55results about How to "Reduce wetted area" patented technology

An absorbent paper sheet is treated with an aqueous wax dispersion such that the sheet includes a fused wax and emulsifier residue in an amount of from about 1 to about 20 weight percent of the sheet based on the combined weight of the fiber, wax residue and an emulsifier residue in the sheet. The fused wax emulsion operates to make at least one surface of the sheet laterally hydrophobic, exhibiting a moisture penetration delay of at least about 2 seconds and less than about 40 seconds as well as a typical contact angle with water at one minute of at least about 50 degrees. There is thus provided absorbent products which exhibit both absorbency and resistance to moisture penetration. The treated sheet further exhibits microbial barrier properties, impeding transfer of bacteria, for example, through the sheet. There are produced tissue products which resist moisture penetration from propelled liquids as well as sequester sorbed liquids in the interior of the tissue.

An absorbent article having a compressed region formed by a compressing process in an absorption layer on a side facing to the backsheet; and a plurality of pressed grooves are formed by a pressing process in the absorption layer on a side facing to the topsheet, within a region opposed to the compressed region.

The present invention provides methods and apparatus for reducing sinkage and wetted surface, and thus hydrodynamic drag of a high-speed boat through the generation of aerodynamic lift while decreasing overall aerodynamic drag. At least one lift-generating front wing proximate a bow section of the boat with at least one corresponding front air channel may be provided. At least one lift-generating rear wing proximate a transom section of the boat with at least one corresponding rear air channel may also be provided. At least one of the wings may be adjustable to generate aerodynamic lift with one of: (1) a neutral; (2) a transom-lifting; and (3) a bow-lifting pitching moment about a center of inertia of the boat. At least one wing proximate the leading edge of the tunnel of a multi-hull boat may be provided to increase the operational envelope.

Aircraft having a lambda-box wing configuration, comprising a fuselage (1), a propulsion system (5), a first pair of swept-back airfoils (2), connected to the top forward portion of the fuselage (1), a second pair of swept-forward airfoils (3), connected to the lower rear portion of the fuselage (1) at a point of the said fuselage (1) aft of the connection of the swept-back airfoils (2), and a third pair of substantially vertical airfoils (4), the tips of the swept-forward airfoils (3) being connected to the lower side of the swept-back airfoils (2) at an intermediate point of the span of the said swept-back airfoils (2), by means of the substantially vertical airfoils (4), the swept-back airfoils (2) having a higher aspect ratio than that of the swept-forward airfoils (3), which makes the swept-back airfoils (2) have a reduced induced drag without penalizing their weight.

A method of noncontact dispensing a viscous material onto a surface of a substrate, which uses a jetting valve having a nozzle directing the viscous material flow in a jetting direction nonperpendicular to the surface of the substrate. The nonperpendicular jetting direction results in the droplet producing a reduced wetted area on the substrate.

The invention discloses a body-variable three-body water wing combined diving boat. The body-variable three-body water wing combined diving boat comprises a main boat body, water wings and side bodies symmetrically arranged on the two sides of the main boat body, and is characterized in that the upper ends of the side bodies are hinged to the main boat body, first hydraulic driving mechanisms for controlling the lower portions of the side bodies to be unfolded or folded are arranged between the side bodies and the main boat body, the foldable water wings are arranged between the lower ends of the side bodies and the main boat body, each foldable water wing is formed by hinging two unit sections, the other ends of every two corresponding unit sections are hinged to the corresponding side body and the main boat body respectively, and second hydraulic driving mechanisms for controlling the corresponding unit sections to be unfolded or folded are arranged between the unit sections connected with the side bodies and the side bodies and between the unit sections connected with the main boat body and the main boat body. The body-variable three-body water wing combined diving boat can adapt to different navigation environments by changing the shape of the structure of the body-variable three-body water wing combined diving boat, the advantages of a traditional submarine and the advantages of a traditional water ship are taken into account, and the body-variable three-body water wing combined diving boat can be navigated underwater and can also be navigated on water at a high speed.

The invention discloses an anti-spattering bow fin of a high-speed ship. The anti-spattering bow fin is arranged at the two sides above the water line of the bow of the high-speed ship; the longitudinal view of the anti-spattering bow fin is a streamline structure with closed wings; an inclined angle Alpha is formed by the closed wing closing the bow and the water line plane and the closed wing deviating the bow is parallel to the water line plane. The horizontal view of the anti-spattering bow fin is a streamline closed wing with a main wing bent downward into a side wing; the main wing closing the bow and the side wing form a water inlet; the horizontal width of the anti-spattering bow fin is reduced progressively from the bow to the direction of the stern; the tail end of the side wing is hooked internally to the ship side; and the main wing deviating the bow and the tail end of the side wing form a water spray outlet. The anti-spattering bow fin has low cost and convenient manufacture, can uplift the body of the high-speed ship when in sailing, improves the sailing posture of the ship, reduces soaking area of the ship body, and further reduces the total resistance of the ship body. The anti-spattering bow fin fully utilizes the energy of spattering flow, plays the role of assisting propulsion to the high-speed craft and achieves the purpose of saving energy of the high-speed craft.

