CN108661967A - A kind of load sensitive control system - Google Patents
A kind of load sensitive control system Download PDFInfo
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- CN108661967A CN108661967A CN201810692257.6A CN201810692257A CN108661967A CN 108661967 A CN108661967 A CN 108661967A CN 201810692257 A CN201810692257 A CN 201810692257A CN 108661967 A CN108661967 A CN 108661967A
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- 239000003921 oil Substances 0.000 claims abstract description 116
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims 1
- 230000001953 sensory effect Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- F15B13/16—Special measures for feedback, e.g. by a follow-up device
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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 technical field of hydraulic equipment, it is related to a kind of load sensitive control system, including electric proportional variable pump, close core load-sensitive proportional multi-way valve and hydraulic oil container, it is characterized in that, S mouthfuls of the inlet port of the electricity proportional variable pump is connected with hydraulic oil container, B mouthfuls of oil outlet is connected with the P mouths for closing core load-sensitive proportional multi-way valve, the LS mouths for closing core load sensing multi-way valve, M mouthfuls be connected separately with first pressure sensor, second pressure sensor, the R mouths for closing core load-sensitive proportional multi-way valve, T mouthfuls be connected with hydraulic oil container；The system is not only energy saving, while solving the problems, such as conventional load sensory system low-response in long pipe runs application, further obviates interference of the line loss to output flow, improves the stability of system.
Description
Technical field
The present invention relates to a kind of load sensitive control system, the load sensitive system being applied in hydraulic test long pipe runs,
Belong to technical field of hydraulic equipment.
Background technology
There is load sensitive control system in hydraulic test long pipe runs, corresponding action completed for controlling hydraulic test,
Currently, there are mainly two types of control structures for load sensitive control system：The first：Constant displacement pump 6+ opens core load-sensitive proportional multi-way valve
7（Fig. 4）；Second：Load sensitive pump 8+ closes core load-sensitive proportional multi-way valve 3（Fig. 5）；
The first, due to the use of be constant displacement pump, so power loss is very big, cause energy waste, especially high-pressure low-flow
When work；Second, due to using variable pump, although energy consumption has obtained good solution, in long pipe runs application
In, due to the influence of the ends LS feedback pressure and working connection transmission speed, cause the response speed of entire control system very slow, and
The pressure loss of pipeline has the influence that can not be ignored to the output flow of valve.
Invention content
It is an object of the present invention to overcome the shortcomings of the prior art and provide a kind of load sensitive control systems, should
System is not only energy saving, while solving the problems, such as conventional load sensory system low-response in long pipe runs application, further eliminates
Interference of the line loss to output flow.
To realize the above technical purpose, the technical scheme is that：A kind of load sensitive control system, including electric ratio
Variable pump closes core load-sensitive proportional multi-way valve and hydraulic oil container, which is characterized in that the inlet port S of the electricity proportional variable pump
Mouth is connected with hydraulic oil container, and B mouthfuls of oil outlet is connected with the P mouths for closing core load-sensitive proportional multi-way valve, described to close core load-sensitive
The LS mouths of multi-way valve, M mouthfuls be connected separately with first pressure sensor, second pressure sensor, it is described to close core load-sensitive ratio
The R mouths of multi-way valve, T mouthfuls be connected with hydraulic oil container.
Further, the electric proportional variable pump includes main pump, third shuttle valve, power limitation control module, pressure cut off control
Molding block, electric proportional control module, feedback linkage, the first servoBcylinder, booster pump and the second servoBcylinder, the oil suction of the booster pump
Mouth is S mouthfuls of the inlet port of electric proportional variable pump, and oil outlet is connected with the oil inlet of main pump, and the oil outlet of the main pump is electric ratio
B mouthfuls of the oil outlet of variable pump, the third shuttle valve are connected with E mouthfuls of main pump oil outlet and guide's hydraulic fluid port respectively, oil outlet difference
With the right chamber of the first servoBcylinder, the oil inlet of power limitation control module, the oil inlet of pressure cut off control module and control mouth, electricity
The oil inlet of ratio control module is connected, and the oil return opening of the electric proportional control module is connected with shell, and oil outlet is cut with pressure
The oil return opening of disconnected module is connected, and the oil outlet of pressure cut off module is connected with the oil return opening of power limitation control module, invariable power control
The oil outlet of molding block is connected with the right chamber of the second servoBcylinder；The feedback linkage is three end links, intermediate ends and electric ratio control
The spring terminal of molding block connects, and upper end is connect with power limitation control module, and lower end is connect with the first servoBcylinder.
Further, it is described close core load-sensitive proportional multi-way valve include restriction, three-way pressure compensating device, overflow valve,
Filter, three-way pressure reducing valve, the first main valve plug, the first two-way pressure compensator, the second main valve plug, the second two-way pressure compensation
Device, the first shuttle valve and the second shuttle valve, the P mouths for closing core load-sensitive proportional multi-way valve respectively with the entrance of restriction, threeway
The oil inlet of pressure compensator and control port, the oil inlet of filter, the pressure compensated oil inlet of the first two-way and the two or two
The oil inlet of logical pressure compensator is connected, the oil outlet of the restriction respectively with the spring terminal of three-way pressure compensating device and overflow
The oil inlet of valve is connected, and the oil return opening of the overflow valve is connected with the R mouths for closing core load-sensitive proportional multi-way valve, the filter
Oil outlet be connected with the oil inlet of three-way pressure reducing valve, the oil outlet control with the first main valve plug respectively of the three-way pressure reducing valve
End, the control terminal of the second main valve plug are connected, the drain tap of the three-way pressure reducing valve and the R for closing core load-sensitive proportional multi-way valve
Mouth is connected, and the oil outlet of the first two-way pressure compensator is connected with the oil inlet of the first main valve plug, first main valve plug
Feedback port be connected respectively with the oil inlet end of the spring terminal of the first two-way pressure compensator, the second shuttle valve, the first main valve plug return
Hydraulic fluid port is connected with the R mouths for closing core load-sensitive proportional multi-way valve, the oil outlet of the second two-way pressure compensator and the second master
The oil inlet of spool is connected, the feedback port of second main valve plug respectively with the spring terminal of the second two-way pressure compensator, first
It is connected described in the oil inlet end of shuttle valve, the oil return opening of the second main valve plug is connected with the R mouths for closing core load-sensitive proportional multi-way valve, described
First shuttle valve is connected with the oil inlet of the T mouths and the second shuttle valve that close core load-sensitive proportional multi-way valve respectively, second shuttle valve
Oil outlet be to close the LS mouths of core load-sensitive proportional multi-way valve.
Compared with existing load sensitive control system, the present invention has the following advantages：
1）The configuration of the present invention is simple, rationally, solved while energy saving using the load sensitive control system conventional load sensitivity
System the problem of low-response, and eliminates interference of the line loss to output flow in long pipe runs application；
2）Present system is initially in high pressure armed state, substantially increases the response speed of system, and it is quick to be then in load
Feel operating mode, on-demand fuel feeding reduces energy consumption；
3）The P mouths for closing core load-sensitive proportional multi-way valve and the LS mouthfuls of pressure differences of present system are kept constant so that the pressure of valve port
Drop is kept constant, and therefore, will not be influenced by the pressure drop of feedback oil circuit and working connection, substantially increase the stability of system.
Description of the drawings
Fig. 1 is existing load sensitive control system（Constant displacement pump+open core load-sensitive proportional multi-way valve）.
Fig. 2 is existing load sensitive control system（Load sensitive pump+close core load-sensitive proportional multi-way valve）.
Fig. 3 is the principle of the present invention figure.
Fig. 4 is the electric ratio of the present invention just variable pump inside schematic diagram.
Fig. 5 is that the present invention closes schematic diagram inside core load-sensitive proportional multi-way valve.
Reference sign：1- electricity proportional variable pump, 2- first pressure sensors, 3- close core load-sensitive proportional multi-path
Valve, 4- second pressures sensor, 5- hydraulic oil containers, 6- constant displacement pumps, 7- open core load-sensitive proportional multi-way valve, 8- load-sensitives
Pump, 9- main pumps, 10- thirds shuttle valve, 11- power limitation controls module, 12- pressure cut offs control module, 13- electric proportional control moulds
Block, 14- feedback linkages, the first servoBcylinders of 15-, 16- booster pumps, the second servoBcylinders of 17-, 18- restrictions, 19- three-way pressures are mended
Repay device, 20- overflow valves, 21- filters, 22- three-way pressure reducing valves, the first main valve plugs of 23-, the first two-ways of 24- pressure compensator,
The second main valve plugs of 25-, the second two-ways of 26- pressure compensator, the second shuttle valve of the first shuttle valves of 27- and 28-.
Specific implementation mode
With reference to specific drawings and examples, the invention will be further described.
