CN205087870U - A automatically controlled hydraulic drive system for industry vehicle - Google Patents
A automatically controlled hydraulic drive system for industry vehicle Download PDFInfo
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- CN205087870U CN205087870U CN201520814011.3U CN201520814011U CN205087870U CN 205087870 U CN205087870 U CN 205087870U CN 201520814011 U CN201520814011 U CN 201520814011U CN 205087870 U CN205087870 U CN 205087870U
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Abstract
The utility model relates to an automatically controlled hydraulic drive system for industry vehicle only drives the variable pump and makes variable frequency speed governing(VFSG) with a motor, a microcomputer control ware, carries the hydraulic oil in the hydraulic tank for running gear, tilt mechanism, hoist mechanism, steering mechanism, kinetic energy recovery mechanism, potential energy recovery mechanism and walking speed limit body, in vehicle walking, slope, promotion and go to action, realizes the off -load of kinetic energy recovery, heavily loaded potential energy recovery and empty load and underloading, through walking speed limit body, the restriction speed of a motor vehicle makes the vehicle walking steady, when sliding slope, braking, hydraulic system can mend oil automatically, during the vehicle climbing, the variable pump carries out the automatic variable according to load pressure adjustment value, reaches the big moment of torsion climbing function of low -speed, and the electric current of just climbing is low. The motor comprises permanent magnet brushless motor, frequency -variable controller and variable piston pump, zero current starting to load current, and there is not the start -up heavy current in the activation time, the energy saving in millimeter level scope.
Description
Technical field
The utility model belongs to industrial vehicle technical field, is specifically related to a kind of Electro-hydraulic drive system for industrial vehicle.
Background technology
The highway Mobile Equipment sold in the market and use and electronic work vehicle, comprise counterweight motor-driven forklift, shift-forward type electri forklift, multidirectional electri forklift and stacking battery-driven car etc., its walking, lifting and leaning device adopt phase asynchronous induction motor (being called for short AC motor) popular in the world mostly, but these equipments and vehicle exist following defect:
1) starting current is large; When the Hang Qian Jin of vehicle Pin Fan Jin and retrogressing operating mode, motor is in braking and consumes energy greatly with the electric current started;
2) electric current is climbed greatly (needing 2 ~ 3 times of rated current);
3) AC motor have that power factor is low, low speed time the defect such as the low and efficient district of motor of efficiency is narrow;
4) import barrier actuator cost is high;
5) vehicle is without potential energy regenerative feedback technology;
6) re-lighting simultaneously of many motors and operation, causes superposition to start and runs big current, and make the capacity discharge current of lead-acid storage battery decline 40%, cause operating cost to increase, charging duration extends, and vehicle uses handling efficiency to decline;
7) common electric fork truck is when pitching picking thing and declining, by the throttling of valve, control goods descending speed, the potential energy that goods declines in this process changes into the heat energy of hydraulic efficiency pressure system, makes fluid temperature rise, long-term operation like this, oil deteriorate can be caused, affect reliability and the work efficiency of Hydraulic Elements, simultaneously owing to exchanging hydraulic oil, use cost increases;
8) electri forklift (comprising external existing electri forklift) of domestic production at present, fork-truck steering device and lifting and leaning device adopt same hydraulic efficiency pressure system, because lift system driving power is large, ask short during lifting, steering hardware driving power is little, driving time is long, lift system and steering hardware driving power differ more than 10 times, and driving time differs tens times, are typical low load with strong power, cause energy loss, use cost is high.
There is following defect in existing patent WO2009/100378:
1) traveling gear is when full speed running, and mechanical efficiency declines and reaches 18%;
2) operate complicated, affect handling efficiency;
3) lift system can not automatically controlled speed governing, there is throttling loss;
4) without dynamic, potential energy regenerative feedback technology;
5) stop mechanism and the loss of HM Hydraulic Motor back pressure serious.
There is following shortcoming in patent 200410016648.4:
1) fluid enters cooling in motor, and be full of hydraulic oil between rotor and stator, be subject to the impact of oil viscosity during rotor turns, rotor rotating speed consumes energy when more than 1500r/min and reaches more than 50% of rating horsepower;
2) two hydraulic control one-way valves are set in running gear, make system complex, increase cost and energy consumption;
3) in traveling gear when slipping by slope owing to not slipping by slope speed limit, driving can be caused to make operator bring mental burden and danger;
4) lack repairing mechanism in car brakeing with when slipping by slope, components and parts can be caused to damage;
5) lift system is when declining regeneration, needs to operate when promoting distributing valve and being in meta, and the easy maloperation of operator, affects handling efficiency.
Utility model content
For the defect that above-mentioned prior art exists, the technical problems to be solved in the utility model is to provide a kind of Electro-hydraulic drive system for industrial vehicle, this drive system only adopts a motor, a controller and controllable capacity pump, just can realize the recovery of potential energy and kinetic energy while carrying out vehicle operation and steering operation, structure is simple, cost is low.
For solving the problems of the technologies described above, the utility model have employed following technical scheme:
A kind of Electro-hydraulic drive system for industrial vehicle, comprise the storage battery for propulsion source, microcomputerized controller, electrical motor, hydraulic reservoir, vehicle operation mechanism, steering hardware, and for the controllable capacity pump to described vehicle operation mechanism and steering hardware conveying liquid force feed, wherein said vehicle operation mechanism comprises traveling gear, leaning device, lift system, potential energy recovering mechanism and walking speed limiting mechanism, it is characterized in that: storage battery provides power by microcomputerized controller to electrical motor, electrical motor drives controllable capacity pump work, pass through traveling gear, leaning device, lift system and steering hardware, realize the walking of vehicle, tilt, promote and handling maneuver, when lift system is in heavy load descending, by potential energy recovering mechanism, the potential energy of heavily loaded goods is reclaimed and is used for battery charge, when lift system is in zero load or underloading declines, realize off-load by potential energy recovering mechanism, by walking speed limiting mechanism, restricted speed, makes car smooth running.
