Rotation speed protection adjustment device of self-contained steam turbine

Abstract

The invention relates to a rotation speed protection adjustment device of a self-contained steam turbine, and belongs to the technical field of rotation speed protection adjustment of steam turbines. The device comprises an integrated electro-hydraulic actuator, a speed measurement device, a controller, a steam adjustment valve, a steam bypass valve, and an oil pipeline, wherein a sensor of the speed measurement device is mounted on a gear on the bottom of the steam turbine; the controller is connected with the electro-hydraulic actuator by a control signal line; the integrated electro-hydraulic actuator is connected with the steam bypass valve by a soft oil pipe and connected with the steam adjustment valve by the soft oil pipe; the steam adjustment valve is connected with the steam inlet side of the steam turbine, the steam turbine is bypassed with the steam adjustment valve by the steam bypass valve, and two ends of the steam bypass valve are connected with the steam inlet and the steam outlet respectively. The device has features of simple and compact structure, strong interference resistance, fast dynamic response, high output rigidity and high positioning accuracy, and such as installation and debugging are easy to standardize and the complexity degree of the related work is high.

Description

technical field [0001] The invention belongs to the technical field of steam turbine rotational speed protection and adjustment, and in particular relates to the structural design of a steam turbine rotational speed protection and adjustment device. Background technique [0002] At present, low-pressure turbine oil DEH (digital electro-hydraulic regulating device) and high-pressure anti-fuel DEH (digital electro-hydraulic regulating device) are mostly used for conventional steam turbine speed protection regulation. The electronic parts of the two regulating devices are basically the same (there are some differences in the application program) ), but their control performance is quite different. The main reason is that the hydraulic servos in them are different. [0003] A serious problem of low-pressure turbine oil DEH (Digital Electro-hydraulic Regulator) is that there is a control cycle, which includes the conversion of the adjusted quantity into a digital quantity in the...

AI Technical Summary

Problems solved by technology

Improper selection of sealing materials in the system will cause swelling, corrosion and deformation of the seals, which will lead to leakage, jamming and even failure of hydraulic action, and even cause safety accidents in severe cases

The seal materials commonly used in the triaryl phosphate fuel-resistant fuel, such as fluorine rubber, polytetrafluoroethylene, etc., are slightly toxic, and long-term large-scale use will cause damage to the environment

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