CN201989307U - Frequency conversion energy-saving control system of hydraulic injection molding machine - Google Patents
Frequency conversion energy-saving control system of hydraulic injection molding machine Download PDFInfo
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- CN201989307U CN201989307U CN2011200528283U CN201120052828U CN201989307U CN 201989307 U CN201989307 U CN 201989307U CN 2011200528283 U CN2011200528283 U CN 2011200528283U CN 201120052828 U CN201120052828 U CN 201120052828U CN 201989307 U CN201989307 U CN 201989307U
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Abstract
The utility model relates to a frequency conversion energy-saving control system of a hydraulic injection molding machine, which comprises a hydraulic injection molding machine control cabinet and a frequency conversion control cabinet. A main circuit breaker, a wire inlet reactor, a frequency converter and a wire outlet reactor which are successively serially connected with each other are arranged in the frequency conversion control cabinet from top to bottom, an output end of a PLC (programmable logic controller) is connected with a signal input end of the frequency converter, a wire outlet end of the wire outlet reactor is connected with a first frequency conversion contactor and a second frequency conversion contactor which are connected in parallel, the wire outlet end of the wire outlet reactor is respectively connected into corresponding wiring terminals of three-phase windings of a motor of an oil pump, when a frequency conversion operation mode is selected, the PLC synchronously controls the frequency converter to output frequencies corresponding to various processes according to action signals of various process electromagnetic valves and the like of the injection molding machine, controls the motor of the oil pump to realize flow-variable operation, meets requirements of injection molding processes to oil pressure and oil quantity and leads the injection molding machine to be operated in an energy-saving manner, as procedures of an original injection molding machine control system are not changed, various protection functions of the original control system to the injection molding machine are available, safe and reliable operation of equipment can be guaranteed, and further the frequency conversion energy-saving control system brings convenience for users to realize energy-saving modification.
Description
Technical field
The utility model relates to the frequency conversion automation control system, the especially a kind of hydraulic injection molding machine energy saving control system of frequency conversion in use that can realize energy-saving run.
Background technology
Most at present injection machines is to adopt hydraulicdriven injection machine, and the needed power of the technological action process of injection machine is provided by the oil pump in the hydraulic system substantially, and traditional hydraulic oil pump motor adopts star triangle power frequency operation pattern more.The leading-out terminal of power contactor, Y type contactor and △ type contactor links to each other with the corresponding wiring terminal of Oil pump electrical machinery three phase windings respectively in the hydraulic injection molding machine switch board, the input of the injection machine master control borad control connection injection machine breaker in the hydraulic injection molding machine switch board, the output of injection machine breaker is connected into the end of incoming cables of power contactor and △ type contactor respectively.
Injection machine complete work period of workpiece of processing generally is divided into several operations such as matched moulds, locked mode, injection, pressurize, cooling, the demoulding, die sinking, and wherein pressurize and cooling, the demoulding and die sinking are carried out simultaneously, and promptly in the pressure maintaining period, mould cools off in water flowing; In the process of die sinking, the demoulding thimble in the mould is stretched out gradually by the shelter, makes attached to the workpiece on the mould to come off, and the die sinking back process that puts in place finishes.In one of injection machine complete work period, the load variations of each operation is very big, and the desired flow of hydraulic system is different with pressure: general matched moulds, the demoulding and the required oil pressure of die sinking system are lower, and the time is shorter; Injection, pressurize, the required oil pressure of cooling system are higher, and the time is longer, is generally 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.Because traditional hydraulic oil pump is the constant displacement pump that belongs to power frequency operation, its fuel delivery is constant, the variation of flow and pressure is regulated by flow proportion valve and pressure valve in the injection machine course of work, unnecessary oil mass flows back to fuel tank through overflow valve, the wearing and tearing of valve and oil pump have so just been aggravated, cause oily temperature rise, noise of motor is excessive.In addition, from the design of injection machine, usually when design oil pump all to leave surplus, generally consider 10% ~ 15%, so there is serious " low load with strong power " phenomenon in the selection of oil pump, cause a large amount of wastes of electric energy.Therefore, the hydraulic injection molding machine of quantitative hydraulic oil pump is carried out the frequency control transformation, saving a large amount of electric energy, this for the saving energy and reduce the cost of enterprise, increasing economic efficiency has great importance.
