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

The invention discloses a method for classifying silicon carbide micro powder and classifying equipment of the method, which belong to the technical field of classification of micro powder. The method mainly includes steps that the silicon carbide micro powder sequentially enters at least two classifying machines which are serially connected, each classifying machine is provided with a self-suction sealing device, the classifying precision of each downstream classifying machine is higher than that of the adjacent upstream classifying machine, a cyclone collector is connected with the tail-end classifying machine and collects sorted silicon carbide micro powder; a bag dust collector collects waste discharged from the cyclone collector, and a system is powered by an induced draft fan disposed on a downstream of the bag dust collector. By the aid of the method and the classifying equipment, technical problems that in the prior art, the classifying precision of silicon carbide micro powder is low, extraction rate of fine powder is low, distribution of granularities of finished products is wide are solved. In addition, the method and the classifying equipment are widely applied to finely classifying silicon carbide grains.

The invention relates to a stirring type sample mixing device. A magnetic coupling rotating mechanism and a retractable multistage rotating impeller are mounted on the device; and a stirring shaft of the retractable multistage rotating impeller can extend and retract along the motion of a floating piston. The magnetic coupling rotating mechanism can ensure that a motor output shaft can be separated from the stirring shaft without contact, which basically solves the problems that the complex system solution in the sample mixing device needs to be stirred and the stirring shaft needs to be sealed dynamically when the device is in a full-closed state and guarantees the uniformity and the stability of the complex system solution and the accuracy of the final experimental result.

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 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.

The invention discloses an array style continuous preparation chromatogram system and its using method, the system includes separating part, material transporting part, solvent transporting part, collecting part and controlling part, and the separating part includes array chromatogram column, which is composed of at least two chromatogram columns. When continuously and equably sending into the array chromatogram columns, the feed-in controlling valve is controlled by the controlling computer and controlling closet, simulating circular chromatogram feed-in style switching in turn, periodically, equably feed-in to each chromatogram column, the purging product is collected by special collecting equipment of array chromatogram, controlled by the controlling part, then sending them to the products storing container. The system is suitable to several group continuous large-scale preparation.

A flexible sealing water hammer for driving a pile in water comprises a ventilating pipe, a hydraulic cylinder support, a water hammer cylinder, a guide block, a flexible sealing cabin, an annular rib, an anvil block, a hydraulic cylinder, a flexible lifting chain, a shock absorption cushion and a hammer head. The 'water hammer'effect in the fluid mechanics is applied to a deep water pile driving device, and flexible systems including the flexible sealing cabin, the flexible lifting chain and the shock absorption cushion are ingenuously adopted. By means of the application of the flexible sealing cabin, the problem of motive sealing between the hammer head and the water hammer cylinder is solved, and manufacturing cost is greatly reduced. Meanwhile, the flexible sealing water hammer has the advantages of being low in energy consumption, low in noise, green, environmentally friendly and the like. Therefore, the flexible sealing water hammer has wide application prospects.

The invention relates to a variable-temperature variable-pressure curing device for a well cementing slurry test mold. The variable-temperature variable-pressure curing device comprises a curing box, a temperature-control circulating system and a pressurizing system. The curing box is mounted on the ground through a supporting seat, and a test mold support is arranged at the inner bottom of the curing box. A temperature-control circulating bath cover is arranged outside the side walls of the curing box in a wrapping mode. A sealed cavity is formed between the temperature-control circulating bath cover and the side walls of the curing box. The temperature-control circulating bath cover is provided with a water inlet and a water outlet, and the water inlet and the water outlet communicate with the cavity and are connected with the temperature-control circulating system through pipelines correspondingly. An air inlet is formed in the top of the curing box and connected with the pressurizing system through a pipeline. The variable-temperature variable-pressure curing device has the advantages of being simple in structure, convenient to use and operate, low in production cost, capable of fully simulating the actual underground temperature, and capable of fully simulating the actual underground pressure condition by pressurizing the interior of the curing box through nitrogen, and enabling the cement slurry curing environment to approximate to the actual environment so that test mold performance measuring results can be more accurate.

The invention provides a self-lubricating self-sealing ball socket structure based on a polytetrafluoroethylene material. The self-lubricating self-sealing ball socket structure comprises a female ball body, a male ball body, a polytetrafluoroethylene lining, a male ball body heat insulating layer, a jet pipe diffusion section, a throat lining, a polytetrafluoroethylene lining rear gap, a polytetrafluoroethylene lining front gap and a polytetrafluoroethylene lining limiting step. According to the self-lubricating self-sealing ball socket structure, the self-lubricating performance and the self-sealing performance of the polytetrafluoroethylene material are utilized; meanwhile, the polytetrafluoroethylene material serves as a structural material and combined with the structural characteristics of a swing jet pipe of a ball socket, and the polytetrafluoroethylene lining of a spherical structure is designed to be installed on the portion, on the female ball side, of the contact spherical portion between the female ball body and the male ball body of the swing jet pipe of the ball socket; the structure is simple, the weight is low, and installation and operation are convenient; and the omni-axial swing requirements of the swing jet pipe of the ball socket are met, the dynamic sealing performance and the self-lubricating performance of the polytetrafluoroethylene spherical surface are guaranteed, the effect that the small-toque requirement of the swing jet pipe of the ball socket is met is guaranteed, and the self-lubricating self-sealing ball socket structure has the characteristics of being simple, convenient to use, reliable in work, small in swing torque, high in temperature adaptability and the like.

