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公开(公告)号：US4546631A
公开(公告)日：1985-10-15
申请号：US701440
申请日：1985-02-12
摘要： A roller mechanism and method for forming helical shaped structures from a feed wire or rod, wherein the feed wire is drawn through a plurality of staggered forming rollers by rotation of the rollers, while the wire is also being rotated about its own axis so as to form the desired helical shaped product. The mechanism includes a support frame and at least four lower fixed position driven rollers and at least five upper idler rollers having adjustable positions relative to the lower rollers rotatably mounted in the frame. The lower rollers usually have a roughened or grooved surface to facilitate drawing the feed wire through the staggered forming rollers. If desired, the feed wire can be pulled off a rotating supply reel by a pair of guiding rollers and then passed through the forming rollers to provide the desired helical shaped product.
摘要翻译： 一种用于从进给丝或棒形成螺旋形结构的辊机构和方法，其中，通过辊的旋转，进给丝线通过多个交错成形辊被拉出，同时线也绕其自身的轴线旋转，以便 形成所需的螺旋形产品。 该机构包括支撑框架和至少四个下固定位置从动辊和至少五个上部惰轮，其具有相对于可旋转地安装在框架中的下辊的可调节位置。 下辊通常具有粗糙或凹槽的表面，以便于将进给丝线穿过交错成形辊。 如果需要，可以通过一对引导辊将馈线拉出旋转的供给卷轴，然后通过成形辊提供所需的螺旋形产品。
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2.发明授权
公开(公告)号：US5667149A
公开(公告)日：1997-09-16
申请号：US497847
申请日：1995-07-03
CPC分类号： B02C15/001 , B02C23/32 , B02C2015/002
摘要： A solids pulverizing mill for producing fine particles such as coal dust, which includes a housing having a centrally located coal feed chute and enclosing an annular-shaped air port ring containing multiple nozzles located around a rotatable grinding table. Multiple grinding rollers press down and rotate upon the coal on the rotatable grinding table so as to pulverize the coal, which is then entrained by multiple intersecting and strongly interacting air jet streams upwardly from the grinding table through a classifier section to an exit conduit. The air port nozzle ring is fitted with multiple angled flow passages from which adjacent air jet streams intersect and interact strongly with the adjacent streams to product intense turbulence, which prevents undesirable acoustic vibration of the upflowing air/coal material within the mill housing. The centerlines of adjacent air jet nozzles intersect at an included angle of at least 20.degree. and not exceeding 90.degree., each nozzle has cross-sectional area of 10-50 in..sup.2, and provides nozzle exit air flow velocities of 140-250 ft/sec so as to prevent undesired acoustic resonance vibrations within the pulverizer mill.
摘要翻译： 一种用于生产煤灰等细颗粒的固体粉碎机，其包括具有位于中心的煤进料槽的壳体，并且包围围绕可旋转研磨台的多个喷嘴的环形空气口环。 多个研磨辊压下并在可旋转的研磨台上的煤上旋转，以便粉碎煤，然后将煤通过分级器部分到出口导管从研磨台向上被多个相交和强烈相互作用的空气喷射流夹带。 空气口喷嘴环配有多个成角度的流动通道，相邻的空气喷射流从该流道相交并与邻近的流强烈地相互作用，以产生强烈的湍流，这防止了上升流动的空气/煤材料在磨机壳体内的不期望的声音振动。 相邻喷气喷嘴的中心线以至少20度和不超过90度的夹角相交，每个喷嘴的横截面积为10-50英寸2，并提供140-250英尺的喷嘴出口空气流速 /秒，以防止粉碎机内不希望的声共鸣振动。
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公开(公告)号：US5349813A
公开(公告)日：1994-09-27
申请号：US973022
申请日：1992-11-09
CPC分类号： F01D25/04 , F01D25/30 , F01K23/10 , F02G1/043 , F23M20/005 , F02G2243/54 , F23R2900/00014 , Y02E20/16
摘要： A system and method for resisting thermoacoustic oscillations in systems comprised of hot and cold components is disclosed. More particularly, a combined cycle power generation system 32 having a gas turbine 40, a gas turbine discharge duct 34, and a gas turbine recuperator 36 and 38 is disclosed. The system 32 is designed to resist severe thermoacoustic oscillations over its entire load range by providing for an asymmetrical arrangement of the hot section L-l, including the gas discharge duct 34 and the plenum 36 of the recuperator, and the cold section l, including the heat exchange tubes 38 of the recuperator. Also disclosed is a steam generation system 42 having a plenum 46, a burner 48, and a furnace 44. The steam generation system 42 is also designed to resist severe thermoacoustic oscillations by providing for an appropriate burner length L and by providing for an asymmetrical arrangement of a hot burner section L-l and a cold burner section l within the burner 48. Alternative means are also disclosed for avoiding severe thermoacoustic oscillations in the combined cycle generation system and in the steam generation system by disrupting or avoiding the modified Sondhauss effect in those systems.
摘要翻译： 公开了一种用于抵抗由热和冷组件组成的系统中的热声振荡的系统和方法。 更具体地，公开了具有燃气轮机40，燃气轮机排放管道34和燃气轮机换热器36和38的联合循环发电系统32。 系统32被设计成通过提供热段L1的不对称布置来抵抗其整个载荷范围内的严重的热声振动，包括气体排放管道34和换热器的增压室36以及包括热量的冷部分 换热器的换热管38。 还公开了具有集气室46，燃烧器48和炉44的蒸汽发生系统42.蒸汽发生系统42还被设计成通过提供适当的燃烧器长度L并通过提供不对称布置来抵抗严重的热声振动 热燃烧器部分L1和冷燃烧器部分l在燃烧器48内。还公开了替代方法，用于通过中断或避免在这些系统中改进的Sondhauss效应来避免组合循环发生系统和蒸汽发生系统中的严重热声振荡 。
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公开(公告)号：US4796690A
公开(公告)日：1989-01-10
申请号：US36821
申请日：1987-04-08
CPC分类号： F22B37/202 , F28F9/013
摘要： A heat exchange apparatus in which a plurality of heat exchange tubes are disposed in a enclosure and are supported relative to two opposed upright walls of the enclosure. Each tube is formed in a serpentine manner with adjacent tube sections extending in a vertically spaced parallel relationship between the upright walls. Adjacent tube sections are connected at a distance from each of the walls of between one-fourth and one-third the distance between the two walls.
摘要翻译： 一种热交换装置，其中多个热交换管设置在外壳中并且相对于外壳的两个相对的直立壁被支撑。 每个管以蛇形方式形成，相邻的管部分以直立壁之间的垂直间隔开的平行关系延伸。 相邻的管部分在距离两个壁之间的距离的四分之一至三分之一的每个壁之间连接一段距离。
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公开(公告)号：US4204570A
公开(公告)日：1980-05-27
申请号：US880399
申请日：1978-02-23
CPC分类号： F28D7/06 , F28F9/0132 , F28F9/22
摘要： A tube spacer is provided for use in a tube bundle including a plurality of spaced apart rows of tube sections. The spacer comprises an elongated member having a contour defining a helix, is adapted to extend through the spaces defined between adjacent tube sections of the rows of tube sections and to contact the outside surfaces of the tube sections, and is adapted to be removed from the tube bundle in the direction in which it extends into the tube bundle.
摘要翻译： 管间隔件设置用于管束，包括多个间隔开的管段。 间隔件包括具有限定螺旋线的轮廓的细长构件，其适于延伸穿过管段的相邻管段之间限定的空间并且接触管部分的外表面，并且适于从 管束沿其延伸到管束的方向。
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6.发明授权Piping systems providing minimal acoustically-induced structural vibrations and fatigue 失效管道系统提供最小的声学诱导的结构振动和疲劳
公开(公告)号：US5711350A
公开(公告)日：1998-01-27
申请号：US690043
申请日：1996-07-31
CPC分类号： F15D1/02
摘要： Piping systems adapted for handling fluids such as steam and various process and hydrocarbon gases through a pressure-reducing device at high pressure and velocity conditions can produce severe acoustic vibration and metal fatigue in the system. It has been determined that such vibrations and fatigue are minimized by relating the acoustic power level (PWL) generated in the piping system to being a function of the ratio of downstream pipe inside diameter D.sub.2 to its wall thickness t.sub.2. Additionally, such vibration and metal fatigue can be further minimized by relating the fluid pressure drop .DELTA.p and downstream Mach number M.sub.2 to being a function of the ratio of downstream piping inside diameter D.sub.2 to the pipe wall thickness t.sub.2, as expressed by M.sub.2 .DELTA.p=f (D.sub.2 /t.sub.2). Pressure-reducing piping systems designed according to these criteria exhibit minimal vibrations and metal fatigue failures and have long operating life.
