CN204387017U - A kind of mo(u)lding line multi-pump hydraulic station frequency-changing control system - Google Patents
A kind of mo(u)lding line multi-pump hydraulic station frequency-changing control system Download PDFInfo
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- CN204387017U CN204387017U CN201420861937.3U CN201420861937U CN204387017U CN 204387017 U CN204387017 U CN 204387017U CN 201420861937 U CN201420861937 U CN 201420861937U CN 204387017 U CN204387017 U CN 204387017U
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Abstract
This application discloses a kind of mo(u)lding line multi-pump hydraulic station frequency-changing control system, the mo(u)lding line multi-pump hydraulic station frequency-changing control system that the application provides, by EPA communication modes, by controller, frequency variator, variable-frequency motor is connected with pump group, according to the pressure in loop, pump group place, the pressure that the information such as liquid level and flow control pump group exports and flow, form closed loop control, realize the accurate control to multi-pump hydraulic station, thus do not need to arrange relief valve, reduce system heating, reduce energy dissipation, the working life of raising equipment, quick output, Reliable guarantee fuel supply flow rate, simultaneously, waste owing to there is no waste heat, oil cooling system drops into little, reduce system cost.And, realize the automatic speed regulation to pump group by variable-frequency motor, realize stepless speed regulation, stable system pressure, there is not compression shock.In addition, equipment noise is little, improves working environment.
Description
Technical field
The application relates to casting technology field, particularly relates to a kind of mo(u)lding line multi-pump hydraulic station frequency-changing control system.
Background technique
Along with the progress of technology, static pressure molding line was high with automaticity in recent years, molding rate is high, surface hardness is high and evenly, the advantage such as mold cavity surface is smooth, become the preferred unit of each foundry.The main driving mode of static pressure molding line is hydraulic driving, hydraulically powered advantage to realize stepless speed regulation, under equal output power, fluid pressure drive device volume is little, lightweight, moment of torsion large, it is large to exert oneself, and realizes straight line motion and rotary motion easily by oil hydraulic cylinder and motor.
The hydraulic system of static pressure molding line belongs to large-scale multi-pump hydraulic station, in actual moving process, owing to not being balanced to the demand of hydraulic oil, but the process of a frequent fluctuation, in order to maintain the stable operation of equipment, in prior art, mostly by quantity and the size of rational matching fluid press pump and accumulator, reasonably select power of motor, realize a large amount of fuel feeding when need of production and maintain system pressure as far as possible stablizing, reduce the waste of the energy, but also there is following shortcoming in this mode simultaneously:
1, compression shock.Owing to inevitably causing compression shock in running, equipment runs and will produce very large noise, work under bad environment.
2, energy loss.Adjust flow, the output flow of hydraulic station and use traffic are matched, unnecessary flow, by relief valve overflow, just inevitably causes system to generate heat, causes energy loss.
3, service life of equipment is low.Hydraulic shock can cause reduce the working life of hydraulic parts and equipment.
4, equipment cost is high.For guarantee equipment can obtain sufficient hydraulic oil, just must make that pump delivery is enough large and quantity is abundant, and with system will be caused during oily low ebb to generate heat, will the Processing capacity of corresponding increase oil cooling system, and then increase equipment cost.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of mo(u)lding line multi-pump hydraulic station frequency-changing control system, realize the VFC to mo(u)lding line multi-pump hydraulic station, reduction equipment runs noise, improve working environment, reduce energy dissipation, improve capacity usage ratio and service life of equipment, reduce equipment cost, technological scheme is as follows:
The utility model provides a kind of mo(u)lding line multi-pump hydraulic station frequency-changing control system to comprise:
Controller, frequency variator, variable-frequency motor, pump group;
The output of described controller connects described frequency variator, described controller according to the described pump group received the output frequency of frequency variator described in pressure in the loop, liquid level and flow control;
Described frequency variator is connected with described variable-frequency motor, and described frequency variator controls the rotating speed of described variable-frequency motor according to the output frequency of self;
Described variable-frequency motor connects described pump group, and described variable-frequency motor controls pressure and the flow of described pump group output according to the rotating speed of self.
Alternatively, encoder is connected with between described frequency variator and described variable-frequency motor.
Alternatively, also comprise threephase asynchronous machine, described threephase asynchronous machine is connected with described pump group.
