Test method for Determination of sound power levels of hydraulic motors

Test method Determination of noise emitted by hydraulic motorsprovides useful information to determine priority measures for noise control; control equipment condition, early detection of signs and causes of failure... to proactively maintain machinery; production – effective product improvement...

Overview of Test Method Determination of noise emitted by hydraulic motors

Test method name: Determination of noise emitted by hydraulic motors

Test method:

ISO 4412-2:1991: Hydraulic fluid power – Test code for determination of airborne noise levels – Part 2: Motors[1].

ISO 3745:2003: Acoustics – Determination of sound power levels of noise sources using sound pressure – Precision methods for anechoic and hemi-anechoic rooms

Performed at: Anechoic Room, DASM Institute of Acoustics

1. Objectives and test subject

– Test objectives

Determine the airborne noise level of hydraulic motors.

– Test subject

Hydraulic motors.

– Explanation and description of hydraulic motors

For simplicity, we can understand the working mechanism of a hydraulic motor as completely opposite to a hydraulic pump. The motor converts the energy of high-pressure hydraulic oil flow into the rotational motion of the motor output shaft, which in turn rotates the actuators.

In the list of test methods, test 38 (ISO 4412-1:1999) refers to the determination of noise emitted by hydraulic pumps. The pump is the power source of the hydraulic system.

Similar to hydraulic pumps, hydraulic motors are also very complex test subjects because they operate within an inseparable system. Noise sources generated from other subjects are very large, for example: pumps, valves, pipelines, machine working equipment, operating parts, machine frames. According to ISO 4412-2:1999, the test for noise emitted by hydraulic motors is carried out in an anechoic room.

2. Experimental procedure

Steps to perform:

• Equip fully with devices, microphones, and test samples.
• Perform sample measurement.
• Process and report results

3. Notes

• The recommended number of measurement points is 10.
• Details of airborne sound insulation and structure-borne sound insulation for parts connected to hydraulic motors inside the anechoic room must be implemented according to standards.

Role – importance of the Test Method Determination of noise emitted by hydraulic motors

The Test Method Determination of noise emitted by hydraulic motors performed by DASM Institute of Acoustics helps provide useful information, meeting all practical needs of customers and businesses wishing to:

• Control noise, prevent noise, isolate noise sources, implement mitigation measures to avoid health and safety risks and avoid negative impacts on the surroundings.
• Measure the working environment and assign appropriate work tasks. Train workers exposed to a noisy environment to clearly understand the hazards of noise and safe working measures.
• Control equipment condition, early detect signs and causes of failure... to proactively maintain machinery.
• Control quality during production, optimize research and development of products, materials helping sound reduction, noise control, sound absorption, sound insulation... related to noise emitted by hydraulic motors.
• Material manufacturers, design – consulting units... of hydraulic motors wanting to achieve the purpose of noise reduction, sound absorption, effective sound insulation...
• Commercial/consulting businesses have authentic basis to propose and execute solutions prioritizing types of machinery, equipment, appropriate technical-technological initiatives capable of mitigating the influence of noise.
• Support legal dispute issues, lawsuits, expert appraisal requisitions, measurement and analysis of environmental samples in cases of noise violations exceeding environmental technical standards.

At the same time, DASM will carry out consulting and design work to create shape/structure/material solutions to adjust customer test samples in a streamlined, effective, and cost-saving manner (in case of non-compliance).

If previously you still had some worries and concerns and had to spend many fees for similar activities abroad, now you just need to contact DASM. The entire remaining process will be proactively and comprehensively carried out by us in the fastest time to complete customer experience about us: DASM provides acoustic consulting services with truly superior quality, most competitive prices in the industry along with dedicated and attentive customer care policies.

Significance of acoustic testing services at DASM

Today's globalized commercial life opens up countless new markets and supply sources across five continents. Accompanied by international regulations and standards helping customers easily assess quality – trace product origin, select suitable/superior items. Especially, they support manufacturers in constantly improving and perfecting technology, techniques, raw materials, production and sales methods... etc...

DASM Institute of Acoustics is a pioneer, comprehensive, professional, and leading prestigious brand in Vietnam in the field of acoustics. On January 12, 2023, DASM was granted certificate number 114/TĐC – HCHQ by the Directorate for Standards, Metrology and Quality (Ministry of Science and Technology), certifying registered testing activities for multi-industry general in the Mechanical-Physical field (registration number: 707/TN – TĐC).

Our acoustic testing service portfolio provides customers with practical professional results to meet sustainability, standard performance, optimal solutions – consulting – design adjustments... for products and services. From there, you will update, meet, and adapt to constantly changing international standards to achieve breakthroughs in revenue, profit, and elevate brand value.

If you have a need to perform material testingto determinethe noise emitted by hydraulic motors, please contact via Hotline for detailed consultation!