Quality - USHA NEUROS TURBO LLP

Performance Test

Each blower core unit is put through a performance test on one of our cutting-edge test rigs in accordance with industry standards. Every year, turbomachinery design, manufacture, and service are accredited in accordance with ISO 9001 and ISO 14001. The performance test processes are carried out on a regular basis in accordance with ASME, ISO, and API international standards.

Depending on the operating point, each blower runs for 3 to 10 hours at its maximum design load during the test. Following are the objectives that the test processes, which have been refined through decades of testing tens of thousands of turbo blowers, must achieve.
Provide data for the quality approval over the complete operational range that has been specified.
Provide specific and statistical statistics as feedback for the automated power-saving programme using variable element technology.
Compliant with ISO 5389:2005, PTC 10-1997

Overspeed Spin Test

The Objectives of Overspeed Spin Test

1. Overspeed Spin Test

Even during the intended lifespan, rotating components that rotate rapidly, such as impellers, turbine wheels, fans, etc., may unexpectedly burst due to material flaws and high levels of stress from centrifugal loading. An excellent way to ensure product quality is to do an overspeed spin test on a rotating component. The test, which serves as the last stage of inspection, can identify not only potentially hazardous microdefects in the material but also inappropriate material application, omission of the heat-treating procedure, and localized metal structural weakness. Overspeed Spin Test is crucial for items that need to meet high standards of safety. Structural integrity of Neuros impeller is verified by a Spin Test at a rotational speed of 120%.

2. Low Cycle Fatigue (LCF) Test

This test is necessary to regulate and ensure the longevity of spinning components that experience cyclic loads. The spin tester simulates the cyclic operating condition in this test.

3. Burst Test

This test checks the real burst point and safety factor by increasing the rotational speed until the spinning portion bursts. This test is often carried out during the research and development stage and is crucial for goods whose failure could result in significant property loss and/or serious human injury.

4. Strength Improvement

Rotate the component at a high rate of speed prior to finishing machining to ensure that the yielding regime is reached for the rotating component, which is typically the rotor bore. The component's strength is increased by this method.

Rotor Diameter Max. 500mm
Rotor Length 515mm (including mandrel)
Rotor Weight 50kg (including mandrel)
Test Speed Max. 125,000 rpm up to 50kg & Max. 200,000 rpm up to 10kg (including mandrel)

Vibration Test

Model Test

Mode shape and natural frequencies
Sensors, including laser, stroboscope, and accelerometers

Fatigue Test

High Cycle Fatigue Test (HCF) of structure
Examples: Endurance limit of blade and vane

Vibration Environment Test

Simulation of the actual dynamic environment, including shock and vibration
Vehicle, railroad, aeroplane and ship parts

Exciter Type

Model	5500LS(TIRA)
Type	Electromagnetic
Nominal Force	4000 / 4000 / 8000 N(Sine / Random / Shock)
Frequency Range	2~3,000 Hz
Amplitude(p-p)	50.8 mm
Max. Velocity	1.7 / 1.7 / 2.0 m/s (Sine / Random / Shock)
Max. Acceleration	54 g
Max. Test Load	100 kg
Suspension Stiff.	50 N/mm

Balancing

Objective of Overspeed Spin Test

Even when rotating pieces are produced as accurately as possible, in most situations the geometric centre and the centre of mass do not coincide because of machining tolerance and material nonuniformity. Since imbalance force is a typical cause of vibration in rotating machinery and its intensity is proportional to the square of rotational speed, it is only natural that a freshly constructed rotor will have some of it. However, the unbalanced force needs to be kept under control by balancing in order to prevent it from impairing the dynamic stability of the rotor-bearing system, shortening the lifespan of the bearing supports, and generating abnormal noise and vibration. The process of balancing involves adjusting the difference between the geometric centre and the centre of mass of rotors.

Soft Bearing Type

Model: BT 25/50 Bench Balancer
Manufacturer: Heins Balancing

Systems, Inc (USA)

Purchased in 2003
Weight of rotor
Small range: 14g ~ 9kg
Middle range: 224g ~ 27kg
Max. length of rotor: 813mm
Max. diameter of rotor: 610mm
Balancing Precision: Grade 0.4 (ISO 1940)

Hard Bearing Type

Model: H100BT
Manufacturer Koeng., Co. Ltd
Purchased in 2008
Weight of rotor: 0.5g ~ 150kg
Max. distance between supporting point: 1,300mm
Min. distance between supporting point: 10mm
Max. diameter of rotor: 735mm
Balancing Precision: 0.2g.mm (ISO 2953)
Rotor Rotation: 200 ~ 5,000 RPM

Balancing Condition: Compliant with ISO 1940/1