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1. 发明专利

JPH0568179B2 失效
公开(公告)号：JPH0568179B2
公开(公告)日：1993-09-28
申请号：JP14217987
申请日：1987-06-09
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： SHIRATA SHINSAKU , FURUKAWA YOSHIO , TOSHIMA HISASHI , NIWA SADAHIKO , YASAKA YASUHIRO , NAGURA OSAMU
IPC分类号： H02K3/51

2. 发明专利

JPS63310342A ROTOR OF ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JPS63310342A
公开(公告)日：1988-12-19
申请号：JP14217987
申请日：1987-06-09
申请人： HITACHI LTD
发明人： SHIRATA SHINSAKU , FURUKAWA YOSHIO , TOSHIMA HISASHI , NIWA SADAHIKO , YASAKA YASUHIRO , NAGURA OSAMU
IPC分类号： H02K3/51
摘要： PURPOSE:To reduce the deformation amount at the edge of a coil, by arranging a cylindrical coil step on the inside circumference of coil and by separating an annular ring radially which is arranged on the inside circumference of this coil step. CONSTITUTION:A rotor core 2 arranged around a rotating shaft 1 is secured with core caps 8 and 9. The rotor core 2 is then coupled to the inside circumference of the under surface of a cylindrical coil step 4 by shrinkage fitting on the outside circumference of the quartered segment of a core cap 9. The inside circumference of the core cap 9 is brought into contact with the outside circumference of the core cap 8 and is coupled each other with axially anchoring projection and recession. On the outside circumference of this coil step 4 a rotor coil 3 is arranged along with insulations 5, 7 and 12 and secured with a binding wire or a cylindrical coil supporting member 6 so as to give compressive displacement to the edge of the coil. The deformation amount at the edge of coil will thereby be reduced.

3. 发明专利

JPS6362176A COLLECTOR OF ROTARY MACHINE 失效
公开(公告)号：JPS6362176A
公开(公告)日：1988-03-18
申请号：JP20370086
申请日：1986-09-01
申请人： HITACHI LTD
发明人： SHIRATA SHINSAKU , ISHIDA ISAO , NAKAMORI HISASHI
IPC分类号： H01R39/08

4. 发明专利

JPS58103845A VIBRATION PREVENTING DEVICE FOR ROTARY ELECTIC MACHINE 失效
公开(公告)号：JPS58103845A
公开(公告)日：1983-06-21
申请号：JP19862881
申请日：1981-12-11
申请人： HITACHI LTD
发明人： SHIRATA SHINSAKU , KOTANINO HISASHI
IPC分类号： H02K11/00 , H02K5/24
摘要： PURPOSE:To stabilize the vibration preventing characteristic by forming a hydraulic unit at a connecting member between a bearing bracket and a base, detecting the displacement of the connecting member or a spring member, thereby operating the hydraulic unit and maintaining a load which is applied to the spring member constant. CONSTITUTION:A stay (a connecting member) 3 and a spring 6 are provided between the bearing bracket and a base 9 of a rotary electric machine, a hydraulic unit which has a piston 15 and a cylinder 16 is provided between the stay 3 and the spring 6, and a displacement detector 13 is provided at the stay 3 or the spring 6. The displacement of the spring 6 is detected, a hydraulic pump is operated by a cntroller 14, oil is fed to one side of the cylinder 16 through pipes 17, 18, thereby controlling so that loads which are applied to the spring 6 become substantially constant. In this manner, the thermal elongation of the stay 3 due to the temperature rise can be regulated, thereby preventing excessive compression force from being applied to the spring 6.

