CN108488120A - A kind of distributed direct drive excavator hydraulic system of servo motor driving single argument pump - Google Patents
A kind of distributed direct drive excavator hydraulic system of servo motor driving single argument pump Download PDFInfo
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- CN108488120A CN108488120A CN201810343149.8A CN201810343149A CN108488120A CN 108488120 A CN108488120 A CN 108488120A CN 201810343149 A CN201810343149 A CN 201810343149A CN 108488120 A CN108488120 A CN 108488120A
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 39
- 239000012530 fluid Substances 0.000 abstract description 23
- 238000005381 potential energy Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005183 dynamical system Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- 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
-
- 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
-
- 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
- F15B21/08—Servomotor systems incorporating electrically operated 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
- 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
- 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
- F15B2211/20515—Electric 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
- F15B2211/2053—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
- F15B2211/20576—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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The present invention provides a kind of distributed direct drive excavator hydraulic system of servo motor driving single argument pump, the two-way variable displacement pump and servo motor are directly connected to, independently to drive the hydraulic cylinder, the flow equilibrium of hydraulic cylinder is realized by two check valves, it is driven simultaneously using servo motor, so that replacing the distributed intelligence of fluid pressure line passing power to control with conducting wire, present system major loop is very short and does not have restricting element, therefore the pressure loss is few, calorific value is few, cooling device is not needed, the restriction loss and spill losses of system are avoided simultaneously, system effectiveness is higher, and the present invention is in the case of over-running load, can also be that electric energy is stored into the supply unit by the potential energy for loading feedback, it is reused, the energy is saved.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, especially a kind of distributed direct of servo motor driving single argument pump, which drives, to be excavated
Machine hydraulic system.
Background technology
Hydraulic crawler excavator is as most common machinery in engineering machinery, and there are oil consumption height, discharge is poor, capacity usage ratio is low
The shortcomings of.It is on the rise under situation in energy shortage and problem of environmental pollution, how to realize the energy saving and emission reduction of excavator, it is more next
More paid attention to by people, becomes the hot spot studied at present.
Current excavator still uses the drive system of Engine-variable Pump System-multi-way valve-actuator.Since energy conservation and environmental protection is wanted
It asks, part research substitutes engine using common electric machine, but system effectiveness is still to be improved.With the phase of AC servomotor
After succeeding in developing, servo motor-quantitative hydraulic pump/motor-hydraulic valve-actuator system has carried out engineer application, such as injection molding machine
Deng.These hydraulic system power-economizing methods play an important role in terms of improving efficiency.
Patent of invention：A kind of all-electric servo excavator (application number：201110453095.9), it is electronic using AC servo
The electro-mechanical transmission and servo-drive system that machine is combined with ball-screw, it the advantages of be that electric energy is directly transformed to mechanical energy, system letter
Unit consumption can less, occupy little space.But when requiring low speed high torque, the operating mode contributed greatly, this electro-mechanical transmission and servo-drive system
To add retarder could complete drive task, make complex system.Even if adding retarder sometimes cannot still meet the requirements, such as
In high-power transmission, best transmission scheme is exactly to select electro-hydraulic drive system or electrohydraulic servo system.
Patent of invention：Complete electrically driven (operated) hydraulic crawler excavator dynamical system (application number：201610406357.9), pass through control
The rotating speed size and rotary speed direction of each servo motor, to come control connect with each servo motor two-way quantitative pump it is defeated
The size and Orientation of outflow is finally completed the speed control to each hydraulic actuator.1. the system uses servo motor
One two-way quantitative of driving pumps to control symmetrical hydraulic cylinder, and the effective area of hydraulic cylinder piston side reduces so that when piston stretches out
High power output amplitude reduces.2. when system pressure is higher, drive the torque needed for constant displacement pump larger, to motor performance requirement
Height, such as require torque, power bracket wide, and also the system can not recycle the energy of over-running load feedback.
Invention content
The technical problem to be solved in the present invention is to provide a kind of distributed direct drive digging of servo motor driving single argument pump
Machine hydraulic system is dug, with electric drive, realizes that conducting wire replaces the distributed intelligence of fluid pressure line passing power to control, avoids throttling
Loss, while reaching the broader range of speeds and obtaining larger torque output, the performance requirement of servo motor is reduced, it is mobile
With it is flexible for installation, reached the effective integration of excavator energy-saving and emission-reduction and performance boost.
