CN114790969A - Wind driven generator set shaft centering monitoring and adjusting device and monitoring and adjusting method - Google Patents

Wind driven generator set shaft centering monitoring and adjusting device and monitoring and adjusting method Download PDF

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Publication number
CN114790969A
CN114790969A CN202210415345.8A CN202210415345A CN114790969A CN 114790969 A CN114790969 A CN 114790969A CN 202210415345 A CN202210415345 A CN 202210415345A CN 114790969 A CN114790969 A CN 114790969A
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China
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monitoring
shaft
centering
axis
adjusting device
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殷宝吉
冯镜
胡静
胡绎铭
王伟卓
张飞
陆杰
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Jiangsu University of Science and Technology
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Jiangsu University of Science and Technology
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D15/00—Transmission of mechanical power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

The invention discloses a monitoring and adjusting device and a monitoring and adjusting method for shaft centering of a wind driven generator set, which comprise a monitoring device, an adjusting device, a monitoring computer, a hydraulic station and an electro-hydraulic proportional valve; the monitoring device comprises a plurality of monitoring strain gauges which are symmetrically arranged on the surface of the coupler; the adjusting device comprises a static platform, a movable platform and a supporting leg system; the monitoring computer controls the electro-hydraulic proportional valve through the analog quantity acquisition module, and the electro-hydraulic proportional valve is connected with a hydraulic cylinder in the supporting leg system; when a high-speed shaft of the speed increasing box and a main shaft of the generator deviate, the strain gauges are monitored to deform under stress, the resistance value changes, the voltage values of the strain gauges are collected and fed back to a monitoring computer in real time, the monitoring computer judges the shaft centering state of the wind driven generator set, controls the hydraulic station to output oil flow to the electro-hydraulic proportional valve, controls the expansion amount of the hydraulic cylinder by the electro-hydraulic proportional valve, and adjusts the pose of the wind driven generator to restore the centering state. The invention realizes the real-time centering adjustment of the generator set shaft under the state of no shutdown.

Description

Wind driven generator set shaft centering monitoring and adjusting device and monitoring and adjusting method
Technical Field
The invention relates to the field of wind driven generators, in particular to a device and a method for monitoring and adjusting shaft alignment of a wind driven generator set.
Background
In the actual operation process, due to a coupling system of the wind generating set, a deviation phenomenon may be generated between the input shafts of the generators connected with the output shaft of the speed increasing box of the generating set. If the shaft centering state is not timely recovered, the main shaft of the generator set equipment is twisted and abraded, and the situation that the deflection of the coupler is increased in the operation process is caused. In order to improve the generating efficiency of the wind power plant and finish the generating index, the shaft centering adjustment of the wind turbine generator is necessary to be quickly and efficiently carried out. Chinese patent 202110959445.2 discloses an electrically controlled centering adjustment device and method for a shaft of a wind driven generator set, which utilizes adjustment components arranged on the left and right sides of the wind driven generator to perform driving adjustment by hydraulic pressure. Although the shaft centering adjustment efficiency of the wind driven generator is improved by using a self-control mode, the wind driven generator needs to be stopped in the adjustment process, and the adjustment time is long. Chinese patent 202110959443.3 discloses an adjusting method of a monitoring and adjusting device for aligning a high speed shaft of a speed increasing box with a generator shaft, which utilizes monitoring devices installed at the positions of the speed increasing box and the generator main shaft of a wind driven generator to monitor the alignment state of the wind driven generator shaft, utilizes hydraulic adjusting devices arranged at the left and right sides of the bottom of the wind driven generator to adjust, and the monitoring device and the adjusting device cooperate to perform real-time alignment adjustment on the wind driven generator. Although the shaft centering of the wind driven generator is adjusted in real time, the adjusting device has less freedom degree and cannot adjust the axial deviation of the wind driven generator.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a device and a method for monitoring and adjusting the shaft centering of a wind generating set, which can perform centering adjustment in real time when the shaft of the wind generating set deviates, and do not need to stop the wind generating set in the adjusting process.
The technical scheme is as follows: the invention discloses a monitoring and adjusting device for shaft centering of a wind driven generator set, which comprises a monitoring device, an adjusting device, a monitoring computer, a hydraulic station and an electro-hydraulic proportional valve; the monitoring device comprises a plurality of monitoring strain gauges which are symmetrically arranged on the surface of a coupler, and the coupler connects a high-speed shaft of the speed increasing box with a main shaft of the generator; the adjusting device comprises a static platform arranged on a generator base, a movable platform arranged below the wind driven generator and used for supporting the wind driven generator, and a supporting leg system connected between the static platform and the movable platform; the monitoring computer controls the electro-hydraulic proportional valve through the analog quantity acquisition module, and the electro-hydraulic proportional valve is connected with a hydraulic cylinder in the supporting leg system; when a high-speed shaft of the speed increasing box and a main shaft of the generator deviate, the monitoring strain gauges are stressed to deform, the resistance values can change correspondingly, the voltage values of the monitoring strain gauges are collected and fed back to a monitoring computer in real time, the monitoring computer judges the shaft centering state of the wind driven generator set at the moment and controls the oil flow output to the electro-hydraulic proportional valve by the hydraulic station, and the electro-hydraulic proportional valve controls the extension and retraction of a hydraulic cylinder in a supporting leg system, so that the position and the posture of the wind driven generator are adjusted, and the centering state is recovered.
The generator main shaft is provided with an absolute encoder for acquiring the position of the monitoring strain gauge when the monitoring strain gauge rotates along with the high-speed shaft of the speed increasing box and the generator main shaft, and the adjusting device is convenient to perform centering adjustment.
The supporting leg system comprises a plurality of supporting legs, and each supporting leg comprises an upper hook hinge, a connecting block, a hydraulic cylinder, a rotary bearing, a lower hook hinge, a pull rope sensor and a sliding rail; a connecting block, a hydraulic cylinder, a rotary bearing and a lower hook hinge are sequentially connected below the upper hook hinge; the upper flange of the upper Hooke hinge is connected with the movable platform through a bolt, and the upper flange of the lower Hooke hinge is connected with the static platform through a bolt; the pull rope sensor is installed on one side of the hydraulic cylinder and used for measuring displacement of a piston rod of the hydraulic cylinder, and the slide rail is installed on the other side of the hydraulic cylinder and used for limiting the rotational degree of freedom of the piston rod of the hydraulic cylinder.
The upper Hooke hinge lower flange is connected with the connecting block, the hydraulic cylinder is connected with the rotary bearing, and the rotary bearing is connected with the lower Hooke hinge through at least two connecting plates.
The electro-hydraulic proportional valves are respectively connected with hydraulic cylinders on the supporting legs in the supporting leg system, and common reversing valves are arranged on oil distribution paths of the supporting legs; an electro-hydraulic proportional reversing valve is used for controlling a main oil path, and the branch oil paths of the supporting legs respectively use a common reversing valve, so that the cost is effectively reduced.
Supporting points of supporting legs on the static platform and the movable platform in the adjusting device are arranged in an isosceles triangle shape.
The invention also comprises a method for monitoring and adjusting the shaft alignment of the wind driven generator set, which comprises the following steps:
s1: collecting A by A/D collecting module 1 、A 2 、A 3 、A 4 Point voltage signal U A1 、U A2 、U A3 、U A4 Absolute encoder phase signal
Figure BDA0003605653740000021
The points A1, A2, A3 and A4 are connection points of the A/D acquisition module and each monitoring strain gauge power supply and voltage acquisition circuit;
s2: judging voltage signal U A1 、U A2 、U A3 、U A4 If it is within the threshold, if the voltage signal U is A1 、U A2 、U A3 、U A4 The centering state is good within the threshold value, adjustment is not needed, and voltage values corresponding to the output shaft strain gauge of the speed increasing box and the generator main shaft strain gauge at the moment are recorded and serve as initial data;
s3: if the voltage signal U A1 、U A2 、U A3 、U A4 If the wind power generation set is not within the threshold value, the wind power generation set generates a deviation phenomenon in the shaft centering state, and the deviation phenomenon is determined according to an absolute encoder and an output shaft of a speed increasing boxThe output voltage values of the strain gauge and the generator main shaft strain gauge judge the deviation form and direction of a high-speed shaft of the speed increasing box and a main shaft of the wind driven generator;
s4: adjusting the pose of the wind driven generator which is subjected to the deviation by using a wind driven generator centering adjusting device according to the deviation form and the deviation direction;
s5: after the initial adjustment, comparing the voltage data collected by the output shaft strain gauge of the speed increasing box and the generator main shaft strain gauge with the initial data;
s6: if the comparison phase difference value is within the threshold value, the adjustment is finished; if the threshold value is exceeded, the control returns to step S3 to continue the adjustment.
In step S3, the method for determining the deviation form and direction of the high speed shaft of the speed increasing box and the main shaft of the wind driven generator according to the output voltage values of the absolute encoder, the output shaft strain gauge of the speed increasing box and the main shaft strain gauge of the generator specifically includes the following steps:
s3.1: if the voltage signal U A1 、U A2 Within a threshold value, but U A3 、U A4 If the wind power generator set axis is not within the threshold value, the wind power generator set axis is parallel and not centered in the X-axis direction; if U is A3 、U A4 If the deviation direction is larger than the upper limit of the threshold value, the deviation direction is the X-axis negative direction; if U is present A3 、U A4 If the deviation direction is smaller than the lower limit of the threshold value, the deviation direction is the positive direction of the X axis; if the voltage signal U A1 、U A2 If the threshold value is exceeded, the next step is carried out;
s3.2: if the voltage signal U A1 、U A2 When the wind power generation set exceeds the threshold value, the amplitudes are basically equal and the signs are opposite, the parallel misalignment of the Y-axis and Z-axis directions of the shaft of the wind power generation set occurs, and the parallel misalignment offset direction of the shaft of the wind power generation set is the Y-axis
Figure BDA0003605653740000031
Direction and Z axis
Figure BDA0003605653740000032
Direction; if the voltage signal U A1 、U A2 If the amplitude value exceeds the threshold value, the amplitude values are basically equal, and the signs are the same, the next step is carried out;
s3.3: if electricityPressure signal U A1 、U A2 When the wind power generation set exceeds the threshold value, the amplitudes are basically equal, the signs are the same, the angles of the axis of the wind power generation set in the Y-axis and Z-axis directions are not aligned, and the axis of the wind power generation set winds the Y-axis
Figure BDA0003605653740000033
Direction and about the Z axis
Figure BDA0003605653740000034
The direction angle is not centered and offset.
In step S4, the pose adjustment of the wind turbine generator with the offset by the wind turbine generator centering adjustment device according to the offset form and the offset direction specifically includes the following steps:
s4.1: the stay rope sensor collects the displacement of the piston rod of each support leg, the current length of each support leg is obtained through calculation, and the position and posture of the movable platform of the centering adjusting device of the wind generating set at the moment are calculated;
s4.2: determining the final position and posture to be reached by the adjustment movement of the movable platform according to the offset form and the offset direction;
s4.3: calculating the motion expansion amount required by the piston rod of each support leg hydraulic cylinder which is adjusted to move to a corresponding pose by the centering adjustment platform;
s4.4: controlling the motion expansion amount delta l of the piston rod of the ith support leg of the centering adjusting device i 。
S4.5: after the adjustment is finished, returning to the first step to continue monitoring the shaft alignment state of the wind driven generator set
S4.2, determining the final position and posture to be reached by the adjustment movement of the movable platform according to the offset form and the offset direction, specifically:
if the positive X-axis direction is shifted, the position is determined B O′＝[X c -ΔX 0 ,Y c ,Z c ] T Attitude (d) of
Figure BDA0003605653740000035
If the X-axis negative direction parallel misalignment occurs, the position is determined B O′＝[X c +ΔX 0 ,Y c ,Z c ] T Attitude (d) of
Figure BDA0003605653740000036
If along the Y axis
Figure BDA0003605653740000037
A direction is deviated when
Figure BDA0003605653740000038
Then position of B O′＝[X c ,Y c -ΔY 0 ,Z c ] T Attitude (d) of
Figure BDA0003605653740000041
When in use
Figure BDA0003605653740000042
Then position of B O′＝[X c ,Y c +ΔY 0 ,Z c ] T Attitude (d) of
Figure BDA0003605653740000043
When in use
Figure BDA0003605653740000044
No adjustment is required;
if along the Z axis
Figure BDA0003605653740000045
A direction is deviated when
Figure BDA0003605653740000046
Then position of B O′＝[X c ,Y c ,Z c -ΔZ 0 ] T Posture of the hand(s)
Figure BDA0003605653740000047
When the temperature is higher than the set temperature
Figure BDA0003605653740000048
Then position of B O′＝[X c ,Y c ,Z c +ΔZ 0 ] T Posture of the hand(s)
Figure BDA0003605653740000049
When the temperature is higher than the set temperature
Figure BDA00036056537400000410
No adjustment is required;
if it occurs around the Y axis
Figure BDA00036056537400000411
Direction of rotation when
Figure BDA00036056537400000412
Then position of B O′＝ B O, attitude
Figure BDA00036056537400000413
When in use
Figure BDA00036056537400000414
Then position of B O′＝ B O, posture
Figure BDA00036056537400000415
When the temperature is higher than the set temperature
Figure BDA00036056537400000416
No adjustment is required;
if it occurs around the Z axis
Figure BDA00036056537400000417
Direction of rotation when
Figure BDA00036056537400000418
Then position of B O′＝ B O, posture
Figure BDA00036056537400000419
When in use
Figure BDA00036056537400000420
Then position of B O′＝ B O, posture
Figure BDA00036056537400000421
When the temperature is higher than the set temperature
Figure BDA00036056537400000422
No adjustment is required.
Has the beneficial effects that: compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) when the generator set shaft deviates, the wind generating set can be centered and adjusted in real time under the condition that the wind generating set does not stop;
(2) in the traditional monitoring mode, a distance measuring sensor, an acoustic emission sensor, a vibration sensor and the like are used for monitoring the shaft centering state of the wind driven generator set; the mode of monitoring the shaft centering state by using the sensor can be effectively monitored when the shaft of the wind driven generator set obviously deviates. The scheme adopts the semiconductor strain gauge as a monitoring element, and can quickly and accurately reflect the state of the monitored shaft by utilizing the characteristics of large sensitivity coefficient, small mechanical hysteresis, large resistance range, small transverse effect and the like of the semiconductor strain gauge; in addition, the strain gauge is low in price, is suitable for assembling a large number of wind generating sets in each wind generating field, and effectively controls the cost;
(3) the traditional six-degree-of-freedom parallel platform structure is improved, so that the improved centering adjusting device occupies less space of a cabin of the wind driven generator, and the rectangular base of the wind driven generator is supported more stably; the Hooke hinge and the slewing bearing are used for replacing a spherical hinge, so that the defect of insufficient constraint angle of the spherical hinge is overcome on the basis of ensuring the same three degrees of freedom as the spherical hinge;
(4) according to the absolute encoder, the rotating position of the strain gauge can be known, and the centering adjustment device can conveniently recover the centering state.
Drawings
FIG. 1 is an overall structural diagram of a device for monitoring and adjusting the shaft centering of a wind power generation set according to the invention;
FIG. 2 is a schematic view of the mounting of the strain gage and coupling of the present invention;
FIG. 3 is a schematic structural view of a centering adjustment device according to the present invention;
FIG. 4 is a cross-sectional view of a single leg in the leg system;
FIG. 5 is an enlarged view of the structure at A in FIG. 4;
FIG. 6 is an enlarged view of the structure at B in FIG. 4;
FIG. 7 is a schematic diagram of a layout improvement of the leg system of the present invention;
FIG. 8 is a hydraulic diagram of the centering adjustment mechanism of the present invention;
FIG. 9 is a block diagram of a hydraulic system control circuit according to the present invention;
FIG. 10 is a schematic diagram of a hydraulic system control circuit;
FIG. 11 is a circuit diagram of a monitoring strain gage power supply and voltage acquisition circuit of the present invention;
FIG. 12 is a schematic view of a strain gage for monitoring alignment condition;
FIG. 13 is a schematic view of a parallel misalignment process strain gage monitoring strain gage;
FIG. 14 is a schematic diagram of the output voltage variation law of the two-arm half-bridge circuit in the process of parallel misalignment;
FIG. 15 is a schematic view of a strain gage for monitoring an angular misalignment process;
FIG. 16 is a schematic diagram of the output voltage variation law of the two-arm half-bridge circuit during the angle misalignment process;
FIG. 17 is a flow chart of a centering monitoring method;
fig. 18 is a flowchart of a centering adjustment method.
Detailed Description
The technical scheme of the invention is described in detail in the following with the combination of the specific embodiments and the attached drawings.
As shown in FIG. 1, the shaft centering monitoring and adjusting device of the wind generating set comprises a monitoring device 5, an adjusting device, an absolute encoder 7, a conductive slip ring 8, a monitoring computer 13, a hydraulic station 14 and an electro-hydraulic proportional valve 15. The wind generating set comprises a speed increasing box 1, a high-speed shaft 2 of the speed increasing box, a brake disc 3, a coupler 4, a generator main shaft 6 and a wind driven generator 12 which are sequentially connected from left to right. The coupling 4 connects the high-speed shaft 2 of the speed increasing box with the main shaft 6 of the generator. The monitoring device 5 comprises 6 monitoring strain gauges which are divided into three groups and symmetrically arranged on the surface of the coupler 4. The absolute encoder 7 and the conductive slip ring 8 are installed on the generator main shaft 6, and the absolute encoder 7 is used for acquiring the positions of the monitoring strain gauges when the monitoring strain gauges rotate along with the speed increasing box high-speed shaft 2 and the generator main shaft 6. The adjusting device comprises a static platform 9, a movable platform 10 and a leg system 11, wherein the static platform 9 is installed on a generator base, the movable platform 10 is installed below a wind driven generator 12 to support the wind driven generator, and the leg system 11 is installed between the static platform 9 and the movable platform 10 to connect the static platform and the movable platform into an integral structure. The monitoring computer 13 and the hydraulic station 14 are installed above the generator base, the electro-hydraulic proportional valve 15 is installed above the static platform 9, the monitoring device 5 transmits the monitored centering state data to the monitoring computer 13, and the monitoring computer 13 controls the centering adjusting device according to the monitoring data to recover the shaft centering state of the wind driven generator set.
As shown in fig. 2, a coordinate system is established with the axis direction of the main shaft of the wind turbine as the X-axis, an axis perpendicular to the X-axis and parallel to the ground as the Y-axis, and an axis perpendicular to the X-axis, the Y-axis, and the ground as the Z-axis. Monitoring devices 5 is by monitoring foil gage I21, monitoring foil gage II 22, monitoring foil gage III 23, monitoring foil gage IV 24, monitoring foil gage V25, monitoring foil gage VI 26 is constituteed, monitoring foil gage I21 is installed in the A point department of shaft coupling 4, monitoring foil gage II 22 is installed in the B point department of shaft coupling 4, monitoring foil gage III 23 is installed in the C point department of shaft coupling 4, the D point department of shaft coupling 4 is installed to monitoring foil gage IV 24, the E point department of shaft coupling 4 is installed to monitoring foil gage V25, the F point department of shaft coupling 4 is installed to monitoring foil gage VI 26. Wherein, the monitoring strain gauge I21 and the monitoring strain gauge II 22, the monitoring strain gauge I23 and the monitoring strain gauge II 24, the monitoring strain gauge V25 and the monitoring strain gauge VI 26 are symmetrically arranged. The conductive slip ring 8 is used as the zero position of the absolute encoder 7 in the positive direction of the Z axis and is used as the positive direction in the counterclockwise direction. All wires for monitoring the strain gauges are led out through the conductive slip ring 8.
As shown in fig. 3 to 6, the adjusting device is composed of a static platform 9, a movable platform 10 and a support leg system 11. The supporting leg system 11 comprises 6 supporting legs, and each supporting leg consists of an upper hooke hinge 16, a connecting block 17, a hydraulic cylinder 18, a rotary bearing 19, a lower hooke hinge 20, a pull rope sensor 37, a sliding rail 38 and a connecting plate. The specific installation mode is that a connecting block 17, a hydraulic cylinder 18, a slewing bearing 19 and a lower hooke hinge 20 are sequentially connected below an upper hooke hinge 16; an upper flange of an upper Hooke hinge 16 is in bolted connection with the adjusting device movable platform 10, a lower flange of the upper Hooke hinge 16 is in bolted connection with a connecting plate I31, a connecting block 17 is in bolted connection with a connecting plate II 32, and the connecting plate I31 is in bolted connection with the connecting plate II 32 to enable the upper Hooke hinge 16 to be connected with the connecting block 17; the connecting block 17 is connected with a piston rod of a hydraulic cylinder 18 through threads; a flange at the bottom of the hydraulic cylinder 18 is connected with a connecting plate III 33 through a bolt, a connecting plate IV 34 is connected with the upper part of the slewing bearing 19 through a bolt, and the connecting plate III 33 is connected with the connecting plate IV 34 through a bolt so that the hydraulic cylinder 18 is connected with the upper part of the slewing bearing 19; the lower part of the slewing bearing 19 is connected with a connecting plate V35, an upper flange of the lower hooke hinge 20 is connected with a connecting plate VI 36, and the connecting plate V35 is in bolt connection with the connecting plate VI 36 so that the lower part of the slewing bearing 19 is connected with the upper flange of the lower hooke hinge 20; the lower flange of the lower hooke hinge 20 is connected with the adjusting device static platform 9 through bolts. The pull rope sensor 37 is installed on one side of the hydraulic cylinder 18 and used for measuring the displacement of a piston rod in the hydraulic cylinder 18, and the slide rail 38 is installed on the other side of the hydraulic cylinder 18 and used for limiting the degree of freedom of the piston rod of the hydraulic cylinder 18 in rotation.
As shown in fig. 7, as can be seen from the dashed circle in the figure, the supporting points of the supporting legs of the static platform and the dynamic platform of the traditional six-degree-of-freedom platform are all arranged in a regular triangle; as can be seen from the solid line circle in the figure, the supporting points of the supporting legs of the static platform 9 and the movable platform 10 of the improved centering adjusting device are arranged in an isosceles triangle. The improved upper supporting legs of the movable platform 10 have better adaptability to the rectangular base of the wind driven generator, and the space of the cabin of the wind driven generator occupied by the static platform 9 is smaller.
As shown in fig. 8, the centering adjustment device hydraulic system is composed of a hydraulic station 14, an electro-hydraulic proportional valve 15, an electromagnetic directional valve I43, an electromagnetic directional valve II 44, an electromagnetic directional valve III 45, an electromagnetic directional valve IV 46, an electromagnetic directional valve V47, an electromagnetic directional valve VI 48, a hydraulic cylinder I49, a hydraulic cylinder II 50, a hydraulic cylinder III 51, a hydraulic cylinder IV 52, a hydraulic cylinder V53, and a hydraulic cylinder VI 54. The electro-hydraulic proportional valves 15 are respectively connected with the hydraulic cylinders on the supporting legs in the supporting leg system 11, and common reversing valves are arranged on the oil distributing paths of the supporting legs. When the electro-hydraulic proportional valve 15 is in the right position, the electromagnetic directional valve I43 is in the left position, the hydraulic cylinder I49 retracts, the electromagnetic directional valve I43 is in the right position, and the hydraulic cylinder I49 extends; the electromagnetic reversing valve II 44 is positioned at the left position, the hydraulic cylinder II 50 retracts, the electromagnetic reversing valve II 44 is positioned at the right position, and the hydraulic cylinder II 50 extends out; the electromagnetic reversing valve III 45 is positioned at the left position, the hydraulic cylinder III 51 retracts, the electromagnetic reversing valve III 45 is positioned at the right position, and the hydraulic cylinder III 51 extends out; the electromagnetic directional valve IV 46 is in the left position, the hydraulic cylinder IV 52 retracts, the electromagnetic directional valve IV 46 is in the right position, and the hydraulic cylinder IV 52 extends; the electromagnetic directional valve V47 is positioned at the left position, the hydraulic cylinder V53 retracts, the electromagnetic directional valve V47 is positioned at the right position, and the hydraulic cylinder V53 extends out; the electromagnetic directional valve VI 48 is positioned at the left position, the hydraulic cylinder VI 54 is retracted, the electromagnetic directional valve VI 48 is positioned at the right position, and the hydraulic cylinder VI 54 is extended.
As shown in fig. 9, the hydraulic system control circuit is composed of a monitoring computer 13, a hydraulic station 14, an electro-hydraulic proportional valve 15, an electromagnetic directional valve, an analog output module 60, an analog acquisition module 61, a pull rope sensor 37 and a relay module 65. The monitoring computer 13 controls the electro-hydraulic proportional valve 15 through the analog quantity output module 60, controls the electromagnetic directional valve through the relay module 65, and monitors the displacement of the piston rod of the hydraulic cylinder 18 through the pull rope sensor 37, so that the closed-loop control of each support leg of the centering adjusting device is realized.
As shown in fig. 10, the monitoring computer 13 and the hydraulic station 14 are powered by the mains supply 220V, and the electro-hydraulic proportional valve 15, the electromagnetic directional valve, the analog quantity output module 60 and the analog quantity acquisition module 61 are powered by the 24V power supply. The monitoring computer 13 is communicated with the analog quantity output module 60, the analog quantity acquisition module 61 and the relay module 65 through a USB-to-485 serial port, the pull rope sensor 37 outputs 4-20mA current to the analog quantity acquisition module 61, the analog quantity output module 60 outputs-10V voltage to control the electro-hydraulic proportional valve 15, and the relay module 65 outputs switching value to control the electromagnetic directional valve.
As shown in FIG. 11, wherein (a) diagram shows a power supply and voltage acquisition circuit for monitoring strain gauge I21, monitoring strain gauge II 22, monitoring strain gauge V25 and monitoring strain gauge VI 26, and the measurement is performed in a strain gauge half-bridge mannerAn amount; wherein (b) the diagram shows a power supply and acquisition circuit of a monitoring strain gauge III 23 and a monitoring strain gauge IV 24, and the measurement is carried out by adopting a strain gauge single-arm mode. When the strain gauge generates mechanical deformation under the action of external force, namely a high-speed shaft of a speed increasing box of the wind driven generator deviates from a main shaft of the wind driven generator, the resistance value changes correspondingly. When the strain gauge is stressed and stretched, the resistance value becomes large; when the strain gauge is compressed by force, the resistance value becomes small. Initial resistance values of the monitor strain gauge I21, the monitor strain gauge II 22, the monitor strain gauge III 23, the monitor strain gauge IV 24, the monitor strain gauge V25 and the monitor strain gauge VI 26 are respectively R1, R2, R3, R4, R5 and R6, and the following relations R6 are satisfied 1 R 8 ＝R 2 R 7 、R 5 R 10 ＝R 6 R 9 、R 3 R 13 ＝R 11 R 12 、R 4 R 16 ＝R 14 R 15 。
As shown in fig. 12, when the alignment state of the high speed shaft of the wind turbine speed increasing box and the main shaft of the wind turbine is good, the coupler transmits torque along with the rotation of the main shaft, torsional strain is generated, all resistors are stretched, and the resistance value is increased, but the voltage collected at the points a1 and a2 is not changed because the left resistor and the right resistor of the double-arm half-bridge circuit are the same; the single-arm bridge circuit has increased resistance, so the collected voltage at points A3 and A4 is increased. The above voltage variations all fluctuate within the threshold.
As shown in fig. 13, when the high speed shaft of the wind turbine speed increasing box is not aligned with the main shaft of the wind turbine in parallel, the monitoring strain gauge I21 is stretched, the resistance value of R1 is increased, the monitoring strain gauge II 22 is compressed, the resistance value of R2 is decreased, and the voltage at the a1 port of the a/D acquisition module is increased; monitor strain gage V25 is compressed, the R5 resistance is decreased, monitor strain gage VI 26 is stretched, the R6 resistance is increased, and the A/D acquisition module A2 port voltage is decreased. In the process of the rotation of the generator shaft, the change rule of the voltages collected by a1 and a2 is as shown in fig. 14.
As shown in fig. 14, the voltage values collected by a1 and a2 change in a sinusoidal manner. In the running process of the wind driven generator, a peak point U1 appears in the voltage value acquired by A1 at the phase X1, and the phase X1 of the coupler 4 at the moment can be obtained according to the absolute encoder 7; the voltage value acquired by a1 appears as a valley point L1 at the phase X2, and the phase X2 of the coupling 4 at this time can be obtained according to the absolute encoder 7; the voltage value acquired by a2 appears as a valley point L2 at the phase X1, and the phase X1 of the coupling 4 at this time can be obtained according to the absolute encoder 7; the voltage value collected by a2 will appear at a peak point U2 at the phase X2, and the phase X2 of the coupling 4 at this time can be obtained according to the absolute encoder 7. Therefore, the voltage values acquired at the points A1 and A2 are basically equal and have opposite signs, which indicates that the wind turbine generator set is in parallel misalignment in the axis pair, and the offset direction of the parallel misalignment is X1.
As shown in fig. 15, when the high speed shaft of the wind turbine speed increasing box is not aligned with the main shaft of the wind turbine at an angle, the monitoring strain gauge I21 is stretched, the resistance value of R1 is increased, the monitoring strain gauge II 22 is compressed, the resistance value of R2 is decreased, and the voltage at the a1 port of the a/D acquisition module is increased; the monitor strain gage V25 is stretched, the R5 resistance increases, the monitor strain gage VI 26 is compressed, the R6 resistance decreases, and the A/D acquisition module A2 port voltage increases. In the process of the rotation of the generator shaft, the change law of the voltage collected by a1 and a2 is as shown in fig. 16.
As shown in fig. 16, the voltage values collected by a1 and a2 change in a sinusoidal manner. In the running process of the wind driven generator, a peak point U3 appears in the voltage value acquired by A1 at the phase X3, and the phase X3 of the coupler 4 at the moment can be obtained according to the absolute encoder 7; the voltage value acquired by a1 appears as a valley point L3 at the phase X4, and the phase X4 of the coupling 4 at this time can be obtained according to the absolute encoder 7; the voltage value acquired by a2 has a peak point U3 at the phase X3, and the phase X3 of the coupling 4 at this time can be obtained according to the absolute encoder 7; the voltage value collected by a2 will appear at a valley point L3 at the phase X4, and the phase X4 of the coupling 4 at this time can be obtained according to the absolute encoder 7. Therefore, the voltage values acquired at the points a1 and a2 are basically equal in value and same in sign, which indicates that the wind turbine generator set is not centered at an angle in the shaft pair, and the offset direction of the misalignment is X3.
When the high-speed shaft of the wind driven generator speed increasing box and the main shaft of the wind driven generator deviate along the x axis, all resistors are simultaneously stretched or simultaneously compressed, the resistance values of all resistors are simultaneously increased or simultaneously reduced, and for a double-arm half-bridge circuit, because the left resistor and the right resistor are the same in change, the voltages acquired at the points A1 and A2 are unchanged; for the single-arm bridge circuit, the resistance value of the resistor is increased or decreased, so that the collected voltage at the points A3 and A4 is increased or decreased. Eventually, the voltage at points a1 and a2 fluctuates within the threshold, and the voltage at points A3 and a4 exceeds the threshold range.
The invention also comprises a method for monitoring and adjusting the shaft alignment of the wind driven generator set, which comprises the following steps:
s1: collecting A by A/D collecting module 1 、A 2 、A 3 、A 4 Point voltage signal U A1 、U A2 、U A3 、U A4 Absolute encoder phase signal
Figure BDA0003605653740000091
The points A1, A2, A3 and A4 are connection points of the A/D acquisition module and each monitoring strain gauge power supply and voltage acquisition circuit;
s2: judging voltage signal U A1 、U A2 、U A3 、U A4 Whether or not within the threshold, if the voltage signal U A1 、U A2 、U A3 、U A4 The centering state is good within a threshold value, adjustment is not needed, and voltage values corresponding to the output shaft strain gauge of the speed increasing box and the generator main shaft strain gauge at the moment are recorded and serve as initial data;
s3: if the voltage signal U A1 、U A2 、U A3 、U A4 If the output voltage value is not within the threshold value, the deviation phenomenon appears in the shaft centering state of the wind driven generator set, and the deviation form and direction of the high-speed shaft of the speed increasing box and the main shaft of the wind driven generator are judged according to the absolute encoder, the output shaft strain gauge of the speed increasing box and the output voltage value of the generator main shaft strain gauge;
s4: adjusting the pose of the wind driven generator which is subjected to the deviation by using a wind driven generator centering adjusting device according to the deviation form and the deviation direction;
s5: after the initial adjustment, comparing the voltage data collected by the output shaft strain gauge of the speed increasing box and the generator main shaft strain gauge with the initial data;
s6: if the comparison phase difference value is within the threshold value, the adjustment is finished; if the threshold value is exceeded, the control returns to step S3 to continue the adjustment.
As shown in fig. 17, a specific process of the centering monitoring method in the monitoring and adjusting method includes:
first, an A/D acquisition module is used for acquiring A 1 、A 2 、A 3 、A 4 Point voltage signal U A1 、U A2 、U A3 、U A4 Absolute encoder phase signal
Figure BDA0003605653740000092
Second, judge the voltage signal U A1 、U A2 、U A3 、U A4 If it is within the threshold, if the voltage signal U is A1 、U A2 、U A3 、U A4 If the wind power generator set shaft alignment state is good within the threshold value, returning to the first step to continue collecting A 1 、A 2 、A 3 、A 4 A dot voltage signal; if the voltage signal U A1 、U A2 、U A3 、U A4 If the wind power generation set shaft alignment state exceeds the threshold value, the wind power generation set shaft alignment state is poor, and the next step is carried out;
thirdly, if the voltage signal U is detected A1 、U A2 Within a threshold, but U A3 、U A4 And if the threshold value is exceeded, the parallel misalignment of the axis of the wind turbine generator set in the X-axis direction occurs. If U is present A3 、U A4 If the deviation direction is larger than the upper limit of the threshold value, the deviation direction is the X-axis negative direction; if U is present A3 、U A4 If the deviation direction is smaller than the lower threshold, the deviation direction is the positive X-axis direction. If the voltage signal U A1 、U A2 If the threshold value is exceeded, the next step is carried out;
step four, if the voltage signal U A1 、U A2 When the wind power generation set exceeds the threshold value and the amplitudes are basically equal and the signs are opposite, the axes of the wind power generation set are parallel and not aligned in the directions of the Y axis and the Z axis, and windThe direction of parallel misalignment of the axes of the force generator set is Y axis
Figure BDA0003605653740000101
Direction and Z axis
Figure BDA0003605653740000102
And (4) direction. If the voltage signal U A1 、U A2 If the amplitude value exceeds the threshold value, the amplitude values are basically equal, and the signs are the same, the next step is carried out;
fifthly, when the voltage signals UA1 and UA2 exceed the threshold values and have basically equal amplitudes and same signs, the angle of the axis of the wind power generation set is not aligned in the directions of the Y axis and the Z axis, and the axis of the wind power generation set surrounds the Y axis
Figure BDA0003605653740000103
Direction and about Z axis
Figure BDA0003605653740000104
The direction angle is not centered and offset.
As shown in fig. 18, the flow of the centering adjustment method in the monitoring adjustment method is as follows:
firstly, judging the shaft alignment state of the wind driven generator set according to the alignment monitoring device monitored in real time. If the shaft centering state of the wind driven generator set is good, the adjustment is not needed, and if the shaft centering state of the wind driven generator set is poor, the next step is carried out;
secondly, the stay cord sensor collects the displacement of the piston rod of each landing leg, and the current length l of each landing leg is obtained through calculation ic ＝l 1c ,l 2c ,l 3c ,l 4c ,l 5c ,l 6c And calculating the position and posture of the movable platform of the centering adjusting device of the wind generating set by adopting a Newton-Raphson iterative method:
Figure BDA0003605653740000105
in the formula, g ki B coordinates of the upper fulcrum of the ith supporting leg of the movable platform in a static coordinate system for centering and adjusting the platform ki For centering adjustment of platformCoordinates of a lower fulcrum of the ith supporting leg of the platform in a static coordinate system;
squaring the two sides of the above equation to obtain a nonlinear equation system containing six unknowns:
fi(Q)＝(g xi -b xi ) 2 +(g yi -b yi ) 2 +(g zi -b zi ) 2 -(l ic ) 2 ＝0
wherein Q is (Q) 1 ,q 2 ,q 3 ,q 4 ,q 5 ,q 6 )；
Figure BDA0003605653740000106
Figure BDA0003605653740000107
In the formula (I), the compound is shown in the specification,
Figure BDA0003605653740000111
Figure BDA0003605653740000112
the above formula is set at an initial value (q) 10 ,q 20 ,q 30 ,q 40 ,q 50 ,q 60 ) Taking out the linear part from the Taylor expansion:
Figure BDA0003605653740000113
let Δ q i ＝q i -q i0 Obtaining:
Figure BDA0003605653740000114
the above formula is regarded as Δ q i (i ═ 1,2,3,4,5,6) is a system of equations with coefficients of unknowns, where the system isThe number matrix is as follows:
Figure BDA0003605653740000115
if J is not equal to 0, the pose parameter variation delta q can be solved i (i-1, 2,3,4,5, 6). Let initial pose parameter Q 0 ＝[q 10 ,q 20 ,q 30 ,q 40 ,q 50 ,q 60 ] T ，Q 1 ＝Q 0 +[Δq 1 ,Δq 2 ,Δq 3 ,Δq 4 ,Δq 5 ,Δq 6 ] T The following set of equations:
Figure BDA0003605653740000121
in the formula f i (Q 1 )＝f i (q 11 ,q 21 ,q 31 ,q 41 ,q 51 ,q 61 )；
Thereby solving for Δ q i ＝(q i -q i1 )(i＝1,2,3,4,5,6)，
And then ordering: q 2 ＝Q 1 +[Δq 1 ,Δq 2 ,Δq 3 ,Δq 4 ,Δq 5 ,Δq 6 ]，
Iterative formula J (Q) n+1 -Q n )＝-f(Q n )，
Up to max (Δ q) 1 ,Δq 2 ,Δq 3 ,Δq 4 ,Δq 5 ,Δq 6 ) < threshold, at which time Q n ＝[x c ,y c ,z c ,α c ,β c ,γ c ]Namely, the position of the movable platform at the moment is obtained B O＝[X c ,Y c ,Z c ] T Posture of the hand(s)
Figure BDA0003605653740000122
According to the pull rope sensor, the length of each supporting leg is l at the moment 1c 、l 2c 、l 3c 、l 4c 、l 5c 、l 6c ；
Thirdly, judging the shaft offset form and the offset direction of the wind driven generator set according to a monitoring method;
if the positive X-axis direction deviation occurs, the position is determined B O′＝[X c -ΔX 0 ,Y c ,Z c ] T Attitude (d) of
Figure BDA0003605653740000123
If the X-axis negative direction parallel misalignment occurs, the position is determined B O′＝[X c +ΔX 0 ,Y c ,Z c ] T Attitude (d) of
Figure BDA0003605653740000124
If along the Y-axis
Figure BDA0003605653740000125
Direction of deviation when
Figure BDA0003605653740000126
Then position of B O′＝[X c ,Y c -ΔY 0 ,Z c ] T Posture of the hand(s)
Figure BDA0003605653740000127
When in use
Figure BDA0003605653740000128
Then position of B O′＝[X c ,Y c +ΔY 0 ,Z c ] T Attitude (d) of
Figure BDA0003605653740000129
When in use
Figure BDA00036056537400001210
No adjustment is required;
if along the Z-axis
Figure BDA00036056537400001211
A direction is deviated when
Figure BDA00036056537400001212
When it is in position B O′＝[X c ,Y c ,Z c -ΔZ 0 ] T Attitude (d) of
Figure BDA00036056537400001213
When in use
Figure BDA00036056537400001214
When it is in position B O′＝[X c ,Y c ,Z c +ΔZ 0 ] T Posture of the hand(s)
Figure BDA0003605653740000131
When the temperature is higher than the set temperature
Figure BDA0003605653740000132
No adjustment is required;
if it occurs around the Y axis
Figure BDA0003605653740000133
Direction of rotation when
Figure BDA0003605653740000134
Then position of B O′＝ B O, posture
Figure BDA0003605653740000135
When the temperature is higher than the set temperature
Figure BDA0003605653740000136
When it is in position B O′＝ B O, posture
Figure BDA0003605653740000137
When in use
Figure BDA0003605653740000138
No adjustment is required;
if it occurs around the Z axis
Figure BDA0003605653740000139
Direction of rotation when
Figure BDA00036056537400001310
Then position of B O′＝ B O, posture
Figure BDA00036056537400001311
When the temperature is higher than the set temperature
Figure BDA00036056537400001312
When it is in position B O′＝ B O, posture
Figure BDA00036056537400001313
When the temperature is higher than the set temperature
Figure BDA00036056537400001314
No adjustment is required;
when the position of the movable platform needs to be adjusted by delta X 0 、ΔY 0 、ΔZ 0 Posture of the patient needs to be adjusted by beta 0 、γ 0 Then, carrying out the next step, reversely solving by using the centering adjusting device, and calculating the telescopic quantity required to be adjusted by each supporting leg;
fourthly, calculating the motion expansion amount required by the piston rod of each support leg hydraulic cylinder of the centering adjustment platform to adjust to the corresponding pose;
firstly, importing the position and posture matrix of the third step moving platform into a formula
Figure BDA00036056537400001315
Figure BDA00036056537400001316
Figure BDA00036056537400001317
In the formula, c beta represents cos beta, s alpha represents sin alpha and the like;
B l i ＝A i ′- B B i0
in the formula, A i ' is the coordinate of the movable platform connecting point in the coordinate system of the static platform, B B i0 coordinates of the static platform connecting point in a static platform coordinate system;
Figure BDA00036056537400001318
(i＝1,2,3,4,5,6).
then the length of each leg at this time is:
Figure BDA0003605653740000141
the telescopic quantity of each support leg hydraulic cylinder is as follows:
Δl i ＝l i -l ic
in the formula I ic ＝l 1c ,l 2c ,l 3c ,l 4c ,l 5c ,l 6c 。
Fifthly, controlling the motion expansion amount delta l of the piston rod of the ith supporting leg of the centering adjusting device i ；
And sixthly, returning to the first step to continuously monitor the shaft alignment state of the wind driven generator set after the adjustment is finished.

Claims (10)

1. The utility model provides a aerogenerator group axle centering monitoring adjusting device which characterized in that: comprises a monitoring device (5), a regulating device, a monitoring computer (13), a hydraulic station (14) and an electro-hydraulic proportional valve (15); the monitoring device (5) comprises a plurality of monitoring strain gauges which are symmetrically arranged on the surface of the coupler (4), and the coupler (4) connects the high-speed shaft (2) of the speed increasing box with the main shaft (6) of the generator;
the adjusting device comprises a static platform (9) arranged on a generator base and a movable platform (10) arranged below the wind driven generator (12) and used for supporting the wind driven generator, wherein the static platform (9) is connected with the movable platform (10) through a supporting leg system (11);
the monitoring computer (13) controls the electro-hydraulic proportional valve (15) through the analog quantity output module, and the electro-hydraulic proportional valve (15) is connected with a hydraulic cylinder in the supporting leg system (11);
when the high-speed shaft (2) of the speed increasing box and the main shaft (6) of the generator deviate, the monitoring strain gauges are stressed to deform, the resistance value changes correspondingly, the voltage value of each monitoring strain gauge is collected and fed back to the monitoring computer (13) in real time, the monitoring computer (13) judges the shaft centering state of the wind driven generator set at the moment, the oil flow output to the electro-hydraulic proportional valve (15) by the hydraulic station (14) is controlled, the electro-hydraulic proportional valve (15) controls the extension and retraction of a hydraulic cylinder in the supporting leg system (11), the pose of the wind driven generator (12) is adjusted, and the centering state is recovered.
2. The wind generating set shaft centering monitoring and adjusting device according to claim 1, wherein: an absolute encoder (7) is installed on the generator main shaft (6) and used for acquiring the position of the monitoring strain gauge rotating along with the speed increasing box high-speed shaft (2) and the generator main shaft (6).
3. The wind generating set shaft centering monitoring and adjusting device according to claim 1, wherein: the supporting leg system (11) comprises a plurality of supporting legs, and each supporting leg comprises an upper hook hinge (16), a connecting block (17), a hydraulic cylinder (18), a slewing bearing (19), a lower hook hinge (20), a pull rope sensor (37) and a sliding rail (38);
a connecting block (17), a hydraulic cylinder (18), a slewing bearing (19) and a lower hook hinge (20) are sequentially connected below the upper hook hinge (16); an upper flange of the upper Hooke hinge (16) is connected with the movable platform (10) through a bolt, and an upper flange of the lower Hooke hinge (20) is connected with the static platform (9) through a bolt;
the pull rope sensor (37) is installed on one side of the hydraulic cylinder (18) and used for measuring the displacement of a piston rod of the hydraulic cylinder (18), and the sliding rail (38) is installed on the other side of the hydraulic cylinder (18) and used for limiting the rotation freedom degree of the piston rod of the hydraulic cylinder (18).
4. The wind generating set shaft centering monitoring and adjusting device according to claim 3, wherein: the lower flange of the upper Hooke hinge (16) is connected with the connecting block (17), the hydraulic cylinder (18) is connected with the slewing bearing (19), and the slewing bearing (19) is connected with the lower Hooke hinge (20) through at least two connecting plates.
5. The wind generating set shaft centering monitoring and adjusting device according to claim 1, characterized in that: the electro-hydraulic proportional valves (15) are respectively connected with hydraulic cylinders on the supporting legs in the supporting leg system (11), and common reversing valves are arranged on the oil distributing paths of the supporting legs.
6. The wind generating set shaft centering monitoring and adjusting device according to claim 1, wherein: supporting points of supporting legs on the static platform (9) and the movable platform (10) in the adjusting device are arranged in an isosceles triangle shape.
7. A wind power generation set shaft centering monitoring and adjusting method is characterized in that the wind power generation set shaft centering monitoring and adjusting device of claim 2 is adopted, and the method comprises the following steps:
s1: collecting A by A/D collecting module 1 、A 2 、A 3 、A 4 Point voltage signal U A1 、U A2 、U A3 、U A4 Absolute encoder phase signal
Figure FDA0003605653730000023
The points A1, A2, A3 and A4 are connection points of the A/D acquisition module and each monitoring strain gauge power supply and voltage acquisition circuit;
s2: judging voltage signal U A1 、U A2 、U A3 、U A4 Whether or not within the threshold, if the voltage signal U A1 、U A2 、U A3 、U A4 The centering state is good within the threshold value, adjustment is not needed, and voltage values corresponding to the output shaft strain gauge of the speed increasing box and the generator main shaft strain gauge at the moment are recorded and serve as initial data;
s3: if the voltage signal U A1 、U A2 、U A3 、U A4 If the wind power is not within the threshold value, the wind power generation is carried outThe deviation phenomenon occurs in the centering state of the shaft of the unit, and the deviation form and direction of the high-speed shaft of the speed increasing box and the main shaft of the wind driven generator are judged according to the output voltage values of the absolute encoder, the output shaft strain gauge of the speed increasing box and the main shaft strain gauge of the generator;
s4: adjusting the pose of the wind driven generator which is subjected to the deviation by using a wind driven generator centering adjusting device according to the deviation form and the deviation direction;
s5: after the initial adjustment, comparing the voltage data collected by the output shaft strain gauge of the speed increasing box and the generator main shaft strain gauge with the initial data;
s6: if the comparison phase difference value is within the threshold value, the adjustment is finished; if the threshold value is exceeded, the control returns to step S3 to continue the adjustment.
8. The method for monitoring and adjusting the shaft alignment of the wind generating set according to claim 7, wherein in step S3, the method for determining the deviation form and direction of the high speed shaft of the speed increasing box and the main shaft of the wind generating set according to the output voltage values of the absolute encoder, the output shaft strain gauge of the speed increasing box and the strain gauge of the main shaft of the generator specifically comprises the following steps:
s3.1: if the voltage signal U A1 、U A2 Within a threshold value, but U A3 、U A4 If the wind power generation set axis is not within the threshold, the wind power generation set axis is parallel to the X axis and is not centered; if U is present A3 、U A4 If the deviation direction is larger than the upper limit of the threshold value, the deviation direction is the X-axis negative direction; if U is A3 、U A4 If the deviation direction is smaller than the lower threshold, the deviation direction is the positive direction of the X axis; if the voltage signal U A1 、U A2 If the threshold value is exceeded, the next step is carried out;
s3.2: if the voltage signal U A1 、U A2 When the wind power generator set exceeds the threshold value, the amplitudes are basically equal and the signs are opposite, the parallel misalignment of the Y-axis and Z-axis directions occurs on the shaft of the wind power generator set, and the parallel misalignment of the shaft of the wind power generator set is the Y-axis direction
Figure FDA0003605653730000021
Direction and Z axis
Figure FDA0003605653730000022
Direction; if the voltage signal U A1 、U A2 If the amplitude value exceeds the threshold value, the amplitude values are basically equal, and the signs are the same, the next step is carried out;
s3.3: if the voltage signal U A1 、U A2 If the wind power generator set exceeds the threshold value, the amplitudes are basically equal and the signs are the same, the angles of the axis of the wind power generator set in the Y-axis and Z-axis directions are not aligned, and the axis of the wind power generator set is wound around the Y-axis
Figure FDA0003605653730000031
Direction and about Z axis
Figure FDA0003605653730000032
The direction angle is not centered and offset.
9. The method for monitoring and adjusting the shaft centering of the wind power generation unit according to claim 7, wherein in step S4, the method for adjusting the position and posture of the wind power generation unit with the wind power generation unit centering adjusting device according to the offset form and the offset direction comprises the following steps:
s4.1: the stay cord sensor collects the displacement of the piston rod of each support leg, the current length of each support leg is obtained through calculation, and the position and posture of the movable platform of the centering and adjusting device of the wind generating set at the moment are calculated;
s4.2: determining the final position and posture to be reached by the adjustment movement of the movable platform according to the offset form and the offset direction;
s4.3: calculating the motion expansion amount required by the piston rod of each support leg hydraulic cylinder which is adjusted to move to the corresponding pose by the centering adjustment platform;
s4.4: controlling the motion expansion amount delta l of the piston rod of the ith support leg of the centering adjusting device i 。
S4.5: and returning to the first step to continuously monitor the shaft alignment state of the wind driven generator set after the adjustment is finished.
10. The method for monitoring and adjusting the shaft centering of the wind generating set according to claim 9, wherein in step S4.2, the final position and posture to be achieved by the adjusting movement of the movable platform are determined according to the offset form and the offset direction, specifically:
if the positive X-axis direction deviation occurs, the position is determined B O′＝[X c -ΔX 0 ,Y c ,Z c ] T Posture of the hand(s)
Figure FDA0003605653730000033
If the X-axis negative direction parallel misalignment occurs, the position is determined B O′＝[X c +ΔX 0 ,Y c ,Z c ] T Posture of the hand(s)
Figure FDA0003605653730000034
If along the Y axis
Figure FDA0003605653730000035
A direction is deviated when
Figure FDA0003605653730000036
Then position of B O′＝[X c ,Y c -ΔY 0 ,Z c ] T Attitude (d) of
Figure FDA0003605653730000037
When the temperature is higher than the set temperature
Figure FDA0003605653730000038
When it is in position B O′＝[X c ,Y c +ΔY 0 ,Z c ] T Posture of the hand(s)
Figure FDA0003605653730000039
When the temperature is higher than the set temperature
Figure FDA00036056537300000310
No adjustment is required;
if along the Z-axis
Figure FDA00036056537300000311
Direction of deviation when
Figure FDA00036056537300000312
When it is in position B O′＝[X c ,Y c ,Z c -ΔZ 0 ] T Attitude (d) of
Figure FDA00036056537300000313
When in use
Figure FDA00036056537300000314
When it is in position B O′＝[X c ,Y c ,Z c +ΔZ 0 ] T Attitude (d) of
Figure FDA00036056537300000315
When the temperature is higher than the set temperature
Figure FDA00036056537300000316
No adjustment is required;
if it occurs around the Y axis
Figure FDA0003605653730000041
Direction of rotation when
Figure FDA0003605653730000042
When it is in position B O′＝ B O, attitude
Figure FDA0003605653730000043
When the temperature is higher than the set temperature
Figure FDA0003605653730000044
When it is in position B O′＝ B O, attitude
Figure FDA0003605653730000045
When the temperature is higher than the set temperature
Figure FDA0003605653730000046
No adjustment is required;
if it occurs around the Z axis
Figure FDA0003605653730000047
Direction of rotation when
Figure FDA0003605653730000048
When it is in position B O′＝ B O, attitude
Figure FDA0003605653730000049
When in use
Figure FDA00036056537300000410
Then position of B O′＝ B O, attitude
Figure FDA00036056537300000411
When the temperature is higher than the set temperature
Figure FDA00036056537300000412
No adjustment is required.
CN202210415345.8A 2022-04-20 2022-04-20 Wind driven generator set shaft centering monitoring and adjusting device and monitoring and adjusting method Pending CN114790969A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118167570A (en) * 2024-05-11 2024-06-11 国电联合动力技术有限公司 Wind turbine shafting centering detection method and system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118167570A (en) * 2024-05-11 2024-06-11 国电联合动力技术有限公司 Wind turbine shafting centering detection method and system

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