| 摘要 |
A lubricating pump (1) having a first stage (5) and a second stage (10); the first stage (5) in turn has an intake (6) connectable hydraulically to a tank (4) of lubricating fluid, and a delivery outlet (7) connectable hydraulically to a lubricated member (3); the first stage (5) compresses the lubricating fluid from the tank (4) to a pressure for supply to the member (3); the second stage (10) in turn has an inlet (11) connectable hydraulically to a casing (9) housing the member (3), and an outlet (13) connectable hydraulically to the tank (4); the second stage (10) feeds the lubricating fluid in the casing (9) back into the tank (4); the second stage (10) is a Roots type, and has a first and a second rotor (31, 32) rotating about respective axes (B, C) to feed the lubricating fluid from the inlet (11) to the outlet (13); and the first and second rotor (31, 32) are operated by the first stage (5). |
