KR20200142960A - Impeller and pump assembly including same - Google Patents

Abstract

Embodiments according to one aspect of the present invention relate to an impeller. The impeller according to an exemplary embodiment of the present invention comprises: a rotating shaft coupling unit to which a rotating shaft is coupled, and which is arranged in an up and down direction; a cylinder unit arranged to be spaced in the radial direction of the outer side from the rotating shaft coupling unit; a circular disc unit extended in the radial direction of the inner side from the cylinder unit and spaced from the rotating shaft coupling unit; a plurality of first wing units each of which includes a first upper end portion formed lower than the upper end of the cylindrical unit, a first outer side radial-directional end portion spaced in the radial direction of the inner side from the cylinder unit, and a first protruding portion extended upwards in the axial direction of the rotating shaft from the first upper end portion in a position adjacent to the first outer side radial-directional end portion, and is radially extended in the radial direction of the outer side from the rotating shaft coupling unit; a plurality of second wing units each of which includes a second upper end portion formed lower than the upper end of the cylindrical unit, a second outer side radial-directional end portion spaced in the radial direction of the inner side from the cylinder unit, and a second protruding portion extended upwards in the axial direction from the second upper end portion in a position adjacent to the second outer side radial-directional end portion, and is arranged between two adjacent first wing units among the plurality of first wing units; and a plurality of third wing units radially extended in the radial direction of the outer side from the side lower than the first wing units. The present invention can prevent the fluid, sucked by a sucking unit, from being spilt over the cylindrical unit to flow in the radial direction of the inner side.

Description

Impeller and pump assembly including the same TECHNICAL FIELD

The present disclosure relates to an impeller and a pump assembly including the same.

In general, the pump is configured to transport fluid from any location to any other location using pressure action. According to some embodiments, the pump includes a drive motor, an impeller that rotates by rotational driving force of the drive motor, and a housing in which the impeller is accommodated. The impeller includes a plurality of large-diameter blades disposed on the discharge part side of the pump, small-diameter blades disposed on the suction part side of the pump, and a cylindrical side wall disposed in the outer radial direction of the large-diameter blade. The large diameter blade is formed to protrude toward the drive motor rather than the cylindrical side wall. As the impeller rotates, fluid is sucked from a suction unit located in the vicinity of the small-diameter blade and discharged through a discharge unit located in the vicinity of the large-diameter blade.

In some conventional embodiments, due to the structure of the large diameter blade and the cylindrical side wall of the impeller, the fluid sucked from the suction unit may flow in the inner radial direction beyond the cylindrical side wall. In this case, the fluid flowing over the cylindrical side wall collides with the large-diameter wing, and noise and vibration may occur in the impeller. In addition, the fluid sucked from the suction unit may flow in the outer radial direction by centrifugal force and flow in the circumferential direction beyond the upper end of the large diameter blade. In this case, the fluid collides with the large-diameter blade, and noise and vibration may occur in the impeller.

The present disclosure is to solve at least some of the defects of the prior art described above, and provides an impeller capable of reducing vibration and noise generated from the impeller, and a pump assembly including the same.

Embodiments according to one aspect of the present disclosure relate to an impeller. An impeller according to an exemplary embodiment includes: a rotation shaft coupling portion coupled to a rotation shaft and disposed in a vertical direction; A cylindrical portion spaced apart from the rotation shaft coupling portion along the outer radial direction; A disk portion extending in the inner radial direction from the cylindrical portion and spaced apart from the rotation shaft coupling portion; A first upper end formed below the upper end of the cylindrical part, a first outer radial end spaced apart from the cylindrical part in an inner radial direction, and a position adjacent to the first outer radial end from the first upper end along the axial direction of the rotation axis A plurality of first wing portions including a first protrusion extending upward, and extending radially in an outer radial direction from the rotation shaft coupling portion; A second upper end formed below the upper end of the cylindrical part, a second outer radial end spaced apart from the cylindrical part along the inner radial direction, and a position adjacent to the second outer radial end, upward from the second upper end along the axial direction A plurality of second wing portions including a second protruding portion extending, each of which is disposed between two adjacent first wing portions among the plurality of first wing portions; And a plurality of third wing portions extending radially in an outer radial direction below the first wing portion.

In one embodiment, the first protrusion may extend upward to an upper end of the cylindrical portion.

In one embodiment, the second protrusion may extend upward to an upper end of the cylindrical portion.

In one embodiment, the second wing portion may further include an inner radial end spaced apart from the rotation shaft coupling portion in an outer radial direction.

In one embodiment, the separation distance between the rotation shaft coupling portion and the disk portion may be set to be shorter than the separation distance between the rotation shaft coupling portion and the inner radial end of the second wing portion.

