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1. 发明专利

JPH01238493A TROUBLE DETECTOR FOR ROTARY ELECTRIC MACHINE 失效
公开(公告)号：JPH01238493A
公开(公告)日：1989-09-22
申请号：JP6332088
申请日：1988-03-18
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： KOMORI KENSUKE , FURUKAWA YOSHIO , YASAKA YASUHIRO , NAGURA OSAMU , HARAGUCHI EIJI , NAKAGAWA HIROTO , ONO YASUTERU
IPC分类号： H02P23/00 , H02P25/10
摘要： PURPOSE:To detect a trouble without malfunction by detecting as a trouble only when the output voltage values of at least one or two phases of three phases exhibits abnormality. CONSTITUTION:The voltages of the phases of a 3-phase AC exciter 1 are output by a transformer 6, fed through an arrester 10, a smoothing circuit 11 and an A/D converter 12, and input to a discriminator 7. In order not to operate a detector at the time of normal operation such as start or stop, a trouble signal is not oscillated when the signals transmitted from the phases are all '0' or '1' (i.e., stopping and normal operating states). However, only when at least one of these signals is '0', the detector judges that a trouble occurs in the exciter 1 to generate a trouble signal.

2. 发明专利

JPH03150039A SPLIT RIM FOR VERTICAL DYNAMO-ELECTRIC MACHINE 失效
公开(公告)号：JPH03150039A
公开(公告)日：1991-06-26
申请号：JP28749089
申请日：1989-11-06
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： KOMORI KENSUKE , ISHIDA ISAO , KAYUKAWA SHIGEHIRO , KAWAI RYOICHI , NAKADA NORIO , HAGITANI YOSHIMORI
IPC分类号： H02K5/00
摘要： PURPOSE:To facilitate tightening work, in a rotor rim split into three or more sections in the axial direction, by providing a screw hole in a rim located at lower side while providing an idle hole in a rim located at upper side and then tightening the rim sections with a bolt. CONSTITUTION:An intermediate rim 8 is fixed on a lower rim 7 having a shaft at the lower end, an upper rim 6 having a shaft at the upper part is fixed onto the rim 8 and a pole 3 is fixed to the outer circumferences of the rims 6, 7, 8. A screw hole 11 is made in the upper face of the lower rim 7 and idle holes 10b, 10a are made through the intermediate rim 8 and the upper rim 6 while opposing to the screw hole 11. A bolt 9a is then inserted into the idle holes 10a, 10b in order to tighten the upper, lower and intermediate rims 6, 7, 8. A suspension screw hole 17 is made in the upper face of the bolt 9a so that a bolt heavier than 100kg may be suspended. Furthermore, a a collar 12 is arranged approximately in the center of the bolt 9a in order to prevent bending of the bolt 9a. By such arrangement, the tightening bolt 9a can be inserted from the upper side and the tightening work is facilitated.

3. 发明专利

JP2000152565A DEVICE FOR DETECTING ROTOR'S POSITION OF DYNAMO-ELECTRIC MACHINE 失效
公开(公告)号：JP2000152565A
公开(公告)日：2000-05-30
申请号：JP32166498
申请日：1998-11-12
申请人： HITACHI LTD
发明人： JULIAN BRODIE , KOMORI KENSUKE , NAGURA OSAMU , MORIMOTO HIROSHI
IPC分类号： H02K11/00
摘要： PROBLEM TO BE SOLVED: To simply perform the accurate positional detection of a rotor, by constituting the device such that it has an arithmetic logic unit which takes the logical sum of the output signals of two sensors. SOLUTION: In the case of a rotor position detector suitable for a turbine generator, recesses 1a and projections 1b are made alternately all around a rotor 1, and a two-piece set of sensors 2 composed of a sensor 2a for ON and a sensor 2b for OFF are arranged in the vicinity of the periphery. Then, the angle between the line which the connects center of the rotor 1 with the sensor 2a and the line which connects the center of the rotor 1 and the sensor 2b is equal to an electric angle which shows the phase difference of the current flowing in wincing so that they can perform high detection of rotor's position, and the sensor 2a and the sensor 2b are connected to an arithmetic logic unit 3 through a signal cable. Hereby, the accurate grasp of the absolute positional relation between the rotor and the sensor becomes needless, and the highly accurate positional detection can be performed simply without processing the rotor precisely.

4. 发明专利

JPH0450512A HEAT PIPE DEVICE 失效
公开(公告)号：JPH0450512A
公开(公告)日：1992-02-19
申请号：JP15701890
申请日：1990-06-15
申请人： HITACHI LTD
发明人： KAYUKAWA SHIGEHIRO , KOMORI KENSUKE
IPC分类号： F16C37/00 , F28D15/02
摘要： PURPOSE:To provide a bottom heat-top cool heat pipe device capable of cooling a heating body by defining an axial gap of a spiral flexible part and average radius with predetermined dimensions to reduce fluid resistance and ensure flexibility. CONSTITUTION:A heat absorbing section at the lower side of a heat pipe 4 is embedded directly in a bearing segment 1, and a vertical spiral flexible part 4c capable of relative movement of fixed parts in all directions is provided vertically between the fixed parts of the lower side heat absorbing and the upper side radiating part. The axial gap P is set to at least 1.5 times heat pipe diameter d to reduce the fluid resistance of oil flow in an oil tank 2 and the average radius R is set to at least 4 times heat pipe diameter d to ensure the flexibility. Thus, the relative repetitive displacement between the fixed parts of the lower side heat absorbing part and the upper side radiating part is absorbed by the spiral flexible part 4c, and the lower side heat absorbing part can be embedded directly in the bearing segment 1 to provide a bottom heat-top cool heat pipe device capable of cooling a heating body.

