CN108591338B - Gas and liquid mixed buffer - Google Patents
Gas and liquid mixed buffer Download PDFInfo
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- CN108591338B CN108591338B CN201810677087.4A CN201810677087A CN108591338B CN 108591338 B CN108591338 B CN 108591338B CN 201810677087 A CN201810677087 A CN 201810677087A CN 108591338 B CN108591338 B CN 108591338B
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- sealing cavity
- piston
- lower sealing
- hole
- upper sealing
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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
- F16F9/061—Mono-tubular units
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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
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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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
- F16F9/3405—Throttling passages in or on piston body, e.g. slots
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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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
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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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
- F16F2222/126—Fluid damping using gases
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention provides a gas/liquid hybrid buffer, which comprises a cylinder body, a piston rod and a piston, wherein the cylinder body is divided into an upper sealing cavity and a lower sealing cavity by the piston; the upper sealing cavity is provided with a first air inlet, the lower sealing cavity is provided with a second air inlet, the bottom of the lower sealing cavity is provided with a liquid medium, and a liquid pipeline communicated with the upper sealing cavity and the lower sealing cavity is arranged in the cylinder body; the position of the second air inlet is higher than the liquid medium liquid level; the first air inlet is communicated with the second air inlet; the piston is provided with a reset one-way valve, the air pressure in the lower sealing cavity is greater than the air pressure in the upper sealing cavity, and the lower sealing cavity and the upper sealing cavity are blocked by the reset one-way valve; when the air pressure in the lower sealing cavity is less than or equal to the air pressure in the upper sealing cavity, the lower sealing cavity and the upper sealing cavity are communicated through the reset one-way valve. The invention can play a role in speed reduction, so that the speed reduction device has an additional acceleration function in the speed reduction process, and achieves a buffering function.
Description
Technical Field
The invention relates to the field of buffers or the field of environmental protection, in particular to a gas-liquid hybrid buffer.
Background
The shock and the impact when the buffer mainly used restraines the bounce-back, it mainly plays the cushioning effect, and other structures in less impact in order to protect equipment, a large amount of buffers among the prior art are mostly spring buffer and gasbag formula buffer, and it has mainly adopted the principle that spring and air can absorb the impact at the in-process of compression to play the effect of buffering, spring buffer and gasbag formula buffer's main use: fan, wind cabinet. An air conditioning box. The vibration damping and isolating device comprises an air compressor, an air conditioning unit, a generator, a cooling water tower and the like.
In the modern environmental protection field, in order to deal with sudden accidents, a gate device which is closed quickly is arranged in a channel with potential danger, a quick response is needed, the gate is closed in a free-falling mode, the gate is usually manufactured by casting, the mechanical characteristic of the gate does not allow huge impact at the closing moment, so that a door frame is damaged, and the impact is reduced or eliminated when the gate is closed, so that the speed is reduced; when the gate is closed, a certain closing force is needed to seal the gate, so that a certain speed needs to be maintained, and the gate can be closed tightly.
The prior art and devices do not provide the deceleration effect such as linear motion during a fall. If a special damper design can be added, the vibration damping and isolating effect can be achieved, the speed reducing effect can be achieved, and an additional acceleration is achieved in the speed reducing process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a gas-liquid mixed type buffer, which is essentially a gas-liquid mixed type buffering deceleration vibration isolation device, and solves the buffering and deceleration of high-altitude falling or uncontrolled falling so as to protect the life and property safety of personnel. The air bag type buffer does not need to store energy and is not added with any elastic device, so that elastic fatigue is not generated except for use loss.
The present invention achieves the above-described object by the following technical means.
A gas and liquid hybrid buffer comprises a cylinder body, a piston rod and a piston, wherein the cylinder body is divided into an upper sealing cavity and a lower sealing cavity by the piston, and the piston is connected with the piston rod; the upper sealing cavity is provided with a first air inlet, the lower sealing cavity is provided with a second air inlet, the bottom of the lower sealing cavity is provided with a liquid medium, and a liquid pipeline communicated with the upper sealing cavity and the lower sealing cavity is arranged in the cylinder body; the position of the second air inlet is higher than the liquid medium liquid level; the first air inlet is communicated with the second air inlet;
the piston is provided with a reset one-way valve, the air pressure in the lower sealing cavity is greater than the air pressure in the upper sealing cavity, and the lower sealing cavity and the upper sealing cavity are blocked by the reset one-way valve; when the air pressure in the lower sealing cavity is less than or equal to the air pressure in the upper sealing cavity, the lower sealing cavity and the upper sealing cavity are communicated through the reset one-way valve.
