CN114135615A - Gas-liquid buffering energy-absorbing device - Google Patents
Gas-liquid buffering energy-absorbing device Download PDFInfo
- Publication number
- CN114135615A CN114135615A CN202111456034.8A CN202111456034A CN114135615A CN 114135615 A CN114135615 A CN 114135615A CN 202111456034 A CN202111456034 A CN 202111456034A CN 114135615 A CN114135615 A CN 114135615A
- Authority
- CN
- China
- Prior art keywords
- shell
- liquid
- cavity
- wall
- cylinder body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 124
- 230000003139 buffering effect Effects 0.000 title claims abstract description 35
- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 239000012530 fluid Substances 0.000 claims abstract description 50
- 239000000872 buffer Substances 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 32
- 238000013016 damping Methods 0.000 claims description 26
- 238000010521 absorption reaction Methods 0.000 abstract description 25
- 239000003921 oil Substances 0.000 description 18
- 238000007906 compression Methods 0.000 description 17
- 230000006835 compression Effects 0.000 description 16
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000010720 hydraulic oil Substances 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/062—Bi-tubular units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/516—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics resulting in the damping effects during contraction being different from the damping effects during extension, i.e. responsive to the direction of movement
Abstract
The invention provides a gas-liquid buffering energy-absorbing device, comprising: a cylinder body; a housing: the whole body is arranged in the cylinder body, and the opening end of the shell and the opening end of the cylinder body are arranged at intervals in the same direction; force transmission rod: the first end is inserted into the shell through the open end of the shell and can move relative to the shell, and the second end is positioned outside the open end of the cylinder body; the force transmission rod forms a piston cavity, and a piston is arranged in the piston cavity; a first liquid cavity is formed between the first end of the force transmission rod and the closed end of the shell; the piston divides the piston cavity into two cavities, including an air cavity far away from the shell and a second liquid cavity close to the shell; the outer wall of the force transfer rod is in clearance with the inner wall of the cylinder body and is attached to the opening end of the cylinder body to form a third liquid cavity; the force transmission rod is provided with a first fluid channel which is communicated with the first liquid cavity and the second liquid cavity; a second fluid channel is arranged between the first end of the force transfer rod and the shell and is communicated with the first liquid cavity and the third liquid cavity. The gas-liquid buffering energy absorption device achieves the purpose that one gas-liquid buffering part absorbs impact energy in two directions of stretching and compressing.
Description
Technical Field
The invention belongs to the technical field of railway vehicle buffering devices, and particularly relates to a gas-liquid buffering energy-absorbing device.
Background
The gas-liquid buffer is used for absorbing external impact and vibration energy, plays the effect of relaxing impact, vibration isolation and safety protection, and the gas-liquid buffer belongs to fluid type buffer, under the exogenic action, relies on fluid circulation production damping force between a plurality of cavities, and the dissipation of external kinetic energy conversion for heat energy goes out. The gas-liquid buffer has the characteristics of high damping-speed correlation, the damping force of the gas-liquid buffer changes along with the change of the external action speed or the energy input, and the gas-liquid buffer has the advantages of strong working condition adaptability, large capacity and high energy absorption rate compared with other types of buffers.
Conventional gas-liquid dampers can only be compressed, i.e. can only absorb impact energy in case of compression. Meanwhile, due to the restoration requirement, the restoration energy stored in the internal gas spring is released during the return stroke after compression, and the part of energy is restored into the kinetic energy of an external object, so that the full dissipation of the external impact kinetic energy is not facilitated.
Chinese patent CN101639106B discloses a piston-type hydro-pneumatic buffer, which realizes buffering and energy absorption by the cooperation of an air cavity and an oil cavity. The first liquid chamber and the second liquid chamber are both constructed by a piston rod and an oil cylinder, and the volume of the first liquid chamber is larger than that of the second liquid chamber. With this construction, the hydropneumatic shock absorber can only absorb energy under compression. Specifically, when the piston rod is compressed, hydraulic oil enters the second liquid cavity and the third liquid cavity through the first liquid cavity and synchronously compresses the air cavity; when the external force disappears, each oil cavity automatically restores to the original position. When the second liquid cavity is stretched, the second liquid cavity is compressed, and the second liquid cavity is only used as an expansion cavity of oil liquid in design to enhance the sealing function, so that the required buffering performance cannot be embodied.
