Blade precision detection device for ultrahigh-pressure steam turbine

Abstract

The invention relates to the technical field of turbine blade detection, in particular to an ultrahigh pressure turbine blade precision detection device which comprises a workbench, a mounting mechanism, a water impact mechanism and a precision detection mechanism, one side of the workbench is provided with a control terminal with a built-in PLC, and one side of the workbench is further provided with a water tank capable of using water circularly. Two fixing frames are installed between the side walls of the workbench, a cross beam is installed between the fixing frames on the two sides, the installation mechanism is arranged on the workbench, a horizontally-arranged blade is clamped in the middle of the installation mechanism, and the installation mechanism can drive the blade to rotate and adjust so as to control the simulation position and the detection position of the blade. The water impact mechanism is arranged between the two cross beams on the upper portion, the water impact mechanism is connected with the water tank, and a collecting groove is formed in the workbench. Compared with the prior art, the simulation test process of the blade under the action of water flow impact can be effectively simulated, and the radian change of the blade can be better fitted.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine blade detection, and in particular to an ultra-high pressure steam turbine blade accuracy detection device. Background Art

[0002] Ultra-high pressure steam turbine refers to a steam turbine with a main steam pressure of 11.8-14.7MPa. Steam turbine blades are one of its key large components. When working, the blades not only have to withstand the static stress generated by the centrifugal force during high-speed rotation and the dynamic stress of the steam flow, but also have to withstand environmental factors such as corrosion, high temperature and erosion. Under the influence of many factors, it is easy to cause cracks and even breakage of the blade body, and the breakage will cause the unit to stop operating and cause great economic losses.

[0003] When water hammer occurs in a steam turbine, the stress of the first few blades will suddenly increase and they will be cooled suddenly, causing the blades to be overloaded. The impact load on the last few blades will be even greater. After severe water hammer, the blades will deform and produce fine cracks on the steam inlet and outlet sides, which will become the root cause of blade vibration and fracture. Therefore, it is also extremely important to ensure the performance of the blades in the water erosion process during the production process. The most intuitive manifestation of the influence of water erosion is the change in blade thickness. In the current existing technology, due to the certain curvature of the blades, there is no precision detection device specifically used for steam turbine blades to complete this project test.

[0004] Therefore, it is necessary to provide an ultra-high pressure steam turbine blade accuracy detection device that can achieve the effect of automatic detection. Summary of the invention

[0005] The object of the present invention is to provide an ultra-high pressure steam turbine blade accuracy detection device to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: An ultra-high pressure steam turbine blade precision detection device comprises a workbench, a mounting mechanism, a water impact mechanism and a precision detection mechanism, a control terminal with a built-in PLC controller is arranged on one side of the workbench, and a water tank capable of circulating water is also arranged on one side, two fixing frames are installed between the side walls of the workbench, and a crossbeam is installed between the fixing frames on both sides; The mounting mechanism is arranged on a workbench, a horizontally arranged blade is clamped in the middle of the mounting mechanism, and the mounting mechanism can drive the blade to rotate and adjust to control the simulation position and the detection position of the blade; The water impact mechanism is arranged between the two upper beams, the water impact mechanism is connected to the water tank, and a collecting trough is provided on the workbench, which can return the water sprayed out by the water impact mechanism to the water tank for reuse; The precision detection mechanism includes a detection input component, a detection output component and a detection component. The detection input component is provided with two groups and is installed between the side walls of the fixing frame on one side in a vertically distributed manner. During detection, the detection input component is attached to the upper surface and the lower surface of the blade and reciprocates for detection at the same time. The detection output component is provided with two groups and is respectively arranged on one side of the outside of the detection input component on the same side, and the detection input component is connected and matched with the detection output component. The detection component is arranged between the ends of the two groups of detection output components. The detection component includes two detection bars, on which inclination sensors are arranged. The two detection bars are adjusted synchronously with the movement of the detection output components connected thereto, and the value difference of the inclination sensors on the two detection bars is used to reflect the thickness change of the blade.

[0007] In one embodiment, the mounting mechanism further comprises a positioning seat and a base, the base is a truncated cone-shaped structure and is rotatably arranged on the workbench, two positioning seats are arranged, a "T"-shaped moving frame is arranged on the bottom wall of the positioning seat, the bottom end of the moving frame slides between the inner walls of the base by means of threaded transmission, and the two positioning seats can only move towards or away from each other at the same time; The blade comprises a blade body, a blade root and a blade crown. The blade body is installed between the blade root and the side wall of the blade crown, and the blade crown is fixed between the positioning seats on both sides. The blade crown of the blade always maintains a horizontal state.

[0008] In one embodiment, the water impact mechanism includes a moving seat, a connecting seat and a spraying member, the moving seat is provided with a mounting groove, the connecting seat is arranged between the inner walls of the mounting groove, and a clamping plate is further installed between the inner walls of the mounting groove on one side of the connecting seat, the moving seat slides between two cross beams located above, wherein a linear motor is further installed on a fixing frame near the position of the water impact mechanism, and the output shaft end of the linear motor is connected and fixed to the clamping plate; A collecting trough is provided on the workbench below the water impact mechanism, a collecting box is installed on the outer wall of the workbench at one end of the collecting trough, a through hole 1 penetrating the side wall of the workbench is provided between the collecting trough and the collecting box, and the through hole 1 is provided along the width direction of the workbench; A circulation pump is installed on the top of the water tank, a circulation pipe is connected between the circulation pump and the collection box, a water pump is installed on the top of the movable seat, a water inlet pipe is connected between the water pump and the water tank, and a water outlet pipe is connected between the water pump and the connecting seat, wherein the interior of the connecting seat is a cavity structure; The spraying part comprises a spraying pipe and a spraying head. The spraying pipe is installed at the bottom of the connecting seat, and the spraying head is installed on the end of the spraying pipe.

