CN1137812C - Injection machine energy-saving equipment based on frequency conversion speed controller and its method - Google Patents
Injection machine energy-saving equipment based on frequency conversion speed controller and its method Download PDFInfo
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Abstract
The present invention discloses an energy saving device of an injection moulding machine based on a frequency governor and a method thereof. The device comprises a signal collecting device and a signal processing device, wherein the signal collecting device is used for receiving the set technological parameters and the working condition signals of the injection moulding machine converting and inputting the signals to the signal processing device; the signal processing device calculates the operation set frequency value of the frequency governor and inputs the frequency value to the frequency governor connected with a motor of the injection moulding machine so as to control the running speed of the motor. Under the condition of no extreme requirements, the running speed of the motor can be properly reduced, thereby ensuring the normal production of the injection moulding machine and effectively saving electric energy.
Description
Technical field
The present invention relates to a kind of energy conservation apparatus of plastic jetting-moulding machine and method based on variable-frequency governor.
Background technology
In production now and the life, a large amount of plastic products or semi-finished product are made by injection molding machine injection moulding punching press.Fig. 1 is injection molding machine machine shape figure, its work is as follows: existing technological parameter with each process section of production, as: pressure (oil pressure), speed (going out speed oil), time, distance etc. are by panel (A position) input, injection molding machine outputs to pressure flow ratio adjusting valve (C position) after automatically these parameter input central processor CPU plates (B position) being handled.Power frequency motor (D position) provides enough power to drive oil pump (E position), and the oil pressure of oil pump and go out speed oil and want depended on pressure flow proportional adjuster valve to adjust, and different process sections can require different oil pressure and go out speed oil and guarantee.Its crucial process section comprises: processes such as locked mode, injection, colloidal sol, cooling, die sinking.The power frequency motor inserts electrical network by three-phase power line, provides equipment as the power of injection molding machine.
Existing a large amount of injection molding machine all adopts the power frequency supply input motor to drive the mode of oil pump work.When using injection molding machine to produce each part product, all to pass through the multiple tracks technical process, and the oil pressure of the required oil pump of per pass technical process with go out speed oil and have nothing in common with each other.When adopting the power frequency supply input motor to drive the mode of oil pump work, consider required maximum oil pressure, exceed extremely requiring under the situation of speed oil most, motor the power that should provide meet the demands.So, do not need in the extreme technical process that requires many, the part power that the power frequency motor is provided is by used up in vain.
At publication number is that Chinese patent application that CN1249989, name are called " integrated control platform and the method thereof that are used for adapted to injection system " has proposed a kind of apparatus and method that the adapted to injection system of device with the corresponding various feedback signal of multiple generation is controlled of being used for, and it comprises and is used to provide a kind of structure and step with operator's console of a display and at least one operator's input unit.An independent all-purpose computer be coupled to simultaneously operator control panel and multiple articles injection-moulded on, be used for injection moulding function and operator control function are carried out control tasks.This computerized optimization ground is controlled the articles injection-moulded real-time closed-loop that carries out in treatment system feedback signal and operator's input signal.Technical scheme in this patent application can be carried out the frequency conversion transformation to injection molding machine, to cut down the consumption of energy.But when adopting this technological transformation injection molding machine, the user need change internal structure, software, the circuit of injection molding machine, that is to say that its realization need be to the abundant understanding of injection molding machine internal structure and operation mechanism, therefore need the technical support of injection molding machine manufacturer just can realize, limited its range of application greatly.
Summary of the invention
The purpose of this invention is to provide a kind of energy conservation apparatus of plastic jetting-moulding machine, can make the motor of injection molding machine provide different power at different process sections, with energy savings, and do not need internal structure, software, circuit to carry out any change can to realize improvement to existing injection molding machine to injection molding machine.
