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公开(公告)号：US6123533A
公开(公告)日：2000-09-26
申请号：US41968
申请日：1998-03-13
CPC分类号： F04C15/0049 , F04C2/084 , F04C2/20
摘要： A positive displacement gear pump useful for pumping hydraulic fluid includes a drive gear and an idler gear. In a first embodiment, the drive gear has symmetrical teeth, whereas the idler gear has asymmetrical teeth. The asymmetrical teeth of the idler gear include working surfaces which have a profile corresponding to the profile of the working and non-working surfaces of the drive gear, but have a non-working surface which has been relieved so as to be substantially flat. Consequently, in the zone of the pump where the gears mesh, a large backlash is created which substantially prevents bubble formation. In a second embodiment, the drive gear, as well as the idler gear, have non-contact surfaces which are substantially flat to create even a larger backlash for relieving cavitation when the teeth are made wider in the axial direction. By preventing bubble formation, cavitation which occurs at high pump speeds is substantially eliminated, thus avoiding pump damage which results from cavitation.
摘要翻译： 用于泵送液压流体的正排量齿轮泵包括驱动齿轮和空转齿轮。 在第一实施例中，驱动齿轮具有对称的齿，而空转齿轮具有不对称的齿。 空转齿轮的不对称齿包括工作表面，其工作表面具有对应于驱动齿轮工作表面和非工作表面轮廓的轮廓，但是具有已被释放以使其基本平坦的非工作表面。 因此，在齿轮啮合的泵的区域中，产生大大的齿隙，其基本上防止气泡形成。 在第二实施例中，驱动齿轮以及空转齿轮具有非接触表面，该接触表面基本上是平坦的，以产生更大的齿隙，用于当齿在轴向上变宽时减轻气蚀。 通过防止气泡形成，基本上消除了在高泵速下发生的空化，从而避免了由空化引起的泵损坏。
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公开(公告)号：US5363649A
公开(公告)日：1994-11-15
申请号：US452521
申请日：1989-12-18
IPC分类号： F16H39/02 , F16H61/40 , F16H61/4026 , F16H61/4148 , F16D31/00
CPC分类号： F16H61/4148 , F16H39/02 , F16H61/40 , F16H61/4026
摘要： A hydraulic pressure system includes a pump and a dry valve situated in the inlet of the pump, the dry valve being actuated by a pilot valve capable of capturing the pressure differentials between inlet and outlet of the pump for shifting the dry valve between opened and closed positions. In the dry operational mode, the pump inlet operates at a pressure below atmospheric, thus providing a pressure differential substantial enough to move the dry valve to an opened position. In the preferred form, the pilot valve is a solenoid actuated two-position, four-way, spring loaded valve. The dry valve is a gate valve directly coupled to a fluid control motor.
摘要翻译： 液压系统包括位于泵的入口中的泵和干阀，干阀由能够捕获泵的入口和出口之间的压力差的先导阀致动，以将干阀在打开和关闭之间移动 职位 在干式操作模式中，泵入口处于低于大气压的压力下，从而提供足够大的压力使干阀移动到打开位置。 在优选形式中，先导阀是螺线管致动的两位四通弹簧加载阀。 干阀是直接联接到流体控制电动机的闸阀。
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公开(公告)号：US4336005A
公开(公告)日：1982-06-22
申请号：US201475
申请日：1980-10-28
申请人： James R. McBurnett , James M. Eley
发明人： James R. McBurnett , James M. Eley
CPC分类号： F04C15/0019
摘要： The disclosure relates to improvements in pumps and motors of the gear type. The gear elements are arranged within the pump or motor housing so that the ends or the tips of the teeth are spaced out of fluid sealing relationship and not pressed into the surrounding chamber wall on the low pressure side of the housing. Rigid sealing members of limited circumferential extent having a curved sealing surface and planar support and side wall surfaces are seated in a recess in the housing at the high pressure side of the gears for the purpose of providing a fluid seal between the tips of the teeth in a limited region adjacent the opening in the housing which is at higher pressure. The sealing members are positioned in a recess in the housing and are configured to be resistant to bending and movement. The sole support for the shoes is provided by planar surfaces on the side pressure plates.
