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公开(公告)号：US5156524A
公开(公告)日：1992-10-20
申请号：US604747
申请日：1990-10-26
申请人： Ronald J. Forni
发明人： Ronald J. Forni
IPC分类号： F04D29/44
CPC分类号： F04D29/441 , F04D29/4226
摘要： Centrifugal blowers which maintain a substantially constant (usually .+-.5%) static pressure field around the circumference of the blower's impeller, notwithstanding at least one abrupt radial or axial discontinuity in the volute of the blower, e.g., due to one or more external axial and/or radial constraints in an irregularly shaped package. The blower accommodates such constraints by including discontinuities in the volute; therefore the blower takes advantage of relatively unconstrained segments of the package to have an overall large size. Notwithstanding the volute discontinuities, a substantially constant pressure field around the impeller is achieved by maintaining a specific relationship between G(.THETA.) and H(.THETA.), G(.THETA.) being radial extent of the volute as a function of the angular displacement .THETA. around the impeller's circumference and H(.THETA.) being the axial extent of the volute as a function of .THETA., angular displacement around the volute.
摘要翻译： 离心式鼓风机，其在鼓风机叶轮周围保持基本上恒定的（通常为+/- 5％）的静压场，尽管鼓风机蜗壳内至少有一个突然的径向或轴向不连续，例如由于一个或多个外部 在不规则形状的包装中的轴向和/或径向约束。 鼓风机容纳这样的限制，包括在蜗壳中的不连续性; 因此鼓风机利用包装的相对不受约束的部分具有整体上的大的尺寸。 尽管蜗壳不连续，但是通过保持G（THETA）和H（THETA）之间的特定关系，G（THETA）作为蜗壳的径向范围，作为围绕的角位移THETA的函数来实现叶轮周围的基本恒定的压力场 叶轮的圆周和H（THETA）是作为THETA的函数的蜗壳的轴向范围，围绕蜗壳的角位移。
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公开(公告)号：US5297931A
公开(公告)日：1994-03-29
申请号：US52811
申请日：1993-04-28
CPC分类号： F04D29/164 , F01D5/141 , F04D29/326 , F04D29/386 , Y02T50/673
摘要： An improvement to forwardly skewed axial fans whereby blade camber and rake are coordinated with skew. The blades are characterized in that a line defined by the points of maximum chordwise camber (f.sub.max) as a function of changing radial position (r) is on the leading edge side of the mid-chord line (M.sub.CL) at values of r toward the root of the blade, and is less forwardly skewed than the leading edge (LE), the mid-chord line (M.sub.CL), and the trailing edge (TE) of said blade; the blade is raked forwardly so that the trailing edge of the blade tip is axially forward of the trailing edge at the blade root; rake (k) increases monotonically as radial position r increases from 0.75R to 1.0R, R being the fan radius; the blade has a relatively large pitch ratio (P/D); and rake is corrected to reflect the chordwise position of maximum camber. As a result, the fan produces a flow that is generally in radial equilibrium having a reduced component of flow normal to the2 desired axial flow and normal to the tangential flow. The coordinated fan can be (but need not be) combined with a housing/band configuration for controlling airflow that recirculates (i.e., counter to the desired axial airflow) in a channel formed between the band and housing.
摘要翻译： 前进倾斜的轴流风扇的改进，其中叶片外倾和耙子与偏斜协调。 叶片的特征在于，作为随着径向位置（r）的变化而变化的最大和弦倾斜点（fmax）所限定的线在中弦线（MCL）的前缘侧上以r向r 并且不如前述边缘（LE），中弦线（MCL）和所述叶片的后缘（TE）向前倾斜; 叶片向前倾斜，使得叶片尖端的后缘在叶根处沿着后缘的轴向向前; 随着径向位置r从0.75R增加到1.0R，耙子（k）单调增加，R是风扇半径; 叶片具有相对较大的间距比（P / D）; 并且耙子被校正以反映最大弯度的弦向位置。 结果，风扇产生通常处于径向平衡状态的流动，其具有垂直于所需的轴向流并垂直于切向流的流动分量。 协调的风扇可以（但不必须）与壳体/带配置结合，用于控制在带和壳体之间形成的通道中再循环（即，与期望的轴向气流相反）的气流。
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公开(公告)号：US5151014A
公开(公告)日：1992-09-29
申请号：US737563
申请日：1991-07-26
CPC分类号： B64C3/58 , B64C11/22 , F01D5/14 , F04D29/324 , F04D29/384 , F04D29/681
摘要： An airfoil having a suction surface and a pressure surface, the surfaces joined together at leading and trailing portions of the airfoil, the pressure surface converging toward the suction surface at a corner, the surface converging at the corner by an angle approximately equal to or greater than at least 30.degree., such that an air stream flowing from the leading edge and over the pressure surface separates from the pressure surface at the corner. The fan therefore has a thick nose section and is substantially thinner over the majority of its chord length. One or more guide ribs extend from the pressure surface to control the flow of boundary layer air.
