CN114148366A

CN114148366A - Double-layer square tube combined energy absorption structure for rail vehicle collision energy absorption

Info

Publication number: CN114148366A
Application number: CN202111492177.4A
Authority: CN
Inventors: 金希红; 陆军
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-03-08

Abstract

The invention discloses a double-layer square tube combined energy absorption structure for energy absorption of rail vehicle collision, which comprises four parts, namely an outer tube, an inner tube, a partition plate and an end plate, wherein the partition plate is uniformly distributed between the inner tube and the outer tube along the length direction of the energy absorption structure, the end plate is arranged at least at the top of the energy absorption structure in the length direction, namely the impacted end of the energy absorption structure, the energy absorption structure also comprises an induction groove, and the induction groove is formed in the middle of the position of the first partition plate from top to bottom of the energy absorption structure and the position of the top of the energy absorption structure. The double-layer square tube combined energy absorption is adopted, and the inner tube and the outer tube can generate stable buckling deformation under axial dynamic impact through the guiding action of the induction guide groove and the partition plate. The double-layer square tube energy absorption structure realizes the simultaneous energy absorption of the two layers of square tubes, can improve the energy absorption capacity of the energy absorption structure by changing the shapes, the thicknesses and the offset angles of the inner tube and the partition plate, can be provided with the corresponding double-layer tube combined energy absorption structure according to the speed magnitude of different trains, and has wide application range.

Description

Double-layer square tube combined energy absorption structure for rail vehicle collision energy absorption

Technical Field

The invention relates to the technical field of collision energy absorption, in particular to a double-layer square tube combined energy absorption structure for rail vehicle collision.

Background

"the country is in high traffic, the railway is in the first place. The railway transportation has unique advantages in the field of transportation, and the problem of the running safety of trains is more and more emphasized while the rail trains are continuously developed. The passive safety protection technology of the train also becomes a research hotspot of experts and scholars at home and abroad, the train crashworthiness is also listed as a mandatory standard by strong countries in the world, and the crashworthiness level is determined by the train energy absorption capacity meeting the passive safety requirement, so that the detailed design and optimization of main energy absorption components in the train are required.

According to the invention, by researching the axial load mechanical response theory of the metal thin-wall square tube, the energy absorption ratio is found to be increased along with the reduction of the side length, so that the inner tube is added in the thin-wall square tube to increase the ratio energy absorption, the side wall of the square tube is provided with the induction groove, and the middle of the energy absorption structure is connected by the partition plate, so that the inner square tube and the outer square tube generate stable deformation between every two partition plates. Compared with the traditional single-layer square tube with the partition plates, the inner space of the square tube is fully utilized, the energy absorption characteristic under the axial load can be improved under the same size, and the impact resistance of the energy absorption structure is effectively improved.

Disclosure of Invention

The invention aims to provide a double-layer square tube combined energy absorption structure for rail vehicle collision.

In order to achieve the purpose, the invention provides a double-layer square tube combined energy absorption structure for energy absorption of rail vehicle collision, which comprises four parts, namely an outer tube, an inner tube, a partition plate and an end plate, wherein the partition plate is uniformly distributed between the inner tube and the outer tube along the length direction of the energy absorption structure, the end plate is arranged at least at the top of the energy absorption structure in the length direction, namely the impacted end of the energy absorption structure, the energy absorption structure further comprises an induction groove, and the induction groove is formed in the middle of the position of the first partition plate from top to bottom of the energy absorption structure and the position of the top of the energy absorption structure.

In a specific embodiment, the outer pipe and the inner pipe have the same central line, the partition plate is welded on the inner pipe, the number of the welding seam grooves corresponding to the number of the partition plates is formed in the outer pipe wall according to the vertical distance between the partition plate and the inner pipe, and then the partition plate is welded with the welding seam grooves on the corresponding outer pipe wall, so that the phase deformation length is ensured to be the same while the centering of the inner pipe and the outer pipe is ensured.

In a specific embodiment, the induction groove comprises an outer pipe induction groove arranged on the pipe wall of the outer pipe and an inner pipe induction groove arranged on the pipe wall of the inner pipe, and the height positions of the outer pipe induction groove and the inner pipe induction groove are the same.

In a specific embodiment, an end plate is also arranged at the bottom of the energy absorbing structure in the length direction, the bottom end of the energy absorbing structure is used for being fixed at the end of a train, and the top end of the energy absorbing structure is used for being impacted.

According to the invention, the inner pipe and the outer pipe can generate stable buckling deformation under axial dynamic impact through the guiding action of the inducing groove and the partition plate.

The inner pipe and the outer pipe are connected through the partition plates in a welded mode, the partition plates divide the inner pipe and the outer pipe into even parts, the induction grooves are formed in the positions away from the end plates, the first buckling deformation of the main energy absorption structure occurs in the positions of the induction grooves, and the main energy absorption structure sequentially generates progressive folds towards the direction of the bottom end plate along with the impact process. The combined energy absorption structure generates buckling wrinkles, the deformation mode is stable and orderly, the buckling deformation is complete, and stable and sustainable deformation energy absorption is realized.

