CN112483280A - Liquid follow-up anti-shaking device and box body - Google Patents
Liquid follow-up anti-shaking device and box body Download PDFInfo
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- CN112483280A CN112483280A CN202011238189.XA CN202011238189A CN112483280A CN 112483280 A CN112483280 A CN 112483280A CN 202011238189 A CN202011238189 A CN 202011238189A CN 112483280 A CN112483280 A CN 112483280A
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- guide rail
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/60—Constructional parts; Details not otherwise provided for
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Abstract
The invention discloses a liquid follow-up anti-shaking device which comprises a guide rail, an anti-shaking plate and a limiting block, wherein the anti-shaking plate is arranged on the guide rail in a sliding manner, an inclined plane is processed on the side surface of the anti-shaking plate, which faces to the guide rail, and the anti-shaking plate floats on the liquid level; the limiting block is arranged between the guide rail and the anti-shaking plate and is provided with a first side surface and a second side surface which are opposite, the first side surface is abutted against the inclined surface, and the second side surface is abutted against the side surface of the guide rail facing the anti-shaking plate; the anti-shaking plate is under the action of liquid surface buoyancy, so that the anti-shaking plate generates extrusion force on the limiting block, friction force is generated between the limiting block and the guide rail, and the decomposition force of the extrusion force along the trend of the guide rail is not more than the friction force, so that the anti-shaking plate cannot be separated from the liquid surface. The anti-shaking plate can be self-adapted to the height of the liquid level, and has the advantages of light weight, good anti-shaking effect and strong stability.
Description
Technical Field
The invention relates to the field of liquid carrying equipment, in particular to a liquid follow-up anti-shaking device.
Background
The shaking of the liquid carrier rocket storage tank propellant generally refers to the periodic motion of the propellant caused by rocket body vibration, engine thrust change, wind trimming or gust and the like in the flying process of the rocket. The shaking of the liquid propellant has a great influence on the flight stability of the liquid carrier rocket. In order to provide a carrier rocket with good flight stability, the sloshing damping of the tank propellant must be improved to suppress sloshing of the liquid, thereby achieving the design requirement of attitude stabilization. The common measure for increasing the liquid shaking damping is that a plurality of anti-shaking plates are arranged in the storage tank layer by layer along the depth direction of the storage tank, although the propellant is shaken to a certain extent, the anti-shaking plates are more to make the whole mass of the storage tank larger, and the anti-shaking effect of the design is periodic variation along with the reduction of the liquid in the storage tank, and the anti-shaking effect is unstable.
Disclosure of Invention
The present invention is directed to a liquid follow-up anti-sloshing apparatus capable of reducing its own weight and having a stable anti-sloshing effect, so as to solve the problems of the background art.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
on one hand, the invention provides a liquid follow-up anti-shaking device, which comprises a guide rail, an anti-shaking plate and a limiting block, wherein:
the anti-shaking plate is arranged on the guide rail in a sliding mode, an inclined plane is machined on the side face, facing the guide rail, of the anti-shaking plate, and the anti-shaking plate floats on the liquid level;
the limiting block is arranged between the guide rail and the anti-sway plate and is provided with a first side surface and a second side surface which are opposite, the first side surface is abutted against the inclined surface, and the second side surface is abutted against the side surface of the guide rail facing the anti-sway plate;
the anti-shaking plate is under the action of liquid surface buoyancy, so that the anti-shaking plate generates extrusion force on the limiting block, friction force is generated between the limiting block and the guide rail, and the decomposition force of the extrusion force along the trend of the guide rail is not greater than the friction force, so that the anti-shaking plate cannot be separated from the liquid surface.
Preferably, the guide rail includes the body, the body lateral wall is opened along its length direction has at least one guide slot, prevent shaking board one end and be provided with the spout with guide rail sliding fit, be equipped with the slider that matches with the guide slot on the spout.
Preferably, the two opposite side walls of the body are respectively provided with a guide groove along the length direction, the two opposite side walls of the sliding groove are provided with two sliding blocks, and the two sliding blocks are respectively in sliding fit with the two guide grooves.
Preferably, the anti-sway plate comprises a plate body and a connecting block, the connecting block is in sliding fit with the guide rail, the sliding groove is machined in the connecting block, the inclined plane is machined at the groove bottom of the sliding groove, and the two sliding blocks are machined in the connecting block.
Preferably, an included angle between the inclined surface of the anti-sloshing plate and the guide rail is θ, where θ satisfies formula 1), and the formula 1) is:
f F1cosθ≥F1sinθ-m2nxg
in the formula: n isxIs the axial overload factor;
g is gravity acceleration, and is 9.81 (m/s)2)；
m2The mass (kg) of the limiting block;
f is the friction coefficient between the limiting block and the sliding guide rail;
F1the force of the anti-shaking plate acting on the limiting block is perpendicular to a matching inclined plane between the limiting block and the anti-shaking plate, namely a unit (N).
Preferably, the top surface of the anti-sloshing plate is detachably provided with a buoyancy adjusting mechanism.
Preferably, the buoyancy adjusting mechanism is a hollow structure.
Preferably, the buoyancy adjusting mechanism is a cube.
Preferably, the buoyancy of the liquid to the anti-sloshing plate and the buoyancy adjusting mechanism is F2What is, what isF is described2Satisfying the requirement of formula 2), wherein the formula 2) is as follows:
F2≥(m1+m2)nxmaxgs
in the formula, nxmaxN when different liquids are carried for maximum axial overload factorxmaxDifferent;
g is gravity acceleration, and is 9.81 (m/s)2)；
m1Mass (kg) of the anti-sloshing plate;
m2the mass (kg) of the limiting block;
s is a coefficient, and the value range of s is 1.2-1.5.
In another aspect, the present invention provides a liquid follow-up anti-sloshing tank including a liquid follow-up anti-sloshing apparatus.
The invention has the beneficial effects that:
the liquid follow-up anti-shaking device provided by the invention has the advantages that the anti-shaking plate can descend along with the descending of the liquid level through the mutual matching of the guide rail, the anti-shaking plate and the limiting block, the change of the liquid level of the self-adaptive bearing can be realized, the anti-shaking plate can not ascend due to the rising of the liquid level through the friction force between the guide rail and the limiting block, and the self-locking of the anti-shaking plate is realized.
The liquid follow-up anti-sloshing device is applied to the field of spaceflight, the fuel gradually decreases along with the rising of the rocket, the anti-sloshing plate descends along with the descending of the liquid level of the fuel, the real-time anti-sloshing on the surface of the fuel is realized, the influence of the sloshing of the liquid level on the spaceflight device is favorably reduced, and compared with the existing anti-sloshing design, the liquid follow-up anti-sloshing device has the advantages of reduced weight and positive effect on the spaceflight device.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a sectional view taken along a-a in fig. 1.
The labels in the figure are: the device comprises a guide rail 1, a guide groove 101, a limiting block 2, an anti-shaking plate 3, a plate body 301, a connecting block 302, a sliding block 303, a buoyancy adjusting mechanism 4 and a box body 5.
Detailed Description
The technical solutions in the present embodiments will be clearly and completely described below with reference to the accompanying drawings in the present embodiments, which, however, should not be construed as limiting the invention to specific embodiments, but are for explanation and understanding only:
as shown in fig. 1 and 2, the present embodiment provides a liquid follow-up anti-sloshing device, which includes a guide rail 1, an anti-sloshing plate 3, and a limiting block 2.
The anti-shaking plate 3 is arranged on the guide rail 1 in a sliding mode, and the anti-shaking plate 3 floats on the liquid level.
The guide rail 1 comprises a body which is rectangular, and the side wall of the body is provided with at least one guide groove 101 along the length direction.
The anti-shaking plate 3 comprises a plate body 301 and a connecting block 302, the connecting block 302 is arranged at one end of the plate body 301, the connecting block 302 is in sliding fit with the guide rail 1, the shape of the plate body 301 of the limiting plate 3 is unlimited, and the anti-shaking plate can be a square plate body or a plate body with an arc edge. The plate body 301 and the connecting block 302 may be integrally formed, and while ensuring stability of the guide rail 1, the plate body 301 may be designed as a thin plate to reduce the weight of the anti-sway plate 3, in this embodiment, the anti-sway plate 3 is made of a material that does not react with the solution.
Open on the connecting block 302 has guide rail 1 sliding fit's spout, the width of spout slightly is greater than guide rail 1's width, to having better spacing effect to preventing shaking plate 3, reduce and prevent shaking plate 3 and be located the space of rocking of 1 both sides plate body 301 of guide rail, promote and prevent shaking plate 3 and to the effect of preventing shaking of liquid, be equipped with the slider 303 who matches with guide slot 101 on the spout, guide slot 101 and slider 303 cooperate, to preventing shaking plate 3 limiting displacement, avoid preventing shaking plate 3 and break away from guide rail 1. Both sliders 303 are machined on the connecting block 302.
In this embodiment, two opposite side walls of the body are respectively provided with one guide groove 101 along the length direction thereof, two sliding blocks 303 are arranged on the two opposite side walls of the sliding groove, and the two sliding blocks 303 are respectively in sliding fit with the two guide grooves 101. The guide groove 101 that sets up relatively, the symmetry just is favorable to promoting the stability and the incorruptibility of preventing shaking board 3, avoids the guide groove 101 and the slider 303 of unilateral to warp after long-time use and leads to preventing shaking board 3 to incline towards one direction, and then the anti-shaking effect of preventing shaking board 3 to liquid that leads to is poor.
The side of the anti-sway plate 3 contacting the guide rail 1 is processed with an inclined plane, i.e. the inclined plane is processed at the bottom of the chute, the limiting block 2 is arranged between the guide rail 1 and the connecting block 302 of the anti-sway plate 3, one side of the limiting block 2 is abutted against the inclined plane, and the other side of the limiting block 2 is abutted against the side of the guide rail 1 facing the anti-sway plate 3.
Namely in the use, along with the decline of liquid level, prevent 3 decline of shake board and contact with the liquid level all the time, liquid rocks the in-process and produces buoyancy and thrust to preventing shake board 3, prevent shake board 3 then will receive buoyancy and thrust and convert the extrusion force to stopper 2, the face that contacts with the inclined plane on the extrusion force perpendicular to stopper 2, frictional force has between stopper 2 and the guide rail 1, the decomposition force of extrusion force along the 1 trend of guide rail is not more than frictional force, make prevent shake board 3 can not break away from the liquid level because of the buoyancy and the thrust that receive, and remain on the liquid level all the time, contact with the liquid level, reduce rocking of liquid level.
The included angle between the inclined plane of the anti-shaking plate 3 and the guide rail 1 is theta, and the theta meets the requirement of the following formula, so that the anti-shaking plate 3 can achieve the effect of descending along with the liquid level but not being pushed up by the liquid level.
The formula is as follows: f F1cosθ≥F1sinθ-m2nxg
In the formula: n isxThe axial overload coefficient is adopted, and when the rocket takes off, the rocket needs to be decelerated from the intermediate state to zero or accelerated from the intermediate state to the maximum state within a very short time, the limiting block 2 needs to bear the axial overload;
g is the gravity acceleration, and 9.81(m/s 2) is taken;
m2the mass (kg) of the limiting block 2;
f is the friction coefficient between the limiting block 2 and the sliding guide rail 1;
F1the extrusion force acting on the limiting block 2 by the anti-shaking plate 3 is perpendicular to the inclined plane between the limiting block 2 and the anti-shaking plate 3, namely the unit (N).
In this embodiment, 3 top surfaces of preventing shaking board can be dismantled there is buoyancy adjustment mechanism 4, and modes such as accessible joint, bolt realize dismantling the connection, buoyancy adjustment mechanism 4 is hollow structure, compares in solid construction, and hollow structure can provide bigger buoyancy under the circumstances that weight is little, and buoyancy adjustment mechanism 4 has multiple specification, and different specification volumes are different. The buoyancy adjusting mechanism 4 is made of a material which does not react with the solution, and the buoyancy of the liquid to the anti-sloshing plate 3 is changed through the volume of the buoyancy adjusting mechanism immersed in the liquid, so that the anti-sloshing plate 3 can keep the effect of floating on the liquid surface. Can be to the density of the liquid of waiting to prevent shaking, change the buoyancy adjustment mechanism 4 of different volumes, make the effect of preventing shaking of preventing shaking board 3 all be in better state, liquid density is big, then the buoyancy adjustment mechanism 4's of chooseing for use is bulky, and liquid density is little, then the buoyancy adjustment mechanism 4's of chooseing for use small, and buoyancy adjustment mechanism 4 is the cube, and the structure of cube is more convenient for make, is convenient for its volumetric calculation.
Buoyancy F of liquid to slosh-proof plate 3 and buoyancy regulating mechanism 42The requirements of the following formula should be met,
F2≥(m1+m2)nxmaxgs
in the formula, nxmaxN when different liquids are carried for maximum axial overload factorxmaxDifferent;
g is the gravity acceleration, and 9.81(m/s 2) is taken;
m1mass (kg) of the anti-sloshing plate 3;
m2the mass (kg) of the limiting block 2;
s is a coefficient, and the value range of s is 1.2-1.5. The value range is derived from experimental results.
According to a liquid follow-up of this embodiment preparation prevent shaking box 5, including box 5, install several liquid follow-up in the box 5 and prevent shaking the device, several guide rail 1 sets up along the depth direction of box 5, select suitable buoyancy adjustment mechanism 4 according to the density that bears liquid, and two buoyancy adjustment mechanism 4 install on preventing shaking board 3, will prevent shaking board 3 slidable mounting on guide rail 1, insert each stopper 2 again corresponding guide rail 1 and prevent shaking between board 3, closed box 5 injects into the liquid that bears.
It is to be understood that the above examples are merely illustrative for clarity of description and are not limiting on the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a liquid follow-up prevents shaking device which characterized in that: including the guide rail, prevent shaking board and stopper, wherein:
the anti-shaking plate is arranged on the guide rail in a sliding mode, an inclined plane is machined on the side face, facing the guide rail, of the anti-shaking plate, and the anti-shaking plate floats on the liquid level;
the limiting block is arranged between the guide rail and the anti-sway plate and is provided with a first side surface and a second side surface which are opposite, the first side surface is abutted against the inclined surface, and the second side surface is abutted against the side surface of the guide rail facing the anti-sway plate;
the anti-shaking plate is under the action of liquid surface buoyancy, so that the anti-shaking plate generates extrusion force on the limiting block, friction force is generated between the limiting block and the guide rail, and the decomposition force of the extrusion force along the trend of the guide rail is not greater than the friction force, so that the anti-shaking plate cannot be separated from the liquid surface.
2. The liquid follow-up anti-sloshing apparatus according to claim 1, wherein: the guide rail comprises a body, at least one guide groove is formed in the side wall of the body along the length direction of the side wall of the body, a sliding groove in sliding fit with the guide rail is formed in one end of the anti-sway plate, and a sliding block matched with the guide groove is arranged on the sliding groove.
3. The liquid follow-up anti-sloshing apparatus according to claim 2, wherein: the two opposite side walls of the body are respectively provided with a guide groove along the length direction of the body, two sliding blocks are arranged on the two opposite side walls of the sliding groove, and the two sliding blocks are respectively in sliding fit with the two guide grooves.
4. The liquid follow-up anti-sloshing apparatus according to claim 3, wherein: the anti-shaking plate comprises a plate body and a connecting block, the connecting block is in sliding fit with the guide rail, the sliding groove is machined in the connecting block, the inclined plane is machined at the groove bottom of the sliding groove, and the two sliding blocks are machined in the connecting block.
5. The liquid follow-up anti-sloshing apparatus according to claim 1 or 4, wherein: the included angle between the inclined plane of the anti-shaking plate and the guide rail is theta, and theta satisfies formula 1), wherein formula 1) is as follows:
f F1cosθ≥F1sinθ-m2nxg
in the formula: n isxIs the axial overload factor;
g is gravity acceleration, and is 9.81 (m/s)2)；
m2The mass (kg) of the limiting block;
f is the friction coefficient between the limiting block and the sliding guide rail;
F1the force of the anti-shaking plate acting on the limiting block is perpendicular to a matching inclined plane between the limiting block and the anti-shaking plate, namely a unit (N).
6. The liquid follow-up anti-sloshing apparatus according to claim 1, wherein: the top surface of the anti-shaking plate is detachably provided with a buoyancy adjusting mechanism.
7. The liquid follow-up anti-sloshing apparatus according to claim 6, wherein: the buoyancy adjusting mechanism is of a hollow structure.
8. The liquid follower sloshing prevention device according to claim 7, wherein: the buoyancy adjusting mechanism is a cube.
9. The liquid follow-up anti-sloshing apparatus according to claim 6, wherein: the method is characterized in that: the buoyancy of the liquid to the anti-sloshing plate and the buoyancy regulating mechanism is F2Said F2Satisfying the requirement of formula 2), wherein the formula 2) is as follows:
F2≥(m1+m2)nxmaxgs
in the formula, nxmaxN when different liquids are carried for maximum axial overload factorxmaxDifferent;
g is gravity acceleration, and is 9.81 (m/s)2)；
m1Mass (kg) of the anti-sloshing plate;
m2the mass (kg) of the limiting block;
s is a coefficient, and the value range of s is 1.2-1.5.
10. The utility model provides a liquid follow-up prevents shaking box which characterized in that: comprising a liquid follow-up anti-sloshing device according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011238189.XA CN112483280B (en) | 2020-11-09 | 2020-11-09 | Liquid follow-up anti-shaking device and box body |
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| CN202011238189.XA CN112483280B (en) | 2020-11-09 | 2020-11-09 | Liquid follow-up anti-shaking device and box body |
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| CN112483280B CN112483280B (en) | 2023-03-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464314A (en) * | 2021-06-30 | 2021-10-01 | 航天科工火箭技术有限公司 | Anti-shaking device and liquid rocket |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1243054B (en) * | 1964-03-25 | 1967-06-22 | Ver Flugtechnische Werke Ges M | Device to hinder the sloshing movement of the liquid in containers, especially in the fuel containers of rockets |
| US6220287B1 (en) * | 2000-02-03 | 2001-04-24 | The Boeing Company | Baffle for suppressing slosh in a tank and a tank for incorporating same |
| KR20090052064A (en) * | 2007-11-20 | 2009-05-25 | 한국항공우주연구원 | Device to attenuate the fluid-sloshing in a tank and rocket using the same |
| CN104495130A (en) * | 2014-12-22 | 2015-04-08 | 山东交通学院 | Tank truck capable of preventing liquid from shaking |
| CN205503308U (en) * | 2016-01-19 | 2016-08-24 | 哈尔滨工业大学深圳研究生院 | Conduit head kickboard formula prevents shaking structure |
| US20160318708A1 (en) * | 2014-01-13 | 2016-11-03 | Embry-Riddle Aeronautical University, Inc. | Floating active baffles, system and method of slosh damping comprising the same |
| CN109625671A (en) * | 2018-11-27 | 2019-04-16 | 北京宇航系统工程研究所 | A kind of big rigidity Anti-shaking structure deformation-compensated suitable for Cryogenic tank band circumferential direction |
-
2020
- 2020-11-09 CN CN202011238189.XA patent/CN112483280B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1243054B (en) * | 1964-03-25 | 1967-06-22 | Ver Flugtechnische Werke Ges M | Device to hinder the sloshing movement of the liquid in containers, especially in the fuel containers of rockets |
| US6220287B1 (en) * | 2000-02-03 | 2001-04-24 | The Boeing Company | Baffle for suppressing slosh in a tank and a tank for incorporating same |
| KR20090052064A (en) * | 2007-11-20 | 2009-05-25 | 한국항공우주연구원 | Device to attenuate the fluid-sloshing in a tank and rocket using the same |
| US20160318708A1 (en) * | 2014-01-13 | 2016-11-03 | Embry-Riddle Aeronautical University, Inc. | Floating active baffles, system and method of slosh damping comprising the same |
| CN104495130A (en) * | 2014-12-22 | 2015-04-08 | 山东交通学院 | Tank truck capable of preventing liquid from shaking |
| CN205503308U (en) * | 2016-01-19 | 2016-08-24 | 哈尔滨工业大学深圳研究生院 | Conduit head kickboard formula prevents shaking structure |
| CN109625671A (en) * | 2018-11-27 | 2019-04-16 | 北京宇航系统工程研究所 | A kind of big rigidity Anti-shaking structure deformation-compensated suitable for Cryogenic tank band circumferential direction |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464314A (en) * | 2021-06-30 | 2021-10-01 | 航天科工火箭技术有限公司 | Anti-shaking device and liquid rocket |
| CN113464314B (en) * | 2021-06-30 | 2022-07-15 | 航天科工火箭技术有限公司 | Anti-shaking device and liquid rocket |
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| CN112483280B (en) | 2023-03-03 |
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