51 results about "Annular duct" patented technology

A heat exchanger positioned within an annular duct of a gas turbine engine is provided. The heat exchanger extends substantially continuously along the circumferential direction and defining a heat exchanger height equal to at least 10% of a duct height. An effective transmission loss (ETL) for the heat exchanger positioned within the annular duct is between 5 decibels and 1 decibels for an operating condition of the gas turbine engine. The heat exchanger includes a heat transfer section defining an acoustic length (Li), and wherein an Operational Acoustic Reduction Ratio (OARR) is greater than or equal to 0.75 to achieve the ETL at the operating condition.

A heat exchanger positioned within an annular duct of a gas turbine engine is provided. The heat exchanger extends substantially continuously along the circumferential direction and defining a heat exchanger height equal to at least 10% of a duct height. An effective transmission loss (ETL) for the heat exchanger positioned within the annular duct is between 5 decibels and 1 decibels for an operating condition of the gas turbine engine. The heat exchanger includes a heat transfer section defining an acoustic length (Li), and wherein an Operational Acoustic Reduction Ratio (OARR) is greater than or equal to 0.75 to achieve the ETL at the operating condition.

The invention discloses a directional heat dissipation power distribution cabinet with adjustable air deflectors, which relates to the technical field of equipment for power distribution cabinets and comprises a cabinet body and a heat dissipation unit arranged in the cabinet body. The heat dissipation unit comprises a directional heat dissipation assembly used for carrying out fixed-point jet cooling on key heating elements, an air guide assembly used for optimizing overall airflow organization in the cabinet, and a water cooling assembly used for carrying out pre-cooling on cooling airflow of the directional heat dissipation assembly. The directional heat dissipation assembly comprises a fan at least arranged on the top wall in the cabinet body, an air supply pipe communicated with an outlet of the fan, and an annular air pipe arranged in the power distribution cabinet and communicated with the air supply pipe. Through cooperation of the directional heat dissipation assembly and the water cooling assembly, air blown out of the air blowing pipe at the tail end of the telescopic air column is no longer ambient temperature air but low-temperature cold air cooled in advance through the liquid cooling system. According to the pre-cooling type directional air supply mechanism, the heat dissipation efficiency and the limit capacity of air cooling are greatly improved.

To provide a coke dry extinguishment facility and a sloping flue part structure capable of promoting discharge of red-hot coke from a sloping flue part.SOLUTION: A coke dry extinguishment facility comprises a cooling tower including a spare room, a cooling chamber, an annular duct, and a sloping flue part. The sloping flue part includes an annular wall extending upward from an upper end part of the cooling chamber so as to surround a lower end part of the spare room from outside, and a plurality of support walls extending in a radial direction of the cooling chamber between the lower end part of the spare room and the upper end part of the cooling chamber and the annular wall and arranged in a circumferential direction of the cooling chamber. The inner peripheral surface of the annular wall includes an inclined surface expanding outward in the radial direction of the cooling chamber as it goes upward. In a vertical cross-section including one of the support walls, a first intersection at which the inclined surface intersects with an inner peripheral surface of the cooling chamber is located above a second intersection at which a lower end of the one support wall intersects with the inner peripheral surface of the cooling chamber.SELECTED DRAWING: Figure 3

The utility model discloses an annular exhaust device for a pit type heat treatment furnace. The annular exhaust device comprises an exhaust pipeline arranged on a furnace cover, the exhaust pipeline comprises an annular air pipe, an exhaust main pipe rotating section and an exhaust main pipe fixing section which are communicated in sequence; a main support fixed to the ground is arranged on one side of the exhaust pipeline, and the top of the main support supports the exhaust main pipe fixing section. The exhaust main pipe rotating section is connected with the main support through a first rotating connecting mechanism. An air pipe header is arranged between the annular air pipe and the rotating section of the exhaust main pipe, and the air pipe header is connected with the main support through a second rotating connecting mechanism; and the rotating center of the first rotary connecting mechanism, the rotating center of the second rotary connecting mechanism and the rotating shaft of the furnace cover are coaxially arranged. According to the utility model, through symmetrical shunting of the annular air pipe and the rotary connecting mechanism, the exhaust efficiency is improved, the maintenance period is prolonged, the operation process is simplified, and the stability in the synchronous rotating process of the exhaust pipeline and the furnace cover is improved.

