CN103671295B - A kind of enclosed energy storage hydraulic system - Google Patents
A kind of enclosed energy storage hydraulic system Download PDFInfo
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- CN103671295B CN103671295B CN201310688736.8A CN201310688736A CN103671295B CN 103671295 B CN103671295 B CN 103671295B CN 201310688736 A CN201310688736 A CN 201310688736A CN 103671295 B CN103671295 B CN 103671295B
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Abstract
The invention discloses a kind of enclosed energy storage hydraulic system, comprise oil hydraulic cylinder and accumulator; The piston rod of wherein oil hydraulic cylinder A is connected with balancing weight, and the rodless cavity hydraulic fluid port of oil hydraulic cylinder A is connected with accumulator forward, and accumulator is by the rodless cavity hydraulic fluid port Opposite direction connection of plug-in type directional control valve assembly and pipeline b and oil hydraulic cylinder A; An oil outlet hydraulic oil part for auxiliary hydraulic pump group of motors accesses accumulator by pipeline c, after another part flows through reversing valve assembly and Double throttle check valve, accesses rod chamber hydraulic fluid port and the rodless cavity hydraulic fluid port of oil hydraulic cylinder A respectively.The present invention controls the flow direction of hydraulic oil in pipeline, thus the energy in oil hydraulic cylinder A and accumulator is changed mutually, by this conversion, stored energy when balancing weight can be declined is in accumulator, and when balancing weight rises, this energy is converted to the lifting force making balancing weight increase by return line, thus reach minimizing energy consumption, increase energy utilization rate.
Description
Technical field
The present invention relates to a kind of manufacturing technology field of rapid shaping hydraulic press, particularly relate to the closed type hydraulic system being applied to and deep drawing hydraulic machine can realizing fast energy-saving.
Background technique
Existing deep drawing hydraulic machine ejecting function is all by configuring independent Oil pump electrical machinery as power source, and supporting corresponding hydrovalve control unit realizes; Above-mentioned configuration needs to use large discharge oil pump and heavy-duty motor to drive, and ejects speed lower; And belong to full flow passive high pressure kicks during passive pressure, whole system device energy loss is large, and heating is serious, does not have quick ejecting function, passive descending time pressure little instability, special process forming requirements cannot be completed.
Press machine, when carrying out drawing, provides pressure by balancing weight, makes to be subject to controllable pressure-pad-force by the object of drawing, thus carries out drawing and forming.Wherein, balancing weight needs to-and-fro motion when drawing, namely pumps, and balancing weight is when moving down, and motor does work to it; After drawing, need to promote balancing weight.Existing hydraulic system is configuration motor, by motor, balancing weight is risen to precalculated position.In this process, motor needs the gravitational potential energy overcoming balancing weight, and to balancing weight acting, need to consume a large amount of energy, energy effect is low.
In order to solve above-mentioned deficiency of the prior art, the present invention proposes a kind of new solution.
Summary of the invention
Object of the present invention provides a kind of hydraulic system, can by the stored energy of system self, thus reduces the consumption of hydraulic press integral energy, improves the utilization ratio of the energy, simultaneously can to the rising or falling speed of balancing weight, and in pipeline, hydraulic oil is monitored.
For reaching above-mentioned purpose, the technical solution adopted in the present invention is: provide a kind of enclosed energy storage hydraulic system, comprises oil hydraulic cylinder, accumulator, hydraulic valve assembly, fuel tank and auxiliary hydraulic pump group of motors;
Oil hydraulic cylinder comprises oil hydraulic cylinder A and oil hydraulic cylinder B, and the piston rod of oil hydraulic cylinder A is connected with balancing weight, and the rodless cavity hydraulic fluid port of oil hydraulic cylinder A is connected with accumulator forward by the pipeline a being provided with one-way valve;
Accumulator passes through the rodless cavity hydraulic fluid port Opposite direction connection of plug-in type directional control valve assembly and pipeline b and oil hydraulic cylinder A;
The filler opening of auxiliary hydraulic pump group of motors is connected with fuel tank, and a hydraulic oil part for its oil outlet accesses accumulator by pipeline c; After another part flows through reversing valve assembly and Double throttle check valve, accessed the rodless cavity hydraulic fluid port of oil hydraulic cylinder A by pipeline b, accessed the rod chamber hydraulic fluid port of oil hydraulic cylinder A by pipeline d.
Preferably, the rodless cavity hydraulic fluid port of oil hydraulic cylinder B is connected with drop tank.
Preferably, pipeline c is provided with one-way valve.
Preferably, the pipeline that the oil outlet of auxiliary hydraulic pump group of motors connects is provided with relief valve.
Preferably, pipeline b is connected with relief valve and pressure transducer.
Preferably, oil hydraulic cylinder B is connected with pressure control assembly.
Preferably, pressure control assembly comprises the plug-in type pressure controlled valve group that pressure controlled valve group, electrohydraulic proportional control valve group, pressure transducer and telecontrol regulate pressure.
In sum, the present invention has the following advantages:
1, by design cycle pipeline, by oil hydraulic cylinder A, oil hydraulic cylinder B, accumulator and auxiliary hydraulic pump group of motors link together, multiple pipe valve is installed in pipeline, the flow direction of hydraulic oil in pipeline is controlled, thus the energy in oil hydraulic cylinder A and accumulator is changed mutually, by this conversion, stored energy when balancing weight can be declined is in accumulator, and when balancing weight rises, this energy is converted to the lifting force making balancing weight increase by return line, thus reach minimizing energy consumption, reduce installed power, heating value reduces, increase energy utilization rate simultaneously.
2, hydraulic oil circulation loop of the present invention is provided with relief valve, one-way valve and pressure control assembly, hydraulic oil in pipeline is monitored in real time, the circulation of hydraulic oil in pipeline can not only be made more unobstructed, and enhance the Safety performance of hydraulic system, prevent the potential risk that pipeline high pressure causes.
3, pipeline is provided with Double throttle check valve and selector valve, fluid,matching cylinder pressure B, can regulate the flow of hydraulic oil in pipeline and the speed of balancing weight lifting.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Wherein, 1, oil hydraulic cylinder A; 2, accumulator; 3, oil hydraulic cylinder B; 4, auxiliary hydraulic pump group of motors; 5, balancing weight; 6, Double throttle check valve; 7, pressure control assembly; 8, plug-in type directional control valve assembly; 9, drop tank; 10, relief valve; 11, reversing valve assembly; 12, pressure transducer; 13, one-way valve.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
As shown in Figure 1, enclosed energy storage hydraulic system provided by the invention, comprises oil hydraulic cylinder, accumulator 2, hydraulic valve assembly, fuel tank and auxiliary hydraulic pump group of motors 4.The inside of oil hydraulic cylinder is provided with piston, and the lower seal of piston has hydraulic oil.Hydraulic valve assembly is the conventional connection control assembly be arranged on pipeline, and it comprises the Sealing etc. of valve and connecting pipeline.Accumulator 2 can be spring, heavy hammer type and gas type.Oil hydraulic cylinder comprises oil hydraulic cylinder A1 and oil hydraulic cylinder B3, and oil hydraulic cylinder B3 is mainly used in making balancing weight 5 keep balance, and its rodless cavity hydraulic fluid port is connected with drop tank 9.The piston rod upper end of oil hydraulic cylinder A1 is connected with balancing weight 5, lower end sealing fluid force feed.The rodless cavity hydraulic fluid port of oil hydraulic cylinder A1 is connected with accumulator 2 forward by the pipeline a being provided with one-way valve; Make the hydraulic oil of oil hydraulic cylinder A1 inside can enter in the Seal cage of accumulator 2 lower end by pipeline a, energy accumulation.Pipeline a is connected with the pipeline b for accumulator 2 hydraulic oil reflux cycle.Accumulator passes through the rodless cavity hydraulic fluid port Opposite direction connection of plug-in type directional control valve assembly 8 and pipeline b and oil hydraulic cylinder A1, makes the hydraulic oil in accumulator 2 can enter the rodless cavity hydraulic fluid port of oil hydraulic cylinder A1 along pipeline b, avoids conflicting mutually with other pipelines.
The filler opening of auxiliary hydraulic pump group of motors 4 is connected with fuel tank, and a hydraulic oil part for its oil outlet accesses accumulator 2 by the pipeline c being provided with one-way valve 13; After another part flows through Double throttle check valve 6 and reversing valve assembly 11, accessed the rodless cavity hydraulic fluid port of oil hydraulic cylinder A1 by pipeline b, accessed the rod chamber hydraulic fluid port of oil hydraulic cylinder A1 by pipeline d.
