31results about How to "Enhanced hydrodynamic effect" patented technology

A bilaterally rotatable end surface mechanical sealing structure with dovetail grooves comprises two mechanical sealing rings including a movable ring and a fixed ring. A plurality of bilaterally rotatable dovetail grooves are arranged on end surfaces of at least one of the movable ring and the fixed ring and are circumferentially distributed along the end surfaces of the movable ring or the fixed ring, each dovetail groove comprises a pair of spiral grooves and an arc groove, the spiral grooves of each dovetail groove are reverse to each other, roots of the spiral grooves of each dovetail groove are connected with each other by the corresponding arc groove, so that each profiled groove with the shape similar to a dovetail is formed, each spiral groove is positioned on a high-pressure side, namely the upstream, each arc groove is positioned on a low-pressure side, namely the downstream, and directions of spiral angles of the spiral grooves which are reverse to one another correspondingly are opposite to one another.

The invention relates to a mechanical seal ring provided with multi-sawteeth-shaped spiral grooves. The multiple spiral grooves evenly distributed along the circumference of the end face are formed in the end face of the seal ring, and the groove root of each spiral groove is in a sawtooth shape. According to the mechanical seal ring provided with the multi-sawteeth-shaped spiral grooves, the hydrodynamic effect of a fluid of the end face of the mechanical seal ring is reinforced, and the hydrodynamic effect generation range is increased, so that a stable fluid film is formed in the running process of the mechanical seal ring, the friction extent of the end face is reduced, and the service life is greatly prolonged.

A ternary distortion-type groove end surface mechanical sealing structure comprises a dynamic ring and a static ring which are used for mechanical sealing, ternary distortion-type grooves 1 evenly distributed in the circumferential direction are machined in the sealing end surface of at least one sealing ring of the dynamic ring and the static ring, and each ternary distortion-type groove is formed by two side walls and a three-dimensional distortion variable-depth groove bottom surface; the side walls of each ternary distortion-type groove comprise the windward side ternary distortion wall surface 11 and the leeward side ternary distortion wall surface 13, and the three-dimensional distortion variable-depth groove bottom surfaces 12 gradually shallow in a distortion shape from the outer circumferential side walls of the sealing rings to the centers of the sealing rings and intersect with the sealing end surfaces on the outer sides of sealing dams 3; the intersection lines of the side walls of the ternary distortion-type grooves 1 and the outer circumferential side walls of the sealing rings are perpendicular to the sealing end surfaces; the intersection lines of the side walls of the first ternary distortion-type grooves and the sealing end surfaces are each divided into two sections, the intersection lines on the medium inlet sides are helical lines, and the intersection lines on the medium leakage sides are radial straight lines.

The invention discloses a wear-resisting piston ring with a hard-soft composite coating and the textured surface and a wear-resisting piston ring manufacture method. A hard coating like a chromium coating or a carburization / nitriding layer or a nickel base layer is deposited on an outer circle face of the piston ring, the hard coating is textured by pulse laser to achieve a regular and even micropore array, and a soft coating like a silver coating or a tin coating or a magnetic control sputtering MoS2 coating is prepared on the textured surface. The hard coating can serve as a hard support layer to improve wear resistance of the outer circle face of the piston ring. The surface micropore array can enhance fluid hydrodynamic effects of lubrication oil, can serve as a storage tank for lubrication oil / agent and can collect abrasive dust particles. The soft coating can serve as lubrication phase to achieve self lubrication and self repair of the friction surface.

A bilaterally rotatable end surface mechanical sealing structure with dovetail grooves comprises two mechanical sealing rings including a movable ring and a fixed ring. A plurality of bilaterally rotatable dovetail grooves are arranged on end surfaces of at least one of the movable ring and the fixed ring and are circumferentially distributed along the end surfaces of the movable ring or the fixed ring, each dovetail groove comprises a pair of spiral grooves and an arc groove, the spiral grooves of each dovetail groove are reverse to each other, roots of the spiral grooves of each dovetail groove are connected with each other by the corresponding arc groove, so that each profiled groove with the shape similar to a dovetail is formed, each spiral groove is positioned on a high-pressure side, namely the upstream, each arc groove is positioned on a low-pressure side, namely the downstream, and directions of spiral angles of the spiral grooves which are reverse to one another correspondingly are opposite to one another.

