What's the Metso Barmac 840 STD/DTR Rotor?

Metso's Barmac 840 rotor is the most wear parts of the Barmac B7150se VSI crusher, commonly used in quarries and stone production plants. "840" refers to the rotor's outer diameter, or 840 mm. 

Function

The rotor's primary function is to accelerate the feed material and fling it against a fixed material bed ("rock-on-rock" anvils) or a surrounding feed bed. This high-speed impact crushes the rock along its natural fissures, producing high-quality cubic aggregate.

1. Material Acceleration: The raw material enters the crusher through the feed pipe and reaches the center of the rotating rotor.

2. Distribution and Ejection: The rotor's tip captures the material and ejects it outward at high speed through the rotor outlet.

3. Crushing Impact: The ejected material impacts the dense material layer accumulated on the surrounding feed ring and cascade rings, causing the material to break.

The "rotor" isn't a single component; it's a rotor assembly consisting of a rotor body and wear parts for Barmac B7150se vsi. Key components of the Barmac 840 rotor include:

Rotor body: The primary cast iron or steel structure that supports all other components. It serves as the backbone of the entire assembly.

Rotor tip (wear parts): These are replaceable tungsten carbide components bolted to the rotor body. They are the primary wear parts that directly contact and propel the feed material. They require periodic replacement.

Rotor outlet: The open passage between the rotor tips through which the accelerated material exits the rotor.

Shaft and bearings: The rotor assembly is mounted on a heavy shaft supported by large bearings for Metso Barmac B7150se vsi, enabling high-speed rotation (typically around 1,500-2,000 RPM).

When do wear parts need to be replaced?

Decreased output/capacity: The crusher is not processing as much material as before.

Poor product shape: An increase in flaky or elongated particles.

Excessive vibration: This may be due to uneven wear on the rotor tip tips, leading to imbalance. 

Increased operating noise

The following is a list of the main components of the Barmac 840 DTR and STD:

If you have any needs, you can contact us at any time.

All names, marks, models, symbols and descriptions are used for reference purposes only and it is not implied that any of the parts/brands listed are the product of any company other than ONA. We are not agents or distributors for any of the above mentioned brands nor do we have any commercial relationship or association with them.