Turbine blade spraying shielding tool and turbine blade test path manufacturing method

Abstract

The application discloses a turbine blade spraying shielding tool and a turbine blade test path manufacturing method, and aims to provide a turbine blade spraying shielding tool and a turbine blade test path manufacturing method which can save the step of removing the turbine blade surface thermal insulation coating when arranging the measuring points and the measuring point lead path, guarantee the integrity of the blade base body and the coating, and improve the test data accuracy. The turbine blade spraying shielding tool comprises a test path shielding piece, a blade type fitting surface matched with the turbine blade surface is arranged on the test path shielding piece; an edge positioning piece is connected with the test path shielding piece, the edge positioning piece is matched with the turbine blade edge, so that the test path shielding piece is positioned; and an end wall positioning piece is connected with the test path shielding piece, the end wall positioning piece is matched with the turbine blade end wall, so that the test path shielding piece is positioned.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of turbine blade test, in particular to a turbine blade spraying shielding tool and a turbine blade test path manufacturing method. BACKGROUND

[0002] Turbine blade is one of the core parts of gas turbine. In order to obtain the parameters such as temperature, pressure, flow, stress and strain, the turbine blade needs to undergo a large number of tests, such as blade internal heat transfer coefficient measurement test, blade external heat transfer coefficient measurement test, blade cooling efficiency test, turbine characteristic test, gas turbine whole machine test and the like. These tests can provide feedback for the aerodynamic, cooling, structure and strength design of the blade, and are the necessary link for verifying and correcting the design. Most of these tests need to arrange probes or sensors on the surface of the blade, such as blade profile probe, thermocouple, strain gauge and pressure probe. Before arranging these sensors, the heat insulation coating on the measuring point and the measuring point lead path of the turbine blade must be removed. At present, the thickness of the heat insulation coating of the turbine blade is generally 0.1-0.5mm, and the adhesion is relatively large. When removing the heat insulation coating, it needs to go through clamping, sand blasting, polishing, chemical corrosion and the like. Therefore, the coating and the substrate of the turbine blade are at risk of being damaged. These damages are often the starting point of cracks and defects of the turbine blade and the coating. In the high temperature and high pressure test environment, these defects are easy to affect the test results, resulting in significant economic and time loss.

[0003] On the other hand, since the surface of the turbine blade is a complex three-dimensional curved surface, a series of manual operations are needed to arrange the measuring points, such as placing the measuring points, welding, fixing the measuring points and measuring point lead, etc. When these operations are carried out on the complex three-dimensional surface of the blade, it is difficult to achieve accurate positioning, resulting in a position error of the measuring point arrangement greater than the millimeter level. The inaccuracy of the measuring point position also causes errors in the subsequent test data processing. SUMMARY

[0004] The first object of the present application is to provide a turbine blade spraying shielding tool and a turbine blade test path manufacturing method which can save the step of removing the heat insulation coating on the surface of the turbine blade when arranging the measuring points and the measuring point lead path, thereby effectively solving the problem that the coating and the substrate of the turbine blade are damaged due to the removal of the heat insulation coating, ensuring the integrity of the blade substrate and the coating, and improving the accuracy of the test data.

[0005] The second object of the present application is to provide a turbine blade spraying shielding tool and a turbine blade test path manufacturing method which can obtain accurate measuring point positions, thereby improving the accuracy of the test data.

[0006] The technical solution of the present application is:

[0007] A turbine blade spraying shielding tool, comprising:

[0008] The test path shielding piece is provided with a blade type fitting surface matched with the surface of the turbine blade.

[0009] The edge positioning piece is connected with the test path shielding piece, and cooperates with the edge of the turbine blade to position the test path shielding piece.

[0010] The end wall positioning piece is connected with the test path shielding piece, and cooperates with the end wall of the turbine blade to position the test path shielding piece. The present scheme is aimed at the problem that in the existing turbine blade test arrangement of measuring points and measuring point lead path, the thermal insulation coating of the turbine blade needs to be removed, which leads to the damage of the thermal insulation coating and the substrate of the turbine blade, and affects the test result. The turbine blade spraying shielding tool is specially provided, and the measuring points and measuring point lead path are reserved in advance in the process of spraying the thermal insulation coating on the surface of the turbine blade, so that the step of removing the thermal insulation coating on the surface of the turbine blade in the existing turbine blade test method is saved, thereby effectively solving the problem that the coating and substrate of the turbine blade are damaged due to the removal of the thermal insulation coating, ensuring the integrity of the blade substrate and the coating, and improving the accuracy of the test data.

[0011] As a preferred, the test path shielding piece is provided with a measuring point reservation hole. In this way, when arranging the measuring points, the test path shielding piece of the turbine blade spraying shielding tool can be positioned on the turbine blade, and then the measuring points on the turbine blade are positioned through the measuring point reservation hole (i.e. marking the corresponding position on the turbine blade through the measuring point reservation hole), so as to obtain accurate measuring point positions and improve the accuracy of test data analysis. On the other hand, when measuring data by using a probe sensor, after the probe sensor is installed on the surface of the turbine blade, the test path shielding piece of the turbine blade spraying shielding tool can be positioned on the turbine blade again, so that the probe sensor passes through the measuring point reservation hole, and whether the installation position and angle of the probe sensor are correct is checked by observing whether the measuring point reservation hole and the axis of the probe sensor are coincident.

[0012] As a preferred, the measuring point reservation hole is in communication with the blade type fitting surface, and an inner wall surface fillet is arranged at the connecting port edge of the measuring point reservation hole and the blade type fitting surface. Since the probe sensor is generally fixed on the turbine blade by welding, when the measuring point reservation hole of the turbine blade spraying shielding tool is used to check whether the installation angle of the probe sensor is correct, in order to avoid the interference between the weld at the welding position of the probe sensor and the port of the measuring point reservation hole, the inner wall surface fillet is arranged to prevent the tool from being blocked by the weld during tool fitting, and to affect the checking of the installation position and angle of the probe sensor.

[0013] As preferred, the end wall positioning member is provided with an alignment check end face aligned with one end face of the turbine blade. After the test path shielding member of the turbine blade spraying shielding tool is positioned on the turbine blade, the alignment check end face of the tool will be aligned with one end face of the turbine blade, so that the user can determine whether the turbine blade spraying shielding tool is correctly positioned by the alignment of the alignment check end face of the tool with one end face of the turbine blade.

[0014] As preferred, the edge positioning member includes two left and right side positioning members, and the two left and right side positioning members and the airfoil fitting surface form an edge positioning groove. In actual use, the edge of the turbine blade is located in the edge positioning groove, and the edge positioning groove cooperates with the edge of the turbine blade to position the test path shielding member.

[0015] As preferred, the edge positioning member includes an arc-shaped groove cooperating with the edge of the turbine blade. In actual use, the arc-shaped groove of the edge positioning member fits the arc surface of the edge of the turbine blade to position the test path shielding member.

[0016] As preferred, the end wall positioning member includes an end wall positioning surface cooperating with the end wall surface of the turbine blade. In actual use, the end wall positioning surface of the end wall positioning member fits the end wall surface of the turbine blade to position the test path shielding member.

[0017] As preferred, the test path shielding member, the edge positioning member and the end wall positioning member are an integral structure and are made by 3D printing. The turbine blade spraying shielding tool made by 3D printing has high manufacturing precision and can be made into various complex curved surfaces, thereby ensuring the manufacturing requirements and precision of the turbine blade spraying shielding tool.

[0018] A turbine blade test path manufacturing method using a turbine blade spraying shielding tool, which sequentially includes the following steps,

[0019] First, before spraying the turbine blade, the airfoil fitting surface of the test path shielding member is tightly attached to the surface of the turbine blade to be cooperated, and the test path shielding member is positioned on the turbine blade by cooperating the edge positioning member with the edge of the turbine blade and the end wall positioning member with the end wall of the turbine blade.

[0020] Second, draw the contour line of the test path shielding member on the surface of the turbine blade, and then remove the turbine blade spraying shielding tool;

[0021] Third, the turbine blade surface in the contour line is pasted with a shielding member, and the turbine blade surface in the contour line is shielded by the shielding member, and the shape and size of the shielding member are the same as the contour line of the test path shielding member.

[0022] Fourth, the turbine blade surface is sprayed with a thermal barrier coating;

[0023] Fifth, remove the turbine blade surface shielding. The turbine blade test path making method of the scheme, by pre-leaving the measuring point and measuring point lead path in the process of spraying the heat insulation coating on the turbine blade surface, the step of removing the heat insulation coating on the turbine blade surface when arranging the measuring point and measuring point lead path in the existing turbine blade test method is saved, thereby effectively solving the problem that the coating and substrate of the turbine blade are damaged due to the removal of the heat insulation coating, ensuring the integrity of the blade substrate and coating, and improving the accuracy of test data.

[0024] A turbine blade test path making method using a turbine blade spraying shielding tool, sequentially comprising the following steps,

[0025] First, before spraying the turbine blade, the blade profile fitting surface of the test path shielding member is tightly attached to the surface of the turbine blade matched therewith, and is matched with the edge of the turbine blade through the edge positioning member and matched with the end wall of the turbine blade through the end wall positioning member, so as to position the test path shielding member on the turbine blade;

[0026] Second, the contour line of the test path shielding member and the end wall positioning member is drawn on the surface of the turbine blade, and then the turbine blade spraying shielding tool is removed;

[0027] Third, the turbine blade surface in the contour line is pasted with the shielding member, and the turbine blade surface in the contour line is shielded through the shielding member, and the shape and size of the shielding member are the same as those of the contour line of the test path shielding member and the end wall positioning member;

[0028] Fourth, the turbine blade surface is sprayed with a heat insulation coating;

[0029] Fifth, remove the turbine blade surface shielding. The turbine blade test path making method of the scheme, by pre-leaving the measuring point and measuring point lead path in the process of spraying the heat insulation coating on the turbine blade surface, the step of removing the heat insulation coating on the turbine blade surface when arranging the measuring point and measuring point lead path in the existing turbine blade test method is saved, thereby effectively solving the problem that the coating and substrate of the turbine blade are damaged due to the removal of the heat insulation coating, ensuring the integrity of the blade substrate and coating, and improving the accuracy of test data.

[0030] The beneficial effects of the present application are:

[0031] First, the step of removing the heat insulation coating on the turbine blade surface when arranging the measuring point and measuring point lead path can be saved, thereby effectively solving the problem that the coating and substrate of the turbine blade are damaged due to the removal of the heat insulation coating, ensuring the integrity of the blade substrate and coating, and improving the accuracy of test data.

[0032] Second, the accurate measuring point position can be obtained, thereby improving the accuracy of test data. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic view of the turbine blade spraying shielding tool of the specific embodiment one of the present application when applied to a turbine blade.

[0034] Figure 2 is a structural schematic view of the turbine blade spraying shielding tool of the specific embodiment one of the present application from a certain perspective.

[0035] Figure 3 is a structural schematic view of the turbine blade spraying shielding tool of the specific embodiment one of the present application from another perspective.

[0036] Figure 4 is a structural schematic view of the turbine blade spraying shielding tool of the specific embodiment two of the present application when applied to a turbine blade.

[0037] Figure 5 is a structural schematic view of the turbine blade spraying shielding tool of the specific embodiment two of the present application from a certain perspective.

[0038] Figure 6 is a structural schematic view of the turbine blade spraying shielding tool of the specific embodiment two of the present application from another perspective.

[0039] In the figure:

[0040] Test path shielding piece 1, airfoil fitting surface 1.0, shielding piece 1.1, end connecting piece 1.2;

[0041] Edge positioning piece 2, side positioning piece 2.1, edge positioning groove 2.2, arc-shaped groove 2.3;

[0042] End wall positioning piece 3, end wall positioning surface 3.1;

[0043] Turbine blade 4;

[0044] Measuring point reserved hole 5, inner wall surface fillet 5.1;

[0045] Probe sensor 6;

[0046] Alignment checking end surface 7;

[0047] Middle connecting piece 8;

[0048] Edge connecting piece 9. DETAILED DESCRIPTION

[0049] The present application will be further described in detail below in combination with the accompanying drawings and specific embodiments:

