CN212289836U

CN212289836U - Outer windshield structure of high-speed train

Info

Publication number: CN212289836U
Application number: CN202021724824.0U
Authority: CN
Inventors: 熊小慧; 梁习锋; 刘堂红; 余以正; 钟睦; 唐明赞; 朱亮
Original assignee: Central South University; CRRC Changchun Railway Vehicles Co Ltd
Current assignee: Central South University; CRRC Changchun Railway Vehicles Co Ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-01-05
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a high-speed train outer wind keeps off structure, including first outer wind fender wall, second outer wind fender wall and outer wind fender arc segment, the both ends of outer wind fender arc segment are connected with first outer wind fender wall and second outer wind fender wall respectively and form the outer wind profile of U type, first outer wind fender wall is equipped with first little strengthening rib with outer wind fender arc segment junction inner wall, second outer wind fender wall is equipped with the little strengthening rib of second with outer wind fender arc segment junction inner wall, the root inner wall of first outer wind fender wall is equipped with first big strengthening rib, the root inner wall of second outer wind fender wall is equipped with the big strengthening rib of second, first little strengthening rib, the little strengthening rib of second, the other end of the big strengthening rib of first big strengthening rib and second is connected and forms the inside additional strengthening of star type, the thickness of the little strengthening rib of first little strengthening rib and second is less than the thickness of the big strengthening rib of first big strengthening rib and second. The outer wind shield structure has large transverse rigidity, good resistance reduction effect after installation, high transverse deformation resistance and good use reliability.

Description

Outer windshield structure of high-speed train

Technical Field

The utility model relates to a high-speed train technical field particularly, relates to an outer wind shield structure of high-speed train.

Background

The high-speed train is a passenger train with the highest running speed of not less than 250 kilometers, and the external windshield structure is used as an important component of the high-speed train and is arranged at the joint of the end parts of two carriages, so that the surface of the train body is smooth and smooth, and the high-speed train plays an important role in reducing drag and noise of the high-speed train. And the rubber outer windshield has better flexible deformation capacity, when a train passes through a curve, the outer windshield provides displacement between two carriages when the train passes through the curve through extrusion deformation, and the outer windshield rebounds to continue to play the roles of reducing drag and noise when the train linearly runs.

Along with the increase of the running speed of the train, the aerodynamic action of the train on the external windshield is more severe. When a train runs at a high speed, the rubber outer windshield structure generates transverse deformation under the action of the pneumatic load, and when the excitation frequency of the pneumatic load is close to the natural frequency of the structure, the resonance phenomenon is easily caused, so that the vibration of the structure is aggravated. In the existing research, the rubber outer windshield structure of the motor train unit has a pneumatic response problem in the use process, when the running speed of a train reaches more than 200km/h, the rubber outer windshield is turned outwards along the direction vertical to the surface of a train body, the severe turning-outwards degree and the surface of the train body form an included angle of 45 degrees, and the rubber outer windshield structure is continuously turned outwards and flexed, and even has a fracture phenomenon. And the outer windshield is arranged at the position of the train end close to the outer surface of the train body, and the deformation vibration of the outer windshield in turn influences the flow field motion around the train end, so that the distribution and the size of the pneumatic load are changed, the pneumatic force at the joint of the end parts of the train is unevenly distributed, and the train running stability is seriously influenced. At the same time, the deformation vibrations of the outer windshield also jeopardize the fatigue life of the structure.

In the prior art, some technical means are adopted or partial improvements are proposed to enhance the transverse rigidity of the outer windshield, so that the deformation of the outer windshield under the action of aerodynamic load is reduced. However, these improvements are not effective in improving the lateral deformation resistance of the outer windshield, and the weight of the original structure is increased in the process of reinforcing the outer windshield, and the structure is complicated to assemble. When the original outer wind shield is assembled, a depression exists between rubber arcs at the top of the opposite vehicle-end outer wind shield, and the existence of the depression causes air to flow through the depression to generate vortexes, so that the pneumatic drag reduction and noise reduction effects of the outer wind shield are weakened.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide an outer windshield structure of high-speed train, which can improve the lateral rigidity of the outer windshield structure, so that the drag reduction effect of the outer windshield structure after installation is better and the lateral deformation resistance is improved, thereby improving the reliability of the outer windshield.

In order to achieve the above purpose, the utility model provides an external wind shield structure of a high-speed train, which comprises a first external wind shield wall, a second external wind shield wall and an external wind shield arc section, wherein two ends of the external wind shield arc section are respectively connected with the first external wind shield wall and the second external wind shield wall to form a U-shaped external wind shield contour, the inner wall of the joint of the first external wind shield wall and the external wind shield arc section is provided with a first small reinforcing rib, the inner wall of the joint of the second external wind shield wall and the external wind shield arc section is provided with a second small reinforcing rib, the inner wall of the root part of the first external wind shield wall is provided with a first large reinforcing rib, the inner wall of the root part of the second external wind shield wall is provided with a second large reinforcing rib and a first small reinforcing rib, the other ends of the second small reinforcing rib, the first large reinforcing rib and the second large reinforcing rib are connected to form a star-shaped internal reinforcing structure, and the thickness of the first small reinforcing rib and the thickness of the second small reinforcing rib are smaller than the thickness of the first large reinforcing rib and the thickness of the second large reinforcing rib.

Furthermore, the intersection point of the first small reinforcing rib, the second small reinforcing rib, the first large reinforcing rib and the second large reinforcing rib is positioned below the connection point of the first small reinforcing rib and the first outer windshield wall and above the connection point of the first large reinforcing rib and the first outer windshield wall.

Furthermore, first little strengthening rib and the little strengthening rib of second set up for outer windshield structure sectional vertical axis symmetry, and first big strengthening rib and the big strengthening rib of second set up for outer windshield structure sectional vertical axis symmetry, and the nodical point of first little strengthening rib, the little strengthening rib of second, first big strengthening rib and the big strengthening rib of second is located outer windshield structure sectional vertical axis.

Furthermore, the first outer wind blocking wall, the second outer wind blocking wall and the outer wind blocking arc section are consistent in thickness, and the first outer wind blocking wall, the second outer wind blocking wall, the outer wind blocking arc section, the first small reinforcing rib, the second small reinforcing rib, the first large reinforcing rib and the second large reinforcing rib are integrally formed.

Furthermore, the roots of the first outer wind baffle wall and the second outer wind baffle wall are connected with an L-shaped fastener through a fastening bolt and a fastener inner side clamping plate, and the outer side of one end of the L-shaped fastener connected with the first outer wind baffle wall and the second outer wind baffle wall is provided with a chamfer angle.

Compared with the prior art, the invention has the following beneficial effects:

by arranging the star-shaped outer windshield inner reinforcing structure consisting of the first small reinforcing ribs, the second small reinforcing ribs, the first large reinforcing ribs and the second large reinforcing ribs in the outer windshield structure, when a train needs a larger longitudinal compression amount, the outer windshield is deformed by the first outer windshield wall on the outer side of the surface of the train body, the second outer windshield wall close to the through passage side and the star-shaped outer windshield inner reinforcing structure, the longitudinal compressibility of the outer windshield structure is increased, and the capability of the train passing through curves is improved; when the train recovers to the straight line driving, the first outer wind baffle wall, the second outer wind baffle wall and the star-shaped inner reinforcing structure of the outer wind baffle rebound to recover the original assembly state, and the functions of reducing drag and noise are continuously exerted. The outer windshield structure improves the transverse rigidity of the outer windshield structure, so that the installed outer windshield structure has better drag reduction effect and improved transverse deformation resistance, and the use reliability of the outer windshield is improved. Moreover, the outer wind shield structure can improve the transverse rigidity of the outer wind shield structure under the condition of not increasing the original structure quality, and meets the design requirement of light weight of the outer wind shield structure of the high-speed train.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a front view of an external windshield structure of a high-speed train in the prior art.

3 fig. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 the 3 plane 3 a 3- 3 a 3 in 3 fig. 3 1 3. 3

Fig. 3 is a cross-sectional view of an external windshield structure according to an embodiment of the present invention.

Fig. 4 is a schematic view of a mounting seat of an external windshield of an end wall of a vehicle body adapted to an external windshield structure of an embodiment of the present invention.

Fig. 5 is a schematic structural view of the external windshield structure after pre-pressing installation according to the embodiment of the present invention.

Wherein the figures include the following reference numerals:

1. a first outer windshield wall; 2. a second outer windshield wall; 3. an outer windshield circular arc segment; 4. a first small reinforcing rib; 5. a second small reinforcing rib; 6. a first large reinforcement rib; 7. the second big reinforcing rib; 8. fastening a bolt; 9. a fastener inner side clamping plate; 10. an L-shaped fastener; 11. chamfering; 100. an outer windshield structure; 200. a carriage; 201. a bolt mounting seat of the right part of the outer windshield; 202. a bolt mounting seat on the upper part of the outer windshield; 203. the bolt mounting base of the left part of the outer windshield; 204. and a bolt mounting seat of the lower part of the outer windshield.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather the intention is merely to facilitate a distinction between corresponding parts. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" and "coupled" and the like are not restricted to direct connections, but may be indirectly connected through other intermediate connections. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

Referring to fig. 3, 4 and 5, a high-speed train external windshield structure according to an embodiment of the present invention. The utility model discloses an outer windshield structure can be obtained through topological optimization by current outer windshield structure. As can be seen from the figure, the outer windshield structure 100 mainly includes a first outer windshield wall 1, a second outer windshield wall 2 and an outer windshield circular arc section 3. The two ends of the outer wind shield arc section 3 are respectively connected with the first outer wind shield wall 1 and the second outer wind shield wall 2 to form a U-shaped outer wind shield outline; a first small reinforcing rib 4 is arranged on the inner wall of the joint of the first outer wind shield wall 1 and the outer wind shield arc section 3; a second small reinforcing rib 5 is arranged on the inner wall of the joint of the second outer windshield wall 2 and the outer windshield circular arc section 3; a first large strengthening rib 6 is arranged on the inner wall of the root part of the first outer windshield wall 1; a second large strengthening rib 7 is arranged on the inner wall of the root part of the second outer windshield wall 2; the other ends of the first small reinforcing rib 4, the second small reinforcing rib 5, the first large reinforcing rib 6 and the second large reinforcing rib 7 are connected to form a star-shaped internal reinforcing structure of the external wind shield; the thicknesses of the first small beads 4 and the second small beads 5 are smaller than the thicknesses of the first large beads 6 and the second large beads 7.

In the high-speed train external windshield structure 100, the first small reinforcing ribs 4 are arranged on the inner wall of the joint of the first external windshield wall 1 and the external windshield arc section 3; a second small reinforcing rib 5 is arranged on the inner wall of the joint of the second outer windshield wall 2 and the outer windshield circular arc section 3; arranging a first large strengthening rib 6 on the inner wall of the root part of the first outer windshield wall 1; a second large strengthening rib 7 is arranged on the inner wall of the root part of the second outer windshield wall 2; the other ends of the first small reinforcing rib 4, the second small reinforcing rib 5, the first large reinforcing rib 6 and the second large reinforcing rib 7 are connected to form a star-shaped internal reinforcing structure of the external wind shield; the thicknesses of the first small reinforcing ribs 4 and the second small reinforcing ribs 5 are smaller than the thicknesses of the first large reinforcing ribs 6 and the second large reinforcing ribs 7; by arranging the star-shaped outer windshield internal reinforcing structure consisting of the first small reinforcing ribs 4, the second small reinforcing ribs 5, the first large reinforcing ribs 6 and the second large reinforcing ribs 7 in the outer windshield structure 100, when a train needs a large longitudinal compression amount, the first outer windshield wall 1 of the outer side of the outer windshield close to the train body surface, the second outer windshield wall 2 close to the through road side and the star-shaped outer windshield internal reinforcing structure can deform, the longitudinal compressibility of the outer windshield structure is increased, and the capability of the train passing through curves is improved; when the train recovers to the straight line driving, the first outer windshield wall 1, the second outer windshield wall 2 and the star-shaped inner reinforcing structure of the outer windshield rebound to recover the original assembly state, and the functions of reducing drag and noise are continuously exerted. The outer wind shield structure 100 improves the transverse rigidity of the outer wind shield structure 100, so that the installed outer wind shield structure 100 has better drag reduction effect and improved transverse deformation resistance, and the use reliability of the outer wind shield is improved.

Specifically, referring to fig. 3, in the present embodiment, the intersection point of the first small bead 4, the second small bead 5, the first large bead 6, and the second large bead 7 is located below the connection point of the first small bead 4 and the first outer windshield wall 1, and above the connection point of the first large bead 6 and the first outer windshield wall 1. The first small reinforcing ribs 4, the first outer windshield wall 1 and the first large reinforcing ribs 6 jointly enclose an approximately triangular area, and the second small reinforcing ribs 5, the second outer windshield wall 2 and the second large reinforcing ribs 7 jointly enclose an approximately triangular area. By the arrangement, the transverse rigidity of the outer wind shield structure 100 is improved, and the transverse deformation resistance of the outer wind shield structure 100 after installation is improved.

Further, referring to fig. 3, in the present embodiment, the first small reinforcing rib 4 and the second small reinforcing rib 5 are symmetrically disposed with respect to the vertical axis of the cross section of the outer windshield structure 100 (see a dotted line a in fig. 3), the first large reinforcing rib 6 and the second large reinforcing rib 7 are symmetrically disposed with respect to the vertical axis of the cross section of the outer windshield structure 100, and the intersection point of the first small reinforcing rib 4, the second small reinforcing rib 5, the first large reinforcing rib 6, and the second large reinforcing rib 7 is located on the vertical axis of the cross section of the outer windshield structure 100.

Referring to fig. 3, in the present embodiment, the first outer windshield wall 1, the second outer windshield wall 2, and the outer windshield circular arc section 3 have the same thickness, and the first outer windshield wall 1, the second outer windshield wall 2, the outer windshield circular arc section 3, the first small reinforcing rib 4, the second small reinforcing rib 5, the first large reinforcing rib 6, and the second large reinforcing rib 7 are integrally formed. Referring to fig. 1 and 2, the thickness of the outer wind-shield wall of the outer wind-shield structure that has now is greater than the thickness of outer wind-shield circular arc section, the utility model discloses a improve current outer wind-shield structure, can be under the condition that does not increase the used material volume of current outer wind-shield structure, set up first outer wind-shield wall 1, second outer wind-shield wall 2 and outer wind-shield circular arc section 3's thickness to be unanimous, set up star type inside additional strengthening in outer wind-shield structure outline to with first outer wind-shield wall 1, second outer wind-shield wall 2, outer wind-shield circular arc section 3, first little strengthening rib 4, the little strengthening rib 5 of second, first big strengthening rib 6 and the big strengthening rib 7 of second adopt integrated into one piece, obtain the outer wind-shield structure 100 of this embodiment. This outer windshield structure 100 can improve outer windshield structure 100's horizontal rigidity under the condition that does not increase original structure quality, makes outer windshield structure 100 drag reduction effect after the installation better and horizontal anti-deformability obtains improving to satisfy the light-weighted design requirement of high-speed train outer windshield structure 100.

Specifically, referring to fig. 3, in the present embodiment, the root portions of the first and second

outer windshield walls

1 and 2 are each connected to an L-shaped fastener 10 via a fastening bolt 8 and a fastener inner clip 9, the L-shaped fastener 10 is provided with bolt holes, and the outer windshield structure is integrally mounted on the end portion of a car 200 of a train via bolts. The L-shaped fastener 10 is further provided with a chamfer 11 at the outer side of one end connected with the first outer windshield wall 1 and the second outer windshield wall 2, so that the influence of the L-shaped fastener 10 on a flow field can be reduced, and the flow guide effect is achieved.

Fig. 4 shows an outer windshield mounting seat on the end wall of the vehicle compartment 200 adapted to an outer windshield structure, bolts are distributed on the outer windshield mounting seat, the outer windshield mounting seat is fixed on the end wall of the vehicle compartment 200 by welding, and the outer windshield mounting seat on the end wall of the vehicle compartment 200 is four parts, namely an outer windshield right part bolt mounting seat 201, an outer windshield upper part bolt mounting seat 202, an outer windshield left part bolt mounting seat 203 and an outer windshield lower part bolt mounting seat 204.

