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1. 发明专利

JPH07332283A IMPELLER FOR CENTRIFUGAL COMPRESSOR 失效
公开(公告)号：JPH07332283A
公开(公告)日：1995-12-22
申请号：JP12349394
申请日：1994-06-06
申请人： HITACHI LTD
发明人： ORIGASA HIDEAKI
IPC分类号： F04D17/08 , F04D29/44
摘要： PURPOSE:To reduce disc friction loss in an impeller by providing a guide vane for suppressing percolation by generating flow retrorse to percolation, on the outside of an impeller main plate. CONSTITUTION:When gas leakage flow 7 from a following stage impeller inlet passage 6 passes between an impeller main plate 2 and a static passage 4, friction to the impeller main plate 2 is generated so as to generate disc friction loss. Since the gas leakage flow 7 is leakage flow from the following stage impeller inlet passage 6, the velocity component of leakage flow is only a radial velocity component. Since gas flows in a place where an impeller 1 is rotated, large friction is generated on the main plate side of the impeller 1. In order to suppress this leakage flow, a guide vane 9 is provided on the outside of the impeller main plate 2. The guide vane 9 is fitted in such a way as to have a negative angle to the rotating direction tangent of the impeller 1, and gas flow 11 inward from the outside is generated by the wedge effect. Leakage flow from the following stage impeller inlet side passage 6 is thereby suppressed.

2. 发明专利

JPH0614088A COMMUNICATION CONTROL PROCESSOR 失效
公开(公告)号：JPH0614088A
公开(公告)日：1994-01-21
申请号：JP16710992
申请日：1992-06-25
申请人： NIPPON TELEGRAPH & TELEPHONE , NTT SOFTWARE KK , NEC CORP , HITACHI LTD , FUJITSU LTD
发明人： YAMAGUCHI HIROSHI , TAKEUCHI AKINORI , TAMIYA CHIFUYU , HASEGAWA AKIRA , ORIGASA HIDEAKI
IPC分类号： H04L29/04 , H04L12/02 , H04L29/10
摘要： PURPOSE:To realize flexible combinations of a network address, an upper rank processing section, a lower rank processing section and a path by using each management information at the production of connection, thereby making the host processing section corresponding to the subordinate processing section dynamically. CONSTITUTION:A module selection section 100 executes the service of registering attributes of the upper rank processing section 101 and the lower rank processing section 103 and the service of deleting registered information. Furthermore, the section 100 makes correspondent between a connection terminal 1001 and a connection terminal 1003 corresponding to the upper rank processing section and the lower rank processing section respectively based on path information obtained from a resource management section 105 and the attribute of the lower rank processing section and informs the lower rank processing section 103 of a connection production request to a network address. Thus, the selection section 100 selects the lower rank section dynamically according to a connection production request from the upper rank processing section 101 and the both are connected until a connection release request is issued from the upper rank processing section 101.

3. 发明专利

JP2014043795A Surge generation preventing device and compressor incorporating the same 审中-公开
标题翻译：防爆装置和压缩机的防锈产生装置
公开(公告)号：JP2014043795A
公开(公告)日：2014-03-13
申请号：JP2012185777
申请日：2012-08-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TAWARA KOICHI , SUZUKI KITAMI , ORIGASA HIDEAKI , MIYANAGA TAKESHI
IPC分类号： F04D27/02
摘要： PROBLEM TO BE SOLVED: To provide a surge generation preventing device capable of preventing surge, and easily grasping an operating state of a compressor, and a compressor incorporating the surge generation preventing device.SOLUTION: A surge generation preventing device 10 includes polytropic head calculating means 13 acquiring information on a suction flow rate, a suction pressure Ps, a suction temperature Ts, a discharge pressure Pd and a discharge temperature Td of a compressor 1, and calculating a polytropic head value hpol, molecular weight estimating means 14 estimating a molecular weight MW' of a gas on the basis of the polytropic head value, surge determining means 18 for determining whether surge is generated or not by using a calculated value h not including the molecular weight MW' of the gas on the basis of the surge generation information from an operating point of the compressor 1, performance characteristic calculating means 15 calculating performance characteristic of the compressor 1 by using the estimated molecular weight MW', and operating state calculating means 16 calculating the performance characteristic, the operating point of the compressor and the surge generation information, to the information indicating the relationship between the suction flow rate of the gas and the polytropic head value, and outputting the same to a display unit 17.
摘要翻译：要解决的问题：提供一种能够防止浪涌并且容易掌握压缩机的运行状态的喘振产生防止装置以及包括浪涌产生防止装置的压缩机。解决方案：浪涌产生防止装置10包括多变头计算装置 13获取关于压缩机1的吸入流量，吸入压力Ps，吸入温度Ts，排出压力Pd和排出温度Td的信息，并计算多变性头部值hpol，分子量估计装置14估计分子量基于多变头值的气体的MW'，用于基于浪涌产生信息使用不包括气体的分子量MW'的计算值h来确定是否产生浪涌的浪涌判定装置18 从压缩机1的操作点，计算性能特性的性能特征计算装置15 通过使用估计分子量MW'的压缩机1和运算状态计算装置16计算表示气体的吸入流量和气体的吸入流量之间的关系的信息，该运算状态计算装置16计算压缩机的性能特征，压缩机的工作点和浪涌产生信息多角度头值，并将其输出到显示单元17。

