CN110884520A - Gas-liquid buffer - Google Patents
Gas-liquid buffer Download PDFInfo
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- CN110884520A CN110884520A CN201911242635.1A CN201911242635A CN110884520A CN 110884520 A CN110884520 A CN 110884520A CN 201911242635 A CN201911242635 A CN 201911242635A CN 110884520 A CN110884520 A CN 110884520A
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- 239000007788 liquid Substances 0.000 title claims abstract description 185
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims description 49
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000003139 buffering effect Effects 0.000 abstract description 15
- 238000010521 absorption reaction Methods 0.000 abstract description 9
- 238000007906 compression Methods 0.000 description 10
- 239000010720 hydraulic oil Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
- B61G11/00—Buffers
- B61G11/12—Buffers with fluid springs or shock-absorbers; Combinations thereof
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- 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
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- 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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The present invention provides a gas-liquid buffer, comprising: a barrel comprising a first barrel end and a second barrel end; a cylinder body: part of the sleeve body is inserted into the sleeve body and can move relative to the sleeve body; a first clearance cavity is formed between the outer wall of the cylinder body and the inner wall of the cylinder body, a valve body is arranged on the outer wall of the cylinder body, and the valve body seals the clearance cavity between the valve body and the end of the first cylinder body to form a first liquid cavity; plunger: a cylinder body is inserted into one side of the end of the second cylinder body and can move relative to the cylinder body; an end cover is arranged at one end of the plunger positioned in the cylinder body; a piston is arranged in the plunger; a second liquid cavity is formed between the end cover and the cylinder body, a third liquid cavity is formed between the end cover and the piston, and an air cavity is formed between the piston and the plunger; a force transmission member: the plunger is pushed when the pressure is applied, and the barrel is pulled when the tension is applied; the first liquid cavity is communicated with the third liquid cavity respectively, and the second liquid cavity is communicated with the third liquid cavity. The invention reduces the number of the liquid cavity and the air cavity, simplifies the integral structure of the gas-liquid buffer, and improves the reliability of the buffering energy absorption work.
Description
Technical Field
The invention relates to the technical field of coupler buffering, in particular to a gas-liquid buffer.
Background
At present, a gas-liquid buffer is used as a main buffering energy absorption module for high-speed railways and subways, and the gas-liquid buffer has the excellent characteristics of large capacity, high energy absorption rate, capability of continuously and stably absorbing longitudinal impact kinetic energy of trains 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 traditional gas-liquid buffer can only realize the buffering energy-absorbing function when being impacted and compressed, and the vehicle can appear tensile and two kinds of operating modes of compression at any time in the actual operation process, and the traditional buffer does not have the buffering energy-absorbing function when the train is tensile, can only realize through drawing and pressing the shifter for the structure is complicated, and the cost is increased, and weight increase, and tensile energy-absorbing is less. Therefore, in order to meet the requirements of higher and higher comfort and energy absorption of high-speed trains, cost reduction, vehicle weight reduction and the like, a pull-press bidirectional energy absorption type gas-liquid buffer which is simple in structure and can continuously and efficiently absorb tensile and impact energy under any working condition is needed.
The utility model with publication number CN209064106U discloses a gas-liquid buffer with tension-compression bidirectional buffering energy-absorbing function, which comprises four liquid chambers and two air chambers, and when receiving pressure, the gas-liquid buffer realizes buffering energy-absorbing through the cooperation of the first air chamber and the first liquid chamber and the second liquid chamber; when the vehicle is under tension, the second air cavity is matched with the third liquid cavity and the fourth liquid cavity to achieve buffering and energy absorption. The gas-liquid buffer is complicated in structure due to the arrangement of excessive liquid cavities and air cavities.
Disclosure of Invention
The invention aims to provide a gas-liquid buffer which has simple structure and stable performance and can play a role of buffering when receiving pulling force or pressure.
In order to achieve the purpose, the invention adopts the technical scheme that:
a gas-liquid damper comprising:
barrel: comprises a first cylinder end and a second cylinder end;
a cylinder body: part of the first cylinder end is inserted into the first cylinder end and can move relative to the cylinder; a first clearance cavity is formed between the outer wall of the cylinder body and the inner wall of the cylinder body, a valve body is arranged on the outer wall of the cylinder body, and the valve body seals the clearance cavity between the valve body and the end of the first cylinder body to form a first liquid cavity;
plunger: a cylinder body is inserted into one side of the end of the second cylinder body and can move relative to the cylinder body; an end cover is arranged at one end of the plunger positioned in the cylinder body; a piston is arranged in the plunger cavity; the end cover radially seals the inner diameter of the cylinder body, a second liquid cavity is formed between the end cover and the cylinder body, a third liquid cavity is formed between the end cover and the piston, and an air cavity is formed between the piston and the plunger;
a force transmission member: the plunger is arranged on the outer side of the plunger, can move relative to the plunger and can be linked with the barrel; the force transmission part pushes the plunger piston when being stressed and pulls the cylinder body when being stressed by tensile force;
the first liquid cavity is communicated with the third liquid cavity respectively, and the second liquid cavity is communicated with the third liquid cavity.
Preferably, along the valve body, the cylinder side wall and the plunger side wall, there are provided:
first fluid path: the first liquid cavity is communicated with the third liquid cavity, and a first conduction assembly is arranged on the first liquid cavity;
second fluid path: the first liquid cavity is communicated with the third liquid cavity, and a second conduction assembly is arranged on the first liquid cavity;
the pressure conduction directions of the first conduction assembly and the second conduction assembly are opposite.
Preferably, gaps are formed at the connecting end of the plunger and the end cover, between the plunger and the inner wall of the cylinder body and between the end cover and the inner wall of the cylinder body, so that a second gap cavity is formed, and the second gap cavity is communicated with the first fluid passage and the second fluid passage.
Preferably, the first fluid passage comprises a first channel arranged on the valve body, a second channel penetrating through the side wall of the cylinder body and a third channel penetrating through the side wall of the plunger, the second channel is respectively communicated with the first channel and the second clearance cavity, and the third channel is communicated with the second clearance cavity;
the second fluid passage comprises a fourth passage arranged on the valve body and a fifth passage penetrating through the side wall of the cylinder body, and the fifth passage is respectively communicated with the fourth passage and the second clearance cavity.
Preferably, the first conduction assembly is a pressure increasing valve, an end surface of one side of the pressure increasing valve, which faces the second liquid cavity, is a conical surface, and a part where the first fluid channel is matched with the pressure increasing valve is provided with a conical surface structure matched with the conical surface of the pressure increasing valve.
Preferably, a second fluid channel communicated with the second fluid cavity and the third fluid cavity is arranged on the end cover, the second fluid channel comprises a first branch and a second branch, a third conduction assembly is arranged on the first branch, a fourth conduction assembly is arranged on the second branch, and the third conduction assembly and the fourth conduction assembly are opposite in pressed conduction direction.
Preferably, the first branch and the second branch comprise main passages converging to a direction toward the second liquid chamber;
the third conduction assembly is a pressure increasing valve, the end surface of one side of the pressure increasing valve, which faces the second liquid cavity, is a conical surface, and the part, matched with the pressure increasing valve, of the second fluid channel is of a conical surface structure matched with the conical surface of the pressure increasing valve;
the fourth continuity assembly is a check valve configured to open when the third fluid chamber pressure is greater than the second fluid chamber pressure.
Preferably, the force transmission member is inserted into the gap cavity, the force transmission member extends towards the inner wall of the cylinder to form a first extension part, the cylinder extends towards the force transmission member to form a second extension part, and the first extension part and the second extension part are matched to form an interlocking structure between the force transmission member and the cylinder.
Preferably, the first cylinder end extends towards the cylinder outer wall to form a third extending portion, the cylinder outer wall further extends towards the outer side to form a fourth extending portion, and the third extending portion and the fourth extending portion are matched to form a stop structure between the cylinder and the cylinder.
Preferably, a first tank liquid hole communicated with the outside and the first liquid cavity is formed in the side wall of the cylinder body, and a second tank liquid hole communicated with the outside and the second liquid cavity is formed in the side wall of the cylinder body.
Preferably, the plunger is provided with an air hole, and the air hole is communicated with the outside and the air cavity.
The gas-liquid buffer provided by the invention has the beneficial effects that:
the gas-liquid buffer provided by the invention can play a role in buffering when being subjected to tension or pressure. Compared with the pull-press conversion type gas-liquid buffer in the prior art, the pull-press conversion type gas-liquid buffer reduces the number of liquid cavities and air cavities, simplifies the integral structure of the gas-liquid buffer, and improves the reliability of the work of converting into energy absorption.
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 a gas-liquid buffer;
FIG. 2 is a schematic view of a compressed state structure of the gas-liquid buffer;
FIG. 3 is a schematic structural view of a gas-liquid buffer in a stretched state;
FIG. 4 is an enlarged view of a portion of the gas-liquid damper A;
FIG. 5 is a partially enlarged view of a portion B of the gas-liquid damper;
wherein, in the figures, the respective reference numerals:
1-cylinder, 101-second extension, 102-third extension, 103-first tank liquid hole;
2-cylinder, 201-fourth extension, 202-second tank liquid hole;
3-plunger, 301-air hole;
4-a force transmitting member, 401-a first extension;
5-end cap, 501-second fluid channel;
6-valve body;
7-a second pressure increasing valve;
8-a piston;
9-a second one-way valve;
10-an air cavity;
11-a first fluid chamber;
12-a second fluid chamber;
13-a third fluid chamber;
14-second taper gap;
15-first taper gap;
16-a second interstitial cavity;
17-first channel, 1701-second channel, 1703-third channel;
18-fourth channel, 1802-fifth channel;
19-a first pressure increasing valve;
20-first one-way valve.
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.
It is to be understood that the terms "upper," "lower," "vertical," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
It should be noted that the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not intended to imply relative importance.
The invention provides an air-liquid buffer which can be applied to various types of vehicles and is used for buffering and absorbing collision energy of the vehicles to play a role in protecting the safety of the vehicles.
The structure of the gas-liquid buffer comprises:
barrel 1: comprises a first cylinder end and a second cylinder end; both ends of the cylinder body 1 are of an open structure.
The cylinder body 2: one end of the cylinder body is open, the other end of the cylinder body is closed, the open end of the cylinder body is inserted into the cylinder body 1 at one side of the first cylinder body end and can move relative to the cylinder body 1, and the first cylinder body end is tightly matched with the outer wall of the cylinder body 2 to form a closed structure; a clearance cavity is formed between the outer wall of the cylinder body 2 and the inner wall of the cylinder body, a valve body 6 is arranged on the outer wall of the cylinder body 2, the valve body 6 seals the clearance cavity between the valve body and the first cylinder body end, and a first liquid cavity 11 is formed among the valve body 6, the outer wall of the cylinder body and the first cylinder body end 101. The valve body 6 is fixedly connected with the cylinder body 2. A first tank liquid hole 103 is arranged along the side wall of the cylinder body 2 and is communicated with the outside and the first liquid cavity 11.
Plunger 3: one end of the cylinder body is open, the other end of the cylinder body is closed, the open end of the cylinder body is inserted into the cylinder body 2 at one side of the second cylinder body end, and the cylinder body 2 and the cylinder body can move relatively; an end cover 5 is arranged at one end of the plunger 3 positioned in the cylinder body 2, and the end cover 5 closes the opening end of the plunger 3; a piston 8 is arranged in the plunger cavity, and the piston 8 can freely move in the plunger cavity; the end cover 5 further radially seals the inner cavity of the cylinder body 2, a second liquid cavity 12 is formed between the end cover 5 and the cylinder body 2, a third liquid cavity 13 is formed between the end cover 5 and the piston 3, and an air cavity 10 is formed between the piston 8 and the closed end of the plunger 3. An air hole 301 is formed in the closed end of the plunger 3, and the air hole 301 is communicated with the outside and the air cavity 10 so as to inflate the air cavity 10; a second tank hole 202 is formed along the side wall of the cylinder 2, and the second tank hole 202 communicates with the outside and the second liquid chamber 12 to fill the second liquid chamber 12 with liquid.
Force transmission member 4: the plunger piston is arranged on the outer side of the plunger piston 3, namely one side of the closed end of the plunger piston, can move relative to the plunger piston 4 and can be linked with the barrel 1; the force transmission part 4 is a key part for the operation of the gas-liquid buffer and plays a role in transmitting the tension or pressure on one side of the force transmission part 4, when the force transmission part 4 receives the pressure, the plunger 3 is pushed towards the inner side of the cylinder body 2, and when the force transmission part receives the tension, the cylinder body 1 is pulled towards the outer side of the cylinder body 2.
The first liquid chamber 11 is respectively communicated with the second liquid chamber 12 and the third liquid chamber 13, and the second liquid chamber 12 is communicated with the third liquid chamber 13. Thus, a pull-press linkage buffering energy-absorbing structure is formed.
The communication structure between the first liquid chamber 11 and the third liquid chamber 13 is realized by the following structure.
Be provided with along valve body 6, 2 lateral walls of cylinder body and 3 lateral walls of plunger:
first fluid path: the first liquid chamber 11 and the third liquid chamber 13 are communicated, and a first conduction assembly is arranged on the first liquid chamber. Second fluid path: the first liquid cavity is communicated with the third liquid cavity, and a second conduction assembly is arranged on the first liquid cavity; the pressure conduction directions of the first conduction assembly and the second conduction assembly are opposite. When the pressure of the first liquid cavity 11 is larger than the pressure of the third liquid cavity 13, a conducting component is conducted, so that hydraulic oil enters the third liquid cavity 13 through the first liquid cavity 11; when the pressure of the third liquid chamber 13 is greater than the pressure of the first liquid chamber 11, the other conducting component is conducted, so that the hydraulic oil enters the first liquid chamber 11 through the third liquid chamber 13.
Because the first fluid passage needs to penetrate through the cylinder body 1, the cylinder body 2 and the plunger 3, a reasonable fluid flow channel needs to be designed among the joint walls of the cylinder body 1, the cylinder body 2 and the plunger 3 so as to ensure that fluid can smoothly circulate among the three chambers.
Gaps are reserved at the connecting ends of the plunger 3 and the end cover 5, between the plunger 3 and the inner wall of the cylinder body 2 and between the end cover 5 and the inner wall of the cylinder body 2, and a second gap cavity 16 is formed. The second interstitial cavity 16 serves as part of the first fluid pathway.
The specific implementation structure of the first fluid passage is as follows: the first fluid passage includes a first passage 1701 provided on the valve body 2, a second passage 1702 penetrating the side wall of the cylinder body 2, and a third passage 1703 penetrating the side wall of the plunger 3, the second passage 1702 communicating with the first passage 1701 and the second clearance chamber 16, respectively, and the third passage 1703 communicating with the second clearance chamber 16.
The second fluid passage includes a fourth passage 1801 provided on the valve body and a fifth passage 1802 penetrating the side wall of the cylinder block 2, the fifth passage 1802 communicating with the fourth passage 1801 and the second gap chamber 16, respectively.
In this embodiment, the first conducting assembly is a pressure increasing valve, the first pressure increasing valve 19 is arranged in the first passage 1701, the end surface of the first pressure increasing valve 19 facing the second liquid chamber 12 is a conical surface, and the matching part of the first passage 1701 and the pressure increasing valve 19 is arranged as a first conical surface clearance 15 matching structure matching with the conical surface of the pressure increasing valve; this configuration may ensure a tighter fit of the fluid channels. The second conducting component is a one-way valve, and the first one-way valve 20 is disposed on the fourth passage 1801. Wherein the first pressure-increasing valve 19 and the first check valve 20 are configured such that the first pressure-increasing valve 19 opens when the pressure of the first liquid chamber 11 is greater than the pressure of the third liquid chamber 13; when the pressure of the third liquid chamber 13 is greater than the pressure of the first liquid chamber 11, the first check valve 20 opens.
The communicating structure of the second liquid chamber 12 and the third liquid chamber 13 is realized by the following structure.
The end cover 5 is provided with a second fluid channel 501 communicated with the second liquid cavity 12 and the third liquid cavity 13, the second fluid channel 501 comprises a first branch and a second branch, the first branch is provided with a third conduction assembly, the second branch is provided with a fourth conduction assembly, and the third conduction assembly and the fourth conduction assembly are opposite in pressed conduction direction. The pressure conduction direction mentioned here means the opening and closing of the conduction module when there is a difference in pressure between both sides of the conduction module.
In this embodiment, the following is specifically mentioned: the first branch and the second branch comprise main passages converging to form a Y-shaped flow passage structure towards the second liquid cavity 12; the third switches on the subassembly and adopts the booster valve, and the fourth switches on the subassembly and adopts the check valve.
The first branch is provided with a second pressure increasing valve 7, one end face of the pressure increasing valve 7, which faces the second liquid cavity 12, is a conical surface, and the matching position of the second fluid channel and the second pressure increasing valve 7 is provided with a second conical surface clearance 14 matching structure matched with the conical surface of the pressure increasing valve. This configuration may ensure a tighter fit of the fluid channels. The second pressure increasing valve 7 is arranged to be switched on when the pressure in the second liquid chamber 12 is to meet the pressure in the third liquid chamber 13.
The pressure increasing valve can enlarge the damping in the fluid flowing process, and the pressure increasing ratio of the pressure increasing valve can be designed according to the buffering requirement during application.
A second check valve 9 is arranged on the second branch and is arranged to open when the pressure in the third chamber 13 is greater than the pressure in the second chamber 12.
The force transmission component 4 is inserted into a clearance cavity between the cylinder body 2 and the cylinder body 1, the force transmission component 4 extends towards the inner wall direction of the cylinder body 1 to form a first extension part 401, the cylinder body 1 extends towards the force transmission component 4 to form a second extension part 101, and the first extension part 401 and the second extension part 101 are matched to form an interlocking structure between the force transmission component 4 and the cylinder body 1.
The first cylinder end 101 extends towards the outer wall of the cylinder 2 to form a third extending part 102, the outer wall of the cylinder 2 further extends outwards to form a fourth extending part 204, and the third extending part 102 and the fourth extending part 204 are matched to form a stop structure between the cylinder 1 and the cylinder 2.
The principle mechanism of this solution will be explained below.
In the initial state, oil is filled into the liquid cavity pipe, and gas is filled into the gas cavity pipe. The air cavity 10 space and the initial filling pressure are set as required. During filling, hydraulic oil is firstly filled into the first liquid cavity 11 from the first filling hole 103, and the second liquid cavity 12 from the second filling hole 202; when the pressure of the second liquid cavity 12 is greater than the pressure of the third liquid cavity 13, the second conical surface gap 14 between the second booster valve 7 and the second fluid channel is opened, hydraulic oil smoothly flows into the third liquid cavity 13 through the first liquid cavity 11, and the pressures of the three liquid cavities are equal when oil filling is finished. Then, the air is filled from the air hole 301, and when the air pressure is increased to a certain degree, the second taper surface gap 14 between the second pressure-increasing valve 7 and the second fluid passage is closed, and the first liquid chamber 11, the second liquid chamber 12 and the third liquid chamber 13 are separated.
a compression process
The working principle refers to fig. 2. When the buffer is compressed by external force, namely the force transmission part 4 is compressed or the cylinder body 2 is compressed, the plunger 3 enters the cylinder body 2, and the cylinder body 2, the cylinder 1 and the valve body 6 synchronously move during compression, so that the volume of the first liquid cavity 11 is unchanged, and the first liquid cavity 11 does not participate in the pressure buffering work. At this time, the plunger 3 pushes the end cover 5 to move, the second liquid chamber 12 is compressed, the pressure in the second liquid chamber 12 is increased, and the hydraulic oil in the second liquid chamber 12 flows into the 3 rd liquid chamber through the pressure increasing valve 7. Before the compression process is started, the pressure of the third liquid cavity 13 comes from the filling pressure, and in the compression process, namely, the pressure of the second liquid cavity 12 is successfully enabled to be higher than that of the third liquid cavity 13 through the pressurization function of the pressurization valve 7, so that the conical surface gap 14 is forced to be opened, the amount of the third liquid cavity oil 13 is increased, the pressure is increased, the piston 8 is pushed to move towards the air cavity 10, and the air in the air cavity 10 is compressed.
b compression recovery procedure
When the buffer capable of generating pressure is pressed to the stroke and the stroke is finished, the compression energy stored in the air cavity 10 needs to be released, the left and right stress area difference between the end cover 5 and the plunger 3 in the environment of being subjected to the hydraulic oil pressure of the second liquid cavity 12 enables the plunger 3 to be forced to move back in the axial direction, the one-way valve 9 is opened at the moment, the second liquid cavity 12 is not in damping communication with the third liquid cavity 13, and the plunger 3 is smoothly pushed back to the original position.
c stretching process
The working principle refers to fig. 3. When the buffer is stretched by external force, the stretching force is exerted on the force transmission part 4 or the cylinder body 2, and the force transmission part 4 is linked with the cylinder body 1; the cylinder 2 moves synchronously with the plunger 3 and the valve body 6, so the volume of the second liquid chamber 12 is unchanged, and at the moment, the cylinder 2 is separated from the cylinder 1, the volume of the first liquid chamber 11 is reduced, the pressure is increased, the first conical clearance 15 on the first channel 1701 is opened, and the hydraulic oil in the first liquid chamber 11 flows into the third liquid chamber 13 through the first channel 1701, the second channel 1702, the second clearance chamber 16 and the third channel 1703. Before the stretching process is started, the pressure of the third liquid cavity 13 comes from the filling pressure, namely, the pressure of the second liquid cavity 12 is successfully enabled to be higher than that of the third liquid cavity 13 through the pressurizing function of the first pressurizing valve 19, the conical surface gap 15 is forced to be opened, the oil quantity of the third liquid cavity 13 is increased, and the piston 8 is pushed to move towards the air cavity 10 to compress air.
d process of stretch recovery
As mentioned above, after the buffer is pulled to reach the stroke, the compression energy stored in the air cavity 10 needs to be released, the valve body 6 is forced to move back along the axial direction by the difference of left and right force bearing areas in the hydraulic oil pressure environment of the second liquid cavity 12, the first check valve 20 is opened, the first liquid cavity 11 and the third liquid cavity 13 are not in damping communication, the hydraulic oil flows back to the first liquid cavity 11 from the original path of the third liquid cavity 13, specifically, the hydraulic oil flows into the second clearance cavity 16 through the third liquid cavity 13 and the third channel 1703, and flows into the fourth channel 1801 through the fifth channel 1802, and finally flows back to the first liquid cavity 11, and the cylinder body 2 is pushed back to the original position smoothly.
The gas-liquid buffer provided by the invention can play a role in buffering and energy absorption when being subjected to tension and pressure. Compared with the gas-liquid buffer in the prior art, the number of the liquid cavity and the gas cavity is reduced, the integral structure of the gas-liquid buffer is simplified, and the reliability of the energy absorption work can be improved.
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. A gas-liquid damper, comprising:
barrel: comprises a first cylinder end and a second cylinder end;
a cylinder body: part of the first cylinder end is inserted into the first cylinder end and can move relative to the cylinder; a first clearance cavity is formed between the outer wall of the cylinder body and the inner wall of the cylinder body, a valve body is arranged on the outer wall of the cylinder body, and the valve body seals the clearance cavity between the valve body and the end of the first cylinder body to form a first liquid cavity;
plunger: a cylinder body is inserted into one side of the end of the second cylinder body and can move relative to the cylinder body; an end cover is arranged at one end of the plunger positioned in the cylinder body; a piston is arranged in the plunger cavity; the end cover radially seals the inner diameter of the cylinder body, a second liquid cavity is formed between the end cover and the cylinder body, a third liquid cavity is formed between the end cover and the piston, and an air cavity is formed between the piston and the plunger;
a force transmission member: the plunger is arranged on the outer side of the plunger, can move relative to the plunger and can be linked with the barrel; the force transmission part pushes the plunger piston when being stressed and pulls the cylinder body when being stressed by tensile force;
the first liquid cavity is communicated with the third liquid cavity respectively, and the second liquid cavity is communicated with the third liquid cavity.
2. The gas-liquid damper according to claim 1, wherein:
first fluid path: the first liquid cavity is communicated with the third liquid cavity, and a first conduction assembly is arranged on the first liquid cavity;
second fluid path: the first liquid cavity is communicated with the third liquid cavity, and a second conduction assembly is arranged on the first liquid cavity;
the pressure conduction directions of the first conduction assembly and the second conduction assembly are opposite.
3. The gas-liquid damper according to claim 2, wherein gaps are present between the connection end of the plunger and the end cap, between the plunger and the inner wall of the cylinder, and between the end cap and the inner wall of the cylinder, to form a second gap chamber, and the second gap chamber communicates the first fluid passage and the second fluid passage.
4. The gas-liquid damper as claimed in claim 3, wherein:
the first fluid passage comprises a first channel arranged on the valve body, a second channel penetrating through the side wall of the cylinder body and a third channel penetrating through the side wall of the plunger, the second channel is respectively communicated with the first channel and the second clearance cavity, and the third channel is communicated with the second clearance cavity;
the second fluid passage comprises a fourth passage arranged on the valve body and a fifth passage penetrating through the side wall of the cylinder body, and the fifth passage is respectively communicated with the fourth passage and the second clearance cavity.
5. The gas-liquid damper as claimed in claim 2, wherein: the first conduction assembly is a pressure increasing valve, one side end face of the pressure increasing valve, facing the second liquid cavity, is a conical surface, and the matching position of the first fluid channel and the pressure increasing valve is of a conical surface structure matched with the conical surface of the pressure increasing valve.
6. The gas-liquid damper according to claim 1, characterized in that: the end cover is provided with a second fluid channel communicated with a second fluid cavity and a third fluid cavity, the second fluid channel comprises a first branch and a second branch, a third conduction assembly is arranged on the first branch, a fourth conduction assembly is arranged on the second branch, and the third conduction assembly and the fourth conduction assembly are pressed to be conducted in opposite directions.
7. The gas-liquid damper as claimed in claim 6, wherein: the first branch and the second branch comprise main passages converging to form a main passage facing the second liquid cavity;
the third conduction assembly is a pressure increasing valve, the end surface of one side of the pressure increasing valve, which faces the second liquid cavity, is a conical surface, and the part, matched with the pressure increasing valve, of the second fluid channel is of a conical surface structure matched with the conical surface of the pressure increasing valve;
the fourth continuity assembly is a check valve configured to open when the third fluid chamber pressure is greater than the second fluid chamber pressure.
8. The gas-liquid damper according to claim 1, wherein the force transmission member is inserted into the gap chamber, the force transmission member extends in a direction of an inner wall of the cylinder to form a first extending portion, the cylinder extends in a direction of the force transmission member to form a second extending portion, and the first extending portion and the second extending portion cooperate to form an interlocking structure between the force transmission member and the cylinder.
9. The gas-liquid damper as claimed in claim 6, wherein: the first cylinder end extends towards the direction of the outer wall of the cylinder body to form a third extending part, the outer wall of the cylinder body further extends towards the outer side to form a fourth extending part, and the third extending part and the fourth extending part are matched to form a stop structure between the cylinder and the cylinder body.
10. The gas-liquid damper according to claim 1, characterized in that: a first tank liquid hole communicated with the outside and the first liquid cavity is formed in the side wall of the cylinder body, and a second tank liquid hole communicated with the outside and the second liquid cavity is formed in the side wall of the cylinder body.
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| CN201911242635.1A CN110884520B (en) | 2019-12-06 | 2019-12-06 | Gas-liquid buffer |
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| CN201911242635.1A CN110884520B (en) | 2019-12-06 | 2019-12-06 | Gas-liquid buffer |
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| CN110884520A true CN110884520A (en) | 2020-03-17 |
| CN110884520B CN110884520B (en) | 2024-05-31 |
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| CN112503560A (en) * | 2020-12-11 | 2021-03-16 | 四川德胜集团钒钛有限公司 | Oxygen-enriched sintering device |
| CN113968257A (en) * | 2021-12-01 | 2022-01-25 | 青岛思锐科技有限公司 | Vehicle end buffering energy-absorbing device |
| CN114135615A (en) * | 2021-12-01 | 2022-03-04 | 青岛思锐科技有限公司 | Gas-liquid buffering energy-absorbing device |
| EP4098904A1 (en) * | 2021-06-02 | 2022-12-07 | Bombardier Transportation GmbH | Damping arrangement for a rail vehicle |
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| CN110884520B (en) | 2024-05-31 |
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