CN208185095U - Load port based on single side outlet throttling control valve group/discharge capacity autonomous control system - Google Patents
Load port based on single side outlet throttling control valve group/discharge capacity autonomous control system Download PDFInfo
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- CN208185095U CN208185095U CN201820527624.2U CN201820527624U CN208185095U CN 208185095 U CN208185095 U CN 208185095U CN 201820527624 U CN201820527624 U CN 201820527624U CN 208185095 U CN208185095 U CN 208185095U
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Abstract
A kind of load port based on single side outlet throttling control valve group/discharge capacity autonomous control system, single side outlet throttling control valve group allow two chamber of hydraulic cylinder to be independently connected to high pressure or low pressure oil way, realize energy regeneration and recycling using two two-bit triplet reversal valves；Guarantee that proportional control valve is always positioned at hydraulic cylinder and exports on oil circuit by three position four-way directional control valve, actuator speed is controlled in a manner of import standard-sized sheet, outlet throttle timing, inlet throttle is eliminated and loses and reduce flow control valve quantity.Each actuator includes an open type variable pump and a set of single side outlet throttling valve group, to eliminate energy loss caused by legacy system difference actuator load pressure difference；Furthermore pump can be used as motor operations recycling Exceed load energy under take-back model.The utility model can be achieved at the same time the independent control of disengaging valve port and variable pump, further decrease the valve port restriction loss of conventional load mouth independent control valve group；Simultaneously by energy regeneration and recycling function, system energy consumption is effectively reduced.
Description
Technical field
The utility model relates to hydraulic control system, especially a kind of engineering machinery hydraulic control system.
Background technique
Construction machinery hydraulic system controls multiple actuators by limited quantity power source, has flow and pressure requirements real
The features such as Shi Bianhua, impedance load and Exceed load frequent changes.Load sensitive system is that current engineering machinery is commonly a kind of
Hydraulic control system, mainly by the load-sensitive valve with pressure compensator and load-reacting pump group at.But the system
Inevitable there are three aspect energy losses: preset pressure margin loss, and direction valve restriction loss and different loads pressure are mended
Repay loss.In order to reduce restriction loss, load port autonomous control system can be used.The system is using the disengaging for eliminating structure linkage
Mouth independent spool, can independently control disengaging valve port area.By increased control freedom degree, outlet valve throttling damage is reduced
It loses, improves the capacity usage ratio under Exceed load operating condition.But load port independent control is only capable of optimization direction valve valve port pressure damage
It loses, not can significantly reduce the pressure loss caused by preset pressure nargin and different loads pressure difference.It is born to overcome to have
Carry mouth autonomous control system energy conservation characteristic and be difficult to the deficiency further promoted, the utility model provide one kind can effectively meet into
Independent control function is exported, while restriction loss is few, controls simple and safe and reliable construction machinery hydraulic system control system.
Summary of the invention
A kind of load port based on single side outlet throttling control valve group/discharge capacity autonomous control system, each actuator wrap
Containing a single side outlet throttling control valve group and a variable pump.
Single side outlet throttling control valve group includes: rodless cavity high-low pressure oil circuit electromagnetic switching valve 1, rod chamber high-low pressure oil circuit
Switching valve 2, solenoid directional control valve 3, proportional control valve 4；P mouthfuls of connections of the load port separate control valves pump high pressure oil port, T mouthfuls of connections
Fuel tank, actuator port A and B are reversal valve actuator port a3 and b3, are connected to respectively with hydraulic cylinder inlet and outlet；The solenoid directional control valve
3 control the direction of motion and stopping of hydraulic cylinder using 3-position 4-way electromagnetic direction valve；The proportional control valve 4 is proportional flow
Control valve；The oil inlet p3 of solenoid directional control valve 3 is connected to the actuator port a1 of rodless cavity high-low pressure oil passage change-over valve 1；Electromagnetism changes
It is connected to the oil return opening t3 of valve 3 with the actuator port a2 of rod chamber high-low pressure oil passage change-over valve 2；Using two-bit triplet electromagnetic switch
Valve allows two chamber of hydraulic cylinder to be independently connected to high pressure or low pressure oil way as high-low pressure oil passage change-over valve 1 and 2, realizes
The energy regeneration and recycling of hydraulic cylinder.
Proportional control valve 4 is arranged between rod chamber high-low pressure oil passage change-over valve 2 and solenoid directional control valve 3, oil inlet a4
It is connected with the oil return opening t3 of solenoid directional control valve 3, the actuator port a2 phase of oil outlet b4 and rod chamber high-low pressure oil passage change-over valve 2
Even；Guarantee that the proportional control valve 4 exports on oil circuit in hydraulic cylinder always by solenoid directional control valve 3, with import standard-sized sheet, outlet section
Method of flow control controls the speed of actuator, reduces the quantity and inlet throttle loss of flow control valve.
The beneficial effects of the utility model are mainly manifested in:
1. effectively meeting the motion control requirement under four-quadrant load behavior by single side outlet throttling control valve group；Together
When, it realizes the functions such as flow regeneration, energy regenerating, reduces the energy loss of hydraulic system；
2. outlet throttling control mode makes import standard-sized sheet, the valve port pressure loss of inlet valve is reduced；Further, since only
Unilateral throttling control is needed, the quantity of proportional flow control unit is reduced；
3. each actuator includes an open type variable pump and a set of single side outlet throttling valve group, supplied between different actuators
Oil pressure independent can be adjusted, and eliminate valve port restriction loss caused by pressure difference between different loads；Meanwhile it can incite somebody to action
Pump is used as motor operations, recycles the energy of Exceed load completely
4. the displacement control that single open type pump is used only in each actuator can be achieved with the control of four-quadrant load behavior, nothing
Complicated closed system need to be used.
Detailed description of the invention
Fig. 1 is using single side outlet throttling control valve group load port/discharge capacity autonomous control system schematic diagram.
Fig. 2 is single side outlet throttling control valve group schematic diagram.
Fig. 3 is the schematic diagram for carrying out piston rod extending action in the normal mode for the utility model.
Fig. 4 is the schematic diagram for carrying out piston rod retract action in the normal mode for the utility model.
Fig. 5 is the schematic diagram for carrying out piston rod extending action in the regenerative mode for the utility model.
Fig. 6 is the schematic diagram for carrying out piston rod retract action under floating mode for the utility model.
Fig. 7 is the schematic diagram for carrying out piston rod extending action under floating mode for the utility model.
Fig. 8 is the schematic diagram for carrying out piston rod retract action under take-back model for the utility model.
Fig. 9 is the schematic diagram for carrying out piston rod extending action under take-back model for the utility model.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.
Referring to Figures 1 and 2, load port/discharge capacity autonomous control system based on single side outlet throttling control valve group, the system
Hydraulic actuator can be driven in four-quadrant loaded work piece, each actuator includes a variable pump and a set of control valve
Group, each actuator charge oil pressure independent can be adjusted, the ratio that the speed of actuator passes through single side outlet throttling valve group
Control valve 4 is adjusted.
According to load characteristic difference, system includes four kinds of operating modes.In the normal mode, hydraulic cylinder is extended and contracts
It returns；In the regenerative mode, underloading two chamber of hydraulic cylinder can be connected to pump high-pressure oil passage simultaneously, reduce the fuel supply flow rate of pump.In floating die
Under formula, two chamber of hydraulic cylinder can be connected to the differential mode of low pressure oil return line simultaneously, using the energy of Exceed load without oil pump feed；
Under take-back model, pump can be used as motor operations, and the energy of Exceed load is made to be transferred to other loads in the form of torque
Pump.
It should be noted that the number of pump is determined by the number of actuator；This system is by taking double actuators as an example, such as actuator
Number increase, then the number of the number of corresponding increasing pump and control valve group.
Referring to Fig. 3,1 power loss of switching valve, switching valve 2 it is electric, 3 electromagnet a of solenoid directional control valve obtains electric, and hydraulic cylinder is without bar
Chamber connection pump high pressure oil, rod chamber are connected to low pressure oil return line, and proportional control valve 4 is living between actuator port B and switching valve 2
Stopper rod stretches out, and pushes resistant load, and movement velocity is adjusted by proportional control valve 4.
Referring to Fig. 4,1 power loss of switching valve, switching valve 2 it is electric, 3 electromagnet b of solenoid directional control valve obtains electric, and hydraulic cylinder is without bar
Chamber is connected to low pressure oil return line, rod chamber connection pump high pressure oil, and proportional control valve 4 is lived between actuator port A and switching valve 2
Plug retracts, and pulls resistant load, and movement velocity is adjusted by proportional control valve 4.
Referring to Fig. 5, the equal power loss of switching valve 1 and 2,3 electromagnet a of solenoid directional control valve obtains electric, hydraulic cylinder rodless cavity and has
Rod cavity is connected to pump high pressure oil, and piston stretches out, and forms energy regeneration circuit, and rodless cavity is flowed back in the oil return of rod chamber again, reduces
The required flow of pump.
Referring to Fig. 6, the switching valve 1 and 2 it is electric, 3 electromagnet b of solenoid directional control valve obtain it is electric, hydraulic cylinder rodless cavity with have
Rod cavity is connected to low pressure oil return line, and piston retracts, and forms energy recovery circuit, and rod chamber is flowed back in the oil return of rodless cavity again, benefit
With the energy more loaded, it is not necessarily to oil pump feed.
Referring to Fig. 7, the switching valve 1 and 2 it is electric, 3 electromagnet a of solenoid directional control valve obtain it is electric, hydraulic cylinder rodless cavity with have
Rod cavity is connected to low pressure oil return line, and piston stretches out, and forms energy recovery circuit, and rodless cavity is flowed back in the oil return of rod chamber again, benefit
With the energy of Exceed load, it is not necessarily to oil pump feed.
Referring to Fig. 8, the switching valve 1 electric, 2 power loss of switching valve, 3 electromagnet b of solenoid directional control valve obtain electric, hydraulic cylinder is without bar
Chamber connection pump, retracts in load effect lower piston, and pump is used as motor operations, recycles the energy of Exceed load, the energy is with torque
Form is transferred to other pumps of shaft coupling work.
Referring to Fig. 9, the switching valve 1 electric, 2 power loss of switching valve, 3 electromagnet a of solenoid directional control valve obtain electric, hydraulic cylinder has bar
Chamber connection pump, stretches out in load effect lower piston, and pump is used as motor operations, recycles the energy of Exceed load, the energy is with torque
Form is transferred to other pumps of shaft coupling work.
Claims (4)
1. the load port based on single side outlet throttling control valve group/discharge capacity autonomous control system, it is characterised in that: including rodless cavity
High-low pressure oil passage change-over valve, rod chamber high-low pressure oil passage change-over valve, solenoid directional control valve, proportional control valve, the solenoid directional control valve
Actuator port is connected to hydraulic cylinder inlet and outlet, and the direction of motion of hydraulic cylinder is controlled using 3-position 4-way electromagnetic direction valve and is stopped
Only, the proportional control valve is operated proportional flow control valve；The oil inlet of solenoid directional control valve and oil return opening respectively with rodless cavity and have
The high-low pressure oil passage change-over valve actuator port of rod cavity is connected to, and is switched using two-bit triplet solenoid directional control valve as high-low pressure oil circuit
Valve allows two chamber of hydraulic cylinder to be independently connected to high pressure or low pressure oil way, realizes the energy regeneration and recycling of hydraulic cylinder.
2. the load port based on single side outlet throttling control valve group/discharge capacity autonomous control system, it is characterised in that: proportional control valve
It is arranged between rod chamber high-low pressure oil passage change-over valve and solenoid directional control valve, guarantees that the proportional control valve begins by solenoid directional control valve
Eventually on hydraulic cylinder outlet oil circuit, with the speed of import standard-sized sheet, outlet throttling control method control actuator, flow control is reduced
The quantity and inlet throttle of valve processed are lost, and the solenoid directional control valve uses 3-position 4-way electromagnetic direction valve, the rod chamber height
Oil passage change-over valve and rodless cavity high-low pressure oil passage change-over valve is pressed to use two-bit triplet solenoid directional control valve, the proportional control valve uses
Operated proportional flow control valve.
3. load port/discharge capacity autonomous control system as claimed in claim 1 or 2 based on single side outlet throttling control valve group,
Each actuator includes an open type variable pump and a set of single side outlet throttling valve group, and each actuator charge oil pressure can be independent
It is adjusted, while pump can be used as motor operations, recycle the energy of Exceed load completely.
4. load port/discharge capacity autonomous control system as claimed in claim 1 or 2 based on single side outlet throttling control valve group,
The control of four-quadrant load behavior can be realized in displacement control in open system through variable pump, closes without using complicated
Formula system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820527624.2U CN208185095U (en) | 2018-04-14 | 2018-04-14 | Load port based on single side outlet throttling control valve group/discharge capacity autonomous control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820527624.2U CN208185095U (en) | 2018-04-14 | 2018-04-14 | Load port based on single side outlet throttling control valve group/discharge capacity autonomous control system |
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| Publication Number | Publication Date |
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| CN208185095U true CN208185095U (en) | 2018-12-04 |
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| CN201820527624.2U Active CN208185095U (en) | 2018-04-14 | 2018-04-14 | Load port based on single side outlet throttling control valve group/discharge capacity autonomous control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343649A (en) * | 2018-04-14 | 2018-07-31 | 华东交通大学 | Load port based on single side outlet throttling control valve group/discharge capacity autonomous control system |
| CN110671376A (en) * | 2019-09-29 | 2020-01-10 | 中国矿业大学 | Engineering machinery load sensitive-inlet-outlet independent hydraulic system and control method thereof |
| CN111828409A (en) * | 2020-07-23 | 2020-10-27 | 中国人民解放军陆军装甲兵学院 | Hydraulic drive unit based on two-stage energy supply and load port independent valve control technology |
| CN113202833A (en) * | 2021-05-24 | 2021-08-03 | 华东交通大学 | Load port independent control system matched with electro-hydraulic flow |
-
2018
- 2018-04-14 CN CN201820527624.2U patent/CN208185095U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343649A (en) * | 2018-04-14 | 2018-07-31 | 华东交通大学 | Load port based on single side outlet throttling control valve group/discharge capacity autonomous control system |
| CN108343649B (en) * | 2018-04-14 | 2024-02-06 | 华东交通大学 | Load port/displacement independent control system based on single-side outlet throttle control valve group |
| CN110671376A (en) * | 2019-09-29 | 2020-01-10 | 中国矿业大学 | Engineering machinery load sensitive-inlet-outlet independent hydraulic system and control method thereof |
| CN111828409A (en) * | 2020-07-23 | 2020-10-27 | 中国人民解放军陆军装甲兵学院 | Hydraulic drive unit based on two-stage energy supply and load port independent valve control technology |
| CN113202833A (en) * | 2021-05-24 | 2021-08-03 | 华东交通大学 | Load port independent control system matched with electro-hydraulic flow |
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