Flow measuring tool and method for double-oil-way fuel nozzle

Abstract

The invention discloses a flow measuring tool and method for a double-oil-way fuel nozzle. The flow measuring tool comprises a mandrel, and the lower end of the mandrel is a plug which is used for being inserted in a bottom cup assembly of the fuel nozzle to plug a first oil way. A first groove is formed in the outer circle of the lower end of the plug, and a first sealing ring which is used for being matched with an inner hole of the bottom cup assembly of the fuel nozzle to achieve circumferential sealing of the fuel nozzle is stored in the first groove. A second groove is formed in the lower end face of the plug, and a second sealing ring which is used for being matched with the bottom face of the bottom cup assembly to achieve end face sealing of the fuel nozzle is stored in the secondgroove. The total flow of the nozzle is measured firstly, then one oil way of the double-oil-way fuel nozzle is plugged through the flow measuring tool, thus the flow of the other oil way is measured, and the flows of the two oil ways are obtained, so that the method is simple, and the measuring accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of aero-engine fuel nozzle flow test, and in particular relates to a double-oil-circuit fuel nozzle flow test tool and a test method. Background technique [0002] For the structure of a certain type of aero-engine fuel nozzle, see figure 1 , which is a parallel dual-channel fuel nozzle, the oil passages are the second oil passage 12 and the first oil passage 11, the first oil passage 11 is equipped with a bottom cup assembly 10, and the bottom of the bottom cup assembly 10 is equipped with an apron to ensure the bottom The assembly gap between the cup assembly 10 and the first oil passage 11 is sealed. Its working process is as follows: oil enters the oil inlet 13, the oil supply pressure gradually rises from low, the second oil circuit 12 supplies oil all the time, when the oil supply to the nozzle reaches the pressure P 1 When the first oil circuit 11 is also open to supply fuel; at different pressure p...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: two sets of special tooling are required, the cost is high, the test efficiency is low, and the test state is inconsistent with the actual working state of the fuel nozzle; Cavity and bottom cup inner cavity, that is, over-positioning, and the coaxiality and assembly errors of the parts, if the bottom cup assembly 10 is not assembled in place, when testing the flow rate of the first oil passage 11, it is easy to be blocked and unreliable. The problem of oil channeling between the two oil passages caused inaccurate test data

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