Characteristics and application of 11 kinds of hydraulic speed regulation

1. Manual variable pump ⁃ hydraulic cylinder

The system is simple, the pressure is constant, generally can not be adjusted in the work, high efficiency, suitable for various occasions, the most widely used.

2. Variable pump ⁃ quantitative motor

The output torque is constant, the speed regulation range is large, the component leakage has great influence on the speed rigidity, and the efficiency is high, which is suitable for high-power occasions.

3. Quantitative pump ⁃ variable motor

The output power is constant, the speed regulation range is small, the component leakage has great influence on the speed rigidity, and the efficiency is high, which is suitable for high-power occasions.

4. Variable pump ⁃ variable motor

The output characteristics synthesize the characteristics of the above two motor speed control circuits, the speed control range is large, but the structure is complex, the price is expensive, suitable for high-power occasions.

5. Quantitative pump ⁃ fuel throttle speed regulation

Simple structure, low cost, wide speed range, medium efficiency, can not bear negative load, suitable for medium power occasions.

6. Quantitative pump ⁃ return oil throttle speed regulation

Simple structure, low cost, wide speed range, low efficiency, suitable for low speed and low power occasions.

7. Quantitative pump ⁃ bypass throttle speed regulation

Simple structure, low cost, small speed range, high efficiency, can not bear negative load, suitable for high-speed medium power occasions.

8. Limited pressure variable pump ⁃ oil (or return oil) throttle speed

The speed range is large, the efficiency is high, the price is expensive, suitable for medium and small power occasions, it is not suitable to work at low speed for a long time.

9. Servo variable pump ⁃ quantitative actuator

The output pressure of the pump is constant, which is used in the case of following or changing speed during the work.

10. Constant power variable pump ⁃ hydraulic cylinder

The output flow of the pump automatically decreases with the pressure, which is suitable for the occasions of automatic conversion of fast and slow speed and energy saving systems.

11. Constant pressure variable pump ⁃ hydraulic cylinder

Pump pressure reaches the set value output flow is zero, automatically prevent system overload.