CN202453314U - Experiment device for jetting, impacting and cooling engine cylinder cover - Google Patents
Experiment device for jetting, impacting and cooling engine cylinder cover Download PDFInfo
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- CN202453314U CN202453314U CN2012200913158U CN201220091315U CN202453314U CN 202453314 U CN202453314 U CN 202453314U CN 2012200913158 U CN2012200913158 U CN 2012200913158U CN 201220091315 U CN201220091315 U CN 201220091315U CN 202453314 U CN202453314 U CN 202453314U
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Abstract
The utility model discloses an experiment device for jetting, impacting and cooling an engine cylinder cover. The main points of the technical scheme include that the experiment device comprises a cylinder cover embedded with a second temperature sensor, a heating piece for heating the cylinder cover, a jetting mechanism for jetting, impacting and cooling the cylinder cover and a data collector for collecting temperature data of the second temperature sensor, wherein the jetting mechanism is provided with a power unit for providing power, the data collector is connected with the power unit, the second temperature sensor and the heating piece, the jetting mechanism comprises a jetting chamber which comprises a jetting chamber outlet and a jetting working medium inlet, a nozzle is arranged at the jetting working medium inlet, and is provided with a jetting hole, the jetting chamber outlet and the jetting working medium inlet are communicated with the jetting hole, and the nozzle is connected with a drive piece for driving the nozzle to move up and down. According to the experiment device, a test mode can be used to test the trend of the influence of the jetting, impacting and cooling technology on heat exchange coefficients of the cylinder cover, so that teaching and scientific research are facilitated.
Description
Technical field
The utility model relates to a kind of experimental provision, and more particularly, it relates to a kind of experimental provision that engine cylinder cover is carried out the jet impulse cooling.
Background technology
The cylinder cap of gasoline engine and diesel engine is one of its main heated element, and reason is that it is the critical piece that constitutes gasoline engine or burning chamber of diesel engine.How more effectively cylinder cap to be cooled off is the necessary condition that guarantees gasoline engine or diesel engine operate as normal.Traditional cooling technology is to take away heat through flowing of liquid coolant in the inner cooling water channel of cylinder cap, but this mode has received the restriction of flow boundary layer, and the potentiality that cooling power further promotes are little.Jet on the other hand; Be a kind of free turbulence of the Gu Bi of nothing constraint in general; This turbulent flow is entrainmented surrounding fluid and then is come through turbulent flow active on the boundary layer and constantly enlarges, and has therefore eliminated the restriction of boundary layer to heat transfer system to a certain extent, more helps conducting heat.
Jet liquid sprays from jet pipe or aperture, breaks away from the constraint of solid boundaries, in liquid or gas, does diffusion and flows, and is called jet.Jet is generally turbulent flow pattern, has the turbulent fluctuation diffusion, can carry out momentum, heat and mass transfer.The jet impulse cooling technology has good instantaneous heat radiation characteristics, all uses to some extent at electronic application and aviation field, does not adopt the jet impulse cooling technology and in the cooling field to engine cylinder cover, also have.And needing relevant experimental provision to the influence of the cylinder cap coefficient of heat transfer, the jet impulse cooling technology verifies.
Summary of the invention
Deficiency to the prior art existence; The utility model is applied to a kind of experimental provision that engine cylinder cover is carried out the jet impulse cooling that cylinder cap is cooled off with the jet impulse cooling technology, and purpose is to adopt the mode of experiment to verify the influence trend of jet impulse cooling technology to the cylinder cap coefficient of heat transfer.
For realizing above-mentioned purpose; The utility model provides following technical scheme: a kind of experimental provision that engine cylinder cover is carried out the jet impulse cooling; The heating member that comprises the cylinder cap that is embedded with second temperature sensor, cylinder cap is heated, cylinder cap is carried out the jet mechanism of jet impulse cooling and the data acquisition unit of gathering the second temperature sensor temperature data; Said jet mechanism is provided with the power unit that power is provided for it, and said data acquisition unit all is connected setting with second temperature sensor, data acquisition unit with heating member with power unit, data acquisition unit.
Through adopting technique scheme; Under the driving of power unit; The heating surface (promptly being provided with the another side of heating member relatively) that jet working medium is preset to cylinder cap through jet mechanism high speed impact; With the heat exchange of heating surface generation jet impulse, working medium carries off heat from heating surface, thereby realizes the cooling (promptly all heating heat are all taken away by jet working medium) of heating surface; The experimental data that the data acquisition unit collection is relevant draws the influence trend of jet impulse cooling technology to the cylinder cap coefficient of heat transfer.
