low clearance/headroom overhead crane by Henan Mine Crane
Design Standard
Structure and Mechnical
The first part of the European society of material handling, heavy lifting equipment lifting mechanism design rules
Steel structure Manufacture
Welding standards: DIN8800 BLATT77
Crane design and construction standards: DIN5018 BLATT2
Welding level: DIN8563 BLATT3
Steel Structure Part
Girder with optimized design, light weight, reasonable structure;
The main girder of box beam or H beam structure, the steel plate welding forming;
Steel materials for domestic steel (Q235B);
Vertical round degrees according to China national standard;
All steel shot blasting pretreatment, achieve Sa2.5 level standards;
Carefully check and cleaned before welding steel plate, usually by the automatic welding machine for welding (MIG or semi-automatic welding)
Main weld NDT
End beam Part
Beam material for domestic steel 16 mn;
A beam of rectangular steel pipe or steel plate welding forming, forming the end of the beam in a positioning processing, CNC machine tools to allow deviation range, ensure dimensional accuracy and tolerance;
Each beam is equipped with a double flange wheels, buffer and anti cheat protection device;
Double beam crane along the direction of the main girder cart driver side arrangement maintenance platform (maintenance walkways);
Main girder and end beam adopts high strength bolt connection, ensure the machine precision and smooth operation.
Lifting mechanism
Structure (as shown in figure)
A brake motor + reducer +limit switch four unity integration design, compact structure.
Place the motor inside the large drum.
Lifting motor
Cage type, double pole changing winding country double speed motor
IP55 protection grade, F class insulation
ED by sustained rate 60%
Built-in thermistor overheating protection, optimization of air-cooled
Fully sealed in the drum
Electrical chassis stamping molding by the aluminum tube.
Reducer
Gear material for nickel chromium molybdenum alloy, antifriction bearing
CNC automatic gear machining center production, hard tooth face (HRC60), through grinding processing
Half a grease lubrication and maintenance free
Brake
Electromagnetic disc self-adjusting brakes, brake pads wear self-compensation, alarm when the thickness of the brake pad is not enough
Brake lining life: normal use not less than 1 million times, emergency braking is not lower than 500 times
Free maintenance
Often closed design, when the power is lifting mechanism in the braking state, to ensure safety
Dustproof design, non-asbestos friction plate
Frictional contact area is large, adjustable brake torque, good heat dissipation
Limit switch
CAM rotary limit switch
Four fully adjustable up and down limit position
Accurate phase sequence control
Slow down before stopping
Slow increase brake life and safety operation
Drum
Jumbo roll diameter, high strength zinc wire rope
Extend the service life of wire rope, the weight placed small offset
Rope clamp fixed, at least 2 circle wire rope is fixed
Bearing heavy system
Seamless steel tube is made, and work out the rope slot
Rope guide
For wire rope wear small, long life, toughness and good elasticity
High reliability and convenient disassembly
Even if the hook is dropped to the ground can also keep the wire rope tension
Coupling
Fe52 type coupling, materials
Hook
Hook group made of big diameter ductile iron pulleys and hook
Adopt anti-wear roller bearing
Hook can rotate 360 degrees
Equipped with spring pressure safety buckle can prevent slippage
Hook forging for quenched and tempered steel 34 crmov, basis DIN17200
Crane 、trolley traveling mechanism
Traveling Motor
Squirrel-cage frequency conversion motor
Stepless smooth operation, no crawling, start, shaking with speed to reduce weight
IP55 protection grade, F class insulation
Motor power 40% ED
The SEW company design, manufacture
Traveling ruducer
The triad structure
The hard tooth face (HRC60), through grinding processing
Half a grease lubrication and maintenance free
The SEW company design, manufacture
Wheels
42 crmo material: heavy wheels
Limit switch
One or two type (optional) electronic brake type limit switch
Slow increase brake life and safety operation
Walking in the direction of a trigger is at each end of the rod
With automatic reset function
Limit switches have a strong metal shell, the protection level of IP65