WO2020145436A1

WO2020145436A1 - Water pump

Info

Publication number: WO2020145436A1
Application number: PCT/KR2019/000387
Authority: WO
Inventors: 동근오
Original assignee: 명화공업주식회사; 주식회사 세턴; 승일테크 유한회사
Priority date: 2019-01-10
Filing date: 2019-01-10
Publication date: 2020-07-16

Abstract

The present invention provides a water pump comprising: a housing: an impeller which is provided on one side of the housing, and which causes cooling water to flow and be discharged by means of rotation; a controller provided at the other side of the housing; a rotary shaft of which one end portion is coupled to the center of the impeller and the other end portion is disposed at the controller side, and which rotates the impeller; a stator including a core disposed so as to encompass the radial outer side of a rotor, and a coil which is wound around the outer side of the core and of which the outer surface is made from an insulating material, and being accommodated in an accommodation space of the housing, into which the cooling water flows, so as to be cooled by means of the cooling water; and the rotor coupled to the outer peripheral surface of the rotary shaft and rotated by means of the stator.

Description

Water pump

The present invention relates to a water pump, and more particularly, to a water pump for forcibly circulating the sucked coolant into the engine to cool the electrical components inside the vehicle.

In general, a water pump means a pump that circulates cooling water into the engine forcibly and cools the vehicle interior. Engines that obtain power by using the explosive power of fuel, such as automobile engines, generate high-temperature heat during operation. If this is not properly controlled, it will adversely affect the engine itself as well as other adjacent engines. Therefore, cooling water is essential as a means for cooling the heat.

As related to such a water pump, the Korean Patent Application No. (Application No. 10-2016-0151158) discloses a water pump.

The conventional water pump includes an impeller for sucking and discharging cooling water, a rotor for rotating the impeller, and a stator including a core wound around the core and a coil wound on the outside of the core. In addition, the conventional water pump, instead of having a can between the rotor and the stator, further includes a stator support injection part surrounding the stator. Accordingly, the conventional water pump, by allowing the cooling water to flow along the inner circumferential surface of the stator support injection portion, to fundamentally block the stator from directly contacting the cooling water.

At this time, the conventional water pump, there is a limitation that the coolant flowing into the inside does not directly contact the stator, so that the stator is not sufficiently cooled. In this case, since the stator may be thermally damaged by the heat transfer of the coil, the conventional water pump is designed to maintain a large diameter of the coil in order to reduce the resistance size of the coil.

As such, when the diameter of the coil increases, the size of the core around which the coil is wound and the housing in which the stator is accommodated must be increased, and consequently, the height of the entire water pump should be designed to increase. Therefore, the conventional water pump has a problem in that too much cost is generated in manufacturing the product.

The present invention was created to solve the above problems, and has an object to provide a water pump that improves the cooling structure of the stator to improve the cooling effect of the stator, thereby reducing the manufacturing cost of the product.

The present invention, the housing; An impeller installed on one side of the housing to flow in and out cooling water by rotation; A controller installed on the other side of the housing; One end is coupled to the center of the impeller, the other end is disposed on the controller side, a rotating shaft for rotating the impeller; A core disposed to surround the radially outer side of the rotor, and a coil wound on the outer side of the core and made of an insulating material, is accommodated in a receiving space of the housing through which cooling water flows, and cooled by the cooling water It provides a water pump including a stator, and is coupled to the outer circumferential surface of the rotating shaft and includes a rotor rotating by the stator.

The stator is interposed between the core and the coil, the coil is wound on an outer surface, and the bobbin wraps the outer surface of the core to fix the core to the inner circumferential surface of the housing, and the rotor side ends of the bobbin, respectively. It may be disposed to face the impeller and the controller to prevent the coil from deviating from the bobbin, and may further include a pair of support ends disposed to be spaced apart from the impeller, the controller and the housing.

The coil may include a copper wire and a plurality of urethane coating layers covering the outer peripheral surface of the copper wire.

The rotor is arranged to be spaced apart from the controller, and the coolant flowing into the accommodation space may be supplied to the controller through an air gap between the rotor and the stator.

The stator is spaced apart from the impeller and the controller with the bobbin interposed therebetween, interposed between the bobbin and the coil, and a pair of curves formed such that surfaces facing the coil form convex curved surfaces toward the impeller and the controller, respectively. It may further include a member.

According to the water pump according to the present invention, the cooling effect of the stator can be improved by bringing the stator into direct contact with the cooling water introduced into the inside. Therefore, according to the water pump according to the present invention, the diameter of the coil can be kept small, thereby reducing the size of the entire water pump, thereby reducing the manufacturing cost of the product.

1 is a cross-sectional view of a water pump according to an embodiment of the present invention.

