CN203335494U - Servo hydraulic cylinder valve gear of hydraulic balance crystallizer weight loads - Google Patents
Servo hydraulic cylinder valve gear of hydraulic balance crystallizer weight loads Download PDFInfo
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- CN203335494U CN203335494U CN2013202441993U CN201320244199U CN203335494U CN 203335494 U CN203335494 U CN 203335494U CN 2013202441993 U CN2013202441993 U CN 2013202441993U CN 201320244199 U CN201320244199 U CN 201320244199U CN 203335494 U CN203335494 U CN 203335494U
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Abstract
The utility model provides a servo hydraulic cylinder valve gear of hydraulic balance crystallizer weight loads. The servo hydraulic cylinder valve gear of hydraulic balance crystallizer weight loads comprises an electro-hydraulic servo valve for controlling hydraulic pressure and a servo hydraulic cylinder of a double-rod-outlet structure, wherein a displacement sensor is arranged in the servo hydraulic cylinder of the double-rod-outlet structure, a hydraulic circuit of an upper cavity of the servo hydraulic cylinder of the double-rod-outlet structure and a hydraulic circuit of a lower cavity of the servo hydraulic cylinder of the double-rod-outlet structure are respectively connected with a pressure sensor, a hydraulic circuit is connected to a container between a lower end cover of the servo hydraulic cylinder of the double-rod-outlet structure and the lower end of a piston rod of the servo hydraulic cylinder of the double-rod-outlet structure, and the hydraulic circuit is composed of an oil delivery pipeline and an oil return pipeline which are connected between the electro-hydraulic servo valve and the container. The system is low in investment cost and operation cost, high in control accuracy, fast in response and capable of prolonging the service life of a crystallizer vibration device.
Description
Technical field
The utility model belongs to servo hydraulic system, a kind of mold oscillation hydraulic servo control system specifically, especially a kind of servo hydraulic cylinder control valve unit of hydraulic balance crystallizer gravity load.
Background technique
The mold oscillation hydraulic servo control system is comprised of control unit (electrohydraulic control), Detecting element (displacement transducer and pressure transducer), executive component (servo hydraulic cylinder) etc. usually.Hydraulic control system adopts position closed loop to control, and requires that the system control accuracy is high, response is fast.The mold oscillation servo hydraulic cylinder adopts two rod structures usually, and (electrical control of single rod structure servo hydraulic cylinder is comparatively complicated, because huge pressure jump appears in the moment in the electrohydraulic control commutation, affect the system works stationarity), the vibration servo hydraulic cylinder in sine or non-sine movement process, the counter-force of the frictional force of the gravity that the load that servo hydraulic cylinder overcomes is crystallizer and vibration frame, crystallizer and strand, the counter-force of damping spring, the leaf spring that leads and realize speed and the inertial force of acceleration diagram.The gravity load that the load wherein mainly overcome is crystallizer and vibration frame, and the gravity load up to tens tons can increase whole configuration and the cost of investment of servo hydraulic system, reduces control accuracy and the rapidity of whole system.4 damping spring rigidity that the while equilibrium crystallization is thought highly of power are difficult to identical, easily cause the inequality of buffering counter-force, cause the not steady of vibration, easily cause the beat of mold oscillation, thereby make to vibrate the servo-hydraulic cylinder piston rod and bear lateral force, accelerated wear test and losing efficacy.
The model utility content
The purpose of this utility model is to provide a kind of servo hydraulic cylinder control valve unit of hydraulic balance crystallizer gravity load, make balanced action in vibration the crystallizer on servo hydraulic cylinder and the gravity of vibration frame, reduce the configuration capacity size of servo hydraulic system, reduce the cost of investment of whole servo-system, improve control accuracy and the response of system.
For this reason, the utility model provides a kind of servo hydraulic cylinder control valve unit of hydraulic balance crystallizer gravity load, comprise the electrohydraulic control of controlling hydraulic pressure, the servo hydraulic cylinder of two rod structures, be provided with displacement transducer in the servo hydraulic cylinder of this pair of rod structure, the servo hydraulic cylinder epicoele of this pair of rod structure and the oil hydraulic circuit of cavity of resorption are connected with respectively a pressure transducer, it is characterized in that: increase this buffer cavity of buffer cavity and be connected to an oil hydraulic circuit between the lower end of the piston rod of the servo hydraulic cylinder of the lower end cap of the servo hydraulic cylinder of described pair of rod structure and this pair of rod structure, this oil hydraulic circuit is by the oil transport pipeline be connected between electrohydraulic control and buffer cavity, oil returning tube forms.
