A large centrifugal fan impeller dismounting tool

Abstract

This utility model belongs to the field of disassembly tool technology, and relates to a disassembly tool for a large centrifugal fan impeller, including a jack, tool a, tool b, and a jack support plate; tool a includes a telescopic rod, a shaft disc connecting part, and a support plate connecting part; the telescopic rod is provided with a locking structure; the shaft disc connecting part is fixedly connected to one end of the telescopic rod for fixing the telescopic rod to the shaft disc of the centrifugal fan; the support plate connecting part is fixedly connected to the other end of the telescopic rod; tool b has the same structure as tool a; the support plate connecting parts of tool a and tool b are used to fix the jack support plate; the jack support plate is used to support the jack. This utility model's disassembly tool uses the threaded holes used for connecting and fixing the fan blades and shaft disc as fixing points, solving the problem of disassembling the impeller of a large centrifugal fan without pre-reserved maintenance holes.

Description

Technical Field

[0001] This utility model belongs to the field of disassembly tool technology, and relates to a disassembly tool for a large centrifugal fan impeller. Background Technology

[0002] In the industrial production of polyester filament, the quality of cooling air directly affects product quality. As the core equipment for providing cooling air, centrifugal fans are prone to rusting after long-term operation due to the humidity of the production environment being higher than 95% all year round. This leads to wear on the fan main shaft bearing seat, and disassembly is difficult when the main shaft needs to be replaced.

[0003] For centrifugal fans with built-in access ports, the main shaft and impeller can be separated using specialized disassembly equipment. However, for centrifugal fans without pre-designed access ports, there are currently two main disassembly methods: First, manually using a 10kg copper rod or a 5kg hammer to strike one end of the main shaft to detach it from the impeller. This method is not only labor-intensive and resource-intensive, but also inefficient and prolongs fan downtime, impacting production efficiency in the chemical fiber industry. Furthermore, the confined space inside the air conditioning unit makes operation extremely inconvenient. Second, hot work can be used to cut and disassemble the main shaft before removal. However, hot work inside air conditioning units is considered a high-risk operation. Due to the numerous air conditioning filter bags and high oil content within the unit, hot work poses a significant fire risk, potentially causing substantial losses to the company. Additionally, hot work can damage the main shaft, increasing maintenance costs and wasting resources.

[0004] Therefore, developing a tool suitable for disassembling the main shaft and impeller of centrifugal fans without pre-reserved maintenance holes is of great significance for ensuring polyester filament production and reducing enterprise operating costs. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art and provide a tool for disassembling large centrifugal fan impellers.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A large centrifugal fan impeller disassembly tool is provided. The centrifugal fan includes an impeller and a main shaft. The impeller is composed of blades and a shaft disc. The blades are fixed to the shaft disc by bolts a. The shaft disc is sleeved on the main shaft. The disassembly tool includes a jack, tool a, tool b, and a jack support plate.

[0008] Tooling a includes a telescopic rod, a shaft disc connecting part, and a support plate connecting part;

[0009] The telescopic rod is equipped with a locking mechanism;

[0010] The shaft disc connecting part is fixedly connected to one end of the telescopic rod, and the shaft disc connecting part is used to cooperate with bolt a to fix the telescopic rod to the shaft disc; the support plate connecting part is fixedly connected to the other end of the telescopic rod.

[0011] Tooling b has the same structure as tooling a;

[0012] The support plate connecting parts of tool a and tool b are used to fix the jack's load-bearing support plate.

[0013] The jack support plate is used to support the jack.

[0014] As a preferred technical solution:

[0015] The above-described large centrifugal fan impeller disassembly tool includes an extension rod comprising an outer tube, an inner tube, and bolt b.

[0016] The outer tube is a hollow tube, and the inner tube is located inside the outer tube;

[0017] Both the outer tube and the inner tube are provided with several threaded through holes b, which are evenly distributed along the axis of the telescopic rod.

[0018] Bolt b passes through threaded through holes b on both the outer and inner tubes. The threaded through holes b and bolt b work together to form a locking mechanism.

[0019] As described above, in a large centrifugal fan impeller disassembly tool, the number of threaded through holes b on the inner tube is greater than the number of threaded through holes b on the outer tube.