In one embodiment, the disk portion may be disposed to be inclined with respect to the rotation shaft coupling portion.

In one embodiment, a first chamfer may be formed between the first outer radial end and the first protrusion.

In one embodiment, a second chamfer may be formed between the second outer radial end and the second protrusion.

In one embodiment, the plurality of third wing portions may be formed to extend downward from the plurality of first wing portions.

Embodiments according to another aspect of the present disclosure relate to an impeller. An impeller according to an exemplary embodiment includes: a rotation shaft coupling portion coupled to a rotation shaft and disposed in a vertical direction; A cylindrical portion spaced apart from the rotation shaft coupling portion along the outer radial direction; A disk portion extending in the inner radial direction from the cylindrical portion and spaced apart from the rotation shaft coupling portion; A first inner upper end formed below the upper end of the cylindrical part, a first outer radial end spaced apart from the cylindrical part along the inner radial direction, and upward along the axial direction of the rotation axis from the first inner upper end to the first outer radial end A plurality of first wing portions including a first outer upper end portion extending to and extending radially in an outer radial direction from the rotation shaft coupling portion; A second inner upper end formed below the upper end of the cylindrical part, a second outer radial end spaced apart from the cylindrical part in the inner radial direction, and extending upward along the axial direction from the second inner upper end to the second outer radial end A plurality of second wing portions including a second outer upper end portion, each of which is disposed between two adjacent first wing portions among the plurality of first wing portions; And a plurality of third wing portions extending radially in an outer radial direction below the first wing portion.

In one embodiment, the first outer upper end may extend upward to the upper end of the cylindrical portion.

In one embodiment, the second outer upper end may extend upward to the upper end of the cylindrical portion.

Embodiments according to yet another aspect of the present disclosure relate to a pump assembly. A pump assembly according to an exemplary embodiment includes an impeller according to the above-described embodiment; A drive motor including a rotation shaft coupled to a rotation shaft coupling portion of the impeller; A first housing supporting the drive motor; And a second housing coupled to the first housing under the first housing and accommodating an impeller.

In one embodiment, the upper end of the cylindrical portion may be disposed to be spaced apart downward from the lower end of the first housing.

In an embodiment, the second housing includes: a suction unit formed at a lower end and in which a plurality of third wing units are disposed; And it may include a discharge portion disposed on the side of the cylindrical portion.

In one embodiment, the stator and the rotor of the driving motor may be accommodated above the first housing.

According to the impeller according to various embodiments, since the first wing portion and the second wing portion are formed below the cylindrical portion, it is possible to suppress or prevent the fluid sucked from the suction portion from flowing in the inner radial direction beyond the cylindrical portion. In addition, since a first protrusion is formed on the first wing and a second protrusion is formed on the second wing, the fluid flows in the outer radial direction and crosses the upper ends of the first wing and the second wing in a radial direction. It can inhibit or prevent flow. As a result, noise and vibration generated by the impeller can be reduced.

1 is a perspective view showing an impeller according to an embodiment of the present disclosure.
2 is a plan view showing the impeller shown in FIG. 1.
FIG. 3 is a cross-sectional view taken along the line 3-3' shown in FIG. 1.
4 is a cross-sectional view taken along line 4-4' shown in FIG. 1;
5 is a perspective view showing the impeller shown in FIG. 1 from a different angle.
6 is a perspective view showing an impeller according to another embodiment of the present disclosure.
7 is a plan view showing the impeller shown in FIG. 6.
FIG. 8 is a cross-sectional view taken along the line 8-8' shown in FIG. 6.
FIG. 9 is a cross-sectional view taken along line 9-9' shown in FIG. 6.
10 is a perspective view showing a pump assembly according to an embodiment of the present disclosure.
11 is an exploded perspective view showing the pump assembly shown in FIG. 10 by exploding.
12 is a cross-sectional view taken along the line 12-12' shown in FIG. 10;
13 is a graph showing a comparison of the lift performance and noise of the pump assembly according to the comparative example and the pump assembly according to the embodiment.

Embodiments of the present disclosure are illustrated for the purpose of describing the technical idea of the present disclosure. The scope of the rights according to the present disclosure is not limited to the embodiments presented below or a detailed description of these embodiments.

All technical and scientific terms used in the present disclosure have meanings generally understood by those of ordinary skill in the art, unless otherwise defined, to which the present disclosure belongs. All terms used in the present disclosure are selected for the purpose of describing the present disclosure more clearly, and are not selected to limit the scope of the rights according to the present disclosure.

Expressions such as "comprising", "having", "having", etc. used in the present disclosure are open terms that imply the possibility of including other embodiments, unless otherwise stated in the phrase or sentence in which the expression is included. It should be understood as (open-ended terms).

