A double variable vane hydraulic pump is a type of hydraulic pump that operates using a set of vanes that move within a rotor, creating variable displacement within the hydraulic system. Unlike fixed displacement pumps, which always move the same volume of fluid, variable displacement pumps can adjust the amount of fluid they pump depending on the needs of the system. The “double” aspect of these pumps refers to the fact that they contain two separate pumping chambers, allowing them to provide variable flow for two separate circuits simultaneously.

In these pumps, the vane positions can be adjusted dynamically based on the system's pressure requirements. The vane mechanism uses centrifugal force to generate the fluid flow, and by adjusting the vane angle, the displacement can be increased or decreased, effectively controlling the fluid flow rate. This functionality makes double variable vane pumps highly adaptable, able to meet the changing demands of hydraulic systems in real-time.

Double variable vane hydraulic pumps are known for several key characteristics that make them a preferred choice in hydraulic applications. These characteristics include:

The primary characteristic of double variable vane pumps is their ability to vary the displacement. This means that the pump can adjust the volume of fluid being delivered to the hydraulic system based on the system's pressure requirements, optimizing energy consumption and improving overall efficiency. The ability to adjust the flow rate allows the system to operate more smoothly and respond more effectively to changing operational conditions.

Another important feature of double variable vane hydraulic pumps is their ability to serve two separate hydraulic circuits simultaneously. This dual functionality is particularly beneficial in complex hydraulic systems that require independent flow control for different components. For example, a construction machine may need separate flows for lifting arms and steering systems. By using a double variable vane pump, both functions can be powered independently, ensuring precise control and better performance.

https://www.dxvanepump.com/product/pv2r-series-vane-pumps-with-high-pressure-and-lower-noise/pv2r31-double-pump-hydraulic-power-vane-pump-with-low-noise-and-high-pressure.html
Note: 
1. When the nominal displacement "4", "6", and "8" pumps are used with a pressure exceeding 16MPa, the rotation speed should exceed 1450r/min.
2. When using a large-displacement single pump and corresponding double pumps at high speeds, the suction inlet negative pressure should be reduced.
3. When using synthetic hydraulic oil and aqueous hydraulic fluid, the maximum speed is limited to 1200r/min.
4. For occasions where low noise is particularly required, it is recommended that the working speed be 1000r/min.
5. The driving power is under the working conditions of P=16MPa and n=1500r/min.