CN104675772B - Load sensitive control hydraulic system - Google Patents
Load sensitive control hydraulic system Download PDFInfo
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- CN104675772B CN104675772B CN201510096281.XA CN201510096281A CN104675772B CN 104675772 B CN104675772 B CN 104675772B CN 201510096281 A CN201510096281 A CN 201510096281A CN 104675772 B CN104675772 B CN 104675772B
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- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention belongs to the field of hydraulic equipment and relates to a load sensitive control hydraulic system. The load sensitive control hydraulic system comprises a load sensitive pump, a load sensitive proportional valve, a hydraulic handle and a hydraulic oil tank, wherein an oil suction opening of the load sensitive pump is connected with the hydraulic oil tank through a filter; a P opening and an LS opening of the load sensitive pump are respectively and correspondingly connected with a P opening and an LS opening of the load sensitive proportional valve; the load sensitive proportional valve is connected with a first motor, a second motor and the hydraulic handle respectively; an oil opening of the hydraulic handle is connected with the hydraulic oil tank; a control oil output end of the load sensitive proportional valve is connected with a connection end of the hydraulic handle by a first pipeline; a throttling valve is arranged on the first pipeline. The product has a simple and reasonable structure; the motors can move under a high load under the condition that the power is not enough in a working process.
Description
Technical field
The invention belongs to field of hydraulic equipment, relate to a kind of Ioad-sensing control hydraulic system.
Background technology
Ioad-sensing control is pressure-independent flow control mode, and current load sensitive system is all execution in the case of power abundance, is extremely difficult to operate at full capacity in the case of being short of power.Fig. 1 shows the topology view of existing Ioad-sensing control hydraulic system, owing to lacking each kind valve body being controlled for loine pressure oil, usually can not reach job requirement.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of simple in construction, Ioad-sensing control hydraulic system ingenious, rational, use this system to realize in the case of being short of power, still can allow motor high capacity action.
nullThe technical scheme provided according to the present invention: a kind of Ioad-sensing control hydraulic system，Including load sensitive pump、Load-sensitive proportioning valve、Hydraulic handle and hydraulic oil container，The inlet port of described load sensitive pump connects hydraulic oil container by filter，The P mouth of load sensitive pump、LS mouth respectively with the P mouth of load-sensitive proportioning valve、The corresponding connection of LS mouth，Described load-sensitive proportioning valve respectively with the first motor、Second motor and hydraulic handle are connected，The oil return opening of hydraulic handle is connected with hydraulic oil container，It is characterized in that: the pilot control oil outfan of described load-sensitive proportioning valve is connected between end with hydraulic handle and is connected by the first pipeline，First pipeline is provided with choke valve，It is connected by the second pipeline between described first pipeline and the LS mouth of load sensitive pump，It is provided with sequence valve on described second pipeline，The P mouth of described sequence valve is connected with the P mouth of hydraulic handle，The control oil end of sequence valve connects the second pipeline，The T mouth of sequence valve is connected with the P mouth of overflow valve，The T mouth of overflow valve is connected with fuel tank.
As a further improvement on the present invention, described load sensitive pump includes main pump, first throttle valve, servo chamber, pressure cut off module, Ioad-sensing control module, described Ioad-sensing control module, pressure cut off module, servo chamber three are connected in parallel with each other, one end, described servo chamber connects main pump, and the other end connects first throttle valve.
As a further improvement on the present invention, described load-sensitive proportioning valve includes electro-hydraulic control guide oil filter, pilot control air relief valve, the first high-pressure overflow valve, the second high-pressure overflow valve, the 3rd high-pressure overflow valve and two groups of operational modules parallel with one another, often organize described operational module and all include a shuttle valve, two pressure limiting valves, a reversal valve and two three position five-way valves, wherein shuttle valve is connected with reversal valve, two pressure limiting valves are connected to described reversal valve two ends, one of them three position five-way valve connects the first motor, and another three position five-way valve connects the second motor；Described electro-hydraulic control guide oil filter, pilot control air relief valve, the 3rd high-pressure overflow valve and the second high-pressure overflow valve are connected in series, first high-pressure overflow valve one end is connected with the 3rd high-pressure overflow valve, and the other end and the second high-pressure overflow valve, pressure limiting valve pipeline between the two are connected.
Compared with prior art, advantage is the present invention: product structure of the present invention is simple, rationally, is capable of in the case of being short of power still allowing motor high capacity action in the course of the work.
Accompanying drawing explanation
Fig. 1 is the schematic diagram in load-sensitive loop in prior art.
Fig. 2 is the schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As in figure 2 it is shown, include load sensitive pump 1, load-sensitive proportioning valve the 2, first motor the 3, second motor 4, hydraulic handle 5, hydraulic oil container 6, sequence valve 7, overflow valve 8, choke valve 9, main pump 10, first throttle valve 11, servo chamber 12, pressure cut off module 13, Ioad-sensing control module 14, electro-hydraulic control guide oil filter 15, pilot control air relief valve 16, shuttle valve 17, three position five-way valve 18, pressure limiting valve 19, second throttle the 20, first high-pressure overflow valve 21, filter the 22, second high-pressure overflow valve 23, reversal valve 24, the 3rd high-pressure overflow valve 25 etc..
nullAs shown in Figure 2，One Ioad-sensing control hydraulic system of the present invention，Including load sensitive pump 1、Load-sensitive proportioning valve 2、Hydraulic handle 5 and hydraulic oil container 6，The inlet port of described load sensitive pump 1 connects hydraulic oil container 6 by filter 22，The P mouth of load sensitive pump 1、LS mouth respectively with the P mouth of load-sensitive proportioning valve 2、The corresponding connection of LS mouth，Described load-sensitive proportioning valve 2 respectively with the first motor 3、Second motor 4 and hydraulic handle 5 are connected，The oil return opening of hydraulic handle 5 is connected with hydraulic oil container 6，The pilot control oil outfan of described load-sensitive proportioning valve 2 is connected between end with hydraulic handle 5 and is connected by the first pipeline，First pipeline is provided with choke valve 9，It is connected by the second pipeline between described first pipeline and the LS mouth of load sensitive pump 1，It is provided with sequence valve 7 on described second pipeline，The P mouth of described sequence valve 7 is connected with the P mouth of hydraulic handle 5，The control oil end of sequence valve 7 connects the second pipeline，The T mouth of sequence valve 7 is connected with the P mouth of overflow valve 8，The T mouth of overflow valve 8 is connected with fuel tank.
Described load sensitive pump 1 includes main pump 10, first throttle valve 11, servo chamber 12, pressure cut off module 13, Ioad-sensing control module 14, described Ioad-sensing control module 14, pressure cut off module 13, servo chamber 12 three are connected in parallel with each other, one end, described servo chamber 12 connects main pump 10, and the other end connects first throttle valve 11.
Described load-sensitive proportioning valve 2 includes electro-hydraulic control guide oil filter 15, pilot control air relief valve 16, first high-pressure overflow valve 21, second high-pressure overflow valve 23, 3rd high-pressure overflow valve 25 and two groups of operational modules parallel with one another, often organize described operational module and all include a shuttle valve 17, two pressure limiting valves 19, one reversal valve 24 and two three position five-way valves 18, wherein shuttle valve 17 is connected with reversal valve 24, two pressure limiting valves 19 are connected to described reversal valve 24 two ends, reversal valve 24 two ends are the most also connected with three position five-way valve 18, one of them three position five-way valve 18 connects the first motor 3, another three position five-way valve connects the second motor 4；Described electro-hydraulic control guide oil filter 15, pilot control air relief valve the 16, the 3rd high-pressure overflow valve 25 and the second high-pressure overflow valve 23 are connected in series, first high-pressure overflow valve 21 one end is connected with the 3rd high-pressure overflow valve 25, and the other end and the second high-pressure overflow valve 23, pressure limiting valve 19 pipeline between the two are connected.
Product of the present invention adds sequence valve, overflow valve, choke valve on the basis of existing apparatus, can be implemented in completely and in the case of being short of power, make hydraulic motor reach the purpose of operation at full load, efficiently solve the problem that in load sensitive system, low-power power drives high power system.
Claims (3)
- null1. an Ioad-sensing control hydraulic system，Including load sensitive pump (1)、Load-sensitive proportioning valve (2)、Hydraulic handle (5) and hydraulic oil container (6)，The inlet port of described load sensitive pump (1) connects hydraulic oil container (6) by filter (22)，The P mouth of load sensitive pump (1)、LS mouth respectively with the P mouth of load-sensitive proportioning valve (2)、The corresponding connection of LS mouth，Described load-sensitive proportioning valve (2) respectively with the first motor (3)、Second motor (4) and hydraulic handle (5) are connected，The oil return opening of hydraulic handle (5) is connected with hydraulic oil container (6)，It is characterized in that: the pilot control oil outfan of described load-sensitive proportioning valve (2) is connected between end with hydraulic handle (5) and is connected by the first pipeline，First pipeline is provided with choke valve (9)，It is connected by the second pipeline between described first pipeline and the LS mouth of load sensitive pump (1)，Sequence valve (7) it is provided with on described second pipeline，The P mouth of described sequence valve (7) is connected with the P mouth of hydraulic handle (5)，The control oil end of sequence valve (7) connects the second pipeline，The T mouth of sequence valve (7) is connected with the P mouth of overflow valve (8)，The T mouth of overflow valve (8) is connected with fuel tank.
- 2. Ioad-sensing control hydraulic system as claimed in claim 1, it is characterized in that: described load sensitive pump (1) includes main pump (10), first throttle valve (11), servo chamber (12), pressure cut off module (13), Ioad-sensing control module (14), described Ioad-sensing control module (14), pressure cut off module (13), servo chamber (12) three are connected in parallel with each other, described servo chamber (12) one end connects main pump (10), and the other end connects first throttle valve (11).
- null3. Ioad-sensing control hydraulic system as claimed in claim 1，It is characterized in that: described load-sensitive proportioning valve (2) includes electro-hydraulic control guide oil filter (15)、Pilot control air relief valve (16)、First high-pressure overflow valve (21)、Second high-pressure overflow valve (23)、3rd high-pressure overflow valve (25) and two groups of operational modules parallel with one another，Often organize described operational module and all include a shuttle valve (17)、Two pressure limiting valves (19)、One reversal valve (24) and two three position five-way valves (18)，Wherein shuttle valve (17) is connected with reversal valve (24)，Two pressure limiting valves (19) are connected to described reversal valve (24) two ends，Reversal valve (24) two ends are the most also connected with three position five-way valve (18)，One of them three position five-way valve (18) connects the first motor (3)，Another three position five-way valve connects the second motor (4)；Described electro-hydraulic control guide oil filter (15), pilot control air relief valve (16), the 3rd high-pressure overflow valve (25) and the second high-pressure overflow valve (23) are connected in series, first high-pressure overflow valve (21) one end is connected with the 3rd high-pressure overflow valve (25), and the other end and the second high-pressure overflow valve (23), pressure limiting valve (19) pipeline between the two are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510096281.XA CN104675772B (en) | 2015-03-04 | 2015-03-04 | Load sensitive control hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510096281.XA CN104675772B (en) | 2015-03-04 | 2015-03-04 | Load sensitive control hydraulic system |
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| CN104675772A CN104675772A (en) | 2015-06-03 |
| CN104675772B true CN104675772B (en) | 2017-01-11 |
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| CN201510096281.XA Active CN104675772B (en) | 2015-03-04 | 2015-03-04 | Load sensitive control hydraulic system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716486A (en) * | 2018-08-03 | 2018-10-30 | 中船绿洲镇江船舶辅机有限公司 | Hydraulic power distribution system for double windlass |
| CN109268332B (en) * | 2018-11-15 | 2020-06-09 | 广西柳工机械股份有限公司 | High-low pressure unloading valve and hydraulic system of loader |
| CN109538556B (en) * | 2018-12-10 | 2020-03-03 | 中联重科股份有限公司 | System for controlling double-pump confluence and engineering machinery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210580A (en) * | 2007-12-21 | 2008-07-02 | 沈阳矿山机械（集团）有限责任公司 | Star-wheel synchronization hydraulic system for tunneling machine |
| CN101709623A (en) * | 2009-12-02 | 2010-05-19 | 煤炭科学研究总院西安研究院 | Integral coal mine drilling machine hydraulic system capable of satisfying multiple drilling modes |
| CN102409715A (en) * | 2010-09-21 | 2012-04-11 | 株式会社久保田 | Hydraulic system for working machine |
| CN102747949A (en) * | 2012-07-19 | 2012-10-24 | 山河智能装备股份有限公司 | Fast propulsion hydraulic control loop of down-the-hole drill rig |
| CN204533014U (en) * | 2015-03-04 | 2015-08-05 | 无锡市钻通工程机械有限公司 | Ioad-sensing control hydraulic system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5758737A (en) * | 1980-09-24 | 1982-04-08 | Daikin Ind Ltd | Construction machinery such as power shovel |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210580A (en) * | 2007-12-21 | 2008-07-02 | 沈阳矿山机械（集团）有限责任公司 | Star-wheel synchronization hydraulic system for tunneling machine |
| CN101709623A (en) * | 2009-12-02 | 2010-05-19 | 煤炭科学研究总院西安研究院 | Integral coal mine drilling machine hydraulic system capable of satisfying multiple drilling modes |
| CN102409715A (en) * | 2010-09-21 | 2012-04-11 | 株式会社久保田 | Hydraulic system for working machine |
| CN102747949A (en) * | 2012-07-19 | 2012-10-24 | 山河智能装备股份有限公司 | Fast propulsion hydraulic control loop of down-the-hole drill rig |
| CN204533014U (en) * | 2015-03-04 | 2015-08-05 | 无锡市钻通工程机械有限公司 | Ioad-sensing control hydraulic system |
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| CN104675772A (en) | 2015-06-03 |
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Denomination of invention: Load sensitive control hydraulic system Effective date of registration: 20220701 Granted publication date: 20170111 Pledgee: The Bank of Jiangsu Limited by Share Ltd. Wuxi Helie branch Pledgor: WUXI DRILLTO TRENCHLESS Co.,Ltd. Registration number: Y2022320010322 |