Intelligent constant vacuum degree mixed flow hydro-generator set full load range center operation air supplement device

Abstract

The application discloses a kind of intelligent constant vacuum degree mixed flow hydroelectric generator set full-load range center operation air supplementing device, with float ball, wind pipe, outer shaft table, inner and outer sleeve, pipe thread and adjustment shaft hole hollow shaft and valve disc hole conical valve disc are placed under valve disc seat with conical valve port.Inside fisheye bearing seat cover is placed on hollow shaft, with U-shaped plate, with rubber sealing ring and inlet pipe air distribution ring cavity are fixed in air supplementing chamber with cover plate.Inside movable shaft with bearing seat with vacuum cavity and use tension sensor and crossbeam servo motor cylinder telescopic rod connection.Vacuum sensor is screwed into vacuum cavity.Arc-shaped air distribution plate, arc-shaped air deflector, ring cavity pressure sensor and split seal platform split ring cavity cover are installed on inlet pipe air distribution ring cavity, air supplementing pipe has wind speed sensor.Vacuum cavity is communicated with air supplementing cavity, ring cavity pressure, vacuum, wind speed, tension sensor and servo motor cylinder are connected with signal line and control module unit with power cable and command cable.The application is used in the field of air supplementing of water turbine.

Description

TECHNICAL FIELD

[0001] The present application is an intelligent constant vacuum degree central operation air supplement device for Francis turbine set from minimum to rated load operation power generation whole process. BACKGROUND

[0002] At present, the mechanical center operation air supplement device is used in the Francis turbine. The air supplement device uses the air supplement stroke of the spring control valve disc to control the air supplement amount. The air supplement device is used in the Francis turbine natural air supplement stage and cannot meet the air supplement amount of the Francis turbine forced air supplement stage. The air supplement device cannot meet the technical requirements of the Francis turbine constant vacuum degree air supplement. When the Francis turbine forms a Mpa vacuum zone in the operation process, the Francis turbine vibration is caused by the vacuum zone. At this time, the valve disc is required to compress the spring to open the valve disc and supplement a large amount of air, so that the vacuum degree of the Francis turbine vacuum zone is not continuously increased. At this time, the valve disc and the valve port are in an open critical state, and a large amount of air cannot be supplemented into the vacuum zone through the overflow ring between the valve disc and the valve port. A large amount of air needs to be supplemented into the vacuum zone. The Francis turbine needs to generate a larger vacuum degree b Mpa to suck the valve disc downward to a sufficient stroke, increase the distance between the valve disc and the valve port, and increase the overflow ring of the supplemented air, so that a large amount of air can be supplemented into the vacuum zone through the air supplement cavity and the center air supplement pipeline, so that the vacuum degree of the vacuum zone is not increased. At this time, the stroke of the valve disc corresponds to the vacuum degree b Mpa. At this time, the vacuum degree b Mpa is much larger than the technical requirement that a large amount of air needs to be supplemented into the vacuum zone when the Francis turbine forms a Mpa vacuum degree. If the air supplement device in the prior art needs to supplement a large amount of air into the vacuum zone at a Mpa, the Francis turbine will not vibrate and cavitate, which will cause great damage to the Francis turbine generator set. The air supplement device in the prior art cannot supplement a large amount of air into the vacuum zone at a Mpa. The valve disc stroke needs to reach the requirement of supplementing a large amount of air when the vacuum zone reaches b Mpa. The Francis turbine generator set has occurred severe vibration. Therefore, the mechanical air supplement device in the prior art cannot meet the technical requirements of the forced air supplement, and cannot meet the technical requirements of the Francis turbine natural air supplement. The air supplement device is more suitable for supplementing air and preventing the tail water from flooding the generator set in the emergency shutdown of the Francis turbine. The mechanical air supplement device has the defects of the above principles and technologies, spring deformation and corrosion, buffer processing technology difficulty, and large overall weight. The air supplement device is installed on the large shaft end air supplement cavity, which has a certain influence on the upper guide bearing. At present, the Francis turbine urgently needs a new type of air supplement device with intelligent and constant vacuum degree, which is suitable for the whole process of the generator set operation load. The air supplement stroke of the new type of air supplement device is not affected by the spring. The vacuum degree a Mpa is constant in the air supplement process. The new type of air supplement device also has the technical features of good reliability, light weight and high intelligent level, so as to replace the mechanical center operation air supplement device in the prior art and meet the best operation technical requirements of the Francis turbine generator set. SUMMARY

[0003] The technical scheme provided by the application perfectly solves the problems of the mechanical center operation air supplement device in the prior art. The technical scheme has simple and ingenious structure and high intelligent level, and completely meets the optimal technical requirements of air supplement of the mixed-flow hydroelectric generator set in the full load range, and provides reliable and advanced technical support for safe and efficient operation of the mixed-flow hydroelectric generator set.Its main technical features are: the center position below the conical valve disc with a hole in the valve disc is fixed with a wind shield pipe with an upper hole and an arc-shaped sealing ring in a sealed manner, the float ball is placed inside the lower end of the wind shield pipe through four supporting plates and a supporting ring, the four supporting plates are fixed inside the lower end of the wind shield pipe, the valve disc seat with a conical valve port is fixed concentrically on the air supplement chamber flange of the air supplement chamber through the flange hole, air supplement chamber flange and bolts, the center air supplement pipeline is fixed below the air supplement chamber, the center air supplement pipeline is communicated with the vacuum area of the Francis turbine, the hollow rotating shaft with an outer shaft table, pipe thread and an adjusting shaft hole in the inner part is fixed on the center position above the conical valve disc through the flange hole on the base flange with bolts, the bearing seat sleeve with a fish eye bearing and an outer sleeve in the inner part is sleeved on the hollow rotating shaft, the inner sleeve is sleeved on the hollow rotating shaft and is in contact with the fish eye bearing, the outer sleeve of the fish eye bearing is in sealing contact with the inner surface of the bearing seat, the inner sleeve hole of the fish eye bearing is in sealing assembly with the hollow rotating shaft, the inner and outer sleeves of the fish eye bearing are in spherical sealing sliding, the inner sleeve is fixed by the center nut through the pipe thread, the air distribution ring cavity with a rubber sealing ring fixed on the lower outlet pipe is fixed in the air supplement chamber with the conical valve port as the center through three U-shaped plates and bolts, the rubber sealing ring is in sliding contact with the upper surface of the valve disc seat, the lower end of the movable shaft with a vacuum cavity is fixed on the bearing seat flange of the bearing seat through the shaft flange, flange hole and bolts, the inlet pipe is communicated with the air supplement pipe through the connecting flange, the wind speed sensor is installed inside the air supplement pipe through the installation boss, through hole and nut; the ring cavity pressure sensor is fixed on the split ring cavity cover with an arc-shaped wind guide plate through the through hole and nut, the split ring cavity cover has a split sealing table, the split sealing table has a split guide hole and a sealing strip, the split ring cavity cover with an arc-shaped wind guide plate is fixed on the air distribution ring cavity opposite to the inlet pipe, the split ring cavity cover with an arc-shaped air distribution plate is symmetrically fixed on the air distribution ring cavity with the inlet pipe on one side, the center lines of the arc-shaped wind guide plate and the arc-shaped air distribution plate are coincident with the X axis; the front end of the vacuum sensor is screwed into the vacuum cavity through the installation screw hole on the installation boss, and then fixed with a nut; the movable shaft and the telescopic rod of the servo electric cylinder are connected together through the tension sensor and bolts, the servo electric cylinder is fixed below the cross beam through bolts, the cross beam is fixed on two L-shaped plates at both ends respectively, and the two L-shaped plates are fixed on the inner side of the air supplement chamber through bolts; the servo electric cylinder, vacuum sensor, ring cavity pressure sensor and wind speed sensor are connected with the control module unit through signal lines with power cable and command cable, the signal lines of the tension sensor and the vacuum sensor are provided with a spiral joint, the adjusting shaft hole is communicated with the vacuum cavity on the movable shaft through the communication cavity, and the cover plate is fixed on the installation port of the air supplement chamber through the flange hole and flange screw hole with bolts.

[0004] The floating ball and the arc-shaped sealing ring mainly seal the working water from the draft tube, and when the working water comes up, the floating ball is floated, the floating ball blocks the arc-shaped sealing ring, so that the working water cannot pass through the upper hole, the hole in the valve disc, the hole in the adjusting shaft and the communication cavity into the vacuum cavity. The fish-eye bearing with large axial load force mainly solves the technical problems of centering of the moving shaft and the conical valve disc and the conical valve port, so that the conical valve disc and the conical valve port have good sealing performance, and the fish-eye bearing inner and outer sleeves have good contact and rotation sealing performance; the fish-eye bearing outer sleeve and the bearing seat inner surface and the fish-eye bearing inner sleeve and the hollow rotating shaft are installed in a sealed manner. The wind pipe and the conical valve disc are also installed in a sealed manner, such as applying water-resistant sealant at the installation position. The arc-shaped air distribution plate divides the large amount of air into two parts, and the two parts of air are supplemented into the air cavity along the circumferential surface of the air distribution ring cavity, and the arc-shaped air distribution plate mainly avoids the collision of air flow in the air distribution ring cavity to generate flocculation flow and affect the air supplement effect on the vacuum area. The split ring cavity cover is convenient for installation and maintenance, and the split butt joint surface can adopt a vertical plate sealing joint structure. A spiral joint is designed on the signal line of the tension sensor and the vacuum sensor, the main purpose is that the two sensors move up and down with the extension rod of the servo electric cylinder, the spiral joint provides extension amount for the signal line, which is convenient for the two sensors to follow the movement, and the leading end of the spiral joint can be additionally provided with a fixing structure. The control module unit sets the sensor monitoring threshold according to the instructions transmitted by the instruction cable, and accurately and quickly controls the servo electric cylinder; the control module unit can provide the best air supplement control scheme for the Francis turbine according to the best efficiency value, the minimum vibration value and other related parameters of the generator set, using mathematical model and algorithm, and reasonably and effectively implements intelligent air supplement for the generator set from the lowest load to the rated load, so that the Francis turbine can run in the best state to generate electricity in the full load range, and the harmful vacuum area of the Francis turbine due to deviation from the rated working condition is completely eliminated, and the phenomenon of violent vibration of the generator set caused by the harmful vacuum area is avoided.

[0005] The technical effects achieved by the technical scheme provided by the application are as follows: first, the control module unit sets the monitoring threshold of the vacuum sensor and the tension sensor; when the vacuum degree in the air supplement cavity reaches aMpa, the static change amount of the tension sensor reaches ΔF=moving part sleeve weight+S·P, S is the effective area of the conical valve disc, and P is the vacuum degree in the air supplement cavity, which is the harmful vacuum degree of the mixed flow water turbine when it is separated from the rated working condition, and the vacuum degree aMpa is transmitted to the vacuum cavity through the central air supplement pipeline, the air supplement cavity, the hole in the adjusting shaft and the communication cavity. The weight of the conical valve disc, the wind pipe, the bearing part and the moving shaft in the moving part sleeve is constant in the static state, the effective area of the conical valve disc is also constant, and only the vacuum degree P changes from 0 to a, which leads to the change of ΔF, so the change of the vacuum degree P leads to the change of ΔF, and when the vacuum degree P reaches aMpa, the value of ΔF=S·aMpa is the monitoring threshold set by the tension sensor.

[0006] The vacuum degree of the vacuum zone generated by the Francis turbine is transmitted to the vacuum chamber through the central air supplement pipeline, the air supplement cavity, the four support plates under the wind blocking pipe, the floating ball, the arc-shaped sealing ring, the upper hole, the valve disc hole, the adjusting shaft hole, and the communication cavity. The vacuum degree transmitted to the vacuum chamber is monitored in real time by the vacuum sensor and transmitted to the control module unit. When the vacuum sensor monitors that the vacuum degree in the vacuum chamber reaches aMpa, the monitoring threshold value at this time is transmitted to the control module unit through the signal line. The control module unit controls the descending speed and stroke of the extension rod of the servo electric cylinder according to the mathematical model and algorithm, and starts to supplement a large amount of air into the vacuum zone formed by the Francis turbine through the air supplement pipe, the inlet pipe, the air distribution ring cavity, the conical valve port, the air supplement cavity and the central air supplement pipeline. The vacuum degree must be monitored by the vacuum sensor during the whole air supplement process to see whether it meets aMpa. aMpa is the best air supplement vacuum degree of the generator set at the highest efficiency and the smallest vibration. At this time, the generator set does not have severe vibration and has the highest working efficiency. When the vacuum sensor monitors that the current vacuum degree value is greater than aMpa, the reasonable stroke of the conical valve disc is increased according to the mathematical model and algorithm, that is, the air supplement amount is increased to avoid the increase of the vacuum degree of the vacuum zone. When the vacuum sensor monitors that the current vacuum degree monitoring value is less than aMpa, the reasonable stroke of the conical valve disc is reduced according to the mathematical model and algorithm, so that the air supplement amount is reduced to restore the vacuum degree value to the vacuum degree monitoring threshold value aMpa. At this time, the air supplement amount does not reduce the working efficiency of the Francis turbine and does not cause vibration of the Francis turbine. At the same time, the algorithm is adjusted in real time according to the ring cavity pressure sensor and the wind speed sensor to make the air supplement amount into the vacuum zone more accurate. When the vacuum sensor fails to work normally, the control module unit switches to the tension sensor to monitor the change of the vacuum degree through ΔF in real time. After shutdown, the vacuum sensor should be repaired or replaced. Since the moving stroke of the conical valve disc is controlled by the servo electric cylinder according to the value monitored by the vacuum sensor, the air supplement process of the Francis turbine generator set is carried out under the condition of aMpa constant vacuum degree. The stroke of the extension rod of the servo electric cylinder is actively adjusted to realize the flow area between the conical valve disc and the conical valve port. Therefore, the air supplement process is realized at aMpa from beginning to end. The best air supplement vacuum degree aMpa value can be adjusted and set according to the operating conditions of the Francis turbine generator set at any time, which is flexible and convenient. A large amount of air supplemented into the vacuum zone can be smoothly supplemented into the vacuum zone through the arc-shaped air distribution plate and the arc-shaped air guide plate in the air distribution ring cavity, without causing air flocculation in the air distribution ring cavity to affect the air supplement effect. The floating ball is mainly used for sealing the upper tail water into the communication cavity, which brings hidden dangers to the fish eye bearing and the vacuum sensor.The fish eye bearing can adjust the concentricity and perpendicularity of the conical valve disc and the moving middle shaft and the conical valve port, and the fish eye bearing can prevent the conical valve disc from rotating the upper and lower moving middle shafts after being closed, so that the moving middle shafts rotate the tension sensor and the servo motor together, because the air supplement cavity and the valve disc seat rotate with the water turbine, the fish eye bearing with large axial load solves the technical problem that the moving middle shaft does not rotate with the conical valve disc, the conical valve disc is fixed on the inner ring of the fish eye bearing through the hollow shaft, the inner ring can rotate, and the outer ring of the fish eye bearing does not rotate. The moving middle shaft is fixed on the bearing seat of the outer ring of the fish eye bearing. The friction of the fish eye bearing is extremely small, and the friction cannot rotate the moving middle shaft, and the anti-rotation structure of the servo motor can completely overcome this problem. The split sealing table is used for sealing the moving and static parts of the moving middle shaft, and the sealing belt is arranged in the split sealing table. The rubber sealing ring on the outlet pipe is in sliding contact with the upper surface of the valve disc seat, so that the air ring cavity and the valve disc seat are well sealed. The function of the wind blocking pipe is to prevent the supplemented air from affecting the vacuum degree in the vacuum cavity, the length of the wind blocking pipe can be appropriately lengthened, and at the same time, the algorithm of the control module unit also considers the influence of the jet flow vacuum degree caused by the jet flow effect of the supplemented air at the end of the wind blocking pipe on the air supplement vacuum degree aMpa. The influence can be corrected through a mathematical model and an algorithm. The diameter of the conical valve disc is much larger than that of the wind blocking pipe, so that the jet flow vacuum degree caused by the jet flow effect can be greatly reduced.

[0007] The technical scheme provided by the application perfectly solves the technical problem of constant vacuum degree air supplement of the Francis turbine, solves the problem that the mechanical center operation air supplement device in the prior art cannot meet the optimal air supplement technical requirements of the Francis turbine, and has novelty, creativity and practicality compared with the prior art, and will be widely applied in the field of Francis turbine generator units. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 . Intelligent constant vacuum Francis turbine generator unit full load range center operation air supplement device front view

[0009] Figure 2 . Intelligent constant vacuum Francis turbine generator unit full load range center operation air supplement device A-A view

[0010] Figure 3 . Intelligent constant vacuum Francis turbine generator unit full load range center operation air supplement device B-B view

[0011] Figure 4 . Intelligent constant vacuum Francis turbine generator unit full load range center operation air supplement device I enlarged view

[0012] Figure 5N view of the intelligent constant vacuum degree Francis hydroelectric generator set full load range center operation air supplement device

[0013] Figure 6 K view of the intelligent constant vacuum degree Francis hydroelectric generator set full load range center operation air supplement device

[0014] Wherein:

[0015] 1 air supplement chamber 2 bolt 3 U-shaped plate

[0016] 4 air distribution ring cavity 5 mounting flange 6 flange hole

[0017] 7 split ring cavity cover 8 arc-shaped air deflector 9 L-shaped plate

[0018] 10 cover plate 11 mounting port 12 cross beam

[0019] 13 servo electric cylinder 14 telescopic rod 15 tension sensor

[0020] 16 mounting boss 17 mounting screw hole 18 vacuum sensor

[0021] 19 signal line 20 helical joint 21 ring cavity pressure sensor

[0022] 22 via hole 23 nut 24 split sealing platform

[0023] 25 pipe thread 26 center nut 27 inner sleeve

[0024] 28 fish eye bearing 29 aligning hole 30 conical valve port

[0025] 31 valve disc middle hole 32 upper hole 33 arc-shaped sealing ring

[0026] 34 floating ball 35 retainer ring 36 support plate

[0027] 37 wind pipe 38 conical valve disc 39 base flange

[0028] 40 outer shaft platform 41 hollow rotating shaft 42 bearing seat

[0029] 43 outer sleeve 44 bearing seat flange 45 middle shaft flange

[0030] 46 communication cavity 47 adjusting shaft middle hole 48 connecting flange

[0031] 49 inlet pipe 50 arc-shaped air distribution plate 51 sealing band

[0032] 52 split guide hole 53 vacuum cavity 54 moving middle shaft

[0033] 55. Flange hole 56. Power cable 57. Command cable

[0034] 58. Control module unit 59. Air supply pipe 60. Wind speed sensor

[0035] 61. Air supply cavity flange 62. Outlet pipe 63. Rubber sealing ring

[0036] 64. Air supply cavity 65. Valve seat 66. Central air supply pipe DETAILED DESCRIPTION

[0037] The floating ball 34 is placed in the wind shield pipe 37 by the 4 supporting plates 36 and the supporting ring 35. The 4 supporting plates 36 are fixed at the lower end of the wind shield pipe 37. The wind shield pipe 37 has an arc-shaped sealing ring 33 and an upper hole 32 at the inner upper end. The wind shield pipe 37 is fixed by bolts 2 through the flange hole 6 of the base flange 5 to the lower central position of the conical valve seat 38 with a valve disc central hole 31. The hollow rotating shaft 41 with an outer shaft base 40, pipe thread 25 and adjusting shaft central hole 47 is fixed by bolts 2 through the flange hole 6 of the base flange 39 to the upper central position of the conical valve seat 38. The valve seat 65 with a conical valve port 30 is fixed by bolts 2 through the flange hole 6 to the air supply cavity flange 61 concentrically with the air supply cavity 64. The air supply cavity 64 has a central air supply pipe 66 passing through the vacuum area of the water turbine. The outer sleeve of the fish eye bearing 28 is placed in the bearing seat 42 in a sealed manner with a centering hole 29 at the lower end and a bearing seat flange 44 at the upper end. The bearing seat 42 is placed on the hollow rotating shaft 41 in a sealed manner through the inner sleeve of the fish eye bearing 28. The inner sleeve pipe 27 is placed on the hollow rotating shaft 41 of the fish eye bearing 28. The central nut 26 is screwed on the upper end of the inner sleeve pipe 27 through the pipe thread 25. The outer sleeve pipe 43 is placed in the bearing seat 42.

[0038] The air distribution ring cavity 4 with the rubber sealing ring 63 fixed on the outlet pipe 62 is fixed by 3 U-shaped plates 3 inside the air supply chamber 1. The rubber sealing ring 63 is in sliding contact with the upper surface of the valve seat 65 and is concentric and perpendicular to the conical valve port 30. The inlet pipe 49 of the air distribution ring cavity 4 is connected to the air supply pipe 59 by the connecting flange 48 through bolts 2. The wind speed sensor 60 is fixed inside the air supply pipe 59 by the mounting boss 16 and the through hole 22 through the nut 23. The movable central shaft 54 with the vacuum cavity 53 and the mounting boss 16 is fixed by the central shaft flange 45 and the flange hole 6 through bolts 2 to the upper surface of the bearing seat flange 44. The vacuum sensor 18 is screwed into the vacuum cavity 53 through the mounting screw hole 17 and is locked by the nut 23. The lower end of the tension sensor 15 is fixed to the upper end of the movable central shaft 54 through the mounting screw hole 17 by bolts 2. The upper end of the tension sensor 15 is fixed to the extension rod 14 of the servo motor cylinder 13 by bolts 2. The servo motor cylinder 13 is fixed to the lower surface of the cross beam 12 by bolts 2. The cross beam 12 is fixed to the two L-shaped plates 9 at both ends. The two L-shaped plates 9 are fixed to the upper end of the air supply chamber 1 by bolts 2.

[0039] The ring cavity pressure sensor 21 is fixed on the split ring cavity cover 7 with the arc-shaped air deflector 8 by the screw nut 23 through the via hole 22, the sealing band 51 is filled into the split sealing platform 24 on the split ring cavity cover 7, then the split ring cavity cover 7 with the symmetric inlet pipe 49 is fixed on the air distribution ring cavity 4, the split ring cavity cover 7 with the arc-shaped air distribution plate 50 and the split sealing platform 24 is fixed on the air distribution ring cavity 4 on the side with the inlet pipe 49, the center lines of the arc-shaped air distribution plate 50 and the arc-shaped air deflector 8 coincide with the X axis. The servo electric cylinder 13, the tension sensor 15, the vacuum sensor 18, the ring cavity pressure sensor 21 and the wind speed sensor 60 are connected with the control module unit 58 with the power cable 56 and the command cable 57 through the signal line 19, the signal line 19 of the tension sensor 15 and the vacuum sensor 18 is provided with the screw joint 20. The cover plate 10 is fixed on the installation opening 11 of the air supplement chamber 1 through the flange hole 6 and the flange screw hole 55 by the bolt 2. The implementation is completed.

Claims

1. A kind of intelligent constant vacuum degree mixed flow hydroelectric generator set full load range center operation air supplement device, it is characterized in that, in The conical valve disc with a hole in the valve disc is fixed in a sealing manner at the lower center of the conical valve disc, and a wind deflector pipe with an upper hole and an arc-shaped sealing ring is fixed at the upper center of the conical valve disc. A floating ball is placed inside the lower end of the wind deflector pipe through four supporting plates and a supporting ring. The four supporting plates are fixed at the lower end inside the wind deflector pipe. A valve disc seat with a conical valve port is fixed concentrically on the air supplement chamber flange of the air supplement chamber through a flange hole, an air supplement chamber flange, and bolts. A central air supplement pipeline is fixed below the air supplement chamber, and the central air supplement pipeline is in communication with the vacuum area of the Francis turbine. A hollow rotating shaft with an outer shaft table, a pipe thread, and an adjusting shaft hole is fixed on the upper center of the conical valve disc through a flange hole on the base flange and bolts. A bearing seat with a fish-eye bearing and a sleeve pipe is sleeved on the hollow rotating shaft, and the fish-eye bearing is fixed in a sealing manner inside the bearing seat. The inner sleeve pipe is sleeved on the hollow rotating shaft and is in contact with the fish-eye bearing. The outer sleeve of the fish-eye bearing is in sealing contact with the inner surface of the bearing seat, and the inner sleeve hole of the fish-eye bearing is in sealing assembly with the hollow rotating shaft. The inner and outer sleeves of the fish-eye bearing are in spherical sealing sliding. The inner sleeve pipe is fixed through a central nut and a pipe thread. A wind distribution ring cavity with a rubber sealing ring fixed on the lower outlet pipe is fixed in the air supplement chamber in a conical valve port center through three U-shaped plates and bolts. The rubber sealing ring is in sliding contact with the upper surface of the valve disc seat. A movable central shaft with a vacuum cavity is fixed on the bearing seat flange of the bearing seat through a central shaft flange, a flange hole, and bolts. An inlet pipe is in communication with the air supplement pipe through a connecting flange. A wind speed sensor is installed inside the air supplement pipe through a mounting boss, a through hole, and a nut. A ring cavity pressure sensor is fixed on a split ring cavity cover with an arc-shaped wind deflector through a through hole and a nut. The split ring cavity cover has a split sealing table, a split guide hole, and a sealing band. The split ring cavity cover with an arc-shaped wind deflector is fixed on the wind distribution ring cavity opposite to the inlet pipe. The split ring cavity cover with an arc-shaped wind deflector is symmetrically fixed on the wind distribution ring cavity with the inlet pipe on one side. The center lines of the arc-shaped wind deflector and the arc-shaped wind deflector coincide with the X-axis. The front end of the vacuum sensor is screwed into the vacuum cavity through a mounting screw hole on the mounting boss, and then fixed with a nut. The movable central shaft and the extension rod of the servo electric cylinder are connected together through a tension sensor and bolts. The servo electric cylinder is fixed below a cross beam through bolts. The cross beam is fixed on two L-shaped plates at both ends, and the two L-shaped plates are fixed on the inner side of the air supplement chamber through bolts. The servo electric cylinder, the vacuum sensor, the ring cavity pressure sensor, and the wind speed sensor are connected with a control module unit through signal lines with power cables and command cables. The signal lines of the tension sensor and the vacuum sensor are provided with a spiral joint. The adjusting shaft hole is in communication with the vacuum cavity on the movable central shaft through a communication cavity. The cover plate is fixed on the mounting port of the air supplement chamber through a flange hole, a flange screw hole, and bolts.

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