A tool for disassembling and assembling the pump shaft of a cantilever centrifugal pump

Abstract

This invention relates to the field of rotating equipment assembly technology, specifically disclosing a tool for disassembling and assembling the shaft of a cantilever centrifugal pump. During the disassembly process, the tool is placed on a horizontal working surface, with the drive end of the pump shaft facing downwards inside the tool. This allows the bearing housing flange to engage with the upper edge of the tool, facilitating the disassembly of the pump shaft. Using this tool, the bearing housing can be vertically fixed, enabling vertical disassembly and assembly of the pump shaft. The entire disassembly and assembly process ensures the perpendicularity of the pump shaft and bearing housing, preventing jamming and damage to the pump shaft and bearing.

Description

Technical Field

[0001] The invention belongs to the technical field of rotating equipment assembly, and in particular relates to a tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump. Background Art

[0002] The disassembly and assembly of the cantilever centrifugal pump shaft is one of the most critical quality steps in the maintenance process of nuclear power equipment. The verticality of the pump shaft and the bearing chamber will directly affect the disassembly and assembly quality and construction period. The cantilever centrifugal pump shaft disassembly and assembly of a nuclear power plant currently adopts a general horizontal installation method, which mainly has the following problems:

[0003] 1. When disassembling and assembling the pump shaft, it is necessary to manually adjust the verticality with the bearing chamber, which often leads to the problem of difficulty in disassembly and assembly. There is also the risk of damage to the pump shaft and bearing, which seriously affects the quality and duration of maintenance.

[0004] 2. When disassembling and assembling the pump shaft, the bearing chamber needs to be fixed manually, which poses a risk of damage to the bearing chamber.

[0005] Therefore, there is an urgent need to design a tool to solve similar problems. Summary of the invention

[0006] The purpose of the present invention is to provide a tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump, so as to realize vertical disassembly and assembly of the pump shaft.

[0007] The technical solution of the present invention is as follows:

[0008] The utility model relates to a tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump. The tool is a cylindrical structure, and the pump shaft is placed inside the tool for disassembling and assembling the pump shaft.

[0009] An observation hole is arranged on the side wall of the tool for observing whether the pump shaft is disassembled or installed smoothly.

[0010] There are M observation holes, M≥2.

[0011] An operating hole is provided at the upper edge of the tool for observation and auxiliary handling operations to prevent personnel from being injured during work.

[0012] There are N operating holes, where N≥2.

[0013] The inner diameter of the tool is larger than the diameter of the bearing chamber and smaller than the diameter of the bearing chamber flange surface.

[0014] During the disassembly of the pump shaft of a cantilever centrifugal pump, the tool is placed on a horizontal working surface, and the driving end of the pump shaft is placed downward inside the tool so that the bearing chamber flange surface is stuck on the upper edge of the tool to perform the disassembly of the pump shaft.

[0015] During the installation of the pump shaft of a cantilever centrifugal pump, the tool is placed on a horizontal working surface, and the non-driving end of the pump shaft is placed downward inside the tool so that the bearing chamber flange surface is stuck on the upper edge of the tool to install the pump shaft.

[0016] An observation hole is provided on the side wall of the tool for observing whether the pump shaft is disassembled or installed smoothly;

[0017] An operating hole is provided at the upper edge of the tool for observation, carrying and auxiliary operations to prevent personnel from being injured during work;

[0018] The inner diameter of the tool is larger than the diameter of the bearing chamber and smaller than the diameter of the bearing chamber flange surface.

[0019] During the disassembly of the pump shaft of a cantilever centrifugal pump, the tool is placed on a horizontal working surface, and the driving end of the pump shaft is placed downward inside the tool so that the flange surface of the bearing chamber is stuck on the upper edge of the tool to disassemble the pump shaft;

[0020] During the installation of the pump shaft of a cantilever centrifugal pump, the tool is placed on a horizontal working surface, and the non-driving end of the pump shaft is placed downward inside the tool so that the bearing chamber flange surface is stuck on the upper edge of the tool to install the pump shaft.

[0021] The remarkable effects of the present invention are:

[0022] (1) The tool of the present invention can be used to vertically fix the bearing chamber, thereby realizing vertical disassembly and assembly of the pump shaft. The verticality of the pump shaft and the bearing chamber can be ensured during the entire disassembly and assembly process, thereby avoiding jamming and damage to the pump shaft and bearing.

[0023] (2) The tool of the present invention can change the disassembly and assembly method of the pump shaft, thus saving maintenance time.

