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11. 发明专利

JP2011163421A Labyrinth seal device for turbomachine 审中-公开
标题翻译：用于涡轮机的乳品密封装置
公开(公告)号：JP2011163421A
公开(公告)日：2011-08-25
申请号：JP2010026056
申请日：2010-02-09
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YAMAGUCHI KAZUYUKI , MAGARA YOHEI , YOSHIDA TOYOMI , TAKAGI YUKISHI , MURATA KENICHI , KUDO TAKESHI , ENDO AKIRA
IPC分类号： F16J15/447 , F01D11/02 , F01D25/00 , F02C7/28 , F04D29/12
摘要： PROBLEM TO BE SOLVED: To provide a labyrinth seal device for a turbomachine effectively reducing swirl flow in groove parts with simple structure to suppress unstable vibration of a rotor.
SOLUTION: A labyrinth seal 8 for the turbomachine is provided in a clearance part between the rotor 3 having a rotating impeller, and a stator 5 supporting the rotor, and includes a seal ring 10 having an outer peripheral side ring part 12 supported to the stator 5, and an inner peripheral side ring part 13 provided with a plurality of comb teeth 16 on the inner peripheral side. The labyrinth seal 8 also includes an air extraction slit 19 provided along a radial direction of the rotor and communicating with the groove parts 17 formed between the comb teeth, and with the outer peripheral side of the inner peripheral side ring part; and a projection 20 provided on the outer peripheral surface of the inner peripheral side ring part 13. The projection 20 is provided in a position substantially adjacent to the air extraction slit 19 downstream in the rotor rotating direction of the air extraction slit 19.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了提供用于涡轮机的迷宫式密封装置，有效地减少槽部分中的涡流，结构简单，可以抑制转子的不稳定振动。解决方案：用于涡轮机的迷宫式密封件8设置在具有旋转叶轮的转子3和支撑转子的定子5之间的间隙部分中，并且包括密封环10，其具有被支撑的外周侧环部分12 以及在内周侧设置有多个梳齿16的内周侧环部13。迷宫式密封件8还包括沿着转子的径向设置的空气抽取狭缝19，与形成在梳齿之间的槽部17以及内周侧环部的外周侧连通。以及设置在内周侧环部13的外周面上的突起20.突起20设置在与抽气狭缝19的转子旋转方向下游的空气抽取狭缝19基本相邻的位置。
版权所有（C）2011，JPO＆INPIT

12. 发明专利

JP2008128275A Labyrinth seal 有权
标题翻译： LABYRINTH SEAL
公开(公告)号：JP2008128275A
公开(公告)日：2008-06-05
申请号：JP2006310594
申请日：2006-11-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YAMAGUCHI KAZUYUKI , KISHIBE TADAHARU , NAKANO SUSUMU , INOUE TOMOAKI , MAGARA YOHEI , YOSHIDA TOYOMI , TAKAGI YUKISHI , MURATA KENICHI , KUDO TAKESHI
IPC分类号： F16J15/447
摘要： PROBLEM TO BE SOLVED: To provide a labyrinth seal having simple construction for effectively avoiding a problem with unstable vibration of a rotary element while maintaining high sealing performance. SOLUTION: The labyrinth seal having a plurality of seal teeth 2 develops a sealing function as a result that a pressure-drop cavity 3 formed along the outer periphery of the rotary element by the seal teeth generates pressure loss in a leak flow LS from a seal part to suppress the leak flow. Static pressure generation parts 5 are provided on the side faces and the end faces of the seal teeth. The static pressure generation parts generate local static pressure in a rotational flow RS occurring in the leak flow to suppress the rotational flow. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有简单结构的迷宫式密封件，用于有效地避免旋转元件的不稳定振动的问题，同时保持高的密封性能。解决方案：具有多个密封齿2的迷宫式密封件形成密封功能，结果是通过密封齿沿着旋转元件的外周形成的压降腔3在泄漏流LS中产生压力损失从密封部分抑制泄漏流量。静压产生部件5设置在密封齿的侧面和端面上。静压产生部件在泄漏流中产生的旋转流量RS中产生局部静压，以抑制旋转流动。版权所有（C）2008，JPO＆INPIT

13. 发明专利

FR2644018B1 未知
公开(公告)号：FR2644018B1
公开(公告)日：1992-09-18
申请号：FR9002430
申请日：1990-02-27
申请人： HITACHI LTD
发明人： MATSUSHITA OSAMI , TAKAGI MICHIYUKI , YOSHIDA TOYOMI , TAKAHASHI NAOHIKO , SAITOH IKUHIRO
IPC分类号： F16C39/06 , G05B11/36 , F16C32/04 , G05D3/12 , G06F17/10 , H03H17/02 , H03H7/12 , G01H11/04
摘要： A band pass filter multiplies an input waveform with first trigonometric functions at a plurality of frequencies and then filters the products. Furthermore, with that filtering step, the products are multiplied, or their phase is changed by a predetermined value, and the results are multiplied by the inverse of the trigonometric functions. The sum of this, for all frequencies, generated a filtered output waveform. Where the input waveform has two components, the corresponding outputs can be obtained from the read and imaginary components of the output waveform. In practice the trigonometric functions are produced by sine and cosine components at each frequency. In this way a band pass filter device is formed which is suitable for use in the control system of an apparatus which must be controlled continuously, such as a control system for a rotor.

