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A Siemens 9f gas turbine combined cycle unit constant exhaust cylinder temperature clutch engagement control method

A combined cycle unit, Siemens' technology, applied in the field of meshing control, can solve the problems of low support rigidity of the No. 8 bearing, affecting the safety and stability of the unit, unstable vibration of the bearing bush, etc., and achieves a simple and easy operation method, ensuring safety and stability performance, vibration reduction effect

Active Publication Date: 2021-11-19
ZHEJIANG ZHENENG TECHN RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to structural design, installation, operating conditions and other reasons, the supporting stiffness of the No. 8 bearing is low, which may easily cause unstable vibration of the bearing bush
The SSS clutch is used between the generator and the steam turbine of the unit to engage. This type of unit generally has the problem of excessive vibration during start-up and rotation, especially during the clutch engagement process, which seriously affects the safety and stability of the unit.

Method used

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  • A Siemens 9f gas turbine combined cycle unit constant exhaust cylinder temperature clutch engagement control method
  • A Siemens 9f gas turbine combined cycle unit constant exhaust cylinder temperature clutch engagement control method
  • A Siemens 9f gas turbine combined cycle unit constant exhaust cylinder temperature clutch engagement control method

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the examples. The description of the following examples is provided only to aid the understanding of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0025] By analyzing the start-up process of Siemens 9F gas turbine combined cycle unit, the present invention finds out the root cause of relatively large unit vibration in the engagement process of the steam turbine and SSS clutch, and proposes a clutch engagement control method with constant exhaust cylinder temperature to solve the vibration problem .

[0026] As mentioned above, the SSS clutch is used between the unit generator and the steam turbine to engag...

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Abstract

The invention relates to a Siemens 9F gas turbine combined cycle unit constant exhaust cylinder temperature clutch engagement control method, comprising the steps of: 1) using SSS clutch engagement between the unit generator and the steam turbine; 2) setting the unit lubricating oil temperature as T, T corresponds to The absolute vacuum degree of the steam turbine is P1, the ambient atmospheric pressure is P0, and before the SSS clutch engages with the steam turbine shaft, the set value of the relative vacuum degree of the steam turbine is P2; Set the relative vacuum to P2. The beneficial effects of the present invention are: the operation method of the present invention is simple and easy to implement, and does not need to make changes to the bearing pad body or the system. There is no need for equipment modification of the gas turbine unit, no additional investment costs, and simple operation. It only needs to properly break the vacuum during the start-up of the unit and increase the expansion of the #8 bearing installed in the condenser to effectively reduce the vibration during the start-up of the unit. So as to ensure the safety and stability of the unit.

Description

technical field [0001] The present invention relates to a meshing control method, more specifically, it relates to a Siemens 9F gas turbine combined cycle unit constant exhaust cylinder temperature clutch meshing control method. Background technique [0002] Gas-steam combined cycle (CCPP) unit is favored because of its advantages of high efficiency, environmental protection and flexibility. Most domestic CCPP units are positioned as peak-shaving units, with frequent start and stop. Siemens is currently one of the main suppliers of gas turbines. Its 9F-class gas-steam combined cycle units are composed of F-type gas turbines, HE-type triple-pressure reheat double-cylinder steam turbines, generators, waste heat boilers, etc., of which gas turbines, generators, steam The turbines are coaxially arranged. [0003] The shaft system of Siemens 9F gas combined cycle unit is arranged on a single shaft. It is composed of a gas turbine, a generator, a steam turbine high-pressure roto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D15/12F01D21/00F01D25/16F01D25/30
CPCF01D15/12F01D21/00F01D21/003F01D25/16F01D25/30
Inventor 杨敏吕力行陈强峰童小忠王小荣吴恒刚顾伟飞来鸣汪忠德
Owner ZHEJIANG ZHENENG TECHN RES INST
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