replacing the inner ring bushing and other clearance compensation modes, and achieving the design clearance requirement during actual assembly of a product. Because the bearing mounting journal of the simulation shaft is in clearance fit with the inner ring of the spherical roller thrust bearing, the corresponding inner ring bushing cannot form a close fit state with the simulation shaft, and therefore, the bearing or the simulation shaft cannot be damaged by pulling in the bearing dismounting process; through clearance compensation, the phenomenon that the actual product is disassembled again to adjust the clearance after being assembled can be avoided, so that the assembly efficiency can be effectively improved, and the hidden danger of pulling damage of the shaft surface and the bearing is eliminated. In actual application, an actual product is fixed on the simulation shaft through the bearing, the inner ring bushing, the product spring or the simulation spring and the simulation bearing sleeve by the pressing plate; then, under the condition that one end face of the simulated bearing sleeve is tightly attached to the end face of the corresponding bearing outer ring, measuring a simulated gap between the other end face of the simulated bearing sleeve and the other corresponding bearing outer ring, and calculating an actual gap value through the difference between the thickness of the simulated bearing sleeve and the thickness of a partition in the actual product bearing sleeve; and finally, determining the clearance compensation amount and the compensation mode by comparing the actual clearance value with the designed clearance value, and assembling the actual product after compensation. The spring mounting holes on the simulation bearing sleeve can be through holes or blind holes, and when the blind holes are adopted, the springs can be completely compressed in the holes.
Preferably, the pressing plate connecting structure comprises a pressing plate bolt, and the pressing plate bolt is in threaded fit connection with a screw hole formed in the simulation shaft. The pressing plate is installed and pressed by utilizing a mature and convenient fixed connection mode.
Preferably, the pressure plate adopts an open pressure plate structure. So that after the bolt is loosened, the disassembly pressing plate is transversely pulled, and the disassembly pressing plate is not needed after the bolt is disassembled, thereby further improving the operation convenience.
Preferably, the bearing limiting disc and the bearing mounting journal are of an integral structure, and a connecting part of the bearing limiting disc and the bearing mounting journal is provided with a degassing groove. So as to ensure the integral rigidity and the accuracy and the stability of the installation position of the bearing; and conveniently adopt the abrasive machining mode, the bearing inner race of installation axle journal and bearing spacing dish leans on the face in proper order the grinding, improves the processing convenience, reduces the processing cost.
Preferably, the inner hole of the simulated bearing sleeve and the periphery of the inner ring bushing form a column hole matching structure in clearance fit. The simulation bearing sleeve is prevented from being eccentric with the simulation shaft, the plurality of springs or the simulation springs are ensured to form circumferential distribution with the axis of the simulation shaft, deflection or inclination caused by uneven stress of the bearing outer ring is avoided, and the measurement accuracy of the simulation clearance value is ensured.
In order to achieve the second object, the invention adopts the following technical scheme.
A method for adjusting axial clearance of a paired spherical roller thrust bearing is implemented on the basis of an auxiliary device for realizing a first development; the method comprises the following steps:
step one, equipment work: assembling two spherical roller thrust bearings, an inner ring bushing, a simulation bearing sleeve and a spring or a simulation spring which are paired on a simulation shaft through a pressing plate in sequence, so that two end faces of the inner ring bushing are respectively attached to the end faces of the inner rings of the corresponding spherical roller thrust bearings, and a simulation assembly state of the spherical roller thrust bearings which are paired and used is formed; measuring and recording the thickness of a baffle of the bearing sleeve, the length of the inner ring bushing and the thickness of the simulated bearing sleeve;
secondly, simulating clearance value measurement: under the simulated assembly state, one end face of the simulated bearing sleeve is tightly attached to the end face of the outer ring of the corresponding spherical roller thrust bearing, and the clearance value between the other end face of the simulated bearing sleeve and the end face of the outer ring of the other spherical roller thrust bearing is measured;
thirdly, calculating an actual gap value: calculating an actual gap value according to a calculation formula of A + C-B;
fourthly, judging the qualification: judging whether the actual clearance value obtained by calculation is qualified or not by taking the design clearance value as a standard, and executing the sixth step if the actual clearance value is qualified; if not, executing the next step;
fifthly, lining length compensation: compensating the length of the inner ring bushing according to the difference value between the unqualified actual clearance value and the designed clearance value, and executing the next step after the length of the inner ring bushing reaches the standard of the designed clearance value;
sixthly, marking qualification: and (4) taking the two spherical roller thrust bearings and the inner ring bushing which pass the simulation assembly test and the bearing sleeve which is matched with and calculates the actual clearance value as a qualified mark.
