Pressure, flow rate and geometric dimensions of hydraulic actuators are the three main parameters of hydraulic systems. They are the basis for drafting hydraulic systems and selecting hydraulic components. The determination method is generally to pre-select the appropriate system design pressure by analogy, then calculate and determine the geometric size of the hydraulic actuator according to the maximum load of the hydraulic actuator, and finally calculate and determine the flow rate according to the speed requirement of the actuator.
1, Design pressure selection taboo, increase the system pressure, can reduce the geometric size, weight and flow of the actuator, but if the pressure is too high, it will generally increase the cost, shorten the life of the component, increase the internal leakage, and increase the oil temperature. Higher practical issues. In actual design work, the following factors should be considered comprehensively.
2. Cost (price). The price of hydraulic components (including pumps, valves, actuators and auxiliary prices) generally depends on the size of the pressure. Since maintenance costs need to be considered when determining the pressure, it cannot be considered to be low pressure , Low cost; high pressure, high cost. It should be considered according to specific conditions of use.