A measuring and positioning method and tooling for the air film holes of the stationary blades of a gas turbine

Abstract

The present invention relates to the technical field of gas turbine stator blade measurement, specifically a method and tooling for measuring and positioning the air film holes of gas turbine stator blades; the driving motor controls the arc plate to rotate clockwise. During the process, the cleaning member will first clean the surface of the gas turbine stator blade, and then the measuring instrument will detect along the cleaning track of the cleaning member; and during this process, the cleaning member can clean the air film holes on the surface of the gas turbine stator blade, and during the contact process, the bristles on the cleaning member can be embedded into the air film holes to achieve the cleaning of the air film holes, avoiding the problem of reduced detection accuracy caused by the blockage of the air film holes; thereby improving the detection and positioning accuracy of the air film holes on the gas turbine stator blades; after the detection is completed, the measuring instrument resets, and the springs in the sliding grooves reset the first arc rod and the second arc rod.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbine stator blade measurement, and specifically relates to a method and tooling for measuring and positioning the air film holes of gas turbine stator blades. Background Art

[0002] As an important power equipment, gas turbines play a key role in energy conversion and power output. Gas turbine stator blades and the air film holes on the stator blades are important components of gas turbines, and their performance and quality directly affect the overall performance of gas turbines;

[0003] Among them, the gas turbine stator blade is a stationary component in the gas turbine, usually installed in components such as compressors, combustion chambers, and turbines; in the compressor, the stator blade plays a role in guiding the air flow, increasing the air pressure, and controlling the air flow direction. By reasonably designing the shape and angle of the stator blade, the air can enter the next stage of the compressor more evenly, improving the efficiency and stability of the compressor;

[0004] The air film holes on the gas turbine stator blade are tiny holes opened on the surface of the stator blade, mainly used to achieve air film cooling; the air film cooling technology forms a layer of cooling air film on the surface of the stator blade, separating the high-temperature gas from the base material of the stator blade, thereby reducing the temperature of the stator blade and improving its high-temperature resistance and service life; the design parameters of the air film holes, such as the hole diameter, hole pitch, hole distribution, and angle, have an important impact on the air film cooling effect;

[0005] Therefore, after the production of the gas turbine stator blade is completed, it is crucial to position and detect the stator blade holes on the gas turbine. In the existing process of detecting the air film holes of gas turbine stator blades, the visual inspection method is usually used. That is, the inspectors directly observe the appearance of the air film holes with the help of simple tools such as magnifying glasses and endoscopes; use the naked eye or magnifying glass to check whether there are obvious defects such as cracks, deformations, and blockages on the surface of the air film holes; the endoscope can penetrate into the interior of the air film holes to check the condition of the hole wall; its advantages are simple operation, low cost, and the ability to quickly detect obvious defects; but the disadvantages are also obvious. The detection accuracy is limited, it is difficult to detect tiny cracks or internal defects, and the detection results are greatly affected by the experience and subjective factors of the inspectors.

[0006] In summary, to solve the technical problems proposed in this article, the present invention proposes a method and tooling for measuring and positioning the air film holes of gas turbine stator blades. Summary of the Invention

[0007] The present invention proposes a tooling for measuring and positioning the air film holes of gas turbine stator blades; this positioning tooling includes a measurement platform, and the measurement platform includes:

[0008] A body

[0009] The clamping tooling is arranged inside the machine body and is used for clamping workpieces.

[0010] The driving plate is arranged inside the machine body, and the middle part of its upper end is connected to the driving motor arranged at the upper end of the machine body.

[0011] There are two telescopic devices I, which are arranged on the lower sides of both ends of the driving plate and are located outside the clamping tooling.

[0012] The telescopic device II is arranged at one end close to the clamping tooling under each telescopic device I.

[0013] There are two connecting blocks, and each connecting block is arranged at the output end of the telescopic device II.

[0014] The arc-shaped plate has its two ends rotatably connected to the two connecting blocks respectively, and the middle part of the arc-shaped plate protrudes towards the end away from the clamping tooling; a measuring instrument is slidably connected to the arc-shaped plate.

[0015] As a preferred solution of the present application, a through groove is opened in the middle part of the arc-shaped plate. In the initial state, the measuring instrument is located in the middle of the through groove.

[0016] As a preferred solution of the present application, a sliding groove is opened in the inner wall of the through groove. Two sliding shafts are slidably connected to both ends inside the sliding groove, and springs are arranged between the sliding shafts and the sliding groove; an arc-shaped rod I is sleeved on the sliding shaft close to the measuring instrument, an arc-shaped rod II is sleeved on the sliding shaft far from the measuring instrument, the mutually approaching ends of the arc-shaped rod I and the arc-shaped rod II are hinged through a rotating shaft, sleeve plates are arranged at both ends of the rotating shaft, and cleaning parts are arranged on the outer walls of the sleeve plates.

[0017] As a preferred solution of the present application, a sliding rail is arranged at the lower end of the connecting block, the lower end of the connecting block is slidably connected to the sliding rail, and the telescopic end of the telescopic device II is connected to the sliding rail.

[0018] As a preferred solution of the present application, a moving block is slidably connected inside the through groove, and the measuring instrument is arranged on the moving block.

[0019] As a preferred solution of the present application, a micro motor is arranged inside the moving block, and a driving wheel is arranged on the micro motor; a driving ring is arranged at the outer end of the moving block, the inner ring of the driving ring is slidably connected to both ends of the moving block, and the arc-shaped plate is simultaneously located in the inner ring of the driving ring. A driving groove is opened in the middle of the inner ring of the driving ring, the driving wheel is located inside the driving groove, and the measuring instrument is arranged on the outer wall of the driving ring.

[0020] As a preferred solution of the present application, rollers are arranged at the upper and lower ends of the moving block, and the rollers between the upper and lower ends of the moving block are in contact with the inner wall of the driving ring.

[0021] A method for measuring and positioning the air film holes of a gas turbine stator blade, which is applicable to the above-mentioned measuring and positioning tooling for the air film holes of a gas turbine stator blade. This method includes the following steps;

[0022] S1: First, the staff opens the hatch on the body, rotates the control arc plate by 90°, and the middle part of the arc plate is curved away from the clamping end; then installs the gas turbine stator blade on the clamping tooling; then the driving motor rotates, and the driving motor drives the driving plate to rotate;

[0023] S2: During the process of the driving motor driving the driving plate to rotate, the driving plate drives the telescopic device one and the telescopic device two at both ends to rotate, and the telescopic device two drives the arc plate to rotate through the connecting block; so that the arc plate rotates on the outer circumference of the clamping tooling. During the process, the measuring instrument on the arc plate performs positioning detection on the gas turbine stator blade and the air film holes above it;

[0024] S3: During the rotation of the driving motor, the two telescopic devices contract upward synchronously, so that during the rotation of the arc plate, it moves uniformly from the lower side to the upper side of the gas turbine stator blade, realizing a comprehensive scanning detection of the gas turbine stator blade and the air film holes above it, and transmitting the detection data to the display panel on the body; so that the staff can obtain accurate specific data.

[0025] The beneficial effects of the present invention are as follows:

[0026] The driving motor controls the arc plate to rotate clockwise. During the process, the cleaning part will first clean the surface of the gas turbine stator blade, and then the measuring instrument will detect along the cleaning track of the cleaning part; and during this process, the cleaning part can clean the air film holes on the surface of the gas turbine stator blade, and during the contact process, the bristles on the cleaning part can be embedded into the air film holes to realize the cleaning of the air film holes, avoiding the problem of reduced detection accuracy caused by the blockage of the air film holes; thereby improving the detection and positioning accuracy of the air film holes on the gas turbine stator blade; after the detection is completed, the measuring instrument resets, and the springs in the sliding grooves reset the arc rod one and the arc rod two. Description of the Drawings

[0027] Figure 1 is the three-dimensional view of the body in the present invention;

[0028] Figure 2 is another perspective view of the body in the present invention;

[0029] Figure 3 is Figure 2 the front view in

[0030] Figure 4 is the partial sectional view of the body in the present invention;

