CN104101476B - Device used for measuring tail negative pressure of a transport carriage body model and test method thereof - Google Patents
Device used for measuring tail negative pressure of a transport carriage body model and test method thereof Download PDFInfo
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- CN104101476B CN104101476B CN201410250991.9A CN201410250991A CN104101476B CN 104101476 B CN104101476 B CN 104101476B CN 201410250991 A CN201410250991 A CN 201410250991A CN 104101476 B CN104101476 B CN 104101476B
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- negative pressure
- testing cassete
- afterbody
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Abstract
The invention discloses a device used for measuring the tail negative pressure of a transport carriage body model and a test method thereof. The device comprises an air inlet section which is connected with a fan interface, a test observation section with a built-in anemometer, and a diversion air grid which is arranged between the air inlet section and the test observation section. A double guide rail is arranged at the bottom in the test observation section along the axial direction. A test box with a sealed end part and an open tail is placed on the double guide rail in a sliding manner. The test model is placed in the test box in a sliding manner. A dynamometer is arranged at the end part of the air inlet section. The dynamometer comprises a connecting shaft. The connecting shaft sequentially passes through the air inlet section and the diversion air grid, and stretches into the test observation section. The end part of the test model passes through the test box through a cable and is connected with the connecting shaft. The device can directly replace an air tunnel test, avoids the shortcomings of expensive cost and complex test process of the air tunnel test, and has the advantages of simple structure, convenient and fast test and small difference.
Description
Technical field
The present invention relates to transport van windage fields of measurement, particularly relate to a kind of mensuration transport vehicle envelope mould
The device of type afterbody negative pressure and method of testing thereof.
Background technology
Transport van is during travelling, mainly by windward side normal pressure, tailstock negative pressure with rub
Wipe the effect of resistance.The envelope of transport van is independent rectangular structure, during travelling,
The comparison of resistance of suffered wind is big, and big windage means that transport van to consume more energy.
For the transport van that envelope is shorter, pressure drag front and back occupies mastery reaction, although people realize
Relatively big to the negative pressure of transport van afterbody, but owing to being limited by test condition, concrete for it
Size cannot be measured easily.Existing main method of measuring resistance is to carry out dynamometry experiment in wind-tunnel with balance,
And construction of wind tunnel is complicated, involve great expense, test period long, in the survey utilizing wind-tunnel to carry out tailstock negative pressure
Determine aspect also by the biggest restriction.
Summary of the invention
It is an object of the invention to overcome the shortcoming and defect of above-mentioned prior art, it is provided that a kind of simple in construction,
The cheap device measuring conveying carriage body Model afterbody negative pressure and method of testing thereof.
The present invention is achieved through the following technical solutions:
A kind of device measuring conveying carriage body Model afterbody negative pressure, including entering of connecting fan interface 11
Wind section 1, be built-in with the experimental observation section 3 of anemometer 9, be arranged on wind inlet section 1 and experimental observation section 3 it
Between water conservancy diversion air grid 2；
The inner bottom part of described experimental observation section 3 is axially disposed double guide rail 7, to slide on this pair of guide rail 7
Mode be placed with the testing cassete 6 of an end seal, afterbody opening, test model 5 is in a sliding manner
It is positioned in testing cassete 6；
The end of described wind inlet section 1 is provided with ergometer 12, and ergometer 12 includes a connecting shaft 10,
Connecting shaft 10 sequentially passes through wind inlet section 1, water conservancy diversion air grid 2, stretches in experimental observation section 3, described test
The end of model 5 is connected with connecting shaft 10 through testing cassete 6 by bracing wire 8.
The cross sectional shape of described testing cassete 6 is rectangular；A transparent active door is had in experimental observation section 3.
