A New Generation of Power: Redefining the Low-Noise Gear Pump

Introduction

As electrification sweeps through the industry and traditional internal combustion engines are replaced by electric motors, the operational sound of every single component on electric construction machinery is laid bare. When the tide goes out, it becomes instantly clear who has been swimming naked—and hydraulic components have undeniably become the focus of intense scrutiny.

Traditional gear pumps used in conventional construction machinery typically generate noise levels around 80–90 dB(A), and even standard low-noise gear pumps still hover around 65–70 dB(A). In the era of machinery electrification, this is simply no longer quiet enough.

The Origin of the CBXB Ultra-Quiet Screw Gear Pump Series

With nearly 60 years of deep roots in the hydraulics sector, HCHC possesses a rich reserve of hydraulic technology and an accurate foresight into future market demands. At the very dawn of construction machinery electrification, the CBXB ultra-quiet pump series was already greenlit for R&D. By 2022, it entered small-scale commercial deployment, successfully hitting the market to widespread acclaim.

Building on this success, HCHC has expanded the CBXB ultra-quiet gear pump lineup. To meet the specific demands of the industrial vehicle sector, we developed four dedicated series: CBXB2, CBXB3, CBXB4, and CBXB5. This lineup now covers almost all required displacements under 50 mL/r. Furthermore, for sectors with higher displacement demands—such as petrochemicals, marine & offshore engineering, and electrified heavy machinery—the series can be extended up to 300 mL/r.

Key Features of the CBXB Series: Ultra-Quiet & Energy-Saving

Ultra-Low Noise: The CBXB ultra-quiet screw gear pump utilizes HCHC’s proprietary high-precision helical gear profile parameters. This ensures that the gear profiles move strictly along a single meshing line from start to finish, eliminating fluid trapping and oil chamber squeezing. By drastically reducing vibration, the pump keeps noise levels under 55 dB(A) / 60 dB(A) under rated operating conditions.

High Efficiency & Energy Savings: The scientific design minimizes energy loss, effectively lowering operational costs for users while mitigating noise pollution. Its unique internal structure delivers high load capacity and exceptional reliability. It reduces pressure pulsations and mechanical vibrations during operation without causing energy dissipation.

Variable Speed Performance: Boasting higher volumetric efficiency and energy-saving traits, the CBXB pump can operate efficiently across different speeds under identical throttling conditions.

Technical Parameters

Rated Pressure: 20 MPa

Maximum Pressure: 25 MPa

Speed Range: 300–4000 r/min

Note: Specifications vary slightly across different models. For more detailed product specifications, please contact HCHC at +86-551-64391100.

Product Applications

The CBXB ultra-quiet screw gear pump is perfectly suited for various electric motor-driven hydraulic system scenarios. Beyond industrial vehicles (such as forklifts) and aerial work platforms, it delivers outstanding noise reduction and volumetric efficiency across diverse operating conditions in industrial automation, petrochemicals, and marine & offshore engineering. It provides efficient, stable, and low-noise power support, creating a superior working experience and environment for global customers.