HPL Series Cone Crushers Eccentric Sleeve Assembly

Core Position of the Assembly

The eccentric sleeve assembly is the core transmission and force transfer component of the HPL Series cone crushers, directly determining the equipment's crushing efficiency, operational stability, and service life. Through eccentric motion, it drives the crushing cone to perform oscillating movement, forming periodic changes in the crushing chamber volume to achieve laminated crushing of materials. As the key hub connecting motor power and crushing operations, it is suitable for medium and fine crushing working conditions of all HPL Series models (including core models such as HPL500).

Structural Composition, Material and Process

Core Components

• Eccentric Sleeve Body: Adopts an integrated cast steel structure with built-in copper sleeve installation grooves and lubricating oil channels, and an externally designed transmission gear meshing surface to ensure precise and efficient power transmission.

• Copper Bushings (Shaft Bearings): Equipped with sliding bearings made of tin bronze/lead bronze, divided into main shaft copper bushings and spherical copper bushings, featuring excellent wear resistance and friction reduction performance, suitable for heavy-load and high-speed operation scenarios.

• Transmission Gear: Forged from high-strength alloy steel and subjected to carburizing and quenching treatment, with high tooth surface precision and strong load-bearing capacity, achieving precise meshing with the motor transmission system.

• Sealing Assembly: Includes dust rings, oil seals, and sealing rings, made of polyurethane/nitrile rubber. Cooperating with the equipment's overall dustproof system, it prevents dust intrusion and lubricating oil leakage.

• Lubricating Oil Circuit: Built-in integrated lubricating oil channels, linked with the overall thin oil lubrication system of the equipment to ensure continuous lubrication of key contact surfaces.

  
  

Material and Process Advantages

• The eccentric sleeve body is made of high-strength alloy cast steel, precision-machined by CNC machining centers with a dimensional accuracy error of ≤0.02mm, ensuring assembly compatibility with other components.

• Copper bushings are manufactured via centrifugal casting process, featuring uniform metallographic structure and polished surfaces, low friction coefficient, and ability to withstand alternating loads and high-temperature working conditions.

• The entire assembly undergoes non-destructive testing (UT/MT), with no defects on key welds and stress-bearing surfaces, meeting the strength requirements of heavy-load crushing scenarios and suitable for crushing various rock materials with hardness ≤320MPa.

  
  

Core Functions and Product Highlights

Core Functions

• Power Transmission: Converts the output torque of the motor into the oscillating movement of the crushing cone. Through the design of eccentricity (adapting to the 20-36mm eccentric stroke range of the HPL Series), it precisely controls the extrusion frequency and stroke of the crushing chamber to ensure crushing efficiency.

• Working Condition Adaptability: The integrated structure design can withstand heavy-load impacts, maintaining stability under continuous operation with high capacity (140-560t/h) and avoiding equipment failures caused by component loosening.

• Protection Coordination: Linked with the overall hydraulic protection system of the equipment. When encountering overload conditions such as iron passing in the crushing chamber, the force on the eccentric sleeve is transmitted to the hydraulic system, triggering the expansion of the discharge port for protection and avoiding component damage.

• Lubrication Guarantee: The built-in oil circuit is synchronized with the thin oil lubrication system to achieve forced lubrication and cooling, preventing component wear due to dry friction and extending service life.

  
  

Product Highlights

• High Wear Resistance: Copper bushings are made of wear-resistant alloy materials, combined with lubricating oil film protection, with a service life increased by more than 30% compared to ordinary components, suitable for long-term operation under complex working conditions.

• Easy Maintenance: Modular design allows for quick replacement of wearing parts such as copper bushings without overall disassembly of the main engine. Combined with the equipment's overall maintenance channel design, it reduces downtime for maintenance.

• Strong Stability: The transmission gear adopts high-precision meshing design, featuring low operating noise (≤85dB) and small vibration amplitude, ensuring the equipment stably produces products with uniform particle size for a long time.

• High Versatility: Suitable for all models of the HPL Series, with standardized core dimensions. Spare parts can be used across models, reducing customer inventory costs.

Application Scenarios and Advantages

Application Scenarios

Widely used in medium and fine crushing operations in industries such as mining, construction aggregates, and metallurgy. It can process various hard materials including granite, basalt, iron ore, and limestone. Especially suitable for continuous high-load operation scenarios such as large open-pit mines and construction aggregate production lines, cooperating with HPL Series cone crushers to meet large-scale production needs.

Application Advantages

• Cooperating with the overall laminated crushing principle of the equipment, the optimized eccentric motion trajectory can reduce material over-crushing, resulting in uniform finished product particle size with needle-like and flake-like content ≤10%.

• Adaptable to complex working conditions such as high temperature and high humidity. The sealing assembly and lubrication system work together to achieve excellent dustproof and waterproof performance, maintaining stable operation in tropical mines and open-air operation scenarios.

• Fast spare parts supply: Relying on SHILONG's global service network, domestic customers can receive goods within 24-48 hours, and overseas markets (major export regions such as India, Vietnam, and Peru) can be delivered within 7-15 days, ensuring continuous equipment operation.

Maintenance and Replacement Recommendations

• Regular Inspection: Check the fit clearance between the eccentric sleeve and copper bushings (normal clearance ≤0.3mm) and the cleanliness of the lubricating oil every 1000 operating hours to avoid wear caused by impurities.

• Lubrication Requirements: Use 32#/46# anti-wear hydraulic oil and regularly replace the lubricating oil filter element (recommended every 3000 operating hours) to ensure unobstructed oil circuits.

• Replacement Cycle: Under normal working conditions, the service life of the eccentric sleeve body is ≥8000 hours, and the replacement cycle of copper bushings is 6000-8000 hours, which can be adjusted according to material hardness and operating load.

• Replacement Specifications: During replacement, calibrate the eccentricity and gear meshing clearance to ensure assembly precision. After replacement, run the equipment idly for 5-10 minutes before feeding materials if no abnormalities are detected.

Quality Assurance

The eccentric sleeve assembly of SHILONG HPL Series cone crushers is produced in strict compliance with the ISO 9001:2015 quality management system standard. All components undergo factory inspection and bench testing to ensure they meet the equipment operation requirements. Relying on the company's sound after-sales service system, it provides technical support such as component installation guidance and fault diagnosis, as well as continuous spare parts supply guarantee, helping customers reduce operation and maintenance costs and improve equipment operation efficiency.