By adopting the adjusting method of the technical scheme, the actual product is fixed on the simulation shaft by the pressure plate through the bearing, the inner ring bushing, the product spring or the simulation spring and the simulation bearing sleeve; then, under the condition that one end face of the simulated bearing sleeve is tightly attached to the end face of the corresponding bearing outer ring, measuring a simulated gap between the other end face of the simulated bearing sleeve and the other corresponding bearing outer ring, and calculating an actual gap value through the difference between the thickness of the simulated bearing sleeve and the thickness of a partition in the actual product bearing sleeve; and finally, determining the clearance compensation amount and the compensation mode by comparing the actual clearance value with the designed clearance value, and assembling the actual product after compensation. The method can realize batch or small-batch assembly under the condition of fully ensuring the processing precision. Certainly, the two spherical roller thrust bearings, the inner ring bushing and the bearing sleeve which are matched for simulation debugging can also be matched and marked for being assembled on the power input assembly of the same product, so that the clearance value can be ensured more, and higher precision requirements are not required to be provided in the processing process of related parts. In the bearing dismounting process, the bearing or the simulation shaft cannot be pulled; through clearance compensation, the phenomenon that the actual product is disassembled again to adjust the clearance after being assembled can be avoided, so that the assembly efficiency can be effectively improved, and the hidden danger of pulling damage of the shaft surface and the bearing is eliminated. In the preparation working step, except that the length measurement of the inner ring bushing needs to be carried out before the simulation debugging and assembly, the blocking thickness of the bearing sleeve and the thickness of the simulation bearing sleeve can be carried out before and after the assembly.
Preferably, in the bushing length compensation step, the bushing length compensation includes one of grinding an end face of the inner ring bushing, adding an adjustment shim, or replacing the inner ring bushing having a length greater than an actually measured value. Compensation is carried out in multiple compensation modes, so that the compensation convenience and the practicability are improved, wherein the grinding of the end face of the inner ring bushing is suitable for the situation that the simulated clearance value is greater than the design requirement; on the contrary, compensation is carried out by additionally arranging an adjusting gasket or replacing the inner ring bushing with the length larger than the measured value, and when the replaced inner ring bushing causes the gap design requirement, compensation is carried out again by adopting a grinding end face mode.
Preferably, in the equipping step, the simulation spring is selected to have a stiffness smaller than that of a spring used in an actual product. The convenience of simulation assembly is improved, and the rigidity of the bearing outer ring meets the requirement that the preload given to the bearing outer ring can eliminate the clearance between the bearing inner ring and the bearing outer ring.
Preferably, in the step of assembling, before measuring the length of the inner ring bush, the method further includes confirming parallelism of two end faces of the inner ring bush. The length measuring result is ensured to be accurate, the inner rings of the two bearings are ensured to be parallel to the opposite planes under the condition of simulated assembly, and the accuracy of the simulated debugging result is improved.
The invention has the advantages that the adjusting device has simple structure and reliable function, and can be conveniently used for simulating and adjusting the axial clearance of the paired spherical roller thrust bearing; the operation of the adjusting method does not strain the bearing or the simulation shaft in the bearing dismounting process; through clearance compensation, the phenomenon that the actual product is disassembled again to adjust the clearance after being assembled can be avoided, so that the assembly efficiency can be effectively improved, and the hidden danger of pulling damage of the shaft surface and the bearing is eliminated.
Drawings
FIG. 1 is a schematic diagram of a product with a mating spherical roller thrust bearing to which the simulation apparatus and method of the present invention are applied.
FIG. 2 is a schematic diagram of the simulation apparatus according to the present invention.