[0050] Specific embodiment one, as Figure 1 , Figure 2 , Figure 3As shown, a turbine blade spraying shielding tool includes a test path shielding piece 1, an edge positioning piece 2 matched with the edge of the turbine blade, and an end wall positioning piece 3 matched with the end wall of the turbine blade. The test path shielding piece 1 is provided with a blade profile fitting surface 1.0 matched with the surface of the turbine blade 4. The blade profile fitting surface is completely the same as the surface of the turbine blade matched therewith, so that the blade profile fitting surface of the test path shielding piece can be fitted with the surface of the turbine blade matched therewith. The edge positioning piece 2 is connected with the test path shielding piece. The edge positioning piece is matched with the edge of the turbine blade to position the test path shielding piece. The end wall positioning piece 3 is connected with the test path shielding piece. The end wall positioning piece is matched with the end wall of the turbine blade to position the test path shielding piece.

[0051] The turbine blade spraying shielding tool of the embodiment is specifically arranged for the problem that the existing turbine blade test method needs to remove the thermal insulation coating on the surface of the turbine blade when arranging the test points and the test point lead path, which causes the thermal insulation coating and the substrate of the turbine blade to be easily damaged and affects the test result. The turbine blade spraying shielding tool is specially arranged. Before spraying the turbine blade, the blade profile fitting surface of the test path shielding piece is tightly fitted on the surface of the turbine blade matched therewith, and the test path shielding piece is positioned on the turbine blade by matching the edge positioning piece with the edge of the turbine blade and matching the end wall positioning piece with the end wall of the turbine blade. Therefore, the test points and the test point lead path are reserved in advance in the process of spraying the thermal insulation coating on the surface of the turbine blade, and the step of removing the thermal insulation coating on the surface of the turbine blade when arranging the test points and the test point lead path in the existing turbine blade test method is omitted, thereby effectively solving the problem that the coating and the substrate of the turbine blade are damaged due to the removal of the thermal insulation coating, ensuring the integrity of the blade substrate and the coating, and improving the accuracy of the test data.

[0052] Specifically, the test path shielding piece 1, the edge positioning piece 2, and the end wall positioning piece 3 are an integral structure and are made by 3D printing. The turbine blade spraying shielding tool made by 3D printing has high manufacturing precision and can manufacture various complex curved surfaces, thereby ensuring the manufacturing requirements and precision of the turbine blade spraying shielding tool. The test path shielding piece, the edge positioning piece, and the end wall positioning piece are designed with equal thickness.

[0053] As shown in FIG. 1, the turbine blade spraying shielding tool is used for arranging the test points and the test point lead path on the turbine blade 4. The turbine blade spraying shielding tool is provided with the test path shielding piece 1, the edge positioning piece 2, and the end wall positioning piece 3. The test path shielding piece 1 is provided with the blade profile fitting surface 1.0 matched with the surface of the turbine blade 4. The edge positioning piece 2 is matched with the edge of the turbine blade 4. The end wall positioning piece 3 is matched with the end wall of the turbine blade 4. Figure 1 , Figure 2 、 Figure 3As shown, the edge positioning member 2 includes two side positioning members 2.1. The opposite sides of the two side positioning members are arc surfaces that cooperate with the surface of the turbine blade. The airfoil fitting surface is located between the two side positioning members. The edge positioning groove 2.2 is formed between the two side positioning members and the airfoil fitting surface. In actual use, the edge of the turbine blade is located in the edge positioning groove, and the edge positioning groove cooperates with the edge of the turbine blade to position the test path shielding member. In this embodiment, the edge positioning member 2 cooperates with the leading edge of the turbine blade, the leading edge of the turbine blade is located in the edge positioning groove 2.2, and the edge positioning groove cooperates with the leading edge of the turbine blade to position the test path shielding member.

[0054] The end wall positioning member 3 includes an end wall positioning surface 3.1 that cooperates with the end wall surface of the turbine blade. In actual use, the end wall positioning member cooperates with the end wall surface of the turbine blade through the end wall positioning surface to position the test path shielding member.

[0055] In this embodiment, in order to facilitate the user to operate and distinguish the test path shielding member, the surfaces of the test path shielding member, the edge positioning member and the end wall positioning member are painted in different colors to distinguish them.

