43results about How to "Achieve flow control" patented technology

The invention relates to a bellows-type piezoelectrically-hydraulically-actuated microfluidic servo valve and an actuating device thereof and belongs to the technical field of microfluidic control. The problems of poor sealing reliability and instability in amplification factors of hydraulic amplification by means of matching piezoelectric actuating with a hydraulic amplifier in existing microfluidics are solved. A first accommodating cavity retainer of the servo valve is in the shape of a drum, a through hole is arranged at the center bottom of the drum, a piezoelectric diaphragm covers and is fixed on the first accommodating cavity retainer, an outlet side of the first accommodating cavity retainer and an inlet side of a second accommodating cavity retainer are communicated in a sealing manner through a bellows, and an elastic diaphragm covers and is fixed on an outlet side of the second accommodating cavity retainer. The actuating device comprises a piezoelectric servo amplifier, a digital-to-analog converter, a microprocessor, an analog-to-digital converter and a pressure sensor. The bellows-type piezoelectrically-hydraulically-actuated microfluidic servo valve and the actuating device thereof are applicable to a piezoelectrically-hydraulically-actuated microfluidic system.

The invention discloses an air inlet channel structure and a manufacturing method thereof. The air inlet channel structure is S-shaped or serpentine, a plurality of shark skin scale-shaped structuresare arranged on the inner wall of the air inlet channel structure, the shark skin scale-shaped structures are arranged in an array mode in the circumferential direction or the axial direction of the air inlet channel structure, and the arrayed array density is different, when axial arrangement is conducted, the array density arranged at the two sides of a large bent angle in the arraying mode is larger than that of the array arranged in the other areas in the arraying mode. According to the air inlet channel structure, the separation flow of a boundary layer of the air inlet channel is controlled, the problems that an existing air inlet channel flow control mode needs to increase additional energy and an auxiliary mechanism as well as the self-adaptive performance is poor are solved; and the circumferential or axial array arrangement mode of the shark skin scale-shaped structures can inhibit the flow separation of the boundary layer in a maximal and continuous mode, and the air inlet channel structure is wider in applicability.

The invention discloses an automatic vacuum electrolyte filling device comprising a rack body, a vertical beam, a numerical control platform, a vacuum filling head, a numerical control computer system touch screen, an electrolyte hopper and a battery installation fixture. The bottom end of the vertical beam is perpendicularly connected with the rack body, the battery installation fixture is installed on the top end of the rack body, the battery to be filled is installed on the battery installation fixture, the top end of the vertical beam is connected with the numerical control computer system touch screen, the vacuum filling head is connected with one end of the numerical control platform, and the electrolyte hopper is connected with the other end of the numerical control platform. According to the device provided by the invention, the stable and reliable two-dimensional numerical control platform is used for achieving motion positioning of the filling head, and filling of the electrolyte with precision less than 0.5ml is automatically completed; information such as battery pack size parameters and capacity of the electrolyte to be filled into the single battery can be input via the computer system touch screen of the device, and position computation of each filling hole is achieved by using a computer.

The invention discloses a flow control method and device for zinc liquid in a hot galvanizing zinc pot. The control method disclosed by the invention comprises the following steps: promoting zinc liquid (2) to respectively outwards diffuse and flow towards areas (I, II, III and IV) formed among the left side, right side and front end of the zinc pot, strip steel and a furnace nose (4) by virtue ofthe blowing effect of an air knife above the hot galvanizing zinc pot (1) on the strip steel (3), and dragging top ballast which is rapidly produced on the surface of the zinc liquid to outwards flowtowards the area; arranging multistage traveling wave magnetic field generators (71, 72, 73, 74, 75, 76, 77 and 78) above the surface of the zinc liquid in the zinc pot on the edge sides of the areasso as to excite the traveling wave magnetic field to generate electromagnetic propulsion on the zinc liquid so as to drive the zinc liquid to flow, mutually linking the zinc liquid flow caused by thetraveling wave magnetic field generators with blowing flow of the air knife, and promoting the zinc liquid on the surface of the zinc pot to orderly flow towards the rear end (the Vth area) of the zinc pot; dragging the top ballast floating on the surface of the zinc liquid to flow according to the control direction by the flowing zinc liquid.