In order to strengthen the Safety performance of system, the pipeline that the oil outlet of auxiliary hydraulic pump group of motors 4 connects is provided with relief valve 10; Pipeline b is connected with relief valve and pressure transducer 12.Oil hydraulic cylinder B3 is connected with pressure control assembly 7 by collateral branch's pipeline, and this pressure control assembly 7 comprises the plug-in type pressure controlled valve group that pressure controlled valve group, electrohydraulic proportional control valve group, pressure transducer and telecontrol regulate pressure.
When system cloud gray model is initial, in the pipeline of system and oil hydraulic cylinder, there is no hydraulic oil, need in hydraulic oil press-in oil hydraulic cylinder, accumulator 2 and the connecting pipeline inside by fuel tank.Pipeline b is accessed through pipeline c in hydraulic oil one tunnel in fuel tank, shunts after node, and wherein a part of hydraulic oil flows into accumulator 2, and another part hydraulic oil enters oil hydraulic cylinder A1, makes the piston of oil hydraulic cylinder A1 promote balancing weight 5 up.Now can according to actual loading size, the upper line height of adjustment balancing weight 5.Oil hydraulic cylinder A1 is in Oil feeding process, and balancing weight 5 is up, and the piston rod of oil hydraulic cylinder B3 is connected with balancing weight 5, makes the inside of oil hydraulic cylinder B3 form vacuum, the hydraulic oil of drop tank 9 inside is entered in oil hydraulic cylinder B3.
Can run after system call interception, during device action, blind off a line b and pipeline c, start auxiliary hydraulic pump group of motors 4, fuel tank internal hydraulic oil is made to enter the rod chamber hydraulic fluid port of oil hydraulic cylinder A1 through pipeline d, make piston stressed, drive balancing weight 5 descending, the piston in oil hydraulic cylinder A1 is about to down hydraulic oil by pipeline a press-in accumulator 2 thereupon.Pipeline a is provided with one-way valve, can prevent hydraulic oil from refluxing through pipeline a.Pipeline b is provided with reversing valve assembly 11, relief valve 10 and pressure transducer 12, can prevent the descending hydraulic oil feed line b of oil hydraulic cylinder A1, monitor simultaneously, prevent oil pressure too high to the oil pressure in pipeline b.
After balancing weight 5 is descending, when carrying out next operation, need balancing weight 5 to be raised to precalculated position.Now pipeline a is closed, allow the hydraulic energy in accumulator 2 enter the bottom chamber of oil hydraulic cylinder A1 along pipeline b, make the piston in oil hydraulic cylinder A1 upwards stressed, thus drive balancing weight 5 to rise.In the process that balancing weight 5 is up or descending, the selector valve in pipeline b and Double throttle check valve 6 control the hydraulic oil in respective pipeline respectively, make the speed uplink of balancing weight 5 or downstream rate be easy to control adjustment.Reversing valve assembly 11 is connected with stop valve, and this stop valve can control the working condition of reversing valve assembly.
Wherein, pipeline c is provided with one-way valve 13, avoids the hydraulic oil backflow of flowing out from auxiliary hydraulic pump group of motors 4, can strengthen the Safety performance of system.The pipeline simultaneously connected at the oil outlet of auxiliary hydraulic pump group of motors 4 is provided with relief valve 10, and this relief valve 10 is connected with drop tank, and this drop tank and the drop tank be connected with oil hydraulic cylinder B are not same drop tank.The effect of relief valve 10 is the oil pressure of supervisory system pipeline, prevents oil pressure too high, when oil pressure is higher than predefined value, opens decompression function, avoids security incident.
