CN105523478A - Control loop of hoisting machinery working device - Google Patents
Control loop of hoisting machinery working device Download PDFInfo
- Publication number
- CN105523478A CN105523478A CN201511010533.9A CN201511010533A CN105523478A CN 105523478 A CN105523478 A CN 105523478A CN 201511010533 A CN201511010533 A CN 201511010533A CN 105523478 A CN105523478 A CN 105523478A
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- Prior art keywords
- valve
- pressure
- control
- luffing
- mouth
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/20—Control systems or devices for non-electric drives
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- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- 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
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/625—Accumulators
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- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Automation & Control Theory (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a control loop of a hoisting machinery working device, which is used for front lifting of containers. The control loop comprises a hoisting mechanism, a working device driving loop, a control handle and a controller, wherein the hoisting mechanism comprises an underframe, a main arm, and a cantilever arm; an amplitude hydraulic cylinder is connected between the underframe and the main arm; a telescopic hydraulic cylinder is connected between the main arm and the cantilever arm. The control loop is characterized in that each of the amplitude hydraulic cylinder and the telescopic hydraulic cylinder is a hydraulic cylinder with three accommodating cavities of an extending-out cavity, a retracting cavity and a recovering cavity; an oil port of the recovering cavity of the telescopic hydraulic cylinder is connected with a telescopic recovering hydraulic system; an oil port of the recovering cavity of the amplitude hydraulic cylinder is connected with an amplitude recovering hydraulic system, the control handle is connected with the controller, and the controller is respectively connected with the working device driving loop, a telescopic recovering controller, and an amplitude recovering controller. According to the control loop disclosed by the invention, potential energy of a working device repeatedly rising and falling of a front lifting arm can be effectively recovered, and energy stored can be released in the lifting process, so that energy is saved.
Description
Technical field
The present invention relates to a kind of hydraulic efficiency pressure system for controlling lifting machine equipment, particularly a kind of arm being used in container front crane, reduces the control loop of its operating power consumption.
Background technology
Hang at container front side, needed frequently to pump by the arm of Driven by Hydraulic Cylinder, because arm own wt is larger, need to overcome gravity acting during its rising of Driven by Hydraulic Cylinder, when arm declines, gravitional force is converted to thermal energy consumption through hydraulic valve throttling and falls, and not only wastes energy, and also makes oil temperature raise simultaneously, increases system failure rate.If gravitional force when arm can be declined is recycled, considerable energy-saving effect will be had.
In order to utilize the gravitional force of lifting class equipment, Chinese invention patent (CN102561442A) discloses a kind of method, adopt a cylinder carry out energy regenerating and directly recycle, the hydraulic system structure of energy regenerating is simplified, but needs interpolation the 3rd independently cylinder.Disclosed in Chinese invention patent (CN102518606A), method is similar with it, the principle of three hydraulic actuating cylinder recuperated energies is achieved on board a dredger by method disclosed in Chinese invention patent (CN102660972A), but adopt the change of method to excavator swing arm physical construction of three oil cylinders larger, the mechanical characteristics of lifting mechanism can be affected, broken ring structure integraty, reduces intensity.In order to be used on front handling mobile crane by this principle, in Chinese invention patent (CN103527573A), disclose a kind of method, adopt the Ethylene recov cylinder pressure that two extra, take the device space and increase structural weight.In sum, all there is certain problem in existing solution.
Summary of the invention
For deficiency of the prior art, the present invention proposes the high and control loop of a kind of lifting machine equipment that can run under different operating mode of work efficiency, and it does not need to change the type that the existing physical construction of front handling mobile crane just can be applicable to various tonnage.
A kind of control loop of lifting machine equipment, comprise derricking gear, equipment drive circuit, control handle, controller, described derricking gear comprises underframe, principal arm, extension arm, it is characterized in that: luffing hydraulic actuating cylinder is connected between underframe and principal arm, telescopic hydraulic cylinder is connected between principal arm and extension arm; Luffing hydraulic actuating cylinder and telescopic hydraulic cylinder are all have the hydraulic actuating cylinder stretching out chamber, retraction chamber and recycling cavity three cavity volumes; The recycling cavity hydraulic fluid port of telescopic hydraulic cylinder connects flexible Ethylene recov pressing system; The recycling cavity hydraulic fluid port of luffing hydraulic actuating cylinder connects luffing Ethylene recov pressing system;
Described flexible Ethylene recov pressing system includes: apportioning valve, balance energy accumulator, counter balance pocket by pass valve, counter balance pocket pressure sensor, counter balance pocket Fill valve, counter balance pocket electromagnetic valve, fix-displacement pump, servomotor, pressure regulating cavity electromagnetic valve, pressure regulation energy storage, pressure regulating cavity by pass valve, pressure regulating cavity pressure sensor, pressure regulating cavity Fill valve, recovery controller, flexible recovery controller;
Described luffing Ethylene recov pressing system comprise apportioning valve, balance energy accumulator, counter balance pocket by pass valve, counter balance pocket pressure sensor, counter balance pocket Fill valve, counter balance pocket electromagnetic valve, fix-displacement pump, servomotor, pressure regulating cavity electromagnetic valve, pressure regulation energy storage, pressure regulating cavity by pass valve, pressure regulating cavity pressure sensor, pressure regulating cavity Fill valve, recovery controller, luffing recovery controller;
Control handle connection control device, controller connects equipment drive circuit, flexible recovery controller and luffing recovery controller respectively.
Flexible recovery controller connects apportioning valve, counter balance pocket electromagnetic valve, servomotor, pressure regulating cavity electromagnetic valve, counter balance pocket pressure sensor and pressure regulating cavity pressure sensor respectively.
Luffing recovery controller connects apportioning valve, counter balance pocket electromagnetic valve, servomotor, pressure regulating cavity electromagnetic valve, counter balance pocket pressure sensor and pressure regulating cavity pressure sensor respectively.
Described equipment drive circuit adopts open circuit or pump control closed hydraulic loop.
Described open circuit comprises any one structure following:
(1) Center-Open fix-displacement pump throttle type hydraulic circuit;
(2) Center-Close controllable capacity pump load-sensitive formula hydraulic circuit;
(3) independent control type hydraulic circuit is imported and exported;
(4) pump control closed hydraulic loop.
Compared with prior art tool of the present invention has the following advantages:
(1) effectively can reclaim front handling mobile crane swing arm repeat the potential energy of rise and fall equipment and rise in process the energy discharging storage thereon, save the energy.
(2) pressure in high pressure accumulator can be regulated in real time, thus regulate the balancing force of whole system, be adapted to various working.
(3) operating efficiency can be improved.This invention is applied to the equipment needing frequent rise and fall, when equipment rises, flow needed for hydraulic actuating cylinder reduces, and therefore can improve the ascending velocity of equipment, thus improves operating efficiency.
(4) original physical construction is not changed.During for machine adaptation, without the need to changing original physical construction, space requirement is less, is not only applicable to the equipment driven by double hydraulic cylinder, is also applicable to by the small-sized equipment of single Driven by Hydraulic Cylinder.
Accompanying drawing explanation
Fig. 1 is the integral structure figure of the container front crane of the control loop adopting a kind of lifting machine equipment
Fig. 2 is the three cavity volume hydraulic cylinder structures adopted in a kind of control loop of lifting machine equipment.
Fig. 3 is one of optional manner of equipment drive system in the control loop of a kind of lifting machine equipment of the present invention, is fix-displacement pump throttle type hydraulic efficiency pressure system.
Fig. 4 is one of optional manner of equipment drive system in the control loop of a kind of lifting machine equipment of the present invention, is the open circuit of controllable capacity pump load-sensitive formula hydraulic efficiency pressure system.
Fig. 5 is one of optional manner of equipment drive system in the control loop of a kind of lifting machine equipment of the present invention, for importing and exporting independent hydraulic control system.
Fig. 6 is one of optional manner of equipment drive system in the control loop of a kind of lifting machine equipment of the present invention, is pump control closed fhdraulic system.
In figure, 1-control handle, 2-controller, 3-equipment drive circuit, 4-telescopic hydraulic cylinder, 5-underframe, 6-luffing hydraulic actuating cylinder, 7-apportioning valve, 8-balance energy accumulator, 9-counter balance pocket by pass valve, 10-counter balance pocket pressure sensor, 11-counter balance pocket Fill valve, 12-counter balance pocket electromagnetic valve, 13-fix-displacement pump, 14-servomotor, 15-pressure regulating cavity electromagnetic valve, 16-pressure regulation energy storage, 17-pressure regulating cavity by pass valve, 18-pressure regulating cavity pressure sensor, 19-pressure regulating cavity feed pressure valve, 20-stretches recovery controller, 21-telescopic boom, 22-principal arm, 23-luffing recovery controller, 24-luffing Ethylene recov pressing system, 25-stretches Ethylene recov pressing system, 26-extension and contraction control valve, 27-luffing control cock, 28-by pass valve, 29-main pump, 30-fuel tank, 31-main frame, 32-pressure sensor, 33-pressure signal controller, 34-Fill valve, 35-proportion magnetic valve, 37, explosion relief valve group, 3701-first explosion relief valve group, 3702-second explosion relief valve group, the explosion-proof main valve plug of 38-, 39-electromagnetic priority valve, 40-hydraulic cylinder, 41-piston rod, 42-center link, 45-electromagnetic main valve, A-hydraulic actuating cylinder retraction chamber hydraulic fluid port, B-hydraulic actuating cylinder stretches out chamber hydraulic fluid port, C-hydraulic actuating cylinder recycling cavity hydraulic fluid port, a-hydraulic actuating cylinder retraction chamber, b-hydraulic actuating cylinder stretches out chamber, c-hydraulic actuating cylinder recycling cavity, A1-first actuator port, A2-second actuator port, B1-the 3rd actuator port, B2-the 4th actuator port, 3501-telescoping cylinder regeneration control valve, 3502-telescoping cylinder stretches out chamber inlet valve, 3503-telescoping cylinder stretches out chamber fuel-return valve, 3504-telescoping cylinder retraction chamber inlet valve, 3505-telescoping cylinder retraction chamber fuel-return valve, 3506-derricking cylinder regeneration control valve, 3507-derricking cylinder stretches out chamber inlet valve, 3508-derricking cylinder stretches out chamber fuel-return valve, 3509-derricking cylinder retraction chamber inlet valve, 3510-luffing oil retraction chamber fuel-return valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described further.
Shown in embodiment 1: Fig. 1, a kind of control loop of lifting machine equipment includes: derricking gear, equipment drive circuit 3, control handle 1, controller 2, and described derricking gear comprises underframe 5, principal arm 22, extension arm 21;
Shown in Fig. 2, luffing hydraulic actuating cylinder 6 has the hydraulic actuating cylinder stretching out chamber, retraction chamber, recycling cavity three cavity volumes, and telescopic hydraulic cylinder 4 has the hydraulic actuating cylinder stretching out chamber, retraction chamber, recycling cavity three cavity volumes.
The cylinder body of luffing hydraulic actuating cylinder 6 by pinned connection on vehicle frame 5, the piston rod of luffing hydraulic actuating cylinder 6 by pinned connection on principal arm 22.The cylinder body of telescopic hydraulic cylinder 4 by pinned connection on principal arm 22, the piston rod of telescopic hydraulic cylinder 4 by pinned connection on telescopic boom 21.
Luffing hydraulic actuating cylinder 6 is connected with luffing Ethylene recov pressing system 25, and telescopic hydraulic cylinder 4 is connected with flexible Ethylene recov pressing system 24.
Described flexible Ethylene recov pressing system 24 is identical with described luffing Ethylene recov pressing system 25 structure.
Flexible Ethylene recov pressing system 24 includes: apportioning valve 7, balance energy accumulator 8, counter balance pocket by pass valve 9, counter balance pocket pressure sensor 10, counter balance pocket Fill valve 11, counter balance pocket electromagnetic valve 12, fix-displacement pump 13, servomotor 14, pressure regulating cavity electromagnetic valve 15, pressure regulation energy storage 16, pressure regulating cavity by pass valve 17, pressure regulating cavity pressure sensor 18, pressure regulating cavity Fill valve 19 and flexible recovery controller 20;
In flexible recovery system 24: apportioning valve 7 one end is connected to the recycling cavity hydraulic fluid port C mouth of telescopic hydraulic cylinder 4, the other end is connected to balance energy accumulator 8 and exports, the other end of counter balance pocket electromagnetic valve 12 is connected with the left side mouth of fix-displacement pump 13, the right side mouth of fix-displacement pump 13 is connected with the left side mouth of pressure regulating cavity electromagnetic valve 15, driving mouth and the servomotor 14 of fix-displacement pump 13 link together, the right side mouth of pressure regulating cavity electromagnetic valve 15 and pressure regulation energy storage 16, pressure regulating cavity by pass valve 17 high-pressure mouth, pressure regulating cavity pressure sensor 18, pressure regulating cavity Fill valve 19 exports and is connected, the outlet of counter balance pocket by pass valve 9, the import of counter balance pocket Fill valve 11, the outlet of pressure regulating cavity by pass valve 17, the import of pressure regulating cavity Fill valve 19 is all connected with fuel tank.The signal of counter balance pocket pressure sensor 10 and the signal of pressure regulating cavity pressure sensor 18 are connected with the in1 mouth of luffing recovery controller 23 and in2 mouth respectively, and coming in and going out to hold with the control of apportioning valve 7 with pressure regulating cavity electromagnetic valve 15, servomotor 14, counter balance pocket electromagnetic valve 12 respectively by o1, o2, o3, o4 mouth of luffing recovery controller 23 through the control signal that calculates is connected.
Luffing Ethylene recov pressing system 25 includes: apportioning valve 7, balance energy accumulator 8, counter balance pocket by pass valve 9, counter balance pocket pressure sensor 10, counter balance pocket Fill valve 11, counter balance pocket electromagnetic valve 12, fix-displacement pump 13, servomotor 14, pressure regulating cavity electromagnetic valve 15, pressure regulation energy storage 16, pressure regulating cavity by pass valve 17, pressure regulating cavity pressure sensor 18, pressure regulating cavity Fill valve 19 and luffing recovery controller 23.
In luffing recovery system 25: apportioning valve 7 one end is connected to the recycling cavity hydraulic fluid port C mouth of luffing hydraulic actuating cylinder 6, the other end and counter balance pocket by pass valve 9 high-pressure mouth, counter balance pocket pressure sensor 10, counter balance pocket Fill valve 11 exports, balance energy accumulator 8 is connected with one end of counter balance pocket electromagnetic valve 12, the other end of counter balance pocket electromagnetic valve 12 is connected with the left side mouth of fix-displacement pump 13, the right side mouth of fix-displacement pump 13 is connected with the left side mouth of pressure regulating cavity electromagnetic valve 15, driving mouth and the servomotor 14 of fix-displacement pump 13 link together, the right side mouth of pressure regulating cavity electromagnetic valve 15 and pressure regulation energy storage 16, pressure regulating cavity by pass valve 17 high-pressure mouth, pressure regulating cavity pressure sensor 18, pressure regulating cavity Fill valve 19 exports and is connected, the outlet of counter balance pocket by pass valve 9, the import of counter balance pocket Fill valve 11, the outlet of pressure regulating cavity by pass valve 17, the import of pressure regulating cavity Fill valve 19 is all connected with fuel tank.The signal of counter balance pocket pressure sensor 10 and the signal of pressure regulating cavity pressure sensor 18 are connected with the in1 mouth of luffing recovery controller 23 and in2 mouth respectively, and coming in and going out to hold with the control of apportioning valve 7 with pressure regulating cavity electromagnetic valve 15, servomotor 14, counter balance pocket electromagnetic valve 12 respectively by o1, o2, o3, o4 mouth of luffing recovery controller 23 through the control signal that calculates is connected.
What the first actuator port A1 of equipment drive circuit 3 was connected to telescopic hydraulic cylinder 4 stretches out on the hydraulic fluid port B mouth of chamber, 3rd actuator port B1 of equipment drive circuit 3 is connected on the retraction chamber hydraulic fluid port A mouth of telescopic hydraulic cylinder 4, what the second actuator port A2 of equipment drive circuit 3 was connected to luffing hydraulic actuating cylinder 6 stretches out on the hydraulic fluid port B mouth of chamber, and the 4th actuator port B2 of equipment drive circuit 3 is connected on the retraction chamber hydraulic fluid port A mouth of luffing hydraulic actuating cylinder 6.
The output port of control handle 1 is connected on the control inputs port Con mouth of controller 2, the pump signal output port Sp mouth of controller 2 is connected on the in1 mouth of equipment drive circuit 3, the valve signal output port Sv mouth of controller 2 is connected on the in2 mouth of equipment drive circuit 3, the luffing of controller 2 reclaims output port Cb mouth and is connected on the input port in3 mouth of luffing recovery controller 23, the flexible recovery output port Ca mouth of controller 2 is connected on the input port in3 mouth of flexible recovery controller 23, the pressure signal input end mouth Pp mouth of controller 2 is connected on the delivery port o1 mouth of equipment drive circuit 3.
Equipment drive circuit 3 described by the present embodiment adopts open circuit, i.e. Center-Open fix-displacement pump throttle type hydraulic circuit.
As shown in Figure 3, Center-Open fix-displacement pump throttle type hydraulic circuit, includes extension and contraction control valve 26, luffing control cock 27, by pass valve 28, main pump 29, fuel tank 30, main frame 31, the first explosion relief valve group 3701, first explosion relief valve group 3702.First explosion relief valve group 3701 and the second explosion relief valve group 3702 all include explosion-proof main valve plug 38, electromagnetic priority valve 39, electromagnetic main valve 45.
The output shaft of main frame 31 is connected with main pump 29 main shaft, the oil suction of main pump 29 is connected with fuel tank 30, the oil outlet of main pump 29 is connected with the oil inlet of luffing control cock 27 with the high-pressure mouth of by pass valve 28, the oil outlet of main pump 29 is connected with the import of extension and contraction control valve 26 by the meta path of luffing control cock 27, and the low pressure port of the return opening of luffing control cock 27, the return opening of extension and contraction control valve 26, meta return opening, by pass valve 28 is connected with fuel tank.
The oil outlet of luffing control cock 27 connects the second explosion relief valve group 3702 respectively and is communicated with the second actuator port A2, the 4th actuator port B2, the oil outlet of extension and contraction control valve connects the first explosion relief valve group 3701 respectively and is communicated with the first actuator port A1, the 3rd actuator port B1, and valve control inputs signal is connected with the control end of luffing control cock and the second explosion relief valve group 3702, extension and contraction control valve and the first explosion relief valve group 3701 by in2 mouth.Incoming signal in1 does not use.
Described flexible recovery controller 23 adopts model to be BOSCH-REXROTH BODAS, RC12-18/20.
Described luffing recovery controller 23 adopts model to be BOSCH-REXROTH BODAS, RC12-18/20.
The controller 2 of the present embodiment adopts model to be BOSCH-REXROTH BODAS, RC6-9/20.
The principle of work of the present embodiment: under initial condition, when equipment is in lift location, luffing hydraulic actuating cylinder stretches out entirely, and each electromagnetic valve and apportioning valve are all in closed condition.
When control handle 1 produces principal arm dropping signal, controller 2 Received signal strength by resolving, control signal is outputted to the in2 mouth of equipment drive circuit by Sv port, and enter the signal input part of luffing control cock 27, luffing control cock 27 moves to right position, and the 4th actuator port B2 is fuel-displaced, the second actuator port A2 oil return.Control signal being outputted to the in3 mouth of luffing recovery controller 23 simultaneously by Ca port, opening apportioning valve 7 by resolving driving.Due to the deadweight of equipment, luffing hydraulic actuating cylinder 6 starts to fall, the fluid promoting to stretch out chamber gets back to the second actuator port A2 mouth by stretching out chamber hydraulic fluid port B mouth, and the fluid promoting recycling cavity enters luffing Ethylene recov pressing system by luffing hydraulic actuating cylinder recycling cavity hydraulic fluid port C mouth simultaneously, passing ratio valve 7 enters balance energy accumulator 8, and therefore the part energy in dropping process is stored in balance energy accumulator 8.
When control handle 2 produces principal arm lifting signal, controller 2 Received signal strength by resolving, control signal is outputted to the in2 mouth of equipment drive circuit by Sv port, and enter the signal input part of luffing control cock 27, luffing control cock moves to left position, and the 4th actuator port B2 is fuel-displaced, the second actuator port A2 oil return.Control signal being outputted to the in3 mouth of luffing recovery system controller 20 simultaneously by Ca port, opening apportioning valve 7 by resolving driving.Main pump 29 exports fluid with minimum injection rate, the pressure sensor 32 of the 4th actuator port B2 mouth is made to produce pressure signal, this pressure signal outputs to controller 2 by pressure signal controller 33 from o1 mouth, discharge of main pump signal is converted to and the in1 mouth being outputted to equipment drive circuit by Sp port by resolving of controller 2, and enter the signal input part of main pump, main pump pivot angle increases, and discharge capacity increases, and makes fluid enter retraction chamber by the retraction chamber hydraulic fluid port A mouth of luffing hydraulic actuating cylinder 6.Meanwhile, the opening of the fluid passing ratio valve 7 of balance energy accumulator 8 enters the recycling cavity of luffing hydraulic actuating cylinder, and recycling cavity and retraction cavity pressure drive luffing hydraulic actuating cylinder to stretch out simultaneously, make principal arm lifting.
In the process of the continuous lifting of principal arm and decline, the pressure of balance energy accumulator 8 is monitored by counter balance pocket pressure sensor 10, when pressure is excessive, the signal of counter balance pocket pressure sensor enters luffing recovery controller 23 by in2 mouth, open counter balance pocket electromagnetic valve 12 and pressure regulating cavity electromagnetic valve 15, and drive servomotor 14 to drive fix-displacement pump 13 to be transferred in pressure regulation energy storage 16 by the high pressure oil of balance energy accumulator 8.When pressure is too small, signal enters luffing recovery controller 23 by in2 mouth, opens counter balance pocket electromagnetic valve 12 and pressure regulating cavity electromagnetic valve 15, and drives servomotor 14 to drive fix-displacement pump 13 to be transferred in balance energy accumulator 8 by the hydraulic oil of pressure regulation energy storage 16.Maintain the pressure of balance energy accumulator 8 in this way in reasonable higher efficiency range.Balance energy accumulator 8 and pressure regulation energy storage 16 are all provided with by pass valve and Fill valve, for the system protection of pressure peak and repairing when inhaling empty.