The invention relates to a DC interline power flow controller. The DC interline power flow controller comprises a first terminal, a second terminal, a third terminal and a fourth terminal, wherein the first terminal is connected with a first power transmission line, the third terminal is connected with a second power transmission line, the second terminal and the fourth terminal are connected in parallel and then are connected with a third power transmission line, power flows to the third power transmission line from the first power transmission line and the second power transmission line, the DC interline power flow controller comprises a bidirectional DC / DC converter and a solid-state transformer, the bidirectional DC / DC converter is connected in series with the solid-state transformer, input ends of the bidirectional DC / DC converter are the first terminal and the second terminal, an output end of the bidirectional DC / DC converter is connected with an input end of the solid-state transformer, and output ends of the solid-state transformer are the third terminal and the fourth terminal. By the DC interline power flow controller, DC electric energy flow control can be achieved, the isolation of a circuit is achieved by using the solid-state transformer, and the circuit structure is simple.

The invention provides a synthetic jet actuator which performs periodic air blowing and suction through repeated oscillation of a piezoelectric film to convert consumed electric energy into fluid kinetic energy. The synthetic jet actuator comprises a cavity, the long-strip-shaped piezoelectric film, a long-strip-shaped piezoelectric actuator and an air bleeding channel; the cavity has a lower opening and an upper opening; the area of the section of the lower opening is larger than that of the section of the upper opening; the long-strip-shaped piezoelectric film covers the lower opening in a matched manner; the long-strip-shaped piezoelectric actuator is arranged below the piezoelectric film; the air bleeding channel is connected with the upper opening in a matched manner; and the long-strip-shaped piezoelectric actuator is driven by a rectangular pulse signal to have the inverse piezoelectric effect, the piezoelectric film is driven to oscillate up and down periodically, air in the cavity oscillates along with the piezoelectric film, and then the periodic air blowing and suction effect is produced in the air bleeding channel. The invention further provides a horizontal-axis wind turbine blade comprising the synthetic jet actuator. By the aid of the blade, flowing control can be realized, so that the strength of the trailing vortex of a wind turbine is reduced, the dissipationof the trailing vortex is accelerated, oscillation of the wind turbine blade is reduced, and the service life of the wind turbine is prolonged.

The invention discloses a slotting type wind turbine blade device and a slotting method thereof. The slotting type wind turbine blade device comprises a blade body; the blade body comprises a positivepressure face and a back pressure face; a gap communicating with the positive pressure face and the back pressure face is formed inside the blade body, the gap comprises a gas inlet located in the positive pressure face and a gas outlet located in the back pressure face, and after gas flows into the gap from the positive pressure face and then flows out from the back pressure face. The slotting method thereof has the beneficial effects that an extra gas source is not needed, an extra device does not need to be additionally arranged on the surface of a fan blade, and flow control is achieved;high-pressure gas on the positive pressure face is introduced into a low-pressure area on the back pressure face, so that the flow velocity of the positive pressure face is reduced, the pressure of the positive pressure face is increased, in addition, the flow velocity of the back pressure face is increased, the pressure of the back pressure face is reduced, and the lift of the blade is further improved. Compared with the mode that a vortex generator is directly installed on the surface of the blade, damage to the surface of the blade is small, extra resistance cannot be brought under the small attack angle, and it is guaranteed that the aerodynamic performance in the non-flow control state is not reduced.

The invention discloses a method and a device for controlling the flow of zinc liquid in a hot-dip galvanizing pot. The control method of the present invention is: the blowing effect of the air knife above the hot-dip galvanizing zinc pot (1) on the strip steel (3) promotes the zinc liquid (2) to the left side, the right side, the front end of the zinc pot, and the strip steel The area (I, II, III, and IV) formed between the furnace nose (4) diffuses and flows outwards, and drags the rapidly generated surface slag on the surface of the zinc liquid to flow outwards to the area; in the area On the edge side, multi-stage traveling wave magnetic field generators (71, 72, 73, 74, 75, 76, 77, 78) are set above the surface of the zinc liquid in the zinc pot to excite the traveling wave magnetic field to generate electromagnetic driving force for the liquid zinc to drive the liquid zinc to flow , the zinc liquid flow caused by the traveling wave magnetic field generator is connected with the spray flow of the air knife to promote the orderly flow of the zinc liquid on the surface layer of the zinc pot to the rear end of the zinc pot (the V zone); the surface floating on the surface of the zinc liquid The slag is dragged by the flowing zinc liquid to flow in a controlled direction.

The invention relates to the technical field of engineering surveying, in particular to an engineering surveying pay-off device. Comprising a base, two supporting plates are installed on the upper end face of the base in a bilateral symmetry mode, U-shaped grooves are formed in the upper ends of the two supporting plates, winding devices are arranged on the U-shaped grooves, arc-shaped blocks are arranged below the winding devices, the arc-shaped blocks are installed on the upper end face of the base, and sliding grooves are evenly formed in the rear sides of the upper end faces of the arc-shaped blocks; an isolation cover is installed on the sliding groove in a sliding fit mode, a pull rod is arranged on the front side of the isolation cover, the pull rod is installed on the circumferential outer wall of the isolation cover, a clamping groove is formed in the end face of the front side of the arc-shaped block, an ink moistening device is installed on the clamping groove, a clamping opening is formed in the front side of the upper end face of the arc-shaped block, and an elastic piece is arranged in the clamping opening; the front side end part of the isolation cover is inserted into the bayonet and is fixed with the elastic sheet in an abutting manner; according to the invention, the ink fountain cotton thread is convenient to replace, the continuous use time of the ink fountain is prolonged, and the service life of the ink fountain is ensured.

The invention relates to the technical field of medical instruments, in particular to a portable low-temperature cryoscalpel. The portable low-temperature cryoscalpel comprises a nozzle, a steel cylinder and a switch mechanism. The portable low-temperature cryoscalpel is characterized in that the mouth of the steel cylinder is connected with the nozzle through the switch mechanism, and the steel cylinder is a detachable steel cylinder. Compared with the prior art, the portable low-temperature cryoscalpel has the advantages that the low-temperature steel cylinder can be independent of other control and spraying units, and different sizes or types of steel cylinders are available; the diameter of the tail end of a flow channel inside the nozzle is 0.03-0.1mm, and different treatment strategies can be worked out through matching between the nozzle and the steel cylinder; in addition, due to the fact that a labyrinth sealing method is adopted between the flow channel and an ejector pin device, leakage of high-pressure low-temperature liquid gas and loss of local cold energy are effectively avoided, the frequency of replacement of the steel cylinder and the frequency of liquid filling are greatly reduced, and treatment cost and maintenance cost are reduced; the portable low-temperature cryoscalpel can be widely used in the fields such as clinic treatment of various dermatoses, skin beauty and pet nursing; the portable low-temperature cryoscalpel is compact and exquisite in structure, simple in operation, and convenient to carry.

The invention discloses an active flow control system for wing-body fusion underwater glider, which relates to the field of flow control, including an electromagnetic flow control actuator unit installed on the front end of the upper surface of the wing of the underwater glider, and an The position where the electromagnetic flow control actuator unit is installed on the surface is alternately provided with a steady jet port and a synthetic jet port; a steady jet flow control actuator unit is provided below the steady jet port, and a synthetic jet port is provided below the synthetic jet port. The flow control actuator unit; the electromagnetic flow control actuator unit, the steady jet flow control actuator unit and the synthetic jet flow control actuator unit are respectively connected with the signal processing and control system, and the signal processing and control system is connected with sensors, The sensor is fixedly arranged on the wing of the underwater glider. The invention can realize the flow control objectives of different parts on the underwater glider under different flow control strategies.

The invention provides an authigenic heat injection composition for underground catalytic oxidation of crude oil. The injection composition is a three-phase stable disperse system composed of water phase (anionic surfactant), an auxiliary agent, solid phase (nano-catalyst) and gas phase (air); the injection composition comprises the following raw materials: 0.1-1% of anionic surfactant taken as water phase, 0.1-1% of auxiliary agent, 0.1-1% of nano-catalyst taken as solid phase, and the balance of water, wherein the sum of the mass percent of the water phase, the auxiliary agent, the solid phase and the water is 100%; the volume ratio of the adding amount of the air to the total amount of the water phase, the auxiliary agent, the solid phase and the water is (3-7): 1. After the injection composition is adopted, the sweep efficiency of the air can be improved, the synchronous carrying of the catalyst and the air can be realized, and the problem of separation of underground air and catalyst can be avoided; the composition contains the efficient nanometer oxide catalyst, and the crude oil can be catalyzed to have oxidation reaction under the mild conditions, and therefore the problem that the stratum is blocked by coking caused by severe oxidation reaction is effectively avoided.