Claims (6)
1. an enclosed energy storage hydraulic system, is characterized in that: comprise oil hydraulic cylinder, accumulator, hydraulic valve assembly, fuel tank and auxiliary hydraulic pump group of motors;
Described oil hydraulic cylinder comprises oil hydraulic cylinder A and oil hydraulic cylinder B, and oil hydraulic cylinder A is all connected with balancing weight with the piston rod of oil hydraulic cylinder B, and the rodless cavity hydraulic fluid port of oil hydraulic cylinder A is connected with accumulator forward by the pipeline a being provided with one-way valve;
Described accumulator passes through the rodless cavity hydraulic fluid port Opposite direction connection of plug-in type directional control valve assembly and pipeline b and oil hydraulic cylinder A;
The filler opening of described auxiliary hydraulic pump group of motors is connected with fuel tank, and a hydraulic oil part for its oil outlet accesses accumulator by pipeline c; After another part flows through reversing valve assembly and Double throttle check valve, accessed the rodless cavity hydraulic fluid port of oil hydraulic cylinder A by pipeline b, accessed the rod chamber hydraulic fluid port of oil hydraulic cylinder A by pipeline d; The rodless cavity hydraulic fluid port of described oil hydraulic cylinder B is connected with drop tank.
2. enclosed energy storage hydraulic system as claimed in claim 1, is characterized in that: described pipeline c is provided with one-way valve.
3. enclosed energy storage hydraulic system as claimed in claim 1, is characterized in that: the oil outlet connecting pipeline of described auxiliary hydraulic pump group of motors is provided with relief valve.
4. enclosed energy storage hydraulic system as claimed in claim 1, is characterized in that: described pipeline b is connected with relief valve and pressure transducer.
5. enclosed energy storage hydraulic system as claimed in claim 1, is characterized in that: described oil hydraulic cylinder B is connected with pressure control assembly.
6. enclosed energy storage hydraulic system as claimed in claim 5, is characterized in that: described pressure control assembly comprises the plug-in type pressure controlled valve group that pressure controlled valve group, electrohydraulic proportional control valve group, pressure transducer and telecontrol regulate pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310688736.8A CN103671295B (en) | 2013-12-17 | 2013-12-17 | A kind of enclosed energy storage hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310688736.8A CN103671295B (en) | 2013-12-17 | 2013-12-17 | A kind of enclosed energy storage hydraulic system |
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| CN103671295A CN103671295A (en) | 2014-03-26 |
| CN103671295B true CN103671295B (en) | 2016-03-16 |
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| CN201310688736.8A Expired - Fee Related CN103671295B (en) | 2013-12-17 | 2013-12-17 | A kind of enclosed energy storage hydraulic system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105114372B (en) * | 2015-09-06 | 2017-07-04 | 山东钢铁集团日照有限公司 | A kind of Hydraulic Pressure System of Reheating Furnace power-economizing method and device |
| CN109139586B (en) * | 2018-10-16 | 2023-08-18 | 大连华东液压件有限公司 | Variable-pressure type underwater pelletizer cutterhead moving hydraulic system and working method thereof |
| CN111237262A (en) * | 2018-12-26 | 2020-06-05 | 金马工业集团股份有限公司 | Hydraulic system |
| CN112594262A (en) * | 2020-12-16 | 2021-04-02 | 徐州徐工挖掘机械有限公司 | Energy recovery system for construction machine and construction machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101435451A (en) * | 2008-12-09 | 2009-05-20 | 中南大学 | Movable arm potential energy recovery method and apparatus of hydraulic excavator |
| CN202787369U (en) * | 2012-04-27 | 2013-03-13 | 华侨大学 | Hydraumatic excavating energy saving system |
| CN202926765U (en) * | 2012-05-22 | 2013-05-08 | 山河智能装备股份有限公司 | Hydraulic system for working device potential energy recovery |
| CN103174688A (en) * | 2013-03-27 | 2013-06-26 | 南京工业大学 | Hydraulic energy-saving system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7441405B2 (en) * | 2006-03-31 | 2008-10-28 | Caterpillar Inc. | Cylinder with internal pushrod |
| US9279236B2 (en) * | 2012-06-04 | 2016-03-08 | Caterpillar Inc. | Electro-hydraulic system for recovering and reusing potential energy |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435451A (en) * | 2008-12-09 | 2009-05-20 | 中南大学 | Movable arm potential energy recovery method and apparatus of hydraulic excavator |
| CN202787369U (en) * | 2012-04-27 | 2013-03-13 | 华侨大学 | Hydraumatic excavating energy saving system |
| CN202926765U (en) * | 2012-05-22 | 2013-05-08 | 山河智能装备股份有限公司 | Hydraulic system for working device potential energy recovery |
| CN103174688A (en) * | 2013-03-27 | 2013-06-26 | 南京工业大学 | Hydraulic energy-saving system |
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Granted publication date: 20160316 Termination date: 20171217 |