KR102585378B1 - An impeller for air pump of a vehicle and the air pump for the vehicle - Google Patents

Abstract

The present invention relates to a hollow hub; a plurality of vanes extending radially from the outer peripheral surface of the hub; and a separator plate integrally connecting the center of the vane to the center of the outer peripheral surface of the hub. It provides an impeller for a vehicle pump, comprising: an upper, lower, and side surface of the vane being disposed to be exposed to the outside.
In addition, the present invention includes an upper housing to which a cover having an inlet is formed at the top, and an outlet to be formed on one side; an impeller rotatably disposed inside the upper housing to flow fluid from the inlet to the outlet; a lower housing coupled to the lower part of the upper housing and having a driving part provided therein to provide rotational force to the impeller; It provides a vehicle pump, characterized in that the top, bottom, and side surfaces of the impeller are exposed between the upper housing and the cover.

Description

Impeller for vehicle pump and vehicle pump equipped with same {An impeller for air pump of a vehicle and the air pump for the vehicle}

The present invention relates to an impeller for a vehicle pump and a vehicle pump equipped therewith. The present invention relates to an impeller for a vehicle pump capable of increasing efficiency and reducing flow loss by improving the shape of the impeller, and to a vehicle pump provided therewith.

Cars are generally equipped with various pumps. The pump related to the present invention is disclosed in various forms, but is also disclosed in published patent 10-2019-0006330 filed by the present applicant.

In the case of the above registered patent, the impeller has a structure including an upper plate, a lower plate, and a rib-shaped blade connecting them, and is rotatably installed between the pump cover and the housing cover.

At this time, the impeller is made so that one cross section of the rib has a straight or flat shape with respect to the horizontal or vertical direction.

However, since the conventional impeller structure is made so that one cross section has a straight or flat shape with respect to the horizontal or vertical direction, the problem of low pressure and thus low efficiency has been raised.

Korean Patent Publication No. 10-2019-0006330 (published on January 18, 2019)

The present invention is intended to solve this problem, and more specifically, to provide an impeller for a vehicle pump that can improve efficiency by increasing the pressure for the same number of revolutions compared to the prior art by improving the shape of the impeller, and a vehicle pump equipped with the same. The purpose is to provide.

The present invention for achieving this purpose includes a hollow hub; a plurality of vanes extending radially from the outer peripheral surface of the hub; and a separator plate integrally connecting the center of the vane to the center of the outer peripheral surface of the hub. It provides an impeller for a vehicle pump, comprising: an upper, lower, and side surface of the vane being disposed to be exposed to the outside.

The vanes may be bent at the same angle on the top or side surfaces.

The vane includes an inner region disposed inside and an outer region disposed outside based on an imaginary connection line connecting the center of the bent region, and the inner region is formed to be relatively longer in length than the outer region, A first bending angle formed by the virtual straight line and the inner region may be formed to be relatively smaller than a second bending angle formed by the virtual straight line and the outer region.

The separation plate may extend from the outer peripheral surface of the hub to the virtual connection line or beyond the virtual straight line to the outer area.

The outer peripheral surface of the tip of the vane may be bent at an equal angle with respect to the center line in the thickness direction.

The vane may be formed so that two planes face each other based on the center line at one side of the tip, and at least two planes or curved surfaces face each other about the center line at the other side of the tip.

In addition, the present invention includes an upper housing to which a cover having an inlet is formed at the top, and an outlet to be formed on one side; an impeller rotatably disposed inside the upper housing to flow fluid from the inlet to the outlet; a lower housing coupled to the lower part of the upper housing and having a driving part provided therein to provide rotational force to the impeller; It provides a vehicle pump, characterized in that the top, bottom, and side surfaces of the impeller are exposed between the upper housing and the cover.

The impeller may include a hollow hub, a plurality of vanes extending radially from the outer peripheral surface of the hub, and a separation plate integrally connecting the center of the vane to the center of the outer peripheral surface of the hub.