Alternatively, described controller receives described pump group institute pressure, liquid level and the flow in the loop that measuring instrument detects, and according to described pressure, liquid level and flow information output flow and Stress control instruction, the output frequency of control frequency variator.
Alternatively, described measuring instrument comprises pressure transducer, displacement transducer and liquid level sensor.
Alternatively, described pump group comprises multiple stage pump.
Alternatively, described controller is FPGA PLC.
Alternatively, described system also comprises: be connected to the speed reducer between described pump group and described variable-frequency motor.
The technological scheme provided from the embodiment of the present application, the mo(u)lding line multi-pump hydraulic station frequency-changing control system that the application provides, by EPA communication modes, by controller, frequency variator, variable-frequency motor is connected with pump group, according to the pressure in loop, pump group place, the pressure that the information such as liquid level and flow control pump group exports and flow, form closed loop control, realize the accurate control to multi-pump hydraulic station, thus do not need to arrange relief valve, reduce system heating, reduce energy dissipation, the working life of raising equipment, quick output, Reliable guarantee fuel supply flow rate, simultaneously, waste owing to there is no waste heat, oil cooling system drops into little, reduce system cost.And, realize the automatic speed regulation to pump group by variable-frequency motor, realize stepless speed regulation, stable system pressure, there is not compression shock.In addition, equipment noise is little, improves working environment.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, 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.
Fig. 1 is the theory diagram of a kind of mo(u)lding line multi-pump hydraulic station of the embodiment of the present application frequency-changing control system.
Embodiment
Technological scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technological scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.
See Fig. 1, the theory diagram of the mo(u)lding line multi-pump hydraulic station frequency-changing control system that the embodiment of the present application provides.
As shown in Figure 1, described mo(u)lding line multi-pump hydraulic station frequency-changing control system comprises: controller 1, frequency variator 2, pump group 3, variable-frequency motor 4.Wherein, described controller can be PLC(Programmable Logic Controller, programmable logic controller (PLC)) or other industrial control unit (ICU).
The output terminal of controller 1 connects described frequency variator 2, described controller 1 according to the described pump group 3 received the information such as pressure, liquid level and flow in the loop, form closed loop control, control the output frequency of described frequency variator 2.
Frequency variator 2 is connected with described variable-frequency motor 4, and frequency variator 2 controls the rotating speed of described variable-frequency motor 4 according to the output frequency of self.
Variable-frequency motor 4 connects described pump group 3, and described variable-frequency motor 4 controls pressure and the flow of described pump group 3 output according to the rotating speed of self.Pump group 3 connects the rotating shaft output terminal of variable-frequency motor 4, and variable-frequency motor 4 drives pump group 3 to rotate.
The quantity of variable-frequency motor 4 can be multiple, and the quantity of frequency variator 2 is corresponding with the quantity of variable-frequency motor.Controller 1 can by controlling the quantity of variable-frequency motor that the output of frequency variator 2 control to put into operation and the rotating speed of variable-frequency motor.
According to the controling parameters of need of production setting controller 1, controller 1 controls the output frequency of frequency variator 2 according to described controling parameters, frequency variator 2 controls the access quantity of described variable-frequency motor 4 and the rotating speed of variable-frequency motor 4, so control pump group 3 export pressure and flow.Thus make the output time of multiple pump group meet need of production and not exceed needed for system.
When the hydraulic fluid flow rate needed is larger, increases the quantity that puts into operation of variable-frequency motor, meanwhile, the rotating speed of variable-frequency motor can also be improved, finally realize the output of the large discharge of pump group.Automatically the rotating speed of variable-frequency motor 4 is adjusted, the output flow of final control pump group 3 according to the change of the hydraulic pressure in loop, pump group 3 place and the oil-filled state of accumulator.
The mo(u)lding line multi-pump hydraulic station frequency-changing control system that the application provides, by EPA communication modes, by controller, frequency variator, variable-frequency motor is connected with pump group, according to the pressure in loop, pump group place, the pressure that the information such as liquid level and flow control pump group exports and flow, form closed loop control, realize the accurate control to multi-pump hydraulic station, thus do not need to arrange relief valve, reduce system heating, reduce energy dissipation, the working life of raising equipment, quick output, Reliable guarantee fuel supply flow rate, simultaneously, waste owing to there is no waste heat, oil cooling system drops into little, reduce system cost.And, realize the automatic speed regulation to pump group by variable-frequency motor, realize stepless speed regulation, stable system pressure, there is not compression shock.In addition, equipment noise is little, improves working environment.