The utility model further is set to: said jet mechanism comprises jet working medium inlet and the jet chamber that conducting connects; The jet chamber includes the outlet of jet chamber; Jet working medium porch is provided with nozzle; Nozzle is provided with jet orifice, and the equal conducting that enters the mouth of jet orifice and the outlet of jet chamber, jet orifice and jet working medium is connected, and nozzle is connected with and drives its actuator that moves up and down.
Through adopting technique scheme; Further confirm the structure of jet mechanism, actuator drives nozzle and moves up and down the effluxvelocity of control jet working medium and flow angle; Jet working medium realizes the cooling of heating surface to the preset heating surface of cylinder cap through the jet orifice high speed impact from jet working medium inlet; Different in flow rate, different angles have different cooling effects, and repeatedly experiment can draw optimum velocity and best angle, thereby realize best cooling effect.
The utility model further is set to: the outlet conducting of jet chamber is connected with fluid reservoir, and fluid reservoir is connected setting with power unit.
Through adopting technique scheme, jet working medium accomplishes cooling work after the outlet of jet chamber flows to fluid reservoir, recycles with realization.
The utility model further is set to: be provided with flowrate control valve between said fluid reservoir and the power unit.
Through adopting technique scheme, the accurately flow of control jet working medium.
The utility model further is set to: the conducting of jet working medium inlet is connected with constant temperature oven; Be provided with first temperature sensor between jet working medium inlet and the constant temperature oven; First temperature sensor is connected setting with data acquisition unit; Constant temperature oven is connected setting with power unit, be provided with liquid mass flow meter between constant temperature oven and the power unit.
Whether accurately through adopting technique scheme, for guaranteeing the constant of jet working medium temperature, the spy has introduced constant temperature oven equipment, for clear and definite temperature constant temperature, be provided with first temperature sensor, for the flow spy who measures jet working medium has introduced liquid mass flow meter.
The utility model further is set to: said cylinder cap is provided with thermal insulation material.
Through adopting technique scheme, thermal insulation material placed remove the remaining surface that is provided with heating member and jet mechanism on the cylinder cap, the heat radiation approach that guarantees whole experiment device is jet mechanism, and experimental data is more accurate.
The utility model further is set to: said heating member is a programmable heater.
Through adopting technique scheme, make in experimentation, to cylinder cap to add heat control easier.
The utility model further is set to: said power unit is an electronic pump.
Through adopting technique scheme, further confirmed to provide the power device of power for jet working medium.
The utility model further is set to: said actuator is a stepper motor.
Through adopting technique scheme, further confirmed to provide the power device of power for nozzle.
Description of drawings
Fig. 1 is a kind of structural representation that engine cylinder cover is carried out the experimental provision embodiment of jet impulse cooling of the utility model;
Fig. 2 is the structural representation of jet mechanism among Fig. 1;
Fig. 3 is the layout synoptic diagram of second temperature sensor in the cylinder cap.
Embodiment
Referring to figs. 1 through Fig. 3 a kind of experimental provision embodiment that engine cylinder cover is carried out jet impulse cooling of the utility model is further specified.
A kind of experimental provision that engine cylinder cover is carried out the jet impulse cooling; Comprise the cylinder cap 1 that is embedded with second temperature sensor 92, (what need explain is the heating member 2 that cylinder cap 1 is heated here; Said heating member 2 is a programmable heater; Make in experimentation, to cylinder cap 1 to add heat control easier), cylinder cap 1 is carried out the jet mechanism 3 of jet impulse cooling and the data acquisition unit 37 of gathering second temperature sensor, 92 temperature datas, said jet mechanism 3 is provided with the power unit 5 that power is provided for it; Said power unit 5 is an electronic pump; Said data acquisition unit 37 and power unit 5, data acquisition unit 37 and second temperature sensor 92, data acquisition unit 37 and heating member 2 all are connected setting, and (what need explain is here, and heating member 2 places a side of cylinder cap 1, and jet mechanism 3 places the opposite side of cylinder cap 1 relative heating member 2; On the cylinder cap 1 except the both sides that are provided with heating member 2 and jet mechanism 3; Other positions are provided with thermal insulation material 4, make the exchange of heat of whole experiment device only come from jet mechanism 3 parts, are embedded with second temperature sensor 92 in the cylinder cap 1; Second temperature sensor 92 is connected with data acquisition unit 37, is used for the required related data of experiments of measuring).
The jet chamber exports 311 conductings and is connected with fluid reservoir 6; Fluid reservoir 6 is connected setting with power unit 5; Be provided with flowrate control valve 7 between fluid reservoir 6 and the power unit 5; 312 conductings that enter the mouth of jet working medium are connected with constant temperature oven 8, and constant temperature oven 8 is connected setting with power unit 5, are provided with first temperature sensor 91 between jet working medium inlet 312 and the constant temperature oven 8.Be provided with liquid mass flow meter 38 between said constant temperature oven 8 and the power unit 5, liquid mass flow meter 38 is connected setting with data acquisition unit 37.
Through adopting technique scheme; Under the driving of the variable-ratio electronic pump of power unit 5; The heating surface (promptly being provided with the another side of heating member 2 relatively) that the jet working medium of different in flow rate is preset to cylinder cap 1 through jet orifice 321 high speed impact from jet working medium inlet 312; With the heat exchange of heating surface generation jet impulse, working medium carries off heat from heating surface, thereby realizes the cooling (being that heating surface is still remaining unchanged through temperature after the external heating) of heating surface; The introducing of constant temperature oven 8 equipment and first temperature sensor 91; Guaranteed the constant of jet working medium temperature, jet working medium accomplishes cooling work after jet chamber outlet 311 flows to fluid reservoir 6, recycles with realization; Test for the flow spy who measures jet working medium has introduced liquid mass flow meter 38, the flow that is arranged so that jet working medium of flowrate control valve 7 can be adjusted.Because cylinder cap intake and exhaust bridge of the nose place is the centrostigma that is heated of whole cylinder cap, this experimental provision especially is fit to the influence of checking jet impulse cooling technology to the cylinder cap intake and exhaust bridge of the nose place coefficient of heat transfer.
Utilize the calculation specifications of above-mentioned experimental provision checking jet impulse cooling technology to the trend that influences of cylinder cap 1 coefficient of heat transfer:
Owing to the existence of thermal insulation material 4 is arranged, can be similar to programmable heater 2 heat transfer problems are reduced to the one dimension heat conduction problem perpendicular to cylinder cap 1.
The heat flow density of supposing well heater 2 is q:
In the above-mentioned formula, Q is the power of programmable heater 2, and A is the surface area of cylinder cap 1.
In the actual computation process, owing to second temperature sensor 92 is embedded in the cylinder cap 1, and also there is certain distance in the probe of second temperature sensor 92 to the jet surface, claims effectively conduction distance, δ
Effectively=δ
Entirely-δ
Temperatureδ in the formula
EntirelyFull duration for cylinder cap 1; δ
TemperatureBe that second temperature sensor 92 is imbedded the degree of depth in the cylinder cap 1; Jet working medium is taken at the mean value that jet working medium inlet 312 and jet chamber export 311 temperature, uses T
AllExpression, heat flow density q adopts
Formula calculates, and considers the thermal resistance influence that this part produces, heat flow density
, T wherein
PenetrateTemperature for the jet impulse surface; T
SurveyIt is the temperature of second temperature sensor, 92 tests; δ effectively conducts distance; K is the coefficient of heat conductivity (deciding according to material property) of cylinder cap 1.
According
You can export jet impingement surface temperature:
Then the coefficient of heat transfer of jet impulse heat exchange surface can draw through
formula.
Claims (9)
1. experimental provision that engine cylinder cover is carried out jet impulse cooling; It is characterized in that: the heating member that comprises the cylinder cap that is embedded with second temperature sensor, cylinder cap is heated, cylinder cap is carried out the jet mechanism of jet impulse cooling and the data acquisition unit of gathering the second temperature sensor temperature data; Said jet mechanism is provided with the power unit that power is provided for it, and said data acquisition unit all is connected setting with second temperature sensor, data acquisition unit with heating member with power unit, data acquisition unit.
2. the experimental provision that engine cylinder cover is carried out the jet impulse cooling according to claim 1; It is characterized in that: said jet mechanism comprises jet working medium inlet and the jet chamber that conducting connects; The jet chamber includes the outlet of jet chamber, and jet working medium porch is provided with nozzle, and nozzle is provided with jet orifice; The equal conducting that enters the mouth of jet orifice and the outlet of jet chamber, jet orifice and jet working medium is connected, and nozzle is connected with and drives its actuator that moves up and down.
3. the experimental provision that engine cylinder cover is carried out the jet impulse cooling according to claim 2 is characterized in that: the outlet conducting of jet chamber is connected with fluid reservoir, and fluid reservoir is connected setting with power unit.
4. the experimental provision that engine cylinder cover is carried out the jet impulse cooling according to claim 3 is characterized in that: be provided with flowrate control valve between said fluid reservoir and the power unit.
