1336 results about "System pressure" patented technology

The invention provides a thermal behavior experiment system and method under a narrow rectangular channel reflooding cooling condition. The system comprises a heating water storage tank, a nitrogen tank, a steam tank, a shield pump, a preheating section, a first direct-current power supply, a second direct-current power supply, a narrow rectangular channel test section, a steam-water separator, a surge tank, a flow control valve, a silencer and an electromagnetic valve. The experimental working medium is deionized water, and re-submerging cooling experiments under different system pressures, working medium supercooling degrees, heating wall surface heat flux densities, working medium submerging speeds, heating wall surface initial temperatures and channel interior initial liquid levels can be carried out on an experimental section of a narrow rectangular channel structure. The device is suitable for narrow rectangular channel structures with different sizes, and can be used for carrying out re-submerging experiments on experiment sections with single-plate double-channel, double-plate three-channel and more channels. The system pressure and the inlet flow in the submerging process can be kept stable, and it can be ensured that the supercooling degree of a working medium, the heating wall surface temperature and the initial liquid level are controllable.

The invention relates to the field of control systems, and discloses a vent valve control system with a pressure regulation function for a generator set, which is used for breaking through the limitation of static state, single target and passive response of a traditional vent valve control method. Comprising the following steps: acquiring pressure, flow velocity and valve opening data of a ventilation system in real time, generating a dimensionless parameter set for dynamic calibration, integrating parameter uncertainty disturbance terms to form a hybrid prediction model, solving an optimal valve opening instruction sequence by adopting a multi-target robust optimization algorithm, and designing a layered safety control mechanism. The system safety is guaranteed through dual-threshold monitoring and emergency intervention, redundant sensor data fusion and parameter reverse optimization are introduced, and fault tolerance and model self-adaption are achieved. According to the method, through collaborative innovation of dynamic modeling, robust optimization and intelligent fault tolerance, the control precision, the anti-interference capability, the safety and the reliability of the ventilation system of the generator set are remarkably improved, and the method is suitable for complex and changeable industrial operation scenes.

The invention relates to the technical field of data analysis, in particular to a comprehensive management system and management method for steam condensate drainage data of a vulcanizing machine. According to the comprehensive management system and method, a generative adversarial network is adopted to calculate the steam flowing node correlation degree, analyze the condensate drainage valve opening and closing influence, construct a steam hydrophobic topology network and establish a flow distribution model, and temperature gradient changes are combined; the method comprises the following steps: acquiring a steam condensate drainage state mapping structure, enhancing the global analysis capability of a condensate drainage system, analyzing steam load balance by adopting a long-short-term memory network, predicting steam supply demands, forming a steam condensate drainage intelligent regulation and control strategy, calculating pressure abnormal deviation, analyzing a steam leakage rate, predicting a steam loss trend, and detecting an abnormal switch state of an electromagnetic valve. The system stability is improved, and the energy loss is reduced by extracting the blockage characteristics of the condensate drain valve, evaluating the pressure loss of the system, improving the fault prediction capability, adjusting the opening and closing states of the electromagnetic valve and correcting the control instruction of the condensate drain valve according to the steam condensate drain intelligent regulation and control strategy and the condensate drain abnormal characteristic analysis result.

The invention provides an agricultural machinery working condition prediction and adaptive control method based on multi-sensor fusion, and relates to the technical field of agricultural machinery working condition prediction, and the method comprises the steps: constructing a working condition data stack, and caching mechanical operation data and surrounding environment data collected by a multi-source sensor according to a time sequence; preprocessing the working condition data to obtain a standardized feature matrix, inputting the standardized feature matrix into the working condition prediction model, and outputting a predicted working condition parameter set; calculating a predicted working condition adaptation degree coefficient to represent the matching degree of the predicted working condition and the ideal working state; inputting the predicted working condition parameter set and the adaptation degree coefficient into a multi-objective optimization controller, and iteratively solving an adaptive control parameter set through a dynamic inertia weight particle swarm optimization algorithm in combination with operation safety requirements; and the self-adaptive control parameter set is issued to an agricultural mechanical execution mechanism, and cooperative regulation and control of the target advancing speed, the driving power and the hydraulic system pressure are achieved, so that the mechanical operation state is optimized, and closed-loop feedback control is formed.

