Vibration Characteristics of Gear Rattling under the Condition of Speed Increasing Transmission

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (7) : 76-80.

Gear rattling is the important symbol of complex dynamic characteristics under the condition of speed increasing transmission. Therefore, it is of great significance to carry on research on influence of internal and external incentives on rattling and to further elaborate rattling vibration characteristics. The speed increasing test-bed has been set up using photoelectric encoder and NI DAS to collect rotate speed pulses. Furthermore, gear rattling phenomenon has been verified by analyzing arc length difference and rotate speed difference of meshing gears. On this basis, a series of rattling experiments are conducted under different initial conditions such as different backlash values and different rotate speeds. As a result, envelope line of arc length difference has a trend of sine wave, and variation amplitude has a narrow trend with the speed increasing, and its central position is only related to gears’ initial position. Moreover, rattling position has the trend from meshing surface to opposite surface when rattling phenomenon appears. In addition, with the increase of backlash, the corresponding rattling threshold value reduces, namely, rattling phenomenon is easier to appear.

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Abstract

Gear rattling is the important symbol of complex dynamic characteristics under the condition of speed increasing transmission. Therefore, it is of great significance to carry on research on influence of internal and external incentives on rattling and to further elaborate rattling vibration characteristics. The speed increasing test-bed has been set up using photoelectric encoder and NI DAS to collect rotate speed pulses. Furthermore, gear rattling phenomenon has been verified by analyzing arc length difference and rotate speed difference of meshing gears. On this basis, a series of rattling experiments are conducted under different initial conditions such as different backlash values and different rotate speeds. As a result, envelope line of arc length difference has a trend of sine wave, and variation amplitude has a narrow trend with the speed increasing, and its central position is only related to gears’ initial position. Moreover, rattling position has the trend from meshing surface to opposite surface when rattling phenomenon appears. In addition, with the increase of backlash, the corresponding rattling threshold value reduces, namely, rattling phenomenon is easier to appear.

Key words

rattling / vibration characteristics / arc length difference / backlash / threshold value

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Shen Gang1 Xiang Dong1 Mou Peng1 Yang Wei2 Zhao Qiang2. Vibration Characteristics of Gear Rattling under the Condition of Speed Increasing Transmission[J]. Journal of Vibration and Shock, 2015, 34(7): 76-80

References

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