CN110219843A - A kind of pump-free type hydraulic loaded and positioning device - Google Patents
A kind of pump-free type hydraulic loaded and positioning device Download PDFInfo
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- CN110219843A CN110219843A CN201910390819.6A CN201910390819A CN110219843A CN 110219843 A CN110219843 A CN 110219843A CN 201910390819 A CN201910390819 A CN 201910390819A CN 110219843 A CN110219843 A CN 110219843A
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- loading
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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
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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
- F15B15/1423—Component parts; Constructional details
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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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
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Abstract
The invention discloses a kind of pump-free type hydraulic loaded and positioning devices, belong to hydraulic loaded apparatus field.The device includes: Linear actuator, loading hydraulic cylinder, pressure-bearing cylinder, backing mechanism and processor；The output end of Linear actuator has piston push rod；Loading hydraulic cylinder includes cylinder body, piston rod and displacement sensor；Pressure-bearing cylinder has oil storage room, and oil storage room one end is provided with the piston hole of the piston push rod entrance for Linear actuator, and the other end is connected to by the first fluid pressure line with the high pressure chest of loading hydraulic cylinder；Backing mechanism includes airdraulic actuator and pneumatic supply, and the hydraulic cavities of airdraulic actuator connect the low pressure chamber of loading hydraulic cylinder by the second fluid pressure line；The atmospheric pressure cavity of airdraulic actuator connects pneumatic supply；Processor connects displacement sensor and Linear actuator, carries out closed-loop control to the displacement of piston rod.The present invention is not necessarily to hydraulic power unit, reduces the energy loss of loading system and avoids hydraulic power unit noise, and can be accurately positioned to piston rod.
Description
Technical field
The invention belongs to hydraulic loaded apparatus field, more particularly, to a kind of pump-free type hydraulic loaded and positioning device,
It is particularly suitable for having the case where high-precision requirement to loading hydraulic cylinder piston displacement, can work in loading mode, can also work
In station-keeping mode.
Background technique
Hydraulic loading device can be completed under experimental conditions to large scale equipment key load bearing component (the main Propulsion Systems of such as ship
With steering engine etc.) load simulation and performance evaluating.Its for optimizing structure design, save research and development the time, reduce experimental cost and
Equipment dependability is improved to be of great significance.
Traditional hydraulic loading device mainly uses valve control cylinder mode as executive component, by the aperture for adjusting servo valve
Come change load hydraulic cylinder inside oil liquid pressure, to obtain the desired loading force of system.Due to hydraulic valve piece itself
The influence of restriction loss, loading device capacity usage ratio is very low, and Yi Fasheng hydraulic oil superheating phenomenon reduces the stability of system
With control precision.Moreover, it is mostly using hydraulic power unit as power source, realized by controlling the opening and closing of a large amount of electrohydraulic servo valves
The rollback of loading hydraulic cylinder piston.Noise caused by the hydraulic power unit that this method uses can interfere site operation personnel to work,
Hydraulic power unit occupied space is larger simultaneously, affects the utilization efficiency of equipment.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of pump-free type hydraulic loaded and positioning
Device, it is intended that loaded using Linear actuator as pressure source drive load cylinder, and using pneumatic supply as pressure source
Drive load cylinder retracts, to realize driving and the rollback of load the cylinder piston under conditions of not using hydraulic power unit, effectively drops
The energy loss of low loading system, and the noise for avoiding hydraulic power unit operation from generating；Meanwhile by displacement sensor, processor,
Linear actuator carries out displacement closed-loop control, realizes the accurate positioning of load the cylinder piston, promotes control precision.
To achieve the above object, according to one aspect of the present invention, a kind of pump-free type hydraulic loaded and positioning dress are provided
It sets, comprising: Linear actuator, loading hydraulic cylinder, pressure-bearing cylinder, the first fluid pressure line, the second fluid pressure line, backing mechanism and processing
Device；
The output end of Linear actuator has piston push rod；
Loading hydraulic cylinder includes cylinder body, piston rod and displacement sensor, and cylinder body is divided into high pressure chest and low pressure by piston rod
Chamber；Displacement sensor is used to measure the position of piston rod.
