论文部分内容阅读
液压传动的可靠性和工作能力取决于液压传动系统所采用的液压元件技术性能和使用性能,以及液压传动的总体布置。多种液压传动的使用表明,液压元件的密封件密封性的减弱和运动件在工作负载作用下(特别是在重载条件下)的磨损是破坏其密封作用的主要原因。因此,应该在机械负载和热负载重复作用下进行液压件最大可靠性的寿命试验。通常,这些试验分段进行,其特点是按该元件标准负载曲线图重复进行试验。该图系在轴向柱塞泵寿命试验时假定的标准动载曲线的例子。在阶段范围内,周围介质温度T_0.c和工作液温度T_(p.ж)按给定的规律周期变化;泵出口压力P_(вых)呈阶跃变化,并且压力值的大小在给定的温度条件下为所对应的值,泵的加载时间和空载时间的关系可以变化。图解部分系
The reliability and workability of a hydraulic drive depend on the technical and performance characteristics of the hydraulic components used in the hydraulic drive system, as well as the overall layout of the hydraulic drive. The use of a variety of hydraulic drives shows that the reduction of seal tightness of the hydraulic components and the wear of the moving parts under the working load (especially under heavy load conditions) are the main reasons that undermine the sealing effect. Therefore, the maximum reliability life test of hydraulic components should be carried out under the repeated action of mechanical load and thermal load. Usually, these tests are carried out in stages, and the characteristic is that the test is repeated according to the standard load curve of the component. This figure is an example of a standard dynamic load curve assumed during axial piston pump life testing. In the phase range, the surrounding medium temperature T_0.c and the working fluid temperature T_ (p.ж) change periodically with a given regularity; the pump outlet pressure P_ (вых) changes stepwise and the magnitude of the pressure value is within a given Temperature corresponds to the value of the pump load time and load time can vary. Part of the diagram