For achieving the above object, the present invention proposes a kind of energy conservation apparatus of plastic jetting-moulding machine based on variable-frequency governor, comprise signal pickup assembly, signal processing apparatus, described signal pickup assembly is used to receive the technological parameter setting and the working state signal of injection molding machine, and will be input to signal processing apparatus after these conversion of signals; Frequency calculation means device is arranged in signal processing apparatus, the frequency value F that this frequency calculation means device is used to receive the signal from signal pickup assembly and calculates variable-frequency governor, and this frequency value F is input to the variable-frequency governor that links to each other with the motor of injection molding machine, with the running speed of control motor; It is characterized in that: described technological parameter setting and working state signal comprise the pressure proportional conditioning signal (P) and the flow proportional conditioning signal (Q) of the pressure flow ratio adjusting valve on the injection molding machine; The input of described signal pickup assembly (1) links to each other with the pressure flow ratio adjusting valve of injection molding machine, is used to gather the pressure proportional conditioning signal (P) and the flow proportional conditioning signal (Q) of described pressure flow ratio adjusting valve; Described signal pickup assembly (1) comprises signal isolation circuit (11), plastic filter circuit (12), the amplitude limit adjustment circuit (13) that links to each other successively.
The present invention realizes that the scheme of above-mentioned purpose also comprises a kind of injection machine energy-saving method based on variable-frequency governor, may further comprise the steps:
Gather the technological parameter setting and the working state signal of injection molding machine;
Go out the frequency value F of variable-frequency governor according to the calculated signals of input;
Frequency value F is input to the variable-frequency governor that links to each other with the injection molding machine motor;
It is characterized in that:
The technological parameter setting of the injection molding machine of being gathered and working state signal are the pressure proportional conditioning signal value (Px) and the flow proportional conditioning signal values (Qx) of the pressure flow ratio adjusting valve on the injection molding machine;
According to the input calculated signals go out variable-frequency governor frequency values (F) method as shown in the formula:
Fp＝Px*Fb/(Pmax-Pmin)
Fq＝Qx*Fb/(Qmax-Qmin)
F＝a*Fp+b*Fq
Wherein Fb is the basic running frequency of the motor of injection molding machine; A, b are the parameter of setting in advance, and its span satisfies: a＜=1, b＜=1, a+b=1; Pmax, Pmin, Qmax, Qmin are respectively the maximum and the minimum value of pressure proportional conditioning signal value (Px) and flow proportional conditioning signal value (Qx) in the whole process flow.
Owing to adopted above scheme, adopt variable-frequency governor to be connected between power frequency supply and the injection molding machine motor, and sampling per pass operation is to the oil pressure and the instruction or other relevant information that go out processing parameter settings such as speed oil of oil pump, draw the motor running speed that this moment satisfies technological requirement by computing, in the non-running speed that extremely requires just can suitably reduce under the situation motor, so both guarantee the ordinary production of injection molding machine, saved electric energy again effectively.Because the input of signal pickup assembly (1) links to each other with the pressure flow ratio adjusting valve of injection molding machine; a kind of practical and reliable signaling interface and processing unit are provided; wherein " plastic filter circuit, amplitude limit adjust circuit " is to guarantee that " value of the value of pressure proportional conditioning signal and flow proportional conditioning signal " quick and precisely obtained by system and device and reject disturbing signal in advance, avoids system and device to enter abnormality (such as tripping grinder).This method is not adopt the existing injection molding machine of the energy-saving and frequency-variable technology of mentioning in the literary composition as the technological transformation object in a large number, when adopting the art of this patent to transform injection molding machine, the user does not need internal structure, software, the circuit to injection molding machine to carry out any change, the realization that is to say the art of this patent need not the understanding to injection molding machine internal structure and operation mechanism, does not also need the technical support of injection molding machine manufacturer just can realize.
Description of drawings
Fig. 1 is the outer hoist pennants of a kind of typical injection molding machine.
Fig. 2 is the schematic diagram of the embodiment of the invention one.
Fig. 3 is the block diagram of signal pickup assembly of the present invention.
Fig. 4 is a signal processing flow schematic diagram in the signal processing apparatus.
Fig. 5 is the schematic diagram of the embodiment of the invention two.
Fig. 6 is one of signal pickup assembly circuit diagram.
Fig. 7 is two of a signal pickup assembly circuit diagram.
