CN114382609A - Reciprocating high-low pressure self-adaptive compensation sealing device - Google Patents
Reciprocating high-low pressure self-adaptive compensation sealing device Download PDFInfo
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- CN114382609A CN114382609A CN202111517656.7A CN202111517656A CN114382609A CN 114382609 A CN114382609 A CN 114382609A CN 202111517656 A CN202111517656 A CN 202111517656A CN 114382609 A CN114382609 A CN 114382609A
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- 238000007789 sealing Methods 0.000 title claims abstract description 240
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 210000004907 gland Anatomy 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 6
- 230000009471 action Effects 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 5
- 239000004820 Pressure-sensitive adhesive Substances 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000007246 mechanism Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F11/00—Arrangements of sealings in combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F11/00—Arrangements of sealings in combustion engines
- F02F11/002—Arrangements of sealings in combustion engines involving cylinder heads
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a reciprocating high-low pressure self-adaptive compensation sealing device, which comprises a double-ring sealing structure arranged between a rotary engine cylinder cover and a cylinder sleeve, wherein high-pressure oil exists between an end cover and a gland of an engine; the double-ring sealing structure comprises an outer sealing ring, an inner sealing ring, a pressure ring and a rolling body, wherein the outer sealing ring and the inner sealing ring form a sliding pair through inclined planes; the lower end inner edge opening of the inner sealing ring is positioned at the upper end of the cylinder sleeve, the pressing ring is arranged between the inner sealing ring and the pressing cover, and the rolling body is arranged between the lower end outer edge opening of the inner sealing ring and the pressing ring; the rolling body is used as a fulcrum of deformation of the inner sealing ring, and simultaneously, axial displacement of the inner sealing ring is limited; the high-pressure oil enables the outer sealing ring and the inner sealing ring to recover deformation. The working condition of the air cylinder is changed along with the pressure in the air cylinder, so that the effects of reducing friction loss and enhancing the sealing performance are achieved. Therefore, the pressure-sensitive adhesive has many advantages such as a simple sealing structure and good pressure adaptability.
Description
Technical Field
The invention relates to the field of sealing, in particular to the field of dynamic sealing, and discloses a reciprocating high-low pressure self-adaptive compensation sealing device.
Background
In recent years, with the development of production and the progress of science and technology, higher requirements are put forward on sealing in the fields of aerospace, petrochemical industry, electric power, engines and the like. The leakage is mainly caused by two reasons: firstly, as a result of machining, various defects, shape and size deviations inevitably exist on the surface of a mechanical product, and a gap is inevitably generated at the joint of mechanical parts; secondly, the pressure difference exists between the two sealed sides, and the working medium can leak through the gap. The leakage problem not only causes low efficiency of mechanical equipment, increased energy consumption and reduced safety performance, but also causes serious environmental pollution. Therefore, how to inhibit leakage and ensure production safety is an urgent problem to be solved in the mechanical industry.
At present, dynamic seals are widely used in engineering, and mainly include two types, i.e., a reciprocating seal mechanism and a rotary seal mechanism. The reciprocating type sealing mechanism mainly comprises an extrusion seal and a lip seal, is realized by mainly depending on a sealing ring, plays a role in pre-sealing through the rebound force of the sealing ring, and transmits fluid pressure to a contact surface to form contact stress distribution to play a role in sealing. The development of the reciprocating sealing mechanism enhances the safety of production and manufacture, improves the efficiency of mechanical equipment, and plays an irreplaceable role in industrial production and manufacture.
However, in many mechanical devices, leakage remains one of the major factors affecting their performance, and reciprocating sealing mechanisms still have many limitations in many mechanical devices. The sealing under the complex working conditions of high temperature, high pressure and the like, such as the sealing of a rotor engine and a Duke engine, still has the problems of complex structure, leakage failure, short service life and the like. Therefore, the innovative research of the dynamic sealing mechanism with long service life, simple structure and high efficiency has important theoretical significance and engineering application value.
