INDUSTRY COMPONENT

Pump Rotor/Vanes

Pump rotor/vanes are precision rotating components in vacuum pumps that create suction by displacing air through eccentric rotation within a cylindrical chamber.

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Component Specifications

Definition
The pump rotor/vanes assembly consists of a central rotor mounted eccentrically within a cylindrical stator housing, with multiple sliding vanes (typically 4-12) that extend radially due to centrifugal force and maintain contact with the stator wall. As the rotor rotates, the vanes create expanding and contracting volumes that draw in, compress, and exhaust gases, generating vacuum through positive displacement. This component is critical for maintaining consistent vacuum pressure, flow rates, and energy efficiency in industrial vacuum systems.
Working Principle
Operates on the rotary vane principle: an eccentrically mounted rotor with spring-loaded or centrifugal vanes rotates inside a cylindrical chamber. The vanes slide in and out of rotor slots, creating sealed chambers that expand during intake (drawing in gas) and compress during exhaust (expelling gas). The continuous rotation creates a steady vacuum flow with minimal pulsation.
Materials
Rotor: Hardened steel (AISI 4140/4340), stainless steel (316L), or aluminum alloy (7075-T6) with surface treatments (nitriding, chrome plating). Vanes: Carbon graphite, phenolic resin composites, or PTFE-filled materials for low friction and self-lubrication. Some high-performance versions use ceramic-coated steel vanes.
Technical Parameters
  • Vane Count 4-12 vanes
  • Vacuum Level 10^-3 to 10 mbar
  • Rotor Diameter 50-300 mm
  • Surface Finish Ra 0.4-0.8 μm
  • Rotational Speed 500-3600 RPM
  • Clearance Tolerance 0.02-0.05 mm
  • Operating Temperature -20°C to 120°C
Standards
ISO 21360-1, ISO 21360-2, DIN 28400, DIN 28401

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Pump Rotor/Vanes.

vacuum pump rotor pump vanes rotary vane pump components industrial vacuum parts pump maintenance vacuum system components Pump Rotor/Vanes Pump Rotor/Vanes in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Vacuum Pump/Motor

A combined vacuum pump and motor assembly that generates suction for vacuum extraction systems

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Engineering Analysis

Risks & Mitigation
  • Vane fracture leading to catastrophic pump failure
  • Excessive clearance causing vacuum loss
  • Material incompatibility with pumped media
  • Thermal expansion mismatch
  • Rotor imbalance causing vibration
FMEA Triads
Trigger: Insufficient lubrication or dry running
Failure: Excessive vane and stator wear, overheating
Mitigation: Implement automatic lubrication systems, install low-oil sensors, use self-lubricating vane materials
Trigger: Particulate contamination entering pump
Failure: Abrasive wear on vanes and rotor surfaces
Mitigation: Install proper inlet filters, use cyclone separators, implement regular maintenance schedules
Trigger: Corrosive gases in vacuum stream
Failure: Material degradation and pitting
Mitigation: Select corrosion-resistant materials (stainless steel, special coatings), install gas ballast systems

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Radial runout: ≤0.02 mm, Vane slot clearance: 0.01-0.03 mm, Concentricity: ≤0.015 mm TIR
Test Method
Dimensional inspection via CMM, vacuum performance testing per ISO 21360, material hardness testing (Rockwell C), surface roughness measurement, dynamic balancing to ISO 1940 G2.5

Buyer Feedback

★★★★☆ 4.8 / 5.0 (10 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Pump Rotor/Vanes meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Pump Rotor/Vanes arrived with full certification."

"Great transparency on the Pump Rotor/Vanes components. Essential for our Machinery and Equipment Manufacturing supply chain."

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Frequently Asked Questions

How often should pump vanes be replaced?

Vane replacement intervals depend on operating conditions: typically 2000-8000 hours for standard applications. Contaminated environments or dry running conditions may require more frequent replacement (1000-3000 hours).

What causes premature vane wear?

Common causes include: insufficient lubrication, particulate contamination in the vacuum stream, moisture condensation, improper vane material selection for the application, and operating beyond recommended temperature ranges.

Can different vane materials be mixed in the same rotor?

No. Mixing vane materials can cause uneven wear, imbalance, and reduced vacuum performance. Always use matched sets of identical vane material and dimensions specified by the pump manufacturer.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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