CN102140896A - Multi-hydraulic cylinder electric energy-accumulation well repairing machine with energy accumulator - Google Patents

Multi-hydraulic cylinder electric energy-accumulation well repairing machine with energy accumulator Download PDF

Info

Publication number
CN102140896A
CN102140896A CN2011100232363A CN201110023236A CN102140896A CN 102140896 A CN102140896 A CN 102140896A CN 2011100232363 A CN2011100232363 A CN 2011100232363A CN 201110023236 A CN201110023236 A CN 201110023236A CN 102140896 A CN102140896 A CN 102140896A
Authority
CN
China
Prior art keywords
energy
accumulator
workover rig
lifting
fluid cylinders
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011100232363A
Other languages
Chinese (zh)
Inventor
王树龙
谈献英
王晓林
史永庆
刘世峰
刘炜
顾芳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CNPC Bohai Equipment Manufacturing Co Ltd
Original Assignee
CNPC Bohai Equipment Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CNPC Bohai Equipment Manufacturing Co Ltd filed Critical CNPC Bohai Equipment Manufacturing Co Ltd
Priority to CN2011100232363A priority Critical patent/CN102140896A/en
Publication of CN102140896A publication Critical patent/CN102140896A/en
Pending legal-status Critical Current

Links

Abstract

The invention relates to a multi-hydraulic cylinder electric energy-accumulation well repairing machine with an energy accumulator. The well repairing machine comprises an energy supplying unit, an executing unit, the energy accumulator and a speed regulating unit, wherein the executing unit is used for executing load lifting in well repairing operation within a pure lifting time; the energy accumulator is connected with the energy supplying unit and used for accumulating energy supplied by the energy supplying unit within an auxiliary time and releasing the accumulated energy within the pure lifting time; and the speed regulating unit is arranged between the energy supplying unit and the executing unit and used for controlling the well repairing machine in a working state or an unloading state and regulating the lifting speed of the executing unit. The well repairing machine can accumulate the energy within 2/3-3/4 of the time without the lifting operation in the whole lifting period, a power transmission path of the well repairing machine is changed into a path of motor-energy accumulator-executing mechanism, and the well repairing machine can meet the requirements of large-load and high-speed lifting of the executing mechanism without increasing additional energy supply so that the assembling power of the complete set of equipment is reduced.

