| 摘要 |
The invention relates to a spin-on centrifugal filter or separator for purifying liquid such as oil used in an engine, and to the method of making and assembling the same. The completed separator is in the form of a spin-on cartridge having rotatably mounted therein a jet-actuated, centrifugal separator or rotor. The cartridge, which can conveniently be screw-threaded and thus of the spin-on type, comprises an outer housing or casing within which the rotor is mounted on a perforated hollow shaft depending from a spin-on cover for the cartridge which may be applied to the outer casing or housing after the rotor has been assembled on the hollow shaft. Liquid, e.g., oil, to be treated enters the cartridge from the engine casing, through a screw-threaded opening in the spin-on cover, passes to and through the hollow perforated shaft into the interior of the rotor where the liquid, under pressure, serves to impart centrifugal motion to the rotor, and passes outwardly from the rotor through jet openings therein. The resulting rapid rotation of the rotor separates heavy impurities from the liquid by centrifugal action, and the purified liquid then passes through an outlet in the housing or casing at the opposite end from the liquid inlet and thence back to the engine crankcase. More specifically the device comprises a spin-on centrifugal filter or separator cartridge adapted for use with the engine blocks of motor vehicles such as heavy duty trucks, or in smaller version in connection with lighter trucks or passenger cars and includes an outer spin-on casing or housing having inlet means for receiving oil under pressure from the engine block, said oil containing particles or contaminants of greater specific gravity than the oil when freed of such contaminants, an inner rotor unit adapted to receive oil from the housing inlet means, said rotor unit being mounted for rotation within the housing and having peripherally mounted reaction jet openings for imparting rotation to the rotor unit when oil under pressure passes through the jet openings, and baffled outlet means at the opposite end of the housing or casing from said inlet means.
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