Excavator Parts Hydraulic Charge Pump Hydraulic Polit Pump,Gear Pump For Rexroth A4VG90 Hydraulic Piston Pump

Product details:

The Rexroth A4VG90 series piston pumps used in closed systems all require a charge pump to compensate for internal leakage, maintain the pressure of the main circuit, provide oil cooling, compensate for leakage of external valves and auxiliary systems, and provide pressure oil for control.
There are many factors that determine the demand for charge flow and the selection of charge pump specifiions. These factors include: system pressure, pump speed, pump swash plate angle, oil grade, working temperature, radiator size, tubing length and diameter, control response characteristics, auxiliary system flow requirements, hydraulic motor types, etc.

Specifiions:

Each type of charge pump product series derives multiple connection methods: there are tandem pumps and no tandem pumps at the back end. In the selection, it is necessary to accurately select the right type, serial number, number of teeth of the string or not to match, and use accurately

Appliion

The charge pump series products are used in Rexroth oil pumps as a supporting operation for control and charge pumps in a closed system

Our Hydraulic products are used in control digging machines, shield machines, concrete mixers, concrete pump trucks, pumping stations, pavers, graders, rotary drilling rigs, cranes, hydraulic winches, combine harvesters, rolling mills, injection molding machines, Petroleum equipment, environmental protection and other hydraulic machinery. Covers construction machinery, construction machinery, metallurgical machinery, mining machinery, hoisting machinery, injection molding machinery, chemical machinery, petroleum, shipping, environmental protection and other fields.

Product functions and features:

1. Provide cooling oil to the system to reduce the temperature of the system.

2. Maintain the pressure of the main system loop,

3. And provide the operating pressure to the control loop, the operating pressure of the system is generally designed to be the same as the replenishing pressure.

4. Replenish oil loss from internal leakage. In order to avoid damage to the transmission under any driving and braking conditions, the charge pressure must be set at the specified pressure.

5. The charge pump is generally a gear pump or an external gear pump or a cycloid gear fixed pump, which is installed on the main pump and driven by the main pump's main shaft. The pressure of the charge pump is limited by the charge relief valve.

6. The standard charge pump is suitable for most pumps. If the displacement of the charge pump is insufficient, it is necessary to increase the displacement of the charge pump or install a gear pump in the auxiliary spline to provide the necessary Extra oil