CN105651486B - Fluid induced heat exchanger tube vibration test test system - Google Patents
Fluid induced heat exchanger tube vibration test test system Download PDFInfo
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- CN105651486B CN105651486B CN201610157043.XA CN201610157043A CN105651486B CN 105651486 B CN105651486 B CN 105651486B CN 201610157043 A CN201610157043 A CN 201610157043A CN 105651486 B CN105651486 B CN 105651486B
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- Prior art keywords
- heat exchanger
- exchanger tube
- inlet
- thread insert
- steel wire
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of fluid induced heat exchanger tube vibration test test system.The system is mainly formed by connecting by inlet part, experimental part and spout member.Two imports of inlet part are connected with the compressor of supply gas and the centrifugal pump of supply liquid respectively, and the top of inlet part is air and liquid mixer, and bottom is diffusion chamber；Enter storage tank from the liquid or gas-liquid mixture of spout member outflow, the outlet of storage tank is connected with the import of centrifugal pump；Experimental part has replaceable tube sheet and tube bank, and to realize the experiment of a variety of tube banks, experimental part inlet and outlet are equipped with pressure gauge, and wall is provided with the incoming end of double conducting probes and dynamic strain measurement instrument, and both output ends are connected with computer.The present invention can be to different arrangement modes, lay ratio and tubing tube bank single-phase and two phase flow carried out under different operating parameter induce heat exchanger tube vibration experiment, obtain the parameters such as critical flow velocity, amplitude and damping, evaluate the vibration characteristics under various operating modes.
Description
Technical field
The present invention relates to heat exchanger tube vibration test test system, more particularly to a kind of fluid induced heat exchanger tube to shake
Dynamic test test system.
Background technology
In process industrial, most of technical process all with heat, cool down and be incubated it is relevant, in order to realize technique thing
Heat transfer between material, people frequently with various types of heat exchangers, it be chemical industry, oil, food, power, metallurgy, pharmacy and
Wide variety of process equipment in nuclear power industry.Wherein, the application of shell-and-tube heat exchanger is particularly extensive, in shell-and-tube heat exchanger
In, due to the setting of deflection plate so that what the tube bank moment in heat exchanger was laterally flowed washes away, easily because fluid induced is shaken
Move and damage inactivation occurs.In the last few years, as the raising of operation flow velocity in heat exchanger and the maximization of equipment develop, therewith
And the heat exchanger flutter failure come also increases year by year with failure accidents so that this kind of phenomenon causes domestic and international project circle to be ground to related
The common concern for the person of studying carefully.The heat exchanger commonly used in industry, such as：Two-phase be present in nuclear boiler, condenser and boiler
Fluid-induced vibration, compared to monophasic fluid induced vibration, two-phase fluid induced vibration is increasingly complex.
So far, flow transversely through the vibration that tube bank induces for one-way fluid, the checking method of existing comparative maturity and
Practical experience.And bundle vibration is induced for two phase flow, still there are some problems demands to probe into.Although there are some to be used to grind
Study carefully the experimental provision that single-phase and two phase flow induces tube bundle vibration, but most of experimental provision can only carry out single-phase flow experiment, only
Least a portion of experimental provision can be used for two phase flow experiment, and with complex operation and can research contents it is single the shortcomings that, have
The experimental provision for closing two phase flow induction tube bundle vibration easy to operate urgently designs.
The content of the invention
It is an object of the invention to provide a kind of fluid induced heat exchanger tube vibration test test system, it is mainly used in surveying
Obtain void fraction, pipe flow speed and heat exchanger tube oscillating curve.The experimental system can not only study tube bank in horizontal stream condition
Under, the influence of void fraction, arrangement mode, lay ratio and tubing to tube bundle vibration, tube bank shaking at cross can also be studied
Dynamic characteristic and critical flow velocity, and then the design of the vibration safety of revision for relevant criterion and heat exchanger provides reference.
The technical solution adopted in the present invention is：
System of the present invention is mainly connected in sequence by inlet part, experimental part and spout member；Wherein：
The bottom of inlet part is diffusion chamber, and top is air and liquid mixer；Diffusion chamber lower end is connected with gas distributor, expands
Liquid inlet duct is provided among pressure chamber；Gas distributor is successively through tee ball valve, gas flowmeter and compressor outlet valve and pressure
The outlet of contracting machine is connected；Liquid inlet duct is successively through fluid flowmeter, outlet valve, centrifugal pump, inlet valve and storage tank and spout member
Upper end is connected；
The middle cylinder of experimental part is square-section, is sequentially arranged with from bottom to up in middle cylinder along its length more
Root rigid pipe and multiple flexible units, left and right tube sheet are separately mounted to middle cylinder both sides, and more rigid pipe both ends are installed respectively
In left and right tube sheet each hole；
Every rigid heat exchanger tube both ends in multiple flexible units respectively by left qin steel wire and right qin steel wire with it is respective
Fixed mechanism connects with respective tensioning mechanism；
Foil gauge is pasted on the right qin steel wire of every rigid heat exchanger tube in all measured flexible units and is passed through
Line is connected through test interface end cap with dynamic strain measurement instrument；Double conducting probes are installed at experimental part lower inlet,
The output end of dynamic strain measurement instrument and double conducting probes is connected with computer；The inlet and outlet of experimental part are respectively provided with entrance pressure
Power table and delivery gauge.
The respective fixed mechanism structure is identical, and each fixed mechanism is embedding including bolt of cover, packing ring and left-hand thread
Enter part；The rigid heat exchanger tube left end of left-hand thread insert and flexible unit connects, bolt of cover by packing ring corresponding thereto
Left tubesheet holes is affixed, and left qin steel wire one end is connected with left-hand thread insert, and the left qin steel wire other end passes through the bolt of cover of left end
It is and affixed with bolt of cover.
The respective tensioning mechanism structure is identical, each tensioning mechanism, is embedded in including right-hand thread insert, internal thread
Part and regulating bolt；The rigid heat exchanger tube right-hand member of right-hand thread insert and flexible unit is connected, and drawing is sequentially arranged with the outside of right tube plate
Tight baffle plate and support brace, internal thread insert one end are connected with tensing plate hole, and another stomidium of internal thread insert is built with regulation
Bolt, right qin steel wire one end are connected with right-hand thread insert, and the right qin steel wire other end is through internal thread insert hole and passes through regulation
Bolt-center hole is affixed with regulating bolt, and test interface port lid is housed outside internal thread insert.
The lower inner wall of the middle cylinder is provided with positioning baffle, and positioning baffle contacts with left and right tube sheet bottom surface, it is determined that left
Vertical position of the right tube plate in middle cylinder.
The ripple packing for being easy to air-liquid to mix is filled in the air and liquid mixer, inside.
The measured flexible unit refers to be distributed in the flexible unit among support brace.
The invention has the advantages that：
（1）It is removable connection to be restrained in the experimental system between tube sheet and middle cylinder, can not only be obtained
Tested tube bank vibration characteristics at cross and critical flow velocity, and can study the arrangement mode of tube bank, lay ratio and
Tubing convection body induces the influence of heat exchanger tube vibration.
（2）Flexible tube bank in the experimental system realizes the regulation to restraining intrinsic frequency by screw-driven, this tune
Section method is more stable, simple to operate, it is easy to accomplish.
（3）The experimental system can realize the experiment of single-phase and two phase flow, be easy to contrast between the two.
Brief description of the drawings
Fig. 1 is the principle schematic diagram of the present invention.
Fig. 2 is the principle schematic diagram of single flexible component.
