Vane orthopedic repair system

Abstract

The application relates to a static blade orthopedic repair system, relates to the technical field of optics, and comprises a support, a wrench, a hydraulic torsion system, a laser interferometer and an optical collimation system, the static blade is placed on the support, a rotating mechanism of the horizontal rotation of the hydraulic torsion system is provided with two clamping grooves; the wrench is provided with handles on both sides and is slidably inserted into the two clamping grooves; the laser interferometer comprises a laser, a beam splitter and an interference detection system, the beam splitter divides an incident light beam into a measurement light beam and a reference light beam, and both light beams are projected to the blade body; the optical collimation system comprises two hollow straight tubes and is parallel to the pointing directions of the measurement light beam and the reference light beam; the inner wall of the hollow straight tube is a straight circular tube-shaped inner wall with a black frosted structure; optical assembly systems are arranged behind the two hollow straight tubes; the optical assembly systems adjust and interfere with the return light beams transmitted by the two hollow straight tubes. The application realizes high-precision orthopedic treatment of the static blade, improves the orthopedic treatment efficiency of the static blade, and has the effect of accurate orthopedic treatment of the overall angle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical technology, in particular to a vane straightening and repairing system. BACKGROUND

[0002] The vane of an aero-engine is a core rotating component in a turbine machine, and its precise structure and aerodynamic performance directly determine the thrust and efficiency of the engine. These vanes are usually made of high-performance high-temperature alloy materials and have complex spatial curved surface shapes, and can work for a long time in a harsh environment of extremely high temperature, high pressure and high speed rotation. However, during manufacturing, assembly or use, the vane may be deformed slightly due to external force impact, fatigue stress and other factors, and such deformation will destroy its original aerodynamic shape, thereby affecting the performance and safety of the entire engine, so the deformed vane must be accurately straightened and repaired.

[0003] In the prior art, the straightening and repairing of the vane mainly relies on manual operation by an operator. Usually, the operator first performs heat treatment on the vane, then vertically fixes the vane through a special support, and clamps and constrains the vane crown as a reference. Subsequently, the operator clamps the vane root using a wrench and applies a torsional force, utilizes the plasticity of the vane after heat treatment, and gradually straightens the vane blade to the required shape. In this process, the operator repeatedly observes by eye or compares using a simple measuring tool, and continuously adjusts the force direction and intensity of the wrench until the blade shape meets the requirements.

[0004] In the manual straightening and repairing method, the operator cannot accurately control the precision of the straightening and repairing, which is reflected in that the operator manually applies a torsional force to the wrench during the straightening process, and the force intensity and angle direction are completely judged by experience. Due to the subjectivity and instability of manual feeling, it is easy to cause undercorrection or overcorrection, thereby destroying the original aerodynamic curved surface shape of the vane blade. The judgment of the straightening effect depends on the visual observation of the vane blade shape by the operator or the comparison using a simple measuring tool. The detection accuracy deviation not only destroys the cooperation gap between the vane and the adjacent components, affects the stability of the airflow in the engine, but also may cause additional vibration and stress concentration of the vane during high-speed rotation, reduces the overall performance of the engine, and even causes safety hazards, which cannot meet the stringent requirements of the aero-engine for high-precision repair of core components. SUMMARY

[0005] In view of the deficiencies in the prior art, one of the purposes of the present application is to provide a vane straightening and repairing system.

[0006] The vane straightening and repairing system provided by the present application adopts the following technical solution:

[0007] The vane orthopedic repair system comprises a support fixed at the vane crown of a stationary blade and a wrench clamping the vane root of the stationary blade, and the stationary blade is vertically placed on the support;

[0008] Further comprising a hydraulic torsion system, the horizontal rotation mechanism of the hydraulic torsion system is provided with left and right two clamping grooves on both sides of the rotation axis;

[0009] Two handles are arranged on both sides of the wrench, and the two handles are respectively slidably inserted into the two clamping grooves;

[0010] Further comprising a laser interferometer;

[0011] The laser interferometer comprises a laser, a beam splitter and an interference detection system, and the beam splitter divides the incident light beam into a measurement light beam and a reference light beam;

[0012] The measurement light beam and the reference light beam are projected onto the upper and lower ends of the blade body part between the vane crown and the vane root;

[0013] Further comprising an optical collimation system, the optical collimation system comprises two hollow straight tubes parallel to the pointing directions of the measurement light beam and the reference light beam;

[0014] The inner wall of the hollow straight tube adopts a black frosted straight circular tube-shaped inner wall;

[0015] The rear of the two hollow straight tubes is respectively provided with an optical component system for adjusting the angle of light;

[0016] The two optical component systems respectively adjust the return light beams transmitted by the two hollow straight tubes and perform interference;

[0017] First, a qualified standard stationary blade is loaded, the laser interferometer is calibrated, and a standard interference image is obtained;

[0018] Then, a stationary blade to be orthopedic is loaded, the wrench is driven to rotate by the hydraulic torsion system, and then the stationary blade to be orthopedic is twisted for orthopedic, and when the laser interferometer presents an interference image different from the standard interference image and meeting the threshold requirement, it is considered that the orthopedic is completed.

