60 results about "Surge control" patented technology

The invention provides an anti-surge control method. The anti-surge control method comprises the following steps: acquiring historical data of a surge point; inputting the historical data of the surge points into the to-be-trained model to obtain an anti-surge model; based on the anti-surge model, determining an anti-surge line of the fan; the anti-surge line is generated by translating the abscissa of the surge line of the fan in the anti-surge coordinate system rightwards by a first preset unit and translating the ordinate downwards by the first preset unit; the real-time fan inlet flow and the real-time fan total energy head of the fan are obtained, and the real-time working condition point of the fan is determined; whether the real-time working condition point is located below an anti-surge line or not is judged, and if not, the opening degree of an anti-surge valve is adjusted to 100%; if yes, the anti-surge opening degree and the anti-surge valve opening time are determined based on the real-time working condition point, the anti-surge valve is opened according to the anti-surge valve opening time, the anti-surge valve is controlled to operate at the anti-surge opening degree, and the problem that the position area where the working condition point of the draught fan is located cannot be accurately and automatically adjusted at present is solved.

The invention relates to the technical field of compressors, in particular to a series-connection automobile towing compressor system and an automatic surge control method. The series-connection automobile towing compressor system comprises a plurality of stages of automobile towing compressors, a plurality of temperature reduction devices, a bypass return valve, a plurality of temperature reduction adjusting valves and a plurality of orifice plate flowmeters. The problems that in the prior art, cost is high, energy consumption is large and the control effect is not ideal are effectively solved, the multiple stages of automobile dragging compressors are arranged in series and matched with the temperature reducing device and the bypass backflow valve, effective circulation and temperature control of media are achieved, cost of independently using a surge backflow valve in the prior art is reduced, and meanwhile the control effect is good. Through the arrangement of the vortex shedding flowmeter, the pressure sensor, the temperature sensor and the rotating speed sensor, the inlet flow, pressure, temperature and rotating speed of each stage of compressor are accurately measured, in combination with theoretical surge pressure ratio calculation, the surge risk is pre-judged in advance and automatically controlled, and energy consumption increase caused by premature intervention of a bypass return valve at the low rotating speed is avoided.

The application discloses a kind of anti-surge control methods for compressor unit, specifically relates to the field of compressor unit operation control, the application is deployed pressure, flow, temperature and other various sensor terminals in the installation and commissioning phase of compressor unit, real-time acquisition inlet pressure, flow, exhaust pressure and other working parameters, after acquisition, data is preprocessed, smooth data using moving average filtering method, according to 3σ principle washes abnormal value, according to missing proportion processing missing value and normalization, based on preprocessed data, build operating condition model, combined with inlet flow and exhaust pressure and other parameters, calculate anti-surge threshold in low, medium and high load area, at the same time, use historical data to build exhaust pressure and inlet flow prediction model, predict future state. By comparing predicted value and threshold value to judge surge state, and then adjust inlet and outlet adjusting valve opening, ensure the stable operation of compressor unit, effectively prevent surge phenomenon from occurring, improve the safety and reliability of compressor unit operation.

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 application discloses a centrifugal air compressor surge control method, system, electronic equipment and storage medium, and the centrifugal air compressor surge control method comprises the following steps: obtaining the exhaust pressure variation intensity of a centrifugal air compressor; performing classified control according to the obtained exhaust pressure variation intensity value; when it is detected that the exhaust pressure variation intensity is less than a set maximum pressure variation threshold value and greater than a set minimum pressure variation threshold value, switching the anti-surge valve to an anti-surge automatic control mode; under the anti-surge automatic control, slowly opening the anti-surge valve to introduce airflow into the atmosphere and discharge the airflow; after continuously detecting that the exhaust pressure variation intensity is less than the set minimum pressure variation threshold value and maintaining the set time, switching the anti-surge valve out of the anti-surge automatic control mode and restoring the anti-surge valve to a normal control mode; and when it is detected that the exhaust pressure variation intensity is greater than the set maximum pressure variation threshold value, switching the anti-surge valve to a surge protection mode and switching to a surge fast-opening mode. The application can improve the stability of the centrifugal air compressor.

