Hydro-generator rotor roundness measuring device

Abstract

This invention relates to the field of intelligent roundness measurement technology, and more particularly to a roundness measurement device for a hydro-generator rotor. The device includes a testing platform with a hoisting and placement mechanism, a clamping and rotating mechanism, and a cleaning mechanism at its top. The hoisting and placement mechanism includes two clamping plates symmetrically arranged, each with a trapezoidal block fixedly connected to one end near each other. The clamping plates are used to clamp and fix the upper part of the rotor body. The clamping and rotating mechanism includes two fixed discs symmetrically arranged, each with a clamping seat fixedly connected to one end near each other. Each clamping seat has a trapezoidal block fixedly connected to one end near each other, and the clamping seats and clamping plates form a cylinder. This invention avoids the need for subsequent adjustments to the rotor body during placement, reducing time waste and improving placement efficiency, thereby increasing the efficiency of subsequent roundness testing of the rotor body.

Description

Technical Field

[0001] This invention relates to the field of intelligent circle measurement technology, and in particular to a circle measurement device for a hydro-generator rotor. Background Technology

[0002] The rotor of a large hydro-generator is a massive and incredibly heavy core rotating component. Its core function is to drive rotation through a prime mover (such as a water turbine), inducing alternating current in the stator windings to convert mechanical energy into electrical energy. After production, the rotor of a large hydro-generator needs to undergo roundness testing, which is performed using a laser distance sensor. Since the laser distance sensor is a type of intelligent sensor, it enables non-contact testing, achieving intelligent testing and ensuring product quality.

[0003] In existing technologies, when measuring the roundness of a large hydro-generator rotor, it is necessary to pass a hoisting rope through a trapezoidal hole on the rotor and then transfer the rotor to the testing device using a crane. Due to the lack of limiting the rotor during hoisting, the rotor may deflect during the transfer, requiring adjustment of the rotor's angle during placement to ensure it is perpendicular to the horizontal line. Because the rotor is large, this adjustment is laborious, resulting in slow overall placement efficiency and affecting subsequent testing efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing a rotor roundness measuring device for a hydro-generator.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a device for measuring the roundness of a hydro-generator rotor, comprising a testing platform, wherein a hoisting and placing mechanism, a clamping and rotating mechanism and a cleaning mechanism are provided at the top of the testing platform; The hoisting and placement mechanism includes clamping plates. Two clamping plates are symmetrically arranged, and each clamping plate is fixedly connected to a trapezoidal block at one end close to the other. The clamping plates are used to clamp and fix the upper part of the rotor body. The clamping and rotating mechanism includes two fixed disks symmetrically arranged. Each of the two fixed disks is fixedly connected to a clamping seat at one end close to each other. Each of the two clamping seats is fixedly connected to a trapezoidal block at one end close to each other. The clamping seat and the clamping plate form a cylinder. The trapezoidal blocks on both sides are adapted to the shape of the holes on the rotor body. The clamping plate and the clamping seat are used to clamp the entire rotor body.

[0006] Preferably, the hoisting and placement mechanism further includes a third motor fixedly connected to the rear side of the top of the test platform. The drive end of the third motor is fixedly connected to a drive shaft B, and the top of the drive shaft B is fixedly connected to a hollow seat B. The hollow seat B is rotatably connected to the test platform, and limit plates are symmetrically fixedly connected to both sides of the top of the test platform corresponding to the hollow seat B.

[0007] Preferably, a hydraulic rod is fixedly connected to the top of the hollow seat B, a horizontal plate is fixedly connected to the telescopic end of the hydraulic rod, a telescopic structure B is fixedly connected to the bottom of the horizontal plate, and the bottom of the telescopic structure B is fixedly connected to the hollow seat B.

