CN107052283A - A kind of crystallizer vibration control device - Google Patents
A kind of crystallizer vibration control device Download PDFInfo
- Publication number
- CN107052283A CN107052283A CN201710076072.8A CN201710076072A CN107052283A CN 107052283 A CN107052283 A CN 107052283A CN 201710076072 A CN201710076072 A CN 201710076072A CN 107052283 A CN107052283 A CN 107052283A
- Authority
- CN
- China
- Prior art keywords
- rod
- hydraulic cylinder
- chambers
- accumulator
- chamber hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/053—Means for oscillating the moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/166—Controlling or regulating processes or operations for mould oscillation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to a kind of crystallizer vibration control device, including drive mechanism, two-way quantitative pump, electromagnetic shut-off valve, first accumulator and single chamber hydraulic cylinder of rod three, the output end of drive mechanism is connected with the input of two-way quantitative pump, the A mouths of two-way quantitative pump are connected with the A chambers of single chamber hydraulic cylinder of rod three, the B mouths of two-way quantitative pump are connected with the B chambers of single chamber hydraulic cylinder of rod three, pipeline between the B chambers of the B mouths of two-way quantitative pump and single chamber hydraulic cylinder of rod three is provided with electromagnetic shut-off valve, first accumulator is connected with the C chambers of single chamber hydraulic cylinder of rod three, the output shaft connection oscillating load of single chamber hydraulic cylinder of rod three.The advantage of the invention is that：Single cavity area of rod asymmetrical cylinder two is not only completely solved than control flow mismatch problem, balance gravity load simultaneously, reduce installed power, reduce operation energy consumption, on the premise of system control accuracy and response characteristic is met, investment and the operating cost of crystallizer vibrating system can be greatly reduced.
Description
Technical field
The present invention relates to mold oscillation technology for CC field, particularly a kind of crystallizer vibration control device.
Background technology
Mould vibration device is as the key equipment of conticaster, and it is to be ensured by the vibration of crystallizer in casting that it, which is acted on,
During strand do not bonded with crystallizer copper wall, and obtain good cc billet surface quality.Existing mold oscillation dress
Put and be divided into mechanical vibration, hydraulic servo vibration, electric cylinder vibration according to drive control form.Mechanical mould vibration device
Sinusoidal vibration is generally realized using electric rotating machine and eccentric wheel connecting rod mechanism, it has the disadvantage that mechanical wear is serious, is difficult to
The vibration parameters such as non-sinusoidal oscillation, amplitude and deviation proportion are unable to on-line control；Hydraulic servo mould vibration device is using electro-hydraulic
Servo valve control hydraulic cylinder realizes sinusoidal and non-sinusoidal oscillation, in that context it may be convenient to realize the online tune of amplitude, frequency and waveform
Whole it has the disadvantage as a result of electrohydraulic servo valve with monitoring, and requires high to oil cleanliness, its construction, operation, maintenance cost
It is high；Electric cylinder mould vibration device realizes that sinusoidal and non-sine is shaken using servo electric jar direct drive crystallizer vibration platform
It is dynamic, have the advantages that cost is relatively low, plant maintenance facilitates, pollution-free, but the impact resistance of its core driving member leading screw
The shortcomings of poor, easy to wear, short life, constrain the broader applications of electric cylinder mould vibration device.
With the development of hydraulic technique, a kind of new servo-drive mode, i.e. Direct Drive Electro-hydraulic Servo System are occurred in that.
The commutation of Direct Drive Electro-hydraulic Servo System, speed governing, pressure regulation three zones are direct by Serve Motor Control, it is not necessary to which conventional is electro-hydraulic
Servo valve, so that the requirement to oil cleanliness is substantially reduced.Compared with conventional electro-hydraulic servo-drive system, direct drive type electrohydraulic servo system
Big multiple advantage that system controls flexible, Electrified Transmission energy consumption low with servo motor transmission and hydraulic drive is exerted oneself.
