| 摘要 |
The invention relates to a pump device for low viscosity liquids, particularly lightly polluted water, with an electric drive motor which is arranged above the level of the liquid in a collecting tank (1), whose pump wheel (23) is arranged at a distance from the motor (14) on the bottom (9) of the collecting tank (1) in a pump chamber (11) and which is driven via a shaft (21) bridging that distance, which without a seal extends into the pump sump (41). The pump device has the following characteristics: a) the drive motor (14) is a small electric motor, in particular a two-pole single phase synchronous motor with permanently magnetic rotor (25), b) an intermediate shaft (21) is provided which is composed of a wear- resistant and low-friction plastic, c) the intermediate shaft (21) is divisible but positively connected to the motor shaft (24), d) an intermediate bushing (18) of wear-resistant and low-friction plastic is slipped on to the intermediate shaft, this bushing centering the intermediate shaft on the motor bearing plate (39) and supporting it on an intermediate bearing point (20) between positive connection (38) and pump wheel (23), e) the pump wheel (23) is removable and is only slipped on at the time of assembly. <IMAGE> |
