摘要:
A process of producing a ring cooling fan, the ring cooling fan including at least two fan blades, a fan hub, and a fan ring. Each of the fan blades has a distal end disposed away from the fan hub and connected with one another via the fan ring and a proximal end disposed on the fan hub. At least one of the fan blades includes at least two stiffening ribs in an open-box structure. The process includes disposing the fan hub in a mold, molding the at least two fan blades and the fan ring such that the stiffening ribs are disposed on a top surface of the fan blade and are fully connected with each other on at most two sides, and removing the ring cooling fan from the mold.
摘要:
A hub for securing a shaft that provides three or more points of contact with a motor shaft. The hub of the present invention comprises a body having at least one bore into which the shaft is inserted and a groove in the wall defining the bore positioned generally opposite a set screw hole to provide at least two points of contact with the shaft, thereby providing at least three points of contact to secure the shaft inside the bore: one point of contact between the set screw and the shaft and the other two points of contact between the shaft and the body on either side of the groove. The present invention also includes various impellers using the hub of the present invention, such as a nullsquirrel cagenull impeller with the hub of the present invention, and other classic hub applications with the hub of the present invention, such as a gear plate or a pulley using the hub of the present invention.
摘要:
The efficiency of a fan clutch is improved by having a central finned cover attached to the fan clutch at its rotational axis with fins or blades thereon to disperse air radially outwardly from a dead air bubble at the rotational axis of the fan. This is achieved by a cover having a disk-shaped body with fan fins extending from the rotational axis outwardly to the rim of the disk-shaped body to move air from the rotational axis to prevent the build-up of a negative pressure at the rotational axis and this air flow from the rotational axis into the clutch fan blades appreciably increases the total air flow by the fan clutch. The preferred fins are curved between their inner ends at the rotational axis and their outer ends which extend to the fan blades of the fan clutch. The fins may wrap around the rim of the disk-shaped body and the latter may have a curved outer, front surface.
摘要:
A method and apparatus are used to balance an open blade fan of the kind used with trucks, diesel engine driven generator sets, and the like. An apparatus is used to spin the fans and a vibration sensor senses vibrations and a light beam is used to indicate the location to attach a balancing weight. The fan is spun again and the vibrations measured and additional weights are attached at different specified locations until the measured vibrations are below a predetermined level. The fan includes a plastic body with integral, plastic fan blades which is attached to a central metal hub plate with configured weights attached to matching configured portions of the plastic body. The preferred weights are clips with barbs that pierce the plastic body. The metal hub plates are electrostatically painted to provide a uniformly thick coating with good adhesion. An ultraviolet light additive is provided in the plastic body with the fan blades being reinforced with glass particles and rendered UV resistant by the UV additive.
摘要:
A cooling fan assembly (10) includes a hubless polymer fan body molded around the perimetrical flange (20) of a metallic mounting hub (12). The fan body includes a circumferential ring (18) interlocked with the flange (20) and a plurality of fan blades (16) projecting outwardly from the ring (18). The fan body (14) is formed in an injection mold with molten polymer material being introduced into the mold at hot runner locations (25) disposed between the circumferential ring (18) and the root diameter (17) of the fan blades (16). At one face of the hubless fan (14), the circumferential ring (18) includes a plurality of uniformly spaced raised bosses (30). Each boss (30) defines a bore (31) configured to receive a balancing weight therein, preferably in the form of a balancing screw (35) threaded into the bore. The bosses (30) are interconnected by a stiffening ring (33) having a height substantially equal to the height (h) of the bosses (30). The stiffening ring (33) is modified between a plurality of pairs of bosses (30) to define a recessed flat (38). On the opposite face of the hubless fan (14), the circumferential ring (18) includes a plurality of raised tabs (40), arranged and configured to mate within a corresponding recessed flat (38). The corresponding recessed flats (38) and raised tabs (40) nest between stacked fan assemblies (10) to enhance the stability and increase the number and height of stacked sets of assemblies.
摘要:
A fan drive assembly including a cooling fan (11) and a fluid coupling device (13). The cooling fan includes a fan hub (17), a spider (15), and a plurality of fan blades (19). The coupling device has an output coupling assembly (21) including a body (23) and a cover (25). The body (23) includes preferably only three mounting portions (67), each being disposed immediately adjacent an outer periphery of the body. Each of the mounting portions (67) defines the necessary machining chucking surfaces (73), and a spider mounting surface (75) including a pilot surface (77) engaging the pilot diameter (79) of the spider (15). The body (23) includes cooling fins (61) covering substantially all of the rearward surface (59) of the body not covered by the mounting portions. The fan hub (17) also includes a rearwardly extending air dam portion (81), limiting localized radial air flow. The present invention is able to improve the radial air flow through the body cooling fins and achieve substantially greater heat dissipation from the fan drive assembly, thus permitting greater fan speed for a given input speed.
摘要:
An axial-flow fan comprises a hub having an axial dimension T.sub.N, and including a planar portion extending in a radial direction. Axial blades connected to the hub, and each axial blade has an axial dimension T.sub.Sch in a vicinity of a radially outermost portion of the hub. The axial dimension T.sub.Sch of each axial blade is greater than the axial dimension T.sub.N of the hub. Each axial blade has a projection U beyond the planar portion of the hub. The projection U extends axially from a leading edge of each axial blade to the planar portion of the hub.
摘要翻译:轴流风扇包括具有轴向尺寸TN的毂,并且包括沿径向方向延伸的平面部分。 连接到轮毂的轴向叶片,并且每个轴向叶片在轮毂的径向最外部分附近具有轴向尺寸TSch。 每个轴向叶片的轴向尺寸TSch大于轮毂的轴向尺寸TN。 每个轴向叶片在毂的平面部分之外具有超过+ E,uml U + EE的突起。 投影+ E,uml U + EE从每个轴向叶片的前缘轴向延伸到轮毂的平面部分。
摘要:
A cooling fan assembly (13) is attached to a motor (11) by a mating, "twist-lock" adaptor plate (30) having radial lugs (33), which engage a shouldered recess (23) in a corresponding hub (22A).
摘要:
A fan has a hub and a plurality of blades each having a medial line, a root region secured to the hub and extending radially outwardly to a tip region, with a leading edge and a trailing edge of each blade having a respective surface portion which is tangential to a respective radius of the fan, the leading edge and the trailing edge of each blade at the tip region being circumferentially behind, with respect to a first direction of rotation, the leading edge and trailing edge at the root region whereby the fan is rearwardly skewed wherein each blade has a dihedral angle formed between a plane perpendicular to a center axis of the fan and a line tangent to the medial line, each blade having a surface which is curved so that the dihedral angle decreases along the span of the blade moving from the root to the tip over a portion of the span equal to about 50% of the total span and wherein the dihedral angle increases over the remaining portion of the span.
摘要:
A fan (31) and fan drive (11) assembly in which the fan includes a spider (33), typically a metal stamping, defining fastener openings (41), each including larger opening (43) and a smaller opening (45). Adjacent the smaller opening, the spider defines a raised ramp portion (47). The fan drive includes an output (13) defining fan mounting portions (21), each of which includes a head portion (25), and a shank portion (27). Upon assembly, the head portions (25) align with, then pass axially through the larger openings (43), then the fan is rotated relative to the fan drive, resulting in the shank portions (27) moving into the smaller openings (45) and the head portions (25) passing over and deforming the ramp portions (47), thus tightly engaging the fan spider (33) to the fan drive output member (13). The invention provides an assembly and method which eliminate the need for bolts, and the associated drilling and tapping of threaded holes in the output member, as well as the time-consuming bolting process in the assembly plant, and the periodic bolt strippage and associated warranty problems.