| 摘要 |
The inlet of a relatively large viscosity pump for high speed applications is sealed by a small viscosity pump which directs a stream of oil onto the rotor of the large viscosity pump to produce an air seal that increases the inlet suction of the large viscosity pump. The small viscosity pump includes (1) an air scraper in close proximity to the rotor of the large viscosity pump immediately before the rotor enters an oil chamber, and (2) a small oil conduit which extends adjacent the air scraper to the oil chamber of the large viscosity pump. The suction produced by the air scraper draws oil up through the small oil conduit and onto the periphery of the rotor to produce an air seal at the point where the rotor enters the inlet of the larger pump.
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