Table of Contents
- 1 How is EOT crane capacity calculated?
- 2 What is LT and CT in EOT crane?
- 3 What’s the best way to find a load capacity of a crane?
- 4 What is SWL in EOT crane?
- 5 What does a 500 ton crane mean?
- 6 How much power is needed to lift a weight?
- 7 What kind of motor does an EOT crane use?
- 8 How many wheels are on an overhead crane?
How is EOT crane capacity calculated?
The crane wheel load, usually referred to as maximum wheel load is the total load in pounds that any single crane wheel will see. The formula for determining… MWL is Bridge weight / 2 + {Live load (crane capacity + hoist weight) x 15%impact*)/ Number of wheels on a single end truck.
What is LT and CT in EOT crane?
LT motion : Long Travel Motion. CT motion : Cross Travel Motion. Bridge : the structural portion on which the trolley/crab moves. LT End carriage : Structure which houses Long Travel Wheels. CT End carriage : Structure which houses Cross Travel Wheels.
How is a crane rated?
In general, a cranes tonnage rating is determined by how much weight it can pick approximately 5′ away from it’s center pin. But as you go further away from that point the capacity of the crane decreases. Additionally, the higher you have to lift a piece, the more boom must be pushed out, also reducing capacity.
How is hoist power calculated?
Hoist motor power is calculated by:
- P = M.g.v/n.
- M = Mass.
- g = Gravity.
- v = velocity of raise mption.
- n (meant to be the greek letter nu) = efficiency losses due to gears/ pulleys.
What’s the best way to find a load capacity of a crane?
Measure geometric components
- The standard calculation for maximum crane capacity is (r)(hC)/100.
- R = Radius between the ground and load.
- hC = Lifting height multiplied by the capacity.
What is SWL in EOT crane?
In Australia the use of Safe Working Load (SWL) for cranes, hoists and winches was universally used throughout all industries and referenced in legislation and the Australian Standards. The Wikipedia definition of SWL is: Australian Standard 1418.1 Cranes, Hoists and Winches details the requirements for cranes.
What is crab in EOT crane?
The Crab includes the hoisting machinery placed on a frame, which is in turn fixed on at least four wheels and consists of suitable machinery for traversing the Crab to and fro motion along the main bridge girders of the crane. The crab wheels operate on two rail sections mounted on the top flange of the main bridge.
What is the strongest crane in the world?
Taisun crane
Holding the record for the top 3 heaviest lifts; the Taisun crane in China is the strongest crane that exists in the world today. With a working load limit of over 44 million pounds or 20,000 metric tons this crane is surely a modern marvel.
What does a 500 ton crane mean?
About the 500-Ton Crane With the largest reach, radius, and lift capacity of any mobile crane, the 500-ton crane has the potential to add value to any company seeking large-scale hoisting services. The crane has a lifting radius of 100 metres and the load capacity maxes out at 400 tons.
How much power is needed to lift a weight?
Lifting Weights: On earth it takes about 10 Newton-meters (N-m) of energy to raise a 1 kilogram mass to a height of 1 meter. Since 1 N-m equals 1 Joule, that’s 10 Joules. If it takes 1 second to lift the weight 1 meter, than you have converted 10 Joules of energy to potential energy in one second.
Which motor is used in EOT crane?
slip ring induction motor
The slip ring induction motor is connected to power resistance in 4 to 5 steps by power contactors.
What does Lt mean on an overhead crane?
LT wheel Base : Distance between center of extreme LT wheels along the runway rail. LT wheel gauge : also equals to span – distance between center of LT wheels along bridge girder Ct Wheel Base : Distance between center of extreme CT wheels along the runway rail.
What kind of motor does an EOT crane use?
The applicaton I use is a EOT crane with a magnet. It loads steel scrap into a ladle which goes into a electric arc furnace. Motor use in eot crane?
How many wheels are on an overhead crane?
Drive girder : The girder which has LT Driving Wheels, usually also has the main panel mounted on it, along with a platform 8 wheel configuration : normally there are total 4 nos of LT wheels. However when the crane capacity increases the no of LT wheels needs to be increased.
How to calculate motor power for an overhead crane?
The standards applicable are BS466 (Electrical) and BS2573 (Pt 1 and 2 – Mechanical). All the info provided in earlier answers covers this. Dimensionally, this works out as P (Watts, or Joules/sec, or Force*velocity) in kg.m