Patent ID: 11965517
Assignee: BROSE FAHRZEUGTEILE SE & CO. KOMMANDITGESELLSCHAFT, BAMBERG
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 14:
15. A cooling fan module assembly comprising:
a fan assembly;
a motor coupled to the fan assembly; and
a shroud including a sidewall defining an aperture configured to receive the fan assembly, the motor configured to rotate the fan assembly to route air from an upstream side of the shroud to a downstream side of the shroud, the shroud including a barrel extending from the sidewall, the barrel tapering from the upstream side to the downstream side, the barrel including:
a first ring extending from the sidewall in an axial direction, and
a second ring arranged coaxially with respect to the first ring, the first ring including a first inner peripheral surface, and the second ring including a second inner peripheral surface, the first and second inner peripheral surfaces each including a number of surface discontinuities, the number of surface discontinuities collectively configured to generate turbulent airflow within the barrel to mitigate air flow from moving from the downstream side to the upstream side,
wherein the number of surface discontinuities includes a number of peaks and a number of recesses, each recess of the number of recesses interstitially disposed between two peaks of the number of peaks,
wherein at least some peaks of the number of surface discontinuities of the first inner peripheral surface and at least some peaks of the number of surface discontinuities of the second inner peripheral surface are each arranged to face towards a radial direction, wherein the radial direction is substantially orthogonal to the axial direction.