CN103042715A - Energy-saving control system and method of hydraulic machine - Google Patents
Energy-saving control system and method of hydraulic machine Download PDFInfo
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- CN103042715A CN103042715A CN2012105504443A CN201210550444A CN103042715A CN 103042715 A CN103042715 A CN 103042715A CN 2012105504443 A CN2012105504443 A CN 2012105504443A CN 201210550444 A CN201210550444 A CN 201210550444A CN 103042715 A CN103042715 A CN 103042715A
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Abstract
The invention discloses an energy-saving control system of a hydraulic machine. The energy-saving control system comprises a controller, a driver, a coder and a pressure sensor, wherein the controller is electrically connected with the driver to send preset values to the driver; the driver is electrically connected with both the coder and the pressure sensor to receive a rotating speed signal of a motor of the hydraulic machine obtained by the coder and a pressure signal of the hydraulic machine acquired by the pressure sensor, compare the rotating speed signal and the pressure signal with the preset values, and generate a control signal for adjusting the rotating speed of the motor of the hydraulic machine based on a comparison result. The invention also discloses a control method corresponding to the energy-saving control system of the hydraulic machine. The energy-saving control system and method of the hydraulic machine, disclosed by the invention, can realize pressure closed-loop control of the hydraulic machine, obtain better control effects and play the energy-saving effect.
Description
Technical field
The present invention relates to the control technology field of hydraulic press, more particularly, relates to a kind of hydraulic press energy-saving control system and method.
Background technology
Hydraulic press is that a kind of fluid pressure that utilizes comes transferring energy, to realize the lathe of various pressure processing crafts.Application along with new technology and new technology, the application of hydraulic press aspect metal processing and nonmetal shaping is more and more extensive, the share of occupying in machine industry is significantly soaring, and along with environmental protection, energy-conservation advocating, energy-saving hydraulic press just becomes a kind of development trend.
At present, in order to realize energy-saving effect, the following dual mode of the general employing of hydraulic press: 1, just after pressurize finishes motor is cut away, motor is opened during ftercompction to be needed again, ftercompction is cut away motor after finishing again.2, use frequency converter, the rotating speed that reduces motor by frequency converter reduces the power output of hydraulic pump, makes the power output of hydraulic pump and real-time load matched, reaches the effect of economize on electricity.
But the first power save mode because the starting of three phases motor electric current is 5-7 times of the motor rated current, if motor quality is bad, even can reach 10 times, and one-period is repeatedly opened motor, will increase energy consumption, and energy-saving effect is unsatisfactory.The second power save mode, because motor moves under lower-speed state, the rotating speed of radiator fan also reduces simultaneously, do not reach the effect of heat radiation, motor temperature will raise, and frequency converter is the rotating speed that changes motor by the change of frequency, have the acceleration, deceleration process, response speed is slow; Frequency converter output voltage is comprised of many spike trains, exists higher hamonic wave, produces easily noise.
Summary of the invention
In view of this, the invention provides a kind of hydraulic press energy-saving control system and method, to realize that hydraulic press is carried out pressure closed loop control, so that the control better effects if plays energy-conservation effect.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of hydraulic press energy-saving control system comprises: controller, driver, encoder and pressure inductor; Wherein:
Described controller is connected with described actuator electrical, sends preset value to described driver;
Described driver is electrically connected with described encoder and described pressure inductor, receive the tach signal of the hydraulic press motor that described encoder obtains and the pressure signal of the hydraulic press that described pressure inductor gathers, and described tach signal and pressure signal and described preset value compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result.
Preferably, described preset value is pressure preset value and flow preset value.
Preferably, described pressure inductor also is electrically connected with described controller, and the pressure signal of described hydraulic press is sent to described controller;
Described controller compares described pressure signal and pressure preset value, generates the control signal of control hydraulic pressure pump according to comparative result.
Preferably, also comprise the host computer that is electrically connected with described controller;
Set described preset value by described host computer, and described preset value is sent to described controller.
Preferably, carry out communication by RS232 between described host computer and the described controller.
