CN112373503A

CN112373503A - Novel high energy-absorbing alloy elastic energy absorber cylinder body of rail train

Info

Publication number: CN112373503A
Application number: CN202011234506.0A
Authority: CN
Inventors: 韩福生; 程敬卿
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-07
Filing date: 2020-11-07
Publication date: 2021-02-19

Abstract

The invention relates to a novel high-energy-absorption alloy elastic energy absorber cylinder body of a rail train, which comprises an outer shell, wherein a telescopic sleeve shell is screwed in the outer shell, an inner pipe is fixedly connected in the sleeve shell, and a telescopic piston rod is arranged in the inner pipe in a sliding manner. According to the invention, the shell internally provided with the first spring is screwed on the outer side of the shell, so that when the shell is impacted, the shell is pushed to retract, the first spring is extruded and rotates along the shell to be retracted, the impact force is buffered and absorbed for the first time, when the shell is pushed to the inner side of the shell, the insertion pipe is inserted into the valve of the inner pipe to communicate the inner pipe and the hydraulic cavity, the piston rod penetrates deeply along the inner pipe and injects hydraulic oil into the hydraulic cavity to increase the pressure to restore the energy storage of the energy absorber, the longitudinal impact force in a train workshop is buffered and absorbed for the second time, and the two sections shrink gradually, so that more impact force can be absorbed, and the energy absorption strength of the energy absorber is increased.

Description

Novel high energy-absorbing alloy elastic energy absorber cylinder body of rail train

Technical Field

The invention relates to the technical field of energy absorbers, in particular to a novel high-energy-absorption alloy elastic energy absorber cylinder body of a rail train.

Background

The requirement of rail transit on buffering energy-absorbing materials can be divided into two aspects, namely a locomotive passive safety protection system and an infrastructure buffering structure. For a high-speed train, the passive safety protection system comprises a vehicle body buffer structure and an anti-impact buffer energy absorber, wherein the vehicle body buffer structure absorbs impact energy through the integral plastic deformation of a vehicle body secondary structure or the end part of the vehicle body, and the anti-impact buffer energy absorber absorbs the impact energy through the plastic deformation of a high-energy-absorbing material in the energy absorber. From the principle of the two energy-absorbing structures, the high energy-absorbing alloy can be used as a structure or an energy-absorbing material, and the high unit mass energy-absorbing property and the toughness of the high energy-absorbing alloy are favorable for greatly improving the safety of passive impact of the locomotive.

The gas-liquid buffer is used as a main buffering energy absorption module for high-speed railways and subways, has the excellent characteristics of large capacity, high energy absorption rate, capability of continuously and stably absorbing longitudinal impact kinetic energy of train workshops and the like, and can meet various performance requirements under the conditions of high speed, low speed and heavy load. The buffer energy-absorbing function of the gas-liquid buffer is mainly realized by the relative motion of two media, namely gas and liquid, when the buffer is pressed, the liquid medium in the buffer flows into the other liquid chamber from one liquid chamber through a fine throttling hole and a pressurizing valve, and simultaneously pushes a piston to compress gas, in the process, part of external impact kinetic energy is consumed by the friction between the liquid and the inner wall of metal, and the other part of impact energy is converted into the compression potential energy of the gas to be used as the restoring force of the buffer.

The existing energy absorber cylinder body can only contract once, so that impact energy absorbed by contraction is limited to a certain extent, and more energy can be absorbed by the existing energy absorber cylinder body only by synchronous matching of a plurality of energy absorber cylinder bodies.

