Closed impeller
By adopting the clamping method of inserting limit grooves and projections in the impeller, the problems of difficult and high cost in manufacturing of existing closed impellers are solved, and the stable structure and high clamping strength of the impeller are realized, which are suitable for a variety of equipment. .
Patent Information
- Application Number
- CN202421509025.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing closed impeller is difficult to manufacture and costly, and the dispensing or ultrasonic spot welding process is difficult to control, which can easily lead to loose parts.
The clamping method of embedded limit grooves and protrusions is adopted. By cooperating with the grooves on the blades, the impeller body and the closing cover are quickly fixed, eliminating the processing of dispensing or ultrasonic spot welding.
It realizes the stable structure of the impeller and high clamping strength, is simple to operate and low cost, and is suitable for equipment with any liquid inlet and outlet.
Smart Images
Figure CN222436654U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of impellers, and in particular relates to a closed impeller. Background Art
[0002] There are two main types of impellers: closed impeller and open impeller. Open impellers are more commonly used because they are easy to manufacture and have low costs. Closed impellers are less commonly used because, although they are highly efficient and can produce higher lifts, they are difficult to manufacture, cannot be demolded from the injection mold, and are costly.
[0003] The closed impeller is composed of blades and front and rear closed covers. In the prior art, the closed impeller is manufactured by using glue dispensing or ultrasonic hot melting to fix the front and rear closed covers of the closed impeller.
[0004] The method of gluing or ultrasonic spot welding increases the processing steps of the closed impeller, and the gluing process is difficult to control the glue amount and bonding strength. The ultrasonic spot welding process has strict requirements on welding materials. Specifically, the selected material must be a plastic material and the thickness should be greater than 0.5mm. The ultrasonic spot welding process will also cause the parts contained in the one-piece plastic to loosen. Utility Model Content
[0005] In order to solve the above technical problems, the technical solution of the utility model is: a closed impeller, comprising an impeller body, a closing cover fastened and fixed on the impeller body, the impeller body comprising a center piece, and a plurality of blades arranged on the center piece;
[0006] The closing cover comprises an annular cover plate, a plurality of buckle hooks are arranged around the outer circumference of the cover plate, a slot is opened on the plate body of the cover plate, and a plurality of limit grooves are arranged around the inner circumference of the cover plate;
[0007] The blade includes a top portion and an outer portion;
[0008] The outer side is provided with a first groove, and the buckle hook is buckled in the first groove;
[0009] The top is provided with a second groove, and a protrusion and a tip are formed after the second groove is provided, the protrusion is located on one side of the notch of the second groove, and the tip is located on the other side of the notch of the second groove, the protrusion is inserted into the slot hole, and the tip cooperates with the limiting groove.
[0010] Specifically, the cover plate gradually bulges toward its axis, and the bottom surface of the cover plate fits with the bottom of the second groove.
[0011] Specifically, the hook comprises a hook body and hook teeth, wherein the hook body extends vertically downward from the edge of the closing cover, and the hook teeth gradually thicken from the lower end of the hook body upward.
[0012] Specifically, the first groove includes a first notch formed by being recessed inward from the outer portion, and a second notch formed by continuing to expand inward from the lower end of the first notch, the hook body is embedded in the first notch, and the hook teeth are embedded in the second notch.
[0013] Specifically, the groove depth of the first notch is equal to the thickness of the hook body.
[0014] Specifically, the top surface of the hook tooth and the top surface of the second notch are both planes and fit together, and the inner wall of the hook tooth and the side wall of the second notch are both inclined surfaces and fit together.
[0015] Specifically, a metal reinforcement plate is provided at the bottom of the blade.
[0016] Compared with the prior art, the technical solution provided by the utility model has the following advantages:
[0017] The impeller, blades and closing cover are produced separately, and then the blades and closing cover of the impeller are quickly and simply fixed by embedding and limiting, and buckling up and down, eliminating the need for gluing or ultrasonic spot welding. After buckling, the overall structure of the impeller is stable, the buckling strength is high, the operation is simple, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is an exploded view of the closed impeller in the utility model;
[0019] Figure 2 It is an axial cross-sectional view of the closed impeller in the utility model.
[0020] As shown in the figure: 1. impeller body; 11. center piece; 12. blades; 121. first groove; 122. second groove; 123. raised portion; 124. tip; 13. metal reinforcing plate; 2. closing cover; 21. cover plate; 22. hook; 23. limiting groove; 24. slot hole. DETAILED DESCRIPTION
[0021] For ease of understanding, the closed impeller is described below in conjunction with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.
[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] like Figure 1 to Figure 2 As shown, the closed impeller in this embodiment includes an impeller body 1 and a closing cover 2 that is fastened and fixed on the impeller body 1, and the impeller body 1 and the closing cover 2 are coaxial; the impeller body 1 includes a center piece 11, six blades 12 arranged on the center piece 11, and a metal reinforcing plate 13 arranged at the bottom of the blades 12, an axial hole is arranged in the middle of the center piece 11, and an annular groove is opened on the outside, and the metal reinforcing plate 13 is a circular ring plate with the inner circumference embedded in the annular groove.
[0025] like Figure 1 As shown, the blade 12 includes a bottom fixedly connected to the metal reinforcing plate 13, a top arranged opposite to the bottom, an inner side portion close to the axis of the impeller body 1, and an outer side portion arranged opposite to the inner side portion, wherein the outer side portion is provided with a first groove 121, the first groove 121 includes a first notch formed by inward depression from the surface of the outer side portion, and a second notch formed by continuously expanding inward from the lower end of the first notch, and the groove depth of the second notch gradually decreases from top to bottom. A second groove 122 is provided at the top, and a protrusion 123 and a tip 124 are formed after the second groove 122 is provided, the protrusion 123 is located outside the notch of the second groove 122, and the tip 124 is located inside the notch of the second groove 122.
[0026] like Figure 1As shown, the closing cover 2 includes a circular cover plate 21 and six hooks 22 arranged around the cover plate 21, wherein the cover plate 21 gradually bulges toward its axis, and a circular hole coaxial with the cover plate 21 is provided in the middle of the cover plate 21, and six limiting grooves 23 are provided around the circular hole, and a slot 24 is provided at the edge of the cover plate 21 near the hook 22, with a total of six slots 24. The hook 22 includes a hook body and hook teeth, wherein the hook body extends vertically downward from the edge of the closing cover 2, and the hook teeth gradually thicken from the lower end of the hook body upward.
[0027] like Figure 1 to Figure 2 As shown, a protrusion 123 is inserted into the slot 24, the top surface of the protrusion 123 smoothly transitions with the upper surface of the cover plate 21 around the slot 24, the limiting groove 23 and the tip 124 cooperate with each other, the plate body part of the cover plate 21 between the slot 24 and the limiting groove 23 is embedded in the second groove 122, the groove depth of the second groove is equal to the thickness of the cover plate 21, and the bottom surface of the cover plate 21 fits with the groove bottom of the second groove 122.
[0028] Continue as Figure 1 to Figure 2 As shown, the six hooks 22 are buckled into the first groove 121 one by one. Specifically, the hook body is embedded in the first groove, and the groove depth of the first groove is equal to the thickness of the hook body. That is to say, after the hook 22 is buckled into the first groove 121, the hook body and the first groove are completely consistent, and the outer surface of the hook 22 is connected with the outer surface of the outer side; the hook teeth are embedded in the second groove, the top surface of the hook teeth and the top surface of the second groove are both flat and fit each other, and the inner wall of the hook teeth and the side wall of the second groove are both inclined and fit each other.
[0029] In this embodiment, the closed impeller is made of a closed cover 2 and an impeller body 1 separately, and then the closed cover 2 and the impeller body 1 are fixed by a buckle hook 22 that is buckled into the first groove 121, and the cover plate 21 is embedded in the second groove 122. The buckling strength is high and no glue is required. The manufactured closed impeller is suitable for any liquid inlet and outlet method and is not limited to use in water pumps, centrifugal fans, sweepers and vacuum cleaners.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A closed impeller, characterized in that: It comprises an impeller body and a closing cover fastened and fixed on the impeller body, wherein the impeller body comprises a center piece and a plurality of blades arranged around the center piece; The closing cover comprises an annular cover plate, a plurality of buckle hooks are arranged around the outer circumference of the cover plate, a slot is opened on the plate body of the cover plate, and a plurality of limit grooves are arranged around the inner circumference of the cover plate; The blade includes a top portion and an outer portion; The outer side is provided with a first groove, and the buckle hook is buckled in the first groove; The top is provided with a second groove, and a protrusion and a tip are formed after the second groove is provided, the protrusion is located on one side of the notch of the second groove, and the tip is located on the other side of the notch of the second groove, the protrusion is inserted into the slot hole, and the tip cooperates with the limiting groove.
2. The closed impeller according to claim 1, characterized in that: The cover plate gradually bulges toward its axis, and the bottom surface of the cover plate fits with the bottom of the second groove.
3. The closed impeller according to claim 1, characterized in that: The buckle hook comprises a hook body and hook teeth, wherein the hook body vertically extends downward from the edge of the closing cover, and the hook teeth gradually thicken from the lower end of the hook body upward.
4. The closed impeller according to claim 3, characterized in that: The first groove includes a first notch formed by inward depression from the outer portion, and a second notch formed by continuously expanding inward from the lower end of the first notch. The hook body is embedded in the first notch, and the hook teeth are embedded in the second notch.
5. The closed impeller according to claim 4, characterized in that: The groove depth of the first notch is equal to the thickness of the hook body.
6. The closed impeller according to claim 4, characterized in that: The top surface of the hook tooth and the top surface of the second notch are both planes and fit together, and the inner wall of the hook tooth and the side wall of the second notch are both inclined surfaces and fit together.
7. The closed impeller according to claim 1, characterized in that: A metal reinforcement plate is arranged at the bottom of the blade.