CN103175672A - Construction machinery radiator air tunnel capable of simulating wind and sand impact and using method thereof - Google Patents
Construction machinery radiator air tunnel capable of simulating wind and sand impact and using method thereof Download PDFInfo
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- CN103175672A CN103175672A CN2013100640395A CN201310064039A CN103175672A CN 103175672 A CN103175672 A CN 103175672A CN 2013100640395 A CN2013100640395 A CN 2013100640395A CN 201310064039 A CN201310064039 A CN 201310064039A CN 103175672 A CN103175672 A CN 103175672A
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Abstract
The invention discloses a construction machinery radiator air tunnel capable of simulating wind and sand impact and a using method thereof. The construction machinery radiator air tunnel comprises an air duct which comprises an air inlet segment, a front blowing segment, a side and bottom blowing segment, an hourglass control segment, a radiator module, a stable speed measuring segment and a wind speed measuring device which are connected sequentially. Three blowing fans with different diameters, different numbers of blades and different blade angles are adapted to generate combined airflow, practical wind speed changing rules can be analyzed according to statistics, frequency of variable frequency motors of the fans can be controlled stimulatingly according to a Monte Carlo simulation method, and situation of strong wind flowing in field can be stimulated. Gravels with different diameters are stored in the hourglass, gravel falling area at the bottom of the hourglass can be adjusted through a screw, gravel falling amount can be controlled, and a filter screen in the middle of the hourglass can be used for filtering large-size gravels. The gravels under the filter screen can be rolled up by the airflow generated by the fans and impact to the radiator module to judge whether the radiator module with the strength can resist the wind and dust or not, and thus, a process that the windy and dusty stimulation impacts the construction machinery radiator is realized.
Description
Technical field
The present invention relates to a kind of experimental provision, relate in particular to a kind of engineering machinery heating radiator wind-tunnel and using method thereof that dust storm impacts of simulating.
Background technology
The characteristics that engineering machinery has the work full load, environment temperature is high, vibratory impulse is large, stream time is long, the design heat spreader module generally considers to solve heat load problem.Yet the engineering machinery of working in Gobi desert, desert is very easy to be subject to the situation that dust that strong wind rolls and dust storm impact nacelle, and the grains of sand at a high speed can break the fin of heating radiator and stop up it and flow, thereby affect the normal use of heat spreader module.Therefore to the heat management system of engineering machinery, not only want the Thermal Load situation, the high strength of heat spreader module, anti-mud dirt are also had higher requirements.When the thickness of heat radiator fin is thicker, higher intensity is arranged, but the shortcoming that quality is heavy, cost is high is arranged, and fin thickness is when too thin, can't resist again the fin distortion that dust storm causes and damage.If have on such experimental facilities energy realistic simulation Gobi desert, desert, the situation of large wind volume sandstone impact radiator module can detect its tolerance intensity, and the thickness of definite heating radiator, will have larger practical value.The automobile radiators wind-tunnel mainly detects heat exchange and the resistance to flow situation of heating radiator at present, does not have the function that the analog radiator module is impacted by dust storm.
Summary of the invention
Purpose of the present invention is exactly in order to address the above problem, a kind of engineering machinery heating radiator wind-tunnel and using method thereof that dust storm impacts of simulating is provided, this device can be simulated in field environment different wind speed and be rolled sandstone and blow the situation of hitting heat spreader module, judges whether engineering machinery satisfies requirement of strength with the thickness of heat radiator fin.
To achieve these goals, the present invention adopts following technical scheme:
A kind of engineering machinery heating radiator wind-tunnel of simulating the dust storm impact, comprise an air duct, described air duct comprises the air in section that connects successively, positive blowing section, side and bottom surface blowing section, hourglass control section, heat spreader module, the stable section of testing the speed, wind speed measuring device; Be provided with the front fan blowing in described positive blowing section, described front fan blowing is arranged on the variable-frequency motor of front fan blowing; The side of described side and bottom surface blowing section is provided with the side direction air duct, the bottom surface of described side and bottom surface blowing section is provided with the bottom surface air duct, be provided with the side blow fan in described side direction air duct, described side blow fan is arranged on the variable-frequency motor of side blow fan, be provided with the bottom surface fan blowing in the air duct of described bottom surface, described bottom surface fan blowing is arranged on the variable-frequency motor of bottom surface fan blowing; Be provided with hourglass directly over described hourglass control section.
Described hourglass top is provided with filter screen, is provided with horizontal leading screw below described hourglass.
Described front fan blowing comprises that 7 not equidistant blades form, and is respectively by the angle of the center line of each blade clockwise: 43 °, 47 °, 53 °, 49 °, 57 °, 59 °.The diameter of bottom surface fan blowing is 1/3 of front fan blowing diameter, is comprised of 5 not equidistant blades, is respectively by the clockwise angle of the center line of each blade: 71 °, 67 °, 73 °, 77 °, 72 °.The diameter of side blow fan is 1/2 of front fan blowing diameter, is comprised of 5 not equidistant blades, is respectively by the clockwise angle of the center line of each blade: 79 °, 71 °, 70 °, 67 °, 73 °.Find through finite element modal analysis, in the fan blowing combination of different leaves and angle, the resonance of said fans combination results is minimum.
Described hourglass is used for storing sandstone, and the leading screw below described hourglass is used for adjusting the area of hourglass bottom leakage sand, to reach the husky effect of measuring of leaking of controlling.
Described filter screen is used for screening out larger-size sandstone, and according to different needs, the filtering accuracy of filter screen is 0.8mm-1.5mm, and the material of filter screen is stainless steel alloy.
Described heat spreader module comprises water radiator, intercooler, oil radiator and their combination, the structural shape of water radiator, intercooler, oil radiator is aldary and aluminium alloy for the corrugated tube type of not windowing, ripple belt, serrate, trapezoid belt and pipe type, material.
The engineering machinery that described simulation dust storm impacts with the concrete using method of heating radiator wind-tunnel is: collect the mobile variation of open-air wind speed, count the regularity of distribution, then control the velocity of rotation of fan by variable-frequency motor, after the air-flow combination that fan is rotated entrainmented, the air current flow of combination is changed and the purpose of dust storm impact is simulated in the similar realization of actual airflow;
The concrete control method of the velocity of rotation of described fan is:
According to the flowing law of air-flow in field environment, adopt the quasi-Monte Carlo simulation to adjust the rotation speed of the fan situation of change,
Front fan blowing rotation speed n 1 meets the Weibull distribution rule, changes once and continues for 10 seconds:
n1＝2000·(-lnr
i)
0.42
Bottom surface fan blowing rotation speed n 2 meets the Weibull distribution rule, changes once and continues for 10 seconds:
n2＝1800·(-lnr
i)
0.37
Side blow rotation speed of the fan n3 meets the Weibull distribution rule, changes once and continues for 10 seconds:
n3＝1600·(lnr
i)
0.45
R wherein
iBe pseudo random number, adopt the simulation of Prime Modulus multiplicative congruential method:
X
i＝16897·X
i-1(mod(2
32-1))
r
i＝X
i/(2
32-1)
Following formula mod() represent the meaning of remainder, X
iBe natural number, wherein X
0=3319; I increases naturally with changing number of times, and i is the natural number greater than 0.
Described wind speed measuring device adopts Pitot tube to measure by six measuring points that wait the long-pending layout of anchor ring on the circular hollow section of the stable section of testing the speed after test section, obtains the wind speed of air-flow of the cooperation of three kinds of fans.
