CN205449435U - Fluid brings out heat exchanger tube vibration test test system - Google Patents
Fluid brings out heat exchanger tube vibration test test system Download PDFInfo
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- CN205449435U CN205449435U CN201620212362.1U CN201620212362U CN205449435U CN 205449435 U CN205449435 U CN 205449435U CN 201620212362 U CN201620212362 U CN 201620212362U CN 205449435 U CN205449435 U CN 205449435U
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- heat exchanger
- exchanger tube
- thread insert
- steel wire
- test system
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Abstract
The utility model discloses a fluid brings out heat exchanger tube vibration test test system. This system mainly is formed by connecting entry parts, experiment parts and export parts. Two imports of entry part link to each other with the centrifugal pump of supplying with gaseous compressor and supplying with liquid respectively, and the upper portion of entry part is gas -liquid mixer, and the lower part is the diffusion chamber, the liquid or the gas -liquid mixture thing that flow out from the export parts get into the storage tank, and the export of storage tank links to each other with the import of centrifugal pump, the experiment part has removable tube sheet and tube bank to realize the experiment of multiple tube bank, the experiment part is imported and exported and is equipped with the manometer, is equipped with the incoming end of two conducting probes and dynamic straingauging appearance on the wall, and output between them links to each other with the computer. The utility model discloses can to different arrangement, pitch diameter than and the tube bank of tubular product carries on single -phasely under the different operating parameters and the two -phase flow brings out heat exchanger tube vibration experiment, obtain critical flow velocity, amplitude and damping isoparametric, assess the vibration characteristic under the various operating modes.
Description
Technical field
This utility model relates to heat exchanger tube vibration test test system, particularly relates to a kind of fluid induced heat exchanger tube vibration test test system.
Background technology
In process industrial, most of technical process all with heating, cool down and be incubated relevant, in order to realize the heat transmission between process stream, people are frequently with various types of heat exchangers, and it is wide variety of process equipment in chemical industry, oil, food, power, metallurgy, pharmacy and nuclear power industry.Wherein, the application of shell-and-tube heat exchanger is particularly extensive, in shell-and-tube heat exchanger, due to the setting of deflection plate so that the tube bank moment in heat exchanger is washed away by laterally stream, and damage inactivation easily occurs due to fluid-induced vibration.In the last few years, along with the maximization development of the raising and equipment operating flow velocity in heat exchanger, thing followed heat exchanger flutter failure increased the most year by year with failure accidents so that this kind of phenomenon causes the common concern of domestic and international project circle and correlational study person.Heat exchanger conventional in industry, such as: all there is two-phase fluid induced vibration in nuclear boiler, condenser and boiler, compares monophasic fluid induced vibration, and two-phase fluid induced vibration is increasingly complex.
Up to now, one-way fluid is flowed transversely through to the vibration of tube bank induction, the checking method of existing comparative maturity and practical experience.And bundle vibration is induced for two phase flow, still there are some problems demand to probe into.Although having there are some for studying the single-phase and experimental provision of two phase flow induction tube bundle vibration, but major part experimental provision can only carry out single-phase flow experiment, the most least a portion of experimental provision may be used for two phase flow experiment, and have operation complicated and can the single shortcoming of research contents, the experimental provision that relevant two phase flow easy and simple to handle induces tube bundle vibration urgently designs.
Utility model content
The purpose of this utility model is to provide a kind of fluid induced heat exchanger tube vibration test test system, is mainly used in recording void fraction, pipe flow speed and heat exchanger tube oscillating curve.This experimental system is possible not only to research tube bank under the conditions of laterally stream, the impact on tube bundle vibration of void fraction, arrangement mode, lay ratio and tubing, the vibration characteristics and critical flow velocity restrained at cross can also be studied, and then provide reference for the revision of relevant criterion and the vibration safety design of heat exchanger.
