A device and structure for disassembling and assembling a compressor impeller.

Abstract

This invention discloses a disassembly and assembly device and structure for a compressor impeller, which has the advantages of being labor-saving, convenient, and easy to operate. The disassembly and assembly device includes a connecting shaft and a lifting tool. One axial end of the connecting shaft is an impeller positioning part, and the other axial end is a lifting tool positioning part. A connecting flange is provided in the middle of the connecting shaft, forming an impeller limiting step between the connecting flange and the impeller positioning part. A lifting tool limiting step is formed between the lifting tool positioning part and the middle of the connecting shaft. Several impeller fastening screws are provided circumferentially on the connecting flange. A positioning block is provided at the lower end of the lifting tool. The positioning block is fitted onto the lifting tool positioning part with a clearance fit, forming a rotatable connection. The lifting tool positioning part has a limiting structure to limit the positioning block. The disassembly and assembly structure includes a disassembly and assembly device and a compressor impeller. The end of the compressor impeller has a positioning hole and several threaded holes, which respectively mate with the impeller positioning part and the impeller fastening screws.

Description

Technical Field

[0001] This invention relates to the field of turbocharger technology, and in particular to a device and structure for disassembling and assembling a compressor impeller. Background Technology

[0002] Turbochargers are typical components for diesel engines. Working together with a diesel engine, they can effectively increase the engine's output power.

[0003] When installing or removing turbochargers on a ship, due to the limited space, only one or two people are allowed to carry out the work. The tools used for installation and removal should be designed to be labor-saving, convenient, easy to operate, and practical.

[0004] In previous turbocharger disassembly and assembly methods, the compressor impeller was disassembled primarily by the installer manually aligning the impeller with the turbine shaft and rotating the impeller. This method presents the following problems when disassembling heavier compressor impellers:

[0005] a. The compressor impeller falls off. The compressor impeller is a high-precision and easily damaged part. If the compressor impeller falls off, it will damage the structure of the compressor impeller and make it unusable.

[0006] b. During the assembly of the compressor impeller and the turbine shaft threaded connection, it is not easy to align them. If the threads are misaligned, the compressor impeller threads will be easily damaged, thus destroying the compressor impeller structure. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a disassembly and assembly device and structure for a compressor impeller, which has the advantages of being labor-saving, convenient and easy to operate.

[0008] The objective of this invention is achieved as follows:

[0009] A device for disassembling and assembling a compressor impeller includes a connecting shaft and a lifting tool. One axial end of the connecting shaft is an impeller positioning part, and the other axial end of the connecting shaft is a lifting tool positioning part. A connecting flange is provided in the middle of the connecting shaft. An impeller limiting step is formed between the connecting flange and the impeller positioning part. A lifting tool limiting step is formed between the lifting tool positioning part and the middle of the connecting shaft. A plurality of impeller fastening screws are provided circumferentially on the connecting flange. A positioning block is provided at the lower end of the lifting tool. The positioning block is fitted onto the lifting tool positioning part with a clearance fit to form a rotatable connection. The lifting tool positioning part is provided with a limiting structure to limit the positioning block.

[0010] Preferably, the limiting structure includes a lifting device limiting bolt arranged axially on the lifting device positioning part, a limiting washer provided between the nut of the lifting device limiting bolt and the lifting device positioning part, and an installation space for the positioning block is formed between the limiting washer and the lifting device limiting step, wherein the axial length of the installation space is greater than the width of the positioning block.

[0011] Preferably, the impeller fastening screw is an internal hexagonal screw, and the lifting device limiting screw is a hexagonal head bolt.

[0012] Preferably, the hoisting tool is in the shape of a "┍", the positioning block is fixed to the lower end of the upright of the hoisting tool, and a shackle is provided at the end of the horizontal bar of the hoisting tool.

