AHMA type operating mechanism energy storage piston overhauling method

Abstract

The application discloses a kind of AHMA type operating mechanism energy storage piston's overhauling method, comprising the following steps: S1. by energy storage pull rod, the energy storage piston on high pressure cylinder is ejected, and the energy storage piston is removed;S2. the steel part of energy storage piston is separated from copper part;S3. old seal on steel part and copper part is removed, and steel part and copper part are inspected clean;S4. new sealing ring installation and plastic shape on steel part;S5. new sealing ring installation and plastic shape on copper part;S6. energy storage piston 40 is reassembled to high pressure cylinder.The above-mentioned method can successfully complete AHMA type operating mechanism energy storage piston dismounting and sealing replacement work, and guarantees the overall quality of operating mechanism overhaul.

Description

Technical Field

[0001] This invention relates to the field of maintenance technology for AHMA type hydraulic operating mechanisms, and in particular to a method for overhauling the energy storage piston of an AHMA type operating mechanism. Background Technology

[0002] The high-pressure cylinder energy storage piston of the operating mechanism is a crucial structural component that separates the high and low-pressure cylinders. Its main function is to pump hydraulic oil from the low-pressure cylinder into the high-pressure cylinder via a plunger pump in the pump chamber during the energy storage process. This causes the hydraulic oil in the high-pressure cylinder to expand, and the energy storage piston extends and retracts in response to the change in hydraulic oil volume. The energy storage piston then drives the energy storage rod to compress the disc spring and store elastic potential energy. Simultaneously, the opening and closing piston rod passes through the central hole of the energy storage piston, making it a vital component in the opening and closing operation of the operating mechanism. Therefore, the energy storage piston is a core component of the high-pressure cylinder of the operating mechanism.

[0003] During operation, the pressure difference between the high and low pressure cylinders on both sides of the energy storage piston is approximately 600 bar. The sealing performance of the energy storage piston is a key focus during maintenance. Even a scratch as small as 10 micrometers at the seal can cause internal leakage in the operating mechanism, preventing it from storing energy properly. During the disassembly and overhaul of the operating mechanism, the disassembly and assembly of the energy storage piston, as well as the replacement of the seals on its external and internal cavities, is a crucial part of the overhaul project. The quality of this maintenance directly affects whether the operating mechanism can successfully complete subsequent low-pressure sealing and high-pressure holding tests, and is an important maintenance item for verifying the absence of internal leakage in the operating mechanism. Summary of the Invention

[0004] The main objective of this invention is to provide a maintenance method for the energy storage piston of the AHMA type operating mechanism, which can smoothly complete the maintenance of this important component and ensure the overall quality of the overhaul of the operating mechanism.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a maintenance method for the energy storage piston of an AHMA type operating mechanism, comprising the following steps: S1. Use the energy storage rod to push out the energy storage piston on the high-pressure cylinder and remove the energy storage piston; S2. Separate the steel and copper parts of the energy storage piston; S3. Remove the old seals from the steel and copper parts, and inspect and clean the steel and copper parts; S4. Installation and shaping of the new sealing ring on the steel section; S5. Installation and shaping of the new sealing ring on the copper part; S6. Reinstall the energy storage piston onto the high-pressure cylinder.

[0006] In S1, the process of pushing the energy storage piston out of the high-pressure cylinder via the energy storage rod includes the following steps: S11. After the low-pressure cylinder of the operating mechanism is lifted out, the high-pressure cylinder is installed on the tilting fixture, and the high-pressure cylinder is tilted to the horizontal position by the tilting fixture. S12. Install the bottom flange of the disc spring onto the six energy storage rods and secure it with the first nut. Protect the stroke rod extending from the energy storage piston and the opening and closing transmission rod. The tightening torque of the first nut is 120-140 N•m. S13. Use a tool to remove the second nut on the energy storage rod on one side of the energy storage piston; S14. Use a rubber mallet to tap the bottom flange of the disc spring, causing the energy storage piston to move away from the high-pressure cylinder. Stop tapping when the energy storage piston is separated from the high-pressure cylinder by 2-5cm.

