Device for measuring thickness of trailing edge of turbine rotor blade

Abstract

The utility model relates to a device for measuring the thickness of the trailing edge of a turbine rotor blade. The device comprises a bottom plate and a measuring structure, and a sleeve is sleeved outside a stand column. One end of the gauge stand is sleeved on the top of the stand column in a vertically moving mode and installed above the sleeve, the other end of the gauge stand is connected with a support, a first positioning pin is arranged on one side of the support, a second positioning pin is arranged on the other side of the support, and the measuring end of the measuring pin penetrates through the benchmarking block to abut against the end portion of the first positioning pin. The movable end of the measuring pin penetrates through the benchmarking block and abuts against a pointer of the dial indicator, the elastic piece is arranged outside the movable end of the measuring pin in a sleeved mode, one end of the elastic piece abuts against the rear face of the measuring end of the measuring pin, and the other end of the elastic piece abuts against the inner wall of the benchmarking block. By means of the structure, the problems that an existing turbine blade casting surface detection method is complex in operation, consumes materials and labor, and is slow in operation and long in period are solved. And the problems of poor intuition and high possibility of position deviation risk are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation engine blade processing, in particular to a device for measuring the thickness of the trailing edge of a turbine rotor blade. Background Art

[0002] The structural characteristics of aircraft engine turbine blades are relatively complex. Among them, the more conventional measurement is the measurement of the blade plane characteristics, but the special characteristics of the blade structure require more than that. The thickness of part of the blade body also needs to be measured.

[0003] At present, the methods for inspecting the casting surface of turbine blades include three-coordinate inspection, blue light scanning or pallet measurement. Three-coordinate inspection is complicated to operate, consumes materials and labor, and is slow and has a long cycle. Pallet measurement is not intuitive enough and is prone to the risk of position deviation. Utility Model Content

[0004] The utility model provides a device for measuring the thickness of the trailing edge of a turbine rotor blade, which solves the problem that the existing methods for detecting the casting surface of turbine blades include three-coordinate detection, blue light scanning or measurement using a card plate. The three-coordinate detection is complex to operate, consumes materials and labor, and is slow to operate and has a long cycle. The card plate measurement is not intuitive enough and is prone to the risk of position deviation.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A column is arranged on the bottom plate, and a sleeve is sleeved on the outer surface of the column.

[0007] The measuring structure includes a table frame, a support and a dial indicator. One end of the table frame is movably mounted on the top of the column, and the table frame is installed above the sleeve. The other end of the table frame is connected to the support. A first positioning pin is provided on one side of the support, and a second positioning pin is provided on the other side. The table frame has a marking portion, and the marking portion has a marking block, a measuring pin and an elastic member. One end of the measuring pin passes through one side of the marking block and is abutted against the end of the first positioning pin, and the other end of the measuring pin passes through the other side of the marking block. The elastic member is mounted on the outer wall of the measuring pin, and the needle of the dial indicator is abutted against the moving end of the measuring pin.

[0008] The beneficial effects of the utility model are as follows: a sleeve is sleeved on the outside of the column, and the height of the sleeve can be replaced according to the height of the blade body. The height of the sleeve is accurate and has a small tolerance, and the height of the meter frame can be accurately measured, and the meter frame can be supported. The meter frame can move up and down on the column, and the height of the meter frame is determined by the height of the sleeve. The measuring pin can move horizontally relative to the calibration block, and the measuring pin can automatically press against the first positioning pin under the action of the elastic force of the elastic part. When the thickness calibration block is placed between the measuring pin and the first positioning pin, the measuring pin moves backward and pushes the needle of the dial indicator to move. At the same time, the second positioning pin limits the depth of the thickness calibration block. Then, the dial indicator is adjusted to zero, and the thickness calibration block is taken out after the dial indicator is adjusted to zero, completing the "calibration" work.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the diameter of the upper end of the column is smaller than the diameter of the lower end, and the column and the sleeve are clearance-matched.

[0011] The beneficial effect of adopting the above further solution is that the diameter of the upper end of the column is smaller than the diameter of the lower end, the lower end of the column can limit the sleeve, and the clearance between the column and the sleeve is matched, which facilitates the replacement of the sleeve.

[0012] On the basis of the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, the sleeve is detachably mounted on the column, and the height of the sleeve is adapted to the height of the blade body.

