CN116735097A - Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing - Google Patents
Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing Download PDFInfo
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- CN116735097A CN116735097A CN202310719770.0A CN202310719770A CN116735097A CN 116735097 A CN116735097 A CN 116735097A CN 202310719770 A CN202310719770 A CN 202310719770A CN 116735097 A CN116735097 A CN 116735097A
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- ring
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- inner ring
- annular
- clamp
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- 238000007789 sealing Methods 0.000 title claims abstract description 133
- 229920001971 elastomer Polymers 0.000 title claims abstract description 44
- 239000005060 rubber Substances 0.000 title claims abstract description 44
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 18
- 239000010439 graphite Substances 0.000 title claims abstract description 18
- 238000007689 inspection Methods 0.000 title claims description 6
- 238000004088 simulation Methods 0.000 claims abstract description 33
- 230000003068 static effect Effects 0.000 claims abstract description 19
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to an auxiliary sealing rubber ring air tightness test fixture in aviation graphite sealing, which comprises a simulation static ring, a simulation inner ring, a simulation outer ring, an inner ring clamp and an outer ring clamp, wherein the simulation static ring comprises an inner ring sleeve and an outer ring boss which are coaxially and integrally arranged, and the outer ring boss is fixedly arranged at the front end of the inner ring sleeve; the outer diameter and the inner diameter of the simulated inner ring are the same as the outer diameter and the inner diameter of the inner ring sleeve, the outer diameter of the simulated outer ring is the same as the outer diameter of the outer ring boss, the annular outer wall of the simulated inner ring is in clearance fit with the annular inner wall of the simulated outer ring, and a combination body with the same shape as the simulated stationary ring is formed after the simulated outer ring is sleeved with the simulated inner ring; the setting of the static ring is simulated, so that the air tightness of the tool can be checked; the arrangement of the simulated inner ring and the simulated outer ring can detect the air tightness of the auxiliary sealing rubber ring arranged between the simulated inner ring and the simulated outer ring.
Description
Technical Field
The invention relates to the technical field of engine mechanical seal inspection equipment, in particular to an auxiliary seal rubber ring air tightness inspection tool in aviation graphite seal and a working method thereof.
Background
In recent years, the aviation industry rapidly develops, and the requirements on the maneuverability and the reliability of an airplane are increasingly improved, so that the quality of each part of the aeroengine is urgently required to be improved so as to ensure the requirement on high performance of the aeroengine.
The graphite sealing device is also called end face sealing, belongs to mechanical sealing, and is an axial end face sealing device which achieves sealing by means of pretension of elastic elements on static and dynamic ring end face sealing pairs and compaction of medium pressure and elastic element pressure. On the premise that the pressure difference exists between the sealed fluid and the outside, the axial gap between the end faces of the sealing friction pair is reduced as much as possible by maintaining certain end face contact pressure, so that the leakage of the sealed fluid is reduced.
The end face of the sealing friction pair is a main sealing face, which is a key for determining the friction, abrasion and sealing performance of the mechanical seal, and also determines the service life of the mechanical seal; as long as the surface roughness and flatness of the main sealing surface can be guaranteed to meet the requirements, as long as the wear resistance of the material is good, the mechanical seal can reach little leakage.
As shown in fig. 1, the graphite seal device is composed of a graphite stationary ring assembly and a movable ring 64 (friction ring), wherein the stationary ring assembly includes: the outer ring 61, the inner ring 62 and the graphite ring 63, the auxiliary sealing rubber ring 6 is arranged between the inner wall of the outer ring 61 and the outer wall of the inner ring 62, the auxiliary sealing rubber ring 6 provides a part of elastic force to realize follow-up motion of sealing compensation, and meanwhile, a wave spring 65 acting along the axial direction is also arranged between the outer ring 61 and the inner ring 62 and used for automatic compensation and preventing liquid or gas from leaking from a relatively moving part of the sealing assembly.
Typical secondary sealing materials are synthetic rubber, with O-rings being the most commonly used secondary seal for end face seals. The rubber sizing material is selected according to the working temperature and the medium compatibility, and mainly comprises nitrile rubber, fluororubber and the like.