摘要翻译： 具有吸力表面和压力表面的翼型件，所述表面在所述翼型件的前部和后端处连接在一起，所述压力表面在拐角处朝着吸入表面会聚，所述表面在拐角处会聚约一等于或更大 比起至少30°，使得从前缘和压力表面上方流动的空气流与拐角处的压力表面分离。 因此，风扇具有较厚的鼻部，并且在其大部分弦长上基本上更薄。 一个或多个引导肋从压力表面延伸以控制边界层空气的流动。
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4.发明授权
公开(公告)号：US5423660A
公开(公告)日：1995-06-13
申请号：US79317
申请日：1993-06-17
申请人： Michael Sortor
发明人： Michael Sortor
CPC分类号： F04D29/545 , F01P5/06 , F04D29/164 , F01P11/10 , F05B2250/231 , F05B2250/71
摘要： An improved plastic, injection-molded shroud/banded fan combination in which the shroud extends axially from an inlet portion to an outlet portion, and the outlet portion comprises means for connecting a heat exchanger to the shroud, More specifically, the shroud includes an inlet lip which is curved in cross-section and positioned at the inlet portion of the shroud. The lip extends radially inward and axially downstream from the inlet portion of the shroud to a trailing edge. An intermediate cylindrical wall is attached to said inlet lip. The intermediate cylindrical wall is positioned: 1) coaxially with the fan; and 2) radially between the inner surface of the shroud and portions of the outer surface of the fan band so as to form a wall-to-band radially restrictive running clearance.
摘要翻译： 一种改进的塑料注射成型护罩/带状风扇组合，其中护罩从入口部分轴向延伸到出口部分，并且出口部分包括用于将热交换器连接到护罩的装置。更具体地，护罩包括入口 唇缘，其在横截面上弯曲并且定位在护罩的入口部分。 唇缘从护罩的入口部分的径向向内和轴向延伸到后缘。 中间圆柱形壁连接到所述入口唇缘。 中间圆柱壁位于：1）与风扇同轴; 和2）径向地在护罩的内表面和风扇带的外表面的部分之间，以形成壁对带径向限制的运行间隙。
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公开(公告)号：US5000660A
公开(公告)日：1991-03-19
申请号：US392769
申请日：1989-08-11
申请人： Robert J. Van Houten , David Daiute
发明人： Robert J. Van Houten , David Daiute
CPC分类号： F04D29/328 , F04D29/386 , F04D29/666
摘要： An axial flow fan comprising: a cental hub rotatable on an axis; and a plurality of blades extending from the hub, each of the blades comprising a root portion adjacent to the hub, and terminating in a tip portion, the root portions of the blades being approximately evenly spaced around the hub; wherein each of the blades exhibits a curvature from the root portion of the blade to the blade's tip portion, the curvature being in a plane that is perpendicular to the axis on which the fan rotates; and wherein the curvature differs between at least two of the blades, such that the distance between the tip portions of at least wo sets of adjacent blades is unequal. The invention therefore achieves the advantage of having uneven blade spacing near the tips while maintaining high solidity near the hub, where the blade spacing is even. Uneven blade spacing near the tips reduces noise. Having high solidity near the hub, where non-dimensional loading is highest, maintains higher dynamic performance.
摘要翻译： 一种轴流风扇，包括：可沿轴线旋转的中心轮毂; 以及从所述轮毂延伸的多个叶片，每个所述叶片包括与所述轮毂相邻的根部，并且终止于尖端部分，所述叶片的根部围绕所述轮毂大致均匀间隔; 其中每个所述叶片呈现出从所述叶片的根部到所述叶片的尖端部分的曲率，所述曲率在与所述风扇旋转的轴线垂直的平面中; 并且其中所述曲率在至少两个叶片之间不同，使得至少相邻叶片组的尖端部分之间的距离不相等。 因此，本发明实现了在尖端附近具有不均匀的叶片间隔的优点，同时在毂附近保持高的固体度，其中叶片间隔是均匀的。 尖端附近的叶片间距不均匀会降低噪音。 在集线器附近具有高度坚固性，其中无尺寸加载最高，保持更高的动态性能。
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公开(公告)号：US5342167A
公开(公告)日：1994-08-30
申请号：US959250
申请日：1992-10-09
申请人： Todd D. Rosseau
发明人： Todd D. Rosseau
IPC分类号： F04D29/66
CPC分类号： F04D29/666 , F04D29/544
摘要： An axial flow fan includes blades mounted on a hub and extending radially outward to a shroud disposed around the hub. Pairs of stators are connected to the shroud at positions angularly spaced about the inner periphery of the shroud. Each pair of stators includes a trailing stator angularly spaced from a leading stator by a distance related to the number of blades of the cooling fan. A trailing stator of one pair is spaced from a leading stator of an adjacent pair by a distance different than the distance between leading and trailing stators of each pair.
摘要翻译： 轴流风扇包括安装在轮毂上并且径向向外延伸到设置在轮毂周围的护罩的叶片。 成对的定子在围绕护罩的内周角度间隔开的位置处连接到护罩。 每对定子包括一个与前导定子成角度地间隔开与冷却风扇叶片数相关的距离的后定子。 一对的尾部定子与相邻对的前导定子间隔一段距离，每一个距离不同于每对的前后定子之间的距离。
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公开(公告)号：US5064345A
公开(公告)日：1991-11-12
申请号：US438774
申请日：1989-11-16
申请人： Richard Kimball
发明人： Richard Kimball
CPC分类号： F04D29/386 , F04D29/326 , F05D2240/307 , Y10S416/05
摘要： A blade for a fan or blower which has an abrupt transition region between an inner blade region which has a negative leading edge sweep angle, and an outer blade region which is highly forwardly swept. The outer blade region is further characterized by a blade chord that increases with increasing radius. The fan provides a low pitch width and superior noise and efficiency trade-offs.
摘要翻译： 一种用于风扇或鼓风机的叶片，其在具有负前缘扫掠角的内叶片区域和高度向前扫掠的外叶片区域之间具有突然的过渡区域。 外刀片区域的特征还在于刀片弦随着半径的增加而增加。 风扇提供了低音调宽度和优异的噪声和效率权衡。
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公开(公告)号：US4971520A
公开(公告)日：1990-11-20
申请号：US392347
申请日：1989-08-11
申请人： Robert J. Van Houten
发明人： Robert J. Van Houten
IPC分类号： F04D29/38
CPC分类号： F04D29/386 , F04D29/326 , F04D29/388 , F05D2240/304 , Y10S416/05
摘要： The invention features an axial fan for passing air through a heat exchanger, the fan comprising a hub rotatable on an axis and a plurality of blades, each of which extend radially outward from a root portion attached to the hub to a tip portion, the blades characterized by a trailing edge angle that varies by approximately 40.degree. or more over the radial extent of each blade. The blade trailing edge angle is preferably greater than 60.degree. at the root region.
摘要翻译： 本发明的特征在于一种用于使空气通过热交换器的轴流式风扇，该风扇包括一可轴向旋转的毂和多个叶片，每个叶片从附接到轮毂的根部径向向外延伸到顶端部分，叶片 其特征在于在每个叶片的径向范围内变化大约40度或更大的后缘角度。 在根部区域，叶片后缘角优选大于60°。
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公开(公告)号：US4917572A
公开(公告)日：1990-04-17
申请号：US197226
申请日：1988-05-23
申请人： Robert Van Houten
发明人： Robert Van Houten
CPC分类号： F04D29/4226 , F04D17/16
摘要： A centrifugal blower with rearwardly curved impeller blades positioned in a housing between two housing faces that are spaced apart along the impeller axis. One of the housing faces defines a housing inlet. The housing is substantially closed off with the exception of the inlet and an outlet. The blower is generally characterized in that the: (a) clearance between the impeller blades and at least one of the housing faces is greater than 30% of the impeller blade depth; (b) the impeller diameter is at least 70% of the housing dimension along that diameter; and (c) area of the blower outlet is greater than 70% of the area of a section of the housing taken perpendicular to the direction of airflow along the impeller axis.
摘要翻译： 离心鼓风机，其具有向后弯曲的叶轮叶片，其定位在沿着叶轮轴线间隔开的两个壳体表面之间的壳体中。 一个壳体面限定了壳体入口。 除了入口和出口之外，外壳基本封闭。 鼓风机的特征在于：（a）叶轮叶片与至少一个壳体面之间的间隙大于叶轮叶片深度的30％; （b）叶轮直径为沿该直径的壳体尺寸的至少70％; 和（c）鼓风机出口的面积大于垂直于沿着叶轮轴线的气流方向截取的壳体的一部分面积的70％。
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公开(公告)号：US4900228A
公开(公告)日：1990-02-13
申请号：US310664
申请日：1989-02-14
申请人： Martin G. Yapp
发明人： Martin G. Yapp
CPC分类号： F04D29/681 , F04D29/282 , F04D29/30
摘要： Boundary layer separation in a rearwardly skewed centrifugal impeller can be better controlled by designing the impeller blades with an "S" camber, i.e., with rearward curved radially extending blades in a centrifugal blower. The blades have a positive camber at a radially inward region and a negative camber at a radially outward region of the blade.
摘要翻译： 通过设计具有“S”倾角的叶轮叶片，即在离心式鼓风机中具有向后弯曲的径向延伸的叶片，可以更好地控制向后倾斜的离心式叶轮中的边界层分离。 叶片在径向向内的区域具有正外倾角，在叶片的径向向外的区域具有负的外倾角。
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