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    • 71. 发明授权
    • Hydraulic actuator for a servomotor with an end lock function
    • 具有端锁功能的伺服电机的液压执行器
    • US07624671B2
    • 2009-12-01
    • US11703314
    • 2007-02-07
    • Brian NielsenOle PlougChad M. Patterson
    • Brian NielsenOle PlougChad M. Patterson
    • F15B11/00F16H61/42
    • F15B11/006F15B11/003F15B20/002F15B20/008F15B2211/30505F15B2211/30575F15B2211/40507F15B2211/7653F15B2211/8755F16H61/433
    • A hydraulic actuator for a hydraulic servomotor (4) is disclosed. The hydraulic servomotor (4) is of a kind having at least one defined end position, and has a first chamber (5) and a second chamber (6) associated therewith. The actuator is connected to a fluid source (2) and a fluid drain (3). The actuator comprises a first valve (7) fluidly connected between the fluid source (2) and the first chamber (5), a second valve (8) fluidly connected between the first chamber (5) and the fluid drain (3), and a third valve (9) fluidly connected between the fluid source (2) and the second chamber (6). The actuator further comprises a flow channel (10, 17), preferably comprising a flow restrictor (12, 18), in fluid communication with the second chamber (6).The valves (7, 8, 9) are such that, in the case of a power cut off, they will prevent a fluid flow out of the first chamber (5), and a fluid flow out of the second chamber (6) takes place via the flow channel (10, 17). This will cause a servomotor piston member (13) to move towards the second chamber (6), thereby moving the hydraulic servomotor (4) to an end position.
    • 公开了一种用于液压伺服电动机(4)的液压致动器。 液压伺服电动机(4)具有至少一个限定的端部位置,并且具有与其相关联的第一室(5)和第二室(6)。 致动器连接到流体源(2)和流体排放(3)。 致动器包括流体连接在流体源(2)和第一室(5)之间的第一阀(7),流体连接在第一室(5)和流体排放口(3)之间的第二阀(8),以及 流体连接在流体源(2)和第二室(6)之间的第三阀(9)。 致动器还包括流动通道(10,17),优选地包括与第二腔室(6)流体连通的限流器(12,18)。 阀(7,8,9)使得在断电的情况下,它们将防止流体从第一腔室(5)流出,并且流出第二腔室(6)的流体 通过流动通道(10,17)放置。 这将使伺服马达活塞构件(13)朝向第二腔室(6)移动,从而将液压伺服马达(4)移动到终点位置。
    • 72. 发明授权
    • Forestry machine with hydraulic system and method for rotor braking
    • 具有液压系统的林业机械和转子制动方法
    • US07621112B2
    • 2009-11-24
    • US11174244
    • 2005-07-01
    • Michael S. SlatteryRobert G. Hentz
    • Michael S. SlatteryRobert G. Hentz
    • A01D69/00
    • F15B20/00F15B11/0445F15B2211/20546F15B2211/30525F15B2211/3111F15B2211/50581F15B2211/555F15B2211/615F15B2211/62F15B2211/7058F15B2211/853F15B2211/8755F16D57/06Y02E10/38
    • Embodiments relate to braking high-speed rotational cutting equipment. In particular, some embodiments relate to forestry machinery having a cutting or mower apparatus, and further having a hydraulic brake. The brake includes a counterbalance valve which pressurizes fluid at the motor outlet to a predetermined level when flow of hydraulic fluid from a pump to a motor is discontinued. The hydraulic brake may include a restrictor orifice to reduce sudden pressure increases on the motor. The predetermined pressure level may be between about 2000 psi and about 4000 psi and the orifice may have a diameter of between about 0.025 and 0.040 inches. The counterbalance vent port can hydraulically connect to the motor case line. An anti-cavitation valve can be at the counterbalance valve port and can supply fluid to the motor inlet after the flow from the pump discontinues. Additional embodiments include related hydraulic control systems and methods.
