204 results about "Pressure wave" patented technology

The invention relates to the technical field of non-electrical variable control, and discloses an industrial water chiller temperature intelligent adjusting system, which comprises a refrigeration circulation loop and a control unit, the control unit calculates a steady state control component based on the water outlet temperature deviation, performs differential processing on the refrigerant pressure to extract the gradient, and outputs the gradient. Generating a transient compensation component when the gradient exceeds a dynamic noise threshold; according to the method, the problem of thermal lag is solved by utilizing the pressure wave transmission speed advantage, aggressive response is prevented from triggering low-pressure shutdown through a safety margin constraint mechanism, the pressure safety margin is calculated in real time, a gain coefficient is determined according to a nonlinear model, and a final driving instruction is generated. And the dynamic balance of the control response speed and the system physical security boundary is realized.

The invention discloses a pure electric vehicle heat pump type whole vehicle thermal management system and method, and relates to the technical field of new energy vehicle thermal management, and the method comprises the following steps: constructing a combined twin system of thermal fluid, structural vibration and acoustic fluctuation, collecting pressure waves and vibration phases by using an array sensor, forming a steady state baseline spectrum and a transient state baseline spectrum, and calculating the temperature of the steady state baseline spectrum and the transient state baseline spectrum; and a unified reference is established. According to the method, a combined twinborn system of thermal fluid, structural vibration and acoustic fluctuation is constructed, the dynamic characteristics of pulsating waves are accurately monitored, and instability early warning is carried out by using a phase locking tracking method. Through pipeline topology reconstruction and segmented damping link design, a self-adaptive pulsation buffer zone is introduced, and pulsation energy is effectively absorbed. And in combination with a multi-target control law and a time reflection mirror cooperative regulation strategy, refrigerant flow is accurately controlled, pulsation energy is actively counteracted, and stable operation of the system is guaranteed. Through the innovative design, the stability of a heat management loop is improved, the fault risk caused by pulsation is reduced, and the cooling efficiency and safety are improved.

An acoustic matching structure is used to increase the power radiated from a transducing element with a higher impedance into a surrounding acoustic medium with a lower acoustic impedance. The acoustic matching structure consists of a thin, substantially planar cavity bounded by a two end walls and a side wall. The end walls of the cavity are formed by a blocking plate wall and a transducing element wall separated by a short distance (less than one quarter of the wavelength of acoustic waves in the surrounding medium at the operating frequency). The end walls and side wall bound a cavity with diameter approximately equal to half of the wavelength of acoustic waves in the surrounding medium. In operation, a transducing element generates acoustic oscillations in the fluid in the cavity. The transducing element may be an actuator which generates motion of an end wall in a direction perpendicular to the plane of the cavity to excite acoustic oscillations in the fluid in the cavity, and the cavity geometry and resonant amplification increase the amplitude of the resulting pressure oscillation. The cavity side wall or end walls contain at least one aperture positioned away from the center of the cavity to allow pressure waves to propagate into the surrounding acoustic medium.

The invention discloses a transformer arc fault equivalent test device and a control method, and relates to the technical field of power equipment fault simulation and safety test, and the method comprises the steps: carrying out the corresponding high-pressure gas storage through a high-pressure gas storage unit according to target pressure data calculated by a choking flow dynamic coupling model; the quick release unit is used for matching fault duration according to the test trigger instruction so as to release the high-pressure gas stored in the high-pressure gas storage unit; the energy injection unit injects high-pressure gas into the test oil tank to form shock waves; the safety protection unit starts an interlocking protection mechanism based on the test data; the monitoring control unit controls each unit to act, monitors the operation process of each unit in real time, and obtains and identifies the validity of test data to optimize the test process; according to the invention, automatic test process control is realized, the arc fault key damage effect can be accurately quantified and reproduced, high-precision matching of pressure wave time domain characteristics is realized, and the reliability of a test result is ensured.

The invention discloses an electric forklift gantry synchronous inclination system and an inclination system control method, and relates to the technical field of vehicle engineering and electrical control, and the method comprises the following steps: establishing a time-frequency phase-locked observation baseline, and calibrating an abnormal trigger window by collecting a pressure wave change track of the gantry synchronous inclination system under a reverse pressure bearing condition; generating a pressure wave characteristic fingerprint and a time delay matrix as dynamic references for resonance path identification; and according to the pressure wave characteristic fingerprints and the time delay matrix, inverting a hydraulic pipeline reflection topology, identifying a pressure energy concentration area, extracting a resonance source anchor point, constructing a wave energy distribution diagram, and forming a space positioning basis of the standing wave risk. According to the method, hydraulic standing wave risk modeling and boundary extraction are achieved through time-frequency observation and resonance path recognition, a standing wave damping structure is constructed in combination with the phase conjugate test and track shaping technology, steady-state damping and high-precision synchronous inclination control of the portal under reverse pressure bearing are achieved, and the system stability and operation safety are improved.

The invention discloses a gas pipe network leakage point accurate positioning method based on a multi-source signal attenuation model, and belongs to the technical field of gas pipe network safety monitoring. The method comprises the following steps: arranging monitoring nodes integrating pressure waves, sound waves and an optical fiber vibration module according to a triangular coverage principle, and synchronously acquiring signals through a GPS (Global Positioning System) or the Ethernet; performing targeted denoising on the three types of signals by adopting a wavelet threshold method, a self-adaptive noise cancellation method and an empirical mode decomposition method; constructing a single signal attenuation sub-model associated with the fuel gas viscosity, the density, the pipe diameter and the sound wave dominant frequency, and fusing the single signal attenuation sub-model into a unified attenuation model through information entropy dynamic weight; solving a leakage point coordinate enabling the error between the theoretical value and the measured value to be minimum by utilizing a gradient descent method; through actual coordinate verification, if an error is greater than 5 meters, attenuation coefficient iterative optimization is adjusted. The system adapts to different pressure grades, gas types and complex working conditions, has the advantages of being high in anti-interference capacity and low in operation and maintenance cost, and is suitable for daily operation and maintenance and emergency disposal of the pipe network.

The application relates to the field of gas pressure safety monitoring, and discloses a multi-scene gas pressure safety guarantee and remote monitoring system. The system comprises a dual-mode sensing module, a topology mapping module, a wave speed cooperation module, a fluid routing module, a routing locking module and a remote monitoring module. The wave speed cooperation module utilizes the difference between the propagation speeds of radio waves and pressure waves to send a preemptive wake-up frame, drives a downstream node to start sampling and backtrack to read a hardware cache before a pressure wave arrives, and realizes complete capture of a transient waveform. The fluid routing module constructs a high-reliability control slice containing only physically connected links and a full-through monitoring slice based on radio frequency based on fluid connectivity parameters. The routing locking module generates cascaded locking instructions bound to the control slice, prevents mis-transmission of the instructions beyond a physical breakpoint by using a routing overhead mechanism, and reports a state after a circuit is opened by the monitoring slice. The application effectively solves the problems of transient leakage of low-power devices and mismatch between wireless control logic and physical topology.

The present application belongs to the technical field of oil and gas drilling equipment, and particularly relates to a double-period QPSK continuous wave signal detection method, aiming at solving the problem that the prior art cannot accurately detect and identify drilling fluid pulse signals. The method comprises: collecting a drilling fluid continuous pressure wave QPSK output signal as a measurement-while-drilling signal; wavelet-decomposing the measurement-while-drilling signal to obtain a noisy drilling fluid pulse signal and a noise signal; combining the noise signal, and filtering the noisy drilling fluid pulse signal through a pre-constructed RBF neural network nonlinear adaptive filter to obtain a noise-filtered drilling fluid pulse signal. The present application realizes accurate detection and identification of drilling fluid pulse signals.

This application provides a multi-parameter Gaussian beam inversion imaging method, apparatus, and device for acoustic VTI media, belonging to the field of seismic data processing technology. Based on normal time-difference correction velocity parameters, non-elliptic parameters, and Thomsen parameters, the pressure wave field control equation in the acoustic VTI medium is parameterized to obtain a migration operator. Based on the migration operator, the acquired actual seismic data is migrated to obtain actual migration imaging results. Based on the migration operator, the difference between the forward-modeled seismic data containing and without point scatterers is migrated to obtain a point spread function. The point spread function is spatially convolved with the initial perturbation parameter model to obtain simulated migration imaging results. Based on the actual and simulated migration imaging results, a first model loss is determined. The initial perturbation parameter model is iterated with the goal of minimizing the first model loss, improving the stability of imaging and parameter estimation in weakly illuminated areas.

A pump comprising a fluid inlet (1) with an inlet control element (4), a fluid outlet (2) with an outlet control element (5), an interior (3), an oscillator element (6) configured to cause longitudinal oscillations in the fluid in the interior (3) of the pump, and at least one pressure sensor in the interior (3) for monitoring the internal pressure, characterized in that the interior (3) is shaped such that the pressure waves are focused in the area of ​​at least one of the passages (1, 2), wherein at least one wall of the interior (3) is shaped as a concave mirror, and wherein the inlet (1) and / or outlet (2) are arranged at the focal point of the concave mirror, and that the oscillator element (6) is arranged relative to the concave mirror and to the respective at least one passage (1, 2) such that pressure waves generated by it are focused at this focal point.wherein inlet (1) and outlet (2) are arranged side by side less than one inlet or outlet width apart at their edges on a common wall of the interior (3) and the wall of the interior (3) opposite this wall is designed as a concave mirror whose focal point lies in the region of inlet (1) and outlet (2), or inlet (1) and outlet (2) are opposite each other at a protrusion of the wall of the interior (3), wherein the focal point is located exactly in this protrusion.

A low energy liquid degasification device has a liquid reservoir connected to an input channel above it and a cylinder below it. The input channel has several embedded isolation valves which allow the channel to be closed off into several independent chambers. The cylinder has a piston capable of moving up and down under the action of an actuator located below it and which seals the cylinder. Upon filling the liquid reservoir, input channel, and cylinder above the piston with a largely incompressible and inexpansible liquid and sealing the isolation valves, the piston is moved downward increasing the enclosed volume and generating a vacuum. Agitation of the assembly produces cavitation and pressure waves inside, generating bubbling that removes dissolved gas from the liquid.

The application discloses a DST test pipe column safety checking method and relates to the technical field of oil and gas field exploration and development. The method comprises the following steps: a pipe column stress distribution model is established according to pressure impact, axial and radial vibration effects in the perforating process; a perforating explosion pressure field is calculated through impact load data of the pipe column at the perforating explosion moment, and spiral buckling evaluation is carried out; a packer stress model in the perforating process is established according to the type of the packer, the safety of the packer under the perforating working condition is analyzed, and packer safety evaluation under the perforating working condition is formed; the pipe column is subjected to the perforating pressure wave and three-direction stress effects, plastic conditions and strength conditions of the fourth strength theory are obtained, and the fourth strength theory is used for pipe column strength calculation and checking; and the pipe column safety in the perforating process is comprehensively evaluated based on the spiral buckling evaluation, the packer safety evaluation and the fourth strength theory calculation result. The method is simple in calculation, convenient in operation and simple and easy to implement in evaluation.

The application discloses a kind of based on waveform tracking and active reverse phase air supplementing volumetric pump outlet pulsation suppression system and control method thereof, it is related to pulsation suppression technical field, for solving the problem that volumetric pump outlet pressure pulsation causes fluid delivery instability and affects system operating state during operation, by the real-time acquisition and phase analysis of the outlet pressure waveform of the volumetric pump to be measured, pressure fluctuation trend is constructed, based on phase reverse matching generation air supplementing regulation instruction realizes the reverse phase synchronization of air chamber regulation action and pressure change, and dynamic evaluation and compensation correction are carried out to gas-liquid coupling characteristics in combination with liquid level response, while introducing hysteresis control mechanism to closed-loop judge regulation termination and pulsation return state, to realize the adaptive suppression of pressure pulsation under different operating rhythm, improve outlet pressure stability, reduce pulsation residual amplitude, enhance system dynamic response consistency and operating reliability.

The present application relates to hydrate depressurization production numerical simulation technical field, specifically relates to hydrate decomposition method and system considering pressure wave time lag and pore structure entropy, the method includes the following steps: calculating pore structure entropy, constructing saturation and structure entropy dependent time memory kernel, combining decomposition rate threshold, pressure drop threshold, forming the decomposition front indicator function with prediction-correction mechanism;The time memory kernel, space-time inseparable causal kernel and threshold response function are subjected to space-time convolution operation, based on the decomposition front indicator function, an integral form of non-local memory hydrate decomposition rate model is established;The Peacley number is calculated by grid Darcy velocity, the scalar characteristic memory time is extended to the second-order symmetric anisotropic memory time tensor, the second-order tensor type memory variable is constructed and the evolution equation is established, the non-local memory hydrate decomposition rate model is coupled to the energy conservation equation and two-phase Darcy seepage pressure equation, and the decomposition result is obtained by iterative solution.

A layering bottom-hole regulator controlled by pressure waves relates to the technical field of efficient exploitation of oil fields and comprises a shell, an overflowing cavity and a bottom-hole regulator cavity are formed in the shell, a motor, a movable valve element and a fixed valve element are installed in the bottom-hole regulator cavity, a bottom-hole regulator barrel is further fixedly arranged in the bottom-hole regulator cavity, a movable plug is arranged in the bottom-hole regulator barrel in a sliding and sealing mode, and a push rod is fixedly connected to the lower end of the movable valve element. The upper end of the movable plug is provided with an inclined face, and the movable valve element and the push rod rotate to push the movable plug to axially slide. A production allocation channel is arranged on the upper portion of the movable plug, a production allocation opening is formed in the side wall of the production allocation barrel, the opening degree of the production allocation holes in the movable valve element and the fixed valve element is adjusted through rotation of the movable valve element, the opening degree of the production allocation channel in the movable plug and the opening degree of the production allocation opening in the production allocation barrel are adjusted, and the two opening degrees are kept consistent; a spring pushing the movable plug upwards is arranged at the lower end of the movable plug. An opening degree valve is additionally arranged, the opening degree valve can change the opening degree in real time along with oil layer pressure fluctuation, and therefore the distribution yield can be controlled more accurately.

The application provides a method of coupling momentum potential theory and pressure wave decomposition and application thereof, and belongs to the field of fluid mechanics and aeroacoustics. The method first acquires flow field data, performs Helmholtz decomposition on the momentum density field based on the momentum potential theory to obtain momentum densities of fluid dynamics, acoustics and entropy components; then, the momentum densities of the components are taken as independent source terms to construct independent Poisson equations for describing fluid dynamics pressure, acoustic pressure and entropy pressure; and finally, the equations are solved to obtain pressure wave fields of the physical components. The application establishes a physical mapping between momentum modes and pressure modes, gets rid of the dependence on filtering threshold or propagation speed criterion in the prior art, realizes automatic and physically consistent separation of acoustic pressure (true sound) and fluid dynamics pressure (pseudo sound) in complex turbulent flow, and is suitable for noise mechanism research, source positioning and noise reduction design.

Apparatus for treatment with pressure waves, comprising: a projectile guided along the movement path, an applicator and a stop, pneumatic means for application of pressure to the projectile for the purpose of movement, wherein the projectile is adapted for striking onto the applicator, which pneumatic means comprises a double valve means for application of pressure to the projectile towards the applicator during a first activation time and in the reverse direction during a second activation time, and a control means adapted, after a partial return movement in a second activation time, to end this second activation time, to start a first activation time and, after only a part of the movement path, to reverse the movement from a return movement into a forward movement.

This technology provides advantages in identifying the cause of abnormalities in a body dispensing device. [Solution] The liquid dispensing device comprises a dispensing head that dispenses liquid from a plurality of nozzles, a plurality of piezoelectric elements arranged in each of the plurality of nozzles, a detection unit that detects a residual vibration signal corresponding to the distortion of the piezoelectric element caused by the pressure wave generated in conjunction with the operation of the piezoelectric element for each of the plurality of piezoelectric elements, and a processing unit that processes the residual vibration signal detected for each of the plurality of piezoelectric elements. The processing unit performs a creation step of creating a feature map showing the distribution of feature quantities of the residual vibration signal in the plurality of nozzles, and a determination step of determining an anomaly based on the feature map.

The application discloses a drilling fluid flow channel pressure control system and method based on wireless short transmission communication. The system comprises: a pressure detection unit arranged at a specified position of a drilling fluid flow channel, used for detecting the drilling fluid flow channel pressure at the position; a wireless short transmission transmitting short section used for transmitting drilling fluid flow channel pressure data to a wireless short transmission receiving short section, the wireless short transmission receiving short section used for transmitting the drilling fluid flow channel pressure data to a closed-loop adjustment control circuit through a MWD system; and / or the wireless short transmission transmitting short section used for transmitting the drilling fluid flow channel pressure data to the closed-loop adjustment control circuit; and the closed-loop adjustment control circuit used for generating a control signal according to the drilling fluid flow channel pressure data, and controlling a hydraulic thrust block unit to change the position of a thrust block, so as to change the drilling fluid flow channel area and adjust the drilling fluid flow channel pressure. The drilling fluid flow channel pressure can be adjusted in real time, and the drilling fluid pressure condition for maintaining the mud pressure wave pulse signal transmission can be maintained.

The invention relates to the technical field of high voltage and insulation, and discloses an oil flow charged space charge test system and method.The method comprises the steps that firstly, to-be-tested insulating oil is injected into a closed circulation oil way, the oil flow speed and the oil temperature are adjusted to set values through a flow speed controller and a temperature controller, and stable operation is conducted till the oil flow state is uniform; time sequence parameters are set through a time sequence controller, a high-voltage pulse generator is triggered to apply high-voltage pulses with set amplitude and pulse width to the pipeline wall, and an external electric field under the actual working condition is simulated; the pulse laser is triggered, laser is focused into linear light spots through the beam shaping unit, and the linear light spots penetrate through the double-layer optical window to irradiate flowing oil flow and excite pressure waves; the piezoelectric sensor array acquires pressure wave signals and transmits the pressure wave signals to the high-speed acquisition card; and the data processing unit performs deconvolution, acoustic wave equation solving and inversion processing on the acquired signals through a charge reconstruction algorithm to eliminate the influence of a sensor response function. The problem that a traditional method cannot adapt to the dynamic oil flow test is solved.

The invention relates to a ball valve with a split type valve cover structure and an assembling jig of the ball valve. The ball valve comprises a main valve body and an auxiliary valve body. The main valve body and the auxiliary valve body are connected through a bolt to form a cavity. The through hole ball body is rotationally and hermetically mounted in the cavity; positioning grooves are formed in the main valve body and the auxiliary valve body; the valve cover is connected with the main valve body through a bolt, and a driving lever fixedly connected with the through hole ball body is rotationally mounted on the valve cover; the buffer part comprises a sealing gasket and a sealing bulge mounted on the main valve body; the buffer piece is used for weakening or offsetting pressure waves in the ball valve; when the pressure fluctuation is transmitted to the direction of the valve cover; the sealing gasket can be extruded, the extrusion force between the sealing gasket and the sealing protrusion is increased, the deformation quantity of the sealing gasket is increased, and therefore the sealing performance is improved, water flow seepage caused by overlarge pressure fluctuation is avoided, the service life of the ball valve can be prolonged, the reliability of the ball valve can be improved, and the ball valve is particularly used on a high-water-pressure and high-flow-speed pipeline.

An impact body (30) being configured for a pressure wave device (10), which is intended to treat biological tissue, comprising: - a contact side (34), being configured to be, in operation, in contact with the treated biological tissue, and - an interface side (32) being configured for connecting the impact body (30) to the pressure wave device (10) such that the impact body (30) introduce, along a treatment direction (TD) and into the treated biological tissue, being in contact with said contact side in operation, a pressure wave (16) resulting from the interface side (32) being impacted by a projectile (28), when operating the pressure wave device (10), the interface side (32) and the contact side (34) being opposite to each other, wherein the impact body (30) comprises at least a cavity (20) between the contact side (34) and the interface side (32).

The present application relates to the technical field of pipeline hydrostatic test, and especially relates to a pressure water supplementing and metering device for municipal pipeline hydrostatic test, which comprises a water tank, a booster pump, a flowmeter and a control cabinet, a program controller is arranged in the control cabinet, further comprising a pressure sensor and a vibration sensor arranged along the axial direction of the pipeline to be tested, and an active tunable damper arranged between the pump outlet and the pipeline; the program controller synchronously collects pressure and vibration data, carries out correlation analysis on the data, generates a pressure wave space-time propagation graph, calculates a water hammer risk index and divides a risk level through a nonlinear fusion model according to the dominant frequency, amplitude, propagation speed change rate and vibration energy of the pressure wave, selects an inhibition strategy according to the risk level, calculates a pressure peak value reduction rate and a wave fluctuation decay time according to the data after inhibition, and generates an effect evaluation value. The present application realizes active sensing, graded inhibition and effect evaluation of water hammer risk, and improves the safety and intelligent level of the hydrostatic test.

A method for predicting a property of a subsurface formation, includes: drilling one or more wellbores into the subsurface formation at a well location; conducting a seismic survey at the well location to construct a primary seismic image volume, the primary seismic image volume dataset comprises at least a pressure wave velocity vp, a shear velocity vs, and a density rho, in both time and frequency domains; conducting well logging at the one or more wellbores to generate logging information at the well location; generating an auxiliary seismic image volume for seismic-guided property prediction using Kriging at the well location; generating a prediction operator based on the primary seismic image volume, the auxiliary seismic image volume and the well logging information; feeding a seismic image volume and the prediction operator into a property prediction engine; and generating the predicted property of the subsurface formation.

The present application provides a technique for facilitating determination of a cause of an abnormality in a liquid discharge apparatus. The liquid discharge apparatus has: a discharge head that discharges liquid from a plurality of nozzles; a plurality of piezoelectric elements respectively arranged at the plurality of nozzles; a detection unit that respectively detects, for the plurality of piezoelectric elements, a residual vibration signal corresponding to a deformation of the piezoelectric element due to a pressure wave accompanying operation of the piezoelectric element; and a processing unit that processes the residual vibration signals respectively detected for the plurality of piezoelectric elements. The processing unit performs: a creation step of creating a feature quantity map representing a distribution of a feature quantity of the residual vibration signals in the plurality of nozzles; and a determination step of determining an abnormality based on the feature quantity map.

Included in the present disclosure is a system, including an elongated body having a guidewire lumen. In some embodiments, the system includes a pressure wave emitter disposed about the elongated body and having an optical fiber configured to transmit laser energy into a fluid to create plasma, a cavitation, or both, in the fluid, such that the laser energy is configured to enable a pressure wave to be generated. According to some embodiments, the system includes a generator configured to couple with the pressure wave emitter and deliver the laser energy thereto via an optical pathway. The system may include a detector configured to detect i) an aspect of the laser energy along the optical pathway, ii) an aspect of the optical fiber, or iii) both.

This invention proposes a method for testing flow-induced noise in pipelines, comprising the following steps: Step S1: Determine the measurement positions at the upstream and downstream flow channels of the component under test, normalize the measured signals, and calculate the pressure power spectral density of the pipe wall; Step S2: Calculate the time-domain cross-correlation coefficient of the wall pressure fluctuations and analyze the correlation characteristics between the wall pressure pulsations; Step S3: Perform spectral eigenorthogonal decomposition on the pressure pulsation field and achieve spatiotemporal decoupling through time-domain-frequency-domain conversion; Step S4: Extract the dominant flow-induced noise modes, construct an empirical frequency-wavenumber spectrum, and decompose the energy distribution of the fluctuations into contributions from different frequency and wavenumber combinations; Step S5: Analyze the decoupled flow-induced noise characteristic results and identify the amplitude-frequency characteristics of the flow-induced noise; This invention can realize real-time measurement of pressure pulsations in pipelines, achieve decoupling analysis of flow field pulsations and sound pressure pulsations in the measured signals, and identify the characteristics and generation mechanism of pipeline flow-induced noise.

This invention relates to the field of mixed-flow turbine technology, specifically to a method and system for identifying risk areas during wide-load operation of mixed-flow turbines. The method includes: acquiring unit operating status parameters and pressure pulsation signals from the draft tube and bladeless zone; decomposing the signals based on variational mode decomposition, filtering vortex band components within a preset frequency band, and calculating the effective amplitude value; obtaining the pressure wave velocity by querying the wave velocity characteristic curve using the guide vane opening, calculating the pressure wave wavelength and geometric position difference, and obtaining the phase resonance risk coefficient; calculating the draft tube vortex band intensity index based on the operating head and the effective amplitude value; comparing the phase resonance risk coefficient and vortex band intensity index with preset thresholds to determine the risk area type of the current operating condition. This invention eliminates the interference of head on amplitude determination through dimensionless processing and corrects the pressure wave velocity, achieving accurate identification of risk areas under wide-load, full-condition operation of mixed-flow turbines.

The application relates to the technical field of low-temperature refrigeration, and provides a magnetic screw drive thermal-acoustic refrigeration system and method, which comprises at least one thermal-acoustic refrigeration basic unit, the unit comprising a pressure wave generating device, a thermal-acoustic refrigerator and a resonance tube. The pressure wave generating device comprises a pressure-resistant shell, a rotating motor, a magnetic screw shaft, a mover permanent magnet, a compression piston and a rotor permanent magnet arranged on the magnetic screw shaft; the magnetic screw shaft is connected with the rotating motor, the compression piston is arranged in the pressure-resistant shell, the mover permanent magnet is connected with the compression piston and is arranged in opposite interval with the rotor permanent magnet; a compression cavity is formed between the compression piston and the pressure-resistant shell; and the resonance tube is communicated with the compression cavity and the thermal-acoustic refrigerator. The rotating motor is used as a power source, the pressure wave generating device is used to replace a linear compressor, the manufacturing difficulty and cost are reduced, the rotating motor has high power density and high magnetic coupling efficiency, a large sound power can be output in a small volume, and the demand for high refrigeration capacity density is met.