The invention discloses a heat pump system control protection method, and belongs to the technical field of heat pump systems. The method comprises a pneumatic anti-surge control stage and an energy efficiency optimization stage, in the pneumatic anti-surge control stage, double-temperature check and double-pressure check are adopted, real-time detection values of the pressure ratio and the superheat degree are obtained, the real-time detection values of the pressure ratio and the superheat degree are compared with a preset critical surge pressure ratio threshold value and a preset critical superheat degree threshold value respectively, and according to the comparison results, the energy efficiency of the air conditioner is optimized. When in a critical surge state, entering a pre-judgment stage, alarming and not stopping; when the surge state is reached, entering a practical judgment stage; after the PLC program receives the surge alarm signal, entering a rapid processing stage, and executing a deceleration shutdown measure; in the energy efficiency optimization stage, energy efficiency is optimized through latent heat cooling control, intelligent work control and multi-machine-head benefit optimization control. By adopting the control strategy provided by the invention, the comprehensive energy efficiency IPLV performance of the heat pump system can be improved to the maximum extent.

A method (1000) is disclosed for performing anti-surge control in a centrifugal compressor (100) working with a fluid in supercritical conditions, wherein the centrifugal compressor (100) is endowed by a surge limit line (200) independent from pressure and temperature values, comprising the phases of: calculating (1200) a compressor operating point OP, as a function of an isentropic exponent in volume (k vs ); and calculating (1300) a distance between the compressor operating point OP and the surge limit line (200).

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.

1. Name of the designed product: graphic user interface for real-time condition monitoring of centrifugal compressor. 2. Use of the designed product: centrifugal compressor. 3. Design points of the designed product: graphic user interface displayed on the display screen panel. 4. Picture or photo best indicating the design points: front view. 5. Use of the graphic user interface: for displaying real-time condition and anti-surge control of centrifugal compressor main and auxiliary equipment. 6. Change state description of the graphic user interface: the front view is the main interface of the design.

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 anti-surge dynamic adjustment method for the blast furnace blower comprises the following steps: carrying out a surge test, obtaining surge point data under different stationary blade angles, and establishing an initial surge line; performing temperature compensation on the initial surge line to obtain a dynamic surge line changing along with the inlet temperature; based on the dynamic surge line, determining a dynamic anti-surge adjusting line; operating parameters of the fan are collected in real time, and the deviation and the deviation change rate of the working condition point and the anti-surge adjusting line are calculated; and according to the deviation and the deviation change rate, the opening degree of the anti-surge valve is dynamically adjusted, and quick opening and slow closing control over the anti-surge valve is achieved. According to the method, a real-time fan surge curve and an anti-surge adjusting line can be provided along with seasonal temperature changes, the change trend of the working condition of the fan is collected, analyzed and predicted, anti-surge control output is dynamically adjusted, the operation space of the fan is enlarged, the capability of preventing the dangerous surge working condition of the blast furnace fan is improved, pressure fluctuation is stabilized while the fan is protected, and the service life of the fan is prolonged. And the ventilation amount is reduced and the loss is reduced.

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 provides a control method, a compressor and an air conditioning system. The control method comprises the following steps: constructing a rectangular coordinate system according to the relationship between the operating frequency and the operating pressure ratio of the compressor; the horizontal coordinate of the coordinate system represents the operating pressure ratio of the compressor, and the vertical coordinate of the coordinate system represents the operating frequency of the compressor; wherein the operating pressure ratio is the ratio of the condensing pressure to the evaporating pressure of the unit to which the compressor belongs; obtaining the surge line of the compressor on the coordinate system; dividing the horizontal coordinate of the coordinate system into intervals; obtaining interval anti-surge lines according to different intervals respectively, fitting the interval anti-surge lines of different intervals to form an anti-surge control line; obtaining an operating area according to the anti-surge control line; wherein the operating area is an area above the anti-surge control line on the coordinate system; and controlling the operating frequency of the compressor according to the value in the operating area. The control method of the application solves the technical problem of poor anti-surge control precision of the compressor.

The invention provides a compressor surge active prevention system based on a digital twin model and a use method, and belongs to the technical field of compressor control. The digital twinborn model building module is connected with the data acquisition and analysis module and is used for building a digital twinborn model based on the acquired parameters so as to simulate the running state of the compressor; the prediction model module is respectively connected with the data acquisition and analysis module and the digital twinborn model building module and is used for predicting the surge generation trend; the system further comprises an anti-surge control module connected with the prediction model module and the data acquisition and analysis module. According to the method, the running state of the compressor is simulated in real time by building the digital twinborn model, the surge generation trend is predicted in advance in combination with the prediction model, the control strategy combining active and passive is adopted, active prevention of surge is achieved, equipment damage is reduced, and the running stability and safety of the compressor are improved.

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.

A centrifugal compressor anti-surge prediction control method based on mechanism and data fusion belongs to the field of information technology. The anti-surge controller is designed based on the mechanism description of the Moore-Greitzer model of the centrifugal compressor, and the anti-surge response speed and stability of the centrifugal compressor are improved. On this basis, a disturbance compensation scheme based on the fusion of the predictive controller and the active disturbance rejection controller is designed to further improve the anti-disturbance performance of the centrifugal compressor. The actual case of the centrifugal compressor is verified, which shows that the method has obvious advantages in anti-disturbance performance and response speed.

A surge control system includes a rotor system with at least one compressor section and at least one turbine section operably coupled to a shaft. The surge control system also includes sensors configured to collect sensor data from the rotor system, an electric motor operably coupled to the rotor system, and a controller. The controller is operable to detect surge event from the sensor data, determine an amount of power to apply to the rotor system, and increase the amount of power provided to the rotor system to recover from the surge event.

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.

The present application relates to the technical field of synthesis gas compressors, and discloses a synthesis gas compressor system and surge control method for a synthetic ammonia plant. A second-stage separator is connected to the air inlet of the high-pressure compressor to merge the low-pressure compressor pipeline and a group of pipelines of the high-pressure compressor, and an anti-surge valve is provided between the first-stage separator and the second cooler to form a first anti-surge circuit. The two circuits share the same air inlet, outlet, and anti-surge valve, allowing the gas flow and pressure in the two pipelines to remain within a certain range. Thus, the first anti-surge valve is controlled by comprehensively considering the first-stage inlet pressure, the first-stage outlet pressure, the first-stage inlet flow, the circulating gas inlet pressure, the second-stage outlet pressure, and the second-stage inlet flow, thereby achieving the anti-surge function of the two circuits. This saves one anti-surge pipeline, thus saving one anti-surge valve, and reducing the anti-surge cost of the compressor system.

The present application is suitable for the compressor anti-surge control field, and provides a control method and device of axial flow compressor with inter-stage bleeding. In the embodiment, for the axial flow compressor with inter-stage bleeding, a start-stop control line group and a continuous operation control line group are set in advance according to the surge boundary and surge margin of the compressor. When the compressor is running, the matched control line group is determined according to the operation parameters, running state and switch state of the inter-stage bleeding valve of the compressor. Then, the valves of the compressor, such as the exhaust air supply valve, the exhaust air vent valve and the inter-stage bleeding valve, are adjusted according to the pressure ratio, equivalent speed and inlet guide vane opening of the compressor, so as to avoid the unstable operation of the compressor and the problems of possible stall or surge.

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 calibration-based turbocharger surge elimination method and system includes: shifting gears sequentially according to the vehicle's gear order; after each gear shift, sequentially accelerating the engine to a preset speed at full throttle and then rapidly releasing the throttle; using a preset mapping table of the correspondence between speed, gear, and torque filter coefficient; if surge occurs during rapid throttle release or gear shift, finding the torque filter coefficient corresponding to the preset speed at which surge occurs in the preset mapping table, and gradually reducing the torque filter coefficient according to a preset reduction benchmark until the surge is eliminated. This application eliminates the need for additional control devices, effectively reducing the complexity and cost of turbocharger surge control technology while improving the driving experience.

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.