50results about How to "Change flow" patented technology

The invention relates to a compressed-air energy-storage system. A three-position four-way valve is arranged in a pipeline of a compression part and an expansion part of the system and the flowing condition of air in the system is changed by utilizing the feature of change of a turn-on state of the three-position four-way valve, thus the variation of the manners of serial-connection and parallel-connection between a gas compressor and a turbine is realized, and the overall working efficiency is increased. With the adoption of the three-position four-way valve, on one hand, the overall flexibility of the compressed-air energy-storage system is improved, so that the operating of the system is more targeted, and the use of the compressed-air energy-storage system matched with various types of power stations is facilitated; and on the other hand, the service condition of turbomachinery is improved, and the optimized configuration of the turbomachinery according to the needs of energy storage and power generation can be realized.

A dispensing device for milk and/or milk foam is provided that includes a mixing device for mixing steam, milk and/or air. A mixing device may include a chamber, a first line for the supply of milk into the chamber, a second line for a supply of steam into the chamber, a third line for the supply of air into the chamber, at least one outlet for dispensing the milk and/or the milk foam from the chamber, a valve including an adjustable regulating shaft for regulating the supply of milk and/or air into the chamber. By adjusting the regulating shaft between different predetermined positions at least one flow of milk may be switched on and switched off and/or altered and a flow of air may be switched on and switched off and/or altered. A dispensing device may further include a drive motor for adjusting the regulating shaft of the valve and a control device for controlling the drive motor. The regulating shaft may be movable by controlling the drive motor by means of the control device intorespective predetermined positions.

The invention relates to the technical field of aluminum alloys, in particular to equipment for producing an aluminum alloy hollow casting ingot and a method of the equipment. The equipment for producing the aluminum alloy hollow casting ingot comprises a core die, a crystallizer, a bracket and a dummy ingot, wherein the core die is positioned at the center of the crystallizer and is concentric with the crystallizer; the bracket arranged on the crystallizer is used for supporting the core die; the dummy ingot is arranged at the lower part of the core die; a space between the core die and the crystallizer is a die cavity; the core die is designed into a taper with a large upper part and a small lower part; and the size of the taper is 1-30 degrees; a cooling system and a lubricating system are arranged in the core die; a coil is arranged in a water chamber of an aluminum sleeve of the crystallizer; and a shunt and a stop block are arranged on the crystallizer. According to the equipment for producing the aluminum alloy hollow casting ingot and the method for the equipment disclosed by the invention, a friction force between the casting ingot and the die core in the hollow casting process of the aluminum alloy is reduced and the core locking and breakout are avoided.

The invention relates to a heat exchanging pipe with reinforced heat transfer elements. The reinforced heat transfer elements are of a water-drop-shaped streamline type, or are in a triangular pyramid shape or a semi-oval-ball shape, and are distributed on the inner wall of the heat exchanging pipe in a scattered mode. When the inner surface of the heat exchanging pipe is spread, the reinforced heat transfer elements are distributed on the inner wall of the heat exchanging pipe in a triangular shape or distributed in a mode that a plurality of triangles are combined or distributed in the mode that the reinforced heat transfer elements can be divided into a plurality of triangles. The water-drop-shaped streamline type is that the heads are round and the tails are pointed, the heads are opposite to the fluid direction, and the tails are arranged in the fluid direction. The pointed heads of the triangular-pyramid-shaped reinforced heat transfer elements are opposite to the fluid direction, and the wide heads of the triangular-pyramid-shaped reinforced heat transfer elements are in the fluid direction. By means of the heat exchanging pipe, the heat transfer efficiency can be improved, formation of deposit layers on the inner surface of the heat exchanging pipe is reduced, and the heat exchanging pipes can be applied to the conditions of high temperature, high pressure and processing solid impurities or deposit matter in the pipe, and is especially suitable for industrial furnace pipes under high-temperature conditions.

The invention discloses a combined bionic anti-abrasion H-shaped fin elliptical flue gas heat exchange tube which comprises more than two rows of elliptical tubes in the flowing direction of gas and fins arranged on the two sides of the elliptical tubes, wherein a plurality of pairs of semispherical dimples are arranged on the windward sides of the fins; first through holes penetrating through the fins are formed in the bottoms of the semispherical dimples; a plurality of eddy generators are arranged on the leeward sides of the fins; a through hole adjacent to each eddy generator is formed in one side of the eddy generator. According to the flue gas heat exchange tube, the elliptical tubes are used as base tubes, the fins are arranged on the inner two sides of the elliptical tubes, the semispherical dimples and the eddy generators are arranged on the fins, and by the dimples, the flowing resistance can be effectively reduced to avoid the formation of large eddy turbulence in a flow field; in addition, by the novel combined fin structure, the comprehensive heat exchange efficiency can be effectively improved, and tail soot formation and tube abrasion can be greatly reduced.

The invention discloses an electrolytic polishing agent which comprises the following aqueous solutions according to massic volume concentration: 890-1280g/L of phosphoric acid, 168-340g/L of sulfuric acid, 20-50g/L of AL<3 plus> and 1-5g/L of a coupling agent. The electrolytic polishing agent is used for regulating the ratio of phosphoric acid to sulfuric acid, and the corrosivity of the polishing agent is also effectively reduced through adding aluminum stearate, so the quality of the electrolyzed workpiece is enabled not to be influenced. The viscosity of the electrolytic polishing agent is increased by adding the coupling agent, the gas flow which is released during the electrolytic process can be changed, and is enabled not to leave gas marks on the workpiece which is electrically polished, so a polished surface can be uniform and complete, and has no defects.

The invention discloses a bionic winglet structure capable of changing streaming of a leading edge airfoil surface of a flapping-wing aircraft, which relates to the field of structures of aircraft wings. The structural characteristics, the movement mode and the aerodynamic performance of the flapping-wing aircraft completely imitating small wing feathers of birds are provided, so that the aerodynamics of the flapping-wing aircraft is effectively improved, and the stall delay effect is achieved by changing the flow around the leading edge airfoil surface; the bionic winglet structure capable of changing the streaming of the leading edge airfoil surface of the flapping-wing aircraft enables the aircraft to take off and land more steadily. The bionic winglet structure comprises a pair of winglets and a winglet control mechanism; the two winglets are symmetrically arranged along the aircraft body and synchronously rotate under the driving of the winglet control mechanism. The flapping-wing aircraft has good aerodynamic performance and streaming characteristic in the flight process, the stall delaying function can be achieved, and due to the special structural design, the weight increased by the mechanism and the rotational inertia increased by wings can be ignored.

The invention relates to an air deflector (4) intended to be mounted under a motor vehicle, in front of a wheel of said vehicle, with a view to reduce the aerodynamic drag at said wheel, wherein said air deflector (4) comprises: an angled front surface (12) having a concave profile ; two side surfaces (14; 14') on either side of the front surface (12), respectively; wherein at least one of the two side surfaces (14; 14') has a concave profile. The invention also relates to a vehicle comprising at least one such air deflector (4).

The invention discloses a conical disc rack of a disc centrifugal machine. The conical disc rack of the disc centrifugal machine comprises a conical disc rack body, positioning boards, a disc and neutral holes, and is characterized in that the conical disc rack body (1) is conical, the ring diameter of the conical disc rack body is gradually decreased from bottom to top, and the conical disc rackis formed. Materials pass through the neutral holes (4), are separated by the disc (3), and flow out between the positioning boards (2). By controlling the cross section area of a light-phase fluid runner to be gradually increased, the volume in the runner is increased, the inner diameter of the disc and the pressure distribution of fluid in the interval of the disc rack are changed, accordingly flowing of the fluid in the interval of layers of discs is improved, distribution of the fluid in the interval of the layers of discs tends to be uniform, and thus the purpose of improving the separation efficiency is achieved.

A method for controlling the temperature of a polymer melt in an extrusion tool includes flowing the polymer melt via at least one flow channel from an input to an output and around at least one temperature-control element in the at least one flow channel. The temperature control element includes a plurality of temperature control units. The temperature of the polymer melt flowing around the temperature-control element is controlled by individually controlling each of the temperature-control units so as to vary a degree of temperature control of the temperature-control element such that a degree of temperature control is controllable to be the same or different at locations throughout the temperature control-element.

The invention provides a near-physiological pulsating flow loading device for an intravascular stent fatigue test, and belongs to the technical field of medical instruments, and the near-physiological pulsating flow loading device for the intravascular stent fatigue test comprises a simulated blood vessel which is provided with a detection section for placing a stent to be tested; simulation liquid is suitable for circulating in the simulation blood vessel; a loading device which is internally provided with multiple sections of simulated blood vessels; the detection section of the simulated blood vessel is arranged in the loading device; according to the near-physiological pulsating flow loading device for the fatigue test of the intravascular stent, the pressure and the flow which are similar to the physiological state received after the stent is implanted into the human body are provided. The pulsating pressure enables the simulated blood vessel to generate periodic expansion and contraction deformation, and provides a compression acting force for the stent; the pulsating flow provides pulsating fluid shear force for the stent. The device more accurately simulates the real state of the intravascular stent in the blood vessel of the human body, and solves the near-physiological pulsation loading problem in the fatigue test of the intravascular stent.

The present invention provides a motor with good ventilation properties. The motor comprises a motor winding. Each two adjacent teeth of the motor winding are provided with a ventilation channel. The technical points of the ventilation channel are that: a near shaft of the ventilation channel is arranged between two adjacent teeth of the motor winding, the remote shaft is extended to the outside of the motor winding, and deflected to one side to form a ''>'' type with the near shaft, and a prism are arranged between two adjacent shafts of the ventilation channel. According to the motor with good ventilation properties disclosed by the present invention, the ''>'' type formed by reverse deflection of the remote shaft and the near shaft of the ventilation channel is used to change a flow direction of the gas inside the motor, so that ventilation of the gas inside the motor is improved, convection is enhanced, and an effective cooling purpose is reached; and the prism is further added between the remote shaft of the ventilation channel to change flow condition of the fluid, thereby reducing eddy current losses, and enabling a flow form of the fluid to be better.

The invention relates to a transfusion plastic bottle double-color combined cover and an exhaust structure of an injection mold thereof, aims to solve the technical problem that air trapping is caused by disorderly flowing of an elastomer body in an injection molding process of the double-color combined cover, and belongs to the technical field of injection molding of medical transfusion plastic bottle double-color combined covers. The transfusion plastic bottle double-color combined cover is characterized in that a central shaft is used as a circle center of the upper part of the elastomer body, a plurality of water stopping grooves which are equally distributed uniformly are formed in a position near the periphery of the elastomer body, reinforcing ribs which are connected with a combined cover body are placed among the water stopping grooves, and space between each water stopping groove and a liquid isolating film and space between each water stopping groove and the inner side wall of an upper cavity are filled with an elastomer body (TPE) material; and in the injection mold of the double-color combined cover, an insert is in sleeve connection with a heat nozzle sleeve, water stopping ribs are placed on a surface, which is connected with the elastomer body, of the insert, the overall dimension of each water stopping rib is matched with the dimensional of a cavity of the corresponding water stopping groove in the elastomer body, and the water stopping ribs and the water stopping grooves not only guide the injection molding elastomer body material to flow orderly, but also guide air in the upper cavity to be discharged from air discharge grooves of an inner side surface and an outer side surface of the insert of the injection mold.