[0056] Further, as shown in Figure 1 , Figure 2 、 Figure 3 The test path shielding member 1 is provided with a measurement point reservation hole 5. The measurement point reservation hole is one or more, and the arrangement of the measurement point reservation hole is determined according to the number of measurement points in actual test. In this embodiment, the measurement point reservation hole is two. In this way, when arranging the measurement points, the test path shielding member of the turbine blade spray shielding tooling can be positioned on the turbine blade, then the measurement points on the turbine blade can be positioned (i.e. the corresponding position on the turbine blade is marked through the measurement point reservation hole) through the measurement point reservation hole to obtain accurate measurement point positions and improve the accuracy of test data analysis. On the other hand, when using a probe sensor to measure data, after the probe sensor 6 is installed on the surface of the turbine blade, the test path shielding member of the turbine blade spray shielding tooling can be positioned on the turbine blade again, the probe sensor passes through the measurement point reservation hole, and then whether the installation angle of the probe sensor is correct is checked by observing whether the measurement point reservation hole and the axis of the probe sensor coincide; whether the installation position of the probe sensor is correct is checked by observing the gap size between the measurement point reservation hole and the probe sensor. In this embodiment, the inner diameter of the measurement point reservation hole is greater than the outer diameter of the probe sensor. The measurement point reservation hole is made by 3D printing.

[0057] Further, as shown in Figure 3As shown, the measurement point reserved hole is in communication with the blade profile abutting surface, and the edge of the connecting port of the measurement point reserved hole 5 and the blade profile abutting surface 1.0 is provided with an inner wall surface round corner 5.1. Since the probe sensor is generally fixed on the turbine blade by welding, when the measurement point reserved hole of the turbine blade spraying shielding tool is used to check whether the installation angle of the probe sensor is correct, in order to avoid the interference between the weld at the welding position of the probe sensor and the port of the measurement point reserved hole, the inner wall surface round corner is arranged to prevent the tool from being dead due to the weld during tool fitting, thereby affecting the check of the installation position and angle of the probe sensor.

[0058] Further, as shown in Figure 1 The end wall positioning member 3 is provided with an alignment check end surface 7 aligned with one end surface of the turbine blade. After the test path shielding member of the turbine blade spraying shielding tool is positioned on the turbine blade, the alignment check end surface of the tool will be aligned with one end surface of the turbine blade, so that the user can determine whether the turbine blade spraying shielding tool is correctly positioned by checking whether the alignment check end surface of the tool is flush with one end surface of the turbine blade.

[0059] Specific embodiment two, a turbine blade test path manufacturing method using a turbine blade spraying shielding tool. The specific structure of the turbine blade spraying shielding tool in this embodiment is referred to the specific embodiment one.

[0060] A turbine blade test path manufacturing method using a turbine blade spraying shielding tool, which comprises the following steps in sequence,

[0061] First, as shown in Figure 1 Before spraying the turbine blade, the blade profile abutting surface of the test path shielding member 1 is tightly attached to the surface of the turbine blade to be matched, and the edge positioning member 2 is matched with the edge of the turbine blade, and the end wall positioning member 3 is matched with the end wall of the turbine blade, so as to position the test path shielding member on the turbine blade.

[0062] Second, draw the contour line of the test path shielding member on the surface of the turbine blade, and then remove the turbine blade spraying shielding tool.

[0063] Third, the shielding member is pasted on the turbine blade surface within the contour line, and the turbine blade surface within the contour line is shielded by the shielding member. The shape and size of the shielding member are the same as those of the test path shielding member.

[0064] In one embodiment of the present embodiment, the shielding member is an adhesive tape, and the shape and size of the adhesive tape are the same as those of the test path shielding member. The adhesive tape is pasted on the turbine blade surface within the contour line to shield the turbine blade surface within the contour line.

[0065] In another embodiment of the present embodiment, the shielding member is a plastic member or a metal member, which has the same shape and size as the test path shielding member, and is attached to the surface of the turbine blade within the profile line to shield the surface of the turbine blade within the profile line.

[0066] Fourth, the surface of the turbine blade is sprayed with a thermal barrier coating.