5. according to claim 2 or the 3 or 4 described experimental provisions that engine cylinder cover carried out the jet impulse cooling; It is characterized in that: the conducting of jet working medium inlet is connected with constant temperature oven; Be provided with first temperature sensor between jet working medium inlet and the constant temperature oven; First temperature sensor is connected setting with data acquisition unit, constant temperature oven is connected setting with power unit, be provided with liquid mass flow meter between constant temperature oven and the power unit.
6. according to claim 1 or 2 or the 3 or 4 described experimental provisions that engine cylinder cover is carried out the jet impulse cooling, it is characterized in that: said cylinder cap is provided with thermal insulation material.
7. according to claim 1 or 2 or the 3 or 4 described experimental provisions that engine cylinder cover is carried out the jet impulse cooling, it is characterized in that: said heating member is a programmable heater.
8. according to claim 1 or 2 or the 3 or 4 described experimental provisions that engine cylinder cover is carried out the jet impulse cooling, it is characterized in that: said power unit is an electronic pump.
9. according to claim 2 or the 3 or 4 described experimental provisions that engine cylinder cover is carried out the jet impulse cooling, it is characterized in that: said actuator is a stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200913158U CN202453314U (en) | 2012-03-12 | 2012-03-12 | Experiment device for jetting, impacting and cooling engine cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200913158U CN202453314U (en) | 2012-03-12 | 2012-03-12 | Experiment device for jetting, impacting and cooling engine cylinder cover |
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| CN202453314U true CN202453314U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200913158U Expired - Fee Related CN202453314U (en) | 2012-03-12 | 2012-03-12 | Experiment device for jetting, impacting and cooling engine cylinder cover |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940574A (en) * | 2013-09-30 | 2014-07-23 | 中国人民解放军国防科学技术大学 | Cooling device in free jet flow test cabin |
| CN104165900A (en) * | 2014-08-22 | 2014-11-26 | 中国北方发动机研究所(天津) | Heat transfer rule assaying device of modular air cylinder cover |
| CN107860785A (en) * | 2017-12-08 | 2018-03-30 | 广西玉柴机器股份有限公司 | A kind of quick thermal fatigue test method of engine cylinder cap and device |
| CN108657040A (en) * | 2018-05-04 | 2018-10-16 | 厦门大学嘉庚学院 | Nanometer stream jet stream cooling automotive seat and its working method |
| CN108754387A (en) * | 2018-06-19 | 2018-11-06 | 西安交通大学 | A kind of low heat conduction long life double layer two mode field thermal barrier coating of high temperature resistant and its preparation process |
| CN110596187A (en) * | 2019-07-03 | 2019-12-20 | 西安科技大学 | Experimental table for simulating ignition oil product on hot surface of vehicle |
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2012
- 2012-03-12 CN CN2012200913158U patent/CN202453314U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940574A (en) * | 2013-09-30 | 2014-07-23 | 中国人民解放军国防科学技术大学 | Cooling device in free jet flow test cabin |
| CN103940574B (en) * | 2013-09-30 | 2017-09-05 | 中国人民解放军国防科学技术大学 | A kind of free jet test pod cooling unit |
| CN104165900A (en) * | 2014-08-22 | 2014-11-26 | 中国北方发动机研究所(天津) | Heat transfer rule assaying device of modular air cylinder cover |
| CN104165900B (en) * | 2014-08-22 | 2020-02-04 | 中国北方发动机研究所(天津) | Modular cylinder head heat transfer law analysis test device |
| CN107860785A (en) * | 2017-12-08 | 2018-03-30 | 广西玉柴机器股份有限公司 | A kind of quick thermal fatigue test method of engine cylinder cap and device |
| CN108657040A (en) * | 2018-05-04 | 2018-10-16 | 厦门大学嘉庚学院 | Nanometer stream jet stream cooling automotive seat and its working method |
| CN108657040B (en) * | 2018-05-04 | 2020-12-25 | 厦门大学嘉庚学院 | Nano-flow jet cooling automobile seat and working method thereof |
| CN108754387A (en) * | 2018-06-19 | 2018-11-06 | 西安交通大学 | A kind of low heat conduction long life double layer two mode field thermal barrier coating of high temperature resistant and its preparation process |
| CN108754387B (en) * | 2018-06-19 | 2020-10-27 | 西安交通大学 | High-temperature-resistant low-heat-conduction long-life double-layer dual-mode structure thermal barrier coating and preparation process thereof |
| CN110596187A (en) * | 2019-07-03 | 2019-12-20 | 西安科技大学 | Experimental table for simulating ignition oil product on hot surface of vehicle |
| CN110596187B (en) * | 2019-07-03 | 2024-02-20 | 西安科技大学 | Experiment table for simulating vehicle hot surface ignition oil product |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20130312 |