A steam turbine blade detection device

Abstract

The present invention provides a steam turbine blade detection device, which relates to the technical field of steam turbine blade detection, and comprises a mounting plate, a driving mechanism is fixedly mounted on the top of the mounting plate, a clamping mechanism is fixedly mounted on the driving mechanism, and a detection mechanism is mounted on one side of the top of the mounting plate through a mounting bracket. The present invention achieves the fixation of the steam turbine impeller by driving the clamping mechanism through the driving mechanism mounted on the mounting plate, and at the same time cooperates with the detection mechanism arranged on the mounting plate by the mounting bracket to detect the blades on the steam turbine impeller one by one. The above invention can achieve the rapid fixation of the steam turbine impeller, and complete the detection of all blades on the impeller at the same time, and the operation is simple and convenient. Secondly, it not only saves the time of replacing the blades to be detected one by one, but also ensures that the blades can achieve stable and efficient detection.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine blade detection, in particular to a steam turbine blade detection device. Background Art

[0002] Steam turbine blades are important components that convert the energy of high-temperature, high-pressure steam into mechanical energy. They are subjected to a variety of complex effects such as high temperature, high pressure, huge centrifugal force, steam force, steam excitation force, corrosion and vibration. The aerodynamic performance, processing geometry, surface roughness, installation clearance and operating conditions of the blades have a significant impact on the efficiency and output of the steam turbine. Therefore, the inspection of the blades during use is crucial to the overall performance of the steam turbine.

[0003] With the large-scale use of steam turbines, the turbine blades on the market currently have differences in shape and size, which makes it difficult to fix most of the turbine blades during inspection. At the same time, it is impossible to quickly fix them according to the actual specifications of the blades; and it is impossible to achieve stable and efficient inspection of the blades on the entire impeller. Therefore, a turbine blade inspection device is proposed to address the above problems. Summary of the invention

[0004] The present invention provides a steam turbine blade detection device to solve at least one of the problems raised by the above background technology.

[0005] To solve the above technical problems, the present invention discloses a turbine blade detection device, including a mounting plate, a driving mechanism fixedly mounted on the top of the mounting plate, a clamping mechanism fixedly mounted on the driving mechanism, and a detection mechanism mounted on one side of the top of the mounting plate through a mounting bracket.

[0006] Preferably, a plurality of universal wheels are fixedly mounted on the peripheral side of the bottom of the mounting plate.

[0007] Preferably, the driving mechanism includes two support plates, which are respectively fixedly connected to the left and right sides of the top of the mounting plate, and the forward and reverse driving motor is fixedly installed on the right side wall of the mounting plate through a mounting seat, and one end of a first threaded rod with opposite left and right rotation directions rotates through the support plate and is fixedly connected to the output shaft of the forward and reverse driving motor, and the other end of the first threaded rod is rotatably connected to the inner wall of the support plate close to the left side of the mounting plate, and two threaded sleeves are threadedly connected to the first threaded rod at a distance from each other on the left and right sides, and the two threaded sleeves are respectively threadedly connected to the threaded segments with opposite rotation directions.

[0008] Preferably, the clamping mechanism includes two slide rails, and the two slide rails are fixedly installed on the top of the mounting plate with a front-to-rear spacing. The bottom of the first clamping plate is slidably connected to the left side of the two slide rails through two first sliders, and the bottom of the second clamping plate is slidably connected to the right side of the two slide rails through two second sliders. The bottoms of the first clamping plate and the second clamping plate are respectively fixedly connected to the tops of the two threaded sleeves in a one-to-one correspondence. The clamping components are respectively embedded in the grooves of the first clamping plate and the second clamping plate, and the adjusting component is arranged in the groove of the second clamping plate, and the adjusting component is used to drive the clamping component in the second clamping plate.

[0009] Preferably, the clamping assembly includes a mounting slip ring, which is rollingly connected in a groove on the second clamping plate, and the fixed ends of several first electric telescopic rods are fixedly connected along the circumferential spacing of the inner wall of the mounting slip ring, and the telescopic ends of several first electric telescopic rods are fixedly connected with an arc plate, and the inner wall of the arc plate is in contact with the rotating shaft of the impeller.

[0010] Preferably, the adjustment assembly includes a gear ring, which is fixedly connected to the side wall of the slip ring installed in the second clamping plate, and the support shaft rotates through the side wall of the groove in the second clamping plate, and one end of the support shaft is fixedly connected to a driving gear, which is meshed with the gear ring, and the other end of the support shaft is fixedly installed with an adjustment handle.

[0011] Preferably, the detection mechanism includes a second electric telescopic rod, a fixed end of the second electric telescopic rod is fixedly connected to the top of the mounting bracket, and the telescopic end of the second electric telescopic rod is hinged with a connecting rod, the lower end of the connecting rod is fixedly connected to a mounting frame, and electromagnets are respectively embedded on the front and rear inner walls of the mounting frame, the two iron fixed plates are symmetrically fixedly connected to the inner wall of the mounting frame through a number of springs, limit rods are fixedly installed on the left and right sides of the iron fixed plate, and the first detectors are respectively fixedly installed on the inner walls of the two iron fixed plates.