The invention is realized in this way：A kind of distributed direct drive excavator hydraulic pressure system of servo motor driving single argument pump
System, including a controller, a supply unit and an at least hydraulic module；The hydraulic module includes a hydraulic cylinder, one first liquid
Control check valve, one second hydraulic control one-way valve, a two-way variable displacement pump, a servo motor, a frequency converter and an accumulator；The liquid
Cylinder pressure includes cylinder body, piston and piston rod, and one end of the piston rod is fixedly connected on the piston, and the piston air-tightness can
It is slidably connected in the cylinder body, and the cylinder interior is divided into first chamber and second chamber by the piston；Described
One hydraulic control one-way valve includes first entrance, first outlet and the first hydraulic control control mouth, and second hydraulic control one-way valve includes second
Entrance, second outlet and the second hydraulic control control mouth；
The frequency converter and the controller are electrically connected in the supply unit, and the frequency converter is electrically connected to described
Servo motor, the output end of the servo motor are connected to the driving end of the two-way variable displacement pump, and the one of the two-way variable displacement pump
Port is connect with the first outlet and the second hydraulic control control mouth air-tightness simultaneously, and is hermetic connected to described first
Chamber；The another port of the two-way variable displacement pump connects with the second outlet and the first hydraulic control control mouth air-tightness simultaneously
It connects, and is hermetic connected to the second chamber；It is airtight after the first entrance is in parallel with the second entrance air-tightness
It is connected to the accumulator to property；The two-way variable displacement pump, the frequency converter are communicatively coupled to the controller respectively.
Further, further include two two-position two-way solenoid valves, the Single port of the two-way variable displacement pump is simultaneously with described the
One outlet and the second hydraulic control control mouth hermetic connect, and gas after a two-position two-way solenoid valve of hermetic connecting
It is connected to the first chamber to close property；The another port of the two-way variable displacement pump simultaneously with the second outlet and described first
Hydraulic control control mouth hermetic connects, then is hermetic connected to institute after another two-position two-way solenoid valve of hermetic connecting
Second chamber is stated, two two-position two-way solenoid valves are communicatively coupled to the controller respectively.
Further, there are three the hydraulic modules.
The invention has the advantages that：A kind of distributed direct of servo motor driving single argument pump of the present invention drives excavator liquid
Pressure system, the two-way variable displacement pump and servo motor are directly connected to, and independently to drive the hydraulic cylinder, pass through two fluid-control one-ways
Valve is driven to realize the flow equilibrium of hydraulic cylinder using servo motor so that replaces fluid pressure line passing power with conducting wire
Distributed intelligence control, this system major loop is very short and does not have restricting element, therefore the pressure loss is few, calorific value is few, is not required to
Cooling device is wanted, while avoiding the restriction loss and spill losses of system, system effectiveness is higher, and the present invention is negative in negative value
In the case of load, it can also be that electric energy is stored into the supply unit by the potential energy for loading feedback, be reused,
The energy is saved.
Description of the drawings
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is that a kind of servo motor of the present invention drives the distributed direct of single argument pump to drive excavator hydraulic system
Schematic diagram.
Fig. 2 is that a kind of servo motor of the present invention drives the distributed direct of single argument pump to drive excavator hydraulic system
The schematic diagram of operating mode 1.
Fig. 3 is that a kind of servo motor of the present invention drives the distributed direct of single argument pump to drive excavator hydraulic system
The schematic diagram of operating mode 2.
Fig. 4 is that a kind of servo motor of the present invention drives the distributed direct of single argument pump to drive excavator hydraulic system
The schematic diagram of operating mode 3.
Fig. 5 is that a kind of servo motor of the present invention drives the distributed direct of single argument pump to drive excavator hydraulic system
The schematic diagram of operating mode 4.
Fig. 6 is the speed control principle figure of servo motor of the present invention.
Fig. 7 is that a kind of servo motor of the present invention drives the distributed direct of single argument pump to drive excavator hydraulic system
Effect diagram.
In figure：1, controller；2, hydraulic module；21, hydraulic cylinder；211, cylinder body；2111, first chamber；2112, the second chamber
Room；212, piston；213, piston rod；22, two-position two-way solenoid valve；23, the first hydraulic control one-way valve；231, first entrance；232、
First outlet；233, the first hydraulic control control mouth；24, the second hydraulic control one-way valve；241, second entrance；242, second outlet；243、
Second hydraulic control control mouth；25, two-way variable displacement pump；26, servo motor；27, frequency converter；28, accumulator；3, scraper bowl；4, dipper；5、
Swing arm；A, servo motor rated power.
