JPS6340542U

JPS6340542U -

Info

Publication number: JPS6340542U
Application number: JP13380386U
Authority: JP
Priority date: 1986-09-02
Filing date: 1986-09-02
Publication date: 1988-03-16

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示すガスタービ
ンの可変ノズル制御装置のシステム構成図、第２
図は同じくその制御系の構成を示す回路図、第３
図はリングギヤに噛み合う多数の可変ノズルを示
す斜視図、第４図は従来のガスタービンの可変ノ
ズル制御装置の例を示す概略システム構成図であ
る。１…可変ノズル、２…ギヤ、３…リングギヤ、
５ａ，５ｂ…油圧シリンダ、６…サーボバルブ、
１０…偏差検出回路、１１…サーボバルブ駆動回
路、１５…ソレノイドバルブ、２０…設定値変化
率検出手段、３０…実際値変化率検出手段、４０
…油圧シリンダの一方を不作動にする手段、ＶＮ
ｓｅｔ…可変ノズルの設定値、ＶＮｆｂ…可変ノ
ズル実際値。 Figure 1 is a system configuration diagram of a variable nozzle control device for a gas turbine showing one embodiment of this invention;
The figure is also a circuit diagram showing the configuration of the control system.
The figure is a perspective view showing a large number of variable nozzles meshing with a ring gear, and FIG. 4 is a schematic system configuration diagram showing an example of a conventional variable nozzle control device for a gas turbine. 1...Variable nozzle, 2...Gear, 3...Ring gear,
5a, 5b...hydraulic cylinder, 6...servo valve,
DESCRIPTION OF SYMBOLS 10... Deviation detection circuit, 11... Servo valve drive circuit, 15... Solenoid valve, 20... Setting value change rate detection means, 30... Actual value change rate detection means, 40
...Means for deactivating one of the hydraulic cylinders, VN
set...Variable nozzle setting value, VNfb...Variable nozzle actual value.

Claims

[Claims for Utility Model Registration] A ring gear that meshes with a gear fixed to each rotating shaft of a large number of variable nozzles of a gas turbine, a pair of hydraulic cylinders that rotate the ring gear, and setting of the rotational position of the variable nozzle. A variable nozzle control device for a gas turbine, comprising means for driving the pair of hydraulic cylinders according to a deviation between a value and an actual value, and outputting a detection signal when a rate of change of the set value is equal to or greater than a preset value. a set value change rate detection means,
an actual value change rate detection means that outputs a detection signal when the change rate of the actual value is equal to or greater than a preset value; and when both the set value change rate detection means and the actual value change rate detection means output a detection signal. A variable nozzle control device for a gas turbine, further comprising means for inactivating one of the pair of hydraulic cylinders.