Details are as follows:
An elastic element with gas and liquid as working medium is composed of a pressure tube, a piston, a piston rod and several connectors, and its interior is filled with high-pressure nitrogen. Because the piston has a through hole, the gas pressure at both ends of the piston is equal, but the cross-sectional areas at both sides of the piston are different, one end is connected with the piston rod and the other end is not connected. Under the action of gas pressure, pressure is generated on the side with small cross-sectional area, that is, the elastic force of the support rod. The elastic force can be set by setting different nitrogen pressures or piston rods with different diameters.
Different from mechanical springs, support rods have nearly linear elastic curves. The elastic coefficient x of standard support bar is between 1.2 and 1.4, and other parameters can be defined flexibly according to requirements and working conditions.
Reasons for using hydraulic pressure:
1. Various components of hydraulic transmission can be conveniently and flexibly arranged as required.
2. Light weight, small volume, small motion inertia and fast reaction speed.
3. The operation and control are convenient, and a wide range of stepless speed regulation can be realized (the speed regulation range is 2000: 1).
4, can automatically realize overload protection.
5. The working medium is generally mineral oil, and the relatively moving surface can be lubricated by itself, with long service life.
6. It is easy to realize linear motion.
7. It is easy to realize the automation of the machine. When electro-hydraulic combined control is adopted, not only a high degree of automatic control process can be realized, but also remote control can be realized.
Extended data:
In a certain mechanical and electronic system, the hydraulic principle relies on the static pressure of liquid medium to complete the accumulation, transmission and amplification of energy, and realize the portability, scientificity and maximization of mechanical functions. Using hydraulic principle, hydraulic transmission system and hydraulic control system can be built. The basic function of hydraulic circuit is to transfer easily controlled energy in the form of liquid pressure energy.
1, the piston rod of the support rod must be installed downward, and it is not allowed to be inverted, which can reduce friction and ensure the best damping quality and buffering effect.
2. It is a high-pressure product, and it is forbidden to analyze, bake or touch it at will, and it shall not be used as an armrest. 3. Working environment temperature: -35℃-+70℃. (80℃ for specific manufacturing)
4. In the work, it should not be influenced by tilting force or lateral force.
5. Determine the installation position of the fulcrum. In order to ensure the accuracy of work, the piston rod of the pneumatic rod (gas spring) must be installed downwards, which can reduce friction and ensure the best damping quality and buffering effect. It must be installed in an accurate way, that is, when it is closed, let it move over the center line of the structure, otherwise, the door will often push open automatically. Before spraying and painting, install it in the required position.
References:
Support rod? Baidu baike