CN113847428B - Balanced pressure sealing device - Google Patents
Balanced pressure sealing device Download PDFInfo
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- CN113847428B CN113847428B CN202111003262.XA CN202111003262A CN113847428B CN 113847428 B CN113847428 B CN 113847428B CN 202111003262 A CN202111003262 A CN 202111003262A CN 113847428 B CN113847428 B CN 113847428B
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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
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
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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
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/061—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with positioning means
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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
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
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Abstract
The invention discloses a balanced pressure sealing device, wherein a balanced pressure adjusting element is positioned in a first outer side annular groove of an end face sealing element, a fifth annular boss of the balanced pressure adjusting element is positioned between a second inner cylindrical surface and a first outer cylindrical surface, the upper end face of the fifth annular boss of the balanced pressure adjusting element is contacted with a rubber sealing ring, a fifth screw is arranged in a second round hole of an end face sealing cover plate, and the fifth screw is in threaded transmission fit with a fifth threaded through hole of the balanced pressure adjusting element; the pressure on the two sides of the polytetrafluoroethylene sealing ring is always in a balanced state, no pressure difference exists on the two sides of the polytetrafluoroethylene sealing ring, the liquid-phase material and the water do not cross the power source of the polytetrafluoroethylene sealing ring, the liquid-phase material and the water are both in respective spaces, and the polytetrafluoroethylene sealing ring achieves a sealing effect.
Description
Technical Field
The invention belongs to the technical field of sealing devices, and relates to a sealing device for adjusting pressure, in particular to a sealing device for balancing pressure.
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 a liquid-phase material, so that all mechanical interfaces in the body detonation warhead part, which are contacted with the high-energy fuel, need to have sealing performance, internal stress can be generated after the temperature of the liquid-phase material is increased, and the mechanical interfaces of a shell, front and rear end covers, a loading opening, a cable-penetrating pipe, a throwing medicine pipe and the like of the liquid-phase loading warhead part need to meet the sealing requirements under certain internal stress.
Changchun et al reported in the document "missile rubber seal environmental failure study" (equipment environmental engineering, 8 months 2011, volume 8, page 4, 59): the warhead sealing material mainly adopts rubber. The rubber has good elasticity, when the rubber is in extrusion contact with the mechanical interface, the rubber is elastically deformed under the action of pressure, the rubber and the mechanical interface can be well attached, and when the internal stress does not exceed 10MPa, the sealing effect can be realized.
And the inside high energy liquid phase fuel of body detonation warhead has strong corrosivity, and high energy liquid phase fuel and rubber take place chemical reaction, and rubber after the reaction takes place to age, loses the resilience, no longer plays sealed effect, in case body detonation warhead takes place to reveal, will lead to major accident.
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 polytetrafluoroethylene and high-energy liquid-phase fuel, and finds that the polytetrafluoroethylene material and the high-energy liquid-phase fuel do not undergo a chemical reaction, the polytetrafluoroethylene material meets the compatibility with the high-energy liquid-phase fuel, a sealing ring made of the polytetrafluoroethylene material can be used for a long time in a liquid-phase loading warhead, and the sealing ring has a long-term storage condition.
But the elasticity of ptfe is poor. As a sealing ring material, elasticity is an extremely important property. The end face axial sealing structure is a commonly used sealing structure, the end face of the mechanical interface is provided with an annular sealing groove, a polytetrafluoroethylene sealing ring is arranged in the annular sealing groove, a cover plate is covered, and the polytetrafluoroethylene sealing ring is compressed to realize sealing. When the polytetrafluoroethylene sealing ring is in extrusion contact with the mechanical interface, due to the poor elasticity of the polytetrafluoroethylene sealing ring, the elastic deformation of the polytetrafluoroethylene sealing ring under the action of pressure is very small, the fit degree of the polytetrafluoroethylene sealing ring and the mechanical interface is low, one side of the polytetrafluoroethylene sealing ring is made of a liquid-phase material, the other side of the polytetrafluoroethylene sealing ring is made of air, and when the internal stress of the liquid-phase material is low, the polytetrafluoroethylene sealing ring can be sealed; the storage temperature of the body detonation warhead is-50-80 ℃, when the temperature is highest, the actually measured internal stress of the liquid phase material is not more than 0.6MPa, when the internal stress of the liquid phase material is higher, the pressure of one side of the polytetrafluoroethylene sealing ring, which is contacted with the liquid phase material, is far greater than the atmospheric pressure, and the liquid phase fuel of the side of the polytetrafluoroethylene sealing ring, which is higher in pressure, can overflow to the atmospheric pressure side due to the low attaching degree of the polytetrafluoroethylene sealing ring and the mechanical interface, so that the polytetrafluoroethylene sealing ring loses the sealing effect.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention provides a pressure balancing sealing device, the pressures on the two sides of the polytetrafluoroethylene sealing ring are always in a balanced state, no pressure difference exists on the two sides of the polytetrafluoroethylene sealing ring, the liquid-phase material and the water do not cross the power source of the polytetrafluoroethylene sealing ring, the liquid-phase material and the water are in respective spaces, and the polytetrafluoroethylene sealing ring realizes the sealing effect.
