Steam turbine lubricating oil system pipeline flushing method

Abstract

The invention relates to the technical field of lubricating oil flushing, in particular to a steam turbine lubricating oil system pipeline flushing method. The method comprises the following steps that 1, manually cleaning the interiors of a main oil tank, a clean oil tank and a dirty oil tank through cleaning substances; 2, injecting temporary flushing oil into the cleaned clean oil tank or dirtyoil tank; 3, circularly flushing the temporary flushing oil among the main oil tank, the clean oil tank, the dirty oil tank and the connecting pipeline through an oil supply pump and an oil deliverypump until the total amount of impurities collected by the oil return filter screen does not exceed 1.0 g after the flushing time is 8 hours, and completely discharging the temporary flushing oil to an outdoor oil storage device; 4, manually cleaning the interiors of the main oil tank, the clean oil tank and the dirty oil tank through cleaning substances; and 5, confirming that necessary temporarymeasures are completed. According to the steam turbine lubricating oil system pipeline flushing method, the cleanliness of the steam turbine auxiliary lubricating oil system pipeline can be greatly improved, and guarantee is provided for safe, stable and reliable operation of a steam turbine and an auxiliary system thereof.

Description

technical field [0001] The invention relates to the technical field of lubricating oil flushing, in particular to a pipeline flushing method for a lubricating oil system of a steam turbine. Background technique [0002] The lubricating oil system of the turbogenerator set is an important subsidiary system of the turbogenerator set. Its main function is to provide lubricating oil for the supporting bearings, thrust bearings and turning gear of the turbogenerator set. The sealing oil system provides a backup oil source to ensure the needs of the unit in normal operation and accident conditions. Pipeline flushing of lubricating oil system is a safe and reliable method to remove all external impurities that may enter the oil system, so as to avoid damage to steam turbine bearings caused by impurities. [0003] The existence of impurities in the lubricating oil system will cause friction between the various parts as the steam turbine running time increases, and at the same time,...

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Problems solved by technology

[0003] The existence of impurities in the lubricating oil system will cause friction between the various parts as the steam turbine running time increases, and at the same time, a large amount of lubricating oil will be lost, which will weaken the flexibility of the various parts of the steam turbine, make the steam turbine not operate normally, and damage the running parts The stability between them, and if the operation time is too long, it may also make the steam turbine work load too heavy, and then damage the steam turbine

Moreover, due to the rapid flushing of impurities and high oil pressure, the cover effect of the steam turbine cannot be fully exerted, resulting in excessive oil pressure swings

And in the speed control system of the steam turbine, because the various pulses of the operation change differently and the range is small, the excessive swing of the oil pressure will also affect the excessive swing of the speed control system, and even cause the speed control system to generate load

In addition, during the operation of the steam turbine, the change of oil pressure is closely related to each speed control system, so the impurities in the lubricating oil system will also affect other speed control systems, causing the speed control system to jam, which will seriously damage the Caused the steam turbine out of control, causing a safety accident

[0004] In order to provide safe and reliable lubricating and cooling oil for steam turbine bearings, the lubricating oil system of steam turbines is usually finely designed, with a large number of equipment and complicated pipeline layout. Therefore, it is difficult to flush the lubricating oil system, and it will consume a lot of time and manpower

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