Clamping device for machining margin plate of turbine guide vane of gas turbine

Abstract

The invention provides an edge plate machining clamping device for a turbine guide vane of a gas turbine, and relates to the technical field of machining, a turbine guide vane to be machined is supported through a knife edge ruler and a ball head positioning pin arranged on an axial positioning seat, and main positioning and positioning in the in-out direction are achieved; an outer ring positioning seat, an outer ring pressing seat, a first guide pressing mechanism, a C-shaped pressing screw and a Z-shaped pressing plate are connected, and a lateral supporting force is applied in combination with an outer ring floating support, so that the turbine guide vane to be machined is tightly attached to a molded surface outer ring air inlet side positioning point; an inner ring positioning seat, an inner ring pressing seat, a first guide pressing mechanism, a C-shaped pressing screw and a Z-shaped pressing plate are connected, and in combination with an inner ring floating support, lateral supporting force is applied, so that the turbine guide vane to be machined is tightly attached to a molded surface inner ring air inlet side positioning point; and the blade body pressing seat, the limiting pin, the second guide pressing mechanism, the connecting rod and the check block apply downward pressing force, so that the main positioning surface of the turbine guide blade to be machined is tightly attached to the profile positioning point and the axial positioning point of the turbine guide blade.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a clamping device for machining the rim plate of a gas turbine guide vane. Background Technology

[0002] Since its invention in the 1930s, the gas turbine has developed rapidly. In the field of power generation, heavy-duty gas turbines represent the most efficient large-scale commercial power generation method currently mastered by humankind. With the rapid development of gas turbine manufacturing technology, the materials and processes for turbine guide vanes are constantly being updated, and the corresponding turbine guide vane processing technology is also changing. During the processing of turbine guide vanes, stable clamping is required to ensure that they maintain the correct position and attitude throughout the process.

[0003] Existing turbine guide vane clamping devices are generally designed for standard-sized or heavy gas turbine guide vanes, and these devices are usually capable of handling smaller or medium-sized turbine guide vanes. However, for a certain type of F-class heavy-duty gas turbine with a wide-body, heavy turbine guide vane, the total length of the vane reaches 770mm, the maximum chord width of the blade exceeds 270mm, and the finished weight is nearly 51kg. Due to the large weight and size of the turbine guide vane, it is necessary to tightly fix the turbine guide vane to the clamping device during rough machining. Currently, there is a lack of clamping devices capable of accurately clamping wide-body, heavy-duty turbine guide vanes. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a clamping device for machining the rim plate of a gas turbine guide vane, which can solve the technical problem that existing turbine guide vane clamping devices are unable to handle the machining of wide-body, heavy turbine guide vanes.

[0005] This invention provides a clamping device for machining the rim plate of a gas turbine guide vane, comprising: an outer ring floating support, a guide clamping mechanism, a C-type clamping screw, a Z-type clamping plate, an outer ring clamping seat, a ball-head locating pin, an axial locating seat, a knife-edge ruler, an outer ring locating seat, an inner ring locating seat, an inner ring floating support, an inner ring clamping seat, a guide clamping mechanism, a limit pin, a blade clamping seat, a stop block, and a connecting rod; The blade and the ball-head locating pin on the axial locating seat support the turbine guide vane to be machined, thereby achieving main positioning and positioning of the turbine guide vane in the inlet and outlet directions. The outer ring positioning seat, the outer ring clamping seat, the guide clamping mechanism, the C-type clamping screw, and the Z-type pressure plate are connected together and combined with the outer ring floating support to apply a lateral support force to the turbine guide vane to be processed, so that the turbine guide vane to be processed is in close contact with the air inlet side positioning point of the outer ring of the profile. The inner ring positioning seat, the inner ring clamping seat, the guide clamping mechanism, the C-type clamping screw, and the Z-type pressure plate are connected together and combined with the inner ring floating support to apply a lateral support force to the turbine guide vane to be processed, so that the turbine guide vane to be processed is in close contact with the inner ring air inlet side positioning point of the profile. The blade clamping seat, the limiting pin, the guiding clamping mechanism, the connecting rod, and the stop block apply a downward clamping force to the blade of the turbine guide vane to be processed, so that the main positioning surface of the turbine guide vane to be processed is in close contact with the turbine guide vane profile positioning point and axial positioning point.

[0006] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: In this embodiment of the invention, the coordinated action of the blade ruler, ball-head locating pin, and various clamping seats ensures that the turbine guide vane is firmly fixed and maintains correct positioning during processing, avoiding processing errors caused by unstable clamping. The floating supports of the outer and inner rings, combined with the clamping mechanism, provide uniform lateral support force, preventing deformation or displacement of the turbine guide vane. This allows for processing of the inner and outer ring edge plates of the turbine guide vane under the same clamping condition, ensuring processing accuracy. The design of the blade clamping seat and limiting pin effectively applies downward clamping force, further enhancing the rigidity and stability of the device, thereby improving processing efficiency, reducing processing errors, and ensuring the accuracy of repeated clamping. This enables precise positioning and stable clamping of large-size, heavy-duty turbine guide vanes. Attached Figure Description

[0007] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0008] Figure 1 This is a schematic diagram of the structure of a gas turbine guide vane rim plate processing clamping device provided in an embodiment of the present invention.

[0009] Figure 2 This is a schematic diagram of the structure of a gas turbine guide vane rim plate processing clamping device from another perspective provided in an embodiment of the present invention.

[0010] Figure 3 This is a schematic diagram of the structure of a gas turbine guide vane rim plate processing clamping device provided by an embodiment of the present invention from another perspective.

[0011] Explanation of reference numerals in the attached drawings: 1-Outer ring floating support; 2-First guide clamping mechanism; 3-C-type clamping screw; 4-Z-type pressure plate; 5-Outer ring clamping seat; 6-Ball head locating pin; 7-Axial locating seat; 8-Knife-edge ruler; 9-Outer ring locating seat; 10-Inner ring locating seat; 11-Inner ring floating support; 12-Inner ring clamping seat; 13-Second guide clamping mechanism; 14-Limit pin; 15-Blade clamping seat; 16-Stop block; 17-Connecting rod. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0013] Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts disclosed in this invention.

[0014] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

[0015] Reference manual attached Figures 1 to 3 The present invention provides a structure for a clamping device for machining the blade of a gas turbine guide vane, comprising: an outer ring floating support 1, a first guide clamping mechanism 2, a C-type clamping screw 3, a Z-type pressure plate 4, an outer ring clamping seat 5, a ball head positioning pin 6, an axial positioning seat 7, a knife-edge ruler 8, an outer ring positioning seat 9, an inner ring positioning seat 10, an inner ring floating support 11, an inner ring clamping seat 12, a second guide clamping mechanism 13, a limiting pin 14, a blade clamping seat 15, a stop block 16, and a connecting rod 17.

[0016] The turbine guide vane to be machined is supported by a knife-edge ruler 8 and a ball-head locating pin 6 set on the axial locating seat 7, achieving main positioning and positioning of the turbine guide vane in the infeed and outfeed directions. Precise support of the turbine guide vane ensures that it does not shift during machining, thus guaranteeing machining accuracy. This positioning method allows for precise control of both the axial direction and the infeed / outfeed direction of the turbine guide vane, laying the foundation for subsequent machining steps.

[0017] The outer ring positioning seat 9, outer ring clamping seat 5, first guide clamping mechanism 2, C-type clamping screw 3 and Z-type pressure plate 4 are connected to provide stable support for the outer ring of the turbine guide vane to be processed. Combined with the outer ring floating support 1, the lateral support force of the outer ring is further guaranteed. The lateral support force is applied to the turbine guide vane to be processed, so that the turbine guide vane to be processed is close to the positioning point on the air inlet side of the outer ring of the profile, thereby avoiding unnecessary displacement or deformation of the turbine guide vane to be processed during the processing.

[0018] The inner ring positioning seat 10, inner ring clamping seat 12, first guide clamping mechanism 2, C-type clamping screw 3, and Z-type pressure plate 4 are connected together, and in conjunction with the inner ring floating support 11, a lateral support force is applied to the turbine guide vane to be processed, so that the turbine guide vane to be processed is tightly attached to the positioning point on the air inlet side of the inner ring profile. This design ensures precise positioning between the inner and outer rings, ensuring that the turbine guide vane to be processed can receive uniform support and precise processing.

[0019] The blade clamping seat 15, the limiting pin 14, the second guide clamping mechanism 13, the connecting rod 17, and the stop block 16 apply a downward clamping force to the blade of the turbine guide vane to be processed, so that the main positioning surface of the turbine guide vane to be processed is in close contact with the positioning point of the turbine guide vane profile and the axial positioning point. This downward clamping force not only ensures that the turbine guide vane to be processed is always in a stable clamping state during the processing, but also improves the rigidity of the entire clamping device, preventing the turbine guide vane to be processed from deforming due to uneven force during the processing.

[0020] In this embodiment of the invention, the coordinated action of the blade ruler 8, the ball-head locating pin 6, and the various clamping seats ensures that the turbine guide vane is firmly fixed and maintains correct positioning during processing, avoiding processing errors caused by unstable clamping. The floating supports of the outer and inner rings, combined with the clamping mechanism, provide uniform lateral support force, preventing deformation or displacement of the turbine guide vane. This allows for processing of the inner and outer ring edge plates of the turbine guide vane under the same clamping condition, ensuring processing accuracy. The design of the blade clamping seat 15 and the limiting pin 14 effectively applies downward clamping force, further enhancing the rigidity and stability of the device, thereby improving processing efficiency, reducing processing errors, and ensuring the accuracy of repeated clamping. This enables precise positioning and stable clamping of large-size, heavy-duty turbine guide vanes.

[0021] In one possible implementation, the blade clamping seat 15, the limiting pin 14, the second guide clamping mechanism 13, the connecting rod 17, and the stop block 16 form a flip-up structure to facilitate the clamping of the turbine guide blade to be processed.

[0022] In this embodiment of the invention, the blade clamping seat 15, the limiting pin 14, the second guide clamping mechanism 13, the connecting rod 17, and the stop block 16 are designed as a flip-up structure, which significantly improves the convenience and efficiency of clamping the turbine guide blade to be processed. This flip-up design allows operators to easily remove or place the turbine guide blade from the clamping device, reducing the complex operating steps and time consumption of traditional clamping methods. Furthermore, the flip-up structure makes the clamping process more flexible, adapting to different shapes and sizes of turbine guide blades, ensuring that the turbine guide blade can be quickly and accurately positioned and clamped. Overall, this design improves clamping efficiency, reduces operational difficulty, and ensures high-precision machining positioning.

[0023] In one possible implementation, the positioning point employs a conformal facet structure. Because the blade profile is precision cast, the positioning surface has high contour accuracy, thus this positioning method effectively improves clamping rigidity while meeting positioning accuracy requirements.

[0024] In this embodiment of the invention, the conformal facet structure of the positioning point effectively improves clamping rigidity while ensuring positioning accuracy. Because the blade profile is precision cast, the positioning surface has a high-precision contour. Therefore, the conformal facet structure can better conform to the turbine guide vane surface, reducing local unevenness in the contact area and avoiding stress concentration. This enhances clamping stability and rigidity while ensuring accurate positioning. This method effectively improves the clamping force during machining, preventing deformation or displacement of the turbine guide vane and ensuring high-precision machining quality and repeatability.

[0025] In one possible implementation, the outer ring floating support 1 and the inner ring floating support 11 adopt a spatially adjustable structure to accommodate slight deviations between the turbine guide vane to be processed and the contact surface. This allows the floating support to fit tightly against the turbine guide vane profile, improving the rigidity of the floating clamping.

[0026] In this embodiment of the invention, the outer ring floating support 1 and the inner ring floating support 11, with their spatially adjustable structure, can adapt to subtle deviations between different turbine guide vanes and the contact surface, thereby ensuring that the floating support always fits tightly against the turbine guide vane profile. This design improves the rigidity of the floating support and avoids displacement or deformation of the turbine guide vane during processing due to uneven support. Simultaneously, it allows for adjustment of the support position according to the shape and size of different turbine guide vanes, providing a more uniform force distribution, enhancing the stability and adaptability of the clamping device, and ensuring processing accuracy and turbine guide vane stability during processing.

[0027] In one possible implementation, resin material is deposited on the pressing surfaces of the first guide pressing mechanism 2 and the second guide pressing mechanism 13. After pressing, the resin material undergoes plastic deformation within a certain range, avoiding the difference in pressing position of each piece due to the deviation of the casting, and improving the repeatability accuracy.