The invention discloses a human resource capital transaction management system, which comprises a system assembly. The system assembly comprises a supply and demand system, a transaction system, a supervision system and a legal affair system. Compared with the prior art, the system has the advantages that the contradiction between supply and demand of talents is macroscopically and effectively solved; from the aspect of talents, the talents depend on a platform and exist in an independent capital form, and the talents can flow as required; from the aspect of an employment unit, the expected value created by a traditional unit using talents is changed into the value directly achieved by solving the actual problem through the talents, the irregular behavior that the employment unit excavatesthe talents everywhere to grab the talents is changed, and the talents are more direct, more effective and lower in cost; from the aspect of talent service, a talent resource capital platform is established, a stage is provided for talents to play a role and achieve value, and the talents can play a role more advantageously; from the aspect of resource benefits, the talent utilization rate is increased, the labor cost is reduced, and an opportunity is provided for talent value change.

The invention relates to a heat exchanger for exchanging heat between a first material or material flow and a second material or material flow, comprising at least one wall that separates the materials or material flows, wherein the surface of the wall has an arithmetic mean roughness Ra of 2 to 20 [mu]m, preferably 10 [mu]m, or a roughness depth Rz of 10 to 50 [mu]m, preferably 30 [mu]m.

The invention discloses a rolling method for a rectangular isotropous stainless steel ring piece. The rolling method includes the steps that firstly, a stainless steel rod is heated to the forging temperature to be upset, punched and pre-rolled, and a rectangular ring blank is manufactured; and secondly, the rectangular ring blank is put into a ring rolling machine, a conic roller is lifted up by 5 mm to 10 mm, the rectangular ring blank is inclined, then rolling forming is conducted, and the rectangular stainless steel ring piece is obtained. By the adoption of the method, the flowing direction of materials in the rolling process is changed, and isotropous mechanical performance of the rectangular ring piece is kept the same, so that the comprehensive mechanical performance of the rectangular ring piece is improved. The method is used for producing the rectangular isotropous stainless steel ring piece.

The invention provides a small-scale threshing and separating device suitable for rice and oilseed rape in hilly and mountainous areas. The small-scale threshing and separating device suitable for therice and the oilseed rape in the hilly and mountainous areas comprises an open roller, a top cover located above the open roller, and a grid-type concave screen located below the open roller; and theopen roller comprises a roller shaft, a feeding head, a plurality of toothed bars and a plurality of wheels, the feeding head and the wheels are sequentially installed on the roller shaft in a crop feeding direction from front to rear, a plurality of rounds of adjusting holes are formed in the wheels, the toothed bars are installed on the wheels through the adjusting holes, the toothed bars are evenly distributed in a peripheral direction with an axis of the roller shaft as a center, and a plurality of rasp bar board tooth groups and spike tooth groups are sequentially arranged on the toothedbars in the crop feeding direction. The small-scale threshing and separating device suitable for the rice and the oilseed rape in the hilly and mountainous areas can be suitable for threshing and separating of the oilseed rape and the rice in the hilly and mountainous areas, and has the advantages of being low in threshing loss ratio and high in cleaning ratio.

The invention discloses a rubber mixing and extruding device which comprises a main extruder and an auxiliary extruder, the main extruder and the auxiliary extruder are in right-angle butt joint, and the main extruder fully mixes a rubber compound with a vulcanizing agent and an accelerant or sulfur-containing rubber master batch which are uniformly compacted by the auxiliary extruder and then mixes the rubber compound at a low temperature; the main screw is composed of a main mandrel and a main screw head, and the auxiliary screw is composed of an auxiliary mandrel and an auxiliary screw head. The feeding section and the mixing section are of single-head thread structures with the same thread section and are large in thread pitch, the compaction section is of a single-head thread structure with the small thread pitch, the transmission pressurization section and the transmission pressure reduction section are each of a gradual change type thread structure, the depth of a thread groove of the mixing section is small, two-way threads are machined on the surface of the mixing section, and the reverse mixing section is of a double-head two-way thread structure. The spiral groove depth of the reverse mixing section is deeper than that of the mixing section; the main extruder compacts materials through the small-pitch compaction section, the auxiliary extruder is pressurized and compacted through the flow channel with the flow decreasing gradually, and the mixing effect is enhanced through the combination mode of the gradually-changed threads of the transmission pressurization section, the pin and the internal threads of the machine barrel.