Throat detection assembly and method for a turbine guide vane

Abstract

The application discloses a throat detection assembly and a throat detection method of a turbine guide vane, the turbine guide vane comprises an inner ring and an outer ring coaxially arranged, the throat is a channel between blades arranged uniformly in a circumferential direction between the inner ring and the outer ring, the detection assembly comprises a positioning member and a detection ruler, the positioning member comprises a positioning guide arc arranged on a bottom surface and a guide space for guiding movement of the detection ruler, and the positioning guide arc is slidably arranged with the inner ring or the outer ring; the guide of the guide space is consistent with the direction of the throat, the detection ruler is matched with the throat along the guide space, and the width of the position where the detection ruler is clamped in the throat is the width of the throat. The throat detection assembly is used for detecting the width of the throat, the detection ruler is inserted into each throat only once, the width of the throat can be obtained to determine whether the set requirement is met, detection is completed, the operation is simpler and faster on the premise of meeting the accuracy, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of turbine guide vane detection, and in particular to a throat detection component and a throat detection method for a turbine guide vane. Background Art

[0002] The turbine section of an engine typically consists of multiple stages of blades. The turbine guide vane, with its curved structure, redirects gas flow, driving the rotating blades. The guide vane comprises coaxial inner and outer rings, with multiple circumferentially spaced blades positioned between them. The passageway between adjacent blades is called the throat, and the narrowest distance between adjacent blades is the throat width. Throat width is one of the most critical dimensions of the guide vane, directly affecting its airflow and, consequently, the engine's efficiency and functionality.

[0003] In the existing technology, the three-coordinate method is generally used to measure the throat width of the turbine guide vane. However, the three-coordinate method measurement process is complicated and time-consuming. Especially when each throat needs to be inspected, the time cost increases exponentially, greatly affecting the inspection efficiency. Summary of the Invention

[0004] One object of the present application is to provide a throat detection assembly for a turbine guide vane, which has a simple structure and is easy to operate.

[0005] Another object of the present application is to provide a method for detecting the throat of a turbine guide vane using the above-mentioned throat detection assembly, which method has high detection efficiency.

[0006] In order to achieve the above purpose, the following technical solutions cannot be invented:

[0007] A throat detection assembly of a turbine guide valve, the turbine guide valve comprising a coaxially arranged inner ring and an outer ring, the throat being a channel between blades uniformly arranged circumferentially between the inner and outer rings, the detection assembly comprising a positioning member and a detection ruler, the positioning member comprising a positioning guide arc arranged on a bottom surface and a guide space for guiding the movement of the detection ruler, the positioning guide arc being slidably engaged with the inner ring or the outer ring; the guidance of the guide space being consistent with the direction of the throat, the detection ruler engaging with the throat along the guide space, and the width of the position where the detection ruler is stuck in the throat being the width of the throat.

[0008] Preferably, the guide space includes a longitudinally arranged positioning reference surface and a positioning guide surface with an inclined surface on the upper wall, and the direction of the inclined surface is consistent with the throat direction.

[0009] Preferably, when the positioning guide arc is arranged in cooperation with the inner ring, the horizontal distance from the positioning reference plane to the positioning guide arc is equal to the radial distance from the inner ring to the throat section to be measured.

[0010] Preferably, the positioning guide arc has an arc-shaped positioning groove consistent with the radius of curvature of the inner ring or the outer ring.

[0011] Preferably, the positioning member comprises a first block and a second block, the bottom surface of the first block is provided with the positioning guide arc, one side wall surface of the first block is the positioning reference surface, the positioning guide surface of the second block is connected with the positioning reference surface at an angle to form a guide space, and the upper wall of the positioning guide surface is provided with an inclined surface consistent with the direction of the throat.

[0012] Preferably, the positioning reference surface and the positioning guide surface are both vertically arranged planes.

[0013] Preferably, the width of the detection ruler gradually increases or decreases along the length direction of the detection ruler, and the width of at least one end of the detection ruler is smaller than the width of the remaining part.

[0014] Preferably, the detection ruler has a detection reference surface and a detection guide surface extending along the length direction thereof, the detection reference surface cooperates with the positioning reference surface, and the detection guide surface cooperates with the inclined surface of the upper wall of the positioning guide surface.

[0015] Preferably, the detection ruler is provided with scales arranged at intervals along the length direction thereof, the range of the scales is 5.7-6.4 mm, and the difference between adjacent scales is 0.1 mm.

[0016] A throat detection method of a turbine guide vane, which adopts the detection assembly and the positioning cooperation of the turbine guide vane, comprises the following steps.

[0017] Step 1: slidably cooperating the positioning guide arc at the bottom of the positioning member with the inner ring or the outer ring of the turbine guide vane;

[0018] Step 2: when the detection ruler is inserted into the guide space and moved along the throat to be clamped to the throat, the width of the detection ruler is the width of the throat.

[0019] Preferably, the step 2 comprises the following steps.

[0020] inserting one end of the detection ruler into the guide space, and making the detection reference surface of the detection ruler abut against the positioning reference surface and the detection guide surface of the detection ruler abut against the inclined surface of the upper wall of the positioning guide surface;

[0021] inserting the detection ruler into the throat along the inclined direction of the positioning guide surface until the detection ruler is stopped by the blade;

[0022] acquiring the stopping position of the detection ruler;

[0023] According to the stop position, the size of the throat is obtained, and whether the throat meets the set requirement is judged.

[0024] Compared with the prior art, the present application has the following advantages:

[0025] 1、The positioning member includes a positioning guide arc arranged on the bottom surface, and the positioning guide arc is slidably arranged with the inner ring or the outer ring, so that the positioning member is positioned on the turbine guide.

[0026] 2、The positioning member includes a guide space for detecting the guide movement, and the guide space is guided in the same direction as the throat, so as to limit the inclination angle of the detection ruler when the detection ruler is inserted into the throat, and ensure the detection accuracy.

[0027] 3、The width of the detection ruler gradually increases or decreases, and at least one end is smaller than the rest, so that when the detection ruler is continuously inserted into the throat until the detection ruler is stopped by the blade, the width of the detection ruler at the stopping position is the width of the throat. In the detection process, each throat only needs to insert the detection ruler once, so as to obtain the width of the throat, compare it with the set requirement, judge whether it meets the requirement, and complete the detection. On the premise of meeting the accuracy, the operation is more simple and fast, and the detection efficiency is improved.

[0028] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings incorporated in and forming a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0030] Fig. 1(a) is a schematic view of a blade throat detection cross-sectional position according to an embodiment of the present application;

[0031] Fig. 1(b) is a schematic view of a throat size of a turbine guide according to an embodiment of the present application;

[0032] Figure 2 is a schematic view of a throat detection assembly detecting the throat of a turbine guide according to an embodiment of the present application;

[0033] Figure 3 is a perspective view of a positioning member in a throat detection assembly according to an embodiment of the present application at one angle;

[0034] Figure 4 is a perspective view of a positioning member in a throat detection assembly according to an embodiment of the present application at another angle;

[0035] Figure 5is a top view of a positioning member in a throat detection assembly according to an embodiment of the present application;

[0036] Figure 6 is a bottom view of a positioning member in a throat detection assembly according to an embodiment of the present application;

[0037] Figure 7 is a perspective view of a detection ruler at one angle in a throat detection assembly according to an embodiment of the present application;

[0038] Figure 8 is a perspective view of a detection ruler at another angle in a throat detection assembly according to an embodiment of the present application;

[0039] Figure 9 is a cross-sectional view of a throat detection assembly with a plug ruler detecting a throat of a turbine guide vane according to an embodiment of the present application.

[0040] Reference numerals

[0041] Throat detection assembly 100;

[0042] Positioning member 10; positioning guide arc 11; positioning surface 111; first block 12; positioning reference surface 121; second block 13; guide portion 14; positioning guide surface 141; guide space 15;

[0043] Detection ruler 20; scale 21; detection reference surface 22; detection guide surface 23;

[0044] Turbine guide vane 200; inner ring 201; outer ring 202; blade 203; throat 204. DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present application will now be described in detail with reference to the figures. It should be noted that the relative arrangements, numerical expressions, and values of the components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0046] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application or its application or uses.

[0047] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and devices can be viewed as part of the specification.

[0048] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0049] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] First, the throat detection assembly 100 of the turbine guide vane 200 according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0051] As shown in FIGS. 1 to 9 , a throat detection assembly 100 of a turbine guide vane 200 according to an embodiment of the present invention includes a positioning member 10 and a detection ruler 20 .

[0052] Specifically, the turbine guide vane 200 comprises a coaxially arranged inner ring 201 and outer ring 202. A plurality of blades 203 are disposed circumferentially between the inner and outer rings 201 and 202. Adjacent blades 203 cooperate with the inner and outer rings 201 and 202 to define a throat 204. A positioning member 10 is provided with a positioning guide arc 11 that cooperates with at least one of the inner and outer rings 201 and 202. The positioning member 10 comprises a positioning reference surface 121 and a positioning guide surface 141. The positioning reference surface 121 and the positioning guide surface 141 cooperate to define a guide space 15. When the positioning member 10 is positioned and engaged with the turbine guide vane 200, the guide space 15 corresponds to the position of the throat 204, and the direction of the guide space is consistent with the throat direction. Furthermore, the inclined surface of the upper wall of the positioning guide surface 141 extends obliquely toward the throat 204. The measuring ruler 20 cooperates with the positioning member 10 to detect the width of the throat 204. Along its length, the measuring ruler 20 gradually increases or decreases in width, and at least one end of the measuring ruler 20 is smaller than the rest of the width. The measuring ruler 20 is inserted into the throat 204 along the inclined extension direction of the positioning guide surface 141. The measuring ruler 20 cooperates with the throat 204 along the guide space 15. The width of the measuring ruler 20 at the position where it is stuck in the throat 204 is the throat width.

[0053] When the positioning guide arch 11 is positioned in conjunction with the inner ring 201, the horizontal distance from the positioning reference surface 121 to the positioning guide arch 11 is equal to the radial distance from the inner ring 201 to the section to be measured in the throat 204. As shown in Figure 1(a), the horizontal distance from the positioning reference surface 121 to the positioning guide arch 11 is equal to the radial distance H from the inner ring to the section to be measured in the throat V.

[0054] In other words, the throat detection assembly 100 according to the embodiment of the present application can be used to detect the width of the throat 204 of the turbine guide vane 200, so as to determine whether the turbine guide vane 200 meets the product design requirements. The throat detection assembly 100 mainly comprises a positioning member 10 which can be positioned on the turbine guide vane 200, and a detection ruler 20 which cooperates with the positioning member 10 to detect the width of the throat 204 of the turbine guide vane 200. Wherein, the turbine guide vane 200 is a central symmetric structure, the blades 203 are fixed between the inner ring 201 and the outer ring 202 which are coaxially arranged, the adjacent two blades 203 form the throat 204 for gas flow, and the throat 204 is in a spiral shape. The distance between the adjacent two blades 203 is the width of the throat 204, as shown in Fig. 1(b), the width of the throat 204 of the turbine guide vane 200 is w.

[0055] The positioning member 10 is provided with a positioning guide arc 11 which cooperates with at least one of the inner ring 201 or the outer ring 202, that is, the positioning guide arc 11 can only cooperate with the inner ring 201 or only cooperate with the outer ring 202, so as to realize the positioning of the positioning member 10 on the turbine guide vane 200. The positioning guide arc 11 can be a step structure which abuts against at least one of the inner ring 201 or the outer ring 202, or can be a groove structure into which at least one of the inner ring 201 or the outer ring 202 is inserted.

[0056] The positioning member 10 has a positioning reference surface 121 and a positioning guide surface 141, wherein the positioning reference surface 121 is used to cooperate with the detection ruler 20 to define the cross section measured when the detection ruler 20 is inserted into the throat 204. When the positioning member 10 is positioned under the cooperation of the positioning guide arc 11 and the turbine guide vane 200, the positioning reference surface 121 is perpendicular to the radial extension line of the turbine guide vane 200. It should be noted that the width of the throat 204 refers to the width of the narrowest cross section of the throat 204, and the cross section is also perpendicular to the radial extension line of the turbine guide vane 200.

[0057] When the positioning member 10 is positioned under the cooperation of the positioning guide arc 11 and the turbine guide vane 200, the inclined surface of the upper wall of the positioning guide surface 141 extends towards the direction of the throat 204, so as to define the angle of the detection ruler 20 when inserted into the throat 204.

[0058] The positioning reference surface 121 and the positioning guide surface 141 cooperate to define a guide space 15. Specifically, the positioning reference surface 121 and the positioning guide surface 141 are connected and form an angle. The space semi-enclosed by the positioning reference surface 121 and the positioning guide surface 141 is the guide space 15. When the positioning member 10 is positioned with the positioning guide arc 11 and the turbine guide 200, the position of the guide space 15 corresponds to the position of the throat 204. Specifically, the guide space 15 is connected to the throat 204 to be measured, and the two connected spaces are large enough to accommodate the insertion of the measuring ruler 20.

[0059] The detecting ruler 20 needs to cooperate with the positioning member 10 when measuring the width of the throat 204. The detecting ruler 20 is in the shape of an elongated strip. In the longitudinal direction of the detecting ruler 20, the width of the detecting ruler 20 gradually increases or decreases, and the width of at least one end of the detecting ruler is smaller than the width of the rest of the ruler. For example, the detecting ruler 20 is in the shape of a triangular prism as a whole, with one end of the detecting ruler 20 having a smaller width and the other end having a larger width, and the width of the detecting ruler 20 gradually increases from one end to the other end; the detecting ruler 20 can also be in the shape of a shuttle, with the two ends of the detecting ruler 20 having a smaller width and the middle having a larger width, and the width of the detecting ruler 20 gradually increases from the two ends to the middle. In addition, the detecting ruler 20 can also be in other shapes, as long as one end is gradually increased in width from a small width when extending inward from the end, the requirements can be met. During the inspection, the end of the detecting ruler 20 with a smaller width needs to be inserted into the throat 204 along the positioning guide surface 141 for measurement.