Expressions in the singular form described in the present disclosure may include the meaning of the plural form unless otherwise stated, and the same applies to the expression in the singular form described in the claims.

Expressions such as "first" and "second" used in the present disclosure are used to distinguish a plurality of components from each other, and do not limit the order or importance of the components.

In the present disclosure, "axial direction (AD)" may be defined as meaning a direction parallel to the rotational axis (RA) of the impeller or pump assembly, and "radial direction (RD)" is away from the axis of rotation or It may be defined to mean a direction toward a rotational axis, and "circumferential direction (CD)" may be defined to mean a direction surrounding the axial direction around the axial direction.

Directional indicators such as "upward" and "upward" used in the present disclosure are based on the direction in which the first and second wing portions are positioned with respect to the third wing portion in the axial direction (AD), and "downward", " Directional directives such as "lower" mean the opposite direction. The first to third wing portions shown in the accompanying drawings may be oriented differently, and these direction indicators may be interpreted accordingly.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding components are assigned the same reference numerals. In addition, in the description of the following embodiments, overlapping descriptions of the same or corresponding components may be omitted. However, even if description of a component is omitted, it is not intended that such component is not included in any embodiment.

1 is a perspective view showing an impeller according to an embodiment of the present disclosure. FIG. 2 is a perspective view illustrating the impeller shown in FIG. 1 from a different angle.

1 and 2, the impeller 100 according to an embodiment of the present disclosure includes a rotating shaft coupling portion 110, a cylindrical portion 120, a disk portion 130, a plurality of first wing portions ( 140), and a plurality of second wing portions 150, and a plurality of third wing portions 160. The impeller 100 sucks fluid from the suction unit 331 by rotating by the rotational driving force of the driving motor 310 in the pump assembly 300 according to an embodiment to be described later, and discharges the fluid through the discharge unit 332. . The rotation shaft coupling portion 110, the cylindrical portion 120, the disk portion 130, a plurality of first wing portions 140, a plurality of second wing portions 150, and a plurality of third wing portions 160 are It is divided to easily describe the structure and shape of the impeller 100, but the present disclosure is not limited thereto. The impeller 100 may be made of a plastic material, and may be manufactured, for example, through injection molding.

The rotation shaft coupling unit 110 is coupled to the rotation shaft 311 of the driving motor 310 to be described later and is disposed in the vertical direction. The rotation shaft coupling part 110 is manufactured in a hollow cylindrical shape, and the rotation shaft 311 may be inserted and fixed to the rotation shaft coupling part 110. The rotation shaft 311 may be fixed by being pressed into the rotation shaft coupling portion 110, or the rotation shaft 311 may be coupled to the rotation shaft coupling portion 110 through insert injection using the rotation shaft 311 as an insert.

The cylindrical portion 120 is disposed to be spaced apart from the rotation shaft coupling portion 110 along the outer radial direction OR. That is, the cylindrical portion 120 is disposed coaxially with the rotation shaft coupling portion 110 so as to be parallel to the outer peripheral surface 111 of the rotation shaft coupling portion 110. The upper end of the cylindrical part 120 is disposed lower than the upper end of the rotation shaft coupling part 110. That is, the rotation shaft coupling portion 110 protrudes upward and extends from the cylindrical portion 120. The cylindrical part 120 buffers the flow path of the fluid flowing through the suction part 331 and the third wing part 160 and the flow path of the fluid discharged through the discharge part 332 so that they do not overlap or collide with each other. Plays a role.

The disk portion 130 extends in the inner radial direction (IR) from the cylindrical portion 120 and is spaced apart from the rotation shaft coupling portion 110. A ring-shaped spaced space 131 is formed between the rotation shaft coupling portion 110 and the disk portion 130. The fluid sucked from the suction unit 331 flows between the first wing unit 140 and the second wing unit 150 through the spaced space 131. The disk portion 130 holds the fluid so that the fluid introduced through the spaced space 131 between the rotation shaft coupling portion 110 and the disk portion 130 is not recovered to the suction portion 331. In addition, the disk portion 130 is coupled to the lower end of the first wing portion 140 and the second wing portion 150 to support the first wing portion 140 and the second wing portion 150.

In one embodiment, the disk portion 130 may be disposed to be inclined with respect to the rotation shaft coupling portion 110. That is, the disk portion 130 may form an obtuse angle with respect to the cylindrical portion 120 and an acute angle with respect to the rotation shaft coupling portion. Since the flow path through which the fluid flows along the axial direction RA is shortened, the lifting efficiency of the impeller 100 may be increased. In addition, the fluid introduced through the spaced space 131 may gradually flow along the outer radial direction OR along the obliquely disposed disk unit 130. As a result, the flow path through which the fluid flows can be prevented from rapidly changing, and an impact between the fluid and the impeller 100 can be suppressed.

