The structure of the externally mounted self-sealing oil suction filter is relatively complex yet ingeniously designed, primarily aimed at effectively filtering impurities at the oil suction port of the oil pump, protecting the oil pump and other hydraulic components, while simultaneously enhancing the cleanliness and reliability of the hydraulic system. The following are the key structural features of this filter:
I. Overall Layout
Installation Position: The externally mounted self-sealing oil suction filter is typically installed at the oil suction port of the oil pump, allowing for direct installation on the side, top, or bottom of the oil tank.
Oil Suction Method: The oil suction cylinder is submerged below the oil level in the tank to ensure oil intake, while the filter head remains outside the tank for easy operation and maintenance.
II. Core Components
Filter Element:
The filter element serves as the heart of the filter, responsible for filtering impurities and particles from the oil. Its filtration accuracy and material are determined based on operational requirements, with a common filtration accuracy range of 80-180μm.
When the filter element becomes clogged to a certain extent (e.g., when the outlet vacuum reaches 0.018MPa), the filter element contamination and blockage indicator will signal, prompting the need for replacement or cleaning.
Self-Sealing Valve:
This is a crucial safety device of the filter. When replacing or cleaning the filter element or performing system maintenance, unscrewing the filter end cap (cleaning cover) will automatically close the self-sealing valve, isolating the oil path from the tank and preventing oil leakage.
When oil drainage is required, the self-sealing valve can be pushed open to serve as a drain for the oil tank.
Bypass Valve:
The bypass valve is vital for preventing oil pump cavitation. When the filter element becomes severely clogged and cannot be replaced or cleaned promptly (e.g., when the outlet vacuum reaches 0.02MPa or higher), the bypass valve automatically opens, allowing oil to bypass the clogged filter element and enter the oil pump, thus avoiding cavitation.
Filter Element Contamination and Blockage Indicator:
This device monitors the clogging condition of the filter element. When the filter element becomes clogged to a certain degree, it sends a signal to remind operators to replace or clean the filter element promptly.
III. Connection and Installation Methods
Outlet Connection: The filter outlet offers various connection types such as pipe and flange, facilitating connection with oil pipes of different specifications and types.
Easy Installation: The filter's innovative overall design ensures convenient installation, effectively simplifying system piping and enhancing installation efficiency.
IV. Application Scenarios
The externally mounted self-sealing oil suction filter is widely applicable in various hydraulic systems, particularly those requiring high cleanliness and reliability. By effectively filtering impurities and particles from the oil, it protects the oil pump and other hydraulic components from damage, thereby extending equipment lifespan.
In conclusion, the externally mounted self-sealing oil suction filter, through its unique structural design and the synergy of its core components, achieves effective oil filtration and protection, enhancing the overall performance and reliability of the hydraulic system.
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