14. 发明专利

FR2644018A1 未知
公开(公告)号：FR2644018A1
公开(公告)日：1990-09-07
申请号：FR9002430
申请日：1990-02-27
申请人： HITACHI LTD
发明人： MATSUSHITA OSAMI , TAKAGI MICHIYUKI , YOSHIDA TOYOMI , TAKAHASHI NAOHIKO , SAITOH IKUHIRO
IPC分类号： F16C39/06 , G05B11/36 , F16C32/04 , G05D3/12 , G06F17/10 , H03H17/02
摘要： A band pass filter multiplies an input waveform with first trigonometric functions at a plurality of frequencies and then filters the products. Furthermore, with that filtering step, the products are multiplied, or their phase is changed by a predetermined value, and the results are multiplied by the inverse of the trigonometric functions. The sum of this, for all frequencies, generated a filtered output waveform. Where the input waveform has two components, the corresponding outputs can be obtained from the read and imaginary components of the output waveform. In practice the trigonometric functions are produced by sine and cosine components at each frequency. In this way a band pass filter device is formed which is suitable for use in the control system of an apparatus which must be controlled continuously, such as a control system for a rotor.

15. 发明专利

JPH06273254A CALCULATION OF EQUIVALENT CORRECTED WEIGHT OF ELASTIC ROTOR 失效
公开(公告)号：JPH06273254A
公开(公告)日：1994-09-30
申请号：JP5840093
申请日：1993-03-18
申请人： HITACHI LTD
发明人： YOSHIDA TOYOMI , MATSUSHITA OSAMI , TAKAGI YUKISHI
IPC分类号： F16F15/32 , F16F15/34 , F16F15/36 , G01M1/32
摘要： PURPOSE:To increase the balance effect even if the balance weight quantity is small by converting the balance weight obtained at the shaft edge part in an equivalent form by the field balance and carrying out the development to the inside of a rotor as the essential imbalance generation position. CONSTITUTION:A rotor 1 is supported by the bearing 4 such as oil bearing and magnetic bearing at the left and right parts. Further, the rotor 1 is equipped with an impeller 2, and the imbalance 3 existing on the impeller 2 requires the balance due to the field balance. The dangerous speed mode is represented by the synthesis of the rigid body mode (two pieces) and the bearing 4 is pin- restrained, and the N+2 surface balance weight for these modes is calculated on the basis of the balance weight obtained at the shaft edge part of the rotor 1 by the field balance, and these balance weights are converted into an equivalent form in the inside of the rotor 1.

16. 发明专利

JPH03213716A ROTARY SHAFT CONTROL DEVICE 失效
公开(公告)号：JPH03213716A
公开(公告)日：1991-09-19
申请号：JP610490
申请日：1990-01-17
申请人： HITACHI LTD
发明人： TAKAHASHI NAOHIKO , MATSUSHITA OSAMI , TAKAGI YUKISHI , YOSHIDA TOYOMI
IPC分类号： F16C32/04 , G05B13/04
摘要： PURPOSE:To improve the accuracy of state estimation so as to increase stability in high rotation by providing an observer, having mechanism for changing an arithmetic parameter according to the rotating speed of a rotary shaft, inside a control device. CONSTITUTION:A sensor 2 fitted at a rotor 1 detects the radial displacement and rotating speed of the rotor 1. In an observer parameter setting device 3, a parameter setting part 31 fetches an appropriate parameter from an observer parameter table 32 according to the detected rotating speed and delivers it to an observer arithmetic part 4. The state estimated amount obtained by the observer arithmetic part 4 is fed back to an electromagnetic bearing device 6 by a regulator 5. The accuracy of state estimation is thus improved, and therefore stability in high rotation can be increased.

17. 发明专利

JPH03216011A FOURIER TRANSFORMATION BAND PASS FILTER TYPE CONTROLLER 失效
公开(公告)号：JPH03216011A
公开(公告)日：1991-09-24
申请号：JP1064290
申请日：1990-01-22
申请人： HITACHI LTD
发明人： MATSUSHITA OSAMI , TAKAGI YUKISHI , YOSHIDA TOYOMI , TAKAHASHI NAOHIKO , SAITOU IKUHIRO
IPC分类号： G05B11/36 , G05D3/12 , H03H17/02
摘要： PURPOSE:To apply a vibration waveform even when it is not a periodic function by adopting the method multiplying a trigonometric function of a vibration frequency component to be extracted with an original vibration waveform. CONSTITUTION:A complex number vibration displacement Zin is multiplied respectively with trigonometric functions e and e respectively to extract forward and backward vibration components at a multiplier 1. Then a low pass filter (with control rule) 2 extracts the signal and multiplies each vibration frequency component with control rules ake and bke (k=1-N) in forward and backward directions. Then in order to restore the waveform into the vibration waveform of the original extracted vibration frequency component by a multiplier 3, the functions e and e are multiplied respectively to the forward and backward component to reproduce the vibration waveform for control at each vibration frequency component and they are collected to obtain an output signal Zout. Thus, the vibration waveform is applied even when it is not a periodic function.

18. 发明专利

JPH02227701A FOURIER TRANSFORMATION BAND PASS FILTER TYPE CONTROLLER 失效
公开(公告)号：JPH02227701A
公开(公告)日：1990-09-10
申请号：JP4652989
申请日：1989-03-01
申请人： HITACHI LTD
发明人： MATSUSHITA OSAMI , TAKAGI MICHIYUKI , YOSHIDA TOYOMI , TAKAHASHI NAOHIKO , SAITOU IKUHIRO
IPC分类号： F16C32/04 , F16C39/06 , G05B11/36 , G05D3/12 , G06F17/10 , H03H17/02
摘要： PURPOSE:To attain the application of a vibrating waveform even if it is not equal to a periodic product by obtaining the average value of the vibrating frequency component to be extracted by multiplying a trigonometrical function of the vibrating frequency component by an original vibrating waveform. CONSTITUTION:The complex number vibrating frequency of the double channel input is defined as Zin(t)=xin(t)+jyin(t), where (j) shows an imaginary unit. For the Fourier transformation, Zin(t)=A0+SIGMAKN=i(Akexp(jomegakt)+Bkexp(-jomegakt) is satisfied. The original oscillation frequency is multiplied by the trigonometri cal functions exp(-jomegakt) and exp(+jomegakt) via a multiplier I to obtain the average values Ak and Bk respectively. Thus a band pass filter BPF is obtained to extract A0, Ak, B0 and Bk (k = 1 - N). Then akexp(jthetak) and bkexp(-jdeltak) of the control side are multiplied by each vibrating frequency via a low pass filter LPF 2 with control. A vibrating waveform for control is produced by multiplying exp(jomegakt) and exp(-jomegakt) via a multiplier II. These vibrating waveforms are gathered for acquisition of an output signal Zout.

19. 发明专利

JPH02244205A FOURIER TRANSFORMING DEVICE AND FOURIER TRANSFORMING METHOD 失效
公开(公告)号：JPH02244205A
公开(公告)日：1990-09-28
申请号：JP6373489
申请日：1989-03-17
申请人： HITACHI LTD
发明人： YOSHIDA TOYOMI , MATSUSHITA OSAMI
IPC分类号： G05B21/02 , G06F17/14
摘要： PURPOSE:To attain the real time analysis of a waveform by multiplying the new vibration waveform value by the small weight value according to the stored old mean vibration waveform and defining the new mean vibration waveform value with addition of the new vibration waveform when the new vibration waveform value is stored in a mean vibration waveform value area at the corresponding time for each sampling cycle. CONSTITUTION:The newly sampled vibration waveform value is stored in a memory of the corresponding order with the time mean addition of the memory. Then N pieces of new complex amplitude value Ck' are obtained via an equation 1 in a range covering K = 0 through N - 1 for each sampling of a vibration waveform based on the old complex amplitude value Ch already obtained as well as the difference between the new mean vibration waveform value -Xin and the old mean vibration waveform value -Xout so far stored. Then these values Ck' are updated. Thus it is possible to obtain a high speed controller which is immune to the noises and errors and can extremely shorten the calculating time.

20. 发明专利

JPH07270227A FLUID/STRUCTURE COMPOUND VIBRATION ANALYSIS METHOD 失效
公开(公告)号：JPH07270227A
公开(公告)日：1995-10-20
申请号：JP6242494
申请日：1994-03-31
申请人： HITACHI LTD
发明人： ISHII HIROSHI , KASAHARA MASAYUKI , YOSHIDA TOYOMI
IPC分类号： G01H13/00 , G01H17/00
摘要： PURPOSE:To evaluate both additional attenuation and additional mass of fluid even for a complicated structure such as a fluid machine by providing namely an input device, a governing equation operator, a modal operator, a memory and a convergence judgment device. CONSTITUTION:A convergence judgment device 5 compares a new natural frequency and an old frequency stored in a memory 4, judges whether or not the difference is below a set value and directs whether or not to continue the operation. When the device 5 judges no convergence, a series of operation is repeated using a modal additional mass/attenuation device 6, a new governing equation producer 7, a modal operator 3 and a memory 4. When the device 5 judges the convergence, the modal mass and the modal attenuation obtained eventually by an output device 8 are output. With this device, only necessary mode is attended and so application to a structure with large dimensions is possible. Also, the calculation time is shortened and both of the additional mass and the additional attenuation during the compound vibration of fluid in a complicated structure and the structure can be predicted.

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