High-stability multi-stage sectional water pump

Abstract

A high-stability balance disc is arranged at the rear end of a pump shaft, a balance ring corresponding to the balance disc is further arranged at the rear end of a pump body, the balance disc is composed of a wear-resistant ring, a disc body and a spacer sleeve, the disc body and the spacer sleeve are integrally formed, an annular fixing step is arranged on the periphery of the disc body, and the wear-resistant ring is buckled and fixed on the fixing step. A plurality of arc-shaped protrusions are arranged at the end, facing the pump body, of the abrasion-resistant ring in an array mode, a replaceable abrasion-resistant lining ring is fixed to the balance ring and corresponds to the abrasion-resistant ring, the outer diameter of the disc body is smaller than that of the balance ring, and the balance ring can be directly detached from the pump body after the abrasion-resistant ring is detached. Therefore, the device is more convenient to disassemble, assemble and replace and better in stability.

Description

Technical Field

[0001] This utility model relates to a highly stable multi-stage segmental water pump. Background Technology

[0002] Patent CN222363135U discloses a multi-stage segmental water pump with a split-type balance disc at the rear end of the pump shaft. The split-type balance disc includes: a disc body; a balance bushing located on the outer periphery of the disc body, with multiple threaded holes on both the disc body and the balance bushing for securing them together with bolts; and a balance retainer positioned between the pump shaft and the balance retainer, extending axially. The disc body, balance bushing, and balance retainer are detachable separate structures. This split-type design makes replacing the balance disc easier, requiring only a portion to be replaced, significantly reducing costs.

[0003] In practical applications, the detachable structure of this split-type balance disc, including the disc body, balance ring, and balance retainer, leads to a decrease in the overall structural reliability of the balance disc, making it prone to shaking and reducing the stability of the water pump during operation. In addition, when the balance disc wears, the balance ring will also wear simultaneously. When replacing the balance ring in the above-mentioned structure, the entire disc body must be disassembled first before the balance ring can be removed, which is inconvenient. Moreover, such frequent disassembly and assembly will also affect the coaxiality of the balance disc and the pump shaft. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a highly stable multi-stage segmental water pump, which improves the structure of the balance disc and balance ring, making them easier to disassemble and replace, and with better stability.

[0005] The technical solution of this utility model is: a high-stability multi-stage segmental water pump, wherein a high-stability balance disc is set at the rear end of the pump shaft, and a balance ring corresponding to the balance disc is also set at the rear end of the pump body. The balance disc is composed of a wear-resistant ring, an integrally formed disc body and a retainer. An annular fixed step is provided on the outer periphery of the disc body. The wear-resistant ring is fastened and fixed on the fixed step. Multiple arc-shaped protrusions are arrayed on the end of the wear-resistant ring facing the pump body.

[0006] A replaceable wear-resistant liner is fixed on the balance ring, and the wear-resistant liner is set corresponding to the wear-resistant ring;

[0007] The outer diameter of the disc is smaller than the outer diameter of the balance ring, so the balance ring can be directly removed from the pump body after the wear-resistant ring is disassembled.

[0008] Furthermore, the balance ring is fixed to the pump body by screws, the wear-resistant bushing has multiple connecting posts with internal threads, the balance ring has through holes corresponding to each connecting post, the wear-resistant bushing is fastened on the balance ring, each connecting post passes through the corresponding through hole, and the end of each connecting post is also fixed with a bolt.

[0009] Furthermore, each through hole on the balance ring also has a countersunk hole corresponding to a bolt at its end.

[0010] Furthermore, the wear-resistant ring has a convex ring on the side facing the balance ring, and each of the arc-shaped protrusions is arrayed on the convex ring.

[0011] Furthermore, the convex ring is fixed to the wear-resistant ring by screws.

[0012] Furthermore, the wear-resistant ring is fixed to the fixed step of the disc body by multiple screws, and the inner circumference of the wear-resistant ring has a concave ring corresponding to the fixed step.

[0013] Specifically, both the convex ring and the wear-resistant liner ring are integrally molded structures of wear-resistant ceramic.

[0014] Furthermore, the retaining sleeve is disposed between the pump shaft and the balance sleeve.

