337results about "Piston rings" patented technology

The invention relates to the technical field of sealing rings, and discloses a wide-temperature-zone sealing ring which comprises a sealing ring body, the sealing ring body comprises a sealing layer, a thin film layer and a compensation layer, the outer portion of the thin film layer is arranged in the sealing layer, and the outer portion of the compensation layer is arranged in the thin film layer; the sealing layer and the thin film layer are supported by different materials and are made of fully-sealed elastic flexible materials, and the thickness of the thin film layer is smaller than that of the sealing layer; the compensation layer and the sealing layer are supported by different materials, and the linear expansion of the materials of the compensation layer and the sealing layer is opposite; the thickness of the compensation layer is inversely proportional to the thickness of the sealing layer according to the linear expansion coefficients of the two materials. The materials of the sealing layer and the compensation layer are selected, so that the compensation layer expands at low temperature to offset lost sealing pressure, the compensation layer shrinks at high temperature to buffer excessive extrusion, uniform contact stress of the sealing ring is maintained in extreme temperature fluctuation, and the effect of zero-damage self-adaptive sealing in the whole temperature range is achieved.

To provide a reciprocating pump having a piston ring exhibiting higher sealing performance.SOLUTION: The reciprocating pump includes: a pump main body having a piston that compresses a liquid and a cylinder that covers the piston from the outside; a drive unit for reciprocating the piston in a reciprocating direction; and a piston ring provided in a gap between the piston and the cylinder. An annular groove is formed on an outer peripheral surface of the piston. A space inside the cylinder is partitioned by the piston ring into a high-pressure region through which the compressed liquid flows and a low-pressure region in which an internal pressure is lower than that in the high-pressure region. The piston ring has a high-pressure-side ring disposed on a high-pressure-region side in the annular groove and a low-pressure-side ring provided on a low-pressure-region side in the annular groove with respect to the high-pressure-side ring. A cutout surface that retreats toward the high-pressure-region side is formed at an end edge on an outer peripheral side of a surface facing the low-pressure-region side in the low-pressure-side ring.SELECTED DRAWING: Figure 4

A method for laser treating a substrate of a piston seal ring (PSR) (20) for a gas turbine engine includes: deforming the substrate to place a portion (310) of a first surface (30) of the substrate in tensile stress; and while holding the substrate deformed, laser treating the portion (310). After the laser treating but before release of the deformation, the first surface (30) may remain in tensile stress. Release of the deformation then at least partially cancels the tensile stress.

The invention relates to the field of fluid control devices in semiconductor liquid paths, and provides a precise control on-off valve for a semiconductor liquid path and an assembling method thereof, and the precise control on-off valve comprises a valve seat, a cylinder assembly combined on the valve seat, a diaphragm valve plate accommodated in the valve seat, and an adjusting wheel arranged on an upper cover of the cylinder. The air cylinder assembly comprises an air cylinder upper cover and an air cylinder body which are connected through a rotary lock catch structure, and a piston assembly and a limiting rod set are assembled in the air cylinder assembly. And the diaphragm valve plate is driven by the cylinder assembly to seal or separate from the valve port of the valve seat. The adjusting wheel is connected with the limiting rod set and used for adjusting lifting of the limiting lead screw, and then the maximum upward moving position of the piston assembly and the opening degree of the valve are precisely limited. The valve breaks through the bottleneck that a traditional mechanical valve is prone to abrasion and leakage, achieves the effect of precise fine adjustment of flow, and meanwhile greatly improves the flow stability of long-term operation and the clean safety of an ultra-pure fluid system.

A sliding arrangement for use in an internal combustion engine is described, comprising a cylinder liner (1) and at least one piston ring (10), wherein the liner (1) has a through-bore defining an inner surface (S) which in turn defines three sections: a first section (2) near the end of the piston stroke, facing the cylinder head (at top dead center, TDC); a second, middle section (3); and a third section (4) near the end of the piston stroke, facing the crankshaft of the engine (at top dead center, TDC), wherein (i) the TDC section (2) of the liner (1) has a surface finish with a first roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”); the middle section (3) of the liner (1) has a surface finish with a second roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”);(1) the BDC section (4) of the cylinder liner (1) has a surface finish with a third roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”), and the roughness value of the middle section (3) is significantly lower than the roughness value of the TDC section (2), and is defined by an essentially very smooth structure of recesses and projections (“valleys” and “raised areas”); and (ii) a ceramic coating (R) is applied to at least part of the contact surface of the piston ring (10) by the physical vapor deposition (PVD) process.

