CN104675772A - Load sensitive control hydraulic system - Google Patents
Load sensitive control hydraulic system Download PDFInfo
- Publication number
- CN104675772A CN104675772A CN201510096281.XA CN201510096281A CN104675772A CN 104675772 A CN104675772 A CN 104675772A CN 201510096281 A CN201510096281 A CN 201510096281A CN 104675772 A CN104675772 A CN 104675772A
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- Prior art keywords
- valve
- hydraulic
- mouth
- load
- pipeline
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Classifications
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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 technique
Ioad-sensing control is pressure-independent flow control mode, and current load sensitive system is all the execution when power abundance, is difficult to reach operate at full capacity when being short of power.The topology view of existing Ioad-sensing control hydraulic system is shown in Fig. 1, owing to lacking for the oily each kind valve body carrying out controlling of loine pressure, usually can not have reached job requirement.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of structure simple, ingenious, rational Ioad-sensing control hydraulic system, using this system to realize when being short of power, still can allow motor high capacity action.
According to technological scheme provided by the invention: a kind of Ioad-sensing control hydraulic system, comprise load sensitive pump, load-sensitive Proportional 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 Proportional valve, the corresponding connection of LS mouth, described load-sensitive Proportional valve respectively with the first motor, second motor and hydraulic handle are connected, the return opening of hydraulic handle is connected with hydraulic oil container, it is characterized in that: the pilot control oil output terminal of described load-sensitive Proportional valve is connected by the first pipeline with between hydraulic handle connecting end, first pipeline is provided with throttle valve, be connected by the second pipeline between described first pipeline and the LS mouth of load sensitive pump, described second pipeline is provided with sequence valve, the P mouth of described sequence valve is connected with the P mouth of hydraulic handle, control oil end connection second pipeline of sequence valve, the T mouth of sequence valve is connected with the P mouth of relief valve, the T mouth of relief valve is connected with fuel tank.
As a further improvement on the present invention, described load sensitive pump comprises 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 connection parallel with one another, 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 Proportional valve comprises electric hydraulic control guide oil filter, pilot control reduction valve, the first high-pressure overflow valve, the second high-pressure overflow valve, third high pressurized overflow valve and two groups of operational modules parallel with one another, often organize described operational module and include a shuttle valve, two pressure-limit valves, a selector valve and two three position five-way valves, wherein shuttle valve is connected with selector valve, two pressure-limit valves are connected to described selector 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 electric hydraulic control guide oil filter, pilot control reduction valve, third high pressurized overflow valve and the second high-pressure overflow valve are connected in series, first high-pressure overflow valve one end is connected with third high pressurized overflow valve, and the other end is connected with the second high-pressure overflow valve, pressure-limit valve pipeline between the two.
Compared with prior art, advantage is in the present invention: product structure of the present invention is simple, reasonable, can realize still allowing when being short of power 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 schematic diagram of the present invention.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Figure 2, load sensitive pump 1, load-sensitive Proportional valve 2, first motor 3, second motor 4, hydraulic handle 5, hydraulic oil container 6, sequence valve 7, relief valve 8, throttle valve 9, main pump 10, first throttle valve 11, servo chamber 12, pressure cut off module 13, Ioad-sensing control module 14, electric hydraulic control guide oil filter 15, pilot control reduction valve 16, shuttle valve 17, three position five-way valve 18, pressure-limit valve 19, second throttle 20, first high-pressure overflow valve 21, filter 22, second high-pressure overflow valve 23, selector valve 24, third high pressurized overflow valve 25 etc. are comprised.
As shown in Figure 2, a kind of Ioad-sensing control hydraulic system of the present invention, comprise load sensitive pump 1, load-sensitive Proportional 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 Proportional valve 2, the corresponding connection of LS mouth, described load-sensitive Proportional valve 2 respectively with the first motor 3, second motor 4 and hydraulic handle 5 are connected, the return opening of hydraulic handle 5 is connected with hydraulic oil container 6, the pilot control oil output terminal of described load-sensitive Proportional valve 2 is connected by the first pipeline 23 with between hydraulic handle 5 connecting end, first pipeline 23 is provided with throttle valve 9, be connected by the second pipeline 24 between described first pipeline 23 and the LS mouth of load sensitive pump 1, described second pipeline 24 is provided with sequence valve 7, the P mouth of described sequence valve 7 is connected with the P mouth of hydraulic handle 5, control oil end connection second pipeline 24 of sequence valve 7, the T mouth of sequence valve 7 is connected with the P mouth of relief valve 8, the T mouth of relief valve 8 is connected with fuel tank.
Described load sensitive pump 1 comprises 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 connection parallel with one another, one end, described servo chamber 12 connects main pump 10, and the other end connects first throttle valve 11.
Described load-sensitive Proportional valve 2 comprises electric hydraulic control guide oil filter 15, pilot control reduction valve 16, first high-pressure overflow valve 21, second high-pressure overflow valve 23, third high pressurized overflow valve 25 and two groups of operational modules parallel with one another, often organize described operational module and include a shuttle valve 17, two pressure-limit valves 19, a selector valve 24 and two three position five-way valves 18, wherein shuttle valve 17 is connected with selector valve 24, two pressure-limit valves 19 are connected to described selector valve 24 two ends, selector valve 24 two ends are also connected with three position five-way valve 18 simultaneously, 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 electric hydraulic control guide oil filter 15, pilot control reduction valve 16, third high pressurized 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 third high pressurized overflow valve 25, and the other end is connected with the second high-pressure overflow valve 23, pressure-limit valve 19 pipeline between the two.
Product of the present invention adds sequence valve, relief valve, throttle valve on existing apparatus basis, can be implemented in completely when being short of power makes oil hydraulic motor reach the object of operation at full load, efficiently solves low-power power in load sensitive system and drives the problem of high power system.
Claims (3)
1. an Ioad-sensing control hydraulic system, comprise load sensitive pump (1), load-sensitive Proportional 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 Proportional valve (2), the corresponding connection of LS mouth, described load-sensitive Proportional valve (2) respectively with the first motor (3), second motor (4) and hydraulic handle (5) are connected, the return opening of hydraulic handle (5) is connected with hydraulic oil container (6), it is characterized in that: the pilot control oil output terminal of described load-sensitive Proportional valve (2) is connected by the first pipeline (23) with between hydraulic handle (5) connecting end, first pipeline (23) is provided with throttle valve (9), be connected by the second pipeline (24) between described first pipeline (23) and the LS mouth of load sensitive pump (1), described second pipeline (24) is provided with sequence valve (7), the P mouth of described sequence valve (7) is connected with the P mouth of hydraulic handle (5), control oil end connection second pipeline (24) of sequence valve (7), the T mouth of sequence valve (7) is connected with the P mouth of relief valve (8), the T mouth of relief 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) comprises 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 connection parallel with one another, described servo chamber (12) one end connects main pump (10), and the other end connects first throttle valve (11).
3. Ioad-sensing control hydraulic system as claimed in claim 1, it is characterized in that: described load-sensitive Proportional valve (2) comprises electric hydraulic control guide oil filter (15), pilot control reduction valve (16), first high-pressure overflow valve (21), second high-pressure overflow valve (23), third high pressurized overflow valve (25) and two groups of operational modules parallel with one another, often organize described operational module and include a shuttle valve (17), two pressure-limit valves (19), a selector valve (24) and two three position five-way valves (18), wherein shuttle valve (17) is connected with selector valve (24), two pressure-limit valves (19) are connected to described selector valve (24) two ends, selector valve (24) two ends are also connected with three position five-way valve (18) simultaneously, 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 electric hydraulic control guide oil filter (15), pilot control reduction valve (16), third high pressurized 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 third high pressurized overflow valve (25), and the other end is connected with the second high-pressure overflow valve (23), pressure-limit valve (19) pipeline between the two.
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN104675772A true CN104675772A (en) | 2015-06-03 |
| CN104675772B CN104675772B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510096281.XA Active CN104675772B (en) | 2015-03-04 | 2015-03-04 | Load sensitive control hydraulic system |
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Cited By (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 |
| CN109268332A (en) * | 2018-11-15 | 2019-01-25 | 广西柳工机械股份有限公司 | High-low pressure unloading valve and loader hydraulic system |
| CN109538556A (en) * | 2018-12-10 | 2019-03-29 | 中联重科股份有限公司 | For controlling the system and engineering machinery of Dual-pump flow-converging |
Citations (6)
| 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 |
| 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 |
-
2015
- 2015-03-04 CN CN201510096281.XA patent/CN104675772B/en active Active
Patent Citations (6)
| 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 |
| 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 |
Cited By (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 |
| CN109268332A (en) * | 2018-11-15 | 2019-01-25 | 广西柳工机械股份有限公司 | High-low pressure unloading valve and loader hydraulic system |
| CN109538556A (en) * | 2018-12-10 | 2019-03-29 | 中联重科股份有限公司 | For controlling the system and engineering machinery of Dual-pump flow-converging |
Also Published As
| Publication number | Publication date |
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| CN104675772B (en) | 2017-01-11 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
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 |
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