A centrifugal compressor impeller dismounting tool

Abstract

The utility model discloses a kind of centrifugal compressor impeller dismounting frock, by pull rod and fixed disc connection, and multiple clamping plates are uniformly provided in the circumferential direction of fixed disc, and the upper end of clamping plate is rotatably connected with fixed disc. By the rotation of multiple clamping plates and mutual approach, the distance between clamping plates can be changed according to the actual size of impeller, so that multiple clamping plates are clamped on the side wall of impeller, and the bottom end of impeller is hooked by hook plate. At this time, pull up the pull rod, and then drive the impeller to move upward, complete the dismounting of impeller.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal compressors, and specifically relates to a centrifugal compressor impeller disassembly tool. Background Technology

[0002] A centrifugal compressor is a pressure-generating machine, a type of impeller compressor. In a centrifugal compressor, gas movement occurs radially perpendicular to the compressor shaft. To shorten the distance between gas molecules and increase gas pressure, a gas dynamics approach is employed. This involves using a high-speed rotating impeller to perform work on the gas, increasing its pressure and kinetic energy under centrifugal force. This kinetic energy is then converted into static pressure energy within the diffuser, further increasing the gas pressure.

[0003] There are two main methods for disassembling and assembling centrifugal compressor impellers: manual disassembly and disassembly using tools. For centrifugal compressors with smaller, lighter impellers, manual disassembly is possible. For centrifugal compressors with larger, heavier impellers, tools are generally used for disassembly.

[0004] Manual disassembly is inefficient and poses certain safety hazards. Existing disassembly and assembly tools, due to their relatively simple structure, can only disassemble and assemble impellers of a single size, thus limiting their versatility. Utility Model Content

[0005] The purpose of this utility model is to provide a centrifugal compressor impeller disassembly tool to solve the technical problems of low efficiency and safety hazards in manual disassembly of impellers in the prior art; and the simple structure and poor applicability of the existing disassembly tool.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A centrifugal compressor impeller disassembly fixture is characterized by comprising a lifting rod, the lower end of which is fixedly connected to the top of a fixed disk; the lifting rod is collinear with the central axis of the fixed disk.

[0008] The fixed disk has multiple clamping plates evenly arranged circumferentially on its sidewalls; the upper ends of all the clamping plates are rotatably connected to the fixed disk, and the bottoms of all the clamping plates can be rotated to move closer to or away from the central axis of the fixed disk; each clamping plate has a hook plate connected to its inner bottom side, and the angle between the hook plate and the corresponding clamping plate is an acute angle.

[0009] The space formed between all the clamping plates is capable of clamping the bottom of the centrifugal compressor impeller.

[0010] This utility model also has the following features:

[0011] Furthermore, the fixed disk sidewall is uniformly provided with 4 clamping plates along the circumference.

[0012] Furthermore, the sidewall of the fixed disk is evenly provided with hinge slots along the circumference, corresponding to the number of clamping plates, and each hinge slot is provided with a corresponding hinge shaft; all the hinge shafts are horizontally arranged.

[0013] Furthermore, the clamping plate is connected to the hinge shaft one by one through the hinge holes.

[0014] Furthermore, a cylindrical limiting block is provided at the center of the bottom of the fixed plate.

[0015] The limiting block is collinear with the central axis of the fixed plate; the lower part of the outer wall of the limiting block is detachably equipped with a first hanging ring corresponding to the clamping plate; and a second hanging ring is provided on the lower inner side of all the clamping plates.

[0016] The first hanging ring is rotatably connected to one end of the first tension spring via a first hook, and the other end of the first tension spring is rotatably connected to the second hanging ring via a second hook.

[0017] All of the second hooks described are located on the same horizontal plane.

[0018] Furthermore, the limiting block has a hollow structure.

[0019] Furthermore, a vertical through hole is provided in the center of the fixed plate;

[0020] The upper part of the limiting block enters the through hole and can move vertically within the through hole; a first limiting ring is sleeved in the middle of the limiting block, and the outer diameter of the first limiting ring is larger than the diameter of the through hole.

[0021] The bottom of the lifting rod is fixedly connected to one end of the second tension spring; the other end of the second tension spring is fixedly connected to the upper part of the limiting block.

[0022] Furthermore, a connecting block is detachably installed at the bottom of the lifting rod; the outer diameter of the connecting block is smaller than the diameter of the through hole, and it is fixedly connected to the top of the second tension spring.

[0023] Furthermore, a second limiting ring is provided at the center of the top of the fixed plate; the inner diameter of the second limiting ring is equal to the diameter of the through hole, and it is arranged collinearly with the central axis of the through hole.

[0024] The second tension spring enters the second limiting ring and connects with the connecting block.

[0025] Furthermore, the centrifugal compressor impeller disassembly fixture is characterized in that a protective plate is provided on the upper surface of the hook plate.

[0026] Furthermore, the centrifugal compressor impeller disassembly fixture is characterized in that the lifting rod is a rubber lifting rod.

[0027] Compared with the prior art, this utility model has the following technical effects:

[0028] (I) The centrifugal compressor impeller disassembly fixture of this utility model is connected to a fixed plate via a lifting rod, and multiple clamping plates are evenly arranged around the fixed plate. The upper end of the clamping plates is rotatably connected to the fixed plate. By rotating and bringing the multiple clamping plates closer to each other, the distance between the clamping plates can be changed according to the actual size of the impeller, so that the multiple clamping plates clamp the side wall of the impeller, while the hook plate hooks the bottom end of the impeller. At this time, pulling up the lifting rod will drive the impeller to move upward, thus completing the disassembly of the impeller.

[0029] (II) The centrifugal compressor impeller disassembly fixture of this utility model has a connecting block at the bottom of the fixed plate, and multiple first hanging rings on the connecting block. Corresponding second hanging rings are provided on the clamping plates, and the corresponding first and second hanging rings are connected by a first tension spring. When lifted, the tension spring is stretched, providing a reverse locking force in the horizontal direction, allowing the multiple clamping plates to firmly hold the impeller sidewall, preventing loosening and improving the reliability of the device. Furthermore, a through hole is provided on the fixed plate, allowing the connecting block to slide into the through hole and connect the bottom of the second tension spring to the connecting block. When the lifting rod moves upward, it can drive the second tension spring to tighten, thereby driving the multiple clamping plates to firmly hold the impeller sidewall, further improving the reliability of the device and making it suitable for large-scale industrial use and promotion. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the centrifugal compressor impeller disassembly fixture and impeller connection of this utility model;

[0031] Figure 2 This is a schematic diagram showing the connection relationship between the lifting rod and the connecting block of this utility model;

[0032] Figure 3 This is a schematic diagram of the fixing plate and clamping plate of this utility model;

[0033] Figure 4 This is a schematic diagram of the first hanging ring structure in one embodiment of this utility model.

[0034] The labels in the diagram represent the following: 1. Lifting rod; 2. Fixed plate; 3. Clamping plate; 4. Impeller; 5. First tension spring; 6. First limiting ring; 7. Second tension spring; 8. Connecting block; 9. Second limiting ring;

[0035] 201, Hinge shaft; 301, Hook plate; 302, Hinge hole; 303, Second hanging ring; 401, First hanging ring; 501, First hook; 502, Second hook; 3011, Protective plate. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, all components in this invention are known in the prior art. For example, the impeller uses a commonly known impeller.

[0037] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0038] like Figures 1 to 3 As shown, a centrifugal compressor impeller disassembly fixture includes a lifting rod 1, the lower end of which is fixedly connected to the top of a fixed plate 2; the lifting rod 1 and the central axis of the fixed plate 2 are collinear.

[0039] Multiple clamping plates 3 are evenly arranged circumferentially on the side wall of the fixed disk 2; the upper end of all clamping plates 3 is rotatably connected to the fixed disk 2, and the bottom of all clamping plates 3 can be rotated to approach or move away from the central axis of the fixed disk 2; each clamping plate 3 has a hook plate 301 connected to the inner side of its bottom, and the included angle between the hook plate 301 and the corresponding clamping plate 3 is an acute angle.

[0040] The space formed between all the clamping plates 3 is able to clamp the bottom of the centrifugal compressor impeller 10.

[0041] The impeller 10 is connected to the fixed plate 2 via a lifting rod 1. Multiple clamping plates 3 are evenly arranged around the circumference of the fixed plate 2, with their upper ends rotatably connected to the fixed plate 2. By rotating and bringing the clamping plates 3 closer together, the distance between them can be adjusted according to the actual size of the impeller, causing the clamping plates 3 to grip the sidewall of the impeller, while the hook plates hook the bottom end of the impeller 10. At this point, pulling up the lifting rod 1 causes the impeller 10 to move upwards, completing the disassembly of the impeller 10.

[0042] The second limiting ring 9 is fixedly connected to the lower end of the connecting block. When the lifting rod 1 moves, the connecting block moves up and down under the extension and retraction of the second tension spring 7. Then, the second limiting ring 9 interacts with the upper end surface of the fixed plate 2. During the extension and retraction of the second tension spring 7, the movement trajectory is limited to the plane range determined by the upper end surface of the fixed plate 2. At the same time, since the lower end of the second tension spring 7 is connected to the connecting block, the second limiting ring 9 restricts the horizontal displacement of the connecting block, thereby indirectly restricting the horizontal sway of the second tension spring 7, ensuring its stable extension and retraction in the vertical direction, and ensuring the normal operation of the tooling.

[0043] Impeller 10 is the impeller of a conventional centrifugal compressor.

[0044] As a preferred option, four clamping plates 3 are evenly arranged circumferentially on the side wall of the fixing plate 2. This arrangement provides the best fixing effect in a cost-effective environment.

[0045] As a preferred embodiment, the sidewall of the fixed disk 2 is provided with hinge shafts 201 evenly distributed along the circumference, corresponding to the number of clamping plates 3; all hinge shafts 201 are horizontally arranged.

[0046] All clamping plates 3 have hinge holes 302 on their upper parts that match the hinge shaft 201. The clamping plates 3 are connected to the hinge shaft 201 one by one through the hinge holes 302.

[0047] The clamping plate 3 is rotatably connected to the side wall of the fixed disk 2 through the hinge hole 302, ensuring the connection strength and improving the reliability of the device.

[0048] In a further preferred embodiment, a cylindrical limiting block 4 is provided at the center of the bottom of the fixed disk 2.

[0049] The limiting block 4 is collinear with the central axis of the fixed plate 2; the lower part of the outer wall of the limiting block 4 is detachably equipped with a first hanging ring 401 that is equal in number and corresponds one-to-one with the clamping plate 3; a second hanging ring 303 is provided on the lower inner side of all clamping plates 3.

[0050] The first hanging ring 401 is rotatably connected to one end of the first tension spring 5 via the first hook 501, and the other end of the first tension spring 5 is rotatably connected to the second hanging ring 303 via the second hook 502.

[0051] All second hooks 502 are located on the same horizontal plane.

[0052] During use, the first tension spring 5 is stretched, providing a horizontal locking force to the clamping plate 3, which further improves the stability of the lifting.

[0053] Further preferably, the limiting block 4 has a hollow structure, which reduces the weight of the device and makes it easier to lift.

[0054] As a preferred embodiment, a vertical through hole is provided in the middle of the fixed plate 2;

[0055] The upper part of the limiting block 4 enters the through hole and can move vertically within the through hole; a first limiting ring 6 is provided in the middle of the limiting block 4, and the outer diameter of the first limiting ring 6 is larger than the diameter of the through hole.

[0056] The bottom of the lifting rod 1 is fixedly connected to one end of the second tension spring 7; the other end of the second tension spring 7 is fixedly connected to the upper part of the limiting block 4.

[0057] When the lifting rod 1 is pulled up, the second tension spring 7 drives the limit block 4 to move upward, pulling the first tension spring 5, which in turn causes the multiple clamping plates 3 to tighten, further improving the reliability of the device.

[0058] In practical use, the lifting rod 1 serves as the force application point. The operator applies pulling force through the lifting rod 1, which then pulls the second tension spring 7. The second tension spring 7 is connected to the fixed plate 2, and multiple first tension springs 5 ​​are distributed at the lower end of the fixed plate 2. The overall force is distributed, ensuring the stability of the overall force.

[0059] Those skilled in the art are capable of using tension springs with elastic potential energy and strength that meet the actual strength requirements. In industrial applications, the strength of the spring is usually redundant for the overall strength requirements of the equipment, thereby avoiding the problem of the spring itself being damaged by tension.

[0060] Preferably, a connecting block 8 is detachably installed at the bottom of the lifting rod 1; the outer diameter of the connecting block 8 is smaller than the diameter of the through hole, and it is fixedly connected to the top of the second tension spring 7.

[0061] During disassembly, first remove all the first hanging rings 401, then separate the second tension spring 7 from the connecting block 8. This allows the limiting block 4 to be pulled out from below the fixed plate 2, and the lifting rod 1 to be pulled out from above the fixed plate 2. The reverse is also true. This design facilitates the installation and disassembly of the device.

[0062] In a further preferred embodiment, a bolt is provided on the first hanging ring 401, and a bolt hole of matching specifications is opened at the corresponding position of the limiting block 4, so that the first hanging ring 401 and the limiting block 4 can be detachably connected.

[0063] In a further preferred embodiment, a second limiting ring 9 is provided at the center of the top of the fixed disk 2; the inner diameter of the second limiting ring 9 is equal to the diameter of the through hole, and it is arranged collinearly with the central axis of the through hole.

[0064] The second tension spring 7 enters the second limiting ring 9 and connects with the connecting block 8.

[0065] The second limiting ring 9 serves to limit the swaying of the second tension spring 7, thereby improving the stability of the device during operation.

[0066] As a preferred embodiment, a protective plate 3011 is provided on the upper surface of the hook plate 301 to prevent the impeller 10 from directly contacting the hook plate 301 and causing damage.

