A blade deformation measurement device

Abstract

The present invention relates to a blade deformation measuring device, which includes a carrier, two support seats, a clamping and locking mechanism, and multiple pairs of rod-shaped displacement sensors. The two support seats are installed at the upper end of the carrier at a left-right interval. A first positioning portion for positioning the blade tenon is provided at the upper end of one of the support seats, and a second positioning portion for positioning the blade shroud is provided at the upper end of the other support seat. The clamping and locking mechanism is arranged on the front side of the two support seats and installed on the carrier for clamping a horizontally placed blade on the blade tenon positioning portion and the blade shroud positioning portion. After the blade is clamped, its blade front faces forward. The multiple pairs of displacement sensors are respectively installed above the carrier through brackets. The multiple pairs of displacement sensors are distributed at intervals in the left-right direction between the two support seats. Each pair of displacement sensors has two sensors distributed vertically, and the long axes of the two sensors are located in the same plane. Advantages: The structure is reasonably designed, and the deformation measurement result of the blade is quantified objectively.

Description

Technical Field

[0001] The present invention relates to the technical field of deformation measurement, and particularly relates to a blade deformation measurement device. Background Art

[0002] Currently, the existing low-pressure turbine working blades of engines on the market, as Figure 1 shown, are produced by using a directional solidification casting process, and their structures are divided into blade bodies, blade crowns, and tenons, etc. The blade body is a slender solid structure, and after undergoing thermal cycling or external force, it is prone to deformation. After deformation, its cross-section exceeds the tolerance range of the design requirements, resulting in the profile dimensions not meeting the design requirements. Therefore, after casting or repair, it is necessary to correct its cross-section to make the cross-sectional contour dimensions meet the design requirements.

[0003] In the correction operation of the blade, it is first necessary to solve the measurement of the blade profile, and then the controllable correction of the blade cross-section can be realized according to the measurement results. The existing blade profile measurement mainly uses a special measurement and positioning tooling to position the blade, measures the specified cross-section of the blade body with a template, and manually judges whether the cross-section needs to be corrected through the light transmission amount of the template. For the cross-section that needs to be corrected, the operator judges whether it is necessary to perform a bending or twisting operation. The advantages of this measurement method are simple and easy to implement, and low cost; the disadvantages are that it seriously depends on the operator's level and experience, and in addition, the measurement results are difficult to quantify, and the correction amount and correction direction completely depend on the operator's experience and level, judged by the operator independently, and the key process parameters in the correction process are uncontrollable. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a blade deformation measurement device, which effectively overcomes the defects of the prior art.

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

[0006] A blade deformation measuring device includes a carrier, two support seats, a clamping and locking mechanism, and multiple pairs of rod-shaped displacement sensors. The two support seats are installed at the upper end of the carrier at left and right intervals. A first positioning portion for positioning the blade tenon is provided at the upper end of one of the support seats, and a second positioning portion for positioning the blade crown is provided at the upper end of the other support seat. The clamping and locking mechanism is arranged on the front side of the two support seats and installed on the carrier for clamping a horizontally placed blade on the first positioning portion and the second positioning portion. When the blade is clamped, its front side faces forward. Multiple pairs of the displacement sensors are respectively installed above the carrier through brackets. The multiple pairs of displacement sensors are spaced at intervals in the left-right direction between the two support seats. Each pair of the displacement sensors has two arranged vertically, and the long axes of the two are in the same plane. The two displacement sensors in each pair are respectively used for vertically contacting the corresponding parts above and below the back of the blade.

[0007] On the basis of the above technical solution, the present invention can be further improved as follows.

[0008] Further, a first support block inclined upward toward the rear side is provided at the upper end of one of the support seats. At least one tenon positioning cone is detachably installed on the front side of the first support block. A tenon support block is detachably installed at the front part of the upper end of one of the support seats. The tenon positioning cone is used to abut against the rear side of the blade tenon, and the tenon support block is used to abut against the lower part of the front side of the blade tenon. The first support block, the tenon positioning cone, and the tenon support block together constitute the first positioning portion.