Specific implementation mode
Refering to Figure 1, a kind of distributed direct of servo motor driving single argument pump of the present invention drives excavator hydraulic pressure system
System, including a controller 1, a supply unit (not shown) and an at least hydraulic module 2；The hydraulic module 2 includes a hydraulic pressure
Cylinder 21, one first hydraulic control one-way valve 23, one second hydraulic control one-way valve 24, a two-way variable displacement pump 25, a servo motor 26, a frequency conversion
Device 27 and an accumulator 28；The hydraulic cylinder 21 includes cylinder body 211, piston 212 and piston rod 213, the piston rod 213
One end is fixedly connected on the piston 212, and 212 air-tightness of the piston is slidably connected in the cylinder body 211, and described
Piston 212 will be divided into first chamber 2111 and second chamber 2112 inside the cylinder body 211；First hydraulic control one-way valve 23 wraps
First entrance 231, first outlet 232 and the first hydraulic control control mouth 233 are included, second hydraulic control one-way valve 24 includes second entrance
241, second outlet 242 and the second hydraulic control control mouth 243；
The frequency converter 27 and the controller 1 are electrically connected in the supply unit (not shown), the frequency converter
27 are electrically connected to the servo motor 26, and the output end of the servo motor 26 is connected to the driving of the two-way variable displacement pump 25
End, the Single port of the two-way variable displacement pump 25 simultaneously with the first outlet 232 and 243 air-tightness of the second hydraulic control control mouth
Connection, and hermetic it is connected to the first chamber 2111；The another port of the two-way variable displacement pump 25 is simultaneously with described the
Two 242 air-tightness of outlet and the first hydraulic control control mouth 233 hermetic connect, and are hermetic connected to second chamber
Room 2112；It is hermetic connected to the accumulator after the first entrance 231 is in parallel with 241 air-tightness of the second entrance
28；The two-way variable displacement pump 25, the frequency converter 27 are communicatively coupled to the controller 1 respectively.The piston rod 213 is connected to
Load, for driving loaded work piece, the controller 1, into row data communication, to be watched to described according to load variation with frequency converter 27
It takes motor 26 and carries out frequency control, as shown in fig. 6, debud mode is low load high speed, middle load speed approaches its rated power, heavy duty
Its rotating speed is limited, at the same time the controller 1 and the two-way variable displacement pump 25 communicate to connect so that the controller 1 controls
The two-way variable displacement pump 25 dynamically adjusts the discharge capacity of the two-way variable displacement pump 25, is optimal power match；The frequency converter 27
Output corresponding frequencies control the rotating speed size and rotary speed direction of the servo motor 26 with voltage, to described two-way to control
The size and Orientation of the output flow of variable pump 25 is finally completed the speed control to the piston rod 213.
Compared to conventional hydraulic, since the present invention is closed system, with oil less, required volume of fuel tank very little, can be institute
State servo motor 26, the oil cylinder 21, the two-way variable displacement pump 25, the accumulator 28, the frequency converter 27, first liquid
It is integral to control check valve 23,24 groups of second hydraulic control one-way valve, makes hydraulic pressure packet form, it is easy for installation, it is small.
It is driven using the servo motor 26 so that when the controller 1 is connected to vehicle control syetem, connected using conducting wire
It connects, is controlled instead of the distributed intelligence of original fluid pressure line passing power with conducting wire, this system major loop is very short and does not save
Fluid element, therefore the pressure loss is few, calorific value is few, does not need cooling device.
The servo motor 26 replaces two-way variable displacement pump 25 described in engine driving, and system effectiveness greatly improves, and realizes section
Energy, emission reduction and noise reduction.It works after legacy system booting, executing agency does not work and do not shut down yet, and motor and oil pump are run as usual, consumption
It can be big.When the hydraulic cylinder 21 of the present invention needs work, the servo motor 26 operates, when the hydraulic cylinder 21 does not work,
The servo motor 26 stalls, and realizes driving on demand, saves electric energy.
