634 results about "Rotational flow" patented technology

An electric work machine with improved workability at high output, configured to cut a work target, is provided. The electric work machine comprises: a working portion configured to cut the work target and a main body including: a housing; a flow path forming portion; a motor; and a control unit, wherein the motor generates rotational power for driving the working portion, the control unit electrically controls rotation of the motor, the flow path forming portion forms an air flow path including a first air flow path and a second air flow path, the first air flow path communicates with an exterior of the housing to allow external air to flow to the motor via the control unit, and the second air flow path communicates with the exterior of the housing so as to allow external air to flow directly to the motor.

The invention belongs to the technical field of wind tunnel simulation, and particularly relates to a multi-physics field coupling environment simulation device, which comprises a base, an upper surface of the base is fixedly connected with a simulation cabin, one side wall of the simulation cabin is provided with a plurality of horizontal flow fans, a plurality of rotating flow fans arranged around the simulation cabin by a circle are mounted on the upper surface of the base, and a top portion of the simulation cabin is provided with a plurality of vertical flow fans. The multi-physics field coupling environment simulation device of the invention is used for simulating complex environments of three-dimensional multi-physics field coupling under different weathers, which improves the diversity of wind tunnel tests.

The utility model relates to the technical field of water treatment, in particular to a multi-phase component multi-stage reinforced mixing device which comprises an outer cylinder, an inner cylinder, a flow guide assembly, a turbulent flow assembly, a mixing and stirring assembly and the like, a first mixing area is formed in the outer cylinder, and feeding is performed in the circumferential tangential direction; a second mixing area provided with a mixing and stirring assembly is formed in the inner cylinder body; the flow guide assembly is located between the first mixing area and the second mixing area; a third mixing area is formed between the outer barrel and the inner barrel, and the turbulent flow assembly is arranged in the third mixing area. The overall structure is compact and simple; sewage is mixed through the rotational flow effect and the centrifugal effect of the first mixing area, meanwhile, components in the sewage are separated and sorted, heavy impurities are centrifugally separated and discharged, and other impurities enter the second mixing area and the third mixing area to be continuously subjected to mechanical mixing, circulating flow mixing and vortex flow mixing reaction; meanwhile, the particle size of the flocculation core is controlled, so that the mixing efficiency is improved, and the utilization rate of the coagulation agent is improved.

The invention relates to the technical field of air flotation oil removal, and discloses a rotational flow air flotation oil removal device and an oil-water separation process. The rotational flow air flotation oil removal device comprises a tank body; the cyclone assembly is arranged in the tank body and comprises a cylinder body fixedly mounted in the tank body; the gas distribution assembly is coaxially arranged at the bottom of the mixing cavity; the gas distribution assembly comprises a gas distribution disc rotationally arranged at the bottom of the mixing cavity, a gas inlet pipe connected with the center of the bottom of the gas distribution disc in a penetrating mode, a plurality of sets of cylindrical gas holes formed in the radial direction of the gas distribution disc in an array mode, a plurality of sets of spiral cover plates covering the gas distribution disc and conical gas holes formed in the spiral cover plates and corresponding to the cylindrical gas holes. According to the rotational flow air flotation oil removal device, the air distribution disc is driven to rotate intermittently, so that the cylindrical air holes correspond to the conical air holes of the spiral cover plate alternately, tiny bubbles and large bubbles matched with oil drops with different particle sizes are generated, and effective capture of tiny oil drops and rapid separation of medium and large oil drops are achieved.

A gas distributor for improving ionization efficiency of a radio frequency ion thruster, comprising a gas supply pipeline, a cavity, a flow guide ball, radial rotational flow holes, axial diffusion holes and a flow guide ball limiter, the gas supply pipeline and the cavity are integrally formed, the radial rotational flow holes and the axial diffusion holes are dispersedly arranged in the cavity, the flow guide ball is filled into the cavity through the gas supply pipeline, the flow guide ball limiter is arranged in the cavity to prevent relative movement of the flow guide ball in the cavity, and the gas distributor composed of the gas supply pipeline, the cavity, the flow guide ball, the radial rotational flow holes, the axial diffusion holes and the flow guide ball limiter is arranged at the bottom of a discharge chamber of the thruster.

The invention discloses a rotational flow anti-blocking device for a pneumatic coal ash conveying pipeline, and particularly relates to the technical field of pneumatic ash conveying, the rotational flow anti-blocking device comprises a conveying pipeline main body mounted on an inlet and an outlet of a pneumatic powder suction pump, and an anti-blocking device is arranged on the inner wall of the conveying pipeline main body and comprises a square pipe; the anti-blocking device is arranged in the conveying pipeline body, the drying mechanism is used for drying wet fly ash to reduce viscosity and reduce caking, the vibration mechanism is matched with airflow of the drying mechanism to achieve pipeline vibration to clean attached fly ash, and the crushing and filtering mechanism crushes and filters residual caking. The protection mechanism blocks the square pipe when crushing is not needed so as to guarantee stability of the mechanism, the multiple mechanisms act synergistically, the blocking problem in the wet coal ash conveying process is effectively avoided, the conveying efficiency and the system stability are remarkably improved, the equipment shutdown and maintenance cost is reduced, and the service life of the device is prolonged.

The invention discloses an oil reservoir exploitation multiphase flow separation device with cyclone pre-separation, which comprises a cyclone separator body, a cyclone separation assembly, a purification and deposition prevention assembly and a gas export and purification assembly, and is characterized in that the cyclone separation assembly is mounted in the cyclone separator body; according to the device, primary screening and flow equalizing are carried out on high-sand-content multi-phase fluid through a honeycomb damping grid at the front end of a micro rotational flow channel by utilizing a regular pore channel structure of the honeycomb damping grid, large-particle solid impurities are effectively intercepted, and the high-sand-content multi-phase fluid is purified; after the fluid passes through the honeycomb damping grid, the fluid enters the conical opening of the micro rotational flow channel, the flow speed is increased under the acceleration action of the contraction section, a high-strength rotational flow field is generated along a flow guide path formed by the micro spiral grooves, and the fluid is prevented from directly entering the micro rotational flow channel to cause local blockage or abrasion; and primary separation of oil, gas, water and solid impurities is realized under the action of centrifugal force.

The invention relates to a centrifugal compressor PIV speed measurement and analysis method, device and equipment and a medium. The method comprises the following steps: acquiring flow field optical measurement data of the centrifugal compressor through a particle image velocity measurement technology; inputting optical measurement data of the flow field into a deep learning model, and extracting dynamic characteristics of the flow field through a characteristic extraction layer of the deep learning model; reconstructing the dynamic characteristics of the flow field into a three-dimensional flow field velocity vector field by using a velocity vector reconstruction layer in the deep learning model; and generating a velocity measurement analysis result based on the three-dimensional flow field velocity vector field. By adopting the method, the multi-scale dynamic characteristics in the complex three-dimensional rotating flow field of the centrifugal compressor can be effectively captured, high-precision three-dimensional velocity vector reconstruction is realized, and the spatial resolution and robustness of flow field measurement are improved.

The invention discloses a wafer cleaning device based on ultrasonic cleaning, and relates to the technical field of wafer cleaning devices. Comprising a cleaning machine outer tank body, a wafer cleaning glass tank, an ultrasonic cleaning tank, an ultrasonic device, a bottom plate, a housing, a cleaning tank rail, a flow dividing water supply device and a bubble removing uniform vibration device, ultrapure water serves as a medium, ultrasonic vibration is effectively conducted to the wafer cleaning glass tank, a strong acid solution in the tank is driven to uniformly vibrate, and efficient cleaning of wafers is achieved. High turbulence pulsation and local shearing stress are formed at the junction of oblique water replenishing and the stock solution, large bubbles are sheared into small bubbles, bubble gathering is prevented, and the liquid purity and the ultrasonic cleaning efficiency are improved. Under the centrifugal separation action of the rotational flow connecting base and the annular rotational flow piece, bubbles in water flow are concentrated in the center position, ultrapure water on the outer side is rapidly discharged, the bubbles are efficiently absorbed after making contact with the hydrophobic porous membrane, and the bubble removing effect is remarkably improved.