A thermal ablation-resistant, wear-resistant, and friction-reducing coated piston ring, a preparation method thereof and an engine are provided. An outer circumferential surface of a piston ring material matrix includes, from bottom to top, a wear-resistant and friction-reducing layer and a protective layer, and the protective layer is a single nitride layer or a multi-element nitride layer. The piston ring is arranged with the wear-resistant and friction-reducing layer and the protective layer from bottom to top. When the piston ring is installed in the engine, the high-temperature and high-pressure gas flow impacts the piston ring and contacts the protective layer on the surface of the piston ring, while the inner diamond-like carbon coating (DLC) functional layer is completely “encapsulated” and protected by the outer protective layer. The protective layer possesses higher ablation resistance compared to the DLC layer, effectively preventing phase transformation in the internal DLC layer.

The application relates to the technical field of compressors and discloses a gas piston assembly for an ultrahigh-pressure liquid-drive piston compressor, which comprises a gas piston body, a sealing element and a connecting element; the gas piston body comprises oppositely arranged first and second body parts, a cylindrical protruding part is arranged at the center of the end face of one side of the first body part, and the second body part is provided with a positioning insertion hole matched with the cylindrical protruding part at the center of the end face opposite to one side of the first body part; the sealing element comprises a plurality of first piston rings and a plurality of second piston rings, the plurality of first piston rings and the plurality of second piston rings are all sleeved on the cylindrical protruding part and are alternately arranged, and the first piston rings are arranged close to the end face of the first body part; the connecting element is used for connecting the first body part and the second body part together after the cylindrical protruding part is inserted into the positioning insertion hole; the combined piston ring is used for replacing the traditional pan piston structure for sealing, and can solve the sealing problem caused by the extremely high pressure and temperature under the ultrahigh-pressure working condition.

The application relates to the technical field of compressors, and discloses a piston-type hydrogen compressor assembly and a hydrogen compressor thereof, which comprises a piston ring, three limiting grooves are arranged in the side wall of a piston body, the piston ring is movably connected in the limiting groove of the piston body, an opening is arranged in the piston ring, the piston ring comprises a flow resistance ring and a sealing ring, the cross section of the flow resistance ring is a T-shaped structure with a rotation angle of 90 degrees, the flow resistance ring is fixedly connected to the inner ring wall surface of the sealing ring, and the outer ring wall surface of the sealing ring is in contact with the inner wall of a cylinder sleeve. The flow resistance ring shares the stress borne by the sealing ring and restricts the deformation space of the sealing ring, so that the deformation of the sealing ring in the radial direction under high temperature and high pressure is effectively prevented, the anti-creep property of the sealing ring is improved, the gap size between the sealing ring and the cylinder sleeve is always in a safe range, the sealing property between the sealing ring and the cylinder sleeve is improved, the compression efficiency of the piston body on hydrogen is ensured, and the service life of the piston ring is prolonged.

To provide a piston for an internal combustion engine and a manufacturing method thereof, capable of improving seizure resistance of a skirt face and simultaneously reducing friction.SOLUTION: A thrust side skirt portion 18A extending toward a bottom of a cylinder bore on an outer peripheral portion of a piston 10 and an anti-thrust side skirt portion 18B of a position opposed thereto are composed of an aluminum alloy as a base material 40. In forming silicon dispersion layers 43 by applying a pulse laser beam to outer surfaces of two skirt portions, a silicon average particle size of a first silicon dispersion layer 43A formed on the thrust side skirt portion 18A is determined to be smaller than a silicon average particle size of a second silicon dispersion layer 43B formed on the anti-thrust side skirt portion 18B.SELECTED DRAWING: Figure 5

The invention relates to a piston ring. A piston ring (100) for a piston of a reciprocating internal combustion engine comprises a ring section (1) and a lock section (2). The lock segment (2) comprises a circumferential parting line (7) at a first axial parting line distance (PaT) from the top surface (T) of the piston ring (100) and at a second axial parting line distance (PaB) from the bottom surface (B) of the piston ring (100). Furthermore, the piston ring (100) comprises an arcuate profile (10) having a circumferential pivot line (8) at a first axial pivot line distance (PiT) from the top surface (T) and at a second axial pivot line distance (PiB) from the bottom surface. The axial distance (9) between the circumferential parting line and the pivot line is less than 20% of the axial width of the piston ring. The arcuate profile (10) may include a most protruding, axially extending flat section (14). The flat section (14) comprises a circumferential parting line (7).

A split ring seal has: a first circumferential end and a second circumferential end; an inner diameter surface and an outer diameter surface; a first axial end face and a second axial end face. The outer diameter surface has a sealing surface. The first axial end face has: a first section; a second section outboard of the first section; and an axial protrusion between the first section and the second section The second axial end face has: a first sealing surface; a second sealing surface radially outboard of the first sealing surface; a circumferential channel between the first surface and the second sealing surface; and a plurality of channels extending radially outward from the circumferential channel.

The utility model discloses a kind of elastic rubber sealing rings, it relates to sealing ring technical field, including annular rubber ring and annular spring sheet, the cross section of the spring sheet is the "bow" character type of continuous smooth radian, the center protrusion side of spring sheet is towards inside, the inner ring center position of the rubber ring is equipped with a circle opening slot, the bottom of the opening slot corresponds with the center recessed position of spring sheet, the rubber ring inside is equipped with the profiling groove corresponding with the upper portion and lower portion of spring sheet;The utility model will continuous smooth radian, the "bow" character section, annular spring sheet is loaded into the profiling groove and opening slot of rubber ring, spring sheet can be compressed or lengthened in axial and radial direction, so that rubber ring can be made axial seal, also can be made radial seal, applicability is wide, and profiling groove wraps spring sheet area is large, and installation is stable.

The internal combustion engine piston capable of reducing abrasion comprises a piston body and a piston head, the piston body and the piston head are fixed, a piston ring groove is formed in the outer wall of the circumference of the piston head, a sealing ring is fixedly connected in the piston ring groove, a plurality of reinforcing rings are fixed in the piston head, the piston body comprises a high-temperature-resistant filling layer, and the high-temperature-resistant filling layer is arranged in the piston ring groove. A high-temperature-resistant filling layer is fixedly connected to the outer side of the plug body, a wear-resistant layer is fixedly connected to the outer side of the high-temperature-resistant filling layer, the high-temperature-resistant filling layer is made of aluminum alloy or nickel alloy, the wear-resistant layer is a dlc coating or a high-silicon aluminum alloy coating, and an assembly hole is formed in the bottom of the plug body. According to the wear-resistant piston, the high-temperature-resistant filling layer and the wear-resistant layer are matched for use, so that the piston body is more wear-resistant and high-temperature-resistant, the service life of the piston is prolonged, meanwhile, the piston and an external device can be connected more tightly through the sealing ring, and the piston head can be firmer and more durable through the reinforcing ring.

To provide a piston ring for providing sufficient sealing and long life durability of the piston ring and a cylinder liner.SOLUTION: A piston ring 100 for a piston of a reciprocating internal combustion engine includes a ring part 1 and a locking part 2. The lock 2 comprises a circumferential parting line at a first axial parting line distance from the top side T of the piston ring 100 and at a second axial parting line distance from the bottom side B of the piston ring 100. Further, the piston ring 100 comprises a cambered contour, wherein the cambered contour comprises a circumferential pivot line having a first axial pivot line distance from a top surface T of the piston ring 100 and having a second axial pivot line distance from a bottom surface. According to the invention, the axial distance between the circumferential separation line and the pivot line is less than 20%, preferably less than 10%, of the axial width of the piston ring.SELECTED DRAWING: Figure 1

The invention discloses an environment-friendly closed sealing ring and a preparation method thereof, and belongs to the field of mechanical sealing elements, and the environment-friendly closed sealing ring comprises the following substances in parts by weight: 72 parts of bio-based high polymer material particles, 8 parts of microcapsule powder, 15 parts of a plasticizer and 5 parts of a reinforcing agent. The method has the advantages that 1, the excellent environmental protection property is realized: greenization is realized from the source, a renewable bio-based material is adopted, the dependence on fossil resources is reduced, after the service life of a product is ended, the bio-based matrix and the microcapsule wall material can be biodegraded under specific conditions such as industrial composting, or the material recovery is realized in a melting reconstruction manner, and the environment-friendly property is realized; the full-life-cycle environment friendliness is really realized; the service life is ultra-long, intelligent supply is achieved through a closed self-lubricating core, the problems that a traditional lubricating agent is prone to loss and needs to be supplemented frequently are solved, the abrasion speed of a sealing ring is greatly reduced through continuous and effective lubrication, and the service life of the sealing ring can be prolonged by 2-3 times compared with that of a traditional product.