The utility model content
The purpose of this utility model provides a kind of hydraulic injection molding machine energy saving control system of frequency conversion in use, the problems of a large amount of wastes of electric energy when moving with the hydraulic injection molding machine that solves quantitative hydraulic oil pump.
For achieving the above object, a kind of hydraulic injection molding machine energy saving control system of frequency conversion in use of the present utility model comprises the hydraulic injection molding machine switch board, the input of the injection machine master control borad control connection injection machine breaker in this hydraulic injection molding machine switch board, the output of injection machine breaker is connected into the end of incoming cables of power contactor and △ type contactor respectively, power contactor, the leading-out terminal of Y type contactor and △ type contactor is connected into the corresponding wiring terminal of Oil pump electrical machinery three phase windings respectively, also comprise the VFC cabinet, be provided with the main circuit breaker of serial connection successively in this VFC cabinet from top to bottom, the inlet wire reactor, frequency converter and outlet reactor, the output of PLC links to each other with the signal input part of described frequency converter, the leading-out terminal of described outlet reactor is connected with the first frequency conversion contactor and the second frequency conversion contactor in parallel, the leading-out terminal of these two frequency conversion contactors is connected into the corresponding wiring terminal of Oil pump electrical machinery three phase windings respectively, be connected with injection machine technology controlling and process signal terminal on the signal output part of described injection machine master control borad, this injection machine technology controlling and process signal terminal links to each other with PLC in the VFC cabinet by cable.
The top of described VFC cabinet madial wall is provided with aerofoil fan, this aerofoil fan links to each other with the output of fan contactor, the input of fan contactor links to each other with the output of two atomic type breakers, and the input of these two atomic type breakers is connected into the electric power incoming line terminal of VFC cabinet.
The panel of described VFC cabinet is provided with Oil pump electrical machinery frequency conversion, power frequency operation mode selection switch, the voltmeter of measuring three phase mains and ammeter, mode operation indicator lamp and the frequency conversion malfunction indicator lamp of Oil pump electrical machinery converting operation.
Described frequency converter is provided with master control input terminal R, S, T, master control outlet terminal U, V, W and ground terminal E, also is provided with how fast instruction interface terminal, frequency converter terminal runnable interface terminal FWD, fault reseting interface terminal RST and public terminal COM.
Described PLC comprises host module LOGO and switching value expansion module 1DI, the input of host module LOGO is connected to the normally opened contact signal of frequency conversion power frequency selector switch SA1, converting operation switch S A2, each technology magnetic valve of injection machine and actuating signal, the output of host module LOGO is connected to the control coil of first, second frequency conversion contactor and the how fast command signal terminal and the public terminal COM of frequency converter, and the output of switching value expansion module 1DI is connected to Oil pump electrical machinery frequency conversion, the indication of power frequency operation pattern and power frequency loop interlock relay KA1.
Further, the normally opened contact signal of each technology magnetic valve of described injection machine and actuating signal comprises that advance J2, injection J3, pressurize J4, preformed J5, She Tai of matched moulds JI, She Tai retreats J6, die sinking J7, ejects the J8 signal.
Described first, second frequency conversion contactor leading-out terminal is connected into the corresponding wiring terminal of Oil pump electrical machinery three phase windings respectively by power cable, be equipped with ferrite bead on the described power cable respectively.
A kind of hydraulic injection molding machine energy saving control system of frequency conversion in use of the present utility model has following beneficial effect:
1, The whole control system adopts frequency conversion, power frequency conversion and control mode, has kept the original star triangle of injection machine Oil pump electrical machinery control loop, guarantees still can switch to the work of power frequency pattern when overhauling just in case the energy-saving and frequency-variable controller breaks down, to keep ordinary production.
2, Oil pump electrical machinery adopts Frequency Converter Control, has significantly reduced the vibrations of matched moulds, die sinking, has stablized production technology, improve the class and the quality of product, reduced mechanical breakdown, prolonged mechanical service life, simultaneously also save electric energy, on average economized on electricity 38%, produced good economic benefit.
