CN110068514A - The tension-torsion composite fatigue test device and its test method of heavily loaded drag conveyor round-link chain - Google Patents
The tension-torsion composite fatigue test device and its test method of heavily loaded drag conveyor round-link chain Download PDFInfo
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- CN110068514A CN110068514A CN201910171418.1A CN201910171418A CN110068514A CN 110068514 A CN110068514 A CN 110068514A CN 201910171418 A CN201910171418 A CN 201910171418A CN 110068514 A CN110068514 A CN 110068514A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
Abstract
The invention discloses the tension-torsion composite fatigue test devices and its test method of a kind of heavily loaded drag conveyor round-link chain, and device includes rack, torsional load loading system, tensile load loading system, monitoring system.Test device disclosed by the invention can found the fatigue experiment under ring progress tension-torsion complex conditions to annulus chain link-, the stretching and torsional load that monitoring round-link chain is born, the fissuring rate situation of dynamic monitoring round-link chain monitors the abrasion loss of vertical ring-flat ring contact position.The damage failure mechanism under annulus vertical chain ring-flat ring tension-torsion complex conditions is studied in realization, and the reliability design and safe military service life prediction to drag conveyor are of great significance.
Description
Technical field
The present invention relates to mining industry technical fields, and in particular to a kind of tension-torsion composite fatigue of heavy duty drag conveyor round-link chain
Test device and method.
Background technique
Fully mechanized mining technology is current state-of-the-art mining Technology Underground, and drag conveyor is crucial one of fully-mechanized mining equipment,
It not only plays Coal Transport effect, while being also the running track of coalcutter.With the continuous development of fully mechanized mining technology, Yi Jikuang
Enlargement and the deep layer of well, drag conveyor constantly develop to high-power, long haul distance and high chain speed direction, i.e., heavily loaded scraper plate
Conveyer.Once heavily loaded drag conveyor will lead to the halt production of coal working face because of malfunction and failure, and then lead to large coal mine
Heavy economic losses.
Heavily loaded drag conveyor utilizes chain conveyer principle, under the driving of driving motor, fluid coupling and speed reducer, to scrape
Respectively as traction mechanism and supporting mechanism, sprocket wheel drives the scraper chain of electrodeless closure company of doing in intermediate channel for plate chain and intermediate channel
Coal in intermediate channel is transported to head unloading by tail by continuous shuttling movement.Important set as drag conveyor traction mechanism
At part, round-link chain (flat ring and vertical ring) is sequentially connected composition chain drive system.In drag conveyor operational process, due to chain
It is frequently switched on or shuts down when transmission system polygon effect, fully loaded or overload and the abnormal loads such as coal wall caving and coal wall are caving
Vibration and impact characteristics are presented in effect, round-link chain, and then it is caused to bear the effect of time-varying dynamic tension；Coal cinder unevenly falls, is more
Side shape effect and abnormal load will lead to round-link chain straightway contiguous links along annulus chain axis relative torsion, generate simultaneously
Alternating torsion load.The coupling of contact load between time-varying dynamic tension, alternating torsion load, relative twisting movement, chain link
Under, fretting wear and fatigue damage occur for round-link chain, cause round-link chain bearing capacity to decline, when the amount of damage of round-link chain reaches pole
Chain rupture accident will occur when limit value.According to statistics, 41.5% drag conveyor shutdown and is drawn as caused by round-link chain chain rupture
The service life for turning round round-link chain under complex conditions will be considerably shorter than pure extension load working condition, therefore, develop circle under a kind of tension-torsion complex conditions
The damage of ring vertical chain ring-flat ring (abrasion and fatigue damage) monitoring system, studies the damage failure mechanism of round-link chain, to scraping
The reliability design of plate conveyer and safe military service life prediction are of great significance.
Have at present for the damage monitoring testing machine of drag conveyor chain drive system: Patent No. 201610566788.1
A kind of fretting corrosion fatigue experimental device of disclosed heavily loaded drag conveyor round-link chain, realizes heavily loaded drag conveyor round-link chain
Fretting corrosion fatigue experiment；Heavily loaded Chain Wheel of Flight Bar Conveyor under a kind of vibratory impulse disclosed in the patent No. 201610852686.6
Fatigue under scrubbing monitoring device realizes heavily loaded Chain Wheel of Flight Bar Conveyor fatigue under scrubbing experiment.
In above-mentioned testing machine, fail to consider that annulus chain link-founds the torsional load that ring is born, monitoring system fails reality
The real-time monitoring of existing round-link chain displacement field, fissuring rate.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of heavily loaded drag conveyor circle
The tension-torsion composite fatigue test device and method of loop chain carry out the tension-torsion fatigue experiment of round-link chain, while dynamic monitoring round-link chain
Dynamic tension, torque, torsion angle, displacement field and the Dynamic Crack Propagation of (flat ring and vertical ring), detect the abrasion loss of round-link chain, with solution
Certainly the deficiencies in the prior art, easy to operate, measurement result is comprehensively reliable.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of tension-torsion composite fatigue test device of heavy duty drag conveyor round-link chain, including rack, torsional load loading system,
Tensile load loading system, monitoring system；
The rack includes at least three rack units, is the first rack unit, the second rack unit and third rack list respectively
Member, wherein the tensile load driving device of load tensile load is used to support on the first rack unit；
Fixed guide rail is used to support on second rack unit；
Torsion driving device, angular transducer bracket and combination bearing seat are used to support on third rack unit；
Connector is passed sequentially through between first rack unit, the second rack unit and third rack unit to be connected and fixed；
The torsional load loading system includes torsion driving device, combination bearing, combination bearing seat, round-link chain jockey,
Wherein, torsion driving device is connected by bracket with third rack unit, reverse driving device output shaft pass through shaft coupling and
Transition axis is connected；
Combination bearing is connected by combination bearing seat with third rack unit, and transition axis passes through combination bearing and tension sensor phase
Even；The other end of tension sensor is connected with round-link chain jockey；
The tensile load loading system includes tensile load driving device, anti-torsion sliding block, fixed U-bolt, guide rail, wherein
Tensile load driving device, which is connected through a screw thread, to be fixed on the first rack unit；It is anti-to turn round sliding block and tensile load driving device
Drive shaft is connected through a screw thread, and realizes the transmitting of tensile load；
Fixed U-bolt is connected with anti-torsion sliding block, realizes that the tensile load of round-link chain applies；
Anti- torsion sliding block is slidably arranged on the guide rail, for bearing the torsional load of round-link chain transmitting so far, prevents hydraulic cylinder
Piston rod bears torsional load；
The monitoring system includes tension sensor, torque sensor, angular transducer, controller and Non-contact strain measurement system
System, wherein
The tension sensor is arranged between round-link chain jockey and transition axis, bears for real-time measurement round-link chain dynamic
State pulling force；
The torsion sensor is arranged on the output shaft between torsion driving device and transition axis, is used for real-time measurement round-link chain
Torque；
The angular transducer is arranged on the output shaft of torsion driving device, the windup-degree for real-time measurement round-link chain；
The controller is connect with the tension sensor, torsion sensor and angular transducer signal；
It is flat to monitor round-link chain in experimentation for the displacement field of round-link chain when the Non-contact strain measurement system is used to obtain experiment
The fissuring rate situation of ring and vertical ring.
The anti-torsion sliding block includes that a horizontally disposed connecting plate and one are fixedly connected on the riser of connecting plate upper surface,
Wherein, the bottom both ends of horizontally disposed connecting plate pass through slide respectively and are slidably connected with guide rail, and the riser is equipped with and is used for
The threaded hole being threadedly coupled with the drive shaft of tensile load driving device.
The combination bearing is needle roller and thrust ball combination bearing.
The tensile load driving device is hydraulic cylinder, and hydraulic cylinder, which is connected through a screw thread, to be fixed on the first rack unit,
The piston rod of anti-torsion sliding block and hydraulic cylinder is connected through a screw thread, and realizes the transmitting of tensile load.
The torsion driving device is torsion motor, and there are two output shaft, one of output shafts for the torsion motor tool
Angular transducer is connected, another output shaft is connected by shaft coupling with transition axis.
The controller is computer.
The Non-contact strain measurement system is VIC-3D measuring system.
A kind of test method of the tension-torsion composite fatigue test device based on the heavily loaded drag conveyor round-link chain, including
Following steps:
Round-link chain one end is connect by step 1 with round-link chain jockey, and the other end is connect with fixed U-bolt；
Step 2 controls tensile load driving device by controller, applies scheduled initial tensile force to round-link chain；
Step 3 returns to zero to tension sensor, torque sensor, angular transducer, starts Non-contact strain measurement system；
Step 4, by controller control tensile load driving device and torsion driving device respectively to round-link chain apply it is scheduled
It stretches and torsional fatigue load；
Step 5, the output signal for acquiring tension sensor, torque sensor and angular transducer are simultaneously recorded on controller；
Step 6, the displacement field that round-link chain when testing is obtained by Non-contact strain measurement system, monitor round-link chain in experimentation
The fissuring rate situation of flat ring and vertical ring；
Step 7 carries out wire cutting processing to the round-link chain after experiment, obtains the sample at flat ring and vertical ring contact position, passes through
Contourgraph obtains the wear morphology of round-link chain, and then obtains the abrasion loss of round-link chain.
The utility model has the advantages that
A kind of tension-torsion composite fatigue test device of heavily loaded drag conveyor round-link chain provided by the invention, can be flat to round-link chain
Ring-stands the fatigue experiment under ring progress tension-torsion complex conditions, the stretching and torsional load that monitoring round-link chain is born, dynamic monitoring
The fissuring rate situation of round-link chain monitors the abrasion loss of vertical ring-flat ring contact position.It realizes flat to annulus vertical chain ring-
Damage failure mechanism under ring tension-torsion complex conditions is studied, reliability design and safe service life to drag conveyor
Prediction is of great significance.The present invention solves the deficiencies in the prior art, easy to operate, and intuitive measurement results, comprehensively, can
It leans on.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the tension-torsion composite fatigue test device of the heavily loaded drag conveyor round-link chain of the present invention；
Fig. 2 is the anti-structural representation for turning round sliding block of tension-torsion composite fatigue test device of the heavily loaded drag conveyor round-link chain of the present invention
Figure；
Fig. 3 is the rack construction schematic diagram of the tension-torsion composite fatigue test device of the heavily loaded drag conveyor round-link chain of the present invention；
Fig. 4 is that the anti-torsion sliding block of the tension-torsion composite fatigue test device of the heavily loaded drag conveyor round-link chain of the present invention is connect with guide rail
Schematic diagram；
In figure, the 1, first rack unit, 2, hydraulic cylinder, the 3, second rack unit, 4, anti-torsion sliding block, 5, fixed U-bolt, 6, lead
Rail, 7, VID-3D measuring system, 8, round-link chain jockey, 9, S type tension sensor, 10, transition axis, 11, combination bearing seat,
12, angular transducer bracket, 13, angular transducer, 14, torsion motor, 15, electric machine support, 16, torque sensor, 17, combination
Bearing, 18, torsional load loading system bracket, 19, flat ring, 20, vertical ring, 21, connecting plate.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
As shown in Figure 1, a kind of heavy duty drag conveyor round-link chain tension-torsion composite fatigue test device, including rack, torsion
Load loading system, tensile load loading system, monitoring system；
The rack includes the first rack unit 1, the second rack unit 3, third rack unit 18；Wherein, the first rack unit 1
It is used to support the hydraulic cylinder 2 of load tensile load；Second rack unit is used to support guide rail 6；Third rack unit 18 is for branch
Support torsion motor 14, angular transducer bracket 12, combination bearing seat 10；First rack unit 1, the second rack unit 3 and third
The connecting plate 21 that rack unit 18 passes sequentially through side is connected with each other by screw thread；
The torsional load loading system includes torsion motor 14, combination bearing 17, combination bearing seat 11, round-link chain jockey
8, wherein torsion motor is connected by electric machine support 15 with load loading system rack 18 is twisted off, motor has there are two output shaft,
One of output shaft connects angular transducer 13, and angular transducer 13 can realize the real-time measurement of 14 windup-degree of motor, separately
One output shaft is connected by shaft coupling with transition axis 10 and torque sensor 16, and torque sensor can realize round-link chain torque
Real-time measurement；Combination bearing 17 is connected by combination bearing seat 11 with 18 rack of torsional load loading system, and combination bearing 17 can
The effect of tensile load is born, to prevent torsion motor 14 from bearing the effect of pulling force, transition axis 10 is across combination bearing and S type
Tension sensor 9 is connected；The other end of S type tension sensor 9 is connected with round-link chain jockey 8, and S type tension sensor 9 can
Realize that round-link chain bears the real-time measurement of dynamic tension；
The tensile load loading system includes loading hydraulic cylinder 2, anti-torsion sliding block 4, fixed U-bolt 5, guide rail 6, wherein hydraulic
Cylinder 2 is connected through a screw thread on fixed and the first rack unit 1；Anti- torsion sliding block 4 and the piston rod of hydraulic cylinder 2 are connected through a screw thread,
Realize the transmitting of tensile load；Fixed U-bolt 5 is connected with anti-torsion sliding block 4, realizes that the tensile load of round-link chain applies；Anti- torsion
Sliding block 4 is fixed on guide rail 6, for bearing the torsional load of round-link chain transmitting so far, prevents 2 piston rod of hydraulic cylinder from bearing torsion
Load；Guide rail 6, which is connected through a screw thread, to be fixed on the second rack unit；
The monitoring system includes that S type tension sensor 8, torque sensor 16, angular transducer 13, computer and VIC-3D are surveyed
Amount system 7, wherein
The S type tension sensor is arranged between round-link chain jockey and transition axis, bears for real-time measurement round-link chain
Dynamic tension；
The torsion sensor is arranged on the output shaft between torsion driving device and transition axis, is used for real-time measurement round-link chain
Torque；
The angular transducer is arranged on the output shaft of torsion driving device, the windup-degree for real-time measurement round-link chain；
The controller is connect with the S type tension sensor, torsion sensor and angular transducer signal；
The displacement field of round-link chain when the VIC-3D measuring system 7 is used to obtain experiment, monitors annulus chain link in experimentation
With the fissuring rate situation of vertical ring.
A kind of test method of the tension-torsion composite fatigue test device of heavy duty drag conveyor round-link chain, including following step
It is rapid:
(1) round-link chain is connected to the fixation position at both ends, i.e., respectively at fixed U-bolt 5 and 8 phase of round-link chain jockey
Even；
(2) hydraulic cylinder 2 is controlled by controller, scheduled initial tensile force is applied to round-link chain；
(3) it returns to zero to S type tension sensor 9, torque sensor 16, angular transducer 13, starts VIC-3D measuring system
7；
(4) hydraulic cylinder 2 is controlled by computer and torsion motor 14 applies scheduled stretching and torsional fatigue to round-link chain respectively
Load, and then time-varying dynamic tension, alternating torsion load and the relative twisting movement of round-link chain are simulated, further produce chain interannular
Raw contact load；
(5) output signal of sensor is collected and recorded on computer, obtains the stretching and torsion that round-link chain is born when testing
Reprint lotus；
(6) displacement field of annulus can be into one in conjunction with the material parameter of round-link chain when obtaining experiment by VIC-3D measuring system 7
The acquisition round-link chain of step strains in real time, stress field, monitors the crack initiation of annulus chain link 19 and vertical ring 20 in experimentation
And spread scenarios；
(7) wire cutting processing is carried out to the round-link chain after experiment, obtains the sample at flat ring and vertical ring contact position, passes through three-dimensional
Contourgraph obtains the wear morphology of round-link chain, and then obtains the abrasion loss of round-link chain.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of tension-torsion composite fatigue test device of heavy duty drag conveyor round-link chain, which is characterized in that including rack, torsion
Load loading system, tensile load loading system, monitoring system；
The rack includes at least three rack units, is the first rack unit, the second rack unit and third rack list respectively
Member, wherein the tensile load driving device of load tensile load is used to support on the first rack unit；
Fixed guide rail is used to support on second rack unit；
Torsion driving device, angular transducer bracket and combination bearing seat are used to support on third rack unit；
Connector is passed sequentially through between first rack unit, the second rack unit and third rack unit to be connected and fixed；
The torsional load loading system includes torsion driving device, combination bearing, combination bearing seat, round-link chain jockey,
Wherein, torsion driving device is connected by bracket with third rack unit, reverse driving device output shaft pass through shaft coupling and
Transition axis is connected；
Combination bearing is connected by combination bearing seat with third rack unit, and transition axis passes through combination bearing and tension sensor phase
Even；The other end of tension sensor is connected with round-link chain jockey；
The tensile load loading system includes tensile load driving device, anti-torsion sliding block, fixed U-bolt, guide rail, wherein
Tensile load driving device, which is connected through a screw thread, to be fixed on the first rack unit；It is anti-to turn round sliding block and tensile load driving device
Drive shaft is connected through a screw thread, and realizes the transmitting of tensile load；
Fixed U-bolt is connected with anti-torsion sliding block, realizes that the tensile load of round-link chain applies；
Anti- torsion sliding block is slidably arranged on the guide rail, for bearing the torsional load of round-link chain transmitting so far, prevents hydraulic cylinder
Piston rod bears torsional load；
The monitoring system includes tension sensor, torque sensor, angular transducer, controller and Non-contact strain measurement system
System, wherein
The tension sensor is arranged between round-link chain jockey and transition axis, bears for real-time measurement round-link chain dynamic
State pulling force；
The torsion sensor is arranged on the output shaft between torsion driving device and transition axis, is used for real-time measurement round-link chain
Torque；
The angular transducer is arranged on the output shaft of torsion driving device, the windup-degree for real-time measurement round-link chain；
The controller is connect with the tension sensor, torsion sensor and angular transducer signal；
It is flat to monitor round-link chain in experimentation for the displacement field of round-link chain when the Non-contact strain measurement system is used to obtain experiment
The fissuring rate situation of ring and vertical ring.
2. the tension-torsion composite fatigue test device of heavy duty drag conveyor round-link chain according to claim 1, feature exist
In the anti-torsion sliding block includes that a horizontally disposed connecting plate and one are fixedly connected on the riser of connecting plate upper surface, wherein
The bottom both ends of horizontally disposed connecting plate pass through slide respectively and are slidably connected with guide rail, the riser be equipped with for stretching
The threaded hole that the drive shaft of load driving device is threadedly coupled.
3. the tension-torsion composite fatigue test device of heavy duty drag conveyor round-link chain according to claim 1, feature exist
In the combination bearing is needle roller and thrust ball combination bearing.
4. the tension-torsion composite fatigue test device of heavy duty drag conveyor round-link chain according to claim 1, feature exist
In the tensile load driving device is hydraulic cylinder, and hydraulic cylinder, which is connected through a screw thread, to be fixed on the first rack unit, and anti-torsion is slided
The piston rod of block and hydraulic cylinder is connected through a screw thread, and realizes the transmitting of tensile load.
5. the tension-torsion composite fatigue test device of heavy duty drag conveyor round-link chain according to claim 1, feature exist
In the torsion driving device is torsion motor, and there are two output shaft, one of output shaft joint angles for the torsion motor tool
Sensor is spent, another output shaft is connected by shaft coupling with transition axis.
6. the tension-torsion composite fatigue test device of heavy duty drag conveyor round-link chain according to claim 1, feature exist
In the controller is computer.
7. the tension-torsion composite fatigue test device of heavy duty drag conveyor round-link chain according to claim 1, feature exist
In the Non-contact strain measurement system is VIC-3D measuring system.
8. a kind of test method of the tension-torsion composite fatigue test device based on the heavily loaded drag conveyor round-link chain, feature
It is, comprising the following steps:
Round-link chain one end is connect by step 1 with round-link chain jockey, and the other end is connect with fixed U-bolt；
Step 2 controls tensile load driving device by controller, applies scheduled initial tensile force to round-link chain；
Step 3 returns to zero to tension sensor, torque sensor, angular transducer, starts Non-contact strain measurement system；
Step 4, by controller control tensile load driving device and torsion driving device respectively to round-link chain apply it is scheduled
It stretches and torsional fatigue load；
Step 5, the output signal for acquiring tension sensor, torque sensor and angular transducer are simultaneously recorded on controller；
Step 6, the displacement field that round-link chain when testing is obtained by Non-contact strain measurement system, monitor round-link chain in experimentation
The fissuring rate situation of flat ring and vertical ring；
Step 7 carries out wire cutting processing to the round-link chain after experiment, obtains the sample at flat ring and vertical ring contact position, passes through
Contourgraph obtains the wear morphology of round-link chain, and then obtains the abrasion loss of round-link chain.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910171418.1A CN110068514B (en) | 2019-03-07 | 2019-03-07 | Tension-torsion composite fatigue testing device and method for circular chain of heavy-duty scraper conveyor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910171418.1A CN110068514B (en) | 2019-03-07 | 2019-03-07 | Tension-torsion composite fatigue testing device and method for circular chain of heavy-duty scraper conveyor |
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| CN110068514B CN110068514B (en) | 2021-08-24 |
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| CN110068514B (en) | 2021-08-24 |
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