[0012] Preferably, it also includes a blade auxiliary detection mechanism, which is arranged on the left side wall of the mounting plate, and the blade auxiliary detection mechanism includes a drive box, the side wall of the drive box is fixedly connected to the left side wall of the mounting plate, the servo motor is fixedly connected to the inner wall of the drive box, and the output shaft of the servo motor is fixedly connected to a second threaded rod, one end of the second threaded rod is rotatably connected to the inner wall of the drive box, the slide is threadedly connected to the second threaded rod, the fixed plate 2 is fixedly connected to the top of the slide, and the fixed plate 2 is slidably connected to the slide groove at the top of the drive box, the shell one is slidably connected to the slide groove at the top of the drive box through the fixed plate three, and the second threaded rod runs through the two side walls of the shell one, and a connecting assembly is arranged in the shell one, and the two fixing assemblies are respectively rotatably connected to the inner walls of the fixed plate two and the fixed plate three, and the second detector is fixedly mounted on the top of the drive box through a fixed bracket.

[0013] Preferably, the connecting assembly includes a fixing sleeve, the top of the fixing sleeve is fixedly connected to the top inside the shell one, the threaded block is fixedly connected to the top inside the fixing sleeve by spring two, and the side wall of the threaded block is slidably connected to the inner wall of the fixing sleeve, the bottom of the threaded block is threadedly connected to the second threaded rod, the threaded adjustment rod is threadedly connected to the fixing plate three, the lower end of the threaded adjustment rod passes through the fixing plate three and is fixedly connected with a push rod, and the lower end of the push rod slides through the top of the shell one to contact the top of the threaded block.

[0014] Compared with the prior art, the steam turbine blade detection device provided by the present invention has the following beneficial effects:

[0015] 1. The above-mentioned steam turbine blade detection device can realize the rapid fixation of the steam turbine impeller as a whole by adding a driving mechanism in conjunction with a clamping mechanism, and can detect all blades on the impeller at the same time. The operation is simple and convenient, and the stability and accuracy of blade detection are effectively improved.

[0016] 2. When the above-mentioned steam turbine blade detection device detects the blades through the detection device, it not only saves the time of replacing the blades to be detected one by one, but also ensures that the blades can be detected stably and efficiently, and it is convenient and fast, effectively improving the detection work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a steam turbine blade detection device provided by an embodiment of the present invention;

[0019] Figure 2 A right side structural schematic diagram of a steam turbine blade detection device provided in an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of a top view of the detection mechanism provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the structure of an impeller provided in an embodiment of the present invention;

[0022] Figure 5 A left-side structural schematic diagram of a blade auxiliary detection mechanism provided in an embodiment of the present invention;

[0023] Figure 6 A schematic structural diagram of the connection between the connecting assembly provided in an embodiment of the present invention and the second threaded rod.

[0024] Reference numerals:

[0025] 1. Mounting plate; 2. Driving mechanism; 3. Clamping mechanism; 4. Detection mechanism; 5. Mounting bracket; 6. Universal wheel; 7. Support plate; 8. Forward and reverse driving motor; 9. Mounting seat; 10. First threaded rod; 11. Threaded sleeve; 12. Slide rail; 13. First clamping plate; 14. First slider; 15. Second clamping plate; 16. Second slider; 17. Clamping assembly; 18. Groove; 19. Adjustment assembly; 20. Mounting slip ring; 21. First electric telescopic rod; 22. Arc plate; 23. Impeller; 24. Rotating shaft 1; 25. Gear ring; 26. Support shaft; 27. Driving gear; 28. Adjustment handle; 29. ​​Second electric telescopic rod; 30. Connecting rod; 31. Mounting frame; 32. Electromagnet; 3 3. Iron fixed plate one; 34. Spring one; 35. Limit rod; 36. First detector; 37. Blade auxiliary detection mechanism; 38. Drive box; 39. Servo motor; 40. Second threaded rod; 41. Slide; 42. Fixed plate two; 43. Slide; 44. Shell one; 45. Fixed plate three; 46. Connecting assembly; 47. Fixed assembly; 48. Second detector; 49. Fixed bracket; 50. Fixed sleeve; 51. Threaded block; 52. Spring two; 53. Threaded adjustment rod; 54. Push rod; 55. Shell two; 56. Drive motor; 57. Third threaded rod; 58. Upper pressure plate; 59. Threaded sleeve; 60. Lower pressure plate; 61. Rotating shaft two; 62. Driving hand wheel; 63. Electric telescopic rod three. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The present invention provides the following embodiments

[0028] Example 1

[0029] The embodiment of the present invention provides a steam turbine blade detection device, such as Figure 1-Figure 4 As shown, it includes a mounting plate 1, a driving mechanism 2 is fixedly mounted on the top of the mounting plate 1, a clamping mechanism 3 is fixedly mounted on the driving mechanism 2, and a detection mechanism 4 is mounted on one side of the top of the mounting plate 1 through a mounting bracket 5.

[0030] Preferably, a plurality of universal wheels 6 are fixedly mounted on the peripheral side of the bottom of the mounting plate 1 .