Because of the presence of the piston rod 213, the first chamber 2111 and second chamber 2112 are unsymmetric structure, are made
The maximum volume for obtaining the first chamber 2111 is more than the maximum volume of the second chamber 2112, and the hydraulic cylinder 21 is non-right
Claim hydraulic cylinder, when fluid is transported to the second chamber 2112 from the first chamber 2111 so that the first chamber
2111 oil run flows into oil mass more than the second chamber 2112, and it is extra that fluid has, and needs to store extra fluid
Into the accumulator 28, and when fluid is transported to the first chamber 2111 from the second chamber 2112, need described
Fluid in accumulator 28 adds in the first chamber 2111, and first hydraulic control one-way valve 23 and second hydraulic control
Check valve 24 is exactly for realizing the flow equilibrium between the first chamber 2111 and second chamber 2112, because of fluid-control one-way
Valve can be achieved on bidirectional conduction by hydraulic control control mouth, therefore first hydraulic control one-way valve 23 and second has been previously set
The pressure value of hydraulic control one-way valve 24 is equal, described when the pressure of the first chamber 2111 exceeds the pressure value being previously set
Second hydraulic control control mouth 243 automatically opens, and second hydraulic control one-way valve 24 is connected, and flow-rate adjustment is carried out, to realize
State the balance of 2112 flow of first chamber 2111 and second chamber.With should the second chamber 2112 pressure beyond setting in advance
When fixed pressure value, the first hydraulic control control mouth 233 automatically opens, and first hydraulic control one-way valve 23 is connected, is flowed
Amount is adjusted, to realize the balance of 2112 flow of the first chamber 2111 and second chamber.
The operation principle of the present invention, there are following four operating modes：
It please refers to shown in Fig. 2 to Fig. 5, F is the external force that load is applied to the piston rod 213 in figure, and v is the piston rod
213 speed of service；The direction of hydraulic pressure force direction and external force F are opposite；The piston rod 213 is connected to the load of excavator, digs
The load of pick machine will produce potential energy during the work time；The two-way variable displacement pump 25 can both be used as pump, can also be used as motor
It generates electricity；
Positive value load：Hydraulic pressure force direction is identical as the direction of v, 213 stretchings of the piston rod/retraction, at this time the power supply
Servo motor 26 described in device output electrical energy drive (not shown) drives the two-way variable displacement pump 25, the piston rod 213 to export
Energy is to load；
Over-running load：The direction of hydraulic pressure force direction and v are on the contrary, 213 stretchings of the piston rod/retraction, load feedback energy
To the piston rod 21, so that the two-way variable displacement pump 25 is in generating state by hydraulic circuit, store energy to institute
Supply unit (not shown) is stated, is recycled.
Operating mode 1, please refers to shown in Fig. 2：In the case of for over-running load, the piston rod 213 is retracted, the piston rod
213 by the pressure loaded, and F is pressure at this time so that 2111 pressure of the first chamber is higher, and the potential energy of load is passed to
The hydraulic cylinder 21, and then drive the two-way variable displacement pump 25 to generate electricity by hydraulic circuit, by power storage to the electricity
It in source device (not shown), is recycled, has saved energy, the flow direction of the fluid in the hydraulic module 2 is at this time：Institute
The fluid stated in first chamber 2111 is sent to the second chamber 2112 by the two-way variable displacement pump defeated 25, at this time due to described
The pressure of first chamber 2111 is more than the pressure of the second chamber 2112 so that the second hydraulic control control mouth 243 is opened, will
Second hydraulic control one-way valve 24 is connected, and extra fluid is flowed into from second hydraulic control one-way valve 24 in the accumulator 28,
To realize the flow equilibrium in the first chamber 2111 and second chamber 2112.
Operating mode 2, please refers to shown in Fig. 3：In the case of being loaded for positive value, the piston rod 213 stretches out, the piston rod
213 by the pressure loaded, and F is pressure at this time so that 2111 pressure of the first chamber is higher, and the controller 1 controls institute
It states frequency converter 27 and then controls the servo motor 26 and drive the two-way variable displacement pump 25, by the fluid of the second chamber 2112
It is transported to the first chamber 2111 by the two-way variable displacement pump 25, the fluid also needed at this time in the accumulator 28 carries out
Supplement, since the pressure of the first chamber 2111 is more than the pressure of the second chamber 2112 so that the second hydraulic control control
Donsole 243 is opened, and second hydraulic control one-way valve 24 is connected so that the fluid in accumulator also passes through the second hydraulic control list
It is flowed to valve 24 in the fluid that the second chamber 2112 flows out, first chamber is transported to by the two-way variable displacement pump 25
Room 2111, to realize the flow equilibrium in the first chamber 2111 and second chamber 2112.
Operating mode 3, please refers to shown in Fig. 4：In the case of for over-running load, the piston rod 213 stretches out, the piston rod
213 by the pulling force loaded, and F is pulling force at this time so that 2112 pressure of the second chamber is higher, and the controller 1 controls institute
It states frequency converter 27 and then controls the servo motor 26 and drive the two-way variable displacement pump 25, by the fluid of the second chamber 2112
It is transported to the first chamber 2111 by the two-way variable displacement pump 25, the fluid also needed at this time in the accumulator 28 carries out
Supplement, since the pressure of the second chamber 2112 is more than the pressure of the first chamber 2111 so that the first hydraulic control control
Donsole 233 is opened, and first hydraulic control one-way valve 23 is connected so that the fluid in the accumulator 28 also passes through described first
Hydraulic control one-way valve 23 flows in the first chamber 2111, to realize in the first chamber 2111 and second chamber 2112
Flow equilibrium.The potential energy of load is passed into the piston rod 213 simultaneously, and then the bidirectional variable is driven by hydraulic circuit
Pump 25 generates electricity, and by power storage to the supply unit (not shown), is recycled, has saved energy.
Operating mode 4, please refers to shown in Fig. 5：In the case of being loaded for positive value, the piston rod 213 is retracted, the piston rod
213 by the pulling force loaded, and F is pulling force at this time, and the pressure of the second chamber 2112 is more than the pressure of the first chamber 2111
Power, at this time the flow direction of the fluid in the hydraulic module 2 be：Fluid in the first chamber 2111 passes through the bidirectional variable
Pump 25 is transported to the second chamber 2112, at this time since the pressure of the second chamber 2112 is more than the first chamber 2111
Pressure so that the first hydraulic control control mouth 233 is opened, and first hydraulic control one-way valve 23 is connected, by first chamber
The extra fluid in room 2111 is flowed into from first hydraulic control one-way valve 23 in the accumulator 28, to realize the first chamber
2111 and second chamber 2112 in flow equilibrium.
As shown in Figure 1, further include two two-position two-way solenoid valves 22 in a specific embodiment preferably, it is described two-way
The Single port of variable pump 25 is connect with the first outlet gas 232 and 243 air-tightness of the second hydraulic control control mouth simultaneously, and gas
It connects to close property and is hermetic connected to the first chamber 2111 after a two-position two-way solenoid valve 22；The bidirectional variable
The another port of pump 25 is hermetic connect with the second outlet 242 and the first hydraulic control control mouth 233 simultaneously, and airtight
Hermetic it is connected to property the second chamber 2112 after another two-position two-way solenoid valve 22 of connecting, two described two two
Three-way electromagnetic valve 22 is communicatively coupled to the controller 1 respectively.Two two-position two-way solenoid valves 22, are mainly locked out the liquid
Cylinder pressure 21 avoids sliding caused by the leakage of the two-way variable displacement pump 25.
As shown in Figure 1 and Figure 7, in a specific embodiment preferably, there are three the hydraulic modules 2.Three liquid
Die block 2 connects one to one in the swing arm 5, dipper 4, scraper bowl 3 of excavator, realizes that three independently drives, facilitates control.
Although specific embodiments of the present invention have been described above, those familiar with the art should manage
Solution, we are merely exemplary described specific embodiment, rather than for the restriction to the scope of the present invention, it is familiar with this
The technical staff in field modification and variation equivalent made by the spirit according to the present invention, should all cover the present invention's
In scope of the claimed protection.
Claims (3)
1. a kind of distributed direct of servo motor driving single argument pump drives excavator hydraulic system, it is characterised in that：Including a control
Device, a supply unit and an at least hydraulic module processed；The hydraulic module includes a hydraulic cylinder, one first hydraulic control one-way valve, one
Second hydraulic control one-way valve, a two-way variable displacement pump, a servo motor, a frequency converter and an accumulator；The hydraulic cylinder includes cylinder
One end of body, piston and piston rod, the piston rod is fixedly connected on the piston, and the piston air-tightness is slidably connected
In in the cylinder body, and the cylinder interior is divided into first chamber and second chamber by the piston；First fluid-control one-way
Valve includes first entrance, first outlet and the first hydraulic control control mouth, and second hydraulic control one-way valve includes second entrance, second goes out
Mouth and the second hydraulic control control mouth；
The frequency converter and the controller are electrically connected in the supply unit, and the frequency converter is electrically connected to the servo
Motor, the output end of the servo motor are mechanically connected to the driving end of the two-way variable displacement pump, and the one of the two-way variable displacement pump
It is hermetic connected to again with the second hydraulic control control mouth air-tightness series connection after port is connect with the first outlet air-tightness
The first chamber；After the another port of the two-way variable displacement pump is connect with the second outlet air-tightness and first hydraulic control
The series connection of control mouth air-tightness is hermetic connected to the second chamber again；The first entrance and the second entrance air-tightness
Parallel connection after be hermetic connected to the accumulator；The two-way variable displacement pump, the frequency converter are communicatively coupled to described respectively
Controller.
