897 results about "Fluid pressure" patented technology

An auto-occlusion safety device is provided for use in preventing rupture of infusion components during rapid infusion procedures. An occlusion valve is disclosed having a threshold pressure that is less than a rupture tolerance of the infusion system components. As the fluid pressure of the infusion system increases beyond the threshold pressure of the occlusion valve, the occlusion valve is automatically activated thereby occluding fluid flow upstream from a vulnerable infusion component. An accumulator is further disclosed for use in combination with the safety device to compensate for time delays in full activation of the occlusion valve.

A door seal for an elevator car includes a first tube and a second tube made of an elastically deformable sealing material; the door seal adapted to be mounted on a car wall and / or car door of the elevator car such that the first and second tubes, when the door closes a door opening in the car wall, lie opposite one another within a door gap in a bridging direction and run at least partially around the door opening. The first tube has a pressure connection and can be deformed, by applying fluid pressure, between an initial shape and a final shape that is enlarged in the bridging direction compared to the initial shape. The second tube has at least one pressure equalization opening that enables pressure equalization between an interior and an environment of the second tube when the second tube is compressed.

The invention belongs to the technical field of flow measurement and control, and discloses a laminar flow mass flow control system and method based on feed-forward compensation and cascade control. In the system, a laminar flow element is provided with a low-voltage side detection port and a high-voltage side detection port; the low-pressure side detection port is connected with the low-pressure ends of the pressure sensor and the differential pressure sensor, and the high-pressure side detection port is connected with the high-pressure end of the differential pressure sensor; the laminar flow element is connected with the regulating valve; the output end of the pressure sensor is connected with the input end of the feedforward compensation module; the output end of the A / D converter is connected with the input end of the main controller and the input end of the auxiliary controller; the output end of the main controller is connected with the input end of the auxiliary controller. The output end of the feed-forward compensation module is connected with the control end of the regulating valve; the output end of the auxiliary controller is connected with the control end of the adjusting valve through the D / A converter. The feed-forward compensation and cascade control technology is adopted, the pressure feed-forward compensation module and the differential pressure pair control loop are additionally arranged, and the problem that the flow precision of a control system is not accurate due to sudden change of fluid pressure is solved.

The invention discloses a shaft scaling prediction method and system based on a transfer function and machine learning. The method comprises the steps that scaling prediction basic parameters such as fluid pressure, temperature, flow velocity and ion concentration in an oil and gas shaft are obtained and imported into an oil and gas shaft scaling dynamic analysis platform; calling a seepage coupling transfer function scaling prediction model to process seepage related parameters, and establishing a correlation between a fluid seepage state and a scaling initial trend; starting a dynamic transfer function out-of-bag scaling algorithm to dynamically iterate different depth parameters, and outputting a preliminary scaling amount; correcting a preliminary result through a chemical thermodynamic transfer function correction algorithm in combination with parameters such as temperature; and a machine learning model is adopted to train a corrected result and a shaft position parameter, a mapping model is established, a dynamic scaling prediction curve is output, and the platform carries out visualization processing on the curve. The system is matched with the method to realize parameter acquisition, processing, calculation, correction, modeling and display, and the scaling prediction accuracy and the dynamic adaptability are improved.

The invention discloses a CO2 directional fracturing target layer crack propagation simulation control method based on flow regulation and control. The method comprises the steps that a plurality of experimental coal samples are manufactured, and drill holes are formed; the fracturing pump inputs CO2 with set flow into the coal sample through the CO2 injection pipeline; the high-frequency dynamic pressure sensor collects fluid pressure data in the coal sample crack; the acoustic emission sensor monitors and obtains the crack initiation moment and crack initiation pressure of the coal sample; the method comprises the following steps: carrying out cracking and crack width monitoring on a coal sample, calculating a theoretical value of crack initiation pressure and a theoretical value of CO2 injection flow of the coal sample, injecting supercritical CO2 fluid into the coal sample, obtaining a first-stage correction coefficient and a second-stage correction coefficient of the CO2 injection flow, and calculating a corrected CO2 injection flow value. According to the method, under the multi-physical-field coupling environment, the crack initiation pressure of the coal body can be accurately measured and calculated, the correlation between the CO2 injection flow and the crack width of the coal body is established, and the CO2 injection flow better meets the actual requirements of field operation through a CO2 injection flow grading correction mechanism.