[0031] Figure 5 is Figure 4 Structural view of the telescopic device 1 and the arc plate in the present invention;

[0032] Figure 6 is the structural view of the slide rail and the telescopic device 2 in the present invention;

[0033] Figure 7 is the structural view of the through groove in the present invention;

[0034] Figure 8 is the cross-sectional view of the driving wheel and the moving block in the present invention;

[0035] Figure 9 is the structural view of the moving block in the present invention;

[0036] Figure 10 is the structural view of the arc rod 1 and the arc rod 2 in the present invention;

[0037] Figure 11 is the structural view of the sleeve plate and the cleaning member in the present invention;

[0038] Figure 12 is the method flow chart in the present invention.

[0039] In the figure: machine body 1, clamping tooling 11, driving plate 12, driving motor 121, telescopic device 1 13, telescopic device 2 14, connecting block 141, arc plate 142, measuring instrument 2, through groove 15, sliding groove 151, arc rod 1 152, arc rod 2 153, rotating shaft 154, sleeve plate 155, cleaning member 156, slide rail 157, moving block 16, driving wheel 161, driving ring 162, driving groove 163, roller 164. Specific embodiments

[0040] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0041] Embodiment 1:

[0042] As Figures 1 to 11 shown; a measurement and positioning tooling for the gas turbine stator vane film holes; the positioning tooling includes a measurement platform, and the measurement platform includes:

[0043] Machine body 1,

[0044] Clamping tooling 11, which is arranged inside the machine body 1 and is used for clamping workpieces;

[0045] Driving plate 12, which is arranged inside the machine body 1, and the middle part of its upper end is connected to the driving motor 121 arranged at the upper end of the machine body 1;

[0046] The first telescopic device 13, with a quantity of two, is arranged on the lower sides of both ends of the driving plate 12; and is located outside the clamping tooling 11;

[0047] The second telescopic device 14 is arranged at one end close to the clamping tooling 11 under each first telescopic device 13;

[0048] The connecting blocks 141, with a quantity of two, and each connecting block 141 is arranged at the output end of the second telescopic device 14;

[0049] The arc-shaped plate 142, whose two ends are respectively rotatably connected to the two connecting blocks 141, and the middle part of the arc-shaped plate 142 bulges towards the end away from the clamping tooling 11; a measuring instrument 2 is slidably connected to the arc-shaped plate 142;

[0050] A through groove 15 is opened in the middle part of the arc-shaped plate 142. In the initial state, the measuring instrument 2 is located in the middle of the through groove 15;

[0051] The inner wall of the through groove 15 is provided with a sliding groove 151. Two sliding shafts are slidably connected to both ends inside the sliding groove 151, and springs are arranged between the sliding shafts and the sliding groove 151; an arc-shaped rod one 152 is sleeved on the sliding shaft close to the measuring instrument 2, an arc-shaped rod two 153 is sleeved on the sliding shaft far from the measuring instrument 2, and the mutually approaching ends of the arc-shaped rod one 152 and the arc-shaped rod two 153 are hinged through a rotating shaft 154. Sleeve plates 155 are arranged at both ends of the rotating shaft 154, and cleaning parts 156 are arranged on the outer walls of the sleeve plates 155.

[0052] The specific working process is as follows:

[0053] When in use, first, the staff opens the hatch on the machine body 1, and then places the gas turbine stator blade on the clamping tooling 11. The clamping work in this application is a fixture in the prior art, which can be a three-jaw chuck, and is not specifically limited. The gas turbine stator blade is clamped on the clamping tooling 11. Then, the staff controls the machine body 1 through the control panel on the machine body 1. The working control panel controls the controller inside the machine body 1 to control the operation of the machine body 1;

[0054] During the detection of the gas turbine stator blade, in the initial state, the output end of the first telescopic device 13 is located in the lower part of the inner cavity of the machine body 1, so that the second telescopic device 14 and the connecting blocks 141 are located outside the clamping work; and by controlling the rotation of the arc-shaped plate 142. In the initial state, the arc-shaped plate 142 is in a vertical state, and the middle part is curved upwards in an arc. The power source for the rotation of the arc-shaped plate 142 comes from the driving device arranged on one side of the connecting block 141, and the driving device can be a motor; so that the arc-shaped plate 142 is rotated by 90°. The middle part of the arc-shaped plate 142 is curved in an arc towards the end away from the clamping work; then the gas turbine stator blade is installed on the clamping tooling 11;

[0055] Subsequently, the driving motor 121 rotates. The driving motor 121 drives the driving plate 12 to rotate. The driving plate 12 drives the first telescopic device 13 at both ends to rotate. The first telescopic device 13 drives the two second telescopic devices 14 to rotate. The second telescopic device 14 drives the arc-shaped plate 142 to rotate through the connecting block 141, causing the arc-shaped plate 142 to rotate on the outer circumference of the clamping tooling 11. During this process, the measuring instrument 2 on the arc-shaped plate 142 performs positioning detection on the static blades of the gas turbine and the film holes above them.

[0056] During the rotation of the driving motor 121, the two telescopic devices slowly contract upward synchronously, causing the arc-shaped plate 142 to move upward at a constant speed during rotation. As a result, during the rotation of the measuring instrument 2 on the outer circle of the static blades of the gas turbine, it moves upward from the lower side to the upper side of the gas turbine at a constant speed, achieving a comprehensive scanning detection of the static blades of the gas turbine and the film holes above them, and transmitting the detection data to the display panel on the body 1, enabling the staff to obtain accurate specific data.

[0057] Moreover, during the detection of the static blades of the gas turbine, due to the different curvatures of the surface of the gas turbine, in order to obtain accurate data during the detection of the static blades of the gas turbine, the staff can control the second telescopic device 14 to extend and contract at the lower end of the first telescopic device 13. When the second telescopic device 14 extends, the two second telescopic devices 14 push the connecting blocks 141, and the two connecting blocks 141 approach each other, causing the two connecting blocks 141 to squeeze the arc-shaped plate 142. Since the arc-shaped plate 142 is made of an elastic material, specifically an elastic steel plate, when the arc-shaped plate 142 is squeezed by the connecting blocks 141 at both ends, the bending degree of the arc-shaped plate 142 increases. Conversely, when the two second telescopic devices 14 contract, the two connecting blocks 141 move away from each other, causing the two connecting blocks 141 to pull the two ends of the arc-shaped plate 142, and the bending arc of the arc-shaped plate 142 decreases. Thus, by controlling the bending arc of the arc-shaped plate 142, the measuring instrument 2 on the arc-shaped plate 142 can be made to be applicable to static blades of different sizes of gas turbines to a certain extent. During this process, a through groove 15 is opened on the arc-shaped plate 142 to reduce the bending resistance of the arc-shaped plate 142.

[0058] And the measuring instrument 2 is slidably connected inside the through groove 15, and the sliding connection mode between the measuring instrument 2 and the through groove 15 is a slide rail 157 slider mechanism in the prior art. And in the initial state, the measuring instrument 2 is located in the middle of the through groove 15. And a chute 151 is opened on the inner wall of the through groove 15, and two sliding shafts are arranged inside the chute 151. And according to the distance between the sliding shafts and the measuring instrument 2, an arc-shaped rod one 152 and an arc-shaped rod two 153 are arranged above them. The arc-shaped rod one 152 is closer to the measuring instrument 2. And the arc-shaped rod two 153 and the arc-shaped rod one 152 are hinged at the mutually close ends through a rotating shaft 154. And sleeve plates 155 are arranged at both ends of the rotating shaft 154, and a cleaning member 156 is arranged on the outer ring of the sleeve plate 155. The cleaning member 156 can be an electrostatic brush.

[0059] During the process that the arc-shaped plate 142 rotates upward to detect the stationary blades of the gas turbine, the staff moves the measuring instrument 2 towards the arc-shaped rod one 152, so that the measuring instrument 2 will first extrude the arc-shaped rod one 152. The arc-shaped rod one 152 receives the push of the measuring instrument 2, and the arc-shaped rod one 152 drives the sliding shaft close to the measuring instrument one to move towards the arc-shaped rod two 153. During the process, the gap between the arc-shaped rod one 152 and the arc-shaped rod two 153 gradually becomes smaller. Furthermore, the hinge joint between the arc-shaped rod one 152 and the arc-shaped rod two 153 approaches the position of the stationary blade of the gas turbine. During the process, the sleeve plate 155 approaches the position of the stationary blade of the gas turbine. Until the cleaning member 156 on the outer side of the sleeve plate 155 contacts the outer side of the stationary blade of the gas turbine.

[0060] Subsequently, the driving motor 121 controls the arc-shaped plate 142 to rotate clockwise. During the process, the cleaning member 156 will first clean the surface of the stationary blade of the gas turbine, and then the measuring instrument 2 detects along the cleaning track of the cleaning member 156. And during this process, the cleaning member 156 can clean the air film holes on the surface of the stationary blade of the gas turbine, and the bristles on the cleaning member 156 can be embedded into the air film holes during the contact process, so as to clean the air film holes and avoid the problem of reduced detection accuracy caused by the blockage of the air film holes. Furthermore, the detection and positioning accuracy of the air film holes on the stationary blade of the gas turbine is improved. When the detection is completed, the measuring instrument 2 resets, and the springs in the chute 151 make the arc-shaped rod one 152 and the arc-shaped rod two 153 reset.

[0061] Embodiment 2:

[0062] As Figures 3 to 11 shown; a slide rail 157 is arranged at the lower end of the connecting block 141, the lower end of the connecting block 141 is slidably connected to the slide rail 157, and the telescopic end of the telescopic device two 14 is connected to the slide rail 157.

[0063] A moving block 16 is slidably connected inside the through groove 15, and the measuring instrument 2 is arranged on the moving block 16.

[0064] Inside the moving block 16, there is a micro motor, and a driving wheel 161 is arranged on the micro motor; at the outer end of the moving block 16, there is a driving ring 162. The inner ring of the driving ring 162 is slidably connected to both ends of the moving block 16, and the arc-shaped plate 142 is simultaneously located in the inner ring of the driving ring 162. A driving groove 163 is opened in the middle of the inner ring of the driving ring 162, the driving wheel 161 is located inside the driving groove 163, and the measuring instrument 2 is arranged on the outer wall of the driving ring 162;

[0065] Rollers 164 are arranged at the upper and lower ends of the moving block 16, and the rollers 164 between the upper and lower ends of the moving block 16 are in contact with the inner wall of the driving ring 162.

[0066] The specific working process is as follows:

[0067] On the basis of the above-mentioned embodiment, a slide rail 157 is arranged at the lower end of the connecting block 141, and the lower end of the connecting block 141 is slidably connected to the slide rail 157, so that the telescopic end of the telescopic device two 14 is connected to the slide rail 157;

[0068] Since the shape of the static blade of a gas turbine is mostly an arc-shaped structure, that is, one side is an arc-shaped protrusion, then the opposite side of the arc-shaped protrusion is an arc-shaped depression; when detecting the static blade of a gas turbine, the distance between the measuring instrument 2 and the surface of the arc-shaped protrusion is different from the distance between the surface of the arc-shaped depression, resulting in some deviation in the detection result;

[0069] When the staff is detecting the static blade of a gas turbine with an arc-shaped structure, first, the bending direction of the arc-shaped plate 142 is towards the end far from the clamping tooling 11, so that the measuring instrument 2 on the arc-shaped plate 142 detects the convex surface of the static blade of the gas turbine. During the process, the concave surface of the arc-shaped plate 142 corresponds to the convex surface of the static blade of the gas turbine. The detection method is as follows: the driving motor 121 drives the driving plate 12 to swing and rise reciprocally, so that the measuring instrument 2 on the arc-shaped plate 142 rises in a uniform Z-shaped trajectory to detect the convex surface of the static blade of the gas turbine until the measuring instrument 2 and the arc-shaped plate 142 move to the upper end of the static blade of the gas turbine; then the telescopic device one 13 continuously contracts, and the horizontal height of the arc-shaped plate 142 and the measuring instrument 2 is higher than the upper end of the static blade of the gas turbine; after that, the staff controls the connecting block 141 to slide on the slide rail 157, and the connection mode between the connecting block 141 and the slide rail 157 is an electric slide rail 157 slider in the prior art;

[0070] And at the same time, a moving block 16 is arranged inside the through groove 15, and a driving ring 162 is arranged on the moving block 16. The inner ring of the driving ring 162 is in contact with the upper and lower ends of the moving block 16, and a micro motor is arranged inside the moving block 16, so that the micro motor drives the driving wheel 161. A driving groove 163 is opened in the inner ring of the driving ring 162, and the driving wheel 161 is located inside the driving groove 163;

[0071] In the above description, when the horizontal heights of the arc-shaped plate 142 and the measuring instrument 2 are higher than the upper end of the gas turbine stator blade, the staff controls the sliding block 141 to slide on the slide rail 157, so that the sliding block 141 slides towards the concave surface direction of the gas turbine stator blade. After the sliding ends, the first telescopic device 13 extends downward, and the arc-shaped plate 142, the sliding block 141 and the measuring instrument 2 move downward. At this time, the convex surface of the arc-shaped plate 142 corresponds to the concave surface of the gas turbine stator blade; subsequently, the micro motor controls the driving wheel 161 to rotate, and the driving wheel 161 meshes with the inner wall of the driving groove 163 inside the driving ring 162. The meshing mode between the driving wheel 161 and the inner wall of the driving groove 163 can be gear and tooth block meshing; when the driving wheel 161 rotates, it drives the driving ring 162, and the inner side of the driving ring 162 rotates at both ends of the moving block 16; so that the driving ring 162 rotates 180°, and the measuring instrument 2 faces the concave surface of the gas turbine stator blade. Subsequently, the first extending device extends downward at a constant speed, and the driving motor 121 rotates reciprocally, so that the measuring instrument 2 descends at a constant speed in a Z shape; until it moves to the lower end of the gas turbine stator blade, it can accurately detect the convex and concave surfaces of the gas turbine, thereby improving the detection accuracy; and by arranging rollers 164 at the upper and lower ends of the moving block 16, the rollers 164 contact the inner ring of the driving ring 162, so that when the driving ring 162 slides at both ends of the moving block 16, the rollers 164 rotate, reducing the friction between the driving ring 162 and the moving block 16.

[0072] Embodiment 3:

[0073] As Figure 12 described; a method for measuring and positioning the air film holes of a gas turbine stator blade, which is applicable to the above-mentioned measuring and positioning tooling for the air film holes of a gas turbine stator blade. The method includes the following steps;

[0074] S1: First, the staff opens the hatch on the machine body 1, so that the arc-shaped plate 142 rotates 90°. The middle part of the arc-shaped plate 142 is arc-shaped and curved towards the end away from the clamping work; then the gas turbine stator blade is installed on the clamping tooling 11; subsequently, the driving motor 121 rotates, and the driving motor 121 drives the driving plate 12 to rotate;

[0075] S2: During the process of the driving motor 121 driving the driving plate 12 to rotate, the driving plate 12 drives the first telescopic device 13 and the second telescopic device 14 at both ends to rotate. The second telescopic device 14 drives the arc-shaped plate 142 to rotate through the connecting block 141; so that the arc-shaped plate 142 rotates on the outer circumference of the clamping tooling 11. During the process, the measuring instrument 2 on the arc-shaped plate 142 performs positioning detection on the gas turbine stator blade and the air film holes above it;

[0076] S3: During the rotation of the drive motor 121, the two telescopic devices contract upward synchronously, so that during the rotation of the arc-shaped plate 142, it moves upward from the lower side of the gas turbine stator blade at a uniform speed, realizing a comprehensive scanning detection of the gas turbine stator blade and the air film holes above it, and transmitting the detection data to the display panel on the body 1; enabling the staff to obtain accurate specific data.

