CN-121274360-B - Full-time hot standby fault zero-attenuation air supply system and method

CN121274360BCN 121274360 BCN121274360 BCN 121274360BCN-121274360-B

Abstract

The invention discloses a full-time hot standby fault zero-attenuation air supply system and method, and relates to the technical field of air supply systems. The main fan blade and the auxiliary fan blade are connected in a decelerating manner through the decelerating and synchronizing unit, the auxiliary fan blade can rotate at a low speed along with the main fan blade when the main fan blade does not run in a fault manner, when the main fan blade breaks down or the predicted fault risk exists, the auxiliary fan blade does not need to start to rapidly increase the rotating speed from a static state, the problem that the auxiliary fan blade starts to stably supply air when the traditional double-fan set is switched is avoided, the air flow barrier of a scene is ensured not to be damaged, the air supply environment of a target area is ensured to be stable, and meanwhile the auxiliary fan blade synchronously rotates and stands by through the main fan blade, so that independent energy supply driving is not needed in the standby process of the auxiliary fan blade, the energy-saving standby effect of the system is realized, and the problem that the traditional double-fan is simultaneously started and consumes energy is reduced.

Inventors

LIU SHUANQIANG
HE QIANGYONG
HU XUNMAN
WANG WENNAN
XIAO HAO

Assignees

格瑞海思人居环境科技(江苏)有限公司

Dates

Publication Date: 20260505
Application Date: 20250926

Claims (8)

1. The full-time hot standby fault zero-attenuation air supply system is characterized by comprising a main fan blade, an auxiliary fan blade, a speed reduction synchronization unit, a switching control module, a risk prediction module, an air supply pressurizing module and an emergency standby unit; The main fan blade and the auxiliary fan blade are in the same specification, and are arranged in two pipelines of the air supply system up and down and used for supplying air to the air supply system; The speed reduction synchronization unit is used for mutually connecting the main fan blade and the auxiliary fan blade in a transmission way, the auxiliary fan blade synchronously rotates along with the main fan blade, the rotating speed is one fourth of the rotating speed of the main fan blade, and when the main fan blade breaks down or the risk prediction module predicts that the risk of the fault exists, the switching control module switches the main fan blade into the auxiliary fan blade for air supply; The switching control module is used for switching and starting the auxiliary fan blade to the highest rotating speed for blowing when the main fan blade fails or the risk prediction module predicts the failure risk, stopping the main fan blade from blowing, and synchronously disconnecting the deceleration synchronization unit; the risk prediction module is used for predicting the failure of the air supply system, adopts a double prediction model, wherein the double prediction model is a fusion time sequence characteristic model and a physical mechanism model, and when the failure of the main fan blade is predicted, the risk prediction module sends predicted information to the switching control module so as to enable the main fan blade and the auxiliary fan blade to perform air supply switching; The air supply pressurizing module is used for switching air supply by the switching control module when the main fan blade fails, and increasing air supply pressure in the pipeline for the starting stage of the auxiliary fan blade; the emergency standby unit is used for releasing high-pressure air if the starting of the auxiliary fan blade is delayed when the main fan blade fails and the switching control module switches the auxiliary fan blade to send air, and stopping running after the auxiliary fan blade is successfully started; The air supply pressurizing module comprises an electric pressurizing valve, a pressure feedback sensor and a pressurizing controller; The electric booster valve is connected in series with the pipeline outlet position of the auxiliary fan blade and is used for boosting the air supply of the pipeline when the auxiliary fan blade takes over the air supply of the main fan blade when the main fan blade fails; The pressure feedback sensor is integrated in the electric pressure increasing valve and is used for detecting the wind pressure of the wind outlet position corresponding to the pipeline when the auxiliary fan blade is started, feeding back the information of insufficient wind pressure of the wind to the pressure increasing controller if the wind pressure of the wind is lower than a set wind pressure threshold value of the wind, and not feeding back any information to the pressure increasing controller if the wind pressure of the wind is higher than the wind pressure threshold value; The supercharging controller is integrated in the electric supercharging valve and is used for receiving the information of insufficient air supply pressure fed back by the pressure feedback sensor, and sending a starting instruction to the electric supercharging valve after receiving the information so that the electric supercharging valve starts to supercharge the air supply of the auxiliary fan blade; The step of the risk prediction module for performing continuous fault prediction on the main fan blade and the auxiliary fan blade comprises the following steps: radial vibration signals of the main fan blade and the auxiliary fan blade are collected, a hot wire anemometer is arranged on the section of the air outlet position of the pipeline, turbulent pulse frequency and speed distribution uniformity of air flow at the air outlet position of the main fan blade and the auxiliary fan blade are collected, and instantaneous rotation speed fluctuation values of the main fan blade and the auxiliary fan blade are collected to obtain prediction collection data; The prediction acquisition data adopts Kalman filtering and rotation period filtering to remove the vibration of a driving mechanism of the main fan blade and the auxiliary fan blade and the air flow disturbance interference of the pipeline, eliminates the sensor instantaneous disturbance data for detection by comparing a normal distributed 3 sigma criterion with a plurality of adjacent rotation periods, and carries out data normalization processing on the preprocessed vibration peak value, air flow uniformity and rotation speed fluctuation to obtain processing data; Extracting time sequence features and physical mechanism features from the processed data, importing the extracted time sequence features and the extracted physical mechanism features into the double-prediction model, and calculating fault comprehensive risk values of the main fan blade and the auxiliary fan blade according to 60% of the weight of the physical mechanism features and 40% of the weight of the time sequence features; when the comprehensive risk value is smaller than a set risk threshold, judging that the main fan blade and the auxiliary fan blade are normal, and when the comprehensive risk value is larger than the set risk threshold but smaller than a fault triggering threshold, triggering abnormal early warning of the main fan blade and the auxiliary fan blade, and when the comprehensive risk value is larger than the fault triggering threshold, judging that the main fan blade and the auxiliary fan blade have faults; if the main fan blade is predicted to have a fault, the fault information is transmitted to the switching control module, the switching control module switches the main fan blade and the auxiliary fan blade to supply air according to the fault condition, and if the auxiliary fan blade is predicted to have a fault, a fault alarm is sent to remind timely maintenance.
2. The full-time hot standby fault zero-attenuation air supply system according to claim 1, wherein the air supply system is composed of two pipelines which are connected in parallel up and down, the upper pipeline is the installation position of the main fan blade, the lower pipeline is the installation position of the auxiliary fan blade, the output port and the input port of the lower pipeline are communicated with the bottom of the upper pipeline, and electromagnetic check valves are arranged at the communication positions.
3. The full-time hot standby fault zero-attenuation air supply system is characterized in that the main fan blade and the auxiliary fan blade are respectively provided with a servo motor for driving, the specifications of the two servo motors are consistent, the center positions of the other sides of the main fan blade and the auxiliary fan blade, which are far away from the servo motors, are respectively and correspondingly provided with a pinion and a gear wheel, the time of one rotation of the gear wheel is four times of the time of one rotation of the pinion, and the gear belt is sleeved outside the gear wheel and the pinion for transmission.
4. The full-time hot standby fault zero-attenuation air supply system according to claim 3, wherein an electromagnetic separation unit is arranged between the pinion and the auxiliary fan blade and is used for disconnecting the auxiliary fan blade from the pinion when the main fan blade fails and the electromagnetic separation unit is powered off when the rotating speed of the auxiliary fan blade reaches a preset rotating speed.
5. The full-time hot standby fault zero attenuation air supply system according to claim 1, wherein the emergency standby unit comprises a high-pressure air storage component, an air supplementing control component and a release adjusting component; the high-pressure air storage component is used for storing high-pressure clean air and comprises a 304 stainless steel high-pressure air storage tank; The air supplementing control assembly comprises an air compressor, an input port of the air compressor is connected to an air inlet end of the air supply system through a connecting pipe, and an output port of the air compressor is communicated with the high-pressure air storage tank through a filter and a one-way check valve and is used for maintaining stable pressure in the air storage tank; The release adjusting component is used for controlling the release flow and the air flow stability of high-pressure air and consists of an electromagnetic proportional release valve and an air flow stabilizer, and the release adjusting component is communicated with the corresponding pipeline of the auxiliary fan blade.
6. A full-time hot standby fault zero-attenuation air supply method, which is applied to the full-time hot standby fault zero-attenuation air supply system as claimed in any one of claims 1 to 5, and is characterized by comprising the following steps: The main fan blades rotate in the corresponding pipelines to supply air, and the auxiliary fan blades and the main fan blades synchronously rotate at a low speed through the speed reduction synchronization unit; The risk prediction module is used for continuously predicting faults of the main fan blade and the auxiliary fan blade in the rotating process of the main fan blade and the auxiliary fan blade, and when the fault prediction result is that the main fan blade has fault risks, the fault risks are sent to the switching control module; the switching control module receives the fault risk detected by the risk prediction module, reduces the rotating speed of the main fan blade, and simultaneously increases the rotating speed of the auxiliary fan blade to supply air; If the air pressure of the air supply of the auxiliary fan blade is lower than the air pressure of the air supply required by the auxiliary fan blade, the air supply pressurizing module starts and promotes the air outlet pressure of the pipeline corresponding to the auxiliary fan blade, and the air supply pressurizing module stops pressurizing when the air supply pressure of the auxiliary fan blade is stable.
7. The method of zero attenuation air supply in full time due to hot standby fault of claim 6, wherein when the rotational speed of the auxiliary fan blade is increased, the rotational speed of the auxiliary fan blade does not reach a preset rotational speed within a set time, and the emergency standby unit is started at this time, and the emergency standby unit increases the air supply pressure of the pipeline by spraying high-pressure air; and after the rotating speed of the auxiliary fan blade reaches the set rotating speed, stopping continuously spraying high-pressure air by the emergency standby unit, and recharging the air into the emergency standby unit and simultaneously pressurizing and storing.
8. The method of zero attenuation air supply in full time due to hot standby fault of claim 6, wherein the switching control module reduces the rotation speed of the main fan blade, and when the rotation speed of the auxiliary fan blade is increased, the rotation speed reduction rate of the main fan blade is the same as the rotation speed increase rate of the auxiliary fan blade, and when the rotation speed of the auxiliary fan blade reaches half of the rated rotation speed, the deceleration synchronization units of the main fan blade and the auxiliary fan blade fail and are released.

Description

Full-time hot standby fault zero-attenuation air supply system and method Technical Field The invention relates to the technical field of air supply systems, in particular to a full-time hot standby fault zero-attenuation air supply system and method. Background The air supply system is used for mechanically conveying air in a specific state (such as temperature, humidity and cleanliness) to a target area according to requirements so as to meet ventilation, cooling, heating, cleaning or technological air supply requirements, and is widely applied to civil buildings (such as houses, markets and office buildings), industrial plants, medical places, data centers and various special equipment, and the core aim is to maintain the air environment of the target area stable or meet specific technological requirements; In order to ensure stable air supply in an air supply space, the conventional air supply system adopts a double-fan set mode to switch fans when coping with faults, one fan is a main fan blade, the other fan blade is an auxiliary fan blade, when the main fan blade fails in the operation process, the auxiliary fan blade is started immediately to replace the main fan blade to supply air, but in the switching process of the two fans, the auxiliary fan blade needs a few seconds from the starting to the stable air supply process, the air supply system possibly generates air supply attenuation for a few seconds in the process, short-time air supply interruption is caused, for example, a clean type factory building needs to maintain constant cleanliness and air flow speed, the air supply attenuation can damage the air flow barrier of a clean area, and the introduced pollutants lead to scrapping of products. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a full-time hot standby fault zero-attenuation air supply system and a method, and solves the problems in the background art. The invention aims at realizing the aim by adopting the technical scheme that the full-time hot standby fault zero-attenuation air supply system comprises a main fan blade, an auxiliary fan blade, a speed reduction synchronization unit, a switching control module, a risk prediction module, an air supply pressurizing module and an emergency standby unit; The main fan blade and the auxiliary fan blade are in the same specification, and are arranged in two pipelines of the air supply system up and down and used for supplying air to the air supply system; The speed reduction synchronization unit is used for mutually connecting the main fan blade and the auxiliary fan blade in a transmission way, the auxiliary fan blade synchronously rotates along with the main fan blade, the rotating speed is one fourth of the rotating speed of the main fan blade, and when the main fan blade breaks down or the risk prediction module predicts that the risk of the fault exists, the switching control module switches the main fan blade into the auxiliary fan blade for air supply; The deceleration synchronization unit can enable the main fan blade and the auxiliary fan blade to synchronously operate in the daily operation process, the auxiliary fan blade does not need to be driven by independent energy equipment in the daily standby process, and no energy consumption is realized in the daily standby process of the auxiliary fan blade only through the connection with the main fan blade in a deceleration synchronization mode, so that the operation energy consumption of the air supply system is reduced, and the energy-saving operation effect of the air supply system is realized; The switching control module is used for switching and starting the auxiliary fan blade to the highest rotating speed for blowing when the main fan blade fails or the risk prediction module predicts the failure risk, stopping the main fan blade from blowing, and synchronously disconnecting the deceleration synchronization unit; the risk prediction module is used for predicting the failure of the air supply system, adopts a double prediction model, wherein the double prediction model is a fusion time sequence characteristic model and a physical mechanism model, and when the failure of the main fan blade is predicted, the risk prediction module sends predicted information to the switching control module so as to enable the main fan blade and the auxiliary fan blade to perform air supply switching; The air supply pressurizing module is used for switching air supply by the switching control module when the main fan blade fails, and increasing air supply pressure in the pipeline for the starting stage of the auxiliary fan blade; the emergency standby unit is used for releasing high-pressure air when the main fan blade fails and the switching control module switches the auxiliary fan blade to send air if the auxiliary fan blade is delayed in starting, and stopping running after the auxiliary fan blade is successfully started. Preferably, the air supply sys