354 results about "Liquid column" patented technology

The invention discloses a collaborative enhancement energy consumption mechanism and a support arm type fan tower drum damping device with the collaborative enhancement energy consumption mechanism, and relates to the technical field of engineering structure vibration, the collaborative enhancement energy consumption mechanism comprises a liquid column lever assembly and a plurality of inerter damping units symmetrically installed at the end of the liquid column lever assembly, and each inerter damping unit comprises a shell; the hydraulic damper and the linear-rotation converter are sequentially and axially installed in the shell from top to bottom, when the liquid column inclines, the first connecting plate is driven to drive the piston rod to stretch out and draw back, the piston rod drives the flywheel to rotate through the linear-rotation converter, and therefore vibration energy is transmitted to a fixed foundation structure through the second connecting plate to be dissipated; the invention further discloses a supporting arm type fan tower drum vibration reduction device, displacement of the vibration transmission part is transmitted to the liquid column lever through the connecting piece, the inerter damping unit is driven to stretch out and draw back, a complete energy consumption chain of the tower drum, the vibration transmission part, the connecting piece, the liquid column, the inerter damping unit and the ground is formed, and it is guaranteed that energy is stably transmitted to a fixed foundation structure.

The invention relates to the technical field of oil-water detection equipment, and discloses an oil-water detector and method based on a liquid mass resonance measurement principle. The oil-water detector based on the liquid mass resonance measurement principle comprises a parameter sensing unit which is used for contacting an oil-water mixed medium in a pipeline and comprises a current carrying body with a measurement cavity, a measurement probe arranged in the measurement cavity and a resonance body arranged in the measurement probe; and the data processing unit is in signal connection with the parameter sensing unit and comprises a signal transmitting module which is used for transmitting an audio frequency sweep frequency signal to the resonant body to excite liquid column resonance and transmitting electromagnetic short waves with a preset frequency to an oil-water mixed medium at the same time. According to the invention, direct measurement of the density and the dielectric constant is fused, the phase state is identified by using an intelligent algorithm, and the model is switched, so that the problem of failure of a single principle technology in a specific phase state is solved, and high-precision measurement in a water-in-oil state or an oil-in-water state in a full range from pure water to pure oil is realized.

The invention relates to the technical field of industrial process state monitoring, in particular to a photoresist filling state monitoring system and method. The system is characterized in that a micro-pressure pulse control unit acquires a reflection pressure change signal, establishes a corresponding relation between liquid column length and pressure, and outputs a pressure fracture judgment result; the acoustic sensing and judging unit is used for collecting a liquid column fracture sound pressure signal, constructing a non-contact liquid column end point state recognition mechanism and outputting an acoustic fracture judging result; the multi-channel intelligent decision-making unit uses a double-state doubt-tolerant self-certification mechanism to judge whether a pressure fracture judgment result is true or false, and outputs a final liquid column fracture judgment signal in combination with an acoustic fracture judgment result; and the filling process data recording unit records end point judgment related parameters, fracture judgment results and end point control feedback information in each filling process. According to the invention, micropressure pulse application and reflection pressure signal analysis are combined, and acoustic determination is introduced, so that the terminal point state of the photoresist filling tail end liquid column is accurately monitored.

The invention discloses a self-setting packer and belongs to the technical field of petrochemical engineering. The device comprises an upper connector and a lower connector, a lifting sleeve is installed in an inner hole of the upper connector, and the lower end of the upper connector is connected with an upper pressing ring through a deblocking shear pin; a rubber cylinder shaft is fixedly mounted on the outer side of the lifting sleeve, and a balance piston, a sealing sleeve, an upper pressing ring, a rubber cylinder and a sealing push cylinder are sequentially arranged on the rubber cylinder shaft in a sleeving manner from inside to outside; the lower end of the rubber sleeve shaft is connected with a central pipe through a locking sleeve; the lower end of the central pipe is in threaded connection with a lower joint; the sealing push cylinder sleeves the outer side of the central pipe, and the inner wall of the upper part of the sealing push cylinder is in sealing fit with the outer wall of the locking sleeve to form a primary vacuum piston cavity; the lower end of the sealing push cylinder is in threaded connection with a lower-stage piston, and a starting piston is installed on the outer side of the lower-stage piston in a limited mode through a shoulder. The packer can directly seat a well mouth after descending into a well in place along with a tubular column, pressing is not needed, the tubular column does not need to be lifted and put down, and automatic setting of the packer is achieved through timing liquid inlet and liquid column static pressure.

The invention discloses a water quality measuring device and method, and belongs to the technical field of analytical testing, the water quality measuring device comprises a light source, a first signal receiver and a buffer pool, the buffer pool is provided with a liquid inlet and a liquid outlet, the liquid inlet of the buffer pool is used for continuously inputting a to-be-tested sample, and the liquid outlet is used for continuously outputting the to-be-tested sample; the buffer pool is arranged in the buffer pool, water flow at a liquid outlet of the buffer pool forms a stable liquid column, the light source is arranged on the first side of the liquid column, the first signal receiver is arranged on the second side of the liquid column, light emitted by the light source penetrates through the liquid column and is received by the first signal receiver, and the first signal receiver is used for measuring the light intensity of the received light. Parameters to be tested in a water sample are tested in a non-contact mode, light emitted by the light source penetrates through the liquid column, and the change of a signal is detected through the first signal receiver and can be converted into the content / value of the parameters to be tested in the water sample, so that long-term reliable, accurate and stable water quality testing in various scenes can be met; the key technical problem urgently needing to be broken through in the current water quality monitoring field is solved.

The utility model discloses a Stirling heat engine teaching aid based on an auxiliary magnetic suspension system and a U-shaped liquid column, which comprises a support table, a glass U-shaped tube and a quartz tube, a high-frequency induction heater is arranged on the upper side of the support table, a heating induction coil of the high-frequency induction heater is sleeved on the quartz tube, the quartz tube is horizontally arranged, and the glass U-shaped tube is arranged on the quartz tube. A first sealing plug and a second sealing plug are respectively plugged at the two ends of the quartz tube, heat preservation steel wool is arranged at one section, close to the first sealing plug, of the interior of the quartz tube, and a heating iron ring is arranged in the center of the interior of the quartz tube and is positioned in a heating induction coil of the high-frequency induction heater. According to the utility model, through the design of the auxiliary magnetic suspension system and the U-shaped liquid column, the friction between the piston and the pipe wall is greatly reduced, the energy loss in the mechanical energy conversion process is effectively reduced, and the working principle of the Stirling heat engine and the application of the second law of thermodynamics can be intuitively displayed.

The invention relates to the technical field of new energy battery production, and discloses a new energy battery manufacturing-oriented process state monitoring system, which comprises a disturbance excitation module used for applying a controllable disturbance signal to a liquid column in a liquid injection process; the response acquisition module is used for acquiring a response signal of the liquid column under the disturbance effect; the state recognition module is used for recognizing the structural state of the liquid column based on the response signal and judging whether a liquid column discontinuous area or a bubble entrainment behavior exists or not; the control instruction generation module is used for generating a deviation correction control instruction when the liquid column state is judged to be abnormal; and the liquid injection execution module is used for receiving the deviation correction control instruction and executing liquid injection pause, exhaust or liquid injection rate adjustment operation. The system has the capability of active excitation and response acquisition of a liquid column state, the capability of state identification based on response behaviors, and the capability of process control of sending a correction instruction to a liquid injection execution module, and has the advantage of a process monitoring closed loop from abnormal identification to action response.

The utility model discloses a kind of liquid nitrogen storage tank pressure relief protection devices based on liquid column differential pressure control, belong to pressure vessel testing equipment field. Including liquid tank, air inlet and exhaust pipe and connecting pipe. Middle in liquid tank is provided with baffle, the baffle will the internal space of the liquid tank be divided into gas chamber and liquid chamber, liquid level control hole is opened on the side wall of the baffle far from the liquid chamber, the liquid level control hole of uppermost layer is located below the top edge of the baffle;The air inlet and exhaust pipe is vertically inserted in the top of the liquid tank, and the bottom end of the air inlet and exhaust pipe extends to below in the liquid chamber, the bottom end face of the air inlet and exhaust pipe is located below the liquid level control hole;The connecting pipe is vertically inserted in the bottom of the liquid tank, and the top end of the connecting pipe extends to in the gas chamber. The utility model is discharged by liquid column static pressure difference The pressure relief device of two-way protection of overpressure / negative pressure, especially applicable to the pressure test working condition of liquid nitrogen storage tank.