Be provided with reduction valve on described oil transport pipeline.
Be provided with accumulator on described oil transport pipeline, this accumulator is placed between the servo hydraulic cylinder of reduction valve and two rod structures.
Oil transport pipeline between the servo hydraulic cylinder of described accumulator and two rod structures is provided with miniature pressure measuring tie-in.
Be provided with safety valve on described oil returning tube.
The utility model compared with prior art has advantages of: at the hydraulic oil of the logical certain pressure in the bottom of mold oscillation servo hydraulic cylinder, hydraulic oil acts on the piston rod end of servo hydraulic cylinder, producing active force upwards and the gravity of crystallizer and framework offsets, load force when now in the servo hydraulic cylinder working procedure, rising and descending is basic identical, required flow and pressure are less, whole servo-system power source configuration capacity is less, cost of investment and the operating cost of system have been reduced, and improved the control accuracy of system, the working life of rapidity and mould vibration device.
The accompanying drawing explanation
Fig. 1 is that the utility model is implemented hydraulic schematic diagram;
Fig. 2 is the bottom schematic diagram of the servo hydraulic cylinder of two rod structures.
In figure: 1, electrohydraulic control; 2, the servo hydraulic cylinder of two rod structures; 3, displacement transducer; 40,41, pressure transducer; 5, accumulator; 6, reduction valve; 7, safety valve; 8, load; 9, epicoele; 10, cavity of resorption; 11, oil transport pipeline; 12, oil returning tube; 13, buffer cavity; 2.1, lower end cap; 2.2, the servo-hydraulic cylinder piston rod of two rod structures; 2.3, the servo hydraulic cylinder clearance seal of two rod structures; M, miniature pressure measuring tie-in; P, hydraulic system are for pressure oil; T, hydraulic system oil return; A, electrohydraulic control connect servo hydraulic cylinder epicoele hydraulic fluid port; B, electrohydraulic control connect servo hydraulic cylinder cavity of resorption hydraulic fluid port; P1, through the post-decompression pressure of reduction valve; Q
l, servo hydraulic cylinder leaks oily flow.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
For realize balanced action in vibration the crystallizer on servo hydraulic cylinder and the gravity of vibration frame, reduce the configuration capacity size of servo hydraulic system, reduce the cost of investment of whole servo-system, the control accuracy of raising system and the purpose of response, the present embodiment provides the servo hydraulic cylinder valve system of the hydraulic balance crystallizer gravity load shown in a kind of Fig. 1, comprise the electrohydraulic control 1 of controlling hydraulic pressure, the servo hydraulic cylinder 2 of two rod structures, be provided with displacement transducer 3 in the servo hydraulic cylinder 2 of this pair of rod structure, servo hydraulic cylinder 2 epicoeles 9 of this pair of rod structure and the oil hydraulic circuit of cavity of resorption 10 are connected with respectively a pressure transducer 40, 41, the lower end cap 2.1(of the servo hydraulic cylinder 2 of two rod structures is shown in Fig. 2) and the lower end of the piston rod 2.2 of the servo hydraulic cylinder 2 of this pair of rod structure between buffer cavity 13 be connected to an oil hydraulic circuit, this oil hydraulic circuit is by the oil transport pipeline 11 be connected between electrohydraulic control 1 and buffer cavity 13, oil returning tube 12 forms.Be provided with reduction valve 6 on oil transport pipeline 11, that with servo hydraulic cylinder 2 bottoms of guaranteeing two rod structures, obtain is the post-decompression pressure oil P1 with certain pressure, this hydraulic oil acts on the bottom of piston rod 2.2, makes piston rod 2.2 obtain thrust upwards.
Simultaneously, be provided with accumulator 5 on oil transport pipeline 11, this accumulator 5 is placed between the servo hydraulic cylinder 2 of reduction valve 6 and two rod structures.And the oil transport pipeline 11 between the servo hydraulic cylinder 2 of accumulator 5 and two rod structures is provided with miniature pressure measuring tie-in M, can carry out Pressure testing to buffer cavity at this.
Be provided with safety valve 7 on oil returning tube 12, guarantee the safety of whole decompression oil hydraulic circuit.
In the servo hydraulic cylinder 2 of two rod structures, displacement transducer 3 is arranged, be connected with respectively pressure transducer 4 at the epicoele 9 of the servo hydraulic cylinder 2 of two rod structures and the oil hydraulic circuit of cavity of resorption 10, control and drive the servo hydraulic cylinder 2 of two rod structures and the gravity of load 8(crystallizer and vibration frame by electrohydraulic control 1) do sine or non-sinusoidal oscillation, the hydraulic oil that the reduction valve 6 that stimulated the menstrual flow in the buffer cavity 13 that the piston rod 2.2 of the lower end cap 2.1 of the servo hydraulic cylinder 2 of two rod structures and the servo hydraulic cylinder 2 of two rod structures forms reduces pressure, be provided with accumulator 5 and safety valve 7 simultaneously on pressure reducing circuit, reduce pressure surge and carry out safety protection.
During work, electrohydraulic control 1 is accepted computer and is set by PLC control signal generator the servo hydraulic cylinder 2 that oscillating curve is controlled two rod structures, drive load 8(crystallizer and vibration frame) operation, and by the feedback signal correction oscillating curve of displacement transducer 3 and pressure transducer 4.Pass into the pressure oil P1 to the system pressure decompression in bottom buffer cavity 13 by the servo hydraulic cylinder 2 in two rod structures, pressure oil P1 acts on the piston rod 2.2 of servo hydraulic cylinder 2 of two rod structures, produce active force upwards, the piston rod 2.2 of the servo hydraulic cylinder 2 of the two rod structures of process leaks into fuel tank with clearance seal 2.3 places simultaneously, and leakage flow is Q
l, when the pressure of setting when reduction valve 6 is suitable, just in time with the gravity of crystallizer and vibration frame, balance each other, the actual loading power of vibrating servo hydraulic cylinder is reduced.When the load force of vibrating servo hydraulic cylinder reduces, the flow of the power source of servo hydraulic system and pressure can reduce simultaneously, the specification of respective electrical hydraulic servo 1 also can reduce, the specification of the servo hydraulic cylinder 2 of two rod structures also can reduce, and can reduce like this available power (input power) and the useless power (system heating) of system in the investment of whole servo hydraulic system and running.Be provided with accumulator 5 on pressure reducing circuit, can reduce the pressure pulsation of the pressure reducing circuit in vibration processes, guarantee that active force upwards is substantially constant, well offset with crystallizer and vibration frame gravity simultaneously.Clearance seal 2.3 places at the lower piston bar 2.2 of the servo hydraulic cylinder 2 of two rod structures adopt clearance seals, by the leakage at clearance seal 2.3 places, take away heat, and leakage flow is Q
l, automatically supplement the fresh oil through filtration under diminished pressure simultaneously, keep cleaning of fluid herein.Wherein in figure, P is that hydraulic system is for pressure oil; T is the hydraulic system oil return; A is that electrohydraulic control connects servo hydraulic cylinder epicoele hydraulic fluid port; B is that electrohydraulic control connects servo hydraulic cylinder cavity of resorption hydraulic fluid port.
The utility model compared with prior art has advantages of: at the hydraulic oil of the logical certain pressure in the bottom of mold oscillation servo hydraulic cylinder, hydraulic oil acts on the piston rod end of servo hydraulic cylinder, producing active force upwards and the gravity of crystallizer and framework offsets, load force when now in the servo hydraulic cylinder working procedure, rising and descending is basic identical, required flow and pressure are less, whole servo-system power source configuration capacity is less, cost of investment and the operating cost of system have been reduced, and improved the control accuracy of system, the working life of rapidity and mould vibration device.
The foregoing is only an instantiation of the present utility model, and unrestricted the utility model, the utility model can have various modifications and variations.All within the spirit and principle of this practical information, any modification of doing, improvement etc., within all should being included in protection domain of the present utility model.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (5)
1. the servo hydraulic cylinder control valve unit of a hydraulic balance crystallizer gravity load, comprise the electrohydraulic control (1) of controlling hydraulic pressure, the servo hydraulic cylinder of two rod structures (2), be provided with displacement transducer (3) in the servo hydraulic cylinder of this pair of rod structure (2), the oil hydraulic circuit of the servo hydraulic cylinder of this pair of rod structure (2) epicoele (9) and cavity of resorption (10) is connected with respectively a pressure transducer (40, 41), it is characterized in that: increase this buffer cavity of a buffer cavity (13) (13) and be connected to an oil hydraulic circuit between the lower end of the piston rod (2.2) of the servo hydraulic cylinder (2) of the lower end cap (2.1) of the servo hydraulic cylinder (2) of described pair of rod structure and this pair of rod structure, this oil hydraulic circuit is by the oil transport pipeline (11) be connected between electrohydraulic control (1) and buffer cavity (13), oil returning tube (12) forms.
