Abstract:
A centrifugal blower assembly includes a housing having an inner surface and an outer surface. The inner surface of the housing defines in part an interior space. The centrifugal blower also includes a first portion of texture applied to at least a first portion of at least one of the inner surface and the outer surface of the housing. The first portion of texture has a first height based at least in part on a local boundary layer height of an airflow moving across at least one of the inner surface and the outer surface respectively. The first portion of texture is configured to generate a turbulent flow within the airflow moving across the first portion of texture.
Abstract:
In one aspect, a flexible fan blade for use in a centrifugal fan impeller having at least one of a rear plate and a front plate with an air inlet is provided. The flexible fan blade comprises a fixed central portion fixedly coupled to at least one of the front plate and the rear plate of the centrifugal fan impeller. The flexible fan blade also includes a trailing edge extending from the fixed central portion and being moveable between a first position and a second position. The trailing edge is fabricated from a compliant material. Furthermore, the trailing edge is flexible in relation to the fixed central portion between a first position and a second position. The flexible fan blade also includes a leading edge extending from the fixed central portion in opposed relation to the trailing edge.
Abstract:
A centrifugal blower assembly includes a scroll wall and at least one sidewall. The scroll wall is coupled to the at least one sidewall such that the scroll wall and the at least one sidewall at least partially define a blower chamber. The centrifugal blower assembly also includes an air stream splitter coupled to the scroll wall. The air stream splitter includes a base member fixedly coupled to the scroll wall and positioned within the blower chamber and a spline member extending a varying distance from the scroll wall and perpendicularly from the base member. An outer surface of the airstream splitter contacts an inner surface of the scroll wall.
Abstract:
In one aspect, a centrifugal blower assembly is provided. The centrifugal blower assembly includes a housing defining an interior space and an impeller configured to channel an airflow within the interior space. A motor is coupled to the impeller and configured to rotate the impeller about an axis. The centrifugal blower also includes a plurality of mounting arms. Each mounting arm of the plurality of mounting arms includes a first end coupled to the housing and a second end coupled to the motor. Each mounting arm of the plurality of mounting arms has a cross-sectional profile that comprises a portion of an airfoil shape.
Abstract:
A centrifugal blower assembly includes a housing having an inner surface and an outer surface. The inner surface of the housing defines in part an interior space. The centrifugal blower also includes a first portion of texture applied to at least a first portion of at least one of the inner surface and the outer surface of the housing. The first portion of texture has a first height based at least in part on a local boundary layer height of an airflow moving across at least one of the inner surface and the outer surface respectively. The first portion of texture is configured to generate a turbulent flow within the airflow moving across the first portion of texture.
Abstract:
A centrifugal fan is described. The fan uses a blade that is tapered across the span of the blade. The taper can be larger towards the end opposite of the inlet or larger at the inlet. The blade may be backwardly inclined and/or curved. The fan may also include a turning vane.
Abstract:
A housing for coupling to a motor having an axis of rotation is provided. The housing includes an end cap having an outer surface and an inner surface. The housing also includes a plurality of first heat fins coupled to the outer surface. Each first heat fin of the plurality of first heat fins includes a first portion extending radially from the axis of rotation. In addition, the housing includes a second portion coupled to first portion and extending parallel to the axis of rotation. The housing further includes a second heat fin coupled to the second portion.
Abstract:
In one aspect, a motor assembly is provided. The motor assembly includes a fan housing having an air inlet and an air outlet, and a motor coupled to the fan housing and positioned within the air inlet. The motor includes a first end, a second end, and a shaft. The motor assembly further includes a fan coupled to the shaft proximate the motor second end. The motor first end includes a contoured surface having a stagnation point and a plurality of points along the contoured surface downstream of the stagnation point. Each point of the plurality of points has a coefficient of pressure less than 1, and the contoured surface is configured to direct air around the motor and to reduce airflow restriction and flow disturbance within the fan housing
Abstract:
An electric motor for use with a power supply includes a housing and a stator fixedly secured to the housing. The stator has a plurality of coils secured to the stator. The motor also includes a first rotor secured to the stator and having a first number of poles and a second rotor secured to the stator and having a second number of poles. The second number being different than the first number. The plurality of coils cooperates with the first rotor to rotate the first rotor at a first rotor rotational speed and the plurality of coils cooperates with the second rotor to rotate the second rotor at a second rotor rotational speed. The second rotor rotational speed is substantially different than the first rotor rotational speed.
Abstract:
A housing for coupling to a motor having an axis of rotation is provided. The housing includes an end cap having an outer surface and an inner surface. The housing also includes a plurality of first heat fins coupled to the outer surface. Each first heat fin of the plurality of first heat fins includes a first portion extending radially from the axis of rotation. In addition, the housing includes a second portion coupled to first portion and extending parallel to the axis of rotation. The housing further includes a second heat fin coupled to the second portion.