According to the impeller for a vehicle pump according to the present invention and a vehicle pump equipped with the same,

First, by providing a bent shape for the vanes when viewing the impeller from a plan view and a bent shape when viewed from the side, the pressure required for fluid movement in the outward direction can be increased,

Second, as the pressure of the impeller increases, the flow rate increases, thereby improving the performance of the pump.

Third, it has the effect of being lighter and more compact compared to the same performance.

1 is a perspective view showing a vehicle pump according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing the vehicle pump shown in FIG. 1 disassembled.
FIG. 3 is a cross-sectional view showing region II' of the vehicle pump shown in FIG. 1.
Figure 4 is an enlarged perspective view showing the impeller for the pump of the vehicle shown in Figure 2.
FIG. 5 is a cross-sectional view showing a region II-II' of the impeller for the pump of the vehicle shown in FIG. 4.
FIG. 6 is a reference diagram showing a partial area of the impeller for the pump of the vehicle shown in FIG. 4.
Figure 7 is a graph showing a performance curve of a vehicle pump according to an embodiment of the present invention.

Since the present invention can be subject to various changes and can have various embodiments, specific embodiments will be illustrated and described in the drawings.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms.

The above terms are used only for the purpose of distinguishing one component from another.

For example, the second component may be referred to as the first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as the second component.

The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be.

On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, embodiments will be described in detail with reference to the attached drawings, but identical or corresponding components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted.

FIG. 1 is a perspective view showing a vehicle pump according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing the vehicle pump shown in FIG. 1, and FIG. 3 shows the II' region of the vehicle pump shown in FIG. 1. This is a cross-sectional view.

1 to 3, a vehicle pump 100 according to an embodiment of the present invention includes an upper housing 110, an impeller 200, and a lower housing 120.

First, the upper housing 110 has an outlet 111 formed on one side, and an upper cover 113 with an inlet 112 formed at the top is coupled thereto. A pumping space 114 is formed inside the upper housing 110, and an impeller 200 is disposed inside the pumping space 114 between the upper housing 110 and the upper cover 113. Here, the impeller 200 pumps fluid (eg, air or gas) from the intake port 112 and generates pressure inside the pumping space 114 to discharge the fluid to the discharge port 111. Additionally, a sealing member 115 may be provided between the upper housing 110 and the upper cover 113 to seal the pumping space 114.

A lower housing 120 is disposed below the upper housing 110. A storage space 121 is formed inside the lower housing 120 so that the driving unit 130 can be installed.

Additionally, the drive unit 130 penetrates the upper housing 110 and is connected to the impeller 200 to provide rotational force to the impeller 200.

The driving unit 130 includes a connecting shaft 131 connected to the rotation center of the impeller 200, a rotor 132 provided in the center area of the connecting shaft 131, and a stator disposed to surround the rotor 132. It includes (133) and a control unit 134 that controls power and control signals.

Additionally, the connecting shaft 131 may be provided with a bearing 135 that supports the connection shaft 131 so that it can rotate between the back of the upper cover 113 and the lower housing 120. Of course, a groove into which the bearing 135 can be mounted may be formed on the back of the upper cover 113 and the inner peripheral surface of the lower housing 120.

In this embodiment, the bearing 135 provided at the upper end of the connecting shaft 131 is mounted in the bearing groove 116 formed on the inner peripheral surface of the upper housing 110, and the bearing 131 provided at the lower end of the connecting shaft 131 It is mounted on the bearing groove 122 formed on the inner peripheral surface of the lower housing 120.

In addition, the control unit 134 may be disposed at the lower part of the lower housing 120, and the lower cover 140 may be coupled to the lower part of the lower housing 120 to accommodate the control unit 134 therein. A connector 141 that transmits power or control signals may be provided on one side of the lower cover 140.

This driving unit 130 may provide the structure of a brushless motor (Brushless Direct Current motor).