The invention relates to a resonant DC interline power flow controller. The resonant DC interline power flow controller comprises a left-end energy flow direction controller, a resonant solid transformer and a right-end energy flow direction controller, wherein input ends of the left-end energy flow direction controller are a first terminal and a second terminal and an output end is connected with the resonant solid transformer; the output end of the resonant solid transformer is connected with the input end of the right-end energy flow direction controller and the output ends of the right-end energy flow direction controller are a third terminal and a fourth terminal; and the resonant solid transformer is a bidirectional resonant converter. The DC interline power flow controller is capable of achieving flow control of DC energy in any direction; isolation of a circuit is achieved by using the resonant solid transformer; and the circuit efficiency is improved.

The invention discloses a device for controlling the reaction of a microfluidic chip by using a camshaft. The device uses a camshaft with multiple cams to control multiple links in the reaction process of the microfluidic chip that need to be driven by pressure, such as the time-sharing release and flow control of various liquid reagents in the chip, gas The flow control, as well as the chip locking and other functions that need to be realized by mechanical pressing, the timing of the reaction can be automatically controlled by the curve profile of the cam, the installation sequence, and the rotation speed. The invention provides a feasible technical solution for the miniaturization of the analysis and detection device of the microfluidic chip, making it easier to be commercialized and having wider application prospects.

The invention relates to a preparation method and a functionalization method of a light-induced infiltration microfluidic chip. The surface of the chip is modified by a light-induced hydrophilic and hydrophobic material, and a hydrophilic and hydrophobic region boundary area is generated in the microstructure by ultraviolet exposure. An infiltration region can allow a fluid to pass through, and the fluid cannot enter a non-hydrophobic region subjected to Laplace pressure between columns, so that microfluidic channels are realized. By use of a photomask, exposure of different designs can be realized inside the chip, and different structures and functions of microfluidic chips are realized. Through the design of pressure-driven fluid channels and electroosmotic flow-driven fluid channels, the microfluidic chip can be erasable and can realize multifunctions on a single chip, and the production cycle and cost of design-fabrication-testing-reprocessing needed by traditional chips can be reduced. All the functions such as separation, synthesis, mixing and flow control of the microfluidic chips can be realized.

The invention provides an impeller, a blade and a blade section of a wind power generating set, the blade section includes a blade front section and a blade rear section, the blade front section includes a first main body, and the first main body includes a first connecting surface; the blade rear section includes a second main body and a blade rear section. The airbag, the second body is made of flexible material, the second body includes a second connection surface, the second body is fixedly connected with the first body; a cavity is arranged in the second body, the airbag is accommodated in the cavity, and the airbag includes an airbag wall , there is an air chamber in the airbag wall, when the environmental parameters at the location of the wind turbine meet the set parameter conditions, the volume of the gas in the air chamber increases, squeezing the airbag wall, causing the airbag wall to expand and squeeze the cavity The inner wall of the second main body expands at the corresponding position; when the environmental parameters meet the set parameter conditions, the blade stalls. The invention can effectively reduce the risk of blade stall.

The invention relates to the technical field of infrared spectrometer detection and discloses an expiration detector gas detection device. The device comprises a gas chamber, a detection part and a control circuit, wherein the air chamber comprises more than one air chamber pipe, medium pipes corresponding to the air chamber pipes, a first connecting piece and a second connecting piece, the detection part comprises a light source and a detector which are respectively arranged on two sides of the air chamber and form a light path, the control circuit comprises a main board and a preamplifier board which are electrically connected with each other, the main board provides a pulse type constant current source, and the pulse type constant current source is used for supplying power to the light source in the light path; the front amplifier board is used for amplifying, filtering and rectifying the electric signal to form a light intensity voltage signal. According to the device, a liquid medium sleeve structure is additionally arranged on the periphery of a current gas chamber structure, so the temperature of gas in the gas chamber changes slowly, uniformly and stably, the influence on a test result is reduced, and meanwhile, a more reliable pulse circuit is adopted to control light waves, the power-on working time of the light source is shortened, the service life is longer, and flexibility is relatively high.