Embodiment
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
Fig. 2,5 is respectively two kinds of ways of realization of the present invention, it shown in the figure a kind of energy conservation apparatus of plastic jetting-moulding machine based on variable-frequency governor, it is characterized in that: it comprises signal pickup assembly 1, signal processing apparatus 2, described signal pickup assembly 1 is used to receive the technological parameter setting and the working state signal of injection molding machine, and will be input to signal processing apparatus 2 after these conversion of signals; In signal processing apparatus 2, frequency calculation means device is arranged, this frequency calculation means device is used to receive from the signal of signal pickup assembly 1 and calculates the frequency value F of variable-frequency governor, and this frequency value F is input to the variable-frequency governor that links to each other with the motor of injection molding machine, with the running speed of control motor.
The most basic connection that reaches energy-saving effect is: the input of described signal pickup assembly 1 links to each other with the pressure flow ratio adjusting valve of injection molding machine, is used for the pressure proportional conditioning signal P and the flow proportional conditioning signal Q of input pressure flow proportional adjuster valve; Described signal pickup assembly 1 comprises signal isolation circuit 11, plastic filter circuit 12, the amplitude limit adjustment circuit 13 that links to each other successively, through the conversion of these circuit, the value Qx (value that is called for short the flow proportional signal) of value Px of difference output pressure ratio conditioning signal (being called for short pressure proportional conditioning signal value Px) and flow proportional signal.Again pressure proportional conditioning signal value Px, flow proportional conditioning signal value Qx are input to signal processing apparatus 2.
In order to reach better energy-saving effect, the input of described signal pickup assembly 1 can also link to each other with one of following signal of injection molding machine: the output signal of limit switch signal, touch-screen output signal, central processor CPU plate, and to determine present residing operation stage.
Utilize said apparatus to realize that the injection machine energy-saving method may further comprise the steps: technological parameter setting and the working state signal of 1) gathering injection molding machine; 2) calculated signals according to input goes out the frequency value F of variable-frequency governor; 3) frequency value F is input to the variable-frequency governor that links to each other with the injection molding machine motor.
If the technological parameter setting of the injection molding machine of being gathered and working state signal are the pressure proportional conditioning signal P and the flow proportional conditioning signal Q of the pressure flow ratio adjusting valve on the injection molding machine;
Then according to the input calculated signals go out variable-frequency governor frequency value F method as shown in the formula:
Fp＝Px*Fb/(Pmax-Pmin)
Fq＝Qx*Fb/(Qmax-Qmin)
F＝a*Fp+b*Fq
Wherein Fb is the basic running frequency of the motor of injection molding machine; A＜=1, b＜=1, a+b=1, the value of a, b is artificial in advance the setting.According to hydraulic system characteristic and test empirical parameter, recommending the span of a is 0～0.2; Recommending the span of b is 1～0.8, for pursue maximum energy-saving effect then a level off to 0, b levels off to 1.Generally speaking, consider that the dynamic property of variable-frequency governor and the pressure of injection molding machine use and the property difference and the on-the-spot technological parameter of flow proportional adjuster valve need omit inching to the span of a, b.Pmax, Pmin, Qmax, Qmin are respectively maximum and the minimum value of pressure proportional conditioning signal value Px and flow proportional conditioning signal value Qx in the whole process flow.Px and Qx are through signal pickup assembly 1 output pressure ratio conditioning signal value and flow proportional conditioning signal value.
