CN201874918U - Composite hydraulic cylinder and electro-hydraulic proportional lifting system thereof - Google Patents
Composite hydraulic cylinder and electro-hydraulic proportional lifting system thereof Download PDFInfo
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- CN201874918U CN201874918U CN2010206025781U CN201020602578U CN201874918U CN 201874918 U CN201874918 U CN 201874918U CN 2010206025781 U CN2010206025781 U CN 2010206025781U CN 201020602578 U CN201020602578 U CN 201020602578U CN 201874918 U CN201874918 U CN 201874918U
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- 239000002131 composite material Substances 0.000 title claims description 40
- 238000010276 construction Methods 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 41
- 238000005086 pumping Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003129 oil well Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 239000002689 soil Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract 2
- 230000005611 electricity Effects 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 238000009434 installation Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 36
- 238000010586 diagram Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 241001023788 Cyttus traversi Species 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
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Abstract
The utility model discloses a compound pneumatic cylinder and electricity liquid proportion lifting system thereof belongs to the lifting device field. The utility model provides an electricity liquid proportion lifts system is connected with hydraulic accumulator through the compound pneumatic cylinder that will have the counter weight chamber, replaces the effect of mechanical counter weight, makes system's simple structure, easily installation lift, therefore has reduced capital construction work volume, makes it can use in the area that soil pressure bearing is low, ground construction difficulty, utilizes hydraulic accumulator's energy-conserving advantage simultaneously, has reduced the installed power and the energy consumption of system of lifting by a wide margin, and the engineering practicality is strong.
Description
Technical field
The utility model relates to the lift device field, particularly a kind of energy-saving electric-hydraulic proportion hoisting system.
Background technique
Rod pumping pump is because simple in structure, technical maturity, easy and simple to handle and maintenance easily, are main mechanical oil recovery equip ments, and the oil field all over the world is widely used.
At the scene, oil field, what the rod pumping pump use was more is the slide beam lift device at present, and the slide beam lift device mainly is made up of four major parts such as walking beam, connecting rod, crank mechanism, speed reducer, power equipment and auxiliary equipment.During work, the transmission of motor becomes moving up and down of horse head through speed reducer, crank mechanism, connecting rod, horse head moves up and down through the plunger that polished rod, sucker rod drive downhole pump, thereby constantly the crude oil in the well is extracted out pit shaft, during work by the horse head realization counterweight that on walking beam, moves around.
In realizing process of the present utility model, the inventor finds that there is following problem at least in prior art:
Shortcoming such as slide beam lift device counterbalance effect is undesirable, parameter adjustment is inconvenient, sucker rod mechanical wear is serious, the heavy huge and equipment of structure and capital construction have high input.
The model utility content
The utility model is in order to solve the deficiencies in the prior art, a kind of composite hydraulic cylinder and electric-hydraulic proportion hoisting system thereof are provided, be connected with hydraulic accumulator by the composite hydraulic cylinder that will have the counterweight chamber, substitute the effect of mechanical counterweight, make hoisting system simple in structure, be easy to install, thereby reduced the construction project amount, it can be used in area low in the soil pressure-bearing, that foundation construction is difficult, utilize the power savings advantages of hydraulic accumulator simultaneously, reduced the installed power and the energy consumption of hoisting system significantly, engineering practicability is strong.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of composite hydraulic cylinder comprises:
Comprise the fixing column plug cylinder, the top of described fixing column plug cylinder is provided with breach, the bottom of described fixing column plug cylinder is connected with base, described base is provided with non-movable piston, described non-movable piston is located in the described fixing column plug cylinder, form chuck with described fixing column plug cylinder, be provided with mobile piston in the described chuck;
The upper surface of described mobile piston is connected with the opening end of mobile piston cylinder, and the sealing end of described mobile piston cylinder passes described breach;
Form first active chamber between described mobile piston cylinder, described mobile piston and the described fixing column plug cylinder three, form second active chamber between described mobile piston cylinder, described mobile piston and the described non-movable piston three, form the counterweight chamber between described mobile piston, described non-movable piston, described fixing column plug cylinder and the described base;
The chamber wall of described first active chamber is provided with the first oil transportation hole, and the chamber wall of described second active chamber is provided with the second oil transportation hole, and the chamber wall in described counterweight chamber is provided with counterweight oil transportation hole.
