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81. 发明专利

JP2000265975A GEAR PUMP, FUEL SUPPLYING DEVICE USING IT, AND GEAR MOTOR 失效
公开(公告)号：JP2000265975A
公开(公告)日：2000-09-26
申请号：JP6435599
申请日：1999-03-11
申请人： HITACHI LTD
发明人： HEIKO KENJI , NOGAMI TADAHIKO , KADOMUKAI YUZO , SADAMORI HIROYUKI , KAMETANI HIROCHIKA , TAKAHASHI YUKIO
IPC分类号： F02M59/12 , F03C2/08 , F04C2/18 , F04C11/00
摘要： PROBLEM TO BE SOLVED: To achieve miniaturization, reduction of cost and improvement of efficiency, in a gear pump having externally provided teeth to be meshed with each other to form a pump part and a driven part, a fuel supplying device, and a gear motor. SOLUTION: In a pump in which a pump part for sucking fluid from one side of meshing parts of gears 31, 32 and 32' so arranged that their teeth provided on the peripheries may be meshed and rotated in a case 21, for increasing the pressures and for discharging fluid, two pump parts are formed by meshing two driven gears 32, 32' with the common drive gear 31, and two pump parts are connected in series into a two-stage pump part.

82. 发明专利

JP2000161245A GEAR PUMP, FUEL FEEDING DEVICE USING GEAR PUMP, AND GEAR MOTOR 失效
公开(公告)号：JP2000161245A
公开(公告)日：2000-06-13
申请号：JP33880798
申请日：1998-11-30
申请人： HITACHI LTD
发明人： HEIKO KENJI , AKASAKA YOSHIMICHI , NOGAMI TADAHIKO , KADOMUKAI YUZO , TAKAHASHI YUKIO , SAITO JUNJI , KITA YASUO
IPC分类号： F02M37/04 , F02M59/12 , F02M59/44 , F04C2/08 , F04C2/18 , F04C15/00
摘要： PROBLEM TO BE SOLVED: To obtain a gear pump and a fuel feeding device which can realize a small size and a light weight, as well as can reduce the inner leakagein a simple structure, and can obtain a high efficiency and a high discharge pressure in a wide scope from a low rotation area to a high rotation area. SOLUTION: A sealed casing 37; a driving gear 31 and a driven gear 32 which suck and discharge a fluid by engaging each other in the casing 37, and have a shaft respectively; a side plate 34 to hold the gears rotatable and slidable; and a sealing member 38 to partition and seal the pressure side connecting to a suction port at the antigear side of the side plate, and the pressure side connecting to a discharge port 35; are provided. And a sealing member 38 is provided in order to make the suction port 35 part, and the periphery of a driving gear shaft 31a, into a suction port pressure area, and the periphery of a driven gear shaft 32a into a discharge port pressure area.

83. 发明专利

JPH11191349A GAS INSULATED SWITCH 失效
公开(公告)号：JPH11191349A
公开(公告)日：1999-07-13
申请号：JP28500498
申请日：1998-10-07
申请人： HITACHI LTD
发明人： TAKAYANAGI MASAAKI , HASHIMOTO HIROAKI , NOGAMI TADAHIKO , DAIMON GORO , TAKEDA YASUHIDE , ARAI KATSUTOSHI , NAKAGAWA MASANORI
IPC分类号： H01H33/42
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive gas insulated switch with a high reliability by ensuring a sealing performance, avoiding lowering insulating performance, and reducing operating energy. SOLUTION: A length of a sealing part 15 in which an operating shaft 13 passes through is S1 or more. S1 is a length corresponding to a reciprocating motion stroke of the operating shaft 13. A side load and a friction force are reduced and also entering air and foreign materials are avoided by providing a slidable shaft receiving member such as wearing 22 and a guide part 26.

84. 发明专利

JPH10314811A WIDTH COMPRESSING MACHINE 失效
公开(公告)号：JPH10314811A
公开(公告)日：1998-12-02
申请号：JP12673097
申请日：1997-05-16
申请人： HITACHI LTD
发明人： HEIKO KENJI , NOGAMI TADAHIKO , SADAMORI HIROYUKI
IPC分类号： B21B11/00 , B21B1/02 , B21B15/00
摘要： PROBLEM TO BE SOLVED: To take out the max. effect of uniforming deformation by arranging a pair of vibrating means opposing to the compressive direction, driving the vibrating means respectively at an approximately opposite phase and imparting forced vibration for repeating increase and decrease of rolling load to a material. SOLUTION: By respectively driving the vibrating means 2, 2' at an opposite phase, the forced vibration for repeating the increase and decrease of compressive load to the material is imparted. Consequently, the displacement in the middle part of the material is canceled and becomes zero. Furthermore, when vibrating frequency is taken as the primary resonance frequency in the compressive direction of the material, the strain in the middle part of the material is maximized. Consequently, plastic deformation reaches the middle part of the material and the deformation is uniformed as compared to at the time of static compression shown by a fine line. Furthermore, when the width dimension of the material is expressed by L, Young's modulus by E and the density by ρ, it is desirable to change vibrating frequency (f) at this time to (f)=(√(E/ρ))/2L'.