If the pressure proportional conditioning signal P and flow proportional conditioning signal Q of the technological parameter setting of the injection molding machine of being gathered and the working state signal pressure flow ratio adjusting valve on comprising injection molding machine, also have in the following signal at least a: the output signal of limit switch signal, touch-screen output signal, central processor CPU plate, then the method for frequency value F that goes out variable-frequency governor according to the calculated signals of input is according to different process sections and difference, as shown in the formula:
Fp＝Px*Fb/(Pmax-Pmin)
Fq＝Qx*Fb/(Qmax-Qmin)
For the first process section F=a1*Fp+b1*Fq, a1＜=1 wherein, b1＜=1, a1+b1=1,
For the second process section F=a2*Fp+b2*Fq, a2＜=1 wherein, b2＜=1, a2+b2=1,
For the 3rd process section F=a3*Fp+b3*Fq, a3＜=1 wherein, b3＜=1, a3+b3=1,
For x process section F=ax*Fp+bx*Fq, ax＜=1 wherein, bx＜=1, ax+bx=1,
Wherein Fb is the basic running frequency of the motor of injection molding machine; A1, b1, a2, b2, a3, b3, ax, the value of bx can artificially be provided with according to actual conditions.According to hydraulic system characteristic and test empirical parameter, recommending the span of ax (x=integer) is 0～0.2; Recommending the span of bx (x=integer) is 1～0.8, for pursue maximum energy-saving effect then ax level off to 0, bx levels off to 1.The corresponding process section of the value of each x, the ax and the bx of different process section should give differentiation, and its principle is: the span upper limit 0.2 that leading process section (as the injection section) ax of pressure is tending towards recommending; The span upper limit 1.0 that leading process section (as the colloidal sol section) bx of flow is tending towards recommending.Generally speaking, consider that the dynamic property of variable-frequency governor and the pressure of injection molding machine use and the property difference and the on-the-spot technological parameter of flow proportional adjuster valve need omit inching to the span of ax, bx.Pmax, Pmin, Qmax, Qmin are respectively maximum and the minimum value of pressure proportional conditioning signal value Px and flow proportional conditioning signal value Qx in the whole process flow.Px and Qx are through signal pickup assembly 1 output pressure ratio conditioning signal value and flow proportional conditioning signal value.
The energy-conservation key of the present invention is to adjust the output of variable-frequency governor to motor according to the requirement of exerting oneself of the motor of different process section, changing the running speed of motor, thereby reaches energy-conservation effect.Because the process section of injection molding machine when work is more, as: locked mode, injection, colloidal sol, die sinking etc., so the technological parameter that relates to is also more, how from many technological parameters, extract important and effective information is emphasis of the present invention, and how to handle these information and finally obtain the operating frequency of a variable-frequency governor, control motor speed thus, reaching effective purpose of energy saving is difficult point of the present invention.Realize energy-conservationly finally will leaning on the variable-frequency governor speed governing to change rotating speed of motor to finish.
The mode that variable-frequency governor is accepted frequency instruction is very abundant, and the input of panel numeral is arranged, analog quantity input, upper machine communication input, digit pulse input etc.This specification embodiment is the way incoming frequency instruction by analog input, certainly earlier this analog quantity is converted to digit pulse or inputs to variable-frequency governor through host computer, and effect is with equivalent fully by analog input.
Illustrate simply that for the injection molding machine part-structure dotted line then is a device part of the present invention outward in the frame of broken lines among Fig. 2,5.Touch panel obtains the technological parameter of the per pass operation of product processing, as oil pressure, go out speed oil, operation sequence number, operating time etc.; These signals are sent into the central processor CPU plate of injection molding machine; The central processor CPU plate is the finish the work processing core of the related signal of telecommunication of the whole injection molding machine of control, one of its function be exactly produce the pressure flow ratio adjusting valve required with the pairing analog electrical signal of technological requirement and other coherent signal; The above signal that the pressure flow ratio adjusting valve is sent here according to central processor CPU is exerted oneself size and speed control by regulating oil pressure and going out speed oil under technological requirement with oil pump; And motor is a power source of supplying with oil pump.Without the motor based on the injection machine energy-saving transformation of frequency control generally is the constant power frequency 50HZ that operates in.
As previously mentioned, when available technology adopting power frequency supply input motor drives the mode of oil pump work, do not need in the extreme technical process that requires many, the part power that the power frequency motor is provided is by used up in vain.If the power that can allow motor provide to meet the demands just according to technological requirement that is to say the running speed that extremely requires suitably to reduce under the situation motor non-, so just reached the purpose of saves energy.Variable-frequency governor is exactly the electric equipment of running speed that can the flexible motor, and to be 50HZ output to motor with the three-phase alternating current of lower frequency to the AC power commutation inversion that it can import power frequency (50HZ), reduces the running speed of motor.When motor when being lower than the speed operation of power frequency rotating speed, institute's power consumption can descend thereupon.
How from many technological parameters, extract important and effective information is emphasis of the present invention.Because realize energy-conservationly to greatest extent, promptly reduce the variable-frequency governor output frequency to greatest extent, also will guarantee just that oil pump that motor drives is exerted oneself the running speed of motor the time will satisfy the requirement of technology.In order to determine the output frequency of variable-frequency governor, just must extract the useful signal of technological parameter setting of reflection injection molding machine and operating state.
