The design and manufacture of chain trenchers begins by determining their structural and kinematic parameters based on construction requirements. Kinematic and dynamic analyses are then performed on the trenching device, and empirical formulas are used to calculate the resistance experienced by the chain cutters when cutting the soil. Based on this, the structural design of key components of the trenching device is carried out. With technological advancements, the design of modern chain trenchers also emphasizes improved automation and adaptability. For example, by adding a lifting and positioning mechanism, the chain cutters can be adjusted vertically, improving the automation level and adaptability to different working environments.
During the design process, large-scale 3D modeling software such as UG and Solidworks are used to complete the 3D modeling and assembly of the main components, ensuring that no interference occurs between the components. Subsequently, finite element analysis software such as ANSYS Workbench is used for linear static structural analysis to verify strength and stiffness, and modal analysis and harmonic response analysis are performed to ensure that the operating frequency avoids the structure's natural frequency and prevents resonance. Furthermore, software such as ADAMS can be used to analyze the dynamic characteristics of the trenching device, studying the changes in angular velocity, angular acceleration, and force on the driving sprocket, driven sprocket, and tension sprocket during operation to verify the stability of the transmission system.
To verify the design, a digital indoor trench test was conducted to test the cutting resistance of the chain cutter at different cutting speeds, verifying the theoretical calculation results and providing a basis for design optimization.