As shown in Figure 1, a kind of load sensitive control system, including electric proportional variable pump 1, close core load-sensitive proportional multi-path
S mouthfuls of the inlet port of valve 3 and hydraulic oil container 5, the electricity proportional variable pump 1 is connected with hydraulic oil container 5, and B mouthfuls of oil outlet is born with core is closed
P mouths for carrying sensitive ratio multi-way valve 3 is connected, the LS mouths for closing core load sensing multi-way valve 3, M mouthfuls be connected separately with the first pressure
Force snesor 2, second pressure sensor 4, the R mouths for closing core load-sensitive proportional multi-way valve 3, T mouthfuls with 5 phase of hydraulic oil container
Even.
As shown in Fig. 2, electric proportional variable pump 1 includes main pump 9, third shuttle valve 10, power limitation control module 11, pressure cut off
Control module 12, electric proportional control module 13, feedback linkage 14, the first servoBcylinder 15, booster pump 16 and the second servoBcylinder 17, institute
The inlet port for stating booster pump 16 is S mouthfuls of the inlet port of electric proportional variable pump 1, and oil outlet is connected with the oil inlet of main pump 9, the master
The oil outlet of pump 9 is B mouthfuls of the oil outlet of electric proportional variable pump, the third shuttle valve 10 respectively with 9 oil outlet of main pump and guide
E mouthfuls of hydraulic fluid port is connected, oil outlet oil inlet, the pressure cut off with the right chamber of the first servoBcylinder 15, power limitation control module 11 respectively
The oil inlet of control module 12 is connected with the oil inlet of control mouth, electric proportional control module 13, the electric proportional control module 13
Oil return opening be connected with shell, oil outlet is connected with the oil return opening of pressure cut off module 12, the oil outlet of pressure cut off module 12
It is connected with the oil return opening of power limitation control module 11, the right chamber phase of the oil outlet of power limitation control module 11 and the second servoBcylinder 17
Even；The feedback linkage 14 is three end links, and intermediate ends are L-type, are connect with the spring terminal of electric proportional control module 13, and upper end is logical
It crosses bending rocking bar to connect with power limitation control module 11, lower end is connect with the first servoBcylinder 15；
The model D1P-193-R-A-TPE2 that electric proportional variable pump 1 is selected in the present embodiment.
As shown in figure 3, it includes restriction 18, three-way pressure compensating device 19, overflow valve to close core load-sensitive proportional multi-way valve 3
20, filter 21, three-way pressure reducing valve 22, the first main valve plug 23, the first two-way pressure compensator 24, the second main valve plug 25, second
Two-way pressure compensator 26, the first shuttle valve 27 and the second shuttle valve 28, the P mouths for closing core load-sensitive proportional multi-way valve 3 are respectively
With the entrance of restriction 18, the oil inlet of three-way pressure compensating device 19 and control port, the oil inlet of filter 21, the first two-way
The oil inlet of the oil inlet of pressure compensation 24 and the second two-way pressure compensator 26 is connected, the oil outlet difference of the restriction 18
It is connected with the oil inlet of the spring terminal of three-way pressure compensating device 19 and overflow valve 20, the oil return opening of the overflow valve 20 is born with core is closed
The R mouths for carrying sensitive ratio multi-way valve 3 are connected, and the oil outlet of the filter 21 is connected with the oil inlet of three-way pressure reducing valve 22, institute
The oil outlet for stating three-way pressure reducing valve 22 is connected with the control terminal of the control terminal of the first main valve plug 23, the second main valve plug 25 respectively, institute
The drain tap for stating three-way pressure reducing valve 22 is connected with the R mouths for closing core load-sensitive proportional multi-way valve 3, the first two-way pressure compensation
The oil outlet of device 24 is connected with the oil inlet of the first main valve plug 23, the feedback port of first main valve plug 23 respectively with the first two-way
The spring terminal of pressure compensator 24, the second shuttle valve 28 oil inlet end be connected, the oil return opening of the first main valve plug 23 and close core load it is quick
The R mouths for feeling proportional multi-way valve 3 are connected, the oil inlet of the oil outlet and the second main valve plug 25 of the second two-way pressure compensator 26
Be connected, the feedback port of second main valve plug 25 respectively with the spring terminal of the second two-way pressure compensator 26, the first shuttle valve 27
It is connected described in oil inlet end, the oil return opening of the second main valve plug 25 is connected with the R mouths for closing core load-sensitive proportional multi-way valve 3, and described the
One shuttle valve 27 is connected with the oil inlet of the T mouths and the second shuttle valve 28 that close core load-sensitive proportional multi-way valve 3 respectively, second shuttle
The oil outlet of valve 28 is the LS mouths for closing core load-sensitive proportional multi-way valve 3.
