A device and method for disassembling the split key of a water turbine

Abstract

This invention discloses a device and method for disassembling a split key in a water turbine, including disassembling a main sleeve and a lifting nut, wherein the main sleeve and the lifting nut are threadedly connected; the main sleeve is provided with a left clamping block and a right clamping block, and the main sleeve is provided with two vertical blind holes that are intersecting and communicate with the left clamping port and the right clamping port, respectively, along its axial direction; each vertical blind hole is provided with a vertical screw; the left clamping block and the right clamping block are provided with limiting holes that cooperate with the vertical screw; and the bottom section of the vertical blind hole is provided with a screw thread hole. In this invention, the left and right clamping blocks are engaged in the annular groove of the split key. The left and right clamping blocks are fixed by the vertical screw on the disassembly main sleeve, so that the disassembly main sleeve and the split key are engaged. By rotating the lifting nut, the disassembly main sleeve is lifted, so that the disassembly main sleeve cooperates with the left and right clamping blocks to lift and pull out the split key. No hydraulic equipment is required, and the disassembly efficiency is very high.

Description

Technical Field

[0001] This invention relates to the field of water guide mechanism maintenance technology for water turbines, and in particular to a device and method for disassembling the split key of a water turbine. Background Technology

[0002] The split-half key is an important component in the guide vane and crank arm of a water turbine, serving to transmit torque circumferentially. It is installed with an interference fit, with one half embedded in the shaft head groove of the guide vane and the other half embedded in the corresponding groove of the crank arm. This transmits the operating torque from the crank arm to the guide vane and also helps to fix their relative positions.

[0003] Existing methods for disassembling turbine guide vane arms involve first fitting a dedicated keyed bushing onto the outside of the key, then inserting a U-shaped retaining key into a slot on the bushing to secure it. Next, two jacks are placed below each end of the load-bearing crossarm at the top of the bushing, and two people simultaneously crank the jacks, using symmetrical upward force to pull the key out as a whole. This is illustrated in patent document CN204366883U, which discloses a special tool for disassembling turbine guide vane arms. However, existing methods for disassembling turbine guide vane arms have the following problems: 1. They all require multiple hydraulic devices, increasing disassembly costs; 2. They are generally disassembled using simple tools, which are unstable, making disassembly difficult and inefficient; 3. Existing methods are only applicable to disassembly of key segments of one size, resulting in high costs for disassembling key segments of multiple sizes. Therefore, it is necessary to propose a device and method for disassembling turbine guide vane arms. Summary of the Invention

[0004] To address the aforementioned shortcomings of the prior art, the present invention provides a device and method for disassembling the split key of a water turbine.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: A device for disassembling a turbine split key is provided, comprising a disassembly main sleeve and a lifting nut disposed at the bottom of the disassembly main sleeve. The disassembly main sleeve has a threaded portion on the outer side of its bottom, and the disassembly main sleeve is threadedly connected to the lifting nut. The disassembly main sleeve has symmetrical left and right clamping ports. A left clamping block is disposed in the left clamping port, and a right clamping block is disposed in the right clamping port. The disassembly main sleeve has two vertical blind holes that are intersecting and communicate with the left clamping port and the right clamping port, respectively. A vertical screw is disposed in each of the vertical blind holes. The left and right clamping blocks are provided with limiting holes that cooperate with the vertical screws. The bottom section of the vertical blind holes is provided with screw thread holes that cooperate with the vertical screws.

[0006] Furthermore, the left clamping block has the same structure as the right clamping block. The inner side of the left clamping block is provided with an arc-shaped clamping part, and the arc-shaped clamping part is provided with anti-slip serrations. The outer side of the left clamping block is symmetrically provided with two limiting steps.

[0007] Furthermore, the main sleeve has a set of upper adjusting screws evenly distributed on the upper side of the left clamping block, and the main sleeve has upper screw holes that mate with the upper adjusting screws; the main sleeve has a set of lower adjusting screws evenly distributed on the upper side of the right clamping block, and the main sleeve has lower screw holes that mate with the lower adjusting screws.

