A method of adjusting turbine guide vane area
By dividing the turbine guide vane installation angle into three types—upper, middle, and lower—and designing corresponding clamping components, the exhaust area of the turbine guide vane can be adjusted, thus solving the problem of difficulty in controlling the exhaust area during assembly and improving assembly efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHENGDU ENGINE GROUP
- Filing Date
- 2024-05-15
- Publication Date
- 2026-06-19
Smart Images
Figure CN118321861B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of turbine blade technology, and more specifically to a method for adjusting the exhaust area of a turbine guide vane. Background Technology
[0002] The turbine guide vane of an aero-engine is assembled from turbine guide vanes, inner / outer mounting rings, pins, and other parts. The oblique cut of the turbine guide vane's exhaust edge represents a complex three-dimensional flow of gas. The exhaust area of the turbine guide vane reflects the gas flow capacity of the inter-blade passage. The size of the turbine guide vane's exhaust area directly affects important parameters of the aero-engine, such as thrust, speed, and fuel consumption. Therefore, assembling the turbine guide vane exhaust within the acceptable range is crucial. The guide vanes of the turbine guide vane consist of airfoils and upper and lower edge plates. The guide vane edge plates are machined to form the turbine guide vane. Because the airfoils and the inner flow channel surfaces of the edge plates are cast surfaces with large tolerances, the exhaust area of the turbine guide vane fluctuates significantly, easily exceeding the design requirements. Adjustments are difficult if the exhaust area is too large or too small during assembly, usually requiring the selection and reassembly of new blades, which affects assembly efficiency. Summary of the Invention
[0003] In view of this, this specification provides a method for adjusting the exhaust area of a turbine guide vane, in order to adjust the exhaust area of the turbine guide vane and improve assembly efficiency.
[0004] The embodiments in this specification provide the following technical solutions:
[0005] A method for adjusting the exhaust area of a turbine guide vane includes:
[0006] Obtain the preset installation angle and preset difference angle of the turbine guide vane. Take the sum of the preset installation angle and the preset difference angle as the upper difference angle, take the preset installation angle as the middle difference angle, and take the difference between the preset installation angle and the preset difference angle as the lower difference angle. Based on the preset difference angle, process the corresponding clamping components.
[0007] After fixing the turbine guide vane blank to the clamping assembly, the turbine guide vane blank is processed to produce upper differential blades corresponding to the upper differential angle, middle differential blades corresponding to the middle differential angle, and lower differential blades corresponding to the lower differential angle.
[0008] The turbine guide vane is assembled using upper differential blades, middle differential blades, and lower differential blades. The exhaust area of the turbine guide vane is adjusted by changing the proportion of the upper differential blades, middle differential blades, and lower differential blades in the total number of blades in the turbine guide vane.
[0009] Furthermore, by adjusting the proportions of the upper differential pressure blade, middle differential pressure blade, and lower differential pressure blade in the total blades of the turbine guide vane, the exhaust area of the turbine guide vane is adjusted, including:
[0010] Using a differential blade assembly for the turbine guide vane, test the exhaust area of the turbine guide vane, and perform the following operations until the exhaust area is within the range of the standard exhaust area:
[0011] If the exhaust area is larger than the standard exhaust area, replace the middle differential blade with the upper differential blade;
[0012] If the exhaust area is smaller than the standard exhaust area, replace the intermediate differential blade with the lower differential blade.
[0013] Furthermore, by adjusting the proportions of the upper differential pressure blade, middle differential pressure blade, and lower differential pressure blade in the total blades of the turbine guide vane, the exhaust area of the turbine guide vane is adjusted, including:
[0014] The turbine guide vane is assembled using a mixture of upper and lower differential blades. The exhaust area of the turbine guide vane is tested, and the following steps are performed until the exhaust area is within the range of the standard exhaust area:
[0015] If the exhaust area is larger than the standard exhaust area, replace the lower differential blade with the middle differential blade;
[0016] If the exhaust area is smaller than the standard exhaust area, replace the upper differential blade with the middle differential blade.
[0017] Furthermore, the clamping assembly includes:
[0018] The plate base is located at the bottom of the clamping assembly, and the turbine guide vane blank is fixed on the plate base.
[0019] The base plate includes an upper surface and a lower surface, and the upper and lower surfaces have an included angle.
[0020] Furthermore, based on the preset difference angle, the corresponding clamping components are processed, including:
[0021] Three types of clamping components were manufactured separately, and the clamping component with a base angle of zero degrees was used as the clamping component corresponding to the mid-range angle.
[0022] The clamping component with a base angle of a preset difference angle is used as the clamping component corresponding to the upper difference angle;
[0023] The clamping component with a base angle of negative preset difference is used as the clamping component corresponding to the lower difference angle.
[0024] Furthermore, the clamping assembly also includes:
[0025] Fixture base and stop bar;
[0026] The stop bar is set on the upper surface of the plate base. The fixture base is positioned with the plate base by the stop bar. When machining the turbine guide blade blank, the turbine guide blade blank is clamped onto the fixture base.
[0027] Furthermore, after fixing the turbine guide vane blank to the clamping assembly, the turbine guide vane blank is processed, including:
[0028] Place the plate base and fixture base on the surface grinder;
[0029] After clamping the plate base and fixture body to the surface grinder, the turbine guide vane blank is clamped onto the fixture body;
[0030] Grinding the back radial surface of the turbine guide vane blank;
[0031] After the back radial surface is ground, the back radial surface of the turbine guide vane blank is used as the precision reference surface for positioning, and the basin radial surface of the turbine guide vane blank is ground.
[0032] Furthermore, clamping the turbine guide vane blank onto the fixture base also includes:
[0033] Before clamping the turbine guide vane blank onto the fixture base, the parallelism between the reference surface of the fixture base and the spindle of the surface grinder is less than or equal to 0.02 mm.
[0034] Furthermore, clamping the turbine guide vane blank onto the fixture base also includes:
[0035] After the turbine guide vane blank is clamped onto the fixture base, the gap between the turbine guide vane blank and the fixture base at the positioning point of the fixture base is less than or equal to 0.02 mm.
[0036] Furthermore, clamping the turbine guide vane blank onto the fixture base also includes:
[0037] The turbine guide vane blank is positioned and clamped using the six-point positioning principle.
[0038] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:
[0039] The turbine guide vanes are divided into three installation angles: large, medium, and small, and corresponding angle plate bases are designed. A fixture base is used to hold the vanes, and three sets of vanes with different installation angles are machined by changing the three angle plate bases. When assembling the turbine guide vane, based on the dimensional trends of the flow channel surface and airfoil profile of the vane edge plate, vanes with corresponding installation angle trends are selected for assembly or mixed assembly to prevent the exhaust area from being too large or too small, ensuring that the exhaust area of the turbine guide vane is within the acceptable range and improving assembly efficiency. Attached Figure Description
[0040] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0041] Figure 1 This is a schematic diagram of a method for adjusting the exhaust area of a turbine guide vane according to an embodiment of the present invention;
[0042] Figure 2 This is a cross-sectional view of a turbine guide vane according to an embodiment of the present invention;
[0043] Figure 3 This is a schematic diagram of the blade profile and flow channel surface according to an embodiment of the present invention;
[0044] Figure 4 This is a schematic diagram of the back radial surface and the basin radial surface according to an embodiment of the present invention;
[0045] Figure 5 This is a schematic diagram showing the relationship between the installation angle and the exhaust area in an embodiment of the present invention;
[0046] Figure 6 This is a side view of the base plate of an embodiment of the present invention;
[0047] Figure 7 This is a top view of the plate base and the stop bar according to an embodiment of the present invention;
[0048] Figure 8 This is a top view of the clamping assembly according to an embodiment of the present invention.
[0049] The attached figures are labeled as follows: 1. Base plate; 101. Upper surface of the base; 102. Lower surface of the base; 2. Fixture base; 3. Stop bar. Detailed Implementation
[0050] The embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0051] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0052] The exhaust area of a turbine guide vane is a relatively independent window area enclosed by the profiles of each pair of adjacent blades and the flow channels within the upper and lower edge plates. The sum of the window areas of the entire circumference of the turbine guide vane is the exhaust area of the turbine guide vane. Many factors influence the size of the exhaust area of the turbine guide vane, including the profile of the flow channel surface within the edge plates, the profile of the airfoil, and the size of the installation angle. Since both the flow channel surface within the edge plates and the airfoil are cast without machining, the casting tolerances are large, making it difficult to control the profile. Therefore, controlling the profile of the flow channel surface within the edge plates and the airfoil is quite challenging.