[0015] The beneficial effects of this utility model are: In this utility model, the main body of the balance disc is composed of an integrally formed disc body and a retaining sleeve. After being connected to the pump shaft, it is stable and reliable, not easy to loosen, and the coaxiality is guaranteed, thereby effectively balancing the axial thrust of the multi-stage impeller and ensuring the stability of the pump body.

[0016] Among them, the wear-resistant ring and the wear-resistant bushing are the main components that come into contact and friction. They are made of wear-resistant materials. When the wear-resistant ring is close to the wear-resistant bushing, the arc-shaped protrusions on the wear-resistant ring rub against the wear-resistant bushing, which can reduce the friction area and thus effectively improve the service life of the balance disc and the balance ring.

[0017] Both the wear ring and the wear liner are detachable. When the wear ring and the wear liner are worn to a certain extent, the wear ring is first removed from the disc. Since the outer diameter of the disc is smaller than the outer diameter of the balance ring, the balance ring can be directly removed from the pump body. Then, the wear ring and the wear liner on the balance ring are replaced. After replacement, the above operations are reversed to complete the installation and fixing of the wear ring and the balance ring. The whole replacement process is simpler and more convenient, and only the main worn parts are replaced, which can save certain resources. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 yes Figure 1Enlarged view of section A;

[0020] Figure 3 This is a schematic diagram of the wear-resistant ring in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the back of the balance ring in this utility model.

[0022] In the diagram: 1. Pump shaft; 2. Balance ring; 3. Wear-resistant ring; 4. Disc; 5. Sleeve; 6. Arc-shaped protrusion; 7. Wear-resistant liner; 8. Connecting column; 9. Bolt; 10. Convex ring; 11. Balance sleeve. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0024] Combination Figure 1-4 As shown, a highly stable multi-stage segmental water pump is provided with a highly stable balance disc at the rear end of the pump shaft 1, and a balance ring 2 corresponding to the balance disc is also provided at the rear end of the pump body.

[0025] The balance disc is composed of a wear-resistant ring 3, an integrally formed disc body 4, and a retaining sleeve 5. The outer periphery of the disc body 4 is provided with an annular fixed step. The wear-resistant ring 3 is fastened and fixed on the fixed step. The end of the wear-resistant ring 3 facing the pump body has multiple arc-shaped protrusions 6.

[0026] A replaceable wear-resistant liner 7 is fixed on the balance ring 2, and the wear-resistant liner 7 is set corresponding to the wear-resistant ring 3;

[0027] The outer diameter of the disc 4 is smaller than the outer diameter of the balance ring 2. After disassembling the wear-resistant ring 3, the balance ring 2 can be directly removed from the pump body.

[0028] In the above structure, the main body of the balance disc is composed of an integrally formed disc body 4 and a retaining sleeve 5. After being connected to the pump shaft 1, it is stable and reliable, not easy to loosen, and the coaxiality is guaranteed, thereby effectively balancing the axial thrust of the multi-stage impeller and ensuring the stability of the pump body operation.

[0029] Among them, the wear-resistant ring 3 and the wear-resistant liner 7 are the main components that come into contact and friction. They are made of wear-resistant materials. When the wear-resistant ring 3 is close to the wear-resistant liner 7, the arc-shaped protrusions 6 on the wear-resistant ring 3 rub against the wear-resistant liner 7, which can reduce the friction area and thus effectively improve the service life of the balance disc and the balance ring 2.

[0030] Both the wear-resistant ring 3 and the wear-resistant liner 7 are detachable structures. When the wear-resistant ring 3 and the wear-resistant liner 7 are worn to a certain extent, the wear-resistant ring 3 is first removed from the disc body 4. Since the outer diameter of the disc body 4 is smaller than the outer diameter of the balance ring 2, the balance ring 2 can be directly removed from the pump body. Then, the wear-resistant ring 3 and the wear-resistant liner 7 on the balance ring 2 are replaced. After the replacement is completed, the above operation is reversed to complete the installation and fixation of the wear-resistant ring 3 and the balance ring 2. The whole replacement process is simpler and more convenient, and only the main worn parts are replaced, which can save certain resources.

[0031] In another embodiment, combined Figure 1 , Figure 2 and Figure 4 As shown, the balance ring 2 is fixed to the pump body by screws. The wear-resistant liner 7 has multiple connecting posts 8 with internal threads. The balance ring 2 has through holes corresponding to each connecting post 8. The wear-resistant liner 7 is fastened to the balance ring 2. Each connecting post 8 passes through the corresponding through hole. The end of each connecting post 8 is also fixed with a bolt 9 to ensure the reliability of the connection between the wear-resistant liner 7 and the balance ring 2.

