Auxiliary limiting structure of steam turbine stator blade welding equipment

Abstract

The utility model relates to the technical field of steam turbine stator blade welding, and discloses an auxiliary limiting structure of steam turbine stator blade welding equipment, which comprises a welding machine, a workbench and a stator blade, the multiple stationary blades are annularly distributed on the top of the workbench. The left side and the right side of the top of the workbench are each provided with a clamping mechanism used in cooperation with a stator blade. Adjusting mechanisms used in cooperation with the clamping mechanisms are arranged on the left side and the right side of the workbench correspondingly. Transmission mechanisms used in cooperation with the adjusting mechanisms are arranged on the left side and the right side of the workbench correspondingly. The problems that in the welding machining process of the stator blade, welding equipment cannot conduct auxiliary limiting on the stator blade, a user needs to support and limit the stator blade in the welding process, consequently, the stator blade is prone to deviation in the welding process, and the welding effect of the stator blade is reduced are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam turbine stator blade welding, and particularly relates to an auxiliary limit structure of a steam turbine stator blade welding device. Background Technique

[0002] The laser welding machine for steam turbine stator blades is a device that uses a laser beam as a heat source for welding. It focuses a laser beam with a high energy density on the workpiece, melts the material and combines them together, thereby achieving precise welding of steam turbine stator blades. This welding technology has the advantages of fast welding speed, small heat-affected zone, small deformation, and high welding quality, and is particularly suitable for high-precision and high-requirement industrial applications such as steam turbines. The laser welding machine plays a crucial role in the manufacturing process of steam turbine stator blades. Since the working environment of steam turbine stator blades is extremely harsh, they need to withstand high temperature, high pressure and the impact of high-speed airflows, so there are extremely high requirements for the strength of their materials and welding quality. The laser welding technology can ensure the strength and tightness of the welded joint, and at the same time reduce the stress and deformation generated during the welding process, thereby improving the overall performance and reliability of the blade. In addition, the laser welding machine also has a high level of automation and intelligence. By combining with a computer control system, the laser welding machine can achieve precise welding path planning and parameter setting, ensuring the stability and consistency of the welding process. At the same time, it can also monitor various parameters during the welding process in real time, such as laser power, welding speed, welding depth, etc., and automatically adjust according to the monitoring results to ensure the stability and reliability of the welding quality. During the laser welding process of steam turbine stator blades, some key process parameters and quality control points also need to be noted. For example, the selection of parameters such as the focusing position of the laser beam, welding speed, and welding depth will directly affect the quality and performance of the welded joint. Therefore, in actual operation, reasonable parameter selection and adjustment need to be carried out according to the specific blade material and structural characteristics. At the same time, strict quality inspection and evaluation of the welded joint are also required to ensure that it meets the design requirements and usage requirements. To sum up, the laser welding machine for steam turbine stator blades is a high-precision, high-efficiency and high-quality welding device, which is of great significance for improving the manufacturing level and operating performance of steam turbine blades.

[0003] The laser welding machine for steam turbine stationary blades is mainly used to precisely weld the stationary blades to the disk or other related components. This welding technology can provide high-strength and high-precision welding effects, ensuring good stability and durability of the steam turbine under high-temperature and high-pressure operating environments. By precisely controlling the power, focus, and welding speed of the laser beam, the laser welding machine can achieve fine processing of the welding area, reduce the heat-affected zone, lower deformation and stress, thereby improving the welding quality and efficiency. In addition, laser welding can achieve micron-level precision control to ensure an accurate connection between the stationary blade and the disk, which is crucial for improving the overall performance and efficiency of the steam turbine. The laser welding speed is fast, which can significantly shorten the production cycle and improve production efficiency. This is particularly important for large-scale production or emergency repair tasks. Since the heat input during the laser welding process is concentrated and controllable, it can reduce the heat impact on the surrounding materials, lower welding deformation, and maintain the geometric accuracy of the stationary blade. Laser welding can form fine and uniform welds, improve the strength and sealing performance of the welded joints, and ensure the stable operation of the steam turbine under harsh working conditions. The laser welding machine is usually combined with an automated control system to achieve automation and intelligence of the welding process, reduce the difficulty and labor intensity of manual operation, and improve production safety and stability. During the laser welding process, no filler materials such as welding rods and welding wires are required, reducing material consumption and waste generation. At the same time, laser welding is highly efficient and low in energy consumption, which is conducive to energy conservation, emission reduction, and sustainable development. In summary, the laser welding machine for steam turbine stationary blades plays a significant role in improving welding quality, increasing production efficiency, reducing production costs, and protecting the environment, and is an essential equipment in modern steam turbine manufacturing and maintenance. The problems existing in the above technology are as follows: During the welding process of the stationary blade, there is no component in the welding equipment itself that can assist in limiting the position of the stationary blade, and the user needs to support and limit the position of the stationary blade during welding, resulting in easy deviation of the stationary blade during welding, thus reducing the welding effect of the stationary blade. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides an auxiliary position-limiting structure for a steam turbine stationary blade welding device that can overcome or at least partially solve the above problems.

