CN114295373A - Simple and universal bearing starting torque measuring device and measuring method - Google Patents
Simple and universal bearing starting torque measuring device and measuring method Download PDFInfo
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- CN114295373A CN114295373A CN202111513509.2A CN202111513509A CN114295373A CN 114295373 A CN114295373 A CN 114295373A CN 202111513509 A CN202111513509 A CN 202111513509A CN 114295373 A CN114295373 A CN 114295373A
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Abstract
The invention belongs to the technical field of aviation structure performance testing, and particularly relates to a simple and universal bearing starting torque measuring device and a measuring method, which are used for measuring the no-load starting torque of a self-lubricating bearing, wherein the device consists of a torque screwdriver, a connecting sleeve and a nut; the torque screwdriver is provided with a torque scale display, and the connecting sleeve is matched with the nut to fix the bearing inner ring; the torque screwdriver is connected with the end part of the connecting sleeve; under a certain rotating torque, the torque screwdriver can be rotated to drive the bearing inner ring to rotate relative to the outer ring. The invention adopts a mode of combining a torque screwdriver and a self-made tool to measure the starting torque of the self-lubricating bearings with different sizes. Adopt the device, can high-efficient and convenient measuring start-up moment from lubricated bearing to have the commonality, adopt corresponding clamping frock to carry out corresponding start-up moment to the bearing of equidimension not and measure.
Description
Technical Field
The invention belongs to the technical field of aviation structure performance testing, and particularly relates to a device for measuring the no-load starting torque of a self-lubricating bearing, which is used for accurately measuring the no-load starting torque of the bearing after press mounting.
Background
The no-load starting torque test method of the self-lubricating joint bearing needs to meet the design requirement of HB 20328-; with the development of the technology, the requirement on the assembly precision is higher and higher, and the measurement accuracy and precision requirement are stricter and stricter. In order to measure the no-load starting torque of the bearing more efficiently and conveniently, the simple and universal device for measuring the bearing starting torque is designed.
In the prior art, patent CN102527743A discloses a system and a method for detecting and controlling torque of a self-lubricating spherical plain bearing on line in real time, and the bearing aimed at in the patent belongs to measurement of factory starting torque after design. The measuring device can only be applied to torque measurement of a single independent bearing, a torque sensor, a plurality of couplers and a driving motor are adopted, the structure of the measuring device which depends on the torque sensor is complex, the requirement on the consistency of parts is high, the measuring device is not suitable for measurement of bearing starting torque in an aviation type special-shaped assembly, other accessory accessories exist in the space for assembling the bearing, and the surface of the part is easy to damage in clamping measurement.
Patent CN206627240U discloses a bearing start-up moment measuring device, and the device is used for measuring the start-up moment of bearing, adopts torque table, closing device, dabber, and its closing device comprises a plurality of part cooperations, and the bearing outer lane adopts the fixed form of chuck, to the bearing that has already assembled, is subject to its mounting form, and measuring device in the patent is not suitable for the more complicated subassembly of installation bearing of structure. In the testing process, after the measuring device is installed, the starting torque is obtained by clockwise and anticlockwise rotation measurement respectively, and the force applied by the measuring mode to rotate the bearing is uneven, so that the measuring error is caused; due to the inconsistent initial starting moments of the bearings, the application of uniform force may result in the inner race of the bearing not being able to rotate relative to the outer race.
Disclosure of Invention
The purpose of the invention is as follows: the device capable of measuring the starting torque of the bearing is designed, and corresponding starting torque measurement can be carried out on bearings of different sizes by adopting corresponding clamping tools.
The technical scheme is as follows: the invention provides a simple and universal bearing starting torque measuring device on the one hand, which consists of a torque screwdriver, a connecting sleeve and a nut; the torque screwdriver is provided with a torque scale display, and the connecting sleeve is matched with the nut to fix the bearing inner ring; the torque screwdriver is connected with the end part of the connecting sleeve; under a certain rotating torque, the torque screwdriver can be rotated to drive the bearing inner ring to rotate relative to the outer ring.