A method for evaluating contribution of each component to shale oil reservoir resistivity at high temperature and high pressure is applied to the field of oil exploration and development. The method comprises the following steps: (1) analyzing the volume percentage of each clay mineral, the pore water content and the mineralization degree of the shale oil reservoir pressure-maintaining closed core; (2) when the fluid pressure is greater than 23MPa, measuring the resistivity of the pressure-maintaining closed rock core at each temperature point; (3) carrying out water balance treatment on pure clay minerals, namely kaolinite, montmorillonite, illite and chlorite, and measuring the resistivity at each temperature point when the fluid pressure is greater than 23MPa; (4) when the fluid pressure is greater than 23MPa, measuring the resistivity of each temperature point of the solution consistent with the mineralization degree of the pore water; and (5) constructing a resistivity evaluation model, and evaluating the contribution of each component to the resistivity of the shale oil reservoir under the condition of high temperature pressure.

Methods and systems are provided for controlling braking to avoid groan noise in a braking system. The system has a brake actuator configured to apply a friction force to a moving member, a conduit system coupled with the brake actuator, an inlet valve in the conduit system configured to control fluid pressure delivered to the brake actuator, and an outlet valve in the conduit system configured to control fluid pressure released from the brake actuator. The system includes a controller to monitor for an upper target pressure condition in the braking system, wherein the upper target pressure condition is associated with a noise zone; and operate, when the upper target pressure is detected and in a noise zone avoidance mode, the inlet valve and the outlet valve to avoid brake pressures that generate a brake noise from the friction force.

The invention relates to a gas tunnel self-rotating type asymmetric water jet slotting device which comprises a slotting device body, a middle body, a valve element, a front end and a rear end, the front end and the rear end are arranged at the front end and the rear end of the slotting device body respectively, the middle body is rotationally arranged in the slotting device body, the valve element is slidably arranged in the middle body, and the valve element is arranged in the middle body. The rear end head is communicated with the interior of the middle body; a lateral hole is formed in the middle rear part of the middle body, a nozzle is mounted on the lateral hole, and a main body discontinuous hole is formed in the slotting device main body. The invention further provides a using method of the device. On the premise that the drill rod stops rotating, the rotary cut-off type high-pressure pulse water jet is jetted outwards only by changing the pressure and flow of input fluid, the coal rock breaking capacity is high, the structure is simple, operation is convenient, and economical and practical effects are achieved.

The invention relates to the technical field of data processing, in particular to an elastic frame optimization design method and system based on the finite element theory, and the method comprises the steps: constructing a nonlinear finite element model of an elastic frame, and for each node, determining the sealing reliability of the node based on the normal contact stress value, fluid pressure value and displacement vector of the node; for each unit, determining a fluid permeation trend factor of the unit based on the sealing reliability of the nodes in the unit, remodeling a material relative density iterative updating formula of the optimization criterion method by using the fluid permeation trend factor, updating the material relative density of each unit, generating an optimal topological configuration, and carrying out the optimal topological configuration; therefore, the optimal design of the elastic frame is completed. According to the method, the problem of high-pressure leakage caused by neglecting microscopic sealing in traditional topological optimization is solved, and synchronous optimization of the structural rigidity and the sealing performance under the ultrahigh-pressure working condition is achieved.

