Water pump

Patent metadata

Field	Value
Publication number	US-12012968-B2
Application number	US-202318366313-A
Country	US
Kind code	B2
Filing date	Aug 7, 2023
Priority date	Aug 10, 2022
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

The present disclosure relates to a water pump in which a channel is formed so that a fluid introduced through an inlet side passes through a bearing part and a channel inside the rotor accommodation part and the rotor is formed so that the fluid may circulate, so a lubricating action of a bearing rotatably coupled to the rotor is smoothed and a pressure difference between upper and lower sides of an assembly of the rotor and an impeller assembly is reduced, thereby reducing abnormal noise and vibration in the bearing part.

First claim

What is claimed is:

1. A water pump, comprising:
a lower casing in which a rotor accommodation part having a rotor accommodation space formed to be recessed from an upper surface to a lower side protrudes downward, a lower bearing mounting part is formed at an inner lower end of the rotor accommodation part, and a lower bearing is coupled to an inside of the lower bearing mounting part;
an upper casing coupled to an upper side of the lower casing, having an impeller accommodation space therein by coupling with the lower casing, having an inlet part communicating with the impeller accommodation space to have a fluid be introduced thereinto and an outlet part through which the fluid is discharged, having an upper bearing mounting part extending from the inlet part, and having an upper bearing coupled to an inside of the upper bearing mounting part;
an impeller provided to be rotatable in the impeller accommodation space; and
a rotor provided in the rotor accommodation space of the lower casing, coupled to the impeller, and having both ends of a rotary shaft rotatably coupled to the lower bearing and the upper bearing,
wherein the upper bearing mounting part is provided with a cooling hole vertically penetrating through the inside and outside of the upper bearing mounting part,
wherein the rotor is provided with a communication channel penetrating up and down, and an inlet side of the impeller coupled to an upper end of the rotor and a lower end side of the rotor communicate with each other by the communication channel.

2. The water pump of claim 1 , wherein the rotor accommodation part of the lower casing is provided with a communication groove formed to be recessed on an inner circumferential surface along a vertical direction.

3. The water pump of claim 1 , wherein the rotor accommodation part is provided with a lower cooling channel communicating with the inside of the lower bearing mounting part at an outer lower end of the lower bearing mounting part.

4. The water pump of claim 1 , wherein the upper casing further includes a plurality of supporting stands having an upper end connected to a lower inner wall of the inlet part and a lower end connected to the upper bearing mounting part, and
the upper bearing mounting part extends from a lower end of the inlet part toward the impeller accommodation space.

5. The water pump of claim 4 , wherein a portion or all of the upper bearing mounting part is disposed inside an inlet side of the impeller.

6. The water pump of claim 5 , wherein the lower end of the inlet side of the impeller and an upper end of the rotor are provided with an insertion groove formed to be recessed downward, and
the upper bearing mounting part is inserted into the insertion groove and spaced apart therefrom.

7. The water pump of claim 6 , wherein the rotor is provided with a communication channel connecting a lower end side of the rotor and the insertion groove through the top and bottom thereof.

8. The water pump of claim 1 , further comprising:
a motor housing formed in a shape of a concave container with an upper side open; and
a stator provided inside the motor housing.

9. The water pump of claim 8 , wherein a protruding rib is formed on an outer circumferential surface of the rotor accommodation part of the lower casing along a vertical direction, and the protruding rib is inserted between adjacent teeth of the stator, and
a communication groove is formed to be recessed on an inner circumferential surface along the vertical direction at a position corresponding to the protruding rib.

Assignees

• Coavis

Inventors

• Lee Hyuntae
• Kim Hyungmin
• Lee Wookeun
• Mo Dongheon

Classifications

• F04D1/00

  Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D7/00; priming or boosting F04D9/00) · CPC title

• F04D29/4293

  Details of fluid inlet or outlet · CPC title

• F04D29/22

  specially for centrifugal pumps · CPC title

• F05D2210/11

  liquid, i.e. incompressible · CPC title

• F04D13/0606

  Canned motor pumps · CPC title