[0009] In one embodiment, the detection input assembly includes a connecting frame, an adjustment seat, a limiting cylinder and a U-shaped frame; Two connecting frames are provided and both are fixed between the side walls of one of the fixing frames, and two parallel connecting arms are provided on one side wall of the connecting frame, and a screw rod 2 is provided on the connecting arm to rotate along the length direction thereof; The adjustment seat is in an "I"-shaped structure, and the adjustment seat slides between the side walls of the two connecting arms on the same connecting frame. A through hole 2 is opened on the adjustment seat along its length direction, and a limit frame is also installed on the top surface of the adjustment seat; The limiting cylinder is arranged in a cubic structure, and protrusions are arranged on both side walls of the limiting cylinder, and the protrusions slide between the inner walls of the limiting frame, and a probe member for elastic lifting adjustment penetrates between the inner walls of the limiting cylinder, and the probe member is an axial structure and its bottom end is a pointed structure, and the bottom end of the probe member penetrates and slides between the inner walls of the second through hole; The U-shaped frame is installed on the top of the probe tube, and a limiting axis is installed between the side walls thereof. A guide groove is opened along the vertical direction of the U-shaped frame, and the top of the guide groove is open.

[0010] In one embodiment, the detection input assembly further includes a synchronization arm, a rotating disk, and a side support; The side support is arranged in a "⊥"-shaped structure and is installed between the side walls of the two connecting frames. A worm wheel is rotatably arranged at one end of the side support between its inner walls, and a worm is rotatably arranged at one side of the end of the side support, and the worm is meshed with the worm wheel; Two rotating disks are provided and are respectively located above and below the side support. The two rotating disks are connected to the worm gear through a synchronous shaft for synchronous rotation adjustment. A connecting bolt is installed on the rotating disk. One end of the synchronous arm is connected to the connecting bolt and they are in rotational contact. A through hole four is opened on the other end of the synchronous arm along its length direction. The limit cylinder slides between the inner walls of the through hole four, and the bottom end of the synchronous arm is always in sliding contact with the top surface of the limit frame.

[0011] In one embodiment, the detection output mechanism includes an L bracket, a movable handle 1, a movable handle 2, and an adjustment handle; Two L brackets arranged opposite to each other are fixedly mounted on the two crossbeams on the same side, and a connecting shaft 1 is arranged between the two opposite L brackets; Two fixing grooves 2 are provided on one of the fixing frames, and a coaxially connected linkage frame and a linkage frame are respectively slidably arranged along the length direction of the fixing frame on both sides of the fixing groove 2, the linkage frame slides between the outer walls of the synchronization arm, and the linkage frame is arranged in a "U"-shaped structure; The movable handle 1 is rotatably arranged between the side walls of the linkage frame through an axis connection, and the movable handle 1 is arranged in an "L"-shaped structure. A through hole 6 is opened on one end of the movable handle 1 along its length direction, and the limit shaft penetrates and slides between the inner walls of the through hole 6, and the side walls of the movable handle 1 are respectively in contact with the inner side walls of the U-shaped frame on both sides, and a rotating shaft 1 is penetrated on the other end of the movable handle 1; The movable handle 2 includes a connecting handle 1 and a connecting handle 2, one end of the connecting handle 1 slides between the inner walls of the connecting handle 2, and the connecting handle 1 and the connecting handle 2 can be connected as a whole by suction, wherein one end of the connecting handle 1 slides on the connecting shaft 1 and can be in rotational contact with it, and the end of the connecting handle 1 is just located between the side walls of the U-shaped frame, and a rotating shaft 2 runs through one end of the connecting handle 2; The adjusting handle is arranged in an "H"-shaped structure, the first rotating shaft and the second rotating shaft are both rotatably arranged between the side walls at one end of the adjusting handle, and the second connecting shaft is arranged between the side walls at the other end of the adjusting handle.

[0012] In one embodiment, the detection assembly further includes a positioning frame and a mounting seat, the positioning frame is arranged in an "L"-shaped structure and its bottom end is fixed on the workbench, the mounting seat is arranged on the other end of the positioning frame, and an external power supply is arranged on one side wall of the mounting seat, and the external power supply is connected to the PLC controller through an electrical signal; An indicator mark is installed on one end of the detection strip, and the other end thereof is rotated on the side wall of the mounting base by means of an axis connection, and a guide hole is opened along the length direction of the detection strip, and the connecting shaft moves between the inner walls of the guide hole. The inclination sensor is connected to the external power supply by a wire, and the data detected by the inclination sensor can be transmitted to the PLC controller by means of an electrical signal.

[0013] In one embodiment, when the probe member moves toward the side of the connecting shaft 1, the U-shaped frame drives one end of the movable handle 1 to move toward the direction close to the connecting shaft 1; When the probe moves toward the side where the blade in the detection state is located, the U-shaped frame drives one end of the movable handle 1 to move in a direction away from the connecting shaft 1; In both cases, the movement of the movable handle 1 synchronously drives the movable handle 2 to rotate and adjust, so that the adjustment handle also applies a force to the detection strip under the coordinated driving of the movable handle 1 and the movable handle 2, causing the detection strip to rotate.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: The crown of the blade is fixed by setting a mounting mechanism, and the overall horizontal state of the blade is maintained. A water impact mechanism is set on one side of the mounting mechanism, and the reciprocating rotation of the blade is controlled to simulate the process of the blade being impacted by water flow in actual work. During detection, the blade is controlled to rotate 180 degrees to the detection position. At this time, by using the cooperation of the detection input mechanism and the detection output mechanism, the end of the probe tube of the detection input mechanism moves synchronously along the upper surface and the upper surface of the blade along the curvature change of the blade, thereby continuously measuring the thickness of a certain area of ​​the blade in real time, and reflecting the rotation angle changes of the two detection bars caused by the upper and lower surfaces of the blade respectively through the detection component, and judging whether the blade thickness changes by the numerical changes of the two inclination sensors and the rotation direction of the detection bar. The present invention can effectively simulate the simulation test process of the blade under the impact of water flow, and can better fit the curvature change of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0016] In the attached picture: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 Schematic diagram of the main structure; Figure 3 It is a structural schematic diagram of the installation mechanism of the present invention; Figure 4 It is a structural schematic diagram of the water impact mechanism of the present invention; Figure 5 It is a structural schematic diagram of the precision detection mechanism of the present invention; Figure 6 is a schematic diagram of the structure of the detection input component of the present invention; Figure 7 yes Figure 6 Schematic diagram of the connection between the center synchronization arm, the limit frame, the limit cylinder, the probe cylinder and the U-shaped frame; Figure 8 It is a structural schematic diagram of the detection output component of the present invention; Fig. 9 It is a structural schematic diagram of the movable handle 2 of the present invention.

[0017] In the figure: 1. control terminal; 2. workbench; 21. fixed frame; 211. crossbeam; 22. water tank; 221. circulation pump; 3. installation mechanism; 31. blade; 311. blade body; 312. blade root; 313. blade crown; 32. positioning seat; 321. mobile frame; 33. base; 331. screw rod 1; 4. water impact mechanism; 41. mobile seat; 411. water pump; 42. connecting seat; 43. spraying part; 5. detection input component; 51. connecting frame; 511. connecting arm; 512. screw rod 2; 52. adjusting seat; 521. limit frame; 53. limit cylinder; 531. probe cylinder part; 54. U-shaped frame; 541, limit shaft; 55, synchronization arm; 56, rotating disk; 57, side support; 571, worm; 572, worm wheel; 6, detection output component; 61, L bracket; 611, connecting shaft one; 62, movable handle one; 621, rotating shaft one; 63, movable handle two; 631, connecting handle one; 632, connecting handle two; 633, built-in power supply; 634, electromagnet; 635, rotating shaft two; 64, adjustment handle; 641, connecting shaft two; 65, linkage frame; 651, linkage frame; 7, detection component; 71, positioning frame; 72, mounting seat; 73, detection component; 731, inclination sensor. DETAILED DESCRIPTION

[0018] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0019] like Figure 1-2As shown, the present invention provides a technical solution: a precision detection device for an ultra-high pressure steam turbine blade 31, comprising a workbench 2, a mounting mechanism 3, a water impact mechanism 4 and a precision detection mechanism, the workbench 2 is arranged in a stepped structure, and a control terminal 1 electrically connected to the workbench 2 is arranged on one side of the workbench 2, the control terminal 1 has a built-in PLC controller, the mounting mechanism 3 is arranged on the workbench 2, and the blade root 312 of the blade 31 is fixed in the mounting mechanism 3 to keep the blade 31 in a horizontal state, one side of the mounting mechanism 3 is provided with a water impact mechanism 4 whose horizontal position can be adjusted above the workbench 2, for simulating the water impact process on the blade 31, and the other side of the mounting mechanism 3 is provided with a precision detection mechanism above the workbench 2, the precision detection mechanism comprises a detection input component 5, a detection output component 6 and a detection component 7, the detection input component 5 is contact-induced with the blade 31, and the angle change of the detection component 7 is controlled by the detection output component 6, so that the thickness change of the blade 31 is intuitively reflected by the value change of the inclination sensor 731.

[0020] like Figure 3 As shown, the mounting mechanism 3 includes a blade 31, a positioning seat 32 and a base 33; The base 33 is a truncated cone structure, and the base 33 is rotatably arranged on the workbench 2. A rotating motor 1 (not shown in the figure) connected to the base 33 is installed between the inner walls of the workbench 2. A fixing groove 1 is opened on the top surface of the base 33, and a screw 1 331 is rotatably arranged between the inner walls of the fixing groove 1, and a rotating motor 2 (not shown in the figure) connected to and driven by the screw 1 331 is installed between one end of the fixing groove 1 between the inner walls of the base 33, wherein the screw 1 331 is a bidirectional screw.

[0021] A "T"-shaped moving frame 321 is installed on the bottom wall of the positioning seat 32 by screws, and a screw rod 331 passes through the moving frames 321 on both sides and cooperates with them through threaded transmission respectively. The moving frames 321 on both sides move toward or away from each other, wherein the positioning seat 32 matches the outer contour of the blade root 312 of the blade 31.

[0022] The blade 31 includes a blade body 311 , a blade root 312 , and a blade shroud 313 . The blade root 312 and the blade shroud 313 are respectively installed at two ends of the blade body 311 .

[0023] It should be further explained that the rotating motor 2 is started by the PLC controller to control the rotation direction of the screw 1 331, thereby controlling the two moving frames 321 to approach each other. During the approach process, the blade root 312 of the blade 31 is manually placed in the middle position of the two moving frames 321 until the two moving frames 321 completely fix the blade root 312. The rotating motor 2 can then be stopped, and the blade 31 is in a horizontal state.

[0024] Among them, in the initial state of installing the blade 31, the blade 31 is set horizontally toward the side where the water impact mechanism 4 is located. During the simulation of water impact, the blade 31 rotates back and forth 90 degrees. During the detection process, the blade 31 rotates 180 degrees from its initial state position to the horizontal side facing the accuracy detection mechanism.

[0025] like Figure 1 and Figure 4 As shown, the water impact mechanism 4 includes a moving seat 41, a connecting seat 42 and a spraying member 43; A water tank 22 is also installed on one side wall of the workbench 2, and a circulation pump 221 is installed on the water tank 22. A collecting trough is provided on the workbench 2, and the bottom wall of the collecting trough is tilted downward. A through hole 1 is provided on the side wall of the workbench 2 corresponding to the end of the collecting trough, and a collecting box is installed on the outer wall of the workbench 2 on one side of the through hole 1. A circulation pipe is connected between the collecting box and the circulation pump 221 for recovering the water flowing down from the spraying and allowing it to flow back into the water tank 22 for multiple utilization.

[0026] Two "U"-shaped fixing frames 21 are installed between the opposite side walls of the workbench 2 by bolts, and a crossbeam 211 with an axial structure is fixed between the side walls of the fixing frames 21 on both sides by welding.

[0027] A movable seat 41 is slidably arranged between the two upper cross beams 211, a mounting groove is opened in the middle of the movable seat 41, and a connecting seat 42 with an I-shaped structure and a cavity structure inside is installed between the inner walls of the mounting groove, and a clamping plate is also installed between one side wall of the connecting seat 42 and the mounting groove by screws, so that the connecting seat 42 is clamped between the mounting groove and the clamping plate, and a spray component 43 is installed at the bottom of the connecting seat 42, wherein the spray component 43 includes a vertically arranged spray pipe and a spray head, the top end of the spray pipe is installed in the middle of the bottom wall of the connecting seat 42 by a threaded connection, and the spray head is also installed on the bottom end of the spray pipe by a threaded connection.

[0028] A water pump 411 is installed on the top wall of the movable seat 41 by screws. A water inlet pipe and a water outlet pipe are connected to the water pump 411. The other end of the water inlet pipe is connected to the water tank 22, and the other end of the water outlet pipe is connected to the connecting seat 42.

[0029] A connecting ring is installed on one side wall of the card plate by screws, a linear motor is installed on the side wall of the fixing frame 21 close to the card plate by screws, and the output shaft end of the linear motor is connected to the connecting ring by fastening screws.

[0030] It should be further explained that the linear motor is started through the PLC controller to drive the moving seat 41 to make linear motion along the beams 211 on both sides, thereby driving the spraying part 43 to move and adjust. The linear motor is stopped when it is adjusted to the required position. Subsequently, the water pump 411 and the circulating pump 221 are started to continuously circulate the spray, and the rotating motor 1 is started through the PLC controller to drive the base 33 to rotate back and forth 90 degrees, thereby simulating the process in which the blades 31 are continuously impacted by water flow in actual work.

[0031] like Figure 5-9 As shown, the detection input assembly 5 includes a connecting frame 51, an adjustment seat 52, a limit cylinder 53, a U-shaped frame 54, a synchronization arm 55, a rotating disk 56 and a side support seat 57; The connecting frame 51 is provided with two upper and lower distributions, and the two connecting frames 51 are fixed between the side walls of one side fixing frame 21 by screws and are arranged in the horizontal direction. Two connecting arms 511 connected thereto are arranged on the side walls of the connecting frame 51, and the rotating motor 3 and the shaft seat are installed on the connecting arms 511 by screws. The output end of the rotating motor 3 is installed with a screw rod 2 512, and the other end of the screw rod 2 512 is rotatably arranged between the inner walls of the shaft seat (the part where the screw rod 2 512 is connected to the shaft seat is threaded), and the adjustment seat 52 is arranged in an "I"-shaped structure and slides between the side walls of the connecting frame 51, and the two screw rods 2 512 on the same connecting frame 51 are both penetrated through the adjustment seat 52 and adjusted with it by thread transmission.

[0032] A through hole 2 is opened on the adjustment seat 52 along its length direction, and a limit frame 521 is installed on the top wall of the adjustment seat 52 by screws. Through holes 3 are opened on the opposite side walls of the limit frame 521 along its length direction. A limit cylinder 53 is slidably set on the top wall of the adjustment seat 52 between the side walls of the limit frame 521. The limit cylinder 53 is a cubic structure. Bumps are welded on the side walls of both sides of the limit cylinder 53, and the bumps slide between the inner walls of the through hole 3.

[0033] A probe tube member 531 is elastically arranged between the inner walls of the limit tube 53. The probe tube member 531 is an axial structure and has a pointed structure at its bottom end. The probe tube member 531 slides and adjusts along the inner wall of the through hole 2 synchronously with the movement of the limit tube 53. A U-shaped frame 54 is installed on the top of the probe tube member 531 by screws. A limit shaft 541 is inserted between the side walls of the U-shaped frame 54, and an open guide groove is opened on the U-shaped frame 54 along its vertical direction.

[0034] The position of the adjustment seat 52 and the position of the moving seat 41 are symmetrically arranged with respect to the center of the base 33 .

[0035] It should be further explained that the rotating motor 3 is started by the PLC controller to drive the screw 2 512 to rotate, thereby controlling the horizontal movement of the adjustment seat 52 on the connecting frame 51 by thread transmission to cooperate with the moving seat 41 to adjust to the corresponding position for detection.