The invention belongs to the technical field of hydraulic transmission and control, and discloses a high-precision positioning control method and system of a servo electro-hydraulic actuator. Real-time operation parameters of a servo electro-hydraulic actuator under different working frequencies are obtained, a servo valve dynamic return difference characteristic curve is constructed, a return difference characteristic change mode is extracted, and a dynamic influence model of return difference characteristic change on positioning precision is established. Based on the model, a frequency self-adaptive compensation strategy is designed in combination with a pressure fluctuation value of a hydraulic system, and real-time correction of a servo valve control signal is achieved. According to the method, a differentiation strategy combining low-frequency feed-forward compensation and high-frequency feedback compensation is innovatively adopted, a smooth transition mechanism is designed, and the problem that the positioning precision fluctuates under the frequency change working condition in a traditional control method is solved. According to the invention, high-precision positioning control of the servo electro-hydraulic actuator in a full frequency band range is realized, and the positioning precision and stability of the system under a dynamic working condition are improved.

The invention discloses a CO2-oil near-miscible phase pressure acquisition system and method based on convective mixing, and belongs to the field of CO2 oil displacement. The system comprises a high-temperature and high-pressure reaction kettle, a temperature and pressure control system, a gas injection module, a liquid injection module and a monitoring control module. According to the method, the oil phase and the carbon dioxide are induced to form a convective mixing effect by dynamically regulating and controlling the injection flow rate, and when no interface of the system reaches a mutual convective mass transfer state, the system pressure corresponding to a phase interface disappearance critical point is directly recorded as a near-miscible-phase pressure value. The near-miscible pressure value obtained by the method is high in accuracy, the single test time is shortened to 1 hour, the test period is remarkably shortened, near-miscible pressure parameters under different temperature conditions can be measured in a short time, the CO2-oil near-miscible pressure can be measured by simulating a high-temperature and high-pressure environment of a stratum, and the method is suitable for popularization and application. And high-timeliness key phase state data support is provided for unconventional oil and gas reservoir development.

The invention relates to the technical field of engineering machinery, and particularly discloses an electrically-driven metering pump load-sensitive system, a control method and engineering machinery, the electrically-driven metering pump load-sensitive system comprises a control unit, a driving motor assembly, a metering pump, a pilot hydraulic control unit, a pilot handle assembly, a load-sensitive valve assembly, an actuator assembly, a sensor assembly and a pressure difference control module; the driving motor drives the metering pump to supply oil to the load-sensitive valve assembly so as to drive the actuator assembly to operate; the control unit receives the maximum outlet pressure and the maximum load pressure of the pump collected by the pressure sensor, receives a system target pressure difference signal of the pressure difference control module at the same time, and synchronously controls the rotating speed of the motor and the valve target pressure difference output by the proportional pressure reducing valve. The system aims to solve the problems that a traditional upstream compensation load sensitive system lacks a flow saturation resisting function, and a downstream compensation load sensitive system has extra reversing energy consumption and fixed system pressure difference setting.

The invention discloses an efficient sealing valve in a high-pressure environment, and relates to the technical field of sealing valves. Comprising a main body, a filter plate is fixed in the main body, a cleaning assembly driven by a motor is arranged on one side of the filter plate, an opening and closing assembly is arranged at the bottom of the cleaning assembly, a blocking assembly is arranged in a limiting frame, and the blocking assembly is rotationally connected with a first blocking plate and a second blocking plate. According to the device, a second bevel gear rotates to drive a connecting shaft to rotate, then a first fixing rod and a second fixing rod are driven to move in cavities formed in the two sides of the interior of a connecting frame, and therefore a rotating shaft and a rotating ring are driven to rotate; the first blocking plate and the second blocking plate rotate to block the residual oil sample, so that the effect of preventing the residual oil sample from slowly seeping out of the nozzle due to the release of system pressure or the action of self gravity after the valve is closed is achieved.

