公开(公告)号：WO1993005275A1

公开(公告)日：1993-03-18

申请号：PCT/US1992007377

申请日：1992-08-28

Applicant: AIRFLOW RESEARCH AND MANUFACTURING CORPORATION

Inventor： AIRFLOW RESEARCH AND MANUFACTURING CORPORATION ,  YAPP, Martin, G. ,  VAN HOUTEN, Robert ,  HICKEY, Robert, Ives

IPC: F01D01/02

CPC classification number: F04D29/164 ,  F01D5/141 ,  F04D29/326 ,  F04D29/386 ,  Y02T50/673

Abstract: An improvement to forwardly skewed axial fans (20) where blade chamber and rake are coordinated with skew. The blades (5) are characterized in that a line defined by the points of maximum chordwise camber (fmax) as a function of changing radial position (r) is on the leading edge (LE) side of the mid-chord line (MCL) at values of r, toward the root of the blade (5), and is less forwardly skewed than the leading edge (LE), the mid-chord line (MCL), and the trailing edge (TE). The blade (5) is raked forwardly so that the trailing edge (TE) of the blade tip is axially forward of the trailing edge (TE) at the blade root. As a result, the fan (20) produces a flow that is generally in radial equilibrium, having a reduced component of flow normal to the desired axial flow and normal to the tangential flow. The coordinated fan (20) can be combined with a housing/band (62,66) configuration for controlling airflow that recirculates in a channel (68), formed between the band (66) and the housing (62).

公开(公告)号：WO1991015664A1

公开(公告)日：1991-10-17

申请号：PCT/US1991002221

申请日：1991-03-29

Applicant: AIRFLOW RESEARCH AND MANUFACTURING CORPORATION

Inventor： AIRFLOW RESEARCH AND MANUFACTURING CORPORATION ,  YAPP, Martin, G.

IPC: F01D01/00

CPC classification number: F04D29/4213

Abstract: A space efficient centrifugal blower (10) having a plenum (50) connected to the impeller inlet opening (39). The plenum has at least one plenum inlet (52) positioned to provide airflow from one side of the impeller in a direction generally perpendicular to the impeller axis. A set of airfoil members (57) positioned in the plenum around the impeller inlet have elongated airflow control surfaces extending outwardly from the impeller inlet in a direction generally perpendicular to the impeller axis, so that the airfoil members act on air flowing from the plenum inlet to direct it radially inwardly and to spread the airflow around the impeller inlet.

Abstract translation: 具有连接到叶轮入口（39）的增压室（50）的空间效率离心式鼓风机（10）。 所述增压室具有至少一个增压室入口（52），其定位成在大致垂直于叶轮轴线的方向上从叶轮的一侧提供气流。 定位在叶轮入口周围的增压室中的一组翼型件（57）具有从叶轮入口沿大致垂直于叶轮轴线的方向向外延伸的细长气流控制表面，使得翼型件作用于从增压室入口 以径向向内引导，并使气流在叶轮入口周围扩散。