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271. 发明专利

JPS61265310A OVERSPEED PREVENTING EQUIPMENT OF STEAM TURBINE 失效
公开(公告)号：JPS61265310A
公开(公告)日：1986-11-25
申请号：JP10694585
申请日：1985-05-21
申请人： ISHIKAWAJIMA HARIMA HEAVY IND
发明人： IJICHI NOBUAKI
IPC分类号： F01D21/00 , F01D21/02
摘要： PURPOSE:To brake a turbine and reduce the overshoot by connecting a steam discharge passage to a preliminary nozzle chamber and opening the preliminary nozzle chamber to an outlet pipe at the same time when load is cut off. CONSTITUTION:A steam discharge passage 25 is connected to the preliminary nozzle chamber 19 of a steam turbine via a steam discharge valve 26. And the valve 26 is opened simultaneously with the load cutting-off time of have the preliminary nozzle chamber open toward the outlet pipe, whereby feeding back steam from a turbine a casing 2 toward the preliminarily nozzle chamber 19 to brake a turbine.

272. 发明专利

JPS61214720A BACK UP EXCESSIVE SPEED TRIP CONTROLLER 失效
公开(公告)号：JPS61214720A
公开(公告)日：1986-09-24
申请号：JP5452385
申请日：1985-03-20
申请人： HITACHI LTD
发明人： WATANABE SABURO
IPC分类号： H02H7/06 , F01D21/02 , F01D21/14

273. 发明专利

JPS61167104A TURBINE OVER-SPEED PREVENTING DEVICE 失效
公开(公告)号：JPS61167104A
公开(公告)日：1986-07-28
申请号：JP594585
申请日：1985-01-18
申请人： FUJI ELECTRIC CO LTD
发明人： IMAIZUMI SHINICHI , SAWAZATO MASAHIRO
IPC分类号： F01D21/00 , F01D21/02
摘要： PURPOSE:To prevent the disturbance to an electric power system by delaying the speed of response in a control circuit which operates a regulating valve to close at the time of sudden increase of effective power in a turbine over-speed preventing device so that the closing operation of the regulating valve in response to the sudden fluctuation of electric power can be prevented. CONSTITUTION:An electric power detector 36 is provided in the output side of a generator 16 which is driven by a turbine 14, and the output of this detector is input to a comparator 86 via a high gain amplifier 80, an integrator 82 and an inversion amplifier 84, and then the signal II is compared with the signal I. The open or shut of an over-speed preventing solenoid valve 28 is controlled by driving an auxiliary relay 88 through the output III of the comparator 86. Thus, the over-speed preventing solenoid valve 28 is not excited and does not perform close operation for the increase of output of the generator 16 by setting the time constant of the integrator 82 at a larger value. Accordingly, unnecessary disturbance to an electric power system can be prevented.

274. 发明专利

JPS61129407A Detecting circuit of rapid load decrease in parallelly connected turbine generator 失效
标题翻译：检测平行连接涡轮发电机中快速负载降低的电路
公开(公告)号：JPS61129407A
公开(公告)日：1986-06-17
申请号：JP24961384
申请日：1984-11-28
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： OTA HIROSHI , FUJITA ISAO , MAEDA TAKAYOSHI
IPC分类号： F01D21/02
CPC分类号： F01D21/02
摘要： PURPOSE:To prevent an intercept valve from opening and closing due to an influence of a side flow in parallelly connected turbine generators when a load is interrupted, by parallelly connecting a rapid load decrease detecting relay of each primary and secondary turbine generator. CONSTITUTION:A rapid load decrease detecting relay 3 of a primary turbine generator and a rapid load decrease detecting relay 4 of a secondary turbine generator are parallelly connected. In normal operation, each relay 3, 4 is turned off, further a reheat steam pressure detector 5 is turned on, and a time limit resetting relay 9 is placed in an on-condition. If a load interruption occurs, each relay 3, 4 is turned on, and a rapid closing relay 10 is turned on generating an intercept valve rapid closing signal. Here one of the relays 3, 4 is turned on and off due to a side flow flowing from the turbine generator with output voltage delaying its phase to the other turbine generator, but each relay 3, 4, being parallelly connected, prevents the rapid closing relay 10 from being reset.
摘要翻译：目的：通过并联连接每个主涡轮发电机和次级涡轮发电机的快速负载减小检测继电器，在负载中断时，为了防止截流阀在平行连接的涡轮发电机中由于侧流的影响而打开和关闭。构成：主涡轮发电机的快速负载下降检测继电器3和副涡轮发电机的快速负载减小检测继电器4并联连接。在正常操作中，每个继电器3,4关闭，另外再热蒸汽压力检测器5接通，并且时间限制复位继电器9处于开启状态。如果发生负载中断，则各继电器3,4导通，快速闭合继电器10接通，产生截流阀快速闭合信号。这里，继电器3,4中的一个由于来自涡轮发电机的侧流而导通和断开，输出电压使其相位延迟到另一个涡轮发电机，但是每个继电器3,4并联连接，防止快速闭合继电器10被复位。

