Outer ring and vane assembly machining apparatus and method of use

Abstract

An outer ring and vane combined machining device and a using method, comprising a body, a pressing plate, a supporting ring, a third support and a ring-shaped part; the body is a ring-shaped base, the supporting ring is fixed with the body through a plurality of third supports, a plurality of threaded holes are radially arranged on the supporting ring, and a vane is fixed on each threaded hole through a screw; the ring-shaped part is pressed on the whole set of vanes, the ring-shaped part is provided with a pressing plate for axially pressing the vanes. The device can ensure the correctness of the assembly position of the whole set of vanes during combined turning, avoid the phenomenon of vane position deviation and vibration during combined machining, improve the machining efficiency and quality, and solve the problems of inconvenient disassembly of the combined part, easy falling off and damage of the vanes during turnover transportation and storage in the warehouse.

Description

Technical Field

[0001] This invention belongs to the field of gas turbine manufacturing, and specifically relates to a processing device for the combination of outer ring and blade and its usage method. Background Technology

[0002] A certain gas turbine blade ring consists of an outer ring and blades. The outer ring is made of 2Cr12 and is a complete circular ring structure with 54 tenons and slots, each corresponding to one of the 54 blades. In the initial processing of the outer ring and blade assembly, the clamping device was relatively simple, resulting in unreliable radial and axial positioning of the blades relative to the outer ring. During assembly, the blade tenons were prone to shifting within the tenons. Furthermore, the chip-breaking turning process often caused tool vibration and damage to the parts, making dimensional accuracy difficult and increasing processing challenges. Secondly, the lack of a disassembly mechanism after the assembly was installed in the fixture made lifting and disassembly difficult. Finally, after processing, the blades and outer ring were not fixed during transit, finished product inspection, and warehousing, leading to problems such as blade detachment and damage, and incorrect assembly sequence. Summary of the Invention

[0003] The purpose of this invention is to provide a processing device and method for combining an outer ring and a blade, so as to solve the problems of high processing difficulty and high disassembly and hoisting difficulty.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A processing device for an outer ring and blade assembly includes a body, a pressure plate, a support ring, a third support, and an annular component. The body is an annular base, and the support ring is fixed to the body by several third supports. Several threaded holes are radially arranged on the support ring, and a blade is fixed to each threaded hole by a screw. The annular component presses on the entire ring of blades, and a pressure plate is provided on the annular component for axially pressing the blades.

[0006] Furthermore, the pressure plate includes a first pressure plate, a second pressure plate, and a long pressure plate; the first pressure plate is disposed on the outer circle side of the annular part and is used to press the outer circle of the annular part; the long pressure plate is disposed on the inner circle side of the annular part and is used to press the inner circle side of the annular part; the second pressure plate is disposed on the outer end face of the outer ring of the blade and is used to press the outer ring of the blade.

[0007] Furthermore, a first support is provided on the main body, and a second pressure plate is fixed to the first support by bolts, with the edge of the second pressure plate pressing against the outer end face of the outer ring of the blade.

[0008] Furthermore, a second support is provided on the main body, and the first pressure plate is fixed to the second support by bolts, with the edge of the first pressure plate pressing against the outer circle of the annular part.

[0009] Furthermore, the long pressure plate is fixed to the body by bolts, and the end of the long pressure plate presses against the inner circle side of the annular part.

[0010] Furthermore, the third support is an L-shaped support; the third support and the support ring are fixed together by the first bolt.

[0011] Furthermore, the support ring is equipped with several lifting rings.

[0012] Furthermore, during lifting, the blade tip is bolted to the upper and lower clamping plates at the connection point with the support ring.

[0013] Furthermore, both the upper and lower clamping plates are curved plates.

[0014] Furthermore, a method of using an outer ring and blade combination processing device includes the following steps:

[0015] Place the lower outer diameter of the outer ring to be processed into the fixture stop of the body;

[0016] The blade tip is installed at the threaded hole of the support ring;

[0017] The annular component presses against the blade, and the first pressure plate presses against the end face of the annular component from the outer circle.

[0018] After the inner shape of the workpiece is machined, the first pressure plate of the outer ring is removed and replaced with the two long pressure plates of the inner ring to press the end face of the ring part.

[0019] After the workpiece is processed, fix the upper clamping plate, the lower clamping plate and the blade end, and remove the first bolt that fixes the third support.

