CN105675280B - Km deep-well main shaft of hoister bending composite fatigue damage monitoring device and method - Google Patents
Km deep-well main shaft of hoister bending composite fatigue damage monitoring device and method Download PDFInfo
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- CN105675280B CN105675280B CN201610091250.XA CN201610091250A CN105675280B CN 105675280 B CN105675280 B CN 105675280B CN 201610091250 A CN201610091250 A CN 201610091250A CN 105675280 B CN105675280 B CN 105675280B
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Abstract
The invention discloses a kind of km deep-well main shaft of hoister bending composite fatigue damage monitoring device and method, the device includes pedestal, the main shaft device and loading system that are arranged on pedestal and the condition monitoring system being arranged on main shaft device, main shaft device includes main shaft, main drum is provided with the middle part of main shaft, main shaft is provided with ring flange, main drum both sides mounting flange, Wound steel rope in main drum grooving, main shaft one end is provided with A bearings, the main shaft other end is held provided with B axle, and A bearings are placed in A bearing blocks, and B axle bearing is in B axle bearing；Loading system includes the first loading system and the second loading system for being arranged on steel wire rope both ends；Condition monitoring system includes tension monitoring system, stress measurement system, torch measuring system, crack monitoring system.The present invention can simulate the bending composite fatigue behavior of main shaft of hoister under different vibration and impact operating modes in km deep-well lifting process, and dynamic monitoring main shaft of hoister bending composite fatigue Cracks Evolution mechanism.
Description
Technical field
Patent of the present invention is related to km deep-well main shaft of hoister bending composite fatigue damage monitoring device and method, Neng Goumo
Intend the bending composite fatigue behavior of main shaft of hoister under different vibration and impact operating modes in km deep-well lifting process, dynamic monitoring
Bending composite fatigue damage (crack initiation and propagation) mechanism of Evolution of main shaft of hoister and the Evolution (collection of various load
Middle load, moment of flexure and moment of torsion).
Background technology
In coal resources have been verified, 53% coal is buried below km stratum, the super km deep-well in China up to 47,
And its quantity is increasing year by year.Multi-rope friction type lifting system (including elevator, boom hoist cable, hoisting container etc.) is with lifting
The advantages that ability is big, hoisting depth is big, lifting speed is fast, safety coefficient is high and machine dimensions are small, is widely used in km and stands
It is the throat equipment for connecting ground and underground in well lifting, is responsible for lifting coal, lower putting material, lifts personnel and equipment
Task.In friction hoisting system, motor by main shaft device (including main shaft, main shaft bearing, bearing block, reel etc., its
Middle main shaft and reel pass through high strength exploitation) driving spool turns, by friction lining on reel and boom hoist cable it
Between frictional force realize raising and decentralizing for hoisting container (skip bucket or cage).Therefore, main shaft of hoister is born as elevator
The critical component of load and passing power, once failure fracture occurs, serious economic loss and great personnel will be caused to hinder
Die.
During mine hoisting, elevator accelerates, the pendency rope length at the uniform velocity with deceleration characteristic and time-varying causes to be lifted
During lifting system transverse direction-coupled longitudinal vibration and reel both sides boom hoist cable transverse direction-Longitudinal data dynamics,
And then cause the dynamic characteristic (alternate tension, alternate torque and alternation moment of flexure) for acting on main load on axle, and km deep-well
The dynamic alternate load amplitude increase that big range of lift, big lifting load and high lifting speed cause main shaft of hoister to be born.This
The collective effect of a little load can cause main shaft of hoister to produce fatigue crack initiation, extension and final catastrophic break, i.e. bending
Composite fatigue.However, different lifting system kinematics parameters and kinetic parameter cause the main shaft load situation of difference, and then
Cause different main shaft bending composite fatigue fracture mechanisms.Therefore, special operation condition is lifted with reference to km deep-well, it is quantitative to disclose lifting
The fatigue crack initiation of owner's axle develops with extension, builds the bending composite fatigue Life Prediction Model of main shaft of hoister, obtains
The optimal lifting system kinematics and kinetic parameter of main shaft of hoister bending composite fatigue failure are reduced, to improving km deep-well
The security of hoisting device, the generation for reducing serious accident, avoid casualties or device damage, ensure China's energy supply tool
It is significant.Therefore the main shaft of hoister bending composite fatigue damage monitoring reality, it is necessary to which a kind of vibration and impact operating mode go down into a mine
Experiment device, the bending fatigue damage for main shaft of hoister in Quantitative Monitoring lifting operating mode different with analysis develop.
Experimental provision in terms of about mine hoist main shaft includes：The one of Patent No. ZL201310676760.X announcements
Kind main shaft fatigue experimental device, centrifugal load is produced using eccentric rotary mode, is closely applied constant bending in spindle nose and is carried
Lotus, to simulate the moment of flexure situation that base bearing in actual motion is received；One kind that Patent No. ZL201410028404.1 is announced is axially
Differential type mine hoist main-shaft torque detection means, mine hoist main-shaft torque can be detected in real time by light sensitive device,
Moment of torsion when measuring different rotating speeds；In above-mentioned patent experimental rig can not apply simultaneously dynamic concentrfated load, bending load and
Moment of torsion.A kind of principal shaft apparatus of single-winding drum mine hoist that Patent No. ZL200820220208.4 is announced, main shaft are provided with method
Blue disk, reel, by high strength exploitation, improve axis system structure and its intensity with ring flange；Patent No.
A kind of mine hoist main shaft that ZL200820016120.0 is announced, without key shrinkage connection structure, obtains simplified lifting with wheel hub
The assembling structure of owner's axle and wheel hub；The device or structure being related in above-mentioned patent can not simulate km deep-well lifting process
The bending composite fatigue failure behaviour of main shaft of hoister under middle different vibrations and impact operating mode.Therefore, lifted for km deep-well
During under different vibration and impact operating modes the dynamic of main shaft of hoister bending composite fatigue damage development and various load it is real
When monitor experimental provision or blank.
The content of the invention
Goal of the invention：The purpose of the present invention is to overcome weak point of the prior art, there is provided a kind of compact-sized, function
It is complete, method is easy, easy-operating km deep-well main shaft of hoister bending composite fatigue damage monitoring device and method, Neng Goumo
Intend the bending composite fatigue behavior of main shaft of hoister under different vibration and impact operating modes in km deep-well lifting process, and dynamic
Monitor main shaft of hoister bending composite fatigue Cracks Evolution mechanism.
To achieve these goals, present invention employs following technical scheme：A kind of km deep-well main shaft of hoister is curved
Turn round composite fatigue damage monitoring device, including pedestal, main shaft device, loading system and condition monitoring system, main shaft device and plus
Loading system is arranged on pedestal, and condition monitoring system is arranged on main shaft device；
The main shaft device includes main shaft, and main drum is provided with the middle part of main shaft, and main shaft is provided with ring flange, and main drum both sides connect
Acting flange disk, Wound steel rope in main drum grooving, main shaft one end are provided with A bearings, and the main shaft other end is held provided with B axle, and A bearings are put
In in A bearing blocks, B axle bearing is in B axle bearing；
The loading system includes the first loading system and the second loading system, and the first loading system includes A support shafts and A
Motor, A support shafts middle part are provided with A reels, and for steel wire rope one ends wound in A drum rope grooves, A support shafts one end is provided with C bearings and C
Shaft coupling, the A support shafts other end are provided with D bearings, and C bearings are placed in C bearing blocks, and D bearings are placed in D bearing blocks, C shaft couplings with
A motor output shafts are connected, and second loading system includes B support shafts and B motors, and B reels, steel wire are provided with the middle part of B support shafts
The rope other end is wound in B drum rope grooves, and B support shafts one end is provided with E bearings and B shaft couplings, and the B support shafts other end is provided with F axles
Hold, E bearings are placed in E bearing blocks, and F bearings are placed in F bearing blocks, and B shaft couplings are connected with B motor output shafts；
The condition monitoring system includes tension monitoring system, stress measurement system, torch measuring system, crack monitoring system
System, tension monitoring system includes A tension sensors and B tension sensor A tension sensors are arranged between main drum and A reels
Steel wire rope on, B tension sensors are arranged on the steel wire rope between main drum and B reels, stress measurement system include paste
The first foil gauge on ring flange and the second foil gauge being pasted onto on main shaft, torch measuring system include torque sensor,
Torque sensor one end and A flange axis connections, the torque sensor other end and B flange axis connections, A flange shafts pass through G bearings, B
Flange shaft is connected by A shaft couplings with spindle nose, and crack monitoring system includes high-speed camera and acoustic emission sensor.
Further, the pedestal includes bottom plate, the first support post being arranged on bottom plate and the second support post, set
Put the fixation angle steel between bottom plate and the first support post bottom and be arranged on the first support post and the second support post
The bearing beam on top.
Further, the A bearing blocks and B axle bearing are fixed on bearing beam by screw, C bearing blocks and D bearings
Seat is fixed by screws in A support blocks, and A support blocks are bolted on bottom plate, and A motors are set by A motor support bases
On bottom plate, E bearing blocks and F bearing blocks are fixed by screws in B support blocks, and B support blocks are bolted on bottom plate,
B motors are arranged on bottom plate by B motor support bases, and G bearings are installed on bearing beam.
According to the km deep-well main shaft of hoister bending composite fatigue damage monitoring method of above-mentioned monitoring device, including it is following
Step：
A) A motor support bases, the position of A support blocks, B motor support bases and B support blocks on bottom plate are adjusted, obtain steel wire rope with
Cornerite setting value is enclosed between main drum；
B) by the first strain gauge adhesion in flange disc side, by the second strain gauge adhesion outside the main shaft close to ring flange
Surface, by high-speed camera alignment flange disc side, acoustic emission sensor is placed in the outerface of spindle；
C) by Frequency Converter Control can rotating A motors and B motors, stretching steel wire rope is until B tension sensors and A
Force snesor reaches initial set value；
D) rotating speed, frequency, corner amplitude and the steering of A motors and B motors are set by frequency converter, to steel wire on main drum
Both ends of restricting apply different tensioning load, pass through A tension sensors, B tension sensors, torque sensor, the first foil gauge, the
Two foil gauges, high-speed camera and acoustic emission sensor respectively in real time record main drum both sides steel wire rope dynamic loading, main shaft by
Moment of torsion, concentrfated load and bending load, main shaft upper flange plate crack initiation or spread scenarios；When the cycle-index for reaching setting
Afterwards, A motors and B motors are closed, stops experiment；
E) change A motor support bases, the position of A support blocks, B motor support bases and B support blocks on bottom plate, obtain difference and enclose bag
Angle；
F) repeat step c) and d), in the case of research difference encloses cornerite, steel wire rope both ends Tension Difference, load shape on main drum
Affecting laws of the formula to main shaft bending composite fatigue derogatory behaviour.
Further, in step a), enclose cornerite and should be less than being equal to 195 °
Further, in step b), grease is scribbled between acoustic emission sensor and main shaft.
Beneficial effect：The present invention is directed to dynamic loading and shock loading operating mode in km deep-well lifting process, considers and carries
Rise the collective effect of concentrfated load, torsional load and bending load that main bearing is received, can dynamic monitoring and quantitatively characterizing carry
Stressing conditions, crack initiation and propagation evolution and its affecting laws by elevator operating condition parameter of owner's axle are risen, it is right
Main shaft of hoister bending composite fatigue derogatory behaviour research provides effectively experimental facilities and effective foundation under difference lifting operating mode,
To predicting that the service life of km deep-well main shaft of hoister has wide applicability, to deep-well and ultra-deep mine hoisting operation peace
It is complete significant.
Brief description of the drawings
Fig. 1 is the front view of patent structure of the present invention；
Fig. 2 is the top view of patent structure of the present invention；
Fig. 3 is Fig. 1 A-A sectional views；
Fig. 4 is partial enlarged drawing at Fig. 3 I.
In figure：1st, G bearings；2nd, A flange shafts；3rd, torque sensor；4th, B flange shafts；5th, A shaft couplings；6th, A bearing blocks；7、A
Bearing；8th, main shaft；9th, the second foil gauge；10th, high-speed camera；11st, acoustic emission sensor；12nd, B axle is held；13rd, B axle bearing；
14th, the first support post；15th, A motors；16th, A motor support bases；17th, C shaft couplings；18th, A support shafts；19th, C bearing blocks；20th, A branch
Bracer；21st, D bearing blocks；22nd, fixed angle steel；23rd, B support shafts；24th, B shaft couplings；25th, B motor support bases；26th, bottom plate；27th, B electricity
Machine；28th, the second support post；29th, bearing beam；30th, E bearing blocks；31st, E bearings；32nd, B support blocks；33rd, F bearings；34th, F axles
Bearing；35th, C bearings；36th, D bearings；37th, B reels；38th, B tension sensors；39th, steel wire rope；40th, main drum；41st, A tension force passes
Sensor；42nd, A reels；43rd, the first foil gauge；44th, high-strength bolt.
Embodiment：
Further explanation is done to the present invention below in conjunction with the accompanying drawings.
As shown in Figures 1 to 4, a kind of km deep-well main shaft of hoister bending composite fatigue damage monitoring device of the invention,
Including pedestal, main shaft device, loading system and condition monitoring system, main shaft device and loading system are arranged on pedestal, state
Monitoring system is arranged on main shaft device.
The pedestal includes bottom plate 26, the first support post 14 being arranged on bottom plate 26 and the second support post 28, set
Put the fixation angle steel 22 between the bottom of 26 and first support post of bottom plate 14 and be arranged on the first support post 14 and second
The bearing beam 29 on the top of support post 28.
The main shaft device includes main shaft 8, and the middle part of main shaft 8 is provided with main drum 40, and main shaft 8 is provided with and the one of main shaft 8
Ring flange, the both sides of main drum 40 are by the mounting flange of high-strength bolt 44, Wound steel rope 39 in the grooving of main drum 40, main shaft
8 one end are provided with A bearings 7, and the other end of main shaft 8 holds 12, A bearings 7 provided with B axle and is placed in A bearing blocks 6, and B axle, which holds 12 and is placed in B axle, holds
In seat 13, A bearing blocks 6 and B axle bearing 13 are fixed on bearing beam 29 by screw.
The loading system includes the first loading system and the second loading system.
First loading system includes A support shafts 18 and A motors 15, and the middle part of A support shafts 18 is provided with A reels 42, steel wire rope 39
For one ends wound in the grooving of A reels 42, the one end of A support shafts 18 is provided with C bearings 35 and C shaft couplings 17, and the other end of A support shafts 18 is set
There are D bearings 36, C bearings 35 are placed in C bearing blocks 19, and D bearings 36 are placed in D bearing blocks 21, C bearing blocks 19 and D bearing blocks 21
It is fixed by screws in A support blocks 20, A support blocks 20 are bolted on bottom plate 26, C shaft couplings 17 and A motors 15
Output shaft is connected, and A motors 15 are arranged on bottom plate 26 by A motor support bases 16.
Second loading system includes B support shafts 23 and B motors 27, and the middle part of B support shafts 23 is provided with B reels 37, steel wire rope 39
The other end is wound in the grooving of B reels 37, and the one end of B support shafts 23 is provided with E bearings 31 and B shaft couplings 24, the other end of B support shafts 23
Provided with F bearings 33, E bearings 31 are placed in E bearing blocks 30, and F bearings 33 are placed in F bearing blocks 34, E bearing blocks 30 and F bearing blocks
34 are fixed by screws in B support blocks 32, and B support blocks 32 are bolted on bottom plate 26, B shaft couplings 24 and B motors
27 output shafts are connected, and B motors 27 are arranged on bottom plate 26 by B motor support bases 25.
The condition monitoring system includes tension monitoring system, stress measurement system, torch measuring system, crack monitoring system
System.
Tension monitoring system includes A tension sensors 41 and B tension sensors 38, and A tension sensors 41 are arranged on master file
On steel wire rope 39 between 40 and A of cylinder reels 42, B tension sensors 38 are arranged on the steel wire between main drum 40 and B reels 37
On rope 39.Foil gauge links together in the way of bridge circuit in tension sensor, the resistance of foil gauge when by external force
Value also changes therewith, and the size of change value is proportional to the size of tension force, for putting on 40 liang of main drum during measurement experiment
Dynamic tension or shock loading on side steel wire rope 39.
The second strain that stress measurement system includes the first foil gauge 43 being pasted onto on ring flange and is pasted onto on main shaft 8
Piece 9.First foil gauge 43 is used for the ess-strain for measuring flange panel surface near the junction of high-strength bolt 44, the second foil gauge
9 are used to measure the surface concentrated stress of main shaft 8 and bending stress, by the way that strain gauge adhesion on testee surface, was being tested
Foil gauge can stretch together with tested in journey, and its resistance that can stretch accordingly of the metal in foil gauge can change, and pass through
The change of detection resistance carrys out the change of measuring strain, and then measures the ess-strain of testee, the measurement for bending stress
The methods of wheatstone bridge circuits is built by using foil gauge to detect the change of testee surface strain sheet resistance to realize.
Torch measuring system includes torque sensor 3, and the one end of torque sensor 3 is connected with A flange shafts 2, torque sensor 3
The other end is connected with B flange shafts 4, and A flange shafts 2 pass through G bearings 1, and G bearings 1 are installed on bearing beam 29, and B flange shafts 4 pass through
A shaft couplings 5 are connected with the end of main shaft 8.Torque sensor 3 develops for the moment of torsion that main shaft 8 during measurement experiment is born.Moment of torsion
Sensor 3 is by pasting Strain Meter Set on its elastic shaft into measuring bridge, after elastic shaft is produced micro-strain by moment of torsion
Cause bridge resistor value changes, the change transitions of strain bridge resistance are the change of electric signal so as to realizing torque measurement.
The crack monitoring system includes being arranged on the high-speed camera 10 and acoustic emission sensor 11 near main shaft 8, uses
Germinating and spread scenarios in dynamic monitoring crackle.Acoustic emission sensor 11 is the elastic wave sent by acoustic emission source, through being situated between
Matter travels to the mechanical oscillation for up to subject surface, causing surface.The transient Displacements on surface are converted into electricity by acoustic emission sensor
Signal.After amplified, processing, its waveform and characterisitic parameter are recorded and shown acoustic emission signal.
According to the km deep-well main shaft of hoister bending composite fatigue damage monitoring method of above-mentioned monitoring device, including it is following
Step：
A) A motor support bases 16, the position of A support blocks 20, B motor support bases 25 and B support blocks 32 on bottom plate 26 are adjusted, is obtained
Obtain and enclose cornerite setting value between steel wire rope 39 and main drum 40, enclose cornerite and should be less than being equal to 195 °；
B) the first foil gauge 43 is pasted onto in flange disc side, the second foil gauge 9 is pasted onto the master close to ring flange
The outer surface of axle 8, by the alignment flange disc side of high-speed camera 10, acoustic emission sensor 11 is placed in the outer surface of main shaft 8, sound emission
Grease is scribbled between sensor 11 and main shaft 8；
C) by Frequency Converter Control can rotating A motors 15 and B motors 27, stretching steel wire rope 39 until B tension force sense
Device 38 and A tension sensors 41 reach initial set value；
D) rotating speed, frequency, corner amplitude and the steering of A motors 15 and B motors 27 are set by frequency converter, to main drum 40
Upper both ends of steel wire rope 39 apply different tensioning loads, by A tension sensors 41, B tension sensors 38, torque sensor 3,
First foil gauge 43, the second foil gauge 9, high-speed camera 10 and acoustic emission sensor 11 record the both sides of main drum 40 in real time respectively
Moment of torsion, concentrfated load and bending load, the upper flange plate crack initiation of main shaft 8 or the extension that the dynamic loading of steel wire rope 39, main shaft 8 are subject to
Situation；After the cycle-index of setting is reached, A motors 15 and B motors 27 are closed, stops experiment；
E) change A motor support bases 16, the position of A support blocks 20, B motor support bases 25 and B support blocks 32 on bottom plate 26, obtain
Different it must enclose cornerite；
F) repeat step c) and d), in the case of research difference encloses cornerite, the both ends Tension Difference of steel wire rope 39 on main drum 40, carry
Affecting laws of the lotus form to the bending composite fatigue derogatory behaviour of main shaft 8.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
- A kind of 1. km deep-well main shaft of hoister bending composite fatigue damage monitoring device, it is characterised in that：Including pedestal, main shaft Device, loading system and condition monitoring system, main shaft device and loading system are arranged on pedestal, and condition monitoring system is arranged on On main shaft device；The main shaft device includes main shaft (8), and main drum (40) is provided with the middle part of main shaft (8), and main shaft (8) is provided with ring flange, main Reel (40) both sides mounting flange, Wound steel rope (39) in main drum (40) grooving, main shaft (8) one end is provided with A bearings (7), main shaft (8) other end is held (12) provided with B axle, and A bearings (7) are placed in A bearing blocks (6), and B axle holds (12) and is placed in B axle bearing (13) in；The loading system includes the first loading system and the second loading system, and the first loading system includes A support shafts (18) and A Motor (15), is provided with A reels (42) in the middle part of A support shafts (18), and steel wire rope (39) one ends wound is in A reels (42) grooving, A branch Support axle (18) one end is provided with C bearings (35) and C shaft couplings (17), and A support shafts (18) other end is provided with D bearings (36), C bearings (35) it is placed in C bearing blocks (19), D bearings (36) are placed in D bearing blocks (21), C shaft couplings (17) and A motors (15) output shaft It is connected, second loading system includes B support shafts (23) and B motors (27), and B reels (37) are provided with the middle part of B support shafts (23), Steel wire rope (39) other end is wound in B reels (37) grooving, and B support shafts (23) one end is provided with E bearings (31) and B shaft couplings (24), B support shafts (23) other end is provided with F bearings (33), and E bearings (31) are placed in E bearing blocks (30), and F bearings (33) are placed in F In bearing block (34), B shaft couplings (24) are connected with B motors (27) output shaft；The condition monitoring system includes tension monitoring system, stress measurement system, torch measuring system, crack monitoring system, Tension monitoring system includes A tension sensors (41) and B tension sensors (38), and A tension sensors (41) are arranged on main drum (40) on the steel wire rope (39) between A reels (42), B tension sensors (38) are arranged on main drum (40) and B reels (37) Between steel wire rope (39) on, stress measurement system includes the first foil gauge (43) for being pasted onto on ring flange and is pasted onto main shaft (8) the second foil gauge (9) on, torch measuring system include torque sensor (3), torque sensor (3) one end and A flange shafts (2) connect, torque sensor (3) other end is connected with B flange shafts (4), and A flange shafts (2) pass through G bearings (1), B flange shafts (4) It is connected by A shaft couplings (5) with main shaft (8) end, crack monitoring system includes high-speed camera (10) and acoustic emission sensor (11)。
- 2. a kind of km deep-well main shaft of hoister bending composite fatigue damage monitoring device according to claim 1, it is special Sign is：The pedestal includes bottom plate (26), the first support post (14) and the second support post being arranged on bottom plate (26) (28) the fixation angle steel (22) that, is arranged between bottom plate (26) and the first support post (14) bottom and it is arranged on the first support Column (14) and the bearing beam (29) on the second support post (28) top.
- 3. a kind of km deep-well main shaft of hoister bending composite fatigue damage monitoring device according to claim 2, it is special Sign is：The A bearing blocks (6) and B axle bearing (13) are fixed on bearing beam (29) by screw, C bearing blocks (19) and D Bearing block (21) is fixed by screws in A support blocks (20), and A support blocks (20) are bolted on bottom plate (26), A electricity Machine (15) is arranged on bottom plate (26) by A motor support bases (16), and E bearing blocks (30) and F bearing blocks (34) are fixed by screw In B support blocks (32), B support blocks (32) are bolted on bottom plate (26), and B motors (27) pass through B motor support bases (25) it is arranged on bottom plate (26), G bearings (1) are installed on bearing beam (29).
- 4. the km deep-well main shaft of hoister bending composite fatigue damage monitoring method of monitoring device according to claim 3, It is characterised in that it includes following steps：A) A motor support bases (16), A support blocks (20), B motor support bases (25) and B support blocks (32) are adjusted on bottom plate (26) Position, obtain and enclose cornerite setting value between steel wire rope (39) and main drum (40)；B) the first foil gauge (43) is pasted onto in flange disc side, the second foil gauge (9) is pasted onto the master close to ring flange Axle (8) outer surface, by high-speed camera (10) alignment flange disc side, acoustic emission sensor (11) is placed in main shaft (8) appearance Face；C) by Frequency Converter Control can rotating A motors (15) and B motors (27), stretching steel wire rope (39) until B tension force pass Sensor (38) and A tension sensors (41) reach initial set value；D) rotating speed, frequency, corner amplitude and the steering of A motors (15) and B motors (27) are set by frequency converter, to main drum (40) steel wire rope (39) both ends apply different tensioning loads on, by A tension sensors (41), B tension sensors (38), turn round Square sensor (3), the first foil gauge (43), the second foil gauge (9), high-speed camera (10) and acoustic emission sensor (11) are respectively Record main drum (40) both sides steel wire rope (39) dynamic loading, main shaft (8) is subject in real time moment of torsion, concentrfated load and bending load, Main shaft (8) upper flange plate crack initiation or spread scenarios；After the cycle-index of setting is reached, A motors (15) and B motors are closed (27) experiment, is stopped；E) A motor support bases (16), A support blocks (20), B motor support bases (25) and B support blocks (32) are changed on bottom plate (26) Position, obtain difference and enclose cornerite；F) repeat step c) and d), in the case of research difference encloses cornerite, steel wire rope (39) both ends Tension Difference on main drum (40), carry Affecting laws of the lotus form to main shaft (8) bending composite fatigue derogatory behaviour.
- 5. km deep-well main shaft of hoister bending composite fatigue damage monitoring method according to claim 4, its feature exist In：In step a), the cornerite that encloses should be less than being equal to 195 °.
- 6. km deep-well main shaft of hoister bending composite fatigue damage monitoring method according to claim 4, its feature exist In：In step b), grease is scribbled between acoustic emission sensor (11) and main shaft (8).
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