[0020] The large centrifugal fan impeller disassembly tool described above has an outer tube made of stainless steel hollow tube with an outer diameter of 70mm and a wall thickness of 5mm, and an inner tube made of stainless steel hollow tube with an outer diameter of 60mm and a wall thickness of 5mm.

[0021] As described above, the impeller disassembly tool for a large centrifugal fan has a rectangular plate as the shaft disc connection part;

[0022] The plate surface of the shaft disc connection is perpendicularly connected to the telescopic rod.

[0023] As described above, a large centrifugal fan impeller disassembly tool has several threaded through holes a on the shaft disk connection part, which correspond to the threaded holes on the shaft disk, and bolts a are set in the threaded through holes a.

[0024] As described above, a large centrifugal fan impeller disassembly tool has a support plate connecting part that is rectangular, and the plate surface of the support plate connecting part is parallel to the central axis of the inner tube.

[0025] A through hole is provided in the middle of the plate surface of the support plate connection part for the jack support plate to pass through.

[0026] Beneficial effects:

[0027] The disassembly tool of this utility model uses the threaded hole for connecting and fixing the fan blades and shaft disc as a fixing point, which solves the problem of disassembling the impeller of a large centrifugal fan that does not have a reserved maintenance hole.

[0028] The disassembly tool of this utility model adopts a movable assembly design, which has a larger size adjustment space and is more flexible and convenient in use.

[0029] The disassembly tool of this invention does not use a threaded rod structure, which effectively avoids the risk of deformation and damage to the threaded rod due to excessive force, and increases the durability of the tool. Attached Figure Description

[0030] Figure 1 This is an installation diagram of a large centrifugal fan impeller disassembly tool according to the present invention;

[0031] Figure 2 This is a schematic diagram showing the connection relationship between the shaft disc connecting part and the outer tube of this utility model;

[0032] Figure 3 This is a schematic diagram showing the connection relationship between the support plate connecting part and the inner tube of this utility model;

[0033] Figure 4 An exploded view of a large spindle disassembly tool;

[0034] Among them, 1-jack bearing support plate, 4-jack, 5-main shaft, 6-bolt b, 7-bolt a, 8-shaft disc, 10-shaft disc connecting part, 11-support plate connecting part, 12-outer tube, 13-inner tube. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0036] A tool for disassembling a large centrifugal fan impeller. The centrifugal fan includes an impeller and a main shaft 5. The impeller consists of blades and a shaft disc 8. The blades are fixed to the shaft disc 8 by bolts a 7. The shaft disc 8 is fitted onto the main shaft 5. Figures 1-4 As shown, the disassembly tools include tool a, tool b, jack 4, and jack support plate 1;

[0037] like Figure 1 or Figure 4 As shown, tooling a and tooling b have the same structure;

[0038] Tooling a includes a telescopic rod, a shaft disc connecting part 10, and a support plate connecting part 11;

[0039] The telescopic rod includes an outer tube 12, an inner tube 13, and bolt b 6;

[0040] The outer tube 12 is a stainless steel hollow tube with an outer diameter of 70 mm and a wall thickness of 5 mm, and the inner tube 13 is a stainless steel hollow tube with an outer diameter of 60 mm and a wall thickness of 5 mm. The inner tube 13 is located inside the outer tube 12.

[0041] Both the outer tube 12 and the inner tube 13 are provided with a number of threaded through holes b, which are evenly distributed along the axis of the telescopic rod; the number of threaded through holes b on the inner tube 13 is greater than the number of threaded through holes b on the outer tube 12.

[0042] Bolt b 6 passes through threaded through holes b on both the outer tube 12 and the inner tube 13. The threaded through holes b and bolt b 6 work together to form a locking mechanism.

[0043] like Figure 2 As shown, the shaft plate connecting part 10 is a rectangular plate. The surface of the rectangular plate is perpendicular to and fixedly connected to the end of the outer tube 12 away from the inner tube 13. Several threaded through holes a are opened on the rectangular plate, which correspond to the threaded holes on the shaft plate 8. Bolts a 7 are set in the threaded through holes a. The rectangular plate is used to cooperate with bolts a 7 to fix the telescopic rod to the shaft plate 8.