[0014] The beneficial effect of adopting the above further solution is that the height of the sleeve is adapted to the height of the blade body, the sleeve can be set to a height adapted to the height of the blade body according to the requirements of the design drawings, and the sleeve can be replaced during measurement. Due to the accurate accuracy and small tolerance of the sleeve, the measured value is more accurate.

[0015] On the basis of the above technical solution, the present invention can also be improved as follows.

[0016] Furthermore, the meter frame is rotatably mounted on the column and is locked on the column by a locking member.

[0017] The beneficial effect of adopting the above further solution is that the meter frame is rotatably set on the column, and the position angle of the thickness meter block can be adjusted by rotating the meter frame to determine the position of the meter frame and the appropriate position for measuring the blade.

[0018] On the basis of the above technical solution, the present invention can also be improved as follows.

[0019] Furthermore, the measuring pin is movable relative to the alignment block, the measuring pin and the first positioning pin move relative to each other, and a thickness alignment block is arranged between the measuring pin and the first positioning pin.

[0020] The beneficial effect of adopting the above further scheme is that when the thickness alignment block is inserted between the measuring pin and the first locating pin, the measuring pin moves horizontally on the alignment block in a direction away from the first locating pin, so as to better insert the thickness alignment block between the measuring pin and the first locating pin.

[0021] On the basis of the above technical solution, the present invention can also be improved as follows.

[0022] Furthermore, the marking part also has a pull pin, a sliding groove is opened on the upper part of the marking block, the pull pin is movably arranged in the sliding groove, and the bottom of the pull pin is connected to the measuring pin.

[0023] The beneficial effect of adopting the above further solution is that the pull pin can be manually pushed to move in the sliding groove, pulling the measuring pin to a position away from the first positioning pin, making it convenient to place the thickness calibration block between the measuring pin and the first positioning pin.

[0024] On the basis of the above technical solution, the present invention can also be improved as follows.

[0025] Furthermore, the elastic member is a spring.

[0026] The beneficial effect of adopting the above further solution is that the elastic member is a spring, and after the thickness gauge block is removed, the measuring pin can automatically return to the position abutting against the first positioning pin under the elastic action of the spring.

[0027] On the basis of the above technical solution, the present invention can also be improved as follows.

[0028] Furthermore, the first locating pin and the second locating pin are interference-fitted on both sides of the support, and the end of the first locating pin is perpendicular to the end of the second locating pin.

[0029] The beneficial effect of adopting the above further solution is that the end of the first positioning pin is perpendicular to the end of the second positioning pin, which can limit the depth of the thickness gauge block and the blade inserted between the measuring pin and the first positioning pin.

[0030] On the basis of the above technical solution, the present invention can also be improved as follows.

[0031] Furthermore, a clamping structure is also provided on the base plate, and the clamping structure includes a toothed positioning block, a toothed clamping block, and a clamping handle. The toothed positioning block is movably installed on the base plate, the toothed clamping block is arranged on the toothed positioning block through a connecting piece, and the clamping handle is rotatably installed on the toothed clamping block. The upper ends of the toothed positioning block and the toothed clamping block both have toothed grooves, and the toothed grooves of the toothed positioning block and the toothed grooves of the toothed clamping block are relatively opened.

[0032] The beneficial effect of adopting the above further scheme is that by rotating the clamping handle, the toothed clamping block and the toothed positioning block are separated or clamped. When the toothed clamping block and the toothed positioning block are separated, it is convenient to place or remove the blade. When the toothed clamping block and the toothed positioning block are clamped, the blade can be clamped and fixed. At the same time, the upper ends of the toothed clamping block and the toothed positioning block are both provided with toothed grooves, which can fix the blade placed between the toothed clamping block and the toothed positioning block to prevent the blade from moving in series, and facilitate measurement.

[0033] On the basis of the above technical solution, the present invention can also be improved as follows.

[0034] Furthermore, the connecting piece is a screw or a pin, and the toothed pressing block and the toothed positioning block move relative to each other.

[0035] The beneficial effect of adopting the above further solution is that the connecting member drives the toothed pressing block and the toothed positioning block to move relative to each other through the rotation of the pressing handle, thereby preventing the blades from being strung when being inserted, thereby avoiding damage to the blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic structural diagram of a device for measuring the thickness of the trailing edge of a turbine rotor blade according to the utility model when in operation;

[0037] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0038] Figure 3 It is a schematic diagram of the side structure of the utility model;

[0039] Figure 4 This is a side structural diagram of the utility model when the blades are installed;

[0040] Figure 5 It is a front schematic diagram of the utility model;

[0041] Figure 6 It is a schematic diagram of the measuring structure of the utility model;

[0042] Figure 7 It is a cross-sectional view of the measurement structure of the utility model;

[0043] Figure 8 It is a structural schematic diagram of the clamping structure of the utility model.

[0044] In the accompanying drawings, the list of components represented by each reference numeral is as follows: 100-base plate; 110-column; 130-sleeve; 300-measuring structure; 310-meter frame; 311-locking member; 313-calibration part; 3131-calibration block; 31311-sliding groove; 3133-measuring pin; 3135-elastic member; 3137-pull pin; 330-support; 331-first positioning pin; 333-second positioning pin; 350-dial indicator; 351-pointer; 370-thickness calibration block; 500-clamping structure; 510-toothed positioning block; 530-toothed clamping block; 531-connecting member; 533-toothed groove; 550-clamping handle. DETAILED DESCRIPTION

[0045] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0046] Example 1

[0047] like Figure 1-8 As shown, a column 110 is disposed on the bottom plate 100 , and a sleeve 130 is sleeved on the outer surface of the column 110 .

[0048] The measuring structure 300 includes a meter frame 310, a support 330 and a dial indicator 350. One end of the meter frame 310 is movably mounted on the top of the column 110, and the meter frame 310 is installed above the sleeve 130. The other end of the meter frame 310 is connected to the support 330. A first positioning pin 331 is provided on one side of the support 330, and a second positioning pin 333 is provided on the other side. The meter frame 310 has a marking portion 313. The marking portion 313 has a marking block 3131, a measuring pin 3133 and an elastic member 3135. One end of the measuring pin 3133 passes through one side of the marking block 3131 and abuts against the end of the first positioning pin 331. The other end of the measuring pin 3133 passes through the other side of the marking block 3131. The elastic member 3135 is sleeved on the outer wall of the moving end of the measuring pin 3133. The needle 351 of the dial indicator 350 abuts against the moving end of the measuring pin 3133.

[0049] Specifically, first move the meter frame 310 to the top of the column 110, then select the sleeve 130 that matches the blade body and set it on the outside of the column 110, and then adjust the height of the meter frame 310 so that the bottom of the meter frame 310 is in contact with the top of the sleeve 130. According to the requirements of the design drawings, select the trailing edge thickness alignment block 370 at a fixed height, and the thickness value of the thickness alignment block 370 is between C2-0.25 and C2+0.15. Insert the thickness alignment block 370 between the measuring pin 3133 and the first positioning pin 331, and the second positioning pin 333 is against the surface of the thickness alignment block 370. The insertion depth of the thickness alignment block 370 is limited to the value of D being 1.6. When the thickness alignment block 370 is inserted between the measuring pin 3133 and the first positioning pin 331, the measuring pin 3133 moves horizontally backward relative to the alignment block 3131 under the push of the thickness alignment block 370, and the rear end of the measuring pin 3133 pushes the needle 351 of the dial indicator 350 to move, and then the value of the dial indicator 350 is adjusted to zero, completing the zeroing work of the dial indicator 350.

[0050] like Figure 1-8 As shown, the diameter of the upper end of the column 110 is smaller than the diameter of the lower end, and the column 110 and the sleeve 130 are clearance-matched.

[0051] Specifically, the sleeve 130 is sleeved on the upper end of the column 110, the diameter of the lower end of the column 110 is larger than the diameter of the upper end, and at the same time, the diameter of the lower end of the column 110 is also larger than the diameter of the sleeve 130. The lower end of the column 110 limits the lower end of the sleeve 130, so that the sleeve 130 is better fixed on the column 110.

[0052] like Figure 1-8 As shown, the sleeve 130 is detachably mounted on the column, and the height of the sleeve 130 is adapted to the height of the blade body.

[0053] Specifically, the sleeve 130 can be set to a height that matches the height of the blade body according to the requirements of the design drawings, and during measurement, the matching sleeve 130 is replaced and installed.

[0054] like Figure 1-8 As shown, the watch frame 310 is rotatably mounted on the column 110 and is locked on the column 110 by a locking member 311 .

[0055] Specifically, the meter frame 310 can be rotated on the column 110 to adjust the measuring angle of the meter frame 310. After the height and angle are adjusted, the meter frame 310 is locked on the column 110 by the locking member 311 for fixation.

[0056] like Figure 1-8As shown, the measuring pin 3133 is movable relative to the alignment block 3131 , the measuring pin 3133 and the first positioning pin 331 move relative to each other, and a thickness alignment block 370 is provided between the measuring pin 3133 and the first positioning pin 331 .

[0057] Specifically, in this embodiment, the thickness of the thickness alignment block 370 is different according to the requirements set in the drawing, and the thickness alignment block 370 has multiple blocks, and the thickness value C2 of each thickness alignment block 370 is between C2-0.25 and C2+0.15. When the thickness alignment block 370 is inserted between the measuring pin 3133 and the first positioning pin 331, the measuring pin 3133 moves horizontally backward on the alignment block 3131 in a direction away from the first positioning pin 331, so as to better insert the thickness alignment block 370 between the measuring pin 3133 and the first positioning pin 331.

[0058] like Figure 1-8 As shown, the marking portion 313 further has a pull pin 3137 , a sliding groove 31311 is provided on the upper portion of the marking block 3131 , the pull pin 3137 is movably disposed in the sliding groove 31311 , and the bottom of the pull pin 3137 is connected to the measuring pin 3133 .

[0059] Specifically, when inserting the thickness alignment block 370 or the blade between the measuring pin 3133 and the first positioning pin 331, the pull pin 3137 can be manually pushed to push the measuring pin 3133 backward. After the thickness alignment block 370 or the blade is inserted between the measuring pin 3133 and the first positioning pin 331, the pull pin 3137 is released, and the measuring pin 3133 moves forward under the elastic action of the elastic member 3135 until it abuts against the first positioning pin 331.

[0060] like Figure 1-8 As shown, the elastic member 3135 is a spring.

[0061] Specifically, in the present embodiment, the elastic member 3135 is a spring, and the resilience of the spring can better rebound the measuring pin 3133 to abut against the first positioning pin 331 .

[0062] like Figure 1-8 As shown, the first positioning pin 331 and the second positioning pin 333 are arranged on both sides of the support 330 by interference fit, and the end of the first positioning pin 331 is perpendicular to the end of the second positioning pin 333.

[0063] Specifically, in this embodiment, the shape of the support 330 is L-shaped. The first positioning pin 331 is set on one side of the manufacturing, and the pin end of the first positioning pin 331 is horizontally abutted against the pin end of the measuring pin 3133. The second positioning pin 333 is set on the other side of the support 330, and the pin end of the second positioning pin 333 is perpendicular to the pin end of the first positioning pin 331. The second positioning pin 333 abuts against the surface of the thickness table block 370 or the blade insertion, which plays a role in limiting the insertion depth of the thickness table block 370 and the blade.

[0064] like Figure 1-8 As shown, a clamping structure 500 is also provided on the base plate 100, and the clamping structure 500 includes a toothed positioning block 510, a toothed clamping block 530, and a clamping handle 550. The toothed positioning block 510 is movably installed on the base plate 100, the toothed clamping block 530 is arranged on the toothed positioning block 510 through a connecting piece 531, and the clamping handle 550 is rotatably installed on the toothed clamping block 530. The upper ends of the toothed positioning block 510 and the toothed clamping block 530 both have a toothed groove 533, and the toothed groove 533 of the toothed positioning block 510 and the toothed groove 533 of the toothed clamping block 530 are opened relative to each other.

[0065] Specifically, rotate the clamping handle 550 to move the toothed clamping block 530 away from the toothed positioning block 510, then insert the tenon of the blade into the toothed groove 533 between the toothed clamping block 530 and the toothed positioning block 510, then rotate the clamping handle 550 to move the toothed clamping block 530 toward the toothed positioning block 510, and finally, clamp and fix the tenon of the blade. Then, push the toothed positioning block 510 to push the tail of the blade between the measuring pin 3133 and the first positioning pin 331. The design drawing requires that the theoretical depth value of the blade to be measured is 1.6, and the theoretical height value of the blade section to be measured is D. D and 1.6 together limit the point to be measured to C2. The thickness measurement value C2 of the tail end of the blade is any value between C2-0.25 and C2+0.15, or is equal to the value C2-0.25 or C2+0.15, and the thickness of the blade is qualified. When the blade tail is inserted into the measuring pin 3133 and the first positioning pin 331 at an angle of 45°, the C2 value of the blade is the smallest. If the value exceeds the range of C2-0.25 to C2+0.15, it is unqualified.

