CN209912491U - Streamlined cross-flow type pilot - Google Patents
Streamlined cross-flow type pilot Download PDFInfo
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- CN209912491U CN209912491U CN201920391539.2U CN201920391539U CN209912491U CN 209912491 U CN209912491 U CN 209912491U CN 201920391539 U CN201920391539 U CN 201920391539U CN 209912491 U CN209912491 U CN 209912491U
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- 238000012360 testing method Methods 0.000 description 5
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- 230000007613 environmental effect Effects 0.000 description 3
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- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
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- 229910000831 Steel Inorganic materials 0.000 description 1
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Abstract
The utility model relates to a streamlined STREAMING pilot-plant failure ware, including pilot-plant failure ware body, the pilot-plant failure ware body is flat plate column structure, and the appearance profile is the variable cross section streamlined, and the front end is the incident surface, the center department of incident surface opens there is a stream passing mouth, the inside stream passing passageway that is equipped with of pilot-plant failure ware body sets up the mouth that releases on the rear end face of pilot-plant failure ware body, stream passing mouth guide high-speed draught flows in stream passing passageway by the mouth that releases flows out, stream passing passageway makes high-speed draught from preceding backward, by interior and outer slant downward flow play release mouth. Compared with the prior art, the utility model provides a streamlined STREAMING pilot barrier ware can relax the high-speed train operation pilot barrier ware preceding terminal surface receives the flow impact, disturbs the formation of two wheel tread departments of bogie front wheel pair flow separation simultaneously, suppresses its surface pressure pulsation and forms to the production of effective control pilot barrier ware and bogie regional pneumatic noise.
Description
Technical Field
The utility model relates to a high-speed train vehicle equips technique and pneumatic noise control technical field, concretely relates to streamlined cross-flow type pilot.
Background
The high-speed railway is developed rapidly in various countries in the world due to the superiorities of rapidness, high efficiency, energy conservation, environmental protection, safety, comfort and the like. The high speed of railway is an important trend in the development of the world nowadays. With the continuous improvement of the running speed of the train, the environmental problems caused by the continuous improvement are increasingly prominent, and the running experience of domestic and foreign high-speed railways shows that the noise problem is most prominent in the environmental pollution of the high-speed train. Therefore, the effective reduction and suppression of noise are issues that need to be considered and solved urgently in the design and construction of high-speed railways, and are also the key to whether railways can exert high-efficiency operation performance.
When the running speed of the high-speed train exceeds 300km/h, the aerodynamic noise exceeds the wheel rail rolling noise and the traction noise to occupy a dominant position. The main pneumatic noise sources of the high-speed train are a bogie, a pantograph pit, a connecting part of a carriage and the like. According to the contribution amount of the whole vehicle radiated noise, the bogie generates pneumatic noise about 15dB higher than that of a pantograph due to the large number of bogies. In the area of a bogie at the head of a high-speed train, when airflow flows through, violent flow separation and fluid impact are generated, and the airflow becomes a stronger pneumatic noise source. Because bogie structure is complicated, and application maturity is high, and each part design change degree of difficulty is great, and its aerodynamic noise falls and mainly takes measures such as through installing skirtboard in bogie cabin outside at present, nevertheless exposes in the outside wheel part of bogie cabin and still directly receives bottom of the car body incoming flow impact, induces to produce great aerodynamic noise. Therefore, for the locomotive bogie position of the main pneumatic noise source, it is necessary to research and develop a pneumatic noise reduction technology from the perspective of a pilot which influences the flow characteristics of a bogie area, so as to improve the environmental quality along the railway and the noise level in a cab and promote the industrial development of environment-friendly high-performance railway vehicles.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a streamlined cross-flow type pilot of the regional pneumatic noise of high-speed train locomotive bogie of effective reduction in order to control the pneumatic noise that high-speed train operation produced.
