321 results about "Labyrinth seal" patented technology

The invention relates to the technical field of isolation of a compression cavity and a bearing of a liquid spraying screw compressor, and discloses an isolation sealing structure and method for the compression cavity of the screw compressor. Comprising a compressor main body, a compression cavity arranged in the compressor main body, a bearing and a rotor shaft mounting channel penetrating through the two ends of the compression cavity, a rotor shaft penetrating through the bearing and the rotor shaft mounting channel, and a bearing mounted at the end part of the rotor shaft, four skeleton sealing elements are sequentially arranged between the compression cavity and the bearing along the axial direction of the rotor shaft to form a three-stage isolation cavity; the four framework sealing pieces comprise the first framework sealing piece and the second framework sealing piece which are close to the compression cavity, and the third framework sealing piece and the fourth framework sealing piece which are close to the bearing. The durability and the reliability of the sealing structure are remarkably improved by adopting the combined design of the multi-stage framework sealing piece and the labyrinth sealing assembly. A three-level isolation cavity is formed through the arrangement of the four framework sealing pieces, a compression cavity and a bearing cavity are effectively isolated, and the possibility of medium leakage is reduced.

The piston sealing assembly for the reciprocating type oil-free labyrinth seal compressor comprises an air cylinder, a piston is arranged in the air cylinder, a rotating groove is formed in the outer side wall of the piston, a rotating mechanism is arranged in the rotating groove, and a piston is arranged in the rotating mechanism. And the rotating mechanism comprises a rotating cylinder, two push rods, two extension springs, two extrusion inclined blocks, two pushing springs, two stop blocks and two limiting inclined blocks, a plurality of fixing grooves are formed in the outer side wall of the rotating cylinder and the outer side wall of the piston, and a plurality of piston rings and supporting rings are fixed into the fixing grooves correspondingly. According to the piston sealing assembly for the reciprocating type oil-free labyrinth seal compressor, the multiple piston rings and the multiple supporting rings are arranged, cavity labyrinth seal is formed between the multiple piston rings and between the multiple supporting rings, in this way, non-contact seal is formed, mutual abrasion and cylinder rubbing are avoided, and the piston sealing assembly can adapt to long-period operation of the compressor; and faults which cannot be repaired in a long period are eliminated.

A sealing mechanism for a rotating mechanism, a rotating mechanism and a sealing method. The rotating mechanism comprises a rotor having a rotary disk (1) and a stator accommodating the rotor. The sealing mechanism comprises a first flow-blocking portion (4), which protrudes and is provided on an end face of the rotary disk (1), wherein a labyrinth seal and a spiral seal are provided in combination at the first flow-blocking portion (4); and a first corresponding flow-blocking portion (5), which is recessed, is provided on an inner surface of the stator and is in clearance fit with the first flow-blocking portion (4). The first flow-blocking portion (4) has a first recessed portion and / or protruding portion (6) on a circumferential surface thereof, the first corresponding flow-blocking portion (5) is flatly constructed or provided, on a circumferential surface thereof, with a first corresponding protruding portion and / or recessed portion (7) which are / is in clearance fit with the first recessed portion and / or protruding portion (6), and the first flow-blocking portion (4) and the first corresponding flow-blocking portion (5) form a labyrinth seal at the corresponding top or bottom section thereof respectively and form a spiral seal at a corresponding side section respectively, which can further suppress fluid leakage, thereby improving the sealing performance.

The invention is suitable for the technical field of grinding, and provides an electric drive intelligent constant force radial compensation system which comprises an intelligent electric radial floating grinding device, the intelligent electric radial floating grinding device comprises a dust cover and a linear motor in the dust cover, and the linear motor is composed of a motor stator and a motor rotor. A grinding tool is arranged at the output end of the linear motor, a fixing base is installed on one side of the linear motor, a cone swinging device and an adjusting ring are installed on the fixing base, and the grinding tool and the cone swinging device are sealed in a labyrinth mode and provided with a labyrinth sealing outer ring and a labyrinth sealing inner ring. According to the scheme, the stability of driving force is improved, the mechanism design is optimized, the response speed for responding to external force changes and sealing are achieved, meanwhile, the influence on output torque is reduced to the minimum, the yield of high-precision polishing can be greatly improved, the polishing technological process is simplified, and the polishing efficiency is improved.

