CN101403652A - Method for judging exception sound of bearing - Google Patents
Method for judging exception sound of bearing Download PDFInfo
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- CN101403652A CN101403652A CNA2008102308401A CN200810230840A CN101403652A CN 101403652 A CN101403652 A CN 101403652A CN A2008102308401 A CNA2008102308401 A CN A2008102308401A CN 200810230840 A CN200810230840 A CN 200810230840A CN 101403652 A CN101403652 A CN 101403652A
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Abstract
The invention discloses a method used for judging the abnormal noise of bearing. The method is characterized in that the method is as follows: 1) a bearing vibration acceleration crest factor meter is adopted as a test meter; 2) a sample to be tested is adopted to measure the acceleration crest factor and the maximum value among the test values of at least three equal points on the front / back faces of the bearing is adopted; and 3) when the crest factor of the bearing is less than or equal to 9 the abnormal noise in bearing can be excluded. The invention can be used for the quantitative assessment of the abnormal noise of the deep groove ball bearing so as to enhance the distinguishing rate whiling judging the abnormal noise of bearing.
Description
Technical field
The present invention relates to bearing detection technique field, especially a kind of method of judging exception sound of bearing.
Background technology
Deep groove ball bearing is a class bearing that is most widely used at present, and along with development of science and technology, some precision optical machineries, high-grade household electrical appliances, business automation equipment have proposed more strict requirement to the vibration and the noise of deep groove ball bearing.These products not only require bearing vibration low, and tonequality is good, and require bearing to have certain vibration life and noise life-span.The abnormal sound of deep groove ball bearing is one of important performance indexes of deep groove ball bearing, present domestic bearing industry adopts the artificial abnormal sound of monitoring, measuring bearing with vibration for methods such as noise measurement, vibration signal waveforms demonstrations mostly, though these methods have certain validity, but be difficult to the abnormal sound of deep groove ball bearing is carried out quantization assessment in concrete the application, False Rate is higher.
Summary of the invention
The purpose of this invention is to provide a kind of method of judging exception sound of bearing, can solve the quantization assessment of deep groove ball bearing abnormal sound, improve the differentiation rate that exception sound of bearing is measured.
Technical scheme of the present invention is: described a kind of method of judging exception sound of bearing, and it is characterized in that: this decision method is as follows:
1), determines testing tool: select bearing vibration acceleration crest factor measurement instrument;
2), content measurement: the abnormal sound of vibration acceleration crest factor, monitoring bearing;
Adopt during test bearing just/value after uniform 3 the tests of reverse side gets maximal value;
3), statistical test amount result
Add up no abnormal sounding point and the frequency and the cumulative frequency of abnormal sound measuring point crest factor are arranged; Effectively differentiation rate of statistics exception sound of bearing, the computing formula of effectively differentiation rate R: R=R1-R2, in the formula: R1 represents the no abnormal sound of bearing differentiation rate, and R2 represents that bearing has the differentiation rate of abnormal sound;
4) determine best effectively differentiation rate
Determine best effectively differentiation rate R according to crest factor
Max
By crest factor≤9 of described decision method test 0,2,3 serial bearings o'clock, resulting effective differentiation rate be the best.
The present invention adopts the vibration acceleration crest factor as the assessment parameters of measuring exception sound of bearing, on the basis of substantive test, by ASSOCIATE STATISTICS analysis to exception sound of bearing and bear vibration acceleration crest factor, establish the rule of judging exception sound of bearing with the vibration acceleration crest factor, realized measurement and probabilistic evaluation, the detection and the evaluation of standard deep groove ball bearing abnormal sound had significant values the abnormal sound of deep groove ball bearing.
