Mounting tool for additionally mounting dynamic balance block on low-pressure rotor of steam turbine

Abstract

The utility model relates to the technical field of counterbalance mounting tools, and discloses a mounting tool for mounting a dynamic counterbalance on a low-pressure rotor of a steam turbine, which comprises a mounting tool component, the mounting tool component comprises a rotating handle and a main rod structure arranged on one side of the rotating handle, and one end, far away from the rotating handle, of the main rod structure is connected with a connecting rod. A threaded rod is arranged on one side of the connecting rod, a connecting structure is arranged on the outer side of the main rod structure, a protective cover shell is arranged on one side of the connecting structure, the balance block can be placed into a dovetail groove of a low-pressure rotor additionally provided with a dynamic balance block through the installation tool assembly, and then the four corners of the dynamic balance block and the low-pressure rotor are fixed in a punching and riveting mode through a chisel. After being fixed, the installation tool assembly is screwed out reversely, the fastening screw of the balance block is suspended on the balance block through the installation tool assembly again, the dynamic balance block is additionally installed, the dynamic balance block is conveniently additionally installed through the arranged protection cover shell, steam can be isolated, and use is safe.

Description

Technical Field

[0001] The utility model relates to the technical field of tools for installing dynamic balancing blocks, in particular to a tool for installing dynamic balancing blocks on a low-pressure rotor of a steam turbine. Background Art

[0002] During the operation of the steam turbine rotor, it is often affected by unbalanced forces. In order to ensure the safe operation of the unit, a high-speed dynamic balancing test must be carried out before the rotor leaves the factory. During the design process, balancing holes are often reserved for dynamic balancing in the factory, and dovetail grooves are left at both ends of the low-pressure rotor to facilitate the installation of dynamic balancing blocks. After dynamic balancing in the factory, the rotor imbalance can be guaranteed to be within a certain range.

[0003] Dovetail-shaped balancing weights are often used for in-plant rotor balancing. During high-speed balancing in the factory, the weights can be inserted along the dovetail grooves, making installation relatively easy. However, due to the relatively low weight of a single dovetail-shaped balancing weight, multiple weights are typically required, and the weights require set screws, which increases risk. Furthermore, because tools are not readily available for installation, elevated rotor temperatures prevent personnel from approaching, extending installation time.

[0004] Therefore, we propose an installation tool for installing a dynamic balancing block on a low-pressure rotor of a steam turbine in order to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide an installation tool for installing dynamic balancing blocks on a low-pressure rotor of a steam turbine, so as to solve the problem proposed in the above-mentioned background technology that there is no installation tool when installing the dynamic balancing blocks, and if the rotor temperature is high, people should not get close, which prolongs the installation time of the balancing blocks.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an installation tool for adding a dynamic balancing block to a low-pressure rotor of a steam turbine, comprising an installation tool assembly, the installation tool assembly being used to install the dynamic balancing block, the installation tool assembly comprising a handle and a main rod structure arranged on one side of the handle, the handle being used to be held and rotated, a connecting rod being connected to one end of the main rod structure away from the handle, a threaded rod being provided on one side of the connecting rod, a threaded portion being provided on the outer side of the threaded rod, a threaded hole being provided in the middle of the dynamic balancing block, the dynamic balancing block being able to be connected and fixed to the main rod structure through the threaded portion, a connecting structure being provided on the outer side of the main rod structure, a protective cover being provided on one side of the connecting structure, the dynamic balancing block being able to be connected to the main rod structure by means of the provided threaded portion, the installation tool assembly being able to place the balancing block into the dovetail groove of the low-pressure rotor for adding the dynamic balancing block, the block being rotated to the horizontal position during the placement process, entering the dovetail groove and then being rotated to the vertical position again, and then the four corners of the dynamic balancing block being fixed to the low-pressure rotor by punching and riveting with a chisel, and the installation tool assembly being rotated out in the opposite direction after being fixed.

[0007] Preferably, the protective cover is a semicircular structure and is made of a transparent material, and is used to isolate part of the steam.

