How does a friction winder work?
Frictional engagement between the rope grooves and the ropes transmits the movement of the traction sheave to the ropes and limits the winder’s traction capacity of the transmitted overload. The conveyances are subsequently moved reciprocally up and down the shaft.
What is Koepe winding?
A system where the winding drum is replaced by a large wheel or sheave. The Koepe sheave may be mounted on the ground adjacent to the headgear or in a tower over the shaft. The drive to the rope is the frictional resistance between the rope and the sheave.
What is friction winding?
Friction winding is used to compensate diameter differences at multi-web winding on one common winding shaft. When such a film is slit into several single webs and wound on one common shaft, different diameters of each wound reel will be the result.
What is a winder in mining?
Industrial rock winders on mines are used to hoist skips which contain reef or waste rock from the different underground mining levels to the surface. The basic operation of a rock winder system is to transport reef and waste from the different underground mining levels to the surface.
How is shaft mining done?
Shaft mining is the process where miners dig straight down, or almost straight down, until they reach their desired depth. Then the mine begins to branch out in all directions. Miners will enter or exit a mine through a lift or elevator installed where the initial vertical tunnel was originally.
What is the function of a mining headgear?
The primary purpose of a Headgear is to support the sheave wheels, on which the winding ropes run. The ropes are coiled (stored) on ground mounted drum winders, situated in the winder house, at a distance away from the Headgear.
Which are the types of winding system?
Types of winding machine
- Coil winding machine.
- Film winding machine.
- Rope winding machine.
- Paper winding machine.
- Foil winding machine.
- Roll slitting machines.
- spool winding machine.
- cop winding machine.
What is a friction hoist?
Friction hoist Friction hoists are mounted on the ground above the mine shaft, or at the top of the headframe. Friction hoists utilize tail ropes and counterweights and do not have the haulage rope fixed to the wheel, but instead passed around it.
Which rope is used in drum winding?
Round Wire Rope: The most important attribute for a winding rope is the ability to withstand, without permanent deformation, repeated bending under stress such as when the rope is wound over the head sheave or on the drum.
What does a counterweight do for a mine winding system?
A counterweight is a weight that, by applying an opposite force, provides balance and stability of a mechanical system. The purpose of a counterweight is to make lifting the load faster and more efficient, which saves energy and is less taxing on the lifting machine.
What is shaft mining in simple words?
Shaft mining or shaft sinking is excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom. When the top of the excavation is the ground surface, it is referred to as a shaft; when the top of the excavation is underground, it is called a winze or a sub-shaft.
What is involved in preparing a Koepe Winder for Operation?
Brief descriptions are given of the work involved in preparing a busy operating shaft to receive its planned Koepe winder. The more important features of the operation are detailed, including the headgear arrestor gear, the tail rope loop protection, and the loading box. Brief details of the conveyances are given.
What are the benefits of Koepe rope handling?
•Safe and efficient rope handling is often overlooked that is key to the full realization of the benefits associated with Koepe winders •Rope handling is a very complex activity in which the adopted methodology (design stage) will materially effect the safety and productivity of the mine’s operation PRIMARY EQUIPMENT COMPONENTS •Friction Winch
Can the conveyance be detached from the winding ropes?
Conveyances operated by the Koepe system cannot be detached from the winding ropes in the event of an overwind. It is, therefore, necessary to introduce a method of arresting the upper and lower conveyances and with them the moving rope system.
How many trips can a winder make in a day?
The men and material winder could only achieve an average of about 310 trips per day, due to the multiple clutching operations necessary to serve eight main stations with sufficient men and material to provide the abovementioned tonnage.