JPS59220067A - Superconductive rotor - Google Patents

Abstract

PURPOSE:To readily seal in vacuum a vacuum adiabatic unit by arranging a rubber O-ring and a metal O-ring in a slidably moving unit provided between a coupling shaft and an outer cylinder. CONSTITUTION:A rubber O-ring 25 and a metal O-ring 26 capable of being pressed are arranged axially in series through the prescribed interval on a slidably moving unit 24 provided between a coupling shaft 10 and an outer cylinder 13. In other words, a vacuum sealing member is formed of the ring 25 inserted at collapsible margin of 10-20% in an O-ring slot 27 formed in the unit 24, and the ring 26 inserted at collapsible margin of 0% into an O-ring slot 28 formed in the unit 24 through the prescribed interval to the ring 25 and capable of being pressed through a push ring 29 from the exterior.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a super-induction rotor (hereinafter referred to as a rotor), in which a vacuum insulation part is connected to the bottom of the shaft and the outer cylinder is connected to the rotor. This relates to a rotor whose vacuum is sealed by a vacuum sealing member provided between the rotor and the rotor.

[Background of the invention]

Since the rotor is a rotating Talaiostasoto, a vacuum heat insulating section is provided inside the rotor for heat insulation, and this vacuum heat insulating section is depressurized after the rotor is assembled, and measures such as sealing are performed. Liquid helium is then injected into the refrigerant tank provided in the torque tube.

A conventional example of a rotor with a rotor of 200 mm is shown in Figs. 1 and 2. Superconducting field winding (hereinafter referred to as field winding)
1 is firmly attached to the torque tube 2 and placed in the helium container wall 3 in a quadruple winding space 4, and the liquid helium 6 in the helium tank 5 is provided in the torque tube 2 for helium distribution. It is cooled by flowing through the holes 7. This liquid helium 6 is connected to the torque tube 2 by a helium supply pipe 9 from a fixed helium tank (not shown) outside the machine via a helium supply/discharge device 8 as shown by an arrow in the figure. It is sent to the helium tank 5 through the inside of the joint shaft 10.

On the other hand, the evaporated helium gas is transferred to torque tube 2 and field 4.
After a power lead (not shown) serving as a power input line to the winding 1 is cooled, the helium is discharged to the outside of the machine through a helium supply/discharge device 8. The excitation current to the field winding 1 is supplied via the slip ring 11 from an external fixed power source.

Inside such a rotor, the outside of the helium tank 5 provided in the torque tube 2 and the winding space 4 are overlapped by an outer cylinder 13 with a vacuum insulation part 12 interposed therebetween. The outer cylinder 13 is a sealed container that cuts off the vacuum insulation part 12 inside and the outside, and at the same time acts as an electromagnetic damper 7-, so a large accident torque and electromagnetic pressure act on the outer cylinder 3. . In addition, the drive machine side (load side) of this outer cylinder 13
U: Rotating shaft 1 fixed integrally with l-luctube 2
4 and a pedestal 15 with one stage and 1111 support,
The counter-driver side (counter-load (1111) is connected and fixed to the outer cylinder joint shaft 17 with bolts 16. Also, the journal bearing 18a provided on the outer cylinder joint shaft 17 and the journal bearing 181 provided on the joint shaft 10) is supported by a single L-stage bearing petescle 19, and the connection of the joint/gift 10 to the torque tube 2 is firmly fixed by the pole 1-20, and the torque between the outer cylinder joint noft 17 and the joint shaft 10 is Transmission is performed with precision using the key 21.

The torque tube 2 of the rotor configured in this way is exposed to the extremely low temperature of 4.2 as liquid helium 6 is stored in the helium tank 5 inside the torque tube 2, and contracts in the ':11 direction. do. On the other hand, the outer cylinder 13 is normally kept at room temperature, and the temperature only rises to a certain extent during small or long periods. In order to seal the vacuum insulation section 12 between the heat-shrinkable torque tube 2 and the outer cylinder 13 that hardly undergoes thermal expansion or thermal contraction, a stretchable gold F, Q bellows 22 is used as a vacuum sealing member. is used. The vacuum insulation section 12 sealed by the metal bellows 22 is depressurized and sealed by the vacuum valve 23.

By the way, these metal bellows 22IQL: Most of them are ordered by line, so they are expensive and take a long time to deliver.Not only does mounting the metal bellows require great care and precision in processing, but it is also useful when working with thin metal bellows. Just a little bit of welding spark will leave a hole and break it. Since the metal bellows 22 is a welded bellows, the total length of the welded part is very long, and the vacuum leakage and oiliness due to defects in the welded part are also very large.

[Purpose of the invention]

The present invention has been made in view of the above points, and an object of the present invention is to provide a superconducting rotor in which vacuum sealing of the vacuum insulation portion is facilitated.

[Summary of the invention]

That is, the present invention provides a vacuum sealing member that includes a rubber 01J ring and a repressible metal 01 ring that are arranged in series in the axial direction at a predetermined interval on a sliding portion provided between a joint shaft and an outer cylinder.
It is characterized by being formed with J.

[Embodiments of the invention]

The present invention will be explained below based on the illustrated embodiments. FIG. 3 shows an embodiment of the invention. Note that parts that are the same as those in the conventional system are given the same reference numerals, and therefore their explanations will be omitted. In this embodiment, the vacuum sealing member is connected to the joint shaft 10 and the outer cylinder 1.
The sliding portion 24 provided between the rubber O-ring 25 and the repressible metal O-ring 26 are arranged in series in the axial direction at a predetermined interval. By doing so, the vacuum in the vacuum heat insulating part 12 can be easily stopped, and a superconducting rotor in which the vacuum heat insulating part 12 can be easily sealed in vacuum can be obtained.

In other words, the vacuum sealing part is provided in the sliding part 24.
A rubber O-ring 25 inserted into the knob groove 27 with a crushing allowance of 1o and 20%, and this rubber. It was provided on the sliding part 24 with a predetermined spacing from the ring 25.

Insert into the ring groove 28 and press the ring 29 from the outside.
The crushing fee that was suppressed through the. Related metal 01
It was formed with J.G.26. Then, insert the metal 0 ring 26 with a crushing allowance of 0% from the outside of the gear 21 (insert the tool from the lull, and tighten the bolt 3o inserted into the push ring 29 by 1"). The crushing amount can be adjusted from 0 to 30% through the metal ring 26 and the rubber 01) ring 25. By doing this, after the rotor is assembled, the vacuum insulation part 12 is depressurized and sealed with a vacuum valve while the rotor is in a stationary state as described above.
In this case, the rubber Q IJ song 5 effectively moves by 1. Next, the rotor is rotated at a low speed of 100 Orl 1 m or less, and when liquid helium is injected into the Rio tank from the helium supply pipe through the ram supply/discharge device, the torque tube is cooled and contracts. In this case also rubber 0
A ring 25 slides against the outer cylinder 13 to prevent vacuum leakage. In this case, the metal 01) ring 26 is inserted with a crushing allowance of 0%, so there will be no scratches on its surface, and the torque tube will shrink while the temperature of the torque tube continues to drop. continues, but when cooling is complete and a predetermined amount of liquid helium has been stored, the contraction will reach full size.

Next, the rotor is raised to the rated rotation speed of 3000 to 3600rI1m for practical use, but the rubber 01J ring 25 is crushed due to the gravitational acceleration G of approximately 2000G as it rotates, making it impossible to use for a long period of time. Otherwise, there is a risk that it will deteriorate and cause a vacuum leak. Therefore, once cooling is completed and no further contraction occurs, the rotor is stopped for a short time, the tightening bolt 3o is tightened, and the push ring 29 is pushed to tighten the metal 0s/g 26 with a crushing allowance of 5 to 30 parts. Tighten. Since the metal O-ring 26 (CJ) can sufficiently withstand large gravitational acceleration G, even if the rubber O-ring 25 deteriorates due to high 1j rotation, the vacuum in the vacuum insulation part 12 is maintained and vacuum leakage is prevented. If you want to stop cooling the rotor and warm it up, stop the rotor for a short time, loosen the tightening bolt 30, and heat the rotor by setting the crushing allowance of the metal O-ring 26 to zero.

In this way, according to this embodiment, a vacuum sealing part with sufficient durability and reliability can be formed without using expensive metal bellows, and the number of ridge welds is significantly reduced. Therefore, it does not take much time to assemble it, it is resistant to shocks caused by movement during transportation, it is easy to assemble, and it has excellent reliability. Further, the volume required for obtaining these O-rings 25 and 26 can be made significantly smaller than that of metal alloy.

