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Impact crushers and hammer crushers are both used in the intermediate crushing stage of the crushing production line. They have similar appearances and structures. Both can be used in the mining industry, but there is a significant difference between the two in terms of structure and working principle. What are the specific differences?

The working principle is different.
Impact crushers are a type of crushing machinery that use impact energy to crush materials. The machine’s motor drives the rotor at high speed, crushing the material with impact. This process is repeated, gradually reducing the material from large to small pieces, until the desired size is achieved and the material is discharged through the discharge port.

The hammer crusher relies on impact energy to crush materials. The motor drives the rotor at high speed, uniformly feeding material into the crushing zone. The material, larger than the screen holes, blocks the screen plate and continues to be hammer-blown and ground until it is the required size. Finally, it is discharged from the machine through the sieve plate.

Second, the structure is different
The main structure of the impact crusher:
1.compression block

This part is widely used in all kinds of mining machinery, the material is excellent, stable performance, can be made according to different requirements. After the load test run is completed, the pressure block should be adjusted as necessary. Pressing block has stable chemical composition, reasonable heat treatment process, good abrasion resistance, high strength and other excellent features. The automatic clamping mechanism of compression block adopts cylinder drive, connecting rod mechanism and linear guide way, which realizes the sequential actions of clamping block, feeding, clamping at the other end, loosening and returning at the same time.

2. Impact rods
Impact rods withstand the impact of the material struck by them. This makes the material crushed by the impact. The impact-crushed material rebounds back to the impact area. This allows the impact crushing to continue. This process is repeated until the required product size is obtained.

The impact crusher’s rotor is made of integral cast steel. This makes it sturdy and durable. It is also easy to install. Impact rods are large and heavy. This makes them suitable for meeting crushing requirements. The small and light impact crusher rotor can also be welded steel plate.

3. Square Steel
Square steel is square in shape and can be divided into two categories: seamless and seamless. Seamless square steel is made of steel plates welded together to make a square steel pipe. Seamless square steel is made by re-drawing seamless steel pipe. Its compressive capacity is far superior to that of seamless square steel pipe.

The hammer crusher is built like this:
1. Housing
The housing of the hammer crusher consists of the lower body, the rear upper cover, the left side wall, and the right side wall. These parts are connected by bolts. The upper part is equipped with a feeding port, and the inner wall of the housing is inlaid with high manganese steel Cheek plate, which makes it easy to replace Cheek plate after wear and tear. The lower body is made of welded carbon steel plate, and high manganese steel is used to weld the bearing support on both sides to support the rotor. There is no protective measure between the casing and the shaft, and the ash leakage is very serious. The casing is equipped with shaft seals in all the places in contact with the shaft to prevent ash leakage. The grate and hammer’s lower body has open access holes on both sides of the wall. This allows for easy maintenance, adjustment, and replacement.

2. Rotor
The rotor is supported on two rolling bearings. These bearings are bolted to the lower machine body. Two locating pins are fixed at the center distance of the bearings. The rotor is designed to store a specific amount of kinetic energy. This energy is then used to reduce the motor’s peak load and minimize wear and tear on the hammer. The rotor is equipped with a flywheel at one end of the main shaft for this purpose.

3. spindle
spindle is the Hammer crusher to support the rotor of the most important components, rotor, Hammer weight, impact are borne by its, so the spindle material needs to have high toughness and strength, the spindle material using alloy steel, through the ultrasonic flaw to process the tempering treatment, Hammer crusher hammer plate is used to hang the Hammer.

4. Hammer
The hammer is the most important working part of the hammer crusher. The quality, shape, and material of the hammer directly determine its production capacity. The size of the kinetic energy of the hammer is directly proportional to its weight. The heavier the hammer, the greater its kinetic energy and the higher its crushing efficiency. The Weight of the Hammer has a complete range of hammer weights, all of which can be customized according to the customer’s needs. SHANVIM’s hammer adopts a new type of multi-element high chromium-manganese steel composite casting, and its service life is several times longer than that of a standard hammer.

5. The lining plate and striking plate of the hammer crusher are designed to withstand the high-speed pounding of ore by the hammer. The use of manganese steel in the inner wall of the frame and the cheek plate ensures durability. The cheek plate is made of high-quality steel, undergoes a rigorous quenching and strengthening process, and offers superior abrasion and impact resistance. The Cheek plate and strike plate have superior abrasion and impact resistance. The quality of a hammer crusher directly impacts its service life, and the quality of its constituent parts is paramount.

The third point is clear: the crushing materials are different. There is a distinction in material handling because of the structure and working principle between the two reasons.
Hammer Crusher Material Selection
The hammer crusher is exclusively used for materials with lower hardness, such as coal, gypsum, masonry, and limestone.

The Impact Crusher is the perfect solution for processing soft and medium-hard materials.
Impact breaker has no grate bar, so it can avoid clogging when processing materials with large water content. The Hammer Crusher is prone to clogging when processing materials with high moisture content. This is due to its grate bar construction.

SHANVIM as a global supplier of crusher wearing parts, we manufacture cone crusher wearing parts for different brands of crushers. We have more than 20 years of history in the field of CRUSHER WEAR PARTS. Since 2010, we have exported to America, Europe, Africa and other countries in the world.