Turbo…Or not Turbo?

Basically, the first question that comes right to our customer's mind is, what is the massive difference between turbo blowers and their common counterparts which is positive displacement blowers (D.P)?

Well, there should be no worries because we have the answer of course not with spice or praise and exaggeration but actually with reliable reasons and statistics!

For that cause, first, we have to explain the parts, structure, and design of turbomachines to make a better concept and understanding of the scheme and the differences between the turbos and the common ones.

The design of aerodynamic centrifugal compressor (impeller) with high performance

Figure (2): Impeller and the spread of stress on its different coordinates

• • The aerodynamic design of the impeller and diffuser plays a key role in function increase
  • Impeller structure integrity has been confirmed to be tested at 120% rotational speed in a rotation test.
  • The most suitable material has been used in high speed for manufacturing parts, Aluminum alloy is the main substance but if customers order, using Titanium and sustainable steel (SUS) or Japan industry of steel (JIS) is possible. It should be noted, the impeller is machined by five-axis CNC devices with 0.001mm tolerance to minimize blade tip cleaning.
  • More integrity results in more life cycle plus longer diameter with an accurate shape of the impeller which will cause an optimal special speed that can increase the function
  • To increase the durability and resistance against corrosion a thick coat of anodizing is put on the impeller

M.S.M (Self-developed Permanent Magnet Synchronous Motor)

Figure (4): Rotor (left side) & Stator (right side)

Neuros Self-Developed Permanent Magnet Synchronous Motor (PMSM) is the most suitable solution for high-speed operations which has been proved to have high efficiency and a power factor of more than 95% with low current drop; Thanks to the direct connection between rotor and impeller (coaxial), the complex weight has been decreased and we have a negligible mechanical loss during operations which is strength point in function increase.

Figure (5) Engine Structure

Engine Technical Specifications

• Power:30-300 HP
• Rotor Speed: 10000-100000 RPM
• Efficiency:95%
• Electronic Factor:90-95
• Polars:2
• Insulation Class: H Class
• Cooling: Air
• Operation: Continues
• Protection Index: IP55

* IP55 engine general protection standard: figure 5 tens: protection against dust intrusion protection against dust and soil penetration into vulnerable parts, figure 5 unit: protection against radial splashing of water in all directions, water eruption

* Thermal class (insulation) of H CL engine: 180'c glass fibers, asbestos with silicone gums, pure silicone varnishes

VFD (Variable Frequency Drive)

With variable frequency drive (VFD), through the control of the rotational speed of the magnetic synchronous motor (PMSM), in order to adjust the pressure and the amount of discharge current, for the customer's needs that in a wide operating range of 45-100% can be energy loss from Destroyed.

Air Bearing

An air bearing is a non-contact compatible bearing that is formed when the air film is automatically generated by the hydrodynamic interaction between the cohesive fluid and the foil structure in a rotating sleeve or disc. These bearings are classified into two types of bump (BUMP) and leaf type (LEAF) based on the foil configuration.

Figure (6) Production of hydrodynamic pressure

As the rotor accelerates, a thin layer of air forms a cushion between the shaft and the bearing surface.

Figure (7) to the right of the leaf model (Leaf) and to the left of the bump model (Bump)

As we mentioned in the introduction, Neuros company, inspired by ACM & ECS technology, has created an amazing innovation in the design of new generation blowers and compressors, namely the use of thrust bearings, which are in the form of thrust bearing and journal. Bearing) is used.

Figure (8) Air Journal Bearings                                                Figure (9) Air thrust bearing

Figure (10) Overview of rotor and impeller connections

Table (1) Comparison of air bearings with conventional bearings