The Oil Return Filter is mainly installed on the oil return pipe of the hydraulic system, and various dirt such as abrasive particles generated by various hydraulic components during the working process can be intercepted by setting the Oil Filter of the oil return pipe to avoid returning to the tank and being inhaled by the hydraulic pump again. The allowable pressure difference of the oil filter in the return pipeline ranges from 0.3 to 0.5MPa according to different pressure levels. The accuracy is determined according to the requirements of oil pollution
.
The setting of the oil filter should be considered more factors, one of the important factors is hydraulic shock, especially in the case of upstream hydraulic cylinder and proportional valve, under high pressure hydraulic cylinder reversing and proportional valve sudden power loss, will produce a large instantaneous flow impact, the filter element of the oil filter will cause great harm, in the design of the oil filter to be fully understood, Structural strengthening
The oil return filter is divided into four types: chemical fiber type, paper type, net type and line gap type. Chemical fiber filter is better than paper filter, high precision, chemical fiber filter and paper filter is more difficult to clean after plugging, so the filter must be replaced. The oil return filter is equipped with a pressure difference signaling device. When the filter element is polluted and blocked, the pressure difference between the inlet and outlet of the oil port reaches 0.35MPa, a switching signal is issued. At this time, the filter element should be cleaned or replaced
What are the requirements for the working environment of the oil return filter
1, the filtration accuracy of the oil return filter must meet the requirements of the work
2, to maintain the ability to flow in a longer period of time
3, the efficient fiber filter element should have sufficient strength and hardness, and can not be accidentally damaged because of hydraulic pressure
4, the oil return filter should have strong corrosion resistance and work normally and permanently at the specified temperature
5, the oil filter core is easy to clean or replace. Therefore, the filter should be selected according to the technical requirements of the hydraulic system, according to the filtration accuracy, flow capacity, working pressure, oil viscosity, working temperature and other conditions
The importance of the return oil filter
In order to prevent the intrusion of foreign matter and dust, the hydraulic oil filter plays the role of removing metal powder, sludge or foreign matter that is invaded in the hydraulic circuit due to the use of the crushing hammer and the replacement of the working device. If it is not replaced regularly, the filter will be clogged and the filtering function will be lost. The filter without filtering function cannot completely remove garbage and foreign matter, which will cause foreign matter to mix into the loop. As a result, it will cause serious failures such as wear and sintering of the hydraulic device, and it can be seen at this time how important is the correct replacement of the hydraulic oil filter
