CN112196698B - Non-full-circumference opening flow-limiting boosting type one-way valve - Google Patents
Non-full-circumference opening flow-limiting boosting type one-way valve Download PDFInfo
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- CN112196698B CN112196698B CN202011194880.2A CN202011194880A CN112196698B CN 112196698 B CN112196698 B CN 112196698B CN 202011194880 A CN202011194880 A CN 202011194880A CN 112196698 B CN112196698 B CN 112196698B
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- valve core
- valve
- way valve
- flow
- oil outlet
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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
- F02K9/44—Feeding propellants
- F02K9/56—Control
- F02K9/58—Propellant feed valves
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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
- F02K9/44—Feeding propellants
- F02K9/56—Control
- F02K9/566—Control elements and safety devices, e.g. pressure relief valves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a one-way valve for a liquid rocket engine, in particular to a non-full-circumference opening flow-limiting boosting type one-way valve, which aims to solve the problem that when the existing one-way valve of an engine is used at the flow of 0.5-1.5 g/s, the valve core of the one-way valve is unstable in flutter during working, and even the structure of the engine is damaged. The technical scheme adopted by the invention is as follows: a non-full-circumference opening flow-limiting boosting type one-way valve comprises a valve body, a valve core, a spring and a baffle ring; the inner wall of the valve body is coaxially provided with an annular bulge, and the annular bulge is provided with at least one current-limiting through hole along the axial direction; the annular bulge divides the valve body into an oil inlet cavity and an oil outlet cavity, and the oil outlet cavity is provided with two stages of stepped holes; one end of the valve core is provided with a two-stage boss matched with the oil outlet cavity, and the outer circle surface of the large-diameter end of the two-stage boss is provided with a plurality of through grooves; a gap is formed between the end surface of the small-diameter end of the two-stage boss and the end surface of the annular boss positioned on the side of the oil outlet cavity; the valve core positioned in the oil inlet cavity is sleeved with a spring.
Description
Technical Field
The invention relates to a one-way valve for a liquid rocket engine, in particular to a non-full-circumference opening flow-limiting boosting type one-way valve.
Background
One-way valves are a type of valve commonly used in liquid rocket engine systems and generally function to prevent reverse leakage of the exit medium. With the continuous development of aerospace technology, the flow requirements of some system liquid paths are very low, and even the use requirements of 0.5-1.5 g/s flow are put forward in the development of a micro engine. When the conventional check valve is used for the micro flow, the phenomenon of unstable working-flutter of the valve core occurs, the guide surface of the valve core is seriously abraded in the flutter process, the flow and front and back pressure of the check valve fluctuate, and the oscillation of a propellant supply system of an engine is caused, even the structure of the engine is damaged.
Disclosure of Invention
The invention provides a non-full-circumference opening flow-limiting boosting type one-way valve, aiming at solving the problem that when the existing one-way valve of an engine is used at the flow of 0.5-1.5 g/s, the valve core of the one-way valve is unstable in flutter during operation, and even the structure of the engine is damaged.
The technical scheme adopted by the invention is as follows: a non-full-circumference opening flow-limiting boosting type one-way valve is characterized in that:
comprises a valve body, a valve core, a spring and a baffle ring;
the inner wall of the valve body is coaxially provided with an annular bulge, and the annular bulge is provided with at least one current-limiting through hole along the axial direction;
the annular bulge divides the valve body into an oil inlet cavity and an oil outlet cavity, and the oil outlet cavity is provided with two stages of stepped holes;
one end of the valve core is provided with a two-stage boss matched with the oil outlet cavity, the two-stage boss can movably penetrate through the oil outlet cavity, and the other end of the valve core penetrates through the annular bulge and then extends into the oil inlet cavity;
the outer circle surface of the large-diameter end of the two-stage boss is provided with a plurality of through grooves; the plurality of through grooves are uniformly distributed along the circumferential direction; a gap is formed between the end face of the small-diameter end of the two-stage boss and the end face of the annular boss located on one side of the oil outlet cavity, and the gap is 0.1mm +/-0.05 mm.
The valve core positioned in the oil inlet cavity is sleeved with the spring, one end of the spring is in contact with the end face of the annular bulge positioned on one side of the oil inlet cavity, the other end of the spring is limited on the valve core through a retaining ring, an annular groove is formed in the valve core, and the retaining ring is installed on the annular groove.
Furthermore, the number of the current-limiting through holes is two, and the current-limiting through holes are symmetrically arranged on the annular protrusion.
Furthermore, the joint position between the two stages of stepped holes of the valve body is set to be a round chamfer, and the joint position of the large-diameter end and the small-diameter end of the two stages of boss is set to be a conical surface matched with the round chamfer.
Furthermore, the end section of the through groove is semicircular, the radius of the end section is 0.5mm +/-0.1 mm, and the four through grooves are uniformly distributed on the valve core.
Compared with the prior art, the invention has the following beneficial effects:
the non-full-circumference opening flow-limiting boosting type one-way valve is simple in structure and good in stability, and when the flow of a medium fluid in an oil inlet cavity is smaller than 0.5g/s, the hydraulic force formed by the medium fluid in the gap provides a part of valve core opening maintaining force by arranging the flow-limiting through hole and the through groove and arranging the gap between the annular bulge and the valve core; when medium fluid with the flow rate of 0.5-1.5 g/s flows through, the pressure difference between the front and the back of the valve core is improved, the opening maintaining force of the valve core is increased, the valve core is always kept at a stop position against the compression force of a spring, the use requirement of the flow rate of 0.5-1.5 g/s in a miniature engine is met, the working stability of the valve core is improved, the service life is prolonged, the backflow of propellant or fuel gas of the engine is avoided, and the safety of an engine system is improved.
The non-full-circumference opening flow-limiting boosting type one-way valve has the advantages that the arranged conical sealing surface has good sealing performance and high reliability, automatic alignment between the valve core and the valve body is convenient, and the valve core is more convenient to assemble.
The non-full-circumference opening flow-limiting boosting type one-way valve is suitable for occasions with small flow, high temperature and low temperature, wide working pressure, frequent opening and closing and flow in the range of 1-5 g/s by changing the structural size of the one-way valve.
Drawings
FIG. 1 is a cross-sectional view of a non-full perimeter open, flow-restricting, force-amplifying check valve of the present invention.
FIG. 2 is a side view of a non-full perimeter open, flow-restricting, force-amplifying check valve of the present invention.
FIG. 3 is a diagram illustrating the injection of a non-full perimeter open flow-limiting booster check valve with a medium fluid.
FIG. 4 is a perspective view of a non-full-periphery open flow-limiting boosting check valve core of the present invention.
In the figure:
1-valve body, 2-valve core, 3-spring, 4-baffle ring, 5-annular bulge, 6-flow-limiting through hole, 7-through groove, 8-annular groove and 9-gap.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments do not limit the present invention.
As shown in fig. 1 and fig. 2, the non-full-circumference opening flow-limiting boosting type check valve in the present embodiment includes a valve body 1, a valve core 2, a spring 3 and a retainer ring 4;
an annular bulge 5 is coaxially arranged on the inner wall of the valve body 1, two current-limiting through holes 6 are formed in the annular bulge 5 along the axial direction, and the two current-limiting through holes 6 are symmetrically arranged on the annular bulge 5;
the annular bulge 5 divides the valve body 1 into an oil inlet cavity and an oil outlet cavity, the oil outlet cavity is formed by two stages of stepped holes, a connecting part between the two stages of stepped holes is formed by a circular chamfer, and the connecting position of a large-diameter end and a small-diameter end of the two stages of bulge platforms is formed by a conical surface matched with the circular chamfer, so that the valve core 2 and the valve body 1 can be automatically aligned conveniently.
The conical surface can be set as a metal conical surface, so that the heat-resistant steel plate has the advantage of high temperature resistance;
one end of the valve core 2 is provided with a two-stage boss matched with the oil outlet cavity, the two-stage boss can movably penetrate through the oil outlet cavity, and the other end of the valve core 2 penetrates through the annular bulge 5 and then extends into the oil inlet cavity;
as shown in fig. 4, four through grooves 7 are formed on the outer circumferential surface of the large-diameter end of the two-stage boss; the four through grooves 7 are uniformly distributed along the circumferential direction, the end section of each through groove 7 is semicircular, and the radius of the end section is 0.5 mm; as shown in fig. 3, a gap 9 is formed between the end surface of the small diameter end of the two-stage boss and the end surface of the annular boss 5 on the side of the oil outlet cavity, and in this embodiment, the gap 9 is set to be 0.1 mm;
the valve core 2 positioned in the oil inlet cavity is sleeved with the spring 3, one end of the spring 3 is in contact with the end surface of the annular bulge 5 positioned at one side of the oil inlet cavity, and the other end of the spring is limited on the valve core 2 through the baffle ring 4;
the valve core 2 is provided with an annular groove 8, and the baffle ring 4 is arranged on the annular groove 8.
The assembly sequence of the check valve of the invention is as follows: firstly, the valve core 2 is inserted into the valve body 1, then the spring 3 is sleeved on the valve body 1, the spring 3 is compressed on the valve core 2 by the retaining ring 4, and the retaining ring 4 is spread and clamped into the annular groove 8, and meanwhile, a gap is reserved between the annular bulge 5 and the valve core 2.
When the check valve is used, the check valve has the following three working states:
when medium fluid flows through the one-way valve, the flow of the medium fluid is less than 0.5g/s, the medium fluid enters from the oil inlet cavity and is directly sprayed onto the end surface of the valve core 2 through the flow-limiting through hole 6, so that the medium fluid with a certain flow velocity is sprayed and stagnated on the end surface of the valve core 2, and the hydrodynamic force formed in the gap provides a part of valve core opening maintaining force;
when the medium fluid flow in the oil inlet cavity reaches 0.5g/s, the fluid pressure of the medium fluid in the valve body 1 is increased, and the medium fluid pressure acting on the area of the valve core 2 overcomes the compression force of the spring to slightly open the valve core 2;
when the flow rate of the medium fluid in the oil inlet cavity reaches the range of 0.5-1.5 g/s, after the medium fluid flows out through the through groove 7, the flow resistance of the front and the back of the valve core 2 is increased, the pressure difference of the front and the back of the valve core 2 is increased, the opening maintaining force of the valve core 2 is increased, so that the valve core 2 is always kept at a stop position by overcoming the spring force, and the working stability of the valve core is enhanced; at the moment, the pressure difference of the through groove 7 in front of and behind the valve core provides the opening maintaining force of the other part of the valve core, and the phenomenon of flutter caused by the fact that the valve core 2 is opened and closed in a reciprocating mode due to the fact that the fluid resistance of the medium fluid is smaller than the compression force of the spring is avoided.
Thirdly, when the flow of the medium fluid in the oil inlet cavity is larger than 1.5g/s, the pressure of the medium fluid acting on the area of the valve core 2 overcomes the resultant force of the opening maintaining force of the two valve cores and the compression force of the spring, the large end faces of the two-stage bosses of the valve core 2 are pushed to move to the outside of the valve body 1, and the valve core 2 is completely opened.
In the embodiment, the gap distance between the end surface of the annular bulge 5 positioned on the oil outlet cavity side and the small end surface of the two-stage bulge platform of the valve core 2 is set to be 0.1mm, and when fluid is sprayed on the end surface of the valve core 2 at the flow speed of 1.27-3.81 m/s and stagnates, hydrodynamic force is formed on the end surface of the valve core 2, so that a part of valve core opening maintaining force is provided.
The flow resistance characteristic of the non-full-circumference opening flow-limiting boosting type one-way valve is completely similar to an upward opening quadratic parabolic curve, and the non-full-circumference opening flow-limiting boosting type one-way valve can be fully opened at a small flow, is high in stability of a valve core, and is suitable for occasions with small flow and high reliability requirements.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A non-full-circumference opening flow-limiting boosting type one-way valve is characterized in that:
comprises a valve body (1), a valve core (2), a spring (3) and a baffle ring (4);
an annular bulge (5) is coaxially arranged on the inner wall of the valve body (1), and at least one current-limiting through hole (6) is formed in the annular bulge (5) along the axial direction;
the annular bulge (5) divides the valve body (1) into an oil inlet cavity and an oil outlet cavity, and the oil outlet cavity is provided with two stages of stepped holes;
one end of the valve core (2) is provided with a two-stage boss matched with the oil outlet cavity, the two-stage boss can movably penetrate through the oil outlet cavity, and the other end of the valve core (2) penetrates through the annular bulge (5) and then extends into the oil inlet cavity;
the outer circle surface of the large-diameter end of the two-stage boss is provided with a plurality of through grooves (7); the through grooves (7) are uniformly distributed along the circumferential direction; a gap (9) is formed between the end surface of the small-diameter end of the two-stage boss and the end surface of the annular boss (5) on one side of the oil outlet cavity;
the valve core (2) positioned in the oil inlet cavity is sleeved with the spring (3), one end of the spring (3) is in contact with the end face of the annular bulge (5) positioned on one side of the oil inlet cavity, and the other end of the spring is limited on the valve core (2) through the retaining ring (4).
2. A non-full perimeter open, flow-restricting, force-amplifying one-way valve as defined in claim 1, wherein: and a gap (9) between the end surface of the small-diameter end of the two-stage boss and the end surface of the annular boss (5) positioned on the side of the oil outlet cavity is 0.1mm +/-0.05 mm.
3. A non-full perimeter open, flow-restricting, force-amplifying one-way valve as defined in claim 2, wherein: the two current-limiting through holes (6) are symmetrically arranged on the annular bulge (5).
4. A non-full perimeter open, flow-restricting, force-amplifying one-way valve as defined in claim 3 wherein: the connecting position between the two stages of stepped holes of the valve body (1) is set to be a round chamfer, and the connecting position of the large-diameter end and the small-diameter end of the two stages of boss platforms is set to be a conical surface matched with the round chamfer.
5. A non-full perimeter open, flow-restricting, force-amplifying one-way valve according to any one of claims 1 to 4, wherein: the end section of the through groove (7) is semicircular, and the radius of the end section is 0.5mm +/-0.1 mm.
6. A non-full perimeter open, flow-restricting, force-amplifying one-way valve as defined in claim 5 wherein: the number of the through grooves (7) is four, and the through grooves are uniformly distributed on the valve core (2).
7. A non-full perimeter open, flow-restricting, force-amplifying one-way valve as defined in claim 6, wherein: an annular groove (8) is formed in the valve core (2), and the baffle ring (4) is installed on the annular groove (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194880.2A CN112196698B (en) | 2020-10-30 | 2020-10-30 | Non-full-circumference opening flow-limiting boosting type one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194880.2A CN112196698B (en) | 2020-10-30 | 2020-10-30 | Non-full-circumference opening flow-limiting boosting type one-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112196698A CN112196698A (en) | 2021-01-08 |
| CN112196698B true CN112196698B (en) | 2021-07-20 |
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| CN202011194880.2A Active CN112196698B (en) | 2020-10-30 | 2020-10-30 | Non-full-circumference opening flow-limiting boosting type one-way valve |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858448A (en) * | 2010-07-08 | 2010-10-13 | 厦门松霖科技有限公司 | Water-saving check valve |
| CN203395308U (en) * | 2013-08-05 | 2014-01-15 | 瑞立集团瑞安汽车零部件有限公司 | Overflow valve |
| CN204985868U (en) * | 2015-09-23 | 2016-01-20 | 四川沃兰特阀门制造有限公司 | Small -bore high -pressure axial -flow type check valve |
| CN105422928A (en) * | 2015-12-09 | 2016-03-23 | 西安航天动力研究所 | Self-locking check valve reliable in locking position |
| CN207599128U (en) * | 2017-11-21 | 2018-07-10 | 王华荣 | A kind of level pressure conductive device |
| CN109826969A (en) * | 2019-04-03 | 2019-05-31 | 郭怀宝 | The adjustable valve of the amount of restriction of a kind of pair of fluid |
| CN110081211A (en) * | 2019-04-28 | 2019-08-02 | 贵州曼格维流体智能科技有限公司 | A kind of check valve for Satellite attitude and orbit control propellant-feed system |
-
2020
- 2020-10-30 CN CN202011194880.2A patent/CN112196698B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858448A (en) * | 2010-07-08 | 2010-10-13 | 厦门松霖科技有限公司 | Water-saving check valve |
| CN203395308U (en) * | 2013-08-05 | 2014-01-15 | 瑞立集团瑞安汽车零部件有限公司 | Overflow valve |
| CN204985868U (en) * | 2015-09-23 | 2016-01-20 | 四川沃兰特阀门制造有限公司 | Small -bore high -pressure axial -flow type check valve |
| CN105422928A (en) * | 2015-12-09 | 2016-03-23 | 西安航天动力研究所 | Self-locking check valve reliable in locking position |
| CN207599128U (en) * | 2017-11-21 | 2018-07-10 | 王华荣 | A kind of level pressure conductive device |
| CN109826969A (en) * | 2019-04-03 | 2019-05-31 | 郭怀宝 | The adjustable valve of the amount of restriction of a kind of pair of fluid |
| CN110081211A (en) * | 2019-04-28 | 2019-08-02 | 贵州曼格维流体智能科技有限公司 | A kind of check valve for Satellite attitude and orbit control propellant-feed system |
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| Publication number | Publication date |
|---|---|
| CN112196698A (en) | 2021-01-08 |
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