摘要:
A fan blade comprising a body (10) having a tip end (20) and an in-board end (18) is configured with first (26) and second (28) fin portions that extend along the trailing edge (16) of the body (10) of the van blade. The first fin portion (26) extends from the in-board end (18) of the fan blade along the trailing edge (16) toward the tip end (20), while the second fin portion (28) extends from the tip end (20) of the van blade along the trailing edge (16) toward the in-board end (18). Both the first (26) and second (28) fin portions extend outwardly from the trailing edge (16) of the body at an angle to the trailing edge (16). A slot (30) or gap exists between the first (26) and second (28) fin portions and each such fin portion has a tapered width which narrows in the direction of the tip end (20). The width of the first fin portion (26) is greater than the width of the second fin portion (28) and the two fin portions may or may not be co-planar in order to optimize air flow.
摘要:
A secondary separator (50) in an arrangement for separating a gas and liquid mixture is supported with a primary separator (30) of the arrangement, by liquid drain tubes (66) from the secondary separator. The arrangement has a vessel with an inlet for entry of the gas and liquid mixture and an outlet for exit of a separated gas, at least one primary centrifugal separator (30) in the vessel for centrifugally separating the gas from the mixture; and at least one secondary centrifugal separator (50) in the vessel for further centrifugally separating the gas from the mixture. The secondary separator has a liquid collection enclosure (60) with an upper end and a lower end. An outlet plate (64) extends across the lower end for closing the lower end of the enclosure. The outlet plate (64) has a plurality of drain openings there-through and a plurality of drain tubes (66) are spaces around the enclosure, each drain tube being connected to one of the drain openings for draining liquid from to the enclosure. The drain tubes are connected to the enclosure for supporting the secondary separator in the arrangement.
摘要:
In the moulding of a hollow fan blade a fibreglass preform (18), which may be supported by an inflatable bag (26), is used to support upper layers of fibreglass cloth (24) within a mould (22). As resin is injected into the mould (22), both the fibreglass cloth (24) and the fibreglass preform (18) become impregnated thereby bonding the two together into a single unit during the moulding operation during which heat and pressure is applied.
摘要:
There are disclosed a blade for use as part of an axial flow fan and a method of forming such a blade wherein a large concentration of silica particles are molded into the leading edge of a hollow, one-piece molded body which includes a core of reinforced, thermosetting resin having relatively low abrasion resistance.
摘要:
There are disclosed a blade for use as part of an axial flow fan and a method of forming such a blade wherein a large concentration of silica particles are molded into the leading edge of a hollow, one-piece molded body which includes a core of reinforced, thermosetting resin having relatively low abrasion resistance.