[0067] According to conventional choices in the art, the protective plate 3011 is made of a soft material. Soft materials include materials with good elasticity and friction, such as natural rubber. Based on the use of a soft material, when the protective plate 3011 clamps the impeller body 4, the protective plate 3011 is in contact with the impeller. When the impeller is disassembled, the elasticity of the protective plate 3011 can buffer the impact force brought by the spring contraction, while the greater friction can prevent the impeller from flying out due to vibration.

[0068] The hook plate 301 at the lower end of the clamping plate 3 hooks onto the bottom of the impeller, further restricting the movement of the impeller and ensuring that the impeller will not fly out during the entire disassembly process, thus protecting personnel safety and preventing damage to the impeller.

[0069] As a preferred option, the lifting rod 1 is a rubber lifting rod, which increases friction and makes it easier to grip.

Claims

1. A centrifugal compressor impeller disassembly fixture, characterized in that, Includes a lifting rod (1), the lower end of which is fixedly connected to the top of the fixed plate (2); the lifting rod (1) and the central axis of the fixed plate (2) are collinear; The fixed disk (2) has a plurality of clamping plates (3) evenly arranged along its circumference on its side wall; the upper end of all the clamping plates (3) is rotatably connected to the fixed disk (2), and the bottom of all the clamping plates (3) can be rotated to approach or move away from the central axis of the fixed disk (2); each clamping plate (3) has a hook plate (301) connected to the inner side of its bottom, and the angle between the hook plate (301) and the corresponding clamping plate (3) is an acute angle; The space formed between all the clamping plates (3) is able to clamp the bottom of the centrifugal compressor impeller (10).

2. The centrifugal compressor impeller disassembly fixture as described in claim 1, characterized in that, The fixed disk (2) has four clamping plates (3) evenly arranged circumferentially on its side wall.

3. The centrifugal compressor impeller disassembly fixture as described in claim 2, characterized in that, The sidewall of the fixed disk (2) is evenly provided with hinge slots along the circumference, corresponding to the number of clamping plates (3), and each hinge slot is provided with a corresponding hinge shaft (201); all the hinge shafts (201) are horizontally arranged. All the clamping plates (3) described above have hinge holes (302) at their upper ends that match the hinge shaft (201). The clamping plates (3) are connected to the hinge shaft (201) one by one through the hinge holes (302).

4. The centrifugal compressor impeller disassembly fixture as described in claim 3, characterized in that, A cylindrical limiting block (4) is provided at the center of the bottom of the fixed disk (2); The limiting block (4) is collinear with the central axis of the fixed plate (2); the lower part of the outer wall of the limiting block (4) is detachably equipped with a first hanging ring (401) corresponding to the clamping plate (3); a second hanging ring (303) is provided on the lower inner side of all the clamping plates (3); The first hanging ring (401) is rotatably connected to one end of the first tension spring (5) via the first hook (501), and the other end of the first tension spring (5) is rotatably connected to the second hanging ring (303) via the second hook (502); All of the second hooks (502) are located on the same horizontal plane.

5. The centrifugal compressor impeller disassembly fixture as described in claim 4, characterized in that, The limiting block (4) is a hollow structure.

6. The centrifugal compressor impeller disassembly fixture as described in claim 4, characterized in that, The fixed disk (2) has a vertical through hole in the middle; The upper part of the limiting block (4) enters the through hole and can move vertically within the through hole; a first limiting ring (6) is sleeved in the middle of the limiting block (4), and the outer diameter of the first limiting ring (6) is larger than the diameter of the through hole. The bottom of the lifting rod (1) is fixedly connected to one end of the second tension spring (7); the other end of the second tension spring (7) is fixedly connected to the upper part of the limiting block (4).

7. The centrifugal compressor impeller disassembly fixture as described in claim 6, characterized in that, The bottom of the lifting rod (1) is detachably equipped with a connecting block (8); the outer diameter of the connecting block (8) is smaller than the diameter of the through hole, and it is fixedly connected to the top of the second tension spring (7).

8. The centrifugal compressor impeller disassembly fixture as described in claim 7, characterized in that, The fixed plate (2) is provided with a second limiting ring (9) at the top center; the inner diameter of the second limiting ring (9) is equal to the diameter of the through hole, and is arranged collinearly with the central axis of the through hole; The second tension spring (7) enters the second limiting ring (9) and connects to the connecting block (8).

9. The centrifugal compressor impeller disassembly fixture as described in any one of claims 1-8, characterized in that, The hook plate (301) is provided with a protective plate (3011) on its upper end surface.

10. The centrifugal compressor impeller disassembly fixture as described in any one of claims 1-8, characterized in that, The lifting rod (1) is a rubber lifting rod.

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