Archimedes said: "Give me a fulcrum and I can pry the whole earth" According to this principle, household tools such as spring scissors appeared. According to the principle of leverage, mankind first tasted the benefits of labor-saving and convenience. The emergence of gas springs has elevated mankind's labor-saving advantage to a new level. The use of its springs has also become widespread, and in the opinion of engineering and construction employees, gas springs are the best labor-saving tool. The types and styles of gas springs are different, but their application principles are the same. When using gas springs, you need to understand the gas spring installation methods and precautions. Follow me to learn about gas spring installation and other related knowledge.
Gas Spring Structure
Gas struts is actually a layman's term, we are accustomed to the industry called struts, gas springs, and gas struts just by his own function and structure by the other industry people commonly known as struts, struts, the use of the current point of view, a very wide range of automobile and motorcycle industry, mechanical industry, the electronics industry to transportation, fitness and sports, medical equipment, everywhere, the use of gas struts, the use of gas struts, the use of gas struts and the use of gas struts. Fitness sports, medical equipment, ubiquitous, and many manufacturers and staff do not know much about his installation, gas spring is an advantage of simple installation.
Gas springs generally have connections at both ends, and the specifications of the connectors are many, but have his characteristics, generally screws, nuts, or directly to the wire teeth, that your equipment should be in line with his size of the wire holes, the main thing is that the gas spring up and down the installation of the piston rod must be down, up the cylinder, so that in line with the working principle of the gas spring. Pneumatic damping groove, with which a gradual resistance can be generated, in order to make the hydraulic rod slowly expand and contract. Do this damping groove need special equipment, generally only professional pneumatic rod factory can process.
Principle of gas spring
The principle is that in a closed pressure cylinder filled with an inert gas or oil-gas mixture, so that the pressure in the chamber is higher than the atmospheric pressure of a few times or dozens of times, the use of the cross-sectional area of the rod is smaller than that of the piston so as to produce the pressure difference to achieve the movement of the piston rod.
Because of the fundamental difference in principle, gas springs have significant advantages over ordinary springs: relatively slow, dynamic force changes (generally within 1:1.2), easy to control; the disadvantage is that the relative volume is not as small as the coil spring, high cost, relatively short life. Unlike mechanical springs, gas springs have a nearly linear elasticity curve. The elasticity coefficient X of the standard gas spring is between 1.2 and 1.4, and other parameters can be flexibly defined according to the requirements and working conditions.
Depending on their characteristics and areas of application, gas springs are also known as support rods, gas supports, adjusters, pneumatic rods, dampers, and so on. According to the structure and function of the gas spring to categorize, the gas spring has a free-type gas spring, self-locking gas spring, traction gas spring, random stop gas spring, swivel chair gas spring, gas pressure bar, damper and several other types. At present, the product has a wide range of applications in automotive, aviation, medical equipment, furniture, machinery manufacturing and other fields.
Classification of gas springs
First, the free-type gas spring (support rod) is the most widely used gas spring. It mainly plays a supporting role, only the shortest, longest two positions, in the stroke can not stop by itself. In the automobile, textile machinery, printing equipment, office equipment, construction machinery and other industries are most widely used. Free type gas spring with its lightweight, smooth work, easy to operate, price concessions, etc., in the automotive, engineering machinery, printing machinery, textile equipment and other industries such as the wide range of applications.
Second, self-locking gas spring: the most common application in medical equipment. This kind of gas spring with the help of some release mechanism can stop at any position in the stroke, and stop after a large locking force.
Third, stop at will gas spring is mainly used in kitchen furniture, medical equipment and other fields.
Its characteristics are between the free type gas spring and self-locking type gas spring: does not require any external structure and can be stopped at any position in the stroke, but there is no additional locking force. The effect is mainly achieved by means of a controller (handle or pull wire). It can also be achieved by telescoping the piston rod. When stopped when adjusted in the desired position with a controller, the valve closes independently and the piston rod locks in the required position. When locking occurs, locking can be realized. However, if the locking force is exceeded, the locking function will no longer be effective.
Fourth, the swivel chair gas spring is mainly used in swivel chairs, the role of adjusting the position.
Characterized by its controllable, the demand is relatively large.
Fifth, traction gas spring is a special kind of gas spring: other gas springs in the free state are in the longest position, that is, after being subjected to external forces from the longest position to the shortest.
Gas Spring Models
China's spring standardization work began in the early 1960s, so far has been more than 40 years of history, has formed a relatively perfect standard system, there are 22 national standards for springs, industry standards 30. 1999 by the State Administration of Quality Supervision, Inspection and Quarantine approved the establishment of the National Spring Standardization Technical Committee (SAC/TC). (SAC/TC235), spring standardization work to be comprehensively promoted. 2004, the international establishment of ISO/TC 227 (spring), our country to participate in the work of the membership, which marks the spring standardization work in China has entered a new stage, that is; comprehensive tracking, substantive participation in the work of the stage.
GB/T 1239.2-1989 Cold wound cylindrical helical compression springs Technical conditions, GB/T 1239.3-1989 Cold wound cylindrical helical torsion springs Technical conditions, GB/T 1239.4-1989 Hot wound cylindrical helical springs Technical conditions, GB/T 1239.6-1989 Cylindrical helical springs Design calculation.
Installation of gas springs
1. The position of the piston rod of the compression gas spring must be downward when it is installed, so as to reduce friction and ensure the best quality of damping and buffering performance.
2. When installing the compression gas spring, it must be installed in the right way so that it moves past the centerline when closed, otherwise it will often push the door open.
Gas Spring Installation Precautions
1. The selection of the gas spring, before determining the installation location, should first be in the instruction manual of the model and specifications.
2. The gas spring should not be subjected to tilting force or lateral force in the work.
3. The piston rod is not painted, nor is it permissible to spray or paint the gas spring after first installing it in the desired position.
4. Gas springs are high pressure products, do not dissect them.
5. Gas springs are not allowed to be baked, smashed or touched.
6. Gas spring piston rod, do not rotate to the left
Editor's summary: gas spring (gasspring) is a kind of support, buffer, braking, height adjustment and angle adjustment and other functions of the accessories. At present, the product is widely used in medical equipment, automobile, furniture, textile equipment, processing industry and other fields.