As a specialised variant of coil springs, torsion springs achieve mechanical motion control by storing and releasing angular energy. They operate based on the torque generated by the elastic deformation of the material. When an external force causes the spring to rotate around its central axis, the coils undergo torsional deformation and accumulate potential energy. When the external force is removed, the spring returns to its initial position due to its restoring force. This unique torsional motion mechanism distinguishes torsion springs from compression springs, which undergo linear deformation, making torsion springs an ideal choice for applications requiring rotational force.
Core Design Parameters and Structural Features
1.Lever Arm Configurations: Includes straight-twist, hinged, and hook-end closure types. Free lever arm angles typically measure 90°, 180°, 270°, or 360°, with various closure methods adapting to installation requirements.
2.Material Selection: Commonly uses carbon steel, stainless steel, and alloy steel wire. Materials like 65Mn are widely adopted in industrial applications due to their high fatigue resistance.
3.Performance Adjustment: Precisely controls torque output and deformation by modifying wire diameter, outer diameter, coil count, and winding direction (clockwise/counterclockwise).
4.Special Structures:
Double-Twist Springs: Composed of left- and right-hand coils in parallel, delivering double the torque of a single spring for high-load applications.
Close-Coil/Spaced-Coil Design: Close-coil structures offer simpler manufacturing but higher friction, while spaced-coil designs reduce friction and enhance efficiency.
Typical Application Scenarios
1.Industrial machinery: Components requiring sustained rotational force, such as door hinges, garage door reset systems, and lever mechanisms.
2.Precision instruments: Power reserve mechanisms in watches and toys; miniature springs for space-constrained applications in electronic devices.
3.Historical vs. modern comparison: Ancient Greek catapults utilized horsehair torsion springs, while modern technology achieves greater precision and durability through material and structural optimization.
Key Considerations for Selection and Maintenance
1.Parameter Matching: Select the number of coils, wire diameter, and winding direction based on maximum torsional angle, torque requirements, and installation space.
2.Lifetime Assessment: Focus on material shear strength and Von Mises stress values to prevent failure due to plastic deformation.
3.Maintenance Recommendations: Regularly inspect wear at lever arm connections; lubricating spaced springs can reduce friction loss.
Hebei Jieti International Trade Co., Ltd.’s Technical Capabilities in Torsion Springs
Hebei Jieti International Trade Co., Ltd specialises in the manufacture of industrial springs, construction fasteners and other hardware products, supported by a stable supply chain system. Its torsion spring products offer the following core advantages:
Manufacturing experience: Years of expertise in spring production, a seasoned technical team, high daily output and support for customised solutions.
Process features: Utilisation of cold coiling technology with residual stress design to enhance fatigue life (torsion springs achieve up to one million cycles, extending to ten million cycles in specialised applications). It adheres to the ‘load in the direction of coiling’ principle, concentrating maximum stress on the compression side for enhanced safety.
Market Positioning: We focus on high-value industrial springs and offer both standard and customised solutions for machinery, construction and related sectors.
Torsion springs, with their high torque density and customizability, have become indispensable elastic components in mechanical design. From the leaf spring structures of compound bows to modern industrial precision equipment, their technological evolution continues to drive innovation in rotational force control solutions.