[0031] Preferably, the driving mechanism 2 includes two support plates 7, which are respectively fixedly connected to the left and right sides of the top of the mounting plate 1, and the forward and reverse driving motor 8 is fixedly installed on the right side wall of the mounting plate 1 through a mounting seat 9. One end of a first threaded rod 10 with opposite left and right rotation directions rotates through the support plate 7 and is fixedly connected to the output shaft of the forward and reverse driving motor 8, and the other end of the first threaded rod 10 is rotatably connected to the inner wall of the support plate 7 close to the left side of the mounting plate 1, and two threaded sleeves 11 are threadedly connected to the first threaded rod 10 at a distance from each other, and the two threaded sleeves 11 are respectively threadedly connected to the threaded segments with opposite rotation directions.

[0032] Preferably, the clamping mechanism 3 includes two slide rails 12, and the two slide rails 12 are fixedly installed on the top of the mounting plate 1 with a front-to-rear spacing. The bottom of the first clamping plate 13 is slidably connected to the left side of the two slide rails 12 through two first sliders 14, and the bottom of the second clamping plate 15 is slidably connected to the right side of the two slide rails 12 through two second sliders 16. The bottoms of the first clamping plate 13 and the second clamping plate 15 are respectively fixedly connected to the tops of the two threaded sleeves 11 in a one-to-one correspondence. The clamping assembly 17 is respectively embedded in the groove 18 of the first clamping plate 13 and the second clamping plate 15, and the adjusting assembly 19 is arranged in the groove 18 of the second clamping plate 15, and the adjusting assembly 19 is used to drive the clamping assembly 17 in the second clamping plate 15.

[0033] Preferably, the clamping assembly 17 includes a mounting slip ring 20, which is rollingly connected in a groove 18 on the second clamping plate 15, and the fixed ends of a plurality of first electric telescopic rods 21 are fixedly connected along a circumferential spacing distance of an inner wall of the mounting slip ring 20, and the telescopic ends of a plurality of first electric telescopic rods 21 are fixedly connected with an arc plate 22, and the inner wall of the arc plate 22 is in contact with and connected to a rotating shaft 24 of an impeller 23.

[0034] The working principle and beneficial effects of the above technical solution are:

[0035] The main structure of the steam turbine blade detection device of the present invention is provided with a mounting plate 1, a driving mechanism 2, a clamping mechanism 3, a mounting bracket 5 and a detection mechanism 4. The driving mechanism 2 installed on the mounting plate 1 drives the clamping mechanism 3 to fix the steam turbine impeller 23, and at the same time cooperates with the detection mechanism 4 set on the mounting plate 1 through the mounting bracket 5 to detect the blades to be detected on the steam turbine impeller 23 one by one, thereby realizing reliable and convenient detection of the blades. The steam turbine blade detection device is convenient to realize the flexible movement of the detection device through a plurality of universal wheels 6 set on the bottom circumference of the mounting plate 1, and can be applied to different working positions and detection environments. Secondly, through the set driving mechanism 2, driven by the forward and reverse driving motor 8 installed on the mounting seat 9, the first threaded rod 10 can realize forward rotation and reverse rotation, and at the same time, the two threaded sleeves 11 threadedly connected to the first threaded rod 10 with opposite forward and reverse rotation directions can realize inward or outward movement, thereby driving the clamping mechanism 3 to quickly fix the entire impeller 23 when the steam turbine blade is detected, and the operation is convenient, so as to adapt to the detection of blades of different specifications.

[0036] When the turbine blade detection mechanism 4 detects the blade, the driving mechanism 2 drives the two threaded sleeves 11 to move inward or outward, and the two slide rails 12 are fixedly installed on the top of the mounting plate 1 at a front-to-back spacing. Under the action of the first slider 14 and the second slider 16, the first clamping plate 13 and the second clamping plate 15 are driven by the two threaded sleeves 11 to move left and right along the two slide rails 12. At the same time, the clamping assembly 17 arranged on the first clamping plate 13 and the second clamping plate 15, when the blade to be detected is detected, the clamping assembly 17 located on the first clamping plate 13, and the plurality of first electric telescopic rods 21 fixedly connected along the circumferential spacing of the inner wall of the mounting slip ring 20 drive the arc plate 22 to contract, so that there is enough space inside the mounting slip ring 20 for To fix the impeller 23, one end of the rotating shaft 24 on the impeller 23 is placed on the arc plate 22 inside the mounting slip ring 20, and a plurality of first electric telescopic rods 21 drive the arc plate 22 to extend until the inner wall of the arc plate 22 is tightly fitted with the rotating shaft 24, so that one side of the impeller 23 is fixed to the first clamping plate 13. At this time, the first clamping plate 13 slides inward along the slide rail 12, so that the clamping assembly 17 on the second clamping plate 15 gradually approaches the other side of the rotating shaft 24 on the impeller 23. When the first clamping plate 13 and the second clamping plate 15 reach the specified position, the clamping assembly 17 on the second clamping plate 15 cooperates with the first clamping plate 13 to complete the reliable fixation of the impeller 23 and ensure that the blades on the impeller 23 are in the position to be detected, and then cooperates with the adjustment assembly 19 and the detection mechanism 4 to realize the detection of the blades to be detected on the impeller 23. Secondly, when the inspection is completed, it is only necessary to reset the clamping assembly 17 on the first clamping plate 13 or the second clamping plate 15 so that the rotating shaft 24 of the impeller 23 is separated from the clamping assembly 17, and the driving motor of the driving mechanism 2 is used to separate the first clamping plate 13 and the second clamping plate 15. At this time, the operator only needs to remove the impeller 23 from the clamping assembly 17 on one side to complete the convenient and efficient inspection of the blades on the entire impeller 23.