2 is a cross-sectional view of a coil included in a water pump according to an embodiment of the present invention.

3 is a cross-sectional view showing a state in which a curved member included in a water pump according to an embodiment of the present invention is interposed between a coil and a bobbin.

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

Referring to Figure 1, the water pump 100 according to an embodiment of the present invention, the housing 110, the impeller 120, the controller 130, the rotating shaft 140, the rotor 150 and the stator 160 ).

The housing 110, as a cylindrical member, accommodates the rotating shaft 140, the rotor 150 and the stator 160 therein. In addition, a portion of the cooling water introduced by the impeller 120 is introduced into the housing 110. The impeller 120 is installed on one side of the housing 110 and sucks cooling water by rotation. In addition, the impeller 120 applies pressure to the sucked coolant to supply coolant to an engine or the like inside the vehicle, so that the coolant circulates through the engine or the like. At this time, the impeller 120 supplies some of the sucked cooling water to the accommodation space 111 formed inside the housing 110.

The controller 130 is installed on the other side of the housing 110. The controller controls the current supplied to the stator, or controls the angular displacement and rotation angle of the rotor. The rotating shaft 140 is installed to penetrate the center of the housing 110, one end is coupled to the center of the side of the housing 110 of the impeller 120, the other end is the controller 130 It is arranged to face. And the rotating shaft 140 is rotated by the rotor 150 to rotate the impeller 120.

The rotor 150 is coupled to the outer circumferential surface of the rotating shaft 140. In addition, the rotor 150 rotates through magnetic action with the stator 160 to rotate the rotating shaft 140 and the impeller 120. The stator 160 is fixed to the inner circumferential surface of the housing 110 so as to surround the radially outer side of the rotor 150. In addition, the stator 160 forms a magnetic field through electric power supplied from the outside, and rotates the rotor 150 accordingly.

At this time, the stator 160 is formed so that the side surfaces of the impeller 120 and the controller 130 side open toward the accommodation space 111 so as to directly contact the cooling water introduced into the housing 110. Can be.

When the stator 160 is described in more detail, the stator 160 is a kind of solenoid structure, and includes a core 161, a bobbin 162, a coil 163, and a pair of support ends 164. And a pair of curved members 165.

The core 161 is a member made of metal and is disposed to surround the radially outer side of the rotor 150. In addition, the core 161 is disposed at the center of the coil 163 to increase the magnetization rate of the magnetic flux generated by the coil 163. Accordingly, the core 161 allows the strength of the magnetic field formed by the coil 163 to be amplified.

The bobbin 162 surrounds the outer surface of the core 161 and fixes the core 161 to the inner circumferential surface of the housing 110. At this time, the bobbin 162 and the housing 110 may be formed to be integral, and the bobbin 162 may be fixed to the housing 110 through a separate fixing member (not shown).

The coil 163 is wound on the outer surface of the bobbin 162, and forms a magnetic field through a current supplied from the outside. At this time, the coil 163, as shown in Figure 1, the impeller 120 and the controller 130 is disposed on the side of the portion toward the receiving space 111 to open. And the coil 163 is cooled by direct contact with the cooling water flowing into the receiving space 111.

If, like a conventional water pump, a can is provided between the rotor and the stator, or a stator support injection part covering the stator is provided inside the housing, so that the coil does not directly contact the cooling water, the The coil is not cooled sufficiently. Therefore, in this case, in order to reduce the amount of heat generated in the resistance of the coil, the coil must be kept large in diameter.

When the diameter of the coil is increased as described above, the size of the core and bobbin around which the coil is wound must be increased, and the housing for accommodating the stator must be increased, and accordingly the size of the water pump as a whole must be increased. Therefore, according to the conventional water pump, there is a problem in that too much cost must be consumed to manufacture the water pump.

However, as with the water pump 100 according to an embodiment of the present invention, the coil 163 is arranged to open toward the receiving space 111 so that it directly contacts the cooling water flowing into the receiving space 111, The coil 163 may be sufficiently cooled by cooling water. In this case, there is no need to keep the diameter of the coil 163 large, so the size of the coil 163 can be reduced, and accordingly, the overall size of the water pump 100 can be reduced to reduce the manufacturing cost of the product. .

In this way, the coil 163 may be made of an insulating material on the outer surface so that the coil 163 can be in direct contact with the cooling water. More specifically, referring to FIG. 2, the coil 163 is composed of a plurality of urethane coating layers 163b covering the copper wire 163a constituting the center of the coil 163 and the outer circumferential surface of the copper wire 163a. It can be done. As described above, the urethane coating layer 163b forms a plurality of layers in the radial direction of the copper wire 163a, thereby preventing the copper wire 163a from being contacted with cooling water.

