32results about How to "In line with the law of flow" patented technology

The invention belongs to a field of the visual simulation of a flood routing. Aiming at realizing the three-dimensional dynamic whole-process simulation of the storm surge and the flood routings, the safety management of seawalls, a quick scientific assessment of the storm surge disaster, and the scientific formulation and the implementation of rescue and relief work, the technical scheme provided is the three-dimensional dynamic whole-process simulation of the storm surge and the flood routings, comprising the following steps: (1) establishing three-dimensional mathematical models of the storm surge and the flood routings in complex flooding areas; (2) drawing bathymetric charts of the storm surge and the flood submerging in complex flooding areas (3) dynamically simulating liquid phase flows of the storm surge and the flood routings in complex flooding areas; (4) carrying out the dynamics calculation of the storm surge and the flood routings in complex areas; (5) establishing virtual-real coupling models of the storm surge and the flood routings in complex areas; (6) carrying out the post processing and the visual output of the three-dimensional dynamic whole-process simulation. The method is mainly applied in the three-dimensional dynamic whole-process simulation of the storm surge and the flood.

The invention discloses a supersonic velocity integrated spray pipe design method and relates to the field of wind tunnel tests. The method includes the following steps of 1, creating a spray pipe model, wherein the model includes a retraction segment, an expansion segment, a testing segment and a boundary layer; 2, figuring out a TG segment curve according to a characteristic line equation of theTG segment curve, figuring out an AD segment curve according to a characteristic line equation of the AD segment curve, and correspondingly obtaining a complete curve of the outer wall of the expansion segment; 3, calculating the displacement thickness of the boundary layer to obtain a boundary layer curve; 4, obtaining a complete curve of the retraction segment; 5, obtaining a complete curve ofthe testing segment. By means of the method, a testing area is enlarged, and the parameters such as a Mach number root-mean-square deviation, an axial Mach number gradient and an airflow-deviation angle of the testing segment are all in line with national military-standard advanced indexes.

The invention discloses an efficient air-condition structure for a ship, which is convenient for entering into a cabin and is time-saving and labor-saving, high in production efficiency, easy in controlling assembling quality and simple in maintenance. The air-condition structure for the ship comprises at least one air-condition system, wherein the air-condition system comprises a compressor (2), an oil-gas separator, a condenser (4), a throttle valve and an evaporator (3); each air-condition system is provided with a frame (5) for supporting; the compressor (2), the condenser (4) and the evaporator (3) are detachably connected with the frame (5) respectively; and when two frames (5) or more frames exist, the adjacent frames (5) are detachably connected.

The invention relates to fluid machine equipment, particularly a centrifugal pump with greatly distorted blades, which comprises impeller blades, a back cover plate, a blade back cover streamline start end, a blade front cover streamline start end and a blade front cover streamline tail end. The invention is characterized in that the impeller blades are controlled by a bezier curve and are in a greatly distorted shape; the distortion curvature of the blade inlet edge curve AB is 90-140 degrees; and the maximum distortion curvature of the blade front cover streamline BC is 110-150 degrees. The invention has the advantage that the bezier curve is utilized to control the blade profile to be in a greatly distorted shape, so that the blade streamline achieves the optimal value conforming to the fluid motion law, thereby avoiding the problems of reflux loss and vibration noise caused by balance holes, reducing the on-way resistance loss, and highlighting the hydraulic performance of the centrifugal pump.

The invention discloses a dense core permeability measuring device and method. The dense core permeability measuring device comprises a core holder, a standard gas mixture supply system, a confining pressure pump, a vacuum pump, a gas chromatograph and a thermostat, wherein an air inlet end of the core holder is connected with the standard gas mixture supply system through a pipeline. The method for measuring the dense core permeability of the dense core permeability measuring device comprises the following steps: S1, placing a rock sample to be measured with a length L into a rock sample cavity, and performing vacuum pumping on the rock sample and gas in the device by using the vacuum pump; and S2, starting the confining pressure pump, increasing the confining pressure of a confining pressure cavity to a required confining pressure value, and keeping the pressure constant. Through adoption of the dense core permeability measuring device and method, the problems of difficulty in measuring flow and no consideration of dispersion and slip in the process of measuring the permeability with the existing steady state method are solved.

The invention relates to fluid machine equipment, particularly a centrifugal pump with greatly distorted blades, which comprises impeller blades, a back cover plate, a blade back cover streamline start end, a blade front cover streamline start end and a blade front cover streamline tail end. The invention is characterized in that the impeller blades are controlled by a bezier curve and are in a greatly distorted shape; the distortion curvature of the blade inlet edge curve AB is 90-140 degrees; and the maximum distortion curvature of the blade front cover streamline BC is 110-150 degrees. The invention has the advantage that the bezier curve is utilized to control the blade profile to be in a greatly distorted shape, so that the blade streamline achieves the optimal value conforming to the fluid motion law, thereby avoiding the problems of reflux loss and vibration noise caused by balance holes, reducing the on-way resistance loss, and highlighting the hydraulic performance of the centrifugal pump.

The invention discloses a blocker-type forging method of a travelling block lifting ring for a petroleum drilling machine lifting system. The method comprises the following steps that a blocker-type forging die is designed according to the shape and size of a forge piece; a blank is heated to the initial forging temperature, and free forging upsetting and rounding are conducted after heat preservation; and the blank is placed in the die to be forged, and after die stripping, cooling in heap and normalizing are conducted to obtain the lifting ring. According to the blocker-type forging method of the travelling block lifting ring for the petroleum drilling machine lifting system, the flowing direction of metal is limited by means of a blocker-type die in a forging process, the shape of a final forge piece is close to that of a part, the machining allowance of the forge piece is small, raw materials are saved, and after forging is completed, a lower die is subjected to automatic die stripping under the dead weight without overturning the blocker-type die and an ejection device, the operation is simple and convenient, the production efficiency is high, and the safety and reliability are achieved; and a metal streamline in the forged piece conforms to the shape of the part, the metal streamline is not cut off in subsequent machining, the mechanical property is excellent, and the userequirement of the travelling block lifting ring can be well met.

The low-noise industrial air-changing fan comprises panel, support, motor box, motor and blade wheel, the blade wheel contains several blades, blade frame and axle sleeve, number of blades is 2-10 blades, every blade is twisted, and arranged in foreraved mode, its blade surface distribution is not symmetrical. The mounting angle alpha on the different primitive-level radius r can be reduced with incrment or r to make blade produce twisted from, the chord b can be increased with increment of r to make blade surface deflect toward outer edge, the front end of blade is a triangle-like flange formed from three circular aras, on its panel a nozzle-shaped collecting device to further reduce noise. Said air-changing fan is high in efficiency, large in flow rate, stable in operation and low in noise, and is applicable to various air-changing fans.

The invention discloses a solar air purification air heater. A motor and four universal wheels are installed at the bottom of the solar air purification air heater. A primary filter is arranged on theinner side of a double-layer pore plate air inlet, and an air valve is installed on the top of a static pressure box. An air heater shell layer, a first air channel and a second air channel are arranged in a concentric circle mode. An electrothermal film heating layer is arranged on the outer side of the left semicircle of the first air channel, a phase change heat storage material is arranged onthe outer side of the right semicircle of the first air channel, and a phase change heat storage material is also distributed on the inner side of the second air channel. Four circulating water pipesare evenly arranged in the phase change heat storage materials on the two portions. The air passes through the pore plate air inlet, a fan and an efficient filter in sequence so that the deep purification of the air can be achieved. The top of the solar air purification air heater is divided by an activated carbon box into two channels which include a primary purification outlet and an efficientpurification outlet, a solar absorption layer covers the outer surface of the whole device, and the intelligent control of the equipment can be achieved by a PLC. The solar air purification air heatercan effectively absorb and store the solar energy, outwards supply the warm air, remove pollutants in the air and be widely applied to indoor heating ventilation and air purification.

The invention provides a low-pressure rotational flow bubble type nozzle. The low-pressure rotational flow bubble type nozzle comprises a flow distribution chamber, a tangential water inlet pipeline,an axial water inlet pipeline, a mixed flow pipe and a gas-liquid mixing cavity; an outlet of the flow distribution chamber is communicated with each the tangential water inlet pipeline and the axialwater inlet pipeline, the outlet of the axial water inlet pipeline is communicated with the mixed flow pipe, and a rotational flow device is arranged in the axial water inlet pipeline and used for generating rotational flow to enter the mixed flow pipe; the outlet of the tangential water inlet pipeline is in tangent connection with the mixed flow pipe and is used for generating tangential flow; the mixed flow pipe is used for converging the rotational flow and the tangential flow; the gas-liquid mixing cavity is communicated with the mixed flow pipe, and the outlet of the gas-liquid mixing cavity is connected with the nozzle. The low-pressure rotational flow bubble type nozzle provided by the invention can generate rotary bubble type water drops, not only increases the cleaning area and enhances the cleaning effect, but also has the massage and striking effect, the blood circulation of the human body is promoted, and the human body has more comfortable skin feeling.

The invention relates to the technical field of material drying, and discloses a material drying device. The material drying device comprises a container used for containing materials, wherein a corebody of a hollow structure is arranged in the container, the core body is provided with a first air inlet used for introducing hot air into the core body, a plurality of first vent holes are formed inthe core body, and a moisture discharging opening is formed in the top end of the container. According to the material drying device, the moisture discharging opening is formed in the top end of thecontainer, hot air drives a large amount of moisture to be exhausted from the top part, the moisture cannot be accumulated at the top part, and repeated evaporation required by water vapor condensation is avoided.