Disclosure of Invention
In view of the above-mentioned defects or shortcomings in the prior art, the present invention provides a reciprocating high-low pressure adaptive compensation sealing device with simple sealing structure, good pressure adaptability, high efficiency and reliability.
In order to solve the sealing problem of the rotary engine, the invention provides a reciprocating high-low pressure self-adaptive compensation sealing device, which comprises a double-ring sealing structure arranged in a rotary engine cylinder gland and positioned between a cylinder cover and a cylinder sleeve, wherein high-pressure oil exists between an end cover and the gland of the rotary engine; the double-ring sealing structure comprises an outer sealing ring, an inner sealing ring, a pressure ring and a rolling body, wherein the upper parts of the outer sealing ring and the inner sealing ring are tightly attached, and the sealing surface at the attachment part is an inclined plane; the lower end inner edge opening of the inner sealing ring is positioned at the upper end of the cylinder sleeve, the pressing ring is arranged between the inner sealing ring and the pressing cover, and the rolling body is arranged between the lower end outer edge opening of the inner sealing ring and the pressing ring; when the inner sealing ring is acted by the pressure of gas in the cylinder, the rolling body is used as a fulcrum of deformation of the inner sealing ring, and the axial displacement of the inner sealing ring is limited; the high-pressure oil enables the outer sealing ring and the inner sealing ring to recover deformation.
Further, the reciprocating type high-low pressure self-adaptive compensation sealing device of the invention comprises:
the outer sealing ring and the inner sealing ring can rotate relative to the cylinder cover, and deformation compensation can be generated according to working condition pressure change, so that the pressure of a sealing surface changes, friction loss is reduced, and the sealing effect is improved.
Under different working condition pressures, the clearance between the inner sealing ring and the cylinder cover is different, the pressure of the sealing surface between the outer sealing ring and the cylinder cover is different, and an oil film can be formed all the time.
When the gas pressure in the cylinder is greater than the high-pressure oil pressure, the inner sealing ring deforms under the action of the gas pressure in the cylinder, the radial diameter of the inner sealing ring is increased, the feeding amount is generated along the axial direction, and the gap between the inner sealing ring and the cylinder cover is compensated, so that the gas in the cylinder is prevented from escaping; the inner sealing ring is used for preventing high-temperature gas in the cylinder from directly contacting the outer sealing ring, so that the outer sealing ring is protected; meanwhile, the outer sealing ring deforms under the action of the inner sealing ring, so that the pressure between the outer sealing ring and the cylinder cover is increased, and the sealing performance is enhanced.
When the gas pressure in the cylinder is smaller than the high-pressure oil pressure, the outer sealing ring is acted by the high-pressure oil, the force of the high-pressure oil is acted on the inner sealing ring through the inclined plane, the inner sealing ring recovers deformation, a gap is formed between the inner sealing ring and the cylinder cover, and the friction loss is reduced; the pressure between the inner sealing ring and the cylinder cover is reduced; an oil film is formed between the outer sealing ring and the cylinder cover, so that gas can be prevented from escaping, and high-pressure oil is prevented from entering the cylinder.
Compared with the prior art, the invention has the beneficial effects that:
the reciprocating high-low pressure self-adaptive compensation sealing device of the invention takes the double rings as the main body of the sealing mechanism, not only can rotate around the main shaft along with the cylinder body, but also has different working states under the action of different pressures, and can change the working condition of the sealing mechanism through deformation, namely the working condition changes along with the pressure in the cylinder, thereby playing the roles of reducing friction loss and strengthening sealing performance. Therefore, the sealing device has the advantages of simple structure, quick response, long service life, good adaptability, small friction loss, good sealing effect and the like.
