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CN108350914A - Driven by Hydraulic Cylinder device - Google Patents

Driven by Hydraulic Cylinder device Download PDF

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Publication number
CN108350914A
CN108350914A CN201680056289.6A CN201680056289A CN108350914A CN 108350914 A CN108350914 A CN 108350914A CN 201680056289 A CN201680056289 A CN 201680056289A CN 108350914 A CN108350914 A CN 108350914A
Authority
CN
China
Prior art keywords
aforementioned
hydraulic cylinder
dynamotor
hydraulic
variable capacity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201680056289.6A
Other languages
Chinese (zh)
Inventor
本间义和
山口雅仁
渡边绅刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Rexroth Corp
Original Assignee
Bosch Rexroth Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bosch Rexroth Corp filed Critical Bosch Rexroth Corp
Publication of CN108350914A publication Critical patent/CN108350914A/en
Pending 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • 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
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2095—Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • E02F9/2235—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • 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
    • 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
    • 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
    • F15B2211/2053—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
    • F15B2211/27—Directional control by means of the pressure source
    • 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
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply 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
    • F15B2211/60—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
    • F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6652—Control of the pressure source, e.g. control of the swash plate angle
    • 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
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting 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
    • F15B2211/76—Control of force or torque of the output member
    • F15B2211/761—Control of a negative load, i.e. of a load generating hydraulic energy
    • 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
    • F15B2211/785—Compensation of the difference in flow rate in closed fluid circuits using differential actuators
    • 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)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The present invention relates to a kind of Driven by Hydraulic Cylinder device, which has：Hydraulic cylinder has the piston rod activated to activateding equipment；Dynamotor is functioned as the motor by the work about electric power outside device, and is functioned as the generator for being externally supplied electric power to device；1st variable capacity pump motor, it is attached on aforementioned dynamotor, as to the lid lateral pressure room of aforementioned hydraulic cylinder supply hydraulic pressure hydraulic pump function, and by the hydraulic pressure supplied from aforementioned cover lateral pressure room and the power plant as aforementioned dynamotor functions；2nd variable capacity pump motor, it is attached on aforementioned dynamotor, as to the bar side balancing gate pit of aforementioned hydraulic cylinder supply hydraulic pressure hydraulic pump function, and by the hydraulic pressure supplied from aforementioned bar side balancing gate pit and the power plant as aforementioned dynamotor functions.

Description

Driven by Hydraulic Cylinder device
Technical field
The present invention relates to the Driven by Hydraulic Cylinder devices for being activated to activateding equipment.
Background technology
As the Driven by Hydraulic Cylinder device for being activated to activateding equipment, have on one side to the hydraulic pressure for having piston rod The bar side balancing gate pit and lid lateral pressure room of cylinder are supplied respectively to the structure that hydraulic pressure is activated to activateding equipment on one side.For example, setting The crane arm of the implements such as standby or discharge mechanism carries out rise and fall using such Driven by Hydraulic Cylinder device.In implement In, for example, crane arm relative to crane arm supporting part by pivot suspension in a rolling manner, be equipped with shovel in the front end side of the crane arm The operations parts such as bucket are installed with weight equalizer in rear end side, and operation part and weight equalizer can be branch with crane arm supporting part Point mutually moves up and down.In such implement, the rise and fall of crane arm is by Driven by Hydraulic Cylinder.
When crane arm rises, hydraulic cylinder works to bar direction of advance.At this point, by controlling the lid lateral pressure to hydraulic cylinder The discharge rate of the supply amount of the working oil of room and working oil from bar side balancing gate pit, controls the rate of climb of crane arm.Another party Face, when crane arm declines, hydraulic cylinder works to bar direction of retreat.At this point, by controlling to the bar side balancing gate pit of hydraulic cylinder The discharge rate of the supply amount of working oil and working oil from lid lateral pressure room, controls the decrease speed of crane arm.
In non-patent literature 1, an example for the hydraulic circuit applied in such Driven by Hydraulic Cylinder device is disclosed.It should Hydraulic circuit has：The hydraulic pump that working oil is discharged；And multiple valves, by the working oil discharged by hydraulic pump to hydraulic cylinder Bar side balancing gate pit or the supply of lid lateral pressure room are discharged from bar side balancing gate pit or lid lateral pressure room.
Non-patent literature 1：Fujikoshi Research Group, " your inquisitive hydraulic pressure/basis piece ", the 8th edition, day This machinery scholar Co., Ltd. publishes, on September 20th, 1989, page 315.
But in Driven by Hydraulic Cylinder device as described above, since the working oil being discharged to tank is likely to become high temperature, institute To there is the Driven by Hydraulic Cylinder device for having oil cooler in the discharge oil circuit for sending working oil back to tank.Fig. 5 indicates tool The example of the hydraulic circuit 200 of standby oil cooler 230.The hydraulic circuit 200 has and has：Hydraulic cylinder 240, can be in cylinder barrel The piston rod 243 of advancing and retreating movement in 241；By the hydraulic pump 220 that motor 250 drives and discharges working oil；With will be discharged The direction switch valve 260 that is guided to bar side balancing gate pit 245 or lid lateral pressure room 247 of working oil.
In the 1st control oil circuit 224 for being connected to direction switch valve 260 with lid lateral pressure room 247 and by direction switch valve 260 In the 2nd control oil circuit 226 being connected to bar side balancing gate pit 245, have respectively flow control valve 270,280 and check valve 272, 282.In addition, will have oil in the discharge oil circuit 228 guided to tank 234 via 260 discharged working oil of direction switch valve Cooler 230.Has safety valve 232 between the waste side oil circuit 222 and discharge oil circuit 228 of hydraulic pump 220.
In the Driven by Hydraulic Cylinder device, in the case where making hydraulic cylinder 240 work to bar direction of advance, cut by direction Changing valve 260 makes the waste side oil circuit 222 of hydraulic pump 220 be connected to the 1st control oil circuit 224, makes the 2nd control oil circuit 226 and discharge Oil circuit 228 is connected to.Working oil is supplied by check valve 272 to lid lateral pressure room 247 as a result, and in bar side balancing gate pit 245 Working oil on one side by flow control valve 280 carry out flow control, on one side pass through the 2nd control oil circuit 226 and discharge 228 quilt of oil circuit Send tank 234 back to.
In addition, in the case where making hydraulic cylinder 240 work to bar direction of retreat, hydraulic pump 220 is made by direction switch valve 260 Waste side oil circuit 222 with the 2nd control oil circuit 226 be connected to, make the 1st control oil circuit 224 be discharged oil circuit 228 be connected to.Work as a result, Make oil to be supplied to bar side balancing gate pit 245 by check valve 282, and the working oil in lid lateral pressure room 247 is on one side by flow Control valve 270 carries out flow control, is sent back to tank 234 by the 1st control oil circuit 224 and discharge oil circuit 228 on one side.
At this point, reducing the working oil of flow from the discharge of hydraulic cylinder 240, by flow control valve 270,280 becomes high temperature.It should The working oil of high temperature is cooled down by oil cooler 230, and is sent back to tank 234, the energy conduct generated in Driven by Hydraulic Cylinder device Thermal energy is released, so energy efficiency is lower.In addition, the Driven by Hydraulic Cylinder device due to need large-scale oil cooler 230 or The quantity of the valve used is more, and it is desirable to be simplified.
Invention content
So the present invention makes in view of the above problems, the purpose of the present invention is to provide one kind can be by device Structure simplifies and can improve the new and modified Driven by Hydraulic Cylinder device of energy efficiency.
In order to solve the above problems, a technical solution according to the present invention provides a kind of Driven by Hydraulic Cylinder device, the hydraulic pressure Cylinder driving device has：Hydraulic cylinder has the piston rod to activateding equipment actuating；Dynamotor, outside by device The motor of the work about electric power in portion functions, and is functioned as the generator for being externally supplied electric power to device；1st can Varying capacity pump motor, is attached on dynamotor, as the hydraulic pump hair for supplying hydraulic pressure to the lid lateral pressure room of hydraulic cylinder Wave function, and by the hydraulic pressure supplied from lid lateral pressure room and the power plant as dynamotor functions；2nd can Varying capacity pump motor, is attached on dynamotor, as the hydraulic pump hair for supplying hydraulic pressure to the bar side balancing gate pit of hydraulic cylinder Wave function, and by the hydraulic pressure supplied from bar side balancing gate pit and the power plant as dynamotor functions.