275. 发明专利

JPS6125903A Overspeed protector for steam turbine 失效
标题翻译：蒸汽涡轮机超重保护器
公开(公告)号：JPS6125903A
公开(公告)日：1986-02-05
申请号：JP14426784
申请日：1984-07-13
申请人： Hitachi Ltd
发明人： AKUTAGAWA KUNIO
IPC分类号： F01D21/02 , F01D21/20
CPC分类号： F01D21/02
摘要： PURPOSE:To simplify the overspeed detective function test and make it safer by attaching testing targets, for function test of a protector, to the turbine shaft in addition to a target of a gear or the like set to the turbine shaft for detecting overspeed. CONSTITUTION:Gears 4 and 13 are set, around the rotating shaft 3 of a turbine 1 directly coupled with a generator 2, as targets for measuring the rotational speed and testing overspeed trip respectively. Close to the gears 4 an 13, magnetic pickups 5 and 14 are set up. The output signals of respective magnetic pickups 5 and 14 are selectively input into F/V transducer 6 through a changeover switch 15. During normal operation, the output voltage Vo of the magnetic pickup 5 and the preset voltage Vt of a trip voltage setting circuit 7 are compared with each other at a comparator 8, and yet, upon function testing, the output voltage Vs of the magnetic pickup 14 and the preset voltage Vt are compared with each other. Every time Vo or Vs exceeds Vt, a trip signal is output on to a turbine protector 9 and display unit 12.
摘要翻译：目的：为了简化超速检测功能测试，并通过将测试目标，保护器的功能测试附加到涡轮轴，除了设置到涡轮轴的齿轮等的目标之外，还可以更安全地检测超速。构成：将齿轮4和13设置在与发电机2直接耦合的涡轮机1的旋转轴3周围，作为分别用于测量转速和测试超速跳闸的目标。靠近齿轮4和13，设置磁性拾取器5和14。各个磁性拾取器5和14的输出信号通过切换开关15选择性地输入到F / V变换器6.在正常操作期间，磁性拾取器5的输出电压Vo和跳闸电压设置电路7的预设电压Vt 在比较器8中彼此进行比较，然而，在功能测试时，将磁性拾取器14的输出电压Vs与预置电压Vt进行比较。每当Vo或Vs超过Vt时，跳闸信号输出到涡轮机保护器9和显示单元12。

276. 发明专利

JPS60259710A TURBINE CONTROLLING APPARATUS 失效
公开(公告)号：JPS60259710A
公开(公告)日：1985-12-21
申请号：JP11458684
申请日：1984-06-06
申请人： HITACHI LTD
发明人： TAKETOMO MASAKI , KUWAJIMA HIDESUMI
IPC分类号： F01D21/00 , F01D17/06 , F01D21/02
摘要： PURPOSE:To simplify the mechanism and system for controlling turbine speed for improving reliability by providing limit setting speed in an intercepting valve control unit to control turbine speed with the intercepting valve opened and closed by a solenoid valve. CONSTITUTION:Speed error 29 obtained from comparing a turbine speed signal 27 with set speed 28 and integrated acceleration error 34 obtained from comparing an acceleration signal 31 with set acceleration 32 are sent to the input of a circuit 35 for giving a priority to low value and a load setting signal 43 is added to the output signal 42 of said circuit. The added signal is converted to speed signal for a normal control system by the use of a regulator valve setting rate alphacv, while being sent to an electromagnetic valve 56 and an intercepting valve 52 through a hysteresis circuit 55. When the turbine speed is reduced to 101% of rating, the electromagnetic valve 56 is excited to increase speed and when it exceeds 102%, the electromagnetic valve 56 is deenergized to reduce speed so that the rated speed is set by the repetition of said procedures.

277. 实用新型

JPS60170002U 失效
公开(公告)号：JPS60170002U
公开(公告)日：1985-11-11
申请号：JP5739984
申请日：1984-04-20
IPC分类号： F01K7/24 , F01D21/00 , F01D21/02 , F01D21/18 , F01K7/22 , H02P9/04

278. 实用新型

JPS6032322Y2 JPS6032322Y2 - 失效
公开(公告)号：JPS6032322Y2
公开(公告)日：1985-09-27
申请号：JP6440177
申请日：1977-05-18
IPC分类号： F01K25/10 , F01D21/00 , F01D21/02 , F01K25/08 , F02D29/06 , F16D57/02 , F16D57/04

279. 发明专利

JPS58211504A High speed valve control system 失效
标题翻译：高速阀控制系统
公开(公告)号：JPS58211504A
公开(公告)日：1983-12-09
申请号：JP9455982
申请日：1982-06-02
申请人： Toshiba Corp
发明人： SHIBATA TADAHARU
IPC分类号： F01K7/24 , F01D15/10 , F01D21/00 , F01D21/02 , H02P9/04
CPC分类号： F01D21/02
摘要： PURPOSE:To improve the stability of operation by a method wherein when an electric power system is stabilized in case of occurance of troubles, an intercept valve is fully closed at a high speed, in turn a steam adjuster valve is closed to a desired degree of opening, and thereafter controlled in reference to the output of automatic load setting unit. CONSTITUTION:When a trouble occurs in the electric power system and high speed valve control (EVA) operating signal is produced, EVA starting instruction contact points 18 and 27 are turned on and an intercept valve 5 is fully closed at a high speed through a servo valve 16. A steam adjuster valve 2 is closed through a servo valve 25 up to the desired degree of opening alpha of the unit 28 for setting the degree of opening of the steam valve with a relative low rate of variation in speed set by the unit 29 for setting a closing speed of the steam adjuster valve. Upon occurance of EVA, a difference between the output from the automatic load setting unit 32 and an actual load 34 is fed to a load limiter 23 through an integrater 35 and compared with an instruction signal 22 for steam adjuster valve, and the lower signal is fed out to the servo valve 25 as the valve opening degree control signal.
摘要翻译：目的：通过一种方法提高操作的稳定性，其中当发生故障的情况下电力系统稳定时，截流阀以高速完全关闭，随后蒸汽调节阀闭合到期望的程度打开，然后根据自动负载设定单元的输出进行控制。构成：当电力系统发生故障并产生高速阀控制（EVA）运行信号时，EVA起动指令接点18和27接通，截流阀5通过伺服高速全闭蒸汽调节阀2通过伺服阀25封闭，直到单元28的所需开度α，用于以单位设定的相对低的速度变化设定蒸汽阀的开度 29设定蒸汽调节阀的关闭速度。在发生EVA时，通过积分器35将来自自动负载设定单元32的输出与实际负载34之间的差异供给到负载限制器23，并与蒸汽调节阀的指示信号22进行比较，下部信号为作为阀开度控制信号输出到伺服阀25。

280. 发明专利

JPS5836162B2 失效
公开(公告)号：JPS5836162B2
公开(公告)日：1983-08-08
申请号：JP10746777
申请日：1977-09-06
申请人： MITSUBISHI ELECTRIC CORP
发明人： HIRAYAMA HIROHIDE
IPC分类号： F01D21/02 , H02H7/06 , H02P9/04

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