Spiral centrifugal impeller

Abstract

The utility model provides a spiral centrifugal impeller which comprises an impeller shaft and blades, the impeller shaft is a cone from top to bottom, and the blades are fixed to the bottom of the impeller shaft in a spiral mode. The bottom of the impeller shaft is located on the opposite side of the connecting position of the blades and the impeller shaft and further provided with a counter weight part in a downward protruding mode. According to the spiral centrifugal impeller, the counter weight part is arranged at the bottom of the impeller shaft and located on the side opposite to the connecting position of the blades and the impeller shaft in a downward protruding mode, so that the weight balancing effect with the blades on the other side is achieved through the counter weight part, mass distribution balance of the spiral centrifugal impeller is effectively achieved, and the service life is prolonged while the using effect is guaranteed; the counter weight part is arranged at the bottom of the impeller shaft and located on the opposite side of the connecting position of the blades and the impeller shaft in a downward protruding mode, so that the blocking effect on the impeller shaft is achieved to a certain degree, fluid media are prevented from directly impacting the impeller shaft, the impeller shaft is protected, and the service life of the impeller shaft is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of pump impellers, specifically to a spiral centrifugal impeller. Background Technology

[0002] The impeller rotates inside the pump to transport or pressurize the fluid medium. Due to its good fluid medium guiding effect, as well as its propulsive effect in both axial and radial directions and its resistance to clogging, the spiral centrifugal impeller has been widely used in fields such as dredging and cleaning.

[0003] In the prior art, helical blade impellers have been widely used in the pump field. For example, see patent application CN216199024U, published on April 5, 2022, which mentions an axial flow pump impeller using helical blades. Paragraph

[0018] of its specification states that "this utility model provides a technical solution: an axial flow pump impeller using helical blades, including a pump body 1 and helical blades 2"; see also patent application CN204284023U, published on April 22, 2015, which mentions a submersible sewage pump. Paragraph

[0010] of its specification states that "the lower end of the pump shaft 2 extends into the cylindrical tube 6 and is coaxially provided with a helical conical blade 7, the edge of which is provided with a cutting edge"; see also patent application CN216199024U, published on August 24, 2016. Patent application 05503443U mentions a screw pump with a conical helical blade cavity. Section

[0025] of its specification describes a screw pump with a helical blade cavity, comprising a geared motor and a connecting rod. The geared motor's transmission shaft drives the connecting rod to rotate. The front end of the connecting rod is connected to the screw pump rotor, which rotates. The screw pump rotor is located inside the screw pump stator, and the front end of the screw pump stator is connected to the discharge body. It also includes a suction chamber cavity 1, which is composed of a mixing tank and a conical extrusion chamber 4. A shaft end flange 3 is installed at the rear end of the mixing tank, and the front end of the mixing tank is connected to the large end of the conical extrusion chamber 4. The small end of the conical extrusion chamber 4 is connected to the rear end of the screw pump stator. The connecting rod 6 is located inside the mixing tank and the conical extrusion chamber, and a main helical blade 7 is provided on the connecting rod.

[0004] Existing technologies have also developed technical solutions for achieving impeller balance by adjusting counterweights. For example, see patent application CN105570185B, published on May 11, 2018, which mentions a single-channel pump impeller with a radial force balance disc. Section

[0002] of the specification states, "However, due to the asymmetrical structure of the single-channel pump, its mass is difficult to balance. Simultaneously, the pressure distribution around the impeller is asymmetrical during operation, resulting in significant hydraulic imbalance. This leads to a large residual radial force in the single-channel pump, compromising operational stability and affecting the pump's service life. Currently, manufacturers mainly use methods such as counterweighting and cutting on the impeller cover plate of the single-channel pump to achieve balance."

[0005] In existing technologies, spiral centrifugal impellers often include a spirally coiled blade structure from bottom to top. As the blade width and thickness gradually increase from bottom to top, the spiral centrifugal impeller itself has a certain degree of eccentricity. Therefore, during long-term operation, the impeller will deviate from the impeller shaft centerline, thus affecting the performance and reducing its service life. At the same time, because there is a blade obstruction on one side of the connection between the blade and the impeller shaft, the fluid will not directly impact the impeller shaft, while on the other side, where there is no blade obstruction, the fluid medium will directly impact the impeller shaft, which will also damage the impeller shaft.

[0006] Therefore, there is an urgent need to provide a solution to address the defects and shortcomings of the existing technologies. Summary of the Invention

[0007] In order to overcome the defects and shortcomings of the existing technology, this utility model provides a spiral centrifugal impeller.

[0008] The specific solution provided by this utility model is as follows:

[0009] A spiral centrifugal impeller includes an impeller shaft and blades, wherein the impeller shaft is a cone shaped from top to bottom, and the blades are fixed to the bottom of the impeller shaft in a spiral manner; characterized in that: a counterweight is also provided protruding downward at the bottom of the impeller shaft and on the side opposite to the connection position between the blades and the impeller shaft.

[0010] As a further preferred embodiment of the present invention, the blade includes a guide section, a spiral section and an outlet section connected in sequence, wherein the guide section is located below the spiral section and the outlet section is located above the spiral section.

[0011] As a further preferred embodiment of the present invention, the blades located at the same position in the circumferential direction are arranged with their bottoms flared outward relative to the axis of the impeller shaft.

[0012] As a further preferred embodiment of the present invention, the angle between the guide portion and the axis of the impeller shaft is 50°-60°, and the angle between the outlet portion and the axis of the impeller shaft is 30°-40°.

[0013] As a further preferred embodiment of the present invention, the axial angle of the blade guide section to the outlet section around the impeller shaft is 540°-630°.

[0014] As a further preferred embodiment of this utility model, the guide portion and the outlet portion are offset from each other.

[0015] As a further preferred embodiment of the present invention, the end of the counterweight is configured as a straight line and the bottom of the counterweight is configured as a curve.

[0016] As a further preferred embodiment of the present invention, the bottom of the counterweight is configured as an arc shape, and the counterweight is located axially at the position of the outflow section.

[0017] As a further preferred embodiment of the present invention, the downward convex distance of the counterweight gradually decreases in the direction from the radially outer side to the radially inner side until it is smoothly connected to the outer edge of the impeller shaft.

[0018] As a further preferred embodiment of this utility model, the counterweight is integrally formed with the impeller shaft.

[0019] Compared with existing technologies, the technical effects that this utility model can achieve include:

[0020] 1) This utility model provides a spiral centrifugal impeller. A counterweight is provided at the bottom of the impeller shaft and on the opposite side of the connection between the blade and the impeller shaft. The counterweight achieves the effect of equal weight distribution with the blade on the other side, thereby effectively achieving a balanced mass distribution of the spiral centrifugal impeller itself, thus ensuring the performance and extending the service life.

[0021] 2) This utility model provides a spiral centrifugal impeller. A counterweight is provided at the bottom of the impeller shaft and on the opposite side of the connection between the blade and the impeller shaft. This counterweight provides a certain degree of obstruction to the impeller shaft, preventing the fluid medium from directly impacting the impeller shaft itself and protecting the impeller shaft to extend its service life. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural view of the present invention.

[0023] Figure 2 This is a side view of the structure of this utility model.

[0024] Figure 3This is a bottom view of the structure of this utility model. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] [First Embodiment]

[0029] like Figure 1-3 The image shows a spiral centrifugal impeller according to the first embodiment of this utility model, including an impeller shaft 1 and blades 2. The impeller shaft 1 is a cone shape from top to bottom, and the blades 2 are fixed to the bottom of the impeller shaft 1 in a spiral manner; as shown Figure 1 As shown, the blades 2, which are located at the same position in the circumferential direction, are arranged with their bottoms extended outward relative to the axis of the impeller shaft 1, thereby extending the size of the blades 2 as much as possible to further improve the flow guiding effect.

[0030] like Figure 1-2 As shown, the blade in this embodiment includes a guide section 21, a spiral section 22, and an outlet section 23 connected in sequence. The guide section 21 is located below the spiral section 22, and the outlet section 23 is located above the spiral section. After the fluid medium enters the internal flow channel of the blade through the guide section 21, it passes through the spiral section 22 and is finally discharged from the outlet section 23.

[0031] To maximize the length of the flow channel and thus improve the guiding effect on the fluid medium, the guide section 21 and the outlet section 23 are staggered in the circumferential direction. As a preferred embodiment, the axial angle between the guide section 21 and the outlet section 23 of the blade 2 around the impeller shaft 1 is 540°-630°, the angle between the guide section 21 and the axis of the impeller shaft 1 is 50°-60°, and the angle between the outlet section 23 and the axis of the impeller shaft 1 is 30°-40°. The above parameters can also be adjusted according to the specific needs of the actual application to meet different fluid medium guiding requirements.

[0032] The key improvement of this embodiment compared to the prior art is that a counterweight 11 is provided at the bottom of the impeller shaft 1 on the opposite side of the connection between the blade 2 and the impeller shaft 1. By providing a counterweight at the bottom of the impeller shaft on the opposite side of the connection between the blade and the impeller shaft, the counterweight achieves a weight distribution with the blade on the other side, thereby effectively achieving a balanced mass distribution of the spiral centrifugal impeller itself, ensuring performance while extending service life. By providing a counterweight at the bottom of the impeller shaft on the opposite side of the connection between the blade and the impeller shaft, the counterweight also provides a certain degree of obstruction to the impeller shaft, preventing the fluid medium from directly impacting the impeller shaft itself, protecting the impeller shaft, and extending its service life.

[0033] Specifically, the end of the counterweight 11 is set to a straight shape, and the bottom of the counterweight 11 is set to a curved shape, preferably an arc shape, which facilitates molding while achieving good flexible contact with the fluid medium.

[0034] like Figure 2 As shown, the counterweight 11 is located in the axial direction at the outlet 23, and the downward protrusion of the counterweight 11 gradually decreases in the direction from the radial outer side to the radial inner side until it is smoothly connected to the outer edge of the impeller shaft 1, so as to achieve the effects of weight equalization and flow obstruction, while facilitating the smooth discharge of the fluid medium inside the flow channel.

[0035] Preferably, in this embodiment, the counterweight 11 is integrally formed with the impeller shaft 1 to facilitate processing and manufacturing.

[0036] The spiral centrifugal impeller provided in this embodiment has a counterweight protruding downwards at the bottom of the impeller shaft, on the opposite side of the connection between the blades and the impeller shaft. This counterweight achieves a weight distribution with the blades on the other side, effectively ensuring a balanced mass distribution within the spiral centrifugal impeller itself. This, in turn, guarantees performance while extending service life. Furthermore, the counterweight at the bottom of the impeller shaft, on the opposite side of the connection between the blades and the impeller shaft, provides a degree of obstruction to the impeller shaft, preventing the fluid medium from directly impacting it and protecting the impeller shaft, thus extending its service life.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A helical centrifugal impeller, comprising an impeller shaft (1) and blades (2), wherein the impeller shaft (1) is a cone-shaped structure extending from top to bottom, and the blades (2) are helically fixed to the bottom of the impeller shaft (1); characterized in that: The bottom of the impeller shaft (1) and the side opposite to the connection position between the blade (2) and the impeller shaft (1) are provided with a counterweight (11) protruding downward.

2. A spiral centrifugal impeller according to claim 1, characterized in that: The blade (2) includes a guide section (21), a spiral section (22) and an outlet section (23) connected in sequence. The guide section (21) is located below the spiral section (22), and the outlet section (23) is located above the spiral section.

3. A spiral centrifugal impeller according to claim 2, characterized in that: The blades (2) located at the same position in the circumferential direction are arranged with their bottoms flared outward relative to the axis of the impeller shaft (1).

4. A spiral centrifugal impeller according to claim 2, characterized in that: The angle between the guide section (21) and the axis of the impeller shaft (1) is 50°-60°, and the angle between the outlet section (23) and the axis of the impeller shaft (1) is 30°-40°.

5. A spiral centrifugal impeller according to claim 2, characterized in that: The axial angle of the blade (2) from the guide section (21) to the outlet section (23) around the impeller shaft (1) is 540°-630°.

6. A spiral centrifugal impeller according to claim 2, characterized in that: The guide section (21) and the outlet section (23) are misaligned.

7. A spiral centrifugal impeller according to claim 2, characterized in that: The end of the counterweight (11) is straight, and the bottom of the counterweight (11) is curved.

8. A spiral centrifugal impeller according to claim 7, characterized in that: The bottom of the counterweight (11) is set in an arc shape, and the counterweight (11) is located in the axial direction at the location of the outflow part (23).

9. A spiral centrifugal impeller according to claim 1, characterized in that: Along the radially outer side to the radially inner side, the downward convex distance of the counterweight (11) gradually decreases until it is smoothly connected to the outer edge of the impeller shaft (1).

10. A spiral centrifugal impeller according to claim 1, characterized in that: The counterweight (11) is integrally formed with the impeller shaft (1).

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