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81. 发明专利

JPH10103253A PUMPING MACHINE STATE MONITORING METHOD AND DEVICE THEREOF 失效
公开(公告)号：JPH10103253A
公开(公告)日：1998-04-21
申请号：JP26088496
申请日：1996-10-01
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： KUWABARA HISAO , HARADA MASATAKA , NAKAGAWA HIROTO , FUJII TOSHINARI , KUBO TOSHIKAZU
IPC分类号： F04B49/10 , F03B15/04
摘要： PROBLEM TO BE SOLVED: To visually confirm the present operation point to the back flow causing point at a high pump head of a pumping machine with ease and monitor the transition or trend of the operation state of the pumping machine at a glance. SOLUTION: In a field pump monitoring device 2, the head H, flow rate Q, rotation speed N and guide vane opening Y of a field pump 1 are calculated based on a given sampling period, and in a control device 3, coordinate transformation is conducted to convert these measured data into a given rotational speed state of a field pump or the equivalent in the same condition as that of the natural characteristic data, and the model pump data previously input in a display device 4 is displayed as a back ground, and the operation states of the field pump, which were coordinately transformed, are displayed superimposed. Each state quantity causing back flow can thus be monitored.

82. 发明专利

JPH1073071A GUIDE VANE SWITCHING DEVICE IN HYDRAULIC POWER GENERATION PLANT 失效
公开(公告)号：JPH1073071A
公开(公告)日：1998-03-17
申请号：JP19539597
申请日：1997-07-22
申请人： HITACHI LTD
发明人： TAKAHASHI KAZUO , SUGAI HIROSHI
IPC分类号： F03B3/18 , F03B15/04 , H02P5/50
摘要： PROBLEM TO BE SOLVED: To enable the operational force to guide vanes to be distributed to respective electrically driven surbo-motors by providing a synchronous control circuit for the purpose of synchronizing and actuating plural electrically driven surbo-motors independently connected to a guide ring connected to guide vanes via link mechanisms, in the control circuit of the motor. SOLUTION: Electrically driven surbo-motors 4, 5 are independently connected to a guide ring 3 connected to guide vanes 1 via link mechanisms and those operational state detection signals 6, 7, namely, the armature current and rotational speed signals of the rotors of electrically driven surbo-motors 4, 5 are fed in a control circuit 10 and simultaneously fed in a synchronous control circuit 8. In the synchronous control circuit 8, a deviation between the armature current and the rotational speed of a rotor of the electrically driven surbo- motors 4, 5 is found out, and a corrective signal 9 necessary for eliminating this deviation is outputted to the control circuit 10. And control signals 11, 12 of the electrically driven surbo-motors 4, 5 added with the corrective signal 9 is outputted by means of the control circuit 10.

83. 发明专利

JP2695967B2 失效
公开(公告)号：JP2695967B2
公开(公告)日：1998-01-14
申请号：JP12261590
申请日：1990-05-11
IPC分类号： F03B15/04

84. 发明专利

JP2685796B2 失效
公开(公告)号：JP2685796B2
公开(公告)日：1997-12-03
申请号：JP10191988
申请日：1988-04-25
IPC分类号： F03B15/04 , F03B15/18

85. 发明专利

JPH09310674A START CONTROL DEVICE FOR HYDRAULIC TURBINE GENERATOR 失效
公开(公告)号：JPH09310674A
公开(公告)日：1997-12-02
申请号：JP14787096
申请日：1996-05-20
申请人： TOSHIBA ENGINEERING CO
发明人： MATSUURA KATSUHIRO
IPC分类号： F03B15/04 , H02J3/38 , H02P9/00
摘要： PROBLEM TO BE SOLVED: To provide a start control device for a hydraulic turbine generator which can easily set up the start precedence of each unit in plurality of hydraulic turbine generators. SOLUTION: An automatic precedent unit selection section 9 automatically sets up a start precedence on the operation time of plural units of hydraulic turbine generators. On the other hand, the manual setting up of the start precedence is practicable through a unit precedence manual setter 1, and a unit start control section 4 starts plural units of hydraulic turbine generators according to the start precedence changed over by a manual automatic changer 10. Thus the start precedence can be set up both manually and automatically, and in the case where manual intervention is unnecessary, the hydraulic turbine generator can be started on the automatically set up start precedence.

86. 发明专利

JPH09303247A CONTROL METHOD FOR HYDRAULIC TURBINE AND PUMP HYDRAULIC TURBINE 失效
公开(公告)号：JPH09303247A
公开(公告)日：1997-11-25
申请号：JP14368296
申请日：1996-05-14
申请人： FUJI ELECTRIC CO LTD
发明人： KIMOTO YUTAKA
IPC分类号： F03B3/10 , F03B15/04
摘要： PROBLEM TO BE SOLVED: To restrain an increase in rotational speed, upon the interruption of a load, and properly maintain the strength and safety of a rotating part by adjusting the closing speed of a guide vane so as to correspond to a condition for water pressure and a load in a casing. SOLUTION: A speed setting unit 10 performs a subtraction process regarding an output signal and a signal detected with a speed detector, and a PID commuting element 14 receives a signal for a deviation from the output signal ▵p of a steady state speed drop rate outputting element 18, thereby outputting a proper servo motor opening degree instruction value. Also. water pressure in a casing downstream of an inlet valve is detected and the value of the water pressure is inputted to an output control characteristic computing element 40, together with an output from an opening degree detector 28. Thereafter, output calculated with the output control characteristic computing element 40 is inputted to an opening degree adjusting element 20. At the same time, adjustment is made so that the closing speed of the guide vane is kept high when a measured water pressure value is lower than a maximum water pressure value at the high pressure side. Thus, an increase in the rotational speed of a hydraulic turbine can be restrained at a low level.

