The principal parts of overhead traveling cranes are:
bridge girders, end trucks, trolley with hoisting mechanism, an operator’s cab or pendant control
. Careful repair and maintenance are essential to safe crane operations.
What are the components of a crane?
- Hook. The hook element of a crane is the part that holds or carries the load and connects it to the hoisting element. …
- Hoist. The hoist element of a crane provides the vertical lifting and lowering power. …
- Trolley. …
- Bridge.
What are the major components of a typical overhead crane system?
- Bridge Crane: The bridge is built as a single or double, beam or box girder which traverses and down the runway. …
- Hoist and Trolley: The hoist lifts your load up and down while it traverses across the bridge.
What is the purpose of a overhead crane?
To move extremely heavy or bulky loads through the overhead space in a facility
, instead of through aisles or on the floor, an overhead crane (also called an industrial crane, crane, or overhead traveling crane is a machine that lifts, lowers and moves a load horizontally.
How does an overhead crane work?
Overhead cranes
cover a rectangular area, moving a load side to side and backward and forward
. They typically incorporate a top running trolley hoist which moves along the top of the two bridge beams on its own set of wheels for increased headroom under the crane; also called a top running crane.
What is the boom on a crane?
A crane boom is
a long fixed or hydraulic arm that is used to move large objects in construction
. It bears most of the weight when positioning a load, and its length determines a crane’s maximum reach. Crane booms take on a variety of roles and appearances depending on the type of crane.
How much does an overhead crane cost?
Jib Crane: Anywhere
from $500 – $25,000
There are many different types of jib cranes, including: Free-standing. Workstation (typically lighter capacity) Structural (can be designed up to 10-ton capacity)
What are the three functions of a crane?
A crane is a type of machine, generally equipped with a hoist rope, wire ropes or chains, and sheaves, that can be used both to
lift and lower materials and to move them horizontally
. It is mainly used for lifting heavy things and transporting them to other places.
How many types of EOT crane are there?
There are mainly
two types
of EOT cranes- single girder EOT and double girder EOT.
What is EOT crane full form?
Electric overhead traveling crane
or EOT crane is one of the most common types of overhead crane, also called bridge cranes, which consist of parallel runways with a traveling bridge spanning the gap. EOT cranes are normally powered by electricity.
What are the hazards in crane lifting?
- Crane tipping over.
- Load hitting any plant facility.
- Falling of load from heights.
- Injury from crane machinery.
- Exposure to excess heat.
- Exposure to vibration.
- Asphyxiation in confined space.
- Unskilled manpower.
How do you maintain an overhead crane?
Ensure there are no loose, broken, or damaged parts on the hoist, trolley, bridge, runway, or electric systems. Check that the
wire rope is reeved
and seated in the drum grooves properly. Verify that the bottom block is not twisted (no two lengths of wire rope should touch).
What are the different types of overhead cranes?
Choosing the right overhead crane can make work much easier. Choosing the wrong one, not so much. The different types of overhead cranes include
gantry cranes, jib cranes, bridge cranes, workstation cranes, monorail cranes, top-running, and under-running.
Which motor is used in overhead crane?
Conventional AC operated crane drives use
slip ring induction motor
whose rotor windings are connected to power resistance in 4 to 5 steps by power contactors.
What is the problem of a crane?
If overhead crane is out of alignment and skewing then it can lead to significant stress and damage to whole crane system. While construction of the crane, forces applied can also cause stress in the crane and hence this type of stress can result in accidents, crane failure,
productivity loss and replacement of loss
.
What is the difference between a crane and a hoist?
A stationary hook-mounted hoist is a simple solution when you only need to move a load straight up, such as from a truck to a trailer. Meanwhile, a hoist bolted to a beam will handle heavier loads. to
lift up
then across the facility. Gantry cranes give you three-dimensional motion.
