German durel springs durel models durel prices

durel springs, as elastic elements, are widely used in the suspensions of modern automobiles, including passenger cars, trucks, and off-road vehicles. Compared to leaf springs, torsion bar springs offer a series of advantages: high energy storage per unit mass, which reduces vehicle weight and saves material; since the torsion bar spring is fixed to the chassis, it reduces unsprung mass, improving ride smoothness; when applied to the front suspension of front-wheel-drive vehicles, the torsion bar spring can be arranged longitudinally, leaving space for the oscillating half-shafts of the front drive axle. However, torsion bar manufacturing costs are relatively high, with strict requirements for materials and processes. Furthermore, torsion bar springs serve only as elastic elements and require a guiding mechanism. Torsion bar springs are made of chrome-vanadium alloy spring steel, with a very smooth surface after machining. The surface of the torsion bar must be well protected during use; typically, a layer of epoxy resin is applied to the surface of the torsion bar spring, wrapped with a layer of fiberglass cloth, coated with another layer of epoxy resin, and finally coated with asphalt and anti-rust paint to prevent collision, scratching, and corrosion, thereby extending the service life of the torsion bar spring.

durel spring applications

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

durel spring classification

1) Torsion springs: Torsion springs (torsional springs) utilize the principle of leverage, twisting or rotating elastic materials with softness and high toughness to store significant mechanical energy. These are springs that withstand torsional deformation, with working coils either closely wound or spaced apart. The end structures of torsion springs are processed into various shapes of torsion arms, ranging from single torsion to double torsion, and even various torsion bar deformations, formed according to design requirements. Torsion springs are commonly used in balancing mechanisms in machinery and are widely applied in industrial production such as automobiles, machine tools, and electrical appliances. 2) Compression springs: Compression springs are helical springs that withstand axial pressure. Springs are generally divided into uniform-pitch springs and variable-pitch springs. Shapes of compression springs include cylindrical, conical, convex, concave, and a small number of non-circular forms. There is a certain gap between the coils of compression springs; when subjected to external loads, the spring contracts and deforms, storing deformation energy. Variable-pitch springs are becoming increasingly common, no longer limited to uniform-pitch springs, allowing them to perform different roles in various environments. 3) Carbon nanotube springs: Carbon nanotube springs can have diameters up to hundreds of micrometers and lengths up to several centimeters. Their spun structure has broad application prospects, potentially applicable in stretchable conductors, flexible electrodes, micro strain sensors, supercapacitors, integrated circuits, solar cells, field emission sources, and energy dissipation fibers, providing the possibility of preparing visually visible carbon nanotube electronic devices. They are also expected to be used in medical devices, such as tension-sensing bandages. This new structure can also be developed into multifunctional carbon nanotube fiber composites for utilization. 4) Extension springs: Extension springs (tension springs) are helical springs that withstand axial tensile force. Extension springs are generally manufactured using round cross-section materials. When not under load, the coils of extension springs are usually tightly closed with no gap. They work by utilizing the rebound force (tensile force) after extension, used to control component movement, store energy, measure force magnitude, etc., and are widely used in machines and instruments. Hook forms include side-hook extension springs, long-hook extension springs, British-hook extension springs, German-hook extension springs, semi-circular hook extension springs, duck-bill hook extension springs, etc. Materials include stainless steel, music wire, high-carbon steel, phosphor bronze, beryllium copper, and oil-tempered alloy spring steel. 5) Air springs: Air springs are non-metallic springs that achieve elastic action by adding pressurized air into a flexible sealed container, utilizing the compressibility of air. They can be roughly divided into bladder type and diaphragm type. Air springs have excellent elastic characteristics; when used in the suspension systems of high-end vehicles, they can significantly improve vehicle ride smoothness, thereby greatly enhancing driving comfort. Therefore, air springs are widely used in automobiles and railway locomotives. Additionally, due to their many advantages over ordinary steel springs, they are also applied in some mechanical equipment and precision instruments.

durel spring applications

To a large extent, disc springs are replacing cylindrical helical springs. They are commonly used in heavy machinery (such as presses) and weapons like artillery and aircraft as strong buffering and vibration-damping springs, as clamping springs for automobile and tractor clutches and safety valves, and as energy storage elements for mobile equipment. Disadvantage: Load deviation is difficult to guarantee. Disc springs can be divided into three categories based on cross-sectional shape: standard disc springs (rectangular cross-section), disc springs with radial grooves, and trapezoidal cross-section disc springs. Standard disc springs are divided into those with support surfaces and those without; disc springs with radial grooves are based on standard disc springs, with several uniformly distributed slots cut radially, either from the inner hole outward or from the outer circle inward; trapezoidal cross-section disc springs are divided into those with inner edge thickness greater than outer edge thickness and those with inner edge thickness less than outer edge thickness. Since the deformation and load values of single disc springs often fail to meet usage requirements, they can be used in groups to form disc spring assemblies (columns). Typical combinations include: stacked combination disc springs, composite combination disc springs, and other combination disc springs. Compared to cylindrical helical springs, disc springs have the following characteristics: 1) The load-deformation characteristic curve exhibits a nonlinear relationship. 2) Disc springs are thin-sheet shaped, easy to form assemblies, allowing modular assembly and replacement, thus facilitating maintenance. 3) Disc springs with radial slots exhibit zero stiffness characteristics. This characteristic can be applied in situations where spring force is required to remain basically stable within a certain deformation range. 4) The vibration absorption performance of disc springs is no less than that of cylindrical helical springs; when using stacked combinations, friction between disc spring sheets provides greater damping, dissipating impact energy.

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