Described hydraulic reservoir is multistage combined hydraulic reservoir, and this multistage combined hydraulic reservoir comprises the next fuel tank; In the next fuel tank, oil temperature sensor, microcomputerized controller, electrical motor, controllable capacity pump, speed sensor, the first check valve, hydraulic oil, level sensor, kinetic energy regeneration solenoid valve, potential energy regeneration valve are installed; Electrical motor coaxially connects with controllable capacity pump.
Described potential energy recovering mechanism, comprise and promote change-over valve, elevating ram, pressure sensor, potential energy regeneration valve and controllable capacity pump, described potential energy regeneration valve is potential energy regeneration solenoid valve; When elevating ram is in heavy load descending, pressure sensor is according to the height of oil pressure, send signal to microcomputerized controller, potential energy regeneration solenoid valve is made to be in closed circuit state, load hydraulic oil in elevating ram is through oil circuit, the oil inlet promoting change-over valve, oil circuit entering variable pump, and at this moment controllable capacity pump becomes HM Hydraulic Motor operating mode, and driving electric machine is electrical generator operating mode, controlled the descending speed of elevating ram by microcomputerized controller, the potential energy of generation is to battery charge; When elevating ram is in zero load or underloading declines, pressure sensor sends signal to microcomputerized controller, potential energy regeneration solenoid valve is made to be in channel status, when elevating ram declines, hydraulic oil in elevating ram, through oil circuit, lifting change-over valve, oil circuit, potential energy regeneration solenoid valve, oil circuit, directly returns the next fuel tank.
Described potential energy recovering mechanism, comprises and promotes change-over valve, elevating ram, oil circuit, potential energy regeneration valve and controllable capacity pump, and described potential energy regeneration valve is potential energy regeneration hydraulic operated valve; When elevating ram is in heavy load descending, load hydraulic oil in elevating ram promotes potential energy regeneration hydraulic operated valve through oil circuit, make potential energy regenerate hydraulic operated valve and be in closed circuit state, load hydraulic oil in elevating ram is through oil circuit, the oil inlet promoting change-over valve, oil circuit entering variable pump, at this moment controllable capacity pump becomes HM Hydraulic Motor operating mode, driving electric machine is electrical generator operating mode, and controlled the descending speed of elevating ram by microcomputerized controller, the potential energy of generation is to battery charge; When lift system is in zero load or underloading, hydraulic oil in elevating ram promotes potential energy regeneration hydraulic operated valve through oil circuit, make potential energy regenerate hydraulic operated valve and be in channel status, when elevating ram declines, hydraulic oil in elevating ram, through oil circuit, lifting change-over valve, oil circuit, potential energy regeneration hydraulic operated valve, oil circuit, directly returns the next fuel tank.
Described vehicle operation structure also comprises recover kinetic energy mechanism, when vehicle slips by slope and run slowly, by recover kinetic energy mechanism, the regeneration kinetic energy of vehicle is stored in storage battery, described recover kinetic energy mechanism, comprises microcomputerized controller, electrical motor, controllable capacity pump, speed sensor, walking change-over valve, HM Hydraulic Motor, acceleration pedal, acceleration pick-up and kinetic energy regeneration solenoid valve, at car retardation or when slipping by slope operation, acceleration pedal lifts, corresponding signal is exported by acceleration pick-up, the actual speed that microcomputerized controller records the speed sensor of electrical motor is greater than the given speed of acceleration pick-up, microcomputerized controller (3) exports high level, kinetic energy regeneration solenoid valve is made to become channel status, under the inertia of vehicle drives, HM Hydraulic Motor operating mode becomes the operating mode of hydraulic oil pump, the hydraulic oil that HM Hydraulic Motor exports is by the second check valve, 3rd check valve, oil circuit, kinetic energy regeneration solenoid valve, the oil inlet of entering variable pump, controllable capacity pump is made to become HM Hydraulic Motor operating mode, driving electric machine is electrical generator operating mode, pass through microcomputerized controller, to battery charge.
Described walking speed limiting mechanism, comprises HM Hydraulic Motor, walking change-over valve and governor valve; Vehicle be in slip by slope state time, due to the existence of car load inertia, HM Hydraulic Motor still spends operation in tempo, controllable capacity pump can be caused for shortage of oil, and in oil circuit, hydraulic fluid pressure declines, and in oil circuit, hydraulic fluid pressure declines simultaneously, governor valve valve port turns down gradually, makes HM Hydraulic Motor smooth operation.
