CN107389251A - Mechanical digging machine model machine digging force is test bed - Google Patents
Mechanical digging machine model machine digging force is test bed Download PDFInfo
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- CN107389251A CN107389251A CN201710853820.9A CN201710853820A CN107389251A CN 107389251 A CN107389251 A CN 107389251A CN 201710853820 A CN201710853820 A CN 201710853820A CN 107389251 A CN107389251 A CN 107389251A
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- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 239000000523 sample Substances 0.000 claims abstract description 16
- 239000011888 foil Substances 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 abstract description 4
- 210000000515 tooth Anatomy 0.000 description 22
- 238000000034 method Methods 0.000 description 6
- 238000005065 mining Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 241000602850 Cinclidae Species 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
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Abstract
The invention discloses a kind of mechanical digging machine model machine digging force is test bed, lifting motor, pushing motor, hoisting drum, pushing roller are connected on testing stand base, swing arm is hinged with testing stand base, and lifting motor is connected with hoisting drum, is pushed motor and is connected with pushing roller；Dipper is hinged with swing arm, and device for measuring force is detachably connected on dipper front end；Boom hoist cable is fixed on hoisting drum after bypassing swing arm pulley, scraper bowl pulley；Push steel wire rope one end to be fixed on pushing roller, the other end is fixed on dipper around bearing pin pulley；Lifting speed probe is connected with lifting motor, pushes speed probe and is connected with pushing motor, angular sensor and displacement transducer are connected with articulated mounting；Control system is electrically connected with lifting motor, pushing motor, articulated mounting, device for measuring force respectively.The present invention can be with the actual working state of analog mechanical formula excavator, and carries out excavation test along the track planned.
Description
Technical field
The invention belongs to engineer machinery test apparatus field, is surveyed more particularly, to a kind of mechanical digging machine model machine digging force
Try testing stand.
Background technology
In discontinuous surface mining overburden operation and mining digging operation, mechanical digging machine plays an important role,
And with the maturation of full-blown transport vehicle technology, the mechanical digging machine of big bucket capacity has big yield, efficiency high, is produced into
This low advantage, particularly with large-scale strip mining transformation, winning equipment maximizes the paces developed faster, macromechanical excavator
The emphasis of equipment manufacture is turned into.In the design process of mechanical digging machine, the maximum digging force of excavator is that reaction is dug
Dig one of major parameter of machine operation performance, and be operated apparatus structure design and the foundation of Strength co-mputation, mostly on
Leading indicator of the research of digger operating device using digging force as its analysis, calculating and optimization design, to excavator
One, which is also served as, during progress performance test predominantly detects index.
For macromechanical excavator, to improve product design performance, shortening product development cycle and improving work
Efficiency is, it is necessary to test its digging force, to design optimal equipment and find out optimal working method.In
State's patent disclose No. CN2033855033U disclose it is a kind of load or digging type engineering machinery digging force is test bed, should
Method is fairly simple, but can not effectively simulate real operating environments, the accurate digging force for measuring excavator.Chinese patent discloses
No. CN105067172A discloses a kind of power shovel forces testing device and method of testing, can simply measure scraper bowl by
Power, but it is unable to the size of effecting reaction digging force.
The content of the invention
Instant invention overcomes the deficiencies in the prior art part, and it is an object of the present invention to provide a kind of mechanical digging machine model machine digging force
Test bed, this mechanical digging machine model machine digging force is test bed can be with the real work of analog mechanical formula excavator
State, and excavation test is carried out along the track planned, measure digging force of the mechanical digging machine under various working conditions.
