30results about How to "Sealed and compact" patented technology

The invention provides an air inlet structure of an electric propulsion engine, relates to the problem of propellant supply of the electric propulsion engine, and belongs to the field of electric propulsion. The volume of the electric propulsion engine body is greatly reduced, and a propellant supply structure of the engine becomes more complicated. Because an engine gas distributor air inlet pipeline has a high discharge voltage and is in a relatively high working temperature range, a propellant supply pipeline outside the engine is difficultly in direct connection with a gas distributor, otherwise the engine is short-circuited. In order to solve the problem, an electric propulsion engine air inlet structure with sealing and insulating functions is designed. Conical surface extrusion is carried out on a gas distributor pipeline-sealing ring, and an air inlet cavity is formed between an air inlet flange and an engine body flange, so that the one-to-four connection mode between an external propellant pipeline and the engine gas distributor pipeline is achieved, and simultaneously the sealing and insulation requirements on the outer wall surface of the gas distributor pipeline and the engine body flange are met.

The invention discloses a household garbage screening device, which comprises a frame, one end of the frame is provided with a feeding chute, and a plurality of sets of screening units are arranged in the frame, and each set of screening units is respectively connected with a set of power units. Each group of power units includes a motor and a transmission mechanism. Each group of screening units includes a driving roller and a driven roller. One end of the driving roller is connected to the motor, the other end of the driving roller is connected to the transmission mechanism, and the transmission mechanism is connected to the driven roller. The rollers are connected, and the driving roller and the driven roller are respectively provided with a plurality of disks, and the disks on the driving roller and the disks on the driven roller are arranged in a staggered manner. The present invention can effectively prevent the entanglement of soft and long materials such as cloth strips in the domestic garbage when screening the domestic garbage, realize the screening of the domestic garbage while being transported, and improve the sorting efficiency. The invention can reduce maintenance cost and energy consumption, has a compact structure, can reduce dust emission, and reduces environmental pollution.

The invention discloses a multiple sealing carrying roller of a belt conveyor which is applied to the field of bulk material conveying equipment. The carrying roller comprises combined seals, check rings, bearings, isolating rings, bearing seats, a tube and a shaft, press fitting is conducted on the tube and the shaft by the adoption of the double-end seam-allowance-free cold pressing technology, and the two ends are connected into a whole by the adoption of the welding method; the shaft penetrates through the tube and the bearing seats at the two ends, and the isolating rings and the bearings are installed at the two ends of the shaft; the bearings are fixed to the two ends of the shaft through the check rings; the combined seals pass through the shaft and the bearing seats and are installed into the two ends of the shaft in an interference connection mode; each combined seal is composed of a sealing end cover, a sealing shaft cover, an inner sealing ring and an outer sealing ring, each inner sealing ring is installed inside the corresponding sealing end cover, each sealing shaft cover is installed on the flange parts of the left portions of the corresponding sealing end cover and the inner sealing ring, and each outer sealing ring is installed on at right outer edge of the corresponding inner sealing ring. According to the multiple sealing carrying roller of the belt conveyor, the comprehensive property is high, the machining procedures of the carrying roller are decreased, the axial movement is reduced, the sealing property of the carrying roller is improved, the service life is long, and the energy consumption of the belt conveyor is reduced, the cost is saved, and the operation reliability is enhanced.

The invention provides to a magneticfluid sealing device applied to an electric push rod. The magnetic fluid sealing device comprises a positioning piece, a dustproof sealing ring, a first magnetic conductive pole shoe, a non-conductive magnet, a second magnetic conductive pole shoe, and a permanent magnet, wherein the dustproof sealing ring is arranged at the front part of the positioning piece; the permanent magnet, the first magnetic conductive pole shoe and the second magnetic conductive pole shoe are arranged in the positioning piece in parallel; the first magnetic conductive pole shoe and the second magnetic conductive pole shoe are separated through the non-conductive magnet; pole teeth and sealing ring grooves are arranged / formed on / in the inner annular surface of the first magnetic conductive pole shoe and the inner annular surface of the second magnetic conductive pole shoe, and the pole teeth are filled with magnetic fluids. The magnetic fluid sealing device disclosed by the invention is mainly applied between a push rod and an outer sleeve to isolate water, air and pollution damaging factors, and effective waterproof and dustproof effects are achieved.

PURPOSE: A gasoline direct spray engine equipped with a fuel pump set is provided to improve a fixing structure and sealing structure by coupling a sealing member, an adaptor, and a head cover with bolts. CONSTITUTION: A gasoline direct spray engine equipped with a fuel pump set comprises a cam shaft, an adapter(110), a fuel pump(130) and a head cover(120). The cam shaft is formed to the cylinder head(100) and the cam is formed in one side. The adapter is integrated with a cam cap supporting the cam shaft. The adapter is installed to a cylinder head in order to support the cam shaft. The fuel pump is installed to the adapter and pumps the fuel with the rotation of the cam shaft.

The invention discloses a cartridge mechanical seal for an industrial cam rotor pump. The cartridge mechanical seal comprises a shaft sleeve, wherein a moving ring component, a static ring component and a static ring component mounting seat sleeve the shaft sleeve, and the tail part of the moving ring component is hermetically assembled on a step ring at one end of the shaft sleeve; a first mounting groove is arranged in one end of the static ring component mounting seat, and the tail end of the static ring component is hermetically assembled in the first mounting groove; a compensation component is arranged between the tail end of the static ring component and the bottom of the first mounting groove; a second mounting groove is arranged in the other end of the static ring component mounting seat, an oil seal component is assembled in the second mounting groove, and an inner ring of the oil seal component is in sealing fit with the outer side wall of the shaft sleeve; and a driving ring sleeves the other end of the shaft sleeve, and a stop collar is arranged between the driving ring and the oil seal component. The cartridge mechanical seal for the industrial cam rotor pump is convenient to install and maintain, stable in performance and wide in application range.

Based on a light-weight connection method and structure of a driving motor and a speed reducer in a limited space, according to the characteristics of a high-power-density heavy-load electric wheel, the speed reducer and the driving motor of the electric wheel are axially compressed and integrated together in the limited space position, the axial structure size of the electric wheel is reduced, and the overall weight of the electric wheel is reduced; and the overall miniaturization and light weight of the high-power-density heavy-load electric wheel are realized. According to the light-weight connection method and device based on the limited space driving motor and the speed reducer, on the premise that the high-power-density heavy-load characteristic is kept, the structure is more compact, the axial size is shortened, and the weight is greatly reduced.

The invention relates to combined type sealing devices, in particular to a symmetrical low-temperature-resistant combined type sealing device. The invention aims to solve the technical problems of limited sealing performance and reliability, poor environmental adaptability and poor repeatability due to the adoption of end face sealing in an existing dynamic sealing structure. According to the symmetrical low-temperature-resistant combined type sealing device, the end face seal of a liquid seal wheel, the inner end face of the liquid seal wheel and a static ring seal assembly and the floating ring seal are connected in series, the end face seal of the liquid seal wheel and the static ring seal assembly serve as the main seal, the floating ring seal serves as the auxiliary seal, trace leakage media can be discharged through each leakage channel, and the device has the advantages of being compact in sealing structure, high in sealing capacity, high in reliability, large in environment temperature tolerance range, capable of tolerating the low temperature of liquid oxygen, good in repeatability and suitable for high-pressure working environments.

The invention discloses a naval vessel with an energy-saving acceleration mechanism. The naval vessel with the energy-saving acceleration mechanism comprises a vessel body, an acceleration mechanism is arranged in the vessel body, and the acceleration mechanism comprises a motor device; the motor device comprises a rotary motor shaft, a through cavity is formed in the rotary motor shaft, an impeller is arranged in the through cavity, and one end of the rotary motor shaft is connected with a water inlet channel; the water inlet channel is arranged to extend to a vessel bow of the vessel body, and the other end of the rotary motor shaft is connected with a water outlet channel; and the water outlet channel is arranged to extend to a vessel stern of the vessel body, and sealing assemblies are arranged between the rotary motor shaft and the water inlet channel as well as between the rotary motor shaft and the water outlet channel correspondingly. After the naval vessel is improved, the weight of the vessel body is lowered, so that the naval vessel is more convenient and rapid to accelerate and more stable to operate in the accelerating process.

The invention discloses a sealing mechanism for a water pump. The sealing mechanism for the water pump comprises a water chamber positioned in the water pump, a driving shaft which extends into the water chamber and is used for driving an impeller of the water pump, an oil chamber positioned at the outer side of the driving shaft, and a sealing device which is arranged between the water chamber and the oil chamber and used for performing shaft sealing on the driving shaft; the sealing device comprises a first framework water seal and a second framework oil seal which are axially arranged from outside to inside; a first lip port for sealing the water chamber is arranged at the first framework water seal; a second lip port for sealing the oil chamber is arranged at the second framework oil seal; the first lip is provided with a polytetrafluoroethylene coating. According to the sealing mechanism for the water pump, the water chamber side is subjected to shaft sealing through the first lip port; the first lip port can be effectively prevented from being worn according to the wear resistance, the high temperature resistance and the low frictional coefficients of polytetrafluoroethylene, and moreover, the water sealing effect is good; the first framework oil seal is arranged at the oil chamber side and used for sealing the oil chamber; the sealing structure is compact, and the assembling is easy, so that the production efficiency can be improved.

The invention provides an air inlet structure of an electric propulsion engine, relates to the problem of propellant supply of the electric propulsion engine, and belongs to the field of electric propulsion. The volume of the electric propulsion engine body is greatly reduced, and a propellant supply structure of the engine becomes more complicated. Because an engine gas distributor air inlet pipeline has a high discharge voltage and is in a relatively high working temperature range, a propellant supply pipeline outside the engine is difficultly in direct connection with a gas distributor, otherwise the engine is short-circuited. In order to solve the problem, an electric propulsion engine air inlet structure with sealing and insulating functions is designed. Conical surface extrusion is carried out on a gas distributor pipeline-sealing ring, and an air inlet cavity is formed between an air inlet flange and an engine body flange, so that the one-to-four connection mode between an external propellant pipeline and the engine gas distributor pipeline is achieved, and simultaneously the sealing and insulation requirements on the outer wall surface of the gas distributor pipeline and the engine body flange are met.

The invention discloses a comb tooth shaped elasticity self-adaptive sealing structure, which comprises a rotating shaft, a shell as well as a shaft bush and an annular sealing disc which are arranged between the rotating shaft and the shell, wherein the shaft bush is sleeved with the annular sealing disc; a sealing cavity is formed in the inner wall, towards the shaft bush, of the sealing disc; a wearable sealing ring is filled in the sealing cavity; multiple sealing plugs and spring elements are arranged between the wearable sealing ring and the sealing disc; the wearable sealing ring and the shaft bush are kept in contact through an oblique thrust by virtue of the sealing plugs and the spring elements; a packing is arranged between the wearable sealing ring and the rear wall of the sealing cavity; and the sealing disc is tightly pressed and fixed on a casing through a pressing device, and at least one rubber sealing washer is arranged at the attaching surface between the sealing disc and the shell. The comb tooth shaped elasticity self-adaptive sealing structure is good in sealing performance; the effect of the sealing structure can be compounded with those of a labyrinth type seal and a wearable seal; and besides, the sealing structure is compact, convenient to machine and assemble, good in universality and wide in application scope, and needs no modification of an original shaft structure.

The present invention relates to an electronic control device for automobiles. The electronic control device of the present invention is characterized in that it includes: a cover and a base for accommodating an electronic control unit; and a connector, which is combined with the electronic control unit; Protrusion, the electronic control substrate is inserted between the anti-protrusion of the cover and the edge of the base, and a protrusion is formed on the base at the rear end of the edge where the cover and the base meet each other. The raised portion is connected to the raised portion of the base by the cover, and a predetermined space into which a sealing member can be inserted is formed between the front end and the rear end.

The invention is suitable for the technical field of electric energy meters, and particularly relates to an electric energy meter and a key sealing component thereof. The component comprises a meter cover, a key embedded in the meter cover and an elastic element, wherein the key comprises a key cap and a key pillar protruded out of the inner surface of the key cap; the meter cover is provided with an accommodating cavity which is protruded inwards and used for accommodating the key cap and part of the key pillar; a through hole is formed in the bottom of the accommodating cavity; the key pillar passes through the through hole; the elastic element is elastically supported between the key cap and the bottom of the accommodating cavity; a convex ring encircling the key pillar is outwards protruded out of the bottom of the accommodating cavity; a sealing sleeve is sleeved on the peripheral wall surface of the convex ring; and the sealing ring is used for sealing the ring opening of the convex ring. According to the component, a sealed structure is formed by arranging the sealing sleeve and is well waterproof; and the structure is simple and compact, and the production cost is saved. Furthermore, a sealing ring is provided; and therefore, water cannot penetrate into the component from the through hole, and the waterproof capacity is further improved.

The invention discloses a large-sized high-temperature and high-pressure rotary joint, and relates to a rotary joint for a large-sized drying machine. The large-sized high-temperature and high-pressure rotary joint is structurally characterized by having a sealing structure consisting of a steam shaft of a central jacketed pipe and three groups of spherical dynamic and static rings; sealing surfaces between the spherical dynamic and static rings are compressed through springs on spring guide pillars on a steam side and a condensate side respectively, and the steam side and the condensate side are separated fully; steam flows through the jacketed pipe while the condensate flows through a central pipe; the central jacketed pipe rotates along with drying machine equipment, and a shell is connected with a steam pipeline and a condensate pipeline; the steam is introduced into the steam pipeline while the condensate is drained from the condensate pipeline. Secondly, various states of the dynamic and static sealing ring are compensated by the springs in a using state, and an auxiliary filler sealing device is designed, so that the accidental damage caused by leakage of a large amount of steam after wear of concave and convex rings is prevented. A three-end-face sealing technology is adopted, so that the sealing structure is compact and reliable, can adapt to the working condition of high-temperature, high-pressure and large-size sealing, and is long in service life.

The invention relates to a shaft sealing method for automatically sealing spiral rotor of a vane pump, characterized in that corresponding to shaft sealing point, a pump shaft segment is installed with an automatic sealing device composed of driving and driven spiral rotors, in the pump operating course, depending on the generated inertia force, under the action of the driving spiral rotor, following the driving and driven to generate radial relative angle displacement and simultaneously making axial two-way displacement so as to separate from and combine with pump body shaft sealing point, and in the place of the sealing end surface, implementing no fixed end surface contact as the pump operating and automatic sealing as stopping. It is novel and special, reliable to operate, safe and convenient to use, energy-saving, low-cost, and wide-application range.

The invention discloses a centrifugal microfluidic chip reagent packaging structure, which comprises a packaging cavity; a cover plate movably assembled at the upper end of the packaging cavity, wherein a plurality of plugging blocks are arranged on the cover plate, and the plugging blocks are in one-to-one correspondence with reagent outlets of the packaging cavity; an elastic piece which is arranged between the cover plate and the packaging cavity; and a shell which is arranged on the cover plate and the packaging cavity in a sleeving manner. The plugging blocks are integrally formed on thecover plate; wherein the cover plate and the packaging cavity move relative to each other, so that the plugging blocks on the cover plate can close or open the reagent outlets of the packaging cavity.The plugging blocks do not need to be installed on the reagent outlets one by one, installation is easy and convenient, installation stability is high, the whole sealing structure is compact, use isconvenient, cyclic utilization can be achieved, and resource waste is reduced.

The invention discloses a full-disk multi-plate dry-type adjustable parking brake, which comprises a brake housing, a piston housing and a disc spring support cover which are sequentially fixed and installed on the rear end of the brake housing through fasteners, the brake housing, The piston housing and the disc spring support cover form a closed cavity, and the friction plate group, the piston and the disc spring assembly are installed in the cavity in sequence from front to back, and the disc spring assembly is suitable for pushing the piston to press the friction plate group to achieve Braking; a disc spring adjustment pad is provided between the front end of the disc spring assembly and the piston, and a housing adjustment pad is provided between the brake housing and the piston housing. By adjusting the disc spring adjustment pad and the piston housing The thickness is suitable for compensating the wear of the friction disc pack. The invention has good integrity and high braking efficiency. In actual use, the parking braking force can be adjusted in various ways according to the needs without redesigning. The structure design is simple and the manufacturing cost is low, and it can be adapted to different vehicle types. , with broad application prospects.