FIG. 4 is an enlarged perspective view showing the pump impeller of the vehicle shown in FIG. 2, and FIG. 5 is a cross-sectional view showing the region II-II' of the pump impeller of the vehicle shown in FIG. 4.

Referring to Figures 4 and 5, the impeller 200 for a vehicle pump includes a hub 210, a vane 220, and a separation plate 230.

The hub 210 has a hollow structure on the inside so that the upper end of the above-described connecting shaft (see FIG. 2, 131) is coupled.

At this time, a bush (see FIG. 3, 117) may be provided between the hub 210 and the connecting shaft 131.

The hub 210 has a substantially hollow circular cross-section and is provided with a plurality of vanes 220 on the outer peripheral surface. At this time, a separation plate 230 is disposed between the hub 210 and the vane 220.

The hub 210 may be made of a single hollow cylinder, or may be made of a structure in which a plurality of cylinders are connected. In this embodiment, a second hub 212, which is relatively smaller in width than the first hub 211, is integrally connected to the outside of the tall first hub 211, and a second hub 212 is connected to the outside of the second hub 212. The application of the hub 210 in which the third hub 213, which has the same width as the hub 212, is integrally connected will be described as an example.

In addition, the hub 210 includes a connecting plate 214 connecting the circumferential centers of the second hub 212 and the third hub 213, and the connecting plate 214 is located on the outer peripheral surface of the first hub 211. It may be extended until.

Then, more precisely, a plurality of vanes 220 are arranged radially on the outer peripheral surface of the third hub 213. In addition, it is preferable that each vane 220 is arranged at equal intervals or at equal angles on the outer peripheral surface of the third hub 213.

At this time, a separation plate 230 protruding of the same size along the circumferential direction is provided on the outside of the third hub 213. The separation plate 230 extends to the center area of each vane 220, reinforcing the rigidity of the vane, and provides a function of connecting the plurality of vanes 220.

The vane 220 has a bent shape from one end close to the hub 210 to the other end, which is the outer tip. Here, the separation plate 230 may extend to a virtual second connection line 231 beyond the virtual first connection line 221 connecting the bent center of the vane 220.

Additionally, the area adjacent to the third hub 213 of the separator plate 230 may be formed to be thicker than the tip. For example, the separation plate 230 may be formed to have a small thickness while drawing a gentle curve from the top and bottom of the third hub 213.

FIG. 6A is a partially enlarged plan view showing the upper surface of the pump impeller of the vehicle shown in FIG. 4, and FIG. 6B is a partially enlarged side view showing the side of the pump impeller of the vehicle shown in FIG. 4.

Referring to FIG. 6A, the vane 220 includes an inner region 222 disposed inside and an outer region 223 disposed outside the bent center.

And, when a straight line (L1) is drawn connecting the point where the vane 220 and the separator plate 230 meet from the rotation center (C) of the impeller 200, the degree of bending of the vane can be easily confirmed.

That is, in FIG. 6A, the first bending angle θ1 formed by one straight line L1 with the inner region 222 of the vane 220 centered on the separator plate 230 is the second bent formed with the outer region 223. It is formed smaller than the angle (θ2). Therefore, since the second bending angle θ2 is relatively larger in the radial direction (outer circumferential direction) compared to the first bending angle θ1, the outer area 223 of the vane 220 is steeper than the inner area 222. By being bent, the pumping pressure of the fluid can be increased. Experimental data related to this are explained based on the graph in FIG. 7.

Additionally, referring to FIG. 6B, the vane 220 has a chevron-shaped (V-shaped) bent shape when viewed from the outer tip. In addition, one side (eg, upper side) of the tip of the vane 220 is angled so that the two planes 224 face each other. At this time, the two planes 224 facing each other may be arranged at an equal angle based on the center line L2 in the thickness direction.

And, the other side (eg, lower side) of the tip of the vane 220 is formed so that the curved surface 225 faces the center line L2 in the thickness direction. Of course, both end regions on the other side of the tip may be partially flat, and may be arranged to face a flat surface rather than a curved surface on the other side of the tip.

In addition, the angle θ3 formed between one plane and the virtual straight line L2 formed in the thickness direction on one side of the tip of the vane 220 is preferably 30°. Of course, the angle θ3 can be added or subtracted within a set range considering the performance of the pump and the type or efficiency of the fluid.

Here, the top, bottom, and side surfaces of the vane 220 are all exposed within the above-described pumping space (see FIG. 2, 114). Accordingly, the structure of the upper housing (see FIG. 2, 110) can be optimized in which the inlet (see FIG. 2, 112) is located at the top and the outlet (see FIG. 2, 111) is located laterally.

Figure 7 is a graph showing a performance curve of a vehicle pump according to an embodiment of the present invention.

Referring to Figure 7, it is divided into a straight type expressed with circular points and light green, and a chevron type expressed with triangular points and purple, where the straight type refers to the prior art and the chevron type refers to the present invention.

As shown in the P-Q curve (performance curve), it can be seen that the flow rate and pressure of the straight graph are smaller than those of the chevron graph. In other words, it can be confirmed that the efficiency of the vehicle pump of the present invention with chevron-type vanes is increased, and performance is improved through reduction of flow loss.

Therefore, according to the impeller for a vehicle pump according to the present invention and a vehicle pump equipped with the same, the vanes provide a bent shape when the impeller is viewed from the plane, and provide a bent shape when viewed from the side, thereby moving fluid in the outward direction. The pressure required can be increased, and as the pressure of the impeller increases, the flow rate increases and the performance of the pump can be increased, and it has the effect of being lighter and more compact compared to the same performance.

In the above, specific embodiments have been shown and described to illustrate the technical idea of the present invention, but the present invention is not limited to the same configuration and operation as the specific embodiments as described above, and various modifications may be made without departing from the scope of the present invention. It can be carried out within. Accordingly, such modifications should also be considered as falling within the scope+ of the present invention, and the scope of the present invention should be determined by the claims described below.

100: Vehicle pump
110: upper housing
120: lower housing
130: driving unit
140: lower cover
200: Impeller

Claims (8)

hollow hub;
a plurality of vanes extending radially from the outer peripheral surface of the hub; and
a separator plate integrally connecting the center of the vane to the center of the outer peripheral surface of the hub; Including,
The top, bottom, and sides of the vane are all open and arranged to be exposed to the outside,
The vane is,
It includes an inner region disposed on the inside and an outer region disposed on the outside based on an imaginary connection line connecting the center of the bent region,
The inner region is formed to be relatively longer in length than the outer region,
The first bending angle formed by the virtual straight line and the inner region is formed to be relatively smaller than the second bending angle formed by the virtual straight line and the outer region,
An impeller for a vehicle pump, characterized in that the outer region extends further in the radial direction than the outermost edge of the separator plate. delete delete delete delete delete An upper housing having a cover coupled thereto with an intake port formed thereon and an outlet port formed on one side;
an impeller rotatably disposed inside the upper housing to flow fluid from the inlet to the outlet;
a lower housing coupled to the lower part of the upper housing and having a driving part provided therein to provide rotational force to the impeller; Including,
The top, bottom, and sides of the impeller are all open and exposed between the upper housing and the cover,
The impeller is,
With a hollow hub,
A plurality of vanes extending radially from the outer peripheral surface of the hub, and
It includes a separator plate integrally connecting the center of the vane to the center of the outer peripheral surface of the hub,
The vane is,
It includes an inner region disposed on the inside and an outer region disposed on the outside based on an imaginary connection line connecting the center of the bent region,
The inner region is formed to be relatively longer in length than the outer region,
The first bending angle formed by the virtual straight line and the inner region is formed to be relatively smaller than the second bending angle formed by the virtual straight line and the outer region,
A vehicle pump, characterized in that the outer region extends further in the radial direction than the outermost edge of the separator plate.
delete