CN213776412U - Sealing member and rocket valve structure - Google Patents
Sealing member and rocket valve structure Download PDFInfo
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- CN213776412U CN213776412U CN202022007463.4U CN202022007463U CN213776412U CN 213776412 U CN213776412 U CN 213776412U CN 202022007463 U CN202022007463 U CN 202022007463U CN 213776412 U CN213776412 U CN 213776412U
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Abstract
The utility model provides a sealing member and rocket valve structure for liquid rocket valve body internal seal contains sealed main part, the one end of sealed main part is used for following thrust subassembly circumference surface cup joint in thrust subassembly, the other end be used for with rocket valve body inner wall butt. The sealing body comprises a fixing part with an opening and an extending part extending outwards along the fixing part, the sealing body is sleeved on the thrust assembly through the opening, and the side, far away from the fixing part, of the extending part is used for being abutted against the inner wall of the valve body so as to prevent leakage of the switch control gas. Compared with the prior art, the sealing element can improve the sealing effect of the valve and reduce the loss of liquid medium, thereby improving the working reliability and efficiency of the rocket valve structure.
Description
Technical Field
The utility model relates to a appearance accuse driving system valve technical field especially relates to a sealing member and rocket valve structure.
Background
With the rapid development of the aerospace industry, all the technologies related to the rocket field also realize the rapid advance. The valve is an important part for realizing the starting and shutdown of the liquid rocket engine. The medium of the low-temperature liquid rocket engine is an ultralow-temperature propellant, the medium temperature range is usually about 20K-120K, and the pressure is more than 10 MPa. The valve operating gas is usually a high-pressure gas having a pressure of about 20 MPa.
Liquid propellant used by the existing domestic active low-temperature liquid rocket engine adopts liquid methane as propellant besides liquid hydrogen, liquid oxygen and the like. The valve is usually opened and closed by moving an internal valve, and the valve can be in direct contact with the inner wall of the valve during the movement. For tight sealing, a dynamic sealing element is usually required between the valve and the inner wall of the valve, and may be realized by using a metal bellows or a noble metal-coated sealing ring, for example. The valve is actuated by using high-pressure helium gas, and the valve needs to be kept in a control gas state after being actuated in place. However, the large-size metal corrugated pipe is difficult to form, long in production period, large in space structure, high in purchasing cost, low in service life, poor in reliability and the like.
It is desirable to provide a sealing element suitable for low temperature environment, which can improve the sealing effect of the valve and reduce the loss of the medium.
Disclosure of Invention
An object of the utility model is to overcome prior art not enough, provide a sealing member and rocket valve structure. The sealing element can improve the sealing effect of the valve and reduce the loss of liquid medium, thereby improving the working reliability and efficiency of the rocket valve structure.
An aspect of the utility model provides a sealing member for liquid rocket valve body internal seal contains sealed main part, the one end of sealed main part is used for following thrust subassembly circumference surface cup joint in thrust subassembly, the other end be used for with rocket valve body inner wall butt. The sealing body comprises a fixing part with an opening and an extending part extending outwards along the fixing part, the sealing body is sleeved on the thrust assembly through the opening, and the side, far away from the fixing part, of the extending part is used for being abutted against the inner wall of the valve body so as to prevent leakage of the switch control gas.
In one embodiment, the thickness of the extension portion gradually becomes smaller in a direction from the fixing portion to the extension portion.
In the same embodiment, the included angle between the extension part and the fixing part is A, wherein A is more than or equal to 30 degrees and less than or equal to 80 degrees.
In one embodiment, the fixing portion has a cylindrical shape.
In the same embodiment, the extension part is provided with an excessive camber which is a structure formed by sinking from the inner cambered surface to the outer cambered surface.
In one embodiment, the fixing portion and the extending portion are integrally formed or are separate components.
In the same embodiment, the extending part is used for being provided with a plurality of hemispheroids which are uniformly distributed on one end surface abutting against the inner wall of the valve body, and the hemispheroids and the connecting end of the extending part are integrally formed.