Preferably, the accuracy of the torque screwdriver is not less than 1/10 of the minimum value of the starting torque of the bearing to be tested.
Preferably, the torque screwdriver and the connecting sleeve adopt a matching mode of an inner hexagonal hole and an outer hexagonal hole.
Preferably, the connecting sleeve is a step-shaped connecting shaft, a shaft with a smaller diameter is in clearance fit with an inner hole of the bearing inner ring, and the clearance is not more than 0.2 mm; prevent shaking during the measurement process.
Preferably, a gasket is arranged between the connecting sleeve and the bearing inner ring, so that the connecting sleeve and the bearing inner ring are fixed into a whole, and meanwhile, a certain protection effect is achieved on the bearing.
The invention also provides a simple and universal measuring method for the bearing starting torque, which adopts the measuring device, and when in measurement, firstly, the initial value of the measurement on the torque screwdriver is adjusted to be smaller than the theoretical torque value according to the theoretical torque value of the bearing starting given by design;
then, the torque screwdriver is rotated to drive the bearing inner ring to rotate; if the bearing inner ring generates autorotation motion relative to the outer ring at the moment, judging that the starting torque of the bearing is qualified;
then, adjusting and measuring the torque of the torque screwdriver until the torque screwdriver jumps, and at the moment, judging that the previous set torque value of the torque screwdriver starting to jump is the actual value of the bearing starting torque;
on the contrary, if the moment screwdriver jumps at a given initial test moment value, the given initial test moment value is smaller than the actual value of the bearing starting moment, at the moment, the initial test moment value of the moment screwdriver needs to be increased and torque is applied, and if the inner ring of the bearing generates autorotation motion relative to the outer ring at the moment, the starting moment of the bearing is judged to be qualified; and then, adjusting and measuring the torque of the torque screwdriver until the torque screwdriver jumps, and at the moment, judging that the previous set torque value of the torque screwdriver starting to jump is the actual value of the bearing starting torque.
Preferably, in the measuring process, the measuring initial value of the torque screwdriver is adjusted to be less than about 50% of the theoretical value of the bearing starting torque.
Preferably, in the measuring process, when the moment scale of the moment screwdriver is adjusted, if the difference between the moment scale value and the bearing starting moment is large, an adjusting mode of coarse adjustment and fine adjustment is adopted.
The beneficial technical effects are as follows: the invention adopts a mode of combining a torque screwdriver and a self-made tool to measure the starting torque of the self-lubricating bearings with different sizes. Adopt the device, can high-efficient and convenient measuring start-up moment from lubricated bearing to have the commonality, adopt corresponding clamping frock to carry out corresponding start-up moment to the bearing of equidimension not and measure.
Drawings
Fig. 1 is an overall effect diagram of the device of the present invention, which consists of a torque screwdriver with torque scale display, a connecting sleeve (the size can be customized according to the size of a bearing), washers (two), and a nut.
In the figure 1, 1 is a torque screwdriver, 2 is a connecting sleeve, 3-is a nut, 4 is a self-lubricating bearing, and 5 is a washer.
Fig. 2 is a schematic diagram of a torque screwdriver with torque scale display, which can accurately read a progress torque value with the accuracy of 0.01N · m.
Fig. 3 is a schematic structural diagram of the connecting sleeve, wherein the outer circular surface of the 3-1 is processed in a thread form, and the outer diameter can be customized according to the size of the inner diameter of the self-lubricating bearing.
FIG. 4 is a schematic view of a washer configuration for securing the bolt to prevent slippage and protect the self-lubricating bearing and housing; the number is 2.
Fig. 5 shows a nut for fixing a bearing in cooperation with a connecting sleeve, wherein the thread inner diameter specification is matched with the size of the connecting sleeve.
Fig. 6 is a schematic view of a self-lubricating bearing, which is an example bearing of the present invention, and is subject to practical application.
