Low-temperature-rise steam compressor rotor assembling and disassembling tool

Abstract

The low-temperature-rise steam compressor rotor assembling and disassembling tool comprises a sleeve, a first supporting base, a second supporting base and a hydraulic driving piece, an oil pipe mandrel is arranged in the sleeve, an oil channel is formed in a main shaft, one end of the oil channel penetrates through the end face of the main shaft and forms an oil inlet, and the other end of a hydraulic channel penetrates through the side face of the main shaft and forms an oil outlet; when the impeller is installed, one end of the first supporting seat is connected with one end of an impeller hub, the hydraulic driving piece is connected with the first supporting seat, one end of the sleeve is connected with the hydraulic driving piece, and the other end of the sleeve is connected with the main shaft. When the impeller is disassembled, one end of the second supporting seat is connected with the end provided with the impeller hub, the hydraulic driving piece is connected with the second supporting seat, one end of the sleeve is connected with the hydraulic driving piece, and the other end of the sleeve is connected with the main shaft. According to the utility model, the mounting and dismounting difficulty of the impeller is reduced, and the risk that an inner hole is scratched in the mounting and dismounting process is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steam compressors, in particular to a low-temperature steam compressor rotor assembly and disassembly tool. Background Art

[0002] The rotor structure of a low-temperature steam compressor consists of an impeller and a main shaft. The impeller is a welded structure characterized by a three-dimensional flow blade shape with narrow and long blade flow paths. The impeller is constructed of duplex stainless steel, while the main shaft is constructed of chromium-molybdenum alloy steel. The impeller rotates at a high speed, typically between 3000 and 6000 rpm. The connection between the impeller inner bore and the main shaft uses a tapered interference fit, and to ensure a secure connection, the interference fit is relatively large.

[0003] Since the impeller is made of duplex stainless steel and the main shaft is made of chromium-molybdenum steel, and the interference fit between the two is large, a large axial force is required to assemble and disassemble the impeller and the main shaft, making disassembly more difficult. During the disassembly process, due to the large friction between the inner hole of the impeller and the main shaft, the inner hole of the impeller can easily be scratched. Summary of the Invention

[0004] The purpose of the utility model is to solve the deficiencies in the prior art and provide a low-temperature steam compressor rotor assembly and disassembly tool.

[0005] The purpose of the utility model is achieved through the following technical solutions: a low-temperature steam compressor rotor assembly and disassembly tool, comprising a sleeve, a first support seat, a second support seat, and a hydraulic drive member, wherein an oil pipe core shaft is provided in the sleeve, an oil channel is provided on the main shaft, one end of the oil channel penetrates the end face of the main shaft and forms an oil inlet, and the other end of the hydraulic channel penetrates the side face of the main shaft and forms an oil outlet;

[0006] When installing the impeller, one end of the first support seat is connected to one end of the impeller hub, the hydraulic drive member is connected to the first support seat, one end of the sleeve is connected to the hydraulic drive member, and the other end of the sleeve is connected to the main shaft; one end of the oil pipe core shaft is connected to the oil inlet on the main shaft, and the other end of the oil pipe core shaft is connected to the hydraulic pump;

[0007] When disassembling the impeller, one end of the second support seat is connected to one end of the impeller hub, the hydraulic drive component is connected to the second support seat, one end of the sleeve is connected to the hydraulic drive component, and the other end of the sleeve is connected to the main shaft; one end of the oil pipe core shaft is connected to the oil inlet on the main shaft, and the other end of the oil pipe core shaft is connected to the hydraulic pump.

[0008] Preferably, the hydraulic driving component is a hydraulic nut, which is connected to a hydraulic pump.

[0009] Preferably, the first support seat is cylindrical.

[0010] Preferably, the second support seat includes a first disassembly flange and a second disassembly flange, and the first disassembly flange and the second disassembly flange are connected by a connecting screw; the first disassembly flange is connected to one end of the impeller hub, and the hydraulic drive component is arranged on the side of the second disassembly flange close to the first disassembly flange.

[0011] Preferably, a spacer is provided between the hydraulic drive component and the second disassembly flange.

[0012] Preferably, the end of the oil pipe core shaft connected to the oil inlet is provided with a first external thread, and the oil inlet is provided with a first internal thread matching the first external thread.

[0013] Preferably, a threaded body is provided at the end of the main shaft, and a threaded hole for connecting to the threaded body is provided on the end of the sleeve close to the main shaft.

[0014] Preferably, a countersunk hole is provided on the outer side of the sleeve at one end close to the hydraulic drive member.

[0015] The beneficial effects of the present invention are as follows: the present invention reduces the difficulty of installing and disassembling the impeller, and effectively reduces the risk of the inner hole being scratched during the installation and disassembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the utility model when the impeller is installed.