[0008] Preferably, a fixing sleeve is fixedly connected to one end of the horizontal plate, and T-shaped plates are slidably arranged on both sides of the inner wall of the fixing sleeve. A first magnet is fixedly embedded at the bottom of one end of each of the two T-shaped plates that are close to each other. A bidirectional screw is rotatably connected to one side of the inner wall of the fixing sleeve. The bidirectional screw is threadedly connected to the T-shaped plate. A second motor is fixedly connected to one end of the fixing sleeve. The drive end of the second motor is fixedly connected to the bidirectional screw. A T-shaped groove is opened at the top of each of the two clamping plates. A second magnet is fixedly embedded at one end of each of the two T-grooves that are close to each other. The second magnet and the first magnet have opposite magnetic properties.

[0009] Preferably, the clamping and rotating mechanism includes fixed upright plates symmetrically fixedly connected to the top of the test platform. Each of the two fixed upright plates is fixedly connected to an electric push rod at one end away from each other. The telescopic ends of the two electric push rods are fixedly connected to hollow seats A. The two hollow seats A and two fixed discs are rotatably connected. Each of the two hollow seats A is fixedly connected to a first motor at one end of the outer side of the inner wall. The driving ends of the two first motors are fixedly connected to drive shafts A. The two drive shafts A and the two fixed discs are fixedly connected.

[0010] Preferably, each of the two hollow seats A is fixedly connected to a guide post at its bottom end, the two guide posts pass through the fixed upright plates on both sides, the outer walls of the two fixed discs are rotatably connected to a support frame, and the two sets of support frames are slidably connected to the test platform.

[0011] Preferably, the cleaning mechanism includes an electric cylinder fixedly connected to the middle of the top of the test platform, a cleaning box fixedly connected to the telescopic end of the electric cylinder, a scraper fixedly connected to the bottom of the inner wall of the cleaning box, telescopic structures A fixedly connected to both sides of the bottom of the cleaning box, both telescopic structures A being fixedly connected to the test platform, and a cleaning agent being provided inside the cleaning box.

[0012] Preferably, a U-shaped frame is fixedly connected to the front of the top of the test platform, a placement slot is opened at the rear end of the U-shaped frame, an electric slide rail is fixedly installed on the inner wall of the placement slot, a moving column is fixedly connected to the drive end of the electric slide rail, and a laser ranging sensor is fixedly connected to the rear end of the moving column.

[0013] Preferably, each of the two fixed discs has a limiting groove at one end away from the other, and the outer walls of the two hollow seats A are fixedly installed with limiting structures.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The set hoisting and placement mechanism can insert the trapezoidal block on the clamping plate into the trapezoidal hole on the upper part of the rotor body to complete the limiting of the rotor body, and clamp and fix it by the clamping plate to prevent the rotor body from deflecting during transfer, avoid the need to adjust the rotor body during subsequent placement, reduce the waste of time, improve placement efficiency, and thus improve the efficiency of subsequent testing of the roundness of the rotor body. With the clamping and rotating mechanism, when the rotor body arrives at the test platform, the trapezoidal block on the clamping seat can be inserted into the trapezoidal hole at the bottom of the rotor body, and the rotor body can be clamped and fixed by the clamping seat. Then, the clamping plate is limited by the fixed disc, so that the clamping plate and the clamping seat form a whole, ensuring the overall clamping effect, preventing shaking during subsequent rotation, and ensuring the accuracy of the test results. With the cleaning mechanism in place, the rotor body can be placed in the cleaning tank before testing, and the outer wall of the rotor body can be in contact with the scraper. Then, the rotor body is slowly rotated so that the outer wall of the rotor body comes into contact with the cleaning agent. With the help of the scraper, the outer wall of the rotor body is cleaned. After that, the rotor body is quickly rotated to shake off the cleaning agent, which facilitates subsequent testing and prevents impurities on the rotor body from affecting the test results, thus further ensuring the accuracy of the test results. With the setting of limit slots and limit structures, the clamping plate and clamping seat can be reset to the initial position after the test is completed, which facilitates subsequent material handling. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a rotor roundness measuring device for a hydro-generator according to the present invention; Figure 2 This is a side view of a rotor circle measuring device for a hydro-generator according to the present invention; Figure 3 This is a top view from another perspective of the rotor circle measuring device for a hydro-generator according to the present invention; Figure 4 This is a structural diagram of the fixing sleeve of a rotor roundness measuring device for a hydro-generator according to the present invention; Figure 5This is a structural diagram of the clamping plate and clamping seat of a rotor roundness measuring device for a hydro-generator according to the present invention; Figure 6 This is a structural diagram of the cleaning box of a rotor roundness measuring device for a hydro-generator according to the present invention; Figure 7 This is a structural diagram of the first magnet of a rotor roundness measuring device for a hydro-generator according to the present invention; Figure 8 This is a structural diagram of the second magnet in a rotor circularity measuring device for a hydro-generator according to the present invention; Figure 9 This is a diagram showing the limiting structure of a rotor roundness measuring device for a hydro-generator according to the present invention.

