| 摘要 |
The disclosure concerns a hydrodynamic torque transfer unit, especially in the form of a hydrodynamic brake. The unit includes a working chamber with a stator and a rotor therein. The rotor is supported on a rotating shaft which has seals thereon outside the working chamber. Working fluid that leaks past the rotor shaft seals is collected in a leaked fluid reservoir. Both the fluid outlet from the leaked fluid reservoir and from the outlet line connected with the working chamber are delivered to a working fluid cooling reservoir. The working chamber is fed with working fluid from a separate feed reservoir. The cooling reservoir delivers recirculated working fluid to the feed reservoir. The feed reservoir is selectively pressurizable to force working fluid into the working chamber. A valve selectively pressurizes the feed reservoir and when it permits the feed reservoir to become depressurized, the valve communicates the pressure from the feed reservoir to the leaked fluid reservoir to drive fluid from the latter to the cooling reservoir. Other valves prevent transfer of working fluid from the cooling reservoir to the feed reservoir when the feed reservoir is pressurized and is delivering working fluid to the working chamber; and prevent transfer of working fluid from the feed reservoir when the feed chamber is not being pressurized and at this time permits working fluid to transfer from the cooling reservoir to the feed reservoir. |