[0077] The above has shown and described the basic principles, main features and advantages of the present invention; those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A measuring and positioning tooling for the air film holes of the stationary blades of a gas turbine. The positioning tooling includes a measuring platform, and is characterized in that, The measurement platform includes: a body, a clamping tooling, which is arranged inside the body and used for clamping workpieces; a driving plate, which is arranged inside the body, and the middle part of its upper end is connected to a driving motor arranged at the upper end of the body; two first telescopic devices, which are arranged on the lower sides of both ends of the driving plate and are located outside the clamping tooling; a second telescopic device, which is arranged at one end close to the clamping tooling under each first telescopic device; two connecting blocks, and each connecting block is arranged at the output end of the second telescopic device; an arc-shaped plate, the two ends of which are respectively rotatably connected to the two connecting blocks, and the middle part of the arc-shaped plate protrudes towards the end far from the clamping tooling; a measuring instrument is slidably connected to the arc-shaped plate; a through groove is opened in the middle of the arc-shaped plate, and in the initial state, the measuring instrument is located in the middle of the through groove; the arc-shaped plate is made of elastic material and is an elastic steel plate; Sliding grooves are opened on the inner wall of the through groove, and two sliding shafts are slidably connected to both ends inside the sliding grooves, and springs are arranged between the sliding shafts and the sliding grooves; an arc-shaped rod one is sleeved on the sliding shaft close to the measuring instrument, and an arc-shaped rod two is sleeved on the sliding shaft far from the measuring instrument. The ends of the arc-shaped rod one and the arc-shaped rod two close to each other are hinged through a rotating shaft, and sleeve plates are arranged at both ends of the rotating shaft, and cleaning parts are arranged on the outer walls of the sleeve plates.

2. The measuring and positioning tooling for the gas film holes of the stationary blades of a gas turbine according to claim 1, characterized in that: A slide rail is arranged at the lower end of the connecting block, and the lower end of the connecting block is slidably connected to the slide rail, and the telescopic end of the second telescopic device is connected to the slide rail.

3. The measuring and positioning tooling for the gas turbine stator blade film holes according to claim 2, wherein: A moving block is slidably connected inside the through groove, and the measuring instrument is arranged on the moving block.

4. A measuring and positioning tooling for the air film holes of the stationary blades of a gas turbine according to claim 3, characterized in that: A micro motor is arranged inside the moving block, and a driving wheel is arranged on the micro motor; a driving ring is arranged at the outer end of the moving block, the inner ring of the driving ring is slidably connected to both ends of the moving block, and the arc-shaped plate is simultaneously located in the inner ring of the driving ring. A driving groove is opened in the middle of the inner ring of the driving ring, the driving wheel is located inside the driving groove, and the measuring instrument is arranged on the outer wall of the driving ring.

5. The measuring and positioning tooling for the gas film holes of the stationary blades of a gas turbine according to claim 4, characterized in that: Rollers are arranged at the upper and lower ends of the moving block, and the rollers between the upper and lower ends of the moving block are in contact with the inner wall of the driving ring.

6. A method for measuring and positioning the air film holes of a gas turbine stator blade, which uses a measuring and positioning tooling for the air film holes of a gas turbine stator blade according to any one of the above claims 1-5, characterized in that: The method includes the following steps; S1: First, the staff opens the hatch on the body, controls the arc-shaped plate to rotate 90°, and the middle part of the arc-shaped plate is arc-shaped and bent towards the end far from the clamping work; then the gas turbine stator vane is installed on the clamping tooling; then the driving motor rotates, and the driving motor drives the driving plate to rotate; S2: During the process of the driving motor driving the driving plate to rotate, the driving plate drives the first telescopic devices and the second telescopic devices at both ends to rotate, and the second telescopic device drives the arc-shaped plate to rotate through the connecting block; so that the arc-shaped plate rotates circumferentially outside the clamping tooling, and during the process, the measuring instrument on the arc-shaped plate performs positioning detection on the gas turbine stator vane and the film holes above it; S3: During the rotation of the driving motor, the two telescopic devices contract upwards synchronously, so that during the rotation of the arc-shaped plate, it moves uniformly from the lower side to the upper side of the gas turbine stator vane, performs a comprehensive scanning detection on the gas turbine stator vane and the film holes above it, and transmits the detection data to the display panel on the body; so that the staff can obtain accurate specific data.

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