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21. 发明专利

JPH0371606A SUPERCONDUCTING MAGNET DEVICE 失效
公开(公告)号：JPH0371606A
公开(公告)日：1991-03-27
申请号：JP20671589
申请日：1989-08-11
申请人： RAILWAY TECHNICAL RES INST
发明人： NEMOTO KAORU , NAKAJIMA HIROSHI
IPC分类号： H01F6/00 , B60L13/10
摘要： PURPOSE:To make it possible to remove discontinuity troubles by a method wherein momentary voltage is applied to the super-conducting body of a permanent current switch, and the attachment of a heater is unnecessitated. CONSTITUTION:A switch S1 is turned off, a switch S2 is turned on, and momentary voltage is applied to the superconducting body 4 of an on-state permanent current switch to be used for on-switching. As the self-inductance of the permanent current switch 3 is small, a current reaches the critical current simultaneously with the application of voltage, the superconducting body 4 is transferred to normal conduction, it is turned into the state of resistance and switched to an off state. Besides, voltage is added to the resistance generated on the superconducting body 4 itself. Joule heat is generated, and the permanent current switch 3 is heated up for a short period. As the specific heat of the superconducting body 4 is low at a cryogenic temperature, it easily reaches the critical temperature or higher. Accordingly, an off state can be maintained until the superconducting body is cooled down by a cryogen mixture medium to the critical temperature or lower even after instantaneous voltage becomes zero. As a result, the attachment of a heater for an off operation is unnecessitated, and a wire disconnection trouble can be removed completely.

22. 发明专利

JPH01298902A LEVITATING, GUIDING AND DRIVING DEVICE FOR GUIDED REPULSION MAGNETIC LEVITATION RAILWAY 失效
公开(公告)号：JPH01298902A
公开(公告)日：1989-12-01
申请号：JP12816188
申请日：1988-05-27
申请人： RAILWAY TECHNICAL RES INST
发明人： FUJIE NOBUHARU , NAKAJIMA HIROSHI , FUJIWARA SHUNSUKE
IPC分类号： B61B13/08 , B60L13/10
摘要： PURPOSE:To reduce a traveling resistance by null flux-connecting an upper conductor coil and a lower conductor disposed at both sides of a track passage, and null flux-connecting upper conductor coils by connecting wires. CONSTITUTION:Superconducting coils 20, 20' are vertically mounted at both sides of the truck 9 of a vehicle V. On the other hand, upper conductor coils 2, 2' and lower conductor coils 3, 3' are vertically disposed at a predetermined interval at both insides of a track passage 13 of U-shaped section. Here, the coils 2, 2' are null flux-connected to the coils 3, 3'. The coils 2, 2' are null flux-connected through connecting wires 4, 5. Thus, an electromagnetic traveling resistance of a vehicle at the time of traveling can be suppressed to a small value.

23. 发明专利

JPS6467569A VALVE GEAR 失效
公开(公告)号：JPS6467569A
公开(公告)日：1989-03-14
申请号：JP22452187
申请日：1987-09-08
申请人： RAILWAY TECHNICAL RES INST , TOSHIBA CORP
发明人： NAKAJIMA HIROSHI , HATTORI HITOSHI
IPC分类号： F25B9/06 , F25B9/00
摘要： PURPOSE: To enhance durability of a valve by making a valve port in the head wall of a cylinder and supporting a valve disc for opening/closing the valve port selectively on a valve operating member through a resilient body. CONSTITUTION: Exhaust openings 21 are made at two peripheral points in the head wall 2 of a cylinder 1 in the circumferential direction. A valve operating member 22 is interposed between the head wall 2 and a piston 14 such that it can slide in the axial direction along the inner surface of the cylinder 1. A bottomed hole 23 having larger diameter than the exhaust opening 21 is made in the valve operating member 22 oppositely to the exhaust opening 21. A presser 27 is set in the hole 23 while being fitted, to the shaft part 25 thereof, with a valve disc, i.e., a tubular seal pad 28. A coil spring 29 is interposed between the flange part 26 of the presser 27 and the bottom wall of the hole 23 applied with a cover plate 30 having a hole for projecting the seal pad 28.

24. 发明专利

JPS6313973A VALVE DEVICE 失效
公开(公告)号：JPS6313973A
公开(公告)日：1988-01-21
申请号：JP15917886
申请日：1986-07-07
申请人： RAILWAY TECHNICAL RES INST , TOSHIBA CORP
发明人： NAKAJIMA HIROSHI , HIRANO AKIRA , HATTORI HITOSHI
IPC分类号： F15B15/18 , F16K15/06 , F16K15/18 , F16K24/02
摘要： PURPOSE:To simplify a valve device, and to facilitate the manufacture by using a spiral spring as a spring for energizing a valve body. CONSTITUTION:On the outer circumferential peripheral part of a head wall 3, a cylindrical part 21 is provided on the same axis with a cylinder 1, making this an intake cylinder. Inside the cylindrical part 21 an intake valve 22 is arranged, and a disklike valve body 23 whose diameter is greater than that of an intake port 4 and a supporting shaft 24 are provided. On the head wall 3 side of the valve body 23 a seal ring 25 made of a resin is fitted. Inside the cylindrical part 21, a spring bearing 26 having helium gas passages and a ring- shaped bearing part is fitted, and to this spring bearing 26 a spiral spring 27 which always energizes the intake valve 22 is fitted. This spring 27 is formed in such a way that even when it is compressed to be shortened in its length in the axial direction, each part thereof is not brought into contact with each other. Thus, the whole structure can be significantly simplified.

25. 发明专利

JPH09243191A HERIUM LIQUEFYING DEVICE 失效
公开(公告)号：JPH09243191A
公开(公告)日：1997-09-16
申请号：JP4471996
申请日：1996-03-01
申请人： RAILWAY TECHNICAL RES INST
发明人： NAKAJIMA HIROSHI , HERAI TOSHIKI , NAGASHIMA MASARU , TOMITA MASARU
IPC分类号： F25B9/02
摘要： PROBLEM TO BE SOLVED: To attain a maximum freezing capability even under an over-loaded state such as a de-energization state by a method wherein there is provided a valve for use in keeping a pressure at an inlet side of a herium compressor. SOLUTION: This herium liquefying device 7 supplies liquid herium to a herium tank 18 for cooling a super-conductive magnet 20. There are provided a low pressure circuit 1, a herium compressor 3, a high pressure circuit 2 and a cryogenic expanding device 6. The high pressure circuit 2 and the cryogenic expansion device 6 are connected by a high pressure pipe passage L2. The cryogenic expansion device 6 and the low pressure circuit 1 are connected by a low pressure pipe passage L1. The low pressure circuit 1 is connected to a suction port 21 of a herium compressor at an inlet side of the herium compressor 3, and the high pressure circuit 2 is connected to an output side of the herium compressor 3. A second low pressure adjusting valve 13 is arranged between the low pressure circuit 1 and the suction port 21. With such an arrangement as above, either an operating efficiency or a freezing capability of the herium liquefying device can be equal to that of the normal operating state in its maximum values.

26. 发明专利

JPH06283769A SUPERCONDUCTING MAGNET REFRIGERATING SYSTEM 失效
公开(公告)号：JPH06283769A
公开(公告)日：1994-10-07
申请号：JP9218293
申请日：1993-03-26
申请人： RAILWAY TECHNICAL RES INST
发明人： NAKAJIMA HIROSHI , NAGASHIMA MASARU
IPC分类号： F25B9/02 , F25B9/00 , F25D3/10 , H01F6/04 , H01L39/04 , H01F7/22
摘要： PURPOSE:To facilitate reliquefaction subsequent to thermal overloading and miniatuarize the buffer tank in a superconducting magnet refrigerating system by temporarily storing vaporized helium in the low temperature buffer tank when a thermal load exceeds the freezer's capability. CONSTITUTION:Usually a flow control valve 13 is fully open, and the internal pressure of a low temperature buffer tank 12 is equal to the pressure of a liquid helium standing section 2. When the thermal load is increased due to excitation/demagnetization of a superconducting magnet, the valve 13 is closed to increase the internal pressure of the buffer tank, and a region for temporarily storing helium gas is thereby ensured. After the ordinary thermal load has been restored, the flow control valve 13 is opened to reliquefy the helium.

27. 发明专利

JPH0318602A VALVE SYSTEM 失效
公开(公告)号：JPH0318602A
公开(公告)日：1991-01-28
申请号：JP15387989
申请日：1989-06-16
申请人： RAILWAY TECHNICAL RES INST , TOSHIBA CORP
发明人： NAKAJIMA HIROSHI , HERAI TOSHIKI , HATTORI HITOSHI , ARAOKA KATSUMASA
IPC分类号： F01L1/00 , F01L1/46 , F01L21/00 , F25B9/06
摘要： PURPOSE:To secure positive operation of a valve system, and to improve its reliability by forming an outer surface of a stopper head projecting from a push member, so that its axial profile is a convex curve. CONSTITUTION:A valve system 23 of a valve 32 for supplying gas into a cylinder 22 is composed of a push member 26 and a coil spring 24. The maximum projecting length of the push member 26 from a piston 21 is limited by a stopper head 27. An outer surface 41 of the stopper head 27 is formed so that a profile of its axial section is a convex curve such as a spherical surface. In this way, scuffing or the like is prevented because of smooth contact of the outer surface 41 with the inner surface 42 even if the stopper head 27 is brought into contact with the inner surface 42 of a hollow part 21a in such a state that the push member 26 is offset or inclined owing to an error of the coil spring 24 or some other reasons.

28. 发明专利

JPH01291068A CONDENSING DEVICE 失效
公开(公告)号：JPH01291068A
公开(公告)日：1989-11-22
申请号：JP12238888
申请日：1988-05-19
申请人： AISIN SEIKI , RAILWAY TECHNICAL RES INST
发明人： ISHIBASHI KIYOSHI , NAKAJIMA HIROSHI
IPC分类号： F25B9/00 , F25B9/14
摘要： PURPOSE:To enable a container to be installed in separate from a freezer by a method wherein a first one-way valve capable of opening in only one direction of one opening of a second passage of a condensor is arranged in a first pie and a second one-way valve capable of being opened only in a direction toward a space of the container is arranged in a second pipe. CONSTITUTION:A coolant 23 changed into gaseous state as an item to be cooled is cooled in a former half cycle in a freezer 10 is flowed into a second passage 17 of a condensing part 17 through one-way valve 21 and then condensed with a working gas of low temperature flowing in a first passage 17a. In the latter half cycle, since a temperature of the working gas is higher than that of the former half cycle, both gaseous state and liquid phase are present in a space extending from the one-way valve 21, the second passage 17b of a condensing part 17 and the one-way valve 22, resulting in that its pressure becomes equal to a saturated vapor pressure at the temperature. Therefore, the liquid coolant 23 condensed is increased at its temperature and its pressure is also increased along a curve of saturated vapor pressure. The coolant is pushed up and returned back to a container 20 through one-way valve 22. Accordingly, it is possible to design the container in separate from the freezer.

29. 发明专利

JPS62163503A HERMETIC STRUCTURE TRUCK FOR MAGNETIC LEVITATION VEHICLE 失效
公开(公告)号：JPS62163503A
公开(公告)日：1987-07-20
申请号：JP226786
申请日：1986-01-10
申请人： RAILWAY TECHNICAL RES INST
发明人： NAKAJIMA HIROSHI , HERAI TOSHIKI
IPC分类号： B60L13/04 , B61F5/52
摘要： PURPOSE:To eliminate a tank for exclusively storing gas helium from a truck by constructing a truck frame in a hermetical seal structure. CONSTITUTION:The sectional shapes of truck side beam 1 and truck lateral beam 2 are elliptical and circular. Thus, gas helium of high pressure and large volume can be stored to reduce the weight and to improve the volume efficiency.

30. 发明专利

JP2001178112A SUPERCONDUCTING ELECTRIC MOTOR FOR VEHICLE 失效
公开(公告)号：JP2001178112A
公开(公告)日：2001-06-29
申请号：JP35135899
申请日：1999-12-10
申请人： RAILWAY TECHNICAL RES INST
发明人： NAKAJIMA HIROSHI
IPC分类号： B60L15/00 , H02K55/00
摘要： PROBLEM TO BE SOLVED: To provide a superconducting electric motor for a vehicle, which allows a large gap between a field system and an armature, drastically reducing the load under the spring of a truck, reducing the level of fluctuations of the load given to a rail, reducing the damages to the rail, at the same time, improving the comfortable ride in the vehicles. SOLUTION: The superconducting electric motor for vehicles is provided with a rotor 2 with an armature 3 provided at an axle 1 of a wheel 9, a stator 6, that is arranged corresponding to the armature 3 and has a superconducting coil 7 for a field system which is mounted on the truck, and a spring 5 that is provided in series with a bearing 4 between the stator 6 and the axle 1. By positively allowing for the relative displacement between the field system and the armature 3, a load under the shaft spring is reduced.

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