| 摘要 |
A centrifugal pump has a shaft (10) mounted on bearings (11, 12) in a housing and carries a rotor (22, 23) which in use directs liquid to an oulet (25). A metal to metal seal (17) protects the bearings from the liquid being pumped. Coolant for the seal is directed at the seal through passages (33) and the water collects in a collection groove and is returned to the exterior of the pump. Any of the liquid which is being pumped which may approach the seal is also collected in the groove and is led away before it can reach the seal. |
