CN102275280A - Injection machine servo energy-saving control system - Google Patents
Injection machine servo energy-saving control system Download PDFInfo
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- CN102275280A CN102275280A CN2011101024071A CN201110102407A CN102275280A CN 102275280 A CN102275280 A CN 102275280A CN 2011101024071 A CN2011101024071 A CN 2011101024071A CN 201110102407 A CN201110102407 A CN 201110102407A CN 102275280 A CN102275280 A CN 102275280A
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- injection machine
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Abstract
The invention discloses an injection machine servo energy-saving control system. The injection machine servo energy-saving control system comprises an oil tank, an oil pump and an injection machine, wherein the oil tank, the oil pump and the injection machine are connected orderly. The injection machine servo energy-saving control system also comprises a servo motor having a drive connection with the oil pump, an electronic flowmeter and a pressure sensor, wherein the electronic flowmeter and the pressure sensor are connected to a hydraulic pipe. The electronic flowmeter and the pressure sensor are connected to a controller. The controller is communicated with the servo motor through a frequency converter. The electronic flowmeter and the pressure sensor input detected flows and pressure into the controller and output control signals to control the servo motor through the frequency converter to adjust a revolving speed of the servo motor and thus an oil supply amount of the oil pump is adjusted. The injection machine servo energy-saving control system can enable the injection machine to control oil pump work according to pressure needs of all processes of an injection machine process flow to adjust automatically an oil output of the oil pump, and thus useless work produced by the oil pump is avoided and energy is saved.
Description
Technical field
The present invention relates to field of energy-saving technology, more particularly, relate to a kind of saving control system that is used for injection machine.
Background technology
As shown in Figure 1, traditional hydraulic injection molding machine system adopts asynchronous motor gasoline pump system, motor 10 drives oil pump 11 from fuel tank 12 oil suctions and pressurization output, control pressure, flow and the direction of oil in the fluid pressure line by flow proportion valve 13, overflow valve 14, pressure proportioning valve 15, move by desired direction with certain power (or moment of torsion) and certain speed with assurance operating mechanism, thus each process of realization injection moulding.When needs changed load flow and pressure, fuel pump speed was non-adjustable, use valve regulated usually for tradition constant displacement pump injection machine, and unnecessary oil enters fuel tank through overflow valve, greatly energy with the form loss of pressure differential on valve.Fig. 2 is according to the technical process of injection machine, the graph of a relation of draw system oil pressure P and time t: as seen from Figure 2, the matched moulds and the demoulding, the required oil pressure of die sinking system is lower, and the time is shorter; And inject, pressurize, the required oil pressure of cooling system is higher, and the time is longer, is generally the 40%-60% of a work period, and the length of time is relevant with processing work; Intermittent phase is shorter, and this is also relevant with the situation of processing work, can not want the intermittent phase sometimes.More than diagram is a kind of simple approximate representation, and in fact, if the screw rod of injection drives with oil motor, the system oil pressure during injection can be higher.The weight of injection machine processing work restrains tens thousand of grams and does not wait from tens of.Therefore, during injection machine just has, small-sized and large-scale branch, it also is inequality processing the small workpiece of tens of grams and the time of the big workpiece one-period of the thousands of grams of processing; Be exactly to same injection machine, the raw material difference of processing work, pressure and time required in each segment process flow process also change.
From the graph as seen, in the one-period workflow, the variation of load causes system pressure to change greatly, but still in the 50Hz operation, its fuel delivery is invariable to oil pump 11, and unnecessary hydraulic oil flows back to fuel tank 12 through overflow valve, flog a dead horse, wasted electric energy in vain.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective of the prior art, a kind of work that can in good time control oil pump according to the needed pressure of each operation of the technical process of injection machine is provided, automatically regulate the oil pump capacity of oil pump, avoid oil pump flog a dead horse can, help the injection machine servo energy-saving control system of energy savings.
For achieving the above object, technical scheme provided by the invention is as follows: a kind of injection machine servo energy-saving control system is provided, comprise the fuel tank, oil pump, the injection machine that are connected in turn on the fluid pressure line, also wrap the servomotor that is in transmission connection with oil pump, be connected electronic flowmeter, pressure sensor on the fluid pressure line, this electronic flowmeter, pressure sensor are connected with a controller, and controller is connected with the servomotor communication by frequency converter.
The beneficial effect of injection machine servo energy-saving control system of the present invention is: by adopting the work of driven by servomotor oil pump, on fluid pressure line, be connected with electronic flowmeter, pressure sensor, this electronic flowmeter, pressure sensor is connected with a controller, controller is connected with the servomotor communication by frequency converter, electronic flowmeter, pressure sensor is input to detected flow and pressure in the controller, and the output control signal is controlled servomotor by frequency converter, regulate the rotating speed of servomotor, thereby regulate the fuel delivery of oil pump, make the injection moulding function control the work of oil pump according to the needed pressure of each operation of the technical process of injection machine in good time, automatically regulate the oil pump capacity of oil pump, avoid oil pump flog a dead horse can, help energy savings.
Below in conjunction with drawings and Examples injection machine servo energy-saving control system of the present invention is described further.
Description of drawings
Fig. 1 is the structure principle chart of traditional injection moulding machine hydraulic system;
Fig. 2 is the graph of a relation of system oil pressure P and time t in the technical process of injection machine;
Fig. 3 is the systematic schematic diagram of injection machine servo energy-saving control system of the present invention;
Fig. 4 is the control principle figure of injection machine servo energy-saving control system of the present invention;
Fig. 5 is the first power change curve when the traditional IS220EN of Toshiba injection machine is carried out producing before the reducing energy consumption;
Fig. 6 is the second power change curve when the traditional IS220EN of Toshiba injection machine is carried out producing before the reducing energy consumption;
Fig. 7 is the 3rd a power change curve when the traditional IS220EN of Toshiba injection machine is carried out producing before the reducing energy consumption;
Fig. 8 is the 4th a power change curve when the traditional IS220EN of Toshiba injection machine is carried out producing before the reducing energy consumption;
Fig. 9 is the 5th a power change curve when the traditional IS220EN of Toshiba injection machine is carried out producing before the reducing energy consumption;
Figure 10 is the first power change curve when the traditional IS220EN of Toshiba injection machine is carried out producing after the reducing energy consumption;
Figure 11 is the second power change curve when the traditional IS220EN of Toshiba injection machine is carried out producing after the reducing energy consumption;
Figure 12 is the 3rd a power change curve when the traditional IS220EN of Toshiba injection machine is carried out producing after the reducing energy consumption;
Figure 13 is the 4th a power change curve when the traditional IS220EN of Toshiba injection machine is carried out producing after the reducing energy consumption;
Figure 14 is the 5th a power change curve when the traditional IS220EN of Toshiba injection machine is carried out producing after the reducing energy consumption.
The specific embodiment
Below be the preferred example of injection machine servo energy-saving control system of the present invention, therefore do not limit protection scope of the present invention.
With reference to Fig. 3, Fig. 4, a kind of injection machine servo energy-saving control system is provided, comprise the fuel tank 1 that is connected in turn on the fluid pressure line, oil pump 2, injection machine 3, also wrap the servomotor 4 that is in transmission connection with oil pump 2, be connected the electronic flowmeter 5 on the fluid pressure line, pressure sensor 6, this electronic flowmeter 5, pressure sensor 6 is connected with a controller 7, controller 7 is connected with servomotor 4 communications by frequency converter 8, described controller 7 is DDC controller or PLC controller, electronic flowmeter 5, pressure sensor 6 is input to detected flow and pressure in the controller 7, and the output control signal is controlled by 8 pairs of servomotors of frequency converter, regulate the rotating speed of servomotor, thereby regulate the fuel delivery of oil pump 2, make the injection moulding function control the work of oil pump 2 according to the needed pressure of each operation of the technical process of injection machine in good time, automatically regulate the oil pump capacity of oil pump 2, avoid oil pump 2 flog a dead horse can, help energy savings.
Below be that example explanation injection machine is transformed forward and backward energy-saving effect with the IS220EN of Toshiba injection machine, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, be injection machine power change curve when system produced before the IS220EN of Toshiba injection machine was transformed, the per second once sampling, extract 5 groups of data (every group data sampling 200 seconds) altogether, it is as follows that the IS220EN injection machine is transformed front motor consumed power data:
Figure 10, Figure 11, Figure 12, Figure 13, Figure 14 are injection machine power change curves when adopting the energy-saving control system of the present invention IS220EN of improved Toshiba injection machine to produce, the per second once sampling, extract 5 groups of data (every group data sampling 200 seconds) altogether, it is as follows that the IS220EN injection machine is transformed rear motor consumed power data:
The energy-saving effect comparative analysis was as follows after Toshiba's IS220EN injection machine adopted energy-saving control system transformation of the present invention:
Amount of electricity saving:
G1＝(Q1-Q2)*H
Fractional energy savings:
L1＝G1/Q1*100％
Wherein: G1: be the relative original system amount of electricity saving of servo-drive system;
L1: be the former relatively variable pump systems fractional energy savings of servo-drive system;
Q1: be the injection machine mean consumption power of original system;
Q2: be the injection machine mean consumption power of servo-drive system;
H: be the production time.
1), energy-saving control system of the present invention is with respect to the original system amount of electricity saving:
Amount of electricity saving per hour:
G1＝(Q1-Q2)*H＝(11.71-6.88)*1＝4.83kWh
Year amount of electricity saving and save the amount of money:
Suppose 7,000 hours (then be 350 days 20 hours every days) of the annual work of this injection machine, electricity price is 0.8 yuan/kWh,
G1＝(Q1-Q2)*H＝(11.71-6.88)*7000＝4.83*7000kWh
＝33810kWh
Year is saved the amount of money: 33810kWh*0.8 unit/kWh=27048 unit
2), energy-saving control system of the present invention is with respect to the original system fractional energy savings:
L1＝(Q1-Q2)/Q1*100％＝(11.71-6.88)/11.71-*100％＝41％
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (2)
1. injection machine servo energy-saving control system, comprise the fuel tank (1), oil pump (2), the injection machine (3) that are connected in turn on the fluid pressure line, it is characterized in that, also wrap the servomotor (4) that is in transmission connection with oil pump (2), be connected electronic flowmeter (5), pressure sensor (6) on the fluid pressure line, this electronic flowmeter (5), pressure sensor (6) are connected with a controller (7), and controller (7) is connected with servomotor (4) communication by frequency converter (8).
2. injection machine servo energy-saving control system according to claim 1 is characterized in that, described controller (7) is DDC controller or PLC controller.
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| CN2011101024071A CN102275280A (en) | 2011-05-20 | 2011-05-20 | Injection machine servo energy-saving control system |
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| CN2011101024071A CN102275280A (en) | 2011-05-20 | 2011-05-20 | Injection machine servo energy-saving control system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514177A (en) * | 2011-12-22 | 2012-06-27 | 铜陵市唯希塑料挤出设备科技有限公司 | Energy-saving control system of auxiliary engine shaping bench |
| CN102700099A (en) * | 2012-06-20 | 2012-10-03 | 无锡天惠塑机有限公司 | Hydraulic system used for injection molding machine |
| CN103496132A (en) * | 2013-09-27 | 2014-01-08 | 苏州长发塑胶有限公司 | Temperature control device for electric motor of injection molding machine |
| CN103790873A (en) * | 2012-10-31 | 2014-05-14 | 博世力士乐（常州）有限公司 | Hydraulic drive device and system |
| CN104985158A (en) * | 2015-07-10 | 2015-10-21 | 重庆市博平液压机械有限公司 | Servo hydraulic transformation method for die-casting machine |
| CN105313285A (en) * | 2014-07-17 | 2016-02-10 | 淮安市吉达塑料机械有限公司 | Novel injection machine control system |
| CN108050132A (en) * | 2017-12-07 | 2018-05-18 | 海天塑机集团有限公司 | The oil temperature keeping method and system of a kind of electric-hydraulic combined injection molding machine |
| CN109099301A (en) * | 2018-09-11 | 2018-12-28 | 珠海格力电器股份有限公司 | Oil pump systems and its control method |
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| CN2562958Y (en) * | 2002-09-02 | 2003-07-30 | 宁波海天股份有限公司 | Pre-molding, injection hydraulic loop of injection molding machine |
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| CN201702911U (en) * | 2010-03-04 | 2011-01-12 | 上海奥迈电气有限公司 | Injection molding machine double-closed-loop energy-saving control device |
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| CN202045843U (en) * | 2011-05-20 | 2011-11-23 | 王洪彬 | Energy-saving servo control system for injection molding machine |
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Patent Citations (5)
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| CN1436108A (en) * | 2000-04-20 | 2003-08-13 | 普罗控制公开股份有限公司 | Method and drive system for control/regulation of linear pressure/cast movement |
| CN2562958Y (en) * | 2002-09-02 | 2003-07-30 | 宁波海天股份有限公司 | Pre-molding, injection hydraulic loop of injection molding machine |
| CN201702911U (en) * | 2010-03-04 | 2011-01-12 | 上海奥迈电气有限公司 | Injection molding machine double-closed-loop energy-saving control device |
| CN201816198U (en) * | 2010-06-29 | 2011-05-04 | 泰瑞机器制造(中国)有限公司 | Servo energy-saving device of injection molding machine |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514177A (en) * | 2011-12-22 | 2012-06-27 | 铜陵市唯希塑料挤出设备科技有限公司 | Energy-saving control system of auxiliary engine shaping bench |
| CN102700099A (en) * | 2012-06-20 | 2012-10-03 | 无锡天惠塑机有限公司 | Hydraulic system used for injection molding machine |
| CN102700099B (en) * | 2012-06-20 | 2015-02-04 | 无锡天惠塑机有限公司 | Hydraulic system used for injection molding machine |
| CN103790873A (en) * | 2012-10-31 | 2014-05-14 | 博世力士乐（常州）有限公司 | Hydraulic drive device and system |
| CN103496132A (en) * | 2013-09-27 | 2014-01-08 | 苏州长发塑胶有限公司 | Temperature control device for electric motor of injection molding machine |
| CN105313285A (en) * | 2014-07-17 | 2016-02-10 | 淮安市吉达塑料机械有限公司 | Novel injection machine control system |
| CN104985158A (en) * | 2015-07-10 | 2015-10-21 | 重庆市博平液压机械有限公司 | Servo hydraulic transformation method for die-casting machine |
| CN108050132A (en) * | 2017-12-07 | 2018-05-18 | 海天塑机集团有限公司 | The oil temperature keeping method and system of a kind of electric-hydraulic combined injection molding machine |
| CN109099301A (en) * | 2018-09-11 | 2018-12-28 | 珠海格力电器股份有限公司 | Oil pump systems and its control method |
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Application publication date: 20111214 |