[0053] The exhaust area of the turbine guide vane is the sum of the areas of the individual windows assembled into a complete circle. The area of an individual window is the exhaust area of a window formed by two adjacent blades. The number of windows in the entire guide vane is equal to the number of blades assembled. Since the blades are individually cast, the surface tolerance of the blades is relatively large. Then, the large and small flanges are machined and randomly assembled. Therefore, the size of each window area is different. An important parameter of the engine is to control the exhaust area of the entire turbine guide vane within a certain range, that is, the sum of the areas of the individual windows in the guide vane is within a qualified range.
[0054] like Figure 2 As shown in the cross-sectional view of the turbine guide vane, the blade installation angle is the angle between the chord line of the blade profile and the engine axis. The engine axis coincides with the central axis of the guide vane, i.e., the central axis direction of the guide vane. The leading edge of the blade is the end that receives the airflow and should be thick and robust, while the trailing edge is the end through which the airflow passes and is thinner and weaker.
[0055] like Figure 3 As shown, the left side of the turbine guide vane is the inlet edge (also known as the leading edge), and the right side is the exhaust edge (also known as the trailing edge). The positions of the flow channel surfaces inside the small flange, the blade profile, and the large flange are respectively shown in the figures. Figure 3 As shown. The positions of the radial surface of the back of the large flange, the radial surface of the basin of the large flange, the radial surface of the back of the small flange, and the radial surface of the basin of the small flange are respectively as shown in the figure. Figure 4 As shown.
[0056] The exhaust area of a turbine guide vane is related to three factors: the profile of the blade, the channel length (i.e., the distance between the flow channels inside the large and small blades), and the blade mounting angle. The profile of the blade and the channel length are formed by casting and are not easy to control, while the mounting angle is formed during the machining process. Therefore, the exhaust area of an aero-engine guide vane can be adjusted by adjusting the mounting angle.
[0057] like Figure 5As shown, X and Y represent the X and Y axes of the coordinate system, respectively. The distance between points P and B is related to the size of the window area. Point P is the center point of the trailing edge of the blade (the trailing edge is a small semicircle), and point B is the point on the back of the adjacent blade closest to point P. When the blade's facet and back radial surfaces are machined using a base with degree markings to adjust the installation angle, the angular direction of the blade's facet and back radial surfaces changes. During assembly, the angle between the blade profile and the engine axis also changes (i.e., the blade installation angle changes), and the distance PB also changes. Currently, the axis of most engines coincides with the X-axis direction, and the blade installation angle is the angle between the blade profile chord and the X-axis, such as... Figure 5 In the diagram, the dashed line represents the clockwise rotation direction, where the installation angle increases and the exhaust area decreases; the solid line represents the counterclockwise rotation direction, where the installation angle decreases and the exhaust area increases. That is, the degree of the blade installation angle is inversely proportional to the exhaust area.
[0058] Point P is the center point of the exhaust edge of the blade, and point B is the closest point on the back of the adjacent blade to P. This is equivalent to drawing a circle centered at P, tangent to the back of the adjacent turbine guide vane at point B. The blade installation angle is the angle between the blade chord and the engine axis. When the turbine guide vane rotates clockwise, the blade installation angle increases, the position of the tangent point B changes to B′, and the length of PB′ becomes smaller than PB, resulting in a smaller exhaust window and thus a smaller exhaust area. The blade installation angle is formed after machining and can be precisely controlled through machining adjustments.
[0059] In this embodiment of the invention, a method for adjusting the exhaust area of a turbine guide vane is provided, such as... Figure 1 As shown, the method includes:
[0060] Step S101: Obtain the preset installation angle and preset difference angle of the turbine guide vane. Take the sum of the preset installation angle and the preset difference angle as the upper difference angle, take the preset installation angle as the middle difference angle, and take the difference between the preset installation angle and the preset difference angle as the lower difference angle. Based on the preset difference angle, process the corresponding clamping component.
[0061] Step S102: After fixing the turbine guide vane blank to the clamping assembly, process the turbine guide vane blank to make the upper differential blade corresponding to the upper differential angle, the middle differential blade corresponding to the middle differential angle, and the lower differential blade corresponding to the lower differential angle.
[0062] Step S103: Assemble the turbine guide vane using the upper differential blade, the middle differential blade, and the lower differential blade. Adjust the exhaust area of the turbine guide vane by adjusting the proportion of the upper differential blade, the middle differential blade, and the lower differential blade in the total number of blades of the turbine guide vane.
