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Temperature limitation device for gas turbine

A gas turbine and temperature limitation technology, applied in temperature control, non-electric variable control, control/regulation system, etc., can solve the impact, improve the safety and reliability of gas turbines, and achieve high reliability, simple testing, and product integration high degree of effect

Active Publication Date: 2016-10-12
CHINA HANGFA SOUTH IND CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The invention provides a temperature limiting device for a gas turbine to solve the technical problem that the increase of the exhaust temperature has a negative impact on the safety and reliability of the gas turbine operation

Method used

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  • Temperature limitation device for gas turbine
  • Temperature limitation device for gas turbine
  • Temperature limitation device for gas turbine

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Embodiment Construction

[0029] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] refer to figure 1 , a preferred embodiment of the present invention provides a temperature limiting device for gas turbines, including a temperature signal processing circuit 10, a voltage comparison circuit 20 and an execution circuit 30, wherein the temperature signal processing circuit 10 is externally connected to a thermocouple, and is used to connect the thermocouple The collected temperature millivolt signal corresponding to the exhaust gas temperature after the turbine of the gas turbine is amplified and the thermocouple is cold-junction compensated to output the temperature signal voltage; the voltage comparison circuit 20 is connected with the temperature signal processing circ...

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Abstract

The invention discloses a temperature limitation device for a gas turbine. The temperature limitation device comprises a temperature signal processing circuit, a voltage comparison circuit and an execution circuit, wherein the temperature signal processing circuit is used for amplifying temperature millivolt signals and subjecting a thermocouple to cool junction compensation, and therefore temperature signal voltage can be output; the voltage comparison circuit is used for presetting reference voltage and comparing preset reference voltage with the temperature signal voltage output via the temperature signal processing circuit, and therefore a corresponding comparison result can be output; the execution circuit is used for outputting control voltage according to the comparison result of the voltage comparison circuit, and therefore an oil draining solenoid valve of an external circuit is controlled to drain oil upon overtemperature in gas turbine starting processes or a parking solenoid valve of the external circuit is controlled to perform fuel cut-off operation and halt the turbine in gas turbine working processes. The temperature limitation device for the gas turbine is simple in structure, high in reliability, great in ease of maintenance, simple in testing, high in product integration level, low in weight, high in work stability and great in responding speed.

Description

technical field [0001] The invention relates to the field of gas turbine exhaust temperature control, in particular to a temperature limiting device for a gas turbine. Background technique [0002] Generally speaking, gas turbine exhaust temperature control system includes main components such as thermocouple, compensation cable and temperature limiting device. The development of modern gas turbine technology has put forward higher requirements for the power, economy and safety and reliability of the engine. One of the main measures to improve its power performance is to increase its exhaust temperature under the premise of ensuring safety. The exhaust temperature is an important parameter to measure the performance of a gas turbine. However, the increase of exhaust gas temperature has a negative impact on the safety and reliability of the gas turbine. In order to ensure the safe operation of the gas turbine, a corresponding temperature limiting device must be designed to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/22
CPCG05D23/22
Inventor 王山峰陈伦祥袁伟高昆李旭文张达方姚成林晋红
Owner CHINA HANGFA SOUTH IND CO LTD
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