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

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;
• 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, wherein the first seal assembly includes a first seal member in direct contact with the end frame and the bearing, a bearing lock plate in direct contact with the first seal member, and a second seal member in direct contact with the bearing lock plate and including an internal bore.

An open drip proof motor arranged to drive a rotating element of a pump, the motor comprising:

• a shaft;
• a rotor coupled to the shaft for co-rotation therewith;
• a housing including a pump end and a non-pump end, the rotor disposed within the housing;
• 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 pump side and a non-pump 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 non-pump side of the bearing, the first seal assembly including a substantially planar portion that defines an aperture sized to receive the shaft and create a non-contact seal therebetween, the substantially planar portion extending radially from the shaft to a diameter beyond an outermost diameter of the bearing;
• a second seal assembly coupled to the end frame and positioned between the bearing and the pump;
• and
• a third seal assembly coupled to the end frame and positioned such that the second seal assembly is disposed between the third seal assembly and the bearing.

An open drip proof motor arranged to drive a rotating element of a pump, the motor comprising:

• a shaft
• a rotor coupled to the shaft for co-rotation therewith;
• a housing including a pump end and a non-pump end, the rotor disposed within the housing;
• 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 pump side and a non-pump 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 non-pump side of the bearing;
• a second seal assembly coupled to the end frame and positioned between the bearing and the pump;
• and
• a third seal assembly coupled to the end frame and positioned such that the second seal assembly is disposed between the third seal assembly and the bearing, wherein the first seal assembly includes a first seal member in direct contact with the end frame and the bearing, a bearing lock plate in direct contact with the first seal member, and a second seal member in direct contact with the bearing lock plate and including an internal bore.