Water turbine head cover additive and subtractive repairing device and method

Abstract

A water turbine head cover additive and subtractive repairing device and method. The device comprises a rotation bearing platform, a connecting arm, a moving frame and a machining device; the rotation bearing platform comprises a base and a rotating seat mounted on the base, a driving device being mounted on the base, and an output shaft of the driving device being in driving connection to the rotating seat; one end of the connecting arm is connected to the rotating seat, and the other end of the connecting arm is connected to the moving frame; a lifting / lowering plate is mounted on the moving frame, a sliding table assembly and a measuring system being mounted on the upper side of the lifting / lowering plate; a revolving seat is mounted on the upper side of the sliding table assembly, the machining device being detachably mounted on the revolving seat. The rotation bearing platform drives the moving frame to rotate, and the machining device is mounted on the moving frame and can be replaced with a different machining device to machine a head cover, thus achieving good repairing quality and high precision. Replacing humans with machinery decreases the labor intensity of workers, improves working environments, and greatly reduces the safety risk of human operations.

Description

A device and method for repairing a turbine top cover by adding or subtracting material Technical Field

[0001] The present invention relates to the technical field of repairing and processing a turbine top cover, and in particular to a device and method for repairing a turbine top cover by adding or subtracting material. Background Art

[0002] As one of the most important flow-through components of a hydro-turbine generator set, the top cover is subjected to long-term cavitation erosion by water flow during the operation of the unit. Many cavitation pits will form on the flow-through surface, posing a great safety hazard to the safe operation of the unit. The top cover is large in size, with a diameter of up to 10 meters. The traditional repair method is to first dismantle the top cover, then transport it to the factory for repair and maintenance, and use traditional manual grinding and manual welding methods. This method is not only labor-intensive, has a poor working environment, and high safety risks for manual operation, but also has poor welding quality and grinding effect of the top cover. It cannot well control the quality of the top cover repair, the grinding flatness is low, and the dimensional accuracy error is large. At present, the top cover still faces the current situation of a wide damaged area, deep cavitation depth, and a large maintenance workload.

[0003] Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to solve the problems existing in the above-mentioned background technology, and to provide a turbine top cover material addition and subtraction repair device, which drives the movable frame to rotate by rotating the support platform, and is equipped with a processing device, which can replace different processing devices to process the top cover, and has good repair quality. The machine replaces manual labor, which reduces the labor intensity of the personnel, improves the working environment, and greatly reduces the safety risks of manual operation.

[0005] Another technical problem to be solved by the present invention is to provide a method using a turbine top cover material addition and subtraction repair device for performing material addition and subtraction repair processing on the turbine top cover.

[0006] In order to achieve the above-mentioned technical features, the purpose of the present invention is achieved as follows: A turbine top cover additive and subtractive material repair device, comprising a rotating support platform, a connecting arm, a movable frame and a processing device, the rotating support platform comprising a base and a rotating seat mounted on the base, a driving device mounted on the base, an output shaft of the driving device connected to the rotating seat for transmission, one end of the connecting arm is connected to the rotating seat, and the other end is connected to the movable frame, a lifting plate is mounted on the movable frame, a slide assembly and a measuring system are mounted on the upper side of the lifting plate, a slewing seat is mounted on the upper side of the slide assembly, and the processing device is detachably mounted on the slewing seat.

[0007] The base is a frame structure, with multiple adjustable feet installed at the bottom of the lower end of the base, multiple fixed feet installed on the outer side of the lower end of the base, a driving device installed on the upper inner side of the base, and a counterweight placed on the lower inner side of the base.

[0008] The driving device includes a motor mounting frame and a first motor, the motor mounting frame is mounted on the inner upper side of the base, the first motor is mounted on the lower side of the motor mounting frame, a driving gear is provided on the upper side of the base, the driving gear is connected to the output shaft of the first motor for transmission, a driven gear is also installed on the upper side of the base through a rotating shaft, the driven gear is meshed with the driving gear, the rotating seat is located on the upper side of the driven gear, a first torque sensor is installed in the rotating seat, the rotating seat is connected and fixed to the driven gear through the first torque sensor, an encoder is also installed on the inner upper side of the base, and the rotating shaft of the encoder is connected to the rotating shaft of the driven gear.