The invention discloses an adaptive continuously-adjustable cavitation device structure. The adaptive continuously-adjustable cavitation device structure comprises a benchmark chassis, a rotatable telescopic assembly and a drive mechanism assembly which are connected with one another, wherein the benchmark chassis and the rotatable telescopic assembly rotate under the power drive action of a servomotor, and the diameter of an outer edge formed by multiple layers of sector part groups in rotating is continuously adjustable along with rotation changes of the servo motor. In the variable speed sailing process of an underwater sailing body, the adaptive continuously-adjustable cavitation device structure provides power through the drive mechanism assembly to drive the multiple layers of sector part groups of the rotatable telescopic assembly to synchronously expand outward or contract inward, and adjusts the drive mechanism assembly according to change situation feedback of hydrokinetic parameters of an external flow field of the sailing body so as to realize adaptive change of the diameter of a cavitation device, thereby completing control for the size and the form of vacuoles, decreasing the wetting area of the underwater sailing body and reducing pressure difference resistance additionally caused to the utmost, greatly reducing frictional resistance and total resistance, and greatly improving the maximum speed and sailing distance of the sailing body.

The invention discloses a composite triple-hulled vessel with aid-to-navigation hydrofoils. The composite triple-hulled vessel comprises a deck, a main vessel body and two side vessel bodies, wherein the main vessel body and the two side vessel bodies are fixedly connected to the lower surface of the deck; the two side vessel bodies are located at the left and right sides of the main vessel body, and a deep-immersed aid-to-navigation hydrofoil is arranged at the tail portion of each side vessel body. According to the composite triple-hulled vessel with the aid-to-navigation hydrofoils, the design ideas of two high-performance vessels which are added with hydrofoils and side bodies correspondingly to be propelled are combined together, while the advantages of a triple-hulled vessel is ensured, the aid-to-navigation hydrofoils added with propelling devices assist the side vessel bodies to propel, so that the turning ability and the maneuverability of the triple-hulled vessel are enhanced, and the lengths of the deep-immersed aid-to-navigation hydrofoils and wave energy recycling hydrofoils are adjusted to change the areas of the hydrofoils, so that the flotation of the triple-hulled vessel in the sailing process is controlled.

The present invention relates to a stain removal device, which enables hands to carry out stain removal operation at steady beating strength and beating speed all the time without fatigue,and can steadily provide liquid for stain removal. The stain removal device(100) comprises: a head part(1),which is provided with a beating face(111); a vibrator unit(2), which eables the head part(1) and the beating face(111) to vibrate in the substantially orthogonal direction by power supply; a liquid holding part(3), which holds liquid, and a water supply way(4), an end(41a) of wihch is connected to the liquid holding part(3) and the other end(1121h) of which opens around the head part(1); with the vibration of the head part(1) caused by the vibrator unit(2), the liquid is provided form the other end(1121h) of the water supply way(4) to around the head part(1).

The invention discloses a large-fault-terrace high-speed planing boat type. The boat bottom of a planing boat comprises a front hull section and a rear hull section; the front hull section is in an arc shape; the two ends of the rear hull section are the same in height and are located at the lowest point of the bottom of the planing boat; the upper portion of the rear hull section comprises a horizontal hull section close to the front hull section; the fault-terrace-type height difference HD exists at the junction of the horizontal hull section and the front hull section, the length of the horizontal hull section is L1, and HD / L1 is equal to 2-4; the rear hull section is straight, and the included angle between the rear hull section and the horizontal plane is alpha 1, and alpha 1 is equalto 4-6 degrees; the boat width of the planing boat is K, and K / HD is equal to 6-8; and the draft of the planing boat is T, and T / HD is equal to 0.7-0.9. Large fault terraces and anti-slip strips aresimultaneously applied to the planing boat type design innovatively, under the condition that the incoming flow speed remains unchanged, a rear hull body provides larger lift, meanwhile, the space atthe tail of a hull can further be effectively enlarged, and cabin layout is facilitated.

