CN105370670A - Water hammer transient generator - Google Patents
Water hammer transient generator Download PDFInfo
- Publication number
- CN105370670A CN105370670A CN201510939081.6A CN201510939081A CN105370670A CN 105370670 A CN105370670 A CN 105370670A CN 201510939081 A CN201510939081 A CN 201510939081A CN 105370670 A CN105370670 A CN 105370670A
- Authority
- CN
- China
- Prior art keywords
- valve body
- water hammer
- linkage rod
- motor
- valve
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/12—Fluid oscillators or pulse generators
Abstract
The invention provides a water hammer transient generator, relates to a transient flow excitation system, belongs to the technical field of fluid mechanics, and aims to solve the problem that continuous frequency change cannot be realized by a traditional water hammer generating system. The water hammer transient generator comprises a control system, a motor, a linkage rod and a valve body, wherein the control system drives the motor and controls the motor to drive the linkage rod to carry out sinusoidal motion; the lower end of the linkage rod is longitudinally connected with the valve body, so that the longitudinal opening degree of the valve body is changed according to a sine rule; the valve body is communicated with a pipe in the transverse direction; and when water pressure of a transverse inlet of the valve body is sufficient, a water hammer which is changed according to the sine rule flows out of a transverse outlet of the valve body. The longitudinal and transverse volume change relation of the valve is utilized fully, volume change in the single direction is controlled to realize volume sinusoidal change in the other direction, and drained fluid which is changed continuously is provided and can be used for correlational research and experiments directly.
Description
Technical field
The present invention relates to a kind of transient flow activating system, belong to hydrodynamics technology field.
Background technique
The research of multiple physical states transient flow generation system controlled at present mainly concentrates on non-adjustable, single-mode, time-dependent system several modes.From development, these systems all adopt single physical signalling input pattern to control to produce the water hammer of certain pressure head or frequency.Along with the development of science and technology, this interruption of single-frequency, nonadjustable water hammer occurring mode narrow limitation manifest gradually, the complex flowfield Problem Areas analyses such as the blocking of flowing for pressure conduit and leakage are inadaptable, one can produce fast, and the multi-functional water hammer generator that frequency can regulate continuously is needed badly and researched and developed and drop into application.
In water hammer generation system in the past, the generation of water hammer mainly relies on and regulates the output frequency of motor to produce corresponding water hammer, and this system can only produce the water hammer of several characteristic frequency due to the defect in design, and successional change regulates and cannot realize.When carrying out flow State Analysis to flow fields such as fluids within pipes, need the relevant parameter detecting consecutive variations frequency Fluid field, traditional water hammer generation systems can not realize above-mentioned functions because of its narrow limitation.
Summary of the invention
The object of the invention is the problem that cannot realize continuity change of frequency in order to solve traditional water hammer generation systems, the invention provides a kind of water hammer transition generator.
Water hammer transition generator of the present invention, described generator comprises control system, motor, linkage rod and valve body;
Control system drive motor, control driven by motor linkage rod and do sinusoidal motion, the lower end of linkage rod is connected with the longitudinal direction of valve body, and then valve body is changed sinusoidally in the aperture of longitudinal direction, valve body in the horizontal with pipeline communication, when the horizontal inlet water pressure of valve body is sufficient, the water hammer changed sinusoidally is flowed out in the transverse direction outlet of valve body.
Described control system comprises computer and display device;
Computer, for exporting control signal, drive motor;
Display device, for the control signal of display translation.
Described valve body is spherical valve.
Beneficial effect of the present invention is, the present invention makes full use of valve longitudinal direction, horizontal volume variation relation, and the Volume Changes controlled on single direction realizes the volume sinusoidal variations on another direction; The present invention is simple to operate, only needs the sine on one of them direction of Electric Machine Control to run; Present invention achieves can consecutive variations and the water hammer generator changed by sinusoidal rule; The present invention greatly reduces operation easier, and overall process realizes intelligent, without the need to regulation output frequency repeatedly; The invention provides continually varying output fluid, can correlative study, experiment etc. be directly used in.
Accompanying drawing explanation
Fig. 1 is the principle schematic of water hammer transition generator in embodiment.
The Motion curves schematic diagram of the spherical valve vibration in Fig. 2 embodiment.