5. 发明专利

JPH04334940A HOLDING DEVICE FOR ROTOR WINDING END OF ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JPH04334940A
公开(公告)日：1992-11-24
申请号：JP10253191
申请日：1991-05-08
申请人： HITACHI LTD
发明人： KOMORI KENSUKE , KAWAI KAZUHISA
IPC分类号： H02K3/51
摘要： PURPOSE:To improve reliability of a holding device for a rotor winding end by providing a layer of a nonmagnetic metal binding wire wound in an intermediate part of a laminating direction of a binding tape in a state that a tension is previously applied. CONSTITUTION:A layer 5 of a nonmagnetic metal binding wire wound in a state a tension for generating an elongation of a reduced size or more of a peripheral length of an inner peripheral side laminated binding tape upon contracting and flowout of thermally curable resin when the tape laminated on the inner peripheral side is thermally cured, is provided in, an intermediate part of laminating direction of layers 6, 7 made of the tapes in which the resin containing highly elastic nonmetallic fiber as a main material is impregnated. Thus, the layer 6 of the tape laminated on the inner peripheral side is tightened by a sufficiently tightening pressure thereby to remove excess resin. In this manner, a holding device for a rotor winding end of a rotary electric machine, which improves reliability, can be obtained.

6. 发明专利

JPS6430920A BEARING DEVICE FOR ELECTRIC ROTARY MACHINE 失效
公开(公告)号：JPS6430920A
公开(公告)日：1989-02-01
申请号：JP18337187
申请日：1987-07-24
申请人： HITACHI LTD
发明人： KOMORI KENSUKE , ENDO MASAICHI
IPC分类号： F16C32/04 , H02K7/09
摘要： PURPOSE:To obtain self-regulation utilizing magnetic repulsive force by providing a superconductive material in a fixed side and an excitation coil in a rotor side and conducting an electric current in the excitation coil, before the superconductive material is placed in a superconducting condition, obtaining the superconducting condition thereafter reversing the excitation current. CONSTITUTION:A superconductive material 1 is arranged in a fixed side being contained in a storage tank 2, and an excitation coil 4 is arranged in a rotary part in a position opposed to the superconducting material 1 and fixed to a rotary side support 5. Here in the superconducting condition of the superconductive material 1 with a rotor in stopping, exciting the excitation coil 4 by DC power thereafter placing the superconductive material 1 in the superconducting condition, after the superconducting material 1 is placed in the superconducting condition, an electric current in the excitation coil 4 is reversed in its direction. In this way, the superconducting material 1 allows an electric current to flow, and its magnetic flux causes magnetic repulsive force to be generated between the rotor and a fixed part. Accordingly, a bearing device with self-regulation can be obtained.

7. 发明专利

JPH10304621A VALVE HYDRAULIC TURBINE GENERATOR 失效
公开(公告)号：JPH10304621A
公开(公告)日：1998-11-13
申请号：JP10858397
申请日：1997-04-25
申请人： HITACHI LTD
发明人： SUZUKI HIROYUKI , JULIAN BRODIE , KOMORI KENSUKE , NAGURA OSAMU , ONISHI AKIRA
IPC分类号： H02K9/00
摘要： PROBLEM TO BE SOLVED: To conduct heat exchange with high efficiency without constituting a complicated structure, even for a small heat transfer area by forming an annular water channel for circulating cooling water out of a thin outer surface plate and a thick inner surface plate. SOLUTION: An inner surface plate 7 is formed as thick as a reinforcing member, and a circulating water channel 4 is formed between the inner surface plate 7 and an outer surface plate 6 to make both the surface plates 6, 7 have individual functions, thereby forming the outer surface plate 6 thin. By fitting a water pump on the outlet side of the circulating water channel 4 which runs along the inner surface of this valve hydraulic turbine generator 1, hydraulic pressure from its inside is almost negligible at the time of normal operation. During the running of the valve hydraulic turbine generator 1, hydraulic pressure is always applied to the thin outer surface plate 6 and balanced with the pressure from the inside. Therefore, there is no need for conducting special reinforcing. Welding the outer surface plate 6 of the valve hydraulic turbine generator 1 can also be applied only to its outer periphery. It is thus possible to conduct heat exchange effectively in a small surface area, without complicating piping layouts.

8. 发明专利

JPH1047873A HEAT EXCHANGER 失效
公开(公告)号：JPH1047873A
公开(公告)日：1998-02-20
申请号：JP20342796
申请日：1996-08-01
申请人： HITACHI LTD , HITACHI ENG SERVICE
发明人： KAWADA SEIJI , KOMORI KENSUKE , HAKOZAKI KOICHI
IPC分类号： F28D15/02 , B21D53/06
摘要： PROBLEM TO BE SOLVED: To obtain a heat exchanger having a simple structure and being excellent in a heat transfer effect by a construction wherein a large number of long metal plates of small thickness formed of a large number of lines of thin heat pipes are stuck on the outer surface of a metal tube through which one fluid flows, while a large number of metal fins are provided on the plates from the other end thereof and arranged in a passage of the other fluid. SOLUTION: Heat transport strips 5 are long metal plates of small thickness which are formed of a large number of lines of thin heat pipes made of a metal of high thermal conductivity, and a large number of metal fins 6 are fitted to the parts of the strips to be incorporated in a heat exchange body 2. The other end side of each heat transport strip 5 is connected to the outer surface of a metal tube 1 in such a manner that the thermal resistance thereof is made very small. A large number of heat transfer units 1 thus prepared are arranged and fixed inside the heat exchange body 2, while the other end sides thereof are stuck to be laid closely on the outer surface of the metal tube 1 in such a manner that they do not overlap each other. According to this constitution, a simple structure having a single or small number of heat transfer tubes is obtained and a heat exchanger excellent in a heat transfer effect can be constructed.

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