Furthermore, the reset one-way valve comprises a valve clack and a valve clack limiting seat; a stepped hole is formed in the piston and comprises a first hole and a second hole, a valve clack limiting seat is installed in the second hole, the valve clack is placed between the valve clack limiting seat and the second hole, and the diameter of the valve clack is larger than that of the first hole; the valve clack limiting seat is internally provided with a cavity communicated with the lower sealing cavity, and the air pressure in the lower sealing cavity is greater than the air pressure in the upper sealing cavity, so that the first hole and the second hole are blocked by the valve clack.
Further, the valve clack is made of rubber or tetrafluoroethylene; the valve clack structure is an elastic diaphragm or an elastic film.
Further, the valve clack limiting seat comprises an annular base and a cross support, one end of the cross support is fixed at the center of the annular base, the annular base is installed on a piston face in contact with the lower sealing cavity, the cross support is installed in the second hole, and the valve clack is placed at the other end of the cross support.
Further, an oil collecting groove is formed in the piston, and the oil collecting groove is communicated with the first hole through a groove and used for enabling the liquid medium to flow back to the lower sealing cavity from the upper sealing cavity.
Further, the groove is an inclined groove for accelerating the flow of the liquid medium into the reset check valve.
Furthermore, the opening of the groove communicated with the oil collecting groove is higher than the bottom of the oil collecting groove, so that a liquid medium is reserved at the bottom of the oil collecting groove and is used for lubricating.
Further, the first air inlet and the second air inlet are communicated outside the cylinder body, and a throttle valve is arranged between the first air inlet and the second air inlet.
The invention has the beneficial effects that:
1. the gas and liquid mixed-action buffer has the advantages that the gas and liquid mixed-action buffer plays a role in speed reduction in a gas and liquid mixed-action mode, has an additional acceleration effect in the speed reduction process, is simple in structure, has no spring structure, achieves a buffering effect, does not have elastic force residue in any static state, does not generate elastic fatigue, and does not have compression potential energy.
2. The gas and liquid mixed buffer can adjust the opening size of the throttling valve according to the load condition and determine the kinetic energy absorbed by the buffer.
3. According to the gas and liquid mixing type buffer, the opening communicated with the oil collecting groove through the groove is higher than the bottom of the oil collecting groove, so that a liquid medium is reserved at the bottom of the oil collecting groove and is used for lubricating.
4. According to the gas and liquid mixed buffer, the oil collecting groove is communicated with the first hole through the groove and is used for enabling liquid media to flow back to the lower sealing cavity from the upper sealing cavity.
Drawings
FIG. 1 is a schematic view of a gas-liquid hybrid buffer according to the present invention.
FIG. 2 is a schematic diagram of the buffering status of the air and liquid hybrid buffer according to the present invention.
FIG. 3 is a schematic diagram of the reset state of the air and liquid hybrid buffer according to the present invention.
Fig. 4 is a structural diagram of the reset check valve of the invention.
In the figure:
1-a cylinder body; 2-a piston; 3-a piston rod; 4-upper sealed cavity; 5-lower sealed cavity; 6-an oil collecting tank; 7-a throttle valve; 8-a liquid medium; 9-a groove; 10-a reset one-way valve; 11-a valve flap; 12-valve clack limiting seat; 13-a first aperture; 14-second hole.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Referring to fig. 1, the gas and liquid hybrid buffer of the present invention includes a cylinder 1, a piston rod 3 and a piston 2, wherein the cylinder 1 is divided into an upper seal cavity 4 and a lower seal cavity 5 by the piston 2, and the piston 2 is connected to the piston rod 3; the upper sealing cavity 4 is provided with a first air inlet, the lower sealing cavity 5 is provided with a second air inlet, the bottom of the lower sealing cavity 5 is provided with a liquid medium 8, and a liquid pipeline communicated with the upper sealing cavity 4 and the lower sealing cavity 5 is arranged inside the cylinder body 1; the second air inlet is positioned above the liquid level of the liquid medium 8; the first air inlet and the second air inlet are communicated outside the cylinder body 1, and a throttle valve 7 is arranged between the first air inlet and the second air inlet.
The piston 2 is provided with a reset one-way valve 10, and when the air pressure in the lower sealing cavity 5 is larger than the air pressure in the upper sealing cavity 4, the lower sealing cavity 5 and the upper sealing cavity 4 are blocked by the reset one-way valve 10; and the air pressure in the lower sealed cavity 5 is less than or equal to the air pressure in the upper sealed cavity 4, and the lower sealed cavity 5 and the upper sealed cavity 4 are communicated through the reset one-way valve 10. The reset check valve 10 is functionally different from a conventional check valve in principle.
As shown in fig. 4, the reset check valve 10 includes a valve flap 11 and a valve flap limiting seat 12; a stepped hole is formed in the piston 2, the stepped hole comprises a first hole 13 and a second hole 14, and the first hole 13 is positioned on the surface of the piston 2, which is in contact with the upper sealing cavity 4; the second hole 14 is positioned on the contact surface of the piston 2 and the lower sealing cavity 5, and the diameter of the second hole 14 is larger than that of the first hole 13; a valve clack limiting seat 12 is installed in the second hole 14, the valve clack 11 is placed between the valve clack limiting seat 12 and the second hole 14, and the diameter of the valve clack 11 is larger than that of the first hole 13; the valve clack limiting seat 12 is internally provided with a cavity communicated with the lower sealing cavity 5, when the air pressure in the lower sealing cavity 5 is greater than the air pressure in the upper sealing cavity 4, the valve clack 11 is pressed on a step surface between the first hole 13 and the second hole 14 by the air pressure in the lower sealing cavity 5, and therefore the first hole 13 and the second hole 14 can be blocked. The valve flap 11 is made of rubber or tetrafluoroethylene or a membrane material. The valve clack structure is an elastic diaphragm or an elastic film. The valve clack limiting seat 12 comprises an annular base and a cross support, wherein one end of the cross support is fixed in the center of the annular base, so that the interior of the valve clack limiting seat 12 can be communicated with the lower sealing cavity 5; the annular base is arranged on the surface of the piston 2 which is contacted with the lower sealing cavity 5, the cross support is arranged in the second hole 14, and the valve clack 11 is arranged at the other end of the cross support.
In order to achieve an automatic return of the liquid medium 8 into the lower sealing chamber 5 in the inactive state, the piston 2 is provided with an oil sump 6, the oil sump 6 communicating with the first bore 13 via the groove 9. And when the air pressure in the lower sealed cavity 5 is less than or equal to the air pressure in the upper sealed cavity 4, the liquid medium 8 flows back to the lower sealed cavity 5 through the second hole 14 and the cavity in the valve clack limiting seat 12. The grooves 9 are slanted grooves. The opening of the groove 9 communicated with the oil collecting groove 6 is higher than the bottom of the oil collecting groove 6, and the residual liquid medium 8 at the bottom of the oil collecting groove 6 is used for lubricating the piston 2 in the moving process. In fig. 4 the oil sump 6 is only a large chamfer, but the oil sump 6 may also take other forms, such as a depression in the surface of the piston 2, etc.
As shown in fig. 2 and fig. 3, the buffering operation process is as follows:
initial state: the piston 2 is positioned at the top of the cylinder body 1, and the piston 2 and the cylinder body 1 are relatively static and are in a state of integral static or downward motion;
the first buffer state: when the cylinder body 2 stops moving under the action of resistance force, the piston 2 continues moving downwards, the air pressure in the lower sealing cavity 5 is larger than the air pressure in the upper sealing cavity 4, and the reset one-way valve 10 blocks the lower sealing cavity 5 and the upper sealing cavity 4; at this moment, the gas compresses the liquid medium 8, and the liquid medium 8 enters the upper sealed cavity 4 through a liquid pipeline;
the second buffer state: the air in the lower sealed cavity 5 gradually enters the upper sealed cavity 4 through the throttle valve 7 as the air pressure is increased, the unit flow of the air can be controlled through the throttle valve 7, and the process is generally controlled within about 3-5 seconds;
and (4) ending buffering: the piston 2 stops moving, does not need to reach the limit position to prevent impact, usually considers the stroke position allowance of about 50mm, at the moment, the liquid medium 8 is on the piston, because the air pressure in the lower sealing cavity 5 is the same as the air pressure in the upper sealing cavity 4 at the moment, the liquid medium 8 automatically flows back to the lower sealing cavity 5 through the reset one-way valve 10, a small part of the liquid medium 8 is collected in the oil collecting tank 6, and plays a role of lubrication when resetting;
the reset working process comprises the following steps:
initial state: the piston 2 is positioned at the bottom of the cylinder 1.
Resetting the state: the piston 2 moves upwards, the cylinder body 1 slides downwards relative to the piston 2 under the action of gravity, the air pressure in the lower sealing cavity 5 is less than or equal to the air pressure in the upper sealing cavity 4, and the air in the upper sealing cavity 4 is compressed and quickly downwards moves from the reset one-way valve 10.
And after the resetting is finished, the piston 2 reaches the top of the cylinder body 1.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (8)
1. A gas and liquid hybrid buffer comprises a cylinder body (1), a piston rod (3) and a piston (2), wherein the cylinder body (1) is internally divided into an upper sealing cavity (4) and a lower sealing cavity (5) through the piston (2), and the piston (2) is connected with the piston rod (3); the upper sealing cavity (4) is provided with a first air inlet, and the lower sealing cavity (5) is provided with a second air inlet, and the upper sealing cavity is characterized in that a liquid medium (8) is arranged at the bottom of the lower sealing cavity (5), and a liquid pipeline for communicating the upper sealing cavity (4) with the lower sealing cavity (5) is arranged in the cylinder body (1); the second air inlet is positioned higher than the liquid level of the liquid medium (8); the first air inlet is communicated with the second air inlet;
a reset one-way valve (10) is arranged on the piston (2), and when the air pressure in the lower sealing cavity (5) is larger than the air pressure in the upper sealing cavity (4), the lower sealing cavity (5) and the upper sealing cavity (4) are blocked by the reset one-way valve (10); when the air pressure in the lower sealing cavity (5) is less than or equal to the air pressure in the upper sealing cavity (4), the lower sealing cavity (5) and the upper sealing cavity (4) are communicated through the reset one-way valve (10).
2. Gas and liquid hybrid shock absorber according to claim 1, characterized in that said reset check valve (10) comprises a flap (11) and a flap limit seat (12); a stepped hole is formed in the piston (2), the stepped hole comprises a first hole (13) and a second hole (14), a valve clack limiting seat (12) is installed in the second hole (14), the valve clack (11) is placed between the valve clack limiting seat (12) and the second hole (14), and the diameter of the valve clack (11) is larger than that of the first hole (13); the valve clack limiting seat (12) is internally provided with a cavity communicated with the lower sealing cavity (5), and when the air pressure in the lower sealing cavity (5) is greater than the air pressure in the upper sealing cavity (4), the valve clack (11) blocks the first hole (13) and the second hole (14).
3. Gas and liquid hybrid shock absorber according to claim 2, characterized in that the valve flap (11) material is rubber or tetrafluoroethylene; the valve flap (11) is of an elastic membrane or an elastic film.
4. Gas and liquid hybrid shock absorber according to claim 2, characterized in that the flap restraint (12) comprises an annular base, one end of which is fixed in the center of the annular base, and a cross-shaped support, which is mounted on the face of the piston (2) in contact with the lower sealed chamber (5) and which is mounted in the second hole (14), the other end of which houses the flap (11).
5. Gas and liquid hybrid shock absorber according to claim 2, characterized in that the piston (2) is provided with an oil sump (6), which oil sump (6) communicates with the first bore (13) via a groove (9).
6. Gas and liquid hybrid shock absorber according to claim 5, characterized in that said grooves (9) are inclined grooves.
7. Gas and liquid hybrid shock absorber according to claim 5, characterized in that the opening of the groove (9) communicating with the oil sump (6) is higher than the bottom of the oil sump (6).
8. Gas and liquid hybrid shock absorber according to claim 1, wherein the first and second inlet ports communicate outside the cylinder (1), with a throttle valve (7) provided therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810677087.4A CN108591338B (en) | 2018-06-27 | 2018-06-27 | Gas and liquid mixed buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810677087.4A CN108591338B (en) | 2018-06-27 | 2018-06-27 | Gas and liquid mixed buffer |
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| Publication Number | Publication Date |
|---|---|
| CN108591338A CN108591338A (en) | 2018-09-28 |
| CN108591338B true CN108591338B (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810677087.4A Active CN108591338B (en) | 2018-06-27 | 2018-06-27 | Gas and liquid mixed buffer |
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| CN (1) | CN108591338B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273875B (en) * | 2019-05-30 | 2021-06-01 | 武汉船用机械有限责任公司 | One-way valve piston capable of automatically supplementing fluid |
| CN111300994B (en) * | 2019-12-18 | 2021-03-02 | 重庆市星极齿轮有限责任公司 | Marking machine with slagging-off function |
| CN113606277A (en) * | 2021-05-25 | 2021-11-05 | 上海应用技术大学 | Vehicle electrorheological fluid shock absorber based on hydraulic adjusting system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363494A (en) * | 2008-09-19 | 2009-02-11 | 南京航空航天大学 | Liquid-solid mixing medium vibration isolator |
| CN106151350A (en) * | 2016-08-15 | 2016-11-23 | 深圳前海零距物联网科技有限公司 | Vibration-damping bicycle TRT |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004132429A (en) * | 2002-10-09 | 2004-04-30 | Kayaba Ind Co Ltd | Pneumatic shock absorber |
| DE102013003841B4 (en) * | 2012-12-21 | 2016-11-24 | Fludicon Gmbh | vibration |
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2018
- 2018-06-27 CN CN201810677087.4A patent/CN108591338B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363494A (en) * | 2008-09-19 | 2009-02-11 | 南京航空航天大学 | Liquid-solid mixing medium vibration isolator |
| CN106151350A (en) * | 2016-08-15 | 2016-11-23 | 深圳前海零距物联网科技有限公司 | Vibration-damping bicycle TRT |
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| CN108591338A (en) | 2018-09-28 |
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