Blade equivalent detection data acquisition device and acquisition method

Abstract

The invention discloses a blade equivalent detection data acquisition device and method, and the device comprises a measurement tool which is provided with an installation cavity matched with a to-be-measured blade; the measuring platform is used as a structural support, and a positioning part for mounting a measuring tool is arranged in the middle of the measuring platform; the displacement detection assemblies are arranged on the measurement platform in a manner of being matched with the measurement positions of the to-be-measured blades in number; the moving mechanism is arranged on the measuring platform and used for driving the displacement detection assembly to move towards the measuring tool or move away from the measuring tool so as to enable the displacement detection assembly to obtain position data of the measuring point of the to-be-measured blade; and the data processing device is electrically connected with the displacement detection assembly and is used for receiving the position data of the measurement point positions acquired by the displacement detection assembly and calculating an equivalent value.

Description

Technical Field

[0001] This invention relates to the field of aero-engine blade processing technology, and in particular, to a blade equivalent measurement data acquisition device. Furthermore, this invention also relates to a blade equivalent measurement data acquisition method including the aforementioned blade equivalent measurement data acquisition device. Background Technology

[0002] In the field of aero-engine blade manufacturing and repair, the blade body and flow channel are typically precision cast without margin, with the machined parts mainly consisting of the lateral flanges. The process for determining the torsional relationship between the blade body profile and the lateral flanges is commonly referred to as equivalent machining. Whether this process can be accurately inspected and manufactured directly determines the size of the throat area. The throat area is a core parameter for measuring engine aerodynamic performance; even minor changes can directly alter engine speed, net thrust, and fuel consumption rate. Therefore, precise inspection and control of blade equivalent machining are crucial.

[0003] Currently, the relationship between the blade profile and the torsional relationship of the shroud is generally obtained by casting low-melting-point alloys, such as... Figure 1 As shown, before casting, the blade is fixed in the casting fixture box. After determining the correct blade profile and the torsional relationship of the blade edge, a low-melting-point alloy is directly poured into the blade edge area. After cooling, the solidified alloy on both sides forms a unified workpiece with the blade, establishing a rigid reference. Finally, the blade edge on both sides is ground to the specified dimensions. This method requires a large low-melting-point alloy melting room and casting equipment, making the scheme expensive and the processing operation complex. The trace amounts of low-melting-point alloy remaining on the blade pose a potential source of pollution, necessitating alternative processing methods.

[0004] Another method is to use equivalent detection, such as... Figure 2 As shown, this method has been described in the technical solution of the blade equivalent measuring tool and blade equivalent detection method, as disclosed in publication number CN109357582B. During detection, the blade is positioned on the equivalent measuring tool with the machined side edge plates. The measuring tool performs contact detection at two points each on the blade head and blade back at selected sections I-I and III-III (simulating the spatial state of the blade body using key section points, which differs significantly from conventional planar dimension measurements and requires simultaneous completion in a single measurement process). The equivalent value is obtained from four data points using a prescribed calculation method, and the blade body attitude is sequentially fed back to determine if it is within the acceptable range. The operator adjusts the machined edge plate surface through multiple "detection-processing" interactions (e.g., ...). Figure 1 The method involves determining the surface orientation and allowance during the machining process (as shown in the diagram) to obtain data on the mutual torsion between the profile and the flange. While this method offers high processing flexibility, it suffers from slow equivalent detection speed. It requires manual reading of dial gauge values ​​at four detection points and subsequent calculations, which can easily introduce human reading errors. This low detection efficiency is particularly pronounced in mass-production of blades. Summary of the Invention

[0005] This invention provides a blade equivalent detection data acquisition device and method to solve the technical problem of low efficiency in manual equivalent detection in the prior art.

[0006] According to one aspect of the present invention, a blade equivalent detection data acquisition device is provided, the acquisition device comprising: The measuring tool has a mounting cavity that matches the blade to be measured; A measuring platform is used as a structural support, and a positioning part for mounting measuring instruments is provided in the middle of the measuring platform; A displacement detection component is installed on the measurement platform, matching the number of measurement positions of the blade to be measured; A moving mechanism, located on the measuring platform, is used to drive the displacement detection component to move toward or away from the measuring tool, thereby enabling the displacement detection component to acquire position data of the measurement point of the blade to be measured. A data processing device, electrically connected to the displacement detection component, is used to receive the position data of the measurement points collected by the displacement detection component and calculate the equivalent value.