An oil baffle assembly, a rotor assembly and a compressor. The oil baffle assembly comprises: a first-stage oil baffle (1), wherein a flange (11), a first counterweight (12) and a plurality of support columns (13) are provided on the side of the first-stage oil baffle (1) that faces a rotor core (3), the flange (11) is configured to accommodate an end portion of a crankshaft (7), mounting holes (14) are provided in the first counterweight (12) and the support columns (13), and a connecting member (8) connects the first-stage oil baffle (1) to the rotor core (3) by means of the mounting holes (14); and a second-stage oil baffle (2) which is arranged on the side of the first-stage oil baffle (1) that faces away from the rotor core (3). The oil baffle assembly enlarges the coverage space of a rotational flow field in radial and axial directions, and can enable frozen oil dissolved in gas to be separated out in a large proportion and flow back into a compressor oil pool, thereby improving an oil-gas separation effect of an oil-gas separation baffle.

The invention discloses a two-stage rotational flow hydrogen fuel nozzle and a combustion chamber thereof. The nozzle comprises a main hydrogen flow path, an auxiliary hydrogen flow path and an air flow path; the hydrogen main flow path is provided with a plurality of main spray holes which are distributed in a circumferential array; the air flow path is provided with a two-stage cyclone; the hydrogen auxiliary flow path comprises a hollow annular flow divider, the flow divider is coaxially arranged around the periphery of the hydrogen main flow path, and a plurality of injection holes are formed in the inner wall and the outer wall of the flow divider and communicated with the first-stage rotational flow channel and the second-stage rotational flow channel respectively. In the using process, efficient mixing of fuel and air is achieved through the synergistic effect of graded injection of main and auxiliary hydrogen and two-stage rotational flow air. According to the combustion chamber provided with the nozzle, large-scale flames are decomposed into a plurality of small flames through micro-scale injection, two-stage rotational flow is combined for strengthening mixing, the backfire risk is effectively restrained, the combustion temperature is lowered, NOx emission is remarkably reduced, meanwhile, the combustion stability is improved, and a reliable solution is provided for hydrogen fuel combustion of an aero-engine.

The invention relates to the technical field of waste gas purification devices, and provides a packaging bag printing organic waste gas rotational flow purification system which comprises a gas inlet pipe, one end of the gas inlet pipe is fixedly connected with a rotational flow separation cylinder, the bottom of the rotational flow separation cylinder is fixedly connected with a dust discharge pipe, and the outer wall of the rotational flow separation cylinder is fixedly connected with a base. A flow guide plate is fixedly connected to the inner wall of the cyclone separation barrel, and a filtering separation mechanism is installed in the cyclone separation barrel. Waste gas is tangentially conveyed into the cyclone separation barrel, under the action of a plurality of flow guide plates arranged on the inner wall of the cyclone separation barrel, the waste gas can generate cyclone during conveying, large impurity particles in the waste gas are driven to be thrown to the inner wall of the cyclone separation barrel under the action of centrifugal force, the waste gas impacts an impeller, and the impeller is driven to rotate. An impeller rotates to drive a first rotating rod to rotate, and a filter plate fixedly connected with the outer wall of a second rotating rod rotates, so that the effect of separating and purifying particles in the waste gas is further improved.