[0013] A disassembly and assembly structure for a compressor impeller includes a disassembly and assembly device for the compressor impeller and a compressor impeller. The end of the compressor impeller is provided with a positioning hole and several threaded holes. The impeller positioning part of the connecting shaft is inserted into the positioning hole of the compressor impeller to form radial positioning. Each impeller fastening screw on the connecting flange is respectively engaged with the threaded hole on the compressor impeller to fix the connecting shaft and the compressor impeller. The shackle is located directly above the compressor impeller.

[0014] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0015] a. It has the characteristics of being labor-saving, convenient, operable, and practical;

[0016] b. Compared to conventional manual operation, it reduces the required operating space, allowing even one person to complete the disassembly and assembly of the compressor impeller;

[0017] c. The compressor impeller is mounted using a rotatable structure, which facilitates the assembly and disassembly of the compressor impeller and turbine shaft. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the connecting shaft.

[0020] Figure 3 for Figure 2 A left-view diagram;

[0021] Figure 4 for Figure 2 A diagram showing the view from the right.

[0022] Figure Labels

[0023] In the attached diagram, 1-compressor impeller, 2-impeller fastening screw, 3-connecting flange, 4-lifting tool limit bolt, 5-limiting washer, 6-lifting tool, 7-shackle, 8-connecting shaft, and 9-positioning block. Detailed Implementation

[0024] See Figures 1-4 This is a device for disassembling and assembling a compressor impeller, comprising a connecting shaft and a lifting tool. One axial end (large cylindrical end) of the connecting shaft is an impeller positioning part, and the other axial end (small cylindrical end) of the connecting shaft is a lifting tool positioning part. A connecting flange is provided in the middle of the connecting shaft, and an impeller limiting step is formed between the connecting flange and the impeller positioning part. A lifting tool limiting step is formed between the lifting tool positioning part and the middle of the connecting shaft. Several impeller fastening screws are provided circumferentially on the connecting flange. The impeller fastening screws are hexagonal socket head cap screws. A positioning block is provided at the lower end of the lifting tool. The positioning block is fitted onto the lifting tool positioning part with a clearance fit to form a rotatable connection. The lifting tool positioning part is provided with a limiting structure to limit the positioning block.

[0025] The limiting structure includes a lifting tool limiting bolt axially arranged on the lifting tool positioning part. A limiting washer is provided between the nut of the lifting tool limiting bolt and the lifting tool positioning part. An installation space for the positioning block is formed between the limiting washer and the lifting tool limiting step. The axial length of the installation space is greater than the width of the positioning block. This allows the lifting tool to move axially within a small range on the connecting flange, preventing jamming and ensuring that the compressor impeller can rotate radially during lifting. The lifting tool limiting screw is a hexagonal head bolt. The lifting tool is "┍" shaped, the positioning block is fixed to the lower end of the lifting tool's upright, and a shackle is provided at the end of the lifting tool's crossbar.

[0026] A disassembly and assembly structure for a compressor impeller includes a disassembly and assembly device for the compressor impeller and a compressor impeller. The end of the compressor impeller is provided with a positioning hole and several threaded holes. The impeller positioning part of the connecting shaft is inserted into the positioning hole of the compressor impeller to form radial positioning. Each impeller fastening screw on the connecting flange is respectively engaged with the threaded hole on the compressor impeller to fix the connecting shaft and the compressor impeller. The shackle is located directly above the compressor impeller.

[0027] Installation method:

[0028] 1) Install the large cylindrical end of the connecting shaft 8 onto the air impeller 1 through the connecting flange 3, and use the air impeller fastening screw 2 to pass through the connecting flange hole and connect and fasten it to the air impeller screw hole, and fix the connecting flange 3 onto the air impeller.

[0029] 2) Install the lifting tool 6 on the small cylindrical end of the connecting shaft;

[0030] 3) Install the lifting tool limit bolt 4 and the limit washer 5 on the connecting shaft, and tighten the lifting tool limit bolt 4. At this time, the lifting tool 6 has a small axial movement distance on the connecting flange, and the lifting tool can rotate radially.