2 is a plan view showing the impeller shown in FIG. 1.

As shown in FIG. 2, the plurality of first wing portions 140 radially extend from the rotation shaft coupling portion 110 in the outer radial direction OR. In addition, the plurality of first wing portions 140 extend upward from the disk portion 130. The first wing portion 140 has a plate shape having a predetermined thickness, and the plurality of first wing portions 140 are arranged rotationally symmetrically with respect to the central axis of the rotation shaft coupling portion 110. As the impeller 100 rotates, the first wing part 140 flows or pushes the fluid introduced through the spaced space 131 to be discharged toward the discharge part 332. In FIG. 2, the four first wing portions 140 are illustrated as being arranged to form an angle of 90 degrees along the circumferential direction CD, but the present disclosure is not limited thereto. For example, the plurality of first wing portions 140 may be configured with three or more odd numbers, or six or more even numbers.

FIG. 3 is a cross-sectional view taken along the line 3-3' shown in FIG. 1.

As shown in FIG. 3, the first wing part 140 includes a first upper end 141, a first outer radial end 142, and a first protrusion 143. The first upper end 141, the first outer radial end 142, and the first protrusion 143 are divided to easily describe the structure and shape of the first wing 140, but the present disclosure Not limited.

The first upper end 141 is formed below the upper end 121 of the cylindrical part 120. The first upper end 141 is disposed vertically with respect to the outer circumferential surface 111 of the rotation shaft coupling unit 110. The first outer radial end 142 is spaced apart from the cylindrical portion 120 along the inner radial direction IR. The separation distance between the first outer radial end 142 and the cylindrical portion 120 may be set to be shorter than the separation distance between the rotation shaft coupling portion 110 and the disk portion 130. The first protrusion 143 extends upwardly along the axial direction RA of the rotation shaft 311 from the first upper end 141 at a position adjacent to the first outer radial end 142. The first protrusion 143 inhibits or prevents the fluid from flowing in the circumferential direction beyond the first upper end 141 at a position adjacent to the first outer radial end 142. Accordingly, vibration and noise generated by the collision between the fluid and the first wing 140 may be reduced.

In one embodiment, the first protrusion 143 may extend upward to the upper end 121 of the cylindrical portion 120. That is, the first protrusion 143 has the same height as the upper end 121 of the cylindrical portion 120. Accordingly, it is suppressed or prevented that the fluid flows in the inner radial direction (IR) beyond the upper end 121 of the cylindrical portion 120. Therefore, it is possible to further reduce vibration and noise generated by the collision between the fluid flowing over the cylindrical portion 120 and the first wing portion 140.

In one embodiment, a first chamfer 144 may be formed between the first outer radial end 142 and the first protrusion 143. When the chamfer is not formed between the first outer radial end 142 and the first protrusion 143 and is disposed vertically, between the first outer radial end 142 and the first protrusion 143 The edges may rub against the fluid, causing vibration and noise. By forming a first chamfer 144 between the first outer radial end 142 and the first protrusion 143, the friction between the fluid and the first wing 140 is reduced, thereby generating vibration and noise. Can be suppressed or prevented.

Referring back to FIG. 2, each of the plurality of second wing portions 150 is disposed between two adjacent first wing portions 140 among the plurality of first wing portions 140. In addition, the second wing portion 150 extends upward from the disk portion 130. The second wing portion 150 has a plate shape having a predetermined thickness, and the plurality of second wing portions 150 are arranged rotationally symmetrically with respect to the central axis of the rotation shaft coupling portion 110. As the impeller 100 rotates, the second wing portion 150 flows or pushes the fluid introduced through the spaced space 131 toward the first wing portion. 2 shows that the four second wing portions 150 are arranged to form an angle of 90 degrees along the circumferential direction (CD), but the present disclosure is not limited thereto, and the number of the first wing portions 140 Can be decided. For example, the plurality of second wing parts 150 may be composed of three or more odd numbers, or six or more even numbers.

4 is a cross-sectional view taken along line 4-4' shown in FIG. 1;

As shown in FIG. 4, the second wing portion 150 includes a second upper end portion 151, a second outer radial end portion 152, and a second protrusion portion 153. The second upper end 151, the second outer radial end 152, and the second protrusion 153 of the second wing 150 are the first outer radial end 142 of the first wing 140 , And the first protrusion 143 may have a similar shape. The second upper end 151, the second outer radial end 152, and the second protrusion 153 are divided to easily describe the structure and shape of the second wing part 150, but the present disclosure Not limited.

