Supporting device for water turbine blade welding

Abstract

The invention relates to the technical field of water turbine blade welding, in particular to a supporting device for water turbine blade welding. Comprising a base plate, a water turbine body clamping tool and a plurality of water turbine blade supporting tools, and the water turbine blade supporting tools are annularly distributed with the water turbine body clamping tool as the circle center. Each water turbine blade supporting tool comprises a supporting column set used for supporting one end of a water turbine blade and a supporting frame used for supporting the other end of the water turbine blade, and each supporting column set is provided with an inner supporting column and an outer supporting column which are sequentially distributed outwards from the water turbine body clamping tool. The chassis is provided with inner sliding grooves in sliding fit with the inner supporting columns, outer sliding grooves in sliding fit with the outer supporting columns, a first driving mechanism used for driving all the inner supporting columns to slide synchronously, and a second driving mechanism used for driving all the outer supporting columns to slide synchronously. The device can be quickly adjusted to adapt to and support welding of water turbines of different specifications.

Description

Technical Field

[0001] The present invention relates to the technical field of water turbine blade welding, and more specifically, it is a support device for water turbine blade welding. Background Art

[0002] As a core device for clean energy power generation, the manufacturing precision of the blades of a water turbine directly affects the efficiency and stability of the water turbine. Welding is a key process in the manufacturing of water turbine blades, and its quality directly determines the performance and service life of the blades.

[0003] Traditional water turbine blade welding mainly adopts the methods of manual hand-held welding or simple fixture-assisted welding, which have problems such as low welding precision, low processing efficiency, high labor requirements, and poor welding consistency. In recent years, with the rapid development of robot technology and automatic control technology, robot welding technology has been initially applied in the field of water turbine blade manufacturing. However, existing robot welding systems usually use general-purpose welding fixtures, which are difficult to meet the support requirements of the complex curved surface structure of water turbine blades. In the prior art, Zhejiang Yongyu Machinery Manufacturing Co., Ltd. disclosed a clamping fixture for water turbine blade welding in patent CN221159140U. By using clamping blocks to cooperate with clamping the water turbine blade, it is convenient for welding. However, this solution has a complex process in the process of assembling the blade, and it is necessary to accurately align the blade with the fixture before assembly, which affects the clamping efficiency. Moreover, the structure of the water turbine blade is complex, and it is necessary to adjust the angle between the blade and the body according to different welding positions and process requirements. The above fixture is difficult to achieve precise control with the same frequency and amplitude. Summary of the Invention

[0004] The present invention aims to provide a support device for water turbine blade welding, which can be quickly adjusted to adapt to and support water turbine welding of different specifications.

[0005] To solve the above technical problems, the specific solution adopted by the present invention is as follows: A support device for water turbine blade welding includes a chassis, a water turbine body clamping fixture, and a water turbine blade support fixture arranged on the chassis. The number of water turbine blade support fixtures is multiple and is annularly distributed with the water turbine body clamping fixture as the center. Any water turbine blade support fixture includes a support column group for supporting one end of the water turbine blade and a support frame for supporting the other end of the water turbine blade. The support column group has an inner support column and an outer support column that are sequentially distributed outward from the water turbine body clamping fixture. The inner support column and the outer support column are respectively used to support both sides of the end of the water turbine blade. On the chassis, there are provided an inner sliding groove for the inner support column to slide in cooperation and an outer sliding groove for the outer support column to slide in cooperation, as well as a first driving mechanism for driving all the inner support columns to slide synchronously along the corresponding inner sliding groove and a second driving mechanism for driving all the outer support columns to slide synchronously along the corresponding outer sliding groove.

[0006] Preferably, both the inner sliding groove and the outer sliding groove are arc-shaped, and the centers of the inner sliding groove and the outer sliding groove coincide with the clamping tool for the water turbine body.

