Dynamic variable pitch propeller
A variable pitch propeller and propeller technology, applied in the field of variable pitch function and dynamic pitch variable propeller, can solve the problems of inability to realize the propeller pitch variable function, complex structure, complex structure of hydraulic variable pitch propeller, etc.
Pending Publication Date: 2019-05-07
中航通飞华南飞机工业有限公司
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The mainstream variable pitch propeller uses hydraulic pressure to control the pitch, but the hydraulic variable pitch propeller has the disadvantages of complex structure, heavy weight and high cost
[0003] Gear transmission has been used in propeller static pitch change. It is used to adjust the propeller pitch on the ground, and it cannot realize the pitch change function during the dynamic working process of the propeller.
Some use worm and spur gears to drive the blades to rotate, so that the pitch of the propellers can be changed during the dynamic working process, but the structure is more complicated
Method used
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Embodiment Construction
[0017] The present invention consists of a plurality of paddles 1, an upper paddle shell 2, a lower paddle shell 3, a connecting rod 4, a plurality of bolts 5, a plurality of nuts 6, a plurality of washers 7, a plurality of bolts 8, and a plurality of nuts 9. It is composed of a plurality of spacers 10 , an adjusting disc 11 , a screw sleeve 12 and two bearings 13 .
[0018] The engine flange 14 on the aircraft is connected with the lower propeller shell 3-way bolt 8, nut 9 and gasket 10; the connecting rod 4 passes through the cavity in the center of the engine reducer, and is connected with the propeller control system on the aircraft.
[0019] The paddle 1 is fixed between the upper paddle shell 2 and the lower paddle shell 3; the bevel gear at the root of the paddle 1 meshes with the bevel gear on the outer ring of the adjusting disc 11, and the rotation of the adjusting disc 11 drives the paddle 1 on the upper paddle shell. 2 and rotate between the lower paddle shell 3. ...
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The invention relates to a dynamic variable pitch propeller. The dynamic variable pitch propeller is characterized by comprising propeller blades (1), an upper propeller shell (2), a lower propeller shell (3), an adjusting disc (11), a thread sleeve (12), bearings (13) and a connecting rod (4); the propeller blades (1) are fixed between the upper propeller shell (2) and the lower propeller shell (3); the lower propeller shell (3) is fixed on an engine flange plate; a bevel gear at the roots of the propeller blades (1) is engaged with a bevel gear on the external ring of the adjusting disc (11); the lower part of the adjusting disc (11) is embedded into an annular groove in the lower propeller shell (3) to prevent the adjusting disc (11) from shaking and being inclined; the internal ring ofthe thread sleeve (12) is connected with the connecting rod through the two bearings (13); the thread sleeve (12) rotates with the propeller; the connecting rod (4) does not rotate; and the forward and backward movements of the connecting rod (4) can drive the thread sleeve (12) to move forwards and backwards. According to the dynamic variable pitch propeller, in the propeller dynamic rotating process, the connecting rod 4 is controlled by a propeller operation system on an aircraft to move forwards and backwards so as to drive the thread sleeve (12) to move forwards and backwards; and therefore, the adjusting disc 11 is driven to rotate, and the bevel gear on the external ring of the adjusting disc 11 drives the propeller blades 1 to rotate so as to realize a dynamic pitch changing function of the propeller.
Description
technical field [0001] The invention belongs to the field of aircraft equipment design, and relates to a dynamic pitch-variable propeller, in particular capable of realizing the pitch-variable function of the propeller during operation through gear transmission. Background technique [0002] The propellers currently used in aircraft are divided into fixed-pitch propellers and variable-pitch propellers. The difference between the two mainly lies in whether the propeller can change the pitch during the working process of the propeller. The propeller that can change the pitch during the dynamic working process of the propeller is a variable-pitch propeller. The mainstream variable pitch propeller uses hydraulic pressure to control the pitch, but the hydraulic variable pitch propeller has the disadvantages of complex structure, heavy weight and high cost. [0003] Gear transmission has been used in propeller static pitch change, and it is used to adjust the propeller pitch on th...
Claims
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IPC IPC(8): B64C11/32
Inventor 翟冰冰张庆陈明生田傲宋文伟李符建翁小武
Owner 中航通飞华南飞机工业有限公司