6results about How to "Solve seal failure" patented technology

The utility model relates to waterproof box technical field, concretely is a waterproof box, including the box, its top is provided with the box cover, and the locking mechanism is provided between the box cover and the box, the sealing frame strip is set in the top of the inner wall of the box, and the magnetic attraction mechanism is provided between the box cover and the sealing frame strip. The utility model discloses through the cooperation of magnetic attraction mechanism and limiting rod and waist -shaped hole, can automatically adsorb and promote the sealing frame strip when the box cover closes, makes it and the top of the inner wall of the box tightly and closely form initial seal, solved the problem of initial seal not strict of traditional structure because of lacking effective pre -tightening force.

The invention relates to the technical field of fluororubber processing, in particular to a fluororubber sealing element resistant to electrolyte corrosion and a preparation method of the fluororubber sealing element. The fluororubber is prepared from the following raw materials in parts by weight: 100 parts of fluororubber, 10-15 parts of polytetrafluoroethylene micro powder, 4-8 parts of an acid acceptor, 5-7 parts of magnesium-aluminum hydrotalcite, 3-5 parts of polyhedral oligomeric silsesquioxane, 35-40 parts of inorganic filler, 30-35 parts of carbon black, 8-10 parts of an active agent, 2-5 parts of a peroxide vulcanizing agent and 2-5 parts of a cross-linking agent. The fluororubber is composed of low-fluorine-content binary fluororubber and a polyvinylidene fluoride-hexafluoropropylene copolymer, through the synergistic effect of all the components, the volume swelling rate of the sealing element is controlled to be 8% or below under the condition that the sealing element is soaked in an electrolyte at the temperature of 85 DEG C, and the compression set is reduced to be within 15%; and after accelerated aging for 1000 hours, excellent elastic recovery capability and interface sealing pressure are still maintained. The sealing element has the wide temperature range adaptability of-20 DEG C to 200 DEG C and good mechanical strength, and the problem of size instability caused by swelling and softening of traditional fluororubber is effectively solved.

This application relates to an oil collecting plate for a high-pressure fuel pump. The oil collecting plate has a protrusion extending from both sides, located on the side edges. This protrusion increases the thread depth of the high-pressure fuel outlet connector, thereby increasing the effective number of thread turns and also increasing the thickness of the high-pressure sealing area, effectively blocking the impact of high-pressure fuel. To avoid stress concentration at the contact point between the high-pressure fuel outlet connector and the oil collecting plate, the original planar seal is replaced with a conical seal, improving the sealing performance of the oil collecting plate and reducing stress concentration within it. This application is applicable to the high-pressure sealing of diesel engine oil collecting plates.

This utility model relates to a water-sealing device with floats. The device includes a liquid-sealed water tank and a secondary water tank, which are connected by a connecting pipe. A valve is installed on the connecting pipe. The water-sealing device includes two sets of floats connected by connecting rods, respectively disposed in the liquid-sealed water tank and the secondary water tank. The middle part of the connecting rod is connected to a sliding mechanism in a sliding pipe, and the sliding mechanism is connected to the valve on the connecting pipe. The liquid level change of the floats drives the sliding mechanism to control the opening and closing of the valve, realizing automatic water replenishment from the secondary water tank to the liquid-sealed water tank. The water-sealing device also includes a pressure roller assembly for squeezing out liquid from the fabric. The water-sealing device provided by this utility model, through the automatic control of the float assembly, solves the problem of liquid level drop in the liquid-sealed water tank during continuous operation due to moisture loss from the fabric, ensuring stable and reliable sealing performance of the water-sealing device.

The invention relates to the technical field of oil and gas well drilling and completion, in particular to a method and system for prolonging the service cycle of a gas drilling rubber core, and the method comprises the steps that after the rubber core of a rotary blowout preventer is installed, a drilling tool continues to be put into a well mouth to the well bottom; gas is injected into a hexagonal drill rod of the drilling tool, and the gas returns out of a drill bit of the drilling tool along the drilling tool, enters an annular space between the drilling tool and a borehole and moves upwards; detecting whether sealing of the rubber core fails, and if not, discharging gas along an overflow pipeline on one side of the rotary blowout preventer; if yes, the gas is not exhausted any more, colloidal liquid is injected from the four-way position of the wellhead and enters the annulus, the gap between the hexagonal drill rod of the wellhead and the rubber core of the rotary blowout preventer is filled with liquid flow in the circumferential direction under washing of the gas in the lower annulus till sealing is completed, and then the gas continues to be exhausted. Through the method and the system, the possibility of sealing failure of the shale oil horizontal wellhead rubber core is reduced; and the overall drilling speed is relatively high.

The utility model discloses a dustproof sealing structure of automobile ball pin belongs to automobile parts technical field, including ball head seat, connecting rod and dust cover still includes the locating assembly of fixed in the lower end of dust cover and the sealing assembly of upper end, and locating assembly realizes the positioning through the locating ring of inserting in ball head seat locating groove, and realizes the locking through the resistance rod of accommodating in ball head seat sliding slot and the friction fit of it, and sealing assembly drives side board through tightening spare, and side board pushes the clamping plate of rotation connection to seal by the rubber body of setting up in on connecting rod being pressed tightly to the utility model discloses the structure, has solved the problem of the existing dust cover because of vibration easy to unthread, and the low problem of sealing reliability, and its positioning locking is stable, and the sealing clamping force is strong, can effectively prolong the service life of ball pin.