The invention discloses a gas-liquid atomization rotational flow mixing reaction device which comprises a mounting bracket, the mixing reaction chamber is detachably mounted on the mounting bracket through a bolt; the communicating chamber is detachably mounted at the top of the mixing reaction chamber through a bolt; the gas-liquid separation chamber is detachably mounted at the top of the communicating chamber through a bolt; the atomizing nozzle is fixedly connected to the mixing reaction chamber; the driving unit and the indicating unit are installed on the pressure regulating unit, and one end of the gas feeding pipe is fixedly connected to the atomizing nozzle. By adopting a gas-liquid atomization and rotational flow self-stirring structure, the problems that traditional mechanical stirring is slow in mixing, poor in uniformity and unbalanced in local proportion are fundamentally solved, the phenomena of back mixing and short circuit are eliminated, the reaction is more sufficient, crystallization is more uniform, the yield is higher, meanwhile, a stirring mechanism is omitted, the device is simplified, energy consumption is reduced, parameters such as pH and temperature are fed back more timely, and the production efficiency is improved. And the control precision is greatly improved.

The invention discloses a porous medium sweating and cooling combustion chamber based on a ceramic matrix composite material, and relates to the technical fields of gas turbines, new energy and the like. In order to solve the problem of combustion instability such as combustion oscillation of a traditional gas turbine combustion chamber, a ceramic-based porous medium combustion chamber structure is adopted, liquid fuel infiltrates from the outer wall face of a porous medium and is evaporated and gasified on the inner wall, and then combustion occurs. The gasification reaction of the liquid fuel in the porous medium and on the wall surface can take away a large amount of heat, so that the effects of heat insulation, heat protection and wall surface cooling are achieved, and the combustion chamber can be protected from thermal damage. On the other hand, traditional jet flow or rotational flow combustion is replaced by wall face evaporation combustion, and combustion oscillation caused by uneven mixing or jet flow is avoided.

The invention provides a supersonic rotational flow atomization dust removal spray head device and a spray pipe optimization simulation analysis method, and relates to the technical field of supersonic rotational flow atomization spray heads, the device comprises an air inlet pipe, a liquid inlet, a shell, a Laval spray pipe, an outer rotational flow pipeline and an atomization spray nozzle, the Laval spray pipe is arranged in the outer rotational flow pipeline, and the atomization spray nozzle is arranged in the shell; a wave elimination section of the Laval nozzle is connected with the atomizing nozzle, a spirally distributed liquid film circular seam is formed in the side wall of a mixing chamber at the lower end of a throat part of the Laval nozzle, and a spiral flow deflector is arranged at an outlet of the atomizing nozzle. Efficient dynamic interaction with rotating liquid supplied by the outer ring spiral channel occurs at the outlet of the nozzle, efficient fog drop crushing and uniform spraying are achieved through airflow acceleration and kinetic energy conversion, and it is guaranteed that the particle size of fog drops meets the requirements of capturing coal dust, improving the atomization efficiency, strengthening the wind resistance and reducing water consumption; better fogdrop particle size matching is realized; and the blocking risk is reduced.

The invention relates to a cyclone separator capable of preventing particles on the outer wall of a riser from adhering and coking, and the cyclone separator capable of preventing particles on the outer wall of the riser from adhering and coking comprises an exhaust pipe, a rotational flow structure, and a cyclone pipe, a cylinder body, a cone and a discharging structure which are sequentially communicated from top to bottom, the exhaust pipe is arranged above the cyclone pipe and partially extends to the cyclone pipe, an air inlet and an air outlet are formed in the ends, located inside and outside the cyclone pipe, of the exhaust pipe respectively, and the rotational flow structure is located in the cyclone pipe and surrounds the exhaust pipe; the arrangement position of the feeding port is higher than that of the rotational flow structure, and the large end of the cone is connected to the barrel. According to the cyclone separator capable of resisting particle adhesion and coking on the outer wall of the riser, the problem of coking outside the riser can be solved, and the separation efficiency can be ensured.

The invention discloses a burner nozzle structure capable of improving the fuel distribution characteristic. A bluff body swirl vane comprises a plurality of swirl single pieces, a swirl channel is formed between every two adjacent swirl single pieces, the swirl single pieces form an incident flow face on the incident flow side, and when fluid impacts the incident flow face, streaming is formed, wide wake flow is generated, and the phenomenon that the fluid falls off along with vortexes is achieved; and the fuel supply system comprises a fuel cavity and a fuel pipe, one end of the fuel cavity is connected with the fuel pipe, the fuel pipe is arranged along the central axis of the combustor shell, and the fuel cavity is provided with a fuel spray hole communicated into the rotational flow channel. The design of the trapezoidal cross section and the incident flow surface of each rotational flow single piece is utilized to enable fluid to form streaming, wake flow and vortex shedding, turbulent mixing and high-temperature flue gas backflow are enhanced, meanwhile, accurate fuel distribution is achieved through the fuel cavities, the fuel pipes and the fuel spray holes in one-to-one correspondence with the rotational flow channels, combustion-supporting air distribution is further optimized through the multi-stage radial flow dividing rings in the rotational flow channels, and the combustion-supporting effect is improved. And the mixing uniformity of the fuel and the combustion-supporting air is effectively improved.

The invention belongs to the technical field of sludge treatment, and particularly discloses water conservancy construction sludge treatment equipment which comprises a filter cartridge rotationally arranged through a first driving part; the first auger blade is rotationally arranged in the filter cartridge through an auger shaft; the auger shaft is rotationally arranged through a second driving part; one end of the filter cartridge is provided with a feed port, and the other end of the filter cartridge is provided with a discharge port for discharging sludge after water extrusion. Compared with the mode that in the background technology, simple conveying is achieved only through a feeding auger, and extrusion cannot be achieved, extrusion is generated through relative movement of the filter cartridge and the first auger blade, the water separation amount is remarkably increased, and the preliminary dewatering effect is improved; in addition, the filter cartridge forms rotational flow to generate centrifugal force, so that the filtration of water is further improved, and the dewatering effect of the sludge is ensured.

The invention discloses a rotational flow microbubble oscillation generator, system and method, relates to the technical field of microbubbles, and aims to strengthen gas-liquid mixing and mass transfer effects, so that the energy utilization efficiency is improved, and microbubbles with more uniform sizes are generated. The rotational flow microbubble oscillation generator comprises a rotational flow mixing component and a fluid oscillation component, and a feedback channel, and a flow inlet channel, an oscillation cavity, a vortex cavity and a bubble outlet which are communicated in sequence are arranged in the fluid oscillation component. Through the rotational flow mixing part, gas and liquid can be effectively mixed to form high-speed micro bubble jet flow, kinetic energy contained in the jet flow is utilized to cause sweeping motion in the fluid oscillation part, oscillation flow, feedback flow and vortex are formed, turbulent pulsation and collision are generated under the combined action of the oscillation flow, the feedback flow and the vortex, turbulent vortex shear breaking and jet flow shear breaking are caused, and the jet flow is formed. Therefore, the micro bubbles are subjected to secondary crushing, and micro bubbles with uniform size distribution and small average diameter are generated.

The invention discloses a power station air cooling island dry ice auxiliary cooling cleaning system and method, and belongs to the technical field of power station air cooling island cooling. The device is composed of a bimodal gas-solid two-phase flow nozzle, a flow field optimization nozzle support, a working medium supply unit and an intelligent control system. A dual-mode gas-solid two-phase flow nozzle is integrated on the flow field optimization nozzle support, an adjustable rotational flow generator is arranged in the nozzle, dry ice particles can be injected into the inner space of the air cooling unit, the environment temperature is reduced by means of the characteristic that dry ice sublimates to absorb heat, or the dry ice is directly injected to the outer surface of a heat dissipation pipe bundle to achieve efficient cleaning. The intelligent control system automatically switches a cooling mode and a cleaning mode and dynamically adjusts the rotational flow strength, the injection pressure and the dry ice particle size of the nozzle. The heat dissipating capacity of the air cooling island can be enhanced, and the heat dissipating tube bundle can be cleaned in a lossless mode.

The invention discloses refrigerant filling equipment for a horizontal rotational flow evaporator, which belongs to the technical field of refrigerant filling and comprises an injection mechanism for injecting an external refrigerant into the evaporator. The injection mechanism is provided with a pumping mechanism used for pumping out original redundant refrigerants in the evaporator and a connecting mechanism used for connecting the injection mechanism with the refrigerant injection opening. The pumping and injecting functions of the refrigerant are integrated in single gun body equipment, and the whole process can be controlled by switching the gear of the knob, so that the operation steps are greatly simplified, and the repair and maintenance efficiency is remarkably improved; a mechanical connecting mechanism based on gear transmission and a worm and gear self-locking effect is adopted, after the four fixing pieces are inserted into an injection opening, the four fixing pieces are indirectly driven to execute synchronous and symmetrical radial movement through rotation of the rotary knob, and therefore the four fixing pieces are firmly clamped on the outer wall of an evaporator refrigerant injection pipe; and stable and reliable connection between the filling equipment and the evaporator is ensured.

The invention relates to the technical field of ammunition destruction flue gas treatment, in particular to a flue gas purification device for ammunition destruction and a use method thereof, and the flue gas purification device comprises a quench tower, a rotational flow spray chamber, a dry adsorption bin, a catalytic decomposition reactor and a discharge monitoring terminal; according to the device, rapid cooling, acid gas neutralization, organic matter and heavy metal adsorption and NOx catalytic reduction are achieved for high-temperature and high-toxicity flue gas generated by ammunition pyrolysis through a multi-stage collaborative purification process, PLC intelligent control and online monitoring are integrated, and three operation modes of conventional operation, emergency operation and regeneration are supported; the system can effectively improve the purification efficiency, realizes independent maintenance of the module, dynamically responds to the destroying working condition change, and ensures that the emission reaches the standard.

The utility model provides a centrifugal hydraulically-driven self-cleaning filter and belongs to the technical field of filtering equipment. The upper end and the lower end of the cylinder body are fixedly connected with the upper sealing head and the lower sealing head through flanges and screws respectively; a centrifugal cylinder body is also arranged in the lower sealing head, and the centrifugal cylinder body is a conical cylinder body; a rotational flow eliminating plate is arranged at the bottom of the centrifugal barrel, a plurality of holes are evenly formed in the rotational flow eliminating plate, a wear-resisting bottom is arranged in the lower sealing head and located below the rotational flow eliminating plate, and in the water inlet process of equipment, particulate matter and heavy gravel are prevented from impacting the equipment along the holes, and corrosion of chemical components in water is prevented. According to the utility model, the impeller is driven to rotate by ingeniously utilizing the hydraulic power for flushing the pipeline, and then the cleaning brush fixed on the rotating shaft is driven to perform automatic cleaning. And the self-cleaning function of the filter can be realized without additional power equipment.

The invention relates to the technical field of petroleum and natural gas exploration and development, in particular to a pulse rotational flow well cementation oscillator and a using method thereof. The pulse rotational flow well cementation oscillator comprises a shell, the bottom of the shell is rotationally connected with a guide shoe cap, an installation disc is arranged in the shell, the top of the installation disc is provided with a piston cylinder, the upper end of the piston cylinder is open, the piston cylinder and the shell form an annulus, the installation disc is provided with an inclined rotational flow hole communicated with the annulus, and an upper side hole communicated with the annulus is formed in the upper portion of the side wall of the piston cylinder. The bottom of the rotating shaft rotatably penetrates through the piston cylinder and the mounting disc, an upper turntable hydraulically driven to rotate is arranged at the top of the rotating shaft, a first inclined hole communicated with the piston cylinder and a second inclined hole communicated with the annulus are formed in the upper turntable, the rotating shaft is connected with the piston through a cam mechanism, and when the rotating shaft rotates, the piston vertically ascends and descends along the piston cylinder to block or unblock the upper side hole. Through the combination of pulse agitation and rotational flow, the uniform distribution degree of well cementation liquid and the well cementation quality are greatly improved, the eccentric guide shoe cap is rotationally connected with the shell, and the tripping-in efficiency of a well cementation pipe string can be improved.

