VEM flexible vertical mills with integrated separator

Christian Pfeiffer ROPs use cylindrical roller bearings for sizes ≥ ROP-9-14 due to their lower weight and compact design. These bearings support lower manufacturing costs and efficient operation with oil circulation lubrication. This design maintains lower temperatures and extends bearing life, while the compact housing accommodates roller misalignments during operation.

The bearing housing compensates for roller misalignment with fixed and loose bearing housings that allow axial movement. This design uses the same bearing housing for all bearings, simplifying maintenance. The axial guidance system's innovative design ensures the rotary point is protected, maintaining alignment during pressure build-up and operation.

The grinding force in the ROP is managed by a hydro-pneumatic pressure system with hydraulic cylinders and nitrogen accumulators. The system adjusts pressure automatically based on material feed and nitrogen compression. This design allows easy maintenance, compensates for roller inclinations, and ensures proper alignment during operation.

Christian Pfeiffer's frame design focuses on reducing weight and enhancing user-friendliness. Open windows in the frame allow for quick checks of critical maintenance areas. Foundation elements enable easy connection with anchor bolts, eliminating the need for additional base frames.

The drive system, designed with a service factor of at least 2.0, includes a shrink disc, manual coupling, planetary gearboxes, and a cooling system. Safety features like a mechanical coupling with a tripping torque of 2.5 times the motor torque and a Cardan shaft ensure protection against overload and allow easy maintenance and disassembly.

The feed chute has dual slide gates to regulate material flow onto the rollers and control the feed near the grinding area. An integrated exhaust system manages grinding dust, preventing process variations and ensuring consistent operation.

The enclosed grinding area prevents dust and material from escaping. The housing absorbs roller movements and includes large doors for easy wear checks without disassembly. Sealed doors and windows prevent dust from accelerating wear on the guiding system.

A designated space next to the inlet chute allows for the installation of a welding apparatus for on-machine re-coating. This tool ensures an optimal welding angle, enabling effective maintenance and extending the roller surface's lifespan.