| 摘要 |
A self-powered centrifugal separator comprises a base (10), a rotor (11) mounted on an operably substantially vertical axis (12) for rotation thereabout by reaction to fluid emission from nozzles in the base, a housing (13) mounted on the base and enclosing the rotor, a sump (14) formed in the base (10) below the rotor (11), a fluid passageway (16) through the base extending from an inlet port (17) to an outlet port (18) and including a diversion port (19) to supply fluid to the interior of the rotor (11) by way of the rotation axis (12), and a drain passage (15) in the base for draining fluid from the sump (14) to the fluid passageway (16). A spring loaded valve body (30) is provided in the fluid passageway (16) and is configured and arranged to shut off supply of fluid to the interior of the rotor (11) when pressure of fluid entering the inlet port (17) falls below a predetermined minimum pressure value so that an engine to which the fluid is supplied as lubricating fluid is not at risk of damage. The valve body (30) is also configured and arranged (at 38, 39) to restrict and/or shut off supply of fluid to the interior of the rotor (11 ) when pressure of fluid entering the inlet port (17) rises above a second predetermined pressure value so that the rotor speed cannot be increased so much that there is risk of damage to the separator itself. Furthermore, a Venturi arrangement is provided in the fluid passageway (16) to develop suction pressure to draw fluid from the drainage passage into the fluid passageway and said Venturi arrangement (40) is conveniently provided integrally with the valve body (30). A non-return formation (50) to prevent back flow of fluid from the outlet port (18) may also be advantageously provided as part of the valve body (30). |