[0007] In S1, removing the energy storage piston includes the following steps: S15. Use a torque wrench to remove the first nut on one end of the six energy storage rods of the bottom flange of the disc spring, and remove the bottom flange of the disc spring with the front facing upwards; S16. Pull out the six energy storage rods along the running direction of the energy storage rods and place them longitudinally on the bottom flange of the disc spring, and then take out the opening and closing transmission rods; S17. Adjust the tilting fixture so that the high-pressure cylinder body is tilted upward at one end of the energy storage piston, and then pull out the energy storage piston.

[0008] In S2, separating the steel portion of the energy storage piston from the copper portion includes the following steps: S21. Fix the steel part of the energy storage piston with the copper part facing upwards; S22. Cut off the first Teflon sealing ring inside the outer annular groove of the copper part and the inner sealing ring, and remove the first Teflon sealing ring and the sealing ring; S23. Loosen and remove the fixing bolts on the copper part, and use a tool to clamp the outer annular groove and pull it up to separate the copper part from the steel part.

[0009] In S3, removing the old seals on the steel and copper parts includes the following steps: S31. Use a crochet hook to pick out the support ring and the sealing ring on one side of the contact surface between the copper part and the steel part; S32. Then remove the oil scraper ring from the copper part; S33. Remove the two second Teflon seals and the inner sealing ring from the inner cavity of the steel part; S34. Clean the oil stains on the steel and copper parts, check the outer surface of the steel and copper parts and the sealing grooves for deformation or scratches, and polish the minor scratches with a scouring pad.

[0010] In S4, the installation and shaping of the new seal on the steel part includes the following steps: S41. First, install the inner sealing ring in the two sealing grooves of the inner cavity of the steel part; wherein, the sealing ring is coated with grease; S42. The second Teflon sealing ring, after being heated and softened, is bent into a crescent shape and placed into the sealing groove, and the second Teflon sealing ring is shaped.

[0011] Shaping the second Teflon seal includes the following steps: After the second Teflon sealing ring is placed into the sealing groove, use a round wooden stick to press and shape the second Teflon sealing ring initially. Insert the heated steel rod into the inner cavity of the steel section, let it stand for a period of time, and then remove the steel rod; the temperature of the steel rod is controlled at 110-130℃. In S5, the installation and shaping of the new seal on the copper portion includes the following steps: S51. Install the support ring on the contact surface between the copper part and the steel part and the sealing ring on one side, wherein the support ring is located below the sealing ring; S52. Install the oil scraper ring on the copper part; S53. Press the copper part vertically into the steel part; S54. Install fixing bolts; S55. Install the guide cone above the copper part, put the sealing ring for installation into the outer annular groove onto the guide cone, and use a pressing tool to push the sealing ring into the outer annular groove; S56. Place the heated and softened first Teflon sealing ring onto the guide cone, and use a pressing tool to push the first Teflon sealing ring into the outer annular groove; S57. Remove the guide cone and shape the first Teflon seal.

[0012] Shaping the first Teflon seal includes the following steps: After the first Teflon seal is installed into the outer ring groove, the shaping cup is fitted onto the outside of the copper part. After it is stable, the shaping cup is rotated, then left to stand and shape, and finally the shaping cup is pulled out.

[0013] In S6, reinstalling the energy storage piston onto the high-pressure cylinder includes the following steps: S61. Reinstallation of the opening and closing transmission rod: Install a protective cap at the end of the opening and closing transmission rod, and apply lubricant evenly to the piston of the transmission rod and the surface of the protective cap; reinstall the opening and closing transmission rod in the horizontal direction, and do not pull back the opening and closing transmission rod during installation; S62. Energy storage tie rod reinstallation: Put the protective cap on the upper end of the energy storage tie rod and apply lubricating silicone. Reinstall the six energy storage tie rods in the horizontal direction in sequence. Do not pull back the energy storage tie rods during installation. Then install the bottom flange of the disc spring, install the first nut, and install the anti-slip tooling for the energy storage tie rods at the bottom of the high pressure cylinder. S63. Energy Storage Piston Reinstallation: Flip the high-pressure cylinder body to a vertical position using the flipping fixture. Install a thread protection cap on the threaded end of the travel rod and apply grease. Place the energy storage piston on the high-pressure cylinder body, then place a nylon tube on the energy storage piston and tap the nylon tube vertically to reinstall the energy storage piston. Apply thread-locking adhesive to the threads of the energy storage rod, reinstall the second nut, and clean any residual adhesive from the second nut. Then remove the anti-slip fixture for the energy storage rod to complete the energy storage piston reinstallation. During the tightening of the second nut, protect the travel rod and the opening / closing transmission rod.

[0014] The present invention has the following beneficial effects: 1. The present invention discloses a maintenance method for the energy storage piston of the AHMA type operating mechanism. Through steps including removing the energy storage piston from the high-pressure cylinder, disassembling the energy storage piston, removing the old seal of the energy storage piston and conducting overall inspection and cleaning, replacing the new seal of the energy storage piston, and reinstalling the energy storage piston, the maintenance work of this important component of the operating mechanism can be successfully completed by the cooperation of some tooling and maintenance process methods, thus ensuring the overall quality of the overhaul of the operating mechanism.

[0015] 2. The maintenance method for the energy storage piston of the AHMA type operating mechanism disclosed in this invention is a very important and core part of the major overhaul process of many components of the operating mechanism. It has great guiding and reference significance for the overall disassembly and maintenance of the operating mechanism and has great reference value. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a three-dimensional schematic diagram of the high-pressure cylinder body being installed laterally on a flipping fixture.

[0018] Figure 2 This is a schematic diagram from another perspective showing the high-pressure cylinder block mounted laterally on a flipping fixture.

[0019] Figure 3 This is a schematic diagram of a half-section of an energy storage piston.

[0020] Figure 4 A three-dimensional schematic diagram of the steel part of the energy storage piston being shaped by steel rods.

[0021] Figure 5 A three-dimensional schematic diagram of installing a guide cone on the copper part of the energy storage piston.

[0022] Figure 6 This is a three-dimensional schematic diagram of the installation of the first Teflon seal ring using a pressing tool.

[0023] Figure 7 This is a three-dimensional schematic diagram of the first Teflon seal being shaped using a shaping cup.

[0024] Figure 8 This is a three-dimensional schematic diagram of the energy storage piston being reinstalled into the high-pressure cylinder.

[0025] Figure 9 This is a three-dimensional schematic diagram from another perspective when the energy storage piston is reinstalled into the high-pressure cylinder.

[0026] In the picture: High-pressure cylinder body 10, disc spring bottom flange 20, energy storage rod 30, stroke rod 31, second nut 32, first nut 33; Energy storage piston 40, steel part 41, second Teflon seal ring 411, copper part 42, outer ring groove 421, first Teflon seal ring 422, oil scraper ring 423, support ring 424, fixing bolt 43, steel rod 44, guide cone 45, pressing tool 46, shaping cup 47. 50 for opening and closing transmission rods, 60 for anti-slipping fixtures for energy storage rods; Flip tool 100. Detailed Implementation

[0027] See Figure 1-9 As shown, a maintenance method for the energy storage piston of an AHMA type operating mechanism includes the following steps: S1. The energy storage piston 40 on the high-pressure cylinder 10 is pushed out by the energy storage rod 30, and the energy storage piston 40 is removed; S2. Separate the steel part 41 and the copper part 42 of the energy storage piston 40; S3. Remove the old seals on the steel part 41 and the copper part 42, and inspect and clean the steel part 41 and the copper part 42; S4. Installation and shaping of the new sealing ring on steel part 41; S5. Installation and shaping of the new sealing ring on copper part 42; S6. Reinstall the energy storage piston 40 onto the high-pressure cylinder 10.

[0028] By following the above steps, the disassembly and sealing replacement of the energy storage piston of the AHMA type operating mechanism can be successfully completed, ensuring the overall quality of the overhaul of the operating mechanism.

[0029] In S1, see Figure 1 , 2 The process of pushing out the energy storage piston 40 on the high-pressure cylinder 10 via the energy storage rod 30 includes the following steps: S11. After the low-pressure cylinder body of the operating mechanism is lifted out, the high-pressure cylinder body 10 is installed on the flipping fixture 100, and the high-pressure cylinder body 10 is flipped to the horizontal state by the flipping fixture 100.

[0030] S12. Install the bottom flange 20 of the disc spring onto the six energy storage rods 30 and secure it with the first nut 33. Cover the stroke rod 31 extending from the energy storage piston 40 and the opening / closing transmission rod 50 with a cloth for protection to prevent damage to the surfaces of the stroke rod 31 and the opening / closing transmission rod 50 when removing the second nut 32 on the energy storage piston rod 30, which would affect the sealing performance. The tightening torque of the first nut 33 is 120-140 N•m. If the torque value is less than 120 N•m, the energy storage rod 30 will rotate when removing the second nut 32 on the energy storage piston. If the torque value is greater than 140 N•m, the first nut 33 cannot be easily removed after removing the second nut 32.

[0031] S13. Use a wrench to remove the six second nuts 32 on the energy storage rod 30 on one side of the energy storage piston 40.

[0032] S14. Use a rubber mallet to tap the bottom flange 20 of the disc spring, causing the energy storage piston 40 to move away from the high-pressure cylinder 10. Stop tapping when the energy storage piston 40 is separated from the high-pressure cylinder 10 by 2-5cm, so that the energy storage piston 40 can be pulled out later.

[0033] Furthermore, in S1, removing the energy storage piston 40 includes the following steps: S15. Use a torque wrench to remove the first nut 33 on one end of the six energy storage rods 30 of the bottom flange 20 of the disc spring, and remove the bottom flange 20 of the disc spring so that it faces upwards.

[0034] S16. Pull out the six energy storage rods 30 clockwise along the running direction of the energy storage rods 30 and place them longitudinally on the bottom flange 20 of the disc spring. Then take out the opening and closing transmission rod 50. During the removal process, pay attention to the direction of force to avoid damaging the surface of the inner cavity of the energy storage piston.

[0035] S17. Adjust the flipping fixture 100 so that the high-pressure cylinder 10 is tilted upward at one end of the energy storage piston 40 to prevent residual hydraulic oil inside the high-pressure cylinder 10 from splashing during the process of pulling out the energy storage piston 40. Finally, hold the energy storage piston 40 firmly, pull out the energy storage piston 40 with force, and place it on a clean and tidy table.

[0036] In S2, see Figure 4-7Separating the steel portion 41 and the copper portion 42 of the energy storage piston 40 includes the following steps: S21. Fix the steel part 41 of the energy storage piston 40 with the copper part 42 facing upward.

[0037] Specifically, place the energy storage piston 40 with its face upward on a special fixture. The special fixture is equipped with two screws, and two nylon protective studs are threaded through the screws to raise and support the energy storage piston. Place the energy storage piston with its face upward on the two screws and secure it firmly with nuts.

[0038] S22. Use a tool to cut off the first Teflon sealing ring 422 inside the outer annular groove 421 of the copper part 42 and the inner sealing ring, and remove the first Teflon sealing ring 422 and the sealing ring. At this time, a special tool can be used to clamp the outer annular groove 421 of the copper part 42 and pull out the copper part 42.

[0039] S23. Loosen and remove the fixing bolts 43 on the copper part 42, and pull the outer annular groove 421 upward with a tool to separate the copper part 42 from the steel part 41.

[0040] In S3, removing the old seals on the steel part 41 and the copper part 42 includes the following steps: S31. Use a hook to pick out the support ring 424 and the sealing ring on one side of the contact surface between the copper part 42 and the steel part 41.

[0041] S32. Then remove the oil scraper ring 423 from the copper part 42.

[0042] S33. Remove the two second Teflon sealing rings 411 and the inner sealing ring from the inner cavity of the steel part 41.

[0043] S34. Clean the oil stains on the steel part 41 and the copper part 42, check the outer surface of the steel part 41 and the copper part 42 and the sealing groove for deformation or scratches, and polish the minor scratches with a scouring pad.

[0044] The sealing ring on the copper part 42 can be removed using the above method.

[0045] In S4, the installation and shaping of the new sealing ring on the steel part 41 includes the following steps: S41. First, install the inner sealing ring in the two sealing grooves inside the steel part 41; wherein, the sealing ring is coated with grease.

[0046] S42. The softened Teflon sealing ring 411 is bent into a crescent shape and placed into the sealing groove, and the second Teflon sealing ring 411 is shaped. The second Teflon sealing ring 411 is heated in hydraulic oil at 80-120℃ for 60 minutes before being removed.

[0047] Shaping the second Teflon seal 411 includes the following steps: After the second Teflon sealing ring 411 is placed into the sealing groove, use a round wooden stick to press the second Teflon sealing ring 411 to initially shape it; See Figure 4 The heated Φ25 stainless steel bar 44 is inserted into the inner cavity of the steel part 41 and left to stand for 60 minutes to shape it. Then the steel bar 44 is removed. The temperature of the steel bar 44 is controlled between 110-130℃. The above steps are used to install and shape the sealing ring of steel part 41.

[0048] In S5, the installation and shaping of the new sealing ring on the copper portion 42 includes the following steps: S51. Install the support ring 424 on the contact surface between the copper part 42 and the steel part 41 and the sealing ring on one side, wherein the support ring 424 is located below the sealing ring.

[0049] S52. Install the oil scraper ring 423 on the copper part 42.

[0050] S53. Press the copper part 42 vertically onto the steel part 41.

[0051] S54. Install fixing bolts 43; tightening torque 6 N·m.

[0052] S55. See also Figure 5 Install the guide cone 45 above the copper part 42, put the sealing ring for installation into the outer annular groove 421 onto the guide cone 45, and use the pressing tool 46 to push the sealing ring into the outer annular groove 421; S56. See also Figure 6 The first Teflon sealing ring 422, after being heated and softened, is fitted onto the guide cone 45, and the first Teflon sealing ring 422 is pushed into the outer annular groove 421 using the pressing tool 46. S57, Remove the guide cone 45 and shape the first Teflon seal 422.

[0053] Specifically, shaping the first Teflon seal 422 includes the following steps: See Figure 7 After the first Teflon sealing ring 422 is installed into the outer ring groove 421, the shaping cup 47 is fitted onto the outside of the copper part 42. After it is fitted and stabilized, the shaping cup 47 is rotated twice. Then it is left to stand for 30 minutes to shape. Finally, the shaping cup 47 is pulled out.

[0054] The above steps are used to install and shape the sealing ring on the copper part 42.

[0055] In S6, it was terrible. Figure 8 , 9 Reinstalling the energy storage piston 40 onto the high-pressure cylinder 10 includes the following steps: S61. Reinstallation of the opening and closing transmission rod 50: Install a protective cap at the end of the opening and closing transmission rod 50, and apply MOLYKOTE-55 lubricating silicone grease evenly to the piston of the transmission rod and the surface of the protective cap; reinstall the opening and closing transmission rod 50 in the horizontal direction. During installation, do not pull back the opening and closing transmission rod 50 to prevent the protective cap from falling off and damaging the sealing surface.

[0056] S62. Reinstallation of Energy Storage Rods 30: Place protective caps on the upper ends of the energy storage rods 30 and apply lubricating silicone. Reinstall all six energy storage rods 30 sequentially in a horizontal direction. Do not pull back the energy storage rods 30 during installation to prevent the protective caps from falling off and damaging the sealing surfaces. Then install the disc spring bottom flange 20, install the first nut 33, and install the anti-slip fixture 60 on the bottom of the high-pressure cylinder body 10. The anti-slip fixture 60 prevents the disc spring bottom flange 20 and energy storage rods 30 from falling off when the high-pressure cylinder body 10 is in a longitudinal position.

[0057] S63. Reinstallation of Energy Storage Piston 40: Flip the high-pressure cylinder 10 to a vertical position using the flipping fixture 100. Install a threaded protective cap on the threaded end of the travel rod 31 and apply grease. Place the energy storage piston 40 onto the high-pressure cylinder 10, then place a nylon sleeve on the energy storage piston 40 and tap the nylon sleeve vertically to reinstall the energy storage piston 40, ensuring the hole on the energy storage piston aligns with the step face of the travel rod. Apply thread-locking adhesive to the threads of the energy storage rod, reinstall the tightening nut, and tighten to a torque of 200 N•m. Use an insulating sleeve to protect the travel rod 31 and the opening / closing transmission rod 50 to prevent damage from the wrench during operation. Then, use compressed air to blow out any residual adhesive from the nut and clean it thoroughly. Loosen the bolts of the anti-slip fixture 60 and remove it.

[0058] The present invention provides a method for overhauling the energy storage piston of an AHMA type operating mechanism, which can smoothly complete the disassembly, assembly, and seal replacement of the energy storage piston of the AHMA type operating mechanism. It is a very important and core part of the major overhaul process of many components of the operating mechanism, and has great guiding and reference significance for the overall disassembly and overhaul of the operating mechanism.

Claims

1. A method for overhauling the energy storage piston of an AHMA type operating mechanism, characterized in that, Includes the following steps: S1. Push out the energy storage piston (40) on the high-pressure cylinder body (10) by using the energy storage rod (30) to remove the energy storage piston (40); S2. Separate the steel part (41) and the copper part (42) of the energy storage piston (40); S3. Remove the old seals on the steel part (41) and the copper part (42), and inspect and clean the steel part (41) and the copper part (42); S4. Installation and shaping of the new sealing ring on the steel part (41); S5. Installation and shaping of the new sealing ring on the copper part (42); S6. Reinstall the energy storage piston (40) onto the high-pressure cylinder (10); In S1, the process of pushing the energy storage piston (40) on the high-pressure cylinder (10) out via the energy storage rod (30) includes the following steps: S11. After the low-pressure cylinder of the operating mechanism is lifted out, the high-pressure cylinder (10) is installed on the flipping fixture (100), and the high-pressure cylinder (10) is flipped to the horizontal state by the flipping fixture (100); S12. Install the bottom flange (20) of the disc spring on the six energy storage rods (30) and fix it with the first nut (33). Protect the stroke rod (31) extending out of the energy storage piston (40) and the opening and closing transmission rod (50); the tightening torque of the first nut (33) is 120-140 N•m. S13. Use a tool to remove the second nut (32) on the energy storage rod (30) on one side of the energy storage piston (40); S14. Use a rubber mallet to strike the bottom flange (20) of the disc spring, causing the energy storage piston (40) to move away from the high-pressure cylinder (10). Stop striking when the energy storage piston (40) is separated from the high-pressure cylinder (10) by 2-5cm.

2. The maintenance method for the energy storage piston of an AHMA type operating mechanism according to claim 1, characterized in that, In S1, removing the energy storage piston (40) includes the following steps: S15. Use a torque wrench to remove the first nut (33) on one end of the six energy storage rods (30) of the bottom flange (20) of the disc spring, and remove the bottom flange (20) of the disc spring and place it with the front facing upward; S16. Pull out the six energy storage rods (30) along the running direction of the energy storage rods (30) and place them longitudinally on the bottom flange (20) of the disc spring, and then take out the opening and closing transmission rod (50). S17. Adjust the flipping fixture (100) so that the high-pressure cylinder (10) is tilted upward at one end of the energy storage piston (40), and then pull out the energy storage piston (40).

3. The maintenance method for the energy storage piston of an AHMA type operating mechanism according to claim 1, characterized in that, In S2, separating the steel portion (41) and the copper portion (42) of the energy storage piston (40) includes the following steps: S21. Fix the steel part (41) of the energy storage piston (40) with the copper part (42) facing upward; S22. Cut off the first Teflon sealing ring (422) in the outer annular groove (421) of the copper part (42) and the inner sealing ring, and remove the first Teflon sealing ring (422) and the sealing ring. S23. Loosen and remove the fixing bolts (43) on the copper part (42), and pull up the outer annular groove (421) with a tool to separate the copper part (42) from the steel part (41).

4. The maintenance method for the energy storage piston of an AHMA type operating mechanism according to claim 1, characterized in that, In S3, removing the old seals on the steel part (41) and the copper part (42) includes the following steps: S31. Use a hook to pick out the support ring (424) and the sealing ring on one side of the contact surface between the copper part (42) and the steel part (41); S32. Then remove the oil scraper ring (423) from the copper part (42); S33. Remove the two second Teflon sealing rings (411) and the inner sealing ring of the inner cavity of the steel part (41); S34. Clean the oil stains on the steel part (41) and copper part (42), check the outer surface of the steel part (41) and copper part (42) and the sealing groove for any deformation or scratches, and polish the minor scratches with a scouring pad.

