CN210719705U - Bearing life auxiliary testing device - Google Patents
Bearing life auxiliary testing device Download PDFInfo
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- CN210719705U CN210719705U CN201921285620.9U CN201921285620U CN210719705U CN 210719705 U CN210719705 U CN 210719705U CN 201921285620 U CN201921285620 U CN 201921285620U CN 210719705 U CN210719705 U CN 210719705U
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Abstract
The utility model discloses a bearing life auxiliary test device, include: the device comprises a test rotating shaft, a bearing fixing device and a radial force adjusting assembly; wherein, the test rotating shaft can rotate from the shaft; the bearing fixing device is sleeved on the test rotating shaft, is used for locking and fixing the test bearing on the test rotating shaft, and synchronously rotates with the test bearing along with the test rotating shaft; the radial force adjusting assembly coats the bearing fixing device, the test bearing and the test rotating shaft, is attached to the outer side of the test bearing, and is attached to the bearing fixing device to adjust the radial load force of the test bearing. The utility model provides a bearing life auxiliary test device is convenient for the decibel value in auxiliary bearing life to judge, effectively in advance to the bearing life auxiliary test device of the reliability rating of motor product fast.
Description
Technical Field
The utility model relates to a bearing life test technical field especially relates to a bearing life auxiliary test device.
Background
Along with the continuous improvement of the performance of motor products, the reliability of the motor products is more and more widely concerned; bearing life is however closely related to the reliability of the motor product. The bearing must operate reliably at the required speed in a confined small space, ensuring its highest load capacity and longest service life. In 1973, a general international rated dynamic load method for calculating the service life and reliability of a bearing is introduced in China, but the method is specified in the national standard GB6391 and is calculated by the number of working revolutions completed before fatigue spalling occurs on the working surface of the bearing or the number of working hours at a certain rotating speed; the test period is long, and the problem that the use reliability of the product is lack of effective control exists.
With the continuous improvement of product requirements, the performance requirements of the motor product at present are embodied by taking a decibel value as a judgment standard, wherein the decibel value is a noise value and is not related to the existing standard and is improved according to control; if the motor product is applied to the air conditioner industry standard field, the product decibel value is finally used as the reliability evaluation basis of the product.
But the service life standard of the motor products in the market is subjectively judged according to the decibel value of the artificial ears; the lack of quantitative decibel value as a basis for determination is supported.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defect that prior art exists, providing a bearing life auxiliary test device, this bearing life auxiliary test device can be used to the bearing life decibel value that the test motor used, and then realizes effectively evaluating the reliability of motor product in advance fast.
In order to achieve the above purpose, the utility model adopts the following scheme:
an auxiliary bearing life testing device, comprising:
a test spindle rotatable from the axis;
the bearing fixing device is sleeved on the test rotating shaft, is used for locking and fixing the test bearing on the test rotating shaft, and synchronously rotates with the test bearing along with the test rotating shaft;
and the radial force adjusting assembly coats the bearing fixing device, the test bearing and the test rotating shaft, is attached to the outer side of the test bearing, and is attached to the bearing fixing device to adjust the radial load force of the test bearing.
Further, the radial load force of the radial force adjusting assembly on the test bearing meets the following conditions:
wherein: n is the bearing speed, unit: rpm; c is radial dynamic load, unit: n; p is the equivalent load, unit: n; ε is the lifetime index; l is10hFor basic rated life, unit: and (4) hours.
Further, the radial force adjustment assembly comprises:
the end bushing covers the bearing fixing device, the test bearing and the test rotating shaft and is attached to the outer side of the test bearing so as to adjust the radial load force of the test rotating shaft;
and the end load body is attached to the outer side of the end bushing and is attached to the bearing fixing device so as to adjust the radial load force of the test bearing.
Furthermore, the bearing fixing device comprises a disassembling ring, an isolating sleeve and a nut which are sequentially sleeved on the test rotating shaft;
the nut is jointed and connected with the end load body;
the test bearing sleeve is positioned between the isolation sleeve and the nut;
the disassembling ring, the isolating sleeve and the nut are combined to be used for locking and fixing the test bearing on the test rotating shaft.
Furthermore, a positioning groove matched with the nut is arranged on the inner wall of the end load body; the nut is embedded in the positioning groove and attached to the groove wall of the positioning groove, and the groove wall of the positioning groove rotates synchronously with the test rotating shaft.
Further, still include:
and the temperature sensing probe penetrates through the radial force adjusting assembly and is close to the test bearing so as to be used for monitoring the temperature of the test bearing in the test process.
Further, the bearing fixing devices are 2, and the 2 bearing fixing devices are respectively located at the front end and the rear end of the radial force adjusting assembly.
Further, the bearing fixing device has 1, and 1 bearing fixing device is located at the front end or the rear end of the radial force adjusting assembly.
Furthermore, the end bushing comprises an end bushing clamping part which is clamped and tightly attached to the radial end face of the test bearing.
Compared with the prior art, the utility model has the advantages of as follows:
1. the utility model discloses a bearing life auxiliary test device is fixed in experimental pivot through bearing fixing device with experimental bearing locking, through the radial load power of radial force adjustment subassembly adjustment experimental bearing, carries out rotation test to experimental bearing, after rotation test, carries out decibel value survey through the experimental bearing after the pairing rotation test, and the decibel value of rethread test back survey carries out the grade assessment to experimental bearing and distinguishes, reaches the demand application to the product and carries out effective control.
2. The utility model discloses a bearing life auxiliary test device's supplementary bearing life method of calculating is through making bearing life auxiliary test device, combines the principle of bearing life auxiliary test device, carries out the quick test evaluation to the bearing product of different specifications, through the appropriate regulation to rotational speed and radial load, can accomplish the batch reliability evaluation of product in short time, and is identical with product actual demand application; promotes the establishment of a new method and standard for perfecting the bearing life system.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the bearing life auxiliary testing device of the present invention.
Fig. 2 is a schematic flow chart of the method for measuring and calculating the bearing life in the auxiliary testing device for the bearing life of the present invention.
The figure includes:
the test device comprises a test rotating shaft 1, a bearing fixing device 2, a dismounting ring 21, an isolation sleeve 22, a nut 23, a radial force adjusting component 3, an end bushing 31, an end bushing clamping part 311, an end load body 32, a positioning groove 321, a test bearing 4 and a temperature sensing probe 5.
Detailed Description
The invention will be further described with reference to the following examples.
Referring to fig. 1, an auxiliary bearing life testing device includes a testing rotating shaft 1, a bearing fixing device 2 and a radial force adjusting assembly 3. Wherein, the test rotating shaft 1 can rotate from the shaft; the bearing fixing device 2 is sleeved on the test rotating shaft 1, is used for locking and fixing the test bearing on the test rotating shaft 1, and rotates synchronously with the test bearing 4 along with the test rotating shaft 1; radial force adjustment subassembly 3 cladding bearing fixing device 2, experimental bearing 4 and experimental pivot 1 and with the laminating of the outside of experimental bearing 4 mutually, and with bearing fixing device 2 is laminated mutually and is connected in order to adjust the radial load power of experimental bearing 4. This bearing life auxiliary test device passes through bearing fixing device 2 and is fixed in on experimental pivot 1 with experimental bearing 4 locking, adjust the radial load power of experimental bearing 4 through radial force adjusting part 3, carry out the rotation test to experimental bearing 4, after the rotation test, carry out decibel value survey through experimental bearing 4 after the rotation test, the decibel value that rethread was surveyed carries out the grade evaluation to experimental bearing 4 and distinguishes, reach and carry out effective control to the demand application of product, be convenient for promote perfect bearing life system's new method and standard establishment.
The radial load force of the radial force adjusting assembly 3 on the test bearing 4 meets the following conditions:
wherein: n is the bearing speed, unit: rpm; c is radial dynamic load, unit: n; p is the equivalent load, unit: n; ε is the life index (different bearing types have different indices, such as ball bearing life index of 3; roller bearing life index of 3.33); l is10hFor basic rated life, unit: and (4) hours.
This formula
The derivation process is as follows:
according to the continuous improvement requirement of product performance, the service life method and the standard of the motor bearing are established through theoretical calculation and practical combination. The implementation principle is that a calculation formula is derived through theory as follows:
wherein: c is the radial dynamic load (N), P is the equivalent load (N), L10At the base rated life (million revolutions).
After the specification of the bearing is determined, the corresponding bearing parameter is determined to be a fixed value, and only the load condition is a variable, namely P and n are variables.
Wherein f isnFor the velocity coefficient, the derivation is as follows:
wherein f ishIn order to be a life factor of the battery,the derivation is as follows:
the relationship between the rotating speed n and the speed coefficient and the relationship between the basic rated service life and the service life coefficient are deduced as follows:
wherein: converting the number of revolutions into time to convert the number of revolutions into L of millions10Conversion to L in million hours10h(ii) a By
By passing
Derived out of
Thus, according to L10Basic rated life, fnIs a velocity coefficient, fhObtaining a structural principle device rotating speed constant condition formula for a life coefficient, a rotating speed n and a speed coefficient
The device is obtained by calculating a theoretical formula of a structural principle device rotating speed constant condition formula: the reliability evaluation of the product can be realized by improving the proper rotating speed and the proper radial load, the grade evaluation and the differentiation of the product can be carried out according to the decibel value after the test, and the effective control on the demand application of the product can be realized.
The radial force adjustment assembly 3 comprises an end bushing 31 and an end load body 32. The end bushing 32 covers the bearing fixing device 2, the test bearing 4 and the test rotating shaft 1 and is attached to the outer side of the test bearing 4 to adjust the radial load force of the test rotating shaft 1; the end load body 32 is attached to the outer side of the end bushing 31 and attached to the bearing fixing device 2 to adjust the radial load force of the test bearing 4. By setting the position relations between the end bushing 32 and the end load body 32 and the test bearing 4 and the bearing fixing device 2 respectively, the radial load force of the test bearing 4 can be effectively adjusted, the test bearing 4 is subjected to a rotation test, after the rotation test, the decibel value of the test bearing 4 after the rotation test is carried out, and then the class evaluation and differentiation are carried out on the test bearing 4 through the decibel value measured after the rotation test, so that the requirement application of a product is effectively controlled, and the new method and the standard establishment of a bearing service life system are facilitated to be improved.
Preferably, the end bushing includes an end bushing engaging portion that engages and abuts against a radial end surface of the test bearing. The end lining clamping part is tightly clamped and attached to the radial end face of the test bearing, so that the radial load force of the test bearing is effectively adjusted.
In this embodiment, the bearing fixing device 2 includes a detaching ring 21, an isolating sleeve 22 and a nut 23, which are sequentially sleeved on the test rotating shaft 4; the nut 23 is attached to the end load body 32; the test bearing sleeve 4 is positioned between the isolation sleeve 22 and the nut 23; the test bearing 4 is locked and fixed on the test rotating shaft 1 through the combined action of the dismounting ring 21, the isolation sleeve 22 and the nut 23. Realize fixed to the locking of experimental bearing 4 through dismantling ring 21, spacer 22 and nut 23 combined action, simultaneously through nut 23 with the end load body 32 is laminated mutually and is connected, can adjust experimental bearing 4's radial loading power effectively, carries out the rotation test to experimental bearing 4, and after the rotation test, be convenient for carry out decibel value survey to experimental bearing 4 after the rotation test.
In order to improve the stable fit between the bearing fixing device 2 and the end load body 32 and facilitate the effective adjustment of the radial load force of the test bearing 4, a positioning groove 321 matched with the nut 23 is arranged on the inner wall of the end load body 32; the nut 23 is embedded in the positioning groove 321 and attached to the groove wall of the positioning groove 321 to rotate synchronously with the test rotating shaft 4.
The bearing life auxiliary test device also comprises a temperature sensing probe 5. The temperature sensing probe 5 passes through the radial force adjusting assembly 3 and is close to the test bearing 4 so as to monitor the temperature of the test bearing 4 in the test process. By making close contact with the test bearing 4, it is helpful to quickly monitor the temperature of the test bearing during the test. The temperature sensing probe 5 is a temperature sensor probe.
In this embodiment, the number of the bearing fixing devices 2 is 2, and 2 bearing fixing devices 2 are respectively located at the front end and the rear end of the radial force adjusting assembly 3. Through set up 2 bearing fixing device 2 on experimental pivot 1, then can carry out the rotation test to two experimental bearings 4 simultaneously, after the rotation test, be convenient for carry out multiunit decibel value survey to the experimental bearing 4 after the rotation test, realize multiunit data measurement, reduce repetitious rotation test work, improve work efficiency, be convenient for carry out the grade assessment to experimental bearing fast and distinguish.
During assembly, firstly, a disassembly ring 21 is installed on the test rotating shaft 1 for locking, and an isolation sleeve 22 is sleeved on the test rotating shaft; the device is used for facilitating disassembly after the test is finished. Then, mounting the test bearing 4 and locking nuts 23 at two ends; the device is used for adjusting the end surface reference symmetrical plane of the test bearing 4 and preventing the test result from being judged by the abnormal condition such as deviation in the test process. Then, installing and locking an end bushing 31, and sleeving an upper end load body 32; the device is used for adjusting the radial force of the test bearing 4, and the proper end bushing 31 and the end load body 32 are selected according to the size of the outer diameter specification of the actual bearing sample 4 by adjusting the strength of the radial force. And finally, a temperature sensing probe 5 is installed for monitoring the temperature in the test process.
In another embodiment, the number of the bearing fixing devices 2 is 1, and 1 of the bearing fixing devices 2 is located in the middle of the radial force adjusting assembly 3. By carrying out a rotation test on one test bearing 4, after the rotation test, carrying out decibel value measurement on the test bearing 4 after the rotation test, and then carrying out grade evaluation and differentiation on the test bearing 4 through the decibel value measured after the test, the requirement application of a product is effectively controlled, and the establishment of a new method and a standard for perfecting a bearing service life system is facilitated.
Referring to fig. 2, a method for auxiliary measuring and calculating the bearing life by using the above-mentioned device for auxiliary testing of the bearing life includes the following steps:
a. selecting a test bearing 4;
b. the device rotating speed constant condition formula is as follows according to the structure principle:
determining the values of n bearing rotating speed, P equivalent load, epsilon life index and L10h basic rated life according to the parameters of the standard component of the test bearing, and calculating the value of C radial dynamic load;
c. manufacturing a radial force adjusting assembly 3 which satisfies the radial load force of the test bearing with the value of the radial dynamic load C according to the value of the radial dynamic load C;
d. manufacturing a bearing service life auxiliary testing device according to the standard part of the test bearing 4 and the radial force adjusting assembly 3;
e. measuring decibel value of the test bearing 4, and recording data X;
f. setting the rotating speed, radial dynamic load and time of the bearing life auxiliary testing device, and carrying out rotation test on a test bearing by using the bearing life auxiliary testing device;
g. measuring the decibel value of the test bearing 4 after the rotation test, and recording data Y;
h. judging the data X and the data Y according to the standard range of the national standard GB6391 to obtain the grade evaluation result of the test bearing 4;
i. based on the rating evaluation results, the life value of the test bearing 4 was evaluated.
Table 1: and (3) measuring decibel values obtained by testing the test bearings 4 with different specifications by using the method for measuring the service life of the bearing with the aid of the auxiliary bearing service life testing device.
In table 1, the sample numbers correspond to the test bearings 4 of different specifications, the test conditions of the bearing life auxiliary test device are limited, specifically, the rotating speed, the radial dynamic load and the time are respectively, so that noise values before and after the test, namely decibel values, are obtained, and through various groups of data, the method for auxiliary measuring and calculating the bearing life of the bearing life auxiliary test device can be obtained; promotes the establishment of a new method and standard for perfecting the bearing life system.
In this embodiment, this application utility model's scheme not only is used in the bearing that the motor was used, and the bearing product that the rotating part that corresponds in some utensil implementation mode relates to all also can promote the use and carry out evaluation control, ensures that the reliability of product verifies the aassessment in advance, guarantees that product marketization quality demand and promotion bearing product life system are perfect.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a bearing life auxiliary test device which characterized in that includes:
a test spindle rotatable from the axis;
the bearing fixing device is sleeved on the test rotating shaft, is used for locking and fixing the test bearing on the test rotating shaft, and synchronously rotates with the test bearing along with the test rotating shaft;
and the radial force adjusting assembly coats the bearing fixing device, the test bearing and the test rotating shaft, is attached to the outer side of the test bearing, and is attached to the bearing fixing device to adjust the radial load force of the test bearing.
2. The auxiliary bearing life testing device according to claim 1, wherein the radial load force of the radial force adjusting assembly on the test bearing satisfies the following condition:
wherein: n is the bearing speed, unit: rpm; c is radial dynamic load, unit: n; p is the equivalent load, unit: n; ε is the lifetime index; l is10hFor basic rated life, unit: and (4) hours.
3. The bearing life auxiliary testing device of claim 1 or 2, wherein the radial force adjustment assembly comprises:
the end bushing covers the bearing fixing device, the test bearing and the test rotating shaft and is attached to the outer side of the test bearing so as to adjust the radial load force of the test rotating shaft;
and the end load body is attached to the outer side of the end bushing and is attached to the bearing fixing device so as to adjust the radial load force of the test bearing.
4. The auxiliary bearing life testing device according to claim 3,
the bearing fixing device comprises a disassembling ring, an isolating sleeve and a nut which are sleeved on the test rotating shaft in sequence;
the nut is jointed and connected with the end load body;
the test bearing sleeve is positioned between the isolation sleeve and the nut;
the disassembling ring, the isolating sleeve and the nut are combined to be used for locking and fixing the test bearing on the test rotating shaft.
5. The auxiliary bearing life testing device according to claim 4, wherein a positioning groove matched with the nut is formed on the inner wall of the end load body; the nut is embedded in the positioning groove and attached to the groove wall of the positioning groove, and the groove wall of the positioning groove rotates synchronously with the test rotating shaft.
6. The bearing life auxiliary test apparatus according to claim 1 or 2, further comprising:
and the temperature sensing probe penetrates through the radial force adjusting assembly and is close to the test bearing so as to be used for monitoring the temperature of the test bearing in the test process.
7. The auxiliary bearing life testing device according to claim 1 or 2, wherein the number of the bearing fixing devices is 2, and 2 bearing fixing devices are respectively located at the front end and the rear end of the radial force adjusting assembly.
8. The bearing life auxiliary testing device according to claim 1 or 2, wherein the number of the bearing fixing devices is 1, and 1 of the bearing fixing devices is located in the middle of the radial force adjusting assembly.
9. The auxiliary bearing life testing device of claim 3, wherein the end bushing comprises an end bushing clamping portion which is clamped and attached to a radial end face of the test bearing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921285620.9U CN210719705U (en) | 2019-08-08 | 2019-08-08 | Bearing life auxiliary testing device |
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| CN201921285620.9U CN210719705U (en) | 2019-08-08 | 2019-08-08 | Bearing life auxiliary testing device |
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| CN210719705U true CN210719705U (en) | 2020-06-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455538A (en) * | 2019-08-08 | 2019-11-15 | 珠海凯邦电机制造有限公司 | A kind of bearing life auxiliary test unit and its auxiliary measuring and calculating bearing life method |
| CN114112891A (en) * | 2021-12-07 | 2022-03-01 | 北京科技大学 | High-temperature high-pressure water environment rotating electrode structure material testing machine |
-
2019
- 2019-08-08 CN CN201921285620.9U patent/CN210719705U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455538A (en) * | 2019-08-08 | 2019-11-15 | 珠海凯邦电机制造有限公司 | A kind of bearing life auxiliary test unit and its auxiliary measuring and calculating bearing life method |
| CN114112891A (en) * | 2021-12-07 | 2022-03-01 | 北京科技大学 | High-temperature high-pressure water environment rotating electrode structure material testing machine |
| CN114112891B (en) * | 2021-12-07 | 2024-01-12 | 北京科技大学 | High-temperature high-pressure water environment rotary electrode structural material testing machine |
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