This invention relates to a fluid sealing device comprising a sealing member comprising a first surface and an opposite second surface. A first region of the first surface for forming a first seal about an aperture of a process component containing a fluid, and an inner region of the first surface to be exposed to the fluid via the process component aperture. A restraining member providing a support surface facing the second surface, a perimeter portion of the restraining member interfacing with a first region of the second surface, the first regions of the first and second surfaces corresponding with a first region of the sealing member. An inner region of the second surface spaced from the support surface to form a cavity between the inner region of the second surface and the supporting surface at least in an unpressurised condition. The inner regions of the first and second surfaces corresponding with an inner region of the sealing member, the inner region of the sealing member moveable towards and away from the support surface under action of a pressure of the fluid on the inner region of the first surface to provide an indication of the pressure.

The invention relates to the technical field of geotechnical engineering investigation, and particularly discloses a depth-adjustable sampling method for geotechnical investigation, which comprises the following steps: acquiring pore fluid pressure data in real time through a sensor group arranged at the front end of a sampler; based on the data, dynamically predicting an evolution trend of a pressure field in front of the sampler and generating a prediction result containing a pressure abnormal state and spatio-temporal information thereof; performing grading processing on the prediction result to obtain a pressure risk grade; carrying out collaborative decision making on the grade, the soil body sensitivity and the target sampling quality to generate a dynamic control strategy; and finally, the injection action of the sampler is adjusted in real time according to the strategy, the injection action comprises executing micro-amplitude withdrawing and re-injection circulation or gradual deceleration operation, and the control effect is ensured through closed-loop optimization. The method can actively inhibit the water attack and cavitation effect, and improves the quality and reliability of obtaining an undisturbed sample in a complex stratum.

Described herein are examples of pressure sensors, and methods to assemble pressure sensors. In some examples, a pressure sensor uses gauges attached to a sensor tube of a sensor body to detect a pressure of fluid flowing within the sensor tube. In some examples, the sensor tube helps to isolate the gauges from some of the stresses that the rest of the sensor body may experience due to intense fluid pressures. In some examples, the sensor body has a one piece design that increases durability. In some examples, a sensor adapter may be attached to the sensor body and / or hardened by one or more techniques to reduce the chance of fluid leakage and / or further increase durability. The gauges, the sensor body, and / or the sensor adapter can be enclosed within a sensor cover, and encased within a potting material, to protect and / or insulate the components.

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.

The utility model relates to a normally open type electromagnetic valve, relate to electromagnetic valve field, the valve body subassembly has the valve cavity in, the valve core sliding sets up in the valve cavity of valve body subassembly, the valve core has the valve core flow channel in, the valve core flow channel is linked with valve cavity and fluid export, the spring is installed in the valve cavity, the one end of spring and the one end of valve body subassembly abuts, its other end and the valve core abut, the coil fixed cover sets up on valve body subassembly, the coil is electrified, the valve core moves to sealed fluid import under the electromagnetic force, or the coil is de-energized, the valve core moves to open fluid import under the spring elasticity force. In the scheme spring force and fluid pressure are set up in the same direction, the valve core is in stable normally open state when working, avoids the abnormal closing of valve, drives the valve core to close with the electromagnetic force of coil, and control loop is simple, and response speed is fast. The electromagnetic valve design principle and structure are simple, and the number of parts is few, and the action performance and sealing performance are stable and reliable, and the weight is light, and the volume is small.

To improve the durability of the magnets. [Solution] The hydraulic cylinder 100 comprises a cylinder tube 10, a piston rod 20, a piston 30 connected to the piston rod 20 and slidably housed within the cylinder tube 10, a magnet 40 provided within the cylinder tube 10 and reciprocating together with the piston rod 20, and a magnetic sensor 50 that detects the stroke of the piston rod 20 and the piston 30 by the magnetic field of the magnet 40. The piston rod 20 has a piston fixing portion 22 to which the piston 30 is connected, with a male thread 22a formed on its outer circumference, and a tip portion 23 formed to be smaller in diameter than the piston fixing portion 22. The piston 30 is attached to the piston fixing portion 22 by the female thread 35a of a nut portion 35 formed on or separately from the piston 30 screwing into the male thread of the piston fixing portion 22, and the magnet 40 is attached to the tip portion 23 of the piston rod 20.

