Multi way directional valve manufacturer

ZS-L series multi way directional valve

Firstly, from the perspective of power source - pump, considering the diversity of actuator working conditions, sometimes the system requires high flow and low pressure; Sometimes small flow rates and high pressure are required. Therefore, it is advisable to choose a pressure limiting variable displacement pump, as the flow rate of this type of pump varies with changes in system pressure. When the system pressure decreases, the flow rate is relatively large, which can meet the fast stroke of the actuator. When the system pressure increases, the flow rate decreases accordingly, which can meet the working stroke of the actuator. This can not only meet the working requirements of the actuator, but also make the power consumption more reasonable.

Secondly, hydraulic oil inevitably experiences pressure and flow losses when passing through various hydraulic valves, which account for a significant proportion of the total energy loss. Therefore, choosing a hydraulic actuator reasonably and adjusting the pressure of the pressure valve is also an important aspect of reducing power loss. The flow valve should be selected according to the flow regulation range in the system and ensure that its minimum stable flow can meet the usage requirements. The pressure of the pressure valve should be set as low as possible while ensuring the normal operation of the hydraulic equipment.

Thirdly, if the actuator has speed regulation requirements, then when selecting the speed regulation circuit, it is necessary to meet the speed regulation requirements while minimizing power loss as much as possible. The common speed control circuits include throttling speed control circuit, volumetric speed control circuit, and volumetric throttling speed control circuit. The power loss of the throttling speed control circuit is large, and the low-speed stability is good. The volumetric speed control circuit has neither overflow loss nor throttling loss, with high efficiency, but poor low-speed stability. If both requirements need to be met simultaneously, a volume throttling speed control circuit consisting of a differential pressure variable pump and a throttle valve can be used, and the pressure difference between the two ends of the throttle valve should be minimized as much as possible to reduce pressure loss.

Fourth, choose hydraulic oil reasonably. When hydraulic oil flows in the pipeline, it will exhibit viscosity, and when the viscosity is too high, it will generate significant internal friction, causing the oil to heat up and increasing the resistance to oil flow. When the viscosity is too low, it is easy to cause leakage, which will reduce the system's volumetric efficiency. Therefore, it is generally recommended to choose oil with suitable viscosity and good viscosity temperature characteristics. In addition, when the oil flows in the pipeline, there are also pressure losses along the way and local pressure losses. Therefore, when designing the pipeline, try to shorten the pipeline as much as possible and reduce bends.