1161 results about "Flux control" patented technology

A flow sensor for sensing fluid flow. The flow sensor includes an exterior, interior, a circuit board, and first and second ports. The first and second ports permit fluid to flow into and out of the interior. A Hall Effect Sensor in the interior detects the number of revolutions of an impeller. An electric coupler interfaces with the flow sensor and a transmitter for communication of the revolutions of the impeller to a controller. The controller determines the rate of fluid flow in a conduit. The controller issues a command signal to a component of a hydraulic system to alter the rate of fluid flow in the conduit.

The invention provides rolling equipment, a current collector, a preparation method of the current collector, a pole piece, a battery and a device. A rolling device comprises a roller mechanism, a flow control mechanism and a power mechanism. The roller mechanism comprises at least two opposite rollers arranged at intervals and a flow control mechanism. The flow control mechanism is used for independently controlling the flow of the cooling medium in each cooling channel; the power mechanism is used for driving at least one roller to rotate. According to the rolling equipment, the roller diameter of the roller can be simply, effectively and flexibly adjusted by controlling the flow, so that the thickness of a rolled membrane material is adjusted, for example, a current collector with a large thickness in a tab area is prepared, the current collector is used for preparing an electrode pole piece, the problem of belt breakage in mass production of the electrode pole piece can be solved, and the production efficiency of the electrode pole piece is improved. And the yield of electrode plate production is improved.

A system configured for cooling electronic devices comprises a pair of opposing, active manifolds that control a flow of cooling liquid through pipes or through an immersion tank past the electronic devices. A controller detects and / or predicts localized hotspots and adjusts flow control devices associated with inlets and outlets of the manifolds to direct proportionately more cooling liquid to the hotspots. The flow control devices can be any combination of variable speed pumps and / or adjustable valves, vents, and / or baffles. Manifolds can be placed on two opposing sides of the devices, on four opposing sides, and / or above and / or below the devices. Temperatures proximate the devices can be measured by separate sensors and / or sensors integral to components of the electronic devices. Hotspots can be predicted by monitoring current flows, power flows, and / or voltages of the electronic devices, and / or inferred from network activity and / or from a workload queue.

The invention provides a control method, device and control equipment of a liquid cooling system, the liquid cooling system and a data center, and relates to the field of liquid cooling heat dissipation. The liquid cooling system comprises a water pump and a valve which are connected in parallel, and the method comprises the steps that a PID adjusting method is adopted, the opening degree of the valve is adjusted so as to reduce the difference between the flow of a liquid cooling loop and the target flow, and the first real-time flow of the liquid cooling loop is monitored; when the first real-time flow is within the preset stable flow interval, sampling the opening degree of the valve within the first preset duration, and determining a first target opening degree according to the opening degree of the valve within the first preset duration; the PID adjusting method is stopped to adjust the opening degree of the valve, and the opening degree of the valve is adjusted to the first target opening degree; and gradually adjusting the opening degree of the valve by adopting a dichotomy until the flow of the liquid cooling loop reaches the target flow. The flow control precision of the liquid cooling loop can be improved, the valve action frequency is reduced, and the service life of the valve is prolonged.

The invention discloses a double-acting pressure reduction diaphragm type pressure flow amplifier in the field of industrial flow control. The double-acting pressure reduction diaphragm type pressure flow amplifier comprises a machine body, a double-diaphragm assembly, a valve core and two air paths. Compressed air of the two air paths is from different sources, the cross sectional areas of the two air paths are adjusted by moving the valve core through the double-diaphragm assembly, the output proportion of the compressed air of the two paths can be adjusted, and therefore the purpose of changing the pressure intensity and the flow is achieved. The pressure is reduced by the following measures: two independent pressure reducing devices are arranged; and the output air is introduced into the double-diaphragm assembly, and a part of pressure intensity of the adjusted air is counteracted. The purpose of adjusting the pressure intensity and the flow of output air is achieved through linear reciprocating motion of the double-diaphragm assembly, various measures are adopted to reduce the pressure intensity of the adjusted air, and the application scene is wider.

A flow control arrangement is provided including a housing seating inlet and outlet conduits is provided. An isolation valve is arranged within the housing and is fluidly coupled to the inlet conduit. A first flow switch with a first shutoff trigger is arranged within the housing and fluidly couples the isolation valve to the outlet conduit. A second flow switch with a second shutoff trigger is arranged outside of the housing and is fluidly separated from the first flow switch. A controller operably connects the first and second flow switches to the isolation valve to close the isolation valve when (a) flow rate of a first fluid traversing the first flow switch is greater than the first shutoff trigger, or (b) flow rate of a second fluid traversing the second flow switch is less than the second shutoff trigger. Semiconductor processing systems and flow control methods are also described.

The invention relates to the field of intelligent water affairs, and discloses a precise flow control system for intelligent water affairs, which comprises the steps of collecting local water flow change data in real time, extracting flow velocity disturbance characteristics and pipe network transient pressure response, and judging whether unexpected disturbance trigger exists or not; constructing a local disturbance label library based on disturbance trigger source features and a historical operation model, and identifying disturbance sources and flow direction tendentiousness by using fuzzy discrimination and variable weight filtering algorithms; according to the pipe section hydraulic characteristics corresponding to the mismatching behavior, the flow of the target pipe section is corrected through a high-resolution electric proportional valve set and a two-way feedback control unit; constructing a cross-section response chain through the intelligent edge control node, and generating a multivariable adjustment gradient according to the multi-period callback simulation data; flow state data and peripheral environment variables before and after the current round of regulation and control intervention are collected, and system model parameters are dynamically corrected through the integrated evolutionary prediction network. The stability of the intelligent water affair system is improved.

According to the Tesla valve structure-imitated micro-flow controller and the preparation method thereof, improvement design is carried out on the basis of an existing Tesla valve structure, the pipe wall of a first branch straight pipe section is designed to be of an arc-shaped structure, the area is increased by 20%-30%, a sawtooth-shaped structure is arranged on the pipe wall, a tiny cavity is additionally formed in a second branch straight pipe section, and the area of the first branch straight pipe section is increased by 20%-30%; the diameter of the structure of the shunting section is modified to be gradually increased, so that the cross sectional area of the shunting section is expanded by 25%-30%, the inner diameter of the branch annular section is reduced, the outer diameter of the branch annular section is expanded, the area of the expanded branch annular section is increased by 25%-35%, and the length of the outlet section is prolonged to be 30%-40% of the original length. The micro-flow controller with the imitated Tesla valve structure prepared by the invention can effectively guide fluid to flow, reduce accumulation of micro-particles in a micro-channel and enhance the impurity particle embolism resistance of a system, so that the stability and reliability of the whole system are improved.

The invention relates to the technical field of heat pump control, and discloses a heat pump unit multi-mode water flow control method and related equipment. The method comprises the steps that the target outlet water temperature of a heat pump unit and a water pump adjusting mode are obtained, and the adjusting mode comprises a flow adjusting mode and a temperature difference adjusting mode; target control parameters are determined according to the temperature interval to which the target outlet water temperature belongs and the adjusting mode, the target water flow in the flow adjusting mode is decreased along with temperature rising, and the target inlet and outlet water temperature difference in the temperature difference adjusting mode is increased along with temperature rising; actual operation parameters are collected, current water flow is collected in the flow adjusting mode, and inlet and outlet water temperature is collected and temperature difference is calculated in the temperature difference adjusting mode; adjusting the water pump output ratio according to the deviation between the actual operation parameter and the target control parameter; and the target outlet water temperature is continuously monitored, and the steps are circularly executed until the machine is stopped. The problem that a single fixed control strategy cannot adapt to different working condition requirements is solved, and the safety and the energy efficiency of the system are both considered.

The invention relates to the technical field of valves, in particular to a high-temperature material flow adjusting device and a control method thereof.The high-temperature material flow adjusting device comprises a device body, a spring hanging bracket fixed to the device body, a water inlet and return system, a control system, a monitoring device and a connecting pipe fixed to a discharging port of the device body. By means of the curved surface fitting design of the valve head and the valve seat, linear adjustment of the high-temperature material flow is achieved, the defects that small opening is sensitive and large opening is slow are thoroughly overcome, the micro-adjustment requirement is accurately met, material level and temperature signals are collected in real time through a monitoring device, closed-loop control is constructed through a PLC control system, and the control precision of the high-temperature material flow is greatly improved. The electric actuating mechanism is automatically driven to adjust the position of the valve rod, manual intervention is not needed, manual judgment errors are avoided, potential safety hazards of operation in a high-temperature scene are eliminated, flow control accuracy and stability are greatly improved, and the problem that a traditional control loop is unstable is solved.

