CN105366579A - Crane and hydraulic control system thereof - Google Patents
Crane and hydraulic control system thereof Download PDFInfo
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- CN105366579A CN105366579A CN201510849016.4A CN201510849016A CN105366579A CN 105366579 A CN105366579 A CN 105366579A CN 201510849016 A CN201510849016 A CN 201510849016A CN 105366579 A CN105366579 A CN 105366579A
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- 238000004146 energy storage Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 14
- 230000001172 regenerating effect Effects 0.000 claims description 50
- 238000011084 recovery Methods 0.000 claims description 36
- 239000003638 chemical reducing agent Substances 0.000 claims description 33
- 230000007423 decrease Effects 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 93
- 239000010720 hydraulic oil Substances 0.000 description 20
- 238000005381 potential energy Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The invention provides a crane and a hydraulic control system thereof, wherein the hydraulic control system comprises a main valve and a main hoisting hydraulic system connected with the main valve, the main hoisting hydraulic system comprises a hoisting motor, and the hydraulic control system also comprises: and the energy storage device is connected with the descending side working oil port of the winch motor so as to store pressure oil flowing out of the winch motor in the winch descending process. The hydraulic control system solves the problem of low energy utilization rate in the crane in the prior art.
Description
Technical field
The present invention relates to engineering machinery field, in particular to a kind of hoisting crane and hydraulic control system thereof.
Background technology
At present, in the prior art, as shown in Figure 1, the operation that telescopic hydraulic system 1, variable amplitude hydraulic system 2, master/slave hoisting hydraulic system 3, rotary control valve 4 and the pilot-actuated valve 5 in the hydraulic control system of hoisting crane carries out must rely on engine drive hydraulic power valve.
But do separately propulsion source for hydraulic efficiency pressure system by driving engine and provide power, driving engine energy consumption is comparatively large, and can not being effectively utilized of elevator potential energy, the capacity usage ratio of hoisting crane is lower.
Summary of the invention
Main purpose of the present invention is to provide a kind of hoisting crane and hydraulic control system thereof, to solve the lower problem of capacity usage ratio in hoisting crane of the prior art.
To achieve these goals, according to an aspect of the present invention, provide a kind of hydraulic control system of hoisting crane, comprise main valve and be connected to the master winch hydraulic efficiency pressure system on main valve, master winch hydraulic efficiency pressure system comprises hoist motor, hydraulic control system also comprises: energy accumulating device, and energy accumulating device is connected to store in elevator decentralization process from the pressure oil that hoist motor flows out with the decline side actuator port of hoist motor.
Further, energy accumulating device comprises: accumulator package, and accumulator package can be connected to break-make with the decline side actuator port of hoist motor.
Further, accumulator package comprises multiple energy storage, and the logical hydraulic fluid port of each energy storage is all connected with the oil inlet of accumulator package.
Further, energy accumulating device also comprises: energy recovery valve, and energy recovery valve is arranged on the hydraulic tubing between main valve and hoist motor, and energy recovery valve is connected to be communicated with accumulator package and hoist motor with accumulator package.
Further, energy recovery valve is pressure-gradient control valve, and the oil inlet of pressure-gradient control valve is connected with the decline side actuator port of hoist motor, and the return opening of pressure-gradient control valve is connected with main valve, and the preferential oil outlet of pressure-gradient control valve is connected with accumulator package.
Further, the hydraulic tubing between energy recovery valve and accumulator package is provided with the first back pressure valve, the oil inlet of the first back pressure valve is connected with energy recovery valve.
Further, hydraulic control system also comprises energy regenerating motor, and the rotating shaft of energy regenerating motor is connected with the output shaft of the driving engine of hydraulic control system, and the oil inlet of energy regenerating motor can be connected to break-make with accumulator package.
Further, hydraulic control system also comprises: reducer unit, and the oil outlet of reducer unit is communicated with the return opening of the oil inlet of reducer unit or reducer unit; The oil outlet of reducer unit is connected with the control port of energy regenerating motor, and the oil inlet of reducer unit is connected with the pilot-actuated valve of hydraulic control system, and the return opening of reducer unit is connected with the hydraulic reservoir of hydraulic control system.
Further, hydraulic control system also comprises: change-over valve, change-over valve is arranged on the hydraulic tubing between accumulator package and energy regenerating motor, and the oil inlet of change-over valve is connected with accumulator package, and the oil outlet of change-over valve is connected with the oil inlet of energy regenerating motor.
Further, hydraulic control system also comprises: Fill valve, and the oil inlet of Fill valve is connected with the return opening of main valve, and the oil outlet of Fill valve is connected on the hydraulic tubing between change-over valve and energy regenerating motor.
Further, hydraulic control system also comprises the second back pressure valve, the oil inlet of the second back pressure valve is connected with the return opening of main valve, and the oil outlet of the second back pressure valve is connected with the hydraulic reservoir of hydraulic control system, and the oil inlet of Fill valve is connected on the hydraulic tubing between main valve and the second back pressure valve.
Further, hydraulic control system also comprises by pass valve, and the oil inlet of by pass valve is connected with accumulator package, and the oil outlet of by pass valve is connected with the hydraulic reservoir of hydraulic control system.
According to a further aspect in the invention, provide a kind of hoisting crane, comprise hydraulic control system, hydraulic control system is the hydraulic control system of above-mentioned hoisting crane.
The hydraulic control system of the hoisting crane in the present invention comprises energy accumulating device, because energy accumulating device is connected with the decline side actuator port of the hoist motor of this hydraulic control system, like this, when elevator is in decentralization process, elevator potential energy is just converted into hydraulic energy and is stored in energy accumulating device, and then decrease the energy ezpenditure of hoisting crane, solve the problem that capacity usage ratio in hoisting crane of the prior art is lower.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of the embodiment of the hydraulic control system according to hoisting crane of the prior art; And
Fig. 2 shows the structural representation of the embodiment of the hydraulic control system of hoisting crane of the present invention.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, main valve; 20, master winch hydraulic efficiency pressure system; 21, hoist motor; 30, accumulator package; 31, energy storage; 40, energy recovery valve; 50, the first back pressure valve; 60, energy regenerating motor; 70, driving engine; 80, reducer unit; 90, change-over valve; 110, pilot-actuated valve; 120, hydraulic reservoir; 130, Fill valve; 140, the second back pressure valve; 150, by pass valve; 160, radiator; 170, oil filter; 181, telescopic hydraulic system; 182, variable amplitude hydraulic system; 183, secondary hoisting hydraulic system; 191, rotary control valve; 192, Hydraulic slewing system; 210, controllable capacity pump; 220, the first gear type pump; 230, the second gear type pump.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present embodiment provides a kind of hydraulic control system of hoisting crane, please refer to Fig. 2, the master winch hydraulic efficiency pressure system 20 that this hydraulic control system comprises main valve 10 and is connected on main valve 10, master winch hydraulic efficiency pressure system 20 comprises hoist motor 21, hydraulic control system also comprises: energy accumulating device, and energy accumulating device is connected to store in elevator decentralization process from the pressure oil that hoist motor 21 flows out with the decline side actuator port of hoist motor 21.
The hydraulic control system of the hoisting crane in the present embodiment comprises energy accumulating device, because energy accumulating device is connected with the decline side actuator port of the hoist motor 21 of this hydraulic control system, like this, when elevator is in decentralization process, elevator potential energy is just converted into hydraulic energy and is stored in energy accumulating device, and then decrease the energy ezpenditure of hoisting crane, solve the problem that capacity usage ratio in hoisting crane of the prior art is lower.
The decline side actuator port of the hoist motor 21 in the present embodiment refers to that the hydraulic fluid port carrying out oil extraction of hoist motor 21 in elevator decentralization process, the upthrow side actuator port of hoist motor 21 refer to the hydraulic fluid port carrying out oil extraction of hoist motor 21 in elevator uphill process.
In the present embodiment, energy accumulating device comprises: accumulator package 30, and accumulator package 30 can be connected to break-make with the decline side actuator port of hoist motor 21.
The present embodiment comprises accumulator package 30 by making energy accumulating device, can be stored in this accumulator package 30 by the pressure oil that hoist motor 21 is discharged more easily.This accumulator package 30 comprises oil inlet and return opening, and the oil inlet of accumulator package 30 can be connected to break-make with the decline side actuator port of hoist motor 21, and the return opening of energy storage 31 is connected with by pass valve 150.
In the present embodiment, accumulator package 30 comprises multiple energy storage 31, and the logical hydraulic fluid port of each energy storage 31 is all connected with the oil inlet of accumulator package 30.
Energy storage 31 in the present embodiment is for storing the hydraulic energy in elevator decentralization process, and the quantity of the energy storage 31 in accumulator package 30 is four, but is not limited to four.
Multiple energy storages 31 in the present embodiment are in parallel successively, and the logical hydraulic fluid port of each energy storage 31 is all connected with the oil inlet of accumulator package 30, like this, in elevator decentralization process, the pressure oil that hoist motor 21 is discharged can flow in the energy storage 31 that is connected with the oil inlet of accumulator package 30 at first through the oil inlet of accumulator package 30, then flow to successively in each energy storage 31, and then pressure oil is deposited in each energy storage 31.
In the present embodiment, energy accumulating device also comprises: energy recovery valve 40, energy recovery valve 40 is arranged on the hydraulic tubing between main valve 10 and hoist motor 21, and energy recovery valve 40 is connected with accumulator package 30 to be communicated with accumulator package 30 and hoist motor 21.
The present embodiment, by arranging energy recovery valve 40, can control the break-make between hoist motor 21 and accumulator package 30 more easily.
In the present embodiment, energy recovery valve 40 is pressure-gradient control valve, and the oil inlet of pressure-gradient control valve is connected with the decline side actuator port of hoist motor 21, and the return opening of pressure-gradient control valve is connected with main valve 10, and the preferential oil outlet of pressure-gradient control valve is connected with accumulator package 30.
Preferentially flow in accumulator package 30 to make the pressure oil flowed out in hoist motor 21, energy recovery valve 40 in the present embodiment has A, B, P' tri-actuator ports, when utilizing pressure-gradient control valve as energy recovery valve 40, the preferential oil outlet of this pressure-gradient control valve is P' mouth, return opening be A mouth and oil inlet is B mouth, and the control port of this energy recovery valve 40 is connected with the upthrow side actuator port of hoist motor 21.The oil inlet of pressure-gradient control valve herein, preferential oil outlet and return opening are into and out of oily situation for each actuator port in elevator decentralization process.
In the present embodiment, the oil inlet hydraulic tubing between energy recovery valve 40 and accumulator package 30 being provided with the first back pressure valve 50, first back pressure valve 50 is connected with energy recovery valve 40.
The present embodiment, by arranging the first back pressure valve 50, can prevent the pressure oil in accumulator package 30 from oppositely flowing in energy recovery valve 40.
At elevator in decentralization process, the hydraulic oil flowed out from the C mouth (decline side actuator port) of hoist motor 21 enters energy recovery valve 40 through the B mouth of energy recovery valve 40, elevator potential energy is hydraulic energy by energy recovery valve 40, and preferentially flow out from P' mouth, be stored in accumulator package 30 through the first back pressure valve 50.After in each energy storage 31 of accumulator package 30, hydraulic oil is full of, the hydraulic oil in energy recovery valve 40 flow in hydraulic reservoir 120 through the A mouth of energy recovery valve 40, the A4 mouth of main valve 10, T1 mouth.
In the present embodiment, hydraulic control system also comprises energy regenerating motor 60, and the rotating shaft of energy regenerating motor 60 is connected with the output shaft of the driving engine 70 of hydraulic control system, and the oil inlet of energy regenerating motor 60 can be connected to break-make with accumulator package 30.
The rotating shaft of the energy regenerating motor 60 in the present embodiment is connected with the output shaft of driving engine 70, and driving engine 70 is for driving the Hydraulic Pump in hydraulic control system, and namely the output shaft of driving engine 70 is connected with each Hydraulic Pump.
In the present embodiment, the hydraulic power unit of the hydraulic control system of this hoisting crane comprises driving engine 70 and corresponding Hydraulic Pump, Hydraulic Pump, by controllable capacity pump 210, first gear type pump 220 and the second gear type pump 230, now increases energy regenerating motor 60 newly again in hydraulic power unit.The output shaft of driving engine 70 is axis, and the rotating shaft of each Hydraulic Pump is all connected with the output shaft of this driving engine 70 with the rotating shaft of energy regenerating motor 60.
When accumulator package 30 is not to this energy regenerating motor 60 delivery pressure oil, driving engine 70 drives energy regenerating motor 60 to dally; When accumulator package 30 is oily to delivery pressure in energy regenerating motor 60, the hydraulic energy transfer of pressure oil is the mechanical energy of its rotating shaft by energy regenerating motor 60, the moment of torsion of energy regenerating motor 60 is sent on the output shaft of driving engine 70, each Hydraulic Pump is driven to rotate, counteract the acting of the driving engine 70 of a part, solve energy consumption.
In the present embodiment, hydraulic control system also comprises: reducer unit 80, and the oil outlet of reducer unit 80 is communicated with the return opening of the oil inlet of reducer unit 80 or reducer unit 80; The oil outlet of reducer unit 80 is connected with the control port of energy regenerating motor 60, and the oil inlet of reducer unit 80 is connected with the pilot-actuated valve 110 of hydraulic control system, and the return opening of reducer unit 80 is connected with the hydraulic reservoir 120 of hydraulic control system.
In order to regulate the oil drain quantity of this energy regenerating motor 60 more easily, the present embodiment is connected a hydraulic tubing at the pilot-actuated valve 110 of this hydraulic control system with between this energy regenerating motor 60, and installs reducer unit 80 on this hydraulic tubing.
Reducer unit 80 in the present embodiment also comprises control port K mouth, and this control port is connected on the hydraulic tubing between accumulator package 30 and energy regenerating motor 60.As shown in Figure 2, the oil outlet of reducer unit 80 is G mouth, and the oil inlet of reducer unit 80 is P4 mouth, and the return opening of reducer unit 80 is P' mouth.
As shown in Figure 2, have in the hydraulic tubing between accumulator package 30 and energy regenerating motor 60 pressure oil by time, there is pressure in the K mouth place of reducer unit 80, makes G mouth and the conducting of P4 mouth of reducer unit 80.E mouth due to pilot-actuated valve 110 has a constant hydraulic oil source all the time, now, the hydraulic oil source at the E mouth place of this pilot-actuated valve 110 flows to the P4 mouth of reducer unit 80, and pressure oil exports from G mouth after decompression, and finally this pressure oil flows to the control port LW mouth of energy regenerating motor 60.Wherein, the G mouth pressure oil size of reducer unit 80 and K mouth pressure proportional relation, the hydraulic energy that K mouth pressure larger explanation energy recovery valve 40 exports is more.
The present embodiment is newly-increased hydraulic variable motor (energy regenerating motor 60) in hydraulic power unit, this hydraulic variable motor initializaing variable is 0ml/rr, the size of the work discharge capacity of hydraulic variable motor is relevant with the pressure size of its outside control mouth LW mouth, the operation pressure (i.e. the G mouth pressure of reducer unit 80) of LW mouth is larger, hydraulic variable motor work discharge capacity is larger, and exportable moment of torsion is just also larger.When the P' of energy recovery valve 40 exports without pressure oil, the G mouth of reducer unit 80 exports without pressure oil, and now the minimum work discharge capacity of hydraulic variable motor is 0ml/rr.
In the present embodiment, hydraulic control system also comprises: change-over valve 90, change-over valve 90 is arranged on the hydraulic tubing between accumulator package 30 and energy regenerating motor 60, the oil inlet of change-over valve 90 is connected with accumulator package 30, and the oil outlet of change-over valve 90 is connected with the oil inlet of energy regenerating motor 60.
The present embodiment, by arranging change-over valve 90, can control the break-make of the hydraulic oil between accumulator package 30 and energy regenerating motor 60 more easily.
In the present embodiment, hydraulic control system also comprises: Fill valve 130, and the oil inlet of Fill valve 130 is connected with the return opening of main valve 10, and the oil outlet of Fill valve 130 is connected on the hydraulic tubing between change-over valve 90 and energy regenerating motor 60.
During owing to driving energy regenerating motor 60 to dally when driving engine 70, energy regenerating motor 60 does not have hydraulic oil, and now, the dry friction in energy regenerating motor 60 is comparatively serious.In order to reduce the damage of dry friction to energy regenerating motor 60, the present embodiment utilizes Fill valve 130 to be introduced in energy regenerating motor 60 by the hydraulic oil in the oil return circuit of this hydraulic control system.
When energy recovery valve 40 P' without pressure oil export and when also exporting without pressure oil in accumulator package 30, energy regenerating motor 60 is in minimum injection rate, it is driven to operate by driving engine 70, for the leakage that the dry run of makeup energy recovery motor 60 produces, hydraulic oil in hydraulic oil-returning pipeline enters in this energy regenerating motor 60 through Fill valve 130, prevents from causing damage because of the running of this motor dry friction.Energy regenerating motor 60 in the present embodiment is hydraulic variable motor.
Preferably, this Fill valve 130 is check valve.Like this, the hydraulic oil in energy regenerating motor 60 can be prevented to be back in hydraulic reservoir 120 through this Fill valve 130.
In the present embodiment, hydraulic control system also comprises the second back pressure valve 140, the oil inlet of the second back pressure valve 140 is connected with the return opening of main valve 10, the oil outlet of the second back pressure valve 140 is connected with the hydraulic reservoir 120 of hydraulic control system, and the oil inlet of Fill valve 130 is connected on the hydraulic tubing between main valve 10 and the second back pressure valve 140.Like this, can guarantee that the hydraulic oil in system oil return pipeline has certain pressure, and the second back pressure valve 140 response pressure is greater than Fill valve 130 response pressure.
In order to the hydraulic oil at the oil inlet place ensureing Fill valve 130 has certain pressure, the present embodiment installs the second back pressure valve 140 on the oil return circuit of this hydraulic control system, the oil inlet of Fill valve 130 is connected to the upstream of the second back pressure valve 140.Like this, can ensure that the hydraulic oil in oil return circuit successfully flows in energy regenerating motor 60 through Fill valve 130.
In the present embodiment, hydraulic control system also comprises by pass valve 150, and the oil inlet of by pass valve 150 is connected with accumulator package 30, and the oil outlet of by pass valve 150 is connected with the hydraulic reservoir 120 of hydraulic control system.Like this, the pressure oil in accumulator package 30 can be prevented excessive.
The present embodiment additionally provides a kind of hoisting crane, comprises hydraulic control system, and hydraulic control system is the hydraulic control system of above-mentioned hoisting crane.
Hydraulic lift is that a kind of consumption is large, energy consumption is high, the construction machinery and equipment of discharge difference, therefore studies the energy-conservation of hydraulic lift and has important practical significance when current social energy scarcity and ecological deterioration problem are on the rise.Hydraulic lift is as the typical construction machinery and equipment of one, and the solution for other construction machinery and equipment relevant issues of the same type is offered reference by its energy-conservation research.
For the realistic situation that existing hydraulic lift capacity usage ratio is low, the existing hydraulic efficiency pressure system of the hydraulic control system in the present invention to hydraulic lift is optimized design and mates.Hydraulic control system in the present invention is elevator potential energy recycling hydraulic control system, under the prerequisite of, smooth running controlled, safe, efficient at elevator, gravitional force when recycling elevator is transferred as far as possible, improves crane engine fuel economy.Hydraulic control system in the present embodiment has important theory significance and actual application value in Construction Machinery Energy Saving green technology application aspect.
The present embodiment arranges energy recovery valve 40 in master winch hydraulic efficiency pressure system 20, by the weight gravitional force conversionization hydraulic energy in elevator decentralization process, hydraulic variable motor (energy regenerating motor 60) in Real Time Drive hydraulic power unit, by the controllable capacity pump in hydraulic variable motor Real Time Drive hydraulic power unit and gear type pump, reduce driving engine 70 output torque, thus reduce the energy consumption of driving engine 70, arrive energy-conservation object.
In the present embodiment, when arbitrary system in telescopic hydraulic system 181, variable amplitude hydraulic system 182, secondary hoisting hydraulic system 183, master winch hydraulic efficiency pressure system 20 and rotary control valve 191 has hydraulic oil to export, the F mouth meeting delivery pressure oil sources of pilot-actuated valve 110, make change-over valve 90 be in conducting state, the pressure oil in the hydraulic oil that energy recovery valve 40 exports or accumulator package 30 will drive energy regenerating motor 60 in hydraulic power unit through change-over valve 90.
As shown in Figure 2, actuator port A1 mouth and the B1 mouth of telescopic hydraulic system 181 and main valve 10 are connected, actuator port A2 mouth and the B2 mouth of variable amplitude hydraulic system 182 and main valve 10 are connected, actuator port A3 mouth and the B3 mouth of secondary hoisting hydraulic system 183 and main valve 10 are connected, and actuator port A4 mouth and the B4 mouth of master winch hydraulic efficiency pressure system 20 and main valve 10 are connected.
Hydraulic power unit in the present embodiment is three string pumps, and the controllable capacity pump 210 wherein in three string pumps is telescopic hydraulic system 181, variable amplitude hydraulic system 182, master winch hydraulic efficiency pressure system 20, secondary hoisting hydraulic system 183 provide hydraulic oil source.The control port of controllable capacity pump 210 is connected with the LS mouth of main valve 10, and the oil outlet of controllable capacity pump 210 is connected with the P1 mouth of main valve 10.
Middle pump in three string pumps i.e. the first gear type pump 220 provides hydrodynamic pressure oil sources for rotary control valve 191.Wherein, the oil outlet of the first gear type pump 220 is connected with the oil inlet P 2 of rotary control valve 191, and the oil return inlet T 2 of rotary control valve 191 is connected with hydraulic reservoir 120.
Tail pump in three string pumps i.e. the second gear type pump 230 provides hydrodynamic pressure oil sources for pilot-actuated valve.Wherein, the oil outlet of the second gear type pump 230 is connected with the oil inlet P 3 of pilot-actuated valve 110, and the oil return inlet T 3 of pilot-actuated valve 110 is connected with hydraulic reservoir 120.
In the present embodiment, the normal work that pilot-actuated valve 110 is whole hydraulic efficiency pressure system provides stable control oil sources.The hydraulic oil source that controllable capacity pump 210 exports gives flexible, luffing, master/slave hoisting hydraulic system through main valve 10 reasonable distribution.The hydraulic oil that first gear type pump 220 exports enters Hydraulic slewing system 192 after rotary control valve 191 reasonable distribution.
Oil return circuit in the present embodiment is provided with oil filter 170, it act as and filters the hydraulic oil in hydraulic efficiency pressure system, ensures cleanliness of hydraulic oil.
Oil return circuit in the present embodiment is provided with radiator 160, it act as and makes hydraulic working oil interval in suitable oil temperature, ensures hydraulic efficiency pressure system Effec-tive Function.
Hydraulic control system in the present embodiment is a kind of by elevator potential energy recycling hydraulic control system, under the prerequisite of, smooth running controlled, safe, efficient at elevator, gravitional force when recycling elevator is transferred as far as possible, improves crane engine fuel economy.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
Compared with prior art, the control pressurer system of the hoisting crane in the present invention is by arranging energy recovery valve, accumulator package, energy regenerating motor, heavy load potential energy in elevator decentralization process is absorbed and is converted into hydraulic energy, hydraulic energy driving-energy reclaims motor output torque thus, thus reduction engine output torque, reach the object reducing driving engine energy consumption.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the hydraulic control system of a hoisting crane, comprise main valve (10) and be connected to the master winch hydraulic efficiency pressure system (20) on described main valve (10), described master winch hydraulic efficiency pressure system (20) comprises hoist motor (21), it is characterized in that, described hydraulic control system also comprises:
Energy accumulating device, described energy accumulating device is connected to store in elevator decentralization process from the pressure oil that described hoist motor (21) flows out with the decline side actuator port of described hoist motor (21).
2. hydraulic control system according to claim 1, is characterized in that, described energy accumulating device comprises:
Accumulator package (30), described accumulator package (30) can be connected to break-make with the described decline side actuator port of described hoist motor (21).
3. hydraulic control system according to claim 2, it is characterized in that, described accumulator package (30) comprises multiple energy storage (31), and the logical hydraulic fluid port of energy storage described in each (31) is all connected with the oil inlet of described accumulator package (30).
4. hydraulic control system according to claim 2, is characterized in that, described energy accumulating device also comprises:
Energy recovery valve (40), described energy recovery valve (40) is arranged on the hydraulic tubing between described main valve (10) and described hoist motor (21), and described energy recovery valve (40) is connected with described accumulator package (30) to be communicated with described accumulator package (30) and described hoist motor (21).
5. hydraulic control system according to claim 4, it is characterized in that, described energy recovery valve (40) is pressure-gradient control valve, the oil inlet of described pressure-gradient control valve is connected with the described decline side actuator port of described hoist motor (21), the return opening of described pressure-gradient control valve is connected with described main valve (10), and the preferential oil outlet of described pressure-gradient control valve is connected with described accumulator package (30).
6. hydraulic control system according to claim 4, it is characterized in that, hydraulic tubing between described energy recovery valve (40) and described accumulator package (30) is provided with the first back pressure valve (50), the oil inlet of described first back pressure valve (50) is connected with described energy recovery valve (40).
7. hydraulic control system according to claim 2, it is characterized in that, described hydraulic control system also comprises energy regenerating motor (60), the rotating shaft of described energy regenerating motor (60) is connected with the output shaft of the driving engine (70) of described hydraulic control system, and the oil inlet of described energy regenerating motor (60) can be connected to break-make with described accumulator package (30).
8. hydraulic control system according to claim 7, is characterized in that, described hydraulic control system also comprises:
Reducer unit (80), the oil outlet of described reducer unit (80) is communicated with the return opening of the oil inlet of described reducer unit (80) or described reducer unit (80); The oil outlet of described reducer unit (80) is connected with the control port of described energy regenerating motor (60), the oil inlet of described reducer unit (80) is connected with the pilot-actuated valve (110) of described hydraulic control system, and the return opening of described reducer unit (80) is connected with the hydraulic reservoir (120) of described hydraulic control system.
9. hydraulic control system according to claim 7, is characterized in that, described hydraulic control system also comprises:
Change-over valve (90), described change-over valve (90) is arranged on the hydraulic tubing between described accumulator package (30) and described energy regenerating motor (60), the oil inlet of described change-over valve (90) is connected with described accumulator package (30), and the oil outlet of described change-over valve (90) is connected with the oil inlet of described energy regenerating motor (60).
10. hydraulic control system according to claim 9, is characterized in that, described hydraulic control system also comprises:
Fill valve (130), the oil inlet of described Fill valve (130) is connected with the return opening of described main valve (10), and the oil outlet of described Fill valve (130) is connected on the hydraulic tubing between described change-over valve (90) and described energy regenerating motor (60).
11. hydraulic control systems according to claim 10, it is characterized in that, described hydraulic control system also comprises the second back pressure valve (140), the oil inlet of described second back pressure valve (140) is connected with the return opening of described main valve (10), the oil outlet of described second back pressure valve (140) is connected with the hydraulic reservoir (120) of described hydraulic control system, and the oil inlet of described Fill valve (130) is connected on the hydraulic tubing between described main valve (10) and described second back pressure valve (140).
12. hydraulic control systems according to claim 2, it is characterized in that, described hydraulic control system also comprises by pass valve (150), the oil inlet of described by pass valve (150) is connected with described accumulator package (30), and the oil outlet of described by pass valve (150) is connected with the hydraulic reservoir (120) of described hydraulic control system.
13. 1 kinds of hoisting cranes, comprise hydraulic control system, it is characterized in that, the hydraulic control system of the hoisting crane of described hydraulic control system according to any one of claim 1 to 12.
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| CN201510849016.4A CN105366579B (en) | 2015-11-27 | 2015-11-27 | Crane and hydraulic control system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107013508A (en) * | 2016-05-12 | 2017-08-04 | 华若延 | A kind of energy-recuperation system of the building machinery based on cantilever position |
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| CN105366579B (en) | 2018-07-03 |
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