Integral dynamic balance cradle system of horizontal middle-open type multistage pump rotor

Abstract

The utility model discloses an integral dynamic balance cradle system of a horizontal split multistage pump rotor, and relates to the technical field of dynamic balance, a plurality of impellers and a plurality of sealing rings are arranged on the multistage pump rotor at intervals, the sealing rings are arranged at the rear ends of the impellers, the dynamic balance cradle system comprises a support, a fixing plate, a screw rod, a limiting locking piece and a clamping ring, the fixing plate is fixed on the support, and the screw rod is fixed on the support. A hole channel is formed in the fixing plate, one end of the screw rod penetrates through the hole channel, the other end of the screw rod is in threaded connection with the clamping ring, the limiting locking piece is in threaded connection with the screw rod, one end of the screw rod and the fixing plate are locked and fixed, and the clamping ring is connected to the sealing ring in a sleeving mode and clamps the sealing ring. The multi-stage pump rotor assembly structure can solve the problem that a multi-stage pump rotor cannot be assembled at a time and can directly complete dynamic balance, improves and guarantees the dynamic balance precision of the whole multi-stage pump rotor part, simplifies the workload of installation and maintenance, reduces the risk of part damage caused by repeated disassembly and assembly, and is high in applicability, simple and compact in structure and easy to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of dynamic balancing, in particular to an integral dynamic balancing cradle system for a horizontal split multi-stage pump rotor. Background Art

[0002] The rotor assembly of a multi-stage pump generally includes a multi-stage pump rotor body, a plurality of impellers, and a plurality of sealing rings. The plurality of impellers and the plurality of sealing rings are respectively arranged on the multi-stage pump rotor body at intervals. Since the gap between the sealing ring and the impeller in such a rotor assembly is very small, it is impossible to perform dynamic balancing with the sealing ring; therefore, the multi-stage pump rotor needs to perform dynamic balancing in a state without the sealing ring, and the sealing ring needs to be disassembled and reinstalled after the dynamic balancing is completed. Using such a design method will bring many problems:

[0003] 1. After the multi-stage pump rotor is disassembled and reinstalled, the geometric tolerances of the part installation will change to some extent, so the dynamic balancing accuracy of the reinstalled rotor will also be damaged to a certain extent.

[0004] 2. Since the rotor cannot be dynamically balanced and inspected in the final installation state, the actual dynamic balancing accuracy of the rotor cannot be detected, resulting in an increased use risk.

[0005] 3. After the rotor is dynamically balanced, it needs to be disassembled and reinstalled again, which will increase a lot of workload, and it is very easy to cause scratches and nicks on the shaft, increasing the risk of damage, as well as the workload and maintenance period.

[0006] Therefore, it is necessary to design an integral dynamic balancing cradle system for a horizontal split multi-stage pump rotor to solve the problem that the multi-stage pump rotor cannot be assembled and dynamically balanced directly at one time. Summary of the Utility Model

[0007] In view of the above-mentioned deficiencies existing currently, the utility model provides an integral dynamic balancing cradle system for a horizontal split multi-stage pump rotor, which can solve the problem that the multi-stage pump rotor cannot be assembled and dynamically balanced directly at one time, improve and ensure the dynamic balancing accuracy of the entire multi-stage pump rotor component, simplify the workload of installation and maintenance, reduce the risk of part damage caused by repeated disassembly and reinstallation, has a wide range of uses, strong applicability, a simple and compact structure, is easy to disassemble and install, and is convenient to use.

[0008] To achieve the above object, the embodiments of the utility model adopt the following technical solutions:

[0009] An overall dynamic balance cradle system for a horizontally split multi-stage pump rotor. A number of impellers and a number of sealing rings are provided at intervals on the multi-stage pump rotor. The sealing rings are arranged at the rear ends of the impellers. The dynamic balance cradle system includes a bracket, a fixing plate, a screw, a limit locking member, and a clamping ring. The fixing plate is fixed on the bracket. The fixing plate is provided with a hole. One end of the screw passes through the hole and the other end is threadedly connected to the clamping ring. The screw is locked and fixed to the fixing plate by the limit locking member. The clamping ring is sleeved on the sealing ring and clamps the sealing ring.

[0010] According to one aspect of the present invention, the clamping ring is provided with a threaded hole. One end of the screw passes through the hole and the other end is threadedly connected to the threaded hole.