[0005] The present invention is implemented as follows. An auxiliary position-limiting structure for a steam turbine stationary blade welding device includes a welding machine, a workbench, and stationary blades. The welding machine is located at the top of the workbench and fixedly connected to the top of the workbench. The number of stationary blades is multiple and they are annularly distributed on the top of the workbench. Clamping mechanisms for cooperating with the stationary blades are arranged on both the left and right sides of the top of the workbench. Adjusting mechanisms for cooperating with the clamping mechanisms are arranged on both the left and right sides of the workbench. Transmission mechanisms for cooperating with the adjusting mechanisms are arranged on both the left and right sides of the workbench.

[0006] To improve the welding stability of the stationary blade, preferably, the clamping mechanism includes a clamping block, a connecting plate and a cylindrical rod. The clamping block is located at the top of the workbench. The connecting plate is located on the right side of the clamping block and is fixedly installed with the right side of the clamping block by bolts. The inner cavity of the clamping block fits with the surface of the right stationary blade. The cylindrical rod is located on the right side of the connecting plate and is fixedly connected with the right side of the connecting plate. By setting the clamping mechanism, the clamping block plays a role in clamping and limiting the stationary blade, avoiding the situation that multiple stationary blades cannot be limited during the welding process.

[0007] To improve the mobility convenience of the clamping mechanism, preferably, the adjusting mechanism includes a support block, a lead screw, a slider and a connecting gear. The support block is located on the right side of the workbench and is fixedly connected with the right side of the workbench. The lead screw is located in the inner cavity of the support block and is rotatably connected with the inner wall of the support block. The inner cavity of the slider is threadedly connected with the surface of the lead screw. The left side of the connecting gear is fixedly connected with the right side of the lead screw. The left side of the slider is fixedly connected with the right side of the cylindrical rod by bolts. By setting the adjusting mechanism, the lead screw plays a role in quickly driving the connecting plate and the clamping block to be butt-jointed and inserted with multiple stationary blades through the mutual cooperation of the slider and the cylindrical rod, avoiding the situation that stationary blades of different sizes cannot be butt-jointed and fitted according to the usage requirements.

[0008] To improve the usage convenience of the adjusting mechanism, preferably, the transmission mechanism includes a rotating motor, a transmission gear and a chain. The rotating motor is located on the right side of the workbench. The transmission gear is located on the right side of the rotating motor and is fixedly connected to the output end of the rotating motor. The front side of the inner cavity of the chain is meshed with the surface of the transmission gear. The rear side of the inner cavity of the chain is meshed with the surface of the connecting gear. By setting the transmission mechanism, the rotating motor plays a role in quickly driving the adjusting mechanism to be used through the mutual cooperation of the transmission gear and the chain.

[0009] To improve the moving stability of the clamping mechanism, preferably, both the front side and the rear side of the bottom of the connecting plate are fixedly connected with moving blocks. The inner cavity of the moving block is movably connected with a limiting block. The bottom of the limiting block is fixedly connected with the top of the workbench. By setting the moving block and the limiting block, the limiting block plays a role in assisting the connecting plate and the clamping block to move stably through the mutual cooperation with the moving block, avoiding the situation that the connecting plate and the clamping block shake during the moving process.

[0010] To improve the connection stability between the stationary blade and the clamping block, preferably, clamping grooves are provided at the opposite ends of the two clamping blocks. The number of the clamping grooves is multiple and they are annularly distributed in the inner cavities of the two clamping blocks. By providing the clamping grooves, during the docking process of the clamping block and the stationary blade, one side of the stationary blade is inserted into the inner cavity of the corresponding clamping groove, so as to further improve the connection stability between the stationary blade and the clamping block and avoid the situation of the stationary blade falling off.

[0011] To improve the installation convenience of the rotating motor, preferably, a fixing plate is fixedly connected to the bottom of the rotating motor, and the left side of the fixing plate and the right side of the workbench are fixedly installed through bolts. By providing the fixing plate, the fixing plate plays a role of facilitating the user to quickly install and fix the rotating motor.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] In the present utility model, by providing a welding machine, a workbench, a stationary blade, a clamping mechanism, an adjusting mechanism and a transmission mechanism, the stationary blade is placed on the top of the workbench, and then the rotating motor is started. The rotating motor will drive the transmission gear to rotate through its output end. During the rotation of the transmission gear, the connecting gear will be driven to rotate through the chain. During the rotation of the connecting gear, the lead screw will be driven to rotate. During the rotation of the lead screw, the slider will be driven to move through the threaded connection with the slider. During the movement of the slider, the connecting plate will be driven to move in the same direction through the cylindrical rod. During the movement of the connecting plate, the clamping block will be driven to dock with the stationary blade. After the clamping block moves to fit the surface of the stationary blade, the stationary blade can be inserted and fitted into the inner cavity of the clamping groove. After the docking is completed, when the rotating motor is turned off, the transmission gear, the chain and the connecting gear will lose the rotation torque. After the connecting gear loses the rotation torque, the clamping block can be quickly positioned through the threaded connection between the lead screw and the slider, thereby further improving the effect of stably clamping multiple stationary blades. Description of the Drawings

[0014] Figure 1 is a three-dimensional structure diagram provided by an embodiment of the present utility model;

[0015] Figure 2 is an adjustment schematic diagram of the clamping mechanism provided by an embodiment of the present utility model;

[0016] Figure 3 is a docking schematic diagram of the welding machine and the stationary blade provided by an embodiment of the present utility model;

[0017] Figure 4 is a three-dimensional schematic diagram of the clamping mechanism provided by an embodiment of the present utility model.

[0018] In the figure: 1, welding machine; 2, workbench; 3, stationary blade; 4, clamping mechanism; 5, adjusting mechanism; 6, transmission mechanism; 401, clamping block; 402, connecting plate; 403, cylindrical rod; 501, support block; 502, lead screw; 503, slider; 504, connecting gear; 601, rotating motor; 602, transmission gear; 603, chain; 7, moving block; 8, limiting block; 9, clamping groove; 10, fixing plate. Detailed implementation manners

[0019] In order to further understand the inventive concept, features and effects of the present utility model, the following embodiments are given and described in detail in conjunction with the accompanying drawings.

[0020] The structure of the present utility model will be described in detail below with reference to the accompanying drawings.

[0021] As Figures 1 to 4As shown in the figure, an auxiliary limiting structure of a steam turbine stationary blade welding device provided by an embodiment of the present utility model includes a welding machine 1, a workbench 2, and stationary blades 3. The welding machine 1 is located at the top of the workbench 2 and is fixedly connected to the top of the workbench 2. The number of stationary blades 3 is multiple and they are annularly distributed on the top of the workbench 2. Clamping mechanisms 4 for cooperating with the stationary blades 3 are arranged on both the left and right sides of the top of the workbench 2. Adjusting mechanisms 5 for cooperating with the clamping mechanisms 4 are arranged on both the left and right sides of the workbench 2. Transmission mechanisms 6 for cooperating with the adjusting mechanisms 5 are arranged on both the left and right sides of the workbench 2. The clamping mechanism 4 includes a clamping block 401, a connecting plate 402, and a cylindrical rod 403. The clamping block 401 is located on the top of the workbench 2. The connecting plate 402 is located on the right side of the clamping block 401 and is fixedly installed on the right side of the clamping block 401 through bolts. The inner cavity of the clamping block 401 fits the surface of the right stationary blade 3. The cylindrical rod 403 is located on the right side of the connecting plate 402 and is fixedly connected to the right side of the connecting plate 402. By setting the clamping mechanism 4, the clamping block 401 plays a role in clamping and limiting the stationary blade 3, avoiding the situation that the multiple stationary blades 3 cannot be limited during the welding process. The adjusting mechanism 5 includes a support block 501, a lead screw 502, a slider 503, and a connecting gear 504. The support block 501 is located on the right side of the workbench 2 and is fixedly connected to the right side of the workbench 2. The lead screw 502 is located in the inner cavity of the support block 501 and is rotatably connected to the inner wall of the support block 501. The inner cavity of the slider 503 is threadedly connected to the surface of the lead screw 502. The left side of the connecting gear 504 is fixedly connected to the right side of the lead screw 502. The left side of the slider 503 is fixedly connected to the right side of the cylindrical rod 403 through bolts. By setting the adjusting mechanism 5, the lead screw 502 plays a role in quickly driving the connecting plate 402 and the clamping block 401 to be butt-jointed and inserted with the multiple stationary blades 3 through the mutual cooperation of the slider 503 and the cylindrical rod 403, avoiding the situation that the stationary blades 3 of different sizes cannot be butt-jointed and fitted according to the usage requirements. The transmission mechanism 6 includes a rotating motor 601, a transmission gear 602, and a chain 603. The rotating motor 601 is located on the right side of the workbench 2. The transmission gear 602 is located on the right side of the rotating motor 601 and is fixedly connected to the output end of the rotating motor 601. The front side of the inner cavity of the chain 603 is meshed with the surface of the transmission gear 602. The rear side of the inner cavity of the chain 603 is meshed with the surface of the connecting gear 504. By setting the transmission mechanism 6, the rotating motor 601 plays a role in quickly driving the adjusting mechanism 5 to be used through the mutual cooperation of the transmission gear 602 and the chain 603. Moving blocks 7 are fixedly connected to both the front and rear sides of the bottom of the connecting plate 402. A limiting block 8 is movably connected to the inner cavity of the moving block 7. The bottom of the limiting block 8 is fixedly connected to the top of the workbench 2. By setting the moving block 7 and the limiting block 8, the limiting block 8 plays a role in assisting the connecting plate 402 and the clamping block 401 to move stably through the mutual cooperation with the moving block 7.The situation where the connecting plate 402 and the clamping block 401 shake during movement is avoided. Clamping grooves 9 are provided at the relative ends of the two clamping blocks 401. The number of clamping grooves 9 is multiple and they are annularly distributed in the inner cavities of the two clamping blocks 401. By providing the clamping grooves 9, during the docking process of the clamping block 401 and the stationary blade 3, one side of the stationary blade 3 is inserted into the inner cavity of the corresponding clamping groove 9, so as to further improve the connection stability between the stationary blade 3 and the clamping block 401 and avoid the situation where the stationary blade 3 falls off. The bottom of the rotary motor 601 is fixedly connected with a fixing plate 10. The left side of the fixing plate 10 and the right side of the workbench 2 are fixedly installed by bolts. By providing the fixing plate 10, the fixing plate 10 plays a role of facilitating the user to quickly install and fix the rotary motor 601.,

[0022] The working principle of the present utility model:

[0023] During use, place the stationary blade 3 on the top of the workbench 2, and then start the rotary motor 601. The rotary motor 601 will drive the transmission gear 602 to rotate through its output end. During the rotation of the transmission gear 602, the connecting gear 504 will be driven to rotate through the chain 603. During the rotation of the connecting gear 504, the lead screw 502 will be driven to rotate. During the rotation of the lead screw 502, the slider 503 will be driven to move through the threaded connection with the slider 503. During the movement of the slider 503, the connecting plate 402 will be driven to move in the same direction through the cylindrical rod 403. During the movement of the connecting plate 402, the clamping block 401 will be driven to dock with the stationary blade 3. After the clamping block 401 moves to fit the surface of the stationary blade 3, the stationary blade 3 can be inserted and fitted into the inner cavity of the clamping groove 9. After the docking is completed, turn off the rotary motor 601, and the transmission gear 602, the chain 603 and the connecting gear 504 will lose the rotational torque. After the connecting gear 504 loses the rotational torque, the clamping block 401 can be quickly positioned through the threaded connection between the lead screw 502 and the slider 503, thereby further improving the effect of stably clamping multiple stationary blades 3.

[0024] For the specific model specifications of the welding machine 1, the workbench 2 and the rotary motor 601 proposed in this application, they need to be selected and determined according to the actual specifications of the device. The specific selection calculation method, the circuit connection method and its control method all adopt the existing technologies in the field, so they will not be elaborated in detail.

[0025] It should be noted that in this text, relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0026] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of this patent, within the scope of the technical solution of the present utility model.

Claims

1. An auxiliary limiting structure of a steam turbine stationary blade welding device, comprising a welding machine (1), a workbench (2) and a stationary blade (3), characterized in that: The welding machine (1) is located on the top of the workbench (2) and is fixedly connected to the top of the workbench (2); the stationary blades (3) are multiple in number and are distributed in an annular shape on the top of the workbench (2); The left and right sides of the top of the workbench (2) are both provided with clamping mechanisms (4) for use with the stationary blades (3); The left and right sides of the workbench (2) are both provided with adjustment mechanisms (5) used in conjunction with the clamping mechanism (4); Transmission mechanisms (6) for use with the adjustment mechanism (5) are provided on both the left and right sides of the workbench (2).

2. The auxiliary limiting structure of the steam turbine stationary blade welding equipment according to claim 1, characterized in that: The clamping mechanism (4) comprises a clamping block (401), a connecting plate (402) and a cylindrical rod (403); the clamping block (401) is located on the top of the workbench (2); the connecting plate (402) is located on the right side of the clamping block (401) and is fixedly mounted to the right side of the clamping block (401) by bolts; the inner cavity of the clamping block (401) is in contact with the surface of the right stationary blade (3); and the cylindrical rod (403) is located on the right side of the connecting plate (402) and is fixedly connected to the right side of the connecting plate (402).

3. The auxiliary limiting structure of the steam turbine stationary blade welding equipment according to claim 2, characterized in that: The adjusting mechanism (5) comprises a supporting block (501), a screw rod (502), a slider (503) and a connecting gear (504); the supporting block (501) is located on the right side of the workbench (2) and is fixedly connected to the right side of the workbench (2); the screw rod (502) is located in the inner cavity of the supporting block (501) and is rotatably connected to the inner wall of the supporting block (501); the inner cavity of the slider (503) is connected to the surface of the screw rod (502) by means of threads; the left side of the connecting gear (504) is fixedly connected to the right side of the screw rod (502); and the left side of the slider (503) is fixedly connected to the right side of the cylindrical rod (403) by means of bolts.

4. The auxiliary limiting structure of the steam turbine stationary blade welding equipment according to claim 3, characterized in that: The transmission mechanism (6) comprises a rotating motor (601), a transmission gear (602) and a chain (603); the rotating motor (601) is located on the right side of the workbench (2); the transmission gear (602) is located on the right side of the rotating motor (601) and is fixedly connected to the output end of the rotating motor (601); the front side of the inner cavity of the chain (603) is meshedly connected to the surface of the transmission gear (602); and the rear side of the inner cavity of the chain (603) is meshedly connected to the surface of the connecting gear (504).

5. The auxiliary limiting structure of the steam turbine stator blade welding equipment according to claim 2, characterized in that: The front and rear sides of the bottom of the connecting plate (402) are fixedly connected to a moving block (7), the inner cavity of the moving block (7) is movably connected to a limiting block (8), and the bottom of the limiting block (8) is fixedly connected to the top of the workbench (2).

6. The auxiliary limiting structure of the steam turbine stator blade welding equipment according to claim 2, characterized in that: A clamping groove (9) is provided at the opposite ends of the two clamping blocks (401), and the clamping grooves (9) are multiple in number and are distributed in an annular manner in the inner cavities of the two clamping blocks (401).

7. The auxiliary limiting structure of the steam turbine stationary blade welding equipment according to claim 4, characterized in that: A fixing plate (10) is fixedly connected to the bottom of the rotating motor (601), and the left side of the fixing plate (10) is fixedly mounted to the right side of the workbench (2) by means of bolts.

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