[0016] In the diagram: 1. Test platform; 2. Clamping plate; 3. T-shaped plate; 4. U-shaped frame; 5. Support frame; 6. Guide column; 7. Electric push rod; 8. Fixed upright plate; 9. Hollow seat A; 10. First motor; 11. Drive shaft A; 12. Hydraulic rod; 13. Horizontal plate; 14. Fixing sleeve; 15. T-slot; 16. Second motor; 17. Fixed disc; 18. Cleaning box; 19. Electric cylinder; 20. Telescopic structure A; 21. Third motor; 22. Drive shaft B; 23. Hollow seat B; 24. Limiting plate; 25. Telescopic structure B; 26. Placement slot; 27. Laser rangefinder sensor; 28. Moving column; 29. ​​Electric slide rail; 30. Bidirectional screw; 31. Trapezoidal block; 32. Rotor body; 33. Clamping seat; 34. Limiting slot; 35. Scraper; 36. First magnet; 37. Second magnet; 38. Limiting structure. Detailed Implementation

[0017] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] like Figures 1-9 The device for measuring the roundness of a hydro-generator rotor, as shown, includes a test platform 1. The top of the test platform 1 is equipped with a hoisting and placement mechanism, a clamping and rotating mechanism, and a cleaning mechanism. The hoisting and placement mechanism includes two clamping plates 2 symmetrically arranged. Each clamping plate 2 has a trapezoidal block 31 fixedly connected to one end close to the other. The clamping plates 2 are used to clamp and fix the upper part of the rotor body 32. The clamping and rotating mechanism includes two fixed disks 17 symmetrically arranged. Each fixed disk 17 has a clamping seat 33 fixedly connected to one end close to the other. Each clamping seat 33 has a trapezoidal block 31 fixedly connected to one end close to the other. The clamping seats 33 and clamping plates 2 form a cylinder. The trapezoidal blocks 31 on both sides are adapted to the shape of the trapezoidal holes on the rotor body 32. The clamping plates 2 and clamping seats 33 are used to clamp the entire rotor body 32. Intelligent testing is performed using intelligent sensors to ensure the accuracy of the test results.

[0019] like Figure 2 , Figure 3 As shown, the hoisting and placement mechanism also includes a third motor 21 fixedly connected to the rear side of the top of the test platform 1. A drive shaft B22 is fixedly connected to the drive end of the third motor 21, and a hollow seat B23 is fixedly connected to the top of the drive shaft B22. The hollow seat B23 is rotatably connected to the test platform 1. Limiting plates 24 are symmetrically fixedly connected to both sides of the hollow seat B23 at the top of the test platform 1. A hydraulic rod 12 is fixedly connected to the top of the hollow seat B23, and a horizontal plate 13 is fixedly connected to the telescopic end of the hydraulic rod 12. A telescopic structure B25 is fixedly connected to the bottom of the horizontal plate 13, and the bottom of the telescopic structure B25 is fixedly connected to the hollow seat B23. The third motor 21 rotates the drive shaft B22, thereby rotating the hollow seat B23, which in turn changes the angle of the hydraulic rod 12. When the hydraulic rod 12 is activated, the telescopic structure B25 limits the movement of the horizontal plate 13, ensuring stability.

