11 results about "Pressure phases" patented technology

The invention discloses a ring main unit emergency pressure relief automatic triggering method and system linked with air pressure monitoring, and relates to the technical field of ring main units, and the method comprises the following steps: collecting a multi-point air pressure time sequence at the moment of an arc fault of a ring main unit, carrying out the phase difference analysis, and generating a pressure phase distribution diagram; identifying a phase reversal interval based on the phase distribution, and forming a shock wave cancellation risk time sequence result; carrying out superposition reconstruction on the multi-point pressure amplitudes to obtain a spatial superposition pressure evolution diagram; and constructing a continuous risk accumulation curve, and implementing pre-trigger control according to the continuous risk accumulation curve, so that pressure relief is started before shock waves are superposed again. According to the method, through multi-point air pressure phase analysis and spatial superposition reconstruction, shock wave cancellation interference is eliminated, a continuous risk accumulation curve is constructed, and emergency pressure relief trigger delay of the ring main unit is avoided; and front triggering is realized based on a risk accumulation curve, so that pressure relief is started before shock waves are superposed again, the compression peak value of the shell is reduced, and the safety of the ring main unit under an arc fault is improved.

A vibration damper (1) includes a container tube (2), an inner tube (3), a piston (4), a piston valve device (5), a bottom valve device (6), a first overflow pipe (11), an electrically operable first control valve (9), and an electrically operable second control valve (10). The inner tube (3) is arranged in the container tube (2). The piston (4) is axially movable in the inner tube (3) and divides the internal space of the inner tube (3) into a first working chamber (AK1) and a second working chamber (AK2). The piston valve device (5) is arranged at the piston (4) and configured to allow the damping medium to overflow between the first working chamber (AK1) and the second working chamber (AK2) during the tension and pressure phases of the vibration damper (1). A compensation chamber (AGK) is provided between the inner circumference of the container tube (2) and the outer circumference of the inner tube (3). The bottom valve device (6) connects the second working chamber (AK2) in the working chamber to the compensation chamber (AGK) so that the damping medium can overflow between the working chamber (AK2) and the compensation chamber (AGK) during the tension and pressure phases of the vibration damper (1). The first overflow pipe (11) is arranged between the inner pipe (3) and the container pipe (2) and provides a first additional flow path (Ü1) from the first working chamber (AK1) in the working chamber to the compensation chamber (AGK).

The invention discloses a gas state evaluation and risk discrimination method based on a pressure time sequence, and the method comprises the steps: collecting a pressure value through a single pressure sensor, and obtaining pressure time sequence data according to different sampling frequencies; performing continuous gradient analysis on the pressure time sequence, and generating four types of phase segments and two-dimensional phase features; a pressure phase hypergraph is constructed, and a hypergraph path composed of super nodes and super edges is formed; constructing and updating a working condition template library, and matching the working condition template library with a current hypergraph path to generate a two-dimensional phase residual signal; a layered state machine is constructed based on the two-dimensional phase residual error, state transition is driven, and a multi-state gas state is output; and generating a risk level according to the polymorphic gas state and the residual signal, executing valve closing and recording an event. According to the method, pressure time sequence data are collected through a single pressure sensor, and precise recognition and risk judgment of the multi-state state of the gas pipeline are achieved in combination with two-dimensional phase feature analysis and multi-layer state machine modeling.

The invention relates to the technical field of semiconductor packaging, in particular to a crimping quality real-time detection method and system.The method comprises the steps that pressure sensor data and displacement encoder data in the crimping process are collected in real time, and a pressure-displacement curve is generated; characteristic parameters of the pressure-displacement curve are extracted, wherein the characteristic parameters comprise the pressure fluctuation amplitude of the contact stage, the local slope change value of the main pressure interval and the high-frequency oscillation frequency of the pressure maintaining stage; synchronously normalizing the pressure fluctuation amplitude, the local slope change value and the high-frequency oscillation frequency into dimensionless risk values; and respectively carrying out weighted fusion on the risk values through respective weight coefficients, calculating a comprehensive quality score, and judging the crimping quality according to the comprehensive quality score. According to the method, the three-stage characteristic parameters are extracted through the pressure-displacement curve, a traditional single-point threshold value method is replaced, transient abnormity is accurately captured, rapid response can be achieved, and the hysteresis problem of crimping quality offline analysis is solved.

The utility model discloses a large grate-fired pressure phase-change heat exchange hot water boiler which comprises a base, a first hydraulic push rod is arranged on the base, a second hydraulic push rod is arranged below the first hydraulic push rod, a third hydraulic push rod is arranged below the second hydraulic push rod, a fourth hydraulic push rod is arranged below the third hydraulic push rod, and a third hydraulic push rod is arranged below the fourth hydraulic push rod. A metal blade is arranged on the base, a motor is fixedly connected to the metal blade, a bearing is fixedly connected to the metal blade, a pressure reduction piece is arranged on the base, and a fire grate is arranged in the pressure reduction piece. By means of the structure, the motor drives the metal blades to rotate through the bearing, so that the air inlet amount is adjusted, the first hydraulic push rod, the second hydraulic push rod and the third hydraulic push rod push the fourth connecting block to drive the pressure reducing piece and the second circular ring to move, and the second circular ring drives the fire grate to move to achieve fuel layering; and insufficient combustion caused by accumulation of the combustion layers is prevented.

The application discloses a papermaking equipment-oriented Internet of Things fault evolution analysis and maintenance decision method, relates to the technical field of monitoring and analysis, and comprises the following steps: acquiring pressure pulsation data collected by a pressure sensor arranged at the back of a suction box panel and the inlet of a vacuum pump; acquiring acoustic emission data collected by an acoustic emission sensor arranged synchronously with the pressure pulsation data; calculating ultrasonic intensity data according to the acoustic emission data; when the ultrasonic intensity data exceeds a preset intensity threshold, performing phase analysis on the pressure pulsation data to obtain pressure phase angle data; matching the pressure phase angle data with a pre-stored cavitation source phase feature library, if the pressure phase angle data falls within a first predetermined phase angle range, generating first maintenance instruction data, and if the pressure phase angle data falls within a second predetermined phase angle range, generating cleaning instruction data and performing a cleaning operation on the suction box panel. The application has the effect of improving fault evolution analysis efficiency.

The invention discloses a closed alternating pressure polishing control method and system for a fine structure part, and the method comprises the steps: placing a to-be-machined part in a machining cavity to construct a closed loop, and filling the to-be-machined part with a polishing solution to form a constant-volume and pressure-maintaining machining environment; the polishing solution is driven to circularly flow in the closed loop, alternating pressure is applied, the polishing solution is rigidized at the high-pressure phase of the alternating pressure, selective material removal is conducted on the microcosmic convex peak, and the polishing solution is kept in the flexible fluid state at the low-pressure phase or when the polishing solution flows through the microcosmic concave valley so that chip removal can be achieved; acquiring current temperature data of the polishing solution and current output resistance moment data of a power source for driving the polishing solution to circulate in real time; and if the descent slope of the current output resistance moment data reaches a preset threshold value, generating a compensation instruction to increase the switching frequency of the alternating pressure or increase the amplitude of the alternating pressure. According to the method, precise targeted polishing is achieved, and the consistency of the removal rate in long-period machining is maintained.

The present application relates to the technical field of offshore platform anchoring, and discloses a wave energy device anti-typhoon anchoring system, which comprises a wave energy device floating body structure, a constant-pressure phase change energy storage device, an anchor chain and an anchor. The constant-pressure phase change energy storage device is arranged in the wave energy device floating body structure, and comprises a shell. A partition plate is arranged in the shell, and divides the shell into a first chamber and a second chamber. A compression spring tension rod component is arranged in the first chamber and extends at least partially to the outside of the shell. An air bag type constant-pressure component is arranged in the second chamber, and the compression spring tension rod component can act on the air bag type constant-pressure component. One end of the anchor chain is connected to the part of the compression spring tension rod component extending to the outside of the shell. The anchor is connected to the end of the anchor chain away from the compression spring tension rod component. The present application can solve the problem of anti-typhoon of the anchoring system in shallow water, and can ensure the safe and long-term use of the key components of the anchoring system, thereby improving the service life and safety.

The application relates to the technical field of temperature-pressure phase diagram modeling, and discloses a temperature-pressure phase diagram modeling method based on a Grover model, which comprises the following steps: S1: obtaining the thermal expansion coefficient, volume and isothermal bulk modulus thermodynamic data of a rare earth tantalate system under different temperature and pressure conditions; S2: respectively correcting the molar volume and the isothermal compressibility under standard atmospheric pressure, reducing the influence of excessive sensitivity of the heat capacity on the coupling relationship between the temperature and the pressure, so as to realize the correction of the Grover model; and S3: obtaining the Gibbs free energy change through the corrected Grover model state equation, and linearly superimposing the Gibbs free energy change and the Gibbs free energy under standard atmospheric pressure given by a thermodynamic database to obtain a temperature-pressure phase diagram model. The application can ensure the accuracy of the obtained Gibbs free energy, thereby ensuring stable modeling and ensuring the reliability of the phase diagram.

The application relates to a positioning ring fixing support structure of an ultrahigh-pressure phase modifier, and belongs to the electrical engineering technical field of a stator of the ultrahigh-pressure phase modifier. The positioning ring fixing support structure comprises a base, an insulating support plate, a positioning ring one and a positioning ring two. The base is installed on a main water inlet and outlet pipe body pipe. The insulating support plate is connected with the base through fasteners. The insulating support plate has a double-fork structure. The top end of each fork is provided with an arc-shaped groove. The positioning ring one is arranged in the arc-shaped groove of one fork of the insulating support plate and is used for fixing an upper-layer insulating water guide pipe. The positioning ring two is arranged in the arc-shaped groove of the other fork of the insulating support plate and is used for fixing a lower-layer insulating water guide pipe. The base, the insulating support plate, the positioning ring one and the positioning ring two are matched and used for rigidly fixing the upper-layer and lower-layer insulating water guide pipes on the main water inlet and outlet pipe body pipe in a whole mode. The application is favorable for avoiding water joint cracking and water leakage caused by large stress and ensuring the safety and stability of a complex water route in the ultrahigh-pressure phase modifier in long-term operation.

The invention discloses durability testing equipment for a pedal assembly, and belongs to the technical field of automobile part testing. The equipment comprises a test bench, a treading execution mechanism, a sensing detection system and an integrated closed-loop control system. The control system is configured to execute a multi-stage test sequence at least comprising a loading stage and a pressure maintaining stage, and perform real-time pressure closed-loop control on the execution mechanism based on feedback of the pressure sensor in the loading stage or the pressure maintaining stage. A built-in fault diagnosis module of the system monitors pressure and displacement data in real time, and when a pressure deviation target value exceeds a set threshold value or a displacement change rate exceeds a limit, test is immediately interrupted and an alarm is given. According to the invention, high-fidelity and high-consistency load simulation is realized through closed-loop control, the safety and reliability of the test process are guaranteed in combination with intelligent diagnosis, and the problems of simulation distortion and poor safety in the traditional open-loop test are solved.