Large carbon fiber composite centrifugal pump

Abstract

The utility model discloses a large carbon fiber composite centrifugal pump, which relates to the technical field of centrifugal pumps and comprises an impeller comprising an impeller body. A plurality of through holes are formed in the impeller body, and a plurality of buckles are fixedly arranged on the impeller body; and an impeller carbon fiber layer is arranged on the impeller body. According to the large carbon fiber composite centrifugal pump, the metal part is stable in structure, the carbon fiber layer cannot crack, and even if the carbon fiber layer cracks, the carbon fiber layer cannot fall off. The open holes in the impeller reduce the expansion stress and increase the combination reliability of the two materials. A buckle is arranged on the surface of the impeller, so that the carbon fiber layer is stably and firmly combined with the stainless steel blades. In the operation process, the stainless steel core provides a stable-strength shape, the carbon fiber layer is responsible for resisting corrosion, abrasion and medium scouring and abrasion, and the service life of the pump is prolonged through combination of the two.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, and in particular to a large carbon fiber composite centrifugal pump. Background Technology

[0002] Materials used in chemical production plants are generally highly corrosive and abrasive. Centrifugal pumps are typically used for transporting liquid media, such as pumps for phosphoric acid slurry, phosphoric acid, and sulfuric acid. These pumps are typically made of corrosion-resistant materials like 316L, 904L, and CD4Mu, but their abrasion resistance is limited, and there's little room for improvement with metallic materials. Among non-metallic materials, carbon fiber has high hardness and good corrosion resistance, but it's brittle and can only be used to manufacture small centrifugal pumps, currently reaching a maximum of 160KW. Many 500KW centrifugal pumps in production systems also have short service lives. Manufacturing carbon fiber pumps based on the structure of small centrifugal pumps results in insufficient strength and easy breakage. Therefore, there is an urgent need for a large-scale carbon fiber composite centrifugal pump that is low-cost to manufacture and easy to use. Summary of the Invention

[0003] The purpose of this invention is to provide a large-scale carbon fiber composite centrifugal pump, which effectively solves the problem of the difficulty in scaling up carbon fiber centrifugal pumps.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a large carbon fiber composite centrifugal pump, including an impeller, the impeller including an impeller body; the impeller body is provided with a plurality of through holes, and / or, the impeller body is fixedly provided with a plurality of buckles; the impeller body is provided with an impeller non-metallic layer.

[0006] Optionally, the impeller body is made of metal.

[0007] Optionally, the clip is welded and fixed to the impeller body.

[0008] Optionally, the impeller is a closed impeller.

[0009] Optionally, it also includes a front guard plate and a rear guard plate, the front guard plate and the rear guard plate being respectively located in front of and behind the impeller.

[0010] Optionally, both the front guard plate and the rear guard plate include a guard plate metal layer and a guard plate carbon fiber layer, and the guard plate carbon fiber layer is located on the side facing the impeller.

[0011] Optionally, the surface of the metal layer of the protective plate is provided with buckles.

[0012] Optionally, it may also include a sheath, which includes a metal layer, a transition layer and a sheath carbon fiber layer arranged sequentially from the outside to the inside.

[0013] Optionally, the impeller non-metallic layer is an impeller carbon fiber layer.

[0014] Optionally, the impeller body is made of stainless steel.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] This utility model relates to a large-scale carbon fiber composite centrifugal pump. The metal structure is stable, and the carbon fiber layer will not crack; even if it does crack, it will not detach. The openings on the impeller reduce expansion stress and increase the reliability of the bond between the two materials. The impeller is a closed-type design, with stainless steel reinforcing bars welded to its surface, ensuring a stable and secure bond between the carbon fiber layer and the stainless steel blades. Both the front and rear protective plates consist of steel components and a carbon fiber coating, also reinforced with welded reinforcing bars. The sheath is constructed as a single carbon fiber structure, encased in a steel structure. A transition layer between the carbon fiber layer and the metal shell absorbs thermal expansion differences and pump vibrations. During operation, the stainless steel core provides strength and shape stability, while the carbon fiber layer resists corrosion and abrasion from the media; the combination of these two elements extends the pump's service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the large carbon fiber composite centrifugal pump of this utility model;

[0019] Figure 2 This is a schematic diagram of the front guard plate in the large carbon fiber composite centrifugal pump of this utility model;

[0020] Figure 3 This is a side cross-sectional view of the impeller in the large carbon fiber composite centrifugal pump of this utility model.