[0020] like Figure 2 , Figure 4 , Figure 7 , Figure 8 As shown, a fixed sleeve 14 is fixedly connected to one end of the horizontal plate 13. T-shaped plates 3 are slidably arranged on both sides of the inner wall of the fixed sleeve 14. A first magnet 36 is fixedly embedded at the bottom of one end of the two T-shaped plates 3 that are close to each other. A bidirectional screw 30 is rotatably connected to one side of the inner wall of the fixed sleeve 14. The bidirectional screw 30 and the T-shaped plate 3 are threadedly connected. A second motor 16 is fixedly connected to one end of the fixed sleeve 14. The drive end of the second motor 16 is fixedly connected to the bidirectional screw 30. T-shaped grooves 15 are opened at the top of the two clamping plates 2. A second magnet 37 is fixedly embedded at one end of the two T-shaped grooves 15 that are close to each other. The second magnet 37 and the first magnet 36 have different magnetic properties. After the test is completed, insert the T-shaped plate 3 into the T-shaped groove 15 until it stops. Then start the second motor 16 to rotate the bidirectional screw 30. The thread effect of the bidirectional screw 30 causes the T-shaped plate 3 to move inward and the first magnet 36 and the second magnet 37 to be tightly attracted together, which makes it easier to move the clamping plate 2 outward and release the clamping limit on the rotor body 32.

[0021] like Figure 1 , Figure 2As shown, the clamping and rotating mechanism includes fixed upright plates 8 symmetrically fixedly connected to the top of the test platform 1. Electric push rods 7 are fixedly connected to one end of each of the two fixed upright plates 8, which are far apart from each other. Hollow seats A9 are fixedly connected to the telescopic ends of the two electric push rods 7. The two hollow seats A9 are rotatably connected to two fixed discs 17. A first motor 10 is fixedly connected to one end of the outer side of the inner wall of each of the two hollow seats A9. A drive shaft A11 is fixedly connected to the driving end of each of the two first motors 10. The two drive shafts A11 are fixedly connected to the two fixed discs 17. Guide posts 6 are fixedly connected to the bottom of each of the two hollow seats A9. The two guide posts 6 pass through the fixed upright plates 8 on both sides. Support frames 5 are rotatably connected to the outer walls of each of the two fixed discs 17. Both sets of support frames 5 are slidably connected to the test platform 1. The support frames 5 support the fixed discs 17, ensuring stability during rotation.

[0022] like Figure 2 , Figure 6 As shown, the cleaning mechanism includes an electric cylinder 19 fixedly connected to the top center of the test platform 1. A cleaning tank 18 is fixedly connected to the telescopic end of the electric cylinder 19. A scraper 35 is fixedly connected to the bottom of the inner wall of the cleaning tank 18. Telescopic structures A20 are fixedly connected to both sides of the bottom of the cleaning tank 18. Both telescopic structures A20 are fixedly connected to the test platform 1. Cleaning agent is placed inside the cleaning tank 18. The scraper 35 is made of plastic.

[0023] like Figure 1 , Figure 3 As shown, a U-shaped frame 4 is fixedly connected to the front top of the test platform 1. A placement slot 26 is provided at the rear end of the U-shaped frame 4. An electric slide rail 29 is fixedly installed on the inner wall of the placement slot 26. A moving column 28 is fixedly connected to the drive end of the electric slide rail 29. A laser rangefinder sensor 27 is fixedly connected to the rear end of the moving column 28. The rotor body 32 is tested through the laser rangefinder sensor 27. Since the laser rangefinder sensor 27 is a type of intelligent sensor, it can quickly transmit the measured data to a computer, and the computer can integrate and process the data to determine whether the roundness of the rotor body 32 meets the standard.

[0024] like Figure 3 , Figure 9 As shown, each of the two fixed discs 17 has a limiting groove 34 at one end away from each other, and a limiting structure 38 is fixedly installed on the outer wall of each of the two hollow seats A9. With the cooperation of the limiting structure 38 and the limiting groove 34, the clamping plate 2 and the clamping seat 33 can be reset to their initial positions, thus facilitating subsequent disassembly.

