A high-precision turbine disc mortise gauge bar distance detection device and method

Abstract

The present application relates to the technical field of aero-engine, in particular to a high-precision turbine disc mortise and tenon groove gauge bar distance detection device and method. The high-precision turbine disc mortise and tenon groove gauge bar distance detection device comprises a mortise and tenon groove gauge bar distance measuring tool body, a transmission rod, a surface pressure block, a spring, a micrometer, a detection lever, a conical expansion block, a spherical measuring slide head and a guide block. The high-precision turbine disc mortise and tenon groove gauge bar distance detection method is to obtain the actual measurement value of the turbine disc mortise and tenon groove gauge bar distance by detecting the turbine disc mortise and tenon groove and the standard part respectively. Compared with the prior art, the present application uses the slider conical expansion and lever principle to design a special mortise and tenon groove gauge bar distance detection device, and a spherical probe is used to simulate the gauge bar. Then a standard part is designed, and the principle of comprehensive difference comparison detection is used to realize the rapid and high-precision detection of the mortise and tenon groove gauge bar distance.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, specifically to a high-precision detection device and method for turbine disk tenon groove gauge spacing. Background Technology

[0002] The space between gauge rods in common turbine disk fir tree-shaped tenons is narrow. Measurements are typically taken using a combination of gauge rods and flat plug gauges, but this method cannot determine if the gauge rod spacing is within acceptable limits, nor can the measured value be directly read. Another approach involves repeatedly attempting to measure approximate values ​​using gauge rods and assembled gauge blocks, but this method is complex, inaccurate, and inefficient, hindering the rapid measurement of multiple tenons. Furthermore, conventional methods cannot accurately measure the gauge rod spacing of multiple cross-sections of tenons along their thickness direction, posing a technical bottleneck for analyzing the tensile deformation mechanism of tenons. Therefore, the development of new testing devices is necessary. Summary of the Invention

[0003] Purpose of the invention: To solve the above problems, the present invention provides a high-precision detection device and method for turbine disk tenon groove gauge rod distance, which realizes rapid, high-precision and stable detection of turbine disk tenon groove gauge rod distance, can measure the measured value of tenon groove gauge rod distance of multiple sections in the thickness direction of the tenon groove, and facilitates the study of the tenon groove broaching deformation mechanism.

[0004] Technical Solution: To achieve the above objectives, the high-precision detection device for the tenon and groove gauge distance of the turbine disk of the present invention includes a tenon and groove gauge body, a detection lever, a vertically arranged transmission rod, a pressure gauge block located at the upper end of the transmission rod, a spring located below the pressure gauge block, a dial indicator fixed on the tenon and groove gauge body, a conical expansion block sleeved on the lower part of the transmission rod, spherical measuring slides located on both sides of the conical expansion block, and a guide block placed on the spherical measuring slides; the transmission rod is in contact with one end of the detection lever; the outer conical surfaces on both sides of the conical expansion block are in contact with the inner surfaces of the spherical measuring slides on both sides, the outer conical surfaces on both sides of the conical expansion block are sloping surfaces that are narrower at the top and wider at the bottom, and the conical expansion block and the transmission rod are always relatively stationary;

[0005] When the transmission rod is pressed down, one end of the detection lever moves downward and the other end moves upward, acting on the dial indicator. The conical expansion block and the transmission rod remain relatively stationary. The downward movement of the conical expansion block causes it to separate from the contact surface of the spherical measuring slide. Under the action of external force, the spherical measuring slide can retract inward relative to the conical expansion block along the guide block.

[0006] When checking the lever balance, the dial indicator pointer returns to zero; when checking the lever tilt, the dial indicator displays a non-zero value.

[0007] Furthermore, the object detected by the device is the turbine disk tenon groove.

[0008] Furthermore, the transmission rod is provided with a limiting groove, and one end of the detection lever moves within the range of the limiting groove.

[0009] Furthermore, the outer cone angle d of the conical expansion block is 63.4°.

[0010] Furthermore, the conical expansion block is located between the two spherical measuring slides.

[0011] Furthermore, there are two guide blocks and two spherical measuring sliders, both arranged symmetrically about the transmission rod.

[0012] Furthermore, the device profile fits the turbine disk tenon groove profile, the device profile has two circular holes of the same size as the spherical measuring slide head, and the device profile is made of rigid material.

[0013] Furthermore, the standard part of the table is a regular-shaped tenon and groove.

[0014] The high-precision detection method for the tenon groove distance of the turbine disk described in this invention includes the following steps: 1) Zeroing the dial indicator using a standard reference component, including: first pressing down the dial indicator pressure block to cause the transmission rod to move the conical expansion block downwards simultaneously, thus separating the outer conical surface of the conical expansion block from the contact surface of the spherical measuring slide; then releasing the dial indicator pressure block, and through the spring reset action, causing the conical expansion block to rise until the outer conical surface of the conical expansion block is in contact with the inner surface of the spherical measuring slide, thus causing the spherical measuring slide to expand outwards until the outer end of the spherical measuring slide contacts the inner surface of the standard reference component; then... Place the dial indicator in the tenon groove measuring rod distance measuring body, and at the same time make the extension rod below the dial indicator contact one end of the detection lever. Then, move the other end of the detection lever upward to the upper end of the limit groove of the transmission rod and stop moving. At this time, the dial indicator pointer stops rotating and the dial indicator stops rotating downward. When the spherical measuring slide contacts the inner side of the standard part of the dial indicator, the spherical measuring slide stops expanding outward and the conical expansion block stops moving upward. The transmission rod stops moving upward and reacts on the detection lever. The detection lever is in a balanced state. At this time, the dial indicator dial reading is zero.

[0015] 2) Measure the turbine disk tenon groove and record the dial indicator reading;

[0016] 3) The measured value of the turbine disk tenon groove gauge bar distance is obtained by calculation formula; the calculation formula is: measured value of turbine disk tenon groove gauge bar distance = measured value of gauge bar distance of standard part + / - dial indicator reading - twice the measured value of gauge bar diameter.

[0017] Furthermore, the parameters of the standard parts are as follows: the bottom width f of the tenon groove is the sum of the minimum theoretical value of the tenon groove gauge bar distance and twice the theoretical value of the gauge bar diameter minus 0.2; the height e of the tenon groove is the distance from the outer circle of the turbine disk to the bottom of the tenon groove.

[0018] Beneficial effects: By installing a dial indicator and matching it with a dedicated standard matching part, the distance between the tenon and groove of the turbine disk can be measured after the dial is zeroed. The measured value of the distance between the tenon and groove of the turbine disk can be realized by reading the dial indicator value. At the same time, the device's surface fits the surface of the tenon and groove of the turbine disk, ensuring simple operation, high testing efficiency, high accuracy, and stability. By sliding this dedicated testing device along the thickness direction of the tenon and groove, the measured value of the distance between the tenon and groove of multiple sections can be quickly realized, which also facilitates the study of the mechanism of tenon and groove broaching deformation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the device described in this invention.

[0020] Figure 2 This is an enlarged schematic diagram of a partial structure (I) of the device described in this invention.

[0021] Figure 3 This is an enlarged schematic diagram of a partial II structure of the device described in this invention.

[0022] Figure 4 This is a cross-sectional schematic diagram of the conical expansion block of the device described in this invention.

[0023] Figure 5 This is a schematic diagram of the structure of the device described in this invention for measuring the mortise and tenon joint of a turbine disk.

[0024] Figure 6 This is a schematic diagram of the structure of the device described in this invention for measuring standard parts.

[0025] Figure 7 This is a schematic diagram of the structure of the standard part of the table described in this invention.

[0026] Figure 8 This is a schematic diagram of the turbine disk tenon groove measuring rod and measuring rod spacing structure described in this invention. Detailed Implementation

[0027] This invention discloses a high-precision detection device and method for the tenon groove spacing of a turbine disk. Please refer to [link / reference]. Figures 1 to 8As shown below, the high-precision detection device for turbine disk tenon and groove gauge distance provided by the present invention will be further described in detail: The high-precision detection device for turbine disk tenon and groove gauge distance includes a vertically arranged transmission rod 1, a locking screw 2, a tenon and groove gauge distance measuring instrument body 8, a detection lever 9, a gauge pressure block 4 located at the upper end of the transmission rod 1, a spring 3 located below the gauge pressure block 4, a dial indicator 5 fixed to the tenon and groove gauge distance measuring instrument body 8, a gauge clamp nut 6, a gauge clamp screw sleeve 7, a conical expansion block 14 sleeved on the lower part of the transmission rod 1, and a stop block 12. The system includes a spherical measuring slide head 13 on both sides of the conical expansion block 14, a guide block 10 on the spherical measuring slide head 13, a fulcrum pin 11, and a washer 15; wherein, the transmission rod 1 is provided with a limiting groove 18, and one end of the detection lever 9 moves within the range of the limiting groove 9; a stop block 12 is provided on both sides of the guide block 10, and the detection lever 9 has an equal arm structure, i.e., a=b, and is installed with the fulcrum pin 11 through the washer 15, so that the displacement of the transmission rod 1 is consistent with that of the detection lever 9, thereby ensuring consistency with the change value of the dial indicator 5; Figure 4 As shown, the outer cone angle d of the conical expansion block 14 is 63.4°, so that the displacement of the transmission rod 1 is consistent with the displacement of the guide block 10. This makes it easy to directly read the dial indicator 5 to obtain the measured difference between the gauge bar distance of the turbine disk tenon groove 17 and the gauge bar distance of the standard part 16, thus obtaining the measured value of the gauge bar distance of the turbine disk tenon groove. The guide block 10 and the spherical measuring slide head 13 are both provided in twos with the transmission rod 1 as the axis of symmetry. The distance c from the center of the spherical measuring slide head 13 to the bottom is the distance from the bottom of the turbine disk tenon groove to the transverse axis of the gauge bar. The object of the device is the turbine disk tenon groove 17. First, based on the size of the tenon and groove gauge rod distance of the turbine disk, select the corresponding dedicated tenon and groove gauge rod distance measuring instrument body 8 and dedicated dial indicator standard part 16; screw the dial indicator 5 into the gauge clamp sleeve 7 through the thread on the gauge clamp nut 6 and install it on the tenon and groove gauge rod distance measuring instrument body 8; the spherical measuring slide head 13 and the tenon and groove gauge rod distance measuring instrument body 8 are provided with guide block grooves, and the guide block 10 is installed in the guide block groove, so that the spherical measuring slide head 13 can slide along the guide block groove under external force, while the guide block 10 retracts inward; the device surface fits the turbine disk tenon and groove surface, avoiding detection instability caused by excessive swing amplitude of the device operation, and at the same time, the device surface has two circular holes of the same size as the spherical measuring slide head 13 in the horizontal direction where the two spherical measuring slide heads are located, which facilitates the outward expansion and movement of the spherical measuring slide head 13. The device surface is made of rigid material.

[0028] The high-precision detection method for turbine disk tenon groove gauge rod spacing provided by the present invention will be further described in detail below: First, the detection object is the dial indicator standard 16. First, press down the dial indicator pressure block 4, and at the same time, compress the spring 3. The transmission rod 1 moves downward, causing the transmission rod 1 to disengage from the step contact surface of the tapered expansion block 14 as it moves up and down. As a result, the tapered expansion block 14 moves downward with the transmission rod 1, causing the outer conical surface of the tapered expansion block 14 to separate from the inner surface of the spherical measuring slide head 13. Then, release the dial indicator pressure block 4. The spring 3 opens due to the pre-tightening force, and the transmission rod 1 moves upward, causing the transmission rod 1 to fit against the step contact surface of the tapered expansion block 14 as it moves up and down. As a result, the tapered expansion block 14 moves upward with the transmission rod 1, causing the outer conical surfaces on both sides of the tapered expansion block 14 to contact the inner surfaces on both sides of the spherical measuring slide head 13. At the same time, the spherical measuring slide head 13 can expand outward along the guide block 10 until it contacts the dial indicator. The inner side of the standard part 16, wherein the outer conical surface of the conical expansion block 14 is a sloping surface that is narrower at the top and wider at the bottom; then the dial indicator 5 is screwed into the dial indicator clip 7 through the thread on the dial indicator clip nut 6 and placed in the tenon groove measuring rod distance measuring body 8, and at the same time the extension rod connected below the dial indicator 5 contacts one end of the detection lever 9. Then the other end of the detection lever 9 moves upward to the upper end of the limit groove 18 of the transmission rod 1 and stops moving. At this time, the pointer of the dial indicator 5 rotates clockwise 2 to 3 times and then stops rotating. The dial indicator 5 stops rotating downward and the inside of the dial indicator 5 is in a compressed state; when the spherical measuring slide 13 contacts the inner side of the standard part 16, the spherical measuring slide 13 stops expanding outward and the conical expansion block 14 stops moving upward. The transmission rod 1 stops moving upward and reacts to the detection lever 9. The detection lever 9 is in a balanced state. At this time, the dial reading of the dial indicator 5 is zero. Secondly, the object to be tested is the turbine disk tenon groove 17. First, press down the dial gauge pressure block 4, compress the spring 3, and place the tenon groove measuring rod distance measuring body 8 at the corresponding measuring rod distance position of the turbine disk tenon groove 17 to be tested. Then release the dial gauge pressure block 4. At this time, under the pre-tightening force of the spring 3, the transmission rod 1 moves upward. Through the linkage between the transmission rod 1 and the conical expansion block 14, the conical expansion block 14 moves upward until it stops when it is in contact with the inner side of the spherical measuring slide head 13. The testing lever 9 moves upward under the compression pre-tightening force of the dial gauge 5 until it stops when it is in contact with the upper end of the limit groove 18 built into the transmission rod 1. At this time, the reading of the dial gauge 5 is the difference between the measured value of the turbine disk tenon groove 17 measuring rod distance and the measured value of the standard part 16. Then, the value is obtained by the calculation formula of the measured value of the turbine disk tenon groove measuring rod distance.

[0029] The turbine disk tenon 17 is equipped with several measuring rods. The distance between two measuring rods on the same horizontal line is the measuring rod distance. The standard part 16 is a regular shaped tenon, and its design parameters are the tenon bottom width f and the tenon height e. f is the sum of the theoretical minimum value of the measuring rod distance A and the theoretical value of twice the measuring rod diameter D minus 0.2. e is the distance from the outer circle of the turbine disk to the bottom of the tenon, where 0.2 is a design constant. At this time, the pointer of the dial indicator 5 is zeroed. At the same time, it is convenient to detect the lever 9 under the action of the compression preload of the dial indicator 5 when the measured value of the measuring rod distance of the turbine disk tenon 17 is too small. One end moves upward, driving the transmission rod 1 to continue moving upward. The transmission rod 1 then drives the conical expansion block 14 upward until the spherical measuring slide head 13 expands to both sides and contacts the inner surface of the turbine disk tenon groove 17, at which point the movement stops. The measured value of the turbine disk tenon groove gauge bar distance is equal to the measured value of the gauge bar distance of the standard part 16 plus / minus the dial indicator 5 reading minus twice the measured gauge bar diameter. The method for distinguishing between + / - on the dial indicator 5 reading is as follows: when testing the standard part 16, the dial indicator 5 pointer is zeroed; when testing the turbine disk tenon groove, a pointer to the left of zero is negative, and a pointer to the right of zero is positive. By sliding this testing device along the tenon groove thickness direction, the gauge bar distance value of multi-section tenons grooves can be measured quickly, facilitating the study of the mechanism of tenon groove broaching deformation.

Claims

1. A high-precision detection device for the tenon groove spacing of a turbine disk, characterized in that, The device includes a tenon and groove gauge body (8), a detection lever (9), a vertically arranged transmission rod (1), a pressure block (4) located at the upper end of the transmission rod (1), a spring (3) located below the pressure block (4), a dial indicator (5) fixed on the tenon and groove gauge body (8), a conical expansion block (14) sleeved on the lower part of the transmission rod (1), spherical measuring slides (13) located on both sides of the conical expansion block (14), and a guide block (10) placed on the spherical measuring slides (13); the transmission rod (1) is provided with a limiting groove (18) for the detection... One end of the measuring lever (9) moves within the range of the limiting groove (18); the conical expansion block (14) is located between the two spherical measuring slides; the guide block (10) and the spherical measuring slide (13) are both provided in twos, and are both set with the transmission rod (1) as the axis of symmetry; the device profile fits the turbine disk tenon groove profile, the device profile is provided with two round holes of the same size as the spherical measuring slide (13), and the device profile is made of rigid material; the standard part (16) is a regular shaped tenon groove; the object detected by the device is the turbine disk tenon groove (17). The transmission rod (1) is in contact with one end of the detection lever (9); the outer conical surfaces on both sides of the conical expansion block (14) are in contact with the inner surfaces of the spherical measuring slides (13) on both sides respectively. The outer conical surfaces on both sides of the conical expansion block (14) are inclined surfaces that are narrow at the top and wide at the bottom. The conical expansion block (14) and the transmission rod (1) are always relatively stationary. When the transmission rod (1) is pressed down, one end of the detection lever (9) moves down and the other end moves up and acts on the dial indicator (5). The conical expansion block (14) and the transmission rod (1) remain relatively stationary. The conical expansion block (14) moves down and causes the contact surface between the conical expansion block (14) and the spherical measuring slide (13) to separate. Under the action of external force, the spherical measuring slide (13) can retract inward relative to the conical expansion block (14) along the guide block (10). When the test lever (9) is balanced, the dial indicator (5) pointer returns to zero; when the test lever (9) is tilted, the dial indicator (5) displays a non-zero value.

2. The high-precision detection device for turbine disk tenon groove spacing according to claim 1, characterized in that, The outer cone angle d of the conical expansion block (14) is 63.4°.

3. A detection method using the high-precision detection device for turbine disk tenon groove gauge spacing as described in claim 1, characterized in that, Includes the following steps: 1) Zeroing the dial indicator (5) using the standard part (16) includes: first pressing down the gauge block (4), causing the transmission rod (1) to drive the conical expansion block (14) to move downwards simultaneously, causing the outer conical surface of the conical expansion block (14) to separate from the contact surface of the spherical measuring slide (13); then releasing the gauge block (4), causing the conical expansion block (14) to rise through the reset action of the spring (3) until the outer conical surface of the conical expansion block (14) is in contact with the inner surface of the spherical measuring slide (13), causing the spherical measuring slide (13) to expand outwards until the outer end of the spherical measuring slide (13) contacts the inner surface of the standard part (16); then placing the dial indicator (5) in the tenon groove. In the bar distance measuring body (8), the extension rod below the dial indicator (5) is simultaneously brought into contact with one end of the detection lever (9). Then, the other end of the detection lever (9) moves upward to the upper end of the limit groove (18) of the transmission rod (1) and stops moving. At this time, the pointer of the dial indicator (5) stops rotating and the dial indicator (5) stops rotating downward. When the spherical measuring slide (13) contacts the inner side of the standard part (16), the spherical measuring slide (13) stops expanding outward and the conical expansion block (14) stops moving upward. The transmission rod (1) stops moving upward and reacts to the detection lever (9). The detection lever (9) is in a balanced state. At this time, the dial reading of the dial indicator (5) is zero. 2) Measure the turbine disk tenon groove (17) and record the reading of the dial indicator (5); 3) The measured value of the turbine disk tenon groove gauge bar distance is obtained by calculation formula; the calculation formula is: measured value of turbine disk tenon groove (17) gauge bar distance = measured value of gauge bar distance of standard part (16) + / - dial gauge (5) reading - twice the measured value of gauge bar diameter.

4. The high-precision detection method for the tenon groove spacing of a turbine disk according to claim 3, characterized in that, The parameters of the standard part (16) are as follows: the bottom width f of the tenon groove is the sum of the minimum theoretical value of the tenon groove gauge bar distance and the theoretical value of twice the gauge bar diameter minus 0.2; the height e of the tenon groove is the distance from the outer circle of the turbine disk to the bottom of the tenon groove.

5. The high-precision detection method for the tenon groove spacing of a turbine disk according to claim 3, characterized in that, The method for distinguishing the + / - reading of the dial indicator (5) is to set the pointer of the dial indicator (5) to zero when testing the standard part (16), and to set the pointer of the dial indicator (5) to the left of zero when testing the turbine disk tenon groove, and to set the pointer to the right of zero when the pointer is negative.

Images