Pressure-bearing cylinder has oil storage room, and oil storage room one end is provided with piston hole, so that the piston push rod of Linear actuator enters, separately
One end is connected by the first fluid pressure line with the high pressure chest of loading hydraulic cylinder；
Backing mechanism includes airdraulic actuator and pneumatic supply；Gas-liquid pressure is equipped with inside airdraulic actuator to convert
Airdraulic actuator is divided into hydraulic cavities and atmospheric pressure cavity by piston, gas-liquid pressure switching piston；The liquid of airdraulic actuator
Chamber is pressed to connect the low pressure chamber of loading hydraulic cylinder by the second fluid pressure line；The atmospheric pressure cavity of airdraulic actuator connects pneumatic supply；
Processor connects displacement sensor and Linear actuator, with the displacement signal that is fed back according to displacement sensor to piston
The displacement of bar carries out closed-loop control.
Further, the sectional area of the hydraulic cavities of airdraulic actuator is not more than the sectional area of atmospheric pressure cavity.
Further, the sectional area of hydraulic cavities is less than the sectional area of atmospheric pressure cavity；Gas-liquid pressure switching piston includes mutually solid
Hydraulic cavities cock body and atmospheric pressure cavity cock body even, hydraulic cavities cock body are located in hydraulic cavities, and atmospheric pressure cavity cock body is located in atmospheric pressure cavity；It is hydraulic
The cross sectional shape size of chamber cock body is identical as the section of hydraulic cavities, the cross sectional shape size of atmospheric pressure cavity cock body and the section of atmospheric pressure cavity
It is identical.
Further, including quantity is equal and one-to-one multiple loading hydraulic cylinders, the first fluid pressure line and the second liquid
Pressure pipe road；Each loading hydraulic cylinder accesses pressure-bearing cylinder and gas by corresponding first fluid pressure line and the second fluid pressure line parallel connection
Between hydraulic coupling conversion cylinder.
Further, pressure gauge, the first shut-off valve and pressure sensor are equipped on each first fluid pressure line；Processor
Pressure sensor is connected, with the pressure signal fed back according to pressure sensor, closed loop control is carried out to the pressure of the first fluid pressure line
System.
Further, each first fluid pressure line imports the first hydraulic supply line, and connects oil storage room by the first hydraulic supply line；
Each second fluid pressure line imports the second hydraulic supply line, and connects hydraulic cavities by the second hydraulic supply line；First hydraulic supply line and
It is respectively equipped with pressure gauge on two hydraulic supply lines, the second shut-off valve is additionally provided on the second hydraulic supply line.
Further, which is characterized in that further include storing oil cylinder, store the oil inlet of oil cylinder connection pressure-bearing cylinder.
Further, overflow valve is arranged in the oil outlet of pressure-bearing cylinder.
Another object of the present invention is to, it is loaded using Linear actuator as pressure source drive load cylinder, and utilize gas
Potential source retracts as pressure source drive load cylinder, to realize the driving of load the cylinder piston under conditions of not using hydraulic power unit
And retract, the noise that the energy loss of loading system is effectively reduced, and hydraulic power unit operation is avoided to generate.
To achieve the goals above, other side according to the invention provides a kind of pump-free type hydraulic loading device,
It include: Linear actuator, loading hydraulic cylinder, pressure-bearing cylinder, the first fluid pressure line, the second fluid pressure line and backing mechanism；
The output end of Linear actuator has piston push rod；
Loading hydraulic cylinder includes cylinder body and piston rod, and cylinder body is divided into high pressure chest and low pressure chamber by piston rod；
Pressure-bearing cylinder has oil storage room, and oil storage room one end is provided with piston hole, so that the piston push rod of Linear actuator enters, separately
One end is connected by the first fluid pressure line with the high pressure chest of loading hydraulic cylinder；
Backing mechanism includes airdraulic actuator and pneumatic supply；Gas-liquid pressure is equipped with inside airdraulic actuator to convert
Airdraulic actuator is divided into hydraulic cavities and atmospheric pressure cavity by piston, gas-liquid pressure switching piston；The liquid of airdraulic actuator
Chamber is pressed to connect the low pressure chamber of loading hydraulic cylinder by the second fluid pressure line；The atmospheric pressure cavity of airdraulic actuator connects pneumatic supply.