[0028] In this embodiment of the invention, resin material is deposited on the clamping surface of the second guide clamping mechanism 13. During the clamping process, the plastic deformation of the resin adapts to minor deviations in the casting, preventing inconsistent clamping positions of each turbine guide blade due to casting manufacturing errors. This design effectively improves the repeatability of positioning during clamping, ensuring consistent accuracy in each clamping operation, reducing potential errors during processing, and thus ensuring the stability and reliability of processing quality.

[0029] In one possible implementation, the clamping surface of the Z-shaped pressure plate 4 is machined according to the shape of the turbine guide vane to be processed. This allows for a better fit to the clamping surface of the turbine guide vane, preventing damage to the positioning accuracy of the positioning surface due to poor fit of the clamping surface.

[0030] In this embodiment of the invention, by processing the clamping surface of the Z-shaped pressure plate 4 according to the shape of the turbine guide vane to be processed, a better fit between the clamping surface and the surface of the turbine guide vane can be ensured. This customized design avoids uneven force distribution caused by unevenness or poor fit of the clamping surface, thereby effectively protecting the accuracy of the positioning surface and preventing positioning errors. This not only improves the stability and accuracy of clamping, but also ensures high-precision positioning during processing, reduces processing errors caused by clamping problems, and ensures the consistency and reliability of the final processing results.

[0031] In one possible implementation, both the outer ring clamping seat 5 and the inner ring clamping seat 12 are provided with corresponding first guide clamping mechanisms 2. Pressure is applied evenly through the first guide clamping mechanisms 2 to ensure that the turbine guide vane edge plate surfaces are evenly attached.

[0032] In this embodiment of the invention, by providing corresponding first guiding and clamping mechanisms 2 on the outer ring clamping seat 5 and the inner ring clamping seat 12, pressure can be applied evenly, ensuring that the blade surfaces of the turbine guide vane fit uniformly during processing. This design avoids uneven clamping caused by excessive or insufficient local pressure, ensuring that the turbine guide vane receives uniform support force during clamping, thereby improving processing accuracy and the stability of the turbine guide vane. The uniform pressure distribution also reduces the risk of turbine guide vane deformation, ensuring accuracy and repeatability during processing, and contributing to improved overall processing quality and efficiency.

[0033] In one possible implementation, the blade ruler 8 has an adjustable structure for adjustment according to the different dimensions of the turbine guide vanes to be processed.

[0034] In this embodiment of the invention, the adjustable blade ruler 8 can be flexibly adjusted according to the different dimensions of the turbine guide vanes to be processed. This design provides a high degree of adaptability, enabling the same device to handle turbine guide vanes of different sizes and shapes, avoiding inaccurate clamping problems caused by differences in turbine guide vane dimensions. By precisely adjusting the position of the blade ruler, it can be ensured that the main positioning surface of each turbine guide vane is accurately supported, thereby improving the positioning accuracy and consistency during the processing. This not only improves the convenience of clamping but also ensures processing accuracy and reduces errors caused by dimensional differences.

[0035] In one possible implementation, the relative position between the ball-head locating pin 6 and the axial locating seat 7 is adjustable to accommodate different shapes of turbine guide vanes to be processed.

[0036] In this embodiment of the invention, by making the relative position between the ball-end locating pin 6 and the axial locating seat 7 adjustable, precise adjustments can be made according to the shape of different turbine guide vanes to be processed. This flexible adjustment method ensures accurate master positioning regardless of the shape of the turbine guide vane, thereby guaranteeing that the turbine guide vane maintains correct axial positioning throughout the processing. This not only improves processing accuracy but also enhances the adaptability and versatility of the clamping device, allowing the same device to handle different types of turbine guide vanes, reducing positioning errors caused by shape differences, and ensuring consistent processing quality.

[0037] In one possible implementation, the limiting pin 14 is connected by an elastic element, so that the limiting pin 14 adapts to the size changes of the turbine guide vane to be processed within a certain range.

[0038] In this embodiment of the invention, by connecting the limiting pin 14 to the elastic element, the limiting pin can adapt to changes in the size of the turbine guide vane to be processed within a certain range. This design improves the adaptability and flexibility of the clamping device, effectively handling minute changes in the size of the turbine guide vane and ensuring precise positioning each time it is clamped, avoiding positioning errors caused by size differences. Simultaneously, the application of the elastic element reduces excessive pressure on the turbine guide vane, preventing deformation due to excessive tightness or looseness during clamping, thereby improving clamping accuracy and the stability of the processing.

[0039] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the protection scope of the present invention.

Claims

1. A clamping device for machining the rim plate of a gas turbine guide vane, characterized in that, include: Outer ring floating support, first guide clamping mechanism, C-type clamping screw, Z-type pressure plate, outer ring clamping seat, ball head locating pin, axial locating seat, knife edge ruler, outer ring locating seat, inner ring locating seat, inner ring floating support, inner ring clamping seat, second guide clamping mechanism, limit pin, blade clamping seat, stop block and connecting rod; The blade and the ball-head locating pin on the axial locating seat support the turbine guide vane to be machined, thereby achieving main positioning and positioning of the turbine guide vane in the inlet and outlet directions. The outer ring positioning seat, the outer ring clamping seat, the first guide clamping mechanism, the C-type clamping screw, and the Z-type pressure plate are connected together and combined with the outer ring floating support to apply a lateral support force to the turbine guide vane to be processed, so that the turbine guide vane to be processed is in close contact with the air inlet side positioning point of the outer ring of the profile. The inner ring positioning seat, the inner ring clamping seat, the first guide clamping mechanism, the C-type clamping screw, and the Z-type pressure plate are connected together and combined with the inner ring floating support to apply a lateral support force to the turbine guide vane to be processed, so that the turbine guide vane to be processed is in close contact with the inner ring air inlet side positioning point of the profile. The blade clamping seat, the limiting pin, the second guide clamping mechanism, the connecting rod, and the stop block apply a downward clamping force to the blade of the turbine guide vane to be processed, so that the main positioning surface of the turbine guide vane to be processed is in close contact with the turbine guide vane profile positioning point and axial positioning point.

2. The gas turbine guide vane rim plate machining clamping device according to claim 1, characterized in that, The blade clamping seat, the limiting pin, the second guide clamping mechanism, the connecting rod, and the stop block form a flip-up structure, which facilitates the clamping of the turbine guide blade to be processed.

3. The gas turbine guide vane rim plate machining clamping device according to claim 1, characterized in that, The positioning points adopt a conformal facet structure.

4. The gas turbine guide vane rim plate machining clamping device according to claim 1, characterized in that, The outer ring floating support and the inner ring floating support adopt a spatially adjustable structure to accommodate the slight deviations between the turbine guide vane to be processed and the contact surface.

5. The gas turbine guide vane rim plate machining clamping device according to claim 1, characterized in that, Resin material is deposited on the pressing surfaces of the first and second guide pressing mechanisms. After pressing, the resin material undergoes plastic deformation within a certain range to avoid differences in the pressing position of each piece due to the deviation of the casting.

6. The gas turbine guide vane rim plate machining clamping device according to claim 1, characterized in that, The pressing surface of the Z-shaped pressure plate is processed according to the shape of the turbine guide vane to be processed.

7. The gas turbine guide vane rim plate machining clamping device according to claim 1, characterized in that, Both the outer ring clamping seat and the inner ring clamping seat are provided with corresponding first guide clamping mechanisms. Pressure is applied evenly through the first guide clamping mechanisms to ensure that the turbine guide vane edge plate surfaces are evenly fitted.

8. The gas turbine guide vane rim plate machining clamping device according to claim 1, characterized in that, The blade ruler has an adjustable structure, which can be adjusted according to the different dimensions of the turbine guide vanes to be processed.

9. The gas turbine guide vane rim plate machining clamping device according to claim 1, characterized in that, The relative position between the ball-head locating pin and the axial locating seat is adjustable, and can be adjusted according to the different shapes of the turbine guide vanes to be processed.

10. The gas turbine guide vane rim plate machining clamping device according to claim 1, characterized in that, The limiting pin is connected by an elastic element, which allows the limiting pin to adapt to changes in the size of the turbine guide vane to be processed within a certain range.

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