[0007] As a further improvement to the above technical solution, the measuring instrument has measuring channels on both sides that are matched to the position to be measured, for passing through measuring rods. The measuring channels are provided with measuring rods for contacting the measuring position of the blade to be measured. The two ends of the measuring channels are respectively connected to the outer wall of the measuring instrument and the mounting cavity. The displacement detection assembly includes a displacement detection unit for electrical connection with the measuring rod, and the displacement detection unit is disposed in the moving mechanism.

[0008] As a further improvement to the above technical solution, the displacement detection component includes a measuring element disposed on the moving mechanism and arranged between the displacement detection unit and the measuring rod, the measuring element being disposed on the moving mechanism.

[0009] As a further improvement to the above technical solution, the moving mechanism includes a linear actuator located on one side of the positioning part of the measuring platform and a sliding mechanism disposed on the linear actuator. The number of sliding mechanisms matches the number of measuring channels on the corresponding side of the measuring instrument. The measuring element is disposed on the sliding mechanism, and a damping structure is provided between the measuring element and the fixed part of the sliding mechanism, or a damping structure is provided between the measuring element and the linear actuator.

[0010] As a further improvement to the above technical solution, the linear actuator is a pneumatic slide table. A pneumatic slide table is respectively provided on both sides of the positioning part. A control valve connected to an air source is provided on the measuring platform. The control valve is respectively connected to the air inlet and air outlet of each linear actuator. The control valve is used to synchronously control the movement of each pneumatic slide table.

[0011] As a further improvement to the above technical solution, the damping structure includes an elastic element and an adjusting element for adjusting the position of the elastic element.

[0012] As a further improvement to the above technical solution, the measuring element has a mating end face facing the measuring rod and a mating end facing the displacement detection unit. The mating end face is connected to the measuring rod or abuts against the measuring rod to match the position of the measuring channel of different measuring instruments.

[0013] As a further improvement to the above technical solution, the positioning part is provided with a first positioning pin, a second positioning pin and a third positioning pin. The first positioning pin is used to cooperate with the first side of the measuring tool for positioning, and the second positioning pin and the third positioning pin are respectively cooperated with the second side of the measuring tool for positioning. The first side and the second side are adjacent surfaces.

[0014] As a further improvement to the above technical solution, the data processing device includes a multi-channel displacement display, comprising a housing, a display module, a power module, and a motherboard equipped with an equivalent measurement program.

[0015] According to another aspect of the present invention, a method for acquiring blade equivalent detection data is also provided, comprising the aforementioned blade equivalent detection data acquisition device, wherein the method comprises: S1. Preparation for testing; S2. Position and clamp the measuring instrument at the positioning part; S3. Install the standard parts for calibration, and remove the standard parts after calibration; S4. Install the blade to be tested for inspection.

[0016] The present invention has the following beneficial effects: This data acquisition device uses a measurement platform as its structural support. Positioning units are arranged on the platform to locate and install measuring instruments. The measuring instruments are used to mount the blade to be tested. A moving mechanism is installed on the measurement platform, and the number of displacement detection components matches the number of measurement positions on the blade. Before actual testing, a standard component is first installed for calibration. The moving mechanism drives the displacement detection components to contact and measure the position data of the standard component. After the readings are zeroed and calibration is complete, the blade to be tested is then assembled onto the measuring instrument. The moving mechanism's action is repeated to drive the displacement detection components to contact and measure the position data of the blade, converting it into digital values. The data processing device calculates the total equivalent value required for the calculation section according to a predetermined program, realizing the automatic detection of blade throat equivalent data. The acquisition, processing, and output methods avoid the errors inherent in traditional manual reading of dial gauge values ​​and manual readings, eliminating the need for manual input of values ​​into the data processing device, thus significantly improving testing efficiency and overall production efficiency. Furthermore, the measurement platform is equipped with positioning seats to install measuring instruments, which can be fitted with mounting cavities for various blade models and specifications. This allows the acquisition device to be adapted to collect equivalent data from different blade models and specifications simply by changing the measuring instruments. Moreover, the application of this acquisition device can replace the traditional casting low-melting-point alloy processing technology for all rigid guide blades, enriching process options, avoiding alloy contamination, and saving the high investment in fixed equipment and the construction costs of dedicated testing rooms associated with low-melting-point alloy processes. This reduces overall costs from multiple dimensions, including equipment, consumables, manpower, and time.

