Hydraulic Equipment Precautions

- Jun 11, 2018 -

Hydraulic equipment precautions

1. Oil tank wall material or paint should not be changed to oil pollution source all the time. It is better to use stainless steel as the fuel tank material of hydraulic control system.

2. The use of high-precision filter, according to the requirements of the electro-hydraulic servo valve on the filtration accuracy, generally 5-10um

3. After the tank and piping system are subjected to a general acidity treatment process, inject low-viscosity hydraulic oil or turbine oil for no-load cycle rinsing. After flushing, release all the cleaning oil, and inject the qualified hydraulic oil into the oil tank through the precision filter.

4. In order to ensure that the hydraulic control system has a better purification function during operation, it is best to add a low-pressure self-circulation cleaning circuit

5. Install the electro-hydraulic servo valve as close as possible to the hydraulic actuator. Use as few hoses as possible between the servo valve and the actuator. These are to increase the frequency response of the system.

6. Electro-hydraulic servo valve is a precise product integrating mechanical, hydraulic and electrical integration. It must have basic knowledge before installation and commissioning. In particular, it is necessary to read and understand product samples and instructions in detail. Pay attention to the points;

a The model of the installed servo valve is in accordance with the design requirements. The servo valve dynamic and static performance test data at the factory are complete.

b The servo amplifier model and technical data meet the design requirements, and its adjustable parameters must match the servo valve used;

c Check the control coil connection mode of the electro-hydraulic servo valve. Which one meets the design requirements in series, parallel, or differential link?

d The feedback sensor model and linking method meet the design needs, in particular, pay attention to the sensor's accuracy, it directly affects the system's control accuracy;

e Check whether the pressure and stability of the oil source meet the design requirements. If the system has an accumulator, check the inflation pressure.

7. The hydraulic cylinder used in the hydraulic control system should be a low-friction hydraulic cylinder. The minimum starting pressure should be measured before installation, as a basis for checking the hydraulic cylinder in the future.

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