Gyratory Crusher Parts and Gyratory Crusher Animation
Changing mining and processing methods demand (besides new materials and design methods) a continual development of the products. SBM gyratory crushers represent today’s state of the art. They are designed for high performances at low operating and maintenance costs.
Gyratory Crusher Fields of Application
•Natural stone industry
•Ore mines
•Lime and cement works
•Coal preparation plant
Gyratory Crusher Working Principle
The main shaft (B) of the crusher is radially guided in the rolling contact bushing in the upper main shaft bearing (A) and in the inner eccentric bushing in the lower eccentric bearing (G). The thrust bearing assembly (J) arranged on the piston of the hydraulic cylinder (K) ensures the axial support of the main shaft.
The rotation of the drive motor is transmitted via the transmission gear (H) to the eccentric bushing in the eccentric bearing (G). This rotating eccentric bushing is responsible for generating the wobbling motion of the main shaft (B) – this wobbling motion is characteristic of cone crusher.
Consequently, the crushing gap change continuously between the stationary concaves in the gyratory crusher housing and the wobbling crushing cone.
The feed material that enters the crushing chamber from the top is continuously crushed between the crushing tools (C) as it falls by gravitation until it exits the crushing chamber at the bottom (F).
The crushing gap is adjusted by hydraulically lifting or lowering the main shaft.
This hydraulic main shaft adjustment is particularly used with abrasive feed material and frequent corrections of gap setting.
It also serves as overload protection when uncrushable foreign matter finds its way into the crushing chamber. Easy restart under load in an emergency due to hydraulic main shaft lifting and lowering.
Main shaft “jumping” under adverse crushing conditions is avoided by a pressurized hydraulic system ensuring permanent contact of the individual thrust bearing discs.
The use of a bevel gear set with cyclopalloid toothing allows the installation of drive motors with higher ratings, if required.
Gyratory Crusher Design
A. upper main shaft bearing assembly with two-armed spider ensures a spacious feed opening, automatic grease lubrication with electronic and visual level control
B. main shaft
C. crushing tools made of highly wear-resistant material
D. cast-steel shell sections, weight-optimized by means of FEA calculations
E. low-maintenance dust seal, highly efficient due to compressed air
F. large discharge openings owing to three-armed bottom shell
G. eccentric bearing assembly with replaceable inner eccentric bushing for stroke adjustment, integrated counterweight to minimize unbalances
H. transmission gear including a device for setting the tooth clearance, safe lubrication due to hermetically sealed stationary lubrication, electronic and visual oil level and temperature control optionally: vibration control
I. bevel gear and -pinion with cyclo-palloid toothing ensures smooth running
J. lower thrust bearing of the main shaft
K. hydraulic cylinder for convenient main shaft adjustment under load and overload protection in case of uncrushable foreign matter being fed to the crusher
Gyratory Crusher Design Characteristics
•Bevel gear with cyclo-palloid toothing
•Drive motors with higher ratings upon request
•Robust construction
•Possibility of direct feed
•No idle strokes due to continuous crushing
•High throughput rates
•Optimum crushing ratio
•Low fines content in the crushed material (if required)
•Low power requirement
•Change of stroke through adjustment of eccentricity
•Start under load possible (in an emergency)
•Different drive systems available
•Hydraulic main shaft adjustment and overload protection
•Low operating and maintenance costs.
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