Design of crane on column with electric steel

Contents 1 Load lifting mechanism with electric drive.............. 4 1.1 We select rational load suspension scheme, we draw it, we define frequency rate polyspasts, its efficiency and to calculate the greatest effort in a driving branch of a rope............................. 4 1.2 Raschityvayem also we choose explosive effort of a rope................ We Choose 4 1.3 in accordance with GOST 6627 - 74 cargo hook......................5 1.4 we Determine diameter and the main sizes of the block and a drum.............................................................................5 1.5 Check of a drum on durability and to calculate attachment parts........................................................................... 6 1.6 we Will determine the frequency of rotation of the drum.............................. 7 1.7 we Determine power, necessary for load lifting......... 8 1.8 we Select the electric motor and we check it on the starting moment..............................................................................8 1.9 we Choose tal electric in accordance with GOST 22584 - 96..............9 1.10 Installation of a brake is made on high-speed to a shaft.............9 1.11 we Select a brake for normals and we make its test calculations for heating.................................................................11 2. The mechanism of movement 2.1 At symmetric location of wheels (zk = 4) concerning an axis of a suspension of load of a wheel...............................................11 2.2 Resistance to movement a waist..................................11 2.3 Necessary power of electric motor.........................11 2.4 Normal functioning without slipping is ensured at number of wheels of zv = 2, i.e. the condition........................................12 2.5 Time of braking.......................................................12 2.6 Transfer number of the mechanism of drive............................12 3 is carried out. Calculation of an arrow on durability.............................................13 the Bibliography................................................. 14