2013年7月30日星期二
MH electric hoist gantry crane structure features introduced
MH type electric hoist gantry crane for working-level A2-A5, working environment temperature -25-40 ℃, applicable from the weight of 3.2-12.5 t; span of 10-22 m, 2.5-5.5 m effective length of the cantilever, lifting height of 6-9 meters. In order to manipulate the main cab can also be manipulated using ground flashlight door. It is suitable for docks, garages, warehouses, construction sites, cement products and other field operations and small hydropower stations in open space for lifting and transport operations.
MH type electric hoist steel crane structural features:
MH type electric hoist gantry crane from the mast (main beam, legs and lower beams, etc.), electric hoist, crane operating agencies and electric control parts. These departments body are:
1 box-girder beam or an H-shaped steel beam, channel steel welding legs, lower beam channel steel welding or using box-shaped beams.
(2) with the introduction of electric hoist electric hoist technical standard AS or domestically developed H-type electric hoist, electric hoist hanging in the bottom flange on the main beam
3. MH electric hoist bridge gantry crane operation mechanism consists of motor, hydraulic coupling, hydraulic pusher brakes, gearbox and wheel components can also be used to run triple agency.
4. MH electric hoist gantry crane lifting, transverse, longitudinal limit switch protection or have a buffer device and a windproof folder track safety device.
2013年7月26日星期五
gantry crane calculation method: Section Method
gantry crane calculation method: Section Method
Winding calculation: Line frame by bending moment diagram chord distribution, the maximum span moment. Respectively, in the vertical plane and the horizontal plane is calculated. Beam weight allocated by node. Hoists and hoist gantry crane were acting cantilever end and cross, in order to focus. Dynamic load factor of K1 = 1.2, overload factor can take K2 = 1.25 (based on usage to determine whether to take the value). Vertical and horizontal axial force is calculated, and then the synthesis. Horizontal plane by the wind load and the load hoist horizontal force deflection combination.
overhead gantry crane manufacturers feel the level of force deflection hoists from 5 degrees yaw angle. Wind load frame and hanging by a line consisting of heavy windward side. Rated capacity 5 tons when: lifting the windward side is 8 meters. Lifting capacity 10 tons when: lifting the windward side is 10 square meters. Selected maximum axial force, for the calculation of the stability lever. Double angle should be considered in both directions. Allowable slenderness ratio: 120. Allowable stress (II load): 180Mpa.
Winding calculation: Line frame by bending moment diagram chord distribution, the maximum span moment. Respectively, in the vertical plane and the horizontal plane is calculated. Beam weight allocated by node. Hoists and hoist gantry crane were acting cantilever end and cross, in order to focus. Dynamic load factor of K1 = 1.2, overload factor can take K2 = 1.25 (based on usage to determine whether to take the value). Vertical and horizontal axial force is calculated, and then the synthesis. Horizontal plane by the wind load and the load hoist horizontal force deflection combination.
overhead gantry crane manufacturers feel the level of force deflection hoists from 5 degrees yaw angle. Wind load frame and hanging by a line consisting of heavy windward side. Rated capacity 5 tons when: lifting the windward side is 8 meters. Lifting capacity 10 tons when: lifting the windward side is 10 square meters. Selected maximum axial force, for the calculation of the stability lever. Double angle should be considered in both directions. Allowable slenderness ratio: 120. Allowable stress (II load): 180Mpa.
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