In addition, to the operating mode that needs tensile energy-absorbing, need set up other buffer element alone, use with the gas-liquid buffer combination. The system scheme combining a plurality of buffer elements has a complex and redundant structure, and due to the limitation of space size, most of the buffer elements for realizing energy absorption in the stretching direction are non-gas-liquid type buffer devices, and the energy absorption capacity in the stretching direction is greatly reduced compared with the energy absorption effect with large gas-liquid capacity and high working condition adaptability.
Disclosure of Invention
The invention aims to solve one of the technical problems and provides a gas-liquid buffering energy-absorbing device which can have an energy-absorbing effect under both tension and compression working conditions.
In order to achieve the purpose, the invention adopts the technical scheme that:
a gas-liquid buffering energy-absorbing device comprises:
a cylinder body: comprises a closed end and an open end;
a housing: the whole body is arranged in the cylinder body and comprises a closed end and an open end, the open end of the shell and the open end of the cylinder body are arranged at intervals in the same direction, and the closed end of the shell is attached to the closed end of the cylinder body in an initial state;
force transmission rod: the first end is inserted into the shell through the open end of the shell and can move relative to the shell, and the second end is positioned outside the open end of the cylinder body; the force transmission rod is of a hollow structure and forms a piston cavity, and a piston is arranged in the piston cavity;
a first liquid cavity is formed between the first end of the force transmission rod and the closed end of the shell; the piston divides the piston cavity into two cavities, including an air cavity far away from the shell and a second liquid cavity close to the shell; the outer wall of the force transfer rod is in clearance with the inner wall of the cylinder body and is attached to the opening end of the cylinder body to form a third liquid cavity;
a first fluid channel is arranged at the first end of the force transmission rod and is communicated with the first liquid cavity and the second liquid cavity; a second fluid channel is arranged between the first end of the force transfer rod and the shell and is communicated with the first liquid cavity and the third liquid cavity.
In some embodiments of the invention, the first end of the force transfer rod comprises a joint section jointed with the inner wall of the shell, the outer diameter of the joint section is larger than the caliber of the opening end of the shell, and the outer wall of the force transfer rod shrinks radially along the direction from the joint section to the opening end of the shell to form a gap with the inner wall of the shell;
the second fluid passage includes:
damping channel: the first end of the force transmission rod is communicated with the first liquid cavity;
first sub-fluid channel: the first end of the force transmission rod is communicated with the first liquid cavity;
a clearance channel: the damping channel is formed between the outer wall of the force transmission rod and the inner wall of the shell and is communicated with the damping channel and the sub first fluid channel;
second sub-fluid channel: the gap channel is arranged at the opening end of the shell and is communicated with the gap channel;
and a one-way valve is arranged in the first sub-fluid channel and is opened when the pressure of the first liquid cavity is greater than the pressure of the second liquid cavity.
In some embodiments of the invention, the damping channel has an inner diameter smaller than an inner diameter of the first sub fluid channel.
In some embodiments of the invention, a booster valve is disposed within the first fluid passageway.
In some embodiments of the present invention, the bottom of the housing is provided with a throttle lever, and the position and the size of the throttle lever are configured as follows: the throttle lever is insertable into the first fluid passage during movement of the force transfer lever relative to the housing.
In some embodiments of the present invention, the sealing structure further comprises a sealing structure, wherein the sealing structure comprises one or any combination of the following sealing rings:
the first sealing ring is arranged along the outer wall of the shell and is attached to the inner wall of the cylinder body;
the second sealing ring is arranged along the outer wall of the first end of the force transmission rod and is attached to the inner wall of the shell;
the third sealing ring is arranged along the outer wall of the piston and is attached to the inner wall of the piston cavity;
and a fourth sealing ring is arranged along the inner wall of the opening end of the cylinder body and is attached to the outer wall of the force transmission rod.
In some embodiments of the present invention, the cylinder further comprises an end nut installed at the open end of the cylinder body, the end nut is attached to the outer wall of the force transfer rod, and the third liquid chamber is located between the end nut and the open end of the housing.
In some embodiments of the present invention, the first, second and third chambers are filled with oil.
In some embodiments of the invention, the second end of the force transmission rod comprises an air hole for communicating the air cavity with the outside, and a detachable sealing piece is arranged at the air hole.
In some embodiments of the invention, the closed end of the cylinder body is provided with a hinged joint for mounting the buffering and energy absorbing device to a vehicle body.
The gas-liquid buffering energy-absorbing device provided by the invention has the beneficial effects that:
1. the invention provides a novel gas-liquid buffering energy-absorbing device, which achieves the purpose that a gas-liquid buffering part absorbs impact energy in two directions of stretching and compressing. By additionally arranging the shell and unique oil way and structural design, the effect that one air spring is shared by tensile energy absorption and compressive energy absorption is realized. This results in a more compact design. This novel gas-liquid buffering energy-absorbing device has compact structure, light in weight's advantage under realizing same energy-absorbing function. Compared with the traditional gas-liquid buffer with only a compression energy absorption function, the gas-liquid buffer has more comprehensive functions and stronger working condition adaptability.
2. The gas-liquid buffering energy absorption device is additionally provided with a return stroke damping structure, and the return stroke damping functional characteristic is given to the product in the rebound process after the buffer is pressed. The gas-liquid buffering energy absorption device provided by the invention integrates the characteristics of stretching, compression and return energy absorption, and the energy absorption function of the product is richer and more comprehensive.
3. This novel gas-liquid buffering energy-absorbing device, full play gas-liquid type buffer performance is soft, the capacity is big, characteristics that energy absorption rate is high, through original structural design, has realized that tensile direction and compression direction all are the energy-absorbing of gas-liquid mechanism. Compared with a buffer energy absorption device combined by a plurality of buffer elements, the buffer energy absorption device has the characteristics of large capacity in the stretching direction and strong energy absorption capacity.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic view of an initial state structure of a gas-liquid buffer according to the present invention;
FIG. 2 is a schematic view of a compressed state structure of the gas-liquid buffer according to the present invention;
FIG. 3 is a schematic diagram of the gas-liquid buffer in a stretched state according to the present invention;
FIG. 4 is a schematic diagram of the gas-liquid damper according to the present invention in a stretched state;
FIG. 5 is an enlarged view of a portion of the fluid passageway structure;
FIG. 6 is a schematic view of another exemplary embodiment of a gas-liquid damper according to the present invention;
1-cylinder, 101-hinge ring;
2-a shell;
3-force transfer rod, 301-air hole;
4-a piston;
501-a first liquid cavity, 502-a second liquid cavity, 503-a third liquid cavity, 504-an air cavity;
601-a first fluid channel, 6021-a damping channel, 6022-a first sub-fluid channel, 6023-a gap channel, 6024-a second sub-fluid channel;
7-a one-way valve;
8-a pressure increasing valve;
9-a closure;
10-a throttle lever;
1001-first seal ring, 1002-second seal ring, 1003-third seal ring, 1004-fourth seal ring;
11-end nut;
12-snap ring joint.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "disposed on," "connected to," another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The terms "first" and "second" are used for descriptive purposes only and are not intended to imply relative importance.
The invention provides a gas-liquid buffering energy-absorbing device which can be used for vehicles, particularly railway vehicles and is used for absorbing impact on the vehicles due to tensile force or impact force in the moving process of the vehicles. In the use state, the bicycle is arranged between two bicycle bodies.
Referring to fig. 1, the initial state structure of the gas-liquid buffering energy-absorbing device comprises a cylinder body 1, a shell 2, a force transmission rod 3 and the like.
