CN102678688A - Multi-channel adjustable pulsating flow generation device - Google Patents
Multi-channel adjustable pulsating flow generation device Download PDFInfo
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- CN102678688A CN102678688A CN2012101455679A CN201210145567A CN102678688A CN 102678688 A CN102678688 A CN 102678688A CN 2012101455679 A CN2012101455679 A CN 2012101455679A CN 201210145567 A CN201210145567 A CN 201210145567A CN 102678688 A CN102678688 A CN 102678688A
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- output branch
- branch road
- frequency modulation
- stop valve
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Abstract
The invention relates to a multi-channel adjustable pulsating flow generation device, which comprises a water tank, an output branch I, an output branch II, a bypass III and a main path IV, wherein one end of a first frequency modulated pipeline pump of the output branch I is connected with the water tank, and the other end of the first frequency modulated pipeline pump is connected with a first cut-off valve; one end of a second frequency modulated pipeline pump of the output branch II is connected with the water tank, and the other end of the second frequency modulated pipeline pump is connected with a second cut-off valve; the pulsating flow turbulence device is connected with the second cut-off valve through two ports of a tee A; the other port of the tee A is connected with the bypass III; a check valve is connected with the pulsating flow turbulence device; the output branch II is connected with the output branch I through two ports of a tee B; the other port of the tee B is connected with the main path IV; and fluid of the output branch I and fluid of the output branch II are communicated to the main path IV to output pulsating flow. The multi-channel adjustable pulsating flow generation device has the advantages of simple device structure, reliable operation and capability of meeting different pulsating flow requirements.
Description
Technical field
The present invention relates to the adjustable pulsed flow generating means of a kind of multichannel, this device is used for accurately producing by the periodically variable pulsed flow of demand rule at pipeline.
Background technique
The core starting point of Heat Transfer developing direction is close three big leading science and technology----biologies, information and the nanosecond science and technology that combine world today social economy and scientific technological advance in China's Engineering Thermophysics subject.At present, pulsation is conducted heat to study and is all concentrated on this three aspects.Can realize dispelling the heat efficiently and heat transmission function through the pulsation heat transfer technology, solve the thermal boundary bottleneck of key areas and the consumption that reduces the energy greatly.The pulsation Research on Heat Transfer is conducted heat from the pulsation that macro-examination progressively gets into micro/nano-scale, like little drop and little heat exchanger etc.These are indicating that all the pulsation heat transfer has broad application background and huge potentiality to be exploited, and have important research value, and it is very necessary to carry out relevant research.This seminar is carrying out national natural science fund subsidy project " the vibrating enhanced heat-transfer mechanism research of tubular heat exchanger flow-induced " research (NO.50976080) at present; This important function for of research also relates to pulsed flow, becomes the problem that needs solve so seek to obtain pulsed flow.The domestic patent No. is the pulsating flow generator of " CN200910060614.8 "; The tentatively rate of flow of fluid of property performance period variation pulsation; But this pulsating flow generator can only be realized the adjusting of ripple frequency; Can not realize the adjusting of pulse amplitude, and the periodically pulsing of the fluid of this pulsating flow generator generation is accurate inadequately.Based on this, should seek to solve the accurate adjusting of three amounts such as pulsed flow mean velocity, ripple frequency and pulse amplitude.
Summary of the invention
Technical problem to be solved by this invention is to above-mentioned existing technology and the adjustable pulsed flow generating means of multichannel that proposes; Realization is to the accurate adjusting of pulsation mean velocity, ripple frequency and three parameters of pulse amplitude, and it is desired by the periodically variable pulsed flow of specific rule to produce the user.
The present invention solves the problems of the technologies described above the technological scheme that is adopted to be: multichannel is adjustable pulsed flow generating means, it is characterized in that including water tank, output branch road I, output branch road II, bypass III and main road IV,
Wherein, Described output branch road I comprises the first frequency modulation pipeline mounted pump and first stop valve; One end of the first frequency modulation pipeline mounted pump is connected with water tank, and the other end links to each other with first stop valve, and the first frequency modulation pipeline mounted pump is used to export constant-pressure fluid; First stop valve is used for regulating output branch road I output flow size, the fluid that delivery pressure is constant;
Described output branch road II comprises the second frequency modulation pipeline mounted pump, second stop valve, pulsation disturbing flow device and safety check; One end of the second frequency modulation pipeline mounted pump is connected with water tank; The other end links to each other with second stop valve, and the second frequency modulation pipeline mounted pump is used to export constant-pressure fluid, and second stop valve is used for regulating output branch road II output flow size; Two interfaces through threeway A between the described pulsation disturbing flow device and second stop valve link to each other; Another interface of threeway A links to each other with the bypass III, and safety check links to each other with the pulsation disturbing flow device, is used for preventing that the fluid of exporting the branch road I from getting into output branch road II;
Described output branch road II links to each other with two interfaces of output branch road I through threeway B, and another interface of threeway B links to each other with the main road IV, and output branch road I feeds the main road IV, output ripple stream with the fluid of output branch road II.
Press such scheme, described pulsation disturbing flow device is formed by connecting frequency modulation motor and vane-type shutter, and frequency modulation motor is used to regulate the ripple frequency of output branch road II, and the rotating speed of frequency modulation motor is 1/2 of a ripple frequency.Through frequency modulation motor control blade rotational speed, blade can rotate continuously, in the rotary course valve passage is realized the change of " gradually opening-gradually closes-gradually open ", thus the output ripple fluid, and the rotating speed adjustable of frequency modulation motor is through this adjusting ripple frequency.
Press such scheme, include a stop valve in the described bypass III, stop valve links to each other with water tank, is used to regulate the pulsed flow flow of bypass.When producing pulsed flow in the output branch road II, the fluid in the bypass III is pulsed simultaneously, and this part pulsed flow is back to water tank, realizes the adjusting to pulsed flow in the output branch road II.
Press such scheme, described main road IV includes an electromagnetic flowmeter.Through gathering the flow of electromagnetic flowmeter, be convenient to regulate the flow of output branch road I and output branch road II.
Press such scheme, each mouth of pipe sectional area of pipeline of said output branch road I, output branch road II, bypass III and main road IV equates.Therefore, the flow velocity in the main road IV is the flow velocity sum of output branch road I and output branch road II.
Major advantage of the present invention is: 1) regulate steady state flow through output branch road I; Output branch road II obtains pulsating flow; And regulate rotating speed of motor and can accurately realize the adjusting to mean velocity, ripple frequency and the pulse amplitude of pulsed flow in the main road IV, obtain the pulsed flow of researching value; 2) when the driven by motor blade rotates; The periodic variation appears in the sectional area of vane-type shutter; The also variation of generating period property thereupon of flow resistance this moment, the existence of bypass III at this moment makes the cyclically-varying of vane-type shutter place flow resistance be converted into the cyclically-varying of output flow; 3) this apparatus structure is simple, and is reliable, can satisfy different pulsed flow requirements.
Description of drawings
Fig. 1 is the structure principle chart of the embodiment of the invention;
Among the figure 1, water tank, 2, the second frequency modulation pipeline mounted pump, 3, second stop valve, 4, threeway A, 5, stop valve; 6, frequency modulation motor, 7, vane-type shutter, 8, safety check, 9, elbow; 10, the first frequency modulation pipeline mounted pump, 11, first stop valve, 12, threeway B, 13, electromagnetic flowmeter; 14, output branch road I, 15, output branch road II, 16, the bypass III, 17, the main road IV.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
As shown in Figure 1; Multichannel is adjustable pulsed flow generating means; Include water tank 1, output branch road I 14, output branch road II 15, bypass III 16 and main road IV 17, each mouth of pipe sectional area of pipeline of said output branch road I, output branch road II, bypass III and main road IV equates.Therefore, the flow velocity in the main road IV is the flow velocity sum of output branch road I with output branch road II, the flow direction of fluid shown in arrow among the figure,
Wherein, Described output branch road I comprises that an end of the first frequency modulation pipeline mounted pump 10 and first stop valve, 11, the first frequency modulation pipeline mounted pumps is connected with water tank, and the fluid in the water tank is extracted in the output branch road I 14; The other end links to each other with first stop valve; The first frequency modulation pipeline mounted pump is used to export constant-pressure fluid, and first stop valve is used for regulating output branch road I output flow size, the fluid that delivery pressure is constant;
Described output branch road II comprises the second frequency modulation pipeline mounted pump 2, second stop valve 3, pulsation disturbing flow device and safety check 8; One end of the second frequency modulation pipeline mounted pump is connected with water tank, and the fluid in the second frequency modulation pipeline mounted pump, the 2 suction water tanks 1 gets into output branch road II 15, and the other end links to each other with second stop valve; The second frequency modulation pipeline mounted pump is used to export constant-pressure fluid; Second stop valve is used for regulating output branch road II output flow size, and two interfaces through threeway A4 between the described pulsation disturbing flow device and second stop valve link to each other, and another interface of threeway A links to each other with the bypass III; Include a stop valve 5 in the described bypass III; Be used to regulate the flow of bypass III 16, stop valve links to each other with water tank, is used to regulate the pulsed flow flow of bypass.When producing pulsed flow in the output branch road II; Fluid in the bypass III is pulsed simultaneously, and this part pulsed flow is back to water tank, realizes the adjusting to pulsed flow in the output branch road II; Safety check 8 links to each other with the pulsation disturbing flow device; The pulsating fluid of output is used for preventing that the fluid of exporting the branch road I from getting into output branch road II, safety check 8 back connecting bends 9 through safety check 8;
Described output branch road II links to each other with two interfaces of output branch road I through threeway B12; Another interface of threeway B links to each other with main road IV 17; Output branch road I feeds the main road IV with the fluid of output branch road II, output ripple stream, and described main road IV includes an electromagnetic flowmeter 13.Through gathering the flow of electromagnetic flowmeter, be convenient to regulate the flow of output branch road I and output branch road II.