Publication No. WO2015/121829 A1 pct international patent, which is disclosed, is applied to Direct Drive Electro-hydraulic Servo System
The mould vibration device of one side driving, two kinds of controls are disclosed for double rod asymmetric cylinders and single rod asymmetrical cylinder executing agency
Loop processed.Wherein single rod asymmetrical cylinder control loop is different due to the chamber volume of asymmetrical cylinder two, employs " small one and large one "
Two two-way quantitative pump schemes, big pump controls the big chamber of asymmetrical cylinder, and small pump controls the small chamber of asymmetrical cylinder, and this control program is present
The cavity area of asymmetrical cylinder two because the cavity area ratio of asymmetrical cylinder two can be matched arbitrarily, and is quantified than control flow matches problem
What the discharge capacity of pump was to determine, the quantitative pumpage of commercialization has certain series, and the discharge capacity ratio of big pump and small pump is difficult to by choosing
Type, than completely corresponding, cause the difficulty of pressure oscillation and the control of two chambers, influences final control with the cavity area of asymmetrical cylinder two
Precision；If by the customization of quantitative pumpage, accomplishing with the cavity area of asymmetrical cylinder two than completely corresponding, greatly increasing into
This.Double rod asymmetric cylinders and single two kinds of control loops of rod asymmetrical cylinder are required under sinusoidal or non-sinusoidal motion simultaneously
The load overcome includes crystallizer and vibrates gravity, the frictional force of crystallizer and strand, inertia force of stand etc., wherein crystallizer
And the gravity accounting of vibration stand is maximum, up to 20 tons or so, accounts for the 90% of total load, this is by the entirety for the system that greatly increases
Power configuration, increase investment and operating cost.
The content of the invention
It is an object of the invention to the shortcoming for overcoming prior art there is provided a kind of crystallizer vibration control device, propose
A kind of Direct Drive Electro-hydraulic Servo System and the single chamber cylinder control program of rod three of accumulator control, not only completely solve single rod
The cavity area of asymmetrical cylinder two, while balancing gravity load, reduces installed power than control flow mismatch problem, drops
Low operation energy consumption, on the premise of system control accuracy and response characteristic is met, can be greatly reduced crystallizer vibrating system
Investment and operating cost.
The purpose of the present invention is achieved through the following technical solutions：A kind of crystallizer vibration control device, including driving machine
Structure, two-way quantitative pump, electromagnetic shut-off valve, the first accumulator and single chamber hydraulic cylinder of rod three, the output end of the drive mechanism with
The input connection of two-way quantitative pump, two-way quantitative pump has A mouthfuls and B mouthfuls, and single chamber hydraulic cylinder of rod three has A chambers, B chambers and C
Chamber, the A mouths of two-way quantitative pump are connected with the A chambers of single chamber hydraulic cylinder of rod three, the B mouths of two-way quantitative pump and single chamber hydraulic pressure of rod three
Pipeline between the B chambers of the B chambers connection of cylinder, the B mouths of the two-way quantitative pump and single chamber hydraulic cylinder of rod three is cut provided with electromagnetism
Disconnected valve, first accumulator is connected with the C chambers of single chamber hydraulic cylinder of rod three, and the output shaft of single chamber hydraulic cylinder of rod three connects
Connect oscillating load.
The A chambers of the chamber hydraulic cylinder of single rod three are equal with the sectional area of B chambers.
Also include the second accumulator, the second accumulator A mouths respectively with two-way quantitative pump, the B mouths of two-way quantitative pump and
First accumulator is connected.
Be provided with the first check valve between the A mouths of second accumulator and two-way quantitative pump, second accumulator with
The second check valve is provided between the B mouths of two-way quantitative pump.
The first safety valve, second accumulator are additionally provided between the A mouths of second accumulator and two-way quantitative pump
The second safety valve is additionally provided between the B mouths of two-way quantitative pump, is provided between second accumulator and the first accumulator
3rd safety valve.
Pressure-reducing valve is additionally provided between the B chambers of first accumulator and single chamber hydraulic cylinder of rod three.
Also include control assembly, the control assembly includes first pressure sensor, second pressure sensor, the 3rd pressure
Sensor, displacement transducer, controller and driver, first pressure sensor are arranged at the B chambers of single chamber hydraulic cylinder of rod three,
Second pressure sensor is arranged at the A chambers of single chamber hydraulic cylinder of rod three, and the 3rd pressure sensor is arranged at single chamber liquid of rod three
At the C chambers of cylinder pressure, displacement transducer is arranged at the output shaft of single chamber hydraulic cylinder of rod three, first pressure sensor, the second pressure
Force snesor, the 3rd pressure sensor and displacement transducer are connected with the signal input part of controller respectively, the letter of controller
The signal input part of number output end and driver is connected, and the signal output part of driver and the signal input part of drive mechanism connect
Connect.
