71results about How to "Reduce flow resistance" patented technology

A nasal dilator includes a contact pad attachable to a user's facial region below the user's eye and outboard from the user's nose. A tugging device is coupled with the contact pad and urges the contact pad in a direction away from the user's nose. With this structure, effective dilation of the nasal passages can be achieved in a comfortable manner. The dilator may also be incorporated into a CPAP mask and/or form part of an automated control system.

The disclosed embodiments related to a component for use in a portable electronic device. The component includes a wall of the portable electronic device, containing an intake zone that includes a set of intake vents directed at a first angle toward one or more heat-generating components of the portable electronic device. The wall also includes an exhaust zone containing a set of exhaust vents directed at a second angle out of the portable electronic device.

A venting system for a fuel tank includes a sorption filter for temporarily storing fuel evaporating from the fuel tank and a delivery device arranged between the sorption filter and an air supply system of an internal combustion engine in a fluid-conducting manner. The internal combustion engine is a turbocharged engine with a turbocharger unit and a throttling device in the air supply system. The sorption filter is connected to the air supply system in a fluid-conducting manner by a first line at a first inlet point arranged upstream of the turbocharger unit and by a second line at a second inlet point arranged downstream of the throttling device. A tank venting valve is arranged in the second line, and the first line branches off from the second line upstream of the tank venting valve in the flow direction towards the second inlet point.

The present invention discloses a light-shielding heat-dissipating mask for a projector. The projector has a light source, a fan, and an air vent. The light-shielding heat-dissipating mask comprises a plurality of metal sheets which are positioned at the air vent for dissipating the heat generated by the light source and decreasing the possibility of the light emitted form the light source escaping out of the air vent.

A blowerless heat exchanger apparatus based on micro-jet entrainment is disclosed. The heat exchanger apparatus incorporates a number of fins regularly spaced apart from each other and parallel to each other, thus letting air currents flow in the space defined between them. A dense array of micro-jet nozzles can be fabricated on the fins surface pointing to the flow direction of the air movement in order to induce increase airflow. The air from an air compressor delivers sufficient airflow on the fins surface utilizing micro-jets entrainment. The micro-jet entrainment confirms strong turbulent around the micro-jets and suggests significant heat transfer enhancement. The turbulence from the micro-jets enhance the heat transfer coefficient, potentially by an order of magnitude, therefore allowing much larger fin spacing and leads to huge reduction of flow resistance and overall power consumption.

Provided herein are systems and methods directed to using renewable energy sources with hot water heating systems.

An electric fan includes a frame (10) having a central tube (11) extending therefrom, a bearing (30) received in the central tube, a stator (50) mounted around the central tube, and a rotor (70) being rotatably supported by the bearing received in the central tube. The frame defines an air inlet (19) and an air outlet (17) at two different sides thereof. The stator includes two poles (51, 53) and a tube (55) arranged between the poles. Each pole includes a basewall (511, 531) and a sidewall (513, 533) extending from the basewall. Each sidewall includes an upper portion adjacent to the air inlet expanding radially along a direction from the air inlet to the air outlet of the electric fan.

The invention relates to a sieve hole air-jetting vortex-induced vibration suppression device and method. The sieve hole air-jetting vortex-induced vibration suppression device is characterized by comprising an air injection pipe, a U-shaped flow guide bent pipe, a bottom air exhaust sieve pipe, an air exhaust sieve pipe, a top air exhaust sieve pipe, an air distribution plate, a base plate and a top plate, wherein the air exhaust sieve pipe is arranged outside a water isolation pipe in a sleeved mode, the air injection pipe leads high-pressure air flow into an annular space between the air exhaust sieve pipe and the water isolation pipe through the U-shaped flow guide bent pipe, the air flow flows out from air exhaust holes in the air exhaust sieve pipe, a seawater streaming boundary layer on the surface of a pipeline is damaged, formation of vortexes of the tail of the pipeline is interfered, and vortex-induced vibration is effectively suppressed. The sieve hole air-jetting vortex-induced vibration suppression device and method can deal with flow in different directions, is not corroded or damaged easily, is put in along with the water isolation pipe in the on-site construction process, does not affect the normal construction process, can be recycled after construction, and saves cost.

A strainer filtering apparatus including a filtering tube providing a substantially larger effective filtering area for its length and width, substantially reducing foreign substances covering a suction surface and flow resistance of the foreign substances, and reducing pressure drop at a cooling water passage. The strainer filtering apparatus includes at least one inlet side into which cooling water is introduced and an outlet side through which the cooling water is discharged, hollow filtering tubes with filtering holes along their lengths, an upper plate having first grooves located at a lower surface and coupled to upper ends of the filtering tubes and an inlet part into which the cooling water is introduced, and a lower plate having punched holes to which lower ends of the filtering tubes are coupled. The cooling water in the filtering tubes is introduced through the punched holes and discharged at the outlet side.

