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Outer wind shield for vehicle

A technology for external windshields and vehicles, which is applied in railway car bodies, railway car body components, climate sustainability, etc. to improve the airflow environment, reduce aerodynamic forces, and improve disturbances.

Active Publication Date: 2013-05-01
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of aerodynamic resistance that can improve the operation of the EMU in order to solve the problem of valgus and tearing of the existing outer windshield during high-speed operation. , and at the same time, it can ensure that the outer windshield does not turn outward during high-speed operation, thereby solving the risk of vehicle operation and reducing the cost of outer windshield replacement and maintenance

Method used

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  • Outer wind shield for vehicle
  • Outer wind shield for vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Such as figure 1 As shown, open the guide slot at the bottom of the outer windshield.

[0016] Due to the uneven track and complex equipment at the bottom of the car, the airflow at the bottom of the car body is the most unstable, and the external windshield tends to turn over and tear from the bottom of the car. Opening the diversion groove at the bottom of the outer windshield can increase the space for airflow diversion, which is beneficial to the pressure relief of the airflow under the car, thereby reducing the impact of the airflow disturbance at the bottom of the car on the outer windshield, and improving the tearing of the outer windshield at the bottom of the car Condition. Of course, the outer windshield of the present invention is not limited to rail vehicles.

Embodiment 2

[0018] Such as figure 2 As shown, add a protective steel sleeve inside the mounting hole.

[0019] After adding the protective steel sleeve, the stress form of the mounting hole is changed from the line contact between the rubber and the bolt thread to the line contact between the bolt and the steel sleeve, and then the surface of the steel sleeve is in contact with the rubber surface of the mounting hole, which improves the bearing capacity of the mounting hole. It reduces the stress concentration of the mounting hole, thereby preventing the rubber from deforming and tearing under the interaction with the bolt.

[0020] At the same time, due to the support of the protective steel sleeve, the bending strength of the mounting hole position is also correspondingly improved, which can effectively prevent the bending deformation of the outer windshield under the action of a large external force.

Embodiment 3

[0022] Such as image 3 As shown, the wing plate of the outer windshield is designed as an inclined structure. Preferably, it is inwardly inclined at α° with the direction of the vehicle body. The size of α is based on the aerodynamic calculation and analysis that can effectively reduce the pressure difference on both sides of the outer windshield. .

[0023] The study found that when the inclination angle α is not less than 2° and the vehicle speed is at medium or high speed, the pressure difference on both sides of the outer windshield can be effectively reduced through aerodynamic calculation and analysis, thereby reducing the valgus force of the airflow on the outer windshield , especially to reduce the probability of the outer windshield turning over when the vehicle is running at high speed, and finally achieve the purpose of preventing the outer windshield from tearing. This patent has implemented 2°, 5°, and 10° inclination angles, preferably 5°. At this time, the str...

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Abstract

The invention relates to an outer wind shield for a vehicle. The outer wind shield is characterized in that a guide groove is arranged at the vehicle bottom position of the outer wind shield, thus guide space of air flow can be increased, and the influence on the outer wind shield due to air flow disturbance at the vehicle bottom can be improved; a protecting steel sleeve is added at the installation hole position of the outer wind shield, thus the stress concentration on rubber due to installation threads can be reduced, the stressed area of an installation hole can be increased, the stress distribution situation of the installation hole can be improved, and the anti-bending performance of the outer wind shield can be increased through the supporting of the protecting steel sleeve; and a certain inwards-inclined angle exists between a wing plate of the outer wing shield and a vehicle body direction, thus pressure difference at two sides of the outer wind shield can be reduced, the eversion aerodynamic force suffered by the outer wind shield can be reduced, the air flow environment of the whole outer wind shield can be improved, the inwards-inclined angle is not less than 2 degrees, and the force distribution of the air flow on the outer wind shield can be more facilitated. According to the outer wind shield disclosed by the invention, through the improvement, the defect that the outer wind shield is in eversion or avulsion when a train is in high-speed running can be overcome, the service life of the outer wind shield is prolonged, and the replacing and repairing cost can be reduced.

Description

Technical field: [0001] The invention relates to an improved structure of an outer windshield, in particular to an improved structure of an outer windshield for an EMU, and belongs to the field of mechanical manufacturing. Background technique: [0002] In order to reduce the aerodynamic resistance of the running of the EMU, improve the airflow conditions at the position of the windshield at the junction of the carriages, and reduce the aerodynamic noise and lateral aerodynamic force at the junction of the carriages, devices with outer windshield structures are installed on both sides of the inner windshield of the EMU. . When the EMU is running at high speed, due to the change of the cross-section of the car body at the junction of the cars, the airflow disturbance is intensified, which increases the aerodynamic resistance and aerodynamic noise of the whole car running. When the vehicle crosses a curve, meets another vehicle, or passes through a tunnel, the impact of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61D17/02
CPCY02T30/32Y02T30/00
Inventor 王兴伟缪惠勇朱闰平程海涛刘建勋
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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