[0009] The connecting arm is composed of multiple sections, and the multiple sections of the connecting arm are connected by butt bolts.

[0010] The mobile frame comprises a frame body, casters are installed at the bottom of the frame body, and a control cabinet is installed at one side of the frame body.

[0011] A support frame is installed at the bottom of the lifting plate, and a support plate is installed at the bottom of the support frame. The movable frame is longitudinally installed with guide shafts at the four corners of the support plate, and the support plate is slidably installed on the guide shafts. The first ball screw and the second motor are also longitudinally installed on the movable frame. The output shaft of the second motor is connected to one end of the first ball screw for transmission. A first screw nut is also installed on the support plate, and the first screw nut is screwed onto the first ball screw.

[0012] The slide assembly includes two guide rails, each guide rail is equipped with two sliders, a swivel seat is installed on the four sliders, the guide rails are installed on the lifting plate, and a third motor and a second ball screw are also installed on the lifting plate. The output shaft of the third motor is connected to one end of the second ball screw for transmission, and a second screw nut is installed at the bottom of the swivel seat, and the second ball screw is screwed to the second screw nut; the swivel seat is driven by the third motor to move along the rotation radius of the movable frame.

[0013] The rotary seat includes a base plate, a fourth motor is installed on the lower side of the base plate, the output shaft of the fourth motor extends upward from the base plate, the output shaft of the fourth motor is installed with a driving gear on the upper side of the base plate, a passive gear is also installed on the upper side of the base plate through a rotating shaft, the passive gear is engaged with the driving gear, a second torque sensor is installed on the upper side of the passive gear, a connecting plate is installed on the upper side of the second torque sensor, a positioning piece is installed on the connecting plate, and the processing device is installed on the connecting plate.

[0014] The processing device includes a grinding component tool, a laser cladding component tool and an arc additive component tool.

[0015] The method of using the above-mentioned device for repairing a turbine top cover by adding or subtracting material is used for repairing a turbine top cover by adding or subtracting material, and includes the following steps:

[0016] S1: Place at least three support columns on the ground with a diameter smaller than the roof, with the upper side of each support column on the same horizontal plane;

[0017] S2: Remove and hoist the roof cover onto the support columns. The support columns can stably support the roof cover without interfering with the repair area near the edge of the roof cover.

[0018] S3: Based on the diameter of the top cover, determine the center of the lower side of the top cover and mark it;

[0019] S4: Move the rotating platform to the bottom of the top cover, align the rotation center of the rotating seat with the center of the top cover, and then fix the rotating platform;

[0020] S5: Push the mobile frame to the lower side of the top cover and close to the edge, connect one end of the connecting arm to the rotating base bolt, and connect the other end to the mobile frame bolt;

[0021] S6: Adjust the height of the lifting plate so that the measurement system can observe the repair area, start the drive device, and the drive device drives the rotating seat to rotate, thereby driving the mobile frame to rotate through the connecting arm. The measurement system performs a circular scanning and mapping of the repair area on the lower side of the top cover. Based on the scanning and mapping data, the control system plans the process route;

[0022] S7: After the device scans and maps for one rotation, the drive device stops and the processing device is installed on the rotary seat. At this time, the processing device uses the grinding component tool to adjust the position of the lifting plate so that the grinding component tool contacts the repair area and performs rotary grinding according to the process route planned by the control system. During the operation, the measurement system measures and maps data in real time. According to the feedback deviation value, the system automatically compensates and corrects the process trajectory. The rotation of the rotary seat adjusts the grinding angle of the grinding component tool, and the slide assembly adjusts the grinding position of the grinding component tool.

[0023] S7: After the device has rotated for one or more revolutions, the driving device stops, the lifting plate descends, the grinding component tool on the rotary seat is removed, and the arc additive component tool is installed. Then, the lifting plate rises to a preset position, the driving device is started, and the repair area of ​​the top cover is processed by the arc additive process. The control system plans the process route and controls the wire feed speed and amount of the arc welding machine to meet the arc additive process requirements.