[0031] 4) The compressor impeller is fixed by the disassembly and assembly structure. The impeller is then hoisted to the turbine shaft by a hoisting tool and installed on the turbine shaft by rotating the compressor impeller.

[0032] Disassembly method:

[0033] 1) After connecting the impeller according to the disassembly and assembly structure of the compressor impeller, fix the turbine shaft, remove the compressor impeller by rotating it, and then lift the impeller away with a hoisting tool.

[0034] 2) Tighten the lifting device limit bolt 4 and remove the lifting device limit bolt 4 and limit washer 5;

[0035] 3) Remove hoisting tool 6;

[0036] 4) Tighten and remove the compressor impeller fastening screw 2, remove the connecting shaft, and the compressor impeller disassembly is complete.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A method for using a disassembly and assembly structure for a compressor impeller, characterized in that: Includes a device for disassembling and assembling the compressor impeller, and the compressor impeller itself. The disassembly and assembly device includes a connecting shaft and a lifting tool. One axial end of the connecting shaft is an impeller positioning part, and the other axial end of the connecting shaft is a lifting tool positioning part. A connecting flange is provided in the middle of the connecting shaft. An impeller limiting step is formed between the connecting flange and the impeller positioning part. A lifting tool limiting step is formed between the lifting tool positioning part and the middle of the connecting shaft. Several impeller fastening screws are provided on the connecting flange along the circumferential direction. A positioning block is provided at the lower end of the lifting tool. The positioning block is fitted onto the lifting tool positioning part with a clearance fit to form a rotatable connection. The lifting tool positioning part is provided with a limiting structure to limit the positioning block. The limiting structure includes a lifting device limiting bolt arranged axially on the lifting device positioning part, a limiting washer provided between the nut of the lifting device limiting bolt and the lifting device positioning part, and an installation space for the positioning block is formed between the limiting washer and the lifting device limiting step, the axial length of the installation space being greater than the width of the positioning block; The end of the air impeller is provided with a positioning hole and several threaded holes. The impeller positioning part of the connecting shaft is inserted into the positioning hole of the air impeller to form radial positioning. Each impeller fastening screw on the connecting flange is respectively engaged with the threaded hole on the air impeller to fix the connecting shaft and the air impeller. The shackle is located directly above the air impeller. The hoisting tool is shaped like a "┍", the positioning block is fixed to the lower end of the upright of the hoisting tool, and the end of the horizontal bar of the hoisting tool is provided with a shackle; Installation method: 1) Install the impeller positioning part of the connecting shaft onto the compressor impeller through the connecting flange, and use the impeller fastening screws to connect and fasten it to the threaded hole of the compressor impeller to fix the connecting flange onto the compressor impeller; 2) Install the lifting tools on the lifting device positioning part of the connecting shaft; 3) Install the lifting tool limit bolt and limit washer on the connecting shaft, and tighten the lifting tool limit bolt. At this time, the lifting tool has an axial movement distance on the connecting flange, and the lifting tool can rotate at the same time. 4) Use hoisting tools to lift the impeller to the turbine shaft, and install the compressor impeller onto the turbine shaft by rotating the compressor impeller; Disassembly method: 1) The assembly and disassembly structure of the compressor impeller: After connecting the compressor impeller, fix the turbine shaft, remove the compressor impeller by rotating it, and then lift the impeller away using hoisting tools; 2) Tighten the lifting device limit bolts and remove the lifting device limit bolts and limit washers; 3) Remove the hoisting tools; 4) Tighten and remove the impeller fastening screws, remove the connecting shaft, and the air impeller disassembly is complete.

2. The method of using the disassembly and assembly structure of the compressor impeller according to claim 1, characterized in that: The impeller fastening screw is an internal hexagonal head screw, and the lifting device limiting screw is a hexagonal head bolt.

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