The invention relates to the technical field of speed reducers, in particular to a special speed reducer for tire machinery, which comprises a box body, output shafts, flow guide assemblies and labyrinth seal assemblies, the output shafts are horizontally arranged on both sides of the box body, and the flow guide assemblies sleeve both sides of the box body and are positioned on the peripheries of the output shafts; a flow guide cover is vertically arranged on one side of the flow guide assembly, the flow guide cover is connected with the two sides of the box body through bolts, and a labyrinth sealing assembly is arranged in the flow guide cover and located on the periphery of the output shaft in a sleeved mode. By additionally arranging the directional lubricating mechanism, in the working process of tire machinery, the speed reducer synchronously utilizes rotating, flow guiding and spraying modes to conduct auxiliary lubricating on a worm and gear meshing area, meanwhile, positive pressure air sealing is combined, the sealing effect of the speed reducer can be improved, external dust entering a lubricating system inside the speed reducer is reduced, and the service life of the speed reducer is prolonged. The lifting device is suitable for driving a working platform to lift in tire machinery, thereby improving the use effect.

A compressor is provided for use in domestic appliances. The compressor includes: an impeller including an inlet, an outlet, a hub defining a rotational axis of the impeller, a plurality of impeller blades that extend from the hub, and a shroud that at least partially surrounds the impeller blades; a housing that at least partially surrounds the shroud and that is coaxially arranged with respect to the rotational axis of the impeller to allow the impeller to rotate within the housing; a leakage flow path defined between the shroud and the housing leading from a leakage flow path inlet to a reinjection port, and a labyrinth seal arrangement provided in the leakage flow path. The labyrinth seal arrangement includes one or more shroud rings interdigitated with one or more housing rings so as to form a tortuous flow path for fluid flowing through the leakage flow path.

An enclosure is provided with a first area and a second area, wherein the enclosure has an outer opening to the first area, an intermediate opening or a labyrinth seal is formed between the first area and the second area, and wherein the outer opening has a larger cross-section than the intermediate opening in the case of the intermediate opening.

The utility model relates to the technical field of precious metal smelting, in particular to a mounting structure for a driving part of a driving roller of a pressurized copper material removal banded extruder. The transmission mechanism comprises a main shaft, a mounted bearing, a chain wheel thrust ring, a chain wheel, a mounting seat, a gear, a labyrinth seal and a driving roller are sequentially mounted on the main shaft in a penetrating manner from left to right, the mounting seat is of an annular structure with a middle protrusion, the middle protrusion penetrates through the chain wheel, and the chain wheel is fixedly mounted on the mounting seat through a pin bolt and a pin nut. And a chain wheel thrust ring is arranged at the end part of the chain wheel, is fixed with the chain wheel through a bolt, and is movably connected with the mounting seat through a clamping groove. According to the installation structure, when overload torque is input into the chain wheel or a hard object is clamped between the driving roller and the driven roller meshed with the driving roller, the pin bolt is cut off, and therefore the spindle head of the spindle is protected against deformation. The utility model provides the structure which is easy to install, convenient to maintain, simple in structure and low in cost, and ensures that the pressurized copper material removal extruder stably runs for a long period.

The invention relates to the technical field of fluid conveying, and discloses a high-sealing-performance rotary joint and a preparation technology thereof.The rotary joint comprises a rotary joint body I and a rotary joint body II which is rotatably arranged, and a leakage early warning structure is arranged on the rotary joint body I; the structure comprises an early warning channel, a liquid accumulation groove used for collecting a trace amount of leaked fluid and an observation window installed outside. A two-way labyrinth type sealing structure is arranged on the outer side of the thrust ball bearing, so that the environmental adaptability is improved; according to the manufacturing technology, after assembly is completed through a low-temperature stress-free method, in-situ final machining is conducted on the device under the dynamic standard, specifically, a thrust ball bearing of the device serves as the dynamic standard to drive the rotating joint body II to rotate, and final micromachining is conducted on the dynamic sealing face. According to the invention, the assembly accumulative error is fundamentally eliminated, the dynamic sealing surface with ultrahigh geometric accuracy is obtained, the sealing performance and the operation safety of the rotary joint are obviously improved, and the service life of the rotary joint is obviously prolonged.

An enclosure is provided with a first area and a second area, wherein the enclosure has an outer opening to the first area, an intermediate opening or a labyrinth seal is formed between the first area and the second area, and wherein the outer opening has a larger cross-section than the intermediate opening in the case of the intermediate opening.

The application discloses a three-form bidirectional sealing structure, relates to the technical field of sealing, and solves the problems that in the prior art, the two sides of sealing are different media, the two sides of media are prohibited from being mixed, if the media are connected in series, the product performance is affected, under high-temperature weather conditions, there is thermal expansion phenomenon, under rain and snow weather conditions, external liquid flows into the product, and under bad environment, wind sand and dust invade, which can cause adverse effects on the product, and the specific scheme is as follows: a three-form bidirectional sealing structure, comprising a shaft and an end cover, the end cover is arranged on the circumferential side of the shaft, a sealing ring is arranged between the end cover and the shaft, a felt is arranged between the end cover and the sealing ring, the sealing ring body extends in the axial direction to form a medium sealing ring on the two side surfaces of the end cover, a plurality of protrusions are arranged on the medium sealing ring, a plurality of recesses are arranged in parallel at the positions corresponding to the protrusions of the end cover, and the recesses and the protrusions are in clearance fit to form a labyrinth seal and a non-contact clearance seal.

The invention relates to the technical field of molten iron, and provides a molten iron stirring device which comprises a bottom plate, a stirring barrel is fixedly connected to the top end of the bottom plate, a second supporting frame is fixedly connected to the top end of the stirring barrel, a power assembly is installed at the top end of the second supporting frame, and an injection assembly is installed on the portion, close to the bottom end, of the stirring barrel. A sealing assembly is installed at the center of the bottom wall of an inner cavity of the stirring barrel, a first supporting frame is fixedly connected to the top end of the bottom plate and located on the outer side of the stirring barrel, a conveying assembly is installed at the top end of the first supporting frame, a gear drives a supporting plate to rotate under limitation of the supporting plate, and the supporting plate drives stirring blades to rotate through stirring rods. And the stirring rod drives the movable ring to rotate on the supporting ring, the first gear ring and the second gear ring are designed in a staggered mode to form labyrinth sealing, and meanwhile the first gear ring rotates in the static ring. By means of the technical scheme, the technical problem that in the related technology, the efficiency is low when molten iron is desulfurized is solved.

The present invention discloses a water-proof vertical chemical slurry pump transmission assembly, comprising a pump shaft, a bearing bushing, a bearing, a bearing housing, a bearing gland, and a locking nut; the locking nut comprises an annular retaining groove on the lower plate surface of an annular connecting plate and a plug-in structure of a positioning ring on the upper end of the bearing bushing and the upper plate surface of the bearing gland, so that a structure similar to a labyrinth seal is formed therein; at the same time, a skeleton oil seal is provided between the bearing bushing and the bearing gland to further improve the sealing effect; an O-ring is provided between the compression positioning surface of the lower plate surface of the bearing gland and the front end portion of the bearing housing, so that rainwater at the bearing housing will not penetrate into the bearing housing along the compression positioning surface of the bearing housing; at the same time, an annular drainage groove and a radial drainage hole are provided on the compression positioning surface of the bearing housing, which are connected to a small hole outside, and some accumulated rainwater can flow out through this hole. Through the mutual cooperation of the above components, a complete sealing structure is formed to prevent water from entering the bearing housing.