The engine system with communicating fluid vessels has first, second, and third fluid containers each containing a liquid fluid. At least one interconnecting lever conduit contains the liquid fluid and is rotatably coupled to the first, second, and third fluid containers. The interconnecting lever conduit is pivotal about an axis and defines a fluid passageway by which the first, second, and third fluid containers are in liquid fluid communication. At least one buoyant member and at least one holding tank are positioned in each of the first and third fluid containers. A tether is physically linking together the holding tank of each of the first and third fluid containers. Supplying the gas to the interior of the holding tank displaces some of the liquid fluid from the interior of the holding tank to increase a column height of the liquid fluid in the first, second, and third fluid containers.

The present application relates to a kind of three-dimensional pendulum tuning liquid inductance device, the inductance device includes tuning liquid column damper and tuning mass inductance container, tuning liquid column damper includes swing arm, ball hinge end head, swing arm connector, annular water tank and tuning liquid, swing arm one end is connected with ball hinge end head, the other end is connected with annular water tank by swing arm connector, tuning liquid is filled in annular water tank;Tuning mass inductance container is installed in the lower portion of tuning liquid column damper, ball hinge end head is connected with the structure to be damped, annular water tank swings and drives tuning mass inductance container to carry out energy consumption, the inductance device tuning period is adjustable.Compared with prior art, the present application has can control the vibration in each direction of the structure to be controlled, wide range of use;The parameters of each component can be flexibly adjusted to achieve the best damping effect, while tuning mass inductance container can realize the energy absorption of input structure with smaller space and achieve the two goals of energy dissipation and reduction of upper tuning liquid mass.

The invention relates to the technical field of ultrasonic welding, in particular to composite component nondestructive testing equipment which comprises a collaborative robot, an ultrasonic testing unit, a workpiece rotating unit and a workpiece rotating unit. A coupling cavity for accommodating a coupling agent, and a liquid inlet and a liquid outlet which are communicated with the coupling cavity are formed in the mounting seat, and the liquid outlet and a detection probe which extends into the coupling cavity and is immersed into the coupling agent are coaxially arranged; the collaborative robot drives the detection unit to execute detection, and the workpiece rotation unit and the workpiece rotation unit drive the workpiece to rotate and cooperate with each other, so that the detection unit can quickly reach a detection part, the detection efficiency is improved, a profiling motion track can be established to realize overall full-coverage detection, detection dead angles are inhibited, and the detection precision is improved. Meanwhile, the coupling agent forms a continuous liquid column between the liquid outlet and the workpiece, the detection probe emits ultrasonic waves, and the ultrasonic waves are transmitted in the liquid and enter the workpiece for nondestructive detection.

The invention discloses a defoaming and filling device and method for a water reducing agent, and mainly relates to the technical field of liquid filling. Comprising the following steps that S1, a box body with an inner bag is conveyed to a line from a conveying unit; s2, a filling opening of the inner bag is fixed to the center position of a box opening in the top of the box body; s3, on the basis of the positioning unit, vertical plates are arranged in the box body, and the vertical plates move from the two sides of the box body to the center to gather the inner bags between the limiting faces, S4, under the state that the distance between the limiting faces is 10-20 cm, filling operation is started, when the liquid level of the inner bags is close to a filling opening, the liquid level is kept not lowered, the two vertical plates are started to slowly move outwards in the reverse direction, and filling operation is completed. And when the vertical plate moves outwards to approach the inner wall of the box body, the vertical plate is lifted to be separated from the box body. The filling device has the beneficial effects that the high liquid level is kept in the filling process, the bubble problem caused by liquid column fall is remarkably solved, and the working efficiency is improved.

The invention relates to the technical field of quenching equipment, in particular to automatic integral quenching equipment for a pivotal bearing, which comprises a chassis, and further comprises a control cabinet and an intermediate frequency cabinet both fixedly mounted at the top of the chassis; the quenching box is mounted at the top of the chassis; the circulating water cooling system is mounted at the top of the chassis and is used for carrying out cooling circulation on the equipment; the quenching liquid circulating system is used for recovering the quenching liquid and performing cooling circulation reutilization; the rotating table is mounted at the top of the chassis through a rail, a quenching assembly is mounted at the top of the rotating table, and the quenching assembly is used for being matched with a quenching liquid circulating system to guide quenching liquid to pass through a workpiece on the rotating table in a flowing mode for quenching; according to the device, the quenching liquid is changed from spraying to immersing the workpiece firstly and then flowing and discharging, so that the whole surface of the workpiece is instantly and completely coated by a uniform and static liquid layer, and non-uniform cooling and local steam film retention caused by non-uniform impact angle and flow of a liquid column during spraying are eliminated.

The application discloses a pulsation uniform heating plate type plate-pen notebook computer radiator, which comprises a bottom plate, a pulsation channel is arranged on the bottom plate, a cover plate is arranged on the pulsation channel, the pulsation channel is a closed air channel structure, refrigerant is arranged in the pulsation channel, and the pulsation channel is a negative pressure structure. When the device is implemented, the pulsation channel is filled with refrigerant. Because the pulsation channel is small enough, the air bubble column and the liquid column are arranged in an interval and in a random distribution state. In a high-temperature area, the refrigerant absorbs heat to generate air bubbles, which expand and increase pressure rapidly, push the refrigerant after heat absorption to flow to a low-temperature area, and the air bubbles in the low-temperature area are cooled, shrink and break, and the pressure decreases. Because there is a pressure difference between the two ends and a pressure imbalance between adjacent pulsation channels, the refrigerant oscillates between the high-temperature area and the low-temperature area, so that heat transfer is realized. In the whole process, external mechanical work and electric work are not consumed, and self-oscillation under thermal driving is realized.

This invention provides a method for dynamic prediction of cement slurry weight loss in long inclined vertical well sections. The method includes: calculating the effective bottom hole pressure P during the cement slurry weight loss process. b Effective pressure at the bottom of the well, P b The calculation formula is: P b = P0 + P1; where P0 is the liquid column pressure at the top of the cement slurry; P1 is the effective pressure of the cement slurry; the calculation of the effective pressure P1 of the cement slurry includes determining the remaining pressure P after the cement slurry gels and loses weight, taking into account the eccentricity of the tailpipe and the downhole temperature and pressure. sy The residual pressure P after the cementation and weight loss of the mud obtained by this invention sy The calculations are more consistent with the gelation and weight loss characteristics of cement slurry under complex downhole conditions, effectively ensuring the accuracy of dynamic prediction of cement slurry weight loss.

The invention provides a rock triaxial anti-drilling strength optimization calculation method and device based on drilling fluid parameters, and relates to the technical field of crossing of petroleum drilling engineering and rock mechanics. The method comprises the steps that logging information and drilling parameters of a target stratum are obtained; determining pore pressure, maximum horizontal principal stress and minimum horizontal principal stress according to the logging information; based on the drilling parameters, the drilling fluid circulating liquid column pressure is determined, and the drilling fluid circulating liquid column pressure serves as axial stress; determining a first underground confining pressure and a second underground confining pressure according to the pore pressure, the maximum horizontal principal stress and the minimum horizontal principal stress; and selecting a compressive strength criterion according to different rock characteristics, and determining the triaxial compressive strength of the rock in combination with the axial stress, the first underground confining pressure and the second underground confining pressure.

A discrimination system is provided. A discrimination system forms a liquid column and interrogates an object within the liquid column with an excitation source. The optical arrangement collects output electromagnetic radiation emanating from an excited object disposed within the liquid column and directs the output electromagnetic radiation to the detector. The analyzer reduces the positional correlation of the detected intensity by normalizing the value based on the position of each object.

The application relates to an efficient flowback device and method for testing a horizontal well of super-deep water and super-shallow gas, which comprises a wellhead device, a first data monitoring device, a replacement slurry water injection device, a coiled tubing, a coiled tubing gas injection device, a data processing and response device and a flowback fluid treatment device; the coiled tubing is connected with the replacement slurry water injection device and the coiled tubing gas injection device through the wellhead device; the first data monitoring device is arranged on the lower side of the wellhead device, and the flowback fluid treatment device is connected with the side of the wellhead device; the data processing and response device is connected with the replacement slurry water injection device, the coiled tubing gas injection device, the flowback fluid treatment device and the first data monitoring device through transmission optical fibers. The application adopts a collaborative scheme of pre-reducing liquid column pressure by using replacement slurry water and injecting gas through the coiled tubing to realize efficient removal of liquid accumulation in the whole horizontal section under the premise of protecting the reservoir and avoiding well leakage, thereby providing technical support for testing and development connection of super-deep water and super-shallow gas reservoirs.

The utility model relates to the field of acid distributors, and discloses a wave absorbing device for an acid distributor, which comprises a box body arranged in an acid distributing tank, and the box body comprises an outer box body and an inner box body arranged in the outer box body; the outer box body is composed of a cover plate and side plates. The inner box body is composed of a top plate and end panels, and filtering holes are drilled in the top plate and the end panels on the two sides; the inner box body is welded and fixed in the middle of the outer box body through the top plate and the side plates of the outer box body; round holes are formed in the centers of the cover plate of the outer box body and the top plate of the inner box body, so that acid distribution branch pipes are convenient to mount. Through the design of the filter holes and the pull rod, solid particles in acid liquor are effectively intercepted, the blocking risk in the acid distribution tank is reduced, meanwhile, the maintenance cost is reduced, the flow speed is reduced when the acid liquor flows out of the filter holes, the liquid level is stabilized, a liquid column is prevented from splashing, and the safety of operators is protected.

The embodiment of the invention relates to a method and equipment for detecting a spray head and a spraying system. The spray head comprises a plurality of spray needles, and the spray needles are used for outputting a plurality of liquid columns formed by target liquid. The method for detecting the spray head comprises the following steps: acquiring an acquired target image, wherein the target image at least indicates at least one liquid column in the plurality of liquid columns; and determining the shape attribute of the at least one liquid column according to the target image so as to determine the state of the nozzle, wherein the shape attribute comprises at least one of the length of the liquid column and the extension direction of the liquid column. According to the technical scheme, the shape attribute of the liquid column formed by the target liquid output by the spray needle of the spray head can be detected, and therefore whether the state of the spray head meets the expectation or not is determined.

The invention discloses an infusion device which comprises a back condensation cover, a curved pipe and an air release valve. An atomizer is arranged in the recondensation cover, a top end liquid adding hole and a bottom end outlet are formed in the recondensation cover, and the top end liquid adding hole is directly communicated with a liquid inlet port of the atomizer; one end of the curved tube is connected with a bottom end outlet of the back-coagulation cover, and the other end of the curved tube is connected with an inlet of the air escape valve of which an outlet is connected with the infusion needle through the infusion tube; according to the invention, a plurality of photoelectric sensors are matched to accurately monitor the dripping speed of liquid drops and the length of a liquid column, and the control system is combined to intelligently adjust the atomizer, the condenser and the electric switch, so that the high-precision control of the infusion speed is realized. Risks caused by too fast or too slow infusion can be effectively avoided, and the safety and effectiveness of infusion treatment are improved; by means of the atomization technology and atomization recondensation operation, infusion liquid is subjected to deep purification treatment, and tiny particle impurities are removed.