[0008] Furthermore, it also includes two rotating rods, and the lifting nut is provided with three sets of rotating holes that cooperate with the rotating rods. Each set of rotating holes includes an upper rotating hole and a lower rotating hole. The three upper rotating holes and the three lower rotating holes are all located at the end line on the outside of the lifting nut.

[0009] Furthermore, it also includes an annular lifting washer, the outer diameter of which is larger than the outer diameter of the lifting nut.

[0010] Furthermore, a U-shaped lifting ring is provided at the top of the disassembled main sleeve, and an installation hole that mates with the U-shaped lifting ring is provided on the disassembled main sleeve.

[0011] Furthermore, chamfers are provided on both the upper and lower sides of the limiting hole.

[0012] Furthermore, both the left and right clamping blocks are provided with several groups, and the distance between the limiting hole on the left clamping block and the clamping side is different in each group.

[0013] Furthermore, the lower side of the arc-shaped clamping part of the left clamping block is provided with a lower chamfer; the upper end surface of the left clamping block is provided with a limit scale value.

[0014] A method for disassembling a turbine split-key disassembly device includes the following steps: S1. Place the lifting shim sleeve on the outside of the split key and adjust the lifting nut to the lowest position; S2. Place the disassembly main sleeve outside the split key and place it on the lifting shim. Adjust the height of the lifting nut appropriately so that the left clamping port and the right clamping port are aligned with the annular groove on the split key. Then, put in the corresponding left clamping block and right clamping block and push the clamping ends of the left clamping block and right clamping block into the annular groove to form a snap-fit. S3. Insert a vertical screw through the vertical blind hole at the top of the disassembled main sleeve. The vertical screw passes through the corresponding left and right clamping blocks, and the bottom of the vertical screw is threaded to the bottom section of the vertical blind hole to fix and limit the left and right clamping blocks. S4. Use a wrench to turn the lifting nut. The lifting nut will turn and lift the disassembled main sleeve. The left and right clamping blocks on the main sleeve will cooperate to clamp and lift the split key. When the wrench is turned, insert two rotating rods at the far end of the lifting nut. Use the two rotating rods in conjunction with the wrench to drive the lifting nut to rotate.

[0015] The beneficial effects of this invention are as follows: In this invention, the disassembly main sleeve and the lifting nut are sleeved on the outside of the split key. The left and right clamping blocks on the disassembly main sleeve are engaged in the annular groove of the split key. The left and right clamping blocks are fixed by the vertical screw on the disassembly main sleeve, so that the disassembly main sleeve and the split key are engaged. Subsequently, by rotating the lifting nut, the disassembly main sleeve is lifted, so that the disassembly main sleeve, in conjunction with the left and right clamping blocks, lifts and pulls out the split key. No hydraulic equipment is required, and the disassembly efficiency is very high.

[0016] The disassembly main sleeve of this invention is equipped with multiple sets of left and right clamping blocks. It also features a set of upper adjusting screws and a set of lower adjusting screws. By replacing different sets of left and right clamping blocks, and considering the different lengths of the limiting holes and clamping sides of each set of clamping blocks, it can accommodate disassembly operations of split keys of different sizes, significantly reducing the disassembly cost of split keys for various sizes of turbines. Simultaneously, the upper and lower adjusting screw sets can form adjustable clamps on the upper and lower sides of the split key, further improving the stability of the disassembly main sleeve when clamping split keys of different sizes.

[0017] The lifting nut of the present invention can be used with a wrench for lifting operations. The lifting nut is also provided with several sets of upper and lower rotating holes. Two rotating rods are inserted into a set of upper and lower rotating holes, which can be used together with the far end of the wrench to drive the lifting nut to rotate, making the disassembly of the split key more efficient and labor-saving.

[0018] Compared with existing methods for disassembling split keys, this invention changes the way force is applied. The original method relied on two jacks on both sides of a special tool to apply force simultaneously, while the current method relies on the rotation of the lifting nut at the bottom of the main sleeve to apply force. This ensures that the direction and point of application of the force remain unchanged, and has the characteristics of stability, reliability, safety and practicality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention in the front view direction; Figure 4Schematic diagram of the left clamping block Figure 1 ; Figure 5 Schematic diagram of the left clamping block Figure 2 ; Figure 6 This is a schematic diagram illustrating the operation of the present invention.