Disclosure of Invention

The invention provides a novel high-energy-absorption alloy elastic energy absorber cylinder body of a rail train, aiming at meeting the requirements of repeatedly contracting and absorbing the energy absorber cylinder body and buffering more energy.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

the utility model provides a novel high energy-absorbing alloy elasticity energy absorber cylinder body of rail train, includes the shell, the inside spiro union of shell has the telescopic cover shell, the inside fixedly connected with inner tube of this cover shell, it is provided with flexible piston rod to slide in the inner tube, wherein: the casing rotates to contract to the innermost side of the outer shell and is used for inserting the insertion pipe in the outer shell into the valve at the bottom of the inner pipe, and the inner pipe is communicated with the hydraulic cavity in the outer shell to perform internal hydraulic oil transfer and pressurization, wherein: the inner pipe is communicated with the hydraulic cavity, the piston rod is retracted inwards along the inner pipe and used for injecting hydraulic oil into the hydraulic cavity, and nitrogen inside the piston rod is extracted from the shell to enter the inner pipe from the side face through a suction hole in the side face of the outer end of the inner pipe.

The inside of the outer shell is accommodated with a first spring which is used for pushing the sleeve to move outwards.

The insertion pipe protrudes out of the inner side of the shell, is inserted into the valve of the inner pipe when the first spring is contracted to the shortest length and is used for jacking the valve body in the valve, and a pressurization valve for pressurizing hydraulic oil is arranged in the insertion pipe.

The cover shell is in the front end of inner tube is provided with dustproof pad and sealing washer and is used for right the cover shell with nitrogen gas between the inner tube seals.

The piston rod is rotatably connected with the shell through a bearing in sliding connection.

The shell, the casing, the inner tube and the piston rod are all made of high energy absorption alloy.

The invention has the beneficial effects that:

according to the invention, the shell internally provided with the first spring is screwed on the outer side of the shell, so that when the shell is impacted, the shell is pushed to retract, the first spring is extruded and rotates along the shell to be retracted, the impact force is buffered and absorbed for the first time, when the shell is pushed to the inner side of the shell, the insertion pipe is inserted into the valve of the inner pipe to communicate the inner pipe and the hydraulic cavity, the piston rod penetrates deeply along the inner pipe and injects hydraulic oil into the hydraulic cavity to increase the pressure to restore the energy storage of the energy absorber, the longitudinal impact force in a train workshop is buffered and absorbed for the second time, and the two sections shrink gradually, so that more impact force can be absorbed, and the energy absorption strength of the energy absorber is increased.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is an overall perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the invention in an overall extended state;

FIG. 3 is a schematic cross-sectional view of the invention in its overall contracted state;

fig. 4 is a partially enlarged schematic view of a portion a of fig. 3.

In the figure: 1. a housing; 11. inserting a tube; 12. a hydraulic chamber; 13. a first spring; 14. a pressure increasing valve; 2. a housing; 21. a dust-proof pad; 22. a seal ring; 3. an inner tube; 31. a valve; 32. a valve body; 33. a suction hole; 4. a piston rod.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be described more clearly and more completely with reference to the drawings in the following embodiments, and it is understood that the described embodiments are only a part of the present invention, rather than all of the present invention, and based on the embodiments, other embodiments obtained by those skilled in the art without inventive exercise are within the protection scope of the present invention.

As shown in fig. 1 to 4, a novel high energy-absorbing alloy elastic energy absorber cylinder body of rail train, including shell 1, the inside spiro union of shell 1 has telescopic cover shell 2, and the inside fixedly connected with inner tube 3 of this cover shell 2 slides in the inner tube 3 and is provided with flexible piston rod 4, wherein: the casing 2 is contracted to the innermost side of the outer casing 1 by rotation for inserting the insertion tube 11 in the outer casing 1 into the valve 31 at the bottom of the inner tube 3, and the inner tube 3 is communicated with the hydraulic cavity 12 in the outer casing 1 for internal hydraulic oil transfer and pressurization, wherein: the inner tube 3 communicates with the hydraulic chamber 12, and the piston rod 4 is retracted inwardly along the inner tube 3 for injecting hydraulic oil into the hydraulic chamber 12, and the nitrogen gas inside is extracted from the side shell 2 into the inner tube 3 through the suction holes 33 in the outer end side of the inner tube 3.