The second upper end 151 is formed below the upper end 121 of the cylindrical part 120. The second upper end portion 151 is disposed vertically with respect to the outer peripheral surface 111 of the rotation shaft coupling portion 110. The second outer radial end 152 is spaced apart from the cylindrical portion 120 along the inner radial direction IR. The separation distance between the second outer radial end 152 and the cylindrical portion 120 may be set to be shorter than the separation distance between the rotation shaft coupling portion 110 and the disk portion 130. The second protrusion 153 extends upward along the axial direction RA of the rotation shaft 311 from the second upper end 151 at a position adjacent to the second outer radial end 152. The second protrusion 153 inhibits or prevents the fluid from flowing in the circumferential direction beyond the second upper end 151 at a position adjacent to the first outer radial end 142. Accordingly, vibration and noise generated by the collision between the fluid and the second wing unit 150 can be reduced.

In one embodiment, the second protrusion 153 extends upward to the upper end 121 of the cylindrical portion 120. That is, the second protrusion 153 has the same height as the upper end 121 of the cylindrical portion 120. Accordingly, it is suppressed or prevented that the fluid flows in the inner radial direction (IR) beyond the upper end 121 of the cylindrical portion 120. Accordingly, vibration and noise generated by collision between the fluid flowing over the cylindrical portion 120 and the second wing portion 150 can be further reduced.

In an embodiment, the second wing portion 150 may further include an inner radial end 155 spaced apart from the rotation shaft coupling portion 110 in an outer radial direction OR. Therefore, the fluid can be easily introduced between the adjacent two first wing portions 140 through the spaced space 131.

In one embodiment, the separation distance between the rotation shaft coupling portion 110 and the disk portion 130 is shorter than the separation distance between the rotation shaft coupling portion 110 and the inner radial end 155 of the second wing portion 150 Can be set. That is, the inner radial end 155 may be positioned in the outer radial direction than the inner radial end 155 of the disk unit 130.

In one embodiment, a second chamfer 154 may be formed between the second outer radial end 152 and the second protrusion 153. When the chamfer is not formed between the second outer radial end 152 and the second protrusion 153 and is disposed vertically, between the second outer radial end 152 and the second protrusion 153 The edges may rub against the fluid, causing vibration and noise. By forming a second chamfer 154 between the second outer radial end 152 and the first protrusion 153, the friction between the fluid and the second wing 150 is reduced, and vibration and noise are generated. Can be suppressed or prevented.

5 is a perspective view showing the impeller shown in FIG. 1 from a different angle.

As shown in FIG. 5, the plurality of third wing portions 160 radially extend from below the first wing portion 140 in an outer radial direction OR. The third wing unit 160 sucks a fluid through a suction unit and flows upward. In FIG. 5, it is illustrated that the four third wing portions 160 are arranged to form an angle of 90 degrees along the circumferential direction (CD), but the present disclosure is not limited thereto. For example, the plurality of third wing portions 160 may be configured with three or more odd numbers, or six or more even numbers.

In one embodiment, the plurality of third wing portions 160 may be formed to extend downward from the plurality of first wing portions 140. Accordingly, the number of the third wing portions 160 may be determined by the number of the first wing portions 140.

6 is a perspective view showing an impeller according to another embodiment of the present disclosure.

As shown in Figure 6, the impeller 200 according to another embodiment of the present disclosure includes a rotary shaft coupling portion 110, a cylindrical portion 120, a disk portion 130, a first wing portion 240, a second It includes a wing portion 250, and a third wing portion 160. The rotation shaft coupling portion 110, the cylindrical portion 120, the disk portion 130, and the third wing portion 160 of the impeller 200 according to this embodiment are shown in FIGS. 1 to 5 Since the impeller 100 has the same or similar configuration as the rotation shaft coupling portion 110, the cylindrical portion 120, the disk portion 130, and the third wing portion 160, a detailed description thereof will be omitted. Therefore, in the following description, the first wing portion 240 and the second wing portion 250 will be mainly described.

7 is a plan view showing the impeller shown in FIG. 6.

As shown in FIG. 7, the plurality of first wing portions 240 radially extend from the rotation shaft coupling portion 110 in the outer radial direction OR. In addition, the plurality of first wing portions 240 extend upward from the disk portion 130. The first wing portion 240 has a plate shape having a predetermined thickness, and the plurality of first wing portions 240 are arranged rotationally symmetrically with respect to the central axis of the rotation shaft coupling portion 110. As the impeller 200 rotates, the first wing part 240 flows or pushes the fluid introduced through the spaced space 131 to be discharged toward the discharge part 332. In FIG. 2, the four first wing portions 240 are illustrated as being arranged to form an angle of 90 degrees along the circumferential direction CD, but the present disclosure is not limited thereto. For example, the plurality of first wing portions 240 may be composed of three or more odd numbers, or six or more even numbers.

FIG. 8 is a cross-sectional view taken along the line 8-8' shown in FIG. 6.

As shown in FIG. 8, the first wing portion 240 includes a first inner upper end 241, a first outer radial end 242, and a first outer upper end 243. The first inner upper end 241, the first outer radial end 242, and the first outer upper end 243 are separated to easily describe the structure and shape of the first wing part 240, but the present disclosure Is not limited to this.

The first inner upper end 241 is formed below the upper end 121 of the cylindrical part 120. The first outer radial end 242 is spaced apart from the cylindrical portion 120 along the inner radial direction IR. The separation distance between the first outer radial end 242 and the cylindrical portion 120 may be set to be shorter than the separation distance between the rotation shaft coupling portion 110 and the disk portion 130. The first outer upper end 243 extends upwardly from the first inner upper end 241 to the first outer radial end 242 along the axial direction RA of the rotation shaft 311. That is, the first outer upper end 243 is formed higher than the first inner upper end 241. In addition, the first wing portion 240 obliquely extends from the first inner upper end 241 to the first outer upper end 243. Due to this structure of the first wing part 240, it is suppressed or prevented that the fluid flows in the circumferential direction (CD) beyond the first outer upper end 243 at a position adjacent to the first outer radial end 242 . Accordingly, vibration and noise generated by the collision between the fluid and the first wing part 240 can be reduced.

In one embodiment, the first outer upper end 243 may extend upward to the upper end 121 of the cylindrical part 120. That is, the first outer upper end 243 has the same height as the upper end 121 of the cylindrical part 120. Accordingly, the fluid is prevented from flowing in the inner radial direction (IR) beyond the upper end 121 of the cylindrical portion 120. Accordingly, vibration and noise generated by collision between the fluid flowing beyond the cylindrical portion 120 and the first wing portion 240 can be reduced.

Referring back to FIG. 7, each of the plurality of second wing portions 250 is disposed between two adjacent first wing portions 240 among the plurality of first wing portions 240. In addition, the second wing portion 250 extends upward from the disk portion 130. The second wing portion 250 has a plate shape having a predetermined thickness, and the plurality of second wing portions 250 are arranged rotationally symmetrically with respect to the central axis of the rotation shaft coupling portion 110. As the impeller 200 rotates, the second wing portion 250 flows or pushes the fluid introduced through the spaced space 131 toward the first wing portion 240. 2 shows that the four second wing portions 250 are arranged to form an angle of 90 degrees along the circumferential direction (CD), but the present disclosure is not limited thereto and according to the number of the first wing portions 240 Can be decided. For example, the plurality of second wing portions 250 may be configured with three or more odd numbers, or six or more even numbers.

FIG. 9 is a cross-sectional view taken along line 9-9' shown in FIG. 6.

As shown in FIG. 9, the second wing part 250 includes a second inner upper end 251, a second outer radial end 252, and a second outer upper end 253. The second inner upper end 251, the second outer radial end 252, and the second outer upper end 253 are separated to easily describe the structure and shape of the second wing part 250, but the present disclosure Is not limited to this.

The second inner upper end 251 is formed below the upper end 121 of the cylindrical part 120. The second outer radial end 252 is spaced apart from the cylindrical portion 120 along the inner radial direction IR. The separation distance between the second outer radial end 252 and the cylindrical portion 120 may be set to be shorter than the separation distance between the rotation shaft coupling portion 110 and the disk portion 130. The second outer upper end 253 extends upward from the second inner upper end 251 to the second outer radial end 252 along the axial direction RA of the rotation shaft 311. That is, the second outer upper end 253 is formed higher than the second inner upper end 251. In addition, the second wing portion 250 obliquely extends from the first inner upper end 241 to the first outer upper end 243. Due to this structure of the second wing part 250, it is suppressed or prevented that the fluid flows in the circumferential direction (CD) beyond the second outer upper end 253 at a position adjacent to the first outer radial end 242 . Accordingly, vibration and noise generated by the collision between the fluid and the second wing part 250 may be reduced.

In one embodiment, the second outer upper end 253 may extend upward to the upper end 121 of the cylindrical part 120. That is, the second outer upper end 253 has the same height as the upper end 121 of the cylindrical part 120. Accordingly, the fluid is prevented from flowing in the inner radial direction (IR) beyond the upper end 121 of the cylindrical portion 120. Accordingly, vibration and noise generated by the collision between the fluid flowing over the cylindrical portion 120 and the second wing portion 250 can be reduced.

