Method for controlling the measurement data of the exhaust area of ​​the guide vane

Abstract

The present application relates to the technical field of application of exhaust area measurement data of turbine guide vanes of aircraft engines, and specifically discloses a method for controlling exhaust area measurement data of guide vanes, including obtaining a first upper and lower limit interval for exhaust area control of a single guide vane and a second upper and lower limit interval for exhaust area control of the entire engine; measuring the profile of the guide vane of the engine currently being repaired, and correcting the guide vane with unqualified profile; restoring the coating of the guide vane of the engine currently being repaired, and controlling the thickness of the restored coating to meet the exhaust area of ​​the single guide vane within the first upper and lower limit interval; measuring the exhaust area of ​​the single guide vane to obtain the single exhaust area measurement value; and selecting guide vane spare parts by matching the single exhaust area measurement value. A method for controlling current exhaust area measurement data under existing measurement technology conditions is provided, which reduces the number of engine troubleshooting times caused by guide vane problems.

Description

Technical Field

[0001] The present application relates to the technical field of application of measurement data of exhaust area of ​​turbine guide vanes of aircraft engines, and in particular to a method for controlling measurement data of exhaust area of ​​guide vanes. Background Art

[0002] The exhaust area of ​​the turbine guide vane of an aircraft engine refers to the minimum flow cross-sectional area of ​​the blade cascade, and its size directly affects important parameters such as the temperature before and after the turbine, engine thrust, flow, fuel consumption, etc. By measuring and regulating the exhaust area, the engine can achieve the designed performance indicators. Therefore, the correct use of the exhaust area measurement data can evaluate the theoretical performance of the engine and reduce the waste of repeated test runs.

[0003] At present, a systematic study has been conducted on a certain type of turboprop engine in the study of the relationship between exhaust area and engine performance. However, the current adjustment of exhaust area is mainly based on the situation after the test run. The exhaust area measurement data of the guide vane provided during the production test is different from that during the test run, making it difficult to make direct adjustments. The main reasons include:

[0004] (1) The medium used in the test is air, while the medium used when the turbine guide vane is working is fuel gas, which has different properties from air.

[0005] (2) The wheel guide works under high temperature conditions. Under high temperature conditions, the guide material will undergo thermal expansion, resulting in changes in geometric dimensions.

[0006] (3) During the engine assembly process, there will be assembly errors, which will indirectly affect the exhaust area and cause errors between the actual working value and the measured value.

[0007] (4) The exhaust area data obtained by three-coordinate measurement calculation during the production process cannot accurately reproduce the contour features of the engine turbine guide vane, making it difficult to obtain accurate measurement results.

[0008] Therefore, a method for controlling the current exhaust area measurement data under existing measurement technology conditions is needed to reduce the number of engine troubleshooting times caused by guide problems. Summary of the invention

[0009] The purpose of this application is to provide a method for controlling the exhaust area measurement data of a guide vane, so as to solve the problem in the prior art that there is a lack of a method for controlling the current exhaust area measurement data under the existing measurement technology conditions, so as to reduce the number of engine troubleshooting times caused by guide vane problems.

[0010] To achieve the above-mentioned purpose, an embodiment of the present application provides a method for controlling the exhaust area measurement data of a guide, comprising: obtaining a first upper and lower limit interval for controlling the exhaust area of ​​a single guide, and a second upper and lower limit interval for controlling the exhaust area of ​​the entire guide;

[0011] Use the calibration tool to measure the guide vane profile of the engine being repaired. For the guide vanes with unqualified profiles, use cold calibration or hot calibration to calibrate them.

[0012] Using a spraying device to restore the coating of the guide vane of the engine currently being repaired, and controlling the thickness of the restored coating to ensure that the exhaust area of ​​the single guide vane is within the first upper and lower limit range;

[0013] The exhaust area of ​​the single-piece guide vane after the coating is restored is measured by using a three-coordinate measuring machine to obtain the single-piece exhaust area measurement value;

[0014] By matching the single-piece exhaust area measurement value, the guide spare part is selected so that the entire exhaust area of ​​the engine currently being repaired is within the second upper and lower limit range.

[0015] Optionally, the obtaining of the second upper and lower limit intervals for controlling the exhaust area of ​​the entire platform includes:

[0016] The exhaust area measurement data of a single guide and the exhaust area measurement data of the whole engine are obtained for a plurality of repaired engines, and the second upper and lower limit intervals for the exhaust area control of the whole engine are obtained by adopting the single value range control method.

[0017] Optionally, the single-valued range control method is adopted to obtain the second upper and lower limit intervals for controlling the exhaust area of ​​the entire platform, including:

[0018] Using the formula:

[0019] UCL x = +3σ x ,

[0020] UCL y = +3σ y ,

[0021] LCL x = -3σ x ,

[0022] LCL y = -3σ y ,

[0023] Get the second upper limit UCL of the full exhaust area control of the low guide guidex , the second lower limit LCL x , the second upper limit UCL of the full exhaust area control of the high-conductivity guide y , the second lower limit LCL y , the second upper limit UCL x and the second lower limit LCL x The exhaust area interval between is the second upper and lower limit interval for the full stage exhaust area control of the low guide guide, and the second upper limit UCL y and the second lower limit LCL y The exhaust area interval between is the second upper and lower limit interval for the full exhaust area control of the high-conductivity guide.

[0024] Where X is the full exhaust area of ​​the low guide guide, is the average exhaust area of ​​the low-induction guides of multiple repaired engines, X={x1,x2,…,x n}, n is the total number of low-guide guides in the engine, x is the exhaust area of ​​a single low-guide guide measured in the digital work card, and Y is the exhaust area of ​​the entire high-guide guide. is the average exhaust area of ​​the high-guide guides of multiple repaired engines, Y={y1,y2,…,y m}, m is the total number of high-guide guides in the engine, y is the exhaust area of ​​a single high-guide guide measured in the digital work card, σ x is the standard deviation of the exhaust area of ​​all low-guide guides in the engine, σ y is the standard deviation of the exhaust area of ​​all low guide guides in the engine.

[0025] Optionally, the profiling tool comprises a feeler gauge and a profiling plate.

[0026] Optionally, the measuring of the guide vane profile of the engine currently being repaired using a profiling tool comprises:

[0027] Place the profiling plate close to the exhaust edge of the guide vane, and use a feeler gauge to measure the gap between the profiling plate and the exhaust edge of the guide vane. When the measured gap value meets the requirements, the profiling surface is considered qualified; when the measured gap value does not meet the requirements, the profiling surface is considered unqualified.

[0028] Optionally, the method of using a spraying device to perform coating restoration on the guide vane of the engine currently being repaired, and controlling the coating restoration thickness to satisfy that the exhaust area of ​​the single guide vane is within the first upper and lower limit range, comprises:

[0029] By adjusting the spraying equipment parameters, respectively spraying the guide vanes with different exhaust area sizes within the first upper and lower limit intervals, the spraying equipment parameters corresponding to the guide vanes whose exhaust area sizes after spraying are within the first upper and lower limit intervals are obtained, and the spraying equipment parameters are used as standard parameters, wherein the spraying equipment parameters include spraying speed, spraying time, and travel speed;

[0030] The coating of the guide vane is restored by using a spraying device adjusted to the standard parameters, so that the thickness of the restored coating is controlled to satisfy that the exhaust area of ​​the single guide vane is within the first upper and lower limit range.

[0031] Optionally, after selecting the guide spare parts, the method further comprises:

[0032] The engine currently being repaired is pre-assembled to obtain a full exhaust area measurement value of the pre-assembled engine. When the full exhaust area measurement value remains between the second upper and lower limit intervals, the pre-assembled engine meets the engine performance requirements.

[0033] The embodiments of the present application have the following advantages:

[0034] Compared with the prior art, the method provided by the above technical solution is based on the exhaust area measurement data of a single guide vane and the exhaust area measurement data of the entire engine after repair. By using data analysis, the first upper and lower limit intervals and the second upper and lower limit intervals for controlling the exhaust area are obtained to guide the repair and assembly of the engine, thereby controlling the exhaust area of ​​the entire vane of the guide vane after repair and assembly within a certain range, thereby reducing the guide vane troubleshooting rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0036] Figure 1 A flowchart of a method for controlling guide exhaust area measurement data provided by at least one embodiment of the present application;

[0037] Figure 2 A schematic diagram of guide vane profile detection for a guide vane exhaust area measurement data control method provided in at least one embodiment of the present application. DETAILED DESCRIPTION

[0038] The following is a description of the implementation of the present application by specific specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0041] The present application embodiment provides a method for controlling the measurement data of the exhaust area of ​​a guide valve, referring to Figure 1 ,include:

[0042] At step 101, the first upper and lower limit intervals for controlling the exhaust area of ​​a single guide vane and the second upper and lower limit intervals for controlling the exhaust area of ​​the entire vane are obtained; the subsequent repair team controls the exhaust area of ​​the guide vane around the middle limit and the upper and lower limit intervals to improve the quality of product delivery.

[0043] Specifically, in order to implement this method of using measurement data to evaluate engine performance, it is necessary to first obtain accurate data, analyze the theoretical test data of multiple turbine guide vane standard samples, calibrate the three-coordinate measuring machine used in the current production process, and add calibration coefficients to match the real data. In the production process, data processing methods are used to control the exhaust area within the adjustable range, so as to approach the optimal performance of the engine, reduce the number of troubleshooting times, and improve the first-time pass rate.

[0044] Specifically, the single-piece guide exhaust area refers to the exhaust area of ​​a single guide, and the entire engine exhaust area refers to the total exhaust area of ​​all high-guide guides or all low-guide guides in the entire engine.

[0045] Specifically, the first upper and lower limit intervals are preset value ranges that meet the technical standards for the exhaust area of ​​a single-piece guide.

[0046] In some embodiments, the step of obtaining the second upper and lower limit intervals for controlling the exhaust area of ​​the entire platform includes:

[0047] The exhaust area measurement data of a single guide and the exhaust area measurement data of the whole engine are obtained for a plurality of repaired engines, and the second upper and lower limit intervals for the exhaust area control of the whole engine are obtained by adopting the single value range control method.

[0048] In some embodiments, the single-valued range control method is used to obtain the second upper and lower limit intervals for controlling the exhaust area of ​​the entire platform, including:

[0049] Using the formula:

[0050] UCL x = +3σ x ,

[0051] UCL y = +3σ y ,

[0052] LCL x = -3σ x ,

[0053] LCL y = -3σ y ,

[0054] Get the second upper limit UCL of the full exhaust area control of the low guide guide x , the second lower limit LCL x , the second upper limit UCL of the full exhaust area control of the high-conductivity guide y , the second lower limit LCL y , the second upper limit UCL x and the second lower limit LCL x The exhaust area between is the second upper and lower limit interval for controlling the exhaust area of ​​the whole stage of the low guide guide, and the second upper limit UCL y and the second lower limit LCL y The exhaust area between is the second upper and lower limit range for controlling the exhaust area of ​​the whole stage for the high-conductivity guide.

[0055] Where X is the full exhaust area of ​​the low guide guide, is the average exhaust area of ​​multiple low-guide guides after repair, X={x1,x2,…,x n}, n is the total number of low-guide guides in the engine (e.g. n=15), x is the exhaust area of ​​a single low-guide guide measured in the digital work card, and Y is the exhaust area of ​​the entire high-guide guide. is the average exhaust area of ​​multiple high-conductivity guides after repair, Y={y1,y2,…,y m}, m is the total number of high-guide guides in the engine (e.g. m=23), y is the exhaust area of ​​a single high-guide guide measured in the digital work card, σ x is the standard deviation of the exhaust area of ​​all low-guide guides in the engine, σ yis the standard deviation of the exhaust area of ​​all low guide guides in the engine.

[0056] Specifically, the guides in the engine include two types: high guide and low guide. Therefore, when the method of the present application is used to process the high guide guide, the first upper and lower limits are the value ranges that meet the technical standards for the exhaust area of ​​a single high guide guide, and the second upper and lower limits are the total exhaust area of ​​all high guide guides in the engine, that is, the second upper limit UCL. y and the second lower limit LCL y When the method of the present application is used to process a low-guide guide, the first upper and lower limits are the range of values ​​that meet the technical standards for the exhaust area of ​​a single low-guide guide, and the second upper and lower limits are the total exhaust area of ​​all low-guide guides in the engine, that is, the second upper limit UCL y and the second lower limit LCL y Exhaust area between.

[0057] In some embodiments, it also includes:

[0058] Using the formula:

[0059] CL x = ,

[0060] CL y = ,

[0061] Low-guide guide full exhaust area control of the middle limit CL x , the middle limit CL of the full exhaust area control of the high-conductivity guide y .

[0062] In some embodiments, the method further includes: using the formula:

[0063] UCL z = +3σ z ,

[0064] LCL z = -3σ z ,

[0065] CL z = ,

[0066] Get the upper control limit UCL of the exhaust area ratio of the low-conductivity / high-conductivity guider z , the lower limit LCL of the ratio of the exhaust area of ​​the low-conductivity / high-conductivity guide z , the low-inductance / high-inductance guider's full exhaust area ratio controls the middle limit CL z, where Z is the ratio of the exhaust area of ​​the low-conductivity / high-conductivity guider, Z=X / Y, σ z is the standard deviation of the set Z. The upper and lower limits of the ratio control are to match the engine performance, and the performance will be better when it is at the average value. In the embodiment of the present application, the upper and lower limits of the ratio control and the middle limit of the ratio control are mainly used for reference.

[0067] At step 102, a profile calibration tool is used to measure the profile of the guide vane of the engine currently being repaired, and the guide vane with unqualified profile is calibrated by cold calibration or hot calibration.

[0068] Specifically, by identifying the repair process of the guide vane, it is found that the factors affecting the exhaust area of ​​the guide vane mainly include: surface deformation and coating recovery thickness.

[0069] In some embodiments, the profiling tool comprises: a feeler gauge and a profiling plate.

[0070] refer to Figure 2 In some embodiments, the step of measuring the guide vane profile of the engine being repaired using a profiling tool comprises:

[0071] Place the profiling plate 202 close to the exhaust edge 201 of the guide vane (approximately 10 mm inward from the blade tip), and use a feeler gauge to measure the gap between the profiling plate and the exhaust edge of the guide vane. When the measured gap value meets the requirements, the profiling surface is considered qualified; when the measured gap value does not meet the requirements, the profiling surface is considered unqualified.

[0072] At step 103, the coating of the guide vane of the engine currently being repaired is restored by using a spraying device, and the thickness of the restored coating is controlled to ensure that the exhaust area of ​​the single guide vane is within the first upper and lower limit range.

[0073] Specifically, the coating recovery thickness directly affects the size of the exhaust area of ​​the guide vane.

[0074] In some embodiments, the method of using a spraying device to perform coating restoration on the guide vane of the engine currently being repaired, and controlling the coating restoration thickness to satisfy that the exhaust area of ​​the single guide vane is within the first upper and lower limit range, comprises:

[0075] By adjusting the spraying equipment parameters, the guide vanes with different exhaust area sizes within the first upper and lower limit range are sprayed respectively, and the spraying equipment parameters corresponding to the guide vanes whose exhaust area size after spraying is within the first upper and lower limit range are obtained, and the spraying equipment parameters are used as standard parameters, and the spraying equipment parameters include spraying speed, spraying time, travel speed, etc.;

[0076] The coating of the guide vane is restored by using a spraying device adjusted to standard parameters, so that the thickness of the restored coating is controlled to satisfy that the exhaust area of ​​the single-piece guide vane is within the first upper and lower limit range.

[0077] At step 104, the exhaust area of ​​the single-piece guide vane after the coating is restored is measured using a three-coordinate measuring machine to obtain a single-piece exhaust area measurement value and complete the record.

[0078] Specifically, the standard part is first measured using a three-coordinate measuring machine, and the calibration coefficient is obtained based on the relationship between the measured value and the true value. After the calibration coefficient is added to the three-coordinate measuring machine, the exhaust area of ​​the single-piece guide vane restored with the coating is measured to obtain the single-piece exhaust area measurement value.

[0079] At step 105, by matching the measured value of the exhaust area of ​​the single-piece guide after the coating is restored, a guide spare part is selected so that the exhaust area of ​​the entire engine currently being repaired is within the second upper and lower limit range.

[0080] In some embodiments, after selecting the guide spare part, the process further includes:

[0081] The engine currently being repaired is pre-assembled to obtain a full exhaust area measurement value of the pre-assembled engine. When the full exhaust area measurement value remains between the second upper and lower limit intervals, the pre-assembled engine meets the engine performance requirements.

[0082] Specifically, the exhaust area measurement value of the entire engine after pre-assembly is obtained by using a simulation tool for measuring the exhaust area of ​​the turbine guide vane. The exhaust surface of the guide vane is simulated and measured by the tool, that is, the area size of the location is calculated by using the distance between the relevant points, and then the three-coordinate measurement data is matched by the software calibration coefficient, so that the error between the tool measurement data and the three-coordinate measurement data does not exceed 0.5%.

[0083] In summary, compared with the prior art, the method provided by the above technical solution is based on the exhaust area measurement data of a single guide device and the exhaust area measurement data of the entire engine after repair. By using data analysis, the first upper and lower limit intervals and the second upper and lower limit intervals for controlling the exhaust area are obtained to guide the repair and assembly of the engine, thereby controlling the exhaust area of ​​the entire guide device after repair and assembly within a certain range, thereby reducing the guide device troubleshooting rate.

[0084] Note that, unless otherwise directly stated, all features disclosed in this specification (including any attached claims, abstracts and drawings) may be replaced by alternative features for achieving the same, equivalent or similar purposes. Therefore, unless otherwise explicitly stated, each feature disclosed is only an example of a group of equivalent or similar features. Where used, further, preferably, further and more preferably are simple beginnings for elaborating another embodiment based on the aforementioned embodiment, and the content of further, preferably, further or more preferably followed by the aforementioned embodiment is combined with the complete composition of another embodiment. Several further, preferably, further or more preferably settings following the same embodiment can be arbitrarily combined to form another embodiment.

[0085] In the implementation of functions and steps, the corresponding functions and steps in various embodiments may also occur in a different order than shown. For example, two consecutive functions and steps may actually be performed or implemented substantially in parallel, and they may sometimes be performed or implemented in the opposite order, depending on the functions involved.

[0086] Although the present application has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made to the present application. Therefore, these modifications or improvements made without departing from the spirit of the present application all fall within the scope of protection claimed in the present application.

Claims

1. A method for controlling the measurement data of the exhaust area of ​​a guide vane, characterized in that: include: Obtain the first upper and lower limit intervals for controlling the exhaust area of ​​a single guide, and the second upper and lower limit intervals for controlling the exhaust area of ​​the entire stage, wherein: The first upper and lower limits are preset value ranges that meet the technical standards for the exhaust area of ​​a single-piece guide. The obtaining of the second upper and lower limit intervals for controlling the exhaust area of ​​the entire platform includes: Obtain the exhaust area measurement data of a single guide and the exhaust area measurement data of the entire engine after repair, and use the single value range control method to obtain the second upper and lower limit intervals for the exhaust area control of the entire engine. The single value range control method is adopted to obtain the second upper and lower limit intervals for the whole exhaust area control, including: Using the formula: Obtain the second upper limit UCL of the full exhaust area control of the low guide guide x , the second lower limit LCL x , the second upper limit UCL of the full exhaust area control of the high-conductivity guide y , the second lower limit LCL y , the second upper limit UCL x and the second lower limit LCL x The exhaust area interval between is the second upper and lower limit interval for the full stage exhaust area control of the low guide guide, and the second upper limit UCL y and the second lower limit LCL y The exhaust area interval between is the second upper and lower limit interval for the full exhaust area control of the high-conductivity guide. Where X is the full exhaust area of ​​the low guide guide, is the average exhaust area of ​​the low-induction guides of multiple repaired engines, X = {x1, x2, ..., x n }, n is the total number of low-guide guides in the engine, x is the exhaust area of ​​a single low-guide guide measured in the digital work card, and Y is the exhaust area of ​​the entire high-guide guide. is the average exhaust area of ​​the high-guide guides of multiple repaired engines, Y = {y1, y2, ..., y m }, m is the total number of high-guide guides in the engine, y is the exhaust area of ​​a single high-guide guide measured in the digital work card, σ x is the standard deviation of the exhaust area of ​​all low-guide guides in the engine, σ y is the standard deviation of the exhaust area of ​​all low-guide guides in the engine; Use the profiling tool to measure the guide vane profile of the engine currently being repaired, and calibrate the guide vanes with unqualified profiles; Using a spraying device to restore the coating of the guide vane of the engine currently being repaired, and controlling the thickness of the restored coating to ensure that the exhaust area of ​​the single guide vane is within the first upper and lower limit range; The exhaust area of ​​the single-piece guide vane after the coating is restored is measured by using a three-coordinate measuring machine to obtain the single-piece exhaust area measurement value; By matching the single-piece exhaust area measurement value, the guide spare part is selected so that the entire exhaust area of ​​the engine currently being repaired is within the second upper and lower limit range.

2. The method for controlling the guide exhaust area measurement data according to claim 1, characterized in that: The profiling tool comprises a feeler gauge and a profiling plate.

3. The method for controlling the guide exhaust area measurement data according to claim 2, characterized in that: The method of measuring the guide vane profile of the engine being repaired by using the profiling tool comprises: Place the profiling plate close to the exhaust edge of the guide vane, and use a feeler gauge to measure the gap between the profiling plate and the exhaust edge of the guide vane. When the measured gap value meets the requirements, the profiling surface is considered qualified; when the measured gap value does not meet the requirements, the profiling surface is considered unqualified.

4. The method for controlling the guide exhaust area measurement data according to claim 1, characterized in that: The method of using the spraying equipment to restore the coating of the guide vane of the engine currently being repaired, and controlling the thickness of the restored coating to satisfy the exhaust area of ​​the single guide vane being within the first upper and lower limit range, comprises: By adjusting the spraying equipment parameters, respectively spraying the guide vanes with different exhaust area sizes within the first upper and lower limit intervals, the spraying equipment parameters corresponding to the guide vanes whose exhaust area sizes after spraying are within the first upper and lower limit intervals are obtained, and the spraying equipment parameters are used as standard parameters, wherein the spraying equipment parameters include spraying speed, spraying time, and travel speed; The coating of the guide vane is restored by using a spraying device adjusted to the standard parameters, so that the thickness of the restored coating is controlled to satisfy that the exhaust area of ​​the single guide vane is within the first upper and lower limit range.

5. The method for controlling the guide exhaust area measurement data according to claim 1, characterized in that: After selecting the guide spare parts, it also includes: The engine currently being repaired is pre-assembled to obtain a full exhaust area measurement value of the pre-assembled engine. When the full exhaust area measurement value remains between the second upper and lower limit intervals, the pre-assembled engine meets the engine performance requirements.

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