The invention discloses a new energy fracturing truck pump flow control system and method and a fracturing truck, and belongs to the technical field of new energy petroleum equipment.The new energy fracturing truck pump flow control method comprises the steps that pump target flow parameters and an engine mode are received; calculating the target rotating speed of the pump motor, and sending the target rotating speed of the pump motor to a pump main motor controller; the feedback real-time torque value and real-time rotating speed are received and sent to the pump slave motor controller; calculating the total input target power of the pump motor; calculating a generator output target total power based on the pump motor input target total power; determining a generator target speed based on the engine mode and the generator output target total power; based on the generator output target total power, calculating generator input target total power; and calculating a generator target torque based on the generator input target total power and the generator target speed, and sending the generator target torque to a generator controller. According to the invention, pump flow multi-mode control or / and stepless real-time intelligent flow regulation is realized.

The invention relates to a control system and method for continuous and accurate spraying of a glyoxal solution in cellulose ether production. The control system comprises a glyoxal aqueous solution preparation tank; the soft water feeding pipeline, the glyoxal feeding pipeline and the glyoxal mixed solution discharging pipeline are respectively connected with the preparation tank; regulating valves and flowmeters are respectively arranged on the pipelines to respectively form a first flow control loop, a second flow control loop and a third flow control loop; the controller system is connected with the three flow control loops; and the ratio controller is used for automatically calculating and setting a flow set value of the controller system according to the set proportionality coefficient K. Three groups of PID control systems are used for tracking and controlling three PIDs, the ratio devices K and Q3 are set, the ratio devices can automatically set PID set values, track and rectify deviation, corresponding valves are opened for tracking and controlling, inlet and outlet balance is achieved, and the problems that manual calculation is inaccurate in feeding, uneven in proportion, discontinuous in production and unstable in product quality are solved.

A fluid damper having a damper housing with a first and a second fluid volume, and a damping piston located within the damper and separating the first and second fluid volume. The damper piston has a piston fluid pathway formed therethrough and between the first and second fluid volume. The fluid damper includes a fluid accumulator having an accumulator fluid volume. The fluid damper has a first fluid pathway extending between the first fluid volume and the accumulator fluid volume, and the fluid damper has a second fluid pathway extending between the second fluid volume and the accumulator fluid volume. A flow control valve is located in at least one of the first and the second fluid pathways, and the flow control valve has a non-zero threshold value.

A thermal management system for an aircraft engine includes a closed-loop fluid circuit including a coolant supply leg, a first electric power system leg, and a second electric power system leg. A coolant supply system is fluidly coupled to the coolant supply leg for providing a coolant fluid to the coolant supply leg, the first electric power system leg, and the second electric power system leg of the closed-loop fluid circuit. A flow control device fluidly couples the coolant supply system via the coolant supply leg, to the first electric power system leg, and to the second electric power system leg. A first heat source is in thermal communication with the coolant fluid via the first electric power system leg, and a second heat source is in thermal communication with the coolant fluid via the second electric power system leg.

Generally described, one or more aspects of the present disclosure relate to methods, systems, and devices related to a powder dispensing system, including a pair of calender rolls, a first conical hopper and a second conical hopper positioned above the pair of calender rolls, each hopper having a first temperature controlled fluidized section, a first flow control system in fluidic connection with the first temperature controlled fluidized section, and a second flow control system in fluidic connection with the second temperature controlled fluidized section, a vertical linear actuator configured to adjust a distance between the first conical hopper, the second conical hopper and the pair of calender rolls, and a horizontal linear actuator positioned between the first conical hopper and the second conical hopper.

The invention relates to the technical field of multi-cylinder synchronous control, in particular to an electro-hydraulic-mechanical dual-redundancy high-precision execution method and system for multi-cylinder synchronous control. The method comprises the following steps: acquiring design data of the multi-cylinder hydraulic jacking equipment, and constructing a multi-cylinder operation simulation model based on a geometric structure and the design data; estimating the dynamic load overrun condition of the gate, detecting the distortion increase condition of the gate structure, and monitoring the increase trend of the gate to overcome the resistance; the multi-cylinder operation simulation model is analyzed according to the gate overcome resistance increasing condition, the local cylinder mechanical degradation increasing trend is determined, and hydraulic oil flow control distortion data is detected according to the local cylinder mechanical degradation increasing trend; detecting multi-cylinder operation stroke deviation according to local cylinder body mechanical degradation and hydraulic oil flow distortion conditions, identifying a multi-cylinder synchronization abnormal trend, and performing optimization processing to obtain multi-cylinder synchronization optimization data; through multi-cylinder synchronous control, multi-cylinder synchronous control is more efficient.

A multi-mode control module for selectively controlling a flow of one or more fluids through a thermal management system is disclosed. The control module includes a fluid valve system in fluid communication with one or more fluid manifolds. The fluid valve system includes at least one fluid valve assembly disposed in a housing defining a plurality of flow paths. Each fluid valve assembly includes a plurality of flow control members in stacked relationship moveably disposed and selectively positionable within the housing to achieve various operating modes of the control module, and thereby, the thermal management system.

The invention discloses a smooth transition method and system for sensorless field directional control, and relates to the technical field of permanent magnet synchronous motor sensorless control. According to the method, an error between an I-f starting virtual synchronous reference coordinate system and a sensorless observer estimation coordinate system is eliminated through a dual-core mechanism of a robust transition strategy and a position error compensation strategy, and then rotor position deviation caused by non-ideal factors is corrected through an exclusive compensation module; the system constructs a multi-stage switching control framework based on the method, and seamless transition from I-f open-loop starting to sensorless FOC closed-loop control is achieved. Complex parameter adjustment is not needed, transition is fast and stable, torque magnetic flux control precision can be optimized, copper loss is reduced, system efficiency and robustness are improved, and the method is suitable for industrial driving scenes such as air conditioner compressors.

The invention discloses a rotary direct-drive type flow and pressure composite servo valve which comprises a valve sleeve and a valve element rotationally arranged in the valve sleeve, and the valve element is connected with a driving mechanism. A working oil hole communicated with the actuating cylinder is formed in the cylinder wall of the valve sleeve; pressure control holes and flow control grooves are formed in the cylindrical face of the valve element in the circumferential direction at intervals. By driving the valve element to rotate, the working oil hole and the pressure control hole can be selectively overlapped to achieve pressure control or the working oil hole and the flow control groove can be selectively overlapped to achieve flow control, and therefore switching between a pressure control mode and a flow control mode is achieved on the same servo valve. Pressure and flow control functions are integrated, a rotary direct-drive structure is adopted, tiny structures such as a spring tube are omitted, and the problems of abnormal noise such as squeal and high-frequency vibration are avoided.

The utility model relates to the technical field of valves, in particular to a water flow regulating valve which comprises a valve body, an inner cavity is formed in the valve body, a water outlet pipe communicated with the inner cavity of the valve body is arranged on the valve body, and a first through hole and a second through hole are formed in the top surface and the bottom surface of the valve body respectively in a penetrating mode. The first through hole and the second through hole are coaxially formed, a water inlet pipe is coaxially fixed at the second through hole, the inner end of the water inlet pipe is sealed, a plurality of water outlet holes are formed in the water inlet pipe in the inner cavity in a penetrating mode in the circumferential direction, a movable pipe is coaxially fixed in the first through hole, and the inner end of the movable pipe extends into the inner cavity and is arranged on the water inlet pipe in a sleeving mode; the movable pipe is in transmission connection with a driving mechanism. By controlling the up-and-down moving distance of the movable pipe, the number of the water outlet holes in the water inlet pipe shielded by the movable pipe can be controlled, so that the water outlet amount of the water inlet pipe through the water outlet holes is controlled, the water outlet flow of the water outlet pipe is adjusted, and more accurate flow control is achieved.

This application relates to a solenoid valve flow control method, system, terminal, and storage medium, and pertains to the technical field of refrigeration flow control. The method includes acquiring the current ambient temperature and a target temperature range; determining whether the current ambient temperature is within the target temperature range; if so, continuing to acquire the current ambient temperature for cyclical judgment; if not, acquiring the opening degree and temperature data of the preceding solenoid valve; analyzing the opening degree and temperature data of the preceding solenoid valve to determine a linear refrigeration relationship; and analyzing the linear refrigeration relationship, the current ambient temperature, and the target temperature range to control the opening degree of a preset solenoid valve. This application improves the accuracy of solenoid valve flow control.

A construction machine is capable of returning the posture of an earth removal plate (blade) from a rocking posture to a predetermined normal posture. A stay is mounted on the construction machine body to move in upward and downward directions. The earth removal plate is mounted on the distal end portion of the stay, and is rockably movable in forward and rearward directions by an angle cylinder controlled by a flow of hydraulic fluid in response to receiving an instruction about rocking the earth removal plate. A normalization switch gives an instruction to set the posture of the earth removal plate to a predetermined normal posture from the rocking posture. The posture of the earth removal plate is set to the predetermined normal posture from the rocking posture in response to the instruction from the normalization switch.

A flow rate control valve includes a valve seat portion, a valve member, a driving portion, and a support member supporting the valve member via a diaphragm portion. The valve member has an opposite face opposite from a valve seat face with respect to a seat face and a circumferential face connecting together the seat face and the opposite face. The diaphragm portion is connected to the circumferential face of the valve member at a position closer to the seat face than to the opposite face. The support member has a first face on the same side as the opposite face with respect to a membrane face of the diaphragm portion and a second face closer to the valve seat portion than the first face. When the diaphragm portion is not deformed, the opposite face and the first face are on the same plane.

A flow control valve, a method and a well system. The flow control valve, in one aspect, includes a sliding sleeve disposed in a central bore of a housing, the sliding sleeve configured to move between a first state covering one or more flow trim ports and engaging a housing seal and second state disengaging from the housing and exposing at least a portion of the one or more flow trim ports. In accordance with one aspect, the flow control valve further includes a position sensor coupled with the sliding sleeve, the position sensor configured to determine a change in a resistance value as the sliding sleeve moves between the first state and the second state, the change in resistance value indicative of a position of the sliding sleeve in relation to the first state and the second state.

A flow control valve (2) is proposed, which is penetrated by a longitudinal axis (A), comprising a valve body (4) with an inlet opening (6) and an outlet opening (8) on opposite sides of the valve body (4) and a fluid channel (10) which fluidically connects the inlet opening (6) to the outlet opening (8), and an electromagnet (100) which is penetrated by the fluid channel (10), wherein the flow control valve (2) comprises a sealing element (12) which is adjustable between a closed position (S1) closing the fluid channel (10) and an open position releasing the fluid channel (10).

Mass flow control (MFC) devices capable of reporting inlet pressure and methods of reporting inlet pressure are provided. A mass flow controller (MFC) includes a chamber configured to receive a fluid, an upstream valve disposed upstream of the chamber, and a downstream control valve disposed downstream of the chamber. The MFC further includes a pressure sensor that detects fluid pressure in the chamber. The MFC further includes a controller configured to control actuation of the upstream valve. The controller is configured to toggle between two modes of reporting a measured inlet pressure. In a first mode, the controller reports a measured inlet pressure based on a reading from the pressure sensor and storing the reading to a buffer when the upstream valve is open. In a second mode, the controller reports the measured inlet pressure based on the reading stored to the buffer when the upstream valve is closed.

A multi-way valve adapted to control a flow of fluid to different thermal fluid circuits includes a valve housing, a valve flow controller, and sealing systems. The valve flow controller is arranged in the valve housing to control flow through the valve housing. Each scaling system is configured to seal between the valve housing and one of the valve rotors included in the valve flow controller.

This construction machine is provided with: a flow rate control valve as a hydraulic device that adjusts the flow rate supplied to a hydraulic cylinder that drives a work device; and a control device that controls the hydraulic cylinder so as to satisfy the condition that the work tool moves without exceeding the target surface. The control device calculates a target speed of the hydraulic cylinder at which the work tool satisfies the condition on the basis of information on the target surface and detection information from a detection device that detects the orientation of the work device, and controls the work tool when the target value of the hydraulic device corresponding to the calculated target speed is less than a lower limit value at which the accuracy of flow control can be ensured. On the basis of the limited speed of the hydraulic cylinder obtained from the lower limit value, a target speed of the hydraulic cylinder at which the work tool satisfies the condition is re-calculated, and the hydraulic device is controlled by a target value corresponding to the re-calculated target speed.

This invention provides an electric valve and a refrigeration cycle system. The electric valve has a two-stage flow control domain. The main valve port of the main valve seat is fully closed by the main valve core, and the refrigerant flow is controlled in the small flow control domain by the throttling section formed between the auxiliary valve port and the needle valve formed by the main valve core. For this electric valve, vibration of the main valve core in the small flow control domain is prevented, and the controllability in the small flow domain is improved. The main valve port (13a) is fully closed by the main valve core (3), and fluid flows through the throttling section (gap) between the needle part (42) of the needle valve (4) and the auxiliary valve port (33a), thus forming a small flow control domain. In the small flow control domain, the conical part (41a) (abutment part) of the needle valve (4) (auxiliary valve core) abuts against the stepped part (3a) (abutment part) of the main valve core (3). By abutting the tapered part (41a) and the stepped part (3a), the needle valve (4) pushes the main valve core (3) to the side of the main valve seat (13).