摘要翻译： 适用于在高压和速度条件下通过减压装置处理诸如蒸汽和各种工艺和烃气体的流体的管道系统可能在系统中产生严重的声振动和金属疲劳。 已经确定通过将管道系统中产生的声功率水平（PWL）与下游管内径D2的比值与其壁厚度t2之间的关系来将这种振动和疲劳最小化。 另外，通过将流体压降DELTA p和下游马赫数M2与下游管道内径D2与管壁厚度t2的比值相关联，可以进一步减小这种振动和金属疲劳，如M2 DELTA p = f（D2 / t2）。 根据这些标准设计的减压管道系统显示出最小的振动和金属疲劳故障，并具有较长的使用寿命。
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7.发明授权
公开(公告)号：US5340275A
公开(公告)日：1994-08-23
申请号：US100787
申请日：1993-08-02
CPC分类号： F04D29/665
摘要： A rotary cutoff device for reducing noise generated by the impeller blading of rotating centrifugal fans. The rotary device includes a casing partially enclosing a rotor mounted near the centrifugal fan discharge opening. The rotor containing a plurality of resonator cavities consisting either of quarter wave length resonators or of Helmholtz type resonators, each cavity being oriented preferably transverse to the rotor axis and having a length/diameter ratio in the range of 8/1-16/1. The rotor can be rotatably adjustable relative to the fan impeller, or it can be driven by a motor at a surface speed 30-100% that of the fan impeller surface speed, so that the rotor resonator cavities act as either quarter wave length or Helmholtz resonators to absorb effectively the acoustic pulsations generated by the centrifugal fan blade pass frequency of the fan and its harmonics, and reduce substantially the noise generated by centrifugal fans.
摘要翻译： 一种旋转切断装置，用于减少旋转离心风扇的叶轮叶片产生的噪音。 旋转装置包括部分地包围安装在离心风扇排出口附近的转子的壳体。 转子包含由四分之一波长谐振器或亥姆霍兹型谐振器组成的多个谐振腔，每个空腔优选地横向于转子轴线定向，并具有在8 / 1-16 / 1范围内的长度/直径比。 转子可以相对于风扇叶轮可旋转地调节，或者可以由电机以与风扇叶轮表面速度的30-100％的表面速度驱动，使得转子谐振腔可以作为四分之一波长或亥姆霍兹 谐振器可有效吸收风扇离心风扇叶片通过频率及其谐波产生的声波脉动，大大降低离心风机产生的噪音。
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公开(公告)号：US4981169A
公开(公告)日：1991-01-01
申请号：US465828
申请日：1990-01-12
CPC分类号： F28F9/013
摘要： A corrugated-shaped acoustic baffle unit for insertion into a tube bundle of a tubular-type heat exchanger having parallel staggered tubes to prevent flow-induced vibrations in the heat exchanger. The baffle unit is formed of at least two helical-shaped spacer members each rotatably attached to a flexible connecting barrier member, such as a fabric or metal mesh material or formed by multiple adjacent bars or tubes each attached to the rotatable spacer members. The flexible corrugated-shaped baffle unit can be inserted between adjacent parallel tubes of a heat exchanger by rotating simultaneously the helical-shaped spacer members. After insertion of the baffle unit, the ends of the helical-shaped spacer members are connected together so as to prevent their further rotation and thereby secure the baffle unit firmly in place between adjacent tubes of the heat exchanger.
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公开(公告)号：US4286549A
公开(公告)日：1981-09-01
申请号：US99677
申请日：1979-12-03
IPC分类号： F22B37/24
CPC分类号： F22B37/244
摘要： An apparatus and method are provided for top-supporting a steam generator from a frame which is connected to a base. A plurality of dampers are connected between upstanding frame members and the steam generator, acting to absorb a portion of the energy resulting from dynamic loads imparted between the frame and the steam generator.
摘要翻译： 提供一种用于从连接到基座的框架顶部支撑蒸汽发生器的装置和方法。 多个阻尼器连接在直立框架构件和蒸汽发生器之间，用于吸收由框架和蒸汽发生器之间施加的动态载荷产生的能量的一部分。
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10.发明授权
公开(公告)号：US4226279A
公开(公告)日：1980-10-07
申请号：US933706
申请日：1978-08-15
CPC分类号： F28F19/00 , F22B37/102 , F22B37/40 , Y10S165/91
摘要： A method of suppressing formation of heat exchange fluid particles into standing waves is provided. Pursuant to the method a plurality of metal fins attached to a plurality of tube sections extending within a shell are disposed within a heat exchanger shell such that the fins extend parallel to the tube sections and parallel to the direction of flow of fluid through the shell. The fins define with the tube sections a barrier adapted to interrupt movement of columns of fluid particles in a direction perpendicular to the direction of flow of fluid through the shell.
摘要翻译： 提供了抑制热交换流体颗粒形成驻波的方法。 根据该方法，附接到在壳体内延伸的多个管部分的多个金属翅片设置在热交换器壳体内，使得翅片平行于管部延伸并且平行于通过壳体的流体的流动方向延伸。 翅片限定了管部分，其适于阻止流体颗粒柱在垂直于通过壳体的流体的流动方向的方向上的运动。
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