CN104847749B - A kind of electric-hydraulic combined formula linear actuator and its energy-saving operation method - Google Patents
A kind of electric-hydraulic combined formula linear actuator and its energy-saving operation method Download PDFInfo
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- CN104847749B CN104847749B CN201510116566.5A CN201510116566A CN104847749B CN 104847749 B CN104847749 B CN 104847749B CN 201510116566 A CN201510116566 A CN 201510116566A CN 104847749 B CN104847749 B CN 104847749B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A kind of electric-hydraulic combined formula linear actuator and its energy-saving operation method disclosed by the invention, are related to linear actuator and its energy-saving operation method, belong to electromechanical integration technology area.The present invention includes encoder, motor, nut, leading screw, push rod, inner cylinder, outer barrel, hydraulic control mouthful A, hydraulic control mouthful B, control valve A, control valve B, leakage-free ball valve A, leakage-free ball valve B, leakage-free ball valve C, leakage-free ball valve D and oil return fuel tank, possesses electric-hydraulic combined formula mode of operation.The advantage of the invention is that realizing the independent control of linear actuator load port, when required oil liquid pressure is opposite with the direction of motion loaded, oil feeding line need not carry out high-pressure oil feed, only need low pressure repairing, therefore, save energy, reduce heating.In addition, the present invention is generated electricity by drive motor, while the oil liquid pressure in opposite direction with load movement needed for offer, unnecessary energy is stored in the form of electric energy, energy is saved.
Description
Technical field
The present invention relates to a kind of linear actuator and its energy-saving operation method, more particularly to a kind of straight line of electric-hydraulic combined formula
Actuator and its energy-saving operation method, belong to electromechanical integration technology area.
Background technology
The pressure and traffic transformation of the chamber of piston two can be thrust and space rate by hydraulic cylinder, so that hydraulic energy be changed
For mechanical energy, linear reciprocal motion is realized.Hydraulic cylinder structure is simple, reliable operation, and power density is high, and load capacity is strong,
Stable movement.Hydraulic cylinder can not generally work independently, it is necessary in the cooperation of control valve, conventional hydraulic valve control system, control valve
Two control mouths are that machinery is connected firmly, when being controlled to hydraulic cylinder, and the opening degree of one of control mouth can only be carried out
Control, another control mouth can change therewith, when oil circuit is by servo-actuated control mouth oil return, because the throttling of control mouth is made
With can produce heating, energy is slatterned in the form of heat energy.
The waste of linear actuator energy how is reduced, and reclaims unnecessary energy and is badly in need of asking for solution as one
Topic.
The content of the invention
The technical problem to be solved in the present invention is to realize that linear actuator saves energy, reduces heating, and can realize and will bear
Unnecessary energy is reclaimed with electrical energy form during carrying is dynamic.The present invention discloses a kind of electric-hydraulic combined formula linear actuator and its section
Can method of work.
