KR20170061913A

KR20170061913A - Water pump

Info

Publication number: KR20170061913A
Application number: KR1020150167078A
Authority: KR
Inventors: 도민훈; 박진우; 황양호; 김형규
Original assignee: 지엠비코리아 주식회사
Priority date: 2015-11-27
Filing date: 2015-11-27
Publication date: 2017-06-07

Abstract

The present invention relates to a water pump, and more particularly, to a water pump that has high durability and can reduce flow loss.
The water pump according to the present invention includes an impeller having a shroud formed with a through hole through which a fluid flows in a central portion, an inlet for guiding the fluid through the through hole, and a discharge port for guiding the fluid discharged by the impeller, Wherein the impeller is formed with a protrusion in which the shroud protrudes from an outer circumferential surface of the through-hole, and the impeller cover has a groove in which the protrusion is inserted so that the inlet may cover the protrusion, .
According to the present invention, the impeller has a protrusion formed by protruding the shroud on the outer circumferential surface of the through hole, and the impeller cover has a groove in which the protrusion is inserted so that the inlet can cover the protrusion, Can be reduced.

Description

Water pump {Water pump}

The present invention relates to a water pump, and more particularly, to a water pump that has high durability and can reduce flow loss.

Generally, a water pump is a device for circulating cooling water to an engine and a heater for cooling the engine and heating the room. The cooling water discharged from the water pump exchanges heat with the engine, the heater, or the radiator, circulates, and then flows back to the water pump. These water pumps are largely divided into mechanical water pumps and electric water pumps.

Fig. 4 shows an electric water pump disclosed in the prior art No. 10-1244083.

4, when the impeller 30 is rotated by the rotor 20, the fluid flows into the through hole 32 of the shroud 31 through the inlet 11. The fluid flowing through the inlet port (11) flows out to the outlet port (12) by the impeller (30). At this time, the fluid flowing through the inlet 11 passes through the gap a between the impeller 30 and the impeller cover 10, and a flow loss occurs.

Registration No. 10-1252357 (registered on Apr. 2, 2013) Registration No. 10-1072328 (registered date October 5, 2011) Registration No. 10-1244083 (registered on March 8, 2013)

The present invention is intended to solve the above problems. SUMMARY OF THE INVENTION It is an object of the present invention to provide a water pump that reduces the loss of flow rate between an impeller cover and an impeller.

The water pump according to the present invention includes an impeller having a shroud formed with a through hole through which a fluid flows in a central portion, an inlet for guiding the fluid through the through hole, and a discharge port for guiding the fluid discharged by the impeller, Wherein the impeller is formed with a protrusion in which the shroud protrudes from an outer circumferential surface of the through-hole, and the impeller cover has a groove in which the protrusion is inserted so that the inlet may cover the protrusion, .

According to the present invention, the impeller has a protrusion formed by protruding the shroud on the outer circumferential surface of the through hole, and the impeller cover has a groove in which the protrusion is inserted so that the inlet can cover the protrusion, Can be reduced.

1 is a sectional view of an embodiment of a water pump according to the present invention,
FIG. 2 is a cross-sectional view of the impeller and the impeller cover shown in FIG. 1,
3 is an exploded perspective view of the impeller and the impeller cover shown in FIG. 1,
4 is a cross-sectional view of a conventional water pump.

1 to 3, an embodiment of a water pump according to the present invention will be described.

The water pump according to the present invention includes a housing 110, a can 115, a rotor 120, a stator 125, a rotating shaft 130, an impeller 135, and an impeller cover 145 do.

The housing 110 houses the can 115, the rotor 120, and the stator 125 therein. The rotor 120 is installed on the inner diameter side of the can 115, and is fixedly coupled to the rotating shaft 130 and rotated. The stator 125 is fixed to the outer diameter side of the can 115 and rotates the rotor 120 according to an electrical signal. The rotary shaft 130 is mounted inside the can 115 and the lower end thereof is fixed to the lower center.

The impeller 135 serves to circulate the fluid introduced into the water pump. To this end, the impeller 135 has a shroud 136 and is mounted on a rotary shaft 130 protruding out of the can 115 to be rotatable by the rotor 120. The shroud 136 is formed with a through hole 137 through which a fluid flows into the center thereof and a protrusion 139 protruding from the outer circumferential surface of the through hole 137.

The impeller cover 145 has an inlet 146 and an outlet 149 and is coupled to the upper portion of the housing 110 to enclose the impeller 135. The inlet 146 serves to guide the fluid to the through hole 137 and a groove 147 into which the protrusion 139 is inserted to cover the protrusion 139 is formed. The discharge port 149 serves to guide the fluid discharged by the impeller 135.

However, in the present embodiment, when the impeller cover 145 is coupled to the upper portion of the housing 110 to enclose the impeller 135 mounted on the rotary shaft 130, the protrusion 139 of the shroud 136 contacts the impeller cover 145 As shown in Fig. The impeller 135 rotates to reduce the flow loss of the fluid flowing through the inlet 146 into the gap b between the impeller 135 and the impeller cover 145.

In this embodiment, when the impeller 135 is rotated by the rotor 120, the fluid flows into the through hole 137 of the shroud 136 along the direction of the arrow A through the inlet 146, And flows out through the discharge port 149 in the direction of the arrow B. At this time, a part of the fluid flowing through the inlet 146 collides with the inner surface 140 of the protrusion 139 of the shroud 136 and the inner wall 148 of the groove 147 of the impeller cover 145, . At this time, the fluid flowing along the arrow C is disturbed by the protrusion 139 of the shroud 136 and the groove 147 of the impeller cover 145. Therefore, unlike the conventional case, the amount of flow escaping to the gap b between the impeller 135 and the impeller cover 145 is reduced.

In the present embodiment, it is used in an electric water pump, but it can also be used in a mechanical water pump.

110: housing 115: cans
120: rotor 125: stator
130: rotating shaft 135: impeller
136: Shroud 137: Through hole
139: protrusion 140: inner side
145: impeller cover 146: inlet
147: Home 148: Inner wall
149: Outlet

Claims

And an impeller cover having an inlet for guiding the fluid through the through hole and an outlet for guiding the fluid discharged by the impeller, the impeller covering the impeller, wherein the impeller includes a shroud having a through- In the water pump,
Wherein the impeller has a protrusion formed by protruding the shroud on an outer peripheral surface of the through hole,
Wherein the impeller cover is formed with a groove into which the protrusion is inserted so that the inlet can cover the protrusion.