Function of hydraulic system filter

Function of hydraulic system filter

Filter the impurities in the hydraulic oil to reduce the oil pollution and ensure the normal operation of the hydraulic system. Because the vast majority of various faults of the hydraulic system are caused by oil pollution, and the filter is the main means to keep the oil clean, so it is very important to reasonably select and set the filter in the hydraulic system.

1. according to the different positions of the filter in the hydraulic system, the filter can be divided into oil suction filter, high-pressure filter, oil return filter, off-line filter, oil drain filter, oil injection filter, safety filter, etc.

The main performance indicators of the filter are: filtration accuracy, pressure drop characteristics and scale carrying capacity. According to the different filtration precision, the filter can be divided into coarse filter, ordinary filter, fine filter and super fine filter.

2. filter selection

Precautions for filter selection

1. general matters. Including use purpose, installation position, form and specification of hydraulic pump, used oil and oil temperature, ambient temperature, filter flow, installation and maintenance space, etc

2. filter. Including circuit pressure, maximum operating load differential pressure, bypass valve opening pressure, installation and connection mode, etc.

3. filter element. Filter element type, filtration accuracy, scale carrying capacity, allowable maximum pressure drop, failure pressure, typical pollution conditions, etc.

The technical requirements of the hydraulic system shall be compared and selected. The determined filter type, filter accuracy and size specification shall meet the conditions that the filter accuracy meets the predetermined requirements, has sufficient flow capacity, the filter element has sufficient strength, the filter element has good corrosion resistance, and the filter element is easy to clean and replace.