CN105065375B - Electro-hydraulic servo pressure device - Google Patents
Electro-hydraulic servo pressure device Download PDFInfo
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- CN105065375B CN105065375B CN201510556899.XA CN201510556899A CN105065375B CN 105065375 B CN105065375 B CN 105065375B CN 201510556899 A CN201510556899 A CN 201510556899A CN 105065375 B CN105065375 B CN 105065375B
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- oil cylinder
- plunger
- electro
- leading screw
- piston
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- 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
Abstract
The invention relates to an electro-hydraulic servo pressure device. The problems that when an existing workpiece pressurizing device is used for pressurizing a workpiece, the pressure magnitude cannot be adjusted, the feeding force adjustment precision cannot be ensured, and the workpiece and the pressurizing device are likely to be damaged if the pressurizing force is too large are solved. An output shaft of a servo motor is connected with one end of a lead screw through a speed reducer. The other end of the lead screw is inserted into a plunger. A nut is installed on the lead screw and fixedly installed on the plunger. A first oil cylinder is communicated with a second oil cylinder through an oil pipe. A piston is arranged in the second oil cylinder. A pressure sensor is electrically connected with an oil chamber of the second oil cylinder. A displacement sensor is electrically connected with a piston rod of the piston. The signal output ends of the pressure sensor and the displacement sensor are electrically connected with the signal input end of a controller. The signal output end of the controller is electrically connected with the signal input end of the servo motor. The electro-hydraulic servo pressure device is used for precisely controlling pressure.
Description
Technical field
The present invention relates to a kind of pressure apparatus, and in particular to a kind of electro-hydraulic servo pressure apparatus.
Background technology
At present, to workpiece imposed load, from the point of view of control aspect, one kind is opened loop control, and one kind is closed loop control, open loop
Control workpiece does not feed back force signal, and closed loop control workpiece feedback force signal can adjust the size of reinforcing, and at present main application is
The mode of opened loop control, when applying power is excessive, workpiece and pressue device are all fragile；When applying power is too small, it is impossible to complete
Requirement to workpiece morphologic change, is not easy to ensure product quality, closed loop control now mainly in terms of hydraulic system has application, adopts
After collecting pressure signal, the opening degree of regulating valve is controlled by flow, and this method precision is not high, and complex structure, easily
Break down, it is impossible to meet use requirement.
The content of the invention
The present invention for solve it is existing to workpiece pressue device when to workpiece applying power, one is that the size of power can not be carried out
Adjustment, two is the Adjustment precision it cannot be guaranteed that centripetal force, if the power of pressurization is excessive, workpiece and pressue device is flimsy asks
Topic, and then propose a kind of electro-hydraulic servo pressure apparatus.
The present invention is adopted the technical scheme that to solve the above problems：A kind of electro-hydraulic servo pressure apparatus includes servo electricity
Machine, decelerator, the first oil cylinder, plunger, leading screw, screw, the second oil cylinder, piston, oil pipe, controller, pressure transducer, displacement are passed
Sensor, sealing shroud, at least one guide pad and at least one guiding rail, the output shaft of servomotor is by decelerator and leading screw
One end connection, the other end of leading screw is inserted in plunger, and screw is arranged on leading screw, and screw is connected with threads of lead screw, silk
Mother is packed on plunger, and leading screw and plunger are arranged in the first oil cylinder, are fixed with the side wall away from the plunger at one end of leading screw
At least one guide pad, is provided with least one guiding rail on the medial wall of the first oil cylinder, sliding in each guiding rail sets
A guide pad is equipped with, sealing shroud is provided between the medial wall of the first oil cylinder and the lateral wall of plunger, the first oil cylinder is by oil
Pipe is connected with the second oil cylinder, and piston is arranged in the second oil cylinder, and pressure transducer is electrically connected with the grease chamber of the second oil cylinder, and displacement is passed
Sensor is electrically connected with the piston rod of piston, and the signal output part of pressure transducer and displacement transducer is defeated with the signal of controller
Enter end electrical connection, the signal output part of controller is electrically connected with the signal input part of servomotor.