    • 实施例涉及制动高速旋转切割设备。 特别地,一些实施例涉及具有切割或割草机设备的林业机械,并且还具有液压制动器。 制动器包括平衡阀,当来自泵到电动机的液压流体的流动停止时,该平衡阀将马达出口处的流体加压到预定水平。 液压制动器可以包括节流孔,以减少马达上的突然的压力增加。 预定的压力水平可以在约2000psi和约4000psi之间,并且孔可以具有在约0.025和0.040英寸之间的直径。 平衡排气口可以液压连接到电机外壳线。 防气蚀阀可以在平衡阀口处,并且可以在从泵停止流动之后向流体提供流体。 附加实施例包括相关的液压控制系统和方法。
    • 74. 发明申请
    • Hydraulic actuator for a servomotor with an end lock function
    • 具有端锁功能的伺服电机的液压执行器
    • US20080184874A1
    • 2008-08-07
    • US11703314
    • 2007-02-07
    • Brian NielsenOle PlougChad M. Patterson
    • Brian NielsenOle PlougChad M. Patterson
    • F15B13/16
    • F15B11/006F15B11/003F15B20/002F15B20/008F15B2211/30505F15B2211/30575F15B2211/40507F15B2211/7653F15B2211/8755F16H61/433
    • A hydraulic actuator for a hydraulic servomotor (4) is disclosed. The hydraulic servomotor (4) is of a kind having at least one defined end position, and has a first chamber (5) and a second chamber (6) associated therewith. The actuator is connected to a fluid source (2) and a fluid drain (3). The actuator comprises a first valve (7) fluidly connected between the fluid source (2) and the first chamber (5), a second valve (8) fluidly connected between the first chamber (5) and the fluid drain (3), and a third valve (9) fluidly connected between the fluid source (2) and the second chamber (6). The actuator further comprises a flow channel (10, 17), preferably comprising a flow restrictor (12, 18), in fluid communication with the second chamber (6).The valves (7, 8, 9) are such that, in the case of a power cut off, they will prevent a fluid flow out of the first chamber (5), and a fluid flow out of the second chamber (6) takes place via the flow channel (10, 17). This will cause a servomotor piston member (13) to move towards the second chamber (6), thereby moving the hydraulic servomotor (4) to an end position.
    • 公开了一种用于液压伺服电动机(4)的液压致动器。 液压伺服电动机(4)具有至少一个限定的端部位置,并且具有与其相关联的第一室(5)和第二室(6)。 致动器连接到流体源(2)和流体排放(3)。 致动器包括流体连接在流体源(2)和第一室(5)之间的第一阀(7),流体连接在第一室(5)和流体排放口(3)之间的第二阀(8),以及 流体连接在流体源(2)和第二室(6)之间的第三阀(9)。 致动器还包括流动通道(10,17),优选地包括与第二腔室(6)流体连通的限流器(12,18)。 阀(7,8,9)使得在断电的情况下,它们将防止流体从第一腔室(5)流出,并且流出第二腔室(6)的流体 通过流动通道(10,17)放置。 这将使伺服马达活塞构件(13)朝向第二腔室(6)移动,从而将液压伺服马达(4)移动到终点位置。
    • 75. 发明申请
    • Valve arrangement
    • 阀门布置
    • US20050274419A1
    • 2005-12-15
    • US11149904
    • 2005-06-10
    • Henrik HjorthJens Vester
    • Henrik HjorthJens Vester
    • F15B20/00F16K37/00
    • F15B20/008F15B13/0867F15B2211/8636F15B2211/87F15B2211/8755Y10T137/8175Y10T137/8242Y10T137/87885
    • The invention concerns a valve arrangement (1) with a high-pressure connection (P), a low-pressure connection (T), at least one control valve (2 to 5), which is accommodated in a control valve module and has at least one working connection (A, B) for a hydraulic consumer (7 to 10), and a safety valve (6), which is accommodated in a safety valve module, and which releases or blocks a passage between the high-pressure connection (P) and the control valves (2 to 5), the control valve module (2 to 5) and the safety valve module (6) being connected to one component group. It is endeavoured to provide a valve arrangement with a high safety level. For this purpose, it is ensured that each control valve (2 to 5, 2′ to 5′) has an error detection device (19), that the safety valve module (6) has a safety switch device (21) and that the component group has a connection (20) between the safety switch device (21) and the error detection device (19).
    • 本发明涉及一种具有高压连接(P),低压连接(T),至少一个控制阀(2至5)的阀门装置(1),其被容纳在控制阀模块中并具有 用于液压消耗器(7至10)的至少一个工作连接(A,B)和容纳在安全阀模块中的安全阀(6),并且其释放或阻挡在高压连接 P)和控制阀(2至5),控制阀模块(2至5)和安全阀模块(6)连接到一个组件组。 提供具有高安全级别的阀门装置。 为此,确保每个控制阀(2至5,2'至5')具有错误检测装置(19),安全阀模块(6)具有安全开关装置(21),并且 组件组在安全开关装置(21)和错误检测装置(19)之间具有连接(20)。