Propeller governor beta valve assembly

Abstract

One end of the valve is provided with a small-pitch end plug, and the other end of the valve is fixedly provided with a U-shaped fork. The bushing is pressed and fixed in an inner hole of a round mounting opening extending out of the speed regulator shell in an interference manner; the end, provided with the small-distance end plug, of the valve is assembled in the lining in a micro-gap mode. A return spring sleeved on the valve and fixed in the U-shaped fork groove is pressed on the adjusting washer; the cap is sleeved on the U-shaped fork, the adjusting washer and the excircle of the circular mounting port and is fixed on the circular mounting port; an oil groove is formed in the valve, the bushing is provided with a high-pressure oil outlet and a high-pressure oil inlet which are communicated with the oil groove, and a bushing inner cavity at the tail end of the small-distance end plug is an oil return cavity; in a normal working state, the high-pressure oil outlet is communicated with the oil groove, and during small-distance limiting, the small-distance end plug just seals the high-pressure oil outlet. The propeller speed regulator provided by the invention has a small-pitch limiting and fixed-pitch protection function, and has beta control and propeller reversing functions, so that the propeller structure becomes simple, the size becomes small, and the mass becomes light.

Description

technical field [0001] The invention relates to a beta valve assembly of a propeller governor. Background technique [0002] The existing propeller governor does not have a small-pitch limiting mechanism, and the propeller uses an end-face tooth meshing mechanism for fixed-distance protection. The end-face tooth meshing mechanism has a complex structure, which increases the volume and weight of the propeller, and cannot meet the needs of some aircraft such as airplanes. Requirements, there is an urgent need to study a propeller governor with the function of small-pitch limiting and fixed-pitch protection. There are also existing governors that do not have β control and anti-propeller functions. Aircraft landing and taxiing rely on methods such as reducing the propeller blade angle within a certain range to achieve a certain damping effect, but the effect is minimal. A very long runway wastes land resources and reduces the utilization rate of existing land resources. Theref...

AI Technical Summary

Problems solved by technology

[0002] The existing propeller governor does not have a small-pitch limiting mechanism, and the propeller adopts an end-face tooth meshing mechanism for fixed-distance protection. The end-face tooth meshing mechanism has a complex structure, which increases the volume and weight of the propeller, and cannot meet the needs of some aircraft such as airplanes. Requirements, it is urgent to study a propeller governor with the function of small-pitch limiting and fixed-pitch protection

There are also existing governors without β control and anti-propeller functions. The aircraft lands and taxis by reducing the propeller blade angle within a certain range to achieve a certain damping effect, but the effect is minimal. The aircraft lands and slides a long distance, which needs to be set Very long runway wastes land resources and makes the utilization rate of existing land resources low

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