Electric water pump with a canned motor

Abstract

An electric water pump with a canned motor is provided. The electric water pump includes a can-integrated volute body and a rotor support. The can-integrated volute body includes a volute body part disposed between a water power part housing and a motor housing and a can part disposed between a rotor and a stator. The volute body part separates a water power part from a driving motor and the can part separates the rotor from the stator. The volute body part and the can part may be integrally formed as one continuous piece and the rotor support is disposed inside the volute body part and rotatably supports the rotor and a motor shaft.

What is claimed is: 
     
         1 . An electric water pump with a canned motor comprising:
 a can-integrated volute body comprising a volute body part disposed between a water power part housing and a motor housing and a can part disposed between a rotor and a stator, the volute body part separating a water power part from a driving motor and the can part separating the rotor from the stator, the volute body part and the can part integrally formed as one continuous piece; and   a rotor support disposed inside the volute body part and rotatably supporting the rotor and a motor shaft.   
     
     
         2 . The electric water pump of  claim 1 , wherein airtightness between the volute body part and the water power part housing is maintained using an O-ring that is disposed at a contact portion of the volute body contacting an inner surface of the water power part housing, and an edge portion of the volute body part is coupled in a form of a flange between the water power part housing and the motor housing. 
     
     
         3 . The electric water pump of  claim 1 , wherein the rotor support comprises a coupling part inserted into one side of the volute body part, a bearing housing part axially disposed in the coupling part to house a bearing fixed therein, and a fluid passage disposed between the coupling part and the bearing housing part to guide a fluid of the water power part to the rotor. 
     
     
         4 . The electric water pump of  claim 1 , wherein the rotor support is clipped to the can-integrated volute body along the groove formed in the can-integrated volute body. 
     
     
         5 . An electric water pump with a canned motor comprising:
 a body comprising a first part disposed between a first housing configured to receive water and surround a water power part, and a second housing surrounding a motor and a second part disposed between a rotor and a stator, the first part separating a water power part from a driving motor and the second part separating the rotor from the stator, the first part and the second part integrally formed as one continuous piece; and   a support disposed inside the first part and rotatably supporting the rotor and a motor shaft.   
     
     
         6 . The electric water pump of  claim 5 , wherein the first part is a volute body part, the second part is a can part, wherein airtightness between the volute body part and the first housing is maintained using an O-ring that is disposed at a contact portion of the volute body contacting an inner surface of the first housing, and an edge portion of the volute body part is coupled in a form of a flange between the first housing and the second housing. 
     
     
         7 . The electric water pump of  claim 5 , wherein the support comprises a coupling part inserted into one side of the volute body part, a bearing housing part axially disposed in the coupling part to house a bearing fixed therein, and a fluid passage disposed between the coupling part and the bearing housing part to guide a fluid of the water power part to the rotor. 
     
     
         8 . The electric water pump of  claim 5 , wherein the body is a can-integrated volute body and the support is clipped to the a can-integrated volute body along the groove formed in the can-integrated volute body.