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1. 发明公开

EP0618371A3 Hydraulic system 失效
标题翻译： Hydraulikanlage。
公开(公告)号：EP0618371A3
公开(公告)日：1995-03-08
申请号：EP94302142.8
申请日：1994-03-24
申请人： JOHNSTON ENGINEERING LIMITED
发明人： Duthie, Anthony James
IPC分类号： F15B1/06 , F15B13/09
CPC分类号： F15B11/17 , F15B1/26 , F15B2211/20576 , F15B2211/40507 , F15B2211/41554 , F15B2211/61 , F15B2211/615 , F15B2211/71 , F15B2211/885 , Y10T137/86059 , Y10T137/86163
摘要： A hydraulic system 10 provides a positive supply of hydraulic fluid at a controlled pressure to plurality of pumps. The system comprises a fluid reservoir 15 having outlet means to supply fluid to an auxiliary pump 30. A pressure chamber 16 communicates with a reservoir 15 and has outlet means to supply fluid to a plurality of working pumps 11, 12, 13. An inlet manifold 18 is provided for receiving fluid returned from the working and auxiliary pumps.

2. 发明授权

EP0020354B1 MANIFOLDED MULTIPLE HYDRAULIC PUMP STRUCTURE 失效
标题翻译：多功能液压泵结构
公开(公告)号：EP0020354B1
公开(公告)日：1983-07-13
申请号：EP79900879.2
申请日：1978-12-26
申请人： CATERPILLAR TRACTOR CO.
发明人： SHELBY, Robert L. , BEHRENDS, Bertwin E.
IPC分类号： F04C11/00 , F15B13/09
CPC分类号： F04C11/00
摘要： An improved hydraulic pump structure for hydraulic systems which require a plurality of rotary pumps has a pump casing assembly (20) consisting of a plurality of pump casing elements (23-29) which are fastened together in abutting relationship to define a first pump cavity (54) and a second pump cavity (55a) with aligned drive shaft holes (56-61) and a drive shaft (62-63) which is journalled in the holes (56-61) and carries a rotary pump member (76-77 or 80-81) in each cavity (54 and 55a). The casing elements (23-29) are manifolded to provide a first fluid inlet passage (82), a first fluid delivery passage (84) which terminates in a port in a fluid delivery end plate (29), a second fluid inlet passage (86) which has an entrance opening (H6) in the fluid delivery end plate (29), and a second fluid outlet passage (87) which terminates in a port in the fluid delivery end plate (29). There may be two subassemblies (21 and 22) with two pumps in each, secured together in face abutting relationship with an axially interengaged driving connection (62a-63a) between drive shaft segments (62 and 63) in the two subassemblies (21 and 22) and with fluid delivery passages (83 and 84) extending from one assembly through the other.