5. The maintenance method for the energy storage piston of an AHMA type operating mechanism according to claim 1, characterized in that, In S4, the installation and shaping of the new sealing ring on the steel part (41) includes the following steps: S41. First install the inner sealing ring in the two sealing grooves of the inner cavity of the steel part (41); wherein the sealing ring is coated with grease; S42. The second Teflon sealing ring (411) after being heated and softened is bent into a crescent shape and placed into the sealing groove, and the second Teflon sealing ring (411) is shaped.

6. The maintenance method for the energy storage piston of an AHMA type operating mechanism according to claim 5, characterized in that, Shaping the second Teflon seal (411) includes the following steps: After the second Teflon sealing ring (411) is placed into the sealing groove, the second Teflon sealing ring (411) is first pressed with a round wooden stick to initially shape it; The heated steel rod (44) is inserted into the inner cavity of the steel part (41), left to stand for a period of time, and then the steel rod (44) is removed; wherein the temperature of the steel rod (44) is controlled at 110-130℃.

7. The maintenance method for the energy storage piston of an AHMA type operating mechanism according to claim 1, characterized in that, In S5, the installation and shaping of the new sealing ring on the copper part (42) includes the following steps: S51. Install a support ring (424) on the contact surface between the copper part (42) and the steel part (41) and a sealing ring on one side, wherein the support ring (424) is located below the sealing ring; S52. Install the oil scraper ring (423) on the copper part (42); S53. Press the copper part (42) vertically onto the steel part (41); S54. Install fixing bolts (43); S55. Install the guide cone (45) above the copper part (42), put the sealing ring for installation in the outer ring groove (421) onto the guide cone (45), and push the sealing ring into the outer ring groove (421) using the pressing tool (46). S56. The first Teflon sealing ring (422) after being heated and softened is put onto the guide cone (45), and the first Teflon sealing ring (422) is pushed into the outer annular groove (421) by the pressing tool (46); S57. Remove the guide cone (45) and shape the first Teflon seal (422).

8. A method for overhauling the energy storage piston of an AHMA type operating mechanism according to claim 7, characterized in that, Shaping the first Teflon seal (422) includes the following steps: After the first Teflon sealing ring (422) is installed into the outer ring groove (421), the shaping cup (47) is put into the outside of the copper part (42). After the shaping cup (47) is stable, it is rotated and then left to stand to shape. Finally, the shaping cup (47) is pulled out.

9. A method for overhauling the energy storage piston of an AHMA type operating mechanism according to claim 1, characterized in that, In S6, reinstalling the energy storage piston (40) onto the high-pressure cylinder (10) includes the following steps: S61. Reinstallation of the opening and closing transmission rod (50): Install a protective cap at the end of the opening and closing transmission rod (50), and apply lubricating grease evenly to the piston of the transmission rod and the surface of the protective cap; reinstall the opening and closing transmission rod (50) in the horizontal direction. It is forbidden to pull back the opening and closing transmission rod (50) during installation. S62. Reinstallation of energy storage rods (30): Put a protective cap on the upper end of the energy storage rods (30) and apply lubricating silicone. Reinstall the six energy storage rods (30) in sequence along the horizontal direction. Do not pull back the energy storage rods (30) during installation. Then install the bottom flange (20) of the disc spring, install the first nut (33), and install the anti-slip tooling (60) on the bottom of the high pressure cylinder (10). S63. Reinstallation of the energy storage piston (40): The high-pressure cylinder body (10) is flipped to a vertical position by using the flipping tool (100). A thread protection cap is installed on the threaded end of the stroke rod (31) and grease is applied. The energy storage piston (40) is placed on the high-pressure cylinder body (10). Then, a nylon tube is placed on the energy storage piston (40), and the nylon tube is struck vertically. The energy storage piston (40) is reinstalled. Thread locking glue is applied to the thread of the energy storage rod (30). The second nut (32) is reinstalled. The residual glue at the second nut (32) is cleaned. Then, the anti-slip tool (60) for the energy storage rod is removed, and the reinstallation of the energy storage piston (40) is completed. When tightening the second nut (32), the stroke rod (31) and the opening and closing transmission rod (50) are protected.

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