摘要翻译： 本公开涉及齿轮类型的泵和马达的改进。 齿轮元件布置在泵或马达壳体内，使得齿的端部或尖端与流体密封关系间隔开，并且不被压入壳体的低压侧的周围室壁。 具有弯曲密封表面和平面支撑件和侧壁表面的有限圆周范围的刚性密封构件位于齿轮的高压侧的壳体中的凹部中，以便在齿的尖端之间提供流体密封 邻近壳体中处于较高压力的开口的有限区域。 密封构件定位在壳体中的凹部中并且被构造成抵抗弯曲和移动。 鞋底的唯一支撑由侧压板上的平面表面提供。
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公开(公告)号：US5145349A
公开(公告)日：1992-09-08
申请号：US684618
申请日：1991-04-12
申请人： James R. McBurnett
发明人： James R. McBurnett
IPC分类号： F04C15/00
CPC分类号： F04C15/0042
摘要： A gear pump which includes a pressure balancing structure to ensure balanced pressure within the pump chamber during low flow operation is disclosed. A groove is formed in the casing internal surface throughout the entire axial length of the gears and supplies high pressure fluid to positions within the pump chamber which are at a high pressure during normal flow operation. This groove thus ensures that high pressure fluid will be at all locations within the pump chamber which are expected to have high pressure during normal pumping operation. Forces on the gear are as expected during low flow operation, and that the gears will not be forced in an undesirable direction.
摘要翻译： 公开了一种齿轮泵，其包括压力平衡结构，以在低流量操作期间确保泵室内的平衡压力。 在齿轮的整个轴向长度处，在壳体内表面上形成凹槽，并且在正常流动操作期间将高压流体供应到处于高压的泵室内的位置。 因此，该凹槽确保高压流体将在泵室内的所有位置处，预期在正常泵送操作期间将具有高压。 在低流量操作期间，齿轮上的力是预期的，并且齿轮不会被迫在不期望的方向。
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公开(公告)号：US4089166A
公开(公告)日：1978-05-16
申请号：US554522
申请日：1975-03-03
CPC分类号： F15B11/17 , F15B2211/20538 , F15B2211/20576 , F15B2211/50536 , F15B2211/5157 , F15B2211/528 , F15B2211/65 , F15B2211/7142
摘要： A control system for plural circuits having motor-driven hydraulic pumps. As disclosed, a pair of pumps is connected in a hydraulic actuating circuit individual to that pair and the circuit includes an hydraulically operated actuator to be advanced and retracted by fluid under pressure delivered from the pair of pumps of that circuit. A single prime mover drives the pair of pumps and pumps in other circuits, and each circuit has a pressure-responsive control valve which provides for unloading a pump of the first circuit in response to increases in pressure in the various other circuits to a predetermined value at which, in the absence of such unloading, the input horsepower requirement has risen toward a value which would stall the prime mover.Pumps in several of the circuits may be sequentially and selectively unloaded.
摘要翻译： 一种具有电动液压泵的多个电路的控制系统。 如所公开的那样，一对泵连接在液压致动回路中，该液压驱动回路独立于该对，并且该回路包括一个液压操作的致动器，该液压驱动致动器由在该回路的一对泵输送的压力下被流体压缩。 单个原动机驱动其它回路中的一对泵和泵，并且每个回路具有压力响应控制阀，其响应于各种其它回路中的压力增加而将第一回路的泵卸载到预定值 在没有这种卸载的情况下，输入马力要求已经上升到将导致原动机停止的值。几个回路中的泵可以被顺序地和选择性地卸载。
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公开(公告)号：US4013138A
公开(公告)日：1977-03-22
申请号：US526279
申请日：1974-11-22
申请人： James R. McBurnett
发明人： James R. McBurnett
CPC分类号： B62D5/32
摘要： An emergency hydraulic system for a hydraulically powered device such as the power steering mechanism used on large earth-moving vehicles and the like is disclosed. The emergency system includes an auxiliary pump connected to the wheels or some other part of the vehicle so that the pump is operated despite engine failure whenever the vehicle is in motion. An inlet valve for the pump is held in the closed position whenever the vehicle prime mover is in operation so that the pump is deprived of operating fluid when an emergency condition does not exist. If the prime mover stops running so that the main hydraulic system is not operating and the power steering system is deprived of its source of power, the inlet to the emergency pump is opened so that the pump supplies operating fluid to the steering system so long as the vehicle is in motion. Since the pump is deprived of operating fluid when an emergency does not exist very little power is consumed.
摘要翻译： 公开了一种用于液压动力装置的紧急液压系统，例如用于大型移动车辆的动力转向机构等。 应急系统包括连接到车轮或车辆的其他部分的辅助泵，使得在车辆运动时发动机故障。 每当车辆原动机运行时，泵的入口阀都保持在关闭位置，以便当紧急情况不存在时，泵被剥夺工作流体。 如果原动机停止运行，使得主液压系统不工作，并且动力转向系统被剥夺其动力源，则应急泵的入口被打开，使得泵将操作流体提供给转向系统，只要 车辆在运动。 由于当紧急情况不存在时，泵被剥夺了工作流体，所以消耗的功率很小。
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公开(公告)号：US3958657A
公开(公告)日：1976-05-25
申请号：US565716
申请日：1975-04-07
申请人： James R. McBurnett
发明人： James R. McBurnett
CPC分类号： F15B11/17 , B62D5/32 , F15B2211/20561 , F15B2211/20576 , F15B2211/30505 , F15B2211/3052 , F15B2211/613
摘要： An Emergency or back-up Hydraulic System for use with a primary hydraulic system in motor operated equipment is disclosed. The system illustrated is a steering system for a vehicle and includes a motor driven pump and a wheel driven pump for supplying hydraulic fluid to the steering system of the vehicle. The motor driven pump and the wheel driven pump are connected in series so that the fluid discharged from the motor driven pump is supplied to the inlet of the wheel driven pump. The inlet of the wheel driven pump also communicates with the reservoir as for example through the anticavitation check for the engine driven pump. By-pass connections are provided around the wheel driven pump so that fluid in excess of the demands of that pump are channelled to the steering circuit when the engine driven pump is in operation. The system disclosed provides that the demands of the wheel driven pump are met by the engine driven pump and/or the reservoir depending upon the relative speeds and capacities of the engine and the wheel driven pumps. The system disclosed is flow limiting so that the steering or other hydraulic system is not overwhelmed when both pumps are in operation.
摘要翻译： 公开了一种用于电动操作设备中的主要液压系统的紧急或备用液压系统。 所示的系统是用于车辆的转向系统，并且包括马达驱动泵和用于将液压流体供应到车辆的转向系统的轮驱动泵。 马达驱动泵和轮驱动泵串联连接，使得从马达驱动泵排出的流体被供给到轮驱动泵的入口。 轮式驱动泵的入口还与储存器连通，例如通过用于发动机驱动泵的防空气检查。 旁路连接设置在轮驱动泵周围，使得当发动机驱动泵运行时，超过该泵的需求的流体被引导到转向回路。 所公开的系统规定，根据发动机和轮式驱动泵的相对速度和容量，发动机驱动的泵和/或储存器满足轮式驱动泵的要求。 所公开的系统是流量限制，使得当两个泵都在运行时转向或其他液压系统不会被压倒。
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公开(公告)号：US4828462A
公开(公告)日：1989-05-09
申请号：US131062
申请日：1987-12-10
申请人： James R. McBurnett
发明人： James R. McBurnett
摘要： A system for detecting when the pressure on a bi-directional hydraulic device, such as a motor or a pump, exceeds a predetermined pressure. The device is of the type having two meshing gears mounted to rotate in a housing. Fluid inlet and outlet ports are located in the housing on opposite sides of the meshing gear teeth. A pilot port is located in the housing to detect the fluid pressure between one gear and the housing at a location isolated from the inlet and outlet ports. The sensed pressure is a function of the maximum pressure at the inlet and outlet ports.