10 is a perspective view showing a pump assembly according to an embodiment of the present disclosure. 11 is an exploded perspective view showing the pump assembly shown in FIG. 10 by exploding.

10 and 11, the pump assembly 300 according to an embodiment of the present disclosure includes an impeller 100, a drive motor 310, a first housing 320, and a second housing 330. Includes. The impeller 100 of the pump assembly 300 according to this embodiment is the same or similar to the impeller 100 according to the embodiment shown in FIGS. 1 to 5 and the impeller 200 shown in FIGS. 6 to 9 Since it has, a detailed description thereof will be omitted. Therefore, in the following description, the first housing 320 and the second housing 330 will be mainly described.

The drive motor 310 includes a rotation shaft 311 coupled to the rotation shaft coupling portion 110 of the impeller 100 and generates a driving force for driving the impeller 100. The driving motor 310 may be composed of various types of electric motors, and may be composed of, for example, a DC motor.

The first housing 320 is configured to support the driving motor 310. In addition, the first housing 320 also serves as an upper cover or a lid of the second housing 330.

In one embodiment, the stator and the rotor of the driving motor 310 may be accommodated above the first housing 320. The first housing 320 may have a cup shape so that components of the driving motor 310 are accommodated above the first housing 320.

The second housing 330 is coupled to the first housing 320 under the first housing 320 and the impeller 100 is accommodated. The second housing 330 may have a funnel shape. The space created by the coupling between the first housing 320 and the second housing 330 serves as a chamber of the pump assembly 300.

In one embodiment, the upper end 121 of the cylindrical portion 120 may be disposed to be spaced downward from the lower end 321 of the first housing 320. The fluid flows toward the discharge part 332 through the spaced space between the upper end 121 of the cylindrical part 120 and the lower end 321 of the first housing 320.

12 is a cross-sectional view taken along the line 12-12' shown in FIG. 10;

In one embodiment, as shown in FIG. 12, the second housing 330 may include a suction part 331 and a discharge part 332. The suction part 331 is formed at the lower end of the second housing 330 and a plurality of third wing parts 160 are disposed to form a flow path through which a fluid is sucked and flowed. The discharge part 332 is disposed on the side of the cylindrical part 120 to form a flow path for discharging the fluid sucked from the suction part 331 to the outside of the pump assembly 300. In the pump assembly 300 shown in FIGS. 11 and 12, the impeller 100 according to the embodiment shown in FIGS. 1 to 5 is shown as an impeller, but in the embodiment shown in FIGS. 6 to 9 According to the impeller 200 can be applied.

Table 1 shows experimental results for the lift performance and noise of the pump assembly according to the comparative example and the pump assembly according to the example.

Water level [mm] Head [ml/min] Noise [dB] Comparative example Example Comparative example Example 10 855 877 37.3 34.5 5 690 810 35.6 31.0 0 530 720 31.3 27.7

In Table 1, the water level is a measure of the height from the lower end 331a of the suction unit 331 shown in FIG. 12. The pump assembly according to the comparative example has an impeller having a cylindrical portion lower than that of the first wing portion and a first protrusion not formed at the first upper end, and other components are tested under the same conditions as the pump assembly according to the embodiment. 13 is a graph showing the comparison of the lift performance and noise of the pump assembly according to the comparative example and the pump assembly according to the example. That is, FIG. 13 is a graph schematically illustrating the lift performance and noise shown in Table 1.

Referring to the graph of FIG. 13, it was confirmed that the pump assembly 300 according to the embodiment has a high lift performance and generates low noise compared to the comparative example. It was also confirmed that in the entire water level section, the pump assembly 300 according to the embodiment generates higher lift performance and lower noise than the comparative example. In the pump assembly 300 according to the embodiment, the first wing portion 140 and the second wing portion 150 are formed equal to or lower than the upper end 121 of the cylindrical portion 120, and the first wing portion 140 ) And the second wing part 150 are each formed with a first protrusion 143 and a second protrusion 153, or each of the first outer upper end 243 and the second outer upper end 253 is a first inner upper end ( Since it is configured to be formed higher than the 241 and the second inner upper end 251, it can be understood that it has a high lift performance and generates low noise.

Although the technical idea of the present disclosure has been described with reference to some embodiments and examples shown in the accompanying drawings above, it does not depart from the technical idea and scope of the present disclosure that can be understood by those of ordinary skill in the art to which this disclosure belongs It will be appreciated that various substitutions, modifications and changes may be made in the range. In addition, such substitutions, modifications and changes are to be considered as falling within the scope of the appended claims.