[0017] Figure 2 This is a schematic diagram of the utility model when the impeller is disassembled.

[0018] In the figure: 1. Hydraulic drive component, 2. Sleeve, 3. First support seat, 4. Oil pipe core shaft, 5. Second support seat, 5-1. First disassembly flange, 5-2. Second disassembly flange, 5-3. Connecting screw, 6. Spacer, 7. Impeller, 7-1. Impeller hub, 8. Main shaft. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0020] like Figures 1 to 2As shown, a low-temperature steam compressor rotor assembly and disassembly tool includes a sleeve 2, a first support seat 3, a second support seat 5, and a hydraulic drive member 1. An oil pipe core shaft 4 is provided in the sleeve 2, and an oil channel is provided on the main shaft 8. One end of the oil channel penetrates the end face of the main shaft 8 and forms an oil inlet, and the other end of the hydraulic channel penetrates the side face of the main shaft 8 and forms an oil outlet.

[0021] When installing the impeller 7, one end of the first support seat 3 is connected to one end of the impeller hub 7-1, the hydraulic drive member 1 is connected to the first support seat 3, one end of the sleeve 2 is connected to the hydraulic drive member 1, and the other end of the sleeve 2 is connected to the main shaft 8; one end of the oil pipe core shaft 4 is connected to the oil inlet on the main shaft 8, and the other end of the oil pipe core shaft 4 is connected to the hydraulic pump;

[0022] When the impeller 7 is disassembled, one end of the second support seat 5 is connected to one end of the impeller hub 7-1, the hydraulic drive component 1 is connected to the second support seat 5, one end of the sleeve 2 is connected to the hydraulic drive component 1, and the other end of the sleeve 2 is connected to the main shaft 8; one end of the oil pipe core shaft 4 is connected to the oil inlet on the main shaft 8, and the other end of the oil pipe core shaft 4 is connected to the hydraulic pump.

[0023] The oil pipe core shaft 4 is a tubular structure, and hydraulic oil can pass through the oil pipe core shaft 4.

[0024] The utility model can realize the installation and disassembly of the impeller 7. When installing the impeller 7, one end of the main shaft 8 is inserted into the inner hole of the impeller hub 7-1, so that the inner wall of the shaft hole is in close contact with the outer side of the main shaft 8. Hydraulic oil of a certain pressure is supplied to the hydraulic drive unit 1 and the oil pipe core shaft 4 by a hydraulic pump. The hydraulic drive unit 1 applies an axial force to the sleeve 2, pulling the sleeve 2 toward the direction of insertion into the inner hole. At the same time, the hydraulic oil is supplied to the oil channel on the main shaft 8 through the oil pipe core shaft 4. The hydraulic oil is then discharged from the oil outlet at one end of the oil channel and enters the space between the wall of the inner hole and the outer surface of the main shaft 8, thereby forming an oil film between the wall of the inner hole and the outer surface of the main shaft 8. The pressure of the hydraulic oil causes the inner hole to expand, thereby facilitating the insertion of the main shaft 8. After the impeller 7 is installed, the oil supply to the oil pipe core shaft 4 is stopped. At this time, the oil pressure acting on the inner hole disappears, and the inner hole shrinks and recovers. During the shrinking process, the inner hole firmly holds the main shaft 8, thereby effectively improving the tightness of the connection between the main shaft 8 and the impeller 7. During the installation process, since there is an oil film between the hole wall of the inner hole and the outer surface of the main shaft 8, the oil film can play a good lubricating role, which can reduce the friction between the main shaft 8 and the hole wall of the inner hole, thereby reducing the risk of the inner hole being scratched.

[0025] When the impeller 7 is disassembled, hydraulic oil of a certain pressure is introduced into the hydraulic drive component 1 and the oil pipe core shaft 4 through the hydraulic pump. The hydraulic drive component 1 applies axial force to the sleeve 2, and pulls the sleeve through the sleeve 2 to move in the direction of inserting into the inner hole; at the same time, the hydraulic oil is introduced into the oil channel on the main shaft 8 through the oil pipe core shaft 4, and then the hydraulic oil is discharged from the oil outlet at one end of the oil channel and enters between the hole wall of the inner hole and the outer surface of the main shaft 8, thereby forming an oil film between the hole wall of the inner hole and the outer surface of the main shaft 8, and under the action of the pressure of the hydraulic oil, the inner hole is expanded, thereby reducing the clamping force of the inner hole on the main shaft 8, so that the main shaft 8 can be pulled out from the inner hole of the impeller hub 7-1 more easily; during the disassembly process, the friction between the inner hole and the main shaft 8 is reduced due to the expansion of the inner hole under the action of the oil pressure, and there is an oil film between the hole wall of the inner hole and the outer surface of the main shaft 8, which can effectively reduce the risk of the inner hole being scratched during the disassembly process.

