JPS58119764A - Superconductive field coil unit - Google Patents

Abstract

PURPOSE:To prevent the fluctuation of members at the cryogenic temperature time by inserting wavy spacers into the gaps between the outside surface of a race track-shaped superconductive field coil and a mounting shaft and between the inside surface of the field coil and a core seat and fixing the field coil and a strain seat to the field coil mounting shaft. CONSTITUTION:A cylindrical field coil mounting shaft 2 is engaged with a rotor shaft. A superconductive field coil 3 is buried in the shaft 2 formed in a race track shape. Wave-shaped spacers 11, 12 which use elastic material are inserted into the gap 15 between the outside surface of the coil 3 and the shaft 2 and the gap 16 between the inside surface and a core seat 4, are fixed radially by covering the entire surface on the coil 3 and core seat 4 with retainers 9 through seat packing 8 made of an elastic material, and screwing and fixing bolts 10 which passes the retiners 9 and the packing 8 to the shaft 2. In this manner, even if the members are contracted at the cryogenic temperature time, the produced gaps can be buried with the spacers and packings, thereby preventing the fluctuation of the members.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a superconducting field wire wheel device mounted on a rotor shaft in a rotating field type superconducting rotating electric machine.

Some superconducting rotating electric machines have a field aS as a rotating reserve, and are constructed of superconducting wires as part of the field wire ring. In this case, the field wire ring is often shaped into a racetrack shape, which is easier to manufacture than a saddle shape. This structure will be explained based on the 1m plane.

1st I! 11 is an external perspective view of a superconducting field wire ring device attached to the rotor shaft, 2nd @ is an external perspective view of a superconducting field wire ring used in the same device, 3II is 1,000W-1 in 111th No. 4I11 is a cross-sectional view of the lumen in No. 3II. A shaft 2 is fitted into the rotor shaft 1 to attach a cylindrical field wire ring. The superconducting field wire ring 3 is made by winding superconducting wires (for example, stranded Nb and ann wires) into a racetrack shape as shown in the figure and molding them with resin impregnation. is embedded in axis 2. Then, the core height portion 4 is embedded in the inner space of the superconducting field wire ring 3, but at this time, the gap 5 between the inner surface of the superconducting field wire ring 3 and the core height portion 4 is
The outer surface and the field wire ring attachment must be machined so that the gap 6 between the shaft 2 and the shaft 2 is as small as possible. This is to prevent the superconducting field wire ring 3 from shifting in the circumferential direction or moving in the axial direction during rotation of the rotor. Also, due to centrifugal force during rotation, the superconducting field wire ring 3. The outer periphery of the core height portion 4 is wound with a bind wire 7 to prevent it from popping out. Since the superconducting field wire ring device having such a structure is exposed to extremely low temperatures during rotation, each member contracts. If the gap 16 between the inner surface of the ring 3 becomes large and the core high part 4 shakes, and the amount of distortion due to heat contraction of the mounting shaft 2 is greater than the amount of distortion due to heat contraction of the field wire ring 3, Gap 15 between the mounting shaft 2 and the outer surface of the field wire ring 3
There was a drawback that the field ring 3 became large and the field ring 3 became loose. Also, field wire ring 3. Even if the amount of strain due to heat contraction of the high core portion 4 is larger than the amount of strain due to heat contraction of the Indian wire 7, a gap is created between the high core portion 4 and the binding wire 7,
There was a drawback that rattling occurred in the radial direction.

The purpose of this invention is to eliminate the above-mentioned drawbacks and provide a superconducting field wire ring device that does not wobble even when the temperature is extremely low and heat shrinks in each member, and in order to achieve this purpose. The structure of the superconducting field ring device was as follows. In other words, the outer surface of the racetrack-shaped superconducting field wire ring and the field wire ring are attached by inserting a wavy spacer into the gap between the shaft and the inner surface of the field ring and the core height. The superconducting field wire ring and the gold seat were fixed to the shaft from the outer circumferential direction.

Examples of this invention are described below! The explanation will be based on Figures 1 to 8. First, the gap 15 between the outer surface of the superconducting field wire ring 3 and the mounting shaft 2 and the gap 16 between the inner surface and the core height 4 were made larger than those in conventional devices, and elastic material was used for these gaps 15 and 16. Wave-shaped spacers 11 and 12 are inserted. Furthermore, the fixation in the radial direction is achieved by fixing the field wire ring 3 as shown in the cross-sectional view of FIG. A presser foot 9 is attached to the entire surface of the core high part 4 through a sheet packing 8 made of an elastic material.
Cover with presser foot 9. Pol that penetrates sheet packing 8)
In 10, the installation is done by screwing and fixing to the shaft 2.0 According to the structure described above, even if each member contracts due to extremely low temperatures, the spacer and sheet packing will fill in the gaps, so there will be no wobbling. no longer occurs.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a superconducting field wire ring device attached to the rotor shaft, Fig. 2 is an external perspective view of a superconducting field wire ring used in the same device, and Fig. 3 is a plane at the 1st EIK. 4 is a cross-sectional view taken along line A-A' in FIG. 3, FIG. 5 is a plan view of a superconducting field ring device according to an embodiment of the present invention, and FIG. 6 is a diagram of a conventional device. 7 is an enlarged view of portion C in FIG. 5, and FIG. 8 is a cross-sectional view of the same device. 2: The field wire ring is attached to the shaft, 3: Superconducting field wire ring, 4: Core height, 8: Sheet packing, 9: Presser foot, 10: Bolt,
11.12: Wave-shaped spacer, 15: Gap between the outer surface of the superconducting field wire ring and the shaft where the field wire ring is attached, 16: Gap between the inner surface of the superconducting field wire ring and the core height. Male S eyes 6 Figure 7 Figure 6 ? 8 Figure b

Claims (1)

[Claims] 1) In a rotating field type superconducting rotating electrical machine, a cylindrical field wire ring fitted into the rotor shaft is attached to the shaft, and this field ** ring attachment is attached to the shaft Klll in a racetrack shape. In a superconducting field-clamping device comprising a superconducting field wire ring and a core seat portion having an inner space KM attached thereto, the outer surface of the racetrack-shaped superconducting field wire ring and The field ring is mounted by inserting a corrugated spacer into the gap with the shaft and the gap between the inner surface of the superfield ring and the core seat. A superconducting field wire ring device, characterized in that the field wire ring attachment is fixed to a shaft from an external direction. 2) The material forming the core seat II- in the superconducting field wire device set forth in claim 1 of 41 has an amount of thermal contraction that occurs at extremely low temperatures that is equal to or smaller than the amount of thermal contraction of the superconducting field wire ring. A conductive field characterized by a strip of metal.
Ring 1L 3) Permissible range of 4% In the superconducting field wire ring device described in item 1, the field wire ring and core seat are attached to the field wire ring and the core seat in order to fix the field wire ring and the core seat to the shaft. A superconducting field wire ring is characterized in that a presser foot is covered from the outer periphery via a sheet packing, and the field wire ring is attached to a shaft using a port that passes through the presser foot and the core seat. Device.