CN103256260B - Mobile working machine with the energy recycle device for drive motor cooler - Google Patents

Mobile working machine with the energy recycle device for drive motor cooler Download PDF

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Publication number
CN103256260B
CN103256260B CN201310051585.5A CN201310051585A CN103256260B CN 103256260 B CN103256260 B CN 103256260B CN 201310051585 A CN201310051585 A CN 201310051585A CN 103256260 B CN103256260 B CN 103256260B
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CN
China
Prior art keywords
customer
pressure
accumulator
hydraulic pressure
pump
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Expired - Fee Related
Application number
CN201310051585.5A
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Chinese (zh)
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CN103256260A (en
Inventor
E.里尔
M.贝克
S.奥施曼
J.阿姆赖因
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of CN103256260A publication Critical patent/CN103256260A/en
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Expired - Fee Related legal-status Critical Current
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Classifications

    • 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
    • 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • 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
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • 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
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20523—Internal combustion engine
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20569—Type of pump capable of working as pump and motor
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40553—Flow control characterised by the type of flow control means or valve with pressure compensating valves
    • F15B2211/40569—Flow control characterised by the type of flow control means or valve with pressure compensating valves the pressure compensating valve arranged downstream of the flow control means
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41554—Flow control characterised by the connections of the flow control means in the circuit being connected to a return line and a directional control valve
    • 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
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • 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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary output members
    • 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
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The present invention relates to a kind of mobile working machine, there are the customer of multiple first hydraulic pressure and the customer of one second hydraulic pressure, wherein the first customer includes the running driving device and/or task driven device of mobile working machine, wherein, hydraulic fluid can be transported to the first customer by the first pump with the displacement volume that can be adjusted from liquid case, hydraulic fluid can be transported to the second customer by wherein the second pump from liquid case, it is provided with internal combustion engine, the internal combustion engine and the first pump, connect to second pump rotation driving, wherein, second customer drives the blast fan that can be rotated for cooling down internal combustion engine.According to the present invention, it is provided for the accumulator for the hydraulic fluid that storage is under pressure, wherein accumulator is so fluidly connected with the first customer, the hydraulic fluid flowed back from least one first customer can be flowed in accumulator, but not reverse flow, wherein accumulator is so fluidly connected with the second customer, i.e., hydraulic pressure liquid energy flows to the second customer from accumulator.

Description

Mobile working machine with the energy recycle device for drive motor cooler
Technical field
The present invention relates to a kind of mobile working machine.
Background technology
By Bosch Rexroth（Bosch BOSCH-REXROTH）Document " the Weniger Emissionen, weniger of joint-stock company Kosten. Hydrostatische Lüfterantriebe von Rexroth（Few discharge, low cost, Rexroth static pressure Fan drive device）", the number of ordering RD 98 065 and version 09/2010 disclose some different mobile working machines, especially It is tractor, combining thresing machine, excavator and bull-dozer.These mobile working machines have the consumption of multiple first hydraulic pressure Device, the traveling drive motor particularly for driving moment or chain；And multiple regulation such as cantilevers, land leveller that are used for are pushed away The task driven device of the hydraulic cylinder form of plate or lifting device.The first pump with the displacement volume that can be adjusted is by hydraulic pressure Liquid is transported to the customer of the first hydraulic pressure from liquid case.Such regulation pump especially saves energy.First pump is by internal combustion engine, logical It is often by Diesel Driven.Internal combustion engine has fluid cooling device, and in the fluid cooling device, coolant is guided through The cooler of thin slice heat exchanger form, in order that by being cooled down to surrounding air heat extraction to coolant.Pass through internal combustion Machine carrys out the coolant that pumping is so cooled down, to cool down the internal combustion engine.In this case, coolant is heated again, and tightly Then it is back to cooler.
The surrounding air is conveyed by cooler by means of blast fan, thus particularly cooling is strengthened.At this In the situation of kind, blast fan is placed in rotary motion by the fan motor of hydraulic pressure.In addition, being also provided with the row that can be adjusted The second pump of volume is measured, this second pump can be transported to fan motor from liquid case by hydraulic fluid.Second pump also by internal combustion engine Lai Driving, is typically exactly to be driven in the identical rotating speed as the first pump.By adjusting the displacement volume of the second pump, So can infinitely adjust the rotating speed of the fan motor, will the coolant be cooled to optimal temperature.
The content of the invention
The task of the present invention is more to design to energy-conservation the mobile working machine.In this case, the mobile working machine Operation characteristic do not changed in the way of it can discover for user.In addition, the structure of this mobile working machine It is also extremely simple.
According to the present invention, this task is accomplished by a kind of mobile working machine.The mobile working machine has multiple The customer of the customer of first hydraulic pressure and one second hydraulic pressure, wherein, the customer of the first hydraulic pressure includes the mobile working machine Running driving device and/or task driven device, wherein, the first pump with the displacement volume that can be adjusted can be by hydraulic pressure Liquid is transported to the customer of the first hydraulic pressure from liquid case, wherein, hydraulic fluid can be transported to the second hydraulic pressure by the second pump from liquid case Customer, wherein, internal combustion engine is set, and the internal combustion engine carries out rotation driving with the first pump, the second pump and is connected, wherein, the second liquid The customer of pressure drives the blast fan that can be rotated for cooling down the internal combustion engine.According to the present invention, storage is provided for The accumulator of hydraulic fluid under pressure, wherein, customer of the accumulator so with the first hydraulic pressure is fluidly connected, i.e., During the hydraulic fluid flowed back from the customer of at least one the first hydraulic pressure can flow to accumulator, but not counter current, wherein, pressure accumulation Customer of the device so with the second hydraulic pressure is fluidly connected, i.e., hydraulic fluid can flow to the consumption of the second hydraulic pressure from accumulator Device.Accumulator is known as accumulator.According to the present invention, this memory can be loaded to return from the customer of the first hydraulic pressure The hydraulic fluid of stream.Even so, the customer of the first hydraulic pressure is still only driven by the first pump, and not by accumulator The hydraulic fluid of middle storage is driven, therefore, the operation characteristic that can be perceived for the user of mobile working machine Do not change.The hydraulic fluid of storage is only intended to drive the customer of second hydraulic pressure, and thus be accordingly used in cooling institute State internal combustion engine.As long as therefore doing some change to the operation characteristic that motor is cooled down, then user is imperceptible.
It should be noted that flowed back from the customer of the first hydraulic pressure, typically the hydraulic fluid with high volume flow but It is always only to flow back in short time.In contrast to this, fan drive device needs small but lasting volume flow.Pass through The accumulator, the different time responses of the volume flow can simply fit each other.
In addition it is also to be noted that the fan drive device has the energy regenerating ability of very little, therefore, if energy The customer for being confined to the first hydraulic pressure is reclaimed, then this is not defect.
Scheme and corrective measure are advantageously improved the invention further relates to some, is described below.
The second pump can so be set up so that it can run as motor, wherein, it has the row that can be adjusted Measure volume, wherein, it is so fluidly connected with accumulator, i.e., hydraulic fluid can from liquid case is flowed into accumulator, and And can flow on the contrary.This makes it possible to the hydraulic fluid stored with pressure in accumulator is driven into institute with being used for motor type State the second pump.Because the first pump, the second pump and internal combustion engine are each other among rotation driving connection, the second pump drives first Pump, and unload the internal combustion engine.Therefore the customer of the first hydraulic pressure is also driven in the following cases：I.e. in such cases The hydraulic fluid stored in accumulator is more than required for the customer of the second hydraulic pressure.It should be noted in this case It is that the energy regenerating of this form is applied to mobile working machine, particularly the first hydraulic pressure customer with not being perceived as simply Operation characteristic on.
At least the customer of the first hydraulic pressure can be configured to overcome and lift external applied load for gravity, or reduction external applied load. Such customer has extra high energy recovery potential.The hydraulic motor of capstan winch for driving crane can claim Act on the example of the customer of such first hydraulic pressure.In this case, the external applied load is suspended from crane Load on suspension hook.Different hydraulic cylinders on the cantilever of bucket dredger can be referred to as another example.In this case, it is described External applied load includes the power shovel with its content.