Alternatively, be also connected with encoder 5 between described frequency variator 2 and variable-frequency motor 4, realize the communication between variable-frequency motor 4 and frequency variator 2 by encoder 5.
In another embodiment of the application, the part variable-frequency motor that threephase asynchronous machine replaces in above-described embodiment can be adopted.The rotating shaft output terminal of threephase asynchronous machine connects pump group.In system, the concrete usage quantity of variable-frequency motor and common electric machine is depending on the concrete condition of need of production.Because the cost of threephase asynchronous machine is lower than the cost of variable-frequency motor, thus reduce system cost.
Alternatively, can also speed reducer be provided with between frequency variator 2 and variable-frequency motor 4, thus realize the accurate control to hydraulic fluid flow rate further.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for parts and another component region to separate, and not necessarily requires or imply the ordinal relation that there is any this reality between these parts.
The above is only the embodiment of the application; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of the application.
Claims (8)
1. a mo(u)lding line multi-pump hydraulic station frequency-changing control system, is characterized in that, comprising: controller, frequency variator, variable-frequency motor, pump group;
The output of described controller connects described frequency variator, described controller according to the described pump group received the output frequency of frequency variator described in pressure in the loop, liquid level and flow control;
Described frequency variator is connected with described variable-frequency motor, and described frequency variator controls the rotating speed of described variable-frequency motor according to the output frequency of self;
Described variable-frequency motor connects described pump group, and described variable-frequency motor controls pressure and the flow of described pump group output according to the rotating speed of self.
2. mo(u)lding line multi-pump hydraulic station frequency-changing control system according to claim 1, is characterized in that, be connected with encoder between described frequency variator and described variable-frequency motor.
3. mo(u)lding line multi-pump hydraulic station frequency-changing control system according to claim 1, is characterized in that, also comprise threephase asynchronous machine, and described threephase asynchronous machine is connected with described pump group.
4. mo(u)lding line multi-pump hydraulic station frequency-changing control system according to claim 1, it is characterized in that, described controller receive the described pump group that measuring instrument detects pressure, liquid level and flow in the loop, and according to described pressure, liquid level and flow information output flow and Stress control instruction, control the output frequency of frequency variator.
5. mo(u)lding line multi-pump hydraulic station frequency-changing control system according to claim 4, it is characterized in that, described measuring instrument comprises pressure transducer, displacement transducer and liquid level sensor.
6. mo(u)lding line multi-pump hydraulic station frequency-changing control system according to claim 1, is characterized in that, described pump group comprises multiple stage pump.
7. mo(u)lding line multi-pump hydraulic station frequency-changing control system according to claim 1, is characterized in that, described controller is FPGA PLC.
8. mo(u)lding line multi-pump hydraulic station frequency-changing control system according to claim 1, is characterized in that, also comprise: be connected to the speed reducer between described pump group and described variable-frequency motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420861937.3U CN204387017U (en) | 2014-12-31 | 2014-12-31 | A kind of mo(u)lding line multi-pump hydraulic station frequency-changing control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420861937.3U CN204387017U (en) | 2014-12-31 | 2014-12-31 | A kind of mo(u)lding line multi-pump hydraulic station frequency-changing control system |
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| Publication Number | Publication Date |
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| CN204387017U true CN204387017U (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420861937.3U Expired - Fee Related CN204387017U (en) | 2014-12-31 | 2014-12-31 | A kind of mo(u)lding line multi-pump hydraulic station frequency-changing control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419706A (en) * | 2022-08-30 | 2022-12-02 | 上汽通用五菱汽车股份有限公司 | Constant-temperature oil supply method and equipment for gearbox and programmable logic controller |
-
2014
- 2014-12-31 CN CN201420861937.3U patent/CN204387017U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419706A (en) * | 2022-08-30 | 2022-12-02 | 上汽通用五菱汽车股份有限公司 | Constant-temperature oil supply method and equipment for gearbox and programmable logic controller |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150610 Termination date: 20161231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |