Electron beam bellows

Abstract

The present invention belongs to the technical field of mechanical vacuum sealing, and specifically relates to an electron beam bellows, comprising a metal bellows, two-way connecting screws and a connecting shaft. The bellows is connected to a motor shaft and a flap valve respectively through the two-way connecting screws and the connecting shaft running through the inside of the bellows, thereby realizing a sealed connection between the vacuum welding chamber of an electron beam welder and the motor; realizing the localization of the bellows components of the electron beam welder; reducing the time cycle and cost of purchasing bellows components, and solving the problem of difficulty in purchasing spare parts; reducing the probability of failure and the difficulty of repair caused by a broken motor shaft; improving the assembly accuracy of the bellows and the stability of the equipment, and facilitating maintenance.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical vacuum sealing, and in particular relates to an electron beam bellows. Background Art

[0002] This project primarily involves the development of bellows components for electron beam welding machines. Due to their sealing properties, bellows are widely used in the nuclear and aerospace industries to seal precision components. Countries around the world have strict design and inspection standards for bellows, such as the US ASME Standard, Volume VIII, Division I, Appendix 26, "Expansion Joints for Pressure Vessels and Heat Exchangers," Japan's JIS B235, "Bells Expansion Joints," the Russian standard ΓOCT21744, "Technical Requirements for Multilayer Metal Bellows," and China's GB / T12777-2008, "General Technical Requirements for Metal Bellows Expansion Joints." These standards all set requirements for bellows design and manufacturing, making them incompatible across countries.

[0003] Currently, China uses Russian electron beam welding machines, which were manufactured over 20 years ago. The bellows structure is poorly designed, with the motor shaft extending directly into the bellows. A shaft breakage accident requires disassembly of the complex motor for repair, making maintenance inconvenient. The bellows components also wear out quickly, requiring a short replacement cycle. Summary of the Invention

[0004] The present invention addresses the aforementioned deficiencies in the prior art by providing an electron beam bellows. This invention achieves localization of bellows components for electron beam welding machines; reduces the procurement time and cost of bellows components, resolving the difficulty of procuring spare parts; reduces the probability of failure and repair difficulty caused by motor shaft breakage; and improves bellows assembly accuracy and equipment stability, facilitating maintenance.

[0005] The technical solutions of the present invention are as follows:

[0006] An electron beam bellows comprises a metal bellows, two bidirectional connecting screws and a connecting shaft. The bellows is connected to a motor shaft and a flap valve respectively through the two bidirectional connecting screws and the connecting shaft running through the bellows, thereby achieving a sealed connection between the vacuum welding chamber of the electron beam welder and the motor.

[0007] The two-way connecting screws at both ends are connected to the connecting shaft by threaded fit; the bellows is connected to the flange ring by welding, and the flange ring is fixed to the flange cover by welding; the two-way connecting screws at both ends are sealed by threaded fit; the bellows is connected and fixed to the connecting shaft by welding; the connecting shaft is assembled with the trapezoidal nut by threaded fit;

[0008] At the end connected to the motor shaft, the bellows is welded to the part of the flange ring embedded in the bellows, and the flange ring is welded and fixed to the flange cover. The connecting screw is sealed, fixed and connected to the bellows through its own external thread and the flange cover thread;

[0009] On the side connected to the flap valve, one end of the connecting shaft is welded to the bellows to achieve connection and sealing between the bellows and the connecting shaft;

[0010] An electron beam bellows has three points punched at intervals of 120 degrees on the thread end face to prevent the trapezoidal nut from falling off during the operation of the bellows component.

[0011] An electron beam bellows, one end of the bellows is connected to the motor through two-way connecting screws, and the other end is connected to the flap valve through a connecting shaft. Inside the bellows, the two-way connecting screws are inserted into the connecting shaft. When the motor shaft rotates, it drives the two-way connecting screws, the connecting shaft, and the flap valve shaft to rotate together, thereby realizing a sealed connection between the vacuum welding chamber and the motor and the conversion between low vacuum and high vacuum.

[0012] An electron beam bellows, after the connecting shaft is assembled with the trapezoidal nut through the internal thread, a point is punched on the thread end face to prevent the trapezoidal nut from rotating out of the connecting shaft, and the trapezoidal thread must not be damaged during the punching.

[0013] The utility model relates to an electron beam bellows, which is connected to the shaft of a flap valve through a connecting shaft and a trapezoidal nut.

[0014] An electron beam bellows is made of 1Cr18Ni9 stainless steel, has an outer diameter of 47 mm, an inner diameter of 32 mm, a wall thickness of 0.16 mm, and a wave thickness of 2.1 mm.

[0015] The invention relates to an electron beam bellows, wherein two-way connecting screws at both ends, a connecting shaft and a flange ring are all made of 1Cr18Ni9 stainless steel.

[0016] The beneficial effects of the present invention are:

[0017] The present invention reduces the time cycle and cost of purchasing bellows components, solves the problem of difficulty in purchasing spare parts; reduces the failure probability and repair difficulty caused by motor shaft breakage; improves the assembly accuracy of the bellows and the stability of the equipment, and facilitates maintenance.

[0018] It also doubles the renewal cycle of bellows components and triples the efficiency of fault assembly and disassembly. It can be extended to other similar vacuum equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of an electron beam bellows of the present invention.

[0020] In the figure: 1-two-way connecting screws; 2-flange ring; 3-flange cover; 4-connecting shaft; 5-bellows; 6-trapezoidal nut. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] An electron beam bellows component of the present invention mainly comprises two parts, a bellows 5, two-way connecting screws 1 at both ends and a connecting shaft 4.

[0023] The bellows 5 is made of 1Cr18Ni9 stainless steel, with an outer diameter of 47 mm, an inner diameter of 32 mm, a wall thickness of 0.16 mm, and a wave thickness of 2.1 mm.

[0024] The two-way connecting screws 1 at both ends, the connecting shaft 4 and the flange ring 2 are all made of 1Cr18Ni9 stainless steel.

[0025] The bellows 5 is connected to the motor shaft and the flap valve respectively through the two bidirectional connecting screws 1 and the connecting shaft 4 running through the inside thereof, thereby realizing a sealed connection between the vacuum welding chamber of the electron beam welding machine and the motor.

[0026] The two-way connecting screws 1 are connected to the connecting shaft 4 by threaded fitting; the bellows 5 is connected to the flange ring 2 by welding, and the flange ring 2 is fixed to the flange cover 3 by welding; the two-way connecting screws 1 are sealed by threaded fitting; the bellows 5 is connected and fixed to the connecting shaft 4 by welding; the connecting shaft 4 is assembled with the trapezoidal nut 6 by threaded fitting, and 3 points are punched at 120° intervals on the end face of the thread to prevent the trapezoidal nut 6 from falling off during the operation of the bellows 5 component.

[0027] At the end connected to the motor shaft, the bellows 5 is welded to the part of the flange ring 2 embedded in the bellows 5, and the flange ring 2 is then welded and fixed to the flange cover 3. The connecting screw is sealed, fixed and connected to the bellows 5 through its own external thread and the thread of the flange cover 3.

[0028] The motor shaft is inserted into the screw to drive the screw to rotate.

[0029] The Russian product does not have a connecting screw. The bellows 5 is directly connected to the motor shaft, and the motor shaft is inserted into the bellows 5. If the motor shaft breaks, the motor needs to be disassembled. In contrast, the motor shaft is inserted into the screw. If the motor shaft breaks, the internal thread of the screw can be used to remove the motor shaft, avoiding the complex work of disassembling the motor and simplifying the difficulty of troubleshooting.

[0030] On the side connected to the flap valve, one end of the connecting shaft 4 is welded to the bellows 5, ensuring a tight connection and seal between the two. After the connecting shaft 4 is assembled with the trapezoidal nut 6 via the internal threads, punch at least three points on the threaded end to prevent the trapezoidal nut 6 from rotating out of the connecting shaft 4. Do not damage the trapezoidal threads during punching. The bellows 5 is connected to the flap valve shaft via the connecting shaft 4 and the trapezoidal nut 6.

[0031] One end of the bellows 5 is connected to the motor through a two-way connecting screw 1, and the other end is connected to the flap valve through a connecting shaft 4. Inside the bellows 5, the two-way connecting screw 1 is inserted into the connecting shaft 4. When the motor shaft rotates, it drives the two-way connecting screw 1, the connecting shaft 4, and the flap valve shaft to rotate together, realizing the sealed connection between the vacuum welding chamber and the motor and the conversion between low vacuum and high vacuum.

[0032] The bellows 5 consists of two-way connecting screws 1, flange ring 2, flange cover 3, connecting shaft 4, bellows 5, and trapezoidal nut 6. The bellows 5 is made of 1Cr18Ni9 stainless steel with an outer diameter of 47mm, an inner diameter of 32mm, a wall thickness of 0.16mm, and a corrugated thickness of 2.1mm. It is connected to the motor through the two-way connecting screws 1 and to the flap valve through the connecting shaft 4, achieving a sealed connection between the motor and the vacuum welding chamber of the electron beam welder and switching from low vacuum to high vacuum.

[0033] On the side connected to the motor shaft, the bellows 5 and the portion of the flange ring 2 embedded in the bellows 5 are connected by welding, and the outer edge of the flange ring 2 is then welded and fixed to the inner wall of the flange cover 3. The two-way connecting screws 1 are sealed, fixed and connected to the bellows 5 through their own external threads and the threads of the flange cover 3. The motor shaft is inserted into the interior of the screw to drive the screw to rotate. Russian products do not have two-way connecting screws 1. The bellows 5 is directly connected to the motor shaft, and the motor shaft is inserted into the interior of the bellows 5. Once the motor shaft breaks, the complex motor part needs to be disassembled. In the present invention, the motor shaft is inserted into the screw. When the motor shaft breaks, the motor shaft can be taken out using the internal threads of the screw, avoiding the complicated work of disassembling the motor and simplifying the difficulty of fault repair.

[0034] On the side connected to the flap valve, one end of the connecting shaft 4 is welded to the bellows 5. After the connecting shaft 4 is assembled with the trapezoidal nut 6 via internal threads, punch points (at least three, evenly spaced) on the threaded end to prevent the trapezoidal nut 6 from rotating out of the connecting shaft 4. The punching process should not damage the trapezoidal threads. The trapezoidal nut 6 is made of QSn6.5-0.4 copper alloy and is connected to the flap valve's rotating shaft via internal threads. The bellows 5 is sealed, secured, and connected to the flap valve via the connecting shaft 4 and trapezoidal nut 6.

[0035] One end of the bellows 5 is connected to the motor through a two-way connecting screw 1, and the other end is connected to the flap valve through a connecting shaft 4. Inside the bellows 5, the two-way connecting screws 1 are inserted into the connecting shaft 4. Through threaded fit, when the motor shaft rotates, the motor shaft drives the two-way connecting screws 1, the connecting shaft 4, and the flap valve shaft to rotate together, realizing a sealed connection between the vacuum welding chamber and the motor and the conversion between low vacuum and high vacuum.

Claims

1. An electron beam bellows, comprising a metal bellows, two bidirectional connecting screws, and a connecting shaft. The bellows is connected to a motor shaft and a flap valve, respectively, via the bidirectional connecting screws and the connecting shaft, thereby achieving a sealed connection between the vacuum welding chamber of an electron beam welder and the motor. Its characteristics are: The two-way connecting screws at both ends are connected to the connecting shaft by threaded fit; the bellows is connected to the flange ring by welding, and the flange ring is fixed to the flange cover by welding; the two-way connecting screws at both ends are sealed by threaded fit; the bellows is connected and fixed to the connecting shaft by welding; the connecting shaft is assembled with the trapezoidal nut by threaded fit; At the end connected to the motor shaft, the bellows is welded to the part of the flange ring embedded in the bellows, and the flange ring is welded and fixed to the flange cover. The connecting screw is sealed, fixed and connected to the bellows through its own external thread and the flange cover thread; On the side connected to the flap valve, one end of the connecting shaft is welded to the bellows to achieve connection and sealing between the bellows and the connecting shaft; One end of the bellows is connected to the motor through two-way connecting screws, and the other end is connected to the flap valve through a connecting shaft. Inside the bellows, the two-way connecting screws are inserted into the connecting shaft. When the motor shaft rotates, it drives the two-way connecting screws, the connecting shaft, and the flap valve shaft to rotate together, realizing the sealed connection between the vacuum welding chamber and the motor and the conversion between low vacuum and high vacuum. Punch 3 points at 120° intervals on the thread end face to prevent the trapezoidal nut from falling off during the operation of the bellows component.

2. The electron beam bellows according to claim 1, wherein: After the connecting shaft is assembled with the trapezoidal nut through the internal thread, punch a point on the end face of the thread to prevent the trapezoidal nut from rotating out of the connecting shaft. The trapezoidal thread must not be damaged when punching.

3. The electron beam bellows according to claim 1, wherein: The bellows is connected to the shaft of the flap valve through a connecting shaft and a trapezoidal nut.

4. The electron beam bellows according to claim 1, wherein: The bellows is made of 1Cr18Ni9 stainless steel with an outer diameter of 47mm, an inner diameter of 32mm, a wall thickness of 0.16mm and a wave thickness of 2.1mm.

5. The electron beam bellows according to claim 1, wherein: The two-way connecting screws at both ends, the connecting shaft and the flange ring are all made of 1Cr18Ni9 stainless steel.

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