INDUSTRY COMPONENT

Blades

Blades are aerodynamic components in impellers and fans that convert rotational energy into fluid flow or pressure.

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Component Specifications

Definition
Blades are precision-engineered components integral to impellers and fans, designed with specific airfoil profiles to efficiently move air or gases. They operate by creating pressure differentials through rotational motion, with their geometry (angle, curvature, length) determining performance characteristics like flow rate, pressure generation, and efficiency. In industrial applications, blades must withstand mechanical stresses, thermal variations, and corrosive environments while maintaining dimensional stability.
Working Principle
Blades work on aerodynamic principles: as they rotate, the curved surface creates lower pressure on one side and higher pressure on the other, generating lift forces that propel fluid. The angle of attack and blade profile determine whether the device operates as an axial fan (moving fluid parallel to the shaft) or centrifugal fan/impeller (accelerating fluid radially outward). Energy transfer occurs through momentum exchange between the rotating blades and the fluid medium.
Materials
Common materials include aluminum alloys (for lightweight applications), stainless steel (for corrosion resistance), titanium (for high-temperature environments), engineered plastics like PEEK or reinforced nylons (for chemical resistance), and composite materials (for specialized performance). Material selection depends on operating temperature (-40°C to 400°C range), corrosion requirements, mechanical strength needs (typically 200-1000 MPa yield strength), and weight constraints.
Technical Parameters
  • Blade Angle 15-45 degrees adjustable
  • Blade Count 3-12 blades typical
  • Chord Length 50-300 mm
  • Flow Capacity 100-50000 m³/h
  • Pressure Range 0.5-15 kPa
  • Surface Finish Ra 1.6-3.2 μm
  • Rotational Speed 500-3600 RPM
  • Balance Tolerance G2.5 per ISO 1940
Standards
ISO 5801, ISO 13349, DIN 24163, AMCA 210

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Blades.

fan blades impeller blades industrial blades aerodynamic blades ventilation components HVAC blades centrifugal fan blades axial fan blades blade materials blade specifications Blades Blades in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Impeller/Fan

Rotating component that moves air or gas within an air blower/damper system.

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Impeller/Blade Assembly

The rotating assembly that generates airflow in a circulation fan

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Fan Impeller/Blade Assembly

The rotating assembly that generates airflow in a fan system

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Engineering Analysis

Risks & Mitigation
  • Imbalance causing vibration
  • Fatigue failure from cyclic loading
  • Corrosion in harsh environments
  • Erosion from particulate matter
  • Resonance at critical speeds
FMEA Triads
Trigger: Material fatigue from cyclic stress
Failure: Crack propagation leading to blade fracture
Mitigation: Regular non-destructive testing (NDT), proper material selection with adequate fatigue strength, stress relief treatments
Trigger: Corrosive environment exposure
Failure: Material degradation and thickness reduction
Mitigation: Corrosion-resistant coatings, material upgrades (stainless steel/composites), environmental controls
Trigger: Foreign object damage (FOD)
Failure: Blade deformation or imbalance
Mitigation: Install protective screens, regular intake inspections, FOD prevention programs

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.5 mm dimensional tolerance, ±0.1° angular tolerance, G2.5 balance grade per ISO 1940
Test Method
Performance testing per ISO 5801, vibration analysis per ISO 10816, material verification per ASTM standards, NDT (ultrasonic/penetrant testing) for defect detection

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What factors determine blade efficiency?

Blade efficiency depends on airfoil design, surface smoothness, tip clearance, angle of attack, and material properties. Computational fluid dynamics (CFD) optimization typically achieves 75-92% efficiency in industrial applications.

How often should blades be inspected?

Visual inspections every 3 months, vibration analysis every 6 months, and detailed dimensional checks annually. High-speed applications (>1800 RPM) require more frequent monitoring.

Can damaged blades be repaired?

Minor damage can be repaired through precision welding and rebalancing, but severely damaged blades typically require replacement to maintain system integrity and safety.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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