The invention provides a balanced pressure sealing device. The device comprises a corrosion-resistant sealing ring 3, and is characterized by further comprising an end face sealing element 1, an end face sealing cover plate 2, a rubber sealing ring 4 and a balance pressure adjusting element 5;
the end face sealing element 1 is in a shape of a first circular plate, the first circular plate is a revolving body, a first circular hole is formed in the center of the first circular plate, the central axis of the first circular hole is overlapped with the axis of the revolving body of the first circular plate, two circles of annular grooves are formed in the upper end of the first circular plate, the annular groove close to the inner side of the upper end of the first circular plate is a first inner side annular groove, the annular groove close to the outer side of the upper end of the first circular plate is a first outer side annular groove, the inner side face of the first outer side annular groove is a first outer cylindrical face, and the central axes of the first inner side annular groove and the first outer side annular groove are overlapped with the axis of the revolving body of the first circular plate;
the axis of the revolution body of the end face sealing element 1 is vertical to the ground, and the inside of the end face sealing element 1 is high-energy fuel, so that the invention is used for sealing the high-energy fuel;
the end face sealing cover plate 2 is in a shape of a second circular plate, the second circular plate is a revolving body, the lower end of the second circular plate is provided with a second annular boss, the inner side face of the second annular boss is a second inner cylindrical surface, the second annular boss is provided with second circular holes which are uniformly distributed in the circumferential direction, and the central axis of each second circular hole is parallel to the axis of the revolving body of the second circular plate;
the axis of a revolving body of the end face sealing cover plate 2 is superposed with the axis of a revolving body of the end face sealing element 1, the end face sealing cover plate 2 is positioned at the upper end of the end face sealing element 1, a second annular boss of the end face sealing cover plate 2 is positioned in a first outer side annular groove of the end face sealing element 1, a certain gap is formed between a second inner cylindrical surface and a first outer cylindrical surface, and the edge of a second circular plate of the end face sealing cover plate 2 is connected with the upper end face of the first circular plate of the end face sealing element 1 through a second screw;
the corrosion-resistant sealing ring 3 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 corrosion-resistant sealing ring 3 is made of polytetrafluoroethylene;
the axis of the revolving body of the corrosion-resistant sealing ring 3 is superposed with the axis of the revolving body of the end face sealing element 1, the corrosion-resistant sealing ring 3 is positioned in the middle of a first inner side annular groove of the end face sealing element 1, and the upper end of the corrosion-resistant sealing ring 3 is subjected to extrusion force of the lower end face of a second circular plate of the end face sealing cover plate 2;
the rubber sealing ring 4 is in the shape of a fourth annular body, the fourth annular body is a revolving body, and the rubber sealing ring 4 is made of rubber;
the axis of a revolving body of the rubber sealing ring 4 coincides with the axis of a revolving body of the end face sealing element 1, the rubber sealing ring 4 is positioned between a second inner cylindrical surface and a first outer cylindrical surface, the rubber sealing ring 4, the second inner cylindrical surface and the first outer cylindrical surface have extrusion forces, the end face sealing element 1, the end face sealing cover plate 2, the corrosion-resistant sealing ring 3 and the rubber sealing ring 4 form a fourth closed space, water is filled in the fourth closed space, the inner side of the corrosion-resistant sealing ring 3 is high-energy fuel, the outer side of the corrosion-resistant sealing ring 3 is water, the upper end of the rubber sealing ring 4 is water, and the lower end of the rubber sealing ring 4 is air;
the shape of the balance pressure adjusting element 5 is a fifth torus, the fifth torus is a revolving body, a fifth annular boss is arranged on the inner side of the upper end face of the fifth torus, fifth threaded through holes are circumferentially and uniformly distributed on the outer side of the upper end face of the fifth torus, and the central axis of each fifth threaded through hole is parallel to the axis of the revolving body of the fifth torus;
