D21220 spring Germany durovis model D21220 price

D21220 springs are helical springs that withstand compressive forces. The cross-section of the material used is mostly circular, but rectangular sections and multi-strand steel wires are also used. Springs generally have equal pitch. The shapes of compression springs include: cylindrical, conical, convex, concave, and a small number of non-circular shapes. There is a certain gap between the coils of the compression spring. When subjected to external loads, the spring contracts and deforms, storing strain energy. Compression springs provide resistance to external compressive loads. Compression springs are generally wound with metal wire at equal pitch and have a fixed wire diameter. Compression springs use multiple open coils to provide resistance to external loads (such as gravity pressing down on wheels, or body weight pressing on a mattress). That is, they push back to resist external pressure. Compression springs are generally wound with metal wire at equal pitch and have a fixed wire diameter. In addition, there are conical compression springs, or springs combining conical and straight sections. Depending on the application area, compression springs can be used to resist pressure and/or store energy. Round wire is the most commonly used for compression springs, but compression springs made from square, rectangular, and special-shaped wire are also available.

D21220 spring applications

Extension springs, also known as helical extension springs, generally have equal pitch and mostly circular cross-sections. They can be used in many occasions, such as production assembly, testing, R&D, and maintenance. Extension springs occupy an important position in the global market and are widely used in fields such as national defense, marine, computer, electronics, automotive, mold, medical, biochemical, aerospace, railway, nuclear power, wind power, thermal power, engineering machinery, mining machinery, construction machinery, and elevators.

D21220 spring features

1) Precise adjustment performance. That is, the relationship between force and displacement is very sensitive; 2) Good flexibility, meaning the deformation range is relatively wide; 3) Easy to manufacture; 4) Compact structure; 5) High energy utilization rate. Example characteristics: Conical helical springs have good buffering performance and can withstand large loads. Spiral torsion springs can store more energy and withstand larger loads, but the manufacturing process is more complex. The performance of concave helical springs is similar to that of conical helical springs, and they are mostly used in seat cushions and mattresses. The cross-sections of spring steel wire include circular and rectangular, with circular cross-sections being the most common. Helical springs, i.e., torsion springs, are springs that withstand torsional deformation, and their working part is also tightly wound into a helical shape. The end structure of torsion springs is processed into various shapes of torsion arms, rather than hooks. Torsion springs are commonly used in balancing mechanisms in machinery and are widely used in industrial production such as automobiles, machine tools, and electrical appliances.

D21220 spring functions and applications

1) Reset function: The spring deforms under external force, and after the external force is removed, the spring returns to its original state. Many tools and equipment use this property of springs for resetting. For example, many building door hinges are equipped with reset springs, so the door automatically resets after people enter or exit. People have also used this function to make products such as automatic umbrellas and automatic pencils, which are very convenient. In addition, various buttons and keys cannot do without reset springs. 2) Drive function: Mechanical clocks and wind-up toys are driven by tightening the mainspring. When the mainspring is tightened, it produces bending deformation and stores a certain amount of elastic potential energy. After release, the elastic potential energy is converted into kinetic energy, driving rotation through the transmission device. Toy guns, starting pistols, and military firearms also work using this property of springs. 3) Buffering function: Springs are installed between the frame and wheels of locomotives and automobiles, using the elasticity of the springs to reduce vehicle bumps. 4) Vibration and sound generation function: When air flows through the reed holes in harmonicas and accordions, it impacts the reeds, causing them to vibrate and produce sound.

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