[0019] During the torsional orthopedic, the entire blade body will be deformed as a whole, and the traditional laser interferometer can only focus on the displacement deformation of one point and cannot observe the overall deformation. However, in actual production, the orthopedic of the blade body is concerned with the overall attitude of the blade body. If the traditional laser interferometer is used to detect the orthopedic change of a single position, it is inevitable to interfere with the following deformation of other positions of the blade body.

[0020] The relative synchronous position difference detection on the upper and lower ends of the blade body obtains the overall attitude parameter information of the entire blade body, overcomes the technical problem that the traditional simple laser interferometer cannot detect integrally, and obtains the technical effect of dynamic, integral, anti-interference and accurate detection, thereby facilitating accurate correction of the overall angle.

[0021] By adopting the above technical scheme, the horizontal rotating mechanism of the hydraulic torsion system is provided with clamping grooves on both sides of the rotating axis, and forms a sliding fit structure with the handles on both sides of the wrench, allowing the handles to produce slight sliding in the clamping grooves, which can not only ensure that the rotating mechanism stably transmits the torsion force through the handles, but also automatically release the displacement, realize dynamic centering of the handles and the clamping grooves, avoid damage of stress concentration to the static blade, and ensure that the torsion force uniformly acts on the blade root, thereby improving the stability of the correction process.

[0022] Meanwhile, the static blade correction and repair system introduces a laser interferometer to realize high-precision detection. Compared with the manual observation or simple gauge comparison in the prior art, the laser interferometer is based on the interference principle of light, divides the incident light beam into a measurement light beam and a reference light beam through a beam splitter, and projects the two light beams onto the upper and lower ends of the blade body between the blade crown and the blade root. The laser interferometer can capture the interference image changes corresponding to the small deformation of the blade body in real time, completely eliminate the micron-level profile deviation of the blade body that cannot be identified by the naked eye, and realize micron-level or even sub-micron-level deformation recognition, so as to ensure that the aerodynamic profile of the repaired blade body strictly meets the design requirements, thereby avoiding the internal airflow turbulence of the engine caused by the profile deviation of the blade body and ensuring the engine thrust and efficiency.

[0023] Compared with the traditional laser interferometer, the laser interferometer of the static blade correction and repair system does not rely on a fixed reference mirror. When the laser interferometer and the static blade move relative to each other or change in angle, the optical path difference between the reference light beam and the measurement light beam will change asynchronously, resulting in irregular jumping of the interference imaging and making it impossible to accurately detect the small deformation. In the static blade correction and repair system, the two light beams are synchronously projected onto the static blade. Even if there is a slight positional change between the laser interferometer and the static blade, the optical path difference between the two light beams can still be adjusted synchronously and is almost not affected by such changes. The interference imaging jumping problem is completely solved, the detection accuracy is stabilized at the micron level, and the small deformation of the static blade caused by external impact or fatigue stress can be accurately identified, thereby providing a reliable detection basis for subsequent correction.

[0024] The laser interferometer is matched with an optical collimation system, two hollow straight pipes are respectively provided with two light beams and are directed in parallel, the inner wall of the straight pipe is designed in a straight circular tube shape with a black frosted structure, after the light beams are reflected by the blade body, the hollow straight pipe can absorb stray light with an included angle larger than a channel direction and only allow effective light beams close to parallel to pass through, and then the light angle is adjusted by a rear optical assembly system to ensure that the two reflected light beams accurately converge and form clear interference fringes, further reduce the interference of environmental stray light on the detection accuracy, and enable the interference detection system to accurately capture the changes of the interference fringes corresponding to the deformation of the blade body, thereby providing accurate basis for orthopedic end judgment.

[0025] In addition, the present vane orthopedic repair system designs a process of first loading a standard vane to calibrate the laser interferometer to obtain a standard interference image, and then orthopedic treatment is performed on the vane to be orthopedic, establishes a unified and accurate orthopedic reference, avoids the blindness of traditional manual orthopedic treatment, ensures that each orthopedic treatment is targeted at a qualified standard, and greatly reduces the probability of insufficient or excessive correction.

[0026] Preferably, an inclination sensor is arranged on the support, and the inclination sensor is used to detect the posture of the vane;

[0027] The inclination sensor is electrically connected with a signal prompting system.

[0028] The signal prompting system is configured to send a prompt signal when the inclination sensor detects that the vane is in a vertical posture.

[0029] Through the above technical solution, the inclination sensor arranged on the support cooperates with the signal prompting system to effectively ensure that the initial clamping posture of the vane meets the detection and orthopedic requirements. The vertical posture of the vane is the basis for the accuracy of laser interference detection. If the vane is inclined, the positions of the measurement light beam and the reference light beam projected on the upper and lower ends of the blade body will deviate from the preset detection points, resulting in a deviation in the optical path difference calculation, and further causing distortion of the interference image. The inclination sensor can detect the posture of the vane in real time, and when the vane is in a vertical posture, the signal prompting system sends a prompt in time, so that the operator can quickly confirm the clamping qualification, avoid the deviation of the subsequent orthopedic direction caused by the initial inclined posture, and lay a stable posture reference for high-precision detection and orthopedic treatment.

[0030] Preferably, a three-coordinate detection system is further included, and the three-coordinate detection system includes a three-coordinate measuring instrument, the three-coordinate measuring instrument is arranged on the side of the support through a moving track, and the three-coordinate measuring instrument can move towards or away from the support along the moving track.

[0031] The three-coordinate detection system is configured to first scan the standard vane installed on the support by the three-coordinate measuring instrument before the wrench clamps the blade root of the standard vane to obtain three-dimensional data of the standard vane.

[0032] Secondly, before the wrench clamps the blade root of the static blade to be straightened, the coordinate measuring machine scans the static blade to be straightened installed on the support to obtain three-dimensional data of the static blade to be straightened;

[0033] Then, the three-dimensional data of the static blade to be straightened is compared with the three-dimensional data of the standard static blade to provide a decision basis for the straightening operation of the hydraulic torsion system.

[0034] By adopting the above technical scheme, the coordinate measuring machine is arranged beside the support through the moving track, and can scan the standard static blade and the static blade to be straightened before the wrench clamps the blade root, so as to obtain three-dimensional data of the standard static blade and the static blade to be straightened. By comparing the three-dimensional data of the static blade to be straightened with the three-dimensional data of the standard static blade, the key parameters such as the torsion angle deviation of the blade body, the maximum deviation position of the profile, and the assembly reference size deviation of the blade root can be quantitatively analyzed, so as to provide a straightening decision basis for the hydraulic torsion system. The laser interferometer is used to monitor the interference image of the static blade in the torsion process in real time, so as to form a cooperation relationship between the preliminary static detection of the coordinate detection system and the continuous dynamic detection of the laser interferometer.

[0035] Meanwhile, the moving track allows the coordinate measuring machine to avoid the hydraulic torsion system during straightening, so as to avoid component interference.

[0036] Preferably, the jaw of the wrench is an adjustable structure, which comprises a fixed jaw arm and a movable jaw arm matched with each other.

[0037] The fixed jaw arm is fixedly connected with the wrench main body, and the movable jaw arm is slidably connected with the wrench main body through an electric screw.

[0038] The electric screw drives the movable jaw arm to slide in the direction towards or away from the fixed jaw arm, so as to adjust the opening and closing width of the jaw of the wrench to adapt to the thickness of the blade root of the static blade of different specifications.

[0039] By adopting the above technical scheme, the electric screw drives the movable jaw arm to slide, so as to flexibly adjust the opening and closing width of the jaw of the wrench to adapt to the thickness of the blade root of the static blade of different specifications. Without replacing the special wrench for the static blade of different specifications, the equipment investment cost and the tool replacement time are greatly reduced. Compared with manual adjustment, the electric screw driving is not only more convenient to operate, but also can ensure the opening and closing precision of the jaw, avoid the problem of uneven clamping caused by manual adjustment, and provide protection for stable transmission of the subsequent torsion force.

[0040] Preferably, the inner working surfaces of the fixed jaw arm and the movable jaw arm of the wrench are provided with high-temperature-resistant anti-skid pads.

[0041] By adopting the technical scheme, the high-temperature-resistant anti-skid lining pad arranged on the inner side working surface of the fixed jaw arm and the movable jaw arm solves the problem caused by heat treatment before the static blade is straightened, such as that the surface temperature of the static blade is high after heat treatment, the ordinary lining pad is easy to soften or be damaged, the high-temperature-resistant lining pad can withstand high temperature, and the clamping is always stable. Meanwhile, the texture on the surface of the anti-skid lining pad can increase the friction force with the blade root, avoid the blade root from slipping in the twisting process, ensure that the torque of the hydraulic twisting system is accurately transmitted to the blade root, and prevent the deviation of the straightening angle caused by slipping.

[0042] Preferably, a transparent glass cylinder is arranged on the optical path of the measuring light beam, two ends of the glass cylinder are perpendicular to the direction of the optical path of the measuring light beam, and the inside of the glass cylinder is filled with a gas with a refractive index higher than air and an adjustable pressure, forming an optical path adjustment device.

[0043] By adopting the technical scheme, the transparent glass cylinder arranged on the optical path of the measuring light beam forms an optical path adjustment device, the two ends of the glass cylinder are perpendicular to the direction of the optical path, ensuring that the measuring light beam is vertically incident and emitted, avoiding detection errors caused by refraction deviation of the light beam; the inside of the glass cylinder is filled with a gas with a refractive index higher than air and an adjustable pressure, which can compensate for the interference of environmental factors on the optical path, such as fluctuations in workshop environmental temperature and air pressure, which can change the refractive index of air, and then cause changes in the optical path of the measuring light beam, affecting the precision of the interference image. By adjusting the refractive index of the gas in the glass cylinder by adjusting the pressure, the optical path difference deviation can be corrected in real time, ensuring that the interference detection is not disturbed by the environment.

[0044] Preferably, the glass cylinder is provided with a gas inlet, the gas inlet is connected with a gas pump through a pipeline, one end of the gas pump away from the glass cylinder is connected with a carbon dioxide gas source, and the gas pump fills or extracts carbon dioxide gas into the glass cylinder to adjust the gas pressure in the glass cylinder.

[0045] By adopting the technical scheme, the glass cylinder is connected with the gas pump and the carbon dioxide gas source through the gas inlet. Carbon dioxide is a common, stable and safe industrial gas, and its refractive index at normal temperature and pressure is about 1.00045. The refractive index of air at normal temperature and pressure is 1.00029. The refractive index of carbon dioxide at normal temperature and pressure is higher than that of air. Compared with the traditional mechanical fine-tuning lens method, this design does not need to move any optical components, avoiding the vibration or position deviation caused by mechanical adjustment, and the adjustment process is simpler, more accurate and stable. Secondly, using carbon dioxide as the filling gas in the optical path adjustment device can ensure high-precision adjustment while also having the advantages of low cost, easy access and safety of carbon dioxide gas, making the static blade straightening and repairing system more economical and sustainable in long-term use.

[0046] Preferably, the length of the hollow straight pipe is 50-80mm, and the inner diameter of the hollow straight pipe is 10-15mm.

[0047] Two reflected light rays enter the hollow straight tube, and the light rays with a direction close to parallel pass through the hollow straight tube, and the light rays with a large angle are irradiated to the black frosted structure and are absorbed.

[0048] By adopting the technical scheme, the size of the hollow straight tube in the optical collimation system is an optimal choice considering the stray light filtering effect and the light beam propagation efficiency, and the length of 50-80mm can ensure sufficient absorption of stray light, and too long length will lead to light beam attenuation, and too short length cannot effectively filter stray light with a large angle deviation; the inner diameter of 10-15mm is suitable for the spot size of the measurement light beam and the reference light beam, which can avoid that the light beam edge is blocked due to too small inner diameter, and prevent more stray light from being introduced due to too large inner diameter.

[0049] After the two reflected light rays enter the hollow straight tube, the light rays with a direction close to parallel can smoothly pass through, and the stray light with a large angle is absorbed by the black frosted inner wall, which can significantly reduce the interference of environmental stray light on the subsequent optical components and the interference detection system, ensure that the light beam entering the optical component has high purity, and then improve the clarity and contrast of the interference fringes, so that the interference detection system can more accurately capture the changes of the fringes corresponding to the blade shape deformation, provide more reliable basis for the judgment of the orthopedic end, and finally ensure the high precision and consistency of the static vane orthopedic repair.

[0050] In summary, the present application has at least one of the following beneficial technical effects:

[0051] 1. In the process of torsional orthopedics, the entire blade will deform as a whole, and the traditional laser interferometer can only focus on the displacement deformation of one point and cannot observe the overall deformation. However, in actual production, the overall attitude orthopedics of the entire blade is concerned. If a traditional laser interferometer is used to detect the orthopedic change of a single position, interference will inevitably occur due to the following deformation of other positions of the blade.

[0052] In the present application, the relative synchronous displacement of the upper and lower ends of the blade is detected to obtain the overall attitude parameter information of the entire blade, which overcomes the technical problem of the traditional simple laser interferometer that cannot detect the overall deformation, and achieves the technical effects of dynamic, overall, anti-interference and accurate detection, which is convenient for precise orthopedics of the overall angle.

[0053] 2. The horizontal rotating mechanism of the hydraulic torsional system is provided with clamping grooves on both sides of the rotating axis, and forms a sliding fit structure with the handles on both sides of the wrench, so that the handles can produce slight sliding in the clamping grooves, which can not only ensure that the rotating mechanism stably transmits the torsional force through the handles, but also automatically release the displacement, realize the dynamic centering of the handles and the clamping grooves, avoid the damage of stress concentration to the static vane, and ensure that the torsional force uniformly acts on the blade root, thereby improving the stability of the orthopedic process.

[0054] 3. The static blade shape correction and repair system introduces a laser interferometer to realize high-precision detection. Compared with the existing technology of manual observation by naked eye or simple gauge comparison, the laser interferometer is based on the interference principle of light, divides the incident light beam into a measurement beam and a reference beam through a beam splitter, and projects them onto the upper and lower ends of the blade body between the blade crown and the blade root. It can capture the interference image changes corresponding to the small deformation of the blade body in real time, completely get rid of the micron-level profile deviation of the blade body that cannot be identified by manual naked eye, and ensure that the aerodynamic profile of the repaired blade body strictly meets the design requirements, thereby avoiding the airflow turbulence in the engine caused by the profile deviation of the blade body and ensuring the engine thrust and efficiency.

[0055] Compared with the traditional laser interferometer, the laser interferometer of the static blade shape correction and repair system does not rely on a fixed reference mirror. When the laser interferometer and the static blade move relative to each other or change in angle, the optical path difference between the reference beam and the measurement beam will change asynchronously, resulting in irregular jumps in interference imaging and making it impossible to accurately detect small deformations. In the static blade shape correction and repair system, the two beams are projected synchronously onto the static blade. Even if there is a slight positional change between the laser interferometer and the static blade, the optical path difference of the two beams can still be adjusted synchronously, almost unaffected by such changes, completely solving the problem of interference imaging jumps, and making the detection accuracy stable at the micron level, which can accurately identify the small deformation of the static blade caused by external impact or fatigue stress, and provide reliable detection basis for subsequent shape correction. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 is the overall structure schematic diagram of the static blade shape correction and repair system according to the embodiment of the present application;

[0057] Figure 2 is Figure 1 is the structure schematic diagram of the rotating mechanism and the handle;

[0058] Figure 3 is the schematic diagram of the projection path of the measurement beam and the reference beam.