The invention relates to the technical field of centrifugal dust removal, and discloses a self-adaptive adjustment dust suction device for fan blades and a dust removal method thereof.The self-adaptive adjustment dust suction device comprises a bearing plate and a positioning plate arranged on the bearing plate, and further comprises a sliding piece arranged on the bearing plate in a sliding mode; the swing angle piece is fixed on the sliding piece; the dust collection support is fixed on the swing angle piece; the dust collection box is fixed in the dust collection support; the air exhaust branch pipe is fixed at one end, close to the swing angle piece, of the dust collection box; the exhaust main pipe is fixed above the exhaust branch pipe; the dust collection openings are formed in the upper side and the lower side of the dust collection box; the high-pressure air taps are fixed at the two ends of the dust collection box; the rotational flow air cap is driven by compressed air to rotate, the rotational flow air cap and the sweeping air nozzle form a self-adaptive rotating airflow generation structure, high-speed airflow is sprayed out through the sweeping air nozzle and then overlaid to form a stable rotating airflow field, and efficient stripping and powerful removal of dust on the surface of equipment are achieved by means of strong airflow impact force.

The invention relates to a method and device for designing a spatial streamline inlet of a rotational flow separator, and the method comprises the steps: determining an inlet angle alpha, a wrap angle beta, an incident angle gamma and an overturning angle theta of the inlet of the rotational flow separator according to the performance requirements of the rotational flow separator; the method comprises the following steps: selecting a control point at a rotational flow separator, generating a basic shape of a characteristic bus of the spatial streamline inlet through a spline curve equation, then selecting a type value point to carry out iterative optimization on the bus shape, and determining a final curve shape of the spatial streamline inlet through an entrance angle, a wrap angle, an incident angle and a flip angle; based on the inlet shape of the rotating flow separator, the section shape of a space streamline inlet is designed through a Bezier curve equation; and according to the final curve shape and the section shape of the spatial streamline inlet, the spatial streamline inlet structure of the rotating flow separator is determined. Compared with the prior art, pre-separation of particles / liquid drops is achieved through fluid inertia accelerated rotation, and the separation efficiency of the hydrocyclone is improved.

The invention relates to the technical field of wastewater treatment, and provides a rotational flow oil removal treatment device and method.The rotational flow oil removal treatment device comprises a rotational flow tank, a top cover, supporting legs, a blow-off pipe, a bearing pedestal, a center rod, rotational flow fan blades, a first driving assembly and a second driving assembly; the bearing seat is arranged at the bottom of the rotational flow tank, the first rod is hollow, one end of the first rod penetrates through the bearing seat, the other end of the first rod is located in the rotational flow tank, and the first driving assembly is connected with the first rod and used for driving the first rod to rotate; the rotational flow fan blade is arranged on the first rod and is positioned in the rotational flow tank; the second rod is movably arranged on the first rod, and the second driving assembly is connected with the second rod and used for driving the second rod to move linearly. The device has the effect of conveniently adjusting the position of the oil discharge outlet.

