Steam seal clearance adjusting device of steam turbine

Abstract

The utility model relates to a steam turbine steam seal clearance adjusting device, which relates to the field of steam turbine steam seal, and comprises a rack, a fixing mechanism, a mounting mechanism, a control terminal and a lifting mechanism for lifting the fixing mechanism, the lifting mechanism is arranged on the rack, the fixing mechanism comprises a fixing frame, a placing plate and a plurality of clamping components, the fixing frame is arranged at the driving end of the lifting mechanism, the placing plate is arranged on the fixing frame, the clamping assembly comprises a clamping plate and a first telescopic cylinder, the first telescopic cylinder is arranged on the fixing frame, and the clamping plate is arranged on a telescopic rod of the first telescopic cylinder; the mounting mechanism comprises a mounting table and a driving assembly used for driving the detection rotor to rotate, the mounting table is arranged on the rack, the driving assembly is arranged on the mounting table, the control terminal is arranged on the rack, and the fixing mechanism and the lifting mechanism are in electric signal connection with the controller. According to the utility model, the steam seal detection and adjustment are more accurate.

Description

Technical Field

[0001] The utility model relates to the field of steam turbine gland seals, in particular to a steam turbine gland seal clearance adjustment device. Background Technique

[0002] An appropriate clearance needs to be left between the steam turbine rotor and the stator so that they do not rub against each other. The existence of the clearance will cause steam leakage, which will not only reduce the unit's efficiency but also affect the safe operation of the unit. In order to reduce steam leakage and prevent air from leaking in, a sealing device, usually called a gland seal, is required.

[0003] According to the different installation positions, gland seals can be divided into flow path part gland seals, diaphragm gland seals, and shaft end gland seals.

[0004] At present, a Chinese utility model patent application with the publication number CN217530546U and the publication date of October 4, 2022, proposes a steam turbine gland seal clearance adjustment device, including: an operating table, a longitudinal wall, and a force arm frame. The longitudinal wall is bolted and fastened on one side of the surface of the operating table. The force arm frame is horizontally arranged along the surface of the longitudinal wall and is connected to the longitudinal wall. It also includes an adjusting component for adjusting the aperture arranged on the side of the force arm frame facing the operating table.

[0005] During use, while the screw rod is rotated by rotating the connecting disc, the screw sleeve drives the pressing plate to move away from or close to each other along the screw rod through the connecting plate to a suitable position, realizing the adjustment of the distance between the pressing plates.

[0006] For the above-mentioned related technology, the gland seal surface is fixedly attached through the pressing plate and the pulley in the adjusting component. However, for the fixed housing at the outer end of some gland seals, according to the design requirements, it does not adopt a structure with a circular outer end face. If such gland seal products are fixed, using the above-mentioned related technology will result in too large a clearance during the fixing process, and further seriously affect the adjustment accuracy during the gland seal clearance adjustment process. Content of the Utility Model

[0007] In order to improve the accuracy of gland seal clearance adjustment, the utility model provides a steam turbine gland seal clearance adjustment device.

[0008] The utility model provides a steam turbine gland seal clearance adjustment device, adopting the following technical scheme:

[0009] A steam turbine gland clearance adjustment device includes a frame, a fixing mechanism, an installation mechanism, a control terminal, and a lifting mechanism for lifting the fixing mechanism. The lifting mechanism is arranged on the frame. The fixing mechanism includes a fixing frame, a placing plate, and a plurality of clamping components. The fixing frame is arranged on the driving end of the lifting mechanism. The placing plate is arranged on the fixing frame. The clamping component includes a clamping plate and a first telescopic cylinder. The first telescopic cylinder is arranged on the fixing frame. The clamping plate is arranged on the telescopic rod of the first telescopic cylinder. The installation mechanism includes an installation table and a driving component for driving the detection rotor to rotate. The installation table is arranged on the frame. The driving component is arranged on the installation table. The control terminal is arranged on the frame. The fixing mechanism, the lifting mechanism are electrically connected to the controller by electrical signals.

[0010] By adopting the above technical solution, when it is necessary to detect the clearance of the gland, in order to make the detection and adjustment more accurate, it is usually necessary to detect the gland together with the installation on the gland housing. By placing the outer shell of the fixed gland on the fixing frame, under the control of the control terminal, the first telescopic cylinder extends, so that the clamping plate abuts against the gland housing, and then the clamping component clamps the gland housing. By adjusting the lifting mechanism, the gland is lifted to facilitate the detection and adjustment personnel to paste the detection tape on the gland, and then the gland on the fixing mechanism is adjusted to a suitable detection position. Then the driving component drives the detection rotor to rotate. After the rotation detection is completed, the lifting mechanism lifts the gland, and then the staff observes the clearance distribution between the gland and the detection rotor and makes adjustments according to the size of the clearance, making the whole detection and adjustment process more convenient. At the same time, the step of disassembling the gland body is omitted, and the gland installation housing is directly carried, making the detection and adjustment more accurate.

[0011] Optionally, the fixing mechanism further includes a plurality of conveying rollers and a plurality of first motors. The conveying rollers are rotatably arranged on the placing plate. The first motors are arranged on the placing plate. The first motors are in transmission connection with the conveying rollers. The first motors are electrically connected to the control terminal by electrical signals.

[0012] By adopting the above technical solution, when installing the gland, the gland and the gland housing are conveyed to the conveying rollers by the conveying device, and then the first motors drive the conveying rollers to rotate, thereby feeding the gland into the fixing frame. At the same time, after the adjustment is completed, the gland can be sent out from the fixing frame through the conveying rollers, making the whole adjustment process more convenient and improving the detection and adjustment efficiency.

[0013] Optionally, the lifting mechanism includes a lifting frame, a lifting table, a lifting screw, a second motor, and a distance sensor. The lifting frame is disposed on the frame. The lifting table is slidably disposed on the lifting frame. The lifting screw is rotatably disposed on the lifting frame. The second motor is disposed on the lifting frame. The second motor is in transmission connection with the lifting screw. The lifting table is in threaded connection with the lifting screw. The distance sensor is disposed on the lifting table. The second motor and the distance sensor are electrically connected to the control terminal.

[0014] By adopting the above technical solution, when adjusting the displacement of the fixing mechanism, according to the detection signal of the distance sensor and under the regulation of the control terminal, the second motor drives the lifting screw to rotate, so that the lifting table can adjust its height, realizing the adjustment of the steam seal on the fixing mechanism to a proper position, making the coaxial accuracy between the steam seal and the detection rotor higher, and reducing the error of the steam seal adjustment accuracy.

[0015] Optionally, the lifting mechanism further includes a centering assembly. The centering assembly includes a detection bracket and a sensor array. The detection bracket is disposed on the frame. The sensor array is disposed on the detection bracket. The sensor array is electrically connected to the control terminal.

[0016] By adopting the above technical solution, during the lifting process, the height of the arc diameter surface of the steam seal can be obtained based on the upper end surface of the fixing frame, and then the highest point of the steam seal arc can be obtained through the signal of the highest point detected by the sensor array, so that the axial center height and position of the steam seal can be accurately obtained, and further the lifting mechanism can be adjusted more precisely, further reducing the clearance adjustment error and improving the adjustment effect.

[0017] Optionally, a translation mechanism is disposed on the frame. The translation mechanism includes a translation table, a third motor, and a translation screw. The translation table is slidably disposed on the frame. The third motor is disposed on the frame. The translation screw is rotatably disposed on the frame. The third driving motor is in transmission connection with the translation screw. The translation table is in threaded connection with the translation screw. The lifting frame is disposed on the translation table. The third motor is electrically connected to the control terminal.

[0018] By adopting the above technical solution, after the steam seal is fixed, if there is a deviation in the horizontal position, the third motor of the translation mechanism can drive the translation table to move, so as to move the axial center of the steam seal to a proper position, further reducing the clearance adjustment error and improving the adjustment effect.

[0019] Optionally, a rotating mechanism is provided on the lifting platform. The rotating mechanism includes a rotating table and a fourth motor. The rotating table is rotatably provided on the lifting platform. The fourth motor is provided on the lifting platform. The output shaft of the fourth motor is in transmission connection with the rotating table. The fixing frame is provided on the rotating table. The fourth motor is electrically connected to the control terminal.

[0020] By adopting the above technical solution, when the steam seal is axially offset after being fixed, the fourth motor in the rotating mechanism can drive the rotating table to rotate, making the axis of the steam seal parallel to the axis of the detection rotor, thereby reducing the detection and adjustment error and improving the adjustment effect.

