Roundness measuring device for dynamic seal cylinder body of steam turbine

Abstract

The invention discloses a roundness measuring device for a dynamic seal cylinder body of a steam turbine, and relates to the technical field of steam turbine overhaul, the roundness measuring device comprises a dummy shaft and a measuring cylinder installed on the dummy shaft, and the side part of the measuring cylinder is provided with a wireless laser range finder used for measuring the roundness of a dynamic seal cylinder body. A cleaning belt used for cleaning and covering the transmitting end of the wireless laser range finder is arranged between the wireless laser range finder and the dummy shaft, before measurement, the wireless laser range finder is controlled to rotate, and the cleaning belt moves in the direction away from the wireless laser range finder and rotates for self-cleaning. According to the roundness measuring device for the dynamic seal cylinder body of the steam turbine, the wireless laser range finder is designed in a rotary mode, dust can be conveniently shaken off, meanwhile, the wireless laser range finder is matched with the cleaning belt capable of conducting self-cleaning to conduct automatic cleaning of the transmitting end, and after measurement is completed, the cleaning belt can be attached to the transmitting end of the wireless laser range finder to conduct dustproof and anti-collision protection; the use efficiency of the roundness measuring device for the dynamic seal cylinder body of the steam turbine is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine maintenance, and in particular to a roundness measuring device for a steam turbine dynamic sealing cylinder. Background Art

[0002] Steam turbines are rotating equipment that uses steam as a power fluid. They have dynamic seals, which need to be installed with steam seals to prevent steam leakage. The turbine cylinder is the stationary part of the turbine, which is divided into the upper and lower cylinders. The cylinder is a multi-layer structure, and the interior of the cylinder is equipped with stationary parts such as baffles and stationary blade holders.

[0003] For example, a patent entitled: A roundness measuring device and method for a dynamic sealing cylinder of a steam turbine (patent application number: CN202210289270.3) discloses a roundness measuring device and method for a dynamic sealing cylinder of a steam turbine, comprising a plurality of wireless laser rangefinders and a rotary unit for installing the plurality of wireless laser rangefinders, wherein the rotary unit is provided with a driving mechanism, and the driving mechanism drives the rotary unit to rotate; when measuring the roundness of the dynamic sealing cylinder, the rotary unit is supported by bearing boxes at both ends of the steam turbine, and the rotation center of the rotary unit coincides with the axis of the turbine rotor, and the plurality of wireless laser rangefinders are located inside the dynamic sealing cylinder, rotate with the rotary unit, and measure the roundness of the dynamic sealing cylinder or the diameter of the steam seal tooth, but the dust in the workshop is easily attached to the transmitting end of the wireless laser rangefinder, which will scatter the laser beam, causing the laser energy to weaken, thereby affecting the accuracy of the distance measurement. If they are cleaned one by one manually, the workload of the operator will be increased and the measurement efficiency will be reduced.

[0004] Therefore, it is necessary to propose a roundness measuring device for a steam turbine dynamic sealing cylinder to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a roundness measuring device for a turbine dynamic sealing cylinder to solve the problem that dust in a workshop is easily attached to the transmitting end of a wireless laser rangefinder, scattering the laser beam, causing the laser energy to weaken, thereby affecting the accuracy of ranging. If it is cleaned one by one manually, the workload of the operator will increase and the measurement efficiency will be reduced.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a roundness measuring device for a dynamic sealing cylinder of a steam turbine, comprising a dummy shaft and a measuring cylinder mounted on the dummy shaft, a wireless laser rangefinder for measuring the roundness of the dynamic sealing cylinder body being arranged on the side of the measuring cylinder, a cleaning belt for cleaning and covering the transmitting end of the wireless laser rangefinder being arranged between the wireless laser rangefinder and the dummy shaft;

[0007] Before measurement, the wireless laser rangefinder is controlled to rotate, the cleaning belt moves away from the wireless laser rangefinder and rotates for self-cleaning, and the transmitting end of the wireless laser rangefinder is adjusted from being attached to the cleaning belt to facing away from the cleaning belt;

[0008] After the measurement is completed, the wireless laser rangefinder is reversed and reset to shake off the dust, and the cleaning belt is moved toward the wireless laser rangefinder to reset. After completing self-cleaning, the cleaning belt wipes and cleans the transmitting end of the wireless laser rangefinder, and then the cleaning belt is attached to the transmitting end of the wireless laser rangefinder for protection.

[0009] Preferably, a positioning sleeve is fixedly connected to the outside of the measuring cylinder, a circular groove is provided on the positioning sleeve, a rotating rod is rotatably connected to the inside of the circular groove, and a through groove for the rotating rod to pass through is provided on the side wall of the measuring cylinder, one end of the rotating rod located outside the measuring cylinder is fixedly connected to a square plate, and the wireless laser rangefinder is fixedly connected to the square plate.

[0010] Preferably, a movable frame is slidingly provided inside the measuring cylinder, and the end of the movable frame away from the false axis is fixedly connected to a spring, and the end of the spring away from the movable frame abuts against the inner wall of the measuring cylinder, and a gear block is fixedly connected to the movable frame, and a plurality of gear blocks are provided, and the end of the rotating rod located inside the measuring cylinder is fixedly connected to a gear, and the gear cooperates with the gear block.

[0011] Preferably, a mobile box is provided on the outside of the cleaning belt, and rollers are rotatably connected to the upper and lower ends of the mobile box, and the two rollers are connected through the cleaning belt transmission. A sliding channel is provided on the side wall of the measuring cylinder, and a slide is slidably provided inside the sliding channel. The slide is fixedly connected to the mobile frame, and an elastic telescopic rod is fixedly connected to the side of the slide facing the wireless laser rangefinder, and the mobile box is fixedly connected to the end of the elastic telescopic rod away from the slide.

[0012] Preferably, a transmission assembly for driving the cleaning belt to rotate is provided between the movable box and the measuring cylinder, and the transmission assembly includes a friction wheel and a friction strip, the friction strip is fixedly connected to the bottom of the measuring cylinder, the friction wheel is fixedly connected to a rotating roller located at a lower position, and the friction wheel and the friction strip are abutted and matched.

[0013] Preferably, a square groove is provided on the movable box, an adhesive dust removal roller is inserted into the interior of the square groove, and the adhesive dust removal roller is attached to the cleaning belt.

[0014] Preferably, a push rod is slidably connected to the inside of the measuring cylinder, a through groove for the push rod to pass through is provided on the dummy shaft, the movable frame is fixedly connected to the push rod, a square bar is provided inside the dummy shaft, the push rod is fixedly connected to the square bar, a circular hole is provided on the side of the dummy shaft facing away from the measuring cylinder, a threaded rod is rotatably connected to the inside of the circular hole, and a threaded hole cooperating with the threaded rod is provided on the square bar.

[0015] Preferably, a plurality of measuring cylinders are provided, and the plurality of measuring cylinders are evenly distributed.

[0016] Preferably, both ends of the dummy shaft are rotatably sleeved with support rings, one of the support rings is provided with a driving mechanism for driving the dummy shaft to rotate, and the two support rings are respectively supported on the bearing boxes at the corresponding ends of the turbine through adjustment mechanisms radially symmetrically arranged on their outsides, and the adjustment mechanism includes a support frame fixedly connected to the corresponding support ring, and the support frame is a U-shaped structure, and upper and lower adjusting screws and left and right adjusting screws are installed on the support frame. The position of the dummy shaft is adjusted by the upper and lower adjusting screws and left and right adjusting screws so that the dummy shaft and the axial hole at the end of the dynamic sealing cylinder body are on the same axis.

[0017] Preferably, a digital display inclinometer is installed at one end of the dummy shaft, and counterweights are symmetrically installed at the inner ends of the dummy shaft.

[0018] Technical effects and advantages of the present invention:

[0019] 1. The wireless laser rangefinder of the present invention is designed to be rotatable, which is convenient for shaking off dust. At the same time, it cooperates with the self-cleaning cleaning belt to automatically clean the transmitting end. After the measurement is completed, the cleaning belt can be attached to the transmitting end of the wireless laser rangefinder for dust and collision protection, thereby improving the use efficiency of the roundness measuring device of the turbine dynamic sealing cylinder;

[0020] 2. After the measurement, the cleaning tape is recovered between the mobile box and the wireless laser rangefinder. At the same time, the cleaning tape and the transmitting end of the wireless laser rangefinder are protected from dust and collision to facilitate the subsequent use of the cleaning tape;

[0021] 3. When the square bar drives the mobile frame to move, the wireless laser rangefinder is controlled to rotate, the cleaning belt is moved and rotated at the same time, so as to improve the control efficiency and ensure the stability of the device;

[0022] 4. Set up structures such as rotating rods and square plates to enable the wireless laser rangefinder to rotate. Before cleaning and protection, the rotation of the wireless laser rangefinder can also shake off some dust, which is convenient for subsequent wiping and cleaning;

[0023] 5. When the wireless laser rangefinder rotates, the distance between the cleaning belt and the wireless laser rangefinder gradually expands, which does not affect the rotation of the wireless laser rangefinder and avoids excessive squeezing of the wireless laser rangefinder;

[0024] 6. When the moving box drives the friction wheel to move, the cleaning belt rotates at the same time to avoid the same position always contacting the transmitting end of the wireless laser rangefinder, ensuring the cleaning effect, and the adhesive dust removal roller absorbs the dust on the cleaning belt to avoid continuous accumulation of dust on the cleaning belt, achieving a self-cleaning effect, thereby ensuring the efficiency of subsequent wiping and cleaning;

[0025] 7. When the wireless laser rangefinder rotates to be offset from the cleaning belt, at the moment the elastic telescopic rod is reset, the moving box produces a shaking effect, so that the residual dust on the cleaning belt is shaken off, and with the movement of the cleaning belt, the residual dust and the cleaning belt are quickly separated, achieving the effect of shaking off the residual dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic diagram of the roundness measuring device of the dynamic sealing cylinder of a steam turbine.

[0027] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure in the middle.

[0028] Figure 3 For the present invention Figure 1 Enlarged schematic diagram of the structure at point B in the middle.

[0029] Figure 4 It is a schematic structural diagram of the outer cylinder and the dynamic sealing cylinder body of the present invention.

[0030] Figure 5 It is a schematic diagram of the structure of the dummy shaft and the measuring tube of the present invention.

[0031] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point C in the middle.