The purpose of the present invention is achieved through the following technical solutions：
A kind of electric-hydraulic combined formula linear actuator disclosed by the invention, including encoder, motor, nut, leading screw, push rod,
Inner cylinder, outer barrel, hydraulic control mouthful A, hydraulic control mouthful B, control valve A, control valve B, leakage-free ball valve A, leakage-free ball valve B, leakage-free ball valve
C, leakage-free ball valve D and oil return fuel tank, wherein, the central axis of inner cylinder, outer barrel and push rod is overlapped, and outer barrel, inner cylinder and push rod are equal
For hollow structure；Together with inner cylinder is fastened by bolts with outer barrel, push rod is nested between inner cylinder and outer barrel, and can be along central shaft
Line is slided；Liquid controling cavity A is formed between outer barrel and push rod, fluid enters liquid controling cavity A by hydraulic control mouthful A, between outer barrel and push rod
Moving contact face is sealed with sealing ring；Liquid controling cavity B is formed between push rod and inner cylinder, fluid enters liquid controling cavity B by hydraulic control mouthful B,
Moving contact face between push rod and inner cylinder is sealed with sealing ring；Motor is coaxially mounted to the outer end of push rod, motor with encoder
Axle is fixed together with the integrated workpiece of lead screw machining or using shaft coupling；Leading screw and nut constitute a pair of lead screw pair, spiral shell
Mother is fixed on the outer end of inner cylinder, and leading screw can be moved with push rod along central axis；Control valve A oil-feed port P, control valve B confession
Hydraulic fluid port P is connected with hydraulic oil, and control valve A oil return inlet T, control valve B oil return inlet T are connected with oil return fuel tank；Control valve A control
Donsole A is connected by leakage-free ball valve A, hydraulic control mouthful A with liquid controling cavity A, and control valve A control mouth B is blocked；Control valve B control
Mouth A is connected by leakage-free ball valve B, hydraulic control mouthful B with liquid controling cavity B, and control valve B control mouth B is blocked；The one of leakage-free ball valve C
Individual port is connected with leakage-free ball valve A, and another port is connected with oil return fuel tank；Leakage-free ball valve D a port with without letting out
The valve B that loses is connected, and another port is connected with oil return fuel tank.
Together with above-mentioned motor and push rod are connected firmly by bolt, motor can drive leading screw to produce rotary motion, due to interior
Together with cylinder, outer barrel and nut are connected firmly by bolt, therefore linear relative movement is just generated between push rod and outer barrel, pass through control
The current signal of motor processed can control speed and the direction of linear motion, and the rotation of leading screw has also driven turning for encoder simultaneously
It is dynamic, the pulse signal detected for position is produced, this is typical electric cylinder motion feature.
Fluid can be entered by hydraulic control mouthful A forms liquid controling cavity A between outer barrel and push rod, so that driving push rod retraction is outer
Cylinder；Fluid can be entered by hydraulic control mouthful B forms liquid controling cavity B between inner cylinder and push rod, so that driving push rod retraction outer barrel；Also
It is to say, by controlling liquid controling cavity A and liquid controling cavity B oil liquid pressure and flow, speed and side that push rod moves along a straight line can be controlled
To this is typical hydraulic cylinder feature.The moving contact face of push rod and outer barrel and inner cylinder employs hydraulic cylinder piston
Seal form, it is ensured that fluid will not enter the working region of motor, influence the normal work of motor.Push rod linear motion can band
Dynamic motor produces idle running, but drag minimization, can be neglected under normal circumstances.
A kind of electric-hydraulic combined formula linear actuator energy-saving operation method disclosed by the invention is：If being positive direction upwards, bear
Mounted mass is m, and oil liquid pressure is F, it is considered to equilibrium equation F=mg+ma, then by controlling the i.e. controllable loads of oil liquid pressure F
Acceleration, and oil liquid pressure F can be realized by the control to oil circuit, be specifically divided into four kinds of mode of operations：
Mode of operation is 1. as v ＞ 0, F ＞ 0, and control valve B is in direct mode operation, by adjust control mouth A opening degree come
Control push rod displacement, open leakage-free ball valve B, high-voltage oil liquid by control valve B oil-feed port P, control valve B control mouth A,
Leak ball valve B, hydraulic control mouthful B and enter liquid controling cavity B；The fluid opened in leakage-free ball valve C, liquid controling cavity A is let out by hydraulic control mouthful A, nothing
The valve C that loses returns to oil return fuel tank.At this time it is also possible to electrical power, make linear actuator be in electric-hydraulic combined mode of operation, institute
There is the electric-hydraulic combined mode of operation stated the motion feature of hydraulic cylinder to have the motion feature of electric cylinder again.
Mode of operation opens leakage-free ball valve D 2. as v ＞ 0, F ＜ 0, by hydraulic control mouthful B, leakage-free ball valve D from oil return
Fuel tank repairing into liquid controling cavity B；The fluid opened in leakage-free ball valve C, liquid controling cavity A is returned by hydraulic control mouthful A, leakage-free ball valve C
To oil return fuel tank；Motor is in power generation operation pattern, with energy-storage travelling wave tube formation closed-loop path, electrical power storage is got up, passed through
The moment of torsion of controlled motor controls the displacement of push rod.