The invention relates to a method for producing a labyrinth seal (1) for sealing a sealing region (2) between a rotor and a stator of a rotating machine, in which method a seal carrier (8) and a sealing element (3) are produced, the sealing element (3) having a convex sealing ring (4) which is arranged opposite the rotor surface, the sealing element (3) and the seal carrier (8) are connected to one another in a form-fitting manner.

The utility model discloses a vacuum pump sealing structure, aims at solving the deficiency that particulate matter enters the sealing surface when vacuum pump is running, influences the sealing effect. The utility model discloses one side of vacuum pump sets up side cover and back cover, and the oil cavity is formed between side cover and back cover, installs the shaft and bearing seat on the side cover, installs the bearing between bearing seat and the shaft, installs the labyrinth seal ring and the shaft sleeve on the shaft, and the shaft sleeve is on the labyrinth seal ring and the bearing inner race between, installs the sealing lip between the shaft sleeve and bearing seat, sets up a plurality of circles of the labyrinth ring groove on the side of labyrinth seal ring, sets up a plurality of circles of the labyrinth convex ring on the side cover, and the labyrinth convex ring is inserted with the labyrinth ring groove. The vacuum pump sealing structure can block the particulate matter, avoid the sealing lip and the contact of particulate matter, improve the sealing effect, and be favorable to prolonging the service life of sealing element.

The present application relates to the technical field of soft coal seam drilling, and discloses an intelligent control drill rod and blowout hole device for soft coal seam drilling, which comprises a front-end sensing unit, a relay sensing unit, a hydraulic servo motor, a frequency converter, a shape memory alloy framework, a thermal-responsive polymer expansion gel layer and a control unit. The device can expand to 3 times the original diameter within 2 seconds through thermal triggering, forming a multi-stage labyrinth seal. The control unit is installed with an embedded AI chip to run an LSTM pressure time sequence prediction model, and combines temperature and vibration multi-source data fusion to judge the blowout risk level, solving the problems of lack of real-time gas pressure dynamic monitoring capability of traditional drill rods, reliance on artificial experience to judge blowout risk, and response lag. The single position pressure sensor is easily disturbed by local rock layer mutation, has a high false alarm rate, and cannot distinguish between normal pressure fluctuations and blowout precursors, so the device realizes early blowout warning and actively suppresses blowout accidents.

This invention provides a sealing system for the output shaft of an amphibious vehicle side reducer, comprising a primary sealing assembly, a secondary sealing assembly, a tertiary sealing assembly, and a pressure relief and drainage assembly. A labyrinth seal formed by the oil baffle ring and oil seal seat filters and blocks large abrasive particles, increasing the sealing path and thus extending the intrusion time of impurities. A felt ring further seals the system, filtering out fine abrasive particles from the impurities. Multiple oil seals work together to seal against seawater and powdery sludge. When seawater and sludge reach the cavity outside the multiple oil seals through the primary and secondary seals, a one-way valve opens when the pressure inside the cavity reaches a preset value. At this point, the seawater and sludge can be discharged through the drain hole, reducing the risk of seal failure due to pressure and wear. Through this multi-stage sealing and pressure relief design, seawater and flowing sludge in the seawater can be effectively prevented from entering the side reducer cavity, thus preventing damage to the side reducer.

A labyrinth seal assembly (40) for an aircraft turbomachine (10), comprising a rotor (42) surrounded by a stator (44), the stator (44) comprising an abradable element (48) surrounding the rotor (42) and defining an annular passage (P) around the rotor (42), the rotor (42) comprising rotor blades (46) extending radially outwards and passing through said passage (P) to limit the flow of an operating gas stream (F3) from upstream to downstream in said passage (P), characterized in that it further comprises, at said passage (P) and upstream of all the rotor blades (46), stator fins (50) projecting radially inwards from the abradable element (48) and profiled to axially straighten said gas stream (F3) by downstream of the stator fins (50). Figure for the abbreviation: Figure 2

The invention relates to a light-weight TPcon special solder strip annealing device which comprises a box body and a cooling water tank fixed to the surface of the box body, an upper annealing wheel, a third wheel and a driven wire passing wheel are rotationally arranged on the surface of the box body, and the driven wire passing wheel is located in an inner cavity of the cooling water tank. According to the special light-weight TPcon solder strip annealing device, a dynamic labyrinth sealing structure composed of a fluororubber sealing sleeve, an adjustable movable plate and a partition plate is arranged and combined with a gas storage tank buffer gas supply system, on the premise that a solder strip continuously penetrates through the dynamic labyrinth sealing structure, multiple zigzag gas leakage paths are formed, the gas leakage resistance is greatly increased, and the service life of the solder strip is prolonged. According to the system and the method, by matching with a micro-positive pressure environment maintained by the gas storage tank, 'on-demand supplementation 'is realized, most of nitrogen is sealed in the system for cyclic utilization, only extremely small leakage amount needs to be supplemented, and compared with a traditional continuous purging mode, more than 90% of nitrogen consumption can be saved, and the production cost is remarkably reduced.

The utility model provides a non-contact sealing protective structure, which relates to the technical field of machine tool spindles and comprises a spindle rotator, a spindle non-rotator, a protective cover, an end cover, a central spindle, an inner labyrinth ring, an outer labyrinth ring and an air curtain ring groove. The main shaft rotating body is located in the main shaft non-rotating body, the protective cover is installed on the outer side of the end cover, the protective cover and the main shaft rotating body are fixed through a bolt, the end cover is arranged on the periphery of the shaft core in a sleeving mode, the end cover and the main shaft non-rotating body are fixed through a bolt, and an air curtain ring groove is formed by the end cover and the main shaft non-rotating body. The inner labyrinth ring serving as a part of a main shaft rotating body is combined with the outer labyrinth ring serving as a part of a main shaft non-rotating body; according to the non-contact type sealing protection structure, the sealing performance of the main shaft under the severe machining environment is effectively improved by comprehensively applying the labyrinth sealing technology, the dynamic pressure sealing technology and the air curtain sealing technology, and the normal service life and the machining precision of the main shaft bearing are guaranteed.

The invention relates to an inflatable rotary kiln sealing device, which belongs to the technical field of industrial kiln equipment, and comprises a static housing with an opening and a dynamic kiln body capable of rotating relatively, which are connected through a sealing assembly, the sealing assembly comprises an annular frame rotationally connected to the outer wall of the dynamic kiln body, a first annular blocking piece fixedly connected to the outer wall of the annular frame and a second annular blocking piece fixedly connected to the outer wall of the dynamic kiln body, and a circumferential positioning sealing mechanism, a plurality of axial positioning sealing mechanisms and an airtight sealing mechanism are arranged on the annular frame. The circumferential positioning sealing mechanism and the axial positioning sealing mechanism are used for restraining the motion freedom degree of the dynamic kiln body and forming sealing, and the airtight sealing mechanism is used for forming an airtight barrier for isolating the internal environment and the external environment. The labyrinth seal with the trumpet-shaped opening is arranged, the inert gas is injected to form the high-pressure air curtain, non-contact type two-way air seal is achieved by means of the gas dynamics and the differential pressure principle, and gas channeling and dust invasion are effectively blocked.

Turbine assembly according to the present invention has passages formed in the fixing part of the second wheel of the assembly between at least some adjacent blades for draining the working medium that has leaked through the non-contact seal of the first wheel of the assembly from the axial gap further in the direction of expansion of the working medium back into the primary flow path. The passage inlet according to the present invention is located on the side of the fixing part facing the labyrinth seal of the preceding wheel radially between a virtual circle with the centre in the turbine assembly axis and a radius of R8in−0.6*A and a virtual circle with the centre in the turbine assembly axis and a radius of R8out+0.6*A, where R8in is the inner and R8out is the outer radius of the radial gap of the last fin of the non-contact seal, and A is the axial distance between the last fin of the non-contact seal and the side of the fixing part of the next wheel facing the non-contact seal of the preceding wheel in operation. The passage outlet according to the present invention exits into the primary flow passage between the blades at an axial distance of at least ⅕ of the total axial width of the blade cascade from the leading edge of the blades.

The invention discloses a power rotor and a radial labyrinth sealing type wave rotor structure with the power rotor, labyrinth ring grooves are formed in the opposite outer wall surfaces of two seat plates of the power rotor, and the labyrinth ring grooves are used for being matched with labyrinth sealing pieces to prevent radial clearance leakage airflow of the wave rotor structure; the wave rotor structure comprises a power rotor, a stator casing and a labyrinth sealing piece, the stator casing is provided with an inner cavity for installing the power rotor, the labyrinth sealing piece is provided with an outer cavity for installing the power rotor, and the outer cavity is provided with an outer cavity for installing the labyrinth sealing piece. A radial leakage gap is formed between the base plate and the top wall or the bottom wall of the inner cavity close to the base plate, the end, away from the center hole, of the acting cavity channel communicates with the radial leakage gap, the labyrinth sealing piece is located in the radial leakage gap and detachably connected with the stator casing, and the labyrinth sealing piece is matched with the labyrinth ring groove and used for blocking leakage airflow of the radial leakage gap. Efficient sealing of the radial clearance of the radial flow type wave rotor is achieved, the structure is reasonable, and operation is reliable.

The utility model relates to agricultural wheel hub unit technical field, and disclose a kind of agricultural wheel hub bearing unit framework oil seal, this agricultural wheel hub bearing unit framework oil seal, including outer framework, the outer framework outside closely adheres to wheel hub inner hole inside, outer framework baffle is provided at outer framework one end, and the other end of outer framework is connected in inner sealing lip inside. The agricultural wheel hub bearing unit framework oil seal, in order to make sealing effect better and improve the service life of oil seal body, by being provided with outer framework, inner framework, outer sealing lip, inner sealing lip, outer sealing end face small lip, outer framework baffle, compression spring, cavity and sealing body, to have labyrinth seal effect, and three main lips are designed as 10 ° inclination, both have the resistance ability of strong resistance to external foreign matter, significantly improve the strength and reliability of dustproof function, in turn can make sealing effect better and improve the service life of oil seal body.

The invention relates to the technical field of material precision machining equipment, and discloses an ultra-high-speed cutting type precision grinding machine which comprises a rack, a driving device, a grinding cavity provided with a feeding port and a discharging port, and a rotary movable cutter assembly and a fixed static cutter assembly which are arranged in the grinding cavity and driven by a main shaft. And a combined sealing structure is arranged at a relative motion interface between the rotary moving cutter assembly and the fixed static cutter assembly and comprises a non-contact labyrinth seal and a contact mechanical seal which are sequentially arranged in the potential leakage direction of materials. Through the combined sealing design of labyrinth sealing and mechanical sealing, multiple barriers are arranged on a key material leakage path, the labyrinth sealing dissipates material kinetic energy in advance and blocks most materials, and the mechanical sealing provides final reliable end face sealing, so that the leakage rate is reduced, coarse and fine materials are effectively prevented from being mixed, and the sealing effect is improved. And extremely high particle size uniformity and consistency of the ground product are ensured.

The present disclosure relates to the field of material sorting, and particularly relates to a protective box body and a controller box body, wherein the protective box body is used for protecting the controller, and the protective box body comprises: a shell used for accommodating the controller, the shell comprising a bottom plate and four side walls; at least one air inlet, at least one air outlet and a plurality of cable ports for cable passing through are arranged on the side walls of the shell; a top cover covers the open end of the top of the shell and is detachably connected with the shell through buckling, and a labyrinth seal structure is formed at the connection between the shell and the top cover, which is used for preventing sundries from entering the inside of the shell. Both the connection stability during normal use and the subsequent installation, maintenance or replacement of the controller are ensured, and the operation and maintenance efficiency is improved. The protective box body can effectively protect the controller while having air flow channels for heat dissipation, can effectively prevent sundries such as dust and water vapor from entering the protective box body, is beneficial to prolonging the service life of the controller and reducing the maintenance cost.