[0032] Figure 7 It is a schematic diagram of the structure of the moving box and the cleaning belt of the present invention.

[0033] Figure 8 This is a schematic diagram of the wireless laser rangefinder of the present invention in use.

[0034] Fig. 9 This is a schematic diagram of the recovery state of the wireless laser rangefinder of the present invention.

[0035] Fig.10 It is a schematic diagram of the movable frame and spring structure of the present invention.

[0036] Fig.11 For the present invention Fig.10 Enlarged schematic diagram of the structure at point D in the middle.

[0037] Fig.12 It is a schematic diagram of the push rod and square bar structure of the present invention.

[0038] Fig.13 For the present invention Fig.12 Enlarged schematic diagram of the structure at point E in the middle.

[0039] Fig.14 For the present invention Fig.12 Enlarged schematic diagram of the structure at F in the middle.

[0040] Fig.15 The present invention is a diagram showing the use status of the roundness measuring device for the dynamic sealing cylinder of a steam turbine.

[0041] In the figure: 1. dummy shaft; 2. measuring cylinder; 3. wireless laser rangefinder; 4. moving box; 5. rotating roller; 6. cleaning belt; 7. square groove; 8. adhesive dust removal roller; 9. positioning sleeve; 10. rotating rod; 11. square plate; 12. round groove; 13. round hole; 14. gear; 15. moving frame; 16. spring; 17. tooth block; 18. push rod; 19. square bar; 20. threaded rod; 21. sliding channel; 22. slide; 23. elastic telescopic rod; 24. friction wheel; 25. friction strip; 26. driving mechanism; 27. adjusting mechanism; 271. supporting frame; 272. upper and lower adjusting screw; 273. left and right adjusting screw; 28. supporting ring; 29. ​​digital display angle meter; 30. counterweight; 31. outer cylinder; 32. dynamic sealing cylinder body. DETAILED DESCRIPTION

[0042] The present invention provides Figure 1 to Figure 15 The roundness measuring device of a dynamic seal cylinder of a steam turbine shown in the figure comprises a dummy shaft 1 and a measuring cylinder 2 mounted on the dummy shaft 1, wherein a plurality of measuring cylinders 2 are provided and the plurality of measuring cylinders 2 are evenly distributed, and a wireless laser rangefinder 3 for measuring the roundness of a dynamic seal cylinder body 32 is provided on the side of the measuring cylinder 2. During measurement, the transmitting end of the wireless laser rangefinder 3 faces away from the dummy shaft 1.

[0043] In addition, a laptop computer equipped with a plug-in wireless data receiver cooperates with the wireless laser rangefinder 3, and a data processing unit is used to analyze the measured data. Data analysis and processing is a common existing technology and will not be described in detail here.

[0044] Support rings 28 are rotatably sleeved at both ends of the dummy shaft 1. The two support rings 28 are supported on the bearing boxes at the corresponding ends of the steam turbine through adjustment mechanisms 27 radially symmetrically arranged on their outer sides.

[0045] The adjustment mechanism 27 includes a support frame 271 fixedly connected to the corresponding support ring 28. The support frame 271 is a U-shaped structure, and an upper and lower adjustment screw 272 and a left and right adjustment screw 273 are installed on the support frame 271. When in use, the position is adjusted by the upper and lower adjustment screw 272 and the left and right adjustment screw 273 so that the dummy shaft 1 and the shaft hole at the end of the dynamic seal cylinder body 32 are on the same axis.

[0046] A driving mechanism 26 for driving the dummy shaft 1 to rotate is arranged in one of the support rings 28. The driving mechanism 26 includes a worm wheel, a worm, a handwheel and other structures. The worm wheel is fixedly sleeved with the dummy shaft 1. The worm wheel is located in the middle of the corresponding support ring 28, and the outer tooth edge of the worm wheel does not contact the inner wall of the support ring 28. The ends of the support ring 28 are axially clamped with bearings, and the bearings are fixedly sleeved with the dummy shaft 1. The worm wheel is meshed with the worm transversely arranged at the top of the corresponding support ring 28. The handwheel is fixedly installed at one end of the worm, and the worm can also be driven to rotate by a motor instead of the handwheel. Specifically, the worm drives the worm wheel to rotate, and the worm wheel synchronously drives the dummy shaft 1 to rotate along the bearing in the support ring 28. The driving mechanism 26 and its working principle are both existing common technologies and will not be described in detail here.

[0047] A digital display angle meter 29 is installed at one end of the dummy shaft 1 to display the rotation angle of the wireless laser rangefinder 3, so as to accurately control the rotation movement of the wireless laser rangefinder 3; counterweight blocks 30 are symmetrically installed at the inner ends of the dummy shaft 1 to reduce the static deflection of the middle part of the dummy shaft 1 so that its static deflection is consistent with the rotor of the turbine.

[0048] In actual use, first place the lower half of the dynamic seal cylinder body 32 into the outer cylinder 31, and fix the lower half of the dynamic seal cylinder body 32. Then, the two support rings 28 are supported on the bearing box at the corresponding end of the turbine through the adjustment mechanism 27 radially symmetrically arranged on the outside, so that the wireless laser rangefinder 3 is located in the lower half of the dynamic seal cylinder body 32, and the wireless laser rangefinder 3 is adapted to the position of the partition sleeve and the stationary blade holding ring of the dynamic seal cylinder body 32.

[0049] At the same time, the position is adjusted by the upper and lower adjusting screws 272 and the left and right adjusting screws 273 so that the dummy shaft 1 and the axial hole at the end of the dynamic sealing cylinder body 32 are on the same axis; then the upper half of the dynamic sealing cylinder body 32 is connected and tightened with the lower half, and then the upper half of the outer cylinder 31 is connected and tightened with the lower half.

[0050] Then, by controlling the driving mechanism 26 to cooperate with the dummy shaft 1, the wireless laser rangefinder 3 is rotated around the rotating axis in the dynamic seal cylinder body 32. During the rotation, the distance data from the dynamic seal cylinder body 32 to the partition sleeve and the stationary blade holding ring is obtained, so that the roundness of the dynamic seal cylinder body 32 can be measured.

[0051] Considering that when the roundness measuring device of the dynamic sealed cylinder of the steam turbine is placed in the workshop, the dust in the workshop is easy to adhere to the transmitting end of the wireless laser rangefinder 3. When the dust adheres to the transmitting end of the wireless laser rangefinder 3, it will scatter the laser beam, causing the laser energy to weaken, thereby affecting the accuracy of the distance measurement; at the same time, during the transfer process of the roundness measuring device of the dynamic sealed cylinder of the steam turbine before measurement and use, if the transmitting end of the wireless laser rangefinder 3 is facing away from the dummy shaft 1, it is easy for the transmitting end to collide with foreign objects due to the operator's careless handling. In order to improve the use efficiency of the roundness measuring device of the dynamic sealed cylinder of the steam turbine, a cleaning belt 6 for cleaning and covering the transmitting end of the wireless laser rangefinder 3 is provided between the wireless laser rangefinder 3 and the dummy shaft 1. The outer ring of the cleaning belt 6 can be made of but not limited to cotton material, has the effect of wiping and cleaning, and can undergo a certain deformation when squeezed, thereby reducing the wear on the wireless laser rangefinder 3.

[0052] The outside of the measuring tube 2 is fixedly connected with a positioning sleeve 9, a circular groove 12 is provided on the positioning sleeve 9, a rotating rod 10 is rotatably connected inside the circular groove 12, and a through groove for the rotating rod 10 to pass through is provided on the side wall of the measuring tube 2, and a square plate 11 is fixedly connected to one end of the rotating rod 10 located outside the measuring tube 2, and the wireless laser rangefinder 3 is fixedly connected to the square plate 11. The rotating rod 10, the square plate 11 and other structures are provided so that the wireless laser rangefinder 3 can rotate, and when the wireless laser rangefinder 3 rotates, some dust can be shaken off, which is convenient for subsequent wiping and cleaning.

[0053] Before measurement, the transmitting end of the wireless laser rangefinder 3 is controlled to face away from the cleaning belt 6 to facilitate subsequent roundness measurement; and after the measurement, the transmitting end of the wireless laser rangefinder 3 faces the cleaning belt 6, and the cleaning belt 6 fits and covers the transmitting end of the wireless laser rangefinder 3 for protection.

[0054] A moving frame 15 is slidably arranged inside the measuring cylinder 2 , and a spring 16 is fixedly connected to one end of the moving frame 15 away from the dummy shaft 1 . The end of the spring 16 away from the moving frame 15 abuts against the inner wall of the measuring cylinder 2 to assist the moving frame 15 in resetting.

[0055] The movable frame 15 is fixedly connected with a gear block 17, and a plurality of gear blocks 17 are provided, and the plurality of gear blocks 17 are continuously distributed. One end of the rotating rod 10 located inside the measuring cylinder 2 is fixedly connected with a gear 14, and the gear 14 cooperates with the gear block 17. Fig.10 , Fig.11 When the moving frame 15 moves to the right, the gear 14 rotates clockwise due to the cooperation between the gear 14 and the tooth block 17, and the gear 14 drives the wireless laser rangefinder 3 to rotate clockwise through the rotating rod 10 and the square plate 11.

[0056] A moving box 4 is arranged outside the cleaning belt 6 , and rollers 5 are rotatably connected to the upper and lower ends of the moving box 4 , and the two rollers 5 are connected through the cleaning belt 6 .

[0057] In order to realize the movement of the mobile box 4 and the cleaning belt 6, a sliding channel 21 is provided on the side wall of the measuring cylinder 2, and a slide 22 is slidably provided inside the sliding channel 21. The slide 22 is fixedly connected to the mobile frame 15, and an elastic telescopic rod 23 is fixedly connected to the side of the slide 22 facing the wireless laser rangefinder 3, and the mobile box 4 is fixedly connected to the end of the elastic telescopic rod 23 away from the slide 22. The elastic telescopic rod 23 is provided so that the distance between the mobile box 4 and the slide 22 is adjustable, which is convenient for the rotation of the wireless laser rangefinder 3.

