CN116146528A

CN116146528A - Water pump and impeller for water pump

Info

Publication number: CN116146528A
Application number: CN202211456135.XA
Authority: CN
Inventors: 李弦泰; 裵完成; 李宇根
Original assignee: Corbis Co ltd
Current assignee: Corbis Co ltd
Priority date: 2021-11-19
Filing date: 2022-11-21
Publication date: 2023-05-23
Also published as: US20230160394A1

Abstract

The present invention relates to a water pump and an impeller for a water pump, the impeller for a water pump comprising: a main plate, and a plurality of blades formed on one surface of the main plate and arranged to be spaced apart from each other along a circumferential direction of the main plate; the intervals between the plurality of blades arranged at intervals are unequal intervals different from each other, so that noise generated when the impeller rotates can be reduced by a simple structure.

Description

Water pump and impeller for water pump

Technical Field

The present invention relates to a water pump and an impeller for a water pump, which is coupled to a driven rotation shaft to press fluid by a rotation force.

Background

The water pump is a device for circulating cooling water in an engine or a heater for cooling the engine, warming the room, or the like. These pumps are roughly classified into mechanical pumps and electric pumps.

The mechanical water pump is a pump that is connected to a crankshaft of the engine and driven in accordance with rotation of the crankshaft, and the electric water pump is a pump that is driven by rotation of a motor controlled by a control device.

The electric water pump is mainly composed of a casing, a stator, a rotor, and an impeller housing, which constitute a motor. The stator is provided inside the housing, fixed to the housing, a rotor is provided at an inner side of the stator at a distance, an impeller is coupled to a rotation shaft of the rotor, and an impeller housing is coupled to the housing so as to cover the impeller. Whereby fluid is forced through rotation of the impeller.

However, since a plurality of blades are generally arranged at equal intervals with respect to the impeller of the water pump, when the water pump is operated to pump fluid, noise generated by rotation of the impeller is large.

Prior art literature

Patent literature

Korean patent publication No. 10-2017-0046238A (2017, 5, 2)

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an impeller for a water pump, which can reduce noise generated when the impeller rotates.

Means for solving the problems

An impeller for a water pump according to the present invention for achieving the above object includes: a main plate, and a plurality of blades formed on one surface of the main plate and arranged to be spaced apart from each other along a circumferential direction of the main plate; the intervals between the plurality of blades arranged at intervals may be formed at unequal intervals different from each other.

Further, the blade separation interval between the plurality of blades of the spaced arrangement may be an angle between tips of the plurality of blades of the spaced arrangement.

Further, the spacing of the blades adjacent to each other may be different.

Furthermore, the blade separation intervals may all be different.

Further, among the plurality of blades, the blades facing each other with respect to the center of the main plate may be different from each other with respect to the interval.

Further, the blades may be irregularly arranged at intervals.

Further, the plurality of blades may be formed to have different degrees of curvature from each other.

Further, the plurality of blades may be formed to have different thicknesses from each other.

In addition, when the number of the blades is N and the blade interval is A,

the blades may be disposed at intervals within an angular range satisfying the following formula 1,

equation 1:

the water pump of the present invention may be configured to include: a motor housing in the form of a container with an open upper side; a stator disposed inside the motor housing; a lower case coupled to an upper side of the motor housing, the lower case having a rotor receiving part protruding downward, the rotor receiving part having a rotor receiving space recessed downward from an upper surface of the lower case, the rotor receiving part being inserted into an inner side of a stator; an upper housing coupled to an upper side of the lower housing, an impeller accommodating space being formed inside by coupling with the lower housing, and an inlet portion communicating with the impeller accommodating space to allow fluid to flow in and an outlet portion to allow fluid to be discharged being formed at the upper housing; the impeller for a water pump is rotatably provided at the impeller receiving space, and a rotor is rotatably provided at the rotor receiving space of the lower housing and coupled to the impeller.

In addition, the impeller for a water pump may further include a lower plate coupled to the plurality of blades from a side opposite to a side where the main plate is located, the main plate and the plurality of blades of the impeller for a water pump may be integrally formed, and the lower plate and the rotor may be integrally formed.