[0059] Reference signs: 1, static blade; 2, support; 3, wrench; 31, fixed jaw arm; 32, movable jaw arm; 4, rotating mechanism; 5, clamping groove; 6, handle; 7, laser interferometer; 8, measurement beam; 9, reference beam; 10, inclination sensor; 11, three-coordinate measuring instrument; 12, moving track; 13, glass cylinder; 14, air pump. DETAILED DESCRIPTION

[0060] The following will be described in detail in combination with the accompanying Figure 1 - the accompanying Figure 3 The present application will be further described in detail.

[0061] The embodiment of the present application discloses a vane straightening and repairing system.

[0062] With reference to Figure 1 , Figure 2 and Figure 3 , the vane straightening and repairing system comprises a support 2, a wrench 3, a hydraulic torsion system, a laser interferometer 7 and an optical collimation system; the vane 1 is vertically placed on the support 2, the horizontal rotating mechanism 4 of the hydraulic torsion system is provided with two left and right clamping grooves 5 on both sides of the rotating axis, the wrench 3 is provided with two handles 6 on both sides, the two handles 6 are respectively slidably inserted into the two clamping grooves 5, the synchronous torsion of the wrench 3 and the blade root is driven by the rotation of the rotating mechanism 4, the straightening action of the vane 1 is realized, and the displacement of the vane 1 caused by elastic deformation during torsion is released by the sliding of the handle 6, so that local stress concentration is prevented to cause damage to the vane 1; the laser interferometer 7 comprises a laser, a beam splitter and an interference detection system, the beam splitter divides the incident light beam into a measuring light beam 8 and a reference light beam 9, the measuring light beam 8 and the reference light beam 9 are projected onto the upper and lower ends of the blade body between the crown and the blade root, the optical collimation system comprises two hollow straight tubes which are respectively parallel to the pointing directions of the measuring light beam 8 and the reference light beam 9, the inner wall of the hollow straight tube is a straight circular tube-shaped inner wall with a black frosted structure, and the rear of the two hollow straight tubes is respectively provided with an optical assembly system for adjusting the angle of light, which is formed by combining a prism, a mirror and a converging lens. The two optical assembly systems respectively adjust the return light beams transmitted by the two hollow straight tubes and perform interference; when the vane straightening and repairing system works, a qualified standard vane 1 is first loaded, the laser interferometer 7 is calibrated, a standard interference image is obtained, then a vane 1 to be straightened is loaded, the wrench 3 is driven to rotate by the hydraulic torsion system, and then the vane 1 to be straightened is twisted to be straightened, and the straightening is considered to be completed when the laser interferometer 7 presents an interference image which is different from the standard interference image and meets the threshold requirement.

[0063] Specifically, the support 2 is used for fixing the crown of the vane 1, in order to ensure that the vane 1 can be stably fixed when the vane 1 is twisted, the top of the support 2 is provided with a positioning groove matched with the crown of the vane 1, the vane 1 is vertically placed on the support 2, the crown is embedded into the positioning groove to realize preliminary positioning, and an inclination sensor 10 is arranged on the support 2 to detect the posture of the vane 1, so as to ensure the vertical posture of the vane 1. Further, the vane straightening and repairing system further comprises a signal prompting system, the inclination sensor 10 is electrically connected with the signal prompting system through a wire, and when the inclination sensor 10 detects that the vane 1 is in the vertical posture, the signal prompting system sends a prompt signal, so as to facilitate the operator to confirm whether the clamping posture of the vane 1 is qualified.

[0064] The wrench 3 is used to clamp the blade root of the stationary blade 1, and the jaw thereof is designed as an adjustable structure. The adjustable wrench 3 comprises a fixed jaw arm 31 and a movable jaw arm 32 which are matched with each other, wherein the fixed jaw arm 31 is fixedly connected with the wrench 3 body; the movable jaw arm 32 is provided with a guide sliding block at the bottom, and the wrench 3 body is provided with a guide groove matched with the guide sliding block, the guide sliding block is embedded in the guide groove of the wrench 3 body, and the movable jaw arm 32 is slidably connected with the wrench 3 body through an electric screw rod. When the blade crown of the stationary blade 1 is fixed on the support 2, and the blade root of the stationary blade 1 needs to be clamped, the screw rod of the electric screw rod is rotated to drive the guide sliding block of the movable jaw arm 32 to move towards or away from the fixed jaw arm 31, thereby adjusting the opening and closing width of the jaw of the wrench 3, and clamping the blade root of the stationary blade 1 of different specifications. Further, in order to avoid damage to the blade root when the wrench 3 is clamped and to enhance the anti-skid effect, high-temperature-resistant anti-skid pads are arranged on the inner working surfaces of the fixed jaw arm 31 and the movable jaw arm 32. The high-temperature-resistant anti-skid pads can withstand the stationary blade 1 after heat treatment, and can also increase the friction force with the blade root to prevent the blade root of the stationary blade 1 from slipping during the twisting process.

