Method and tool for measuring and trimming steam sealing radial gap of steam turbine set

Abstract

The invention discloses a steam sealing gap measuring ruler, which comprises a measuring rod, a dial indicator and a measuring head, wherein the dial indicator is positioned at the upper end of the measuring rod; the measuring head is positioned at the lower end of the measuring rod; a through hole is formed in the measuring rod; a thread sleeve is arranged on the upper part of the through hole; a measuring needle is arranged in the thread sleeve; the top of the measuring needle is connected with the dial indicator; a spring is sleeved outside the middle part of the measuring needle; the top of the spring is fixedly connected with the thread sleeve; the tail end of the spring is connected with a tightening force sleeve; and the tightening force sleeve is fixed on the measuring needle. By the technical scheme, a whole circle of sealing radial gap is quantitatively measured by using the steam sealing gap measuring ruler, an actual gap value of the sealing radial gap is read, and purposive and targeted scraping is carried out. A construction method has a relatively low requirement on professional skills of a constructor, so even if the constructor is a new employee, the constructor can well master the construction method soon after being trained and make a qualified sealing radial gap.

Description

technical field [0001] The invention relates to a method for measuring and trimming the radial gap of the steam seal of a steam turbine unit, and provides a measuring tool and a trimming tool. Background technique [0002] The function of the steam turbine generator set in a thermal power plant is to convert the heat energy generated by heating water after burning coal through the boiler of the power plant into electrical energy through the work done by the steam turbine generator set. In order to ensure that the steam can fully perform work inside the steam turbine, a steam seal device is produced. According to its function, the steam seal device is divided into: shaft end steam seal (high pressure end, low pressure end), diaphragm steam seal and blade top steam seal. The function of the shaft end seal is to prevent the steam on the high pressure side of the steam turbine unit from leaking into the outside air and to prevent the outside air from leaking into the negative p...

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Problems solved by technology

[0003] In the past construction, the adjustment of the steam seal gap was judged by grinding the rubber cloth, and then qualitative analysis was carried out based on experience. This method was greatly affected by the personal professional skills of the construction personnel. Each person made a judgment based on the situation of the rubber grinding cloth are not the same, so there is a large error

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