1232 results about "Rotational flow" patented technology

An apparatus includes a housing, a fluid reservoir, a flow control mechanism, and an actuator. The housing defines an inner volume and has an inlet port that can be fluidically coupled to a patient and an outlet port. The fluid reservoir is disposed in the inner volume to receive and isolate a first volume of a bodily-fluid. The flow control mechanism is rotatable in the housing from a first configuration, in which a first lumen places the inlet port is in fluid communication with the fluid reservoir, and a second configuration, in which a second lumen places the inlet port in fluid communication with the outlet port. The actuator is configured to create a negative pressure in the fluid reservoir and is configured to rotate the flow control mechanism from the first configuration to the second configuration after the first volume of bodily-fluid is received in the fluid reservoir.

The invention discloses a rotational flow micro-mixing nozzle with built-in plasma combustion supporting and a micro-mixing combustor. The rotational flow micro-mixing nozzle comprises a tangential rotational flow part, a fuel pipe and a mixing pipe which are coaxially arranged, and plasma combustion supporting exciters arranged on the fuel pipe and the mixing pipe. The plasma combustion-supporting exciter is integrated in the nozzle, the structural design of the micro-mixing combustor can be simplified, and the size and complexity of the micro-mixing combustor are reduced; the plasma combustion-supporting exciter is installed at the top of the mixed gas channel of the rotational flow micro-mixing nozzle, stable adjustment of the combustion process under the variable working conditions can be achieved by controlling opening and closing and the discharge intensity of the plasma combustion-supporting exciter when the load changes, and meanwhile the response speed under the different working conditions is increased; air or an oxidizing agent can be fully mixed with fuel at a specific rotational flow degree through rotational flow air flow generated by the tangential rotational flow component, the combustion range can be widened, and the stable combustion effect under the extreme working condition is enhanced.

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 discloses a three-foot portable multi-angle underwater adsorption anchoring drilling device. The drilling machine feeding component is installed on the drilling machine main body platform in a vertically movable mode, the three-foot supporting component is composed of a main foot and an auxiliary foot, the main foot and the auxiliary foot are installed on the drilling machine main body platform in an angle-adjustable mode, the main foot and the auxiliary foot are each provided with a micro-needle rotational flow suction cup, and after the micro-needle rotational flow suction cups suck the wall face of a to-be-drilled structure, the micro-needle rotational flow suction cups suck the wall face of the to-be-drilled structure. The drilling machine feeding component drills a to-be-drilled structure, the drilling machine feeding component achieves feeding and resetting of the drilling machine through positive and negative rotation of the motor so as to adjust the drilling operation depth, and the three-foot supporting component can change the feeding angle of a drill bit so as to meet the operation requirements of different drilling angles. The multi-angle drilling device can achieve multi-angle drilling operation in the repairing process of surface cracks of dams with different curvatures, meanwhile has the operation capacity in the complex water flow environment, can replace manual operation and improve the operation efficiency, and is easy to carry and store, wide in application range, safe and reliable.

The invention relates to the technical field of transformers, in particular to an anti-interference phase-shifting rectification dry-type high-capacity transformer which comprises a cooling channel, an air inlet system, an air outlet system and a compression system. The cooling channel is arranged between the high-voltage coil and the low-voltage coil; the air inlet system is connected with the mounting frame, and when the air inlet system works, low-temperature gas outside the anti-interference shell is sucked in, forms rotational flow and is fed into the cooling channel; the air outlet system is connected with the top of the anti-interference shell, and the compression system is connected with the air outlet system; low-temperature air is extracted from the outside and fed into the space between the high-voltage coil and the low-voltage coil in a rotational flow mode, dead-corner-free heat dissipation is guaranteed, the heat dissipation efficiency can be improved by changing the included angle between the low-temperature air and the horizontal plane during rotational flow along with heat change, heat is recycled for refrigeration, and the heat dissipation efficiency is further improved; the problem that due to heat accumulation in the anti-interference shell, air blown into the position between the high-voltage coil and the low-voltage coil by the draught fan is hot air and is not evenly distributed is solved.