Mode of operation opens leakage-free ball valve C 3. as v ＜ 0, F ＞ 0, by hydraulic control mouthful A, leakage-free ball valve C from oil return
Fuel tank repairing into liquid controling cavity A；The fluid opened in leakage-free ball valve D, liquid controling cavity B is returned by hydraulic control mouthful B, leakage-free ball valve D
To oil return fuel tank；Motor is in power generation operation pattern, with energy-storage travelling wave tube formation closed-loop path, electrical power storage is got up, passed through
The moment of torsion of controlled motor controls the displacement of push rod.
Mode of operation is 4. as v ＜ 0, F ＜ 0, and control valve A is in direct mode operation, by adjust control mouth A opening degree come
Control push rod displacement, open leakage-free ball valve A, high-voltage oil liquid by control valve A oil-feed port P, control valve A control mouth A,
Leak ball valve A, hydraulic control mouthful A and enter liquid controling cavity A；The fluid opened in leakage-free ball valve D, liquid controling cavity B is let out by hydraulic control mouthful B, nothing
The valve D that loses returns to oil return fuel tank.At this time it is also possible to electrical power, make linear actuator be in electric-hydraulic combined mode of operation, institute
There is the electric-hydraulic combined mode of operation stated the motion feature of hydraulic cylinder to have the motion feature of electric cylinder again.
Beneficial effect：
The advantage of a kind of electric-hydraulic combined formula linear actuator and its energy-saving operation method disclosed by the invention is to realize
The independent control of load port, when required oil liquid pressure is opposite with the direction of motion loaded, oil feeding line need not enter horizontal high voltage
Fuel feeding, only needs low pressure repairing, therefore, saves energy, reduces heating.In addition, the present invention is generated electricity by drive motor, carrying
While for required oil liquid pressure in opposite direction with load movement, unnecessary energy is stored in the form of electric energy.
Brief description of the drawings
Fig. 1 is a kind of electric-hydraulic combined formula linear actuator sectional view of the present invention；
In figure：1- encoders, 2- motors, 3- motor shafts, 4- nuts, 5- inner cylinders, 6- hydraulic controls mouthful A, 7- leading screw, 8- push rods,
9- outer barrels, 10- liquid controling cavity A, 11- liquid controling cavity B, 12- hydraulic control mouthful B, 13- control valve A, 14- control valve B, 15- leakage-free ball valve A,
16- leakage-free ball valve B, 17- leakage-free ball valve C, 18- leakage-free ball valve D, 19- oil return fuel tanks.
Embodiment
The present invention will be described in detail below in conjunction with the accompanying drawings.The present embodiment enters under premised on technical solution of the present invention
Row is implemented, and gives detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following realities
Apply example.