[0037] The driving mechanism 2 of the present invention cooperates with the clamping mechanism 3 to achieve rapid fixation of the turbine impeller 23 as a whole, and at the same time detect all blades to be detected on the impeller 23. The operation is simple and convenient, which effectively improves the stability and accuracy of the blade detection process and effectively improves the working efficiency of the turbine blade detection device.

[0038] Example 2

[0039] On the basis of Example 1, Figure 1 , Figure 3-Figure 4As shown, the adjustment assembly 19 includes a gear ring 25, which is fixedly connected to the side wall of the slip ring 20 installed in the second clamping plate 15, and a support shaft 26 rotates through the side wall of the groove 18 in the second clamping plate 15, and one end of the support shaft 26 is fixedly connected to a driving gear 27, and the driving gear 27 is meshed with the gear ring 25, and the other end of the support shaft 26 is fixedly installed with an adjustment handle 28.

[0040] Preferably, the detection mechanism 4 includes a second electric telescopic rod 29, the fixed end of the second electric telescopic rod 29 is fixedly connected to the top of the mounting bracket 5, and the telescopic end of the second electric telescopic rod 29 is hinged with a connecting rod 30, the lower end of the connecting rod 30 is fixedly connected to a mounting frame 31, and electromagnets 32 are respectively embedded on the front and rear inner walls of the mounting frame 31, the two iron fixed plates 33 are symmetrically fixedly connected to the inner wall of the mounting frame 31 through a plurality of springs 34, and limiting rods 35 are fixedly installed on the left and right sides of the iron fixed plates 33, and the inner walls of the two iron fixed plates 33 are respectively fixedly installed with first detectors 36.

[0041] The working principle and beneficial effects of the above technical solution are:

[0042] The above-mentioned adjustment mechanism set in the turbine blade detection device can be used to detect all the blades to be detected on the impeller 23 one by one, avoiding the time loss caused by replacing the blades to be detected one by one, and reducing the work intensity of the operator. When the detection mechanism starts to detect the blades on the impeller 23, by rotating the adjustment handle 28, the support shaft 26 is driven to rotate along the side wall of the second clamping plate 15, and the driving gear 27 fixedly connected to the support shaft 26 is driven to rotate. The driving gear 27 is meshed with the gear ring 25 to drive, so that the installation slip ring 20 fixedly connected to the driving gear 27 is rotated along the groove 18 of the second clamping plate 15. Since the clamping assembly 17 on the first clamping plate 13 and the second clamping plate 15 fixes the impeller 23, the position of the blades to be detected on the impeller 23 can be replaced one by one by rotating the adjustment handle 28, so as to cooperate well with the detection mechanism 4 to detect each blade to be detected. Then, when the blade to be detected is at the detection position, the electric telescopic rod 2 in the detection mechanism 4 is telescoped to drive the mounting frame 31 to move up and down. At this time, the electromagnets 32 located on the inner walls on both sides of the mounting frame 31 are then symmetrically fixed to the two iron fixing plates 33 on the inner walls of the mounting frame 31 by a plurality of springs 34 and adsorbed by the electromagnets 32, so that the space in the mounting frame 31 is expanded, and the blade can be better entered into the mounting frame 31 for blade detection. When the upper end of the blade completely enters the mounting frame 31, the electromagnet 32 ​​is powered off, and the two iron fixing plates 33 are moved closer to each other by the elastic force of the spring 34, so that the first detector 36 fixedly installed on the iron fixing plate 33 can be close to the surface of the blade to be detected to complete the detection. At the same time, the limit rods 35 fixedly installed on both sides of the two iron fixing plates 33 can provide a buffer for the spring 34. The first detector 36 is prevented from being too close to the blade surface, thereby causing damage to the first detector 36, and at the same time, the accuracy of the first detector 36 in detecting the blade is ensured; when the detection of the current blade is completed, the electromagnet 32 ​​is energized, so that the two iron fixing plates 33 are close to the inner walls on both sides of the mounting frame 31, and then the second electric telescopic rod 29 drives the mounting frame 31 to separate from the detected blade, completing the detection of the single blade, and then the adjustment handle 28 is rotated to make the next blade to be detected be located at the detection position, and the detection mechanism 4 completes the detection of the next blade; wherein, the above-mentioned first detector 36 can be an ultrasonic detector, which uses the propagation characteristics of ultrasonic waves in the medium to detect defects inside the blade, and is suitable for detecting cracks, inclusions and other defects inside the blade, and has the advantages of non-contact, damage-free, and fast detection speed. It is widely used in non-destructive testing of turbine blades and can accurately judge the integrity and performance of the blades.