In the impeller for a water pump, a through hole penetrating both surfaces may be formed in the center of the main plate.

ADVANTAGEOUS EFFECTS OF INVENTION

The impeller for a water pump of the present invention has an advantage that noise generated when the impeller rotates can be reduced by a simple configuration in which the interval between the blade rows is changed.

Drawings

Fig. 1 to 3 are perspective, upper and lower plan views illustrating an impeller for a water pump according to an embodiment of the present invention.

Fig. 4 is a plan view showing a conventional equally spaced impeller with the blades spaced apart all the same.

Fig. 5 is a plan view illustrating a non-equally spaced impeller in which the vane-spaced intervals are different from each other according to an embodiment of the present invention.

Fig. 6 is a noise measurement diagram of a water pump using the conventional equally spaced impeller of fig. 4.

Fig. 7 is a diagram of noise measurements of a water pump using the non-equally spaced impeller of the present invention of fig. 5.

Fig. 8 is data showing noise of a water pump using the conventional equally spaced impeller of fig. 4 and a water pump using the non-equally spaced impeller of the present invention of fig. 5.

Fig. 9 is data for testing the performance of a water pump using a conventional equally spaced impeller and the performance of a water pump using a non-equally spaced impeller of the present invention.

Fig. 10 to 12 are an assembled perspective view, an exploded perspective view, and a front sectional view showing a water pump including an impeller for a water pump according to an embodiment of the present invention.

Description of the reference numerals

100: stator

110: core 120: tooth part

121: pole piece 130: insulation body

140: coil 150: terminal for connecting a plurality of terminals

210: lower shell

211: lower seating groove 212: lower flow channel

220: rotor housing

221: rotor accommodation space 222: lower bearing mounting part

300: motor casing

400: rotor 410: rotary shaft

411: lower bearing 412: upper bearing

B: bushing P: supporting pin

500: impeller 501: through hole

510: motherboard 520: lower plate

530: blade

600: upper shell

601: impeller accommodation space 602: upper bearing mounting part

610: inlet 611: inflow channel

612: support part

620: an outlet portion 621: discharge flow path

630: upper mounting groove 632: an upper flow channel.

Detailed Description

The impeller for a water pump according to the present invention is described in detail below with reference to the accompanying drawings.

As shown, an impeller for a water pump according to an embodiment of the present invention may be configured to mainly include a main plate 510 and a plurality of blades 530.

As described with reference to fig. 1 to 3, the main plate 510 may be formed in a disk shape, for example, and a through hole 501 penetrating both surfaces so as to allow fluid to pass therethrough may be formed in the center. The main plate 510 may have a shape slightly protruding from the radially outer side to the inner side toward the other side (lower side), and the through hole 501 may be formed to extend from the radially inner side end of the main plate 510 toward the other side. In addition, the main board 510 may be formed in various shapes.

The plurality of blades 530 may be formed on one side of the main plate 510, and the plurality of blades 530 may be arranged to be spaced apart from each other along the circumferential direction of the main plate 510. Also, radially inner ends, i.e., root portions, of the plurality of blades 530 may be disposed at a position spaced apart from the center of the main plate 510, and radially outer ends, i.e., tip portions, of the plurality of blades 530 may be disposed at radially outer ends of the main plate 510. In addition, the plurality of blades 530 may be formed in a curved shape curved in one direction from the root to the tip, and the plurality of blades 530 may be formed in a curved plate shape relatively thin with respect to the height thickness. Further, the plurality of blades 530 may be formed in various shapes.

Here, the plurality of blades 530 may be formed at unequal intervals, wherein the intervals between the blades 530 spaced apart from each other are different from each other. For example, when the spacing between the plurality of blades 530 in the spaced apart arrangement is referred to as a blade spacing interval, the blade spacing interval may be an angle between the tips of the plurality of blades 530 in the spaced apart arrangement. That is, the blade intervals of any adjacent two blades 530 are different from each other. In other words, at least one of the blade separation intervals may be formed to be different from the remaining blade separation intervals.

Therefore, when the impeller for a water pump of the present invention is used for a water pump and operates to pump fluid, a part of frequency components of noise generated by the respective blades do not overlap when the impeller rotates, so that noise can be reduced.

In addition, the impeller for a water pump of the present invention may be formed such that the blades adjacent to each other are different from each other in interval. That is, as shown, the adjacent two blades are formed to be different from each other in terms of the separation angle. Therefore, it is possible to further reduce the overlap between the frequency components of the noise generated by the respective blades when the impeller rotates.

In addition, the impeller for a water pump of the present invention may be formed such that the vane intervals are all different. That is, all the blade-spaced intervals may be formed to be different from each other. For example, as shown, when the blades are set to A1 to A9 at intervals, A1 to A9 may be formed at different angles. In addition, the vane interval may be randomly formed without particular regularity.

Therefore, when the impeller for a water pump of the present invention is used for a water pump and operated to pump fluid, frequency components of noise generated by the respective blades do not overlap when the impeller rotates, so that noise can be remarkably reduced.

Further, among the plurality of blades 530, the blades facing each other with respect to the center of the main plate 510 may be formed to be different from each other with a space therebetween. For example, the blade-spaced intervals A5 and A6 located on opposite sides of the arbitrary blade-spaced interval A1 may be formed in different manners from A1, respectively.

Therefore, when the impeller for a water pump of the present invention is used for a water pump and operated to pump fluid, noise components corresponding to half the number of rotations of the impeller are not overlapped when the impeller rotates, so that noise can be reduced.

In addition, the plurality of blades 530 may be formed to have different degrees of bending from each other, or the plurality of blades 530 may be formed to have different thicknesses from each other. That is, in a state where the arrangement angles of the blades 530 are the same, it may be formed that the degrees of bending are different from each other, or that the thicknesses of the blades 530 are different from each other, thereby changing the tip positions of the blades 530. Therefore, the blades can be made different from each other in the interval.

In addition, when the number of the blades 530 is N and the blade interval is A, the blade interval may be formed within an angle range satisfying the following equation 1,

equation 1:

in which if the vane interval a exceeds the range of the above formula 1, pulsation and vibration of the water pump are increased and efficiency is lowered. Therefore, only if the blades are provided at intervals within an appropriate range as shown in the above formula 1, vibration and noise at the time of rotation of the impeller can be reduced, and at the same time, the performance of the water pump using the impeller of the present invention can be ensured.

Fig. 4 is a plan view showing a conventional equally spaced impeller in which the blade-spaced intervals are all the same, and fig. 5 is a plan view showing a non-equally spaced impeller in which the blade-spaced intervals are different from each other according to an embodiment of the present invention. In fig. 4 and 5, the blades are identical in size to each other, the number of blades is also identical to each other, 7 each, and only the blades are different in the interval.

Further, fig. 6 is a noise measurement diagram of a water pump using the conventional equally spaced impeller of fig. 4, fig. 7 is a noise measurement diagram of a water pump using the non-equally spaced impeller of the present invention of fig. 5, and fig. 8 is comparative data of noise of a water pump using the conventional equally spaced impeller and a water pump using the non-equally spaced impeller of the present invention.

As shown in the figure, when the non-equidistant impeller of the present invention was applied, the 7th (7 th) and 14th (14 th) noises of the water pump were reduced as a whole, and particularly, the 7th and 14th noises in the X direction and the 14th noises in the Z direction were significantly reduced, as compared with the conventional equidistant impeller.

Further, fig. 9 is data of water pump performance using a conventional equally spaced impeller and water pump performance using a non-equally spaced impeller of the present invention were tested.

As shown in the figure, when the non-equally spaced impeller of the present invention is applied, it can be confirmed that various performances such as flow rate, pressure of fluid, and current are hardly different for each rotation number, compared with a water pump using a conventional equally spaced impeller. Therefore, the water pump using the non-equally spaced impeller of the present invention has the effect of reducing noise and vibration while sufficiently securing the desired performance.

