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Method for inspecting water circulation system in water-cooling winding of turbonator

A technology of a steam turbine generator and an inspection method, which is applied in the directions of using electric devices, electromagnetic means, and thermometers using electric/magnetic components directly sensitive to heat, etc., can solve the problem of affecting the test results and sensitivity and the duration of inspection Procrastination is very long, and the test curve and results are sensitive, fast and effective inspection, and the inspection results are accurate and reliable.

Inactive Publication Date: 2011-10-12
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for inspecting the internal water circulation system of the water-cooled winding of a turbogenerator, so as to solve the problem in the prior art that the duration of the inspection is delayed for a long time due to the slow cooling of the cold water, which seriously affects the test results and sensitivity.

Method used

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  • Method for inspecting water circulation system in water-cooling winding of turbonator
  • Method for inspecting water circulation system in water-cooling winding of turbonator
  • Method for inspecting water circulation system in water-cooling winding of turbonator

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specific Embodiment approach 1

[0008] Specific embodiment one: this embodiment comprises the following steps: one, the thermocouple of the temperature rise measuring device is arranged on the outer surface of the water outlet pipe of each stator winding respectively; water at normal temperature; 3. After reaching a stable temperature, then feed high-temperature water of the same temperature into each stator winding; at the same time, by recording the process of temperature change on the outer surface of the water outlet pipe; 4. Calculate the outer surface of each water outlet pipe The rate of surface temperature change, for the outlet pipe whose temperature change rate is less than 10% of the average temperature change rate, it is considered as a stator winding with internal blockage.

[0009] The inspection method of this embodiment is designed based on the principle that the temperature difference between the cooling water in the stator winding and the heated cooling water is large when the generator is i...

specific Embodiment approach 2

[0010] Specific implementation mode two: the following combination figure 1 This embodiment will be specifically described. The difference between this embodiment and Embodiment 1 is that the temperature rise measuring device includes a thermocouple 1, a charge amplifier 2, an A / D conversion circuit 3, a computer 4, a spring clip 5 and a thermal insulation material cover 6, and the thermocouple 1 The signal output end of the charge amplifier 2 is connected to the signal input end of the charge amplifier 2, the signal output end of the charge amplifier 2 is connected to the signal input end of the A / D conversion circuit 3, and the signal output end of the A / D conversion circuit 3 is connected to the signal input end of the computer 4; A bread of the thermal insulation material covering body 6 is wrapped around half of the spherical thermocouple 1 , and the other surface of the thermal insulation material covering body 6 is fixed on the inner surface of a pincer arm of the sprin...

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the thermocouple 1 is a manganese-constantan thermocouple, which is formed by sintering the ends of the manganese-copper wire and the constantan wire.

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Abstract

The invention relates to a method for inspecting a water circulation system in a water-cooling winding of a turbonator, in particular to a method for inspecting whether the water circulation system in the water-cooling winding of the turbonator is blocked or not, which is used for inspecting a circulating water system. By the method, the problem that the duration for inspection is long and the problem that test results and sensitivity are influenced seriously due to slow temperature reduction of cold water are solved. The method comprises the following steps of: 1, arranging a temperature measuring element on the outer surface of a water outlet pipe of each stator winding; 2, introducing room temperature water with the same temperature into each stator winding; 3, after the stable state of the temperature is reached, introducing high-temperature water with the same temperature into each stator winding, and recording the process of temperature variation on the outer surfaces of the water outlet pipes simultaneously; and 4, calculating the speed of the temperature variation of the outer surface of each water outlet pipe, and for the water outlet pipe of which the temperature variation speed is over 10 percent less than the average temperature variation speed, determining that the water pipe of which the inside is blocked.

Description

technical field [0001] The invention relates to a method for checking whether the internal water circulation system of the water cooling winding of a steam turbine generator is blocked. Background technique [0002] With the continuous expansion of the capacity of large turbogenerators, controlling the temperature rise of the stator winding of the generator to make it run within the allowable temperature rise range has become the key to ensure the safe and stable operation of the generator. At present, the water internal cooling technology of the stator winding is generally used for the cooling of the stator windings of large turbogenerators. Due to the complex structure of the stator windings of large generators, it is difficult to manufacture and install, and it is easy to cause poor circulation of the water system inside the stator windings. It is very important to test and check the internal water system of the generator stator winding to ensure that there is no blockage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/02
Inventor 马传兵张大为李志斌
Owner STATE GRID CORP OF CHINA
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