Water pump with movable blades

Abstract

A water pump with movable blades comprises a pump body and an impeller. The impeller is arranged in the cavity of the pump body and is in transmission connection with a pump shaft of the pump body; the pump shaft is centrally arranged in the middle of the cavity; the impeller comprises an impeller shaft core and a plurality of blades; a shaft hole connected with a pump shaft is formed in the middle of the impeller shaft core, and a plurality of blade grooves distributed at equal intervals in the circumferential direction are formed in the periphery of the shaft hole of the impeller shaft core, extend in the radial direction and communicate with the circumferential wall of the impeller shaft core. The inner ends of the blades are inserted into the blade grooves respectively and can move in the blade grooves in the radial direction, and the outer ends of the blades can rotate along with the impeller and movably abut against the peripheral wall of the cavity under the action of centrifugal force. Each blade is tightly sealed with the peripheral wall of the cavity under the action of centrifugal force instead of elastic deformation, so that the friction force borne by the blades in the rotating process can be reduced, the working current of a pump body motor can be reduced, the power consumption of the motor is reduced, heat is reduced, and the service life of a product is effectively prolonged. And moreover, the blade material is not limited, and the application scene is wide.

Description

Technical Field

[0001] This utility model relates to the technical field of water pumps, and in particular to a water pump with movable blades. Background Technology

[0002] Currently, the impellers used in the market are all one-piece flexible impellers, such as the internal combustion engine cooling water pump disclosed in Chinese patent CN 201723493 U, which uses flexible blades. However, the impeller of this type of pump needs to frequently rub against the inner wall of the pump head cavity during use, requiring a large operating current and resulting in high power consumption. Furthermore, long-term wear also reduces the impeller's service life. At the same time, the flexible impeller's application scenarios are limited due to material limitations, making it unsuitable for pumping diesel, gasoline, strong acids, strong alkalis, pesticides, or fertilizers. Utility Model Content

[0003] The purpose of this invention is to provide a water pump with movable blades, which has the advantages of reducing power consumption, extending service life, and having a wide range of applications.

[0004] To achieve the above objectives, the solution of this utility model is:

[0005] A water pump with movable blades, comprising a pump body and an impeller;

[0006] The impeller is installed in the chamber of the pump body and is connected to the pump shaft of the pump body via a drive.

[0007] The chamber is circular, and there is a protrusion on the peripheral wall of the chamber. The peripheral walls on both sides of the protrusion are respectively provided with a first water inlet and a second water inlet that connect to the outside. The pump shaft is centrally located in the middle of the chamber.

[0008] The impeller includes an impeller shaft core and several blades; the impeller shaft core has a shaft hole in the middle that is connected to the pump shaft, and several circumferentially equally spaced blade grooves are provided on the outer periphery of the shaft hole of the impeller shaft core. The blade grooves extend radially and connect to the peripheral wall of the impeller shaft core, and the minimum distance between the inner end of the blade groove and the protrusion is not less than the blade length.

[0009] The inner ends of each blade are inserted into the blade slots and can move radially within the blade slots, while the outer ends of each blade can move and abut against the chamber wall under the action of centrifugal force as the impeller rotates.

[0010] Furthermore, the opening of the blade groove connected to the peripheral wall of the impeller shaft is a constricted opening; the inner end of the blade has a limiting part located in the blade groove, and the limiting part is limited outward to the constricted opening, while the blade body can movably extend out of the constricted opening.

[0011] Furthermore, an elastic element is provided between the inner end of the blade and the inner end of the blade groove, and the elastic element provides elastic force to resist the outward movement of the blade.

[0012] Furthermore, the inner end of the blade is recessed with several spaced first mounting holes along the axial direction of the impeller shaft core; the inner end of the blade groove is recessed with second mounting holes radially corresponding to each first mounting hole; the elastic element is a plurality of compression springs, and the two ends of each compression spring are respectively inserted between the radially spaced first mounting holes and second mounting holes.

[0013] Furthermore, the outer end of the blade has an enlarged cylindrical portion.

[0014] Furthermore, the blade groove extends through the two axial end faces of the impeller shaft core; there is a weight reduction groove between circumferentially adjacent blade grooves.

[0015] Furthermore, the shaft hole is a "D" shaped hole.

[0016] Furthermore, the blades are made of rubber, copper, stainless steel, or rigid plastic.

[0017] Furthermore, the impeller includes six blades that are circumferentially spaced.

[0018] Furthermore, the chamber is located at one end of the pump body, and the outer end face of the chamber has an opening; the impeller is installed into the pump shaft inside the chamber from the opening, and a cover plate is locked at the opening to seal the chamber.

[0019] With the above technical solution, when the impeller rotates, each blade rotates together with the impeller shaft within the chamber. Under centrifugal force, the outer ends of each blade can rotate close to the chamber wall. When a blade encounters a protruding part, it can retract using the blade groove, ensuring that the outer ends of the blades also move close to the protrusion. This ensures that each blade maintains a tight seal with the chamber wall during impeller rotation, giving the pump chamber self-priming capability. Therefore, because the blades are sealed against the chamber wall under centrifugal force, rather than through elastic deformation, the friction experienced during blade rotation is reduced, lowering the pump motor's operating current, power consumption, and heat generation, effectively extending product lifespan. Furthermore, the blades are radially extendable and movable within the blade groove; their material is no longer limited to rubber or polyurethane, but can also be copper, stainless steel, or rigid plastics. This allows for selection of blade materials appropriate for applications such as diesel, gasoline, strong acids, strong alkalis, pesticides, or fertilizers. Attached Figure Description

[0020] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0021] Figure 2 This is an exploded view of Embodiment 1 of the present invention;

[0022] Figure 3This is a cross-sectional view of Embodiment 1 of the present invention;

[0023] Figure 4 This is a front view of the hidden cover plate in Embodiment 2 of this utility model;

[0024] Figure 5 This is an exploded view of the impeller in Embodiment 2 of this utility model.

[0025] Labeling: Pump body 1, chamber 11, protrusion 111, opening 112, cover plate 113, first water inlet 12, second water inlet 13, pump shaft 14; impeller 2, impeller shaft core 21, shaft hole 211, blade groove 212, constriction 2121, second mounting hole 2122, weight reduction groove 213, blade 22, limiting part 221, blade body 222, cylindrical part 223, first mounting hole 224; elastic element 23, compression spring 231. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Example 1

[0028] like Figures 1 to 3 As shown, a blade-movable water pump according to this embodiment includes a pump body 1 and an impeller 2.

[0029] The impeller 2 is installed in the chamber 11 of the pump body 1 and is connected to the pump shaft 14 of the pump body 1; the impeller 2 is driven to rotate by the pump shaft 14 of the motor inside the pump body 1.

[0030] The chamber 11 is circular, and there is a protrusion 111 on the peripheral wall of the chamber 11. The peripheral walls of the chamber 11 on both sides of the protrusion 111 are respectively provided with a first water inlet 12 and a second water inlet 13 that connect to the outside. The pump shaft 14 is centrally located in the middle of the chamber 11.

[0031] The impeller 2 includes an impeller shaft core 21 and a plurality of blades 22; the impeller shaft core 21 has a shaft hole 211 in the middle that is connected to the pump shaft 14, and a plurality of circumferentially spaced blade grooves 212 are provided on the outer periphery of the shaft hole 211 of the impeller shaft core 21. The blade grooves 212 extend radially and communicate with the peripheral wall of the impeller shaft core 21. The minimum distance between the inner end of the blade groove 212 and the protrusion 111 is not less than the length of the blade 22; in order to prevent the blades 22 from getting stuck when the impeller 2 rotates.

[0032] The inner ends of each blade 22 are inserted into the blade grooves 212 and can move radially within the blade grooves 212, while the outer ends of each blade 22 can move and abut against the periphery of the chamber 11 under the action of centrifugal force as the impeller 2 rotates.

