VSI Crusher Parts

VSI Crusher Parts | Vertical Shaft Impactor

VSI crusher is an advanced and high efficient crusher used for the shaping of metallic, non-metallic ores and building materials. Further, it is very helpful for making all kinds of metallurgical slag. This crushing machine is applicable to the material with hardness less than level 9. Further, it is not appropriate for viscous materials such as stone with too much soil.

This article gives you a complete overview of the VSI crusher. Further, you will learn the complete working of VSI crusher and VSI crusher parts in-details. Let’s get started…

What is VSI Crusher?

The vertical shaft impactor is a type of impact crushers that offers higher reduction ratios at lower energy consumption. You can consider them as a stone pump that operates like a centrifugal pump.

There are plenty of VSIs are available in the market such as Sandvik’s CV series and Barmac B Series. These crushing machines use the rock on the rock crushing principle for size reduction. The size reduction results in cost reduction.

The main objective of this machine is to provide high-quality sand aggregate for high-speed railways, municipal buildings, high-rise buildings, and hydropower dam construction. VSI crushers are designed for tertiary crushing.

Different VSI Crusher Parts and Working

Here are some important VSI crusher parts with the functionality:

  1. Feed Hopper:It is a part where the feed materials fall in the vertical crusher impactor crusher. Plus, it is basically a rock-lined hexagonal feed hopper.
  2. Rotor Throttle Gate:It is a hydraulically operated gate that controls the feed rate of rotor material.
  • Hurricane Rotor:The feed material falls into the feed tube by gravity that subsequently feeds the hurricane rotor.
  1. Rock-lined Hurricane rotor:The VSI crusher uses this rotor to accelerate the feed material. Basically, the centrifugal force plays a key role to accelerate the material at the speed of 45 to 62 m/s.
  2. Crushing Chamber:This chamber is lined with a solid layer of material that energized rotor material impacts. It is considered high-velocity autogenous impaction that causes cleavage and attrition of the feed material.
  3. Enclosed Metal Rotor Shoe:It is a top plate that enclosed the top of the rotor and prevents material from escaping from the rotor’s top. It is very helpful in the case of an overfed open-top rotor.
  • Tubular Metal Rotor Shoe:The tubular rotor increases the tip-speed that increases the first feed particle with tighter particle size distribution. In addition to this, it reduces recirculation loads.
  • Open Top metal Rotor Shoe:It is very good for a large feed. Plus, it is an incredible rotor for medium to very hard material. However, the open-top metal rotor works best for softer materials. This rotor can deal with abrasive, dry, or wet materials but it doesn’t work well with the sticky materials. In this rotor, high reduction ratios are common that are very helpful for gravel and sand production in the closed system.
  1. Crushing Chamber:As the name suggests, this is a crushing chamber that crushes everything it receives. Then, this crushing action conveys extremely high energy to the material for crushing purposes. And, this energy is very effective for the majority of the objects. As a result, you will receive a very consistent and uniform grade of material.
  2. Discharge Chute:After producing the high-quality sand aggregate, discharge chute receives it.

VSI crushers have the ability to handle hard, fine, sticky, abrasive, and moist feed materials. These characteristics make it one of the suitable crushers for different applications like quarries and gravel plants. Many firms use it for recycling such as processing glass bottles and cement works.

Feeding Methods of VSI Crushers

Below are the two most popular feeding methods for VSI crushing machines:

  1. Center Feed

The majority of the VSIs receive the feeding material from above into the center of the rotor. After feeding it through the center of the rotor, the material is reached to the crushing chamber. Then, the crushing chamber impacts the outer anvil ring. This crushing action generates extremely high energy to break the material for crushing purposes. And, this energy is very effective for breaking the majority of the objects. As a result, you will receive a very consistent and uniform grade of material.

  1. Cascade Feeding

In this method, feeding material enters the crushing chamber from above directly by bypassing the rotor. This method is called cascade feeding because the material fills up a large feed bowl. Then, it spills over the side and falls into the crushing chamber from above without involving the rotor. The effect of increasing feed through cascade has a striking resemblance to slowing the rotor. Furthermore, cascade feeding might not affect the particle size distribution of quality if its amount is up to 10%.

Main Applications of VSI

Its major limestone applications include gravel, sand, road base, and cement. Besides, its industrial uses include Ferrosilicon, glass, cordite, corundum, silicon carbide, zeolite, and tungsten. The mining applications for VSI crushers are burnt magnesite, non-ferrous metal ore, trona sulfate, perlite, bauxite, iron ore. These crushing machines are very helpful for everything range from waste to abrasive materials and recycling applications.

VSI Crushing Method

VSI crushers are famous for making coarse, sand, and medium aggregates for asphalt/ concrete production. The feed size varies depends on the machines that range from 5 to 12 inches. Therefore, the suitable sized material is provided into the center of an open or closed rotor. It can be either center or cascade feeding.

Then, the rotor starts rotating at very high rpm and throw the feed with high energy into the crushing chamber. When the thrown material hits the anvil ring assembly, it shatters. After this, the cubical shaped products fall through the opening between the anvil, rotor, and to the conveyor below.

The speed of the rotor decides the size of the final particle. If you speed up the rotor, it will produce more fines. Similarly, if you slow down the rotor, it will produce fewer fines. You can adjust the speed of the rotor based on the feeding material.

jaw crusher parts

What Is A Jaw Crusher | Jaw Crusher Parts

Jaw Crusher is a machine that is mostly used in the primary and secondary process of crushing. The main objective of this machine is to crush the large blocks of hard and abrasive materials.

This article explains the complete working principle of jaw crushers. Besides, we will also explain the complete main components of the jaw crusher. What are the main parts and parameters of the jaw crusher? So let’s get started…

How Does Jaw Crusher Work?

The working mechanism of the jaw crusher is very simple and straightforward. A jaw crusher comes with two powerful jaws in which one is fixed and the other one can move. Its working principle is based on the reciprocating movement of the movable jaw. The moveable jaw compresses and crushes everything including ore or rock between itself and the fixed jaw.

The movement of the movable jaw is back and forward against the fixed jaw and break the material between the two jaws into smaller pieces. The crushed material is released from the crusher at the bottom when the moving jaw moves back from the fixed jaw.

What Are The Main Parts of Jaw Crushers?

Jaws play a key role in a jaw crusher. However, the real heart of the jaw crusher and its components are the pitman, the toggle plates, and flywheel. These are the main parts that provide a sufficient amount of energy to break the rocks. Let’s take a brief overview that how these parts work together and make a crushing cycle:

Top 10 Jaw Crusher Parts

Below are the 10 most incredible parts of jaw crushers:

  1. Drive Flywheel

The flywheel is the heart of the jaw crusher. The main objective of the flywheel is to generate a sufficient amount of energy in the form of motion. An electric motor provides enough momentum to the flywheel. Then, it initiates the crushing cycle. One the process is started, the motor will have to provide the energy only necessary to propel the flywheel.

  1. Cheek Plate

These plates are made of high manganese steel casting. In addition to this, some other materials are also used in its construction such as advanced composite material. And, super high and ultra-strong manganese. You can easily replace these places if necessary. There are two types of cheek plates: upper cheek plate and lower cheek plate.

  1. V-belts

These are one of the most common types of drive belts used for power transmission. The primary function of V-belts is to transmit power from the primary unit such as a motor to the shaft.

  1. Drive Motor

It is another most important part of a jaw crusher. This electric motor drives a reducer sheave. The one side of the reducer sheave is an eccentric shaft and the other end of the shaft is a flywheel.

  1. Motor Stand

As the name suggests, the motor stand gives support to the drive motor. So it is a stand where an electric motor sits for proper functioning.

  1. Eccentric Shaft

The eccentric shaft which is commonly known as pitman generates the crushing action. It is a shaft with a portion of its length offset from the rest of the shaft. The portion travels in a greater arc when the shaft revolves. The manufacturers generate motion by attaching a bearing system i.e. pitman bearing and cup. So the generating motion direction is usually up and down.

  1. Toggle Plate

Depending on the type of jaw crusher, the toggle plates play an important role in the crushing process. The toggle plates are comprised of two steel plates and the manufacturers combine these plates with the help of bolts. These bolts are commonly known as Shear Bolts because these bolts are famous for shear strength. If crusher can’t crush something accidentally gets into the crushing chamber. Then, these bolts shear off when the jaw hits the unbreakable material. Therefore, it will prevent damaging the crusher.

  1. Swing Jaw

All jaw crusher comes with two jaws. One of them is moving or swing jaw. This jaw moves back and forward against the fixed jaw to break everything between them into smaller pieces. You can consider it as a lower jaw in humans.

  1. Fixed Jaw

As the name suggests, the fixed jaw can’t move. The moving jaw only moves back and forth to crush different things. You can consider it a supporting jaw that has a striking resemblance to the upper jaw in humans.

  1. Discharge

This is a part that collects the crushing piece of an object. When the swing jaw moves back, the crushed objects are dropped in this part.

Different Jaw Crusher Parameters

Here are some important parameters of jaw crusher given below:

  • Gap Width
  • The maximum feed size is between 80% and 90% of the inlet width.
  • Crushing area length is almost double from the gap width.
  • Crushing area width varies from 1.3 to 3 times based on the gap width.
  • L-Max is a far side jaw opening.
  • L-Min is near side jaw opening.
  • Stroke is the minimum and maximum movability of the lower end of the jaw.
  • The size Reduction ratio is a gap width to the near side jaw opening. It can vary between 1/3 and 1/9. However, primary crushers have a 1/3 size reduction ratio and the size reduction ratio in secondary crushers is ¼ usually.

Nip Angle

The angle between the two jaws is one of the most incredible parameters. This parameter is most commonly known as the nip angle. This is the angle that decides the size of the material passes through the crusher inlet to be crushed. Therefore, this angle is very important that helps the crusher to grip the object without slipping. So this angle depends on the size, frangibility, and the hardness of the material. You can’t select the object that is too small or too large. The nip angle in secondary crushers is greater than the angel in primary crushers. Generally, the value of the angle range from 18 to 24 degrees in primary and 22 to 28 degrees in secondary crushers. The maximum value of nip can be 33 degrees.