Hammer crusher is a one-stage crusher that directly crushes materials with a maximum particle size of 600-1800 mm to below 25 or 25 mm. The equipment is mainly composed of box body, rotor, hammer head, counterattack lining plate, sieve plate and other parts. This article will introduce the main structural parts of the hammer crusher in detail.
1. Rack
The frame casing of the hammer crusher is composed of a lower body, a rear upper cover, a left side wall and a right side wall. The parts are connected together by bolts, welded with steel plates, and can also be made into a box-shaped structure. The frame can be divided into two parts, the upper frame and the lower frame, along the center line of the rotor, which are connected with each other by bolts. The upper part of the upper frame is the feeding port, and the manganese steel lining plate is installed inside the frame and the ore contact part, which is convenient for replacement after wear. The lower part of the frame is directly fixed on the concrete with anchor bolts. In order to prevent ash leakage, all parts of the casing in contact with the shaft are provided with shaft seals. In addition, small doors are set on the side walls and the lower body for installation and maintenance.
2. Transmission
The working principle of the hammer crusher is to use the high-speed rotating hammer to impact the material to break it, so the transmission device is directly driven by the motor to rotate the main shaft through the elastic coupling, and the main shaft is installed on both sides of the frame through spherical spherical ball bearings. in the bearing housing. The bearings are regularly lubricated with dry oil to ensure the normal operation of the equipment during use.
3. Hammer
The hammer head of the hammer crusher is the main working part like the plate hammer of the impact crusher, and it is easy to wear during use, so the hammer head is made of high-strength wear-resistant materials, generally high-manganese steel. The shape of the hammer head is mainly plate and block. The block hammer is heavier than the plate hammer, and is mainly used for crushing materials with large block, hardness and long length. In recent years, a new circular hammer has been developed, referred to as the ring hammer. The ring hammer is suspended on the cross-shaped turntable, which can not only impact and crush the material with the revolution of the rotor, but also rotate around the axis to crush and crush the material, so the power consumption is low. The crusher equipped with ring hammer is mainly used for crushing coal and other materials.
4. Rotor
The rotor of the hammer crusher is composed of a main shaft, a hammer disc, a pin shaft, and a hammer head. The main shaft is the most important part of the hammer crusher to support the rotor. The weight and impact force of the rotor and the hammer head are all borne by it. Therefore, the material of the main shaft needs to have high toughness and strength, and the material of the main shaft is made of high-quality alloy steel. The hammer head is suspended in the pin hole on the hammer disc, and is fixed at both ends of the pin shaft with locking nuts to prevent the hammer disc and the hammer head from moving in the axial direction. Wear, hammer is the main wear parts, so both need to be made of high-strength and wear-resistant materials.
5. Counterattack lining
The impact lining plate will be impacted and ground by the materials when the hammer crusher is running. It is made of high manganese steel for casting and quenching after strengthening treatment, which ensures the superior wear resistance and impact resistance of the impact lining plate. Like the hammer, the impact liner is a component that is prone to wear, so pay attention to good daily maintenance and maintenance.
6. Sieve plate
The sieve plate of the hammer crusher is composed of an arc-shaped sieve frame and a sieve plate, which are arranged below the rotor. The sieve plate is made up of many pieces, which are fixed on the sieve frame by self-weight and mutual extrusion. The sieve plate has small inner and outer large conical sieve holes. When the hammer head is worn, the gap between the end of the hammer head and the surface of the sieve plate can be changed by adjusting the upper and lower positions of the bolt to ensure that the gap is within a certain range, thereby ensuring a certain product size range.
