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Turbine speed regulating porthole mechanism capable of outputting accurate turn-off time

A technology of closing time and speed control valve, applied in the direction of machine/engine, mechanical equipment, engine components, etc.

Active Publication Date: 2010-10-06
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The LVDT outputs an analog signal, and the signal processing cycle is generally 100ms. The signal delay causes a large error in the measurement result of the closing time.

Method used

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  • Turbine speed regulating porthole mechanism capable of outputting accurate turn-off time
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  • Turbine speed regulating porthole mechanism capable of outputting accurate turn-off time

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Embodiment Construction

[0012] Below in conjunction with the examples, the present invention is further described, the following examples are illustrative, not limiting, and the protection scope of the present invention cannot be limited by the following examples.

[0013] A steam turbine speed regulating valve mechanism that can output accurate closing time, such as Figure 1~2 As shown, it includes an upper valve cover 2 and a lower valve body 7. The upper valve cover is sleeved on the outer edge of the lower valve body. A piston 6 is fixed in the upper valve cover through a valve stem 5. The piston can move axially in the lower valve body and can be opened or closed. Close the air circuit, and set an LVDT displacement sensor on the speed regulating valve, and its connection structure with the speed regulating valve is: the outer casing 8 of the built-in coil in the LVDT is coaxially fixed on the surface of the lower valve body, and the outer casing 8 is coaxially fixed on the surface of the lower v...

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Abstract

The invention relates to a turbine speed regulating porthole mechanism capable of outputting accurate turn-off time, which comprises an upper valve cover and a lower valve body, wherein the upper valve cover is sleeved on the outer edge of the lower valve body coaxially; a piston is arranged coaxially in a cavity formed by the upper valve cover and the lower valve body; a rod-shaped armature and an outer sleeve internally provided with coils are respectively and fixedly arranged on the upper cover and the outer edge of the lower valve body; the rod-shaped armature is embedded into the outer sleeve coaxially; a static contact and a movable contact which are in mutual contraposition are respectively arranged on the outer surfaces of the outer sleeve and the rod-shaped armature; and a circuit of communicating the static contact with the movable contact is connected with a power supply and a data acquisition instrument. The turbine speed regulating porthole mechanism has a simple structure and convenient use, and can reflect the action state of a porthole quickly, eliminate the error caused by signal time delay effectively, measure the turn-off time of the porthole accurately, and meet the control requirement of a generator set.

Description

technical field [0001] The invention belongs to the technical field of steam turbine power generation, in particular to a steam turbine speed regulating valve mechanism capable of outputting accurate closing time. Background technique [0002] With the development of society, the demand for electric energy is increasing day by day, and the single unit capacity of the power plant is also constantly expanding. Large-scale generator sets require higher reliability. Under special working conditions, the speed-regulating valve of the steam turbine is required to be closed quickly. To cut off the steam source, reduce the speed of the steam turbine to ensure the safety of the generator set. Among them, the valve closing time is a very important parameter and an important indicator for judging the operation of the unit. At present, the common speed regulating valve structure is: including the upper valve cover and the lower valve body, the upper valve cover is set on the outer edge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D17/10
Inventor 欧阳佳慧张宇张长志王建沙威刘新利
Owner STATE GRID TIANJIN ELECTRIC POWER