Friction hoists
Friction hoists are designed for rock hoisting, quick and safe hoisting people, transportation of timber , mining equipment and materials. Inspection and repair of shaft reinforcement and lining is also performed by means of mine hoists.
Friction hoists are divided according to loading level of head ropes by the action of end force on the mine hoist. There are single-rope and multi-rope (up to eight ropes of carrying set) hoists which can be equipped both with geared and gearless drives.
To hoist heavy loads from deep mines by means of bucket, cage and single conveyance counterweight hoisting, multi-rope mine hoists are mainly used. Single-rope friction hoists are notable for compact design and narrow width. These hoists, however, are not used in mine construction, but only in some auxiliary hoists of operating mines.
Friction hoists are located directly above the mine shaft, on tower headframe (of MR type (multi-rope)) or installed in surface building at a certain distance from the shaft (CGP type hoists (cylindrical ground pulleys)). Сircuit design and layout of mine hoists of various standard sizes of CP-series are identical to MR-series hoists, but the design of their units is more perfect. Multi-rope mine hoists of MR-series are equipped with spring loaded pneumatic brake. CP-series hoists are equipped with hydraulic disc brakes.
Multi-rope hoists can be equipped with one and two engines (depending on selection of the mine hoist and calculations performed) and two types of brakes: radial shoe or hydraulic disc ones.
WE CONSIDER MANUFACTURING OF ANY STANDARD SIZES, VERSIONS OF HOISTS OF THIS TYPE.
| Technical characteristics | CShN 5Х4 un | 5х6 nb | 5х8 gv | 4х4 nb | 3,25х4 кn |
|---|---|---|---|---|---|
| Location of equipment | Surface | Surface | Headframe | Surface | Surface |
| Type of winding tool | КVSh | КVSh | КVSh | КVSh | КVSh |
| Diameter of winding tool ,mm | 5000 | 5000 | 5000 | 4000 | 3250 |
| Number of ropes | 4 | 6 | 8 | 4 | 4 |
| Capacity, tn | 25 | 40 | 50 | 15 | 10 |
| Max. hoisting velocity, m/s | 12 | 16,5 | 16,5 | 12 | 9,4 |
| Motor power, кW | 2х1600 | 2х4000 | 2х5500 | 1600 | 1000 |
| Hoist height, m | 1538 | 1032 | 1375 | 1070 | 1130 |
| Brakes type | Hydraulic disc | ||||
Design
The process of mine hoists design starts with study and verification of initial technical requirements submitted by a customer. Uralmashplant engineering center is equipped with modern software, which allows us to reduce the cycle of mine hoists design and increase the efficiency and quality of the design.
The next stage is the calculation of loads on mine hoist mechanical equipment, drives and brakes. We pay particular attention to this process. The specialists of engineering calculations and analysis center perform calculations for static, dynamic and fatigue strength of mine hoists equipment, by means of modern software platforms, using finite element method. Engineering calculations allow us to simulate processes and operation and identify the areas of maximum stresses, fatigue limit of a part, predict the service life of mine hoists.
Production
Mine hoists parts are domestically manufactured by Uralmashplant, including the use of the advanced machining centers by leading global manufacturers. The materials used for manufacturing of main units and parts of mine hoists are similar or surpass the known analogues. Every part of mine hoist is controlled at all stages of designing and manufacturing. We use a number of original designs and process solutions in сourse of manufacturing of our structures.
Testing
We test all manufactured mine hoists at a specialized workbench with the participation of representatives of customer company in compliance with the developed program and methodology.
Traction sheave made of welded structure.
The sheave consists of two halves fastened with high-strength fasteners
Headframe sheave
Traction sheave assembled with shaft
Main shaft
Made of forging
Traction sheave assembly
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Rock discharge hopper
Electric motor of traction sheave drive
Cage
Production and operation statistics
Manufactured
In operation
Manufactured since 2017
| Company | Quantity | Version | Conveyance type | Location | Year of putting into operation |
|---|---|---|---|---|---|
| “Gaiskiy GOК” PJSC (UMMC) | 1 | 5х8 гв | Skip | Headframe | 2019 |
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