The application discloses a liquid film thrust disc sealing structure and relates to the technical field of thrust disc sealing technology. The thrust disc sealing structure comprises a mounting seat, one side of the mounting seat is used for mounting a thrust disc body, and the other side of the mounting seat is provided with a dynamic ring. An end cover assembly is internally provided with a static ring matched with the dynamic ring. One side of the dynamic ring opposite to the static ring or one side of the static ring opposite to the dynamic ring is provided with a dynamic pressure groove, so that a liquid film with a certain thickness is formed between the dynamic ring and the static ring, no-friction operation is realized, the labyrinth sealing of the unit thrust disc is replaced, and the continuous operation cycle of the unit is prolonged. The thrust disc assembly comprises the liquid film thrust disc sealing structure and the thrust disc body, and the thrust disc body is installed on the side of the mounting seat far from the static ring. The screw compressor comprises the thrust disc assembly, and the continuous operation cycle of the unit can be prolonged.

The application relates to the technical field of sealing joints, in particular to a sealing joint for a high-pressure hydrogen gas conveying pipeline, which comprises a male connector seat, a female connector seat and a valve core group, the joint ends of the male connector seat and the female connector seat are respectively provided with lock plates and flange joint plates, the outer periphery of the flange joint plate is provided with wedge locking blocks and screw rods, the opposite surfaces of the lock plate and the flange joint plate are respectively provided with first sealing ring groups and second sealing ring groups, the surface of the lock plate is provided with a sealing gasket, the valve core group comprises a core shaft, a spring, a valve sleeve and a guide head, and a gradually tapered section, a throat section and a gradually expanded section flow channel structure are formed between the valve sleeve and a flow channel. The male connector seat and the female connector seat are quickly locked and connected through the wedge locking blocks, a composite sealing structure is formed through labyrinth sealing and elastic sealing, the static pressure of a joint jointing area is reduced through the Venturi effect, the hydrogen gas leakage driving force is reduced, a multilayer leakage prevention mechanism is formed, and the sealing joint has the advantages of good sealing performance, high connection stability and suitability for high-pressure hydrogen gas conveying working conditions.

The utility model discloses a powder cooling and transferring device for a rotary kiln, which comprises a cooling machine, a gas-collecting hood sleeved on the body of the cooling machine, a labyrinth seal structure arranged between the cooling machine and the gas-collecting hood, a hopper fixedly connected with the bottom of the gas-collecting hood, a K-type thermocouple and a level gage arranged inside the hopper, an ash discharge port arranged at the bottom of the hopper, and a gas discharge port arranged at the bottom of the hopper. The ash discharge port is connected with a first screw conveyer, and the first screw conveyer is connected with a second screw conveyer; by arranging the labyrinth sealing structure, abrasion of the gas collecting hood caused by powder scouring is effectively avoided, negative pressure fluctuation is reduced, the electric gate valve can enable the whole hopper to be in a totally-closed state in the operation process, the silicon carbide coating can reduce scouring abrasion of high-temperature materials to the hopper and the labyrinth sealing structure, and the service life of the hopper is prolonged. The K-type thermocouple and the level gage can upload measured data to the PLC in real time, and interlocking control is facilitated.

The utility model relates to ultra -fine powder production technical field, concretely relates to a kind of grading device of ultra -fine powder dry grinder. Including machine body seat, the middle position of machine body seat upper side wall is fixed with powder outlet pipe, the inside of machine body seat is provided with grading assembly, the grading assembly includes the assembly pipe vertically fixed in the inside of powder outlet pipe, the upper end of assembly pipe is through powder outlet pipe side wall and extends out, the inside of assembly pipe is coaxially rotationally arranged with main shaft by bearing, the upper end of main shaft extends to the outside of assembly pipe and is provided with driving mechanism, and the driving mechanism is used to drive main shaft rotation. The utility model, through the combination of gland and inlay ring to form labyrinth seal structure, and in its inside filling high-temperature grease constitutes airtight sealing barrier, so that the dust in powder outlet pipe cannot invade assembly pipe inside through labyrinth seal structure, simultaneously in avoiding bearing surface dust accumulation, thereby significantly prolong the service life of bearing in dust environment.