Described traveling gear, comprises microcomputerized controller, electrical motor, controllable capacity pump, incidence regulating mechanism, the first check valve, walking change-over valve, HM Hydraulic Motor, governor valve, the second check valve and the 3rd check valve; Controllable capacity pump oil inlet is equipped with the first check valve, and walking change-over valve is connected by oil circuit with the first check valve, HM Hydraulic Motor oil inlet and outlet and governor valve; When vehicle advances operation, walking change-over valve handle is placed in forward position, to put one's foot down, acceleration pedal drives acceleration pick-up to send signal to microcomputerized controller, microcomputerized controller produces corresponding frequencies and voltage signal, and driving motor rotates, and electrical motor drives controllable capacity pump to export corresponding hydraulic oil, hydraulic oil, through oil circuit, walking change-over valve, oil circuit, drives HM Hydraulic Motor work; When vehicle is climbed, the load pressure of controllable capacity pump raises, and controllable capacity pump carries out automatic variable according to load pressure setting by incidence regulating mechanism, reaches low-speed big climbing; When vehicle will stop using, decontrol acceleration pedal, step on brake pedal, promote brake pump output hydraulic pressure oil, by brake circuit, HM Hydraulic Motor is braked by drg, vehicle shuts down, this micro-switch action simultaneously linked with brake pedal, brake activation valve is made to be switched to conduction position, the oil inlet and outlet of HM Hydraulic Motor is communicated with, HM Hydraulic Motor is in braking mode, and microcomputerized controller makes electrical motor drive controllable capacity pump to provide hydraulic oil with certain hour and speed with predetermined set program simultaneously, cheats described traveling gear repairing.
Described leaning device, comprise inclined reversing valve, dump ram and tilt switch, inclined reversing valve is connected by oil circuit with dump ram; When operating the handle of inclined reversing valve, tilt switch output switch amount signal is to microcomputerized controller, and preset instructions signal is sent to electrical motor by microcomputerized controller, drives controllable capacity pump to export corresponding hydraulic oil, through oil circuit, inclined reversing valve, oil circuit, dump ram is completed lean forward, hypsokinesis action.
Described lift system, comprises and promotes change-over valve, lifting displacement pickup and elevating ram, promotes change-over valve and is connected by oil circuit with elevating ram; When promoting change-over valve handle and being switched to lifting shelves, microcomputerized controller is outputed signal to by promoting displacement pickup, microcomputer controls to send signal control electrical motor and rotates, controllable capacity pump is driven to export corresponding hydraulic oil, through oil circuit, promote change-over valve, oil circuit, make elevating ram do to promote operation by freight lifting to assigned address.
Described electrical motor (1) is made up of permanent magnetic brushless, frequency-variable controller and Variable plunger pump, and described permanent magnetic brushless is unloaded and be with a year starting current to be that zero current starts to load current, and run up time is in grade scope; Described traveling gear, between leaning device and lift system be serial or parallel connection oil circuit connect.
Compared with prior art, the utility model has following advantage:
(1) the utility model only adopts a motor and a controller and variable delivery hydraulic system, realizes the walking of vehicle, turns to, and promotes, the functions such as inclinations, realizes recover kinetic energy and potential energy reclaims simultaneously, and simply, cost is low for structure.
(2) the utility model realizes dual speed governing: be a kind ofly the delivery rate of variable frequency adjustment Hydraulic Pump thus realize speed governing, and another kind is the automatic regulation output flow of controllable capacity pump thus realizes speed governing.Frequency control avoids the throttling governing loss of power consumption, and controllable capacity pump is implemented automated torque and switched, and has both improve vehicle hill climbing ability, turn avoid heavy-current discharge during vehicle climbing.Compared with existing domestic similar fork truck, more than one times, the end, falls in climbing big current, improves battery discharging volumetric efficiency.
(3) the utility model Combined oil tank, the oil injection type realizing electromechanical is installed, and about electric elements does not contact with air, significantly reduces Noise of Hydraulic System, has waterproof, explosion-proof, cooling function.
(4) the utility model motor starting is short to the mode of operation time: electrical motor is under full load, and only need≤600 milliseconds of times to realize electrical motor zero start to load current, this is a breakthrough of electri forklift technology.
Accompanying drawing explanation
Fig. 1: the workflow diagram of the utility model electric-controlled hydraulic control system;
Fig. 2: the hydraulic circuit figure of the utility model embodiment one;
Fig. 3: the hydraulic circuit figure of the utility model embodiment two;
Fig. 4: the hydraulic circuit figure of the utility model embodiment three;
Fig. 5: the hydraulic circuit figure of the utility model embodiment four.
Attached number in the figure illustrates:
1-storage battery; 2-oil temperature sensor; 3-microcomputerized controller; 4-electrical motor; 5-controllable capacity pump; 6-incidence regulating mechanism; 7-speed sensor; 8-the first check valve; 9-oil circuit; 10-hydraulic oil; 11-level sensor; 12-walking change-over valve; 13-promote change-over valve; 14-inclined reversing valve; 15-oil circuit; 16-tilt switch; 17-oil circuit; 18-dump ram; 19-pressure-gradient control valve; 20-oil circuit; 21-oil circuit; 22-oil circuit; 23-promote displacement sensing to rise device; 24-deflector; 25-drg; 26-drg; 27-oil circuit; 28-elevating ram; 29-oil circuit; 30-HM Hydraulic Motor; 31-HM Hydraulic Motor; 32-oil circuit; 33-oil circuit; 34-oil circuit; 35-oil circuit; 36-acceleration pedal; 37-acceleration pick-up; 38-upper fuel tank; 39-oil circuit; 40-the next fuel tank; 41-governor valve; 42-oil circuit; 43-kinetic energy regeneration solenoid valve; 44-the second check valve; 45-the three check valve; 46-potential energy regeneration solenoid valve; 47-pressure sensor; 48-potential energy regeneration hydraulic operated valve; 49-oil circuit; 50-brake pump; 51-brake pedal; 52-brake circuit; 53-safety valve; 54-by pass valve; 55-brake activation valve; 56-micro-switch; 57-oil circuit; 58-oil suction; 59-oil circuit; 60-oil circuit.