[0024] S8: After the arc additive processing device rotates one or more times, the driving device stops, the lifting plate descends, the arc additive component tool on the rotary seat is removed, and the laser cladding component tool is installed. Then the lifting plate rises to the preset position, the driving device is started, and the laser cladding process is performed on the repair area of ​​the top cover. The control system plans the process route and controls the wire feed speed and amount of the arc welding machine to meet the arc additive process requirements; the control system plans the process route and measures the thickness of the cladding layer in real time, compares the thickness requirement of the cladding layer, and controls the powder feeding amount.

[0025] The present invention has the following beneficial effects:

[0026] 1. The base is used to fix the center point position; the drive device is used to drive the rotating seat to rotate; the rotating seat drives the mobile frame to rotate through the connecting arm; the lifting plate can be raised and lowered to adjust the height of the processing device; the slide assembly can move the swivel seat along the rotation radius of the mobile frame to adjust the processing position of the processing device; the swivel seat can rotate to adjust the processing direction of the processing device; the measuring system is used to map and determine the position, size, and depth of the defects in the repair area. During processing, the lifting plate can adjust the height of the processing device in real time through real-time detection by the measuring system, thereby eliminating the height error caused by uneven ground. A processing device is installed on the mobile frame, and different processing devices can be replaced to process the top cover. The top cover repaired by this device is of high quality and high precision. Machinery replaces manual labor, which reduces the labor intensity of personnel, improves the working environment, and greatly reduces the safety risks of manual operation.

[0027] 2. Modular design allows the repair device to be split into several units. Each unit can be independently transported to the location of the top cover and then assembled for use, which is convenient for transportation and assembly.

[0028] 3. It has a wide range of adaptability. The size of the roof can be repaired by adding or subtracting materials as needed, and the corresponding high-strength rotating connecting arms of different lengths can be matched to meet the process repair requirements of roofs of different sizes, while other independent module units remain unchanged.

[0029] 4. Quick assembly. Each independent unit module is connected with a quick installation interface, which is convenient for personnel to operate and assemble, without excessive debugging to make the equipment meet the accuracy requirements.

[0030] 5. Reduce labor intensity and improve working environment by using equipment for grinding, laser cladding and arc additive repair of the top cover to replace manual repair work.

[0031] 6. The repair quality is good. The top cover portable in-situ additive and subtractive material repair device is used. Compared with manual repair, the equipment structure is stable and the trajectory of the end process parts is precisely controlled, so that the top cover surface repair is balanced and consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a schematic diagram of the three-dimensional structure of the present invention.

[0033] FIG2 is a schematic diagram of the three-dimensional structure of the rotary support platform of the present invention.

[0034] FIG3 is a schematic diagram of the three-dimensional structure of the mobile frame of the present invention.

[0035] FIG4 is a schematic diagram of the three-dimensional structure of the movable frame of the present invention from another perspective.

[0036] FIG5 is a schematic diagram of the three-dimensional structure of the rotary seat of the present invention.

[0037] FIG6 is a schematic diagram of the structure of the grinding assembly tool installed on the rotary seat of the present invention.

[0038] FIG7 is a schematic diagram of the tool structure of the laser cladding assembly installed on the rotary seat of the present invention.

[0039] FIG8 is a schematic diagram of the tool structure of the arc additive assembly installed on the rotary seat of the present invention.

[0040] FIG9 is a schematic structural diagram of the present invention in use.

[0041] In the figure: rotating platform 100, base 110, adjustable foot 111, fixed foot 112, rotating base 120, first torque sensor 121, driven gear 122, encoder 123, driving device 130, motor mounting bracket 131, first motor 132, driving gear 133, counterweight 140;

[0042] Connecting arm 200, docking bolt 210;

[0043] Mobile frame 300, frame body 310, casters 311, lifting plate 320, support frame 321, support plate 322, guide shaft 323, second motor 324, first ball screw 325, first screw nut 326, slide assembly 330, guide rail 331, slider 332, third motor 333, second ball screw 334, swivel seat 340, base plate 341, fourth motor 342, driving gear 343, driven gear 344, second torque sensor 345, connecting plate 346, positioning member 347, measurement system 350, control cabinet 360; processing device 400, grinding assembly tool 410, laser cladding assembly tool 420, arc additive assembly tool 430;

[0044] Top cover 500 , repair area 501 , support column 600 . DETAILED DESCRIPTION

