A gas turbine compressor stator vane ring wire cutting device and method

Abstract

The application discloses a gas turbine compressor stator vane ring linear cutting processing device and method, and relates to the field of gas turbine compressor stator vane ring linear cutting processing device and method. The outer diameter of the annular positioning stopper is matched with the outer ring outer diameter of the stator vane ring; the first U-shaped avoiding groove and the second U-shaped avoiding groove are arranged in the outer cylindrical surface of the base from the inside to the outside; the first U-shaped avoiding groove and the second U-shaped avoiding groove are distributed in a 180-degree rotational symmetry along the circumference of the annular positioning stopper; the same groove edge of the first U-shaped avoiding groove and the second U-shaped avoiding groove is uniformly arranged with an outer ring cutting collision block and an inner ring cutting collision block; the outer ring cutting collision block is located on the outside of the annular positioning stopper, and the inner ring cutting collision block is located on the inside of the annular positioning stopper; one end of the outer ring cutting collision block and the inner ring cutting collision block is respectively provided with an outer ring collision inclined surface and an inner ring collision inclined surface; the angle of the outer ring collision inclined surface is consistent with the angle of the cutout of the outer ring to be cut; and the angle of the inner ring collision inclined surface is consistent with the angle of the cutout of the inner ring to be cut. The application aims to realize the processing of different cutout angles of the inner ring and the outer ring of the stator vane ring, improve the cutout size and the cutout angle precision, and further improve the assembly quality of the components and avoid quality risks.

Description

Technical Field

[0001] This invention belongs to the field of gas turbine compressor stator ring processing, specifically relating to a wire cutting processing device and method for gas turbine compressor stator rings. Background Technology

[0002] Among the core components of a gas turbine, the machining accuracy of the compressor stator ring directly affects the overall performance of the gas turbine. Currently, gas turbine compressor stator rings generally adopt a split structure design. While this design facilitates installation and maintenance, it also presents challenges to the machining process. Specifically, there is an inconsistency in the wire cutting angles between the inner and outer rings of the stator ring, determined by the specific geometry of the stator ring and its operational requirements within the gas turbine. However, in existing wire cutting processes, to accommodate this angle difference, it is often necessary to deflect the molybdenum wire to adjust the cutting direction. This operation is particularly difficult in the 0° and 180° directions, as the cut size and angle in these directions are easily affected by the deflection of the molybdenum wire, leading to increased machining deviations. These machining deviations not only directly affect the dimensional and angle accuracy of the stator ring but also indirectly negatively impact the assembly quality of the components. Furthermore, inaccurate cutting may damage the stator itself.

[0003] Therefore, how to effectively solve the processing deviation problem caused by inconsistent angles during the wire cutting of stationary blade rings, improve the processing accuracy of the cut size and cut angle, thereby improving the assembly quality of the components and avoiding potential quality risks, has become an urgent technical problem to be solved in the current gas turbine compressor stationary blade ring processing field. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a gas turbine compressor stator ring wire cutting processing device and method, the purpose of which is to realize the processing of the inner ring and outer ring of the stator ring with different cutting angles, improve the cutting size and cutting angle accuracy, thereby improving the assembly quality of the components and avoiding quality risks.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] According to a first aspect of the present invention, a gas turbine compressor stator ring wire cutting processing device is provided, comprising a base, wherein an annular positioning stop is provided on the upper end face of the base, and the inner diameter of the annular positioning stop matches the outer diameter of the outer ring of the stator ring.

[0007] The base has a first U-shaped clearance groove and a second U-shaped clearance groove opened from the outer column surface inward. The first U-shaped clearance groove and the second U-shaped clearance groove are symmetrically distributed at 180° rotation along the circumference of the annular positioning stop.

[0008] The first U-shaped clearance groove and the second U-shaped clearance groove are evenly provided with outer ring cutting and contacting blocks and inner ring cutting and contacting blocks on the same groove side. The outer ring cutting and contacting blocks are located outside the annular positioning stop, and the inner ring cutting and contacting blocks are located inside the annular positioning stop.