The cylinder body 1: including a closed end and an open end, forming a cylinder chamber. In the using state, the cylinder body 1 can be fittingly installed to the first vehicle body, and in order to solve the problem of installation between the cylinder body 1 and the vehicle body, the mode shown in fig. 1 can be adopted, the hinged ring 101 is arranged at the closed end of the cylinder body 1, and the mode shown in fig. 6 can also be adopted, and the outer part of the closed end of the cylinder body 1 is designed into the form of a snap ring joint 12.
A housing 2: the integral cylinder body 1 is integrally arranged in the cylinder body and comprises a closed end and an open end, the open end of the shell and the open end of the cylinder body are arranged at intervals in the same direction, and the closed end of the shell is attached to the closed end of the cylinder body in an initial state; the shell 2 and the cylinder body 1 are in non-fixed connection and can move relatively. The whole length of the shell 2 is shorter than that of the cylinder body 1, the shell 2 is arranged in the cylinder body cavity, the open end of the shell is spaced from the open end of the cylinder body, and the space between the open end of the shell and the open end of the cylinder body is a movement space in the process that the shell 2 is stretched.
Force transmission rod 3: the first end is inserted into the shell 2 through the open end of the shell and can move relative to the shell 2, and the second end is positioned outside the open end of the cylinder body; the force transmission rod 3 is of a hollow structure and forms a piston cavity, and a piston 4 is arranged in the piston cavity. In use, the force transfer lever 3 may be connected to the second body or via a transition part such as a coupler. To solve the problem of mounting the force-transmitting rod 3, the second end of the force-transmitting rod 3 can be designed as a screw head in the manner shown in fig. 1, or as a snap ring joint 12 in the manner shown in fig. 6.
A first liquid cavity 501 is formed between the first end of the force transmission rod 3 and the closed end of the shell; the piston 4 divides the piston cavity into two cavities, including an air cavity 504 far away from the shell and a second liquid cavity 502 close to the shell; the outer wall of the force transfer rod is in clearance with the inner wall of the cylinder body and is attached to the opening end of the cylinder body to form a third liquid cavity 503.
A first fluid channel 601 is arranged at the first end of the force transmission rod 3 and is communicated with the first liquid cavity 501 and the second liquid cavity 502; a second fluid channel 602 is arranged between the first end of the force transmission rod 3 and the housing and communicates the first fluid chamber 501 with the third fluid chamber 503. The first, second, and third liquid chambers 501, 502, and 503 are all filled with oil.
The second end of the force transmission rod 3 comprises an air hole 301 for communicating the air cavity with the outside, a detachable sealing piece 9 is arranged at the air hole 301, and the detachable sealing piece 9 can inflate and deflate the air cavity 504.
In a use state, the tensile force or the compressive force is transmitted to the gas-liquid buffer through the force transmission rod 3 or the connecting end of the cylinder body 1 and the vehicle body. Taking the example of the force transmission from the end of the force transmission rod 3 as an example, when a compressive force is applied, the force transmission rod 3 moves towards the inside of the housing 2 to compress the first fluid chamber 501, and part of the hydraulic oil flows into the second fluid chamber 502 and the third fluid chamber 503 through the first fluid chamber 501; meanwhile, when the hydraulic oil in the third hydraulic chamber 503 increases, the piston 4 is driven to move to compress the air chamber 504, buffering the compression force. When the drawing force is applied, a vacuum cavity is formed between the closed end of the shell and the closed end of the cylinder body, and the vacuum cavity has the function of buffering the drawing force. The specific principle is further detailed later.
In order to construct the structure of the fluid channel and realize the linkage between the shell 2 and the force transmission rod 3, in some embodiments of the invention, the first end of the force transmission rod 3 comprises an attaching section 301 attached to the inner wall of the shell 2, the outer wall of the force transmission rod 3 contracts radially along the direction from the attaching section 301 to the opening end close to the shell 2, and forms a gap with the inner wall of the shell 2, specifically, the force transmission rod 3 is of a diameter-variable structure and is of a stepped shaft structure as a whole. The main body part has a uniform rod diameter, but one end inserted into the shell 2 has a larger rod diameter relative to the main body part, and the force transmission rod 3 cannot be separated from the interior of the shell 2 in the stretching process. When the end (first end) with larger rod diameter of the force transmission rod 3 runs to the opening end of the shell 1, the end can be clamped by the opening end of the shell 1, the force transmission rod 3 is linked with the shell 2, and the shell 2 is pulled to further compress the third liquid cavity 503.
