An intelligent air compressor unit system based on dynamic phase compensation and its control method

Abstract

The present invention relates to an intelligent air compressor unit system based on dynamic phase compensation and its control method. The present invention effectively solves the problems that the existing multi-unit air compression system is prone to cause main pipe vibration, the wear difference rate between units is high, it is not convenient to balance the service life of each device, and it is difficult to meet the requirements of continuous production; the technical solutions include: the intelligent air compressor unit system based on dynamic phase compensation can effectively reduce the main pipe pressure volatility through the star-shaped phase difference main pipe structure combined with adjustable bellows dynamic adjustment, and can absorb specific frequency vibrations in combination with the Helmholtz resonance cavity to prevent loosening at the pipe connection and cause equipment failures; the equivalent operation time model can balance the service life of each device and make the overall air compressor unit operate for a longer time; the cross-unit gas volume compensation mechanism can ensure the continuity of emergency gas supply, avoid large pressure fluctuations when switching to standby units and affect continuous gas supply, and make the air compressor unit provide a more stable gas output for the front-end equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of air compressor systems, and particularly to an intelligent air compressor unit system based on dynamic phase compensation and a control method thereof. Background Art

[0002] Among the many energy sources in use, compressed air is one of the most popular energy sources after electricity. It has increasingly wide applications in industries, mining, engineering, medical, and even agriculture, especially in the industrial sector where the usage is quite substantial. Given that compressed air has been widely adopted in all walks of life, with the premise of large-scale and automation in factories, the use of compressed air is increasing day by day. While an air compressor produces energy / compressed air, it also consumes a large amount of electrical energy itself. Taking a common 100 PsiG (7 Kg / cm3G) compressed air system as an example, it takes about 20 HP of electrical energy to produce 100 CFM of compressed air. In the current industrial world, there are already many factories that use air compressors with thousands or even tens of thousands of horsepower. How to reasonably use compressed air and how to ensure the long-term stable operation of air compressors have become very important topics for industry players.

[0003] The existing multi-unit air compressor systems generally have the following technical defects:

[0004] (1) Pressure fluctuation problem: When multiple air compressors operate in parallel, the pressure pulsations are superimposed, resulting in severe vibration of the main pipe, causing cracks in the pipeline welds and failures of downstream equipment;

[0005] (2) Uneven equipment life: The traditional load distribution strategy does not consider the coupled effects of the polluted environment and operation time, resulting in a relatively high wear difference rate between units, making it inconvenient to balance the service life of each device;

[0006] (3) Fault response lag: When switching to a standby unit after a device failure, there is a high risk of gas supply interruption, making it difficult to meet the continuous production requirements.

[0007] In view of the above, we provide an intelligent air compressor unit system based on dynamic phase compensation and a control method thereof to solve the above problems. Summary of the Invention

[0008] In view of the above situation, the present invention provides an intelligent air compressor unit system based on dynamic phase compensation and a control method thereof.

[0009] An intelligent air compressor unit system based on dynamic phase compensation includes:

[0010] Three groups of parallel air compressor units, each group including:

[0011] An anti-pollution intake air treatment module;

[0012] An air compressor body, the outlet of which is connected to a pneumatic valve group;

[0013] A buffer gas storage tank, connected to the outlet of the air compressor body through a pipeline;

[0014] An adsorption dryer, connected to the outlet of the buffer gas storage tank through a pipeline;

[0015] Star-shaped phase difference main pipe structure:

[0016] Three branch pipes are symmetrically distributed at 120° with the center of the main pipe as the origin, and the length difference of the branch pipes is 1 / (4n) of the pressure wave wavelength, where n is an odd number;

[0017] An adjustable bellows is integrated in the middle of each branch pipe;

[0018] Dynamic regulation unit:

[0019] A redundant pressure sensor group, installed at key nodes of the main pipe;

[0020] A dew point sensor group, distributed at the outlet of the main pipe and the adsorption dryer;

[0021] A central controller, communicatively connected to the pressure sensor group, the dew point sensor group and the actuator.

[0022] Preferably, the anti-pollution intake air treatment module includes a filter chamber that can be quickly disassembled and replaced. A three-stage filtering mechanism for fully filtering the inhaled gas is arranged inside the filter chamber, and a differential pressure sensor for monitoring the differential pressure inside the filter chamber is fixedly installed on the side of the filter chamber.

[0023] Preferably, the length difference of the branch pipes of the star-shaped phase difference main pipe structure satisfies:

[0024] ΔL = λ / (4n), where λ is the pressure wave wavelength and n is an odd number sequence of 1, 3, 5...;

[0025] Helmholtz resonance cavities are arranged on the outer wall of the main pipe at intervals of 50 cm, and the cavity volume matches the target frequency.

[0026] Preferably, the adjustable bellows is driven by a servo motor to drive a ball screw to achieve expansion and contraction. The flanges at both ends of the adjustable bellows are respectively fixedly connected to the fixed end and the movable end of the branch pipe, and a plug is fixedly connected to one side of the movable end. The plug is inserted into the branch pipe and slides inside it.

[0027] Preferably, the pressure sensor group on the main pipe adopts a redundant configuration, with at least 3 pressure sensors. A dew point sensor is independently set at the outlet of each adsorption dryer. After data fusion, the accuracy is: the pressure measurement error ≤ ±0.2% FS, and the dew point temperature error ≤ ±1°C.

[0028] Preferably, the adsorption dryer adopts a two-tower adsorption structure, and the switching period ≤ 30 seconds.

[0029] Preferably, the dynamic regulation unit includes edge computing nodes deployed in each air compressor unit for preprocessing vibration and temperature data, a central controller with an equivalent operating time database and a fault feature library built in, and a local control panel integrating an audible and visual alarm and a virtual load test function.

[0030] Preferably, the pneumatic valve group includes a pneumatic butterfly valve with a response time of ≤ 0.3 seconds, and also includes a check valve to prevent gas backflow. Both the pneumatic butterfly valve and the check valve are sealed using magnetorheological fluid technology.

[0031] Preferably, bypass pipelines are connected between the buffer gas storage tanks in adjacent units of the three groups of parallel air compressor units, and adjacent buffer gas storage tanks are interconnected through the bypass pipelines. A proportional regulating valve is provided on the bypass pipelines to support gas volume allocation across units.

[0032] A control method for an intelligent air compressor unit based on dynamic phase compensation includes the following steps:

[0033] I. Pressure balance control:

[0034] Monitor the main pipe pressure in real time. If it is lower than 0.65 MPa, start the standby unit in ascending order of equivalent operating time;

[0035] If it is higher than 0.75 MPa, shut down the unit in descending order of equivalent operating time;

[0036] II. Life balance control:

[0037] Dynamically calculate the equivalent operating time;

[0038] Generate a priority queue every 6 hours and preferentially start the low-load unit;

[0039] III. Phase difference compensation:

[0040] Identify the main frequency of the main pipe pressure fluctuation and adjust the length of the adjustable bellows to offset the vibration;

[0041] Verify that the fluctuation amplitude ≤ ±0.5%, otherwise readjust;

[0042] IV. Dew point temperature control:

[0043] If the dew point > -35 °C, shorten the regeneration cycle of the adsorption dryer and increase the temperature;

[0044] If the dew point < -50 °C, extend the regeneration cycle and decrease the temperature;

[0045] V. Fault self-healing response:

[0046] After detecting a fault, isolate the faulty unit, start the standby unit, control the buffer gas storage tank of the faulty unit to enter the emergency gas supply mode, and supply gas to adjacent units through the bypass pipeline;

[0047] Adjust the load of adjacent units and the length of the adjustable bellows to maintain stable pressure.

[0048] The beneficial effects of the above technical solutions are as follows:

[0049] The intelligent air compressor unit system based on dynamic phase compensation can effectively reduce the pressure fluctuation rate of the main pipe through the star-shaped phase difference main pipe structure combined with the dynamic adjustment of the adjustable bellows, and can absorb specific frequency vibrations by setting the Helmholtz resonance cavity, thereby reducing the vibration of the main pipe and preventing loosening at the pipe joints and causing equipment failures; the equivalent operation time model combines the load rate, pollution level and historical data, greatly reducing the difference rate of the unit life, and automatically rotating the unit priority every once in a while, which can avoid long-term high-load operation of a single machine, balance the service life of each device, and enable the overall air compressor unit to operate for a longer time; and when the unit equipment fails, it can quickly complete the shutdown of the faulty equipment and the switching of the standby unit. At the same time, it also has a cross-unit gas volume compensation mechanism, which can ensure the continuity of emergency gas supply, avoid large pressure fluctuations during the process of switching to the standby unit and affecting continuous gas supply, and enable the air compressor unit to provide a more stable gas output for the front-end equipment and ensure the stable operation of the equipment. Description of the Drawings

[0050] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0051] Figure 2 It is a schematic diagram of the anti-pollution air intake treatment module of the present invention;

[0052] Figure 3 It is a schematic diagram of the sectional state of the filter bin of the present invention;

[0053] Figure 4 It is a schematic diagram of the adjustable bellows of the present invention;

[0054] Figure 5 It is a schematic diagram of the overall process of the control press system of the present invention;

[0055] Figure 6 It is a schematic diagram of the anti-pollution air intake linkage control process of the present invention;

[0056] Figure 7 It is a schematic diagram of the fault self-healing process of the present invention;

[0057] Figure 8 It is a schematic diagram of the life balance algorithm of the present invention;

[0058] Figure 9 It is a schematic diagram of the visualization architecture of the present invention.

[0059] In the figure: 1. Air compressor body; 2. Buffer gas storage tank; 3. Adsorption dryer; 4. Branch pipe; 5. Main pipe; 6. Adjustable bellows; 7. Filter chamber; 8. Three-stage filtering mechanism; 9. Differential pressure sensor; 10. Helmholtz resonance cavity; 11. Servo motor; 12. Ball screw; 13. Insertion pipe; 14. Pressure sensor; 15. Dew point sensor; 16. Pneumatic butterfly valve; 17. Check valve; 18. Bypass pipeline; 19. Proportional regulating valve; 20. Intake pipe; 21. Electric cylinder; 22. Sealing plate. Specific embodiments

[0060] Regarding the foregoing and other technical contents, features and effects of the present invention, they can be clearly presented in the following detailed description of the embodiments in conjunction with the attached Figures 1 to 9 drawings. The structural contents mentioned in the following embodiments are all referenced to the drawings of the specification.

[0061] This embodiment provides an intelligent air compressor unit system based on dynamic phase compensation and its control method. As shown in the attached Figures 1-9 drawings, it includes three groups of parallel air compressor units, a star-shaped phase difference main pipe structure and a dynamic regulation unit. Each group of air compressor units includes:

[0062] An anti-pollution intake air treatment module. The anti-pollution intake air treatment module includes a filter chamber 7 that can be quickly disassembled and replaced. Inside the filter chamber 7, there is a three-stage filtering mechanism 8 that can fully filter the inhaled gas. The three-stage filtering mechanism 8 can be divided into a primary filter layer (the first layer), a middle filter layer (the second layer) and a high-efficiency filter layer (the third layer). The primary filter layer can adopt a stainless steel screen and synthetic fiber non-woven fabric. The stainless steel screen is corrosion-resistant, can be cleaned and reused, has relatively large pores (50–100μm), and is mainly used to intercept large particle impurities (such as sand grains, fibers, insects, etc.). The synthetic fiber non-woven fabric has a low cost and a high dust capacity, and the filtration accuracy is about 10–50μm. It is suitable for initially blocking dust and coarse particles, can protect the subsequent filter layers from the impact of large particles, and extend the service life of the medium and high-efficiency filter materials;

[0063] The middle filter layer can adopt glass fiber filter material and electrostatic cotton / meltblown cloth. The fiber diameter of the glass fiber filter material is fine (1–10μm), and the filtration accuracy is 1–10μm. It can capture pollen, fine dust and part of the oil mist. The electrostatic cotton / meltblown cloth can capture 0.5–5μm particles through electrostatic adsorption, has a high dust capacity and a moderate pressure drop. It can further remove medium-sized pollutants, reduce the burden on the high-efficiency filter layer, prevent tiny particles from entering the air compressor rotor or cylinder, and reduce wear;

[0064] The high-efficiency filter layer can adopt a composite structure of HEPA filter paper (high-efficiency particulate air filter material), activated carbon composite filter layer and nanofiber membrane. The filtration accuracy of the HEPA filter paper (high-efficiency particulate air filter material) is 0.3μm (efficiency ≥ 99.97%), which can intercept bacteria, soot and ultrafine particles; the activated carbon composite filter layer can adsorb oil mist, odor and volatile organic compounds (VOCs), and is suitable for environments containing oil pollution; the nanofiber membrane can achieve 0.01μm particle filtration under ultra-low resistance and is applicable to ultra-clean scenarios (such as the semiconductor industry); at the same time, the filter chamber 7 can be quickly taken out and replaced from the intake pipe 20 to improve the replacement efficiency of the filter chamber 7, and the interface between the filter chamber 7 and the intake pipe 20 can adopt a self-sealing interface to ensure zero leakage at the interface. The three-stage filtration mechanism 8 can ensure that the cleanliness of the output air meets the standard, protecting the buffer gas storage tank 2, adsorption dryer 3 and backend equipment from oil pollution and particulate contamination.

[0065] A differential pressure sensor 9 for monitoring the differential pressure inside the filter chamber 7 is fixedly installed on the side of the filter chamber 7. The differential pressure sensor 9 can monitor the clogging state of the filter material in real time and predict the replacement cycle. An intake pipe 20 for air extraction is fixedly installed on the top of the air compressor unit. The number of anti-pollution intake treatment modules is two, and the two anti-pollution intake treatment modules are arranged in parallel and penetrate inside the bottom end of the intake pipe 20, with one of them used as a backup. A blocking mechanism for adjusting the anti-pollution intake treatment module is arranged on the side of the intake pipe 20. The blocking mechanism includes an electric cylinder 21 and a blocking plate 22. The blocking plate 22 is fixedly connected to the end of the movable rod body of the electric cylinder 21 and penetrates inside the intake pipe 20, and the blocking plate 22 can completely block one of the filter chambers 7; when the air compressor unit operates normally, the gas only enters the air compressor through one of the filter chambers 7. Two differential pressure sensors 9 are fixedly installed on the side of each filter chamber 7, and the two differential pressure sensors 9 correspond to the adjacent two filter plates respectively, and can monitor the pressure difference between each filter plate of the filter chamber 7 in real time through the differential pressure sensors 9. When the pressure difference is too large, it proves that the filter element of the current anti-pollution treatment module is seriously polluted, affecting the intake efficiency. Therefore, the central controller can control the movable rod body of the electric cylinder 21 to drive the blocking plate 22 to move and switch to the backup filter chamber 7, so as to ensure the effective filtration of the gas and normal air intake at the same time, without affecting the normal operation of the air compressor unit.

[0066] The air compressor body 1 has an outlet connected to a pneumatic valve group. The pneumatic valve group includes a pneumatic butterfly valve 16. The response time of the pneumatic butterfly valve 16 is ≤ 0.3 seconds. It also includes a check valve 17 that can prevent gas backflow. Both the pneumatic butterfly valve 16 and the check valve 17 are sealed using magnetorheological fluid technology;

[0067] The buffer gas storage tank 2 is connected to the outlet of the air compressor body 1 through a pipeline. There is a bypass pipeline 18 connecting the buffer gas storage tanks 2 in adjacent units of the three groups of parallel air compressor units, and the adjacent buffer gas storage tanks 2 are interconnected through the bypass pipeline 18. A proportional regulating valve 19 is provided on the bypass pipeline 18 to support cross-unit gas volume allocation. When the pressure of the buffer gas storage tank 2 < 0.65 MPa, start the air compressor of this group and preferentially load it to 80% capacity. When the pressure > 0.75 MPa, turn off the air compressor and switch to the gas supply mode of the buffer gas storage tank 2. When a failure occurs in one of the air compressor units, the proportional regulating valve 19 of the bypass pipeline 18 of the buffer gas storage tank 2 of this unit is opened, so that the gas stored in the buffer gas storage tank 2 of this unit can supply gas to the standby unit, thereby ensuring that the pressure of the main pipe 5 remains stable during the switching process;

[0068] The adsorption dryer 3 is connected to the outlet of the buffer gas storage tank 2 through a pipeline. The adsorption dryer 3 adopts a two-tower adsorption structure, and the switching period ≤ 30 seconds;

[0069] One of the air compressors in the three groups of parallel air compressor units is a variable-frequency air compressor, and the load rate is continuously adjustable from 30% to 100%. If the gas flow required by the main pipe 5 is not enough to operate multiple air compressor units, the variable-frequency air compressor can be preferentially operated. The variable-frequency air compressor can dynamically adjust its own operating power according to the load state, and can reduce energy consumption when the demand is low.

[0070] The three branch pipes 4 of the star-shaped phase difference main pipe structure are symmetrically distributed at 120° with the center of the main pipe 5 as the origin. The length difference of the branch pipes 4 is 1 / (4n) of the pressure wave wavelength, where n is an odd number; the length difference of the branch pipes 4 of the star-shaped phase difference main pipe structure satisfies: ΔL = λ / (4n), where λ is the pressure wave wavelength and n is an odd number sequence of 1, 3, 5...

[0071] Helmholtz resonance cavities 10 are arranged on the outer wall of the main pipe 5 at intervals of 50 cm. The cavity volume is matched with the target frequency, which can effectively absorb the vibration of the main pipe 5. The branch pipes 4, the main pipe 5 and all the connecting pipelines in the air compressor unit are fixed on the wall or the ground through pipeline supports, which can firmly support the pipelines;

[0072] Each middle part of the branch pipe 4 is integrated with an adjustable corrugated pipe 6. The adjustable corrugated pipe 6 is driven by a servo motor 11 to drive a ball screw 12 to realize telescoping. The flanges at both ends of the adjustable corrugated pipe 6 are respectively fixedly connected to the fixed end and the movable end of the branch pipe 4, and an insertion pipe 13 is fixedly connected to one side of the movable end. The insertion pipe 13 is arranged inside the branch pipe 4 and slides inside it. The servo motor 11 is fixedly installed outside the branch pipe 4 through a fixing frame, and the ball screw 12 is arranged on the side surfaces of the flanges at both ends of the adjustable corrugated pipe 6. A laser distance sensor can be installed at the movable end of the adjustable corrugated pipe 6 to monitor the telescoping amount of the adjustable corrugated pipe 6 in real time through the laser distance sensor; the pressure wave is generated by the periodic exhaust of the air compressor. The adjustable corrugated pipe 6 changes the propagation path length through telescoping to adjust the phase difference.

[0073] The insertion pipe 13 at the movable end of the adjustable corrugated pipe 6 is arranged inside the branch pipe 4 close to it. The movable end of the adjustable corrugated pipe 6 is connected to the outside of the ball screw 12 through a ball nut. The rotation of the ball screw 12 driven by the servo motor 11 can drive the movable end of the adjustable corrugated pipe 6 to move horizontally, so as to adjust its telescoping amount. The insertion pipe 13 can ensure the connection and sealing between the branch pipe 4 and the adjustable corrugated pipe 6. When it is necessary to adjust the effective telescoping amount of the adjustable corrugated pipe 6, the servo motor 11 is controlled to drive the ball screw 12 to rotate, driving the movable end of the adjustable corrugated pipe 6 to move in the direction that needs to be adjusted, so as to facilitate adjusting the length of the adjustable corrugated pipe 6 according to the vibration condition of the main pipe 5, effectively reducing the pipeline vibration, ensuring the stable connection between pipelines, and preventing the pipelines from loosening and increasing the maintenance cost.

[0074] The dynamic regulation unit includes a redundant pressure sensor group installed at the key nodes of the main pipe 5, a dew point sensor group distributed at the outlets of the main pipe 5 and the adsorption dryer 3, and a central controller communicatively connected to the pressure sensor group, the dew point sensor group and the actuator. The pressure sensor group on the main pipe 5 adopts a redundant configuration, with at least 3 pressure sensors 14. A dew point sensor 15 is independently set at the outlet of each adsorption dryer 3. After data fusion, the accuracy is: the pressure measurement error ≤ ±0.2%FS, and the dew point temperature error ≤ ±1°C.

[0075] The dynamic regulation unit also includes edge computing nodes deployed in each air compressor unit and used for preprocessing vibration and temperature data. The edge computing nodes can process data in real time, a central controller with an equivalent operating time database and a fault feature library built in. The central controller performs multi-objective optimization, and a local control panel integrating an audible and visual alarm and a virtual load test function.

[0076] A control method for an intelligent air compressor unit based on dynamic phase compensation includes the following steps:

[0077] I. Pressure balance control:

[0078] The pressure of the main pipe 5 is monitored in real time through the pressure sensor 14, and the target is to maintain 0.7 ± 0.05 MPa. If the pressure is lower than 0.65 MPa, the unit with the shortest equivalent operation time is preferentially started; if it is still insufficient, other units are loaded in ascending order of operation time; if the pressure is higher than 0.75 MPa, the units are unloaded in descending order of operation time; to avoid single-unit overload and extend the equipment life;

[0079] II. Life balance control:

[0080] The equivalent operation time is dynamically calculated by the central controller;

[0081] A priority queue is generated every 6 hours, and the low-load units are preferentially started; to extend the overall system life and reduce the loss of unplanned shutdowns;

[0082] III. Phase difference compensation:

[0083] Identify the main frequency of the pressure fluctuation of the main pipe 5, and adjust the length of the adjustable bellows 6 to offset the vibration;

[0084] Verify that the fluctuation amplitude ≤ ±0.5%, otherwise readjust; it can effectively reduce the pipeline vibration and improve the pressure uniformity of the main pipe 5;

[0085] IV. Dew point temperature control:

[0086] If the dew point > -35°C, shorten the regeneration cycle of the adsorption dryer 3 and increase the temperature;

[0087] If the dew point < -50°C, extend the regeneration cycle and reduce the temperature; it can control the dew point control accuracy within ±3°C, avoid excessive gas drying, and at the same time reduce the energy consumption of the adsorption dryer 3;

[0088] V. Fault self-healing response:

[0089] After a fault is detected, isolate the faulty unit, start the standby unit, control the buffer gas storage tank 2 of the faulty unit to enter the emergency gas supply mode, and supply gas to adjacent units through the bypass pipeline 18;

[0090] Adjust the load of adjacent units and the length of the adjustable bellows 6 to maintain pressure stability; it can effectively ensure the continuity and stability of the air compressor unit's gas supply, and greatly reduce the scope of the fault impact, ensuring the normal and stable operation of other equipment.

[0091] The above description is only for the purpose of illustrating the present invention. It should be understood that the present invention is not limited to the above embodiments, and various flexible forms that conform to the idea of the present invention are within the protection scope of the present invention.

Claims

1. An intelligent air compressor unit system based on dynamic phase compensation, characterized in that Comprising: Three groups of parallel air compressor units, each group comprising: An anti-pollution intake air treatment module; An air compressor body (1), the outlet of which is connected to a pneumatic valve group; A buffer gas storage tank (2), which is connected to the outlet of the air compressor body (1) through a pipeline; An adsorption dryer (3), which is connected to the outlet of the buffer gas storage tank (2) through a pipeline; A star phase difference main pipe structure: Three branch pipes (4) are symmetrically distributed at 120° with the center of the main pipe (5) as the origin, and the length difference of the branch pipes (4) is 1 / (4n) of the pressure wave wavelength, where n is an odd number; An adjustable corrugated pipe (6) is integrated in the middle of each branch pipe (4); A dynamic regulation unit: A redundant pressure sensor group, installed at key nodes of the main pipe (5); A dew point sensor group, distributed at the outlet of the main pipe (5) and the adsorption dryer (3); A central controller, which is communicatively connected to the pressure sensor group, the dew point sensor group and the actuator.

2. The intelligent air compressor unit system based on dynamic phase compensation according to claim 1, wherein The anti-pollution intake air treatment module includes a filter chamber (7) that can be quickly disassembled and replaced. A three-stage filtering mechanism (8) for fully filtering the inhaled gas is arranged inside the filter chamber (7), and a differential pressure sensor (9) for monitoring the differential pressure inside the filter chamber (7) is fixedly installed on the side of the filter chamber (7).

3. The intelligent air compressor unit system based on dynamic phase compensation according to claim 1, wherein The length difference of the branch pipes (4) of the star phase difference main pipe structure satisfies: ΔL = λ / (4n), where λ is the pressure wave wavelength and n is an odd number sequence of 1, 3, 5...; Helmholtz resonance cavities (10) are arranged on the outer wall of the main pipe (5) at intervals of 50 cm, and the cavity volume matches the target frequency.

4. An intelligent air compressor unit system based on dynamic phase compensation according to claim 1, characterized in that, The adjustable corrugated pipe (6) is driven by a servo motor (11) to drive a ball screw (12) to achieve expansion and contraction. The flanges at both ends of the adjustable corrugated pipe (6) are respectively fixedly connected to the fixed end and the movable end of the branch pipe (4), and a plug pipe (13) is fixedly connected to one side of the movable end. The plug pipe (13) is arranged inside the branch pipe (4) and slides inside it.

5. The intelligent air compressor unit system based on dynamic phase compensation according to claim 1, characterized in that, The pressure sensor group on the main pipe (5) adopts a redundant configuration, with at least 3 pressure sensors (14). A dew point sensor (15) is independently arranged at the outlet of each adsorption dryer (3). After data fusion, the accuracy is: the pressure measurement error ≤ ±0.2% FS, and the dew point temperature error ≤ ±1°C.

6. The intelligent air compressor unit system based on dynamic phase compensation according to claim 1, wherein, The adsorption dryer (3) adopts a two-tower adsorption structure, and the switching period ≤ 30 seconds.

7. An intelligent air compressor unit system based on dynamic phase compensation according to claim 1, characterized in that, The dynamic regulation unit includes an edge computing node deployed in each air compressor unit and used for preprocessing vibration and temperature data, a central controller with an internal equivalent operation time database and a fault feature library, and a local control panel integrating an audible and visual alarm and a virtual load test function.

8. An intelligent air compressor unit system based on dynamic phase compensation according to claim 1, characterized in that, The pneumatic valve group includes a pneumatic butterfly valve (16), the response time of the pneumatic butterfly valve ≤ 0.3 seconds, and also includes a check valve (17) that can prevent gas backflow. Both the pneumatic butterfly valve (16) and the check valve (17) are sealed by magnetorheological fluid technology.

9. The intelligent air compressor unit system based on dynamic phase compensation according to claim 1, wherein A bypass pipeline (18) is connected between the buffer gas storage tanks (2) in adjacent units of the three groups of parallel air compressor units, and the adjacent buffer gas storage tanks (2) are interconnected through the bypass pipeline (18). A proportional regulating valve (19) is arranged on the bypass pipeline (18) to support cross-unit gas volume allocation.

10. A control method for an intelligent air compressor unit based on dynamic phase compensation, characterized in that, Including the following steps:

1. Pressure balance control: Monitor the pressure of the main pipe (5) in real time. If it is lower than 0.65 MPa, start the standby unit in ascending order of equivalent operation time; If it is higher than 0.75 MPa, shut down the unit in descending order of equivalent operation time; II. Life balance control: Dynamically calculate the equivalent operation time; Generate a priority queue every 6 hours and give priority to starting the low-load unit; III. Phase difference compensation: Identify the main frequency of the pressure fluctuation of the main pipe (5) and adjust the length of the adjustable bellows (6) to offset the vibration; Verify that the fluctuation amplitude ≤ ±0.5%, otherwise readjust; IV. Dew point temperature control: If the dew point > -35 °C, shorten the regeneration cycle of the adsorption dryer (3) and increase the temperature; If the dew point < -50 °C, extend the regeneration cycle and decrease the temperature; V. Fault self-healing response: After detecting a fault, isolate the faulty unit, start the standby unit, control the buffer gas storage tank (2) of the faulty unit to enter the emergency gas supply mode, and supply gas to adjacent units through the bypass pipeline (18); Adjust the load of adjacent units and the length of the adjustable bellows (6) to maintain pressure stability.

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