[0065] The hydraulic torsion system is used to drive the wrench 3 to twist the blade root of the stationary blade 1, and the core thereof is a horizontal rotating mechanism 4. Two left and right clamping grooves 5 are symmetrically arranged on both sides of the rotating axis of the rotating mechanism 4. Correspondingly, two cylindrical handles 6 are integrally formed on both sides of the wrench 3, and the two handles 6 are respectively slidably inserted into the left and right clamping grooves 5 of the rotating mechanism 4, and there is a matching gap between the handle 6 and the clamping groove 5. The matching gap not only ensures that the handle 6 can rotate synchronously with the rotating mechanism 4 to transmit the torsion force, but also allows the handle 6 to produce a slight sliding in the clamping groove 5 to release the displacement of the stationary blade 1 due to elastic deformation when twisting, and automatically adjusts the rotating axis to avoid local stress concentration and damage to the blade root.

[0066] The laser interferometer 7 is used to detect the deformation of the vane body of the stationary vane 1 after the vane root and the vane crown of the stationary vane 1 are clamped and fixed. The laser interferometer 7 includes a laser, a beam splitter and an interference detection system. An operator can adjust the inclination angle of the beam splitter so that the incident light beam can be uniformly divided into the measurement light beam 8 and the reference light beam 9 after passing through the beam splitter, and the two light beams are projected to the upper and lower ends of the vane body between the vane crown and the vane root. The conventional laser interferometer 7 is a high-precision measuring instrument based on the principle of laser interference, and usually includes a fixed reference mirror. During the scanning process between the laser interferometer 7 and the object to be detected, the conventional laser interferometer 7 inevitably produces relative displacement or relative angle change at least on the micron level, and irregular jumps of interference imaging occur, so that the change of the object to be detected cannot be accurately detected. However, in the present application, the measurement light beam 8 and the reference light beam 9 are directly projected to the stationary vane 1. Although relative displacement or relative angle change still occurs, the optical path difference between the measurement light beam 8 and the reference light beam 9 changes synchronously, and is almost not affected by the slight change of the position between the laser interferometer 7 and the stationary vane 1, so that the problem of irregular jumps of interference imaging does not occur during the projection process of the measurement light beam 8 and the reference light beam 9. The optical collimation system is used to optimize the propagation path of the measurement light beam 8 and the reference light beam 9, and reduce the interference of environmental stray light. The optical collimation system includes two hollow straight pipes. The length of the hollow straight pipe is set to 50-80 mm, and the inner diameter is 10-15 mm. In the present embodiment, the length of the hollow straight pipe is set to 50 mm, and the inner diameter is 15 mm. The inner wall of the hollow straight pipe is treated by sand blasting to form a black frosted structure. The structure can absorb stray light with an included angle greater than 5 degrees with the pointing direction of the hollow straight pipe. An optical assembly system for adjusting the angle of light is arranged at the rear of the two hollow straight pipes. The optical assembly system is used to adjust the angle of the reflected light beam. The two reflected light beams are adjusted by the optical assembly, and then intersect at the detector of the interference detection system to form interference fringes. At the same time, under the absorption of stray light by the black frosted structure, the clarity of the interference fringes can be improved, so that the interference detection system can capture and analyze.

[0067] A transparent glass cylinder 13 is arranged on the light path of the measurement light beam 8. The glass cylinder 13 is a sealed structure, the two ends of the glass cylinder 13 are perpendicular to the direction of the light path of the measurement light beam 8, so as to ensure that the measurement light beam 8 can be vertically incident and emitted, and the inside of the glass cylinder 13 is filled with a gas with a higher refractive index than air and an adjustable pressure, forming an optical path adjustment device. The optical path adjustment device improves the detection accuracy of the laser interferometer 7, and reduces the influence of environmental temperature and pressure changes on the optical path of the measurement light beam 8. Further, a gas inlet is formed on the side wall of the glass cylinder 13. The gas inlet is connected with a gas pump 14 through a pipeline. The gas pump 14 is connected with a carbon dioxide source away from the glass cylinder 13. The gas pump 14 can fill or extract carbon dioxide gas into or out of the glass cylinder 13. By adjusting the gas pressure in the glass cylinder 13, the optical path of the measurement light beam 8 passing through the glass cylinder 13 is finely adjusted, the optical path difference offset caused by environmental interference is compensated, and the interference detection is ensured to be accurate.

[0068] In addition, in order to realize quantitative detection of the three-dimensional size of the vane 1 before straightening, and to provide a straightening decision basis for the hydraulic torsion system, the vane straightening and repairing system further comprises a three-coordinate detection system, which comprises a three-coordinate measuring instrument 11. The three-coordinate measuring instrument 11 is arranged beside the support 2 through a high-precision moving guide rail, so as to ensure that the three-coordinate measuring instrument 11 can cover the straightening area of the vane 1, and the moving guide rail can avoid the three-coordinate measuring instrument 11 from the hydraulic torsion system when the hydraulic torsion system straightens the vane 1. The three-coordinate detection system is configured to: firstly, before the wrench 3 clamps the root of the standard vane 1, the three-coordinate measuring instrument 11 scans the standard vane 1 installed on the support 2 to obtain the three-dimensional data of the standard vane 1; secondly, before the wrench 3 clamps the root of the vane 1 to be straightened, the three-coordinate measuring instrument 11 scans the vane 1 to be straightened installed on the support 2 to obtain the three-dimensional data of the vane 1 to be straightened; and then the three-dimensional data of the vane 1 to be straightened is compared with the three-dimensional data of the standard vane 1 to provide a decision basis for the straightening operation of the hydraulic torsion system.

[0069] The implementation principle of the embodiment of the present application is:

[0070] In the process of torsional straightening, the entire blade body will be deformed as a whole. The traditional laser interferometer can only focus on the displacement deformation of one point and cannot observe the overall deformation. However, in actual production, the blade straightening is concerned about the overall attitude of the entire blade body. If the traditional laser interferometer is used to detect the straightening change of a single position, it will inevitably be disturbed by the following deformation of other positions of the blade body.

[0071] In the present patent application, the relative synchronous displacement detection of the upper and lower ends of the blade body is adopted to obtain the overall attitude parameter information of the entire blade body, which overcomes the technical problem of the traditional simple laser interferometer that cannot detect the overall deformation, and obtains the technical effect of dynamic, overall, anti-interference and accurate detection, which is convenient for accurate straightening of the overall angle.

[0072] When the vane blade orthopedic repair system is working, the qualified standard vane blade 1 is first vertically placed in the positioning groove on the top of the support 2, and the shroud is embedded in the positioning groove to achieve preliminary fixation. The inclination sensor 10 on the support 2 detects the posture of the vane blade 1 in real time. When the vane blade 1 is detected to be in a vertical posture, the signal prompting system sends a prompt signal. After the operator confirms that the clamping is qualified, the three-coordinate measuring instrument 11 moves along the moving guide rail towards the support 2. Before the wrench 3 contacts the standard vane blade 1, the standard vane blade 1 is scanned in all dimensions to obtain the three-dimensional data of the shroud positioning reference, the aerodynamic profile of the blade body and the matching size of the blade root, and the three-dimensional data is stored. After the scanning is completed, the three-coordinate measuring instrument 11 is moved away from the support 2. Then the laser interferometer 7 is started, the inclination angle of the beam splitter is adjusted, the incident light beam is uniformly divided into the measurement light beam 8 and the reference light beam 9 by the beam splitter, and the two light beams are respectively projected onto the upper and lower ends of the blade body between the shroud and the blade root of the standard vane blade 1. The light beams reflected by the blade body enter the corresponding hollow straight pipes of the optical collimation system, and then the optical assembly system behind the hollow straight pipes adjusts the light beam angle. Finally, the two reflected light beams converge at the detector of the interference detection system to form a stable interference fringe, which is used as a standard interference image, so that the laser interferometer 7 is calibrated.

[0073] Then the standard vane blade 1 is removed, and the vane blade to be orthopedic is vertically clamped in the positioning groove of the support 2 in the same way. After the inclination sensor 10 and the signal prompting system confirm the vertical posture of the vane blade to be orthopedic, the three-coordinate measuring instrument 11 is moved to the scanning position again. Before the wrench 3 clamps the blade root of the vane blade to be orthopedic, the vane blade to be orthopedic is scanned in three dimensions to obtain the three-dimensional data of the vane blade to be orthopedic, and the three-dimensional data of the vane blade to be orthopedic is compared with the stored three-dimensional data of the standard vane blade 1. The twist angle deviation and other parameters of the blade body are analyzed to generate a targeted orthopedic decision basis such as the twist direction for the hydraulic twist system. Then, the opening width of the wrench 3 is adjusted to adapt to the thickness of the blade root of the vane blade to be orthopedic, and the blade root is clamped. Then, the hydraulic twist system performs preliminary twisting according to the targeted orthopedic decision such as the twist direction provided by the three-coordinate measuring instrument 11. The rotation shaft of the horizontal rotation mechanism 4 of the hydraulic twist system drives the two side clamping grooves 5 to rotate synchronously. The handle 6 of the wrench 3 which can be slidably inserted into the clamping groove 5 rotates with the clamping groove 5, thereby twisting the blade root. The gap between the handle 6 and the clamping groove 5 allows the handle 6 to slide slightly, thereby releasing the displacement of the vane blade 1 caused by elastic deformation during twisting. The laser interferometer 7 continuously works during the orthopedic process, and the measurement light beam 8 and the reference light beam 9 capture the deformation of the blade body of the vane blade to be orthopedic in real time. If the change of environmental temperature and air pressure causes optical path deviation, the gas pump 14 fills or extracts carbon dioxide gas into or out of the sealed glass cylinder 13 in the light path of the measurement light beam 8, adjusts the gas pressure in the glass cylinder 13 to change the refractive index of carbon dioxide, fine adjusts the optical path of the measurement light beam 8 to compensate for the deviation, and ensures that the interference image generated by the interference detection system in real time accurately reflects the deformation of the blade body. At the same time, the precise orthopedic of the vane blade by the hydraulic twist system is controlled.

[0074] When the real-time interference image presented by the laser interferometer 7 differs from the standard interference image by a difference meeting the design threshold requirement, the hydraulic torsion system stops running, the orthopedic treatment is considered to be completed, and the entire static blade 1 orthopedic repair process is completed.

