Cutting impeller
By designing a spiral centrifugal impeller, the contact area between the blades and the fluid medium and the flow channel space are increased, solving the problems of low cutting efficiency and wear of existing impellers, and achieving efficient flow guidance and extended service life.
Patent Information
- Application Number
- CN202423257879.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing impellers have poor cutting efficiency and are prone to wear when processing fluid media containing large solid particles, resulting in poor flow guidance and short service life.
Design a spiral centrifugal impeller with the blade guide section flush with the bottom of the impeller shaft and the outlet section set at an acute angle to the axis, increasing the contact area with the fluid medium, and optimizing the blade structure to increase the internal flow channel space.
It improves the flow guidance effect of fluid media and the cutting efficiency of solid impurities, while extending the service life of the blades.
Smart Images
Figure CN223511175U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of pump impeller, concretely relates to a cutting impeller. BACKGROUND
[0002] The impeller rotates in the pump to realize the delivery of fluid medium or the pressurization of fluid medium, and since the sewage medium often contains large-particle solid impurities, the large-particle solid impurities need to be cut into small-particle solid impurities by the impeller while the fluid medium is delivered, and then discharged through the pump body.
[0003] The impeller for realizing the cutting function in the prior art often sets the blade into a radially outward expanding shape from top to bottom, and the small contact area with the fluid medium results in poor flow guiding effect and poor cutting efficiency of the blade on the solid impurities in the fluid medium, and in addition, since the bottom end of the blade needs to be in long-time concentrated contact with the solid impurities in the fluid medium, the bottom end of the blade is prone to wear, thereby affecting the service life of the blade.
[0004] Therefore, it is urgent to provide a scheme to solve the defects and deficiencies in the prior art. SUMMARY
[0005] In order to solve the defects and deficiencies in the prior art, the utility model provides a spiral centrifugal impeller.
[0006] The utility model provides a specific scheme:
[0007] A cutting impeller, comprising an impeller shaft and a cover body fixed to the outer periphery of the impeller shaft, a blade is fixed to the bottom of the cover body, the blade is arranged in a radially outward expanding manner, the blade comprises a flow guiding part, a connecting part and an outflow part, the flow guiding part is fixed to the bottom of the connecting part and fixedly connected with the bottom of the impeller shaft, the outflow part is fixed to the top of the connecting part and fixedly connected with the bottom of the cover body, characterized in that: the bottom end of the flow guiding part is flush with the bottom end of the impeller shaft, and the outflow part is arranged at an acute angle with the axis of the impeller shaft.
[0008] As a further preferred embodiment of the utility model, the impeller shaft is in an inverted conical structure with the upper part being larger and the lower part being smaller.
[0009] As a further preferred embodiment of the utility model, the cover body is fixed to the outer periphery of the middle part of the impeller shaft, and the two ends of the impeller shaft respectively pass through the cover body from the two sides in an axial direction.
[0010] As a further preferred embodiment of the utility model, the blade is provided with two pieces, and is arranged in a central symmetry along the axis of the impeller shaft.
[0011] As a further preferred embodiment of the utility model, the flow guide part is symmetrically arranged on both sides of the outer edge of the impeller shaft.
[0012] As a further preferred embodiment of the utility model, the outflow part is symmetrically arranged on both sides of the outer edge of the impeller shaft and is arranged in a staggered manner with the flow guide part.
[0013] As a further preferred embodiment of the utility model, the angle between the outflow part and the axis of the impeller shaft is 15-20 degrees.
[0014] As a further preferred embodiment of the utility model, the angle between the outflow part and the axis of the impeller shaft is 15-20 degrees.
[0015] As a further preferred embodiment of the utility model, the blade is arranged in an outwardly expanding shape with the upper part being smaller and the lower part being larger.
[0016] As a further preferred embodiment of the utility model, the thickness of the blade gradually increases from bottom to top.
[0017] Compared with the prior art, the utility model can achieve the following technical effects:
[0018] 1) The cutting impeller provided by the utility model increases the contact area with the fluid medium by arranging the bottom end of the blade flow guide part to be flush with the bottom end of the impeller shaft and arranging the blade outflow part to be at an acute angle with the axis of the impeller shaft, thereby increasing the internal flow passage space and further improving the flow guiding effect on the fluid medium.
[0019] 2) The cutting impeller provided by the utility model increases the contact area with the fluid medium by arranging the bottom end of the blade flow guide part to be flush with the bottom end of the impeller shaft and arranging the blade outflow part to be at an acute angle with the axis of the impeller shaft, thereby increasing the contact cutting possibility of the blade and the solid impurities in the fluid medium, and further improving the cutting efficiency of the solid impurities in the fluid medium.
[0020] 3) The cutting impeller provided by the utility model increases the contact area with the fluid medium by arranging the bottom end of the blade flow guide part to be flush with the bottom end of the impeller shaft and arranging the blade outflow part to be at an acute angle with the axis of the impeller shaft, thereby causing the blade bottom end to be uniformly stressed, avoiding long-term concentrated contact of the blade bottom end and the solid impurities in the fluid medium, which may cause wear of the blade bottom end, and further prolonging the service life of the blade. BRIEF DESCRIPTION OF DRAWINGS
[0021] Fig. 1 It is a structural perspective view of the utility model.
[0022] Fig. 2 It is a structural side view of the utility model.
[0023] Fig. 3 This is a bottom view of the structure of this utility model. Detailed Implementation
[0024] 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.
[0025] 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.
[0026] 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.
[0027] [First Embodiment]
[0028] like Figs. 1-3 The first embodiment of the present invention provides a cutting impeller, including an impeller shaft 1 and a cover 2 fixed to the outer periphery of the impeller shaft 1. The impeller shaft 1 has an inverted conical structure that is larger at the top and smaller at the bottom in order to provide a space for the cover 2 and blades 3. The cover 2 is fixedly sleeved on the middle of the outer periphery of the impeller shaft 1, and the two ends of the impeller shaft 1 extend axially from both sides of the cover 2.
[0029] Two blades 3 are fixed at the bottom of the cover 2 and are arranged symmetrically along the axis of the impeller shaft 1 to achieve uniform flow guidance and cutting effect on both sides. In the radial direction, the blades 3 are arranged radially outward to facilitate fluid guidance, while in the axial direction, the blades 3 are arranged in an outward expansion shape with a smaller top and a larger bottom. Specifically, the rotation angle of each blade around the impeller shaft 1 is set to 180°-270° to maximize the internal flow channel space and improve the guiding efficiency.
[0030] The blade 3 includes a guide section 31, a connecting section 32, and an outlet section 33. The guide section 31 is fixed to the bottom of the connecting section 32 and is fixedly connected to the bottom of the impeller shaft 1. The outlet section 33 is fixed to the top of the connecting section 32 and is fixedly connected to the bottom of the cover 2. The improvement of this embodiment compared with the prior art is that the bottom end of the guide section 31 is flush with the bottom end of the impeller shaft 1, and the outlet section 33 is set at an acute angle with the axis of the impeller shaft 1. In this embodiment, the acute angle between the outlet section 33 and the axis of the impeller shaft 1 is preferably set to 15°-20°, and the thickness of the blade 3 gradually widens from bottom to top to form a cutting effect at the bottom of the blade.
[0031] As a further preferred embodiment, the flow guide 31 is symmetrically arranged on both sides of the outer edge of the impeller shaft 1, and the outlet 33 is symmetrically arranged on both sides of the outer edge of the impeller shaft 1 and is staggered with the flow guide 31, so as to achieve uniform flow guidance on both sides while avoiding the concentrated arrangement of flow guide and outlet.
[0032] This embodiment provides a cutting impeller. By setting the bottom end of the blade guide portion flush with the bottom end of the impeller shaft and setting the blade outlet portion at an acute angle to the axis of the impeller shaft, the contact area with the fluid medium is increased, and the internal flow channel space is also increased, thereby further improving the guiding effect on the fluid medium. By increasing the contact area with the fluid medium, the possibility of contact and cutting of solid impurities in the fluid medium by the blade is increased, thereby further improving the cutting efficiency of solid impurities in the fluid medium. In addition, by increasing the contact area with the fluid medium, the bottom end of the blade is subjected to uniform force, thereby avoiding prolonged concentrated contact between the bottom end of the blade and solid impurities in the fluid medium, which may cause wear to the bottom end of the blade, and further extending the service life of the blade.
[0033] 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 cutting impeller, comprising an impeller shaft (1) and a cover (2) fixed to the outer periphery of the impeller shaft (1), wherein blades (3) are fixed at the bottom of the cover (2), the blades (3) being radially outwardly oriented, the blades (3) comprising a guide portion (31), a connecting portion (32), and an outlet portion (33), the guide portion (31) being fixed to the bottom of the connecting portion (32) and fixedly connected to the bottom of the impeller shaft (1), the outlet portion (33) being fixed to the top of the connecting portion (32) and fixedly connected to the bottom of the cover (2), characterized in that: The bottom end of the guide section (31) is flush with the bottom end of the impeller shaft (1), and the outlet section (33) is set at an acute angle to the axis of the impeller shaft (1).
2. A cutting impeller according to claim 1, characterized in that: The impeller shaft (1) has an inverted conical structure that is larger at the top and smaller at the bottom.
3. A cutting impeller according to claim 1, characterized in that: The cover (2) is fixedly sleeved on the middle of the outer periphery of the impeller shaft (1), and the two ends of the impeller shaft (1) axially protrude from both sides of the cover (2).
4. A cutting impeller according to claim 1, characterized in that: The blade (3) has two blades, which are arranged in a centrally symmetrical manner along the axis of the impeller shaft (1).
5. A cutting impeller according to claim 4, characterized in that: The guide section (31) is symmetrically arranged on both sides of the outer edge of the impeller shaft (1).
6. A cutting impeller according to claim 5, characterized in that: The outflow section (33) is symmetrically arranged on both sides of the outer edge of the impeller shaft (1) and is offset from the flow guide section (31).
7. A cutting impeller according to claim 1, characterized in that: Each blade rotates at an angle of 180°-270° around the impeller shaft (1).
8. A cutting impeller according to claim 1, characterized in that: The acute angle between the outlet section (33) and the axis of the impeller shaft (1) is 15°-20°.
9. A cutting impeller according to claim 1, characterized in that: The blade (3) is configured to be outwardly flared with a smaller top and a larger bottom.
10. A cutting impeller according to claim 1, characterized in that: The thickness of the blade (3) gradually increases from bottom to top.