Embodiment
Composition graphs 1 and Fig. 2 illustrate present embodiment, the water hammer transition generator described in present embodiment, and as shown in Figure 1, described generator comprises control system, motor, linkage rod and valve body; The valve body of present embodiment adopts spherical valve to realize; Spherical valve in the horizontal with pipeline communication, control system sends control signal, control driven by motor linkage rod and do sinusoidal motion, thus the spherical valve aperture be attached thereto also will change sinusoidally, and frequency is identical with control signal, when ensureing flow inlet end hydraulic pressure abundance in spherical valve substantially horizontal, the flow flowed out through this spherical valve substantially horizontal also will change sinusoidally, thus realizes the function generating sinusoidal variations fluid;
Spherical valve volume flowrate derivation:
Usually, using position during valve open as fixed length reference position, namely
at arbitrary flow, when Pressure Drop and valve location, general equation is
these two equations are compared and are obtained General valve equation, introduce the position τ=(C of nondimensional valve in equation
da
g)/(C
da
g)
0:
Valve is mean place around the specific position that it vibrates, that is:
In formula
the Pressure Drop of mean flowrate by producing during valve.Fig. 2 represents a kind of sinusoidal motion of valve,
τ ' in formula=R
e(T
ve
i ω t).Plural number T
vinclude amplitude and the phase angle of the motion of valve.The mean value of Q, H and τ and shake number are brought into equation (1), when
time, utilize binomial expansion to representation
carry out linearization, and deduct mean flowrate, then the equation of valve becomes:
With complex representation, the pressure head equation of valve upstream side is:
The hydraulic resistance of the upstream side of valve is:
From spherical valve volume flowrate derivation, the impact of the frequency of the control signal that the uncontrolled system of function that this present embodiment generates the change of sinusoidal rule sends, as long as control signal is sinusoidal rule, spherical valve substantially horizontal flow out volume flowrate be exactly change sinusoidally.
The control system of present embodiment comprises computer and display device;
Computer, for exporting control signal, drive motor;
Display device, for the control signal of display translation.
Present embodiment makes full use of the knowledge of infinitesimal calculus, proposes the transformation relation between the horizontal volume of longitudinal bodies sum; Achieve user and produce the water hammer requirement changed by sinusoidal rule, namely by the sinusoidal motion of single control longitudinal linkage bar, transversely fluid is changed by sinusoidal rule.Present embodiment solves the difficult problem technically producing continually varying fluid, only needs the motion of single control linkage rod to realize correlation function, greatly reduces related experiment difficulty and running cost.The present embodiment experiment that can be used in frequency response method is carried out missing, jam detection.
Claims (3)
1. a water hammer transition generator, is characterized in that, described generator comprises control system, motor, linkage rod and valve body;
Control system drive motor, control driven by motor linkage rod and do sinusoidal motion, the lower end of linkage rod is connected with the longitudinal direction of valve body, and then valve body is changed sinusoidally in the aperture of longitudinal direction, valve body in the horizontal with pipeline communication, when the horizontal inlet water pressure of valve body is sufficient, the water hammer changed sinusoidally is flowed out in the transverse direction outlet of valve body.
2. water hammer transition generator according to claim 1, it is characterized in that, described control system comprises computer and display device;
Computer, for exporting control signal, drive motor;
Display device, for the control signal of display translation.
3. water hammer transition generator according to claim 1 and 2, is characterized in that, described valve body is spherical valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510939081.6A CN105370670A (en) | 2015-12-11 | 2015-12-11 | Water hammer transient generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510939081.6A CN105370670A (en) | 2015-12-11 | 2015-12-11 | Water hammer transient generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105370670A true CN105370670A (en) | 2016-03-02 |
Family
ID=55373175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510939081.6A Pending CN105370670A (en) | 2015-12-11 | 2015-12-11 | Water hammer transient generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105370670A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2177089Y (en) * | 1993-03-16 | 1994-09-14 | 黄序韬 | Water flushing valve |
| CN2448972Y (en) * | 2000-07-27 | 2001-09-19 | 周德方 | Water-hammer generator |
| CN1514960A (en) * | 2001-04-24 | 2004-07-21 | �����ػ��������豸����˾ | System and method for controlling and configuring mass flow controller |
| US20090209847A1 (en) * | 2008-02-16 | 2009-08-20 | Geng Li | Magnetic resonance elastograph system with hydraulic driver |
| CN202082463U (en) * | 2011-05-26 | 2011-12-21 | 中国地质科学院郑州矿产综合利用研究所 | Pulsating gas flow generating device |
| CN102735094A (en) * | 2012-05-11 | 2012-10-17 | 武汉工程大学 | Socket-joint type pulsating flow generator |
| CN102840193A (en) * | 2012-09-10 | 2012-12-26 | 太原理工大学 | Water pressure fluctuation excitation device |
| CN102954070A (en) * | 2012-10-18 | 2013-03-06 | 中北大学 | Continuous water hammer shock vibration device |
-
2015
- 2015-12-11 CN CN201510939081.6A patent/CN105370670A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2177089Y (en) * | 1993-03-16 | 1994-09-14 | 黄序韬 | Water flushing valve |
| CN2448972Y (en) * | 2000-07-27 | 2001-09-19 | 周德方 | Water-hammer generator |
| CN1514960A (en) * | 2001-04-24 | 2004-07-21 | �����ػ��������豸����˾ | System and method for controlling and configuring mass flow controller |
| US20090209847A1 (en) * | 2008-02-16 | 2009-08-20 | Geng Li | Magnetic resonance elastograph system with hydraulic driver |
| CN202082463U (en) * | 2011-05-26 | 2011-12-21 | 中国地质科学院郑州矿产综合利用研究所 | Pulsating gas flow generating device |
| CN102735094A (en) * | 2012-05-11 | 2012-10-17 | 武汉工程大学 | Socket-joint type pulsating flow generator |
| CN102840193A (en) * | 2012-09-10 | 2012-12-26 | 太原理工大学 | Water pressure fluctuation excitation device |
| CN102954070A (en) * | 2012-10-18 | 2013-03-06 | 中北大学 | Continuous water hammer shock vibration device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Vibration analysis of pipelines with arbitrary branches by absorbing transfer matrix method | |
| Bai et al. | Using vortex strength wake oscillator in modelling of vortex induced vibrations in two degrees of freedom | |
| Wan et al. | Water hammer simulation of a series pipe system using the MacCormack time marching scheme | |
| Zhang et al. | Research on double-outlet valveless piezoelectric pump with fluid guiding body | |
| Rahe | Optimizing the active speed control unit for in-line inspection tools in gas | |
| Yao et al. | A new multi-field coupled dynamic analysis method for fracturing pipes | |
| CN204514402U (en) | A kind of differential pressure mass flowmeter for vortex street | |
| Tang et al. | Characterization of a novel fluidic friction-reduction tool used in extended-reach well considering periodic particle-laden jet | |
| CN105370670A (en) | Water hammer transient generator | |
| Tang et al. | Influence of rheological parameters on cement slurry penetration characteristics of novel oscillating grouting technology | |
| He et al. | Molding and simulation of pig speed with brake unit in gas pipeline | |
| Tesař et al. | Effective hydraulic resistance of a nozzle in an electrodynamic actuator generating hybrid-synthetic jet–Part I: Data acquisition | |
| Li et al. | Pulsating pressurization of two-phase fluid in a pipe filled with water and a little gas | |
| Bodart et al. | Time-dependent numerical simulation of viscoelastic flow and stability | |
| Li et al. | Fluid-structure interaction vibration response analysis of the hydrocyclone under periodic excitation | |
| Kim et al. | Pulsatile Poiseuille flows in microfluidic channels with back-and-forth mode | |
| CN204649252U (en) | A kind of taper mass flowmeter for vortex street | |
| Wu et al. | Numerical simulation of transient flow with column separation using the lattice Boltzmann method | |
| Zhou et al. | Study on mechanism of layered water injection by pressure pulse control | |
| Wan et al. | Attenuation analysis of hydraulic transients with laminar-turbulent flow alternations | |
| CN204082127U (en) | A kind of directional tool Work condition analogue experimental facilities | |
| Sun et al. | An analytical model for flow rectification of a microdiffuser driven by an oscillating source | |
| Salim et al. | Evaluation of methods describing the flow of gas-liquid mixture in wells | |
| Fries et al. | A moving piston boundary condition including gap flow in OpenFOAM | |
| Paridaens et al. | Dc flow investigations in thermoacoustic prime mover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160302 |
|
| RJ01 | Rejection of invention patent application after publication |