KR20170079382A

KR20170079382A - Electric Water Pump with Waterproof Configuration

Info

Publication number: KR20170079382A
Application number: KR1020150189868A
Authority: KR
Inventors: 김인상; 차성욱; 김철민; 강희태
Original assignee: 영신정공 주식회사
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2017-07-10

Abstract

The present invention relates to an electric water pump, comprising: a housing; A motor module including a stator fixedly supported on the housing, and a rotor rotatable by an electromagnetic force of the stator; An impeller which is coupled to the motor module and pressurizes the fluid sucked in the suction port and discharges the fluid to the discharge port; And a can sealing part coupled to the housing and sealing the space between the rotor and the stator and supporting the rotor, wherein the can sealing part includes: a body can that accommodates the rotor and supports one side of the rotor; And a cover can coupled to the body can to support the other side of the body can.
Thus, it is simple and convenient that the waterproof function can be achieved more effectively, the rotating rotor can be supported more stably, and the waterproofing of the state can be performed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric water pump,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an electric water pump, and more particularly, to an electric water pump improved in a waterproof structure of an electric water pump and a structure for supporting a rotary part.

Automobiles are a modern means of transportation that combines many components. In such an automobile, the engine that generates power particularly generates a lot of heat. To release such heat, a refrigerant containing water is used and a water pump is used as a means for circulating the refrigerant.

Such a water pump includes an impeller for circulating a refrigerant and a control means for controlling driving means, driving means, and various sensors including an engine or a motor, which is a means for providing rotational force to the impeller.

The contents related to such a water pump are disclosed in Japanese Patent Application Laid-Open No. 2008-121431 (2008.05.29), and Japanese Patent Application Laid-Open No. 10-2015-0101554 (Apr.

However, it is preferable to secure the support of the rotating rotor having a waterproof function more than that of the water pump.

An object of the present invention is to provide an electric water pump capable of more effectively achieving a waterproof function.

Another object of the present invention is to provide a simple and convenient electric water pump which can stably support a rotating rotor and can waterproof the state side.

An object of the present invention is to provide an electric water pump, comprising: a housing; A motor module including a stator fixedly supported on the housing, and a rotor rotatable by an electromagnetic force of the stator; An impeller which is coupled to the motor module and pressurizes the fluid sucked in the suction port and discharges the fluid to the discharge port; And a can sealing part coupled to the housing and sealing the space between the rotor and the stator and supporting the rotor, wherein the can sealing part includes: a body can that accommodates the rotor and supports one side of the rotor; And a cover can coupled to the body can to support the other side of the body can.

The body can includes a U-shaped rotor accommodating portion for accommodating and supporting the rotor, and a can skirt extending in the radial direction at the U-shaped opened end, wherein the rotor accommodating portion and the can skirt It is preferably formed integrally.

Preferably, a carbon bearing is coupled to the other side of the rotor, and the cover can includes a carbon bearing supporting member capable of supporting the carbon bearing, and the cover can is bolted to the body can.

In addition, it is preferable that a carbon bearing is coupled to the other side of the rotor, and the cover can includes a carbon bearing supporting member capable of supporting the carbon bearing, and the cover can is coupled to the body can by ultrasonic welding.

Preferably, the body can has a protrusion for ultrasonic welding, and the cover can has a protrusion groove to be engaged with the protrusion at a position corresponding to the protrusion.

Thus, according to the present invention, there is provided a motorized water pump which can more effectively achieve a waterproof function, can more stably support a rotating rotor, and is simple and convenient in waterproofing the state.

1 is a perspective view of an electric water pump according to an embodiment of the present invention,
2 is a sectional view of the electric water pump,
Figure 3a is a perspective view of one embodiment of the can sealing portion of Figure 1,
Figures 3b, 3c and 3d are sectional views of Figure 3a. A plan view, and a cross-
FIG. 4A is a perspective view according to another embodiment of the can sealing portion of FIG. 1, FIG.
Figs. 4B, 4C and 4D are cross-sectional views of Fig. 4A. Fig. A plan view and a cross-sectional view of the assembly.

Hereinafter, an embodiment of an electric water pump 100 (hereinafter, referred to as 'water pump') having a waterproof structure according to the present invention will be described with reference to FIGS. 1 to 4D.

1 is a perspective view of an electric water pump according to an embodiment of the present invention, Fig. 2 is a sectional view of an electric water pump, Fig. 3a is a perspective view according to an embodiment of the can sealing portion of Fig. 1, And Fig. 3d is a sectional view of Fig. 3a. FIG. 4A is a perspective view according to another embodiment of the can sealing portion of FIG. 1, and FIGS. 4B, 4C, and 4D are sectional views of FIG. A plan view and a cross-sectional view of the assembly.

1 and 2, a water pump 100 according to an embodiment of the present invention includes a housing body 133 and a housing 135 having a housing cover 135 coupled to the housing body 133 130); A motor module 150 including a stator 151 fixed to the housing 130 and a rotor 153 rotatable by an electromagnetic force of the stator 151; An impeller 170 combined with the motor module 150 to pressurize the fluid sucked in the suction port 113 and apply a centrifugal force to the fluid to discharge the fluid to the discharge port 115; And a can sealing portion 190 coupled to the housing 130 to seal between the rotor 153 and the stator 151 and to support the rotor 153, A body can 193 that receives the rotor 153 and supports one side of the rotor 153 and a cover can 195 that is coupled to the body can 193 to support the other side of the rotor 153 ).

