Bushing suitable for gas turbine transmission box body test and installation method thereof

Abstract

The invention relates to a bushing suitable for a gas turbine transmission box body test and a mounting method thereof. The bushing comprises a transmission box body, a driving shaft is arranged in the transmission box body, and a limited oil supply assembly is arranged at the opening part of the transmission box body; the limited oil supply assembly comprises a top bobbin, a top transition section connected with the end, extending into the transmission box body, of the top bobbin and a shaft end cover connected to the side, away from the top bobbin, of the top transition section, and the shaft end cover is coaxially arranged on the driving shaft in a sleeving mode. An oil gathering lining is coaxially arranged in the top transition section and comprises a shell and an overflow hole formed in the shell, an oil inlet channel is formed in the wall of the top bobbin, the oil outlet end of the oil inlet channel is communicated to an opening of the shell, and a protruding step is arranged at the position, close to the circumference of the driving shaft, of the shaft end cover. The vertical height between the bottom of the shell and the bottom of the overflow hole is larger than the convex step height of the shaft end cover. The oil gathering bushing can supply oil to the interior of the transmission box body at the same time, and can also provide required lubricating oil for the bearing.

Description

technical field [0001] The invention relates to the technical field of transmission box tests, in particular to a bushing suitable for the test of a gas turbine transmission box and an installation method thereof. Background technique [0002] The transmission box at the lower part of the gas turbine is one of the important accessories of the gas turbine. It is composed of multiple gear shafts meshing and assembled. When the gas turbine is running normally, the torque of the compressor is transmitted to the lubricating oil assembly and the fuel pump connected to it respectively, so as to provide lubricating oil and fuel for the gas turbine. At the same time, the compressor bearing lubricating oil is collected and circulated by the lubricating oil assembly. Therefore, the lower transmission box plays an important role in the normal operation of the gas turbine. [0003] When the lower transmission box is running on the gas turbine, the lubricating oil in the oil chamber of ...

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Problems solved by technology

[0004] At present, there is very little domestic research work on the test of the lower transmission box of the gas turbine alone, and if the lower transmission box is provided with the same lubricating oil flow rate when it is running on the gas turbine during the test, there will be two shortcomings: one is the lower transmission box When the tank is running independently, the amount of lubricating oil required for lubrication of the top bearing of the central transmission shaft is much smaller than the amount of lubricating oil provided; second, to achieve a large flow supply, a pump with higher parameters needs to be configured, and the construction cost of the test bench is relatively high

[0005] When conducting an independent test on the lower transmission box, if the amount of lubricating oil required for lubrication of the top bearing is provided directly, due to the special structure of the end cover, there is a convex step, and the lubricating oil will directly enter the lower transmission box shell from the round hole of the end cover. A very small amount may enter the bearing lubrication, thereby affecting the test results

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