The second fluid passage includes:
damping channel 6021: is arranged at the first end of the force transmission rod 3, namely at the section with larger rod diameter and is communicated with the first liquid cavity 501;
first sub-fluid channel 6022: is arranged at the first end of the force transmission rod 3 and is communicated with the first liquid cavity 501;
gap channel 6023: is formed between the outer wall of the force transmission rod 3 and the inner wall of the shell 2 and is communicated with the damping channel 6021 and the sub first fluid channel 6022;
second sub-fluid channel 6024: is arranged at the opening end of the shell 2 and is communicated with the clearance hole 6023.
In some embodiments of the present invention, a check valve 7 is disposed in the first sub-fluid passage 6022, and the check valve 7 is opened when the gas-liquid buffer device is compressed by a pressure in the first liquid chamber 501 being greater than a pressure in the second liquid chamber 502. The first sub fluid passage 6022 opens when the force transmission rod 3 receives a compression force, and allows hydraulic oil to enter the second hydraulic chamber 502 through the first hydraulic chamber 501.
The damping channel 6021 is always communicated when the gas-liquid buffer device is compressed and stretched, that is, in two states, hydraulic oil can flow between the first liquid chamber 501 and the second liquid chamber 502 through the damping channel 6021. In some embodiments of the invention, to achieve a better damping effect, the inner diameter of the damping channel 6021 is smaller, at least smaller, than the inner diameter of the first sub-fluid channel 6022.
In some embodiments of the present invention, a pressurization valve 8 is disposed within the first fluid passageway 601. The pressurizing valve 8 physically and spatially functions to isolate the first and third chambers 501 and 503, and can buffer the output resistance. The booster valve 8 is an optional component and in some embodiments of the invention, the booster valve 8 structure may be omitted.
In some embodiments of the present invention, the bottom of the housing 2 is provided with a throttle lever 10, and the position and size of the throttle lever 10 are configured as follows: the throttle lever 10 can be inserted into the first fluid passage 601 during movement of the force-transmitting rod 3 relative to the housing. The throttle lever 10 can improve the damping effect during the flow of the hydraulic oil.
In order to improve the isolation effect between the cavities, in some embodiments of the present invention, the present invention further includes a sealing structure, where the sealing structure includes one or any combination of the following sealing rings:
a first sealing ring 1001 is arranged along the outer wall of the shell 2, and the first sealing ring 1001 is attached to the inner wall of the cylinder body 1;
a second sealing ring 1002 is arranged along the outer wall of the first end of the force transmission rod 3, and the second sealing ring 1002 is attached to the inner wall of the shell 2;
a third sealing ring 1003 is arranged along the outer wall of the piston, and the third sealing ring 1003 is attached to the inner wall of the piston cavity;
and a fourth sealing ring 1004 arranged along the inner wall of the opening end of the cylinder 1, wherein the fourth sealing ring 1004 is attached to the outer wall of the force transmission rod 3.
As shown in the attached drawings, in the embodiment of the invention, the combination of the four sealing structures is adopted to ensure that the chambers are stably isolated, and the gas-liquid buffering energy-absorbing device can normally work under the tension and compression states.
Furthermore, in some embodiments of the present invention, in order to facilitate the matching installation of the cylinder body 1 and the housing 2, an end nut 11 is further included, which is installed at the open end of the cylinder body 1, the end nut 12 is attached to the outer wall of the force transmission rod 3, and the third liquid chamber 503 is located between the end nut 11 and the open end of the housing 2. A fourth seal 1004 at the open end of the cylinder 1 may be provided on the end nut 12 to engage with the force transmission rod 3.
The working principle of the gas-liquid buffer provided by the invention is as follows.
Compression energy absorption process
When the buffering energy-absorbing device is compressed under the action of external force, the force transmission rod 3 retracts into the shell 2, and oil liquid in the first compression cavity 501 flows into the second compression cavity 502 through an annular gap formed by the throttle rod 10 and a cylindrical hole surface at the thick shaft end of the force transmission rod 3 and then flows into the second compression cavity through the booster valve 8. In the process, the check valve 7 is opened, and a part of the oil in the first liquid chamber 501 flows into the third liquid chamber 503 through the check valve 7. As the compression process advances, the third fluid chamber 503 is increasingly filled with hydraulic fluid to provide a fluid reservoir for the next return energy absorption. The oil liquid entering the second liquid cavity 502 pushes the oil-gas isolation piston 4 to compress the air cavity, and the restoring kinetic energy is stored for the whole buffering energy-absorbing device.
(II) return energy absorption after compression
After the force transmission rod 3 is compressed, the oil-gas isolation piston 4 moves rightwards under the action of the pressure of the air cavity 504, oil in the second liquid cavity 502 is pushed to flow back to the first liquid cavity 501, and then the piston 4 is pushed to move leftwards to recover. In this process, the check valve 7 is closed, and the oil in the third liquid chamber 503 flows back to the first liquid chamber 501 through the damping passage 6021 shown in fig. 1. The damping channels 6021 have the function of preventing the piston 4 from rebounding rapidly, and when the piston recovers to a certain speed, the damping effect brought by the damping channels 6021 can decelerate the recovered piston and absorb the rebounding energy in the return stroke process.
(III) tensile energy absorption
Under the stretching working condition, the force transmission rod 3 moves towards the left direction of the drawing, firstly moves to the position where the end part of the force transmission rod 3 is matched with the opening end of the shell 1, the force transmission rod 3 drives the shell 2 to move leftwards integrally, most of oil in the second liquid cavity 502 flows to the first liquid cavity 501 of the oil through the damping channel 6021, and at the moment, the check valve 7 is closed. The oil liquid backflow and damping mechanism under the stretching working condition is consistent with the return energy absorption working condition, at the moment, the volume of the first liquid cavity 501 is kept unchanged, oil liquid from the second liquid cavity 502 flows into the third liquid cavity 503 through the first liquid cavity 501 and the booster valve 8, the oil gas isolation piston 4 is further pushed to move leftwards, and the volume of the compression air cavity 504 provides energy for the stretching and restoring of the buffering energy absorption device. Under the stretching working condition, the shell 2 is separated from the cylinder body 1, a vacuum cavity 505 is formed between the closed ends of the shell and the cylinder body, the stretching resistance is increased, and the stretching energy absorption is ensured. The vacuum cavity 505 enables the area of the left end surface of the cylinder body 2 to bear oil pressure to form impedance force, so that the system formed by the piston 3 and the cylinder body 2 is prevented from moving towards the left side, namely tensile impedance acting force is output outwards, and the vacuum cavity 505 is a key design of the gas-liquid buffer device with the tensile energy absorption function.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a gas-liquid buffering energy-absorbing device which characterized in that includes:
a cylinder body: comprises a closed end and an open end;
a housing: the whole body is arranged in the cylinder body and comprises a closed end and an open end, the open end of the shell and the open end of the cylinder body are arranged at intervals in the same direction, and the closed end of the shell is attached to the closed end of the cylinder body in an initial state;
force transmission rod: the first end is inserted into the shell through the open end of the shell and can move relative to the shell, and the second end is positioned outside the open end of the cylinder body; the force transmission rod is of a hollow structure and forms a piston cavity, and a piston is arranged in the piston cavity;
a first liquid cavity is formed between the first end of the force transmission rod and the closed end of the shell; the piston divides the piston cavity into two cavities, including an air cavity far away from the shell and a second liquid cavity close to the shell; the outer wall of the force transfer rod is in clearance with the inner wall of the cylinder body and is attached to the opening end of the cylinder body to form a third liquid cavity;
a first fluid channel is arranged at the first end of the force transmission rod and is communicated with the first liquid cavity and the second liquid cavity; a second fluid channel is arranged between the first end of the force transfer rod and the shell and is communicated with the first liquid cavity and the third liquid cavity.
2. The gas-liquid buffering energy-absorbing device as claimed in claim 1, wherein the first end of the force transmission rod comprises a joint section jointed with the inner wall of the shell, and the outer diameter of the joint section is larger than the caliber of the opening end of the shell; the outer wall of the force transfer rod radially shrinks along the direction from the attaching section to the opening end of the shell, and a gap is formed between the force transfer rod and the inner wall of the shell;
the second fluid passage includes:
damping channel: the first end of the force transmission rod is communicated with the first liquid cavity;
first sub-fluid channel: the first end of the force transmission rod is communicated with the first liquid cavity;
a clearance channel: the damping channel is formed between the outer wall of the force transmission rod and the inner wall of the shell and is communicated with the damping channel and the sub first fluid channel;
second sub-fluid channel: is arranged at the opening end of the shell and is communicated with the clearance channel.
3. The gas-liquid buffer energy-absorbing device as claimed in claim 2, wherein a check valve is disposed in the first sub-fluid passage, and the check valve is opened when the first chamber pressure is greater than the second chamber pressure.
4. The gas-liquid buffer energy-absorbing device as claimed in claim 2, wherein the inner diameter of the damping channel is smaller than the inner diameter of the first sub-fluid channel.
5. The gas-liquid buffering energy-absorbing device as claimed in claim 1, wherein a booster valve is arranged in the first fluid passage.
6. The gas-liquid buffering energy-absorbing device as claimed in claim 1 or 5, characterized in that the bottom of the housing is provided with a throttle lever, and the position and the size of the throttle lever are configured to: the throttle lever is insertable into the first fluid passage during movement of the force transfer lever relative to the housing.
7. The gas-liquid buffer energy absorbing device according to claim 1, further comprising a sealing structure, wherein the sealing structure comprises one or any combination of the following sealing rings:
the first sealing ring is arranged along the outer wall of the shell and is attached to the inner wall of the cylinder body;
the second sealing ring is arranged along the outer wall of the first end of the force transmission rod and is attached to the inner wall of the shell;
the third sealing ring is arranged along the outer wall of the piston and is attached to the inner wall of the piston cavity;
and a fourth sealing ring is arranged along the inner wall of the opening end of the cylinder body and is attached to the outer wall of the force transmission rod.
8. The gas-liquid buffering energy-absorbing device as claimed in claim 1 or 7, further comprising an end nut mounted at the open end of the cylinder body, the end nut engaging the outer wall of the force transfer rod, and a third fluid chamber located between the end nut and the open end of the housing.
9. The gas-liquid buffering energy-absorbing device as recited in claim 1, wherein the second end of the force transmission rod comprises an air hole for communicating the air cavity with the outside, and a detachable sealing member is arranged at the air hole.