[0017] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of an existing technology that uses casting low-melting-point alloys to obtain the torsional relationship between the blade profile and the shroud of a guide vane; Figure 2 This is a schematic diagram of an existing equivalent detection method; Figure 3 This is a schematic diagram of a preferred embodiment of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of a preferred embodiment of the present invention. Figure 2 ; Figure 5 yes Figure 4 Sectional view along direction B; Figure 6This is a schematic diagram of the system working principle of a preferred embodiment of the present invention; Figure 7 This is a schematic diagram of the measuring tool positioning according to Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the measurement status of the data acquisition device according to Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the positive and negative values ​​of the detection value in Embodiment 1 of the present invention.

[0019] Legend: 1. Measuring platform; 2. Support plate; 3. Positioning part; 4. First positioning pin; 5. First screw; 6. Control valve; 7. Bolt; 8. Guide pin; 9. Connecting plate; 10. Adjusting component; 11. Elastic component; 12. Measuring component; 13. Second screw; 14. Third screw; 15. Sliding mechanism; 16. Gauge clamp screw; 17. Gauge clamp sleeve; 18. Displacement detection unit; 19. Mounting base; 20. Fourth screw; 21. Linear actuator; 22. Second positioning pin; 23. Third positioning pin; 24. Support leg; 25. First nut; 26. Pressure plate; 27. Stud; 28. Second nut; 29. ​​Fifth screw; 30. Mounting bracket; 31. Four-channel displacement display instrument; 32. Large air tube; 33. Reducing tee; 34. Small air tube. Detailed Implementation

[0020] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0021] Figure 3 This is a schematic diagram of a preferred embodiment of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of a preferred embodiment of the present invention. Figure 2 ; Figure 5 yes Figure 4 Sectional view along direction B; Figure 6 This is a schematic diagram of the system working principle of a preferred embodiment of the present invention; Figure 7 This is a schematic diagram of the measuring tool positioning according to Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the measurement status of the data acquisition device according to Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the positive and negative values ​​of the detection value in Embodiment 1 of the present invention.

[0022] like Figures 3 to 9 As shown, the blade equivalent detection data acquisition device of this embodiment includes: The measuring tool has a mounting cavity that matches the blade to be measured; The measuring platform 1 serves as a structural support, and a positioning part 3 for mounting measuring instruments is provided in the middle of the measuring platform 1. The displacement detection component is set on the measurement platform 1, matching the number of measurement positions of the blade to be measured; The moving mechanism, set on the measuring platform 1, is used to drive the displacement detection component to move towards or away from the measuring tool, thereby enabling the displacement detection component to acquire the position data of the measuring point of the blade to be measured. The data processing device is electrically connected to the displacement detection component and is used to receive the position data of the measurement points collected by the displacement detection component and calculate the equivalent value.

[0023] Understandably, this data acquisition device uses a measurement platform 1 as a structural support, with a positioning part 3 arranged on the measurement platform 1 to position and install the measuring instrument. The measuring instrument is used to install the blade to be tested. A moving mechanism is set on the measurement platform 1, and the number of displacement detection components is matched to the number of measurement positions of the blade to be tested. Before the actual test, a standard part is first installed for calibration. The moving mechanism drives the displacement detection components to contact and measure the position data of the measurement position on the standard part. After the reading is zeroed and calibration is completed, the blade to be tested is then assembled on the measuring instrument. The moving mechanism is used to drive the displacement detection components to contact and measure the position data of the measurement position on the blade to be tested and convert it into a digital value. The data processing device calculates the total equivalent value required for the calculation section according to a predetermined program, realizing the equivalent detection of the blade throat. The automatic data acquisition, processing, and output avoid the errors inherent in traditional manual reading of dial gauge values ​​and manual readings, and eliminate the need for manual input of values ​​into the data processing device, significantly improving testing efficiency and overall production efficiency. Furthermore, the measurement platform 1 is equipped with a positioning seat for mounting measuring instruments, which can be configured with mounting cavities for various blade models and specifications. This allows the acquisition device to adapt to the acquisition of equivalent data from different blade models and specifications simply by changing the measuring instruments. Moreover, the application of this acquisition device can replace the traditional casting low-melting-point alloy processing technology for all rigid guide blades, enriching process options, avoiding alloy contamination, and saving the high investment in fixed equipment and the construction costs of dedicated testing rooms associated with low-melting-point alloy processes. This reduces overall costs from multiple dimensions, including equipment, consumables, manpower, and time.