[0020] The symbols for the main components in the diagram are explained below: 1. Disassemble the main sleeve; 101. Left clamping port; 102. Right clamping port; 103. Vertical blind hole; 104. Threaded section; 2. Lifting nut; 21. Upper rotating hole; 22. Lower rotating hole; 3. Left clamping block; 31. Arc-shaped clamping part; 32. Limiting step part; 33. Limiting hole; 34. Limiting scale value; 35. Lower chamfer; 36. Limiting hole chamfer; 4. Right clamping block; 5. Vertical screw; 6. Upper adjusting screw; 7. Lower adjusting screw; 8. Lifting shim; 9. Rotating rod; 10. U-shaped lifting ring; 11. Split key. Detailed Implementation

[0021] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0022] like Figure 1 , 2As shown in Figure 3, the turbine split key disassembly device includes a disassembly main sleeve 1 and a lifting nut 2 located at the bottom of the disassembly main sleeve 1. The inner wall of the disassembly main sleeve 1 is nested with the top of the split key 11, with a 1-2mm gap between the disassembly main sleeve 1 and the split key 11. A threaded part 104 is provided on the outer side of the bottom of the disassembly main sleeve 1. The disassembly main sleeve 1 is threadedly connected to the lifting nut 2. The disassembly main sleeve 1 can be lifted by rotating the lifting nut 2. The main sleeve 1 is provided with symmetrical left clamping port 101 and right clamping port 102. The left clamping port 101 is provided with a left clamping block 3, and the right clamping port 102 is provided with a right clamping block 4. The left clamping block 3 and the right clamping block 4 have the same structure. The main sleeve 1 is provided with two vertical blind holes 103 in the axial direction, which are connected to the left clamping port 101 and intersected with the right clamping port 102. Each vertical blind hole 103 is provided with a vertical screw 5. The left clamping block 3 and the right clamping block 4 are provided with limiting holes 33 that cooperate with the vertical screw 5. The bottom section of the vertical blind hole 103 is provided with a screw thread hole that cooperates with the vertical screw 5. The vertical screw 5 passes through the limiting holes 33 of the left clamping block 3 and the right clamping block 4, which can limit and fix the left clamping block 3 and the right clamping block 4, thereby using the left clamping block 3 and the right clamping block 4 to form a snap-fit ​​on the annular groove of the split key 11.

[0023] A set of upper adjusting screws 6 is evenly distributed on the upper side of the left clamping block 3 of the disassembly main sleeve 1. In this embodiment, there are three locations for each set of upper adjusting screws 6, and the disassembly main sleeve 1 is provided with upper screw holes that mate with the upper adjusting screws 6. A set of lower adjusting screws 7 is evenly distributed on the upper side of the right clamping block 4 of the disassembly main sleeve 1. In this embodiment, there are three locations for each set of lower adjusting screws 7, and the disassembly main sleeve 1 is provided with lower screw holes that mate with the lower adjusting screws 7.

[0024] like Figure 4 and 5 As shown, an arc-shaped clamping part 31 is provided on the inner side of the left clamping block 3. The arc of the arc-shaped clamping part 31 is adapted to the arc of the annular groove of the corresponding half key 11, thereby ensuring the axial clamping effect of the left clamping block 3 and the right clamping block 4 on the half key 11. Anti-slip serrations are provided on the arc-shaped clamping part 31, and two limiting steps 32 are symmetrically provided on the outer side of the left clamping block 3.

[0025] Both the left and right clamping blocks are provided in several groups, and the distance between the limiting hole on the left clamping block and the clamping side is different for each group. Each group of left and right clamping blocks corresponds to a split key 11 of a certain size, so that the turbine split key disassembly device can meet the disassembly requirements of split keys 11 of different sizes.