[0007] Preferably, the first driving mechanism includes a lower central shaft fixed below the chassis, a first transmission shaft rotatably arranged below the chassis, and a first driving member for driving the first transmission shaft to rotate; the lower central shaft is distributed concentrically with the clamping tool for the water turbine body, a first gear is provided on the lower central shaft, and all the inner support columns are connected to the end face of the first gear; the first transmission shaft is distributed eccentrically with respect to the clamping tool for the water turbine body, and a second gear meshed with the first gear is provided on the first transmission shaft.

[0008] Preferably, a shaft hole for clamping and rotatably fitting the lower end of the inner support column is provided on the end face of the first gear.

[0009] Preferably, the second driving mechanism includes a third gear rotatably arranged on the lower central shaft, a second transmission shaft concentrically fixed to the third gear, and a second driving member for driving the second transmission shaft to rotate, and all the outer support columns are connected to the end face of the third gear.

[0010] Preferably, the outer support column is connected to the third gear through a crank, a shaft hole for rotatably fitting the lower end of the outer support column is provided at one end of the crank, and the other end of the crank is rotatably arranged in a shaft hole provided on the end face of the third gear.

[0011] Preferably, rollers for rolling cooperation with the water turbine blade are provided at the upper ends of the inner support column and the outer support column.

[0012] Preferably, the support frame includes a support bottom plate and a support baffle fixed on the support bottom plate and away from the support column group.

[0013] Preferably, the clamping tool for the water turbine body includes an upper central shaft fixed on the chassis and a plurality of clamping grooves radially opened with the upper central shaft as the center. The upper end of the upper central shaft is used to support the central position of the bottom of the water turbine body, and a pressing block and a spring for pushing the pressing block towards the upper central shaft direction to clamp the outer edge position of the water turbine body are provided in the groove.

[0014] Preferably, a hydraulic mechanism for driving the upper central shaft to slide longitudinally is provided on the chassis.

[0015] The beneficial effects of the present invention are as follows:

[0016] (1) The present invention is specially designed for the complex curved surface structure of the water turbine blade, and can realize the high-precision positioning and stable support of the blade. By precisely controlling the welding trajectory and angle, defects such as misalignment and deformation generated during the welding process are effectively reduced, and the welding quality is improved.

[0017] (2) The present invention can be used in conjunction with a welding robot or automated welding equipment to achieve the automation of the welding process, reduce manual intervention, and significantly improve production efficiency.

[0018] (3) The present invention can quickly adjust the fixture structure according to different models and specifications of water turbine blades, adjust the angles between each blade and the body at the same frequency and amplitude to meet the welding requirements of each blade. For the complex curved surface of the water turbine blade, a flexible support mechanism is designed to avoid damage to the blade surface.

[0019] (4) The assembly requirements of the present invention are relatively low. One end of the blade can be placed on the support frame first, and then the required welding angle can be achieved by adjusting the position of the support columns at the same frequency.

[0020] In summary, through innovative points such as high-precision positioning and modular design, the present invention significantly improves the quality, efficiency, and consistency of the welding of water turbine blades, while reducing labor intensity and production costs, and has important industrial application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic top view structure diagram of the present invention;

[0022] Figure 2 is a schematic longitudinal sectional structure diagram of the present invention;

[0023] Figure 3 is a schematic diagram of the state where the outer support column and the support frame in the present invention partially support the water turbine blade;

[0024] Reference numerals in the figures: 1, water turbine body clamping tooling, 101, clamping groove, 102, spring, 103, pressing block, 104, upper central shaft, 105, internal piston, 106, pulley, 107, internal hydraulic cylinder, 108, hydraulic pipeline, 109, external piston, 110, power assembly, 111, external hydraulic cylinder, 2, chassis, 3, water turbine blade support tooling, 301, outer support column, 302, inner support column, 303, inner sliding groove, 304, outer sliding groove, 305, support frame, 306, roller, 307, crank, 308, second transmission shaft, 309, third gear, 310, first gear, 311, first transmission shaft, 312, second gear, 313, support bottom plate, 314, support baffle, 315, boss, 317, groove, 318, lower central shaft, 4, water turbine body, 5, water turbine blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] As Figure 1As shown in the figure, a support device for welding a water turbine blade according to the present invention includes a circular chassis 2, a water turbine body clamping tool 1 disposed on the chassis 2, and a water turbine blade support tool 3. The water turbine body clamping tool 1 is located at the center of the chassis 2 and is used for clamping and fixing the water turbine body 4 to ensure the stability of the water turbine body 4 at the center of the water turbine during the welding process. The number of the water turbine blade support tools 3 is six, which is the same as the number of the water turbine blades 5 to be welded. The water turbine blade support tool 3 is used to support the water turbine blade 5 and can synchronously, at the same speed, and with the same amplitude adjust the inclination angle of the water turbine blade 5 to adapt to the welding use of water turbines of different specifications and models.