[0058] A transmission assembly for driving the cleaning belt 6 to rotate is provided between the moving box 4 and the measuring cylinder 2. The transmission assembly includes a friction wheel 24 and a friction strip 25. The friction strip 25 is fixedly connected to the bottom of the measuring cylinder 2. The friction wheel 24 is fixedly connected to the roller 5 located at the lower position. The friction wheel 24 and the friction strip 25 are in abutment with each other. The friction wheel 24 and the friction strip 25 are both provided with anti-skid bumps and other structures on the outside. When the friction wheel 24 moves with the moving box 4 and other structures, it is affected by the friction force between the friction wheel 24 and the friction strip 25, and the friction wheel 24 will rotate, and drive the roller 5 fixedly connected thereto to rotate. With the cooperation of the other roller 5, the cleaning belt 6 rotates.

[0059] The transmission assembly can also be replaced by gears and racks. When the friction wheel 24 and the friction strip 25 are used, the serrated structure of the rack will not appear at the bottom of the measuring tube 2, which is convenient for the operator to hold the measuring tube 2 for maintenance and other operations; when gears and racks are used, the transmission stability is increased and frequent replacement is not required. In actual use, it can be selected according to specific conditions.

[0060] A square groove 7 is provided on the mobile box 4, and an adhesive dust removal roller 8 is inserted into the interior of the square groove 7. The adhesive dust removal roller 8 is attached to the cleaning belt 6. The adhesive dust removal roller 8 has the effect of absorbing dust and can be replaced regularly.

[0061] In order to control the movement of the moving frame 15, a push rod 18 is slidably connected inside the measuring cylinder 2, a through slot for the push rod 18 to pass through is provided on the dummy shaft 1, and the moving frame 15 is fixedly connected to the push rod 18. A square bar 19 is provided inside the dummy shaft 1, and the push rod 18 is fixedly connected to the square bar 19. A round hole 13 is provided on the side of the dummy shaft 1 facing away from the measuring cylinder 2, a threaded rod 20 is rotatably connected inside the round hole 13, and a threaded hole matching the threaded rod 20 is provided on the square bar 19. The square bar 19 is provided to synchronously control multiple push rods 18, thereby improving the convenience of operation.

[0062] The operator rotates the threaded rod 20. Since a threaded hole that cooperates with the threaded rod 20 is provided on the square bar 19, and under the limit cooperation of the push rod 18 and the measuring tube 2, the square bar 19 will move, and the friction coefficient between the threaded rod 20 and the threaded hole is appropriate, the threaded rod 20 will not rotate at will. A limit assembly can also be set to cooperate with the threaded rod 20. The limit assembly includes structures such as a latch to prevent the threaded rod 20 from rotating at will. The limit assembly is a common existing technology and will not be described here.

[0063] In addition, the threaded rod 20 can also be replaced by an electric push rod. When the threaded rod 20 is used, the wireless laser rangefinder 3 is prevented from being affected by electromagnetic interference through mechanical transmission, thereby improving the measurement accuracy; while when the electric push rod is used, the convenience of operation can be increased, and electromagnetic shielding treatment is required. In actual use, it can be selected according to specific circumstances.

[0064] Before measurement, the operator rotates the threaded rod 20, and the square bar 19 moves away from the measuring tube 2, and the square bar 19 drives the push rod 18 to move synchronously.

[0065] Reference Fig. 9 , Fig.10 , Fig.11 , the push rod 18 and the moving frame 15 move to the right, and due to the cooperation between the gear 14 and the tooth block 17, the gear 14 rotates clockwise, and the gear 14 drives the wireless laser rangefinder 3 to rotate clockwise through the rotating rod 10 and the square plate 11; when the wireless laser rangefinder 3 rotates, the cleaning belt 6 wipes and cleans the transmitting end of the wireless laser rangefinder 3.

[0066] When the wireless laser rangefinder 3 rotates, the corners of its transmitting end will shrink by squeezing the elastic telescopic rod 23 through the cleaning belt 6 and the moving box 4; at the same time, the moving frame 15 drives the moving box 4 and the cleaning belt 6 to move to the right through the slide 22 and the elastic telescopic rod 23, gradually expanding the distance between the cleaning belt 6 and the wireless laser rangefinder 3, without affecting the rotation of the wireless laser rangefinder 3, avoiding excessive squeezing of the wireless laser rangefinder 3.

[0067] Furthermore, the moving box 4 drives the friction wheel 24 to move toward the dummy shaft 1. Since the friction wheel 24 and the friction strip 25 are in contact with each other, the friction wheel 24 rotates counterclockwise under the influence of the friction force. The friction wheel 24 drives the roller 5 fixedly connected thereto to rotate, and with the cooperation of the other roller 5, the cleaning belt 6 rotates counterclockwise (refer to Figure 7 ), the adhesive dust removal roller 8 absorbs the dust on the cleaning belt 6 that has been wiped and cleaned, preventing the dust from continuously accumulating on the cleaning belt 6, achieving a self-cleaning effect, thereby ensuring the efficiency of subsequent wiping and cleaning.

[0068] During the wiping and cleaning process, the cleaning belt 6 can rotate to avoid the same position always contacting with the transmitting end of the wireless laser rangefinder 3, thereby ensuring the cleaning effect.

[0069] When the wireless laser rangefinder 3 rotates to be offset from the cleaning belt 6, the squeezing force is lost, and the elastic telescopic rod 23 is reset and extended. At the moment when the elastic telescopic rod 23 is reset, the moving box 4 produces a shaking effect, so that the dust remaining on the cleaning belt 6 is shaken off, and in conjunction with the movement of the cleaning belt 6, the residual dust is quickly separated from the cleaning belt 6, thereby achieving the effect of shaking off the residual dust.