[0025] Working principle: First, the fixing sleeve 14 is on the outside. At this time, the trapezoidal block 31 on the clamping plate 2 is inserted into the trapezoidal hole on the upper part of the rotor body 32. Therefore, the upper part of the rotor body 32 can be clamped and fixed by the clamping plate 2. Then, the third motor 21 is started to rotate the drive shaft B22. When the telescopic structure B25 contacts the inner limiting plate 24, it stops. At this time, the horizontal plate 13 is perpendicular to the horizontal line, and the rotor body 32 is located directly above the test position. Then, the hydraulic rod 12 is started to move the horizontal plate 13 down and make the clamping plate 2 contact the lower part. The clamping seat 33 allows the rotor body 32 to reach the test position, preventing the rotor body 32 from deflecting during transfer and avoiding subsequent adjustments during placement, thus reducing time waste and improving placement efficiency. This, in turn, improves the efficiency of subsequent testing of the roundness of the rotor body 32. At this time, the synchronous controller controls the electric push rods 7 on both sides to push the hollow seat A9 inward. The hollow seat A9, along with the fixing disc 17 and the clamping seat 33, moves inward, thereby clamping and fixing the lower part of the rotor body 32 and securing it to the clamping plate. 2. Forming a whole, the rotor body 32 is clamped and fixed completely to prevent shaking during subsequent rotation and ensure the accuracy of test results. Then, the second motor 16 is started to rotate the bidirectional screw 30. The thread effect of the bidirectional screw 30 can move the T-shaped plate 3 outward, thereby separating the first magnet 36 and the second magnet 37. When the T-shaped plate 3 reaches the outermost part of the T-slot 15, the hydraulic rod 12 is started to move the T-shaped plate 3 upward. Then, the electric cylinder 19 is started to push the cleaning tank 18 upward and make the scraper 35 engage. The rotor body 32 is immersed in cleaning agent while touching the outer wall of the rotor body 32. Then, the first motor 10 on both sides is controlled by the synchronous controller to drive the drive shaft A11 to rotate, thereby rotating the fixed disc 17, the clamping seat 33 and the rotor body 32. Thus, the impurities on the outer wall of the rotor body 32 can be cleaned to ensure the accuracy of subsequent test results. After cleaning, the electric cylinder 19 is started in reverse to move the cleaning box 18 down, and then the rotor body 32 is rotated quickly to shake off the cleaning agent on the rotor body 32 to avoid affecting the subsequent test results. After the preliminary preparations are completed, the laser rangefinder 27 is turned on, and the rotor body 32 is slowly rotated. At this time, the laser rangefinder 27 tests the rotor body 32 and records the test results. The moving column 28 and the laser rangefinder 27 are moved by the electric slide rail 29, so different positions of the rotor body 32 can be tested, thereby improving the accuracy of the test and ensuring the quality of the product. Since the laser rangefinder 27 is an intelligent sensor, the test is made intelligent.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A hydrogenerator rotor roundness measuring device comprising a test platform (1), characterized in that: The test platform (1) is equipped with a hoisting and placement mechanism, a clamping and rotating mechanism and a cleaning mechanism at its top. The hoisting and placement mechanism includes clamping plates (2), two clamping plates (2) are symmetrically arranged, and trapezoidal blocks (31) are fixedly connected to one end of each clamping plate (2) close to each other. The clamping plates (2) are used to clamp and fix the upper part of the rotor body (32). The clamping and rotating mechanism includes a fixed disk (17), two fixed disks (17) are symmetrically arranged, and clamping seats (33) are fixedly connected to one end of each fixed disk (17) close to each other. Trapezoidal blocks (31) are fixedly connected to one end of each clamping seat (33) close to each other. The clamping seat (33) and the clamping plate (2) form a cylinder. The trapezoidal blocks (31) on both sides are adapted to the shape of the holes on the rotor body (32). The clamping plate (2) and the clamping seat (33) are used to clamp the entire rotor body (32).

