JPH03236199A - Electromagnetic force-supporting collar - Google Patents

Abstract

PURPOSE:To prevent occurrence of local stress concentration or dispersion on superconducting coils by pressing the superconducting coils to the curved section of a beam duct with pressing means via pressing plates. CONSTITUTION:Superconducting saddle type coils 100, 200 are pressed to a duct 3 by pressing bolts 6 of corresponding reinforcing collars 7a, 7b of an electromagnetic force-suported collar formed with multiple cooling holes 11 via pressing plates 6. A uniform pressing force is applied, and local stress concentration or dispersion on the superconducting coils 100, 200 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic force support collar for crimping a superconducting saddle-shaped coil used in a synchrotron radiation light generating device or the like to a component of the device.

[Prior Art] For example, in a curved part of the beam duct 3 in a synchrotron radiation light generating device, superconducting saddle-shaped coils l00a and 200a are installed to cover the outer circumferential surface of the beam duct 3 from above and below, half circumferentially at a time, as shown in FIG. will be provided. The superconducting saddle coils 100a and 200a have the same structure; for example, in the superconducting saddle coil 100a, the winding core 1
It is formed by winding the cable 102 around this winding core 101 around 01°.

Such superconducting saddle-shaped coils 100a and 200a are
As shown in FIG. 4, two layers each are provided to form superconducting saddle-shaped coils 100 and 200. Superconducting saddle-shaped coil like this! 00 and 200 are sandwiched from above by semi-cylindrical reinforcing collars 1a and 1b having inner circumferential surfaces that are in close contact with the outer circumferential surfaces of superconducting saddle-shaped coils 100 and 200, respectively, and long flat reinforcing collars 1-a and Ib. Flange portions 2a and 2b provided along the cutting line in the direction are crimped to the beam duct 3 by being fastened with bolts and nuts 4. In addition, the reinforcing collars 1a and lb have their respective brim portions 2.
The bonding surfaces 111 of the superconducting saddle coils 100 and 200 are substantially aligned with the bonding surfaces +10 of the superconducting saddle coils 100 and 200, and they are fastened together.

[Problem to be Solved by the Invention] When a current is passed through the superconducting saddle coils +00 and 200 crimped to the beam duct 3 as described above, the superconducting saddle coils 100 and 200 have a voltage as shown in FIG. Electromagnetic force is generated. In addition, Fig. 5 is a diagram showing an example of calculating the electromagnetic force generated in a straight saddle type coil. Force is expressed as a vector. As can be seen from FIG. 5, when current is applied to the superconducting saddle coils +00 and 200, the junction surface
At portion 10, electromagnetic force acts strongly in the direction of the outer peripheral surface, that is, in the X-axis direction shown in the figure. The same can be said of a curved saddle-shaped coil as shown in the embodiment described later.

In this way, the electromagnetic force is applied to the superconducting saddle coils 100 and 200.
, the superconducting saddle coils +00 and 200 are deformed. If this is not prevented, stress concentration or stress dispersion will occur locally in the superconducting saddle coils 100 and 200, which will have an adverse effect on the superconducting saddle coils +00 and 200, and the cables that make up the superconducting saddle coils will move. However, the problem arises that the magnetic field being formed changes.

In order to prevent the superconducting saddle coils +00 and 200 from being deformed due to the electromagnetic force in the XM force direction, the superconducting saddle coils +00 and 200 are placed at a position offset by 90 degrees in the circumferential direction from the joining surface 110 of the superconducting saddle coils +00 and 200, as shown in FIG. The reinforcing collars 1a and 1b may be fastened together. Although it is possible to install the reinforcing collars 1a and lb in this way in the portion where the beam duct 3 extends linearly, it is not possible to manufacture such reinforcing collars in the curved portion of the beam duct 3. It is difficult to manufacture the reinforcing collar at the curved portion of the beam duct 3 because it is difficult to manufacture, and even if it is possible to manufacture it, it is very expensive.
A type is used in which two reinforcing collars are fastened at the same position in the circumferential direction as the joint surfaces 110 of 0 and 200.

Therefore, the superconducting saddle-shaped coil due to the above electromagnetic force +00
It is not possible to effectively prevent the deformation of the superconducting saddle coils 100 and 200, and as described above, there is a problem in that stress concentration, stress dispersion, etc. occur locally in the superconducting saddle coils 100 and 200.

The present invention has been made to solve these problems, and an object of the present invention is to provide an electromagnetic force support collar that does not cause local stress concentration or stress dispersion in a superconducting saddle-shaped coil.

[Means for Solving the Problems] The present invention provides an electromagnetic force support collar for crimping a superconducting coil provided in a curved portion of a beam duct onto the beam duct, the electromagnetic force support collar being provided with a superconducting coil provided in a curved portion of the beam duct, It is characterized by comprising a pressing means for pressing in the direction of the duct.

[Operation] The superconducting saddle coil is crimped to the beam duct by an electromagnetic support collar. Further, the superconducting coil is pressed toward the outer surface of the beam duct by a suppressing means provided in the electromagnetic force support collar so that the superconducting coil is uniformly pressed against the beam duct. Therefore, the suppressing means acts to compress the superconducting coil with a uniform force over the entire outer peripheral surface of the beam duct and to prevent the superconducting coil from being locally deformed when the superconducting coil is energized.