[0009] Further, a second support block is provided at the upper end of the other support seat. A crown support block is detachably installed at the front part of the upper end of the support seat. An installation block is provided at the rear end of the side of the second support block close to the first support block. A blade back support block for abutting against the back of the blade is detachably installed on the installation block. A horizontal positioning cone for abutting against the side end of the blade crown is detachably installed on the side of the installation block facing away from the first support block. The second support block, the crown support block, the blade back support block, and the horizontal positioning cone together constitute the second positioning portion.

[0010] Further, the tenon positioning cone, the tenon support block, the crown support block, the horizontal positioning cone, and the blade are all conductive components. The tenon positioning cone, the tenon support block, the crown support block, and the horizontal positioning cone are respectively connected to the blade through wires. The blade is connected to the positive or negative pole of the power supply. A light indicator is respectively connected in series with the tenon positioning cone, the tenon support block, the crown support block, and the horizontal positioning cone through wires one by one, and the respective series-connected circuits are connected to the negative or positive pole of the power supply.

[0011] Further, the clamping and locking mechanism includes a support platform, a telescopic driving device, and a clamping block. The support platform is installed at the upper end of the carrier, the telescopic driving device is installed at the upper end of the support platform with its telescopic end facing backward, the clamping block is connected to the telescopic end of the telescopic driving device, locking blocks extending backward are respectively provided at the left and right ends of the upper end of the clamping block, and the two locking blocks respectively correspond to the first support block and the second support block one by one. The telescopic driving device is used to drive the clamping block to drive the two locking blocks to move back and forth, so that the two locking blocks respectively clamp and position the tenon and crown of the blade in front of the first support block and the second support block.

[0012] Further, the telescopic driving device is a cylinder.

[0013] Further, a first fixing block is provided between the two support seats, and a second fixing block is provided at the rear side of the two. A plurality of first mounting brackets distributed in the left-right direction are installed at the upper end of the first fixing block, and a plurality of second mounting brackets distributed in the left-right direction are installed at the upper end of the second fixing block. Pairs of the displacement sensors respectively correspond to the plurality of first mounting brackets and the plurality of second mounting brackets one by one. Moreover, the two displacement sensors of each pair are respectively installed on the corresponding first mounting bracket and second mounting bracket, and the displacement sensor installed on the first mounting bracket is inclined upward from back to front and is used to vertically contact the corresponding part above the back of the blade, and the displacement sensor installed on the second mounting bracket is inclined upward from back to front and is used to vertically contact the corresponding part below the back of the blade.

[0014] Further, the carrier is a flat plate member, and anti-slip feet are provided around its bottom.

[0015] The beneficial effects of the present invention are as follows: The structure is reasonably designed, the deformation measurement result of the blade is objectively quantified, and the drawback that the traditional measurement technology requires manual judgment based on experience is improved. Description of the Drawings

[0016] Figure 1 is a three-dimensional view of a standard blade related to the blade deformation measurement device of the present invention;

[0017] Figure 2 is a three-dimensional view of the blade deformation measurement device of the present invention;

[0018] Figure 3 is a three-dimensional view of another perspective of the blade deformation measurement device of the present invention;

[0019] Figure 4 is a top view of the blade deformation measurement device of the present invention;

[0020] Figure 5 isFigure 4 Cross-sectional view at the D-D section line in the middle;

[0021] Figure 6 is Figure 5 Partial view of part E in the middle;

[0022] Figure 7 Structural explosion view of the blade deformation measuring device of the present invention;

[0023] Figure 8 is Figure 7 Partial view of part G in the middle;

[0024] Figure 9 Circuit connection block diagram involved in the blade deformation measuring device of the present invention.