[0009] One end of the outer ring cutting wire contact block and the inner ring cutting wire contact block are respectively provided with an outer ring wire contact inclined surface and an inner ring wire contact inclined surface. The angle of the outer ring wire contact inclined surface is consistent with the cutting angle of the outer ring to be cut, and the angle of the inner ring wire contact inclined surface is consistent with the cutting angle of the inner ring to be cut.

[0010] In one possible implementation of the first aspect, the upper surface of the outer ring contact wire bevel is located at the center within the annular positioning stop. The cut size of the outer ring refers to the vertical distance between the bottom end of the outer ring cut bevel and the first reference line. The reference line refers to the straight line where the outer ring design engraving line of the stationary leaf ring is located after moving 90° along the circumference of the outer ring.

[0011] The upper end face of the inner ring contact wire inclined surface is provided with several pressure plate structures on the outer periphery of the annular positioning stop. The pressure plate structures are used to axially limit the outer ring of the stationary blade ring.

[0012] In one possible implementation of the first aspect, the pressure plate structure includes a pressure plate, a first support rod, and a second support rod. The first support rod is detachably connected to the upper end face of the base. The pressure plate has an elongated hole through which the upper end of the first support rod passes. An adjusting nut is provided at the upper end of the first support rod. An elastic element is sleeved on the first support rod, with the upper end of the elastic element abutting against the lower end face of the pressure plate and the lower end of the elastic element abutting against the upper end face of the base. A limiting groove is provided on the upper end face of the base, and the lower end of the second support rod is located within the limiting groove. The upper end of the second support rod is vertically and vertically connected to the pressure plate by bolts.

[0013] In one possible implementation of the first aspect, the elastic element is a spring.

[0014] In one possible implementation of the first aspect, the upper surface of the base is provided with several lifting rings.

[0015] In one possible implementation of the first aspect, the upper surface of the base is provided with several weight-reducing holes.

[0016] In one possible implementation of the first aspect, the outer cylindrical surface of the base is provided with a straightened edge, which is used to cooperate with the machine tool positioning structure.

[0017] In one possible implementation of the first aspect, a reference pin is provided on the upper end face of the base, the reference pin being directly opposite the center position of the straightening edge, and the reference pin is used to align with the outer ring design engraving line of the stationary blade ring.

[0018] According to a second aspect of the present invention, a method of using a gas turbine compressor stator ring wire cutting processing device is provided, comprising: installing the stator ring inside an annular positioning stop such that the outer ring of the stator ring contacts the inner wall of the annular positioning stop, and the design engraving line of the outer ring of the stator ring is aligned with the center position of the arc between the first U-shaped relief groove and the second U-shaped relief groove.

[0019] The molybdenum wire is aligned with the outer ring cutting contact block's outer ring contact bevel and discharged to achieve the same angle between the molybdenum wire and the cut angle of the outer ring to be cut. Then, the molybdenum wire is offset by a set distance to complete the cut of the outer ring.

[0020] The molybdenum wire is aligned with the inner ring cutting contact block's inner ring contact slope and discharged to the wire, so that the angle of the molybdenum wire is consistent with the cutting angle of the inner ring to be cut. Then, the molybdenum wire is offset by a set distance to complete the cutting of the inner ring.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] This invention provides a wire cutting processing device for gas turbine compressor stator rings. By setting outer and inner ring wire-cutting blocks with specific angled outer and inner ring wire-cutting bevels on the base, during processing, the molybdenum wire is aligned with the corresponding wire-cutting bevels and discharged, accurately ensuring that the angle of the molybdenum wire matches the cutting angle of the outer or inner ring to be cut. This method avoids processing deviations caused by the deflection of the molybdenum wire in the 0° and 180° directions, improving the processing accuracy of the cutting size and angle, and ensuring that the cutting of the stator ring meets design requirements. Because this invention effectively improves the processing accuracy of the stator ring cutting size and angle, the cuttings of the inner and outer rings of the stator ring can be more precisely matched. During component assembly, precise cutting ensures uniform assembly gaps and tight connections between components, reducing assembly interference or loosening caused by processing deviations, thereby improving the overall assembly quality of the component and allowing the gas turbine compressor stator ring to better perform its function. This invention, by precisely controlling the cut size and angle, avoids damage to the stator blade caused by processing deviations, reduces the probability of stator blade malfunctions during operation, and effectively avoids potential quality risks. The method of use is simple and clear. Operators only need to follow the steps to install the stator blade ring into the annular positioning stop, then sequentially align the molybdenum wire with the wire-connecting bevels of the outer and inner ring cutting wire-connecting blocks to perform electrical discharge wire alignment, and complete the cutting of the corresponding slits.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a gas turbine compressor stator ring wire cutting processing device.

