CN101070864A - Energy-store state-liquid driving device of secondary flow-regulation coupling hydraulic energy accumulator - Google Patents

Energy-store state-liquid driving device of secondary flow-regulation coupling hydraulic energy accumulator Download PDF

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CN101070864A
CN101070864A CN 200710072398 CN200710072398A CN101070864A CN 101070864 A CN101070864 A CN 101070864A CN 200710072398 CN200710072398 CN 200710072398 CN 200710072398 A CN200710072398 A CN 200710072398A CN 101070864 A CN101070864 A CN 101070864A
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energy
oil
hydraulic
motor
valve
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CN 200710072398
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CN100535454C (en
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姜继海
刘宇辉
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哈尔滨工业大学
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Abstract

The invention provides a secondary Regulation flow coupled hydraulic accumulator storage hydrostatic transmission device, relating to a secondary hydrostatic transmission method and systems. It solves the contradiction between constant coltage net which only allows pressure to change in small range and hydraulic pressure accumulator energy recovery subsystems which need to change pressure in a large range existing in the secondary regulation hydrostatic transmission system. It adopts hydraulic pressure accumulator to output hydraulic oil and drives hydraulic pressure storage pump or motor and electric motor to drive hydraulic oil cylinder to work with load. When the load need to descend, load-driven hydraulic pump or motor and storage Hydraulic Pump or Motor change work condition respectively and recover and storage the potential energy which is produced by the hydraulic oil cylinder. When the load need to up run, energy storage hydraulic pump or motor and load driver Hydraulic Pump or Motor change work condition respectively and do the above work again. This invention can be used in the hoist nd hydraulic pumping and so on.

Description

Secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive

Technical field

Secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive relates to a kind of secondary adjusting hydrostatic drive method and system.

Background technique

Secondary adjusting hydrostatic drive technology General Definition is in constant pressure network hydraulic pump/motor not to be had the hydraulic transmission technology that throttling ground carries out closed loop control.Because system's general work is called as CPS (Common Pressure System), CPR (Common Pressure Rail) as a rule in pressure coupling contact system, or SCS (Secondary Controlled System).But this technology owing to have multi-load parallel connection, control characteristic good, can realize that the advantages such as recovery of system's braking kinetic energy and potential energy cause increasing concern, this technology has been applied to fields such as Hoisting Machinery, system of vehicle transmission, large-scale experiment platform abroad.

But, the secondary adjusting hydrostatic transmission system that works in constant pressure network also exists some problems: the one, and this system is in the process of utilizing hydraulic accumulator to carry out the recovery of energy and utilizing again, exist can only be in more among a small circle the constant pressure network that changes of authorized pressure with need limit the recovery of energy and utilization again in the contradiction between the hydraulic accumulator energy recovery subtense angle that internal pressure in a big way changes; The 2nd, when system get involved can not variable hydraulic actuator (hydraulic jack or constant displacement hydraulic motor) time, can not directly carry out the isoparametric control of speed.Address the above problem, a kind of method is to introduce a kind of energy conversion component (hydraulic transformer) 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 the characteristics of flux coupling contact system, 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.

Summary of the invention

For solve exist in the existing secondary adjusting hydrostatic transmission system can only authorized pressure changes more among a small circle in constant pressure network and need the invention provides a kind of secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive in the contradiction between the hydraulic accumulator energy recovery subtense angle of internal pressure variation in a big way.

Secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive, it comprises the load driving hydraulic pump/motor, motor, the energy-storage hydraulic pump/motor, the control oil channel assembly, accumulation of energy electrichydraulic control valve assembly, the hydraulic accumulator assembly, the hydraulic jack relief valve assembly, hydraulic jack, the upper limit sensor, the lower limit sensor, load driving electrichydraulic control valve assembly and controller, the piston rod of hydraulic jack is connected with outside weight load, side at the piston rod of described hydraulic jack is fixed with a upper limit sensor and lower limit sensor, distance between described upper limit sensor and the described lower limit sensor equals the working stroke of described hydraulic jack, and the electrical signal of described upper limit sensor and described lower limit sensor is connected with the control signal input end of controller respectively; An oil transportation mouth of hydraulic jack is communicated with the oil transportation mouth of load driving hydraulic pump/motor, the oil circuit inlet opening of hydraulic jack relief valve assembly respectively, and the oil outlet of load driving hydraulic pump/motor and external fuel tank are communicated with; Piston rod in the load driving electrichydraulic control valve assembly is connected with the swash plate of load driving hydraulic pump/motor; The oil transportation mouth of energy-storage hydraulic pump/motor and the oil transportation mouth of hydraulic accumulator assembly are communicated with, and the oil outlet of described energy-storage hydraulic pump/motor and external fuel tank are communicated with, and the swash plate of described energy-storage hydraulic pump/motor is connected with piston rod in the accumulation of energy electrichydraulic control valve assembly; The control oil channel assembly is made up of oil hydraulic pump and relief valve, the oil circuit inlet opening of described relief valve is with after the oil circuit inlet opening of oil hydraulic pump is communicated with, oil circuit with load driving electrichydraulic control valve assembly, accumulation of energy electrichydraulic control valve assembly is communicated with respectively, and the oil circuit delivery outlet of described relief valve and the oil circuit delivery outlet of oil hydraulic pump are communicated with the back and are communicated with external fuel tank; The transmission shaft of the oil hydraulic pump in load driving hydraulic pump/motor, energy-storage hydraulic pump/motor and the control oil channel assembly is fixedlyed connected with the output shaft of motor respectively; The electrical signal control end of load driving electrichydraulic control valve assembly and accumulation of energy electrichydraulic control valve assembly is connected with the control signal output terminal of controller respectively.

The present invention has realized the recovery of system's weight potential energy and utilization again, thereby reaches energy-conservation effect, has reduced the installed power of system, has reduced the energy consumption of system, and energy-saving effect can reach more than 39%.Can be widely used in elevator system, hydraulic pumping unit system etc. carries out in the mechanical system of operation with the weight hoisting way.

Description of drawings

Fig. 1 is the overall structure schematic representation of embodiment one described device of the present invention; Fig. 2 is the structural representation of embodiment two described devices of the present invention; Fig. 3 is an electrical block diagram of the present invention.

Mode of execution

Embodiment one: the secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive of present embodiment is made up of load driving hydraulic pump/motor 1, motor 2, energy-storage hydraulic pump/motor 3, control oil channel assembly 4, accumulation of energy electrichydraulic control valve assembly 5, hydraulic accumulator assembly 6, hydraulic jack relief valve assembly 7, hydraulic jack 8, upper limit sensor 9, lower limit sensor 10, load driving electrichydraulic control valve assembly 12 and controller 13.

The piston rod of hydraulic jack 8 is connected with outside weight load 11, side at the piston rod of described hydraulic jack 8 is fixed with upper limit sensor 9 and lower limit sensor 10, distance between described upper limit sensor 9 and the described lower limit sensor 10 equals the working stroke of described hydraulic jack 8, and the electrical signal of described upper limit sensor 9 and described lower limit sensor 10 is connected with the control signal input end of controller 13 respectively; An oil transportation mouth of hydraulic jack 8 is communicated with the oil transportation mouth of load driving hydraulic pump/motor 1, the oil circuit inlet opening of hydraulic jack relief valve assembly 7 respectively, and the oil outlet of load driving hydraulic pump/motor 1 and external fuel tank 20 are communicated with; Piston rod in the load driving electrichydraulic control valve assembly 12 is connected with the swash plate 1-1 of load driving hydraulic pump/motor 1; The oil transportation mouth of energy-storage hydraulic pump/motor 3 and the oil transportation mouth of hydraulic accumulator assembly 6 are communicated with, the oil outlet of described energy-storage hydraulic pump/motor 3 and external fuel tank 20 is communicated with, and the swash plate 3-1 of described energy-storage hydraulic pump/motor 3 is connected with piston rod in the accumulation of energy electrichydraulic control valve assembly 5; Control oil channel assembly 4 is made up of oil hydraulic pump 4-2 and relief valve 4-1, the oil circuit inlet opening of described relief valve 4-1 is with after the oil circuit inlet opening of oil hydraulic pump 4-2 is communicated with, oil circuit with load driving electrichydraulic control valve assembly 12, accumulation of energy electrichydraulic control valve assembly 5 is communicated with respectively, and the oil circuit delivery outlet of described relief valve 4-1 and the oil circuit delivery outlet of oil hydraulic pump 4-2 are communicated with the back and are communicated with external fuel tank 20; The transmission shaft of oil hydraulic pump 4-2 in load driving hydraulic pump/motor 1, energy-storage hydraulic pump/motor 3 and the control oil channel assembly 4 is fixedlyed connected with the output shaft of motor 2 respectively; The electrical signal control end of load driving electrichydraulic control valve assembly 12 and accumulation of energy electrichydraulic control valve assembly 5 is connected with the control signal output terminal of controller 13 respectively.

