CN115217975A - Sealing device for converting axial force into radial extrusion fitting force - Google Patents
Sealing device for converting axial force into radial extrusion fitting force Download PDFInfo
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- CN115217975A CN115217975A CN202210867678.4A CN202210867678A CN115217975A CN 115217975 A CN115217975 A CN 115217975A CN 202210867678 A CN202210867678 A CN 202210867678A CN 115217975 A CN115217975 A CN 115217975A
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- 238000007789 sealing Methods 0.000 title claims abstract description 163
- 238000001125 extrusion Methods 0.000 title claims abstract description 27
- 238000005260 corrosion Methods 0.000 claims abstract description 79
- 230000007797 corrosion Effects 0.000 claims abstract description 78
- 238000005474 detonation Methods 0.000 claims abstract description 34
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 29
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 25
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000002360 explosive Substances 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
Abstract
The invention discloses a sealing device for converting axial force into radial extrusion fitting force, wherein a continuous pressure output part is positioned at the upper end of a corrosion-resistant sealing ring, a fourth circular table surface of the continuous pressure output part is contacted with the inner side of the upper end of a third circular ring body of the corrosion-resistant sealing ring, the lower end surface of a fourth concentric circular plate of the continuous pressure output part is contacted with a first upper end concentric circular plane of a part to be sealed with an inner cylindrical surface, and the fourth concentric circular plate of the continuous pressure output part is connected with the first circular plate of the part to be sealed with the inner cylindrical surface through a fourth screw; the end part of the through cable pipe adopted by the invention is a conical surface and the diameter is reduced, when the circular-section polytetrafluoroethylene sealing ring is installed, the diameter does not need to be enlarged, the circular-section polytetrafluoroethylene sealing ring generates radial expansion under the axial extrusion action of the upper conical surface and the lower conical surface, and simultaneously is extruded and attached to the end cover of the warhead and the through cable pipe, so that the sealing is realized, and the power of the body detonation warhead is ensured to be exerted reliably.
Description
Technical Field
The invention belongs to the technical field of sealing devices, relates to a radial extrusion sealing device, and particularly relates to a sealing device for converting axial force into radial extrusion fit force.
Background
The body detonation warhead is internally filled with high-energy fuel, the high-energy fuel is thrown into the air under the action of explosive detonation throwing driving action, the high-energy fuel is mixed with the air to form a large-range active cloud cluster, and the active cloud cluster generates body detonation and releases strong shock waves after secondary detonation of the explosive, so that the body detonation warhead is one of weapons with the greatest power.
The high-energy fuel filled in the body detonation warhead part contains liquid-phase materials, so that all parts in the body detonation warhead part, which are contacted with the high-energy fuel, need to have sealing performance, and mechanical interfaces of a shell, front and rear end covers, a loading port, a cable-passing line pipe, a throwing powder pipe and the like of the body detonation warhead part need to meet the sealing requirements.
The high-energy liquid-phase fuel filled in the body detonation warhead has strong corrosivity, and various rubber materials are subjected to chemical reaction with the high-energy liquid-phase fuel to lose effectiveness. When the body detonation warhead is applied to a weapon platform, the storage condition of at least ten years needs to be met. In the long-term storage process, the rubber sealing element is aged because of the chemical reaction with the high-energy liquid-phase fuel, the reacted rubber loses resilience and does not play a sealing role any more, and once the body detonation warhead is leaked, the warhead is caused to lose effectiveness, and meanwhile, a major accident is caused.
The effect of stretching treatment on the properties of polytetrafluoroethylene reported by ssdona et al in the literature (journal of aeronautical materials, 12 months 2013, volume 33, page 6, 57): the polytetrafluoroethylene is a high polymer material with excellent comprehensive performance, and has excellent high and low temperature resistance and chemical corrosion resistance. A project team performs a compatibility experiment of the polytetrafluoroethylene and the high-energy liquid-phase fuel, and finds that the polytetrafluoroethylene material does not chemically react with the high-energy liquid-phase fuel, the polytetrafluoroethylene material meets the compatibility with the high-energy liquid-phase fuel, and a sealing ring made of the polytetrafluoroethylene material can be used for a long time on a body detonation warhead and has long-term storage conditions.