[0026] Figure 2 It is a structural diagram of the part.

[0027] Figure 3 This is a partial schematic diagram of a gas turbine compressor stator ring wire cutting processing device.

[0028] Figure 4 This is a sectional view of a gas turbine compressor stator blade annular wire cutting processing device.

[0029] Figure 5 This is a CC cross-sectional view of a gas turbine compressor stator blade annular wire cutting processing device.

[0030] Figure 6 This is a partial schematic diagram of the cuts on the inner and outer sides of the part.

[0031] Figure 7 This is a schematic diagram of the entire part after machining.

[0032] In the diagram: 1-base; 100-annular positioning stop; 101-first U-shaped clearance groove; 102-second U-shaped clearance groove; 103-straightening edge;

[0033] 2-Outer ring cutting and thread-stopping block; 200-Outer ring thread-stopping bevel;

[0034] 3-Inner ring cutting and thread-stopping block; 300-Inner ring thread-stopping bevel;

[0035] 4-Pressure plate structure; 400-Pressure plate; 401-First support rod; 402-Second support rod; 403-Elastic element;

[0036] 5-Lifting ring; 6-Reference ejector pin; 7-Incision for the outer ring to be cut; 8-Incision for the inner ring to be cut. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 7 As shown, this invention provides a gas turbine compressor stator ring wire cutting processing device, including a base 1. An annular positioning stop 100 is provided on the upper surface of the base 1, and the inner diameter of the annular positioning stop 100 matches the outer diameter of the stator ring. The base 1 has a first U-shaped clearance groove 101 and a second U-shaped clearance groove 102 formed from its outer cylindrical surface inwards. The first U-shaped clearance groove 101 and the second U-shaped clearance groove 102 are symmetrically distributed 180° around the annular positioning stop 100. Outer ring cutting contact blocks 2 and inner ring cutting contact blocks 3 are evenly distributed along the same groove edge of the first U-shaped clearance groove 101 and the second U-shaped clearance groove 102. The outer ring cutting contact blocks 2 are located outside the annular positioning stop 100, and the inner ring cutting contact blocks 3 are located inside the annular positioning stop 100. One end of the outer ring cutting wire contact block 2 and the inner ring cutting wire contact block 3 is respectively provided with an outer ring wire contact inclined surface 200 and an inner ring wire contact inclined surface 300. The angle of the outer ring wire contact inclined surface 200 is consistent with the angle of the cut 7 of the outer ring to be cut, and the angle of the inner ring wire contact inclined surface 300 is consistent with the angle of the cut 8 of the inner ring to be cut.

[0039] Specifically, base 1 is the basic support component of the entire processing device, and the upper surface of base 1 must ensure that its flatness meets the requirements. An annular positioning stop 100 is machined on the upper surface of base 1 according to design requirements. The inner diameter of the annular positioning stop 100 must match the outer diameter of the stationary blade ring to ensure the positioning accuracy of the stationary blade ring during processing. A first U-shaped clearance groove 101 and a second U-shaped clearance groove 102 are formed on base 1 from the outer cylindrical surface inwards. These two U-shaped clearance grooves must be symmetrically distributed at 180° rotational symmetry around the annular positioning stop 100 to ensure uniform force distribution on the stationary blade ring during processing. An outer ring cutting thread stop block 2 and an inner ring cutting thread stop block 3 are installed on the same side of the first U-shaped clearance groove 101 and the second U-shaped clearance groove 102, respectively. The outer ring cutting thread stop block 2 is located on the outside of the annular positioning stop 100, and the inner ring cutting thread stop block 3 is located on the inside of the annular positioning stop 100. During installation, it must be ensured that the connection between the thread stop block and base 1 is reliable. One end of the outer ring cutting thread-stopping block 2 and the inner ring cutting thread-stopping block 3 is processed to form the outer ring thread-stopping inclined surface 200 and the inner ring thread-stopping inclined surface 300, respectively. The angle of the outer ring thread-stopping inclined surface 200 must be consistent with the cutting angle of the outer ring to be cut, and the angle of the inner ring thread-stopping inclined surface 300 must be consistent with the cutting angle of the inner ring to be cut.