[0020] The support ring for fixing the blades, the third support, the upper clamping plate, and the lower clamping plate are disassembled from the device base together using the lifting ring.

[0021] Loosen the blade fixing screws on the support ring and disassemble the assembly.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] The device of the present invention can ensure the correct assembly position when the entire set of blades is machined, avoid the phenomenon of blade position displacement and vibration during assembly processing, improve processing efficiency and quality; and solve the problems of inconvenient disassembly of the assembly and the easy loss and damage of blades due to the lack of fixation of the entire set of blades during turnover, transportation and storage.

[0024] The method of this invention reduces the workload of assembly and adjustment before combined machining. The device ensures complete fixation of the blade's axial and radial directions during combined turning, solving the problems of blade position movement and vibration during combined machining, which cause tool breakage and difficulty in ensuring dimensions. It also significantly improves the tool life and machining efficiency, and achieves stable machining of the outer ring and blade. It solves the problem of difficulty in hoisting and disassembling the assembled parts after clamping and machining. It also solves the problem of blades easily falling off the outer ring during turnover transportation, finished product inspection, and warehousing, causing blade damage and disordered assembly sequence. Attached Figure Description

[0025] Figure 1 This is a top view of the device of the present invention;

[0026] Figure 2 Here is a schematic diagram of the outer ring and blade assembly: (a) sectional view, (b) top view;

[0027] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0028] Figure 4 yes Figure 1 A schematic diagram of the sectional rotational structure at point BB;

[0029] Figure 5 yes Figure 1 A cross-sectional view of the rotated structure at the CC position;

[0030] Figure 6 yes Figure 1 Cross-sectional view of the rotating structure at point DD (lifting diagram);

[0031] Figure 7 yes Figure 1 A schematic diagram of the sectional rotational structure at the middle FF point;

[0032] Figure 8 Here are schematic diagrams of the support ring structure of the present invention: (a) sectional view, (b) top view;

[0033] Figure 9 Here are schematic diagrams of the third support structure of the present invention: (a) sectional view, (b) top view;

[0034] Figure 10 Here are schematic diagrams of the upper clamping plate structure of the present invention: (a) sectional view, (b) top view;

[0035] Figure 11 Here are schematic diagrams of the lower clamping plate structure of the present invention: (a) sectional view, (b) top view;

[0036] Figure 12 Here are schematic diagrams of the long pressure plate structure of the present invention: (a) front view, (b) top view;

[0037] Figure 13 This is a schematic diagram of the connecting plate clamping of the present invention.

[0038] Figures 1 to 12 In the middle, 1. Body; 2. Support ring; 3. First support; 4. Second support; 5. First pressure plate; 6. Ring part; 7. Second pressure plate; 8. First bolt; 9. Third support; 10. Lower clamping plate; 11. Upper clamping plate; 14. Long pressure plate; 18. Lifting ring; 20. Connecting plate; 22. Tenon gap. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings:

[0040] Please see Figures 1 to 13 A processing device for an outer ring and blade assembly includes a body 1, a pressure plate, a support ring 2, a third support 9, and an annular component 6. The body 1 is an annular base. The support ring 2 is fixed to the body 1 by several third supports 9. Several threaded holes are radially arranged on the support ring 2, and a blade is fixed to each threaded hole by a screw. The annular component 6 presses on the entire ring of blades. A pressure plate is provided on the annular component 6 for axially pressing the blades.

[0041] The outer ring is fixed by the stop of the main body 1 and the pressure plate installed on the main body; the blades are radially positioned by fixing the tenons of each blade with screws on the support ring 2; the blades are axially pressed by the annular part 6, and the annular part is pressed by the inner and outer ring pressure plates, which indirectly achieves the axial pressing of the entire blade assembly; the support ring 2 is fixed to the assembly by the upper clamping plate 11 and the lower clamping plate 10, and the assembly is separated from the main body by using a detachable support ring and lifting the support ring 2. The connecting plate enables the limited turnover and transportation of the entire blade assembly after machining.

[0042] The main body 1 consists of a cast ring base with reinforcing ribs for support.

[0043] The support ring 2 is fixed to the body 1 by the third support 9. The support ring 2 has radially designed threaded holes, the position and number of which are consistent with the blade.

[0044] The first support 3 is fixed on the body 1. The first support 3 is used to fix and support the corresponding second pressure plate 7. The second pressure plate 7 is used to press the outer end face of the outer ring.

[0045] Meanwhile, a second support 4 is designed on the main body to fix and support the corresponding first pressure plate 5.

[0046] The first pressure plate 5 is used to press the annular part 6 from the outer circle. The annular part 6 presses on the entire circle of blades to axially press the blades.

[0047] The long pressure plate 14 is designed in two sets to press the annular part 6 from the inner circle, thereby indirectly pressing the blade.

[0048] The upper clamping plate 11 and the lower clamping plate 10 are used when disassembling components from the device; the upper and lower clamping plates fix the blade end to the support ring 2 with bolts to prevent the blade from loosening during lifting.

[0049] The lifting ring 18 is installed on the support ring 2. When it is necessary to disassemble the assembly of the outer ring and the blade from the tooling, the first bolt 8 that fixes the support ring 2 is removed, thereby lifting the assembly.

[0050] How to use the device

[0051] 1. Place the lower outer diameter of the outer ring to be processed into the fixture stop of the fixture body 1;

[0052] 2. Tighten the screws at the blade ends one by one, ensuring that the ends are pressed against the end of the assembled blade.

[0053] 3. The annular part 6 presses the blade. The first pressure plate 5 presses the end face of the annular part 6 from the outer circle and tightens the nut to indirectly press the blade.

[0054] 4. After the inner shape of the workpiece is machined, remove the first pressure plate 5 of the outer ring and replace it with the long pressure plate 14 of the inner ring; use the two long pressure plates 14 to press the end face of the annular part 6 to indirectly press the blade.

[0055] 5. (As shown in Figure 6) After the workpiece is processed, use screws to fix the upper clamping plate 10, the lower clamping plate 11 and the blade end.

[0056] 6. Remove the first bolt 8 that secures the third support 9.

[0057] 7. Using the lifting ring 19, the support ring 2 for fixing the blade, the third support 9, the upper clamping plate 10, and the lower clamping plate 11 are disassembled from the device base 1.

[0058] 8. Loosen the screws at the blade end and disassemble the assembly.

[0059] 9. Assembly process plate: After the parts are machined, select 8-16 mounting bolts 21 evenly around the circumference to fix the blades to the connecting plate 20. The process connecting plate is transferred to the subsequent processes with the assembly until it is put into the warehouse with the workpiece.

[0060] Combined processing methods

[0061] 1. Clamping the outer ring: Place the lower outer diameter stop of the outer ring to be processed into the fixture stop of the device body 1;

[0062] 2. Assemble the blades: Install each blade into the outer ring tenon groove in sequence, ensuring that the relevant assembly requirements are met, and the end face of each blade should fit against the positioning surface of the device body 1.

[0063] 3. Pressing: Use the second pressure plate 7 to press the outer ring end face.

[0064] 4. Apply copper sheet: Evenly insert 0.05-0.30mm thick copper sheet into the tenon of each pair of blades.

[0065] 5. Tightening: First, gently press the entire circle of screws against the corresponding tenons of each leaf, and then tighten all the screws in sequence.

[0066] 6. Pouring the paraffin mixture:

[0067] a. The paraffin mixture consists of 60%–70% paraffin, 20%–30% rosin, 8%–10% cellulose, and a small amount of talc.

[0068] b. Lubricate the workpiece and equipment with machine oil before pouring.

[0069] c. Heat the paraffin mixture to 70°C–80°C. Do not stir manually during heating. Once the mixture has melted into a liquid state, turn off the heating equipment and quickly pour the paraffin mixture between the blades. d. Wear protective gloves and use dedicated pouring tools during pouring. The melting and pouring of the paraffin should be carried out in a designated area.

[0070] e. The pouring height should be flush with the blade and not less than 4mm from the outer ring end face.

[0071] 7. Press the blade: Press the annular part 6 onto the blade that is filled with paraffin mixture, and press the end face of the annular part 6 tightly with the outer ring first pressure plate 5.

[0072] 8. Machining the inner shape of the blade: Align the outer circle of the outer ring within 0.02mm and the end face within 0.03mm, and then machine the inner shape.

[0073] 9. Reverse pressure plate: Remove the first pressure plate 5 of the outer ring and replace it with the long pressure plate 14 of the inner ring; use the two long pressure plates to press the end face of the annular part 6.

[0074] 10. Outer ring road.

[0075] 11. Disassembly and hoisting:

[0076] a. Mark the corresponding sequence numbers on the upper end face of the outer ring and the tenon end face of the blade on the same side to indicate the relative positions between the groove on the outer ring and the blade;

[0077] b. Disassemble the outer ring and blade assembly from the main body 1 (see steps 5, 6, 7, and 8 of the usage method of this device for details).

[0078] 12. Dewaxing and cleaning: Use a wooden mallet and aluminum rod to knock off the paraffin wax mixture from the processed workpiece and clean the parts.

[0079] 13. Install the connecting plate:

[0080] a. Reassemble the blades according to the marked positions in step 11, ensuring that the end faces of each blade are on the same plane with a deviation of no more than 0.1 mm.

[0081] b. Fix the blade to the connecting plate as shown in Figure 1 (see step 9 of the usage method of this device for details);

[0082] 14. The process connecting plate is transferred to subsequent processes along with the workpiece until it is put into storage. It can be removed when the next-level component is assembled and used. The process connecting plate solves the problem of blades easily falling off the outer ring during the transfer, transportation, finished product inspection, and storage of machined assemblies, causing blade damage and disordered assembly sequence. It also facilitates the hoisting and transportation of workpieces.

Claims

1. A method of using a processing device for a combination of outer ring and blade, characterized in that, Based on the outer ring and blade combination processing device, the device includes: The body (1), pressure plate, support ring (2), third support (9) and annular part (6); the body (1) is an annular base, the support ring (2) is fixed to the body (1) by several third supports (9), and several threaded holes are radially arranged on the support ring (2), and each threaded hole is fixed with a blade by a screw; the annular part (6) presses on the entire ring of blades, and a pressure plate is provided on the annular part (6) for axially pressing the blades; The pressure plate includes a first pressure plate (5), a second pressure plate (7), and a long pressure plate (14); the first pressure plate (5) is disposed on the outer circle side of the annular part (6) and is used to press the outer circle of the annular part (6); the long pressure plate (14) is disposed on the inner circle side of the annular part (6) and is used to press the inner circle side of the annular part (6); the second pressure plate (7) is disposed on the outer end face of the outer ring of the blade and is used to press the outer ring of the blade. The main body (1) is provided with a first support (3), and a second pressure plate (7) is fixed on the first support (3) by bolts, and the edge of the second pressure plate (7) presses on the outer end face of the outer ring of the blade; The main body (1) is provided with a second support (4), and the first pressure plate (5) is fixed on the second support (4) by bolts, and the edge of the first pressure plate (5) presses against the outer circle side of the annular part (6); The third support (9) is an L-shaped support; the third support (9) and the support ring (2) are fixed by the first bolt (8); The upper clamping plate (11) and the lower clamping plate (10) are fixed to the connection between the blade tip and the support ring (2) by bolts. The method includes the following steps: Place the lower outer diameter of the outer ring to be processed in the fixture stop of the body (1); The blade tip is installed at the threaded hole of the support ring (2); The annular part (6) presses the blade, and the first pressure plate (5) presses the end face of the annular part (6) from the outer circle; After the inner shape of the workpiece is processed, the first pressure plate (5) of the outer ring is removed and replaced with two long pressure plates (14) of the inner ring to press the end face of the ring part (6); After the workpiece is processed, fix the upper clamping plate (11), the lower clamping plate (10) and the blade end, and remove the first bolt (8) that fixes the third support (9). The support ring (2) for fixing the blade, the third support (9), the upper clamping plate (11), and the lower clamping plate (10) are disassembled from the main body (1) of the device by using the lifting ring; Loosen the blade fixing screws on the support ring (2) and disassemble the assembly.

2. The method of using the outer ring and blade combination processing device according to claim 1, characterized in that, The long pressure plate (14) is fixed to the body (1) by bolts, and the end of the long pressure plate (14) presses against the inner circle side of the annular part (6).

3. The method of using the outer ring and blade combination processing device according to claim 1, characterized in that, Several lifting rings (18) are provided on the support ring (2).

4. The method of using the outer ring and blade combination processing device according to claim 1, characterized in that, Both the upper clamping plate (11) and the lower clamping plate (10) are curved plates.

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