The invention provides a stain removal device which can perform removal operation at constant knocking force and knocking speed without making hands tired and can stably provide liquid needed for stain removal. The stain removal device (100) is provided with a head part (1) forming the knocking surface (111), a vibration unit (2) making the head part (1) vibrate in the direction approximately tangent to the knocking surface (111) through power supply, a liquid receiving part (3) for receiving liquid, and a water supply path (4) having one end (41) connected with the liquid receiving part (3) and the other end (1121h) provided with an opening around the head part (1). The stain removal device can form the vibration of the head part (1) caused by the vibrating unit (2), and supplies liquid to the part around the head part (1) from the other end (1121h) of the water supply path (4).

The invention provides a sea condition self-adaption planing boat capable of adjusting forms. The planing boat is composed of a main hull located in the middle and sheets hinged to two sides of the main hull, and the main hull and the sheets are connected through a sheet rotating deploying and retracting device. The sheets on the two sides start at 40% of the length of the boat and extend to a stern, the two sheets are independent, and the deck edges of the sheets are hinged to the main hull. The inner side shape of the sheets is completely attached to the outer side of the main hull, and folding corners are arranged on the outer side. By means of the rotating deploying and retracting device on a deck of the main hull, the sheets can be rotated and self-locked around the hinged position, so that the relative movement of the sheets and the main hull is realized. In response to the sea conditions of different wave levels, the mutual transformation between a single-hull boat form and an M-type boat form of the planing boat can be realized by rotating and deploying and retracting of the sheets, so as to improve the speedability or wave resistance of the planing boat and enhance the ability of the planing boat to complete a task.

The invention provides a ventilating anti-drag support column structure for a supercavity surface vehicle. The ventilating anti-drag support column structure comprises a support column and a ventilating cavitation generating device, the ventilating cavitation generating device comprises gas-holder tanks and cavitators, the gas-holder tank and the cavitator are arranged on the two sides of the support column correspondingly, the gas-holder tanks are provided with ventilating holes, and the gas-holder tanks communicate with ventilating pipelines, and the ventilating holes are formed behind the reverse flow surfaces of the cavitators; the shape of the support column is divided into and upper part and a lower part, the upper part support column has a 45-degree inclined angle and is in an A shape, and the lower part support column is perpendicular to the water surface and is in an H shape; and the front edge line and the rear edge line of the support column form a splay shape outwards. According to the ventilating anti-drag support column structure, the cavitators are arranged on the support column, thus the surface of the support column is covered with cavitation, resistance of the surface of the support column can be greatly reduced by reducing the wet area on the surface of the support column due to the fact that resistance of an object in water is 800 times larger than resistance in air, and thus good anti-drag effect is achieved; and higher speed of the supercavity surface vehicle is achieved, and more fuel is saved in the same main motor power.

The invention discloses an airfoil profile with the sharp leading edge, heavy camber, low Reynolds number and high lift drag ratio, and relates to a low-Reynolds-number airfoil profile. According to the airfoil profile, the maximum thickness meets the relation of d / c=0.09, the maximum thickness position meets the relation of xd / c=0.274, the maximum camber meets the relation of f / c=0.0595, and themaximum camber position meets the relation of xf / c=0.527, wherein c is the chord length of the airfoil profile, d is the maximum thickness of the airfoil profile, and f is the maximum camber of the airfoil profile; and the connection point of the upper surface and the lower surface of the airfoil profile at the leading edge is the coordinate origin, the axis where the chord length of the airfoil profile is located is the x-axis, xd is the horizontal coordinate of the maximum thickness position, and xf is the horizontal coordinate of the maximum camber position. The airfoil profile abandons a blunt head shape of a conventional airfoil profile, and adopts the sharp leading edge, thus the wetting area is reduced, resistance is greatly reduced, and the lift coefficient of the airfoil profile is linearly changed before the stall; and meanwhile, the airfoil profile has the characteristic of heavy camber, a negative pressure area in the upper surface of the airfoil profile is generated through the heavy camber, and thus the characteristic of high lift is achieved.

The invention provides a tailstock type tilting rotor vertical takeoff and landing unmanned aerial vehicle. The tailstock type tilting rotor vertical takeoff and landing unmanned aerial vehicle comprises a vehicle body assembly. The left and right sides of the vehicle body assembly are symmetrically provided with wings. The front end of the vehicle body assembly is provided with a bow cap assembly. The front edge of each wing assembly is provided with a tilting rotor power mechanism. The rear portion of the vehicle body assembly is provided with a tail wing. The tail wing is arranged perpendicular to the vehicle body assembly. The flexibility of the unmanned aerial vehicle is improved through the tilting rotor power mechanisms. Forward momentum for vertical takeoff and landing and level flight is provided for the unmanned aerial vehicle. Air resistance during flight is reduced through flying wing configuration. Yawing of the unmanned aerial vehicle is controlled through the speed differential of left and right propellers. The structure of the unmanned aerial vehicle is simplified in an aileron and elevating rudder combined mode. The tailstock type tilting rotor vertical takeoff andlanding unmanned aerial vehicle has the characteristics of being high in flexibility, good in maneuverability, small in cruise resistance and high in reliability.