[0021] Optionally, the rotating mechanism further includes a locking block and a second telescopic cylinder. The locking block is slidably provided on the lifting platform. The other end of the locking block abuts against the rotating table. The second telescopic cylinder is provided on the lifting platform. The locking block is provided on the telescopic rod of the second telescopic cylinder.

[0022] By adopting the above technical solution, when rotational adjustment is required, the second telescopic cylinder contracts to enable the rotating table to rotate. After the rotational adjustment is completed, the second telescopic cylinder extends to make the locking block abut tightly against the rotating table, stopping the rotating table from rotating, thereby achieving locking, reducing the possibility of the rotating table rotating again after the rotational adjustment, and thus reducing the error.

[0023] Optionally, the driving assembly includes a driving frame, a plurality of driving rollers and a fifth motor. The driving frame is provided on the machine frame. The driving rollers are provided on the driving frame. The fifth motor is provided on the driving frame. The output shaft of the fifth motor is in transmission connection with the driving rollers. The fifth motor is electrically connected to the control terminal.

[0024] By adopting the above technical solution, after the steam seal moves to the detection position, the fifth motor drives the driving rollers to rotate, driving the detection rotor corresponding to the steam seal to rotate, making the detection more convenient.

[0025] Optionally, the installation mechanism further includes an adjusting rod and a dial indicator. The adjusting rod is rotatably provided on the driving frame. The dial indicator is provided on the adjusting rod. The dial indicator is electrically connected to the control terminal.

[0026] By adopting the above technical solution, after installing the detection rotor of the steam seal to be adjusted on the driving frame, first drive the detection rotor to rotate. At the same time, the dial indicator detects the runout condition of the detection rotor and makes adjustments. After bringing the runout error of the detection rotor into a reasonable range, then proceed with the subsequent steps to further reduce the adjustment error.

[0027] In summary, the present utility model includes at least one of the following beneficial technical effects:

[0028] By setting up the fixing mechanism, the whole detection and adjustment process is made more convenient, and at the same time the step of disassembling the steam seal body is omitted, and the shell is directly installed with the steam seal, making the detection and adjustment more accurate.

[0029] By setting up a lifting mechanism, the coaxial accuracy of the steam seal and the detection rotor can be higher, so as to reduce the error of the steam seal adjustment accuracy.

[0030] By setting a centering component, the axial height and position of the steam seal can be accurately obtained, so that the lifting mechanism can be adjusted more accurately, further reducing the gap adjustment error and improving the adjustment effect.

[0031] By setting a translation mechanism, the axis of the steam seal is moved to a suitable position, which further reduces the gap adjustment error and improves the adjustment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0033] Figure 2 yes Figure 1 Schematic cross-sectional view of AA.

[0034] Description of reference numerals: 100, frame; 200, fixing mechanism; 210, fixing frame; 220, placing plate; 230, clamping assembly; 231, clamping plate; 232, first telescopic cylinder; 240, conveying roller; 250, first motor; 300, mounting mechanism; 310, mounting table; 320, driving assembly; 321, driving frame; 322, driving roller; 323, fifth motor; 330, adjusting rod; 340, beating table; 400, control terminal; 500, lifting mechanism; 510, lifting frame; 520, lifting platform; 530, lifting screw; 540, second motor; 550, distance sensor; 560, centering assembly; 561, detection bracket; 562, sensor array; 600, translation mechanism; 610, translation platform; 620, third motor; 630, translation screw; 700, rotating mechanism; 710, rotating platform; 720, fourth motor; 730, locking block; 740, second telescopic cylinder. DETAILED DESCRIPTION

[0035] The following combination Figures 1 to 2 The utility model is described in further detail.

[0036] The utility model discloses a steam turbine steam seal clearance adjustment device. Figures 1 to 2, A steam turbine gland clearance adjustment device mainly includes a frame 100, a fixing mechanism 200, an installation mechanism 300, a control terminal 400, a lifting mechanism 500 and a translation mechanism 600. The fixing mechanism 200, the installation mechanism 300, the control terminal 400, the lifting mechanism 500 and the translation mechanism 600 are all installed on the frame 100. By installing the detection rotor for detection on the installation mechanism 300 and fixing the gland on the fixing mechanism 200, and then moving the fixing mechanism 200 to a suitable detection position through the lifting mechanism 500 and the translation mechanism 600, and then performing detection and adjusting the clearance of the gland, the whole detection and adjustment process becomes more convenient.

