27 results about "Spray cone" patented technology

The invention relates to a fuel injector of an internal combustion engine and an internal combustion engine, in particular, the fuel injector has a first nozzle needle which interacts with a first fuel injection bore such that the first nozzle needle opens or blocks a fuel flow of a first fuel through the first fuel injection bore depending on its position, and has a second nozzle needle which interacts with a second fuel injection bore such that the first nozzle needle opens or blocks a fuel flow of a second fuel through the second fuel injection bore depending on its position. And a second nozzle needle interacting with the second fuel injection hole and the third fuel injection hole such that the second nozzle needle blocks or opens a fuel flow of the second fuel through the second fuel injection hole and the third fuel injection hole depending on its position, or opening a fuel flow of the second fuel through the second fuel injection hole and blocking the fuel flow of the second fuel through the third fuel injection hole, the first fuel injection hole being configured to inject the first fuel into the combustion space in a first spray cone, and the second fuel injection hole being configured to inject the second fuel into the combustion space in a second spray cone; a second fuel injection hole is configured to inject a second fuel into the combustion space in a second spray cone, and a third fuel injection hole is configured to inject the second fuel into the combustion space in a third spray cone.

The invention belongs to the field of aero-engines and gas turbine combustion chambers, relates to an engine nozzle design technology, and provides a centrifugal nozzle design method which comprises the following steps: calculating a geometric constant initial value of a nozzle according to a given spray cone angle; according to the nozzle geometric constant initial value and the nozzle geometric constant increment, taking the relative radius of a hollow vortex as a constraint condition and taking a spray cone angle as a convergence condition, and obtaining a converged nozzle flow coefficient and a converged nozzle geometric constant; according to the flow coefficient of the nozzle after convergence, the geometric constant of the nozzle after convergence and the given flow number of the nozzle, the geometric dimension of the nozzle is obtained; and establishing a nozzle geometric model through the nozzle geometric dimension, and evaluating and correcting the nozzle geometric dimension by adopting a three-dimensional simulation method to obtain the final nozzle geometric dimension. According to the method, in the initial design stage of the nozzle, the main geometric parameters of the nozzle can be rapidly obtained, and the feasibility of the overall scheme of the combustion chamber can be evaluated.

The invention discloses a nozzle spray cone angle test system in different oil supply temperature states, which comprises a test measurement device, a control device and a control device, wherein the test measurement device is used for testing spray cone angles of a single spray nozzle and a single spray nozzle with a fuel header pipe at different fuel temperatures; and the test system has a function of performing complementary verification by manually acquiring nozzle spray cone angle data and photographing nozzle spray cone angle data by an optical camera. The nozzle spraying cone angle data obtained by manually operating the complementary verification measurement device and the nozzle spraying cone angle data obtained by shooting the optical camera are subjected to complementary verification, and the problem that the measurement data complementary verification of the nozzle spraying cone angle cannot be realized as only the camera is adopted to shoot the nozzle spraying cone angle is solved.

The application discloses a single-hole rotational flow urea nozzle with geometrically induced vortex line cavitation, which comprises a ball valve, a valve seat, a rotational flow sheet, a flow converging sheet, an outer shell and a hole plate, the valve seat is fixedly connected with the inner wall of the outer shell, an annular protrusion is arranged in the valve seat, a through hole is arranged in the middle of the annular protrusion and is communicated with both ends of the annular protrusion, a sealing ball is arranged at one end of the annular protrusion, and the sealing ball is fixed at one end of the ball valve; the ball valve is movably connected with the inner wall of the outer shell, and a gap for fluid flow is arranged between the ball valve and the outer shell; the other end of the annular protrusion is sequentially provided with the rotational flow sheet, the flow converging sheet and the hole plate, the rotational flow sheet is abutted against the annular protrusion, and a plurality of rotational flow channels which are inclined relative to the axis of the rotational flow sheet are arranged on the rotational flow sheet; and the flow converging sheet is provided with a flow converging channel. The rotational flow sheet provided with the rotational flow channels cooperates with the flow converging sheet, so that the spray cone angle is smaller and the spray is uniformly distributed in the circumferential direction under the working condition of determining the flow of the nozzle.

