8 results about "Hydraulic seal" patented technology

The utility model discloses a hydraulic sealing plug, including sealing cap and plug, the sealing cap one end is with the sealing end cap of sealing, the other end is open, the inside cavity is cylindrical, and the outside is polygon, the plug is located the inside cavity of sealing cap, and is fixed in sealing end cap inboard middle part, and the plug includes the straight plug of upper portion and the reducing plug of lower portion, the reducing plug outer wall is surrounded and is provided with the screw thread, the straight plug and the reducing plug junction are equipped with the sealing ring, the sealing ring is equipped with between the sealing ring of sealing end cap below and the plug of sealing cap inner wall, simple structure, convenient to use, have good sealing performance, and have longer life.

This invention discloses a non-contact hydraulic sealing device based on the hydrodynamic effect of spiral grooves, aiming to solve the problem of dry friction damage between the spiral groove surface and the smooth surface of the stationary ring during the start-up and shutdown phases of pump equipment. The device includes a rotating ring, a stationary ring, a secondary ring, and a locking mechanism. During initial startup, the secondary ring rotates under the viscous shear force of the rotating ring, effectively transferring mechanical friction to a preset wear-resistant surface, protecting the core spiral groove from high temperature and wear. When the rotational speed reaches a preset threshold, the locking mechanism is hydraulically or electromagnetically driven, braking through a piston and locking block, causing the secondary ring to transition from a rotating state to a stationary locked state. At this time, a momentary speed jump occurs between the rotating ring and the secondary ring, guiding the spiral groove to quickly establish a high-rigidity liquid film, achieving stable and reliable non-contact operation. This invention, by introducing a secondary ring and coordinating with locking and braking control, achieves friction transfer, protects the core working surface, and achieves a protective effect on the core hydraulic sealing structure.

This invention belongs to the field of shock absorber technology and relates to a large-size wellbore axial shock absorber, including an upper connector, a housing, and a lower connector. The housing is fitted onto the outer wall of the upper connector, and a receiving cavity is formed between the inner wall of the housing and the outer wall of the upper connector. A disc spring shock absorber assembly is installed in the receiving cavity. A hydraulic shock absorber assembly is connected to the bottom of the housing, and the lower connector is connected to the bottom of the hydraulic shock absorber assembly. The hydraulic shock absorber assembly includes a hydraulic shell, a piston, and a hydraulic sealing seat. The hydraulic shell is fitted onto the bottom of the housing, and the hydraulic sealing seat communicates with the bottom of the hydraulic shell and forms a hydraulic cavity inside. The piston slides through the hydraulic sealing seat and is slidably disposed in the hydraulic cavity. The piston has a hydraulic through hole, and an electromagnetic proportional valve is connected to the hydraulic through hole. This invention improves the problem of existing technology's single shock absorber element and fixed parameters, which are difficult to adapt to the vibration characteristics of large-size wellbores, by combining disc spring and hydraulic shock absorption, adaptive stiffness of shape memory alloy adjustment plate, and active adjustment by electromagnetic proportional valve.

The present application relates to a kind of impact device and its control method and engineering machinery and its operation method, belong to the technical field of impact operation machinery such as impact breaking hammer, rock drilling, pile driving, deep-sea pile driving, dynamic compaction, metal forming etc..The existing problems of impact device, such as cylinder piston easy to be damaged, hydraulic impact of emptying, piston and cylinder wear and tear, etc.are solved.The main fixed connecting seat for connecting carrier, ram, hydraulic cylinder and ram guide part connected with the main fixed connecting seat are included, the cylinder body of hydraulic cylinder is connected with the main fixed connecting seat, and the piston of hydraulic cylinder is slidingly installed in the cylinder body;Ram is located outside the cylinder body, ram guide part is used for axially guiding and radially limiting ram, piston rod is used for driving ram to do axial reciprocating impact motion along ram guide part, and ram does not bear the hydraulic seal of hydraulic cylinder.The present application is used for impact breaking hammer, rock drilling, pile driving, deep-sea pile driving, dynamic compaction and metal forming etc.impact operation.

The present application relates to the well logging fishing is used closed fishing device, especially relates to a kind of injection well closed fishing wellhead device.The device includes wellhead sealing locking gate, variable-diameter positioning fishing short circuit and hydraulic sealing short circuit;Wellhead sealing locking gate includes main body, sealing clamping elastic gate, gate hand wheel;The upper end of main body is connected to blowout preventer, and its lower end is connected to hydraulic sealing short circuit;Variable-diameter positioning fishing short circuit includes heavy rod connector, variable-diameter positioning short circuit, fishing head;Heavy rod connector connects variable-diameter positioning short circuit;Variable-diameter positioning short circuit can be detachably connected to fishing head;Hydraulic sealing short circuit includes: steel sleeve, rubber tube, pressurizing connector, first piston, second piston and spring;Injection well closed fishing wellhead device provided by the present application maximizes the success rate of fishing, meets the requirements of safety and environmental protection standards, realizes the goal of zero overflow and zero pollution on site.

The utility model provides hydraulic sealing piece multistation detection platform relates to sealing piece detection platform technical field, including work bench, support block and slide rail, the back side symmetry fixed connection of work bench top has the slide rail, the top of slide rail is connected with the positioning block of sliding, one side of positioning block is equipped with the clamping mechanism, and the top of work bench is equipped with the sealing detection mechanism, the utility model places hydraulic sealing piece on the top of support block, two clamping blocks are connected with the output end of pneumatic cylinder as an organic whole through the connecting plate, and the output end of pneumatic cylinder can drive two clamping blocks to move to one side of hydraulic sealing piece, and connecting plate drives guide rod to move simultaneously, and guide rod extrudes positioning block through guide groove, drives positioning block to move to the other side of hydraulic sealing piece, and clamping block cooperates with positioning block and clamps the both sides of hydraulic sealing piece, fixes two hydraulic sealing pieces on the top of work bench, to solve the problem that single test station in the prior art can not check test test accuracy and the comparability of lower.

The utility model relates to the technical field of hydraulic seal, specifically disclose a kind of sealing failure detection device, including hydraulic actuator body, its side surface is equipped with shaft seal flange body, the lower end side surface of shaft seal flange body is fixedly connected with installation support plate, the side surface between the side surface of hydraulic actuator body and shaft seal flange body is fixedly installed with actuator seal, the side surface of shaft seal flange body is equipped with installation connecting cavity, the inner wall of installation connecting cavity is fixedly installed with sealing failure probe.The sealing failure detection device is provided with sealing failure probe and failure sensor electronic element, which realizes the identification of equipment seal failure before the leakage of hydraulic oil can be detected outside the equipment, helps equipment user to prevent a trouble in the bud, realizes safe production, identifies risk before risk occurs, helps to realize lean equipment maintenance, thereby effectively saves cost.