Preferably, described driver comprises: the first receiving element, the first transmitting element and the first comparing unit; Wherein:
Described the first receiving element is electrically connected with described the first comparing unit, receive the tach signal of preset value that described controller sends, hydraulic press motor that described encoder obtains and the pressure signal of the hydraulic press that described pressure inductor gathers, and described preset value, tach signal and pressure signal are sent to described the first comparing unit;
Described the first comparing unit is electrically connected with described the first transmitting element, and described tach signal and pressure signal and described preset value are compared, and generates the control signal of adjusting the hydraulic press motor rotary speed according to comparative result;
Described the first transmitting element sends described control signal.
Preferably, described controller comprises: DA module, AD module, the second receiving element, the second transmitting element and the second comparing unit; Wherein:
Described the second receiving element is electrically connected with described DA module, receives the preset value that described host computer sends;
Described DA module is electrically connected with described the second transmitting element, and described DA module is converted to analog signal with the described preset value that described the second receiving element receives, and is sent to the first receiving element of described driver by described the second transmitting element;
Described the second receiving element also is electrically connected with described AD module, receives the pressure signal that described pressure inductor sends;
Described AD module is electrically connected with described the second comparing unit, and described AD module is converted to data signal with the described pressure signal that described the second receiving element receives, and is sent to described the second comparing unit;
Described the second comparing unit is electrically connected with described the second transmitting element, and described pressure signal and described pressure preset value are compared, and generates the control signal of adjusting the hydraulic pressure pump according to comparative result;
Described the second transmitting element is sent to described control signal the first receiving element of described driver.
Preferably, described hydraulic pressure pump comprises the first pump and the second pump;
When described pressure signal during greater than described pressure preset value, the control signal that generates according to comparative result is controlled described the first pump and is quit work;
When described pressure signal during less than described pressure preset value, the control signal that generates according to comparative result controls described the first pump and the second pump is all worked.
A kind of hydraulic press energy-saving control method is applied to comprise in the described hydraulic press energy-saving control system:
Obtain preset value;
Obtain the tach signal of hydraulic press motor and the pressure signal of hydraulic press;
Described tach signal and pressure signal and described preset value are compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result.
Preferably, the described preset value that obtains is specially:
Set described preset value by host computer.
Preferably, describedly obtain the tach signal of hydraulic press motor and the pressure signal of hydraulic press is specially:
Obtain the tach signal of hydraulic press motor by encoder;
Gather the pressure signal of hydraulic press by pressure inductor.
Preferably, described described tach signal and pressure signal and described preset value are compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result and be specially:
The controller that is electrically connected with described host computer receives the described preset value of setting by host computer, and described preset value is sent to the driver that is electrically connected with it;
Described driver is electrically connected with described encoder and described pressure inductor, receive the tach signal of the hydraulic press motor that described encoder obtains and the pressure signal of the hydraulic press that described pressure inductor gathers, and described tach signal and pressure signal and described preset value compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result.
Preferably, described preset value is pressure preset value and flow preset value.
Preferably, described described tach signal and pressure signal and described preset value are compared, also comprise after generating the control signal of adjusting the hydraulic press motor rotary speed according to comparative result:
Obtain the pressure signal of hydraulic press, described pressure signal and pressure preset value are compared, generate the control signal of control hydraulic pressure pump according to comparative result.
Preferably, the described pressure signal that obtains hydraulic press compares described pressure signal and pressure preset value, and the control signal that generates control hydraulic pressure pump according to comparative result is specially:
Described pressure inductor is sent to described controller with the pressure signal of described hydraulic press;
Described controller compares described pressure signal and pressure preset value, generates the control signal of control hydraulic pressure pump according to comparative result.
Can find out that from above-mentioned technical scheme a kind of hydraulic press energy-saving control system disclosed by the invention obtains the tach signal of hydraulic press motor by encoder, and tach signal is sent to driver; Gather the pressure signal of hydraulic press by pressure inductor, and pressure signal is sent to driver; Driver compares the tach signal that receives and pressure signal and preset value, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result, thereby the pressure of control hydraulic press has been realized the closed-loop control of hydraulic press pressure, so that the control better effects if has played energy-conservation effect.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the disclosed a kind of hydraulic press energy-saving control system of the embodiment of the invention;
Fig. 2 is the structural representation of the disclosed a kind of hydraulic press energy-saving control system of another embodiment of the present invention;
Fig. 3 is the structural representation that hydraulic press energy-saving control system disclosed by the invention is applied to hydraulic press;
Fig. 4 is the disclosed a kind of hydraulic press energy-saving control method flow chart of the embodiment of the invention;
Fig. 5 is the disclosed a kind of hydraulic press energy-saving control method flow chart of another embodiment of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention discloses a kind of hydraulic press energy-saving control system and method, to realize that hydraulic press is carried out pressure closed loop control, so that the control better effects if plays energy-conservation effect.
A kind of hydraulic press energy-saving control system comprises: controller 11, driver 12, encoder 13 and pressure inductor 14 as shown in Figure 1; Wherein:
Concrete, described preset value is pressure preset value and flow preset value.
In the above-described embodiments, encoder 13 obtains the tach signal of hydraulic press motor, and tach signal is sent to driver 12; Pressure inductor 14 gathers the pressure signal of hydraulic press, and pressure signal is sent to driver 12;
The first receiving element in the driver 12 is electrically connected with the first comparing unit, receive the pressure signal that preset value that controller 11 sends, tach signal that encoder 13 sends and pressure inductor 14 send, and described preset value, tach signal and pressure signal are sent to the first comparing unit in the driver 12;
The first comparing unit in the driver 12 is electrically connected with the first transmitting element in the driver 12, tach signal and pressure signal and preset value are compared, and generate to adjust the control signal of hydraulic press motor rotary speed according to comparative result, thereby the pump in the control hydraulic press is adjusted the pressure of hydraulic press, realization is to the closed-loop control of pressure, so that the control better effects if has played energy-conservation effect.
Another embodiment of the present invention also discloses a kind of hydraulic press energy-saving control system, comprising: controller 21, driver 22, encoder 23, pressure inductor 24 and host computer 25; Wherein:
Concrete, described preset value is pressure preset value and flow preset value;
Concrete, on the basis of above-described embodiment, in the present embodiment, the second receiving element in the controller 21 is electrically connected the preset value of reception host computer 25 transmissions with DA module in the controller 21;
The DA module is electrically connected with the second transmitting element in the controller 21, and the preset value that the DA module receives the second receiving element is converted to analog signal by digital-to-analogue conversion, sends the first receiving element of driver 22 by the second transmitting element;
The second receiving element of controller 21 also is electrically connected with the AD module of controller 21, receives the pressure signal that pressure inductor 24 sends;
The AD module is electrically connected with the second comparing unit, and the AD module is passed through analog-to-digital conversion with the pressure signal that the second receiving element receives, and is converted to data signal, and is sent to the second comparing unit;
The second comparing unit is electrically connected with the second transmitting element, and described pressure signal and described pressure preset value are compared, and generates the control signal of adjusting the hydraulic pressure pump according to comparative result;
Concrete hydraulic pressure pump comprises the first pump and the second pump, and wherein the first pump is large pump, and the second pump is little pump, and when described pressure signal during greater than described pressure preset value, the control signal that generates according to comparative result is controlled the first pump (large pump) and quit work; When described pressure signal during less than described pressure preset value, the control signal that generates according to comparative result controls the first pump (large pump) and the second pump (little pump) is all worked.
As shown in Figure 3, for hydraulic press energy-saving control system disclosed by the invention is applied to the structural representation of hydraulic press, comprise host computer 31, controller 32, driver 33, pressure sensor 34, encoder 35, motor 36, pump 37, oil circuit valve plate 38 and oil cylinder 39; Wherein:
In the whole control system structure, the user sets technological parameter in the man-machine interface of host computer 31, be transferred to controller 32 by RS232, controller 32 is passed to driver 33 by the DA conversion with control signal, speed and the position of driver 33 control motors 36, change in real time speed and the position of motor 36 according to the condition of production, if deviation appears in speed or position, at this moment by encoder 35 with motor 36 data feedbacks that gather to driver 32, by driver 32 governor motors 36 needed speed and positions, the whole production of working good.Simultaneously, the actual pressure of pressure inductor 34 real-time monitoring systems, and data are passed to driver 32, and form a closed-loop system at this, allow the motor 36 real-time situations according to pump regulate best speed and position.