The invention relates to a tilting directional microporous end surface mechanical sealing structure comprising a dynamic ring and a static ring which are sealed mechanically, one side of the end surface of the dynamic ring and the static ring is a high-voltage side, namely, an upstream part, and the other side thereof is a low-voltage side, namely, a downstream part; the end surface of the dynamic ring or the static ring is provided with a microporous ring belt which is arranged on the upstream part of the end surface; the downstream part of the microporous ring belt is provided with a continuous ring-shaped sealing dam; and a long shaft of the micropore forms a tilting angle with the diameter of the sealing end surface passing through the center of the micropore. The tilting directional micropore end surface mechanical sealing structure has the beneficial effects of: greatly improving hydrodynamic effect of the microporous end surface, leading the sealing to have good starting-stopping effect under low-voltage condition, being capable of being applied in a liquid medium and a gas medium by setting the depth of the micropore, being capable of fully exerting the capabilities and advantages of microporous solid particles, realizing no contact, wear resistance and no leakage of sealing, prolonging the service life and improving the sealing reliability.

The invention discloses a mechanical seal end face structure of a variable-depth spiral T-shaped groove, which includes a moving ring and a static ring of the mechanical seal. On the downstream side, a variable-depth spiral T-shaped groove is provided on the end surface of the moving ring, and a sealing weir is arranged between the variable-depth spiral T-shaped grooves. The number of variable-depth spiral T-shaped grooves is an even number between 8 and 24; the radial width of the entire variable-depth spiral T-shaped groove accounts for no more than one-third of the radial width of the entire sealing end face. The invention effectively improves the fluid dynamic pressure effect, improves the working efficiency of the mechanical seal; ensures the static sealing performance of the mechanical seal; solid particles can be discharged from the sealing end face in time, reduces the friction between the end faces, and improves the temperature distribution. The problem of deformation of the sealing ring or even cracking of the end face of the mechanical seal due to uneven heating is avoided.

The invention discloses a constant-elasticity film-coating involute spiral groove long-life sealing device, particularly relates to a shaft end sealing device suitable for an aero-engine with high rotating speed, high maneuverability and the complex load, and belongs to the technical field of mechanical sealing. The constant-elasticity film-coating involute spiral groove long-life sealing device comprises a sealing shell, a first sealing rubber ring, a pressing plate, a lap joint wavy spring, a second sealing rubber ring, a check ring, a graphite ring, a sealing movable ring and a third sealing rubber ring. The constant-elasticity film-coating involute spiral groove long-life sealing device is used for isolating an oil cavity from an air cavity and preventing lubricating oil in the oil cavity from leaking to the air cavity so as to fulfill the oil sealing aim. The lap joint wavy spring is used for generating an axial force, the axial force is transmitted to the graphite ring through the pressing plate, tight contact of the graphite ring and the sealing movable ring is guaranteed and a main sealing surface is formed. The constant-elasticity film-coating involute spiral groove long-life sealing device can reduce abrasion of a mechanical sealing device and can improve the sealing property and the stability of the mechanical sealing device, so that the life of the constant-elasticity film-coating involute spiral groove long-life sealing device is prolonged.

The invention discloses an otter board assembly. The otter board assembly comprises a triangular support and a main rib plate, wherein the triangular support is transversely arranged and capable of rotating along a fixed shaft of a bottom edge, and the main rib plate is longitudinally arranged and are linked with the triangular support. The triangular support is located in the middle of the main rib plate, and a leading edge wing, a main wing and a wing flap are sequentially arranged on the main rib plate in an imbricate mode from front to back. The sections of the leading edge wing, the main wing and the wing flap are in an arc shape, a flow guiding gap is formed between the leading edge wing and the main wing, and a flow guiding gap is formed between the main wing and the wing flap; the two sides of the main rib plate are symmetrically provided with side rib plates, and each side rib plate is provided with an upper side wing, trawl iron and a guide rail, wherein the trawl iron and the guide rails are matched with a fishing net. The front end of the leading edge wing is provided with a front coil side, and the rear end of the wing flap is provided with a rear coil side. The resistance of the otter board assembly is low, the stability of the otter board assembly is high, and the performance of a fishing device can be improved. The invention further discloses a fishing device with the otter board assembly.

The invention relates to a double-row tilting directional microporous end surface no-leakage mechanical sealing structure, comprising a dynamic ring and a static ring which are sealed mechanically, wherein one side of the end surface of the dynamic ring or the static ring is an high-voltage side, namely an upstream part, and the other side thereof is a low-voltage side, namely an downstream part,the end surface of the dynamic ring or the static ring is provided with an outer microporous ring belt and an inner microporous ring belt; microporous long shafts of the outer microporous ring belt and the inner microporous ring belt are opposite to the direction of a tilting angle of the diameter of the sealing end surface passing through the center of the micropore; the outer microporous ring belt and the inner microporous ring belt are respectively arranged on the upstream part and the downstream part of the end surface; and a continuous ring-shaped sealing dam are respectively arranged between the outer microporous ring belt and the inner microporous ring belt and the downstream part of the inner microporous ring belt. The mechanical sealing structure has the beneficial effects of: realizing no contact, wear resistance and no leakage of sealing, prolonging the service life and improving the sealing reliability.

The invention discloses a profiled groove end surface non-contact mechanical seal with a backflow function. The profiled groove end surface non-contact mechanical seal comprises a mechanical seal moving ring and a mechanical seal static ring, wherein one side of the end surface of each of the moving ring and the static ring is a high-pressure side, i.e. an upstream; the other side of the end surface of each of the moving ring and the static ring is a low-pressure side, i.e. downstream; the downstream of the end surface is provided with an annular sealing dam of a smooth plane; and at least one sealing end surface in the moving ring and the static ring is provided with a plurality of groups of fluid profiled grooves. The profiled groove end surface non-contact mechanical seal with a backflow function is characterized in that the fluid profiled groove is formed by compounding the drainage groove and a pumping reflux groove, wherein the average groove depth of the drainage groove is more than the average groove depth of the pumping reflux groove; the drainage groove is arranged on the upstream of the end surface and is communicated with sealing medium; the pumping reflux groove is the profiled groove with the appearance structure characteristic of a flying bird wing; the groove depth is in the variation rule that the middle is deep and two sides are shallow; and the tail ends of two sides of the pumping reflux groove has a certain space with the upper stream of the end surface. The profiled groove end surface non-contact mechanical seal has dual actions of upstream pumping and downstream pumping to the sealing medium, the leakage amount is reduced, and the operation reliability of sealing is improved.

The invention relates to a mechanical seal ring provided with multi-sawteeth-shaped spiral grooves. The multiple spiral grooves evenly distributed along the circumference of the end face are formed in the end face of the seal ring, and the groove root of each spiral groove is in a sawtooth shape. According to the mechanical seal ring provided with the multi-sawteeth-shaped spiral grooves, the hydrodynamic effect of a fluid of the end face of the mechanical seal ring is reinforced, and the hydrodynamic effect generation range is increased, so that a stable fluid film is formed in the running process of the mechanical seal ring, the friction extent of the end face is reduced, and the service life is greatly prolonged.

A low-leakage spiral groove liquid film mechanical seal end face structure comprises a dynamic ring and a static ring of a mechanical seal; one side of the end face of the dynamic ring or the static ring is a high-pressure side, namely, the upstream side; the other side of the end face of the dynamic ring or the static ring is a low-pressure side, namely, the downstream side; the end face of the dynamic ring or the static ring is provided with a series of launders, the downstream side is provided with a series of reverse spiral grooves uniformly distributed in the circumferential direction, the middle is provided with an annular groove communicating with the reverse spiral grooves, the upstream side is provided with outlets communicating with the annular groove and a medium side, and a series of forward spiral grooves are formed between the two adjacent outlets; and sealing dams are arranged between the reverse spiral grooves and the downstream side, and sealing weirs are arranged between the annular groove and the forward spiral grooves. The low-leakage spiral groove liquid film mechanical seal end face structure is each to achieve low leakage under various complex working conditions, excellent in tribological property, good in bearing performance and stability and long in service life.

The invention provides a mechanical seal structure of a spike-shaped distribution microporous end surface, comprising a moving ring and a static ring which are mechanically sealed, wherein the one side of the end surface of the moving ring and one side of the end surface of the static ring are high pressure sides, namely upstream; the other side of the end surface of the moving ring and the other side of the end surface of the static ring are low pressure sides, namely downstream; at least one end surface of the moving ring or static ring is provided with a group of spike-shaped micropores which are symmetrically distributed based on a rotation center and composed of inclined hydrodynamic micropores and nondirectional decompressed micropores, wherein the decompressed micropores are arranged at the tail ends of the hydrodynamic micropores; the spike-shaped micropore group forms a ring belt which is arranged on the upstream of the end surface; and the downstream of the ring belt is provided with an annular seal dam with a smooth plane. The mechanical seal structure has the beneficial effects that seal disturbance-resistant capability and stability are improved by controlling fluid hydrodynamic effect of the microporous end surface and increasing damp; the capability and advantage that micropores can prevent solid particles can be fully performed; and the fluid hydrodynamic effect and disturbance resistivity are enhanced so that noncontact stability and wear resistivity of seal are improved, the service life is prolonged, and the reliability of the seal is improved.