| 摘要 |
An oil seal for an end bearing of an electric motor with one or more internal cooling fans. The oil seal includes: (a) a non-contact floating ring seal, forming a first stage integrated into the bearing housing; (b) an adjacent labyrinth seal with three lands and two grooves, forming a second and third stage; and (c) air conduits that pressurize the groove of the third stage with air discharged from the stator during operation of the motor, forming an air seal room that inhibits the effect of fan suction that could otherwise draw oil from the bearing housing. |