This utility model be the technical scheme is that
System described in the utility model 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；Lower end, diffusion chamber is connected with gas distributor, and diffusion is provided with liquid inlet duct in the middle of chamber；Gas distributor is connected with compressor outlet with compressor outlet valve through tee ball valve, gas flowmeter successively；Liquid inlet duct is connected with spout member upper end through fluid flowmeter, outlet valve, centrifugal pump, inlet valve and storage tank successively；
The middle cylinder of experimental part is square-section, many rigid pipes and multiple flexible unit it is sequentially arranged with from bottom to up in middle cylinder along its length, left and right tube sheet is separately mounted to middle cylinder both sides, and many rigid pipe two ends are separately mounted in left and right tube sheet each hole；
Every rigidity heat exchanger tube two ends in multiple flexible units are connected with respective fixed mechanism and respective tensioning mechanism by left qin steel wire and right qin steel wire respectively；
All paste foil gauge on the right qin steel wire of every rigidity heat exchanger tube in all measured flexible units and be connected with dynamic strain measurement instrument through test interface end cap by line；Being provided with double conducting probe at experimental part lower inlet, dynamic strain measurement instrument is connected with computer with the outfan of double conducting probes；The import and export of experimental part are respectively provided with inlet pressure gauge and delivery gauge.
Described respective fixed mechanism structure is identical, and each fixed mechanism all includes bolt of cover, packing ring and left-hand thread insert；Left-hand thread insert is connected with the rigidity heat exchanger tube left end of flexible unit, bolt of cover is affixed by packing ring left tubesheet holes corresponding thereto, left qin steel wire one end is connected with left-hand thread insert, and the left qin steel wire other end is through the bolt of cover of left end affixed with bolt of cover.
Described respective tensioning mechanism structure is identical, and each tensioning mechanism all includes left-hand thread insert, female thread insert and adjusting nut；Left-hand thread insert is connected with the rigidity heat exchanger tube right-hand member of flexible unit, tension baffle plate and support brace it is sequentially arranged with outside right tube plate, female thread insert one end is connected with tension plate hole, another stomidium of female thread insert is built with adjusting nut, right qin steel wire one end is connected with right-hand thread insert, the right qin steel wire other end embeds piece bores affixed with adjusting nut through adjusting nut centre bore through female thread, and female thread insert is outward equipped with test interface port lid.
The lower inner wall of described middle cylinder is provided with positioning baffle, and positioning baffle contacts with tube sheet bottom surface, left and right, determines left and right tube sheet vertical position in middle cylinder.
Described air and liquid mixer, the ripple packing being easy to air-liquid mixing is filled in inside.
Described measured flexible unit refers to be distributed in the flexible unit in the middle of support brace.
This utility model has the beneficial effect that
(1) this experimental system restrained and between tube sheet and middle cylinder, be removable connection, it is possible not only to obtain tested tube bank vibration characteristics at cross and critical flow velocity, and the arrangement mode of tube bank, lay ratio and the impact of tubing convection cell induction heat exchanger tube vibration can be studied.
(2) the flexible tube bank in this experimental system realizes the regulation to tube bank natural frequency by screw-driven, and this control method is more stable, simple to operate, it is easy to accomplish.
(3) this experimental system can realize single-phase and two phase flow experiment, it is easy to contrast between the two.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present utility model.
Fig. 2 is the structural principle schematic diagram of single flexible assembly.
nullIn figure: 1、Inlet part，1.1、Gas distributor，1.2、Diffusion chamber，1.3、Air and liquid mixer，1.4、Liquid inlet duct，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、Bolt of cover，2.4.2、Left and right qin steel wire，2.4.3、Packing ring，2.4.4、Threaded insert，2.4.5、Rigidity heat exchanger tube，2.4.6、Female thread insert，2.4.7、Adjusting nut，2.5、Middle cylinder，2.6、Test interface end cap，2.7、Foil gauge，2.8、Tension baffle plate，2.9、Support brace，3、Spout member，4、Storage tank，5、Inlet valve，6、Centrifugal pump，7、Outlet valve，8、Fluid flowmeter，9、Tee ball valve，10、Gas flowmeter，11、Compressor outlet valve，12、Compressor，13、Inlet pressure gauge，14、Delivery gauge，15、Double conducting probes，16、Computer，17、Dynamic strain measurement instrument.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, system described in the utility model is mainly connected in sequence by inlet part 1, experimental part 2 and spout member 3；Wherein:
Inlet part 1 entirety cross section from top to bottom is the square-section tapered into, and its underpart is diffusion chamber 1.2, and top is air and liquid mixer 1.3；Lower end, diffusion chamber 1.2 is connected with gas distributor 1.1, is provided with liquid inlet duct 1.4 in the middle of diffusion chamber 1.2；Gas distributor 1.1 is connected with compressor 12 outlet through tee ball valve 9, gas flowmeter 10 and compressor outlet valve 11 successively；Liquid inlet duct 1.4 is connected with spout member 3 upper end through fluid flowmeter 8, outlet valve 7, centrifugal pump 6, inlet valve 5 and storage tank 4 successively, spout member 3 be overall cross section from top to bottom be the square-section tapered into.
The middle cylinder 2.5 of experimental part 2 is square-section, the many rigid pipes 2.3 and multiple flexible unit 2.4 arranged according to certain arrangement mode (such as square or triangle) and lay ratio (such as 19/25 or 25/32) it are sequentially arranged with from bottom to up in middle cylinder 2.5 along its length, left and right tube sheet 2.2 is separately mounted to middle cylinder 2.5 both sides, and many rigid pipe 2.3 two ends are separately mounted in the respective hole of left and right tube sheet 2.2.
As shown in Figure 1 and Figure 2, every rigidity heat exchanger tube 2.4.5 two ends in multiple flexible units 2.4 are connected with respective fixed mechanism and respective tensioning mechanism by left qin steel wire 2.4.2 and right qin steel wire 2.4.2 respectively.
All paste foil gauge 2.7 on the right qin steel wire 2.4.2 of every rigidity heat exchanger tube 2.4.5 in all measured flexible units 2.4 and be connected with dynamic strain measurement instrument 17 through test interface end cap 2.6 by line；Being provided with double conducting probe 15 at experimental part 2 lower inlet, dynamic strain measurement instrument 17 is connected with computer 16 with the outfan of double conducting probes 15；The import and export of experimental part 2 are respectively provided with inlet pressure gauge 13 and delivery gauge 14.
Described respective fixed mechanism structure is identical, and as a example by a fixed mechanism, it includes bolt of cover 2.4.1, packing ring 2.4.3 and left-hand thread insert 2.4.4；Left-hand thread insert 2.4.4 is connected with the rigidity heat exchanger tube 2.4.5 left end of flexible unit, bolt of cover 2.4.1 is affixed by packing ring 2.4.3 left tube sheet 2.2 hole corresponding thereto, left qin steel wire 2.4.2 one end is connected with left-hand thread insert 2.4.4, and the left qin steel wire 2.4.2 other end is through the bolt of cover 2.4.1 of left end affixed with bolt of cover 2.4.1.
Described respective tensioning mechanism structure is identical, and as a example by a tensioning mechanism, it includes left-hand thread insert 2.4.4, female thread insert 2.4.6 and adjusting nut 2.4.7；Left-hand thread insert 2.4.4 is connected with the rigidity heat exchanger tube 2.4.5 right-hand member of flexible unit, tension baffle plate 2.8 and support brace 2.9 it is sequentially arranged with outside right tube plate, female thread insert 2.4.6 one end is connected with support brace 2.9 hole, female thread another stomidium of insert 2.4.6 is built with adjusting nut 2.4.7, right qin steel wire 2.4.2 one end is connected with right-hand thread insert 2.4.4, the right qin steel wire 2.4.2 other end is through female thread insert 2.4.6 hole affixed with adjusting nut 2.4.7 through adjusting nut 2.4.7 centre bore, and female thread insert 2.4.6 is outward equipped with test interface port lid 2.6.
The lower inner wall of described middle cylinder 2.5 is provided with positioning baffle 2.1, and positioning baffle 2.1 contacts with left and right tube sheet 2.2 bottom surface, determines the left and right tube sheet 2.2 vertical position in middle cylinder 2.5.
Described air and liquid mixer 1.3, the regular plastic ripple filler being easy to air-liquid mixing according to the cutting of air and liquid mixer 1.3 inner wall size is filled in inside.
Described measured flexible unit refers to be distributed in the flexible unit in the middle of support brace 2.9.