[0040] In use, select the gas turbine compressor stator ring to be processed. Mark the design lines on the outer ring of the stator ring according to the design requirements for positioning during processing. Install the stator ring into the annular positioning stop 100, ensuring that the outer ring of the stator ring is in close contact with the inner wall of the annular positioning stop 100. Adjust the position of the stator ring so that the design lines on its outer ring are aligned with the center of the arc between the first U-shaped clearance groove 101 and the second U-shaped clearance groove 102. For example, a positioning tool can be used to assist in positioning the stator ring to ensure positioning accuracy. After positioning, check the position and angle of the stator ring to ensure that it meets the processing requirements.

[0041] Start the wire EDM machine, moving the molybdenum wire to the outer ring contact surface 200 of the outer ring cutting contact block 2. Using the machine's control system, adjust the position and angle of the molybdenum wire to ensure close contact with the outer ring contact surface 200, and trigger the discharge-to-wire function. At this point, the angle of the molybdenum wire will automatically adjust to match the cutting angle of the outer ring to be cut. After confirming that the molybdenum wire angle adjustment is correct, set the offset displacement of the molybdenum wire through the machine's control system and start the cutting program. The molybdenum wire will cut according to the set path and parameters, completing the outer ring cut.

[0042] After completing the outer ring cut, the molybdenum wire is moved to the inner ring cutting contact surface 300 of the inner ring cutting contact block 3. Similarly, the position and angle of the molybdenum wire are adjusted via the machine tool's control system to ensure close contact with the inner ring contact surface 300, triggering the discharge wire alignment function. At this point, the angle of the molybdenum wire will automatically adjust to match the cut angle of the inner ring to be cut. After confirming that the molybdenum wire angle adjustment is correct, the offset displacement of the molybdenum wire is set again via the machine tool's control system, and the cutting program is started. The molybdenum wire will cut according to the set path and parameters, completing the inner ring cut.

[0043] As can be seen from the above description of the embodiments, the gas turbine compressor stator ring wire cutting processing device of the present invention can effectively solve the processing deviation problem caused by inconsistent angles during the stator ring wire cutting process, improve the processing accuracy of the cut size and cut angle, thereby improving the assembly quality of components and avoiding quality risks.

[0044] In one feasible implementation, the design of the outer ring cutting contact block 2 and the inner ring cutting contact block 3 needs to be determined based on the cut size and angle of the stationary blade ring. The vertical distance from the plane containing the outer ring contact surface 200 to the center of the positioning surface must be equal to the cut size of the outer ring, and the vertical distance from the plane containing the inner ring contact surface 300 to the center of the positioning surface must be equal to the cut size of the inner ring. The cut size of the outer ring is defined as the vertical distance between the bottom end of the outer ring cut surface and the first reference line, where the first reference line is the straight line where the outer ring design graduation line of the stationary blade ring is located after moving 90° circumferentially along the outer ring. The cut size of the inner ring is defined as the vertical distance between the bottom end of the inner ring cut surface and the second reference line, where the second reference line is the straight line where the first reference line is located after moving radially to the inner ring of the stationary blade ring.

[0045] In one possible implementation, the upper end face of the base 1 is provided with several pressure plate structures 4 around the annular positioning stop 100. The pressure plate structures 4 are used to axially limit the outer ring of the stationary blade ring to ensure that the stationary blade ring will not move axially during the processing, thereby ensuring the processing accuracy.

