CBVH Triple External Gear Pump

CBVH Triple External Gear Pump Full Product Introduction

 

1. Basic Product Overview

 

The CBVH Triple External Gear Pump is an integrated three-unit combined Hydraulic gear pump with a common driving shaft, developed based on mature high-pressure external meshing gear pump technology. Unlike a standalone single Hydraulic gear pump that only serves one oil circuit, this triple-pump structure incorporates three independent gear pump modules within one unified pump housing. It can deliver hydraulic oil with different flow rates and pressure parameters to three separate branches in an intricate hydraulic system through one power input. It commonly configures one high-pressure large-displacement main pump plus two low-pressure small-displacement auxiliary pumps to respectively power main working actuators, steering loops and pilot control circuits. Widely equipped on medium and large wheel loaders, asphalt pavers, road rollers, heavy-duty agricultural harvesters and special engineering machinery, it serves as an all-in-one hydraulic power source to streamline the overall piping arrangement of host equipment.

 

Model Code Explanation

 

- CBV: Core series designation for high-pressure combined external meshing gear pump

- H: Reinforced heavy-duty structural version with upgraded bearings and thickened pump casing

- Triple: Three integrated pump sections sharing one drive shaft, each with independent oil inlet and outlet ports, free from mutual oil flow interference

Every pump segment supports customized displacement and pressure grade matching to satisfy diversified loop configuration requirements of the hydraulic system.

 

2. Core Technical Parameters

 

Item Specification 

Product Type Three-in-one Combined External Meshing Hydraulic gear pump 

Rated Working Pressure Main pump section: 20MPa; two auxiliary pump sections: 12–16MPa 

Instant Peak Pressure Main pump section: 25MPa; auxiliary pump sections: 19MPa 

Rotational Speed Range 700–2400rpm 

Displacement Setting Each pump section customizable individually 

Pump Body Material Nodular cast iron integral housing, carburized quenched alloy steel precision gears 

Core Structure Floating pressure compensation side plates, heavy-duty roller bearings 

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

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

Operating Temperature -20℃ ~ +90℃ 

Mounting Form Standard SAE flange mounting, engine PTO direct drive 

Volumetric Efficiency Single section ≥92% 

Warranty Period 1 year 

 

3. Structure & Working Principle

 

Composed of a shared main drive shaft, three groups of driving/driven gear pairs, separated pump cavities, floating side plates, heavy-duty bearings and independent high/low-pressure oil ports for each section, this assembly acts as the centralized oil supply core of the complete hydraulic system:

 

1. External power drives the common main shaft to rotate synchronously, all three gear sets run simultaneously, and each suction chamber generates negative pressure to draw hydraulic oil from the reservoir.

2. Each pump section transports pressurized hydraulic oil to its exclusive branch pipeline of the hydraulic system respectively. The high-pressure main pump drives boom, bucket and other main hydraulic cylinders or hydraulic motors, while the two auxiliary pumps supply oil for hydraulic steering, multi-way valve pilot control and transmission lubrication circuits.

3. Each segment adopts the same floating side plate automatic clearance compensation mechanism as a standard single Hydraulic gear pump, offsetting axial wear during operation to cut internal leakage and sustain stable working efficiency for every circuit.

4. The three hydraulic loops operate in parallel without hydraulic oil cross-flow, executing multiple mechanical movements synchronously; return oil from all circuits converges back to the oil tank to complete circulation.

5. The integrated single-shaft design eliminates redundant transmission parts, lowering mechanical friction and power consumption compared to installing three separate Hydraulic gear pump units in tandem.

 

4. Core Product Advantages

 

1. Three-section integrated structure replaces three discrete Hydraulic gear pump units, greatly simplifying the complex piping layout of composite hydraulic system, saving installation space and assembly labor costs.

2. Independent customization of pressure and displacement for each pump section enables precise power allocation to match different actuator loads, avoiding unnecessary energy loss.

3. Inherits heavy-duty cast iron housing and floating side plate compensation design, featuring outstanding contamination resistance and overload capacity, adapting to dusty construction sites and mining working conditions.

4. Unified flange mounting interface allows integral plug-and-play replacement during overhaul, with no large-scale reconstruction required for the original hydraulic system.

5. Synchronous shaft rotation guarantees consistent operating rhythm of all three hydraulic branches, preventing jitter and asynchronous action of executive components in the hydraulic system.

6. Modular structure supports later parameter adjustment of individual pump sections, convenient for equipment modification and function expansion.

 

5. Typical Application Scenarios

 

1. Integrated oil supply Hydraulic gear pump for medium-large wheel loaders’ complete hydraulic system: main section for working devices, two auxiliary sections for steering and pilot control;

2. Hydraulic power assembly for pavers, road rollers driving vibration motors, walking mechanisms and auxiliary actuators;

3. Large combine harvesters, forestry engineering machinery equipped with three independent hydraulic functional branches;

4. Custom special engineering machinery and mining auxiliary equipment compound hydraulic system configuration;

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

 

6. Fault Replacement Instructions

 

Replace the whole CBVH triple pump assembly if any branch suffers pressure drop, insufficient flow, cross-circuit oil leakage, abnormal metal knocking noise or oil seepage at the shaft seal and flange surface. Common faults include gear abrasion of individual sections, floating side plate scuffing, main shaft deformation and seal aging failure.