35 results about "Surge control" patented technology

The invention discloses an oil-free magnetic suspension low-temperature refrigerating unit control method and a storage medium, and relates to the technical field of intelligent refrigerating unit control, cooperative control between units is achieved through a multi-agent reinforcement learning framework, and a system can autonomously recognize and restrain the pressure fluctuation coupling phenomenon between parallel units; coherence and phase difference of pressure signals between units are monitored in real time by adopting a frequency domain analysis method, so that the system can predict surge risk in advance and adopt a phase desynchronization strategy, and coupling oscillation is avoided fundamentally; the design of the collaborative reward function embeds the anti-surge priority principle into the agent decision process, it is ensured that the anti-surge control weight is automatically enhanced when the system approaches the surge boundary, and meanwhile energy efficiency optimization and operation stability are considered; a near-end strategy optimization algorithm based on an attention mechanism enables each agent to effectively learn an interaction relationship between units, thereby generating a coordinated control instruction.

The utility model discloses a methanol engine and a pneumatic control system thereof and relates to the technical field of engines. The air control system comprises a supercharger, a throttle valve, an anti-surge valve, an air inlet header pipe and a methanol rail pipe. The throttle valve is communicated with the supercharger through a throttle valve air inlet pipe, a supercharging front air inlet pipe is installed on the supercharger, and the anti-surge valve is communicated between the throttle valve air inlet pipe and the supercharging front air inlet pipe through an anti-surge connecting pipe. The air inlet main pipe is communicated with the throttle valve and is communicated with the air cylinder through the air inlet manifold; the methanol rail pipe is communicated with an external methanol supply skid-mounted device, the methanol rail pipe is a normally-opened double-layer pipe, an inner pipe of the methanol rail pipe is a methanol branch pipe, an outer pipe of the methanol rail pipe is an air branch pipe, and the methanol branch pipe is communicated with an air inlet manifold through a methanol sprayer. All-working-condition anti-surge control can be achieved, the reliability of the supercharger is improved, the engine maintenance space is enlarged, and the construction difficulty is reduced. Meanwhile, the utility model discloses a methanol engine.

The invention discloses an anti-surge control method and system of a centrifugal compressor and a storage medium, and relates to the technical field of anti-surge control of centrifugal compressors, a reference prediction operation point is predicted through a compressor physical model, a future residual error is predicted through a data driving residual error compensation model, and the anti-surge control of the centrifugal compressor is achieved. And the reference prediction operation point and the future residual error are fused to obtain a high-precision fusion prediction result, so that high-precision dynamic prediction of the surge boundary is realized. The dynamic surge margin is calculated in advance, the hierarchical intervention control strategy is executed based on the dynamic surge margin, conversion from passive response to active prevention is achieved, and surge prevention timeliness and safety are remarkably improved. And through dynamic and accurate margin management, the compressor can run closer to a high-efficiency area on the premise of ensuring safety, so that the overall energy efficiency is improved.

Methods for a turbocharged engine, comprising: Adjusting a pressure surge line of a compressor map during vehicle operation as a function of vehicle speed.

The invention discloses a gas compressor high-altitude environment test adjusting device and a surge relief control method, and the device and the method are composed of a power drive system, a test gas compressor, an environment simulation cabin, an intake and exhaust pressure adjusting device, an intake and exhaust communication pipeline, an upper computer and the like. A working point is smoothly adjusted along an equal-rotating-speed characteristic line under the high-altitude simulation condition, and the air inlet pressure is kept basically constant; in combination with multi-algorithm surge automatic judgment based on static pressure pulsation, opening coupling adjustment of a rapid surge relieving valve and an intake and exhaust pressure auxiliary adjusting valve, and intake and exhaust self-circulation instability protection under an air exhaust fault working condition, the gas compressor can rapidly and stably retreat from a surge area when approaching or entering a surge and air exhaust system abnormally; axial force violent change and exhaust side overpressure are avoided, data reliability and operation safety of the high-altitude environment gas compressor test are remarkably improved, and good engineering application value is achieved.