Can by it is lasting can regulation returns orifice and returning pressure claim to be switched to customer in the first hydraulic pressure with Among fluidly connecting between accumulator, wherein the returning pressure claims so to be connected with returning to orifice, i.e., it can By return orifice on pressure drop regulation to can be prespecified numerical value.The hydraulic fluid flowed back from the customer of the first hydraulic pressure Generally there is the pressure of the receiving material different from accumulator, it is therefore desirable to carry out pressure allotment.In this case, the hydraulic pressure The movement velocity of customer be to be changed according to the regulation for returning to orifice, wherein, memory pressure should not be for The travel speed of the customer of hydraulic pressure has an impact.This is also the connection claimed by proposed return orifice and returning pressure Come what is reached.
Fluidly connecting between the customer and accumulator of the first hydraulic pressure so can be connected with liquid case, that is, work as storage When pressure in depressor is more than the pressure for returning to the memory side on choke valve, hydraulic fluid is flowed into from the customer of the first hydraulic pressure Into liquid case.When the pressure in accumulator is too high, the hydraulic fluid flowed back from the customer of the first hydraulic pressure cannot flow into storage In device.Therefore must be at least indirectly flowing out in liquid case.Can so it contemplate in this case：The hydraulic fluid is direct Ground is by the customer of the second hydraulic pressure or by that can be flowed out to as the second pump of motor operation in liquid case.But also can The hydraulic fluid is exhausted directly in liquid case.Although making energy without lost using ground using second set of alternative scheme, But this scheme can be realized for this much easierly.
Brief description of the drawings
It is described in more details below by way of accompanying drawing for the present invention.Accompanying drawing is shown：
Fig. 1：According to the hydraulic circuit diagram of the portable working machine of the present invention.
Reference numerals list：
10 mobile working machines；
11 traveling drive motors；
12 wheels；
13 cylinders；
14 external loads；
The direction of 15 gravity；
16 liquid cases；
17 control devices；
20 valve modules；
21 consumption device assemblies；
22 pump line lines；
23 liquid case pipelines；
24 load pressure pipelines；
30 first pumps；
31 discharge pressure adjusters；
32 second pumps；
40 internal combustion engines；
41 fan driving motors；
42 blast fans；
43 coolers；
44 temperature sensors；
45 fan valves；
46 pipeloops；
47 cooling medium pumps；
50 accumulators；
51 memory valves；
52 memory pressures limit valve；
53 urgent feather valves（Notenleerungsventil）；
The spring of 54 urgent feather valves；
55 memory pressure sensors；
60 return to orifice（Rücklaufblende）；
61 returning pressures claim, in other words returning pressure balancer（Rücklaufdruckwaage）；
The spring that 62 returning pressures claim；
63 first regeneration valves；
64 memories are exported；
65 liquid cases are exported；
68 regeneration pressure sensors.
Embodiment
Fig. 1 shows a kind of hydraulic circuit diagram of the portable working machine 10 according to the present invention.The portable work Making machine 10 includes internal combustion engine 40, preferably diesel engine, and the internal combustion engine drives the with the rotating speed of identical rotating speed, i.e. bent axle One pump and the second pump 30,32.Hydraulic fluid is transported to the customer 11,13 of multiple first hydraulic pressure by the first pump 30 from liquid case 16.Stream Liquid measure to the customer 11,13 of single hydraulic pressure is controlled by means of valve module 20.In this case, to each first The customer 11,13 of hydraulic pressure arrange one point of the valve module 20 it is opening, can as whole installation consumption device assembly 21.Valve Component 20 includes pump line line 22, and the pump line line 22 runs through all consumption device assemblies 21, wherein, the first pump 30 and pump line line 22 Connection.In addition, valve module 20 also includes liquid case pipeline 23, the liquid case pipeline runs through all consumption device assemblies 21, wherein, liquid Case pipeline 23 is connected with liquid case 16.