China is Production of bearing big country, and there are thousands of families in the enterprise that produces deep groove ball bearing, produces output tens covers of deep groove ball bearing per year, wherein has 80% bearing need carry out the detection of abnormal sound approximately.Judge that with the vibration acceleration crest factor exception sound of bearing method has changed traditional deep groove ball bearing abnormal sound decision method, get rid of the influence that human factor and measurement itself produce, can effectively and judge exception sound of bearing quantitatively, effectively the differentiation rate reaches about 90%, from the statistical significance, solved the gordian technique of the measurement and the evaluation of exception sound of bearing, this is to the measurement of the domestic low noise deep groove ball bearing of standard abnormal sound, and the class and the level that improve homemade bearing have important Practical significance and promotional value.
Embodiment
The present invention is an example with 0,2,3 serial bearings, and the decision method of employing is as follows:
1, determines testing tool
Because testing tool is bigger to the test result influence, consider the versatility and the reliability of instrument, test adopts the S092 profile shaft of this Research Institute to hold vibration (different sound) measuring instrument.The key technical indexes of instrument is as follows:
1). test physical quantity: vibration acceleration level, vibration acceleration crest factor, umber of pulse
2). vibration acceleration level scale range: 0～85dB is divided into fourth gear, 0～25dB, 20～45dB, 40～65dB, 60～85dB
3). frequency range: 100Hz～10KHz
4). the electronic box measuring error :≤± 1dB
2, choose the bearing sample
The bearing sample is mainly chosen the bearing products that some representative enterprises of home and overseas are produced.Chosen the new product of producer such as Bearing Factory, Wuxi Yanwei Precision Bearing Factory greatly of Renben Co., Ltd., Jiangmen plant equipment (bearing) company limited, CiXing Group Co.,Ltd, Zhejiang Cixi as domestic sample, external sample has been chosen the bearing products of NSK, NTN, NMB company.Sample mainly is the miniature deep groove ball bearing and the middle-size and small-size deep groove ball bearing of 0,2,3 series.For the more effective comparative analysis of carrying out crest factor, domestic sample is big by low noise, vibration values, have four kinds of different class of abnormal sound and common product to choose, and external sample is chosen by low noise and common product.Domestic sample bearing 1568 covers, external sample bearing 431 covers, total sample size 1999 cover bearings.
3, test by content measurement
By the class interval set the vibration acceleration crest factor, the content measurement of monitoring the abnormal sound of bearing tests, adopt during test bearing just/value after uniform 3 the tests of reverse side gets maximal value.Every Measuring Time generally was about about 5 seconds.
4, checking, analysis
Validity to crest factor and exception sound of bearing detection is verified; Relation to crest factor and exception sound of bearing is carried out statistical study, proposes the quantified controlling index of crest factor.
5, statistical test result
The test result statistics has following content:
1). no abnormal sounding point and the frequency of abnormal sound measuring point crest factor is arranged and the cumulative frequency statistics shown in table 1, table 2;
2). effectively differentiation rate of exception sound of bearing statistics is as shown in table 3 both at home and abroad.
The cumulative frequency that no abnormal sounding point is corresponding in the table 1,2 is exactly the no abnormal sound of a bearing differentiation rate, represents with R1 at this; The cumulative frequency that abnormal sound measuring point correspondence is arranged is exactly the differentiation rate of exception sound of bearing, represents with R2 at this.To homologous series, the crest factor of identical class interval, in this class interval, effectively differentiation rate of exception sound of bearing R=R1-R2.
6, determine best effectively differentiation rate
Determine best effectively differentiation rate R according to the crest factor of homologous series, identical class interval
Max
As can be seen from Table 3, the crest factor of 0,2,3 serial bearings≤9 o'clock, resulting effective differentiation rate is best.
7, analysis and conclusion
1). according to the statistics of table 1 and table 2, no matter be state's inner bearing sample, still the no abnormal sounding point of state's outer bearing sample and have the crest factor difference of abnormal sound measuring point apparent in view, the abnormal sound of this explanation crest factor and bearing has stronger correlativity, and the enough crest factors of energy are judged the abnormal sound of bearing.
2). from the statistics of table 1 and table 2, both at home and abroad frequency, the cumulative frequency regularity of distribution basically identical of bearing crest factor, and the feature of following several respects is arranged:
(1) no abnormal sounding point with have the frequency of abnormal sound measuring point crest factor, the statistics of cumulative frequency that marked difference is arranged.The crest factor numerical value of no abnormal sounding point is less, and is relatively concentrated, mainly distributing below 10, and distribution center increases with the increase of bearing series.There is the crest factor numerical value of abnormal sound measuring point bigger, mainly distributing more than 10, and more discrete.
(2) cumulative frequency that no abnormal sounding point is corresponding in the table is exactly the no abnormal sound of a bearing differentiation rate, represents with R1 at this; The cumulative frequency that abnormal sound measuring point correspondence is arranged is exactly the differentiation rate of exception sound of bearing, represents with R2 at this.To homologous series, the crest factor of identical class interval, in this class interval, effectively differentiation rate of exception sound of bearing R=R1-R2, best effectively differentiation rate=R
MaxAs can be seen from Table 3, the crest factor of 0,2,3 serial bearings≤9 o'clock, resulting effective differentiation rate is best.
3). the distinguishing rule to different series and types of bearings should be differentiated.For reducing False Rate, improve differentiate efficient, following recommendation judgment basis is proposed
(1) 0,2,3 serial bearings, crest factor≤9, effectively judgement rate reaches 90% respectively, more than 93%, 88%;
(2) bearing of other series or type can be judged with reference to this method.Because crest factor is directly related with measuring method, so enterprise adjusts accordingly to decision principle as the case may be.
Claims (2)
1, a kind of method of judging exception sound of bearing is characterized in that, this decision method is as follows:
1), select bearing vibration acceleration crest factor measurement instrument as tester;
2), get the moving acceleration crest factor of measured bearing sample test vibration measuring;
3), crest factor≤9 of bearing o'clock, judge the no abnormal sound of bearing.
2, the method for judgement exception sound of bearing according to claim 1 is characterized in that, adopt during test vibration acceleration crest factor bearing just/value after uniform 3 tests of reverse side gets maximal value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102308401A CN101403652A (en) | 2008-11-12 | 2008-11-12 | Method for judging exception sound of bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102308401A CN101403652A (en) | 2008-11-12 | 2008-11-12 | Method for judging exception sound of bearing |
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| Publication Number | Publication Date |
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| CN101403652A true CN101403652A (en) | 2009-04-08 |
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| CNA2008102308401A Pending CN101403652A (en) | 2008-11-12 | 2008-11-12 | Method for judging exception sound of bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243143A (en) * | 2011-04-20 | 2011-11-16 | 上海斐赛轴承科技有限公司 | Bearing abnormal sound detection control method and bearing vibration measuring instrument |
| CN103033257A (en) * | 2012-12-13 | 2013-04-10 | 青岛泰德汽车轴承有限责任公司 | Measuring method for vibration state of antifriction bearing |
-
2008
- 2008-11-12 CN CNA2008102308401A patent/CN101403652A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243143A (en) * | 2011-04-20 | 2011-11-16 | 上海斐赛轴承科技有限公司 | Bearing abnormal sound detection control method and bearing vibration measuring instrument |
| CN102243143B (en) * | 2011-04-20 | 2014-04-30 | 上海斐赛轴承科技有限公司 | Bearing abnormal sound detection control method and bearing vibration measuring instrument |
| CN103033257A (en) * | 2012-12-13 | 2013-04-10 | 青岛泰德汽车轴承有限责任公司 | Measuring method for vibration state of antifriction bearing |
| CN103033257B (en) * | 2012-12-13 | 2015-06-03 | 青岛泰德汽车轴承股份有限公司 | Measuring method for vibration state of antifriction bearing |
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Open date: 20090408 |