3, after VFC and injection machine synchronous operation, VFC cabinet debugging are finished, even mold exchange and change machined parameters more all need not the VFC cabinet is carried out program and circuit adjustment.
4, the hydraulic injection molding machine heating of oil obviously reduced after frequency conversion was transformed, and is generally low more than 15 ~ 20 ℃ than average oil temperature drop before transforming; Hydraulic oil can obtain prolonging service life; Injection machine cooling water amount can be saved more than 30%.
5, VFC improves the defencive function of injection machine whole system: the 1. protection of frequency converter self; 2. to the protection of motor, as electric current restriction, overload, output short-circuit or output ground connection etc.; 3. the mechanical damage that causes because of maloperation is protected, as not to melt temperature by force colloidal sol cause damage of rocket head, gun barrel, screw rod or colloidal sol motor etc.
Description of drawings
Fig. 1 is an embodiment hydraulic injection molding machine variable frequency energy saving reforming system schematic;
Fig. 2 is the main circuit electrical schematic diagram of the VFC cabinet of embodiment hydraulic injection molding machine;
Fig. 3 is the secondary circuit wiring diagram of the VFC cabinet of embodiment hydraulic injection molding machine.
The specific embodiment
Hydraulic injection molding machine energy saving control system of frequency conversion in use of the present utility model is an example with the HF240 type hydraulic injection molding machine variable frequency energy saving reforming of homemade certain brand, is elaborated.
In the hydraulic injection molding machine control system as shown in Figure 1, 2, 3, comprise HF240 hydraulic injection molding machine and original control system thereof and VFC cabinet two large divisions, hydraulic injection molding machine Oil pump electrical machinery power is 30KW, the crude oil pump motor adopts star triangle power frequency control model, is provided with power contactor M, Y type contactor S and △ type contactor D in this power frequency control loop.The input of injection machine master control borad control connection injection machine breaker, the output of injection machine breaker is connected into the end of incoming cables of power contactor and △ type contactor respectively, and the leading-out terminal of power contactor, Y type contactor and △ type contactor is connected into the corresponding wiring terminal of Oil pump electrical machinery three phase windings respectively.Be connected with injection machine technology controlling and process signal terminal on the injection machine master control borad signal output part, this injection machine technology controlling and process signal terminal links to each other with Programmable Logic Controller PLC in the VFC cabinet by cable.
Be provided with main circuit breaker QF, inlet wire reactor AC1, frequency converter VVVF and the outlet reactor AC2 of serial connection successively in the VFC cabinet from top to bottom, the output of Programmable Logic Controller PLC is also referred to as how fast instruction interface terminal with frequency converter VVVF by multistage speed command Interface Terminal and links to each other, the leading-out terminal of outlet reactor AC2 is connected with the first frequency conversion contactor KM1 and the second frequency conversion contactor KM2 in parallel, and the leading-out terminal of these two frequency conversion contactors is connected into the corresponding wiring terminal of Oil pump electrical machinery three phase windings respectively by power cable.The input of Programmable Logic Controller PLC and main circuit breaker is connected into the electric power incoming line terminal of VFC cabinet.
Described frequency converter is selected general biography PI7800-030Z type injection machine tailored version frequency converter for use, and frequency converter is provided with master control input terminal R, S, T, is provided with master control outlet terminal U, V, W, and ground terminal E; Frequency converter also is provided with how fast instruction interface terminal SS1, SS2, the SS3 that is connected with PLC, and frequency converter terminal runnable interface terminal FWD, fault reseting interface terminal RST, and the public terminal COM of these interfaces.
The inlet wire reactor adopts DTR-30KW type AC reactor, and this reactor inlet wire side and main circuit breaker outlet side are joined, and main circuit breaker selects for use NSE-100A to mould the shell air-break, and inlet wire reactor outlet side and frequency converter inlet wire side (R, S, T) are joined.
Described outlet reactor adopts DTT-30KW type AC reactor, and this reactor inlet wire side and frequency converter outlet side (U, V, W) are joined, and this reactor outlet side and two three-phase ac contactor inlet wire sides are joined.