Studies have shown that: the size selection and compression control of the auxiliary sealing rubber ring influence the elasticity and tightness of the assembly. The auxiliary sealing rubber rings have three types: (1) internal expansion external compression D1< D1, D2> D2; (2) external profiling D1> D1, D2> D2; (3) the internal expansion type D1 is less than D1, D2 is less than D2 (wherein D1 is the outer diameter of the inner ring, D2 is the inner diameter of the outer ring, D1 is the inner diameter of the rubber ring, and D2 is the outer diameter of the rubber ring). The three rubber rings have different elasticity and sealing performance, so the sealing performance of the rubber rings must be qualified when different rubber rings are selected. How to simply and rapidly detect the airtight performance of the auxiliary sealing rubber ring before the auxiliary sealing rubber ring enters the graphite sealing device is a technical problem which needs to be solved by the technicians in the field.
Disclosure of Invention
The invention aims to solve the technical problem of providing a tool which has a simple structure and is easy to operate and is used for carrying out air tightness test on an auxiliary sealing rubber ring in aviation graphite sealing and a working method thereof.
In order to solve the technical problems, the auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing provided by the invention comprises the following components: the simulation static ring comprises an inner ring sleeve and an outer ring boss which are coaxially and integrally arranged, and the outer ring boss is fixedly arranged at the front end of the inner ring sleeve; the outer diameter and the inner diameter of the simulated inner ring are the same as the outer diameter and the inner diameter of the inner ring sleeve, the outer diameter of the simulated outer ring is the same as the outer diameter of the outer ring boss, the annular outer wall of the simulated inner ring is in clearance fit with the annular inner wall of the simulated outer ring, and a combination body with the same shape as the simulated stationary ring is formed after the simulated outer ring is sleeved with the simulated inner ring; the outer ring clamp comprises an annular barrel body and a barrel bottom which are integrally arranged, an annular step is arranged in the barrel body along the circumferential direction, the annular inner wall of the annular step is in clearance fit with the outer wall of the simulated outer ring/outer ring boss, and an outer ring clamp air pipe is arranged at the barrel bottom; the inner ring clamp is disc-shaped and comprises a columnar boss arranged at the axial center of the end face of the inner ring clamp and an annular sleeve arranged at the edge of the end face of the inner ring clamp, so that a cavity is formed between the columnar boss and the annular sleeve, and the inner ring clamp is provided with an inner ring clamp air pipe communicated with the cavity; the annular outer wall of the columnar boss is in clearance fit with the inner wall of the simulated inner ring/inner ring sleeve, and the outer wall of the annular sleeve is in clearance fit with the inner wall of the cylinder body of the outer ring clamp; when the tool is used, firstly, the air tightness of the tool is checked, and the tool comprises an outer ring boss simulating a static ring sleeved in an annular step of the outer ring clamp, wherein a third sealing ring for sealing is arranged on the inner wall of the annular step; the columnar boss of the inner ring clamp is sleeved in the tail end of the inner ring sleeve, and a fourth sealing ring for sealing is arranged on the outer wall of the columnar boss; the annular sleeve of the inner ring clamp is sleeved in the cylinder body of the outer ring clamp, a second sealing ring for sealing is arranged between the annular sleeve and the cylinder body, so that a cylindrical cavity is formed among the cylinder bottom of the outer ring clamp, the inner ring sleeve of the simulated stationary ring and the cylindrical boss of the inner ring clamp, and an annular cavity is formed among the annular cylinder body of the outer ring clamp, the outer side of the inner ring sleeve of the simulated stationary ring and the inner ring clamp; and after the air tightness of the tool is checked to be qualified, the auxiliary sealing rubber ring to be detected is arranged between the outer wall of the simulation inner ring and the inner wall of the simulation outer ring, and the combined body formed after the simulation outer ring and the simulation inner ring are sleeved replaces the simulation static ring, so that the air tightness check is performed on the auxiliary sealing rubber ring arranged between the simulation inner ring and the simulation outer ring.
Further, an annular groove is formed in the annular inner wall of the simulation outer ring along the circumferential direction and used for placing an auxiliary sealing rubber ring to be inspected.
Further, the annular outer wall of the columnar boss is provided with a first annular groove along the circumferential direction, and a fourth sealing ring is arranged in the first annular groove during assembly so as to enhance the sealing effect between the columnar boss and the simulated inner ring.
Further, the outer wall of the annular sleeve is provided with a second annular groove, and a second sealing ring is arranged in the second annular groove during assembly, so that the sealing effect between the inner ring clamp and the outer ring clamp is enhanced.
Further, a third annular groove is formed in the annular step along the circumferential direction, and a third sealing ring is arranged in the third annular groove during assembly, so that the sealing effect between the annular step and the simulated outer ring is enhanced.