The drive mechanism is servomotor.
The signal output part of the controller and the signal input part of electromagnetic shut-off valve are connected.
The present invention has advantages below：
1st, the present invention realizes single rod hydraulic pressure using accumulator and the single chamber hydraulic cylinder of rod three of two-way pump control by a pump
The motion control of cylinder, while the control of asymmetrical cylinder is converted into the control of symmetrical hydraulic cylinder, solves asymmetric hydraulic pressure
Cylinder flow imbalance problem, while simplifying control program, reduces control difficulty.
2nd, gravity load is balanced using accumulator and single chamber hydraulic cylinder of rod three so that vibrational system need to only overcome friction
Power and inertia force, substantially reduce installed power, reduce operation energy consumption.
Brief description of the drawings
Fig. 1 is system principle schematic diagram of the invention；
In figure：1- drive mechanisms, 2- two-way quantitative pumps, the check valves of 3- first, the check valves of 4- second, the safety valves of 5- first,
The safety valves of 6- second, the accumulators of 7- second, 8- electromagnetic shut-off valves, 9- first pressure sensors, 10- second pressure sensors, 11-
3rd safety valve, 12- pressure-reducing valves, the accumulators of 13- first, the pressure sensors of 14- the 3rd, the mono- chamber hydraulic cylinders of rod three of 15-, 16-
Displacement transducer, 17- oscillating loads, 18- controllers, 19- drivers.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to following institute
State.
As shown in figure 1, a kind of crystallizer vibration control device, including drive mechanism 1, two-way quantitative pump 2, electromagnetic shut-off valve
8th, the first accumulator 13 and single chamber hydraulic cylinder 15 of rod three, the output end of the drive mechanism 1 and the input of two-way quantitative pump 2
Connection, two-way quantitative pump 2 has A mouthfuls and B mouthfuls, and single chamber hydraulic cylinder 15 of rod three has A chambers, B chambers and C chambers, two-way quantitative pump 2
A mouthfuls are connected with the A chambers of single chamber hydraulic cylinder 15 of rod three, and the B chambers of the B mouths of two-way quantitative pump 2 and single chamber hydraulic cylinder 15 of rod three connect
Connect, the pipeline between the B chambers of the B mouths of the two-way quantitative pump 2 and single chamber hydraulic cylinder 15 of rod three is provided with electromagnetic shut-off valve 8,
First accumulator 13 is connected with the C chambers of single chamber hydraulic cylinder 15 of rod three, the output shaft of single chamber hydraulic cylinder 15 of rod three
Connect oscillating load 17.
Preferably, the A chambers of the chamber hydraulic cylinder 15 of single rod three are equal with the sectional area of B chambers.
Preferably, in addition to the second accumulator 7, the second accumulator 7 A mouths respectively with two-way quantitative pump 2, two-way fixed
The B mouths and the first accumulator 13 for measuring pump 2 are connected, and unloading port of second accumulator 7 also with two-way quantitative pump 2 is connected.
Preferably, the first check valve 3 is provided between the A mouths of second accumulator 7 and two-way quantitative pump 2, it is real
Setting between the existing repairing function of the A chambers of single chamber hydraulic cylinder 15 of rod three, B mouths of second accumulator 7 and two-way quantitative pump 2
There is the second check valve 4, the second check valve 4 realizes the repairing function of the B chambers of single chamber hydraulic cylinder 15 of rod three.
Preferably, the first safety valve 5 is additionally provided between the A mouths of second accumulator 7 and two-way quantitative pump 2,
The second safety valve 6, second accumulator 7 and are additionally provided between the B mouths of second accumulator 7 and two-way quantitative pump 2
The 3rd safety valve 11 is provided between one accumulator 13, prevents the two-chamber and the first accumulator of two-way quantitative pump 2 from 13 surpassing respectively
Pressure.
Preferably, it is additionally provided with decompression between the B chambers of first accumulator 13 and single chamber hydraulic cylinder 15 of rod three
Valve 12, the entrance of pressure-reducing valve 12 is connected to the B chambers of single chamber hydraulic cylinder 15 of rod three, the first accumulator 13 of outlet connection.
