Patent ID: 11873820
Assignee: REGAL BELOIT AMERICA, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A blower comprising:
a blower housing;
an impeller within the blower housing, the impeller being rotatable about an impeller axis, the impeller axis defining perpendicular axial and radial directions, the impeller having a backplate and impeller blades extending axially forward from the backplate, the backplate including a backplate back surface region, the backplate back surface region facing axially rearward, the impeller blades having radially outer ends that combine to define an impeller outer circumference, the impeller outer circumference having an impeller outer diameter;
an exhaust pressure static tap;
the backplate back surface region having a first axial end and a second axial end, the second axial end being axially rearward of the first axial end, the first axial end of the backplate back surface region having a first circumference and a first diameter, and the second axial end of the backplate back surface region having a second circumference and a second diameter, the first diameter being greater than the second diameter, the backplate back surface region converging radially inwardly as the backplate back surface region extends axially rearwardly from the first axial end toward the second axial end;
the blower housing having a scroll back wall axially rearward of the impeller and a scroll front wall axially forward of the impeller, the scroll back wall having a scroll back wall front surface region facing the backplate back surface region, the backplate back surface region having a shape, the scroll back wall front surface region having substantially the same shape as the backplate back surface region, the backplate back surface region being spaced axially forward from the scroll back wall front surface region to form a generally uniform axial gap extending from the backplate back surface region to the scroll back wall front surface region;
the scroll back wall having an exhaust pressure static tap opening adjacent the axial gap, the exhaust pressure static tap being connected to the exhaust pressure static tap opening.