美國凱斯西儲大學(xué)軸承數(shù)據(jù)說明

1、一、Apparatus & Procedures（實驗與采集裝置）As shown in Figure 1 above, the test stand consists of a 2 hp motor (left), a torque transducer/encoder (center), a dynamometer (right), and control electronics (not shown). The test bearings support the motor shaft. Single point faults were introduced to the tes

2、t bearings using electro-discharge machining with fault diameters of 7 mils, 14 mils, 21 mils, 28 mils, and 40 mils (1 mil=0.001 inches). See FAULT SPECIFICATIONS for fault depths. SKF bearings were used for the 7, 14 and 21 mils diameter faults, and NTN equivalent bearings were used for the 28 mil

3、and 40 mil faults. Drive end and fan end bearing specifications, including bearing geometry and defect frequencies are listed in the BEARING SPECIFICATIONS.（如圖所示，實驗平臺包括一個2馬力的電機（左側(cè)）（1hp=746W），一個轉(zhuǎn)矩傳感器（中間），一個功率計（右側(cè)）和電子控制設(shè)備（沒有顯示）。被測試軸承支承電機軸。使用電火花加工技術(shù)在軸承上布置了單點故障，故障直徑分別為0.007、0.014、0.021、0.028、0.040英寸（1英寸

4、=2.54厘米）。其中前三種故障直徑的軸承使用的是SKF軸承，后兩種故障直徑的軸承使用的是與之等效的NTN軸承。Vibration data was collected using accelerometers, which were attached to the housing with magnetic bases. Accelerometers were placed at the 12 o?clock position at both the drive end and fan end of the motor housing. During some experiments, an

5、 accelerometer was attached to the motor supporting base plate as well. Vibration signals were collected using a 16 channel DAT recorder, and were post processed in a Matlab environment. All data files are in Matlab (*.mat) format. Digital data was collected at 12,000 samples per second, and data wa

6、s also collected at 48,000 samples per second for drive end bearing faults. Speed and horsepower data were collected using the torque transducer/encoder and were recorded by hand.（實驗中使用加速度傳感器采集振動信號，通過使用磁性底座將傳感器安放在電機殼體上。加速度傳感器分別安裝在電機殼體的驅(qū)動端和風(fēng)扇端12點鐘的位置。在有些實驗中，傳感器也被安放在電機支承底盤上。振動信號是通過16通道的DAT記錄器采集的，并且后期在

7、MATLAB環(huán)境中處理。數(shù)字信號的采樣頻率為12000S/s，驅(qū)動端軸承故障數(shù)據(jù)同時也以48000S/s的采樣速率采集。Outer raceway faults are stationary faults, therefore placement of the fault relative to the load zone of the bearing has a direct impact on the vibration response of the motor/bearing system. In order to quantify this effect, experiments w

8、ere conducted for both fan and drive end bearings with outer raceway faults located at 3 o?clock (directly in the load zone), at 6 o?clock (orthogonal to the load zone), and at 12 o?clock（外圈的故障是固定不變的，因此故障相對于軸承受載區(qū)域的位置對電機/軸承系統(tǒng)的振動響應(yīng)由直接的影響。為了對這個影響進行定量研究，實驗中分別對驅(qū)動和風(fēng)扇端的軸承外圈布置3點鐘、6點鐘、12點鐘方向的故障。二、Download A

9、Data FileData was collected for normal bearings, single-point drive end and fan end defects.  Data was collected at 12,000 samples/second and at 48,000 samples/second for drive end bearing experiments.  All fan end bearing data was collected at 12,000 samples/second.  Data files

10、are in Matlab format.  Each file contains fan and drive end vibration data as well as motor rotational speed.  For all files, the following item in the variable name indicates:DE - drive end accelerometer dataFE - fan end accelerometer dataBA - base accelerometer datatime - time series dat

11、aRPM- rpm during testing Download: Normal Baseline DataMotor Load (HP)Approx. Motor Speed (rpm)Normal Baseline Data01797971177298217509931730100Download: 12k Drive End Bearing Fault Data* = Data not availableFault DiameterMotor Load (HP)Approx. Motor Speed (rpm)Inner RaceBallOuter Race Position

12、 Relative to Load Zone (Load Zone Centered at 6:00)     Centered6:00Orthogonal3:00Opposite12:000.007"01797105118130144156 11772106119131145158 21750107120132146159 317301081211331471600.014"01797169185197* 11772170186198* 21750171187199*

13、60;31730172188200*0.021"01797209222234246258 11772210223235247259 21750211224236248260 317302122252372492610.028"0179730013005* 1177230023006* 2175030033007* 3173030043008*Download: 48k Drive End Bearing Fault Data* = Data not availableFault DiameterMotor Load

14、 (HP)Approx. Motor Speed (rpm)Inner RaceBallOuter Race Position Relative to Load Zone (Load Zone Centered at 6:00)     Centered6:00Orthogonal3:00Opposite12:000.007"01797109122135148161 11772110123136149162 21750111124137150163 317301121251381511640.0

15、14"01797174189201* 11772175190202* 21750176191203* 31730177192204*0.021"01797213226238250262 11772214227239251263 21750215228240252264 31730217229241253265Download: 12k Fan End Bearing Fault Data* = Data not availableFault DiameterMotor Load (HP)Approx. Motor

16、Speed (rpm)Inner RaceBallOuter Race Position Relative to Load Zone (Load Zone Centered at 6:00)     Centered6:00Orthogonal3:00Opposite12:000.007"01797278282294298302 11772279283295299305 21750280284296300306 317302812852973013070.014"01797274286

17、313310* 11772275287*309* 21750276288*311* 31730277289*312*0.021"01797270290315* 11772271291*316* 21750272292*317* 31730273293*318*（Fault Specifications故障規(guī)格   (All dimension尺寸 in inches)BearingFault LocationDiameterDepthBearing ManufacturerDrive EndInner R

18、aceway.007.011SKFDrive EndInner Raceway.014.011SKFDrive EndInner Raceway.021.011SKFDrive EndInner Raceway.028.050NTNDrive EndOuter Raceway.007.011SKFDrive EndOuter Raceway.014.011SKFDrive EndOuter Raceway.021.011SKFDrive EndOuter Raceway.040.050NTNDrive EndBall.007.011SKFDrive EndBall.014.011SKFDriv

19、e EndBall.021.011SKFDrive EndBall.028.150NTNFan EndInner Raceway.007.011SKFFan EndInner Raceway.014.011SKFFan EndInner Raceway.021.011SKFFan EndOuter Raceway.007.011SKFFan EndOuter Raceway.014.011SKFFan EndOuter Raceway.021.011SKFFan EndBall.007.011SKFFan EndBall.014.011SKFFan EndBall.021.011SKFBearing information軸承信息：Drive end bearing驅(qū)動端軸承: 6205-2RS JEM SKF, deep groove ball bea