Low cost, high density C-C composites densified by CVD/CVI for aircraft friction materials
    2.
    发明授权
    Low cost, high density C-C composites densified by CVD/CVI for aircraft friction materials 有权
    低成本,高密度的C-C复合材料通过CVD / CVI对飞机摩擦材料致密化

    公开(公告)号:US09017761B2

    公开(公告)日:2015-04-28

    申请号:US12469384

    申请日:2009-05-20

    摘要: Carbon-carbon composites made by needling together woven or nonwoven fabric made from carbon-containing fibers followed by carbonizing the fabric preforms are described. The carbon fiber preforms can be needled either in a carbonized or in an uncarbonized state. The uncarbonized fiber preforms would go through a carbonization/heat-treat step following the needling process. Final preform thickness and fiber volume is also controlled at carbonization, for instance by varying the level of pressure applied to the preforms during carbonization. For example, the preforms may be unconstrained during carbonization (i.e., no pressure is applied to them) or the preforms may be constrained during carbonization, typically by means for applying pressure (e.g., weight placed on top of the preforms). The preforms are then infiltrated via CVD/CVI processing in order to increase their density, resulting in a carbon-carbon composite which is suitable for use as, for instance, a brake disc or pad in aircraft and automotive brake systems.

    摘要翻译: 描述了通过将由含碳纤维制成的织造或无纺织物针织在一起而将织物预成型件碳化之后制成的碳 - 碳复合材料。 碳纤维预制件可以以碳化或未碳化的状态进行针刺。 未经碳化的纤维预制件将经过针刺过程之后的碳化/热处理步骤。 最终的预成型件厚度和纤维体积也可以通过碳化来控制,例如通过改变在碳化过程中施加到预制件上的压力水平。 例如,预制件在碳化期间可能是不约束的(即,没有压力施加到它们),或者预制件在碳化期间可能被约束,通常通过施加压力的方式(例如,放置在预成型件顶部的重量)。 然后通过CVD / CVI处理渗透预成型件,以增加它们的密度,产生适合用作飞机和汽车制动系统中的制动盘或垫的碳 - 碳复合材料。

    APPARATUS FOR CARBON FIBER PROCESSING AND PITCH DENSIFICATION
    3.
    发明申请
    APPARATUS FOR CARBON FIBER PROCESSING AND PITCH DENSIFICATION 审中-公开
    碳纤维加工和沥青渗透的设备

    公开(公告)号:US20120153528A1

    公开(公告)日:2012-06-21

    申请号:US12971325

    申请日:2010-12-17

    IPC分类号: B29C43/02

    摘要: A pitch densification apparatus may be used to form a carbon-carbon composite material. The apparatus may be used to compress a carbon fiber material, and, thereafter, pitch densify the carbon fiber material. The compression and pitch densification of the carbon fiber material may be carried out within the same mold cavity of the pitch densification apparatus. In one example, an apparatus may comprise a mold defining a mold cavity that is configured to receive a material to be densified. The mold cavity is configured to be adjusted from a first volume to a second volume less than the first volume to compress the material in the mold cavity. The example apparatus may further comprise a gas source configured to apply a gas pressure in the mold cavity to force pitch into the material in the mold cavity to densify the material, and a vacuum source configured to create a vacuum pressure in the mold cavity at least prior to the application of the gas pressure.

    摘要翻译: 沥青密实化装置可用于形成碳 - 碳复合材料。 该装置可用于压缩碳纤维材料,此后,沥青使碳纤维材料致密化。 碳纤维材料的压缩和沥青密实度可以在沥青密实化装置的相同模腔内进行。 在一个示例中,设备可以包括限定模腔的模具,其被配置为接收要被致密化的材料。 模腔被构造成从第一体积调节到小于第一体积的第二体积,以压缩模腔中的材料。 该示例性装置可以进一步包括气源,该气源构造成将气体压力施加到模具腔中以迫使沥青进入模腔中的材料以使材料致密化;以及真空源,其构造成在模腔中至少产生真空压力 在施加气体压力之前。