Description

The electronic energy-storing workover rig of many fluid cylinders that has accumulator
Technical field
The invention belongs to the workover rig technical field of oil field construction, relate in particular to a kind of electronic energy-storing workover rig of many fluid cylinders that has accumulator.
Background technology
Workover treatment is a necessary part in the oil development process, and capital equipment wherein is to be used to the workover rig that promotes in workover treatment.The major function of workover rig is to finish the lifting operation, comprises prime mover, speed change system, Hoisting System, control system etc., and said system is installed on the chassis special car, forms the petroleum special equipment with high mobility.Its key operation function is the lifting of finishing tubing string in the well and transfer.The executing agency commonly used that finishes the workover rig enhanced feature at present has two kinds, and the one, the fast line on the winch is connected with fixed pulley group (overhead traveling crane) on the derrick, drives running block (tourist bus) and finishes and hoist and transfer.The prime mover that drives winch can be motor or diesel engine.Another kind is to finish by the extraordinary oil cylinder of hydraulic pump drive to hoist and transfer operation, and the prime mover that drives hydraulic pump can be divided into motor and diesel engine.In use, the energy consumption cost of the workover rig of supplying with as prime energy as motive workover rig (common workover rig) with electric energy with diesel engine (electric workover rig) has very big difference, and the energy consumption cost of electric workover rig only accounts for about 1/3 of common workover rig.The reason that causes this result is the acting principle decision of internal combustion engine, and 42MJ/kg carries out inference by the diesel engine mean calorie, and diesel engine approximately has only the energy about 30%~40% to change mechanical energy in conversion process of energy.Adopt motor as motive power, generally speaking, the electric energy more than 80% converts mechanical energy to.Therefore,, reduce toxic emission, have diesel engine to change motor into the original driving force of workover rig for the basic usefulness that cuts down the consumption of energy, just become energy-conservation, reduce discharging, the important channel of joint.
But, only adopt the workover rig of motor because be to supply with as prime energy with electric energy, what need most solution is exactly the equal transformer matching problem of electric power and well.Because of existing workover rig is directly to drive executing agency, this just requires to be equipped with more powerful prime mover, is 40 tons workover rig as rated load, and its prime mover is equipped with power need reach 200kw.Tend to exceed the capacity of transformer like this, but, will have the defective that equipment cost rises and use is inconvenient as if other matching transformer.
Summary of the invention
First purpose of the present invention provides a kind of electronic energy-storing workover rig of many fluid cylinders that has accumulator, and expense can cut down the consumption of energy.
Second purpose of the present invention provides a kind of electronic energy-storing workover rig of many fluid cylinders that has accumulator, can improve the generalization degree of equipment, reduces manufacturing cost.
The technical scheme that realizes the object of the invention is:
The electronic energy-storing workover rig of many fluid cylinders that has an accumulator has lifting duty cycle, and each promotes and comprises net hoisting time and non-cutting time duty cycle.Workover rig comprises: supply unit provides the energy to workover rig; Performance element is carried out the Load lifting in the workover treatment in net hoisting time; Promoting in duty cycle, supply unit remains operating condition; Workover rig also comprises: accumulator, be connected with supply unit, and in non-cutting time, store the energy that supply unit provides, in net hoisting time, discharge energy stored; And the speed governing unit, be arranged between supply unit and the performance element, control the in running order or unloading condition of workover rig, and the hoisting velocity of performance element is regulated.
Supply unit comprises motor and/or diesel engine, and the hydraulic pump that is connected with motor and/or diesel engine.
Accumulator is piston accumulator or capsule-type accumulator, is connected with the hydraulic pump of supply unit.
Performance element comprises interconnective successively a plurality of fluid cylinders, pulley system and hook block.
The speed governing unit comprises at least: control valve, the in running order or unloading condition of control workover rig; And a plurality of reversal valves, its quantity is identical with the fluid cylinder quantity of performance element, and reversal valve and fluid cylinder are corresponding one by one interconnects rising with the control fluid cylinder respectively, stops or transferring.
The speed governing unit also comprises the overflow valve that liquid-way system is carried out pressure adjusting and control.
A plurality of fluid cylinders are parallel with one another.
Fluid cylinder is 2, and 2 fluid cylinders move simultaneously and can obtain maximum pulling capacity.
Have only a fluid cylinder action can obtain maximum lift speed in 2 fluid cylinders.
The beneficial effect that the present invention has compared with the prior art is:
1, owing to increased accumulator, make energy transmit with the route of " motor--accumulator--executing agency ", can be under the prerequisite of guaranteeing the operation timeliness, realize the input power multiplication of workover rig system, realize that energy-conservation, the expense that cuts down the consumption of energy is more than 50%.
2, owing to increased accumulator, do not need to increase energy supply, thereby reduce the installed power of complete equipment.
3, owing to reduced the installed power of complete equipment, making only has electric power system can satisfy the instructions for use of most of workover rig, such as using for oil pumper under the situation in the well site that is equipped with, still can use workover rig of the present invention, make that like this workover rig of the present invention is applied widely, popularizing application prospect good.
Workover rig of the present invention commutates to the biliquid cylinder by two reversal valves and controls and speed governing, and system is simple and reliable; And the versatility of fluid cylinder own is good, standardization is high, can reduce the cost of complete equipment.
The energy device of workover rig of the present invention both can adopt motor, also can adopt diesel engine, perhaps be that main diesel engine driving hydraulic pump is auxilliary with the motor, when satisfying condition of power supply, the well site adopt electricity to drive, if the well site does not possess condition of power supply, then adopt Diesel Driven, can make equipment when realization is energy-conservation, have compliance widely.
Description of drawings
Fig. 1 is for having the functional block diagram of the electronic energy-storing workover rig of many fluid cylinders of accumulator in the one embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing and with the specific embodiment is example, and the present invention is described in detail.But what those skilled in the art should know is to the invention is not restricted to the listed specific embodiment, as long as spirit according to the invention all should be included in protection scope of the present invention.
Principle of the present invention is: promote operating mode required power maximum in workover treatment, and in a complete lifting cycle, net hoisting time only accounts for 1/4~1/3 of the whole lifting cycle.Based on above characteristics, the present invention adopts the hydraulic energy-accumulating technology, has increased accumulating mechanism, the power transmission path of workover rig can be become motor--accumulator--executing agency.Do not implement in the whole lifting cycle to promote in time of 2/3~3/4 of operation, utilize less relatively motor to provide energy, provide energy to executing agency by accumulator to accumulator; And in accounting for 1/4~1/3 the net hoisting time in whole lifting cycle, satisfy big load, promote the energy of needs at a high speed owing to stored in the accumulator, discharge energy in the accumulator and just can realize high speed lifting weight in the well.Workover rig of the present invention like this can be realized executing agency and PD, satisfies the needs of operation timeliness.
For having the functional block diagram of the electronic energy-storing workover rig of many fluid cylinders of accumulator in the one embodiment of the invention, the electronic energy-storing workover rig of many fluid cylinders that has accumulator of the present invention mainly comprises following a few big unit as Fig. 1:
Supply unit 100 provides the energy to whole workover rig, and supply unit 100 comprises motor 101 and hydraulic pump 102 in the embodiment shown in fig. 1, thereby motor 101 is connected to original driving force is provided in the electric power system of well site, drives hydraulic pumps 102 by motor 101.
In other embodiments, also can change motor 101 into diesel engine, pass through power switching device, realize the driving of diesel engine to hydraulic pump 102, do not have electrical machine energy-saving though do like this, can significantly reduce the installed power requirement yet, realize the purpose that cuts down the consumption of energy.In a further embodiment, the prime mover that can also make workover rig is based on motor, the Diesel Driven hydraulic pump is auxilliary, when satisfying condition of power supply, the well site adopt electricity to drive, if the well site does not possess condition of power supply, then adopt Diesel Driven, can make equipment when realization is energy-conservation, have compliance widely.
Accumulator 200, this device is the present invention's initiative, because in a complete lifting duty cycle, net hoisting time only accounts for 1/4~1/3 of the whole lifting cycle, the effect of accumulator be in the lifting cycle the discharging tubing string, in non-cutting time such as shackle, utilize motor 101 to drive ceaselessly storage power in accumulator of hydraulic pumps.It is that maximum pressure and system's maximum pressure of accumulator adapts that its complete sets of Techniques requires, and it is catabiotic 80% that energy stored can satisfy the pure operation that hoists in subsidiary operation time, and its form of structure can be piston type, also can be capsule-type.Accumulator 200 is connected with the hydraulic pump 102 of supply unit 100, provides energy by hydraulic pump 102 to accumulator 200.
Speed governing unit 300, speed governing unit 300 comprise control valve 301, overflow valve 302, reversal valve 303 and reversal valve 304, and the effect of overflow valve 302 is liquid-way system to be carried out pressure regulate and control.Wherein the effect of control valve 301 is that the workover rig system mode is controlled, and makes the in running order or unloading condition of workover rig system.The effect of reversal valve 303 is that control fluid cylinder 401 rises, stops or transferring.The effect of reversal valve 304 is that control fluid cylinder 402 rises, stops or transferring.
Performance element 400 comprises fluid cylinder 401 and fluid cylinder 402 and pulley system 403, hook block 404.Fluid cylinder 401 is connected with reversal valve 304 with reversal valve 303 respectively with fluid cylinder 402 and controlled by it.Pulley system 403 and hook block 404 are used for finishing the Load lifting of workover treatment.
By the switching that is arranged in parallel and passes through valve 303 and valve 304 of fluid cylinder 401 and fluid cylinder 402, but make both single movements of fluid cylinder 401 and fluid cylinder 402, also can move simultaneously, realize the speed governing of pulley system 403 and hook block 404.For example,, can obtain maximum lift speed,, can obtain maximum pulling capacity, be applicable to that moderate duty promotes during fluid cylinder 402 actions if when fluid cylinder 401 and fluid cylinder 402 move simultaneously if when having only fluid cylinder 401 action.The concrete size of fluid cylinder promotes load according to workover rig and system works pressure is determined.
In other embodiments of the invention, can also adopt more a plurality of fluid cylinder parallel connections, more accurately to realize many grades of speed governing.The quantity of fluid cylinder should be identical with the reversal valve quantity in the speed governing unit 300, and reversal valve interconnects respectively with fluid cylinder is corresponding one by one.
Adopt the purpose of biliquid cylinder or many fluid cylinders to be not increase under the prerequisite of power of motor, speed governing is to satisfy job requirements easily.Compare as executing agency with adopting the combination fluid cylinder in the conventional art, executing agency of the present invention versatility is better, and manufacturing cost is lower.
Below by a specific embodiment operating principle of the present invention is described.
Referring to Fig. 1.The present invention has the electronic energy-storing workover rig of many fluid cylinders of accumulator can realize top gear and two kinds of operations of low or first gear.In order to control convenience, reliable, top gear or low or first gear operation only start one of them fluid cylinder of biliquid cylinder respectively.Operate for top gear: control valve 301 switches to right position, and reversal valve 303 switches to meta, and this moment, fluid cylinder 401 remained static.Reversal valve 304 switches to position, a left side, and to the cavity of resorption fuel feeding of fluid cylinder 402, the piston rod that promotes fluid cylinder 402 is up, drives hook block 404 and moves upward with the speed that doubles fluid cylinder 402 piston rods, finishes fast lifting.Under the situation of other control valve invariant position, just reversal valve 304 is switched to right position, the hydraulic oil of fluid cylinder 402 cavity of resorptions can flow back to fuel tank, under the effect of gravity, finishes hook block 404 and transfers.
Operate for low or first gear: control valve 301 switches to right position, earlier reversal valve 304 is switched to position, a left side, again reversal valve 304 is switched to meta after making the piston rod of fluid cylinder 402 be in a high position, makes the piston rod of fluid cylinder 402 static.Reversal valve 303 is switched to position, a left side, and to the epicoele fuel feeding of fluid cylinder 401, it is up to drive hook block 404, finishes lifting.Under the situation of other control valve invariant position, reversal valve 303 is switched to right position, the hydraulic oil of fluid cylinder 401 epicoeles can flow back to fuel tank, and realization hook block 404 is transferred under the effect of gravity.Because this process does not have the multiplication mechanism of oil cylinder and assembly pulley, has realized the low or first gear lifting.
More than be in the workover treatment process, a top gear or the low or first gear operation when promoting pure lifting the in the cycle period.In a complete lifting duty cycle, remove and finish pure lifting and do out of tradely, also to finish shackle, discharging tubing string, hollow hook lowering, remove less important work such as elevator.Complete lifting operation of the common composition of pure lifting operation and less important work, i.e. complete lifting operation comprises lifting tubing string, shackle, discharging tubing string, hollow hook lowering, removes the elevator full content.In a complete lifting operation process, motor 101 keeps operating condition always, and accumulator 200 and hydraulic pump 102 pass through control valve 301 to executing agency's feed flow.Realize the commutation control and the speed of executing agency are regulated by reversal valve 303 and reversal valve 304,402 different combinations realize different speed--Load Regulation with fluid cylinder by fluid cylinder 401.
By above description as can be known, workover rig of the present invention is by being provided with accumulator, the motor power of will not implementing to promote in the whole lifting cycle in time of 2/3~3/4 of operation is stored in the accumulator, discharge in 1/4~1/3 work period of operation and wait executing agency to promote, thereby realized the PD of executing agency, make the present invention under the prerequisite that reduces the motor power (output) outfit, guarantee the operation timeliness, and then partly substitute or the replacing whole diesel engine with motor, not only can reach purpose of energy saving but also avoided environment pollution, meet the requirement of environmental protection operation.On the other hand, reduce the capacity requirement that motor power (output) can also reduce the equal transformer of well of transmitting electricity to the workover rig motor significantly, make and use the equal transformer of well of equipment also can satisfy the workover rig instructions for use as oil pumper, improve the generalization level of equipment, significantly reduced manufacturing cost.
Simultaneously, workover rig of the present invention has also adopted the operator scheme of two grades of the high low speed of biliquid cylinder or more grades, makes under the prerequisite that does not increase power of motor, operate easier accurately, be easy to control.
It should be noted that the foregoing description is example and unrestricted the present invention, those skilled in the art can design a lot of alternate embodiments and not break away from the scope of claims.

Claims (9)

1. electronic energy-storing workover rig of many fluid cylinders that has accumulator has lifting duty cycle, and each described lifting comprises net hoisting time and non-cutting time duty cycle, and described workover rig comprises:
Supply unit provides the energy to described workover rig; And
Performance element is carried out the Load lifting in the workover treatment in described net hoisting time;
It is characterized in that: in described lifting duty cycle, described supply unit remains operating condition;
Described workover rig also comprises:
Accumulator is connected with described supply unit, stores the energy that described supply unit provides in described non-cutting time, discharges energy stored in described net hoisting time; And
The speed governing unit is arranged between described supply unit and the described performance element, controls the in running order or unloading condition of described workover rig, and the hoisting velocity of described performance element is regulated.
2. have the electronic energy-storing workover rig of many fluid cylinders of accumulator according to claim 1, it is characterized in that: described supply unit comprises motor and/or diesel engine and the hydraulic pump that is connected with described motor and/or diesel engine.
3. have the electronic energy-storing workover rig of many fluid cylinders of accumulator as claimed in claim 1 or 2, it is characterized in that: described accumulator is piston accumulator or capsule-type accumulator, is connected with the hydraulic pump of described supply unit.
4. as having the electronic energy-storing workover rig of many fluid cylinders of accumulator as described in the claim 3, it is characterized in that: described performance element comprises interconnective successively a plurality of fluid cylinders, pulley system and hook block.
5. as having the electronic energy-storing workover rig of many fluid cylinders of accumulator as described in the claim 4, it is characterized in that: described speed governing unit comprises at least:
Control valve is controlled the in running order or unloading condition of described workover rig; And
A plurality of reversal valves, its quantity is identical with the fluid cylinder quantity of described performance element, and described reversal valve and described fluid cylinder correspondingly one by one interconnect with the rising of controlling described fluid cylinder respectively, stop or transferring.
6. as having the electronic energy-storing workover rig of many fluid cylinders of accumulator as described in the claim 4, it is characterized in that: described speed governing unit also comprises and liquid-way system is carried out pressure is regulated and the overflow valve of control.
7. as having the electronic energy-storing workover rig of many fluid cylinders of accumulator as described in the claim 5, it is characterized in that: described a plurality of fluid cylinders are parallel with one another.
8. as having the electronic energy-storing workover rig of many fluid cylinders of accumulator as described in the claim 7, it is characterized in that: described fluid cylinder is 2, and described 2 fluid cylinders move simultaneously and can obtain maximum pulling capacity.
9. as having the electronic energy-storing workover rig of many fluid cylinders of accumulator as described in the claim 7, it is characterized in that: have only a fluid cylinder action can obtain maximum lift speed in described 2 fluid cylinders.
CN2011100232363A 2011-01-20 2011-01-20 Multi-hydraulic cylinder electric energy-accumulation well repairing machine with energy accumulator Pending CN102140896A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100232363A CN102140896A (en) 2011-01-20 2011-01-20 Multi-hydraulic cylinder electric energy-accumulation well repairing machine with energy accumulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100232363A CN102140896A (en) 2011-01-20 2011-01-20 Multi-hydraulic cylinder electric energy-accumulation well repairing machine with energy accumulator

Publications (1)

Publication Number Publication Date
CN102140896A true CN102140896A (en) 2011-08-03

Family

ID=44408662

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011100232363A Pending CN102140896A (en) 2011-01-20 2011-01-20 Multi-hydraulic cylinder electric energy-accumulation well repairing machine with energy accumulator

Country Status (1)

Country Link
CN (1) CN102140896A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102704897A (en) * 2012-06-25 2012-10-03 施伟 Gravitational equilibrium hydraulic pressure long stroke pumping unit
CN103807238A (en) * 2014-03-10 2014-05-21 徐工集团工程机械股份有限公司 Hydraulic control feeding system and hydraulic control feeding method
CN103821464A (en) * 2013-11-12 2014-05-28 山东科瑞石油装备有限公司 Tubing string vertical vehicular full-automatic smart hydraulic workover rig

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1057088A (en) * 1991-02-11 1991-12-18 胜利石油管理局钻井工艺研究院 Hydraulic energy accumulation petroleum workover rig
US5390747A (en) * 1992-12-10 1995-02-21 Drilling Technology Research Institute Of Shengli Oilfield Well rig lift system and a hydraulic energy-storing well rig lift system
WO1995014173A1 (en) * 1993-11-18 1995-05-26 Pressmaster Tool Ab Hydraulic power unit
CN201013263Y (en) * 2006-12-15 2008-01-30 刘华伟 Portable intelligent petroleum oil workover rig
CN201963219U (en) * 2011-01-20 2011-09-07 中国石油集团渤海石油装备制造有限公司 Multi-hydraulic cylinder electric energy-accumulating workover rig with energy accumulator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1057088A (en) * 1991-02-11 1991-12-18 胜利石油管理局钻井工艺研究院 Hydraulic energy accumulation petroleum workover rig
US5390747A (en) * 1992-12-10 1995-02-21 Drilling Technology Research Institute Of Shengli Oilfield Well rig lift system and a hydraulic energy-storing well rig lift system
WO1995014173A1 (en) * 1993-11-18 1995-05-26 Pressmaster Tool Ab Hydraulic power unit
CN201013263Y (en) * 2006-12-15 2008-01-30 刘华伟 Portable intelligent petroleum oil workover rig
CN201963219U (en) * 2011-01-20 2011-09-07 中国石油集团渤海石油装备制造有限公司 Multi-hydraulic cylinder electric energy-accumulating workover rig with energy accumulator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102704897A (en) * 2012-06-25 2012-10-03 施伟 Gravitational equilibrium hydraulic pressure long stroke pumping unit
CN102704897B (en) * 2012-06-25 2014-07-02 施伟 Gravitational equilibrium hydraulic pressure long stroke pumping unit
CN103821464A (en) * 2013-11-12 2014-05-28 山东科瑞石油装备有限公司 Tubing string vertical vehicular full-automatic smart hydraulic workover rig
CN103807238A (en) * 2014-03-10 2014-05-21 徐工集团工程机械股份有限公司 Hydraulic control feeding system and hydraulic control feeding method

Similar Documents

Publication Publication Date Title
CN101398017B (en) Hydraulic drive system with energy recuperation
CN101654915B (en) Excavator energy-recuperation system
CN108978775A (en) It is a kind of based on the excavator of flywheel series parallel type mechanical mixture dynamical system
CN107447803B (en) The mechanical mining excavator of combination drive
CN106761760A (en) The power shovel lifting system of electro-hydraulic combination drive
CN103896156A (en) Energy-saving hydraulic system for crane and crane
CN201963219U (en) Multi-hydraulic cylinder electric energy-accumulating workover rig with energy accumulator
CN102888876A (en) Energy regeneration structure of excavator and excavator
CN109797798A (en) A kind of excavator swing arm potential energy recycle and reuse system
CN103552457B (en) Oil/electric hybrid rotary drilling rig driving system
CN102140896A (en) Multi-hydraulic cylinder electric energy-accumulation well repairing machine with energy accumulator
CN107235440B (en) A kind of liquid electricity mixing energy conserving system for lifting mechanism
CN104452868B (en) Double-hydraulic-cylinder mixed drive control system
CN110512669A (en) A kind of excavator swing arm potential energy recovery system based on accumulator
CN108978774B (en) Series-parallel hybrid power system for excavator
CN101382047A (en) Tractor hoist with speed adjusted by super capacitance set storage type generator
CN109797797A (en) A kind of torque couple formula excavator swing arm potential energy recycle and reuse system
CN104695852B (en) There is the coal bed gas drilling machine of mixed power plant and multi-motor driving
CN109797799A (en) A kind of energy regenerating and reutilization system for excavator
CN103742490B (en) Mixed power pumping unit
CN103437392B (en) Hybrid power hydraulic excavator system and using method
CN201288721Y (en) Energy recovery system of mixed power single-valve multiple actuator assembly
CN107503395A (en) Throttling volume directly drives compound oil inlet and outlet independent control electrohydraulic system
CN209604334U (en) Movable arm potential energy energy regenerating and the system of utilizing
CN209603224U (en) Excavator swing arm energy recycling system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20110803