CN105300685B - A kind of regulating valve viscosity property analyzes experimental provision - Google Patents
A kind of regulating valve viscosity property analyzes experimental provision Download PDFInfo
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- CN105300685B CN105300685B CN201510890316.7A CN201510890316A CN105300685B CN 105300685 B CN105300685 B CN 105300685B CN 201510890316 A CN201510890316 A CN 201510890316A CN 105300685 B CN105300685 B CN 105300685B
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Abstract
The present invention provides a kind of regulating valve viscosity property analysis experimental provision, is mainly made up of regulating valve, frictional force analog component, controller, process object, rate-of-change sensor and data acquisition unit.Frictional force analog component is adjustable to produce different size of frictional force kinetic characteristic, and its dynamic friction block included is connected by a rigid connector and the valve rod of regulating valve, on outer friction power superposition and valve rod, so that the viscosity property of analog regulation valve.Positive pressure value suffered by controller output signal, valve position signal, process variable value and dynamic friction block in the present invention is all acquired by data acquisition unit and stored, and the detection method and control compensation methods of regulating valve viscosity property can be studied based on these data.
Description
Technical field
It is viscous in particular to a kind of regulating valve the present invention relates to a kind of process control equipment specificity analysis experiment porch
Specificity analysis experimental provision.
Background technology
Regulating valve is the most commonly used a kind of actuator in industrial process, often occur in use dead band, it is viscous, return
The failures such as stagnant, saturation.Dead band and saturated characteristic are easy to detection, as long as probability of type selecting rationally its appearance is not high in practice.It is viscous
Characteristic is most commonly seen, and the influence degree to control loop varies, and its detection means is complicated.At use initial stage of regulating valve,
Frictional force between valve rod and seal member inputs to the control signal and valve actual bit of valve within zone of reasonableness
A kind of linear relationship is kept between putting.But elapse over time, the lubrication decay of seal member, along with the erosion of external environment condition
The increase of stem surface frictional force is likely to result in, these phenomenons cause valve viscosity property occur.There is the regulating valve of viscosity property
Control loop hydraulic performance decline where it can be made, causes process variable to vibrate, and finally influences product quality, the increase of whole production line
The consumption of product disqualification rate and the energy.In modern plant, generally there are hundreds and thousands of regulating valves in operation, by people
Power goes to detect each regulating valve and maintenance is a very hard work.Thus, utilization can obtain process data, base
The detection and compensation for studying valve viscous characteristic in data-driven method are always an important content of process control circle.Research
Viscosity property is the various operational datas of control loop under acquisition viscous state on the premise that control loop influences.At present, obtain
A kind of method of data is the data for gathering actual industrial scene, and its deficiency is that the data obtained is uncontrollable and most needs are further
Processing.Second method is to be at viscous state, but this method meeting by changing the installation moment of torsion of regulation valve seal
Valve is caused damage, and can not be controllable output different size viscous state under operational data.
The content of the invention
The present invention provides a kind of regulating valve viscosity property analysis experimental provision, by installing an external friction in regulating valve
Power analog component, the friction characteristics that simulation valve rod is subject to, to produce different valve viscous states.The device continuously adjustable
Viscous grade, and do not change valve body structure.The device also includes controller and data collecting system, can produce to valve
Control signal, and record can be acquired to valve input signal, position signalling, frictional force size and various processes variable.
Research in terms of the diagnosis of valve viscosity property and control compensation can be adjusted using the device as experiment porch.
A kind of regulating valve viscosity property that the present invention is provided analyzes experimental provision by regulating valve, frictional force analog component, number
According to collector, controller, sensor and the several part compositions of process object.Regulating valve is motor-driven valve or pneumatic operated valve, and it is performed
Device carries valve position signal output function, and this signal sends data acquisition unit in a wired or wireless fashion.Frictional force analog component
It is a frictional force generating means, its rigid connector is connected with the connector on regulating valve rod, changes dynamic friction on device
The size of normal pressure suffered by block, is applied to force characteristic on valve rod also respective change accordingly.The output signal conduct of controller
Valve input signal, and be sent to simultaneously in data acquisition unit.Controller can be all-purpose computer (PC), single-chip microcomputer, can compile
Times of journey logic controller (PLC), application specific integrated circuit (ASIC), PLD (PLD) or some discrete components etc.
Meaning combination, can send the output signal of controller and changes by changing internal processes.Regulating valve connection procedure object, one
In exemplary application, process object can be the liquid level of pipeline flow or a container.Rate-of-change sensor is used for process object
Process values are measured, and measured value is input in controller and data acquisition unit simultaneously.
Frictional force analog component in a kind of regulating valve viscosity property analysis experimental provision that the present invention is provided is by slidably
Dynamic friction block portion point and pressure regulating part be grouped into.Dynamic friction block portion point include dynamic friction block, coaxial connector, sliding axle,
Rigid connector, bearing, pulley, draught line and gravity compensation part.Dynamic friction block two ends pass through coaxial connector and slip respectively
Axle is connected, sliding axle and bearing connection.Dynamic friction block kinetic characteristic is influenceed by sliding axle and friction between bearings and journals power, the choosing of bearing
Selecting should be defined by reducing the force of sliding friction between them as far as possible.Draught line connects sliding axle and gravity respectively by one group of pulley
Compensating part, in dynamic friction block right angle setting, the quality of reasonable selection gravity compensation part can be to the gravity of the generations such as dynamic friction block
Compensate, when dynamic friction block is horizontally mounted without connecting draught line.Rigid connector one end connects the connector of regulating valve,
The other end is provided with mounting hole, is firmly secured to fixed screw on dynamic friction block.
Pressure regulating part point in a kind of regulating valve viscosity property analysis experimental provision that the present invention is provided is used to change quiet
The normal pressure that brake pad is put on dynamic friction block, is mainly fixed including adjusting knob, accurate lead screw, accurate nut, anti-displacement
Part, flexible member, static friction block, pressure sensor, static friction block fixture, clamping screw, fix bar and support.Accurate nut
Rack-mount, it is fixed for whole device, rotates adjusting knob and drives accurate lead screw rotation, passes through essence
Rotary motion is transformed to linear motion after close nut, and conduct on supreme pressure piece, so that pressuring elastic element is deformed, then enter
The conduction of one step produces the pressure to pressure sensor；Two face shapes of static friction block fixture be in " recessed " shape, side it is recessed
Pressure sensor is installed, the groove of opposite side is used to install static friction block, and the effect of clamping screw is fixed static friction block in groove,
It is set not produce the displacement on dynamic friction block moving direction；Connected between static friction block fixture and support by fix bar, Gu
Fixed pole quantity is many, and fix bar side can be slided in the bracket；With the rotation of adjusting knob, put on static friction block
Pressure also changes therewith, and pressure sensor institute measured value is the positive pressure value that static friction block is applied on dynamic friction block.
It is used as the further improvement of such scheme：
The frictional force analog component is grouped into by dynamic friction block movable part and static friction block pressure regulating part, dynamic friction
Rigid connector is fixed with block, the other end of rigid connector is coupled on the valve rod of regulating valve, and stem movement makes to rub
Cleaning block is moved in the same direction, and static friction block is adjustable to the normal pressure of dynamic friction block, and the power is put on the side of dynamic friction block, static friction
The gravity of block is not applied on dynamic friction block.
Dynamic friction block movable part in frictional force analog component by dynamic friction block, rigid connector, coupling, coaxially connect
Device, sliding axle, bearing, test splice, draught line, pulley and gravity compensation part is connect to constitute.
Static friction block pressure regulating part point in frictional force analog component is by adjusting knob, accurate lead screw, accurate nut, anti-
Displacement fixture, support, upper pressure piece, flexible member, pressure sensor, static friction block fixture, clamping screw and quiet rub
Cleaning block is constituted.
Gravity compensation part is connected by pulley and test splice, can offset dynamic friction block it is vertically-mounted when itself and its
The gravity of related fittings.
Regulating valve rod and dynamic friction block after rigid connector connection are synchronized with the movement, parallel to each other, and between the two not
There is dead band and deformation.
Rotary motion is changed into linear running by the static friction block pressure regulating part point in frictional force analog component, then is passed through
Power is transmitted to above dynamic friction block by one flexible member.
The silking of accurate lead screw and accurate nut is very thin, and highly uniform.The elastic force scope of flexible member is completely in experiment
Within the scope of the correspondence of required regulating valve rod friction.Static friction block install after will not dynamic friction block motion
Displacement is produced on direction.
The method have the benefit that：
A kind of regulating valve viscosity property provided by the present invention analyzes experimental provision when in use by dynamic friction block and tune
The parallel installation of valve valve rod is saved, by the rigid connector on the connector and dynamic friction block of a coupling connecting valve, works as regulation
During the stem movement of valve, dynamic friction block also does identical motion therewith.When adjusting knob is in certain position, static friction block is applied
Being added in the normal pressure of dynamic friction block can be obtained by pressure sensor detection, and the material further according to dynamic friction block and static friction block is special
Property, it would know that its coefficient of sliding friction and coefficient of maximum static friction (can also be measured by friction testing instrument), therefore dynamic friction
Known to the frictional force kinetic characteristic of block.According to the superposition theorem of power, this friction characteristics is equally applied to the valve rod of regulating valve
On, thus kinetic characteristic when can simulate valve viscous.
Brief description of the drawings
Fig. 1 is agent structure schematic diagram of the present invention.
Fig. 2 is the frictional force analog component structure chart of the present invention.
【Reference numeral explanation】1. push rod；2. connector；3. valve rod；4. gland；5. set screw；6. seal；7. valve
Core；8. dynamic friction block；9. static friction block；10. coaxial connector；11. bearing；12. sliding axle；13. fixed screw；14. rigidity
Connector；15. pressure sensor；16. flexible member；17. accurate lead screw；18. adjusting knob；19. anti-displacement fixture；20.
Static friction block fixture；21. fix bar；22. pulley；23. draught line；24. gravity compensation part；25. accurate nut；26. support；
27. on pressure piece；28. clamping screw；29. coupling；30. test splice.
Embodiment
In order to which the technical characteristic to the present invention, purpose and methods for using them are more clearly understood from, in conjunction with accompanying drawing to this
The embodiment of invention is described further.
As shown in figure 1, a kind of core of regulating valve viscosity property analysis experimental provision provided by the present invention is regulating valve
102 and frictional force analog component 104, in addition also include controller 101, process object 103, the sum of rate-of-change sensor 106
According to collector 105.Frictional force analog component 104 is connected in regulating valve 102, by regulation regulating valve 102 can be made to be operated in not
Under same viscous state；Regulating valve 102 is also connected with frictional force analog component 104 with data acquisition unit 105, so as to recording valve
Position signal and positive pressure value；The input side of regulating valve 102 connects controller 101, can be by changing the internal processes of controller 101
Different control signals are produced, for testing regulating valve 101, control signal is also gathered in real time by data acquisition unit 105 simultaneously；Cross
Journey object 103 is connected to the outlet side of regulating valve 102, and it is to be used to analyze 102 pairs of mistakes of regulating valve under different viscosity properties that it, which is acted on,
Cheng Bianliang influence, the value of process variable is measured by rate-of-change sensor 106, while giving data acquisition unit 105 and control
Device 101.
A kind of regulating valve viscosity property provided by the present invention analyzes frictional force analog component such as Fig. 2 institutes of experimental provision
Show.During work, dynamic friction block 8 and static friction block 9 are in close contact, and static friction block 9 can be passed to the normal pressure of dynamic friction block 8 by pressure
Sensor 15 is detected；The two ends of dynamic friction block 8 are connected by coaxial connector 10 and sliding axle 12 respectively, and sliding axle 12 is provided at both ends with
Test splice 30；Two sliding axles 12 are separately mounted on bearing 11, and frictional force when sliding axle 12 is slided in bearing 11 is very
It is small；Dynamic friction block 8 is also connected by fixed screw 13 and rigid connector 14, the other end connection coupling of rigid connector 14
29, coupling 29 is arranged on the connector 2 of regulating valve, and connector 2 is connected with valve rod 3 again, and dynamic rub is driven when valve rod 3 is moved
Cleaning block 8 is moved, and the frictional force suffered by dynamic friction block 8 is similarly put on valve rod 3；The installation direction of dynamic friction block 8 will be with
Valve rod 3 is parallel, and it can be vertical direction or horizontal direction, during vertical direction, dynamic friction block 8, coaxial connector 10, sliding axle
12nd, the gravity of fixed screw 13, rigid connector 14 and coupling 29 is offset by gravity compensation part 24, gravity compensation
Part 24 is to be connected to by draught line 23 and pulley 22 on measuring head 30；When dynamic friction block 8 is horizontally mounted, the He of draught line 23
Gravity compensation part 24 is without installing.
It is adjusted, is adjusted by adjusting knob 18 as shown in Fig. 2 static friction block 9 is applied to normal pressure on dynamic friction block 8
Knob 18 connects accurate lead screw 17, and accurate lead screw 17 is installed in the accurate nut 25 being fixed on support 26, rotates regulation rotation
Button 18, the convert rotational motion of accurate lead screw 17 is linear motion, so as to promote pressure piece 27 to move, upper pressure piece 27 is another
Side connects flexible member 16, and the opposite side connection pressure sensor 15 of flexible member 16, the upper linear motion of pressure piece 27 makes elasticity
Element 16 is deformed upon, so as to produce elastic force, this power is similarly applied on pressure sensor 15；Adjusting knob 18 is adjusted in place
After can be further fixed with anti-displacement fixture 19, to prevent accurate lead screw 17 to fluctuate；Pressure sensor 15 rubs with quiet again
Cleaning block fixture 20 is connected, and static friction block fixture 20 is connected with static friction block 9 again, and the elastic force produced by flexible member 16 is final
Put on static friction block 9, then pass to the normal pressure produced to dynamic friction block 8；Static friction block 9 is by the jail of clamping screw 28
Admittedly being fixed among static friction block fixture 20, it will not be subjected to displacement when dynamic friction block 8 is moved；Static friction block fixture
20 are also connected by fix bar 21 and support 26, and fix bar 21 can be slided in the mounting hole of support 26, and different directions, which are rotated, to be adjusted
Section knob 18 can make static friction block fixture 20 closer or far from dynamic friction block 8, be rubbed so as to increase or reduce 9 pairs of static friction block and move
The normal pressure of cleaning block 8.
As shown in Fig. 2 the surface of the static friction block 9 and dynamic friction block 8 in the above-mentioned frictional force analog component that rubs has necessarily
The roughness of grade, can simulate the different frictional force dynamic characteristics of generation by changing the brake pad of different roughness grade,
In the example embodiment of the present invention, static friction block 9 may be selected and the identical Facing material of valve sealing element 6, dynamic friction block 8
It may be selected and the identical Facing material of valve rod 3.
In the example embodiment of the present invention, the optional linear bearing of bearing 11, the cunning between sliding axle 12 and bearing 11
Kinetic force of friction very little, it is negligible relative to frictional force between dynamic friction block 8 and static friction block 9, and this power also can be by finely tuning gravity
The quality of compensating part 24 is compensated.
In the example embodiment of the present invention, frictional force analog component can be as an integral installation in regulating valve
On support, it now should carefully adjust installation site to ensure dynamic friction block 8 and valve rod 3 operationally perfect parallelism.
In the example embodiment of the present invention, the gland 4 of regulating valve can be recognized under the suitable adjustable of set screw 5
It is stable for the friction characteristics of valve rod 3 and seal 6；For the regulating valve newly dispatched from the factory, valve input signal and valve are defaulted as
Displacement keeps linear relationship；For used old regulating valve, after frictional force analog component is installed, static friction block is adjusted
The normal pressure of 9 pairs of dynamic friction blocks 8 is zero, then the external friction testing instrument on test splice 30, to measure the initial of regulating valve
Viscous state.
Exemplified embodiment of the present invention is the foregoing is only, the scope of the present invention is not limited to.Any ability
The technical staff in domain, the equivalent variations made and modification on the premise of the design of the present invention and principle is not departed from, increase or
The use step of some devices is reduced, the scope of protection of the invention all should be belonged to.
Claims (9)
1. a kind of regulating valve viscosity property analyzes experimental provision, it is characterised in that：Described device includes regulating valve, frictional force and simulated
Part, controller, process object, rate-of-change sensor and data acquisition unit, frictional force analog component pass through a rigid connector
Connected with the valve rod of valve, rigid connector is connected with dynamic friction block again, and dynamic friction block is applied just by static friction block to it
Pressure, different pressure produce different frictional force, so that different friction characteristics are produced on valve rod, with analog regulation valve
Different viscous states, controller connection regulating valve, its output signal is as the input signal of regulating valve, and regulating valve connected again
Journey object, different regulating valve output makes the process variable of process object produce different values, rate-of-change sensor detection process becomes
The size of value, and give controller and data acquisition unit simultaneously, data acquisition unit also simultaneously the output signal of acquisition controller,
Positive pressure value on valve position signal and dynamic friction block.
2. a kind of regulating valve viscosity property analysis experimental provision as claimed in claim 1, it is characterised in that：Described frictional force
Analog component is grouped into by dynamic friction block movable part and static friction block pressure regulating part, is fixed with and is rigidly connected on dynamic friction block
Part, the other end of rigid connector is coupled on the valve rod of regulating valve, and stem movement makes dynamic friction block move in the same direction, static friction
Block is adjustable to the normal pressure of dynamic friction block, and the power is put on the side of dynamic friction block, and the gravity of static friction block can not be applied to
On brake pad.
3. a kind of regulating valve viscosity property analysis experimental provision as claimed in claim 1, it is characterised in that：Frictional force simulation part
Dynamic friction block movable part in part is by dynamic friction block, rigid connector, coupling, coaxial connector, sliding axle, bearing, survey
Try head, draught line, pulley and gravity compensation part is constituted.
4. a kind of regulating valve viscosity property analysis experimental provision as claimed in claim 1, it is characterised in that：Frictional force simulation part
Static friction block pressure regulating part point in part is by adjusting knob, accurate lead screw, accurate nut, anti-displacement fixture, support, upper pressure
Power part, flexible member, pressure sensor, static friction block fixture, clamping screw and static friction block are constituted.
5. a kind of regulating valve viscosity property analysis experimental provision as claimed in claim 3, it is characterised in that：Gravity compensation part leads to
Cross pulley and test splice connection, can offset dynamic friction block it is vertically-mounted when itself and its related fittings gravity.
6. a kind of regulating valve viscosity property analysis experimental provision as claimed in claim 1, it is characterised in that：Rigid connector connects
Regulating valve rod and dynamic friction block after connecing are synchronized with the movement, parallel to each other, and dead band and deformation are not present between the two.
7. a kind of regulating valve viscosity property analysis experimental provision as claimed in claim 1, it is characterised in that：Frictional force simulation part
Rotary motion is changed into linear running by the static friction block pressure regulating part point in part, then is transmitted to power by a flexible member
Above dynamic friction block.
8. a kind of regulating valve viscosity property analysis experimental provision as claimed in claim 4, it is characterised in that：The bullet of flexible member
Power scope is completely within the scope of the correspondence of the regulating valve rod friction needed for experiment.
9. a kind of regulating valve viscosity property analysis experimental provision as claimed in claim 1, it is characterised in that：Static friction block is installed
Displacement will not be produced after good in the direction of motion of dynamic friction block.
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| CN201510890316.7A CN105300685B (en) | 2015-12-07 | 2015-12-07 | A kind of regulating valve viscosity property analyzes experimental provision |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10104149A (en) * | 1996-09-30 | 1998-04-24 | Nippon Shokubai Co Ltd | Dynamic viscoelasticity measuring apparatus and evaluation of dynamic viscoelasticity |
| CN201935758U (en) * | 2010-12-02 | 2011-08-17 | 核动力运行研究所 | Device for testing dynamic friction force of pneumatic control valve |
| JP5012442B2 (en) * | 2007-11-13 | 2012-08-29 | トヨタ自動車株式会社 | Hydraulic system control device and valve timing control device |
| CN103971020A (en) * | 2014-05-23 | 2014-08-06 | 东南大学 | Method for detecting viscosity of pneumatic control valve |
| CN203838926U (en) * | 2014-05-20 | 2014-09-17 | 湖南科技大学 | Temperature control device of variable-temperature viscosity coefficient experimental instrument |
| CN104233951A (en) * | 2014-07-24 | 2014-12-24 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Multifunctional viscous damper and connecting method of multifunctional viscous damper |
| CN204647531U (en) * | 2015-05-06 | 2015-09-16 | 天津中电天仪科技有限公司 | The small-sized modulating valve of a kind of novel wear resistant high temperature resistance essence |
| CN205426490U (en) * | 2015-12-07 | 2016-08-03 | 江南大学 | Governing valve viscous characteristic analyzed experiment device |
-
2015
- 2015-12-07 CN CN201510890316.7A patent/CN105300685B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10104149A (en) * | 1996-09-30 | 1998-04-24 | Nippon Shokubai Co Ltd | Dynamic viscoelasticity measuring apparatus and evaluation of dynamic viscoelasticity |
| JP5012442B2 (en) * | 2007-11-13 | 2012-08-29 | トヨタ自動車株式会社 | Hydraulic system control device and valve timing control device |
| CN201935758U (en) * | 2010-12-02 | 2011-08-17 | 核动力运行研究所 | Device for testing dynamic friction force of pneumatic control valve |
| CN203838926U (en) * | 2014-05-20 | 2014-09-17 | 湖南科技大学 | Temperature control device of variable-temperature viscosity coefficient experimental instrument |
| CN103971020A (en) * | 2014-05-23 | 2014-08-06 | 东南大学 | Method for detecting viscosity of pneumatic control valve |
| CN104233951A (en) * | 2014-07-24 | 2014-12-24 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Multifunctional viscous damper and connecting method of multifunctional viscous damper |
| CN204647531U (en) * | 2015-05-06 | 2015-09-16 | 天津中电天仪科技有限公司 | The small-sized modulating valve of a kind of novel wear resistant high temperature resistance essence |
| CN205426490U (en) * | 2015-12-07 | 2016-08-03 | 江南大学 | Governing valve viscous characteristic analyzed experiment device |
Non-Patent Citations (2)
| Title |
|---|
| 气动调节阀粘滞特性的参数辨识;陈凯 等;《杭州电子科技大学学报》;20121231;第32卷(第6期);第133-136页 * |
| 调节阀式粘滞阻尼器原理与性能试验;黄镇 等;《东南大学学报(自然科学版)》;20070531;第37卷(第3期);第517-520页 * |
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