[0036] A side support 57 of a "⊥"-shaped structure is also installed between the side walls on the same side of the two connecting frames 51 by bolts, and end plates are installed on the side walls of both sides of the side support 57 at positions near the ends by screws, a worm 571 is rotatably arranged between the end plates on both sides, and a rotating motor 4 connected to and driven by the worm 571 is installed on the side wall of one of the end plates by screws, a worm wheel 572 meshing with the worm 571 is rotatably arranged between the inner walls of the side support 57, and rotating disks 56 are respectively arranged above and below the side support 57, and the two rotating disks 56 are connected by a synchronous shaft and are adjusted to rotate in the same direction. The synchronous shaft passes through the center of the worm wheel 572 and rotates synchronously with it, that is, the worm wheel 572 and the two rotating disks 56 have the same direction of rotation.

[0037] A synchronization arm 55 is also provided between the side walls of the limit tube 53 for sliding contact therewith, and the synchronization arm 55 is also in sliding contact with the limit frame 521 located on the same side thereof. A connecting bolt rotatably connected to the synchronization arm 55 is penetrated through one end of the synchronization arm 55, and the bottom end of the connecting bolt is fixed between the inner walls of the rotating disk 56 by a threaded connection. A through hole four is opened on the synchronization arm 55 along its length direction, and the limit frame 521 can slide between the inner walls of the through hole four.

[0038] It should be further explained that the rotating motor 4 is started by the PLC controller to drive the worm 571 to rotate, and the worm 571 drives the worm wheel 572 to make a circular motion, so that the rotating disks 56 on both sides make a circular motion synchronously, and as the rotating disk 56 continues to move, the synchronization arm 55 connected thereto also moves synchronously, and the limit cylinder 53 between the synchronization arms 55 is also limited by the limit frame 521, so that when the synchronization arm 55 moves, the limit cylinder 53 is controlled to slide back and forth along the inner wall of the limit frame 521, so that the probe tube members 531 on both sides synchronously move in the same direction along the length direction of the adjustment seat 52, and during detection, the tip of the probe tube member 531 can be pressed against a certain position of the blade 31 and move synchronously with its arc to detect the thickness change of the blade 31.

[0039] The detection output assembly 6 includes an L bracket 61, a movable handle 1 62, a movable handle 2 63, an adjustment handle 64 and a linkage frame 65; A fixing groove 2 is provided on one of the fixing frames 21, and the fixing groove 2 is arranged along its width direction. A through hole 5 is provided in the fixing groove 2 along its length direction. A linkage shaft is slidably provided between the inner walls of the through hole 5. A linkage frame 65 and a "U"-shaped linkage frame 651 are respectively installed at both ends of the linkage shaft. The linkage frame 65 slides on the outer surface of the synchronization arm 55.

[0040] A movable handle 62 is rotatably provided between the side walls of the linkage frame 651 via an axis connection. The movable handle 62 is provided in an "L"-shaped structure, and a through hole 6 is provided at one end of the movable handle 62. The limiting shaft 541 slides through the inner walls of the through hole 6, and the U-shaped frame 54 contacts the side walls of the movable handle 62.

[0041] L brackets 61 are installed on the cross beams 211 on both sides by screws, and a connecting shaft 1 611 is welded between the L brackets 61 on both sides. The guide groove of the U-shaped frame 54 can move up and down synchronously along the outer surface of the connecting shaft 1 611 as the probe tube 531 moves up and down. A movable handle 2 63 is connected to the connecting shaft 1 611 in the middle of the U-shaped frame 54. The U-shaped frame 54 can control the synchronous reciprocating movement of the movable handle 1 62 and the movable handle 2 63, so as to ensure the overall linkage of the detection output component 6. An "H"-shaped adjusting handle 64 is rotatably provided on the other end of the movable handle 2 63 through a rotating shaft 2 635. The rotating shaft 2 635 penetrates the movable handle 2 63, and a rotating shaft 1 621 is penetrated on the other end of the movable handle 1 62. The rotating shaft 1 621 is rotatably provided between the side walls of the adjusting handle 64, and a connecting shaft 2 641 rotatably contacted with the adjusting handle 64 is penetrated between the side walls of the other end of the adjusting handle 64.

[0042] Among them, the movable handle 63 includes a connecting handle 1 631 and a connecting handle 2 632, the connecting handle 1 631 and the connecting shaft 1 611 are rotatably connected, and one end of the connecting handle 1 631 is slidably set between the inner walls of the connecting handle 2 632, the rotating shaft 1 621 runs through the inner walls of the connecting handle 2 632, and an electromagnet 634 matching the connecting handle 1 631 is embedded between the inner walls of the connecting handle 2 632, and one side of the electromagnet 634 is also equipped with a built-in power supply 633 connected to it by a wire on the inner wall of the connecting handle 2 632, the built-in power supply 633 is connected to the PLC controller through an electrical signal, and the end of the connecting handle 1 631 that moves in the connecting handle 2 632 is made of iron material, and suction can be generated between this end and the electromagnet 634.

[0043] It should be further explained that when the position of the adjustment seat 52 is moved and adjusted, the electromagnet 634 is in a non-working state. At this time, one end of the connecting handle 1 631 is in sliding contact with the inner wall of the electromagnet 634. When the adjustment is completed, the electromagnet 634 is started by starting the built-in power supply 633, so that the connecting handle 1 631 and the connecting handle 2 632 are connected together by suction.