[0008] Preferably, the connecting structure includes a sleeve rod and a connecting column arranged on one side of the sleeve rod, and two groups of sleeve rods are provided. A spring is provided on one side of the connecting column, and the other end of the spring is connected to another group of sleeve rods through the connecting column. The protective cover is at the lower end of one group of sleeve rods, and a mounting block is provided on one side of the sleeve rod. A stop pin is provided on the mounting block, and the sleeve rod fixes the protective cover through the spring, the mounting block and the mounting block.

[0009] Preferably, the main rod structure includes a fixed main rod and a central limiting rod arranged inside the fixed main rod. The surface of the fixed main rod is provided with screws for fixing. A movable main rod is slidingly connected inside the fixed main rod. The surface of the movable main rod is evenly distributed with mounting holes. The movable main rod is inserted into the fixed main rod and fixed by using the screws and the mounting holes.

[0010] Preferably, a limiting groove is provided inside the movable main rod, and the limiting groove is used to accommodate the central limiting rod. When the movable main rod moves, the central limiting rod slides in the limiting groove.

[0011] Preferably, a wear-resistant layer is evenly distributed on the inner wall of the fixed main rod, and the wear-resistant layer can play a wear-resistant role.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. Through the provided installation tool assembly, the balancing block can be placed into the dovetail groove of the dynamic balancing block installed on the low-pressure rotor. During the placement process, it should be rotated to the horizontal position, enter the dovetail groove and rotated to the vertical position again, and then the four corners of the dynamic balancing block are fixed to the low-pressure rotor by riveting with a chisel. After fixing, the installation tool assembly is rotated out in the opposite direction. Similarly, the fastening screws of the balancing block are suspended on the balancing block again using the installation tool assembly to realize the installation of the dynamic balancing block. The provided protective cover is convenient for the installation of the dynamic balancing block, and can isolate steam, which is safer to use. In addition, when the dynamic balancing block or the fastening screws loosen and fall off, the protective cover can effectively block it to prevent it from falling directly into the low-pressure cylinder and damaging components.

[0014] 2. By setting up the main rod structure, the movable main rod is pulled out of the fixed main rod and fixed with screws and mounting holes, so that the overall use length of the main rod structure can be adjusted and the range of use is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the protective cover structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the main rod structure of the present utility model.

[0019] In the figure: 1. Installation tool assembly; 11. Turning handle; 12. Main rod structure; 121. Fixed main rod; 1211. Wear-resistant layer; 122. Center limit rod; 123. Screw; 124. Movable main rod; 125. Limiting groove; 126. Mounting hole; 13. Connecting rod; 14. Threaded rod; 141. Threaded part; 15. Connecting structure; 151. Sleeve rod; 152. Connecting column; 153. Spring; 154. Mounting block; 155. Stop pin; 16. Protective cover. DETAILED DESCRIPTION

[0020] The following will be combined with the 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 without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1 、 Figure 2 and Figure 3 , an installation tool for adding a dynamic balancing block to a low-pressure rotor of a steam turbine, comprising an installation tool assembly 1, the installation tool assembly 1 is used to install the dynamic balancing block, the installation tool assembly 1 comprises a turning handle 11 and a main rod structure 12 arranged on one side of the turning handle 11, the turning handle 11 is used to be held and can be rotated, the main rod structure 12 is connected to a connecting rod 13 at one end away from the turning handle 11, a threaded rod 14 is provided on one side of the connecting rod 13, a threaded portion 141 is provided on the outer side of the threaded rod 14, a threaded hole is provided in the middle of the dynamic balancing block, the dynamic balancing block can be connected and fixed to the main rod structure 12 through the threaded portion 141, a connecting structure 15 is provided on the outer side of the main rod structure 12, a protective cover 16 is provided on one side of the connecting structure 15, the threaded portion 141 is provided to enable the dynamic balancing block to be connected to the main rod structure 12 To make the connection, the balancing block can be placed into the dovetail groove of the dynamic balancing block installed on the low-pressure rotor using the installation tool assembly 1. During the placement process, it should be rotated to the horizontal position to be placed, and then rotated to the vertical position again after entering the dovetail groove. Then, the four corners of the dynamic balancing block are riveted to the low-pressure rotor with a chisel. After fixing, the installation tool assembly 1 is unscrewed in the opposite direction, and the fastening screws of the balancing block are suspended on the balancing block again using the installation tool assembly 1. The fastening screws are used to support the balancing block against the bottom of the dovetail groove of the low-pressure rotor to achieve the installation of the dynamic balancing block. The protective cover 16 is used to facilitate the installation of the dynamic balancing block, and can isolate steam, making it safer to use. When the dynamic balancing block or the fastening screws loosen and fall off, the protective cover 16 can effectively block them to prevent them from falling directly into the low-pressure cylinder and damaging components.

[0022] The protective cover 16 is a semicircular structure and is made of a transparent material. The protective cover 16 is used to isolate part of the steam and can facilitate the installation of dynamic balancing blocks.

[0023] The connecting structure 15 includes a sleeve rod 151 and a connecting column 152 arranged on one side of the sleeve rod 151. There are two groups of sleeve rods 151. A spring 153 is provided on one side of the connecting column 152. The other end of the spring 153 is connected to another group of sleeve rods 151 through the connecting column 152. The protective cover shell 16 is at the lower end of one group of sleeve rods 151. A mounting block 154 is provided on one side of the sleeve rod 151. A stop pin 155 is provided on the mounting block 154. The sleeve rod 151 fixes the protective cover shell 16 through the spring 153, the mounting block 154 and the mounting block 154.

[0024] In this embodiment: the provided threaded portion 141 can be used to connect the dynamic balancing block to the main rod structure 12, and the installation tool assembly 1 can be used to place the balancing block into the dovetail groove of the low-pressure rotor for installing the dynamic balancing block. During the placement process, it should be rotated to be placed horizontally, and then rotated to the vertical position again after entering the dovetail groove. Then, the four corners of the dynamic balancing block are riveted to the low-pressure rotor by a chisel. After fixing, the installation tool assembly 1 is unscrewed in the opposite direction, and the fastening screw of the balancing block is suspended on the balancing block again by the installation tool assembly 1. The fastening screw is used to support the balancing block against the bottom of the dovetail groove of the low-pressure rotor to achieve the installation of the dynamic balancing block. The provided protective cover 16 is used to facilitate the installation of the dynamic balancing block, and can isolate steam, making it safer to use. When the dynamic balancing block or the fastening screw loosens and falls off, the protective cover 16 can effectively block it to prevent it from falling directly into the low-pressure cylinder and damaging components.

[0025] Example 2: This example is an improvement made on the basis of Example 1. For details, please refer to Figure 3 and Figure 4 The main rod structure 12 includes a fixed main rod 121 and a central limiting rod 122 arranged inside the fixed main rod 121. A screw 123 for fixing is provided on the surface of the fixed main rod 121. A movable main rod 124 is slidably connected inside the fixed main rod 121. The surface of the movable main rod 124 is evenly distributed with mounting holes 126. The movable main rod 124 is inserted into the fixed main rod 121 and fixed by using the screw 123 and the mounting hole 126 to achieve fixation between the fixed main rod 121 and the movable main rod 124. Therefore, the overall use length of the main rod structure 12 can be adjusted, effectively improving the scope of use.

[0026] A limiting groove 125 is provided inside the movable main rod 124 , and the limiting groove 125 is used to accommodate the central limiting rod 122 . When the movable main rod 124 moves, the central limiting rod 122 slides in the limiting groove 125 , thereby effectively increasing stability.

[0027] A wear-resistant layer 1211 is evenly distributed on the inner wall of the fixed main rod 121 . The wear-resistant layer 1211 can play a wear-resistant role and reduce the wear between the fixed main rod 121 and the movable main rod 124 .

[0028] In this embodiment: the movable main rod 124 is inserted into the fixed main rod 121, and the central limiting rod 122 is placed in the limiting groove 125. When the movable main rod 124 moves, the central limiting rod 122 slides in the limiting groove 125, effectively increasing stability. After moving, it can be fixed with screws 123 to achieve fixation between the fixed main rod 121 and the movable main rod 124, so that the overall use length of the main rod structure 12 can be adjusted, effectively improving the range of use.

[0029] Working principle: The threaded portion 141 is used to connect the dynamic balancing block to the main rod structure 12. The balancing block can be placed into the dovetail groove of the low-pressure rotor using the installation tool assembly 1. During the placement process, it should be rotated to the horizontal position, and then rotated to the vertical position again after entering the dovetail groove. Then, the four corners of the dynamic balancing block are fixed to the low-pressure rotor by riveting with a chisel. After fixing, the installation tool assembly 1 is rotated out in the opposite direction, and the fastening screws of the balancing block are hung on the balancing block again using the installation tool assembly 1, and then the fastening screws are fixed to the balancing block. Through the fastening screw, the balancing block is pressed against the bottom of the dovetail groove of the low-pressure rotor, thereby realizing the installation of the dynamic balancing block, and the protective cover 16 is used to facilitate the installation of the dynamic balancing block, and can isolate the steam. The movable main rod 124 is inserted into the fixed main rod 121, and the center limit rod 122 is placed in the limit groove 125. When the movable main rod 124 moves, it can be fixed with the screw 123 to realize the fixation between the fixed main rod 121 and the movable main rod 124, so that the overall usable length of the main rod structure 12 can be adjusted.

[0030] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An installation tool for installing a dynamic balancing block on a low-pressure rotor of a steam turbine, comprising an installation tool assembly (1), the installation tool assembly (1) being used for installing the dynamic balancing block, and characterized in that: The installation tool assembly (1) includes a turning handle (11) and a main rod structure (12) arranged on one side of the turning handle (11); the main rod structure (12) is connected to a connecting rod (13) at one end away from the turning handle (11); a threaded rod (14) is arranged on one side of the connecting rod (13); a threaded portion (141) is provided on the outer side of the threaded rod (14); a threaded hole is provided in the middle of the dynamic balancing block; the dynamic balancing block can be connected and fixed to the main rod structure (12) through the threaded portion (141); a connecting structure (15) is provided on the outer side of the main rod structure (12); a protective cover (16) is provided on one side of the connecting structure (15); the dynamic balancing block can be connected to the main rod structure (12) by using the threaded portion (141); and the balancing block can be placed in the dovetail groove of the low-pressure rotor for installing the dynamic balancing block by using the installation tool assembly (1).

2. The installation tool for adding dynamic balancing weights to a low-pressure rotor of a steam turbine according to claim 1, characterized in that: The protective cover shell (16) has a semicircular structure, and is a component made of a transparent material.

3. The installation tool for adding dynamic balancing weights to a low-pressure rotor of a steam turbine according to claim 2, characterized in that: The connecting structure (15) comprises a sleeve rod (151) and a connecting column (152) arranged on one side of the sleeve rod (151). Two groups of sleeve rods (151) are provided. A spring (153) is provided on one side of the connecting column (152). The other end of the spring (153) is connected to another group of sleeve rods (151) through the connecting column (152). The protective cover (16) is located at the lower end of one group of sleeve rods (151). A mounting block (154) is provided on one side of the sleeve rod (151). A stop pin (155) is provided on the mounting block (154).

4. The installation tool for adding dynamic balancing weights to a low-pressure rotor of a steam turbine according to claim 3, characterized in that: The main rod structure (12) comprises a fixed main rod (121) and a central limiting rod (122) arranged inside the fixed main rod (121); a screw (123) for fixing is provided on the surface of the fixed main rod (121); a movable main rod (124) is slidably connected inside the fixed main rod (121); and mounting holes (126) are evenly distributed on the surface of the movable main rod (124).

5. The installation tool for adding dynamic balancing weights to a low-pressure rotor of a steam turbine according to claim 4, characterized in that: A limiting groove (125) is provided inside the movable main rod (124), and the limiting groove (125) is used to accommodate the central limiting rod (122).

6. The installation tool for adding dynamic balancing weights to a low-pressure rotor of a steam turbine according to claim 5, characterized in that: A wear-resistant layer (1211) is evenly distributed on the inner wall of the fixed main rod (121), and the wear-resistant layer (1211) can play a role in wear resistance.

Images