The invention has the beneficial effects as follows：
First, it is of the invention compared with the pressue device of existing opened loop control, it is possible to achieve the pressure and displacement to workpiece is carried out
Closed loop control：Operationally, in the first oil cylinder built with hydraulic oil, servomotor is connected by decelerator with leading screw, screw peace
It is mounted on leading screw, and screw is connected with threads of lead screw, screw is affixed with plunger, and leading screw is rotated under the drive of servomotor, silk
The dynamic plunger of master tape carries out translation, when plunger is extruded the hydraulic oil in the first oil cylinder grease chamber, enters hydraulic oil ejection
Second oil cylinder, so that piston is moved forward, so as to complete the process to workpiece pressurization.When piston contact is to workpiece, second
In-oil cylinder oil pressure is raised, and the pressure signal for receiving is fed back to controller by pressure transducer, and controller feeds back to signal
Servomotor, the difference of pressure according to required for workpiece, and to workpiece pressurization each during to the control of centripetal force and
Adjustment precision is required, to be adjusted to the pulsed quantity that servomotor is exported, so as to form pressure closed loop control.Can also basis
The difference of displacement required for workpiece, to be adjusted to the pulsed quantity that servomotor is exported, so as to pass through displacement transducer shape
Into displacement closed loop control.
2nd, the present invention can realize the precise control to pressure adjustment relative to existing pressure apparatus, and it is right to pass through
Realizing the slow pressure to workpiece, workpiece is subject to acting on for lasting power, Bu Huizao for the micro adjustment of servomotor pulsed quantity
Into the damage of workpiece and device itself.
Description of the drawings
Fig. 1 is the structural representation of the present invention, and Fig. 2 is the circuit control schematic diagram of the present invention.
Specific embodiment
Specific embodiment one：With reference to Fig. 1 and Fig. 2 explanation present embodiments, a kind of electro-hydraulic servo described in present embodiment
Pressure apparatus includes servomotor 1, decelerator 2, the first oil cylinder 3, plunger 4, leading screw 5, screw 6, the second oil cylinder 7, piston 8, oil
Pipe 11, controller 12, pressure transducer 13, displacement transducer 14, sealing shroud 20, at least one guide pad 9 and at least one are led
Direction guiding rail 10, the output shaft of servomotor 1 is connected by decelerator 2 with one end of leading screw 5, and the other end of leading screw 5 is inserted into post
In plug 4, screw 6 is arranged on leading screw 5, and screw 6 is threadedly coupled with leading screw 5, and screw 6 is packed on plunger 4, leading screw 5 and post
Plug 4 is arranged in the first oil cylinder 3, is fixed with least one guide pad 9 on the side wall away from one end of plunger 4 of leading screw 5, and first
At least one guiding rail 10 is provided with the medial wall of oil cylinder 3, sliding in each guiding rail 10 is provided with a guide pad
9, it is provided with sealing shroud 20 between the medial wall of the first oil cylinder 3 and the lateral wall of plunger 4, the first oil cylinder 3 is by oil pipe 11 and the
Two oil cylinders 7 are connected, and piston 8 is arranged in the second oil cylinder 7, and pressure transducer 13 is electrically connected with the grease chamber of the second oil cylinder 7, and displacement is passed
Sensor 14 is electrically connected with the piston rod of piston 8, and the signal output part of pressure transducer 13 and displacement transducer 14 is and controller
12 signal input part electrical connection, the signal output part of controller 12 is electrically connected with the signal input part of servomotor 1.
In the present invention, sealing shroud 20 play a part of seal and be oriented to so that plunger 4 can horizontal direction movement, will not
Produce upper and lower play.
The long enough of oil pipe 11 so that the first oil cylinder 3 and the second oil cylinder 7 can separate far, to place in the second oil cylinder 7 portion
Part is few, lightweight, can be placed on workpiece 19, or is located in the vicinity of workpiece 19.
Controller 12 is communicated by control module for servo motor, servomotor drive module, signal acquisition module with host computer
Module composition, host computer is connected by bus (including USB, RS232, CAN etc.) with controller 12, realizes that system controls mould
Formula configuration, parameter adjustment, status monitoring and data acquisition.
Specific embodiment two：Present embodiment, a kind of electro-hydraulic servo pressure dress described in present embodiment are illustrated with reference to Fig. 1
Put and also include signal generating element 15 and two position switch 16, signal generating element 15 is arranged on the lateral wall of plunger 4, the
A position switch 16 is each provided with one oil cylinder 3 along the both ends of the length direction of the first oil cylinder 3.It is arranged such, two positions
Extreme position safety switch before and after switching 16 respectively, plunger 4 moves to the front end of the first oil cylinder 3, and position switch 16 receives letter
Number generating device 15 sends command signal makes its plunger 4 stop moving forward；When plunger 4 is moved to the rear end of the first oil cylinder 3,
Position switch 16 receives signal generating element 15 and sends command signal and makes its plunger 4 stop being moved rearwards by, so as to realize plunger 4
Stroke Control, and then ensure that electro-hydraulic servo pressure apparatus is not damaged by plunger 4 beyond stroke.Other compositions and annexation
It is identical with specific embodiment one.