The invention discloses a telescopic wing mechanism with slotted flaps and continuously variable wingspans. The telescopic wing mechanism comprises an inner-section main wing, an outer-section main wing, a middle-section main wing embedded between the inner-section main wing and the outer-section main wing; inner, middle and outer flaps which are respectively connected with the inner-section mainwing, the middle-section main wing and outer-section main wing, a first linear motor and a second linear motor which are respectively used for driving the inner-section main wing, the middle-section main wing and the outer-section main wing to move in the spanwise direction, and steering engines respectively controlling the inner-section main wing, the middle-section main wing and the outer-section main wing. The ends of the front beam and the rear beam of the inner-section main wing are connected with a body, the front and rear beams of the wings are arranged in parallel in the unfolding direction, and the three sections of wing main wings stretch out and draw back in the front-rear beam direction and drive the three sections of flaps to stretch out and draw back. Telescopic positioning is achieved through a locking mechanism in the linear motor. Three steering engines are used for controlling folding and unfolding of the wings. The aerodynamic load of the wing is transmitted from theskin to the beam through wing ribs.

The present invention relates to a polyolefin nonwoven fabric longitudinal penetration multiple times hydrophilic agent, characterized in that: the hydrophilic agent is composed of the following components: a. Gemini sulfonic acid group anion / nonionic wetting and penetrating agent 30-40 %, b. Hydroxyphosphate betaine amphoteric surfactant 5-15%, c. Separation multi-subtype non-ionic surfactant 15-25%, d. Weakly hydrophilic gemini-type non-ionic surfactant 30-40% %. The combination of the fast wetting and penetrating type of hydrophilic agent of the present invention and the weakly hydrophilic surfactant can effectively reduce the water-liquid wetted area and side leakage on the surface of the nonwoven fabric to be finished under the premise of meeting the requirements of water permeability. chance, improving the comfort of using absorbent disposable hygiene products.

The invention relates to the technical field of electric vehicle charger protection, and further discloses a safety direct-current long-line charger for the electric bicycle. The safety direct-currentlong-line charger for the electric bicycle comprises a shell; a meshing wheel is movably connected to the interior of the shell; the surface of the meshing wheel is movably connected with a rotatingshaft; the upper end of the rotating shaft is sleeved with a winding rod; a wire is wound on the surface of the winding rod; the surface of the rotating shaft is movably connected with a spring rod; the upper end of the spring rod is movably connected with a light receiving plate; the surface of the spring rod is movably connected with an air bag; the other side of the air bag is movably connectedwith an extrusion rod; the other end of the extrusion rod is movably connected with a push plate; and the bottom of the push plate is movably connected with an extension frame. At the moment, a large-capacity electrolytic capacitor is arranged in the wire, and the current has flowability, so that the current can be attracted by the resistor block and flows into the resistor block, the impact current can be absorbed by the resistor block at the moment, the current can be changed into heat to be dissipated as time goes on, and the effect of weakening the influence of the current on a transformer in the charger is achieved.

The invention discloses a combined type vertical take-off and landing long-endurance electric unmanned aerial vehicle, which belongs to the field of unmanned aerial vehicles. According to the combined type vertical take-off and landing long-endurance electric unmanned aerial vehicle, the fuselage adopts the wing body fusion body, the wetted area of the unmanned aerial vehicle can be reduced by removing unnecessary exposed parts of the fuselage, so that the frictional resistance is reduced, and the lift-drag ratio of the unmanned aerial vehicle is increased by reducing parts irrelevant to lift force in the wing body fusion layout. The winglet is adopted, the end plate effect of the winglet is utilized, and the equivalent aspect ratio of the aircraft is increased under the condition that the wingspan increase is small. The double-tail-boom empennage layout is adopted, the lateral stability of the unmanned aerial vehicle can be improved, and the structural support is good. The lift-drag ratio aerodynamic layout is improved through the structural design of the unmanned aerial vehicle, so that the endurance performance of the aircraft is improved.

The invention relates to the technical field of airplanes, in particular to a flight control method and system based on duck wings and an airplane. The method is applied to the airplane, and the duckwings are telescopically arranged on a front section of an airplane body of the airplane. The method includes the steps that the current flight state of the airplane is recognized; a corresponding control command is generated on the basis of the flight state; and the duck wings are controlled to conduct telescopic motion on the basis of the control command. By the adoption of the technical scheme,the small-sweepback duck wings can be arranged in a low-speed flight state and converted into large-sweepback strake wings in a high-speed flight state, and therefore the low-speed aerodynamic characteristic and the operation stabilization characteristic of a BWB layout are improved under the condition that the cruising aerodynamic characteristic is guaranteed.

A marine vessel that planes over the water in a straight ahead mode and has a V-shaped bow configuration, two lateral rails, a water jet intake aft of the bow, and a water jet discharge through the transom above the water line. The vessel's tri-point contact with the water at high speeds permits sled-like movement with minimal wet area under the hull along the center aft of the water jet intake. It moves fast through the water, is stable, moves smoothly and silently through the water, makes little wake, and makes hard turns without loss of velocity. At idle and slow speed it is low in the water, while at high speed it rides high on the water with only the bow and rear rails in contact with the water. Vessel size and scale are not limiting factors. Applications include, but are not limited to, military, recreational, and sporting uses.

The invention relates to the technical field of multi-rotor unmanned aerial vehicles, in particular to a horizontal landing type multi-rotor unmanned aerial vehicle body box. The horizontal landing type multi-rotor unmanned aerial vehicle body box comprises a polygonal unmanned aerial vehicle body shell; an unmanned aerial vehicle body force bearing box and a battery frame are placed in the unmanned aerial vehicle body shell in sequence; an upper opening cover is also arranged at the upper end of the unmanned aerial vehicle body shell; therefore, a distance sensor module detects that the distance between a landing gear and the ground is less than or equal to a set value, each sliding terminal is in contact with the pavement under an effect of gravity and is rearranged in the vertical direction; each rearranged sliding terminal is matched with each concave-convex position on the pavement in a one-to-one corresponding manner; the distance sensor module transmits a detection signal to a control module; and the control module controls a driving unit to prop against and limit the sliding terminals so that the multi-rotor unmanned aerial vehicle lands in a horizontal state. The problem that the multi-rotor unmanned aerial vehicle cannot horizontally land due to complicated road condition in the prior art is solved.

The invention discloses an adjustable multi-layer hydrofoil catamaran. The adjustable multi-layer hydrofoil catamaran comprises adjustable multi-layer hydrofoils, two pairs of single hulls, auxiliary hydrofoils, propellers and a deck bridge connecting the two pairs of single hulls. Wherein the adjustable multi-layer hydrofoil is arranged between the two pairs of single hulls, the deck bridge is connected with the two pairs of single hulls, and the auxiliary hydrofoils are arranged on the two sides of the single hulls. The invention further provides an adjusting method. The adjustable multi-layer hydrofoils and the two single ship bodies of the catamaran are combined together, the existing advantages of the catamaran are guaranteed, meanwhile, the seaworthiness and rapidity of the catamaran are further improved by adjusting the multi-layer hydrofoils, the lift force of the hydrofoils and the water immersion area and the floating state of the ship bodies are changed by adjusting the depths and the relative positions of the multi-layer hydrofoils, and the ship bodies are more stable. The seakeeping performance of the catamaran is improved, and the purpose of improving the seaworthiness and rapidity of the catamaran is achieved.

The invention relates to an analysis method of hyssopus officinalis volatile oil and application of the hyssopus officinalis volatile oil in preparation of a medicine for treating hormone-resistant asthma, which comprises qualitative and relative quantitative analysis of chemical components of the hyssopus officinalis volatile oil, construction of a hormone-resistant asthma model and grouped administration. The influence of the hyssopus officinalis volatile oil on the number of inflammatory cells in alveolar lavage fluid and peripheral blood of a mouse with the hormone-resistant asthma is researched, and the influence of the hyssopus officinalis volatile oil on the concentration of interleukin-17 (IL-17) and granulocyte colony stimulating factor (G-CSF) in BALF and lung tissues of the mouse with the hormone-resistant asthma is researched. The influence of the hyssopus officinalis volatile oil on pathological changes of lung tissues of mice with hormone-resistant asthma is studied, and the chemical components of the hyssopus officinalis volatile oil and the pharmacological action of the hyssopus officinalis volatile oil for treating the hormone-resistant asthma are integrally evaluated according to the studies. The hyssopus officinalis volatile oil has great significance in new drug research and clinical application of the hyssopus officinalis volatile oil for treating the hormone-resistant asthma.