In a fuel supply system that supplies gaseous fuel to the engine of a vehicle, the fluid pressure of the discharged gaseous fuel can be adjusted by electronic control, and the fluid pressure of the gaseous fuel can be safely released in the event of a malfunction such as a power supply failure. [Solution] In a fuel supply system 100 that supplies gas fuel to an engine 6, the system includes an electronically controlled regulator 3 that reduces the introduced gas fuel to a set pressure and discharges it, a pressure sensor 7 that detects the fluid pressure of the gas fuel after reduction, and a normally open electromagnetic relief valve 8 provided downstream of the pressure regulating valve of the electronically controlled regulator 3. The electromagnetic relief valve 8 opens when the fluid pressure detected by the pressure sensor 7 reaches a pressure threshold or when the system is not energized, releasing the gas fuel outside the system.

The present application relates to a kind of inertial energy storage methods.A kind of inertial energy storage method uses inertial energy storage device, with the cavity of fluid being contained, kinetic energy recovery device and the transmission member driven by the pressure of fluid in cavity, the method includes: fluid in cavity is accelerated;Fluid in cavity is applied deceleration resistance by kinetic energy recovery device, so that fluid in cavity is decelerated;During the deceleration of fluid in cavity, the kinetic energy of fluid deceleration is recovered by kinetic energy recovery device;Wherein, using the acceleration effect of fluid in cavity, the pressure of fluid in cavity is increased from first pressure to second pressure according to the velocity variation rate and movement state of fluid;Before the step of kinetic energy recovery device recovery kinetic energy ends, additionally by transmission member, the fluid pressure energy generated by fluid under the action of second pressure is obtained, wherein, first pressure is less than second pressure.

A fluid valve assembly for a seat comprising a fluid bladder, the fluid valve assembly comprising: a valve housing at least partially defining a first fluid inlet, a first fluid outlet, and a first exhaust outlet; a diaphragm disposed at least partially in the valve housing and configured to flex between a first position and a second position according to a first fluid pressure difference between the first fluid inlet and the first fluid outlet.

The invention relates to the technical field of crossing of mechanical engineering and thermodynamics, in particular to novel intermittent piston equipment. The device is characterized by comprising a gas-liquid cylinder system, a piston system, a feeding system, a discharging system and a cooling system, wherein the gas-liquid cylinder system comprises a plurality of partition plates with holes and can further comprise a plurality of monitoring control assemblies, and the piston system comprises a plurality of piston push plates with holes and a plurality of piston driving mechanisms and can further comprise a plurality of monitoring control assemblies. The cooling system comprises a plurality of thermal contact modules, a plurality of heat transfer modules and a plurality of heat dissipation terminals, and can further comprise a plurality of monitoring control assemblies. A perforated partition plate, a perforated piston push plate and a monitoring control assembly are additionally arranged in an existing piston equipment technology, meanwhile, piston pushing and cooling system cooling integrated intermittent operation is adopted, the position of a piston and fluid pressure are monitored in real time, a driving signal is dynamically adjusted, and the working efficiency is improved. Efficient conversion between mechanical energy and gas pressure energy, hydraulic energy or fluid heat energy and precise control over the fluid temperature are achieved, the compression, expansion and mass transfer and heat transfer efficiency of fluid in equipment is greatly improved, the technical application scene is wide, and the technical application value is high.

The invention relates to the technical field of engineering machinery, in particular to an electric cabinet cracking fault diagnosis method, device and equipment and engineering machine.The method comprises the steps that a fluid CFD simulation model corresponding to a cooling water channel in an electric cabinet is built; according to the fluid CFD simulation model, fluid pressure information corresponding to the wall face of the cooling water channel is obtained; based on a finite element FEM technology, establishing an electric cabinet structure simulation model with geometric features corresponding to the welding root notch at the welding root position; coupling the fluid pressure information corresponding to the wall surface of the cooling water channel to the wall surface of a fluid domain cavity corresponding to the electric cabinet structure simulation model to obtain a structure fluid coupling analysis model; and performing deduction calculation on stress information corresponding to the weld root notch in the structural fluid coupling analysis model based on the weld fatigue curve so as to diagnose the cracking fault of the weld root position. According to the invention, accurate diagnosis of the welding root cracking fault of the electric control box can be realized, and a reliable basis is provided for identifying the fault hidden danger of the electric control box in advance.

The utility model relates to the technical field of shock absorption of pressure gauge valve, concretely to a pressure gauge valve door connecting structure with damping shock absorption mechanism, including valve body, the mounting seat of valve body top end screwing, the pressure gauge shock absorption mechanism is screwed on the mounting seat top end, install the buffer structure in pressure gauge shock absorption mechanism, beneficial effect is: when fluid passes through pressure gauge shock absorption mechanism, fluid first impact on the elastic sheet, part fluid directly passes through elastic sheet and reaches the slow flow channel, the fluid that impact on the elastic sheet, due to the elasticity of sheet and thus consume fluid energy, reach the damping effect, the through -hole on the surface of sheet, further dispersion fluid pressure, through the concentration of flow guide ring, reduce the aperture, make fluid be concentrated, pass through slow flow channel, through the friction between fluid and channel wall and the steering of fluid, thereby constantly consume the energy of fluid, reach the effect of buffer damping, thereby complete shock absorption.

This invention discloses a high-efficiency dual-condition fluid transfer pump, relating to the field of fluid machinery technology. Addressing the problems of existing fluid pumps being single-function, inefficient, and lacking adaptability to various operating conditions, this invention achieves high-efficiency fluid transfer by optimizing the pump impeller structure and fluid channels, resulting in high transfer efficiency, low energy consumption, and minimal wear. Through a closed internal circulation channel and a throttling adjustment component, the adjustable conversion between mechanical kinetic energy and fluid pressure is achieved. It can be widely applied to various fluid transfer scenarios and various scenarios involving the mutual conversion of mechanical kinetic energy and fluid pressure.

A balanced pneumatic regulator includes a body, an inlet seat element, a piston, and a piston plunger. The body includes a central axis extending through the body. The inlet seat element is fixedly positioned within the body, and the inlet seat element is fluidly coupled to a fluid inlet. The piston is positioned within the body downstream of the inlet seat element. The piston is configured 2024 / 098057 to translate axially along the central axis of the body. The piston includes an internal pressure chamber. The piston plunger is positioned least partially within the internal pressure chamber. During translation of the piston, a pressure on a downstream end of the piston is at least partially equalized by the pressure within the internal pressure chamber of the piston, which is supplied by fluid pressure from the fluid inlet to the piston plunger.

The invention relates to a rotary tool (10), the tool body (12) of which extends between a driven end (16) and a front end (18) along a central axis of rotation (14), the rotary tool comprising: a receiving region for receiving a deburring element (30) which is movable relative to the axis of rotation along a radial axis of movement between an inner position and an outer position; and a fluid channel (20) which is fluidically connected to the receiving region in order to apply fluid pressure to the deburring element, wherein the rotary tool has a mechanical spring which generates a preloading force and pushes the deburring element radially outwards into the outer position and preloads the deburring element in the outer position, and wherein, depending on a fluid pressure prevailing in the fluid channel, an additional force acting radially outwards can be applied or is applied to the deburring element.

The invention relates to the technical field of magnetic particle grinding, in particular to a magnetic particle grinding device with shot blasting and polishing functions, and mainly overcomes the defects of high equipment cost, low working efficiency and the like caused by the fact that the shot blasting and polishing functions cannot be integrated in the prior art and the defect that an existing shot blasting and polishing device cannot be suitable for a long pipeline. The device comprises a reciprocating linear driving pair, a magnetic field generating assembly and a planetary clamp, the magnetic field generating assembly comprises a fixing ring and a plurality of electromagnets, and the planetary clamp comprises a supporting frame, a planet carrier, a sun gear, a planet gear, an inner gear ring, a driving piece and a locking piece. According to the device, shot blasting or polishing machining is completed through movement of the pipeline relative to the magnetic particle structure, limitation of factors such as fluid pressure and space can be avoided, and the device is suitable for machining of long pipelines; meanwhile, the device has shot blasting and polishing functions, transfer of the pipeline between workshop sections can be omitted, the number of purchased equipment can be reduced, and therefore the equipment cost is effectively reduced, and the working efficiency is improved.

