| 摘要 |
A pump assembly is provided including a motor, a motor housing, a dual-bearing rotational drive assembly, an integrated adapter, a pump housing, a seal assembly, and an impeller. In accordance with one embodiment of the present invention, the dual-bearing rotational drive assembly comprises a drive shaft and first and second bearings. The motor housing is disposed about the motor and defines a front end and a rear end. The pump housing is disposed about the impeller. The integrated adapter is arranged to couple mechanically the rear end of the motor housing to the pump housing. The motor is arranged to impart rotational movement to the drive shaft about a drive shaft axis. The drive shaft is coupled to the impeller such that rotation of the drive shaft causes rotation of the impeller. The drive shaft defines a first end disposed proximate the front end of the motor housing and a second end disposed proximate the impeller such that the drive shaft extends from the front end of the motor housing, through the rear end of the motor housing, and to the pump housing. The first rotational support is arranged proximate the front end of the motor housing. The second rotational support is accommodated by the integrated adapter. The pump assembly is arranged such that the drive shaft and the first and second rotational supports define a rotational drive assembly characterized by the absence of additional rotational support between the first rotational support proximate the front end of the motor housing and the second rotational support accommodated by the integrated adapter.
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