Pressure regulating cavity pressure sensor monitoring pressure regulation energy storage pressure, pressure regulation energy storage pressure too high and cannot to balance end shift alarm prompting pressure release, low pressure is pointed out when pressure regulation energy storage pressure is too low and balance end cannot shift fluid to pressure regulating cavity, and by inflating ftercompction to pressure regulation energy storage.
When control handle 1 produces principal arm retraction signal, controller 2 Received signal strength by resolving, control signal is outputted to the in2 mouth of equipment drive circuit by Sv port, and enter the signal input part of extension and contraction control valve 26, extension and contraction control valve 26 moves to right position, and the 3rd actuator port B1 is fuel-displaced, the first actuator port A2 oil return.Control signal being outputted to the in3 mouth of flexible recovery system controller 20 simultaneously by Ca port, opening apportioning valve 7 by resolving driving.Due to the deadweight of equipment, telescopic hydraulic cylinder 4 starts to shorten, the fluid promoting to stretch out chamber gets back to the first actuator port A1 mouth by stretching out chamber hydraulic fluid port B mouth, and the fluid promoting recycling cavity enters flexible Ethylene recov pressing system by telescopic hydraulic cylinder recycling cavity hydraulic fluid port C mouth simultaneously, passing ratio valve 7 enters balance energy accumulator 8, and therefore the part energy in retraction process is stored in balance energy accumulator 8.
When control handle 2 produce principal arm stretch out signal time, controller 2 Received signal strength by resolving, control signal is outputted to the in2 mouth of equipment drive circuit by Sv port, and enter the signal input part of extension and contraction control valve 26, extension and contraction control valve moves to left position, and the 3rd actuator port B1 is fuel-displaced, the first actuator port A1 oil return.Control signal being outputted to the in3 mouth of flexible recovery controller 20 simultaneously by Ca port, opening apportioning valve 7 by resolving driving.Main pump 29 exports fluid with minimum injection rate, the pressure sensor 32 of the 3rd actuator port B1 mouth is made to produce pressure signal, this pressure signal outputs to controller 2 by pressure signal controller 33 from o1 mouth, discharge of main pump signal is converted to and the in1 mouth being outputted to equipment drive circuit by Sp port by resolving of controller 2, and enter the signal input part of main pump, main pump pivot angle increases, and discharge capacity increases, and makes fluid enter retraction chamber by the retraction chamber hydraulic fluid port A mouth of telescopic hydraulic cylinder 4.Meanwhile, the opening of the fluid passing ratio valve 7 of balance energy accumulator 8 enters the recycling cavity of telescopic hydraulic cylinder, and recycling cavity and retraction cavity pressure drive telescopic hydraulic cylinder to stretch out simultaneously, and arm is extended.
Constantly to extend and in the process that shortens at arm, the pressure of balance energy accumulator 8 is monitored by counter balance pocket pressure sensor 10, when pressure is excessive, the signal of counter balance pocket pressure sensor enters flexible recovery controller 20 by in2 mouth, open counter balance pocket electromagnetic valve 12 and pressure regulating cavity electromagnetic valve 15, and drive servomotor 14 to drive fix-displacement pump 13 to be transferred in pressure regulation energy storage 16 by the high pressure oil of balance energy accumulator 8.When pressure is too small, signal enters flexible recovery controller 20 by in2 mouth, opens counter balance pocket electromagnetic valve 12 and pressure regulating cavity electromagnetic valve 15, and drives servomotor 14 to drive fix-displacement pump 13 to be transferred in balance energy accumulator 8 by the hydraulic oil of pressure regulation energy storage 16.Maintain the pressure of balance energy accumulator 8 in this way in reasonable higher efficiency range.Balance energy accumulator 8 and pressure regulation energy storage 16 are all provided with by pass valve and Fill valve, for the system protection of pressure peak and repairing when inhaling empty.
Pressure regulating cavity pressure sensor monitoring pressure regulation energy storage pressure, in pressure regulating cavity hypertonia and cannot to balance end shift alarm prompting pressure release, in pressure regulating cavity hypotony and balance end cannot shift fluid to pressure regulating cavity time prompting low pressure, and by inflating ftercompction to flexible recovery system 24.
Embodiment 2: the equipment drive circuit 3 of the present embodiment adopts open circuit, i.e. Center-Close controllable capacity pump load-sensitive formula hydraulic circuit.
As shown in Figure 4, Center-Close controllable capacity pump load-sensitive formula hydraulic circuit comprises extension and contraction control valve 26, luffing control cock 27, by pass valve 28, main pump 29, fuel tank 30, main frame 31, pressure sensor 32, pressure signal controller 33, first explosion relief valve group 3701 and the second explosion relief valve group 3702.
First explosion relief valve group 3701 and the second explosion relief valve group 3702 all include explosion-proof main valve plug 38, electromagnetic priority valve 39, electromagnetic main valve 45.
The output shaft of main frame 31 is connected with main pump 29 main shaft, the oil suction of main pump 29 is connected with fuel tank 30, the oil outlet of main pump 29 is connected with the oil inlet of luffing control cock 27 with the high-pressure mouth of by pass valve 28, the oil outlet of main pump 29 is connected with the import of extension and contraction control valve 26 by the meta path of luffing control cock 27, and the low pressure port of the return opening of luffing control cock 27, the return opening of extension and contraction control valve 26, meta return opening, by pass valve 28 is connected with fuel tank.The oil outlet of luffing control cock connects the second explosion relief valve group 3702 respectively and is communicated with the second actuator port A2, the 4th actuator port B2, the oil outlet of extension and contraction control valve connects the first explosion relief valve group 3701 respectively and is communicated with the first actuator port A1, the 3rd actuator port B1, and valve control inputs signal is connected with the control end of luffing control cock and the second explosion relief valve group 3702, extension and contraction control valve and the first explosion relief valve group 3701 by in2 mouth.Pump control inputs signal in1 is connected with the control end of main pump 29.Pressure sensor 32 is connected on first, second, third, fourth actuator port A1, A2, B1, B2 tetra-actuator ports, and its signal enters pressure signal controller 33, and is exported by delivery port o1.
Other structure is identical with embodiment 1.
Embodiment 3: the equipment drive circuit 3 of the present embodiment adopts open circuit, namely imports and exports independent control type hydraulic circuit.
As shown in Figure 5, described import and export independent control type hydraulic efficiency pressure system, include by pass valve 28, main pump 29, fuel tank 30, main frame 31, pressure sensor 32, pressure signal controller 33, telescoping cylinder regeneration control valve 3501, telescoping cylinder stretches out chamber inlet valve 3502, telescoping cylinder stretches out chamber fuel-return valve 3503, telescoping cylinder retraction chamber inlet valve 3504, telescoping cylinder retraction chamber fuel-return valve 3505, derricking cylinder regeneration control valve 3506, derricking cylinder stretches out chamber inlet valve 3507, derricking cylinder stretches out chamber fuel-return valve 3508, derricking cylinder retraction chamber inlet valve 3509, derricking cylinder retraction chamber fuel-return valve 3510, first pipeline explosion relief valve group 3701 and the second explosion relief valve group 3702.
First pipeline explosion relief valve group 3701 and the second explosion relief valve group 3702 all include explosion-proof main valve plug 38, electromagnetic priority valve 39, electromagnetic main valve 45.
The output shaft of main frame 31 is connected with main pump 29 main shaft, the oil suction of main pump 29 is connected with fuel tank 30, the oil outlet of main pump 29 and the high-pressure mouth of by pass valve 28, two luffings control the P mouth of inlet valve (namely derricking cylinder stretches out accent inlet valve 3507 and derricking cylinder retraction chamber inlet valve 3509), the P mouth of two extension and contraction control inlet valves (namely telescoping cylinder stretches out chamber inlet valve 3502 and telescoping cylinder retraction chamber inlet valve 3504) is connected, two luffings control the T mouth of fuel-return valve (namely derricking cylinder stretches out chamber fuel-return valve 3508 and derricking cylinder retraction chamber fuel-return valve 3510), the T mouth of two extension and contraction control inlet valves (namely derricking cylinder stretches out chamber fuel-return valve 3508 and derricking cylinder retraction chamber fuel-return valve 3510) is connected with fuel tank.
In the extension and contraction control valve group in left side: the outlet that telescoping cylinder stretches out the outlet of chamber inlet valve 3502, telescoping cylinder stretches out chamber fuel-return valve 3503 is connected with the second actuator port B1, the outlet of telescoping cylinder retraction chamber inlet valve 3504, the outlet of telescoping cylinder retraction chamber fuel-return valve 3505 are connected with the first actuator port A1, and two hydraulic fluid ports of telescoping cylinder regeneration control valve 3501 are connected with the second actuator port B1 mouth with the first actuator port A1 mouth respectively.
In the luffing control cock group on right side: luffing control cock group is identical with the layout of extension and contraction control valve group.The oil outlet of luffing control cock connects the second explosion relief valve group 3702 respectively and is communicated with the 3rd actuator port A2, the 5th actuator port B2, the oil outlet of extension and contraction control valve connects the first explosion relief valve group 3701 respectively and is communicated with the first actuator port A1, the second actuator port B1, and valve control inputs signal is connected with the control end of luffing control cock group and the second explosion relief valve group 3702, extension and contraction control valve group and the first explosion relief valve group 3701 by in2 mouth.
Four pressure sensors 32 are connected to four actuator ports, and (one of them pressure sensor is connected between telescoping cylinder regeneration control valve 3501 and explosion-proof main valve plug 38, second pressure sensor is connected between telescoping cylinder regeneration control valve 3501 and electromagnetic main valve 45, 3rd pressure sensor is connected between derricking cylinder regeneration control valve 3506 and explosion-proof main valve plug 38, 4th pressure sensor is connected between derricking cylinder regeneration control valve 3506 and electromagnetic main valve 45), the fuel injection pressure signal that four pressure sensors 32 collect enters in pressure signal controller 33 respectively, and exported by output port o1, incoming signal in1 and in2 is integrated by pressure signal controller 33, and respectively valve and pump are controlled, realize luffing hydraulic actuating cylinder 6 and telescopic hydraulic cylinder 4 works.
The model of pressure signal controller 33 is BOSCH-REXROTH BODAS, RCE12-4/22I/O expansion modules.Other structure is identical with embodiment 1.
Embodiment 4: the equipment drive circuit of the present embodiment adopts pump control closed type hydraulic system circuit.
As shown in Figure 6, described pump control closed type hydraulic system circuit is made up of telescopic control system and luffing control system, telescopic control system and luffing control system independent operating.
Described telescopic control system includes by pass valve 28, main pump 29, fuel tank 30, main frame 31, pressure sensor 32, pressure signal controller 33, Fill valve 34, explosion relief valve group 37.Described explosion relief valve group 37 includes explosion-proof main valve plug 38, electromagnetic priority valve 39, electromagnetic main valve 45.
The output shaft of main frame 31 is connected with main pump 29 main shaft, two mouths of main pump 29 stretch out chamber hydraulic fluid port B with telescopic hydraulic cylinder retraction chamber hydraulic fluid port A, telescopic hydraulic cylinder respectively, telescopic hydraulic cylinder retraction chamber hydraulic fluid port A, telescopic hydraulic cylinder stretch out the by pass valve 28 of chamber hydraulic fluid port B, and the Fill valve 34 that telescopic hydraulic cylinder retraction chamber hydraulic fluid port A, telescopic hydraulic cylinder stretch out chamber hydraulic fluid port B connects.
The oil outlet of extension and contraction control valve connects explosion relief valve group 37 and is communicated with the first actuator port A1, the 3rd actuator port B1, and the valve control inputs signal of controller 2 is connected with the control end of extension and contraction control valve 26 and explosion relief valve group 37 by in2 mouth.
Pressure sensor 32 is connected on the actuator port between by pass valve 28 and explosion relief valve group 37, the fuel injection pressure signal that pressure sensor 32 collects is entered pressure signal controller 33 and is exported by o1 mouth, the pump control signal of controller 2 enters control telescopic system from in1 mouth, and control main capacity of pump, realize the control to telescopic hydraulic cylinder.
Described luffing control system includes by pass valve 28, main pump 29, fuel tank 30, main frame 31, pressure sensor 32, pressure signal controller 33, Fill valve 34, explosion relief valve group 37.Described explosion relief valve group 37 includes explosion-proof main valve plug 38, electromagnetic priority valve 39, electromagnetic main valve 45.
The output shaft of main frame 31 is connected with main pump 29 main shaft, two mouths of main pump 29 stretch out chamber hydraulic fluid port B with luffing hydraulic actuating cylinder retraction chamber hydraulic fluid port A, luffing hydraulic actuating cylinder respectively, luffing hydraulic actuating cylinder retraction chamber hydraulic fluid port A, luffing hydraulic actuating cylinder stretch out the by pass valve 28 of chamber hydraulic fluid port B, and the Fill valve 34 that luffing hydraulic actuating cylinder retraction chamber hydraulic fluid port A, luffing hydraulic actuating cylinder stretch out chamber hydraulic fluid port B connects.
The oil outlet of luffing control cock 27 connects explosion relief valve group 37 and is communicated with the second actuator port A2, the 4th actuator port B2; The valve control inputs signal of controller 2 is connected with the control end of luffing control cock and explosion relief valve group 37 by in2 mouth.
Pressure sensor 32 is connected on the actuator port between by pass valve 28 and explosion relief valve group 37, the fuel injection pressure signal that pressure sensor collects is entered pressure signal controller 33 and is exported by o1 mouth, the pump control signal of controller 2 enters luffing control system from in1 mouth and controls main capacity of pump, realizes the control to luffing hydraulic actuating cylinder.
The model of pressure signal controller 33 is BOSCH-REXROTH BODAS, RCE12-4/22I/O expansion modules.Other structure is identical with embodiment 1.
Illustrate: in equipment drive circuit described in the invention, main frame 31 can also be spark ignition engine except electrical motor, other dynamical elements such as diesel engine.The quantity of main frame, main pump is one or more.
Therefore the better feasible embodiment of above-mentioned only the present invention, non-ly limit to scope, does various distortion or apply mechanically all within this technical scheme protection domain according to above-described embodiment.
Claims (10)
1. the control loop of a lifting machine equipment, for face-up transporting hoist of container, it comprises derricking gear, equipment drive circuit, control handle, controller, described derricking gear comprises underframe, principal arm, extension arm, luffing hydraulic actuating cylinder is connected between underframe and principal arm, and telescopic hydraulic cylinder is connected between principal arm and extension arm; It is characterized in that: luffing hydraulic actuating cylinder and telescopic hydraulic cylinder are all have the hydraulic actuating cylinder stretching out chamber, retraction chamber and recycling cavity three cavity volumes; The recycling cavity hydraulic fluid port of telescopic hydraulic cylinder connects flexible Ethylene recov pressing system; The recycling cavity hydraulic fluid port of luffing hydraulic actuating cylinder connects luffing Ethylene recov pressing system, control handle connection control device, and controller connects equipment drive circuit, flexible recovery controller and luffing recovery controller respectively;
Described flexible Ethylene recov pressing system includes: apportioning valve, balance energy accumulator, counter balance pocket by pass valve, counter balance pocket pressure sensor, counter balance pocket Fill valve, counter balance pocket electromagnetic valve, fix-displacement pump, servomotor, pressure regulating cavity electromagnetic valve, pressure regulation energy storage, pressure regulating cavity by pass valve, pressure regulating cavity pressure sensor, pressure regulating cavity Fill valve, recovery controller, flexible recovery controller; Flexible recovery controller connects apportioning valve, counter balance pocket electromagnetic valve, servomotor, pressure regulating cavity electromagnetic valve, counter balance pocket pressure sensor and pressure regulating cavity pressure sensor respectively; Described luffing Ethylene recov pressing system comprises apportioning valve, balance energy accumulator, counter balance pocket by pass valve, counter balance pocket pressure sensor, counter balance pocket Fill valve, counter balance pocket electromagnetic valve, fix-displacement pump, servomotor, pressure regulating cavity electromagnetic valve, pressure regulation energy storage, pressure regulating cavity by pass valve, pressure regulating cavity pressure sensor, pressure regulating cavity Fill valve, recovery controller, luffing recovery controller; Luffing recovery controller connects apportioning valve, counter balance pocket electromagnetic valve, servomotor, pressure regulating cavity electromagnetic valve, counter balance pocket pressure sensor and pressure regulating cavity pressure sensor respectively.
2. the control loop of a kind of lifting machine equipment according to claim 1, it is characterized in that described apportioning valve (7) one end is connected to the hydraulic actuating cylinder recycling cavity hydraulic fluid port of telescopic hydraulic cylinder (4), the other end connects balance energy accumulator (8) outlet and is connected with the high-pressure mouth of counter balance pocket by pass valve (9), the high-pressure mouth of counter balance pocket by pass valve (9) connects balance energy accumulator (8) and counter balance pocket Fill valve (11) outlet, counter balance pocket Fill valve (11) outlet connects counter balance pocket pressure sensor (10), counter balance pocket Fill valve (11) outlet connects one end of counter balance pocket electromagnetic valve (12), the other end of counter balance pocket electromagnetic valve (12) is connected with the left side mouth of fix-displacement pump (13), the right side mouth of fix-displacement pump (13) is connected with the left side mouth of pressure regulating cavity electromagnetic valve (15), driving mouth and the servomotor (14) of fix-displacement pump (13) link together, the right side mouth of pressure regulating cavity electromagnetic valve (15) is connected with pressure regulation energy storage (16) and is connected with pressure regulating cavity by pass valve (17) high-pressure mouth, pressure regulation energy storage (16) connects pressure regulating cavity by pass valve (17) high-pressure mouth, pressure regulating cavity by pass valve (17) high-pressure mouth connects pressure regulating cavity pressure sensor (18) and exports with pressure regulating cavity Fill valve (19) and is connected, pressure regulating cavity pressure sensor (18) exports with pressure regulating cavity Fill valve (19) and is connected, the outlet of counter balance pocket by pass valve (9), the import of counter balance pocket Fill valve (11), the outlet of pressure regulating cavity by pass valve (17), the import of pressure regulating cavity Fill valve (19) are all connected with fuel tank, the signal of counter balance pocket pressure sensor (10) and the signal of pressure regulating cavity pressure sensor (18) are connected with the in1 mouth of flexible recovery controller (23) and in2 mouth respectively, and coming in and going out to hold with the control of apportioning valve (7) with pressure regulating cavity electromagnetic valve (15), servomotor (14), counter balance pocket electromagnetic valve (12) respectively by o1, o2, o3, o4 mouth of flexible recovery controller (20) through the control signal that calculates is connected.
3. the control loop of a kind of lifting machine equipment according to claim 1, it is characterized in that described apportioning valve (7) one end is connected to the hydraulic actuating cylinder recycling cavity hydraulic fluid port of luffing hydraulic actuating cylinder (6), the other end is connected with the high-pressure mouth of counter balance pocket by pass valve (9) and is connected with balance energy accumulator (8), the high-pressure mouth of counter balance pocket by pass valve (9) connects balance energy accumulator (8) and counter balance pocket Fill valve (11) outlet, counter balance pocket Fill valve (11) outlet connects counter balance pocket pressure sensor (10), counter balance pocket Fill valve (11) outlet connects one end of counter balance pocket electromagnetic valve (12), the other end of counter balance pocket electromagnetic valve (12) is connected with the left side mouth of fix-displacement pump (13), the right side mouth of fix-displacement pump (13) is connected with the left side mouth of pressure regulating cavity electromagnetic valve (15), driving mouth and the servomotor (14) of fix-displacement pump (13) link together, the right side mouth of pressure regulating cavity electromagnetic valve (15) is connected with pressure regulation energy storage (16) and is connected with pressure regulating cavity by pass valve (17) high-pressure mouth, pressure regulation energy storage (16) connects pressure regulating cavity by pass valve (17) high-pressure mouth, pressure regulating cavity by pass valve (17) high-pressure mouth connects pressure regulating cavity pressure sensor (18) and exports with pressure regulating cavity Fill valve (19) and is connected, pressure regulating cavity pressure sensor (18) exports with pressure regulating cavity Fill valve (19) and is connected, the outlet of counter balance pocket by pass valve (9), the import of counter balance pocket Fill valve (11), the outlet of pressure regulating cavity by pass valve (17), the import of pressure regulating cavity Fill valve (19) are all connected with fuel tank, the signal of counter balance pocket pressure sensor (10) and the signal of pressure regulating cavity pressure sensor (18) are connected with the in1 mouth of luffing recovery controller (23) and in2 mouth respectively, and coming in and going out to hold with the control of apportioning valve (7) with pressure regulating cavity electromagnetic valve (15), servomotor (14), counter balance pocket electromagnetic valve (12) respectively by o1, o2, o3, o4 mouth of luffing recovery controller (20) through the control signal that calculates is connected.
4. the control loop of a kind of lifting machine lifting appliance according to claim 1, it is characterized in that described equipment drive circuit adopts Center-Open fix-displacement pump throttle type hydraulic circuit, it includes extension and contraction control valve, luffing control cock, by pass valve, main pump, fuel tank, main frame, the first explosion relief valve group, the second explosion relief valve group; First explosion relief valve group and the second explosion relief valve group all include explosion-proof main valve plug, electromagnetic priority valve, electromagnetic main valve; The output shaft of main frame is connected with main pump main shaft, the oil suction of main pump is connected with fuel tank, the oil outlet of main pump is connected with the oil inlet of the high-pressure mouth of by pass valve with luffing control cock, the oil outlet of main pump is connected with the import of extension and contraction control valve by the meta path of luffing control cock, and the low pressure port of the return opening of luffing control cock, the return opening of extension and contraction control valve, meta return opening, by pass valve is connected with fuel tank; The oil outlet of luffing control cock connects the second explosion relief valve group respectively and is communicated with the second actuator port A2, the 4th actuator port B2, the oil outlet of extension and contraction control valve connects the first explosion relief valve group respectively and is communicated with the first actuator port A1, the 3rd actuator port B1, and the valve control inputs signal of controller is connected with the control end of luffing control cock and the second explosion relief valve group, extension and contraction control valve and the first explosion relief valve group by in2 mouth.
5. the control loop of a kind of lifting machine lifting appliance according to claim 4, it is characterized in that described equipment drive circuit adopts Center-Close controllable capacity pump load-sensitive formula hydraulic circuit, it comprises extension and contraction control valve, luffing control cock, by pass valve, main pump, fuel tank, main frame, pressure sensor, pressure signal controller, the first explosion relief valve group and the second explosion relief valve group; First explosion relief valve group and the second explosion relief valve group all include explosion-proof main valve plug, electromagnetic priority valve, electromagnetic main valve;
The output shaft of main frame is connected with main pump main shaft, the oil suction of main pump is connected with fuel tank, the oil outlet of main pump is connected with the oil inlet of the high-pressure mouth of by pass valve with luffing control cock, the oil outlet of main pump is connected with the import of extension and contraction control valve by the meta path of luffing control cock, and the low pressure port of the return opening of luffing control cock, the return opening of extension and contraction control valve, meta return opening, by pass valve is connected with fuel tank; The oil outlet of luffing control cock connects the second explosion relief valve group respectively and is communicated with the second actuator port A2, the 4th actuator port B2, the oil outlet of extension and contraction control valve connects the first explosion relief valve group respectively and is communicated with the first actuator port A1, the 3rd actuator port B1, and the valve control inputs signal of controller is connected with the control end of luffing control cock and the second explosion relief valve group, extension and contraction control valve and the first explosion relief valve group by in2 mouth; The pump control inputs signal in1 of controller is connected with the control end of main pump; Pressure sensor is connected on four actuator ports, and the signal of pressure sensor collection enters pressure signal controller, and is exported by delivery port o1.
6. the control loop of a kind of lifting machine lifting appliance according to claim 4, it is characterized in that described equipment drive circuit adopts and import and export independent control type hydraulic efficiency pressure system, it includes by pass valve, main pump, fuel tank, main frame, pressure sensor, pressure signal controller, telescoping cylinder regeneration control valve, telescoping cylinder stretches out chamber inlet valve, telescoping cylinder stretches out chamber fuel-return valve, telescoping cylinder retraction chamber inlet valve, telescoping cylinder retraction chamber fuel-return valve, derricking cylinder regeneration control valve, derricking cylinder stretches out chamber inlet valve, derricking cylinder stretches out chamber fuel-return valve, derricking cylinder retraction chamber inlet valve, derricking cylinder retraction chamber fuel-return valve, first pipeline explosion relief valve group and the second explosion relief valve group, first pipeline explosion relief valve group and the second explosion relief valve group all include explosion-proof main valve plug, electromagnetic priority valve, electromagnetic main valve,
The output shaft of main frame is connected with main pump main shaft, the oil suction of main pump is connected with fuel tank, the oil outlet of main pump and the high-pressure mouth of by pass valve, two luffings control the P mouth of inlet valve, the P mouth of two extension and contraction control inlet valves is connected, and two luffings control the T mouth of fuel-return valve, the T mouths of two extension and contraction control inlet valves are all connected with fuel tank;
The outlet that telescoping cylinder stretches out the outlet of chamber inlet valve, telescoping cylinder stretches out chamber fuel-return valve is connected with the second actuator port B1, the outlet of telescoping cylinder retraction chamber inlet valve, the outlet of telescoping cylinder retraction chamber fuel-return valve are connected with the first actuator port A1, and two hydraulic fluid ports of telescoping cylinder regeneration control valve are connected with the second actuator port B1 mouth with the first actuator port A1 mouth respectively;
The oil outlet of luffing control cock connects the second explosion relief valve group respectively and is communicated with the 3rd actuator port A2, the 5th actuator port B2, the oil outlet of extension and contraction control valve connects the first explosion relief valve group respectively and is communicated with the first actuator port A1, the second actuator port B1, and the valve control inputs signal of controller is connected with the control end of luffing control cock group and the second explosion relief valve group, extension and contraction control valve group and the first explosion relief valve group by in2 mouth; Four pressure sensors are connected to four actuator ports, the fuel injection pressure signal that four pressure sensors collect enters in pressure signal controller respectively, and exported by output port o1, incoming signal in1 and in2 is integrated by pressure signal controller, and respectively each valve and main pump are controlled, realize luffing hydraulic actuating cylinder and telescopic hydraulic cylinder working.
7. the control loop of a kind of lifting machine lifting appliance according to claim 4, it is characterized in that described equipment drive circuit is made up of telescopic control system and luffing control system pump control closed type hydraulic system circuit, telescopic control system and luffing control system independent operating;
Described telescopic control system includes by pass valve, main pump, fuel tank, main frame, pressure sensor, pressure signal controller, Fill valve, explosion relief valve group, and described explosion relief valve group includes explosion-proof main valve plug, electromagnetic priority valve, electromagnetic main valve;
The output shaft of main frame is connected with main pump main shaft, two mouths of main pump stretch out chamber hydraulic fluid port B with telescopic hydraulic cylinder retraction chamber hydraulic fluid port A, telescopic hydraulic cylinder respectively, telescopic hydraulic cylinder retraction chamber hydraulic fluid port A, telescopic hydraulic cylinder stretch out the by pass valve 28 of chamber hydraulic fluid port B, and the Fill valve 34 that telescopic hydraulic cylinder retraction chamber hydraulic fluid port A, telescopic hydraulic cylinder stretch out chamber hydraulic fluid port B connects;
The oil outlet of extension and contraction control valve connects explosion relief valve group and is communicated with the first actuator port A1, the 3rd actuator port B1, and the valve control inputs signal of controller is connected with the control end of extension and contraction control valve and explosion relief valve group by in2 mouth;
Pressure sensor is connected on the actuator port between by pass valve and explosion relief valve group, the fuel injection pressure signal that pressure sensor collects is entered pressure signal controller and is exported by o1 mouth, the pump control signal of controller enters control telescopic system from in1 mouth, and control main capacity of pump, realize the control to telescopic hydraulic cylinder;
Described luffing control system includes by pass valve, main pump, fuel tank, main frame, pressure sensor, pressure signal controller, Fill valve, explosion relief valve group; The output shaft of main frame is connected with main pump main shaft, two mouths of main pump stretch out chamber hydraulic fluid port B with luffing hydraulic actuating cylinder retraction chamber hydraulic fluid port A, luffing hydraulic actuating cylinder respectively, luffing hydraulic actuating cylinder retraction chamber hydraulic fluid port A, luffing hydraulic actuating cylinder stretch out the by pass valve of chamber hydraulic fluid port B, and the Fill valve that luffing hydraulic actuating cylinder retraction chamber hydraulic fluid port A, luffing hydraulic actuating cylinder stretch out chamber hydraulic fluid port B connects;
The oil outlet of luffing control cock connects explosion relief valve group and is communicated with the second actuator port A2, the 4th actuator port B2; The valve control inputs signal of controller is connected with the control end of luffing control cock and explosion relief valve group by in2 mouth;
Pressure sensor is connected on the actuator port between by pass valve and explosion relief valve group, the fuel injection pressure signal that pressure sensor collects is entered pressure signal controller and is exported by o1 mouth, the pump control signal of controller enters luffing control system from in1 mouth and controls main capacity of pump, realizes the control to luffing hydraulic actuating cylinder.
8. the control loop of a kind of lifting machine lifting appliance according to claim 1, when it is characterized in that described control handle produces principal arm dropping signal, controller receives dropping signal by resolving, control signal is outputted to equipment drive circuit, and enter the signal input part of luffing control cock, luffing control cock moves to right position, and the 4th actuator port is fuel-displaced, the second actuator port oil return; With Time Controller, control signal is outputted to luffing recovery controller, luffing recovery controller opens apportioning valve by resolving driving; Due to the deadweight of equipment, luffing hydraulic actuating cylinder starts to fall, the fluid promoting to stretch out chamber gets back to the second actuator port by stretching out chamber hydraulic fluid port, and the fluid promoting recycling cavity enters luffing Ethylene recov pressing system by luffing hydraulic actuating cylinder recycling cavity hydraulic fluid port simultaneously, passing ratio valve enters balance energy accumulator, and the part energy in dropping process is stored in balance energy accumulator;
When control handle produces principal arm lifting signal, controller receives lifting signal and by resolving, control signal is outputted to equipment drive circuit, and enters the signal input part of luffing control cock, luffing control cock moves to left position, and the 4th actuator port is fuel-displaced, the second actuator port oil return; With Time Controller, control signal is outputted to luffing recovery system controller, luffing recovery system controller opens apportioning valve by resolving driving; Main pump exports fluid with minimum injection rate, the pressure sensor of the 4th actuator port is made to produce pressure signal, this pressure signal outputs to controller by pressure signal controller, convert discharge of main pump signal to by resolving of controller and output to equipment drive circuit, and enter the signal input part of main pump, main pump pivot angle increases, and discharge capacity increases, and makes fluid enter retraction chamber by the retraction chamber hydraulic fluid port of luffing hydraulic actuating cylinder; Meanwhile, the opening of the fluid passing ratio valve of balance energy accumulator enters the recycling cavity of luffing hydraulic actuating cylinder, and recycling cavity and retraction cavity pressure drive luffing hydraulic actuating cylinder to stretch out simultaneously, make principal arm lifting; In the process of the continuous lifting of principal arm and decline, the pressure of balance energy accumulator is by counter balance pocket pressure sensor monitoring; When the pressure of balance energy accumulator is excessive, the large pressure signal of counter balance pocket pressure sensor enters luffing recovery controller, open counter balance pocket electromagnetic valve and pressure regulating cavity electromagnetic valve, and drive servomotor to drive fix-displacement pump to transfer in pressure regulation energy storage by the high pressure oil of balance energy accumulator; When the pressure of balance energy accumulator is too small, the little pressure signal of counter balance pocket pressure sensor enters luffing recovery controller, open counter balance pocket electromagnetic valve and pressure regulating cavity electromagnetic valve, and drive servomotor to drive fix-displacement pump to transfer in balance energy accumulator by the hydraulic oil of pressure regulation energy storage; Pressure regulating cavity pressure sensor monitoring pressure regulation energy storage pressure, in pressure regulating cavity hypertonia and cannot to balance end shift alarm prompting pressure release, in pressure regulating cavity hypotony and balance end cannot shift fluid to pressure regulating cavity time prompting low pressure, and by luffing recovery system inflation ftercompction.
9. the control loop of a kind of lifting machine lifting appliance according to claim 1, when it is characterized in that described control handle produces principal arm retraction signal, controller receives retraction signal by resolving, retraction control signal is outputted to equipment to drive, and enter the signal input part of extension and contraction control valve, extension and contraction control valve moves to right position, and the 3rd actuator port is fuel-displaced, the first actuator port oil return; Retraction control signal being outputted to flexible recovery system controller simultaneously, opening apportioning valve by resolving driving;
When control handle generation principal arm stretches out signal, controller receives and stretches out signal and by resolving, control signal will be stretched out and output to equipment drive circuit, and enter the signal input part of extension and contraction control valve, extension and contraction control valve moves to left position, and the 3rd actuator port is fuel-displaced, the first actuator port oil return; Control signal being stretched out simultaneously and output to flexible recovery controller, opening apportioning valve by resolving driving; Main pump exports fluid with minimum injection rate, the pressure sensor of the 3rd actuator port is made to produce pressure signal, this pressure signal outputs to controller by pressure signal controller, convert discharge of main pump signal to by resolving of controller and output to equipment drive circuit, and enter the signal input part of main pump, main pump pivot angle increases, and discharge capacity increases, and makes fluid enter retraction chamber by the retraction chamber hydraulic fluid port of telescopic hydraulic cylinder; Meanwhile, the opening of the fluid passing ratio valve of balance energy accumulator enters the recycling cavity of telescopic hydraulic cylinder, and recycling cavity and retraction cavity pressure drive telescopic hydraulic cylinder to stretch out simultaneously, and arm is extended;
Constantly to extend and in the process that shortens at arm, the pressure of balance energy accumulator is by counter balance pocket pressure sensor monitoring, when the pressure of balance energy accumulator is excessive, the large pressure signal of counter balance pocket pressure sensor enters flexible recovery controller, open counter balance pocket electromagnetic valve and pressure regulating cavity electromagnetic valve, and drive servomotor to drive fix-displacement pump to transfer in pressure regulation energy storage by the high pressure oil of balance energy accumulator; When the pressure of balance energy accumulator is too small, the little pressure signal of counter balance pocket pressure sensor enters flexible recovery controller, open counter balance pocket electromagnetic valve and pressure regulating cavity electromagnetic valve, and drive servomotor to drive fix-displacement pump to transfer in balance energy accumulator by the hydraulic oil of pressure regulation energy storage; Pressure regulating cavity pressure sensor monitoring pressure regulation energy storage pressure, in pressure regulating cavity hypertonia and cannot to balance end shift alarm prompting pressure release, in pressure regulating cavity hypotony and balance end cannot shift fluid to pressure regulating cavity time prompting low pressure, and by flexible recovery system inflation ftercompction.
10. a kind of control loop of lifting machine lifting appliance according to claim 1 or 4 or 8 or 9, what it is characterized in that the first actuator port A1 of described equipment drive circuit is connected to telescopic hydraulic cylinder stretches out on the hydraulic fluid port B mouth of chamber, 3rd actuator port B1 of equipment drive circuit is connected on the retraction chamber hydraulic fluid port A mouth of telescopic hydraulic cylinder, what the second actuator port A2 of equipment drive circuit was connected to luffing hydraulic actuating cylinder stretches out on the hydraulic fluid port B mouth of chamber, and the 4th actuator port B2 of equipment drive circuit 3 is connected on the retraction chamber hydraulic fluid port A mouth of luffing hydraulic actuating cylinder.
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| CN107161898A (en) * | 2017-07-06 | 2017-09-15 | 杭州华泰电液成套技术有限公司 | The hydraulic control system and its method of a kind of tension windlass |
| CN107161898B (en) * | 2017-07-06 | 2018-11-06 | 杭州流控机器制造有限公司 | A kind of hydraulic control system and its method of tension windlass |
| CN112576579A (en) * | 2020-12-07 | 2021-03-30 | 山东百海逸机电股份有限公司 | Pressure maintaining type hydraulic control system of disc type braking device |
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