The invention relates to the technical field of vehicles, and particularly discloses a methanol engine, a vehicle and a control method of the methanol engine, the methanol engine comprises a plurality of gas inlet assemblies, each gas inlet assembly comprises a gas inlet channel, a gas inlet valve, a methanol ejector and a gas blowing pipeline, and each gas inlet channel comprises a first gas channel and a second gas channel which are communicated at an included angle; the methanol ejector is arranged in the first air channel, the air inlet valve is used for opening or closing the output end of the second air channel, the second air channel comprises a first space located on the side, facing the first air channel, of the air inlet valve and a second space located on the side, back to the first air channel, of the air inlet valve, and the air blowing pipeline communicates with the second space and is used for blowing air into the second space. And the air can form a rotational flow surrounding the air inlet valve in the second air passage, so that methanol in the second air passage is promoted to flow around the air inlet valve, methanol in the first space and the second space tends to be uniformly distributed, and the homogenization degree of mixed gas of methanol and air after entering the air cylinder is ensured.

A special valve device (500) for an infusion device (100), the special valve device (500) comprising: a special valve body (501) comprising a rotatable special valve (550) in an inner cavity of the special valve body (501), at least one inlet port (504) and at least one outlet port (505), wherein a flow control section (552) of the rotatable special valve (550) has a through-bore communicating with the at least one inlet port (504) and the at least one outlet port (505), wherein the valve port (509) has a valve retaining means (509a) therein; and the rotatable flow control section (552) with a through-bore for a medial flow path (560) therein, wherein the rotatable flow control section (552) has an outer surface (552a), wherein the through-bore for the medial flow path (560) has a first opening (561) to the outer surface (552a) and a second opening (562) to the outer surface (552a), wherein the outer surface (552a) of the rotatable flow control section (552) has a valve fastening means (509b) thereon, which is arranged to secure the rotatable flow control section (552) to the valve fastening means (509a) by means of a snap / latch connection, wherein the outer surface (552a) has a first conical groove (561a) communicating with the first opening (561) and a second conical groove (562a) communicating with the second opening (562), wherein the first and second grooves (561a, 562a) are arranged such that, when the rotatable flow control section (552) is rotated, they communicate with the at least one inlet opening (504) and the at least one outlet opening (505), wherein each of the first conical groove (561a) and the second conical groove (562a) has a groove tip (561c, 562c) and a groove end (561b, 562b) defining a curved groove bottom (561d, 562d), wherein the groove end (561b, 562b) has a substantially conical (tapered) groove opening (561e, 562e) which opens into an inner surface (560a) of the medial flow path (560), wherein the curved groove bottom (561d, 562d) of the groove end (561b, 562b) extends in a direction towards the respective opposite opening (562,561) is curved, wherein the rotatable flow control section (552) is arranged so that it can be rotated to close off fluid flow through the special valve body (501) or to adjustably regulate fluid flow through the special valve body (501) via the medial flow path (560).

The invention relates to the technical field of combustor test, and discloses a test platform for an asphalt mixture equipment combustor, the test platform comprises a base, a test platform hearth, a hybrid demisting tower and a first induced draft fan, the upper end of the base is provided with a combustor, and the output end of the combustor is connected with the test platform hearth; the air outlet end of the test platform hearth is connected with the hybrid demisting tower and the detection pipeline, the air outlet end of the hybrid demisting tower is connected with the first induced draft fan, the hybrid demisting tower comprises a tower frame, a spraying mechanism and a first water pump, the tower frame is provided with a water tank, the upper end of the tower frame is provided with a demisting cavity, the side wall of the water tank is provided with an air inlet, and the upper end of the demisting cavity is provided with an air outlet; a communicating pipe is arranged between the water tank and the demisting cavity, a rotational flow plate is arranged in the communicating pipe, the first water pump is installed on the side wall of the water tank, the spraying mechanism is arranged in the demisting cavity, and the first water pump is connected with the spraying mechanism. According to the invention, generated waste gas is subjected to four-stage treatment of rotational flow, spraying, filtering and centrifugal demisting, and is discharged after reaching the standard through a tail end fan.