Operation principle of the present utility model is as follows:
(1) single-phase flow experiment
With water as medium, lay ratio is that the rigidity heat exchanger tube 2.4.5 of the stainless steel tube of the square arrangement of 19/25 carries out testing experiment.Utilize external source to inject enough water in storage tank 4, open the inlet valve 5 of centrifugal pump 6, and slowly open the outlet valve 7 of centrifugal pump 6, water is full of whole experimental provision.Then the outlet valve 7 of regulation centrifugal pump 6 makes the reading of fluid flowmeter 8 be 8m3/ h, and observe the signal curve measured by dynamic strain measurement instrument 17, according to obtained natural frequency, the adjusting nut 2.4.7 of turn rigidity heat exchanger tube 2.4.5 right-hand member, by left and right qin steel wire, the natural frequency of all measured heat exchanger tubes (the most measured flexible pipe) is finely adjusted so that it is identical.Afterwards, the outlet valve 7 of regulation centrifugal pump 6, gradually change flow, after the stable reading of fluid flowmeter 8 and inlet pressure gauge 13 and delivery gauge 14, preserve the signal curve measured by dynamic strain measurement instrument 17 under 15 different flows the amplitude obtaining the vibration of measured flexible pipe according to it and damping, and according to obtained as above to amplitude and flow velocity obtain critical flow velocity by mapping.Finally, close outlet valve 5 and inlet valve 7, and tee ball valve 9 is opened, discharge the water of residual in experimental provision.
(2) two phase flow experiment
With water and air as medium, the flow of water is 8m3/ h, lay ratio is that the rigidity heat exchanger tube 2.4.5 of the stainless steel tube of the square arrangement of 19/25 carries out testing experiment.Utilize external source to inject enough water in storage tank 4, open the inlet valve 5 of centrifugal pump 6, and slowly open the outlet valve 7 of centrifugal pump 6, with relatively low flow, water is full of whole experimental provision.Then regulation outlet valve 7 and compressor outlet valve 11 so that the reading of fluid flowmeter 8 and gas flowmeter 10 is respectively 8m3/ h and 4m3/ h, and observe the signal curve measured by dynamic strain measurement instrument 17, according to obtained natural frequency, the adjusting nut 2.4.7 of turn rigidity heat exchanger tube 2.4.5 right-hand member, by left and right qin steel wire, the natural frequency of all measured heat exchanger tubes (the most measured flexible pipe) is finely adjusted so that it is identical.Afterwards, the flow keeping water is constant, gradually change the flow of air, after the stable reading of gas flowmeter 10 and inlet pressure gauge 13 and delivery gauge 14, gas flowmeter 10, inlet pressure gauge 13 and the reading of delivery gauge 14 under 10 different void fractions of record respectively, preserve signal curve measured by dynamic strain measurement instrument 17 amplitude obtaining measured flexible pipe vibration according to it and damping, and according to obtained as above to amplitude and flow velocity obtain critical flow velocity by mapping.Finally, close inlet valve 5 and outlet valve 7 and compressor outlet valve 11, and tee ball valve 9 is opened, discharge the water of residual in experimental provision.
Claims (6)
1. a fluid induced heat exchanger tube vibration test test system, it is characterised in that: this system is mainly connected in sequence by inlet part (1), experimental part (2) and spout member (3)；Wherein:
The bottom of inlet part (1) is diffusion chamber (1.2), and top is air and liquid mixer (1.3)；Diffusion chamber (1.2) lower end is connected with gas distributor (1.1), is provided with liquid inlet duct (1.4) in the middle of diffusion chamber (1.2)；Gas distributor (1.1) is connected with compressor (12) outlet through tee ball valve (9), gas flowmeter (10) and compressor outlet valve (11) successively；Liquid inlet duct (1.4) is connected with spout member (3) upper end with storage tank (4) through fluid flowmeter (8), outlet valve (7), centrifugal pump (6), inlet valve (5) successively；
The middle cylinder (2.5) of experimental part (2) is square-section, many rigid pipes (2.3) and multiple flexible unit it is sequentially arranged with from bottom to up in middle cylinder (2.5) along its length, left and right tube sheet is separately mounted to middle cylinder (2.5) both sides, and many rigid pipe (2.3) two ends are separately mounted in left and right tube sheet each hole；
Every rigidity heat exchanger tube two ends in multiple flexible units are connected with respective fixed mechanism and respective tensioning mechanism by left qin steel wire and right qin steel wire respectively；
All paste foil gauge on the right qin steel wire of every rigidity heat exchanger tube in all measured flexible units and be connected with dynamic strain measurement instrument (17) through test interface end cap (2.6) by line；Being provided with double conducting probe (15) at experimental part (2) lower inlet, dynamic strain measurement instrument (17) is connected with computer (16) with the outfan of double conducting probes (15)；The import and export of experimental part (2) are respectively provided with inlet pressure gauge (13) and delivery gauge (14).
