78results about How to "Guaranteed sealing function" patented technology

Provided is a sliding component that achieves both of the conflicting conditions of sealing and lubrication, that prevents the concentration of a substance that causes sediment to occur on a sliding surface by actively taking a fluid into the sliding surface and discharging the fluid from the sliding surface, and that thereby prevents the occurrence of sediment and makes it possible to maintain the sealing function of the sliding surface over a long period of time. The sliding component is characterized in that: a fluid circulation groove (10) that is configured from an inlet section (10a) that leads in from a high-pressure fluid side, an outlet section (10b) that leads out to the high-pressure fluid side, and a connecting section (10c) that connects the inlet section and the outlet section is provided to the sliding surface of at least one of a pair of sliding components that slide relative to each other; the fluid circulation groove (10) is separated from a low-pressure fluid side by a land section (R); and a cross section of the bottom wall of the fluid circulation groove (10) is formed to have a round-bottomed shape.

A piston fuel pump (18) for an internal combustion engine has a pump cylinder (40) and a pump piston (28) received in the pump cylinder (40) so as to be movable. The invention proposes that the pump piston is guided in a radial direction by means of at least a first and at least a second guide section (51, 72), and that the first and the second guide sections are spaced apart from one another in an axial direction, the first guide section being arranged in a pump cylinder of the piston fuel pump and the second guide section being arranged radially outwards in the region of the end section (52) facing the drive (29). The invention further proposes that the piston fuel pump (18) has, at the first guide section (51), a bearing and sealing arrangement (46) for the pump piston (28), which comprises a guide region (48) for the radial guidance of the pump piston (28) in the pump cylinder (40) and a sealing region (50) having a sealing lip.

The invention discloses a sealing ring for sealing an aligning roller bearing. The sealing ring comprises a rubber ring and a steel plate ring embedded in the rubber ring; a first bending portion perpendicular to the end face of the steel plate ring is molded on the periphery of the steel plate ring, a second bending portion parallel to the end face of the steel plate ring is molded at the outer end of the first bending portion, a third bending portion bent in the inner side direction of the sealing ring is molded on the inner periphery of the steel plate ring, the outer periphery of the rubber ring is a conical face with the narrow interior and the wide exterior, a gap is molded in the outer periphery of the rubber ring in the axial direction, and a ventilation hole is formed in the position, different from the position of the gap, of the circumference of the inner wall of the rubber ring; the gap and the ventilation hole can ensure that the phenomenon that due to the large interior and exterior pressure difference of the bearing, starting torque of the bearing is large, or the bearing is clamped is avoided, and due to the fact that the gap and the ventilation hole are staggered in position, sealing performance of the bearing can be ensured; an outer seal lip and an inner seal lip form a similarly-herringbone structure, and the sealing function of the bearing can be ensured while the aligning roller bearing carries out aligning.

Provided is a sealing device which comprises a sliding lip and a labyrinth lip, the sealing device being configured in such a manner that, even if the labyrinth lip is exposed to foreign matter outside a machine and swells, the deformation of the labyrinth lip is prevented and therefore the sliding lip-protecting function of the labyrinth lip is less likely to be lost. A sealing device is provided with: a sliding lip which performs sealing so that foreign matter outside a machine does not enter the inside of the machine; and a labyrinth lip which makes it less likely that foreign matter outside the machine reaches the sliding lip. The sealing device is characterized in that the front end of the labyrinth lip is provided with a cutout which absorbs the swelling of the labyrinth lip occurring when the labyrinth lip is exposed to foreign matter. Alternatively, the sealing device is characterized in that a second labyrinth lip is provided on the side of the labyrinth lip with which faces the inside of the machine. Alternatively, the sealing device is characterized in that a similar cutout is provided also in the front end of the second labyrinth lip.

The invention discloses a full-metal soluble bridge plug. The full-metal soluble bridge plug comprises a seat sealing cylinder (1), an upper cone body (2) and a sealing cylinder (3), a lower cone body(4), a lower joint (5), a release rod (7), a conversion joint (8) and a seat sealing rod (9), the lower end of the seat sealing cylinder (1) is attached to the upper end surface of the upper cone body (2), the upper end of the seat sealing cylinder (1) is connected with an externally-arranged seat sealing tool, in the seat sealing barrel (1), the upper end of the conversion joint (8) is connectedwith the lower end of the seat sealing rod (9), the lower end of the conversion joint (8) is connected with the upper end of the releasing rod (7), the lower joint (5) is connected with the releasing rod (7) through threads, the lower joint (5) is connected with the lower cone body (4) through threads, one end of the lower cone body (4) is matched with one end of the sealing cylinder (3) throughthorn teeth, and the other end of the sealing cylinder (3) is matched with the upper cone body (2) through the thorn teeth. The full-metal soluble bridge plug has the characteristics of reliable anchoring, reliable pressure bearing, complete dissolution and the like.