85. 发明专利

JPH09174115A WORKING METHOD, WORKING DEVICE, ROLLING METHOD AND ROLLING MILL 失效
公开(公告)号：JPH09174115A
公开(公告)日：1997-07-08
申请号：JP34027795
申请日：1995-12-27
申请人： HITACHI LTD
发明人： NARITA KENJIRO , YASUDA KENICHI , HIRAMA YUKIO , SATO KOJI , NOGAMI TADAHIKO , HEIKO KENJI , HORII KENJI
IPC分类号： B21B11/00 , B21B45/02
摘要： PROBLEM TO BE SOLVED: To decrease the processing resistance or the friction resistance and to realize an energy-saving processing by generating the high frequency vibration of fine amplitude only on the front face of a tool with a surface vibration exciter and processing a metal. SOLUTION: While a high frequency vibration of fine amplitude is generated on the front face of a rolling roll 2 with a surface vibration exciter 4, a steel plate 1 is rolled. The high frequency vibration excites the steel plate 1, the vibration is generated between the steel plate 1 and the rolling roll 2, and the processing resistance or the friction resistance is decreased. Therefore, the rolling load is reduced and the energy-saving processing is realized. Because the high frequency vibration of fine amplitude is generated only on the front face of the roll 2, the equipment is made compactly comparing to the excitation of the total roll 2. Because the processing resistance or the friction resistance is decreased, the steel plate of excellent quality is rolled in the excellent production efficiency. As the surface vibration exciter, an electric magnet is used, the high frequency alternating current is made to flow in the electric magnet, the front face of the roll 2 is vibrated preferably with the high frequency magnetic force generated in the electric magnet.

86. 发明专利

JPH08117803A ROLLING METHOD, ROLLING MILL AND TANDEM MILL 失效
公开(公告)号：JPH08117803A
公开(公告)日：1996-05-14
申请号：JP26698994
申请日：1994-10-31
申请人： HITACHI LTD
发明人： YASUDA KENICHI , NARITA KENJIRO , HIRAMA YUKIO , SATO KOJI , NAKAMURA ICHIRO , NOGAMI TADAHIKO , HEIKO KENJI , HORII KENJI
IPC分类号： B21B11/00 , B21B1/22 , B21B13/14
摘要： PURPOSE: To prevent the generation of abnormal vibration at the time of causing a slip in the axial direction between rolls in a rolling method, rolling mill and tandem mill. CONSTITUTION: When high-frequency starting signals Ska , Skb from a computer 63 are inputted to a high-frequency controlling valve 26, high-frequency oil pressure is generated with the high-frequency controlling valve 26 by receiving the supply of oil pressure from an oil-pressure generating source. This high-frequency oil pressure is sent to cylinders 18A, 18B, 19A, 19B for adding high-frequency vibration in the axial direction through hydraulic pipings 62A, 62B, 62C, 62D and, by elongation and contraction of these cylinders 18A, 18B, 19A, 19B for adding high-frequency vibration in the axial direction, high-frequency small vibration in the axial direction is imparted to work rolls 2, 3 through work roll chocks 22A, 22B.

