CN103042715B - Hydraulic press energy-saving control system and method - Google Patents
Hydraulic press energy-saving control system and method Download PDFInfo
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- CN103042715B CN103042715B CN201210550444.3A CN201210550444A CN103042715B CN 103042715 B CN103042715 B CN 103042715B CN 201210550444 A CN201210550444 A CN 201210550444A CN 103042715 B CN103042715 B CN 103042715B
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Abstract
The invention discloses a kind of hydraulic press energy-saving control system, comprising: controller, driver, encoder and pressure inductor; Wherein: controller is connected with actuator electrical, preset value is sent to driver; Driver is electrically connected with encoder and pressure inductor, the pressure signal of the hydraulic press that the tach signal of the hydraulic press motor that received code device obtains and pressure inductor gather, and tach signal and pressure signal and preset value are compared, the control signal of adjustment hydraulic press motor rotary speed is generated according to comparative result.The invention also discloses the control method corresponding with hydraulic press energy-saving control system.The present invention can realize carrying out pressure closed loop control to hydraulic press, makes control effects better, plays energy-conservation 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 one utilizes fluid pressure to carry out transferring energy, to realize the lathe of various pressure processing craft.Along with the application of new technology and new technology, the application of hydraulic press in intermetallic composite coating and nonmetal shaping is more and more extensive, the share of occupying in machine industry significantly rises, 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, hydraulic press generally adopts following two kinds of modes: 1, just cut away by motor after pressurize terminates, and is opened by motor again, cut away by motor after ftercompction terminates again when needs ftercompction.2, use frequency converter, reduced the power output of the rotating speed reduction hydraulic pump of motor by frequency converter, the power output of hydraulic pump is mated with real time load, reaches the effect of economize on electricity.
But the first power save mode, because starting of three phases motor electric current is 5-7 times of Rated motor electric current, if motor quality is bad, even can reach 10 times, one-period repeatedly opens motor, and will increase energy consumption, energy-saving effect is unsatisfactory.The second power save mode, because motor runs 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 being changed motor by the change of frequency, there is acceleration, deceleration process, response speed is slow; Frequency converter output voltage is made up of many spike trains, there is higher hamonic wave, easily produces 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 carrying out pressure closed loop control to hydraulic press, make control effects better, play 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, 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 pressure signal of the tach signal of the hydraulic press motor that described encoder obtains and the hydraulic press of described pressure inductor collection, and described tach signal and pressure signal and described preset value are compared, the control signal of adjustment hydraulic press motor rotary speed is generated according to comparative result.
Preferably, described preset value is pressure preset value and flow preset value.
Preferably, described pressure inductor is also electrically connected with described controller, and the pressure signal of described hydraulic press is sent to described controller;
Described pressure signal and pressure preset value compare by described controller, generate the control signal of hydraulic control pump according to comparative result.
Preferably, the host computer be electrically connected with described controller is also comprised;
Set described preset value by described host computer, and described preset value is sent to described controller.
Preferably, communication is carried out by RS232 between described host computer and described controller.
Preferably, described driver comprises: the first receiving element, the first transmitting element and the first comparing unit; Wherein:
Described first receiving element is electrically connected with described first comparing unit, receive preset value, the tach signal of hydraulic press motor of described encoder acquisition and the pressure signal of the hydraulic press of described pressure inductor collection that described controller sends, and described preset value, tach signal and pressure signal are sent to described first comparing unit;
Described first comparing unit is electrically connected with described first transmitting element, described tach signal and pressure signal and described preset value is compared, and generates the control signal of adjustment hydraulic press motor rotary speed according to comparative result;
Described first transmitting element sends described control signal.
Preferably, described controller comprises: D/A module, A/D module, the second receiving element, the second transmitting element and the second comparing unit; Wherein:
Described second receiving element is electrically connected with described D/A module, receives the preset value that described host computer sends;
Described D/A module is electrically connected with described second transmitting element, and the described preset value that described second receiving element receives is converted to analog signal by described D/A module, is sent to the first receiving element of described driver by described second transmitting element;
Described second receiving element is also electrically connected with described A/D module, receives the pressure signal that described pressure inductor sends;
Described A/D module is electrically connected with described second comparing unit, and the described pressure signal that described second receiving element receives is converted to data signal by described A/D module, and is sent to described second comparing unit;
Described second comparing unit is electrically connected with described second transmitting element, described pressure signal and described pressure preset value is compared, and generates the control signal of adjustment hydraulic pressure pump according to comparative result;
Described control signal is sent to the first receiving element of described driver by described second transmitting element.
Preferably, described hydraulic pressure pump comprises the first pump and the second pump;
When described pressure signal is greater than described pressure preset value, quit work according to described first pump of control signal control that comparative result generates;
When described pressure signal is less than described pressure preset value, control signal described first pump of control generated according to comparative result and the second pump all work.
A kind of hydraulic press energy-saving control method, is applied in described hydraulic press energy-saving control system, comprises:
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, generates the control signal of adjustment hydraulic press motor rotary speed according to comparative result.
Preferably, described acquisition preset value is specially:
Described preset value is set by host computer.
Preferably, the described tach signal of acquisition hydraulic press motor and the pressure signal of hydraulic press are specially:
The tach signal of hydraulic press motor is obtained by encoder;
The pressure signal of hydraulic press is gathered by pressure inductor.
Preferably, describedly described tach signal and pressure signal and described preset value to be compared, the control signal generating adjustment hydraulic press motor rotary speed according to comparative result is specially:
The controller be electrically connected with described host computer receives the described preset value set by host computer, and described preset value is sent to the driver be connected electrically;
Described driver is electrically connected with described encoder and described pressure inductor, receive the pressure signal of the tach signal of the hydraulic press motor that described encoder obtains and the hydraulic press of described pressure inductor collection, and described tach signal and pressure signal and described preset value are compared, the control signal of adjustment hydraulic press motor rotary speed is generated 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 to be compared, also comprise generate the control signal of adjustment hydraulic press motor rotary speed according to comparative result after:
Obtain the pressure signal of hydraulic press, described pressure signal and pressure preset value are compared, generate the control signal of hydraulic control pump according to comparative result.
Preferably, the pressure signal of described acquisition hydraulic press, compares described pressure signal and pressure preset value, and the control signal generating hydraulic control pump according to comparative result is specially:
The pressure signal of described hydraulic press is sent to described controller by described pressure inductor;
Described pressure signal and pressure preset value compare by described controller, generate the control signal of hydraulic control pump according to comparative result.
As can be seen from above-mentioned technical scheme, a kind of hydraulic press energy-saving control system disclosed by the invention, is obtained the tach signal of hydraulic press motor, and tach signal is sent to driver by encoder; Gathered the pressure signal of hydraulic press by pressure inductor, and pressure signal is sent to driver; The tach signal received and pressure signal and preset value compare by driver, the control signal of adjustment hydraulic press motor rotary speed is generated according to comparative result, thus the pressure of hydraulic control machine, achieve the closed-loop control of hydraulic press pressure, make control effects better, serve energy-conservation effect.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of Fig. 1 a kind of hydraulic press energy-saving control system disclosed in the embodiment of the present invention;
The structural representation of Fig. 2 a kind of hydraulic press energy-saving control system disclosed in 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 a kind of hydraulic press energy-saving control method flow chart disclosed in the embodiment of the present invention;
Fig. 5 is a kind of hydraulic press energy-saving control method flow chart disclosed in another embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of hydraulic press energy-saving control system and method, to realize carrying out pressure closed loop control to hydraulic press, make control effects better, play energy-conservation effect.
A hydraulic press energy-saving control system as shown in Figure 1, comprising: controller 11, driver 12, encoder 13 and pressure inductor 14; Wherein:
Controller 11 is electrically connected with driver 12, sends preset value to driver 12;
Driver 12 is electrically connected with encoder 13 and pressure inductor 14, the pressure signal of the hydraulic press that the tach signal of the hydraulic press motor that received code device 13 obtains and pressure inductor 14 gather, and described tach signal and pressure signal and described preset value are compared, the control signal of adjustment hydraulic press motor rotary speed is generated according to comparative result.
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 driver 12 is electrically connected with the first comparing unit, receive preset value, the tach signal of encoder 13 transmission and the pressure signal of pressure inductor 14 transmission that controller 11 sends, and described preset value, tach signal and pressure signal are sent to the first comparing unit in driver 12;
The first comparing unit in driver 12 is electrically connected with the first transmitting element in driver 12, tach signal and pressure signal and preset value are compared, and the control signal of adjustment hydraulic press motor rotary speed is generated according to comparative result, thus the pump in hydraulic control machine adjusts the pressure of hydraulic press, realize the closed-loop control to pressure, make control effects better, serve 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:
Host computer 25 is electrically connected with controller 21, by setting preset value in host computer 25, and carries out communication by RS232 preset value is sent to controller 21;
Controller 21 is electrically connected with driver 22, and the preset value received is sent to driver 22;
Driver 22 is electrically connected with encoder 23 and pressure inductor 24, the pressure signal of the hydraulic press that the tach signal of the hydraulic press motor that received code device 23 obtains and pressure inductor 24 gather, and described tach signal and pressure signal and described preset value are compared, the control signal of adjustment hydraulic press motor rotary speed is generated according to comparative result;
Concrete, described preset value is pressure preset value and flow preset value;
Pressure inductor 24 is also electrically connected with controller 21, and the pressure signal of hydraulic press is sent to controller 21;
Described pressure signal and pressure preset value compare by controller 21, generate the control signal of hydraulic control pump according to comparative result.
Concrete, on the basis of above-described embodiment, in the present embodiment, the second receiving element in controller 21 is electrically connected with the D/A module in controller 21, receives the preset value that host computer 25 sends;
D/A module is electrically connected with the second transmitting element in controller 21, and the preset value that the second receiving element receives by D/A module, by digital-to-analogue conversion, is converted to analog signal, is sent the first receiving element of driver 22 by the second transmitting element;
Second receiving element of controller 21 is also electrically connected with the A/D module of controller 21, receives the pressure signal that pressure inductor 24 sends;
A/D module is electrically connected with the second comparing unit, and the pressure signal that the second receiving element receives by A/D module, by analog-to-digital conversion, is converted to data signal, and is sent to the second comparing unit;
Second comparing unit is electrically connected with the second transmitting element, described pressure signal and described pressure preset value is compared, and generates the control signal of adjustment 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, when described pressure signal is greater than described pressure preset value, controls the first pump (large pump) quit work according to the control signal of comparative result generation; When described pressure signal is less than described pressure preset value, control the first pump (large pump) and the second pump (little pump) all works according to the control signal that comparative result generates.
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, 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 is comprised; Wherein:
Host computer 31 is electrically connected with controller 32, and by arranging the preset value of technological parameter in host computer 31, described preset value is pressure preset value and flow preset value, and carries out communication by RS232 preset value is sent to controller 32;
Controller 32 is electrically connected with driver 33, and the preset value received is sent to driver 33;
Driver 33 is electrically connected with encoder 35 and pressure inductor 34, the pressure signal of the oil way of hydraulic press valve plate 38 that the tach signal of the hydraulic press motor 36 that received code device 35 obtains and pressure inductor 34 gather, and described tach signal and pressure signal and described preset value are compared, generate the control signal of adjustment hydraulic press motor 36 rotating speed according to comparative result, change speed and the position of motor 36 in real time according to the condition of production;
Pressure inductor 34 is also electrically connected with controller 32, and the pressure signal of hydraulic press is sent to controller 32;
Described pressure signal and pressure preset value compare by controller 32, generate the control signal of hydraulic control pump according to comparative result.
In whole Control system architecture, user sets technological parameter in the man-machine interface of host computer 31, controller 32 is transferred to by RS232, control signal is passed to driver 33 by DA conversion by controller 32, driver 33 controls speed and the position of motor 36, speed and the position of motor 36 is changed in real time according to the condition of production, if there is deviation in speed or position, at this moment by encoder 35 by gathered motor 36 data feedback to driver 33, by the speed required for driver 33 governor motor 36 and position, whole production of working good.Meanwhile, the actual pressure of pressure inductor 34 real-time monitoring system, and data are passed to driver 33, form a closed-loop system at this, the situation according to pump making motor 36 real-time regulates best speed and position.
In addition, the system actual pressure that pressure inductor 34 monitors also passes to controller 32, so that controller 32 does the control of duplex pump, in servo-drive system, pump 37 uses duplex pump (large pump+little pump), motor 36 drives two pumps simultaneously, when system pressure is lower (<70bar), large pump and little pump are jointly to system oil cylinder 39 fuel feeding, when system pressure is elevated to set pressure (70bar), large pump through valve off-load oil return box, and is only continued to system oil cylinder 39 fuel feeding by little pump, and hydraulic system pressure is remained in set up value.
As shown in Figure 4, a kind of hydraulic press energy-saving control method flow chart disclosed in the embodiment of the present invention, comprising:
S101, acquisition preset value;
Concrete, set preset value by host computer, preset value is pressure preset value and flow preset value.
S102, the tach signal of acquisition hydraulic press motor and the pressure signal of hydraulic press;
Be specially, obtained the tach signal of hydraulic press motor by encoder; The pressure signal of hydraulic press is gathered by pressure inductor.
S103, described tach signal and pressure signal and described preset value to be compared, generate the control signal of adjustment hydraulic press motor rotary speed according to comparative result;
Concrete, the controller be electrically connected with described host computer receives the described preset value set by host computer, and described preset value is sent to the driver be connected electrically;
Described driver is electrically connected with described encoder and described pressure inductor, receive the pressure signal of the tach signal of the hydraulic press motor that described encoder obtains and the hydraulic press of described pressure inductor collection, and described tach signal and pressure signal and described preset value are compared, the control signal of adjustment hydraulic press motor rotary speed is generated according to comparative result.
As shown in Figure 5, a kind of hydraulic press energy-saving control method flow chart disclosed in another embodiment of the present invention, comprising:
S201, acquisition preset value;
Concrete, set preset value by host computer, preset value is pressure preset value and flow preset value.
S202, the tach signal of acquisition hydraulic press motor and the pressure signal of hydraulic press;
The tach signal of hydraulic press motor is obtained by encoder;
The pressure signal of hydraulic press is gathered by pressure inductor.
S203, described tach signal and pressure signal and described preset value to be compared, generate the control signal of adjustment hydraulic press motor rotary speed according to comparative result;
Concrete, the controller be electrically connected with described host computer receives the described preset value set by host computer, and described preset value is sent to the driver be connected electrically;
Described driver is electrically connected with described encoder and described pressure inductor, receive the pressure signal of the tach signal of the hydraulic press motor that described encoder obtains and the hydraulic press of described pressure inductor collection, and described tach signal and pressure signal and described preset value are compared, the control signal of adjustment hydraulic press motor rotary speed is generated according to comparative result;
The pressure signal of S204, acquisition hydraulic press, compares described pressure signal and pressure preset value, generates the control signal of hydraulic control pump according to comparative result;
Concrete, the pressure signal of described hydraulic press is sent to controller by pressure inductor, and described pressure signal and pressure preset value compare by controller, generates the control signal of hydraulic control pump according to comparative result.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (12)
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 pressure signal of the tach signal of the hydraulic press motor that described encoder obtains and the hydraulic press of described pressure inductor collection, and described tach signal and pressure signal and described preset value are compared, the control signal of adjustment hydraulic press motor rotary speed is generated according to comparative result;
Described pressure inductor is also electrically connected with described controller, and the pressure signal of described hydraulic press is sent to described controller;
Described pressure signal and pressure preset value compare by described controller, generate the control signal of hydraulic control pump according to comparative result;
Wherein, described hydraulic pressure pump comprises the first pump and the second pump, when described pressure signal is greater than described pressure preset value, controls the first pump quit work according to the control signal of comparative result generation; When described pressure signal is less than described pressure preset value, control the first pump and the second pump all works according to the control signal that comparative result generates.
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, also comprises the host computer be electrically connected with described controller;
Set described preset value by described host computer, and described preset value is sent to described controller.
4. system according to claim 3, is characterized in that, carries out communication between described host computer and described controller by RS232.
5. system according to claim 4, is characterized in that, described driver comprises: the first receiving element, the first transmitting element and the first comparing unit; Wherein:
Described first receiving element is electrically connected with described first comparing unit, receive preset value, the tach signal of hydraulic press motor of described encoder acquisition and the pressure signal of the hydraulic press of described pressure inductor collection that described controller sends, and described preset value, tach signal and pressure signal are sent to described first comparing unit;
Described first comparing unit is electrically connected with described first transmitting element, described tach signal and pressure signal and described preset value is compared, and generates the control signal of adjustment hydraulic press motor rotary speed according to comparative result;
Described first transmitting element sends described control signal.
6. system according to claim 5, is characterized in that, described controller comprises: D/A module, A/D module, the second receiving element, the second transmitting element and the second comparing unit; Wherein:
Described second receiving element is electrically connected with described D/A module, receives the preset value that described host computer sends;
Described D/A module is electrically connected with described second transmitting element, and the described preset value that described second receiving element receives is converted to analog signal by described D/A module, is sent to the first receiving element of described driver by described second transmitting element;
Described second receiving element is also electrically connected with described A/D module, receives the pressure signal that described pressure inductor sends;
Described A/D module is electrically connected with described second comparing unit, and the described pressure signal that described second receiving element receives is converted to data signal by described A/D module, and is sent to described second comparing unit;
Described second comparing unit is electrically connected with described second transmitting element, described pressure signal and described pressure preset value is compared, and generates the control signal of adjustment hydraulic pressure pump according to comparative result;
Described control signal is sent to the first receiving element of described driver by described second transmitting element.
7. a hydraulic press energy-saving control method, is applied in the hydraulic press energy-saving control system as described in any one of claim 1 to 6, it is characterized in that, 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, generates the control signal of adjustment 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 hydraulic control pump according to comparative result;
Wherein, described hydraulic pressure pump comprises the first pump and the second pump, when described pressure signal is greater than described pressure preset value, controls the first pump quit work according to the control signal of comparative result generation; When described pressure signal is less than described pressure preset value, control the first pump and the second pump all works according to the control signal that comparative result generates.
8. method according to claim 7, is characterized in that, described acquisition preset value is specially:
Described preset value is set by host computer.
9. method according to claim 8, is characterized in that, the described tach signal of acquisition hydraulic press motor and the pressure signal of hydraulic press are specially:
The tach signal of hydraulic press motor is obtained by encoder;
The pressure signal of hydraulic press is gathered by pressure inductor.
10. method according to claim 9, is characterized in that, describedly described tach signal and pressure signal and described preset value is compared, and the control signal generating adjustment hydraulic press motor rotary speed according to comparative result is specially:
The controller be electrically connected with described host computer receives the described preset value set by host computer, and described preset value is sent to the driver be connected electrically;
Described driver is electrically connected with described encoder and described pressure inductor, receive the pressure signal of the tach signal of the hydraulic press motor that described encoder obtains and the hydraulic press of described pressure inductor collection, and described tach signal and pressure signal and described preset value are compared, the control signal of adjustment hydraulic press motor rotary speed is generated according to comparative result.
11. methods according to claim 10, is characterized in that, described preset value is pressure preset value and flow preset value.
12. methods according to claim 11, is characterized in that, the pressure signal of described acquisition hydraulic press, described pressure signal and pressure preset value are compared, and the control signal generating hydraulic control pump according to comparative result is specially:
The pressure signal of described hydraulic press is sent to described controller by described pressure inductor;
Described pressure signal and pressure preset value compare by described controller, generate the control signal of hydraulic control pump according to comparative result.
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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 |
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| CN103042715A (en) | 2013-04-17 |
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