Say Goodbye to Noise with Silent Helical Gear Pumps

Hydraulic pumps transform stillness into motion, breathing life into every corner they touch, becoming the heart of machines and driving energy to the furthest points of the system.

With evolving needs, modern hydraulic pumps are expected to be not only more efficient, durable, and compact but also silent. Silent pumps play a strategic role in minimizing noise.

Hydraulic technologies have evolved to provide innovative solutions that minimize noise pollution, responding to this need.

Some industries are particularly noisy due to high vibration levels in the industrial machinery they use, exposing workers to dangerous decibel levels. In countries where maximum noise levels in the workplace are restricted by laws and regulations for occupational health and safety, the noise levels of machinery have been brought under control.

Helical gear pumps, designed for situations where silent operation is critical, prevent noise pollution and ensure comfort for workers with their low noise levels.


Factors That Cause Noise in Hydraulic Gear Pumps

In hydraulic gear pumps, we can identify the following factors contributing to noise:

  1. Flow Shock: The gear traps oil between itself and the housing, transferring it to the pressure side. As the gear enters the gear spaces, the trapped oil is released, completing the oil transfer. The key issue here is how much of the trapped oil is returned to the suction side after being discharged. This phenomenon, known as backlash, creates flow shock. As flow shock increases, so does the noise level.

  2. Frequency: Another factor contributing to noise in the gear is the frequency of the flow shock. The greater the frequency, the higher the noise level.

  3. Gear Profile Surface Quality: The surface quality of the gear profiles is another factor affecting noise. As the surface quality improves in terms of smoothness, noise levels improve as well.
helical gear pump, silent pump

How Do New-Generation Helical Gear Pumps Achieve Silence?

Helical gears have a different design from traditional gears to eliminate factors causing noise. Thanks to their special gear geometries, they operate with minimal vibration to achieve low noise levels. By reducing backlash to nearly zero, they lower flow shock and frequency values.

The noise produced by a helical gear pump is perceived as less disturbing and more tolerable by the human ear.


Applications of Helical Gear Pumps

Known for their silent operation, helical gear pumps deliver top performance in industries and applications where noise levels and comfort are critical. They are the ideal choice for equipment like forklifts, telehandlers, injection machines, and band saws, where reducing noise is key.


Key Advantages of Silent Helical Gear Pumps

Contribution to Environmental Protection: By reducing noise pollution, they align with environmental standards and contribute to sustainability.

Comfortable Work Environments: They enhance worker comfort, increase job satisfaction, and boost productivity by improving concentration.

Reduced Heating: Thanks to their design, helical gears generate less vibration and friction, reducing heat buildup in machinery.


At Blue Ascend Hydraulics, our Helical Gear Pumps, operating at a noise level of 55 dB, provide the silent operation you expect from your machines and equipment. Considering that normal conversation is around 60 dB, 55 dB is impressively low for a hydraulic gear pump.

Whether in aluminum or cast body options, our Helical Gear Pumps are ideal for any application or equipment where silent operation is essential, from mobile to heavy-duty equipment.


Our expert team is ready to assist you in selecting the most suitable helical gear pump for your equipment.