Further, the sectional area of the hydraulic cavities of airdraulic actuator is not more than the sectional area of atmospheric pressure cavity；Wherein, work as liquid
When the sectional area of chamber being pressed to be less than the sectional area of atmospheric pressure cavity:
Gas-liquid pressure switching piston includes mutually connected hydraulic cavities cock body and atmospheric pressure cavity cock body, and hydraulic cavities cock body is located at liquid
Press intracavitary, atmospheric pressure cavity cock body is located in atmospheric pressure cavity；The cross sectional shape size of hydraulic cavities cock body is identical as the section of hydraulic cavities, air pressure
The cross sectional shape size of chamber cock body is identical as the section of atmospheric pressure cavity.
In general, the above technical scheme conceived by the present invention compared with prior art, can obtain following beneficial to effect
Fruit:
1) using Linear actuator and pressure-bearing cylinder as pressure amplifier element drive load hydraulic cylinder, while gas is utilized
Potential source drive load hydraulic cylinder resets, and avoids the electro-hydraulic loading device of conventional valve control such as hydraulic power unit etc. and is easy to produce asking for noise
Topic；Displacement closed-loop feedback-control module is formed by processor, displacement sensor and linear actuating device, utilizes displacement sensing
The piston push rod displacement of the real-time linear adjustment driving device of data of device feedback, to realize to loading hydraulic cylinder piston displacement
It adjusts and is accurately positioned in real time, there is high reliability.
2) due to there's almost no restriction loss in hydraulic circuit of the invention, the loss in energy transfer process mainly comes
Derived from machine driving, there is higher energy efficiency compared with traditional electro-hydraulic loading device of valve control；
3) backing mechanism of the invention utilizes the compressibility of gas, can be by when loading hydraulic cylinder executes load work
Free Compression does not interfere its normal operation；And when needing to be reset, it can directly utilize the energy because of gas compression storage to push
Loading hydraulic cylinder resets, not only without using hydraulic power unit, additionally it is possible to and it is energy saving, improve loading device space utilization rate；
4) present invention can support that more loading hydraulic cylinders are in parallel, and by controlling the opening and closing of each first shut-off valve, realizing will
Different loading hydraulic cylinders accesses oil circuit, can be independently controlled to loading hydraulic cylinder in parallel or parallel control, operation are clever
It is living；
5) present invention can pass through processor, pressure sensor and linear actuating device decomposition pressure closed loop feedback control
Mechanism is displaced using the piston push rod of the real-time linear adjustment driving device of data of pressure sensor feedback, to realize to adding
The real-time adjusting and accurate control for carrying power, have high reliability.
Detailed description of the invention
Fig. 1 is the systematic schematic diagram of the pump-free type hydraulic loading device of the preferred embodiment of the present invention；
Fig. 2 is Linear actuator and pressure-bearing cylinder connection schematic diagram in Fig. 1；
Fig. 3 is the pressure-bearing cylinder schematic cross-sectional view in Fig. 1；
Fig. 4 is the sectional structure schematic diagram of the loading hydraulic cylinder in Fig. 1；
Fig. 5 is the sectional structure schematic diagram of the airdraulic actuator in Fig. 1；
Fig. 6 is the sectional structure schematic diagram of the airdraulic actuator of second embodiment of the invention.
In all the appended drawings, identical appended drawing reference is used to denote the same element or structure, in which:
1- Linear actuator, 2- store oil cylinder, 3- pressure-bearing cylinder, 4- pressure gauge, the first shut-off valve of 5-, 6- pressure sensor, 7-
Displacement sensor, 8- loading hydraulic cylinder, 9- backing mechanism, 10- airdraulic actuator, 11- pneumatic supply, 12- third shut-off valve,
13- overflow valve, 14- oiling control valve group, 15- pressure-bearing cylinder oil outlet, 16- pressure-bearing cylinder drive end bearing bracket, 17- oil storage room, 18- pressure-bearing cylinder
Rear end cap, 19- piston push rod, 20- electric cylinder, 21- retarder, 22- servo motor, 23- axle envelope block, 24- oil inlet, 25- overflow
Head piece connector, 26- delivery connection, 27- high pressure chest, 28- piston rod, 29- low pressure chamber, 30- hydraulic cavities, the conversion of 31- gas-liquid pressure
Piston, 32- atmospheric pressure cavity, the first fluid pressure line of 33-, the second fluid pressure line of 34-, the second shut-off valve of 35-.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
The principle of the invention lies in by the volume of hydraulic oil in forcibly changing closed container to adjust the pressure inside container
Power.The present invention achievees the purpose that load with the inverse relation of aforesaid liquid pressure and volume.Specific method is: linear to drive
The piston push rod 19 of dynamic device 1 is entered inside pressure-bearing cylinder 3 by sealing ring, by the flexible change pressure-bearing cylinder 3 of piston push rod 19
Portion closes the volume of oil liquid, generates desired on-load pressure according to the inverse relation of oil liquid pressure and volume, and push load liquid
The piston rod 28 of cylinder pressure 8 is to export specified loading force.
As shown in Figure 1, the pump-free type hydraulic loading device of the preferred embodiment of the present invention includes: Linear actuator 1, stores oil cylinder
2, pressure-bearing cylinder 3, pressure gauge 4, shut-off valve 5, pressure sensor 6, displacement sensor 7, loading hydraulic cylinder 8, backing mechanism 9, gas-liquid
Pressure conversion cylinder 10, pneumatic supply 11, third shut-off valve 12, overflow valve 13, oiling control valve group 14, the first fluid pressure line 33,
Two fluid pressure lines 34 and the second shut-off valve 35.
Wherein, Linear actuator 1 connects pressure-bearing cylinder 3, stores oil cylinder 2 and is used to pass through oil filling pipeline to 3 oiling of pressure-bearing cylinder, oiling
Pipeline is equipped with third shut-off valve 12.Overflow valve 13 connects pressure-bearing cylinder 3 and stores oil cylinder 2, stores oil cylinder 2 by gas-powered oiling, note
Oil control valve group 14 includes two solenoid valves and a hand-operated valve, for the electric or hand gas that controls to the piston for storing oil cylinder 2
Pressure realizes oiling, and the gas source for storing oil cylinder 2 is omitted in figure, and conventional pressurized gas source can be used.8 both ends of loading hydraulic cylinder point
Not Tong Guo the first fluid pressure line 33, the second fluid pressure line 34 connect pressure-bearing cylinder 3 and backing mechanism 9 left end.The right side of backing mechanism 9
End connection pneumatic supply 11.
Preferably, pneumatic supply 11 can be industrial gas cylinder, ideal gas source or accumulator, so that stable gas can be provided
Pressure also can carry out accumulation of energy using gas compression characteristics during loading.Also the similar confession for storing oil cylinder 2 and using can be directly used
Gas mode is directly supplied when resetting.
Please refer to Fig. 1~5, the Linear actuator 1 of the present embodiment include piston push rod 19, electric cylinder 20, retarder 21 with
And servo motor 22.Piston push rod 19 is the build-in components of electric cylinder 20, and electric cylinder 20 can directly buy existing product.Using
Servo motor 22 can accurately control the amount of feeding of piston push rod 19, to accurately control hydraulic and loading hydraulic cylinder 8 add
Carry the position of power and piston rod 28.In other embodiments, piston push rod 19 can be mounted on arbitrary line feed mechanism
Driven, such as be mounted on the mover of ball-screw, specific constructive form is unlimited, can straight reciprocating motion, realization holds
Pressurization, the pressure release of pressure cylinder 3.Loading hydraulic cylinder 8 includes cylinder body and piston rod 28, and cylinder body is divided into high pressure chest by piston rod 28
27 and low pressure chamber 29, as shown in Figure 4.
Pressure-bearing cylinder 3 has oil storage room 17, and 17 one end of oil storage room is provided with piston hole, for the piston push rod of Linear actuator 1
19 enter, and piston push rod 19 is tightly connected in a manner of axle envelope with pressure-bearing tube rear end lid 18 axle envelope block 23, and can be in axial direction
Freely move back and forth.The other end of oil storage room 17 is connected by the first fluid pressure line 33 with the high pressure chest 27 of loading hydraulic cylinder 8.
Pressure-bearing cylinder 3 further includes pressure-bearing cylinder oil outlet 15, pressure-bearing cylinder drive end bearing bracket 16, oil inlet 24, overflow port connector 25 and delivery connection
26.Pressure-bearing cylinder oil outlet 15 connects the first fluid pressure line 33 by delivery connection 26, connects overflow valve by overflow port connector 25
13.Oil storage room 17 connects oil inlet pipe by oil inlet 24 and stores oil cylinder 2.
Backing mechanism 9 includes airdraulic actuator 10 and pneumatic supply 11.Gas-liquid is equipped with inside airdraulic actuator 10
Airdraulic actuator 11 is divided into hydraulic cavities 30 and atmospheric pressure cavity 32 by pressure conversion piston 31, gas-liquid pressure switching piston 31.
The hydraulic cavities 30 of airdraulic actuator 10 connect the low pressure chamber 29 of loading hydraulic cylinder 8 by the second fluid pressure line 34.Gas fluid pressure
The atmospheric pressure cavity 32 of power conversion cylinder 10 connects pneumatic supply 11, and pneumatic supply 11 is for providing stable air pressure.
Preferably, in order to increase the pressure in hydraulic cavities 30, so as to using the lesser pneumatic supply 11 of pressure provide compared with
Big restoring force, the sectional area of hydraulic cavities 30 are less than the sectional area of atmospheric pressure cavity 32.Specifically, as shown in figure 5, gas-liquid pressure is converted
Piston 31 includes mutually connected hydraulic cavities cock body and atmospheric pressure cavity cock body, and hydraulic cavities cock body is located in hydraulic cavities 30, atmospheric pressure cavity plug
Body is located in atmospheric pressure cavity 32.The cross sectional shape size of hydraulic cavities cock body is identical as the section of hydraulic cavities 30, and atmospheric pressure cavity cock body is cut
Face geomery is identical as the section of atmospheric pressure cavity 32.The ratio of hydraulic cavities 30 and atmospheric pressure cavity 32 determines pressure conversion multiple.
Preferably, the present embodiment uses multi-cylinder parallel, the scheme of independent control.Specifically, as shown in Figure 1, the present embodiment
Equal provided with quantity and one-to-one multiple loading hydraulic cylinders 8, the first fluid pressure line 33 and the second fluid pressure line 34；Respectively plus
Carrier fluid cylinder pressure 8 passes through corresponding first fluid pressure line 33 and the access pressure-bearing cylinder 3 in parallel of the second fluid pressure line 34 and Gas fluid pressure
Between power conversion cylinder 10.Pressure gauge 4, the first shut-off valve 5 and pressure sensor 6 are equipped on each first fluid pressure line 33.Respectively
First fluid pressure line 33 imports the first hydraulic supply line, and connects oil storage room 17 by the first hydraulic supply line；Each second fluid pressure line
34 import the second hydraulic supply line, and connect hydraulic cavities 30 by the second hydraulic supply line；First hydraulic supply line and the second hydraulic supply line
On be respectively equipped with pressure gauge 4, the second shut-off valve 35 is additionally provided on the second hydraulic supply line.Each loading hydraulic cylinder 8 is equipped with displacement
Sensor 7, for measuring the position of piston rod 8.Processor connection displacement sensor 7 (not shown) and Linear actuator 1, composition
It is displaced closed loop feedback control mechanism, for accurately controlling the amount of feeding of piston push rod 19 in Linear actuator 1, to accurately control
The position of the piston rod 28 of loading hydraulic cylinder 8 is realized and is accurately positioned.Processor connection pressure sensor 6 (not shown) and linear
Driver 1, decomposition pressure closed loop feedback control mechanism, for accurately controlling the amount of feeding of piston push rod 19 in Linear actuator 1,
To accurately control the loading force of loading hydraulic cylinder 8.
In the following, introducing the course of work and working principle of the present embodiment so that the pneumatic supply 11 used is industrial gas cylinder as an example:
Before being loaded, oil liquid need to be injected to pressure-bearing cylinder 3.Open oiling control valve group 14 hand-operated valve or solenoid valve with
And the third shut-off valve 12 on oil filling pipeline, it is pushed using air pressure and stores the piston in oil cylinder 2 for oil liquid injection pressure-bearing cylinder 3
Oil storage room 17.When the on-load pressure of pressure-bearing cylinder 3 is excessively high, overflow is opened by overflow valve 13, is connected with oil cylinder 2 is stored, prevents line
There are overload situations in property driver 1.After oiling, third shut-off valve 12 is closed.
It when being loaded, is required according to real work, opens the second shut-off valve 35 and any first shut-off valve 5, so
The piston push rod 19 that starting servo motor 22 controls electric cylinder 1 afterwards generates specified displacement, thus the storage of forcibly changing pressure-bearing cylinder 3
17 internal oil volume of grease chamber, and then change its internal pressure.When load, servo motor 22 is rotated forward, and piston push rod 19 extends, will
High pressure oil in pressure-bearing cylinder 3 injects the high pressure chest 27 of corresponding loading hydraulic cylinder 8, and piston rod 28 is pushed to generate corresponding load
Power.At this point, the gas in the atmospheric pressure cavity 32 of airdraulic actuator 10 is by compression and back industrial gas cylinder.Further, since gas by
The reaction force of pressure can make the movement of piston rod 28 more steady.
Preferably, the present invention can both work in station-keeping mode, can also work in loading mode:
It, during loading can be electronic to inputting by the feedback signal of displacement sensor 7 for positioning operating mode
The control amount of cylinder 1 is modified, and realizes the accurate control of the displacement to the piston rod 28 of loading hydraulic cylinder 8；
It, during loading can be electronic to inputting by the feedback signal of pressure sensor 6 for loading operating mode
The control amount of cylinder 1 is modified, and realizes the accurate control of the loading force to the piston rod 28 of loading hydraulic cylinder 8.
The present invention remains unchanged after can reaching a certain level on-load pressure.Concrete operations are, after being loaded into specified force, close
Servo motor 22 is closed or suspended, and closes the first shut-off valve 5 and the second shut-off valve 35.At this point, electric cylinder 1 is without input, it is living
Plug push rod 19 does not generate movement, and the oil liquid in the high pressure chest 27 of loading hydraulic cylinder 8 is isolated from the outside world, the pressure kept constant.
After load, using gas compressibility principle, the rollback of 8 piston rod of loading hydraulic cylinder is realized.Specifically, add
After load, the first shut-off valve 5 and the second shut-off valve 35 are opened, processor controls servo motor 22 and inverts, driving electric cylinder 1
Piston push rod 19 retracts, and 3 inner cavity oil liquid of pressure-bearing cylinder restores the initial pressure before load.Meanwhile the liquid of airdraulic actuator 10
30 pressure release of chamber is pressed, the gas in industrial gas cylinder re-fills in the atmospheric pressure cavity of airdraulic actuator 10, and gas-liquid pressure is pushed to turn
It changes piston 31 and restores initial position, and the synchronous oil liquid pushed in hydraulic cavities 30 injects loading hydraulic cylinder through the second fluid pressure line 34
8 low pressure chamber 29 pushes the piston push rod 19 of loading hydraulic cylinder 8 to return back to initial position.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of pump-free type hydraulic loaded and positioning device characterized by comprising Linear actuator (1), loading hydraulic cylinder
(8), pressure-bearing cylinder (3), the first fluid pressure line (34), the second fluid pressure line (35), backing mechanism (9) and processor；
The output end of Linear actuator (1) has piston push rod (19)；
Loading hydraulic cylinder (8) includes cylinder body, piston rod (28) and displacement sensor (7), and cylinder body is divided into height by piston rod (28)
Press chamber (27) and low pressure chamber (29)；Displacement sensor (7) is used to measure the position of piston rod (8)；
Pressure-bearing cylinder (3) has oil storage room (17), and oil storage room (17) one end is provided with piston hole, for the piston of Linear actuator (1)
Push rod (19) enters, and the other end is connected by the first fluid pressure line (33) with the high pressure chest (27) of loading hydraulic cylinder (8)；
Backing mechanism (9) includes airdraulic actuator (10) and pneumatic supply (11)；It is equipped with inside airdraulic actuator (10)
Airdraulic actuator (11) is divided into hydraulic cavities (30) by gas-liquid pressure switching piston (31), gas-liquid pressure switching piston (31)
With atmospheric pressure cavity (32)；The hydraulic cavities (30) of airdraulic actuator (10) connect loading hydraulic cylinder by the second fluid pressure line (34)
(8) low pressure chamber (29)；The atmospheric pressure cavity (32) of airdraulic actuator (10) connects pneumatic supply (11)；
Processor connects displacement sensor (7) and Linear actuator (1), with the displacement signal fed back according to displacement sensor (7)
Closed-loop control is carried out to the displacement of piston rod (8).