The invention relates to the technical field of immersed injection spray guns, and discloses a multi-channel rotational flow spray gun optimization method and system based on graph convolution, and the method comprises the steps: combining computational fluid dynamics and a graph convolution neural network technology, and rapidly predicting a velocity field and a pressure field of a spray gun through rotational flow spray gun grid coordinates and rotational flow blade boundary information; the design period is obviously shortened, the test cost is reduced, and the research and development efficiency is improved; the graph convolutional neural network model subjected to repeated training and verification has high generalization ability and high accuracy, and it is guaranteed that the spray gun can still provide reliable prediction results under different working conditions and variable industrial conditions. The system comprises a data acquisition and preprocessing module, a graph convolutional neural network model module and a rotational flow spray gun structure optimization module. The flow characteristics and local physical characteristics of the spray gun are further analyzed, efficient and stable performance can be kept in actual working conditions, the service life is prolonged, and the metallurgical reaction efficiency is improved.

The invention discloses energy-saving high-pressure cleaning equipment for square and rectangular pipes, and relates to the technical field of high-pressure cleaning, the energy-saving high-pressure cleaning equipment comprises a main body frame, a cleaning module is mounted above the main body frame, a rotational flow collaborative cleaning mechanism is arranged in the cleaning module, and the rotational flow collaborative cleaning mechanism is used for changing a water flow mode to ensure internal and external water flow collaborative high-pressure cleaning; the introduced air conveying bin only surrounds the outmost periphery of the nozzle, air flow flows along spiral water flow on the outmost periphery of the nozzle after being discharged in a vertical flowing mode, through the design, the peripheral water flow obtains additional momentum under the action of wind power, and then the momentum is transmitted to the internal water flow through collision among fluid molecules; according to the process, redistribution of energy is achieved, energy of internal water flow is supplemented, and water flow impact force borne by the peripheral square and rectangular pipes and the internal square and rectangular pipes is more balanced through the effect of wind power on the peripheral water flow and transmission of the energy to the internal water flow.

The invention discloses a turbulent burner for mixed combustion of ammonia and coal. The turbulent burner comprises a first cylinder, a second cylinder and a third cylinder, a pulverized coal airflow channel is formed in an inner cavity of the first cylinder; an ammonia gas channel is formed between the first cylinder and the second cylinder; a secondary air channel is formed between the second cylinder and the third cylinder; an inner cavity of the first cylinder is divided into four sections from front to back, namely a first steady flow section, a divergent section, a second steady flow section and a tapered section in sequence, the first steady flow section and the second steady flow section are cylindrical, the divergent section and the tapered section are circular truncated cone-shaped, and the diameter of the front end of the divergent section is large; the front end of the reducing section is small in diameter; a bluff body with a cylindrical front end and a circular truncated cone rear end is arranged in the first cylinder, one part of the bluff body rear end is located inside and outside the divergent section, and the other part is located in the first steady flow section; rotational flow blades are connected between the inner wall of the first cylinder and the outer wall of the blunt body; a plurality of guide plates are evenly distributed at the front end of the second cylinder in the circumferential direction. The method is suitable for the working condition with the small ammonia mixing proportion, and the transition effect of the coal-fired boiler from pure coal combustion to high-proportion ammonia-doped combustion is mainly achieved.

The invention relates to the field of multiphase numerical simulation, and discloses a numerical simulation method for solid and liquid phases in a rotating flow channel based on multiple reference systems, which comprises the following steps of: firstly, acquiring a rotating flow field generated by a multiple reference system method, and extracting rotating domain information as well as particle information and fluid computational domain grid information in a current time step; secondly, particles in a rotation domain and particles outside the rotation domain are determined according to the rotation domain information and the particle information; in combination with the particle information and the fluid calculation domain grid information, the final flow field speed and the reconstructed porosity of the particles in the rotation domain and the particles outside the rotation domain are calculated respectively, and then the drag force is calculated according to the final flow field speed, the reconstructed porosity and the particle information; meanwhile, according to the particle information and the rotation domain information, the Korotkoff force and the centrifugal force of the particles in the rotation domain are calculated. Finally, drag force, Korotkoff force and centrifugal force are calculated through iteration, particle information and grid information of the next time step are obtained, and therefore numerical simulation calculation of particle motion in the rotating flow channel under the fixed grid is achieved.

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 invention belongs to the technical field of hydraulic engineering, and provides a vertical shaft rotational flow spillway tunnel shape optimization method which comprises the following steps: S1, determining a plurality of shape optimization parameters and a plurality of optimization indexes of a vertical shaft rotational flow spillway tunnel; s2, obtaining the value range of each body type optimization parameter and carrying out random sampling to form a plurality of groups of body type optimization parameter samples; s3, modeling the vertical shaft rotational flow spillway tunnel according to the multiple groups of body type optimization parameter samples, and performing numerical simulation on the obtained vertical shaft rotational flow spillway tunnel model to obtain optimization index values corresponding to the various groups of body type optimization parameter samples; s4, constructing a Kriging agent model according to all the body type optimization parameter samples and the optimization index values; s5, establishing a multi-objective optimization model according to the Kriging agent model, and solving to obtain an optimal solution of the body type optimization parameters; and S6, constructing the vertical shaft rotational flow spillway tunnel according to the optimal solution of the body type optimization parameters. The optimization method does not need multiple times of numerical simulation, and the optimization efficiency is improved.

A turbine moving blade with an internal cooling channel with a dustproof structure comprises a rotational flow cavity arranged between ribbed U-shaped cooling channels in the moving blade, the rotational flow cavity is connected with the cooling channels with inclined ribs through square nozzles, and the top of the rotational flow cavity shrinks and is connected with a blade top dust removal hole through a hollow turbulent flow column of a channel elbow. Under the rotating condition, particulate pollutants in the channel are gathered on the pressure face side of the channel and then enter the rotational flow cavity from the square nozzle under induction of the inclined ribs. Tangently-incident cold air forms rotational flow in the rotational flow cavity, particles are difficult to deposit in the rotational flow cavity due to the high tangential speed, and the particles can only enter the hollow channels of the turbulent flow columns along with the cold air and finally flow out of the blades through the blade top dust removal holes. Under limited cold air consumption, particles are separated from cold air and discharged out of the blades through rotation, the guiding effect of the turbulent flow ribs and inertia of the particles, and the heat transfer uniformity of the blades is optimized through rotational flow cooling.

The invention provides a water-ice separation device for cathode tail exhaust for a fuel cell, which comprises a device body, the device body is provided with an inner cavity, the inner cavity is provided with a cathode tail exhaust mixed gas inlet and a mixed gas outlet at two opposite sides of the device body respectively, and the inner cavity is provided with a water / ice outlet at the bottom of the device body; the inner cavity is provided with a spiral separation rotating rod which extends from the cathode tail gas mixed gas inlet to the mixed gas outlet, and the spiral separation rotating rod is provided with a spiral separation blocking piece. Water and / or ice in the cathode tail gas are / is better separated by arranging multi-stage rotational flow, the water and / or ice in the cathode tail gas under the gravity action and the centrifugal action are / is collected and separated by arranging a scattering control filter screen and a flow accumulation filter screen, only gas enters the expansion machine, blades of a rotational flow turbine of the expansion machine are not impacted by the water and / or the ice, and the water and / or the ice in the cathode tail gas are / is separated. The efficiency of the expander is increased and power consumption is reduced.

The comprehensive cleaning equipment for the oil filter comprises a cleaning pool, a plurality of cleaning bins capable of allowing the filter to be placed therein are arranged in the cleaning pool in a matrix mode, and a dynamic cleaning mechanism is arranged in each cleaning bin. The dynamic cleaning mechanism comprises a rotary supporting assembly used for containing the filter and a flushing assembly used for cleaning the filter, in the working state, the rotary supporting assembly is matched with the flushing assembly to drive the filter to rotate, and the flushing assembly is provided with a water spraying channel arranged in the tangential direction of the surface of the filter. High-pressure water flow is guided to act on the surface of the filter in the tangential direction through the water spraying channel, cleaning liquid in the cleaning bin is promoted to form a rotational flow state, the filter rotates on the rotary supporting assembly, comprehensive cleaning is guaranteed, and deep dirt is removed through centrifugal force.