Specific embodiment three：Present embodiment, a kind of electro-hydraulic servo pressure dress described in present embodiment are illustrated with reference to Fig. 1
Put and also include spring 17, spring 17 is arranged on the piston rod of piston 8.Being disposed to of spring 17 makes piston 8 reset.Other
Composition is identical with annexation with specific embodiment one or two.
Specific embodiment four：Present embodiment, a kind of electro-hydraulic servo pressure dress described in present embodiment are illustrated with reference to Fig. 1
Put and also include bearing 18, leading screw 5 is arranged in the first oil cylinder 3 by bearing 18.The setting of bearing 18, plays and supports leading screw 5
Effect, while so that the rotation of leading screw 5 is more steady, without noise.Other compositions and annexation and specific embodiment three
It is identical.
Specific embodiment five：Present embodiment, a kind of electro-hydraulic servo pressure dress described in present embodiment are illustrated with reference to Fig. 1
Put and also include rubber blanket 21, rubber blanket 21 is arranged on the lateral surface of piston 8.It is arranged such, if the pulsed quantity of servomotor 1
Increase, because liquid can not be compressed, power can produce a unexpected increase state, and rubber blanket 21 can play cushion effect
Effect, it is ensured that stable variable condition between the pulsed quantity and plus-pressure of servomotor 1.Other compositions and annexation and tool
Body embodiment four is identical.
Operation principle
The output shaft of servomotor 1 is connected by decelerator 2 with one end of leading screw 5, and leading screw 5 is supported on by bearing 18
On one oil cylinder 3, screw 6 is arranged on leading screw 5, and screw 6 is threadedly coupled with leading screw 5, and screw 6 is fixed together with plunger 4, far
At least one guide pad 9 is fixed with the side wall of one end of plunger 4 of leading screw 5, is provided with least on the medial wall of the first oil cylinder 3
Slide in one guiding rail 10, each guiding rail 10 and be provided with a guide pad 9, leading screw 5 is under the drive of servomotor 1
Rotate, screw 6 drive plunger 4 carry out translation, the first oil cylinder 3 built with hydraulic oil, when in 4 pairs of grease chambers of the first oil cylinder 3 of plunger
When hydraulic oil is extruded, hydraulic oil ejection is set to enter the second oil cylinder 7, so that piston 8 is moved forward, so as to complete to workpiece
The process of pressurization.Pressure transducer 13 is electrically connected with the grease chamber of the second oil cylinder 7, and displacement transducer 14 is electric with the piston rod of piston 8
The signal output part of connection, pressure transducer 13 and displacement transducer 14 is electrically connected with the signal input part of controller 12, is controlled
The signal output part of device processed 12 is electrically connected with the signal input part of servomotor 1.When piston 8 touches workpiece 19, second is oily
Oil pressure in cylinder 7 is raised, and pressure signal is fed back to controller 12 by pressure transducer 13, and signal is fed back to servo by controller 12
Motor 1, the difference of pressure according to required for workpiece 19, to be adjusted to the pulsed quantity of servomotor 1, is closed so as to form pressure
Ring is controlled.Can also according to required for workpiece 19 displacement difference, to be adjusted to the pulsed quantity of servomotor 1, so as to
Displacement closed loop control is formed by displacement transducer 14.
When plunger 4 is moved rearwards by, spring 17 promotes piston 8 to return to original position.
According to different situations, can select to be the function of pressurizeing workpiece or reduce pressure, specific computing formula is as follows：
Wherein：P1 is the power that leading screw 5 promotes plunger 4, and F1 is the area of plunger 4, and F2 is the face of piston 8
Product, P2 is the power that piston 8 is applied on workpiece.
There is the stressed function of increasing when F2 is more than F1, otherwise have the function of reducing pressure.
Claims (3)
1. a kind of a kind of electro-hydraulic servo pressure apparatus, electro-hydraulic servo pressure apparatus includes servomotor (1), the first oil cylinder (3), post
Plug (4), leading screw (5), screw (6), the second oil cylinder (7), piston (8), oil pipe (11) and controller (12), it is characterised in that：One
Planting electro-hydraulic servo pressure apparatus also includes decelerator (2), pressure transducer (13), displacement transducer (14), sealing shroud (20), rubber
Rubber cushion (21), signal generating element (15), two position switch (16), at least one guide pads (9) and at least one are led
Rail (10), the output shaft of servomotor (1) is connected by decelerator (2) with one end of leading screw (5), and the other end of leading screw (5) is inserted
It is mounted in plunger (4), screw (6) is on leading screw (5), and screw (6) is threadedly coupled with leading screw (5), and screw (6) is packed in
On plunger (4), leading screw (5) and plunger (4) are arranged in the first oil cylinder (3), away from the side of plunger (4) one end of leading screw (5)
At least one guide pad (9) is fixed with wall, at least one guiding rail (10) is provided with the medial wall of the first oil cylinder (3),
Slip in each guiding rail (10) is provided with a guide pad (9), the medial wall of the first oil cylinder (3) and the outside of plunger (4)
Sealing shroud (20) is provided between wall, signal generating element (15) is arranged on the lateral wall of plunger (4), on the first oil cylinder (3)
A position switch (16) is each provided with along the both ends of the first oil cylinder (3) length direction, the first oil cylinder (3) is by oil pipe (11)
Connect with the second oil cylinder (7), piston (8) is arranged in the second oil cylinder (7), the oil of pressure transducer (13) and the second oil cylinder (7)
Room electrically connects, and displacement transducer (14) is electrically connected with the piston rod of piston (8), and rubber blanket (21) is arranged on the outside of piston (8)
On face, the signal output part of pressure transducer (13) and displacement transducer (14) is electrically connected with the signal input part of controller (12)
Connect, the signal output part of controller (12) is electrically connected with the signal input part of servomotor (1).
2. a kind of electro-hydraulic servo pressure apparatus according to claim 1, it is characterised in that：A kind of electro-hydraulic servo pressure apparatus
Also include spring (17), spring (17) is arranged on the piston rod of piston (8).
3. a kind of electro-hydraulic servo pressure apparatus according to claim 2, it is characterised in that：A kind of electro-hydraulic servo pressure apparatus
Also include bearing (18), leading screw (5) is arranged in the first oil cylinder (3) by bearing (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556899.XA CN105065375B (en) | 2015-09-02 | 2015-09-02 | Electro-hydraulic servo pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556899.XA CN105065375B (en) | 2015-09-02 | 2015-09-02 | Electro-hydraulic servo pressure device |
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| CN105065375A CN105065375A (en) | 2015-11-18 |
| CN105065375B true CN105065375B (en) | 2017-04-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108121374A (en) * | 2016-11-30 | 2018-06-05 | 北京航天计量测试技术研究所 | A kind of capacity high-pressure gas pressure control device |
| CN106903536A (en) * | 2017-03-31 | 2017-06-30 | 苏州亚思科精密数控有限公司 | One kind is used for tubing work piece holder clamping means |
| CN106903534A (en) * | 2017-03-31 | 2017-06-30 | 苏州亚思科精密数控有限公司 | A kind of jig for tubing workpiece |
| CN109322869B (en) * | 2018-10-29 | 2024-03-19 | 江苏大学 | Gas-electricity composite driving actuator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2232506Y (en) * | 1995-07-12 | 1996-08-07 | 武汉长江控制设备研究所 | Hydraulic turbine electrolyte speed regulater controlled by electric machine |
| CN1435290A (en) * | 2002-12-31 | 2003-08-13 | 西北工业大学 | Method and device for controlling sliding table of friction welding machine |
| CN101865190B (en) * | 2010-06-29 | 2012-08-15 | 哈尔滨工业大学 | Position and flow double-close-loop direct-drive volume control electro-hydraulic servo system |
| CN202021540U (en) * | 2011-03-23 | 2011-11-02 | 宁夏银川大河数控机床有限公司 | Linear motor driving device for reciprocating follow-up control of spindle of honing machine |
| CN102230863B (en) * | 2011-04-12 | 2013-07-17 | 河南科技大学 | Flexible loading system of friction and wear testing machine |
| CN102797658A (en) * | 2012-08-28 | 2012-11-28 | 路文忠 | Digital linear servo pump |
| CN102889272B (en) * | 2012-10-19 | 2016-01-20 | 南京工程学院 | A kind of piezoelectricity-electric liquid combined drive swing arm and controlling method thereof |
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Effective date of registration: 20201021 Address after: Room 102, 1 / F, building 8, science and Technology Innovation Industrial Park, Harbin Songbei (Shenzhen Longgang), no.3043, Zhigu Second Street, Songbei District, Harbin, Heilongjiang Province Patentee after: Harbin Gongjiang Mechanical and Electrical Technology Co.,Ltd. Address before: 150001 Harbin, Nangang, West District, large straight street, No. 92 Patentee before: HARBIN INSTITUTE OF TECHNOLOGY |