87. 发明专利

JPH09222069A METHOD FOR STARTING HYDRAULIC POWER MACHINE 失效
公开(公告)号：JPH09222069A
公开(公告)日：1997-08-26
申请号：JP2881396
申请日：1996-02-16
申请人： TOSHIBA CORP
发明人： KUROSAWA SADAO , TOMIYASU HISAYUKI
IPC分类号： F03B3/02 , F03B15/04 , F03B15/18
摘要： PROBLEM TO BE SOLVED: To smoothly reach a target running state even when a guide vane fails at the time of starting by measuring a guide vane opening degree and opening the guide vane after correcting an opening degree operation amount based on a difference between a target guide vane opening degree and an actual guide vane opening degree. SOLUTION: When a starting instruction is issued from a main machine, first water is supplied up to the upstream side of a guide vane. Then, a pressure equivalent to a target guide vane opening degree is applied to a servo motor and the guide vane is opened by a hydraulic cylinder. At this time, a measurement rotational speed detected by a rotational speed detecting means 12 is compared with a target rotational speed and a guide vane opening degree operation amount proportional to its difference is calculated by a calculating means 13. A difference is also calculated between a measured guide vane opening degree measured by a guide vane opening degree measuring means 14 and the target guide vane opening degree, a guide vane opening degree operation amount is corrected by a guide vane opening degree operation amount correcting means 15 based on the difference and a guide vane opening/closing mechanism 16 is controlled based on the corrected value.

88. 发明专利

JP2644787B2 失效
公开(公告)号：JP2644787B2
公开(公告)日：1997-08-25
申请号：JP31884687
申请日：1987-12-18
申请人： HITACHI SEISAKUSHO KK , KANSAI DENRYOKU KK
发明人： KUWABARA HISAO , INOE HISAO , NAKAGAWA HIROTO
IPC分类号： F03B15/04

89. 发明专利

JPH09209899A DEFLECTOR OPENING AND CLOSING DEVICE FOR PELTON TURBINE 失效
公开(公告)号：JPH09209899A
公开(公告)日：1997-08-12
申请号：JP2077196
申请日：1996-02-07
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： SHIBAZAKI HIROSHI
IPC分类号： F04C28/06 , F03B1/00 , F03B15/04 , F03B15/22 , F04C28/28 , F04C29/10
摘要： PROBLEM TO BE SOLVED: To miniaturize a device and to expect precise motion. SOLUTION: An electric servo motor is constituted of a drive motor 16 to be actuated by a control signal, a gear row 14, a ball screw 12, a nut 13, etc., in a Pelton turbine setting a deflector 4 to restrain sudden rise of the number of rotations of the turbine by turning a jet water current jetted out from a needle valve aside from a runner 1 in the case when a load suddenly decreases. The ball nut 13 and the deflector 4 is connected to each other by a link mechanism. A powder clutch 15 and the gear row 14 are interposed between the drive motor 16 and the ball screw 12. Additionally, a spring 17 to instantly actuate the deflector 4 by accumulating energy by motion in the deflector opening direction and releasing it at the abnormal time is built in the electric servo motor.

90. 发明专利

JPH09100773A STARTING METHOD OF HYDRAULIC TURBINE SPEED GOVERNOR 失效
公开(公告)号：JPH09100773A
公开(公告)日：1997-04-15
申请号：JP28243795
申请日：1995-10-04
申请人： TANAKA SUIRIYOKU KIKAI SEISAKU
发明人： SUDO RYOSAKU
IPC分类号： F03B15/04 , F03B15/08
摘要： PROBLEM TO BE SOLVED: To eliminate setting of starting opening and adjusting work and to smoothly start a hydraulic turbine at stable rotational rising speed even when head, etc., change. SOLUTION: At the time of starting a hydraulic turbine, it is started while controlling rotational rising speed of the hydraulic turbine by a speed governor from the start without previously setting starting opening of a water nozzle part of the hydraulic turbine. For example, the rotational rising speed of the hydraulic turbine is controlled (S14, S15) by continuing to open the water nozzle part (S10, S11) until the hydraulic turbine reaches standard rotational rising speed from a stopping state, adjusting opening so as to make the rotational rising speed constant (S12, S13) until it reaches specified rotational speed after it reaches the rotational rising speed and adjusting opening so as to make smooth rotational rising speed by adding deflection from target rotational speed until it reaches the target rotational speed from specified rotational speed.

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