[0026] Combined with Figure 1 and Figure 2 As shown in the figure, the water turbine body clamping tool 1 mainly includes an upper central shaft 104 concentrically disposed above the chassis 2 and a plurality of clamping grooves 101 that are circular with the upper central shaft 104 and are radially distributed. The upper end of the upper central shaft 104 is used to support the bottom center position of the water turbine body 4. A pressing block 103 is slidably disposed in the clamping groove 101, and a spring 102 is disposed between the side of the pressing block 103 opposite to the upper central shaft 104 and the outer end wall of the clamping groove 101, so that the spring 102 generates a potential energy that pushes the pressing block 103 toward the upper central shaft 104 after being compressed, and then the pressing block 103 tightly presses on the outer edge position of the bottom of the water turbine body 4 to form a clamping and fixing effect.

[0027] In this embodiment, a hydraulic mechanism for driving the upper central shaft 104 to move up and down is disposed on the chassis 2. The hydraulic mechanism includes an internal hydraulic cylinder 107 fixed at the center of the chassis 2 and an external hydraulic cylinder 111 disposed outside the chassis 2. An internal piston 105 is provided in the internal hydraulic cylinder 107, and the upper central shaft 104 is fixedly disposed at the top of the internal piston 105. An external piston 109 is provided in the external hydraulic cylinder 111, and the chamber below the external piston 109 in the external hydraulic cylinder 111 is connected to the chamber below the internal piston 105 in the internal hydraulic cylinder 107 through a hydraulic pipeline 108 opened in the chassis 2. The top of the external piston 109 is connected to a power assembly 110 to push the external piston 109 to move vertically through the power assembly 110, so as to drive the internal piston 105 and the upper central shaft 104 thereon to move vertically through hydraulic oil to realize lifting, and further enable the present invention to adapt to the welding clamping requirements of the water turbine bodies 4 of water turbines of different specifications and models. In this embodiment, a plurality of pulleys 106 that are in rolling fit with the inner wall of the internal hydraulic cylinder 107 are spaced apart on the outer periphery of the upper central shaft 104 to assist the upper central shaft 104 in moving and ensure its movement direction.

[0028] The above-mentioned power assembly 110 is an eccentric connecting rod driven by a motor commonly used in the art, and in other embodiments, it can also be driven by other common power forms in the art.

[0029] Combined with Figure 1 、 Figure 2 and Figure 3 As shown, any set of turbine blade support tooling 3 includes a support frame 305 and a support column group. The support frame 305 has a support base plate 313 and a support baffle 314 fixed on one side of the support base plate 313 away from the support column group. The support base plate 313 is for placing one end of the turbine blade 5, and the support baffle 314 is for top-touching and cooperating with this end of the turbine blade 5 for positioning. The support column group includes an inner support column 302 and an outer support column 301 distributed from the inside out. The upper ends of the inner support column 302 and the outer support column 301 are respectively used to support the inner side near the center of the chassis 2 and the outer side away from the center of the chassis 2 at the other end of the turbine blade 5. Based on the above structure, after adjusting the positions of the inner support column 302 and the outer support column 301, the turbine blade 5 can be supported to form a specific angle, so that the turbine blade 5 can be welded and fixed on the turbine body 4 at this specific angle. In this embodiment, an inner sliding groove 303 for the inner support column 302 to slide fit and an outer sliding groove 304 for the outer support column 301 to slide fit are penetrated and provided on the chassis 2. Both the inner sliding groove 303 and the outer sliding groove 304 are arc-shaped and are set with the center of the chassis 2 as the center of the circle, so that the inner support column 302 and the outer support column 301 can move along the inner sliding groove 303 and the outer sliding groove 304 respectively under the drive of an external force, thereby supporting the turbine blade 5 at a specific angle.

[0030] In order to realize the adjustment of the positions of the inner support column 302 and the outer support column 301, and further realize the synchronous, same-direction and same-amplitude movement of all the inner support columns 302 and the outer support columns 301 respectively, and further improve the convenience of the implementation of the present invention, the present invention is provided with a first driving mechanism and a second driving mechanism on the lower edge of the chassis 2.

[0031] As Figure 2 shown, a lower central shaft 318 is fixedly provided at the central and western position of the bottom of the chassis 2. The first driving mechanism includes a first gear 310 rotatably provided on the lower central shaft 318 and a second gear 312 meshed and connected with the first gear 310. A shaft hole is provided on the upper end surface of the first gear 310, and the lower end of the inner support column 302 passes through the chassis 2 and is rotatably fitted with this shaft hole, so that all the inner support columns 302 can move synchronously after the first gear 310 rotates, completing the position adjustment of the inner side of the end of the turbine blade 5. The second gear 312 is fixed on a first transmission shaft 311 rotatably provided at the bottom of the chassis 2, and the lower end of the first transmission shaft 311 is connected to a driving member such as a motor, and the driving is completed by the motor.

[0032] The second driving mechanism includes a third gear 309 rotatably arranged on the lower central shaft 318. A second transmission shaft 308 is connected to the bottom of the third gear 309, and the second transmission shaft 308 is connected to a driving component such as a motor. The end face of the third gear 309 is connected to all the outer support columns 301 through a crank 307. The inner end of the crank 307 is rotationally matched with a shaft hole formed on the end face of the third gear 309, and the outer end is provided with a shaft hole for the outer support column 301 to be inserted and rotationally matched.

[0033] To ensure the stability of the sliding of the outer support column 301, as Figure 3 shown, bosses 315 are provided in the middle of all the outer support columns 301, and grooves 317 for the bosses 315 to be inserted and slidingly matched are correspondingly provided in the outer sliding grooves 304. Ball bearings are also provided at intervals on the outer periphery of the bosses 315 to ensure the smoothness of the sliding pair. A roller 306 is also provided at the upper end of the outer sliding column to ensure the smoothness of the rolling fit between its upper end and the water turbine blade 5 during adjustment. The inner support column 302 also slides with the chassis 2 through the above-mentioned boss 315 and groove 317 structure and rolls with the water turbine blade 5 through the roller 306, which will not be elaborated here.

[0034] Based on the above structure, the working process of the present invention is as follows:

[0035] (1) Place the water turbine body 4 on the top of the upper central shaft 104, drive the external piston 109 to move through the power assembly 110, control the movement of the liquid in the hydraulic pipeline 108 to push and press the upper central shaft 104, and adjust the height of the upper central shaft 104. And fix the position of the water turbine body 4 through the pressing block 103 and the spring 102 device.

[0036] (2) Place one end of the water turbine blade 5 on the support frame 305 and the other end on the rollers 306 at the tops of the inner support column 302 and the outer support column 301.

[0037] (3) According to the included angle between the water turbine blade 5 and the water turbine body 4 required by the welding process, drive the inner support column 302 and the outer support column 301 to move respectively through the first driving member and the second driving member. And by changing the positions of the pulleys 106 at the tops of the outer sliding column and the inner sliding column, the control of the included angle between the water turbine blade 5 and the water turbine body 4 is realized.

[0038] (4) After the included angle between the water turbine blade 5 and the water turbine body 4 is adjusted, weld the water turbine blade 5 and the water turbine body 4 in sequence.

Claims

1. A support device for welding turbine blades, characterized in that: The invention comprises a chassis (2) and a turbine body clamping fixture (1) and a turbine blade supporting fixture (3) arranged on the chassis (2); the turbine blade supporting fixtures (3) are multiple in number and are distributed in a ring shape with the turbine body clamping fixture (1) as the center; any turbine blade supporting fixture (3) comprises a support column group for supporting one end of a turbine blade (5) and a support frame (305) for supporting the other end of the turbine blade (5); the support column group comprises inner support columns (305) distributed outwardly in sequence from the turbine body clamping fixture (1). 2) and an outer support column (301), the inner support column (302) and the outer support column (301) are respectively used to support the two sides of the end of the turbine blade (5), an inner slide groove (303) for sliding cooperation with the inner support column (302) and an outer slide groove (304) for sliding cooperation with the outer support column (301) are provided on the chassis (2), as well as a first driving mechanism for driving all the inner support columns (302) to slide synchronously along the corresponding inner slide groove (303) and a second driving mechanism for driving all the outer support columns (301) to slide synchronously along the corresponding outer slide groove (304).

2. A support device for welding turbine blades as claimed in claim 1, characterized in that: The inner slide groove (303) and the outer slide groove (304) are both arc-shaped, and the centers of the inner slide groove (303) and the outer slide groove (304) coincide with the turbine body clamping fixture (1).

3. A support device for welding turbine blades as claimed in claim 2, characterized in that: The first driving mechanism comprises a lower central shaft (318) fixed below the chassis (2), a first transmission shaft (311) rotatably arranged below the chassis (2), and a first driving member for driving the first transmission shaft (311) to rotate; the lower central shaft (318) is coaxially arranged with the turbine body clamping fixture (1), a first gear (310) is arranged on the lower central shaft (318), and all the inner support columns (302) are connected to the end surface of the first gear (310); the first transmission shaft (311) is eccentrically arranged with the turbine body clamping fixture (1), and a second gear (312) meshingly connected with the first gear (310) is arranged on the first transmission shaft (311).

4. A support device for welding turbine blades as claimed in claim 3, characterized in that: The end surface of the first gear (310) is provided with an axial hole for the lower end of the inner support column (302) to be clamped and rotatably engaged.

5. A support device for welding turbine blades as claimed in claim 3, characterized in that: The second driving mechanism comprises a third gear (309) rotatably arranged on the lower central shaft (318), a second transmission shaft (308) concentrically fixed to the third gear (309), and a second driving member for driving the second transmission shaft (308) to rotate, and all the outer support columns (301) are connected to the end faces of the three gears.

6. A support device for welding turbine blades as claimed in claim 5, characterized in that: The outer support column (301) is connected to the third gear (309) via a crank (307). One end of the crank (307) is provided with an axial hole for rotationally engaging the lower end of the outer support column (301). The other end of the crank (307) is rotatably arranged in an axial hole provided on the end surface of the third gear (309).

7. A support device for welding turbine blades as claimed in claim 1, characterized in that: The upper ends of the inner support column (302) and the outer support column (301) are both provided with rollers (306) that roll with the turbine blades (5).

8. A support device for welding turbine blades as claimed in claim 1, characterized in that: The support frame (305) comprises a support base plate (313) and a support baffle plate (314) fixed on the support base plate (313) and away from the support column group.

9. A support device for welding turbine blades as claimed in claim 1, characterized in that: The turbine body clamping tool (1) comprises an upper central axis (104) fixed on a chassis (2) and a plurality of clamping grooves (101) radially opened with the upper central axis (104) as the center, the upper end of the upper central axis (104) being used to support the center position of the bottom of the turbine body (4), a pressing block (103) and a spring (102) for pushing the pressing block (103) toward the upper central axis (104) to clamp the outer edge position of the turbine body (4) are provided in the groove (317).

10. A support device for welding turbine blades as claimed in claim 9, characterized in that: The chassis (2) is provided with a hydraulic mechanism for driving the upper central shaft (104) to slide longitudinally.

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