公开(公告)号：US08011387B2

公开(公告)日：2011-09-06

申请号：US11823087

申请日：2007-06-26

申请人： Hae Kyun Cheong

发明人： Hae Kyun Cheong

IPC分类号： F15B13/042

CPC分类号： F15B13/0402 ,  G05D16/18 ,  Y10T137/86582 ,  Y10T137/8663 ,  Y10T137/86702

摘要： A pressure control valve for heavy equipment. The pressure control valve can smoothly operate a working device having a high load pressure by limiting a supply of hydraulic fluid to a working device having a low load pressure in the case of simultaneously operating a plurality of working devices in a hydraulic circuit in which a plurality of control valves (e.g., a boom control valve and a bucket control valve) are connected in parallel to a single hydraulic pump.

摘要翻译： 用于重型设备的压力控制阀。 压力控制阀可以通过在液压回路中同时操作多个工作装置的情况下限制向具有低负载压力的工作装置供给液压流体来平稳地操作具有高负载压力的工作装置，其中多个 的控制阀（例如，动臂控制阀和铲斗控制阀）并联连接到单个液压泵。

公开(公告)号：US20050183775A1

公开(公告)日：2005-08-25

申请号：US10862865

申请日：2004-06-07

申请人： Hae Kyun Cheong

发明人： Hae Kyun Cheong

IPC分类号： F16K31/383 ,  F15B11/028 ,  F15B21/08 ,  F16K17/06 ,  F16K17/10

CPC分类号： F15B13/024 ,  F16K17/065 ,  F16K17/105 ,  Y10T137/7766 ,  Y10T137/777 ,  Y10T137/7782

摘要： Disclosed is a pilot operated relief valve, in which a balance system is provided to offset a tank pressure exerted on a piston, so that a setting pressure of a pilot poppet is not changed even when the tank pressure is changed, and thus a function of the relief valve can be stably performed. The pilot operated relief valve is comprised of a sleeve, a main poppet provided to be movable in the sleeve, a seat provided in the sleeve, a housing connected to a rear end of the sleeve, a pilot poppet provided to be movable in the housing, a piston moved by a pilot signal pressure, and the balance system offsetting the tank pressure exerted on the piston.

摘要翻译： 公开了一种先导式安全阀，其中设置有平衡系统以抵消施加在活塞上的罐压力，使得即使当罐压力改变时，先导提升阀的设定压力也不改变，并且因此具有 可以稳定地进行安全阀。 先导式安全阀由套筒构成，主提升阀提供成能够在套筒中移动，设置在套筒中的阀座，连接到套筒后端的壳体，设置成可在壳体中移动的先导阀芯 ，由导向信号压力移动的活塞，以及抵消施加在活塞上的油箱压力的平衡系统。

公开(公告)号：US06986362B2

公开(公告)日：2006-01-17

申请号：US10862865

申请日：2004-06-07

申请人： Hae Kyun Cheong

发明人： Hae Kyun Cheong

IPC分类号： F16K17/10 ,  F16K17/06 ,  F16K31/124 ,  F15B11/028

CPC分类号： F15B13/024 ,  F16K17/065 ,  F16K17/105 ,  Y10T137/7766 ,  Y10T137/777 ,  Y10T137/7782

摘要： Disclosed is a pilot operated relief valve, in which a balance system is provided to offset a tank pressure exerted on a piston, so that a setting pressure of a pilot poppet is not changed even when the tank pressure is changed, and thus a function of the relief valve can be stably performed. The pilot operated relief valve is comprised of a sleeve, a main poppet provided to be movable in the sleeve, a seat provided in the sleeve, a housing connected to a rear end of the sleeve, a pilot poppet provided to be movable in the housing, a piston moved by a pilot signal pressure, and the balance system offsetting the tank pressure exerted on the piston.

摘要翻译： 公开了一种先导式安全阀，其中设置有平衡系统以抵消施加在活塞上的罐压力，使得即使当罐压力改变时，先导提升阀的设定压力也不改变，并且因此具有 可以稳定地进行安全阀。 先导式安全阀由套筒构成，主提升阀提供成能够在套筒中移动，设置在套筒中的阀座，连接到套筒后端的壳体，设置成可在壳体中移动的先导阀芯 ，由导向信号压力移动的活塞，以及抵消施加在活塞上的油箱压力的平衡系统。

公开(公告)号：US08024926B2

公开(公告)日：2011-09-27

申请号：US12246515

申请日：2008-10-07

申请人： Hae Kyun Cheong

发明人： Hae Kyun Cheong

IPC分类号： F16D31/02

CPC分类号： F15B11/17 ,  E02F9/2228 ,  E02F9/2242 ,  E02F9/2292 ,  E02F9/2296 ,  F15B21/042 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/3116 ,  F15B2211/41509 ,  F15B2211/428 ,  F15B2211/45 ,  F15B2211/50509 ,  F15B2211/575 ,  F15B2211/6343 ,  F15B2211/6355 ,  F15B2211/66 ,  F15B2211/7142

摘要： A hydraulic circuit for heavy equipment is disclosed, which utilizes a hydraulic fluid supplied from a hydraulic pump for driving a cooling fan, as a pilot signal pressure, without installing a separate constant displacement pilot pump for supplying the pilot signal pressure to a control valve for controlling the hydraulic fluid to be supplied to a working device such as a boom. The hydraulic circuit includes first to third hydraulic pumps connected to an engine; a first control valve installed in a flow path of the first hydraulic pump; a second control valve installed in a flow path of the second hydraulic pump; a hydraulic motor connected to the third hydraulic pump; a cooling fan, connected to the hydraulic motor, for discharging cooling wind to an oil cooler; a temperature sensor for detecting a temperature of the hydraulic fluid in the hydraulic tank; an electric relief valve, installed in a drain flow path of the third hydraulic pump, for variably controlling a rotation velocity of the cooling fan; a controller for controlling the hydraulic pressure that drives the hydraulic motor; and a pilot pressure generator, installed in a pilot flow path branched and connected to a flow path of the third hydraulic pump, for supplying a pilot signal pressure to the first and second control valves when shifting.

摘要翻译： 公开了一种用于重型设备的液压回路，其利用从液压泵供应的用于驱动冷却风扇的液压流体作为先导信号压力，而不安装单独的恒定位移先导泵，以将先导信号压力提供给控制阀， 控制要供应到诸如吊杆的工作装置的液压流体。 液压回路包括连接到发动机的第一至第三液压泵; 安装在第一液压泵的流路中的第一控制阀; 安装在所述第二液压泵的流路中的第二控制阀; 连接到第三液压泵的液压马达; 冷却风扇，连接到液压马达，用于将冷却风排放到油冷却器; 温度传感器，用于检测液压缸中的液压流体的温度; 安装在所述第三液压泵的排水流路中的电气安全阀，用于可变地控制所述冷却风扇的转速; 用于控制驱动液压马达的液压的控制器; 以及先导式压力发生器，其安装在分支并连接到第三液压泵的流路的先导流路中，用于当换档时向第一和第二控制阀提供先导信号压力。

公开(公告)号：US20080078285A1

公开(公告)日：2008-04-03

申请号：US11823087

申请日：2007-06-26

申请人： Hae Kyun Cheong

发明人： Hae Kyun Cheong

IPC分类号： F15B21/00

CPC分类号： F15B13/0402 ,  G05D16/18 ,  Y10T137/86582 ,  Y10T137/8663 ,  Y10T137/86702

摘要： A pressure control valve for heavy equipment is disclosed, which can smoothly operate a working device having a high load pressure by limiting a supply of hydraulic fluid to a working device having a low load pressure in the case of simultaneously operating a plurality of working devices in a hydraulic circuit in which a plurality of control valves (e.g., a boom control valve and a bucket control valve) are connected in parallel to a single hydraulic pump. The pressure control device includes a valve body, a spool slidably installed in the valve body and shifted to connect an input port to an output port or to disconnect the input port from the output port, and a signal pressure port for applying a signal pressure to a diaphragm of the spool located in a third back chamber formed in the valve body, disconnecting the input port from the output port, and returning the pressure in the output port to the drain port. The spool is shifted, corresponding to the signal pressure applied from an outside to the third back chamber, to control the operating pressure being applied from the input port to the output port.

摘要翻译： 公开了一种用于重型设备的压力控制阀，其可以通过在同时操作多个工作装置的情况下将液压流体供给到具有低负载压力的工作装置来平稳地操作具有高负载压力的工作装置 其中多个控制阀（例如，起重臂控制阀和铲斗控制阀）并联连接到单个液压泵的液压回路。 压力控制装置包括阀体，可滑动地安装在阀体中并且将输入端口连接到输出端口或将输入端口与输出端口断开的阀芯，以及用于将信号压力施加到 位于形成在阀体中的第三后室中的阀芯的隔膜，将输入端口与输出端口断开，并将输出端口中的压力返回到排出口。 阀芯相对于从外部施加到第三后室的信号压力移动，以控制从输入端口到输出端口施加的操作压力。

公开(公告)号：US07017470B2

公开(公告)日：2006-03-28

申请号：US10869403

申请日：2004-06-16

申请人： Hae Kyun Cheong

发明人： Hae Kyun Cheong

IPC分类号： F15B13/04

CPC分类号： F15B13/0402 ,  E02F9/2203 ,  E02F9/2225 ,  E02F9/226 ,  E02F9/2267 ,  E02F9/2271 ,  F15B11/05 ,  F15B2211/30525 ,  F15B2211/31588 ,  F15B2211/35 ,  F15B2211/40584 ,  F15B2211/41527 ,  F15B2211/428 ,  F15B2211/71

摘要： Disclosed is a flow control apparatus for construction heavy equipment capable of maintaining constant set flow rate regardless of changes in load pressure and pump pressure. The flow control apparatus is composed of a control valve, a flow control valve, and a load check valve. The control valve has a parallel passage, a housing provided with a first load passage and a second load passage, and a control spool provided to be movable in the housing. The flow control valve having a logic check valve provided to be openable between the first load passage and the parallel passage, and a logic control valve controlling a flow rate supplied to a back pressure chamber of the logic check valve. The load check valve is provided between the second load passage and the parallel passage to restrict backflow from the second hydraulic cylinder.

摘要翻译： 公开了一种用于施工重型设备的流量控制装置，其能够保持恒定的设定流量，而与负载压力和泵压力的变化无关。 流量控制装置由控制阀，流量控制阀和负载止回阀构成。 控制阀具有平行的通道，设置有第一负载通道和第二负载通道的壳体以及设置成能够在壳体中移动的控制阀芯。 所述流量控制阀具有设置成能够在所述第一负载通路和所述并列通路之间开启的逻辑止回阀，以及逻辑控制阀，其控制供给所述逻辑止回阀的背压室的流量。 负载止回阀设置在第二负载通道和平行通道之间，以限制来自第二液压缸的回流。

公开(公告)号：US08713930B2

公开(公告)日：2014-05-06

申请号：US12980530

申请日：2010-12-29

申请人： Hae Kyun Cheong

发明人： Hae Kyun Cheong

IPC分类号： F16D31/02

CPC分类号： E02F9/2232 ,  E02F9/2285 ,  E02F9/2296 ,  F04B49/08 ,  F15B11/055 ,  F15B2211/20546 ,  F15B2211/3116 ,  F15B2211/625 ,  F15B2211/6355

摘要： A negative control type hydraulic system in which the use of a pilot pump and a load pressure generator between a hydraulic pump and a control valve is not required to prevent a power loss.

摘要翻译： 不需要在液压泵和控制阀之间使用先导泵和负载压力发生器的负控制型液压系统来防止功率损失。

公开(公告)号：US20110158830A1

公开(公告)日：2011-06-30

申请号：US12980530

申请日：2010-12-29

申请人： Hae Kyun CHEONG

发明人： Hae Kyun CHEONG

IPC分类号： F04B49/00

CPC分类号： E02F9/2232 ,  E02F9/2285 ,  E02F9/2296 ,  F04B49/08 ,  F15B11/055 ,  F15B2211/20546 ,  F15B2211/3116 ,  F15B2211/625 ,  F15B2211/6355

摘要： A negative control type hydraulic system is provided, in which the use of a pilot pump and a load pressure generator between a hydraulic pump and a control valve is not required to prevent a power loss. The negative control type hydraulic system includes an engine; at least one variable-displacement hydraulic pump connected to the engine; at least one hydraulic actuator connected to the hydraulic pump; switching valves installed in a center bypass line of the hydraulic pump and shifted, in accordance with the supply of signal pressure from the outside, to control a flow of hydraulic fluid supplied to the hydraulic actuator; pilot signal pressure generators installed on a downstream side of the center bypass line to generate signal pressure for variably controlling a discharge flow rate of the hydraulic pump; a control lever outputting signal pressure in proportion to a manipulation amount; and a pressure reducing valve installed in a pilot line having one end branched and connected to the center bypass line and the other end connected to an input port of the control lever, and controlling hydraulic fluid supplied through the pilot line when the control lever is manipulated so that the hydraulic fluid from the hydraulic pump can be used as the signal pressure according to the manipulation of the control lever.

摘要翻译： 提供一种负控制型液压系统，其中不需要在液压泵和控制阀之间使用先导泵和负载压力发生器来防止功率损失。 负控制型液压系统包括发动机; 连接到发动机的至少一个可变排量液压泵; 连接到液压泵的至少一个液压致动器; 安装在液压泵的中心旁路管路中的切换阀，根据来自外部的信号压力的供给而移动，以控制供给到液压致动器的液压流体的流动; 导向信号压力发生器安装在中心旁路管线的下游侧，以产生用于可变地控制液压泵的排出流量的信号压力; 控制杆，与操作量成比例地输出信号压力; 以及安装在先导管路中的减压阀，其一端分支并连接到中心旁通管线，另一端连接到控制杆的输入端口，并且当操纵控制杆时控制通过先导管线供应的液压流体 使得来自液压泵的液压流体可以用作根据控制杆的操纵的信号压力。

公开(公告)号：US20090094973A1

公开(公告)日：2009-04-16

申请号：US12246515

申请日：2008-10-07

申请人： Hae Kyun CHEONG

发明人： Hae Kyun CHEONG

IPC分类号： F15B13/06

CPC分类号： F15B11/17 ,  E02F9/2228 ,  E02F9/2242 ,  E02F9/2292 ,  E02F9/2296 ,  F15B21/042 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/3116 ,  F15B2211/41509 ,  F15B2211/428 ,  F15B2211/45 ,  F15B2211/50509 ,  F15B2211/575 ,  F15B2211/6343 ,  F15B2211/6355 ,  F15B2211/66 ,  F15B2211/7142

摘要： A hydraulic circuit for heavy equipment is disclosed, which utilizes a hydraulic fluid supplied from a hydraulic pump for driving a cooling fan, as a pilot signal pressure, without installing a separate constant displacement pilot pump for supplying the pilot signal pressure to a control valve for controlling the hydraulic fluid to be supplied to a working device such as a boom. The hydraulic circuit includes first to third hydraulic pumps connected to an engine; a first control valve installed in a flow path of the first hydraulic pump; a second control valve installed in a flow path of the second hydraulic pump; a hydraulic motor connected to the third hydraulic pump; a cooling fan, connected to the hydraulic motor, for discharging cooling wind to an oil cooler; a temperature sensor for detecting a temperature of the hydraulic fluid in the hydraulic tank; an electric relief valve, installed in a drain flow path of the third hydraulic pump, for variably controlling a rotation velocity of the cooling fan; a controller for controlling the hydraulic pressure that drives the hydraulic motor; and a pilot pressure generator, installed in a pilot flow path branched and connected to a flow path of the third hydraulic pump, for supplying a pilot signal pressure to the first and second control valves when shifting.

摘要翻译： 公开了一种用于重型设备的液压回路，其利用从液压泵供应的用于驱动冷却风扇的液压流体作为先导信号压力，而不安装单独的恒定位移先导泵，以将先导信号压力提供给控制阀， 控制要供应到诸如吊杆的工作装置的液压流体。 液压回路包括连接到发动机的第一至第三液压泵; 安装在第一液压泵的流路中的第一控制阀; 安装在所述第二液压泵的流路中的第二控制阀; 连接到第三液压泵的液压马达; 冷却风扇，连接到液压马达，用于将冷却风排放到油冷却器; 温度传感器，用于检测液压缸中的液压流体的温度; 安装在所述第三液压泵的排水流路中的电气安全阀，用于可变地控制所述冷却风扇的转速; 用于控制驱动液压马达的液压的控制器; 以及先导式压力发生器，其安装在分支并连接到第三液压泵的流路的先导流路中，用于当换档时向第一和第二控制阀提供先导信号压力。

公开(公告)号：US07159610B2

公开(公告)日：2007-01-09

申请号：US10860166

申请日：2004-06-03

申请人： Hae Kyun Cheong

发明人： Hae Kyun Cheong

IPC分类号： F16K31/383 ,  F16K17/10

CPC分类号： F16K17/105 ,  Y10T137/7766 ,  Y10T137/777

摘要： Disclosed is a relief valve, in which a flow rate of hydraulic fluid is not greatly changed even when temperature is changed, and thus providing smooth operation and preventing foreign materials contained in the hydraulic fluid from being introduced into the relief valve. The relief valve is comprised of a sleeve provided with a high-pressure inlet and a tank fluid channel; a main poppet provided with an inflow fluid passage and a back pressure chamber; an annular fluid passage provided on a front end of the main poppet; a seat provided with a seat fluid channel communicating with the back pressure chamber; and a pilot poppet communicating the seat fluid channel with the tank fluid channel.

摘要翻译： 公开了一种安全阀，其中液压流体的流量即使在温度变化时也没有大的变化，从而提供平稳的操作并且防止包含在液压流体中的异物被引入溢流阀。 安全阀由设置有高压入口和槽液通道的套筒构成; 设置有流入流路和背压室的主提升阀; 设置在主提升阀前端的环形流体通道; 设置有与所述背压室连通的座流体通道的座椅; 以及将座椅流体通道与储罐流体通道连通的先导提升阀。