When the outer windshield structure is installed, the top of the arc section 3 of the outer windshield is pre-pressed to eliminate the depressions at the two opposite arcs, as shown in fig. 5; when the outer windshield structure is installed and fastened, the right outer windshield structure, the upper outer windshield structure and the left outer windshield structure are installed firstly, the outer windshield installation seat close to the outer surface of the carriage 200 is fastened firstly, and then the inner outer windshield installation seat is fastened; and finally, installing a lower side external wind shield structure.

To current outer windshield structure (its structure is shown in fig. 1 and fig. 2) and the utility model discloses an outer windshield structure, under same given constraint and load condition, test its lateral deformation and first-order natural frequency respectively, its test result is shown as follows:

according to the test results, the transverse deformation of the external windshield structure of the utility model is obviously reduced compared with the existing external windshield structure under the same given constraint and load conditions, which shows that the transverse rigidity of the external windshield structure of the utility model is larger than that of the original external windshield structure; according to the test result, the first-order natural frequency of the external windshield structure of the utility model is also obviously greater than that of the existing external windshield structure.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an outer wind-shield structure of high-speed train, its characterized in that, including first outer wind-shield wall (1), the outer wind-shield wall of second (2) and outer wind-shield arc section (3), the both ends of outer wind-shield arc section (3) respectively with first outer wind-shield wall (1) with outer wind-shield wall of second (2) are connected and form the outer wind-shield profile of U type, first outer wind-shield wall (1) with outer wind-shield arc section (3) junction inner wall is equipped with first little strengthening rib (4), the outer wind-shield wall of second (2) with outer wind-shield arc section (3) junction inner wall is equipped with little strengthening rib of second (5), the root inner wall of first outer wind-shield wall (1) is equipped with first big strengthening rib (6), the root inner wall of the outer wind-shield wall of second (2) is equipped with big strengthening rib (7), first little strengthening rib (4) of second little strengthening rib (5), The other end of the first large reinforcing rib (6) and the other end of the second large reinforcing rib (7) are connected to form a star-shaped internal reinforcing structure, and the thickness of the first small reinforcing rib (4) and the second small reinforcing rib (5) is smaller than that of the first large reinforcing rib (6) and the second large reinforcing rib (7).

2. The external windshield structure of the high-speed train according to claim 1, wherein the intersection point of the first small reinforcing rib (4), the second small reinforcing rib (5), the first large reinforcing rib (6) and the second large reinforcing rib (7) is located below the connection point of the first small reinforcing rib (4) and the first external windshield wall (1) and above the connection point of the first large reinforcing rib (6) and the first external windshield wall (1).

3. The external windshield structure of the high-speed train as recited in claim 1, wherein the first small reinforcing rib (4) and the second small reinforcing rib (5) are symmetrically arranged relative to the vertical axis of the external windshield structure section, the first large reinforcing rib (6) and the second large reinforcing rib (7) are symmetrically arranged relative to the vertical axis of the external windshield structure section, and the intersection point of the first small reinforcing rib (4), the second small reinforcing rib (5), the first large reinforcing rib (6) and the second large reinforcing rib (7) is located on the vertical axis of the external windshield structure section.

4. The high-speed train external windshield structure according to claim 1, wherein the first external windshield wall (1), the second external windshield wall (2) and the external windshield arc section (3) are uniform in thickness, and the first external windshield wall (1), the second external windshield wall (2), the external windshield arc section (3), the first small reinforcing rib (4), the second small reinforcing rib (5), the first large reinforcing rib (6) and the second large reinforcing rib (7) are integrally formed.

5. The high-speed train external windshield structure according to any one of claims 1 to 4, wherein roots of the first external windshield wall (1) and the second external windshield wall (2) are connected with an L-shaped fastener (10) through a fastening bolt (8) and a fastener inner side clamping plate (9), and the outer side of one end of the L-shaped fastener (10) connected with the first external windshield wall (1) and the second external windshield wall (2) is provided with a chamfer (11).