Embodiment 1
As shown in figure 1, a kind of electric-hydraulic combined formula linear actuator disclosed in the present embodiment, including encoder 1, motor 2, spiral shell
Mother 4, leading screw 7, push rod 8, inner cylinder 5, outer barrel 9, hydraulic control mouthful A6, hydraulic control mouthful B12, control valve A13, control valve B14, leakage-free ball valve
A15, leakage-free ball valve B16, leakage-free ball valve C17, leakage-free ball valve D18 and oil return fuel tank 19, wherein inner cylinder 5, outer barrel 9 and push away
The central axis of bar 8 is overlapped, and outer barrel 9, inner cylinder 5 and push rod 8 are hollow structure；Inner cylinder 5 and outer barrel 9 are fastened by bolts one
Rise, push rod 8 is nested between inner cylinder 5 and outer barrel 9, and can be slided along central axis；Liquid controling cavity is formed between outer barrel 9 and push rod 8
A10, fluid enters liquid controling cavity A10 by hydraulic control mouthful A6, and the moving contact face between outer barrel 9 and push rod 8 is sealed with sealing ring；Push away
Liquid controling cavity B11 is formed between bar 8 and inner cylinder 5, fluid enters liquid controling cavity B11 by hydraulic control mouthful B12, between push rod 8 and inner cylinder 5
Moving contact face is sealed with sealing ring；Motor 2 is coaxially mounted to the outer end of push rod 8 with encoder 1, and motor shaft 3 is processed with leading screw 7
Integrated workpiece is fixed together using shaft coupling；Leading screw 7 and nut 4 constitute a pair of lead screw pair, and nut 4 is fixed on interior
The outer end of cylinder 5, leading screw 7 can be moved with push rod 8 along central axis；Control valve A13 oil-feed port P, control valve B14 oil-feed port
P is connected with hydraulic oil, and control valve A13 oil return inlet T, control valve B14 oil return inlet T are connected with oil return fuel tank 19；Control valve A13
Control mouth A be connected by leakage-free ball valve A15, hydraulic control mouthful A6 with liquid controling cavity A10, control valve A13 control mouth B is blocked；Control
Valve B14 processed control mouth A is connected by leakage-free ball valve B16, hydraulic control mouthful B12 with liquid controling cavity B11, control valve B14 control mouth B
Block；Leakage-free ball valve C17 a port is connected with leakage-free ball valve A15, and another port is connected with oil return fuel tank 19；Nothing
Leakage ball valve D18 a port is connected with leakage-free ball valve B16, and another port is connected with oil return fuel tank 19.
As shown in figure 1, together with motor 2 and push rod 8 connected firmly by bolt, motor 2 can drive leading screw 7 to produce rotation fortune
It is dynamic, connected firmly by bolt due to inner cylinder 5, outer barrel 9 and nut 4 together with, therefore just generate between push rod 8 and outer barrel 9 relative
Linear motion, speed and the direction of linear motion can be controlled by the current signal of controlled motor 2, the rotation of leading screw 7 is simultaneously
Also the rotation of encoder 1 has been driven, the pulse signal detected for position has been produced, this is typical electric cylinder motion feature.
As shown in figure 1, fluid can be entered by hydraulic control mouthful A6 forms liquid controling cavity A10 between outer barrel 9 and push rod 8, so that
The retraction outer barrel 9 of driving push rod 8；Fluid can be entered by hydraulic control mouthful B12 forms liquid controling cavity B11 between inner cylinder 5 and push rod 8, from
And the retraction outer barrel 9 of driving push rod 8；That is, oil liquid pressure and flow by controlling liquid controling cavity A10 and liquid controling cavity B11, energy
Speed and direction that enough control push rod 8 moves along a straight line, this is typical hydraulic cylinder feature.Push rod 8 and outer barrel 9 and inner cylinder 5
Moving contact face employ the seal form of hydraulic cylinder piston, it is ensured that fluid will not enter the working region of motor 2, shadow
Ring the normal work of motor 2.The linear motion meeting drive motor 2 of push rod 8 produces idle running, but drag minimization, can neglect under normal circumstances
Slightly.
As shown in figure 1, a kind of energy-saving operation method of electric-hydraulic combined formula linear actuator disclosed in the present embodiment：If upwards
For positive direction, load quality is m, and oil liquid pressure is F, it is considered to equilibrium equation F=mg+ma, then by controlling oil liquid pressure F
The acceleration of load is controlled, and oil liquid pressure F can be realized by the control to oil circuit, be specifically divided into four kinds of mode of operations：
Mode of operation is 1. as v ＞ 0, F ＞ 0, and control valve B14 is in direct mode operation, by the opening degree for adjusting control mouth A
To control the displacement of push rod 8, leakage-free ball valve B16, oil-feed port P, control valve B14 of the high-voltage oil liquid by control valve B14 are opened
Control mouth A, leakage ball valve B16, hydraulic control mouthful B12 enter liquid controling cavity B11；Open in leakage-free ball valve C17, liquid controling cavity A10
Fluid returns to oil return fuel tank 19 by hydraulic control mouthful A6, leakage-free ball valve C17.At this time it is also possible to be powered to motor 2, make straight line
Dynamic device is in electric-hydraulic combined mode of operation, and described electric-hydraulic combined mode of operation and the motion feature with hydraulic cylinder have electricity again
The motion feature of dynamic cylinder.
2. mode of operation as v ＞ 0, F ＜ 0, opens leakage-free ball valve D18, passes through hydraulic control mouthful B12, leakage-free ball valve D18
From the repairing into liquid controling cavity B11 of oil return fuel tank 19；The fluid opened in leakage-free ball valve C17, liquid controling cavity A10 passes through hydraulic control mouthful
A6, leakage-free ball valve C17 return to oil return fuel tank 19；Motor 2 is in power generation operation pattern, closed back with energy-storage travelling wave tube formation
Road, electrical power storage is got up, and the displacement of push rod 8 is controlled by the moment of torsion of controlled motor 2.
3. mode of operation as v ＜ 0, F ＞ 0, opens leakage-free ball valve C17, passes through hydraulic control mouthful A6, leakage-free ball valve C17
From the repairing into liquid controling cavity A10 of oil return fuel tank 19；The fluid opened in leakage-free ball valve D18, liquid controling cavity B11 passes through hydraulic control mouthful
B12, leakage-free ball valve D18 return to oil return fuel tank 19；Motor 2 is in power generation operation pattern, closed back with energy-storage travelling wave tube formation
Road, electrical power storage is got up, and the displacement of push rod 8 is controlled by the moment of torsion of controlled motor 2.
Mode of operation is 4. as v ＜ 0, F ＜ 0, and control valve A13 is in direct mode operation, by the opening degree for adjusting control mouth A
To control the displacement of push rod 8, leakage-free ball valve A15, oil-feed port P, control valve A13 of the high-voltage oil liquid by control valve A13 are opened
Control mouth A, leakage ball valve A15, hydraulic control mouthful A6 enter liquid controling cavity A10；Open the oil in leakage-free ball valve D18, liquid controling cavity B11
Liquid returns to oil return fuel tank 19 by hydraulic control mouthful B12, leakage-free ball valve D18.At this time it is also possible to be powered to motor 2, make straight line start
Device is in electric-hydraulic combined mode of operation, and described electric-hydraulic combined mode of operation and the motion feature with hydraulic cylinder have electronic again
The motion feature of cylinder.
A kind of advantage of electric-hydraulic combined formula linear actuator and its energy-saving operation method is to work as institute disclosed in the present embodiment
When the oil liquid pressure needed is opposite with the direction of motion loaded, oil feeding line need not carry out high-pressure oil feed, only need low pressure repairing,
And generated electricity by drive motor, will be unnecessary while the oil liquid pressure in opposite direction with load movement needed for offer
Energy is stored in the form of electric energy.
Claims (3)
1. a kind of electric-hydraulic combined formula linear actuator, including encoder (1), motor (2), nut (4), leading screw (7), push rod (8),
Inner cylinder (5), outer barrel (9), hydraulic control mouthful A (6), hydraulic control mouthful B (12), control valve A (13), control valve B (14), leakage-free ball valve A
(15), leakage-free ball valve B (16), leakage-free ball valve C (17), leakage-free ball valve D (18) and oil return fuel tank (19)；Its feature exists
In：The central axis of inner cylinder (5), outer barrel (9) and push rod (8) is overlapped, and outer barrel (9), inner cylinder (5) and push rod (8) are hollow knot
Structure；Inner cylinder (5) and outer barrel (9) are fastened by bolts together, and push rod (8) is nested between inner cylinder (5) and outer barrel (9), and can
Slided along central axis；Liquid controling cavity A (10) is formed between outer barrel (9) and push rod (8), fluid enters hydraulic control by hydraulic control mouthful A (6)
Chamber A (10), the moving contact face between outer barrel (9) and push rod (8) is sealed with sealing ring；Formed between push rod (8) and inner cylinder (5)
Liquid controling cavity B (11), fluid enters liquid controling cavity B (11), the moving contact between push rod (8) and inner cylinder (5) by hydraulic control mouthful B (12)
Face is sealed with sealing ring；Motor (2) is coaxially mounted to the outer end of push rod (8) with encoder (1), and motor shaft (3) adds with leading screw (7)
The integrated workpiece of work is fixed together using shaft coupling；Leading screw (7) and nut (4) constitute a pair of lead screw pair, nut (4)
The outer end of inner cylinder (5) is fixed on, leading screw (7) can be moved with push rod (8) along central axis；Control valve A (13) oil-feed port P,
Control valve B (14) oil-feed port P is connected with hydraulic oil, control valve A (13) oil return inlet T, control valve B (14) oil return inlet T with
Oil return fuel tank (19) is connected；Control valve A (13) control mouth A passes through leakage-free ball valve A (15), hydraulic control mouthful A (6) and liquid controling cavity A
(10) it is connected, control valve A (13) control mouth B is blocked；Control valve B (14) control mouth A passes through leakage-free ball valve B (16), liquid
Control mouth B (12) is connected with liquid controling cavity B (11), and control valve B (14) control mouth B is blocked；Leakage-free ball valve C (17) a port
It is connected with leakage-free ball valve A (15), another port is connected with oil return fuel tank (19)；Leakage-free ball valve D (18) a port
It is connected with leakage-free ball valve B (16), another port is connected with oil return fuel tank (19).
2. a kind of electric-hydraulic combined formula linear actuator as claimed in claim 1, it is characterised in that：Typical electric cylinder motion is special
Levying implementation process is, motor (2) and push rod (8) are connected firmly together by bolt, and motor (2) can drive leading screw (7) to produce rotation
Transhipment is dynamic, because inner cylinder (5), outer barrel (9) and nut (4) are connected firmly together by bolt, thus push rod (8) and outer barrel (9) it
Between just generate linear relative movement, by the current signal of controlled motor (2) can control linear motion speed and direction,
The rotation of leading screw (7) has also driven the rotation of encoder (1) simultaneously, produces the pulse signal detected for position, i.e., typical
Electric cylinder motor function；
Typical hydraulic cylinder feature implementation process is that fluid can enter outer barrel (9) and push rod (8) by hydraulic control mouthful A (6)
Between the liquid controling cavity A (10) that is formed so that driving push rod (8) retraction outer barrel (9)；Fluid can be entered by hydraulic control mouthful B (12)
The liquid controling cavity B (11) formed between inner cylinder (5) and push rod (8), so that driving push rod (8) stretches out outer barrel (9)；That is, logical
Control liquid controling cavity A (10) and liquid controling cavity B (11) oil liquid pressure and flow are crossed, the speed that push rod (8) can be controlled to move along a straight line
And direction, that is, realize typical hydraulic cylinder function.
3. based on a kind of energy-saving operation method of electric-hydraulic combined formula linear actuator described in claim 1 or 2, its feature exists
In：If being upwards positive direction, load quality is m, and oil liquid pressure is F, it is considered to equilibrium equation F=mg+ma, then by controlling fluid
Pressure F is the acceleration of controllable load, and oil liquid pressure F can be realized by the control to oil circuit, be specifically divided into four kinds of works
Operation mode：
Mode of operation is 1. as v ＞ 0, F ＞ 0, and control valve B (14) is in direct mode operation, passes through the control of adjusting control valve B (14)
Mouthful A opening degree controls the displacement of push rod (8), opens leakage-free ball valve B (16), the confession that hydraulic oil passes through control valve B (14)
Hydraulic fluid port P, control valve B (14) control mouth A, leakage-free ball valve B (16), hydraulic control mouthful B (12) enter liquid controling cavity B (11)；Open nothing
The fluid leaked in ball valve C (17), liquid controling cavity A (10) returns to oil return fuel tank by hydraulic control mouthful A (6), leakage-free ball valve C (17)
(19)；Now, it is powered to motor (2), linear actuator is in electric-hydraulic combined mode of operation；
2. mode of operation as v ＞ 0, F ＜ 0, opens leakage-free ball valve D (18), passes through hydraulic control mouthful B (12), leakage-free ball valve D
(18) from oil return fuel tank (19) repairing into liquid controling cavity B (11)；Open the fluid in leakage-free ball valve C (17), liquid controling cavity A (10)
Oil return fuel tank (19) is returned to by hydraulic control mouthful A (6), leakage-free ball valve C (17)；Motor (2) is set to be in power generation operation pattern, with storage
Energy element formation closed-loop path, electrical power storage is got up, the displacement of push rod (8) is controlled by the moment of torsion of controlled motor (2)；
3. mode of operation as v ＜ 0, F ＞ 0, opens leakage-free ball valve C (17), passes through hydraulic control mouthful A (6), leakage-free ball valve C
(17) from oil return fuel tank (19) repairing into liquid controling cavity A (10)；Open the fluid in leakage-free ball valve D (18), liquid controling cavity B (11)
Oil return fuel tank (19) is returned to by hydraulic control mouthful B (12), leakage-free ball valve D (18)；Motor (2) is set to be in power generation operation pattern, with
Energy-storage travelling wave tube formation closed-loop path, electrical power storage is got up, the displacement of push rod (8) is controlled by the moment of torsion of controlled motor (2)；
Mode of operation is 4. as v ＜ 0, F ＜ 0, and control valve A (13) is in direct mode operation, passes through the control of adjusting control valve A (13)
Mouthful A opening degree controls the displacement of push rod (8), opens leakage-free ball valve A (15), the confession that hydraulic oil passes through control valve A (13)
Hydraulic fluid port P, control valve A (13) control mouth A, leakage-free ball valve A (15), hydraulic control mouthful A (6) enter liquid controling cavity A (10)；Nothing is opened to let out
Lose valve D (18), and the fluid in liquid controling cavity B (11) returns to oil return fuel tank by hydraulic control mouthful B (12), leakage-free ball valve D (18)
(19)；Now, it is powered to motor (2), linear actuator is in electric-hydraulic combined mode of operation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510116566.5A CN104847749B (en) | 2015-03-17 | 2015-03-17 | A kind of electric-hydraulic combined formula linear actuator and its energy-saving operation method |
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| CN201510116566.5A CN104847749B (en) | 2015-03-17 | 2015-03-17 | A kind of electric-hydraulic combined formula linear actuator and its energy-saving operation method |
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| CN104847749B true CN104847749B (en) | 2017-09-05 |
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| CN105114397A (en) * | 2015-09-06 | 2015-12-02 | 哈尔滨工业大学 | Fluid artificial muscle driving and controlling system |
| CN109611418B (en) * | 2018-12-29 | 2024-04-16 | 厦门理工学院 | Oil supply system of high-speed heavy-load actuator |
| CN111092515B (en) * | 2019-12-20 | 2021-06-29 | 太原理工大学 | Integrated electromechanical-hydraulic driving and energy storage integrated actuating device |
| CN112460095B (en) * | 2020-11-30 | 2021-11-19 | 北京理工大学 | Active and passive load composite control method of electro-hydraulic composite cylinder |
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| GB2076469A (en) * | 1980-04-29 | 1981-12-02 | Secretary Industry Brit | Fluid actuated ram with position measuring device |
| JP2001295805A (en) * | 2000-04-18 | 2001-10-26 | Farukomu:Kk | Power cylinder mechanism for both screw and oil pressure |
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| DE102011115011A1 (en) * | 2011-10-06 | 2013-04-11 | Robert Bosch Gmbh | Hydraulic multi-chamber cylinder unit has piston having active surfaces which are pressurized with respect to one another, where force is applied along extension direction of piston rod, by electromagnetic force of electric motor |
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| CN104847749A (en) | 2015-08-19 |
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