Abstract:

Mechanics and fatigue characteristics are important factors of the ropes rowed sling with sockets which affect the safe operation of telescopic arm of lifting machinery. A new cavity with wedge structure is designed based on the selection of 6×7+IWS wire rope and the whole 3D model of the rigging developed. By importing the model to Ansys-workbench platform, the finite element model is established. The degree of freedom in three directions is imposed to rigging’s pin at one end and loading the 100 MPa mass force at the other end as the boundary condition of the model. It is revealed that the inner cone angle is important which affects the mechanical properties of the rigging. The rigging can bear the maximum stress at least 342.17 MPa with 16° inner cone angle. As the inner cone angle changing in a certain range, the total deformation of the rigging is from 0.025 mm to 0.03 mm. The fatigue life of the ordinary lay wire rope can meet the requirement of the engineering crane, and it can be the preferred object.

Key words: ropes rowed sling with sockets; FEA; stress; deformation; lay direction; fatigue life