Impeller dismounting tool for multi-shaft gear type compressor

Abstract

The utility model provides a multi-shaft gear type compressor impeller disassembling tool which comprises a flange base, a plurality of connecting holes are further formed in the circumferential direction of the flange base, the connecting holes are connected with balance correction holes of a multi-shaft gear type compressor impeller, a positioner is connected to the side, away from the impeller, of the flange base, and a threaded hole is formed in the axis position of the positioner. A threaded hole is formed in the flange base, the jacking screw penetrates through the threaded hole, a jacking part is arranged at the end, close to the flange base, of the jacking screw, the multi-shaft gear type compressor is further provided with a coupling bolt, the jacking part is matched with a groove in the end face of the coupling bolt, and the jacking screw is rotated so that the impeller can move in the direction away from a main shaft of the multi-shaft gear type compressor. The defects that in the prior art, a safe and standardized prying mode is not adopted in the dismounting process, the safety of operators is difficult to guarantee, and meanwhile, a non-standardized random prying mode is adopted, and end face teeth of the connecting part are extremely prone to being damaged due to shaking impact generated during prying of a workpiece can be overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-axis gear type compressors, in particular to a multi-axis gear type compressor impeller disassembly tool. Background Art

[0002] Multi-shaft gear compressors are increasingly widely used in industrial applications due to their compact structure and high efficiency, and their market share is also increasing year by year. Its structure is that the prime mover drives the compressor's active large gear, and the large gear drives two or more small gears containing shafts. Due to the different sizes of the small gears, the speed of the impeller is inconsistent. The small gear is meshed with the impeller. The characteristics of this connection are large tightening force and easy disassembly of the impeller. The contact section between the impeller and the volute is often installed in a transition or interference fit. In order to ensure the sealing of the contact section between the impeller and the volute gear shaft and prevent corrosion and oxidation of the drive connection surface due to the medium, an O-ring is often used to place it in the gap between the two components for sealing protection. When the equipment is running hot, the gas in the sealing area of ​​the O-ring expands and overflows during installation, forming a negative pressure area in the area sealed by the O-ring. In this case, conventional lifting and disassembly methods cannot smoothly disengage the meshing structure between the impeller and the end face teeth of the main shaft, especially as large multi-shaft gear compressors are becoming increasingly common equipment, the problem of disassembling large impellers will become more prominent.

[0003] The current disassembly method is to use a hydraulic stretching tool to remove the fastening nut between the impeller and the main shaft, then connect the lifting tool, use a crowbar or other tools to pry the impeller to disengage the impeller from the main shaft, and then lift the impeller to a safe placement area. The unsafe and unstandardized prying method used in the disassembly process makes it difficult to ensure the safety of the operator. At the same time, the non-standardized random prying method is used, and the shaking impact generated by the workpiece during prying can easily cause damage to the end face teeth or pins and positioning surfaces of the connection parts. Utility Model Content

[0004] Therefore, the utility model provides a multi-axis gear compressor impeller disassembly tool, which can overcome the defects of the prior art that the unsafe and standardized prying method is used during the disassembly process, which makes it difficult to ensure the safety of the operator. At the same time, the non-standardized random prying method is used, and the shaking impact generated by the workpiece when prying can easily cause damage to the end face teeth or pins and positioning surfaces of the connecting parts.

[0005] In order to solve the above problems, the utility model provides a multi-axis gear compressor impeller disassembly tool, including a flange base, and a plurality of connecting holes are also arranged in the circumference of the flange base, and the connecting holes are connected to the balance correction holes on the impeller of the multi-axis gear compressor. The flange base is connected to a positioner on the side away from the impeller, and a threaded hole is provided at the axial position of the positioner, and a lifting screw is passed through the threaded hole. The lifting screw has a lifting portion at one end close to the flange base, and the multi-axis gear compressor also has a connecting bolt, and the lifting portion is adapted to the groove on the end face of the connecting bolt. The lifting screw is rotated to move the impeller in the direction of the main axis away from the multi-axis gear compressor.