[0060] It should be noted that a scale may be provided on the measuring ruler 20 so that a value can be directly read as the measured width of the throat 204 during the process of inserting the measuring ruler 20 into the throat 204 for testing. Alternatively, a scale may be provided on the measuring ruler 20 so that a value can be directly read as the measured width of the throat 204 during the process of inserting the measuring ruler 20 into the throat 204. Alternatively, a scale may be provided on the measuring ruler 20 so that a mark is made at the indicated position where the measuring ruler 20 is stopped by the blade 203 after the measuring ruler 20 is inserted into the throat 204. Then, after the measuring ruler 20 is removed, the width at the marked position is measured using other measuring instruments such as a micrometer, and this is used as the measured width of the throat 204.

[0061] Thus, according to the throat detection assembly 100 of the turbine guide vane 200 of the present application, the positioning member 10 is positioned on the turbine guide vane 200 by the positioning guide arc 11 on the positioning member 10, and the positioning reference surface 121 and the positioning guide surface 141 on the positioning member 10 are then used to guide the detection ruler 20 through the guide space 15 defined by these two surfaces and inserted into the throat 204. The positioning reference surface 121 defines the cross-sectional position of the throat 204 to be detected when the detection ruler 20 is inserted into the throat 204. The inclined surface of the upper wall of the positioning guide surface 141 extends toward the throat 204, defining the inclination angle of the detection ruler 20 when inserted into the throat 204, thereby ensuring detection accuracy. Because the width of the detection ruler gradually increases or decreases, and at least one end is smaller than the width of the rest of the portion, when the detection ruler 20 is continuously extended into the throat 204 until the detection ruler 20 is stopped by the blade 203, the width of the detection ruler 20 at the point where the detection ruler 20 is stopped is the width of the throat 204. During the detection process, each throat 204 only needs to be inserted with the detection ruler 20 once to obtain the width of the throat 204. The width is compared with the set requirements to determine whether it meets the requirements, and the detection is completed. Under the premise of meeting the accuracy, the operation is simpler and faster, and the detection efficiency is improved.

[0062] According to one embodiment of the present application, the positioning member 10 is block-shaped, and the positioning guide arc 11 is a protrusion protruding from the first side of the positioning member 10 . The positioning guide arc 11 stops at the inner ring 201 or the outer ring 202 to position the positioning member 10 .

[0063] Specifically, the positioning member 10 is a positioning block having multiple surfaces. The positioning guide arc 11 is a protrusion protruding outward from one surface of the positioning member 10. This protrusion, together with the surface of the positioning member 10 provided with the protrusion, forms a stepped structure. The protrusion can abut against at least one of the inner ring 201 or the outer ring 202. It should be noted that the protrusion can abut against the inner or outer wall of the inner ring 201, the inner or outer wall of the outer ring 202, or the outer wall of both the inner ring 201 and the inner wall of the outer ring 202. In addition, to better position the positioning member 10 and reduce detection errors, the shape of the protrusion can match the shape of the corresponding wall of the inner ring 201 or outer ring 202 against which it abuts.

[0064] The positioning guide arc 11 is set as a protrusion with a simple structure. During actual operation, the positioning guide arc 11 can be quickly stopped on the inner ring 201 or the outer ring 202 of the turbine guide 200 to achieve the positioning of the positioning member 10. The operation is convenient and fast, and the detection efficiency can be effectively improved.

[0065] According to one embodiment of the present application, the positioning guide arc 11 has an arc-shaped positioning surface 111 having a curvature radius consistent with the inner ring 201 or the outer ring 202 , and the positioning surface 111 stops at the inner ring 201 or the outer ring 202 .

[0066] In other words, the surface of the protrusion of the positioning guide arc 11 that stops on the inner ring 201 or the outer ring 202 is the positioning surface, which is an arc-shaped positioning surface 111 that can completely fit with the stopped surface of the inner ring 201 or the outer ring 202.

[0067] Specifically, the positioning guide arc 11 abutting against the inner ring 201 is used as an example for explanation. The lower end surface of the turbine guide 200 when placed horizontally is the bottom surface of the turbine guide 200, and the upper end surface is the top surface of the turbine guide 200. Similarly, the lower end surface of the positioning member 10 after positioning on the turbine guide 200 is the bottom surface of the positioning member 10, and the upper end surface is the top surface of the positioning member 10. Figure 4 and Figure 6 As shown, positioning guide arc 11 is provided on the bottom surface of positioning member 10 and is a protrusion protruding from this bottom surface. The side surface where the protrusion intersects the bottom surface of positioning member 10 forms an arc-shaped positioning surface 111, which can abut against the outer wall of the inner ring. The radius of curvature of positioning surface 111 is equal to the radius of curvature of the outer circumference of inner ring 201. In other words, positioning surface 111 can completely fit against the outer wall of inner ring 201 to achieve the positioning of positioning member 10.

