CN105179343B - Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method - Google Patents
Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method Download PDFInfo
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- CN105179343B CN105179343B CN201510706232.3A CN201510706232A CN105179343B CN 105179343 B CN105179343 B CN 105179343B CN 201510706232 A CN201510706232 A CN 201510706232A CN 105179343 B CN105179343 B CN 105179343B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000003921 oil Substances 0.000 claims abstract description 76
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 28
- 238000011084 recovery Methods 0.000 claims abstract description 28
- 239000012530 fluid Substances 0.000 claims description 16
- 238000005086 pumping Methods 0.000 claims description 9
- 239000002828 fuel tank Substances 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 230000007306 turnover Effects 0.000 description 6
- 238000004134 energy conservation Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/04—Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Automation & Control Theory (AREA)
- Fluid-Pressure Circuits (AREA)
- Elevator Control (AREA)
Abstract
The invention discloses a multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method which are applicable to lifting systems such as a hydraulic lift and a construction lifting platform. The system comprises an oil compensating loop, a volume speed adjusting and energy recovery loop, a manual lifting loop, a synchronous locking loop, a hydraulic cylinder and an inclined angle sensor. The oil compensating loop is used for compensating for hydraulic oil in a closed-loop system and decreasing the temperature rise of oil, wherein the lack of hydraulic oil is caused by adjustment of the synchronous locking loop and system leakage. The volume speed adjusting and energy recovery loop provides power, speed adjustment and energy recovery for the system. The manual lifting loop is used for manually lifting a platform when the system breaks down, and the synchronous locking loop is used for locking an oil cylinder when multiple hydraulic cylinders are adjusted to move synchronously and the platform is static. The inclined angle sensor detects the pose of the platform in real time and feeds back the pose to a control center to achieve closed-loop control. The system is efficient and saves energy, energy recovery and multi-cylinder accurate synchronization are achieved, the lifting platform is strong in unbalance loading resistance, running is stable, and reliability is high.
Description
Technical field
It is the present invention relates to a kind of jacking system and method, especially a kind of suitable for hydraulic elevator, construction lifting platform
Multi-cylinder synchronous efficient energy-saving hydraulic lifting system and method.
Background technology
The type of drive of jacking system mainly has traction-type and fluid pressure type.Hydraulic-driven has big, stepless speed regulation of exerting oneself, is
The advantages of system is succinct, easy to control, but hydraulically powered efficiency is low compared to tractive driving." green energy conservation " is lift system
Following developing goal.At present, electrical-liquid control and volumetric speed control is adopted mostly to control in hydraulic elevator system, although to realize
The reduction of the energy loss of ascending for elevator, but elevator it is descending when, the fluid in oil cylinder is under pressure through descending throttling
Valve, can cause the temperature rise of hydraulic system.The descending gravitional force of elevator is not only utilized, and is also translated into heat energy and is caused fluid temperature
Rise, affect system stability.
The support pattern of hydraulic elevator mainly has direct jacking type and indirect jacking type.Directly jacking type is compared to top indirectly
Lift-type is simple and compact for structure, and operational efficiency is high.Directly jacking type mainly has middle straight top type and twin-tub straight top type at present.Both
Mode is for, under cabin uneven loading state, hydraulic cylinder is subject to side force larger, big to parts depreciations such as elevator guide shoes, is unfavorable for system
Stable operation.
The content of the invention
Technical problem：The purpose of the present invention is for problems of the prior art, there is provided a kind of simple compact, section of structure
Can, stable, the high multi-cylinder synchronous efficient energy-saving hydraulic lifting system of reliability and method.
Technical scheme：The present invention multi-cylinder synchronous efficient energy-saving hydraulic lifting system, including feed circuit, volumetric speed control and
Energy recovery circuit, hand-operated lifting loop, synchronization are locked loop, the multiple hydraulic cylinders being supported in below hoistable platform and are installed on
Obliquity sensor on hoistable platform；Described feed circuit is connected with the input of volumetric speed control and energy recovery circuit, institute
The output end for stating volumetric speed control and energy recovery circuit is connected with synchronous locking loop input pipeline, and volumetric speed control and energy are returned
Withdrawing and hand-operated lifting loop is connected with the pipeline that road is connected with synchronous locking loop, described each hydraulic cylinder is connected with a locking
Loop, locking loop are connected with flow divider-combiner and electrohydraulic servo valve respectively, by locking loop, flow divider-combiner and electrohydraulic servo valve
Constitute the synchronous locking loop to multiple hydraulic cylinders；
Described feed circuit includes motor, the slippage pump being connected with motor, the entrance of slippage pump through filter with
Fuel tank pipeline is connected, and the outlet Jing pumping holes check valve of slippage pump is connected with volumetric speed control and energy recovery circuit pipeline, check valve
The export pipeline of pumping hole is provided with the overflow valve communicated with fuel tank；
Described volumetric speed control and energy recovery circuit include that accumulator, oil inlet and oil return hydraulic control one-way valve, oil inlet and oil return electromagnetism are changed
To valve, safety valve, frequency control motor, hydraulic pump, hydraulic motor, generator and lifting solenoid directional control valve；Described accumulator
Be connected with oil inlet and oil return hydraulic control one-way valve with the export pipeline of pumping hole check valve, the control port of oil inlet and oil return hydraulic control one-way valve with enter back
The break-make mouth of electromagnetic oil reversal valve is connected, the outlet of oil inlet and oil return hydraulic control one-way valve and the anti-entrance for being emptied check valve, hydraulic pump
Inlet port is connected with the oil-out of hydraulic motor, and described frequency control motor is mechanically connected with the input shaft of hydraulic pump, described
The output shaft of generator and hydraulic motor be mechanically connected, the oil-out of hydraulic pump and safety valve, lift entering for solenoid directional control valve
Mouth is connected, and the oil-in of hydraulic motor is connected with the outlet of lifting solenoid directional control valve；
Described hand-operated lifting loop include the hydraulic hand-pump that is connected of the import and export pipeline with lifting solenoid directional control valve and
The Manual descending reversal valve that hand-hydraulic pump discharge is connected；
Described synchronous locking loop includes the flow divider-combiner being connected with the import and export pipeline of lifting solenoid directional control valve；Institute
State the diffluence pass of flow divider-combiner to be connected with the oil-in of electrohydraulic servo valve, diffluence pass and the electrohydraulic servo valve of flow divider-combiner
Oil-in is connected；The entrance in locking loop is connected with the diffluence pass of flow divider-combiner, lock loop outlet with it is corresponding
The rodless cavity of hydraulic cylinder is connected.
Described hydraulic cylinder is two, three, four, six, eight or ten.
Described locking loop includes the locking locked hydraulic control one-way valve, be connected with the control port of locking hydraulic control one-way valve
The solenoid directional control valve unblock hand-operated direction valve in parallel with locking hydraulic control one-way valve.
The multi-cylinder synchronous efficient energy-saving hydraulic lifting method of said system, comprises the steps：
1. hoistable platform runs up：Control oil inlet and oil return solenoid directional control valve is powered, and opens oil inlet and oil return hydraulic control one-way valve, enters back
The entrance of oily hydraulic control one-way valve and outlet conducting, the hydraulic oil in accumulator enter hydraulic pump produces driving force under oil pressure effect
Square；Meanwhile, control frequency control motor carries out variable frequency volume speed governing, makes the pressure and flow of hydraulic pump output setting, hydraulic oil
The rodless cavity of hydraulic cylinder is entered after lifting solenoid directional control valve, flow divider-combiner and locking hydraulic control one-way valve, makes hoistable platform
Run up；
2. hoistable platform is run downwards：Control locking solenoid directional control valve is opened locking hydraulic control one-way valve, makes locking by electricity
The outlet of hydraulic control one-way valve is turned on entrance；Lifting solenoid directional control valve obtains electric, and the deadweight of hoistable platform makes the rodless cavity of hydraulic cylinder
Hydraulic oil flows back, and through locking hydraulic control one-way valve, flow divider-combiner and lifting solenoid directional control valve rear-guard hydrodynamic pressure revolution, makes
Hoistable platform is run downwards；Hydraulic motor drives generator to rotate and generates electricity, and realizes the once recovery of energy；Going out from hydraulic motor
The hydraulic oil of hydraulic fluid port output is saved in accumulator through oil inlet and oil return hydraulic control one-way valve, realizes the secondary recovery of energy；
3. multi-cylinder synchronization：Hydraulic oil passes in and out the flow of each hydraulic cylinder substantially after flow divider-combiner shunting
It is equal；According to the real-time angular signal of the obliquity sensor feedback on hoistable platform, electrohydraulic servo valve is controlled by input hydraulic cylinder
Fluid Jing electrohydraulic servo valves discharge oil return box on the larger in-line of flow, realizes multi-cylinder precise synchronization, so as to ensure lifting
The real-time level of platform；
4. hoistable platform is adjusted manually：When hydraulic lifting system occurs power-off or failure, hoistable platform is adjusted manually, will
Unblock hand-operated direction valve is removed to left position and is unlocked；
If desired hoistable platform is lifted, hydraulic oil is sent into system by manual actuation hydraulic hand-pump, and hydraulic oil is through shunting
Combiner valve and unblock hand-operated direction valve enter hydraulic cylinder rodless cavity, hoistable platform is increased；
If desired decline hoistable platform, Manual descending reversal valve is pulled manually to left position, the hydraulic pressure in hydraulic cylinder rodless cavity
Oil flows back to fuel tank through unblock hand-operated direction valve, flow divider-combiner and Manual descending reversal valve, declines hoistable platform；
Hoistable platform is adjusted to desired location, hand-reset unblock hand-operated direction valve and Manual descending reversal valve are to the right side
Position, locks hoistable platform.
Beneficial effect：As a result of above-mentioned technical proposal, the present invention has advantages below compared with prior art：
(1) system high efficiency energy-conservation, realizes energy regenerating：Hydraulic lifting system adopts variable frequency volume speed control loop, in realization
Row energy-conservation；Hydraulic lifting system adopts generator and accumulator, and platform descending gravitional force is converted to electric energy and hydraulic energy
Storage, for the energy supplement for being lifted next time, makes hydraulic system form closed system, realizes the efficient of system overall operation
Energy-conservation；
(2) multi-cylinder precise synchronization, hoistable platform offset load resistance are strong：Hydraulic lifting system is same roughly using flow divider-combiner
Step, then synchronous error is detected by the obliquity sensor on platform, the error of tilt of feedback controls electro-hydraulic watching through control system
Valve is taken, the fluid on the in-line of advanced hydraulic cylinder is discharged oil return box from electrohydraulic servo valve, it is so as to ensure precise synchronization, real
The real-time horizontal lifting of existing platform.Lifted using multi-cylinder supporting, improve the offset load resistance of hoistable platform.
(3) system run all right, reliability are high：Hydraulic lifting system adopts volumetric speed control and energy recovery circuit, system
Efficiency high, caloric value are few, and fluid temperature rise is little, system run all right.System realizes oil cylinder coarse synchronization using flow divider-combiner, electricity
Hydraulic servo realizes oil cylinder precise synchronization, and in the case of electro-hydraulic servo defective valve, hoistable platform can still realize synchronization lifting.
System architecture is simple, and the degree of modularity is high, safe and reliable.
Description of the drawings
Fig. 1 is the hydraulic schematic diagram of total system of the present invention；
Fig. 2 is the hydraulic schematic diagram of the feed circuit of the present invention；
Fig. 3 is the hydraulic schematic diagram of the volumetric speed control and energy recovery circuit of the present invention；
Fig. 4 is the hydraulic schematic diagram in the hand-operated lifting loop of the present invention；
Fig. 5 is the hydraulic schematic diagram in the synchronous locking loop of three hydraulic cylinders of driving of the present invention；
Fig. 6 is the hydraulic schematic diagram in the locking loop of the present invention.
Fig. 7 is the hydraulic schematic diagram in the synchronous locking loop of two hydraulic cylinders of driving of the present invention；
Fig. 8 is the hydraulic schematic diagram in the synchronous locking loop of four hydraulic cylinders of driving of the present invention；
Fig. 9 is the hydraulic schematic diagram in the synchronous locking loop of six hydraulic cylinders of driving of the present invention；
In figure：1- feed circuits；2- volumetric speed controls and energy recovery circuit；3- hand-operated liftings loop；4- is synchronously locked back
Road；5- hydraulic cylinders；6- hoistable platforms；6-1- obliquity sensors；1-1- filters；1-2- motor；1-3- slippage pumps；1-4- pumps
Mouth check valve；1-5- overflow valves；2-1- accumulators；2-2- oil inlet and oil return hydraulic control one-way valves；2-3- oil inlet and oil return solenoid directional control valves；2-4-
It is anti-to be emptied check valve；2-5- safety valves；2-6- frequency control motors；2-7- hydraulic pumps；2-8- hydraulic motors；2-9- generators；
2-10- lifts solenoid directional control valve；3-1- hydraulic hand-pumps；3-2- Manual descending reversal valves；4-1- flow divider-combiners；4-2- is electro-hydraulic
Servo valve；4-3- locks loop；4-31- locks solenoid directional control valve；4-32- locks hydraulic control one-way valve；4-33- unlocks manual reverse of direction
Valve.
Specific embodiment：
The invention will be further described for embodiment in below in conjunction with the accompanying drawings：
Embodiment 1, as shown in figure 1, multi-cylinder synchronous efficient energy-saving hydraulic lifting system, mainly by feed circuit 1, adjustment with volume
Speed and energy recovery circuit 2, hand-operated lifting loop 3, synchronous locking loop 4,5 and of hydraulic cylinder being supported in below hoistable platform 6
The obliquity sensor 6-1 being installed on hoistable platform 6 is constituted.Described feed circuit 1 is by pipeline and volumetric speed control and energy
Reclaim loop 2 to connect, volumetric speed control and energy recovery circuit 2, hand-operated lifting loop 3 and synchronous locking loop 4 are mutual by pipeline
For connecting, each hydraulic cylinder 5 is connected with a locking loop 4-3, and locking loop 4-3 is connected with flow divider-combiner 4-1 and electro-hydraulic respectively
Servo valve 4-2, constitutes the synchrolock to three hydraulic cylinders 5 by locking loop 4-3, flow divider-combiner 4-1 and electrohydraulic servo valve 4-2
Tight loop 4.1 function of feed circuit is system supplement as synchronous locking loop 4 adjusts the closed-loop system caused with system leak
The temperature rise of fluid in the deficiency of interior hydraulic oil, and reduction system；Volumetric speed control and energy recovery circuit 2 are played and provide dynamic for system
The function of power, speed regulation and energy regenerating；Manual lifting platform when 3 function of hand-operated lifting loop is system malfunctions；Together
Locking cylinder when step locking 4 function of loop is for adjusting three 5 synchronization liftings of hydraulic cylinder and static platform 6；Obliquity sensor 6-1 work(
For the pose of real-time detection platform and control centre can be fed back to, realize closed-loop control.
As shown in figure 5, the synchronous locking loop 4 of described three hydraulic cylinders of driving includes and lifting solenoid directional control valve 2-10
Import and export P by pipeline be connected split ratio be 1:The A mouths of 2 flow divider-combiner 4-1, flow divider-combiner 4-1 are watched with electro-hydraulic
Take the A mouths of valve 4-2 to be connected with locking loop 4-3, the B mouths of flow divider-combiner 4-1 and the B mouths of electrohydraulic servo valve 4-2 and split ratio
For 1:The P mouths of 1 flow divider-combiner II are connected, and the diffluence pass of flow divider-combiner II is respectively at electrohydraulic servo valve II and locking loop
II is connected, and locks loop 4-3 and is connected with the rodless cavity of corresponding hydraulic cylinder 5.Wherein, after shunting twice, fluid is divided equally
Loop 4-3 and hydraulic cylinder 5 are locked for three parts of roughly equal turnover of flow, electrohydraulic servo valve is used for further adjusting each oil cylinder
Enter outflow, realize high-precise synchronization.As long as correcting streaming error by bleeding off the flow of very little due to servo valve, therefore can adopt
The servo valve of low capacity, reduces the cost of system, improves the fast-response being adjusted in synchronism.
As shown in Fig. 2 described feed circuit 1 includes the filter 1-1 being connected with fuel tank, filter 1-1 is installed and is ensured
Into the cleaning of hydraulic system oil liquid, it is ensured that the reliability of system operation；The inlet port of slippage pump 1-3 is led to filter 1-1
Cross pipeline to be connected, the input shaft of motor 1-2 and slippage pump 1-3 is mechanically connected, A mouths and the slippage pump 1-3 of pumping hole check valve 1-4
Oil-out by pipeline be connected, install pumping hole check valve 1-4 prevent the hydraulic oil flow-reversing impingement slippage pump 1-3 into system；
Overflow valve 1-5 is connected by pipeline with the B mouths of pumping hole check valve 1-4, and regulation relief valve 1-5 controls are into hydraulic system oil liquid
Pressure.
As shown in figure 3, described volumetric speed control and energy recovery circuit 2 include passing through pipe with the B mouths of pumping hole check valve 1-4
Accumulator 2-1 and oil inlet and oil return hydraulic control one-way valve 2-2 that road is connected.The accumulator 2-1 is used for what is flowed back when storage platform is descending
Hydraulic oil, realizes energy regenerating；The control port K's and oil inlet and oil return solenoid directional control valve 2-3 of the oil inlet and oil return hydraulic control one-way valve 2-2
P mouths are connected, fluid turnover accumulator in hydraulic system in both controls；The A mouths of oil inlet and oil return hydraulic control one-way valve 2-2 are emptied list with anti-
B mouths, the inlet port of hydraulic pump 2-7 to valve 2-4 is connected with the oil-out of hydraulic motor 2-8, installs the anti-check valve 2-4 that is emptied and prevents
Only hydraulic pump 2-7 is emptied；The input shaft mechanical connection of frequency control motor 2-6 and hydraulic pump 2-7, the generator 2-9 and liquid
The output shaft of pressure motor 2-8 is mechanically connected, oil-out and safety valve 2-5, the A of lifting solenoid directional control valve 2-10 of hydraulic pump 2-7
Mouth is connected, and the oil-in of hydraulic motor 2-8 is connected with the B mouths of lifting solenoid directional control valve 2-10.Wherein, safety valve 2-5 control into
Enter the maximum pressure of hydraulic cylinder fluid, the safety of safeguards system；Lifting solenoid directional control valve 2-10 is used for controlling the fortune of hoistable platform
Line direction；
As shown in figure 4, described hand-operated lifting loop 3 includes passing through pipeline phase with the P mouths of lifting solenoid directional control valve 2-10
Hydraulic hand-pump 3-1 even and Manual descending reversal valve 3-2.Hydraulic hand-pump 3-1 includes filter, manual pump and unidirectional
Valve, Manual descending reversal valve 3-2 are bi-bit bi-pass hand-operated direction valve.
As shown in fig. 6, described locking loop 4-3 includes locking hydraulic control one-way valve 4-32, with locking hydraulic control one-way valve 4-
The locking solenoid directional control valve 4-31 that 32 control port K is connected, the unblock manual reverse of direction in parallel with locking hydraulic control one-way valve 4-32
Valve 4-33.Wherein, lock hydraulic control one-way valve 4-32 be used for hoistable platform it is static when, make hydraulic cylinder 5 lock pressurize；Locking electromagnetism is changed
It is used for when platform is descending, unlocking locking hydraulic control one-way valve 4-32 to valve 4-31；Unblock hand-operated direction valve 4-33 is used for system and event occurs
Unblock locking hydraulic control one-way valve 4-32 before Manual descending platform during barrier.
Embodiment 2, substantially the same manner as Example 1, mutually exist together summary, and difference is the synchrolock for driving two hydraulic cylinders 5
Tight loop.As shown in fig. 7, driving the synchronous locking loop 4 of three hydraulic cylinders to include the turnover with lifting solenoid directional control valve 2-10
Mouth P is 1 by the split ratio that pipeline is connected:The diffluence pass of 1 flow divider-combiner 4-1, flow divider-combiner 4-1 is watched with electro-hydraulic respectively
Take valve 4-2 to be connected with locking loop 4-3, lock loop 4-3 and be connected with the rodless cavity of corresponding hydraulic cylinder 5.Wherein, through shunting
Than for 1:After 1 flow divider-combiner 4-1, fluid is divided into two parts of roughly equal turnover locking loop 4-3 of flow and hydraulic pressure
Cylinder 5, what electrohydraulic servo valve was used for further adjusting each oil cylinder enter outflow, realize high-precise synchronization.
Embodiment 3, substantially the same manner as Example 1, mutually exist together summary, and difference is to drive the synchronous locking of four hydraulic cylinders
Loop.As shown in figure 8, driving the synchronous locking loop 4 of four hydraulic cylinders to include the import and export P with lifting solenoid directional control valve 2-10
It is 1 by the split ratio that pipeline is connected:The shunting outlet of 1 flow divider-combiner 4-1, flow divider-combiner 4-1 is watched with electro-hydraulic respectively
It is 1 to take valve 4-2 and two split ratios:1 flow divider-combiner II is connected, the diffluence pass of flow divider-combiner II respectively with electro-hydraulic servo
Valve II is connected with locking loop 4-3.Locking loop 4-3 is connected with the rodless cavity of corresponding hydraulic cylinder 5.Wherein, divide through twice
After stream, fluid is divided into roughly equal four parts turnover locking loop 4-3 of flow and hydraulic cylinder 5, electrohydraulic servo valve be used for into
One step section each oil cylinder enters outflow, realizes high-precise synchronization.
Embodiment 4, substantially the same manner as Example 1, mutually exist together summary, and difference is to drive the synchronous locking of six hydraulic cylinders
Loop.As shown in figure 9, driving the synchronous locking loop 4 of six hydraulic cylinders to include the import and export P with lifting solenoid directional control valve 2-10
It is 1 by the split ratio that pipeline is connected:The shunting outlet of 1 flow divider-combiner 4-1, flow divider-combiner 4-1 is watched with electro-hydraulic respectively
It is 1 to take valve 4-2 and two split ratios:2 flow divider-combiner II is connected, the A mouths of flow divider-combiner II and the A of electrohydraulic servo valve II
Mouth is connected with locking loop 4-3, and the B mouths of flow divider-combiner II are 1 with the B mouths of electrohydraulic servo valve II and split ratio:1 shunting collection
The P mouths of stream valve III are connected, and the diffluence pass of flow divider-combiner III is connected with locking loop II respectively at electrohydraulic servo valve III.Lock back
Road 4-3 is connected with the rodless cavity of corresponding hydraulic cylinder 5.Wherein, after shunting, fluid is divided into roughly equal six of flow
Part turnover locking loop 4-3 and hydraulic cylinder 5, what electrohydraulic servo valve was used for further adjusting each oil cylinder enter outflow, realize high-precision
Degree is synchronous.
The elevating method of the multi-cylinder synchronous efficient energy-saving hydraulic lifting system of the present invention, comprises the following steps that：
1. hoistable platform runs up：After control system receives up-on command, oil inlet and oil return solenoid directional control valve 2-3 obtains electric,
Unblock oil inlet and oil return hydraulic control one-way valve 2-2, makes entrance B and the outlet A conductings of oil inlet and oil return hydraulic control one-way valve 2-2, in accumulator 2-1
Hydraulic oil enters hydraulic pump 2-7 produces driving force squares under oil pressure effect；Meanwhile, control system control frequency control motor 2-6,
Using variable frequency volume speed governing, the pressure and flow of hydraulic pump 2-7 output settings is made, is realized energy-efficient；Hydraulic oil is through lifting
The rodless cavity of hydraulic cylinder 5 is entered after solenoid directional control valve 2-10, flow divider-combiner 4-1 and locking hydraulic control one-way valve 4-32, makes lifting
Platform 6 runs up；
2. hoistable platform is run downwards：After control system receives downlink command, locking solenoid directional control valve 4-31 obtains electric, solves
Lock locking hydraulic control one-way valve 4-32, turns on the outlet B and entrance A mouth of locking hydraulic control one-way valve 4-32；Lifting solenoid directional control valve
2-10 obtains electric, and the deadweight of hoistable platform 6 makes the rodless cavity hydraulic oil of hydraulic cylinder 5 flow back, through locking hydraulic control one-way valve 4-32, dividing
Stream combiner valve 4-1 and lifting solenoid directional control valve 2-10 rear-guard hydrodynamic pressure motors 2-8 are rotated, and hoistable platform 6 is run downwards；Liquid
Pressure motor 2-8 drives generator 2-9 to rotate and generates electricity, and realizes the once recovery of energy；Export from the oil-out of hydraulic motor 2-8
Hydraulic oil is saved in accumulator 2-1 through oil inlet and oil return hydraulic control one-way valve 2-2, realizes the secondary recovery of energy；
3. multi-cylinder synchronization：Hydraulic oil passes in and out the flow of each hydraulic cylinder 5 after flow divider-combiner 4-1 shuntings
It is roughly equal；According to the real-time angular signal of the obliquity sensor 6-1 feedbacks on hoistable platform 6, control system control is electro-hydraulic to be watched
Valve 4-2 is taken, the fluid on the in-line of input flow rate big hydraulic cylinder 5 is discharged into oil return box from electrohydraulic servo valve 4-2, realized many
Cylinder precise synchronization, so that ensure 6 real-time level of hoistable platform；
4. hoistable platform is adjusted manually：When hydraulic lifting system occurs power-off or failure, hoistable platform 6 is adjusted manually.
Pull unblock hand-operated direction valve 4-33 first manually to unlock to left position；
If desired hoistable platform 6 is lifted, hydraulic oil is sent into system by manual actuation hydraulic hand-pump 3-1, and hydraulic oil is passed through
Flow divider-combiner 4-1 and unblock hand-operated direction valve 4-33 enter 5 rodless cavity of hydraulic cylinder, hoistable platform 6 is increased；
If desired decline hoistable platform 6, Manual descending reversal valve 3-2 is pulled manually to left position, in 5 rodless cavity of hydraulic cylinder
Hydraulic oil flows back to fuel tank through unblock hand-operated direction valve 4-33, flow divider-combiner 4-1 and Manual descending reversal valve 3-2, makes lifting
Platform 6 declines；
Hoistable platform 6 is adjusted to desired location, hand-reset unlocks hand-operated direction valve 4-33 and Manual descending reversal valve
3-2 locks hoistable platform 6 to right position.
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright content is made, or other related technical fields are directly or indirectly used in,
Include in the same manner within the scope of the present invention.
Claims (4)
1. a kind of multi-cylinder synchronous efficient energy-saving hydraulic lifting system, it is characterised in that：It includes feed circuit（1）, volumetric speed control
And energy recovery circuit（2）, hand-operated lifting loop（3）, synchronous locking loop（4）, be supported in hoistable platform（6）Lower section it is multiple
Hydraulic cylinder（5）Be installed on hoistable platform（6）On obliquity sensor（6-1）；Described feed circuit（1）With volumetric speed control and
Energy recovery circuit（2）Input be connected, the volumetric speed control and energy recovery circuit（2）Output end lock back with synchronous
Road（4）Input pipeline is connected, volumetric speed control and energy recovery circuit（2）With synchronous locking loop（4）Connect on connected pipeline
There is hand-operated lifting loop（3）, the plurality of hydraulic cylinder（5）A locking loop is connected with（4-3）, lock loop（4-3）Respectively
It is connected with flow divider-combiner（4-1）And electrohydraulic servo valve（4-2）, by locking loop（4-3）, flow divider-combiner（4-1）Watch with electro-hydraulic
Take valve（4-2）Constitute to multiple hydraulic cylinders（5）Synchronous locking loop（4）；