The described first frequency conversion contactor KM1 and the second frequency conversion contactor KM2 are three-phase ac contactor, all select LC1-D50 type A.C. contactor for use, the input parallel connection of these two frequency conversion contactors, and be electrically connected with the output of outlet reactor, the first frequency conversion contactor KM1 is in parallel by the power contactor M of the former star triangle of power cable and injection machine power frequency control loop, and links to each other with the binding post (U1, V1, W1) of hydraulic injection molding machine Oil pump electrical machinery three phase windings by motor cable; The second frequency conversion contactor KM2 is in parallel by the △ type contactor D of the former star triangle of power cable and injection machine power frequency control loop, and links to each other with the binding post (U2, V2, W2) of hydraulic injection molding machine Oil pump electrical machinery three phase windings by motor cable.
VFC cabinet madial wall top is provided with 2 aerofoil fans, all select the AF2123XBL-220V type for use, the parallel connection of 2 aerofoil fan inlet wires, and link to each other with the output of fan contactor, the input of fan contactor is also referred to as two atomic disconnected outputs with two atomic type breakers and links to each other, two atomic disconnected inputs are connected into the electric power incoming line terminal of VFC cabinet, and the fan contactor is selected LC1-D09 type A.C. contactor for use, two atomic disconnected DZ47-60/2P (2A) the type miniature circuit breakers of selecting for use.
The panel of VFC cabinet is provided with hydraulic oil pump motor frequency conversion, power frequency mode selection switch SA1, converting operation switch S A2, mode of operation indicator lamp (1HL, 2HL), power supply indicator 3HL, converting operation indicator lamp 4HL, frequency conversion malfunction indicator lamp 5HL etc.The panel of VFC cabinet is provided with the voltmeter of measurement three phase mains and the ammeter of hydraulic oil pump motor frequency conversion operation etc., and voltmeter adopts 6L2-500V, and ammeter is selected 6L2-200A/5A for use.
As Fig. 1,2, shown in 3, the VFC cabinet is provided with Programmable Logic Controller PLC, this PLC comprises host module LOGO and switching value expansion module 1DI, the input of host module LOGO is connected to frequency conversion power frequency selector switch 1SA, converting operation switch 2SA, the normally opened contact signal of each technology magnetic valve of injection machine and actuating signal (comprises matched moulds JI, penetrate the platform J2 that advances, injection J3, pressurize J4, preformed J5, penetrate platform and retreat J6, die sinking J7, eject signals such as J8), the output of host module is connected to first, the control coil of the second frequency conversion contactor, power frequency loop interlock relay 1KA and frequency converter multistage speed command signal terminal COM, SS1, SS2, SS3, the output of switching value expansion module 1DI is connected to the Oil pump electrical machinery frequency conversion, power frequency operation pattern indication 1HL, 2HL etc.
For further reducing the humorous wave interference of output side transducer, on the power cable of two frequency conversion contactor outlet sides, all be equipped with ferrite bead respectively.Also be equipped with ferrite bead on the main inlet wire cable between main circuit breaker QF and distribution power supply.