The method using said apparatus to measure conveying carriage body Model afterbody negative pressure, comprises the steps:
(1) coat lubricating oil at the inwall of testing cassete 6 and the surface of test model 5, and mould will be tested
The inside of testing cassete 6 put into by type 5；
(2) open and be positioned at the dodge gate 4 of experimental observation section 3, testing cassete 6 is fixed on double guide rail 7,
The end of test model 5 is connected with connecting shaft 10 through testing cassete 6 by bracing wire 8, closes dodge gate
4；
(3) starting blower fan, extraneous air enters wind inlet section 1 by fan interface 11, then by water conservancy diversion wind
Grid 2 enter experimental observation section 3 after shunting, and produce simulation wind speed environments inside laboratory observation section 3；
(4) testing cassete 6 is by simulation wind action, and air-flow separates at the afterbody of testing cassete 6, produces
A raw afterbody negative pressure, causes the test model 5 within testing cassete 6 to be similarly subjected to this afterbody negative pressure
Effect, the bracing wire 8 of test model 5 front end pulls connecting shaft 10, ergometer stress, thus measures test
Negative pressure suffered by model 5.
For this test model 5, follow-on test is averaged for three times, and as this test model 5 institute
By afterbody negative pressure.
The afterbody negative pressure suffered under different wind friction velocities in order to measure test model 5, by regulation
The wind speed of blower fan, simulates the air stream flowing environment under different wind speed, and then measures test model not
With under wind friction velocity, suffered afterbody negative pressure.
The present invention, relative to prior art, has such advantages as and effect:
The end seal of testing cassete, afterbody opening, be coated with at the inwall of testing cassete and the surface of test model
There is lubricating layer (lubricating oil)；On the one hand, owing between test model and testing cassete, lubrication is good, and survey
Die trial type is thin aluminium alloy structure, therefore can ignore the frictional resistance between test model and testing cassete
Effect；On the other hand, test model is placed in the inside of testing cassete, so the front end of test model is not by just
The effect of pressure.Therefore, it follows that test model is only made by afterbody negative pressure in test process
With.
Owing to this device can directly substitute wind tunnel test, on the one hand, avoid and carry out wind tunnel test and need
Build the expensive cost spent by wind-tunnel facility；On the other hand, it is to avoid required complicated in the test process
Test equipment.And this apparatus structure is simple, convenient test quick, method of testing error is less, city
Potentiality are big, its application be beneficial to transport van type car body afterbody negative pressure determination techniques popularization and
Universal.
Accompanying drawing explanation
Fig. 1 is the total schematic diagram of present configuration.
Fig. 2 is test model schematic diagram in Fig. 1.
Fig. 3 is testing cassete structure chart in Fig. 1.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment
As shown in Figures 1 to 3.The present invention measures the device of conveying carriage body Model afterbody negative pressure, including
The wind inlet section 1 of connecting fan interface 11, it is built-in with the experimental observation section 3 of anemometer 9, is arranged on air intake
Water conservancy diversion air grid 2 between section 1 and experimental observation section 3；
The inner bottom part of described experimental observation section 3 is axially disposed double guide rail 7, to slide on this pair of guide rail 7
Mode be placed with the testing cassete 6 of an end seal, afterbody opening, test model 5 is in a sliding manner
It is positioned in testing cassete 6；
The end of described wind inlet section 1 is provided with ergometer 12, and ergometer 12 includes a connecting shaft 10,
Connecting shaft 10 sequentially passes through wind inlet section 1, water conservancy diversion air grid 2, stretches in experimental observation section 3, described test
The end of model 5 is connected with connecting shaft 10 through testing cassete 6 by bracing wire 8.
The cross sectional shape of described testing cassete 6 is rectangular.
A transparent active door is had in experimental observation section 3.
The end seal of testing cassete 6, afterbody opening, at the inwall of testing cassete 6 and test model 5
Lubricating oil is coated on surface；On the one hand, owing between test model 5 and testing cassete 6, lubrication is good, and
Test model 5 is thin aluminium alloy structure, therefore can ignore between test model 5 and testing cassete 6
Frictional resistance effect；On the other hand, test model 5 is placed in the inside of testing cassete 6, so test model 5
Front end do not acted on by normal pressure.Therefore, it follows that test model 5 is only subject in test process
The effect of afterbody negative pressure.
