CN214146623U - Extrusion formula round pin formula coupling assembling and liquid oxygen butterfly valve - Google Patents
Extrusion formula round pin formula coupling assembling and liquid oxygen butterfly valve Download PDFInfo
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- CN214146623U CN214146623U CN202022624225.8U CN202022624225U CN214146623U CN 214146623 U CN214146623 U CN 214146623U CN 202022624225 U CN202022624225 U CN 202022624225U CN 214146623 U CN214146623 U CN 214146623U
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Abstract
An extrusion type pin type connecting assembly comprises a pin body, a valve rod, a valve plate, a fixing pin and a fastening screw, wherein the valve rod is a cylindrical shaft body, and a U-shaped groove is formed in the shaft body; the valve plate is disc-shaped, the back of the valve plate is provided with a boss, a round hole is formed in the boss, and the valve rod shaft body is assembled in the round hole of the valve plate; the pin body is a combination body with a wedge-shaped key and a rectangular platform, the bottom surface of the pin body is tightly attached to the back surface of the valve plate, the wedge-shaped key is tightly assembled in the U-shaped groove of the valve rod, and the rectangular platform is provided with a pin hole and a screw hole and is fastened on the valve plate through a fixing pin and a fastening screw. The utility model discloses a connection structure stress state safe and reliable can use for a long time, also can satisfy the requirement under the low temperature operating mode.
Description
Technical Field
The utility model relates to an extrusion formula round pin formula coupling assembling and liquid oxygen butterfly valve belongs to aerospace, liquid rocket engine technical field for among the liquid oxygen butterfly valve of liquid rocket engine oxidant supply system.
Background
For more than half a century, with the continuous development of the aerospace industry, mankind has achieved tremendous achievements in conquering space and developing and utilizing space resources, which depends to a great extent on the continuous development of rocket propulsion technology. A batch of advanced liquid rocket engines are developed in the aerospace major countries of the world, and the engines form carrier rockets with various purposes, so that the launching of artificial satellites, manned aerospace, lunar landing, Mars detection, global satellite communication and television transmission are realized, and even the global Internet is established. Greatly promotes the development of human civilization and obtains immeasurable economic and social benefits.
The liquid rocket generally comprises a fairing, an instrument cabin, a stage section, an oxidant storage tank, a fuel storage tank, a pressurizing conveying system, an engine, a tail section and the like. The liquid rocket engine mainly comprises a thrust chamber, a turbopump, a gas generator, various valves, pipelines and the like. The valve types of the liquid rocket engine are continuously increased nowadays, and along with the application of a butterfly valve in a low-temperature oxidant conveying system, people gradually find that the stress condition of a connecting component part of the butterfly valve is severe and the connecting component part is easy to damage; and under the low temperature operating mode, the material of the opening and closing piece generates cold shrinkage deformation, so that the round pin is easy to loosen and fall off, the connection is failed, and the butterfly valve cannot work. Therefore, an effective technical means which can solve the problems that the liquid oxygen butterfly valve opening and closing piece is low in loss and easy to loosen and fall is urgently needed in the field of aerospace.
Disclosure of Invention
The technical solution problem of the utility model is that: the technical problems that the stress condition of the connecting component part of the butterfly valve is severe, the butterfly valve is easy to damage, and the material is deformed due to cold contraction under the low-temperature working condition, so that the connecting is failed are solved. This application is through proposing a new connected mode, changes the round pin formula connection form of the opening and closing member valve rod valve plate of original butterfly valve, has improved the stress state of round pin body at biography power in-process, and it is abominable to have overcome the coupling assembling part atress condition of butterfly valve, easily leads to damaging, makes the technical problem that the butterfly valve can not work.
The technical scheme of the utility model is that:
the application provides an extrusion type pin-type connecting assembly for a liquid rocket engine power oxidant supply system liquid
In the oxygen butterfly valve; the extrusion type pin type connecting assembly comprises a pin body 1, a valve rod 2, a valve plate 3, a fixing pin 4 and a fastening screw 5; the valve rod 2 is a cylindrical shaft body, and a U-shaped groove is formed in the shaft body; the valve plate 3 is disc-shaped, a boss is arranged on the back surface of the valve plate 3, a circular hole is formed in the boss, and a shaft body of the valve rod 2 is assembled in the circular hole of the valve plate 3;
preferably, the pin body comprises a wedge-shaped key and a rectangular platform, and the wedge-shaped key and the rectangular platform are of an integrated structure;
preferably, the bottom surface of the pin body 1 is tightly attached to the back surface of the valve plate 3, and the wedge-shaped key part is tightly assembled on the wedge-shaped key part
The U-shaped groove of the valve rod 2;
optionally, the rectangular table is provided with a pin hole and a screw hole, the pin hole is used for accommodating a fixing pin, and the screw hole is internally provided with a screw hole
For receiving a fastening screw; the rectangular table is fastened on the valve plate 3 through the fixing pin and the fastening screw;
optionally, the aperture of the pin hole is smaller than the aperture of the screw hole;
the application also provides a liquid oxygen butterfly valve which comprises a driving device and a connecting assembly, wherein the connecting assembly is an extrusion type pin connecting assembly;
the optional driving device is connected with the connecting assembly and drives the valve rod of the connecting assembly to rotate for 90 degrees, and the valve rod converts the rotating force into extrusion force through the pin body and transmits the extrusion force to the valve plate so as to rotate the valve plate for 90 degrees;
adopt the extrusion formula round pin formula is connected, its working process is: the butterfly valve driving device is connected with the head of the valve rod and drives the valve rod to do 90-degree rotary motion, the valve rod transmits rotary force to the valve plate through the pin body, and the outer circle surface of the valve plate is in close contact with or separated from the inner surface of the butterfly valve sealing ring, so that medium sealing or circulation is realized, and the purpose of opening and closing the valve is achieved.
Compared with the prior art, the utility model the advantage lie in: the utility model applies the extrusion pin type connection to the butterfly valve of the liquid rocket engine oxidant supply system, changes the original round pin connection into the extrusion pin type connection, changes the pin body from completely bearing shear stress to completely bearing extrusion force in the force transmission process, and improves the stress state of the pin body; and the problem that the butterfly valve cannot work due to connection failure caused by cold shrinkage deformation of the material under the low-temperature working condition is solved.
Drawings
FIG. 1 is a front view of a valve plate of a squeeze pin type connecting assembly of the present application in a closed configuration;
FIG. 2 is a front view of the extruded pin type connecting assembly of the present application with the valve plate open;
FIG. 3 is a sectional top view of the extruded pin type connecting assembly valve plate of the present application when the assembly is opened;
fig. 4 is a cross-sectional view of a pin body of a squeeze pin connection assembly of the present application;
FIG. 5 is a top view of a pin body of a squeeze pin connection assembly of the present application;
FIG. 6 is an elevation view of a valve stem of the squeeze pin connection assembly of the present application;
FIG. 7 is a cross-sectional view of a valve stem of the squeeze pin connection assembly of the present application;
FIG. 8 is an elevational, cross-sectional view of a valve plate of the squeeze pin connection assembly of the present application;
FIG. 9 is a top cross-sectional view of a valve plate of the extruded pin connection assembly of the present application;
FIG. 10 is a left side view of a valve plate of the squeeze pin connection assembly of the present application;
fig. 11 is a partial structure view of the pin body of the extrusion pin type connecting assembly according to the present application;
FIG. 12 is a cross-sectional view of a prior art round pin type connection assembly;
description of reference numerals:
1-pin body, 2-valve rod, 3-valve plate, 4-fixing pin, 5-fastening screw, 6-sealing ring and 7-actuator.
Detailed Description
The following description is made in conjunction with the accompanying drawings;
in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention;
the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified;
in the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for a person of ordinary skill in the art;
in the description herein, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples;
in the aerospace field, research and development of liquid rocket engines and related technologies thereof are one of the focuses of attention in the industry, and with the increasing variety of valves used by liquid rocket engines, especially with the introduction and application of the existing butterfly valves in liquid rocket engines, the technical problems that liquid oxygen butterfly valves (hereinafter referred to as butterfly valves) are large in loss and easy to loosen and fall are exposed, and reference is made to fig. 12;
in order to solve the technical problem, the utility model discloses a through the study of taking care of, discover among the prior art so some defects appear and not enough, mainly because the connection form of current butterfly valve opening and closing piece valve rod and valve plate has received very big restriction and has leaded to, the utility model discloses an inventor further discovers, and current butterfly valve opening and closing piece belongs to the connection form that the round pin cut straightly. On one hand, the connection form enables the transmission force to be completely converted into the shearing stress borne by the round pin to be transmitted when the valve rod transmits to the valve plate, and the stress situation of the round pin is severe. On the other hand, under the low-temperature working condition, the material of the opening and closing piece generates cold shrinkage deformation, so that the round pin is easy to loosen and fall off, the connection is failed, and the butterfly valve cannot work;
based on the above findings, in combination with the experience of a line of practice and work for many years, the inventors of the present invention have creatively proposed the concept of changing the connection manner and designed an extrusion type pin connection assembly. The present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 and 2 are structural front views of a press type pin connection valve plate applied for closing and opening respectively. FIG. 3 is a sectional top view of the extruded pin type valve plate of the present invention when it is opened;
the liquid rocket engine includes a thrust chamber, a turbo pump, a gas generator, and various valves (e.g., butterfly valves), various piping. Wherein the valve is used to effect fluid control. The butterfly valve at least comprises a driving device and a connecting assembly, wherein the connecting assembly is specifically connected in an extrusion pin mode and is applied to a liquid oxygen butterfly valve of a power oxidant supply system of a liquid rocket engine. When in actual use, the butterfly valve driving device is connected with the head of the valve rod and drives the valve rod to do 90-degree rotary motion, and the rotating force of the valve rod is completely converted into extrusion force through the pin body and is transmitted to the valve plate, so that the valve plate rotates by 90 degrees. Before the valve plate rotates, the outer circle sealing surface of the valve plate is in close contact with the inner surface of the butterfly valve sealing ring, and media in front of and behind the valve plate are cut off; after the valve plate rotates, the outer circle sealing surface of the valve plate is separated from the inner surface of the butterfly valve sealing surface, and media in front of and behind the valve plate are communicated, so that the butterfly valve is opened and closed. Fig. 4 is a cross-sectional view of the extruded pin connection pin body of the present application. FIG. 5 is a top view of the extruded pin connection pin body of the present application;
as shown in fig. 1-5, the application provides an extrusion formula round pin formula coupling assembling, constitute including round pin body 1, valve rod 2, valve plate 3, fixed pin 4 and fastening screw 5, valve rod 2 is cylindrical axis body, is equipped with the U-shaped groove on the axis body. The valve plate 3 is the disc, and its back is equipped with the boss, is equipped with the round hole in the boss, and the shaft body of valve rod 2 assembles in the round hole of valve plate 3. The pin body 1 is a combination body with a wedge-shaped key and a rectangular table, the bottom surface of the pin body 1 is tightly attached to the back surface of the valve plate 3, the wedge-shaped key is tightly assembled in a U-shaped groove of the valve rod 2, and the rectangular table is provided with a pin hole and a screw hole and is fastened on the valve plate 3 through a fixing pin and a fastening screw;
as shown in fig. 4 and 5, the pin body 1 is a combination body with a wedge key and a rectangular platform 12, and it can be understood that the pin body comprises the wedge key and the rectangular platform, and the wedge key and the rectangular platform are an integral component. The rectangular table is provided with small and large holes, the corresponding small holes in the figures 4 and 5 are pin holes, and the large holes are screw holes. Wherein, the diameter of valve plate 3 is D, the diameter of valve rod 2 is D, length is L, the length of rectangle platform is A, the cross section of rectangle platform is square, the length of side of square is B, the contact surface of wedge key and valve rod 2Product S and elastic modulus E of the material of the valve rod 21Poisson's ratio of V1The modulus of elasticity of the wedge bond material is E2Poisson's ratio of V2The wedge angle of the wedge key is theta, and the theta meets the following conditions:
；
fig. 6 and 7 are front and cross-sectional views, respectively, of an extruded pin-type connection valve stem of the present application. Fig. 6 and 7 clearly show the outline of the valve rod 2, that is, the valve rod 2 is a cylindrical shaft body, and a U-shaped groove is formed on the shaft body. In fig. 6, a U-shaped groove formed in the shaft body is shown in the lower middle part of the valve rod 2;
fig. 8, 9 and 10 respectively illustrate a valve plate in the squeeze pin connection assembly of the present application from different perspectives;
fig. 11 is a partial structural view of the installation of the extrusion pin type connecting pin body of the present application. As can be seen from fig. 11, the disc-shaped valve plate 3 is provided with a circular hole, and the valve plate 3 may be disc-shaped or may be designed as another plate surface having a circular arc as necessary. The back of the valve plate 3 is provided with a boss. The boss is provided with a round hole;
the pin body 1 consists of a wedge-shaped key and a rectangular table, and the wedge-shaped key and the rectangular table are integrated components. The shaft body of the valve rod 2 is assembled in the round hole of the valve plate 3. The pin body 1 is a combination body with a wedge-shaped key and a rectangular table, the bottom surface of the pin body 1 is tightly attached to the back surface of the valve plate 3, the wedge-shaped key is tightly assembled in a U-shaped groove of the valve rod 2, and the rectangular table is provided with a pin hole and a screw hole and is fastened on the valve plate 3 through a fixing pin and a fastening screw;
the application also provides a liquid oxygen butterfly valve, at least comprises a driving device and a connecting assembly. The butterfly valve adopts an extrusion pin type connecting component. The driving device in the liquid oxygen butterfly valve is connected with the head of the valve rod 2 and drives the valve rod 3 to do 90-degree rotary motion. The valve rod 2 transmits the rotating force to the valve plate 3 through the pin body 1, so that the outer circle surface of the valve plate 3 is in close contact with or separated from the inner surface of a butterfly valve sealing ring, medium sealing or circulation is realized, and the purpose of opening and closing the valve is achieved. The utility model discloses creatively designs out extrusion formula round pin formula coupling assembling to in being applied to liquid rocket engine oxidant supply system's butterfly valve with it, change extrusion formula round pin connection into extrusion formula round pin connection, make the round pin body change into the extrusion force of bearing completely by original shear stress bearing completely in the transmission process of power, the atress nature takes place the matter and becomes, has improved the stress state of round pin body. The extrusion type pin type component is made of a material with a certain elastic modulus, and when the butterfly valve is closed, the outer circle surface of the valve plate 3 is in close contact with the inner surface of a butterfly valve sealing ring, so that the problem that the butterfly valve cannot work due to connection failure caused by material cold shrinkage deformation under a low-temperature working condition is solved;
practice proves that when the extrusion type pin type connecting assembly is applied, the stress state of a pin body is improved, the opening and closing performance of a butterfly valve is safe and reliable under the low-temperature working condition, and the working stability of a liquid rocket engine is ensured;
the above description is only a specific embodiment of the present invention, but the protection of the present invention is not limited thereto, and those skilled in the art can make any improvement without substantial change without changing the principle, and the application of the improvement in the technical field of propellant gas generators of liquid rocket engines should be regarded as the protection scope of the present invention;
details not described in the present specification belong to the prior art known to those skilled in the art.
Claims (7)
1. An extrusion type pin connecting assembly is used in a liquid oxygen butterfly valve of a power oxidant supply system of a liquid rocket engine, and is characterized by comprising a pin body (1), a valve rod (2), a valve plate (3), a fixing pin (4) and a fastening screw (5); the valve rod (2) is a cylindrical shaft body, and a U-shaped groove is formed in the shaft body; the valve plate (3) is disc-shaped, a boss is arranged on the back of the valve plate (3), a round hole is formed in the boss, and a shaft body of the valve rod (2) is assembled in the round hole of the valve plate (3).
2. The squeeze pin connection assembly according to claim 1, characterized in that the pin body (1) comprises a wedge key and a rectangular table, and the wedge key and the rectangular table are of a unitary structure.
3. The squeeze pin connection assembly according to claim 2, characterized in that the bottom surface of the pin body (1) is closely attached to the back surface of the valve plate (3), and the wedge key portion is tightly fitted in the U-shaped groove on the valve stem (2).
4. The squeeze pin connection assembly of claim 2, wherein the rectangular table defines a pin hole for receiving a fixing pin and a screw hole for receiving a fastening screw; and the rectangular table is fastened on the valve plate (3) through the fixing pin and the fastening screw.
5. The squeeze pin connection assembly of claim 4, wherein the bore diameter of the pin bore is smaller than the bore diameter of the screw bore.
6. A liquid oxygen butterfly valve comprising a drive means and a connection assembly, wherein the connection assembly is a squeeze-type pin connection assembly according to any one of claims 1 to 5.
7. The liquid oxygen butterfly valve of claim 6, wherein the driving device is connected to the connecting assembly and drives the valve rod of the connecting assembly to perform 90 ° rotation, and the valve rod converts the rotation force into a pressing force through the pin body and transmits the pressing force to the valve plate, so that the valve plate rotates 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022624225.8U CN214146623U (en) | 2020-11-13 | 2020-11-13 | Extrusion formula round pin formula coupling assembling and liquid oxygen butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022624225.8U CN214146623U (en) | 2020-11-13 | 2020-11-13 | Extrusion formula round pin formula coupling assembling and liquid oxygen butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214146623U true CN214146623U (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022624225.8U Active CN214146623U (en) | 2020-11-13 | 2020-11-13 | Extrusion formula round pin formula coupling assembling and liquid oxygen butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214146623U (en) |
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- 2020-11-13 CN CN202022624225.8U patent/CN214146623U/en active Active
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