100: impeller, 110: rotating shaft coupling portion, 111: outer circumferential surface, 120: cylindrical portion, 130: disk portion, 131: spaced space, 140: first wing portion, 141: first upper end, 142: first outer radial end , 143: first protrusion, 144: first chamfer, 150: second wing, 151: second upper end, 152: second outer radial end, 153: second protrusion, 154: second chamfer, 155 : Inner radial end, 160: third blade, 200: impeller, 240: first blade, 241: first inner upper end, 242: first outer radial end, 243: first outer upper end, 250: first 2 wing part, 251: second inner upper end, 252: second outer radial end, 253: second outer upper end, 300: pump assembly, 310: drive motor, 311: rotating shaft, 320: first housing, 330: second 2 housing, 331: suction unit, 332: discharge unit

Claims (16)

A rotation shaft coupling portion coupled to the rotation shaft and disposed in the vertical direction;
A cylindrical portion spaced apart from the rotation shaft coupling portion along an outer radial direction;
A disk portion extending in an inner radial direction from the cylindrical portion and spaced apart from the rotation shaft coupling portion;
A first upper end formed below the upper end of the cylindrical part, a first outer radial end spaced apart from the cylindrical part along an inner radial direction, and the rotation shaft from the first upper end at a position adjacent to the first outer radial end A plurality of first wing portions including a first protrusion extending upwardly along the axial direction of, and extending radially in an outer radial direction from the rotation shaft coupling portion;
A second upper end formed below the upper end of the cylindrical part, a second outer radial end spaced apart from the cylindrical part in an inner radial direction, and the axis from the second upper end at a position adjacent to the second outer radial end A plurality of second wing portions including second protrusions extending upwardly in a direction, each of which is disposed between two adjacent first wing portions among the plurality of first wing portions; And
A plurality of third wing portions extending radially in an outer radial direction below the first wing portion
Containing, impeller. The method of claim 1,
The first protrusion extends upward to the upper end of the cylindrical portion, the impeller. The method of claim 1,
The second protrusion portion extends upward to the upper end of the cylindrical portion, the impeller. The method of claim 1,
The second wing portion further comprises an inner radial end spaced apart from the rotation shaft coupling portion in the outer radial direction, the impeller. The method of claim 4,
A separation distance between the rotation shaft coupling portion and the disk portion is set to be shorter than a separation distance between the rotation shaft coupling portion and the inner radial end of the second wing portion. The method of claim 1,
The disk portion is disposed obliquely with respect to the rotation shaft coupling portion, impeller. The method of claim 1,
An impeller, wherein a first chamfer is formed between the first outer radial end and the first protrusion. The method of claim 1,
An impeller, wherein a second chamfer is formed between the second outer radial end and the second protrusion. The method of claim 1,
The plurality of third wing portions are formed to extend downward from the plurality of first wing portions, the impeller. A rotation shaft coupling portion coupled to the rotation shaft and disposed in the vertical direction;
A cylindrical portion spaced apart from the rotation shaft coupling portion along an outer radial direction;
A disk portion extending in an inner radial direction from the cylindrical portion and spaced apart from the rotation shaft coupling portion;
A first inner upper end formed below the upper end of the cylindrical part, a first outer radial end spaced apart from the cylindrical part in an inner radial direction, and from the first inner upper end to the first outer radial end of the rotation shaft. A plurality of first wing portions including a first outer upper end portion extending upwardly along the axial direction, and extending radially in an outer radial direction from the rotation shaft coupling portion;
A second inner upper end formed below the upper end of the cylindrical part, a second outer radial end spaced apart from the cylindrical part in an inner radial direction, and the axial direction from the second inner upper end to the second outer radial end A plurality of second wing portions including a second outer upper end portion extending upwardly along the line, each of which is disposed between two adjacent first wing portions among the plurality of first wing portions; And
A plurality of third wing portions extending radially in an outer radial direction below the first wing portion
Containing, impeller. The method of claim 10,
The first outer upper end portion extending upwardly to the upper end of the cylindrical portion, the impeller. The method of claim 10,
The second outer upper end portion extending upward to the upper end of the cylindrical portion, the impeller. The impeller according to any one of claims 1 to 12;
A drive motor including the rotation shaft coupled to the rotation shaft coupling portion of the impeller;
A first housing supporting the drive motor; And
A second housing coupled to the first housing under the first housing and accommodating the impeller
Containing, pump assembly. The method of claim 13,
The upper end of the cylindrical portion is disposed to be spaced apart downward from the lower end of the first housing, the pump assembly. The method of claim 13,
The second housing,
A suction unit formed at a lower end and disposed at the plurality of third wing units; And
A discharge part disposed on the side of the cylindrical part
Containing, the pump assembly. The method of claim 13,
A pump assembly in which the stator and the rotor of the drive motor are accommodated above the first housing.

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