the axis of a revolving body of the balance pressure adjusting element 5 coincides with the axis of a revolving body of the end face sealing element 1, the balance pressure adjusting element 5 is positioned in a first outer side annular groove of the end face sealing element 1, a fifth annular boss of the balance pressure adjusting element 5 is positioned between a second inner cylindrical surface and a first outer cylindrical surface, the upper end face of the fifth annular boss of the balance pressure adjusting element 5 is contacted with the rubber sealing ring 4, a fifth screw is arranged in a second round hole of the end face sealing cover plate 2, and the fifth screw is in threaded transmission fit with a fifth threaded through hole of the balance pressure adjusting element 5;
the ratio of the diameter of the cross section of the compressed front shaft of the third ring body of the corrosion-resistant sealing ring 3 to the width of the first inner side annular groove of the end face sealing element 1 is 1:3 to 5;
the use method of the balanced pressure sealing device comprises the following steps:
step 1: assembling the corrosion-resistant sealing ring 3 with the end face sealing element 1;
and 2, step: assembling the end face sealing cover plate 2 with the end face sealing element 1;
and 3, step 3: assembling the rubber sealing ring 4 with the end face sealing element 1;
and 4, step 4: filling water into the fourth closed space;
and 5: assembling the balance pressure adjusting element 5 with the end face sealing cover plate 2;
step 6: rotating the fifth screw, and enabling the balance pressure adjusting element 5 to move upwards through the threaded transmission fit of the fifth screw and the fifth threaded through hole of the balance pressure adjusting element 5, so that the fifth annular boss of the balance pressure adjusting element 5 extrudes the rubber sealing ring 4, wherein when the ambient temperature is-50-20 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element 5 on the rubber sealing ring 4 is 200N; when the ambient temperature is 20-40 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element 5 on the rubber sealing ring 4 is 900N; when the ambient temperature is 40-60 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element 5 on the rubber sealing ring 4 is 1600N; when the ambient temperature is 60-80 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element 5 on the rubber sealing ring 4 is 2300N.
Regarding the ratio of the cross-sectional diameter of the third ring body of the corrosion-resistant seal ring 3 before compression to the width of the first inner annular groove of the face seal member 1, any one of the following 2 ways may be adopted:
implementation mode 1: the ratio of the diameter of the cross section of the compressed front shaft of the third ring body of the corrosion-resistant sealing ring 3 to the width of the first inner side annular groove of the end face sealing element 1 is 1:3.
implementation mode 2: the ratio of the diameter of the cross section of the compressed front shaft of the third ring body of the corrosion-resistant sealing ring 3 to the width of the first inner side annular groove of the end face sealing element 1 is 1:5.
the pressure balancing sealing device provided by the invention has the following technical effects:
one side of the polytetrafluoroethylene sealing ring is made of liquid-phase materials, the other side of the polytetrafluoroethylene sealing ring is made of water, when the temperature is low, the internal stress of the liquid-phase materials and the internal stress of the water on the two sides of the polytetrafluoroethylene sealing ring are small, and the liquid-phase materials and the water cannot overflow from the polytetrafluoroethylene sealing ring; when the temperature is higher, the internal stress of the liquid phase material and the water on the two sides of the polytetrafluoroethylene sealing ring is larger, the pressure on the two sides of the polytetrafluoroethylene sealing ring is always in a balanced state, no pressure difference exists on the two sides of the polytetrafluoroethylene sealing ring, the liquid phase material and the water do not cross the power source of the polytetrafluoroethylene sealing ring, the liquid phase material and the water are in respective spaces, and the polytetrafluoroethylene sealing ring realizes a sealing effect.
Drawings
Fig. 1 is a schematic view of a balanced pressure seal. 1. The device comprises an end face sealing element 2, an end face sealing cover plate 3, a corrosion-resistant sealing ring 4, a rubber sealing ring 5 and a balance pressure adjusting element.
Detailed Description
The present invention is further described in detail with reference to the drawings and examples, it should be noted that the present invention is not limited to the following examples, and equivalent modifications based on the technical scheme of the present invention are within the scope of the present invention.
Example 1:
as shown in fig. 1, the present embodiment provides a balanced pressure seal. The device comprises a corrosion-resistant sealing ring 3, and is characterized by further comprising an end face sealing element 1, an end face sealing cover plate 2, a rubber sealing ring 4 and a balance pressure adjusting element 5;
the end face sealing element 1 is in a shape of a first circular plate, the first circular plate is a revolving body, a first circular hole is formed in the center of the first circular plate, the central axis of the first circular hole is overlapped with the axis of the revolving body of the first circular plate, two circles of annular grooves are formed in the upper end of the first circular plate, the annular groove close to the inner side of the upper end of the first circular plate is a first inner side annular groove, the annular groove close to the outer side of the upper end of the first circular plate is a first outer side annular groove, the inner side face of the first outer side annular groove is a first outer cylindrical face, and the central axes of the first inner side annular groove and the first outer side annular groove are overlapped with the axis of the revolving body of the first circular plate;
the axis of the revolution body of the end face sealing element 1 is vertical to the ground, and the inside of the end face sealing element 1 is high-energy fuel, so that the invention is used for sealing the high-energy fuel;
the end face sealing cover plate 2 is in a shape of a second circular plate, the second circular plate is a revolving body, the lower end of the second circular plate is provided with a second annular boss, the inner side face of the second annular boss is a second inner cylindrical surface, second circular holes are uniformly distributed in the circumferential direction on the second annular boss, and the central axis of each second circular hole is parallel to the axis of the revolving body of the second circular plate;
the axis of a revolving body of the end face sealing cover plate 2 is superposed with the axis of a revolving body of the end face sealing element 1, the end face sealing cover plate 2 is positioned at the upper end of the end face sealing element 1, a second annular boss of the end face sealing cover plate 2 is positioned in a first outer side annular groove of the end face sealing element 1, a certain gap is formed between a second inner cylindrical surface and a first outer cylindrical surface, and the edge of a second circular plate of the end face sealing cover plate 2 is connected with the upper end face of the first circular plate of the end face sealing element 1 through a second screw;
the corrosion-resistant sealing ring 3 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 corrosion-resistant sealing ring 3 is made of polytetrafluoroethylene;
the axis of the revolving body of the corrosion-resistant sealing ring 3 is superposed with the axis of the revolving body of the end face sealing element 1, the corrosion-resistant sealing ring 3 is positioned in the middle of a first inner side annular groove of the end face sealing element 1, and the upper end of the corrosion-resistant sealing ring 3 is subjected to extrusion force of the lower end face of a second circular plate of the end face sealing cover plate 2;
the rubber sealing ring 4 is in the shape of a fourth annular body, the fourth annular body is a revolving body, and the rubber sealing ring 4 is made of rubber;
the axis of a revolving body of the rubber sealing ring 4 coincides with the axis of a revolving body of the end face sealing element 1, the rubber sealing ring 4 is positioned between a second inner cylindrical surface and a first outer cylindrical surface, the rubber sealing ring 4, the second inner cylindrical surface and the first outer cylindrical surface have extrusion forces, the end face sealing element 1, the end face sealing cover plate 2, the corrosion-resistant sealing ring 3 and the rubber sealing ring 4 form a fourth closed space, water is filled in the fourth closed space, the inner side of the corrosion-resistant sealing ring 3 is high-energy fuel, the outer side of the corrosion-resistant sealing ring 3 is water, the upper end of the rubber sealing ring 4 is water, and the lower end of the rubber sealing ring 4 is air;
the shape of the balance pressure adjusting element 5 is a fifth torus, the fifth torus is a revolving body, a fifth annular boss is arranged on the inner side of the upper end face of the fifth torus, fifth threaded through holes are uniformly distributed in the circumferential direction on the outer side of the upper end face of the fifth torus, and the central axis of each fifth threaded through hole is parallel to the axis of the revolving body of the fifth torus;
the axis of a revolving body of the balance pressure adjusting element 5 coincides with the axis of a revolving body of the end face sealing element 1, the balance pressure adjusting element 5 is positioned in a first outer side annular groove of the end face sealing element 1, a fifth annular boss of the balance pressure adjusting element 5 is positioned between a second inner cylindrical surface and a first outer cylindrical surface, the upper end face of the fifth annular boss of the balance pressure adjusting element 5 is contacted with the rubber sealing ring 4, a fifth screw is arranged in a second round hole of the end face sealing cover plate 2, and the fifth screw is in threaded transmission fit with a fifth threaded through hole of the balance pressure adjusting element 5;
the using method and the working principle of the invention are as follows:
the use method of the balanced pressure sealing device comprises the following steps:
step 1: assembling the corrosion-resistant sealing ring 3 with the end face sealing element 1;
step 2: assembling the end face sealing cover plate 2 with the end face sealing element 1;
and step 3: assembling the rubber sealing ring 4 with the end face sealing element 1;
and 4, step 4: filling water into the fourth closed space;
and 5: assembling the balance pressure adjusting element 5 with the end face sealing cover plate 2;
step 6: rotating a fifth screw, and in a transmission fit with a fifth thread through hole thread of the balance pressure adjusting element 5 through the fifth screw, enabling the balance pressure adjusting element 5 to move upwards, so that a fifth annular boss of the balance pressure adjusting element 5 extrudes the rubber seal ring 4, wherein when the ambient temperature is-50-20 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element 5 on the rubber seal ring 4 is 200N; when the ambient temperature is 20-40 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element 5 on the rubber sealing ring 4 is 900N; when the ambient temperature is 40-60 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element 5 on the rubber sealing ring 4 is 1600N; when the ambient temperature is 60-80 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element 5 on the rubber sealing ring 4 is 2300N.
The working principle of the invention is as follows:
corrosion-resistant sealing washer 3 satisfies the compatibility with corrosive liquid phase fuel, but corrosion-resistant sealing washer 3 elasticity is too poor, and is too little with the laminating degree of mechanical interface, and is too big when the liquid phase fuel internal stress of corrosion-resistant sealing washer 3 one side, and when corrosion-resistant sealing washer 3 opposite side was atmospheric pressure, the pressure differential has been formed to corrosion-resistant sealing washer 3 both sides, and too big pressure differential will lead to liquid phase fuel to flow to the opposite side from corrosion-resistant sealing washer 3 one side, and the result is exactly to leak.
According to the invention, air is changed into water on the other side of the corrosion-resistant sealing ring 3, when the temperature rises, the temperature of liquid-phase fuel and the temperature of water rise simultaneously, the internal stress increases simultaneously, and when the internal stress of water does not increase enough, the rubber sealing ring 4 is pressed upwards by the balance pressure adjusting element 5 under the action of the screw, and then the water is pressed by the rubber sealing ring 4, so that the internal stress of water is supplemented, the internal stress on two sides of the corrosion-resistant sealing ring 3 is simultaneously improved, the pressure difference on the two sides is reduced, the pressure balance is achieved, the pressure difference does not exist after the balance, the power source of liquid leakage is avoided, and the sealing is realized.
As for the rubber seal ring 4, one end of the rubber seal ring 4 is water with large internal stress, the other end of the rubber seal ring is atmospheric pressure, although a large pressure difference exists, the material of the rubber seal ring 4 is rubber, the rubber elasticity is good, the degree of adhesion with the sealing interface is high, and the rubber seal ring 4 can seal the pressure difference of 10mpa, so the rubber seal ring 4 is not afraid of the pressure difference, that is, the invention transfers the huge pressure difference at two sides of the corrosion-resistant seal ring 3 to the huge pressure difference at two sides of the rubber seal ring 4, and the rubber seal ring 4 is not afraid of the pressure difference at two sides, thereby realizing the corrosion resistance and the sealing.
The end face sealing element 1 is one of mechanical interfaces of an end face sealing structure, liquid phase fuel is arranged inside the end face sealing element 1, the end face sealing element 1 needs to be sealed, and a sealing groove is formed in the end face sealing element 1 and can be used for mounting a sealing ring. The end face sealing cover plate 2 is one of mechanical interfaces of the end face sealing structure, the end face sealing cover plate 2 covers the end face sealing element 1, and a sealing ring is arranged between the end face sealing element 1 and the end face sealing cover plate 2 to realize the sealing of the mechanical interfaces. The corrosion-resistant sealing ring 3 can withstand the corrosive capacity of corrosive liquid fuels. The rubber sealing ring 4 can bear the sealing when the pressure difference between two sides is large. The balance pressure adjusting element 5 can realize extrusion force on the rubber sealing ring 4 through a screw, so as to adjust the internal stress of water, and balance the pressure on two sides of the corrosion-resistant sealing ring 3. Thereby achieving sealing.
The end face sealing element 1 and the end face sealing cover plate 2 are mechanical interfaces of a body detonation warhead, and high-energy fuel is filled in the sealing interfaces of the end face sealing element 1 and the end face sealing cover plate 2.
The actual measurement internal stress of the liquid phase material is not more than 0.6MPa, and the internal stress is larger, so that the method is not applicable, and because the internal stress is larger, the pressure on two sides of the corrosion-resistant sealing ring 3 is too large, the corrosion-resistant sealing ring 3 is permanently deformed, and the elasticity is lost, so that the leakage is caused.
When different environmental temperatures exist, the extrusion force of the fifth annular boss of the balance pressure adjusting element 5 on the rubber sealing ring 4 is different, and the purpose is that different environmental temperatures and the volume expansion stress of the high-energy fuel are different, water cannot reach the stress at the temperature, the water can only be compensated by applying driving force by the balance pressure adjusting element 5, the final purpose is still to enable the internal stress of the water and the internal stress of the high-energy fuel to be kept at a same level all the time, the pressure difference between two ends of the corrosion-resistant sealing ring 3 is not too large, and sealing is realized.
When the ratio of the diameter of the cross section of the compressed front shaft of the third ring body of the corrosion-resistant sealing ring 3 to the width of the first inner side annular groove of the end face sealing element 1 is too small, the width of the first inner side annular groove of the end face sealing element 1 is too large, and the distance that the corrosion-resistant sealing ring 3 can expand is too large, because the corrosion-resistant sealing ring 3 can reduce the pressure difference by diameter expansion or reduction when the pressure difference exists between the inside and the outside, if the diameter that the corrosion-resistant sealing ring 3 can deform is too large, the change range of the diameter of the shaft cross section is too large, and when the diameter of the shaft cross section of the corrosion-resistant sealing ring 3 is smaller than the depth of the sealing groove, the corrosion-resistant sealing ring 3 is not contacted with the end face sealing cover plate 2 any more, so that leakage is caused; when the ratio of the diameter of the cross section of the compressed front shaft of the third ring body of the corrosion-resistant sealing ring 3 to the width of the first inner side annular groove of the end face sealing element 1 is too large, the width of the first inner side annular groove of the end face sealing element 1 is too small, the distance that the corrosion-resistant sealing ring 3 can expand is too small, and the diameter change of the corrosion-resistant sealing ring 3 in a certain range is a method for balancing the pressure when the pressure on the two sides of the sealing ring is adjusted. Through partial theoretical calculation, the staff who has relevant working experience is summoned to consult the discussion collectively to decompose above problem, and each module carries out experimental evaluation alone, finally thinks, and the third ring body of corrosion-resistant sealing washer 3 is by 1 before the compression shaft cross-section diameter and the first inboard annular groove width of end face seal component 1: 3-5, the problems can be avoided, the design advantages of the invention can be embodied, the functions of the invention can be fully exerted, and the problems can be completely solved by using the invention.
In this embodiment, the ratio of the diameter of the cross section of the compressed front shaft of the third ring body of the corrosion-resistant seal ring 3 to the width of the first inner annular groove of the end face seal element 1 is 1:3;
processing 20 pieces of the invention, filling high-energy fuel in the sealing ring, increasing the temperature from minus 50 ℃ to 80 ℃, storing for 3 days, decreasing the temperature from 80 ℃ to minus 50 ℃ again, storing for 3 days, reducing the temperature for 10 times in a cycle, opening the end face sealing cover plate 2, and finding that the water on one side of the corrosion-resistant sealing ring 3 does not flow to the high-energy fuel and the high-energy fuel on the other side of the corrosion-resistant sealing ring 3 does not flow to the water. The invention proves to be effective.
The pressure balancing sealing device provided by the invention has the following technical effects:
according to the polytetrafluoroethylene sealing ring, one side of the polytetrafluoroethylene sealing ring is made of the liquid-phase material, the other side of the polytetrafluoroethylene sealing ring is made of water, when the temperature is low, the internal stress of the liquid-phase material and the internal stress of the water on the two sides of the polytetrafluoroethylene sealing ring are small, and the liquid-phase material and the water cannot overflow from the polytetrafluoroethylene sealing ring; when the temperature is higher, the internal stress of the liquid phase material and the water on the two sides of the polytetrafluoroethylene sealing ring is larger, the pressure on the two sides of the polytetrafluoroethylene sealing ring is always in a balanced state, no pressure difference exists on the two sides of the polytetrafluoroethylene sealing ring, the liquid phase material and the water do not cross the power source of the polytetrafluoroethylene sealing ring, the liquid phase material and the water are in respective spaces, and the polytetrafluoroethylene sealing ring realizes a sealing effect.
Example 2:
example 2 differs from example 1 in that:
in this embodiment, the ratio of the diameter of the cross section of the compressed front shaft of the third ring body of the corrosion-resistant seal ring 3 to the width of the first inner annular groove of the end face seal element 1 is 1:5;
processing 20 pieces of the invention, filling high-energy fuel inside, raising the temperature from minus 50 ℃ to 80 ℃, storing for 3 days, lowering the temperature from 80 ℃ to minus 50 ℃ again, storing for 3 days, and thus, lowering the temperature for 10 times by cycle, finding that the high-energy fuel does not leak, opening the end face sealing cover plate 2, finding that the water on one side of the corrosion-resistant sealing ring 3 does not flow to the high-energy fuel, and finding that the high-energy fuel on the other side of the corrosion-resistant sealing ring 3 does not flow to the water. The invention proves to be effective.
The pressure balancing sealing device provided by the invention has the following technical effects:
according to the polytetrafluoroethylene sealing ring, one side of the polytetrafluoroethylene sealing ring is made of the liquid-phase material, the other side of the polytetrafluoroethylene sealing ring is made of water, when the temperature is low, the internal stress of the liquid-phase material and the internal stress of the water on the two sides of the polytetrafluoroethylene sealing ring are small, and the liquid-phase material and the water cannot overflow from the polytetrafluoroethylene sealing ring; when the temperature is higher, the internal stress of the liquid phase material and the water on the two sides of the polytetrafluoroethylene sealing ring is larger, the pressure on the two sides of the polytetrafluoroethylene sealing ring is always in a balanced state, no pressure difference exists on the two sides of the polytetrafluoroethylene sealing ring, the liquid phase material and the water do not cross a power source of the polytetrafluoroethylene sealing ring, the liquid phase material and the water are both in respective spaces, and the polytetrafluoroethylene sealing ring realizes a sealing effect.
Claims (3)
1. The utility model provides a balanced pressure seal device, this balanced pressure seal device is used for realizing the sealed of high energy fuel, its characterized in that, including corrosion-resistant sealing washer (3), end face seal component (1), end face seal apron (2), rubber seal (4), balanced pressure adjusting element (5), wherein:
the end face sealing element (1) is in a shape of a first circular plate and is a revolving body, a first circular hole is formed in the center of the first circular plate, the central axis of the first circular hole is overlapped with the axis of the revolving body of the first circular plate, two rings of annular grooves are formed in the upper end of the first circular plate, the annular groove close to the inner side of the upper end of the first circular plate is a first inner annular groove, the annular groove close to the outer side of the upper end of the first circular plate is a first outer annular groove, the inner side surface of the first outer annular groove is a first outer cylindrical surface, and the central axes of the first inner annular groove and the first outer annular groove are overlapped with the axis of the revolving body of the first circular plate;
the axis of the revolution body of the end face sealing element (1) is vertical to the ground, and the inside of the end face sealing element (1) is high-energy fuel;
the end face sealing cover plate (2) is in a shape of a second circular plate and is a revolving body, a second annular boss is arranged at the lower end of the second circular plate, the inner side face of the second annular boss is a second inner cylindrical surface, second circular holes are uniformly distributed in the circumferential direction on the second annular boss, and the central axis of each second circular hole is parallel to the axis of the revolving body of the second circular plate;
the axis of the revolving body of the end face sealing cover plate (2) is superposed with the axis of the revolving body of the end face sealing element (1), the end face sealing cover plate (2) is positioned at the upper end of the end face sealing element (1), a second annular boss of the end face sealing cover plate (2) is positioned in a first outer side annular groove of the end face sealing element (1), a certain gap is reserved between a second inner cylindrical surface and a first outer cylindrical surface, and the edge of a second circular plate of the end face sealing cover plate (2) is connected with the upper end face of the first circular plate of the end face sealing element (1) through a second screw;
the corrosion-resistant sealing ring (3) is a third circular ring body and 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 (3) is superposed with the axis of a revolving body of the end face sealing element (1), the corrosion-resistant sealing ring (3) is positioned in the middle of a first inner side annular groove of the end face sealing element (1), and the upper end of the corrosion-resistant sealing ring (3) is subjected to extrusion force of the lower end face of a second circular plate of the end face sealing cover plate (2);
the rubber sealing ring (4) is a fourth annular body and is a revolving body made of rubber;
the axis of a revolving body of the rubber sealing ring (4) coincides with the axis of a revolving body of the end face sealing element (1), the rubber sealing ring (4) is positioned between the second inner cylindrical surface and the first outer cylindrical surface, the rubber sealing ring (4) and the second inner cylindrical surface and the first outer cylindrical surface have extrusion forces, the end face sealing element (1), the end face sealing cover plate (2), the corrosion-resistant sealing ring (3) and the rubber sealing ring (4) form a fourth closed space, water is filled in the fourth closed space, the inner side of the corrosion-resistant sealing ring (3) is high-energy fuel, the outer side of the corrosion-resistant sealing ring (3) is water, the upper end of the rubber sealing ring (4) is water, and the lower end of the rubber sealing ring (4) is air;
the balance pressure adjusting element (5) is in the shape of a fifth torus and is a revolving body, a fifth annular boss is arranged on the inner side of the upper end face of the fifth torus, fifth threaded through holes are uniformly distributed in the circumferential direction on the outer side of the upper end face of the fifth torus, and the central axis of each fifth threaded through hole is parallel to the axis of the revolving body of the fifth torus;
the axis of a revolving body of the balance pressure adjusting element (5) is coincided with the axis of a revolving body of the end face sealing element (1), the balance pressure adjusting element (5) is positioned in a first outer side annular groove of the end face sealing element (1), a fifth annular boss of the balance pressure adjusting element (5) is positioned between a second inner cylindrical surface and a first outer cylindrical surface, the upper end face of the fifth annular boss of the balance pressure adjusting element (5) is contacted with the rubber sealing ring (4), a fifth screw is arranged in a second round hole of the end face sealing cover plate (2), and the fifth screw is in threaded transmission fit with a fifth threaded through hole of the balance pressure adjusting element (5);
the ratio of the diameter of the cross section of the compressed front shaft of the third circular ring body of the corrosion-resistant sealing ring (3) to the width of the first inner side annular groove of the end face sealing element (1) is 1:3 to 5;
the use method of the balanced pressure sealing device comprises the following steps:
step 1: assembling the corrosion-resistant sealing ring (3) with the end face sealing element (1);
step 2: assembling the end face sealing cover plate (2) with the end face sealing element (1);
and step 3: assembling the rubber sealing ring (4) with the end face sealing element (1);
and 4, step 4: filling water into the fourth closed space;
and 5: assembling a balance pressure adjusting element (5) with the end face sealing cover plate (2);
step 6: rotating the fifth screw, and enabling the balance pressure adjusting element (5) to move upwards through the threaded transmission fit of the fifth screw and a fifth threaded through hole of the balance pressure adjusting element (5), so that a fifth annular boss of the balance pressure adjusting element (5) extrudes the rubber sealing ring (4), wherein when the ambient temperature is-50-20 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element (5) on the rubber sealing ring (4) is 200N; when the ambient temperature is 20-40 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element (5) to the rubber sealing ring (4) is 900N; when the ambient temperature is 40-60 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element (5) on the rubber sealing ring (4) is 600N of the end face sealing element (1); when the ambient temperature is 60-80 ℃, the extrusion force of the fifth annular boss of the balance pressure adjusting element (5) to the rubber sealing ring (4) is 2300N.
2. A balanced pressure sealing arrangement according to claim 1, characterised in that the ratio of the cross-sectional diameter of the third ring of the corrosion-resistant sealing ring (3) before compression to the width of the first inner annular groove of the face seal element (1) is 1:3.
3. a balanced pressure sealing arrangement according to claim 1, characterised in that the ratio of the cross-sectional diameter of the third ring of the corrosion-resistant sealing ring (3) before compression to the width of the first inner annular groove of the face seal element (1) is 1:5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111003262.XA CN113847428B (en) | 2021-08-30 | 2021-08-30 | Balanced pressure sealing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111003262.XA CN113847428B (en) | 2021-08-30 | 2021-08-30 | Balanced pressure sealing device |
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| CN113847428A CN113847428A (en) | 2021-12-28 |
| CN113847428B true CN113847428B (en) | 2023-01-17 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH532215A (en) * | 1971-03-23 | 1972-12-31 | Pekrun Werner | Sealing between an inner and an outer part surrounding it |
| DE19534217A1 (en) * | 1995-09-15 | 1997-03-20 | Diehl Gmbh & Co | Tandem warhead with a secondary floor |
| CN101806363B (en) * | 2010-04-30 | 2011-08-10 | 南京理工大学 | High-pressure high-temperature two-way balance stop valve |
| FR3051878B1 (en) * | 2016-05-24 | 2018-10-26 | Onis | HIGH PRESSURE STATIC SEALING |
| CN112033237B (en) * | 2020-08-25 | 2022-08-19 | 西安近代化学研究所 | End face sealing device for uneven end face |
| CN112879564B (en) * | 2021-01-13 | 2022-10-25 | 西安近代化学研究所 | Corrosion-resistant sealing device for generating continuous axial fitting force by utilizing Poisson effect |
| CN113028057A (en) * | 2021-04-21 | 2021-06-25 | 南京厚孚机械科技有限公司 | Improvement of circular polyurethane washer in narrow space |
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