As shown, the water pump of the present invention may include a motor housing 300, a stator 100, a lower housing 210, an upper housing 600, the impeller 500 for the water pump described above, and a rotor 400.

The motor housing 300 may be formed in a recessed container shape of a metal material, and may be formed in a shape in which the inside is empty and the upper side is opened. The motor case 300 is closed at the lower end, has a cylindrical side surface, and may have a flange protruding radially outward from the outer peripheral surface at the upper end.

The stator 100 may include a core 110, a plurality of teeth 120, an insulator 130, a coil 140, and a plurality of terminals 150. The stator 100 may be a stator used in a general motor, a brushless direct current (brushless direct current, BLDC) motor, or the like, and may be formed in various types.

The lower housing 210 is formed with a lower seating groove 211 downwardly recessed from an upper surface so as to accommodate a portion of the impeller 500, and a recessed lower flow path groove 212 may be formed at a radial outer side of the lower seating groove 211 so that fluid discharged from the impeller 500 may flow. The rotor receiving part 220 may be integrally formed with the lower case 210 by injection molding, and may be formed in a shape protruding downward from a central portion of a portion where the lower seating groove 211 is formed, and may be formed in a recessed container-shaped rotor receiving part 220. In addition, the rotor housing portion 220 is formed with a lower bearing mounting portion 222 at a lower bottom of the rotor housing space 221, and the lower bearing 411 may be coupled with the lower bearing mounting portion 222. Here, the lower bearing 411 may include a bushing B, which may radially support a lower end portion of the rotation shaft 410 of the rotor 400, and a support pin P, which may axially support a lower end of the rotation shaft 410. Accordingly, the rotor 400 is inserted and disposed into the inside of the rotor housing part 220, i.e., the rotor housing space 221, and the outer circumferential surface of the rotor 400 may be disposed to be spaced apart from the inner circumferential surface of the rotor housing part 220. In addition, the lower end portion of the rotation shaft 410 of the rotor 400 is coupled with the lower bearing 411 so that the rotor 400 can smoothly rotate. In addition, the rotor receiving part 220 of the lower case 210 may be inserted and coupled to the inside of the stator 100.

The upper case 600 is coupled to the upper side of the lower case 210, and an impeller accommodating space 601 in which the impeller 500 can be accommodated is formed inside by coupling the upper case 600 to the lower case 210. In addition, an upper seating groove 630 is formed at a lower surface of the upper case 600 to be upwardly recessed so as to receive a portion of the impeller 500, and the lower seating groove 211 and the upper seating groove 630 form an impeller receiving space 601. In addition, a recessed upper flow path groove 632 may be formed at the lower surface of the upper housing 600 so that the fluid discharged from the impeller 500 may flow at a position corresponding to the lower flow path groove 212 of the lower housing 210. In addition, the central portion of the upper case 600 is penetrated up and down so that the upper seating groove 630 and the inlet portion 610 communicate with each other, and an outlet portion 620 may be formed to connect the upper flow path groove 632 and the lower flow path groove 212. In addition, the upper housing 600 is formed with an upper bearing mounting portion 602 inside the inlet portion 610, and the upper bearing 412 may be coupled with the upper bearing mounting portion 602. At this time, the upper bearing mounting portion 602 is provided at a portion where the inflow channel 611 is formed, and the upper bearing mounting portion 602 is fixed to the support portion 612 formed to protrude from the inner circumferential surface of the inflow channel 611, and fluid can smoothly pass between the support portions 612 and flow into the impeller 500 side. Here, the upper bearing 412 may include a bushing B that may radially support an upper end portion of the rotation shaft 410 of the rotor 400 and a support pin P that may axially support an upper end of the rotation shaft 410. Accordingly, the upper end of the rotation shaft 410 of the rotor 400 is coupled with the upper bearing 412, so that the rotor 400 can smoothly rotate.

The impeller 500 serves to press the fluid flowing into the inlet portion 610 of the upper case 600 to the outlet portion 620 side by rotation. For example, the impeller 500 is integrally formed of the main plate 510 and the plurality of blades 530, and the impeller 500 is constructed to further include a lower plate 520, and the lower plate 520 may be integrally formed with the core of the rotor 400. Accordingly, the plurality of blades 530 may be formed in a form in which one side is coupled to the main plate 510 and the other side is coupled to the lower plate 520. The through hole 501 formed in the main plate 510 communicates with the inlet portion 610 of the upper case 600. The outer peripheral edge of the impeller 500 is disposed near the lower flow path groove 212 and the upper flow path groove 632, and the fluid discharged from the impeller 500 flows along the discharge flow path 621 formed by the flow path grooves and is discharged through the outlet 620 of the upper case 600.

Accordingly, the fluid flowing into the inlet 610 of the upper case 600 flows into the impeller 500 through the inflow channel 611 and the through hole 501 in the upper center of the impeller 500, is boosted by the centrifugal force generated by the rotation of the impeller 500, flows into the discharge channel 621, flows along the discharge channel 621, and is discharged to the outside through the outlet 620.

As described above, the rotor 400 is disposed in the rotor receiving space 221 of the lower case 210, and the outer circumferential surface of the rotor 400 may be disposed to be spaced apart from the inner circumferential surface of the rotor receiving part 220.

The present invention is not limited to the above-described embodiments, and various modifications may be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims.

Claims

1. An impeller for a water pump, comprising:

main board

A plurality of blades formed on one surface of the main plate and arranged to be spaced apart from each other along a circumferential direction of the main plate;

the intervals between the plurality of blades arranged at intervals are unequal intervals different from each other.

2. An impeller for a water pump according to claim 1, characterized in that,

the blade separation spacing between the plurality of blades of the spaced apart arrangement is an angle between the tips of the plurality of blades of the spaced apart arrangement.

3. An impeller for a water pump according to claim 2, characterized in that,

the separation intervals of the blades adjacent to each other are different.

4. An impeller for a water pump according to claim 3, characterized in that,

the blade separation intervals are all different.

5. An impeller for a water pump according to claim 2, characterized in that,

among the plurality of blades, the blades facing each other with respect to the center of the main plate are different from each other in the interval.

6. An impeller for a water pump according to claim 2, characterized in that,

the blades are irregularly arranged at intervals.

7. An impeller for a water pump according to claim 2, characterized in that,

the plurality of blades are formed to have different degrees of bending from each other.

8. An impeller for a water pump according to claim 2, characterized in that,

the plurality of blades are formed to have different thicknesses from each other.

9. An impeller for a water pump according to claim 2, characterized in that,

where the number of vanes is N and the vane spacing interval is a,

the vanes are disposed at intervals within an angular range satisfying the following formula 1,

equation 1:

10. a water pump, comprising:

a motor housing in the form of a container with an open upper side,

a stator arranged inside the motor housing,

a lower housing coupled with an upper side of the motor housing, a rotor receiving part protruding downward, a rotor receiving space recessed downward from an upper surface of the lower housing, the rotor receiving part being inserted into an inner side of the stator,

an upper housing coupled to an upper side of the lower housing, an impeller receiving space being formed inside by coupling with the lower housing, and an inlet portion communicating with the impeller receiving space to allow fluid to flow in and an outlet portion to allow fluid to be discharged being formed at the upper housing,

the impeller for a water pump according to any one of claims 1 to 9, rotatably provided in the impeller housing space, and

a rotor rotatably provided in the rotor receiving space of the lower housing and coupled to the impeller.

11. The water pump of claim 10, wherein the water pump is configured to provide the water,

the impeller for a water pump further includes a lower plate coupled to the plurality of blades from a side opposite to the side of the main plate,

the main plate and the blades of the impeller for the water pump are integrally formed, and the lower plate and the rotor are integrally formed.

12. The water pump of claim 11, wherein the water pump is configured to provide the water,

the impeller for the water pump is provided with a through hole penetrating through two sides at the center of the main board.