The present invention adopts the process of three fan blowing simulation strong wind blast stones, and the diameter of described front fan blowing, side blow fan and ground fan blowing is different with angle can reduce the resonance effect that the blowing process causes.According to the open-air actual wind speed Changing Pattern that gathers and statistical is separated out, adopt the pseudo random number of Monte Carlo method structure Weibull distribution, adjust the frequency of variable-frequency motor, thereby control the velocity of rotation of fan, then measure and record the wind speed by wind-tunnel with Pitot tube.The sandstone of different-diameter is stored in hourglass, adopt leading screw, by leading screw, rotation is become movement, be used for adjusting the husky area of hourglass bottom leakage, to reach the effect of leaking husky amount of controlling, the middle part of hourglass is that a material is the filter screen of stainless steel alloy, and filtering accuracy is 0.8mm-1.5mm, is used for screening out larger-size sandstone.Roll the lower sandstone of filter screen filter by the air-flow of three desk fans, impact on heat spreader module, judge whether heat spreader module reaches the intensity of resisting dust storm.The engineering machinery that realization simulation dust storm the impacts process of heating radiator.
The beneficial effect of patent of the present invention is:
(1) adopt three different-diameters, the fan of different leaves angle and diverse location is controlled rotation speed of the fan based on Monte Carlo method, produces the motion of air-flow in the simulation of air flow real atmosphere;
(2) adopt hourglass and control to leak the quantity that the husky unit simulation strong wind of measuring entrainments dust storm;
(3) adopt the large diameter sandstone of filter screen filtering, make the dust storm diameter in the distribution of the diameter that entrainments dust storm and actual desert and Gobi desert similar, simulate on the whole Practical Project machinery when desert and Gobi desert operation, the situation of dust storm impact radiator module, the engineering machinery that realization simulation dust storm the impacts process of heating radiator, can reduce the situation of train experiment, greatly shorten the new product designs cycle, and improve intensity and the useful life longevity of product.
Description of drawings
Fig. 1 (a) is front elevation of the present invention;
Fig. 1 (b) is vertical view of the present invention;
Fig. 1 (c) is side view of the present invention;
Fig. 2 is concrete structure and the blade arrangement mode of front fan blowing;
Fig. 3 is concrete structure and the blade arrangement mode of side blow fan;
Fig. 4 is concrete structure and the blade arrangement mode of bottom surface fan blowing;
Fig. 5 is hourglass and the concrete structure of controlling the device that leaks husky amount;
Wherein, 1. air in section, the 2. variable-frequency motor of front fan blowing, 3. front fan blowing, 4. side blow fan, the 5. variable-frequency motor of side blow fan, 6. side direction air duct, the 7. variable-frequency motor of bottom surface fan blowing, 8. bottom surface fan blowing, 9. bottom surface air duct, 10. hourglass, 11. heat spreader modules, 12. the stable section of testing the speed, 13. wind speed measuring device, 14. filter screens, 15. leading screws.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
As shown in Fig. 1 (a)-Fig. 1 (c), a kind of engineering machinery heating radiator wind-tunnel of simulating the dust storm impact, comprise an air duct, described air duct comprises the air in section 1 that connects successively, positive blowing section, side and bottom surface blowing section, hourglass control section, heat spreader module 11, the stable section of testing the speed 12, wind speed measuring device 13; Be provided with front fan blowing 3 in described positive blowing section, described front fan blowing 3 is arranged on the variable-frequency motor 2 of front fan blowing; The side of described side and bottom surface blowing section is provided with side direction air duct 6, the bottom surface of described side and bottom surface blowing section is provided with bottom surface air duct 9, be provided with side blow fan 4 in described side direction air duct 6, described side blow fan 4 is arranged on the variable-frequency motor 5 of side blow fan, be provided with bottom surface fan blowing 8 in described bottom surface air duct 9, described bottom surface fan blowing 8 is arranged on the variable-frequency motor 7 of bottom surface fan blowing; Be provided with hourglass 10 directly over described hourglass control section.
Described hourglass 10 tops are provided with filter screen 14, and described hourglass 10 belows are provided with horizontal leading screw 15.
Described front fan blowing 3 comprises that 7 not equidistant blades form, and is respectively by the angle of the center line of each blade clockwise: 43 °, 47 °, 53 °, 49 °, 57 °, 59 °.The diameter of bottom surface fan blowing 8 is 1/3 of front fan blowing 3 diameters, is comprised of 5 not equidistant blades, is respectively by the clockwise angle of the center line of each blade: 71 °, 67 °, 73 °, 77 °, 72 °.The diameter of side blow fan 4 is 1/2 of front fan blowing 3 diameters, is comprised of 5 not equidistant blades, is respectively by the clockwise angle of the center line of each blade: 79 °, 71 °, 70 °, 67 °, 73 °.
Described hourglass 10 is used for the storage sandstone, and the leading screw 15 of described hourglass 10 belows is used for adjusting hourglass 10 bottoms and leaks husky areas, to reach the effect of leaking husky amount of controlling.
Described filter screen 14 is used for screening out larger-size sandstone, and according to different needs, the filtering accuracy of filter screen 14 is 0.8mm-1.5mm, and the material of filter screen 14 is stainless steel alloy.
Described heat spreader module 11 comprises water radiator, intercooler, oil radiator and their combination, the structural shape of water radiator, intercooler, oil radiator is aldary and aluminium alloy for the corrugated tube type of not windowing, ripple belt, serrate, trapezoid belt and pipe type, material.
The engineering machinery that described simulation dust storm impacts with the concrete using method of heating radiator wind-tunnel is: collect the mobile variation of open-air wind speed, count the regularity of distribution, then control the velocity of rotation of fan by variable-frequency motor, after the air-flow combination that fan is rotated entrainmented, the air current flow of combination is changed and the purpose of dust storm impact is simulated in the similar realization of actual airflow;
The concrete control method of the velocity of rotation of described fan is:
According to the flowing law of air-flow in field environment, adopt the quasi-Monte Carlo simulation to adjust the rotation speed of the fan situation of change,
Fan blowing 3 rotation speed n 1 in front meet the Weibull distribution rule, change once and continue for 10 seconds:
n1＝2000·(lnr
i)
0.42
Fan blowing 8 rotation speed n 2 in bottom surface meet the Weibull distribution rule, change once and continue for 10 seconds:
n2＝1800·(lnr
i)
0.37
Side blow fan 4 rotation speed n 3 meet the Weibull distribution rule, change once and continue for 10 seconds:
n3＝1600·(-lnr
i)
0.45
R wherein
iBe pseudo random number, adopt the simulation of Prime Modulus multiplicative congruential method:
X
i＝16897·X
i-1(mod(2
32-1))
r
i＝X
i/(2
32-1)
Following formula mod() represent the meaning of remainder, X
iBe natural number, wherein X
0=3319; I increases naturally with changing number of times, and i is the natural number greater than 0.
Described wind speed measuring device 13 adopts Pitot tube to measure by six measuring points that wait the long-pending layout of anchor ring on the circular hollow section of the stable section of testing the speed after test section, obtains the actual flow velocity of the cooperation downstream of three kinds of fans.
Fan is that the blowing mode is blown, and most of air-flow is provided by front fan blowing 3, and the air-flow weave in that the air-flow that side blow fan 4 and bottom surface fan blowing 8 produce and front fan blowing 3 produce is simulated air current flow situation in actual ambient atmosphere.Hourglass 10 is in the back of three fans, under the effect of the air-flow that three fans form, rushes at heat spreader module 11 through the grains of sand that hourglass 10 sifts out, simulates the situation of the dust storm impact radiator module 11 in actual desert, Gobi desert.The air-flow of process heat spreader module 11 gets off the velocity-stabilization of air-flow by the stable section of testing the speed 12, then measures its flow velocity by pitot tube.
As shown in Figure 2, front fan blowing 3 is comprised of the blade of 7 not equidistant (referring to that angle does not wait), and the angle along a1 to a7 by the center line of clockwise each blade is respectively: 43 °, 47 °, 53 °, 49 °, 57 °, 59 °.
As shown in Figure 3, the diameter of side blow fan 4 is 1/2 of front fan blowing 3 diameters, blade by 5 not equidistant (referring to that angle does not wait) forms, by being respectively to the angle of the center line of each blade of b5 along b1 clockwise: the angle difference of 79 °, 71 °, 70 °, 67 °, 73 ° fans.
As shown in Figure 4, the diameter of bottom surface fan blowing 8 is 1/3 of front fan blowing 3 diameters, is comprised of 5 not equidistant blades, by being respectively to the angle of the center line of each blade of c5 along c1 clockwise: 71 °, 67 °, 73 °, 77 °, 72 °.
As shown in Figure 5, have filter screen 14 to be used for the diameter of the control grains of sand in the middle of hourglass 10, the below adopts leading screw 15 to control the base plate of hourglasses 10, by leading screw 15, rotation is become movement, is used for adjusting the hourglass 10 husky areas of bottoms leakage, to reach the husky effect of measuring of leaking of controlling.
Although above-mentionedly by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (9)
1. simulate the engineering machinery heating radiator wind-tunnel that dust storm impacts for one kind, it is characterized in that, comprise an air duct, described air duct comprises the air in section that connects successively, positive blowing section, side and bottom surface blowing section, hourglass control section, heat spreader module, the stable section of testing the speed, wind speed measuring device; Be provided with the front fan blowing in described positive blowing section, described front fan blowing is arranged on the variable-frequency motor of front fan blowing; The side of described side and bottom surface blowing section is provided with the side direction air duct, the bottom surface of described side and bottom surface blowing section is provided with the bottom surface air duct, be provided with the side blow fan in described side direction air duct, described side blow fan is arranged on the variable-frequency motor of side blow fan, be provided with the bottom surface fan blowing in the air duct of described bottom surface, described bottom surface fan blowing is arranged on the variable-frequency motor of bottom surface fan blowing; Be provided with hourglass directly over described hourglass control section.
2. a kind of engineering machinery heating radiator wind-tunnel that dust storm impacts of simulating as claimed in claim 1, is characterized in that, is provided with filter screen above described hourglass, is provided with horizontal leading screw below described hourglass.
3. a kind of engineering machinery heating radiator wind-tunnel that dust storm impacts of simulating as claimed in claim 1, it is characterized in that, described front fan blowing comprises that 7 not equidistant blades form, and is respectively by the angle of the center line of each blade clockwise: 43 °, 47 °, 53 °, 49 °, 57 °, 59 °.
4. a kind of engineering machinery heating radiator wind-tunnel that dust storm impacts of simulating as claimed in claim 1, it is characterized in that, the diameter of described bottom surface fan blowing is 1/3 of front fan blowing diameter, formed by 5 not equidistant blades, be respectively by the clockwise angle of the center line of each blade: 71 °, 67 °, 73 °, 77 °, 72 °.
5. a kind of engineering machinery heating radiator wind-tunnel that dust storm impacts of simulating as claimed in claim 1, it is characterized in that, the diameter of described side blow fan is 1/2 of front fan blowing diameter, formed by 5 not equidistant blades, be respectively by the clockwise angle of the center line of each blade: 79 °, 71 °, 70 °, 67 °, 73 °.
6. a kind of engineering machinery heating radiator wind-tunnel that dust storm impacts of simulating as claimed in claim 1, is characterized in that, according to different needs, the filtering accuracy of described filter screen is 0.8mm-1.5mm, and the material of filter screen is stainless steel alloy.
7. a kind of engineering machinery heating radiator wind-tunnel that dust storm impacts of simulating as claimed in claim 1, it is characterized in that, described heat spreader module comprises water radiator, intercooler, oil radiator and their combination, the structural shape of water radiator, intercooler, oil radiator is aldary and aluminium alloy for the corrugated tube type of not windowing, ripple belt, serrate, trapezoid belt or pipe type, material.
8. a kind of engineering machinery heating radiator wind-tunnel that dust storm impacts of simulating as claimed in claim 1, it is characterized in that, described wind speed measuring device, adopt Pitot tube to measure by six measuring points that wait the long-pending layout of anchor ring on the circular hollow section of the stable section of testing the speed, the different wind speed of air-flow after the cooperation of three kinds of fans of record.
9. as describedly in above-mentioned arbitrary claim a kind ofly simulate engineering machinery that dust storm impacts with the using method of heating radiator wind-tunnel, it is characterized in that, collect the mobile variation of open-air wind speed, count the regularity of distribution, then control the velocity of rotation of fan by variable-frequency motor, after the air-flow combination that fan is rotated entrainmented, the air current flow of combination is changed and the purpose of dust storm impact is simulated in the similar realization of actual airflow;
The concrete control method of the velocity of rotation of described fan is:
According to the flowing law of air-flow in field environment, adopt the quasi-Monte Carlo simulation to adjust the rotation speed of the fan situation of change,
Front fan blowing rotation speed n 1 meets the Weibull distribution rule, changes once and continues for 10 seconds:
n1＝2000·(-lnr
i)
0.42
Bottom surface fan blowing rotation speed n 2 meets the Weibull distribution rule, changes once and continues for 10 seconds:
n2＝1800·(-lnr
i)
0.37
Side blow rotation speed of the fan n3 meets the Weibull distribution rule, changes once and continues for 10 seconds:
n3＝1600·(-lnr
i)
0.45
R wherein
iBe pseudo random number, adopt the simulation of Prime Modulus multiplicative congruential method:
X
i＝16897·X
i-1(mod(2
32-1))
r
i＝X
i/(2
32-1)
Following formula mod() represent the meaning of remainder, X
iBe natural number, wherein X
0=3319; I increases naturally with changing number of times, and i is the natural number greater than 0.
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| CN104075871B (en) * | 2014-07-17 | 2016-08-17 | 中国科学院寒区旱区环境与工程研究所 | The application in terms of plant physiological ecology of the funneling unit barrel device |
| CN104075871A (en) * | 2014-07-17 | 2014-10-01 | 中国科学院寒区旱区环境与工程研究所 | Application of funnel type unit barrel device in plant physiology and ecology aspect |
| CN105203720A (en) * | 2015-10-29 | 2015-12-30 | 中国地质大学（北京） | Test device and test method for wind, sand and underground water interaction |
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| CN109000866A (en) * | 2018-06-07 | 2018-12-14 | 东北大学 | Unmanned plane answers material wing dynamic characteristic and damage check equipment under dust storm-thermal environment |
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| CN109186924A (en) * | 2018-08-01 | 2019-01-11 | 西南交通大学 | A kind of charming appearance and behaviour particle movement wind comfort device |
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| CN109839280B (en) * | 2019-03-27 | 2024-04-05 | 常州市佳乐车辆配件制造有限公司 | Experimental device for simulating impact of sand particles outside vehicle |
| CN110160733A (en) * | 2019-05-16 | 2019-08-23 | 湖南第一师范学院 | A kind of adjustable laying component of wind comfort |
| CN111003118A (en) * | 2020-01-08 | 2020-04-14 | 龙泉越来自动化技术有限公司 | Quality detection equipment of sail |
| CN114526108A (en) * | 2022-02-11 | 2022-05-24 | 河南新华五岳抽水蓄能发电有限公司 | Large underground engineering cavern construction ventilation structure and construction method thereof |
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| CN115683538A (en) * | 2022-11-25 | 2023-02-03 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel dust environment simulation device and method based on plasma excitation |
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