Preferably, in addition to control assembly, the control assembly includes first pressure sensor 9, second pressure and passed
Sensor 10, the 3rd pressure sensor 14, displacement transducer 16, controller 18 and driver 19, first pressure sensor 9 are arranged at
At the B chambers of single chamber hydraulic cylinder 15 of rod three, second pressure sensor 10 is arranged at the A chambers of single chamber hydraulic cylinder 15 of rod three, the
Three pressure sensors 14 are arranged at the C chambers of single chamber hydraulic cylinder 15 of rod three, and displacement transducer 16 is arranged at single chamber liquid of rod three
At the output shaft of cylinder pressure 15, first pressure sensor 9, second pressure sensor 10, the 3rd pressure sensor 14 and displacement are passed
Signal input part of the sensor 16 respectively with controller 18 is connected, and the signal output part of controller 18 is inputted with the signal of driver 19
End connection, the signal output part of driver 19 is connected with the signal input part of drive mechanism 1, and first pressure sensor 9, electromagnetism are cut
Disconnected valve 8, second pressure sensor 10, the 3rd pressure sensor 14, the signal access controller 18 of displacement transducer 16, controller 18
Control instruction access driver 19, driver 19 driving instruction access drive mechanism 1.
Preferably, the drive mechanism 1 is servomotor.
Preferably, the signal output part of the controller 18 is connected with the signal input part of electromagnetic shut-off valve 8, just
Obtain electric under normal state so that oil circuit conducting, locks the current location of three chamber hydraulic cylinder of single rod 15 under power failure state, it is possible to achieve
The off-position function of single chamber hydraulic cylinder 15 of rod three.
The present invention operation principle be：When crystallizer vibrating system works, controller 18 receives outside PLC instructions setting
Oscillating curve converts output control to driver 19 by control algolithm, and driver 19 is according to given order-driven drive mechanism 1
Rotating is carried out, the rotating of rotating driving two-way quantitative pump 2 of drive mechanism 1, the rotating driving of two-way quantitative pump 2 singly goes out
Bar three chamber hydraulic cylinder 15 is extended and retracted.
Claims (9)
1. a kind of crystallizer vibration control device, it is characterised in that：Cut including drive mechanism (1), two-way quantitative pump (2), electromagnetism
Disconnected valve (8), the first accumulator (13) and the list chamber hydraulic cylinder (15) of rod three, the output end of the drive mechanism (1) with it is two-way fixed
The input connection of pump (2) is measured, two-way quantitative pump (2) has A mouthfuls and B mouthfuls, and single chamber hydraulic cylinder (15) of rod three has A chambers, B chambers
With C chambers, the A mouths of two-way quantitative pump (2) be connecteds with the A chambers of single chamber hydraulic cylinder (15) of rod three, the B mouths of two-way quantitative pump (2) and
The B chambers connection of single chamber hydraulic cylinder (15) of rod three, the B of the B mouths of the two-way quantitative pump (2) and single chamber hydraulic cylinder (15) of rod three
Pipeline between chamber is provided with electromagnetic shut-off valve (8), first accumulator (13) and the C chambers of single chamber hydraulic cylinder (15) of rod three
Connection, the output shaft connection oscillating load (17) of single chamber hydraulic cylinder (15) of rod three.
2. a kind of crystallizer vibration control device according to claim 1, it is characterised in that：The chamber hydraulic pressure of single rod three
The A chambers of cylinder (15) are equal with the sectional area of B chambers.
3. a kind of crystallizer vibration control device according to claim 1, it is characterised in that：Also include the second accumulator
(7), A mouths, the B mouths and the first accumulator of two-way quantitative pump (2) of the second accumulator (7) respectively with two-way quantitative pump (2)
(13) connect.
4. a kind of crystallizer vibration control device according to claim 3, it is characterised in that：Second accumulator (7)
The first check valve (3), second accumulator (7) and two-way quantitative pump (2) are provided between the A mouths of two-way quantitative pump (2)
B mouths between be provided with the second check valve (4).
5. a kind of crystallizer vibration control device according to claim 3 or 4, it is characterised in that：Second accumulator
(7) the first safety valve (5), second accumulator (7) and two-way quantitative are additionally provided between the A mouths of two-way quantitative pump (2)
The second safety valve (6) is additionally provided between the B mouths of pump (2), is set between second accumulator (7) and the first accumulator (13)
There is the 3rd safety valve (11).