When using, hydraulic injection molding machine Oil pump electrical machinery control system selects frequency conversion or power frequency operation hydraulic electric motor by VFC frequency conversion power frequency mode selection switch cashier's office in a shop; When selecting the converting operation pattern, PLC is according to actuating signals such as each technology magnetic valves of injection machine, the Synchronization Control frequency converter is exported the frequency of each technology correspondence, thereby control Oil pump electrical machinery unsteady flow amount operation, satisfy the demand of different Shooting Techniques, and reach the purpose of energy-saving running of injection moulding machine oil pressure, oil mass; Owing to the program of not changing original control system for shot machine, original control system is all effective to the kinds of protect function of injection machine, guarantees the safe and reliable operation of equipment, also is convenient to the user and implements reducing energy consumption in addition.Concrete operation principle is as follows:
1, frequency conversion working method.(1) connect VFC cabinet working power, power supply indicator 3HL is bright.When mode selection switch SA1 closes when " variable mode ", power frequency interlock relay KA1 coil gets electronic work, the auxiliary normally closed interlock of KA1 disconnects, the former star triangle of injection machine control loop disconnects, be that 3 power frequency contactors of Oil pump electrical machinery can't get electric work, the control of PLC output signal 2 frequency conversion contactor KM1, KM2 coils get electronic work, and frequency converter and three-phase alternating-current motor circuit are connected, and wait for the frequency converter operation; Power frequency pattern indicator lamp 1HL does not have indication simultaneously, and 2HL is bright for the variable mode indicator lamp.(2) the frequency converter timing course of work.Press low-converter firing switch SA2, frequency converter brings into operation, and 4HL is bright for the frequency conversion relay indicating light, and the injection machine Oil pump electrical machinery is started working.The matched moulds JI of the injection machine that VFC cabinet main control PLC receives according to its input, penetrate the platform J2 that advances, injection J3, pressurize J4, preformed J5, penetrate platform and retreat J6, die sinking J7, eject after technical process control signals such as J8 handle, output switching signal is given the multistage speed control system signal port (COM of frequency converter immediately, SS1, SS2, SS3), it also is the given signal of frequency converter output frequency, satisfy of the requirement of the various technologies of injection machine with this regulative mode to charge oil pressure and flow, and reach purpose of energy saving, satisfied the different hydraulic pressure of injection machine different process stage Hydraulic Power Transmission System and the requirement of flow again.(3) protection of frequency converter and troubleshooting.Frequency converter self has kinds of protect functions such as overcurrent, overload, overvoltage, under-voltage, short circuit; it can not only protect frequency converter self; and can protect the hydraulic oil pump motor; further protect hydraulic injection molding machine system, mechanical system; prevent the harm that inappropriate operation may bring, so do not need to establish in addition special holding circuit.When frequency converter breaks down or protects, frequency converter output signal TA1 and TC1 two ends often open signal closes, malfunction indicator lamp 5HL indication waits for that the operating maintenance personnel fix a breakdown.
2, power frequency working method.When mode selection switch SA1 closes to " power frequency work " pattern, 2 frequency conversion contactors of PLC programme-control KM1, KM2 are failure to actuate, the frequency conversion operating circuit can't get, PLC programme-control power frequency interlock relay KA1 coil gets electronic work simultaneously, KA1 assists the normally closed interlock closure, the former star triangle of injection machine control loop is connected, and operating personnel can utilize original star triangle control model fuel primer pump motor, and power frequency pattern indicator lamp 1HL is bright simultaneously.
Claims (7)
1. hydraulic injection molding machine energy saving control system of frequency conversion in use, comprise the hydraulic injection molding machine switch board, the input of the injection machine master control borad control connection injection machine breaker that this hydraulic injection molding machine switch board comprises, the output of injection machine breaker is connected into the end of incoming cables of power contactor and △ type contactor respectively, power contactor, the leading-out terminal of Y type contactor and △ type contactor is connected into the corresponding wiring terminal of Oil pump electrical machinery three phase windings respectively, it is characterized in that: also comprise the VFC cabinet, be provided with the main circuit breaker of serial connection successively in this VFC cabinet from top to bottom, the inlet wire reactor, frequency converter and outlet reactor, the output of PLC links to each other with the signal input part of described frequency converter, the leading-out terminal of described outlet reactor is connected with the first frequency conversion contactor and the second frequency conversion contactor in parallel, the leading-out terminal of these two frequency conversion contactors is connected into the corresponding wiring terminal of Oil pump electrical machinery three phase windings respectively, be connected with injection machine technology controlling and process signal terminal on the signal output part of described injection machine master control borad, this injection machine technology controlling and process signal terminal links to each other with PLC in the VFC cabinet by cable.
2. a kind of hydraulic injection molding machine energy saving control system of frequency conversion in use according to claim 1, it is characterized in that: the top of described VFC cabinet madial wall is provided with aerofoil fan, this aerofoil fan links to each other with the output of fan contactor, the input of fan contactor links to each other with the output of two atomic type breakers, and the input of these two atomic type breakers is connected into the electric power incoming line terminal of VFC cabinet.
3. a kind of hydraulic injection molding machine energy saving control system of frequency conversion in use according to claim 2 is characterized in that: the panel of described VFC cabinet is provided with Oil pump electrical machinery frequency conversion, power frequency operation mode selection switch, the voltmeter of measuring three phase mains and ammeter, mode operation indicator lamp and the frequency conversion malfunction indicator lamp of Oil pump electrical machinery converting operation.
4. a kind of hydraulic injection molding machine energy saving control system of frequency conversion in use according to claim 1, it is characterized in that: described frequency converter is provided with master control input terminal R, S, T, master control outlet terminal U, V, W and ground terminal E, also is provided with how fast instruction interface terminal, frequency converter terminal runnable interface terminal FWD, fault reseting interface terminal RST and public terminal COM.
5. a kind of hydraulic injection molding machine energy saving control system of frequency conversion in use according to claim 1, it is characterized in that: described PLC comprises host module LOGO and switching value expansion module 1DI, the input of host module LOGO is connected to frequency conversion power frequency selector switch SA1, converting operation switch S A2, the normally opened contact signal of each technology magnetic valve of injection machine and actuating signal, the output of host module LOGO is connected to first, the how fast command signal terminal and the public terminal COM of the control coil of the second frequency conversion contactor and frequency converter, the output of switching value expansion module 1DI is connected to the Oil pump electrical machinery frequency conversion, indication of power frequency operation pattern and power frequency loop interlock relay KA1.
6. a kind of hydraulic injection molding machine energy saving control system of frequency conversion in use according to claim 5 is characterized in that: the normally opened contact signal of each technology magnetic valve of described injection machine and actuating signal comprises that advance J2, injection J3, pressurize J4, preformed J5, She Tai of matched moulds JI, She Tai retreats J6, die sinking J7, ejects the J8 signal.
7. according to each described a kind of hydraulic injection molding machine energy saving control system of frequency conversion in use among the claim 1-6, it is characterized in that: described first, second frequency conversion contactor leading-out terminal is connected into the corresponding wiring terminal of Oil pump electrical machinery three phase windings respectively by power cable, be equipped with ferrite bead on the described power cable respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200528283U CN201989307U (en) | 2011-03-02 | 2011-03-02 | Frequency conversion energy-saving control system of hydraulic injection molding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200528283U CN201989307U (en) | 2011-03-02 | 2011-03-02 | Frequency conversion energy-saving control system of hydraulic injection molding machine |
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| CN2011200528283U Expired - Fee Related CN201989307U (en) | 2011-03-02 | 2011-03-02 | Frequency conversion energy-saving control system of hydraulic injection molding machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103030029A (en) * | 2012-12-05 | 2013-04-10 | 东莞市博雅装订器材有限公司 | Control cabinet for take-up machine |
| CN105599252A (en) * | 2015-12-30 | 2016-05-25 | 太原理工大学 | Electro-hydraulic hybrid energy coordinative recovery control device for injection molding machine |
| CN106169858A (en) * | 2016-08-29 | 2016-11-30 | 力博重工科技股份有限公司 | Converter cubicle switchgear |
| CN114321103A (en) * | 2021-12-24 | 2022-04-12 | 杭州电子科技大学 | Multi-stage pressure flow control method for permanent magnet synchronous motor hydraulic system |
-
2011
- 2011-03-02 CN CN2011200528283U patent/CN201989307U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103030029A (en) * | 2012-12-05 | 2013-04-10 | 东莞市博雅装订器材有限公司 | Control cabinet for take-up machine |
| CN105599252A (en) * | 2015-12-30 | 2016-05-25 | 太原理工大学 | Electro-hydraulic hybrid energy coordinative recovery control device for injection molding machine |
| CN105599252B (en) * | 2015-12-30 | 2017-08-22 | 太原理工大学 | One kind injection mechanical electronic hydraulic mixed tensor coordinates recovery control device |
| CN106169858A (en) * | 2016-08-29 | 2016-11-30 | 力博重工科技股份有限公司 | Converter cubicle switchgear |
| CN114321103A (en) * | 2021-12-24 | 2022-04-12 | 杭州电子科技大学 | Multi-stage pressure flow control method for permanent magnet synchronous motor hydraulic system |
| CN114321103B (en) * | 2021-12-24 | 2024-02-06 | 杭州电子科技大学 | Multistage pressure flow control method for permanent magnet synchronous motor hydraulic system |
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Granted publication date: 20110928 Termination date: 20130302 |