专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明专利

JPS5635835A BALANCING METHOD OF HOLLOW SHAFT 失效
公开(公告)号：JPS5635835A
公开(公告)日：1981-04-08
申请号：JP11040379
申请日：1979-08-31
申请人： HITACHI LTD
发明人： KIKUCHI KATSUAKI , KOBAYASHI TOKIMINE , MATSUSHITA OSAMI
IPC分类号： F16F15/32
摘要： PURPOSE:To distribute a sealed material to the inner surface of a hollow cylinder in such a manner as to obtain an equal inside radius and correct the unbalance of a hollow shaft, by sealing a liquid-state material in the hollow part of the hollow cylinder and making a rotating motion around the central axis of outer sides of the hollow shaft. CONSTITUTION:In the hollow part of a hollow cylinder 5 with an unequal thickness, a liquid-state material 12 having a character of being solidified with the lapse of time is sealed and then end plates 6, 7 are replaced to the former condition to make a rotating motion about the central axis of outer sides. During the rotating motion, the inside of the liquid-state material 12 distributed to the inner surface of the hollow cylinder 5 tends to be balanced by a same centrifugal force, resulting in the production of an actual circle with the central axis of rotating motion as a center. In this way, an uneven thickness of the hollow cylinder 5 can be equalized by the liquid-state material 12, and this causes a same result as that the hollow cylinder is machined in a good accuracy with its thickness constant in any place, and a vibration is not caused in the hollow cylinder even if rotated in such a condition as described.

42. 发明专利

JPS54147882A Abnormality occurrence detecting method of rotating machine using acoustic signals 失效
标题翻译：使用声学信号的旋转机异常检测方法
公开(公告)号：JPS54147882A
公开(公告)日：1979-11-19
申请号：JP5557578
申请日：1978-05-12
申请人： Hitachi Ltd
发明人： MATSUSHITA OSAMI , FURUDONO MASUO , SATOU MOTOHIRO , KIKUCHI KATSUAKI , HIOKI SUSUMU
IPC分类号： G01M13/04 , G01H3/00 , G01H17/00 , G01M13/00 , G01M99/00 , G01N29/12
摘要： PURPOSE: To readily detect the position, time, frequency, etc. of the abnormality occurrence of a revolving shaft by subjecting the revolution pulses and the acoustic signals from both ends of a revolving shaft to specified processing.
CONSTITUTION: When the time difference of the acoustic signal waveforms from the acoustic sensors 9, 9' at both end of a revolving shaft is detected with a time difference measuring instrument 14 and is subjected to division by the acoustic propagation speed in the shaft 6 in a divider 15, the acoustic generating position with the center of the shaft 6 as a reference is determined. On the other hand, the circuit pulse signal which a revolution pulse detector 13 generates at each rotation of the shaft 6 and the acoustic signal of the sensor 9 are applied to a histogram processing means 16, where the histogram of the rotating angle-acoustic generating frequency waveforms synchronized to the revolution pulses is made. If this histogram is subjected to delay correction according to the generating position mean value signal from the means 17 by a time delay means 20, it becomes the histogram of the acoustic generating position. Hence, the signal superposing the AC component corresponding to the histogram on the DC component corresponding to the acoustic generating position is generated from an adder, whereby the abnormality of the rotating machaine is readily and accurately detected.
COPYRIGHT: (C)1979,JPO&Japio
摘要翻译：目的：通过对来自旋转轴的两端的旋转脉冲和声音信号进行规定的处理，容易地检测回转轴的异常发生的位置，时间，频率等。构成：当用时差测量仪14检测来自旋转轴两端的声传感器9,9'的声信号波形的时间差，并通过轴6中的声传播速度进行分频时分离器15，以轴6的中心为基准的声发生位置被确定。另一方面，旋转脉冲检测器13在轴6的每个旋转处产生的电路脉冲信号和传感器9的声学信号被施加到直方图处理装置16，其中旋转角度声产生的直方图进行与旋转脉冲同步的频率波形。如果该直方图根据来自装置17的时间延迟装置20的生成位置平均值信号进行延迟校正，则其变为声产生位置的直方图。因此，从加法器产生与对应于声发生位置的直流分量对应的直方图对应的交流分量的信号，从而容易且精确地检测出旋转机械手的异常。

43. 发明专利

JPS5121024A 失效
公开(公告)号：JPS5121024A
公开(公告)日：1976-02-19
申请号：JP9328874
申请日：1974-08-16
申请人： HITACHI LTD
发明人： WATANABE TOMIJI , TAKAHASHI KAZUMI , MATSUSHITA OSAMI , SUNOBE KAZUHIRO
IPC分类号： F02M55/02 , F02M63/00

44. 发明专利

JP2002333021A MAGNETIC BEARING CONTROL METHOD AND DEVICE 审中-公开
公开(公告)号：JP2002333021A
公开(公告)日：2002-11-22
申请号：JP2002135077
申请日：2002-05-10
申请人： HITACHI LTD
发明人： MATSUSHITA OSAMI , YONEYAMA MITSUO , TAKAHASHI NAOHIKO , FUKUSHIMA YASUO , HIROSHIMA MINORU , KANEKI TADASHI , ABE YOSHIAKI , SAKANASHI TAKAFUMI
IPC分类号： F16C32/04
摘要： PROBLEM TO BE SOLVED: To control the rotation of a rotor while suppressing vibration and reducing a driving current during controlling a magnetic bearing. SOLUTION: The magnetic bearing is controlled in proper combination of ABS control, N cross control, N straight control and FF control as well as PID control. In this case, a table for a rotating number and each planned control input is provided which is managed by a computer to input control corresponding to the rotating number.

45. 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.

46. 发明专利

JPH0567808B2 失效
公开(公告)号：JPH0567808B2
公开(公告)日：1993-09-27
申请号：JP22414583
申请日：1983-11-30
申请人： HITACHI LTD
发明人： MORI HIDETOMO , MATSUSHITA OSAMI , MATSUBARA KATSUMI , IDA DOSHU , SASAKI SHIGERU
IPC分类号： F16C35/077 , F01C21/02 , F04C29/00 , F04D29/056 , F04D29/059 , F16C27/00 , F16C27/04

47. 发明专利

JPH05133382A VERTICAL SHAFT PUMP 失效
公开(公告)号：JPH05133382A
公开(公告)日：1993-05-28
申请号：JP29420691
申请日：1991-11-11
申请人： HITACHI LTD
发明人： TAKADA KUNIO , MATSUSHITA OSAMI , MATSUI SHIRO , ONO SHIGEYOSHI
IPC分类号： F04D13/00 , F04D15/00
摘要： PURPOSE:To provide a vertical shaft pump wherein reliability of preceding standby operation is improved by suppressing unbalance due to an inflow of air in a pump of performing gas/liquid two-phase operation to reduce vibration by fluid vibratory exciting force. CONSTITUTION:In a vertical shaft pump in which a pump shaft 12 is arranged in an axial center direction of a lifting pipe to provide a suction bellmouth 4 in the suction side of an impeller 1 and a suction hole 9 in a suction side casing in the bottom part of the impeller, pressure adjusting holes 13 for balancing a pressure with each other in a symmetrical position relating to the pump shaft center, of a pressure generated in a flow path in the impeller 1, are provided in an impeller hub 16, and each hole is connected by a pressure adjusting pipe 17. The pressure adjusting hole 13 is provided in a casing liner 3, and the holes in a position symmetrical with each other are connected by the pressure adjusting pipe 17. Further, the pressure adjusting hole 13 of passing through a pressure surface and a negative pressure surface of an impeller vane is provided.

48. 发明专利

JPH04351348A ROTOR BALANCE CORRECTING METHOD 失效
公开(公告)号：JPH04351348A
公开(公告)日：1992-12-07
申请号：JP12718491
申请日：1991-05-30
申请人： HITACHI LTD
发明人： MATSUSHITA OSAMI , TAKAHASHI NAOHIKO , YONEYAMA MITSUO , FUKUSHIMA YASUO , HIROSHIMA MINORU , SAKANASHI TAKAFUMI , OHASHI TETSUO
IPC分类号： F16F15/32 , F16C32/04 , F16F15/36 , G01M1/20 , G01M1/30
摘要： PURPOSE:To perform correction of rotor balance easily and accurately by converting the vibration exciting force of a size, which can decrease rotor vibration resulting from its unbalance, into equivalent corrective weight on the unbalance correcting surface, and thereby subjecting the rotor to a balancing processing. CONSTITUTION:A rotor 1 is placed on a rigid balancer in a rotor balance correcting method using a soft type rigid balancer, and a vibrometer 4 is installed on a mount table 16 for bearings 2a, 2b of a rigid balancer, and then behavior of the mount table 16 is examined. That is, a vibration exciting controller 17 controls the drive of a hydraulic piston 18 as an exciter installed on the mount table 16 in conformity to the sensing signal given by the vibrometer 4. The rotor 1 is rotated at a high speed and approached to the resonance point, and the exciting force necessary for canceling the unbalance is calculated. Further the exciting force is converted into equivalent corrective weight on the unbalance correcting surface. The balancing processing is performed by cutting the rotor 1 or adding a weight thereto in accordance with this conversion value.

49. 发明专利

JPH04285314A CONTROLLER FOR MAGNETIC BEARING 失效
公开(公告)号：JPH04285314A
公开(公告)日：1992-10-09
申请号：JP4785791
申请日：1991-03-13
申请人： HITACHI LTD
发明人： TAKAHASHI NAOHIKO , MATSUSHITA OSAMI , TAKAGI YUKISHI , YONEYAMA MITSUO
IPC分类号： F16C32/04
摘要： PURPOSE:To certainly prevent the occurrence of oscillation at the moment when a rotor floats up. CONSTITUTION:When a floating up command for a rotor 1 is issued to control the taking-off motion of the rotor 1 through a take-off compensating circuit 11 for starting a floating up motion, a mode changing logic circuit 13 changes the mode from the take-off compensating circuit 11 to a suspension compensating circuit 12 by the detection of a displacement sensor, and a rotor floating up state is therefore controlled through the above compensating circuit 12. Thus the circuits 11, 12 share the contents of control according to the contents of the motion of a rotor 1, and the contents of control are severally selected according to the contents of motion for preventing the occurrence of oscillation at the moment of the floating up of the rotor, even in the case of a transverse type having the different rotor characteristics between the cases of landing and floating up.

50. 发明专利

JPH04203525A CONTROL FOR ELECTROMAGNETIC BEARING TYPE ROTOR 失效
公开(公告)号：JPH04203525A
公开(公告)日：1992-07-24
申请号：JP32930890
申请日：1990-11-30
申请人： HITACHI LTD
发明人： TAKAGI TAKAYUKI , MATSUSHITA OSAMI , TAKAHASHI NAOHIKO , SAITOU IKUHIRO
IPC分类号： F16C32/04
摘要： PURPOSE:To simplify the tuning of a control system by setting the phase delaying region of an electromagnetic bearing control circuit in the vicinity of the characteristic frequency of the measurement-disabled mode of a rotor and assembling the characteristic vibration mode having the lower characteristic frequency than that in the observation-disabled mode into an observer, having the mode as numerical value model. CONSTITUTION:A controlled system 7 inputs a dispacement signal (y) and a control force (u) into an observer 8, where the speed signal which is necessary for the state feedback and can not be observed is calculated by a numerical model assembled in the observer 8. The control force (u) is allowed to act on a rotor by the calculation to the above-described state quantity by a feedback gain calculator 9, and the rotor is held at a neutral position.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式