6. a kind of crystallizer vibration control device according to claim 5, it is characterised in that：First accumulator (13)
Pressure-reducing valve (12) is additionally provided between the B chambers of single chamber hydraulic cylinder (15) of rod three.
7. a kind of crystallizer vibration control device according to claim 1, it is characterised in that：Also include control assembly, institute
Control assembly is stated to pass including first pressure sensor (9), second pressure sensor (10), the 3rd pressure sensor (14), displacement
Sensor (16), controller (18) and driver (19), first pressure sensor (9) are arranged at single chamber hydraulic cylinder (15) of rod three
At B chambers, second pressure sensor (10) is arranged at the A chambers of single chamber hydraulic cylinder (15) of rod three, the 3rd pressure sensor (14)
At the C chambers for being arranged at single chamber hydraulic cylinder (15) of rod three, displacement transducer (16) is arranged at single chamber hydraulic cylinder (15) of rod three
At output shaft, first pressure sensor (9), second pressure sensor (10), the 3rd pressure sensor (14) and displacement sensing
Signal input part of the device (16) respectively with controller (18) is connected, the signal output part of controller (18) and the letter of driver (19)
Number input connection, the signal output part of driver (19) is connected with the signal input part of drive mechanism (1).
8. a kind of crystallizer vibration control device according to claim 1 or 7, it is characterised in that：The drive mechanism (1)
For servomotor.
9. a kind of crystallizer vibration control device according to claim 7, it is characterised in that：The letter of the controller (18)
Number output end is connected with the signal input part of electromagnetic shut-off valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076072.8A CN107052283B (en) | 2017-02-10 | 2017-02-10 | Crystallizer vibration control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076072.8A CN107052283B (en) | 2017-02-10 | 2017-02-10 | Crystallizer vibration control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107052283A true CN107052283A (en) | 2017-08-18 |
| CN107052283B CN107052283B (en) | 2023-08-15 |
Family
ID=59599240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710076072.8A Active CN107052283B (en) | 2017-02-10 | 2017-02-10 | Crystallizer vibration control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107052283B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107448434A (en) * | 2017-09-26 | 2017-12-08 | 中冶赛迪工程技术股份有限公司 | A kind of continuous cast mold vibration energy saving servo hydraulic cylinder and hydraulic system |
| CN107816505A (en) * | 2017-10-19 | 2018-03-20 | 燕山大学 | A kind of active control hydraulic servo buffer |
| CN114603090A (en) * | 2022-03-11 | 2022-06-10 | 北京海卓博尔科技有限公司 | Crystallizer vibration driving device, control method and control system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19925564A1 (en) * | 1999-06-04 | 2000-12-07 | Mannesmann Rexroth Ag | Hydraulic drive, especially for an oscillating continuous casting mold, comprises vertical double-acting cylinders with mold weight compensation pressure chambers at their lower piston rod free ends |
| CN202398792U (en) * | 2011-12-30 | 2012-08-29 | 新兴铸管股份有限公司 | Hydraulic system for non-sinusoidal oscillation of crystallizer |
| JP2012229777A (en) * | 2011-04-27 | 2012-11-22 | Yuken Kogyo Co Ltd | Hydraulic circuit for raising/lowering boom cylinder |
| CN103244472A (en) * | 2013-05-08 | 2013-08-14 | 中国重型机械研究院股份公司 | Servo hydraulic cylinder valve system for hydraulically balancing gravity load of crystallizer |
| CN104847732A (en) * | 2015-03-17 | 2015-08-19 | 北京理工大学 | Valve-controlled cylinder system for unbalance load |
| CN104863910A (en) * | 2015-05-24 | 2015-08-26 | 南京理工大学 | Heavy long rod hoisting mechanism hydraulic system and control method |
| CN105544631A (en) * | 2015-12-29 | 2016-05-04 | 太原理工大学 | Control loop of hydraulic bucket working device |
| CN105715597A (en) * | 2016-03-18 | 2016-06-29 | 中冶赛迪工程技术股份有限公司 | Constant-backpressure direct drive type electro hydraulic servo system and control method thereof |
-
2017