The method measuring conveying carriage body Model afterbody negative pressure, can be realized by following step:
(1) coat lubricating oil at the inwall of testing cassete 6 and the surface of test model 5, and mould will be tested
The inside of testing cassete 6 put into by type 5；
(2) open and be positioned at the dodge gate 4 of experimental observation section 3, testing cassete 6 is fixed on double guide rail 7,
The end of test model 5 is connected with connecting shaft 10 through testing cassete 6 by bracing wire 8, closes dodge gate
4；
(3) starting blower fan, extraneous air enters wind inlet section 1 by fan interface 11, then by water conservancy diversion wind
Grid 2 enter experimental observation section 3 after shunting, and produce simulation wind speed environments inside laboratory observation section 3；
(4) testing cassete 6 is by simulation wind action, and air-flow separates at the afterbody of testing cassete 6, produces
A raw afterbody negative pressure, causes the test model 5 within testing cassete 6 to be similarly subjected to this afterbody negative pressure
Effect, the bracing wire 8 of test model 5 front end pulls connecting shaft 10, ergometer stress, thus measures test
Negative pressure suffered by model 5.
In order to obtain negative pressure more accurately, for this test model 5, follow-on test is averaged for three times,
And as afterbody negative pressure suffered by this test model 5.
The afterbody negative pressure suffered under different wind friction velocities in order to measure test model 5, by regulation
The wind speed of blower fan, simulates the air stream flowing environment under different wind speed, and then measures test model not
With under wind friction velocity, suffered afterbody negative pressure.
Owing to this device can directly substitute wind tunnel test, on the one hand, avoid and carry out wind tunnel test and need
Build the expensive cost spent by wind-tunnel facility；On the other hand, it is to avoid required complicated in the test process
Test equipment.And this apparatus structure is simple, convenient test quick, method of testing error is less, city
Potentiality are big, its application be beneficial to transport van type car body afterbody negative pressure determination techniques popularization and
Universal.
As it has been described above, just can preferably realize the present invention.
Embodiments of the present invention are also not restricted to the described embodiments, and other are any without departing from the present invention's
The change made under spirit and principle, modify, substitute, combine, simplify, all should be putting of equivalence
Change mode, within being included in protection scope of the present invention.
Claims (6)
1. measure a device for conveying carriage body Model afterbody negative pressure, including entering of connecting fan interface
Wind section, the experimental observation section being built-in with anemometer, the water conservancy diversion that is arranged between wind inlet section and experimental observation section
Air grid, it is characterised in that:
The inner bottom part of described experimental observation section is axially disposed double guide rail, with the side slided on this pair of guide rail
Formula is placed with an end seal, the testing cassete of afterbody opening, and test model is positioned in a sliding manner
In testing cassete；
The end of described wind inlet section is provided with ergometer, and ergometer includes a connecting shaft, and connecting shaft is successively
Through wind inlet section, water conservancy diversion air grid, stretching in experimental observation section, bracing wire is passed through in the end of described test model
It is connected through testing cassete with connecting shaft.
The device of mensuration conveying carriage body Model afterbody negative pressure the most according to claim 1, it is special
Levy and be: the cross sectional shape of described testing cassete is rectangular.
The device of mensuration conveying carriage body Model afterbody negative pressure the most according to claim 1, it is special
Levy and be: in experimental observation section, have a transparent active door.
4. use device according to any one of claims 1 to 3 to measure conveying carriage body Model afterbody negative pressure
The method of power, it is characterised in that comprise the steps:
(1) coat lubricating oil at the inwall of testing cassete and the surface of test model, and test model is put
Enter the inside of testing cassete；
(2) open and be positioned at the dodge gate of experimental observation section, testing cassete is fixed on double guide rail, will test
The end of model is connected with connecting shaft by being drawstring through testing cassete, closes dodge gate；
(3) starting blower fan, extraneous air is entered wind inlet section by fan interface, then is sent out by water conservancy diversion air grid
Enter experimental observation section after stream estranged, produce simulation wind speed environments at experimental observation intrasegmental part；
(4) testing cassete is by simulation wind action, and air-flow separates at the afterbody of testing cassete, produces one
Individual afterbody negative pressure, causes the test model within testing cassete to be similarly subjected to this afterbody negative pressure effect, surveys
The bracing wire of die trial type front end pulls connecting shaft, ergometer stress, thus measures negative pressure suffered by test model
Power.
Method the most according to claim 4, it is characterised in that: for this test model, survey continuously
Try to average for three times, and as afterbody negative pressure suffered by this test model.
Method the most according to claim 5, it is characterised in that: in order to measure test model in difference
Afterbody negative pressure suffered under wind friction velocity, by regulating the wind speed of blower fan, simulates under different wind speed
Air stream flowing environment, and then measure test model under different wind friction velocities, suffered afterbody is born
Pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410250991.9A CN104101476B (en) | 2014-06-06 | 2014-06-06 | Device used for measuring tail negative pressure of a transport carriage body model and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410250991.9A CN104101476B (en) | 2014-06-06 | 2014-06-06 | Device used for measuring tail negative pressure of a transport carriage body model and test method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104101476A CN104101476A (en) | 2014-10-15 |
| CN104101476B true CN104101476B (en) | 2017-01-11 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410250991.9A Expired - Fee Related CN104101476B (en) | 2014-06-06 | 2014-06-06 | Device used for measuring tail negative pressure of a transport carriage body model and test method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101084425A (en) * | 2004-12-22 | 2007-12-05 | 空中客车德国有限公司 | Method and apparatus for improving the accuracy of wind tunnel measurements in order to correct the influence of a suspension device |
| CN103018002A (en) * | 2012-11-26 | 2013-04-03 | 华南理工大学 | Testing device and method for measuring wind drag of automobile model |
| CN103175671A (en) * | 2013-03-26 | 2013-06-26 | 华南理工大学 | Simulation device and method for wind resistance of speed-regulating laminar wind flow flowing test model |
| CN103630322A (en) * | 2013-11-29 | 2014-03-12 | 华南理工大学 | Resistance measuring device and method for measuring wind resistance factor of non-smooth surface object |
| CN103723136A (en) * | 2012-10-12 | 2014-04-16 | 日信工业株式会社 | Vacuum booster |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3272593B2 (en) * | 1996-02-21 | 2002-04-08 | 三菱重工業株式会社 | High-speed body test equipment |
-
2014
- 2014-06-06 CN CN201410250991.9A patent/CN104101476B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101084425A (en) * | 2004-12-22 | 2007-12-05 | 空中客车德国有限公司 | Method and apparatus for improving the accuracy of wind tunnel measurements in order to correct the influence of a suspension device |
| CN103723136A (en) * | 2012-10-12 | 2014-04-16 | 日信工业株式会社 | Vacuum booster |
| CN103018002A (en) * | 2012-11-26 | 2013-04-03 | 华南理工大学 | Testing device and method for measuring wind drag of automobile model |
| CN103175671A (en) * | 2013-03-26 | 2013-06-26 | 华南理工大学 | Simulation device and method for wind resistance of speed-regulating laminar wind flow flowing test model |
| CN103630322A (en) * | 2013-11-29 | 2014-03-12 | 华南理工大学 | Resistance measuring device and method for measuring wind resistance factor of non-smooth surface object |
Non-Patent Citations (1)
| Title |
|---|
| 厢式货车空气动力学特性及减小空气阻力的风洞实验研究;李伟 等;《中国公路学报》;19941231;第7卷(第4期);90-95 * |
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|---|---|
| CN104101476A (en) | 2014-10-15 |
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Granted publication date: 20170111 |