The pair of support ends 164 are disposed so as to face the impeller 120 and the controller 130 side from the rotor 150 side end of the bobbin 162, respectively, so that the coil 163 is It is prevented from deviating from the bobbin 162. At this time, the pair of support ends 164 may be arranged so that the ends are spaced apart from the impeller 120, the controller 130 and the housing 110. That is, the pair of support ends 164 may be disposed so as not to contact with any configuration other than the bobbin 162 and the coil 163.

If the end of the support end 164 is in contact with any one of the impeller 120, the controller 130 and the housing 110, the cooling water introduced into the interior of the housing 110 is the coil 163 ) Side. Accordingly, the coil 163 may not directly contact the cooling water.

However, like the water pump 100 according to an embodiment of the present invention, the end of the support end 164 is opened so that coolant flows into the coil 163 side, so that the impeller 120 of the coil 163 And a side portion of the controller 130 directly contacting the cooling water.

Meanwhile, the rotor 150 may be disposed to be spaced apart from the controller 130. In addition, an air gap 112 may be formed between the rotor 150 and the stator 160. In this case, the cooling water supplied to the accommodation space 111 is supplied to the controller 130 side through the air gap 112, and the cooling water supplied to the controller 130 side is the cooling water of the controller 130. The controller 130 is brought into contact with the front surfaces of the opposing surfaces of the rotor 150 and the stator 160 to cool the controller 130.

If, like a conventional water pump, a can is provided between the rotor and the stator, or a stator support injection part covering the stator is provided in the housing, the cooling water supplied to the controller through the air gap is , Of the opposing surfaces of the rotor and the stator side of the controller, only a portion adjacent to the rotation axis is contacted. In this case, it is necessary to increase the size of the controller in order to increase the cooling area of the controller, and accordingly, a problem that the cost consumed for manufacturing the water pump increases.

However, like the water pump 100 according to an embodiment of the present invention, a can is not provided between the rotor 150 and the stator 160, and the rotor 150 is spaced from the controller 130. When arranged as possible, the cooling water supplied to the controller 130 through the air gap 112 makes contact with the front surfaces of the opposing surfaces of the rotor 150 and the stator 160 of the controller 130. do. In this case, since the cooling area of the controller 130 is increased, the size of the controller 130 can be reduced, and accordingly, the manufacturing cost of the product can be reduced.

Meanwhile, referring to FIG. 3, the pair of curved members 165 is interposed between the bobbin 162 and the coil 163, and the impeller 120 and the controller are disposed with the bobbin 162 therebetween. They are spaced apart from each other on the 130 side. In addition, the pair of curved members 165 are formed to protrude so that surfaces in contact with the coil 163 form convex curved surfaces toward the impeller 120 and the controller 130, respectively.

If such a curved member 165 is not provided, the coil 163 may be bent to form a predetermined angle when being wound on the outer surface of the bobbin 162. In this case, a crack in the urethane coating layer 163b may occur at the bent portion, and cooling water may be introduced into the coil 163.

However, as in the water pump 100 according to an embodiment of the present invention, the curved member 165 is provided between the coil 163 and the bobbin 162, so that the coil 163 follows the curved member 165. It can be bent to form a gentle curved surface, it is possible to prevent the generation of cracks in the coil (163).

Claims

housing;

An impeller installed on one side of the housing to flow in and out cooling water by rotation;

A controller installed on the other side of the housing;

One end is coupled to the center of the impeller, the other end is disposed on the controller side, a rotating shaft for rotating the impeller;

A core disposed to surround the radially outer side of the rotor, and a coil wound on the outer side of the core and made of an insulating material, is accommodated in a receiving space of the housing through which cooling water flows, and cooled by the cooling water Includes a stator,

A water pump including a rotor coupled to the outer circumferential surface of the rotating shaft and rotating by the stator.
The method according to claim 1,

The stator,

A bobbin interposed between the core and the coil, the coil being wound on an outer surface, and surrounding the outer surface of the core to fix the core to the inner circumferential surface of the housing;

A pair of support stages arranged to face the impeller and the controller side from the rotor side end of the bobbin, respectively, to prevent the coil from deviating from the bobbin, and the ends are spaced apart from the impeller, the controller and the housing. A water pump further comprising.
The method according to claim 2,

The coil is a water pump including a copper wire and a plurality of urethane coating layers covering an outer circumferential surface of the copper wire.
The method according to claim 2,

The rotor is spaced apart from the controller,

The cooling water flowing into the receiving space is supplied to the controller through an air gap between the rotor and the stator.
The method according to any one of claims 2 to 4,

The stator,

Further comprising a pair of curved members interposed between the bobbin and the controller, the interposed between the bobbin and the coil, and the surfaces in contact with the coil to form convex curved surfaces respectively to the impeller and controller with the bobbin interposed therebetween. Water pump.