[0024] In some preferred embodiments, the measuring instrument has measuring channels on both sides corresponding to the positions to be measured, for passing through measuring rods. The two ends of the measuring channels are respectively connected to the outer wall of the measuring instrument and the mounting cavity. The measuring channels are provided with measuring rods for contacting the measuring positions of the blade to be measured. The displacement detection assembly includes a displacement detection unit 18 for electrical connection with the measuring rod. The displacement detection unit 18 is disposed in the moving mechanism. It is understood that the measuring instrument can be implemented with reference to the measuring instruments of the prior art, and the displacement detection unit 18 is implemented by the displacement sensor of the prior art. The moving mechanism drives the displacement detection unit 18 to move towards the measuring instrument. When the measuring end of the displacement detection unit 18 abuts against the top of the measuring rod, the two are electrically connected. At the same time, the moving assembly moves further to drive the measuring rod to contact the measuring position on the blade inside the measuring instrument, thereby realizing the detection.

[0025] In some preferred embodiments, the displacement detection assembly includes a measuring element 12 disposed on the moving mechanism and arranged between the displacement detection unit 18 and the measuring rod. The measuring element 12 is disposed on the moving mechanism, and by setting the measuring element 12, the displacement detection unit 18 can maintain contact with the measuring element 12. Both the displacement detection unit 18 and the measuring element 12 are disposed on the moving mechanism. The moving mechanism drives the displacement detection unit 18 and the measuring element 12 to move synchronously, thereby causing the measuring element 12 to contact the measuring rod and drive the measuring rod to contact the blade to be measured. This allows the minute displacement of the measuring plate to be captured more accurately by the displacement detection unit 18, and enables rapid switching between detection and exit states in the detection process. On the other hand, by setting the measuring element 12, the contact area for cooperation with the measuring rod can be increased. The position of the measuring channel of the measuring tool for different blades will have certain differences. By setting the measuring element 12, the position of the measuring channel of different measuring tools can be adapted. Therefore, by applying this acquisition device, when dealing with different types of blades, only the corresponding measuring tool needs to be replaced to install the blade. The measuring element 12 can cooperate with the measuring rod within a certain range to ensure its electrical connection with the displacement detection unit 18 during the detection process, thereby improving the applicability of the device.

[0026] It should be noted that the measuring rod is preferably built into the measuring channel of the measuring instrument. A reset component is set between the measuring rod and the measuring instrument. After the measuring plate drives the measuring rod to move in the direction of the blade and completes the test, the measuring rod is reset by the reset component. In some preferred embodiments, the moving mechanism includes a linear actuator 21 located on one side of the positioning part 3 on the measuring platform 1 and a sliding mechanism 15 disposed on the linear actuator 21. The number of sliding mechanisms 15 matches the number of measuring channels on the corresponding side of the measuring instrument. A measuring element 12 is disposed on the sliding mechanism 15, and a damping structure is provided between the measuring element 12 and the fixed part of the sliding mechanism 15, or a damping structure is provided between the measuring element 12 and the linear actuator 21. It can be understood that by setting the linear actuator 21 to move, the sliding mechanism 15 and the displacement detection assembly on the sliding mechanism 15 move as a whole towards the measuring instrument. The measuring plate moves the measuring rod towards the blade to the contact blade measurement position. The measuring plate and the measuring rod stop moving, the linear actuator 21 continues to move, and the damping structure moves it. The system is buffered until it reaches its maximum stroke. At this point, the position of the probe in each displacement detection unit 18 is the corresponding position data collected, and its offset value relative to the reference value during calibration is the detection value. By setting up linear actuators 21 and sliding mechanisms 15 respectively, multiple sliding mechanisms 15 can be driven by the linear actuator 21 to move synchronously towards the measuring tool. Each sliding mechanism is equipped with a set of displacement detection components, thereby enabling data acquisition of multiple measurement positions by a single linear actuator 21, making the overall structure compact and simplified. Based on this, a damping structure is further set between the measuring element 12 on the sliding mechanism 15 and the fixed part of the sliding mechanism 15 to form damping at the end of the stroke. This damping limits the force of the measuring plate when it acts on the probe, preventing excessive force from damaging the probe, improving service life and measurement accuracy.

[0027] In some preferred embodiments, the damping structure includes an elastic element 11, such as a spring, and an adjusting member 10 for adjusting the position of the elastic element 11. The position of the elastic element 11 is adjusted by adjusting the adjusting member 10, thereby adjusting the stroke position of the elastic element 11. Different compression amounts are obtained during and at the end of the stroke, thereby adjusting the damping effect.

[0028] In some preferred embodiments, the linear actuator 21 is a pneumatic slide. A pneumatic slide is provided on each side of the positioning part 3, which corresponds to the measurement channels provided on each side of the measuring instrument. A control valve 6 connected to an air source is provided on the measuring platform 1. The control valve 6 is connected to the air inlet and air outlet of each linear actuator 21. The specific connection method between the control valve 6 and the pneumatic slide is existing technology and will not be described in detail. The movement of each pneumatic slide is synchronously controlled by the control valve 6. It can be understood that the use of pneumatic slides makes it easy to adjust the speed of the moving mechanism and ensure stable operation. Furthermore, by setting the control valve 6 to connect to each pneumatic slide, the control is realized so that the two pneumatic slides are driven to move synchronously by one air source, and the detection and exit control is completed by one control valve 6. Data of each point can be collected in one detection operation. The operation is convenient and the overall structure of the device is compact and simple.

[0029] It should be understood that the sliding mechanism 15 can be implemented using existing technologies such as linear guides and slides; In some preferred embodiments, the measuring element 12 has a mating end face facing the measuring rod and a mating end facing the displacement detection unit 18. The mating end face is connected to the measuring rod or abuts against the measuring rod to match the position of the measuring channel of different measuring instruments. It can be understood that the measuring element 12 in this preferred embodiment is an L-shaped measuring plate. On the one hand, the mating end face has sufficient mating area to match the position of the measuring channel / measuring rod of different measuring instruments, while ensuring that the mating end and the probe of the position detection component can make perpendicular contact, that is, ensure point contact and ensure measurement accuracy. On the other hand, the other opposite end face of the mating end face can be easily set with the aforementioned damping structure to achieve buffering at the end of the stroke. Moreover, the overall structure is compact and reasonable, reducing the space occupied by the device and avoiding structural complexity.

[0030] In some preferred embodiments, the positioning part 3 is provided with a first positioning pin 4, a second positioning pin 22, and a third positioning pin 23. The first positioning pin 4 is used to cooperate with the first side of the measuring tool for positioning, and the second positioning pin 22 and the third positioning pin 23 are respectively used to cooperate with the second side of the measuring tool for positioning. The first side and the second side are adjacent surfaces. It can be understood that the measuring tool is positioned by setting three positioning pins. A clamping mechanism is provided on one side of the positioning part 3 to press the positioned measuring tool onto the measuring platform 1 to complete the positioning and clamping of the measuring tool. The operation is convenient and the structure is compact and simple.

[0031] In some preferred embodiments, the data processing device includes a multi-channel displacement display, comprising a housing, a display module, a power module, and a motherboard equipped with an equivalent measurement program. The collected data is calculated and then fed back to the display module for display. The data processing device can be implemented based on existing display screens, microcomputers, power supplies, etc., which will not be elaborated on further. The data processing device used in this device is small in size, and with the aforementioned structure, the entire device is miniaturized and highly portable. It can realize on-line testing and portable transfer between multiple production lines without the need to transfer the blades to a separate measurement workshop for data collection.

[0032] On the other hand, a preferred embodiment of the present invention also provides a method for acquiring blade equivalent detection data, which utilizes the aforementioned blade equivalent detection data acquisition device. The method for acquiring blade equivalent detection data includes: S1. Preparation for testing; S2. Positioning and clamping the measuring tool at the positioning part 3; S3. Install the standard parts for calibration, and remove the standard parts after calibration; S4. Install the blade to be tested for inspection.

[0033] This data acquisition method, using the acquisition device of this preferred embodiment, allows for calibration with standard parts before testing. In actual testing, the blade only needs to be placed in the measuring tool, and the data acquisition, calculation, and output can be completed by controlling the movement mechanism. The blade can be removed by controlling the movement mechanism to exit again. Repeating this step can achieve continuous and rapid batch testing of blades.

[0034] Example 1 In this embodiment, referring to the existing blade equivalent detection technology, the measuring instrument is set with 4 measuring channels, two on the blade basin side and two on the blade back side. That is, two sets of displacement detection components and two sets of pneumatic slides are respectively set on both sides of the positioning part 3. Two sets of linear guides are set on each pneumatic slide, and a set of displacement detection unit 18 and a measuring element 12 are set on each linear guide. The multi-channel displacement display instrument is a four-channel displacement display instrument 31.

[0035] The measuring platform 1 specifically includes a base plate, the front end of which is set as the measuring face, with a square groove in the middle for placing measuring instruments. A positioning plate is set at the square groove to accommodate the first positioning pin 4, the second positioning pin 22, and the third positioning pin 23. The positioning plate has a certain height difference with the base plate to facilitate the matching of the mating end face of the measuring component 12 with the height of the measuring rod, thereby adapting to various specifications of equivalent measuring instruments and improving its versatility. The control valve 6 is a manual direct-acting two-position five-way valve with one air inlet, two air outlets, and two exhaust ports. The air path is switched internally by swinging the switch handle. A connecting plate 9 is also provided between the pneumatic slide and the linear guide rail; the displacement sensor mounting base 19 and the linear guide rail are both mounted on the connecting plate 9. The positioning plate is fastened by the first screw 5. A support plate 2 and support legs 24 are provided at the bottom of the base plate. The control valve 6 is fixed to the base plate by bolts 7; guide pins 8 are provided on both sides of the measuring component 12 to cooperate with the side wall of the linear guide rail to prevent the measuring component 12 from deflecting after long-term use; the measuring component 12 is installed on the linear guide rail by the second screw 13 and the third screw 14; the clamping assembly includes a pressure plate 26, which is set on the measuring platform 1 by studs 27, the first nut 25 and the second nut 28; the four-channel displacement display 31 is set on the mounting bracket 30 and fixed to one side of the measuring platform 1 by the fifth screw 29; pneumatic components such as the pneumatic slide table and the control valve 6 are connected by a reducing tee 33, a large air pipe 32, and a small air pipe 34; the pneumatic slide table is equipped with a throttle valve to control the speed, the pneumatic slide table is equipped with a first quick connector, the control valve 6 is equipped with a second quick connector for quick insertion and removal of the air pipe, and a silencer is also provided to reduce noise; The displacement detection unit 18 uses an LVTD differential displacement sensor, specifically an anti-interference pen-type series, to detect displacement. The displacement sensor contacts the measuring end of the measuring component 12 at a perpendicular angle, ensuring that it still has a compression of 1-2 mm in the detection state. It should be noted that whether the displacement value generated by the measured dimension is positive or negative does not depend on the extension or retraction state of the displacement sensor, but is determined by the system's own setting based on the following principle for determining the positive or negative value of the probe: when set to "shaft", the direction of increase of the measured dimension L is consistent with the direction of increase of the displacement sensor's displacement value, then a positive value is taken; when set to "hole", the direction of increase of the measured dimension L is opposite to the direction of increase of the displacement sensor's displacement value, then a negative value is taken. The mounting base 19 is fixedly installed on the connecting plate 9 by the fourth screw 20, and the probe of the displacement sensor passes through the gauge clip 17, is mounted on the mounting base 19, and is fixed by the gauge clip screw 16.

[0036] The four-channel displacement display consists of a microcomputer, a display screen, a power plug, and a housing, all designed to meet functional requirements. The screen has touch functionality, enabling measurement-related operations. It can simultaneously and accurately detect, calculate, and display the displacement mechanical quantities of four channels in real time. Based on existing technology, a dedicated software program developed in C++ is installed on the microcomputer for equivalent measurement. The main operating interface allows access to relevant function modules. Five function keys are provided: "Read Process Document F2," "Edit Process Document," "Read Alignment File F3," "Alignment and Edit Alignment File," and "Start Measurement F6." Double-clicking the corresponding key allows for further operation.

[0037] The data acquisition method in this embodiment includes: S1. Preparation for testing; Specifically, adjust the air source pressure to 0.2–0.3 MPa; move the control valve handle to push the measuring piece to the non-working position; check the surface condition of the measuring platform, measuring tools, standard parts, and blades, and remove dirt and chips; S2. Position and clamp the measuring instrument at the positioning part; Specifically, place the bottom of the measuring instrument on the positioning part and position it close to the three positioning pins on the positioning plate. Finally, tighten the second nut and press it with the pressure plate. S3. Install the standard parts for calibration, and remove the standard parts after calibration; Specifically, enter the inspection software, edit or read the part process file, set basic information such as part drawing number, operation number, operation name, flow card, etc.; set the inspection dimension name and tolerance range, as well as the corresponding probe number; set the direction of the dimension to be measured; Taking the first-stage turbine blade of type I as an example, the points detected on the I-I and III-III sections of the blade body are FL, FJ, FM, and FK. The corresponding dimensions in the process document are T1, T2, T3, and T4. The upper and lower tolerances of each dimension are set to 0.2 and -0.2 respectively. The equivalent inspection result is considered qualified if all of the following conditions are met: -0.2 ≤ T1 ≤ 0.2; -0.2 ≤ T2 ≤ 0.2; -0.2 ≤ T3 ≤ 0.2; -0.2 ≤ T4 ≤ 0.2; -0.08 ≤ T1 + T2 + T3 + T4 ≤ 0.08; Double-click on the main interface to enter the alignment interface. After installing the standard part on the replaceable measuring tool, pull the control valve handle to push the measuring plate to the working position, click on alignment, complete the alignment and save the data; then pull the control valve handle back again to retract the measuring plate. Among them, when pulling the control valve handle, the air flow passes through the large air pipe and the small air pipe and flows to the rear chamber of the pneumatic slide cylinder, pushing the workbench forward, and then带动 the connecting plate, linear guide, displacement sensor, measuring part, etc. to move forward together. Since the pushing force of the measuring plate on the four measuring rods of the measuring tool overcomes the spring force built into the measuring rods, the measuring rods come into contact with the measured alignment part. When the four measuring rods come into contact with the measured alignment part, the measuring plate will stop moving forward, but the workbench of the pneumatic slide will continue to push the displacement sensor forward for a certain distance. At this time, the elastic part begins to enter the compressed state; when the workbench of the pneumatic slide reaches the maximum stroke, the measuring part, elastic part, and displacement sensor are all in a stationary state. At this time, the positions of the 4 displacement sensor probes are the data detected and collected by the system; alignment is based on the dimensions of the standard part. When the displacement sensor contacts the standard part, this standard position is fixed and the reading is set to 0. The offset value of the measured part relative to the standard part during subsequent inspections is the measured value. S4. Install the blade to be measured for inspection; Specifically, return to the main interface, double-click on "Start Inspection" or press the shortcut key F6 to enter the inspection interface and start the inspection. The measured value reading is calculated by the formula D = FX(KX―X 对 ) where D is the measured value reading; FX is the direction of the measured dimension, that is, the positive and negative values; K is the calibration coefficient of the displacement sensor; X is the actual displacement value of the displacement sensor; X 对 is the displacement value of the sensor when the alignment is set to zero; enter the part number in the inspection interface, install the blade with the corresponding number on the replaceable measuring tool, fix the blade with one hand and pull the control valve handle with the other hand to perform the inspection. The mechanical inspection action is the same as that for inspecting the alignment part in step 4; after the inspection reading is stable, press the shortcut key F5 to save the data, and the number will automatically jump to the next number to achieve continuous inspection.

