38results about How to "Solve dynamic sealing problems" patented technology

The invention provides an environment-friendly and energy-saving boat only powered by a water pumping system. The body of the energy-saving boat consists of two piece bodies, the engine room of each piece body is internally provided with at more than one centrifugal pumps, the front side wall and the back side wall of each engine room are provided with a plurality of water inlet holes and water outlet holes, the number of the water inlet holes and the number of the water outlet holes are the same as that of the centrifugal pumps, the water inlet ends of the centrifugal pumps are connected with the water inlet holes by a plurality of water inlet pipes, the water outlet ends of the centrifugal pumps are connected with the water outlet holes by a plurality of water outlet pipes, the water inlet pipes and the water outlet pipes are provided with a plurality of electromagnetic valves, the water inlet pipes between the water inlet ends of the centrifugal pumps and the electromagnetic valves of the water inlet pipes and the water outlet pipes between the electromagnetic valves of the water outlet pipes and the water outlet holes are connected with a plurality of U-shaped water inlet auxiliary pipes, the water inlet pipes between the electromagnetic valves of the water inlet pipes and the water inlet holes and the water outlet pipes between the water outlet ends of the centrifugal pumps and the electromagnetic valves of the water outlet pipes are connected with a plurality of U-shaped water outlet auxiliary pipes, both the water inlet auxiliary pipes and the water outlet auxiliary pipes are provided with the electromagnetic valves, and each engine room is further provided with a power supply which provides power for the centrifugal pumps. The environment-friendly and energy-saving boat is easy to realize the advancing.

The invention belongs to the technical field related to sewage pumps, and discloses a highly reliable and sealed submarine sewage pump. The submarine sewage pump includes an inlet shell, a stator steel sleeve, a rubber stator poured on the inner wall of the stator steel sleeve, and an outlet Housing and cutter, the two ends of the stator steel sleeve are respectively connected to the inlet housing and the outlet housing, the cutter is arranged in the inlet housing; the inlet housing is trumpet-shaped, its diameter From the end of the inlet housing far away from the outlet housing, it gradually decreases to the end of the inlet housing adjacent to the outlet housing; an outlet is provided in the middle of the outlet housing, and the outlet is connected to the external high-pressure environment connected; the inlet housing, the rubber stator and the outlet housing are connected; the present invention reduces noise and cost, has better applicability and better sealing performance.

The invention relates to a well drilling fluid mixing and drifting tool, and belongs to the field of well drilling and logging in petroleum and natural gas industries. According to the well drilling fluid mixing and drifting tool, a logging instrument is effectively trapped into the downhole, and drifting operation is effectively completed. According to the technical scheme of the well drilling fluid mixing and drifting tool, a cable core at one end of a cable is connected with an electromagnet and a motor in a conducting mode, and a cable core at the other end of the cable is connected with aground electronic control platform in a conducting mode; the middle of the outer circle of a locking connector is in screw thread connection with the lower portion of an inner cavity of a locking nut, and the lower portion of the outer circle of the locking connector is in screw thread connection with the upper portion of an inner hole of a connecting head; the electromagnet is mounted on the upper portion of an inner cavity of an electromagnet sealing seat; an anchor jaw and an anchoring spring are overall arranged in a radial through hole in a centering wing of an anchor body; the upper endof an input magnetic tile seat and an output shaft of the motor are fixed through a transmission pin, the lower end of an inner cavity of an output magnetic tile seat is in screw thread connection with the upper end of the outer circle of a centering cylinder, and the upper end of a mixing head is in screw thread connection with the lower end of a transmission shaft. According to the well drilling fluid mixing and drifting tool, viscous well drilling fluid is electrically mixed, and thus the drifting effect is effectively achieved; and a magnetic driving technology is adopted, the motor and the electromagnet are sealed in a static sealing mode, and thus sealing is safe and reliable.

The invention discloses an axial feeding hydraulic forming device of a miniature tube. The device comprises two identical hydraulic forming sub devices, wherein the two hydraulic forming sub devices are located on both ends of the miniature tube when the miniature tube is hydraulically formed; each hydraulic forming sub device comprises a mold, an axial feeding system and an oil supply system, and both the axial feeding system and the oil supply system are accurately controlled by virtue of a PLC (Programmable Logic Controller) touch screen integrated machine, so that the axial feeding quantity and a pressure loading curve are variable and controllable in a forming process, and the possibility is provided for searching the optimum forming condition. According to the hydraulic forming device of the miniature tube, axial feeding can be performed, and the feeding quantity can be accurately controlled. The axial feeding hydraulic forming device has the following advantages of simple structure of the mold and convenience in installation; the miniature tube of which the outside diameter is 0.9 to 2 mm can be hydraulically formed only by replacing appropriate parts; and the axial feeding can be performed on the miniature tube in the hydraulic forming process.

The invention discloses a full depth buoyancy regulating seawater pump, which mainly comprises a flat valve module, a plunger piston shoe module, a plunger sleeve, a force transfer and reset mechanism and a pressure compensator, wherein the pressure compensator is used for balancing a lubricating cavity and environmental stress; the force transfer and reset mechanism drives the plunger piston shoe module to alternately cycle for a pressing travel and a sucking travel, so that the flat valve module alternately cyclically sucks water and presses water; the plunger piston shoe module has a fixed interval forced reset structure, so that a plunger is reset reliably; the force transfer and reset mechanism has a bidirectional stress structural design, so that the seawater pump meets the special working condition of regulating the buoyancy by the hydraulic pressure of seawater; and a stepped plunger is adopted, large and small plungers are connected through a spherical hinge, and the problems of strength design, sealing and frictional wear of the crucial friction pair, namely an ultrahigh pressure seawater pump are solved. The full depth buoyancy regulating seawater pump can regulate the buoyancy of a submersible in sea areas with all depth, and has the characteristics of simple structure, high applicability and working reliability.

The invention belongs to a pressure system overpressure protection technology, and particularly discloses an all-metal-sealed pilot-type safety valve. The all-metal-sealed pilot-type safety valve is composed of a main valve, a pilot valve and a switcher. The pilot valve is connected with a main valve inlet and a switcher inlet. The switcher is connected with a pilot valve inlet, a main valve air chamber and a main valve outlet. A main valve seat is fixed to a main valve body. A main valve flap is connected with a piston in a threaded manner. After a main valve guide sleeve and the main valve body are mounted, a cover plate is connected with the main valve body through a bolt. A valve deck is fixed to a pilot valve body through a thread. A guide valve spring is located in the valve deck and directly acts on a valve shaft. A valve bonnet is fixed to the portion above the valve deck. The valve flap of the main valve is opened or closed in the horizontal direction. Main valve main seal is only the seal between the valve seat and the valve flap. The possibility of leakage to the outlet from the main valve air chamber is avoided effectively, and possible leakage points of the valve are reduced to the maximum. The sealing ring structure design is adopted between the main valve guide sleeve and the valve flap. The problem about movable seal of the piston at the high temperature is solved.

The invention discloses a variable structure combustion chamber of a rocket-based-combined-cycle engine. The variable structure combustion chamber is composed of a drive system, a back pressure cavity and a combustion chamber body. The drive system is located at the upper portion of the back pressure cavity. The back pressure cavity is fixed to the portion above variable sections of the combustion chamber body and forms an integral structure with the combustion chamber body. A combustion chamber fixed section is sequentially connected with variable sections of the combustion chamber body. The variable sections are connected through cooperation of ball head hinge convex faces and ball head hinge concave faces. Two sets of hydraulic drive mechanisms drive the first variable section and the third variable section of the combustion chamber body through drive rods and connecting rods. Axial sealing grooves of the variable sections are filled with graphite strips so as to isolate high-temperature fuel gas in the combustion chamber body, and sealing is guaranteed. According to the variable structure combustion chamber, stable transition among different modes is achieved through grade adjustment. In the injection mode and the subsonic combustion mode, the variable sections of the combustion chamber body are adjusted by a hydraulic drive mechanism to generate different divergence angles and throat heights, so that the combustion chamber body is in the optimal work state, and the thrusting force and specific impulse performance of the combustion chamber body are obviously improved.