[0025] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0026] 1. Carrier; 2. Support base; 3. Clamping and locking mechanism; 4. Displacement sensor; 21. First support block; 22. Second support block; 31. Support table; 32. Telescopic driving device; 33. Clamping block; 34. Locking block; 211. Tenon positioning cone; 212. Tenon support block; 221. Blade crown support block; 222. Mounting block; 223. Blade back support block; 224. Horizontal positioning cone. Detailed implementation manners

[0027] The principles and features of the present invention will be described below with reference to the attached drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0028] Embodiment: As Figures 2 to 8 shown, the blade deformation measuring device of this embodiment includes a carrier 1, two support bases 2, a clamping and locking mechanism 3, and multiple pairs of rod-shaped displacement sensors 4. The two support bases 2 are installed at the upper end of the carrier 1 at intervals left and right. A first positioning portion for positioning the tenon of the blade (designated as M in the figure, Figure 6 , Figure 9 in the middle) is provided at the upper end of one of the support bases 2, and a second positioning portion for positioning the blade crown is provided at the upper end of the other support base 2. The clamping and locking mechanism 3 is arranged on the front side of the two support bases 2 and installed on the carrier 1 for clamping the horizontally placed blade on the first positioning portion and the second positioning portion. When the blade is clamped, its front side faces forward. Multiple pairs of the displacement sensors 4 are respectively installed above the carrier 1 through brackets. Multiple pairs of the displacement sensors 4 are distributed at intervals in the left-right direction between the two support bases 2. Each pair of the displacement sensors 4 has two arranged vertically, and the long axes of the two are in the same plane. The two displacement sensors 4 in each pair are respectively used to vertically contact the corresponding parts above and below the back of the blade.

[0029] The usage process is as follows:

[0030] In the present invention, first, a standard blade is placed on the first positioning portion and the second positioning portion at the upper ends of two support seats 2. Then, the tenon (designated as a in the figure) and the shroud (designated as b in the figure) of the standard blade are clamped and positioned with the first positioning portion and the second positioning portion through the clamping and locking mechanism 3. After that, the central axes of the two displacement sensors 4 in each pair of multiple pairs of displacement sensors 4 are made perpendicular to the back of the blade body of the standard blade (designated as c in the figure). First, the measured values of each pair of displacement sensors 4 after the standard blade is assembled are measured. Then, the standard blade is removed, and the blade to be measured (already deformed) is assembled in the same assembly manner as the standard blade. When measuring the torsional amount of the blade to be measured, the displacement value of any cross-section where the central axis of a pair of displacement sensors 4 is located relative to the standard blade along a certain direction can be measured. Through geometric relationships, the rotation angle of the measured cross-section can be obtained. By comparing this angle with the design model, the torsional angle of the measured cross-section can be obtained, that is, the torsional amount and the torsional direction of the measured cross-section are obtained. When measuring the bending amount, in the case of small deformation, the bending deformation is the deflection of the centroid of the measured surface, and the direction is in the plane with the torque direction as the normal. At the same time, the deformation of the plane can be decomposed into rotation and translation. The bending deformation amount is to measure the translational displacement value of the cross-section of the blade to be measured relative to the standard blade. This embodiment can quantify the measurement result of the blade profile into the torsional amount and the bending amount, and the measurement result is objectively quantified without relying on the operator's experience level.

[0031] It should be added that: multiple pairs of displacement sensors 4 are respectively connected to the computer mainframe, and the data is directly transmitted to the computer mainframe for calculation in the computer mainframe.

[0032] As a preferred embodiment, a first support block 21 inclined upward toward the rear side is provided at the upper end of one of the above-mentioned support seats 2. At least one tenon positioning cone 211 is detachably installed on the front side of the first support block 21. A tenon support block 212 is detachably installed at the front part of the upper end of one of the above-mentioned support seats 2. The above-mentioned tenon positioning cone 211 is used to abut against the rear side of the tenon of the blade, and the above-mentioned tenon support block 212 is used to abut against the lower part of the front side of the tenon of the blade. The above-mentioned first support block 21, tenon positioning cone 211 and tenon support block 212 together constitute the above-mentioned first positioning portion.

[0033] In the above-mentioned implementation scheme, when the blade is installed, the blade is horizontally placed left and right, and one side of its tenon (the rear side in the current state) abuts against the tenon positioning cone 211. Its lower end is located in the area between the tenon support block 212 and the first support block 21. And, the front part of the lower end of the tenon abuts against the tenon support block 212. Overall, the tenon is in a state of tilting backward, and its tilting angle is the same as the tilting angle of the first support block 21. Then, under the action of the clamping and locking mechanism 3, the tenon can be clamped and positioned.

[0034] In this embodiment, two tenon positioning cones 211 are preferably provided, which are distributed on the front side of the first support block 21 with an interval up and down.

[0035] As a preferred embodiment, another upper end of the above-mentioned support seat 2 is provided with a second support block 22, and the front part of the upper end of the support seat 2 is detachably equipped with a leaf crown support block 221, and the rear end of the second support block 22 close to the first support block 21 is provided with a mounting block 222, and the mounting block 222 is detachably equipped with a leaf back support block 223 for abutting against the back of the blade, and the side of the mounting block 222 away from the first support block 21 is detachably equipped with a horizontal positioning cone 224 for abutting against the side end of the blade leaf crown, and the second support block 22, the leaf crown support block 221, the leaf back support block 223 and the horizontal positioning cone 224 together constitute the above-mentioned second positioning portion.

[0036] In the above embodiment, when the blade is installed, the blade itself is placed horizontally left to right, and the rear side of the blade crown is against the front side of the second support block 22. At the same time, the back of the blade is against the blade back support block 223. At the same time, the lower end of the blade crown is located between the blade crown support block 221 and the second support block 22, the front part of the lower end of the blade crown is against the blade crown support block 221, and the horizontal positioning cone 224 is against the side end of the blade crown, and then the clamping of the clamping locking mechanism 3 is cooperated to clamp and fix the blade crown.

[0037] As a preferred embodiment, Figure 9 As shown, the tenon positioning cone 211, the tenon support block 212, the leaf crown support block 221, the horizontal positioning cone 224 and the blade are all conductive components, and the tenon positioning cone 211, the tenon support block 212, the leaf crown support block 221 and the horizontal positioning cone 224 are respectively connected to the blade through a wire, and the blade is connected to the positive or negative pole of the power supply. The tenon positioning cone 211, the tenon support block 212, the leaf crown support block 221 and the horizontal positioning cone 224 are respectively connected in series with an indicator light (indicated by L in the figure) through a wire, and each series circuit is respectively connected to the negative or positive pole of the power supply.

[0038] In the above embodiments, since the tenon positioning cone 211, the tenon support block 212, the shroud support block 221, the horizontal positioning cone 224, and the blade are all conductive components, when the blade is clamped and fixed, if the tenon positioning cone 211, the tenon support block 212, the shroud support block 221, and the horizontal positioning cone 224 are in good connection with the corresponding parts of the blade respectively, the indicator light will light up (the circuit is connected). If any one or more of the indicator lights in series with the tenon positioning cone 211, the tenon support block 212, the shroud support block 221, and the horizontal positioning cone 224 do not light up, it means that the corresponding parts of the blade are not positioned properly, that is, the blade as a whole is not clamped and positioned well. At this time, according to the lighting situation of the indicator lights, adjust the clamping and positioning of the blade. After all the indicator lights are turned on, it means that the blade has been clamped and positioned well, and then proceed to the next measurement work to ensure the accuracy of the subsequent measurement results.

[0039] In this embodiment, the tenon positioning cone 211, the tenon support block 212, the shroud support block 221, and the horizontal positioning cone 224 are all detachably connected and need to be replaced in time after wear to not affect the measurement accuracy.