[Example] In FIG. 1 showing an example of the electromagnetic force support collar of the present invention, the same components as in FIG. 4 are denoted by the same reference numerals, and the explanation thereof will be omitted.

In the electromagnetic force support collar of the present invention, the beam duct 3 is, for example, 9
0If is used in a curved part, and FIG. 1 shows the beam duct 3 at the A-A section of such a curved part.
, which shows cross sections of superconducting saddle coils 100 and 200, etc.

As in the past, the outer circumferential surfaces of the superconducting saddle-shaped coils 100 and 200, which are provided on the outer circumferential surface of the beam duct 3 by half a circumference, are surrounded by reinforcing collars 7a and 7b, and the reinforcing collars 7
Between a, 7b and the superconducting saddle-shaped coil lOO, 200, a plurality of thin push plates 6 having, for example, a rectangular planar shape are inserted at appropriate intervals in the circumferential direction by an appropriate method. Placed. Each of these press plates 6 may be independent, or each may be a semicircular shape having a through hole 6a for transmitting liquid helium temperature, as shown in FIG. It may be a band-shaped one.

Further, the push plates 6 arranged in this way are provided in a plurality of rows along the longitudinal direction of the curved beam duct 3, but each push plate 6 is arranged in a plurality of rows along the longitudinal direction of the beam duct 3 for ease of manufacturing. It is preferable that it is not connected.

In order to press such a press plate 6, semi-cylindrical reinforcing collars 7a and 7b, which have the same shape as conventional reinforcing collars, are used.
A screw hole 8 is provided at the position where the push plate 6 is present, passing through the outer and inner circumferential surfaces of the reinforcing collars 73 and 7b. This screw hole 8 is provided with reinforcing collars 7a and 7.
A presser bolt 9 is screwed in from the outer peripheral surface of b, and the tip of this bolt 9 presses the presser plate 6.

In addition, cooling holes 11 are provided in the reinforcing collars 7a and 7b.
are arranged in multiple stages, and the reinforcing collar 7 is inserted through the cooling holes 11.
Superconducting saddle-shaped coil 1 provided inside a and 7b
00 and 200 to facilitate cooling of these superconducting saddle coils 100 and 200.

The reinforcing collars 7a and 7b provided with the presser bolts 9 in this manner are arranged in substantially the same plane as the joining surfaces 110 of the superconducting saddle coils 100 and 200, as in the conventional case.
Flange portions IOa and IOb provided on a and 7b are joined and fastened with bolt nuts 4. Reinforcement color 7
After fastening a and 7b, the presser bolt 9 is further screwed in.

By screwing in the holding bolt 9, the superconducting saddle-shaped coils 100 and 200 are pressed in the direction of the beam duct 3 via the respective holding plates 6. Therefore, rather than pressing the superconducting saddle-shaped coils 1°O and 200 to the beam duct 3 using only the reinforcing collar as in the past, the superconducting saddle-shaped coils +00 can be pressed with a more uniform force.
and 200 can be pressed into the beam duct 3.

Therefore, when a current is passed through the superconducting saddle coils 100 and 2°, deformation of the superconducting saddle coils 100 and 200 can be suppressed, and the superconducting saddle coils 100 and 2
00, local stress concentration and stress dispersion do not occur, and superconducting saddle-shaped coils 100 and 20
It is possible to prevent the cables constituting 0 from moving and prevent changes in the magnetic field.

By adjusting the screwing amount of the presser bolt 9, the pressing force of the superconducting saddle coil 100, 200 can be adjusted to a desired magnitude. Also, instead of the presser bolt 9,
Alternatively, the superconducting saddle-shaped coils 100, 200 may be pressed directly or via the pressing plate 6 by an elastic body such as a spring pressed by the holding bolt 9.

[Effects of the Invention] As detailed above, according to the present invention, the pressing means presses the superconducting coil with a uniform force over the entire outer peripheral surface of the beam duct, so that when the superconducting coil is energized, the superconducting coil is Local deformation is avoided, and no local stress concentration or stress dispersion occurs in the superconducting coil.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the electromagnetic force support collar of the present invention, Fig. 2 is a perspective view showing the shape of the push plate, and Fig. 3 is a superconducting saddle-shaped coil installed in a beam duct curved in the longitudinal direction. Figure 4 is a perspective view showing the installed state, Figure 4 is a sectional view showing the installed state of the conventional electromagnetic force support collar, and Figure 5 is a diagram showing the direction of electromagnetic force generated when current is passed through the superconducting saddle coil. , and FIG. 6 is a sectional view showing another example of a method for installing a reinforcing collar in a beam duct having a longitudinal curvature. 6... Push plate, 7a and 7b... Reinforcement collar 9...
Holder bolt, 100 and 200...Superconducting saddle type coil.

Claims (2)

[Claims] (1) An electromagnetic force support collar for crimping a superconducting coil provided at a curved portion of the beam duct onto the beam duct, the electromagnetic force support collar having a pressing means for pressing the superconducting coil in the direction of the beam duct. An electromagnetic support collar characterized by: (2) The electromagnetic force support collar according to claim 1, further comprising a presser plate provided between the pressing means and the outer surface of the superconducting coil.