CN106885689A - Regulating valve dynamic stability test system - Google Patents
Regulating valve dynamic stability test system Download PDFInfo
- Publication number
- CN106885689A CN106885689A CN201510929165.1A CN201510929165A CN106885689A CN 106885689 A CN106885689 A CN 106885689A CN 201510929165 A CN201510929165 A CN 201510929165A CN 106885689 A CN106885689 A CN 106885689A
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- CN
- China
- Prior art keywords
- valve
- segment pipe
- valve seat
- regulating valve
- dynamic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/06—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Volume Flow (AREA)
Abstract
Regulating valve dynamic stability test system.In some operating modes, the stability that regulating valve may be influenceed to work in regulating valve due to the strong non-stationarity of flow of fluid, or even the vibration for causing valve.Only for control valve security, the accident such as valve rod vibration and fracture once occurred.The inventive method includes：Intake valve, described intake valve is connected with compressor, described compressor respectively with air outlet valve, by-passing valve is connected, described air outlet valve is connected with flowmeter, pressure gauge is sequentially installed with the pipeline that described air outlet valve is connected with described flowmeter, thermometer, described flowmeter is connected with diffusion segment pipe, described diffusion segment pipe is connected with voltage stabilizing segment pipe, described voltage stabilizing segment pipe is connected with convergence segment pipe, described convergence segment pipe is connected with regulating valve, described regulating valve is connected with Dynamic Signal amplifier, described Dynamic Signal amplifier is connected with dynamic collect system.The present invention is applied to the dynamic stability test of regulating valve.
Description
Technical field：
The present invention relates to a kind of regulating valve dynamic stability test system.
Background technology：
The typical machinery of regulating valve category or electrical category product, but it is that can carry out accurate adjustment to it by field bus technique after it combines modern information technologies with the maximum difference of manual valve, significantly enhances regulating valve critical role in the controls.The major function of regulating valve is the area by changing flow passage component and then the need for changing downstream pressure, temperature, the parameter such as flow to adapt to different operating modes.In some operating modes, the stability that regulating valve may be influenceed to work in regulating valve due to the strong non-stationarity of flow of fluid, or even the vibration for causing valve.Only for control valve security, the accident such as valve rod vibration and fracture once occurred.These phenomenons are substantially unstable with the valve of fluid induced relevant, i.e. gas in regulating valve（Liquid）The unstable of flowing causes the vibration of valve, wherein valve rod
-
The vibration performance of valve element is obvious.
The content of the invention：
It is an object of the invention to provide a kind of regulating valve dynamic stability test system.
Above-mentioned purpose is realized by following technical scheme：
A kind of regulating valve dynamic stability test system, its composition includes：Intake valve, described intake valve is connected with compressor, described compressor respectively with air outlet valve, by-passing valve is connected, described air outlet valve is connected with flowmeter, pressure gauge is sequentially installed with the pipeline that described air outlet valve is connected with described flowmeter, thermometer, described flowmeter is connected with diffusion segment pipe, described diffusion segment pipe is connected with voltage stabilizing segment pipe, described voltage stabilizing segment pipe is connected with convergence segment pipe, described convergence segment pipe is connected with regulating valve, described regulating valve is connected with Dynamic Signal amplifier, described Dynamic Signal amplifier is connected with dynamic collect system；
Pilot system used medium is air, to make inlet air flow uniformity preferable, by the next air of high-pressure air source by entering regulating valve after diffuser, pressure-stabilizing section, converging portion, air-flow flows into valve seat behind the circular passage of valve element and valve base chamber, enter discharge duct after valve seat divergent segment pressure, discharge duct is introduced and discharge after submerged exhaust mouthful outdoor, to reduce noise, airflow inlet and Way out into
90°
；
At valve pocket import, valve pocket top, valve seat throttling section, the position such as valve seat divergent segment and poppet head be provided with measuring point, also at valve seat throttling section and the multiple measuring points of poppet head arrangement, by the measurement to each measuring point, carry out the treatment of each point measurement data and the association analysis of result, it can be deduced that flow behavior in valve under various operating conditions；
Stem lift is larger or standard-sized sheet operating mode, smallest passage is the throttling section of valve seat in valve, if stem lift is smaller, the circular passage area that valve element and valve seat are formed is likely to less than the flow area at valve seat throttling section, general that the circular passage that valve element and valve seat top are formed is referred to as into first nozzle passage, in lift very little, the area of circular passage is smallest passage.Valve seat is referred to as second nozzle passage, is in second nozzle passage at area minimum at its throttling section.
