基于摩擦温升校验的往复泵密封件设计

为了避免中高压往复泵的密封件因摩擦温升而快速磨损或破坏,在选择和设计往复泵密封件时要对其摩擦温升进行分析计算,保证摩擦面最高温度不超过密封材料的许用温度.摩擦面最高温度主要由环境温度、摩擦接触体温升、摩擦面温升3个因素决定.考虑以上因素,推导了往复泵接触体温升计算公式,并在经典摩擦面温升解析计算公式的基础上,提出了1种基于摩擦面温升的往复泵密封件设计校验简洁公式.通过与试验结果对比,验证了校验式的适用性.研究结果从摩擦温升角度为往复运动密封件的选择与设计提供了参考.

Reciprocating pump seals design based on frictional temperature verification

To avoid the seals failure due to the increasing temperature caused by the friction motion in medium or high pressure reciprocating pump, it is necessary to consider the frictional temperature in the design of seals to ensure that the highest temperature on the friction interface is not greater than the allowable temperature of seal material. The maximum temperature on the interface by the friction motion is mainly influenced by the surrounding temperature, the frictional temperature of contact body, and the frictional temperature rise on the interface between contact bodies. The formula of frictional seals′ temperature for reciprocating pump is derived. And a concise formula of the increasing temperature on the frictional interface is proposed for designing and checking the seals for the reciprocating pump, which is based on the classical analytic computational formula of friction surface temperature. The feasibility of the proposed concise formula is validated by the comparison of calculation and experimental results. Results in present work would provide the reference for choosing and designing of seals in reciprocating motion from the view of the frictional temperature. 