Wind shield system for reducing oil injection lubrication wind resistance loss of high-speed spiral bevel gear

Abstract

The invention relates to a wind shield system for reducing oil injection lubrication wind resistance loss of a high-speed spiral bevel gear. The wind shield system comprises an inlet wind shield and an outlet wind shield, the inlet wind shield is composed of a plurality of inclined step faces, the inner sides of the step faces are matched with the driven wheel shaft face, the driven wheel small end side face and the driven wheel small end face which are parallel to the step faces, and the inlet wind shield end is fixed to an inner support of the gear box body. A conical opening is formed in the plane, parallel to the gear tooth surface of the driven gear, of the inlet wind shield, and space is reserved for meshing of the driving gear and the driven gear; a conical oil outlet groove is designed on the engaging-out side of the gear pair; the outlet wind shield is designed into a large arc structure corresponding to the large end face of the driven wheel, and the outlet wind shield is parallel to the large end side face of the gear and has a gap value; the wind shield structure is of a high-loss design, when the total pressure difference between an inlet and an outlet is given, the mass flow rate of air passing through the wind shield with the structural shape is reduced, that is, the air pumping efficiency of the wind shield with the structural shape is low, and then the wind resistance power loss is reduced.

Description

technical field [0001] The invention belongs to the field of aero-engine power transmission systems, and relates to a windshield system for reducing the wind resistance loss of high-speed spiral bevel gear oil injection lubrication. Background technique [0002] Spiral bevel gears are widely used in aeroengine power transmission systems due to their high load capacity, light weight, smooth transmission and good lubricity. As the transmission power of aero-engines increases, the speed of spiral bevel gears becomes higher and higher, and the transmission efficiency is one of the important performance indicators to measure the aero-gear transmission system. [0003] When aviation gears work at high speed, oil injection is mainly used to lubricate and cool them. At this time, lubricating oil and air are mixed around the gear to form an oil-air two-phase flow. When the gear rotates at high speed, it will drive the two-phase flow around it to generate a strong swirling flow field...

AI Technical Summary

Problems solved by technology

At this time, the wind resistance effect generated by the gear rotating flow field is relatively significant, which will prevent the lubricating oil from being sprayed onto the gear meshing surface, resulting in a sharp instantaneous temperature rise due to poor lubrication and cooling effects, and the additional heat generated by the wind resistance power loss, which is very easy to appear. Surface gluing, gear wear, gear thermal deformation, gear tooth metal phase transformation, lubrication and seal failure, etc., resulting in a serious decline in the performance of the transmission system and even accidents

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