Further, the edge of the inner ring clamp is further provided with a step portion, so that the step portion is used for limiting when the cylinder body of the outer ring clamp is in sleeve joint fit with the annular sleeve.
Further, a first through hole is formed in the inner ring clamp, the inner ring clamp air pipe penetrates through the first through hole, so that the front end of the inner ring clamp air pipe is arranged in the annular cavity, the tail end of the inner ring clamp air pipe is arranged outside the inner ring clamp, and a first sealing ring is arranged between the inner ring clamp air pipe and the inner ring clamp for sealing; the center of the cylinder bottom is provided with a second through hole which penetrates through, the outer ring clamp air pipe penetrates through the second through hole to enable the tail end of the outer ring clamp air pipe to be arranged in the cylindrical cavity, the front end of the outer ring clamp air pipe is arranged outside the outer ring clamp, and a fifth sealing ring is arranged between the outer ring clamp air pipe and the cylinder bottom for sealing.
Further, the outer wall of the annular sleeve is provided with a positioning blind hole, and the annular sleeve body is provided with a positioning insertion hole penetrating along the radial direction of the annular sleeve body, so that when the annular sleeve body is sleeved in the annular sleeve body, a positioning pin can be inserted into the positioning insertion hole and the positioning blind hole to position the inner ring clamp and the outer ring clamp.
Further, a plurality of mutually-disconnected bosses are arranged on the barrel bottom along the inner side of the annular step, so that when the simulated inner ring and the simulated outer ring are sleeved in the outer ring clamp, the ends of the simulated inner ring and the simulated outer ring are supported by the bosses, the ends of the simulated inner ring and the simulated outer ring are prevented from being directly contacted with the barrel bottom, the gap between the simulated inner ring, the simulated outer ring and the barrel bottom is increased, and when the auxiliary sealing rubber ring leaks air, the leaked air can rapidly circulate between the annular cavity and the barrel-shaped cavity to reach corresponding air pipes.
The working method of the auxiliary sealing rubber ring air tightness test tool comprises the following steps:
A. firstly, checking the air tightness of an inner ring clamp and an outer ring clamp by using a simulated static ring, sleeving an outer ring boss of the simulated static ring in an annular step of the outer ring clamp, and sealing by a third sealing ring; the columnar boss of the inner ring clamp is sleeved in the tail end of the inner ring sleeve and is sealed by a fourth sealing ring; the annular sleeve of the inner ring clamp is sleeved in the cylinder body of the outer ring clamp and is sealed by a second sealing ring; inserting a positioning pin into the positioning insertion hole and the positioning blind hole, and limiting and fixing the inner ring clamp and the outer ring clamp; a cylindrical cavity is formed among the bottom of the outer ring clamp, the inner ring sleeve of the simulated stationary ring and the cylindrical boss of the inner ring clamp, and an annular cavity is formed among the annular barrel of the outer ring clamp, the outer side of the inner ring sleeve of the simulated stationary ring and the inner ring clamp.
B. Introducing gas with certain pressure into the annular cavity through the inner ring clamp gas pipe, placing the outer ring clamp gas pipe below the water surface, observing whether bubbles emerge, and proving that the gas in the annular cavity cannot enter the cylindrical cavity if no bubbles emerge; and then the pressure of the gas introduced into the inner ring clamp gas pipe is removed, so that the pressure in the annular cavity is equal to the pressure outside the water surface, the inner ring clamp gas pipe is placed below the water surface, the outer ring clamp gas pipe is taken out from the water surface and then introduced with the gas with certain pressure, whether the gas bubbles in the inner ring clamp gas pipe below the water surface emerge or not is observed, the fact that the gas in the cylindrical cavity cannot enter the annular cavity is proved when no bubbles emerge, and the fact that the third sealing ring and the fourth sealing ring have good air tightness is achieved when no bubbles emerge twice.
C. And D, taking out the simulation static ring, placing the auxiliary sealing rubber ring to be tested in the annular groove of the simulation outer ring, replacing the simulation static ring with a combined body formed by sleeving the simulation outer ring and the simulation inner ring, and repeating the step B, wherein the step B is repeated for two times, and the air tightness of the auxiliary sealing rubber ring to be tested is good.
In the step B, when gas is introduced into the annular cavity through the inner ring clamp gas pipe, the fixed tool is placed below the water surface, and whether bubbles exist on the surface of the tool is observed; when gas is introduced into the cylindrical cavity through the outer ring clamp gas pipe, observing whether the surface of the tool has bubbles or not so as to check the air tightness of the first sealing ring, the second sealing ring and the fifth sealing ring; no bubbles emerge at two times, which indicates that the air tightness of the first sealing ring, the second sealing ring and the fifth sealing ring is good.
