A single degree of freedom adjusted three-dimensional tension rod device and use method

Abstract

The application discloses a single-freedom-adjusted three-dimensional pull rod device and a use method, in the three-dimensional pull rod device, a second 300K pull rod seat is connected with a first 300K pull rod seat through an axially movable carbon fiber shaft, axial freedom adjustment of a superconducting coil is realized, the first 300K pull rod seat and the second 300K pull rod seat are connected through radial adjusting bolts, horizontal direction freedom adjustment of the superconducting coil is realized, the carbon fiber pull rod is connected with the first 300K pull rod seat and a first low-temperature end pull rod seat through bolts, and meanwhile, the carbon fiber pull rod is connected with a heat sink and a cold screen to reduce heat leakage, the second low-temperature end pull rod seat is fixedly connected with a coil framework, and meanwhile, the second low-temperature end pull rod seat is connected with the first low-temperature end pull rod seat through spherical surface contact to increase thermal resistance, the first low-temperature end pull rod seat and the second low-temperature end pull rod seat are connected through radial adjusting bolts, and horizontal direction freedom adjustment of the superconducting coil is realized. The application can realize cold-state multi-freedom adjustment of a superconducting magnet coil position, and ensures position accuracy and balanced force bearing of the pull rod.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of superconducting magnets, and particularly relates to a single-degree-of-freedom adjusted three-dimensional pull rod device and a use method. BACKGROUND

[0002] At present, thanks to the continuous progress of superconducting material manufacturing technology, superconducting magnets have realized large-scale commercial application. A superconducting magnet is mainly composed of a magnet body, a thermal radiation shielding layer, and a vacuum container and other key components. The connection between these components mainly depends on the pull rod structure. In a superconducting magnet system, the pull rod serves as the main bearing structure, and the main forces borne by the pull rod include the gravity of the cold mass, the stress generated by cold shrinkage, and the pre-tightening force applied during installation.

[0003] In the actual assembly process, due to unavoidable assembly errors, the load distribution may be uneven. Therefore, after the assembly of the magnet is completed, the position of the magnet must be fine-tuned to ensure that the forces borne by each pull rod are balanced. For a horizontal-axis superconducting magnet system, a three-dimensional pull rod structure can realize multi-directional force bearing in the axial, radial and normal directions, and at the same time, the number of pull rods can be reduced to reduce system heat leakage. However, in a low-temperature environment, the direct adjustment function of the three-dimensional pull rod is limited, and accurate positioning of the magnet in a single direction cannot be achieved, which makes the process of adjusting the relative position of the magnet time-consuming and complex. SUMMARY

[0004] To solve the above technical problems, the application provides a single-degree-of-freedom adjusted three-dimensional pull rod device and a use method, which can realize single three-dimensional pull rod single-degree-of-freedom adjustment of a superconducting magnet in a low-temperature state, and accurately control the position of the magnet, so that the forces borne by each pull rod are more balanced. In the magnet transportation state, a buffer can be provided to make the pull rod group in a state of mechanical balance, and avoid pull rod fracture accidents.

[0005] To achieve the above purpose, the application adopts the following technical solutions:

[0006] A single-degree-of-freedom adjusted three-dimensional pull rod device, comprising a first 300K pull rod seat, a second 300K pull rod seat, a 300K end axial adjustment bolt, a 300K end radial adjustment bolt, an upper end carbon fiber shaft, a spring, a gasket, an upper end adjustment nut, a ball gasket, a bellows, a sealing sleeve, a carbon fiber pull rod, a heat sink, a first low-temperature end pull rod seat, a second low-temperature end pull rod seat, a low-temperature end radial adjustment bolt, a lower end carbon fiber shaft, a lower end cover plate, a lower end adjustment nut, and a threaded sleeve.

[0007] The second 300K pull rod seat is connected with the vacuum container, the lower end surface of the second 300K pull rod seat is welded with the bellows, the bellows is welded with the sealing sleeve, and the sealing sleeve is glued with the carbon fiber pull rod.

[0008] The first 300K pull rod seat is internally machined with a guide groove, a threaded hole is machined above the guide groove, and a 300K end axial adjusting bolt is installed; an upper end carbon fiber shaft, a spring and a gasket are installed in the guide groove, the upper end carbon fiber shaft is installed above the spring, and the spring is installed above the gasket; the upper end carbon fiber shaft can reciprocate along the guide groove in the axial direction, and the first 300K pull rod seat is connected with the second 300K pull rod seat.