Furthermore, the double-layer square tube combined energy absorption structure of the railway vehicle is fixedly installed through the end plate at one end, the other end of the double-layer square tube combined energy absorption structure is impacted, and impact force is transmitted through the end plate in the collision energy absorption process to start continuous deformation energy absorption.

Furthermore, the shape, the thickness and the offset angle of the inner pipe can be designed and optimized according to different impact magnitudes.

Compared with the prior art, the invention has the advantages that:

the energy absorption structure has the advantages that the two layers of pipes can absorb energy simultaneously, the energy absorption capacity of the energy absorption structure can be improved by changing the shapes, the thicknesses and the offset angles of the inner pipe and the partition plate, the corresponding double-layer pipe combined energy absorption structure can be arranged according to the speed magnitude of different trains, and the application range is wide.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, 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 an isometric view of a dual-layer square tube modular energy absorbing structure for energy absorption of a railway vehicle according to a preferred embodiment of the present invention;

FIG. 2 is a schematic diagram of the matching of an inner pipe and an outer pipe of a double-layer square pipe combined energy absorption structure for energy absorption of a railway vehicle, which is disclosed by the preferred embodiment of the invention;

FIG. 3 is a schematic diagram of the combination of the inner tube and the baffle of the double-layer square tube combined energy absorption structure for energy absorption of a railway vehicle according to the preferred embodiment of the invention.

1. An end plate; 2. an outer tube induction groove; 3. an outer tube; 4. welding a seam groove; 5. a partition plate; 6. an inner tube; 7. an inner tube induction groove;

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1, an embodiment of the present invention discloses a guide frame structure for multi-level energy absorption of a rail vehicle, including: an end plate 1; an outer tube induction groove 2; an outer tube 3; a weld groove 4; a partition 5; an inner tube 6; an inner tube induction groove 7; the energy absorption structure is made of carbon steel, the end plate 1 is an impacted end, the end plate on the other side is arranged at the front end of a railway vehicle body, the inner pipe 6 and the partition plate 5 are welded together, and the outer pipe 3 is provided with a weld groove 4. At the beginning of the impact, the energy absorption structure gradually generates progressive folds towards the direction of the bottom end plate by the action of the outer tube induction groove 2 and the inner tube induction groove 7.

In this embodiment, when a collision occurs, the outer tube induction groove 2 and the inner tube induction groove 7 start to wrinkle, the energy absorption structure gradually generates progressive wrinkles towards the bottom end plate direction, the number of the generated wrinkles is the same as that of the partition plates 5, and the energy absorption structure can be completely compacted, under the same size, the energy absorption characteristic under an axial load can be improved, the collision resistance of the energy absorption structure is effectively improved, and under the same condition, the collision energy absorption capacity is improved by more than 45% compared with that of a traditional single-layer square tube.

The double-layer square tube combined energy absorption is adopted, and the inner tube and the outer tube can generate stable buckling deformation under axial dynamic impact through the guiding action of the induction guide groove and the partition plate. The double-layer square tube energy absorption structure realizes the simultaneous energy absorption of the two layers of square tubes, can improve the energy absorption capacity of the energy absorption structure by changing the shapes, the thicknesses and the offset angles of the inner tube and the partition plate, can be provided with the corresponding double-layer tube combined energy absorption structure according to the speed magnitude of different trains, and has wide application range.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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 a double-deck side's pipe combination formula energy-absorbing structure for rail vehicle collision energy-absorbing, a serial communication port, including four parts of outer tube, inner tube, baffle and end plate, the baffle distributes uniformly between the outer tube including along the length direction of energy-absorbing structure, and is provided with the end plate at the length direction top of energy-absorbing structure promptly the impacted end of energy-absorbing structure promptly, the energy-absorbing structure still includes the induction groove, and the induction groove is opened from the energy-absorbing structure top from the centre of down first baffle position and energy-absorbing structure top position.

2. The energy absorbing structure of claim 1, wherein the outer tube and the inner tube have the same center line, the spacers are welded to the inner tube, and the outer tube wall is provided with weld grooves corresponding to the number of the spacers according to the vertical distance between the spacers, and then the spacers and the corresponding weld grooves on the outer tube wall are welded together, so that the inner tube and the outer tube are centered and the phase deformation lengths are the same.

3. The energy absorbing structure of claim 1, wherein the induction groove comprises an outer pipe induction groove formed on the wall of the outer pipe and an inner pipe induction groove formed on the wall of the inner pipe, and the outer pipe induction groove and the inner pipe induction groove have the same height.

4. The double-layer square tube combined energy absorption structure for rail vehicle collision energy absorption according to claim 1, wherein an end plate is also arranged at the bottom of the energy absorption structure in the length direction, the bottom end of the energy absorption structure is used for being fixed at the end of a train, and the top end of the energy absorption structure is used for being impacted.