CN100562827C - The electrical control gas pressure regulator that has flux measurement function - Google Patents

The electrical control gas pressure regulator that has flux measurement function Download PDF

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Publication number
CN100562827C
CN100562827C CNB2008101179297A CN200810117929A CN100562827C CN 100562827 C CN100562827 C CN 100562827C CN B2008101179297 A CNB2008101179297 A CN B2008101179297A CN 200810117929 A CN200810117929 A CN 200810117929A CN 100562827 C CN100562827 C CN 100562827C
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flow
pressure
nozzle
voice coil
coil motor
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CN101344791A (en
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王涛
胡艳萍
彭光正
香川利春
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Beijing Institute of Technology BIT
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Beijing Institute of Technology BIT
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Abstract

The present invention relates to a kind of pressure governor, particularly a kind of electrical control gas pressure regulator that has flux measurement function belongs to the automation field in the electromechanical integration.The present invention includes voice coil motor and drive baffle-type nozzle-flapper structure A, main valve B, flow measurement structure C and circuit control section D four parts.The electric setting signal of outside input is voltage or current signal, the pressure signal of setting signal and actual output enters circuit control section D simultaneously, after signal comparison, computing amplification, the voltage of its output or current signal output to the voice coil motor among the voice coil motor driving baffle-type nozzle-flapper structure A, thereby change the distance between nozzle and baffle plate, regulate the pressure of the control end of main valve B by the variation of the distance between nozzle and baffle plate.The control end articulamentum streaming flow-metering mechanism C of main valve B.The present invention has the function of quick pressure regulation of high precision and accurate bidirectional traffics measurement.

Description

The electrical control gas pressure regulator that has flux measurement function
Technical field
The present invention relates to a kind of pressure governor, particularly a kind of electrical control gas pressure regulator that has flux measurement function belongs to the automation field in the electromechanical integration.The flow of the control of export end turnover of accurate gaging pressure regulator when this regulator is used to realize quick electrical control adjustments of gas pressure.
Background technology
Pneumatic pressure regulator is the components and parts that are used in pneumatic transmission and the control system to regulate with stabilizing gas pressure.Be accompanied by developing rapidly of electronics and mechanical technique, the automatic flow Characteristics Detection of pneumatic element and rapid pressure are regulated need to have electric stepless control, pressure governor that big relief function, turnover bidirectional traffics are measured function fast.
The method of the pressure flow characteristics auto of current measurement pneumatic pressure-release valve mainly is with reference to international standard (IS06953-2:2000:Pneumatic fluid power.Compressed air pressureregulators and filter-regulators.Test methods to determine the maincharacteristics to be included in literature from suppliers.Pneumatic pressure-release valve and filtering pressure reducing valve. part 2: the method for testing of the key property that should comprise in the evaluation business document, 2000) and national standard (JB/T7376-1994 (reexamination in 2005): pneumatic air reduction valve technical conditions), utilize two cover proving installations and test loop to measure respectively the discharge characteristic of the discharge characteristic of forward flow state and overflow situation.When measuring the discharge characteristic of forward flow state, pressurized air is through the air supply opening and the control mouth of tested reduction valve, flow through variable restrictor device and flowmeter row to atmosphere, measure corresponding tested reduction valve control end pressure drafting positive pressure-rating curve simultaneously thereby set load flow by the size of regulating tested reduction valve control end flow controller; When measuring the discharge characteristic of overflow flow state, pressurized air flows through behind the control mouth that flowmeter enters tested reduction valve from overflow vent row to atmosphere through setting at the pressure of tested reduction valve control side setting with the air supply opening of reduction valve and control mouth, thereby measures corresponding tested reduction valve control end flow drafting overflow simultaneously to the pressure-flow family curve by regulating the pressure that control side reduction valve sets.The test loop complexity is difficult for realizing the robotization of test, and testing efficiency is low, and specific air consumption is big.Present a kind of testing efficiency height, the method for testing that specific air consumption is few are suggested (continuously every the method for measuring the pneumatic pressure-release valve discharge characteristic, the patent number of accepting: 200810057091.7).Promptly connect one successively and have flowmeter that bidirectional traffics measure and one and have the pressure-regulating valve that big overflow does not have the conversion dead band, be pressed onto from atmosphere by the set pressure variable valve and change the pressure-flow characteristic that can record tested valve continuously in the supply pressure scope at the control end of tested reduction valve.Therefore the exploitation that has an electrical control pneumatic pressure regulator of flow bidirectional measurement function at control end helps further popularizing this method.
In addition, the response of setting for raising pressure in the pneumatic servo system, as control device, utilizing electricity/atmospheric pressure operation valve to carry out the pressure controlled while, the flow signal that flows into out controlling object joins the response performance that can effectively improve system in the control system.Carrying out pressure regulating mechanism and flow-metering mechanism compound is the effective means that realizes pressure controlled accuracy and rapidity.
There is following shortcoming in traditional electrical control pressure governor:
1) the PWM control forms of electric many employings of driving mechanism power (moment) motor or high-speed switch valve, power (moment) motor exist that power consumption is big, low-response, the relatively large shortcoming of volume, are difficult to realize high response requirements of saving energy; The PWM control forms of high-speed switch valve can produce certain output pressure pulsation.
2) gas flow from the pressure governor inflow and outflow generally is to measure with the external flow meter, and integrating the mechanism that can carry out two-way quick measurement under pressure-bearing with pressure governor does not also have.
3) can gather the electric signal of pressure transducer and the signal of flow, algorithm computation, the circuit controller that voice coil motor is driven lacks.
Pneumatic pressure regulator is the components and parts that are used in pneumatic transmission and the control system to regulate with stabilizing gas pressure.Be accompanied by developing rapidly of electronics and mechanical technique, the automatic flow Characteristics Detection of pneumatic element and rapid pressure are regulated need to have electric stepless control, pressure governor that big relief function, turnover bidirectional traffics are measured function fast.
Summary of the invention
The technical problem to be solved in the present invention is the shortcoming that exists at existing electrical control pressure governor, and a kind of electrical control gas pressure regulator that has flux measurement function is provided.
For solving the problems of the technologies described above, the present invention takes following means:
1) voice coil motor driving baffle-type nozzle-flapper structure A comprises voice coil motor mover, voice coil motor stator, baffle plate, nozzle.The output shaft of voice coil motor mover is connected with baffle plate, baffle plate be positioned at nozzle directly over, the power that coil in the voice coil motor and the action of a magnetic field produce is converted to the output quantity on the output shaft that is connected on the voice coil motor mover, this output quantity drives the to-and-fro movement that the baffle plate that is connected on the output shaft is made straight line, distance between baffle plate and the nozzle can change to maximal value from zero, regulates the pressure of the control end of main valve B by the variation of the distance between nozzle and baffle plate;
2) flow-metering mechanism C comprises laminar flow formula stream element and differential pressure pick-up, laminar flow formula stream element adopts many very thin steel pipe parallel connections to constitute a laminar flow formula flow-metering mechanism, measure the pressure differential at the very thin pipe of laminar flow two ends by differential pressure pick-up, obtain the flow that flows into or flow out from the control end of pressure governor according to formula Q=k Δ P, can realize the measurement of bidirectional traffics, the flow measurement structure C is connected the control end of main valve B;
3) the electric setting signal of outside input is voltage or current signal, the pressure signal of setting signal and actual output enters circuit control section D simultaneously, after signal comparison, computing amplification, the voltage of its output or current signal output to the voice coil motor among the voice coil motor driving baffle-type nozzle-flapper structure A, thereby change the distance between nozzle and baffle plate.
Adopt said structure, the flow of accurate gaging pressure control end when the present invention realizes that pressure is regulated in quick electrical control, pressure governor and fast the novel control element of bidirectional traffics measuring sensor be combined in the design of servo-drive system and control, can provide the function that has high precision pressure regulation and flow measurement simultaneously.
Technical scheme of the present invention is implemented as follows:
A kind of electrical control gas pressure regulator that has flux measurement function of the present invention, as shown in Figure 1, it comprises that voice coil motor drives baffle-type nozzle-flapper structure A, main valve B, flow measurement structure C and circuit control section D.
Pressure is regulated flow process as shown in Figure 2.It is voltage or current signal that electric setting signal is imported in the outside that has an electrical control gas pressure regulator of flux measurement function, signal enters the circuit controller of circuit control section D, the circuit control section comprises circuit controller and pressure transducer, pressure transducer is arranged on the control end of main valve B, the output signal of pressure transducer enters one and has the microprocessor circuit controller, after in having the microprocessor circuit controller, the pressure signal of reality output and the signal by external setting-up being compared, utilizing the mathematics control algolithm to carry out computing in having the microprocessor circuit controller amplifies, its result (voltage or electric current) outputs to the voice coil motor among the voice coil motor driving baffle-type nozzle-flapper structure A, voice coil motor drives baffle-type nozzle-flapper structure A and comprises the voice coil motor mover, the voice coil motor stator, baffle plate, nozzle, the output shaft of voice coil motor mover is connected with baffle plate, baffle plate be positioned at nozzle directly over, to maximal value, the maximal value of distance is to decide according to the ultimate range that the voice coil motor mover moves to distance between baffle plate and the nozzle between baffle plate and the nozzle from zero.Its principle of work is according to Amp, and electrical conductor is placed in the magnetic field, will produce power, and the size of power depends on magnetic field power, input current and magnetic field and sense of current.When the input of curtage signal is arranged, the power that coil in the voice coil motor and the action of a magnetic field produce is converted to the output quantity that is connected output shaft on the voice coil motor mover, this output quantity drives the to-and-fro movement that the baffle plate that is connected on the output shaft is made straight line, thereby changes the distance between nozzle and baffle plate.
Regulate the pressure of the control end of main valve B by the variation of the distance between nozzle and baffle plate.Main valve B comprises main valve piston, overflow lift valve spring, positive flow lift valve spring, overflow lift valve valve pocket, positive flow lift valve valve pocket, overflow poppet valve seat, positive flow poppet valve seat, main valve mandrel and adjustable flow bean.Its pressure Principles of Regulation are: pressurized air is discharged in the atmosphere through the slit that forms between nozzle and baffle plate after entering behind the entrance point of main valve B and entering the back pressure cavity of nozzle lower end by the adjustable flow bean in the branch road.Because the change in displacement of baffle plate changes the distance between nozzle and baffle plate, thereby the pressure of nozzle lower end back pressure cavity is produced, this pressure acts on the upper surface of piston in the main valve structure, during the power of the upwards effect that is produced greater than forward lift valve spring when the power that acts on piston upper surface, by axially down mobile of main valve plug, opening is opened between positive flow lift valve valve pocket and the positive flow poppet valve seat, and the outlet that pressurized air flows to main valve B produces controlled pressure; When top hole pressure during less than set pressure, have the microprocessor circuit controller and regulate the control signal of exporting to voice coil motor, baffle plate is moved down reduce the distance between nozzle and baffle plate, thereby increase the pressure of back pressure cavity, main valve piston moves down, opening strengthens between positive flow lift valve valve pocket and the positive flow poppet valve seat, flows through the increase of endpiece flow and makes the top hole pressure rising reach set pressure again; When top hole pressure during greater than set pressure, thereby having the microprocessor circuit controller regulates the control signal export to voice coil motor and makes and move the pressure that the distance that increases between nozzle and baffle plate reduces back pressure cavity on the baffle plate, move on the piston, move by the main valve mandrel, the opening aperture reduces until closing between back overflow lift valve valve pocket and the overflow poppet valve seat opening and opens between positive flow lift valve valve pocket and the positive flow poppet valve seat, exit pressurized air is from the rapid exhaust of opening between overflow lift valve valve pocket and the overflow poppet valve seat, realize overflow, outlet pressure is fallen reach set pressure again.Because main valve B is the hoisting type structure, air inlet and exhaust are the symmetry structure, can realize the big flow of positive flow and overflow and not have the conversion dead band.
The measurement function of the turnover flow of main valve B control end realizes by flow-metering mechanism C.Flow-metering mechanism C comprises laminar flow formula stream element and differential pressure pick-up, laminar flow formula stream element adopts many very thin steel pipe parallel connections to constitute a laminar flow formula flow-metering mechanism, be connected the control end of main valve B, measure the pressure differential at the very thin pipe of laminar flow two ends by differential pressure pick-up, according to formula Q=k Δ P, wherein Q is a volumetric flow of gas; Δ P is a differential pressure; K is a conversion coefficient, obtains the flow that flows into or flow out from the control end of pressure governor, can realize the measurement of bidirectional traffics.
Owing to adopted technique scheme, the present invention to have following advantage and effect, the invention provides have a big overflow and can realize regulating pressure fast, have the pressure transducer feedback function, make pressure regulate accurate pressure regulator more.Simultaneously carry out the new-type element that bidirectional traffics are measured function not needing to add separately under the situation of flowmeter, this element provides the function that has high precision pressure regulation and flow measurement simultaneously.When being applied in the pressure-flow characteristic test test of pneumatic pressure-release valve, can simplify proving installation, shorten the test duration, improve measuring accuracy, economize on tolerance; When being applied in the pressure servo control system,, be easy to realize rapidity and the stability controlled by the tandem control of flow feedback.
Description of drawings
Fig. 1 is the electrical control gas pressure regulator structural scheme of mechanism that has flux measurement function;
Fig. 2 is the electrical control gas pressure regulator principle of work block diagram that has flux measurement function;
Among the figure: the A-voice coil motor drives the baffle-type nozzle-flapper structure, the B-main valve, the C-flow-metering mechanism, D-circuit control section, 1-voice coil motor mover, 2-voice coil motor stator, the 3-baffle plate, the 4-nozzle, the 5-main valve piston, the 6-back pressure cavity, 7-overflow lift valve spring, 8-positive flow lift valve spring, 9-overflow lift valve valve pocket, 10-positive flow lift valve valve pocket, 11-overflow poppet valve seat, 12-forward poppet valve seat, 13-main valve mandrel, 14-laminar flow formula stream element, the 15-pressure transducer, the 16-differential pressure pick-up, 17-band microprocessor circuit controller, the 18-adjustable flow bean.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, as embodiment, it is as follows that the present invention has in the electrical control gas pressure regulator of flux measurement function primary structure and working method.
It is voltage or current signal that electric setting signal is imported in the outside that has an electrical control gas pressure regulator of flux measurement function, the input setting signal of 1~5V enters the band microprocessor circuit controller 17 of circuit control section D in the pressure governor, circuit control section D comprises band microprocessor circuit controller 17 and pressure transducer 15, pressure transducer 15 is arranged on the control end of main valve B, its measurement range is 0~1MPa, and output signal is 1~5V.The output signal of pressure transducer 15 enters an electronic circuit controller 17 that has microprocessor, after in having microprocessor circuit controller 17, the pressure signal of reality output and the signal by external setting-up being compared, utilizing the mathematics control algolithm to carry out computing at circuit controller amplifies, its result (voltage or electric current) outputs to the voice coil motor among the voice coil motor driving baffle-type nozzle-flapper structure A, voice coil motor drives baffle-type nozzle-flapper structure A and comprises voice coil motor mover 1, voice coil motor stator 2, baffle plate 3, nozzle 4, the output shaft of voice coil motor mover 1 is connected with baffle plate 3, baffle plate 3 be positioned at nozzle 4 directly over, nozzle 4 diameters are 1mm.To maximal value, the maximal value of distance is to decide according to the ultimate range that the voice coil motor mover moves to distance between baffle plate 3 and the nozzle 4 between baffle plate 3 and the nozzle 4 from zero.Its principle of work is according to Amp, and electrical conductor is placed in the magnetic field, will produce power, and the size of power depends on magnetic field power, electric current and magnetic field and sense of current.When the input of curtage signal is arranged, thereby the power that coil in the voice coil motor and the action of a magnetic field produce is converted to the output quantity that is connected the axle on the voice coil loudspeaker voice coil mover 1 and drives the to-and-fro movement that the baffle plate 3 that is connected on the axle is made straight line, and the distance that nozzle 4 and baffle plate are 3 changes from 0 to 2mm.
The pressure of the control end of main valve B is regulated in the variation of the distance by 3 on nozzle 4 and baffle plate.Main valve B comprises main valve piston 5, overflow lift valve spring 7, positive flow lift valve spring 8, overflow lift valve valve pocket 9, positive flow lift valve valve pocket 10, overflow poppet valve seat 11, positive flow poppet valve seat 12, main valve mandrel 13 and adjustable flow bean 18.Its pressure Principles of Regulation are: it is that the adjustable flow bean 18 of 1mm enters that the slit through nozzle 4 and 3 formation of baffle plate is discharged in the atmosphere after the back pressure cavity 6 of nozzle 4 lower ends that pressurized air enters behind the entrance point of main valve B by the diameter in the branch road.Since the distance that the change in displacement of baffle plate 3 change nozzle 4 and baffle plate are 3, thus the pressure of nozzle 4 lower end back pressure cavity 6 is produced, this pressure acts on the upper surface of main valve piston 5 in the main valve structure, and the diameter of main valve piston 5 is 25mm.When the power that acts on piston 5 upper surfaces is the power of the upwards effect that produced of the positive flow lift valve spring 8 of 100N/m greater than elasticity coefficient, by 13 downward the moving of main valve mandrel, opening is opened between positive flow lift valve valve pocket 10 and the positive flow poppet valve seat 12, positive flow poppet valve seat diameter is 10mm, and the maximum open distance is 5mm.The outlet that pressurized air flows to pressure governor produces controlled pressure; When top hole pressure during less than set pressure, thereby have microprocessor circuit controller 17 and regulate the pressure that the control signal of exporting to voice coil motor moves down baffle plate 3 to reduce nozzle 4 and the distance increase back pressure cavity 6 of 3 on baffle plate, main valve piston 5 moves down, opening strengthens between positive flow lift valve valve pocket 10 and the positive flow poppet valve seat 12, flows through the increase of endpiece flow and makes the top hole pressure rising reach set pressure again; When top hole pressure during greater than set pressure, thereby having microprocessor circuit controller 17 regulates the control signal of exporting to voice coil motor and makes and move the pressure that the distance that increases 3 on nozzle 4 and baffle plate reduces back pressure cavity 6 on the baffle plate 3, move on the main valve piston 5, move by main valve mandrel 13, the opening aperture reduces until closing between back overflow lift valve valve pocket 9 and the overflow poppet valve seat 11 opening and opens between positive flow lift valve valve pocket 10 and the positive flow poppet valve seat 12, exit pressurized air is from the rapid exhaust of opening between overflow lift valve valve pocket 9 and the overflow poppet valve seat 11, realize overflow, outlet pressure is fallen reach set pressure again.Because main valve B is the hoisting type structure, air inlet and exhaust are the symmetry structure, can realize the big flow of positive flow and overflow and not have the conversion dead band.
The measurement function of the turnover flow of the control end of main valve B realizes by flow-metering mechanism C.Flow-metering mechanism C comprises laminar flow formula stream element 14 and differential pressure pick-up 16, and the measurement range of differential pressure pick-up 16 is-500~500kPa that output signal is 0.5~4.5V.Laminar flow formula stream element 14 adopts many very thin steel pipe parallel connections to constitute a laminar flow formula flow-metering mechanism, be connected the control end of main valve B, by the pressure differential at differential pressure pick-up 16 measurement laminar flow formula stream elements 14 two ends, according to formula Q=k Δ P, wherein Q is a volumetric flow of gas; Δ P is a differential pressure; K is a conversion coefficient, obtains the flow that flows into or flow out from the control end of pressure governor, and the scope of flow is-500~500NL/min, thereby can realize the measurement of bidirectional traffics.

Claims (2)

1, a kind of electrical control gas pressure regulator that has flux measurement function comprises that voice coil motor drives baffle-type nozzle-flapper structure A, main valve B, flow-metering mechanism C and circuit control section D four parts, is characterized in that:
Voice coil motor drives baffle-type nozzle-flapper structure A and comprises voice coil motor mover (1), voice coil motor stator (2), baffle plate (3), nozzle (4); The output shaft of voice coil motor mover (1) is connected with baffle plate (3), baffle plate (3) be positioned at nozzle (4) directly over, the power that coil in the voice coil motor and the action of a magnetic field produce is converted to the output quantity on the output shaft that is connected on the voice coil motor mover (1), this output quantity drives the to-and-fro movement that the baffle plate (3) that is connected on the output shaft is made straight line, distance between baffle plate (3) and the nozzle (4) can change to maximal value from zero, regulates the pressure of the control end of main valve B by the variation of the distance between nozzle (4) and baffle plate (3);
Main valve B comprises main valve piston, overflow lift valve spring, positive flow lift valve spring, overflow lift valve valve pocket, positive flow lift valve valve pocket, overflow poppet valve seat, positive flow poppet valve seat, main valve mandrel and adjustable flow bean, and pressurized air is discharged in the atmosphere through the slit that forms between nozzle and baffle plate after entering behind the entrance point of main valve B and entering the back pressure cavity of nozzle lower end by the adjustable flow bean in the branch road;
Flow-metering mechanism C comprises laminar flow formula stream element (14) and differential pressure pick-up (16), laminar flow formula stream element (14) adopts many very thin steel pipe parallel connections to constitute a laminar flow formula flow-metering mechanism, be connected the control end of main valve B, measure the pressure differential at many very thin steel pipe two ends by differential pressure pick-up (16), obtain the flow that flows into or flow out from the control end of main valve B according to formula Q=k Δ P, can realize the measurement of bidirectional traffics, Q wherein: volumetric flow of gas, k: conversion coefficient, Δ P: the pressure differential at many very thin steel pipe two ends, flow-metering mechanism C is connected the control end of main valve B;
The electric setting signal of outside input is voltage or current signal, the outside electric setting signal of input and enter circuit control section D simultaneously by the output signal that the pressure transducer (15) of the control end that is arranged on main valve B records, after signal comparison, computing amplification, the voltage of circuit control section D output or current signal output to the voice coil motor among the voice coil motor driving baffle-type nozzle-flapper structure A, thereby change the distance between nozzle (4) and baffle plate (3).
2, a kind of electrical control gas pressure regulator that has flux measurement function as claimed in claim 1 is characterized in that: the maximal value of distance is to decide according to the ultimate range that the voice coil motor mover moves between baffle plate (3) and the nozzle (4).
CNB2008101179297A 2008-08-15 2008-08-15 The electrical control gas pressure regulator that has flux measurement function Expired - Fee Related CN100562827C (en)

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CN101819052B (en) * 2010-04-21 2013-02-27 无锡求信流量仪表有限公司 Flow transmitter provided with double differential pressure sensors and pressure difference measurement method
CN108412922B (en) * 2018-05-07 2019-11-15 西安航空制动科技有限公司 A kind of airplane hydraulic pressure brake system pressure regulator
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