CBHC External Gear Pump
1. Product Overview
CBHC external gear pump is a fixed displacement high-pressure external meshing hydraulic gear pump. It adopts floating axial clearance automatic compensation structure and radial pressure balance mechanism, effectively reducing internal leakage and maintaining high volumetric efficiency under long-time continuous operation.
Multiple configurations are optional, including drive shaft form, mounting flange, oil port arrangement and rotation direction. It can be used as interchange spare parts for mobile engineering machinery and general hydraulic equipment maintenance.
Model Code Explanation
- CBHC: Series code of external meshing high-pressure gear pump
- C: Structural specification code representing installation dimensions and structural form
2. Main Technical Parameters
Item Specification
Pump Type Fixed displacement external meshing hydraulic gear pump
Rated Working Pressure 20 MPa
Maximum Peak Pressure 25 MPa
Operating Speed Range 600 ~ 2800 rpm
Volumetric Efficiency ≥92% under rated working condition
Housing Material High-strength cast aluminum alloy
Shaft Form Flat key shaft; spline shaft optional
Oil Port Connection Thread connection
Applicable Fluid ISO VG46, VG68 anti-wear hydraulic oil
Operating Temperature -20℃ ~ +80℃
Standard Seals NBR; FKM high-temperature seals optional
3. Working Principle
The driving shaft drives a pair of meshing gears to rotate inside the pump cavity. Vacuum is generated on the suction side to suck hydraulic oil. The gears deliver hydraulic oil to the pressure side and transport pressurized oil into the hydraulic circuit.
The floating compensation plate automatically compensates axial clearance caused by friction wear, suppresses internal leakage and ensures stable working performance under continuous operation.
4. Core Advantages
1. Axial automatic clearance compensation structure, low internal leakage and stable volumetric efficiency.
2. Lightweight aluminum alloy pump body, compact layout, convenient installation and maintenance.
3. Stable operation with low vibration and low noise.
4. Good anti-pollution performance, adaptable to various harsh working conditions.
5. Complete installation specifications to meet diverse equipment matching requirements.
6. High cost performance, ideal aftermarket replacement gear pump.
5. Application Range
This hydraulic gear pump serves as the power source of hydraulic systems, widely used in forklifts, small loaders, road rollers, sanitation vehicles, agricultural machinery and general hydraulic power units.
6. Common Faults & Replacement Suggestion
Typical failures: Insufficient output flow, unable to reach rated pressure, shaft seal oil leakage, abnormal running noise.
First check hydraulic oil cleanliness and filter element condition. Replace the complete gear pump assembly if gears, shaft sleeves and compensation plates suffer severe wear.
