Automatic regulating device and automatic regulating method for lubrication oil pressure of aerial piston engine

Abstract

The invention discloses an automatic regulating device and an automatic regulating method for lubrication oil pressure of an aerial piston engine. The automatic regulating method comprises that the oil return quantity from a main oil passage to an oil return passage is controlled through a pressure regulating valve which is arranged between the main oil passage and the oil return passage of a lubricating system, wherein the oil return quantity which is controlled by the opening degree of the pressure regulating valve decreases with the lubricating oil pressure in the main oil passage, the pressure regulating valve is turned off under the lubricating oil pressure that the lubricating system is at a critical height, the lubricating oil quantity supplied to the main oil passage by the lubricating system at the critical height exceeds the minimum lubricating oil circulation quantity required by the engine, and the critical height is a preset value which is higher than the ceiling height of an aircraft. In the device, when the lubricating oil pressure decreases, the oil return quantity from the main oil passage to the oil return passage decreases till the pressure regulating valve is turned off, so that sufficient oil supply for lubrication pairs is guaranteed, and influence of atmospheric pressure during high-altitude flight is avoided.

Description

technical field [0001] The invention relates to an aviation piston engine, in particular to a lubricating oil pressure automatic adjustment device and an automatic adjustment method for the aviation piston engine. Background technique [0002] For the aviation piston engine to work reliably, the friction pairs must be lubricated. On the one hand, it reduces the wear and tear caused by the direct contact of the machine parts, thereby prolonging the service life of the machine parts; on the other hand, it changes the dry friction into liquid surface friction, reduces the energy loss caused by friction, and improves the mechanical efficiency. At the same time, the machine parts are cooled, and any kind of friction will release heat. If this part of heat is not dissipated, the machine parts will be in danger of overheating. [0003] When the lubricating oil passes through the bearing, it not only lubricates the parts, but also takes away heat. The greater the amount of lubrica...

AI Technical Summary

Problems solved by technology

[0005] In the practice of high-altitude flight, it is often found that the lubricating oil pressure of the engine lubrication system drops, which will cause poor lubrication or even deterioration of the engine and its accessories, and affect flight safety. The solution

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