The described first oil transportation hole is located on the described fixing column plug cylinder, and communicates with described first active chamber.
Described non-movable piston is a hollow-core construction, and the described second oil transportation hole is located on the described base, and with described hollow communicating.
Described counterweight oil transportation hole is located on the described fixing column plug cylinder, and communicates with described counterweight chamber.
Another technological scheme that the utility model embodiment provides is:
A kind of electric-hydraulic proportion hoisting system comprises the working connection oil hydraulic pump, and described working connection oil hydraulic pump is connected with first one-way valve, and described first one-way valve is connected with electrohydraulic proportional directional valve, also comprises:
Two composite hydraulic cylinders, first active chamber of described composite hydraulic cylinder is connected with described electrohydraulic proportional directional valve with second active chamber, the sealing end of the mobile piston cylinder of described composite hydraulic cylinder is connected with lifting frame, and the counterweight oil transportation hole of described composite hydraulic cylinder is connected with hydraulic accumulator;
Described hydraulic accumulator is connected with second one-way valve, and described second one-way valve is connected with the repairing oil hydraulic pump;
Two described composite hydraulic cylinders equate with the central shaft distance of described lifting frame, treat that lift device is positioned at the central axis of described lifting frame.
Described electric-hydraulic proportion hoisting system, also comprise displacement transducer, the input end of described displacement transducer is connected with the described lift device for the treatment of, the output terminal of described displacement transducer is connected with the input end of adder, the input end of described adder also is connected with the displacement signal output unit, and the output terminal of described adder is connected with described electrohydraulic proportional directional valve.
The described lift device for the treatment of is a rod pumping pump, and described rod pumping pump comprises sucker rod, and described sucker rod lower end is connected with oil well pump, and described sucker rod upper end is connected with described lifting frame.
The beneficial effect of the technological scheme that the utility model embodiment provides is: combine with hydraulic accumulator by the composite hydraulic cylinder that will have the counterweight chamber, substitute the effect of mechanical counterweight, make hoisting system simple in structure, be easy to install, thereby reduced the construction project amount, the area that it can be low in the soil pressure-bearing, foundation construction is difficult is used, but the electric-hydraulic proportion hoisting system have stroke jig frequency step-less adjustment, up-downgoing adjustable-speed, commutation and has reduced advantages such as the installed power of hoisting system and energy consumption and engineering practicability are strong steadily, significantly simultaneously.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment's technological scheme, to do one to the accompanying drawing that uses among the embodiment below introduces simply, apparently, below listed accompanying drawing only be embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the composite hydraulic cylinder schematic representation that the utility model embodiment provides;
Fig. 2 is the electric-hydraulic proportion hoisting system schematic representation that the utility model embodiment provides.