Can also be that the 1st variable capacity pump motor and the 2nd variable capacity pump motor are connected in the same drive shaft, Dynamotor is concatenated on the driving shaft.
Dynamotor can also be by convertor controls.
Dynamotor can also include the 1st dynamoelectric and power generation being attached in the 1st drive shaft of the 1st variable capacity pump motor Machine and the 2nd dynamotor being attached in the 2nd drive shaft of the 2nd variable capacity pump motor.
Can also be that at least one party in the 1st dynamotor and the 2nd dynamotor is by convertor controls.
It activated the crane arm driving device that equipment can also be implement.
As described above, in accordance with the invention it is possible to which apparatus structure is made to simplify, and carrying for energy efficiency can be realized It is high.
Description of the drawings
Fig. 1 is the definition graph for indicating to apply the crane arm driving device of Driven by Hydraulic Cylinder device for the present invention.
Fig. 2 is the loop diagram of the structure for the Driven by Hydraulic Cylinder device for indicating the 1st embodiment for the present invention.
Fig. 3 is to indicate eccentric（overcenter）The sectional view of type variable capacity pump motor.
Fig. 4 is the loop diagram of the structure for the Driven by Hydraulic Cylinder device for indicating the 2nd embodiment for the present invention.
Fig. 5 is the loop diagram for the structure for indicating previous Driven by Hydraulic Cylinder device.
Specific implementation mode
Hereinafter, being explained in detail to the preferred embodiments of the present invention with reference to attached drawing.In addition, in this specification and attached drawing In, identical reference numeral is assigned for the inscape of substantial functional structure having the same, thus omits repeated explanation.
<1. the 1st embodiment>
（1-1. crane arm driving devices）
First, it to the crane arm driving device of the Driven by Hydraulic Cylinder device in relation to present embodiment can be applied, simply carries out Explanation.Crane arm driving device is to activated an example of equipment.Fig. 1 is the schematic diagram for indicating crane arm driving device 100.Lifting In 100 implement such as being mounted on construction machines or discharge mechanism of arm driving device.
Crane arm driving device 100 has crane arm supporting part 110, crane arm 120, homework department 130, arm 140 and hydraulic pressure Cylinder 40.On crane arm supporting part 110, pivot suspension crane arm 120 in a rolling manner.The cylinder barrel of hydraulic cylinder 40 is installed in On crane arm supporting part 110, piston rod is installed on crane arm 120.The rise and fall of crane arm 120 is controlled by hydraulic cylinder 40 System.
In the front end of crane arm 120, arm 140 rotatably freely carry.It is equipped with homework department 130 in the lower end of arm 140. The rear end of crane arm 120 is equipped with weight equalizer 126.Homework department 130 and weight equalizer 126 can be along with crane arms 120 as a result, Rise and fall and mutually moved up and down using the top of crane arm supporting part 110 as fulcrum.The rise and fall of crane arm 120 is by liquid The drive control of cylinder pressure 40 carries out.
In the crane arm driving device 100, it is to uncharge that weight equalizer 126, which has in crane arm driving device 100, The front end of crane arm 120 can be made to rotate upward under state, i.e. in the state of there is no stowage weight object in homework department 130 Weight.Driven by Hydraulic Cylinder device in relation to present embodiment carries out to make the front end of crane arm 120 rise or fall to hydraulic pressure The control that cylinder 40 supplies working oil or working oil is discharged from hydraulic cylinder 40 controls the rise and fall of crane arm 120.
（1-2. Driven by Hydraulic Cylinder devices）
Then, an example of the structure of the Driven by Hydraulic Cylinder device 10 of the 1st embodiment for the present invention is illustrated.Fig. 2 It is the loop diagram of the structure for the hydraulic circuit for indicating Driven by Hydraulic Cylinder device 10.Driven by Hydraulic Cylinder device 10 has the 1st variable capacity Measure pump motor 20, the 2nd variable capacity pump motor 30, dynamotor 50 and hydraulic cylinder 40.
（1-2-1. hydraulic cylinder）
Hydraulic cylinder 40 is installed on crane arm 120 and the crane arm supporting part 110 of crane arm driving device 100 shown in FIG. 1, The piston rod 43 that has cylinder barrel 41 and can be moved forward and backward in cylinder barrel 41.Cylinder barrel 41 is installed on supporting part 110, piston rod 43 are installed on crane arm 120.Bar side balancing gate pit 45 and lid lateral pressure room 47 are divided by piston rod 43 in cylinder barrel 41.