A kind of fluid induced heat exchanger tube vibration test test system the most according to claim 1, it is characterized in that: described respective fixed mechanism structure is identical, each fixed mechanism, all includes bolt of cover (2.4.1), packing ring (2.4.3) and left-hand thread insert；Left-hand thread insert is connected with the rigidity heat exchanger tube left end of flexible unit, bolt of cover (2.4.1) is affixed by packing ring (2.4.3) left tubesheet holes corresponding thereto, left qin steel wire one end is connected with left-hand thread insert (2.4.4), and the left qin steel wire other end is through the bolt of cover (2.4.1) of left end affixed with bolt of cover (2.4.1).
A kind of fluid induced heat exchanger tube vibration test test system the most according to claim 1, it is characterized in that: described respective tensioning mechanism structure is identical, each tensioning mechanism, all includes left-hand thread insert, female thread insert (2.4.6) and adjusting nut (2.4.7)；Left-hand thread insert is connected with the rigidity heat exchanger tube right-hand member of flexible unit, tension baffle plate (2.8) and support brace (2.9) it is sequentially arranged with outside right tube plate, female thread insert (2.4.6) one end is connected with support brace (2.9) hole, female thread insert (2.4.6) another stomidium is built with adjusting nut (2.4.7), right qin steel wire one end is connected with right-hand thread insert, the right qin steel wire other end through female thread insert (2.4.6) hole and through adjusting nut (2.4.7) centre bore affixed with adjusting nut (2.4.7), female thread insert (2.4.6) is outward equipped with test interface port lid (2.6).
A kind of fluid induced heat exchanger tube vibration test test system the most according to claim 1, it is characterized in that: the lower inner wall of described middle cylinder (2.5) is provided with positioning baffle (2.1), positioning baffle (2.1) contacts with left and right tube sheet (2.2) bottom surface, determines the left and right tube sheet (2.2) vertical position in middle cylinder (2.5).
A kind of fluid induced heat exchanger tube vibration test test system the most according to claim 1, it is characterised in that: described air and liquid mixer (1.3), the ripple packing being easy to air-liquid mixing is filled in inside.
A kind of fluid induced heat exchanger tube vibration test test system the most according to claim 1, it is characterised in that: described measured flexible unit refers to be distributed in the flexible unit in the middle of support brace (2.9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620212362.1U CN205449435U (en) | 2016-03-18 | 2016-03-18 | Fluid brings out heat exchanger tube vibration test test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620212362.1U CN205449435U (en) | 2016-03-18 | 2016-03-18 | Fluid brings out heat exchanger tube vibration test test system |
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| Publication Number | Publication Date |
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| CN205449435U true CN205449435U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620212362.1U Withdrawn - After Issue CN205449435U (en) | 2016-03-18 | 2016-03-18 | Fluid brings out heat exchanger tube vibration test test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651486A (en) * | 2016-03-18 | 2016-06-08 | 浙江大学 | Flow-induced heat exchanger tube bundle vibration testing system |
| CN106297527A (en) * | 2016-10-21 | 2017-01-04 | 西南石油大学 | A kind of vertical tube flow pattern of gas-liquid two-phase flow demonstrating experiment device |
-
2016
- 2016-03-18 CN CN201620212362.1U patent/CN205449435U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651486A (en) * | 2016-03-18 | 2016-06-08 | 浙江大学 | Flow-induced heat exchanger tube bundle vibration testing system |
| CN106297527A (en) * | 2016-10-21 | 2017-01-04 | 西南石油大学 | A kind of vertical tube flow pattern of gas-liquid two-phase flow demonstrating experiment device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160810 Effective date of abandoning: 20171117 |
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| AV01 | Patent right actively abandoned |