Described pulsation disturbing flow device is formed by connecting frequency modulation motor 6 and vane-type shutter 7, and frequency modulation motor 6 is used to regulate the ripple frequency of output branch road II 15, and the rotating speed of frequency modulation motor 6 is 1/2 of a ripple frequency.Through frequency modulation motor control blade rotational speed, blade can rotate continuously, in the rotary course valve passage is realized the change of " gradually opening-gradually closes-gradually open ", thus the output ripple fluid, and the rotating speed adjustable of frequency modulation motor is through this adjusting ripple frequency.
According to the conservation of mass and energy theorem in the fluid mechanics, the fluctuating velocity of this pulsed flow device main road IV 17 is the flow velocity sum of output branch road I 14 with output branch road II 15; Flow velocity in the output branch road I 14 does
V 0 , the flow velocity in the output branch road II 15 does
V 1 | sin2 π nt|, in the formula
nBe frequency modulation motor 6 rotating speeds,
tBe the time; Main road IV 17 fluctuating velocities do
V=
V 0 + V 1 | sin2 π nt|, the pulsed flow mean velocity does
=
V 0 + 1/2
V 1 , ripple frequency does
f=2
n, pulse amplitude does
A=
V 1 / (2
V 0 +
V 1 ).When output branch road I 14 flows are mediated, close second stop valve 3 of output branch road II 15 earlier, regulate the flow velocity of output branch road I 14, regulate the back and keep stop valve 11 apertures of output branch road I 14 constant; Then, open second stop valve 3 of output branch road II 15, open the second frequency modulation pipeline mounted pump 2 and start frequency modulation motor 6 rotating speed to 1/2 ripple frequency
fThereby the aperture of regulating second stop valve 3 and stop valve 5 changes the flow velocity of output branch road II 15, through observing the reading of electromagnetic flowmeter 13, till meeting the demands.
The present invention accurately obtains pulsed flow mean velocity, ripple frequency and the pulse amplitude of needs through the acting in conjunction of output branch road I 14, output branch road II 15, bypass III 16 and frequency modulation motor 6, and is simple and practical, easy to adjust.
Claims (5)
1. the adjustable pulsed flow generating means of multichannel is characterized in that including water tank (1), output branch road I (14), output branch road II (15), bypass III (16) and main road IV (17),
Wherein, Described output branch road I comprises the first frequency modulation pipeline mounted pump (10) and first stop valve (11); One end of the first frequency modulation pipeline mounted pump is connected with water tank, and the other end links to each other with first stop valve, and the first frequency modulation pipeline mounted pump is used to export constant-pressure fluid; First stop valve is used for regulating output branch road I output flow size, the fluid that delivery pressure is constant;
Described output branch road II comprises the second frequency modulation pipeline mounted pump (2), second stop valve (3), pulsation disturbing flow device and safety check (8); One end of the second frequency modulation pipeline mounted pump is connected with water tank; The other end links to each other with second stop valve, and the second frequency modulation pipeline mounted pump is used to export constant-pressure fluid, and second stop valve is used for regulating output branch road II output flow size; Two interfaces through threeway A (4) between the described pulsation disturbing flow device and second stop valve link to each other; Another interface of threeway A links to each other with the bypass III, and safety check (8) links to each other with the pulsation disturbing flow device, is used for preventing that the fluid of exporting the branch road I from getting into output branch road II;
Described output branch road II links to each other with two interfaces of output branch road I through threeway B (12), and another interface of threeway B links to each other with main road IV (17), and output branch road I feeds the main road IV, output ripple stream with the fluid of output branch road II.
2. by the adjustable pulsed flow generating means of the described multichannel of claim 1; It is characterized in that described pulsation disturbing flow device is formed by connecting frequency modulation motor (6) and vane-type shutter (7); Frequency modulation motor (6) is used for regulating the ripple frequency of output branch road II (15), and the rotating speed of frequency modulation motor (6) is 1/2 of a ripple frequency.
3. by claim 1 or the adjustable pulsed flow generating means of 2 described multichannels, it is characterized in that including a stop valve (5) in the described bypass III, stop valve links to each other with water tank, is used to regulate the pulsed flow flow of bypass.
4. by claim 1 or the adjustable pulsed flow generating means of 2 described multichannels, it is characterized in that described main road IV includes an electromagnetic flowmeter (13),, be convenient to regulate the flow of output branch road I and output branch road II through gathering the flow of electromagnetic flowmeter.
5. by claim 1 or the adjustable pulsed flow generating means of 2 described multichannels, it is characterized in that each mouth of pipe sectional area of pipeline of said output branch road I, output branch road II, bypass III and main road IV equates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210145567.9A CN102678688B (en) | 2012-05-11 | 2012-05-11 | Multi-channel adjustable pulsating flow generation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210145567.9A CN102678688B (en) | 2012-05-11 | 2012-05-11 | Multi-channel adjustable pulsating flow generation device |
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| CN102678688A true CN102678688A (en) | 2012-09-19 |
| CN102678688B CN102678688B (en) | 2014-10-15 |
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| CN201210145567.9A Expired - Fee Related CN102678688B (en) | 2012-05-11 | 2012-05-11 | Multi-channel adjustable pulsating flow generation device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107367372A (en) * | 2017-08-07 | 2017-11-21 | 西南石油大学 | A kind of multichannel water hole cavitation experimental provision |
| CN109299571A (en) * | 2018-10-25 | 2019-02-01 | 内蒙古科技大学 | A kind of design method of the Tuned Liquid based on structural fire protection water tank |
| CN113495010A (en) * | 2020-03-20 | 2021-10-12 | 上海微电子装备（集团）股份有限公司 | Disturbance force generating device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3415059A (en) * | 1964-11-02 | 1968-12-10 | Nat Res Dev | Apparatus for generating fluid pulses |
| SU802669A1 (en) * | 1979-03-27 | 1981-02-07 | Челябинский Политехнический Институтим. Ленинского Комсомола | Inertial pulser |
| SU900056A1 (en) * | 1979-08-08 | 1982-01-23 | Челябинский политехнический институт им. Ленинского комсомола | Inertial pulsator |
| DE102006036776A1 (en) * | 2006-08-07 | 2008-02-14 | Robert Bosch Gmbh | Pressure pulse generator for a hydraulic system, to determine unwanted pulsation, has a control with a cyclic rotary valve unit to give high frequency pulses |
| CN101476581A (en) * | 2009-01-21 | 2009-07-08 | 武汉工程大学 | Pulsating flow generator |
-
2012
- 2012-05-11 CN CN201210145567.9A patent/CN102678688B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3415059A (en) * | 1964-11-02 | 1968-12-10 | Nat Res Dev | Apparatus for generating fluid pulses |
| SU802669A1 (en) * | 1979-03-27 | 1981-02-07 | Челябинский Политехнический Институтим. Ленинского Комсомола | Inertial pulser |
| SU900056A1 (en) * | 1979-08-08 | 1982-01-23 | Челябинский политехнический институт им. Ленинского комсомола | Inertial pulsator |
| DE102006036776A1 (en) * | 2006-08-07 | 2008-02-14 | Robert Bosch Gmbh | Pressure pulse generator for a hydraulic system, to determine unwanted pulsation, has a control with a cyclic rotary valve unit to give high frequency pulses |
| CN101476581A (en) * | 2009-01-21 | 2009-07-08 | 武汉工程大学 | Pulsating flow generator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107367372A (en) * | 2017-08-07 | 2017-11-21 | 西南石油大学 | A kind of multichannel water hole cavitation experimental provision |
| CN109299571A (en) * | 2018-10-25 | 2019-02-01 | 内蒙古科技大学 | A kind of design method of the Tuned Liquid based on structural fire protection water tank |
| CN113495010A (en) * | 2020-03-20 | 2021-10-12 | 上海微电子装备（集团）股份有限公司 | Disturbance force generating device and method |
| CN113495010B (en) * | 2020-03-20 | 2023-04-07 | 上海微电子装备（集团）股份有限公司 | Disturbance force generating device and method |
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| CN102678688B (en) | 2014-10-15 |
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