Variable-pitch mechanism for propeller

Abstract

The invention belongs to an airplane propeller design technology, and relates to a variable-pitch mechanism for a propeller. The variable-pitch mechanism for the propeller comprises a connecting rod,a lubricating oil tube, a lubricating oil tube core, an oil cylinder, a supporting cover and an adapter; one end of the connecting rod is connected with the oil cylinder while the other end is connected with a paddle eccentric pin; the lubricating oil tube is mounted on a propeller shell, and is fixed through the supporting cover; the lubricating oil tube core is mounted in the lubricating oil tube; the adapter is mounted on the lubricating oil tube core, and is used for connecting lubricating oil on an engine to the lubricating oil tube core; one end of the lubricating oil tube penetrates through the center of the oil cylinder, and the oil cylinder moves in the axis direction of the lubricating oil tube; and the lubricating oil tube and the oil cylinder form a variable-pitch large-distance oil cavity and a variable-pitch small-distance oil cavity of the propeller. By setting of the arrangement position of an oil line, the mounting modes of the lubricating oil tube and the oil cylinderare set, the number of parts of the variable-pitch mechanism of the propeller can be reduced, and the weight of the propeller is reduced.

Description

technical field [0001] The invention belongs to the aircraft propeller design technology, and relates to a propeller pitch variable mechanism. Background technique [0002] In the variable pitch propeller, there is a set of mechanisms for receiving instructions from the propeller control device to realize the real-time pitch change of the propeller blade angle. In order to reduce the weight of the propeller, on the basis of applying the principle of positive pitch change, the propeller pitch change mechanism is simplified, and the control logic of the propeller is reorganized to realize the function of propeller pitch change, and at the same time realize the large pitch limit and middle distance limit of the propeller And small distance limit function. For propellers designed with the principle of forward pitch change, a counterweight arm is installed on the blades to provide the propeller with the force to increase the pitch, so the propeller control device is required to ...

AI Technical Summary

Problems solved by technology

The defect is that the axial dimension of the propeller is too long, resulting in too many parts of the propeller. At the same time, the propeller using the principle of positive pitch change mechanism in the past needs a lubricating oil tube that can move with the piston, and the middle distance limit function is realized through the movement of the lubricating oil tube.

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