2. the servo hydraulic cylinder control valve unit of hydraulic balance crystallizer gravity load as claimed in claim 1, is characterized in that: be provided with reduction valve (6) on described oil transport pipeline (11).
3. the servo hydraulic cylinder control valve unit of hydraulic balance crystallizer gravity load as claimed in claim 2, it is characterized in that: be provided with accumulator (5) on described oil transport pipeline (11), this accumulator (5) is placed between the servo hydraulic cylinder (2) of reduction valve (6) and two rod structures.
4. the servo hydraulic cylinder control valve unit of hydraulic balance crystallizer gravity load as claimed in claim 3 is characterized in that: the oil transport pipeline (11) between the servo hydraulic cylinder (2) of described accumulator (5) and two rod structures is provided with miniature pressure measuring tie-in M.
5. as the servo hydraulic cylinder control valve unit of claim 2 or 3 or 4 described hydraulic balance crystallizer gravity loads, it is characterized in that: be provided with safety valve (7) on described oil returning tube (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202441993U CN203335494U (en) | 2013-05-08 | 2013-05-08 | Servo hydraulic cylinder valve gear of hydraulic balance crystallizer weight loads |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202441993U CN203335494U (en) | 2013-05-08 | 2013-05-08 | Servo hydraulic cylinder valve gear of hydraulic balance crystallizer weight loads |
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| CN203335494U true CN203335494U (en) | 2013-12-11 |
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| CN2013202441993U Expired - Fee Related CN203335494U (en) | 2013-05-08 | 2013-05-08 | Servo hydraulic cylinder valve gear of hydraulic balance crystallizer weight loads |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104613024A (en) * | 2014-12-29 | 2015-05-13 | 广东工业大学 | Intelligent fuzzy control precision servo air pressure balance unloading system |
| CN105459438A (en) * | 2014-09-02 | 2016-04-06 | 天津市天锻压力机有限公司 | Powder hydraulic machine force control system based on Delta controller |
| CN105545829A (en) * | 2016-01-14 | 2016-05-04 | 浙江大学 | Multi-legged robot hydraulic drive unit capable of absorbing landing impact |
| CN109616001A (en) * | 2018-12-11 | 2019-04-12 | 上海应用技术大学 | Electro-hydraulic position servo system experimental bench |
| CN111237263A (en) * | 2020-01-09 | 2020-06-05 | 中国铁建重工集团股份有限公司 | Impact device for rock drill |
-
2013
- 2013-05-08 CN CN2013202441993U patent/CN203335494U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103244472B (en) * | 2013-05-08 | 2016-03-16 | 中国重型机械研究院股份公司 | A kind of servo hydraulic cylinder valve system of hydraulic balance crystallizer gravity load |
| CN105459438A (en) * | 2014-09-02 | 2016-04-06 | 天津市天锻压力机有限公司 | Powder hydraulic machine force control system based on Delta controller |
| CN104613024A (en) * | 2014-12-29 | 2015-05-13 | 广东工业大学 | Intelligent fuzzy control precision servo air pressure balance unloading system |
| CN104613024B (en) * | 2014-12-29 | 2017-05-31 | 广东工业大学 | A kind of Intelligent Fuzzy Control elaborate servo air pressure balance Load Relief System |
| CN105545829A (en) * | 2016-01-14 | 2016-05-04 | 浙江大学 | Multi-legged robot hydraulic drive unit capable of absorbing landing impact |
| CN105545829B (en) * | 2016-01-14 | 2017-11-14 | 浙江大学 | It can absorb the multi-foot robot hydraulic drive unit of Ground shock waves |
| CN109616001A (en) * | 2018-12-11 | 2019-04-12 | 上海应用技术大学 | Electro-hydraulic position servo system experimental bench |
| CN111237263A (en) * | 2020-01-09 | 2020-06-05 | 中国铁建重工集团股份有限公司 | Impact device for rock drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20190508 |