The application discloses a kind of magnetic suspension air compressor double valve collaborative flow dynamic response anti-surge control methods, comprising: real-time acquisition of the temperature of the intake end of magnetic suspension centrifugal compressor, the pressure difference inside and outside the pipeline of the intake end, the atmospheric pressure of the intake end;Proportional valve and solenoid valve are installed at the exhaust end of the magnetic suspension centrifugal compressor;The controller of the magnetic suspension centrifugal compressor obtains the temperature of the intake end, the pressure difference inside and outside the pipeline of the intake end, the atmospheric pressure of the intake end and calculates the current intake flow of the intake end;Based on the comparison of the current intake flow and the surge flow of the magnetic suspension centrifugal compressor under the current intake flow, the controller controls the action of the proportional valve and the solenoid valve to realize the anti-surge protection of the magnetic suspension centrifugal compressor.The present application solves the problem of slow PID adjustment reaction of the existing anti-surge method of magnetic suspension centrifugal compressor.

The invention relates to the technical field of natural gas conveying, in particular to an efficiency-increasing conveying system based on a natural gas pipeline. Suction and exhaust parameters of a compressor unit are collected through a state sensing module, and a thermodynamic rigidity index representing the nonlinear coupling degree of fluid medium pressure and temperature is constructed through a rigidity observation module; an efficiency correction mechanism is introduced to eliminate mechanical interference; the feature mapping module calculates a map distortion factor according to the static performance map, and executes coordinate system affine transformation on the static performance map to generate a dynamic map; the boundary control module reconstructs a safety boundary based on the dynamic atlas and adjusts a reflux valve; according to the method, the problem of space-time mismatching of the anti-surge control boundary and the physical working condition due to dependence on a static map under the variable component working condition of natural gas hydrogen doping and the like in the prior art is solved, self-adaptive dynamic reconstruction of the safety boundary is achieved, ineffective energy consumption is remarkably reduced on the premise that the equipment safety is guaranteed, and the pipe network conveying efficiency is improved.

Method for the control of pressure in a loop for the preparation of ammonia or methanol by means of an anti-surge control valve of a compressor and / or a compressor flow regulation valve for the recirculation of loop recirculation gas at variating flow supply of fresh synthesis gas.

An ultrasonic phacoemulsification handpiece with a sensor and a surge control system and a method. The central aspiration lumen of the ultrasonic phacoemulsification handpiece consists of two components of plug-in loose fit: a fixed lumen and an extension lumen; a small pressure sensor is mounted on the extension lumen, but still able to keep the easy-to-use size and maintain the ultrasonic performance of the handpiece. The extension lumen minimizes the effect of ultrasonic vibration on the sensor while maintaining sufficient stiffness for installing and removing the phacoemulsification tip. The design of the handpiece transducer reduces the effect of this sensor installation on the ultrasonic performance. For ultrasonic phacoemulsification cataract removal surgery, the short distance from the pressure sensor to the surgical site provides a technical solution for reliably controlling the risk of the post occlusion surge.

This invention discloses a method for anti-surge control of a compressor, comprising the following steps: S1. Obtaining the amplitude limit and rate of change limit of the pulsating pressure at the compressor inlet; S2. Real-time acquisition of the pulsating pressure signal at the compressor inlet, and calculating the measured amplitude and measured rate of change of the pulsating pressure signal according to a preset sampling period; S3. Comparing the measured amplitude with the amplitude limit, and comparing the measured rate of change with the rate of change limit; S4. Triggering an automatic anti-surge protection mechanism when the measured amplitude and measured rate of change exceed the limits; S5. After triggering the automatic anti-surge protection mechanism, controlling the compressor exhaust valve to open wider at a preset angle to reduce compressor surge. This invention effectively avoids the shortcomings of single-parameter monitoring by real-time monitoring of the amplitude and rate of change of the compressor inlet pulsating pressure, and triggering a protection mechanism when both exceed preset limits. It has the advantages of improving the accuracy of surge judgment, reducing false triggering and response delay.

A method for the control of pressure in a loop for the preparation of ammonia or methanol by using an anti-surge control valve of a compressor and / or a compressor flow regulation valve for the recirculation of loop recirculation gas at variating flow supply of fresh synthesis gas.

A compression device includes a hydrogen compressor and a return circuit having an inlet fluidly coupled with a discharge side of a centrifugal compressor and an outlet fluidly coupled with a suction side of the centrifugal compressor. A head loss control valve is positioned in the return circuit. The head loss control valve is adapted to generate a controlled head loss in the return circuit when the compressor operates at a lower flow rate than the surge control line.

The invention relates to the technical field of air conditioner compressors, in particular to an air conditioner compressor dynamic adjusting method and system adaptive to a wide-temperature-range working medium. The method comprises the steps that an air conditioner compressor information set of a multi-temperature-zone compartment is obtained, on the basis, the gas phase evacuation risk caused by an air conditioner compressor in a refrigeration zone and the liquid phase inrush risk caused by the air conditioner compressor in a freezing zone under a wide-temperature-zone working medium are analyzed, and a phase state risk information set is obtained; on the basis, the coupling effect of local flow state sudden change, caused by vehicle movement, of each temperature zone on pressure and flow oscillation of the whole system through sharing loop amplification is analyzed, and a flow state instability information set is obtained; on the basis, conflict information between a gas phase evacuation prevention control instruction and a liquid phase liquid impact prevention control instruction caused by the coupling effect is analyzed, and a multi-target control conflict information set is obtained; and based on this, a dynamic regulation and control strategy is generated, and an air conditioner compressor dynamic regulation log is output. Air conditioner pressure and flow oscillation are reduced, safe and stable operation of an air conditioner compressor is guaranteed, and the service life of equipment is prolonged.

The application discloses a centrifugal compressor unit anti-surge control method and air conditioning equipment using the anti-surge control method. The anti-surge control method determines the current anti-surge mode according to the real-time pressure ratio of the unit. When the real-time pressure ratio is greater than or equal to the pressure ratio setting value, the surge line anti-surge mode is entered. When the real-time pressure ratio is less than the pressure ratio setting value, the guide vane negative pre-whirl anti-surge mode is entered. The application combines the widened centrifugal unit operation frequency range and the modulated impeller guide vane pre-whirl angle, so that the anti-surge characteristics of the unit are stronger when the unit is operated under variable working conditions.

The invention provides a grading anti-surge control method and device for a four-stage compressor, a terminal and a storage medium, and relates to the technical field of automation of air compressor equipment. The method comprises the steps that operation parameters and operation loads of a to-be-regulated four-stage compressor are collected; according to the operation parameters, the first-stage standard flow of the four-stage compressor to be regulated and controlled is determined, and according to the operation load, the load grade of the four-stage compressor to be regulated and controlled is determined; wherein the load grade comprises any one of a low load grade, a medium-low load grade, a medium-high load grade and a high load grade; according to the load grade of the four-stage compressor to be regulated and controlled, the surge critical value of the load grade is calculated through the operation parameters; and according to the first-stage standard flow and the surge critical value, an anti-surge control strategy of the to-be-regulated four-stage compressor under the load grade is determined. The surge phenomenon can be effectively avoided, and it is ensured that the compressor can stably operate under various load conditions.

The application relates to the technical field of air conditioner compressors, in particular to an air conditioner compressor dynamic adjustment method and system suitable for wide-temperature-range working medium. The method comprises the following steps: acquiring an air conditioner compressor information set of a multi-temperature-zone vehicle compartment; based on the information set, analyzing gas phase evacuation risks caused by the air conditioner compressor in the refrigeration zone and liquid phase surge risks caused by the air conditioner compressor in the freezing zone under the wide-temperature-range working medium, and obtaining a phase state risk information set; based on the information set, analyzing the coupling effect of the local flow state mutation in each temperature zone caused by vehicle movement on the pressure and flow oscillation of the whole system through the shared circuit amplification, and obtaining a flow state instability information set; based on the information set, analyzing the conflict information between the anti-gas-phase-evacuation control instruction and the anti-liquid-phase-surge control instruction caused by the coupling effect, and obtaining a multi-target control conflict information set; based on the information set, generating a dynamic regulation strategy, and outputting an air conditioner compressor dynamic adjustment log. The air conditioner pressure and flow oscillation are reduced, the safe and stable operation of the air conditioner compressor is guaranteed, and the service life of the equipment is prolonged.

The invention relates to an air flow regulation and anti-surge control method and system for a centrifugal compressor, and the method comprises the steps: taking preset target volume flow and target pressure as control targets, and dynamically generating a valve opening line independent of a surge line based on the performance characteristics of the centrifugal compressor; actual operation parameters of the centrifugal compressor are obtained in real time to determine a current operation point; the current operation point and the valve opening line are subjected to position comparison, and when the current operation point approaches the valve opening line in the flow reducing direction due to the fact that the required volume flow is reduced, the target pressure is maintained in the mode of reducing the actual rotating speed; and if the actual rotating speed is reduced to a preset safe rotating speed and the current operating point is located in an anti-surge control area defined by the valve opening line, the current rotating speed is locked, and the bypass valve is controlled to be opened, so that the current operating point returns to a normal operating range defined by the valve opening line. The industrial problem that a centrifugal compressor cannot meet the wide-range process adjusting requirement is solved.

The application discloses a hypersonic inlet and a self-adaptive surge control method, wherein a leakage port and a pressure injection port are arranged on the lower wall of the inlet, and a movable slider with a spring is arranged on a slide rail to realize self-adaptive surge control of the inlet. When the pressure downstream of the hypersonic inlet increases, the terminal shock wave is transmitted forward, the high pressure of the shock wave train drives the movable slider to move forward, the leakage cavity on the lower wall of the inlet is opened, and the terminal shock wave is stopped at the inlet of the leakage cavity when the terminal shock wave is transmitted to the inlet, so that the forebody wave system of the inlet is not damaged, and the inlet always keeps in a starting state; when the back pressure downstream of the inlet decreases, the terminal shock wave is withdrawn, the movable slider is withdrawn under the action of the spring, and the leakage cavity is closed, so that the flow of the inlet is not affected. Therefore, the self-adaptive surge control method can improve the anti-back pressure capacity of the inlet, widen the surge margin of the inlet, and ensure the flow characteristics of the inlet when the flow field of the inlet is stable.

The application provides a blowback prevention control method for a vacuum excrement collecting system of a rail vehicle and a vacuum excrement collecting system suitable for the blowback prevention control method. Specifically, the blowback prevention control method comprises the following steps: firstly, before the rail vehicle runs, a control unit performs vacuum detection on the sealing state of an excrement inlet hose valve connected to an excrement transfer box inlet to obtain a detection result; if the detection result is qualified, the control unit controls the vacuum excrement collecting system to enter a standby state, and the rail vehicle is ready to run; secondly, during the running of the rail vehicle, the control unit monitors the closing state of each toilet discharge valve in real time and disables the corresponding fault toilet of the toilet discharge valve in an abnormal state to prevent blowback of the fault toilet, and the excrement in the toilet is transported to the excrement transfer box through a pipeline; finally, after the rail vehicle stops running, the control unit controls the abnormal pressure in the pipeline to be released to prevent blowback, and controls the excrement transfer box to be applied with positive pressure to empty the excrement.

The invention relates to the technical field of centrifugal machines, in particular to an anti-surge control method of a centrifugal machine unit and an air conditioning system. The anti-surge control method of the centrifugal machine unit comprises the following steps that the chilled water outlet temperature of the centrifugal machine unit is detected, and the temperature deviation between the chilled water outlet temperature and the target temperature is calculated; a plurality of control regions are divided according to the temperature deviation. And in each control area, the adjusting quantity of the operation frequency of the compressor and the adjusting quantity of the inlet guide vane are determined according to the temperature deviation, and the adjusting quantity of the operation frequency of the compressor and the adjusting quantity of the inlet guide vane are cooperatively distributed in the same control area. And synchronously adjusting the operation frequency of the compressor and the opening degree of the inlet guide vane according to the adjusting quantity of the operation frequency of the compressor and the adjusting quantity of the inlet guide vane. According to the anti-surge control method of the centrifugal machine unit, the surge phenomenon of the air conditioning system can be reduced, the stability and reliability of the air conditioning system are improved, and the service life is prolonged.

The utility model relates to the technical field of surge control, and discloses an electric control surge valve which comprises a valve cover, a valve body, a valve core, an electromagnet assembly, a silencing ring and a silencing sleeve, the valve body is connected with the valve cover, an air inlet is formed in one side, far away from the valve cover, of the valve body, an air outlet is formed in the side wall of the valve body, the valve core is arranged in the valve cover in a sliding mode, and the electromagnet assembly is located in the valve cover. The valve element is connected with the electromagnet assembly, the electromagnet assembly is used for driving the valve element to move so that the air inlet and the air outlet can be communicated or disconnected through the valve element, the silencing ring is connected with the side, facing the air inlet, of the valve element, and the silencing ring is used for preventing high-pressure air of the air inlet from generating dynamic pressure to cause fluctuation in the opening process of the valve element. The silencing sleeve is located in the valve body and used for dispersing airflow energy and reducing exhaust noise. The device is simple in structure, convenient to disassemble and assemble, low in manufacturing cost and maintenance cost and high in flexibility.

Methods and systems for surge control in a compressor system. A recirculation valve position may be actuated in response to identified conditions of potential surge, determined from a compressor map. Recirculation valve position may be controlled by calculating distance of current operating state to a surge line and using proportional integral control to manage the distance. Compressor speed command may be derated in response to identified surge, determined from one of speed fluctuations of the compressor speed, or variance of a compressor speed tracking error.

The invention discloses a fan anti-surge control method, which is realized based on a signal input layer, a core operation layer and an execution output layer, and is characterized in that the signal input layer collects parameter information of a fan through various sensors; a parameter acquisition module of the core operation layer is used for receiving and processing data acquired by the signal input layer; the dynamic adaptation module is used for inputting fan rated parameters and generating a basic surge curve; the surge critical calculation module dynamically corrects threshold values of an early warning line and an alarm line according to the basic surge curve, the real-time air inlet temperature T1 and the real-time medium density rho1; the grading response module compares the real-time parameters with a threshold value and outputs early warning and alarm level regulation and control instructions, and the execution output layer is used for executing the regulation and control instructions output by the grading response module. According to the anti-surge control method for the high-speed centrifugal fan, multi-parameter fusion, graded response and dynamic adaptation are achieved, the problems that in the prior art, the misjudgment rate is high, response lags behind, and energy consumption is too high are solved, and the operation safety and economical efficiency of the fan are improved.

The invention discloses a method and system for adjusting an anti-surge valve of a turbine compressor, electronic equipment and a medium, and the method comprises the steps: monitoring the operation power of the compressor in real time, comparing the operation power with preset protection surge power and a power dead zone boundary, and automatically selecting an opening or closing adjusting mode of the anti-surge valve according to power deviation; a historical stable opening degree concept is introduced, the target opening degree is calculated in combination with a binary search algorithm, and the valve can be rapidly and accurately adjusted to the optimal position; the valve position is continuously optimized through an intelligent learning mechanism, and energy consumption is remarkably reduced while safe operation of the compressor is ensured; the problems that traditional anti-surge control is lagged in response and insufficient in adjusting precision are effectively solved, and the method has the advantages of being high in self-adaption and good in energy-saving effect.

The embodiment of the invention provides a control method and device of a gas compressor, an anti-surge controller and a vehicle. The method comprises the steps that the front-back pressure ratio of a gas compressor is calculated according to the collected inlet pressure and outlet pressure of the gas compressor of the engine supercharger; the target air inflow of the throttle valve is obtained according to the front-back pressure ratio of the compressor; calculating the front-to-back pressure ratio of the throttle valve according to the outlet pressure and the collected pressure behind the throttle valve; the target throttle valve opening degree is obtained according to the front-back pressure ratio of the throttle valve and the target air inflow of the throttle valve; and the target throttle valve opening degree is controlled to control the gas compressor. According to the technical scheme provided by the embodiment of the invention, the air compressor is controlled by controlling the opening degree of the target throttle valve, the air compressor of the engine supercharger can be prevented from running under the surge working condition, and therefore the NVH performance is improved, and the service life of the supercharger is prolonged.

A system includes a dynamic compressor and a controller. The dynamic compressor includes a motor having a driveshaft rotatably supported within the dynamic compressor and a compression mechanism connected to the driveshaft and operable to compress a working fluid upon rotation of the driveshaft. The controller is connected to the motor and includes a processor and a memory. The memory stores instructions that program the processor to operate the motor to compress the working fluid at a motor speed greater than a predicted minimum surge speed plus a control margin, determine when surge events have occurred, store, in the memory, an indication of each surge event that the processor determined to have occurred, and determine whether or not to take a protective action when the processor determines that a surge event has occurred.

The application belongs to the technical field of fuel cells, and particularly relates to a centrifugal air compressor stall surge precursor identification and anti-surge control method. The method preprocesses dynamic operation data of a fuel cell centrifugal air compressor, constructs an observation characteristic vector and a vortex structure dictionary based on a sliding short-time window, solves a sparse vortex structure state code and determines an uncertainty index, constructs a precursor risk index and a risk level in combination with a grouping and aggregation result and a change amount of adjacent short-time windows, generates an anti-surge control instruction under the condition of meeting a gas supply demand and an actuator constraint, and gradually recovers after the risk is removed. According to the precursor risk index and the uncertainty, the vortex structure dictionary is updated or frozen. The application can realize early and low false alarm identification of the centrifugal air compressor stall surge precursor, and takes into account minimum intervention of anti-surge control, gas supply stability and system operation efficiency.

The invention discloses an MVR steam compressor dynamic safety margin anti-surge control system and method, and relates to the technical field of fluid machinery safety control, and the system comprises a sensor group, an anti-surge valve and a controller, or further comprises a human-computer interaction interface. The method comprises the following steps of parameter acquisition, boundary calculation, margin adjustment, control line generation and prevention and control execution. Surge generation can be predicted and intervened, efficient and safe operation of the compressor is guaranteed, the method is matched with the operation characteristics of the MVR system, a control strategy can be automatically adjusted, operation is convenient, and maintenance is visual.

The application discloses a controllable anti-surge energy-saving management system and method, relates to the technical field of variable frequency energy-saving control, and comprises the following parts: an energy storage battery cluster used for storing and releasing electric energy; a loop protection unit connected between the energy storage battery cluster and a plurality of DC bus branches of a plurality of variable frequency devices outside, used for realizing independent on-off control and overcurrent protection of the DC bus branches; an anti-surge control module used for inhibiting surge voltage and surge current in the transient process of branch connection or disconnection; and an energy-saving management unit used for reducing the loss when the system is in steady operation. Through the time-sharing multiplexing control strategy, the bypass switch is closed to realize micro-ohm direct connection in the steady operation, the inherent contradiction between surge suppression and low loss is solved, the voltage peak when the fault branch is disconnected is inhibited through the soft removal technology, the single-point fault diffusion is prevented, and the system reliability, safety and electrical life are remarkably improved.