The invention discloses a blank pre-upsetting forming die and a blank pre-upsetting forming method, and belongs to the technical field of material forging. The blank pre-upsetting forming die is firstly designed, a cylindrical blank with a high height-diameter ratio is changed into a blank of which the two ends are frustum-shaped and which is low in height-diameter ratio, and a flat anvil upsetting technology is carried out. For an original blank with a high height-diameter ratio, the original blank is pre-upset by adopting the method in the upsetting forming process to form a cylindrical structure of which the two ends are frustum-shaped; as a contact area between the blank and the die is small, the die slightly hinders the flow of metal on the end part of the blank, and a hard deformation area does not exist, the blank difficultly forms a drum type in the later upsetting process, the deformation is uniform, and the upsetting effect is good. The invention provides a good preprocessing method for upsetting and forming the cylindrical blank with the high height-diameter ratio.

The invention relates to a filter element for filtering fluid for a motor or gearing, comprising a first filter medium which is arranged in a cylindrical way, with the fluid impinging in a perpendicular way on the circumferential surface of the first medium for filtering in an associated filter apparatus, then penetrating and passing through the same. The filter element comprises a second filter medium with a filter density differing from the first filter medium, the first filter medium and the second filter medium being stacked upon each other as filter layers and being jointly wound in a spiral manner. A desired purity of the fluid can thus be achieved more quickly than in filter elements which exclusively allow a radial passage of the fluid through the filter elements. The spiral configuration also achieves a higher dirt absorption capacity.

A cationic copolymer represented by the following formula (I) has a viscosity average molecular weight in a range from 2 million to 10 million. In the cationic copolymer, the mole fractions of three structural units corresponding to three monomers are as follows: x being in a range from 0.01 to 20%, y being in a range from 0 to 15%, and z=1−x−y. When used in the construction of leaking stoppage in an oil well, a cationic chemical lost circulation additive prepared with the cationic copolymer is mixed with an anionic drilling fluid in a section of the wellbore where lost circulation occurs. Then neutral reaction and cross linking reaction occur, so that the viscosity of the resulting mixture rapidly increases to form a space grid structure. This blocks off the leakage path, and thus effects on efficient leaking stoppage in a short time period.

The side profile of a hard drive assembly may be configured with one or more open areas to allow cooling air to pass side-to-side across the hard drive assembly through a lateral flow channel provided by a cavity defined in the base portion of the hard drive assembly.

There is disclosed a flow sensor arrangement, comprising a main channel (1) for conveying a fluid, a bypass (2) connected to the main channel (1) for conveying a portion of the fluid supplied in the main channel (1), and a flow sensor (6) for measuring a flow of the fluid portion in the bypass (2). The bypass (2) branches off from the main channel (1) at an angle (α) of less than 90 degrees between an inlet section (21) of the bypass (2) and a supply section (11) of the main channel (1). By such design means, particles can be prevented from entering the bypass (2) by this adversely affecting the measurements.

A screen section is made with variable resistance to flow in the screen material to balance the flow along the screen length. In one variation different discrete zones have screens configured for different percentages of open area while all have the same particle filtration capability. In another variation discrete portions have differing amounts of overlapping screen portions so as to balance flow without affecting the particle size screened. The cross-sectional shape of a wire wrap underlayment for the screen is made closer to trapezoidal to decrease the angle of opening for the incoming flow paths toward the base pipe. In this manner flow resistance is reduced and flow is increased due to reduced turbulence.

A fluid application device stores seam paste in a reservoir tank 18 and feeds the seam paste to a pressure tank 20 through a feed pump 22. Inside of the pressure tank 20 is maintained under a given air pressure by a pneumatic unit 26, and the seam paste is supplied from the pressure tank 20 to an application nozzle 16 through a supply pipe 24. A level sensor 28 detects fluid level of stored seam paste in the pressure tank 20, and a detection signal is input to a controller 30. The controller 30 controls operation of the feed pump 22 based on the detection signal that is transmitted from the level sensor 28 and also controls a supply amount of the seam paste to the pressure tank 20 to maintain the fluid level in the pressure tank 20 at a fixed level.

The invention discloses a curved pipe type vortex reduction system with a high-radius outlet, and relates to aero-engines. The curved pipe type vortex reduction system comprises a chuck and a plurality of curved vortex reducing pipes. A plurality of curved vortex reducing pipes are uniformly arranged in the circumferential direction of the chuck and are coaxial with compressor discs on the two sides, the curved vortex reducing pipes are the same in structure and mounting radius, each curved vortex reducing pipe is provided with a curved vortex reducing pipe inlet and a curved vortex reducing pipe outlet, and the inlet of each curved vortex reducing pipe faces the airflow direction, so that pressure loss caused when the airflow is separated at the inlet of the vortex reducing pipe to form avortex is reduced, and the outlet position of each curved vortex reducing pipe rotates reversely, so that the circumferential speed of the airflow is limited, the development of free vortexes is inhibited, and the flow obstruction is reduced. Therefore, according to the curved pipe type vortex reduction system with the high-radius outlet, aerodynamic characteristics are fully considered, free vortex development in the radial inflow disc cavity is restrained, meanwhile, dissipation, caused by turning, of airflow is reduced, and pressure loss in the system is reduced.

