What Is The Structure Of A Hammer Crusher?

The hammer crusher is a common type of crushing equipment. It is primarily used for crushing medium-hardness and brittle materials. The hammer crusher operates by employing high-speed rotating hammers to impact, crush, and collide with the material. Multiple sets of hammers are fixed to the main shaft rotor. The rotor is driven by an electric motor, causing the hammers to rotate at high speed. Material enters the crushing chamber, where it undergoes impact and collision from the hammers, thereby being reduced to the required granular size. Today we shall provide a detailed introduction to the structure of the hammer crusher.

What Is The Structure Of A Hammer Crusher?

Hammers

These constitute the primary components of the hammer crusher. The quality, shape, and material of the hammers directly influence the equipment’s production capacity and performance. As hammers are wear parts, Regular replacement is required. To facilitate maintenance and reduce hammer replacement time and labour intensity, modular hammer heads are now predominantly used.

Rotor

The rotor comprises the main shaft, hammer discs, pins, and hammer heads. Hammer heads are suspended from the hammer discs via pins. The main shaft is supported on the crusher’s main body by adjustable rolling bearings. Driven by a high-speed motor, the rotor rotates at high velocity, propelling the hammer heads to crush the material.

Impact Liner

During operation, material undergoes rapid impact from the hammer heads. The impact liner absorbs this impact and undergoes secondary crushing. Typically cast from high-manganese steel and subjected to strengthening treatments, the liner ensures superior wear resistance and impact resilience.

Screen Plate

Comprising an arched screen frame and screen plate, it is positioned beneath the rotor. The screen plate primarily discharges material meeting specified particle size through its apertures while controlling output particle dimensions. The screen apertures progressively widen and incline downward to facilitate material discharge.

Drive Assembly

Primarily comprising an electric motor, flexible coupling, and main shaft. The motor directly drives the main shaft via the flexible coupling. The main shaft is mounted within bearing housings on both sides of the frame using spherical self-aligning ball bearings.

Frame

The hammer crusher’s housing and frame. Typically composed of a lower body, rear upper cover, left side wall, and right side wall. These components are connected by bolts. The frame interior is lined with high-manganese steel liners for housing protection and ease of replacement. The lower body is fabricated from welded carbon steel, incorporating bearing supports and the rotor assembly.

Hammer crushers impose specific requirements on raw material moisture content and viscosity. Excessive dampness or water content adversely affects crushing efficiency. Consequently, comprehensive factors must be considered when selecting hammer crushers to ensure production requirements are met.