阅读说明：本技术 一种通过密封圈自由运动实现全空间等压受力状态的耐腐蚀防泄漏装置 (Corrosion-resistant leakage-proof device for realizing full-space isobaric stress state through free movement of sealing ring ) 是由 许志峰 袁宝慧 计冬奎 曹玉武 王世英 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种通过密封圈自由运动实现全空间等压受力状态的耐腐蚀防泄漏装置,耐压差密封圈的上端受到轴孔密封元件的第二外法兰下端面的挤压力,孔类密封元件、轴孔密封元件、自由运动密封圈、耐压差密封圈组成了第四封闭空间,第四封闭空间中装有油,自由运动密封圈的下端为高能燃料,自由运动密封圈的上端为油,耐压差密封圈的内侧为油,耐压差密封圈的外侧为空气；本发明的聚四氟乙烯密封圈在压力差驱动上下移动,通过调节油的空间调节油的内应力,使高能燃料和油的内应力相等,液相材料和油均没有越过聚四氟乙烯密封圈的动力源,液相材料和油均处在各自的空间内,聚四氟乙烯密封圈实现了密封效果。(The invention discloses a corrosion-resistant leakage-proof device for realizing a full-space isobaric stress state through free movement of a sealing ring, wherein the upper end of a pressure-resistant differential sealing ring is subjected to extrusion force of the lower end surface of a second outer flange of a shaft hole sealing element, the shaft hole sealing element, the free movement sealing ring and the pressure-resistant differential sealing ring form a fourth closed space, oil is filled in the fourth closed space, the lower end of the free movement sealing ring is high-energy fuel, the upper end of the free movement sealing ring is oil, the inner side of the pressure-resistant differential sealing ring is oil, and the outer side of the pressure-resistant differential sealing ring is air; the polytetrafluoroethylene sealing ring disclosed by the invention is driven to move up and down by pressure difference, the internal stress of oil is regulated by regulating the space of the oil, so that the internal stresses of high-energy fuel and the oil are equal, liquid-phase materials and the oil do not cross a power source of the polytetrafluoroethylene sealing ring, the liquid-phase materials and the oil are in respective spaces, and the polytetrafluoroethylene sealing ring realizes a sealing effect.)

1. A corrosion-resistant leakage-proof device for realizing a full-space isobaric stress state through free movement of a sealing ring. The device comprises a free movement sealing ring (3), and is characterized by also comprising a hole sealing element (1), a shaft hole sealing element (2), a pressure difference resistant sealing ring (4) and a coaxial positioning pin (5);

the hole 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 inner side face of the first circular hole is a first inner cylindrical surface, a first annular groove is formed in the upper end of the first circular plate, four first circular blind holes are uniformly distributed in the circumferential direction in the upper end of the first circular plate, the first circular blind holes are located on the outer side of the first annular groove, and the central axis of each first circular blind hole is parallel to the axis of the revolving body of the first circular plate;

the axis of the revolving body of the hole sealing element (1) is vertical to the ground, and the lower end of the hole sealing element (1) is provided with high-energy fuel, so that the hole sealing element is used for sealing the high-energy fuel;

the shaft hole sealing element (2) is in a shape of a second cylinder body, the second cylinder body is a revolving body, the middle part of the outer side of the second cylinder body is provided with a second annular groove, the uppermost end of the outer side of the second cylinder body is provided with a second outer flange, the lower end of the second outer flange is provided with four second circular blind holes which are uniformly distributed in the circumferential direction, and the central axis of each second circular blind hole is parallel to the axis of the revolving body of the second cylinder body;

the axis of the revolving body of the shaft hole sealing element (2) is superposed with the axis of the revolving body of the hole sealing element (1), a second cylinder of the shaft hole sealing element (2) is positioned inside a first round hole of the hole sealing element (1), a second outer flange of the shaft hole sealing element (2) is positioned at the upper end of a first circular plate of the hole sealing element (1), and the edge of the second outer flange is connected with the upper end face of the first circular plate through a second screw;

the free movement sealing ring (3) is in 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 free movement sealing ring (3) is made of polytetrafluoroethylene;

the axis of a revolving body of the free movement sealing ring (3) is superposed with the axis of a revolving body of the hole sealing element (1), the free movement sealing ring (3) is positioned in the middle of a second annular groove of the shaft hole sealing element (2), and the outer side of the free movement sealing ring (3) is extruded by a first inner cylindrical surface;