In the same embodiment, the surface of the curved end of the hemisphere is provided with a colloid sleeve, one side surface of the colloid sleeve is connected with the hemisphere by adopting an adhesive, and the other side surface of the colloid sleeve is used for being abutted against the inner wall of the valve body.
In one embodiment, the sealing body is made of a metal material.
Another aspect of the present invention provides a rocket valve structure, comprising a sealing member as described above.
The embodiment of the utility model provides a sealing member and rocket valve structure, sealing member are used for liquid rocket valve body internal seal, contain sealed main part, the one end of sealed main part is used for following thrust subassembly circumference surface cup joint in thrust subassembly, the other end be used for with rocket valve body inner wall butt. The sealing main body comprises a fixing part with an opening and an extending part extending outwards along the fixing part, the sealing main body is sleeved on the thrust assembly through the opening, the side, far away from the extending part, of the fixing part is used for being abutted to the inner wall of the valve body to seal the inner wall of the valve body, and therefore the leakage of the switch control gas is prevented due to the fact that the gap between the inner wall of the valve body and the extending part is leaked. Whole structural design is reasonable, improves the leakproofness, reduces liquid medium's loss, and the processing of being convenient for can practice thrift the cost thereby improves rocket valve structure operational reliability and efficiency.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification of the invention, illustrate exemplary embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view of a sealing member and a valve body in an embodiment of the present invention;
fig. 2 is a perspective view of a sealing member in an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a sealing member according to an embodiment of the present invention;
fig. 4 is a schematic view of the connection of the partial extension part, the hemisphere and the colloid sleeve in the embodiment of the present invention.
Description of reference numerals:
3 fixed part 4 extension part
5 open pore 6 hemisphere
7 excessive camber 8 colloid sleeve
9 valve body
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, which should not be considered limiting of the invention, but rather should be understood to be a more detailed description of certain aspects, features and embodiments of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.
One aspect of the present invention provides a sealing member for sealing inside a liquid rocket valve body. As shown in fig. 1, 2 and 3, the rocket valve comprises a sealing body 2, one end of the sealing body 2 is used for sleeving the thrust assembly 1 (for example, a thrust rod) along the circumferential surface of the thrust assembly 1, and the other end is used for abutting against the inner wall of the rocket valve body 9. The sealing body 2 comprises a fixing part 3 with an opening 5 and an extension part 4 extending outwards along the fixing part 3, the sealing body is sleeved on the thrust assembly 1 through the opening 5, and the side, far away from the fixing part 3, of the extension part 4 is used for being abutted against the inner wall of the valve body 9 so as to prevent the leakage of the switch control gas.
Specifically, the embodiment of the utility model provides a sealing member and rocket valve structure, sealing member are used for liquid rocket valve body internal seal, contain sealed main part 2, and sealed main part 2's one end is used for cup jointing in thrust subassembly 1 along 1 circumference surface of thrust subassembly, the other end be used for with 9 inner walls butts of rocket valve body. Sealing body 2 comprises fixed part 3 that has trompil 5 and extension 4 along the outside extension of fixed part 3, and sealing body 2 cup joints at thrust unit 1 through trompil 5, and extension 4 keep away from fixed part 3 side be used for with the sealed of 9 inner walls of valve body butt of valve body for realizing 9 inner walls to prevent that the gap leakage of valve body 9 inner walls and extension is followed to switching control gas, and then prevent that the switching control gas from leaking.
The whole structure is reasonable in design, the sealing performance of the valve body can be improved, the loss of liquid media is reduced (the switch control gas is used for opening/closing the valve body to control the circulation and closing of the media in the valve body 9), the processing is convenient, the cost can be saved, the performance of the attitude and orbit control power engine is further improved, and the working reliability and the working efficiency of the attitude and orbit control power engine are improved.
It should be noted that, because the surface of the sealing element bears high pressure during the process of the high-pressure medium (the gas medium for controlling the opening of the valve) entering the valve body 9, in order to ensure the flexibility of the extending portion and the tight connection with the inner wall of the valve body 9, for example, the thickness of the extending portion 4 in the direction from the fixing portion 3 to the extending portion 4 gradually decreases uniformly. On the one hand, in the bending process when the extension part 4 bears high pressure, one end of the extension part 4 is extruded with the connecting end of the inner wall of the valve body 9, so that the gap between the extension part 4 and the inner wall of the valve body 9 is reduced, and further the medium is reduced to flow out from the gap. On the other hand, since the thickness of the extension portion 4 is gradually reduced in the direction from the fixing portion 3 toward the extension portion 4, the weight of the entire seal is reduced, and the entire weight of the valve body 9 is reduced, thereby achieving weight reduction of the valve body.
It should be noted that, in order to ensure the uniform stress of the extension portion 4 and the stable structure, the extension portion 4 is closely attached to the inner wall of the valve body 9, for example, the included angle between the extension portion 4 and the fixing portion 3 is a. For example, a can be 35 °, 40 °, 55 °, and a large number of experiments show that when a is greater than or equal to 30 ° and less than or equal to 80 °, a gap between the extension portion 4 and the inner wall of the valve body 9 is smaller when being extruded by a high-pressure medium, so that the medium flows out from the gap, thereby reducing the waste of the medium, and the medium can be in full contact with the extension portion, thereby rapidly completing the opening/closing of the valve body 9.
What need be said in particular is that, in order to guarantee fixed part 3 stable in structure, for example, the appearance of fixed part 3 is the cylinder structure, can make things convenient for fixed part 3 to be connected with thrust subassembly 1, guarantees that the fixed part atress is even, and then is favorable to the inside sealed of valve body.
It is noted that in order to allow the high pressure medium to quickly push the seal to move and at the same time to allow the extension 4 of the seal to be tightly connected to the inner wall of the valve body 9, for example, the extension 4 is provided with an excessive camber 7. The excessive camber 7 is a structure formed by recessing from the inner camber surface toward the outer camber surface of the excessive camber 7. When high pressure is applied to the extension part 4 by gas medium, the contact area (increased by pressure) between the excessive arc 7 and the high-pressure medium is increased by the existence of the excessive arc 7 on the extension part 4, so that the sealing element is pushed to move quickly, the tight abutting between the inner wall of the valve body 9 and the extension part 4 is facilitated, and the sealing between the excessive arc 7 and the extension part 4 is improved.
In the present embodiment, the fixing portion 3 and the extending portion 4 are independent members, and they are connected by welding. In practical application, in order to connect the fixing portion 3 and the extending portion 4 tightly, the fixing is firm, for example, the fixing portion and the extending portion may be integrally formed.
As shown in fig. 1, 2 and 4, in order to form a plurality of seals between the extension portion 4 and the inner wall of the valve body 9, and simultaneously avoid the extension portion 4 from scratching the inner wall of the valve body 9 in the using process, for example, when the extension portion 4 contacts the inner wall of the valve body 9, a plurality of hemispheroids 6 which are uniformly arranged are arranged on one end surface of the extension portion 4, which is used for being abutted against the inner wall of the valve body 9, so that a plurality of seals (each top is abutted against the inner wall of the valve body to form one seal) are formed between the end surfaces of the hemispheroids 6 which are sequentially arranged and the inner wall of the valve body 9, thereby remarkably improving the sealing effect. The hemispheres 6 are illustrated as two, and in the practical application process, the number of the hemispheres 6 can be increased according to the requirement, and the process is not illustrated. In the present embodiment, the hemisphere 6 is integrally formed with the extended portion 4 connection end.
In addition, in order to ensure that the hemisphere 6 is in direct contact with the inner wall of the valve body 9 to cause breakage of the hemisphere 6 and to improve the seal between the extension portion 4 and the inner wall of the valve body 9, for example, the curved end surface of the hemisphere 6 is provided with a rubber boot 8. In order to make the connection between the colloid sleeve 8 and the hemisphere 6 tight and the fixation firm, for example, one side surface of the colloid sleeve 8 is connected with the hemisphere 6 by using an adhesive, and the other side surface is used for abutting against the inner wall of the valve body 9.
Furthermore, the sealing body 2 may be a sealing plate having a self-tightening functional structure under high pressure. For example, the sealing body 2 may be made of a metal material or a non-metal material, and may be used for special conditions such as low temperature and high pressure, or high temperature and high pressure.
The self-tightening seal of the valve of the present application is described below by taking the seal body 2 as an example, specifically as follows:
the sealing body is arranged on the thrust assembly 1, the sealing body 2 is pressed to generate initial sealing force of a sealing surface during installation, and the extension part 4 deforms to enable the sealing surface to be tightly attached to the inner wall of the valve body 9 so as to form sealing. After the pressure of the sealing medium rises (the inner wall of the valve body 9 is ventilated, gas enters from the valve body 9, and pressure is applied to one side of the extension part 4 close to the gas inlet end), the pressure borne by the extension part 4 is increased, namely, the deformation of the extension part 4 (the connecting end of the extension part 4 and the inner wall of the valve body 9) is increased, and the connecting part of the extension part 4 and the inner wall of the valve body 9 is tighter. Therefore, the sealing main body 2 of the valve has the advantage that the higher the medium pressure is, the better the sealing effect is, within the allowable sealing pressure range. I.e. the sealing body has a self-tightening effect within a certain pressure range.
The above embodiments may be combined with each other with corresponding technical effects.
Another aspect of the present invention provides a rocket valve structure, including the above sealing member.
The foregoing is only an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principles of the present invention should fall within the protection scope of the present invention.
Claims (10)
1. A sealing member for sealing the interior of a liquid rocket valve body is characterized in that: comprises a sealing main body, one end of the sealing main body is used for being sleeved on the thrust assembly along the circumferential surface of the thrust assembly, the other end of the sealing main body is used for being abutted against the inner wall of the rocket valve body,
the sealing main body comprises a fixing part with an opening and an extending part extending outwards along the fixing part, the sealing main body is sleeved on the thrust assembly through the opening, and the side, far away from the fixing part, of the extending part is used for being abutted against the inner wall of the valve body so as to prevent leakage of switch control gas.
2. The seal of claim 1, wherein: the thickness of the extension part is gradually and uniformly reduced in the direction from the fixing part to the extension part.
3. The seal of claim 1, wherein: the included angle between the extension part and the fixing part is A, wherein A is more than or equal to 30 degrees and less than or equal to 80 degrees.
4. The seal of claim 3, wherein: the fixed part is of a cylindrical structure.
5. The seal of claim 3, wherein: the extension part is provided with an excessive camber which is a structure formed by the inward cambered surface and the outward cambered surface which are concave downwards.
6. The seal of claim 1, wherein: the fixing part and the extending part are integrally formed or are mutually independent parts.
7. The seal of claim 1, wherein: the extension part is used for being provided with a plurality of hemispheroids which are uniformly distributed on one end surface abutted to the inner wall of the valve body, and the hemispheroids and the extension part connecting end are integrally formed.
8. The seal of claim 7, wherein: the surface of the bent end of the hemisphere is provided with a colloid sleeve, one side surface of the colloid sleeve is connected with the hemisphere through a bonding agent, and the other side surface of the colloid sleeve is used for being abutted against the inner wall of the valve body.
9. The seal of claim 1, wherein: the sealing body is made of metal.
10. A rocket valve structure, characterized by: a seal comprising a seal according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022007463.4U CN213776412U (en) | 2020-09-15 | 2020-09-15 | Sealing member and rocket valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022007463.4U CN213776412U (en) | 2020-09-15 | 2020-09-15 | Sealing member and rocket valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213776412U true CN213776412U (en) | 2021-07-23 |
Family
ID=76905611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022007463.4U Active CN213776412U (en) | 2020-09-15 | 2020-09-15 | Sealing member and rocket valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213776412U (en) |
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2020
- 2020-09-15 CN CN202022007463.4U patent/CN213776412U/en active Active
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