[0021] Figure 4 This is a schematic diagram of the main cross-sectional structure of the impeller in the large carbon fiber composite centrifugal pump of this utility model;

[0022] Figure 5 This is a schematic diagram of the sheath structure in the large carbon fiber composite centrifugal pump of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Rear guard plate; 2. Front guard plate; 3. Impeller; 4. Sheath;

[0025] 21. Metal layer of protective plate; 22. Carbon fiber layer of protective plate;

[0026] 31. Impeller body; 32. Clip; 33. Impeller carbon fiber layer; 34. Through hole;

[0027] 41. Metal layer; 42. Transition layer; 43. Sheath carbon fiber layer. Detailed Implementation

[0028] 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.

[0029] Due to the unavoidable corrosion, abrasion, and high temperatures caused by the medium, and the limited performance of current metal materials, the bonding force between two materials alone is insufficient to withstand high temperatures, erosion, and wear, and they are prone to detachment. Large centrifugal pumps present challenges due to the large size of their components, stress deformation, and high centrifugal force of the impeller. This invention enhances the connection strength between the carbon fiber layer and the metal layer by incorporating through holes or snap-fit ​​mechanisms, enabling the impeller to be used in large centrifugal pumps exceeding 500KW. The structural components of this invention exhibit stable metal structures, preventing cracking of the carbon fiber layer, and even if the carbon fiber layer cracks, it will not detach.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1 As shown, this embodiment provides a large carbon fiber composite centrifugal pump, including an impeller 3, which includes an impeller body 31; the impeller body 31 is provided with a plurality of through holes 34; and an impeller carbon fiber layer 33 is provided on the impeller body 31. The through holes 34 can enhance the bonding strength between the impeller carbon fiber layer 33 and the impeller body 31, preventing the impeller carbon fiber layer 33 from falling off.

[0032] In this specific embodiment, a plurality of clips 32 are fixedly provided on the impeller body 31; the impeller body 31 is made of stainless steel, and the clips 32 are also made of stainless steel, and the clips 32 are welded and fixed to the impeller body 31. In this specific embodiment, the clips 32 have a U-shaped structure, and the open end of the clips 32 is welded to the impeller body 31.

[0033] Impeller 3 is a closed impeller to improve the operating efficiency of the centrifugal pump.

[0034] The centrifugal pump in this specific embodiment further includes a front guard plate 2 and a rear guard plate 1, which are respectively positioned in front of and behind the impeller 3. Both the front guard plate 2 and the rear guard plate 1 include a metal layer 21 and a carbon fiber layer 22, with the carbon fiber layer 22 located on the side facing the impeller 3. The surface of the metal layer 21 is provided with snap fasteners 32 to enhance the connection strength between the metal layer 21 and the carbon fiber layer 22.

[0035] The centrifugal pump in this specific embodiment also includes a sheath 4, which includes a metal layer 41, a transition layer 42 and a sheath carbon fiber layer 43 arranged sequentially from the outside to the inside. The transition layer is used to absorb thermal expansion differences.

[0036] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] This specification uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A large carbon fiber composite centrifugal pump, characterized in that, The impeller includes an impeller body; the impeller body has multiple through holes, and / or multiple clips are fixedly provided on the impeller body; the impeller body has a non-metallic layer.

2. The large carbon fiber composite centrifugal pump according to claim 1, characterized in that, The impeller body is made of metal.

3. The large carbon fiber composite centrifugal pump according to claim 1, characterized in that, The clips are welded and fixed to the impeller body.

4. The large carbon fiber composite centrifugal pump according to claim 1, characterized in that, The impeller is a closed impeller.

5. The large carbon fiber composite centrifugal pump according to claim 1, characterized in that, It also includes a front guard plate and a rear guard plate, which are respectively positioned in front of and behind the impeller.

6. The large carbon fiber composite centrifugal pump according to claim 5, characterized in that, Both the front guard plate and the rear guard plate include a guard plate metal layer and a guard plate carbon fiber layer, and the guard plate carbon fiber layer is located on the side facing the impeller.

7. The large carbon fiber composite centrifugal pump according to claim 6, characterized in that, The surface of the metal layer of the protective plate is provided with buckles.

8. The large carbon fiber composite centrifugal pump according to claim 1, characterized in that, It also includes a sheath, which comprises a metal layer, a transition layer and a sheath carbon fiber layer arranged sequentially from the outside to the inside.

9. The large carbon fiber composite centrifugal pump according to claim 1, characterized in that, The non-metallic layer of the impeller is a carbon fiber layer.

10. The large carbon fiber composite centrifugal pump according to claim 1, characterized in that, The impeller body is made of stainless steel.

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