[0033] In this way, when the impeller 2 rotates, each blade 22 rotates together with the impeller shaft 21 in the chamber 11. Under the action of centrifugal force, the outer end of each blade 22 can rotate close to the circumferential wall of the chamber 11. When the blade 22 touches the protruding part 111, it can retract inward using the blade groove 212 to ensure that the outer end of the blade 22 can also move close to the protruding part 111. This ensures that when the impeller 2 rotates, each blade 22 can always be sealed with the circumferential wall of the chamber 11, so that the chamber 11 of the pump body 1 can have self-priming capability.

[0034] For example, see Figure 3 When the impeller 2 rotates clockwise as shown in the diagram, the first water inlet 12 on the left side of the protrusion 111 can be the water inlet, and the second water inlet 13 on the right side can be the water outlet; conversely, when the impeller 2 rotates counterclockwise, the first water inlet 12 on the left side of the protrusion 111 can be the water outlet, and the second water inlet 13 on the right side can be the water inlet, thus achieving bidirectional suction. Furthermore, the shape of the protrusion 111 can be adjusted as needed; however, this is not the focus of this improvement and will not be elaborated upon here.

[0035] Furthermore, since the blade 22 is sealed tightly against the periphery of the chamber 11 under centrifugal force rather than through elastic deformation, the frictional resistance experienced by the blade 22 during rotation can be reduced, thereby reducing the operating current of the pump body 1 motor, reducing motor power consumption, reducing heat generation, and effectively improving product lifespan.

[0036] Furthermore, the blade 22 is radially retractable and movable within the blade groove 212. Its material is no longer limited to rubber, polyurethane, or similar materials; it can also be made of copper, stainless steel, or rigid plastic, such as rigid polyurethane, POM, PA, or ABS plastic. This allows for the selection of blades 22 based on the application scenario, including applications involving diesel, gasoline, strong acids, strong alkalis, pesticides, or fertilizers.

[0037] In this embodiment, the opening of the blade groove 212 connected to the peripheral wall of the impeller shaft core 21 is a constriction 2121; the inner end of the blade 22 has a limiting part 221 located within the blade groove 212, and the limiting part 221 is limited outwardly by the constriction 2121, while the blade body 222 can movably extend out of the constriction 2121. The constriction 2121 facilitates the mounting of the blade 22, and the limiting part 221 can be cylindrical.

[0038] Meanwhile, the outer end of the blade 22 may have an enlarged cylindrical portion 223. That is, the diameter of the cylindrical portion 223 at the outer end of the blade 22 is greater than the width of the blade body 222. By providing the cylindrical portion 223, the contact area between the outer end of the blade 22 and the peripheral wall of the chamber 11 can be increased, thereby increasing the suction force of the pump and avoiding the blade 22 from being too thick.

[0039] In this embodiment, the blade groove 212 extends through both axial end faces of the impeller shaft core 21 to facilitate installation. A weight-reducing groove 213 may be provided between circumferentially adjacent blade grooves 212, and the weight-reducing groove 213 may also extend through both ends of the impeller shaft core 21 to reduce the weight of the impeller shaft core 21 and lower the motor power.

[0040] In this embodiment, the impeller 2 includes six circumferentially spaced blades 22. However, the number of blades 22 is not limited to this. The shaft hole 211 of the impeller 2 can be a "D" shaped hole to facilitate transmission connection with the pump shaft 14. Furthermore, the chamber 11 is located at one end of the pump body 1, and the outer end face of the chamber 11 has an opening 112; the impeller 2 can be conveniently installed and connected to the pump shaft 14 inside the chamber 11 through the opening 112, and a cover plate 113 is locked at the opening 112 to seal the chamber 11.

[0041] Example 2

[0042] like Figure 4 and Figure 5 As shown, the structure of this embodiment is basically the same as that of the above embodiments. The main difference is that an elastic element 23 is provided between the inner end of the blade 22 and the inner end of the blade groove 212 in this embodiment. The elastic element 23 provides a spring force to resist the outward movement of the blade 22. This ensures that the blade 22 is always sealed to the periphery of the chamber 11, further improving the pump's suction capacity.

[0043] Specifically, the inner end of the blade 22 may be recessed with a plurality of spaced first mounting holes 224 along the axial direction of the impeller shaft core 21. In this embodiment, each blade 22 has three first mounting holes 224 at its inner end; the inner end of the blade groove 212 may be recessed with second mounting holes 2122 corresponding to each of the first mounting holes 224 in a radial direction; the elastic element 23 may be a plurality of compression springs 231, with both ends of each compression spring 231 respectively inserted between the radially spaced first mounting holes 224 and second mounting holes 2122. This provides the elastic force.

[0044] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, equivalent changes and modifications without departing from the principle of this utility model should still fall within the protection scope of this utility model.

[0045] In the description of the embodiments of this application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0046] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" and "several" mean two or more, unless otherwise explicitly specified.

Claims

1. A water pump with movable blades, characterized in that: Includes pump body, chamber, and impeller; The impeller is installed in the chamber of the pump body and is connected to the pump shaft of the pump body via a drive. The chamber is circular, and there is a protrusion on the peripheral wall of the chamber. The peripheral walls on both sides of the protrusion are respectively provided with a first water inlet and a second water inlet that connect to the outside. The pump shaft is centrally located in the middle of the chamber. The impeller includes an impeller shaft core and several blades; the impeller shaft core has a shaft hole in the middle that is connected to the pump shaft, and several circumferentially equally spaced blade grooves are provided on the outer periphery of the shaft hole of the impeller shaft core. The blade grooves extend radially and connect to the peripheral wall of the impeller shaft core, and the minimum distance between the inner end of the blade groove and the protrusion is not less than the blade length. The inner ends of each blade are inserted into the blade slots and can move radially within the blade slots, while the outer ends of each blade can move and abut against the chamber wall under the action of centrifugal force as the impeller rotates.

2. A water pump with movable blades according to claim 1, characterized in that: The blade groove has an opening that connects to the peripheral wall of the impeller shaft core, which is a constricted opening; the inner end of the blade has a limiting part located within the blade groove, and the limiting part is limited outward to the constricted opening, while the blade body can movably extend out of the constricted opening.

3. A water pump with movable blades according to claim 1 or 2, characterized in that: An elastic element is provided between the inner end of the blade and the inner end of the blade groove, and the elastic element provides elastic force to resist the outward movement of the blade.

4. A water pump with movable blades according to claim 3, characterized in that: The inner end of the blade is recessed with several spaced first mounting holes along the axial direction of the impeller shaft core; the inner end of the blade groove is recessed with second mounting holes radially corresponding to each of the first mounting holes; the elastic element is a plurality of compression springs, and the two ends of each compression spring are respectively inserted between the radially spaced first mounting holes and second mounting holes.

5. A water pump with movable blades according to claim 1, characterized in that: The outer end of the blade has an enlarged cylindrical portion.

6. A water pump with movable blades according to claim 1, characterized in that: The blade groove extends through the two axial end faces of the impeller shaft core; there is a weight reduction groove between adjacent circumferential blade grooves.

7. A water pump with movable blades according to claim 1, characterized in that: The shaft hole is a "D" type hole.

8. A water pump with movable blades according to claim 1, characterized in that: The blades are made of rubber, copper, stainless steel, or hard plastic.

9. A water pump with movable blades according to claim 8, characterized in that: The impeller comprises six blades that are circumferentially spaced.

10. A water pump with movable blades according to claim 1, characterized in that: The chamber is located at one end of the pump body, and the outer end face of the chamber has an opening; the impeller is installed into the pump shaft inside the chamber from the opening, and a cover plate is locked at the opening to seal the chamber.

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