The present invention relates to an oil scraper ring (4) comprising a ring element (6), the ring element (6) having an upper ring edge (8), a lower ring edge, an inner ring surface, and an outer ring surface (14), the ring element (6) being provided with two opposing contact surfaces (20) with a ring gap (18) between the two contact surfaces (20), the outer ring surface (14) of the ring element (6) being provided with at least one scraper bar (24, 26), the oil scraper ring (4) being provided with two recesses (28), one recess (28) arranged on each contact surface (20), each of the two recesses (28) being adjacent to at least the outer ring surface (14), each contact surface (20), and the upper ring edge (8).

The utility model relates to the technical field of sealing gaskets for pumps, and discloses a sealing gasket for pumps with strong sealing performance, which comprises a sealing gasket body, the sealing gasket body comprises a central reinforcing layer and end face sealing layers distributed above and below the central reinforcing layer, and elastic sealing layers are arranged between the upper and lower end face sealing layers and the central reinforcing layer. An inner splicing convex ring and an outer splicing convex ring are arranged at the positions, close to the inner ring and the outer ring, of the upper end faces of the lower end face sealing layer, the center reinforcing layer and each elastic sealing layer respectively, and a plurality of positioning convex strips are evenly arranged on the upper end faces of the lower end face sealing layer, the center reinforcing layer and each elastic sealing layer and located between the inner splicing convex ring and the outer splicing convex ring. According to the sealing gasket with the high sealing performance for the pump, through reasonable selection and structural design of all layers of materials, the excellent sealing effect is guaranteed, the reliability and stability of the sealing gasket in a severe working environment are improved, the sealing gasket can adapt to vibration and temperature changes of the pump, and the service life of the sealing gasket is prolonged.

The application discloses a preparation method of a large-bore air-cooled diesel engine piston and specifically comprises the following steps: S1, modeling and dividing regions; S2, gradient printing; and S3, coating addition; and relates to the technical field of diesel engine pistons. The preparation method of the large-bore air-cooled diesel engine piston realizes the synergistic optimization of the overall performance of the piston through gradient printing of the piston, realizes the lightweight of the piston in cooperation with the honeycomb lattice structure, reduces the abrasion amount by using silicon carbide, improves the wear resistance of the top region, forms zirconium tri-aluminum nano precipitated phases by zirconium, refines the grains, forms a composite precipitated phase by using scandium, zirconium and aluminum, improves the high-temperature strength, constructs an efficient heat conduction network by using graphene nanosheets, improves the heat conductivity of the middle region, forms a three-dimensional network by using carbon nanotubes, improves the toughness of the skirt region, and has high interfacial bonding strength by spraying a wear-resistant and corrosion-resistant coating on the surface of the piston, reduces the friction, improves the service life of the piston and effectively reduces the maintenance cost.

The present invention relates to a finishing device, a finishing method, and a sealing system. The sealing finishing device includes a thrust system, a plurality of sealing systems, each of which has a piston and a cylinder block that fits with the piston, and a plurality of conveying pipeline systems, each of which conveys the finishing medium contained in the corresponding sealing system to a different port of an internal flow path work for finishing, and the plurality of sealing systems communicate with each other through the internal flow path work. In this regard, the thrust system of the finishing device includes a vertical plunger pump connected to the piston to provide a driving force so that the piston can move vertically relative to the cylinder block, and the multi-stage pipeline includes a first stage pipeline and a second stage pipeline connected adjacent to the downstream of the first stage pipeline, the first stage pipeline has an elbow structure connected to the outlet end of the cylinder block, and the elbow structure is connected to the second stage pipeline extending horizontally.

The invention discloses a gas-liquid cylinder which comprises a cylinder body, a piston is arranged in the cylinder body, a piston rod with the end extending out of the cylinder body is connected to the piston, a gas chamber and an oil chamber are correspondingly formed in the two sides of the piston in the cylinder body respectively, a gas channel communicated with the gas chamber is formed in the cylinder body, and the oil chamber is communicated with the gas channel. The cylinder body is further provided with an independent oil inlet and an independent oil outlet which are communicated with the oil chamber, and a switch valve is arranged at the oil outlet. When the piston rod extends outwards, the switching valve is closed to close the oil outlet, hydraulic oil is input into the oil chamber from the oil inlet, and gas in the gas chamber is compressed to form pre-pressure; and when the piston rod resets, the switching valve is opened to open the oil outlet, and the hydraulic oil in the oil chamber is discharged from the oil outlet. The reset mechanism has the advantages of being reasonable in structure and high in reset speed.

The oil control ring is a three-piece oil control ring provided with a pair of side rails and a spaced outer expansion ring disposed between the pair of side rails. The spacer expansion ring has a plurality of lugs including contact surfaces that come into contact with the inner peripheral surfaces of the side rails, the inner peripheral surfaces of the side rails have an Rz of 2.5 [mu] m or less in a prescribed initial running-in state, the contact surfaces of the lugs have an Rz of 2.0 [mu] m or less in a prescribed initial running-in state, the side rails are made of alloy steel, the Ni content of the side rails is 0.05 wt% to 0.60 wt%, and the Ni content of the side rails is 0.05 wt% to 0.60 wt%. The spacer expansion ring is made of alloy steel, and the Ni content of the spacer expansion ring is 2.9 wt% or more and 16.1 wt% or less.

The utility model provides a supercharging brake master cylinder, and belongs to the technical field of brake systems. The problem that the critical pressure of opening of an adjusting valve element in an existing supercharging brake master cylinder cannot be adjusted is solved. The pressurizing brake master pump comprises a pump body and a columnar piston, an inner cavity of the pump body is sequentially divided into a brake cavity, an oil supplementing cavity and an oil inlet cavity by the piston from inside to outside, and an axial hole communicated with the brake cavity is formed in the inner end of the piston in the axial direction. A first side hole communicated with the oil supplementing cavity and the axial hole and a second side hole communicated with the oil inlet cavity and the axial hole are formed in the side portion of the piston, a valve element and a spring are arranged in the axial hole, the axial hole penetrates through the piston, the inner side of the outer end of the piston is in threaded connection with an adjusting seat, and the two ends of the spring abut against the valve element and the adjusting seat respectively. The outer end of the adjusting base is provided with an adjusting groove used for allowing a tool to be inserted and driving the adjusting base to rotate in the circumferential direction. The supercharging brake master cylinder has the advantage of being convenient to adjust.

The utility model relates to a sectional type exhaust pipe sealing ring, which belongs to the technical field of sealing rings and comprises a sealing ring body, a rubber pad and a wave spring, the rubber pad is mounted on the outer side of the sealing ring body through a mounting component, the mounting component comprises an arc-shaped metal strip, annular grooves are arranged at two ends of the outer side of the rubber pad, and the arc-shaped metal strip is mounted in the annular grooves. A square groove is formed in one end of the arc-shaped metal strip, a first arc-shaped strip is fixedly installed at the other end of the arc-shaped metal strip, circular cavities are formed in the rubber pad in a circumferential array mode, the wave springs are fixedly installed in the circular cavities, and limiting columns are symmetrically installed in the circular cavities. The impact load of high-frequency bumping on the sealing ring body is remarkably reduced, so that fatigue damage caused by vibration of the sealing ring body is reduced, the service life is prolonged, the limiting columns can limit excessive compression or deviation of the wave springs, it is guaranteed that force transmission is uniform in the buffering process, the rubber pad is convenient to disassemble and replace, and time and labor are saved.

The disclosure relates a piston (1) for a reciprocating internal combustion piston engine. The piston has a scraper ring groove (2), for receiving an oil scraper ring, the groove (2) extending annularly around a circumference of the piston (1). A receptacle volume (3) is arranged below the scraper ring groove (2), and a receiver conduit (4) extends between the scraper ring groove (2) and the receptacle volume (3), so as to provide fluid communication therebetween. A drainage conduit is provided (5) extending from the receptacle volume (3) towards a bottom (1b) of the piston. Notably, a bottom (3b) of the receptacle volume (3) has an annular inclination towards the drainage conduit (5). During an upstroke of the piston, the inclined bottom of the receptacle volume thrusts lubrication oil residing within the receptacle volume towards the drainage conduit.

The utility model belongs to the technical field of oil scraping rings, and discloses an oil scraping ring structure of an internal combustion engine piston, which comprises an oil scraping piece, the oil scraping piece comprises a first semi-circular ring and a second semi-circular ring, and a positioning mechanism is arranged between the first semi-circular ring and the second semi-circular ring. And the first semicircular ring and the second semicircular ring are movably connected through a positioning mechanism. When the second semi-circular ring and the first semi-circular ring need to be separated and detached, the side, away from the first semi-circular ring, of the second semi-circular ring can be pulled, the insertion block is pulled out of the insertion groove, then the baffle makes contact with the back face of the positioning plate, and finally the second semi-circular ring is rotated by 180 degrees on the surface of the guide column through the rotating shaft; when the second semi-circular ring and the first semi-circular ring need to be assembled, the baffle and the rotating shaft only need to be inserted into the positioning groove and then rotated by 180 degrees, and the baffle is located right behind the positioning plate.

A system for engaging clutch plate packs using hydraulic pistons has been developed. The system may be used with an automatic transmission or other parts of a powertrain of a vehicle. The system includes a piston, a clutch plate pack, and a housing containing the piston and the clutch plate pack. To engage and disengage the piston from the clutch plate set, the system is configured to fill and empty a hydraulic chamber on a hydraulic side of the piston such that hydraulic fluid moves the piston toward and away from the clutch plate set. The piston includes one or more shims or spacer posts forming a flow gap. The piston is also configured to position a seal on the piston closer to the hydraulic side.

There is provided a piston ring for an internal combustion engine, the piston ring having a surface and a wear protective layer of iron or an iron alloy formed on the surface, the wear protective layer having cracks, the cracks having an average density of 10 to 160 cracks per mm of the wear protective layer, and 0.2 to 15 wt % of carbon particles, based on the total weight of the wear protective layer, and 0.2 to 15 wt % of solid particles that are not carbon particles, based on the total weight of the wear protective layer, incorporated in the iron or iron alloy. Further, there is provided a method for manufacturing the piston ring.

The utility model discloses a simple piston ring with oil storage grooves, which comprises a ring-shaped main body structure and is characterized in that a plurality of oil storage grooves are processed and formed on an excircle working surface of the ring-shaped main body structure by adopting a milling or grinding process, the plurality of oil storage grooves are annular and are uniformly distributed along the axial direction, the groove width of each oil storage groove is 0.5 mm, and the groove width of each oil storage groove is 0.5 mm. The depth of the oil storage grooves is 0.2 mm, and the sum of the widths of the oil storage grooves accounts for 1 / 3-1 / 2 of the height of the annular body structure. The lubricating device is simple in structure and good in lubricating effect.

The utility model relates to the technical field of carbonization furnace feeding, and discloses a carbonization furnace push rod sealing device which comprises a push rod sealing sleeve, two floating assemblies are arranged at the right end of the push rod sealing sleeve, and the floating assemblies are used for guaranteeing that sealing materials are intact. According to the carbonization furnace push rod sealing device, the floating assembly is installed, a floating flange and a floating sleeve on the inner side can be limited through a flange limiting disc and a combined disc, and a certain movable gap exists between the floating flange and the floating sleeve on the inner side of the flange limiting disc and the inner side of the combined disc; by means of the mode, original fixed cylinder body sealing is changed into floating cylinder body sealing, sealing materials are changed into piston ring and fluororubber sealing ring composite sealing from original packing, the service life of the sealing materials is prolonged through engine oil lubrication, and therefore when the push rod of the cylinder body is in a deformation state or generates flexibility, the sealing performance of the cylinder body is improved. And the sealing material can be ensured to be intact so as to achieve a thorough sealing effect.

The application relates to a rubber ring for sealing a pump truck piston and a preparation method thereof, and belongs to the technical field of rubber sealing rings. The rubber ring is divided into an inner ring and an outer ring, the outer ring wraps the inner ring, and the preparation raw materials of the outer ring include 62-75 parts of polyurethane particles, 5-10 parts of natural rubber, 2-5 parts of coumarone-indene resin, 7-9 parts of naphthenic oil and 4-12 parts of graphite; the preparation raw materials of the inner ring include 86-95 parts of polyurethane particles, 1-3 parts of tetrafluoroethylene powder and 5-10 parts of elastic microspheres. The rubber ring prepared by adopting the double-layer functional partition design of the outer ring wrapping the inner ring has good support and high-elasticity sealing performance. The inner ring adopts polyurethane+ tetrafluoroethylene powder+ elastic microspheres as a core support layer, relies on the high strength and high tear resistance of polyurethane itself; the outer ring adopts polyurethane+ natural rubber+ graphite-naphthenic oil paste+ coumarone-indene resin as a functional action layer, can be closely attached to a sealing surface and reduce gaps.