Spraying angle-adjustable high-speed small droplet generation device

Abstract

The invention proposes a spraying angle-adjustable high-speed small droplet generation device. A testing device comprises a mechanical body, a gas supply system and an electromagnetic valve control system. Small droplets with different diameters can be generated through replacing a droplet end cover and adjusting the pressure and the pulse length of pulse compressed gas entering a cavity; the droplet spraying speed can be changed through changing the flow of air entering a droplet acceleration part coated with a superhydrophobic and oleophobic material coating layer; and the spraying angle of high-speed small droplets can be changed through rotating a droplet spraying angle adjusting part. The testing device can generate the high-speed small droplets with adjustable spraying angle, spraying speed and droplet diameter more effectively.

Description

technical field [0001] The invention relates to a test device, in particular to a high-speed small droplet generating device with adjustable spray angle. Background technique [0002] In the bearing chamber of an aero-engine, the lubricating oil is thrown out from the rotating parts of the bearing after lubricating the rolling bearing, and forms high-speed small oil droplets of different sizes. These high-speed small oil droplets finally collide with the wall of the bearing cavity at different incident angles. Some of the oil droplets splash and form secondary oil droplets and deposited oil films, while the other part of the small oil droplets directly adhere to the wall to form deposited oil films. The deposited oil film flows on the wall of the bearing cavity and is discharged from the oil discharge port to realize the function of circulating heat dissipation. Analyzing the motion state and collision characteristics of high-speed small oil droplets in the bearing cavity i...

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Problems solved by technology

[0003] At present, there is no open literature on the high-speed small droplet generating device with adjustable spray angle that can reflect the working condition of the bearing chamber, the literature "A pneumatic droplet-on-demand generator. Cheng S, Chandra S. Experiments in Fluids. 2003,34 (6): 755-762 " discloses a kind of liquid drop generating device, and in this paper, the author utilizes this test device to produce the tiny liquid drop of diameter, but the droplet velocity that this test device produces is too low, and droplet The range of diameter change is small, and the spray angle of the droplet cannot be changed, that is, it can only drop vertically

The droplet size, collision speed, collision angle and other parameters produced by the test device are quite different from the actual working conditions of small oil droplets moving at high speed in the bearing cavity, which cannot meet the requirements of the research on the running state of high-speed small oil droplets in the bearing cavity and the different conditions. Incidence Angle Impacting Wall Requirements

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