CN101934598B - Aqueous medium throttle valve speed regulation method - Google Patents
Aqueous medium throttle valve speed regulation method Download PDFInfo
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- CN101934598B CN101934598B CN 201010301028 CN201010301028A CN101934598B CN 101934598 B CN101934598 B CN 101934598B CN 201010301028 CN201010301028 CN 201010301028 CN 201010301028 A CN201010301028 A CN 201010301028A CN 101934598 B CN101934598 B CN 101934598B
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- throttling valve
- medium throttling
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Abstract
The invention relates to an aqueous medium speed regulation device, in particular to an aqueous medium throttle valve speed regulation method utilizing oil pressure to control high pressure and high flow. The method is characterized in that a hydraulic moving beam is driven by a main working cylinder, and a magnetostrictive high-precision displacement sensor is fixed between the hydropress movingbeam and a rear beam; the main working cylinder is connected with a big aqueous medium throttle valve and a small aqueous medium throttle valve; a first pressure transmitter is fixed on the main working cylinder, and a second pressure transmitter is arranged in front of the big aqueous medium throttle valve and the small aqueous medium throttle valve; the magnetostrictive high-precision displacement sensor is fixed at the upper ends of the big aqueous medium throttle valve and the small aqueous medium throttle valve; and an oil pressure servo proportion control valve set is connected with thebig aqueous medium throttle valve and the small aqueous medium throttle valve and driven by a control oil source. The device is controlled through an industrial computer and has the advantages of high precision, long service life and good reliability.
Description
Technical field
Patent of the present invention relates to a kind of aqueous medium arrangements for speed regulation, particularly utilizes the aqueous medium throttle valve speed regulation of oil pressure control high-pressure high-flow.
Background technology
Aqueous medium throttle valve speed regulation mainly is that the position of realizing the moving beam of the accurate control of extrusion speed and hydraulic forging press is accurately controlled, and is a kind of high-pressure high-flow control device.Existing arrangements for speed regulation mainly are the push rod distributing valves, control mode is by direct current generator (or hydraulic cylinder) band moving cam or push rod, to cause that the resistance of motion is large, the transmission link multi-band is controlled unreliable, mechanical clearance is brought control hysteresis, often stuck and inactive because of throttle valve lever, the oil hydraulic system of employing control choke valve is also arranged and regulate the working cylinder operating rate, but because the realistic situation of industry water medium, choke valve does not all have successfully.For above-mentioned reasons, the choke valve in past can't be realized the speed of being undertaken by industrial computer and position closed loop control.
Summary of the invention
The purpose of this invention is to provide a kind of aqueous medium throttle valve speed regulation, this device is controlled by industrial computer, and precision is high, long service life and good reliability.
The purpose of patent of the present invention is to realize like this, design a kind of aqueous medium throttle valve speed regulation, it is characterized in that: the motor-driven beam of hydraulic pressure is driven by Main cylinder, be fixed with the magnetostriction type high accuracy displacement sensor between the motor-driven beam of hydraulic pressure and the back rest, Main cylinder and large aqueous medium throttling valve be connected aqueous medium throttling valve and be connected, be fixed with the first pressure transmitter on the Main cylinder, before the valve of large aqueous medium throttling valve and little aqueous medium throttling valve the second pressure transmitter is arranged, large aqueous medium throttling valve and little aqueous medium throttling valve upper end are fixed with the magnetostriction type high accuracy displacement sensor, oil pressure servo ratio control valve group and large aqueous medium throttling valve be connected aqueous medium throttling valve and be connected, oil pressure servo ratio control valve group is driven by the control oil sources, all telescopic high accuracy displacement sensors, pressure transmitter all is electrically connected with electrical system, and oil pressure servo ratio control valve group is electrically connected with electrical system.
The motor-driven beam of described hydraulic pressure position is detected by telescopic high accuracy displacement sensor and is sent the signal that detects to electrical system, electrical system is processed the position signalling that detects and is obtained rate signal and set-point relatively and calculate Main cylinder high-pressure water inlet amount, Main cylinder advances the high pressure water yield by large aqueous medium throttling valve and the control of little aqueous medium throttling valve, the actual aperture degree of aqueous medium throttling valve is detected by the magnetostriction type high accuracy displacement sensor that is fixed on the aqueous medium throttling valve upper end, the magnetostriction type high accuracy displacement sensor passes to electrical system with the actual aperture degree of the aqueous medium throttling valve that detects, electrical system measures out the given opening degree of aqueous medium throttling valve by the Main cylinder high-pressure water inlet that calculates, the actual aperture degree of aqueous medium throttling valve and given opening degree compare and output signal to oil pressure servo ratio control valve group in electrical system, oil pressure servo ratio control valve group is regulated the actual aperture degree of aqueous medium throttling valve, and the adjusting by aqueous medium throttling valve, realize moving beam position, the accurate control of speed.
The upstream pressure that the working cylinder internal burden pressure that described the first pressure transmitter detects and the second pressure transmitter detect, pressure information passes to electrical system, electrical system calculates both differences (pressure differential), and according to pressure differential the opening degree of aqueous medium throttling valve is finely tuned, to improve control accuracy.
Described electrical system is that the PLC software program adds host computer, is also controlled position, the speed of the motor-driven beam of hydraulic pressure by the adjusting of aqueous medium throttling valve by PLC software program control aqueous medium throttling valve opening degree closed loop.
Described oil pressure servo ratio control valve group is driven by the control oil sources, and the control oil sources provides the constant voltage control source of 3um filtering accuracy;
The moving beam velocity interval of described large aqueous medium throttle valve control is 0～10mm/s, the control accuracy of realization is≤± 0.02mm/s; Little aqueous medium throttling valve control brake beam velocity interval is 0～5mm/s, the control accuracy of realization is≤± 0.005mm/s; Large aqueous medium throttling valve is mainly used in the large section bar production of extrusion speed excursion, and it is little that little aqueous medium throttling valve is mainly used in the velocity variations scope, but requires the higher highly difficult industry profile extruding of velocity control accuracy.
The advantage of patent of the present invention is: by choke valve opening degree position probing and control, and then the size of control working cylinder high-pressure water inlet amount, make position, the speed of beam realize that electrical system is PLC and host computer closed-loop control; Adopt large and small two aqueous medium throttling valves can adapt to no accuracy requirement, reach the high accuracy operation; Pressure transmitter is set can be detected the pressure before Main cylinder and the valve and by electrical system inflow be finely tuned, to improve control accuracy.
Description of drawings
Below in conjunction with the embodiment accompanying drawing patent of the present invention is described further:
Fig. 1 is this device embodiment schematic diagram.
Among the figure: 1, magnetostriction type high accuracy displacement sensor; 2, Main cylinder; 3, the motor-driven beam of hydraulic pressure; 4, the first pressure transmitter; 5, large aqueous medium throttling valve; 6, little aqueous medium throttling valve; 7, the second pressure transmitter; 8, oil pressure servo ratio control valve group; 9, control oil sources; 10, electrical system.
The specific embodiment
As shown in Figure 1, the motor-driven beam of hydraulic pressure is driven by Main cylinder, be fixed with the magnetostriction type high accuracy displacement sensor between the motor-driven beam of hydraulic pressure and the back rest, the position of the motor-driven beam 3 of hydraulic pressure is detected by magnetostriction type high accuracy displacement sensor 1, position detection signal is processed through the electrical system 10 that is electrically connected with magnetostriction type high accuracy displacement sensor 1 and is obtained rate signal, the position of the motor-driven beam 3 of hydraulic pressure and speed are the control targets, electrical system 10 will detect and process the position that obtains, rate signal and set-point are relatively and calculate Main cylinder high-pressure water inlet amount, Main cylinder and large aqueous medium throttling valve be connected aqueous medium throttling valve and be connected, electrical system 10 is regulated the opening degree of large aqueous medium throttling valve 5 or little aqueous medium throttling valve 6 by program, enter the Main cylinder 2 mesohigh water water yields thereby controlled, realize the moving beam position that working cylinder drives, speed control reaches accurate control according to different situations by the opening degree of the different aqueous medium throttling valves of electrical system 10 controls by large aqueous medium throttling valve 5 and little aqueous medium throttling valve 6 are set; Large aqueous medium throttling valve 5 and little aqueous medium throttling valve 6 upper ends are fixed with magnetostriction type high accuracy displacement sensor 1 and detect opening degree, the signal that detects is passed to the electrical system 10 that is electrically connected with magnetostriction type high accuracy displacement sensor 1, electrical system 10 compares actual aperture degree and the opening degree that setting high-pressure water inlet amount calculates, when comparative result is inconsistent, electrical system 10 by with large aqueous medium throttling valve be connected the oil pressure servo ratio control valve group 8 that aqueous medium throttling valve is connected and regulate actual aperture degree and the difference of setting opening degree, realize the closed-loop control of opening degree size, oil pressure servo ratio control valve group 8 is driven by control oil sources 9.
Be fixed with the first pressure transmitter on the Main cylinder, detect working cylinder internal burden pressure by the first pressure transmitter 4, before the valve of large aqueous medium throttling valve and little aqueous medium throttling valve the second pressure transmitter is arranged, detecting upstream pressure by the second pressure transmitter 7 also is that high pressure comes water pressure, the first pressure transmitter 4 and the pressure difference value (pressure reduction) by the second pressure transmitter 7 have also affected and have entered the working cylinder inner high voltage water yield, therefore the pressure signal transmission that the first pressure transmitter 4 and the second pressure transmitter 7 is detected is to the electrical system 10 that is electrically connected with it, electrical system 10 calculates pressure difference, according to pressure differential the opening degree of aqueous medium throttling valve is finely tuned, to improve velocity control accuracy, satisfied extrusion speed control and the moving beam Position Control of hydraulic forging press of water of compaction press; Realize the extrusion speed control of water of compaction press, can finish duralumin, superduralumin, copper-nickel alloy, phosphor bronze, titanium alloy extruding; Realize the Position Control of hydraulic forging press, can realize the control of forging ' s block dimension precision, reduce the machining cutting output.
Control oil sources 9 provides the constant voltage control source of 3um filtering accuracy for oil pressure servo ratio control valve group 8.
Input quantity: the hydraulic pressure that magnetostriction type high accuracy displacement sensor 1 detects motor-driven beam 3 positions and rate signal; The upstream pressure that the second pressure transmitter 7 detects; Main cylinder 2 internal pressures that the first pressure transmitter 4 detects.
Output quantity: the opening degree of large aqueous medium throttling valve 5 and little aqueous medium throttling valve 6; Oil pressure servo ratio control valve group 8; Control oil sources 9.
Large aqueous medium throttling valve 5 control brake beam velocity intervals are 0～10mm/s, the control accuracy of realization is≤± 0.02mm/s; Little aqueous medium throttling valve 6 control brake beam velocity intervals are 0～5mm/s, the control accuracy of realization is≤± 0.005mm/s.Large aqueous medium throttling valve 5 is mainly used in the large section bar production extruding of extrusion speed excursion, and it is little that little aqueous medium throttling valve 6 is mainly used in the velocity variations scope, but requires the higher highly difficult industry profile extruding of velocity control accuracy.
Exist under random impurity (less than the 0.2mm) condition at the industry water medium, water medium throttle valve speed regulation device can normally use.
Claims (1)
1. aqueous medium throttle valve speed regulation, it is characterized in that: the motor-driven beam of hydraulic pressure is driven by Main cylinder, be fixed with the magnetostriction type high accuracy displacement sensor between the motor-driven beam of hydraulic pressure and the back rest, Main cylinder and large aqueous medium throttling valve be connected aqueous medium throttling valve and be connected, be fixed with the first pressure transmitter on the Main cylinder, before the valve of large aqueous medium throttling valve and little aqueous medium throttling valve the second pressure transmitter is arranged, large aqueous medium throttling valve and little aqueous medium throttling valve upper end are fixed with the magnetostriction type high accuracy displacement sensor, oil pressure servo ratio control valve group and large aqueous medium throttling valve be connected aqueous medium throttling valve and be connected, oil pressure servo ratio control valve group is driven by the control oil sources, all telescopic high accuracy displacement sensors, pressure transmitter all is electrically connected with electrical system, and oil pressure servo ratio control valve group is electrically connected with electrical system; The motor-driven beam of described hydraulic pressure position is detected by telescopic high accuracy displacement sensor and is sent the signal that detects to electrical system, electrical system is processed the position signalling that detects and is obtained rate signal and set-point relatively and calculate Main cylinder high-pressure water inlet amount, Main cylinder advances the high pressure water yield by large aqueous medium throttling valve and the control of little aqueous medium throttling valve, the actual aperture degree of aqueous medium throttling valve is detected by the magnetostriction type high accuracy displacement sensor that is fixed on the aqueous medium throttling valve upper end, the magnetostriction type high accuracy displacement sensor passes to electrical system with the actual aperture degree of the aqueous medium throttling valve that detects, electrical system measures out the given opening degree of aqueous medium throttling valve by the Main cylinder high-pressure water inlet that calculates, the actual aperture degree of aqueous medium throttling valve and given opening degree compare and output signal to oil pressure servo ratio control valve group in electrical system, oil pressure servo ratio control valve group is regulated the actual aperture degree of aqueous medium throttling valve, and the adjusting by aqueous medium throttling valve, realize moving beam position, the accurate control of speed; The upstream pressure that the working cylinder internal burden pressure that described the first pressure transmitter detects and the second pressure transmitter detect, pressure information passes to electrical system, electrical system calculates both differences, and according to pressure differential the opening degree of aqueous medium throttling valve is finely tuned, to improve control accuracy; Described electrical system is that the PLC software program adds host computer, is also controlled position, the speed of the motor-driven beam of hydraulic pressure (3) by the adjusting of aqueous medium throttling valve by PLC software program control aqueous medium throttling valve opening degree closed loop; Described oil pressure servo ratio control valve group is driven by the control oil sources, and the control oil sources provides the constant voltage control source of 3um filtering accuracy; The moving beam velocity interval of described large aqueous medium throttle valve control is 0～10mm/s, the control accuracy of realization is≤± 0.02mm/s; Little aqueous medium throttling valve control brake beam velocity interval is 0～5mm/s, the control accuracy of realization is≤± 0.005mm/s; Large aqueous medium throttling valve is mainly used in the large section bar production of extrusion speed excursion, and it is little that little aqueous medium throttling valve is mainly used in the velocity variations scope, but requires the higher highly difficult industry profile extruding of velocity control accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010301028 CN101934598B (en) | 2010-02-01 | 2010-02-01 | Aqueous medium throttle valve speed regulation method |
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| CN 201010301028 CN101934598B (en) | 2010-02-01 | 2010-02-01 | Aqueous medium throttle valve speed regulation method |
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| CN101934598A CN101934598A (en) | 2011-01-05 |
| CN101934598B true CN101934598B (en) | 2013-04-24 |
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| CN 201010301028 Expired - Fee Related CN101934598B (en) | 2010-02-01 | 2010-02-01 | Aqueous medium throttle valve speed regulation method |
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| CN102777887B (en) * | 2012-07-24 | 2014-06-11 | 柳州高新区欧亚自动化设备有限责任公司 | Protection control device and protection control method for constant-differential-pressure electric adjusting valve for water-supply of boiler |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004368A (en) * | 2006-09-18 | 2007-07-25 | 张清臣 | Pressure compensation method, and parts of hydraulic press |
| CN101337257A (en) * | 2008-08-13 | 2009-01-07 | 中国第一重型机械集团公司 | Water press large-pressure instant load-missing control method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004368A (en) * | 2006-09-18 | 2007-07-25 | 张清臣 | Pressure compensation method, and parts of hydraulic press |
| CN101337257A (en) * | 2008-08-13 | 2009-01-07 | 中国第一重型机械集团公司 | Water press large-pressure instant load-missing control method |
Non-Patent Citations (1)
| Title |
|---|
| 谭建平等.挤压机节流调速系统的研究.《现代制造工程》.2009,(第2期),108-112. * |
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