Expansion machine shaft seal dismounting tool

Abstract

The utility model provides an expansion machine shaft seal dismounting tool which comprises an ejection mechanism, a sleeve formed by two sets of half blocks in a surrounding mode and a locking piece used for locking the two sets of half blocks, the sleeve is provided with a limiting component used for blocking a shaft sleeve, and when the sleeve is arranged on a main shaft in a penetrating and sleeving mode, the main shaft is ejected out of the shaft sleeve through the ejection mechanism; the ejection mechanism comprises a set of ejection rods arranged in the sleeve in a penetrating mode and a connecting sleeve rotationally installed at the end of the sleeve, and the connecting sleeve is in threaded connection with the ejection rods. The ejector rod and the connecting sleeve are each provided with a stress part used for being clamped by a wrench. The disassembling tool for the shaft seal of the expansion machine can be suitable for various working conditions such as a transverse shaft or a vertical shaft of the main shaft, does not need to use hydraulic equipment, a working table and other device structures, greatly improves the using flexibility of the disassembling tool, and facilitates disassembling and separating of the main shaft and the shaft seal of the expansion machine.

Description

Technical Field

[0001] The utility model relates to the field of expanders, and more specifically, to a disassembly tool for the shaft seal of an expander. Background Art

[0002] An expander is a high-speed and light-load rotating device, which is widely supported by oil bearings. In order to prevent the intermixing of process gas and bearing lubricating oil, a sealing structure is usually provided between the two. Currently, gas labyrinth seals are widely used in the industry. In the prior art, for small expander units, sealing teeth are machined on the main shaft. After the unit runs for a period of time and the sealing teeth are worn, the main shaft is directly replaced. As the unit continues to increase in size, the main shaft also increases. When the sealing teeth are worn, the cost of replacing the main shaft is high and the cycle is long. Therefore, in order to save costs, the sealing tooth section is changed to a shaft sleeve, and sealing teeth are machined on the shaft sleeve, and then the shaft sleeve is installed on the main shaft. Due to high-speed rotating machinery, the rotor dynamic balance requires high precision, and the parts on the rotor must be assembled firmly and not loosen. Therefore, the shaft sleeve is installed by hot shrinking with interference fit, but this installation method is very difficult to disassemble and a special tooling is required for disassembly.

[0003] Patent CN217142988U discloses a shaft sleeve automatic separation device, which can drive the ejector rod downward by a hydraulic cylinder to eject the shaft body from the shaft sleeve, and the operation is relatively convenient. However, when the above device is used, it is necessary to remove the assembly including the main shaft and the shaft sleeve from the equipment body and then separately place the assembly on the workbench for the separation operation of the shaft sleeve and the shaft body. However, in an expander, large main shafts are usually installed horizontally and are not easy to disassemble from the expander. Obviously, the above device cannot be well used for removing the shaft seal on the main shaft of the expander. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the shortcomings of the background art and provide a disassembly tool for the shaft seal of an expander.

[0005] The embodiments of the utility model are realized by the following technical solutions:

[0006] A disassembly tool for the shaft seal of an expander includes an ejection mechanism, a sleeve formed by enclosing two half-blocks, and a locking member for locking the two half-blocks. The sleeve is provided with a limiting member for blocking the shaft sleeve, so that when the sleeve is sleeved on the main shaft, the main shaft can be ejected from the shaft sleeve through the ejection mechanism.

[0007] The ejection mechanism includes a set of ejector rods passing through the sleeve, and a connecting sleeve rotatably installed at the end of the sleeve. The connecting sleeve is threadedly connected to the ejector rod. Force-applying portions for clamping by a wrench are provided on both the ejector rod and the connecting sleeve.

[0008] Further, the sleeve includes a large-diameter section and a small-diameter section arranged coaxially, and the large-diameter section and the small-diameter section are transitionally connected through a diameter-changing section; the locking member is sleeved on the small-diameter section.

[0009] Further, the locking member is a hoop or a locking ring sleeved on the outer wall of the sleeve.

[0010] Further, the ejector rod is a set of bolts.

[0011] Further, the sleeve has opposite first and second ends. Among them, the small-diameter section is arranged at the first end of the sleeve, and the large-diameter section is arranged at the second end of the sleeve;

[0012] The limiting member is arranged on the inner wall of the second end of the sleeve, and the connecting sleeve is rotatably connected to the first end of the sleeve.

[0013] Further, the limiting member includes an annular groove opened on the inner wall of the sleeve; the outer wall of the shaft sleeve has an annular extension portion, and the extension portion is clamped in the annular groove.

[0014] Further, a convex ring is arranged on the outer wall of the connecting sleeve, and the convex ring abuts against the inner wall of the first end of the sleeve to prevent the connecting sleeve from sliding out of the first end of the sleeve.

[0015] The technical solution of the embodiment of the present utility model has at least the following advantages and beneficial effects:

[0016] When the expander shaft seal disassembly tooling of the present utility model is in use, the sleeve composed of two groups of split blocks is sleeved on the main shaft and the shaft seal, and the limiting member arranged inside the sleeve blocks and limits the shaft sleeve; with the help of a wrench to clamp and fix the connecting sleeve, and another wrench to clamp and screw the ejector rod to push the main shaft out of the shaft seal; the above disassembly tooling can be applicable to various working conditions such as the horizontal or vertical placement of the main shaft, without removing the main shaft from the expander, and without relying on device structures such as hydraulic equipment and workbenches, greatly improving the flexibility of the use of the disassembly tooling and facilitating the disassembly and separation of the expander main shaft and the shaft seal. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the expander shaft seal disassembly tooling of the present utility model;

[0018] Figure 2 is a use state diagram of the expander shaft seal disassembly tooling of the present utility model;

[0019] Icon: 1 - ejection mechanism, 10 - ejector rod, 11 - connecting sleeve, 110 - convex ring, 12 - stress part, 2 - sleeve, 20 - half block, 200 - small diameter section, 201 - diameter-changing section, 202 - large diameter section, 203 - limiting component, 2030 - annular groove, 21 - locking component, 3 - bushing, 30 - extension part, 4 - main shaft, 5 - wrench. Detailed implementation mode

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0022] Refer to Figure 1 and Figure 2 , the present utility model discloses a disassembly tooling for an expander shaft seal, including an ejection mechanism 1 and a sleeve 2.

[0023] Among them, the sleeve 2 is surrounded by two groups of half blocks 20 and locked into one body by a locking component 21; in addition, a limiting component 203 for blocking the bushing 3 is also provided on the sleeve 2. Refer to Figure 2 , when the sleeve 2 is sleeved on the bushing 3 and the main shaft 4, the bushing 3 is blocked and limited in the sleeve 2 by the limiting component 203, and the main shaft 4 can be ejected from the bushing 3 along the axial direction of the sleeve 2 by a set of ejection mechanism 1, so that the bushing 3 is separated from the main shaft 4.

[0024] Specifically, the ejection mechanism 1 can be various mechanical devices such as hydraulic cylinders, pneumatic cylinders, jacks or manual ejection devices. In this embodiment, the ejection mechanism 1 includes an ejector rod 10 and a connecting sleeve 11. Among them, the ejector rod 10 is axially inserted through the sleeve 2 in the direction of the axis of the sleeve 2, and the connecting sleeve 11 is rotatably installed at one end of the sleeve 2 in the axial direction. The connecting sleeve 11 is threadedly connected to the ejector rod 10. Stress parts 12 for clamping by the wrench 5 are provided on both the ejector rod 10 and the connecting sleeve 11. During use, a set of wrenches 5 clamp and fix the connecting sleeve 11, and another set of wrenches 5 clamp and screw the ejector rod 10 to make the ejector rod 10 move axially in the sleeve 2 along the axial direction of the sleeve 2, so that the bushing 3 moves axially on the main shaft 4. Refer to Figure 2, Finally, the bushing 3 slides out from the left end of the main shaft 4.

[0025] During the use of the above disassembly tooling, the main shaft 4 is always horizontally placed and fixed in the expander. Through this disassembly tooling, finally, the bushing 3 is disengaged from the main shaft 4.

[0026] Refer to Figure 1 , in this embodiment, the sleeve 2 includes a large-diameter section 202 and a small-diameter section 200 arranged coaxially, and the large-diameter section 202 and the small-diameter section 200 are connected by a tapered section 201 in a transitional manner. The locking member 21 is sleeved on the small-diameter section 200. Due to the limitation of the tapered section 201, the locking member 21 will not displace axially during use, making the locking effect of the locking member 21 on the sleeve 2 better.

[0027] Among them, the locking member 21 can be a hoop or a locking ring sleeved on the outer wall of the sleeve 2.

[0028] Refer to Figure 1 and Figure 2 , in this embodiment, the ejector rod 10 is a set of bolts, and the force-receiving part 12 on the ejector rod 10 is the hexagonal head of the screw. Correspondingly, the wrench 5 can also be replaced with a sleeve structure locked on the hexagonal head.

[0029] Among them, it is defined that the sleeve 2 has opposite first and second ends. Among them, the small-diameter section 200 is arranged at the first end of the sleeve 2, and the large-diameter section 202 is arranged at the second end of the sleeve 2; then, the limiting member 203 is arranged on the inner wall of the second end of the sleeve 2, and the connecting sleeve 11 is rotatably connected to the first end of the sleeve 2.

[0030] Specifically, in this embodiment, the limiting member 203 includes an annular groove 2030 opened on the inner wall of the sleeve 2. The outer wall of the bushing 3 has an annular extension 30. After the two sets of half-blocks 20 are closed, the extension 30 is clamped in the annular groove 2030; in addition, a convex ring 110 is provided on the outer wall of the connecting sleeve 11, and the convex ring 110 abuts against the inner wall of the first end of the sleeve 2 to limit the connecting sleeve 11 from sliding out of the first end of the sleeve 2.

[0031] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An expansion machine shaft seal disassembly tooling, comprising an ejection mechanism (1), a sleeve (2) formed by enclosing two groups of half blocks (20), and a locking member (21) for locking the two groups of the half blocks (20). A limiting member (203) for blocking the shaft sleeve (3) is provided on the sleeve (2), so that when the sleeve (2) is sleeved on the main shaft (4), the main shaft (4) is ejected from the shaft sleeve (3) by the ejection mechanism (1); characterized in that: The ejection mechanism (1) includes a set of ejector rods (10) inserted into the sleeve (2), and a connecting sleeve (11) rotatably installed at the end of the sleeve (2). The connecting sleeve (11) is threadedly connected to the ejector rod (10); force-applying portions (12) for clamping by a wrench (5) are provided on both the ejector rod (10) and the connecting sleeve (11).

2. The expander shaft seal disassembly tooling according to claim 1, characterized in that, The sleeve (2) includes a large-diameter section (202) and a small-diameter section (200) arranged coaxially, and the large-diameter section (202) and the small-diameter section (200) are connected by a tapered section (201) in a transitional manner; the locking member (21) is sleeved on the small-diameter section (200).

3. The expander shaft seal disassembly tooling according to claim 2, characterized in that, The locking member (21) is a hoop or a locking ring sleeved on the outer wall of the sleeve (2).

4. The expander shaft seal disassembly tooling according to claim 1, characterized in that The ejector rod (10) is a set of bolts.

5. The expansion machine shaft seal disassembly tooling according to claim 2 or 3, characterized in that The sleeve (2) has opposite first and second ends. Among them, the small-diameter section (200) is arranged at the first end of the sleeve (2), and the large-diameter section (202) is arranged at the second end of the sleeve (2); The limiting member (203) is arranged on the inner wall of the second end of the sleeve (2), and the connecting sleeve (11) is rotatably connected to the first end of the sleeve (2).

6. The expansion machine shaft seal disassembly tooling according to claim 5, wherein, The limiting member includes an annular groove (2030) opened on the inner wall of the sleeve (2); an annular extension portion (30) is provided on the outer wall of the shaft sleeve (3), and the extension portion (30) is clamped in the annular groove (2030).

7. The expander shaft seal disassembly tooling according to claim 5, characterized in that, A convex ring (110) is provided on the outer wall of the connecting sleeve (11), and the convex ring (110) abuts against the inner wall of the first end of the sleeve (2) to prevent the connecting sleeve (11) from sliding out of the first end of the sleeve (2).

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