Seal arrangement for a motor pump assembly and a motor for a pump including a seal arrangement

摘要

An electric machine includes an end frame having a shaft bore extending therethrough. The end frame includes a first side and a second side. A shaft extends through the shaft bore. A bearing is supported by the end frame and is coupled to the shaft to support the shaft for rotation about a longitudinal axis. A first seal is fixedly attached to the end frame and includes an internal bore that is sized to cooperate with the shaft to form a seal point therebetween. The first seal is disposed on the first side of the end frame. A second seal is fixedly attached to the second side of the end frame. The second seal includes a movable portion in direct contact with the shaft to define a second seal point. The first seal point is on a first side of the bearing and the second seal point is on a second side of the bearing.

主权项

1. An open drip proof motor arranged to drive a rotating element of a pump, the motor comprising:
a housing including a pump end and a non-pump end; a stator disposed within the housing and including an opening, the stator fixed with respect to the pump; a rotor positioned at least partially within the opening and operable to rotate in response to the application of an electric current to the motor; a shaft coupled to the rotor to support the rotor for rotation; an end frame fixedly coupled to the pump end of the housing; a bearing supported by the end frame and coupled to the shaft to support the shaft for rotation, the bearing defining a first side and a second side; a first seal assembly coupled to the end frame and positioned between the bearing and the rotor, the first seal assembly cooperating with the shaft and the end frame to substantially enclose the first side of the bearing, the first seal assembly including a wall that defines an aperture that is positioned adjacent the shaft to create a non-contact seal therebetween and an outer portion coupled to the housing to define a seal area having a portion that extends beyond an outer diameter of the bearing; a second seal assembly coupled to the end frame and positioned between the bearing and the pump, the second seal assembly arranged to substantially enclose a second side of the bearing; and a third seal assembly coupled to the end frame and positioned between the second seal assembly and the pump.