A quick detection device and method for circumferential gap of compressor rectification fan segment

Abstract

A kind of quick detection device and method of compressor rectification fan segment circumferential gap, the detection device includes bottom plate, arc-shaped slot is opened in the top surface of bottom plate, center is m1;Positioning ring is fixedly installed at the top surface of bottom plate near right end position, positioning ring has outer cylindrical surface and center is m, center m and center m1 coincide;Slide is provided on the top surface of bottom plate, the inner cylindrical surface of slide and the outer cylindrical surface of positioning ring are in sliding contact, the plane of the left side of block passes through the center m of the outer cylindrical surface of positioning ring;Locking mechanism is arranged between bottom plate and slide for locking the slide;Fixed block is fixedly installed at the top surface of bottom plate near left end position, the right side of fixed block is locating surface;Supporting block is arranged between fixed block and slide for supporting rectification fan segment;Positioning mechanism that can be moved along arc-shaped slot is arranged on the top surface of bottom plate for positioning the center position of rectification fan segment;Pressing mechanism is provided on bottom plate for pressing rectification fan segment.

Description

Technical Field

[0001] This invention relates to the field of aero-engine manufacturing and testing technology, specifically to a device and method for rapid detection of circumferential clearance in the compressor rectifier fan section. Background Technology

[0002] The compressor is a core component of an aero-engine, internally divided into rotor blade assemblies and stator blade assemblies, the latter also known as the rectifier fan. Air flowing into the compressor is continuously accelerated by the high-speed rotating rotor blades, then decelerates upon encountering the stationary stator blades. During this process, the air is compressed, increasing its pressure and converting kinetic energy into internal energy, raising its temperature to meet the combustion chamber's requirements. During operation, the compressor endures high temperature, high pressure, high centrifugal loads, and intense airflow impact, causing internal bending, torsional deformation, expansion, and stretching. This leads to the inner edge plates of the rectifier fan pressing against each other, and excessive local stress can cause cracks, affecting engine operation and reducing its lifespan. Therefore, in the design, a small gap of 0.1mm to 0.4mm, i.e., a circumferential gap, is reserved between the inner edge plates 22 of the rectifier fan section 20. Specifically, as... Figures 1 to 3 As shown, the rectifier fan segment 20 includes an outer edge plate 21 and an inner edge plate 22, connected by multiple blades. The outer edge plate 21 and the inner edge plate 22 are concentrically arranged. The cross-section of the left end face 21a of the outer edge plate 21 and the plane containing the right end face 21b of the outer edge plate both pass through the center of the rectifier fan segment 20. The left end face 22a of the inner edge plate 22 is coplanar with the left end face 21a of the outer edge plate. The right end face 22b of the inner edge plate is offset inward by 0.1mm to 0.4mm relative to the right end face 21b of the outer edge plate. Multiple rectifier fan segments 20 are combined to form a complete ring. The outer edge plates 21 of the complete ring are theoretically completely closed, and the circumferential gap is formed where the inner edge plates 22 are connected, i.e., a circumferential gap is formed at the position of the right end face 22b of the inner edge plate. It is necessary to check whether the circumferential gap of the manufactured rectifier fan segment meets the design requirements. Current inspection methods include coordinate measuring machine (CMM), which involves positioning and clamping the sector segment, then using a probe to collect the center of the sector segment. Using this center as the origin, axial and radial references are established, and the specific coordinate values ​​of the inner and outer edge plate cross-sections are calculated. The circumferential clearance is then calculated using software. This method requires a high level of expertise from the inspectors, is time-consuming, involves complex clamping and alignment, and is very labor-intensive. Another method uses a depth gauge with an accuracy of 0.02 or higher. The reference surface is placed against the outer edge plate cross-section, and the measuring head is placed against the inner edge plate to read the values. This method is highly dependent on the accuracy of the operator's operation. Due to the unstable reference fit, different operators can obtain significantly different values, making the measurement inaccurate. Summary of the Invention

[0003] The main objective of this invention is to provide a rapid detection device and method for the circumferential clearance of the compressor rectifier fan section, aiming to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this invention proposes a rapid detection device for the circumferential clearance of a compressor rectifier fan section. The device includes a base plate with an arc-shaped groove on its top surface, the center of which is m1. A positioning ring is fixedly installed on the top surface of the base plate near its right end. The positioning ring has an outer cylindrical surface with its center m, which coincides with the center m1. A slider is provided on the top surface of the base plate, the inner cylindrical surface of which has the same diameter as the outer cylindrical surface of the positioning ring. The inner cylindrical surface of the slider slides in contact with the outer cylindrical surface of the positioning ring, allowing the slider to slide along the outer cylindrical surface of the positioning ring. The plane containing the left side of the slider passes through the center m of the outer cylindrical surface of the positioning ring; a locking mechanism is provided between the base plate and the slider to lock the slider; a fixing block is fixedly installed on the top surface of the base plate near the left end, and the right side of the fixing block is the positioning surface, the plane containing the positioning surface passes through the center m of the outer cylindrical surface of the positioning ring; a support block is provided between the fixing block and the slider to support the rectifier fan section; a positioning mechanism that can move along the arc groove is provided on the top surface of the base plate to position the center position of the rectifier fan section; a pressing mechanism is provided on the base plate to press the rectifier fan section.

[0005] Preferably, the positioning mechanism includes a first support that can slide along the arc groove on the top surface of the base plate, a measuring ruler on the first support, the measuring ruler having a ruler body, a measuring head at the outer end of the ruler body, the axis of the measuring head being parallel to the length direction of the ruler body, and the ruler body being movable along its length direction, and the axis of the measuring head being perpendicular to the arc of the arc groove.

[0006] Preferably, precision holes are provided on both sides of the first support, and pins are inserted into the precision holes. The lower end of the pin extends into the arc-shaped groove, and the lower end of the pin slides with the two side walls of the arc-shaped groove. The outer cylindrical surface of the pin is stepped, the pin is interference-fitted with the precision hole, and the single-sided gap between the outer cylindrical surface of the pin and the side wall of the arc-shaped groove is ≤0.02mm.

[0007] Preferably, the center line connecting the two pins forms a chord, and the measuring ruler is a digital display structure, including a ruler body and a digital display fixedly mounted on the first support; the ruler body can slide along its length within the digital display, and the digital display is used to display the movement distance of the ruler body; a set screw is provided on the side of the digital display to tighten the ruler body; the axis of the measuring head coincides with the vertical bisector of the chord formed by the center line connecting the two pins.

[0008] Preferably, a vertical zero-adjustment surface is provided on the first support, which is parallel to the line connecting the centers of the two pins to form a chord; the detection device also includes a zero-adjustment plate, which is used to attach to the zero-adjustment surface of the first support and to zero the measuring scale.

[0009] Preferably, the clamping mechanism includes multiple L-shaped pressure plates disposed on the top surface of the base plate, with clamping screws passing through the pressure plates and connected to the base plate; the pressure plates are located outside the support block and are used to clamp the outer edge plate of the rectifier fan section; the locking mechanism is a third screw, with an oblong hole on the slider; the center of the oblong hole coincides with the center m of the outer cylindrical surface of the positioning ring; the threaded end of the third screw passes through the oblong hole and is threadedly connected to the base plate.

[0010] Preferably, a second support is provided on the top surface of the base plate, the second support being located on the outside of the support block; a second screw is provided on the second support for tightening the outer edge plate of the rectifier fan section.

[0011] On the other hand, the present invention also provides a method for rapid detection of circumferential clearance in a compressor rectifier fan section, employing the aforementioned rapid detection device, and comprising the following steps:

[0012] Step S1: Place the rectifier fan section on the support block, so that the left end face of the outer edge plate and the left end face of the inner edge plate of the rectifier fan section abut against the positioning surface of the fixed block;

[0013] Step S2: Use the positioning mechanism to position the center of the rectifier fan section and adjust the radial position of the rectifier fan section so that the center of the rectifier fan section coincides with the center of the arc groove m1. Then use the clamping mechanism to clamp the rectifier fan section.

[0014] Step S3: Push the slider to slide along the outer cylindrical surface of the positioning ring, so that the left side of the slider abuts against the right end face of the outer edge plate of the rectifier fan section; and use the locking mechanism to lock the slider; simulate a circumferential gap between the left side of the slider and the right end face of the inner edge plate of the rectifier fan section.

[0015] Step S4: Use a plug gauge to check whether the circumferential clearance meets the requirements.

[0016] Preferably, in step S2, the center of the rectifier fan section is positioned using a positioning mechanism, including the following steps:

[0017] Step S201: Based on the inner diameter of the inner edge plate of the rectifier fan section D. Calculate the distance L2 between the zero-adjustment surface of the first support and the center m of the positioning ring, and the distance L1 between the end of the measuring head and the zero-adjustment surface of the first support, where: L1 = D / 2-L2;

[0018] Step S202: After pressing the zero adjustment plate tightly against the zero adjustment surface of the first support, push the measuring scale body to slide inside the digital display so that the measuring head abuts the zero adjustment plate. Press the zero adjustment key "Zero" in the digital display to zero the digital display. Remove the zero adjustment plate and push the scale body outward so that the value displayed on the digital display is equal to L1. Tighten the set screw on the side of the digital display to tighten the scale body.

[0019] Step S203: Rotate the second screw on the second support so that the second screw abuts against the outer edge plate of the rectifier fan section, and adjust the radial position of the rectifier fan section so that the inner edge plate of the rectifier fan section abuts against the measuring head.

[0020] Step S204: Loosen the set screw on the side of the digital display, push the first support to slide along the arc groove to the measurement points a and b near the left and right ends of the rectifier fan section, respectively, and make the measuring head abut against the measurement points a and b on the inner edge plate. Observe the readings of the digital display, and calculate the difference between the two readings and L1. If the difference is within ±0.02, it means that the center of the rectifier fan section coincides with the center of the arc groove m1.

[0021] Preferably, in step S4, the go end design dimension S of the plug gauge is... min Minimum required circumferential clearance L min Equal, i.e., S min =L min The maximum value L required for the design dimensions of the stop end and the circumferential clearance. max Equal, i.e., S max =L max Try inserting a plug gauge into the circumferential clearance, and finally judge the result: if the plug gauge's go end S... min Able to be inserted into the gap, stop end S max If insertion is not possible, it indicates a circumferential clearance L. 实测 If the requirements are met, the rest indicates that the processing is out of tolerance and needs to be reworked.

[0022] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0023] (1) In this invention, a positioning mechanism is used to locate the center position of the rectifier fan segment, and a clamping mechanism is used to clamp the rectifier fan segment. At the same time, a slider slides along the outer cylindrical surface of the positioning ring, so that the left side of the slider abuts against the right end face of the outer edge plate of the rectifier fan segment. A circumferential gap is simulated between the left side of the slider and the right end face of the inner edge plate of the rectifier fan segment. A feeler gauge can be used to detect whether the circumferential gap meets the requirements. Compared with the currently used coordinate measuring machine and depth caliper measurement, this invention has high measurement accuracy, fast speed, simple operation, clear measurement results, low requirements for the professional level of the measuring personnel, can measure fan segments with different diameters and angles, and can greatly save working time and improve efficiency.

[0024] (2) The detection device and method provided by the present invention can inspect the circumferential clearance of sector parts with different diameters and angles; when it is necessary to inspect other diameter dimensions... When rectifying sector D, simply use the formula L1= D / 2-L2 calculates the corresponding L1 value. After zeroing the caliper 8, it is moved so that the distance between the end of the measuring head and the zeroing surface of the first support is L1. The center of the rectifier fan section can be located. The circumferential gap can be simulated between the left side of the slider and the right end of the inner edge plate of the rectifier fan section, and then a feeler gauge can be used for detection. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A 3D structural diagram of the rectifier sector;

[0027] Figure 2 This is a top view of the rectifier sector;

[0028] Figure 3 for Figure 2 Enlarged view of section A of the intermediate rectifier sector;

[0029] Figure 4 This is a three-dimensional structural diagram of the rapid detection device provided by the present invention;

[0030] Figure 5 This is a top view of the rapid detection device provided by the present invention;

[0031] Figure 6 This is a top view of the base plate in the rapid detection device provided by the present invention;

[0032] Figure 7 These are the front view and left view of the positioning ring in the rapid detection device provided by the present invention;

[0033] Figure 8 The images show the front view and three-dimensional structure of the slider in the rapid detection device provided by the present invention.

[0034] Figure 9 This is a three-dimensional structural diagram of the fixing block in the rapid detection device provided by the present invention;

[0035] Figure 10 This is a three-dimensional structural diagram of the first support in the rapid detection device provided by the present invention;

[0036] Figure 11 This is a schematic diagram showing the fit between the pin and the precision hole and the arc groove in this invention;

[0037] Figure 12This is a three-dimensional structural diagram of the plug gauge used in this method.

[0038] Explanation of reference numerals: 1. Base plate; 1a. Arc groove; 2. Positioning ring; 2a. Outer cylindrical surface; 3. Slider; 3a. Inner cylindrical surface; 3b. Left side face; 3c. Waist-shaped hole; 4. Support block; 5. Fixing block; 6. First support; 6a. Precision hole; 6b. Zeroing surface; 7. Digital display; 8. Scale body; 9. Measuring head; 10. Zeroing plate; 11. Pin; 11a. String; 12. Pressure plate; 13. Plug gauge; 14. Second support; 15. Cylindrical pin; 16. First screw; 17. Second screw; 18. Third screw; 19. Handle; 20. Rectifier fan section; 21. Outer edge plate; 21a. Left end face of outer edge plate; 21b. Right end face of outer edge plate; 22. Inner edge plate; 22a. Left end face of inner edge plate; 22b. Right end face of inner edge plate. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0041] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0042] Combination Figures 1 to 3As shown, the rectifier fan section 20 includes an outer edge plate 21 and an inner edge plate 22, and the outer edge plate 21 and the inner edge plate 22 are connected by multiple blades. The outer edge plate 21 and the inner edge plate 22 are concentrically arranged, that is, the center of the rectifier fan segment 20, the center of the outer edge plate 21, and the center of the inner edge plate 22 coincide. The cross section where the left end face 21a of the outer edge plate 21 is located and the plane where the right end face 21b of the outer edge plate is located both pass through the center of the rectifier fan segment 20. The left end face 22a of the inner edge plate 22 is coplanar with the left end face 21a of the outer edge plate. The right end face 22b of the inner edge plate is offset inward by 0.1mm to 0.4mm relative to the right end face 21b of the outer edge plate. After multiple rectifier fan segments 20 are combined, they form a complete ring. The outer edge plates 21 of the complete ring are theoretically completely closed. The circumferential gap is formed where the inner edge plates 22 are connected, that is, a circumferential gap is formed at the position of the right end face 22b of the inner edge plate.

[0043] In this embodiment, taking the A-stage rectifier fan segment 20 of a novel aero-engine compressor as an example, according to the design requirements: the angle of the finished fan segment is 30°±3′, and the inner diameter of the inner edge plate 22 is... D is 542.50mm~ The inner diameter is 542.62 mm, and the circumferential gap formed at the right end face 22b of the inner edge plate is 0.1–0.4 mm. During measurement, the inner diameter of the inner edge plate 22 is... D takes the median value, that is D= 542.56mm, maximum circumferential clearance L max =0.4mm, minimum circumferential clearance L min =0.1mm.

[0044] Combination Figures 4 to 12 As shown, this embodiment proposes a rapid detection device for the circumferential clearance of a compressor rectifier fan section, including a base plate 1. The base plate 1 serves as the supporting and connecting part of the entire detection device, on which all components are placed. An arc-shaped groove 1a is formed on the top surface of the base plate 1, with the center of the arc-shaped groove 1a being m1; the middle diameter of the arc-shaped groove 1a is... 306mm, with a coverage angle of 60°, which is greater than the angle of 30° of the rectifier fan section 20.

[0045] A positioning ring 2 is fixedly installed on the top surface of the base plate 1 near the right end. The positioning ring 2 has an outer cylindrical surface 2a, the center of which is m, and the center m coincides with the center m1. The positioning ring 2 is fixedly installed on the base plate 1 by screws and positioning pins.

[0046] A slider 3 is provided on the top surface of the base plate 1. The inner cylindrical surface 3a of the slider 3 has the same diameter as the outer cylindrical surface 2a of the positioning ring 2, and both are designed as follows: The inner cylindrical surface 3a of the slider 3 is 535mm long and makes slidable contact with the outer cylindrical surface 2a of the positioning ring 2. The slider 3 can slide along the outer cylindrical surface 2a of the positioning ring 2. The plane containing the left side surface 3b of the slider 3 passes through the center m of the outer cylindrical surface 2a of the positioning ring 2. A locking mechanism is provided between the base plate 1 and the slider 3 to lock the slider 3. The locking mechanism is a third screw 18. A waist-shaped hole 3c is provided on the slider 3. The center of the waist-shaped hole 3c coincides with the center m of the outer cylindrical surface 2a of the positioning ring 2. The threaded end of the third screw 18 passes through the waist-shaped hole 3c and is threadedly connected to the base plate 1. When the third screw 18 is tightened, the slider 3 is locked. When the third screw 18 is loosened, the slider 3 is unlocked.

[0047] A fixing block 5 is fixedly installed on the top surface of the base plate 1 near the left end. The right side of the fixing block 5 is a positioning surface 5a, and the plane containing the positioning surface 5a passes through the center m of the outer cylindrical surface 2a of the positioning ring 2. The positioning surface 5a is used to abut against the left end face 21a of the outer edge plate and the left end face 22a of the inner edge plate of the rectifier fan section 20. The fixing block 5 is fixedly installed on the base plate 1 by a cylindrical pin 15 and a first screw 16.

[0048] A support block 4 is provided between the fixed block 5 and the slider 3. The size of the support block 4 covers the inner and outer diameters of the rectifier sector 20 to be tested, and the angle of 28° is slightly smaller than the rectifier sector 30°. It is used to support the rectifier sector 20.

[0049] A positioning mechanism that can move along the arc groove 1a is provided on the top surface of the base plate 1 to position the center position of the rectifier fan section 20; a pressing mechanism is provided on the base plate 1 to press the rectifier fan section 20.

[0050] In this embodiment, the positioning mechanism includes a first support 6 disposed on the top surface of the base plate 1, which can slide along the arc-shaped groove 1a. A measuring scale is disposed on the first support 6. The measuring scale has a scale body 8, and a measuring head 9 is disposed on the outer end of the scale body 8. The axis of the measuring head 9 is parallel to the longitudinal direction of the scale body 8, and the scale body 8 can move along its longitudinal direction. The axis of the measuring head 9 is perpendicular to the arc of the arc-shaped groove 1a. Specifically, precision holes 6a are respectively opened on both sides of the first support 6. A pin 11 is inserted into the precision hole 6a. The lower end of the pin 11 extends into the arc-shaped groove 1a, and the lower end of the pin 11 slides against the two side walls of the arc-shaped groove 1a. The outer cylindrical surface of the pin 11 is stepped. The pin 11 and the precision hole 6a have a diameter of [missing information]. An 8mm interference fit, the lower diameter of the pin 11 is... The single-sided gap between the lower outer cylindrical surface and the side wall of the arc-shaped groove 1a is ≤0.02mm.

[0051] The connecting line of the two pins 11 forms a chord 11a. The measuring ruler is a digital display structure, including a ruler body 8 and a digital display 7 fixedly mounted on the first support 6. The ruler body 8 can slide within the digital display 7 along its length, that is, the direction of movement of the ruler body 8 precisely passes through the center m of the positioning ring 2. The movement distance of the ruler body 8 is accurately calculated by the chip inside the digital display 7 and displayed to the percentile. A set screw is provided on the side of the digital display 7 to tighten the ruler body 8. The axis of the measuring head 9 coincides with the vertical bisector of the chord 11a formed by the connecting line of the two pins 11.

[0052] A vertical zeroing surface 6b is provided on the first support 6. This zeroing surface 6b is parallel to the line connecting the centers of the two pins 11, forming a chord 11a. The detection device also includes a zeroing plate 10, which is used to attach to the zeroing surface 6b of the first support 6 and to zero the measuring scale. The distance between the zeroing surface 6b and the center m of the positioning ring 2 is designed to be a fixed value L2 = 240 mm.

[0053] In this embodiment, the clamping mechanism includes a plurality of L-shaped pressure plates 12 disposed on the top surface of the base plate 1, and clamping screws are provided on the pressure plates 12 and connected to the base plate 1; the pressure plates 12 are located outside the support block 4 and are used to clamp the outer edge plate 21 of the rectifier fan section 20.

[0054] A second support 14 is provided on the top surface of the base plate 1, and the second support 14 is located on the outside of the support block 4; a second screw 17 is provided on the second support 14 for tightening the outer edge plate 21 of the rectifier fan section 20.

[0055] Handles 19 are provided on the left and right ends of the base plate 1 to facilitate the use of the entire device.

[0056] On the other hand, this embodiment also proposes a rapid detection method for the circumferential clearance of the compressor rectifier fan section, which uses the above-mentioned rapid detection device and includes the following steps:

[0057] Step S1: Place the rectifier fan section 20 on the support block 4, so that the left end face 21a of the outer edge plate and the left end face 22a of the inner edge plate of the rectifier fan section 20 abut against the positioning surface 5a of the fixing block 5.

[0058] Step S2: Use the positioning mechanism to position the center of the rectifier fan section 20, and adjust the radial position of the rectifier fan section 20 so that the center of the rectifier fan section 20 coincides with the center of the arc groove 1a (m1). Then use the clamping mechanism to clamp the rectifier fan section 20.

[0059] Step S3: Push the slider 3 to slide along the outer cylindrical surface 2a of the positioning ring 2, so that the left side surface 3b of the slider 3 abuts against the right end surface 21b of the outer edge plate of the rectifier fan section 20; and use the pressure plate 12 to lock the slider 3; simulate a circumferential gap between the left side surface 3b of the slider 3 and the right end surface 22b of the inner edge plate of the rectifier fan section 20.

[0060] Step S4: Use plug gauge 13 to check whether the circumferential clearance meets the requirements.

[0061] In step S2, the center of the rectifier sector 20 is positioned using a positioning mechanism, including the following steps:

[0062] Step S201: Based on the inner diameter of the inner edge plate 22 of the rectifier fan section 20 D. Calculate the distance L2 between the zero-adjustment surface 6b of the first support 6 and the center m of the positioning ring 2, and the distance L1 between the end of the measuring head 9 and the zero-adjustment surface 6b of the first support 6, where: L1 = D / 2-L2= 542.56 / 2-240=31.28mm;

[0063] Step S202: After pressing the zero adjustment plate 10 tightly against the zero adjustment surface 6b of the first support 6, push the measuring scale body 8 to slide inside the digital display 7 so that the measuring head 9 abuts against the zero adjustment plate 10. Press the zero adjustment key Zero in the digital display 7 to zero the digital display 7. Remove the zero adjustment plate 10 and push the scale body 8 outward so that the value displayed on the digital display 7 is equal to 31.28mm. Tighten the set screw on the side of the digital display 7 to tighten the scale body 8.

[0064] Step S203: Rotate the second screw 17 on the second support 14 so that the second screw 17 abuts against the outer edge plate 21 of the rectifier fan section 20, and adjust the radial position of the rectifier fan section 20 so that the inner edge plate 22 of the rectifier fan section 20 abuts against the measuring head 9.

[0065] Step S204: Loosen the set screw on the side of the digital display 7, push the first support 6 to slide along the arc groove 1a to the measurement points a and b near the left and right ends of the rectifier fan section 20, and make the measuring head 9 abut against the measurement points a and b of the inner edge plate 22. Observe the readings of the digital display 7, and calculate the difference between the two readings and L1. If the difference is within ±0.02, it means that the center of the rectifier fan section 20 coincides with the center of the arc groove 1a.

[0066] In step S4, the go end design dimension S of the plug gauge 13 is... min Minimum required circumferential clearance L min Equal, i.e., S min =L min=0.1mm, the maximum value of the stop end design dimension and the circumferential clearance requirement L max Equal, i.e., S max =L max =0.4mm; Try inserting plug gauge 13 into the circumferential clearance, and finally judge the result: if the go end S of plug gauge 13 is 0.4mm; min Able to be inserted into the gap, stop end S max If insertion is not possible, it indicates a circumferential clearance L. 实测 If the requirements are met, the rest indicates that the processing is out of tolerance and needs to be reworked.

[0067] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A rapid detection device for the circumferential clearance of a compressor rectifier fan section, characterized in that: Includes a base plate (1), and an arc-shaped groove (1a) is provided on the top surface of the base plate (1), with the center of the arc-shaped groove (1a) being m1; A positioning ring (2) is fixedly installed on the top surface of the base plate (1) near the right end. The positioning ring (2) has an outer cylindrical surface (2a) with the center m of the outer cylindrical surface (2a) and the center m coincides with the center m1. A slider (3) is provided on the top surface of the base plate (1). The inner cylindrical surface (3a) of the slider (3) has the same diameter as the outer cylindrical surface (2a) of the positioning ring (2). The inner cylindrical surface (3a) of the slider (3) and the outer cylindrical surface (2a) of the positioning ring (2) are in sliding contact. The slider (3) can slide along the outer cylindrical surface (2a) of the positioning ring (2). The plane on the left side (3b) of the slider (3) passes through the center m of the outer cylindrical surface (2a) of the positioning ring (2). A locking mechanism is provided between the base plate (1) and the slider (3) to lock the slider (3). A fixing block (5) is fixedly installed on the top surface of the base plate (1) near the left end. The right side of the fixing block (5) is the positioning surface (5a). The plane where the positioning surface (5a) is located passes through the center m of the outer cylindrical surface (2a) of the positioning ring (2). A support block (4) is provided between the fixed block (5) and the slider (3) to support the rectifier fan section (20); A positioning mechanism that can move along the arc groove (1a) is provided on the top surface of the base plate (1) to position the center position of the rectifier fan section (20); a pressing mechanism is provided on the base plate (1) to press the rectifier fan section (20). The positioning mechanism includes a first support (6) that can slide along the arc groove (1a) on the top surface of the base plate (1), a measuring scale on the first support (6), the measuring scale having a scale body (8), a measuring head (9) on the outer end of the scale body (8), the axis of the measuring head (9) being parallel to the length direction of the scale body (8), and the scale body (8) being movable along its length direction, and the axis of the measuring head (9) being perpendicular to the arc of the arc groove (1a); Precision holes (6a) are respectively opened on both sides of the first support (6), and pins (11) are inserted into the precision holes (6a). The lower end of the pin (11) extends into the arc groove (1a), and the lower end of the pin (11) slides with the two side walls of the arc groove (1a). The outer cylindrical surface of the pin (11) is stepped. The pin (11) is interference-fitted with the precision hole (6a). The single-sided gap between the outer cylindrical surface of the pin (11) and the side wall of the arc groove (1a) is ≤0.02mm. The center line connecting the two pins (11) forms a chord (11a). The measuring ruler is a digital display structure, including a ruler body (8) and a digital display (7) fixedly mounted on the first support (6). The ruler body (8) can slide along its length within the digital display (7). The digital display (7) is used to display the moving distance of the ruler body (8). A set screw is provided on the side of the digital display (7) to tighten the ruler body (8). The axis of the measuring head (9) coincides with the vertical bisector of the chord (11a) formed by the center line connecting the two pins (11).

2. The rapid detection device for circumferential clearance of a compressor rectifier fan section as described in claim 1, characterized in that: A vertical zero-adjustment surface (6b) is provided on the first support (6), which is parallel to the line connecting the centers of the two pins (11) to form a chord (11a); the detection device also includes a zero-adjustment plate (10), which is used to attach to the zero-adjustment surface (6b) of the first support (6) and zero the measuring scale.

3. The rapid detection device for circumferential clearance of a compressor rectifier fan section as described in claim 1, characterized in that: The clamping mechanism includes multiple L-shaped clamping plates (12) disposed on the top surface of the base plate (1), clamping screws are provided on the clamping plates (12), and the clamping screws are connected to the base plate (1); the clamping plates (12) are located outside the support block (4) and are used to clamp the outer edge plate (21) of the rectifier fan section (20). The locking mechanism is a third screw (18), and a waist-shaped hole (3c) is provided on the slider (3); the center of the waist-shaped hole (3c) coincides with the center m of the outer cylindrical surface (2a) of the positioning ring (2); the threaded end of the third screw (18) passes through the waist-shaped hole (3c) and is threadedly connected to the base plate (1).

4. The rapid detection device for circumferential clearance of a compressor rectifier fan section as described in claim 1, characterized in that: A second support (14) is provided on the top surface of the base plate (1), and the second support (14) is located on the outside of the support block (4); a second screw (17) is provided on the second support (14) for tightening the outer edge plate (21) of the rectifier fan section (20).

5. A method for rapid detection of circumferential clearance in a compressor rectifier fan section, characterized in that, The rapid detection device according to any one of claims 1 to 4 includes the following steps: Step S1: Place the rectifier fan section (20) on the support block (4) so ​​that the left end face (21a) of the outer edge plate and the left end face (22a) of the inner edge plate of the rectifier fan section (20) abut against the positioning surface (5a) of the fixing block (5); Step S2: Use the positioning mechanism to position the center of the rectifier fan section (20), adjust the radial position of the rectifier fan section (20) so that the center of the rectifier fan section (20) coincides with the center of the arc groove (1a) m1, and then use the clamping mechanism to clamp the rectifier fan section (20). Step S3: Push the slider (3) to slide along the outer cylindrical surface (2a) of the positioning ring (2), and make the left side (3b) of the slider (3) abut against the right end face (21b) of the outer edge plate of the rectifier fan section (20); and use the locking mechanism to lock the slider (3); simulate a circumferential gap between the left side (3b) of the slider (3) and the right end face (22b) of the inner edge plate of the rectifier fan section (20); Step S4: Use a plug gauge (13) to check whether the circumferential clearance meets the requirements.

6. The method for rapid detection of circumferential clearance in a compressor rectifier fan section as described in claim 5, characterized in that, In step S2, the center of the rectifier sector (20) is positioned using a positioning mechanism, including the following steps: Step S201: Based on the inner diameter of the inner edge plate (22) of the rectifier fan section (20) D. The distance L2 between the zero adjustment surface (6b) of the first support (6) and the center m of the positioning ring (2) is used to calculate the distance L1 between the end of the measuring head (9) and the zero adjustment surface (6b) of the first support (6), where: L1 = D / 2-L2; Step S202: After pressing the zero adjustment plate (10) against the zero adjustment surface (6b) of the first support (6), push the body (8) of the measuring scale to slide inside the digital display (7) so that the measuring head (9) abuts against the zero adjustment plate (10), press the zero adjustment key Zero in the digital display (7) to zero the digital display (7); remove the zero adjustment plate (10), push the body (8) outward so that the value displayed on the digital display (7) is equal to L1; tighten the set screw on the side of the digital display (7) to tighten the body (8); Step S203: Rotate the second screw (17) on the second support (14) so ​​that the second screw (17) abuts against the outer edge plate (21) of the rectifier fan section (20) and adjust the radial position of the rectifier fan section (20) so that the inner edge plate (22) of the rectifier fan section (20) abuts against the measuring head (9); Step S204: Loosen the set screw on the side of the digital display (7), push the first support (6) along the arc groove (1a) to the measurement points a and b near the left and right ends of the rectifier fan section (20), and make the measuring head (9) abut against the measurement points a and b of the inner edge plate (22). Observe the reading of the digital display (7) respectively, and calculate the difference between the two readings and L1. If the difference is within ±0.02, it means that the center of the rectifier fan section (20) coincides with the center of the arc groove (1a) m1.

7. The method for rapid detection of circumferential clearance in a compressor rectifier fan section as described in claim 5, characterized in that, In step S4, the go end design dimension S of the plug gauge (13) used is... min Minimum required circumferential clearance L min Equal, i.e., S min =L min The maximum value L required for the design dimensions of the stop end and the circumferential clearance. max Equal, i.e., S max =L max ; Try inserting a plug gauge (13) into the circumferential clearance, and finally judge the result: if the go end S of the plug gauge (13) min Able to be inserted into the gap, stop end S max If insertion is not possible, it indicates a circumferential clearance L. 实测 If the requirements are met, the rest indicates that the processing is out of tolerance and needs to be reworked.

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