2. a kind of pump-free type hydraulic loaded as described in claim 1 and positioning device, which is characterized in that airdraulic actuator
(10) sectional area of hydraulic cavities (30) is not more than the sectional area of atmospheric pressure cavity (32).
3. a kind of pump-free type hydraulic loaded as claimed in claim 2 and positioning device, which is characterized in that hydraulic cavities (30) are cut
Area is less than the sectional area of atmospheric pressure cavity (32)；Gas-liquid pressure switching piston (31) includes mutually connected hydraulic cavities cock body and air pressure
Chamber cock body, hydraulic cavities cock body are located in hydraulic cavities (30), and atmospheric pressure cavity cock body is located in atmospheric pressure cavity (32)；The section of hydraulic cavities cock body
Geomery is identical as the section of hydraulic cavities (30), the cross sectional shape size and the section phase of atmospheric pressure cavity (32) of atmospheric pressure cavity cock body
Together.
4. a kind of pump-free type hydraulic loaded and positioning device as described in claims 1 to 3 any one, which is characterized in that packet
Include equal quantity and one-to-one multiple loading hydraulic cylinders (8), the first fluid pressure line (33) and the second fluid pressure line (34)；Respectively
Loading hydraulic cylinder (8) passes through corresponding first fluid pressure line (33) and the second fluid pressure line (34) access pressure-bearing cylinder in parallel
(3) between airdraulic actuator (10).
5. a kind of pump-free type hydraulic loaded as claimed in claim 4 and positioning device, which is characterized in that each first hydraulic tube
Pressure gauge (4), the first shut-off valve (5) and pressure sensor (6) are equipped on road (33)；Processor connects pressure sensor (6),
With the pressure signal fed back according to pressure sensor (6), closed-loop control is carried out to the pressure of the first fluid pressure line (33).
6. a kind of pump-free type hydraulic loaded as claimed in claim 5 and positioning device, which is characterized in that each first fluid pressure line
(33) the first hydraulic supply line is imported, and passes through the first hydraulic supply line connection oil storage room (17)；Each second fluid pressure line (34) imports
Second hydraulic supply line, and pass through the second hydraulic supply line connection hydraulic cavities (30)；Divide on first hydraulic supply line and the second hydraulic supply line
Not She You pressure gauge (4), be additionally provided with the second shut-off valve (35) on the second hydraulic supply line.
7. a kind of pump-free type hydraulic loaded and positioning device as described in claims 1 to 3 any one, which is characterized in that also
Including storing oil cylinder (2), the oil inlet of oil cylinder (2) connection pressure-bearing cylinder (3) is stored.
8. a kind of pump-free type hydraulic loaded and positioning device as described in claims 1 to 3 any one, which is characterized in that hold
Overflow valve (13) are arranged in the oil outlet of pressure cylinder (3).
9. a kind of pump-free type hydraulic loading device characterized by comprising Linear actuator (1), loading hydraulic cylinder (8), pressure-bearing
Cylinder (3), the first fluid pressure line (34), the second fluid pressure line (35) and backing mechanism (9)；
The output end of Linear actuator (1) has piston push rod (19)；
Loading hydraulic cylinder (8) includes cylinder body and piston rod (28), and cylinder body is divided into high pressure chest (27) and low pressure by piston rod (28)
Chamber (29)；
Pressure-bearing cylinder (3) has oil storage room (17), and oil storage room (17) one end is provided with piston hole, for the piston of Linear actuator (1)
Push rod (19) enters, and the other end is connected by the first fluid pressure line (33) with the high pressure chest (27) of loading hydraulic cylinder (8)；
Backing mechanism (9) includes airdraulic actuator (10) and pneumatic supply (11)；It is equipped with inside airdraulic actuator (10)
Airdraulic actuator (11) is divided into hydraulic cavities (30) by gas-liquid pressure switching piston (31), gas-liquid pressure switching piston (31)
With atmospheric pressure cavity (32)；The hydraulic cavities (30) of airdraulic actuator (10) connect loading hydraulic cylinder by the second fluid pressure line (34)
(8) low pressure chamber (29)；The atmospheric pressure cavity (32) of airdraulic actuator (10) connects pneumatic supply (11).
