30results about How to "Improve opening force" patented technology

The disclosure relates to a gusseted reclosable package with an internal unisex reclosure strip. The reclosure strip has upper and lower flanges, and a two or three-point connection, rather than a four-point connection, to the interior circumference of the package. This results in the package having a higher internal (product side) opening strength than the external (consumer side) opening strength, thereby allowing the package to be easily opened by the consumer while maintaining a high burst strength.

With a method for operating an internal combustion engine with a fuel injector (18) that is opened and closed electrically, a booster capacitor (BK) serving to increase the current intensity when the fuel injector (18) is opened, reliable fuel injection is ensured, even in extreme cases, such as resumption of fuel injection after an overrun condition, and in a starting procedure after a shutoff phase that is accompanied by an increase in pressure in the high pressure fuel system due to the fuel heating up, when booster capacitors are used that were designed for normal operation, by switching the current profile in certain operating states of the internal combustion engine from a standard value to an increased value and / or to a longer duration and, when the certain operating state ends, by resetting it to the standard value and the standard duration.

The disclosure relates to a gusseted reclosable package with an internal unisex reclosure strip. The reclosure strip has upper and lower flanges, and a two or three-point connection, rather than a four-point connection, to the interior circumference of the package. This results in the package having a higher internal (product side) opening strength than the external (consumer side) opening strength, thereby allowing the package to be easily opened by the consumer while maintaining a high burst strength.

A gas lubrication bird-wing-shape-imitation v groove end face sealing structure comprises two sealing rings with sealed end faces; the two sealing rings comprise a movable ring and a static ring; the end face of at least one of the movable ring and the static ring is provided with a plurality of bird-wing-shape-imitation v grooves; each bird-wing-shape-imitation v groove is composed of a tail-feather-shape-imitation v groove body and a flight-feather-shape-imitation v groove body; the tail-feather-shape-imitation v groove bodies are provided with swallow-tail-shaped furcal tails; the flight-feather-shape-imitation v groove bodies are roughly in a bull horn shape with the thick ends and the tail tip ends; the tail-feather-shape-imitation v groove bodies are transversely arranged at the thick ends of the flight-feather-shape-imitation v groove bodies; the thick segments of the flight-feather-shape-imitation v groove bodies and the thick ends of the tail-feather-shape-imitation v groove bodies are toward airflow; the bird-wing-shape-imitation v grooves are arranged to be bird-wing-shape-imitation v groove annular belts; secondary annular sealing dams are arranged between the bird-wing-shape-imitation v groove annular belts; annular main sealing dams are arranged on the low-pressure sides of the end faces; drainage grooves are arranged on the high-pressure sides of the end faces; the drainage grooves and the bird-wing-shape-imitation v grooves are shallow grooves of the micrometer scale; the depths of the flight-feather-shape-imitation v groove bodies are gradually decreased in the airflow direction. The sealing structure has the advantages of being good in stability and long in service life, and resisting abrasion.

The invention relates to a valve assembly (1) for controlling the gas pressure in a gas rail (2) of a fuel system for supplying an internal combustion engine with a gaseous fuel, in particular with natural gas, comprising a first valve (3) for connecting the gas rail (2) to a gas feed (4), a second valve (5) for connecting the gas rail (2) to a gas return (6), and a control piston (7) for actuating both valves (3, 5), wherein the control piston (7) delimits a control chamber (8), to which a hydraulic pressure medium can be applied by a pressure medium feed (9) and which can be depressurized via a pressure medium discharge (10), and further comprising a sealing element (11) which is designed as a corrugated or folding bellows and is arranged between a gas chamber (12) and a pressure mediumchamber (13) for media separation. The valve assembly is characterized by a pressure differential limiting valve (14) having a reciprocating piston (15) which, on the one hand, is acted upon by a pressure (p1) prevailing in the gas chamber (12) and which, on the other hand, is acted upon by a pressure (p2) prevailing in the pressure medium chamber (13), and which opens an additional gas return (16) when a predetermined pressure differential applied to the piston (15) is exceeded. The invention further relates to a fuel system comprising a valve assembly (1) according to the invention for controlling the gas pressure in a gas rail (2).