[0032] In another embodiment, such as Figure 2 As shown, each through hole end on the balance ring 2 also has a countersunk hole corresponding to the bolt 9, so that the back of the balance ring 2 remains flat after the bolt 9 is fixed, so as to avoid affecting the fixing of the balance ring 2.

[0033] In another embodiment, such as Figure 2 As shown, the wear-resistant ring 3 has a convex ring 10 on the side facing the balance ring 2, and each of the arc-shaped protrusions 6 is arrayed on the convex ring 10 to ensure that the disc body 4 will not rub against the balance ring 2.

[0034] In another embodiment, combined Figure 2 and Figure 3 As shown, the convex ring 10 is fixed to the wear-resistant ring 3 by screws. Since the worn part is only the arc-shaped protrusion 6 on the convex ring 10, when the arc-shaped protrusion 6 is severely worn, only the convex ring 10 needs to be replaced, which can further reduce the waste of resources.

[0035] In another embodiment, combined Figure 1-3 As shown, the wear-resistant ring 3 is fixed to the fixed step of the disc body 4 by multiple screws. The inner circumference of the wear-resistant ring 3 has a concave ring corresponding to the fixed step to ensure the reliability of the connection of the wear-resistant ring 3.

[0036] In another embodiment, both the convex ring 10 and the wear-resistant bushing 7 are integrally molded wear-resistant ceramic structures.

[0037] In another embodiment, such as Figure 1 As shown, the retaining sleeve 5 is disposed between the pump shaft 1 and the balance sleeve 11.

Claims

1. A high-stability multi-stage sectional water pump, a high-stability balance disc is arranged at the rear end of a pump shaft (1), and a balance ring (2) corresponding to the balance disc is arranged at the rear end of the pump body, characterized in that, The balance disc is composed of a wear-resistant ring (3) and an integrally formed disc body (4) and a retaining sleeve (5), the disc body (4) is provided with an annular fixing step at the outer periphery, the wear-resistant ring (3) is buckled and fixed on the fixing step, and a plurality of arc-shaped protrusions (6) are arranged on the end of the wear-resistant ring (3) towards the pump body. The balance ring (2) is fixed with a replaceable wear-resistant lining ring (7) corresponding to the wear-resistant ring (3). The outer diameter of the disc body (4) is smaller than that of the balance ring (2), and the balance ring (2) can be directly detached from the pump body after the wear-resistant ring (3) is detached.

2. A high-stable multi-stage sectional water pump according to claim 1, characterized in that, The balance ring (2) is fixed on the pump body by screws, the wear-resistant lining ring (7) is provided with a plurality of connecting columns (8) with internal threads, the balance ring (2) is provided with through holes corresponding to each connecting column (8), the wear-resistant lining ring (7) is buckled on the balance ring (2), each connecting column (8) passes through the corresponding through hole, and the end of each connecting column (8) is further fixed with a bolt (9).

3. A high-stable multi-stage section type water pump according to claim 2, wherein The end of each through hole on the balance ring (2) is further provided with a counterbore corresponding to the bolt (9).

4. A high-stable multi-stage segment type water pump according to claim 3, wherein The wear-resistant ring (3) is provided with a convex ring (10) on the side towards the balance ring (2), and each arc-shaped protrusion (6) is arranged on the convex ring (10).

5. A high-stable multi-stage segment type water pump according to claim 4, wherein The convex ring (10) is fixed on the wear-resistant ring (3) by screws.

6. A high-stable multi-stage segment type water pump according to claim 5, wherein The wear-resistant ring (3) is fixed on the fixing step of the disc body (4) by a plurality of screws, and the inner periphery of the wear-resistant ring (3) is provided with a concave ring corresponding to the fixing step.

7. A high-stable multi-stage segment type water pump according to claim 6, wherein The convex ring (10) and the wear-resistant lining ring (7) are integrally formed of wear-resistant ceramic.

8. A high-stable multi-stage segment type water pump according to claim 7, characterized in that, The retaining sleeve (5) is arranged between the pump shaft (1) and the balance sleeve (11).

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