Beneficial effects of the present invention：
In order to reduce contact measurement as far as possible to the smooth interference in regulating valve, present invention employs the U.S.
Kulite
The piezoresistive dynamic pressure sensor of Sensitive Object's production.The sensor integration silicon-sensitive element, and microsize is made using photoetching process, so that sensor has intrinsic frequency very high, low sluggish and excellent hot property and environmental performance, superior static properties and dynamic property, and firm and durable.Experiment select be
XCQ-062
Series, sensor diameter
Φ=1.6mm
, length
L=12mm
, operating temperature range is
-55
~
204
DEG C, intrinsic frequency is
330
~
500KHz
, certainty of measurement is full scale
0.1%
.Measured medium is non-conductive, non-corrosive liquids and gases.Because sensor is small, is designed during experiment and manufactured special fastener, in order to mount and dismount.When demarcating, the method for calibration generally comprises static calibration and dynamic calibration to pressure sensor, and it is linear that should first carry out static calibration to determine sensor, then can just carry out dynamic calibration.But the dynamic pressure for providing some standards is relatively difficult, so typically still using static criteria for the measurement of dynamic pressure at present.Experience have shown that, the response frequency of only whole pressure measuring system is sufficiently high, and the pressure measuring system crossed using static demarcating measures dynamic pressure, as a result there is enough precision.
Brief description of the drawings：
Figure
1
It is structural representation of the invention.In figure,
1
It is intake valve,
2
It is compressor,
3
It is air outlet valve,
4
It is pressure gauge,
5
It is thermometer,
6
It is by-passing valve,
7
It is flowmeter,
8
It is diffuser,
9
It is pressure-stabilizing section,
10
It is converging portion,
11
It is dynamic collect system,
12
It is Dynamic Signal amplifier,
13
It is valve rod,
14
It is valve element,
15
It is silk screen layer.
Figure
2
It is dynamic testing analysis schematic diagram of the invention.
Specific embodiment：
Embodiment
1
：
A kind of regulating valve dynamic stability test system, its composition includes：Intake valve, described intake valve is connected with compressor, described compressor respectively with air outlet valve, by-passing valve is connected, described air outlet valve is connected with flowmeter, pressure gauge is sequentially installed with the pipeline that described air outlet valve is connected with described flowmeter, thermometer, described flowmeter is connected with diffusion segment pipe, described diffusion segment pipe is connected with voltage stabilizing segment pipe, described voltage stabilizing segment pipe is connected with convergence segment pipe, described convergence segment pipe is connected with regulating valve, described regulating valve is connected with Dynamic Signal amplifier, described Dynamic Signal amplifier is connected with dynamic collect system；
Pilot system used medium is air, to make inlet air flow uniformity preferable, by the next air of high-pressure air source by entering regulating valve after diffuser, pressure-stabilizing section, converging portion, air-flow flows into valve seat behind the circular passage of valve element and valve base chamber, enter discharge duct after valve seat divergent segment pressure, discharge duct is introduced and discharge after submerged exhaust mouthful outdoor, to reduce noise, airflow inlet and Way out into
90°
；
At valve pocket import, valve pocket top, valve seat throttling section, the position such as valve seat divergent segment and poppet head be provided with measuring point, also at valve seat throttling section and the multiple measuring points of poppet head arrangement, by the measurement to each measuring point, carry out the treatment of each point measurement data and the association analysis of result, it can be deduced that flow behavior in valve under various operating conditions；
Stem lift is larger or standard-sized sheet operating mode, smallest passage is the throttling section of valve seat in valve, if stem lift is smaller, the circular passage area that valve element and valve seat are formed is likely to less than the flow area at valve seat throttling section, general that the circular passage that valve element and valve seat top are formed is referred to as into first nozzle passage, in lift very little, the area of circular passage is smallest passage.Valve seat is referred to as second nozzle passage, is in second nozzle passage at area minimum at its throttling section.
Embodiment
2
：
Embodiment
1
Described regulating valve dynamic stability test system, high frequency dynamic acquisition and analysis system can carry out multi-channel parallel dynamic acquisition, with a high speed, Large Copacity and the digitized advantage of transient state, be the comprehensive measuring system of high-performance of collection measurement, analysis and result output of one.It has highly stable circuit design and apparatus structure design, excellent hardware and software modular nature, the testing field such as transient acquisition and dynamic process monitoring record can be conveniently applied to, while parallel multi-channel data acquisition can be made.Each acquisition channel is respectively stored in data in respective buffer, and inner computer processes these data by unified bus.Because each passage is all carried
A/D
And buffer, thus highest acquisition rate will not be made to decline or storage depth decline because passage extends, whole sampling channel is to carry out parallel, thus can not consider the time difference of interchannel.Its fundamental mode is operated by collection, treatment, the order for gathering again and reprocessing.During dynamic analysis, mainly use it the enough data of deeper buffers store are for processing and be used.System highest sample rate is
1.25MPa
, sampling precision be
12bit
, the parameter of UNSTEADY FLOW and its change in valve can be timely responded to.
Pressure signal adjusting apparatus is a kind of instrument being adjusted to pressure signal, by the way that the last output signal for obtaining of regulation is available for display and data acquisition, is used as the preamplifier of high frequency dynamic collect system in test.Adjusting apparatus is main by pressure sensor, sensor power power supply, measurement instrumentation amplifier, notch circuit and whole machine power supply
5
Part constitutes, can be simultaneously right
12
Road pressure signal is nursed one's health, and can not only meet the conditioning carried out for the pressure sensor signal of different model, while can also nurse one's health other voltage signals.To reduce the interference of industrial frequency AC signal, its output par, c is provided with notch circuit, and its chopping frequence is
50±5Hz
, therefore substantially increase the antijamming capability of whole regulation circuit.
The dynamic pressure measurement signal of impression is first passed through high-frequency preamplifier by miniature dynamical stress sensor will
mV
Level signal amplifies, and is then input into the fast parallel collection of high frequency dynamic collect system and stores.Processed by various time domains, frequency domain and filtering signal again and obtain real useful signal, finally drawn out its indicatrix and then obtain nonstationary flow dynamic characteristic in valve.
Static pressure measure and its acquisition system by
3051CD-BC
Intelligent pressure transmitter,
1151
Series of pressure transmitters,
35951C
Data acquisition board and
35954B
Data acquisition interface plate and computer are combined, and are substantially carried out in test regulating valve import and export flow and the isoparametric measurement of static pressure.Due to using Real-time Collection, enable the measurement data of pressure and other parameters and enter to obtain hourly value, reduce measurement error.
Spectrum analysis analysis system is made up of computer, printer, display, signal amplifier, wave filter, data acquisition unit and analysis software etc..Vibration characteristics of the part after external force percussion is converted to data signal by the system by computer acquisition system, and spectrum analysis is carried out to it, obtains each order harmonic frequency of vibration signal, you can each rank natural frequency of vibration for obtaining.Because regulating valve vibration mode is mainly shown as valve rod
—
The vibration of valve element, so carrying out valve rod using spectrum analyzer system in experiment
-
The spectrum analysis of disc vibration signal.
Flowing in regulating valve determines characteristic with typically non-, and dynamic measurement can accurately and timely determine instantaneous assorted and its time to time change the value of its interior flow field.Extensively, the problem being related to is a lot, it is necessary to obtain true and reliable data and result for Data Management Analysis content in dynamic test, and to find out rule, wherein spectrum analysis and waveform analysis is exactly most important and most basic method in Dynamic Data Processing.Spectrum analysis and waveform analysis were not only separate but also closely related, there is obvious difference between them, can mutually be changed by Fourier transform.Frequency spectrum and waveform analysis have become most common method in signal analysis with Random data processing method.
Claims (1)
1. a kind of regulating valve dynamic stability test system, its composition includes：Intake valve, it is characterized in that：Described intake valve is connected with compressor, described compressor respectively with air outlet valve, by-passing valve is connected, described air outlet valve is connected with flowmeter, pressure gauge is sequentially installed with the pipeline that described air outlet valve is connected with described flowmeter, thermometer, described flowmeter is connected with diffusion segment pipe, described diffusion segment pipe is connected with voltage stabilizing segment pipe, described voltage stabilizing segment pipe is connected with convergence segment pipe, described convergence segment pipe is connected with regulating valve, described regulating valve is connected with Dynamic Signal amplifier, described Dynamic Signal amplifier is connected with dynamic collect system；
Pilot system used medium is air, to make inlet air flow uniformity preferable, by the next air of high-pressure air source by entering regulating valve after diffuser, pressure-stabilizing section, converging portion, air-flow flows into valve seat behind the circular passage of valve element and valve base chamber, enter discharge duct after valve seat divergent segment pressure, outdoor is discharged after discharge duct is introduced into submerged exhaust mouthful, to reduce noise, airflow inlet and Way out are in 90 °；
At valve pocket import, valve pocket top, valve seat throttling section, the position such as valve seat divergent segment and poppet head be provided with measuring point, also at valve seat throttling section and the multiple measuring points of poppet head arrangement, by the measurement to each measuring point, carry out the treatment of each point measurement data and the association analysis of result, it can be deduced that flow behavior in valve under various operating conditions；
Stem lift is larger or standard-sized sheet operating mode, smallest passage is the throttling section of valve seat in valve, if stem lift is smaller, the circular passage area that valve element and valve seat are formed is likely to less than the flow area at valve seat throttling section, it is general that the circular passage that valve element and valve seat top are formed is referred to as first nozzle passage, in lift very little, the area of circular passage is smallest passage, and valve seat is referred to as into second nozzle passage, is in second nozzle passage at area minimum at its throttling section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510929165.1A CN106885689A (en) | 2015-12-15 | 2015-12-15 | Regulating valve dynamic stability test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510929165.1A CN106885689A (en) | 2015-12-15 | 2015-12-15 | Regulating valve dynamic stability test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106885689A true CN106885689A (en) | 2017-06-23 |
Family
ID=59174963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510929165.1A Pending CN106885689A (en) | 2015-12-15 | 2015-12-15 | Regulating valve dynamic stability test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106885689A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372764A (en) * | 2018-12-03 | 2019-02-22 | 东方电气集团东方汽轮机有限公司 | A kind of multiple working medium axial admission axial-flow compressor |
| CN109974952A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of device for pipe vibration test |
| TWI734052B (en) * | 2018-11-23 | 2021-07-21 | 光旴科技股份有限公司 | Force measuring device of fluid control valve |
-
2015
- 2015-12-15 CN CN201510929165.1A patent/CN106885689A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974952A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of device for pipe vibration test |
| TWI734052B (en) * | 2018-11-23 | 2021-07-21 | 光旴科技股份有限公司 | Force measuring device of fluid control valve |
| CN109372764A (en) * | 2018-12-03 | 2019-02-22 | 东方电气集团东方汽轮机有限公司 | A kind of multiple working medium axial admission axial-flow compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170623 |
|
| WD01 | Invention patent application deemed withdrawn after publication |