In the accompanying drawing, the component list of each label representative is as follows:
1, working connection oil hydraulic pump, 2, first relief valve, 3, first one-way valve, 4, first safety valve, 5, accurate filter, 6, electrohydraulic proportional directional valve, 7, composite hydraulic cylinder, 8, the repairing oil hydraulic pump, 9, second one-way valve, 10, second relief valve, 11, second safety valve, 12, hydraulic accumulator, 13, oil well pump, 14, sucker rod, 15, lifting frame, 16, displacement transducer, 17, adder, 18, the displacement signal output unit, 19, displacement controller;
7-1, non-movable piston, 7-2, displacement piston, 7-3, mobile piston cylinder, 7-4, fixing column plug cylinder, 7-5, second active chamber, 7-6, the second oil transportation hole, 7-7, counterweight oil transportation hole, 7-8, counterweight chamber, 7-9, first active chamber, 7-10, the first oil transportation hole, 7-11, base.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, the utility model mode of execution is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 1, a kind of composite hydraulic cylinder, comprise downward opening fixing column plug cylinder 7-4, the top of fixing column plug cylinder 7-4 is provided with breach, the bottom of fixing column plug cylinder 7-4 is connected with base 7-11, base 7-11 is provided with non-movable piston 7-1, non-movable piston 7-1 is located in the fixing column plug cylinder 7-4, form chuck with fixing column plug cylinder 7-4, be provided with mobile piston 7-2 in the described chuck, the inner side edge of mobile piston 7-2 contacts with non-movable piston 7-1, the outer side of mobile piston 7-2 contacts with fixing column plug cylinder 7-4, the upper surface of mobile piston 7-2 is connected with the opening end of mobile piston cylinder 7-3, and the sealing end of mobile piston cylinder 7-3 passes the breach of fixing column plug cylinder 7-4, and the casing wall outer surface contacts with fixing column plug cylinder 7-4;
The cavity that forms between mobile piston cylinder 7-3, mobile piston 7-2 and the fixing column plug cylinder 7-4 three is the first active chamber 7-9, the cavity that forms between mobile piston cylinder 7-3, mobile piston 7-2 and the non-movable piston 7-1 three is the second active chamber 7-5, and the cavity that forms between mobile piston 7-2, non-movable piston 7-1, fixing column plug cylinder 7-4 and the base 7-11 is counterweight chamber 7-8;
The chamber wall of the first active chamber 7-9 is provided with the first oil transportation hole 7-10, and the chamber wall of the second active chamber 7-5 is provided with the second oil transportation hole 7-6, and the chamber wall of counterweight chamber 7-8 is provided with counterweight oil transportation hole 7-7.
The composite hydraulic cylinder that present embodiment provides, design by counterweight chamber 7-8 comes to be the lift device counterweight, substituted the effect of mechanical counterweight, simplified the counter weight device of hoisting system greatly, make whole hoisting system simple in structure, be easy to install, thereby reduced the construction project amount, and it can be used in area low in the soil pressure-bearing, that foundation construction is difficult, engineering practicability is strong.
Be connected with pipeline road for convenience, the first oil transportation hole 7-10 of present embodiment is located on the casing wall of fixing column plug cylinder 7-4 upper end, communicates with the first active chamber 7-9; Non-movable piston 7-1 is a hollow-core construction, and the second oil transportation hole 7-6 is located on the base 7-11, and communicates with the hollow of non-movable piston 7-1; Counterweight oil transportation hole 7-7 is located on the casing wall of fixing column plug cylinder 7-4 lower end, and communicates with counterweight chamber 7-8.
Present embodiment provides a kind of electric-hydraulic proportion hoisting system, the composite hydraulic cylinder that the composite hydraulic cylinder that adopts in the described system provides for embodiment 1.
See figures.1.and.2, a kind of electric-hydraulic proportion hoisting system, comprise working connection oil hydraulic pump 1, working connection oil hydraulic pump 1 is connected with first one-way valve 3 by petroleum pipeline, first one-way valve 3 is connected with electrohydraulic proportional directional valve 6, described system comprises two composite hydraulic cylinders 7, the first active chamber 7-9 of two composite hydraulic cylinders 7 is connected with first output terminal of electrohydraulic proportional directional valve 6, the second active chamber 7-5 of two composite hydraulic cylinders 7 is connected with second output terminal of electrohydraulic proportional directional valve 6, the sealing end of the mobile piston cylinder 7-3 of composite hydraulic cylinder 7 is connected with lifting frame 15, the counterweight oil transportation hole 7-7 of composite hydraulic cylinder 7 is connected with hydraulic accumulator 12, hydraulic accumulator 12 is connected with second one-way valve 9, and second one-way valve 9 is connected with repairing oil hydraulic pump 8.Two composite hydraulic cylinders 7 equate with the central shaft distance of lifting frame 15 in the hoisting system of present embodiment, treat that lift device is positioned at the central axis of lifting frame 15.
Described when treating the up work of lift device: electrohydraulic proportional directional valve 6 switches to described second output terminal, working connection oil hydraulic pump 1 by pipeline road through first one-way valve 3, electrohydraulic proportional directional valve 6 is to the second active chamber 7-5 fuel feeding of composite hydraulic cylinder 7, the mobile piston cylinder 7-3 of composite hydraulic cylinder 7 drives mobile piston 7-2 and moves up, hydraulic accumulator 12 releases energy simultaneously, to the counterweight chamber of composite hydraulic cylinder 7 7-8 fuel feeding, promoting mobile piston 7-2 moves up, mobile piston cylinder 7-3 drives lifting frame 15 and moves up, thereby the described lift device for the treatment of of lifting frame 15 drives is up.
Described when treating the lift device downlink working:
Electrohydraulic proportional directional valve 6 switches to described first output terminal, working connection oil hydraulic pump 1 is by first one-way valve 3, the electrohydraulic proportional directional valve 6 first active chamber 7-9 fuel feeding to composite hydraulic cylinder 7, the mobile piston 7-2 of composite hydraulic cylinder 7 moves down, oil among the counterweight chamber 7-8 of composite hydraulic cylinder 7 flows back to hydraulic accumulator 12 simultaneously, mobile piston 7-2 pulling mobile piston cylinder 7-3 moves down, thereby the described lift device for the treatment of of lifting frame 15 drives is descending.This moment, the oil pressure in the hydraulic accumulator 12 raise, and absorbed energy, described when treating that lift device is up hydraulic accumulator 12 release energy, can reduce the installed power of hoisting system significantly, reach energy-saving effect.
The electric-hydraulic proportion hoisting system that present embodiment provides, combine with hydraulic accumulator 12 by the composite hydraulic cylinder 7 that will have counterweight chamber 7-8, substitute the effect of mechanical counterweight, make hoisting system simple in structure, be easy to install, thereby reduced the construction project amount, the area that it can be low in the soil pressure-bearing, foundation construction is difficult is used, and the electric-hydraulic proportion hoisting system has up-downgoing adjustable-speed, commutation and has reduced advantages such as the installed power of hoisting system and energy consumption and engineering practicability are strong steadily, significantly simultaneously.
Embodiment 3
Present embodiment is based on embodiment 2, is with embodiment 2 difference:
The lift device for the treatment of of present embodiment is a rod pumping pump, and described rod pumping pump comprises sucker rod 14, takes out sucker rod 14 lower ends and is connected with oil well pump 13, and beam hanger 14 upper ends are connected with lifting frame 15.The electric-hydraulic proportion hoisting system that present embodiment provides, combine with hydraulic accumulator 12 by the composite hydraulic cylinder 7 that will have counterweight chamber 7-8, substitute the effect of mechanical counterweight, make described rod pumping pump hoisting system simple in structure, be easy to install, thereby reduced the construction project amount, make the area that it can be low in the soil pressure-bearing, foundation construction is difficult, comprise in the offshore oil exploitation and using.
But for the stroke jig frequency step-less adjustment that makes the electric-hydraulic proportion hoisting system, regulate up-downgoing speed and make commutation more steady more easily, the electric-hydraulic proportion hoisting system of present embodiment also comprises displacement controller 19, and displacement controller 19 is made up of adder 17 and displacement signal output unit 18.The displacement signal output unit 18 that present embodiment adopted is computer, but is not used in restriction the present invention, and displacement signal output unit 18 can also be devices such as PLC (Programmable Logic Controller, programmable controller) or single-chip microcomputer.
The input end of displacement transducer 16 is connected with sucker rod 14, the output terminal of displacement transducer 16 is connected with the input end of adder 17, the input end of adder 17 also is connected with displacement signal output unit 18, and the output terminal of adder 17 is connected with electrohydraulic proportional directional valve 6.Displacement transducer 16 detects the displacement of sucker rod 14, displacement signal is outputed to adder 17, adder 17 is obtained the displacement setting signal of displacement signal output unit 18 outputs simultaneously, described displacement setting signal is by Programming with Pascal Language software the time dependent displacement diagram of displacement to be stored in the displacement signal output unit 18, the different shift value that displacement signal output unit 18 is exported in the different time according to the described displacement diagram of storage, described displacement setting signal in the present embodiment is stored in the computer by the C language, but be not limited to the present invention, described displacement setting signal can also pass through C++, VB, configuration software or LABVIEW graphical programming software realize.The described displacement setting signal of adder 17 usefulness deducts described displacement signal and obtains deviation signal, and described deviation signal outputed to electrohydraulic proportional directional valve 6, electrohydraulic proportional directional valve 6 is according to described deviation signal work, thereby realized that the described lift device for the treatment of moves according to the displacement diagram of setting in the displacement signal output unit 18, control the described lift device displacement for the treatment of according to different described displacement diagrams, just can obtain different up-downgoing speed, and the step-less adjustment of realization rod pump stroke jig frequency, by adjusting described displacement diagram, use rational displacement diagram effectively to control rod pump and steadily commutate.
In order better to control the fuel transfer pressure of pipeline road, be provided with first relief valve 2 between first one-way valve 3 and the working connection oil hydraulic pump 1, be provided with second relief valve 10 between the hydraulic accumulator 12 and second one-way valve 9, adjust the pipeline fuel transfer pressure by relief valve.
Be provided with first safety valve 4 between the electrohydraulic proportional directional valve 6 and first one-way valve 3, when oil transportation is transshipped, open first safety valve, 4 overflows unloading, play the effect of protection downstream instrument and equipment; Be provided with second safety valve 11 between the hydraulic accumulator 12 and second one-way valve 9; when repairing oil hydraulic pump 8 passes through second one-way valve 9 to hydraulic accumulator 12 repairings; if hydraulic accumulator 12 overloads are then by second safety valve, 11 overflow unloading protecting hydraulic accumulators 12.
In order to prevent that electric-hydraulic proportion one-way valve 6 from being stopped up by the impurity in the fluid of flowing through, and also is provided with accurate filter 15 between the electric-hydraulic proportion one-way valve 6 and first one-way valve 3.
Partial content in the technological scheme that above embodiment provides can realize that its software program is stored in the storage medium that can read by software programming, storage medium for example: the hard disk in the computer, CD or floppy disk.
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. composite hydraulic cylinder is characterized in that:
Comprise the fixing column plug cylinder, the top of described fixing column plug cylinder is provided with breach, the bottom of described fixing column plug cylinder is connected with base, described base is provided with non-movable piston, described non-movable piston is located in the described fixing column plug cylinder, form chuck with described fixing column plug cylinder, be provided with mobile piston in the described chuck;
The upper surface of described mobile piston is connected with the opening end of mobile piston cylinder, and the sealing end of described mobile piston cylinder passes described breach;
Form first active chamber between described mobile piston cylinder, described mobile piston and the described fixing column plug cylinder three, form second active chamber between described mobile piston cylinder, described mobile piston and the described non-movable piston three, form the counterweight chamber between described mobile piston, described non-movable piston, described fixing column plug cylinder and the described base;
The chamber wall of described first active chamber is provided with the first oil transportation hole, and the chamber wall of described second active chamber is provided with the second oil transportation hole, and the chamber wall in described counterweight chamber is provided with counterweight oil transportation hole.
2. composite hydraulic cylinder according to claim 1 is characterized in that: the described first oil transportation hole is located on the described fixing column plug cylinder, and communicates with described first active chamber.
3. composite hydraulic cylinder according to claim 1 is characterized in that: described non-movable piston is a hollow-core construction, and the described second oil transportation hole is located on the described base, and with described hollow communicating.
4. composite hydraulic cylinder according to claim 1 is characterized in that: described counterweight oil transportation hole is located on the described fixing column plug cylinder, and communicates with described counterweight chamber.
5. an electric-hydraulic proportion hoisting system comprises the working connection oil hydraulic pump, and described working connection oil hydraulic pump is connected with first one-way valve, and described first one-way valve is connected with electrohydraulic proportional directional valve, it is characterized in that:
Also comprise two composite hydraulic cylinders, first active chamber of described composite hydraulic cylinder is connected with described electrohydraulic proportional directional valve with second active chamber, the sealing end of the mobile piston cylinder of described composite hydraulic cylinder is connected with lifting frame, and the counterweight oil transportation hole of described composite hydraulic cylinder is connected with hydraulic accumulator;
Described hydraulic accumulator is connected with second one-way valve, and described second one-way valve is connected with the repairing oil hydraulic pump;
Two described composite hydraulic cylinders equate with the central shaft distance of described lifting frame, treat that lift device is positioned at the central axis of described lifting frame.
6. electric-hydraulic proportion hoisting system according to claim 5, it is characterized in that, also comprise displacement transducer, the input end of described displacement transducer is connected with the described lift device for the treatment of, the output terminal of described displacement transducer is connected with the input end of adder, the input end of described adder also is connected with the displacement signal output unit, and the output terminal of described adder is connected with described electrohydraulic proportional directional valve.
7. electric-hydraulic proportion hoisting system according to claim 5, it is characterized in that the described lift device for the treatment of is a rod pumping pump, described rod pumping pump comprises sucker rod, described sucker rod lower end is connected with oil well pump, and described sucker rod upper end is connected with described lifting frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206025781U CN201874918U (en) | 2010-11-09 | 2010-11-09 | Composite hydraulic cylinder and electro-hydraulic proportional lifting system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206025781U CN201874918U (en) | 2010-11-09 | 2010-11-09 | Composite hydraulic cylinder and electro-hydraulic proportional lifting system thereof |
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| CN201874918U true CN201874918U (en) | 2011-06-22 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900400A (en) * | 2012-09-21 | 2013-01-30 | 浙江大学 | Compact hydraulic oil pumping machine adopting composited pneumatic-hydraulic cylinder |
| CN103061718A (en) * | 2013-01-05 | 2013-04-24 | 无锡市科优液压设备制造有限公司 | Dual-plunger cylinder type hydraulic pumping unit |
| CN103061717A (en) * | 2013-01-05 | 2013-04-24 | 无锡市科优液压设备制造有限公司 | Four-cylinder type hydraulic pumping unit |
| CN103075133A (en) * | 2013-01-05 | 2013-05-01 | 无锡市科优液压设备制造有限公司 | Flow compensation type hydraulic pumping unit |
| CN103670343A (en) * | 2013-12-20 | 2014-03-26 | 王钰 | Hydraulic oil pumping drive device |
| CN105523508A (en) * | 2015-12-29 | 2016-04-27 | 太原理工大学 | Control loop of forklift working device |
| CN109882457A (en) * | 2019-04-08 | 2019-06-14 | 长沙理工大学 | A kind of energy-regenerating system of combined type hydraulic cylinder |
-
2010
- 2010-11-09 CN CN2010206025781U patent/CN201874918U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900400A (en) * | 2012-09-21 | 2013-01-30 | 浙江大学 | Compact hydraulic oil pumping machine adopting composited pneumatic-hydraulic cylinder |
| CN103061718A (en) * | 2013-01-05 | 2013-04-24 | 无锡市科优液压设备制造有限公司 | Dual-plunger cylinder type hydraulic pumping unit |
| CN103061717A (en) * | 2013-01-05 | 2013-04-24 | 无锡市科优液压设备制造有限公司 | Four-cylinder type hydraulic pumping unit |
| CN103075133A (en) * | 2013-01-05 | 2013-05-01 | 无锡市科优液压设备制造有限公司 | Flow compensation type hydraulic pumping unit |
| CN103061717B (en) * | 2013-01-05 | 2015-09-02 | 无锡市科优液压设备制造有限公司 | A kind of four cylinder type hydraulic oil pumps |
| CN103670343A (en) * | 2013-12-20 | 2014-03-26 | 王钰 | Hydraulic oil pumping drive device |
| CN105523508A (en) * | 2015-12-29 | 2016-04-27 | 太原理工大学 | Control loop of forklift working device |
| CN105523508B (en) * | 2015-12-29 | 2017-09-22 | 太原理工大学 | A kind of control loop of fork truck working device |
| CN109882457A (en) * | 2019-04-08 | 2019-06-14 | 长沙理工大学 | A kind of energy-regenerating system of combined type hydraulic cylinder |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20110622 |