Hydraulic oil filter is a device used to filter solid impurities in hydraulic system. In the operation process of hydraulic system, the quality of hydraulic oil has a crucial impact on the performance of the system. In order to ensure the normal operation of the hydraulic system and extend its service life, the hydraulic oil filter plays an indispensable role. The following is the specific introduction:
1. Functional significance of hydraulic oil filter
(1) Filter impurities: Hydraulic oil filter is mainly responsible for filtering out mechanical impurities in hydraulic oil such as rust, casting sand, welding slag, iron filings, etc., as well as external intrusive dust and metal powder generated during the work process.
(2) Protection system: By removing these solid impurities, the hydraulic oil filter helps to prevent the gap between the relative moving parts and the throttle hole from sticking or blocking, reducing internal leakage, improving system efficiency, and reducing the failure rate.
2. Classification characteristics of hydraulic oil filter
(1) Classification by accuracy: hydraulic oil filters can be divided into crude oil filters, ordinary oil filters, fine oil filters, special fine oil filters, different categories of filters are suitable for different filtration needs and working environments.
(2) According to the type of filter: the common types of hydraulic oil filters include mesh oil filters, line gap oil filters, paper core oil filters and sintered oil filters, which each have different filter materials and structural characteristics, such as copper mesh, steel wire tightly wound, microporous filter paper, metal powder sintering.
3. Installation position of hydraulic oil filter
(1) Oil suction filter: located in the oil suction port of the hydraulic pump, mainly to protect the hydraulic pump from damage by large particles of impurities, usually using low-precision filters.
(2) Pressure line filter: installed in the pressure oil circuit, used to protect downstream hydraulic components, such as relief valves, which require high filtration accuracy.
(3) Return oil filter: located on the return oil line, used to remove impurities before the oil is returned to the tank, especially suitable for the filtration needs when the system is stable.
4. Selection criteria of hydraulic oil filter
(1) Filtration accuracy: Select the appropriate filtration accuracy according to the requirements of the system for oil cleanliness and the sensitivity of hydraulic components.
(2) flow capacity: the hydraulic oil filter should have sufficient flow capacity to meet the working flow requirements of the system and ensure a small pressure drop.
(3) Mechanical strength: the filter should be able to withstand the working pressure of the system and possible pressure shocks to ensure stable performance under various working conditions.
5. Technical requirements of hydraulic oil filter
(1) Material properties: The material of the hydraulic oil filter should have a certain mechanical strength, can resist corrosion and adapt to changes in working temperature.
(2) Structure design: hydraulic oil filter requires simple structure, compact size, easy to clean and replace the filter element.
(3) Cost consideration: under the premise of meeting the technical requirements, the filter should be selected as low cost and economical and practical as possible.