[0011] According to one aspect of the present invention, the clamping ring includes an upper clamping ring and a lower clamping ring, which are fixed by bolts. The sealing ring is clamped and wrapped between the upper clamping ring and the lower clamping ring. The threaded hole is provided on the upper clamping ring.

[0012] According to one aspect of the present invention, the hole is a strip-shaped hole, and the screw can axially slide along the strip-shaped hole.

[0013] According to one aspect of the present invention, the bracket is a rigid fixed column or a telescopic rod.

[0014] According to one aspect of the present invention, the fixing plate is in the shape of a flat plate or an L-shaped plate. Both ends of the fixing plate are fixed to the bracket by bolts respectively.

[0015] Advantages of the implementation of the present invention: The sealing ring is suspended on the fixing plate by the screw, the limit locking member, and the clamping ring, so that the sealing ring does not interfere with the dynamic balance of the multi-stage pump rotor and the impeller, solving the problem that the multi-stage pump rotor cannot be assembled at one time and directly complete the dynamic balance, enabling the entire rotor assembly to be assembled at one time and directly complete the dynamic balance, thereby improving and ensuring the dynamic balance accuracy of the entire multi-stage pump rotor component, simplifying the workload of installation and maintenance, and reducing the risk of part damage caused by repeated disassembly and assembly. By setting the screw to be able to extend out of the hole and using clamping rings of different diameters, etc., the system can adapt to sealing rings of different heights and different diameters, with a wide range of uses and strong applicability. By setting the hole as a strip-shaped hole and the screw can axially slide along the strip-shaped hole, the system can adapt to sealing rings at different horizontal positions, with a wide range of uses and strong applicability. At the same time, the overall structure of the system is simple and compact, easy to disassemble and assemble, and convenient to use. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the attached drawings required for use in the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the fixing plate of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the clamping ring of the present utility model.

[0020] The names corresponding to the serial numbers in the figure are as follows:

[0021] 1. Multistage pump rotor; 2. Impeller; 3. Sealing ring; 4. Bracket; 5. Fixing plate; 51. Conduit; 6. Screw; 7. Limit locking piece; 8. Clamping ring; 81. Upper clamping ring; 82. Lower clamping ring; 83. Threaded hole. Specific embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than 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 efforts belong to the scope of protection of the present utility model.

[0023] As Figure 1 - Figure 3 shown, a horizontal split multistage pump rotor integral dynamic balance cradle system, several impellers 2 and several sealing rings 3 are arranged at intervals on the multistage pump rotor 1, and the sealing rings 3 are arranged at the rear end of the impellers 2; the dynamic balance cradle system includes a bracket 4, a fixing plate 5, a screw 6, a limit locking piece 7, and a clamping ring 8. The fixing plate 5 is fixed on the bracket 4. The fixing plate 5 is in the shape of a flat plate or an L-shaped plate, and both ends of the fixing plate 5 are fixed to the bracket 4 through bolt-like fasteners respectively; a conduit 51 is arranged on the fixing plate 5; the top end of the screw 6 passes through the conduit 51 and the bottom end is threadedly connected to the clamping ring 8. The limit locking piece 7 can adopt fasteners such as nuts and gaskets. By threadedly connecting the limit locking piece 7 to the top end of the screw 6, the top end of the screw 6 is locked and fixed to the fixing plate 5. The clamping ring 8 is sleeved on the sealing ring 3 and clamps the sealing ring 3. In this way, the sealing ring 3 can be suspended relative to the fixing plate 5.

[0024] In practical applications, the clamping ring 8 includes an upper clamping ring 81 and a lower clamping ring 82. After the two are butted up and down, both ends are fixed by bolt-like fasteners; the sealing ring 3 is clamped and wrapped between the upper clamping ring 81 and the lower clamping ring 82. A threaded hole 83 is provided at the middle position above the upper clamping ring 81. The top end of the screw rod 6 passes through the hole 51, and the bottom end is threadedly connected to the threaded hole 83 of the upper clamping ring 81. The shape of the combined upper clamping ring 81 and lower clamping ring 82, that is, the overall shape of the clamping ring 8, is similar to a pipe clamp. The structural shapes of the upper clamping ring 81 and the lower clamping ring 82 are adapted to the structural shape of the sealing ring 3.

[0025] In practical applications, the hole 51 is a strip-shaped hole, and the screw rod 6 can slide axially along the strip-shaped hole; in this way, it is convenient to adjust the horizontal position of the screw rod 6 according to the different horizontal positions of the sealing ring 3, enhancing the applicability, expanding the scope of use, and making the use more convenient. At the same time, during the use of this system, by setting that the screw rod 6 can extend out of the hole 51 and using clamping rings 8 with different diameters, etc., this system can also adapt to sealing rings 3 with different heights and different diameters, with a wide range of use and strong applicability.

[0026] In practical applications, the bracket 4 can be a rigid fixing column for the support and installation of components such as the fixing plate 5; or, the bracket 4 can also be designed as a telescopic rod, so that it is convenient to automatically adjust the height positions of the fixing plate 5, the screw rod 6, etc., with more convenient use and strong applicability.

[0027] The advantages of the implementation of the present utility model: The sealing ring 3 is suspended on the fixing plate 5 through the screw rod 6, the limit locking member 7, and the clamping ring 8, so that the sealing ring 3 does not interfere with the dynamic balance of the multi-stage pump rotor 1 and the impeller 2, solving the problem that the multi-stage pump rotor 1 cannot be assembled once and directly complete the dynamic balance, enabling the entire rotor assembly to be assembled once and directly complete the dynamic balance, thereby improving and ensuring the dynamic balance accuracy of the entire multi-stage pump rotor 1 component, simplifying the workload of installation and maintenance, and reducing the risk of part damage caused by repeated disassembly and assembly. By setting that the screw rod 6 can extend out of the hole 51 and using clamping rings 8 with different diameters, etc., this system can adapt to sealing rings 3 with different heights and different diameters, with a wide range of use and strong applicability. By setting the hole 51 as a strip-shaped hole and the screw rod 6 can slide axially along the strip-shaped hole, this system can adapt to sealing rings 3 with different horizontal positions, with a wide range of use and strong applicability. At the same time, the overall structure of this system is simple and compact, easy to disassemble and assemble, and convenient to use.

[0028] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. An integral dynamic balance cradle system for a horizontally split multi-stage pump rotor. A plurality of impellers (2) and a plurality of sealing rings (3) are arranged at intervals on the multi-stage pump rotor (1). The sealing rings (3) are arranged at the rear ends of the impellers (2). It is characterized in that, The dynamic balance cradle system includes a bracket (4), a fixing plate (5), a screw (6), a limit locking member (7), and a clamping ring (8). The fixing plate (5) is fixed on the bracket (4). A hole passage (51) is provided on the fixing plate (5). One end of the screw (6) passes through the hole passage (51), and the other end is threadedly connected to the clamping ring (8). The screw (6) is locked and fixed to the fixing plate (5) by threadedly connecting the limit locking member (7) to the screw (6). The clamping ring (8) is sleeved on the sealing ring (3) and clamps the sealing ring (3).

2. The overall dynamic balance cradle system of the horizontal split multi-stage pump rotor according to claim 1, wherein A threaded hole (83) is provided on the clamping ring (8). One end of the screw (6) passes through the hole passage (51), and the other end is threadedly connected to the threaded hole (83).

3. The overall dynamic balance cradle system for the rotor of the horizontally split multi-stage pump according to claim 2, characterized in that, The clamping ring (8) includes an upper clamping ring (81) and a lower clamping ring (82), which are fixed by bolts. The sealing ring (3) is clamped and wrapped between the upper clamping ring (81) and the lower clamping ring (82). The threaded hole (83) is provided on the upper clamping ring (81).

4. The integral dynamic balance cradle system for the rotor of the horizontally split multi-stage pump according to claim 1, characterized in that, The hole passage (51) is a strip-shaped hole, and the screw (6) can axially slide along the strip-shaped hole.

5. The overall dynamic balance cradle system of the horizontal split multi-stage pump rotor according to claim 1, characterized in that, The bracket (4) is a rigid fixed column or a telescopic rod.

6. The integral dynamic balance cradle system of the horizontal split multi-stage pump rotor according to claim 5, characterized in that, The fixing plate (5) is in the shape of a flat plate or an L-shaped plate, and both ends of the fixing plate (5) are fixed to the bracket (4) by bolts respectively.

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