The suction port (113) and the discharge port (115) are formed in the housing cover (135).

The housing 130 preferably includes a material such as plastic that is excellent in corrosion resistance and can reduce weight. The housing 130 includes a housing main body 133 for housing and supporting the motor module 150, And a housing cover 135 for housing the impeller 170 to form a passage for the fluid. The housing body 133 and the housing cover 135 may include bolts and nuts .

The motor module 150 is housed in and supported by the housing 130 and is located at the center of the rotor 153 and the rotor 153 which are the rotating parts of the motor module 150, And a carbon bearing 155 for rotatably supporting the rotating shaft 157 and the rotating shaft 157 having the rotating shaft 157 (see CL).

In addition, the motor module 150 includes a connector 158b to which an external power source and an electric wire for transmitting / receiving various signals related to control can be coupled, and a circuit board 158a for controlling signals transmitted and received Respectively.

The rotor 153, the rotating shaft 157, the carbon bearing 155 and the like which are rotating parts of the motor module 150 are in contact with water and other stator 151, circuit board, The can sealing portion 190, which will be described later, separates the stator 151 and the rotor 153 from each other to prevent moisture from penetrating into the stator 151 side.

The impeller 170 is made of a material including a synthetic resin material that is coupled to the rotating shaft 157 by a rotating shaft 157 and an impeller fastening 173 and is made of plastic so as to pressurized water introduced through the inlet 113, (115).

The can sealing portion 190 includes a U-shaped rotor receiving portion 193a for receiving and supporting the rotor 153 and a can skirt 193b extending in the radial direction from the U- A can 193 and a cover can 195 that is coupled to the body can 193 and supports the outer side of the rotor 153 to prevent moisture from penetrating into the stator 151 side. On the other hand, a bearing support member 195b for rotatably supporting one side of the rotor 153 is formed inside the cover can 195, and a portion for rotatably supporting the other side of the rotor 153 is not shown And is formed at the inner bottom of the U-shaped groove of the body can 193.

Here, a method in which the cover can 195 is engaged with the body can 193 is accomplished by a fastening screw member 195d including a bolt. That is, the fastening screw member 193d is fastened to the body can 193 with a cover can 195 in the fastening screw groove 195e formed in the body can 193 through the fastening groove 193c formed in the cover can 195 .

On the other hand, the protruding portion of the shape of the cover can 195 that protrudes upward from the upper surface of the cover can 195 in the circumferential direction and protrudes in the circumferential direction, functions as a guide for guiding the fluid in the process of rotating the sucked fluid, A stable and efficient flow can be induced.

It is possible to stably support the rotor 153 by preventing water or the like from moving toward the stator 151 side from the rotor 153 side through the can sealing portion 190 having such a structure, Able to know. Assembly and disassembly work is simple and convenient while the number of parts is small.

4A to 4D, the water pump 200 according to another embodiment of the present invention includes a body can 293 and a cover can 295 coupled to each other at a can sealing portion 290, .

That is, in this embodiment, the body can 293 and the cover can 295 are combined by ultrasonic welding. A protrusion 293c is formed in a body can 293 of a plastic can body cans 293 and a cover can 295. The protrusion 293c is formed in the cover can 195 at a position corresponding to the protrusion 293c, And a protruding groove 295c to be matched with the protrusion 293c.

When the cover can 295 is coupled to the body can 293, the protrusion 293c is engaged with the protrusion groove 295c, and the protrusion 293c is melted with the protrusion groove 295c through ultrasonic welding, The cover can 295 can be engaged with the cover can 295.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the invention. will be. The scope of the invention will be determined by the appended claims and their equivalents.

100: water pump 113: inlet
115: discharge port 130: housing
133: housing body 135: housing cover
150: motor module 151:
153: rotor 155: carbon bearing
157: rotating shaft 158a: circuit board
158b: Connector 170: Impeller
173: Impeller fastening bolt 190: Can sealing part
193: Body can 193a:
193b: can skirt 193c: fastening groove
195: cover can 195b: bearing supporting member
195d: fastening screw member 195e: fastening screw groove
293c: projection 295c: projection groove

Claims

In the electric water pump,
A housing;
A motor module including a stator fixedly supported on the housing, and a rotor rotatable by an electromagnetic force of the stator;
An impeller which is coupled to the motor module and pressurizes the fluid sucked in the suction port and discharges the fluid to the discharge port;
And a can sealing portion coupled to the housing to seal between the rotor and the stator and to support the rotor,
Wherein the can sealing portion includes a body can that accommodates the rotor and supports one side of the rotor and a cover can coupled to the body can to support the other side of the rotor.

The method according to claim 1,
The body can includes a U-shaped rotor accommodating portion for accommodating and supporting the rotor, and a can skirt extending radially from the U-shaped opened end, wherein the rotor accommodating portion and the can skirt are integrally formed Wherein the water pump is provided with a water pump.

3. The method according to claim 1 or 2,
A carbon bearing is coupled to the other side of the rotor
Wherein the cover can includes a carbon bearing support member capable of supporting the carbon bearing, and the cover can is bolted to the body can.

3. The method according to claim 1 or 2,
A carbon bearing is coupled to the other side of the rotor
Wherein the cover can includes a carbon bearing supporting member capable of supporting the carbon bearing, and the cover can is coupled to the body can by ultrasonic welding.

5. The method of claim 4,
The body can has a protrusion for ultrasonic welding,
Wherein the cover can has a projection groove formed at a position corresponding to the projection so that the projection engages with the projection.