Optimization Design and Maintenance Key Points for Wear Parts of Jaw Crushers
2025-05-02
The core working components of the jaw crusher consist of a moving jaw plate and a fixed jaw plate, which endure tremendous impact forces and material friction during the crushing process, making them highly susceptible to wear. To enhance the equipment's durability, Duma Machinery installs wear-resistant liners—also known as crushing plates—on the surfaces of both the moving and fixed jaw plates, effectively extending the machine's service life.
1. Structural Optimization of the Breaker Plate
Manganese Airboard (Mn13 material) is typically designed with a toothed structure, where the tooth peak angle ranges from 90° to 120°. The specific value should be adjusted according to the material's hardness and desired crushing particle size.
● Large-material crushing: Employs larger tooth-peak angles to enhance impact resistance.
● Fine material crushing: Utilizing a smaller tooth tip angle to enhance crushing efficiency
● Pitch design: Typically 1/2 to 1/3 of the discharge opening width, directly affecting the particle size of the output material.
Due to Eccentric Crusher Wear Parts Due to uneven stress during operation, the lower part wears out much faster than the upper section; therefore, optimizing the liner structure is crucial for extending its service life.
2. Material Selection and Heat Treatment Process
Currently, manganese steel plate (Mn13) is an excellent choice for wear parts in jaw crushers, with advantages including:
✔ High Toughness: With a hardness of approximately 210 HB, it also exhibits work-hardening properties, continuously strengthening under sustained pressure.
✔ Wear Resistance: Surface hardness increases during wear, significantly extending service life.
✔ Aqueous Tempering: Heat to 1000–1100°C, then rapidly cool to stabilize the microstructure and prevent performance degradation.
Although Manganese Airboard Although the cost is higher, when considering both its overall lifespan and maintenance expenses, its cost-effectiveness far surpasses that of ordinary materials.
3. Design Improvement and Maintenance Strategies
● Optimized moving and fixed jaw plates: Adopting a design where tooth peaks shift toward tooth valleys, enabling materials to experience both compression and bending forces simultaneously, thus enhancing crushing efficiency.
● Symmetrical Design: Small crushers feature upper-and-lower symmetrical wear-resistant liners that can be swapped for extended use; larger equipment, however, requires optimized force distribution.
● Regular maintenance: Inspect the wear condition of the crushing plates, and promptly adjust or replace them to prevent excessive wear from affecting production efficiency.
Conclusion
Eccentric Crusher Wear Parts (The manganese jaw plate, moving jaw plate, fixed jaw plate, and wear-resistant liner) — their rational design and material selection directly influence equipment lifespan and operational costs. Duma Machinery, leveraging advanced materials technology and optimized structural solutions, provides customers with high-wear-resistant, long-lasting crushing plate solutions. We welcome inquiries and collaborations!
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Duma Machinery's main products include: mantle and concave liners, crushing walls, and distribution plates for cone crushers; jaw plates, side guards, and pressure bars for jaw crushers; lining plates for ball mills, autogenous mills, and other equipment; impact crusher hammers and impact plates; as well as hammer heads, screen bars, liner blocks, and other wear-resistant alloy steel components for metal shredders.