CN101303013A - Extrusion granulating machine unit gear pump speed control system - Google Patents
Extrusion granulating machine unit gear pump speed control system Download PDFInfo
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- CN101303013A CN101303013A CNA200810010627XA CN200810010627A CN101303013A CN 101303013 A CN101303013 A CN 101303013A CN A200810010627X A CNA200810010627X A CN A200810010627XA CN 200810010627 A CN200810010627 A CN 200810010627A CN 101303013 A CN101303013 A CN 101303013A
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- gear pump
- pressure
- speed
- motor
- control system
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Abstract
The invention relates to extruding granulation equipment, in particular to a gear pump device of a large-sized extruding granulator set. A gear pump speed control system of the extruding granulator set is provided by the invention; an outlet of a front barrel of the gear pump is communicated with the gear pump which is communicated with a rear barrel of the gear pump, a motor of the gear pump is connected with a speed regulator, a fused mass pressure sensor used for measuring the actual value of the fused mass pressure at an inlet of the gear pump and transmitting a pressure signal to a controller is arranged on the front barrel of the gear pump, and after the signal processing, the controller is drivingly connected with the speed regulator. Compared with the existing manual operation for the control of pressure at the inlet of the gear pump, the gear pump speed control system has the advantages of automatic operation, promptness and accuracy, quick response, small overshoot, stable control and high precision, etc.; by utilizing the pressure of fused mass at the inlet of the gear pump to control the rotating speed of the motor of the gear pump, the pressure at the inlet of the gear pump device can be kept stable.
Description
Technical field
The present invention relates to extruding granulation equipment, particularly the gear pump arrangement in the large-sized squeezing granulation unit.
Background technique
In the extruder grain unit; because the melt pressure in the cylindrical shell directly has influence on the mixing plasticizing effect of fused materials; if the pressure transient in the cylindrical shell may cause the instability of product performance; therefore take gear pump to regulate the mode of pressure; be that melt enters through the gear pump front barrel, machine barrel after gear pump is adjusted to suitable pressure to enter gear pump then is in the hope of keeping the stable of gear pump inlet pressure; the homogeneity of enhancing product performance is improved the quality of products.And gear pump speed is regulated the manual manual control of employing at present, and control stability is poor, and precision is low, delays time, and is difficult to guarantee high-performance, the high quality of product.
Summary of the invention
The objective of the invention is to overcome above-mentioned not enough problem, a kind of extrusion granulating machine unit gear pump speed control system is provided, the Automatic Control gear pump speed makes the inlet pressure of gear pump stable, and the control accuracy height is in time, stable.
The technological scheme that the present invention is adopted for achieving the above object is: extrusion granulating machine unit gear pump speed control system; gear pump is connected in the outlet of gear pump front barrel; machine barrel behind the gear pump connection gear pump; gear pump motor is connected with arrangements for speed regulation; melt is housed on the gear pump front barrel presses body sensor; melt pressure sensor measurement gear pump inlet melt pressure actual value, and export this pressure signal to controller, controller signals is handled rear driving and is connected arrangements for speed regulation.
Described gear pump motor is direct current or frequency control motor.
Described controller adopts PID control, setting value and melt pressure actual value input to controller, calculate back output gear pump speed regulated value through PID, obtain the gear pump speed actual value by adder after with the stack of gear pump speed regulated value and gear pump speed currency, this actual value is inputed to the gear pump motor arrangements for speed regulation adjust motor speed, the gear pump inlet pressure is stable.
The present invention is provided with the melt pressure sensor at the gear pump front barrel, detect in time, accurately, be transferred to controller and in time adjust pressure automatically, come control gear pump motor regulating device by variation in pressure, compare with existing manual operation control gear pump inlet pressure, has outstanding feature: solved because the product quality problem that gear pump inlet pressure instability causes, automation mechanized operation, promptly and accurately, and adopt the method for PID control to compare with general control mode, it is fast to have speed of response, overshoot is little, characteristics such as accurate height are stablized in control, therefore adopt pid control mode, the pressure by gear pump ingress melt comes the rotating speed of control gear pump motor can make the inlet pressure of gear pump arrangement keep stable.
Embodiment:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a software control flow chart of the present invention.
Embodiment:
Extrusion granulating machine unit gear pump speed control system as shown in Figure 1; gear pump 5 is connected in 6 outlets of gear pump front barrel; machine barrel 4 behind the gear pump connection gear pump; gear pump motor 3 is direct current or frequency control motor; motor is connected with arrangements for speed regulation 2; melt is housed on the gear pump front barrel presses body sensor 7; melt pressure sensor measurement gear pump inlet melt pressure actual value; and this pressure signal is converted into the output of 4-20mA signal by transmitter 8 itself passes to controller 1; controller adopts PID control; software control as shown in Figure 2; system pressure setting value and melt pressure actual value are compared; calculate the regulated value of gear pump speed by PID; and superpose by adder with gear pump present speed value; calculate the actual motion given speed of gear pump, rate signal output and driven speed regulating are adjusted motor speed, guarantee that the gear pump inlet pressure is stable.
Related software control source program fragment is:
XIC(GP_auto)[DTOS(B_pressure_set_I，B_pressure_set_S)
STOR(B_pressure_set_S，B_pressure_set)，
MOV(B_pressure_set，gp_pressure_pid.SP)，
BTD(B_pressure_set_I，0，Local:1:O.Data[17]，0，16)，
BTD(Local:1:I.Data[18]，16，B_pressure_act_I，0，16)
MUL(B_pressure_act_I，4，B_pressure_act_M)，
DTOS(B_pressure_act_M，B_pressure_act_S)
STOR(B_pressure_act_S，B_pressure_act)，
MUL(B_pressure_act_I，4，B_pressure_act_MM)，
BTD(B_pressure_act_MM，0，Local:1:O.Data[16]，16，16)]；
XIC(GP_auto)
PID(gp_pressure_pid，B_pressure_act，0，gp_speed_PID_out，0，0，0)；。
Claims (3)
1, extrusion granulating machine unit gear pump speed control system; gear pump (5) is connected in gear pump front barrel (6) outlet; machine barrel (4) behind the gear pump connection gear pump; gear pump motor (3) is connected with arrangements for speed regulation; it is characterized in that: melt is housed on the gear pump front barrel (6) presses body sensor (7); melt pressure sensor measurement gear pump inlet melt pressure actual value, and export this pressure signal to controller (1), controller signals is handled rear driving and is connected arrangements for speed regulation (2).
2, extrusion granulating machine unit gear pump speed control system according to claim 1 is characterized in that: gear pump motor (3) is direct current or frequency control motor.
3, extrusion granulating machine unit gear pump speed control system according to claim 1 and 2; it is characterized in that: controller (1) adopts PID control; setting value and melt pressure actual value input to controller; calculate back output gear pump speed regulated value through PID; obtain the gear pump speed actual value by adder after with the stack of gear pump speed regulated value and gear pump speed currency; this actual value is inputed to the gear pump motor arrangements for speed regulation adjust motor speed, the gear pump inlet pressure is stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810010627XA CN101303013A (en) | 2008-03-12 | 2008-03-12 | Extrusion granulating machine unit gear pump speed control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810010627XA CN101303013A (en) | 2008-03-12 | 2008-03-12 | Extrusion granulating machine unit gear pump speed control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101303013A true CN101303013A (en) | 2008-11-12 |
Family
ID=40113058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810010627XA Pending CN101303013A (en) | 2008-03-12 | 2008-03-12 | Extrusion granulating machine unit gear pump speed control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101303013A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502444A (en) * | 2011-11-23 | 2012-06-20 | 舟山海川船舶机械有限公司 | Control device for hoisting speed of crane |
| CN103804725A (en) * | 2012-11-07 | 2014-05-21 | 东洋橡胶工业株式会社 | Tire member and method for manufacturing the same |
| CN110561715A (en) * | 2019-07-29 | 2019-12-13 | 无锡聚新科技有限公司 | High-pressure melt injection method and high-pressure melt injection system |
-
2008
- 2008-03-12 CN CNA200810010627XA patent/CN101303013A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502444A (en) * | 2011-11-23 | 2012-06-20 | 舟山海川船舶机械有限公司 | Control device for hoisting speed of crane |
| CN102502444B (en) * | 2011-11-23 | 2014-04-02 | 舟山海川船舶机械有限公司 | Control device for hoisting speed of crane |
| CN103804725A (en) * | 2012-11-07 | 2014-05-21 | 东洋橡胶工业株式会社 | Tire member and method for manufacturing the same |
| CN110561715A (en) * | 2019-07-29 | 2019-12-13 | 无锡聚新科技有限公司 | High-pressure melt injection method and high-pressure melt injection system |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081112 |