Detailed description of the invention
Be described further below with reference to the technique effect of accompanying drawing to design of the present utility model, concrete structure and generation, to understand the purpose of this utility model, characteristic sum effect fully.
As shown in Figure 1, a kind of Electro-hydraulic drive system for industrial vehicle, comprise for the storage battery 1 of propulsion source, microcomputerized controller 3, electrical motor 4, hydraulic reservoir, vehicle operation mechanism, steering hardware and for the controllable capacity pump 5 to described vehicle operation mechanism and steering hardware conveying liquid force feed, wherein said vehicle operation mechanism comprises traveling gear, leaning device, lift system, recover kinetic energy mechanism, potential energy recovering mechanism and walking speed limiting mechanism.The workflow of this system is: storage battery 1 provides power to electrical motor 4 by microcomputerized controller 3, electrical motor 4 drives controllable capacity pump 5 to work, by traveling gear, leaning device, lift system and steering hardware, realize the walking of vehicle, inclination, lifting and handling maneuver; When lift system is in heavy load descending, by potential energy recovering mechanism, the recovery of the potential energy of heavily loaded goods is used for storage battery 1 and charges; When lift system is in zero load or underloading declines, realize off-load by potential energy recovering mechanism; When vehicle slips by slope and run slowly, by recover kinetic energy mechanism, the regeneration kinetic energy of vehicle is stored in storage battery 1; By walking speed limiting mechanism, restricted speed, makes car smooth running.
Embodiment one
With reference to the hydraulic circuit figure of Fig. 2, each mechanism of illustrating this Electro-hydraulic drive system forms and how to realize described function.
Described hydraulic reservoir is multistage combined hydraulic reservoir, this multistage combined hydraulic reservoir comprises the next fuel tank 40, is provided with oil temperature sensor 2, microcomputerized controller 3, electrical motor 4, controllable capacity pump 5, speed sensor 7, first check valve 8, hydraulic oil 10, level sensor 11, kinetic energy regeneration solenoid valve 43, potential energy regeneration solenoid valve 46 in the next fuel tank 40; Electrical motor 4 coaxially connects with controllable capacity pump 5; The information input microcomputerized controller 3 that level sensor 11 and oil temperature sensor 2 export, when microcomputerized controller 3 detects that the liquid level of hydraulic oil 10 is increased beyond predetermined value lower than a certain position and/or oil temperature, output alarm signal or shut down by force immediately.
(1) walking runs
Described traveling gear, comprise microcomputerized controller 3, electrical motor 4, controllable capacity pump 5, incidence regulating mechanism 6, first check valve 8, walking change-over valve 12, HM Hydraulic Motor 30,31, governor valve 41, second check valve 44 and the 3rd check valve 45; The first check valve 8 is equipped with at oil inlet 58 place of controllable capacity pump 5, and oil inlet and outlet and the governor valve 41 of walking change-over valve 12 and the first check valve 8, HM Hydraulic Motor 30,31 are connected by oil circuit.
When vehicle advances operation, walking change-over valve 12 handle is placed in forward position, to put one's foot down 36, acceleration pedal 36 drives acceleration pick-up 37 to send signal to microcomputerized controller 3, microcomputerized controller 3 produces corresponding frequencies and voltage signal, and driving motor 4 rotates, and electrical motor 4 drives controllable capacity pump 5 to export corresponding hydraulic oil, hydraulic oil, through oil circuit 20, walking change-over valve 12, oil circuit 32, drives HM Hydraulic Motor 30,31 to work.Hydraulic oil hydraulic fluid pressure in oil circuit 33, walking change-over valve 12, oil circuit 35, governor valve 41(at this moment oil circuit 20 of HM Hydraulic Motor 30,31 raises, through oil circuit 42, promote governor valve 41 open), oil circuit 49, upper fuel tank 38, oil circuit 39, flow to fuel tank 40, complete hoofing part.By the signal that the acceleration pick-up 37 of acceleration pedal 36 exports, the rotating speed controlling electrical motor 4 and controllable capacity pump 5 exports corresponding hydraulic oil, HM Hydraulic Motor 30,31 is rotated and reaches corresponding speed, adapts to the speed of travel driving vehicle.
(2) climbing runs
When vehicle climbing runs, the load pressure of controllable capacity pump 5 is greater than setting, controllable capacity pump 5 is by incidence regulating mechanism 6 self-adjustable inclination, controllable capacity pump 5 exports high pressure liquid force feed with small displacement, the load torque of HM Hydraulic Motor 30,31 is increased, spin down, vehicle does low-speed high-torque and runs when climbing.Electrical motor 4, in rated operating range running, limits the heavy-current discharge of storage battery 1, and climbing electric current is low by 50% compared with same types of vehicles, economize energy.
(3) brake
When vehicle will stop using, decontrol acceleration pedal 36, step on brake pedal 51, promote brake pump 50 output hydraulic pressure oil, by brake circuit 52, HM Hydraulic Motor 30,31 is braked by drg 25,26, vehicle shuts down.This micro-switch 56 action simultaneously linked with brake pedal 51, make brake activation valve 55 be switched to conduction position, the oil inlet and outlet of HM Hydraulic Motor 30,31 is communicated with, and HM Hydraulic Motor 30,31 is in braking mode.Microcomputerized controller 3 makes electrical motor 4 drive controllable capacity pump 5 to provide hydraulic oil with certain hour and speed with predetermined set program simultaneously, cheats described traveling gear repairing.
(4) recover kinetic energy
Described recover kinetic energy mechanism, comprise microcomputerized controller 3, electrical motor 4, controllable capacity pump 5, speed sensor 7, walking change-over valve 12, HM Hydraulic Motor 30,31, acceleration pedal 36, acceleration pick-up 37 and kinetic energy regeneration solenoid valve 43.
When car retardation or when slipping by slope operation, will speed up pedal 36 to lift, corresponding signal is exported by acceleration pick-up 37, the actual speed that microcomputerized controller 3 records the speed sensor 7 of electrical motor 4 is greater than the given speed of acceleration pick-up 37, microcomputerized controller 3 exports high level, make kinetic energy regeneration solenoid valve 43 one-tenth channel status, under the inertia of vehicle drives, HM Hydraulic Motor 30, 31 operating modes become the operating mode of hydraulic oil pump, HM Hydraulic Motor 30, 31 hydraulic oil exported are by the second check valve 44, 3rd check valve 45, oil circuit 29, kinetic energy regeneration solenoid valve 43, the oil inlet 58 of entering variable pump 5, due to the existence of check valve 8, controllable capacity pump 5 becomes HM Hydraulic Motor operating mode, and driving electric machine 4, in electrical generator operating mode, by microcomputerized controller 3, charges to storage battery 1.
(5) speed limit walking runs
Described walking speed limiting mechanism, comprises HM Hydraulic Motor 30,31, walking change-over valve 12 and governor valve 41.
Vehicle be in slip by slope state time, due to the existence of car load inertia, HM Hydraulic Motor 30,31 still spends operation in tempo, controllable capacity pump 5 can be caused for shortage of oil, in oil circuit 20, hydraulic fluid pressure declines, in oil circuit 42, hydraulic fluid pressure declines simultaneously, and governor valve 41 valve port turns down gradually, makes HM Hydraulic Motor 30,31 smooth operation.
(6) slant operation
Described hydraulic-driven leaning device, comprises inclined reversing valve 14, dump ram 18 and tilt switch 16, and inclined reversing valve 14 is connected by oil circuit 34,57 with dump ram 18.
When operating the handle of inclined reversing valve 14, tilt switch 16 output switch amount signal is to microcomputerized controller 3, preset instructions signal is sent to electrical motor 4 by microcomputerized controller 3, controllable capacity pump 5 is driven to export corresponding hydraulic oil, through oil circuit 20, inclined reversing valve 14, oil circuit 34,57, dump ram 18 is completed lean forward, hypsokinesis action.
(7) operation is promoted
Described lift system, comprises and promotes change-over valve 13, lifting displacement pickup 23 and elevating ram 28, promotes change-over valve 13 and is connected by oil circuit 17 with elevating ram 28.
When promoting change-over valve 13 handle and being switched to raised position, microcomputerized controller 3 is outputed signal to by promoting displacement pickup 23, microcomputerized controller 3 sends signal, control electrical motor 4 to rotate, controllable capacity pump 5 is driven to export corresponding hydraulic oil, through oil circuit 20, promote change-over valve 13, oil circuit 17, elevating ram 28 is done and promotes operation by freight lifting to assigned address.
(8) potential energy reclaims and off-load
Described potential energy recovering mechanism, comprises and promotes change-over valve 13, elevating ram 28, pressure sensor 47, potential energy regeneration solenoid valve 46 and controllable capacity pump 5.
When promoting change-over valve 13 handle and being switched to lower downshift, if elevating ram 28 is heavy duty, pressure sensor 47 is according to the height of oil pressure, send signal to microcomputerized controller 3, make potential energy regeneration solenoid valve 46 be in closed circuit state, the load hydraulic oil in elevating ram 28 is through oil circuit 17, the oil suction 58 promoting change-over valve 13, oil circuit 22 entering variable pump 5; Due to the effect of check valve 8, at this moment controllable capacity pump 5 becomes HM Hydraulic Motor operating mode, and driving electric machine 4 is in electrical generator operating mode, and controlled the descending speed of elevating ram 28 by microcomputerized controller 3, the potential energy of generation charges to storage battery 1.
When promoting change-over valve 13 handle and being switched to lower downshift, if elevating ram 28 is unloaded or underloading, pressure sensor 47 sends signal to microcomputerized controller 3, potential energy regeneration solenoid valve 46 is made to be in channel status, when elevating ram 28 declines, hydraulic oil in elevating ram 28, by oil circuit 17, lifting change-over valve 13, oil circuit 22, potential energy regeneration solenoid valve 46 and oil circuit 27, directly returns the next fuel tank 40.
Motor 1 in described fluid power system is made up of permanent magnetic brushless, frequency-variable controller, Variable plunger pump, and permanent magnetic brushless is unloaded and be with a year starting current to be that zero current starts to load current, and run up time is in grade scope.
The oil circuit that described hydraulic efficiency pressure system carries out serial or parallel connection by walking change-over valve 12, lifting change-over valve 13 and inclined reversing valve 14 pairs of traveling geaies, leaning device and lift systems is connected, circuit parallel can realize interlocking, make each operating mode can not simultaneously action, make the safe operation process of vehicle, reliable, disastrous accident is less likely to occur, there is not superimposed current causes battery discharging volumetric efficiency degradation situation simultaneously, both accumulator capacity was saved, reduce charging duration and charging expense, improve vehicle utilization again.
