The quality of roll crusher needs to be considered comprehensively from multiple dimensions such as structural design, material performance, manufacturing process, operation efficiency and after-sales service. The following are the specific evaluation points and technical basis:
Roll Crusher
Quality Evaluation of Double-Roller Crushers
Assessing the quality of double-roller crushers requires a comprehensive analysis of structural design, material performance, manufacturing processes, operational efficiency, and after-sales service. Below are key evaluation points with technical evidence:
1. Core Components & Material Performance
A. Roller Skin Material & Wear Resistance
The roller skin is the core wear part, directly impacting crushing efficiency and lifespan. High-quality crushers should use high manganese steel, alloy steel, or premium alloys, which provide hardness and wear resistance to handle high-hardness materials like steel slag (compressive strength ≤160 MPa). Inferior roller skins cause over-crushing or uneven particle sizes, compromising project quality.
B. Bearings & Transmission System
- Gearboxes require regular gear oil lubrication, with seasonal adjustments (e.g., summer/winter oil changes).
- Rolling bearing temperatures must remain stable (monitored every 20 minutes until stabilized) to prevent overheating failures.
2. Structural Design & Manufacturing Precision
A. Structural Stability
- Base components must be corrosion-free, deformation-free, and securely welded. Support brackets should be crack-free.
- Hydraulic systems must include overload protection to retract rollers when encountering unbreakable objects, preventing damage.
B. Manufacturing Standards
- Welded structures require rust removal quality checks (sample comparison or visual inspection).
- Gearbox assembly must follow strict bolt-tightening sequences (diagonal-to-center), and couplings must have uniform gaps.
3. Performance Metrics & Operational Efficiency
A. Crushing Efficiency & Particle Control
- Capacity is calculated based on cumulative operation time (≥0.5 hours), with output particle size measured via standard sieves.
- Adjustable roller gaps (1–40 mm) control maximum discharge size. High-quality crushers achieve ≥90% particle uniformity and ≤5% over-crushing rates.
B. Energy Efficiency & Environmental Compliance
- Energy consumption should be ≤0.8 kW·h/ton, noise ≤75 dB.
- Sealing tests use red brick crushing to ensure no dust leakage (≤10 mg/m³).
4. Safety & Intelligent Control
A. Safety Mechanisms
- Emergency switches, guards, and covers must be functional.
- Magnetic separators prevent metal debris from damaging rollers.
B. Smart Adjustments
- Hydraulic systems dynamically adjust roller pressure (1.5–4 MPa) to match material hardness.
- Some models support remote APP control for particle size adjustments.
5. After-Sales Service & Certifications
A. Manufacturer Credentials
- Crushers must pass factory tests (e.g., 1S withstand voltage test for electrical cabinets) and type inspections.
- Prioritize manufacturers with ISO certifications and complete qualification documents.
B. Technical Support
- Reputable suppliers provide maintenance manuals, technical assistance, and rapid response services.
- Regular maintenance (e.g., roller surface hardfacing, bearing lubrication) extends lifespan to ≥5,000 hours.
Summary
Key factors for evaluating double-roller crushers:
- Material Quality: High-wear roller skins, premium bearings.
- Manufacturing Precision: Stable structure, precise assembly.
- Performance Validation: Particle uniformity, energy efficiency, environmental compliance.
- Safety & Intelligence: Overload protection, adaptive controls.
- Service Assurance: Manufacturer reputation, certifications, and support.
Recommendations:
- Conduct on-site inspections of operational cases (e.g., ’s judicial appraisal case).
- Verify performance through trial tests (red brick crushing, cast iron safety tests).
- Consider user reviews and industry reputation.