5. 发明专利

JP2000333414A ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JP2000333414A
公开(公告)日：2000-11-30
申请号：JP2000134195
申请日：2000-04-28
申请人： HITACHI LTD
发明人： SENBA AKIOMI , SONOBE TADASHI , WATANABE TAKASHI , YAGI YASUOMI , SATO JUNJI , SHIRATA SHINSAKU , MORI HIDEAKI , TSUJI EIJI , HATTORI KENICHI , ISHIHARA ATSUSHI
IPC分类号： H02K9/08 , H02K9/06
摘要： PROBLEM TO BE SOLVED: To prevent increase of the stroke the thermal oscillation of a rotor by furthermore cooling by a subcooler, a part of a cooling medium cooled by a main cooler. SOLUTION: In this turbine generator, a cooling medium cooled by a main cooler 12a circulates toward the intake side of a fan 10, cooling a ventilation flue 26 by the rotation of the fan 10, and it is branched on the exhaust side into a ventilation flue 28 side and on a ventilation flue 29 side. The cooling medium branched to the ventilation flue 29 side circulates toward the main cooler 12a, and the cooling medium branched to the ventilation flue 28 side circulates toward a ventilation flue 33 side, is cooled by a subcooler 13a in the middle, joins to a cooling medium which flows from the ventilation flue 29 side, and circulates toward the main cooler 12a. Furthermore, the cooling medium cooled by a main cooler 12b also circulates symmetrically. Consequently, it is possible to level the axial temperature increase distribution of an air gap 5, comprising the ventilation flue 29 and a ventilation flue 32, and to suppress increase in the stroke of thermal oscillation of the rotor caused by uneven axial heat elongation of the rotor.

6. 发明专利

JPH05161288A ROTOR OF ROTATING MACHINE 失效
公开(公告)号：JPH05161288A
公开(公告)日：1993-06-25
申请号：JP14920692
申请日：1992-06-09
申请人： HITACHI LTD
发明人： ISHIDA ISAO , SHIRATA SHINSAKU , NAKAMURA FUMIO , NAKADA NORIO
IPC分类号： H02K1/30
摘要： PURPOSE:To provide a rotor of a rotating machine which has simplified and completed the laminating work within a short period to remarkably lower the cost thereof even though the lamination thickness of iron core is thick in a large size machine. CONSTITUTION:A cutout part 7 having a width larger than the thickness of the iron core 3 is provided in the adequate position in the axial direction of a dovetail projected in the external circumference of a spider arm 2 and a sector type iron core 3 is easily inserted into the cutout part 7 so that the projected dovetail may just easily be engaged with the recessed dovetail of the iron core 3. Therefore, the iron core may be easily laminated.

7. 发明专利

JPH04127859A ABRASION AMOUNT DETECTOR OF BRUSH 失效
公开(公告)号：JPH04127859A
公开(公告)日：1992-04-28
申请号：JP24697190
申请日：1990-09-19
申请人： HITACHI LTD
发明人： SHIRATA SHINSAKU , NASUMURA KEIJI
IPC分类号： H01R39/38 , H01R39/58 , H02K13/00
摘要： PURPOSE:To detect abrasion amount of brush, regardless of the structure of brush holder or the length of brush, by making a recess in the brush and mounting an optical fiber, responsive to the recess, on the brush holder. CONSTITUTION:A lead wire 4 of a brush 3, pressed against a collector ring 2 contained in a brush holder 1, is placed on a fixing seat 8 through an intermediate board 7 on the central hole 6 of a lead wire securing ring 5 secured to the brush body, and an optical fiber 9 is fixed to the brush holder 1 by means of fixing bolts 10. When the end of the optical fiber 6 is aligned with the central hole 6 of the lead wire securing ring 5 and the gap between the central hole 6 and the fiber 9 increases, a photoelectric switch functions in a sensor 11 connected with the optical fiber 9. When the abrasion amount of brush 3 is low and thereby the gap is small, the photoelectric switch does not function. According to the constitution, abrasion amount of brush can be detected regardless of the structure of the brush holder or the length of the brush.

8. 发明专利

JPH02294246A VENTILATING DEVICE OF VERTICAL SHAFT ELECTRIC ROTATING MACHINE 失效
公开(公告)号：JPH02294246A
公开(公告)日：1990-12-05
申请号：JP11375789
申请日：1989-05-08
申请人： HITACHI LTD
发明人： SHIRATA SHINSAKU , NAGURA OSAMU , NASUMURA KEIJI , KIKUCHI MAKOTO , ISHII WATARU , MASUKO MITSUO
IPC分类号： H02K9/04
摘要： PURPOSE:To obtain stable cooling effect by dividing upper and lower electric fans among groups scattered so as to make about equal on plane arrangement, and equalizing a cooling place of a main machine even in the event of a fault in a power circuit. CONSTITUTION:When each of upper and lower electric fans forms one group which is opposed to a rotary shaft 7, even if something is wrong with a power circuit in any group of the upper and lower electric fans, a rotor coil and a stator coil are equally capable of cooling in remaining group. When operation starting order to each group is SW1 SW4 SW2 SW3, an operation starting time difference of the upper and lower electric fans making a pair of an axial ventilating circuit is reduced to a minimum, so that the effects of the reverse can be relieved. According to the constitution, abnormal deformation by the thermal influence of the rotor and stator of a main machine does not occur, and an excessive starting current does not occur to the fans.

9. 发明专利

JPH0279752A ASSEMBLING METHOD AT SITE OF ROTOR FOR LARGE-SIZED ROTARY ELECTRIC MACHINE, HOUSING OF GENERATING STATION AND PIT 失效
公开(公告)号：JPH0279752A
公开(公告)日：1990-03-20
申请号：JP22870888
申请日：1988-09-14
申请人： HITACHI LTD
发明人： SHIRATA SHINSAKU , YASAKA YASUHIRO , NAGURA OSAMU , TSUJI EIJI , AKAGAWA HIROTAKA , SUZUKI MAKOTO
IPC分类号： E02B9/00 , H02K15/00 , H02K15/02 , H02K15/06
摘要： PURPOSE:To conduct the title assembling method efficiently and safely at low cost by dividing and performing assembly work executed while holding a rotor under an erected state and assembly work executed while sustaining the rotor under a horizontal state. CONSTITUTION:When a rotor 10 is assembled, a yoke 14 is laminated on the outer circumference of a spider 13 first under the state A in which the spider 13 having a center as a shaft is erected in a pit 1 by utilizing a crane 50. Cores 15 are laminated on the outer circumference of the yoke 14. The rotor 10 to which said operation is completed is brought down under the state B in which the rotor 10 is laid down in the pit 1 by operating the crane 50. A winding is inserted to the slot sections of the cores 15 under the state, and the terminal sections of the winding are connected. Binding stretching operation in which binding wires composed of steel wires, etc., are wound tightly on the outer circumferential sections of the winding terminal sections 17 is conducted. Brazing operation for unifying the binding wires is performed.

10. 发明专利

JPH01243835A SHORTCIRCUIT DETECTION DEVICE IN EXCITATION CIRCUIT OF ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JPH01243835A
公开(公告)日：1989-09-28
申请号：JP6956588
申请日：1988-03-25
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： YASAKA YASUHIRO , FURUKAWA YOSHIO , NAGURA OSAMU , SHIRATA SHINSAKU , KITA EIZO , NAKAGAWA HIROTO , ONO YASUTERU
IPC分类号： H02K11/00 , H02K19/36
摘要： PURPOSE:To prevent an earth detection device from being subjected to insulation breakdown and to improve reliability, by connecting a line shortcircuit detection resistance of a line shortcircuit detection device to the earth side of a limiting resistance of the earth detection device. CONSTITUTION:A line shortcircuit detection device 40 connects series circuits of a voltage dividing resistance R1 and a line shortcircuit detection resistance r1, which is a variable resistance, respectively to a three-phase circuit of an AC excitation circuit 37. These series circuits are formed into a three-phase bridge in a Y-connection. An earth side of a limiting resistance R2 is connected to the neutral point of this three-phase bridge to complete the constitution. Both terminals of the line shortcircuit detection resistance r1 and the earth detection circuit resistance r2 are introduced to a detection section 6 respectively. Since the line shortcircuit detection resistance r1 is connected to the earth side of the limiting resistance R2, no potential of an isolation amplifier of the line shortcircuit detection device 40 will be so high against the earth as before that the occurrence of shortcircuit there can be prevented.

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