[0068] By setting the radius of curvature of the positioning surface 111 to be consistent with the radius of curvature of the inner ring 201 or outer ring 202 being stopped, the positioning member 10 can be positioned by utilizing the positioning surface to abut against the wall surface of the inner ring 201 or outer ring 202, while the bottom surface of the positioning member 10 abuts against the end surface of the inner ring 201 or outer ring 202. Positioning of the positioning member 10 is achieved through the limiting of these two surfaces, resulting in a simple structure and ease of manufacture. Furthermore, during use, no additional bolts or latches are required for positioning and fixing, and the positioning member 10 can be easily slid along the inner ring 201 or outer ring 202 to quickly and sequentially detect the widths of multiple throats 204, making operation more convenient and further improving detection efficiency.

[0069] According to one embodiment of the present application, Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the positioning member 10 includes a first block 12 and a second block 13. The first block 12 extends along a first direction, which can be the circumference of the turbine guide vane 200. The bottom surface of the first block 12 is provided with a positioning guide arc 11. One side wall of the first block 12 is formed as a positioning reference surface 121. The second block 13 is provided at one end of the positioning reference surface 121. The other end of the positioning reference surface 121 is provided with a guide portion 14, and the guide portion 14 has a positioning guide surface 141.

[0070] Specifically, the following description uses the positioning member 10 positioned on the turbine guide vane 200 as an example. The positioning member 10 is a one-piece structure, with both the bottom and top surfaces being flat. The first direction may be the circumferential direction of the turbine guide vane 200. That is, when the positioning member 10 is positioned on the turbine guide vane 200, the first block 12 extends along the circumference of the turbine guide vane 200.

[0071] The first block 12 is in the shape of an elongated strip, having a bottom surface, a top surface, two end surfaces, and two side surfaces. The two end surfaces of the first block 12 refer to the two surfaces of the first block 12 in the circumferential direction of the turbine guide vane 200, and the two side surfaces of the first block 12 refer to the two surfaces of the first block 12 in the radial direction of the turbine guide vane 200. The positioning guide arc 11 is provided on the bottom surface of the first block 12. The positioning reference surface 121 is a side wall surface of the first block 12 away from the center of the turbine guide vane 200, and is in the shape of an elongated strip, with its two long sides intersecting at the top and bottom surfaces of the first block 12, respectively.

[0072] One end of the positioning reference surface 121 is the second block 13, and the other end is the guide portion 14. Specifically, the second block 13 is connected to the side of the first block 12 away from the center of the turbine guide vane 200, and as shown in FIG. Figure 3 As shown, the second block 13 is located on the right side of the positioning reference surface 121, and the guide portion 14 is on the left side of the positioning reference surface 121. The guide portion 14 is provided on the first block 12 and is a convex portion protruding vertically outward from the positioning reference surface 121. The positioning guide surface 141 is provided on the guide portion 14.

[0073] When the positioning member 10 is positioned on the turbine guide vane 200 , the bottom surface of the first block 12 is supported by the end surface of the inner ring 201 , and the bottom surface of the second block 13 is supported by the end surface of the outer ring 202 to ensure the stability of the positioning member 10 positioned on the turbine guide vane 200 .

[0074] Preferably, the positioning member 10 is made of a wear-resistant material to reduce the loss of accuracy caused by wear of the positioning member 10 during long-term use.

[0075] Preferably, the second block 13 has a through hole to reduce the weight of the positioning member 10 and also reduce the production cost; a rope can also be passed through the second block 13 for storage and use.

[0076] like Figure 5As shown, the positioning member 10, formed by the combination of the first block 12 and the second block 13, has a simple structure, and the integral structure is also easy to manufacture. It should be noted that the positioning guide arc 11 used for positioning of the positioning member 10, as well as the positioning reference surface 121 and positioning guide surface 141 used for mating with the detection ruler 20, must have high precision requirements to improve measurement accuracy and thereby reduce detection errors. The remaining surface precision requirements are lower to simplify the manufacturing process.

[0077] According to some other embodiments of the present application, the positioning reference surface 121 and the positioning guide surface 141 are both planes, and the positioning guide surface 141 is perpendicular to the positioning reference surface 121 .

[0078] like Figure 3 As shown, the positioning reference surface 121 is a long, flat surface provided on the first block 12, and the positioning guide surface 141 is a flat surface provided on the guide portion 14. When the positioning guide surface 141 is perpendicular to the positioning reference surface 121, the detection ruler 20 can mate with the positioning reference surface 121 and the positioning guide surface 141 via two mutually perpendicular surfaces. This allows for greater flexibility in the configuration of the detection ruler 20, allowing detection rulers 20 of various shapes to meet various requirements. Furthermore, the two mutually perpendicular surfaces facilitate manufacturing and improve detection accuracy.

[0079] According to one embodiment of the present application, the slope of the upper wall of the positioning guide surface 141 relative to the horizontal direction is equal to the slope of the axis of the throat 204 relative to the horizontal direction.