[0066] like Figure 1-8 As shown, the connecting member 531 is a screw or a pin, and the toothed pressing block 530 and the toothed positioning block 510 move relative to each other.

[0067] Specifically, the connecting member 531 drives the toothed clamping block 530 to move parallel to the toothed positioning block 510 through the rotation of the clamping handle 550. When separated, the tenon of the blade is inserted into the toothed groove 533 of the toothed clamping block 530 and the toothed positioning block 510. When clamped, the tenon of the blade can be tightened and fixed.

[0068] The beneficial effect of this embodiment is that by sleeve 130 being sleeved outside the column 110, the height of sleeve 130 can be replaced according to the height of the blade body, the height of sleeve 130 is accurate, the tolerance is small, the height of meter stand 310 can be accurately measured, and the meter stand 310 can be supported. The meter stand 310 rotates relative to the column 110, and the position of meter stand 310 to measure the thickness of the tail of the blade can be adjusted. After adjusting the position, the dial gauge 350 is zeroed by selecting the appropriate thickness gauge block 370. Then, the tenon of the blade is tightened and fixed by the toothed pressing block 530 and the toothed positioning block 510, and then the tail of the blade is pushed between the measuring pin 3133 and the first positioning pin 331. Observe the value of the dial gauge 350, the thickness measurement value C2 of the tail end of the blade is any value between C2-0.25 and C2+0.15, or is equal to the value C2-0.25 or C2+0.15, and the thickness of the blade is qualified. When the blade tail is inserted into the measuring pin 3133 and the first positioning pin 331 at an angle of 45°, the C2 value of the blade is the smallest. If the value exceeds the range of C2-0.25 to C2+0.15, it is unqualified. The blade measurement is simple and easy, durable, and the blade measurement efficiency is improved to ensure product quality.

[0069] The working process of this embodiment is as follows: the measuring tool is designed according to the six-point positioning method, the table frame 310 is first moved to the top of the column 110, then the sleeve 130 adapted to the blade body is selected and set outside the column 110, and then the height of the table frame 310 is adjusted so that the bottom of the table frame 310 is in contact with the top of the sleeve 130. According to the requirements of the design drawings, the trailing edge thickness table block 370 at a fixed height is selected, and the thickness value of the thickness table block 370 is between C2-0.25 and C2+0.15, or equal to the value C2-0.25 or C2+0.15. The thickness table block 370 is inserted between the measuring pin 3133 and the first positioning pin 331, and the second positioning pin 333 is against the surface of the thickness table block 370. According to the design drawing requirements, the theoretical depth value of the blade to be measured is 1.6, and the theoretical height value of the blade section to be measured is D. D and 1.6 together limit the point to be measured to be C2. When the thickness alignment block 370 is inserted between the measuring pin 3133 and the first positioning pin 331, the measuring pin 3133 moves back horizontally relative to the alignment block 3131 under the push of the thickness alignment block 370, and the rear end of the measuring pin 3133 pushes the needle 351 of the dial gauge 350 to move, and then the value of the dial gauge 350 is adjusted to zero, completing the work of zeroing the dial gauge 350. Then, the clamping handle 550 is rotated to move the toothed clamping block 530 away from the toothed positioning block 510, and the tenon of the blade is clamped into the toothed groove 533 between the toothed clamping block 530 and the toothed positioning block 510, and the blade is positioned and clamped using the full teeth of the toothed block, and then the clamping handle 550 is rotated to move the toothed clamping block 530 toward the toothed positioning block 510, and finally, the tenon of the blade is clamped and fixed. Then, find the position where the tail of the blade is pushed in, push the toothed positioning block 510, and push the tail of the blade between the measuring pin 3133 and the first positioning pin 331. According to the design drawing, the theoretical depth value of the blade to be measured is 1.6, and the theoretical height value of the blade section to be measured is D. D and 1.6 together limit the point to be measured, which is C2. The thickness measurement value C2 of the tail end of the blade is any value between C2-0.25 and C2+0.15, or equal to C2-0.25 or C2+0.15. The thickness of the blade is qualified. When the angle between the measuring pin 3133 and the first positioning pin 331 where the tail of the blade is inserted is inclined at 45°, the C2 value of the blade is the smallest. Values ​​outside the range of C2-0.25 to C2+0.15 are unqualified.

[0070] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for measuring the thickness of the trailing edge of a turbine rotor blade, characterized in that: include A bottom plate (100), wherein a column (110) is disposed on the bottom plate (100), and a sleeve (130) is sleeved on the outer surface of the column (110); A measuring structure (300) comprising a meter frame (310), a support (330) and a dial indicator (350); one end of the meter frame (310) is mounted on the top of the column (110) in a manner that it can move up and down, and the meter frame (310) is installed above the sleeve (130); the other end of the meter frame (310) is connected to the support (330); one side of the support (330) is provided with a first positioning pin (331), and the other side is provided with a second positioning pin (333); the meter frame (310) has a marking portion ( 313), the marking portion (313) comprises a marking block (3131), a measuring pin (3133) and an elastic member (3135), one end of the measuring pin (3133) passes through one side of the marking block (3131) and abuts against the end of the first positioning pin (331), the other end of the measuring pin (3133) passes through the other side of the marking block (3131), the elastic member (3135) is sleeved on the outer wall of the measuring pin (3133), and the needle (351) of the dial indicator (350) abuts against one end of the measuring pin (3133).

2. The device for measuring the thickness of the trailing edge of a turbine rotor blade according to claim 1, characterized in that: The diameter of the upper end of the column (110) is smaller than the diameter of the lower end, and the column (110) and the sleeve (130) are clearance-matched.

3. The device for measuring the thickness of the trailing edge of a turbine rotor blade according to claim 1, characterized in that: The sleeve (130) is detachably mounted on the column (110), and the height of the sleeve (130) is adapted to the height of the blade body.

4. The device for measuring the thickness of the trailing edge of a turbine rotor blade according to claim 1, characterized in that: The meter frame (310) is rotatably mounted on the column (110) and is locked on the column (110) via a locking member (311).

5. The device for measuring the thickness of the trailing edge of a turbine rotor blade according to claim 1, characterized in that: The measuring pin (3133) is movable relative to the alignment block (3131), the measuring pin (3133) and the first positioning pin (331) move relative to each other, and a thickness alignment block (370) is provided between the measuring pin (3133) and the first positioning pin (331).

6. The device for measuring the thickness of the trailing edge of a turbine rotor blade according to claim 1, characterized in that: The alignment part (313) further comprises a pull pin (3137), a sliding groove (31311) is provided on the upper part of the alignment block (3131), the pull pin (3137) is movably arranged in the sliding groove (31311), and the bottom of the pull pin (3137) is connected to the measuring pin (3133).

7. The device for measuring the thickness of the trailing edge of a turbine rotor blade according to claim 1, characterized in that: The elastic member (3135) is a spring.

8. The device for measuring the thickness of the trailing edge of a turbine rotor blade according to claim 1, characterized in that: The first positioning pin (331) and the second positioning pin (333) are arranged on both sides of the support (330) in an interference fit, and the end of the first positioning pin (331) is perpendicular to the end of the second positioning pin (333).

9. The device for measuring the thickness of the trailing edge of a turbine rotor blade according to claim 1, characterized in that: The base plate 100 is also provided with a clamping structure (500), and the clamping structure (500) includes a toothed positioning block (510), a toothed pressing block (530), and a pressing handle (550). The toothed positioning block (510) is movably mounted on the base plate (100), the toothed pressing block (530) is arranged on the toothed positioning block (510) through a connecting piece (531), and the pressing handle (550) is rotatably mounted on the toothed pressing block (530). The upper ends of the toothed positioning block (510) and the toothed pressing block (530) are both provided with a toothed groove (533), and the toothed groove (533) of the toothed positioning block (510) and the toothed groove (533) of the toothed pressing block (530) are arranged opposite to each other.

10. The device for measuring the thickness of the trailing edge of a turbine rotor blade according to claim 9, characterized in that: The connecting piece (531) is a screw or a pin, and the toothed pressing block (530) and the toothed positioning block (510) move relative to each other.

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