[0026] In this embodiment, the hydraulic driving member 1 is a hydraulic nut connected to a hydraulic pump. The hydraulic nut is a prior art.

[0027] The first support seat 3 is cylindrical.

[0028] The second support seat 5 includes a first disassembly flange 5-1 and a second disassembly flange 5-2, and the first disassembly flange 5-1 and the second disassembly flange 5-2 are connected by a connecting screw 5-3; the first disassembly flange 5-1 is connected to one end of the impeller hub 7-1, and the hydraulic drive component 1 is arranged on the side of the second disassembly flange 5-2 close to the first disassembly flange 5-1.

[0029] A spacer block 6 is provided between the hydraulic drive member 1 and the second disassembly flange 5-2. The spacer block 6 is used to adjust the distance between the hydraulic drive member 1 and the second disassembly flange 5-2.

[0030] One end of the oil pipe core shaft 4 connected to the oil inlet is provided with a first external thread, and the oil inlet is provided with a first internal thread matching the first external thread. One end of the oil pipe core shaft 4 is connected to the oil inlet on the main shaft 8 in a threaded connection.

[0031] The spindle 8 has a threaded body at its end, and the sleeve 2 has a threaded hole on its end near the spindle 8 for connection to the threaded body. The threaded body is cylindrical, with a second external thread on the outside of the threaded body and a second internal thread matching the second external thread on the inside of the threaded hole. When the sleeve 2 is connected to the spindle 8, the threaded hole on the sleeve 2 and the threaded body on the spindle 8 engage with each other.

[0032] The outer side of the sleeve 2 near the end of the hydraulic drive member 1 is provided with a countersunk hole. The countersunk hole is used to connect a handle, one end of the handle can be inserted into the countersunk hole, and the handle can be used to conveniently tighten the sleeve 2 and the threaded body on the main shaft 8, and also facilitate the disassembly of the sleeve 2 and the main shaft 8.

[0033] The utility model reduces the difficulty of installing and disassembling the impeller 7 and effectively reduces the risk of the inner hole being scratched during the installation and disassembly process.

[0034] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. A low temperature steam compressor rotor assembly and disassembly tool, characterized in that: The main shaft comprises a sleeve, a first support seat, a second support seat, and a hydraulic drive member. The sleeve is provided with an oil pipe core shaft. The main shaft is provided with an oil channel. One end of the oil channel passes through the end face of the main shaft and forms an oil inlet. The other end of the hydraulic channel passes through the side face of the main shaft and forms an oil outlet. When installing the impeller, one end of the first support seat is connected to one end of the impeller hub, the hydraulic drive member is connected to the first support seat, one end of the sleeve is connected to the hydraulic drive member, and the other end of the sleeve is connected to the main shaft; one end of the oil pipe core shaft is connected to the oil inlet on the main shaft, and the other end of the oil pipe core shaft is connected to the hydraulic pump; When disassembling the impeller, one end of the second support seat is connected to one end of the impeller hub, the hydraulic drive component is connected to the second support seat, one end of the sleeve is connected to the hydraulic drive component, and the other end of the sleeve is connected to the main shaft; one end of the oil pipe core shaft is connected to the oil inlet on the main shaft, and the other end of the oil pipe core shaft is connected to the hydraulic pump.

2. The low-temperature steam compressor rotor assembly and disassembly tool according to claim 1, characterized in that: The hydraulic driving component is a hydraulic nut, which is connected to a hydraulic pump.

3. The low-temperature steam compressor rotor assembly and disassembly tool according to claim 1, characterized in that: The first supporting seat is cylindrical.

4. The low-temperature steam compressor rotor assembly and disassembly tool according to claim 1, characterized in that: The second support seat includes a first disassembly flange and a second disassembly flange, and the first disassembly flange and the second disassembly flange are connected by a connecting screw; the first disassembly flange is connected to one end of the impeller hub, and the hydraulic drive component is arranged on the side of the second disassembly flange close to the first disassembly flange.

5. The low-temperature steam compressor rotor assembly and disassembly tool according to claim 4, characterized in that: A cushion block is provided between the hydraulic drive component and the second disassembly flange.

6. The low-temperature steam compressor rotor assembly and disassembly tool according to claim 1, characterized in that: One end of the oil pipe core shaft connected to the oil inlet is provided with a first external thread, and the oil inlet is provided with a first internal thread matching the first external thread.

7. The low-temperature steam compressor rotor assembly and disassembly tool according to claim 1, characterized in that: A threaded body is provided at the end of the main shaft, and a threaded hole for connecting with the threaded body is provided on one end of the sleeve close to the main shaft.

8. The low-temperature steam compressor rotor assembly and disassembly tool according to claim 1, characterized in that: A countersunk hole is provided on the outer side of one end of the sleeve close to the hydraulic drive component.

Images