One is set in each consumption device assembly 21（It is unshowned）Proportional reversing valve, the proportional reversing valve so with Pump line line and liquid case pipeline 22,23 are connected, i.e., it can control the motion of the customer 11,13 of attached troops to a unit hydraulic pressure, its way Be, it by means of can continue the choke block of regulation be by convection into the customer 11,13 of hydraulic pressure and customer 11 from hydraulic pressure, The 13 liquid streams returned are throttled.Preferably one is arranged to each proportional reversing valve（It is unshowned）Pressure claims （Druckwaage）, the pressure claim can by it is on choke block, preferably flow into when choke block on pressure drop regulation to one Kind can as defined in numerical value, so, the movement velocity of the customer 11,13 of the first hydraulic pressure only with the proportional reversing valve attached troops to a unit Regulation is relevant, and this regulation is by the electricity regulation of control device 17.
In addition, in valve module 20, the customer of all hydraulic pressure, as long as they are moved, their load pressure as This place couples, i.e., highest load pressure is on load pressure pipeline 24.Load pressure pipeline 24 and discharge pressure adjuster 31 connections, the discharge pressure adjuster is the displacement volume that can persistently adjust for so adjusting the first pump 30, i.e., the The discharge pressure of one pump 30 is higher by a pressure difference that can be prespecified than described crest pressure.For example in DE 10 A kind of possible valve module is illustrated in greater detail in 2010 009 704 A1.
The customer 11,13 of first hydraulic pressure, the i.e. traveling drive motor 11 of hydraulic pressure is connected with valve module 20, uses the row Sail drive motor to drive one or more wheel 12 of the mobile working machine 10, thus this mobile working machine being capable of phase For ground motion.In addition also set up hydraulic cylinder 13, using the hydraulic cylinder can with outside the lifting in the opposite direction of gravity 15 The load 14 in portion.When reducing the load 14 of the outside, hydraulic fluid is under pressure from the past backflow of cylinder 13.Usual this backflow Hydraulic fluid throttled by the proportional reversing valve attached troops to a unit, and return guide in liquid case pipeline 23.
In the present invention, this liquid stream is transported to the return orifice 60 that can constantly adjust, it is described to return to section Discharge orifice mouthful claims 61 to connect with returning pressure.In this case, this returns to orifice 60 and is preferably integral with what is attached troops to a unit In proportional reversing valve.Returning pressure claims 61 valve element to be pressed into by spring 62 in the position of unlatching.In spring side, liquid case side Or the pressure of memory side is connected with returning to orifice 60, wherein, the customer side of hydraulic pressure in the rear side of spring Pressure is connected with returning to orifice 60.So, return to orifice 60 and returning pressure claims 61 to together constitute a kind of two-way Road flow adjustment valve, so, the decrease speed of the customer of the first hydraulic pressure of the form of cylinder 13 are main only with returning to orifice 60 Regulation it is relevant.Claim the overall presure drop on 61 equivalent to the load pressure on hydraulic cylinder 11 in return orifice 60 and returning pressure The pressure difference between pressure in power and accumulator 50.Therefore, it can not be throttled total load pressure by returning to orifice 60, and It is the part that only throttles.Equivalent to remaining pressure energy to be stored in accumulator 50 in the form of the hydraulic fluid under pressure In.
For when the pressure that the load pressure is less than in accumulator 50, the first regeneration valve 63 is set, this First regeneration valve claims 61 to connect in liquid case side or memory side with returning pressure, wherein, regeneration valve 63 be selectively able to by The hydraulic fluid of backflow is directed in accumulator 50, or is introduced directly into liquid case 16.In addition regeneration pressure sensor is also set up 68, the regeneration pressure sensor is surveyed for the liquid case side on return orifice 60 or the regeneration pressure of memory side Amount.The regeneration valve 63 of regeneration pressure sensor 68 and first is connected with control device 17, and the control device includes what can be programmed Digital computer.For brevity, in fig. 1 the control device 17 with and with it be connected equipment, i.e. sense Device 55,44,68 and can be electrically operated valve 63,45,51,53 and the second pump 32 governor motion between all connection lines It is not shown.Memory pressure sensor 55 is connected with control device 17, and the memory pressure sensor measures the pressure accumulation Memory pressure in device 50.Control device 17 so adjusts the first regeneration valve 63 according to regeneration pressure and memory pressure, The hydraulic fluid flowed back is either fed directly in liquid case 16 by liquid case outlet 65 or flowed by memory outlet 64 Enter to accumulator 50.In this case also it is contemplated that pure hydraulically claim to realize for the first regeneration valve by means of pressure 63 control.In this way cost advantageously, but flexibility is few.
Accumulator 50 is connected by memory valve 51 with the memory outlet 64 of the first regeneration valve 63.Memory valve 51 is designed For the centre valve seat valve in other words of No leakage.In scram position, this memory valve 51 works as check-valves, wherein, it Only allow liquid stream to enter in accumulator 50, but do not allow opposite direction to flow.In open position, memory valve 51 can be It is through-flow in both direction.Memory valve 51 is pressed into scram position by spring, and accumulator can only be given in the scram position 50 loadings.By the electric control carried out by control device 17, the memory valve can be switched in open position, at this Accumulator 50 can either be loaded in individual open position, it can also unloaded.
For the sake of security, the accumulator limits valve 52 with memory pressure and urgent feather valve 53 is connected, these valves Can be by the capacity drain of accumulator 50 into liquid case 16.No leakage centre valve in other words seat valve form memory pressure limitation Memory pressure is limited in prespecified maximum by valve 52, so, and accumulator 50 would not rupture.Urgent feather valve 53 Centre valve seat valve in other words is designed as, and is pressed into by spring 54 in open position, wherein, by means of in the side of control device 17 The valve, can be switched in the position of shut-off by the electric control in face.When control device 17 breaks down or disconnected, generally The electric control signal of presence be not just on urgent feather valve 53, and such accumulator 50 is just automatically emptied.
In addition, the customer and the memory of the first regeneration valve 63 of the second hydraulic pressure of the form of fan driving motor 41 of hydraulic pressure Outlet 64 is connected.The fan driving motor 41 is preferably designed by the form of external tooth wheel motor, and therefore it has perseverance Fixed displacement volume.Fan driving motor 41 drives the blast fan 42 that can be rotated, and the blast fan guides air stream To at cooler 43.Cooler 43 is according to the form design of thin slice heat exchanger, and coolant flows through the thin slice heat exchanger, wherein, The air stream can cool down the coolant.Cooler 43 sets temperature sensor 44, and the temperature sensor measurement is cold But the temperature of the cooled coolant in the outlet of device 43.Cooler is connected by pipeloop 46 with internal combustion engine 40, so The coolant can be just conveyed by cooling medium pump 47 in the loop.In other words, hot coolant is flowed to from internal combustion engine 40 Cooler 43, and be cooled there.Cooled coolant flow back into internal combustion engine 40 again from cooler 43, and there It is heated again.So the used heat of internal combustion engine 40 is discharged in surrounding air by the coolant.
Second pump 32 is on the pressure side also connected with the memory joint 64 of the first regeneration valve.Under normal conditions, the second pump 32 aspirate hydraulic fluid from liquid case 16, and the hydraulic fluid is transported into the fan driving motor 41, to drive this fan to drive Dynamic motor.In this case, the first regeneration valve 63 is in a kind of position of the switch, the memory described in this position of the switch Joint 64 is locking.In this case, fans drive horse can be adjusted by adjusting the displacement volume of second pump 32 Up to 41 rotating speed.Fan valve 45 is fully opened in this case.
When regeneration pressure sensor 68 shows the pressure higher than memory pressure sensor 55, the first regeneration valve 63 Controlled device 17 is switched in the position on the left side, so, caused from the customer 11,13 of the first hydraulic pressure in pressure next time The hydraulic fluid of stream is loaded into accumulator 50.When described condition no longer in the presence of, then the first regeneration valve 63 be pulled to the right The position of the switch in.
When memory pressure is sufficiently high, the displacement volume of the second pump is set to zero, wherein, memory valve 51 is opened.This Sample liquid hydraulic fluid just can flow to fan driving motor 41 from accumulator 50.In this case, controlled with fan valve 45 described The rotating speed of fan driving motor 41.