The invention relates to the technical field of pharmaceutical analysis equipment, and discloses pharmaceutical active component quantitative analysis equipment which comprises a chromatographic column, the chromatographic column comprises a hollow column body, a filter screen is fixedly arranged at the lower end in the column body, a stationary phase is arranged above the filter screen, a piston is arranged above the stationary phase, and the piston is connected with a driving part; the piston comprises a first shell facing the stationary phase, a second shell is coaxially arranged on the side, away from the stationary phase, of the first shell in a sliding mode, an elastic supporting piece is arranged between the first shell and the second shell, a plurality of connecting holes are coaxially formed in the bottom of the first shell and the bottom of the second shell, liquid discharging columns are arranged in the connecting holes, and liquid inlets are formed in the tops of the liquid discharging columns. A liquid outlet is formed in the side wall of the bottom of each liquid discharging column, the multiple liquid discharging columns are connected with a driving mechanism, and the second shell is connected with a liquid inlet pipe. According to the invention, the state of a stationary phase bed layer can be actively adjusted, and uniform introduction and dispersion of liquid medicine are realized, so that the chromatographic separation efficiency and the quantitative analysis accuracy are improved.

The invention provides a 3D printing device and a 3D printing method of a liquid material. The 3D printing device comprises a rod body with a tip end. The container is provided with a bottom surface, a hole allowing the tip of the rod body to reciprocate is formed in the bottom surface, and the container is further provided with an opening and closing part capable of opening or closing the hole; the container is used for containing a liquid material for 3D printing, and after the hole is in an open state and the tip end of the rod body moves out of the container from the interior of the container through the hole, the contained liquid material penetrates through the hole under the action of gravity and converges to the tip end from the outer wall of the rod body to form a liquid column; a substrate for receiving a liquid column. According to the 3D printing device, the rod body serves as a nozzle, the outer wall of the rod body serves as an outer flow channel, liquid materials flow in a thin film mode in the printing process, high-precision extrusion is achieved, and the problems that materials are difficult to print and blocked are solved.

The invention discloses an annular air column volume optimization method and device for preventing an oil and gas well annular temperature and pressure effect. The method comprises the following steps: determining annulus thermal resistance of an annulus section according to heat conductivity coefficients of an annulus air column and an annulus liquid column, and further determining radial heat transfer thermal resistance of the annulus section; according to the dimensionless formation temperature, the friction coefficient between an oil pipe and fluid, the radial heat transfer resistance of an annulus section and the formation temperature, the annulus liquid column temperature change and the annulus liquid column average temperature are determined respectively, and a first equation representing the relation among the annulus liquid column temperature change, the annulus pressure increment and the annulus liquid column volume variation is established; the second equation is used for representing the relationship among the average temperature of the annular air column, the annular pressure increment and the volume of the annular air column; an annular pressure increment is obtained according to the current annular air column length solving equation; and the length of the annular air column is modified until the determined annular pressure increment meets the control value, and the optimal annular gas injection amount is obtained. The method provides data guidance for preventing the annulus pressure induced by the temperature-pressure effect.

The invention relates to the technical field of reactor residual heat removal, in particular to a residual heat removal pipeline condensation water hammer suppression system and method based on air filling, and the system comprises a loop subsystem, a natural circulation loop, an air injection subsystem and an ocean heat trap; the loop subsystem comprises a reactor core, a pressure container and a coolant circulating pipeline; the natural circulation loop comprises an intermediate heat exchanger, a seawater circulation pipeline and a high-temperature steam pipeline, the intermediate heat exchanger is connected with a loop subsystem, the seawater circulation pipeline is connected with the intermediate heat exchanger and the ocean heat trap, and the high-temperature steam pipeline is connected with an outlet of the intermediate heat exchanger and the ocean heat trap; the gas-phase system formed by mixing air and steam is used for avoiding generation of local negative pressure after steam condensation, condensation water hammers caused by liquid column collision are inhibited from the source, the risks of instantaneous high pressure, pipeline oscillation and the like can be effectively reduced, and the device adapts to the special structure and low-pressure operation attribute of the ocean floating nuclear energy platform.

This invention discloses a residual liquid removal structure and method for an eye dropper, comprising: a bottle body, a dropper shell, a dropper column, and an annular sealing gasket. The dropper shell is connected to the bottle body and has a flow channel. An outlet is located at the top of the flow channel, and an annular sealing gasket is located at the connection between the outlet and the flow channel. The dropper column is located within the flow channel of the dropper shell, and includes a T-shaped section and a conical section. The conical section passes through the annular sealing gasket and the outlet and extends outward from the dropper shell. The inner ring of the annular sealing gasket is sealed to the outer wall of the conical section. Several guide grooves are evenly distributed on the dropper column. The advantages of this invention are: after dispensing, releasing the bottle body pushes the liquid film adhering to the conical section of the dropper column and the liquid suspended at the end of the conical section away from the conical section, allowing it to be dispensed into the user's eye without waste. Furthermore, it keeps the conical section exposed to air dry, thus preventing bacterial growth.

The utility model relates to a viscometer. The viscometer comprises a cross arm, one end of the oblique arm is connected with the cross arm, the connecting position is a turning position, a first measuring piece is arranged on the turning position and used for recording the first height of the sample liquid column, and an injection port is formed in the end, away from the turning position, of the cross arm; one end of the plumbing arm is connected with the other end of the inclined arm, a second measuring piece and a third measuring piece are arranged on the plumbing arm, and the second measuring piece and the third measuring piece are used for measuring the flowing time of the sample; communicated sample flowing paths are arranged in the cross arm, the inclined arm and the plumbing arm, a vertical small pipe is arranged in the tail end of the cross arm, and the viscometer provided by the utility model can realize accurate control of the height of a measured liquid column and ensure the consistency of height measurement of the liquid column and the accuracy of a viscosity measurement result.

An X-ray source is provided comprising a target generator configured to generate a liquid jet having an elongated cross with a major axis and a minor axis; an electron source configured to generate an electron beam arranged to interact with the liquid jet in an interaction region to generate X-ray radiation; and an X-ray transparent window arranged to transmit X-ray radiation generated in the interaction region, wherein the X-ray transparent window is located for extraction of X-ray radiation at an angle α relative to the major axis; wherein the target generator is configured to generate the liquid jet such that said jet has a thickness at the interaction region, along a propagation direction of the electron beam, that is less than an electron penetration depth of the electron beam in the liquid jet. A corresponding method for generating X-ray radiation is also provided.

The invention relates to the technical field of micron-sized droplet jet flow and ink jetting, in particular to an acoustically-driven micro-droplet jetting method and device, and the method comprises the steps that to-be-jetted liquid is stably conveyed to a nozzle micropore assembly; generating an ultrasonic signal, and driving an ultrasonic transducer after power amplification; the resonant vocal cavity nozzle is driven by the ultrasonic transducer, and a stable standing wave sound field with a sub-wavelength scale is formed in the cavity; acoustic radiation force is used for acting on a liquid column at the end of the spray head, and non-contact separation and directional spraying of liquid drops are achieved. The nozzle is controlled by the multi-axis motion platform to move on the substrate, so that liquid drops are deposited according to a preset track. According to the method and the device, the problems of nozzle blockage and the like caused by high viscosity or high solid content of liquid in a traditional piezoelectric or electrofluid driving mode are solved; the control precision of the liquid drop size and the spraying speed can be remarkably improved, and the device has excellent fluid adaptability and spraying stability and is particularly suitable for precise deposition and graphical jet printing of complex fluid such as photoresist, metal slurry and functional nano materials.

This invention discloses an on-demand metal jet forming method based on forced vibration, belonging to the field of 3D printing technology, including the following steps: Step 1, calculating the resonant frequency f of the molten metal column in the nozzle. n Step 2: Determine the excitation frequency f of the forced vibration system; Step 3: Input an excitation signal with frequency f into the forced vibration system, which drives the nozzle to vibrate axially; The forced vibration of the nozzle includes an unstable start-up stage and a stable stage. After the nozzle vibration enters the stable stage, a stable metal droplet jet with frequency f is generated; Step 4: After obtaining the stable metal droplet jet, the base plate is subjected to three-dimensional motion, and metal deposition is performed using the metal droplet jet to complete the forming of the metal component. The spraying frequency of this invention can reach tens of thousands of hertz, which can greatly improve the manufacturing efficiency of droplet-spraying metal additive manufacturing.