[0009] The upper end of the carbon fiber pull rod is fixedly connected with a threaded sleeve, the lower end of the carbon fiber pull rod is fixedly connected with a threaded sleeve, the threaded sleeve is bolted with the first low-temperature end pull rod seat, the first low-temperature end pull rod seat is connected with the second low-temperature end pull rod seat, and the second low-temperature end pull rod seat is bolted with the superconducting magnet framework; a lower end carbon fiber shaft is installed between the first low-temperature end pull rod seat and the lower end cover plate, and a spherical protrusion is machined on the end face of the lower end carbon fiber shaft and is in point contact with the second low-temperature end pull rod seat.

[0010] A method for using a single-degree-of-freedom-adjusted three-dimensional pull rod device, suitable for the above single-degree-of-freedom-adjusted three-dimensional pull rod device, comprising:

[0011] Step one, adjust the 300K end axial adjusting bolt so that the screw length between the 300K end axial adjusting bolt and the second 300K pull rod seat is consistent; adjust the 300K end radial adjusting bolt so that the second 300K pull rod seat is coaxial with the first 300K pull rod seat, and adjust the low-temperature end radial adjusting screw so that the second low-temperature end pull rod seat is coaxial with the first low-temperature end pull rod seat;

[0012] Step two, install the second 300K pull rod seat on the vacuum container, and install the second low-temperature end pull rod seat on the low-temperature framework;

[0013] Step three, rotate the 300K end radial adjusting bolt and the low-temperature end radial adjusting screw in turn counterclockwise or clockwise to make the magnet move horizontally along a single direction, thereby adjusting the relative position of the magnet and the vacuum container in the horizontal direction; without adjusting the length of the carbon fiber pull rod, rotate the 300K end axial adjusting bolt in turn counterclockwise or clockwise to make the magnet move vertically, thereby adjusting the relative position of the magnet and the vacuum container in the vertical direction;

[0014] Step four, rotate the 300K end axial adjusting bolt counterclockwise or clockwise to further compress the spring, thereby changing the damping stiffness of the entire magnet.

[0015] The beneficial effects of the present application are:

[0016] The second 300K pull rod seat is internally provided with a spring, which can reduce the vibration of the magnet during transportation, and can also change the damping stiffness according to the weight of the magnet, thereby ensuring that the framework does not collide with external parts during transportation.

[0017] The radial adjusting bolt and the axial adjusting bolt are arranged between the first and second 300K rod seats, and the rod group is provided with a bellows, so that the relative position between the framework and the 300K container in a single direction can be adjusted under normal temperature or low temperature conditions.

[0018] The axial adjusting bolt and the carbon fiber shaft are provided with a spring, so that the impact force of the rod during transportation can be reduced, the shock stiffness can be adjusted to adapt to various road conditions, and the fracture of a single rod due to excessive stress can be avoided.

[0019] The lower end carbon fiber shaft is processed with a spherical protrusion, so that the contact thermal resistance between the rod group and the low temperature framework is increased, and the conduction heat leakage of the rod group to the magnet is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the single degree of freedom adjusting three-dimensional rod device of the application;

[0021] Figure 2 is a high temperature end sectional view of the single degree of freedom adjusting three-dimensional rod device of the application;

[0022] Figure 3 is a low temperature end sectional view of the single degree of freedom adjusting three-dimensional rod device of the application;

[0023] Figure 4 is a low temperature end schematic view of the single degree of freedom adjusting three-dimensional rod device of the application;

[0024] Figure 5 is a high temperature structural schematic view of the single degree of freedom adjusting three-dimensional rod device of the application.

[0025] In the figure: 1-first 300K rod seat; 2-second 300K rod seat; 3-300K end axial adjusting bolt; 4-300K end radial adjusting bolt; 5-upper end carbon fiber shaft; 6-spring; 7-gasket; 8-upper end adjusting nut; 9-ball gasket; 10-bellows; 11-sealing sleeve; 12-carbon fiber rod; 13-heat sink; 14-first low temperature end rod seat; 15-second low temperature end rod seat; 16-low temperature end radial adjusting bolt; 17-lower end carbon fiber shaft; 18-lower end cover plate; 19-lower end adjusting nut; 20-threaded sleeve. DETAILED DESCRIPTION

[0026] In order for those skilled in the art to better understand the technical solutions of the application, the technical solutions of the application will be further described below in combination with the drawings and through specific embodiments.

[0027] As Figures 1-5As shown, the present application provides a single degree of freedom adjustment three-dimensional pull rod device, comprising a first 300K pull rod seat 1; a second 300K pull rod seat 2; a 300K end axial adjustment bolt 3; a 300K end radial adjustment bolt 4; an upper end carbon fiber shaft 5; a spring 6; a gasket 7; an upper end adjustment nut 8; a ball pad 9; a bellows 10; a sealing sleeve 11; a carbon fiber pull rod 12; a heat sink 13; a first low temperature end pull rod seat 14; a second low temperature end pull rod seat 15; a low temperature end radial adjustment bolt 16; a lower end carbon fiber shaft 17; a lower end cover plate 18; a lower end adjustment nut 19; a threaded sleeve 20.

[0028] The second 300K pull rod seat 2 is connected with the vacuum container, in an embodiment, the second 300K pull rod seat 2 is connected with the vacuum container through threads, and a sealing ring is arranged between the second 300K pull rod seat 2 and the vacuum container. The lower end surface of the second 300K pull rod seat 2 is welded with the bellows 10, the bellows 10 is welded with the sealing sleeve 11, and the sealing sleeve 11 is glued with the carbon fiber pull rod 12, so as to realize sealing between the pull rod group and the vacuum container.

[0029] The first 300K pull rod seat 1 is internally processed with a guide groove, a thread is processed above the guide groove and the 300K end axial adjustment bolt 3 is arranged on the thread; the guide groove is internally arranged with the upper end carbon fiber shaft 5, the spring 6 and the gasket 7, the upper end carbon fiber shaft 5 is arranged above the spring 6, the spring 6 is arranged above the gasket 7, and the upper end carbon fiber shaft 5 can reciprocate along the guide groove in the axial direction, so as to realize adjustment of the relative position between the skeleton and the vacuum container in the vertical direction. The first 300K pull rod seat 1 is connected with the second 300K pull rod seat 2, in an embodiment, the first 300K pull rod seat 1 is connected with the second 300K pull rod seat 2 through the 300K end radial adjustment bolt 4, so as to realize adjustment of the degree of freedom of the pull rod group in the horizontal direction.

[0030] The upper end of the carbon fiber pull rod 12 is fixedly connected with the threaded sleeve 20, the threaded sleeve 20 is connected with the upper end adjustment nut 8 through a bolt, the lower surface of the upper end adjustment nut 8 is processed with a conical surface and connected with the ball pair of the ball pad 9, and the ball pad 9 is arranged in the positioning groove arranged on the upper end surface of the second 300K pull rod seat 2. The middle part of the carbon fiber pull rod 12 can be arranged with the heat sink 13, the heat sink 13 is connected with the cold screen, and heat conduction leakage of the pull rod is reduced. The lower end of the carbon fiber pull rod 12 is also fixedly connected with the threaded sleeve 20, the threaded sleeve 20 is connected with the lower end adjustment nut 19 through a bolt, the lower surface of the lower end adjustment nut 19 is processed with a conical surface and connected with the ball pair of the ball pad 9, and the ball pad 9 is arranged in the positioning groove arranged on the lower end surface of the first low temperature end pull rod seat 14.

[0031] The first low-temperature end tie rod base 14 is connected with the second low-temperature end tie rod base 15, and in an embodiment, the connection can be achieved through a low-temperature end radial adjusting screw 16, while the second low-temperature end tie rod base 15 is bolted with the superconducting magnet framework, and the lower end carbon fiber shaft 17 is installed between the first low-temperature end tie rod base 14 and the lower end cover plate 18, the end face of the lower end carbon fiber shaft 17 is processed with a spherical protrusion and is in point contact with the second low-temperature end tie rod base 15, so as to reduce the conduction heat leakage of the tie rod set to the magnet.

[0032] The vacuum container needs to provide several horizontal planes for the installation of the second 300K tie rod base 2, and before the installation of the tie rod set, the 300K end axial adjusting screw 3 needs to be adjusted so as to be consistent with the screwing length between the second 300K tie rod base 2; the 300K end radial adjusting screw 4 is adjusted so as to make the second 300K tie rod base 2 coaxial with the first 300K tie rod base 1, and the low-temperature end radial adjusting screw 16 is adjusted so as to make the second low-temperature end tie rod base 15 coaxial with the first low-temperature end tie rod base 14.

[0033] The second 300K tie rod base 2 of the tie rod set is installed on the vacuum container, and during the installation, a sealing rubber ring needs to be installed between the second 300K tie rod base 2 and the vacuum container, and a bolt is used for locking. The second low-temperature end tie rod base 15 is installed on the low-temperature framework, and a bolt is used for locking.

[0034] Generally, a plurality of groups of tie rods are arranged symmetrically along the horizontal plane and the vertical plane of the superconducting magnet, and there is a certain angle between each group of tie rods and the magnet and the vacuum container. Here, it is assumed that Z represents the vertical direction, and X and Y represent the horizontal direction. It is assumed that the relative position of the magnet and the vacuum container along the horizontal direction needs to be adjusted, and the 300K end radial adjusting screw 4 and the low-temperature end radial adjusting screw 16 are rotated counterclockwise or clockwise in sequence, so as to make the magnet move along a single horizontal direction. It is assumed that the relative position of the magnet and the 300K Dewar along the vertical direction needs to be adjusted, and without adjusting the length of the carbon fiber tie rod 12, the 300K end axial adjusting screw 3 is rotated counterclockwise or clockwise in sequence, so as to make the magnet move along the vertical direction.

[0035] The spring 6 is installed between the upper end carbon fiber shaft 5 and the first 300K tie rod base 1, and can achieve the vibration reduction of the magnet during transportation. If the vibration reduction stiffness needs to be adjusted, the 300K end axial adjusting screw 3 is further rotated counterclockwise or clockwise, so as to compress the spring 6 and change the vibration reduction stiffness of the entire magnet.

[0036] Therefore, according to the embodiment of the present application, a use method of the single-degree-of-freedom-adjusted three-dimensional tie rod device is also provided, and the use method comprises the following steps:

[0037] Step one, adjust the 300K end axial adjusting bolt 3 to make the screw length consistent between the second 300K pull rod base 2; adjust the 300K end radial adjusting bolt 4 to make the second 300K pull rod base 2 coaxial with the first 300K pull rod base 1, and adjust the low temperature end radial adjusting screw 16 to make the second low temperature end pull rod base 15 coaxial with the first low temperature end pull rod base 14. Among them, the vacuum container provides several horizontal surfaces for the installation of the second 300K pull rod base 2.

[0038] Step two, install the second 300K pull rod base 2 on the vacuum container. A sealing rubber ring can be installed between the second 300K pull rod base 2 and the vacuum container during installation, and locked with a bolt. Install the second low temperature end pull rod base 15 on the low temperature framework, and lock with a bolt.

[0039] Step three, rotate the 300K end radial adjusting bolt 4 and the low temperature end radial adjusting screw 16 counterclockwise or clockwise in sequence to make the magnet translate in a single horizontal direction, thereby adjusting the relative position of the magnet and the vacuum container in the horizontal direction; without adjusting the length of the carbon fiber pull rod, rotate the 300K end axial adjusting bolt 3 counterclockwise or clockwise in sequence to make the magnet move in the vertical direction, thereby adjusting the relative position of the magnet and the vacuum container in the vertical direction.

[0040] Step four, rotate the 300K end axial adjusting bolt 3 counterclockwise or clockwise to further compress the spring 6, thereby changing the damping stiffness of the entire magnet.

[0041] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A three-dimensional tension rod device with single degree of freedom adjustment, characterized by, The first 300K pull rod seat (1), the second 300K pull rod seat (2), the 300K end axial adjusting bolt (3), the 300K end radial adjusting bolt (4), the upper end carbon fiber shaft (5), the spring (6), the gasket (7), the upper end adjusting nut (8), the ball pad (9), the bellows (10), the sealing sleeve (11), the carbon fiber pull rod (12), the heat sink (13), the first low temperature end pull rod seat (14), the second low temperature end pull rod seat (15), the low temperature end radial adjusting bolt (16), the lower end carbon fiber shaft (17), the lower end cover plate (18), the lower end adjusting nut (19), the threaded sleeve (20); The second 300K pull rod seat (2) is connected with the vacuum container, and the lower end face of the second 300K pull rod seat (2) is welded with the bellows (10), the bellows (10) is welded with the sealing sleeve (11), and the sealing sleeve (11) is glued with the carbon fiber pull rod (12); The first 300K pull rod seat (1) is internally processed with a guide groove, and a thread is processed above the guide groove and is provided with the 300K end axial adjusting bolt (3); the guide groove is internally provided with the upper end carbon fiber shaft (5), the spring (6) and the gasket (7), the upper end of the upper end carbon fiber shaft (5) is provided with the spring (6), the spring (6) is provided with the gasket (7), and the upper end carbon fiber shaft (5) can reciprocate along the guide groove in the axial direction, and the first 300K pull rod seat (1) is connected with the second 300K pull rod seat (2); The upper end of the carbon fiber pull rod (12) is fixedly connected with the threaded sleeve (20); the lower end of the carbon fiber pull rod (12) is fixedly connected with the threaded sleeve (20), the threaded sleeve (20) fixedly connected with the lower end of the carbon fiber pull rod (12) is bolted with the first low temperature end pull rod seat (14), the first low temperature end pull rod seat (14) is connected with the second low temperature end pull rod seat (15), the second low temperature end pull rod seat (15) is bolted with the superconducting magnet framework, and the first low temperature end pull rod seat (14) and the lower end cover plate (18) are provided with the lower end carbon fiber shaft (17), the end face of the lower end carbon fiber shaft (17) is processed with a spherical protrusion and is in point contact with the second low temperature end pull rod seat (15); The first 300K pull rod seat (1) and the second 300K pull rod seat (2) are connected through the 300K end radial adjusting bolt (4); The first low temperature end pull rod seat (14) and the second low temperature end pull rod seat (15) are connected through the low temperature end radial adjusting bolt (16).

2. The single degree of freedom adjusted three-dimensional tension rod device according to claim 1, characterized in that, The second 300K pull rod seat (2) is connected with the vacuum container through threads.

3. The single degree of freedom adjusted three-dimensional tension rod device according to claim 2, characterized in that, A sealing ring is arranged between the second 300K pull rod seat (2) and the vacuum container.

4. The single degree of freedom adjusted three-dimensional tension rod device according to claim 1, characterized in that, The heat sink (13) is arranged in the middle of the carbon fiber pull rod (12), and the heat sink (13) is connected with a cold screen.

5. The single degree of freedom adjusted three-dimensional tension rod device according to claim 1, characterized in that, The spring is arranged between the upper end carbon fiber shaft (5) and the first 300K pull rod seat (1).

6. A method of using a single degree of freedom adjusted three-dimensional tension rod device, suitable for use in a single degree of freedom adjusted three-dimensional tension rod device according to any one of claims 1-5, characterized in that, The first 300K pull rod seat (1), the second 300K pull rod seat (2), the 300K end axial adjusting bolt (3), the 300K end radial adjusting bolt (4), the upper end carbon fiber shaft (5), the spring (6), the gasket (7), the upper end adjusting nut (8), the ball pad (9), the bellows (10), the sealing sleeve (11), the carbon fiber pull rod (12), the heat sink (13), the first low temperature end pull rod seat (14), the second low temperature end pull rod seat (15), the low temperature end radial adjusting bolt (16), the lower end carbon fiber shaft (17), the lower end cover plate (18), the lower end adjusting nut (19), the threaded sleeve (20); Step one, adjust the 300K end axial adjusting bolt (3) to make the screw length consistent between the second 300K pull rod base (2); adjust the 300K end radial adjusting bolt (4) to make the second 300K pull rod base (2) coaxial with the first 300K pull rod base (1), and adjust the low-temperature end radial adjusting bolt (16) to make the second low-temperature end pull rod base (15) coaxial with the first low-temperature end pull rod base (14); Step two, install the second 300K pull rod base (2) on the vacuum container, and install the second low-temperature end pull rod base (15) on the low-temperature framework; Step three, rotate the 300K end radial adjusting bolt (4) and the low-temperature end radial adjusting bolt (16) counterclockwise or clockwise in sequence to make the magnet translate in a single horizontal direction, thereby adjusting the relative position of the magnet and the vacuum container in the horizontal direction; without adjusting the length of the carbon fiber pull rod, rotate the 300K end axial adjusting bolt (3) counterclockwise or clockwise in sequence to make the magnet move in the vertical direction, thereby adjusting the relative position of the magnet and the vacuum container in the vertical direction; Step four, further compress the spring (6) by rotating the 300K end axial adjusting bolt (3) counterclockwise or clockwise to change the damping stiffness of the entire magnet.

7. The method of using a single degree of freedom adjusted three-dimensional tension rod device of claim 6, wherein, In step two, when installing the second 300K pull rod base (2) on the vacuum container, install a sealing rubber ring between the second 300K pull rod base (2) and the vacuum container, and lock it with a bolt.

8. The method of using a single degree of freedom adjusted three-dimensional tension rod device of claim 6, wherein, Lock the second low-temperature end pull rod base (15) and the low-temperature framework with a bolt.

Images