[0037] Refer to Figure 1 , The driving assembly 320 includes a driving frame 321, a plurality of driving rollers 322, a fifth motor 323, an adjusting rod 330 and a dial indicator 340. The driving frame 321 is arranged on the frame 100, the driving rollers 322 are arranged on the driving frame 321, the fifth motor 323 is arranged on the driving frame 321, the output shaft of the fifth motor 323 is in transmission connection with the driving roller 322, the fifth motor 323 is electrically connected to the control terminal 400, the adjusting rod 330 is rotatably arranged on the driving frame 321, the dial indicator 340 is arranged on the adjusting rod 330, and the dial indicator 340 is electrically connected to the control terminal 400.

[0038] After installing the detection rotor of the gland to be adjusted on the driving frame 321, first drive the detection rotor to rotate, and at the same time make the dial indicator 340 detect the running condition of the detection rotor and make adjustments. After bringing the running error of the detection rotor into a reasonable range, then perform the subsequent steps to further reduce the adjustment error; after the gland moves to the detection position, drive the driving roller 322 to rotate through the fifth motor 323, and drive the detection rotor corresponding to the gland to rotate, making the detection more convenient.

[0039] Refer to Figure 1 , The translation mechanism 600 includes a translation table 610, a third motor 620 and a translation screw 630. The translation table 610 is slidably arranged on the frame 100, the third motor 620 is arranged on the frame 100, the translation screw 630 is rotatably arranged on the frame 100, the third driving motor is in transmission connection with the translation screw 630, the translation table 610 is threadedly connected to the translation screw 630, the lifting frame 510 is arranged on the translation table 610, and the third motor 620 is electrically connected to the control terminal 400.

[0040] After the gland is fixed, if there is a deviation in the horizontal position, the third motor 620 of the translation mechanism 600 can be driven to move the translation table 610, thereby moving the axis of the gland to a suitable position, further reducing the clearance adjustment error and improving the adjustment effect.

[0041] Refer to Figure 1, the lifting mechanism 500 includes a lifting frame 510, a lifting platform 520, a lifting screw 530, a second motor 540, a distance sensor 550, and a centering component 560. The lifting frame 510 is arranged on the machine frame 100. The lifting platform 520 is slidably arranged on the lifting frame 510. The lifting screw 530 is rotatably arranged on the lifting frame 510. The second motor 540 is arranged on the lifting frame 510. The second motor 540 is in transmission connection with the lifting screw 530. The lifting platform 520 is in threaded connection with the lifting screw 530. The distance sensor 550 is arranged on the lifting platform 520. The second motor 540 and the distance sensor 550 are in electrical signal connection with the control terminal 400.

[0042] Referring to Figure 1 , the centering component 560 includes a detection bracket 561 and a sensor array 562. The detection bracket 561 is fixed to the machine frame 100 by bolts. The sensor array 562 is arranged on the detection bracket 561. The sensor array 562 is in electrical signal connection with the control terminal 400.

[0043] When performing displacement adjustment on the fixing mechanism 200, according to the detection signal of the distance sensor 550, under the regulation of the control terminal 400, the second motor 540 is driven to rotate the lifting screw 530, so that the lifting platform 520 can adjust its height, realizing the adjustment of the steam seal on the fixing mechanism 200 to a proper position, making the coaxial accuracy between the steam seal and the detection rotor higher, and reducing the error of the steam seal adjustment accuracy.

[0044] During the lifting process, the height of the arc diameter surface of the steam seal can be obtained based on the upper end surface of the fixing frame 210. Then, through the signal of the highest point obtained by the sensor array 562, the highest point of the steam seal arc can be obtained. Furthermore, the axial center height and position of the steam seal can be accurately obtained, so that the lifting mechanism 500 can be adjusted more precisely, further reducing the clearance adjustment error and improving the adjustment effect.

[0045] Referring to Figure 1 and Figure 2 , the rotating mechanism 700 includes a rotating platform 710, a fourth motor 720, a locking block 730, and a second telescopic cylinder 740. The rotating platform 710 is rotatably arranged on the lifting platform 520. The fourth motor 720 is arranged on the lifting platform 520. The output shaft of the fourth motor 720 is in transmission connection with the rotating platform 710. The fixing frame 210 is arranged on the rotating platform 710. The fourth motor 720 is in electrical signal connection with the control terminal 400. The locking block 730 is slidably arranged on the lifting platform 520. The other end of the locking block 730 abuts against the rotating platform 710. The second telescopic cylinder 740 is arranged on the lifting platform 520. The locking block 730 is arranged on the telescopic rod of the second telescopic cylinder 740.

[0046] When the steam seal is axially offset after being fixed, the fourth motor 720 in the rotating mechanism 700 can drive the rotating table 710 to rotate, making the axis of the steam seal parallel to the axis of the detection rotor, thereby reducing the detection and adjustment error and improving the adjustment effect. When rotational adjustment is required, the second telescopic cylinder 740 contracts, enabling the rotating table 710 to rotate. After the rotational adjustment is completed, the second telescopic cylinder 740 extends, causing the locking block 730 to abut against the rotating table 710, stopping the rotation of the rotating table 710, thus achieving locking, reducing the possibility of the rotating table 710 rotating again after the rotational adjustment, and further reducing the error.

[0047] Referring to Figure 1 , the fixing mechanism 200 includes a fixing frame 210, a placing plate 220, a plurality of conveying rollers 240, a plurality of first motors 250, and a plurality of clamping assemblies 230;

[0048] Referring to Figure 1 , the fixing frame 210 is arranged on the driving end of the lifting mechanism 500, the placing plate 220 is arranged on the fixing frame 210, the clamping assembly 230 includes a clamping plate 231 and a first telescopic cylinder 232, the first telescopic cylinder 232 is arranged on the fixing frame 210, the clamping plate 231 is arranged on the telescopic rod of the first telescopic cylinder 232, the conveying rollers 240 are rotatably arranged on the placing plate 220, the first motor 250 is arranged on the placing plate 220, the first motor 250 is in transmission connection with the conveying rollers 240, and the first motor 250 is electrically connected to the control terminal 400.

[0049] When installing the steam seal, the steam seal and the steam seal housing are conveyed onto the conveying rollers 240 through the conveying device, and then the first motor 250 drives the conveying rollers 240 to rotate, thereby feeding the steam seal into the fixing frame 210. Under the control of the control terminal 400, the first telescopic cylinder 232 extends, causing the clamping plate 231 to abut against the steam seal housing, and then the clamping assembly 230 clamps the steam seal housing. At the same time, after the adjustment is completed, the steam seal can be sent out from the fixing frame 210 through the conveying rollers 240, making the entire adjustment process more convenient and improving the detection and adjustment efficiency.

[0050] The implementation principle of the steam seal clearance adjustment device for a steam turbine in an embodiment of the present utility model is as follows:

[0051] When it is necessary to detect the clearance of the gland seal, in order to make the detection and adjustment more accurate, it is usually necessary to detect the gland seal together with the installation on the gland seal housing. By placing the outer housing of the fixed gland seal on the fixing frame 210, under the control of the control terminal 400, the first telescopic cylinder 232 extends, so that the clamping plate 231 abuts against the gland seal housing, and then the clamping assembly 230 clamps the gland seal housing. By adjusting the lifting mechanism 500, the gland seal is lifted to facilitate the detection and adjustment personnel to paste the detection tape on the gland seal. Then, the gland seal on the fixing mechanism 200 is adjusted to a suitable detection position. Then, the driving assembly 320 drives the detection rotor to rotate. After the rotation detection is completed, the lifting mechanism 500 lifts the gland seal. Then, the staff observes the clearance distribution between the gland seal and the detection rotor and makes adjustments according to the size of the clearance, making the whole detection and adjustment process more convenient. At the same time, the step of disassembling the gland seal body is omitted, and the gland seal installation housing is directly carried, making the detection and adjustment more accurate.

[0052] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A steam turbine seal clearance adjustment device, characterized in that: The invention comprises a frame (100), a fixing mechanism (200), a mounting mechanism (300), a control terminal (400), and a lifting mechanism (500) for lifting the fixing mechanism (200), wherein the lifting mechanism (500) is arranged on the frame (100), the fixing mechanism (200) comprises a fixing frame (210), a placement plate (220), and a plurality of clamping assemblies (230), the fixing frame (210) is arranged on a driving end of the lifting mechanism (500), the placement plate (220) is arranged on the fixing frame (210), and the clamping assembly (230) comprises a clamping plate (231) and a plurality of clamping assemblies (230). A first telescopic cylinder (232), wherein the first telescopic cylinder (232) is arranged on a fixed frame (210), and the clamping plate (231) is arranged on a telescopic rod of the first telescopic cylinder (232); the mounting mechanism (300) comprises a mounting platform (310) and a driving assembly (320) for driving and detecting the rotation of a rotor, wherein the mounting platform (310) is arranged on a frame (100), and the driving assembly (320) is arranged on the mounting platform (310); the control terminal (400) is arranged on the frame (100), and the fixing mechanism (200) and the lifting mechanism (500) are connected to a controller by electrical signals.

2. A steam turbine seal clearance adjustment device according to claim 1, characterized in that: The fixing mechanism (200) further comprises a plurality of conveying rollers (240) and a plurality of first motors (250); the conveying rollers (240) are rotatably disposed on the placement plate (220); the first motors (250) are disposed on the placement plate (220); the first motors (250) are transmission-connected to the conveying rollers (240); and the first motors (250) are electrically signal-connected to the control terminal (400).

3. The steam turbine seal clearance adjustment device according to claim 1, characterized in that: The lifting mechanism (500) comprises a lifting frame (510), a lifting platform (520), a lifting screw (530), a second motor (540) and a distance sensor (550); the lifting frame (510) is arranged on the frame (100); the lifting platform (520) is slidably arranged on the lifting frame (510); the lifting screw (530) is rotatably arranged on the lifting frame (510); the second motor (540) is arranged on the lifting frame (510); the second motor (540) is transmission-connected to the lifting screw (530); the lifting platform (520) is threadedly connected to the lifting screw (530); the distance sensor (550) is arranged on the lifting platform (520); and the second motor (540) and the distance sensor (550) are electrically connected to the control terminal (400).

4. A steam turbine seal clearance adjustment device according to claim 3, characterized in that: The lifting mechanism (500) further comprises a centering component (560), the centering component (560) comprising a detection bracket (561) and a sensor array (562), the detection bracket (561) being arranged on the frame (100), the sensor array (562) being arranged on the detection bracket (561), and the sensor array (562) being connected to an electrical signal of a control terminal (400).

5. A steam turbine seal clearance adjustment device according to claim 3 or 4, characterized in that: The frame (100) is provided with a translation mechanism (600), the translation mechanism (600) comprising a translation platform (610), a third motor (620) and a translation screw (630), the translation platform (610) being slidably arranged on the frame (100), the third motor (620) being arranged on the frame (100), the translation screw (630) being rotatably arranged on the frame (100), the third motor (620) being transmission-connected to the translation screw (630), the translation platform (610) being threadedly connected to the translation screw (630), the lifting frame (510) being arranged on the translation platform (610), and the third motor (620) being electrically signal-connected to a control terminal (400).

6. The steam turbine seal clearance adjustment device according to claim 3, characterized in that: The lifting platform (520) is provided with a rotating mechanism (700), the rotating mechanism (700) comprising a rotating platform (710) and a fourth motor (720), the rotating platform (710) being rotatably arranged on the lifting platform (520), the fourth motor (720) being arranged on the lifting platform (520), the output shaft of the fourth motor (720) being transmission-connected with the rotating platform (710), the fixing frame (210) being arranged on the rotating platform (710), and the fourth motor (720) being electrically signal-connected with the control terminal (400).

7. A steam turbine seal clearance adjustment device according to claim 6, characterized in that: The rotating mechanism (700) further comprises a locking block (730) and a second telescopic cylinder (740); the locking block (730) is slidably arranged on the lifting platform (520); the other end of the locking block (730) is in contact with the rotating platform (710); the second telescopic cylinder (740) is arranged on the lifting platform (520); and the locking block (730) is arranged on the telescopic rod of the second telescopic cylinder (740).

8. The steam turbine seal clearance adjustment device according to claim 1, characterized in that: The driving assembly (320) comprises a driving frame (321), a plurality of driving rollers (322) and a fifth motor (323); the driving frame (321) is arranged on the frame (100); the driving rollers (322) are arranged on the driving frame (321); the fifth motor (323) is arranged on the driving frame (321); an output shaft of the fifth motor (323) is drivingly connected to the driving rollers (322); and the fifth motor (323) is electrically signal-connected to a control terminal (400).

9. The steam turbine seal clearance adjustment device according to claim 1, characterized in that: The mounting mechanism (300) further comprises an adjusting rod (330) and a beat meter (340), wherein the adjusting rod (330) is rotatably mounted on the driving frame (321), the beat meter (340) is mounted on the adjusting rod (330), and the beat meter (340) is electrically signal-connected to the control terminal (400).

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