    Wear resistance in carbon fiber friction materials
    4.
    发明授权
    Wear resistance in carbon fiber friction materials 失效
    碳纤维摩擦材料的耐磨性

    公开(公告)号:US06691393B2

    公开(公告)日:2004-02-17

    申请号:US10036793

    申请日:2001-11-08

    IPC分类号: B23P1700

    摘要: Carbon fiber brake preforms (20), specifically, annular discs built up of fabric arc segments (21) composed of continuous fibers (25) and staple fibers (26). Most of the continuous fibers (25) in the fabric segments (21) are arranged to be located within 60° of radially from the inner diameter to the outer diameter of the annular disc (20). The fabric arc segments have substantially all of their continuous fibers oriented in the radial direction and parallel to the segment arc bisector, or the segments are arranged in alternating layers in which, respectively, half the continuous fibers are oriented at a +45 degree angle with respect to the segment arc bisector and half the continuous fibers are oriented at a −45 degree angle with respect thereto. Methods for making preform composites comprise providing needle-punched nonwoven fabric of unidirectional continuous fibers and staple fibers, making a plurality of fabric segments, arranging the segments in a multilayered intermediate, heating the multilayered intermediate to convert the fibers to carbon, and densifying the carbonized product. In brake discs made as described, fiber pull-out is minimized, reducing mechanical wear. The disclosed preform fiber architecture reduces wear rates while maintaining brake disc strength.

    摘要翻译: 碳纤维制动预成型件(20)具体地,由连续纤维(25)和短纤维(26)构成的织物弧段(21)构成的环形盘。 织物部分(21)中的大部分连续纤维(25)布置成位于径向从环形盘(20)的内径到外径的径向60°内。 织物弧段具有基本上所有的连续纤维在径向方向上定向并平行于弧段平分线,或者分段以交替的层布置,其中连续纤维的一半分别与+45度角定向, 相对于分段弧平分线,连续光纤的一半相对于其成一角度-45度。 制备预成型复合材料的方法包括提供单向连续纤维和短纤维的针刺非织造织物,制成多个织物片段,将片段设置在多层中间体中,加热多层中间体以将纤维转化成碳,并使碳化 产品。 在如上所述制造的制动盘中,光纤拉出最小化,减少机械磨损。 所公开的预制纤维结构在保持制动盘强度的同时降低了磨损率。

    LOW COST, HIGH DENSITY C-C COMPOSITES DENSIFIED BY CVD/CVI FOR AIRCRAFT FRICTION MATERIALS
    5.
    发明申请
    LOW COST, HIGH DENSITY C-C COMPOSITES DENSIFIED BY CVD/CVI FOR AIRCRAFT FRICTION MATERIALS 有权
    低成本,高密度C-C复合材料被CVD / CVI用于飞机摩擦材料

    公开(公告)号:US20100293769A1

    公开(公告)日:2010-11-25

    申请号:US12469384

    申请日:2009-05-20

    IPC分类号: D04H1/46

    摘要: Carbon-carbon composites made by needling together woven or nonwoven fabric made from carbon-containing fibers followed by carbonizing the fabric preforms. The carbon fiber preforms can be needled either in a carbonized or in an uncarbonized state. The un-carbonized fiber preforms would go through a carbonization/heat-treat step following the needling process. Final preform thickness and fiber volume is also controlled at carbonization, for instance by varying the level of pressure applied to the preforms during carbonization. Thus, the preforms may be unconstrained during carbonization (i.e., no pressure is applied to them). Or the preforms may be constrained during carbonization, typically by means of applying pressure (e.g., weight placed on top of the preforms). The preforms are then infiltrated via CVD/CVI processing in order to increase their density, resulting in a carbon-carbon composite which is suitable for use as, for instance, a brake disc or pad in aircraft and automotive brake systems.

    摘要翻译: 通过将由含碳纤维制成的织造或无纺织物针刺在一起而制成的碳 - 碳复合材料,然后将织物预制件碳化。 碳纤维预制件可以以碳化或未碳化的状态进行针刺。 未碳化纤维预制棒将经过针刺过程之后的碳化/热处理步骤。 最终的预成型件厚度和纤维体积也可以通过碳化来控制,例如通过改变在碳化过程中施加到预制件上的压力水平。 因此,在碳化期间(即,没有施加压力),预制件可能是不受约束的。 或者,在碳化期间,预制件可能被约束,通常通过施加压力(例如,放置在预制件顶部上的重量)。 然后通过CVD / CVI处理渗透预成型件,以增加它们的密度,产生适合用作飞机和汽车制动系统中的制动盘或垫的碳 - 碳复合材料。

    Closing mechanism for a harvester safety door
    6.
    发明授权
    Closing mechanism for a harvester safety door 失效
    收割机安全门关闭机构

    公开(公告)号:US4262679A

    公开(公告)日:1981-04-21

    申请号:US134746

    申请日:1980-03-27

    申请人: Mark C. James

    发明人: Mark C. James

    IPC分类号: A01F12/16

    CPC分类号: A01F12/16

    摘要: A pivoted safety door for a harvester is disposed ahead of the concave and has a separately pivoted lip which normally rests on a front edge of the concave. An adjustably biased detent mechanism releases the lip, permitting it to pivot out of engagement with the concave, when a rock or the like of substantial size attempts to enter the threshing chamber and is engaged by the threshing rotor. A first manual control is provided for pivoting the main body of the door from its tripped position to a closed position. A second manual control is provided for pivoting the lip relative to the door to restore it to its detented position, this last mentioned function being effected after the main body of the door has been restored to a closed position. The detent mechanism for the lip includes a pair of adjustably loaded spring biased plungers which act on opposite sides of a detented part. The laterally opposite ends of the safety door are sealed in relation to vertical walls of the harvester by a pair of special seal structures which are pivoted to the harvester coaxially with the main body of the safety door. The seal structures each include a rigid longitudinal sealing member in overlapping relation to one end of main body of the safety door with a free end loosely connecting with the leading edge of the concave and includes a flexible sealing element in engagement with the adjacent vertical wall. The rear ends of the seal structures and safety door rest on and move up and down with the front of the concave when the latter is adjusted to change the clearance between the concave and the threshing rotor. The seal structures also serve as stops to limit upward swinging movement of the safety door at the time it is closed to its operating position.

    摘要翻译: 用于收割机的枢转安全门设置在凹部之前,并且具有通常搁置在凹部的前边缘上的单独枢转的唇部。 当具有相当尺寸的岩石等试图进入脱粒室并且由脱粒转子接合时,可调节偏置的止动机构释放唇缘,允许其枢转离开与凹部的接合。 提供第一手动控制器,用于将门的主体从其跳闸位置枢转到关闭位置。 提供第二手动控制以使唇缘相对于门枢转以将其恢复到其定位位置,这最后提到的功能是在门的主体已经恢复到关闭位置之后进行的。 用于唇缘的止动机构包括一对可调节地加载的弹簧偏置的柱塞,其作用在定位部件的相对侧上。 安全门的横向相对端部通过一对特殊的密封结构相对于收割机的垂直壁密封,该密封结构与安全门的主体同轴地枢转到收割机。 密封结构各自包括与安全门的主体的一端重叠的刚性纵向密封构件,其具有与凹部的前缘松散地连接的自由端,并且包括与相邻垂直壁接合的柔性密封元件。 密封结构和安全门的后端在调整后改变凹头和脱粒转子之间的间隙时,与凹面的前部上下移动。 密封结构还用作止挡件,以限制安全门在其关闭时的向上摆动运动到其操作位置。

    Centrifugal pump stage with abrasion resistant elements
    7.
    发明授权
    Centrifugal pump stage with abrasion resistant elements 失效
    带耐磨元件的离心泵级

    公开(公告)号:US4781531A

    公开(公告)日:1988-11-01

    申请号:US108197

    申请日:1987-10-13

    申请人: Mark C. James

    发明人: Mark C. James

    IPC分类号: F04D29/02 F04D29/62

    摘要: A centrifugal submersible pump has wear resistant features to resist erosion due to sand laden fluid from a well. The pump has a plurality of stages, each having a diffuser and an impeller located within a housing. The diffuser has a sleeve in its inner portion that has a flange on its upper end. The sleeve is a separate component from the remaining portions of the diffuser and harder. The impeller has a vane section and a hub. The hub is carried inside the sleeve. The hub has a flange that bears against the flange of the diffuser sleeve. The impeller hub is a separate component from the vane section of the impeller and is of a harder material.

    摘要翻译: 离心式潜水泵具有耐磨特性,可以防止由于来自井的含沙液体而导致的侵蚀。 泵具有多个级,每个级具有位于壳体内的扩散器和叶轮。 扩散器在其内部具有套筒,其上端具有凸缘。 套筒是与扩散器的其余部分分离的部件,更硬。 叶轮具有叶片部分和轮毂。 轮毂装在套筒内。 轮毂有一个凸缘抵靠扩散套筒的凸缘。 叶轮轮毂是与叶轮的叶片部分分离的部件,是较硬的材料。

    Clutch for belt drive with means for limiting start-up torque
    8.
    发明授权
    Clutch for belt drive with means for limiting start-up torque 失效
    用于皮带传动的离合器,用于限制启动扭矩

    公开(公告)号:US4381165A

    公开(公告)日:1983-04-26

    申请号:US212020

    申请日:1980-12-01

    IPC分类号: F16H7/08 F16H7/12

    CPC分类号: F16H7/0827 F16H2007/0893

    摘要: The bin unloader belt drive for a combine includes a clutching idler mechanism in which the start-up torque delivered by the belt (11) from a drive pulley (12) to a driven pulley (13) is limited by using a dampener (51) which retards the spring biased movement of a clutching idler pulley (21) from its drive disestablishing position to its drive establishing position.

    摘要翻译: 用于组合的垃圾箱卸载器带驱动器包括离合器惰轮机构,其中由带(11)从驱动带轮(12)传递到从动带轮(13)的启动扭矩通过使用阻尼器(51)来限制, 其阻止了离合器惰轮(21)从其驱动器拆卸位置到其驱动建立位置的弹簧偏置运动。

    Electric submersible pump with specialized geometry for pumping viscous crude oil
    9.
    发明授权
    Electric submersible pump with specialized geometry for pumping viscous crude oil 有权
    用于泵送粘性原油的专用几何电动潜水泵

    公开(公告)号:US07409997B2

    公开(公告)日:2008-08-12

    申请号:US10946892

    申请日:2004-09-22

    IPC分类号: E21B43/00 F04B25/00 F04B49/06

    CPC分类号: E21B43/128

    摘要: A centrifugal pump has impellers for pumping low flow, high viscous materials. The impellers have high exit angles greater than 30 degrees and preferably greater than 50 degrees. The impellers and diffusers have specific geometry that varies with viscosity. The pump has zones of impellers and diffusers with the exit angles and geometry in the zones differing from the other zones. The exit angles decrease and geometry varies in a downstream direction to account for a lower viscosity occurring due to heat being generated in the pump. One design employs small diameter impellers and high rotational speeds.

    摘要翻译: 离心泵具有用于泵送低流量,高粘度材料的叶轮。 叶轮的出口角度大于30度,优选大于50度。 叶轮和扩散器具有随着粘度变化的特定几何形状。 泵具有叶轮和扩散器的区域,出口角度和区域中的几何形状与其他区域不同。 出口角度下降,并且几何形状在下游方向上变化,以考虑由于在泵中产生热而发生较低的粘度。 一种设计采用小直径叶轮和高转速。