The invention relates to a high-temperature superconducting induction motor stator. First to sixth parts of the stator structure are respectively placed in first to sixth opened rectangular grooves; first two sixth copper coils are respectively embedded at the notches of the first to sixth opened rectangular grooves; the parts, extending out of the end part of a stator core (1), of the first to sixth copper coils circumferentially and respectively bend along the inner diameter of the stator core (1) so as to prevent end coils from intersection, and cannot contact first to sixth superconducting coils. According to the stator, the problem that relatively large pulsating torque is generated as the arrangement and fixation of the superconducting coils in a stator slot are difficult and the superconducting winding coefficients are too low overcome, superconducting coil fixing frames are prevented from generating eddy-current loss, the superconducting cooling cost is reduced, the volume and weight of a superconducting motor are greatly decreased, and the power factor and efficiency of the motor are improved.

The invention discloses a deep-sea motor based on magnetic coupling transmission and a transmission method. The deep-sea motor based on magnetic coupling transmission comprises a non-magnetic pressure-resistant shell and a magnetic coupling motor; the pressure-resistant shell comprises a body and a cover body, and the magnetic coupling motor comprises a driving assembly and a magnetic coupling output rotor shaft; and a containing cavity is formed in the body, the cover body comprises a cover plate and an inner barrel part protruding towards the inner side face of the cover plate, the magnetic coupling output rotor shaft is installed in the inner barrel part through a bearing, the driving assembly is installed in the containing cavity, the body is covered with the cover plate in a sealed mode, and the magnetic coupling output rotor shaft is in transmission connection with the driving assembly in a magnetic coupling transmission mode. The deep-sea motor based on magnetic coupling transmission does not need a sealing element to carry out dynamic sealing on the output shaft, and the problems of oil leakage and dynamic sealing of the rotary output shaft are solved.

The invention discloses an internal engagement spherical gear pump. The spherical gear pump comprises a front end cover and a rear end cover. The outer surface of the front end cover is provided with a sealing ring gland. A sealing ring is installed between the sealing ring gland and the front end cover. A spherical tooth assembly is arranged between the front end cover and the rear end cover. The spherical tooth assembly comprises a pump body. An outer rotor and an inner rotor are arranged in the pump body. The outer surface of the outer rotor is connected with the inner wall of the pump body through a bearing, and n1 spherical teeth are evenly distributed on the inner surface of the outer rotor in the circumferential direction. A crescent plate is further arranged between the inner rotor and the outer rotor. A positioning pin penetrating the crescent plate is connected with the front end cover and the rear end cover to fix the position of the crescent plate. According to the internal engagement spherical gear pump, the two sides of the spherical tooth assembly are connected with the front end cover and the rear end cover through friction gaskets correspondingly, end face gaps are small, the problem that in the prior art, end face leaks of an internal engagement gear pump are large is solved, the efficiency of the pump can be improved, the rated pressure of the pump is increased, and in addition, the pump can be used in liquid media such as seawater and fresh water with low viscosity.

The invention discloses a mining classification device which comprises a machine body and a discharging opening. The machine body comprises a classification wheel. A second labyrinth ring is mounted above the classification wheel. A first labyrinth ring is mounted above the second labyrinth ring. A gas inlet channel is mounted above the first labyrinth ring. The discharging opening is formed above the gas inlet channel. A variable frequency motor is mounted above the discharging opening. A feeding opening is formed in the left side of an inner barrel. A secondary air inlet device is mounted below the inner barrel and comprises a pore plate. A cover plate is mounted on the right side of the pore plate. A locking device is mounted on the right side of the cover plate. According to the mining classification device, the technical problems about classification precision and sealing between the classification wheel and the machine body are solved; the mining classification device is widely applied to fine classification of solid particles; through the arrangement of an anti-blockage device, the effects that high-precision classification sedimentation can be carried out on ore particles in ore pulp, and the discharging opening is not prone to being blocked by the ore particles are achieved; and the mining classification device is worthy of energetic popularization.

The invention belongs to the related technical field of a sewage pump, and discloses a highly-reliable sealed submarine sewage pump. The submarine sewage pump comprises an inlet shell, a stator steelsleeve, a rubber stator arranged on the inner wall of the stator steel sleeve by pouring, an outlet shell and a cutting tool, wherein two ends of the stator steel sleeve are connected to the inlet shell and the outlet shell respectively, and the cutting tool is arranged in the inlet shell; the inlet shell is trumpet-shaped, and diameter of the inlet shell is gradually reduced from the end, away from the outlet shell, of the inlet shell to the end, close to the outlet shell, of the inlet shell; an outlet is formed in the middle of the outlet shell and communicates with an external high-pressureenvironment; and the inlet shell, the rubber stator and the outlet shell communicate with one another. According to the highly-reliable sealed submarine sewage pump, noise and cost are reduced, and applicability and airtightness are better.

The invention relates to the technical field of motors, in particular to a direct drive motor which comprises a motor shell, an output shaft, a first bearing, a second bearing, a stator assembly, a rotor assembly and a planet wheel assembly. The motor shell is provided with a cylindrical mounting cavity; the output shaft is rotationally arranged on the motor shell through a first bearing; the second bearing sleeves the output shaft; the stator assembly is arranged on the inner wall of the mounting cavity; the rotor assembly sleeves the second bearing; the rotor assembly is located in the stator assembly and is spaced from the stator assembly; the planet wheel assembly is arranged in the mounting cavity and located at the end away from the output end of the output shaft. Compared with a traditional power transmission device (in the form of a motor, a coupler and a speed reducer), the planetary gear set is arranged in the motor, three products are changed into one product, additional coupler installation is not needed, and the complexity of an original power transmission system is greatly reduced.