4. 发明专利

JPH08145058A ROTOR SUPPORTING METHOD, COUPLING DEVICE, RADIAL MAGNETIC BEARING AND ROTARY TYPE FLUID MACHINERY 失效
公开(公告)号：JPH08145058A
公开(公告)日：1996-06-04
申请号：JP28668294
申请日：1994-11-21
申请人： HITACHI LTD
发明人： TAKAHASHI NAOHIKO , ORIGASA HIDEAKI
IPC分类号： F16C32/04
摘要： PURPOSE: To operate a rotor of a rotary type fluid machine even at vicinity of quaternary critical speed. CONSTITUTION: A coupling 3 in which a flange part and hub mounted a magnetic bearing sleeve 2 are integrally formed is fastened to an axis end part and the magnetic bearing sleeve 2 is rotationally supported by a radial magnetic bearing 1. Whereby, the axis end is located at a position where expanded width of oscillation mode in quaternary critical speed is increased, so that oscillation control effect is improved if it is support,ed by the magnetic bearing at this position so as to control the oscillation and operation is stabilized.

5. 发明专利

JPH06341396A CENTRIFUGAL FLUID MACHINE 失效
公开(公告)号：JPH06341396A
公开(公告)日：1994-12-13
申请号：JP13166093
申请日：1993-06-02
申请人： HITACHI LTD
发明人： ORIGASA HIDEAKI , TANAKA YOICHI
IPC分类号： F04D29/22 , F04D29/24 , F04D29/28 , F04D29/30
摘要： PURPOSE:To prevent drop of a fluid head due to growth of a boundary layer in an impeller by furnishing a groove alongside each vane on the side-plate side on the negative pressure surface of the vane. CONSTITUTION:An impeller is formed from a core plate 1, side plate, and vanes 3. Grooves 5 and 4 are furnished on the core plate side and side-plate side, respectively, of each vane 3 when the impeller rotates in the rotating direction 7. While the impeller is in rotation, the boundary layer 6 lies eccentrically to the vane rear surface, so that growth is made in the positions with grooves 4 and 5. These grooves 4, 5 can prevent decrease in the effective passage area due to growth of the boundary layer 6. Thus the drop of the head of a centrifugal type fluid machine can be prevented by a simple method.

6. 发明专利

JPH06249216A ROTARY TYPE FLUID MACHINE 失效
公开(公告)号：JPH06249216A
公开(公告)日：1994-09-06
申请号：JP3517493
申请日：1993-02-24
申请人： HITACHI LTD
发明人： ORIGASA HIDEAKI , KONNO TOYOO , TAKEDA KAZUO
IPC分类号： F16B4/00 , F16D1/02 , F16D1/04
摘要： PURPOSE:To speedily and completely release remaining stress of a rotor which has been shrinkage fitted by providing grooves subjected to injection pressure of oil and injection holes in a rotary type fluid machine having impellers installed on a shaft by shrinkage fit. CONSTITUTION:Rotors, namely, impellers 2, 3, a balance drum 4, and a sleeve 5 are installed on a shaft 1 by shrinkage fit. Holes 7a, 7b, 7c, 7d for leading oil in grooves are provided on each rotor, and installing ports of transport pipe for supplying oil from a pump are provided in the inlets of the holes 7a, 7b, 7c, 7d respectively. Oil is supplied from the holes 7a, 7b, 7c, 7d into respective grooves 6a, 6b, 6c, 6d by the pump, and oil pressure is applied. Therefore, respective inner diameters of rotors 2, 3, 4, 5 are enlarged slightly so as to release remaining stress generated by shrinkage fit. It is thus possible to suppress shaft vibration generated by deformation of the shaft by remaining stress, and also improve reliability and safety.