Detailed Description
To make the objects, structures and advantages of the embodiments of the present invention clearer, the structural dimensions of the embodiments of the present invention are described more clearly and completely below with reference to the accompanying drawings in the examples of the present invention:
referring to the attached drawing 1, the simple and universal bearing starting torque measuring device is composed of a torque screwdriver 1, a connecting sleeve 2 and a nut 3 in the whole structure; the torque screwdriver 1 is a torque screwdriver with torque scale display, and the connecting sleeve 2 is matched with the nut 3 to fix the inner ring of the self-lubricating bearing 4; the torque screwdriver 1 is connected with the end part of the connecting sleeve 2; under a certain rotating torque, the torque screwdriver 1 can drive the bearing inner ring to rotate relative to the outer ring.
Specifically, the assembled connection shown in fig. 1 is first made by selecting a suitably sized connection sleeve according to the dimensions of the inner diameter of the bearing of fig. 6. And after the assembly and the connection are finished, the matched nut shown in the figure 5 is adopted for screwing and fixing.
Adjusting the measurement initial value on the torque screwdriver to be smaller than the theoretical torque value according to the theoretical torque value of the bearing starting given by design; the moment screwdriver shown in the figure 2 is adjusted to a moment value (less than about 50%) smaller than the given moment value of the design blueprint, the adjusting times are reduced, the measuring period is shortened, and the moment screwdriver is rotated to drive the bearing inner ring to rotate. If the bearing inner ring generates autorotation motion relative to the outer ring at the moment, the no-load starting moment of the bearing is judged to be qualified. And then the moment screwdriver is adjusted until the moment screwdriver jumps, and the accurate no-load starting moment can be accurately measured. On the contrary, if the moment screwdriver jumps at a given initial test moment value, the given initial test moment value is smaller than the actual value of the bearing starting moment, at the moment, the initial test moment value of the moment screwdriver needs to be increased and torque is applied, and if the inner ring of the bearing generates autorotation motion relative to the outer ring at the moment, the starting moment of the bearing is judged to be qualified; and then, adjusting and measuring the torque of the torque screwdriver until the actual no-load starting torque value of the bearing is measured. At this time, the previously set torque value at which the torque screw starts to jump is determined as the actual value of the bearing starting torque.
It should be noted that, although not described in detail in the above embodiments, the embodiments are regarded as the prior art, and may be combined and superimposed to match each other by a simple combination in order to achieve the most basic functions and requirements of the invention. The embodiments do not limit the scope of the present invention, and in principle, other variations and combinations based on the design concept of the present invention fall within the scope of the present invention.
Claims (8)
1. A simple and universal bearing starting torque measuring device is characterized by comprising a torque screwdriver, a connecting sleeve and a nut; the torque screwdriver is provided with a torque scale display, and the connecting sleeve is matched with the nut to fix the bearing inner ring; the torque screwdriver is connected with the end part of the connecting sleeve; under a certain rotating torque, the torque screwdriver can be rotated to drive the bearing inner ring to rotate relative to the outer ring.
2. A simple universal bearing starting torque measuring device as claimed in claim 1 wherein the accuracy of said torque screwdriver is not less than 1/10 of the minimum bearing starting torque to be measured.
3. A simple universal bearing starting torque measuring device as claimed in claim 2 wherein the torque screwdriver and the coupling sleeve are in the form of internal and external hexagonal bore fits.
4. A simple and universal bearing starting torque measuring device as claimed in claim 3, wherein the connecting sleeve is a stepped connecting shaft, the smaller diameter shaft of the stepped connecting shaft is in clearance fit with the inner bore of the bearing inner race, and the clearance is not more than 0.2 mm; prevent shaking during the measurement process.
5. A simple universal bearing activated torque measurement device as claimed in claim 4 wherein a washer is provided between the coupling sleeve and the bearing inner race.