The compressibility of ptfe is very important as a material for a seal ring, but ptfe is very poorly compressible, and ptfe has an elastic modulus of 280MPa, a tensile strength of 15MPa, and a tensile strength of only 5.3% of the elastic modulus, i.e., when the amount of deformation of the ptfe material exceeds 5.3%, deformation and breakage occur.
The cable-through line pipe of the body detonation warhead is in fit contact with the end cover of the warhead through the radial cylindrical surface, and the cylindrical surface contact part of the two parts needs to be sealed. Xujinpeng et al reported a radial sealing structure in the literature "analysis of causes of leakage problems of O-shaped rubber sealing rings and preventive measures" (2013, 677 th 11 th stage, in the rubber industry), and is suitable for sealing shaft hole parts with cylindrical contact surfaces, wherein an annular groove is machined in a shaft part or a hole part, and a sealing ring is installed in the annular groove and is in pressing contact with the shaft part and the hole part simultaneously after being radially pressed, so that sealing is achieved.
However, the polytetrafluoroethylene sealing ring arranged in the radial sealing structure has the following problems: the sealing ring is arranged in the annular groove of the radial sealing structure, the diameter of the sealing ring needs to be enlarged firstly, and the sealing ring is arranged in the annular groove and then naturally restored to the original size by the elasticity of the sealing ring. However, the polytetrafluoroethylene has poor compressibility, the polytetrafluoroethylene sealing ring is very difficult to expand in diameter, if the diameter of the polytetrafluoroethylene sealing ring is forcibly expanded, the polytetrafluoroethylene sealing ring is subjected to permanent deformation and damage, and the diameter cannot be restored to the original size, so that the polytetrafluoroethylene sealing ring in the radial sealing structure cannot be installed.
Disclosure of Invention
In order to overcome the defects or shortcomings of the prior art, the invention aims to provide a sealing device which converts axial force into radial extrusion fit force.
In order to realize the task, the invention adopts the following technical solution:
a sealing device for converting axial force into radial extrusion fitting force comprises an inner cylindrical surface sealed part and an outer conical surface sealed part, wherein the inner cylindrical surface sealed part is an end cover of a body detonation warhead, and the outer conical surface sealed part is a cable penetrating conduit of the body detonation warhead; the device also comprises a corrosion-resistant sealing ring 3 and a continuous pressure output part;
the part to be sealed with the inner cylindrical surface is in a first circular plate shape, the first circular plate is provided with a first circular hole, and the central axis of the first circular hole is vertical to the ground; the inner side surface of the first round hole is a first inner cylindrical surface, and the upper end surface of the first round plate is a first upper end concentric circle plane;
the part to be sealed with the outer conical surface is in a second round pipe, the second round pipe is a revolving body, the upper end of the outer side surface of the second round pipe is a second upper end cylindrical surface, the middle part of the outer side surface of the second round pipe is a second round table surface, the lower end of the outer side surface of the second round pipe is a second lower end cylindrical surface, the diameter of the second lower end cylindrical surface is larger than that of the second upper end cylindrical surface, a second annular groove is formed in the upper end of the second lower end cylindrical surface, and the axial section of the second annular groove of the part to be sealed with the outer conical surface is in a V shape;
the axis of the revolving body of the part to be sealed 2 with the outer conical surface is superposed with the central axis of the first round hole of the part to be sealed 1 with the inner cylindrical surface, and the second round table surface and the second upper end cylindrical surface of the part to be sealed with the outer conical surface are positioned at the inner side of the first round hole of the part to be sealed with the inner cylindrical surface and are used for sealing an annular gap between the first inner cylindrical surface of the part to be sealed with the inner cylindrical surface and the second round table surface of the part to be sealed with the outer conical surface;
the corrosion-resistant sealing ring is a third circular ring body, the third circular ring body is a revolving body, the axial section of the third circular ring body is circular, and the third circular ring body is made of polytetrafluoroethylene;
the axis of a revolving body of the corrosion-resistant sealing ring is superposed with the axis of a revolving body of the part to be sealed with the outer conical surface, the corrosion-resistant sealing ring is positioned on the inner side of a first inner cylindrical surface of the part to be sealed with the inner cylindrical surface, and the corrosion-resistant sealing ring is positioned on the outer side of a second circular table surface of the part 2 to be sealed with the outer conical surface;
