Water pump and impeller

Abstract

The utility model provides a water pump and an impeller, which comprise a hub and a plurality of blades arranged on the hub, and further comprise that each blade comprises a front surface and a back surface, a bulge is arranged on the front surface and / or the back surface, the bulge is provided with a starting end and a terminating end, and the terminating end is positioned at the tail section of the blade. Compared with the prior art, the protrusions are innovatively arranged on the front faces and / or the back faces of the blades, due to the design of the protrusions, water flow cannot be cut by the partition tongues at the same time when passing through and flowing out of the blades, impact of the water flow on the partition tongues is dispersed, the interaction between the water flow and the partition tongues tends to be gentle, periodic exciting force is weakened, and the service life of the blades is prolonged. Therefore, the vibration of the water pump is reduced, the erosion speed and degree of the fluid to the surface of the baffle tongue are also reduced, and the service life of the baffle tongue is further prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of pump, concretely relates to a water pump and impeller. BACKGROUND

[0002] The water flow in the pump body after leaving the blade tail section enters the pump body vortex chamber, and the water flow sent out by each blade cavity of the impeller is forcibly cut by the partition tongue, and the water outside the blade after cutting is forced to convert from kinetic energy to pressure energy and flows to the water outlet of the pump body.

[0003] However, in the working process, the water flow speed and pressure of the tail section of the front surface of the blade are large, so when the blade tip (i.e., the tail section of the blade) passes through the partition tongue, part of the water flow flowing to the water outlet of the pump body is suddenly cut off by the partition tongue. Figure 1 and Figure 2 As shown in the drawings, since the tail section of the blade and the partition tongue are both axial linear types, the water flow is cut off at the same time, and this simultaneous cutting causes the water flow and the partition tongue to collide violently in this area and thus forms a kind of exciting force on the pump body. This results in M (M is the number of blades) exciting forces being generated every revolution of the impeller, and as the impeller rotates at a speed of n, the exciting force generated causes the pump to vibrate at a frequency of n*M / 60. The partition tongue is long-term worked under this working condition, and the shape of the partition tongue is also easily damaged. SUMMARY

[0004] In order to overcome the above technical defects, the utility model provides a water pump and impeller which can solve the technical problem that the partition tongue is easily damaged in the prior art.

[0005] The utility model is realized according to the following technical scheme:

[0006] The utility model provides an impeller which comprises a hub and a plurality of blades arranged on the hub, and further comprises:

[0007] The blade comprises a front surface and a back surface, a convex ridge is arranged on the front surface and / or the back surface, the convex ridge has a starting end and an ending end, and the ending end is located at the tail section of the blade.

[0008] Compared with the prior art, the convex ridge is innovatively arranged on the front surface and / or the back surface of the blade, because of the design of the convex ridge, the water flow is not simultaneously cut by the partition tongue when passing through and flowing out of the blade, the impact of the water flow on the partition tongue is dispersed, the interaction between the water flow and the partition tongue tends to be gentle, the periodic exciting force is weakened, the vibration of the water pump is reduced, the erosion speed and degree of the fluid on the surface of the partition tongue are reduced, and the service life of the partition tongue is prolonged.

[0009] In an embodiment, a flow channel for water flow is formed between two adjacent blades.

[0010] The front surface of the blade is provided with at least one first convex ridge, which is arranged in a streamlined manner along the water flow direction of the flow passage in the length direction.

[0011] In an embodiment, the first convex ridge is arranged in a streamlined manner from the starting end to the terminal end;

[0012] The terminal end is the intersection position b of the end of the blade and the maximum outer circle of the impeller;

[0013] The starting end is located between the intersection position b and the position m of the front surface of the blade, wherein the position m is defined as the intersection position of the maximum cross section of the flow passage and the front surface of the blade.

[0014] In an embodiment, the front surface of the blade is provided with a first center line, which extends and distributes from the leading edge of the blade to the end of the blade;

[0015] The front surface of the blade is provided with a first convex ridge, which is arranged on the first center line from the starting end to the terminal end.

[0016] In an embodiment, the back surface of the blade is provided with at least one second convex ridge.

[0017] In an embodiment, the back surface of the blade is provided with a second center line, which extends and distributes from the leading edge of the blade to the end of the blade;

[0018] The back surface of the blade is provided with two second convex ridges, which are arranged symmetrically with respect to the second center line.

[0019] In an embodiment, the front surface of the blade is provided with a first convex ridge, and the back surface of the blade is provided with two second convex ridges, which are arranged in a staggered manner.

[0020] In an embodiment, the front surface of the blade is provided with a first center line, which extends and distributes from the leading edge of the blade to the end of the blade; and the first convex ridge is arranged on the first center line.

[0021] The back surface of the blade is provided with two second convex ridges, and the back surface of the blade is provided with a second center line, which extends and distributes from the leading edge of the blade to the end of the blade; and the two second convex ridges are arranged symmetrically with respect to the second center line.

[0022] In an embodiment, the convex ridge is arranged in a symmetric streamlined manner with respect to the center line of the convex ridge in the width direction.

[0023] The utility model also provides a water pump, it includes the impeller as described above. BRIEF DESCRIPTION OF DRAWINGS

[0024] The specific embodiments of the utility model will be further described in detail below with reference to the drawings, wherein:

[0025] Figure 1 is the schematic diagram of prior art water pump;

[0026] Figure 2 is the local schematic diagram of prior art partition tongue and blade;

[0027] Figure 3 is the schematic diagram of the water pump of the utility model;

[0028] Figure 4 is the local schematic diagram of the partition tongue and blade of the utility model;

[0029] Figure 5 is the perspective view of the impeller of example 1 of the utility model;

[0030] Figure 6 is the schematic diagram (partly shows section) of the impeller of example 1 of the utility model;

[0031] Figure 7 is the local schematic diagram of the impeller of example 1 of the utility model;

[0032] Figure 8 is the section view of the blade of example 1 of the utility model;

[0033] Figure 9 is the section view of the blade of example 2 of the utility model;

[0034] Figure 10 is the section view of the blade of example 5 of the utility model;

[0035] Figure 11 is the blade axial surface projection drawing of the utility model.

[0036] EXPLANATION OF REFERENCE NUMERALS:

[0037] 1 impeller, 10 hub, 20 blade, 202 end section, 210 front face, 211 first convex ridge, 2111 starting end, 2112 end, 220 back face, 221 second convex ridge, 30 partition tongue. DETAILED DESCRIPTION

[0038] The preferred embodiments of the utility model will be described below with reference to the drawings, and it should be understood that the preferred embodiments described here are only used for illustrating and explaining the utility model, and are not used for limiting the utility model.

[0039] In order to better illustrate the utility model, the utility model is further described in detail below with reference to the drawings.

[0040] It should be clear that the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the embodiments of the present application.

[0041] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0042] The following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. In the description of the present application, it should be understood that the terms "first", "second", "third" and the like are only used to distinguish similar objects, and do not necessarily describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In addition, in the description of the present application, "multiple" means two or more, unless otherwise specified. "And / or" describes the relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after are in an "or" relationship.

[0044] In the prior art, as shown in Figure 1 The impeller 1' is installed on the water pump, as shown in Figure 2 Because the blade end section and the tongue 30' are in axial linear type, the water flow is cut off at the same time, and this simultaneous cutting makes the water flow and the tongue collide violently in this area, thereby forming a vibration force on the pump body.

[0045] Example 1

[0046] In combination with Figures 3 to 8As shown, the present embodiment provides a kind of impeller 1, it includes hub 10 and the plurality of blades 20 arranged on hub 10, further include: the blade 20 includes front face 210 and reverse face 220, the convex ridge (i.e. the first convex ridge 211 referred to below in this embodiment 1) is equipped on the front face, the convex ridge has starting end and terminal end, and the terminal end is located in the end section of the blade.

[0047] Specifically, as Figure 3 As shown, the impeller of the present embodiment is applied to water pump, when the impeller works and rotates, because the convex ridge is equipped on the front face 210 of the end section 202 of the blade 20, as Figure 4 As shown, the end section of the blade 20 is non-axial linear mechanism, so that water flow is not cut simultaneously by the baffle 30 when passing and flowing out of the blade 20, disperses the impact of water flow to the baffle 30, so that the interaction between water flow and the baffle 30 tends to be gentle, periodic exciting force is weakened, and then the vibration of water pump is reduced, the erosion speed and degree of fluid to the surface of the baffle 30 are also reduced, and then the service life of the baffle 30 is prolonged.

[0048] In the present embodiment, the flow channel for water flow is formed between the two adjacent blades, the water flow flows into the pump body vortex chamber through the flow channel, and finally flows out through the water outlet; the front face of the blade is provided with at least one first convex ridge 211, and the first convex ridge is arranged in streamline shape along the water flow direction of the flow channel in length direction, which can reduce the influence of the first convex ridge 211 on the water flow in the flow channel.

[0049] Regarding the shape of the first convex ridge 211 on the front face 210 of the blade 20, in the present embodiment, the first convex ridge is provided with starting end and terminal end, and the first convex ridge is arranged in streamline shape from the starting end to the terminal end direction; the terminal end is the intersection position b of the end of the blade and the maximum outer circle of the impeller; the starting end is located between the intersection position b and the position m of the front face of the blade, wherein the position m is defined as the intersection position of the maximum cross section of the flow channel and the front face of the blade.

[0050] Specifically, the impeller includes hub 10 and a plurality of blades 20, the leading edge of the plurality of blades 20 is connected with the hub 10, and the plurality of blades 20 is arranged in circumferential distribution relative to the hub 10. As shown, when the first convex ridge 211 is located on the front face 210 of the blade 20, the first convex ridge 211 starts from the starting end 2111, takes the initial convex height 0 as the initial convex height, then gradually increases the convex height in streamline shape, until the convex height of the first convex ridge 211 is h when the intersection position b of the blade 20, at this time, the convex height h is the maximum convex height of the convex ridge.

[0051] It should be noted that, in relation to the middle position m of the blade 20, in order to avoid the first convex ridge 211 affecting the reasonable correspondence between the cross section of the flow channel and the length of the flow channel, preferably, the position m is defined as the intersection position of the maximum cross section of the flow channel and the front surface of the blade, and the position between the end section 202 of the back surface 220 of the previous blade 20 and the position m of the front surface 210 of the next blade 20 forms the maximum flow transverse cross section of the flow channel, that is, the middle position m of the front surface 210 of the blade 20 is defined by using the maximum flow transverse cross section of the flow channel.

[0052] The front surface of the blade is provided with a first center line, and the first center line extends and distributes from the leading edge of the blade to the end of the blade, and coincides with the blade center line in the blade axial plane projection view; the front surface of the blade is provided with a first convex ridge, and the shape of the end section 202 of the blade 20 is changed by using the least number of first convex ridges 211, so that the erosion speed and degree of the fluid on the surface of the baffle 30 are reduced, and the service life of the baffle 30 is prolonged; meanwhile, the design of a single first convex ridge 211 can reduce the production and manufacturing difficulty of the impeller. The first convex ridge is arranged on the first center line from the starting end to the ending end, and the middle convex design makes the interference effect relatively weak when the water flow of the end section 202 of the blade 20 passes through the baffle 30, so that the water flow exciting force is better reduced

[0053] In other embodiments, the front surface 210 of the blade 20 can also be designed to have multiple first convex ridges 211, and the multiple first convex ridges 211 cooperate and form a wave shape, further reducing the erosion speed and degree of the fluid on the surface of the baffle 30.

[0054] In the embodiment, as shown in the drawings, the convex ridge is arranged in a symmetrical streamline shape about the center line of the convex ridge in the width direction of the blade 20, and the convex ridge is designed in a streamline shape with high middle and low both sides, and smoothly transitions to the end section 202 of the blade 20. Preferably, the width of the end section 202 of the blade 20 is d, the protruding height of the convex ridge is h, and the height of the convex ridge and the width of the end section 202 of the blade 20 are in a relationship of 1 / 6≤h / d≤1 / 3.

[0055] The utility model also provides a water pump, it includes the above-mentioned impeller. In addition, the above-mentioned impeller can replace the old impeller and be assembled into the water pump, realize the upgrading of old products.

[0056] Embodiment 2

[0057] Combined Figure 9The difference between the present embodiment and embodiment 1 is that the shape of the convex ridge in the present embodiment is a straight line type about the middle line of the convex ridge, which is designed as a straight line type with high middle and low both sides and intersects with the end section 202 of the blade 20.

[0058] Embodiment 3

[0059] The difference between the present embodiment and embodiment 1 is that the shape of the convex ridge in the present embodiment is a straight line type about the middle line of the convex ridge, which is designed as a straight line type with high middle and low both sides and intersects with the end section 202 of the blade 20.

[0060] Embodiment 4

[0061] The difference between the present embodiment and embodiment 1 is that the impeller in the present embodiment, which comprises a hub 10 and a plurality of blades 20 arranged on the hub 10, further comprises: the blade 20 comprises a front surface 210 and a back surface 220, the back surface 220 is provided with a convex ridge (i.e. the second convex ridge 221 referred to below in the present embodiment 4), the convex ridge has a starting end and a terminal end, and the terminal end is located at the end section of the blade.

[0062] Specifically, the impeller of the present embodiment is applied to a water pump. When the impeller works and rotates, because the back surface 220 of the end section 202 of the blade 20 is provided with a convex ridge, the end section 202 of the blade 20 is designed as a non-axial straight line type mechanism, so that the water flow is not cut by the baffle 30 at the same time when passing through and flowing out of the blade 20, dispersing the impact of the water flow on the baffle 30, so as to make the interaction between the water flow and the baffle 30 tend to be gentle, weaken the periodic exciting force, and further reduce the vibration of the water pump, also reduce the erosion speed and degree of the fluid on the surface of the baffle 30, and further prolong the service life of the baffle 30.

[0063] Further, the back surface 220 of the blade 20 is provided with at least one second convex ridge 221. Preferably, the back surface 220 of the blade 20 is provided with two second convex ridges 221, which use the least number of second convex ridges 221 to change the shape of the end section 202 of the blade 20, reduce the erosion speed and degree of the fluid on the surface of the baffle 30, and prolong the service life of the baffle 30.

[0064] Further, the back surface of the blade is provided with a second middle line, which extends and distributes from the leading edge of the blade to the end of the blade; the back surface of the blade is provided with two second convex ridges, and the two second convex ridges are symmetrically arranged with respect to the second middle line.

[0065] Embodiment 5

[0066] In combination Figure 10As shown, the difference between the embodiment and embodiment 1 is that the front surface 210 of the blade 20 is provided with a first convex ridge 211, and the back surface 220 of the blade 20 is provided with a second convex ridge 221, and the first convex ridge 211 and the second convex ridge 221 are arranged in a staggered manner.

[0067] In the embodiment, the front surface 210 of the blade 20 is provided with a first center line, and the first center line extends from the leading edge of the blade 20 to the end of the blade 20; the number of the first convex ridge 211 is one, and the first convex ridge 211 is arranged on the first center line and coincides with the blade center line in the blade axial plane projection; the back surface 220 of the blade 20 is provided with a second center line, and the second center line extends from the leading edge of the blade to the end of the blade; the number of the second convex ridge 221 is two, and the two second convex ridges 221 are arranged symmetrically relative to the second center line, so as to better reduce the erosion speed and degree of the fluid on the surface of the baffle 30 and prolong the service life of the baffle 30.

[0068] According to the disclosure and teaching of the above description, the person skilled in the art of the utility model can also change and modify the above embodiments. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the utility model should also fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the utility model.

Claims

1. An impeller comprising a hub and a plurality of blades disposed on the hub, characterized in that, include: The blade includes a front side and a back side, and the front side and / or the back side are provided with a protrusion. The protrusion has a starting end and a ending end, and the ending end is located at the end of the blade.

2. The impeller of claim 1, wherein include: A flow channel for water flow is formed between two adjacent blades; The blade has at least one first protrusion on its front side, and the first protrusion is streamlined along the water flow direction of the flow channel in the length direction.

3. The impeller of claim 2, wherein include: The first convex ridge is streamlined from the starting end to the ending end. The termination point is the intersection point b between the end of the blade and the maximum outer circle of the impeller; The starting end is located between the intersection position b and the position m on the front of the blade, wherein the position m is defined as the intersection position of the maximum cross-section of the flow channel and the front of the blade.

4. The impeller of claim 2, wherein include: The blade has a first center line on its front surface, which extends from the leading edge of the blade toward the end of the blade. The blade has a first protrusion on its front side, and the first protrusion is located on the first centerline.

5. The impeller of claim 1, wherein include: The blade has at least one second protrusion on its reverse side.

6. The impeller of claim 5, wherein include: A second centerline is provided on the reverse side of the blade, and the second centerline extends from the leading edge of the blade toward the end of the blade. The blade has two second protrusions on its reverse side, and the two second protrusions are symmetrically arranged relative to the second centerline.

7. The impeller of claim 1, wherein include: The blade has a first protrusion on its front side and two second protrusions on its back side, with the first and second protrusions being offset from each other.

8. The impeller of claim 7, wherein include: The blade has a first center line on its front surface, which extends from the leading edge of the blade toward the end of the blade. The first convex ridge is disposed on the first centerline; The blade has two second protrusions on its reverse side and a second centerline on its reverse side. The second centerline extends from the leading edge of the blade toward the tip of the blade. The two second protrusions are symmetrically arranged relative to the second centerline.

9. The impeller of claim 1, wherein include: The shape of the protrusion in the width direction is a streamlined configuration that is symmetrical about the centerline of the protrusion.

10. A water pump characterized by comprising: Includes the impeller as described in any one of claims 1 to 9.

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