CBHE External Gear Pump
1. Product Overview
CBHE external gear pump is fixed-displacement high-pressure external meshing hydraulic gear pump belonging to CBH series. It adopts high-strength aluminum alloy housing, equipped with floating axial clearance automatic compensation structure and radial pressure balance mechanism. The pump effectively reduces internal leakage and maintains high volumetric efficiency under continuous heavy-load operation.
Multiple configurations are optional, including drive shaft type, mounting flange, oil port layout and rotation direction. It serves as interchangeable spare parts widely used for mobile machinery and general hydraulic equipment maintenance.
Model Code Explanation
- CBHE: Series designation of external meshing high-pressure gear pump
- E: Structure specification code, defining installation dimension 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 pump cavity. Vacuum generates on suction side to draw hydraulic oil. The gears convey hydraulic oil to pressure side and deliver pressurized oil into hydraulic circuit.
The floating compensation plate automatically compensates axial clearance caused by friction wear, restrains internal leakage and guarantees stable performance during long-hour continuous operation.
4. Core Advantages
1. Axial automatic clearance compensation design, low internal leakage and stable volumetric efficiency.
2. Lightweight aluminum alloy pump body, compact layout, convenient installation and overhaul.
3. Smooth operation, low vibration and low running noise.
4. Strong anti-pollution performance, adaptable to various complex construction working conditions.
5. Complete installation specifications to satisfy diverse matching requirements.
6. Excellent cost performance, ideal aftermarket replacement gear pump.
5. Application Range
This hydraulic gear pump provides power source for hydraulic systems, widely applied in forklifts, small wheel 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.
Check hydraulic oil cleanliness and filter element status firstly. Replace complete gear pump assembly when gears, shaft sleeves and compensation plates suffer severe wear.
