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Control method for high-low arranged lubrication oil double-tank system

A control method and lubricating oil tank technology, applied in the field of lubricating oil system, achieves the effect of high safety and convenient maintenance

Inactive Publication Date: 2017-03-01
天津有序环境科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there is no ready-made method to control it

Method used

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  • Control method for high-low arranged lubrication oil double-tank system

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] exist figure 1 In the first embodiment shown, the logical relationship of each signal is clearly shown, which is realized by PLC.

[0020] Including 220V AC solenoid valve, butterfly manual valve, manual valve status indication switch realized by position switch, 2 float level switches, signal from PLC data acquisition system that the temperature of steam turbine cylinder is greater than 100 degrees Celsius, manual button, in PLC Implemented time delayer. The PLC data acquisition system sends a signal that the temperature of the steam turbine cylinder is greater than 100 degrees Celsius. The auxiliary contact of the manual valve that has been closed is connected with the signal of the steam turbine cylinder temperature greater than 100 degrees Celsius through the NOT gate. The obtained logic signal is controlled by the manual button to open the solenoid valve.

[0021] When the low oil level signal from the liquid level switch installed on the oil tank at a higher posi...

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Abstract

The invention relates to a control method for a high-low arranged lubrication oil double-tank system. A closed auxiliary contact of a manual valve of the high-low arranged lubrication oil double-tank system is connected with a signal that the temperature of a turbine cylinder is greater than 100 DEG C through a NOT gate, and a turbine is halted; a solenoid valve is controlled to be started through a button; oil in a higher oil tank and oil in all oil pipelines are emitted into a lower oil tank; a bearing bush and a lubrication oil system are overhauled; and safety of operation of the turbine is fully considered. The control method has the advantages that safety is very high; overhaul is convenient; and the control method is suitable for manufacture of a control system of a new-generation turbine auxiliary engine.

Description

technical field [0001] The invention relates to a control method for a lubricating oil system of a steam turbine auxiliary system in a thermal power plant, in particular to a control method for a lubricating oil double tank system with a high and low arrangement. Background technique [0002] At present, in the actual operation of steam turbines in thermal power plants, there is a hidden danger of lubricating oil cut-off. According to the current design, the lubricating oil main oil pump supplies lubricating oil when the steam turbine is running. The inlet of the main oil pump is in the lubricating oil tank, and the outlet supplies 1 to 3 kg of pressure. Lubricating oil plays the role of lubricating and cooling the large shaft and bearing bush. A double lubricating oil tank system with a high and low arrangement, its two lubricating oil tanks are arranged separately, one of which is arranged on the generator floor higher than the main shaft, the lowest point of the oil tank ...

Claims

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Application Information

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IPC IPC(8): F01D25/18
Inventor 林峰
Owner 天津有序环境科技发展有限公司