78results about "Viscosity control" patented technology

The invention relates to a method and system for controlling viscosity of a hydraulic fluid. The viscosity of a hydraulic fluid is usually very much dependent on temperature. By using existing throttles which generate a pressure drop, the hydraulic fluid can be heated by creating a power drain in these existing throttles through a controlled increase of the pressure through them. By controlled heating, the viscosity of a hydraulic fluid can be controlled. According to the invention, the existing throttles are preferably cavity-preventing openings in valves.

A method and system for treating fly ash with a treating fluid by evenly dispersing a treating fluid into a flowing stream of fly ash. By dispersing the treating fluid into the fly ash as the fly ash is flowing, the method takes advantage of natural mixing and particle motion that occurs during flow of the bulk solid. The application of treating fluid is advantageously controlled by an automated controller that has inputs and outputs that allow the controller to adjust flow rate of the treating fluid in correspondence with a measured flow rate of the fly ash.

The present invention provides a new method and apparatus for receiving signals containing information about a plurality of velocity profiles of a flow in a pipe and about a pressure gradient of the flow over a length of the pipe; and determining information about an injection of a chemical into the flow in the pipe based at least partly on the information contained in the signals.

The invention relates to an application device (V) for applying an application agent to a component, preferably for applying a coat to a motor-vehicle body component. The application device (V) comprises a printhead (100) for preferably serially and/or continuously applying the application agent, wherein the printhead (100) has: a nozzle plate (1), at least one nozzle (2) in the nozzle plate (1) for dispensing the application agent, at least one valve element (9) movable relative to the nozzle plate (1) for controlling the dispensing of the application agent by means of the at least one nozzle(2), wherein the at least one movable valve element (9) closes the at least one nozzle (2) in a closed position and opens the at least one nozzle in an open position, and at least one drive (A) for moving the at least one valve element (9). The application device (V) is characterized in particular in that the application device comprises at least one temperature-control device (T1-T8) for reducing heating of the at least one drive (A) during the application of the application agent.

The present invention provides systems and methods for providing colorant to a colorant cup apparatus that is adjacent to a pad printing cliché. The fluid colorant is fed from a colorant container through a feed conduit to the cup and an inline viscometer external to the colorant container measures the viscosity of colorant within the feed conduit. A control mechanism can dispense colorant solvent into the colorant container based upon a viscosity measurement performed by the inline viscometer. The disclosed systems, colorant cups and methods are useful in the preparation of tinted contact lenses.

The invention designs a polyester melt viscosity control system, mainly including a vibration-typed viscosity meter, a signal input unit, a control unit, a signal output unit and an actuator; the actuator is arranged on a polyester pipe; the vibration-typed viscosity meter is connected with the signal of the signal input unit; the signal output unit is connected with the actuator signal; a pressure detector is arranged on the polyester pipe; and the pressure detector and the vibration-typed viscosity meter are connected with a viscosity revising unit by signal. The control method of the control system adopts the viscosity signal of the melt in the polyester pipe which is detected by the vibration-typed viscosity meter and the pressure signal which is detected by the pressure detector as the detection signals, corrects the viscosity signal which is detected by the vibration-typed viscosity meter by making use of the relationship between the pressure and the viscosity in the polyester pipe, and uses the revised viscosity signal as a control signal to control the system; and the correction is carried out by a formula V=(1+K*((P-P0)/P0)) V (detection viscosity). The invention effectively eliminates the influence of the pressure fluctuation in the polyester pipe on the measurement of a viscometer.

The invention discloses a compound fertilizer grain volume control system comprising a feeding mechanism, a mixing trough, a rotary spray head, a slurry conduit, a rotary spray head motor and a control system. Compound fertilizer slurry in the mixing trough enters the rotary spray head driven by the rotary spray head motor for granulation through the slurry conduit. The control system comprises a temperature sensor device, a temperature sensor processing device, a signal amplifying device, a rotating speed controller and a feeding ratio controller, wherein the temperature sensor device outputs the detected temperature value of the compound fertilizer slurry in a mode of detecting current; the temperature sensor processing device receives the detecting current and forms a detecting current signal; and a control signal is formed through the signal amplifying device and output to the rotating speed controller and the feeding ratio controller so as to control the rotating speed of the spray head motor and the feeding ratio of the compound fertilizer slurry. The invention provides a compound fertilizer production system which can produce fertilizers with uniform volume of grains and is beneficial to improving the fertilization effect.

The invention relates to a novel method for manual viscosity control. The novel method for the manual viscosity control is used for guiding melt viscosity control when production conditions are changed. The novel method for the manual viscosity control concretely comprises the following concrete control steps that abnormal production conditions are found; melt pressure in a pipeline is measured through a spinning pipeline pressure measurement system; the pressure difference of a filter and the rotational speed of a boost pump before 40 minutes are deduced; melt viscosity drop is calculated in a conversion mode through a pressure conversion formula I and a modification formula II of an actual viscosity change; the melt viscosity drop which is calculated in the conversion mode is used as production instructions to adjust the vacuum degree and other process conditions; manual control over melt viscosity is achieved. The novel method for the manual viscosity control has the advantages that the melt viscosity control is achieved by the adoption of the control method; the melt pressure change is measured on line, the melt viscosity drop is calculated in the conversion mode through the empirical formulas, and therefore the control over the melt viscosity is finally achieved; in this way, the novel method further has the advantages that equipment investment costs are low, installation is simple, and operation is convenient.

The present invention relates to a method of controlling, by open-loop or closed-loop control, the processing of a liquid food product, comprising the steps of providing data that are obtained from mathematical modeling of the dependency of the viscosity of liquid food products on the shear rate, measuring the viscosity of the liquid food product to be processed at a predetermined shear rate at a measuring point, and controlling, by open-loop or closed-loop control, the processing of the liquid food product at a working device downstream of the measuring point in response to the viscosity measured at the measuring point and on the basis of the provided data.

The invention relates to a transmitter for consistency measuring of pulp suspensions at first hand, comprising a measuring body (1), shaped such as a blade, suspended in a vibration-producing apparatus. The measuring body (1) shaped such as a blade (I' ) shows wave-shaped side surfaces (9, 10) in its transverse direction and is vibratable in a frequency of oscillation between 20-80 Hz and with a predetermined amplitude of +/- 2-8 mm, that provides a combination of both shearing force measurement and a measurement of the resistance of conveyance of liquid through a fibre netting.

The invention discloses a method and test device for mechanically controlling the object surface/interface adhesion strength. According to the method in the invention, on the premise of being independent of an object surface micro-structure, two object surfaces having the adhesion effect are contacted together, so that a contact pair is formed; two objects of the contact pair are stimulated to perform relative mechanical vibration; therefore, the contact area of the contact pair changes over time; and the object surface/interface adhesion strength is controlled by changing the excitation frequency or the amplitude. The method is simple to implement and high in controllability; the method is independent of the surface/interface micro-structure, and has universality; the adhesion strength control effect is obvious; and the fact that the contact interface adhesion strength is greatly increased or decreased can be realized.

The invention relates to an automatic glue viscosity adjusting system which comprises a viscosity detecting device, a control device and a diluent supplementing device. The viscosity detecting devicecomprises a sampling pipe extending downwards into glue in a sampling vessel, and a sampling rod component is arranged in the sampling pipe. The sampling rod component comprises a sampling rod, wherein the lower end of the sampling rod is provided with a sampling piston which is connected with the inner side of an opening in the lower end of the sampling pipe in a sealed sliding mode, the upper end, extending out of the upper end of the sampling pipe, of the sampling rod is provided with a signal triggering plate, and the signal triggering plate is in transmission connection with a sampling air cylinder. The control device comprises a PLC, a lower signal sensor and an upper signal sensor, wherein the lower signal sensor is arranged below the upper signal sensor. The automatic glue viscosity adjusting system adopts the scheme of automatically adding the diluent according to the glue viscosity measured in real time, and the automatic glue viscosity adjusting system has the advantages ofstable glue viscosity, stable product performance and high product quality.