The invention has the technical effects that: (1) Compared with the prior art, the auxiliary sealing rubber ring air tightness test tool in aviation graphite sealing can test the air tightness of the tool by simulating the setting of a static ring; (2) The simulated inner ring and the simulated outer ring are arranged, so that the air tightness of the auxiliary sealing rubber ring arranged between the simulated inner ring and the simulated outer ring can be detected, and the simulated inner ring and the simulated outer ring are simple in structure and easy to assemble and operate; (3) The tool has the advantages of simple structure, low cost and rapid assembly, can be suitable for the air tightness detection of the sealing rubber rings of the inner expansion outer compression type, the inner expansion type and the outer compression type, and has wide application range.
Drawings
The invention is described in further detail below with reference to the drawings of the specification:
FIG. 1 is a schematic cross-sectional view of a graphite sealing device of the prior art;
FIG. 2 is a schematic cross-sectional view of the simulated inner ring, simulated outer ring, inner ring clamp and outer ring clamp of the present invention assembled;
FIG. 3 is a schematic cross-sectional view of an inner ring clamp of the present invention;
FIG. 4 is a schematic cross-sectional view of an outer ring clamp of the present invention;
fig. 5 is a schematic cross-sectional view of a simulated stationary ring of the present invention.
In the figure: the inner ring clamp 1, the columnar boss 11, the annular sleeve 12, the cavity 13, the first annular groove 14, the second annular groove 15, the positioning blind hole 16, the step 17, the annular cavity 18, the cylindrical cavity 19, the inner ring clamp air pipe 2, the outer ring clamp air pipe 3, the first sealing ring 31, the second sealing ring 32, the third sealing ring 33, the fourth sealing ring 34, the fifth sealing ring 35, the positioning pin 4, the simulated inner ring 5, the auxiliary sealing rubber ring 6, the outer ring 61, the inner ring 62, the graphite ring 63, the movable ring 64, the wave spring 65, the simulated stationary ring 7, the outer ring boss 71, the inner ring sleeve 72, the outer ring clamp 8, the annular step 81, the third annular groove 82, the positioning insertion hole 83, the cylinder 84, the cylinder bottom 85, the boss 86 and the simulated outer ring 9.
Detailed Description
Embodiment 1 as shown in fig. 2, the auxiliary sealing rubber ring air tightness test fixture in aviation graphite sealing of this embodiment comprises a simulation static ring 7, a simulation inner ring 5, a simulation outer ring 9, an inner ring clamp 1 and an outer ring clamp 8, wherein when the inner ring clamp 1 and the outer ring clamp 8 are matched with the simulation static ring 7 for use, the air tightness of the fixture is tested, and when the inner ring clamp 1 and the outer ring clamp 8 are matched with the simulation inner ring 5 and the simulation outer ring 9 for use, the auxiliary sealing rubber ring 6 arranged between the simulation inner ring 5 and the simulation outer ring 9 is tested for air tightness.
As shown in fig. 5, the simulated stationary ring 7 comprises an inner ring sleeve 72 and an outer ring boss 71 which are coaxially and integrally arranged, and the outer ring boss 71 is fixedly arranged at the front end of the inner ring sleeve 72; as shown in fig. 2, the outer diameter and the inner diameter of the simulated inner ring 5 are the same as the outer diameter and the inner diameter of the inner ring sleeve 72, the outer diameter of the simulated outer ring 9 is the same as the outer diameter of the outer ring boss 71, the annular outer wall of the simulated inner ring 5 is in clearance fit with the annular inner wall of the simulated outer ring 9, an annular groove is formed in the annular inner wall of the simulated outer ring 9 along the circumferential direction, and the auxiliary sealing rubber ring 6 to be inspected is arranged in the annular groove. The simulated outer ring 9 and the simulated inner ring 5 are sleeved to form a combination body with the same shape as the simulated stationary ring 7.
As shown in fig. 4, the outer ring clamp 8 comprises an integrally provided annular barrel 84 and a barrel bottom 85, an annular step 81 is provided in the barrel 84 in the circumferential direction, an annular inner wall of the annular step 81 is in clearance fit with an outer wall of the outer ring 9/outer ring boss 71, a third annular groove 82 is provided in the annular step 81 in the circumferential direction, and a third seal ring 33 for sealing is provided in the third annular groove 82. 2 mutually-disconnected bosses 86 are arranged on the barrel bottom 85 along the inner side of the annular step 81, so that when the simulated inner ring 5 and the simulated outer ring 9 are sleeved in the outer ring clamp 8, the ends of the simulated inner ring 5 and the simulated outer ring 9 are supported by the bosses 86, and the ends of the simulated inner ring 5 and the simulated outer ring 9 are prevented from being directly contacted with the barrel bottom 85.
As shown in fig. 3, the inner ring clamp 1 is disc-shaped, and comprises a columnar boss 11 arranged at the axial center of the end face of the inner ring clamp and an annular sleeve 12 arranged at the edge of the end face of the inner ring clamp, so that a cavity 13 is formed between the columnar boss 11 and the annular sleeve 12, the annular outer wall of the columnar boss 11 is in clearance fit with the inner wall of the simulated inner ring 5/inner ring sleeve 72, a first annular groove 14 is formed in the annular outer wall of the columnar boss 11 along the circumferential direction, and a fourth sealing ring 34 for sealing is arranged in the first annular groove 14; the outer wall of the annular sleeve 12 is in clearance fit with the inner wall of the barrel 84 of the outer ring clamp 8, the outer wall of the annular sleeve 12 is provided with a second annular groove 15, and a second sealing ring 32 for sealing is arranged in the second annular groove 15.
The edge of the inner ring clamp 1 is also provided with a step part 17, so that the step part 17 limits when the cylinder body 84 of the outer ring clamp 8 is in sleeve joint with the annular sleeve 12; the outer wall of the annular sleeve 12 is provided with a positioning blind hole 16, and the annular sleeve body 84 is provided with a positioning insertion hole 83 penetrating along the radial direction thereof, so that when the annular sleeve 12 is sleeved in the annular sleeve body 84, the positioning pin 4 can be inserted into the positioning insertion hole 83 and the positioning blind hole 16 to limit and fix the inner ring clamp 1 and the outer ring clamp 8; the locating pin 4 is in clearance fit with the locating blind hole 16 and the locating jack 83 by 0.1-0.2 mm, and is easy to install and disassemble.
The inner ring clamp 1 is provided with a first through hole which penetrates through, the inner ring clamp air pipe 2 penetrates through the first through hole, and a first sealing ring 31 is arranged between the inner ring clamp air pipe 2 and the inner ring clamp 1 for sealing; the center of the barrel bottom 85 is provided with a second through hole which penetrates through, the outer ring clamp air pipe 3 penetrates through the second through hole, and a fifth sealing ring 35 is arranged between the outer ring clamp air pipe 3 and the barrel bottom 85 for sealing.
The inner ring clamp 1 is in clearance fit with the simulated inner ring 5, the simulated inner ring 5 is in clearance fit with the simulated outer ring 9, and the simulated outer ring 9 is in clearance fit with the outer ring clamp 8 by 0.05-0.1 mm in the radial direction; the simulated inner ring 5 is axially matched with the inner ring clamp 1 and the outer ring clamp 8 by adopting a clearance of 0.1-0.2 mm so as to be convenient to install.
When the inner ring clamp 1 and the outer ring clamp 8 are matched with the simulated stationary ring 7 for use, the outer ring boss 71 of the simulated stationary ring 7 is sleeved in the annular step 81 of the outer ring clamp 8, the columnar boss 11 of the inner ring clamp 1 is sleeved in the tail end of the inner ring sleeve 72, the annular sleeve 12 of the inner ring clamp 1 is sleeved in the barrel 84 of the outer ring clamp 8, a cylindrical cavity 19 is formed among the barrel bottom 85 of the outer ring clamp 8, the inner ring sleeve 72 of the simulated stationary ring 7 and the columnar boss 11 of the inner ring clamp 1, and an annular cavity 18 is formed among the annular barrel 84 of the outer ring clamp 8, the outer ring sleeve 72 of the simulated stationary ring 7 and the inner ring clamp 1; the front end of the inner ring clamp air pipe 2 is arranged in the annular cavity 18, the tail end of the inner ring clamp air pipe 2 is arranged outside the inner ring clamp 1, the tail end of the outer ring clamp air pipe 3 is arranged in the cylindrical cavity 19, and the front end of the outer ring clamp air pipe 3 is arranged outside the outer ring clamp 8.
When the inner ring clamp 1 and the outer ring clamp 8 are matched with the simulated inner ring 5 and the simulated outer ring 9 for use, the simulated outer ring 9 is sleeved in an annular step 81 of the outer ring clamp 8, the front end of the simulated inner ring 5 is sleeved in the simulated outer ring 9, an annular groove of the simulated outer ring 9 is used for placing an auxiliary sealing rubber ring 6 to be detected between the simulated outer ring 9 and the simulated inner ring 5, a cylindrical boss 11 of the inner ring clamp 1 is sleeved in the tail end of the simulated inner ring 5, an annular sleeve 12 of the inner ring clamp 1 is sleeved in a cylinder body 84 of the outer ring clamp 8, a cylindrical cavity 19 is formed among the cylindrical boss 11 of the inner ring clamp 1, the inner wall of the simulated inner ring 5 and a cylinder bottom 85 of the outer ring clamp 8, and the cylindrical cavity 19 is also communicated with the outer side of the cylinder bottom 85 through an outer ring clamp air pipe 3; an annular cavity 18 is formed among the outer wall of the simulated inner ring 5, the inner wall of the barrel 84 and the inner ring clamp 1, and the annular cavity 18 is also communicated with the outer side of the inner ring clamp 1 through the inner ring clamp air pipe 2.
Example 1
The working method of the auxiliary sealing rubber ring air tightness test tool in aviation graphite sealing in embodiment 1 comprises the following steps:
A. firstly, using a simulated static ring to test the air tightness of an inner ring clamp 1 and an outer ring clamp 8, sleeving an outer ring boss 71 of the simulated static ring 7 in an annular step 81 of the outer ring clamp, and sealing by a third sealing ring 33; the columnar boss 11 of the inner ring clamp 1 is sleeved in the tail end of the inner ring sleeve 72 and is sealed by the fourth sealing ring 34; the annular sleeve 12 of the inner ring clamp 1 is sleeved in the barrel 84 of the outer ring clamp 8 and is sealed by the second sealing ring 32; inserting the positioning pin 4 into the positioning insertion hole 83 and the positioning blind hole 16, and limiting and fixing the inner ring clamp 1 and the outer ring clamp 8; a cylindrical cavity 19 is formed among the barrel bottom 85 of the outer ring clamp 8, the inner ring sleeve 72 of the simulated stationary ring 7 and the cylindrical boss 11 of the inner ring clamp 1, and an annular cavity 18 is formed among the annular barrel 84 of the outer ring clamp 8, the outer side of the inner ring sleeve 72 of the simulated stationary ring 7 and the inner ring clamp 1.
B. Introducing air flow with the pressure of 0.5Mpa into the annular cavity 18 through the inner ring clamp air pipe 2, placing the outer ring clamp air pipe 3 below the water surface, observing for 1 minute, checking whether air bubbles are emitted, and proving that the air in the annular cavity 18 cannot enter the cylindrical cavity 19 through the third sealing ring 33 and the fourth sealing ring 34 when the air bubbles are not emitted; and then the air flow introduced into the inner ring clamp air pipe 2 is removed, so that the air pressure in the annular cavity 18 is equal to the pressure outside the water surface, the inner ring clamp air pipe 2 is placed below the water surface, the outer ring clamp air pipe 3 is taken out of the water surface, then the air flow with the pressure of 0.5MPa is introduced, the observation is carried out for 1 minute, whether the air flow of the inner ring clamp air pipe 2 placed below the water surface is emitted or not is checked, the fact that the air in the cylindrical cavity 19 cannot enter the annular cavity 18 through the third sealing ring 33 and the fourth sealing ring 34 is proved when no air flow is emitted, and the air tightness of the third sealing ring 33 and the fourth sealing ring 34 is good when no air flow is emitted at two times.
C. Taking out the simulation static ring 7, putting the auxiliary sealing rubber ring 6 to be tested in the annular groove of the simulation outer ring 9, sleeving the simulation outer ring 9 and the simulation inner ring 5 to form a combined body to replace the simulation static ring 7, repeating the step B, wherein the gas in the annular cavity 18 can not pass through the third sealing ring 33, the fourth sealing ring 34 and the auxiliary sealing rubber ring 6, and the gas in the cylindrical cavity 19 can not pass through the third sealing ring 33, the fourth sealing ring 34 and the auxiliary sealing rubber ring 6, so that the air tightness of the auxiliary sealing rubber ring 6 to be tested is good; if bubbles are generated, the air tightness of the third seal ring 33 and the fourth seal ring 34 is checked in step B, and it can be determined that the air tightness of the auxiliary seal ring 6 is not satisfactory.
In order to check the air tightness of the first sealing ring, the second sealing ring and the fifth sealing ring, and avoid the influence of the air tightness of the sealing rings on the detection efficiency, in the step B, after the air flow of 0.5MPa is introduced into the annular cavity through the inner ring clamp air pipe, the fixed tool is placed below the water surface, only the tail end of the inner ring clamp air pipe is kept above the water surface, the observation is carried out for 1 minute, whether air bubbles are emitted from the connection part of the inner ring clamp air pipe 2 and the inner ring clamp 1, the connection part of the outer ring clamp air pipe 3 and the outer ring clamp 8, and the connection part of the outer ring clamp 8 and the inner ring clamp 1, if no air bubbles are emitted, the air flow introduced into the inner ring clamp air pipe 2 is removed, the air pressure in the annular cavity 18 is equal to the pressure outside the water surface, the outer ring clamp air pipe 3 is taken out from the water surface, the tool is placed below the water surface, the front end of the outer ring clamp air pipe 3 is kept above the water surface, the air flow of 0.5MPa is introduced into the cylindrical cavity from the front end of the outer ring clamp air pipe 3, the observation is carried out for 1 minute, whether the connection part of the inner ring clamp air pipe 2 and the inner ring clamp air pipe 1, the connection part of the outer ring clamp air pipe 3 and the inner ring clamp air pipe 8 and the outer ring clamp 1 are connected with the second sealing ring 35, and the air sealing ring 35 is operated for the fifth operation, and no air bubbles are formed, and the second operation is performed, and the air tightness is described. The deviation of the detection result caused by the air leakage of the first sealing ring 31, the second sealing ring 32 and the fifth sealing ring 35 can be effectively avoided.
The working method of the tool is suitable for checking the air tightness of the sealing rubber rings of the inner expansion outer compression type, the inner expansion outer compression type and the outer compression type.
It is apparent that the above examples are merely illustrative of the present invention and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious changes and modifications which come within the spirit of the invention are desired to be protected.
Claims (4)
1. Auxiliary seal rubber ring gas tightness inspection frock in aviation graphite seals, its characterized in that includes: the simulation static ring comprises an inner ring sleeve and an outer ring boss which are coaxially and integrally arranged, and the outer ring boss is fixedly arranged at the front end of the inner ring sleeve; the outer diameter and the inner diameter of the simulated inner ring are the same as the outer diameter and the inner diameter of the inner ring sleeve, the outer diameter of the simulated outer ring is the same as the outer diameter of the outer ring boss, the annular outer wall of the simulated inner ring is in clearance fit with the annular inner wall of the simulated outer ring, and a combination body with the same shape as the simulated stationary ring is formed after the simulated outer ring is sleeved with the simulated inner ring; the outer ring clamp comprises an annular barrel body and a barrel bottom which are integrally arranged, an annular step is arranged in the barrel body along the circumferential direction, the annular inner wall of the annular step is in clearance fit with the outer wall of the simulated outer ring/outer ring boss, and an outer ring clamp air pipe is arranged at the barrel bottom; the inner ring clamp is disc-shaped and comprises a columnar boss arranged at the axial center of the end face of the inner ring clamp and an annular sleeve arranged at the edge of the end face of the inner ring clamp, so that a cavity is formed between the columnar boss and the annular sleeve, and the inner ring clamp is provided with an inner ring clamp air pipe communicated with the cavity; the annular outer wall of the columnar boss is in clearance fit with the inner wall of the simulated inner ring/inner ring sleeve, and the outer wall of the annular sleeve is in clearance fit with the inner wall of the cylinder body of the outer ring clamp;
the annular inner wall of the simulation outer ring is provided with an annular groove along the circumferential direction;
the inner ring clamp is provided with a first through hole which penetrates through the inner ring clamp, so that the front end of the inner ring clamp is arranged in the annular cavity, the tail end of the inner ring clamp is arranged outside the inner ring clamp, and a first sealing ring is arranged between the inner ring clamp and the inner ring clamp for sealing; the center of the cylinder bottom is provided with a second through hole which penetrates through, the outer ring clamp air pipe penetrates through the second through hole to enable the tail end of the outer ring clamp air pipe to be arranged in the cylindrical cavity, the front end of the outer ring clamp air pipe is arranged outside the outer ring clamp, and a fifth sealing ring is arranged between the outer ring clamp air pipe and the cylinder bottom for sealing.
2. The tooling for inspecting the tightness of the auxiliary sealing rubber ring in aviation graphite sealing according to claim 1, wherein a first annular groove is formed in the circumferential direction of the annular outer wall of the columnar boss, a second annular groove is formed in the outer wall of the annular sleeve, and a third annular groove is formed in the circumferential direction of the annular step.
3. The tooling for inspecting the tightness of the auxiliary sealing rubber ring in aviation graphite sealing according to claim 2, wherein a positioning blind hole is formed in the outer wall of the annular sleeve, and a positioning insertion hole penetrating through the annular sleeve body is formed in the radial direction of the annular sleeve body.
4. The tool for inspecting the air tightness of the auxiliary sealing rubber ring in aviation graphite sealing according to claim 3, wherein a plurality of mutually disconnected bosses are arranged on the cylinder bottom along the inner side of the annular step, so that when the simulated inner ring and the simulated outer ring are sleeved in the outer ring clamp, the ends of the simulated inner ring and the simulated outer ring are supported by the bosses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310719770.0A CN116735097A (en) | 2017-06-27 | 2017-06-27 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710498491.0A CN109141763B (en) | 2017-06-27 | 2017-06-27 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing |
| CN202310719770.0A CN116735097A (en) | 2017-06-27 | 2017-06-27 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710498491.0A Division CN109141763B (en) | 2017-06-27 | 2017-06-27 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing |
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| CN116735097A true CN116735097A (en) | 2023-09-12 |
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| CN202310719770.0A Pending CN116735097A (en) | 2017-06-27 | 2017-06-27 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing |
| CN202310719769.8A Pending CN116754140A (en) | 2017-06-27 | 2017-06-27 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing and working method thereof |
| CN201710498491.0A Active CN109141763B (en) | 2017-06-27 | 2017-06-27 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing |
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| CN202310719769.8A Pending CN116754140A (en) | 2017-06-27 | 2017-06-27 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing and working method thereof |
| CN201710498491.0A Active CN109141763B (en) | 2017-06-27 | 2017-06-27 | Auxiliary sealing rubber ring air tightness inspection tool in aviation graphite sealing |
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| CN112360795B (en) * | 2019-07-12 | 2022-05-27 | 中国航发常州兰翔机械有限责任公司 | Easy-to-operate static lubricating oil sealing test device for front section of axial flow compressor |
| CN110555288B (en) * | 2019-09-25 | 2023-04-18 | 中国石油大学(华东) | Method and system for determining axial load of graphite packing ring for static coupling seal |
| CN113884244A (en) * | 2021-09-18 | 2022-01-04 | 西安远航真空钎焊技术有限公司 | Machining method of cyclone chamber |
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| CN201173295Y (en) * | 2007-11-15 | 2008-12-31 | 四川新川航空仪器有限责任公司 | Contact type mechanical end-face leakage-free magnetic sealing member |
| JP5530808B2 (en) * | 2010-06-01 | 2014-06-25 | 日本ピラー工業株式会社 | mechanical seal |
| CN202719140U (en) * | 2012-06-29 | 2013-02-06 | 爱思开实业（汕头）聚苯树脂有限公司 | Mechanical sealing device |
| CN103091046B (en) * | 2012-11-13 | 2016-01-27 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of motor graphite end face seal device seal test jig |
| CN103900768B (en) * | 2014-04-11 | 2017-03-01 | 苏州纽威阀门股份有限公司 | A kind of multifunctional containment circle leakage detection apparatus |
| CN106124176B (en) * | 2016-06-28 | 2019-03-05 | 中国南方航空工业(集团)有限公司 | For detecting and adjusting the tooling and installation method of magnetic sealing device |
| CN106762798B (en) * | 2016-12-21 | 2022-09-09 | 张军 | Mechanical seal special for oil-gas mixed transportation pump |
| CN207351623U (en) * | 2017-06-27 | 2018-05-11 | 中国航发常州兰翔机械有限责任公司 | Auxiliary seal cushion rubber air tight test frock in a kind of aviation graphite grazing |
-
2017
- 2017-06-27 CN CN202310719770.0A patent/CN116735097A/en active Pending
- 2017-06-27 CN CN202310719769.8A patent/CN116754140A/en active Pending
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| CN116754140A (en) | 2023-09-15 |
| CN109141763A (en) | 2019-01-04 |
| CN109141763B (en) | 2023-07-18 |
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