[0070] The transmitting end of the wireless laser rangefinder 3 is adjusted from being attached to the cleaning belt 6 to facing away from the cleaning belt 6, so as to facilitate subsequent measurement.

[0071] When the square bar 19 and the like drive the moving frame 15 to move, the wireless laser rangefinder 3 is controlled to rotate and the cleaning belt 6 is controlled to move and rotate at the same time, thereby improving the control efficiency and ensuring the stability of the device.

[0072] After the measurement is finished, the operator rotates the threaded rod 20 in the reverse direction, and the square bar 19 moves toward the direction of the measuring tube 2, and the square bar 19 drives the push rod 18 to move synchronously.

[0073] Reference Figure 8 , Fig.10 , Fig.11 , the push rod 18 and the moving frame 15 move to the left. Due to the cooperation between the gear 14 and the tooth block 17, the gear 14 rotates counterclockwise, and the gear 14 drives the wireless laser rangefinder 3 to rotate counterclockwise through the rotating rod 10 and the square plate 11; at the same time, the moving frame 15 drives the moving box 4 and the cleaning belt 6 to move to the left through the slide 22 and the elastic telescopic rod 23, gradually reducing the distance between the cleaning belt 6 and the wireless laser rangefinder 3.

[0074] When the transmitting end of the wireless laser rangefinder 3 approaches the cleaning belt 6, the corners of the transmitting end of the wireless laser rangefinder 3 will first contact the cleaning belt 6, and the elastic telescopic rod 23 will be squeezed and contracted by the cleaning belt 6 and the moving box 4, so that the cleaning belt 6 can be attached to the transmitting end of the wireless laser rangefinder 3 for protection.

[0075] In addition, when the moving box 4 and the cleaning belt 6 move to the left, due to the abutment and cooperation between the friction wheel 24 and the friction strip 25, the friction wheel 24 rotates clockwise under the influence of the friction force, and the friction wheel 24 drives the roller 5 fixedly connected thereto to rotate, and with the cooperation of the other roller 5, the cleaning belt 6 rotates clockwise (refer to Figure 7), the adhesive dust removal roller 8 adsorbs the dust on the cleaning belt 6 again, and the cleaning belt 6 after self-cleaning wipes and cleans the transmitting end of the wireless laser rangefinder 3, and then the cleaning belt 6 is attached to the transmitting end of the wireless laser rangefinder 3 for protection. At this time, the cleaning belt 6 is recovered between the mobile box 4 and the wireless laser rangefinder 3, and at the same time, the cleaning belt 6 and the transmitting end of the wireless laser rangefinder 3 are protected from dust and collision, which is convenient for the subsequent use of the cleaning belt 6.

[0076] The wireless laser rangefinder 3 of the present invention is rotatable, which is convenient for shaking off dust. At the same time, it cooperates with the self-cleaning cleaning belt 6 to automatically clean the transmitting end. After the measurement is completed, the cleaning belt 6 can be attached to the transmitting end of the wireless laser rangefinder 3 for dust and collision protection, thereby improving the use efficiency of the roundness measuring device of the turbine dynamic sealing cylinder.

[0077] Working principle: When the roundness measuring device of the turbine dynamic sealing cylinder is not in use, the transmitting end of the wireless laser rangefinder 3 faces the dummy shaft 1 and is attached to the cleaning belt 6 (refer to Fig. 9 As shown), the mobile box 4 cooperates with the cleaning belt 6 to cover and protect the transmitting end of the wireless laser rangefinder 3 to prevent dust from adhering and accumulating and avoid collision.

[0078] When measurement is required, the operator rotates the threaded rod 20 before measurement. Since the square bar 19 is provided with a threaded hole that matches the threaded rod 20, and under the limit cooperation of the push rod 18 and the measuring tube 2, the square bar 19 moves away from the measuring tube 2, and the square bar 19 drives the push rod 18 to move synchronously. Fig. 9 , Fig.10 , Fig.11 , the push rod 18 and the moving frame 15 move to the right, and because the gear 14 cooperates with the tooth block 17, the gear 14 rotates clockwise, and the gear 14 drives the wireless laser rangefinder 3 to rotate clockwise through the rotating rod 10 and the square plate 11; when the wireless laser rangefinder 3 rotates, the cleaning belt 6 wipes and cleans the transmitting end of the wireless laser rangefinder 3; and when the wireless laser rangefinder 3 rotates, the corners of its transmitting end will be squeezed by the cleaning belt 6 and the moving box 4 to shrink the elastic telescopic rod 23; at the same time, the moving frame 15 drives the moving box 4 and the cleaning belt 6 to move to the right through the slide 22 and the elastic telescopic rod 23, and gradually expands the distance between the cleaning belt 6 and the wireless laser rangefinder 3, which does not affect the rotation of the wireless laser rangefinder 3.