The purpose of the present invention is achieved through the following technical solutions, with reference to accompanying drawing：
A kind of mechanical digging machine model machine digging force is test bed, including testing stand base 1, lifting motor 2, pushing electricity
Machine 4, hoisting drum 6, push roller 8, swing arm 10, articulated mounting, dipper 13, device for measuring force 14, swing arm pulley 15, scraper bowl pulley
16th, bearing pin pulley 17, lifting speed probe 19, pushing speed probe 20, angular sensor 21, displacement transducer
22nd, the first synchronization belt transmission system 231, the second synchronization belt transmission system 232, first push steel wire rope 241, second and push steel wire
Rope 242, boom hoist cable 25, control system；The testing stand base 1 is placed in ground, and lifting motor 2, pushing motor 4 are pacified respectively
On testing stand base 1, hoisting drum 6, pushing roller 8 are connected on testing stand base 1 by bearing respectively, the bottom of swing arm 10
End is be hinged with testing stand base 1, and lifting motor 2 is connected by the first synchronization belt transmission system 231 with the input of hoisting drum 6,
Motor 4 is pushed by the second synchronization belt transmission system 232 with pushing the input of roller 8 to be connected；Dipper 13 by articulated mounting with
Swing arm 10 is be hinged, and device for measuring force 14 is detachably connected on the front end of dipper 13；Swing arm pulley 15 is fixed on the top of swing arm 10, and scraper bowl is slided
Wheel 16 is articulated with the top of device for measuring force 14, and bearing pin pulley 17 is fixed on articulated mounting；Boom hoist cable 25 bypasses swing arm pulley
15th, its both ends is both secured on hoisting drum 6 after scraper bowl pulley 16；First pushing one end of steel wire rope 241 along being fixed on clockwise
Push on roller 8, other end is fixed on the non-scraper bowl end of dipper 13 around bearing pin pulley 17；Second pushes steel wire rope 242
One end be fixed on counterclockwise push roller 8 on, other end is fixed on the scraper bowl end of dipper 13 around bearing pin pulley 17；Carry
Rise the input of speed probe 19 with the output end of lifting motor 2 to be connected, it is defeated with pushing motor 4 to push the input of speed probe 20
Shaft is connected, and the input of angular sensor 21 is connected with articulated mounting, and displacement transducer 22 is fixed on articulated mounting；Control
System processed is electrically connected with lifting motor 2, pushing motor 4, articulated mounting, device for measuring force 14 respectively.
A kind of described mechanical digging machine model machine digging force is test bed, and articulated mounting includes contiguous block 11 and pin
Axle, contiguous block 11 are fixed with bearing pin 12 by jackscrew, and bearing pin 12 is connected by sliding bearing with the swing arm 10, and dipper 13 passes through
Sliding bearing is connected with contiguous block 11.
A kind of described mechanical digging machine model machine digging force is test bed, and the non-scraper bowl end of dipper 13 is fixed with first
Limited block 181, the scraper bowl end of scraper bowl 13 are fixed with the second limited block 182；Majority first pushes the one end of steel wire rope 241 along clockwise
It is fixed on and pushes on roller 8, other end is fixed on the first limited block 181 around bearing pin pulley 17；Second pushes steel wire rope
242 one end is fixed on counterclockwise to be pushed on roller 8, and other end is around on the fixation of bearing pin pulley 17 and the second limited block 182.
A kind of described mechanical digging machine model machine digging force is test bed, control system include the first frequency converter 261,
Second frequency converter 262, signal amplifier 27, controller 28, dynamic strain indicator 30, computer 31；First frequency converter 261, second becomes
The input of frequency device 262 is electrically connected with controller 28, and the output end of the first frequency converter 261 is connected with lifting motor 2, the second frequency converter
262 output ends are connected with pushing motor 4；The one end of signal amplifier 27 is connected with controller 28, the other end of signal amplifier 27 with
Displacement transducer 22 electrically connects；Dynamic strain indicator 30 electrically connects with controller 28, the input of dynamic strain indicator 30 and the dynamometry
Device 14 electrically connects；Controller 28 is connected by USB interface with computer 31.
