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液压系统的每一种无效形式都不可避免地转变成热能。每种对系统外界不做有用功的压力损失都会导致系统变热。这些现象包括(但不限于)以下一些。泵的效率低泵的总效率是指输入功率中传递到系统的那部分。100%和总效率之间的差额就是指诸如摩擦和空气阻力之类的机械损失以及由于涡流和泄漏所造成的液压损失。油的压缩性所有液压油都在一定程度上是可以压缩的。就象气体,例如空气,它们在受压时温度要上升(这就是柴油机点火的来源)洞理,当泵的系统压力增大时,液压油的温度将会升高。也许有人认为,这种温升可以通过液压油离开阀和执行机构后的膨胀而得到补偿。但是,这种压缩作用必须在温升的
Every ineffective form of the hydraulic system is inevitably converted into heat. Each type of pressure loss that does not make any significant difference to the outside of the system can cause the system to become hot. These phenomena include, but are not limited to, the following. Low pump efficiency The overall pump efficiency refers to the portion of the input power delivered to the system. The difference between 100% and total efficiency refers to mechanical losses such as friction and air drag and hydraulic losses due to eddy currents and leaks. Compressibility of the oil All hydraulic fluids are to some extent compressible. Like gases, such as air, they warmer when pressurized (the source of diesel ignition) and as the system pressure on the pump increases, the temperature of the hydraulic fluid will rise. Some people think that this temperature rise can be compensated by the expansion of hydraulic oil after leaving the valve and actuator. However, this compression must be warming