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公开(公告)号：US11555293B2
公开(公告)日：2023-01-17
申请号：US17864379
申请日：2022-07-13
摘要： A prime mover and hydraulic actuators, a hydraulic machine having a rotatable shaft engaged with the prime mover and having a plurality of working chambers, a hydraulic circuit extending between a group of working chambers of the hydraulic machine and the hydraulic actuators, each working chamber of the hydraulic machine having a low-pressure and a high-pressure valve regulating the flow of hydraulic fluid between the working chamber and a corresponding low-pressure manifold and a high-pressure manifold. The hydraulic machine controlling the low-pressure valves of the group of working chambers to select the net displacement of hydraulic fluid by each working chamber on each cycle of working chamber volume, and thereby the net displacement of hydraulic fluid by the group of working chambers, responsive to a demand signal, the apparatus further having a controller calculating the demand signal responsive to a measured property of the hydraulic circuit or an actuator.
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公开(公告)号：US11137330B2
公开(公告)日：2021-10-05
申请号：US16253730
申请日：2019-01-22
IPC分类号： G01N3/36 , F15B15/18 , G01M5/00 , F03C1/34 , F03C1/053 , F04B49/22 , F04B7/00 , F03C1/40 , F03C1/047
摘要： An object is displaced alternately in opposite directions, using a hydraulic power unit having a rotatable body which includes the shaft of a hydraulic machine having electronically commutated valves. A motor drives the rotatable body. The hydraulic machine drives an actuator to displace the object in use. Energy is transformed from rotational kinetic energy of the rotatable body to elastic strain energy or elastic strain and gravitational potential energy of the object during a pumping phase and rotation of the rotatable body slows, but does not change direction. The potential energy then drives the hydraulic machine to motor and the rotatable shaft speeds up again, storing rotational kinetic energy. The displacement of the hydraulic machine is controlled throughout to match a time varying demand taking into account the varying speed of rotation of the rotatable shaft. The motor provides energy to compensate for losses and the process can repeat cyclically.
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公开(公告)号：US11022153B2
公开(公告)日：2021-06-01
申请号：US16069632
申请日：2017-01-13
发明人： Matthew Green , Uwe Stein
IPC分类号： F15B11/044 , F04B49/08 , F04B1/12 , F04B1/04 , F04B1/06 , F04B1/16 , E02F9/22 , F04B49/20 , F04B49/22 , F15B11/042 , F15B11/17
摘要： An apparatus comprising a synthetically commutated machine with one or more services, a prime mover coupled to the machine, a hydraulic circuit extending between the services and hydraulic loads to fluidically connect the services to the hydraulic loads such that groups of one or more services are fluidically connected to respective groups of one or more hydraulic loads. The apparatus configured such that the flow of hydraulic fluid to or from a group of services of the machine is controlled responsive to measuring a flow rate and/or pressure requirement of the hydraulic loads which are fluidically connected to the services, or receiving a demand signal indicative of a demanded pressure and/or flow rate based on a pressure and/or flow demand of hydraulic loads which are fluidically connected to the services.
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公开(公告)号：US20200208521A1
公开(公告)日：2020-07-02
申请号：US16729196
申请日：2019-12-27
发明人： Niall CALDWELL , Daniel ABRAHAMS , Andrew LATHAM
摘要： An electronically commutated hydraulic machine is coupled to a drivetrain. Working chambers of the hydraulic machine are connected to low and high pressure manifold through electronically controlled valves. The phase of opening and closing of the valves has a default. In order to avoid cycle failure due to acceleration events, for example due to backlash in the drivetrain, the phase of opening or closing of the electronically controlled valves is temporarily advanced or retarded from the default timing.
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公开(公告)号：US20190010965A1
公开(公告)日：2019-01-10
申请号：US16069632
申请日：2017-01-13
发明人： Matthew GREEN , Uwe STEIN
IPC分类号： F15B11/044 , E02F9/22 , F15B11/042 , F15B11/17 , F04B49/22 , F04B49/08 , F04B49/20
摘要： An apparatus comprising a synthetically commutated machine with one or more services, a prime mover coupled to the machine, a hydraulic circuit extending between the services and hydraulic loads to fluidically connect the services to the hydraulic loads such that groups of one or more services are fluidically connected to respective groups of one or more hydraulic loads. The apparatus configured such that the flow of hydraulic fluid to or from a group of services of the machine is controlled responsive to measuring a flow rate and/or pressure requirement of the hydraulic loads which are fluidically connected to the services, or receiving a demand signal indicative of a demanded pressure and/or flow rate based on a pressure and/or flow demand of hydraulic loads which are fluidically connected to the services.