In figure：1st, inlet part, 1.1, gas distributor, 1.2, diffusion chamber, 1.3, air and liquid mixer, 1.4, liquid inlet
Pipe, 2, experimental part, 2.1, positioning baffle, 2.2, left and right tube sheet, 2.3, rigid pipe, 2.4, flexible unit, 2.4.1, end cap spiral shell
Bolt, 2.4.2, left and right qin steel wire, 2.4.3, packing ring, 2.4.4, left and right threaded insert, 2.4.5, rigid heat exchanger tube are 2.4.6, interior
Threaded insert, 2.4.7, regulating bolt, 2.5, middle cylinder, 2.6, test interface end cap, 2.7, foil gauge, 2.8, tense gear
Plate, 2.9, support brace, 3, spout member, 4, storage tank, 5, inlet valve, 6, centrifugal pump, 7, outlet valve, 8, fluid flowmeter, 9, three
Pass ball valve, 10, gas flowmeter, 11, compressor outlet valve, 12, compressor, 13, inlet pressure gauge, 14, delivery gauge,
15th, double conducting probes, 16, computer, 17, dynamic strain measurement instrument.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in figure 1, system of the present invention is mainly connected successively by inlet part 1, experimental part 2 and spout member 3
Connect and form；Wherein：
The overall cross section from top to bottom of inlet part 1 is the square-section tapered into, and its underpart is diffusion chamber 1.2,
Top is air and liquid mixer 1.3；The lower end of diffusion chamber 1.2 is connected with gas distributor 1.1, enters among diffusion chamber 1.2 provided with liquid
Mouth pipe 1.4；Gas distributor 1.1 goes out through tee ball valve 9, gas flowmeter 10 and compressor outlet valve 11 with compressor 12 successively
Mouth is connected；Liquid inlet duct 1.4 is successively through fluid flowmeter 8, outlet valve 7, centrifugal pump 6, inlet valve 5 and storage tank 4 and export department
The upper end of part 3 is connected, and spout member 3 is that overall cross section from top to bottom is the square-section tapered into.
The middle cylinder 2.5 of experimental part 2 is square-section, in middle cylinder 2.5 along its length from bottom to up according to
It is secondary firm equipped with more to be arranged according to certain arrangement mode (such as square or triangle) and lay ratio (such as 19/25 or 25/32)
Property pipe 2.3 and multiple flexible units 2.4, left and right tube sheet 2.2 are separately mounted to the both sides of middle cylinder 2.5, more 2.3 liang of rigid pipes
End is separately mounted in 2.2 respective hole of left and right tube sheet.
As shown in Figure 1 and Figure 2, every rigid heat exchanger tube 2.4.5 both ends in multiple flexible units 2.4 pass through left qin respectively
Steel wire 2.4.2 and right qin steel wire 2.4.2 are connected with respective fixed mechanism and respective tensioning mechanism.
Pasted on the right qin steel wire 2.4.2 of every rigid heat exchanger tube 2.4.5 in all measured flexible units 2.4
Foil gauge 2.7 is simultaneously connected by line through test interface end cap 2.6 with dynamic strain measurement instrument 17；The lower end of experimental part 2 enters
Double conducting probes 15 are installed, the output end of dynamic strain measurement instrument 17 and pair conducting probe 15 is connected with computer 16 at mouthful；
The inlet and outlet of experimental part 2 are respectively provided with inlet pressure gauge 13 and delivery gauge 14.
The respective fixed mechanism structure is identical, and by taking a fixed mechanism as an example, it includes bolt of cover 2.4.1, pad
Enclose 2.4.3 and left-hand thread insert 2.4.4；The rigid heat exchanger tube 2.4.5 left ends of left-hand thread insert 2.4.4 and flexible unit connect
Connect, left tube sheet 2.2 holes of the bolt of cover 2.4.1 by packing ring 2.4.3 corresponding thereto is affixed, left qin steel wire 2.4.2 one end with
The 2.4.4 connections of left-hand thread insert, bolt of cover 2.4.1 and and bolt of cover of the left qin steel wire 2.4.2 other ends through left end
It is 2.4.1 affixed.