10. a kind of pump-free type hydraulic loading device as claimed in claim 9, which is characterized in that airdraulic actuator (10)
Hydraulic cavities (30) sectional area be not more than atmospheric pressure cavity (32) sectional area；Wherein, when the sectional area of hydraulic cavities (30) is less than gas
When pressing the sectional area of chamber (32):
Gas-liquid pressure switching piston (31) includes mutually connected hydraulic cavities cock body and atmospheric pressure cavity cock body, and hydraulic cavities cock body is located at liquid
It presses in chamber (30), atmospheric pressure cavity cock body is located in atmospheric pressure cavity (32)；The cross sectional shape size of hydraulic cavities cock body and hydraulic cavities (30)
Section is identical, and the cross sectional shape size of atmospheric pressure cavity cock body is identical as the section of atmospheric pressure cavity (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985456A (en) * | 2019-12-31 | 2020-04-10 | 中核武汉核电运行技术股份有限公司 | Gas-liquid combined rotary motion structure |
| CN114962387A (en) * | 2021-02-26 | 2022-08-30 | 西北核技术研究所 | Hydraulic displacement amplifier and hydraulic displacement amplification low-frequency sound wave transmitting device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030029325A1 (en) * | 2001-07-02 | 2003-02-13 | Jorg Dantlgraber | Drive device for a movable part, especially a mold closure device for an injection molding machine, and method for operating such a drive device |
| CN1821589A (en) * | 2006-03-16 | 2006-08-23 | 靖江宝骊叉车有限公司 | Double action cylinder loading test device |
| CN201225342Y (en) * | 2008-07-14 | 2009-04-22 | 上海建设路桥机械设备有限公司 | Hydraulic device |
| US20100089063A1 (en) * | 2008-04-09 | 2010-04-15 | Sustainx, Inc. | Systems and Methods for Energy Storage and Recovery Using Rapid Isothermal Gas Expansion and Compression |
| CN201568393U (en) * | 2009-04-25 | 2010-09-01 | 孙家茂 | Hydraulic system without pump |
| KR20130114863A (en) * | 2012-04-10 | 2013-10-21 | 현대중공업 주식회사 | Electro hydraulic system for electric excavator |
-
2019
- 2019-05-10 CN CN201910390819.6A patent/CN110219843B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030029325A1 (en) * | 2001-07-02 | 2003-02-13 | Jorg Dantlgraber | Drive device for a movable part, especially a mold closure device for an injection molding machine, and method for operating such a drive device |
| CN1821589A (en) * | 2006-03-16 | 2006-08-23 | 靖江宝骊叉车有限公司 | Double action cylinder loading test device |
| US20100089063A1 (en) * | 2008-04-09 | 2010-04-15 | Sustainx, Inc. | Systems and Methods for Energy Storage and Recovery Using Rapid Isothermal Gas Expansion and Compression |
| CN201225342Y (en) * | 2008-07-14 | 2009-04-22 | 上海建设路桥机械设备有限公司 | Hydraulic device |
| CN201568393U (en) * | 2009-04-25 | 2010-09-01 | 孙家茂 | Hydraulic system without pump |
| KR20130114863A (en) * | 2012-04-10 | 2013-10-21 | 현대중공업 주식회사 | Electro hydraulic system for electric excavator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985456A (en) * | 2019-12-31 | 2020-04-10 | 中核武汉核电运行技术股份有限公司 | Gas-liquid combined rotary motion structure |
| CN114962387A (en) * | 2021-02-26 | 2022-08-30 | 西北核技术研究所 | Hydraulic displacement amplifier and hydraulic displacement amplification low-frequency sound wave transmitting device |
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| Publication number | Publication date |
|---|---|
| CN110219843B (en) | 2020-08-14 |
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