Device for emergency operation of actuators

A technology for actuators and hydraulic actuators, which is applied to parts of pumping devices for elastic fluids, fluid pressure actuators, safety devices, etc., can solve problems such as damage and stalling, and increase safety Effect

Active Publication Date: 2015-06-10
ANSALDO ENERGIA IP UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the gas turbine will coast down with the variable inlet guide vanes of the compressor open, which has a high probability of stalling and, as a result, can cause severe damage to the compressor or other parts of the gas turbine

Method used

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  • Device for emergency operation of actuators
  • Device for emergency operation of actuators
  • Device for emergency operation of actuators

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] exist Figure 1 to Figure 4b In the schematic hydraulic diagram of , examples of realization of the device for emergency operation of the hydraulic actuator 10 are shown in different operating states. For better understanding, the various active hydraulic lines are indicated in the figures with thicker lines and flow arrows.

[0024] exist figure 1 and figure 2 , an example of realization of the emergency device according to the invention is shown in normal operation, i.e. without any failure in the hydraulic system or with respect to the components of the device, where figure 1 shows the closed mode of normal operation of the hydraulic actuator 10, while figure 2 The opening mode of normal operation of the hydraulic actuator 10 is shown instead.

[0025] For normal operation and control of the hydraulic actuator 10, the device is provided with a proportional valve 1 installed in the hydraulic supply line 6 and in the hydraulic discharge line 7, which are respecti...

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PUM

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Abstract

Device for emergency operation of pneumatic or hydraulic actuators (10), which have for normal operation of the actuator (10) an operation cycle including at least a proportional valve (1) for switching to different operational conditions of said actuator (10) and related engine components, the proportional valve (1) being arranged in a supply line (6) of pressurized liquid / gas and in a drain line (7) connected to a tank, and control means for operation control and supervising functions, whereby an emergency cycle is attached to said operation cycle of said actuator (10) which is provided with: at least one solenoid valve (2, 12) for initiating an emergency operation impulse in case of detected failures; a plurality of pneumatically / hydraulically operated switch valves (3, 13; 4, 14; 5, 15) which may be activated through said impulse of an emergency signal from said solenoid valve (2, 12); and whereby the emergency cycle is adapted to bypass said proportional valve (1) in emergency situations and to either block said actuator (10) in its actual position or to bring said actuator (10) in a predefined safe position.

Description

technical field [0001] The invention relates to a device for emergency operation of a pneumatic or hydraulic actuator according to the preamble of claim 1 . Such hydraulic actuators are used, for example, for the operation of different engine components, for example for the actuation of variable inlet guide vanes of gas turbines. Background technique [0002] For the operation and control of such actuators, it is conventionally known to provide an operating cycle comprising at least one proportional valve for switching to different operating states of the actuator and associated engine components, wherein the proportional valve Arranged on the supply lines of pressurized liquid or gas and on the discharge lines connected to the tanks of the operating cycle, and in which control equipment is provided for different control and monitoring functions. During normal operation of such a hydraulic actuator, a proportional valve is used as a control device for switching the actuator...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/56F04D29/46F01D17/26
CPCF01D17/16F01D21/00F02C9/20F04D29/563F15B20/002F15B20/008F05D2270/64F15B2211/8752F15B2211/862F15B2211/30565F04D27/0246F02C7/00
Inventor S·巴纳E·伯奇R·鲍尔
Owner ANSALDO ENERGIA IP UK LTD
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