When memory pressure is too high, so adjusts the displacement volume of second pump 32, i.e. this pump and be used as motor Carry out work.As a result, the capacity of part accumulator is flowed into liquid case 16 by the second pump 32.Pass through the drive produced by this measure Dynamic torque alleviates the load of the internal combustion engine 40, and therefore saves diesel oil.
When memory pressure is too low so that when can not drive fan driving motor 41, then there are a variety of feasible programs. Fan driving motor 41 singly can be driven by the second pump 32.Additionally can the volume flow of the second pump 32 be adjusted so Greatly, i.e., accumulator 50 is loaded into required degree again.But also can so contemplate, i.e., continue court with the second regeneration valve The suction side of second pump 32 is unloaded to accumulator 50.It must be maked decision according to volume flow between the feasible program, its In, expectantly the volume flow flows back from the customer 11,13 of the first hydraulic pressure, wherein, strive for best possible for by interior Mechanical driving energy that combustion engine is provided makes full use of.

Claims (5)

1. mobile working machine（10）, the customer with multiple first hydraulic pressure（11、13）With the customer of one second hydraulic pressure（41）, Wherein, the customer of the first hydraulic pressure（11、13）Including the mobile working machine（10）Running driving device and/or task driven Device, wherein, the first pump with the displacement volume that can be adjusted（30）Can be by hydraulic fluid from liquid case（16）It is transported to first The customer of hydraulic pressure（11、13）, wherein, the second pump（32）Can be by hydraulic fluid from liquid case（16）It is transported to the consumption of the second hydraulic pressure Device（41）, wherein, internal combustion engine is set（40）, the internal combustion engine and the first pump（30）, the second pump（32）Rotation driving connection is carried out, Wherein, the customer of the second hydraulic pressure（41）Drive for cooling down the internal combustion engine（40）The blast fan that can be rotated（42）, Characterized in that, being provided for the accumulator for the hydraulic fluid that storage is under pressure（50）, wherein, accumulator（50）So with The customer of first hydraulic pressure（11、13）Fluidly connected, i.e. the customer from least one the first hydraulic pressure（13）Middle backflow Hydraulic fluid can flow to accumulator（50）In, but not counter current, wherein, accumulator（50）So with the consumption of the second hydraulic pressure Device（41）Fluidly connected, i.e., hydraulic fluid can be from accumulator（50）Flow to the customer of the second hydraulic pressure.
2. according to the mobile working machine described in claim 1, it is characterised in that the second pump arranged so（32）, i.e., it also can It is enough as motor operation, wherein, it has the displacement volume that can be adjusted, wherein, it so with accumulator（50）Flowed Body is connected, i.e., hydraulic fluid can be from liquid case（16）It is flowed into accumulator（50）In, and being capable of counter current.
3. according to the mobile working machine described in any one of preceding claims, it is characterised in that by least one the first liquid The customer of pressure is configured to overcome lifts external applied load for gravity, or reduction external applied load.
4. according to the mobile working machine described in claim 1 or 2, it is characterised in that by the return throttle orifice that can persistently adjust Mouthful（60）With returning pressure scale（61）It is switched to the customer of the first hydraulic pressure（11、13）And accumulator（50）Between fluidly connect Among, wherein, returning pressure scale（61）So with returning to orifice（60）Connection, i.e., it can will return to orifice （60）On pressure drop regulation to can as defined in numerical value.
5. according to the mobile working machine described in claim 4, it is characterised in that in the customer of the first hydraulic pressure（11、13）And storage Depressor（50）Between fluidly connect and be so connected with liquid case, i.e., when in the accumulator（50）In pressure be more than In the return orifice（60）On memory side pressure when, hydraulic fluid by the first hydraulic pressure customer（11、13）Stream Enter into liquid case.
CN201310051585.5A 2012-02-18 2013-02-17 Mobile working machine with the energy recycle device for drive motor cooler Expired - Fee Related CN103256260B (en)

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