6. A simple and universal measuring method for bearing starting torque, which adopts the measuring device according to any one of claims 1-5, and is characterized in that when measuring, firstly, the initial value of the measurement on a torque screwdriver is adjusted to be smaller than the theoretical torque value according to the theoretical torque value of the bearing starting given by design;
then, the torque screwdriver is rotated to drive the bearing inner ring to rotate; if the bearing inner ring generates autorotation motion relative to the outer ring at the moment, judging that the starting torque of the bearing is qualified;
then, adjusting and measuring the torque of the torque screwdriver until the torque screwdriver jumps, and at the moment, judging that the previous set torque value of the torque screwdriver starting to jump is the actual value of the bearing starting torque;
on the contrary, if the moment screwdriver jumps at a given initial test moment value, the given initial test moment value is smaller than the actual value of the bearing starting moment, at the moment, the initial test moment value of the moment screwdriver needs to be increased and torque is applied, and if the inner ring of the bearing generates autorotation motion relative to the outer ring at the moment, the starting moment of the bearing is judged to be qualified; and then, adjusting and measuring the torque of the torque screwdriver until the torque screwdriver jumps, and at the moment, judging that the previous set torque value of the torque screwdriver starting to jump is the actual value of the bearing starting torque.
7. A simple and easy general bearing starting moment's measuring method of claim 6, characterized by, in the measurement process, the moment screwdriver's measurement initial value is adjusted to be less than about 50% of the theoretical value of the bearing starting moment.
8. A simple and universal bearing starting torque measuring method as claimed in claim 6, wherein in the measuring process, when the torque scale of the torque screwdriver is adjusted, if the torque scale value is different from the bearing starting torque greatly, the adjusting mode of coarse adjustment and fine adjustment is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111513509.2A CN114295373A (en) | 2021-12-10 | 2021-12-10 | Simple and universal bearing starting torque measuring device and measuring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111513509.2A CN114295373A (en) | 2021-12-10 | 2021-12-10 | Simple and universal bearing starting torque measuring device and measuring method |
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| CN114295373A true CN114295373A (en) | 2022-04-08 |
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| CN202111513509.2A Pending CN114295373A (en) | 2021-12-10 | 2021-12-10 | Simple and universal bearing starting torque measuring device and measuring method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207335937U (en) * | 2017-11-06 | 2018-05-08 | 成都飞机工业（集团）有限责任公司 | One kind has assembled self-lubricating knuckle bearing staring torque measuring device |
| CN110095217A (en) * | 2019-04-26 | 2019-08-06 | 杭州电子科技大学 | A kind of device and method measuring Frictional Moment for Rolling Bearings |
| JP2020098163A (en) * | 2018-12-19 | 2020-06-25 | 日本精工株式会社 | Starting torque measurement method of bearing device |
| CN112536743A (en) * | 2020-11-20 | 2021-03-23 | 昌河飞机工业（集团）有限责任公司 | Clamping device for testing starting torque of joint bearing |
| CN112824852A (en) * | 2019-11-21 | 2021-05-21 | 成都飞机工业（集团）有限责任公司 | Measuring clamp and measuring method for no-load starting torque of self-lubricating bearing |
-
2021
- 2021-12-10 CN CN202111513509.2A patent/CN114295373A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207335937U (en) * | 2017-11-06 | 2018-05-08 | 成都飞机工业（集团）有限责任公司 | One kind has assembled self-lubricating knuckle bearing staring torque measuring device |
| JP2020098163A (en) * | 2018-12-19 | 2020-06-25 | 日本精工株式会社 | Starting torque measurement method of bearing device |
| CN110095217A (en) * | 2019-04-26 | 2019-08-06 | 杭州电子科技大学 | A kind of device and method measuring Frictional Moment for Rolling Bearings |
| CN112824852A (en) * | 2019-11-21 | 2021-05-21 | 成都飞机工业（集团）有限责任公司 | Measuring clamp and measuring method for no-load starting torque of self-lubricating bearing |
| CN112536743A (en) * | 2020-11-20 | 2021-03-23 | 昌河飞机工业（集团）有限责任公司 | Clamping device for testing starting torque of joint bearing |
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