[0079] In addition, the moving box 4 drives the friction wheel 24 to move toward the dummy shaft 1. Due to the abutment and cooperation between the friction wheel 24 and the friction strip 25, the friction wheel 24 rotates counterclockwise under the influence of the friction force. The friction wheel 24 drives the rotating roller 5 fixedly connected thereto to rotate, and with the cooperation of the other rotating roller 5, the cleaning belt 6 rotates counterclockwise (refer to Figure 7), the adhesive dust removal roller 8 absorbs the dust on the cleaning belt 6 that has been wiped and cleaned, preventing the dust from continuously accumulating on the cleaning belt 6, achieving a self-cleaning effect, thereby ensuring the efficiency of subsequent wiping and cleaning.

[0080] When the wireless laser rangefinder 3 rotates to be offset from the cleaning belt 6, the squeezing force is lost, and the elastic telescopic rod 23 is reset and extended. At the moment when the elastic telescopic rod 23 is reset, the moving box 4 produces a shaking effect, so that the dust remaining on the cleaning belt 6 is shaken off, and in conjunction with the movement of the cleaning belt 6, the residual dust is quickly separated from the cleaning belt 6, thereby achieving the effect of shaking off the residual dust.

[0081] Next, the transmitting end of the wireless laser rangefinder 3 is adjusted from being attached to the cleaning belt 6 to facing away from the cleaning belt 6 to facilitate subsequent measurement.

[0082] During measurement, firstly, the lower half of the dynamic seal cylinder body 32 is placed into the outer cylinder 31, and the lower half of the dynamic seal cylinder body 32 is fixed, and then the two support rings 28 are supported on the bearing box at the corresponding end of the steam turbine through the adjustment mechanism 27 arranged radially symmetrically on the outside, so that the wireless laser rangefinder 3 is located in the lower half of the dynamic seal cylinder body 32, and the wireless laser rangefinder 3 is adapted to the position of the partition sleeve and the stationary blade holding ring of the dynamic seal cylinder body 32; at the same time, the position is adjusted by the upper and lower adjustment screws 272 and the left and right adjustment screws 273, so that the dummy shaft 1 and the dynamic seal cylinder body are aligned. The axial holes at the ends of the body 32 are on the same axis; then the upper half of the dynamic seal cylinder body 32 is connected and fastened to the lower half, and then the upper half of the outer cylinder 31 is connected and fastened to the lower half; then the wireless laser rangefinder 3 is rotated around the rotating axis in the dynamic seal cylinder body 32 by controlling the driving mechanism 26 and cooperating with the dummy shaft 1. During the rotation, the distance data from the dynamic seal cylinder body 32 to the partition sleeve and the stationary blade holding ring is obtained, so that the roundness of the dynamic seal cylinder body 32 can be measured. Since the transmitting end of the wireless laser rangefinder 3 has been wiped and cleaned before the measurement, the measurement accuracy can be improved.

[0083] After the measurement is completed, the operator rotates the threaded rod 20 in the opposite direction, and the square bar 19 moves toward the direction of the measuring tube 2, and the square bar 19 drives the push rod 18 to move synchronously. Figure 8 , Fig.10 , Fig.11, the push rod 18 and the moving frame 15 move to the left, and due to the cooperation between the gear 14 and the tooth block 17, the gear 14 rotates counterclockwise, and the gear 14 drives the wireless laser rangefinder 3 to rotate counterclockwise through the rotating rod 10 and the square plate 11; at the same time, the moving frame 15 drives the moving box 4 and the cleaning belt 6 to move to the left through the slide 22 and the elastic telescopic rod 23, and gradually reduces the distance between the cleaning belt 6 and the wireless laser rangefinder 3; when the transmitting end of the wireless laser rangefinder 3 is close to the cleaning belt 6, the corners of the transmitting end of the wireless laser rangefinder 3 will first contact the cleaning belt 6, and the elastic telescopic rod 23 will be squeezed and contracted by the cleaning belt 6 and the moving box 4, so that the subsequent cleaning belt 6 is attached to the transmitting end of the wireless laser rangefinder 3 for protection.

[0084] In addition, when the moving box 4 and the cleaning belt 6 move to the left, due to the abutment and cooperation between the friction wheel 24 and the friction strip 25, the friction wheel 24 rotates clockwise under the influence of the friction force, and the friction wheel 24 drives the roller 5 fixedly connected thereto to rotate, and with the cooperation of the other roller 5, the cleaning belt 6 rotates clockwise (refer to Figure 7 ), the adhesive dust removal roller 8 adsorbs the dust on the cleaning belt 6 again, and the cleaning belt 6 after self-cleaning wipes and cleans the transmitting end of the wireless laser rangefinder 3, and then the cleaning belt 6 is attached to the transmitting end of the wireless laser rangefinder 3 for protection.

Claims

1. A roundness measuring device for a steam turbine dynamic sealing cylinder, comprising a dummy shaft (1) and a measuring tube (2) mounted on the dummy shaft (1), characterized in that: A wireless laser rangefinder (3) for measuring the roundness of the dynamic seal cylinder body (32) is arranged on the side of the measuring cylinder (2); a cleaning belt (6) for cleaning and covering the transmitting end of the wireless laser rangefinder (3) is arranged between the wireless laser rangefinder (3) and the dummy shaft (1); Before measurement, the wireless laser rangefinder (3) is controlled to rotate, the cleaning belt (6) moves in a direction away from the wireless laser rangefinder (3) and rotates for self-cleaning, and the transmitting end of the wireless laser rangefinder (3) is adjusted from being attached to the cleaning belt (6) to facing away from the cleaning belt (6); After the measurement is finished, the wireless laser rangefinder (3) is reversed and reset to shake off dust, and the cleaning belt (6) is moved toward the wireless laser rangefinder (3) and reset. After the self-cleaning is completed, the cleaning belt (6) wipes and cleans the transmitting end of the wireless laser rangefinder (3), and then the cleaning belt (6) is attached to the transmitting end of the wireless laser rangefinder (3) for protection.