[0026] The lower side of the arc-shaped clamping part 31 of the left clamping block 3 is provided with a lower chamfer 35. The lower chamfer 35 facilitates the insertion of the arc-shaped clamping part 31 of the left clamping block 3 into the annular groove of the split key 11. The upper end surface of the left clamping block 3 is provided with a limit scale value 34. Through the left clamping block 3, it is easy to observe whether the clamping end of the left clamping block 3 is inserted into the annular groove of the split key 11, thereby facilitating the vertical screw 5 to pass through the limit hole 33 of the left clamping block 3.

[0027] The upper and lower sides of the limiting hole 33 are provided with limiting hole chamfers 36. The limiting hole chamfers 36 are preferably guide right angles. The limiting hole chamfers 36 facilitate the introduction of the vertical screw 5 into the limiting hole 33 of the left clamping block 3, thereby facilitating the vertical screw 5 to pass through the left clamping block 3 and limit and fix the left clamping block 3.

[0028] like Figure 6 As shown, it also includes two rotating rods 9. The lifting nut 2 is provided with three sets of rotating holes that cooperate with the rotating rods 9. Each set of rotating holes includes an upper rotating hole 21 and a lower rotating hole 22. The three upper rotating holes 21 and the three lower rotating holes 22 are all located at the end line on the outside of the lifting nut 2.

[0029] It also includes an annular lifting washer 8, the outer diameter of which is larger than the outer diameter of the lifting nut 2. The lifting washer 8 can be positioned between the lifting nut 2 and the crank arm. The lifting washer 8 can be made of a wear-resistant material, such as stainless steel or hard alloy. The lifting washer 8 provides some protection for the crank arm and better supports the bottom of the lifting nut 2 for stability. During the process of rotating the lifting nut 2, lubricating oil can be applied between the bottom of the lifting nut 2 and the lifting washer 8 to reduce friction and facilitate adjustment of the lifting nut 2.

[0030] A U-shaped lifting ring 10 is provided at the top of the disassembly main sleeve 1, and the disassembly main sleeve 1 is provided with mounting holes that mate with the U-shaped lifting ring 10. The U-shaped lifting ring 10 allows for easy movement of the split-key disassembly device, making its use more convenient.

[0031] A method for disassembling a turbine split-key disassembly device includes the following steps: S1. Place the lifting shims 8 on the outside of the split key 11, and adjust the lifting nut 2 to the lowest position; S2. Place the disassembly main sleeve 1 on the outside of the split key 11 and place it on the lifting shim 8. Adjust the height of the lifting nut 2 appropriately so that the left clamping port 101 and the right clamping port 102 are aligned with the annular groove on the split key 11. Then, put in the corresponding left clamping block 3 and right clamping block 4, and push the clamping ends of the left clamping block 3 and right clamping block 4 into the annular groove to form a snap-fit. S3. Insert the vertical screw 5 into the vertical blind hole 103 at the top of the disassembled main sleeve 1. The vertical screw 5 passes through the corresponding left clamping block 3 and right clamping block 4, and the bottom of the vertical screw 5 is threaded to the bottom section of the vertical blind hole 103 to fix and limit the left clamping block 3 and right clamping block 4. S4, such as Figure 5 As shown, the lifting nut 2 is rotated using a wrench, which lifts and disassembles the main sleeve 1. The left clamping block 3 and the right clamping block 4 on the main sleeve 1 cooperate to clamp and lift the split key 11. When the wrench is rotated, two rotating rods 9 are inserted at the far end of the lifting nut 2. The two rotating rods 9 cooperate with the wrench to drive the lifting nut 2 to rotate.

Claims

1. A device for disassembling a water turbine half key, characterized in that, It includes a disassembly main sleeve (1) and a lifting nut (2) provided at the bottom of the disassembly main sleeve (1). The disassembly main sleeve (1) has a threaded part (104) on the outer side of the bottom. The disassembly main sleeve (1) is threadedly connected to the lifting nut (2). The disassembly main sleeve (1) is provided with symmetrical left clamping port (101) and right clamping port (102). A left clamping block (3) is provided in the left clamping port (101), and a right clamping block (4) is provided in the right clamping port (102). The disassembly main sleeve (1) is provided with two vertical blind holes (103) that are connected to the left clamping port (101) and the right clamping port (102) respectively. A vertical screw (5) is provided in each of the vertical blind holes (103). A limiting hole (33) that cooperates with the vertical screw (5) is provided on the left clamping block (3) and the right clamping block (4). A screw thread hole that cooperates with the vertical screw (5) is provided at the bottom section of the vertical blind hole (103). The left clamping block (3) has the same structure as the right clamping block (4). The left clamping block (3) has an arc-shaped clamping part (31) on its inner side, and anti-slip serrations are provided on the arc-shaped clamping part (31). The left clamping block (3) has two limiting steps (32) symmetrically arranged on its outer side.