2. A device for measuring the circle of a water turbine generator rotor according to claim 1, characterized in that: The hoisting and placement mechanism also includes a third motor (21) fixedly connected to the rear side of the top of the test platform (1). The drive end of the third motor (21) is fixedly connected to a drive shaft B (22). The top of the drive shaft B (22) is fixedly connected to a hollow seat B (23). The hollow seat B (23) and the test platform (1) are rotatably connected. Limiting plates (24) are symmetrically fixedly connected to both sides of the top of the test platform (1) corresponding to the hollow seat B (23).

3. A hydrogenerator rotor circle measuring device according to claim 2, characterized in that A hydraulic rod (12) is fixedly connected to the top of the hollow seat B (23), and a horizontal plate (13) is fixedly connected to the telescopic end of the hydraulic rod (12). A telescopic structure B (25) is fixedly connected to the bottom of the horizontal plate (13), and the bottom of the telescopic structure B (25) is fixedly connected to the hollow seat B (23).

4. A hydrogenerator rotor circle measuring device according to claim 3, characterized in that One end of the horizontal plate (13) is fixedly connected to a fixed sleeve (14). T-shaped plates (3) are slidably arranged on both sides of the inner wall of the fixed sleeve (14). A first magnet (36) is fixedly embedded at the bottom of one end of the two T-shaped plates (3). A bidirectional screw (30) is rotatably connected to one side of the inner wall of the fixed sleeve (14). The bidirectional screw (30) and the T-shaped plate (3) are threadedly connected. A second motor (16) is fixedly connected to one end of the fixed sleeve (14). The driving end of the second motor (16) is fixedly connected to the bidirectional screw (30). T-shaped grooves (15) are opened at the top of the two clamping plates (2). A second magnet (37) is fixedly embedded at one end of the two T-shaped grooves (15). The second magnet (37) and the first magnet (36) have different magnetic properties.

5. A hydrogenerator rotor circle measuring device according to claim 3, characterized in that The clamping and rotating mechanism includes fixed plates (8) symmetrically fixedly connected to the top of the test platform (1). Two fixed plates (8) are fixedly connected to electric push rods (7) at opposite ends. Hollow seats A (9) are fixedly connected to the telescopic ends of the two electric push rods (7). The two hollow seats A (9) and two fixed discs (17) are rotatably connected. A first motor (10) is fixedly connected to the outer side of the inner wall of the two hollow seats A (9). A drive shaft A (11) is fixedly connected to the drive end of the two first motors (10). The two drive shafts A (11) and two fixed discs (17) are fixedly connected.

6. A hydrogenerator rotor roundness measuring device according to claim 5, characterized in that The bottom ends of the two hollow seats A (9) are fixedly connected to guide columns (6), and the two guide columns (6) pass through the fixed upright plates (8) on both sides respectively. The outer walls of the two fixed discs (17) are rotatably connected to support frames (5), and the two sets of support frames (5) are slidably connected to the test platform (1).

7. A hydroelectric generator rotor circle measuring device as claimed in claim 1, wherein: The cleaning mechanism includes an electric cylinder (19) fixedly connected to the middle of the top of the test platform (1). The extension end of the electric cylinder (19) is fixedly connected to a cleaning box (18). A scraper (35) is fixedly connected to the bottom of the inner wall of the cleaning box (18). Telescopic structures A (20) are fixedly connected to both sides of the bottom of the cleaning box (18). Both telescopic structures A (20) are fixedly connected to the test platform (1). The cleaning box (18) is filled with cleaning agent.

8. A hydroelectric generator rotor circle measuring device according to claim 1, characterized in that: The test platform (1) has a U-shaped frame (4) fixedly connected to the front of the top. The U-shaped frame (4) has a placement slot (26) at the rear end. An electric slide rail (29) is fixedly installed on the inner wall of the placement slot (26). A moving column (28) is fixedly connected to the drive end of the electric slide rail (29). A laser rangefinder (27) is fixedly connected to the rear end of the moving column (28).

9. A hydroelectric generator rotor circle measuring device as claimed in claim 5, wherein: The two fixed discs (17) are provided with limit grooves (34) at one end away from each other, and the two hollow seats A (9) are fixedly installed with limit structures (38) on their outer walls.

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