2. a kind of distributed direct of servo motor driving single argument pump according to claim 1 drives excavator hydraulic system,
It is characterized in that：Further include two two-position two-way solenoid valves, the Single port of the two-way variable displacement pump simultaneously with the first outlet
And the second hydraulic control control mouth hermetic connects, and after one two-position two-way solenoid valve of series connection of air-tightness hermetic
It is connected to the first chamber；The another port of the two-way variable displacement pump simultaneously with the second outlet and the first hydraulic control control
Donsole hermetic connects, and is hermetic connected to described second after another two-position two-way solenoid valve of series connection of air-tightness
Chamber, two two-position two-way solenoid valves are communicatively coupled to the controller respectively.
3. driving excavator according to a kind of distributed direct of servo motor driving single argument pump of claims 1 or 2 any one of them
Hydraulic system, it is characterised in that：There are three the hydraulic modules.
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| CN201810343149.8A CN108488120B (en) | 2018-04-17 | 2018-04-17 | Hydraulic system of distributed direct-drive excavator with single variable pump driven by servo motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032138A (en) * | 2020-07-30 | 2020-12-04 | 德州联合石油科技股份有限公司 | Hydraulic injection pump reversing method and system |
| CN113309158A (en) * | 2021-06-22 | 2021-08-27 | 山东临工工程机械有限公司 | Quantitative control system and method for quantitative system of electric excavator |
| CN114482181A (en) * | 2021-12-10 | 2022-05-13 | 盐城吉研智能科技有限公司 | Excavation track following automatic control system and method of electric excavation robot |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550830A (en) * | 2009-05-18 | 2009-10-07 | 浙江大学 | Energy-efficient shield cutterhead closed loop hydraulic control system adopting ganged accumulators |
| CN204985169U (en) * | 2015-09-14 | 2016-01-20 | 佛山市南海区广工大数控装备协同创新研究院 | Energy -conserving comprehensive experimental platform device of hydraulic pressure |
| US20160102685A1 (en) * | 2014-10-10 | 2016-04-14 | MEA Inc. | Self-contained energy efficient hydraulic actuator system |
| CN105782149A (en) * | 2016-05-09 | 2016-07-20 | 沈阳重机重矿机械设备制造有限公司 | Hydraulic press pump controlled hydraulic system with renewable power generation |
| CN208330872U (en) * | 2018-04-17 | 2019-01-04 | 福建工程学院 | A kind of distributed direct drive excavator hydraulic system of servo motor driving single argument pump |
-
2018
- 2018-04-17 CN CN201810343149.8A patent/CN108488120B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550830A (en) * | 2009-05-18 | 2009-10-07 | 浙江大学 | Energy-efficient shield cutterhead closed loop hydraulic control system adopting ganged accumulators |
| US20160102685A1 (en) * | 2014-10-10 | 2016-04-14 | MEA Inc. | Self-contained energy efficient hydraulic actuator system |
| CN204985169U (en) * | 2015-09-14 | 2016-01-20 | 佛山市南海区广工大数控装备协同创新研究院 | Energy -conserving comprehensive experimental platform device of hydraulic pressure |
| CN105782149A (en) * | 2016-05-09 | 2016-07-20 | 沈阳重机重矿机械设备制造有限公司 | Hydraulic press pump controlled hydraulic system with renewable power generation |
| CN208330872U (en) * | 2018-04-17 | 2019-01-04 | 福建工程学院 | A kind of distributed direct drive excavator hydraulic system of servo motor driving single argument pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032138A (en) * | 2020-07-30 | 2020-12-04 | 德州联合石油科技股份有限公司 | Hydraulic injection pump reversing method and system |
| CN112032138B (en) * | 2020-07-30 | 2021-08-17 | 德州联合石油科技股份有限公司 | Hydraulic injection pump reversing method and system |
| CN113309158A (en) * | 2021-06-22 | 2021-08-27 | 山东临工工程机械有限公司 | Quantitative control system and method for quantitative system of electric excavator |
| CN114482181A (en) * | 2021-12-10 | 2022-05-13 | 盐城吉研智能科技有限公司 | Excavation track following automatic control system and method of electric excavation robot |
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| CN108488120B (en) | 2023-11-17 |
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