Fig. 3 is a partial structural schematic diagram of a bearing sleeve in a product suitable for use in the method of the present invention.
The above figures are also used to illustrate the simulation method of the present invention.
Detailed Description
The present invention is further described with reference to the accompanying drawings, but the invention is not limited thereby within the scope of the described embodiments.
The pressing plate connecting structure comprises a pressing plate bolt 10, and the pressing plate bolt 10 is connected with a screw hole formed in the simulation shaft 7 in a threaded fit mode. The pressing plate 9 adopts an open pressing plate structure. The bearing limiting disc and the bearing mounting journal are of an integral structure, and a degassing groove is formed at the connecting part of the bearing limiting disc and the bearing mounting journal.
In this embodiment, the pressing plate connection structure may also include a screw section extending from the free end of the simulation shaft 7, and the pressing plate 9 is pressed against the bearing outer ring by a pressing nut disposed on the screw.
In this embodiment, the spring mounting hole on the dummy bearing sleeve 8 may also be a blind hole, and the spring 1 or the dummy spring can be completely compressed in the hole.
step one, equipment work: the method comprises the steps that two spherical roller thrust bearings 2, an inner ring bushing 5, a simulation bearing sleeve 8 and a spring 1 or a simulation spring which are paired are sequentially assembled on a simulation shaft 7 through a pressing plate 9, so that two end faces of the inner ring bushing 5 are respectively attached to the end faces of inner rings of the corresponding spherical roller thrust bearings 2, and a simulation assembly state for pairing the spherical roller thrust bearings is formed; measuring and recording the blocking thickness B of the bearing sleeve 6, the length D of the inner ring bush 5 and the thickness C of the simulated bearing sleeve 8;
secondly, simulating clearance value measurement: in a simulated assembly state, one end face of the simulated bearing sleeve 8 is tightly attached to the end face of the outer ring of the corresponding spherical roller thrust bearing 2, and a clearance value A between the other end face of the simulated bearing sleeve 8 and the end face of the outer ring of the other spherical roller thrust bearing 2 is measured;
thirdly, calculating an actual gap value: calculating an actual gap value according to a calculation formula of A + C-B;
fourthly, judging the qualification: judging whether the actual clearance value obtained by calculation is qualified or not by taking the design clearance value as a standard, and executing the sixth step if the actual clearance value is qualified; if not, executing the next step;
fifthly, lining length compensation: compensating the length D of the inner ring bush 5 according to the difference value between the unqualified actual clearance value and the designed clearance value, and executing the next step after the design clearance value standard is reached;
sixthly, marking qualification: and marking the two spherical roller thrust bearings 2 and the inner ring bush 5 which pass the simulation assembly test and the bearing sleeve 6 which is matched with the actual clearance value for calculation as a qualified mark.
In the step of assembling, the selecting stiffness of the simulated spring is smaller than that of a spring used in an actual product, and before measuring the length D of the inner ring bush 5, the method further includes confirming parallelism of two end faces of the inner ring bush 5. In the bushing length compensation step, the bushing length compensation is performed by one of grinding the end face of the inner ring bushing 5, adding an adjusting shim or replacing the inner ring bushing 5 with a length D greater than an actually measured value.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. An auxiliary device for adjusting axial clearance of a paired spherical roller thrust bearing is characterized by comprising a simulation shaft (7), a simulation bearing sleeve (8) and a pressure plate (9); the simulation shaft (7) is provided with a bearing mounting journal which is in clearance fit with the inner ring of the spherical roller thrust bearing (2), one end of the simulation shaft (7) is integrally formed or fixedly connected with a bearing limiting disc, and the other end of the simulation shaft (7) is provided with a pressing plate connecting structure provided with a pressing plate (9); the simulation bearing sleeve (8) is of an annular sleeve structure with a set thickness, the simulation bearing sleeve (8) can be sleeved on the periphery of the inner ring bushing (5), and is provided with a spring mounting hole for arranging a spring (1) or a simulation spring.
2. Auxiliary device according to claim 1, characterized in that the pressure plate connecting structure comprises a pressure plate bolt (10), and the pressure plate bolt (10) is in threaded fit connection with a screw hole arranged on the simulation shaft (7).
