Supply 1-500-ton crane hook block

My company mainly produces 5-32 ton electric hoist hook group, the product is easy to install, reliable, stable operation for domestic electric hoist use, non-standard can be customized according to the user hook. ? Overview hook group hook group is the most common means extract, mainly by hook, pulley, the pulley shaft and bearing components. Co-operating with the hook group pulley fixed, fixed to the structure, composition pulleys. First, forging a single hook and a double hook to buy two kinds. General use 20,20MnSi overall forged steel. Single hook and double hook symmetrical beneficial discontinuity eccentric force, so small tonnage of 75 tons or less more than a single hook cranes, 75 tons more than the large-tonnage crane with double hook. This hook is widely used, it has become a system. In general, you do not have to calculate, the choice of press table. Wire Rope has decoupled danger, should set the hook. Second, Chip Chip hook hook single hook and double hook into two kinds. General overlap with C3 and 16Mn steel rivet into multiple pieces. This hook is simple, reliable, and easy maintenance. Single hook used for ladle crane, double hook and more for more than 100 tons of common cranes. Their structures have been family size, generally do not have to calculate, can be directly used. Third, rings rings than the forces favorable hook, from the same weight, its lighter weight, but not as good as the hook easy to use, so the rings using far less common hook. It is mainly used in the work tedious, since the weight of a large crane. The structure has a unitary and articulated two, the latter use more. ? Calculate the hook block a calculation to determine the load hook generally based on allowable stress strength calculation. The calculation load is: Q '= ψⅡQe [kg] where: Qe ---- nominal weight [kg]; ψⅡ ---- power factor. Hook is generally pre-sectional design, and then carry out checking. Second, forging a single hook Checking according to stress analysis, to make full use of hook material, and it has a relatively simple process into a trapezoidal cross-section. Sectional view taken generally the same as B-B and A-A in size, cross-section B-B has greater strength than A-A, and therefore the most dangerous section A-A.