2. The roundness measuring device for a steam turbine dynamic sealing cylinder according to claim 1, characterized in that: The outside of the measuring cylinder (2) is fixedly connected to a positioning sleeve (9), a circular groove (12) is provided on the positioning sleeve (9), a rotating rod (10) is rotatably connected inside the circular groove (12), and a through groove for the rotating rod (10) to pass through is provided on the side wall of the measuring cylinder (2), one end of the rotating rod (10) located outside the measuring cylinder (2) is fixedly connected to a square plate (11), and the wireless laser rangefinder (3) is fixedly connected to the square plate (11).

3. The roundness measuring device for a steam turbine dynamic sealing cylinder according to claim 2, characterized in that: A movable frame (15) is slidably arranged inside the measuring cylinder (2); one end of the movable frame (15) away from the dummy shaft (1) is fixedly connected to a spring (16); one end of the spring (16) away from the movable frame (15) abuts against the inner wall of the measuring cylinder (2); a tooth block (17) is fixedly connected to the movable frame (15); a plurality of tooth blocks (17) are arranged; one end of the rotating rod (10) located inside the measuring cylinder (2) is fixedly connected to a gear (14); the gear (14) cooperates with the tooth block (17).

4. The roundness measuring device for a steam turbine dynamic sealing cylinder according to claim 3 is characterized in that: A moving box (4) is arranged outside the cleaning belt (6), and rollers (5) are rotatably connected at both upper and lower ends of the moving box (4), and the two rollers (5) are connected by transmission through the cleaning belt (6). A sliding channel (21) is provided on the side wall of the measuring cylinder (2), and a slide frame (22) is slidably arranged inside the sliding channel (21), and the slide frame (22) is fixedly connected to the moving frame (15). A side of the slide frame (22) facing the wireless laser rangefinder (3) is fixedly connected to an elastic telescopic rod (23), and the moving box (4) is fixedly connected to an end of the elastic telescopic rod (23) away from the slide frame (22).

5. The roundness measuring device for a steam turbine dynamic seal cylinder according to claim 4, characterized in that: A transmission assembly for driving the cleaning belt (6) to rotate is arranged between the moving box (4) and the measuring cylinder (2), and the transmission assembly comprises a friction wheel (24) and a friction strip (25). The friction strip (25) is fixedly connected to the bottom of the measuring cylinder (2), and the friction wheel (24) is fixedly connected to a rotating roller (5) located at a lower position. The friction wheel (24) and the friction strip (25) are in abutment with each other.

6. The roundness measuring device for a steam turbine dynamic seal cylinder according to claim 4, characterized in that: The movable box (4) is provided with a square groove (7), an adhesive dust removal roller (8) is inserted into the interior of the square groove (7), and the adhesive dust removal roller (8) is attached to the cleaning belt (6).

7. The roundness measuring device for a steam turbine dynamic seal cylinder according to claim 3 is characterized in that: A push rod (18) is slidably connected to the interior of the measuring cylinder (2); a through slot for the push rod (18) to pass through is provided on the dummy shaft (1); the movable frame (15) is fixedly connected to the push rod (18); a square bar (19) is provided inside the dummy shaft (1); the push rod (18) is fixedly connected to the square bar (19); a circular hole (13) is provided on a side of the dummy shaft (1) facing away from the measuring cylinder (2); a threaded rod (20) is rotatably connected to the interior of the circular hole (13); and a threaded hole matching the threaded rod (20) is provided on the square bar (19).

8. The roundness measuring device for a steam turbine dynamic seal cylinder according to claim 1, characterized in that: A plurality of measuring cylinders (2) are provided, and the plurality of measuring cylinders (2) are evenly distributed.

9. The roundness measuring device for a steam turbine dynamic seal cylinder according to claim 1, characterized in that: Both ends of the dummy shaft (1) are rotatably sleeved with support rings (28), one of the support rings (28) being provided with a driving mechanism (26) for driving the dummy shaft (1) to rotate, the two support rings (28) being supported on the bearing housings at the corresponding ends of the steam turbine respectively through adjustment mechanisms (27) radially symmetrically arranged on their outer sides, the adjustment mechanisms (27) comprising a support frame (271) fixedly connected to the corresponding support rings (28), the support frame (271) being a U-shaped structure, the support frame (271) being provided with up and down adjustment screws (272) and left and right adjustment screws (273), the position of the dummy shaft (1) being adjusted by the up and down adjustment screws (272) and left and right adjustment screws (273) so that the dummy shaft (1) and the shaft hole at the end of the dynamic seal cylinder body (32) are on the same axis.

10. The roundness measuring device for a steam turbine dynamic seal cylinder according to claim 1, characterized in that: A digital display angle meter (29) is installed at one end of the dummy shaft (1), and counterweight blocks (30) are symmetrically installed at the inner ends of the dummy shaft (1).

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