摘要翻译： 用于检测诸如电动机或泵之类的双向液压装置上的压力何时超过预定压力的系统。 该装置是具有安装成在壳体中旋转的两个啮合齿轮的类型的装置。 流体入口和出口位于啮合齿轮齿相对侧的外壳中。 导向口位于壳体中，以在与入口和出口隔离的位置处检测一个齿轮和壳体之间的流体压力。 感测到的压力是入口和出口端口处的最大压力的函数。
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公开(公告)号：US4762195A
公开(公告)日：1988-08-09
申请号：US092766
申请日：1987-09-02
申请人： James R. McBurnett
发明人： James R. McBurnett
CPC分类号： B62D5/30
摘要： An hydraulic steering system for a ground-engaging, self-powered vehicle, the system including an engine driven primary pump for pumping hydraulic fluid to the steering system when the vehicle engine is operating and a wheel-driven secondary pump for pumping hydraulic fluid to the steering system when the vehicle is in motion, even if the engine or the engine driven primary pump is inoperable, or if the output of the engine driven primary pump is inadequate. The wheel-driven secondary pump is an over-center, axial piston pump which is controlled so that it is unidirectional in its output regardless of any change in direction of its input power source and which, thus, avoids the need for check valves in the hydraulic lines of the secondary pumping system, regardless of whether the vehicle is moving forward or in reverse when the engine becomes inoperable.
摘要翻译： 一种用于地面接合的自动动力车辆的液压转向系统，该系统包括发动机驱动的主泵，用于当车辆发动机运行时将液压流体泵送到转向系统，以及用于将液压流体泵送到 即使发动机或发动机驱动的主泵不能操作，或者如果发动机驱动的主泵的输出不足，则车辆运动时的转向系统。 轮式二级泵是一种过中心的轴向柱塞泵，其被控制成使其在其输出中是单向的，而不管其输入动力源的方向有何变化，因此避免了在 二次泵送系统的液压管路，无论车辆是否在发动机变得不可操作时正向或反向运动。
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公开(公告)号：US4746276A
公开(公告)日：1988-05-24
申请号：US20007
申请日：1987-02-27
申请人： James R. McBurnett , James M. Eley , Kuldip Raina
发明人： James R. McBurnett , James M. Eley , Kuldip Raina
CPC分类号： F04C14/24
摘要： A dry valve for a gear pump includes a piston having a valve head and a piston head mounted on the opposite ends of a piston rod. The piston is selectively movable between an opened position, wherein hydraulic fluid is permitted to flow from a reservoir to a pumping chamber of the gear pump, and a closed position, wherein such flow is obstructed. A source of pressurized air exerts a biasing force against the piston head to selectively move the piston. An outlet port of the gear pump is connected through a feedback passageway to the dry valve. The feedback passageway communicates with the side of a chamber in which the piston rod of the dry valve reciprocates between the opened and closed positions. When the dry valve is in the opened position, the pressurized fluid from the outlet port of the gear pump exerts a side-loading pressure against the piston rod, causing a frictional force to be generated between the piston rod and the piston rod chamber which resists relative movement.
摘要翻译： 用于齿轮泵的干式阀包括具有安装在活塞杆的相对端上的阀头和活塞头的活塞。 活塞可选择性地在允许液压流体从储存器流到齿轮泵的泵送室的打开位置和闭合位置之间移动，其中阻塞该流动。 加压空气源对活塞头施加偏置力以选择性地移动活塞。 齿轮泵的出口通过反馈通道连接到干阀。 反馈通道与腔室的一侧连通，其中干阀的活塞杆在打开和关闭位置之间往复运动。 当干阀处于打开位置时，来自齿轮泵的出口的加压流体对活塞杆施加侧向加载压力，导致在活塞杆和活塞杆室之间产生摩擦力， 相对运动
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