The respective tensioning mechanism structure is identical, and by taking a tensioning mechanism as an example, it includes right-hand thread insert
2.4.4, internal thread insert 2.4.6 and regulating bolt 2.4.7；Right-hand thread insert 2.4.4 and flexible unit rigidity heat exchange
Pipe 2.4.5 right-hand members connect, and are sequentially arranged with the outside of right tube plate and tense baffle plate 2.8 and support brace 2.9, internal thread insert 2.4.6 mono-
End is connected with the hole of support brace 2.9, and another stomidiums of internal thread insert 2.4.6 are built with regulating bolt 2.4.7, right qin steel wire
2.4.2 one end is connected with right-hand thread insert 2.4.4, and the right qin steel wire 2.4.2 other ends are through internal thread insert 2.4.6 holes and wear
Overregulate bolt 2.4.7 centre bores and regulating bolt 2.4.7 is affixed, test interface port lid is housed outside internal thread insert 2.4.6
2.6。
The lower inner wall of the middle cylinder 2.5 is provided with positioning baffle 2.1, positioning baffle 2.1 and the left and right bottom of tube sheet 2.2
Face contacts, and determines vertical position of the left and right tube sheet 2.2 in middle cylinder 2.5.
The air and liquid mixer 1.3, inside fill according to the inner wall size of air and liquid mixer 1.3 cutting form it is regular just
In the plastic ripple filler of air-liquid mixing.
The measured flexible unit refers to be distributed in the flexible unit among support brace 2.9.
The operation principle of the present invention is as follows：
（1）Single-phase flow is tested
Using water as medium, the rigid heat exchanger tube 2.4.5 of the stainless steel tube for the square arrangement that lay ratio is 19/25 is surveyed
Have a try and test.Enough water is injected into storage tank 4 using external source, opens the inlet valve 5 of centrifugal pump 6, and slowly open centrifugation
The outlet valve 7 of pump 6, water is full of whole experimental provision.Then the outlet valve 7 for adjusting centrifugal pump 6 causes the reading of fluid flowmeter 8
Number is 8m3/ h, and the signal curve measured by dynamic strain measurement instrument 17 is observed, it is firm according to resulting intrinsic frequency, turn
Property heat exchanger tube 2.4.5 right-hand members regulating bolt 2.4.7, all measured heat exchanger tubes (are measured by left and right qin steel wire
Flexible pipe) intrinsic frequency be finely adjusted, make its identical.Afterwards, the outlet valve 7 of centrifugal pump 6 is adjusted, gradually changes flow,
After fluid flowmeter 8 and the stable reading of inlet pressure gauge 13 and delivery gauge 14, preserve dynamic under 15 different flows
Signal curve measured by state strain gauge 17 and the amplitude according to the measured flexible tube vibration of its acquisition and damping, and root
Amplitude and flow velocity obtained by upper according to this obtain critical flow velocity by mapping.Finally, outlet valve 5 and inlet valve 7 are closed, and by three
Pass ball valve 9 is opened, and discharges the water remained in experimental provision.
（2）Two phase flow is tested
Using water and air as medium, the flow of water is 8m3/ h, the stainless steel tube for the square arrangement that lay ratio is 19/25
Rigid heat exchanger tube 2.4.5 carry out testing experiment.Enough water is injected into storage tank 4 using external source, opens centrifugal pump 6
Inlet valve 5, and the outlet valve 7 of centrifugal pump 6 is slowly opened, water is full of by whole experimental provision with relatively low flow.Then adjust
Outlet valve 7 and compressor outlet valve 11 so that the reading of the and gas flow meter 10 of fluid flowmeter 8 is respectively 8m3/ h and 4m3/ h,
And the signal curve measured by dynamic strain measurement instrument 17 is observed, according to resulting intrinsic frequency, turn rigidity heat exchanger tube
2.4.5 the regulating bolt 2.4.7 of right-hand member, by left and right qin steel wire to all measured heat exchanger tubes (i.e. measured flexible pipe)
Intrinsic frequency be finely adjusted, make its identical.Afterwards, keep the flow of water constant, gradually change the flow of air, treat gas stream
After gauge 10 and the stable reading of inlet pressure gauge 13 and delivery gauge 14, the gas under 10 different void fractions is recorded respectively
The reading of flowmeter 10, inlet pressure gauge 13 and delivery gauge 14, preserve the signature tune measured by dynamic strain measurement instrument 17
Line and the amplitude according to the measured flexible tube vibration of its acquisition and damping, and according to it is obtained as above to amplitude and flow velocity pass through
Mapping obtains critical flow velocity.Finally, inlet valve 5 and outlet valve 7 and compressor outlet valve 11 are closed, and tee ball valve 9 is beaten
Open, discharge the water remained in experimental provision.
Claims (6)
- A kind of 1. fluid induced heat exchanger tube vibration test test system, it is characterised in that：The system is mainly by inlet part （1）, experimental part（2）And spout member（3）It is connected in sequence；Wherein：Inlet part（1）Bottom be diffusion chamber（1.2）, top is air and liquid mixer（1.3）；Diffusion chamber（1.2）Lower end and gas Body distributor（1.1）It is connected, diffusion chamber（1.2）Centre is provided with liquid inlet duct（1.4）；Gas distributor（1.1）Successively through three Pass ball valve（9）, gas flowmeter（10）With compressor outlet valve（11）With compressor（12）Outlet is connected；Liquid inlet duct （1.4）Successively through fluid flowmeter（8）, outlet valve（7）, centrifugal pump（6）, inlet valve（5）And storage tank（4）With spout member（3） Upper end is connected；Experimental part（2）Middle cylinder（2.5）For square-section, middle cylinder along its length（2.5）From bottom to up inside It is sequentially arranged with more rigid pipes（2.3）With multiple flexible units, left and right tube sheet is separately mounted to middle cylinder（2.5）Both sides, it is more Root rigid pipe（2.3）Both ends are separately mounted to left and right tube sheet each in hole；Every rigid heat exchanger tube both ends in multiple flexible units pass through left qin steel wire and right qin steel wire and respective fixation respectively Mechanism connects with respective tensioning mechanism；Foil gauge is pasted on the right qin steel wire of every rigid heat exchanger tube in all measured flexible units and passes through line Through test interface end cap（2.6）With dynamic strain measurement instrument（17）It is connected；Experimental part（2）Double electricity are installed at lower inlet Lead probe（15）, dynamic strain measurement instrument（17）With double conducting probes（15）Output end and computer（16）It is connected；Experiment portion Part（2）Inlet and outlet be respectively provided with inlet pressure gauge（13）And delivery gauge（14）.
- A kind of 2. fluid induced heat exchanger tube vibration test test system according to claim 1, it is characterised in that：Institute It is identical to state respective fixed mechanism structure, each fixed mechanism, including bolt of cover（2.4.1）, packing ring（2.4.3）With left spiral shell Line insert；The rigid heat exchanger tube left end of left-hand thread insert and flexible unit connects, bolt of cover（2.4.1）Pass through packing ring （2.4.3）Left tubesheet holes corresponding thereto is affixed, left qin steel wire one end and left-hand thread insert（2.4.4）Connection, Zuo Qingang The line other end passes through the bolt of cover of left end（2.4.1）And and bolt of cover（2.4.1）It is affixed.
- A kind of 3. fluid induced heat exchanger tube vibration test test system according to claim 1, it is characterised in that：Institute It is identical to state respective tensioning mechanism structure, each tensioning mechanism, including right-hand thread insert, internal thread insert（2.4.6） And regulating bolt（2.4.7）；The rigid heat exchanger tube right-hand member of right-hand thread insert and flexible unit connects, and is filled successively on the outside of right tube plate There is tension baffle plate（2.8）And support brace（2.9）, internal thread insert（2.4.6）One end and support brace（2.9）Hole connects, interior spiral shell Line insert（2.4.6）Another stomidium is built with regulating bolt（2.4.7）, right qin steel wire one end is connected with right-hand thread insert, The right qin steel wire other end is through internal thread insert（2.4.6）Hole simultaneously passes through regulating bolt（2.4.7）Centre bore and regulating bolt （2.4.7）It is affixed, internal thread insert（2.4.6）Test interface port lid is housed outside（2.6）.
- A kind of 4. fluid induced heat exchanger tube vibration test test system according to claim 1, it is characterised in that：Institute State middle cylinder（2.5）Lower inner wall be provided with positioning baffle（2.1）, positioning baffle（2.1）With left and right tube sheet（2.2）Bottom surface Contact, determines left and right tube sheet（2.2）In middle cylinder（2.5）In vertical position.
- A kind of 5. fluid induced heat exchanger tube vibration test test system according to claim 1, it is characterised in that：Institute State air and liquid mixer（1.3）, the ripple packing for being easy to air-liquid to mix is filled in inside.
- A kind of 6. fluid induced heat exchanger tube vibration test test system according to claim 1, it is characterised in that：Institute Measured flexible unit is stated to refer to be distributed in support brace（2.9）Middle flexible unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610157043.XA CN105651486B (en) | 2016-03-18 | 2016-03-18 | Fluid induced heat exchanger tube vibration test test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610157043.XA CN105651486B (en) | 2016-03-18 | 2016-03-18 | Fluid induced heat exchanger tube vibration test test system |
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| Publication Number | Publication Date |
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| CN105651486A CN105651486A (en) | 2016-06-08 |
| CN105651486B true CN105651486B (en) | 2017-11-17 |
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| CN201610157043.XA Expired - Fee Related CN105651486B (en) | 2016-03-18 | 2016-03-18 | Fluid induced heat exchanger tube vibration test test system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769126A (en) * | 2016-11-28 | 2017-05-31 | 华南理工大学 | A kind of controllable pressure herringbone corrugated lamella heat exchanger stress-strain test system |
| CN107941457B (en) * | 2017-11-24 | 2019-05-10 | 西南石油大学 | A kind of tube bundle flow consolidates Coupled Dynamics vibration testing device and method |
| CN111665073B (en) * | 2020-07-20 | 2021-12-17 | 山东博然电力科技有限公司 | Test equipment with multi-direction observation gas-water heat exchanger |
| CN113375899B (en) * | 2021-05-14 | 2023-05-12 | 东方电气集团科学技术研究院有限公司 | Stress strain testing method for flow-induced vibration of tube bundle structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02300632A (en) * | 1989-05-15 | 1990-12-12 | Tlv Co Ltd | Vortex type two-phase flow measuring instrument |
| JP2010271074A (en) * | 2009-05-19 | 2010-12-02 | Mitsubishi Heavy Ind Ltd | Two-phase flow exciting force evaluation method and two-phase flow exciting force evaluation device |
| CN103512717A (en) * | 2013-09-26 | 2014-01-15 | 中国石油集团工程设计有限责任公司 | Method for predicting bundle vibration of large low-temperature evaporator under two-phase flow effect |
| CN103592094B (en) * | 2013-11-25 | 2017-05-24 | 东北石油大学 | Experimental method for flow-induced vibration of tube bundle |
| CN104019955B (en) * | 2014-05-30 | 2016-05-04 | 西安交通大学 | Shell-and-tube steam generator stream-liquid two-phase flow simulation system and analogy method |
| CN205449435U (en) * | 2016-03-18 | 2016-08-10 | 浙江大学 | Fluid brings out heat exchanger tube vibration test test system |
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Granted publication date: 20171117 |