[0040] As a preferred embodiment, the above clamping and locking mechanism 3 includes a support table 31, a telescopic driving device 32, and a clamping block 33. The above support table 31 is installed at the upper end of the above carrier 1, the above telescopic driving device 32 is installed at the upper end of the above support table 31, and its telescopic end faces backward. The above clamping block 33 is connected to the telescopic end of the above telescopic driving device 32. At the left and right ends of the upper end of the above clamping block 33, locking blocks 34 extending backward are respectively provided. The two above locking blocks 34 respectively correspond to the above first support block 21 and the second support block 22. The above telescopic driving device 32 is used to drive the above clamping block 33 to drive the two locking blocks 34 to move back and forth, so that the two above locking blocks 34 respectively clamp and position the tenon and the shroud of the blade on the front side of the above first support block 21 and the second support block 22.

[0041] In the above embodiments, after the blade is placed on the first positioning part and the second positioning part at the upper ends of the two support seats 2, the telescopic driving device 32 extends, driving the clamping block 33 to move horizontally backward, so that the locking blocks 34 at both ends of the clamping block 33 move backward to contact the front sides of the tenon and the shroud of the blade, and clamp the tenon and the shroud between the two locking blocks 34 and the first support block 21 and the second support block 22. After the measurement is completed, the telescopic driving device 32 contracts, so that the locking blocks 34 release the locking of the tenon and the shroud, and the blade can be removed.

[0042] In this embodiment, the above telescopic driving device 32 uses a conventional cylinder.

[0043] As a preferred embodiment, a first fixing block is provided between the two support seats 2 described above, and a second fixing block is provided at the rear side of the two support seats 2. A plurality of first mounting brackets distributed in the left-right direction are installed at the upper end of the first fixing block, and a plurality of second mounting brackets distributed in the left-right direction are installed at the upper end of the second fixing block. A plurality of pairs of the displacement sensors 4 respectively correspond to the plurality of first mounting brackets and the plurality of second mounting brackets one by one. Moreover, the two displacement sensors 4 of each pair are respectively installed on the corresponding first mounting bracket and second mounting bracket, and the displacement sensor 4 installed on the first mounting bracket is inclined upward from back to front and is used to vertically contact the corresponding upper part on the back of the blade, and the displacement sensor 4 installed on the second mounting bracket is inclined upward from back to front and is used to vertically contact the corresponding lower part on the back of the blade.

[0044] In the above embodiment, the first mounting bracket is a strip-shaped block, and its rear end extends obliquely upward to the rear upper side. The corresponding displacement sensor 4 is installed in the mounting hole at the obliquely upward extending part of the first mounting bracket. The second mounting bracket is also strip-shaped, and its front end extends obliquely upward to the front upper side. The corresponding displacement sensor 4 is installed in the mounting hole at the obliquely upward extending part of the second mounting bracket. Both the first mounting bracket and the second mounting bracket can be disassembled and assembled, which is convenient for the adjustment, quick disassembly and assembly of the displacement sensor 4.

[0045] In this embodiment, the carrier 1 is a flat plate member, and anti-slip feet are provided around the bottom of the carrier 1. Of course, traveling wheels can also be provided at the bottom of the carrier 1.

[0046] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blade deformation measurement device, characterized in that: It includes a carrier (1), two support seats (2), a clamping and locking mechanism (3), and multiple pairs of rod-shaped displacement sensors (4). The two support seats (2) are installed at the upper end of the carrier (1) at intervals left and right. A first positioning portion for positioning the blade tenon is provided at the upper end of one of the support seats (2), and a second positioning portion for positioning the blade shroud is provided at the upper end of the other support seat (2). The clamping and locking mechanism (3) is arranged on the front side of the two support seats (2) and installed on the carrier (1) to clamp the horizontally placed blade on the first positioning portion and the second positioning portion. When the blade is clamped, its blade front faces forward. Multiple pairs of the displacement sensors (4) are respectively installed above the carrier (1) through brackets. The multiple pairs of the displacement sensors (4) are distributed at intervals in the left-right direction between the two support seats (2). Each pair of the displacement sensors (4) has two arranged vertically, and the long axes of the two are in the same plane. The two displacement sensors (4) in each pair are respectively used for vertically contacting the corresponding parts above and below the back of the blade; a first support block (21) inclined upward toward the rear side is provided at the upper end of one of the support seats (2), and at least one tenon positioning cone (211) is detachably installed on the front side of the first support block (21). A tenon support block (212) is detachably installed at the front part of the upper end of one of the support seats (2). The tenon positioning cone (211) is used to abut against the rear side of the blade tenon, and the tenon support block (212) is used to abut against the lower part of the front side of the blade tenon. The first support block (21), the tenon positioning cone (211), and the tenon support block (212) together constitute the first positioning portion; a second support block (22) is provided at the upper end of the other support seat (2), and a shroud support block (221) is detachably installed at the front part of the upper end of this support seat (2). An installation block (222) is provided at the rear end of the side of the second support block (22) close to the first support block (21), and a blade back support block (223) for abutting against the back of the blade is detachably installed on the installation block (222). A horizontal positioning cone (224) for abutting against the side end of the blade shroud is detachably installed on the side of the installation block (222) facing away from the first support block (21). The second support block (22), the shroud support block (221), the blade back support block (223), and the horizontal positioning cone (224) together constitute the second positioning portion;The tenon positioning cone (211), tenon support block (212), shroud support block (221), horizontal positioning cone (224) and the blade are all conductive components. The tenon positioning cone (211), tenon support block (212), shroud support block (221) and horizontal positioning cone (224) are respectively connected to the blade through wires. The blade is connected to the positive or negative pole of the power supply. The tenon positioning cone (211), tenon support block (212), shroud support block (221) and horizontal positioning cone (224) are respectively connected in series with an indicator light through wires in one-to-one correspondence, and the respective series circuits are connected to the negative or positive pole of the power supply.; 2. The blade deformation measurement device according to claim 1, characterized in that: The clamping and locking mechanism (3) includes a support platform (31), a telescopic driving device (32), and a clamping block (33). The support platform (31) is installed at the upper end of the carrier (1). The telescopic driving device (32) is installed at the upper end of the support platform (31), and its telescopic end faces backward. The clamping block (33) is connected to the telescopic end of the telescopic driving device (32). At the left and right ends of the upper end of the clamping block (33), locking blocks (34) extending backward are respectively provided. The two locking blocks (34) respectively correspond to the first support block (21) and the second support block (22). The telescopic driving device (32) is used to drive the clamping block (33) to drive the two locking blocks (34) to move back and forth, so that the two locking blocks (34) respectively clamp and position the tenon and shroud of the blade on the front sides of the first support block (21) and the second support block (22).

3. A blade deformation measurement device according to claim 2, characterized in that: The telescopic driving device (32) is a cylinder.

4. A blade deformation measuring device according to claim 1, characterized in that: A first fixing block is provided between the two support seats (2), and a second fixing block is provided at the rear side of the two support seats (2). A plurality of first mounting brackets distributed in the left-right direction are installed at the upper end of the first fixing block, and a plurality of second mounting brackets distributed in the left-right direction are installed at the upper end of the second fixing block. Multiple pairs of displacement sensors (4) respectively correspond to the multiple first mounting brackets and the multiple second mounting brackets. Moreover, the two displacement sensors (4) of each pair are respectively installed on the corresponding first mounting bracket and second mounting bracket. The displacement sensor (4) installed on the first mounting bracket is inclined upward from back to front and is used to vertically contact the corresponding part above the back of the blade. The displacement sensor (4) installed on the second mounting bracket is inclined upward from back to front and is used to vertically contact the corresponding part below the back of the blade.

5. A blade deformation measurement device according to any one of claims 1 to 4, characterized in that: The carrier (1) is a flat plate member, and anti-slip feet are provided around its bottom.

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