- 2017-02-10 CN CN201710076072.8A patent/CN107052283B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19925564A1 (en) * | 1999-06-04 | 2000-12-07 | Mannesmann Rexroth Ag | Hydraulic drive, especially for an oscillating continuous casting mold, comprises vertical double-acting cylinders with mold weight compensation pressure chambers at their lower piston rod free ends |
| JP2012229777A (en) * | 2011-04-27 | 2012-11-22 | Yuken Kogyo Co Ltd | Hydraulic circuit for raising/lowering boom cylinder |
| CN202398792U (en) * | 2011-12-30 | 2012-08-29 | 新兴铸管股份有限公司 | Hydraulic system for non-sinusoidal oscillation of crystallizer |
| CN103244472A (en) * | 2013-05-08 | 2013-08-14 | 中国重型机械研究院股份公司 | Servo hydraulic cylinder valve system for hydraulically balancing gravity load of crystallizer |
| CN104847732A (en) * | 2015-03-17 | 2015-08-19 | 北京理工大学 | Valve-controlled cylinder system for unbalance load |
| CN104863910A (en) * | 2015-05-24 | 2015-08-26 | 南京理工大学 | Heavy long rod hoisting mechanism hydraulic system and control method |
| CN105544631A (en) * | 2015-12-29 | 2016-05-04 | 太原理工大学 | Control loop of hydraulic bucket working device |
| CN105715597A (en) * | 2016-03-18 | 2016-06-29 | 中冶赛迪工程技术股份有限公司 | Constant-backpressure direct drive type electro hydraulic servo system and control method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 周佩秋等, 中央广播电视大学出版社, pages: 211 - 212 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107448434A (en) * | 2017-09-26 | 2017-12-08 | 中冶赛迪工程技术股份有限公司 | A kind of continuous cast mold vibration energy saving servo hydraulic cylinder and hydraulic system |
| CN107816505A (en) * | 2017-10-19 | 2018-03-20 | 燕山大学 | A kind of active control hydraulic servo buffer |
| CN114603090A (en) * | 2022-03-11 | 2022-06-10 | 北京海卓博尔科技有限公司 | Crystallizer vibration driving device, control method and control system |
| CN114603090B (en) * | 2022-03-11 | 2023-06-16 | 北京海卓博尔科技有限公司 | Crystallizer vibration driving device, control method and control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107052283B (en) | 2023-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110497760B (en) | Active and passive dual-mode switchable vehicle suspension system and switching method thereof | |
| CN101392809B (en) | Active hydraulic damper and hydraulic actuator | |
| CN107052283A (en) | A kind of crystallizer vibration control device | |
| CN103148032B (en) | A kind of Study of Cyclic Loading hydraulic system | |
| CN107630847A (en) | Electric ratio pressure continuously regulates and controls hydraulic motor/pump | |
| CN204646828U (en) | Servo-hydraulic final controlling element | |
| CN108083116A (en) | A kind of hydraulic control system for crane | |
| CN101142039A (en) | Die cushion control device | |
| CN104632794A (en) | Electro-hydraulic servo system of direct drive type hydraulic hoist | |
| CN105544631B (en) | A kind of control loop of hydraulic shovel equipment | |
| CN104989692B (en) | Compound control-type variable pump and control method thereof | |
| CN206425502U (en) | A kind of crystallizer vibration control device | |
| CN205446224U (en) | Formula electricity liquid servo is directly driven to invariable backpressure | |
| WO2016030727A1 (en) | Mobilized tail bearing pumpjack | |
| CN105351266B (en) | A kind of high-performance mining elevator hydraulic control system | |
| CN201382031Y (en) | Generating device of servo hydraulic pump station | |
| CN108286545B (en) | Hydraulic control system for upper ram oil cylinder of internal mixer | |
| CN106194680A (en) | The axial plunger pump installation of a kind of high accuracy electric proportional control and control method | |
| CN206668636U (en) | A kind of positive displacement heave compensation hydraulic system and heave compensation Lift-on/Lift-off System | |
| CN205677896U (en) | EHA VPVM drives helm gear | |
| CN111036865B (en) | Electro-hydraulic direct-drive small square billet continuous casting crystallizer vibration driving device | |
| CN213802704U (en) | Hydraulic lifting control system | |
| CN110671373A (en) | Electric hydraulic control system of double-valve parallel control hydraulic cylinder | |
| CN113683033A (en) | Hydraulic full-time floating control system and control method of cantilever type aerial work platform | |
| CN212272670U (en) | Electric hydraulic control system based on two different valves parallel control hydraulic cylinders |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |