Impeller, electronic water pump and automobile

Abstract

The utility model relates to the technical field of electronic water pumps, in particular to an impeller, an electronic water pump and an automobile. An impeller comprises a wheel disc, a plurality of blades are arranged on the wheel disc, the blades are radially distributed from the center of the wheel disc to the edge of the wheel disc, any blade is bent in a radian mode, and the bending directions of all the blades are consistent. Any two adjacent blades are a first blade and a second blade respectively, and the direction from the second blade to the first blade is the bending direction of the blades; a preset area is arranged between the first blade and the second blade and located at the position close to the edge of the wheel disc and the first blade; a flow breaking column is arranged in the preset area and connected with the wheel disc. Compared with the prior art, the technical problem of how to reduce fluid vortex in a preset area between the first blade and the second blade in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pumps, in particular to an impeller, an electronic water pump and an automobile. Background Technique

[0002] In the process of designing various electronic water pumps, more attention is often paid to the optimization of the gap fluid between the impeller and the pump cover, and between the impeller and the isolation cover, while the fluid optimization inside the impeller is ignored. Because, during the process that the fluid is sucked in from the water inlet of the impeller and discharged from the water outlet of the impeller, the blades of the impeller play a very important pressure boosting role. In order for the fluid to absorb sufficient pressure kinetic energy, the longer the effective side length of the blades in the impeller, the greater the kinetic energy exerted by the blades on the fluid at the same rotational speed, the greater the pressure at which the fluid is discharged from the impeller outlet, and the stronger the performance. Therefore, the blades inside the impeller are often designed into a vortex structure with the center converging and the outside diffusing.

[0003] As Figure 1 shown, a single-fluid region of the impeller blades is taken for schematic description. Along the rotation direction, any two adjacent blades are respectively the first blade and the second blade; the impeller disc rotates, and the first blade and the second blade will also move clockwise around the center of the impeller disc.

[0004] There is a converging region and a diffusing region between the first blade and the second blade. The converging region is located at a position close to the impeller center between the first blade and the second blade, and the diffusing region is located at a position close to the disc edge between the first blade and the second blade; there is a preset region in the diffusing region, and the preset region is close to the first blade.

[0005] First, with the rotation of the impeller, the first blade and the second blade rotate synchronously clockwise. This rotation will produce a cutting action on the fluid located near the center of the impeller and outside the first blade and the second blade, so that this part of the fluid enters the gathering area between the first blade and the second blade from the inlet between the first blade and the second blade. With the continuous rotation of the impeller, the fluid near the center of the impeller and outside the first blade and the second blade continuously flows into the space between the first blade and the second blade from the inlet between the first blade and the second blade, so that the fluid that enters the gathering area first is subjected to the force F of the fluid that enters the gathering area later. At the same time, the rotation of the second blade will produce a force on the fluid in the gathering area. The resultant force of E, E and F is H. As the fluid flows, H is transferred from the gathering area to the diffusion area and becomes the force C. The force C generates a tangential force on the fluid in the preset area of ​​the diffusion area. The tangential force causes the fluid in the preset area of ​​the diffusion area to generate a vortex or even turbulence. The popular understanding of the vortex phenomenon is that the fluid spins in place, which will make the fluid in the preset area of ​​the diffusion area unable to be thrown out of the impeller in time before the second blade makes contact. Only when the second blade rotates to contact the fluid in the vortex in the preset area, the vortex fluid will be squeezed by the second blade and thrown out from the outlet of the first blade and the second blade away from the center of the impeller, thereby reducing the efficiency of the impeller fluid doing work.

[0006] In summary, in the prior art, how to reduce the vortex of the fluid in the preset area between the first blade and the second blade is a technical problem that needs to be solved. Utility Model Content

[0007] With regard to the prior art, how to reduce the vortex of the fluid in the preset area between the first blade and the second blade is a technical problem that needs to be solved. The utility model provides an impeller, an electronic water pump and a car.

[0008] The utility model is realized by the following technical solutions:

[0009] An impeller comprises a wheel disc, on which a plurality of blades are arranged, the plurality of blades are radially distributed from the center to the edge of the wheel disc, any blade is curved in an arc, and the curvature directions of all blades are consistent;

[0010] Any two adjacent blades are respectively a first blade and a second blade, and the direction from the second blade to the first blade is the bending direction of the blade; a preset area is set between the first blade and the second blade, and the preset area is located near the edge of the wheel disc and near the first blade;

[0011] A flow-breaking column is arranged at a preset area, and the flow-breaking column is connected to the wheel.

[0012] Further, in any preset area, the number of flow-breaking columns is several, and the several flow-breaking columns are distributed at intervals.

[0013] Further, in any preset area, the number of flow-breaking columns is three.

[0014] Further, an electronic water pump is also proposed, which includes the above-mentioned impeller.

[0015] Further, it includes a pump cover. The impeller is configured to be coaxial with the pump cover. One side surface of the neck of the pump cover facing the impeller is the first surface, and one side surface of the neck of the impeller facing the pump cover is the second surface. There is a gap between the first surface and the second surface;

[0016] The first surface is provided with a protrusion. The protrusion protrudes from the first surface towards the second surface, and the side of the protrusion facing the second surface is in clearance fit with the second surface.

[0017] Further, the number of protrusions is multiple, and the multiple protrusions are arranged at intervals;

[0018] Any two adjacent protrusions, and the part of the first surface located between the two adjacent protrusions, jointly limit to form a flow-intercepting groove, and the notch of the flow-intercepting groove faces the second surface.

[0019] Further, an automobile is also proposed, which includes the above-mentioned impeller.

[0020] Or it includes the above-mentioned electronic water pump.

[0021] Compared with the prior art, the advantages of the present utility model are as follows:

[0022] 1. Compared with the prior art, in the preset area on the wheel disc between the first blade and the second blade, the present utility model is provided with flow-breaking columns. On the one hand, the flow-breaking columns have an obstructive effect on the flow of the fluid. This obstructive effect can offset part or all of the tangential force received by the fluid, reducing the fluid vortex. On the other hand, the flow-breaking columns occupy the space of the preset area, enabling the fluid to form a vortex only in the remaining preset area outside the flow-breaking columns, thereby also reducing the volume of the fluid vortex. Therefore, the present utility model solves the technical problem in the prior art of how to reduce the fluid vortex in the preset area between the first blade and the second blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the force on the impeller fluid in the background art;

[0024] Figure 2 It is a schematic structural diagram of the impeller in Embodiment 1;

[0025] Figure 3 For Figure 2Schematic diagram of the forces acting on the fluid in the impeller;

[0026] Figure 4 Schematic diagram of the forces acting on the fluid around the flow-breaking column in Embodiment 1;

[0027] Figure 5 Schematic diagram of the partial structure of the electronic water pump in Embodiment 2;

[0028] Figure 6 For Figure 5 Schematic diagram of the structure of Region I in

[0029] Figure 7 Schematic diagram of the fluid flow direction in the flow-intercepting groove.

[0030] Markings in the figure: Disk (1), First blade (101), Second blade (102), Flow-breaking column (2)

[0031] Pump cover (3), Second surface (4), Protrusion (5), Flow-intercepting groove (6). Detailed implementation manners

[0032] The following further non-restrictive detailed description of the technical solution of the utility model is made in conjunction with the preferred embodiments and their accompanying drawings. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0033] Embodiment 1

[0034] As Figure 2As shown in the figure, this embodiment provides an impeller, which includes a wheel disc 1, on which a plurality of blades are arranged. The plurality of blades are radially distributed from the center of the wheel disc 1 to the edge. Any one blade is curved in an arc shape, and the bending directions of all the blades are the same. Any two adjacent blades are the first blade 101 and the second blade 102 respectively. The direction from the second blade 102 to the first blade 101 is the bending direction of the blade. A preset area is arranged between the first blade 101 and the second blade 102. The preset area is located at a position close to the edge of the wheel disc 1 and close to the first blade 101. A flow-breaking column 2 is arranged at the preset area, and the flow-breaking column 2 is connected to the wheel disc 1.

[0035] The wheel disc 1 is in a round cake-like structure, and its center has a mounting hole for connecting to the main shaft of an electronic water pump.

[0036] The blade is in a curved shape, and it is preferably integrally formed and connected with the wheel disc 1; the first blade 101 and the second blade 102 are radially distributed from the center of the wheel disc 1 to the edge, that is, from the center of the wheel disc towards the edge of the wheel disc, the first blade 101 and the second blade 102 gradually move away from each other.

[0037] The flow-breaking column 2 can be in the structure of a cylinder, a prism, a cone, etc. In this embodiment, the flow-breaking column 2 is in a cylinder structure; the flow-breaking column 2 and the surface of the wheel disc 1 can be connected by welding or integrally injection molded; preferably, in any preset area, the number of the flow-breaking columns 2 is several, and the several flow-breaking columns 2 are distributed at intervals; preferably, in any preset area, the number of the flow-breaking columns 2 is three.

[0038] As can be seen from the background technology, in the prior art, how to reduce the vortex of the fluid in the preset area between the first blade and the second blade is a technical problem to be solved.

[0039] As Figures 3 to 4 As shown in the figure, the impeller proposed in this solution can solve the above problems in the background technology, and the principle of solving the problems is as follows:

[0040] First, in the prior art, the acting force C generates a tangential force on the fluid in the preset area of the diffusion area, and this tangential force is the main factor that causes the fluid in the preset area to generate a vortex; the flow-breaking column provided in this embodiment is located in the preset area. During the process of the fluid passing through the flow-breaking column, the flow-breaking column has a blocking effect on the fluid, and this blocking effect will cause the flow-breaking column to generate an acting force M on the fluid. The direction of the acting force M is opposite to the direction of the acting force C. The acting force M can offset part or all of the acting force C, so that the tangential force received by the fluid in the preset area is reduced or even disappears, and thus the vortex generated by the fluid in the preset area can be reduced or even disappear.

[0041] Second, in the prior art, the vortices generated by the fluid rotate within a preset area; in this embodiment, a flow-breaking column is arranged within the preset area, and the flow-breaking column occupies the space of the preset area, reducing the area where the fluid can rotate. That is, for the fluid within the preset area in this embodiment, vortices can only be formed within the remaining preset area outside the flow-breaking column. Thus, in this embodiment, even if vortices are generated by the fluid, the volume of the fluid in the vortices is smaller than that in the prior art, which is more conducive to reducing the vortices.

[0042] In summary, compared with the prior art, in this embodiment, a flow-breaking column is arranged in the preset area between the first blade and the second blade on the disk. On the one hand, the flow-breaking column hinders the flow of the fluid, and this hindrance can offset part or all of the tangential force received by the fluid, reducing the fluid vortices. On the other hand, the flow-breaking column occupies the space of the preset area, enabling the fluid to form vortices only within the remaining preset area outside the flow-breaking column, thereby also reducing the volume of the fluid vortices. Therefore, this embodiment solves the technical problem in the prior art of how to reduce the fluid vortices in the preset area between the first blade and the second blade.

[0043] Turbulence, also known as turbulent flow, generally first generates vortices and then evolves from the vortices into turbulence. When the flow velocity increases, the streamlines are no longer clearly distinguishable, and many small vortices appear in the flow field, which is called turbulence; the impeller in this embodiment is conducive to reducing vortices, and correspondingly, it is also conducive to reducing the generation of turbulence.

[0044] Cavitation is the general term for the process of the gas nuclei in the fluid growing into bubbles, accumulating, flowing, splitting, and collapsing when the local pressure of the fluid in the flow channel drops to the critical pressure.

[0045] In the prior art, since the first blade and the second blade are radially distributed from the center to the edge of the disk, that is, from the center of the disk towards the edge of the disk, the first blade and the second blade gradually move away from each other, and the gap between the first blade and the second blade gradually increases. Correspondingly, the volume occupied by the diffusion area is larger than the volume occupied by the convergence area; after the fluid enters the diffusion area from the convergence area, as the first blade rotates, there will be a tendency to form a void on the back of the first blade, that is, at the preset area. This tendency will cause the fluid in this preset area to expand rapidly, and the fluid pressure to drop rapidly; on the other hand, the first blade has an adsorption effect on the fluid in the preset area, thereby exerting a force D on the fluid, and the force D will also cause the fluid in the preset area to expand rapidly and the fluid pressure to drop rapidly; thus, cavitation is formed.

[0046] In this embodiment, since a flow-breaking column is provided at the preset area, on the one hand, the flow-breaking column occupies a part of the volume of the preset area, so that the fluid in the preset area can only flow in the remaining area outside the flow-breaking column at the preset area, which reduces the space for accommodating the fluid in the preset area and inhibits the rapid expansion of the fluid; on the other hand, the flow-breaking column has a reaction force on the expanding fluid, and the direction of this reaction force is opposite to the acting force D, thereby canceling the adsorption effect of the acting force D on the fluid in the preset area, and then slowing down the rapid expansion of the fluid. Its principle is similar to the principle of avoiding vortex above; therefore, compared with the prior art, this embodiment can also reduce or avoid the occurrence of cavitation phenomenon.

[0047] Embodiment 2

[0048] This embodiment provides an electronic water pump, which includes the impeller of Embodiment 1.

[0049] As Figures 5 to 7 shown, further, the electronic water pump of this embodiment includes a pump cover 3. The impeller is configured to be coaxial with the pump cover 3. One surface of the neck of the pump cover 3 facing the impeller is the first surface, and one surface of the neck of the impeller facing the pump cover 3 is the second surface 4. There is a gap between the first surface and the second surface 4; a protrusion 5 is provided on the first surface, and the protrusion 5 protrudes from the first surface towards the second surface 4, and the side of the protrusion 5 facing the second surface is in clearance fit with the second surface 4.

[0050] Specifically, the gap existing between the first surface and the second surface 4, that is, the gap existing between the neck of the pump cover 3 and the neck of the impeller; a main shaft is provided in the electronic water pump, the impeller is sleeved on the main shaft, and the main shaft, the impeller, and the pump cover 3 are coaxial.

[0051] In the prior art, there is a gap between the neck of the pump cover and the neck of the impeller. This gap is located between the water outlet and the water inlet of the impeller. After the impeller rotates, it has a pressurizing function, so that the fluid pressure at the water outlet is greater than the fluid pressure at the water inlet. This results in that a part of the fluid pumped out from the water outlet of the impeller will flow back into the water inlet of the impeller from the gap between the neck of the pump cover and the neck of the impeller, which greatly reduces the output efficiency of the impeller and even the electronic water pump.

[0052] Therefore, there is still a technical problem in the prior art: after the fluid is pumped out from the water outlet of the impeller, how to reduce the flow rate of the fluid flowing back into the water inlet of the impeller from the gap between the neck of the pump cover and the neck of the impeller.

[0053] In this embodiment, the surface of the neck of the pump cover 3 facing the impeller is the first surface, and a protrusion 5 is provided on the first surface. The side of the protrusion 5 facing the second surface is in clearance fit with the second surface 4. On the one hand, the clearance fit between the protrusion 5 and the second surface 4 enables the protrusion 5 not to block the rotation of the impeller. On the other hand, the setting of the protrusion 5 reduces the size of the gap between the neck of the pump cover 3 and the neck of the impeller. After the fluid enters the gap between the neck of the pump cover 3 and the neck of the impeller, a part of the fluid impinges on the side of the protrusion 5 and is blocked by the protrusion 5, so as to achieve the purpose of reducing the flow rate of the fluid flowing back from the impeller water outlet to the impeller water inlet through the gap between the pump cover neck and the impeller neck.

[0054] Furthermore, after the fluid is pumped out from the water outlet of the impeller, how to reduce the flow velocity of the fluid flowing back from the gap between the pump cover neck and the impeller neck to the impeller water inlet is a technical problem to be solved, and this technical problem is solved by the following technical solution.

[0055] There are multiple protrusions 5, and the multiple protrusions 5 are arranged at intervals; any two adjacent protrusions 5 and a part of the first surface located between the two adjacent protrusions 5 jointly limit and form a cut-off groove 6, and the notch of the cut-off groove 6 faces the second surface 4.

[0056] In this embodiment, through the multiple protrusions 5 provided, multiple cut-off grooves 6 are formed on the side of the pump cover neck facing the impeller neck.

[0057] Take Figures 6 to 7 A schematic diagram is used as an example to illustrate the principle of solving the technical problem in this embodiment; when the fluid flows from the impeller water outlet towards the impeller water inlet and passes through the cut-off groove in the gap between the neck of the pump cover 3 and the neck of the impeller, due to the interaction force between the relative fluids, the fluid in this part of the gap will exert a force from right to left on the fluid in the cut-off groove. This force forces the fluid in the cut-off groove to move from right to left. After the fluid in the cut-off groove impinges on the left side wall of the cut-off groove, it will be bounced back by the left side wall, so that the fluid in the cut-off groove is forced to form a vortex shape. The vortex-shaped fluid in the cut-off groove rotates continuously. When this rotating fluid reaches the bottom of the cut-off groove, it will rush towards the fluid in the gap between the impeller neck and the pump cover neck. At this time, the force of the vortex-shaped fluid in the cut-off groove on the fluid in the gap between the impeller neck and the pump cover neck forms an obtuse angle or a right angle with the flow direction of the fluid in the gap between the impeller neck and the pump cover neck, thereby playing a role in blocking the fluid in the gap between the impeller neck and the pump cover neck, and thus reducing the flow velocity of the fluid in the gap between the impeller neck and the pump cover neck.

[0058] In the above process, since the pump cover is provided with multiple intercepting grooves, the interaction between the fluid in the gap between the impeller neck and the pump cover neck and the fluid in the intercepting grooves each time will reduce the flow rate of the fluid in the gap between the impeller neck and the pump cover neck, but will not completely block it. Repeating this process, the fluid in the gap between the impeller neck and the pump cover neck will eventually slowly reach the water inlet of the impeller, be pressurized again by the blades in the impeller, and finally be thrown out from the water outlet of the impeller.

[0059] Embodiment 3

[0060] A vehicle includes the impeller mentioned in Embodiment 1.

[0061] Or it includes the electric water pump in Embodiment 2.

[0062] The above embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. An impeller, characterized in that, It includes a roulette wheel (1), on which a number of blades are provided. The number of blades are radially distributed from the center of the roulette wheel (1) to the edge. Any one blade is curved in an arc, and the bending directions of all the blades are the same; Any two adjacent blades are respectively the first blade (101) and the second blade (102). The direction from the second blade (102) to the first blade (101) is the bending direction of the blade; A preset area is provided between the first blade (101) and the second blade (102), and the preset area is located at a position close to the edge of the roulette wheel (1) and close to the first blade (101); A flow-breaking column (2) is provided at the preset area, and the flow-breaking column (2) is connected to the roulette wheel (1).

2. The impeller according to claim 1, characterized in that, In any one preset area, the number of flow-breaking columns (2) is several, and several flow-breaking columns (2) are distributed at intervals.

3. The impeller according to claim 2, characterized in that, In any one preset area, the number of flow-breaking columns (2) is three.

4. An electronic water pump, characterized in that, It includes the impeller according to any one of claims 1-3.

5. The electric water pump according to claim 4, wherein, It includes a pump cover (3). The impeller is configured to be coaxial with the pump cover (3). The surface of one side of the neck of the pump cover (3) facing the impeller is the first surface. The surface of one side of the neck of the impeller facing the pump cover (3) is the second surface (4). There is a gap between the first surface and the second surface (4); The first surface is provided with a protrusion (5). The protrusion (5) protrudes from the first surface towards the second surface (4), and the side of the protrusion (5) facing the second surface is in clearance fit with the second surface (4).

6. The electric water pump according to claim 5, wherein The number of the protrusions (5) is multiple, and multiple protrusions (5) are arranged at intervals; Any two adjacent protrusions (5) and a part of the first surface located between the two adjacent protrusions (5) jointly limit and form a cut-off groove (6). The notch of the cut-off groove (6) faces the second surface (4).

7. An automobile, characterized in that, It includes the impeller according to any one of claims 1-3.

8. An automobile, characterized in that, It includes the electronic water pump according to any one of claims 4-6.

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