CN101230871A - Flywheel energy-accumulating type secondary regulation flux coupling system - Google Patents
Flywheel energy-accumulating type secondary regulation flux coupling system Download PDFInfo
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- CN101230871A CN101230871A CNA200810064038XA CN200810064038A CN101230871A CN 101230871 A CN101230871 A CN 101230871A CN A200810064038X A CNA200810064038X A CN A200810064038XA CN 200810064038 A CN200810064038 A CN 200810064038A CN 101230871 A CN101230871 A CN 101230871A
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Abstract
The invention discloses a flywheel energy storage type secondary flow regulation coupled system, which relates to a closed loop hydraulic control system, and the invention solves the problems of high power density, low energy density and high cost existing in the existing secondary regulation hydrostatic transmission system which adopts a hydraulic accumulator to store energy. Two output shafts of a double-shaft motor in the system are respectively connected with a drive shaft of the flywheel and a transmission shaft of a hydraulic pump or a motor, and a variable cylinder regulates the working position of a sloping plate of the hydraulic pump or the motor under the control of an electro-hydraulic control valve. An upper limit sensor and a lower limit sensor are respectively fixed at the side face of a piston rod of a hydraulic cylinder to measure the position of the piston rod, and signal output ends of the upper limit sensor and the lower limit sensor are respectively connected with a signal output end of a controller. A control signal output end of the controller is connected with the control signal output end of the electro-hydraulic control valve, and the invention is suitable for industries of oil, mine and engineering plant, etc., especially for the system of frequent reciprocating motion and frequent start-stop.
Description
Technical field
The present invention relates to a kind of closed loop hydraulic control system, be specifically related to the secondary flow-regulation coupling system.
Background technique
The traditional secondary regulation technology is meant in constant pressure network does not have the hydraulic transmission technology that throttling ground carries out closed loop control to hydraulic pump/motor.Because system works in accurate pressure constant state, is also referred to as CPS (CommonPressure System), CPR (Common Pressure Rail), or SCS (Secondary ControlledSystem), it is actual to be that the contact of pressure coupling is united.But this technology owing to have multi-load parallel connection, control characteristic good, can realize that advantages such as system's braking kinetic energy recovery cause increasing concern.But, the secondary adjusting hydrostatic transmission system that works in constant pressure network also has its drawback: system can only insert the rotation executive component of Variable quantity usually, can not insert can not variable rotation executive component (fixed displacement motor or swing cylinder) and straight line type executive component (straight line oil hydraulic cylinder).This is mainly by its working principle decision, because its pressure substantially constant, so can only realize the isoparametric control of speed, moment of torsion and power by the discharge capacity that changes executive component.Address the above problem, a kind of method is to introduce a kind of energy conversion component (hydraulic transformer) to realize above-mentioned functions in system, and at present external Sweden, Germany and Japan and Zhejiang University of China and Harbin Institute of Technology etc. are all being studied this; Another kind method is according to the load characteristic requirement, utilizes flux coupling contact system pressure with the characteristics that load changes, and secondary regulation technology and flux coupling is got in touch system combine, and sets up the quiet liquid transmission system of secondary flow-regulation coupling.
Described secondary flow-regulation coupling system is that the secondary regulation technology is got in touch combining of system with flux coupling, its objective is performance advantage separately, improves the control performance of system, and the possibility of energy recovery under some operating mode is provided simultaneously.The quiet liquid transmission system of secondary flow-regulation coupling is the expansion to the secondary adjusting hydrostatic transmission system that contact was united based on the pressure coupling originally, further enlarges the application of secondary adjusting hydrostatic drive technology.
At publication number is in the patent application document of " secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive " of CN101070864, a kind of hydrostatic drive by the hydraulic accumulator energy storage is disclosed, it solved exist in the existing secondary adjusting hydrostatic transmission system can only be in more among a small circle the constant pressure network that changes of authorized pressure with need be in the contradiction between the hydraulic accumulator energy recovery subtense angle of internal pressure variation in a big way, the specific power of hydraulic accumulator is big, can reach 19kW/kg, and energy density can only reach 2Wh/kg, and it is little not to be suitable for the required power density requirements, energy density requires bigger occasion; Be subjected to the hydraulic accumulator Effect on Performance, this installs the temperature limited of suitable working environment, and the cost of hydraulic accumulator that is adopted in this device and hydraulic pump/motor is all than higher.