The utility model discloses a spraying device for a cooling section of an aero-engine combustion chamber testing machine. The spraying device comprises a front flange, a rear flange, a large nozzle water spraying ring unit and a small nozzle water spraying ring unit, the large nozzle water spraying ring unit, the small nozzle water spraying ring unit, the front flange and the rear flange are connected with one another through bolts and then are mounted on the combustion chamber testing machine for detachable integrated mounting; inlets of the large nozzle water spraying ring unit and the small nozzle water spraying ring unit are mutually independent and are used for selecting a cooling scheme according to cooling requirements; the small nozzle water spraying ring unit is located close to an outlet of the combustion chamber and used for achieving the maximum heat exchange function. 10 nozzles are arranged in the large nozzle water spraying ring unit and the small nozzle water spraying ring unit at equal intervals, and the spray cone angle is 30-45 degrees, so that the contact area of spray and hot air is increased while the widest spray coverage area is achieved. According to the invention, the temperature of the tail flow of the combustion chamber tester is effectively reduced, so that test equipment and environment are protected.

The invention relates to the technical field of aerosol particle size control, in particular to a multi-mode self-suction type superfine aerosol emitting device and a control method thereof. Through reasonable arrangement of the composite atomization module, the liquid supply module, the taper angle adjusting module, the particle size detection module and the central control module, full-coverage adaptation from low-viscosity liquid to high-viscosity liquid can be achieved, and the problem that in the prior art, the high-viscosity liquid atomization adaptability is poor is solved; the atomization requirements of different scenes can be met through precise adjustment of the spraying cone angle, the spraying pressure, the spraying speed and the spraying particle size; through the synergistic effect of a composite atomization mechanism and the Laval nozzle and in combination with particle size detection feedback adjustment, the spray particle size of high-viscosity liquid such as diesel oil can be accurately controlled to be a minimum value so as to meet the core requirement of aerosol preparation, and the device is low in manufacturing cost, stable in operation and high in practicability. The problems of blockage, substandard particle size, easiness in ignition and the like in the atomization process of high-viscosity liquid can be effectively solved.

The invention belongs to the technical field of aero-engine fuel nozzle flow tests, and relates to a fuel nozzle spray cone angle measuring and positioning device and method.The spray cone angle measuring and positioning device is of a circular truncated cone structure, a step inner hole is machined in the center of the device, and a conical hole with a conical surface is machined in the bottom of the step inner hole; the spray angle test positioning device comprises a large outer cylinder and a small outer cylinder, and the small outer cylinder is located at the bottom of the large outer cylinder; the small outer cylinder is matched with a tester positioning hole; and the step inner hole is matched with the outer circle of the nozzle of the fuel nozzle. The spray angle measuring and positioning device effectively avoids the problems of high cost, long period and inaccurate positioning caused by manufacturing a special complex positioning device, improves the test efficiency and accuracy of the spray cone angle of the fuel nozzle, and greatly solves the problems of high manufacturing cost and unreliable positioning.

The invention belongs to the technical field of petrochemical engineering, and relates to a low-power acoustic excitation device for pipeline water injection spraying and a regulation and control method. The device comprises a transducer fixed on the outer side of a thin-wall acoustic window on the outer wall of a pipeline close to a nozzle, the transducer drives the thin-wall acoustic window through an acoustic waveguide to generate a vibration radiation surface, a periodic pressure field is coaxially coupled to a near field of the nozzle, and liquid film instability and liquid drop secondary crushing are strengthened on the premise that the flow of a water injection pump and the gas speed in a pipe are not changed. According to the regulation and control method, the volume median particle size, the coverage rate, the spray cone angle and the large drop volume fraction are obtained through the observation window and the online imaging and / or particle size measurement device, and the working frequency and the driving amplitude of acoustic excitation are automatically adjusted by adopting a closed-loop strategy of frequency coarse sweeping-resonance locking-amplitude fine adjustment-hysteresis retention. The controllable sound field is coupled in the near field of the nozzle, so that the instability behavior of the liquid film / liquid column is adjustable, the volume fraction of large liquid drops is reduced, the spray coverage rate is increased, and a quantifiable acceptance index is formed.

The application provides a double-liquid-flow-channel rotary flow cone-shaped nozzle, which comprises two layers of solution channels, a first solution enters a spraying cone-shaped spraying surface from an inner layer through a first flow channel, and a second solution enters a ring-shaped spraying surface from an outer layer through a second flow channel; an inlet of the first flow channel is located at an upper middle part of the nozzle, the first flow channel is connected with a first rotary flow device, a first tangential rotary flow channel is arranged on an inner wall of the first rotary flow device, the first tangential rotary flow channel is distributed on the inner wall of the first rotary flow device, the first rotary flow device is connected with a first rotary flow cavity, and an end of the first rotary flow cavity is connected to a first cone-shaped contraction cavity and then to a first cone-shaped jet hole to realize spraying; a second liquid inlet flow channel is tangentially connected with a circular ring-shaped rotary flow cavity, the circular ring-shaped rotary flow cavity is connected with a second ring-shaped contraction cavity, and the second ring-shaped contraction cavity is connected with a second ring-shaped jet hole.

The invention provides a small-flow fuel nozzle with a variable auxiliary atomized air direction, and belongs to the technical field of gas turbines. The adjustable air cap is internally provided with the tapered flow channel, so that the relative position of the adjustable air cap and the nozzle shell can be changed by rotating the adjustable air cap, the spraying direction of the auxiliary atomizing air is changed, the auxiliary atomizing air is matched with atomizing characteristic parameters such as a spraying cone angle, and the auxiliary atomizing air acts on the spray at a vertical angle all the time. The nozzle comprises a nozzle base and a nozzle shell, a fuel inlet is formed in the top of the nozzle base, a fuel nozzle is formed in the bottom of the nozzle shell, a fuel rectifier and a flow guide column are coaxially installed in the nozzle shell, an air channel inlet is formed in the outer side wall of the nozzle shell, and the air channel inlet communicates with an air channel groove; the air channel groove is communicated to the air collection cavity through an air channel outlet; a fuel oil cavity inlet is formed in the outer side wall of the fuel oil rectifier, and a fuel oil cavity is formed between the outer wall of the fuel oil rectifier and the inner wall of the nozzle shell.

The disclosure provides an atomization state recognition method and device of an atomizing nozzle and a training method of an atomization state recognition model, which can be applied to the technical fields of image processing and computer vision. The atomization state recognition method of the atomizing nozzle comprises: performing droplet edge enhancement processing on an original atomization image generated by the atomizing nozzle in a production process to obtain a target atomization image without imaging noise; performing multi-dimensional asymmetric convolution processing on the target atomization image to obtain multi-dimensional atomization features; performing weight mask processing on the multi-dimensional atomization features based on a spatial attention mechanism to obtain spray profile features with droplet boundary information and spray cone structure information, and performing weight fusion processing on the spray profile features based on a double-head attention mechanism to obtain atomization fusion features; and performing classification processing on the atomization fusion features to obtain an atomization state recognition result of the atomizing nozzle.

The invention discloses a mixed dyeing method and system for a cigarette filter stick, and the method comprises the following steps: raw material preparation and stirring: a stirring device and an ultrasonic device act at the same time to enable the raw materials to be fully mixed to form a uniform mixed system; the mixed system is conveyed into an atomizing nozzle through a high-pressure pump, and atomized spray used for dyeing tows of the cigarette filter sticks is formed according to the spraying parameter set; the dyeing degree of tows is analyzed through the monitoring feedback device, so that the spraying parameter set of atomized spray in dyeing is controlled according to the dyeing degree, the spraying parameter set comprises one or more parameter combinations of the spraying speed, the spraying cone angle, the spraying flow and the spraying pressure, and the dyeing degree comprises the color depth and the uniformity. The stirring device and the ultrasonic device are cooperatively arranged in the glycerol tank, the dispersion uniformity of filter stick additives in glycerol triacetate is improved through the synergistic effect of the stirring device and the ultrasonic device, and automatic control is achieved through the monitoring feedback device.

This utility model discloses a rotatable and adjustable main nozzle mounting base for a cone-shaped spray tube loom. Relating to the field of textile machinery technology, the rotatable and adjustable main nozzle mounting base includes a mounting base with a support plate rotatably connected to its top. Two support plate mechanisms are fixedly connected in a linear array on the top surface of the support plate. A servo motor B is fixedly connected to the outer side of each support plate mechanism. This utility model uses the servo motor B to drive a bevel gear A, which meshes with the bevel gear B on the nozzle support, easily rotating the nozzle support and thus adjusting the angle of the nozzle assembly. Simultaneously, an tilt sensor monitors and provides feedback on angle changes in real time, ensuring the accuracy of the adjustment. This allows for precise control of the airflow direction for weft insertion in actual production, regardless of fabric type or yarn type, effectively solving the problem of unstable weft flight and significantly improving weaving quality.

Operating an engine includes energizing an electrical actuator for a valve in a fuel injector according to a waveform alternating a plurality of on-times with a plurality of dwell times, and outputting a pulsed injection of a gaseous hydrogen fuel from the fuel injector entraining air between pulses of the gaseous hydrogen fuel. Entrainment breaks are produced between the plurality of pulses in a spray cone of the pulsed injection. The gaseous hydrogen fuel and air experience enhanced in-cylinder mixing based upon the air entrainment. Related apparatus is also disclosed.

The invention provides a spiral nozzle, a fire-fighting water mist spray head and a spiral curve design method.The spiral nozzle is composed of a mounting base and a conical spiral body fixedly connected to the mounting base, a water guide channel is formed in the center of the spiral nozzle and is of a conical structure, and the conical spiral body is arranged in the water guide channel; the two spraying cones enable the side surface, close to the water guide channel, of the conical spiral body and the top surface of the conical spiral body to form a set angle; the fire-fighting water mist nozzle comprises a spiral nozzle, a pipe wall part and a fastening part, wherein the pipe wall part, the fastening part and the spiral nozzle are arranged in sequence; a water guide pipeline is arranged at the core parts of the pipe wall part and the fastening part and penetrates through the core parts of the pipe wall part, the fastening part and the spiral nozzle; the tip of the spiral nozzle is arranged away from the fastening portion. The problems that the overlap ratio of spraying ranges of outlets of all circles of a spiral body of a traditional conical fire-fighting water mist nozzle is high, spraying water flow is not uniform, and spraying pressure is low are solved.

The present invention discloses a liquid abrasive flow finishing method for the flow channel of an aircraft engine fuel nozzle. The method comprises the following steps: S1: installing the fuel nozzle in an abrasive flow fixture, disposing an upper flow-uniform grinding core in the inner hole of the fuel nozzle, and disposing a lower flow-uniform grinding core at the lower end of the fuel nozzle; S2: machining the fuel nozzle using a liquid abrasive flow, with a machining time of 40 to 60 seconds and a machining pressure of 7 to 8 MPa; S3: parts cleaning: ultrasonic cleaning for 45 to 50 minutes, with an equipment frequency of 50 to 60 Hz; S4: performance testing of the machined parts. The present invention proposes a liquid abrasive ratio and processing parameters suitable for the fuel nozzle orifice, which significantly improves the surface quality of the nozzle orifice and the performance of the fuel nozzle. The qualified rate of the fuel nozzle spray cone angle reaches 100%, the qualified rate of distribution unevenness increases from 0 to 60%, and the surface finishing consistency is good, effectively improving the atomization effect of the fuel nozzle and ensuring the ignition performance of the fuel nozzle.

The invention belongs to the technical field of gas turbine testing, and particularly relates to a gas turbine model combustion chamber spray measuring device based on high-speed gas curtain protection, which comprises a gas turbine combustion chamber cavity, and a main gas diffusion area is arranged on the inner arc surface of the gas turbine combustion chamber cavity. A spraying core area is arranged on the side, close to the main fuel gas diffusion area, of the inner arc face of the gas wheel combustion chamber cavity, a spraying cone is fixedly installed on the surface of one side of the gas wheel combustion chamber cavity through a flange plate, the outer arc face of the spraying cone is connected with a machine testing suite in a penetrating mode, and an atomization liquid dropping cavity is formed in the connecting area between the machine testing suite and the spraying cone. A guide cover is arranged on the side, away from the atomization liquid dropping cavity, of the inner arc face of the machine measurement suite, detailed information of the particle size of liquid drops in spraying of the combustion chamber can be obtained through particle size distribution of the liquid drops collected at different positions of the overflow cylinder and the spiral flow guide plate, and problems in the combustion process can be found out by analyzing the detailed information. And effective control measures are adopted to ensure safe and stable operation of the combustion chamber.

Method for applying corrosion protection wax to conservation areas of a surface to be conserved, with the following characteristics: a. The discharge is carried out by means of a robot tool (20) attached to a robot arm (12) of a robot (10) with the following features: - the robot tool (20) comprises a nozzle unit (50) which is designed for the selective discharge in one discharge direction of unatomized corrosion protection wax without the supply of compressed air in the form of a thin jet (90) and of corrosion protection wax atomized with compressed air in the form of a spray cone (92), and - the nozzle unit (50) is connected to a supply channel (70) for compressed air and to a supply channel (72) for corrosion protection wax, and - the nozzle unit (50) has an internal nozzle (59) for generating the thin jet (90) of corrosion protection wax, wherein the internal nozzle (59) is supplied via the supply channel (72) for corrosion protection wax, and - the nozzle unit (50) has an external nozzle (53) for generating the spray cone (92) of atomized corrosion protection wax, and - an atomizing chamber (74) is provided between the inner nozzle (59) and the outer nozzle (53), wherein the supply channel (70) for the compressed air opens into the atomizing chamber (74), and - the inner nozzle (59) is aligned in the discharge direction with the outer nozzle (53), so that the corrosion protection wax exiting through the inner nozzle (59) in the form of a jet (90) can be discharged as a jet through the atomization chamber (74) and the outer nozzle (53) when the atomization chamber (74) is not supplied with compressed air, and - the atomizing chamber (74) is designed to atomize the jet exiting the inner nozzle (59) by means of the supplied compressed air when the atomizing chamber (74) is supplied with compressed air, and b. the discharge is carried out for coating at least a first preservation area (18) in the form of an unatomized jet (90) of corrosion protection wax, and c. The discharge is carried out to coat at least a second preservation area (16) in the form of a spray cone (92) with corrosion protection wax atomized by means of compressed air.

Measuring system for checking the functionality of at least one spray head (5) arranged in a container (3), which is designed to spray the spray mist (2) within the container (3) with a defined spray cone, comprising the following components: - a high-frequency measuring device (1), with ◯ a signal generating unit designed to generate a high-frequency signal (S HF ) to generate ◯ an antenna arrangement (11) which is aligned in the direction of the spray cone, so that the high-frequency signal (R HF2 ) can be emitted in the spray mist (2) and a reception signal (R HF1 , R HF2 ) is receivable, and ◯ an evaluation unit designed to use the received signal (R HF1 , R HF2 ) to determine a defined parameter, and to detect spray mist (2), provided that the determined parameter corresponds to a predefined reference value, - a higher-level unit (4) designed to ◯ to control or detect the switching on and off of the spray head (5), ◯ to query the detection of spray mist (2) from the high-frequency measuring device (1), and ◯ to classify the at least one spray head (5) as functional, provided that it is switched on and spray mist (2) is detected.

The present invention proposes a method for discriminating the spray region of liquid fuel and calculating the transient evaporation amount based on ballistic light imaging, which relates to the field of spray measurement and calculation of internal combustion engines; the method for discriminating the spray region of liquid fuel in the present invention mainly includes the division of the liquid column region and the droplet region; the method for calculating the transient evaporation amount of liquid fuel in the present invention mainly includes the calculation of the liquid phase mass in the liquid column region, the calculation of the liquid phase mass in the droplet region and the calculation of the total fuel injection amount, and finally obtains the transient evaporation amount during the liquid fuel spray process; compared with the existing technology, the present invention does not need to set temperature and pressure sensors, nor does it need to obtain the droplet velocity. In addition to obtaining conventional parameters such as spray cone angle and penetration distance, it can also simply and accurately obtain the states of the spray liquid column and droplet region, as well as the instantaneous evaporation amount of the spray.

The invention discloses a method and a device for improving spray characteristic prediction precision of a liquid ammonia direct injection system. The method comprises the steps that on the basis of the spraying mechanism of the liquid ammonia direct injection system, causal relationship analysis is conducted on all operation parameters and all spraying characteristic parameters of the liquid ammonia direct injection system, key operation parameters are determined on the basis of the analysis result, and all the spraying characteristic parameters comprise the spraying penetration distance, the spraying cone angle, the atomization area and the atomization volume; based on the physical characteristics of the liquid ammonia direct injection system, respectively constructing empirical models of the spraying characteristic parameters; based on the causal relationship between the key operation parameter and each spray characteristic parameter, constructing a liquid ammonia spray characteristic prediction model, and embedding each empirical model into a loss function of the prediction model in a physical constraint form; and aiming at each spraying period, respectively outputting liquid ammonia spraying characteristic parameters of the liquid ammonia direct injection system based on the prediction model. According to the invention, the prediction precision of the spray characteristics of the liquid ammonia direct injection system can be improved.

The application discloses a three-stage rotational flow atomization device, which comprises a three-stage rotational flow atomization device for increasing the atomization gas-liquid ratio under the condition of large fuel flow. When the fuel flow is large, a spray cone angle b is formed, the fuel is sprayed into the Venturi tube A upstream of the inclined hole and flows along the wall surface, at this time, part of the fuel flows out into the passage space of the secondary rotational flow assembly through the fuel shunt structure formed by the inclined hole, flows to the outlet of the secondary Venturi tube B under the action of the secondary rotational flow passage inlet centrifugal force, and is subjected to the aerodynamic atomization through the shearing action of the secondary rotational flow passage inlet and the tertiary rotational flow passage inlet, so that the fuel shunt structure on the primary rotational flow assembly is used to increase the atomization gas-liquid ratio of the fuel with large flow rate when the fuel is sprayed out of the nozzle, and the problem that the fuel sprayed out of the nozzle hits the inner wall upstream of the first rotational flow assembly, the atomization of the fuel at the first rotational flow assembly is poor, and the gas-liquid ratio after atomization is small is solved.

A carbon dioxide-neutral biodigester plant includes a biodigester for carbon dioxide-neutral, single-stage or multi-stage production of biogas by fermentation of biomass in a fermentation liquid agitated in presence of elemental hydrogen, hydrogenotrophic and methanogenic archaea, and activated carbon masses, a source of ammonia connected to a first ammonia line, an ammonia cracker to produce hydrogen or a hydrogen-nitrogen mixture by catalytic cracking of ammonia, a first hydrogen line for feeding the produced hydrogen or the hydrogen-nitrogen mixture directly into the biodigester, and a treating device for treating activated coal masses with hydrogen at higher pressure. The treating device includes a pressure line and a treating spray lance. Hydrogen-containing activated coal masses configured as spray cones are injected into the fermentation liquid of the biodigester.

This invention discloses a partially premixed combined nozzle with adjustable fuel adjustment range and its application. The nozzle includes a nozzle body with a dual-path, single-chamber, single-orifice design and an air-path swirl atomizing assembly. The air-path swirl atomizing assembly includes an air annular cavity and air swirl components disposed on the sidewall of the air annular cavity. The air swirl components rotate in the same direction as the main fuel path swirl components and the auxiliary fuel path swirl components. At low fuel supply pressure, the air-path swirl atomizing assembly is activated, and air and fuel rotate in the same direction within the air annular cavity, achieving partial premixing and atomization to form a stable spray cone angle. At high fuel supply pressure, the air path pressure is increased, and the fuel entering the air annular cavity achieves partial premixing under the action of air, increasing the spray cone angle. This invention can meet the requirements of good atomization performance, suitable atomization cone angle, and wide fuel adjustment range under different operating conditions and fuel supply pressures. It can also improve fuel-air premixing, reduce nozzle outlet temperature, and improve combustion efficiency.

Operating an engine includes energizing an electrical actuator for a valve in a fuel injector according to a waveform alternating a plurality of on-times with a plurality of dwell times, and outputting a pulsed injection of a gaseous hydrogen fuel from the fuel injector entraining air between pulses of the gaseous hydrogen fuel. Entrainment breaks are produced between the plurality of pulses in a spray cone of the pulsed injection. The gaseous hydrogen fuel and air experience enhanced in-cylinder mixing based upon the air entrainment. Related apparatus is also disclosed.

The invention provides a device for automatically determining the cone angle of a spray cone, and the device comprises a light source which is used for illuminating the spray cone; the camera is used for acquiring a fog cone image of the spray fog cone; the at least one processor is used for selecting a group of cross sections of the fog cone image to obtain a group of corresponding scattered light intensity distribution along the horizontal direction; for the scattered light intensity distribution of each section in the group of sections, selecting a specified light intensity value as a boundary point of a corresponding single measured section taper angle to obtain a corresponding boundary point set; symmetrical taper angle straight edges are generated based at least in part on the corresponding set of boundary points to automatically determine the taper angle. Methods and computer-readable media for automatically determining a cone angle of a spray cone are also provided. Numerous other aspects are also disclosed.

The application discloses a polyester (PET) warp-weft shuttle woven fabric uniform carding and web laying device, and particularly relates to the technical field of textile machinery, which comprises a first support frame, a carding machine, a second support frame, a web laying machine and a screen conveyor belt. Through a cotton moistening mechanism, micron-level water mist is sprayed to the surface of the web to increase the moisture regain of the PET fiber, reduce the surface resistance, effectively eliminate static electricity, avoid fiber entanglement and defects such as "nep" and "cloud spot", and significantly improve the carding uniformity. Meanwhile, the connecting sleeve of the cotton moistening mechanism is mechanically linked with the fixed rod of the moving mechanism through the first belt, so that the spraying rhythm is kept synchronous with the screen conveying speed, and the continuity and stability of the moistening effect are ensured. In addition, a plurality of water outlet holes are arranged on the surface of the connecting sleeve and are alternately arranged in the circumferential direction in groups, so that the plurality of nozzles work in cycles and alternately, and are not opened at the same time, thereby effectively avoiding the problem that adjacent spraying cones collide and merge into large bubbles or large droplets when the traditional multiple nozzles spray at the same time.