[0044] The detection assembly 7 includes a positioning frame 71, a mounting seat 72 and two detection strips 73. The positioning frame 71 is arranged in an "L"-shaped structure and its bottom end is fixed on the workbench 2. The mounting seat 72 is arranged on the other end of the positioning frame 71, and an external power supply is arranged on one side wall of the mounting seat 72. The external power supply is connected to the PLC controller through an electrical signal. An indicator is installed on one end of the detection strip 73, and the other end thereof is rotated on the side wall of the mounting seat 72 by an axis connection. A guide hole is opened along the length direction of the detection strip to connect The second shaft 641 moves between the inner walls of the guide hole, and a mounting hole is opened on the detection strip 73. An inclination sensor 731 is installed between the inner walls of the mounting hole. The inclination sensor 731 is connected to the external power supply through a wire, and the data detected by the inclination sensor 731 can be transmitted to the PLC controller in the form of an electrical signal. The two detection strips 73 are adjusted synchronously with the movement of the detection output component 6 connected thereto, and the value difference of the inclination sensors 731 on the two detection strips 73 is used to reflect the thickness change of the blade 31.

[0045] It should be further explained that the movable handle 1 62 uses the axis connection center at its corner as the rotation center, and one end of the movable handle 1 62 is passively moved by the limit shaft 541 on the U-shaped frame 54, so that the other end of the movable handle 1 62 synchronously controls the movement of the adjusting handle 64. At the same time, when the movable handle 1 62 is rotated and adjusted, the movable handle 2 63 is limited by the connection shaft 1 611 at one end, and its other end will cooperate with the movable handle 1 62 to synchronously make corresponding actions on the adjusting handle 64, so that the movement adjustment of the adjusting handle 64 is ultimately controlled through the cooperation between the movable handle 1 62 and the movable handle 2 63, and then the synchronous movement of the upper and lower adjusting handles 64 is used to control the state change of the detection bar 73 on the detection assembly 7 on both sides respectively. As the detection bar 73 is rotated and adjusted, the inclination sensor 731 inside it also detects the rotation angle in real time and transmits the data to the PLC controller for comparison and judgment.

[0046] Since the linkage frame 65 is arranged on the outer surface of the synchronization arm 55, the synchronization arm 55 will synchronously drive the linkage frame 651 to move together when it moves with the rotating disk 56, and synchronize the reciprocating motion of the limit cylinder 53, thereby ensuring that during the reciprocating motion of the probe tube part 531, the detection bar 73, movable handle 1 62, movable handle 2 63 and adjustment handle 64 will all move and adjust in the same vertical plane with it.

[0047] by Figure 2 As shown in the figure, in the process of detecting the blade 31, when the probe member 531 moves from one side of the blade 31 to the other side, due to the existence of the arc, it is assumed that the arc changes from low to high. At this time, Figure 2 The U-shaped frame 54 at the upper middle position moves upward synchronously with the movement of the probe tube 531, so that the left end of the upper movable handle 1 62 outputs downward to the adjustment handle 64, and the upper movable handle 2 63 also outputs downward to the adjustment handle 64, so that the upper connecting shaft 2 641 applies a force to the detection bar 73 and makes it rotate synchronously. At the same time, the lower U-shaped frame 54 moves upward synchronously with the movement of the probe tube 531, so that the left end of the lower movable handle 1 62 also outputs downward to the adjustment handle 64, and the lower movable handle 2 63 also outputs downward. The output of the adjusting handle 64 is assisted, so that the lower connecting shaft 641 also applies a force to the detection bar 73 and causes it to rotate synchronously. However, because the thickness on the blade 31 is consistent under normal circumstances, the actions of the upper and lower connecting shafts 641 on the detection bar 73 are synchronized, so that the data transmitted to the PLC controller by the inclination sensors 731 in the two detection bars 73 can be transmitted and compared synchronously, and then the thickness change of the blade 31 is reflected according to the rotation direction of the detection bar 73 and the change in the angle value detected by the two inclination sensors 731.

[0048] Working principle: First, the blade crown 313 of the blade 31 is fixed between the two positioning seats 32, and the linear motor is started by the PLC controller to adjust the position of the moving seat 41. After adjusting to the desired position, the bottom end of the spraying member 43 is aligned with the upper surface of the blade 31 at this time. Then, the rotating motor 1 is started to control the reciprocating rotation adjustment of the base 33, so that the blade 31 is Figure 1 At the same time, the water pump 411 and the circulation pump 221 are started, and water begins to be sprayed downward from the spraying member 43, so that the blade 31 is continuously impacted by the water flow during the rotation process, so as to simulate the condition of the blade 31 in actual work. During the test, if the blade 31 is broken by the impact of the water flow, the water impact process is terminated and a new blade is replaced for testing.

[0049] Next, during the inspection, the adjustment seat 52 is controlled to move and adjust through the threaded transmission output of the screw rod 512, and the length of the movable handle 63 is also adjusted. After the position is adjusted, the position of the L bracket 61 is fixed, and the electromagnet is started to fix the length of the movable handle 63.

[0050] Then, the control base 33 is Figure 2 The horizontal right position shown is rotated 180 degrees to the horizontal left position and stops, and then the worm 571 is started, so that the worm wheel 572 drives the rotating disk 56 to rotate synchronously, so that the upper and lower probe tube members 531 start from one end position of the through hole 2 to the other end to make a linear motion, and move along the upper and lower surfaces of the blade 31 during the movement. The adjustment handles 64 on both sides move synchronously and simultaneously to control the angle change of the detection bar 73, and the rotation direction and rotation angle of the detection bar 73 (that is, the detection value of the inclination sensor 731) are used to reflect the influence of the water flow impact on the blade 31.

[0051] The above test simulation process is used to check the relevant performance of the steam turbine blade 31 to avoid the problem of short life in actual work.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, internal communication between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the meanings of the above terms in this application can be understood according to specific circumstances.

[0053] The above is a detailed introduction to an ultra-high pressure steam turbine blade precision detection device provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. An ultra-high pressure steam turbine blade accuracy detection device, characterized in that: include: A workbench (2), wherein a control terminal (1) with a built-in PLC controller is disposed on one side of the workbench (2), and a water tank (22) capable of circulating water is also disposed on one side of the workbench (2), two fixing frames (21) are installed between the side walls of the workbench (2), and a crossbeam (211) is installed between the fixing frames (21) on both sides; A mounting mechanism (3), the mounting mechanism (3) being arranged on the workbench (2), the middle of the mounting mechanism (3) clamping a horizontally arranged blade (31), and the mounting mechanism (3) being capable of driving the blade (31) to rotate and adjust, so as to control a simulation position and a detection position of the blade (31); A water impact mechanism (4), the water impact mechanism (4) being arranged between the two upper cross beams (211), the water impact mechanism (4) being connected to the water tank (22), and a collecting trough being provided on the workbench (2), the collecting trough being capable of returning water sprayed out of the water impact mechanism (4) to the water tank (22) for reuse; A precision detection mechanism, the precision detection mechanism comprising a detection input component (5), a detection output component (6) and a detection component (7), wherein two groups of the detection input components (5) are arranged and are installed between the side walls of a fixing frame (21) on one side in an up-and-down manner, and during detection, the detection input components (5) are in contact with the upper surface and the lower surface of the blade (31) and simultaneously reciprocate for detection, and the detection output components (6) are arranged in two groups and are respectively arranged on one side of the outside of the detection input components (5) on the same side as the detection input components (5), and the detection input components (5) are connected and matched with the detection output components (6); The detection component (7) is arranged between the ends of the two groups of detection output components (6). The detection component (7) comprises two detection bars (73). The detection bars (73) are provided with inclination sensors (731). The two detection bars (73) are respectively adjusted synchronously with the movement of the detection output components (6) connected thereto, and the difference in values ​​of the inclination sensors (731) on the two detection bars (73) is used to reflect the thickness change of the blade (31).

2. The ultra-high pressure steam turbine blade accuracy detection device according to claim 1, characterized in that: The mounting mechanism (3) further comprises a positioning seat (32) and a base (33); the base (33) is a truncated cone-shaped structure and is rotatably arranged on the workbench (2); two positioning seats (32) are arranged; a moving frame (321) with a "T"-shaped structure is arranged on the bottom wall of the positioning seat (32); the bottom end of the moving frame (321) slides between the inner walls of the base (33) by means of a threaded transmission, and the two positioning seats (32) can only move towards or away from each other at the same time; The blade (31) comprises a blade body (311), a blade root (312) and a blade crown (313); the blade body (311) is installed between the blade root (312) and the side wall of the blade crown (313); and the blade crown (313) is fixed between the positioning seats (32) on both sides; the blade crown (313) of the blade (31) always maintains a horizontal state.

3. The ultra-high pressure steam turbine blade accuracy detection device according to claim 2, characterized in that: The water impact mechanism (4) comprises a movable seat (41), a connecting seat (42) and a spraying element (43); a mounting groove is provided on the movable seat (41); the connecting seat (42) is arranged between the inner walls of the mounting groove; a clamping plate is also installed on one side of the connecting seat (42) between the inner walls of the mounting groove; the movable seat (41) slides between two cross beams (211) located above; a linear motor is also installed on the fixing frame (21) near the position of the water impact mechanism (4); and the end of the output shaft of the linear motor is connected and fixed to the clamping plate; A collecting trough is provided on the workbench (2) below the water impact mechanism (4); a collecting box is installed on the outer wall of the workbench (2) at one end of the collecting trough; a through hole is provided between the collecting trough and the collecting box, penetrating the side wall of the workbench (2); the through hole is provided along the width direction of the workbench (2); A circulation pump (221) is installed on the top of the water tank (22), a circulation pipe is connected between the circulation pump (221) and the collection box, a water pump (411) is installed on the top of the movable seat (41), a water inlet pipe is connected between the water pump (411) and the water tank (22), and a water outlet pipe is connected between the water pump (411) and the connecting seat (42), wherein the interior of the connecting seat (42) is a hollow structure; The spraying member (43) comprises a spraying pipe and a spraying head. The spraying pipe is mounted on the bottom of the connecting seat (42), and the spraying head is mounted on the end of the spraying pipe.

4. The ultra-high pressure steam turbine blade accuracy detection device according to claim 3, characterized in that: The detection input assembly (5) comprises a connecting frame (51), an adjustment seat (52), a limiting cylinder (53) and a U-shaped frame (54); Two connecting frames (51) are provided and are fixed between the side walls of one of the fixing frames (21), and two connecting arms (511) arranged in parallel are also provided on one side wall of the connecting frame (51), and a second screw rod (512) is rotatably provided on the connecting arm (511) along its length direction; The adjustment seat (52) is in an "I"-shaped structure. The adjustment seat (52) slides between the side walls of two connecting arms (511) on the same connecting frame (51). The adjustment seat (52) is provided with two through holes along its length direction. In addition, a limit frame (521) is also installed on the top surface of the adjustment seat (52). The limiting cylinder (53) is arranged in a cubic structure, and protrusions are arranged on both side walls of the limiting cylinder (53), and the protrusions slide between the inner walls of the limiting frame (521). An elastically adjustable probe tube member (531) penetrates between the inner walls of the limiting cylinder (53), and the probe tube member (531) is an axial structure and its bottom end is a pointed structure. The bottom end of the probe tube member (531) penetrates and slides between the inner walls of the second through hole; The U-shaped frame (54) is mounted on the top of the probe tube member (531), and a limiting axis (541) is mounted between the side walls thereof. A guide groove is provided along the vertical direction of the U-shaped frame (54), and the top of the guide groove is open.