The invention discloses a low-altitude high-speed flight manned flying saucer, and relates to the technical field of aviation aircrafts, the low-altitude high-speed flight manned flying saucer comprises a saucer-shaped body, a power device and an undercarriage, the saucer-shaped body is composed of a central bearing ball cabin and a peripheral reinforcing ring coaxially sleeved outside the central bearing ball cabin; the central bearing ball cabin is divided into a celestial navigation and communication cabin, a panoramic cockpit and an environment control and life support system cabin from top to bottom; the inner cabin section of the peripheral reinforcing ring forms a passenger cabin; the bearing strength and the space utilization rate of the machine body are effectively improved through the composite structure of the central spherical cabin and the peripheral reinforcing ring; due to the integrated design of the annular duct and the vector engine, the aerodynamic efficiency and the control flexibility in the vertical take-off and landing and high-speed flight states are remarkably improved; an independent environment control system ensures the safety and comfort of passengers in high-altitude flight; the overall layout gives consideration to functionality and maintenance convenience, and has high practical value.

A heat exchanger positioned within an annular duct of a gas turbine engine is provided. The heat exchanger extends substantially continuously along the circumferential direction and defining a heat exchanger height equal to at least 10% of a duct height. An effective transmission loss (ETL) for the heat exchanger positioned within the annular duct is between 5 decibels and 1 decibels for an operating condition of the gas turbine engine. The heat exchanger includes a heat transfer section defining an acoustic length (Li), and wherein an Operational Acoustic Reduction Ratio (OARR) is greater than or equal to 0.75 to achieve the ETL at the operating condition.

A dual-premixed ammonia burner relates to the field of ammonia combustion equipment. Addressing the problems of high ignition energy, slow combustion speed, poor flame stability, and difficulty in achieving stable combustion in large proportions with ammonia, this invention employs a dual premixing structure of auxiliary fuel gas premixed with ammonia and air premixed with ammonia, combined with a three-stage coaxial air duct and a regenerative pre-combustion chamber to achieve stable combustion. The burner includes an ignition gun, a primary air regulating damper, a secondary air regulating damper, a volute-shaped air casing, a primary air annular duct, swirl vanes, an annular ammonia multi-nozzle header, a pre-combustion chamber, a tertiary air multi-nozzle annular pipe, a flame monitor, and dual ammonia and auxiliary fuel inlets. This invention allows for wide load adjustment from 30% to 100%, no flameout at low loads, high burnout rate, and low nitrogen oxide emissions. It can operate with a large proportion of ammonia or pure gas, features a reasonable structure, reliable ignition, and stable safety, and is suitable for zero-carbon retrofitting and efficient utilization of green ammonia in industrial boilers, kilns, and other thermal equipment.

The invention relates to an accessory gearbox (1) for an aircraft turbine engine, the gearbox (1) comprising a casing (2) that houses an internal air / oil separator (3) comprising a centrifugal separator cassette (30) arranged around a hollow shaft (31) driven in rotation by a drive pinion (38), and an external air / oil separator (4) comprising an external chamber (40) secured to the outside of the casing and housing an air-extraction pipe (41) having an open inlet end (43) fitted with a centrifugal separator dome (45) defining an annular duct (46) in which a filter (47) is positioned; wherein the hollow shaft passes through the casing so as to be rotatably coupled to the centrifugal separator dome and to open into the interior of the air-extraction pipe, thereby placing the interior of the hollow shaft in communication with the interior of the air-extraction pipe.

The utility model relates to the technical field of powder conveying devices, and discloses a powder conveying device for conveying fine particle powder, which comprises a storage bin and a feed port arranged at the top end of the storage bin, and further comprises a spiral powder conveying mechanism fixedly arranged at the discharge end of the storage bin, a dispersion mechanism is arranged at the other end of the discharging pipe and comprises a dispersion bin and an annular air pipe arranged on the outer side of the dispersion bin in a surrounding manner; a dispersion mechanism is arranged in the dispersion bin, and the dispersion mechanism comprises a fixed part fixedly arranged in the dispersion bin; the bottom of the dispersion bin is fixedly connected with a powder outlet pipe, and the bottom end of the powder outlet pipe is fixedly connected with a venturi pipe. According to the powder feeding device for conveying the fine-particle powder, the conveyed powder can be ground and dispersed, powder caking is avoided, the dispersion effect of the fine-particle powder is improved, and the effect of promoting uniform output of the fine-particle powder is achieved.

An apparatus to remove a coating from an edge of a substrate includes a vacuum chuck assembly and a nozzle assembly. The vacuum chuck assembly is configured to support the substrate using suction. The nozzle assembly includes a nozzle head with a pair of nozzle tips configured to direct an angled liquid stream on a surface of the substrate. An annular duct around each nozzle tip discharges a pressurized gas to form a gas shroud around the angled liquid stream.

The utility model discloses a copper-clad aluminum rod single-pulling device which comprises supporting legs, a workbench, a longitudinal carrier roller, a transverse carrier roller, a roller frame, a mold, an installation base, a single-pulling roller, an anti-skid layer, a single-pulling motor, an air compressor body, a dust remover body, a copper-clad aluminum rod, a dust blowing cleaning box structure, an electric cutting box structure and a convenient-to-clean waste chip collecting box structure. The multiple supporting legs are connected to the four corners of the lower end of the workbench through bolts correspondingly. A waste opening is formed in the right side of the middle part in the workbench; the two longitudinal carrier rollers are coupled to the front side and the rear side of the left side of the upper end of the workbench correspondingly. And the two transverse carrier rollers are respectively coupled to the middle upper side and the middle lower side between the two roller frames. Through the arrangement of the annular air pipe, the dust blowing box, the supporting rod, the annular cleaning sponge, the air blowing opening, the quick connector and the air compressor body, the function of cleaning dust on the outer wall of the copper-clad aluminum rod is achieved.

Turbomachine assembly 10) comprising a centrifugal compressor (11) with a rotor (50) having two impellers arranged in a back-to-back configuration, and a diffuser (12) arranged radially opposite the outlet (13) of the rotor (50) with two impellers, wherein the diffuser (12) comprises means (14) for separating the air exiting the centrifugal compressor (11) arranged such that a first airflow exiting a first impeller (15) feeds a first annular duct (16) of the diffuser (12) and a second airflow exiting a second impeller (17) feeds a second annular duct (18) of the diffuser (12). Abstract figure: Figure 1

The present application belongs to the technical field of pipe belt machine, and particularly relates to a pipe belt machine conveying belt cleaning and water removing device, which comprises a rack, a cross partition plate, a roller set of a pipe belt machine, and a circular tubular conveying belt, and further comprises at least one set of cleaning and water removing devices for cleaning and blowing dry the outer surface of the conveying belt, a through hole door is arranged on the cross partition plate, the cleaning and water removing device comprises a cleaning device and a blowing dry device, the cleaning device comprises a plurality of brush rollers which are matched to form annular surrounding cleaning of the outer surface of the conveying belt, and the two ends of the brush roller are rotatably connected with the cross partition plate through a mounting frame; the blowing dry device comprises an annular air pipe which forms annular surrounding of the outer surface of the conveying belt, the annular air pipe is fixedly connected with the cross partition plate through an air pipe frame, and a plurality of blowing ports are arranged on the pipe wall of the side of the annular air pipe facing the conveying belt; by increasing the cleaning brush roller device and the blowing dry device, water stains on the outer surface of the conveying belt are removed, problems such as slippage and torsion of the conveying belt are avoided, and the stability of the pipe belt machine operation is ensured.

The present application belongs to the technical field of cross-medium unmanned vehicles, and particularly relates to a water-air cross-medium running unmanned vehicle, which forms a smooth transition fluid channel through a hemispherical cover, a cylindrical cabin, an annular duct and a conical bottom cylinder, and solves the problems of low power efficiency, large flow resistance, attitude instability and poor reliability in the prior art. The head part is integrated with a detection and rudder control system, and the open rudder cabin can dynamically adjust the water volume to optimize the center of gravity; the middle part adopts an annular duct integrated constraint propeller flow field to improve water-air thrust efficiency, and the center cabin body is integrated with a core control module; the tail part is convergent design to optimize the fluid trajectory. The modules are quickly and reliably connected through piston sealing and rotary buckles. The present application significantly reduces the cross-medium resistance and water outlet time, ensures the smooth attitude conversion, and greatly improves the maintenance convenience and system reliability due to the modularization and high sealing design, and is suitable for various cross-domain operation scenes such as ocean exploration, emergency search and rescue, etc.

A blower (1) for a fuel cell arrangement for recirculating a volume flow generated during the operation of the fuel cell arrangement is described, wherein the blower comprises a blower duct (2) with an outer wall (2a) extending along a duct axis (A) between a blower duct inlet (2b) and a blower duct outlet (2c) of the blower duct (2), a motor shaft (3) extending through an annular duct section (2d) of the blower duct, a flow guide device (4) arranged adjacent to the blower duct inlet (2b) and configured to impart a swirl to the incoming volume flow, a drain duct (5) with a drain duct opening (5a) arranged in the outer wall (2c) through which liquid can be discharged, and a pressure equalization duct (6) fluidically connected to the drain duct (5) and having a pressure equalization duct opening (6a). exhibitswhich is arranged in the outer wall (2a) and spaced apart from the drain channel opening (5a) along the channel axis (A).

The invention provides a humidifier. The humidifier comprises a water tank, a blower device, an atomization device and a shell. An opening is formed in the top of the water tank; the side wall of the water tank is provided with a ventilation duct; the blower device is arranged at one end of the ventilation duct away from the opening; the atomization device is arranged at the bottom of the water tank; the shell sleeves the outer side of the water tank and covers the opening; the side wall of the shell and the side wall of the water tank define an annular air duct communicating with the ventilation air duct. An air inlet communicated with the annular air duct and the opening is formed in the top of the shell; a mist outlet is further formed in the top of the shell. According to the humidifier, liquid in the water tank can be prevented from leaking from the air inlet or the leakage probability can be reduced when the humidifier is in vehicle-mounted working conditions such as bumping and slopes.

Aircraft turbomachine (10) comprising: - an engine (12), - an annular panel (16) which extends around the engine (12), - a structure (14) for supporting the engine (12), - an annular duct (18) for the flow of a gas flow (F12) between the panel (16) and the structure (14), - a mast (20) for connecting the panel (16) to the structure (14), and - a device (22) for fastening the mast (20) to the panel (16), this device (22) comprising a fitting (24) which is fastened by first screws (26) to the mast (20) and by second screws (28) to the panel (16), the first screws (26) being screwed into nuts (32) which are mounted inside at least one internal cavity (40) of the mast (20), this internal cavity (40) being situated radially at the duct (18).

A heat exchanger positioned within an annular duct of a gas turbine engine is provided. The heat exchanger extends substantially continuously along the circumferential direction and defining a heat exchanger height equal to at least 10% of a duct height. An effective transmission loss (ETL) for the heat exchanger positioned within the annular duct is between 5 decibels and 1 decibels for an operating condition of the gas turbine engine. The heat exchanger includes a heat transfer section defining an acoustic length (Li), and wherein an Operational Acoustic Reduction Ratio (OARR) is greater than or equal to 0.75 to achieve the ETL at the operating condition.

The invention relates to an assembly for a turbine engine, in particular for an aircraft, comprising:-an annular duct having a longitudinal axis through which a first fluid is configured to circulate, and-a heat exchanger (3) arranged in the annular duct, the invention relates to a heat exchanger (1) comprising a longitudinal axis (2) and having a front surface (11) inclined in a main direction (A) with respect to the longitudinal axis, the heat exchanger comprising fins (8) extending transversely between two panels (6, 7) arranged facing each other, the thickness of each of the panels being greater than the thickness of each of the fins. According to the invention, the fins are arranged in a plurality of rows transverse to the main direction, and a portion of the fins is elongated so as to form a first deflector (15) configured such that a first fluid entering the heat exchanger via the front surface deflects in a direction substantially parallel to the direction of extension of the fins.