The invention discloses a novel air-inflation-preventing gas valve. The novel air-inflation-preventing gas valve comprises a valve body and a valve element, wherein the valve body is provided with an inflation inlet, the valve element is matched with the valve body, and the two ends of the valve element are open; a poking preventing component arranged in the valve element is provided with a first guide hole communicated with the inflation inlet; a second guide hole communicated with the first guide hole is formed in the valve element, and a sealing part making the second guide hole be sealed or through is arranged in the second guide hole. According to the novel air-inflation-preventing gas valve, the poking preventing component is adopted, the first guide hole is formed in the poking preventing component and located above the sealing part, it is prevented that the first guide hole is damaged by the sealing part to deform, the sealing part is separated from the inside the second guide hole, and the sealing function of the sealing part is lost, and the sealing function of the sealing part is guaranteed. Therefore, the phenomenon of air inflation of a liquefied gas steel cylinder can be prevented under the condition that a liquefied gas inflation gun matched with a liquefied gas steel cylinder gate valve is not used.

The invention discloses a seal ring, which comprises a ring body. A gap extending along the circumference direction is arranged on the inner side of the ring body, two circumferential sides of the gap form a large outer ring face and a small outer ring face respectively, and the radial width of the large outer ring face is larger than that of the small outer ring face. The seal ring has pressure sealing performance and active sealing performance. When abnormal situations occur in sealing connection and designed sealing conditions are not met to enable normal pressure sealing to be invalid, the seal ring can compensate, generate secondary sealing and enable a sealing structure to have large 'redundancy', thereby improving reliability. Even if other structural parts cannot exert design functions, a sealing function of an originally-designed rectangular ring body can be kept. The rectangular seal ring replaces an existing flange completely, and is reasonable in structure, convenient to use and low in cost, can be used for a novel seal flange and the existing flange, and can be used for sealing connection of a pressure gas pipeline except a flange connector.

The invention relates to a valve (1), which has at least one seal ring (7) arranged in a recess (3) of a valve housing (2), which seal ring has a seal housing (25) having a U-shaped cross-section, in which seal housing an annular sealing element (17) is arranged. The seal housing (25) has a multi-part design and contains at least one separate housing leg (28), which is fixed to an annular bottom section (27) of the seal housing (25) in a joining region (56). The sealing element (17) has a static sealing section (35), which engages in a sealing groove (64) formed in the bottom section (27) and is suitable for interacting with the two groove flanks (65) of the sealing groove (64) in a sealing manner.

The invention discloses a flange joint, which comprises two joint bodies, two flange bodies and a seal ring, wherein the end faces of the two joint bodies are opposite; a circular hole is arranged at the middle in the axial direction of each joint body; a boss is arranged in the direction of the outer circumference of the joint body; the bosses are near the respective end faces of the two joint bodies; a ring groove is arranged between the two joint bodies; a seal element is arranged in the ring groove; the end faces of the two flange bodies are opposite; the middles of the two flange bodies are respectively provided with a circular hole; annular locking grooves matched with the bosses are arranged in the circular holes; the bosses of the two joint bodies are locked in the locking grooves of the two flange bodies; the two flange bodies are fixed together through a connecting piece; the joint bodies are provided with a plurality of vent grooves for enabling the circular holes to be communicated with the ring groove; the cross section of the seal ring is in a stepped E shape; the seal ring comprises a ring body, a big outer ring surface and a small outer ring surface; the inner side of the ring body is provided with a gap extending along the circumferential direction; the big outer ring surface and the small outer ring surface are respectively formed at both sides in the circumferential direction of the gap; and the radial width of the big outer ring surface is greater than that of the small outer ring surface. In the flange joint disclosed by the invention, when the seal dual face of the joint deforms or a fastener looses to generate an abnormal seal, under the pressure of seal gas, extending deformation is generated on a seal layer to form a new seal at the position of a sealed gap, and thereby, an effect of automatic seal compensation is achieved.

The invention belongs to the technical field of sealing materials, and relates to a polysulfide sealant with low volatile matter content and low volume change and a preparation method thereof. The sealant is formed by mixing a base paste and a vulcanizing agent in proportion, and the mass part ratio of the base paste to the vulcanizing agent is 100: (8-12); the base paste comprises liquid polysulfide rubber, bis (2-mercaptoethyl) ether, a reinforcing filler and a coupling agent, the bis (2-mercaptoethyl) ether accounts for 0.5%-6.5% of the weight of the liquid polysulfide rubber, the reinforcing filler accounts for 30%-70% of the weight of the liquid polysulfide rubber, and the coupling agent accounts for 1%-6% of the dosage of the liquid polysulfide rubber; the non-volatile matter content of the obtained sealant can be kept at 95% or above, and the volume change does not exceed 2% through AS5127 / 1 standard 7.5 test. The viscosity of the polysulfide rubber can be reduced to 10%-50% of the original viscosity, the content of reinforcing filler in the sealant is greatly increased, the low volatile matter content and the low volume change rate of the sealant are achieved, and the excellent aging resistance and medium resistance of the sealant are guaranteed.