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公开(公告)号：US09976641B2
公开(公告)日：2018-05-22
申请号：US15022397
申请日：2014-02-25
发明人： Niall Caldwell , Daniel Abrahams , Daniil Dumnov
IPC分类号： F16D31/02 , F16H39/16 , F04B49/06 , F04B49/22 , F03D7/02 , F04B1/053 , F04B1/06 , F04B11/00 , F04B17/02 , F03C1/40 , F03C1/053 , F16H61/4183 , F03D15/00 , F03D9/28 , F16H61/431
CPC分类号： F16H39/16 , F03C1/0447 , F03C1/045 , F03C1/053 , F03C1/0531 , F03D7/0296 , F03D9/25 , F03D9/28 , F03D9/32 , F03D15/00 , F04B1/053 , F04B1/0531 , F04B1/06 , F04B1/063 , F04B11/00 , F04B11/0075 , F04B17/02 , F04B49/065 , F04B49/22 , F05B2260/406 , F16H61/4183 , F16H61/431 , Y02E10/722 , Y02E10/723 , Y02P80/158
摘要： A hydraulic transmission comprising a variable displacement pump and motor, at least one having cylinders having valves which are controllable on each cycle of cylinder working volume to determine the net displacement of working fluid by the cylinder. The transmission has a valve control module which determines a displacement of the pump and the motor by specifying a displacement demand. The pump and/or motor valve control module determine the frequency of intensity peaks in the frequency spectrum of the pattern of cylinders carrying out active and inactive cycles of cylinder working volume using a first procedure and, if these will fall within disallowed frequency bands including the resonant frequency of components with which the transmission is in mechanical communication, the displacement demand, or another input, is periodically modified to suppress generation of those frequencies. The hydraulic transmission is useful for example in a wind turbine generator, or a vehicle.
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公开(公告)号：US09732748B2
公开(公告)日：2017-08-15
申请号：US14771103
申请日：2014-03-03
发明人： Uwe Stein , Jens Eilers , Jack Lavender , Stephen Laird
IPC分类号： F16K11/00 , F04B53/10 , F04B7/00 , F16K31/08 , F16K31/06 , F01B29/10 , F01B31/26 , F04B19/22 , F16K11/04
CPC分类号： F04B53/1087 , F01B29/10 , F01B31/26 , F04B7/0003 , F04B7/0011 , F04B7/0076 , F04B19/22 , F04B53/1082 , F16K11/04 , F16K31/0634 , F16K31/082
摘要： A valve unit for regulating the flow of working fluid between a working chamber of a fluid working machine and both a first working fluid line and second working fluid line, the valve unit comprising: a first valve comprising a first valve member and one or more cooperating first valve seats, a second valve comprising a second valve member and one or more cooperating second valve seats, an actuator coupled to both the first and second valve members through which a force may be applied to urge the first valve member open or closed and to urge the second valve member open or closed, a coupling between the actuator and the first valve member, wherein the coupling between the actuator and the first valve member comprises a connector which extends at least partially through the second valve member.
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公开(公告)号：US20140216244A1
公开(公告)日：2014-08-07
申请号：US14173941
申请日：2014-02-06
发明人： Gordon Voller , Uwe Stein , Jack Lavender , Alex Rampen
IPC分类号： F16J10/02
CPC分类号： F16J10/02 , F01B15/04 , F04B19/027
摘要： A rocking cylinder assembly comprising a cylinder, rotatable about a rocking axis between first and second end positions, having a cylinder bore terminating at a cylinder bearing surface and a cylinder aperture, and a bearing component having a component bore terminating at a component bearing surface and a component aperture. The ratio of the area of the second one of the apertures to the square of the maximum extent of the second one of the apertures in a direction perpendicular to the rocking axis and perpendicular to a second axis for fluid flow is greater than the ratio of the area of the first one of the apertures to the square of the maximum extent of the first one of the apertures in a direction perpendicular to the rocking axis and perpendicular to a first axis for fluid flow.
摘要翻译： 一种摆动缸组件，包括可围绕第一和第二端部位置之间的摆动轴线旋转的气缸，具有终止于气缸轴承表面的气缸孔和气缸孔，以及具有终止于部件轴承表面的部件孔的轴承部件， 组件孔径。 第二个孔的面积与第二个孔的垂直于摇摆轴线并垂直于用于流体流动的第二轴的方向的最大程度的平方的比例大于 所述第一孔中的所述第一孔的面积在垂直于所述摇摆轴线且垂直于用于流体流动的第一轴线的方向上的所述第一孔的最大程度的平方。
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公开(公告)号：US11649727B2
公开(公告)日：2023-05-16
申请号：US16729196
申请日：2019-12-27
发明人： Niall Caldwell , Daniel Abrahams , Andrew Latham
CPC分类号： F01B1/0675 , F04B1/06 , F04B17/02
摘要： An electronically commutated hydraulic machine is coupled to a drivetrain. Working chambers of the hydraulic machine are connected to low and high pressure manifold through electronically controlled valves. The phase of opening and closing of the valves has a default. In order to avoid cycle failure due to acceleration events, for example due to backlash in the drivetrain, the phase of opening or closing of the electronically controlled valves is temporarily advanced or retarded from the default timing.
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公开(公告)号：US20220333620A1
公开(公告)日：2022-10-20
申请号：US17640143
申请日：2020-09-03
发明人： Niall Caldwell , Uwe Stein , Jill Macpherson , Matthew Green , Callan MacKay
摘要： A hydraulic apparatus has a plurality of pump modules each of which is formed by a plurality of working chambers having a common high pressure manifold. A connecting circuit switchably connects pump modules to first and second hydraulic circuit portions to allocate capacity as first and second demands for hydraulic fluid vary. In an apparatus which may have two or more connecting circuit outputs, valves may be controlled or working chamber pumping cycles made inactive to facilitate the reallocation of a pump module from one output to another, and a control strategy addresses pump module allocation when the demands for hydraulic fluid exceed available capacity.
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