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11. 发明专利

JPH08205315A COIL ARRANGEMENT OF MAGNETICALLY LEVITATED TRANSPORTATION SYSTEM 失效
公开(公告)号：JPH08205315A
公开(公告)日：1996-08-09
申请号：JP578195
申请日：1995-01-18
申请人： RAILWAY TECHNICAL RES INST
发明人： NAKAJIMA HIROSHI
IPC分类号： H01F7/20 , B60L13/04 , B60L13/10 , H02K41/02
摘要： PURPOSE: To levitate a car magnetically for generating power, by which magnets are returned to a center, while guiding a car body and making the car body travel by arranging two coil elements so as to be oppositely faced to the magnets in the direction rectangular to the progressive direction of the car body and continuously disposing coil blocks in the progressive direction of the car body. CONSTITUTION: When a magnet 11 loaded on a car is passed on each coil block 8A and 8B, an environmental current is induced between coil elements 7a1 and 7b1 and between coil elements 7a2 and 7b2 by combining the coil blocks 8A and 8B disposed on the ground, and levitating force is generated to the magnet 11. When the place of the magnet 11 travelling while being faced to the coil blocks 8A or 8B is displaced from the position of a center in the rectangular direction to the progressive direction, displacement is corrected and force generated among the coil elements and the magnet 11 by an environmental current flowing between the coil elements 7a1 and 7a2 works as guide force.

12. 发明专利

JPH05326259A PROTECTION RESISTOR FOR SUPERCONDUCTING MAGNET WITH CIRCUIT OPENING/CLOSING FUNCTION 失效
公开(公告)号：JPH05326259A
公开(公告)日：1993-12-10
申请号：JP14681792
申请日：1992-05-14
申请人： RAILWAY TECHNICAL RES INST
发明人： KISHIKAWA AKIHIKO , NAKAJIMA HIROSHI
IPC分类号： H01C7/12 , H01C13/00 , H01F6/02 , H01F7/22
摘要： PURPOSE:To protect a superconducting coil and a permanent current switch from burning by using an arrester as a circuit opening/closing device connected to a protection resistor in series. CONSTITUTION:The contacts of an arrester are kept open at a voltage produced across a superconducting coil 1 in magnetizing or demagnetizing operation; no circuit is constituted of the superconducting coil 1, a permanent current switch 2 and protection resistor 4. The contacts are closed at up to a voltage produced across the superconducting coil 1 in quenching thereof and at the occurrence of troubles in the permanent current switch 2; a circuit is constituted of the superconducting coil 1, permanent current switch 2 and protection resistor 4. This inhibits the shunt to the protection resistor 4 in magnetizing and demagnetizing operations, eliminating problems due to shunt. It also reduces the time of magnetizing/demagnetizing operation.

13. 发明专利

JPH05137241A PROTECTIVE RESISTOR PROVIDED WITH SWITCH 失效
公开(公告)号：JPH05137241A
公开(公告)日：1993-06-01
申请号：JP32102091
申请日：1991-11-08
申请人： RAILWAY TECHNICAL RES INST
发明人： NAKAJIMA HIROSHI , KISHIKAWA AKIHIKO
IPC分类号： H01F6/00 , H01F6/02 , H02H7/00
摘要： PURPOSE:To ensure reliability of protective system by opening a protective resistor circuit based on an external signal only at the time of magnetizing or demagnetizing a superconducting coil. CONSTITUTION:When a superconducting magnet is magnetized or demagnetized, an electric contact making/breaking medium supply port 9 is previously fed with external medium such as air so that an electric contact making/breaking cylinder 8 is operated to open the electric contact 7 of a switch thus interrupting electric circuit for a protective resistor 4. Consequently, current is not shunt at all to the protective resistor 4 when the superconducting magnet is magnetized or demagnetized. Upon finish of magnetization or demagnetization, air supply to the medium supply port 9 is stopped. Consequently, the cylinder 8 is drained and the electric contact 7 of switch is automatically closed by means of a spring 10 thus establishing the electric circuit for the protective resistor 4. According to the constitution, essential protective function of superconducting magnet is ensured.