[0043] By cooperating the adjusting mechanism with the detection mechanism 4 in the steam turbine blade detection device, not only the time of replacing the blades to be detected one by one is saved, but also the blades can be stably and efficiently detected. It is not only convenient and fast, but also effectively ensures the working efficiency of the steam turbine blade detection device.

[0044] Example 3

[0045] On the basis of Example 1 or 2, Figure 5-Figure 6 As shown, it also includes a blade auxiliary detection mechanism 37, which is arranged on the left side wall of the mounting plate 1, and the blade auxiliary detection mechanism 37 includes a drive box 38, the side wall of the drive box 38 is fixedly connected to the left side wall of the mounting plate 1, and a servo motor 39 is fixedly connected to the inner wall of the drive box 38, and the output shaft of the servo motor 39 is fixedly connected to a second threaded rod 40, one end of the second threaded rod 40 is rotatably connected to the inner wall of the drive box 38, and a slide 41 is threadedly connected to the second threaded rod 40. Fixed plate two 42 is fixedly connected to the top of the slide 41, and fixed plate two 42 is slidably connected in the slide groove 43 at the top of the drive box 38, shell one 44 is slidably connected in the slide groove 43 at the top of the drive box 38 through fixed plate three 45, and the second threaded rod 40 passes through the two side walls of shell one 44, and a connecting component 46 is arranged in shell one 44, two fixing components 47 are rotatably connected to the inner walls of fixed plate two 42 and fixed plate three 45 respectively, and the second detector 48 is fixedly installed on the top of the drive box 38 through a fixing bracket 49.

[0046] Preferably, the connecting assembly 46 includes a fixing sleeve 50, the top of which is fixedly connected to the top inside the shell 1 44, a threaded block 51 is fixedly connected to the top inside the fixing sleeve 50 through a spring 2 52, and a side wall of the threaded block 51 is slidably connected to an inner wall of the fixing sleeve 50, the bottom of the threaded block 51 is threadedly connected to the second threaded rod 40, a threaded adjustment rod 53 is threadedly connected to the fixing plate 3 45, the lower end of the threaded adjustment rod 53 passes through the fixing plate 3 45 and is fixedly connected with a push rod 54, and the lower end of the push rod 54 slides through the top of the shell 1 44 to contact the top of the threaded block 51.

[0047] Among them, preferably, the fixed component 47 includes a shell 55, and the shell 55 is fixedly connected to the inner wall of the fixed plate 42 through a rotating shaft 61. The top of the shell 55 is fixedly connected to a driving motor 56, and the two ends of the third threaded rod 57 are respectively connected to the output shaft of the driving motor 56 and the bottom of the shell 55, and the upper pressure plate 58 is threadedly connected to the third threaded rod 57 through a threaded sleeve 59, and one side of the lower pressure plate 60 is fixedly installed on the lower part of the outer side wall of the shell 55, and one end of the rotating shaft 61 is fixedly installed with a driving hand wheel 62, and the electric telescopic rod three 63 is embedded in the side wall of the fixed plate 42.

[0048] The working principle and beneficial effects of the above technical solution are:

[0049] By setting a blade auxiliary detection mechanism 37 on the turbine blade detection device, the blades on the impeller 23 can be detected more precisely and efficiently, avoiding the inability to complete the detection and evaluation of blades in a special specification or state, thereby affecting the use of the entire turbine blade. When the blade auxiliary detection mechanism 37 is working, the servo motor 39 set on the inner wall of the drive box 38 starts to work, driving the third threaded rod 57 fixedly connected to rotate synchronously. At this time, the rotation of the third threaded rod 57 can realize the threadedly connected slide 41 under the action of the fixed plate 2 42 and the fixed plate 3 45. The slide 43 at the top of the drive box 38, and the clockwise rotation of the servo motor 39 first rotates the threaded adjustment rod 53 threadedly connected to the fixed plate 3 45 downward. As the threaded adjustment rod 53 continues to move downward, the top rod 54 at the bottom of the threaded adjustment rod 53 is driven to rotate synchronously. The first screw rod 54 is moved downward step by step until the bottom of the push rod 54 contacts the top of the threaded block 51, so that the bottom of the threaded block 51 is meshed with the second threaded rod 40 for transmission. At this time, the housing 1 44 is moved left and right under the action of the fixing sleeve 50 and the threaded block 51, thereby completing the adjustment of the horizontal distance between the fixing plate 2 42 and the fixing plate 3 45. When the position adjustment of the fixing plate 2 42 and the fixing plate 3 45 is completed, the threaded adjustment rod 53 is rotated upward. At this time, the threaded adjustment rod 53 drives the push rod 54 to move upward along the top of the fixing sleeve 50. At this time, the bottom of the push rod 54 is out of contact with the top of the threaded block 51. The second spring 52 contracts, and under the action of the elastic force of the second spring 52, the bottom of the threaded block 51 is disengaged from the second threaded rod 40. At this time, with the rotation of the second threaded rod 40, the left and right movement of the slide 41 is completed. At the same time, the second fixing plate 42 and the third fixing plate 45 located on the top of the slide 41 cooperate with the fixing assembly 47 to realize the left and right movement of the blade to be detected, so as to cooperate with the second detector 48 on the blade auxiliary detection mechanism 37 to perform fine detection on various positions of the surface of the blade to be detected; at the same time, the fixing assembly 47 located on the second fixing plate 42 is driven by the driving motor 56 to drive the third fixing plate 45 to move to the left and right. The threaded rod 57 rotates in the shell 2 55. At this time, the upper pressure plate 58 threadedly connected to the third threaded rod 57 through the threaded sleeve 59 can be rotated up and down. As the upper pressure plate 58 and the lower pressure plate 60 continue to approach each other, one end of the blade is fixed. As the above-mentioned fixing plate 2 42 and fixing plate 3 45 are positioned close to each other, the fixing component 47 located on the fixing plate 3 45 fixes the other end of the blade to be detected, thereby achieving reliable fixation of the blade to be detected on the blade auxiliary detection mechanism 37, and at the same time better meeting the fine detection of different positions of the detected blade, thereby ensuring the reliability of the auxiliary transfer device.

