A pitch-change mechanism and pitch-change propeller with automatic pitch change with flight height
A technology of flight height and pitch-changing mechanism, which is applied in the field of aircraft, and can solve problems such as inability to cope with automatic changes in working conditions, complex structure and heavy weight of the pitch-changing mechanism
Active Publication Date: 2022-04-26
GOERTEK ROBTICS CO LTD
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, most of the existing blade pitch-changing mechanisms are driven by mechanical-hydraulic mechanisms, which require the use of various pumps, valves and sensors, resulting in complex structures and heavy weights of the pitch-changing mechanisms, and many of them require manual adjustment, which cannot cope with industrial problems. automatically change
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0027] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific orientation construction and operation, therefore should not be construed as limiting the application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be co...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a pitch-variable mechanism and a pitch-variable propeller which automatically varies pitch with flying height. The distance changing mechanism includes: negative pressure cylinder, piston, spring and rotating device; the piston seals the negative pressure cylinder and can slide back and forth along the negative pressure cylinder, and the spring is placed in the negative pressure cylinder along the moving direction of the piston; the piston is connected by the rotating device The blade of the aircraft, when the aircraft flies to different heights, the spring deforms to balance the change of air pressure, pushes the piston to slide, and the piston drives the blade to rotate through the rotating device to change the pitch. This application uses a negative pressure cylinder with a built-in spring, and the piston of the negative pressure cylinder and the rotating device are connected to the blades. Since the piston moves corresponding to the flight height under the joint action of the spring and the external atmospheric pressure, the blades are automatically driven according to the flight height. Turning to change the pitch of the blades is simpler and lighter than hydraulic drives, and can be automatically adjusted to match the flight height without manual control.
Description
technical field [0001] The invention relates to the technical field of aircraft, in particular to a pitch-changing mechanism and a pitch-changing propeller that automatically changes pitch with flying height. Background technique [0002] Pitch refers to the distance traveled up or forward when the propeller of the rotor or fixed wing rotates one revolution (360 degrees). Because the variable pitch propeller can make the propeller or rotor work efficiently under various working conditions through pitch adjustment, thus greatly expanding the flight envelope of the aircraft. [0003] However, most of the existing blade pitch-changing mechanisms are driven by mechanical-hydraulic mechanisms, which require the use of various pumps, valves and sensors, resulting in complex structures and heavy weights of the pitch-changing mechanisms, and many of them require manual adjustment, which cannot cope with industrial problems. The situation changes automatically. Contents of the inv...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B64C11/34
Inventor 韩伟石翔
Owner GOERTEK ROBTICS CO LTD