In a hydraulic system, a hydraulic pump carries a lot of hydraulic cylinders and hydraulic motors
In the case of a quantitative pump, excess flow is returned to the tank by the overflow valve. Doesn't it work at the same time, or does it mean that there is a possibility of working at the same time? You have to think about it, and it determines whether your pump selection will meet the system's traffic requirements.
If these components sometimes need to work at the same time and require a lot of power, you can use a load sensitive variable pump. The required flow is allocated by multi-directional valve and the hydraulic pump is automatically adjusted for the change of the required flow and pressure. Low pressure circuits can be used with pressure-relief valves. Since you have more components, using a quantitative pump is a waste of energy and the system is hot and unsuited.
But how do you allocate it, based on the size and pressure of the pipes? " The multiple channel valves are all the same, so they must be distributed under pressure. The "multi-way valve" and "load sensitive proportional multi-way valve" are completely different valves, and the principle of control is different, and you don't know which one you choose. If you want to work with multiple loads at the same time, it must be a proportional multi-way valve. If "there is no coordination between these execution elements", select the normal multi-channel valve. Normal multi-way valve, maximum pressure of each valve can be restricted by the secondary overflow valve, the flow can choose different valve core. Proportional multi-way valve, maximum pressure is secondary overflow valve control, flow determines valve core opening degree. Using a quantitative pump, the excess flow can only go through the overflow valve, and the high pressure will return to the fuel tank, no matter the multi-way valve or the proportional multi-way valve. But using variable pumps, the proportional multi-channel valve can use load sensitive function, control the Angle of the inclined plate of the oil pump, thus ensuring that no excess oil is wasted. However, it is important to note that the "constant pressure variable pump" must be equipped with a load sensitive variable pump, which is essentially a quantitative pump.
If don't work at the same time, you pump displacement can be much smaller, then the system according to the maximum working pressure of all circuit, then multiplied by the coefficient to select pump discharge, head of the relief valve of the road. Each loop then adds a separate overflow valve. This ensures that the circuit pressure is in line with the requirements. As for the flow, each loop can be set using the speed control valve. Pumps can be used for a quantitative pump, but it is recommended that you use the constant pressure variable pump. Load sensitive variable pump, which is based on the system need to adjust the flow rate and pressure, as for the principle, you can check the working principle of load sensitive pump, is more complex.
