1. Cool the custom Hydraulic Gear Pumps ( https://www.daye-hydraulic.com/product/hydraulic-gear-pumps/ ) and motor housing, and prohibit excessive pressure inside the housing. It is sometimes necessary to pass oil to the hydraulic pump and motor housing to cool the hydraulic pump and motor. But remember not to let the oil pressure in the casing be too high, otherwise it will damage the hydraulic pump and the motor shaft seal, and at the same time increase the resistance of the plunger of the suction chamber to extend outward to some plunger pumps.

2. When the hydraulic pump often works at zero eccentricity or the system working pressure is lower than 8 MPa, resulting in the hydraulic pump being too small and causing the pump body to heat up, the oil circuit can be selected for forced circulation cooling.

The built-in relief valve in the hydraulic pump is contraindicated for system pressure regulation, and is only suitable for installing a simple direct-acting relief valve in certain types of hydraulic pumps as a safety valve. The valve has a small diameter and is generally not suitable for system pressure regulation, but suitable for use as a safety valve. The structure of the relief valve is similar to that of the safety valve, but the diameter of the two valves is different, and the purpose of use is also different. Because the relief valve of the system pressure regulation requires a larger valve diameter, it is mainly used to stabilize the system pressure and the flow rate is different; while the safety valve is mainly used to maintain the system pressure without overloading, generally the diameter is small, and the flow rate is small. , the system pressure cannot be returned to normal. Therefore, the built-in relief valve of the hydraulic pump is not suitable for system pressure regulation, but only suitable as a safety valve.

Hydraulic pump manufacturers remind you: precautions for the use of hydraulic pumps

4. It is forbidden for the hydraulic pump drive shaft to receive large radial force. Except for specially designed hydraulic pumps that can accept large radial forces, the drive shafts of most hydraulic pumps cannot accept large radial forces. If the shaft is subjected to large radial forces, the stress conditions of the relevant components in the pump will be very severe, or the sealing volume in the pump will not form properly, thereby damaging the hydraulic pump earlier.

5. It is forbidden to use the constant power speed control circuit alone. Quantitative pump and variable motor form a constant power speed control circuit. In general, speed control circuits require greater speed rigidity. The speed stiffness of the circuit is proportional to the square of the motor displacement. When the displacement of the variable motor is reduced, the speed rigidity drops sharply and the torque that can be produced is also reduced, so this circuit is rarely used alone.

It is taboo that the pump and the motor are common. The use of the pump as the motor is conditional. In some hydraulic systems, the same component (pump or motor) is sometimes required for pump operation and sometimes for motor operation. Attention should be paid to the selection of such components: in principle, the hydraulic motor can be used as a pump, but there are conditions for the pump to be used as a motor. For example, some gear pumps can only rotate in one direction as a motor, while the Tractor Gear Pumps Manufacturers ( https://www.daye-hydraulic.com/product/ ) hydraulic pump with one-way valve distribution oil cannot be used as a hydraulic motor at all.

7. Prevent the loss of pipeline pressure, so that the output flow of the constant power variable pump cannot meet the expected requirements. The outlet of the constant power variable pump is connected to the hydraulic cylinder through a one-way valve and a reversing valve, and the return oil of the hydraulic cylinder also needs to flow to the oil tank through the corresponding valve. If some valves are small in size and the pressure loss is large, the output flow of the pump will be too small to meet the requirements of the hydraulic cylinder to run quickly.