[0067] Fifth, the shielding member on the surface of the turbine blade is removed, i.e. torn off, so that a test path (including the measurement point and the measurement point lead path) without the thermal barrier coating is reserved on the surface of the turbine blade. The turbine blade test path manufacturing method of the present embodiment reserves the measurement point and the measurement point lead path in advance during the process of spraying the thermal barrier coating on the surface of the turbine blade, and eliminates the step of removing the thermal barrier coating on the surface of the turbine blade when arranging the measurement point and the measurement point lead path in the existing turbine blade test method, thereby effectively solving the problem that the coating and the substrate of the turbine blade are damaged due to the removal of the thermal barrier coating, ensuring the integrity of the blade substrate and the coating, and improving the accuracy of the test data.

[0068] Specific embodiment three, as shown in Figure 4 , Figure 5 、 Figure 6 A turbine blade spraying shielding tool, comprising a test path shielding member 1, an edge positioning member 2 cooperating with the edge of the turbine blade, and an end wall positioning member 3 cooperating with the end wall of the turbine blade. The test path shielding member 1 is provided with a blade profile fitting surface 1.0 matched with the surface of the turbine blade 4. The blade profile fitting surface is completely the same as the surface of the turbine blade it cooperates with, so that the blade profile fitting surface of the test path shielding member can be fitted with the surface of the turbine blade it cooperates with. The edge positioning member 2 is connected with the test path shielding member. The edge positioning member cooperates with the edge of the turbine blade to position the test path shielding member. The end wall positioning member 3 is connected with the test path shielding member. The end wall positioning member cooperates with the end wall of the turbine blade to position the test path shielding member.

[0069] The turbine blade spraying shielding tool of the embodiment is specially provided for the problem that the existing turbine blade test arrangement needs to remove the surface thermal insulation coating of the turbine blade when arranging the test points and the test point lead path, which causes the thermal insulation coating and the substrate of the turbine blade to be easily damaged and affects the test result. The turbine blade spraying shielding tool is specially provided. Before spraying the turbine blade, the blade profile fitting surface of the test path shielding piece is tightly fitted on the surface of the turbine blade matched therewith, and the edge positioning piece is matched with the edge of the turbine blade and the end wall positioning piece is matched with the end wall of the turbine blade, so as to position the test path shielding piece on the turbine blade. Thus, the test points and the test point lead path are left in advance in the process of spraying the thermal insulation coating on the surface of the turbine blade, and the step of removing the surface thermal insulation coating of the turbine blade when arranging the test points and the test point lead path in the existing turbine blade test method is saved, so as to effectively solve the problem that the coating and the substrate of the turbine blade are damaged due to the removal of the thermal insulation coating, guarantee the integrity of the blade substrate and the coating, and improve the accuracy of the test data.

[0070] Specifically, as shown in Figure 4 , Figure 5 、 Figure 6 , the test path shielding piece 1 includes two shielding pieces 1.1 and an end connecting piece 1.2 connecting the same end of the two shielding pieces. The two shielding pieces are parallel. The end wall positioning piece 3 is connected with the end connecting piece. The turbine blade spraying shielding tool further includes a middle connecting piece 8 connecting the middle part of the two shielding pieces, and the edge positioning piece 2 is connected with one shielding piece of the test path shielding piece through an edge connecting piece 9.

[0071] The test path shielding piece, the edge positioning piece, the end wall positioning piece, the middle connecting piece and the edge connecting piece are of an integrated structure and are made by 3D printing. The turbine blade spraying shielding tool made by 3D printing has high manufacturing precision and can be made into various complex curved surfaces, so as to guarantee the manufacturing requirements and precision of the turbine blade spraying shielding tool. The test path shielding piece, the edge positioning piece, the end wall positioning piece, the middle connecting piece and the edge connecting piece are designed with equal thickness.

[0072] The edge positioning piece 2 includes an arc-shaped groove 2.3 matched with the edge of the turbine blade. In actual use, the arc-shaped groove of the edge positioning piece is matched with the arc surface of the edge of the turbine blade, so as to position the test path shielding piece. In the embodiment, the edge positioning piece 2 is matched with the trailing edge of the turbine blade, and the arc-shaped groove 2.3 is matched with the arc surface of the trailing edge of the turbine blade, so as to position the test path shielding piece.

[0073] The end wall positioning piece 3 includes an end wall positioning surface 3.1 matched with the surface of the end wall of the turbine blade. In actual use, the end wall positioning piece is matched with the surface of the end wall of the turbine blade through the end wall positioning surface, so as to position the test path shielding piece.