[0046] The pressure plate structure 4 includes a pressure plate 400, a first support rod 401, and a second support rod 402. The pressure plate 400 is made of high-strength metal material, such as stainless steel or alloy steel, to ensure it can withstand the pressure and vibration during processing. The first support rod 401 is a component detachably connected to the upper surface of the base 1, and its upper end is equipped with an adjusting nut for adjusting the height of the pressure plate 400. An elastic element 403 is sleeved on the first support rod 401; in this embodiment, the elastic element 403 is a spring, with its upper end abutting against the lower surface of the pressure plate 400 and its lower end abutting against the upper surface of the base 1. The lower end of the second support rod 402 is located within a limiting groove on the upper surface of the base 1, and its upper end is vertically connected to the pressure plate 400 via bolts. The design of the limiting groove allows the second support rod 402 to move radially within a certain range, so as not to interfere with the pressure plate 400 when assembling or disassembling the stationary blade ring.

[0047] Several pressure plate structures 4 are evenly arranged on the upper surface of the base 1, around the annular positioning stop 100, according to design requirements. The number and position of the pressure plate structures 4 need to be determined based on the size and shape of the stationary blade ring to ensure that they can evenly limit the axial movement of the outer ring of the stationary blade ring. During installation, it is necessary to ensure that the connection between the first support rod 401 and the upper surface of the base 1 is firm and reliable, the spring is correctly installed, and the pressure plate 400 can rise and fall freely without jamming. After installation, the pressure plate structures 4 need to be adjusted by rotating the adjusting nut to adjust the height of the pressure plate 400 so that it is in close contact with the upper surface of the outer ring of the stationary blade ring, but without applying excessive pressure that could deform the stationary blade ring.

[0048] After the stationary vane ring is installed within the annular locating stop 100, the height of the pressure plate 400 of the pressure plate structure 4 is adjusted to axially limit the outer ring of the stationary vane ring. The contact between the pressure plate 400 and the upper end face of the outer ring of the stationary vane ring should be uniform and tight to prevent axial movement of the stationary vane ring during processing. During wire EDM, the pressure plate structure 4 effectively restricts the axial movement of the stationary vane ring, ensuring processing accuracy. After the wire EDM is completed, the adjusting nut is loosened, the pressure plate 400 is raised, and the processed stationary vane ring is removed.

[0049] In one possible implementation, a number of lifting rings 5 ​​are provided on the upper surface of the base 1. The shape and size of the lifting rings 5 ​​need to be designed according to actual usage requirements. Generally, the lifting rings 5 ​​have a large inner diameter to facilitate the insertion and fixing of lifting ropes or hooks. At the same time, the outer surface of the lifting rings 5 ​​should be smooth without sharp corners to avoid damage to the ropes or hooks during lifting. On the upper surface of the base 1, the installation positions of the lifting rings 5 ​​are determined according to the principles of lifting balance and ease of operation. Generally, the lifting rings 5 ​​should be evenly distributed around the upper surface of the base 1 to ensure balance and stability during lifting. When it is necessary to move the base 1, the lifting ropes or hooks are inserted into the lifting rings 5 ​​and secured firmly. Then, lifting equipment (such as overhead cranes, forklifts, etc.) is used to lift the base 1 and move it to the designated position.

[0050] As can be seen from the detailed description of the above specific embodiments, the lifting ring structure in the gas turbine compressor stationary blade ring wire cutting processing device of the present invention can effectively facilitate the lifting and moving of the base 1, thereby improving the flexibility of the device.

[0051] In one possible implementation, the upper surface of the base 1 has several weight-reduction holes. It should be noted that the primary design principle for these weight-reduction holes is to minimize the weight of the base 1 while ensuring that the overall structural strength and rigidity of the base 1 meet the requirements of the wire EDM processing device. This reduces transportation costs and installation difficulty. The weight-reduction holes are evenly distributed to prevent vibration or deformation of the base 1 during processing due to uneven weight distribution, which could affect processing accuracy.

[0052] The shape of the weight-reducing holes can be selected according to the structural characteristics and processing technology of the base 1. For example, the shape can be circular, square, rectangular, etc. In this embodiment, circular weight-reducing holes are selected. The weight-reducing holes should be evenly distributed on the upper surface of the base 1, avoiding concentration in a certain area. For the area around the annular positioning stop 100 and near the installation areas of key components such as the pressure plate structure 4 and the lifting ring 5, the distribution of the weight-reducing holes needs to be appropriately adjusted to ensure that the structural strength of these key areas is not affected.

[0053] In one implementation, the outer cylindrical surface of the base 1 is provided with a straightened edge 103, which is used to mate with the machine tool positioning structure. The purpose of the straightened edge 103 is to ensure that the base 1 can achieve a stable fit with the machine tool positioning structure, thereby ensuring the installation accuracy of the entire wire EDM machining device on the machine tool and improving the machining accuracy of the stationary blade ring. When installing the base 1 onto the machine tool, first align the straightened edge 103 with the machine tool positioning structure, and push the base 1 to make the straightened edge 103 mate with the machine tool positioning structure.

[0054] In one implementation, a reference pin 6 is provided on the upper surface of the base 1, directly opposite the center of the straightening edge 103. The reference pin 6 is used to align with the outer ring design lines of the stationary blade ring. The reference pin 6 ensures precise alignment with the outer ring design lines of the stationary blade ring, providing an accurate positioning reference for the wire EDM machining of the stationary blade ring. The design of the reference pin 6 must be coordinated with the overall structure of the base 1 and must not affect the functionality of other components on the base 1.

[0055] The reference ejector pin 6 must be directly aligned with the center of the straightening edge 103. Before wire cutting the stationary blade ring, place the stationary blade ring on the annular positioning stop 100 of the base 1, and axially limit the stationary blade ring through the pressure plate structure 4. Rotate the stationary blade ring so that the design markings on the outer ring of the stationary blade ring are aligned with the top of the reference ejector pin 6. The reference ejector pin 6 being directly aligned with the center of the straightening edge 103 ensures that the positioning accuracy of the base 1 on the machine tool and the positioning accuracy of the stationary blade ring on the base 1 are correlated, thereby guaranteeing the positioning accuracy of the entire wire cutting system. During installation and debugging, it is necessary to ensure the fitting accuracy between the straightening edge 103 and the machine tool positioning structure, as well as the alignment accuracy between the reference ejector pin 6 and the design markings on the outer ring of the stationary blade ring. The two coordinate with each other to ensure the machining accuracy.

[0056] Example

[0057] (1) Scribing: Using a scribing tool, scribing a vertical line on the outer circle of the stationary leaf ring, i.e., the outer ring design scribing line ( Figure 2 This serves as the angular alignment reference for wire cutting.

[0058] (2) Assembly: Assemble the stationary blades into the inner ring in a clockwise direction according to their sequence number. Wrap the blades together with the inner ring with a rubber band and slowly insert them into the mortise grooves of the corresponding sequence number on the outer ring. Tap the tenon of each blade until it is flush with the end face of the outer ring.

[0059] (3) Design and fabrication of the device:

[0060] The bottom of the device is equipped with a U-shaped clearance groove ( Figure 3 To avoid obstructing the molybdenum wire's operating stroke and increase operability; the flatness of the device's positioning surface is no greater than 0.02mm, and the perpendicularity of the positioning stop to the positioning surface is no greater than 0.02mm;

[0061] The thread-stopping block is designed based on the two cuts on the inner and outer sides of the stationary blade ring, so that the angle of the thread-stopping block is consistent with the angle of the part cut, that is, the outer ring cuts the thread-stopping block at angle β1. Figure 5 ) and the cutting angle β2 of the outer ring to be cut Figure 6 ) consistent, inner ring cutting wire block 3 angle α1 ( Figure 4 ) and the cutting angle α2 of the inner ring to be cut Figure 6 (Same as above)

[0062] Design of the contact wire block position: The vertical distance from the plane of the outer ring contact wire bevel 200 to the center of the positioning surface is equal to the cut size of the outer ring. The center of the positioning surface refers to the center of the upper end face of the base 1 within the annular positioning stop 100. The cut size of the outer ring refers to the vertical distance from the bottom end of the outer ring cut bevel to the first reference line. The reference line refers to the straight line where the outer ring design engraving line of the stationary blade ring is located after moving 90° circumferentially along the outer ring. The vertical distance from the plane of the inner ring contact wire bevel 300 to the center of the positioning surface is equal to the cut size of the inner ring. The cut size of the inner ring refers to the vertical distance from the bottom end of the inner ring cut bevel to the second reference line. The second reference line refers to the straight line where the first reference line is located after moving radially to the inner ring of the stationary blade ring. Figure 4 , 5 ).