3. Auxiliary device according to claim 1, characterized in that the pressure plate (9) is of an open pressure plate construction.
4. The auxiliary device according to any one of claims 1 to 3, wherein the bearing limiting disc and the bearing mounting journal are of an integral structure, and a degassing groove is formed at the connection part of the bearing limiting disc and the bearing mounting journal.
5. The auxiliary device according to any one of claims 1-3, characterized in that the inner hole of the dummy bearing sleeve (8) and the outer circumference of the inner ring bushing (5) form a clearance-fit cylindrical hole fit structure.
6. A method for adjusting an axial clearance of a paired spherical roller thrust bearing, which is implemented based on the auxiliary device of any one of claims 1 to 5; the method comprises the following steps:
step one, equipment work: the method comprises the steps that two spherical roller thrust bearings (2), an inner ring bush (5), a simulation bearing sleeve (8) and a spring (1) or a simulation spring which are paired are sequentially assembled on a simulation shaft (7) through a pressing plate (9), so that two end faces of the inner ring bush (5) are respectively attached to the end faces of inner rings of the corresponding spherical roller thrust bearings (2), and a simulation assembly state for pairing the spherical roller thrust bearings is formed; measuring and recording the blocking thickness (B) of the bearing sleeve (6), the length (D) of the inner ring bushing (5) and the thickness (C) of the simulated bearing sleeve (8);
secondly, simulating clearance value measurement: under the condition of simulated assembly, one end face of a simulated bearing sleeve (8) is tightly attached to the end face of the outer ring of the corresponding spherical roller thrust bearing (2), and the clearance value (A) between the other end face of the simulated bearing sleeve (8) and the end face of the outer ring of the other spherical roller thrust bearing (2) is measured;
thirdly, calculating an actual gap value: calculating an actual gap value according to a calculation formula of A + C-B;
fourthly, judging the qualification: judging whether the actual clearance value obtained by calculation is qualified or not by taking the design clearance value as a standard, and executing the sixth step if the actual clearance value is qualified; if not, executing the next step;
fifthly, lining length compensation: compensating the length (D) of the inner ring bushing (5) according to the difference value between the unqualified actual clearance value and the designed clearance value, and executing the next step after the designed clearance value standard is reached;
sixthly, marking qualification: and (3) taking the two spherical roller thrust bearings (2) and the inner ring bushing (5) which pass the simulation assembly test and the bearing sleeve (6) which is matched with the actual clearance value to be calculated as qualified marks.
7. Method according to claim 6, characterized in that in the bushing length compensation step, the bushing length compensation comprises one of grinding the end face of the inner ring bushing (5), adding shims or replacing the inner ring bushing (5) with a length (D) that is larger than the measured value.
8. The method according to claim 6 or 7, wherein in the equipping step, the simulated springs are selected to have a stiffness that is less than a stiffness of a spring used in an actual product.
9. A method according to claim 6 or 7, characterized in that in the equipping step, before measuring the length (D) of the inner ring bush (5), it further comprises verifying the parallelism of the two end faces of the inner ring bush (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011344717.XA CN112324809A (en) | 2020-11-25 | 2020-11-25 | Auxiliary device and method for adjusting axial clearance of paired spherical roller thrust bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011344717.XA CN112324809A (en) | 2020-11-25 | 2020-11-25 | Auxiliary device and method for adjusting axial clearance of paired spherical roller thrust bearing |
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| CN112324809A true CN112324809A (en) | 2021-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011344717.XA Pending CN112324809A (en) | 2020-11-25 | 2020-11-25 | Auxiliary device and method for adjusting axial clearance of paired spherical roller thrust bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820129A (en) * | 2021-08-17 | 2021-12-21 | 河北汉光重工有限责任公司 | Axial adjusting device and method for shafting |
-
2020
- 2020-11-25 CN CN202011344717.XA patent/CN112324809A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820129A (en) * | 2021-08-17 | 2021-12-21 | 河北汉光重工有限责任公司 | Axial adjusting device and method for shafting |
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