Embodiment two
Fig. 3 and Fig. 2 compares, and potential energy recovering mechanism is different, and other mechanism is identical; Particularly, substitute potential energy regeneration solenoid valve 46 with potential energy regeneration hydraulic operated valve 48, correspondingly substitute pressure sensor 47 with oil circuit 15.For simplicity, Fig. 3 eliminates recover kinetic energy mechanism.
When promoting change-over valve 13 handle and being switched to lower downshift, if elevating ram 28 is heavy duty, load hydraulic oil in elevating ram 28 promotes potential energy regeneration hydraulic operated valve 48 through oil circuit 15 and is in closed circuit state, and the load hydraulic oil in elevating ram 28 is through oil circuit 17, the oil inlet 58 promoting change-over valve 13, oil circuit 22 entering variable pump 5; Due to the effect of the first check valve 8, at this moment controllable capacity pump 5 becomes HM Hydraulic Motor operating mode, and driving electric machine 4 is in electrical generator operating mode, and controlled the descending speed of elevating ram 28 by microcomputerized controller 3, the potential energy of generation charges to storage battery 1.
When promoting change-over valve 13 handle and being switched to lower downshift, if elevating ram 28 is unloaded or underloading, the hydraulic oil in elevating ram 28 promotes potential energy regeneration hydraulic operated valve 48 through oil circuit 15, makes potential energy regenerate hydraulic operated valve 48 and is in channel status; When elevating ram 28 declines, the hydraulic oil in elevating ram 28, by oil circuit 17, lifting change-over valve 13, oil circuit 22, potential energy regeneration hydraulic operated valve 46 and oil circuit 27, directly returns the next fuel tank 40.
Embodiment three
Fig. 4 and Fig. 3 compares, and adds pressure-gradient control valve 19, and other mechanism is identical.For simplicity, Fig. 4 eliminates recover kinetic energy mechanism.
When bend the throttle 36, accelerator sensor 37 sends instruction and cheats microcomputerized controller 3, electrical motor 4 drives controllable capacity pump 5 output hydraulic pressure oil by the road 20, hydraulic oil is defeated by pressure-gradient control valve 19, pressure-gradient control valve 19 delivery conduit is divided into two tunnels, the effect that one tunnel connects deflector 24(pressure-gradient control valve 19 ensures that using of deflector 24 is oily), another road connects walking change-over valve 12.
Embodiment four
Fig. 5 and Fig. 2 compares, and adds pressure-gradient control valve 19, and other mechanism is identical.For simplicity, Fig. 5 eliminates recover kinetic energy mechanism.
When bend the throttle 36, accelerator sensor 37 sends instruction and cheats microcomputerized controller 3, electrical motor 4 drives controllable capacity pump 5 output hydraulic pressure oil by the road 20, hydraulic oil is defeated by pressure-gradient control valve 19, pressure-gradient control valve 19 delivery conduit is divided into two tunnels, the effect that one tunnel connects deflector 24(pressure-gradient control valve 19 ensures that using of deflector 24 is oily), another road connects walking change-over valve 12.
According to the instruction of the present embodiment, those skilled in the art can realize the technical scheme in other the utility model protection domains completely.
Claims (10)
1. the Electro-hydraulic drive system for industrial vehicle, comprise the storage battery (1) for propulsion source, microcomputerized controller (3), electrical motor (4), hydraulic reservoir, vehicle operation mechanism, steering hardware, and for the controllable capacity pump (5) to described vehicle operation mechanism and steering hardware conveying liquid force feed, wherein said vehicle operation mechanism comprises traveling gear, leaning device, lift system, potential energy recovering mechanism and walking speed limiting mechanism, it is characterized in that: storage battery (1) provides power by microcomputerized controller (3) to electrical motor (4), electrical motor (4) drives controllable capacity pump (5) work, pass through traveling gear, leaning device, lift system and steering hardware, realize the walking of vehicle, tilt, promote and handling maneuver, when lift system is in heavy load descending, by potential energy recovering mechanism, the potential energy of heavily loaded goods is reclaimed and is used for storage battery (1) charging, when lift system is in zero load or underloading declines, realize off-load by potential energy recovering mechanism, by walking speed limiting mechanism, restricted speed, makes car smooth running.
2. a kind of Electro-hydraulic drive system for industrial vehicle according to claim 1, it is characterized in that: described hydraulic reservoir is multistage combined hydraulic reservoir, this multistage combined hydraulic reservoir comprises the next fuel tank (40); In the next fuel tank (40), oil temperature sensor (2), microcomputerized controller (3), electrical motor (4), controllable capacity pump (5), speed sensor (7), the first check valve (8), hydraulic oil (10), level sensor (11), kinetic energy regeneration solenoid valve (43), potential energy regeneration valve (46 are installed; 48); Electrical motor (4) coaxially connects with controllable capacity pump (5).
3. a kind of Electro-hydraulic drive system for industrial vehicle according to claim 2, it is characterized in that: described potential energy recovering mechanism, comprise and promote change-over valve (13), elevating ram (28), pressure sensor (47), potential energy regeneration valve (46) and controllable capacity pump (5), described potential energy regeneration valve (46) is potential energy regeneration solenoid valve, when elevating ram (28) is in heavy load descending, pressure sensor (47) is according to the height of oil pressure, send signal to microcomputerized controller (3), potential energy regeneration solenoid valve (46) is made to be in closed circuit state, load hydraulic oil in elevating ram (28) is through oil circuit (17), promote change-over valve (13), the oil inlet (58) of oil circuit (22) entering variable pump (5), at this moment controllable capacity pump (5) becomes HM Hydraulic Motor operating mode, driving electric machine (4) is in electrical generator operating mode, the descending speed of elevating ram (28) is controlled by microcomputerized controller (3), the potential energy produced charges to storage battery (1), when elevating ram (28) is in zero load or underloading declines, pressure sensor (47) sends signal to microcomputerized controller (3), potential energy regeneration solenoid valve (46) is made to be in channel status, when elevating ram (28) declines, hydraulic oil in elevating ram (28), through oil circuit (17), lifting change-over valve (13), oil circuit (22), potential energy regeneration solenoid valve (46), oil circuit (27), directly returns the next fuel tank (40).
4. a kind of Electro-hydraulic drive system for industrial vehicle according to claim 2, it is characterized in that: described potential energy recovering mechanism, comprise and promote change-over valve (13), elevating ram (28), oil circuit (15), potential energy regeneration valve (48) and controllable capacity pump (5), described potential energy regeneration valve (48) is potential energy regeneration hydraulic operated valve, when elevating ram (28) is in heavy load descending, load hydraulic oil in elevating ram (28) promotes potential energy regeneration hydraulic operated valve (48) through oil circuit (15), make potential energy regenerate hydraulic operated valve (48) and be in closed circuit state, load hydraulic oil in elevating ram (28) is through oil circuit (17), promote change-over valve (13), the oil inlet (58) of oil circuit (22) entering variable pump (5), at this moment controllable capacity pump (5) becomes HM Hydraulic Motor operating mode, driving electric machine (4) is in electrical generator operating mode, the descending speed of elevating ram (28) is controlled by microcomputerized controller (3), the potential energy produced charges to storage battery (1), when lift system is in zero load or underloading, hydraulic oil in elevating ram (28) promotes potential energy regeneration hydraulic operated valve (48) through oil circuit (15), make potential energy regenerate hydraulic operated valve (48) and be in channel status, when elevating ram (28) declines, hydraulic oil in elevating ram (28), through oil circuit (17), lifting change-over valve (13), oil circuit (22), potential energy regeneration hydraulic operated valve (48), oil circuit (27), directly returns the next fuel tank (40).
5. a kind of Electro-hydraulic drive system for industrial vehicle according to claim 1, it is characterized in that: described vehicle operation structure also comprises recover kinetic energy mechanism, when vehicle slips by slope and run slowly, by recover kinetic energy mechanism, the regeneration kinetic energy of vehicle is stored in storage battery (1), described recover kinetic energy mechanism, comprise microcomputerized controller (3), electrical motor (4), controllable capacity pump (5), speed sensor (7), walking change-over valve (12), HM Hydraulic Motor (30,31), acceleration pedal (36), acceleration pick-up (37) and kinetic energy regeneration solenoid valve (43), at car retardation or when slipping by slope operation, acceleration pedal (36) lifts, corresponding signal is exported by acceleration pick-up (37), the actual speed that microcomputerized controller (3) records the speed sensor (7) of electrical motor (4) is greater than the given speed of acceleration pick-up (37), microcomputerized controller (3) exports high level, kinetic energy regeneration solenoid valve (43) is made to become channel status, under the inertia of vehicle drives, HM Hydraulic Motor (30, 31) operating mode becomes the operating mode of hydraulic oil pump, HM Hydraulic Motor (30, 31) hydraulic oil exported is by the second check valve (44), 3rd check valve (45), oil circuit (29), kinetic energy regeneration solenoid valve (43), the oil inlet (58) of entering variable pump (5), controllable capacity pump (5) is made to become HM Hydraulic Motor operating mode, driving electric machine (4) is in electrical generator operating mode, by microcomputerized controller (3), charge to storage battery (1).
6. a kind of Electro-hydraulic drive system for industrial vehicle according to claim 1, is characterized in that: described walking speed limiting mechanism, comprises HM Hydraulic Motor (30,31), walking change-over valve (12) and governor valve (41); Vehicle be in slip by slope state time, due to the existence of car load inertia, HM Hydraulic Motor (30,31) still spend operation in tempo, controllable capacity pump (5) can be caused for shortage of oil, the interior hydraulic fluid pressure of oil circuit (20) declines, oil circuit (42) interior hydraulic fluid pressure declines simultaneously, governor valve (41) valve port turns down gradually, makes HM Hydraulic Motor (30,31) smooth operation.
7. a kind of Electro-hydraulic drive system for industrial vehicle according to claim 1, it is characterized in that: described traveling gear, comprise microcomputerized controller (3), electrical motor (4), controllable capacity pump (5), incidence regulating mechanism (6), the first check valve (8), walking change-over valve (12), HM Hydraulic Motor (30,31), governor valve (41), the second check valve (44) and the 3rd check valve (45), controllable capacity pump (5) oil inlet is equipped with the first check valve (8), and walking change-over valve (12) is connected by oil circuit with governor valve (41) with the first check valve (8), HM Hydraulic Motor (30,31) oil inlet and outlet, when vehicle advances operation, walking change-over valve (12) handle is placed in forward position, to put one's foot down (36), acceleration pedal (36) drives acceleration pick-up (37) to send signal to microcomputerized controller (3), microcomputerized controller (3) produces corresponding frequencies and voltage signal, driving motor (4) rotates, electrical motor (4) drives controllable capacity pump (5) to export corresponding hydraulic oil, hydraulic oil, through oil circuit (20), walking change-over valve (12), oil circuit (32), drives HM Hydraulic Motor (30,31) work, when vehicle is climbed, the load pressure of controllable capacity pump (5) raises, and controllable capacity pump (5) carries out automatic variable according to load pressure setting by incidence regulating mechanism (6), reaches low-speed big climbing, when vehicle will stop using, decontrol acceleration pedal (36), step on brake pedal (51), promote brake pump (50) output hydraulic pressure oil, drg (25 is made by brake circuit (52), 26) by HM Hydraulic Motor (30, 31) brake, vehicle shuts down, this micro-switch (56) action simultaneously linked with brake pedal (51), brake activation valve (55) is made to be switched to conduction position, make HM Hydraulic Motor (30, 31) oil inlet and outlet is communicated with, HM Hydraulic Motor (30, 31) braking mode is in, microcomputerized controller (3) makes electrical motor (4) drive controllable capacity pump (5) to provide hydraulic oil with certain hour and speed with predetermined set program simultaneously, cheat described traveling gear repairing.
8. a kind of Electro-hydraulic drive system for industrial vehicle according to claim 1, it is characterized in that: described leaning device, comprise inclined reversing valve (14), dump ram (18) and tilt switch (16), inclined reversing valve (14) is connected by oil circuit (34,57) with dump ram (18); When operating the handle of inclined reversing valve (14), tilt switch (16) output switch amount signal is to microcomputerized controller (3), preset instructions signal is sent to electrical motor (4) by microcomputerized controller (3), controllable capacity pump (5) is driven to export corresponding hydraulic oil, through oil circuit (20), inclined reversing valve (14), oil circuit (34,57), make dump ram (18) complete to lean forward, hypsokinesis action.
9. a kind of Electro-hydraulic drive system for industrial vehicle according to claim 1, it is characterized in that: described lift system, comprise and promote change-over valve (13), lifting displacement pickup (23) and elevating ram (28), promote change-over valve (13) and be connected by oil circuit (17) with elevating ram (28); When promoting change-over valve (13) handle and being switched to lifting shelves, microcomputerized controller (3) is outputed signal to by promoting displacement pickup (23), microcomputer controls (3) and sends signal control electrical motor (4) rotation, controllable capacity pump (5) is driven to export corresponding hydraulic oil, through oil circuit (20), promote change-over valve (13), oil circuit (17), make elevating ram (28) do to promote operation by freight lifting to assigned address.
10. a kind of Electro-hydraulic drive system for industrial vehicle according to any one of claim 1 to 9, it is characterized in that: described electrical motor (1) is made up of permanent magnetic brushless, frequency-variable controller and Variable plunger pump, described permanent magnetic brushless is unloaded and be with a year starting current to be that zero current starts to load current, and run up time is in grade scope; Described traveling gear, between leaning device and lift system be serial or parallel connection oil circuit connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520814011.3U CN205087870U (en) | 2015-04-16 | 2015-10-21 | A automatically controlled hydraulic drive system for industry vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520229386 | 2015-04-16 | ||
| CN2015202293863 | 2015-04-16 | ||
| CN201520814011.3U CN205087870U (en) | 2015-04-16 | 2015-10-21 | A automatically controlled hydraulic drive system for industry vehicle |
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| CN205087870U true CN205087870U (en) | 2016-03-16 |
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| CN201520814011.3U Withdrawn - After Issue CN205087870U (en) | 2015-04-16 | 2015-10-21 | A automatically controlled hydraulic drive system for industry vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105197840A (en) * | 2015-04-16 | 2015-12-30 | 上海市闸北区物流工程技术研究所 | Electric control hydraulic driving system for industrial vehicle |
| CN106082039A (en) * | 2016-08-26 | 2016-11-09 | 合肥搬易通科技发展有限公司 | A kind of speed limiting safety system of high-order stacking door frame |
| CN110422043A (en) * | 2019-08-30 | 2019-11-08 | 吉林大学 | A kind of hydraulic unmanned chassis of auxiliary multi-wheel combination drive |
| US20220227241A1 (en) * | 2016-12-30 | 2022-07-21 | Textron Innovations Inc. | Controlling electrical access to a lithium battery on a utility vehicle |
-
2015
- 2015-10-21 CN CN201520814011.3U patent/CN205087870U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105197840A (en) * | 2015-04-16 | 2015-12-30 | 上海市闸北区物流工程技术研究所 | Electric control hydraulic driving system for industrial vehicle |
| CN105197840B (en) * | 2015-04-16 | 2018-11-20 | 上海市闸北区物流工程技术研究所 | A kind of Electro-hydraulic drive system for industrial vehicle |
| CN106082039A (en) * | 2016-08-26 | 2016-11-09 | 合肥搬易通科技发展有限公司 | A kind of speed limiting safety system of high-order stacking door frame |
| CN106082039B (en) * | 2016-08-26 | 2018-12-11 | 合肥搬易通科技发展有限公司 | A kind of speed limiting safety system of high position stacking door frame |
| US20220227241A1 (en) * | 2016-12-30 | 2022-07-21 | Textron Innovations Inc. | Controlling electrical access to a lithium battery on a utility vehicle |
| US11865927B2 (en) * | 2016-12-30 | 2024-01-09 | Textron Innovations Inc. | Controlling electrical access to a lithium battery on a utility vehicle |
| CN110422043A (en) * | 2019-08-30 | 2019-11-08 | 吉林大学 | A kind of hydraulic unmanned chassis of auxiliary multi-wheel combination drive |
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Granted publication date: 20160316 Effective date of abandoning: 20181120 |