Drawings
FIG. 1 is a schematic diagram of a reciprocating high-low pressure self-adaptive compensation sealing device of the invention;
FIG. 2 is a schematic diagram of the operation of the reciprocating high-low pressure adaptive compensating sealing device shown in FIG. 1;
FIG. 3 is a schematic view of a sealing structure of the reciprocating high-low pressure adaptive compensation sealing device shown in FIG. 1;
in the figure: 1-shell, 2-oil inlet nozzle ring, 3-end cover, 4-oil outlet nozzle ring, 5-gland, 6-outer sealing ring, 601-ring groove, 602-through hole, 7-inner sealing ring, 701-first groove, 702-second groove, 8-cylinder cover, 9-compression ring, 10-rolling body, 11-cylinder sleeve, 12-cylinder block and 13-piston.
Detailed Description
The design concept of the invention is that a reciprocating high-low pressure self-adaptive compensation sealing device which is consistent with the movement mode of a rotary engine is designed according to the special working mode of the rotary engine. As shown in fig. 1 and 3c), when the engine is in different working strokes, the inner sealing ring 7 and the outer sealing ring 6 in the sealing device have different working conditions, so that the friction loss is reduced, and the sealing performance is enhanced. The inner sealing ring 7 deforms under the action of the internal pressure of the cylinder, compensation feeding amount is generated along the axial direction of the cylinder, and a gap between the inner sealing ring 7 and the cylinder cover 8 is compensated to prevent gas in the cylinder from escaping; meanwhile, the inner sealing ring 7 can prevent high-temperature gas in the cylinder from directly contacting the outer sealing ring 6 to protect the outer sealing ring 6; when the gas pressure in the cylinder is smaller than the high-pressure oil pressure, the inner sealing ring 7 is restored and deformed under the action of the high-pressure oil, a gap is generated between the inner sealing ring 7 and the cylinder cover 8, and the friction loss is reduced. The outer sealing ring 6 deforms under the pressure action of the inner sealing ring 7, the pressure between the outer sealing ring 6 and the cylinder cover 8 is increased, the thickness of an oil film is reduced, and the sealing performance is enhanced; when the gas pressure in the cylinder is smaller than the high-pressure oil pressure, the outer sealing ring 6 is acted by the high-pressure oil, and the force of the high-pressure oil is acted on the inner sealing ring 7 through the inclined plane; meanwhile, an oil film between the outer sealing ring 6 and the cylinder cover 8 can prevent gas from escaping and prevent high-pressure oil from entering the cylinder. By providing the pressing ring 9 and the rolling elements 10 between the inner seal ring 7 and the engine cover 5, when the inner seal ring 7 is subjected to the in-cylinder pressure, the rolling elements 10 serve as fulcrums at which the inner seal ring 7 deforms, so that the deformation is more likely to occur, and the axial displacement of the inner seal ring 7 is restricted, thereby preventing the inner seal ring 7 from coming off the cylinder liner 11. Therefore, the pressure self-adaptive device has the advantages of simple structure, good pressure self-adaptability, high efficiency, reliability and the like.
The features and objects of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings and examples, it being understood that the specific embodiments described herein are illustrative of the invention only and are not limiting. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings. In addition, it is to be emphasized that: in the case of conflict, the embodiments and features of the embodiments in the present application may be combined with each other.