Lid lateral pressure room 47 is connected to the 1st control oil circuit 22 being connected in the 1st variable capacity pump motor 20, bar side pressure Room 45 is connected to the 2nd control oil circuit 32 being connected in the 2nd variable capacity pump motor 30.It is controlled in the 1st control oil circuit 22 and the 2nd In oil circuit 32, it is equipped with the pressure detector 28,38 for measuring the pressure in respective oil circuit.
（1-2-2. variable capacity pump motors）
1st variable capacity pump motor 20 has the work(for the hydraulic pump that working oil is supplied as the lid lateral pressure room 47 to hydraulic cylinder 40 Can and as by working oil be discharged from lid lateral pressure room 47 by drive shaft 52 rotation drive hydraulic motor function.This Outside, the 2nd variable capacity pump motor 30 has the work(for the hydraulic pump that working oil is supplied as the bar side balancing gate pit 45 to hydraulic cylinder 40 Can and as by working oil be discharged from bar side balancing gate pit 45 by drive shaft 52 rotation drive hydraulic motor function.
In the Driven by Hydraulic Cylinder device in relation to present embodiment, the 1st variable capacity pump motor 20 and the 2nd variable displacement pump Motor 30 is attached in the same drive shaft 52.Thus, functioned as hydraulic pump in the variable capacity pump motor of a side, In the case that the variable capacity pump motor of another party is functioned as hydraulic motor, the drive shaft 52 brought by hydraulic motor Rotation driving energy is used as the energy for being used for that hydraulic pump is made to drive.
Thus, the variable capacity pump motor as hydraulic pump the required energy ratio of driving as hydraulic motor can In the case that the rotation driving energy of varying capacity pump motor is big, the electric power consumption of driving dynamotor 50 can be reduced.This Outside, the variable displacement pump horse in the required energy ratio of driving of the variable capacity pump motor as hydraulic pump as hydraulic motor In the case that the rotation driving energy that reaches is small, so that dynamotor 50 is rotated by remaining rotation driving energy, can generate Regenerated electric power.
Simply illustrate the configuration example of the 1st variable capacity pump motor 20 and the 2nd variable capacity pump motor 30.Fig. 3 is to indicate The sectional view of an example of variable capacity pump motor.In addition, the 1st variable capacity pump motor 20 and the 2nd variable capacity pump motor 30 can To be substantially the same structure.
Variable capacity pump motor shown in Fig. 3 is the piston pump motor of ramp type variable capacity type.Variable capacity pump motor Have cover 161, pump case 168 and quilt cover 161 and drive shaft 170 that pump case 168 is pivotally supported.The 1st discharge is equipped on cover 161 Access 163, the 1st discharge access 163 is in the case where variable capacity pump motor is functioned as hydraulic pump for sucking Working oil flows, and in the case where variable capacity pump motor is functioned as hydraulic motor for the work oil stream of discharge It is dynamic.In addition, being equipped with the 2nd discharge access 165 on cover 161, the 2nd discharge access 165 is in variable capacity pump motor as liquid Press pump function in the case of for discharge working oil flow, and variable capacity pump motor as hydraulic motor performance work( It is flowed for the working oil of importing in the case of energy.
1st discharge access 163 is connected to the tank (not shown) for storing working oil.2nd discharge access 165 and hydraulic cylinder 40 Balancing gate pit connection.In the case of the 1st variable capacity pump motor 20, the 2nd discharge access 165 is connected to lid lateral pressure room 47. In the case of the 2nd variable capacity pump motor 30, the 2nd discharge access 165 is connected to bar side balancing gate pit 45.
Link cylinder body 180 in drive shaft 170, cylinder body 180 is integrally rotated with drive shaft 170.The one of cylinder body 180 End side is equipped with valve plate 190, and inclined plate 175 is equipped in another side.The face sliding contact of the one end of cylinder body 180 is in valve plate On 190.On cylinder body 180, multiple cylinders 182 are divided into along the axial direction of drive shaft 170.In each cylinder 182, it can move in an axial direction It is inserted into piston 185 dynamicly, chamber volume 188 is marked off by cylinder 182 and piston 185.Chamber volume 188 can be via being located at valve plate Hydraulic port 192,194 on 190 is connected to the 1st discharge access 163 being formed on cover 161 and the 2nd discharge access 165.
From the end sliding contact of 182 piston 185 outstanding of cylinder on inclined plate 175.When cylinder body 180 and drive shaft 170 1 When playing rotation, 185 one side sliding contact of piston is rotated centered on drive shaft 170 on one side on inclined plate 175.In 175 phase of inclined plate In the state of being tilted for the face orthogonal with drive shaft 170, with the rotation, piston 185 moves back and forth in cylinder 182, volume 188 expansions of room/diminution.
In the case where making variable capacity pump motor be functioned as hydraulic pump, inclined plate 175 is set to tilt, so that holding The 1st discharge access 163 of cover 161 is connected to chamber volume 188 in the region that product room 188 is expanded, in the region that chamber volume 188 is shunk In the 2nd discharge access 165 be connected to chamber volume 188.As a result, with the rotation of variable capacity pump motor, the work that is stored in tank Make oil is inhaled into chamber volume 188 via the 1st discharge access 163, and in chamber volume 188 be pressurized after, given via the 2nd Row's access 165 is discharged.Pump emission flow can be adjusted by controlling the amount of verting.
In addition, in the case where making variable capacity pump motor be functioned as hydraulic motor, inclined plate 175 is made to tilt, with So that the 1st discharge access 163 is communicated to chamber volume 188 in the region that chamber volume 188 is shunk, in 188 widened area of chamber volume The 2nd discharge access 165 is communicated to chamber volume 188 in domain.Variable capacity is made by the hydraulic pressure being discharged from the balancing gate pit of hydraulic cylinder 40 as a result, Pump motor rotation driving is measured, output torque is generated in drive shaft 170.
The inclination of inclined plate 175（The amount of verting）It can be adjusted by hydraulic actuator 195.In particular, in the present embodiment, making With bias（overcenter）The variable capacity pump motor of type, inclined plate 175 are configured to, can not only to a direction and can be to Both direction tilts.The hydraulic actuator 195 is made of the hydraulic circuit for having direction switch valve etc., by selectively make to The pressure of the working oil of balancing gate pit's supply of one party in the balancing gate pits Liang Ge becomes larger, and inclined plate 175 can be made to incline to a direction Tiltedly.In addition, by supplying working oil for the balancing gate pits Liang Ge with defined balance, the amount of verting can be made to become zero.Thereby, it is possible to Make the function stop as hydraulic pump or hydraulic motor of variable capacity pump motor.
Adjust 195 not shown electronic control unit of the hydraulic actuator control for the amount of verting.Electronic control unit is based on The operative orientation of crane arm controls what the pressure detector 28,38 in oil circuit 32 measured by being located at the 1st control oil circuit 22 and the 2nd Hydraulic pressure P1, P2 etc., control direction switching valve etc., the appropriate inclined direction for adjusting inclined plate 175, tilt quantity.
（1-2-3. dynamotor）
Dynamotor 50 works by the electric power supplied from the electric power source 70 of the outside of Driven by Hydraulic Cylinder device 10, as making The motor of the rotation driving of drive shaft 52 functions.In addition, dynamotor 50 as hydraulic motor by by functioning The 1st variable capacity pump motor 20 or the rotary driving force of drive shaft 52 that brings of the 2nd variable capacity pump motor 30 and rotate, from And it is functioned as to the generator for being externally supplied electric power of Driven by Hydraulic Cylinder device 10.
Dynamotor 50 is for example made of the motor of three-phase alternating current formula.Dynamotor 50, which generates, assigns drive shaft 52 Rotary driving force.The rotary driving force of generation corresponds to the need of the 1st variable capacity pump motor 20 and the 2nd variable capacity pump motor 30 It wants driving force and is exported.In addition, dynamotor 50 is rotated by the rotating torques of drive shaft 52, regenerated electric power is generated. The regenerated electric power of generation is supplied to electric load equipment (not shown).For example, by as provided with crane arm driving device 100 Equipment in electricity usage.Regenerated electric power can also be by electric power storage to accumulator or electrical storage device etc..
（1-3. use example）
Hereinafter, illustrating the use example for driving the Driven by Hydraulic Cylinder device 10 of crane arm driving device 100.
（1-3-1. crane arm rises）
When making the front end of crane arm 120 of crane arm driving device 100 rise, the 1st variable capacity pump motor 20 is used as hydraulic pressure Pump functions, and the 2nd variable capacity pump motor 30 is functioned as hydraulic motor.That is, to the lid lateral pressure room of hydraulic cylinder 40 47 supply working oils, on the other hand working oil is discharged from bar side balancing gate pit 45.At this point, electronic control unit is based on setting in outside The measurement of fixed crane arm speed and the pressure detector 28,38 being located in the 1st control control oil circuit 32 of oil circuit 22 and the 2nd Value controls the amount of verting of the 1st variable capacity pump motor 20 and the 2nd variable capacity pump motor 30.
Specifically, electronic control unit monitor on one side the 1st control oil circuit 22 and the 2nd control oil circuit 32 in hydraulic pressure P1, P2 controls the amount of verting of the 1st variable capacity pump motor 20 and the 2nd variable capacity pump motor 30, so that before piston rod 43 on one side Become desired speed into speed.
At this point, the 2nd variable capacity pump motor 30 makes drive shaft 52 as by the working oil being discharged from bar side balancing gate pit 45 The hydraulic motor of rotation driving functions, and generates the rotary driving force of drive shaft 52.Thus, it is possible to will be by the 2nd variable capacity The row for the working oil that the rotary driving force for the drive shaft 52 that pump motor 30 is brought is used to be carried out by the 1st variable capacity pump motor 20 It puts, the electric power of dynamotor 50 can be set to smaller.
In addition, the rotary driving force in the drive shaft 52 brought by the 2nd variable capacity pump motor 30 is more than by the 1st variable capacity In the case of the required rotary driving force of discharge for measuring the working oil that pump motor 20 carries out, by the 2nd variable capacity pump motor 30 The surplus of the rotary driving force for the drive shaft 52 brought is converted to electric power by dynamotor 50.The electric power sent out is supplied to To electric load equipment (not shown).
（1-3-2. crane arm declines）
When making the front end of crane arm 120 of crane arm driving device 100 decline, the 1st variable capacity pump motor 20 is used as hydraulic pressure Motor functions, and the 2nd variable capacity pump motor 30 is functioned as hydraulic pump.That is, to the bar side balancing gate pit of hydraulic cylinder 40 45 supply working oils, and on the other hand, working oil is discharged from lid lateral pressure room 47.At this point, electronic control unit and crane arm It is same when 120 rising, based on external setting-up crane arm speed and be located at the 1st control oil circuit 22 and the 2nd control oil circuit The measured value of pressure detector 28,38 in 32, the 1st variable capacity pump motor 20 of control and the 2nd variable capacity pump motor 30 The amount of verting.
Specifically, electronic control unit monitor on one side the 1st control oil circuit 22 and the 2nd control oil circuit 32 in hydraulic pressure P1, P2 controls the amount of verting of the 1st variable capacity pump motor 20 and the 2nd variable capacity pump motor 30, so that after piston rod 43 on one side Back speed degree becomes desired speed.
At this point, the 1st variable capacity pump motor 20 makes drive shaft 52 as by the working oil being discharged from lid lateral pressure room 47 The hydraulic motor of rotation driving functions, and generates the rotary driving force of drive shaft 52.Thus, it is possible to will be by the 1st variable capacity The row for the working oil that the rotary driving force for the drive shaft 52 that pump motor 20 is brought is used to be carried out by the 2nd variable capacity pump motor 30 It puts, the electric power of dynamotor 50 can be set to smaller.
In addition, the rotary driving force in the drive shaft 52 brought by the 1st variable capacity pump motor 20 is more than by the 2nd variable capacity In the case of the required rotary driving force of discharge for measuring the working oil that pump motor 30 carries out, by the 1st variable capacity pump motor 20 The surplus of the rotary driving force for the drive shaft 52 brought is converted to electric power by dynamotor 50.The electric power sent out is supplied to To electric load equipment (not shown).
As described above, the Driven by Hydraulic Cylinder device 10 in relation to present embodiment has：1st variable capacity pump motor 20, it is functioned as the hydraulic pump for supplying working oil to the lid lateral pressure room 47 of hydraulic cylinder 40, and by from lid lateral pressure Room 47 be discharged working oil and the power plant as dynamotor 50 functions；2nd variable capacity pump motor 30, as The hydraulic pump that working oil is supplied to the bar side balancing gate pit 45 of hydraulic cylinder 40 functions, and is discharged by from bar side balancing gate pit 45 Working oil and the power plant as dynamotor 50 functions.
Also, it is driven by as hydraulic pressure for the rotation for making the variable capacity pump motor of a side be functioned as hydraulic pump The rotary driving force of the variable capacity pump motor for another party that motor functions assists.Thereby, it is possible to reduce to make drive shaft 52 Rotate the amount of power of the dynamotor 50 of driving.In turn, in the variable capacity pump motor functioned as hydraulic motor In the case that rotary driving force is more than the required rotary driving force of variable capacity pump motor functioned as hydraulic pump, borrow Remaining rotary driving force is helped, regenerative electric power is carried out using dynamotor 50.Thus, energy efficiency improves.
In addition, the Driven by Hydraulic Cylinder device 10 in relation to present embodiment do not have direction switch valve and flow control valve, Oil cooler etc., and have simple structure, cost can be reduced, and can realize the raising of energy efficiency.
<2. the 2nd embodiment>
Then, the Driven by Hydraulic Cylinder device of the 2nd embodiment for the present invention is illustrated.Liquid in relation to present embodiment Cylinder pressure driving device is driven by the 1st variable capacity pump motor and the dynamotor of the 2nd variable capacity pump motor independently It is on this point of dynamic control, different from the Driven by Hydraulic Cylinder device in relation to the 1st embodiment.
Fig. 4 is the loop diagram of the structure for the hydraulic circuit for indicating the Driven by Hydraulic Cylinder device 10A in relation to present embodiment.Liquid Cylinder pressure driving device 10A have the 1st variable capacity pump motor 20, the 2nd variable capacity pump motor 30, the 1st dynamotor 50a, 2nd dynamotor 50b and hydraulic cylinder 40.1st variable capacity pump motor 20, the 2nd variable capacity pump motor 30, hydraulic cylinder 40 divide Structure same as part of Driven by Hydraulic Cylinder device 10 in relation to the 1st embodiment can not made.
In the present embodiment, the 1st variable capacity pump motor 20 is by the 1st dynamotor 50a drivings, the 2nd variable capacity Pump motor 30 is by the 2nd dynamotor 50b drivings.In the Driven by Hydraulic Cylinder device 10A in relation to present embodiment, the 1st is variable The drive shaft 52a of capacity pump motor 20 and the drive shaft 52b of the 2nd variable capacity pump motor 30 are mutual indepedent.1st dynamotor 50a and the 2nd dynamotor 50b are galvanically connected in electric power source 70.1st dynamotor 50a and the 2nd dynamotor 50b can make structure same as part of Driven by Hydraulic Cylinder device 10 in relation to the 1st embodiment respectively.
In the present embodiment, also make piston rod 43 march forward direction move in the case of, make the 1st variable displacement pump horse It is functioned up to 20 as hydraulic pump, the 2nd variable capacity pump motor 30 is made to be functioned as hydraulic motor.On the other hand, exist In the case of so that piston rod 43 is moved in the reverse direction, so that the 1st variable capacity pump motor 20 is functioned as hydraulic motor, make 2nd variable capacity pump motor 30 is functioned as hydraulic pump.
The control of the amount of verting of the variable capacity pump motor functioned as hydraulic pump is based on crane arm operative orientation, rises Weighing arm speed controls hydraulic pressure P1, P2 that the pressure detector 28,38 in oil circuit 32 measures by being located at the 1st control oil circuit 22 and the 2nd Etc. carrying out.That is, electronic control unit (not shown) controls the 1st variable capacity pump motor 20 and the 2nd variable capacity pump motor 30 The amount of verting so that the forward speed of piston rod 43 or astern speed become desired speed.At this point, being played as hydraulic motor The variable capacity pump motor of function is driven by the working oil being discharged from the balancing gate pit of hydraulic cylinder 40, by by the variable capacity The rotary driving force for the drive shaft that pump motor is brought carries out regenerative electric power using dynamotor.As a result, by as hydraulic motor The rotary driving force for the drive shaft that the variable capacity pump motor functioned is brought is converted into electric power, is supplied to (not shown) Electric load equipment.
As described above, the Driven by Hydraulic Cylinder device 10A in relation to present embodiment and the hydraulic cylinder in relation to the 1st embodiment Driving device 10 is same, has the 1st variable capacity pump motor 20 and the 2nd functioned respectively as hydraulic pump and hydraulic motor Variable capacity pump motor 30.By the rotary driving force of the variable capacity pump motor functioned as hydraulic motor, electricity is utilized Dynamic generator carries out regenerative electric power.Thus, energy efficiency improves.In addition, the Driven by Hydraulic Cylinder device 10A in relation to present embodiment Direction switch valve and flow control valve etc. are not had, and has simple structure, cost can be reduced, and can realize energy The raising of efficiency.
More than, the preferred embodiments of the present invention is illustrated in detail with reference to attached drawing, but the present invention and unlimited Due to such example.Obviously, as long as the people with the common knowledge in the technical field belonging to the present invention, it will be able to Various modifications or fixed case are expected in the scope of technological thought recorded in claims, it should be understood that be these modifications Or fixed case also would naturally fall within the technical scope of the present invention.
For example, in the above-described embodiment, Driven by Hydraulic Cylinder device 10,10A are used in crane arm driving device 100 In, but the present invention is not limited to such examples.For being used in the rise and fall of the arm of the scraper bowl in support hydraulic excavator Driven by Hydraulic Cylinder device etc., can also be applied to it is other activated equipment, as long as draw direction can be acted on to hydraulic cylinder Power and compression direction power equipment.
In addition, in above-mentioned each embodiment, can also have the converter of control dynamotor 50,50a, 50b Circuit.If dynamotor 50,50a, 50b can carry out convertor controls, the response of hydraulic control improves, can make The action of hydraulic cylinder 40 in the faster region of pace of change of the hydraulic pressure of hydraulic cylinder 40 improves.In addition, making Driven by Hydraulic Cylinder It, can by stopping dynamotor 50,50a, 50b in the stopping of system in the case of device 10,10A intermittent runnings Realize the reduction of further required energy.

Claims (6)

1. a kind of Driven by Hydraulic Cylinder device, the Driven by Hydraulic Cylinder device is characterized in that, which has：
Hydraulic cylinder has the piston rod activated to activateding equipment；
Dynamotor is functioned as the motor by the work about electric power outside device, and as to outside device The generator supplied electric power functions；
1st variable capacity pump motor is attached on aforementioned dynamotor, is supplied as to the lid lateral pressure room of aforementioned hydraulic cylinder It is functioned to the hydraulic pump of hydraulic pressure, and by the hydraulic pressure supplied from aforementioned cover lateral pressure room and as aforementioned dynamotor Power plant function；
2nd variable capacity pump motor is attached on aforementioned dynamotor, is supplied as to the bar side balancing gate pit of aforementioned hydraulic cylinder It is functioned to the hydraulic pump of hydraulic pressure, and by the hydraulic pressure supplied from aforementioned bar side balancing gate pit and as aforementioned dynamotor Power plant function.
2. Driven by Hydraulic Cylinder device as described in claim 1, which is characterized in that
Aforementioned 1st variable capacity pump motor and aforementioned 2nd variable capacity pump motor are connected in the same drive shaft, aforementioned electricity Dynamic generator is attached in aforementioned drive shaft.
3. Driven by Hydraulic Cylinder device as claimed in claim 2, which is characterized in that
Aforementioned dynamotor is by convertor controls.
4. Driven by Hydraulic Cylinder device as described in claim 1, which is characterized in that
Aforementioned dynamotor includes the 1st dynamotor being attached in the 1st drive shaft of aforementioned 1st variable capacity pump motor With the 2nd dynamotor being attached in the 2nd drive shaft of aforementioned 2nd variable capacity pump motor.
5. Driven by Hydraulic Cylinder device as claimed in claim 4, which is characterized in that
At least one party in aforementioned 1st dynamotor and aforementioned 2nd dynamotor is by convertor controls.
6. such as Driven by Hydraulic Cylinder device according to any one of claims 1 to 5, which is characterized in that
It is aforementioned to activated the crane arm driving device that equipment is implement.
CN201680056289.6A 2015-09-28 2016-08-03 Driven by Hydraulic Cylinder device Pending CN108350914A (en)

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KR20180043350A (en) 2018-04-27

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Application publication date: 20180731