10. The gas-liquid buffering energy-absorbing device as claimed in claim 1, wherein the closed end of the cylinder body is provided with a hinged joint for mounting the buffering energy-absorbing device to a vehicle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111456034.8A CN114135615B (en) | 2021-12-01 | 2021-12-01 | Gas-liquid buffering energy-absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111456034.8A CN114135615B (en) | 2021-12-01 | 2021-12-01 | Gas-liquid buffering energy-absorbing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114135615A true CN114135615A (en) | 2022-03-04 |
| CN114135615B CN114135615B (en) | 2023-11-21 |
Family
ID=80386846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111456034.8A Active CN114135615B (en) | 2021-12-01 | 2021-12-01 | Gas-liquid buffering energy-absorbing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114135615B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020003072A1 (en) * | 2000-05-30 | 2002-01-10 | Sachs Race Engineering Gmbh | Shock absorber |
| US20030010587A1 (en) * | 2000-01-26 | 2003-01-16 | Valentin Eroshenko | Damper with high dissipating power |
| EP2980441A2 (en) * | 2014-08-01 | 2016-02-03 | Voith Patent GmbH | Device for dampening compressive forces |
| CN108779826A (en) * | 2015-12-29 | 2018-11-09 | 德尔纳阻尼器公司 | Recoil for train attachment device inhibits hydraulic damper |
| CN110884520A (en) * | 2019-12-06 | 2020-03-17 | 中车青岛四方车辆研究所有限公司 | Gas-liquid buffer |
| CN110901682A (en) * | 2019-12-06 | 2020-03-24 | 中车青岛四方车辆研究所有限公司 | Gas-liquid buffer |
| CN211107440U (en) * | 2019-12-06 | 2020-07-28 | 中车青岛四方车辆研究所有限公司 | Gas-liquid buffer |
-
2021
- 2021-12-01 CN CN202111456034.8A patent/CN114135615B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030010587A1 (en) * | 2000-01-26 | 2003-01-16 | Valentin Eroshenko | Damper with high dissipating power |
| US20020003072A1 (en) * | 2000-05-30 | 2002-01-10 | Sachs Race Engineering Gmbh | Shock absorber |
| EP2980441A2 (en) * | 2014-08-01 | 2016-02-03 | Voith Patent GmbH | Device for dampening compressive forces |
| CN108779826A (en) * | 2015-12-29 | 2018-11-09 | 德尔纳阻尼器公司 | Recoil for train attachment device inhibits hydraulic damper |
| CN110884520A (en) * | 2019-12-06 | 2020-03-17 | 中车青岛四方车辆研究所有限公司 | Gas-liquid buffer |
| CN110901682A (en) * | 2019-12-06 | 2020-03-24 | 中车青岛四方车辆研究所有限公司 | Gas-liquid buffer |
| CN211107440U (en) * | 2019-12-06 | 2020-07-28 | 中车青岛四方车辆研究所有限公司 | Gas-liquid buffer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114135615B (en) | 2023-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6311962B1 (en) | Shock absorber with external air cylinder spring | |
| US6135434A (en) | Shock absorber with positive and negative gas spring chambers | |
| KR20060055539A (en) | Shock absorber assembly | |
| JP2003523496A (en) | Low vibration cooling device having pneumatically driven GM type displacer | |
| CN111609073B (en) | Aircraft landing gear buffer | |
| CN110884520A (en) | Gas-liquid buffer | |
| CN201273355Y (en) | Self-protecting variable-damping hydraulic buffer | |
| CN200943662Y (en) | Oil and gas device for damping and preventing torsion | |
| CN110273960A (en) | Pressure buffer equipment | |
| CN110901682A (en) | Gas-liquid buffer | |
| CN113968257B (en) | Vehicle end buffering energy-absorbing device | |
| CN114135615A (en) | Gas-liquid buffering energy-absorbing device | |
| US20060163017A1 (en) | Hollow rod monotube shock absorber | |
| CN111022421B (en) | Double-acting buffering hydraulic cylinder with external load absorption sleeve structure | |
| CN111572587A (en) | Buffering energy-absorbing device | |
| CN114893526B (en) | Vehicle seat suspension damper for coping with impact | |
| CN110953280B (en) | Liquid-gas buffer | |
| CN212267500U (en) | Buffering energy-absorbing device | |
| CN215908302U (en) | Air bag type compression force adjustable shock absorber | |
| CN211107440U (en) | Gas-liquid buffer | |
| CN211107439U (en) | Gas-liquid buffer | |
| CN211574129U (en) | Internal pressure self-adjusting viscous damper | |
| CN219827558U (en) | Pneumatic buffer with good sealing performance | |
| CN113847376B (en) | Damping hydraulic cylinder | |
| CN214092550U (en) | End buffer device of hydraulic actuating cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 266111 South Side of Xinye Road and West Side of Herong Road, Qingdao Hi-tech Industrial Development Zone, Shandong Province Applicant after: CRRC Brake System Co.,Ltd. Address before: 266111 Qingdao High-tech Industrial Development Zone, Qingdao, Shandong Province, on the south side of Xinye Road and on the west side of Herong Road Applicant before: QINGDAO SRI TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |