A heavy-duty turbine seal near-net-shape post-processing device

Abstract

The application discloses a kind of heavy-duty steam turbine seal near net shape forming post-processing device, belong to steam turbine seal processing technical field, including frame and hydraulic cylinder, hydraulic cylinder is fixedly connected in the middle of frame upper end, the output end of hydraulic cylinder is slidably through frame setting, the inner wall of frame is fixedly connected with support plate, support plate upper end middle place is placed with expansion die, the output end of hydraulic cylinder is fixedly connected with mounting plate, mounting plate lower end is fixedly connected with expansion head, expansion head is directly opposite expansion die, and pressing assembly is installed on the upper end of support plate;The application is by pressing assembly to seal piece to exert downward pressure to make it adhere to expansion die, avoid axial movement to improve forming accuracy, simultaneously by clamping assembly to realize mould quick dismounting to shorten replacement time, and by limiting component when pressure ring drops automatically unlock mounting plate, after reset automatically lock, prevent misoperation trigger hydraulic cylinder drop, significantly improve equipment safety and operation reliability.

Description

Technical Field

[0001] This invention relates to the field of turbine seal processing technology, and more specifically, to a post-processing device for near-net-shape forming of heavy-duty turbine seals. Background Technology

[0002] Heavy-duty steam turbine seals are key components installed between the moving and stationary blades of each stage of the steam turbine to reduce interstage leakage losses and improve thermal efficiency. Due to their long-term operation in high-temperature and high-pressure steam environments, they require high dimensional accuracy and good roundness. Even after near-net-shape forming, the seals still have defects in dimensional deviation and roundness due to uneven metal flow and differences in cooling shrinkage during the high-temperature forming process. Therefore, they need to be sizing and shaping by a post-processing device. The near-net-shape forming post-processing device applies radial expansion force to the seal through a sizing mold, so that its inner wall fits the working surface of the sizing mold, thereby accurately correcting the diameter and roundness and improving the distribution of residual stress, ultimately obtaining a seal that meets the design requirements.

[0003] In existing near-net-shape forming post-processing equipment for seals, the seals are placed directly on the bulging mold. There is a lack of a reliable pre-tightening mechanism to axially position the seals. During the bulging process, when the bulging head presses down to drive the mold to expand radially, the seals are subjected to huge radial expansion forces. Due to the lack of sufficient axial restraint, the seals are prone to axial movement and warping, resulting in gaps between the end face of the seal and the upper end face of the mold. It is difficult to effectively guarantee the height and end face flatness of the seals after bulging. Furthermore, most of the bulging molds in the existing equipment are fixed to the support platform by bolt locking. During installation, tools are needed to tighten each bolt one by one, and during disassembly, they need to be loosened one by one. The operation is cumbersome and time-consuming. When it is necessary to change molds of different specifications to adapt to seals of different sizes, the mold replacement efficiency is extremely low, which restricts the processing flexibility and production efficiency of the equipment.

[0004] Therefore, we have made improvements to this by proposing a near-net-shape post-processing device for heavy-duty steam turbine seals. Summary of the Invention

[0005] In view of the above-mentioned problems in the existing technology, the purpose of the present invention is to provide a post-processing device for near-net-shape forming of heavy-duty steam turbine seals.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: a near-net-shape forming post-processing device for heavy-duty steam turbine seals, comprising a frame and a hydraulic cylinder, wherein the hydraulic cylinder is fixedly connected to the middle of the upper end of the frame, the output end of the hydraulic cylinder is slidably connected through the frame, a support plate is fixedly connected to the inner wall of the frame, a forming mold is placed at the middle of the upper end of the support plate, an mounting plate is fixedly connected to the output end of the hydraulic cylinder, a forming head is fixedly connected to the lower end of the mounting plate, the forming head faces the forming mold, a pressing component is installed on the upper end of the support plate, and a clamping component is installed on the support plate.

[0007] Preferably, the pressing assembly includes two upright plates fixedly connected to the upper surface of the support plate. The two upright plates are symmetrically arranged on both sides of the bulging mold. Each of the two upright plates has a lifting groove on the side closer to the bulging mold. Lifting rods are slidably connected in the two lifting grooves. A pressure ring is fixedly connected between the two lifting rods. Limiting components are installed at the upper ends of the two lifting rods. The two limiting components are symmetrically arranged on both sides of the mounting plate.

[0008] Preferably, one of the lifting slots has a one-way screw rotatably connected to its inner wall, and the other lifting slot has a guide rod fixedly connected to its inner wall. One of the lifting rods is threaded onto the outside of the one-way screw, and the other lifting rod is slidably fitted onto the outside of the guide rod. A motor is fixedly connected to the upper end of the upright plate with the one-way screw, and the output end of the motor rotatably passes through the upright plate and is fixedly connected to the upper end of the one-way screw.

[0009] Preferably, the limiting component includes a rack fixedly connected to the upper end of the lifting rod, and two symmetrically arranged fixing plates fixedly connected to the upper part of the inner wall of the frame. The inner walls of the two fixing plates are rotatably connected to spur gears, and the rack and spur gears mesh with each other. Each of the two fixing plates has a moving groove on the side near the mounting plate.

[0010] Preferably, each of the two movable slots is slidably connected to a movable rod, and the two movable rods are fixedly connected to a common insertion rod. The lower end of the insertion rod is fixedly connected to a rack two, which meshes with a spur gear. The rack one and rack two are staggered. The side wall of the mounting plate has a slot, and the insertion rod and the slot are engaged.

[0011] Preferably, the clamping assembly includes a sliding cavity formed in the middle of the support plate. The top inner wall of the sliding cavity has two symmetrically arranged sliding openings. The inner wall of the sliding cavity is slidably connected to two symmetrically arranged movable frames. The two movable frames are slidably connected to the two sliding openings respectively. The upper end of each of the two movable frames is fixedly connected to a limiting block. The side wall of the bulging mold has two symmetrically arranged limiting grooves. The two limiting blocks are respectively engaged with the two limiting grooves.

[0012] Preferably, a bidirectional screw is rotatably connected to the inner wall of the sliding cavity, and both movable frames are threaded onto the outside of the bidirectional screw. A worm gear is fixedly sleeved at the middle of the outside of the bidirectional screw. A worm is rotatably connected to the inner wall of the sliding cavity, and the worm and the worm gear mesh with each other. A handle is rotatably connected to the side wall of the support plate, and the output end of the handle rotatably passes through the support plate and is fixedly connected to one end of the worm.

[0013] Preferably, a bidirectional screw is rotatably connected to the inner wall of the sliding cavity, and both movable frames are threaded onto the outside of the bidirectional screw. A worm gear is fixedly sleeved at the middle of the outside of the bidirectional screw. A worm is rotatably connected to the inner wall of the sliding cavity, and the worm and the worm gear mesh with each other. A handle is rotatably connected to the side wall of the support plate, and the output end of the handle rotatably passes through the support plate and is fixedly connected to one end of the worm.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The pressing component of this invention uses a motor to drive a one-way screw to rotate, which drives the lifting rod to descend smoothly along the lifting groove. This drives the pressure ring to apply downward pressure to the seal, so that the lower end face of the seal fits tightly against the upper end face of the expansion mold. This ensures that the seal maintains the correct axial position during the expansion process, avoids axial movement and warping of the ring caused by radial expansion force, and effectively improves the dimensional accuracy and end face flatness of the seal after expansion.

[0016] 2. The clamping assembly drives the worm gear to rotate by rotating the handle, which in turn drives the two moving frames to slide synchronously along the sliding opening in opposite directions. This causes the limiting block to insert into and disengage from the limiting groove on the side wall of the bulging mold, enabling the bulging mold to be clamped and released quickly. The mold can be installed and disassembled without the need for any tools, which significantly shortens the mold change time and improves the applicability and ease of operation of the equipment.

[0017] 3. During the descent of the pressure ring, the limiting component drives the rack and pinion to rotate via the lifting rod, which in turn drives the rack and pinion and the insert rod to slide horizontally along the moving groove. This allows the insert rod to be automatically pulled out of the slot on the side wall of the mounting plate, thereby releasing the limitation on the mounting plate and allowing the hydraulic cylinder to drive the forming head to descend for processing. When the forming is completed, the forming head rises and resets, and the pressure ring rises, causing the insert rod to slide in the opposite direction and re-insert into the slot, thus achieving automatic locking of the mounting plate. This effectively prevents the operator from accidentally triggering the hydraulic cylinder to descend when not in operation, eliminating equipment damage and personal injury caused by the unexpected descent of the forming head, and significantly improving the safety and operational reliability of the equipment. Attached Figure Description

[0018] Figure 1 A schematic diagram of the main structure of a near-net-shape forming post-processing device for heavy-duty steam turbine seals provided in this application;

[0019] Figure 2 Another perspective schematic diagram of the main structure of a near-net-shape post-processing device for heavy-duty steam turbine seals provided in this application;

[0020] Figure 3 A schematic diagram of the pressing assembly structure of a near-net-shape post-processing device for heavy-duty steam turbine seals provided in this application;

[0021] Figure 4 A schematic diagram of the sliding cavity and handle structure of a near-net-shape post-processing device for heavy-duty steam turbine seals provided in this application;

[0022] Figure 5 A schematic diagram of the clamping assembly structure of a near-net-shape post-processing device for heavy-duty steam turbine seals provided in this application;

[0023] Figure 6 A schematic diagram of the main structure of the limiting component of a near-net-shape post-processing device for heavy-duty steam turbine seals provided in this application;

[0024] Figure 7 This application provides a schematic diagram of rack one and rack two structures for a near-net-shape post-processing device for heavy-duty steam turbine seals.

[0025] In the diagram: 1. Frame; 2. Hydraulic cylinder; 3. Support plate; 4. Bulging mold; 5. Mounting plate; 6. Bulging head; 7. Pressing assembly; 701. Vertical plate; 702. Lifting groove; 703. Lifting rod; 704. Pressure ring; 705. One-way screw; 706. Guide rod; 707. Motor; 8. Clamping assembly; 801. Sliding cavity; 802. Sliding opening; 803. Moving frame; 804. Limiting block; 805. 806. Limiting groove; 807. Double-acting screw; 808. Worm gear; 809. Worm; 9000. Handle; 901. Limiting assembly; 902. Rack 1; 903. Fixing plate; 904. Spur gear; 905. Moving groove; 906. Moving rod; 907. Insert rod; 908. Rack 2; 909. Slot; 10. Fixing rod; 11. Through hole; 12. Infrared receiver; 13. Infrared transmitter; 14. Warning light. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0027] Please see Figures 1-7 As shown, the present invention provides a technical solution: a near-net-shape forming post-processing device for heavy-duty steam turbine seals, including a frame 1 and a hydraulic cylinder 2. The hydraulic cylinder 2 is fixedly connected to the middle of the upper end of the frame 1. The output end of the hydraulic cylinder 2 slides through the frame 1. A support plate 3 is fixedly connected to the inner wall of the frame 1. A forming mold 4 is placed at the middle of the upper end of the support plate 3. An installation plate 5 is fixedly connected to the output end of the hydraulic cylinder 2. A forming head 6 is fixedly connected to the lower end of the installation plate 5. The forming head 6 faces the forming mold 4. A pressing component 7 is installed on the upper end of the support plate 3. A clamping component 8 is installed on the support plate 3.

[0028] Furthermore, the frame 1 serves as the supporting skeleton of the entire device, providing a stable mounting base for the hydraulic cylinder 2, support plate 3, and various components. The hydraulic cylinder 2 is fixed at the middle of the upper end of the frame 1, and its output end slides through the frame 1, providing a controllable linear driving force for the lifting and lowering movement of the forming head 6. This ensures that the forming head 6 can press downward into the forming mold 4 according to a predetermined stroke to complete the forming process. The support plate 3 is fixedly connected to the inner wall of the frame 1, providing a flat and stable bearing platform for the forming mold 4, pressing component 7, and clamping component 8, ensuring the positional accuracy and stress stability of each component during operation. The forming mold 4 is placed at the middle of the upper end of the support plate 3 to accommodate the seal to be processed and to provide the forming cavity required for the forming of the seal, ensuring that the seal obtains a precise cross-sectional profile during radial expansion. The mounting plate 5 is fixedly connected to the output end of the hydraulic cylinder 2, uniformly transmitting the driving force of the hydraulic cylinder 2 to the forming head 6. A stable connection interface is provided for the forming head 6 to ensure its verticality and smooth movement during lifting. The forming head 6 is fixedly connected to the lower end of the mounting plate 5 and faces the forming mold 4. Driven by the hydraulic cylinder 2, it extends downward into the forming mold 4. Through the conical surface cooperation, it pushes the segmented module in the forming mold 4 to expand radially outward, thereby expanding the seal to the target size. The pressing component 7 is installed on the upper end of the support plate 3 and applies a downward pressing force to the seal before forming, so that the lower end face of the seal fits tightly against the upper end face of the forming mold 4, preventing the seal from axial movement and warping due to radial expansion force during forming, and ensuring the dimensional accuracy and end face flatness of the seal after forming. The clamping component 8 is installed on the support plate 3 for quick clamping and releasing of the forming mold 4, realizing the quick installation and disassembly of the forming mold 4 on the support plate 3. The mold can be replaced without tools, improving the applicability and ease of operation of the equipment.

[0029] The bulging mold 4 is an existing technology, adopting a segmented structure, mainly composed of segmented punches and conical core blocks. Multiple segmented punches are distributed in a ring and fitted outside the conical core block. The outer wall of the conical core block and the inner wall of the segmented punches form a sliding fit. The hydraulic cylinder 2 drives the bulging head 6 to press down the conical core block. When the conical core block moves downward, the vertical driving force is converted into a horizontal radial thrust through the conical surface, pushing each segmented punch to expand outward synchronously along the sliding groove on the base. This opens the seal that is fitted outside the segmented punches from the inside, so that the inner wall of the seal fits with the outer wall of the segmented punches, realizing radial bulging. After the bulging is completed, the conical core block rises and resets. The segmented punches automatically retract by the elastic force of the reset spring, making it easy to remove the processed seal. Further details are omitted here.

[0030] In the preferred embodiment of this technical solution, please refer to Figures 1-3 As shown, the pressing component 7 includes two upright plates 701 fixedly connected to the upper surface of the support plate 3. The two upright plates 701 are symmetrically arranged on both sides of the bulging mold 4. Each of the two upright plates 701 has a lifting groove 702 on the side closest to the bulging mold 4. Lifting rods 703 are slidably connected in the two lifting grooves 702 respectively. A pressure ring 704 is fixedly connected between the two lifting rods 703. Limiting components 9 are installed on the upper end of each of the two lifting rods 703. The two limiting components 9 are symmetrically arranged on both sides of the mounting plate 5.

[0031] One of the lifting slots 702 has a one-way screw 705 rotatably connected to its inner wall, and another lifting slot 702 has a guide rod 706 fixedly connected to its inner wall. One of the lifting rods 703 is threaded onto the outside of the one-way screw 705, and the other lifting rod 703 is slidably sleeved onto the outside of the guide rod 706. A motor 707 is fixedly connected to the upper end of the vertical plate 701 on which the one-way screw 705 is provided. The output end of the motor 707 rotates through the vertical plate 701 and is fixedly connected to the upper end of the one-way screw 705.

[0032] Furthermore, the upright plate 701 is fixedly connected to the upper end face of the support plate 3 and symmetrically arranged on both sides of the bulging mold 4, providing a vertical mounting base for the lifting rod 703 and the motor 707, ensuring the guiding accuracy and structural stability of the pressure ring 704 during the lifting process. The lifting groove 702 is opened on the side of the upright plate 701 near the bulging mold 4, providing a vertical sliding track for the lifting rod 703, constraining the movement direction of the lifting rod 703 to ensure that the pressure ring 704 rises and falls in a straight line. The lifting rod 703 is slidably connected in the lifting groove 702. When it slides up and down along the lifting groove 702, it drives the pressure ring 704 to rise and fall synchronously, converting the rotational motion into linear motion to drive the pressure ring 704 to press and release the seal. The pressure ring 704 is fixedly connected between the two lifting rods 703. When it falls synchronously with the lifting rods 703, it applies a uniform annular downward pressure to the seal, causing the lower end of the seal to... The seal is tightly fitted to the upper surface of the forming mold 4 to ensure that the seal does not move axially during the forming process. The one-way screw 705 is rotatably connected to the inner wall of the lifting groove 702. When it rotates under the drive of the motor 707, it drives the lifting rod 703 to rise and fall along the lifting groove 702 through the threaded engagement, so as to achieve precise control of the pressing position of the pressure ring 704. The guide rod 706 is fixedly connected to the inner wall of the lifting groove 702. It cooperates with the one-way screw 705 to provide vertical guidance for the lifting rod 703 on the other side, so as to ensure that the lifting rods 703 on both sides rise and fall synchronously to ensure that the pressure ring 704 is evenly stressed at both ends and does not tilt during the pressing process. The motor 707 is fixedly connected to the upper end of the vertical plate 701 and the output end passes through the vertical plate 701 and is fixedly connected to the upper end of the one-way screw 705, so as to provide rotational driving force for the one-way screw 705 to precisely control the lifting stroke and pressing force of the pressure ring 704.

[0033] In the preferred embodiment of this technical solution, please refer to Figure 1 , Figure 6 and Figure 7 As shown, the limiting component 9 includes a rack 901 fixedly connected to the upper end of the lifting rod 703. Two symmetrically arranged fixing plates 902 are fixedly connected to the upper part of the inner wall of the frame 1. A spur gear 903 is rotatably connected to the inner wall of the two fixing plates 902. The rack 901 and the spur gear 903 mesh with each other. A moving groove 904 is provided on the side of the two fixing plates 902 near the mounting plate 5.

[0034] Two movable slots 904 are slidably connected to movable rods 905 respectively. A plug rod 906 is fixedly connected between the two movable rods 905. A rack 907 is fixedly connected to the lower end of the plug rod 906. The rack 907 and the spur gear 903 mesh with each other. The rack 901 and the rack 907 are staggered. A slot 908 is opened on the side wall of the mounting plate 5. The plug rod 906 and the slot 908 are engaged.

[0035] Furthermore, rack 901 is fixedly connected to the upper end of lifting rod 703. As lifting rod 703 rises and falls, it drives spur gear 903 to rotate via linear motion, converting the vertical motion of lifting rod 703 into the rotational motion of spur gear 903 to achieve a change in power direction. Fixed plates 902 are fixedly connected to the upper part of the inner wall of frame 1, with two plates symmetrically arranged, providing rotational support for spur gear 903 and ensuring the positional accuracy and operational stability of spur gear 903 during rotation. Spur gear 903 is rotatably connected to the inner walls of the two fixed plates 902 and meshes with rack 901 and rack 907. During rotation, it converts the vertical motion of rack 901 into... The rotational motion of the gear 903 drives the rack 907 to reciprocate horizontally, thus changing the direction of motion. A sliding groove 904 is located on the side of the fixed plate 902 near the mounting plate 5, providing a horizontal sliding track for the moving rod 905 and constraining its direction of movement to ensure the insertion rod 906 moves horizontally in a straight line. The moving rod 905 is slidably connected within the sliding groove 904. When it slides horizontally along the groove 904, it drives the insertion rod 906 to move synchronously, converting the rotational motion of the spur gear 903 into linear motion to drive the insertion rod 906 to insert into and disengage from the slot 908. The insertion rod 906 is fixedly connected between the two moving rods 905, moving horizontally with the moving rod 905. During horizontal movement, the inserter inserts into and disengages from the slot 908 on the side wall of the mounting plate 5, locking and unlocking the mounting plate 5 to ensure that the forming head 6 can only descend for processing after the pressure ring 704 is pressed into place, preventing operator error from triggering the hydraulic cylinder 2 to descend. The second rack 907 is fixedly connected to the lower end of the insert rod 906 and meshes with the spur gear 903, offset from the first rack 901. It receives the rotational driving force of the spur gear 903 and converts it into horizontal reciprocating motion, driving the insert rod 906 to automatically switch between locking and unlocking actions. The slot 908 is located on the side wall of the mounting plate 5 and engages with the insert rod 906, accommodating the insertion of the insert rod 906 to limit the movement of the mounting plate 5. If the hydraulic cylinder 2 malfunctions, the thrust of the mounting plate 5 pressing down is transmitted to the moving rods 905 on both sides via the insertion rod 906. Then, the load is distributed to the fixed plate 902 and the frame 1 through the contact surface between the moving rod 905 and the moving groove 904 on the fixed plate 902, forming a complete force closed loop. The spur gear 903, rack 1 901 and rack 2 907 are only used to drive the insertion rod 906 to be inserted and removed horizontally and do not participate in any load bearing. The contact surface of the moving rod 905, insertion rod 906 and moving groove 904 is designed according to the shear resistance condition, and its strength is sufficient to cope with the impact of malfunction. The safety interlock logic is reliable and prevents the expansion head 6 from accidentally descending in the non-working state, causing equipment damage and personnel injury.

[0036] In the preferred embodiment of this technical solution, please refer to Figure 4 and Figure 5As shown, the clamping assembly 8 includes a sliding cavity 801 located in the middle of the support plate 3. The top inner wall of the sliding cavity 801 has two symmetrically arranged sliding openings 802. The inner wall of the sliding cavity 801 is slidably connected to two symmetrically arranged movable frames 803. The two movable frames 803 are slidably connected to the two sliding openings 802 respectively. The upper ends of the two movable frames 803 are fixedly connected to limit blocks 804. The side wall of the bulging mold 4 has two symmetrically arranged limit grooves 805. The two limit blocks 804 are respectively engaged with the two limit grooves 805.

[0037] A bidirectional screw 806 is rotatably connected to the inner wall of the sliding cavity 801. Two movable frames 803 are threaded onto the outside of the bidirectional screw 806. A worm gear 807 is fixedly fitted at the middle of the outside of the bidirectional screw 806. A worm 808 is rotatably connected to the inner wall of the sliding cavity 801. The worm 808 and the worm gear 807 mesh with each other. A handle 809 is rotatably connected to the side wall of the support plate 3. The output end of the handle 809 rotatably passes through the support plate 3 and is fixedly connected to one end of the worm 808.

[0038] Furthermore, the sliding cavity 801 is located in the middle of the support plate 3, providing installation space for the movable frame 803, the bidirectional screw 806, the worm gear 807, and the worm 808, and accommodating the movement of each component inside. The sliding opening 802 is located on the top inner wall of the sliding cavity 801, with two symmetrically arranged openings. It provides a passage for the movable frame 803 and guides and limits its horizontal sliding, constraining the movable frame 803 to move in a straight line to ensure that the limiting block 804 accurately inserts into the limiting groove 805. The bidirectional screw 806 is rotatably connected to the inner wall of the sliding cavity 801, and both movable frames 803 are threaded onto its exterior. During rotation, the two moving frames 803 are driven by opposite threads on both sides to slide synchronously in opposite directions, thereby clamping and releasing the bulging mold 4. The worm gear 807 meshes with the worm 808 to receive the rotational driving force and drive the bidirectional screw 806 to rotate. The self-locking characteristics of the worm gear 807 and the worm 808 keep the bidirectional screw 806 locked in the clamped state and prevent it from loosening. The handle 809 is rotatably connected to the side wall of the support plate 3 and its output end passes through the support plate 3 and is fixedly connected to one end of the worm 808, allowing the operator to manually rotate it to drive the entire clamping assembly 8 to move. The bulging mold 4 can be quickly installed and disassembled without tools.

[0039] In the preferred embodiment of this technical solution, please refer to Figure 1 , Figure 3 and Figure 4 As shown, a fixed rod 10 is fixedly connected to the lower end of one of the lifting rods 703, a through hole 11 is opened at the upper end of the support plate 3, the fixed rod 10 is directly opposite the through hole 11, an infrared receiver 12 is installed on the side wall of the fixed rod 10, an infrared transmitter 13 is fixedly connected to the inner wall of the through hole 11, and a warning light 14 is fixedly connected to the side wall of the frame 1.

[0040] Furthermore, the fixed rod 10 is fixedly connected to the lower end of the lifting rod 703 and rises and falls synchronously with the lifting rod 703. It provides a mounting carrier for the infrared receiver 12 and drives the infrared receiver 12 to move up and down, allowing it to approach and move away from the infrared transmitter 13 during the lifting process to achieve signal switching. The through hole 11 is opened at the upper end of the support plate 3 and faces the fixed rod 10, providing a mounting position for the infrared transmitter 13 and providing a space for the infrared receiver 12 to descend with the fixed rod 10. This allows the infrared receiver 12 to descend to a position directly opposite the infrared transmitter 13 to receive signals. The infrared receiver 12 is mounted on the side wall of the fixed rod 10 and descends with the fixed rod 10 to a position directly opposite the infrared transmitter 13. When facing the machine, it receives infrared signals. When the pressure ring 704 is pressed down to the correct position, it sends a position signal to the control system to allow the hydraulic cylinder 2 to drive the forming head 6 to descend for processing. The infrared transmitter 13 is fixedly connected to the inner wall of the through hole 11 and continuously emits infrared beams outward. It works with the infrared receiver 12 to form a through-beam detection circuit. When the pressure ring 704 is pressed down and the infrared receiver 12 receives the infrared signal, it outputs a position signal to trigger the next forming action. The warning light 14 is fixedly connected to the side wall of the frame 1. When the infrared receiver 12 receives the signal, it emits an audible and visual prompt to remind the operator that the pressure ring 704 has been pressed down to the correct position. At the same time, it issues a warning when the equipment is abnormal to remind the operator to handle the situation in time to ensure safety.

[0041] Working principle: The operator places the forming mold 4 at the predetermined position on the upper end of the support plate 3, so that the two limiting grooves 805 on the forming mold 4 are aligned with the two limiting blocks 804 respectively. Then the operator rotates the handle 809, which drives the worm 808 to rotate. The worm 808 drives the worm wheel 807 to rotate. The worm wheel 807 drives the bidirectional screw 806 to rotate in the sliding cavity 801. The bidirectional screw 806 drives the two moving frames 803 to slide towards each other along the sliding opening 802, which drives the two limiting blocks 804 to insert into the two limiting grooves 805 respectively, clamping and fixing the forming mold 4 on the support plate 3. The self-locking characteristics of the worm 808 and the worm wheel 807 ensure that the clamping state will not loosen during the forming process.

[0042] The sealing element to be processed is then placed on the outside of the bulging mold 4. The motor 707 drives the one-way screw 705 to rotate. The one-way screw 705 drives the lifting rod 703 to slide down along the lifting groove 702. The lifting rod 703 drives the pressure ring 704 to descend synchronously. Under the guidance of the guide rod 706, the two lifting rods 703 maintain synchronous movement. The pressure ring 704 descends smoothly until it presses against the upper end face of the sealing element, tightly fitting the lower end face of the sealing element against the upper end face of the bulging mold 4.

[0043] As the pressure ring 704 descends, the lifting rod 703 drives the rack 901 to descend synchronously. The rack 901 drives the spur gear 903 to rotate between the two fixed plates 902. The spur gear 903 then drives the rack 907 to move horizontally. The rack 907 drives the moving rod 905 to slide along the moving groove 904. The moving rod 905 drives the insertion rod 906 to be pulled out from the slot 908 on the side wall of the mounting plate 5, thereby releasing the restriction on the mounting plate 5. At this time, the extension and retraction of the hydraulic cylinder 2 is no longer restricted.

[0044] After the limit is released, the mounting plate 5 is in a free state. The output end of the hydraulic cylinder 2 pushes the mounting plate 5 to move downward. The mounting plate 5 drives the bulging head 6 to descend. The bulging head 6 extends into the bulging mold 4 and pushes the bulging mold 4 to expand radially outward, bulging the seal to the target size. During the bulging process, the seal is always kept in the correct axial position under the continuous pressing of the pressure ring 704, and there will be no axial movement or warping.

[0045] After the bulging is completed, the hydraulic cylinder 2 drives the mounting plate 5 and the bulging head 6 to rise and reset. Then the motor 707 reverses, driving the one-way screw 705 to reverse. The lifting rod 703 drives the pressure ring 704 to rise and reset along the lifting groove 702. When the lifting rod 703 rises, it drives the rack 1 901 to move upward synchronously. The rack 1 901 drives the spur gear 903 to reverse. The spur gear 903 drives the rack 2 907 to move horizontally in the opposite direction. Through the moving rod 905, the insertion rod 906 slides back towards the mounting plate 5 and inserts into the slot 908, realizing the automatic locking of the mounting plate 5. At this time, the user can remove the seal.

[0046] When it is necessary to disassemble the bulging mold 4, the operator rotates the handle 809 in the opposite direction, which drives the bidirectional screw 806 to reverse through the worm 808 and worm wheel 807. The two moving frames 803 slide in opposite directions along the sliding port 802, which drives the limit block 804 to be pulled out from the limit groove 805, releasing the clamping on the bulging mold 4, and the bulging mold 4 can be taken out.

[0047] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0048] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A near-net-shape forming post-processing device for heavy-duty steam turbine seals, comprising a frame (1) and a hydraulic cylinder (2), wherein the hydraulic cylinder (2) is fixedly connected to the middle of the upper end of the frame (1), the output end of the hydraulic cylinder (2) is slidably connected through the frame (1), and a support plate (3) is fixedly connected to the inner wall of the frame (1), characterized in that, A forming mold (4) is placed at the middle of the upper end of the support plate (3). A mounting plate (5) is fixedly connected to the output end of the hydraulic cylinder (2). A forming head (6) is fixedly connected to the lower end of the mounting plate (5). The forming head (6) faces the forming mold (4). A pressing component (7) is installed on the upper end of the support plate (3). A clamping component (8) is installed on the support plate (3).

2. The post-processing device for near-net-shape forming of heavy-duty steam turbine seals according to claim 1, characterized in that, The pressing component (7) includes two upright plates (701) fixedly connected to the upper surface of the support plate (3). The two upright plates (701) are symmetrically arranged on both sides of the bulging mold (4). Each of the two upright plates (701) has a lifting groove (702) on the side near the bulging mold (4). Lifting rods (703) are slidably connected in the two lifting grooves (702). A pressure ring (704) is fixedly connected between the two lifting rods (703). Limiting components (9) are installed on the upper ends of the two lifting rods (703). The two limiting components (9) are symmetrically arranged on both sides of the mounting plate (5).

3. The post-processing device for near-net-shape forming of heavy-duty steam turbine seals according to claim 2, characterized in that, One of the lifting grooves (702) has a one-way screw (705) rotatably connected to its inner wall, and another lifting groove (702) has a guide rod (706) fixedly connected to its inner wall. One of the lifting rods (703) is threaded onto the outside of the one-way screw (705), and the other lifting rod (703) is slidably sleeved onto the outside of the guide rod (706). A motor (707) is fixedly connected to the upper end of the upright plate (701) on which the one-way screw (705) is provided. The output end of the motor (707) rotatably passes through the upright plate (701) and is fixedly connected to the upper end of the one-way screw (705).

4. The post-processing device for near-net-shape forming of heavy-duty steam turbine seals according to claim 2, characterized in that, The limiting component (9) includes a rack (901) fixedly connected to the upper end of the lifting rod (703). Two symmetrically arranged fixing plates (902) are fixedly connected to the upper part of the inner wall of the frame (1). A spur gear (903) is rotatably connected to the inner wall of the two fixing plates (902). The rack (901) and the spur gear (903) mesh with each other. A moving groove (904) is opened on the side of the two fixing plates (902) near the mounting plate (5).

5. The post-processing device for near-net-shape forming of heavy-duty steam turbine seals according to claim 4, characterized in that, The two movable slots (904) are slidably connected to movable rods (905), and the two movable rods (905) are fixedly connected to a common insertion rod (906). The lower end of the insertion rod (906) is fixedly connected to a rack two (907). The rack two (907) and the spur gear (903) mesh with each other. The rack one (901) and the rack two (907) are staggered. The side wall of the mounting plate (5) is provided with a slot (908), and the insertion rod (906) and the slot (908) are engaged.

6. The post-processing device for near-net-shape forming of heavy-duty steam turbine seals according to claim 1, characterized in that, The clamping assembly (8) includes a sliding cavity (801) located in the middle of the support plate (3). The top inner wall of the sliding cavity (801) has two symmetrically arranged sliding openings (802). The inner wall of the sliding cavity (801) is slidably connected to two symmetrically arranged movable frames (803). The two movable frames (803) are slidably connected to the two sliding openings (802). The upper ends of the two movable frames (803) are fixedly connected to limit blocks (804). The side wall of the bulging mold (4) has two symmetrically arranged limit grooves (805). The two limit blocks (804) are respectively engaged with the two limit grooves (805).

7. The post-processing device for near-net-shape forming of heavy-duty steam turbine seals according to claim 6, characterized in that, The inner wall of the sliding cavity (801) is rotatably connected to a bidirectional screw (806). Both of the moving frames (803) are threaded onto the outside of the bidirectional screw (806). A worm gear (807) is fixedly sleeved at the middle of the outside of the bidirectional screw (806). The inner wall of the sliding cavity (801) is rotatably connected to a worm (808). The worm (808) and the worm gear (807) mesh with each other. The side wall of the support plate (3) is rotatably connected to a handle (809). The output end of the handle (809) rotatably passes through the support plate (3) and is fixedly connected to one end of the worm (808).

8. The post-processing device for near-net-shape forming of heavy-duty steam turbine seals according to claim 2, characterized in that, One of the lifting rods (703) has a fixed rod (10) fixedly connected to its lower end. The support plate (3) has a through hole (11) at its upper end. The fixed rod (10) is directly opposite the through hole (11). An infrared receiver (12) is installed on the side wall of the fixed rod (10). An infrared transmitter (13) is fixedly connected to the inner wall of the through hole (11). A warning light (14) is fixedly connected to the side wall of the frame (1).

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