The invention discloses a cutting fluid full-automatic centralized liquid supply control method and system, cutting fluid concentration data and liquid supply system pressure data are obtained through a sensor array, real-time monitoring data are generated by adopting a high-frequency sampling technology, and if the cutting fluid concentration data deviates from a preset threshold range or the liquid supply system pressure data exceeds a stable range, the cutting fluid is monitored. If so, generating an abnormal signal; according to the abnormal signal, the operation frequency of a liquid supply pump is adjusted through a proportional-integral-differential algorithm, a closed-loop control system is formed to maintain a target pressure value, and meanwhile the opening value of a liquid distribution valve is adjusted according to the concentration deviation signal; and the cutting fluid return liquid is extracted from the adjusted liquid supply system, the cutting fluid return liquid is treated through a multi-stage filtering device and a centrifugal separation device, and if it is detected that the impurity content of the cutting fluid return liquid is lower than a preset threshold value, it is judged that purification treatment is completed. The stable performance of the cutting fluid can be kept, the service life of equipment is prolonged, the processing quality and the production efficiency are improved, and the cutting fluid has important practical value.

A method for starting up vapor-recompression units comprises: providing a vapor recompression sub-system comprising one or more vapor-recompression units, wherein the vapor recompression sub-system has a vapor inlet and a compressed-vapor outlet; providing a means of reducing vapor density through pressure reduction in vapor communication with the vapor recompression sub-system; reducing pressure within the vapor recompression sub-system to reach a sub-system pressure selected from 0.1 kPa to 1000 kPa; introducing a vapor mass flow to the vapor recompression sub-system at a restricted vapor mass flow rate; starting up the vapor recompression sub-system while maintaining the restricted vapor mass flow rate for a start-up time period; and then, following the start-up time period, introducing additional vapor mass flow to the vapor recompression sub-system to reach a full vapor mass flow rate. The restricted vapor mass flow rate is from 0.1% to 90% of the full vapor mass flow rate.

The invention discloses a supercritical fluid assisted polymer devolatilization distributor. The supercritical fluid assisted polymer devolatilization distributor comprises a gradually-shrinking channel, a throttling channel and a gradually-expanding channel which are connected in sequence. A static mixer is arranged in the throttling channel, the upstream pressure is maintained to be above a supercritical state by increasing fluid resistance, meanwhile, the mixing effect of supercritical fluid and polymer melt is enhanced, stable and uniform foam flow is formed, and pressure fluctuation is avoided; an automatic pressure relief valve assembly is arranged on the upper portion of the divergent channel and composed of a valve opening, a valve cover plate, a spring, an adjusting knob and the like, when the system pressure exceeds a set value, exhaust is automatically started, and controllable pressure relief is achieved. A plurality of rows of flow distribution holes are formed in the lower part of the distributor to ensure that the melt uniformly flows out to form stable melt strips; the problems that traditional equipment is difficult to pressurize and not timely in pressure relief are solved, the supercritical state maintenance, gas-liquid separation and melt forming processes are optimized, the volatile component removal efficiency is improved, the phenomenon that melt strips are broken or accumulated is effectively prevented, and continuous and stable operation of the devolatilization process is guaranteed.

The invention discloses a gas storage integrated operation model construction method and system based on digital and intelligent twinning, and relates to the field of gas storage integrated operation model construction, and the method comprises the steps: constructing a single well IPR and VLP curve; a mode of combining forward pressure regulation and reverse pressure regulation is adopted, a pressure value set of all nodes after pressure stabilization is output, and a preliminary pressure steady-state scheme is formed; an economic value evaluation index function is constructed, and the total daily operation cost of the system under the given gas production rate is evaluated; a comprehensive optimization model based on a neural network is constructed, and injection-production quantity reference values of all wells and target values of all nodes are output; and verifying the stability of the comprehensive optimization model based on the neural network according to the output injection-production quantity reference values of all wells and the target values of all the nodes. The method has the advantages that the physical law of gas storage injection and production, the system pressure balance and the economical efficiency target are deeply fused, and a fast and reliable closed loop from pressure steady-state optimization to an economical optimal decision is achieved.

The invention relates to the technical field of intelligent control, and particularly discloses a steam explosion control system, method and device, and the system comprises an obtaining setting module which is used for obtaining material parameters, determining a material processing demand based on a real-time application scene, determining an initial control strategy through combining with the material parameters, and obtaining initial control parameters; the stage control module is used for monitoring system pressure in real time based on a preset sensor so as to judge a pressure control stage, and parameter optimization of the corresponding stage is carried out to obtain a first control parameter; the monitoring and evaluation module is used for monitoring material parameters in real time and comparing the material parameters with material processing requirements so as to obtain a comprehensive evaluation result; the processing optimization module is used for judging intelligent control performance based on the comprehensive evaluation result and performing adaptive adjustment on the first control parameter; the control rhythm of the system can be processed more accurately, evaluation and adjustment are carried out, the control accuracy and stability of the system are greatly improved, and meanwhile the energy consumption of the system is effectively optimized.

The invention provides a quick connector for a liquid cooling pipeline. The quick connector comprises a male connector assembly and a female connector assembly, wherein the female joint assembly comprises a female joint main body and a locking sleeve, the locking sleeve is axially and slidably arranged on the female joint main body in a sleeving manner, and a locking mechanism formed by a plurality of limiting steel columns which can move in the radial direction in an annular array manner is arranged in the female joint main body; the male connector assembly comprises a male connector body, and an annular locking groove matched with the limiting steel column is formed in the outer surface wall of the insertion end of the male connector body. The inner wall of the locking sleeve acts on the limiting steel column through a sliding sleeve, the limiting steel column is adopted to replace a steel ball, the contact mode of a locking part is changed into linear contact or small-area surface contact from point contact, the stress area is increased, the contact pressure is remarkably reduced, abrasion and plastic deformation are effectively restrained, and the service life of the locking sleeve is prolonged. The connector can bear more frequent plugging and pulling and stronger system pressure impact and vibration, and the service life is greatly prolonged.

The invention relates to the technical field of hardware machining, and discloses hardware part automatic machining equipment which comprises a motion control module used for coordinating actions of all motion parts in the part automatic machining equipment and carrying out multi-axis cooperative control, and a positioning algorithm module used for carrying out multi-axis cooperative control according to feedback data of a sensor. The state monitoring and fault diagnosis module is used for collecting equipment operation parameters of hydraulic system pressure, motor current and vibration data in real time, and the intelligent control algorithm module is used for dynamically adjusting the closing path and pressure of the positioning plate according to the stamping process requirement. And the intelligent optimization and data management module is used for recording production data such as processing times, fault logs and energy consumption of the equipment. Through operation of all moving parts of the equipment, unnecessary waiting, blocking and repeated actions among the parts are avoided, the machining period of a single part is shortened, the overall machining efficiency is effectively improved, and the problem that the machining efficiency is low is solved.

The utility model relates to a sealing structure of supercritical extraction equipment, which comprises a reaction kettle, the outer end of the reaction kettle is sleeved with an end cover, the bottom end of the end cover is fixedly connected with a fixing ring, the outer end of the fixing ring is provided with a sealing groove, the inner wall of the sealing groove is rotatably connected with a sealing ring, and the bottom end of the fixing ring is fixedly connected with a movable sealing assembly. According to the structure, the elastic corrugated sealing ring, the sealing ring and the movable sealing assembly are adopted to form multiple sealing, the movable sealing assembly is matched with the pressurizing ring through the first annular cavity and the second annular cavity, the sealing force is automatically adjusted through system pressure, heat-absorbing expansion liquid in the liquid storage ring can automatically compensate for a heat-expansion and cold-contraction gap, and meanwhile the sealing effect is improved. The piezoelectric ceramic stack is combined with the stirring rod, ultrasonic-mechanical coupling extraction is achieved, mass transfer efficiency is improved, crystals on a sealing component can be removed through the generated cavitation effect, and the ultrasonic-mechanical coupling extraction device has the advantages of being reliable in sealing, high in self-adaptability and the like.

The invention relates to a low-temperature refrigeration control method of a commercial vehicle battery heat management system, which belongs to the field of new energy vehicle battery management and comprises a heating band preheating function, a fan low-temperature control function and a compressor rotating speed control function. The fan rotating speed is associated with the system pressure and the compressor exhaust temperature, it is guaranteed that the system pressure and temperature are always kept within a reasonable range during low-temperature refrigeration, the refrigeration efficiency and energy efficiency are maximized, meanwhile, the rotating speed is increased in a staged mode when the compressor is started, it is guaranteed that the rotating speed of the compressor is slowly and stably increased in the low-temperature environment, and the risks of low-temperature starting overload and starting failure are avoided; the three functions are closely matched, so that the battery thermal management system is stable, reliable, low in failure rate and suitable for being used and popularized in new energy commercial vehicles when the battery thermal management system operates at low temperature.

A surrounding rock deformation and failure test system with a rotatable stress main shaft in a three-dimensional crustal stress field is characterized in that a press machine upper pressure head and a press machine base are oppositely distributed up and down, and a loading hydraulic cylinder is connected with the press machine upper pressure head; the surrounding rock sample is vertically arranged in the axial loading space, and a simulation roadway is formed in the axis part of the surrounding rock sample; annular upper and lower end plates are fixedly connected in the upper and lower ends of the confining pressure cylinder respectively; the confining pressure cylinder sleeves the outer side of the axial loading space; a plurality of groups of mounting holes are uniformly formed in the circumferential directions of the annular upper and lower end plates; the radial pressurizing assembly comprises a supporting steel pipe and an elastic capsule. The main supporting section is sleeved with the elastic capsule, and a plurality of through holes are formed in the main supporting section. A plurality of strain bricks are pre-buried in the surrounding rock sample; the track is fixedly mounted in the simulated roadway; the micro camera is assembled on the track through the electric control trolley; and the strain gauge II and the acoustic emission probe are arranged in the simulated roadway. According to the system, the working condition that the direction of a stress field changes can be simulated in a three-dimensional true triaxial stress environment.

A method includes disposing an intervention service tool within a tubular. The intervention service tool includes an anchoring system, a shifting system, and a linear actuator system. The tubular includes a shifting profile geometry disposed within the tubular at a first location. The anchoring system, the shifting system, and / or the linear actuator system is actuated. Shifter system pressure, linear actuator system force / pressure, and displacement of the shifting system is measured. A known graph of the shifting profile geometry is compared to one or more of a measured pressure, a measured force, or a measured displacement. A position of a key disposed on the shifting system is determined relative to the shifting profile. The shifting profile geometry is engaged with the key based on the position of the key. The shifting profile geometry is positioned at a second location that is different from the first location.

The invention discloses a cooling system pressure regulation and control method and device based on multi-source data fusion, and the method comprises the steps: collecting multi-source data from a cooling system through a sensor, carrying out the fusion processing, and generating a standardized sensor data set. And calculating a comprehensive system pressure value by adopting a data fusion technology according to the standardized sensor data set to obtain a fused pressure data set. And determining a system pressure state through threshold comparison based on the fused pressure data set. And obtaining channel flow data based on the system pressure state, and adjusting the opening degree of a valve to obtain an optimized regulation and control result. And transmitting the optimized regulation and control result to a pressure maintaining system, controlling the valve flow by adopting a pressure stabilization regulation algorithm, and determining a pressure balance index. Therefore, according to the cooling system pressure regulation and control method based on multi-source data fusion, the pressure change can be dynamically responded, the system pressure can be stably maintained, and the air resistance phenomenon can be effectively eradicated.

The invention relates to the technical field of petroleum engineering, in particular to a device and method for testing migration of a proppant in a shale reservoir, and the device comprises a model system, an injection system, a vacuumizing system, a pressure field measurement system, a differential pressure measurement system, a back pressure system and a data acquisition and processing system. The model system comprises a model box, a test bin is arranged in the model box, and the test bin penetrates through the side wall of one side in the width extension direction of the model box; the pressing plate can completely cover the test bin and is detachably connected with the model box; the two fluid conveying assemblies are arranged at the two ends of the model box in the length extension direction respectively, the structures are in mirror symmetry, each fluid conveying assembly comprises a first connecting pipe, and the first connecting pipes are communicated with the testing bin. According to the device and the method, different-width fracture and netlike fracture forms of the shale reservoir can be simulated, and the migration rule of shale reservoir fracturing fluid carrying sand in the fractures can be analyzed.

The utility model discloses a winch motor starting control system which comprises a control valve set, a balance valve, a winch motor and a motor brake oil cylinder, an oil port C of the balance valve is communicated with a first oil port of the winch motor, an oil port BR of the balance valve is communicated with the motor brake oil cylinder, an oil port A of the balance valve is communicated with an oil port A of the control valve set, and an oil port B of the control valve set is communicated with an oil port C of the winch motor. And an oil port B of the control valve group is respectively communicated with an oil port PI of the control valve group and a second oil port of the winch motor. According to the winch motor starting control system provided by the utility model, the balance valve is not opened when the system pressure is small at the initial starting stage of the winch motor, so that a certain pressure is accumulated in the winch motor; only when the system pressure reaches a set value, the balance valve is opened, then unlocking pressure is output, and the winch motor is started, so that fierce jumping of the winch is effectively avoided, the running smoothness is good, and the safety is high.

The invention provides a pressure stabilization control method, device, equipment and medium for a compressed carbon dioxide energy storage system, relates to the technical field of compressed energy storage, is applied to the compressed carbon dioxide energy storage system, and comprises a high-pressure gas storage unit with a carbon dioxide pipeline at the bottom end and a liquid pump; the method comprises the following steps: acquiring state data of a high-pressure gas storage unit at an initial moment, and determining thermodynamic parameters at the initial moment according to the state data at the initial moment; according to the thermodynamic parameters and the state data at the initial moment, thermodynamic parameters and state data at the next moment are determined, the thermodynamic parameters and the state data at the moment serve as initial parameters and state data at the next moment to be subjected to iterative calculation, and thermodynamic parameters at each moment and state data at each moment are obtained; and according to the thermodynamic parameters and the state data of each moment, generating a thermodynamic change curve, and according to the thermodynamic change curve, performing frequency conversion control on the operation of the liquid pump. The energy utilization efficiency can be improved.

The invention provides an extra-high pressure safety valve off-line detection method and system, and belongs to the technical field of off-line detection, and the method comprises the steps: detection preparation, starting pressure detection, pressure maintaining performance detection and safety control, and in the detection process, if the system pressure exceeds an overpressure protection value, pressurization is automatically stopped, and an alarm is triggered. Through precise detection process, multi-dimensional safety guarantee and full-process data management and control, deep detection and reliable evaluation of the safety valve performance are realized, a defense line is built for safe operation of extra-high voltage equipment, and the system has significant practical value and technical advantages.

The invention relates to the technical field of high-end equipment manufacturing, in particular to a friction stir welding system pressure control method and system, electronic equipment and a storage medium, and the method comprises the steps that real-time sensor data in the welding process is obtained, and a controller preset algorithm module is used for analyzing and processing to obtain a real-time pressure value; and meanwhile, a plurality of modules such as a self-adaptive control algorithm module, a pressure prediction model, an online parameter identification model, a multi-mode switching module, an abnormal prediction model and an equipment health state evaluation model are further arranged to realize dynamic adjustment and control. The effects that the working pressure value of the friction stir welding system can be continuously and dynamically adjusted, the welding process is kept stable, self-adaptive control and precise control are achieved, the welding quality stability is improved, abnormity is early warned, parameters are adjusted, and the fault-tolerant threshold value is dynamically adjusted to maintain the control precision are achieved.

The invention relates to the technical field of cone valve multi-mode air supply-energy dissipation cooperative cavitation reduction devices and control methods, and discloses a fluid control device named'cone valve multi-mode air supply-energy dissipation cooperative cavitation reduction devices and control methods'. The conical valve aims to solve the problems that an existing conical valve is serious in cavitation under the working condition of high pressure difference, air supply and energy dissipation functions are separated, and response lags. The device is characterized by comprising three stages of energy dissipation perforated pipes which are arranged at the outlet end of a valve body in a gradient mode, negative pressure injection air supply pipes which are symmetrically arranged outside a flow guide cover and flow guide fins which are welded to the inner wall of a cone, and the three stages of energy dissipation perforated pipes, the negative pressure injection air supply pipes and the flow guide fins cooperate to achieve pressure gradient pressure relief, self-adaptive air supply and flow state stability; the control method dynamically adjusts the air supply intensity based on the opening degree, the pressure difference and the vibration signal. According to the technical scheme, cavitation inception and collapse impact are remarkably restrained, vibration noise is reduced, the service life of the valve is prolonged, an external air source is not needed, the system pressure drop is controllable, and the system is suitable for ultrahigh pressure difference and large-flow hydroelectric working conditions.

The invention discloses a regulation and control method and device for a vehicle cooling system, and the method comprises the steps: collecting a temperature signal and a flow speed signal of cooling liquid in real time, obtaining an engine rotating speed signal and a load signal, carrying out the fusion processing, and generating a real-time working condition parameter of the system. And on the basis of the real-time working condition parameters of the system, a pre-calibrated degassing flow control mapping table is inquired, target degassing flow is obtained through calculation, and an adjustment value of the opening degree of the degassing channel is determined accordingly. Generating a control instruction to drive an actuator to adjust the opening degree of the degassing channel according to the adjustment value of the opening degree of the degassing channel in combination with an environment temperature signal; and meanwhile, an adjusted cooling liquid temperature feedback signal is collected, and the actual heat state parameter of the system is calculated based on the difference value between the cooling liquid temperature feedback signal and the target temperature. Therefore, the system has the advantages of dynamically responding to the working condition change of the engine, optimizing the flow distribution of the cooling liquid and maintaining the pressure balance of the system, and can effectively improve the heat management efficiency and the system reliability.

The invention discloses a modular hydraulic energy recovery device and a recovery method thereof, and relates to the technical field of hydraulic energy recovery. A high-pressure pipeline of a hydraulic system is connected with the three functional modules in parallel through a multi-way pipe fitting, and a modular energy recovery system is formed. The high-pressure module adopts the combination of a leather bag type energy accumulator and a throttle valve, energy absorption is carried out aiming at the working conditions of high system pressure and slow change, and the pressure is stably released by utilizing the elastic energy storage characteristic of the energy accumulator; the high-frequency module is provided with a diaphragm type energy accumulator which is high in response speed, and instantaneous pressure fluctuation is rapidly restrained by dynamically adjusting the opening degree of a throttling valve; the power generation module drives a power generator through a hydraulic motor, and transforms the over-limit energy stored by the energy accumulator into electric energy for storage. The main control module monitors the system pressure and the change rate thereof in real time, dynamically switches the working states of the modules according to preset logic, and introduces a machine learning algorithm to optimize a threshold decision, so that the system adapts to complex working conditions.

Herein are described methods and systems for characterizing noise and noise level in pressure measurements in a downhole pressure testing operation in formation testing while drilling. The pressure measurements are acquired using a formation testing tool disposed on a drill string. The methods include drilling a borehole, extending the one or more probes into an inner surface of the borehole, performing a pressure testing operation with a first mud pump rate, wherein the pressure testing operation comprises a drawdown period and a build up period, decreasing the first mud pump rate to a second mud pump rate while measuring pressure during the build up period, decreasing the second mud pump rate to a third mud pump rate while measuring pressure during the build up period, and calculating a noise associated with pore pressure measurements during the first pressure testing operation.

The utility model relates to the technical field of pneumatic control systems, in particular to a single-action pneumatic PST system, which comprises a pneumatic actuating mechanism, a cam valve and an explosion-proof junction box, a valve position transponder is arranged at the front end of the pneumatic actuating mechanism, one end of the cam valve is communicated with a filtering pressure reducing valve, one end of the filtering pressure reducing valve is communicated with a safety valve, and the other end of the filtering pressure reducing valve is communicated with an explosion-proof junction box. And one end of the explosion-proof junction box is connected with a first electromagnetic valve and a second electromagnetic valve respectively. According to the improved single-action pneumatic PST system, the first electromagnetic valve, the hand-operated direction valve and the second electromagnetic valve are adopted, and when the single-action pneumatic PST system is used, flexible control can be conducted when the single-action pneumatic PST system faces complex working conditions and different operation requirements; the explosion-proof junction box and the energy accumulator are adopted, when the single-action pneumatic PST system is used, the electrical safety of the system in a dangerous environment can be guaranteed, meanwhile, the pressure of the system can be kept within a relatively stable range, and the stability of the system during use is improved.