A ship for use at high speed and/or heavy seas having a single long and slender hull, a sharp bow and the aft end of the hull has a flat or slightly V-shaped bottom with at least one aft rudder, and at least one propeller or water jet for propulsion whereby the foreship has a draught that is equal or more than the draught of the aft end. The bow has a control surface that converts the water flow along the forward moving ship into an adjustable lateral force.

The invention discloses an anti-separation dry sand silo and method. The anti-separation dry sand silo comprises a stock silo and an anti-separation device. The anti-separation dry sand silo is characterized in that the stock silo comprises a feed articulated chute, a feed hopper, a silo body and a discharge valve, the feed articulated chute is fixed on the upper cover plate of the silo body, the silo body mainly comprises an upper cylinder body and a lower cone cylinder body, and the discharge valve is mounted on a discharge pipe at the lower end of the silo body. The anti-separation device comprises a main pipe and a plurality of side pipes, the main pipe is fixed inside the silo body through an upper support and a lower support, the upper end of the main pipe is made to be in butt joint with the feed hopper, and the lower end of the main pipe is hung in the air. The anti-separation dry sand silo and method have the advantages that separation is effectively prevented from being generated on dry sand in the process that the dry sand flows into the silo, the integrated falling down of sand materials in the discharge process of the dry sand silo is achieved, the falling down process is clean and smooth, production cost is saved, and quality of finished mortar products is guaranteed. The anti-separation dry sand silo is simple in structure, good in anti-separation effect, high in operational reliability, and capable of effectively improving quality of finished mortar products, and has wide practicability.

A double-seat valve has a seat-cleaning function and ensures that the seat-cleaning flow is conducted into and out of the leakage hollow space with as little turbulence as possible. The valve reliably prevents a pressure-increasing direct action upon the seat regions, even in the event that the cross-sectional area of the drain bore is smaller than that of the largest pipeline that can be connected to the valve. This is achieved in that a region of extension of the deflection surface that faces away from the radially outer end of the deflection surface delimits the remaining region of the opening in its entirety and opens out from the second closing element at an end-face and radially inner end of the second closing element, facing the first closing element.

An indoor machine of air-conditioner consists of the following components: the shell which is equipped with outer air sucking mouth used for sucking the air heat exchanged outside, and one side of the outer air sucking mouth is open; the baffle which opens and closed the outer air sucking mouth alternatively; the air blast unit which is installed in the shell and force air flow; the flowing separating plate which divides the inner of shell into the part used for installing air blast unit and the outer part, and separates the flowing of the sucked air from the outer air sucking mouth; the zoning plate which is installed on the open surface of shell and divides the inner of shell into the part used for installing air blast unit and the outer part together with the flowing separating plate; the fore grillage which is installed out the zoning plate and is fixed on the open plate of shell, and is formed with the inclined indoor sucking mouth sucking air from indoor and the indoor discharging mouth discharging air out, The invention improves the appearance of the indoor unit, and improve the efficiency of air conditioner through reducing the air-flow impedance when indoor machine discharges and sucks air.

The invention discloses a novel nozzle and fin combined type vortex reduction system, and relates to aero-engines. The novel nozzle and fin combined type vortex reduction system comprises a plurality of reverse rotation nozzles and a plurality of reverse rotation fins, each reverse rotation nozzle is installed at the position of a two-stage gas compressor disc, and each reverse rotation fin is installed at the position of a front-stage gas compressor disc and located at the downstream position of the multiple reverse rotation nozzles; the reverse-rotation nozzles and the reverse-rotation fins are evenly arranged in the circumferential direction of the gas compressor discs and are coaxial with the gas compressor discs on the two sides, the structures of the reverse-rotation nozzles and the reverse-rotation fins are the same, the corresponding installation radiuses are the same, the circumferential speed of airflow is limited, development of free vortexes is restrained, and flow hindrance is reduced. Compared with a vortex reducing pipe, the flow area of the reverse rotation fins is large, sudden expansion and sudden shrinkage of a flow channel in the air entraining process are avoided, therefore viscous dissipation caused by airflow mixing is reduced, and airflow total pressure losses are reduced.

A glass forming apparatus for processing molten glass is disclosed comprising a delivery vessel for delivery molten glass to a forming body through a delivery conduit, the delivery conduit comprising a first portion have a circular cross-sectional shape, a second portion comprising a circular cross-sectional shape and a third portion comprising a non-circular cross-sectional shape. The delivery conduit further comprises a first transition portion coupling the second portion to the third portion, and a second transition portion coupling the third portion to an inlet of a trough in a forming body. Neither an inside bottom surface of the third portion, nor an inside bottom surface of the second transition portion, is lower than a bottom surface of the forming body trough. A method of processing molten glass is also described.