the continuous pressure output part is a revolving body which consists of an upper part, a middle part and a lower part, wherein the upper part is a fourth concentric circular plate, the shaft section of the middle part is V-shaped, the wall thickness of the V-shaped part is 6mm, the included angle of two sides of the V-shaped part is 15-21 degrees, the V-shaped opening of the shaft section of the middle part faces away from the axis of the revolving body of the continuous pressure output part, the shaft section of the lower part is a right trapezoid, the inclined side of the right trapezoid is positioned at the lowest end, and the lower end face of the lower part is a fourth circular table surface;
the revolving body axis of the continuous pressure output part coincides with the revolving body axis of the corrosion-resistant sealing ring, the continuous pressure output part is located at the upper end of the corrosion-resistant sealing ring, a fourth circular table surface of the continuous pressure output part is contacted with the inner side of the upper end of a third circular ring body of the corrosion-resistant sealing ring, the lower end surface of a fourth concentric circular plate of the continuous pressure output part is contacted with a first upper end concentric circular plane of the sealed part with the inner cylindrical surface, and the fourth concentric circular plate of the continuous pressure output part 4 is connected with the first circular plate of the sealed part with the inner cylindrical surface through a fourth screw.
Regarding the V-shaped included angle of the axial section of the second annular groove of the part 2 with the external conical surface to be sealed, any one of the following 2 ways can be adopted:
implementation mode 1: the axial section of the second annular groove of the part 2 with the outer conical surface to be sealed is V-shaped, and the included angle of two sides is 15 degrees.
Implementation mode 2: the axial section of the second annular groove of the part 2 with the outer conical surface to be sealed is V-shaped, and the included angle of two sides is 21 degrees.
The application method of the sealing device for converting the axial force into the radial extrusion fitting force is characterized by comprising the following steps of:
step 1: assembling the part to be sealed with the inner cylindrical surface and the part to be sealed with the outer conical surface;
step 2: assembling the corrosion-resistant sealing ring and the part to be sealed with the outer conical surface;
and step 3: assembling a continuous pressure output part and a part to be sealed with an inner cylindrical surface;
and 4, step 4: the fourth screw is screwed down, so that the continuous pressure output part moves downwards, the corrosion-resistant sealing ring is extruded by the fourth circular table surface of the continuous pressure output part, the continuous pressure output part gives downward axial force to the corrosion-resistant sealing ring, the wall thickness of the V-shaped middle part of the continuous pressure output part is 6mm, the lower end of the corrosion-resistant sealing ring is supported by the second circular table surface of the part with the outer circular cone surface and gives upward axial force to the corrosion-resistant sealing ring, the continuous pressure output part extrudes the inner side of the upper end of the corrosion-resistant sealing ring, the lower end of the part with the outer circular cone surface is pressurized by the sealing part, the component forces of the upper axial force and the lower axial force borne by the corrosion-resistant sealing ring in the vertical direction are equal and opposite in direction, the component forces of the upper axial force and the lower axial force borne by the corrosion-resistant sealing ring in the horizontal direction make the corrosion-resistant sealing ring move in the direction of increasing the diameter, the outer side of the corrosion-resistant sealing ring is in pressing contact with the first inner circular cylinder surface of the sealing part, the mutual attachment is realized, and the sealing is realized, and the annular gap between the first inner circular cylinder surface of the inner cylinder surface of the part with the outer circular cone surface of the sealing ring.
The sealing device for converting the axial force into the radial extrusion fit force has the following technical effects:
the end part of the adopted through cable pipe is conical and has reduced diameter, the diameter of the circular section polytetrafluoroethylene sealing ring does not need to be enlarged when the circular section polytetrafluoroethylene sealing ring is installed, the circular section polytetrafluoroethylene sealing ring generates radial expansion under the axial extrusion action of the upper conical surface and the lower conical surface, and simultaneously is extruded and attached with the end cover of the warhead and the through cable pipe, so that sealing is realized, and the power of the body detonation warhead is ensured to be reliably exerted.
Drawings
Fig. 1 is a schematic structural view of a sealing device of the present invention that converts an axial force into a radial pressing fit force. The symbols in the figures represent: 1. the device comprises an inner cylindrical surface sealed part, an outer conical surface sealed part, an anti-corrosion sealing ring and a continuous pressure output part, wherein the outer conical surface sealed part is 2, and the continuous pressure output part is 4.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Detailed Description
The following embodiments are preferred examples. The invention is not limited to the following specific examples, and all additions and equivalent changes based on the technical scheme of the invention shall fall within the protection scope of the invention.
Example 1:
as shown in fig. 1, the present embodiment provides a sealing device for converting an axial force into a radial extrusion fitting force, which includes a sealed part 1 with an inner cylindrical surface, a sealed part 2 with an outer conical surface, a corrosion-resistant sealing ring 3, and a continuous pressure output part 4;
the internal cylindrical surface sealed part 1 is an end cover of the body detonation warhead, and the external conical surface sealed part 2 is a cable-passing conduit of the body detonation warhead;
the part 1 to be sealed with the inner cylindrical surface is in a first circular plate shape, a first circular hole is formed in the first circular plate, and the central axis of the first circular hole is perpendicular to the ground; the inner side surface of the first round hole is a first inner cylindrical surface; the upper end surface of the first circular plate is a first upper end concentric circle plane;
the part 2 with the outer conical surface to be sealed is in a second round pipe, the second round pipe is a revolving body, the upper end of the outer side surface of the second round pipe is a second upper end cylindrical surface, the middle part of the outer side surface of the second round pipe is a second round table surface, the lower end of the outer side surface of the second round pipe is a second lower end cylindrical surface, and the diameter of the second lower end cylindrical surface is larger than that of the second upper end cylindrical surface; the upper end of the cylindrical surface of the second lower end is provided with a second annular groove, and the axial section of the second annular groove is V-shaped;
the axis of the revolving body of the sealed part 2 with the outer conical surface is superposed with the central axis of the first round hole of the sealed part 1 with the inner cylindrical surface, and the second round table surface and the second upper end cylindrical surface of the sealed part 2 with the outer conical surface are positioned at the inner side of the first round hole of the sealed part 1 with the inner cylindrical surface and are used for sealing the annular gap between the first inner cylindrical surface of the sealed part 1 with the inner cylindrical surface and the second round table surface of the sealed part 2 with the outer conical surface;
the corrosion-resistant sealing ring 3 is a third circular ring body and is a revolving body, the axial section of the revolving body is circular, and the material is polytetrafluoroethylene;
the axis of a revolving body of the corrosion-resistant sealing ring 3 is superposed with the axis of a revolving body of the part to be sealed 2 with the outer conical surface, the corrosion-resistant sealing ring 3 is positioned on the inner side of a first inner cylindrical surface of the part to be sealed 1 with the inner cylindrical surface, and the corrosion-resistant sealing ring 3 is positioned on the outer side of a second circular table surface of the part to be sealed 2 with the outer conical surface;
the continuous pressure output part 4 is a revolving body which consists of an upper part, a middle part and a lower part, wherein: the upper part is a fourth concentric circular plate, the shaft section of the middle part is V-shaped, and the V-shaped opening of the shaft section of the middle part is back to the axis of the revolving body of the continuous pressure output part 4; the section of the lower part shaft is a right trapezoid, the bevel edge of the right trapezoid is positioned at the lowest end, and the lower end face of the lower part is a fourth round table surface;
the revolving body axis of the continuous pressure output part 4 coincides with the revolving body axis of the corrosion-resistant sealing ring 3, the continuous pressure output part 4 is located at the upper end of the corrosion-resistant sealing ring 3, the fourth circular table surface of the continuous pressure output part 4 is in inner side contact with the upper end of the third circular ring body of the corrosion-resistant sealing ring 3, the lower end surface of the fourth concentric circular plate of the continuous pressure output part 4 is in concentric circular plane contact with the first upper end of the sealed part 1 with the inner cylindrical surface, and the fourth concentric circular plate of the continuous pressure output part 4 is connected with the first circular plate of the sealed part 1 with the inner cylindrical surface through a fourth screw.
The sealing device for converting axial force into radial extrusion fit force of the embodiment is used by the method comprising the following steps of:
step 1: assembling a part to be sealed 1 with an inner cylindrical surface and a part to be sealed 2 with an outer conical surface;
and 2, step: assembling the corrosion-resistant sealing ring 3 and the part to be sealed 2 with the outer conical surface;
and 3, step 3: assembling a continuous pressure output part 4 and a part to be sealed 1 with an inner cylindrical surface;
and 4, step 4: screwing the fourth screw down to enable the continuous pressure output part 4 to move downwards, extruding the corrosion-resistant sealing ring 3 by a fourth circular table surface of the continuous pressure output part 4, giving a downward axial force to the corrosion-resistant sealing ring 3 by the continuous pressure output part 4, enabling the wall thickness of the V-shaped middle part of the axial section of the continuous pressure output part 4 to be 6mm, supporting the lower end of the corrosion-resistant sealing ring 3 by a second circular table surface of the part 2 with the outer conical surface, giving an upward axial force to the corrosion-resistant sealing ring 3 by the part 2 with the outer conical surface, extruding the inner side of the upper end of the corrosion-resistant sealing ring 3 by the continuous pressure output part 4, the outer circular conical surface is pressurized on the inner side of the lower end of the corrosion-resistant sealing ring 3 by the sealing part 2, the vertical component forces of the upper axial force and the lower axial force on the corrosion-resistant sealing ring 3 are equal in magnitude and opposite in direction, the horizontal component forces of the upper axial force and the lower axial force on the corrosion-resistant sealing ring 3 enable the corrosion-resistant sealing ring 3 to move towards the direction of increasing the diameter, the outer side of the corrosion-resistant sealing ring 3 is in extrusion contact with the first inner circular cylindrical surface of the sealing part 1 with the inner circular cylindrical surface, the first inner circular cylindrical surface of the sealing part 1 with the inner circular conical surface is attached to the second inner circular cylindrical surface of the sealing part 2 with the outer circular conical surface, and sealing is achieved.
The working principle of the sealing device for converting axial force into radial extrusion fit force of the embodiment is as follows:
the corrosion-resistant sealing ring 3 is made of polytetrafluoroethylene and can bear the corrosivity of fuel inside a detonation warhead, but the corrosion-resistant sealing ring 3 is poor in elasticity, and in a conventional radial sealing structure, the corrosion-resistant sealing ring 3 needs to be stretched, placed into the conventional radial sealing structure and then shrunk back, but the corrosion-resistant sealing ring 3 is poor in elasticity and cannot rebound, and permanent deformation damage occurs in the stretching process. Is not suitable for this configuration.
In the embodiment, the diameter of the matched end of the shaft part and the hole part is reduced, so that the corrosion-resistant sealing ring 3 can be naturally placed without being stretched, and the stretching damage is avoided. Subsequently, the contact surface of the shaft part in contact with the corrosion-resistant sealing ring 3 is a circular table surface, the upper end of the corrosion-resistant sealing ring 3 is also in contact with one circular table surface, the corrosion-resistant sealing ring 3 is extruded by the two circular table surfaces, because the circular table surface is at an angle with the axis, the axial force is decomposed, the decomposed horizontal component force can enable the corrosion-resistant sealing ring 3 to expand outwards, the corrosion-resistant sealing ring 3 moves outwards, the outer side of the corrosion-resistant sealing ring 3 is only in contact with the inner cylindrical surface sealed part 1, after the corrosion-resistant sealing ring 3 expands outwards, the contact with the inner cylindrical surface sealed part 1 is changed into tight fit extrusion, the corrosion-resistant sealing ring 3 is attached to the inner cylindrical surface sealed part 1 and the corrosion-resistant sealing ring 3, the corrosion-resistant sealing ring 3 is also extruded to the outer cylindrical surface sealed part 2 under the action of the axial force, the corrosion-resistant sealing ring 3 is also sealed to the outer cylindrical surface sealed by the sealed part 2, and thus, the corrosion-resistant sealing ring 3 seals the gap between the inner cylindrical surface sealed part 1 and the outer cylindrical surface sealed part 2.
After the continuous pressure output part 4 is subjected to axial force given by a fourth screw, the fourth screw extrudes the upper part of the continuous pressure output part 4, the upper part of the continuous pressure output part 4 downwards transmits the force to the middle part of the continuous pressure output part 4, the V-shaped opening of the middle part of the continuous pressure output part 4 is reduced under the action of the axial force to generate elastic deformation, then the middle part of the continuous pressure output part 4 transmits the axial force to the lower part of the continuous pressure output part 4, and the lower part of the continuous pressure output part 4 extrudes the corrosion-resistant sealing ring 3.
In the present embodiment, the wall thickness of the intermediate portion axial section V shape of the continuous pressure output part 4 is designed to be 6mm because: the wall thickness is too thin, the rigidity is too poor, the force generated by large deformation is also very small, and permanent deformation and unloading are easy to occur, so that a good extrusion effect cannot be generated on the corrosion-resistant sealing ring 3, and the sealing effect is reduced. The wall thickness is too thick, and deformability is too poor, and the deflection that takes place is micro in whole use, in case the part appears a little and leaps up, becomes unable to make the effective corrosion-resistant sealing washer 3 of extrusion of continuous pressure output part 4, and then can not make corrosion-resistant sealing washer 3 realize sealed effect. Through experiments, the aim of permanent sealing can be achieved when the wall thickness of the V-shaped middle part of the axial section of the continuous pressure output part 4 is designed to be 6 mm.
The high-energy fuel is filled in the body detonation warhead part, and is thrown into the air under the explosive explosion throwing driving action, so that the high-energy fuel is mixed with the air to form a large-range active cloud cluster. And then the active cloud cluster is detonated for the second time by the explosive to generate a body detonation. When the shape of the active cloud cluster is regular, the bulk detonation power is high, and when the shape of the active cloud cluster is irregular, the bulk detonation power is low.
And because the existence of the sealed part 2 with the outer conical surface causes the annular asymmetry of the body detonation warhead, the shape of the active cloud cluster formed by scattering is influenced, and the active cloud cluster is irregular.
The inventor adopts a solution method that the influence of the sealed part 2 with the outer conical surface on the body detonation warhead is avoided as much as possible.
In this embodiment, a second annular groove is formed in the upper end of the second lower end cylindrical surface of the sealed part 2 with the outer conical surface, the axial cross section of the second annular groove of the sealed part 2 with the outer conical surface is V-shaped, when the body detonation warhead is thrown by explosive explosion, shock waves formed by explosive explosion are converged and concentrated in the V-shaped second annular groove, and finally the sealed part 2 with the outer conical surface is instantaneously fractured at the second annular groove, after fracture, the sealed part 2 with the outer conical surface is separated from the sealed part 1 with the inner cylindrical surface, so that the throwing of the body detonation warhead cannot be influenced, and the cloud cluster shape cannot be influenced.
In the experiment, the included angle between the two sides of the V-shaped axial section of the second annular groove with the outer conical surface and the sealed part 2 is too small, the opening area of the V-shaped groove is too small, the energy of explosive explosion shock waves at the V-shaped groove is too small, the outer conical surface cannot be cut off smoothly by the sealed part 2, and when the included angle between the two sides of the V-shaped axial section of the second annular groove with the outer conical surface and the sealed part 2 is too large, the included angle between the side surface of the V-shaped groove with the outer conical surface and the speed direction of the shock waves is too large, so that the shock waves are emitted after acting on the side surface of the V-shaped groove and cannot be converged, and the outer conical surface cannot be cut off smoothly by the sealed part 2.
The inventor summons collective consultation and discussion of workers with related working experience through partial theoretical calculation, decomposes the problems, independently performs experimental evaluation on each module, and performs experiments, and finally, as a result, when the axial section of the second annular groove of the sealed part 2 with the outer conical surface is V-shaped, and the included angle between two sides is 15-21 degrees, the problems can be avoided.
In the embodiment, the axial section of the second annular groove of the part 2 with the outer conical surface to be sealed is V-shaped, and the included angle between two sides is 15 degrees;
ten sealing devices of the embodiment, which convert the axial force into the radial extrusion fit force, are processed, corrosive fuel is filled according to the steps of the using method, and the sealing devices are stored for three months and are sealed well. The sealing device for converting the axial force into the radial extrusion fit force of the embodiment is proved to be reliable and effective.
The sealing device for converting the axial force into the radial extrusion fitting force of the embodiment has the following technical effects:
the end part of a part (cable conduit) to be sealed with an outer conical surface is conical and the diameter of the part is reduced, when a polytetrafluoroethylene sealing ring with a circular section is installed, the diameter of the part does not need to be enlarged, the polytetrafluoroethylene sealing ring with the circular section generates radial expansion under the axial extrusion action of the upper conical surface and the lower conical surface, and is simultaneously extruded and attached to an end cover of a body detonation warhead and the cable conduit, so that sealing is realized, and the power of the body detonation warhead is ensured to be reliably exerted.
Example 2:
example 2 differs from example 1 only in that:
in this embodiment, the axial section of the second annular groove of the part 2 with the external conical surface to be sealed is V-shaped, and the included angle between the two sides is 21 °.
Ten sealing devices for converting axial force into radial extrusion fit force, which are described in the embodiment, are processed, used according to the steps of the invention, filled with corrosive fuel, and stored for three months, and are sealed well. The sealing device for converting the axial force into the radial extrusion fit force of the embodiment is proved to be reliable and effective.
The sealing device for converting the axial force into the radial extrusion fit force of the embodiment has the following technical effects:
the end part of a part (cable conduit) to be sealed with an outer conical surface is conical and the diameter of the part is reduced, when a polytetrafluoroethylene sealing ring with a circular section is installed, the diameter of the part does not need to be enlarged, the polytetrafluoroethylene sealing ring with the circular section generates radial expansion under the axial extrusion action of the upper conical surface and the lower conical surface, and is simultaneously extruded and attached to an end cover of a body detonation warhead and the cable conduit, so that sealing is realized, and the power of the body detonation warhead is ensured to be reliably exerted.
Meanwhile, the inventor also makes corresponding experiments that the included angles of two sides of the V-shaped axial section of the second annular groove are 16 degrees, 18 degrees and 20 degrees, and the sealing requirements can be met.
Claims (4)
1. A sealing device for converting axial force into radial extrusion fitting force comprises an inner cylindrical surface sealed part (1) and an outer conical surface sealed part (2), wherein the inner cylindrical surface sealed part (1) is an end cover of a body detonation warhead, and the outer conical surface sealed part (2) is a cable penetrating conduit of the body detonation warhead; the device is characterized by also comprising a corrosion-resistant sealing ring (3) and a continuous pressure output part (4);
the part (1) with the inner cylindrical surface to be sealed is shaped as a first circular plate, a first circular hole is formed in the first circular plate, and the central axis of the first circular hole is perpendicular to the ground; the inner side surface of the first round hole is a first inner cylindrical surface, and the upper end surface of the first round plate is a first upper end concentric circle plane;
the sealed part (2) with the outer conical surface is in a second circular pipe which is a revolving body, the upper end of the outer side surface of the second circular pipe is a second upper end cylindrical surface, the middle part of the outer side surface of the second circular pipe is a second circular table surface, the lower end of the outer side surface of the second circular pipe is a second lower end cylindrical surface, the diameter of the second lower end cylindrical surface is larger than that of the second upper end cylindrical surface, a second annular groove is formed in the upper end of the second lower end cylindrical surface, and the axial section of the second annular groove is in a V shape;
the axis of the revolving body with the external conical surface sealed part (2) is superposed with the central axis of the first round hole with the internal cylindrical surface sealed part (1), and the second round table surface and the second upper end cylindrical surface of the external conical surface sealed part (2) are positioned inside the first round hole with the internal cylindrical surface sealed part (1) and used for sealing an annular gap between the first inner cylindrical surface of the internal cylindrical surface sealed part (1) and the second round table surface of the external conical surface sealed part (2);
the corrosion-resistant sealing ring (3) is a third circular ring body and is a revolving body, the axial section of the revolving body is circular, and the revolving body is made of polytetrafluoroethylene;
the axis of a revolving body of the corrosion-resistant sealing ring (3) is superposed with the axis of a revolving body of the part (2) to be sealed with the outer conical surface, the corrosion-resistant sealing ring (3) is positioned on the inner side of a first inner cylindrical surface of the part (1) to be sealed with the inner cylindrical surface, and the corrosion-resistant sealing ring (3) is positioned on the outer side of a second circular table surface of the part (2) to be sealed with the outer conical surface;
the continuous pressure output part (4) is a revolving body which consists of an upper part, a middle part and a lower part, wherein the upper part is a fourth concentric circular plate, the axial section of the middle part is V-shaped, the wall thickness of the V-shaped part is 6mm, the included angle of two sides of the V-shaped part is 15-21 degrees, and the V-shaped opening of the axial section of the middle part faces away from the revolving body axis of the continuous pressure output part (4); the lower part has a right trapezoid shaft section, the bevel edge of the right trapezoid is positioned at the lowest end, and the lower end surface of the lower part is a fourth round table surface;
the revolving body axis of the continuous pressure output part (4) coincides with the revolving body axis of the corrosion-resistant sealing ring (3), the continuous pressure output part (4) is positioned at the upper end of the corrosion-resistant sealing ring (3), the fourth circular table surface of the continuous pressure output part (4) is contacted with the inner side of the upper end of the third circular ring body of the corrosion-resistant sealing ring (3), the lower end surface of the fourth concentric circular plate of the continuous pressure output part (4) is contacted with the first upper end concentric circular plane of the inner cylindrical surface sealed part (1), and the fourth concentric circular plate of the continuous pressure output part (4) is connected with the first circular plate of the inner cylindrical surface sealed part (1) through a fourth screw.
2. A sealing device for converting axial force into radial pressing fit force according to claim 1, wherein the axial section of the second annular groove of the part (2) to be sealed with the outer conical surface is V-shaped with an included angle of 15 °.
3. A sealing device for converting axial force into radial pressing fit force according to claim 1, wherein the axial section of the second annular groove of the part (2) to be sealed with the outer conical surface is V-shaped with an included angle of 21 °.
4. A method of using a sealing device for converting an axial force into a radially compressive conforming force as claimed in any one of claims 1 to 3 comprising the steps of:
step 1: assembling the part (1) with the inner cylindrical surface to be sealed and the part (2) with the outer conical surface to be sealed;
step 2: assembling the corrosion-resistant sealing ring (3) and the part (2) to be sealed with the outer conical surface;
and step 3: assembling a continuous pressure output part (4) and a sealed part (1) with an inner cylindrical surface;
and 4, step 4: screwing a fourth screw, enabling a continuous pressure output part (4) to move downwards, enabling a fourth circular table surface of the continuous pressure output part (4) to extrude the corrosion-resistant sealing ring (3), enabling the continuous pressure output part (4) to give a downward axial force to the corrosion-resistant sealing ring (3), enabling the wall thickness of a V-shaped middle part of the continuous pressure output part (4) to be 6mm, enabling the lower end of the corrosion-resistant sealing ring (3) to be supported by the second circular table surface of the sealing part (2) with the outer circular cone surface, enabling the sealing part (2) with the outer circular cone surface to give an upward axial force to the corrosion-resistant sealing ring (3), enabling the continuous pressure output part (4) to extrude the inner side of the upper end of the corrosion-resistant sealing ring (3), enabling the outer circular cone surface to be pressed by the sealing part (2) to press the inner side of the lower end of the corrosion-resistant sealing ring (3), enabling the upper axial force and the lower axial force of the corrosion-resistant sealing ring (3) to be equal in the vertical direction and opposite to each other, enabling the corrosion-resistant sealing ring (3) to be in the horizontal direction, enabling the inner circular table surface of the sealing part (1) to be pressed to be sealed by the inner circular cylinder surface, and the sealing part to be attached to the inner circular sealing ring surface of the sealing part, and the sealing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210867678.4A CN115217975B (en) | 2022-07-22 | Sealing device for converting axial force into radial extrusion bonding force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210867678.4A CN115217975B (en) | 2022-07-22 | Sealing device for converting axial force into radial extrusion bonding force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115217975A true CN115217975A (en) | 2022-10-21 |
| CN115217975B CN115217975B (en) | 2024-05-10 |
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