87. 发明专利

JPH03219104A ROTARY VALVE 失效
公开(公告)号：JPH03219104A
公开(公告)日：1991-09-26
申请号：JP1061990
申请日：1990-01-22
申请人： HITACHI LTD
发明人： NOGAMI TADAHIKO , SHUDO KATSUHARU , NAKAMURA ICHIRO , MAENO ICHIRO , SHIMOGAMA HIRONORI
IPC分类号： F15B13/044 , F16K11/085 , F16K31/04
摘要： PURPOSE:To enhance responsiveness in reduced size and weight by a small drive force by providing cylindrical holes in one of casings at the inner circumferential face each having the same size as the outer peripheral face of a valve body and the valve body, and sleeves coaxial with the cylindrical holes and each having an outer diameter equal to an inner diameter of the hole as well as passageways separated by this sleeves in the other, and forming control orifices of the inner edge of the cylindrical holes, the outer edges of the sleeves and both ends of the passageways. CONSTITUTION:A valve body 1 is rotatably supported at the columnar slide face thereof by casings 2, 3. Cylindrical holes 4, 5 opened in the outer peripheral surface of the valve body 1 are formed, and sleeves 6, 7 each having an outer diameter equal to the inner diameter of each cylindrical hole are disposed in the valve body 1 coaxially with the holes 4, 5. Passageways 8, 9 are formed in such a manner as to be separated from each other by the sleeves 6, 7. Control ports 10, 11 are disposed in the inner diameter portions of the sleeves 6, 7, respectively; and supply and exhaust ports 12, 13, in the passageways 8, 9, respectively. Therefore, the area of the passageways inside the valve body can become sufficiently larger than those of the control orifices 10, 11 while an inertial moment becomes small with high responsiveness a reduced size and weight by a small drive force.

88. 发明专利

JPH01283489A DIRECT OPERATED TYPE ROTARY SERVO VALVE 失效
公开(公告)号：JPH01283489A
公开(公告)日：1989-11-15
申请号：JP6099789
申请日：1989-03-15
申请人： HITACHI LTD
发明人： NOGAMI TADAHIKO , NAKAMURA ICHIRO
IPC分类号： F16K31/06 , F15B13/044 , F16K31/04
摘要： PURPOSE:To attenuate a movable part without any need of angular velocity detection by containing a viscous fluid between the magnet of a rotary servo valve and a yoke. CONSTITUTION:A direct operated type rotary servo valve has a rotor 3 integrated with a valve body 2 and a magnetic circuit for turning the rotor 3. The magnetic circuit is constituted of a magnet 4 and a yoke 5. Furthermore, a space 15 to be filled with a fluid is formed between the rotor 3 and magnet 4, and the yoke 5. The space 15 is finally filled with a viscous fluid.

89. 发明专利

JPS61197805A FLUID PRESSURE SERVO VALVE 失效
公开(公告)号：JPS61197805A
公开(公告)日：1986-09-02
申请号：JP3848785
申请日：1985-02-27
申请人： HITACHI LTD
发明人： ICHIYANAGI TAKESHI , WATANABE HARUO , NOGAMI TADAHIKO
IPC分类号： F15B13/043
摘要： PURPOSE:To securely move a main valve with low power by changing fluid pressure applied to the main valve by means of a nozzle flapper and coupling the main valve with a nozzle by means of an elastic body. CONSTITUTION:A nozzle 36 is bored in a rod-shaped member 34 connected to a first oil path 42, a flapper 30 is fixed at a position, of a leaf spring 28, in opposition to the nozzle 36, and a central portion of the rod-shaped member 34 is coupled with one end of a rod 20 via a feedback spring 38. Hereby, the main valve 12 is moved by fluid pressure without directly moving the main valve 12 by means of a forcing motor, whereby the main valve 12 can securely be moved with low power an furthermore the valve can be miniaturized since there is no need to provide the core of a displacement gauge.

90. 发明专利

JPS6170177A Servo pump apparatus 失效
标题翻译：伺服泵装置
公开(公告)号：JPS6170177A
公开(公告)日：1986-04-10
申请号：JP19151384
申请日：1984-09-14
申请人： Hitachi Ltd
发明人： ICHIYANAGI TAKESHI , WATANABE HARUO , NOGAMI TADAHIKO
IPC分类号： F04B1/26
摘要： PURPOSE: To control the movement of an actuator with high response by shifting the swash plate of a variable-capacity pump with high response by driving a regulator by a force-motor-shaped servovalve.
CONSTITUTION: A swash plate 43 is shifted by a regulator 7. Said regulator 7 is driven by a force-motor-shaped servo valve 6. Said servo valve 6 has a bobbin 23 shiftable in the axial direction in yokes 20 and 22. A spool 31 is directly fixed onto the bobbin 23. The spool 31 is directly driven by allowing control current to flow in the bobbin 23. The pressurized oil is controlled by the spool 31 and drives the regulator 7.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过用力 - 马达形状的伺服阀驱动调节器，通过移动具有高响应的可变容量泵的斜盘来控制具有高响应的致动器的运动。构成：旋转斜盘43由调节器7移动。所述调节器7由力马达形状的伺服阀6驱动。所述伺服阀6具有可在轭20和22中在轴向上移位的线轴23。 31直接固定在线轴23.通过允许控制电流在线轴23中流动来直接驱动卷轴31.加压油由卷轴31控制并驱动调节器7。

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