14. 发明专利

JPH0352203A SUPERCONDUCTING MAGNET 失效
公开(公告)号：JPH0352203A
公开(公告)日：1991-03-06
申请号：JP18831689
申请日：1989-07-20
申请人： RAILWAY TECHNICAL RES INST , MITSUBISHI ELECTRIC CORP , TOSHIBA CORP
发明人： NAKAJIMA HIROSHI , JIZO YOSHIHIRO , FUJIMOTO TAIJI , YAMAJI MUTSUHIKO , AZUSAWA TERUO
IPC分类号： H01F6/00
摘要： PURPOSE:To reduce eddy-current loss generated inside and to enable attainment of a superconducting magnet which can be operated stably under electromagnetically severe conditions by providing a material of small electric resistance on the surface of an inner-tank vessel. CONSTITUTION:An inner-tank vessel 2 of a superconducting magnet is made of a plate material 2a such as a stainless steel plate which is a strength member, and a material 5 of low electric resistance such as copper, aluminum or a superconducting material is provided on the whole surface of the vessel in such a manner that it is stuck integrally thereon. Accordingly, a change in a magnetic field caused by an external magnetic field, vibration or others can be shielded magnetically by the material of low electric resistance provided on the surface of the inner-tank vessel. Thereby an eddy-current loss can be reduced sharply and the superconducting magnet being operable stably even under electromagnetically severe conditions can be obtained.

15. 发明专利

JPH0312903A SUPERCONDUCTING MAGNET WITH MECHANISM OF PERIODIC DAMPING 失效
公开(公告)号：JPH0312903A
公开(公告)日：1991-01-21
申请号：JP14812989
申请日：1989-06-09
申请人： RAILWAY TECHNICAL RES INST
发明人： NAKAJIMA HIROSHI , TSUCHISHIMA HIDEO
IPC分类号： H01F6/02 , B60L13/04
摘要： PURPOSE:To suppress vibrations of a superconducting coil by joining an interval between containers of internal and external vessels with a heat insulating composite material and incorporating damping mechanisms into the place close to a fixed end of the external vessel container side of the heat insulating composite material. CONSTITUTION:Although the region of damping capacity is so large that it can not be adjusted only by a load supporting material 7, its capacity is made to work by incorporating damping mechanism 15 into an interval between internal and external vessels 2 and 3 and the most excellent spring and damping system is constructed on the whole. Then, the internal and external vessels 2 and 3 are connected by the damping mechanism 15 having further small equivalent spring and large equivalent damping constants k2 and r2 in addition to the load supporting material 7 of equivalent spring and damping constants k1 and r1. Vibrations of the internal vessel 2 and a coil part 1 in resonance points are thus reduced drastically.

16. 发明专利

JPS6321486A HEAT EXCHANGER 失效
公开(公告)号：JPS6321486A
公开(公告)日：1988-01-29
申请号：JP16293586
申请日：1986-07-12
申请人： RAILWAY TECHNICAL RES INST
发明人： NAKAJIMA HIROSHI , HERAI TOSHIKI
IPC分类号： F28D9/04
摘要： PURPOSE:To improve heat transfer efficiency and reduce the volume by winding alternately two pairs of thin plates and reticular sheets on a cylinder surface in multi-layers and bonding airtightly thin plates together at the beginning and the end of the plate in order to secure a plurality of pairs of spiral cross-sectional flow channels. CONSTITUTION:Thin plates A31 and B32, and a reticular sheets A41 and B42 are alternately spirally wound around a cylinder and they are bonded with a brazing material, etc. At a header section 1 a reticular mask section 5 is wound and solidified in one body with a soldering material, etc. In two kinds of fluids between which heat is exchanged, one enters the upper end of an inlet and outlet opening A61 and flows through the reticular sheet B42 and flows out from the upper end of the inlet and outlet opening B62. Each of the flow passages is divided by the thin plates A31 and B32, so that there is no chance that fluids get mixed together. It is possible to miniaturize the heat exchanger and improve its efficiency because the partition of the flow passage is very thin and each flow channel is divided into small channels and the distance between the flow channels can be made thereby small.

17. 发明专利

JP2002005165A HYBRID THRUST BEARING DEVICE USING SUPERCONDUCTIVE COIL 失效
公开(公告)号：JP2002005165A
公开(公告)日：2002-01-09
申请号：JP2000187201
申请日：2000-06-22
申请人： RAILWAY TECHNICAL RES INST
发明人： NAKAJIMA HIROSHI
IPC分类号： F16H33/02 , F16C32/00 , H02J15/00
摘要： PROBLEM TO BE SOLVED: To provide a hybrid thrust bearing device using a super conductive coil capable of securing a thrust bearing function due to a mechanical radial bearing and a strong electromagnetic repulsion force and supporting heavy rotor. SOLUTION: This hybrid thrust bearing device comprises a flywheel body (rotor) 4 fixed to a vertical shaft 3, a radial mechanical bearing mechanism 6 functioning as a bearing in the radial direction of the vertical shaft 3, and a thrust bearing mechanism having a first thrust bearing super conductive coil 5 fixed to a base 1 and a second thrust bearing super conductive coil 7 disposed under the rotor 4 for floating the rotor 4 with the electromagnetic repulsion force against the first thrust bearing super conductive coil 5.

18. 发明专利

JPH08111313A MAGNETIC LEVITATION MECHANISM 失效
公开(公告)号：JPH08111313A
公开(公告)日：1996-04-30
申请号：JP26841694
申请日：1994-10-06
申请人： RAILWAY TECHNICAL RES INST
发明人： NAKAJIMA HIROSHI , KAMIJIYOU HIROTAKA , IIKURA SHIGEHIRO , YOSHIOKA HIROSHI , WATANABE TAKESHI , HERAI TOSHIKI , NAGASHIMA MASARU
IPC分类号： H01F7/20 , B60L13/04
摘要： PURPOSE: To obtain a magnetic levitation mechanism in which a vehicle is levitated perfectly without touching a ground facility at all while ensuring all functions of propulsion and guide by improving the arrangement of electri cally conductive plates opposing a magnet thereby generating a levitation force effectively. CONSTITUTION: The magnetic levitation mechanism comprises a pair of rotors 3-1, 3-2 arranged in a cross-section in the advancing direction of a mobile body, and electrically conductive plates 5-1, 5-2, 5-3 arranged continuously in the moving direction of the mobile body while being split such that the center of rotation of the rotors 3-1, 3-2 are located asymmetrically in a cross-section. The mobile is thrust by the difference of magnetic drag in the longitudinal direction between the rotors 3-1, 3-2 and when the mobile body is deviated perpendicularly to the advancing direction, a force for returning the mobile back to the center is generated.

19. 发明专利

JPH0586047B2 失效
公开(公告)号：JPH0586047B2
公开(公告)日：1993-12-09
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 , H01F7/22

20. 发明专利

JPH03282162A EXPANSION ENGINE 失效
公开(公告)号：JPH03282162A
公开(公告)日：1991-12-12
申请号：JP8136790
申请日：1990-03-30
申请人： RAILWAY TECHNICAL RES INST , TOSHIBA CORP
发明人： NAKAJIMA HIROSHI , HERAI TOSHIKI , HATTORI HITOSHI , ARAOKA KATSUMASA
IPC分类号： F16J10/00 , F25B9/06
摘要： PURPOSE:To substantially reduce the wear of a piston itself by a method wherein in an engine having a cylinder and a sleeve forming a sliding surface of a seal while being installed with a relation of replacing an inner circumferential surface of an axial part of the cylinder, a diameter of a piston of area across an end part of the sleeve is formed smaller than that of another part of it. CONSTITUTION:A piston 7a is formed such that an area 31 across an end part 30 of a sleeve 14 at its axial position is formed to have a smaller diameter than that of another area over a range of l1 (provided, l1>l). That is, when a diameter of another area of the piston 7a is is a range of 30 to 40mm, a diameter of the area 31 is formed to have a small diameter of about 0.5mm reduction. An expansion engine 4a constructed as above may perform an operation similar to that of the prior art. Even if there is a slight step at an interface part between an inner surface of the first cylinder 10 and an inner surface of a sleeve 14 due to a non-coincidence between an axis of the first cylinder 10 and an axis of the sleeve 14, the piston 7a, i.e., the area 31 does not contact with this step part.

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