Experimental device and method for measuring performance of centrifugal ventilator

Abstract

The invention provides an experimental device and method for measuring performance of a centrifugal ventilator. The experimental device includes an air branch, a lubricating oil branch, a mixed path and a tail gas path, wherein the lubricating oil branch formed by a lubricating oil box, a lubricating oil pump and a ball valve can realize accurate adjustment of flow of lubricating oil in a relatively large range, the air branch is connected with a valve through an air compressor, an air storage tank and a pipeline heater, a mixing box, a particle analyzer and a ventilator experimental box are connected in sequence to form the mixed path, lubricating oil and air are mixed in the mixing box according to a proportion requirement to form an oil-air mixture, the particle analyzer can measure lubricating oil particle size distribution before the oil-air mixture enters the ventilator experimental box, and an air-liquid ratio of the oil-air mixture that enters the ventilator can be obtained through metering of flow of lubricating oil and air. On end of the ventilator experimental box is connected with a variable frequency motor, and thus adjustment of different rotating speeds of the ventilator can be realized. The experimental device and method for measuring performance of the centrifugal ventilator complete testing of performance of the centrifugal ventilator.

Description

technical field [0001] The invention relates to the field of aero-engine lubricating oil systems, in particular to an experimental device and method for measuring the performance of a centrifugal ventilator. Background technique [0002] The lubricating oil system is an indispensable auxiliary system for aero-engines, and engines with different powers have different requirements on the size and weight of the lubricating oil system, so it is necessary to carry out separate design and research on the components of the lubricating oil system. During the working process of the engine, the air in the bearing cavity is mixed with the lubricating oil to form an oil-air mixture. If the mixture is directly discharged, a large amount of lubricating oil will be consumed. The function of the ventilator is to separate the lubricating oil in the mixture to reduce the consumption of lubricating oil. Therefore, the performance of the ventilator determines the performance of the entire lubr...

AI Technical Summary

Problems solved by technology

The disadvantage of this device is that it is impossible to accurately adjust the lubricating oil flow in a wide range; it is impossible to obtain the relationship between the particle size distribution of the inlet liquid, the mixing ratio of oil and gas, and the separation efficiency and resistance; when debugging the experimental system or adjusting the experimental parameters , the mixed gas will continue to flow into the ventilator, which will cause the inconvenience of the follow-up test and the inaccuracy of the experimental data; in this system, the Malvern instrument and the absorbent cotton are connected in the same branch, and there will be a large error when measuring the amount of unseparated lubricating oil

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