The metal O-link 26 may be either hollow or solid, but it is preferably hollow and has high pressure gas inserted into it. -1: The sliding part 24 is less likely to be damaged if the surface is colored with fluororesin or covered with a metal that is softer than the main body.
It is now possible to provide a certain degree of squeezing allowance even when the torque tube is contracted, and not only can the rubber O-ring 25 be banked up, but also when the l-lux tube is expanded, the metal O-ring 26 can be This is convenient because the surface of the sliding portion 24 that comes into contact with the metal O-ring 26 is less likely to be damaged even if the screws are tightened. When recooling the torque tube, replace it with a new one as necessary.

Another embodiment of the invention is shown in FIG.

In this embodiment, the surface of the push ring 29 that contacts the metal 01) ring 26 is formed with an approximately 45 degree inclination, so that when the tightening pole 30 is tightened, the metal 0 ring 26 is It was pushed upward to increase the surface pressure on the sliding surfaces of the metal O-link 26, the outer cylinder 13, and the joint shaft 10, as indicated by the arrows in the figure, to perform vacuum sealing. By doing this, when the tightening ring 1-30 is loosened to release the push ring 29 when the tube is expanded (heated), it is easier to loosen it than in the conventional case, and the waste metal is removed. It also becomes easier to replace the manufactured 09 ink 26.

〔Effect of the invention〕

As the size is small, this book is able to seal the vacuum side of the bond insulation part without using rose on the metal, so it is now possible to seal the vacuum side without using rose on the metal. Therefore, it is possible to obtain a super-inlet trochanter that facilitates vacuum sealing and facilitates vacuum side sealing of the true isolation heat insulation section.

Fig. 1 is a longitudinal sectional side view of a conventional superconducting rotor, and Fig. 2 is a longitudinal sectional side view of a vacuum sealing section of a vacuum insulation section of a conventional superconducting rotor. FIG. 3 is a vertical sectional side view of the vacuum insulation part of the vacuum insulation part of one embodiment of the superconducting rotor of the present invention, and FIG. FIG. 3 is a longitudinal sectional side view of the vacuum sealing portion of the vacuum insulation portion.

1... Super conductive field winding, 2... Torque tube, 1
0...Join/Yaft (rotating shaft on anti-negative side 1 side), 12...
・Vacuum insulation part, 13... Outer cylinder, 14... Rotating shaft (
load side), 17...Outer cylinder joint shaft (rotating shaft on the anti-load side), 24...Sliding part, 25...Rubber O-link,
26...Metal O-link, 29...Push link.

,・′−2 Agent Patent Attorney Hiroo Nagasaki−′：・、゛・１）゛・”i
':', 'i,', -! (1 other person) − No. 3/2+ No. 4

Claims (1)

[Claims] 1. A rotating shaft on the load side and an anti-load side, a torque tube supported between these rotating shafts, a superconducting field winding provided on the torque tube, and a superconducting field winding provided on the torque tube. comprising a vacuum insulation part provided on the outer periphery of the field winding, and an outer cylinder surrounding the vacuum insulation part and connected between the rotating shafts,
The rotation on the opposite load side consists of a joint shaft connected to the torque tube and an outer cylinder joint shaft connected to the outer cylinder, and the vacuum insulation part is connected to the outer cylinder and the joint shaft. In a superconducting rotor whose vacuum is sealed by a vacuum sealing member provided therebetween, the X-magnetism restraining member is attached to a sliding portion provided between the joint shaft and the outer cylinder in a predetermined manner. A superconducting rotor characterized by being formed of a rubber O-ring and a repressible metal O-ring arranged in series in the axial direction with a gap between them. 2. The rubber O-ring is configured to have a crushing distance of 10 to 30 degrees, and the metal O-ring has a crushing distance of 0 to 30 degrees.
The superconducting rotor described in Section 1. 3. The crushing allowance of the metal O-ring is 0 when the L-Luc tube expands and contracts, and t when it does not expand and contract.
Claim No. 1- which is defined as J5 to J30.
The superconducting rotor according to item 1 or 2.