A linkage mechanism for a valve assembly includes one of a slot and an engagement component operably coupled to at least one drive component and located eccentrically from a rotational axis of the at least one drive component, a link operably coupled to one end of a valve stem of a valve member and being moveable with the valve stem, the link having another one of a slot and an engagement component, and a rotatable lever coupled to at least one housing, the lever including one of a first slot and a first engagement component operably engaged with the one of the slot and the engagement component of the at least one drive component and one of a second slot and a second engagement component operably engaged with the one of the slot and the engagement component of the link, wherein rotation of the at least one drive component causes the lever to rotate to convert a rotational movement of the at least one drive component to a linear movement of the link such that the link, the valve stem, and the valve member are moved axially in a direction along a longitudinal axis of the valve stem.

The invention relates to a mechanical seal device for an end face seal ring with controllable bellows seal. The mechanical seal device is provided with a moving ring and a non-rotating stationary ring, wherein the moving ring can synchronously rotate along with a rotating shaft, and the stationary ring is connected with a stationary ring base; the axial relative end faces of the moving ring and the stationary ring are the respective seal faces, and at least one seal face is in a plane structure. Electric heating structures keeping the distance with the seal faces are arranged in the circumferential direction of the stationary ring and / or the moving ring with the plane-structure seal surface at intervals, and the electric heating structures are connected with a control system. On the basis that the conventional end face bellows process is kept, the mechanical seal device can process the seal faces into high-precision planes and can obtain the high surface quality on the planes and the controllable bellows seal faces through heating control for the electric heating structures, therefore the influences on the seal effects caused by various factors can be effectively eliminated and avoided, the good hydrodynamic effect can be generated, and the ideal fluid film opening force and stiffness are obtained.

A cover (1) for a shaft of a medical scoping device comprises tubular member (2) arranged for application on the distal tip of the medical scoping device. The cover (1) comprises a plurality of projecting elements (3) spaced apart circumferentially around the tubular member (2), each projecting element having a base portion (13) and an arm portion (14). The projecting elements are pivotably mounted on the tubular member about a pivot axis. The base portion (13) comprises a detent (20), and the tubular member comprises a contact region, for example a protuberance (23), said contact region being located such that pivoting movement of the projecting element for moving the arm portion in a distal direction can effect impacting of the detent (20) on the contact region (23).

The invention provides an ultra-high temperature, high pressure and large flow rapid response solenoid valve, which includes a movable valve core assembly, a magnetic isolation tube assembly and a coil assembly. The movable valve core assembly includes a center tube, an upper movable iron core and a lower movable iron core. A magnetic isolation ring is installed between the iron core and the lower movable iron core; the magnetic isolation tube assembly includes an upper fixed iron core arranged opposite to the upper movable iron core and a lower fixed iron core arranged opposite to the lower movable iron core; the coil assembly includes a The upper coil corresponding to the upper movable iron core, the lower coil corresponding to the lower movable iron core, and the first magnetic conductive plate and the second magnetic conductive plate arranged on both sides of the lower coil, and a magnetic isolation is installed between the upper coil and the lower coil. The lower end of the upper coil is provided with a third magnetic conductive plate, and the first magnetic conductive plate and the third magnetic conductive plate are respectively located on both sides of the magnetic isolation member; the invention provides an ultra-high temperature, high pressure and large flow rapid response solenoid valve, It overcomes the defects of the existing electromagnetic valve having a long opening and closing response time and being unsuitable for a high temperature and high pressure environment.

A mold clamping apparatus includes a fixed platen, a mold clamping cylinder, a movable platen moved by the mold clamping cylinder toward the fixed platen, and a mold opening / closing actuator for moving the movable platen or the mold clamping cylinder. The mold clamping apparatus further includes a mold thickness adjustment cylinder provided between the mold clamping cylinder and the movable platen, the mold thickness adjustment cylinder being configured to generate an axial force larger than an axial force in an expanding direction of the mold opening / closing actuator and smaller than an axial force in a contracting direction of the mold clamping cylinder.

The invention discloses a dry gas sealing structure with controllable end face stiffness, which includes a moving ring and a static ring, the moving ring is a rigid end face, the static ring includes a static ring body, and a plurality of annular rings are embedded in the end face of the static ring body The evenly distributed elastic member also includes an annular flat foil assembled on the end surface of the static ring body, the flat foil is in contact with the elastic member, and a dynamic pressure groove is opened on the surface of the flat foil. The invention provides a dry gas seal structure with controllable end surface stiffness to solve the problems of weak self-adaptability and insufficient use effect in high-parameter service environments of rigid dry-gas seal technology in the prior art, and to realize improvement in high-parameter service The sealing effect in the environment and the purpose of the dynamic stability of the shafting.

For non-contact mechanical seal rings with bidirectional hydrodynamic pressure grooves, the same form of hydrodynamic pressure groove structural units are arranged at equal intervals along the circumference on the outer side of the sealing end face; the hydrodynamic pressure groove structural units are composed of central grooves The airfoil-shaped structure is composed of the same wing grooves respectively joined to the two sides of the circumference and symmetrically extended to the two sides; the two sides and the side walls of the central groove are respectively the two radial extensions of the sealing end face, and the inner wall It is an arc concentric with the sealing end face, and the central groove opens on the peripheral wall of the sealing ring; the long sides on both sides of the wing groove and the short groove side at the converging extension end are respectively two radial extensions of the sealing end face, and the length of the two wing grooves is The side edges are respectively notch portions joined with the side walls of the central groove on the side where they are located. The hydrodynamic pressure groove structure can improve the hydrodynamic pressure effect of the seal, increase the opening force of the seal end face, increase the fluid film thickness and film stiffness between the seal end faces, reduce the leakage of the seal, simplify the processing difficulty of the groove shape, and reduce the sealing parts. Process requirements for processing and assembly.

In an electrostatic relay in which a moving contact and a movable electrode are displaced in parallel with a base substrate, an opening force is increased when the movable electrode is separated from a fixed electrode, and a structure is simplified to enhance a degree of freedom of design. A fixed contact portion and a fixed electrode portion are fixed to the base substrate. The fixed electrode portion and a movable electrode portion constitute an electrostatic actuator that displaces the movable electrode portion and a moving contact portion. A movable spring provided in a spring supporting portion retains the movable electrode portion in a displaceable manner. A cantilever secondary spring is provided in the spring supporting portion, and a projection portion is provided in a front end face of the movable electrode portion. The secondary spring abuts on the projection portion while being not deformed until abutting on the projection portion, before the moving contact of the moving contact portion abuts on the fixed contact of the fixed contact portion when the moving contact portion and the movable electrode portion are displaced.

The invention discloses an impeller assembly for axial flow compressed air pressurization in a shaft seal cavity. The impeller assembly comprises a static impeller and a flow guide impeller. The invention further discloses a dry gas sealing structure for axial flow compressed air pressurization in the shaft sealing cavity, and the dry gas sealing structure comprises the impeller assembly and further comprises an axial positioning ring, a sealing end cover, a working spring, a push ring, a static ring, a movable ring, a movable ring seat and a sealing chamber. After a gas sealing medium is guided and pressurized, the pressure of the gas sealing medium at the gas inlet of the movable ring is improved, the opening force and the gas film rigidity are also increased, and then the opening capacity and the external interference resistance of the gas film are improved; the formed gas film effectively overcomes the elastic force and fluid static pressure of the working spring, so that the contact probability between the two sealing rings is reduced, the frictional wear phenomenon is reduced, finally, the purposes of improving the dry gas sealing stability and prolonging the service life are achieved, and the dry gas sealing structure is particularly suitable for low-pressure and high-speed special working conditions.

The invention relates to a mechanical seal device with seal rings with controllable cone bevel seal end faces. The mechanical seal device is provided with a moving ring capable of synchronously rotating along with a rotary shaft and a non-rotating static ring connected with a static ring seat. Axially-opposite end faces between the moving ring and the static ring serve as respective seal faces. The seal face of at least one of the static ring and the moving ring is of a plane structure, and an annular electric heating structure concentric with the static ring and / or the moving ring is arranged at the position, spaced from the seal face, in the static ring and / or the moving ring and connected with a control system. On the basis of an existing end face processing technology, the seal faces can be processed into planes, the cone bevel structure seal faces with high surface quality and controllable cone angle sizes can be obtained on the planes through heating control over the annular electric heating structures, and therefore the influences of various factors on the seal effect can be effectively eliminated, a very good fluid hydrodynamic effect can be generated, and very ideal fluid film opening force and rigidity are obtained.