Signal pickup assembly 1 among Fig. 2,5 is for realizing the invention parts of above-mentioned signals collecting.Most injection molding machines all are furnished with the pressure flow ratio adjusting valve, in order to regulating the exert oneself size and the speed of oil pump, the signal of input pressure flow proportional adjuster valve is two crucial analog pressure signal ratio conditioning signal P of reflection processing parameter setting and several switching value signals of telecommunication of flow proportional conditioning signal Q and the present operating state of reflection injection molding machine.Signal pickup assembly 1 has obtained above-mentioned signal rapidly and accurately, and is easy-to-handle analog quantity and switching value level signal with the conversion of signals of gathering.
The benefit that adopts this pressure flow ratio adjusting valve signal to obtain scheme is: general pressure flow ratio adjusting valve leading-in box is in machine exterior, and signals collecting is convenient; The pressure flow ratio adjusting valve is that oil pump is handled the critical piece of regulating, and the key signal that enters the pressure flow ratio adjusting valve is concentrated, and can reflect each process section requirement; Pressure flow ratio adjusting valve signal mostly is 1 peace with interior current signal or about 20 volts level signal, is easy to unscented transformation and processing; Pressure flow ratio adjusting valve signal is followed changes in process parameters constantly, and is real-time to the signal processing of its collection.
But, not necessarily have only pressure flow ratio adjusting valve signal can reflect that the injection molding machine technological parameter is provided with and the useful signal of operating state, limit switch such as injection molding machine, the touch-screen output signal, and the output signal of central processor CPU plate can both reflect part or all technological parameter, injection molding machine work state information.So the signal that is equal to P, Q signal character is obtained at other position that is not precluded within injection molding machine, as the computer plate of injection molding machine, the PLC controller is first-class, and this P, Q signal be current signal not necessarily also, may be voltage or other digital signals.But the way at pressure flow ratio adjusting valve up-sampling signal is the easiest, and adaptability is strong, and the software and hardware structure of injection molding machine is not had special change requirement.
Signal how processing signals harvester 1 is exported and the operating frequency that finally obtains a variable-frequency governor reach the control motor speed, are difficult points of the present invention thereby reach effectively energy-conservation.It can be realized with software mode, also can adopt hardware mode to realize.What Fig. 2 showed is a kind of software processing mode.Signal processing apparatus among Fig. 2 and variable-frequency governor are the TD2000 AC frequency conversion speed regulator that Huawei's electric corporation design is produced, the 2 road sign quasi-modes that utilize itself to have intend passage (0～10V) and 8 multi-function input terminals come the analog quantity and the switching value level signals of 1 output of received signal harvester.Wherein in the core Control Software of this TD2000 type variable-frequency governor signal processing is just arranged.The scheme that this kind mode obtains suitable variable-frequency governor operating frequency is effectively the most succinct and cost is low, and Fig. 4 is for obtaining the core concept of suitable variable-frequency governor operating frequency after handling according to signal pickup assembly 1 output signal is synthetic.
As shown in Figure 4, the key algorithm thinking of structure variable-frequency governor output frequency function is as follows:
One, the algorithm (promptly having only pressure proportional conditioning signal P, flow proportional conditioning signal Q) that does not add " other signal " input:
1. sampled pressure ratio conditioning signal P, flow proportional conditioning signal Q are through 0～10V signal of two paths of signals harvester 1 output: Px, Qx; Note, in this manual, P, Q are meant the input (being " pressure, flow proportional conditioning signal " in the specification) of signal pickup assembly 1, and Px, Qx (being " pressure, flow proportional conditioning signal value " in the specification) are the output of signal pickup assembly 1, and purpose is in order to obtain the accessible industrial standard voltage of signal processing apparatus 2 or variable-frequency governor or current signal (0～10V or 0～20mA).
