Stator Housing

The stator housing is a critical structural component in primary (roughing) pumps, typically constructed as a cylindrical or multi-chambered casing that houses the stator, rotor, and internal vanes. It maintains precise internal geometries to ensure proper clearance between moving parts, contains the pumped medium, and often incorporates cooling channels, mounting flanges, and port connections. In industrial vacuum systems, it withstands pressure differentials, thermal expansion, and mechanical stresses while maintaining dimensional stability under continuous operation.

The stator housing provides a sealed, rigid enclosure that maintains the stator's fixed position relative to the rotating rotor. During pump operation, it contains the vacuum chamber where gas molecules are trapped and expelled through mechanical displacement (typically via rotary vane, claw, or screw mechanisms). The housing's internal surfaces guide fluid flow, dissipate heat from compression, and ensure minimal clearance gaps to prevent backflow and maintain pumping efficiency.