[0024] (3) The tool of the present invention provides good support for the bearing chamber, and at the same time takes into account the convenience of manual operation, and sets operation holes and observation holes to prevent personnel from being injured during work.

[0025] (4) The tool of the present invention has a simple structure, suitable weight, and is easy to use.

[0026] (5) The present invention has reference significance for the design of pump shaft disassembly and assembly tools for other types of rotating equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the tool structure;

[0028] Figure 2 This is a schematic diagram of the use of tools when removing the pump shaft;

[0029] Figure 3 This is a schematic diagram showing the use of the tool when installing it on the pump shaft.

[0030] In the figure: 1-tool; 2-operation hole; 3-observation hole; 4-pump shaft; 5-bearing chamber. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 The tool 1 shown in the figure for disassembling and assembling the pump shaft of a cantilever centrifugal pump is of a cylindrical structure, and its inner diameter is larger than the diameter of the bearing chamber 5 and smaller than the diameter of the flange surface of the bearing chamber.

[0033] An operating hole 2 is provided at the upper edge of the tool 1 for auxiliary operations such as observation and transportation to prevent personnel from being injured during work.

[0034] There are N operating holes 2, where N≥2.

[0035] An observation hole 3 is provided on the side wall of the tool 1 for observing whether the pump shaft 4 is successfully disassembled or installed.

[0036] There are M observation holes 3, where M≥2.

[0037] like Figures 2-3 As shown, during the disassembly and assembly of the pump shaft of the cantilever centrifugal pump, the tool 1 is placed on a horizontal working surface;

[0038] Place the driving end of the pump shaft 4 downward inside the tool 1 so that the flange surface of the bearing chamber is stuck on the upper edge of the tool 1, and then disassemble the pump shaft 4;

[0039] Place the non-driving end of the pump shaft 4 downward inside the tool 1 so that the flange surface of the bearing chamber is clamped on the upper edge of the tool 1, and then install the pump shaft 4.

Claims

1. A tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump, characterized in that: The tool (1) is a cylindrical structure, and the pump shaft (4) is placed inside the tool (1) to perform disassembly and assembly of the pump shaft (4); The inner diameter of the tool (1) is larger than the diameter of the bearing chamber (5) and smaller than the diameter of the flange surface of the bearing chamber; During the process of disassembling or installing the pump shaft of the cantilever centrifugal pump, the tool (1) is placed on a horizontal working surface, and the pump shaft (4) is placed inside the tool (1) so that the flange surface of the bearing chamber is clamped on the upper edge of the tool (1).

2. A tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump according to claim 1, characterized in that: An observation hole (3) is provided on the side wall of the tool (1).

3. A tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump according to claim 2, characterized in that: There are M observation holes (3), where M≥2.

4. A tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump according to claim 1, characterized in that: An operating hole (2) is provided at the upper edge of the tool (1).

5. A tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump according to claim 4, characterized in that: The number of the operating holes (2) is N, where N≥2.

6. A tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump according to any one of claims 1 to 5, characterized in that: During the process of disassembling the pump shaft of the cantilever centrifugal pump, the tool (1) is placed on a horizontal working surface, and the driving end of the pump shaft (4) is placed downward inside the tool (1), so that the bearing chamber flange surface is clamped on the upper edge of the tool (1), and the pump shaft (4) is disassembled.

7. A tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump according to any one of claims 1 to 5, characterized in that: During the installation of the pump shaft of the cantilever centrifugal pump, the tool (1) is placed on a horizontal working surface, and the non-driving end of the pump shaft (4) is placed downward inside the tool (1), so that the flange surface of the bearing chamber is clamped on the upper edge of the tool (1), and the pump shaft (4) is installed.

8. A tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump according to claim 1, characterized in that: An observation hole (3) is provided on the side wall of the tool (1); and an operation hole (2) is provided at the upper edge of the tool (1).

9. A tool for disassembling and assembling a pump shaft of a cantilever centrifugal pump according to claim 8, characterized in that: During the process of disassembling the pump shaft of the cantilever centrifugal pump, the tool (1) is placed on a horizontal working surface, and the driving end of the pump shaft (4) is placed downward inside the tool (1), so that the bearing chamber flange surface is clamped on the upper edge of the tool (1), and the pump shaft (4) is disassembled; During the installation of the pump shaft of the cantilever centrifugal pump, the tool (1) is placed on a horizontal working surface, and the non-driving end of the pump shaft (4) is placed downward inside the tool (1), so that the flange surface of the bearing chamber is clamped on the upper edge of the tool (1), and the pump shaft (4) is installed.

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