The operation principle of the present invention is that present invention electricity proportional variable pump 1 is connect with PLC controller, PLC controller control electricity
The working condition of proportional variable pump 1, close A mouthfuls of the oil outlet of core load-sensitive proportional multi-way valve 3, B mouthfuls connect with executing agency,
One pressure sensor 2, second pressure sensor 4 are connect with PLC controller signal, are used for the pressure signal of receiving sensor,
And analysis is compared to the two pressure signal；
Initially, the first main valve plug 23 of core load sensing multi-way valve 3, the second main valve plug 25 are closed all in middle position, LS mouthfuls of pressure are
0, the P mouth pressure for closing core load-sensitive proportional multi-way valve 3 acts on second pressure sensor 4 always, generates pressure signal, concurrently
PLC controller is given, at this point, PLC controller exports low current, so that the main pump 9 of electric proportional variable pump is in 20MPa high pressures and awaits orders
State（Constant pressure operating mode）, after the first main valve plug 23 acts（In upper or the next）, pressure oil by the first main valve plug 23 and
First shuttle valve 24 acts on first pressure sensor 2, generates pressure signal, and be sent to PLC controller, then pressure oil passes through
Oil outlet A goes to rapidly executing agency, greatly improves the response speed of the system, and PLC controller passes through to first sensor 2
And the pressure signal of second sensor 4 compares and analyzes, and adjusts the input current of electric proportional variable pump 1, makes load-sensitive ratio
The P mouths and the LS mouthfuls of pressure differences kept constant of example multi-way valve 3, that is, realize the function of load sensitive system；Second main valve of the invention
Core 25 acts or the principle of the first main valve plug 23, the second action simultaneously of main valve plug 25 is identical as above-mentioned Principles of Regulation, herein no longer
It repeats.
The configuration of the present invention is simple, rationally, it is quick to solve conventional load while energy saving using the load sensitive control system
Sensing system the problem of low-response, and eliminates interference of the line loss to output flow in long pipe runs application；System is initial
In high pressure armed state, the response speed of system is substantially increased, is then in load-sensitive operating mode, on-demand fuel feeding is reduced
Energy consumption；The P mouths for closing core load-sensitive proportional multi-way valve and the LS mouthfuls of pressure differences of system are kept constant so that the pressure drop of valve port is kept
It is constant, therefore, it will not be influenced by the pressure drop of feedback oil circuit and working connection, substantially increase the stability of system.
The present invention and its embodiments have been described above, description is not limiting, shown in attached drawing also only
It is one of embodiments of the present invention, practical structures are not limited thereto.All in all if those skilled in the art
It is enlightened by it, without departing from the spirit of the invention, is not inventively designed similar with the technical solution
Frame mode and embodiment, are within the scope of protection of the invention.
Claims (3)
1. a kind of load sensitive control system, including electric proportional variable pump（1）, close core load-sensitive proportional multi-way valve（3）And liquid
Pressure oil case（5）, which is characterized in that the electricity proportional variable pump（1）S mouthfuls of inlet port and hydraulic oil container（5）It is connected, oil outlet B
Mouthful with close core load-sensitive proportional multi-way valve（3）P mouths be connected, it is described to close core load sensing multi-way valve（3）LS mouths, M mouthfuls points
First pressure sensor is not connected with it（2）, second pressure sensor（4）, described to close core load-sensitive proportional multi-way valve（3）R
Mouthful, T mouthfuls and hydraulic oil container（5）It is connected.
2. a kind of load sensitive control system as described in claim 1, it is characterized in that：The electricity proportional variable pump（1）Including master
Pump（9）, third shuttle valve（10）, power limitation control module（11）, pressure cut off control module（12）, electric proportional control module
（13）, feedback linkage（14）, the first servoBcylinder（15）, booster pump（16）And second servoBcylinder（17）, the booster pump（16）'s
Inlet port is electric proportional variable pump（1）S mouthfuls of inlet port, oil outlet and main pump（9）Oil inlet be connected, the main pump（9）'s
Oil outlet is B mouthfuls of the oil outlet of electric proportional variable pump, the third shuttle valve（10）Respectively with main pump（9）Oil outlet and guide oil
Mouthfuls E mouthful are connected, oil outlet respectively with the first servoBcylinder（15）Right chamber, power limitation control module（11）Oil inlet, pressure cuts
Disconnected control module（12）Oil inlet and control mouth, electric proportional control module（13）Oil inlet be connected, the electric proportional control
Module（13）Oil return opening be connected with shell, oil outlet and pressure cut off module（12）Oil return opening be connected, pressure cut off module
（12）Oil outlet and power limitation control module（11）Oil return opening be connected, power limitation control module（11）Oil outlet and second
ServoBcylinder（17）Right chamber be connected；The feedback linkage（14）For three end links, intermediate ends and electric proportional control module（13）'s
Spring terminal connects, upper end and power limitation control module（11）Connection, lower end and the first servoBcylinder（15）Connection.
3. a kind of load sensitive control system as described in claim 1, it is characterized in that：It is described to close core load-sensitive proportional multi-way valve
（3）Including restriction（18）, three-way pressure compensating device（19）, overflow valve（20）, filter（21）, three-way pressure reducing valve（22）,
One main valve plug（23）, the first two-way pressure compensator（24）, the second main valve plug（25）, the second two-way pressure compensator（26）,
One shuttle valve（27）And second shuttle valve（28）, described to close core load-sensitive proportional multi-way valve（3）P mouths respectively with restriction（18）
Entrance, three-way pressure compensating device（19）Oil inlet and control port, filter（21）Oil inlet, the first two-way pressure mend
It repays（24）Oil inlet and the second two-way pressure compensator（26）Oil inlet be connected, the restriction（18）Oil outlet difference
With three-way pressure compensating device（19）Spring terminal and overflow valve（20）Oil inlet be connected, the overflow valve（20）Oil return opening with
Close core load-sensitive proportional multi-way valve（3）R mouths be connected, the filter（21）Oil outlet and three-way pressure reducing valve（22）Into
Hydraulic fluid port is connected, the three-way pressure reducing valve（22）Oil outlet respectively with the first main valve plug（23）Control terminal, the second main valve plug
（25）Control terminal be connected, the three-way pressure reducing valve（22）Drain tap and close core load-sensitive proportional multi-way valve（3）R mouths
It is connected, the first two-way pressure compensator（24）Oil outlet and the first main valve plug（23）Oil inlet be connected, described first
Main valve plug（23）Feedback port respectively with the first two-way pressure compensator（24）Spring terminal, the second shuttle valve（28）Oil inlet end phase
Even, the first main valve plug（23）Oil return opening and close core load-sensitive proportional multi-way valve（3）R mouths be connected, the second two-way pressure
Force compensating device（26）Oil outlet and the second main valve plug（25）Oil inlet be connected, second main valve plug（25）Feedback port point
Not with the second two-way pressure compensator（26）Spring terminal, the first shuttle valve（27）Oil inlet end described in be connected, the second main valve plug
（25）Oil return opening and close core load-sensitive proportional multi-way valve（3）R mouths be connected, first shuttle valve（27）Respectively with to close core negative
Carry sensitive ratio multi-way valve（3）T mouths and the second shuttle valve（28）Oil inlet be connected, second shuttle valve（28）Oil outlet be
Close core load-sensitive proportional multi-way valve（3）LS mouths.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810692257.6A CN108661967A (en) | 2018-06-29 | 2018-06-29 | A kind of load sensitive control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810692257.6A CN108661967A (en) | 2018-06-29 | 2018-06-29 | A kind of load sensitive control system |
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ID=63773199
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058210A (en) * | 2018-10-26 | 2018-12-21 | 圣邦集团有限公司 | A kind of valve post-compensation system that pressure difference is constant |
| CN109973444A (en) * | 2019-04-30 | 2019-07-05 | 天津捷强动力装备股份有限公司 | A kind of hydraulic system controlling hydraulic motor zero load stabilized (steady-state) speed |
| CN112324728A (en) * | 2020-10-10 | 2021-02-05 | 湖南星邦智能装备股份有限公司 | Hydraulic system capable of preventing high temperature |
| CN113107929A (en) * | 2021-04-15 | 2021-07-13 | 中国铁建重工集团股份有限公司 | Load-sensitive hydraulic circuit |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04285304A (en) * | 1991-03-15 | 1992-10-09 | Komatsu Ltd | Hydraulic circuit for improving operability in load sensing system |
| CN102734276A (en) * | 2012-06-28 | 2012-10-17 | 三一汽车起重机械有限公司 | Load sensing electric proportion hydraulic control system and engineering machinery |
| CN103032396A (en) * | 2013-01-06 | 2013-04-10 | 浙江大学 | Energy-saving shield segment assembling and positioning electro-hydraulic control system adopting load-sensitive technology |
| CN203175567U (en) * | 2013-01-06 | 2013-09-04 | 浙江大学 | Energy-saving type shield segment assembling positioning electrohydraulic control system adopting load-sensitive technology |
| CN103925089A (en) * | 2014-04-09 | 2014-07-16 | 三一汽车起重机械有限公司 | Engineering machinery, dynamic energy saving method and dynamic energy saving system |
| JP2017133559A (en) * | 2016-01-26 | 2017-08-03 | 株式会社日立建機ティエラ | Hydraulic driving device of construction machine |
| CN107269609A (en) * | 2017-07-26 | 2017-10-20 | 无锡市钻通工程机械有限公司 | Combining hydraulic system in load-sensitive valve |
| CN107859671A (en) * | 2017-12-11 | 2018-03-30 | 徐州工程学院 | A kind of load sensing multi-way valve experimental rig and test method |
| CN208534883U (en) * | 2018-06-29 | 2019-02-22 | 无锡市钻通工程机械有限公司 | A kind of load sensitive control system |
-
2018
- 2018-06-29 CN CN201810692257.6A patent/CN108661967A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04285304A (en) * | 1991-03-15 | 1992-10-09 | Komatsu Ltd | Hydraulic circuit for improving operability in load sensing system |
| CN102734276A (en) * | 2012-06-28 | 2012-10-17 | 三一汽车起重机械有限公司 | Load sensing electric proportion hydraulic control system and engineering machinery |
| CN103032396A (en) * | 2013-01-06 | 2013-04-10 | 浙江大学 | Energy-saving shield segment assembling and positioning electro-hydraulic control system adopting load-sensitive technology |
| CN203175567U (en) * | 2013-01-06 | 2013-09-04 | 浙江大学 | Energy-saving type shield segment assembling positioning electrohydraulic control system adopting load-sensitive technology |
| CN103925089A (en) * | 2014-04-09 | 2014-07-16 | 三一汽车起重机械有限公司 | Engineering machinery, dynamic energy saving method and dynamic energy saving system |
| JP2017133559A (en) * | 2016-01-26 | 2017-08-03 | 株式会社日立建機ティエラ | Hydraulic driving device of construction machine |
| CN107269609A (en) * | 2017-07-26 | 2017-10-20 | 无锡市钻通工程机械有限公司 | Combining hydraulic system in load-sensitive valve |
| CN107859671A (en) * | 2017-12-11 | 2018-03-30 | 徐州工程学院 | A kind of load sensing multi-way valve experimental rig and test method |
| CN208534883U (en) * | 2018-06-29 | 2019-02-22 | 无锡市钻通工程机械有限公司 | A kind of load sensitive control system |
Non-Patent Citations (3)
| Title |
|---|
| 丁启圣等: "新型实用过滤技术", 31 December 2017, 冶金工业出版社, pages: 328 - 333 * |
| 杨耀东: "液压与气动技术", 31 August 2017, 北京理工大学出版社, pages: 81 - 85 * |
| 陈国俊: "液压挖掘机", 31 October 2011, 华中科技大学出版社, pages: 537 - 539 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058210A (en) * | 2018-10-26 | 2018-12-21 | 圣邦集团有限公司 | A kind of valve post-compensation system that pressure difference is constant |
| CN109058210B (en) * | 2018-10-26 | 2024-01-30 | 圣邦集团有限公司 | Valve post-compensation system with constant pressure difference |
| CN109973444A (en) * | 2019-04-30 | 2019-07-05 | 天津捷强动力装备股份有限公司 | A kind of hydraulic system controlling hydraulic motor zero load stabilized (steady-state) speed |
| CN112324728A (en) * | 2020-10-10 | 2021-02-05 | 湖南星邦智能装备股份有限公司 | Hydraulic system capable of preventing high temperature |
| CN113107929A (en) * | 2021-04-15 | 2021-07-13 | 中国铁建重工集团股份有限公司 | Load-sensitive hydraulic circuit |
| CN113107929B (en) * | 2021-04-15 | 2023-06-30 | 中国铁建重工集团股份有限公司 | Load sensitive hydraulic circuit |
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