Contents:

1. What is a VSI crusher?

• Application area
• Working principle
• Characteristic

2.What are VSI crusher parts and their functions

• Rotor tips
• Feed tube
• Upper and lower wear plates
• Distributor plates
• Back-up tips
• Tip & Cavity wear plates

What is a VSI crusher?

VSI sand making machine is the latest sand making machine, which can save 50% more energy than traditional sand making machine. It can make all kinds of rocks, sand, and pebbles into construction sand with various grain sizes. The sand has uniform grain size and high compressive strength, which is far more in line with the construction requirements than natural sand and sand produced by ordinary hammer-type sand beater and can improve the construction quality. The equipment has the characteristics of reliable performance, reasonable design, convenient operation, and high efficiency.

 

Application Area

1. Artificial sand making of river pebble, mountain stone (limestone, granite, basalt, diabase, andesite, etc.), ore tailings, and stone chips.

2. Construction aggregate, road fabric, cushion material, asphalt concrete, and cement concrete aggregate production.

3. In the field of water conservancy and hydropower, high-grade highway, expressway, high-speed railway, passenger dedicated line, bridge, airport runway, municipal engineering, machine-made sand production, and stone shaping of high-rise buildings.

4. Fine crushing process before grinding in the mining field, material crushing in building materials, metallurgy, chemical industry, mining, refractory, cement, abrasive and other industries.

5. High abrasiveness and secondary disintegration crushing, desulfurization in thermal power and metallurgical industry, steel slag, construction waste crushing, and other environmental protection projects.

6. Production of glass, quartz sand, and other high purity materials.

 

Working Principle

VSI sand making machine uses high-speed rotating materials to break each other and friction between materials to break. The maximum particle size of its feeding material must be in accordance with the particle size specified in the technical performance parameter table of the machine. It is strictly forbidden for materials larger than the specified particle size to enter the crusher. The maximum water content of the crusher is less than 20%. Generally, the ore from the sand washer can be directly crushed by the crusher.

The discharge particle size of the VSI sand making machine is related to ore physical properties and feed particle size. The ore is fragile. The smaller the feed particle size is, the higher the qualified rate of product particle size is. On the contrary, the lower the impeller speed, the product size can also be adjusted. When the particle size of the discharged product of the sand-making machine is not more than 10 mm, the qualified rate is 60-90%. In order to ensure that the qualified rate of the particle size of the product reaches 100%, it is necessary to use classification equipment for closed-circuit crushing.

 

Characteristic

1. Compared with the traditional equipment under the same power, the output is increased by 30% and stable.

2. Low consumption of wearing parts – the best impact angle design of crushing chamber material, less friction with wear-resistant parts, 30% lower than the traditional equipment operation cost, directly reducing the use cost of the equipment.

3. Excellent grain shape – the product is cubic, with good grain shape, reasonable gradation, and adjustable fineness modulus. It is especially suitable for artificial sand making and stone shaping. The practice has proved that the effect of sand making and stone shaping is 30% higher than that of other traditional equipment.

4. Hydraulic device, easy to maintain – hydraulic cover opening device, makes the maintenance and replacement of parts in the crushing chamber convenient and fast, shortens the downtime, saves time and labor.

5. Automatic detection, safe and reliable – set up the vibration display and alarm device, if the equipment has a bad operation, it can send out a warning, so that the equipment stops working, to achieve the purpose of protecting the machine.

6. Thin oil lubrication, automatic maintenance – Germany original thin oil lubrication station, double oil pump complementary guarantee oil supply, no oil flow, no oil pressure automatic shutdown; oil cooling and heating device to ensure that the bearing lubrication is always in the best state. So as to completely solve the problem of bearing heating, make the spindle bearing keep a constant temperature, prolong the maintenance cycle, and service life.

7. Simple installation and easy operation – the equipment is light in weight, various in installation methods, and can be installed in a movable way; the installation, repair, and maintenance are simple, and the operation and use are convenient; once the specific purpose is clear, the VSI crusher can give full play to its excellent performance with only minor adjustment.

What are VSI crusher parts and their functions?

There are some VSI crusher parts that need to exchange regularly. The common VSI wear parts include:

• Rotor tips
• Feed tube
• Upper and lower wear plates
• Distributor plates
• Back-up tips
• Tip & Cavity wear plates

 

Rotor Tips

Rotor tips are the main replacement wear parts in the VSI crusher. Rotor tips are manufactured by cemented carbide inlays. Its function that directly to crush raw material.

Feed Tube

Feed tube and Feed eye ring are designed to guide the feed material into the rotor after it has been through the hopper. 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. This does not spin. In some rotors there are different feed tubes for high and low throughputs, the low throughput option has a smaller opening into the rotor.

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).

Wear plates are kept in place using the centrifugal force of the rotor as it is spinning, there are no nuts and bolts, only some clips for the plates to slide under. This makes it easy to change and remove it.

The lower wear plates generally wear more than the upper wear plates due to underutilization of the rotor’s maximum throughput and the use of an incorrectly shaped trail plate.

Distributor Plates

The Distributor plate is designed to protect the plate that joins the Rotor, Rotor Boss, and Shaft together from feed material falling into the rotor from the hopper.
This part is subject to wear from both the feed material falling onto it (impact) and is also being“distributed” to the three ports in the rotor (abrasive). It is attached to the rotor using one bolt that screws into the top of the shaft.
(HELPFUL TIP) – This bolthole must be protected by stuffing cloth in the hole and either letting stone build up on top of the cloth to protect it, or filling the gap with silicone. This must be done, or it can be very difficult to remove the bolt when needed. The distributor is the wear part that receives the most impact wear, and will normally wear out the fastest in standard applications. There is only 1 distributor plate in each dressed rotor.

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. The back-up tip has a small Tungsten insert in it that will last for about 8 -10 hours of wear in normal operation. If this backup is broken again, or it wears out then the feed material can seriously damage the rotor due to abrasion. The back-up tip is positioned behind the Rotor Tip and the Tip Cavity Wear plate on the outside edge of the rotor.

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 against particles that have rebounded from the chamber build-up after their initial exit from the rotor. As the TCWP is the furthest wear part from the center, and on the leading faces of the rotor, then they are most susceptible to this type of wear.
These parts are positioned in two places on the rotor, firstly they are put on top of the Rotor tips to protect the vulnerable areas of the parts, and secondly on the other side of the rotor port to protect this leading-edge from wearing away and compromising the efficiency of the rotor.