Electronic water pump and housing assembly thereof
A method of providing a housing assembly and an electronic water pump, a housing assembly and an electronic water pump are provided. The housing assembly of the electronic water pump has a stator assembly, a rotary shaft, a shaft base, and an injection molded housing. The stator assembly is formed through one-piece injection molding. The housing assembly is formed by over-molding. The rotary shaft and the shaft base of the pump are embedded in the injection molded housing. The stator assembly is enclosed by the injection molded housing to provide self-sealing between the stator assembly and the injection molded housing.
1. A method of providing an electronic water pump, comprising:
providing a water power part;
providing a brushless motor part; and
providing a control part,
wherein:
the water power part comprises a pump housing and an impeller;
the brushless motor part comprises a rotor and a housing assembly;
the control part comprises a control panel and a rear end cover; and
the brushless motor part is arranged between the water power part and the control part,
wherein the housing assembly is provided by:
providing a stator assembly through one-piece injection molding; and
providing a housing through injection molding,
wherein the housing is over-molded on the stator assembly to enclose the stator assembly, such that self-sealing is provided between the stator assembly and the housing,
wherein:
the impeller comprises an impeller main body and a blade;
the rotor comprises a rotor core, a magnetic steel and a shaft sleeve; and
the rotor core is provided with a magnetic steel groove and the magnetic steel is installed in the magnetic steel groove, and
wherein the method further comprises:
packing the rotor core and the magnetic steel inside the impeller main body through plastic molding to form a first precursor of an impeller rotor assembly;
over-molding the shaft sleeve into the first precursor to form a second precursor of the impeller rotor assembly; and
connecting the second precursor to the blade to form the impeller rotor assembly.
2. The method of claim 1 , wherein:
the blade comprises an injection molded body; and
the second precursor of the impeller rotor assembly and the blade are integrally welded through ultrasonic waves.
3. The method of claim 1 , wherein the shaft sleeve has a first wear resistance and the impeller main body has a second wear resistance, the first wear resistance being greater than the second wear resistance.
4. The method of claim 3 , further comprising:
providing a first sealing ring between a front end of the housing of the housing assembly and a housing of the pump to form a closed water power cavity; and
providing a second sealing ring between a rear end of the housing of the housing assembly and the rear end cover to form a closed electric control chamber.
5. The method of claim 3 , further comprising:
fixedly connecting the water power part to the brushless motor part by screws; and
fixedly connecting the brushless motor part to the control part by screws.
6. An electronic water pump comprising:
a water power part;
a brushless motor part; and
a control part,
wherein:
the water power part comprises a pump housing and an impeller;
the brushless motor part comprises a rotor and a housing assembly;
the control part comprises a control panel and a rear end cover; and
the brushless motor part is arranged between the water power part and the control part, and
wherein the housing assembly comprises:
a stator assembly formed through one-piece injection molding;
a housing formed through injection molding;
wherein the housing is over-molded on the stator assembly to enclose the stator assembly, such that self-sealing is provided between the stator assembly and the housing,
wherein:
the impeller comprises an impeller main body and a blade;
the rotor comprises a rotor core, a magnetic steel and a shaft sleeve;
the rotor core is provided with a magnetic steel groove and the magnetic steel is installed in the magnetic steel groove;
the rotor core and the magnetic steel are packed inside the impeller main body through plastic molding as a first unit of an impeller rotor assembly;
the shaft sleeve is over-molded into the first unit to form a second unit of the impeller rotor assembly; and
the blade is connected to the second unit to form the impeller rotor assembly.
7. The electronic water pump of claim 6 , wherein:
the blade comprises an injection molded body; and
the second unit and the blade are integrally welded through ultrasonic waves.
8. The electronic water pump of claim 6 , wherein the shaft sleeve has a first wear resistance and the impeller main body has a second wear resistance, the first wear resistance being greater than the second wear resistance.
9. The electronic water pump of claim 8 , further comprising:
a first sealing ring provided between a front end of the housing of the housing assembly and a housing of the pump to form a closed water power cavity; and
a second sealing ring provided between a rear end of the housing of the housing assembly and the rear end cover to form a closed electric control chamber.
10. The electronic water pump of claim 8 , further comprising:
screws fixedly connecting the water power part to the brushless motor part; and
screws fixedly connecting the brushless motor part to the control part.