The invention discloses a stainless steel material gear machining system, and relates to the technical field of gear machining. Accurate positioning and feeding of a gear blank are achieved through the rotary positioning pin and the feeding electric cylinder; the cutting wheel rotates at a high speed to complete tooth root cutting, and high-pressure airflow immediately cleans scrap iron on a cutting edge; the closed protective cover is matched with the scrap blocking cover and the scrap guiding pipe to guide scrap iron to the cooling liquid pool in a centralized mode. And internal air pressure is released to drive the air wheel and the rotary impeller disc, so that the cooling liquid forms rotary flow, scrap iron is concentrated and deposited, secondary pollution or pipeline blockage of the scrap iron is prevented, and the gear machining efficiency and quality are greatly improved.

The invention relates to efficient and energy-saving waste gas washing equipment. Comprising a washing tower cylinder and a gas inlet cylinder, and a waste liquid collecting box is fixedly connected to the bottom of the gas inlet cylinder; a plurality of rotational flow cylinders are connected between the washing tower cylinder and the air inlet cylinder, and a rotational flow plate and a dust falling assembly are mounted in each rotational flow cylinder; at least two filler supporting plates are fixedly connected in the washing tower cylinder, and each filler supporting plate is elastically connected with a filler cover plate; a spraying structure is arranged above each filler cover plate; the device further comprises a recycling and liquid feeding mechanism; a plurality of filler inlets and a plurality of filler outlets are formed in the washing tower drum; a valve plate device and a discharging slide way are mounted on each filler supporting plate; each filler cover plate is provided with a switching mechanism, the device further comprises a spline shaft movably connected with each switching mechanism, and the spline shaft is fixedly connected with a plurality of stirring and disturbing mechanisms; the device further comprises a rotary driving assembly and a reciprocating driving assembly. The filler can be disturbed regularly, the filler is loosened and prevented from caking under the condition that compaction is guaranteed, the filler can be rapidly replaced, the working efficiency is high, and the waste gas treatment effect is good.

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.

The invention discloses an efficient and high-precision numerical simulation method for an air cooling field of a diesel engine. The method comprises the following steps: (1) based on a porous medium model theory, using a defined porous medium model to replace an internal structure of an original radiator to establish a three-dimensional radiator simplified model containing a porous medium area; (2) according to the dimensionless similarity of speed distribution of a fan rotational flow main body section, the dissipation rate generation and diffusion term coefficient of a turbulent energy dissipation equation in a standard k-epsilon turbulence model are adjusted, (3) the standard k-epsilon turbulence model is adopted for a forced convection dominant area, the k-epsilon turbulence model corrected by the turbulent flow viscosity coefficient is adopted for a natural convection dominant area, and the turbulent flow viscosity coefficient of the natural convection dominant area is corrected. In order to guarantee smooth and stable transition of turbulence viscosity, a k-epsilon turbulence model corrected by turbulence viscosity coefficient linear interpolation is adopted for a transition area of forced convection and natural convection; and (4) a diesel engine air cooling field numerical simulation technology based on partition processing is adopted. According to the method, high-precision numerical simulation on the basis of a small number of grids is realized.

The invention discloses a high-temperature turbulent environment particle ignition combustion testing device based on rotational flow flame stabilization, and belongs to the field of combustion testing. The burner is composed of an external rotational flow flame stabilizing device, a central premixing burner, an adjustable turbulence intensity pore plate and a central powder supply pipe. High-temperature and high-speed methane turbulence flames are generated through the central premixing burner, flame stabilization is conducted on the high-temperature and high-speed turbulence flames through the external rotational flow flame stabilization device, and the turbulence intensity of the flames is improved. A high-speed turbulent flow field and a high-temperature flue gas range are constructed through high-temperature and high-speed methane flames, combustion of aluminum particles in the turbulent flow field is achieved, and the combustion rule of the aluminum particles in a complex flow field is researched and tested. The turbulence intensity of high-temperature and high-speed turbulence flame is changed by changing the pore density and the pore diameter of the adjustable turbulence intensity pore plate, and the gas ratio in the central premixing combustor, so that simulation of different fuel gas oxygen enrichment degrees, turbulence intensities and flame temperatures is realized, and test analysis of different turbulence intensities on the combustion process of condensed phase particles is realized.

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.

A centrifugal pump comprises a pump body, a volute and a driving impeller, the volute is arranged on the pump body, the driving impeller is arranged at the power output end of the pump body and located in the volute, the centrifugal pump is characterized by further comprising a pipe connector arranged at the water outlet end of the volute, and the water flowing direction of the pipe connector is perpendicular to the water outlet direction of the volute. The pipe joint is provided with a flow sensor, the flow sensor comprises a rotating impeller and a Hall element, the rotating impeller can enable water flow to generate rotational flow, and the rotating impeller is made of magnetized materials and can be rotatably arranged in an inner cavity of the pipe joint; and the Hall element is arranged on the outer wall of the pipe joint and corresponds to the rotating impeller. The rotating impeller rectifies water flow to achieve the noise reduction function, meanwhile, the rotating impeller is matched with a Hall element through a magnetized material to serve as a flow sensor, the flow sensor is integrated to the pipe connector, and the structure is more compact.

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 method for controlling a liquid chromatograph according to the invention is a method for controlling the liquid chromatograph including a liquid delivery pump, a flow path connected to the liquid delivery pump, a flow path switching valve (an auto purge valve, an injection valve, and a stream select valve) provided in the flow path and configured to switch a plurality of connection destinations for the flow path, and a pressure sensor configured to detect at least one of a liquid delivery pressure of the liquid delivery pump, a flow path pressure in the flow path, and a pressure applied to the flow path switching valve. The method includes rotating the flow path switching valve during liquid delivery from the liquid delivery pump, and determining whether a bubble remains in the flow path based on a pressure fluctuation when the pressure lowered by rotating the flow path switching valve increases.

The invention belongs to the technical field of ferrous metallurgy, and relates to a blowing oxygen lance nozzle for improving the steel scrap ratio of a converter and a blowing process. The main jet flow hole is formed in the bottom, the secondary combustion auxiliary holes are formed in the side wall, the secondary combustion auxiliary holes adopt the diverging pipe design mode, the secondary combustion oxygen flow outlet speed is reduced, interference to main oxygen jet flow caused by too high outlet speed is avoided, the secondary combustion efficiency is enhanced, meanwhile, the main oxygen jet flow is blown in through jetting gas in a rotational flow mode, and the secondary combustion efficiency is improved. The blowing stirring condition is improved, the stirring strength of the molten pool is enhanced, the heat and mass transfer process between the molten pool and the scrap steel is enhanced, the melting speed of the scrap steel is increased, and the uniform mixing time of the molten pool is shortened.

The utility model discloses a novel thickener which comprises a pool body, a tailing pipe and a dosing pipe, the pool body comprises an outer cylinder section and an inverted circular truncated cone section which are sequentially arranged from top to bottom, an overflow groove is formed in the outer edge of the top of the outer cylinder section, and the novel thickener further comprises a rotational flow sedimentation assembly arranged in the outer cylinder section; the blocking cover is sleeved with the outer cylinder section, the material distributing disc and the stirring blade are sequentially and rotationally installed at the axis position of the blocking cover from top to bottom, the outer diameter of the stirring blade is smaller than that of the lower edge of the blocking cover, and the stirring blade extends out of the blocking cover. And the tailing pipe and the dosing pipe are inserted into the blocking cover above the distributing disc. According to the utility model, the phenomenon of'running and mixing 'caused by overflow of fine-particle tailings can be effectively avoided; the rotational flow precipitation assembly is arranged in the outer cylinder section, so that stirring blades do not extend into the concentration area of the tank body, and the rake pressing phenomenon is avoided; the rotational flow precipitation assembly is simple in structure and can be completed through universal parts, and the cost is greatly saved.