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How to avoid power loss of hydraulic system

Update:06-03-2020
Summary:

On the one hand, the power of the hydraulic system will […]

On the one hand, the power of the hydraulic system will cause the loss of energy and reduce the overall efficiency of the system. On the other hand, the lost energy will be converted into heat energy, which will increase the temperature of the hydraulic oil and deteriorate the oil, resulting in the failure of the hydraulic equipment. Therefore, in the design of the hydraulic system, on the premise of meeting the use requirements, we should also fully consider reducing the power loss of the system.
There are inevitably pressure loss and flow loss when the pressure oil flows through various hydraulic valves. This part of energy loss accounts for a large proportion of the total energy loss. Therefore, the hydraulic system should choose the hydraulic device reasonably, and adjusting the pressure of the pressure valve is also an important aspect of reducing the power loss.
In terms of power source, considering the diversity of actuator working conditions, sometimes the system needs large flow and low pressure; sometimes it needs small flow and high pressure. Therefore, it is better to choose the limited pressure variable pump, because the flow of this type of pump changes with the change of system pressure. This can not only meet the working requirements of the actuator, but also make the power consumption more reasonable.
The hydraulic oil should be selected reasonably in the hydraulic system. In addition, when the oil flows in the pipeline, there are pressure loss along the pipeline and local pressure loss, so the pipeline should be designed to shorten the pipeline as much as possible, while reducing the elbow. However, there are many factors that affect the power loss of the hydraulic system, so if we design a hydraulic system, we need to consider the requirements of other aspects.
If the actuator has the requirement of speed regulation, when selecting the speed regulation circuit, it should not only meet the requirement of speed regulation, but also reduce the power loss as much as possible. If we want to meet the two requirements at the same time, we can use the volume throttling speed regulating circuit composed of differential pressure variable pump and throttle valve, and make the pressure difference between the two ends of throttle valve as small as possible to reduce the pressure loss.

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