[0075] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made in the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A vane orthopedic repair system comprising a support (2) for fixing a vane (1) at the crown and a wrench (3) for clamping the vane (1) at the root, characterized in that, The stationary blade (1) is vertically placed on the support (2); Further comprising a hydraulic torsion system, the horizontal rotating mechanism (4) of the hydraulic torsion system is provided with left and right two clamping grooves (5) on both sides of the rotating axis; The wrench (3) is provided with two handles (6) on both sides, and the two handles (6) are respectively slidably inserted into the two clamping grooves (5); Further comprising a laser interferometer (7); The laser interferometer (7) comprises a laser, a beam splitter and an interference detection system, the beam splitter divides the incident light beam into a measurement beam (8) and a reference beam (9); The measurement beam (8) and the reference beam (9) are projected onto the upper and lower ends of the blade body part between the blade crown and the blade root; Further comprising an optical collimation system, the optical collimation system comprises two hollow straight tubes, which are respectively parallel to the pointing direction of the measurement beam (8) and the reference beam (9); The inner wall of the hollow straight tube adopts a black frosted straight circular tube-shaped inner wall; The rear of the two hollow straight tubes is respectively provided with an optical component system for adjusting the angle of light; The two optical component systems respectively adjust the returned light beams transmitted by the two hollow straight tubes and perform interference; First, a qualified standard stationary blade (1) is loaded, the laser interferometer (7) is calibrated, and a standard interference image is obtained; Then, a stationary blade (1) to be corrected is loaded, the wrench (3) is driven to rotate by the hydraulic torsion system, and then the stationary blade (1) to be corrected is twisted for correction. When the laser interferometer (7) presents an interference image that is different from the standard interference image and meets the threshold requirement, it is considered that the correction is completed.

2. The vane orthopedic repair system of claim 1, wherein, The support (2) is provided with an inclination sensor (10), and the inclination sensor (10) is used for detecting the posture of the stationary blade (1); Further comprising a signal prompting system, the inclination sensor (10) is electrically connected with the signal prompting system; The signal prompting system is configured to send a prompt signal when the inclination sensor (10) detects that the stationary blade (1) is in a vertical posture.

3. The vane orthopedic repair system of claim 1, wherein, Further comprising a three-coordinate detection system, the three-coordinate detection system comprises a three-coordinate measuring instrument (11), the three-coordinate measuring instrument (11) is arranged beside the support (2) through a moving track (12), and the three-coordinate measuring instrument (11) can move along the moving track (12) towards or away from the support (2); The three-coordinate detection system is configured to first scan the standard stationary blade (1) installed on the support (2) by the three-coordinate measuring instrument (11) before the wrench (3) clamps the blade root of the standard stationary blade (1), so as to obtain three-dimensional data of the standard stationary blade (1); Secondly, the three-coordinate measuring instrument (11) scans the stationary blade (1) to be corrected installed on the support (2) before the wrench (3) clamps the blade root of the stationary blade (1) to be corrected, so as to obtain three-dimensional data of the stationary blade (1) to be corrected; Then, the three-dimensional data of the stationary blade (1) to be corrected is compared with the three-dimensional data of the standard stationary blade (1), so as to provide a decision basis for the correction operation of the hydraulic torsion system.

4. The vane orthopedic repair system of claim 1, wherein, The jaw of the wrench (3) is an adjustable structure, which comprises a fixed jaw arm (31) and a movable jaw arm (32) matched with each other; The fixed jaw arm (31) is fixedly connected with the wrench (3) body, and the movable jaw arm (32) is slidably connected with the wrench (3) body through an electric screw rod; The electric screw rod drives the movable jaw arm (32) to slide in the direction towards or away from the fixed jaw arm (31), so as to adjust the opening and closing width of the wrench (3) and adapt to the thickness of the blade root of the different specifications of the stationary blade (1).

5. The vane orthopedic repair system of claim 4, wherein, The inner working surfaces of the fixed jaw arm (31) and the movable jaw arm (32) of the wrench (3) are provided with high-temperature-resistant and anti-skid pads.

6. The vane orthopedic repair system of claim 1, wherein, A transparent glass cylinder (13) is arranged on the light path of the measuring light beam (8), the two ends of the glass cylinder (13) are perpendicular to the light path direction of the measuring light beam (8), and the inside of the glass cylinder (13) is filled with a gas with a refractive index higher than air and an adjustable pressure, forming an optical path adjusting device.

7. The vane orthopedic repair system of claim 6, wherein, An air inlet is arranged on the glass cylinder (13), the air inlet is connected with a gas pump (14) through a pipeline, one end of the gas pump (14) away from the glass cylinder (13) is connected with a carbon dioxide gas source, and the gas pump (14) fills or extracts carbon dioxide gas into the glass cylinder (13), so as to adjust the gas pressure in the glass cylinder (13).

8. The vane orthopedic repair system of claim 1, wherein, The length of the hollow straight pipe is 50-80 mm, and the inner diameter of the hollow straight pipe is 10-15 mm; Two reflected light beams enter the hollow straight pipe, and the light beams with an angle close to parallel to the direction of the hollow straight pipe pass through the hollow straight pipe, and the light beams with an angle too large are absorbed by the black frosted structure.

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