[0006] In some embodiments, the connecting hole is arranged along the radial direction of the flange base, and the connecting hole is a strip hole with arc-shaped ends. The diameter of the semicircular arc close to the edge of the flange base is R1, and the diameter of the semicircular arc close to the axis of the flange base is R2, and R1>R2.

[0007] In some embodiments, a reinforcing rib plate is further provided at the connection between the flange base and the positioner.

[0008] In some embodiments, the positioner is a hollow structure.

[0009] In some embodiments, a radial cross-section of an end of the lifting screw away from the flange base is a polygonal structure.

[0010] In some embodiments, the lifting portion is a conical structure.

[0011] The utility model provides a multi-axis gear compressor impeller disassembly tool. By adopting connection holes of different diameters, the tool is suitable for the disassembly of impellers of different sizes and diameters of multi-axis gear compressors. It does not produce any uncontrollable impact force on the end teeth or locating pins, and effectively protects the integrity of the end teeth or locating pins during the disassembly process. By rotating the jacking screw, the jacking part presses the connecting bolt. As the jacking screw rotates, the impeller gradually moves away from the main shaft until the impeller is disassembled. A standardized manufacturing process is used to disassemble the impeller of the multi-axis compressor. The disassembly time is short and controllable, which reduces the work intensity, reduces the safety risk of operators, and improves work efficiency. In addition, the tool has a simple structure, light weight, convenient manufacturing and processing, and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the installation structure of the multi-shaft gear compressor impeller disassembly tooling according to an embodiment of the utility model;

[0013] Figure 2This is a schematic structural diagram of a multi-axis gear compressor impeller disassembly tooling according to an embodiment of the utility model.

[0014] The reference numerals are:

[0015] 1. Lifting screw; 2. Positioner; 3. Reinforcement rib plate; 4. Flange base; 5. Limit bolt; 6. Impeller; 7. O-ring; 8. Seal; 9. Bushing; 10. Main shaft; 11. End face gear; 12. Connecting bolt. DETAILED DESCRIPTION

[0016] See also Figure 1 to Figure 2 As shown, according to an embodiment of the utility model, a multi-axis gear compressor impeller disassembly tool is provided, including a flange base 4, the flange base 4 is also provided with a plurality of connection holes in the circumference, the connection holes are connected to the balance correction holes of the multi-axis gear compressor impeller 6, the flange base 4 is connected to the positioner 2 on the side away from the impeller 6, the positioner 2 is provided with a threaded hole at the axial position, the lifting screw 1 is penetrated by the threaded hole, the lifting screw 1 has a lifting part at one end close to the flange base 4, the multi-axis gear compressor is also provided with a connecting bolt 12, the lifting part is adapted to the groove on the end face of the connecting bolt 12, the lifting screw 1 is rotated to make the impeller 6 move in the direction away from the main shaft 10 of the multi-axis gear compressor. Usually, the O-type sealing ring 7 is placed in the gap between the impeller 6, the seal 8 and the main shaft 10. When the machine is running, the temperature rises, and the O-type sealing ring 7 fills the entire gap after thermal expansion, making it difficult to disassemble the impeller 6. The present application rotates the jacking screw to make the jacking part press the connecting bolt, and as the jacking screw rotates, the impeller 6 gradually moves away from the main shaft 10 until the impeller 6 is disassembled. This disassembly method does not generate any uncontrollable impact force on the end face teeth 11 or the positioning pins, and effectively protects the integrity of the end face teeth 11 or the positioning pins during the disassembly process.

[0017] Specifically, the connection hole and the balance correction hole are connected by the limit bolt 5, so that the impeller 6 to be removed is connected to the flange base 4 as a whole, and the flange base 4 drives the impeller to move away from the main shaft 10 until the impeller 6 is removed.

[0018] In a specific embodiment, the connection hole is arranged along the radial direction of the flange base 4, and the connection hole is a strip hole with arc-shaped ends, the semicircular arc diameter close to the edge of the flange base 4 is R1, and the semicircular arc diameter close to the axis of the flange base 4 is R2, and R1>R2. With this arrangement, the tool can be applied to the disassembly of impellers of different sizes and diameters of multi-axis gear compressors. When the impeller is a large impeller, its screw hole diameter is large, so the larger diameter side of the connection hole is used for connection operations. When applied to a small impeller, the smaller diameter side of the connection hole is used for connection operations, which is convenient and quick, and has a wider range of practical applications.