Described load driving electrichydraulic control valve assembly 12 is made up of load driving control oil cylinder 12-1 and load driving regulating and controlling valve 12-2, the piston rod of described load driving control oil cylinder 12-1 is connected with the swash plate 1-1 of load driving hydraulic pump/motor 1, two oil transportation mouths of described load driving regulating and controlling valve 12-2 are communicated with two oil transportation mouths of load driving control oil cylinder 12-1 respectively, two two oil transportation mouths that the oil transportation mouth is a load driving electrichydraulic control valve assembly 12 in addition of described load driving regulating and controlling valve 12-2, respectively with the oil outlet of control oil channel assembly 4, external fuel tank 20 is communicated with, and the electrical signal control end of described load driving regulating and controlling valve 12-2 is connected with the control signal output terminal of controller 13.

Described accumulation of energy electrichydraulic control valve assembly 5 is made up of accumulation of energy control oil cylinder 5-1 and accumulation of energy regulating and controlling valve 5-2, the piston rod of described accumulation of energy control oil cylinder 5-1 is connected with the swash plate 3-1 of energy-storage hydraulic pump/motor 3, two oil transportation mouths of described accumulation of energy regulating and controlling valve 5-2 are communicated with two oil transportation mouths of accumulation of energy control oil cylinder 5-1 respectively, two two oil transportation mouths that the oil transportation mouth is an accumulation of energy electrichydraulic control valve assembly 5 in addition of described accumulation of energy regulating and controlling valve 5-2 are communicated with oil outlet, the external fuel tank 20 of control oil channel assembly 4 respectively.

Described load driving regulating and controlling valve 12-2 and accumulation of energy regulating and controlling valve 5-2 can be solenoid directional control valve, electro-hydraulic reversing valve, electrohydraulic control or electro-hydraulic proportional valve.

Described control oil channel assembly 4 provides the constant pressure liquid potential source for load driving electrichydraulic control valve assembly 12 and accumulation of energy electrichydraulic control valve assembly 5, to guarantee that described load driving electrichydraulic control valve assembly 12 and accumulation of energy electrichydraulic control valve assembly 5 can proper functioning.

Hydraulic accumulator assembly 6 is by hydraulic accumulator 6-1, accumulation of energy stop valve 6-2, accumulator relief valve assembly 6-5 forms, the oil transportation mouth of described hydraulic accumulator 6-1 is communicated with the oil transportation mouth of energy-storage hydraulic pump/motor 3 by accumulation of energy stop valve 6-2, described accumulator relief valve assembly 6-5 is made up of safety shutoff valve 6-4 and accumulation of energy safety valve 6-3, the oil circuit inlet opening of described accumulation of energy safety valve 6-3 is communicated with the back with the oil transportation mouth of safety shutoff valve 6-4 and is communicated with the oil transportation mouth that hydraulic accumulator 6-1 is connected with accumulation of energy stop valve 6-2, and the oil circuit delivery outlet of described accumulation of energy safety valve 6-3 is connected the back and is communicated with external fuel tank 20 with another oil transportation mouth of safety shutoff valve 6-4.

Described hydraulic jack relief valve assembly 7 is made up of one-way valve 7-2 and hydraulic jack safety valve 7-1, the oil circuit input end of described hydraulic jack safety valve 7-1 is communicated with the back and is that the oil circuit input end of hydraulic jack relief valve assembly 7, the oil circuit output terminal of described hydraulic jack safety valve 7-1 are communicated with the back and are communicated with external fuel tank 20 with the oil circuit output terminal of described one-way valve 7-2 with the oil circuit input end of described one-way valve 7-2.

The controlling method of the secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive of present embodiment is:

Step 1, be in the oil hydraulic motor operating mode energy-storage hydraulic pump/motor 3 under the effect of the high pressure oil of hydraulic accumulator assembly 6 outputs, drive the load driving hydraulic pump/motor 1 that is in the oil hydraulic pump operating mode with motor 2 and rotate, the high pressure oil of load driving hydraulic pump/motor 1 output drives hydraulic jack 8 up and then lifting loads 11;

Step 2, when hydraulic jack 3 goes upward to upper limit position, upper limit sensor 9 sends electrical signal and gives controller 13, described 13 while of controller control load driving electrichydraulic control valve assembly 12 and accumulation of energy electrichydraulic control valve assembly 5 drive the swash plate conversion station of load driving hydraulic pump/motor 1 and energy-storage hydraulic pump/motor 3 respectively, make load driving hydraulic pump/motor 1 and energy-storage hydraulic pump/motor 3 be transformed into oil hydraulic motor operating mode and oil hydraulic pump operating mode respectively;

Step 3, hydraulic jack 8 begin descending under the effect of load 11 gravity, making hydraulic jack 8 output high pressure oils drive the load driving hydraulic pump/motor 1 that is in the oil hydraulic motor operating mode rotates, described load driving hydraulic pump/motor 1 drives the energy-storage hydraulic pump/motor 3 that is in the oil hydraulic pump operating mode with motor 2, and energy-storage hydraulic pump/motor 3 output high pressure oils carry out pressurising, accumulation of energy to hydraulic accumulator assembly 6;

Step 4, when hydraulic jack 8 comes downwards to the lower position, lower limit sensor 10 sends electrical signal and gives controller 13, described 13 while of controller control load drives electrichydraulic control valve assembly 12 and accumulation of energy electrichydraulic control valve assembly 5 drives the swash plate 1-1 of load driving hydraulic pump/motor 1 respectively and the swash plate 3-1 of energy-storage hydraulic pump/motor 3 changes, make load driving hydraulic pump/motor 1 and energy-storage hydraulic pump/motor 3 be transformed into oil hydraulic pump operating mode and oil hydraulic motor operating mode respectively, return execution in step one then.

The secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive of present embodiment, by two hydraulic pump/motors hydraulic jack being driven the potential energy converting and energy that produces in the descending process by load in the course of the work becomes hydraulic pressure can be stored in the hydraulic accumulator, the hydraulic pressure that will be stored in the hydraulic accumulator by two hydraulic pump/motors again when device needs to promote load can rise by the charge releasing belt hydraulic cylinder then, owing to can reclaim the gravitational potential energy in the descending process of load, can reduce the installed power of system, loading condition reasonable disposition hydraulic accumulator according to system can reach extraordinary energy-saving effect.

Embodiment two: the difference of present embodiment and embodiment one described secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive is, it also comprises control oil channel drive motor 14, the transmission shaft of control oil hydraulic pump 4-2 in the control oil channel assembly 4 is not connected with the output shaft of motor 2, but fixedlys connected with the output shaft of described control oil channel drive motor 14.

The control oil channel assembly 4 of present embodiment works independently, and is not subjected to the influence of drive motor 2 operating modes.

Embodiment three: the difference of present embodiment and embodiment one or two described secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drives is, it also comprises a plurality of accumulator assemblies 6, is communicated with the oil transportation mouth of energy-storage hydraulic pump/motor 3 after the oil transportation mouth of described a plurality of hydraulic accumulator assemblies is connected in parallel.

Present embodiment has increased a plurality of hydraulic accumulator assembly 6 in parallel uses, can be configured a plurality of hydraulic accumulator assemblies according to the volume of actual field situation and selected accumulator, the situation of delivery pressure, has improved the versatility of system.

Embodiment four: the secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive of present embodiment, select two hydraulic accumulator assemblies 6 for use, the actual conditions of the hydraulic jack 8 of setting is: promote maximum load quality 8,000kg; Maximum stroke 6m; Jig frequency is 2~5 times/minute.

Hydraulic jack 8 up lifting loads the power of procedures system be:

P e+P ac=P L (1)

P in the formula e---output power of motor (kW);

P Ac---hydraulic accumulator output power (kW);

P L---drive load power demand (kW).

Load on the down stroke process of energy feedback, the power of system is:

P L+P e=P ac (2)

The internal diameter 100mm of selected hydraulic jack, diameter of piston rod 70mm, effective travel 6m, the prestissimo of oil hydraulic cylinder is not less than 1m/s.

By formula F A = 8000 × 9.8 π 4 ( 0.1 2 - 0.07 2 ) = 19.6 MPa , the maximum delivery pressure that can get oil hydraulic cylinder is 19.6MPa, maximum output is p L=8000 * 9.8 * 1=78.4kW.