2. The hydraulic turbine half key disassembling device according to claim 1, characterized in that, The disassembly main sleeve (1) has a set of upper adjusting screws (6) evenly distributed on the upper side of the left clamping block (3), and the disassembly main sleeve (1) has upper screw holes that cooperate with the upper adjusting screws (6); the disassembly main sleeve (1) has a set of lower adjusting screws (7) evenly distributed on the upper side of the right clamping block (4), and the disassembly main sleeve (1) has lower screw holes that cooperate with the lower adjusting screws (7).

3. The hydraulic turbine half key disassembling device according to claim 2, characterized in that, It also includes two rotating rods (9). The lifting nut (2) is provided with three sets of rotating holes that cooperate with the rotating rods (9). Each set of rotating holes includes an upper rotating hole (21) and a lower rotating hole (22). The three upper rotating holes (21) and the three lower rotating holes (22) are all located at the end line on the outside of the lifting nut (2).

4. The hydraulic turbine half key disassembling device according to claim 3, characterized in that, It also includes an annular lifting washer (8), the outer diameter of which is larger than the outer circle diameter of the lifting nut (2).

5. The hydraulic turbine half key disassembling device according to claim 4, characterized in that, The top of the disassembly main sleeve (1) is provided with a U-shaped lifting ring (10), and the disassembly main sleeve (1) is provided with an installation hole that cooperates with the U-shaped lifting ring (10).

6. The turbine split-key disassembly device according to claim 5, characterized in that, The left clamping block (3) and the right clamping block (4) are each provided with several sets, and the distance between the limiting hole (33) on the left clamping block (3) and the clamping side is different in each set.

7. The turbine split-key disassembly device according to claim 6, characterized in that, The upper and lower sides of the limiting hole (33) are provided with limiting hole chamfers (36); the lower side of the arc-shaped clamping part (31) of the left clamping block (3) is provided with a lower chamfer (35).

8. The turbine split-key disassembly device according to claim 7, characterized in that, The upper end face of the left clamping block (3) is provided with a limit scale value (34).

9. A disassembly method for the turbine split-key disassembly device as described in claim 8, characterized in that, Includes the following steps: S1. Place the lifting shim (8) on the outside of the split key (11) and adjust the lifting nut (2) to the lowest position; S2. Place the disassembly main sleeve (1) on the outside of the split key (11) and place it on the lifting pad (8). Adjust the height of the lifting nut (2) appropriately so that the left clamping port (101) and the right clamping port (102) are aligned with the annular groove on the split key (11). Then, put in the corresponding left clamping block (3) and right clamping block (4) and push the clamping ends of the left clamping block (3) and right clamping block (4) into the annular groove to form a snap-fit. S3. Insert the vertical screw (5) into the vertical blind hole (103) at the top of the disassembled main sleeve (1). The vertical screw (5) passes through the corresponding left clamping block (3) and right clamping block (4). Thread the bottom of the vertical screw (5) to the bottom section of the vertical blind hole (103) to fix and limit the left clamping block (3) and right clamping block (4). S4. Use a wrench to rotate the lifting nut (2). The lifting nut (2) rotates to lift and disassemble the main sleeve (1). The left clamping block (3) and the right clamping block (4) on the main sleeve (1) are disassembled and used to clamp and lift the split key (11). When the wrench is rotated, two rotating rods (9) are inserted at the far end of the lifting nut (2). The two rotating rods (9) are used in conjunction with the wrench to drive the lifting nut (2) to rotate.

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