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| Application of hydraulic damping governor in rapid winchhoist |
(1.Jiangsu Surveying and Design Institute of Water Resources Co.， Ltd., Yangzhou， Jiangsu 225009， China; 2.Jiangsu Water Conservancy Machinery Co.， Ltd., Yangzhou， Jiangsu 225003， China) |
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Abstract In order to solve repeated oscillations, heating and burning of friction plates in the operation of centrifugal governor, applying the speed control principle of hydraulic hoist to rapid winchhoist, hydraulic damping governor is adopted to improve the winchhoist governor. In this paper, the speed control principle of damping governor is expounded; and a fluid mechanics model of governor is established; flow and damping moment calculation formulae are deduced. The experiment results of QPK-2×160 kN type rapid winchhoists, equipped with two different governors, were analyzed. The results show that fluid control is mainly related to the diameter of the damper; the damping moment is inversely proportional to the square of the damper area; the damping moment increases as the angular speed of the damper increases. The hydraulic damping governor has a good damping characteristics, which can absorb load vibration, impact, reduce moment and reduce time and range of the speed surging. Only moment balance can be achieved after 2-3 oscillation absorptions. The results also show that hydraulic damper governor can prevent equipment resonance, improve system smoothness and stability, enhance the hoist reliability of winchhoist system, make gate descend at an even speed and prolong its service life, thus extend the application scope of rapid winchhoist．
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Received: 12 September 2012
Published: 25 June 2013
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