[0019] In a specific embodiment, a reinforcing rib plate 3 is further provided at the connection between the flange base 4 and the positioner 2. The reinforcing rib plate 3 is provided at a right angle formed by the flange base 4 and the positioner 2 to improve the support strength of the positioner 2. Preferably, the reinforcing rib plates 3 are equally spaced along the circumference of the positioner 2 and fixed by welding.

[0020] In a specific embodiment, the positioner 2 is a hollow structure, which realizes a lightweight design of the entire tooling, has a simple structure, is convenient to manufacture, and has a low manufacturing cost.

[0021] In a specific embodiment, the radial cross section of the end of the lifting screw rod 1 away from the flange base 4 is a polygonal structure, preferably a hexagonal structure, which facilitates the rotation of the lifting screw rod 1.

[0022] In a specific embodiment, the lifting portion is a conical structure, which is matched with the end groove of the connecting bolt to achieve accurate positioning and provide a more stable support position.

[0023] Specifically, the lifting screw 1, the positioner 2, and the flange base 4 are concentric with the lifting screw axis after assembly.

[0024] Impeller removal process:

[0025] In the first step, after removing the locking nut of the impeller 6, the tooling provided in the present application is installed, and the flange base 4 with the connecting hole is connected to the balancing correction hole of the impeller 6 by using the limiting bolt 5.

[0026] In the second step, the lifting screw 1 in the tooling is connected to the positioner 2 through a spiral thread and is concentric with the center hole of the impeller connecting bolt 12.

[0027] The third step is to rotate the lifting screw 1 so that the lifting screw 1 applies force to the outer end surface of the connecting bolt 12. The lifting screw 1 is rotated so that the disassembly tool drives the impeller 6 to separate from the gear shaft end face teeth or pins and positioning surfaces through the limit bolt 5. It is in a free state.

[0028] The fourth step is to remove the tooling and then use the lifting tooling to complete the lifting and placement of the impeller.

[0029] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model. The above is only a preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the utility model, and these improvements and variations should also be regarded as the protection scope of the utility model.

Claims

1. A multi-axis gear compressor impeller disassembly tool, It is characterized in that The invention comprises a flange base (4), wherein the flange base (4) is also provided with a plurality of connection holes in the circumference thereof, wherein the connection holes are connected to the balancing correction holes of the impeller (6) of the multi-axis gear compressor, wherein the flange base (4) is connected to a positioner (2) on the side away from the impeller (6), wherein a threaded hole is provided at the axial center of the positioner (2), wherein a lifting screw (1) passes through the threaded hole, wherein the lifting screw (1) has a lifting portion at one end close to the flange base (4), and the multi-axis gear compressor also has a connecting bolt (12), wherein the lifting portion is adapted to be matched with a groove on the end face of the connecting bolt (12), and wherein the lifting screw (1) is rotated to cause the impeller (6) to move in a direction away from the main shaft (10) of the multi-axis gear compressor.

2. The multi-shaft gear compressor impeller disassembly tool according to claim 1, It is characterized in that The connection hole is arranged along the radial direction of the flange base (4); the connection hole is a strip-shaped hole with arc-shaped ends; the diameter of the semicircular arc close to the edge of the flange base (4) is R1, and the diameter of the semicircular arc close to the axis of the flange base (4) is R2, and R1>R2.

3. The multi-shaft gear compressor impeller disassembly tool according to claim 1, It is characterized in that A reinforcing rib plate (3) is also provided at the connection between the flange base (4) and the positioner (2).

4. The multi-shaft gear compressor impeller disassembly tool according to claim 1, It is characterized in that The positioner (2) is a hollow structure.

5. The multi-shaft gear compressor impeller disassembly tool according to claim 1, It is characterized in that The radial cross-section of the end of the lifting screw (1) away from the flange base (4) is a polygonal structure.

6. The multi-shaft gear compressor impeller disassembly tool according to claim 1, It is characterized in that The lifting portion is a conical structure.

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