2. determine pressure proportional conditioning signal value Px in the technological process, actual maximum and the minimum value Pmax of flow proportional conditioning signal value Qx, Pmin, Qmax, Qmin;
3. calculate Px, the variable-frequency governor output frequency Fp that Qx is corresponding required, Fq:
Fp＝Px*Fb/(Pmax-Pmin)
Fq=Qx*Fb/ (Qmax-Qmin) (Fb generally equals the frequency of civil power, Fb=50 herein)
4. calculate the frequency F of final variable-frequency governor output:
F=a*Fp+b*Fq, a=0.95 wherein, b=0.05 (about the explanation of a, the b value literary composition that sees before).
Two, the algorithm that adds " other signal " input
1～3 step is the same, above the 4th step by following replacement:
Code level signal (the A of sampled signal harvester 1, B, C, D...), the frequency Fp that obtains according to each process section adjustment correction step 3, Fq obtains more optimal output frequency F ' (multistage function, corresponding different process section A (matched moulds section), B (colloidal sol section), C (injection section), D (pressurize section) ...) F '=a1*Fp+b1*Fq, a1＜=1 wherein, b1＜=1, a1+b1=1, signal A (matched moulds section) F '=a2*Fp+b2*Fq, a2＜=1 wherein, b2＜=1, a2+b2=1, signal B (colloidal sol section) F '=a3*Fp+b3*Fq, a3＜=1 wherein, b3＜=1, a3+b3=1, signal C (injection section) F '=a4*Fp+b4*Fq, a4＜=1 wherein, b4＜=1, a4+b4=1, signal D (pressurize section)
……
Wherein, a, b, a1, b1, a2, b2, a3, b3, a4, the value of b4... can artificially be provided with according to actual conditions, in this example: a1=0.95; B1=0.95;
a2＝0.00；b2＝1.00；
a3＝0.20；b3＝0.80；
a4＝0.15；b4＝0.85
……
Here will mention especially, the foregoing description is to specific variable-frequency governor product, obtains suitable variable-frequency governor operating frequency by revising the variable-frequency governor kernel software.But the present invention obviously is not only applicable to some specific variable-frequency governor, is applicable to common variable-frequency governor yet.For a common variable-frequency governor, if be unfamiliar with its internal core software, better mode is to realize above-mentioned purpose by hardware plan, as shown in Figure 5.
As mentioned above, signal processing apparatus 2 itself can be finished the generation of frequency by external hardware, passes to variable-frequency governor again; Also can finish the generation of frequency by revising the variable-frequency governor Control Software, obtain but have only variable-frequency governor producer just can do usually with signal pickup assembly 1 when the variable-frequency governor input.Signal processing apparatus 2 is the signal processing function plates with hardware construction among Fig. 5, and it is treated to the frequency setting signal that variable-frequency governor can receive with the signal of signal pickup assembly 1 output is synthetic.Variable-frequency governor can make motor rotation in corresponding work frequency and rotating speed according to this signal.And the core concept of synthetic processing procedure has shown at flow chart 4, just no longer repeats.
The present invention's man large size plastic jetting-moulding device manufacturing and use producer to do test fully in Shenzhen.The injection molding machine EA80 that the test type is produced voluntarily for this factory, its power of motor is 11KW.
Experimental result shows, no energy-saving appliance per hour test power consumption be 3.643 degree/hour; Have energy-saving appliance per hour test power consumption be 2.042 the degree/hour.Power savings behind the installation energy-saving appliance is: (3.643-2.042)/and 3.643=43.9%.
After the reducing energy consumption, quick-fried dish, glutinous mill problem do not occur, through long-time test run, product meets technological requirement, and the process time is not also had influence; And energy-saving appliance simple installation, reliable operation; See that from test data energy-saving effect is extremely remarkable.Consider broad applicability, the unit energy-saving effect is between 30%～40%.
Claims (8)
1, a kind of energy conservation apparatus of plastic jetting-moulding machine based on variable-frequency governor, it comprises signal pickup assembly (1), signal processing apparatus (2), described signal pickup assembly (1) is used to gather the technological parameter setting and the working state signal of injection molding machine, and will be input to signal processing apparatus (2) after these conversion of signals; In signal processing apparatus (2), frequency calculation means device is arranged, the operation setpoint frequency value (F) that this frequency calculation means device is used for receiving the signal from signal pickup assembly (1) and calculates variable-frequency governor, and this frequency values (F) is input to the variable-frequency governor that links to each other with the motor of injection molding machine, with the running speed of control motor; It is characterized in that: described technological parameter setting and working state signal comprise the pressure proportional conditioning signal (P) and the flow proportional conditioning signal (Q) of the pressure flow ratio adjusting valve on the injection molding machine; The input of described signal pickup assembly (1) links to each other with the pressure flow ratio adjusting valve of injection molding machine, is used to gather the pressure proportional conditioning signal (P) and the flow proportional conditioning signal (Q) of described pressure flow ratio adjusting valve; Described signal pickup assembly (1) comprises signal isolation circuit (11), plastic filter circuit (12), the amplitude limit adjustment circuit (13) that links to each other successively.
2, the energy conservation apparatus of plastic jetting-moulding machine based on variable-frequency governor as claimed in claim 1, it is characterized in that: described technological parameter setting and working state signal also comprise limit switch signal, the touch-screen output signal of injection molding machine, the output signal of central processing unit (CPU) plate, at least also one of them links to each other the input of described signal pickup assembly (1), to determine present residing operation stage.
3, the energy conservation apparatus of plastic jetting-moulding machine based on variable-frequency governor as claimed in claim 1 is characterized in that: described signal processing apparatus (2) constitutes an integral body with the variable-frequency governor Control Software, and its output with signal pickup assembly (1) is linked to each other; Described signal processing apparatus (2) comprises adder, subtracter, multiplier, divider, and the value (Px) of the pressure proportional conditioning signal (P) of the pressure flow ratio adjusting valve on the injection molding machine that they will be handled through signal pickup assembly (1) and the value (Qx) of flow proportional conditioning signal (Q) are done the frequency values (F) that following processing obtains variable-frequency governor:
Fp＝Px*Fb/(Pmax-Pmin)
Fq＝Qx*Fb/(Qmax-Qmin)
F＝a*Fp+b*Fq
Wherein Fb is the basic running frequency of the motor of injection molding machine; A, b are the parameter of setting in advance, and its span satisfies: a＜=1, b＜=1, a+b=1; Pmax, Pmin, Qmax, Qmin are respectively the maximum and the minimum value of pressure proportional conditioning signal value (Px) and flow proportional conditioning signal value (Qx) in the whole process flow.
4, the energy conservation apparatus of plastic jetting-moulding machine based on variable-frequency governor as claimed in claim 1, it is characterized in that: described signal processing apparatus (2) is to be independent of device variable-frequency governor, that be made up of hardware, it comprises adder, subtracter, multiplier, divider, and they will do the frequency values (F) that following processing obtains variable-frequency governor through the pressure proportional conditioning signal value (Px) and the flow proportional conditioning signal value (Qx) of the pressure flow ratio adjusting valve on the injection molding machine of signal pickup assembly (1) processing:
Fp＝Px*Fb/(Pmax-Pmin)
Fq＝Qx*Fb/(Qmax-Qmin)
F＝a*Fp+b*Fq
Wherein Fb is the basic running frequency of the motor of injection molding machine; A, b are the parameter of setting in advance, and its span satisfies: a＜=1, b＜=1, a+b=1; Pmax, Pmin, Qmax, Qmin are respectively the maximum and the minimum value of pressure proportional conditioning signal value (Px) and flow proportional conditioning signal value (Qx) in the whole process flow.
5, as claim 3 or 4 described energy conservation apparatus of plastic jetting-moulding machine based on variable-frequency governor, it is characterized in that: wherein the span of a is 0～0.2; The span of b is 1～0.8.
6, a kind of injection machine energy-saving method based on variable-frequency governor may further comprise the steps:
Gather the technological parameter setting and the working state signal of injection molding machine;
Go out the frequency values (F) of variable-frequency governor according to the calculated signals of input;
(F) is input to the variable-frequency governor that links to each other with the injection molding machine motor with frequency values; It is characterized in that:
The technological parameter setting of the injection molding machine of being gathered and working state signal are the pressure proportional conditioning signal value (Px) and the flow proportional conditioning signal values (Qx) of the pressure flow ratio adjusting valve on the injection molding machine;
According to the input calculated signals go out variable-frequency governor frequency values (F) method as shown in the formula:
Fp＝Px*Fb/(Pmax-Pmin)
Fq＝Qx*Fb/(Qmax-Qmin)
F＝a*Fp+b*Fq
Wherein Fb is the basic running frequency of the motor of injection molding machine; A, b are the parameter of setting in advance, and its span satisfies: a＜=1, b＜=1, a+b=1; Pmax, Pmin, Qmax, Qmin are respectively the maximum and the minimum value of pressure proportional conditioning signal value (Px) and flow proportional conditioning signal value (Qx) in the whole process flow.
7, the injection machine energy-saving method based on variable-frequency governor as claimed in claim 6, it is characterized in that: wherein the span of a is 0～0.2; The span of b is 1～0.8.
8, the injection machine energy-saving method based on variable-frequency governor as claimed in claim 6 is characterized in that:
The technological parameter setting of the injection molding machine of being gathered and working state signal value are pressure proportional conditioning signal value (Px) and the flow proportional conditioning signal values (Qx) through the pressure flow ratio adjusting valve on the injection molding machine of signal pickup assembly (1) processing, and at least a in the following signal: the output signal of limit switch signal, touch-screen output signal, central processing unit (CPU) plate;
The method of frequency values (F) that goes out variable-frequency governor according to the calculated signals of input is according to different process sections and difference, as shown in the formula:
Fp＝Px*Fb/(Pmax-Pmin)
Fq＝Qx*Fb/(Qmax-Qmin)
For the first process section F=a1*Fp+b1*Fq, a1＜=1 wherein, b1＜=1, a1+b1=1, for the second process section F=a2*Fp+b2*Fq, a2＜=1 wherein, b2＜=1, a2+b2=1,
For the 3rd process section F=a3*Fp+b3*Fq, a3＜=1 wherein, b3＜=1, a3+b3=1,
For x process section F=ax*Fp+bx*Fq, ax＜=1 wherein, bx＜=1, ax+bx=1,
Wherein Fb is the basic running frequency of the motor of injection molding machine; A1, b1, a2, b2, a3, b3, ax, bx are the parameter of setting in advance, and according to hydraulic system characteristic and test empirical parameter, the span of ax (x=integer) is 0～0.2; The span of bx (x=integer) is 1～0.8, corresponding process section of the value of each x in the formula; Pmax, Pmin, Qmax, Qmin are respectively the maximum and the minimum value of pressure proportional conditioning signal value (Px) and flow proportional conditioning signal value (Qx) in the whole process flow; According at least a in the following signal: the output signal of limit switch signal, touch-screen output signal, central processing unit (CPU) plate is judged present residing operation stage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011356804A CN1137812C (en) | 2000-10-18 | 2001-10-16 | Injection machine energy-saving equipment based on frequency conversion speed controller and its method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00130754.1 | 2000-10-18 | ||
| CN00130754A CN1295912A (en) | 2000-10-18 | 2000-10-18 | Injection machine energy-saving device and method based on frequency-converting speed regulator |
| CNB011356804A CN1137812C (en) | 2000-10-18 | 2001-10-16 | Injection machine energy-saving equipment based on frequency conversion speed controller and its method |
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| CN1354079A CN1354079A (en) | 2002-06-19 |
| CN1137812C true CN1137812C (en) | 2004-02-11 |
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| CNB011356804A Expired - Fee Related CN1137812C (en) | 2000-10-18 | 2001-10-16 | Injection machine energy-saving equipment based on frequency conversion speed controller and its method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100372669C (en) * | 2004-06-24 | 2008-03-05 | 深圳市珊星电脑有限公司 | Control device and mothod for raising injection moulding machine production efficiency based on energy-saving frequency change speed regulator |
| CN100415488C (en) * | 2006-01-20 | 2008-09-03 | 宁波华普工业控制技术有限公司 | Energy saving control system of rubber injection shaping machine |
| CN106079337A (en) * | 2016-06-01 | 2016-11-09 | 广州能之原科技股份有限公司 | A kind of servo transformation pressure flow signal conversion method and system |
| CN112045936B (en) * | 2020-08-27 | 2022-04-15 | 上海莘汭驱动技术有限公司 | Dual-channel rotary transformer transmitter |
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