mining stone crusher unit mainframe

The mainframe of a mining stone crusher unit is the core structural component that houses the crushing mechanism, bearings, and other critical parts. It provides stability, durability, and support to the entire crushing system. Below are the key aspects of a stone crusher unit’s mainframe:

1. Components of the Mainframe
– Base Frame: Heavy-duty steel construction to withstand vibrations and load.
– Side Plates/Frames: Reinforced steel plates to support moving parts (e.g., jaw plates, hammers).
– Bearing Housings: Holds bearings for shafts (e.g., eccentric shaft in jaw crushers).
– Crushing Chamber: Encloses the crushing mechanism (jaws, hammers, or cones).
– Flywheel Mounting Points: For balancing rotational forces (in jaw/impact crushers).
– Adjustment Mechanism: Allows setting changes (e.g., CSS—Closed Side Setting in jaw crushers).

2. Types of Crushers & Their Mainframes
– Jaw Crusher:
– Robust cast steel or welded frame.
– Fixed and movable jaw plates bolted onto the frame.
– Eccentric shaft mounted on heavy-duty bearings.

– Cone Crusher:
– Upper/lower frames with a mantle and concave.
– Hydraulic cylinders for adjustment and overload protection.

– Impact Crusher (HSI/VSI):
– Welded steel housing with rotor assembly.
– Replaceable wear liners inside the crushing chamber.

– Hammer Crusher:
– Heavy-duty steel casing with a rotor and hammers.

mining stone crusher unit mainframe 3. Material & Durability
– Made from high-grade steel (ASTM A36, Hardox, or Manganese Steel).
– Reinforced with ribs/gussets to prevent deformation under load.
– Coated with anti-abrasive liners where necessary (e.g., AR400 steel).

4. Maintenance Considerations
– Regular inspection for cracks/wear in welds and plates.
– Lubrication of bearings to prevent overheating/failure.
– Bolt tightening to avoid loosening due to vibrations.