As shown in figure 1, the reciprocating high-low pressure self-adaptive compensation sealing device provided by the invention is suitable for a special working mode of a rotary engine, and high-pressure oil exists between an end cover 3 and a gland 5 of the rotary engine. The sealing device is arranged in the cylinder gland 5 and is provided with a double-ring sealing structure between a cylinder cover 8 and a cylinder sleeve 11, the cylinder cover 8 is fixedly connected with an end cover 3, and the cylinder sleeve 11 is fixedly connected with a cylinder body 12. The double-ring sealing structure comprises an outer sealing ring 6, an inner sealing ring 7, a pressure ring 9 and a rolling body 10, wherein the upper parts of the outer sealing ring 6 and the inner sealing ring 7 are tightly attached, and the sealing surface at the attachment part is an inclined plane, namely the outer sealing ring 6 and the inner sealing ring 7 form a sliding pair through the inclined plane; the lower end inner edge opening of the inner sealing ring 7 is located at the upper end of the cylinder sleeve 11, the pressing ring 9 is arranged between the inner sealing ring 7 and the pressing cover 5, the rolling body 10 is located between the lower end outer edge opening of the inner sealing ring 7 and the pressing ring 9, the outer sealing ring 6 and the inner sealing ring 7 can rotate relative to the cylinder cover 8, deformation compensation can be generated according to working condition pressure changes, the pressure of a sealing surface is changed, friction loss is reduced, and the sealing effect is improved. During the operation of the engine, the outer sealing ring 6 and the cylinder cover 8 can generate relative rotation. Relative rotation can occur between the cylinder block 12 and the engine housing 1, and high pressure oil exists between the end cover 3 and the inner seal ring 7 and circulates through the inlet ring 4 and the outlet ring 2. When the inner sealing ring 7 is under the action of the pressure of gas in the cylinder, the rolling body 10 arranged between the outer edge opening at the lower end of the inner sealing ring 7 and the pressing ring 9 is used as a fulcrum for deformation of the inner sealing ring 7, so that the inner sealing ring 7 is more easily deformed, the axial displacement of the inner sealing ring 7 is limited, a gap is prevented from being generated between the inner sealing ring 7 and the cylinder sleeve 11 due to axial force, and a gap is prevented from being generated between the inner sealing ring 7 and the cylinder sleeve 11 due to axial force. The reciprocating motion of the piston 13 drives the engine to do work.
According to the sealing device, under different working condition pressures, the gap amount between the inner sealing ring 7 and the cylinder cover 8 is different, the sealing surface pressure between the outer sealing ring 6 and the cylinder cover 8 is different, and an oil film can be formed all the time.
When the gas pressure in the cylinder is greater than the high-pressure oil pressure, the inner sealing ring 7 deforms under the action of the gas pressure in the cylinder, the radial diameter of the inner sealing ring 7 is increased, the feeding amount is generated along the axial direction, and the gap between the inner sealing ring 7 and the cylinder cover 8 is compensated, so that the gas in the cylinder is prevented from escaping; the inner sealing ring 7 is used for preventing high-temperature gas in the cylinder from directly contacting the outer sealing ring 6, so that the outer sealing ring 6 is protected; meanwhile, the outer sealing ring 6 is deformed by the action force of the inner sealing ring 7, so that the pressure between the outer sealing ring 6 and the cylinder cover 8 is increased, and the sealing performance is enhanced.
When the gas pressure in the cylinder is smaller than the high-pressure oil pressure, the outer sealing ring 6 is acted by the high-pressure oil, the force of the high-pressure oil is acted on the inner sealing ring 7 through the inclined plane, the inner sealing ring 7 recovers to deform, a gap is formed between the inner sealing ring 7 and the cylinder cover 8, and the friction loss is reduced; the pressure between the inner sealing ring 7 and the cylinder cover 8 is reduced; an oil film is formed between the outer sealing ring 6 and the cylinder cover 8, so that gas can be prevented from escaping, and high-pressure oil can be prevented from entering the cylinder.
In the invention, the compression ring 5 and the rolling body 10 have the functions that when the inner sealing ring 7 is acted by the gas pressure in the cylinder, the rolling body 10 is used as a fulcrum for deformation of the inner sealing ring 7, so that the inner sealing ring 7 is easier to deform, and the axial displacement of the inner sealing ring is limited, thereby preventing the inner sealing ring from being separated from the cylinder sleeve.
When the engine is in different working strokes and the pressure in the cylinder is different, the outer sealing ring 6 and the inner sealing ring 7 are in different working conditions, so that the effects of reducing friction loss and strengthening sealing performance are achieved. As shown in a) of fig. 2, in the intake stroke, the cylinder interior gas pressure is lower than the high oil pressure. The outer sealing ring 6 is deformed under the action of high-pressure oil, and the pressure between the outer sealing ring and the cylinder cover 8 is reduced. Meanwhile, high-pressure oil acting force is applied to the inner sealing ring 7 through the inclined plane, so that a gap is formed between the inner sealing ring 7 and the cylinder cover 8, and friction loss is reduced; as shown in b) in fig. 2, the cylinder interior gas pressure gradually increases in the compression stroke. The inner sealing ring 7 deforms under the action of gas pressure, the radial diameter is increased, the axial feeding amount is generated, and the gap between the inner sealing ring 7 and the cylinder cover 8 is gradually reduced. The outer sealing ring 6 is deformed under the action of the inner sealing ring 7, the pressure between the outer sealing ring 6 and the cylinder cover 8 is increased, and the sealing capacity between the outer sealing ring 6 and the cylinder cover 8 is enhanced; as shown in c) of fig. 2, in the power stroke, the gas in the cylinder expands to do work, and the pressure in the cylinder is greater than the pressure of the high-pressure oil. The inner sealing ring 7 is acted by gas expansion force to generate feed amount along the axial direction, the gap between the inner sealing ring 7 and the cylinder cover 8 disappears, gas is prevented from escaping, and meanwhile, the outer sealing ring 6 is protected from being acted by high-temperature gas. The inner sealing ring 7 generates acting force on the outer sealing ring 6 along the inclined plane, the pressure between the outer sealing ring 6 and the cylinder cover 8 is increased, and the sealing capacity between the outer sealing ring 6 and the cylinder cover 8 is enhanced; as shown in d) of fig. 2, in the exhaust stroke, the cylinder interior gas is exhausted, and the cylinder interior gas pressure is lower than the high-pressure oil pressure. The outer sealing ring 6 is restored and deformed under the action of high-pressure oil, and the pressure between the outer sealing ring and the cylinder cover 8 is reduced. The inner sealing ring 7 is deformed along the axial direction under the action of the outer sealing ring 6 and high-pressure oil pressure, a gap is formed between the inner sealing ring and the cylinder cover 8, and friction loss is reduced. Meanwhile, the rolling bodies 10 serve as fulcrums for deformation of the inner seal ring 7, so that the inner seal ring 7 is more easily deformed, and the axial displacement of the inner seal ring 7 is limited, so that the inner seal ring 7 is prevented from being disengaged from the cylinder sleeve 11.
In the invention, the outer sealing ring 6 is formed by pressing high-temperature resistant non-metallic materials such as ceramic fiber and the like, and has good compression resilience; the outer sealing ring 6 is provided with the ring groove 601, so that an oil film is formed between the outer sealing ring 6 and the cylinder cover 8 more easily, gas is prevented from escaping, and high-pressure oil is prevented from entering the cylinder; the outer sealing ring 6 is also provided with a through hole 602, so that high-pressure oil can enter between the inner sealing ring 7 and the outer sealing ring 6 through the through hole, thereby enabling the inner sealing ring 7 to be stressed uniformly and to be recovered and deformed more easily, as shown in fig. 1 and fig. 3 a); the inner sealing ring 7 in the invention is made of high temperature resistant, deformable and wear resistant metal, and meanwhile, two annular grooves are respectively arranged at the outer edge port and the inner edge port of the lower end of the inner sealing ring 7, namely a first groove 701 at the outer edge port corresponding to the bottom surface of the pressing ring 9 and a second groove 702 at the inner edge port corresponding to the top of the cylinder sleeve 11, so that the compression resilience of the inner sealing ring 7 is enhanced, and the axial compensation feeding amount is larger, as shown in fig. 1 and 3 b).
As shown in fig. 1, a), b) and c) of fig. 3, in the present invention, the inner seal ring 7 and the outer seal ring 6 transmit the interaction force through the inclined plane to generate deformation and relative displacement, the first groove 701 on the inner seal ring 7 makes the inner seal ring 7 have better compression resilience and increases the feed amount thereof, the rolling element 10 is placed in the second groove 702, and the outer seal ring 6 is provided with the ring groove 601 and the through hole 602, so that the oil film is easily formed between the outer seal ring 6 and the cylinder head 8, and at the same time, the oil film is more uniformly acted by the high-pressure oil, and the inner seal ring 7 is easily restored to deform.
The reciprocating high-low pressure self-adaptive compensation sealing device designed by the invention can keep the pressure of the sealing surface consistent along with the pressure change of working conditions, and has the advantages of simple sealing structure, good pressure self-adaptability and the like.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (5)
1. A reciprocating high-low pressure self-adaptive compensation sealing device comprises a double-ring sealing structure which is arranged in a rotary engine cylinder gland (5) and is positioned between a cylinder cover (8) and a cylinder sleeve (11), and high-pressure oil exists between an end cover (3) and the gland (5) of the rotary engine; the double-ring sealing structure is characterized by comprising an outer sealing ring (6), an inner sealing ring (7), a pressure ring (9) and a rolling body (10), wherein the upper parts of the outer sealing ring (6) and the inner sealing ring (7) are tightly attached, and a sealing surface at the attachment part is an inclined plane; the lower end inner edge opening of the inner sealing ring (7) is positioned at the upper end of a cylinder sleeve (11), the pressing ring (9) is arranged between the inner sealing ring (7) and the gland (5), and the rolling body (10) is arranged between the lower end outer edge opening of the inner sealing ring (7) and the pressing ring (9); when the inner sealing ring (7) is acted by gas pressure in the cylinder, the rolling body (10) is used as a fulcrum of deformation of the inner sealing ring (7) and limits axial displacement of the inner sealing ring (7); the high-pressure oil enables the outer sealing ring (6) and the inner sealing ring (7) to recover and deform.
2. The reciprocating type high-low pressure self-adaptive compensation sealing device according to claim 1, characterized in that the outer sealing ring (6) and the inner sealing ring (7) can rotate relative to the cylinder cover (8) and can generate deformation compensation according to the pressure change of working conditions to change the pressure of a sealing surface, so that the friction loss is reduced, and the sealing effect is improved.
3. The reciprocating type high-low pressure self-adaptive compensation sealing device according to claim 2, characterized in that under different working condition pressures, the gap amount between the inner sealing ring (7) and the cylinder cover (8) is different, the sealing surface pressure between the outer sealing ring (6) and the cylinder cover (8) is different, and an oil film can be formed all the time.
4. The reciprocating type high-low pressure self-adaptive compensation sealing device according to claim 3, characterized in that when the gas pressure in the cylinder is higher than the high-pressure oil pressure, the inner sealing ring (7) is deformed by the gas pressure in the cylinder, the radial diameter of the inner sealing ring (7) is increased, and the feeding amount is generated along the axial direction, the clearance between the inner sealing ring (7) and the cylinder cover (8) is compensated, so as to prevent the gas in the cylinder from escaping; the inner sealing ring (7) is used for preventing high-temperature gas in the cylinder from directly contacting the outer sealing ring (6), so that the outer sealing ring (6) is protected; meanwhile, the outer sealing ring (6) is deformed by the action force of the inner sealing ring (7), so that the pressure between the outer sealing ring (6) and the cylinder cover (8) is increased, and the sealing performance is enhanced.
5. The reciprocating type high-low pressure self-adaptive compensation sealing device according to claim 3, characterized in that when the gas pressure in the cylinder is lower than the high-pressure oil pressure, the outer sealing ring (6) is acted by the high-pressure oil, the force of the high-pressure oil is acted on the inner sealing ring (7) through the inclined surface, the inner sealing ring (7) recovers deformation, a gap is generated between the inner sealing ring (7) and the cylinder cover (8), and the friction loss is reduced; the pressure between the inner sealing ring (7) and the cylinder cover (8) is reduced; an oil film is formed between the outer sealing ring (6) and the cylinder cover (8), so that gas can be prevented from escaping, and high-pressure oil can be prevented from entering the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111517656.7A CN114382609A (en) | 2021-12-13 | 2021-12-13 | Reciprocating high-low pressure self-adaptive compensation sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111517656.7A CN114382609A (en) | 2021-12-13 | 2021-12-13 | Reciprocating high-low pressure self-adaptive compensation sealing device |
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| CN114382609A true CN114382609A (en) | 2022-04-22 |
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|---|---|---|---|
| CN202111517656.7A Pending CN114382609A (en) | 2021-12-13 | 2021-12-13 | Reciprocating high-low pressure self-adaptive compensation sealing device |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3730152A (en) * | 1970-02-19 | 1973-05-01 | P Vincent | Rotary internal combustion engines |
| US4520712A (en) * | 1982-09-10 | 1985-06-04 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co. | Axial piston machine having a sealed bearing box |
| CN1169506A (en) * | 1996-01-12 | 1998-01-07 | 本田技研工业株式会社 | Sealing structure for cylinder and cylinder cover in reciprocating IC engine, and assembling method for same |
| CN1553988A (en) * | 2001-09-14 | 2004-12-08 | ϣ | Reciprocating piston engine comprising a rotative cylinder |
| US20040256809A1 (en) * | 2003-04-09 | 2004-12-23 | Dimitrios Dardalis | Apparatus and method for rotating sleeve engine hydrodynamic seal |
| CN101737330A (en) * | 2010-02-10 | 2010-06-16 | 刘亚民 | Sealed structure of rolling piston compressor or engine |
| CN101815865A (en) * | 2007-08-20 | 2010-08-25 | 罗伯特-博世有限公司 | Be arranged in the axial piston machine of wobbler structure with controlling device |
| CN105240137A (en) * | 2015-11-02 | 2016-01-13 | 重庆金花玻璃钢有限公司 | Engine cylinder head with sealing ring |
| CN112682212A (en) * | 2020-12-30 | 2021-04-20 | 潍柴动力股份有限公司 | Annular sealing structure, split type cylinder head gasket and engine |
-
2021
- 2021-12-13 CN CN202111517656.7A patent/CN114382609A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3730152A (en) * | 1970-02-19 | 1973-05-01 | P Vincent | Rotary internal combustion engines |
| US4520712A (en) * | 1982-09-10 | 1985-06-04 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co. | Axial piston machine having a sealed bearing box |
| CN1169506A (en) * | 1996-01-12 | 1998-01-07 | 本田技研工业株式会社 | Sealing structure for cylinder and cylinder cover in reciprocating IC engine, and assembling method for same |
| CN1553988A (en) * | 2001-09-14 | 2004-12-08 | ϣ | Reciprocating piston engine comprising a rotative cylinder |
| US20040256809A1 (en) * | 2003-04-09 | 2004-12-23 | Dimitrios Dardalis | Apparatus and method for rotating sleeve engine hydrodynamic seal |
| CN101815865A (en) * | 2007-08-20 | 2010-08-25 | 罗伯特-博世有限公司 | Be arranged in the axial piston machine of wobbler structure with controlling device |
| CN101737330A (en) * | 2010-02-10 | 2010-06-16 | 刘亚民 | Sealed structure of rolling piston compressor or engine |
| CN105240137A (en) * | 2015-11-02 | 2016-01-13 | 重庆金花玻璃钢有限公司 | Engine cylinder head with sealing ring |
| CN112682212A (en) * | 2020-12-30 | 2021-04-20 | 潍柴动力股份有限公司 | Annular sealing structure, split type cylinder head gasket and engine |
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