44results about How to "No sealing issues" patented technology

The invention discloses a pressurized coring tool comprising a pressure bearing device, a rotating assembly and a core catcher assembly, wherein the pressure bearing device comprises a pressure bearing assembly and a pin component, the pressure bearing assembly comprises a pressure bearing piston and a pressure bearing sleeve sheathed on the pressure bearing piston, the pin component comprises a shearing pin; the rotating assembly comprises a core shaft, one end of the core shaft is provided with a rotating device, the other end of the core shaft is provided with an automatic pressure relieving assembly; and the core catcher assembly comprises a connecting sleeve, a clamp seat, a clamp, a pressurized core catcher and a self-locking core catcher, one end of the clamp seat is connected with the lower end of the connecting sleeve, the other end of the clamp seat is connected with the pressurized core catcher, the upper end of the connecting sleeve is connected with an internal cylinder assembly, the clamp is arranged in the clamp seat, and the self-locking core catcher is arranged in the pressurized core catcher. When the pressurized coring tool disclosed by the invention is used for coring, the internal cylinder of a pressurizing tool can rotate along with the rotation of a drilling tool, and the problem that a core entering into the internal cylinder breaks easily is solved.

The invention belongs to the technical field of energy dissipation and seismic reduction of engineering structures, and provides a self-balancing type inertia damper with a reciprocating screw rod. The self-balancing type inertia damper comprises the reciprocating screw rod, magnet discs, conductor discs, a permanent magnet, a screw rod nut and a bearing support. The self-balancing type inertia damper utilizes the characteristics that the reciprocating screw rod arranges two threads with the same pitch and opposite rotation directions on the whole stroke, and a pair of magnet discs and a pairof conductor discs are arranged in pairs, so that the action torque and the reaction torque of the eddy current effect act on the reciprocating screw rod at the same time and offset each other; on theone hand, the damping coefficient is simple and easy to adjust, the damping and the stiffness are completely separated, on the other hand, the self-balancing performance that a common spiral rotary damper does not have is achieved; and the magnet discs and the conductor discs rotate together and act on the reciprocating screw rod, the rotation effects cancel each other, the longitudinal axial force is doubled, so that the eddy current effect is doubled, and a higher damping coefficient is obtained.

The invention discloses a water flow direction fixing pipeline hydroelectric module and a system and a power generation method, and belongs to the field of fluid dynamics. The water flow direction fixing pipeline hydroelectric module is characterized in that the water flow direction fixing pipeline hydroelectric module comprises a swinging following pipe, a power generation assembly (permanent magnets/coils or pressing rods/piezoelectric modules), a semi-flexible supporting member (elastic bellows or spring structures or annular double magnet structures with the same polarity being arranged upand down) and a fixing base provided with mounting holes. According to the water flow direction fixing pipeline hydroelectric module and the system and the power generation method, since water flow flows through a barrier to form eddy behind the barrier, the disturbance of the eddy causes the swinging following pipe to swing left and right following the semi-flexible supporting member at the lower part, and relative motion occurs between a fixed member and a moving following member of the power generation assembly inside to carry out power generation. The water flow direction fixing pipelinehydroelectric module and the system and the power generation method has the advantages that the whole system does not need lubrication and maintenance, moving members do not exist, the service life islong, maintenance is not needed, and the sealing problem of a rotating element does not exist.

The invention belongs to the technical field of energy dissipation and shock absorption of engineering structures, and provides a self-balancing inertial damper adopting a right-hand and left-hand thread lead screw. The self-balancing inertial damper comprises the right-hand and left-hand thread lead screw, a magnet disc, a conductor disc, permanent magnets, double-headed flange cylinders, feed screw nuts and the like; a right-hand threaded section and a left-hand threaded section are arranged on the left side and the right side of the right-hand and left-hand thread lead screw correspondingly, provided with the feed screw nuts in a sleeved mode correspondingly and connected with bearings of a fixed support; the magnet disc and the conductor disc are arranged in pairs, the magnet disc is provided with the permanent magnets, and the magnet disc and the permanent magnets are fixedly connected with the feed screw nuts through the double-headed flange cylinders and do not make contact withthe right-hand and left-hand thread lead screw; and through reciprocating of the right-hand and left-hand thread lead screw on the axis, the magnet disc and the conductor disc always relatively rotate to generate an electric vortex effect, and shock absorption control of the structure can be achieved. By adopting right-hand and left-hand thread lead screw transmission, the purposes of inertial synergy and damping synergy can be achieved, meanwhile, the self-balancing performance of the lead screw is achieved, the mounting requirements for the two both ends of the damper can be relaxed, and the self-balancing inertial damper can also be applied to a pure tension system, and has good engineering value.

The invention discloses a pressure bearing device suitable for a pressurized coring tool, which includes a pressure bearing assembly and a pin component, wherein the pressure bearing assembly includes a pressure bearing piston and a pressure bearing sleeve arranged on the pressure bearing piston in a sleeving manner; the pin component includes a shear pin; the upper end of the pressure bearing piston is limited on a pressurized connector in a hexagonal sleeve through a pressure bearing steel ball, and the lower end of the pressure bearing piston is a connecting end connected with a rotary assembly; the pressure bearing sleeve is fixedly connected with the pressure bearing piston through the shear pin; the lower end of the pressure bearing sleeve is limited on a short joint of an outer cylinder; and sand discharge holes and flow channels communicated with an inner chamber of the pressure bearing piston are arranged at the upper end of the pressure bearing piston. The pressure bearing device solves the problem that the conventional pressurized coring tool damages the performance of the outer cylinder as a pin penetrates through the outer cylinder, and achieves the purpose that the structure and performance of the outer cylinder are not damaged.

The invention relates to a modular self-balancing inerter damper. Transmission gears, transfer discs and screw rod nuts are sequentially and symmetrically arranged on the two sides of a right-hand threaded and left-hand threaded screw rod from the middle to the end parts correspondingly, the transmission gears are rotationally installed on the screw rod nuts connected with the right-hand threadedand left-hand threaded screw rod through the transfer discs and rotate along with the screw rod nuts, two support bearings are arranged at the two ends of the right-hand threaded and left-hand threaded screw rod in a sleeving mode respectively and connected with the screw rod nuts to serve as fixed supports of the damper; and a bearing plate support is located on the middle position of the right-hand threaded and left-hand threaded screw rod, and an upper main gear and a lower main gear are respectively arranged on a central bearing at the upper part of a bearing plate and under a central bearing at the lower part of the bearing plate, and are respectively connected with the central bearing and the bearing plate through bolts. According to the modular self-balancing inerter damper, a maingear rotates around the axis in the opposite rotation direction through the right-hand threaded and left-hand threaded screw rod, the electromagnetic force and the counter-acting force of the electromagnetic force act on the screw rod in the equivalent opposite direction, the torques in the rotation direction around the axis are mutually offset, and the self-balancing performance of the screw rodis achieved.

The invention provides a fastening device for a damping net at a stilling chamber of a wind tunnel. The fastening device comprises a fixing rack, a tensioning mechanism and a clamping device. The fixing rack is directly welded to a cylinder of the stilling chamber of the wind tunnel. One end of the tensioning mechanism is mounted on the fixing rack; the other end of the tensioning mechanism is connected with the clamping device. The damping net is wound around a wire rope and locked; the wire rope with the damping net is fastened to the clamping device. The fastening device allows tension level of the damping net to be adjustable, axial speed of air after passing the damping net is evenly distributed, the fastening device is simple and reliable in structure and easy to demount and mount, perforating the cylinder is not required, and sealing problems are avoided.

The invention belongs to the field of injection molding dies, and in particular relates to an integrated high-finish traceless injection molding die core. The integrated high-finish traceless injection molding die core is characterized in that: the upper surface of the die core is provided with a square sunken groove, two pentagonal following water passages are arranged in the die core and positioned at the bottom of the sunken structure, and protruding structural blocks on two sides of the die core and a die core body form a T-shaped structure. A thermal treatment process of the die core comprises the following steps of: pre-heating treatment, pre-sintering and homogenizing treatment, stress removal, oxide reduction, sintering treatment, tempering treatment and cooling treatment. Compared with the prior art, formation of the integrated traceless injection molding die core can be realized, the sealing problem is avoided, medium leakage caused by improper sealing is avoided, and the following water passages of the integrated die core are closer to the surface of a die cavity so that hot and cold media can exchange heat with the surface of the die cavity more fully and quickly.

The invention relates to an immersion-type capillary space protein crystallization chamber. The chamber has a full shock absorption function. The chamber comprises capillary protein solution pools and a porous precipitant solution pool, wherein the protein solution pools are glass capillary of organic or inorganic materials, and the two kinds of pools are communicated through gel plugs being with a volume of 3-5 [mu]m and prepared through gelation of hydrosol containing 0.5-2 % of agarose, thereby forming channels for diffusion and transferring of experimental substances. The capillaries filled with protein solutions and gel plugs are wrapped by foaming adsorption materials, and immersed in the precipitant solution, so that the capillaries are good in shock-absorption and sealing effects, and crystals in the capillaries can be prevented from being damaged by collision. The precipitant solution pool is sealed by a U-shaped metal cover, and the cover is hanged through a square hole on a side surface of the cover and a boss on a side surface of the pool.

The invention relates an impeller of a rotor for a shaftless transmission pump aiming to provide an impeller of a rotor for a pump without a transmission shaft and other related elements. The impeller of the rotor for the shaftless transmission pump comprises a permanent-magnet ring, a mouth ring, blades and a hub; wherein, a small section of protruding thin shaft formed at the two ends of the hub is fixed and hung on the related sliding bearings, a plurality of pairs of N-S magnetic poles are arranged on the external circular cylindrical surface of the permanent-magnet ring on the impeller of the rotor; when a stator of the shaftless transmission pump matching the N-S magnetic poles generates alternating magnetic field, the impeller of the rotor rotates to work; the power which drives the impeller of the rotor to do work comes from the torque power of the permanent-magnet ring thereof so that the impeller of the rotor is not needed to be driven by the pump shaft and has no sealing problem of a rotating shaft, thus optimizing the structure and property of the pump and being particularly applicable to the high-efficiency low-energy consumption zero leakage shaftless transmission pump.

The invention relates to a planet differential type automatic moment varying electric control device. The planet differential type automatic moment varying electric control device solves the problemsthat an existing automobile part automatic frock clamp is complex in structure, and inconvenient to maintain or replace later. The planet differential type automatic moment varying electric control device comprises a fixing bottom seat, a micro motor, a planet wheel assembly, a thread differential motion assembly and a pressure sensor, wherein the planet wheel assembly comprises a sun wheel, an axle type planet carrier and planet wheels, the thread differential motion assembly comprises a top cover, a differential thread sleeve and a differential thread inner gear ring, the sun wheel is connected with an output shaft of the micro motor, the planet wheels are arranged in the peripheral direction of the sun wheel, and respectively engaged with the sun wheel and the differential thread innergear ring, inner teeth of the differential thread inner gear ring are engaged with the planet wheels, an external thread at the top end of the differential thread inner gear ring is engaged with the top cover arranged on the periphery of the differential thread inner gear ring and the axle type planet carrier, an external thread at the bottom end of the differential thread inner gear ring is engaged with the differential thread sleeve, the axle type planet carrier is connected with the top cover through a thread, the top end of the axle type planet carrier stretches out of the top cover, and the pressure sensor is arranged at the bottom end of the differential thread sleeve.

The invention relates to a steam cleaner having a housing which encloses a steam generator with an electrically heated steam boiler for generating steam which can be applied to an object to be cleaned On the surface, wherein the housing has two housing halves that can be assembled together. In order to improve the steam cleaner so that it can meet the requirements of a reliable splash protection in an economical manner, it is proposed according to the invention that the housing accommodates a protective cover extending between the two housing halves, the protection The hood covers the steam boiler.