CBHV External Meshing Gear Oil Pump

CBHV External Meshing Gear Oil Pump

2 month ago

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 4 year year

Product details

CBHV External Meshing Gear Oil Pump

1. Product Overview

CBHV external meshing gear oil pump is a fixed displacement high-pressure hydraulic gear pump developed for mobile machinery. It adopts high-strength cast iron housing, equipped with asymmetric double-modulus gear pair, floating axial clearance automatic compensation mechanism and radial hydraulic balance structure.

This pump maintains stable volumetric efficiency under low-speed and heavy-load conditions. Multiple structural options are available, including drive shaft type, mounting flange, rotation direction, as well as oil port layout: side-inlet & side-outlet or optional rear-inlet & rear-outlet version. It serves as reliable interchange spare parts for engineering machinery and mobile hydraulic equipment maintenance.

Model Code Explanation

- CBHV: Series code of heavy-duty external meshing high-pressure gear pump

- Optional configuration: BB = Rear Inlet & Rear Outlet (后进后出 structure)

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 ~ 2600 rpm

Volumetric Efficiency ≥92% under rated working condition

Housing Material High-strength ductile cast iron

Shaft Options Plain key shaft, rectangular spline shaft, SAE involute spline shaft

Oil Port Connection Thread connection / flange connection optional

Oil Port Arrangement Standard side inlet & side outlet; rear inlet & rear outlet customizable

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 forms on the suction side to draw hydraulic oil. The gears transport hydraulic oil to the pressure side and deliver pressurized oil into the hydraulic circuit.

The floating compensation plate automatically compensates axial clearance caused by friction wear. The radial balance structure reduces radial force on gears, suppresses internal leakage and ensures stable flow output during long-term continuous heavy-load operation.

4. Core Advantages

1. Axial automatic clearance compensation design, low internal leakage and stable volumetric efficiency.

2. Cast iron pump body with high structural rigidity, strong shock resistance and overload resistance.

3. Optimized asymmetric double-modulus gear, low vibration, low running noise.

4. Support customized rear-inlet & rear-outlet layout to adapt to special installation space requirements.

5. Excellent anti-pollution performance, suitable for harsh construction site working environments.

6. Rich configuration combinations of shaft, flange and oil port to meet diverse matching demands.

7. High cost performance, ideal aftermarket replacement gear pump for mobile machinery.

5. Application Range

This hydraulic gear pump acts as the power source of hydraulic systems, widely used in forklifts, wheel loaders, road rollers, sanitation vehicles, aerial work platforms, agricultural machinery and other mobile construction machinery.

6. Common Faults & Replacement Suggestion

Typical failures: Insufficient output flow, unable to reach rated pressure, shaft seal oil leakage, abnormal running noise.

Please check hydraulic oil cleanliness and filter element firstly. Replace the complete gear pump assembly when gears, shaft sleeves and compensation plates suffer severe wear.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

4 year

Address: Ningbo, China

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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