The interior of the housing 1 accommodates a first spring 13, which first spring 13 is used to urge the casing 2 to move outwards. The first function of first spring 13 is to slowly retract cover 2 so that when cover 2 is squeezed, retraction is slowed, i.e., a first segment of the impact force is cushioned, and the second function of first spring 13 is to urge cover 2 to rotate outwardly along housing 1 to effect a return after the first segment has been retracted.

The insertion tube 11 protrudes from the inside of the housing 1 and is inserted into the valve 31 of the inner tube 3 for lifting up the valve body 32 in the valve 31 when the first spring 13 is contracted to the minimum, and the pressure increasing valve 14 for increasing the pressure of the hydraulic oil is provided in the insertion tube 11. When the shell 2 is compressed and rotated and extends into the shell 1, the first spring 13 in the shell 1 is squeezed, when the first spring 13 is squeezed to be in a near shortest state, the insertion tube 11 which is arranged in the shell 1 and protrudes out of the inner wall of the shell 1 is inserted into the valve 31 of the inner tube 3 fixed with the shell 2, the valve body 32 in the valve 31 of the inner tube 3 is jacked up, the valve body 32 of the jacking opening is separated from the valve 31, so that the insertion tube 11 is communicated with the inner tube 3, hydraulic oil in the inner tube 3 and squeezed by the piston rod 4 enters the insertion tube 11 along the valve 31 and is transferred into the hydraulic cavity 12 of the shell 1 after being pressurized by the pressurization valve 14 in the insertion tube 11, the pressurization use of the hydraulic oil is completed, when external pressure does not exist subsequently, the pressure of the hydraulic oil in the hydraulic cavity 12 is higher than the pressure in the inner tube 3, and the hydraulic oil in the hydraulic cavity 12 is transferred to the inner tube 3 reversely through the insertion tube 11 and, piston rod 4 in the inner tube 3 outwards extrudes, simultaneously, the 4 outsides of piston rod promote nitrogen gas and pour into in casing 2 in the inner tube 3, make piston rod 4 slowly outwards extend until piston rod 4 is blockked by 3 front ends of inner tube, simultaneously piston rod 4 side also blocks suction hole 33, at this moment, the piston rod 4 that can't carry out the outward movement again drives inner tube 3, inner tube 3 drives casing 2 and all outwards removes, outwards slowly rotates along 1 inner wall screw thread of shell 1 from casing 2, thereby promote casing 2 and outwards remove and make it slowly to resume, carry out power storage for next use.

The jacket 2 is provided with a dust-proof packing 21 and a packing 22 at the front end of the inner tube 3 for sealing nitrogen gas between the jacket 2 and the inner tube 3. The dustproof pad 21 and the sealing ring 22 arranged at the front end of the casing 2 are used for sealing between the casing 2 and the inner pipe 3, preventing the nitrogen inside from leaking out, and ensuring the supply of the nitrogen in the inner pipe 3.

The piston rod 4 is rotatably connected to the housing 2 by a bearing slidably connected thereto. One end of the piston rod 4 is fixedly connected with the flange plate through a bearing, the flange plate is used for fixedly connecting the train body of the train, the piston rod 4 is connected with the bearing in a sliding mode, so that the piston rod 4 can stretch out and draw back in the inner pipe 3, the bearing rotates to connect the casing 2, and the piston rod 4 can rotate to ensure that the use of the train body during torsion can be ensured.

The outer shell 1, the shell 2, the inner tube 3 and the piston rod 4 are all made of high energy-absorbing alloy. The high energy-absorbing alloy has high unit mass energy-absorbing property and high toughness, can absorb part of impact force, and can ensure the long-term use of the shell 1, the shell 2, the inner tube 3 and the piston rod 4.

The working process is as follows: when contracting, piston rod 4 atress is retrieved, but because the inside sealed state that is the hydraulic oil packing of inner tube 3 to piston rod 4 promotes inner tube 3 and retrieves, and inner tube 3 drives the cover shell 2 shrink of fixing with it, and cover shell 2 rotates through the screw along the inner wall of shell 1 and retrieves, and compresses the inside first spring 13 of shell 1, and until cover shell 2 suppresses the spring to minimum, accomplishes the shrink energy-absorbing of first section.

