What is the function of accumulated material in the crushing chamber of a vertical impact crusher

The rotor is the core component of a vertical impact crusher, where materials are primarily crushed and shaped. In actual production, material accumulation on the rotor is a normal phenomenon. However, the amount of accumulated material must be appropriate; excessive or insufficient accumulation can affect component performance and, consequently, normal production. Today, we will discuss the function of accumulated material inside the rotor of a vertical impact crusher.

The accumulated material in the rotor protects the inner wall of the rotor, but more importantly, it protects the rotor's discharge head from direct wear and impact.

Insufficient accumulated material exposes the discharge head, allowing large stones in the material to directly cut into the discharge head, causing premature wear and leading to the discharge head detaching from the clamping plate. Excessive accumulated material can also cause friction with the rotor, affecting its service life.  

1. Adjusting the rotor A newly manufactured rotor typically cannot achieve optimal operating conditions without proper adjustment. Under normal circumstances, each rotor must undergo adjustment before being put into use. Rotor adjustment refers to controlling material accumulation inside the rotor, which can be achieved by altering the dimensions, position, and shape of the feed guide plates. The primary purpose of rotor adjustment is to ensure that accumulated material spreads from the feed guide plates to the discharge head insert and keeps the wear area centred on the discharge head.

2. Adjustment method for insufficient material buildup   If the material buildup is below the height of the discharge head, increase the width of the feed plate until the material buildup approaches the height of the discharge head. If the material buildup begins to erode the feed cylinder, the solution is to move the feed plate toward the discharge head, which will shift the peak of the material buildup away from the feed cylinder without reducing the material buildup at the discharge head.   

3. Adjustment method for excessive material accumulation   If the material accumulates and comes into contact with the feed cylinder, narrow the guide plate until the material begins to retreat from the discharge head. If the material continues to erode the feed cylinder, move the guide plate forward to move the material peak away from the feed cylinder again without reducing the material accumulation at the discharge head.

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