Landing gear buffer for oil hole changing in elongation stroke
A landing gear buffer and extended stroke technology, applied in landing gear, aircraft parts, transportation and packaging, etc., can solve the problems of not being able to meet the application requirements, reducing the extension speed of the piston rod, and large damping.
Active Publication Date: 2019-02-12
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
View PDF7 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in some special cases, when the landing gear buffer is required to have certain specific properties, the design of the above-mentioned oil-air buffer cannot meet the application requirements very well. The extension of the piston rod of the landing gear buffer provides it with an instantaneous pitch rate to complete the auxiliary take-off of the carrier aircraft. After the extension process is completed, the extension speed of the piston rod needs to be reduced, that is, the oil-air buffer needs to The damping at the beginning of the extension stroke is small to realize the protrusion of the piston rod, and the damping generated thereafter is relatively large to reduce the extension speed of the piston rod. The existing oil-gas buffer is in the process of extension stroke The big and bottom fixing of the middle oil hole obviously cannot meet the above requirements very well
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
[0059]The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the related application, not to limit the application. In addition, it should be noted that, for ease of description, only parts relevant to the present application are shown in the drawings.
[0060] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0061] It should be noted that in the description of this application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The terms of the indicated direction or positional relationship are based on the direction or positional r...
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 belongs to the technical field of aircraft landing gear structure design, and particularly relates to a landing gear buffer for oil hole changing in an elongation stroke. In the elongation stroke, the landing gear buffer can successively experience a first state, a second state, a third state, a fourth state and a fifth state, and the change of the relative position of a piston rod,an outer cylinder and a plunger of the landing gear buffer in the elongation stroke is used skillfully; through combination between different oil holes, oil hole changing of the landing gear buffer inthe elongation stroke is achieved, wherein the area of oil hole combination in the first state in the elongation stroke of the landing gear buffer is the largest, the damping produced by the landinggear buffer is smallest, and the requirement of rapid extension of the piston rod can be met; and the area of oil hole combination in the successively experienced second, third, fourth and fifth states thereafter is decreased, the produced damping is on the rise accordingly, and thus the speed of extension of the piston rod is decreased.
Description
technical field [0001] The application belongs to the technical field of aircraft landing gear structure design, and in particular relates to a landing gear buffer with an extended stroke variable oil hole. Background technique [0002] Aircraft landing gear buffers are designed to absorb and dissipate the kinetic energy of an aircraft during landing and taxiing to ensure aircraft safety. Among them, the oil-air buffer has high working efficiency, safety and reliability, and is widely used in landing gear. It uses oil to flow through oil holes to generate damping to dissipate energy. [0003] At present, in order to fully dissipate energy, the compression stroke and extension stroke of the oil-air buffer are generally designed with oil holes to produce damping. The existing oil-air buffer mainly dissipates energy in the compression stroke, and the extension stroke consumes less energy. , generally has a fixed size oil hole, and maintains a fixed damping coefficient. Howeve...
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 Applications(China)
IPC IPC(8): B64C25/60
CPCB64C25/60
Inventor 徐燕苑强波陈雷倪艳红杨旭
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA