JPH03284162A - Rotor of superconductive revolving armature - Google Patents

Abstract

PURPOSE:To have an inspection and replacement of expansion elements of pipes easily and to assemble and disassemble the expansion elements in a short time by installing the expansion elements at the shaft end of a shaft installed at the end of a non-driving side and by dividing the shaft installed at the end of a non-driving side where the expansion elements are installed in an axis direction. CONSTITUTION:A shaft installed at the end of a non-driving side 9 is divided into two; a shaft at a non-shaft end side 9a and a shaft at a shaft end side 9b. The shaft 9b is connected to the shaft 9a by bolts, etc. Expansion elements 21a such as bellows are installed on pipes 19 and 20 inside a central hole of the shaft 9b. When an inspection or replacement of the expansion elements 21a of the pipes is required, it can be done easily by removing the shaft 9b from the shaft 9a.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotor for a superconducting rotating electrical machine, and more specifically, to a helium introduction and discharge system piped in the center hole of the non-drive side end shaft. The present invention relates to a rotor of a superconducting rotating electric machine in which a telescopic element is provided in the piping.

[Prior Art] Fig. 2 is a cross-sectional view schematically showing the entire rotor of a conventional superconducting rotating electrical machine. It is provided with a telescopic element. In the figure, (1) is a torque tube, (2) is a coil mounting shaft forming the center part of the torque tube (1), (3) is a superconducting field coil fixed to the coil mounting shaft (2), ( 4) is the torque tube (
1) and a room-temperature damper surrounding the coil mounting shaft (2), (5
) is a low-temperature damper installed between the room-temperature damper (4) and the coil mounting shaft (2), and (6) and (7) are installed on the outer periphery and side surface of the coil mounting shaft (2), respectively. Helium outer cylinder and helium end plate, (8) and (9) are drive side and non-drive side end shafts, (10) are bearings that support these end shafts (8) and (9), (11) ) is the slip ring for field current supply, (12) is the torque tube (1
), (13) is the side radiation shield, (14) is the vacuum section, (15) is the liquid helium reservoir, (16) is the coil mounting shaft (2). Holding rings provided at both ends, (17) a helium introduction/discharge device rotating section attached to the shaft end of the non-drive side end shaft 9), (18) a helium introduction/discharge device fixing section, (19)
) is a helium introduction provided inside the center hole of the non-drive side end shaft (9).

The ejector rotating part (17) and the liquid helium reservoir part (1
5) A helium inlet pipe (20) is formed between the helium inlet and discharge device rotating part (17) and the torque tube (1) provided inside the center hole of the shaft (9) at the end of the non-drive side.
The helium discharge pipe (21) communicates with the heat exchanger (12), which is installed in the middle of the helium inlet pipe (19) and helium discharge pipe (20) inside the torque tube (1). It is a telescopic element.

With the above configuration, the superconducting field coil (3) disposed on the coil mounting shaft (2) is cooled to an extremely low temperature to bring the electrical resistance to zero, thereby eliminating excitation loss. (3) Generate a strong magnetic field to obtain alternating current power to the stator (not shown).

In order to cool and maintain this superconducting field coil (3) at an extremely low temperature, the helium introduction and discharge device fixing section (18), the helium introduction and discharge device rotation section (17), and the helium introduction pipe (19) are used to cool and maintain the superconducting field coil (3). Liquid helium is supplied to a liquid helium container portion formed by a helium outer cylinder (6) and a helium end plate (7).

On the other hand, the interior of the rotor is kept in a high vacuum by the vacuum section (14), and the torque tube (
1) is made into a thin-walled cylinder, and a heat exchanger (12) is provided, so that liquid helium is transferred from the liquid helium reservoir (15) to the heat exchanger (12).
), the torque tube (1) is extremely heated by flowing low-temperature gaseous helium through the helium discharge pipe (20), the helium introduction and discharge device rotation part (17), and the helium introduction 7 discharge device fixed part (18). kept at a low temperature.

As described above, the most common structure is to minimize the amount of heat that enters the cryogenic part through the torque tube (1). Furthermore, in order to reduce the heat that enters due to radiation from the sides,
A side radiation shield (13) is provided.

In addition, the helium inlet pipe (19) and helium discharge pipe (20)
) is at an extremely low temperature, so by providing an expansion/contraction element (21) in each pipe inside the torque tube (1), the difference in thermal expansion from the normal temperature part is absorbed and damage to the pipes due to thermal stress is prevented.

In addition, the room temperature damper (4) and the low temperature damper (5) shield harmonic magnetic fields from the stator, protect the superconducting field coil (3), and attenuate rotor vibrations caused by disturbances in the power system. In addition to these functions, the room-temperature damper (4) also serves as a vacuum outer cylinder, and the low-temperature damper (5) serves as a radiation shield for the helium container.

[Problems to be Solved by the Invention] In the rotor of the conventional superconducting rotating electric machine as described above, the expansion/contraction element of the piping is arranged inside the non-drive side end shaft, so due to centrifugal force or thermal expansion/contraction, In the unlikely event that the extensible element of the piping deteriorates or is damaged and requires inspection or replacement, the entire non-drive side end shaft must be disassembled, which poses the problem of spending a lot of time on disassembly and reassembly. Ta.

This invention was made in order to solve the above-mentioned problems, and it is a superconducting rotating system that reduces the number of disassembly points required for inspection and replacement of extensible elements of piping, and allows disassembly and assembly to be performed in a short time. The purpose is to obtain rotors for electrical machines.

[Means for Solving the Problems] The rotor of the superconducting rotating electric machine according to the present invention has an extensible element of the piping provided at the end of the shaft on the non-drive side end, and a portion where the extensible element is provided on the opposite drive side. The end shaft can be disassembled in the axial direction.

[Function] In this invention, the extensible element of the piping is installed at the shaft end of the non-drive side end shaft, and the non-drive side end shaft where the extensible element is provided can be disassembled in the axial direction. Therefore, remove a part of the shaft end of the non-drive side end shaft and inspect and replace the telescoping element.

[Embodiment] Fig. 1 shows an embodiment of the present invention, and in the figure, the non-drive side end shaft (9) has an end shaft (9a) on the non-shaft end side and an end shaft (9a) on the shaft end side. 9b) and the end shaft (9b).
is fastened to the end shaft (9a) by bolting or the like. Inside the center hole of the end shaft (9b) is a telescopic element (
21a), for example, bellows are pipes (19) (20)
It is set in.

In addition, the same reference numerals as in FIG. 2 indicate the same or corresponding parts, and the explanation will be omitted.

With the above configuration, inspection of the expansion/contraction element (21a) of the piping,
When replacement becomes necessary, the extensible element (21a) of the piping can be replaced by removing the shaft end shaft (9b) of the non-drive end shaft (9) from the opposite end shaft (9a). inspection and replacement can be done easily.

In addition, in the embodiment 1, the non-drive side end shaft is divided in the axial direction, but the inside of the center hole of the helium introduction and discharge device rotating part (17) that can be separated from the non-drive side end shaft is A piping expansion/contraction element (2↑a) may be provided.

Further, in the above embodiment, the present invention is applied to the end shaft on the non-drive side, but the same effect can be obtained even when applied to the end shaft on the drive side.

[Effects of the Invention] As described above, according to the present invention, the extensible element of the piping is provided at the shaft end of the non-drive side end shaft, and the extensible element is provided on the non-drive side end shaft. can be divided in the axial direction, so
This has the effect of making it easier to inspect and replace the extensible elements of the piping, and allowing for quick assembly without disassembly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a rotor of a conventional superconducting rotating electric machine. (2) Coil mounting shaft, (3) Superconducting field coil, (9) ・Anti-drive side end shaft, (9a)・Anti-shaft end end shaft, (9b) ・Shaft end side End shaft, (19)... Helium inlet pipe, (20)... Helium discharge pipe, (21,
a) Telescopic elements of piping. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A superconducting rotating electric machine that is provided inside the center hole of the non-drive side end shaft coaxial with the coil installation shaft on which the superconducting field coil is attached, and that forms a helium introduction and discharge system, and is equipped with piping that can be expanded and contracted in the axial direction. In the rotor, the telescopic element of the piping is provided at the shaft end of the non-drive end shaft, and the non-drive end shaft at the location where the telescopic element is provided can be divided in the axial direction. A rotor for a superconducting rotating electric machine characterized by: