CBGJ2/2/1 Hydraulic Gear Pump
Model Overview
The CBGJ2/2/1 belongs to a high-pressure gear pump series, featuring dual or triple pump designs (e.g., CBGJ2/2/1 may correspond to a dual-pump structure). Manufactured from high-strength cast iron or aluminum alloy, it integrates proprietary technologies such as axial clearance compensation and radial tracking compensation to achieve high pressure (up to 31.5MPa), wide speed range (0–3000rpm), and low noise (≤65dB). Typical applications include construction machinery (loaders, road rollers, cranes), petroleum machinery, coal mining roadheaders, drilling rigs, and hydraulic power units.
Core Parameters and Technical Features
• Pressure and Displacement: Rated pressure 20–25MPa, maximum pressure 31.5MPa, displacement range 10–320mL/rev (e.g., CBGJ2/2/1 may correspond to a total dual-pump displacement of approximately 20–40mL/rev). Supports multi-stage combinations (e.g., dual or triple pumps).
• Structural Advantages: Adopts external gear design with integrated secondary sealing, large-diameter needle bearings, and fixed bimetal side plates, offering strong impact resistance, excellent pollution tolerance, and compact dimensions (e.g., total length ≤400mm) for confined spaces.
• Efficiency and Noise: Optimized gear tooth profiles and casing flow paths achieve volumetric efficiency ≥92% and noise ≤65dB, reducing noise by 10–15dB compared to traditional gear pumps.
Application Scenarios and Compatibility
• Mainstream Compatible Models: Suitable for LiuGong ZL50G loaders, XCMG road rollers, Changlin excavators, Shandong Shantui bulldozers, and other equipment from brands like Hitachi, Komatsu, and Caterpillar.
• Industry Expansion: Widely used in construction machinery (concrete mixers), mining equipment (roadheaders), oil drilling platforms, port cranes, and agricultural machinery (tractor hydraulic systems).
• Alternative Solutions: Can replace certain models from Rexroth A4VG and Kawasaki K3V series, pending verification of seal dimensions (e.g., shaft diameter, spline type) and oil circuit interface matching. Third-party suppliers (e.g., Qingzhou Jiahe, Jinan Yuanyi) offer compatible parts requiring ISO 9001 certification for quality assurance.
Installation and Maintenance Essentials
• Installation Standards: Precise alignment of the pump body with the host frame is required; bolt tightening torque must meet specifications (e.g., M12 bolts: 80–100N·m) to prevent seal failure. Hydraulic line connections require pressure testing (1.5× operating pressure) to ensure leak-free performance.
• Maintenance Practices: Inspect gear-to-casing clearance every 500 hours; replace if wear exceeds 0.03mm. Repair or replace the port plate if surface scratch depth >0.02mm. Regularly replace hydraulic oil (recommended manufacturer-specific oil) and clean filters to prevent contamination-induced valve jamming.
• Troubleshooting: Low pressure may result from gear wear or seal failure; abnormal noise requires checking bearing lubrication and swashplate drive mechanisms.