A steering system controllable by a redundant braking system, the redundant braking system including a primary braking control module, a secondary braking control module, and a plurality of braking units controlled by the primary braking control module or the secondary braking control module. There is at least one hydraulic motor connected to a component of the steering system, and fluid pressure in the hydraulic motor is controlled by the secondary braking control module. Wheels of the steering system are configured to turn right when the secondary braking control module operates the hydraulic motor during a first operating mode, and the wheels of the steering system are configured to turn left when the secondary braking control module operates the hydraulic motor during a second operating mode.

An apparatus for testing rings cut from pipes, comprising: a plurality of test chamber sections which, when placed together, define a test chamber for receiving the ring to be tested, the test chamber sections comprising at least a first test chamber section defining a first inner face of the test chamber and a second test chamber section defining an opposed second inner face of the test chamber, the first and second inner faces defining annuli arranged to contain the ring to isolate the inside of the ring from the outside; means for clamping the test chamber sections together to form the chamber; a fluid inlet port in one of the chamber sections to allow a pressurized fluid to be admitted to the chamber outside the ring when received in the chamber; and one or more sensors for measuring strain and deformation of the ring and fluid pressure.

A sample filtering device and a sample filtering method, the sample filtering device comprises a storage container, a driving member, a filter and a weight detector which are sequentially communicated, the driving member comprises a liquid outlet end which is communicated with the filter, a first pipeline is communicated between the liquid outlet end and the filter, a second pipeline is connected between the liquid outlet end and the storage container, the second pipeline has a damping effect, and is used for returning the fluid in the first pipeline to the storage container when the fluid pressure in the first pipeline exceeds a preset value; the storage container is arranged on the weight detector, the weight detector is used for detecting the weight of the fluid in the storage container, and whether the filter is blocked can be judged according to the fluid weight change value. The sample filtering device provided by the application can realize low-cost detection in a contact mode without introducing a pollution source, can predict pipeline pressure and has an overpressure safety protection function, reduces the risk of liquid overflow, pump pipe and filter membrane damage caused by filter blockage, and has high detection reliability.

The present invention is a hydraulic control apparatus (10) that activates and deactivates a downhole tool, such as a reamer, at a desired downhole location in a borehole. The apparatus includes a piston (20), a housing (40), a coil spring (48), and a guide pin (80). The piston (20) has a cam portion (26) with a continuous slotted groove (62). There is a slide member (64) and a force member (66) within the slotted groove so that the piston moves longitudinally and rotationally within the housing according to the guide pin within the slotted groove. At the desired downhole location, drilling fluid pressure passes a pressure threshold to move a front outlet of the piston to an opened position past an end of the housing, while rotating the piston according to the slide member and force member in the slotted groove. The apparatus alternately extends and retracts the reamer by opening and closing the front outlet by hydraulic control.

The invention relates to a rotary tool (10) which extends with a tool body (12) along a central axis of rotation (14) between a driven end (16) and a front end (18), with a receiving area for receiving a deburring element (30) which is movable relative to the axis of rotation along a radial axis of movement between an inner position and an outer position, with a fluid channel (20) which is fluidly connected to the receiving area for applying fluid pressure to the deburring element, wherein the rotary tool has a mechanical spring which generates a preload force and pushes the deburring element radially outwards into the outer position and preloads the deburring element in the outer position, wherein, depending on a fluid pressure applied in the fluid channel, the deburring element can be or is subjected to an additional force acting radially outwards.