A kind of described mechanical digging machine model machine digging force is test bed, and device for measuring force 14 includes device for measuring force base
141st, cantilever beam sensor 142, connection fixing block 143, bucket tooth seat and cantilever beam sensor 144, bucket tooth 145；Cantilever beam senses
The one end of device 142 is fixed on device for measuring force base 141, and bucket tooth seat and cantilever beam sensor 144 are fixed by connection fixing block 143
In the other end of cantilever beam sensor 142, bucket tooth 145 is bolted on bucket tooth seat and cantilever beam sensor 144；Cantilever beam
The outer surface of sensor 142 is pasted with two groups of foil gauge groups, and the outer surface of bucket tooth seat and cantilever beam sensor 144 is pasted with the 3rd
Group foil gauge group, three groups of foil gauge groups pass through access control system after bridge box composition full-bridge respectively.
A kind of described mechanical digging machine model machine digging force is test bed, and the bottom of testing stand base 1 is provided with counterweight.
A kind of described mechanical digging machine model machine digging force is test bed, and lifting motor 2 is respectively mounted with pushing motor 4
There is locking system.
The invention provides a kind of mechanical digging machine model machine digging force is test bed, the testing stand can be with analog machine
The working condition of tool formula excavator, and the track to having planned is tested, and measures mechanical digging machine in various working conditions
Under digging force, while performance parameter of the mechanical digging machine under various working conditions can be measured.
Brief description of the drawings
Fig. 1 is the test bed dimensional structure diagram of mechanical digging machine model machine digging force of the present invention.
Fig. 2 is the top view of the present invention.
Fig. 3 is the partial sectional view of the present invention
Fig. 4 is the dimensional structure diagram of device for measuring force of the present invention.
Fig. 5 is the upward view of device for measuring force of the present invention.
Fig. 6 is the right view of device for measuring force of the present invention.
Fig. 7 is bucket tooth seat of the present invention and cantilever beam sensor paster schematic diagram.
Fig. 8 is bucket tooth seat of the present invention and cantilever beam sensor bridge circuit schematic diagram.
In figure：1- testing stand bases；2- lifting motors；3- lifting motor bases；4- pushes motor；5- pushes motor bottom
Seat；6- hoisting drums；7- hoisting drum bearing blocks；8- pushes roller；9- pushes roller bearing seat；10- swing arms；11- contiguous blocks；
12- bearing pins；13- dippers；14- device for measuring force；141- device for measuring force bases；142- cantilever beam sensors；143- connection fixing blocks；
144- bucket tooths seat and cantilever beam sensor；145- bucket tooths；15- swing arm pulleys；16- scraper bowl pulleys；17- bearing pin pulleys；181-
One limited block；The limited blocks of 182- second；19- lifts speed probe；20- pushes speed probe；The 21- anglecs of rotation sense
Device；22- displacement transducers；The synchronization belt transmission systems of 231- first；The synchronization belt transmission systems of 232- second；241- first pushes steel
Cord；242- second pushes steel wire rope；25- boom hoist cables；The frequency converters of 261- first；The frequency converters of 262- second；27- signals are put
Big device；28- controllers；291- the first bridge boxes；292- the second bridge boxes；The bridge boxes of 293- the 3rd；30- dynamic strain indicators；31- computers.
Embodiment
Technical scheme is discussed in detail below in conjunction with accompanying drawing：
As shown in Figure 1, Figure 2, Figure 3 shows, mechanical digging machine model machine digging force is test bed, including testing stand base 1, carries
Lifting motor 2, lifting motor base 3, push motor 4, push motor base 5, hoisting drum 6, hoisting drum bearing block 7, pushing
Roller 8, push roller bearing seat 9, swing arm 10, contiguous block 11, bearing pin 12, dipper 13, device for measuring force 14, swing arm pulley 15, shovel
Struggle against pulley 16, bearing pin pulley 17, the first limited block 181, the second limited block 182, lifting speed probe 19, pushing revolution speed sensing
Device 20, angular sensor 21, displacement transducer 22, the first synchronization belt transmission system 231, the second synchronization belt transmission system
232nd, first the pushing of steel wire rope 241, second steel wire rope 242, boom hoist cable 25, the first frequency converter 261, the second frequency converter are pushed
262nd, signal amplifier 27, controller 28, the first bridge box 291, the second bridge box 292, the 3rd bridge box 293, dynamic strain indicator 30, electricity
Brain 31.
Testing stand base 1 is placed in ground, lifting motor 2, pushes motor 4 respectively by lifting motor base 3 and pushing
The bolt of motor base 5 is fixed on testing stand base 1.Hoisting drum bearing is fixed on examination by the bolt of hoisting drum bearing block 7
Test on platform base 1, push roller bearings and be fixed on by pushing the bolt of roller bearing seat 9 on testing stand base 1, hoisting drum 6,
Roller 8 is pushed to be fixed on hoisting drum bearing block 7 by jackscrew respectively and push on roller bearing seat 9.The bottom of swing arm 10 with
Testing stand base 1 is be hinged.Contiguous block 11 is fixed with bearing pin 12 by jackscrew, and bearing pin 12 is connected by sliding bearing with swing arm 10,
Dipper 13 is connected with contiguous block 11 by sliding bearing, and its top has an optical axis parallel with itself, optical axis both ends and bucket
Bar both ends are fixed by bolt, are coordinated by optical axis and the upper end U-type groove of contiguous block 11 to limit turn of dipper vertically
It is dynamic, dipper 13 is only existed the movement on axial direction relative to contiguous block 11.First limited block 181 is secured by bolts in dipper 13
Non- scraper bowl end, the second limited block 182 is secured by bolts in the scraper bowl end of dipper 13, and device for measuring force 14 passes through connecting rod and spiral shell
Bolt is fixed on the front end of dipper 13, and swing arm pulley 15 is fixed on the top of swing arm 10, and scraper bowl pulley 16 is articulated with the top of device for measuring force 14,
Bearing pin pulley 17 is fixed to be secured by bolts on testing stand base 1 with bearing pin 12, lifting speed probe 19, its input
It is connected by yielding coupling with the output end of lifting motor 2, pushes speed probe 20 and be secured by bolts in testing stand base 1
On, its input is connected by yielding coupling with pushing the output shaft of motor 4, and angular sensor 21 is secured by bolts in
Swing arm 10 and the hinged place of contiguous block 11, its input are connected with bearing pin 12 by yielding coupling, and displacement transducer 22 passes through spiral shell
Bolt is fixed on contiguous block 11, and its traction end is secured by bolts in the scraper bowl end of dipper 13, and lifting motor 2 passes through the first timing belt
Transmission system 231 is connected with the input of hoisting drum 6, pushes motor 4 by the second synchronization belt transmission system 232 with pushing roller
8 inputs are connected, and boom hoist cable 25 is secured by bolts in lifting around its both ends after swing arm pulley 15, scraper bowl pulley 16
On roller 6；Along being fixed on clockwise on pushing roller 8, other end bypasses bearing pin pulley 17 for first pushing one end of steel wire rope 241
It is fixed on the first limited block 181, is responsible for the pushing of dipper 13；One end of second pushing steel wire rope 242 is fixed on counterclockwise to push away
On pressure roller 8, other end is fixed with the second limited block 182, being responsible for the withdrawal of dipper, rolling pushing around bearing pin pulley 17
Cylinder 8 can be respectively completed the control to the push-and-pull of dipper 13 in rotating.First frequency converter 261, the second frequency converter 262, signal
Amplifier 27 and dynamic strain indicator 30 electrically connect with controller 28 respectively, wherein the output end of the first frequency converter 261 and lifting motor 2
It is connected, the output end of the second frequency converter 262 is connected with pushing motor 4, the other end of signal amplifier 27 and displacement transducer 22
Electrical connection；The input of dynamic strain indicator 30 connects the first bridge box 291, the second bridge box 292 and the 3rd respectively using shielded cable
Bridge box 293, and cable external shield line is connected with bridge box earth terminal；Controller 28 is connected by USB interface with computer 31.
Lifting motor 2 is respectively arranged with locking system with pushing motor 4, avoids producing slip in off working state dipper.
There is counterweight in testing stand base 1, its bottom, avoid the testing stand in test process from tumbling.
As shown in Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8, device for measuring force 14 of the invention, include device for measuring force base 141,
Cantilever beam sensor 142, connection fixing block 143, bucket tooth seat and cantilever beam sensor 144, bucket tooth 145；Filled for the ease of dynamometry
14 dismounting and replacing is put, device for measuring force base 141 is fixed on the front end of dipper 13, cantilever beam sensing using connecting rod and bolt
The one end of device 142 is secured by bolts on device for measuring force base 141, and bucket tooth seat and cantilever beam sensor 144 are by being connected
Block 143 and bolt are fixed on the other end of cantilever beam sensor 142, and by cantilever beam sensor 142 and bucket tooth seat and cantilever
The outside face of beam sensor 144 is grounded to exclude electromagnetic interference, and bucket tooth 145 is fixed on bucket tooth seat by bolt and cantilever beam senses
On device 144, bucket tooth 145 is detachable, the convenient size and bucket tooth for testing the different digging forces under different working condition of bucket tooth 145
145 abrasion condition, device for measuring force 14 are changed to scraper bowl, the convenient test to other performances of mechanical digging machine equipment.
The outer surface of cantilever beam sensor 142 is pasted with two groups of foil gauge groups, and first group of foil gauge group is by foil gauge R1, should
Become piece R2, foil gauge R3, foil gauge R4Composition, access in dynamic strain indicator 30, be used for after forming full-bridge by the first bridge box 291
The size F of scraper bowl digging force is measured, second group of foil gauge group is by foil gauge R5, foil gauge R6, foil gauge R7, foil gauge R8Composition,
Being accessed after forming full-bridge by the second bridge box 292 in dynamic strain indicator 30, second group of foil gauge group surveys data and plays verification,
The outer surface of bucket tooth seat and cantilever beam sensor 104 is pasted with foil gauge R respectively9, foil gauge R10, foil gauge R11, foil gauge
R12, it is deformed into the combined deformation of bending and compression, and its compression can be eliminated with vertical direction patch foil gauge by using horizontal
Caused deformation, foil gauge R9To foil gauge R12Access in dynamic strain indicator 30, survey after forming full-bridge by the 3rd bridge box 293
Obtain the reaction force F in x directions suffered by bucket toothx, according to formula F=Fx+FyF can be drawnySize, it is big by the direction component of x and y two
The small direction that can draw F with joint efforts.Interference in measurement process be present, the present invention uses two methods exclusive PCR, first, should
Become piece and shielded cable is used by the line of bridge box access dynamic strain indicator, cable external shield line is connected with bridge box, second, handle
Cantilever beam sensor 142 and the outside face of bucket tooth seat and cantilever beam sensor 144 are grounded respectively, exclude magnetic and electric disturbances.
The course of work of the present invention is as follows：
Line is carried out to testing equipment first, motor carries out the control of output speed, cantilever beam sensor by frequency converter
142 need advanced rower to determine, and deformation signal is input to dynamic strain indicator 30, then is gathered by controller 28, and controller 28 of the present invention is adopted
With the cRIO of NI companies, the control signal of frequency converter is exported by controller 28, lifting speed probe 19, pushes speed probe
20 and angular sensor 21 is powered by cRIO 9361 modules and data acquisition, displacement transducer 22 it is defeated
Go out signal and first pass through signal amplifier 27, then gathered by controller 28, the signal gathered is handled by computer 31.Start
It is determined before motor firstly the need of the initial position to device for measuring force 14, determines the crown of initial position bucket tooth 145 and bearing pin 12
The distance between center and dipper 13 and are determined to rotating speed needed for motor relative to the angle of testing stand base 1, according to
Optimize that obtained track is counter to be pushed away, obtain the lifting speed of device for measuring force 14 and the speed of the pushing of dipper 13, pass through lifting
And pushing speed can obtain the rotating speed needed for roller, be driven between roller and motor by timing belt, pass through gearratio
Carry out that output speed needed for motor is calculated.Testing stand is placed in front of material, adjusts testing stand base 1 relative to material
Position, to be excavated, startup power supply, control scraper bowl to reach the position initially excavated, computer 31 manually by computer 31
Control program is run, rotating speed needed for input, starts motor, lifting motor 2 rotates, and passes through key transmission belt movable belt pulley, output shaft band
Wheel drives hoisting drum 6 by toothed belt transmission, and hoisting drum 6, which rotates, drives boom hoist cable motion to carry device for measuring force 14
Rise, the positive and negative rotation for pushing roller 8 drives pushing steel wire rope dipper 13 is carried out push-and-pull, by the lifting of device for measuring force 14 with pushing away
Pressure completes the excavation to material.Stop motor after the completion of excavation, the now automatic locking of band-type brake in motor, motor output shaft is not sent out
It is raw to rotate, device for measuring force is fixed on final position.Angular sensor 21 can reflect dynamometry with displacement transducer 22
14 real mining track of device, excavated so as to which particular locations in mining process compared with simulation track, can be measured
The size of power.
Angular sensor 21 and displacement transducer 22, real-time mining track, bearing pin 12 are drawn using polar coordinate system
Center is the limit of polar coordinate system, regards pole axis, 21 angle measurements of angular sensor as along the ray of the downward vertical direction of limit
It is the polar diameter of the real time position of measurement apparatus 14 to spend for the polar angle of the real time position of measurement apparatus 14, the Len got of displacement transducer 22.
The control of motor uses closed loop control system, and testing stand uses two kinds of control systems.The first basis first
Trajectory calculation goes out required motor speed, and the output speed of motor is acquired by controller 28, after collection with required rotating speed
It is compared, deviation input fuzzy controller is then drawn into the control voltage needed for frequency converter, then enter by controller 28
Row control, complete after once testing, the track drawn by angular sensor 21 and displacement transducer 22, with required track
It is compared.Second is to add angular sensor 21 and displacement transducer 22 in the loop on the premise of the first,
By real-time track compared with theory locus, deviation is calculated, deviation input fuzzy controller is drawn into frequency converter
Required voltage, control voltage calculates with being multiplied by weight coefficient respectively as the control voltage obtained by trajector deviation as obtained by rotating speed deviation
Go out final Frequency Converter Control voltage.
Claims (7)
1. a kind of mechanical digging machine model machine digging force is test bed, it is characterised in that including testing stand base (1), lifting
Motor (2), push motor (4), hoisting drum (6), push roller (8), swing arm (10), articulated mounting, dipper (13), dynamometry dress
Put (14), swing arm pulley (15), scraper bowl pulley (16), bearing pin pulley (17), lifting speed probe (19), pushing revolution speed sensing
Device (20), angular sensor (21), displacement transducer (22), the first synchronization belt transmission system (231), the second timing belt pass
Dynamic system (232), first push steel wire rope (241), the second pushing steel wire rope (242), boom hoist cable (25), control system；
The testing stand base (1) is placed in ground, and lifting motor (2), pushing motor (4) are separately mounted to testing stand base (1)
On, hoisting drum (6), pushing roller (8) are connected on testing stand base (1) by bearing respectively, swing arm (10) bottom and examination
It is be hinged to test platform base (1), lifting motor (2) passes through the first synchronization belt transmission system (231) and hoisting drum (6) input phase
Even, motor (4) is pushed by the second synchronization belt transmission system (232) with pushing roller (8) input to be connected；Dipper (13) passes through
Articulated mounting is be hinged with swing arm (10), and device for measuring force (14) is detachably connected on dipper (13) front end；Swing arm pulley (15) is fixed
On swing arm (10) top, scraper bowl pulley (16) is articulated with above device for measuring force (14), and bearing pin pulley (17) is fixed on articulated mounting
On；Boom hoist cable (25) is around swing arm pulley (15), its both ends is both secured on hoisting drum (6) scraper bowl pulley (16) afterwards；
Along being fixed on clockwise on pushing roller (8), other end is solid around bearing pin pulley (17) for first pushing steel wire rope (241) one end
Due on the non-scraper bowl end of dipper (13)；One end of second pushing steel wire rope (242) is fixed on counterclockwise to be pushed on roller (8),
Other end is fixed on the scraper bowl end of dipper (13) around bearing pin pulley (17)；Speed probe (19) input is lifted with carrying
Lifting motor (2) output end is connected, and pushes speed probe (20) input and is connected with pushing motor (4) output shaft, the anglec of rotation
Sensor (21) input is connected with articulated mounting, and displacement transducer (22) is fixed on articulated mounting；Control system respectively with
Lifting motor (2), push motor (4), articulated mounting, device for measuring force (14) electric connection.
2. a kind of mechanical digging machine model machine digging force as claimed in claim 1 is test bed, it is characterised in that the hinge
Connection device includes contiguous block (11) and bearing pin (12), and contiguous block (11) is fixed with bearing pin (12) by jackscrew, and bearing pin (12) passes through
Sliding bearing is connected with the swing arm (10), and dipper (13) is connected by sliding bearing with contiguous block (11).
3. a kind of mechanical digging machine model machine digging force as claimed in claim 1 is test bed, it is characterised in that the bucket
The non-scraper bowl end of bar (13) is fixed with the first limited block (181), and the scraper bowl end of scraper bowl (13) is fixed with the second limited block (182)；
Majority first pushes steel wire rope (241) one end along being fixed on clockwise on pushing roller (8), and other end bypasses bearing pin pulley
(17) it is fixed on the first limited block (181)；One end of second pushing steel wire rope (242) is fixed on counterclockwise pushes roller (8)
On, other end is around on bearing pin pulley (17) fixation and the second limited block (182).
4. a kind of mechanical digging machine model machine digging force as claimed in claim 1 is test bed, it is characterised in that the control
System processed includes the first frequency converter (261), the second frequency converter (262), signal amplifier (27), controller (28), dynamic strain
Instrument (30), computer (31)；First frequency converter (261), the second frequency converter (262) input electrically connect with controller (28), the
One frequency converter (261) output end is connected with lifting motor (2), and the second frequency converter (262) output end is connected with pushing motor (4)；
Signal amplifier (27) one end is connected with controller (28), and signal amplifier (27) other end is electrically connected with displacement transducer (22)
Connect；Dynamic strain indicator (30) electrically connects with controller (28), dynamic strain indicator (30) input and the device for measuring force (14) electricity
Connection；Controller (28) is connected by USB interface with computer (31).
5. a kind of mechanical digging machine model machine digging force as claimed in claim 1 is test bed, it is characterised in that the survey
Power apparatus (14) includes device for measuring force base (141), cantilever beam sensor (142), connection fixing block (143), bucket tooth seat and hanged
Arm beam sensor (144), bucket tooth (145)；Cantilever beam sensor (142) one end is fixed on device for measuring force base (141), bucket tooth
Seat and cantilever beam sensor (144) are fixed on cantilever beam sensor (142) other end, bucket tooth by connection fixing block (143)
(145) it is bolted on bucket tooth seat and cantilever beam sensor (144)；Paste the outer surface of cantilever beam sensor (142)
There are two groups of foil gauge groups, the outer surface of bucket tooth seat and cantilever beam sensor (144) is pasted with the 3rd group of foil gauge group, three groups of strains
Piece group passes through access control system after bridge box composition full-bridge respectively.
6. a kind of mechanical digging machine model machine digging force as claimed in claim 1 is test bed, it is characterised in that the examination
Test platform base (1) bottom and be provided with counterweight.
7. a kind of mechanical digging machine model machine digging force as claimed in claim 1 is test bed, it is characterised in that described to carry
Lifting motor (2) is mounted on locking system with pushing motor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853820.9A CN107389251A (en) | 2017-09-20 | 2017-09-20 | Mechanical digging machine model machine digging force is test bed |
Applications Claiming Priority (1)
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| CN112378564A (en) * | 2020-11-16 | 2021-02-19 | 北京航空航天大学 | Real-time fault monitoring system for space bucket teeth of mining face shovel excavator and identification method thereof |
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| CN115371858A (en) * | 2022-08-03 | 2022-11-22 | 中联重科股份有限公司 | Signal processing method, system and device and measuring method of pin shaft sensing assembly |
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