[0050] The fixed assembly 47 provided by the above-mentioned blade auxiliary detection mechanism 37 can quickly and conveniently install and fix the blade to be detected on the detection mechanism 4. Since the shell 2 55 of the fixed assembly 47 is connected to the inner wall of the fixed plate 2 42 and the fixed plate 3 45 through the rotating shaft 2 61, the driving hand wheel 62 fixedly installed at one end of the rotating shaft 2 61 drives the rotating shaft 2 61 to rotate when it is necessary to realize the rotation of the blade to be detected forward and backward in the horizontal direction, so that the fixed assembly 47 on the fixed plate 2 42 is rotated, and the fixed assembly 47 on the fixed plate 3 45 is cooperated to complete the rotation of the blade to be detected forward and backward in the horizontal direction, so that it can be better matched. The second detector 48 performs all-round and multi-angle detection on the blade surface. Secondly, the electric telescopic rod three 63 embedded in the side wall of the fixed plate two 42 is extended and retracted, so that after the driving hand wheel 62 rotates to a detection position, the telescopic end of the electric telescopic rod three 63 and the groove of the driving hand wheel 62 cooperate to achieve stopping, thereby realizing refined and reliable detection of the blades. The above meets the requirements of the turbine blade detection device for refined detection and evaluation of blades in different specifications and states, and also greatly reduces the work intensity of the staff, ensures the detection efficiency of the turbine blade detection device, and effectively improves the stability and reliability of the detection of the turbine blade detection device.

[0051] Example 4

[0052] A steam turbine blade detection device described on the basis of embodiment 1 or 2 further includes a blade performance detection device for detecting the working state of the blade during the operation of the steam turbine impeller 23, and the blade performance detection device includes:

[0053] A speed sensor, used to detect the speed of a rotating shaft 24 to which the turbine impeller 23 is connected;

[0054] A vortex flowmeter, used to detect the steam flow through the turbine impeller 23;

[0055] Wind speed sensor 1, used to detect the conveying speed of the steam flow before the steam turbine impeller 23;

[0056] Wind speed sensor 2, used to detect the flow speed of the steam flow after passing through the turbine impeller 23;

[0057] A controller and an alarm, wherein the controller is electrically connected to the rotation speed sensor, the vortex flowmeter, the wind speed sensor 1, the wind speed sensor 2 and the alarm, and the controller controls the operation of the alarm based on the rotation speed sensor, the vortex flowmeter, the wind speed sensor 1 and the wind speed sensor 2.

[0058] Preferably, the controller controls the alarm to sound based on the rotation speed sensor, the vortex flowmeter, the wind speed sensor 1 and the wind speed sensor 2, including:

[0059] According to the following formula, the detection values ​​obtained by the speed sensor, the vortex flowmeter, the wind speed sensor 1 and the wind speed sensor 2, the working state evaluation coefficient W of the blades of the steam turbine impeller during operation is calculated, and the controller compares the current blade working state evaluation coefficient W of the steam turbine impeller during operation with the preset blade working state evaluation coefficient range. If the current blade working state evaluation coefficient W of the steam turbine impeller during operation is not within the preset blade working state evaluation coefficient range, the controller controls the alarm to sound an alarm:

[0060] ; Wherein, W is the blade working condition evaluation coefficient of the turbine impeller during operation, is the reliability index of the turbine blade operating status. is the function corresponding to the reliability index of the turbine blade operating status, is the material density of the turbine blade, is the effective cross-sectional area of ​​the turbine blade, is the detection value of the rotation speed of the rotating shaft 24 connected to the turbine impeller 23 by the rotation speed sensor, L is the actual height of the working part of the turbine blade, is the acceleration due to gravity (the value is 9.81 m / s² ), is the single-side surface area of ​​the turbine blade, is the detection value of the steam flow rate passing through the turbine impeller 23 by the vortex flowmeter, is the partial steam inlet degree when the steam turbine is entering the steam turbine. is the number of blades on the turbine impeller 23, is the detected value of the steam flow velocity before the steam turbine impeller 23 by the wind speed sensor, is the detection value of the steam flow velocity after passing through the turbine impeller 23 by the wind speed sensor 2, is the shear modulus of the turbine blade material, is the Poisson’s ratio of the turbine blade material.