[0063] (4) Clamping: Assemble the stationary blade ring into the positioning stop of the device, and adjust the outer circle design line of the outer ring to align with the ejector pin. Figure 1 The clamping edge is straightened at an angle, and the pressure plate presses the part tightly in sequence to achieve a secure fit. After clamping, a feeler gauge is used to check the gap between the part and the positioning surface N to ensure that it is no greater than 0.02mm. The angle of the upper and lower wire arms of the wire EDM machine is adjusted so that the molybdenum wire contacts and aligns with the outer ring wire contacting inclined surface 20 of the outer ring cutting contact block 2 and discharges the wire. The angle of the molybdenum wire is adjusted to be consistent with the outer cut angle of the part, and the molybdenum wire is offset by 1mm. Figure 4 , 5 The outer cutting, i.e., the outer ring cut, is completed. During the inner cutting, the molybdenum wire is aligned with the inner ring cutting contact block 3's inner ring contact slope 300 and discharged. The angle of the molybdenum wire is adjusted to match the inner cut angle of the part, and the molybdenum wire is offset by 1mm. Figure 4 , 5 Complete the inner cut. Adjust the turntable and perform the same steps to complete the inner and outer cuts at the 180° position.

[0064] (5) Machining: Cutting tests were conducted using test plates of the same material. The tests showed that when the part thickness was 5mm–20mm, the electrical parameters of the pulse power supply were: pulse width 4–20μs, machining current 0.8–2A, pulse amplitude 60–80V, and cutting speed 15–40mm / min. The surface roughness of the part could reach Ra1.6–Ra3.2μm. For example, using pulse power supply parameters of 12μs pulse width, 1A machining current, 60V pulse amplitude, and 30mm / min, the inner and outer sides were cut respectively. The same steps were performed to complete the inner and outer cuts at a 180° position.

[0065] This method, applied to the design and fabrication of a circular wire cutting device for the stationary blades of a split-type casing, avoids inconsistencies in cut size and angle caused by the deflection of the molybdenum wire, and controls angular deviation within 0.05mm, thereby improving component assembly accuracy. Its fabrication device and method offer valuable insights for similar circular wire cutting processes of stationary blades.

[0066] This invention features detachable outer and inner ring cutting wire contact blocks, allowing for easy and quick replacement. The wire contact blocks can be replaced with blocks of appropriate angles to accommodate different cutting angles, offering strong versatility. A U-shaped clearance groove facilitates the operation of the molybdenum wire, ensuring operability. The ejector pin, in conjunction with the straightening edge, controls angular deviation within 0.05mm. The surface finish of the machined parts can reach Ra3.2μm. This invention can be widely applied to the design of wire EDM devices for similar ring-shaped parts and the selection of processing parameters.

[0067] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, 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, and should all be covered within the scope of protection of the present invention.

Claims

1. A gas turbine compressor stator blade annular wire cutting processing device, characterized in that, Includes a base (1), and an annular positioning stop (100) is provided on the upper end surface of the base (1). The inner diameter of the annular positioning stop (100) matches the outer diameter of the outer ring of the stationary leaf ring. The base (1) has a first U-shaped clearance groove (101) and a second U-shaped clearance groove (102) opened inward from the outer column surface. The first U-shaped clearance groove (101) and the second U-shaped clearance groove (102) are symmetrically distributed at 180° around the annular positioning stop (100). The first U-shaped clearance groove (101) and the second U-shaped clearance groove (102) are provided with an outer ring cutting wire block (2) and an inner ring cutting wire block (3) evenly distributed on the same groove side. The outer ring cutting wire block (2) is located outside the annular positioning stop (100), and the inner ring cutting wire block (3) is located inside the annular positioning stop (100). One end of the outer ring cutting wire block (2) and the inner ring cutting wire block (3) is provided with an outer ring wire-touching inclined surface (200) and an inner ring wire-touching inclined surface (300), respectively. The angle of the outer ring wire-touching inclined surface (200) is consistent with the cutting angle of the outer ring to be cut, and the angle of the inner ring wire-touching inclined surface (300) is consistent with the cutting angle of the inner ring to be cut.