Meanwhile, the valve 31 in the inner tube 3 is inserted into the insertion tube 11 in the outer shell 1, the connection between the hydraulic cavity 12 arranged outside the outer shell 1 and the inner tube 3 is broken through, so that the piston is recovered, hydraulic oil is extruded through the valve 31 and the pressure increasing valve 14 in the insertion tube 11 and is injected into the hydraulic cavity 12 of the outer shell 1 until the front end rubber pad of the piston rod 4 contacts the inner end of the inner tube 3, and at the moment, the outer end of the inner tube 3 is completely sucked into nitrogen in the shell 2 from the suction hole 33 on the side surface, and the contraction energy absorption of the second section is completed.

When the energy absorber cylinder recovers, hydraulic oil with high pressure in the hydraulic cavity 12 is injected into the inner tube 3 through the booster valve 14 and the valve 31, the piston rod 4 is pushed to move outwards to recover by matching with the suction force of nitrogen recovery with low pressure, and when the piston rod 4 moves to the outermost end of the inner tube 3, the shell 2 is screwed and rotates outwards along the inner wall of the shell 1 to recover under the action of the spring, so that the recovery of the energy absorber cylinder is completed.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a novel high energy-absorbing alloy elasticity energy absorber cylinder body of rail train which characterized in that: including shell (1), the inside spiro union of shell (1) has telescopic cover shell (2), and the inside fixedly connected with inner tube (3) of this cover shell (2), it is provided with flexible piston rod (4) to slide in inner tube (3), wherein: the jacket (2) is contracted to the innermost side of the outer shell (1) in a rotating way for inserting the insertion pipe (11) in the outer shell (1) into a valve (31) at the bottom of the inner pipe (3), and the inner pipe (3) is communicated with a hydraulic cavity (12) in the outer shell (1) to carry out internal hydraulic oil transfer and pressurization, wherein: the inner tube (3) is communicated with the hydraulic cavity (12), the piston rod (4) is inwards contracted along the inner tube (3) and is used for injecting hydraulic oil into the hydraulic cavity (12), and the inner tube (3) is laterally close to a suction hole (33) on the side face of the outer end, so that nitrogen inside the shell (2) is extracted and enters the inner tube (3).

2. The novel high-energy-absorption alloy elastic energy absorber cylinder body of the rail train as claimed in claim 1, wherein: the interior of the outer shell (1) accommodates a first spring (13), and the first spring (13) is used for pushing the shell (2) to move outwards.

3. The novel high-energy-absorption alloy elastic energy absorber cylinder body of the rail train as claimed in claim 2, characterized in that: the inserting pipe (11) protrudes out of the inner side of the shell (1), the inserting pipe is inserted into the inner pipe (3) when the first spring (13) contracts to the shortest extent, the valve body (32) in the valve (31) is used for jacking up the valve (31), and a pressurizing valve (14) for pressurizing hydraulic oil is arranged in the inserting pipe (11).

4. The novel high-energy-absorption alloy elastic energy absorber cylinder body of the rail train as claimed in claim 1, wherein: the cover case (2) is arranged at the front end of the inner pipe (3) and provided with a dustproof pad (21) and a sealing ring (22) for sealing nitrogen between the cover case (2) and the inner pipe (3).

5. The novel high-energy-absorption alloy elastic energy absorber cylinder body of the rail train as claimed in claim 1, wherein: the piston rod (4) is rotatably connected with the shell (2) through a bearing (41) in sliding connection.

6. The novel high-energy-absorption alloy elastic energy absorber cylinder body of the rail train as claimed in claim 1, wherein: the outer shell (1), the casing (2), the inner tube (3) and the piston rod (4) are all made of high energy-absorbing alloy.