7. 发明专利

JPH07332287A CONTROL SYSTEM FOR CENTRIFUGAL COMPRESSOR 失效
公开(公告)号：JPH07332287A
公开(公告)日：1995-12-22
申请号：JP13012094
申请日：1994-06-13
申请人： HITACHI LTD
发明人： ORIGASA HIDEAKI
IPC分类号： F02C7/057 , F04D27/00
摘要： PURPOSE:To improve the responsiveness of the whole system after the load cutoff of a gas turbine, and prevent the lowering of discharge side pressure so as to realize constantly stable operation of the whole system regarding an operation control system for a centrifugal compressor. CONSTITUTION:A control system or a centrifugal compressor is formed of a centrifugal compressor 1, a control valve 5, an on-off valve 6, a pressure transmitter 7 for detecting the discharge pressure of the compressor so as to adjust the opening, a controller 8, a switch 10, and operating parts 9, 11.

8. 发明专利

JP2003097487A CENTRIFUGAL COMPRESSOR 审中-公开
公开(公告)号：JP2003097487A
公开(公告)日：2003-04-03
申请号：JP2001290524
申请日：2001-09-25
申请人： HITACHI LTD
发明人： ORIGASA HIDEAKI , YAMADA HIROSHI
IPC分类号： F04D29/10 , F04B49/06 , F04D17/12 , F04D29/70
摘要： PROBLEM TO BE SOLVED: To highly reliably operate a centrifugal compressor operated under high pressure. SOLUTION: In a uniaxial multistage centrifugal compressor 1, a plurality of centrifugal impellers 2, 2, etc., are installed to a rotary shaft 21. A seal device 28 is arranged at a machine-outside of all impellers for preventing operating gas flowing in the plurality of impellers from leaking outside the machine. Drain gathering in the seal device is discharged by using drain discharge devices 12, 13, and 15.

9. 发明专利

JP2002322996A METHOD OF DRIVING AND CONTROLLING CENTRIFUGAL COMPRESSOR AND APPARATUS OF DRIVING AND CONTROLLING THE SAME 失效
公开(公告)号：JP2002322996A
公开(公告)日：2002-11-08
申请号：JP2001129006
申请日：2001-04-26
申请人： HITACHI LTD
发明人： ORIGASA HIDEAKI , YAMADA HIROSHI , NOGIWA HIDETO , ITO ATSUSHI
IPC分类号： F04D27/00
摘要： PROBLEM TO BE SOLVED: To provide method of driving and controlling a centrifugal compressor which enables it to start for use in refrigerated cycle, etc., without enlarging capacity of a driving source. SOLUTION: The compressor itself 1 is started in condition throttling opening extent of a suction valve 7 which is provided on sucked side of the centrifugal compressor itself 1 and an apparatus of driving and controlling the centrifugal compressor is configured to open the suction valve 7 by an opening extent regulating means 20b after a rotational speed detected means 20a which detects rotational speed of the centrifugal compressor itself 1 detects preset rotational speed and starting of the centrifugal compressor itself is easily achieved without enlarging the capacity of the driving source 5 because a driving torque of the centrifugal compressor itself 1 is restrained by sucking throttled fluid in advance by means of the suction valve 7 and at the same time the apparatus can surely rise the fluid to predefined pressure by opening the suction valve 7 and further compressing it.

10. 发明专利

JP2001003893A DAMPING BEARING AND MULTISTAGE CENTRIFUGAL COMPRESSOR USING IT 失效
公开(公告)号：JP2001003893A
公开(公告)日：2001-01-09
申请号：JP17629799
申请日：1999-06-23
申请人： HITACHI LTD
发明人： ORIGASA HIDEAKI , KIKUCHI KATSUAKI , KOBAYASHI HIROMI , KUWANO TETSUYA , TAKEDA KAZUO
IPC分类号： F04D29/056 , F04D17/12 , F04D29/04 , F04D29/05 , F04D29/059 , F16C17/03
摘要： PROBLEM TO BE SOLVED: To improve the reliability of a multistage centrifugal compressor by facilitating the disassembly and assembly of a damping bearing used for the multistage centrifugal compressor. SOLUTION: This centrifugal compressor has a plurality of centrifugal impellers fitted to a rotating shaft 10 and supported by two radial bearings and thrust bearings. The rotating shaft 10, the centrifugal impellers and each bearing are accommodated in a casing. The radial bearing is a damping bearing and has a tilting pad type bearing 8 which is a first bearing member opposed to the rotating shaft 10, an inner holder 5, and a holder 4 which is a second bearing member 4 disposed on the outer peripheral side of the first bearing and forming a second lubricating face 33 between the first bearing member and the second bearing member 4. A clearance of the lubricating face 33 can be easily measured by attaching and detaching a side plate 7.

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