5. The ultra-high pressure steam turbine blade accuracy detection device according to claim 4, characterized in that: The detection input assembly (5) further comprises a synchronization arm (55), a rotating disk (56) and a side support seat (57); The side support seat (57) is arranged in a "⊥"-shaped structure and is installed between the side walls of the two connecting frames (51); a worm wheel (572) is rotatably arranged at one end of the side support seat (57) between its inner walls, and a worm (571) is rotatably arranged at one side of the end of the side support seat (57); the worm (571) is meshed with the worm wheel (572); Two rotating disks (56) are provided and are respectively located above and below the side support (57). The two rotating disks (56) are connected to the worm gear (572) via a synchronous shaft for synchronous rotation adjustment. A connecting bolt is installed on the rotating disk (56). One end of the synchronous arm (55) is connected to the connecting bolt and is in rotational contact therebetween. A through hole four is opened on the other end of the synchronous arm (55) along its length direction. The limiting cylinder (53) slides between the inner walls of the through hole four, and the bottom end of the synchronous arm (55) is always in sliding contact with the top surface of the limiting frame (521).

6. The ultra-high pressure steam turbine blade accuracy detection device according to claim 5, characterized in that: The detection output mechanism comprises an L bracket (61), a movable handle 1 (62), a movable handle 2 (63) and an adjustment handle (64); Two L brackets (61) arranged opposite to each other are fixedly mounted on the two crossbeams (211) located on the same side, and a connecting shaft (611) is arranged between the two opposite L brackets (61); Two fixing grooves 2 are provided on one of the fixing frames (21), and a coaxially connected linkage frame (65) and a linkage frame (651) are respectively slidably arranged on both sides of the fixing grooves 2 along the length direction of the fixing frame (21), the linkage frame (65) slides between the outer walls of the synchronization arm (55), and the linkage frame (651) is arranged in a "U"-shaped structure; The movable handle 1 (62) is rotatably arranged between the side walls of the linkage frame (651) via an axis connection. The movable handle 1 (62) is arranged in an "L"-shaped structure. A through hole 6 is opened along its length direction at one end of the movable handle 1 (62). The limit shaft (541) passes through and slides between the inner walls of the through hole 6. The side walls of the movable handle 1 (62) are respectively in contact with the inner side walls of the U-shaped frame (54). A rotating shaft 1 (621) passes through the other end of the movable handle 1 (62). The movable handle 2 (63) comprises a connecting handle 1 (631) and a connecting handle 2 (632), one end of the connecting handle 1 (631) slides between the inner walls of the connecting handle 2 (632), and the connecting handle 1 (631) and the connecting handle 2 (632) can be connected as a whole by suction, wherein one end of the connecting handle 1 (631) slides on the connecting shaft 1 (611) and can be in rotational contact therewith, and the end of the connecting handle 1 (631) is exactly located between the side walls of the U-shaped frame (54), and a rotating shaft 2 (635) passes through one end of the connecting handle 2 (632); The adjustment handle (64) is arranged in an "H"-shaped structure, and the first rotation shaft (621) and the second rotation shaft (635) are both rotatably arranged between the side walls at one end of the adjustment handle (64), and the second connecting shaft (641) is arranged between the side walls at the other end of the adjustment handle (64).

7. The ultra-high pressure steam turbine blade accuracy detection device according to claim 6, characterized in that: The detection assembly further comprises a positioning frame (71) and a mounting seat (72); the positioning frame (71) is arranged in an "L"-shaped structure and its bottom end is fixed on the workbench (2); the mounting seat (72) is arranged on the other end of the positioning frame (71); an external power supply is arranged on one side wall of the mounting seat (72); and the external power supply is connected to the PLC controller via an electrical signal; An indicator mark is mounted on one end of the detection strip (73), and the other end thereof is rotatably mounted on the side wall of the mounting seat (72) by means of an axis connection, and a guide hole is provided along the length direction of the detection strip, and the second connecting shaft (641) moves between the inner walls of the guide hole. The inclination sensor (731) is connected to an external power supply by means of a wire, and data detected by the inclination sensor (731) can be transmitted to a PLC controller by means of an electrical signal.

8. The ultra-high pressure steam turbine blade accuracy detection device according to claim 7, characterized in that: When the probe member (531) moves toward the side where the connecting shaft (611) is located, the U-shaped frame (54) drives one end of the movable handle (62) to move toward a direction close to the connecting shaft (611); When the probe tube member (531) moves toward the side where the blade (31) in the detection state is located, the U-shaped frame (54) drives one end of the movable handle (62) to move in a direction away from the connecting shaft (611); In both cases, the movement of the movable handle 1 (62) synchronously drives the movable handle 2 (63) to rotate and adjust together, so that the adjustment handle (64) also applies a force to the detection bar (73) under the cooperative driving of the movable handle 1 (62) and the movable handle 2 (63), and the detection bar (73) rotates.

Images