[0061] The beneficial effects of the above technical scheme are as follows: based on the detection values ​​of the speed sensor, vortex flowmeter, wind speed sensor 1 and wind speed sensor 2, and taking into account the material density of the turbine blades and the actual height of the working part, the effective cross-sectional area of ​​the turbine blades, the rotation speed of the rotating shaft 24 connected to the turbine impeller 23, the single-sided surface area of ​​the turbine blades, the steam flow through the turbine impeller 23, the partial steam inlet degree when the turbine is inlet, the number of blades on the turbine impeller 23, the steam flow transport speed before and after the turbine impeller 23, the shear modulus of the turbine blade material, and the Poisson's ratio of the turbine blade material, the working state evaluation coefficient W of the blades of the turbine impeller during operation is calculated, so that the calculation result is more accurate and reliable.

[0062] The controller controls the operation of the speed sensor, vortex flowmeter, wind speed sensor 1, wind speed sensor 2 and alarm. When the actual blade working state evaluation coefficient W is not within the preset blade working state evaluation coefficient range, the controller controls the alarm to sound an alarm, thereby reminding the staff to inspect the turbine blades in time, and perform maintenance on the turbine blades according to the actual inspection results to maintain the normal working state of the turbine blades, effectively improving the service life of the turbine blades, and further meeting the use requirements of the turbine blades for operational reliability and stability. By real-time monitoring of the working state of the turbine blades during operation, not only the detection efficiency of the turbine blades is increased, but also the safe operation of the turbine is guaranteed.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steam turbine blade detection device, characterized in that: It comprises a mounting plate (1), a driving mechanism (2) is fixedly mounted on the top of the mounting plate (1), a clamping mechanism (3) is fixedly mounted on the driving mechanism (2), and a detection mechanism (4) is mounted on one side of the top of the mounting plate (1) via a mounting bracket (5); A blade performance detection device is used to detect the working state of the blade during the operation of the steam turbine impeller (23), and the blade performance detection device comprises: A rotation speed sensor for detecting the rotation speed of a rotating shaft (24) to which a steam turbine impeller (23) is connected; A vortex flowmeter for detecting the steam flow passing through the turbine impeller (23); Wind speed sensor 1, used to detect the conveying speed of the steam flow before passing through the steam turbine impeller (23); A second wind speed sensor is used to detect the flow speed of the steam flow after passing through the steam turbine impeller (23); A controller and an alarm, wherein the controller is electrically connected to the rotation speed sensor, the vortex flowmeter, the wind speed sensor 1, the wind speed sensor 2 and the alarm, and the controller controls the alarm to work based on the rotation speed sensor, the vortex flowmeter, the wind speed sensor 1 and the wind speed sensor 2; The controller controls the alarm to alarm based on the rotation speed sensor, the vortex flowmeter, the wind speed sensor 1 and the wind speed sensor 2, including: According to the following formula, the detection values ​​obtained by the speed sensor, the vortex flowmeter, the wind speed sensor 1 and the wind speed sensor 2, the working state evaluation coefficient W of the blades of the steam turbine impeller during operation is calculated, and the controller compares the current blade working state evaluation coefficient W of the steam turbine impeller during operation with the preset blade working state evaluation coefficient range. If the current blade working state evaluation coefficient W of the steam turbine impeller during operation is not within the preset blade working state evaluation coefficient range, the controller controls the alarm to sound an alarm: ; Wherein, W is the blade working condition evaluation coefficient of the turbine impeller during operation, is the reliability index of the turbine blade operating status. is the function corresponding to the reliability index of the turbine blade operating status, is the material density of the turbine blade, is the effective cross-sectional area of ​​the turbine blade, is the detection value of the rotation speed of the rotating shaft (24) connected to the turbine impeller (23) by the rotation speed sensor, L is the actual height of the working part of the turbine blade, is the acceleration due to gravity, is the single-side surface area of ​​the turbine blade, is the detection value of the steam flow rate passing through the turbine impeller (23) by the vortex flowmeter, is the partial steam inlet degree when the steam turbine is entering the steam turbine. is the number of blades on the turbine impeller (23), is the detected value of the steam flow transport speed before the wind speed sensor passes through the steam turbine impeller (23), is the detection value of the steam flow velocity after passing through the steam turbine impeller (23) by the second pair of wind speed sensors, is the shear modulus of the turbine blade material, is the Poisson’s ratio of the turbine blade material.

2. A steam turbine blade detection device according to claim 1, characterized in that: A plurality of universal wheels (6) are fixedly mounted on the peripheral side of the bottom of the mounting plate (1).

3. A steam turbine blade detection device according to claim 1, characterized in that: The driving mechanism (2) comprises two support plates (7), the two support plates (7) are respectively fixedly connected to the left and right sides of the top of the mounting plate (1); the forward and reverse driving motor (8) is fixedly mounted on the right side wall of the mounting plate (1) via a mounting seat (9); one end of a first threaded rod (10) with opposite left and right rotation directions rotates through the support plate (7) and is fixedly connected to the output shaft of the forward and reverse driving motor (8); and the other end of the first threaded rod (10) is rotatably connected to the inner wall of the support plate (7) close to the left side of the mounting plate (1); two threaded sleeves (11) are threadedly connected to the first threaded rod (10) at a distance from each other, and the two threaded sleeves (11) are respectively threadedly connected to the threaded sections with opposite rotation directions.

4. A steam turbine blade detection device according to claim 1, characterized in that: The clamping mechanism (3) comprises two slide rails (12), the two slide rails (12) are fixedly mounted on the top of the mounting plate (1) at a front-to-rear spacing, the bottom of the first clamping plate (13) is slidably connected to the left side of the two slide rails (12) through two first sliders (14), the bottom of the second clamping plate (15) is slidably connected to the right side of the two slide rails (12) through two second sliders (16), the bottoms of the first clamping plate (13) and the second clamping plate (15) are respectively fixedly connected to the tops of the two threaded sleeves (11) in a one-to-one correspondence, two clamping assemblies (17) are respectively embedded in the grooves (18) of the first clamping plate (13) and the second clamping plate (15), the adjusting assembly (19) is arranged in the groove (18) of the second clamping plate (15), and the adjusting assembly (19) is used to drive the clamping assembly (17) in the second clamping plate (15).

5. A steam turbine blade detection device according to claim 4, characterized in that: The clamping assembly (17) comprises a mounting slip ring (20), the mounting slip ring (20) being rollingly connected in a groove (18) on the second clamping plate (15), the fixed ends of a plurality of first electric telescopic rods (21) being fixedly connected at a circumferential spacing along the inner wall of the mounting slip ring (20), and the telescopic ends of the plurality of first electric telescopic rods (21) being fixedly connected with an arc plate (22), the inner wall of the arc plate (22) being in contact with a rotating shaft (24) of a turbine impeller (23).

6. A steam turbine blade detection device according to claim 5, characterized in that: The adjustment assembly (19) comprises a gear ring (25), wherein the gear ring (25) is fixedly connected to the side wall of the sliding ring (20) installed in the second clamping plate (15), and a support shaft (26) rotates and passes through the side wall of the groove (18) in the second clamping plate (15), and one end of the support shaft (26) is fixedly connected to a driving gear (27), and the driving gear (27) is meshed with the gear ring (25), and the other end of the support shaft (26) is fixedly installed with an adjustment handle (28).

7. A steam turbine blade detection device according to claim 1, characterized in that: The detection mechanism (4) comprises a second electric telescopic rod (29), the fixed end of the second electric telescopic rod (29) is fixedly connected to the top of the mounting bracket (5), and the telescopic end of the second electric telescopic rod (29) is hinged with a connecting rod (30), the lower end of the connecting rod (30) is fixedly connected to a mounting frame (31), electromagnets (32) are respectively embedded on the front and rear inner walls of the mounting frame (31), two iron fixing plates (33) are symmetrically fixedly connected to the inner wall of the mounting frame (31) through a plurality of springs (34), limit rods (35) are fixedly installed on the left and right sides of the iron fixing plate (33), and first detectors (36) are respectively fixedly installed on the inner walls of the two iron fixing plates (33).

8. The steam turbine blade detection device according to claim 1, characterized in that: The invention also comprises a blade auxiliary detection mechanism (37), wherein the blade auxiliary detection mechanism (37) is arranged on the left side wall of the mounting plate (1), and the blade auxiliary detection mechanism (37) comprises a drive box (38), wherein the side wall of the drive box (38) is fixedly connected to the left side wall of the mounting plate (1), a servo motor (39) is fixedly connected to the inner wall of the drive box (38), and an output shaft of the servo motor (39) is fixedly connected to a second threaded rod (40), one end of the second threaded rod (40) is rotatably connected to the inner wall of the drive box (38), a slide (41) is threadedly connected to the second threaded rod (40), and a fixing plate (41) is fixedly connected to the second threaded rod (40). 2) is fixedly connected to the top of the slide (41), and the fixed plate 2 (42) is slidably connected to the slide groove (43) at the top of the drive box (38), the shell 1 (44) is slidably connected to the slide groove (43) at the top of the drive box (38) through the fixed plate 3 (45), and the second threaded rod (40) passes through the two side walls of the shell 1 (44), and a connecting component (46) is arranged in the shell 1 (44), two fixing components (47) are rotatably connected to the inner walls of the fixed plate 2 (42) and the fixed plate 3 (45), and the second detector (48) is fixedly installed on the top of the drive box (38) through a fixing bracket (49).

9. A steam turbine blade detection device according to claim 8, characterized in that: The connecting assembly (46) comprises a fixing sleeve (50), the top of the fixing sleeve (50) is fixedly connected to the top of the housing (44), the threaded block (51) is fixedly connected to the top of the fixing sleeve (50) through the spring (52), and the side wall of the threaded block (51) is slidably connected to the inner wall of the fixing sleeve (50), the bottom of the threaded block (51) is threadedly connected to the second threaded rod (40), the threaded adjustment rod (53) is threadedly connected to the fixing plate (45), the lower end of the threaded adjustment rod (53) passes through the fixing plate (45) and is fixedly connected with a push rod (54), and the lower end of the push rod (54) slides through the top of the housing (44) and contacts the top of the threaded block (51).

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