Summary of the invention
In order to solve the existing problem that specific power is big, energy density is little and system cost is big that exists in the secondary adjusting hydrostatic transmission system of hydraulic accumulator energy storage that adopts, the invention provides a kind of flywheel energy-accumulating type secondary regulation flux coupling system.
Flywheel energy-accumulating type secondary regulation flux coupling system comprises dual-axle motor 3, hydraulic pump/motor 4, electro-hydraulic control valve 5, variable oil cylinder 6, reduction valve 7, oil hydraulic cylinder 10, upper limit sensor 11, lower limit sensor 12, controller 15 and fuel tank 13, and it also comprises flywheel 1; The live axle of flywheel 1 is fixedlyed connected with an output shaft of dual-axle motor 3, another output shaft of described dual-axle motor 3 is fixedlyed connected with the transmission shaft of hydraulic pump/motor 4, the swash plate 4-1 of hydraulic pump/motor 4 is connected with the piston rod of variable oil cylinder 6, two oil transportation mouths of described variable oil cylinder 6 are communicated with two oil transportation mouths of electro-hydraulic control valve 5 respectively, two oil transportation mouths in addition of described electro-hydraulic control valve 5 are communicated with the oil outlet of fuel tank 13 and reduction valve 7 respectively, the filler opening while of described reduction valve 7 and an oil transportation mouth of hydraulic pump/motor 4, an oil transportation mouth of oil hydraulic cylinder 10 is communicated with, another oil transportation mouth of described hydraulic pump/motor 4 and another oil transportation mouth of described oil hydraulic cylinder 10 all are communicated with fuel tank 13, the side that upper limit sensor 11 and lower limit sensor 12 are separately fixed at the piston rod of oil hydraulic cylinder 10 is used for detecting the position of described piston rod, distance between described upper limit sensor 11 and the lower limit sensor 12 is the working stroke of the piston rod of oil hydraulic cylinder 10, the signal output part of upper limit sensor 11 and lower limit sensor 12 is connected with the signal input part of controller 15 respectively, and the control signal output terminal of controller 15 is connected with the control signal input end of electro-hydraulic control valve 5.
System lost the mechanical kinetic energy that the potential energy that is converted into heat energy and kinetic energy are stored as flywheel when flywheel energy-accumulating type secondary regulation flux coupling system of the present invention can descend original load weight, and recycled, and reduced system's installed power, reduced system energy consumption; Adopt the element of flywheel, make the specific power of system can be 0.5～11.9kW/kg, and energy density can reach 5～150Wh/kg as energy storage, and the long service life of flywheel, be subjected to the temperature effect of working environment little; Only use a hydraulic pump/motor in the native system, reduced the cost of system greatly.
The present invention is applicable to industries such as oil, mine and engineering machinery, has broad application prospects.Be particularly useful in the system of type frequently reciprocating and frequent start-stop.
Description of drawings
Fig. 1 is a system construction drawing of the present invention, and Fig. 2 is an electrical structure schematic representation of the present invention.
Embodiment
Embodiment one: the flywheel energy-accumulating type secondary regulation flux coupling system of present embodiment is made up of dual-axle motor 3, hydraulic pump/motor 4, electro-hydraulic control valve 5, variable oil cylinder 6, reduction valve 7, oil hydraulic cylinder 10, upper limit sensor 11, lower limit sensor 12, fuel tank 13, controller 15 and flywheel 1; The live axle of flywheel 1 is fixedlyed connected with an output shaft of dual-axle motor 3, another output shaft of described dual-axle motor 3 is fixedlyed connected with the transmission shaft of hydraulic pump/motor 4, the swash plate 4-1 of hydraulic pump/motor 4 is connected with the piston rod of variable oil cylinder 6, two oil transportation mouths of described variable oil cylinder 6 are communicated with two oil transportation mouths of electro-hydraulic control valve 5 respectively, two oil transportation mouths in addition of described electro-hydraulic control valve 5 are communicated with the oil outlet of fuel tank 13 and reduction valve 7 respectively, an oil transportation mouth of the filler opening of described reduction valve 7 and hydraulic pump/motor 4, an oil transportation mouth of oil hydraulic cylinder 10 is communicated with, another oil transportation mouth of described hydraulic pump/motor 4 and another oil transportation mouth of described oil hydraulic cylinder 10 all are communicated with fuel tank 13, the side that upper limit sensor 11 and lower limit sensor 12 are separately fixed at the piston rod of oil hydraulic cylinder 10 is used for measuring the position of described piston rod, distance between described upper limit sensor 11 and the lower limit sensor 12 is the working stroke of the piston rod of oil hydraulic cylinder 10, the signal output part of upper limit sensor 11 and lower limit sensor 12 is connected with the signal input part of controller 15 respectively, and the control signal output terminal of controller 15 is connected with the control signal input end of electro-hydraulic control valve 5.
The discharge capacity of the hydraulic pump/motor 4 in the present embodiment is regulated by controlled variable oil cylinder 6 by electro-hydraulic control valve 5, and the pilot pressure of electro-hydraulic control valve 5 is provided through reduction valve 7 by hydraulic pump/motor 4 high pressure oils.
The flywheel energy-accumulating type secondary regulation flux coupling system of present embodiment is in practical application, the piston rod of oil hydraulic cylinder 10 is connected with load 14, in the course of the work, when the piston rod that detects oil hydraulic cylinder 10 when upper limit sensor 11 is in upper limit position, send a signal to controller 15, controller 15 control electro-hydraulic control valves 5 drive the swashplate angle Zero Crossing Point of the driveshaft drive hydraulic pump/motor 4 of variable oil cylinder 6, make hydraulic pump/motor 4 be converted to the motor operating mode; When limit sensors 12 piston rod that detects oil hydraulic cylinder 10 is in the lower position instantly, send a signal to controller 15,5 actions of controller 15 control electro-hydraulic control valves, the driveshaft that drives variable oil cylinder 6 drives the swash plate rotation of hydraulic pump/motor 4, makes hydraulic pump/motor 4 be transformed into the pump operating mode.
The working principle of the flywheel energy-accumulating type secondary regulation flux coupling system of present embodiment is, when dual-axle motor 3 drives hydraulic pump/motor 4 work, drive flywheel 1 rotation, when the power of load needs is smaller, since the revolutional slip of dual-axle motor 3, dual-axle motor 3 raising speeds, the surplus power that flywheel 1 absorbs dual-axle motor 3 outputs stores, when load needed bigger power, flywheel 1 and dual-axle motor 3 provided power to load simultaneously, increased the output power of system.
When load needs the bigger starting power or the situation of acceleration, the working procedure of the described flywheel energy-accumulating type secondary regulation flux coupling system of present embodiment is: before needs bigger starting power or acceleration, hydraulic pump/motor 4 is in the motor operating mode, rotate dual-axle motor 3 then and drive flywheel 1 acceleration energy storage, when needs drive power or acceleration, controller 15 drives the swash plate of the driveshaft drive hydraulic pump/motor 4 of variable oil cylinder 6 by control electro-hydraulic control valve 5, make hydraulic pump/motor 4 be converted to the pump operating mode, flywheel 1 and dual-axle motor 3 provide power to load simultaneously, at this moment, the rotating speed of dual-axle motor 3 can descend to some extent, but the gross output of system is improved.
The flywheel energy-accumulating type secondary regulation flux coupling system of present embodiment has reduced the installed power of system, reduces the energy consumption of system, and simple in structure, and diverse in function is with low cost.
Embodiment two: the difference of present embodiment and embodiment one described flywheel energy-accumulating type secondary regulation flux coupling system is, it also comprises magnetic clutch 2, and the output shaft of the live axle of flywheel 1 and dual-axle motor 3 is connected by magnetic clutch 2.
The described flywheel energy-accumulating type secondary regulation flux coupling system of present embodiment is in work, and the original state of system is: hydraulic pump/motor 4 is in the pump operating mode, and magnetic clutch 2 is in separated state, and dual-axle motor 3 is in running order, and working procedure is:
Motor driving, the drive hydraulic pump/motor 4 of dual-axle motor 3 drives hydraulic jack 10 and drives load 14 risings;
Driving/energy storage conversion, when oil hydraulic cylinder 10 drives the moment that load 14 rises to the position of triggering upper limit sensor 11, controller 15 control electro-hydraulic control valves 5 drive the swashplate angle Zero Crossing Point of the driveshaft drive hydraulic pump/motor 4 of variable oil cylinder 6, make hydraulic pump/motor 4 be converted to the motor operating mode, simultaneously, closed electromagnetic clutch 2 makes the transmission shaft of dual-axle motor 3 be connected with the live axle of flywheel 1, disconnects the working power of dual-axle motor 3;
Energy storage, load 14 are under the effect of gravity, and the piston rod that drives oil hydraulic cylinder 10 descends, and then provide hydraulically-driven hydraulic pump/motor 4 to drive the flywheel rotation by the transmission shaft of dual-axle motor 3, that is, weight potential energy is converted into flywheel energy is stored in the flywheel;
Energy storage/driving conversion, drop to the moment of the position of triggering lower limit sensor 11 when load 14,5 actions of controller 15 control electro-hydraulic control valves, the driveshaft that drives variable oil cylinder 6 drives the swash plate rotation of hydraulic pump/motor 4, makes hydraulic pump/motor 4 be transformed into the pump operating mode;
Flywheel drives, and flywheel 1 substitutes the 10 drive loads 14 of dual-axle motor 3 drive hydraulic pump/motors 4 driving hydraulic jacks and rises;
Repeat the step that above-mentioned driving/energy storage conversion, energy storage, energy storage/driving conversion and flywheel drive, when in the flywheel actuation step, when flywheel can not drive oil hydraulic cylinder 10 proper functioning, disconnect magnetic clutch 2, connect the working power of dual-axle motor 3, return motor-driven step, restart.
In above-mentioned working state, at first adopt the driven by motor loaded work piece, adopt the potential energy of flywheel storage loads then, and use the energy drives loaded work piece of flywheel storage, when the energy of flywheel storage can not drive loaded work piece, restart motor driving.Recovery that this working state is real-time with the flywheel energy stored and release are fit on the equipment that the type frequently reciprocating to steady load drives.
Embodiment one or two described flywheel energy-accumulating type secondary regulation flux coupling systems are when reality is implemented; usually also comprise safety valve 8, one-way valve 9; safety valve 8 and one-way valve 9 are connected in parallel on two oil transportation mouths of hydraulic pump/motor 4, and the oil outlet of the oil outlet of described safety valve 8 and one-way valve 9 is communicated with fuel tank 13.
Described safety valve 8 and one-way valve 9 play the effect of safety guarantee in system, can make system works safer, reliable, can also increase the working life of system.
Claims (3)
1. flywheel energy-accumulating type secondary regulation flux coupling system, it comprises dual-axle motor (3), hydraulic pump/motor (4), electro-hydraulic control valve (5), variable oil cylinder (6), reduction valve (7), oil hydraulic cylinder (10), upper limit sensor (11), lower limit sensor (12), controller (15) and fuel tank (13), it is characterized in that it also comprises flywheel (1), the live axle of flywheel (1) is fixedlyed connected with an output shaft of dual-axle motor (3), another output shaft of described dual-axle motor (3) is fixedlyed connected with the transmission shaft of hydraulic pump/motor (4), the swash plate (4-1) of hydraulic pump/motor (4) is connected with the piston rod of variable oil cylinder (6), two oil transportation mouths of described variable oil cylinder (6) are communicated with two oil transportation mouths of electro-hydraulic control valve (5) respectively, two oil transportation mouths in addition of described electro-hydraulic control valve (5) are communicated with the oil outlet of fuel tank (13) and reduction valve (7) respectively, an oil transportation mouth of the filler opening of described reduction valve (7) and hydraulic pump/motor (4), an oil transportation mouth of oil hydraulic cylinder (10) is communicated with, another oil transportation mouth of described hydraulic pump/motor (4) and another oil transportation mouth of described oil hydraulic cylinder (10) all are communicated with fuel tank (13), the side that upper limit sensor (11) and lower limit sensor (12) are separately fixed at the piston rod of oil hydraulic cylinder (10) is used for measuring the position of described piston rod, distance between described upper limit sensor (11) and the lower limit sensor (12) is the working stroke of the piston rod of oil hydraulic cylinder (10), the signal output part of upper limit sensor (11) and lower limit sensor (12) is connected with the signal input part of controller (15) respectively, and the control signal output terminal of controller (15) is connected with the control signal input end of electro-hydraulic control valve (5).
2. flywheel energy-accumulating type secondary regulation flux coupling system according to claim 1 is characterized in that, it also comprises magnetic clutch (2), and the output shaft of the live axle of flywheel (1) and dual-axle motor (3) is connected by magnetic clutch (2).
3. flywheel energy-accumulating type secondary regulation flux coupling system according to claim 1 and 2, it is characterized in that, it also comprises safety valve (8), one-way valve (9), safety valve (8) and one-way valve (9) are connected in parallel on two oil transportation mouths of hydraulic pump/motor (4), and the oil outlet of the oil outlet of described safety valve (8) and one-way valve (9) is communicated with fuel tank (13).
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| CNA200810064038XA CN101230871A (en) | 2008-02-27 | 2008-02-27 | Flywheel energy-accumulating type secondary regulation flux coupling system |
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| CNA200810064038XA CN101230871A (en) | 2008-02-27 | 2008-02-27 | Flywheel energy-accumulating type secondary regulation flux coupling system |
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| CN101956405A (en) * | 2010-07-15 | 2011-01-26 | 吉林大学 | Gravitational potential energy recovery device during descending of engineering machinery movable arm |
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| CN101956405A (en) * | 2010-07-15 | 2011-01-26 | 吉林大学 | Gravitational potential energy recovery device during descending of engineering machinery movable arm |
| CN102072015A (en) * | 2010-12-31 | 2011-05-25 | 潍柴动力股份有限公司 | Engine |
| CN102619817A (en) * | 2011-01-26 | 2012-08-01 | 南京工程学院 | Flywheel energy-accumulating energy-saving-type hydraulic vibration system |
| CN102619817B (en) * | 2011-01-26 | 2015-07-15 | 南京工程学院 | Flywheel energy-accumulating energy-saving-type hydraulic vibration system |
| CN102260759A (en) * | 2011-06-29 | 2011-11-30 | 衢州台威精工机械有限公司 | Hydraulic rocker cutting machine |
| CN102322461B (en) * | 2011-10-17 | 2014-04-02 | 上海三一重机有限公司 | Hydraulic actuating mechanism and method for recycling energy |
| CN102322461A (en) * | 2011-10-17 | 2012-01-18 | 上海三一重机有限公司 | Hydraulic actuating mechanism and method for recycling energy |
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| CN102797728A (en) * | 2011-12-29 | 2012-11-28 | 南京工程学院 | Variable flywheel-based energy-saving hydraulic vibration system and working mode thereof |
| CN102797713A (en) * | 2011-12-29 | 2012-11-28 | 南京工程学院 | Rotating disc type variable flywheel |
| CN105201936A (en) * | 2014-10-16 | 2015-12-30 | 徐州重型机械有限公司 | Hydraulic system and crane |
| US10359063B2 (en) | 2014-11-24 | 2019-07-23 | Xuzhou Heavy Machinery Co.., Ltd. | Method and system for recovering and utilizing operating energy of crane, and crane |
| CN105443514A (en) * | 2014-11-24 | 2016-03-30 | 徐州重型机械有限公司 | Winching energy recovery and reutilization compound control method and system and crane |
| CN104613025B (en) * | 2015-01-23 | 2017-08-25 | 福建海源自动化机械股份有限公司 | A kind of hydraulic system and the method for hydraulic actuator back pressure stroke energy regenerating |
| CN104613025A (en) * | 2015-01-23 | 2015-05-13 | 福建海源自动化机械股份有限公司 | Hydraulic system and recovery method of backpressure stroke energy of hydraulic actuators |
| CN104963903A (en) * | 2015-04-12 | 2015-10-07 | 吉林大学 | Hydraulic flywheel accumulator system based on largest energy accumulation rate, and control method thereof |
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