CBV2/2 Dual External Gear Pump

CBV2/2 Dual External Gear Pump Full Product Introduction

 

1. Basic Product Overview

 

The CBV2/2 Dual External Gear Pump is a compact coaxial identical-specification dual combined Hydraulic gear pump developed by mainstream domestic hydraulic manufacturers (represented by Hefei Changyuan Hydraulic), adopting lightweight high-strength aluminum alloy integrated housing. The marking 2/2 indicates both front and rear pump sections belong to CBV2 identical frame series, with unified pressure grade and optional matched or same displacement configuration. Different from two separate standalone Hydraulic gear pump units, it integrates two sets of external meshing gear assemblies sharing one main drive shaft inside a single pump body, delivering two independent hydraulic oil outputs through one power input. It can simultaneously supply power to two parallel functional branches in compact layout hydraulic system, mostly configured for synchronous working loops or main/auxiliary matching loops of light mobile machinery. It serves as OEM original matching and aftermarket replacement core pump for forklifts, mini loaders, sanitation vehicles, small agricultural machinery and compact hydraulic power packs.

 

Model Code Explanation

 

- CBV: Series code for lightweight high-pressure external meshing gear pump for light-duty mobile equipment

- 2: Frame size No.2, standard small-medium pump body specification

- 2/2: Dual pump combination, front pump and rear pump both adopt CBV2 same frame structure, consistent pressure rating, displacements can be same or customized paired

Optional configurations: flat key / involute spline shaft, clockwise / counterclockwise rotation, threaded / flange oil ports.

 

2. Core Technical Parameters

 

Item Specification 

Product Type Same-frame Coaxial Dual Combined External Meshing Hydraulic gear pump 

Rated Working Pressure Both sections: 20MPa 

Instant Peak Pressure Both sections: 25MPa 

Rotational Speed Range 600–2500rpm 

Displacement Combination Custom pairing: 6/6, 10/10, 16/16, 20/10, 25/16 mL/r etc. 

Pump Body Material High-strength die-cast aluminum alloy integral housing, carburized quenched alloy steel precision gears 

Core Structure Floating side plate axial clearance auto-compensation, radial hydraulic balance structure, DU self-lubricating composite bearings 

Sealing Kit HNBR oil-resistant seals standard; FKM high-temperature resistant seals optional 

Applicable Hydraulic Medium ISO VG46, VG68 anti-wear hydraulic oil 

Operating Temperature -20℃ ~ +90℃ 

Mounting Form Standard oval flange mounting, engine PTO direct drive 

Volumetric Efficiency Single section ≥92% 

Noise Level Low pulsation design, 5–7dB quieter than ordinary straight-tooth gear pumps 

Warranty Period 1 year 

 

3. Structure & Working Principle

 

Consists of shared main drive shaft, two groups of driving/driven gear pairs, independent segmented pump cavities, floating compensation side plates, DU bearings and separate inlet/outlet ports for two sections, acting as dual parallel power source of the whole hydraulic system:

 

1. External power drives the common main shaft to rotate synchronously, two gear sets operate simultaneously, each suction cavity forms negative pressure to suck hydraulic oil from the shared oil tank.

2. Two pump sections output pressurized hydraulic oil to their respective independent pipelines of the hydraulic system: can be used for synchronous dual actuators (double lifting cylinders), or split into main working loop + steering/pilot auxiliary loop. Each circuit runs independently without oil cross-flow interference.

3. Every pump section equips the mature floating side plate compensation mechanism of standard single Hydraulic gear pump, which is pressed against gear end faces by system pressure to compensate axial wear clearance in real time, minimizing internal leakage and maintaining stable efficiency during long continuous operation.

4. After driving executive components to complete actions, return oil from two branches converges back to the oil tank to finish full hydraulic circulation.

5. Integrated coaxial structure eliminates extra connecting brackets and couplings, reducing mechanical friction loss and installation occupation compared to two discrete Hydraulic gear pump installation schemes.

 

4. Core Product Advantages

 

1. CBV2 same-frame 2/2 unified design ensures consistent pressure and stability of two oil circuits, easy to realize synchronous action of double actuators in the hydraulic system.

2. Full aluminum alloy lightweight housing reduces whole machine load, ultra-compact structure fits narrow installation spaces of small machinery, no need to reconstruct mounting positions of the original hydraulic system during replacement.

3. Radial balance + DU self-lubricating bearings lower gear eccentric wear, with good anti-pollution performance adapting to on-site hydraulic oil with tiny impurities.

4. Floating side plate compensation effectively slows efficiency decline caused by gear abrasion, avoiding overall pressure drop of the hydraulic system after long service.

5. Standardized mounting dimensions realize plug-and-play overhaul replacement, compatible with most domestic small engineering machinery OEM assembly standards.

6. Flexible displacement pairing options support equipment modification and loop function expansion.

 

5. Typical Application Scenarios

 

1. Dual-circuit matching Hydraulic gear pump for 1–3 ton electric/internal combustion forklifts’ integrated hydraulic system: one section for gantry lifting, one for side shift or hydraulic steering;

2. Mini wheel loaders, small dumper trucks double functional hydraulic power assembly;

3. Small road sweepers, garbage tricycles and light sanitation equipment hydraulic supply unit;

4. Small agricultural tractors, garden machinery and portable hydraulic power stations;

5. Equipment upgrading: replace scattered single pumps to simplify hydraulic pipeline layout.

 

6. Fault Replacement Instructions

 

Replace the complete CBV2/2 dual pump assembly if either circuit suffers pressure drop, insufficient flow, inter-section cross oil leakage, continuous metal meshing abnormal noise or oil seepage at shaft seal and flange junction. Common failure causes: gear tooth surface abrasion, floating side plate scuffing, DU bearing burnout and sealing aging failure.