The invention relates to an aircraft turbomachine subassembly comprising an annular duct (36) extending concentrically about a longitudinal axis and in which an air stream flows from upstream to downstream, the annular duct comprising a duct portion (28) defining a swan neck having an upstream inlet section and a downstream outlet section. A plurality of radial arms (B1, B2) extend circumferentially in the duct portion (28). One or several intermediate walls (P1, P2) extend between two circumferentially adjacent arms (B1, B2) which form a pair of circumferentially adjacent arms among the plurality of circumferentially adjacent arms so as to locally separate, between the two arms of the pair of arms, the annular duct portion (28) into a radially inner portion (Ci) and a radially outer portion (Ce) further away from the longitudinal axis than the radially inner portion.

An apparatus to remove a coating from an edge of a substrate includes a vacuum chuck assembly and a nozzle assembly. The vacuum chuck assembly is configured to support the substrate using suction. The nozzle assembly includes a nozzle head with a pair of nozzle tips configured to direct an angled liquid stream on a surface of the substrate. An annular duct around each nozzle tip discharges a pressurized gas to form a gas shroud around the angled liquid stream.

A heat exchanger positioned within an annular duct of a gas turbine engine is provided. The heat exchanger extends substantially continuously along the circumferential direction and defining a heat exchanger height equal to at least 10% of a duct height. An effective transmission loss (ETL) for the heat exchanger positioned within the annular duct is between 5 decibels and 1 decibels for an operating condition of the gas turbine engine. The heat exchanger includes a heat transfer section defining an acoustic length (Li), and wherein an Operational Acoustic Reduction Ratio (OARR) is greater than or equal to 0.75 to achieve the ETL at the operating condition.

The invention discloses a self-adaptive annular air draft system which comprises an annular air pipe, at least two draught fans and a self-adaptive control module, the annular air pipe communicates with a plurality of cabins, and the two draught fans are symmetrically distributed on the two sides of the annular air pipe and further communicate with an outdoor exhaust outlet; the self-adaptive control module is electrically connected with the fan, the self-adaptive control module comprises a plurality of wind pressure sensors and a central controller, the wind pressure sensors are arranged at suction openings of the cabins in a one-to-one correspondence mode, and the central controller is electrically connected with the wind pressure sensors and the fan; the central controller receives wind pressure values detected by the wind pressure sensors and calculates the wind pressure standard deviation, and when the wind pressure standard deviation exceeds a threshold value, the central controller dynamically adjusts power distribution of the two draught fans. The power of the two draught fans is adjusted in a self-adaptive mode to ensure that the air draft amount of each cabin is uniform, a stable and consistent ventilation environment is provided for all the cabins of the ship, and the health of sailors and normal operation of equipment are guaranteed.

The utility model belongs to the technical field of cleaning machines, and particularly relates to a cleaning machine blowing structure and a cleaning machine, and the cleaning machine comprises the cleaning machine blowing structure, a shell, an inner container and an air supply mechanism. The cleaning machine blowing structure comprises an annular air pipe, an annular air duct is arranged in the annular air pipe, air inlet pipes are arranged on the two sides of the annular air pipe, each air inlet pipe is provided with an air inlet and an air supply duct, the air inlets of the two air inlet pipes are supported at the opening portions of the corresponding blowing openings, and the air supply ducts are communicated with the annular air duct. A plurality of air outlets are distributed in the top side of the annular air pipe. The air inlet pipes are arranged on the two sides of the annular air pipe, and when the annular air pipe is installed in the inner container of the cleaning machine, the air inlet pipes on the two sides of the annular air pipe support the air blowing opening of the inner container, so that the overall supporting strength is improved, and the problem of instability is avoided. Due to the fact that the two or more air inlet pipes are arranged, two-side air inlet can be achieved, and the problem that air force of an air outlet far away from an air inlet is insufficient is solved.

A vehicle camera lens cleaning system includes a camera configured to be mounted to a vehicle and including a lens; an ultrasonic cleaning system adapted to vibrate the lens; a source of pressurized air; an air flow passage connected to the source of pressurize air; an annular duct connected to the air flow passage and surrounding the lens, the annular duct having a non-uniform cross section taken in a radial direction from a center of the lens; a plurality of nozzles extending from the annular duct and pointed at the lens; and a controller configured to supply pressurized air from the source of pressurized air to the plurality of nozzles simultaneous with operating the ultrasonic cleaning system.

The utility model relates to the technical field of air bag comb rubber sheet cutting, in particular to a cutting device for air bag comb rubber sheet production, which comprises a vacuum access pipe mounted on a vacuum adsorption table, a moving mechanism arranged on the vacuum adsorption table, a mounting seat mounted on the moving mechanism, and a laser cutting head mounted on the mounting seat. An annular air pipe located on the outer side of the laser cutting head is installed at the bottom of the installation base through a connecting rod, an air inlet pipe is fixedly connected to the annular air pipe, and purging nozzles are installed at the bottom of the annular air pipe in an annular array mode. According to the rubber cutting device, the moving mechanism drives the laser cutting head to move to cut rubber, rubber of any size can be cut according to actual requirements, the universality of the device is improved, high-pressure airflow is guided into the annular air pipe through the air inlet pipe and sprayed out through the purging nozzle while cutting is conducted, melt generated at a cutting point is blown away, and the cutting efficiency is improved. An air cooling barrier is formed in the cutting area, the temperature of the cutting area is reduced, and the thermal shrinkage phenomenon caused by too high rubber temperature at the cutting position is avoided.

The invention discloses a circular array micropore air supply tail end device for a steady-state replacement flow field, and relates to the technical field of air conditioning, the circular array micropore air supply tail end device comprises a plenum chamber type annular pipeline air supply system, a flow equalizing plate, an air inlet pipe, a flow outlet pipe, a flow outlet pipe and an air outlet pipe, and the plenum chamber type annular pipeline air supply system comprises an annular plenum chamber and a flow equalizing plate, the flow equalizing plate is used for realizing conversion from dynamic pressure to static pressure and ensuring uniform distribution of airflow; the fan-shaped efficient air filter is connected to the downstream of the static pressure box type annular pipeline air supply system, the fan-shaped efficient air filter is of a fan-shaped grating-free structure, a filter material of the fan-shaped efficient air filter comprises antibacterial nanometer materials, a frame of the fan-shaped efficient air filter is provided with insertion-pressing type sealing strips, and the design of an annular static pressure box and a flow equalizing structure is beneficial to uniform diffusion of airflow; the combined use of the micropore panel and the adjustable flow guide plate can improve the control performance of the air supply direction; the modularized mounting frame provides convenience for maintenance operation; and the cooperative work of the pressure monitoring and adjusting mechanism is beneficial to maintaining the stability of the device operation.

An annular linear induction pump comprises a casing, an annular duct disposed within the casing, the annular duct having an inner surface and an outer surface, and an electromagnet. The electromagnet can include a center component located within the annular duct and forming the inner surface of the annular duct, a plurality of stators disposed radially around the annular duct, and, a plurality of coils. The annular linear induction pump can be submersible within piping of a nuclear reactor power system.

The utility model discloses cleaning equipment for removing dust on the surface of a photo frame, which comprises a base (1), a dust hood (2) and a dust collection fan (3), a groove (4) is arranged in the middle of the base (1), and a lifting device is arranged in the groove (4); an annular air pipe (5) is arranged on the lifting device, and a plurality of air outlet nozzles (6) are arranged on the outer side face of the annular air pipe (5). Conveying chains (7) are installed at the positions, corresponding to the two sides of the groove (4), of the base (1), and each conveying chain (7) is connected with a moving device. A plurality of moving seats (8) are arranged between the two conveying chains (7), and a through groove (9) is formed in the middle of each moving seat (8); a portal frame (10) is arranged over the groove (4), and a pushing device is arranged on the portal frame (10). The cleaning device not only has a cleaning effect, but also has the advantages of being high in cleaning efficiency, high in working stability, convenient to overhaul, low in labor intensity and high in use flexibility.