In addition, system's actual pressure that pressure inductor 34 monitors is also passed to controller 32, so that controller 32 is done the control of duplex pump, in the servo-drive system, pump 37 uses duplex pump (large pump+little pump), motor 36 drives two pumps simultaneously, when system pressure is low (＜70bar), large pump and little pump are jointly to system's oil cylinder 39 fuel feeding, when system pressure is elevated to set pressure (70bar), large pump is through valve off-load oil sump tank, and only continued to system's oil cylinder 39 fuel feeding by little pump, on the value that hydraulic system pressure is remained on set up.
As shown in Figure 4, be the disclosed a kind of hydraulic press energy-saving control method flow chart of the embodiment of the invention, comprise:
S101, obtain preset value;
Concrete, set preset value by host computer, preset value is pressure preset value and flow preset value.
S102, obtain the tach signal of hydraulic press motor and the pressure signal of hydraulic press;
Be specially, obtain the tach signal of hydraulic press motor by encoder; Gather the pressure signal of hydraulic press by pressure inductor.
S103, described tach signal and pressure signal and described preset value are compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result;
Concrete, the controller that is electrically connected with described host computer receives the described preset value of setting by host computer, and described preset value is sent to the driver that is electrically connected with it;
Described driver is electrically connected with described encoder and described pressure inductor, receive the tach signal of the hydraulic press motor that described encoder obtains and the pressure signal of the hydraulic press that described pressure inductor gathers, and described tach signal and pressure signal and described preset value compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result.
As shown in Figure 5, be the disclosed a kind of hydraulic press energy-saving control method flow chart of another embodiment of the present invention, comprise:
S201, obtain preset value;
Concrete, set preset value by host computer, preset value is pressure preset value and flow preset value.
S202, obtain the tach signal of hydraulic press motor and the pressure signal of hydraulic press;
Obtain the tach signal of hydraulic press motor by encoder;
Gather the pressure signal of hydraulic press by pressure inductor.
S203, described tach signal and pressure signal and described preset value are compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result;
Concrete, the controller that is electrically connected with described host computer receives the described preset value of setting by host computer, and described preset value is sent to the driver that is electrically connected with it;
Described driver is electrically connected with described encoder and described pressure inductor, receive the tach signal of the hydraulic press motor that described encoder obtains and the pressure signal of the hydraulic press that described pressure inductor gathers, and described tach signal and pressure signal and described preset value compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result;
S204, obtain the pressure signal of hydraulic press, described pressure signal and pressure preset value are compared, generate the control signal of control hydraulic pressure pump according to comparative result;
Concrete, pressure inductor is sent to controller with the pressure signal of described hydraulic press, and controller compares described pressure signal and pressure preset value, generates the control signal of control hydraulic pressure pump according to comparative result.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (15)
1. a hydraulic press energy-saving control system is characterized in that, comprising: controller, driver, encoder and pressure inductor; Wherein:
Described controller is connected with described actuator electrical, sends preset value to described driver;
Described driver is electrically connected with described encoder and described pressure inductor, receive the tach signal of the hydraulic press motor that described encoder obtains and the pressure signal of the hydraulic press that described pressure inductor gathers, and described tach signal and pressure signal and described preset value compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result.
2. control system according to claim 1 is characterized in that, described preset value is pressure preset value and flow preset value.
3. system according to claim 1 is characterized in that, described pressure inductor also is electrically connected with described controller, and the pressure signal of described hydraulic press is sent to described controller;
Described controller compares described pressure signal and pressure preset value, generates the control signal of control hydraulic pressure pump according to comparative result.
4. system according to claim 3 is characterized in that, also comprises the host computer that is electrically connected with described controller;
Set described preset value by described host computer, and described preset value is sent to described controller.
5. system according to claim 4 is characterized in that, carries out communication by RS232 between described host computer and the described controller.
6. system according to claim 5 is characterized in that, described driver comprises: the first receiving element, the first transmitting element and the first comparing unit; Wherein:
Described the first receiving element is electrically connected with described the first comparing unit, receive the tach signal of preset value that described controller sends, hydraulic press motor that described encoder obtains and the pressure signal of the hydraulic press that described pressure inductor gathers, and described preset value, tach signal and pressure signal are sent to described the first comparing unit;
Described the first comparing unit is electrically connected with described the first transmitting element, and described tach signal and pressure signal and described preset value are compared, and generates the control signal of adjusting the hydraulic press motor rotary speed according to comparative result;
Described the first transmitting element sends described control signal.
7. system according to claim 6 is characterized in that, described controller comprises: DA module, AD module, the second receiving element, the second transmitting element and the second comparing unit; Wherein:
Described the second receiving element is electrically connected with described DA module, receives the preset value that described host computer sends;
Described DA module is electrically connected with described the second transmitting element, and described DA module is converted to analog signal with the described preset value that described the second receiving element receives, and is sent to the first receiving element of described driver by described the second transmitting element;
Described the second receiving element also is electrically connected with described AD module, receives the pressure signal that described pressure inductor sends;
Described AD module is electrically connected with described the second comparing unit, and described AD module is converted to data signal with the described pressure signal that described the second receiving element receives, and is sent to described the second comparing unit;
Described the second comparing unit is electrically connected with described the second transmitting element, and described pressure signal and described pressure preset value are compared, and generates the control signal of adjusting the hydraulic pressure pump according to comparative result;
Described the second transmitting element is sent to described control signal the first receiving element of described driver.
8. system according to claim 7 is characterized in that, described hydraulic pressure pump comprises the first pump and the second pump;
When described pressure signal during greater than described pressure preset value, the control signal that generates according to comparative result is controlled described the first pump and is quit work;
When described pressure signal during less than described pressure preset value, the control signal that generates according to comparative result controls described the first pump and the second pump is all worked.
9. a hydraulic press energy-saving control method is applied to it is characterized in that as in each described hydraulic press energy-saving control system of claim 1 to 8, comprising:
Obtain preset value;
Obtain the tach signal of hydraulic press motor and the pressure signal of hydraulic press;
Described tach signal and pressure signal and described preset value are compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result.
10. method according to claim 9 is characterized in that, the described preset value that obtains is specially:
Set described preset value by host computer.
11. method according to claim 10 is characterized in that, describedly obtains the tach signal of hydraulic press motor and the pressure signal of hydraulic press is specially:
Obtain the tach signal of hydraulic press motor by encoder;
Gather the pressure signal of hydraulic press by pressure inductor.
12. method according to claim 11 is characterized in that, described described tach signal and pressure signal and described preset value is compared, and generates the control signal of adjusting the hydraulic press motor rotary speed according to comparative result and is specially:
The controller that is electrically connected with described host computer receives the described preset value of setting by host computer, and described preset value is sent to the driver that is electrically connected with it;
Described driver is electrically connected with described encoder and described pressure inductor, receive the tach signal of the hydraulic press motor that described encoder obtains and the pressure signal of the hydraulic press that described pressure inductor gathers, and described tach signal and pressure signal and described preset value compared, generate the control signal of adjusting the hydraulic press motor rotary speed according to comparative result.
13. method according to claim 12 is characterized in that, described preset value is pressure preset value and flow preset value.
14. method according to claim 13 is characterized in that, described described tach signal and pressure signal and described preset value is compared, and also comprises after generating the control signal of adjusting the hydraulic press motor rotary speed according to comparative result:
Obtain the pressure signal of hydraulic press, described pressure signal and pressure preset value are compared, generate the control signal of control hydraulic pressure pump according to comparative result.
15. method according to claim 14 is characterized in that, the described pressure signal that obtains hydraulic press compares described pressure signal and pressure preset value, and the control signal that generates control hydraulic pressure pump according to comparative result is specially:
Described pressure inductor is sent to described controller with the pressure signal of described hydraulic press;
Described controller compares described pressure signal and pressure preset value, generates the control signal of control hydraulic pressure pump according to comparative result.
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| CN103669463A (en) * | 2013-12-03 | 2014-03-26 | 中联重科股份有限公司渭南分公司 | Acceleration control method and device of hydraulic rotation system and excavator |
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| TWI732664B (en) * | 2020-08-26 | 2021-07-01 | 陳永嘉 | Device for counting revolutions of a motor of a fluid vending machine |
| CN114198289A (en) * | 2021-12-16 | 2022-03-18 | 杭州电子科技大学 | Dual-pump control method of permanent magnet synchronous motor hydraulic system |
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