[0080] It should be noted that the axial direction of the throat 204 refers to the extending direction of the axis of the throat 204. The slope of the positioning guide surface 141 relative to the horizontal direction is equal to the slope of the axial direction of the throat 204 relative to the horizontal direction. This means that when the positioning member 10 is positioned on the turbine guide vane 200, the angle between the positioning guide surface 141 and one end surface of the turbine guide vane 200 is equal to the angle between the axis of the throat 204 and one end surface of the turbine guide vane 200.

[0081] By setting the slope of the inclined surface of the upper wall of the positioning guide surface 141 relative to the horizontal direction to be equal to the slope of the axis of the throat 204 relative to the horizontal direction, it can be ensured that the detection ruler 20 is inserted into the throat 204 in the correct direction during measurement, ensuring the accuracy of the detection and avoiding the situation where the detection ruler 20 is misaligned with the axis of the throat 204 by a certain angle when inserted into the throat 204, resulting in the measured reading being incorrect from the actual width of the throat 204.

[0082] According to some other embodiments of the present application, the detection ruler 20 is provided with scales 21 spaced apart along its length, the scales 21 range from 5.7 mm to 6.4 mm, and the difference between adjacent scales 21 is 0.1 mm.

[0083] The entirety of the ruler 20 can be a three-dimensional structure with a certain thickness, or a long, flat structure. Regardless of the configuration, the ruler 20 is provided with scale marks 21 spaced along the length of the ruler 20 and corresponding to the width of each location on the ruler 20. In other words, the number marked on the scale mark 21 of the ruler 20 represents the actual width at that location. If the width of the ruler 20 varies uniformly along its length, the scale marks 21 will also be evenly spaced along the ruler 20. In this case, locations on the ruler 20 without scale marks 21 can be estimated based on the values ​​of adjacent marked scale marks 21.

[0084] like Figure 7 As shown, the scale 21 ranges from 5.7mm to 6.4mm, and the difference between two adjacent scales 21 is 0.1mm. During measurement, the second decimal place can be read based on the estimated reading, meeting the measurement accuracy requirements. Since it is difficult to ensure that the width of the throat 204 is exactly equal to the designed width during the production process, a tolerance range is set to determine whether the turbine guide 200 is qualified. For example, taking the designed width w = 6.07mm of the throat 204 of the turbine guide 200 as an example, it is stipulated that the width of the throat 204 is qualified between 6.00mm and 6.15mm. Then, based on whether the reading of the measuring ruler 20 falls between 6.00mm and 6.15mm during measurement, it can be quickly determined whether the throat 204 is qualified, thereby improving detection efficiency.

[0085] Preferably, the detection ruler 20 is made of a wear-resistant material. Further, the wear-resistant material may be wear-resistant steel, so as to reduce the wear of the detection ruler 20 during repeated use, so that the detection ruler 20 can still maintain a high accuracy.

[0086] According to one embodiment of the present application, the detection ruler 20 has a detection reference surface 22 and a detection guide surface 23 extending along its length. The detection reference surface 22 cooperates with the positioning reference surface 121, and the detection guide surface 23 cooperates with the positioning guide surface 141, so that the detection ruler 20 is inserted into the throat 204 along the extension direction of the upper wall slope of the positioning guide surface 141.

[0087] In other words, the detection ruler 20 mates with the corresponding detection reference surface 22 and detection guide surface 23 via two surfaces extending along its length. Specifically, the detection ruler 20 has the detection reference surface 22 and the detection guide surface 23, and both extend along the length of the detection ruler 20. If the positioning reference surface 121 and the positioning guide surface 141 are perpendicular to each other, then the detection reference surface 22 and the detection guide surface 23 will also be perpendicular to each other, achieving their respective coordination.

[0088] like Figure 7 and Figure 8As shown, the detection ruler 20 is not a long strip-shaped flat structure as a whole, but a three-dimensional structure with a certain thickness, and its cross section is approximately trapezoidal. The wider side of the trapezoid is the detection reference surface 22 of the detection ruler 20, which is used to cooperate with the positioning reference surface 121. The detection reference surface 22 is shuttle-shaped, and the width gradually increases from both ends to the middle, and the scale 21 is arranged on the detection reference surface 22. The side of the detection ruler 20 perpendicular to the detection reference surface 22 is the detection guide surface 23, and the width of the detection guide surface 23 is smaller.

[0089] In addition, the detection reference surface 22 cooperates with the positioning reference surface 121, and the detection guide surface 23 cooperates with the positioning guide surface 141, which means that when the detection ruler 20 is inserted into the throat 204 along the extension direction of the positioning guide surface 141, the detection reference surface 22 needs to be tightly attached to the positioning reference surface 121, and the detection guide surface 23 needs to be tightly attached to the positioning guide surface 141, so as to ensure the accuracy of the measured width of the throat 204.

[0090] The cooperation between the detection ruler 20 and the positioning member 10 is realized by the cooperation of the two surfaces respectively, which can improve the stability of the detection ruler 20 during the process of extending into the throat 204 along the positioning guide surface 141 compared with the cooperation between the edge of the detection ruler 20 and the surface of the positioning member 10, and further improve the detection accuracy.

[0091] According to some other embodiments of the present application, the width of the middle part of the detection ruler 20 is greater than the width of both ends, and the width of the detection ruler 20 gradually decreases from the middle part to both ends.

[0092] That is, the detection ruler 20 is shuttle-shaped, the width of both ends is smaller, the width of the middle part is larger, and the width of the detection ruler 20 gradually decreases from the middle part to both ends. Therefore, both ends of the detection ruler 20 can be used for insertion into the throat 204 for detection. As Figure 7 As shown, the scales 21 at both ends of the detection ruler 20 are symmetrically distributed, and the scale 21 is the embodiment of the width at this position, that is, both ends of the detection ruler 20 are symmetrically structured. During the detection process, one end can be arbitrarily selected and inserted into the throat 204 for detection.

[0093] The symmetric structure of the detection ruler 20 can facilitate the detection of the detection staff, and the detection staff does not need to judge which end is the smaller width end and then insert, but can arbitrarily select one end to insert, which is more convenient and efficient in operation.

[0094] Preferably, the width of the detection ruler 20 uniformly changes from the middle to both ends. Since the width uniformly changes, the positions between adjacent scales 21 can be quickly estimated when reading the readings on the detection ruler 20, thereby improving the measurement accuracy and efficiency.

[0095] Preferably, a through hole is provided in the middle of the detection ruler 20, which can not only reduce the material used for the detection ruler and save production costs, but also facilitate the storage of the detection ruler 20. The through hole can be used for convenient hanging, avoiding the detection ruler 20 from colliding with other objects when not in use and causing wear, thereby affecting the measurement accuracy.

[0096] According to one embodiment of the present application, a method for detecting the throat of a turbine guide vane 200 includes the following steps:

[0097] Position the positioning member 10 and the turbine guide vane 200 so that the guide space 15 corresponds to the position of the throat 204 to be inspected on the turbine guide vane 200;

[0098] Insert one end of the detection ruler 20 into the guide space 15, and make a part of the detection ruler 20 fit with the positioning reference surface 121, and the other part of the detection ruler 20 fit with the positioning guide surface 141;

[0099] Insert the detection ruler 20 into the throat 204 along the inclined direction of the positioning guide surface 141 until the detection ruler 20 is stuck by the blade 203;

[0100] Obtaining the stuck position of the detection ruler 20;

[0101] The size of the throat 204 is obtained according to the stuck position, and it is determined whether the throat 204 meets the set requirements.

[0102] Specifically, Figures 2 to 9 The throat detection component 100 is used to detect the width of the throat 204 as an example to illustrate the throat detection process.

[0103] The positioning guide arc 11 of the positioning member 10 is placed against the inner ring 201 of the turbine guide vane 200, so that the arc-shaped positioning surface 111 of the positioning guide arc 11 is in close contact with the outer wall of the inner ring 201. The positioning member 10 is then slid along the inner ring 201 until the guide space 15 is aligned with the position of the throat 204 to be inspected on the turbine guide vane 200.

[0104] The detecting ruler 20 is a symmetrical structure. One end of the detecting ruler 20 is optionally inserted into the guide space 15. During the entire insertion process, the detecting reference surface 22 of the detecting ruler 20 is in close contact with the positioning reference surface 121 of the positioning member 10, and the detecting guide surface 23 of the detecting ruler 20 is in close contact with the positioning guide surface 141 of the positioning member 10.

[0105] Then, the detection ruler 20 is inserted into the throat 204 along the inclined direction of the positioning guide surface 141 until the detection ruler 20 is stopped by the blade 203. That is, the detection ruler 20 is inserted into the throat 204 along the inclined direction of the positioning guide surface 141 until it cannot go any deeper.

[0106] At this time, the scale 21 of the measuring ruler 20 indicated by the stop point of the blade 203 is the measured width of the throat 204. Figure 9 As shown, the position where the upper end of the blade 203 on the left side of the throat 204 abuts against the detection ruler 20 is the insertion position of the detection ruler 20.

[0107] According to the position where the upper end of the blade 203 stops on the measuring ruler 20 and the value of the adjacent scale 21, it can be estimated that the currently measured width of the throat 204 is 5.79mm. The design width of the throat 204 of the turbine guide vane 200 is 6.07mm. If the qualified width range is set to 6.00mm to 6.15mm, then Figure 9 The measured width of 5.79 mm is significantly smaller than 6.00 mm, so the throat 204 does not meet the set requirements.

[0108] After measuring the width of one throat 204 to be inspected, the positioning member 10 can be slid along the circumference of the inner ring 201 while maintaining the positioning surface 111 in contact with the outer wall of the inner ring 201, so that the guide space 15 aligns with the position of another throat 204 to be inspected. The above-mentioned insertion and inspection process of the inspection ruler 20 is repeated to complete the inspection. In other words, all throats 204 on a turbine guide vane 200 can be inspected by sliding the positioning member 10 in conjunction with the inspection ruler 20, which is convenient and highly efficient.

[0109] It should be noted that if the scale 21 is placed on the detection reference surface 22 that abuts the positioning reference surface 121, direct reading may be inconvenient during measurement. In this case, a mark can be engraved at the stop of the blade 203, and the detection ruler 20 can be removed from the throat 204 to read the scale 21 on the detection ruler 20 based on the engraved mark. Alternatively, the positioning member can be configured as a transparent structure to allow readings to be taken directly when the detection ruler 20 is in the throat 204. Preferably, the scale 21 can be placed on the surface opposite to the detection reference surface 22 or on the adjacent non-detection guide surface 23, so that readings can be taken when the detection ruler 20 is in the throat 204, reducing the number of steps required.

[0110] Since the throat detection assembly 100 of the turbine guide vane 200 according to the above embodiment of the present application has the above technical effects, the throat detection method according to the embodiment of the present application also has corresponding technical effects, that is, while meeting the accuracy requirements, the operation is made simpler and faster, thereby improving the detection efficiency.

[0111] While certain embodiments of the application have been described by way of example, it should be appreciated that modifications can be made by those skilled in the art without departing from the scope and spirit of the application.

Claims

1. A throat detection assembly for a turbine guide vane, characterized in that: The turbine guide vane includes a coaxially arranged inner ring and outer ring. The throat is a passage between blades uniformly arranged circumferentially between the inner and outer rings. The detection assembly includes a positioning member and a detection ruler. The positioning member includes a positioning guide arc provided on a bottom surface and a guide space for guiding the movement of the detection ruler. The positioning guide arc is slidably engaged with the inner ring or the outer ring. The guide space guides in the same direction as the throat. The detection ruler engages with the throat along the guide space. The width of the position where the detection ruler is stuck in the throat is the width of the throat. The guide space includes a longitudinally arranged positioning reference surface and a positioning guide surface with an inclined surface on the upper wall, and the direction of the inclined surface is consistent with the throat direction; Wherein, when the positioning guide arc is arranged in cooperation with the inner ring, the horizontal distance from the positioning reference plane to the positioning guide arc is equal to the radial distance from the inner ring to the throat section to be measured; Wherein, the positioning guide arc has an arc-shaped positioning groove having a curvature radius consistent with that of the inner ring or the outer ring; In which, the positioning member includes a first block and a second block, the bottom surface of the first block is provided with the positioning guide arc, the side wall of the first block is the positioning reference surface, the positioning guide surface of the second block is connected to the positioning reference surface at an angle to form a guide space, and the upper wall of the positioning guide surface is provided with an inclined surface consistent with the direction of the throat.

2. The throat detection assembly of the turbine guide vane according to claim 1, characterized in that: The positioning reference surface and the positioning guide surface are both vertically arranged planes.

3. The throat detection assembly of the turbine guide vane according to claim 1, characterized in that: The width of the detection ruler gradually increases or decreases along the length direction of the detection ruler, and the width of at least one end of the detection ruler is smaller than the width of the remaining parts.

4. The throat detection assembly of the turbine guide vane according to claim 3, characterized in that: The detection ruler has a detection reference surface and a detection guide surface extending along the length direction thereof. The detection reference surface cooperates with the positioning reference surface, and the detection guide surface cooperates with the inclined surface of the upper wall of the positioning guide surface.

5. A method for detecting the throat of a turbine guide vane, characterized in that: The detection assembly according to any one of claims 1 to 4 is used to position and cooperate with the turbine guide, comprising the following steps: Step 1, slidably engaging the positioning guide arc at the bottom of the positioning member with the inner ring or outer ring of the turbine guide; Step 2: insert the detection ruler into the guide space and move it along the throat until it is stuck in the throat. The width of the detection ruler is the width of the throat.

6. The method for detecting the throat of a turbine guide vane according to claim 5, characterized in that: The step 2 comprises the following steps: Insert one end of the detection ruler into the guide space, and make the detection reference surface of the detection ruler fit with the positioning reference surface, and the detection guide surface of the detection ruler fit with the inclined surface of the upper wall of the positioning guide surface; Inserting the detection ruler into the throat along the inclined direction of the positioning guide surface until the detection ruler is stopped by the blade; The stop position of the detection ruler is obtained; the size of the throat is obtained according to the stop position, and whether the throat meets the set requirements is determined.

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