Style and Structure overhead crane agencies

Drive mode crane operating agencies can be divided into two categories: one for the central drive, which uses an electric motor to drive the long drive shaft on both sides of Active Wheel; the other for each drive that active on both sides of each wheel with a single a motor drive. Medium and small more using a combination of overhead crane brakes, gear units and motors into one of the "triple play" drive mode, the large overhead crane lifting capacity of the ordinary for ease of installation and adjustment, the driving device often used universal coupling .
Cranes (crane) run institutions generally only four wheel drive and driven, if a great weight, increase common approach from the wheel to reduce the wheel pressure. When the wheels than four, must be balanced hinged frame means that the crane load is evenly distributed on each wheel.
Bridge metal structure from the main beam and side beams, divided into single girder bridge and two double-girder bridge. Single girder bridge by a single span girders and located on either side of the end beam composed by two double-girder bridge girders and end beam components.
Main beam and side beams rigidly connected at both ends of the end beam which wheels to run on an elevated bridge support. The main beam welded track for lifting the car running. The main beam of the bridge structure type more typical box-shaped structure, four truss structure and fasting truss structure.
Box-shaped structure can be divided into two-track box girder, double girder off-track box, off-track box single girder several. Double track box girder is a widely used basic form, the main beam from the vertical web of upper and lower flange plates and sides of the composition, the car rails disposed on the flange plate on the center line, simple structure, Manufacturing convenient, suitable for mass production, but larger self.
Partial rail box girder and double Partial rail box-section main beams are made of a single upper and lower flange plates and ranging in thickness consisting of primary and secondary webs, trolley rails disposed above the main web, cabinets of short stiffening board may be omitted, in which off-track box by a single girder box girder flange width instead of two main beam, the smaller the weight, but the manufacturing is more complex. Four truss structure a combination of four pieces of plane truss structure into a closed space, generally in a horizontal truss paved walkway surface plate, light weight, stiffness, but compared with other structures, size large, complex manufacturing, fatigue lower intensity, has less production.
Partial fasting truss structure similar rail box girder, a closed structure consists of four steel plates composed of, in addition to the primary web is solid web-shaped beam, but the remaining three steel plates in accordance with the design requirements into many windows form a non-inclined pole fasting trusses, the upper and lower surfaces of the horizontal truss plate lined with walkways, crane operation mechanism and electrical equipment installed in the bridge inside, lighter weight, the overall stiffness, which is a type widely used in China.
Common bridge crane mainly electric drive, usually operated in the cab, there are remote control. From the weight of up to 500 tons, span up to 60 meters.
Easy-beam bridge cranes, also known as crane beam, its structure and composition is similar to ordinary bridge crane, from the weight, span and work rate are small. Bridge the main beam is a simple cross-section beam by a beam or other beam and plate steel composition, hand pull hoist or trolley hoist coupled simple as lifting the car, the car generally runs on the lower flange I-beams. Can bridge the orbiting overhead, but also suspended in underpasses along the orbit, which is called the crane girder suspension cranes.
ladle bridge crane in the steel production process can participate in a particular process operation, its basic structure and general overhead crane similar, but lifting a small car is also equipped with special work mechanism or device. Working features of this crane is the use of frequent, harsh conditions, high operating levels.