[0045] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0046] Example 1:

[0047] Referring to Figures 1-8, a turbine top cover additive and subtractive material repair device includes a rotating platform 100, a connecting arm 200, a movable frame 300 and a processing device 400. The rotating platform 100 includes a base 110 and a rotating seat 120 installed on the base 110. A driving device 130 is installed on the base 110. The output shaft of the driving device 130 is connected to the rotating seat 120 for transmission. One end of the connecting arm 200 is connected to the rotating seat 120, and the other end is connected to the movable frame 300. A lifting plate 320 is installed on the movable frame 300. A slide assembly 330 and a measuring system 350 are installed on the upper side of the lifting plate 320. A slewing seat 340 is installed on the upper side of the slide assembly 330, and the processing device 400 is detachably installed on the slewing seat 340. The movable frame 300 is driven to rotate 360° in a circle by the rotating base 100. A processing device 400 is installed on the movable frame 300, and different processing devices can be replaced to process the top cover. The repair quality is good and the precision is high. The machine replaces manual labor, which reduces the labor intensity of the personnel, improves the working environment, and greatly reduces the safety risks of manual operation.

[0048] During use, the base 110 is used to fix the center point position; the drive device 130 is used to drive the rotating base 120 to rotate; the rotating base 120 drives the mobile frame 300 to rotate via the connecting arm 200; the lifting plate 320 can be raised and lowered to adjust the height of the processing device 400; the slide assembly 330 can move the rotating base 340 along the rotation radius of the mobile frame 300, thereby adjusting the processing position of the processing device 400; the rotating base 340 can rotate to adjust the processing direction of the processing device 400; the measurement system 350 is used to map and determine the position, size, and depth of defects on the repair area 501. During processing, through real-time detection by the measurement system 350, the lifting plate 320 can adjust the height of the processing device 400 in real time, thereby eliminating height errors caused by uneven ground.

[0049] Preferably, the measurement system 350 adopts a visual measurement system of model ZNJG-CL03, and of course a laser radar measurement system can also be adopted.

[0050] Referring to Figure 2 , base 110 is a frame structure. A plurality of adjustable feet 111 are mounted on the bottom of the lower end of base 110. A plurality of fixed feet 112 are mounted on the outer side of the lower end of base 110. A drive device 130 is mounted on the upper interior side of base 110. A counterweight 140 is positioned on the lower interior side of base 110. Adjustable feet 111 are used to adjust the level of rotating platform 100. The placement of counterweight 140 increases the friction between adjustable feet 111 and the ground, ensuring the stability of base 110.

[0051] During use, the level of the rotating platform 100 is adjusted by adjusting the feet 111. When the rotation center of the rotating base 120 is aligned with the center of the top cover 500, multiple counterweights 140 are placed inside the base 110 to secure the base 110. Alternatively, the base 110 can be secured by connecting the fixing feet 112 with anchor bolts.

[0052] Specifically, referring to FIG2 , the drive device 130 includes a motor mounting frame 131 and a first motor 132. The motor mounting frame 131 is mounted on the inner upper side of the base 110, and the first motor 132 is mounted on the lower side of the motor mounting frame 131. A driving gear 133 is provided on the upper side of the base 110, and the driving gear 133 is connected to the output shaft of the first motor 132 for transmission. A driven gear 122 is also mounted on the upper side of the base 110 via a rotating shaft, and the driven gear 122 meshes with the driving gear 133. The rotating base 120 is located on the upper side of the driven gear 122. A first torque sensor 121 is mounted in the rotating base 120, and the rotating base 120 is connected and fixed to the driven gear 122 via the first torque sensor 121. An encoder 123 is also mounted on the inner upper side of the base 110, and the rotating shaft of the encoder 123 is connected to the rotating shaft of the driven gear 122. Through the above structure, the rotation of the rotating base 120 is achieved. The first torque sensor 121 adopts a six-dimensional force sensor.

[0053] During use, the first motor 132 drives the driving gear 133 to rotate, and the driving gear 133 drives the driven gear 122. The driven gear 122 is bolted to the first torque sensor 121, and the first torque sensor 121 is bolted to the rotating base 120, thereby driving the rotating base 120 to rotate around the rotating shaft of the driven gear 122. The rotating shaft of the driven gear 122 is not shown in the figure. The driven gear 122 is fixedly connected to the rotating shaft, and the rotating shaft is rotatably connected to the base 110 through the bearing seat. The first torque sensor 121 is used to monitor the load condition of the rotating base 120 in real time. When overloaded, the equipment will alarm and shut down, which can effectively protect the equipment. The encoder 123 monitors the operating angle of the rotating base 120, so as to know the position of the mobile frame 300.

[0054] 1 , the connecting arm 200 is composed of multiple sections, which are connected by butt bolts 210. This structure not only facilitates the transport of the device, but also allows connecting arms 200 of different lengths to be replaced according to the diameter of the top cover 500, making the device more versatile.

[0055] Referring to Figures 3 and 4 , mobile frame 300 includes a frame body 310, with casters 311 mounted on the bottom of frame body 310. A control cabinet 360 is mounted on one side of frame body 310. Specifically, casters 311 are four universal wheels that, driven by a driving force, enable mobile frame 300 to move flexibly in a circular motion. The control system is housed within control cabinet 360.

[0056] Referring to Figure 4 , a support frame 321 is mounted at the bottom of the lifting plate 320, and a support plate 322 is mounted at the bottom of the support frame 321. Guide shafts 323 are longitudinally mounted on the four corners of the support plate 322 of the movable frame 300. The support plate 322 is slidably mounted on the guide shafts 323. A first ball screw 325 and a second motor 324 are also longitudinally mounted on the movable frame 300. The output shaft of the second motor 324 is connected to one end of the first ball screw 325 for transmission. A first screw nut 326 is also mounted on the support plate 322 and is screwed onto the first ball screw 325. This structure enables the lifting and lowering of the lifting plate 320 to be adjusted.

[0057] During operation, the second motor 324 drives the first ball screw 325 to rotate. Since the first ball screw nut 326 is screwed together with the first ball screw 325, the first ball screw nut 326 moves up and down along the first ball screw 325, thereby driving the support plate 322 to move up and down, and further driving the lifting plate 320 to move up and down. Specifically, a guide sleeve is installed on the support plate 322, and the guide sleeve is slidably connected to the guide shaft 323, ensuring stable and horizontal upward and downward movement of the support plate 322.

[0058] Referring to Figures 4 and 5 , the slide assembly 330 includes two guide rails 331 , each of which is mounted with two sliders 332 . A swivel seat 340 is mounted on the four sliders 332 . The guide rails 331 are mounted on the lifting plate 320 . A third motor 333 and a second ball screw 334 are also mounted on the lifting plate 320 . The output shaft of the third motor 333 is connected to one end of the second ball screw 334 for transmission. A second screw nut is mounted at the bottom of the swivel seat 340 , and the second ball screw 334 is screwed to the second screw nut. The swivel seat 340 is driven by the third motor 333 to move along the rotation radius of the mobile frame 300 . Through the above structure, the swivel seat 340 can move along the rotation radius of the mobile frame 300 .

[0059] During use, the third motor 333 drives the second ball screw 334 to rotate. The swivel seat 340 is mounted on the four sliders 332. A second screw nut is mounted on the bottom of the swivel seat 340. The second screw nut is engaged with the second ball screw 334, thereby driving the swivel seat 340 to translate along the guide rail 331. Specifically, the two guide rails, as well as the guide rail and the second ball screw, are parallel to each other.

[0060] 3 and 5 , the rotary seat 340 includes a base plate 341, a fourth motor 342 is mounted on the lower side of the base plate 341, the output shaft of the fourth motor 342 extends upward from the base plate 341, and a driving gear 343 is mounted on the output shaft of the fourth motor 342 on the upper side of the base plate 341. A driven gear 344 is also mounted on the upper side of the base plate 341 via a rotating shaft, and the driven gear 344 meshes with the driving gear 343. A second torque sensor 345 is mounted on the upper side of the driven gear 344, and a connecting plate 346 is mounted on the upper side of the second torque sensor 345. A positioning member 347 is mounted on the connecting plate 346, and the processing device 400 is mounted on the connecting plate 346. Through the above structure, the processing device 400 mounted on the rotary seat 340 can be rotated.

[0061] During use, the fourth motor 342 drives the driving gear 343 to rotate, the driving gear 343 drives the passive gear 344 to rotate, the passive gear 344 drives the second torque sensor 345 to rotate, and the second torque sensor 345 drives the connecting plate 346 to rotate, thereby driving the processing device 400 to rotate. The second torque sensor 345 is used to monitor the load condition of the connecting plate 346 in real time. When overloaded, the equipment alarms and shuts down, which can effectively protect the equipment. Specifically, the connecting plate 346 is provided with a threaded hole, and the processing device 400 is installed on the connecting plate 346 by bolts. The positioning member 347 is used to position the processing device 400, facilitating the rapid installation of the processing device 400. The second torque sensor 345 adopts a six-dimensional force sensor.

[0062] 6-8 , the processing device 400 includes a grinding tool assembly 410, a laser cladding tool assembly 420, and an arc additive tool assembly 430. By using different interchangeable tools, repair work at different stages can be performed, achieving high work efficiency and high processing accuracy.

[0063] Example 2:

[0064] 9 , a method for repairing a turbine top cover by adding or subtracting material is used to repair the turbine top cover by adding or subtracting material, including the following steps:

[0065] S1: Place at least three support columns 600 on the ground with a diameter smaller than that of the top cover 500 , with the upper side surfaces of the support columns 600 being on the same horizontal plane.

[0066] S2: The top cover 500 is disassembled, hoisted and placed on the support column 600. The support column 600 can stably support the top cover 500 without interfering with the repair area 501 near the edge of the lower side of the top cover 500.

[0067] S3: According to the diameter of the top cover 500, determine the center of the lower side of the top cover 500 and mark it.

[0068] S4: The rotating platform 100 is moved to the bottom of the top cover 500 , and the rotation center of the rotating base 120 is aligned with the center of the top cover 500 , and then the rotating platform 100 is fixed.

[0069] S5: Push the moving frame 300 to the lower side of the top cover 500 and close to the edge, bolt one end of the connecting arm 200 to the rotating base 120 and bolt the other end to the moving frame 300.

[0070] S6: Adjust the height of the lifting plate 320 so that the measuring system 350 can measure and observe the repair area 501, start the driving device 130, and the driving device 130 drives the rotating seat 120 to rotate, thereby driving the movable frame 300 to rotate through the connecting arm 200. The measuring system 350 performs a circular scanning and mapping data on the repair area 501 on the lower side of the top cover 500. Based on the scanning and mapping data, the control system plans the process route.

[0071] S7: After the device scans and maps and rotates for one circle, the driving device 130 stops and the processing device 400 is installed on the rotary seat 340. At this time, the processing device 400 uses the grinding component tool 410 to adjust the position of the lifting plate 320 so that the grinding component tool 410 contacts the repair area 501 and performs rotational grinding according to the process route planned by the control system; during the operation, the measurement system measures data in real time, and according to the feedback deviation value, the system automatically compensates and corrects the process trajectory; the rotary seat 340 rotates to adjust the grinding angle of the grinding component tool 410, and the slide assembly 330 adjusts the grinding position of the grinding component tool 410; through real-time detection by the measurement system 350, the lifting plate 320 can adjust the height of the processing device 400 in real time, thereby eliminating the height error caused by uneven ground.

[0072] S7: After the device has completed one or more grinding rotations, the driving device 130 stops, the lifting plate 320 descends, the grinding assembly tool 410 on the rotary seat 340 is removed, and the arc additive assembly tool 430 is installed. Then, the lifting plate 320 rises to a preset position, the driving device 130 is started, and the repair area 501 of the top cover 500 is subjected to arc additive processing. The control system plans the process route and controls the wire feed speed and amount of the arc welding machine to meet the arc additive process requirements.

[0073] S8: After the arc additive processing device rotates one or more times, the driving device 130 stops, the lifting plate 320 descends, the arc additive component tool 430 on the rotary seat 340 is removed, and the laser cladding component tool 420 is installed. Then the lifting plate 320 rises to the preset position, the driving device 130 is started, and the laser cladding process is performed on the repair area 501 of the top cover 500. The control system plans the process route and controls the wire feed speed and amount of the arc welding machine to meet the arc additive process requirements; the control system plans the process route and measures the thickness of the cladding layer in real time, compares the thickness requirement of the cladding layer, and controls the powder feeding amount.

[0074] By replacing different processing devices to process the top cover, the repair quality is good and the precision is high. Machinery replaces manual labor, which reduces the labor intensity of personnel, improves the working environment, and greatly reduces the safety risks of manual operation.

Claims

1. A device for repairing a turbine top cover by adding or reducing material, characterized in that: The invention comprises a rotating support platform (100), a connecting arm (200), a movable frame (300) and a processing device (400). The rotating support platform (100) comprises a base (110) and a rotating seat (120) mounted on the base (110). A driving device (130) is mounted on the base (110). The output shaft of the driving device (130) is connected to the rotating seat (120) for transmission. One end of the connecting arm (200) is connected to the rotating seat (120), and the other end is connected to the movable frame (300). A lifting plate (320) is mounted on the movable frame (300). A slide assembly (330) and a measuring system (350) are mounted on the upper side of the lifting plate (320). A slewing seat (340) is mounted on the upper side of the slide assembly (330). The processing device (400) is detachably mounted on the slewing seat (340).

2. A water turbine top cover material addition and subtraction repair device according to claim 1, characterized in that: The base (110) is a frame structure, a plurality of adjustable feet (111) are installed at the bottom of the lower end of the base (110), a plurality of fixed feet (112) are installed on the outer side of the lower end of the base (110), a driving device (130) is installed on the upper side of the interior of the base (110), and a counterweight (140) is placed on the lower side of the interior of the base (110).

3. A water turbine top cover material addition and subtraction repair device according to claim 1 or 2, characterized in that: The driving device (130) comprises a motor mounting frame (131) and a first motor (132); the motor mounting frame (131) is mounted on the upper side of the base (110); the first motor (132) is mounted on the lower side of the motor mounting frame (131); a driving gear (133) is arranged on the upper side of the base (110); the driving gear (133) is connected to the output shaft of the first motor (132) for transmission; a driven gear (122) is also mounted on the upper side of the base (110) via a rotating shaft. ), the driven gear (122) is meshed with the driving gear (133), the rotating seat (120) is located on the upper side of the driven gear (122), a first torque sensor (121) is installed in the rotating seat (120), the rotating seat (120) is connected and fixed to the driven gear (122) through the first torque sensor (121), an encoder (123) is also installed on the upper side of the interior of the base (110), and the rotating shaft of the encoder (123) is connected to the rotating shaft of the driven gear (122).

4. The device for repairing a turbine top cover by adding or reducing material according to claim 1, characterized in that: The connecting arm (200) is composed of multiple sections, and the multiple sections of the connecting arm (200) are connected by butt bolts (210).

5. The device for repairing a turbine top cover by adding or reducing material according to claim 1, characterized in that: The mobile frame (300) comprises a frame body (310), a caster (311) is installed at the bottom of the frame body (310), and a control cabinet (360) is installed on one side of the frame body (310).

6. The device for repairing a turbine top cover by adding or reducing material according to claim 1, characterized in that: A support frame (321) is installed at the bottom of the lifting plate (320), and a support plate (322) is installed at the bottom of the support frame (321). The movable frame (300) is longitudinally installed with guide shafts (323) at four corners of the support plate (322), and the support plate (322) is slidably installed on the guide shafts (323). A first ball screw (325) and a second motor (324) are also longitudinally installed on the movable frame (300), and an output shaft of the second motor (324) is connected to one end of the first ball screw (325) for transmission. A first screw nut (326) is also installed on the support plate (322), and the first screw nut (326) is screwed onto the first ball screw (325).

7. The device for repairing a turbine top cover by adding or reducing material according to claim 1, characterized in that: The slide assembly (330) comprises two guide rails (331), each guide rail (331) is mounted with two sliders (332), a swivel seat (340) is mounted on the four sliders (332), the guide rails (331) are mounted on the lifting plate (320), a third motor (333) and a second ball screw (334) are also mounted on the lifting plate (320), an output shaft of the third motor (333) is connected to one end of the second ball screw (334) for transmission, a second screw nut is mounted at the bottom of the swivel seat (340), and the second ball screw (334) is screwed to the second screw nut; the swivel seat (340) is driven by the third motor (333) to move along the rotation radius of the moving frame (300).

8. A water turbine top cover material addition and subtraction repair device according to claim 1 or 7, characterized in that: The swivel seat (340) comprises a base plate (341), a fourth motor (342) is mounted on the lower side of the base plate (341), an output shaft of the fourth motor (342) extends upward from the base plate (341), a driving gear (343) is mounted on the output shaft of the fourth motor (342) on the upper side of the base plate (341), a passive gear (344) is also mounted on the upper side of the base plate (341) via a rotating shaft, the passive gear (344) is meshed with the driving gear (343), a second torque sensor (345) is mounted on the upper side of the passive gear (344), a connecting plate (346) is mounted on the upper side of the second torque sensor (345), a positioning member (347) is mounted on the connecting plate (346), and the processing device (400) is mounted on the connecting plate (346).

9. The device for repairing a turbine top cover by adding or reducing material according to claim 1, characterized in that: The processing device (400) comprises a grinding component tool (410), a laser cladding component tool (420) and an arc additive component tool (430).

10. A method for repairing a turbine top cover by adding or subtracting material according to claim 9 is used for repairing a turbine top cover by adding or subtracting material, characterized in that: The following steps are involved: S1: placing at least three support columns (600) on the ground with a diameter smaller than that of the top cover (500), with the upper side surfaces of the support columns (600) being on the same horizontal plane; S2: The top cover (500) is disassembled, hoisted and placed on the support column (600), and the support column (600) can stably support the top cover (500) and will not interfere with the repair area (501) near the edge of the lower side of the top cover (500); S3: According to the diameter of the top cover (500), determine the center of the lower side of the top cover (500) and mark it; S4: moving the rotating platform (100) to the bottom of the top cover (500), aligning the rotation center of the rotating seat (120) with the center of the top cover (500), and then fixing the rotating platform (100); S5: Push the movable frame (300) to the lower side of the top cover (500) and close to the edge, bolt one end of the connecting arm (200) to the rotating seat (120), and bolt the other end to the movable frame (300); S6: adjusting the height of the lifting plate (320) so that the measuring system (350) can measure and observe the repair area (501), starting the driving device (130), the driving device (130) drives the rotating seat (120) to rotate, thereby driving the moving frame (300) to rotate through the connecting arm (200), and the measuring system (350) performs circular scanning and mapping data on the repair area (501) on the lower side of the top cover (500), and the control system plans the process route according to the scanning and mapping data; S7: After the device scans and maps and rotates for one circle, the driving device (130) stops, and the processing device (400) is installed on the rotating seat (340). At this time, the processing device (400) uses the grinding assembly tool (410) to adjust the position of the lifting plate (320) so that the grinding assembly tool (410) contacts the repair area (501), and performs rotational grinding according to the process route planned by the control system; during the operation, the measurement system measures data in real time, and according to the feedback deviation value, the system automatically compensates and corrects the process trajectory; wherein the rotating seat (340) rotates to adjust the grinding angle of the grinding assembly tool (410), and the slide assembly (330) adjusts the grinding position of the grinding assembly tool (410); S7: After the device has been polished and rotated for one or more cycles, the driving device (130) stops, the lifting plate (320) descends, the polishing assembly tool (410) on the rotary seat (340) is removed, and the arc additive assembly tool (430) is installed. Then, the lifting plate (320) rises to a preset position, the driving device (130) is started, and the repair area (501) of the top cover (500) is processed by arc additive process. The control system plans the process route and controls the feeding speed and amount of the arc welding wire to meet the requirements of the arc additive process. S8: After the arc additive processing device rotates one or more times, the driving device (130) stops, the lifting plate (320) descends, the arc additive component tool (430) on the rotary seat (340) is removed, and the laser cladding component tool (420) is installed. Then, the lifting plate (320) rises to a preset position, the driving device (130) is started, and the repair area (501) of the top cover (500) is subjected to laser cladding process processing. The control system plans the process route and controls the arc welding machine wire feeding speed and amount to meet the arc additive process requirements; The control system plans the process route, measures the thickness of the cladding layer in real time, compares it with the cladding layer thickness requirements, and controls the amount of powder fed.

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