Here are the key parts of a VSI crusher and their functions:
- Distributor Plate
- Rotor Tips
- Upper and Lower Wear Plates
- Back-up Tips
- Tip / Cavity Wear Plates
- Trail Plates
- Feed Tube
- Feed Eye Ring
- Top and Bottom Wear Plates
VSI Crusher Parts
VSI (Vertical Shaft Impactor) crushers are machines used in the quarrying, mining, and construction industries to crush rock, gravel, and other materials. The main components of a VSI crusher include a rotor with a series of wear-resistant teeth or blades, a crushing chamber, and an adjustable discharge port.
Distributor Plate
This is located above the rotor and helps to distribute the material evenly across the crushing chamber. The distributor plate is the wear part that receives the most impact wear(material feeding), and will normally wear out the fastest in standard applications. There is only 1 distributor plate in each dressed rotor.
Feed Tube
The Feed tube is subject to high abrasive wear as all of the feed material going through the rotor will pass through it. The Feed tube is secured into the Spider assembly of the crusher using a clamp plate and spring handle.
Rotor Tip
The Rotor tips are the last thing to touch the feed material as it exits the rotor. They can have a Tungsten insert that improves wear life. We often use the life of the tips as a reference point for the other rotor wear parts.
Back-up Tips
The back-up tip is designed to protect the rotor if and when a rotor tip gets broken or worn out. When this happens the Tungsten insert in the rotor tip has split and is now letting feed material run against the Tungsten insert of the back-up tip.
Tip Cavity Wear Plates
Tip / Cavity Wear plates are designed to protect the outside edges of the rotor against excited particles in the crushing chamber. As the rotor spins, it impacts particles that have rebounded from the chamber build-up after their initial exit from the rotor.
Feed Eye Ring
The Feed eye ring is subject to minimal wear in normal operating conditions, and in some rotors can be turned 3 times to maximise wear life. The Feed eye ring is secured to the feed opening of the rotor either with bolts or by dropping into slots and rotating to lock.
Top and Bottom Wear Plates
The Top and Bottom wear plate is designed to protect the top and bottom outside surfaces of the rotor. The top surface can get worn when the feed tube and feed eye ring are worn letting material though the gap created in the rotor feed opening. The bottom surface can get worn when material build-up in the crusher base becomes excessive and starts pushing upwards against the rotor.
Trail Plates
The Trail plates are designed to hold in the material build-up inside the rotor behind the rotor tips. They can be the least expensive wear part in a rotor, but as they are responsible for keeping the build-up in place, they are very important.
Upper and Lower Wear Plates
These wear plates are designed to protect the upper and lower faces of the inside of the rotor from the feed material as it passes through the rotor (the material build-up protects the sides).
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