Oil filter is a series of coarse filter pipe can also be used for gas or other media particles filter, installed in the pipeline can remove the fluid in the larger solid impurities, so that machinery and equipment (including compressors, pumps, etc.), the instrument can be normal Work and operation, to achieve a stable process to ensure the safety of production. Basket filter The main filter material is stainless steel perforated plate, stainless steel braid and stainless steel sintered mesh. The oil filter can be customized according to the specific requirements of customers (special pressure, special caliber). Basket filter with a large amount of pollutants, high pressure, easy installation and cleaning advantages.
When choosing an oil filter, consider the following:
(1) filter accuracy should meet the required requirements.
(2) can maintain a sufficient flow capacity for a long time.
(3) filter has enough strength, not due to the role of hydraulic damage.
(4) filter corrosion resistance, and can work at a specified temperature for a long time.
(5) filter cleaning or easy to replace.
Therefore, the oil filter should be based on the technical requirements of the hydraulic system, according to the filter accuracy, flow capacity, working pressure, oil viscosity, operating temperature and other conditions selected its model.
2. Install the oil filter in the hydraulic system installation location usually have the following:
(1) to be installed in the suction port of the pump:
Pump suction circuit is generally installed on the surface of the oil filter, the purpose is to filter out larger impurities to protect the hydraulic pump, in addition to the filter capacity of the filter should be more than twice the pump flow, the pressure loss is less than 0.02MPa.
(2) mounted on the outlet oil of the pump:
The purpose of the oil filter installed here is to filter out contaminants that may penetrate valves and other components. The filtration accuracy should be 10 ~ 15μm, and can withstand the working pressure on the oil and the impact pressure, the pressure drop should be less than 0.35MPa. At the same time should be installed safety valve to prevent the filter plug.
(3) installed on the system back to the oil: this installation from the indirect filter. Generally with the filter and even install a back pressure valve, when the filter block to a certain pressure value, the back pressure valve open.
(4) installed in the system branch on the road.
(5) separate filtration system: large hydraulic system can be set up a hydraulic pump and oil filter composed of independent filter circuit.
In addition to the entire system required for the oil system, but also often in some important components (such as servo valves, precision throttle valve, etc.) in front of a separate installation of a dedicated fine filter to ensure their normal work.
The principle of oil and gas filters is the use of oil and water vapor ratio of different oil and gas separation. The oil filter is a cylindrical tank with a barrel-like filter element that separates the oil and water from the compressor. In general, air compressor oil and gas separator block the main reasons are the following.
A) air compressor around the environment
Air compressor around the environment with corrosive gases, such as some occasions there will be sulfide, days that water, cleaning chemicals and other volatile in the air, the machine itself to accelerate the high temperature of the oil oxidation, once the gas Into the air compressor system and the oil chemical reaction, resulting in carbon deposition and sludge and so on. Part of the impurities into the oil circulation system is blocked by oil filter, another part of the impurities followed by oil and gas mixture rose to oil. When the gas through the oil, these impurities remain in the oil filter paper, the filter hole blocked, the oil resistance gradually increased, resulting in oil in a short period of time need to be replaced in advance.
B) do not use qualified air filter, oil filter, oil, one or more are present.
Poor filtering accuracy of the air filter will make some of the dust particles in the air can not be intercepted directly into the air compressor system, oil filter and oil load is too large, leading to clogging; into the air compressor system impurities, oil oxides, wear Metal particles and so on due to poor filtration efficiency of oil filter, part of the interception in the filter filter layer, another part of the impurities have been circulating in the machine until the oil up, separated after the retention of oil in the filter layer, leading to premature oil clogging; Poor oxidizing oil should not be used, even if the working time is short, will produce carbon and jelly, the oil clogged.
(C) air filter connection between the main entrance of the air leakage.
The common causes of leakage are: air filter is not installed; air filter assembly contact area uneven; air filter and the assembly of the contact surface with dirt attached to the above, leading to leakage; air filter surface of the elastic contact pad put crooked ; Air filter or air filter assembly rupture and so on.
(D) of the oil on the filter too much moisture to expand the pores of the filter, so that the effective separation of oil to reduce the area, resulting in increased oil resistance, oil clogging in advance.