3. 发明公开

EP0279356A1 Hydraulic system for a construction machine 失效
标题翻译： Hydraulicisches Systemfüreine Erdbewegungsmaschine。
公开(公告)号：EP0279356A1
公开(公告)日：1988-08-24
申请号：EP88102009.3
申请日：1988-02-11
申请人： DEERE & COMPANY
发明人： Johnson, Steven Harold , Williams, Lary Lynn
IPC分类号： E02F3/32 , E02F3/22 , F15B11/16 , F15B13/09
CPC分类号： F15B11/17 , E02F9/2232 , E02F9/2239 , E02F9/2292 , E02F9/2296 , F15B2211/20553 , F15B2211/20576 , F15B2211/30505 , F15B2211/3111 , F15B2211/351 , F15B2211/353 , F15B2211/6313 , F15B2211/65 , F15B2211/6651 , F15B2211/7142 , F15B2211/715 , F15B2211/78
摘要： An excavator has a number of different hydraulically powered functions (28, 32, 36) that are controlled by a closed center hydraulic system which features a pair of variable displacement, engine driven hydraulic pumps (44, 46), the displacement of which is responsive to the demands of the system. The flow to various hydraulic motors (30, 34, 38) for the functions (28, 32, 36) is controlled by pilot operated load sensing control valves (85, 86, 87, 88, 89, 90) which direct fluid pressure to a load sensing line (74) when one of the hydraulic motors in the system is being operated. This load sensing line (74) is connected to controls (48, 50) of the pumps (44, 46) to place the pumps in stroke when a flow of pressurized fluid is required. The flow of the load sensing pressure to the control (48) for one of the pumps (44) can be optionally disconnected by an on/off valve (78) to place this pump (44) in a standby condition and thereby reduce the flow capacity of the hydraulic system at the option of the operator.
摘要翻译：挖掘机具有许多不同的液压动力功能（28,32,36），其由闭合的中央液压系统控制，所述闭合的中央液压系统具有一对可变排量的发动机驱动的液压泵（44,46），其位移响应对系统的要求。用于功能（28,32,36）的各种液压马达（30,34,38）的流量由先导操作的负载感测控制阀（85,86,87,88,89,90）控制，其将流体压力负载感测线（74），当系统中的一个液压马达被操作时。当需要加压流体流时，该负载感测线路（74）连接到泵（44,46）的控制器（48,50），以将泵置于行程中。用于一个泵（44）的控制器（48）的负载感测压力的流动可以可选地通过开/关阀（78）来断开，以使该泵（44）处于待机状态，从而减少流量液压系统的运行能力可选。

4. 发明公开

EP0092315A2 Hydraulic pump control 失效
标题翻译： Hydraulische Pumpensteuerung。
公开(公告)号：EP0092315A2
公开(公告)日：1983-10-26
申请号：EP83301402.0
申请日：1983-03-15
申请人： AUTOMOTIVE PRODUCTS PUBLIC LIMITED COMPANY
发明人： Young, Alastair John , Chettle, Adrian John
IPC分类号： F15B13/09
CPC分类号： F15B11/17 , F15B2211/20584 , F15B2211/25 , F15B2211/30505 , F15B2211/428 , F15B2211/45 , F15B2211/455 , F15B2211/76
摘要： A fluid pressure supply system incorporates two pumping units P1 and P2 for supplying fluid under pressure to a load 13. Pump P1 supplies the load continuously. Pump P2 is also connected to the load 13 through a load valve 15 when pressure in the load is low but is connected to drain through the load valve when load pressure is high. A pressure relief valve 14 controls the load valve 15 by a connection from port 22 to port 28 which applies system pressure to the load valve at low pressure and drain pressure via port 23 at higher pressures in response to relief valve spool movement. The high control pressure moves load valve spool 25 to connect its inlet port 29 to load 13 through port 33. When system pressure is high and control pressure is low, inlet 29 is connected to drain port 31 so that pump P2 is off-load in that it is pumping direct to drain.
摘要翻译：流体压力供应系统包括两个泵送单元P1和P2，用于将压力下的流体供应到负载13.泵P1连续地供应负载。当负载压力低时，泵P2也通过负载阀15连接到负载13，但当负载压力高时，泵P2通过负载阀连接到排水管。减压阀14通过从端口22到端口28的连接来控制负载阀15，该连接器响应于安全阀阀芯移动而在较高压力下通过端口23在低压和排出压力下向负载阀施加系统压力。高控制压力移动负载阀芯25，通过端口33将其入口29连接到负载13.当系统压力高并且控制压力低时，入口29连接到排放口31，使得泵P2处于卸载状态它直接泵送到排水。

5. 发明公开

EP0358778A1 PILOT OPERATED CONTROL VALVE SYSTEM 失效
标题翻译： VORGESTEUERTE VENTILANORDNUNG。
公开(公告)号：EP0358778A1
公开(公告)日：1990-03-21
申请号：EP89902827.8
申请日：1989-02-28
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO
发明人： KARAKAMA, Tadao , ISHIZAKI, Naoki , ODA, Yosuke
IPC分类号： F15B13/09 , F15B13/042 , F15B11/00 , F16K27/00
CPC分类号： F15B13/0842 , F15B13/0807 , F15B13/0892 , F15B13/0896 , F15B2013/006
摘要： A pilot operated valve device having a plurality of valves for controlling the operation of a hydraulic device such as a hydraulic cylinder, wherein the whole device is compactly formed such that a plural- ty of valves are mounted in small mounting space without causing them to be interfered by each other. The valve device is provided with an assist for simultaneous application of pressured oil from two hydraulic pumps through the same hydraulic circuit as required. The device comprises a cuboidal valve housing (10); first and second pump ports (11, 12) extending in parallel and horizontally in upper portions near two opposite sides in the valve housing and communicating with a first hydraulic pump; a tank port (13) extending horizontally through the center in the valve housing and communicating with the drain tank; a pilot tank port (25) and an auxiliary pilot tank port that run over and under the above tank port in parallel therewith and in a horizontal direction in the valve housing; first and second auxiliary pump ports (81, 82) extending in parallel and horizontally in lower portions near two opposite sides in the valve housing and communicating with a second hydraulic pump; a plurality of valves (19, 20, 23, 24. 88. 98) inserted in the valve holes formed in the valve housing to open or close these ports; and a plurality of pilot valves (31, 32, 87,97) for controlling the supply of pressure oil for pilot pressure to these valves.
摘要翻译：一种先导操作阀装置，具有用于控制诸如液压缸的液压装置的操作的多个阀，其中整个装置紧凑地形成，使得多个阀安装在小的安装空间中，而不会使它们受到干扰彼此。该阀装置具有辅助，用于通过相同的液压回路同时施加来自两个液压泵的加压油。该装置包括一个立方体阀壳体（10）; 第一和第二泵口（11,12），其平行且水平地延伸在阀壳体的两个相对侧附近并与第一液压泵连通; 水箱口（13），其水平地延伸穿过所述阀壳体的中心并与所述排水箱连通; 一个先导罐口（25）和一个辅助先导罐口，在上述罐口平行于其上并在阀壳体的水平方向上延伸; 第一和第二辅助泵口（81,82），其在所述阀壳体中的两个相对侧附近在下部平行且水平地延伸并与第二液压泵连通; 插入形成在阀壳体中的阀孔中的多个阀门（19,20,23,24,88,98）以打开或关闭这些端口; 以及多个先导阀（31,32,87,97），用于控制对这些阀的先导压力的压力油的供给。

6. 发明授权

EP0050118B1 CONTROL FOR LOAD SHARING PUMPS 失效
标题翻译：负载共享泵的控制
公开(公告)号：EP0050118B1
公开(公告)日：1985-12-04
申请号：EP81900670.1
申请日：1980-04-07
申请人： CATERPILLAR TRACTOR CO.
发明人： JOHNSON, Howard L.
IPC分类号： F15B11/16 , F15B13/06 , F15B13/09
CPC分类号： F15B11/17 , F15B2211/20576 , F15B2211/30535 , F15B2211/329 , F15B2211/351 , F15B2211/40515 , F15B2211/4053 , F15B2211/428 , F15B2211/45 , F15B2211/6054 , F15B2211/6055 , F15B2211/6057 , F15B2211/6355 , F15B2211/65 , F15B2211/71 , F15B2211/781
摘要： Conditional exchanging of working fluid between plural fluid circuits (13A, 13B) having separate supply pumps (18A, 18B) is provided for without continuously bleeding fluid from the pump control pressure lines (21A, 21B). Each circuit (13A, 13B) has a pump control (19A, 19B) responsive to a control pressure, a plurality of fluid motors (14A, 15A, 16A, 14B, 15B, 16B), and a group of resolver valves (38A, 38B) which compare motor pressures and intercommunicate the pump control (19A, 19B) with the most highly pressurized motor (14A, 15A, 16A, 14B, 15B, 16B). At times when fluid from one circuit (13A, 13B) is being delivered to a motor (16A, 16B) of another circuit (13A, 13B), the pressure comparing function of the resolver group (38A, 38B) of the one circuit (13A, 13B) is extended to include the motor (16A, 16B) of the circuit (13A, 13B). Among other uses, the system (11) may be used on excavator vehicles having plural fluid motors performing a variety of different functions. Absence of a bleed in the pump control lines (21 A, 21B) conserves power and enables precise response of the pumps to demand changes.

7. 发明公开

EP0108347A1 Hydraulic system for a tractor or equivalent 失效
标题翻译： HydrauliksystemfürSchlepper oder dergleichen。
公开(公告)号：EP0108347A1
公开(公告)日：1984-05-16
申请号：EP83110758.6
申请日：1983-10-27
申请人： Valmet Oy
发明人： Mänttäri, Erkki
IPC分类号： A01B63/10 , F15B13/09
CPC分类号： F15B11/17 , A01B63/1013 , E02F9/2239 , E02F9/2292 , F15B2211/20584 , F15B2211/3116 , F15B2211/327 , F15B2211/4053 , F15B2211/40584 , F15B2211/455 , F15B2211/46 , F15B2211/473 , F15B2211/7142 , F15B2211/78
摘要： A hydraulic system for a tractor, comprising hydraulic pumps (3,4) driven by the tractor's engine (M), their intake sides connected over an intake filter (2) to an oil tank (1). The system comprises a valve mechanism (5, 7, 8, 9, 10, 11, 13, 14,15) by mediation of which the hydraulic pumps (3,4) have been connected to the lifting cylinder (12) of the tractor's three-point lifting attachment. The hydraulic system comprises at least two hydraulic pumps (3,4), which have been connected to be in parallel. Of these hydraulic pumps, one is a mini-pump (4) and the other is a bigger main pump (3) with an output several times the output of the mini-pump (4). The output (Q 0 ) of the mini-pump (4) is about 15 to 30% of the output (Q,) of the larger pump (3). The functions controlled by the control automatics (22,23,24) and/or the functions (25) based on lifting attachment manipulation from the rear of the tractor and/or the leakage compensation of the lifting cylinder (12) have been arranged to take place under control by an electric directional valve with two magnets and using exclusively the output of the mini-pump (4). The combined outputs of both pumps (3,4) can through the main governor valve (10) be directed to the lifting cylinder (12) of the tractor's lifting attachment.
摘要翻译：一种用于拖拉机的液压系统，包括由拖拉机发动机（M）驱动的液压泵（3,4），其进气侧通过进气过滤器（2）连接到油箱（1）。该系统包括阀机构（5,7,8,9,10,11,13,14,15），其中液压泵（3,4）已经被连接到拖拉机的提升缸（12）三点提升附件。液压系统包括至少两个液压泵（3,4），它们被并联连接。在这些液压泵中，一个是微型泵（4），另一个是较大的主泵（3），输出量是微型泵（4）的输出数倍。小型泵（4）的输出（Q0）为大型泵（3）的输出（Q1）的约15〜30％。基于来自拖拉机后部的提升附接操作和/或提升缸（12）的泄漏补偿的由控制自动化（22,23,24）和/或功能（25）控制的功能已被布置成由具有两个磁体的电动换向阀控制，并仅使用微型泵（4）的输出。两个泵（3,4）的组合输出可以通过主调节阀（10）被引导到拖拉机提升附件的提升缸（12）。

8. 发明公开

EP0020354A4 MANIFOLDED MULTIPLE HYDRAULIC PUMP STRUCTURE. 失效
标题翻译：多个液压泵结构共同的壳体。
公开(公告)号：EP0020354A4
公开(公告)日：1980-11-14
申请号：EP79900879
申请日：1978-12-26
申请人： CATERPILLAR TRACTOR CO
发明人： SHELBY ROBERT L , BEHRENDS BERTWIN E
IPC分类号： F04C2/08 , F04C11/00 , F16H39/00 , F16H41/24 , F15B13/09 , F16H39/36
CPC分类号： F04C11/00
摘要： An improved hydraulic pump structure for hydraulic systems which require a plurality of rotary pumps has a pump casing assembly (20) consisting of a plurality of pump casing elements (23-29) which are fastened together in abutting relationship to define a first pump cavity (54) and a second pump cavity (55a) with aligned drive shaft holes (56-61) and a drive shaft (62-63) which is journalled in the holes (56-61) and carries a rotary pump member (76-77 or 80-81) in each cavity (54 and 55a). The casing elements (23-29) are manifolded to provide a first fluid inlet passage (82), a first fluid delivery passage (84) which terminates in a port in a fluid delivery end plate (29), a second fluid inlet passage (86) which has an entrance opening (H6) in the fluid delivery end plate (29), and a second fluid outlet passage (87) which terminates in a port in the fluid delivery end plate (29). There may be two subassemblies (21 and 22) with two pumps in each, secured together in face abutting relationship with an axially interengaged driving connection (62a-63a) between drive shaft segments (62 and 63) in the two subassemblies (21 and 22) and with fluid delivery passages (83 and 84) extending from one assembly through the other.

9. 发明公开

EP0618371A2 Hydraulic system 失效
标题翻译： Hydraulikanlage。
公开(公告)号：EP0618371A2
公开(公告)日：1994-10-05
申请号：EP94302142.8
申请日：1994-03-24
申请人： JOHNSTON ENGINEERING LIMITED
发明人： Duthie, Anthony James
IPC分类号： F15B1/06 , F15B13/09
CPC分类号： F15B11/17 , F15B1/26 , F15B2211/20576 , F15B2211/40507 , F15B2211/41554 , F15B2211/61 , F15B2211/615 , F15B2211/71 , F15B2211/885 , Y10T137/86059 , Y10T137/86163
摘要： A hydraulic system 10 provides a positive supply of hydraulic fluid at a controlled pressure to plurality of pumps. The system comprises a fluid reservoir 15 having outlet means to supply fluid to an auxiliary pump 30. A pressure chamber 16 communicates with a reservoir 15 and has outlet means to supply fluid to a plurality of working pumps 11, 12, 13. An inlet manifold 18 is provided for receiving fluid returned from the working and auxiliary pumps.
摘要翻译：液压系统10以受控的压力向多个泵提供液压流体的正向供应。该系统包括具有用于将流体供应到辅助泵30的出口装置的流体储存器15.压力室16与储存器15连通并具有用于将流体供应到多个工作泵11,12,13的出口装置。入口歧管 18用于接收从工作泵和辅助泵返回的流体。

10. 发明授权

EP0358778B1 PILOT OPERATED CONTROL VALVE SYSTEM 失效
标题翻译： PILOT操作控制阀系统
公开(公告)号：EP0358778B1
公开(公告)日：1993-06-09
申请号：EP89902827.8
申请日：1989-02-28
申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO
发明人： KARAKAMA, Tadao , ISHIZAKI, Naoki , ODA, Yosuke
IPC分类号： F15B13/09 , F15B13/042 , F15B11/00 , F16K27/00
CPC分类号： F15B13/0842 , F15B13/0807 , F15B13/0892 , F15B13/0896 , F15B2013/006
摘要： A pilot operated valve device having a plurality of valves for controlling the operation of a hydraulic device such as a hydraulic cylinder, wherein the whole device is compactly formed such that a plurality of valves are mounted in small mounting space without causing them to be interfered by each other. The valve device is provided with an assist for simultaneous application of pressured oil from two hydraulic pumps through the same hydraulic circuit as required. The device comprises a cuboidal valve housing (10); first and second pump ports (11, 12) extending in parallel and horizontally in upper portions near two opposite sides in the valve housing and communicating with a first hydraulic pump; a tank port (13) extending horizontally through the center in the valve housing and communicating with the drain tank; a pilot tank port (25) and an auxiliary pilot tank port that run over and under the above tank port in parallel therewith and in a horizontal direction in the valve housing; first and second auxiliary pump ports (81, 82) extending in parallel and horizontally in lower portions near two opposite sides in the valve housing and communicating with a second hydraulic pump; a plurality of valves (19, 20, 23, 24, 88, 98) inserted in the valve holes formed in the valve housing to open or close these ports; and a plurality of pilot valves (31, 32, 87, 97) for controlling the supply of pressure oil for pilot pressure to these valves.

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