[0063] The exhaust area of the turbine guide vane is adjusted by modifying the proportions of the upper, middle, and lower differential pressure blades in the total number of blades in the turbine guide vane, including:
[0064] Assemble the turbine guide vane using intermediate differential blades, test the exhaust area of the turbine guide vane, and perform the following operations until the exhaust area is within the range of the standard exhaust area: if the exhaust area is greater than the standard exhaust area, replace the intermediate differential blade with the upper differential blade; if the exhaust area is less than the standard exhaust area, replace the intermediate differential blade with the lower differential blade.
[0065] The exhaust area of the turbine guide vane is adjusted by modifying the proportions of the upper, middle, and lower differential pressure blades in the total number of blades in the turbine guide vane, including:
[0066] The turbine guide vane is assembled using a mixture of upper and lower differential blades. The exhaust area of the turbine guide vane is tested, and the following operations are performed until the exhaust area is within the range of the standard exhaust area: if the exhaust area is greater than the standard exhaust area, the lower differential blade is replaced with a middle differential blade; if the exhaust area is less than the standard exhaust area, the upper differential blade is replaced with a middle differential blade.
[0067] Specifically, because the blade installation angle of a turbine guide vane is inversely proportional to the size of the exhaust area, when assembling a turbine guide vane, if the inner flow channel surface of the large flange plate, the inner flow channel surface of the small flange plate, and the air profile are too large, the exhaust area of the turbine guide vane tends to decrease. This can be achieved by using a lower differential blade with a lower installation angle, or a mixture of a middle differential blade with a middle installation angle and a lower differential blade with a lower installation angle to increase the exhaust area. Conversely, if the inner flow channel surface of the large flange plate, the inner flow channel surface of the small flange plate, and the air profile of the turbine guide vane are too small, the exhaust area of the turbine guide vane tends to increase. This can be achieved by using an upper differential blade with an upper installation angle, or a mixture of a middle differential blade with a middle installation angle and an upper differential blade with an upper installation angle to decrease the exhaust area. When the inner flow channel surface of the large flange plate, the inner flow channel surface of the small flange plate, and the air profile of the turbine guide vane are suitable, a middle differential blade with a middle installation angle can be used, or a mixture of an upper differential blade with an upper installation angle and a lower differential blade with a lower installation angle can be used.
[0068] Specifically, the standard exhaust area is the acceptable range of the exhaust area of the turbine guide vane.
[0069] In one embodiment, when the preset installation angle of the turbine guide vane is set to... When the preset difference angle is set to 20′ (0.333°), the upper difference angle is 30°20′, the middle difference angle is 30°, and the lower difference angle is 29°40′ (lower difference angle). According to the design of the three sets of corresponding angles of the plate base, the included angles between the upper surface 101 and the lower surface 102 of the plate base are 0.333° (upper difference angle), 0° (middle difference angle), and -0.333° (lower difference angle), respectively. In this design, the left side of the lower differential angle base 1 is higher than the right side, and the right side of the upper differential angle base 1 is higher than the left side. The fixture base clamps the blade at 30°. By using the fixture base with a 0.333° (upper differential angle) base, an upper differential blade with an installation angle of 30°20′ is machined. By using the fixture base with a 0° (middle differential angle) base, a middle differential blade with an installation angle of 30° is machined. By using the fixture base with a -0.333° (lower differential angle) base, a lower differential blade with an installation angle of 29°40′ is machined.
[0070] Based on the preset difference angle, the corresponding clamping components are machined, including:
[0071] Three types of clamping components were manufactured separately. The clamping component with a base angle of zero degrees was used as the clamping component corresponding to the middle difference angle; the clamping component with a base angle of a preset difference angle was used as the clamping component corresponding to the upper difference angle; and the clamping component with a base angle of a negative preset difference angle was used as the clamping component corresponding to the lower difference angle.
[0072] Specifically, using three types of plate bases 1, the turbine guide vanes are processed into three sets of vanes with different installation angles according to the range of installation angles.
[0073] like Figure 6 , Figure 7 , Figure 8 As shown, the clamping assembly includes: a plate base 1, a clamp base 2, and a stop bar 3.
[0074] The plate base 1 is located at the bottom of the clamping assembly, and the stop bar 3 is located on the upper surface of the plate base 1. The fixture base 2 is positioned with the plate base 1 by the stop bar 3. When the turbine guide blade blank is processed, the turbine guide blade blank is clamped onto the fixture base 2.
[0075] like Figure 6 As shown, the angle plate base 1 includes an upper surface 101 and a lower surface 102, with an included angle between them. When designing and manufacturing the angle plate base, the angle plate base 1 is machined using a preset difference angle, so that the angle between the upper surface 101 and the lower surface 102 is the sum of a preset installation angle and a preset difference angle, the preset installation angle, and the difference between the preset installation angle and the preset difference angle, respectively. Direction A (vertical direction) is the installation direction of the fixture base 2, and direction A is perpendicular to the upper surface 101 of the base.
[0076] After the turbine guide vane blank is fixed to the clamping assembly, the turbine guide vane blank is processed, including:
[0077] Place the base plate 1 and the fixture base 2 on the surface grinder. After clamping the base plate 1 and the fixture base 2 to the surface grinder, clamp the turbine guide vane blank onto the fixture base 2. Grind the back radial surface of the turbine guide vane blank. After grinding the back radial surface, use the back radial surface of the turbine guide vane blank as the precision datum surface for positioning, and grind the front radial surface of the turbine guide vane blank. Position the clamped turbine guide vane blank using the six-point positioning principle. Before clamping the turbine guide vane blank onto the fixture base, the parallelism between the datum surface of the fixture base and the spindle of the surface grinder is less than or equal to 0.02 mm. After clamping the turbine guide vane blank onto the fixture base, at the positioning point of the fixture base, the gap between the turbine guide vane blank and the fixture base is less than or equal to 0.02 mm. The clamping method resembles holding the middle blade shape with a fist, exposing both ends.
[0078] After the turbine guide vane and back radial surface are machined, the blade mounting angle can also be determined. Using three types of angle plate bases 1, the turbine guide vanes are machined into three groups of blades corresponding to different mounting angles (upper differential blade, middle differential blade, and lower differential blade) according to the range of mounting angle division.
[0079] In some embodiments, the base plate 1 with a base angle is processed in groups, consisting of three bases (with base angles of 0°, 0.333° (preset difference angle), and -0.333° (negative preset difference angle)). A large number of blades are processed into three groups of blades. During normal assembly, blades processed with the 0° base (30° blades) are used. When the exhaust area of the guide is affected by the surface profile of the casting and assembly process errors, and the exhaust area is too small, some of the assembled blades can be replaced with blades with a lower difference angle processed with the -0.333° base to increase the exhaust area. When the exhaust area of the guide is affected by the surface profile of the casting and assembly process errors, and the exhaust area is too large, some of the assembled blades can be replaced with blades with an upper difference angle processed with the 0.333° base to decrease the exhaust area.
[0080] Beneficial effects of the embodiments of the present invention:
[0081] The turbine guide vanes are divided into three installation angles: large, medium, and small, and corresponding angle plate bases are designed. Three sets of vanes with different installation angles are machined by using a fixture base and replacing the three angle plate bases. When assembling the turbine guide vane, based on the dimensional trends of the flow channel surface and airfoil profile of the blade rim, vanes with corresponding installation angle trends are selected for assembly or mixed assembly to prevent the exhaust area from being too large or too small, ensuring that the exhaust area of the turbine guide vane is within the acceptable range and meets design requirements. By machining and assembling the radial surface of the turbine guide vane rim according to installation angle groups, the problem of difficulty in adjusting the exhaust area of the turbine guide vane when it is too large or too small can be solved. Furthermore, grouping the blade installation angles avoids blind selection during assembly and improves assembly efficiency.
[0082] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this patent should still fall within the scope of this patent. Furthermore, the technical features, technical features and technical solutions, and technical solutions in this invention can be freely combined and used.
Claims
1. A method for adjusting the exhaust area of a turbine guide vane, characterized in that, include: Obtain the preset installation angle and preset difference angle of the turbine guide vane. Take the sum of the preset installation angle and the preset difference angle as the upper difference angle, take the preset installation angle as the middle difference angle, and take the difference between the preset installation angle and the preset difference angle as the lower difference angle. Based on the preset difference angle, process the corresponding clamping component. After fixing the turbine guide vane blank to the clamping assembly, the turbine guide vane blank is processed to produce the upper differential blade corresponding to the upper differential angle, the middle differential blade corresponding to the middle differential angle, and the lower differential blade corresponding to the lower differential angle. The turbine guide vane is assembled using the upper differential blade, the middle differential blade, and the lower differential blade. The exhaust area of the turbine guide vane is adjusted by changing the proportion of the upper differential blade, the middle differential blade, and the lower differential blade in the total number of blades of the turbine guide vane.
2. The method for adjusting the exhaust area of the turbine guide vane according to claim 1, characterized in that, The exhaust area of the turbine guide vane is adjusted by changing the proportions of the upper differential blade, the middle differential blade, and the lower differential blade in the total number of blades of the turbine guide vane, including: The turbine guide vane is assembled using the aforementioned intermediate differential blades. The exhaust area of the turbine guide vane is tested, and the following operations are performed until the exhaust area is within the range of the standard exhaust area: If the exhaust area is larger than the standard exhaust area, the middle differential blade is replaced with the upper differential blade; If the exhaust area is smaller than the standard exhaust area, the intermediate differential blade is replaced with the lower differential blade.
3. The method for adjusting the exhaust area of the turbine guide vane according to claim 1, characterized in that, The exhaust area of the turbine guide vane is adjusted by changing the proportions of the upper differential blade, the middle differential blade, and the lower differential blade in the total number of blades of the turbine guide vane, including: The turbine guide vane is assembled using a combination of the upper and lower differential blades. The exhaust area of the turbine guide vane is tested, and the following operations are performed until the exhaust area is within the range of the standard exhaust area: If the exhaust area is larger than the standard exhaust area, the lower differential blade is replaced with the middle differential blade; If the exhaust area is smaller than the standard exhaust area, the upper differential blade is replaced with the middle differential blade.
4. The method for adjusting the exhaust area of the turbine guide vane according to claim 1, characterized in that, The clamping assembly includes: A plate base (1) is provided at the bottom of the clamping assembly, and the turbine guide vane blank is fixed on the plate base (1). The base plate (1) includes an upper surface (101) and a lower surface (102), and the upper surface (101) and the lower surface (102) have a base angle.
5. The method for adjusting the exhaust area of the turbine guide vane according to claim 4, characterized in that, Based on the preset difference angle, the corresponding clamping components are processed, including: Three types of clamping components are processed respectively, and the clamping component with a base angle of zero degrees is taken as the clamping component corresponding to the median difference angle; The clamping component whose base angle is the preset difference angle is taken as the clamping component corresponding to the upper difference angle; The clamping component with a base angle of negative preset difference is taken as the clamping component corresponding to the lower difference angle.
6. The method for adjusting the exhaust area of the turbine guide vane according to claim 4, characterized in that, The clamping assembly further includes: The fixture base (2) and the stop bar (3); The baffle (3) is set on the upper surface of the plate base (1), and the fixture base (2) is positioned with the plate base (1) by the baffle (3). When the turbine guide blade blank is processed, the turbine guide blade blank is clamped onto the fixture base (2).
7. The method for adjusting the exhaust area of the turbine guide vane according to claim 1, characterized in that, After fixing the turbine guide vane blank to the clamping assembly, the turbine guide vane blank is processed, including: Place the plate base (1) and the fixture base (2) on a surface grinder; After pressing the plate base (1) and the fixture base (2) against the surface grinder, the turbine guide vane blank is clamped onto the fixture base (2); The back radial surface of the turbine guide vane blank is ground; After the back radial surface is ground, the back radial surface of the turbine guide blade blank is used as the precision reference surface for positioning, and the basin radial surface of the turbine guide blade blank is ground.
8. The method for adjusting the exhaust area of a turbine guide vane according to claim 7, characterized in that, The process of clamping the turbine guide vane blank onto the fixture base (2) also includes: Before the turbine guide vane blank is clamped onto the fixture base (2), the parallelism between the reference surface of the fixture base (2) and the spindle of the surface grinder is less than or equal to 0.02 mm.
9. The method for adjusting the exhaust area of the turbine guide vane according to claim 7, characterized in that, The process of clamping the turbine guide vane blank onto the fixture base (2) also includes: After the turbine guide blade blank is clamped onto the fixture base (2), the gap between the turbine guide blade blank and the fixture base (2) at the positioning point of the fixture base (2) is less than or equal to 0.02 mm.
10. The method for adjusting the exhaust area of a turbine guide vane according to claim 7, further comprising clamping the turbine guide vane blank onto the fixture base (2): The turbine guide blade blank is positioned and clamped using the six-point positioning principle.