CN204716670U - The closed-loop automatic control mechanism of hydraulic system - Google Patents
The closed-loop automatic control mechanism of hydraulic system Download PDFInfo
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- CN204716670U CN204716670U CN201520460497.5U CN201520460497U CN204716670U CN 204716670 U CN204716670 U CN 204716670U CN 201520460497 U CN201520460497 U CN 201520460497U CN 204716670 U CN204716670 U CN 204716670U
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Abstract
The utility model discloses a kind of closed-loop automatic control mechanism of hydraulic system, belong to hydraulic system technical field.The closed-loop automatic control mechanism of hydraulic system of the present utility model, comprise solenoid valve, motor, oil hydraulic pump and pressure transducer, also comprise PLC and PLC correction module, PLC outputs signal to solenoid valve in parallel and motor to be carried out hydraulic control pump and carries out reciprocating stroke action to hydraulic press; Hydraulic press passes through pressure transducer output oil pressure pressure signal to PLC, oil pressure pressure signal inputs solenoid valve and motor again after PLC correction module corrects, with hydraulic control pump, reciprocating stroke action is carried out to hydraulic press, complete the closed-loop automatic control of whole mechanism.The utility model is by optimizing the automatic control of hydraulic system, and the power consumption achieving hydraulic system is low, oil temperature is low and the object of element long service life.
Description
Technical field
The utility model relates to hydraulic system technical field, more particularly, relates to a kind of closed-loop automatic control mechanism of hydraulic system.
Background technique
The application of hydraulic system in mechanical device and equipment is very extensive, there is multiple energy conversion, easily occur power consumption in hydraulic transmission process, high oil temperature and the harmful effect such as original paper working life is too short, thus causes manufacturing efficiency to reduce, and manufacture cost is too high.
Hydraulic system major part belongs to a kind of open-loop control system, and based on transferring power, transmission of information is auxiliary, and its Mass Control is large by the impact of operation conditions change.Even if some have employed closed loop control system, but its switching value and Analog control are main or realized by the electronic circuit of relay, contactor or discrete component, have that volume is large, power consumption is many, wiring is complicated, poor reliability, maintenance difficult, be difficult to the shortcomings such as the control overflow that adapts to often change.
Chinese Patent Application No.: 200820088071.1, publication date: on April 29th, 2009, invention and created name is: a kind of computer close-loop control adaptive load type hydraulic system, comprise Oil pump electrical machinery group, Oil pump electrical machinery group connects servo-cylinder through servovalve, hydraulic system is also provided with closed control circuit, closed control circuit is by pressure transducer, signal amplification circuit, analog to digital conversion circuit, process control machine, D/A converting circuit and proportional pressure control valve composition, pressure transducer input end connects servo-cylinder, pressure transducer output terminal is through signal amplification circuit connection mode number conversion circuit input end, analog to digital conversion circuit output terminal is connected process control machine respectively with D/A converting circuit input end, D/A converting circuit output terminal connects proportional pressure control valve and servovalve respectively, proportional pressure control valve connects Oil pump electrical machinery group.This model utility achieves the computer-based adaptive control of the most high output pressure of hydraulic system, but this application case deficiency is the device delivery pressure not being carried out to corresponding correction, although can self adaptive control, the disturbing factor of delivery pressure not be processed accordingly.
Model utility content
1. the model utility technical problem that will solve
Have that volume is large, power consumption is many, wiring is complicated for hydraulic system in prior art, the problem of the disturbing factor of poor reliability and delivery pressure, the invention provides a kind of closed-loop automatic control mechanism of hydraulic system, by optimizing the automatic control of hydraulic system, the power consumption achieving hydraulic system is low, oil temperature is low and the object of element long service life.
2. technological scheme
For achieving the above object, the technological scheme that the utility model provides is:
A kind of closed-loop automatic control mechanism of hydraulic system, comprise solenoid valve, motor, oil hydraulic pump and pressure transducer, also comprise PLC and PLC correction module, PLC outputs signal to solenoid valve in parallel and motor to be carried out hydraulic control pump and carries out reciprocating stroke action to hydraulic press; Hydraulic press passes through pressure transducer output oil pressure pressure signal to PLC, oil pressure pressure signal inputs solenoid valve and motor again after PLC correction module corrects, with hydraulic control pump, reciprocating stroke action is carried out to hydraulic press, complete the closed-loop automatic control of whole mechanism.
Further improve as the utility model, motor is actuating motor, and PLC output signal first amplifies rear actuating motor by servo driver and pressure controller and solenoid valve receives respectively again.
Further improve as the utility model, oil hydraulic pump exports to PLC by the local signal of its disturbance by another pressure transducer.
Further improve as the utility model, oil hydraulic pump is arranged on exporting to another PLC, PLC correction module to the local signal of its disturbance by another pressure transducer between 2 PLC, and three is series relationship.
Further improve as the utility model, whole mechanism also comprises display unit, and display unit is connected with PLC tandem.
3. beneficial effect
The technological scheme adopting the utility model to provide, compared with prior art, has following beneficial effect:
(1) the closed-loop automatic control mechanism of hydraulic system of the present utility model, during normal work, hydraulic oil is flowed to oil hydraulic pump by motor, then controls original paper through solenoid valve etc., by control loop, discharge pressure is to hydraulic press (i.e. the process of hydraulic energy conversioning mechanical energy).When pressure or rotating speed are disturbed signal, its information is fed back to comparing element by feedback elements (pressure transducer) and corrects on original paper (PLC and PLC correction module) by system automatically, produce deviation and correct, draw approximate expected value, be transferred to actuating device (motor, solenoid valve), output signal again finally by control object, complete the closed-loop automatic control of whole mechanism, by optimizing the automatic control of hydraulic system, the power consumption achieving hydraulic system is low, oil temperature is low and the object of element long service life;
(2) the closed-loop automatic control mechanism of hydraulic system of the present utility model, motor is actuating motor, and by servo driver and pressure controller amplifying signal, more accurate to the correction of pressure;
(3) the closed-loop automatic control mechanism of hydraulic system of the present utility model, the setting of 2 pressure transducers, avoids interfering with each other of sensor signal, affects the judgement of PLC;
(4) the closed-loop automatic control mechanism of hydraulic system of the present utility model, when control point is too much, the setting of 2 PLC can effectively avoid single plc data process to affect the operation of whole mechanism not in time;
(5) the closed-loop automatic control mechanism of hydraulic system of the present utility model, the setting of display unit, makes the control of whole mechanism more directly perceived.
(6) the closed-loop automatic control mechanism of hydraulic system of the present utility model; the new technologies such as the servo-control system of employing electromechanical integration and pressure transducer, PLC correction module, closed-loop communication; make that the oil temperature of whole system reduces, noise diminishes, the wearing and tearing of Sealing, hydraulic element reduce; working life extends; reduce downtime rate; save the expense of maintenance and renewal part, allow manufacturing efficiency and benefit be greatly improved.
Accompanying drawing explanation
Fig. 1 is control principle drawing of the present utility model.
Label declaration in schematic diagram: 8, hydraulic press; 11, display unit; 12, PLC; 13, PLC correction module; 14, pressure controller; 15, solenoid valve; 16, servo driver; 17, motor; 18, oil hydraulic pump; 19, pressure transducer;
Embodiment
For understanding content of the present utility model further, by reference to the accompanying drawings the utility model is described in detail.
Embodiment 1
The closed-loop automatic control mechanism of the hydraulic system of the present embodiment, comprise solenoid valve 15, motor 17, oil hydraulic pump 18 and pressure transducer 19, also comprise PLC12 and PLC correction module 13, wherein: PLC12 outputs signal to solenoid valve 15 in parallel and motor 17 hydraulic control pump 18 pairs of hydraulic presses 8 carry out reciprocating stroke action; Hydraulic press 8 passes through pressure transducer 19 output oil pressure pressure signal to PLC12, oil pressure pressure signal inputs solenoid valve 15 and motor 17 again after PLC correction module 13 corrects, carry out reciprocating stroke action with hydraulic control pump 18 pairs of hydraulic presses 8, complete the closed-loop automatic control of whole mechanism.
During normal work, hydraulic oil is flowed to oil hydraulic pump 18 by motor 17, then controls original paper through solenoid valve 15 etc., and by control loop, discharge pressure is to hydraulic press 8 (i.e. the process of hydraulic energy conversioning mechanical energy).When pressure or rotating speed are disturbed signal, its information is fed back to comparing element by feedback elements (pressure transducer 14) and corrects on original paper (PLC12 and PLC correction module 13) by system automatically, produce deviation and correct, draw approximate expected value, be transferred to actuating device (motor 17, solenoid valve 15), output signal again finally by control object, complete the closed-loop automatic control of whole mechanism, by optimizing the automatic control of hydraulic system, the power consumption achieving hydraulic system is low, oil temperature is low and the object of element long service life.
Embodiment 2
The closed-loop automatic control mechanism of the hydraulic system of the present embodiment, basic structure is with embodiment 1, and improvements are: as shown in Figure 1, also comprises display unit 11, and be liquid crystal display in the present embodiment, liquid crystal display is connected with PLC12 tandem; Motor 17 is actuating motor, and PLC12 output signal first amplifies rear actuating motor by servo driver 16 and pressure controller 14 and solenoid valve 15 receives respectively again; Oil hydraulic pump 18 exports to PLC12 by the local signal of its disturbance by another pressure transducer 19.
The closed-loop automatic control mechanism of the hydraulic system of the present embodiment, motor 17 is actuating motor, and by servo driver and pressure controller amplifying signal, more accurate to the correction of pressure; The setting of 2 pressure transducers 19, avoids interfering with each other of sensor signal, affects the judgement of PLC; Display unit is liquid crystal display, makes the control of whole mechanism more directly perceived.
The closed-loop automatic control mechanism of the hydraulic system of the present embodiment; the new technologies such as the servo-control system of employing electromechanical integration and pressure transducer, PLC correction module, closed-loop communication; make that the oil temperature of whole system reduces, noise diminishes, the wearing and tearing of Sealing, hydraulic element reduce; working life extends; reduce downtime rate; save the expense of maintenance and renewal part, allow manufacturing efficiency and benefit be greatly improved.
Embodiment 3
The closed-loop automatic control mechanism of the hydraulic system of the present embodiment, basic structure is with embodiment 1, improvements are: also comprise display unit 11, be liquid crystal display in the present embodiment, oil hydraulic pump 18 exports to another PLC12 by the local signal of its disturbance by another pressure transducer 19, PLC correction module 13 is arranged between 2 PLC12, and three is series relationship.
The closed-loop automatic control mechanism of the hydraulic system of the present embodiment, when control point is too much, the setting of 2 PLC can effectively avoid single plc data process to affect the operation of whole mechanism not in time.
Schematically above be described the utility model and mode of execution thereof, this description does not have restricted, and also just one of the mode of execution of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the utility model and creating aim, design the mode of structure similar to this technological scheme and embodiment without creationary, protection domain of the present utility model all should be belonged to.
Claims (5)
1. the closed-loop automatic control mechanism of a hydraulic system, comprise solenoid valve (15), motor (17), oil hydraulic pump (18) and pressure transducer (19), it is characterized in that: also comprise PLC (12) and PLC correction module (13), wherein:
Described PLC (12) outputs signal to solenoid valve (15) in parallel and motor (17) hydraulic control pump (18) carries out reciprocating stroke action to hydraulic press (8);
Described hydraulic press (8) by pressure transducer (19) output oil pressure pressure signal to PLC (12), oil pressure pressure signal inputs solenoid valve (15) and motor (17) again after PLC correction module (13) corrects, with hydraulic control pump (18), reciprocating stroke action is carried out to hydraulic press (8), complete the closed-loop automatic control of whole mechanism.
2. the closed-loop automatic control mechanism of hydraulic system according to claim 1, it is characterized in that: described motor (17) is actuating motor, PLC (12) output signal first amplifies rear actuating motor by servo driver (16) and pressure controller (14) and solenoid valve (15) receives respectively again.
3. the closed-loop automatic control mechanism of hydraulic system according to claim 1 and 2, is characterized in that: described oil hydraulic pump (18) exports to PLC (12) by the local signal of its disturbance by another pressure transducer (19).
4. the closed-loop automatic control mechanism of hydraulic system according to claim 1 and 2, it is characterized in that: described oil hydraulic pump (18) exports to another PLC (12) by the local signal of its disturbance by another pressure transducer (19), PLC correction module (13) is arranged between 2 PLC (12), and three is series relationship.
5. the closed-loop automatic control mechanism of hydraulic system according to claim 4, is characterized in that: also comprise display unit (11), and display unit (11) is connected with PLC (12) tandem.
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| CN201520460497.5U CN204716670U (en) | 2015-06-29 | 2015-06-29 | The closed-loop automatic control mechanism of hydraulic system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545371A (en) * | 2015-12-29 | 2016-05-04 | 中国航空工业集团公司沈阳发动机设计研究所 | Gas turbine blade angle control system |
| CN106079514A (en) * | 2016-08-22 | 2016-11-09 | 仪征雄伟机械科技有限公司 | A kind of auto parts and components air-bend die stable-pressure device |
| CN106239968A (en) * | 2016-08-22 | 2016-12-21 | 仪征雄伟机械科技有限公司 | A kind of multiparty control automobile component air-bend die device |
-
2015
- 2015-06-29 CN CN201520460497.5U patent/CN204716670U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545371A (en) * | 2015-12-29 | 2016-05-04 | 中国航空工业集团公司沈阳发动机设计研究所 | Gas turbine blade angle control system |
| CN106079514A (en) * | 2016-08-22 | 2016-11-09 | 仪征雄伟机械科技有限公司 | A kind of auto parts and components air-bend die stable-pressure device |
| CN106239968A (en) * | 2016-08-22 | 2016-12-21 | 仪征雄伟机械科技有限公司 | A kind of multiparty control automobile component air-bend die device |
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