[0038] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A blade equivalent detection data acquisition device, characterized in that, The data acquisition device includes: The measuring tool has a mounting cavity that matches the blade to be measured; A measuring platform (1) is used as a structural support, and a positioning part (3) for mounting measuring instruments is provided in the middle of the measuring platform (1); A displacement detection component is set on the measurement platform (1) in a number matching the number of measurement positions of the blade to be measured; A moving mechanism is provided on the measuring platform (1) to drive the displacement detection component to move toward or away from the measuring tool, thereby enabling the displacement detection component to acquire the position data of the measuring point of the blade to be measured. A data processing device, electrically connected to the displacement detection component, is used to receive the position data of the measurement points collected by the displacement detection component and calculate the equivalent value.

2. The blade equivalent detection data acquisition device according to claim 1, characterized in that, The measuring instrument has measuring channels on both sides that are matched to the position to be measured, for passing through measuring rods. The measuring channels are provided with measuring rods for contacting the measuring position of the blade to be measured. The two ends of the measuring channels are respectively connected to the outer wall of the measuring instrument and the mounting cavity. The displacement detection assembly includes a displacement detection unit (18) for electrically connecting to the measuring rod. The displacement detection unit (18) is disposed in the moving mechanism.

3. The blade equivalent detection data acquisition device according to claim 2, characterized in that, The displacement detection assembly includes a measuring element (12) disposed on the moving mechanism and arranged between the displacement detection unit (18) and the measuring rod, wherein the measuring element (12) is disposed on the moving mechanism.

4. The blade equivalent detection data acquisition device according to claim 3, characterized in that, The moving mechanism includes a linear actuator (21) located on one side of the positioning part (3) on the measuring platform (1) and a sliding mechanism (15) on the linear actuator (21). The number of sliding mechanisms (15) matches the number of measuring channels on the corresponding side of the measuring instrument. The measuring element (12) is disposed on the sliding mechanism (15). A damping structure is provided between the measuring element (12) and the fixed part of the sliding mechanism (15), or a damping structure is provided between the measuring element (12) and the linear actuator (21).

5. The blade equivalent detection data acquisition device according to claim 4, characterized in that, The linear actuator (21) is a pneumatic slide. A pneumatic slide is provided on each side of the positioning part (3). A control valve (6) connected to the air source is provided on the measuring platform (1). The control valve (6) is connected to the air inlet and air outlet of each linear actuator (21). The control valve (6) is used to synchronously control the movement of each pneumatic slide.

6. The blade equivalent detection data acquisition device according to any one of claims 4, characterized in that, The damping structure includes an elastic element (11) and an adjusting element (10) for adjusting the position of the elastic element (11).

7. The blade equivalent detection data acquisition device according to any one of claims 3-6, characterized in that, The measuring element (12) has a mating end face facing the measuring rod and a mating end facing the displacement detection unit (18). The mating end face is connected to the measuring rod or abuts against the measuring rod to match the position of the measuring channel of different measuring instruments.

8. The blade equivalent detection data acquisition device according to claim 1, characterized in that, The positioning part (3) is provided with a first positioning pin (4), a second positioning pin (22) and a third positioning pin (23). The first positioning pin (4) is used to cooperate with the first side of the measuring tool for positioning. The second positioning pin (22) and the third positioning pin (23) are respectively cooperated with the second side of the measuring tool for positioning. The first side and the second side are adjacent surfaces.

9. The blade equivalent detection data acquisition device according to claim 1, characterized in that, The data processing device includes a multi-channel displacement display, comprising a housing, a display module, a power module, and a motherboard equipped with an equivalent measurement program.

10. A method for acquiring leaf equivalent detection data, characterized in that, The blade equivalent detection data acquisition device according to any one of claims 1-9, wherein the blade equivalent detection data acquisition method comprises: S1. Preparation for testing; S2. Position and clamp the measuring tool at the positioning part; S3. Install the standard parts for calibration, and remove the standard parts after calibration; S4. Install the blade to be tested for inspection.

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