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
ParameterTypical rangeNotes & selection driver
Blade Angle15-45 degrees adjustable
Blade Count3-12 blades typical
Chord Length50-300 mm
Flow Capacity100-50000 m³/h
Pressure Range0.5-15 kPa
Surface FinishRa 1.6-3.2 μm
Rotational Speed500-3600 RPM
Balance ToleranceG2.5 per ISO 1940

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 5801, ISO 13349, DIN 24163, AMCA 210

Parent Products

This component is used in the following industrial products

Impeller/Fan

The impeller/fan is a rotating component used in air blower and damper systems to generate airflow or pressure.

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Impeller/Blade Assembly

The impeller/blade assembly is a critical rotating component within a circulation fan, consisting of blades mounted on a central hub.

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Fan Impeller/Blade Assembly

The fan impeller/blade assembly is a critical component of the fan section, consisting of blades mounted on a hub that rotates to move air or gas.

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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

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Blades

Manufacturer profiles associated with Blades.

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Seal Groove
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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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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