The purpose of the utility model is realized through the following technical scheme:
a streamline-type flow-through obstacle deflector comprises an obstacle deflector body, wherein the obstacle deflector body is of a flat plate-shaped structure, the outline of the obstacle deflector body is streamline-shaped with a variable cross section, the front end of the obstacle deflector body is a flow-facing surface, a flow-through opening is formed in the center of the flow-facing surface, a flow-through channel is arranged inside the obstacle deflector body, a flow-releasing opening is formed in the rear end face of the obstacle deflector body, high-speed airflow is guided by the flow-through opening to enter the flow-through channel and flow out of the flow-releasing opening, and the flow-through channel enables the high-speed airflow to flow out of the flow-releasing opening from front to back and from inside to outside in an oblique and downward mode.
Furthermore, the flow passing channel comprises a left branch flow passing channel and a right branch flow passing channel, the left branch flow passing channel and the right branch flow passing channel are obliquely arranged from the middle to two sides from the front end to the rear end, the front ends of the left branch flow passing channel and the right branch flow passing channel are crossed with the flow passing port, the rear ends of the left branch flow passing channel and the right branch flow passing channel are respectively communicated with the left flow releasing port and the right flow releasing port, and the left branch flow passing channel and the right branch flow passing channel divide high-speed airflow introduced by the flow passing ports into two paths which obliquely flow out from inside to outside.
Furthermore, the left branch flow passage and the right branch flow passage are symmetrically arranged on two sides of the longitudinal center line of the obstacle deflector body.
Further, the incident flow surface is arc-shaped.
Further, the edge of the incident flow surface is chamfered.
Further, the horizontal cross section of the obstacle deflector body gradually increases from the front end to the rear end.
The utility model discloses accessible adjustment pilot barrier wears to flow mouthful and releases the mouth of a river type parameter, sets up ways such as circulation channel quantity and design passageway shape parameter, carries out the control optimization of the regional pneumatic noise reduction effect of high-speed train locomotive bogie.
The utility model provides a streamlined STREAMING pilot unit that wears to flow, the appearance profile adopts streamlined variable cross section curve form transition, closely laminates with locomotive nose awl bottom region to satisfy the pneumatic performance requirement of high-speed train locomotive bottom. The utility model discloses well barrier removal ware flow passing mouth, its effect is for the air current flows in the flow passing passageway when guide train high speed operation, realizes shunting in the switch type flow passing passageway about in the barrier removal ware to release the mouth and flow out about barrier removal ware rear end face, make through the barrier removal ware air current from preceding backward, by interior and outside slant downward flow direction bogie under-deck front wheel pair about two-wheeled tread department. The utility model has the characteristics of avoid high-speed incoming flow to strike the flow of terminal surface before the closed barrier removal ware, simultaneously by barrier removal ware inner flow way drainage to front wheel pair both sides wheel position, destroy the formation of wheel tread department flow separation and surface pressure pulsation to restrain barrier removal ware itself and bogie front wheel pair wheel position pneumatic noise's production, effectively improve bogie regional pneumatic noise control effect.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the utility model provides a streamlined STREAMING pilot barrier ware can relax the high-speed train and move the pilot barrier ware before the terminal surface receives the flow impact, and the pneumatic noise of this position of effective control produces.
(2) The utility model discloses from the drainage of pilot unit front end, flow to the front wheel to both sides wheel position via the pilot unit inner flow way, through adjustment release mouth spout direction, the interference exposes in the formation of bogie cabin outer wheel tread both sides position flow separation, restraines its surface pressure pulsating formation to effectively reduce the production volume of the pneumatic noise of this position.
Drawings
Fig. 1 is a schematic structural view of a conventional barrier removing device;
FIG. 2 is a schematic structural view of the streamlined flow-through obstacle deflector of the present invention;
FIG. 3 is a cut-away view of the streamlined flow-through obstacle deflector of the present invention;
FIG. 4 is a front view of the streamlined flow-through obstacle deflector of the present invention;
FIG. 5 is a rear view of the streamlined flow-through obstacle deflector of the present invention;
FIG. 6 is a side view of the penetrating barrier of the present invention mounted on a train;
FIG. 7 is a front view of the penetrating barrier of the present invention mounted on a train;
fig. 8 is a comparison graph of one third octave test data of far field radiation noise of the present invention;
in the figure: the rail-mounted rail removal device comprises a rail-mounted rail-.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Examples
Fig. 1 is a schematic structural diagram of a conventional barrier removing device, which does not have a function of reducing aerodynamic noise in a bogie area of a head of a high-speed train. In order to carry out effective control to the aerodynamic noise that high-speed train operation produced, the utility model provides a reduce the regional aerodynamic noise's of high-speed train locomotive bogie streamlined flow-through type pilot, as figure 2-figure 5, including pilot body 1, pilot body 1 is flat plate column structure, the appearance profile is the variable cross section streamlined, the front end is the incident surface 103, the center department of incident surface 103 opens there is a flow-through 101, pilot body 1 is inside to be equipped with the flow-through passageway, set up flow-releasing port 102 on the rear end face of pilot body 1, flow-through 101 guides high-speed air current to get into the flow-through passageway and flows out by flow-releasing port 102, the flow-through passageway makes high-speed air current from preceding backward, from inside to outside slant flow-down flow-releasing port 102. The utility model discloses well barrier removal ware flow passing mouth 101, its effect is the air current inflow flow passing channel when guiding the train high speed operation, make high-speed air current from preceding backward via the barrier removal ware, from interior to exterior slant downward flow to bogie under-deck preceding wheel pair, avoid high-speed incoming flow to the flow impact of terminal surface before the closed barrier removal ware, simultaneously by runner drainage to wheel pair both sides wheel position in the barrier removal ware, destroy the formation of wheel tread both sides flow separation and surface pressure pulsation, thereby restrain the production of barrier removal ware itself and bogie front wheel pair wheel position aerodynamic noise, effectively improve bogie regional aerodynamic noise control effect.
Further preferably, the flow passage comprises a left branch flow passage 104 and a right branch flow passage 105, the left branch flow passage 104 and the right branch flow passage 105 are obliquely arranged from the middle to two sides from the front end to the rear end, the front end is crossed with the flow port 101, the rear end is respectively communicated with the left release port 1021 and the right release port 1022, the left branch flow passage 104 and the right branch flow passage 105 are symmetrically arranged at two sides of the longitudinal center line of the barrier removing device body 1, the left branch flow passage 104 and the right branch flow passage 105 divide the high-speed airflow flowing in from the flow port 101 into two paths to flow out obliquely downwards from inside to outside, so that the airflow is divided in the left and right branch flow passages in the barrier removing device and flows out from the left and right release ports at the rear end surface of the barrier removing device, and flows to the front wheel pair left and right wheel pairs of the bogie from front to back and from inside to outside obliquely downwards to flow channels in the barrier removing device to the wheel pairs at two side wheel pairs, the flow separation at the two sides of the tread of the wheel and the formation of surface pressure pulsation are damaged, so that the generation of pneumatic noise at the wheel position of the obstacle deflector and the front wheel of the bogie is inhibited.
Further preferably, the incident flow surface 103 is arc-shaped, the edge of the incident flow surface 103 is chamfered, the horizontal cross section of the obstacle deflector body 1 is gradually increased from the front end to the rear end, the outline adopts streamline variable-section curve form transition and is tightly attached to the nose cone bottom area of the train head so as to meet the requirement of the aerodynamic performance of the nose cone bottom of the high-speed train.
The obstacle deflector is installed at the bottom of the head of a high-speed train, as shown in fig. 6 and 7, wherein the marks are head 2, bogie 3 and steel rail 4. The center of the head-on surface of the front end of the obstacle deflector body 1 is provided with a flow through opening, so that the flow impact on the front end surface of the obstacle deflector when a high-speed train runs can be relieved, and the generation of pneumatic noise of the part can be effectively controlled. When a train runs at a high speed, high-speed airflow is guided from the front end of the obstacle deflector body 1 and flows to two wheel positions of a front wheel pair through a flow passing channel in the obstacle deflector, the generation of flow separation on two sides of a wheel tread exposed outside a steering frame cabin is disturbed by adjusting the direction of a nozzle of a flow release port, and the formation of surface pressure pulsation of the wheel tread is inhibited, so that the generation amount of pneumatic noise of the position is reduced.
The utility model discloses the noise reduction effect has been verified by the test of acoustics wind-tunnel. The test model is a 1:3 high-speed train head model provided with a bogie, and the rear end of the test model is connected with a smooth flow guide section so as to avoid the tail part of the train body from generating strong vortex to fall off. Adopt model train of STREAMING pilot and traditional pilot, far-field radiation noise third octave test result is more as shown in fig. 8 under 250km/h of wind speed, compares with traditional pilot, and the pneumatic noise sound pressure level of installation STREAMING pilot model train is lower in most frequency channels, and total sound pressure level reduces 0.65dB (A) in the frequency domain below 20kHz, has gained better noise reduction. Compare with experimental used proportion model, the high-speed train of actual online operation, the reynolds number that flows on every side is higher, the utility model discloses it can be better to alleviate the effect prediction that the barrier removal ware tip flows to strike and improves the separation of wheel flow, and the noise reduction effect who produces from this is also more showing.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should be able to make modifications and improvements within the scope of the present invention according to the disclosure of the present invention.
Claims (6)
1. The streamlined flow-through type obstacle deflector comprises an obstacle deflector body (1), and is characterized in that the obstacle deflector body (1) is of a flat plate-shaped structure, the outline of the obstacle deflector body is streamline, the front end of the obstacle deflector body is a flow-facing surface (103), a flow-through port (101) is formed in the center of the flow-facing surface (103), a flow-through channel is arranged inside the obstacle deflector body (1), a flow-releasing port (102) is formed in the rear end face of the obstacle deflector body (1), the flow-through port (101) guides high-speed airflow to enter the flow-through channel and flow out from the flow-releasing port (102), and the flow-through channel enables the high-speed airflow to obliquely flow out of the flow-releasing port (102) from front to back and from inside to outside.
2. The streamlined flow-through obstacle deflector of claim 1, wherein the flow-through channels comprise a left branch flow-through channel (104) and a right branch flow-through channel (105), the left branch flow-through channel (104) and the right branch flow-through channel (105) are arranged from the front end to the rear end from the middle to both sides in an inclined manner, the front end crosses the flow-through opening (101), the rear end is respectively communicated with the left flow-out opening (1021) and the right flow-out opening (1022), and the left branch flow-through channel (104) and the right branch flow-through channel (105) divide the high-speed airflow introduced from the flow-through opening (101) into two paths which flow out from inside to outside in an inclined manner.
3. The streamlined flow-through obstacle deflector of claim 2, wherein the left branch flow passage (104) and the right branch flow passage (105) are symmetrically arranged on two sides of the longitudinal center line of the obstacle deflector body (1).
4. A streamlined flow-through obstacle deflector according to claim 1, wherein the incident flow surface (103) is curved.
5. A streamlined flow-through obstacle deflector according to claim 4, wherein the edge of the incident flow surface (103) is chamfered.
6. A streamlined flow-through obstacle deflector according to claim 1, wherein the horizontal cross-section of the obstacle deflector body (1) gradually increases from the front end to the rear end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920391539.2U CN209912491U (en) | 2019-03-26 | 2019-03-26 | Streamlined cross-flow type pilot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920391539.2U CN209912491U (en) | 2019-03-26 | 2019-03-26 | Streamlined cross-flow type pilot |
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| Publication Number | Publication Date |
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| CN209912491U true CN209912491U (en) | 2020-01-07 |
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| CN201920391539.2U Expired - Fee Related CN209912491U (en) | 2019-03-26 | 2019-03-26 | Streamlined cross-flow type pilot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110070850A (en) * | 2019-03-26 | 2019-07-30 | 同济大学 | A kind of streamlined flow-through type pilot and its application |
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2019
- 2019-03-26 CN CN201920391539.2U patent/CN209912491U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110070850A (en) * | 2019-03-26 | 2019-07-30 | 同济大学 | A kind of streamlined flow-through type pilot and its application |
| CN110070850B (en) * | 2019-03-26 | 2024-05-31 | 同济大学 | Streamline flow-through type obstacle deflector and application thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200107 |