2. The gas turbine compressor stator blade annular wire cutting processing device according to claim 1, characterized in that, The vertical distance from the plane of the outer ring thread-touching inclined surface (200) to the center of the positioning surface is equal to the cut size of the outer ring. The center of the positioning surface refers to the center of the upper end face of the base (1) located in the annular positioning stop (100). The cut size of the outer ring refers to the vertical distance between the bottom end of the outer ring cut inclined surface and the first reference line. The first reference line refers to the straight line where the outer ring design engraving line of the stationary leaf ring is located after moving 90° along the circumference of the outer ring. The vertical distance from the plane of the inner ring thread-touching inclined surface (300) to the center of the positioning surface is equal to the cut size of the inner ring. The cut size of the inner ring refers to the vertical distance between the bottom of the inner ring cut inclined surface and the second reference line. The second reference line refers to the straight line where the first reference line is located after moving radially to the inner ring of the stationary blade ring.

3. The gas turbine compressor stator blade annular wire cutting processing device according to claim 1, characterized in that, The upper end face of the base (1) is provided with several pressure plate structures (4) on the outer periphery of the annular positioning stop (100). The pressure plate structures (4) are used to axially limit the outer ring of the stationary blade ring.

4. The gas turbine compressor stator blade annular wire cutting processing device according to claim 3, characterized in that, The pressure plate structure (4) includes a pressure plate (400), a first support rod (401) and a second support rod (402). The first support rod (401) is detachably connected to the upper end face of the base (1). The pressure plate (400) has an elongated hole. The upper end of the first support rod (401) passes through the elongated hole. An adjusting nut is provided at the upper end of the first support rod (401). An elastic element (403) is sleeved on the first support rod (401). The upper end of the elastic element (403) abuts against the lower end face of the pressure plate (400), and the lower end of the elastic element (403) abuts against the upper end face of the base (1). A limiting groove is provided on the upper end face of the base (1). The lower end of the second support rod (402) is located in the limiting groove. The upper end of the second support rod (402) is connected to the pressure plate (400) by bolts.

5. The gas turbine compressor stator blade annular wire cutting processing device according to claim 4, characterized in that, The elastic element (403) is a spring.

6. The gas turbine compressor stator blade annular wire cutting processing device according to claim 1, characterized in that, Several hanging rings (5) are provided on the upper surface of the base (1).

7. The gas turbine compressor stator ring wire cutting processing device according to claim 1, characterized in that, Several weight-reducing holes are provided on the upper surface of the base (1).

8. The gas turbine compressor stator blade annular wire cutting processing device according to claim 1, characterized in that, The outer cylindrical surface of the base (1) is provided with a straight edge (103), which is used to cooperate with the machine tool positioning structure.

9. The gas turbine compressor stator blade annular wire cutting processing device according to claim 8, characterized in that, A reference pin (6) is provided on the upper surface of the base (1). The reference pin (6) is directly opposite the center position of the straight edge (103). The reference pin (6) is used to align with the outer ring design line of the stationary blade ring.

10. A method of using the gas turbine compressor stator ring wire cutting processing device according to any one of claims 1 to 9, characterized in that, include: The stationary blade ring is installed in the annular positioning stop (100) so that the outer ring of the stationary blade ring contacts the inner wall of the annular positioning stop (100), and the design engraving line of the outer ring of the stationary blade ring is directly opposite the center position of the arc between the first U-shaped relief groove (101) and the second U-shaped relief groove (102). Make the molybdenum wire contact the outer ring wire contacting bevel (200) of the outer ring cutting wire contacting block (2) and discharge the wire to make the angle of the molybdenum wire consistent with the cutting angle of the outer ring to be cut. Then, the molybdenum wire is offset by a set distance to complete the cutting of the outer ring. Make the molybdenum wire contact the inner ring wire contacting inclined surface (300) of the inner ring cutting wire contacting block (3) and discharge the wire to achieve the same angle of the molybdenum wire as the cutting angle of the inner ring to be cut. Then, the molybdenum wire is offset by a set distance to complete the cutting of the inner ring.

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