Product Introduction: The vertical shaft impact crusher is developed by our company through absorbing and introducing German technology and years of practical experience. It is a crusher that can freely select the principle of material-to-material and material-to-metal impact for sand making. It features a unique rotor structure design, wear-resistant material technology, and an optimized crushing speed, perfectly combining professional fine crushing technology with machinery. It is a model of the perfect integration of new technology and new processes. It is the core equipment in the manufactured sand industry. The manufactured sand has a smooth particle shape, uniform particle size, low powder content, and high quality. This new generation crusher aims to improve energy utilization, reduce wear rate, extend maintenance cycles, reduce maintenance time, and increase crushing efficiency. It is energy-saving, has high output, long service life, high energy utilization, excellent product particle shape, easy maintenance, and wide application, meeting the needs of modern sand and gravel production. It can provide high-quality sand and gravel aggregates for highways, high-speed railways, high-rise buildings, municipal construction, hydropower dam construction, and concrete mixing plants. It is an ideal device for artificial sand making and stone shaping. It supports the gradual transition of large sand yards towards large-scale and centralized production. Application Range: Widely used in artificial sand making operations for metal and non-metal ores, metallurgical slag, water conservancy and hydropower, refractory materials, building materials, high-grade highways, railways, sand and gravel yards, concrete sand making, dry powder mortar, manufactured sand, power plant desulfurization, quartz sand, and other industries. Applicable Materials: Suitable for sand making and recycling of various hard and brittle materials such as slag tailings, river pebbles, granite, basalt, iron ore, cobblestones, shale, limestone, dolomite, calcite, quartz, diabase, greenschist, coal, calcium carbide, quartz sand, coal gangue, feldspar, construction waste, concrete aggregates, aluminum vanadium clinker, corundum, and other materials.

Working Principle

The vertical impact crusher, depending on working conditions or the type of material to be crushed, controls the feeding method to utilize mutual impact for self-crushing or impact between the material and the metal impact plate. The vertical impact crusher is equipped with two types of crushing chambers: "stone-on-stone" and "stone-on-iron," ensuring a more comprehensive crushing function for impact sand making and shaping machines. The former is more conducive to shaping stones, while the latter is more suitable for crushing processing. Using advanced selective crushing and cleavage crushing principles, sufficient kinetic energy is directly applied to the material, and through impact, this kinetic energy is converted into the energy required to overcome the material's resistance to crushing. The material mainly fractures along its natural texture and cleavage planes, resulting in good particle shape and low self-consumption.

"Stone-on-stone" means the motor drives the bearing sleeve transmission part of the main shaft to rotate at high speed, while the rotor rotates rapidly with the main shaft. The material entering the impeller is accelerated and sprayed into the crushing chamber, where it collides and grinds against the material lining inside the chamber. The accelerated material gains kinetic energy, which is converted into the energy needed for crushing or shaping the material. The material circulates multiple times within the crushing chamber, undergoing multiple crushing and shaping actions under the influence of surrounding gas vortices, achieving continuous crushing and shaping. The finished product is discharged from the lower part of the machine body. This crushing method is called "stone-on-stone" and is mainly used for shaping and crushing stones.

"Stone-on-iron" means that after the material is ejected from the rotor, it collides with the impact blocks installed inside the crushing chamber. The material is accelerated to gain energy, which is converted into the energy required to break upon collision with the impact blocks. After impact, the material is discharged directly from the lower part of the machine body, without multiple cycles of crushing inside the chamber. This crushing method is mainly suitable for work scenarios focused on crushing (aiming for a large crushing ratio). The feed is introduced entirely through the central feed pipe into the high-speed rotating impeller chamber, then accelerated by the impeller and thrown out from three or more discharge ports, violently impacting the metal impact plates installed on the crushing chamber walls, forming the stone-on-iron crushing.

Full central feeding with annular waterfall feeding: Material falls into the sand making machine's feed hopper, then drops through an annular hole and is divided by a distributor plate into two streams. One stream enters the high-speed rotating impeller through the distributor plate, while the other falls around the distributor plate. The material entering the impeller is rapidly accelerated inside, reaching accelerations of several tens of times gravity, then is thrown out at high speed. It first impacts and crushes the other part of the material freely falling around the distributor, then together they impact the vortex chamber's lining layer. The material rebounds off the lining, impacts obliquely upward to the top of the vortex chamber, changes direction, moves downward, and collides with material emitted from the impeller flow channel, forming a continuous material curtain. Thus, a piece of material undergoes two or more chances of impact, friction, and grinding inside the vortex crushing chamber. As crushing proceeds, small particles gradually form a material layer curtain near the surrounding guard plate, enhancing crushing effect and protecting the equipment. Qualified finished products are discharged from the lower outlet.

Advantages and Features

Increased chamber volume significantly improves throughput, reduces operating resistance, and decreases motor idle power consumption. Reasonable size and angle reduce wear on vulnerable parts. The automatic operation control system can monitor the crusher's bearing temperature and vibration, enabling fault alarms or automatic shutdown to protect the crusher.

High production efficiency improves output and product particle shape, which is more cubic with fewer needle-like particles. The bulk density is high, grading is uniform, iron contamination is low, making it suitable for aggregate shaping, artificial sand making, and high-grade highway aggregate production.

Product particle size can be controlled by adjusting the crushing chamber mode or waterfall flow size.

The combined guard plate design allows worn parts to be reversed and reused, extending the replacement cycle of spare parts.

The impact crusher's hydraulic tensioning device for the V-belt effectively tightens the belt, increases friction, suppresses belt vibration, and extends the belt's service life.

The sand making machine can also be optionally equipped with a thin oil lubrication system and PLC automatic control and monitoring system, which can timely monitor feed volume, current, oil temperature, main shaft temperature, vibration protection, and other functions.

The deep-chamber four-port impeller design improves crushing efficiency, increases material throughput, and yields a high finished product rate. The crushing principle is optimized for impact crushing, producing excellent particle shape. The machine body is divided for large throughput, with a large discharge port design ensuring smooth material discharge, effectively preventing material blockage and abnormal equipment damage, thereby improving crushing efficiency. Core wear-resistant parts use new processes and materials with highly wear-resistant and impact-resistant materials, greatly extending the service life of wear parts and effectively reducing downtime and wear.

The impeller adopts a four-port design to increase material throughput and collision probability between materials; the bearing sleeve features a unique exhaust dust-proof device and sealing structure to prevent dust ingress causing oil leakage from the lower bearing cover; the lower part of the machine body is changed from a "井" (well) structure to a "十" (cross) structure to prevent material blockage in the discharge channel.

Optimized discharge port structure and smooth internal impeller material flow curve design reduce material flow resistance, increase material throughput and crushing ratio, resulting in higher efficiency, better particle shape, greater output, and lower maintenance costs.

The use of a thin oil lubrication system reduces bearing friction and increases bearing speed, greatly improving work efficiency.

Automatic detection is safe and reliable, equipped with over-vibration display and alarm devices. If the equipment operates abnormally, it can issue warnings and stop operation to protect the equipment.

Technical Parameters

Specifications and Models	Maximum Feed Size (mm)	Impeller Diameter (mm)	Impeller Speed (r/min)	Processing Capacity (t/h)	Motor Power (kW)
DH1150	<45	1100	1300	350	250kW*2
DH1263	<50	1200	1200	460	315kW*2
DH1380	<50	1300	1100	800	400kW*2