Described feed circuit（1）Including motor（1-2）, and motor（1-2）Connected slippage pump（1-3）, slippage pump（1-
3）Entrance through filter（1-1）It is connected with fuel tank pipeline, slippage pump（1-3）Outlet A Jing pumping hole check valves（1-4）With volume
Speed governing and energy recovery circuit（2）Pipeline is connected, pumping hole check valve（1-4）Outlet B pipelines be provided with communicate with fuel tank overflow
Stream valve（1-5）；
Described volumetric speed control and energy recovery circuit（2）Including accumulator（2-1）, oil inlet and oil return hydraulic control one-way valve（2-2）, enter back
Electromagnetic oil reversal valve（2-3）, safety valve（2-5）, frequency control motor（2-6）, hydraulic pump（2-7）, hydraulic motor（2-8）, send out
Motor（2-9）With lifting solenoid directional control valve（2-10）；Described accumulator（2-1）With oil inlet and oil return hydraulic control one-way valve（2-2）With pump
Mouth check valve（1-4）Outlet B pipelines be connected, oil inlet and oil return hydraulic control one-way valve（2-2）Control port K and oil inlet and oil return electromagnetic switch
Valve（2-3）Break-make mouth P be connected, oil inlet and oil return hydraulic control one-way valve（2-2）Outlet A be emptied check valve with anti-（2-4）Entrance B,
Hydraulic pump（2-7）Inlet port and hydraulic motor（2-8）Oil-out be connected, described frequency control motor（2-6）With hydraulic pressure
Pump（2-7）Input shaft be mechanically connected, described generator（2-9）With hydraulic motor（2-8）Output shaft be mechanically connected, hydraulic pressure
Pump（2-7）Oil-out and safety valve（2-5）, lifting solenoid directional control valve（2-10）Entrance A be connected, hydraulic motor（2-8）'s
Oil-in and lifting solenoid directional control valve（2-10）Outlet B be connected；
Described hand-operated lifting loop（3）Including with lifting solenoid directional control valve（2-10）Import and export P pipelines be connected manual liquid
Press pump（3-1）, and hydraulic hand-pump（3-1）The Manual descending reversal valve that outlet is connected（3-2）；
Described synchronous locking loop（4）Including with lifting solenoid directional control valve（2-10）Import and export（P）The shunting that pipeline is connected
Combiner valve（4-1）；The flow divider-combiner（4-1）Diffluence pass A and electrohydraulic servo valve（4-2）Oil-in A be connected, shunting collection
Stream valve（4-1）Diffluence pass B and electrohydraulic servo valve（4-2）Oil-in B be connected；The locking loop（4-3）Entrance with point
Stream combiner valve（4-1）Diffluence pass be connected, lock loop（4-3）Outlet and corresponding hydraulic cylinder（5）Rodless cavity be connected.
2. multi-cylinder synchronous efficient energy-saving hydraulic lifting system according to claim 1, it is characterised in that：Described hydraulic cylinder
（5）For two, three, four, six, eight or ten.
3. multi-cylinder synchronous efficient energy-saving hydraulic lifting system according to claim 1, it is characterised in that：Described locking is returned
Road（4-3）Including locking hydraulic control one-way valve（4-32）, and locking hydraulic control one-way valve（4-32）Control port（K）Connected locking
Solenoid directional control valve（4-31）, and locking hydraulic control one-way valve（4-32）Unblock hand-operated direction valve in parallel（4-33）.
4. the multi-cylinder synchronous efficient energy-saving hydraulic lifting method of system according to claim 3, it is characterised in that including as follows
Step：
1. hoistable platform runs up：Control oil inlet and oil return solenoid directional control valve（2-3）It is powered, opens oil inlet and oil return hydraulic control one-way valve（2-
2）, oil inlet and oil return hydraulic control one-way valve（2-2）Entrance B with outlet A conducting, accumulator（2-1）Interior hydraulic oil is under oil pressure effect
Into hydraulic pump（2-7）Produces driving force square；Meanwhile, control frequency control motor（2-6）Variable frequency volume speed governing is carried out, hydraulic pressure is made
Pump（2-7）The pressure and flow of output setting, hydraulic oil is through lifting solenoid directional control valve（2-10）, flow divider-combiner（4-1）With
Locking hydraulic control one-way valve（4-32）Hydraulic cylinder is entered afterwards（5）Rodless cavity, make hoistable platform（6）Run up；
2. hoistable platform is run downwards：Control locking solenoid directional control valve（4-31）It is powered, opens locking hydraulic control one-way valve（4-32）,
Make locking hydraulic control one-way valve（4-32）Outlet B and entrance A turn on；Lifting solenoid directional control valve（2-10）Obtain electric, hoistable platform（6）
Deadweight make hydraulic cylinder（5）Rodless cavity hydraulic oil backflow, through locking hydraulic control one-way valve（4-32）, flow divider-combiner（4-1）
With lifting solenoid directional control valve（2-10）Rear-guard hydrodynamic pressure motor（2-8）Rotate, make hoistable platform（6）Run downwards；Hydraulic motor
（2-8）Drive generator（2-9）Rotate and generate electricity, realize the once recovery of energy；From hydraulic motor（2-8）Oil-out output
Hydraulic oil is through oil inlet and oil return hydraulic control one-way valve（2-2）Savings are in accumulator（2-1）In, realize the secondary recovery of energy；