the pressure difference resistant sealing ring (4) is in the shape of a fourth ring body, the fourth ring body is a revolving body, and the pressure difference resistant sealing ring (4) is made of rubber;

the revolving body axis of the pressure-difference-resistant sealing ring (4) is coincided with the revolving body axis of the hole sealing element (1), the pressure-difference-resistant sealing ring (4) is positioned in a first annular groove of the hole sealing element (1), the upper end of the pressure-difference-resistant sealing ring (4) is subjected to extrusion force of the lower end face of a second outer flange of the shaft hole sealing element (2), the hole sealing element (1), the shaft hole sealing element (2), the free movement sealing ring (3) and the pressure-difference-resistant sealing ring (4) form a fourth closed space, oil is filled in the fourth closed space, the lower end of the free movement sealing ring (3) is high-energy fuel, the upper end of the free movement sealing ring (3) is oil, the inner side of the pressure-difference-resistant sealing ring (4) is oil, and the outer side of the pressure-difference-resistant sealing ring (4) is air;

the coaxial positioning pins (5) are in the shape of a fifth torus, the fifth torus is a revolving body, and the number of the coaxial positioning pins (5) is four;

the revolving body axis of the coaxial positioning pin (5) is parallel to the revolving body axis of the hole sealing element (1), the lower end of the coaxial positioning pin (5) is positioned in a first round blind hole of the hole sealing element (1), and the upper end of the coaxial positioning pin (5) is positioned in a second round blind hole of the shaft hole sealing element (2);

the ratio of the diameter of the cross section of the compressed front shaft of the third circular ring body of the free movement sealing ring (3) to the width of the second annular groove of the shaft hole sealing element (2) is 1: 5-6;

the corrosion-resistant and leakage-proof device for realizing the isobaric stress state of the whole space through the free movement of the sealing ring comprises the following steps:

step 1: assembling the pressure difference resistant sealing ring (4) with the hole sealing element (1);

step 2: assembling a coaxial positioning pin (5) with the hole sealing element (1);

and step 3: assembling the free movement sealing ring (3) with the shaft hole sealing element (2);

and 4, step 4: filling oil into the fourth enclosed space;

and 5: assembling the shaft hole sealing element (2) and the hole sealing element (1);

step 6: and rotating the second screw to enable the upper end of the coaxial positioning pin (5) to enter a second round blind hole of the shaft hole sealing element (2), rotating the second screw clockwise by 30 degrees each time, and then rotating the next second screw clockwise until all the second screws are rotated to the position.

2. The corrosion-resistant leakage-proof device for realizing the pressure-bearing state with equal pressure in the whole space by the free movement of the sealing ring according to claim 1, wherein the ratio of the cross-sectional diameter of the shaft before the compression of the third ring body of the free movement sealing ring (3) to the width of the second annular groove of the shaft hole sealing element (2) is 1: 5.

3. the corrosion-resistant leakage-proof device for realizing the pressure-bearing state with equal pressure in the whole space by the free movement of the sealing ring according to claim 1, wherein the ratio of the cross-sectional diameter of the shaft before the compression of the third ring body of the free movement sealing ring (3) to the width of the second annular groove of the shaft hole sealing element (2) is 1: 6.

Technical Field

The invention belongs to the technical field of corrosion-resistant and leakage-proof devices, relates to a corrosion-resistant and leakage-proof device in an isobaric stress state, and particularly relates to a corrosion-resistant and leakage-proof device for realizing a full-space isobaric stress state through free movement of a sealing ring.

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 in contact with the high-energy fuel, need to have sealing performance, internal stress can be generated after the temperature of the liquid-phase material rises, and the mechanical interfaces of a shell, front and rear end covers, a loading opening, a cable-penetrating line pipe, a throwing powder 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 (aeronautical materials bulletin, 12 months 2013, volume 33, page 6, 57) was reported by ssdona et al in the literature: 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 radial sealing structure is a commonly used sealing structure, a mechanical interface consists of a hole part and a shaft part, an outer cylindrical surface of the shaft part is provided with an annular sealing groove, a polytetrafluoroethylene sealing ring is arranged in the annular sealing groove, and the polytetrafluoroethylene sealing ring is tightly attached to the hole part and the shaft part simultaneously 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 of the prior art, the invention provides the corrosion-resistant and leakage-proof device for realizing the full-space isobaric stress state through the free movement of the sealing ring.

The invention provides a corrosion-resistant leakage-proof device which realizes a full-space isobaric stress state through free movement of a sealing ring. The device comprises a free movement sealing ring 3, and is characterized by further comprising a hole sealing element 1, a shaft hole sealing element 2, a pressure difference resistant sealing ring 4 and a coaxial positioning pin 5;

the hole 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 inner side face of the first circular hole is a first inner cylindrical surface, a first annular groove is formed in the upper end of the first circular plate, four first circular blind holes are uniformly distributed in the circumferential direction in the upper end of the first circular plate, the first circular blind holes are located on the outer side of the first annular groove, and the central axis of each first circular blind hole is parallel to the axis of the revolving body of the first circular plate;

the axis of the revolving body of the hole sealing element 1 is vertical to the ground, and the lower end of the hole sealing element 1 is provided with high-energy fuel;

the shaft hole sealing element 2 is in the shape of a second cylinder body, the second cylinder body is a revolving body, the middle part of the outer side of the second cylinder body is provided with a second annular groove, the uppermost end of the outer side of the second cylinder body is provided with a second outer flange, the lower end of the second outer flange is provided with four second circular blind holes which are uniformly distributed in the circumferential direction, and the central axis of each second circular blind hole is parallel to the axis of the revolving body of the second cylinder body;

the revolving body axis of the shaft hole sealing element 2 is superposed with the revolving body axis of the hole sealing element 1, a second cylinder of the shaft hole sealing element 2 is positioned inside a first round hole of the hole sealing element 1, a second outer flange of the shaft hole sealing element 2 is positioned at the upper end of a first round plate of the hole sealing element 1, and the edge of the second outer flange is connected with the upper end face of the first round plate through a second screw;

the free movement sealing ring 3 is in 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 free movement sealing ring 3 is made of polytetrafluoroethylene;

the axis of the revolving body of the free movement sealing ring 3 is superposed with the axis of the revolving body of the hole sealing element 1, the free movement sealing ring 3 is positioned in the middle of the second annular groove of the shaft hole sealing element 2, and the outer side of the free movement sealing ring 3 is extruded by the first inner cylindrical surface;

the pressure difference resistant sealing ring 4 is in the shape of a fourth ring body, the fourth ring body is a revolving body, and the pressure difference resistant sealing ring 4 is made of rubber;

the revolving body axis of the pressure-difference-resistant sealing ring 4 is coincided with the revolving body axis of the hole sealing element 1, the pressure-difference-resistant sealing ring 4 is positioned in a first annular groove of the hole sealing element 1, the upper end of the pressure-difference-resistant sealing ring 4 is subjected to extrusion force of the lower end face of a second outer flange of the shaft hole sealing element 2, the hole sealing element 1, the shaft hole sealing element 2, the free movement sealing ring 3 and the pressure-difference-resistant sealing ring 4 form a fourth closed space, oil is filled in the fourth closed space, the lower end of the free movement sealing ring 3 is high-energy fuel, the upper end of the free movement sealing ring 3 is oil, the inner side of the pressure-difference-resistant sealing ring 4 is oil, and the outer side of the pressure-difference-resistant sealing ring 4 is air;

the coaxial positioning pins 5 are in the shape of a fifth torus, the fifth torus is a revolving body, and the number of the coaxial positioning pins 5 is four;

the axis of the revolving body of the coaxial positioning pin 5 is parallel to the axis of the revolving body of the hole sealing element 1, the lower end of the coaxial positioning pin 5 is positioned in the first round blind hole of the hole sealing element 1, and the upper end of the coaxial positioning pin 5 is positioned in the second round blind hole of the shaft hole sealing element 2;

the ratio of the diameter of the cross section of the compressed front shaft of the third ring body of the free movement sealing ring 3 to the width of the second annular groove of the shaft hole sealing element 2 is 1: 5-6;

the corrosion-resistant and leakage-proof device for realizing the isobaric stress state of the whole space through the free movement of the sealing ring comprises the following steps:

step 1: assembling the pressure-difference-resistant sealing ring 4 with the hole sealing element 1;

step 2: assembling the coaxial positioning pin 5 with the hole sealing element 1;

and step 3: assembling the free movement sealing ring 3 with the shaft hole sealing element 2;

and 4, step 4: filling oil into the fourth enclosed space;

and 5: assembling the shaft hole sealing element 2 and the hole sealing element 1;

step 6: and rotating the second screw to enable the upper end of the coaxial positioning pin 5 to enter the second round blind hole of the shaft hole sealing element 2, rotating the second screw clockwise by 30 degrees each time, and then rotating the next second screw clockwise until all the second screws are rotated to the right position.

Regarding the ratio of the cross-sectional diameter of the third ring body of the free-running seal ring 3 before compression to the width of the second annular groove of the shaft hole seal member 2, any 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 free movement sealing ring 3 to the width of the second annular groove of the shaft hole sealing element 2 is 1: 5.

implementation mode 2: the ratio of the diameter of the cross section of the compressed front shaft of the third ring body of the free movement sealing ring 3 to the width of the second annular groove of the shaft hole sealing element 2 is 1: 6.

the invention relates to a corrosion-resistant leakage-proof device for realizing a full-space isobaric stress state through free movement of a sealing ring, which has the following technical effects:

the polytetrafluoroethylene sealing ring can move up and down freely in the sealing groove, the internal stress of the high-energy fuel and the oil is improved along with the rise of the environmental temperature, although pressure difference exists, the polytetrafluoroethylene sealing ring moves up and down under the driving of the pressure difference, the internal stress of the oil is adjusted through adjusting the space of the oil, so that the internal stress of the high-energy fuel and the internal stress of the oil are equal, finally, the polytetrafluoroethylene sealing ring is in a full-space isobaric stress state, liquid-phase materials and the oil do not cross a power source of the polytetrafluoroethylene sealing ring, the liquid-phase materials and the oil are in respective spaces, and the polytetrafluoroethylene sealing ring achieves a sealing effect.

Drawings

Fig. 1 is a schematic structural diagram of a corrosion-resistant leakage-proof device for realizing a full-space isobaric stress state through free movement of a sealing ring. 1. The sealing device comprises a hole sealing element 2, a shaft hole sealing element 3, a free movement sealing ring 4, a pressure difference resistant sealing ring 5 and a coaxial positioning pin.

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 changes 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 corrosion-resistant and leakage-proof device for realizing a full-space isobaric stress state through the free movement of a sealing ring. The device comprises a free movement sealing ring 3, and is characterized by further comprising a hole sealing element 1, a shaft hole sealing element 2, a pressure difference resistant sealing ring 4 and a coaxial positioning pin 5;

the hole 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 inner side face of the first circular hole is a first inner cylindrical surface, a first annular groove is formed in the upper end of the first circular plate, four first circular blind holes are uniformly distributed in the circumferential direction in the upper end of the first circular plate, the first circular blind holes are located on the outer side of the first annular groove, and the central axis of each first circular blind hole is parallel to the axis of the revolving body of the first circular plate;

the axis of the revolving body of the hole sealing element 1 is vertical to the ground, and the lower end of the hole sealing element 1 is provided with high-energy fuel;

the shaft hole sealing element 2 is in the shape of a second cylinder body, the second cylinder body is a revolving body, the middle part of the outer side of the second cylinder body is provided with a second annular groove, the uppermost end of the outer side of the second cylinder body is provided with a second outer flange, the lower end of the second outer flange is provided with four second circular blind holes which are uniformly distributed in the circumferential direction, and the central axis of each second circular blind hole is parallel to the axis of the revolving body of the second cylinder body;

the revolving body axis of the shaft hole sealing element 2 is superposed with the revolving body axis of the hole sealing element 1, a second cylinder of the shaft hole sealing element 2 is positioned inside a first round hole of the hole sealing element 1, a second outer flange of the shaft hole sealing element 2 is positioned at the upper end of a first round plate of the hole sealing element 1, and the edge of the second outer flange is connected with the upper end face of the first round plate through a second screw;

the free movement sealing ring 3 is in 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 free movement sealing ring 3 is made of polytetrafluoroethylene;

the axis of the revolving body of the free movement sealing ring 3 is superposed with the axis of the revolving body of the hole sealing element 1, the free movement sealing ring 3 is positioned in the middle of the second annular groove of the shaft hole sealing element 2, and the outer side of the free movement sealing ring 3 is extruded by the first inner cylindrical surface;

the pressure difference resistant sealing ring 4 is in the shape of a fourth ring body, the fourth ring body is a revolving body, and the pressure difference resistant sealing ring 4 is made of rubber;

the revolving body axis of the pressure-difference-resistant sealing ring 4 is coincided with the revolving body axis of the hole sealing element 1, the pressure-difference-resistant sealing ring 4 is positioned in a first annular groove of the hole sealing element 1, the upper end of the pressure-difference-resistant sealing ring 4 is subjected to extrusion force of the lower end face of a second outer flange of the shaft hole sealing element 2, the hole sealing element 1, the shaft hole sealing element 2, the free movement sealing ring 3 and the pressure-difference-resistant sealing ring 4 form a fourth closed space, oil is filled in the fourth closed space, the lower end of the free movement sealing ring 3 is high-energy fuel, the upper end of the free movement sealing ring 3 is oil, the inner side of the pressure-difference-resistant sealing ring 4 is oil, and the outer side of the pressure-difference-resistant sealing ring 4 is air;

the coaxial positioning pins 5 are in the shape of a fifth torus, the fifth torus is a revolving body, and the number of the coaxial positioning pins 5 is four;

the axis of the revolving body of the coaxial positioning pin 5 is parallel to the axis of the revolving body of the hole sealing element 1, the lower end of the coaxial positioning pin 5 is positioned in the first round blind hole of the hole sealing element 1, and the upper end of the coaxial positioning pin 5 is positioned in the second round blind hole of the shaft hole sealing element 2;

the using method and the working principle of the invention are as follows:

the corrosion-resistant and leakage-proof device for realizing the isobaric stress state of the whole space through the free movement of the sealing ring comprises the following steps:

step 1: assembling the pressure-difference-resistant sealing ring 4 with the hole sealing element 1;

step 2: assembling the coaxial positioning pin 5 with the hole sealing element 1;

and step 3: assembling the free movement sealing ring 3 with the shaft hole sealing element 2;

and 4, step 4: filling oil into the fourth enclosed space;

and 5: assembling the shaft hole sealing element 2 and the hole sealing element 1;

step 6: and rotating the second screw to enable the upper end of the coaxial positioning pin 5 to enter the second round blind hole of the shaft hole sealing element 2, rotating the second screw clockwise by 30 degrees each time, and then rotating the next second screw clockwise until all the second screws are rotated to the right position.

The working principle of the invention is as follows:

single polytetrafluoroethylene sealing washer and rubber seal all are not applicable to the sealed of body detonation warhead mechanical interface, because rubber seal is corroded by high energy fuel, although polytetrafluoroethylene sealing washer is not corroded by high energy fuel, polytetrafluoroethylene elasticity is too poor, with mechanical interface laminating degree low, high energy fuel high temperature expansion produces the internal stress moreover, when polytetrafluoroethylene sealing washer one side internal stress is too big and the opposite side is atmospheric pressure, the high energy fuel of the too big one side of internal stress can spill over to atmospheric pressure one side, lead to leaking.

The free movement sealing ring 3 is a polytetrafluoroethylene sealing ring, the free movement sealing ring 3 is positioned in a radial sealing groove, the width of the sealing groove of the free movement sealing ring 3 is larger, the free movement sealing ring 3 can freely move up and down in the sealing groove, the lower end of the free movement sealing ring 3 is high-energy fuel, the upper end of the free movement sealing ring 3 is oil, and the oil is positioned in a sealing space. When the environmental temperature rises, the high-energy fuel expands as it is to generate internal stress, but the oil also expands to generate internal stress, although the internal stress of the high-energy fuel is not completely the same as the internal stress of the oil, the free movement sealing ring 3 can move freely, the free movement sealing ring 3 moves upwards to cause the space of the oil to be compressed, the internal stress of the oil can be increased, the free movement sealing ring 3 moves downwards to cause the space of the oil to be enlarged, the internal stress of the oil can be reduced, because the free movement sealing ring 3 can move freely up and down, therefore, the position of the free movement sealing ring 3 can be controlled through automatic pressure balance, the internal stresses of the oil at the upper end of the free movement sealing ring 3 and the liquid phase material at the lower end of the free movement sealing ring 3 are the same, the free movement sealing ring 3 is in a state of balanced up and down pressures, namely, all the spaces where the free movement sealing ring 3 are in an equal pressure state, and the internal stresses of the oil at the upper end and the liquid phase material at the lower end are the same, the oil at the upper end does not cross the power of the free movement sealing ring 3 to move downwards, and similarly, the liquid-phase material at the lower end does not cross the power of the free movement sealing ring 3 to move upwards, and the oil and the liquid-phase material are respectively positioned in independent spaces, so that sealing is realized.

As for the pressure-difference-resistant sealing ring 4, the material is rubber, one end is oil with large internal stress, the other end is atmospheric pressure, although there is a large pressure difference, the material of the pressure-difference-resistant sealing ring 4 is rubber, the rubber elasticity is good, the degree of adhesion with the sealing interface is high, the pressure-difference-resistant sealing ring 4 can seal the pressure difference of 10mpa originally, so the pressure-difference-resistant sealing ring 4 is not afraid of the pressure difference, that is, the invention transfers the huge pressure difference at two sides of the free-moving sealing ring 3 to the huge pressure difference at two sides of the pressure-difference-resistant sealing ring 4, and the pressure-difference-resistant sealing ring 4 is not afraid of the pressure difference at two sides, thereby realizing corrosion resistance and sealing.

The hole sealing element 1 and the shaft hole sealing element 2 are respectively an axle part and a hole part with sealed outer diameters, and the sealing ring is positioned between the two parts and is tightly attached to the two parts to realize sealing.

The number of the coaxial positioning pins 5 is four, the circumferential distribution axis of the coaxial positioning pins 5 is superposed with the axis of the circular hole of the hole sealing element 1, meanwhile, the circumferential distribution axis of the coaxial positioning pin 5 is superposed with the axis of the annular sealing groove of the shaft hole sealing element 2, the coaxial positioning pin 5 is in interference fit with the hole sealing element 1 and the shaft hole sealing element 2, therefore, the coaxial positioning pin 5 fixes the axial positions of the hole sealing element 1 and the shaft hole sealing element 2 at the same time, so that the axial positions of the hole sealing element 1 and the shaft hole sealing element 2 are coincident, so, the bottom surface of the ring direction seal groove that free motion sealing washer 3 was located just is coaxial with the round hole inner cylinder face of hole class sealing element 1, and the radial width in the space that free motion sealing washer 3 was located is equal everywhere, and free motion sealing washer 3 can all receive even compression by ring all for a week, is unlikely to that some positions receive serious compression and other some position compression is not enough and leads to leaking.

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 invention is not applicable, because the internal stress is larger, the pressure of the upper end and the lower end of the free movement sealing ring 3 is too large, the free movement sealing ring 3 is permanently deformed, and the elasticity is lost, so that the leakage is caused.

The second screw rotates clockwise for 30 degrees each time to move the sealing ring freely, and then rotates clockwise to the next second screw until all the second screws rotate to the position; the second screws are installed in such a way that the pressing force of all the second screws on the shaft hole sealing element 2 is uniform, and because the invention is afraid that part of the second screws have larger pressing force than the other part of the second screws, the shaft hole sealing element 2 is inclined, so that the space where the free movement sealing ring 3 is located cannot be circumferentially and everywhere in the same radial width, and the part is pressed too much, and the part is pressed insufficiently and leaks. Therefore, only all the second screws uniformly apply pre-tension to the shaft hole sealing element 2, so that the force applied to the shaft hole sealing element 2 is uniformly balanced. The reason that the second screw rotates the sealing washer of free motion 30 degrees clockwise at every turn is because if rotatory too much, the pretightning force increases too fast, can't accomplish the even balance of shaft hole seal element 2 atress, because if rotatory too little, too waste time, also no longer improve the even equilibrium of shaft hole seal element 2 atress, do not need.

When the ratio of the cross-sectional diameter of the compressed front shaft of the third ring body of the free movement sealing ring 3 to the width of the second annular groove of the shaft hole sealing element 2 is too small, the width of the second annular groove of the shaft hole sealing element 2 is too large, the storage space of oil is too large, when the pressure of the oil is adjusted through the displacement of the free movement sealing ring 3 at every time, the displacement of the free movement sealing ring 3 is required to be too large, the abrasion of the free movement sealing ring 3 is too large, once the free movement sealing ring 3 is abraded, the diameter of the free movement sealing ring 3 is reduced, and the leakage is caused. When the ratio of the diameter of the cross section of the compressed third circular ring body of the free movement sealing ring 3 to the width of the second annular groove of the shaft hole sealing element 2 is too large, the width of the second annular groove of the shaft hole sealing element 2 is too small, the movement range of the free movement sealing ring 3 is too narrow, and when the free movement sealing ring 3 does not move to increase the oil to the required pressure, the free movement sealing ring 3 is clamped by the sealing groove and cannot move continuously, so that the purpose of the invention cannot be realized.

Through partial theoretical calculation, the staff who has relevant working experience is summoned to consult the discussion collectively, and decompose the above problem, and each module carries out experimental evaluation alone, finally thinks, and the ratio of the third ring body of free movement sealing washer 3 axle section diameter before the compression and the second annular groove width of shaft hole sealing element 2 is 1: 5-6, 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 free-movement sealing ring 3 to the width of the second annular groove of the shaft hole sealing element 2 is 1: 6;

processing 10 pieces of the invention, filling high-energy fuel in the sealing ring, increasing the temperature from minus 50 ℃ to 80 ℃, storing for 5 days, then decreasing the temperature from 80 ℃ to minus 50 ℃, storing for 5 days, and reducing the temperature for 15 times in a circulating way, so that the high-energy fuel does not leak, opening the shaft hole sealing element 2, and finding that the oil on one side of the free movement sealing ring 3 does not flow to the high-energy fuel and the high-energy fuel on the other side of the free movement sealing ring 3 does not flow to the water. The invention proves to be effective.

The invention relates to a corrosion-resistant leakage-proof device for realizing a full-space isobaric stress state through free movement of a sealing ring, which has the following technical effects:

the polytetrafluoroethylene sealing ring can move up and down freely in the sealing groove, the internal stress of the high-energy fuel and the oil is improved along with the rise of the environmental temperature, although pressure difference exists, the polytetrafluoroethylene sealing ring moves up and down under the driving of the pressure difference, the internal stress of the oil is adjusted through adjusting the space of the oil, so that the internal stress of the high-energy fuel and the internal stress of the oil are equal, finally, the polytetrafluoroethylene sealing ring is in a full-space isobaric stress state, liquid-phase materials and the oil do not cross a power source of the polytetrafluoroethylene sealing ring, the liquid-phase materials and the oil are in respective spaces, and the polytetrafluoroethylene sealing ring achieves 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 free-movement sealing ring 3 to the width of the second annular groove of the shaft hole sealing element 2 is 1: 5;

processing 10 pieces of the invention, filling high-energy fuel in the sealing ring, increasing the temperature from minus 50 ℃ to 80 ℃, storing for 5 days, then decreasing the temperature from 80 ℃ to minus 50 ℃, storing for 5 days, and reducing the temperature for 15 times in a circulating way, so that the high-energy fuel does not leak, opening the shaft hole sealing element 2, and finding that the oil on one side of the free movement sealing ring 3 does not flow to the high-energy fuel and the high-energy fuel on the other side of the free movement sealing ring 3 does not flow to the water. The invention proves to be effective.

The invention relates to a corrosion-resistant leakage-proof device for realizing a full-space isobaric stress state through free movement of a sealing ring, which has the following technical effects:

the polytetrafluoroethylene sealing ring can move up and down freely in the sealing groove, the internal stress of the high-energy fuel and the oil is improved along with the rise of the environmental temperature, although pressure difference exists, the polytetrafluoroethylene sealing ring moves up and down under the driving of the pressure difference, the internal stress of the oil is adjusted through adjusting the space of the oil, so that the internal stress of the high-energy fuel and the internal stress of the oil are equal, finally, the polytetrafluoroethylene sealing ring is in a full-space isobaric stress state, liquid-phase materials and the oil do not cross a power source of the polytetrafluoroethylene sealing ring, the liquid-phase materials and the oil are in respective spaces, and the polytetrafluoroethylene sealing ring achieves a sealing effect.