[0074] In this embodiment, in order to facilitate the user to operate and distinguish, the test path shielding piece and the end wall positioning piece are painted with one color, and the edge positioning piece, the middle connecting piece and the edge connecting piece are painted with other colors to distinguish.

[0075] Further, as shown in Figure 4 , Figure 5 , Figure 6 , the test path shielding piece is provided with a measurement point reserved hole 5. The measurement point reserved hole is one or more, and the arrangement of the measurement point reserved hole is determined according to the number of measurement points in actual test. In this embodiment, the measurement point reserved hole is two, and the two measurement point reserved holes are correspondingly arranged on the two shielding pieces 1.1. In this way, when arranging the measurement points, the test path shielding piece of the turbine blade spraying shielding tool can be positioned on the turbine blade, and then the measurement points on the turbine blade can be positioned (that is, the corresponding positions of the turbine blade are marked through the measurement point reserved hole) through the measurement point reserved hole to obtain accurate measurement point positions and improve the accuracy of test data analysis. On the other hand, when measuring data by using a probe sensor, after the probe sensor is installed on the surface of the turbine blade, the test path shielding piece of the turbine blade spraying shielding tool can be positioned on the turbine blade again, the probe sensor passes through the measurement point reserved hole, and then whether the installation angle of the probe sensor is correct is checked by observing whether the measurement point reserved hole and the axis of the probe sensor are coincident; whether the installation position of the probe sensor is correct is checked by observing the gap size between the measurement point reserved hole and the probe sensor. In this embodiment, the inner diameter of the measurement point reserved hole is greater than the outer diameter of the probe sensor. The measurement point reserved hole is made by 3D printing.

[0076] Further, as shown in Figure 4 , Figure 5 , the end wall positioning piece 3 is provided with an alignment check end face 7 aligned with one end face of the turbine blade. After the test path shielding piece of the turbine blade spraying shielding tool is positioned on the turbine blade, the alignment check end face of the tool will be aligned with one end face of the turbine blade, so that the user can judge whether the turbine blade spraying shielding tool is correctly positioned by the alignment of the alignment check end face of the tool and one end face of the turbine blade.

[0077] Specific embodiment four, a turbine blade test path manufacturing method using a turbine blade spraying shielding tool. The specific structure of the turbine blade spraying shielding tool in this embodiment is referred to the specific embodiment three.

[0078] A turbine blade test path manufacturing method using a turbine blade spraying shielding tool, which comprises the following steps in sequence,

[0079] First, as shown in Figure 4As shown, before spraying the turbine blade, the profiled surface 1.0 of the test path shielding piece 1 is tightly attached to the surface of the turbine blade to which it is matched, and is matched with the edge of the turbine blade through the edge positioning piece 2 and matched with the end wall of the turbine blade through the end wall positioning piece 3, so as to position the test path shielding piece on the turbine blade.

[0080] Secondly, the contour lines of the test path shielding piece and the end wall positioning piece are drawn on the surface of the turbine blade, and then the turbine blade spraying shielding tool is removed.

[0081] Thirdly, the shielding piece is pasted on the surface of the turbine blade within the contour lines, and the surface of the turbine blade within the contour lines is shielded through the shielding piece, and the shape and size of the shielding piece are the same as the contour lines of the test path shielding piece and the end wall positioning piece.

[0082] In one embodiment of the present embodiment, the shielding piece is an adhesive tape, the shape and size of the adhesive tape are the same as the test path shielding piece, and the adhesive tape is pasted on the surface of the turbine blade within the contour lines to shield the surface of the turbine blade within the contour lines.

[0083] In another embodiment of the present embodiment, the shielding piece is a plastic piece or a metal piece, the shape and size of the plastic piece or the metal piece are the same as the test path shielding piece, and the plastic piece or the metal piece is pasted on the surface of the turbine blade within the contour lines to shield the surface of the turbine blade within the contour lines.

[0084] Fourthly, the turbine blade surface is sprayed with a thermal barrier coating.

[0085] Fifthly, the shielding piece on the surface of the turbine blade is removed, i.e. the shielding piece is torn off, so that the test path (including the measuring point and the measuring point lead path) without the thermal barrier coating is reserved on the surface of the turbine blade. The turbine blade test path manufacturing method of the present embodiment reserves the measuring point and the measuring point lead path in advance in the process of spraying the thermal barrier coating on the surface of the turbine blade, and eliminates the step of removing the thermal barrier coating on the surface of the turbine blade when arranging the measuring point and the measuring point lead path in the existing turbine blade test method, thereby effectively solving the problem that the coating and the substrate of the turbine blade are damaged due to the removal of the thermal barrier coating, ensuring the integrity of the blade substrate and the coating, and improving the accuracy of the test data.

[0086] The above is only a preferred embodiment of the present application, and does not limit the present application, and any simple modification, change and equivalent transformation of the above embodiment according to the technical essence of the present application still belongs to the protection scope of the technical solution of the present application.

Claims

1. A turbine blade spray masking tool, characterized in that: include: A test path shielding member, the test path shielding member is provided with a blade-shaped fitting surface matching the surface of the turbine blade; an edge locating member cooperating with an edge of the turbine blade, the edge locating member being connected to the test path shielding member, the edge locating member cooperating with the edge of the turbine blade to position the test path shielding member; an end wall locator engaged with the end wall of the turbine blade, the end wall locator being connected to the test path shielding member, and the end wall locator engaging with the end wall of the turbine blade to position the test path shielding member; The test path shielding piece is provided with a measuring point reserved hole, and the measuring point reserved hole is communicated with the blade profile fitting surface.

2. The turbine blade spray masking tool according to claim 1, characterized in that: The edge of the connection port between the measuring point reserved hole and the blade profile fitting surface is provided with an inner wall fillet.

3. The turbine blade spray masking tool according to claim 1 or 2, characterized in that: The end wall positioning piece is provided with an alignment inspection end surface aligned with one end surface of the turbine blade.

4. The turbine blade spray masking tool according to claim 1 or 2, characterized in that: The edge positioning member includes two left and right side positioning members, and an edge positioning groove is formed between the left and right side positioning members and the blade-shaped fitting surface.

5. The turbine blade spray masking tool according to claim 1 or 2, characterized in that: The edge positioning member includes an arc-shaped groove that cooperates with the edge of the turbine blade.

6. The turbine blade spray masking tool according to claim 1 or 2, characterized in that: The end wall positioning member includes an end wall positioning surface that cooperates with the end wall surface of the turbine blade.

7. The turbine blade spray masking tool according to claim 1 or 2, characterized in that: The test path shielding member, the edge positioning member and the end wall positioning member are an integrated structure and are manufactured by 3D printing.

8. A method for producing a turbine blade test path using the turbine blade spray masking tool according to any one of claims 1 to 7, characterized in that: The following steps are included in sequence: First, before spraying the turbine blade, the airfoil-fitting surface of the test path shield is placed in close contact with the surface of the mating turbine blade. The test path shield is then positioned on the turbine blade using edge locators and end wall locators. Second, draw the outline of the test path mask on the turbine blade surface, and then remove the turbine blade spray masking tooling; Third, a shielding member is attached to the surface of the turbine blade within the contour line to shield the surface of the turbine blade within the contour line. The shape and size of the shielding member are the same as the contour line of the test path shielding member. Fourth, spray thermal insulation coating on the surface of turbine blades; Fifth, remove the shielding from the surface of the turbine blades.

9. A method for producing a turbine blade test path using the turbine blade spray masking tool according to any one of claims 1 to 7, characterized in that: The following steps are included in sequence: First, before spraying the turbine blade, the airfoil-fitting surface of the test path shield is placed in close contact with the surface of the mating turbine blade. The test path shield is then positioned on the turbine blade using edge locators and end wall locators. Second, draw the outlines of the test path mask and end wall locator on the turbine blade surface, and then remove the turbine blade spray masking tooling; Third, a shielding member is attached to the turbine blade surface within the contour line to shield the turbine blade surface within the contour line. The shielding member has the same shape and size as the contour line of the test path shielding member and the end wall positioning member. Fourth, spray thermal insulation coating on the surface of turbine blades; Fifth, remove the shielding from the surface of the turbine blades.

Images