3. multi-cylinder synchronization：Hydraulic oil is through flow divider-combiner（4-1）After shunting, each hydraulic cylinder is passed in and out（5）Flow
It is roughly equal；According to hoistable platform（6）On obliquity sensor（6-1）The real-time angular signal of feedback, controls electrohydraulic servo valve
（4-2）By input hydraulic cylinder（5）Fluid Jing electrohydraulic servo valves on the larger in-line of flow（4-2）Discharge oil return box, realizes
Multi-cylinder precise synchronization, so that ensure hoistable platform（6）Real-time level；
4. hoistable platform is adjusted manually：When hydraulic lifting system occurs power-off or failure, hoistable platform (6) is adjusted manually, will
Unblock hand-operated direction valve（4-33）Remove to left position and unlock；
If desired hoistable platform (6), manual actuation hydraulic hand-pump are lifted（3-1）Hydraulic oil is sent into into system, hydraulic oil is passed through
Flow divider-combiner（4-1）With unblock hand-operated direction valve（4-33）Into hydraulic cylinder（5）Rodless cavity, makes hoistable platform（6）Rise；
If desired decline hoistable platform (6), pull Manual descending reversal valve manually（3-2）To left position, hydraulic cylinder（5）In rodless cavity
Hydraulic oil through unblock hand-operated direction valve（4-33）, flow divider-combiner（4-1）With Manual descending reversal valve（3-2）Flow back to oil
Case, makes hoistable platform（6）Decline；
Adjust hoistable platform（6）To desired location, hand-reset unblock hand-operated direction valve（4-33）With Manual descending reversal valve
（3-2）To right position, hoistable platform is made（6）Locking.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510706232.3A CN105179343B (en) | 2015-10-27 | 2015-10-27 | Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method |
| RU2017106309A RU2657525C1 (en) | 2015-10-27 | 2015-12-22 | Multi-cylinder synchronous energy efficient high-performance hydraulic lifting system and method of its operation |
| CA2955713A CA2955713C (en) | 2015-10-27 | 2015-12-22 | A multi-cylinder synchronous energy-saving and efficient hydraulic lift system and method thereof |
| PCT/CN2015/098171 WO2017071027A1 (en) | 2015-10-27 | 2015-12-22 | Multi-cylinder synchronized, power-saving, high-efficiency hydraulic lifting/lowering system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510706232.3A CN105179343B (en) | 2015-10-27 | 2015-10-27 | Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method |
Publications (2)
| Publication Number | Publication Date |
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| CN105179343A CN105179343A (en) | 2015-12-23 |
| CN105179343B true CN105179343B (en) | 2017-03-22 |
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|---|---|---|---|
| CN201510706232.3A Expired - Fee Related CN105179343B (en) | 2015-10-27 | 2015-10-27 | Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN105179343B (en) |
| CA (1) | CA2955713C (en) |
| RU (1) | RU2657525C1 (en) |
| WO (1) | WO2017071027A1 (en) |
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| US3754394A (en) * | 1971-12-02 | 1973-08-28 | Hyster Co | Hydraulic control system for electric lift truck |
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| JPH11108181A (en) * | 1997-09-30 | 1999-04-20 | Sumitomo Eaton Hydraulics Co Ltd | Drive control system for vehicle having hydraulic motor for running and fluid control device with flow dividing function |
| US6000315A (en) * | 1998-05-04 | 1999-12-14 | Deere & Company | Lift control for implement frame |
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| RU94220U1 (en) * | 2009-12-21 | 2010-05-20 | Государственное образовательное учреждение высшего профессионального образования "Сибирская государственная автомобильно-дорожная академия (СибАДИ)" | DEVICE FOR AUTOMATIC LEVELING OF THE SUPPORT PLATFORM IN THE HORIZONTAL PLANE |
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| JP6084972B2 (en) * | 2011-08-12 | 2017-02-22 | イートン コーポレーションＥａｔｏｎ Ｃｏｒｐｏｒａｔｉｏｎ | System and method for recovering energy and leveling a load on a hydraulic system |
| CN203796641U (en) * | 2014-02-19 | 2014-08-27 | 华中科技大学 | Stepless speed regulating hydraulic system of hydraulic machine |
| CN104925694A (en) * | 2015-07-08 | 2015-09-23 | 安徽合力股份有限公司 | Hydraulic lifting platform system capable of achieving synchronous oil cylinder lifting |
| CN205136183U (en) * | 2015-10-27 | 2016-04-06 | 中国矿业大学 | Energy -conserving high -efficient hydraulic lifting system of multi -cylinder synchronization |
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2015
- 2015-10-27 CN CN201510706232.3A patent/CN105179343B/en not_active Expired - Fee Related
- 2015-12-22 RU RU2017106309A patent/RU2657525C1/en not_active IP Right Cessation
- 2015-12-22 WO PCT/CN2015/098171 patent/WO2017071027A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114055A (en) * | 2018-09-25 | 2019-01-01 | 北京工业大学 | A kind of Combined hydraulic support system for marine propeller blade processing |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2955713A1 (en) | 2017-04-27 |
| CN105179343A (en) | 2015-12-23 |
| WO2017071027A1 (en) | 2017-05-04 |
| RU2657525C1 (en) | 2018-06-14 |
| CA2955713C (en) | 2019-05-14 |
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