Hydraulic accumulator 6-1 in described two hydraulic energy-accumulating assemblies 6 all chooses the 40L air sac type hydraulic accumulator that model is NXQA-40/31.5-L, and the output power of each hydraulic accumulator is 21.6kW, and then the output power of two hydraulic accumulators is P Ac=2 * 21.6=43.2kW.

It is the inclined disc type Variable plunger pump of A4VSO 250 model of 250ml/r that load driving hydraulic pump/motor 1 is selected discharge capacity for use, and it is the inclined disc type Variable plunger pump of A4VSO 125 types of 125ml/r that energy-storage hydraulic pump/motor 3 is selected discharge capacity for use.

The output power that can be got motor 2 by formula (1) is:

P e=P L-P ac=78.4-43.2=35.2kW

According to the aforementioned calculation result, selected rated power be 37kW, synchronous speed be the motor of 1500r/min as motor 2, can select Y225S-4 type threephase asynchronous.

The load required power of the hydraulic jack of native system is 78.4kW, and as installed power only is 37kW, and the power that needs than load has reduced by 47.19%.

On-the-spot debugging and measurement are convenient in the system of present embodiment, can carry out stepless beat setting to stroke and jig frequency at any time according to operating mode, can adjust the variation of adaptation condition by systematic parameter, guarantee the optimum performance of complete machine.

Claims (10)

1, secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive, it comprises load driving hydraulic pump/motor (1), motor (2), energy-storage hydraulic pump/motor (3), control oil channel assembly (4), accumulation of energy electrichydraulic control valve assembly (5), hydraulic accumulator assembly (6), hydraulic jack relief valve assembly (7), hydraulic jack (8), upper limit sensor (9), lower limit sensor (10), load driving electrichydraulic control valve assembly (12) and controller (13) are formed, it is characterized in that, the piston rod of hydraulic jack (8) is connected with outside weight load (11), side at the piston rod of described hydraulic jack (8) is fixed with upper limit sensor (9) and lower limit sensor (10), distance between described upper limit sensor (9) and the described lower limit sensor (10) equals the working stroke of described hydraulic jack (8), and the electrical signal of described upper limit sensor (9) and described lower limit sensor (10) is connected with the control signal input end of controller (13) respectively; An oil transportation mouth of hydraulic jack (8) is communicated with the oil transportation mouth of load driving hydraulic pump/motor (1), the oil circuit inlet opening of hydraulic jack relief valve assembly (7) respectively, and the oil outlet of load driving hydraulic pump/motor (1) and external fuel tank (20) are communicated with; The swash plate (1-1) of piston rod in the load driving electrichydraulic control valve assembly (12) and load driving hydraulic pump/motor (1) is connected; The oil transportation mouth of the oil transportation mouth of energy-storage hydraulic pump/motor (3) and hydraulic accumulator assembly (6) is communicated with, the oil outlet of described energy-storage hydraulic pump/motor (3) and external fuel tank (20) are communicated with, and the swash plate (3-1) of described energy-storage hydraulic pump/motor (3) is connected with piston rod in the accumulation of energy electrichydraulic control valve assembly (5); Control oil channel assembly (4) is made up of oil hydraulic pump (4-2) and relief valve (4-1), the oil circuit inlet opening of described relief valve (4-1) is with after the oil circuit inlet opening of oil hydraulic pump (4-2) is communicated with, oil circuit with load driving electrichydraulic control valve assembly (12), accumulation of energy electrichydraulic control valve assembly (5) is communicated with respectively, and the oil circuit delivery outlet of the oil circuit delivery outlet of described relief valve (4-1) and oil hydraulic pump (4-2) is communicated with the back and is communicated with external fuel tank (20); The transmission shaft of the oil hydraulic pump (4-2) in load driving hydraulic pump/motor (1), energy-storage hydraulic pump/motor (3) and the control oil channel assembly (4) is fixedlyed connected with the output shaft of motor (2) respectively; The electrical signal control end of load driving electrichydraulic control valve assembly (12) and accumulation of energy electrichydraulic control valve assembly (5) is connected with the control signal output terminal of controller (13) respectively.
2, secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive according to claim 1, it is characterized in that described load driving electrichydraulic control valve assembly (12) is controlled oil cylinder (12-1) by load driving and load driving regulating and controlling valve (12-2) is formed, the output shaft of described load driving control oil cylinder (12-1) is connected with the swash plate (1-1) of load driving hydraulic pump/motor (1), two oil transportation mouths of described load driving regulating and controlling valve (12-2) are communicated with two oil transportation mouths of load driving control oil cylinder (12-1) respectively, two two oil transportation mouths that the oil transportation mouth is a load driving electrichydraulic control valve assembly (12) in addition of described load driving regulating and controlling valve (12-2), respectively with the oil outlet of control oil channel assembly (4), external fuel tank (20) is communicated with, and the electrical signal control end of described load driving regulating and controlling valve (12-2) is connected with the control signal output terminal of controller (13).
3, secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive according to claim 1, it is characterized in that described accumulation of energy electrichydraulic control valve assembly (5) is controlled oil cylinder (5-1) by accumulation of energy and accumulation of energy regulating and controlling valve (5-2) is formed, the output shaft of described accumulation of energy control oil cylinder (5-1) is connected with the swash plate (3-1) of energy-storage hydraulic pump/motor (3), two oil transportation mouths of described accumulation of energy regulating and controlling valve (5-2) are communicated with two oil transportation mouths of accumulation of energy control oil cylinder (5-1) respectively, in addition two two oil transportation mouths that the oil transportation mouth is an accumulation of energy electrichydraulic control valve assembly (5) of described accumulation of energy regulating and controlling valve (5-2) are respectively with the oil outlet of control oil channel assembly (4), external fuel tank (20) is communicated with.
4, secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive according to claim 2 is characterized in that described load driving regulating and controlling valve (12-2) is solenoid directional control valve or electro-hydraulic reversing valve or electrohydraulic control or electro-hydraulic proportional valve.
5, secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive according to claim 3 is characterized in that described accumulation of energy regulating and controlling valve (5-2) is solenoid directional control valve or electro-hydraulic reversing valve or electrohydraulic control or electro-hydraulic proportional valve.
6, secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive according to claim 1, it is characterized in that described hydraulic accumulator assembly (6) is by hydraulic accumulator (6-1), accumulation of energy stop valve (6-2), accumulator relief valve assembly (6-5) is formed, the oil transportation mouth of described hydraulic accumulator (6-1) is communicated with by the oil transportation mouth of accumulation of energy stop valve (6-2) with energy-storage hydraulic pump/motor (3), described accumulator relief valve assembly (6-5) is made up of safety shutoff valve (6-4) and accumulation of energy safety valve (6-3), the oil circuit inlet opening of described accumulation of energy safety valve (6-3) is communicated with the back with an oil transportation mouth of safety shutoff valve (6-4) and is communicated with the oil transportation mouth that hydraulic accumulator (6-1) is connected with accumulation of energy stop valve (6-2), and the oil circuit delivery outlet of described accumulation of energy safety valve (6-3) is connected the back and is communicated with external fuel tank (20) with another oil transportation mouth of safety shutoff valve (6-4).
7, secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive according to claim 6 is characterized in that described hydraulic accumulator (6-1) is the air sac type hydraulic accumulator.
8, secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive according to claim 1, it is characterized in that described hydraulic jack relief valve assembly (7) is made up of one-way valve (7-2) and oil cylinder safety valve (7-1), the oil circuit input end of described oil cylinder safety valve (7-1) is communicated with the back and is that the oil circuit input end of hydraulic jack relief valve assembly (7), the oil circuit output terminal of described oil cylinder safety valve (7-1) are communicated with the back and are communicated with external fuel tank (20) with the oil circuit output terminal of described one-way valve (7-2) with the oil circuit input end of described one-way valve (7-2).
9, secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drive according to claim 1, it is characterized in that it also comprises control oil channel drive motor (14), the transmission shaft of the oil hydraulic pump (4-2) in the control oil channel assembly (4) is not connected with the output shaft of motor (2), but fixedlys connected with the output shaft of described control oil channel drive motor (14).
10, according to claim 1 or 9 described secondary flow-regulation coupling hydraulic accumulator energy storage hydrostatic drives, it is characterized in that it also comprises a plurality of hydraulic accumulator assemblies (6), be communicated with the oil transportation mouth of energy-storage hydraulic pump/motor (3) after the oil transportation mouth of described a plurality of hydraulic accumulator assemblies is connected in parallel.
CN 200710072398 2007-06-25 2007-06-25 Energy-store state-liquid driving device of secondary flow-regulation coupling hydraulic energy accumulator CN100535454C (en)

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