CN102445391B - Pressure pulse fatigue testing device for directly generating pulses with plunger pump - Google Patents
Pressure pulse fatigue testing device for directly generating pulses with plunger pump Download PDFInfo
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- CN102445391B CN102445391B CN 201110301343 CN201110301343A CN102445391B CN 102445391 B CN102445391 B CN 102445391B CN 201110301343 CN201110301343 CN 201110301343 CN 201110301343 A CN201110301343 A CN 201110301343A CN 102445391 B CN102445391 B CN 102445391B
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Abstract
The invention discloses a heat exchanger pressure pulse fatigue testing device for directly generating pulses with a plunger pump. The fatigue testing device comprises a liquid tank (1), an electric heater (2), a liquid pump (3), an isolating valve (4), a needle valve (5), a back pressure valve (6), a radiator (7) and a filter group (8), and is characterized in that: the liquid pump (3) is a plunger type metering liquid pump; the outlet of the plunger type metering liquid pump is not provided with any one-way valve; the inlet of the liquid pump is connected with the outlet of the liquid tank through a front liquid pump filter, the electric heater and the isolating valve; the outlet of the liquid pump is connected with the inlet of a test piece (9) through a back liquid pump filter; and the outlet of the test piece is connected with the inlet of the liquid tank through a back test piece filter, the needle valve, the back pressure valve and the radiator. The fatigue testing device has the advantages of trapezoidal pulse waveform, simple system, long service life, convenience for adjusting, safety, reliability and the like.
Description
Technical field
The present invention relates to a kind of pressure pulse fatigue experimental device, especially for a kind of pressure pulse fatigue experimental device that is directly produced pulse by ram pump of heat interchanger.
Background technology
The pressure pulse fatigue experimental device is one of main test unit of heat interchanger strength character test, and the scheme of generation pressure pulse commonly used is electromagnetism or electronic control valve and mechanical four-way valve at present.The system configuration of these two kinds of schemes is more complicated all, needs to produce the pressure stable source with liquid pump earlier, switches by valve then or rotate to produce pressure pulse; Because electromagnetism or electronic control valve are lower serviceable life, even the serviceable life of imported product also can be very not long; And the automaticity of mechanical four-way valve is not high.
Summary of the invention
The invention provides a kind of reliable more and simple possible of existing other scheme of mentality of designing ratio of utilizing plunger type metering liquid pump to produce pressure pulse.
The present invention adopts following technical scheme:
A kind ofly directly produce the heat interchanger pressure pulse fatigue experimental device of pulse by ram pump, comprise liquid case, electric heater, liquid pump, isolation valve, needle-valve, counterbalance valve, heating radiator, filter set; Wherein filter set comprises liquid pump front filter, liquid pump after-filter and testpieces after-filter; It is characterized in that liquid pump is plunger type metering pump; The entrance of liquid pump passes through the liquid pump front filter successively, the outlet with the liquid case is connected electric heater with isolation valve, the outlet of liquid pump is connected with the entrance of testpieces by the liquid pump after-filter, the outlet of testpieces is connected with the entrance of counterbalance valve by testpieces after-filter, needle-valve successively, and the outlet of counterbalance valve is connected by the entrance of heating radiator with the liquid case.
Compared with prior art, the present invention has following advantage:
1. can reach more than one hundred million times the serviceable life of the plunger type metering liquid pump of the present invention program's employing, the pressure pulse regulation scope is also mated with the demand of heat interchanger pressure pulse test unit.
2. because retaining valve is not installed in the outlet of plunger type metering liquid pump, testpieces is connected with the cylinder body chamber of liquid pump, therefore the imbibition process of plunger type metering liquid pump can make the low ebb of sine pulse waveform fill and lead up, and also the top of sine pulse waveform can be scabbled in the scheme that testpieces discharge pipe series connection needle-valve adds counterbalance valve, make the pressure pulse waveform more close to the desirable trapezoidal pulse waveform of pressure pulse torture test; And the slope of trapezoidal pulse waveform can change by the stroke of manual adjustments plunger type metering liquid pump; The structure of using needle-valve to add counterbalance valve is that the adjusting of needle-valve is then more convenient, so available counterbalance valve coarse adjustment because the adjusting of counterbalance valve relatively bothers, use the needle-valve fine tuning, simultaneously, the pulsatile impact power that the throttling action of needle-valve can make counterbalance valve be subjected to reduces, thereby prolongs its serviceable life.
3. the rotating speed that adopts converter technique pilot plunger formula to measure liquid pump is realized the adjusting of pressure pulse frequency, adopt manual stroke to regulate the liquid supply rate of control plunger type metering liquid pump, also have the manual adjustments needle-valve to add the means of the comprehensive adjustment circulating pressure of counterbalance valve simultaneously, the trace of top pressure is regulated and can be compensated by automatic micro-regulating impulse frequency behind the balance movement, thereby can revise the drift of regulating the pressure pulse high pressure that may cause because of variation of ambient temperature under the unmanned condition automatically.
4. because the liquid supply rate of plunger type metering liquid pump is accurate, easy to adjust, use safer.
Description of drawings
Fig. 1 is the system flow synoptic diagram of the embodiment of the invention 1.
Embodiment
Embodiment 1Referring to Fig. 1, a kind ofly directly produce the heat interchanger pressure pulse fatigue experimental device of pulse by ram pump, comprise liquid case 1, electric heater 2, liquid pump 3, isolation valve 4, needle-valve 5, counterbalance valve 6, heating radiator 7, filter set 8; Wherein filter set 8 comprises liquid pump front filter 8-1, liquid pump after-filter 8-2 and testpieces after-filter 8-3; Liquid pump 3 is plunger type metering pump; The entrance of liquid pump passes through liquid pump front filter 8-1 successively, the outlet with liquid case 1 is connected electric heater 2 with isolation valve 4, the outlet of liquid pump is connected with the entrance of testpieces 9 by liquid pump after-filter 8-2, retaining valve is not adorned in the outlet that is plunger type metering pump, the outlet of testpieces 9 is connected with the entrance of counterbalance valve 6 by testpieces after-filter 8-3, needle-valve 5 successively, and the outlet of counterbalance valve 6 is connected with the entrance of liquid case 1 by heating radiator 7.
Pressure pulse fatigue experimental device workflow is as follows, plunger type metering liquid pump by electric heater from the imbibition of liquid case, the imbibition process can make the low ebb of pulse waveform fill and lead up, the highly pressurised liquid of discharging enters in the testpieces, its pressure is raise, have the needle-valve of series connection to add counterbalance valve at the testpieces discharge pipe, the top of sinusoidal pressure pulse waveform can be scabbled, the counterbalance valve outlet links to each other with the liquid case by heating radiator; Import and export at the outlet of liquid case and testpieces all are provided with filtrator, and the effect of filtrator is to avoid the aluminium bits in the testpieces to enter system circuit; The spool of the outlet retaining valve of plunger type metering liquid pump is removed, and when the semiperiod of plunger liquid pump at feed flow, testpieces boosts; And in the semiperiod of plunger liquid pump plunger backhaul, the testpieces fast pressure relief, plunger liquid pump inlet check valve is opened imbibition, replenishes the liquid measure by counterbalance valve stream liquid-return box.The existence of counterbalance valve can be so that working medium circulates, and the heating by electric heater or the cooling of heating radiator keep the working temperature of testpieces.
Claims (1)
1. one kind directly produces the heat interchanger pressure pulse fatigue experimental device of pulse by ram pump, comprises liquid case (1), electric heater (2), liquid pump (3), isolation valve (4), needle-valve (5), counterbalance valve (6), heating radiator (7), filter set (8); Wherein filter set (8) comprises liquid pump front filter (8-1), liquid pump after-filter (8-2) and testpieces after-filter (8-3); It is characterized in that liquid pump (3) is plunger type metering pump, described plunger type metering pump is for only being provided with the plunger type metering pump of retaining valve at the pump intake place; The entrance of liquid pump is successively by liquid pump front filter (8-1), outlet with liquid case (1) is connected electric heater (2) with isolation valve (4), the outlet of liquid pump is connected with the entrance of testpieces (9) by liquid pump after-filter (8-2), the outlet of testpieces (9) is successively by testpieces after-filter (8-3), needle-valve (5) is connected with the entrance of counterbalance valve (6), the outlet of counterbalance valve (6) is connected with the entrance of liquid case (1) by heating radiator (7), testpieces is connected with the cylinder body chamber of liquid pump, the imbibition process of plunger type metering liquid pump can make the low ebb of sine pulse waveform fill and lead up, and also the top of sine pulse waveform can be scabbled in the scheme that testpieces discharge pipe series connection needle-valve adds counterbalance valve, make the pressure pulse waveform more close to the desirable trapezoidal pulse waveform of pressure pulse torture test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110301343 CN102445391B (en) | 2011-10-09 | 2011-10-09 | Pressure pulse fatigue testing device for directly generating pulses with plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110301343 CN102445391B (en) | 2011-10-09 | 2011-10-09 | Pressure pulse fatigue testing device for directly generating pulses with plunger pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102445391A CN102445391A (en) | 2012-05-09 |
| CN102445391B true CN102445391B (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110301343 Expired - Fee Related CN102445391B (en) | 2011-10-09 | 2011-10-09 | Pressure pulse fatigue testing device for directly generating pulses with plunger pump |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423877B (en) * | 2013-08-06 | 2015-08-26 | 浙江大学 | The pulse detection system of inner container of electric water heater and low consumption detection method |
| CN105021378B (en) * | 2014-04-21 | 2017-11-24 | 上海汽车集团股份有限公司 | The experimental rig of pressure filter lid pressure pulse test |
| CN106769066B (en) * | 2017-01-12 | 2023-11-17 | 无锡帕捷科技有限公司 | Pulse pressure generator and pulse pressure testing device |
| CN108375501B (en) * | 2018-01-25 | 2021-04-16 | 南京理工大学 | Data processing method based on separated Hopkinson pressure bar experiment technology |
| CN108956108B (en) * | 2018-05-21 | 2020-04-14 | 芜湖优能自动化设备有限公司 | Pressure regulating detector for pressure valve |
| CN109470556B (en) * | 2018-12-27 | 2020-11-10 | 北京航空航天大学 | Pressure conveying system for fatigue test of ventricular septal defect occluder |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3292789B2 (en) * | 1995-03-30 | 2002-06-17 | 東京瓦斯株式会社 | High-temperature damage durability evaluation method and apparatus |
| CN1563936A (en) * | 2004-03-30 | 2005-01-12 | 上海理工大学 | heat impact testing method for testing service life of heat exchanger |
| CN201184860Y (en) * | 2008-04-10 | 2009-01-21 | 无锡市冠云换热器有限公司 | Pressure weariness test stand for heat exchanger |
| CN201184862Y (en) * | 2008-04-10 | 2009-01-21 | 无锡市冠云换热器有限公司 | Test stand for thermal fatigue of heat exchanger |
| CN202305338U (en) * | 2011-10-09 | 2012-07-04 | 东南大学 | Fatigue test device for pressure pulse directly generated by plunger pump |
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2011
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| CN102445391A (en) | 2012-05-09 |
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