CBKP Triple External Gear Pump

CBKP Triple External Gear Pump Full Product Introduction

 

1. Basic Product Overview

 

The CBKP Triple External Gear Pump is a high-integration three-section combined Hydraulic gear pump with a shared main drive shaft, specially optimized for heavy-duty construction machinery. Different from a single independent Hydraulic gear pump that only supplies one oil circuit, this triple-unit integrated structure integrates three sets of external meshing gear assemblies inside one overall pump housing, realizing one power input to output three groups of hydraulic oil with customizable displacement and pressure parameters. It commonly matches a high-pressure large-displacement main pump section plus two low-pressure auxiliary pump sections to serve main working circuits, steering power circuits and pilot control circuits respectively, simplifying the complex piping layout of heavy-duty integrated hydraulic system. It is a standard OEM matching and aftermarket replacement pump for mobile cranes, large wheel loaders, heavy dump trucks, road rollers and mining auxiliary machinery .

 

Model Code Explanation

 

- CBK: Basic series code for high-pressure combined external meshing gear pump for engineering machinery

- P: Upgraded heavy-duty version with liquid extruded high-strength housing, reinforced roller bearings and radial balance bushings

- Triple: Three pump sections coaxially integrated, each equipped with independent suction and pressure oil ports without cross-circuit oil leakage

Each segment supports free combination of displacements (32/40/50/63/80/100mL/r mainstream specifications), with clockwise/counterclockwise rotation and multiple shaft types optional[(Xian Victo...)].

 

2. Core Technical Parameters

 

Item Specification 

Product Type Coaxial Triple Combined External Meshing Hydraulic gear pump 

Rated Working Pressure Main pump section: 20MPa; 2 auxiliary pump sections: 12–16MPa 

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

Rotational Speed Range 700–2400rpm 

Displacement Combination Custom matched per segment: 32/40/50/63/80/100mL/r optional 

Pump Body Material Liquid extruded high-strength aluminum alloy main housing, cast iron end covers; carburized quenched alloy steel precision gears[(THMHuade)] 

Core Structure Floating side plate axial clearance automatic compensation, radial balance bushings, heavy-duty roller bearings + 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 SAE standard flange mounting, engine PTO direct drive; tail reserved auxiliary support screw hole[(THMHuade)] 

Volumetric Efficiency Single section ≥92% 

Warranty Period 1 year 

 

3. Structure & Working Principle

 

This assembly consists of a shared main drive shaft, three groups of driving/driven gear pairs, segmented independent pump cavities, floating compensation side plates, heavy-duty bearings and separate oil ports for each section, acting as the centralized multi-circuit oil supply core of the whole hydraulic system:

 

1. External power drives the common main shaft to rotate synchronously, all three gear groups operate simultaneously; each suction cavity generates negative pressure to draw hydraulic oil from the shared reservoir.

2. Every pump section delivers pressurized hydraulic oil to its exclusive branch pipeline of the hydraulic system: the high-pressure main pump drives boom, bucket and other heavy-load hydraulic cylinders or walking hydraulic motors; the two small-displacement auxiliary pumps supply oil for hydraulic steering, multi-way valve pilot control and transmission box lubrication circuits.

3. Each segment adopts the mature floating side plate compensation structure of standard single Hydraulic gear pump, automatically offsetting axial wear clearance under working pressure to minimize internal leakage and maintain long-term stable volumetric efficiency.

4. Three hydraulic branches run in parallel with independent oil passages, no mutual oil interference, enabling synchronous execution of multiple mechanical actions; all return oil converges back to the oil tank to complete circulation.

5. Coaxial integrated design eliminates redundant transmission components, reducing mechanical friction and power loss compared to installing three separate Hydraulic gear pump units in tandem.

 

4. Core Product Advantages

 

1. Three-section coaxial integration replaces three discrete Hydraulic gear pump units, greatly simplifying complicated pipeline layout of heavy-duty compound hydraulic system, saving installation space and assembly labor costs .

2. Independent displacement and pressure customization for each pump section realizes refined power distribution, matching different actuator load demands to reduce idle energy consumption.

3. Liquid extruded high-strength housing + reinforced roller bearing configuration delivers outstanding anti-overload and anti-pollution capacity, adapting to dusty mining and rugged construction site environments .

4. Radial balance bushing design lowers gear eccentric wear, extending service life in frequent start-stop and impact working conditions.

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

6. Diversified shaft types (flat key, rectangular spline, SAE involute spline) and rotation directions are compatible with most domestic and imported mainframe installations[(Xian Victo...)].

 

5. Typical Application Scenarios

 

1. Core integrated oil supply Hydraulic gear pump for mobile truck cranes and large wheel loaders’ complete hydraulic system: main pump for hoisting/loading action, two auxiliary pumps for steering and pilot control;

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

3. Heavy dump trucks, mining underground haulage vehicles multi-functional hydraulic power unit;

4. Equipment renovation upgrade: replace scattered single pumps to streamline overall hydraulic pipeline layout of old machinery.

 

6. Fault Replacement Instructions

 

Replace the entire CBKP triple pump assembly if any branch suffers pressure drop, insufficient flow, inter-circuit cross oil leakage, continuous metal grinding abnormal noise or oil seepage at shaft seal and flange surface. Common failure causes include gear tooth surface abrasion of individual sections, floating side plate scuffing, main shaft bending deformation, bearing burnout and seal aging cracking.