1206 results about "System pressure" patented technology

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 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 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 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.

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 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.

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.

The invention relates to the technical field of piezoelectric liquid pumps, in particular to a piezoelectric liquid pump and a cooling device. The compression chamber and the constant-pressure chamber are arranged in a communicating mode, the piezoelectric assembly can drive the volume change of the compression chamber, a first one-way valve assembly is arranged at the communicating position of the compression chamber and the constant-pressure chamber, and the first one-way valve assembly limits fluid to flow to the constant-pressure chamber in a one-way mode; the medium inlet is communicated with the compression chamber and the outside and provided with a second one-way valve assembly, and the second one-way valve assembly limits fluid to flow to the compression chamber in one direction; and the at least two medium outlets are communicated with the constant-pressure cavity and the outside. The constant-pressure chamber is arranged between the medium outlets and the compression chamber, the first one-way valve assembly is arranged at the communicating position of the constant-pressure chamber and the compression chamber, the constant-pressure chamber can be used for buffering system pressure fluctuation and stabilizing system pressure, and synchronism and consistency of multiple strands of medium fluid output from different medium outlets are improved.

The invention relates to the technical field of dry powder conveying, and discloses a dry powder closed conveying online high-precision intelligent sampling analysis system and method.The system comprises an air sealing device used for preventing dry powder from escaping in the non-sampling time period, forming a barrier through airflow, isolating a sampling pipeline and maintaining system pressure balance; the stirring device is used for homogenizing the sample; the tabletting device is used for tabletting the loose powder into a compact sample wafer; when the dry powder enters the dry powder inlet and the sampling pipeline, the sampling control valve is used for controlling; wherein the air seal device comprises an external air source, an air seal branch pipe and a corresponding air seal control valve; the stirring device comprises a vertical dry powder stirrer and a corresponding blanking valve; the pressure relief opening is formed in the upper right part of the vertical dry powder stirrer; the tabletting device comprises a tabletting machine and a push-out rod. The whole sampling detection process can be automatically realized, the labor cost is saved to a great extent, and the working efficiency is improved.

The invention discloses a drilling device for hydraulic ring geological exploration, and particularly relates to the technical field of geological exploration, the drilling device comprises a driving assembly, the driving assembly is provided with a direction adjusting assembly used for adjusting the angle, the direction adjusting assembly is provided with a drilling assembly used for drilling work, and the driving assembly is provided with a feeding adjusting assembly. According to the drilling device for hydraulic ring geological exploration, power is provided for the hydraulic telescopic rod through the hydraulic oil pumping assembly, stable axial feeding of the drilling assembly is achieved, the drilling depth is accurately controlled, the pressure relief assembly monitors the pressure of a hydraulic system in real time, and when the pressure exceeds a set threshold value, the hydraulic telescopic rod is driven to rotate; the electromagnetic ring drives the movable pipe to slide to expose the pressure relief hole, pressure relief is achieved through backflow of hydraulic oil, the situation that the device is damaged due to too large pressure caused by hard rock strata and the like is avoided, the elastic piece pushes the movable pipe to reset to close the pressure relief hole after the pressure is recovered, stable and balanced feeding pressure is guaranteed, self-adaptive pressure adjustment is achieved, and operation safety and reliability are improved.

This invention relates to the field of temperature control device technology, and particularly to a thermostat, a heat dissipation system, and a vehicle. The thermostat has a first passage, a second passage, a third passage, and a fourth passage. The thermostat, by adding a second passage, can preheat the radiator when performing a small circulation loop at low temperatures. It also adds a fourth passage for automatic pressure relief under high pressure conditions. This invention solves the problems of existing thermostats having limited functionality and low integration, only able to control the opening and closing of the small and large oil circulation loops. Furthermore, it addresses the issues of high-temperature oil causing significant thermal and pressure shocks to the radiator when the large circulation loop is open, affecting the reliability of the heat dissipation system, and the inability to promptly relieve pressure when the system pressure is too high.

The invention provides a bearing load real-time monitoring and hydraulic pressure self-adaptive adjusting system and method, and the system comprises a signal sensing unit which is used for collecting a bearing vibration signal, a hydraulic system pressure signal and a main shaft rotating speed signal; and the signal processing and calculating unit is connected with the signal sensing unit and is used for processing the collected signals, estimating the bearing load based on a pre-trained soft measurement model and generating a hydraulic control instruction. The dependence of traditional bearing load monitoring on an expensive force sensor is broken through, and by integrating operation signals such as vibration, hydraulic pressure and rotating speed which are easy to obtain, the bearing load monitoring precision is improved. According to the method, the incidence relation between signals and loads is established through off-line modeling, non-intrusive load real-time estimation is achieved, meanwhile, feed-forward and feedback composite control is adopted, hydraulic pressure is adjusted in a self-adaptive mode according to the estimated loads, traditional empirical fixed setting is replaced, monitoring, adjusting, early warning and maintenance prompting functions are integrated, and real-time monitoring is achieved. The technical problems that a traditional scheme is high in cost, blind in adjustment and dispersed in function are effectively solved.

The utility model discloses a high-pressure hydrogen filling system of a sample for a metal material impact test, which comprises a sample hydrogen filling container, a high-pressure recovery container, a low-pressure recovery container, a waste gas tank, a plurality of manual valves, a pressure monitoring device and a hydrogen purity monitoring device which are connected with one another through a process pipeline, the pressure monitoring device is used for monitoring system pressure, and the hydrogen purity monitoring device is used for monitoring hydrogen purity in the pipeline. The utility model provides a movable sample hydrogen charging system, which simulates the service state of a high-pressure hydrogen-contacting equipment material, ensures that enough diffusible hydrogen exists in the material, simultaneously controls the use amount of hydrogen, recycles the used hydrogen, avoids unsafe factors caused by hydrogen emission, can meet the requirement of carrying out an impact test on a metal material under a hydrogen charging condition, and is high in practicability. And a convenient method is provided for metal material hydrogen embrittlement research.

The invention relates to the field of valve control, in particular to a vacuum system pressure stabilization control method based on valve control. The vacuum system comprises a cavity and a vacuum pump communicating with the cavity through a valve, and the method comprises the steps that S1, based on cavity sampling pressure and target pressure, the target valve opening weight of the next period is calculated through incremental PID; s2, according to the relation between the pre-calibrated valve opening and the valve opening weight, the target valve opening corresponding to the target valve opening weight is obtained; and S3, adjusting the valve to the target valve opening, and returning to the step S1 until the current pressure of the cavity is adjusted to the target pressure. The chamber pressure control precision of the vacuum system can be improved.