[0044] like Figure 3 As shown, the support plate connecting part 11 is fixedly connected to the end of the inner tube 13 away from the outer tube 12; the support plate connecting part 11 is a rectangular plate, the surface of the rectangular plate is parallel to the central axis of the inner tube 13, and a through hole is opened in the middle of the surface of the rectangular plate for the jack force support plate 1 to pass through.

[0045] like Figure 1 As shown, the jack support plate 1 is used to support the jack 4.

[0046] When using this tool to disassemble the impeller of a centrifugal fan without a pre-drilled inspection hole, the specific operating steps are as follows: First, use a wrench to unscrew bolt a7 to separate the blades from the shaft disc 8; then, as... Figure 1 As shown, tooling a and tooling b are symmetrically fixed to both sides of the centrifugal fan shaft disk 8 by tightening bolts a 7 through their respective shaft disk connecting parts 10. Then, the length of the telescopic rod is adjusted and locked using the locking mechanism of the telescopic rod to match the length of the main shaft 5. After that, the jack support plate 1 is passed through the through hole on the support plate connecting part 11 of tooling a and tooling b to support the jack 4. At the same time, the jack 4 is aligned with the main shaft 5 and ready to apply force. Finally, the jack 4 is operated to lift the main shaft 5 out of the shaft disk 8, thus completing the entire disassembly process.

Claims

1. A disassembly tool for a large centrifugal fan impeller, the centrifugal fan comprising an impeller and a main shaft (5), the impeller consisting of blades and a shaft disc (8), the blades being fixed to the shaft disc (8) by bolts a (7), the shaft disc (8) being fitted onto the main shaft (5), the disassembly tool comprising a jack (4), characterized in that, The disassembly tools also include tool a, tool b and jack support plate (1); Tooling a includes a telescopic rod, a shaft disc connecting part (10), and a support plate connecting part (11); The telescopic rod is equipped with a locking structure; The shaft disc connecting part (10) is fixedly connected to one end of the telescopic rod, and the shaft disc connecting part (10) is used to cooperate with bolt a (7) to fix the telescopic rod to the shaft disc (8); the support plate connecting part (11) is fixedly connected to the other end of the telescopic rod. Tooling b has the same structure as tooling a; The support plate connecting part (11) of tool a and the support plate connecting part (11) of tool b are used to fix the jack force support plate (1); The jack support plate (1) is used to support the jack (4).

2. The tool for disassembling a large centrifugal fan impeller according to claim 1, characterized in that, The telescopic rod includes an outer tube (12), an inner tube (13), and bolt b (6); The outer tube (12) is a hollow tube, and the inner tube (13) is located inside the outer tube (12); Both the outer tube (12) and the inner tube (13) are provided with several threaded through holes b, which are distributed at equal intervals along the axis of the telescopic rod. Bolt b (6) passes through threaded through holes b on both the outer tube (12) and the inner tube (13). The threaded through holes b and bolt b (6) work together to form a locking mechanism.

3. The tool for disassembling a large centrifugal fan impeller according to claim 2, characterized in that, The number of threaded through holes b on the inner tube (13) is greater than the number of threaded through holes b on the outer tube (12).

4. A tool for disassembling a large centrifugal fan impeller according to claim 3, characterized in that, The outer tube (12) is a stainless steel hollow tube with an outer diameter of 70 mm and a wall thickness of 5 mm, and the inner tube (13) is a stainless steel hollow tube with an outer diameter of 60 mm and a wall thickness of 5 mm.

5. A tool for disassembling a large centrifugal fan impeller according to claim 1, characterized in that, The shaft disk connecting part (10) is a rectangular plate; The plate surface of the shaft disc connecting part (10) is perpendicularly connected to the telescopic rod.

6. A tool for disassembling a large centrifugal fan impeller according to claim 5, characterized in that, The shaft disk connecting part (10) has several threaded through holes a corresponding to the threaded holes on the shaft disk (8), and the bolts a (7) are set in the threaded through holes a.

7. A tool for disassembling a large centrifugal fan impeller according to claim 1, characterized in that, The support plate connecting part (11) is a rectangular plate, and the plate surface of the support plate connecting part (11) is parallel to the central axis of the inner tube (13); The support plate connecting part (11) has a through hole in the middle of the plate surface for the jack force support plate (1) to pass through.

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