CN107917791A - Endless-track vehicle plays comprehensive actuator main shaft repeated impact test method in step gear shifting - Google Patents
Endless-track vehicle plays comprehensive actuator main shaft repeated impact test method in step gear shifting Download PDFInfo
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- CN107917791A CN107917791A CN201711118872.8A CN201711118872A CN107917791A CN 107917791 A CN107917791 A CN 107917791A CN 201711118872 A CN201711118872 A CN 201711118872A CN 107917791 A CN107917791 A CN 107917791A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
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Abstract
The present invention is based on motor driving rack platform, fixed by output terminal and ground to simulate the braking ability under armored vehicle brake step gear shifting operating mode, simple possible, effect uses, strong operability, Armored tracklayer comprehensive actuator final drive shaft impact fatigue characteristic (including impact fatigue intensity and step gear shifting index of aging) can be obtained, so as to examine the design and use defect of main transmission to provide foundation.Meanwhile the invention puts main shaft and shock loading problem is considered in complete machine environment, feasible scheme and research technique not only are provided for the test of main shaft shock loading and main shaft tooth root impact fatigue research, also provides the instrument of can verify that for the inertia shock calculation of driving-chain.
Description
Technical field
The invention belongs to test simulation technical field, is related to a kind of Armored tracklayer comprehensive biography in the case where playing step gear shifting operating mode
Final drive shaft repeated impact test method in dynamic device.
Background technology
Important component of the comprehensive actuator as Armored tracklayer, it collects the functions such as traveling, speed change, steering, braking
In one；Its performance directly affects the driving performances such as acceleration, braking, steering and the climbing of Armored tracklayer, its reliability is straight
Connecing influences Armored tracklayer service life.The failure of comprehensive actuator, it will make Armored tracklayer lose fighting capacity.
Main shaft in endless-track vehicle comprehensive actuator is that it realizes the pass weight part of major function, and realizes that moment of torsion passes
The core part passed, be not only able to transmit straight when power output, turn to when confluence torque and hydraulic retarder braking
Torque etc., the shock loading etc. during also subject to starting, gearshift, its torsional load born have that codomain is wide, dynamic is strong and
The features such as shock loading is big.The quality of main shaft directly influences the performance of comprehensive actuator, and then influences the use of vehicle, such as
Fruit main shaft breaks down, and will result directly in vehicle and loses power, can not travel.
Experiment for Armored tracklayer transmission shaft, especially final drive shaft, the country are special mostly according to national standard
Chief shaft experimental bench on complete, mainly pass through the stress of the analog main shafts such as hydraulic pressure, electromagnetism and motor, load change frequency
It is smaller, the dynamic loading of static load or large cyclic is fallen within substantially, can not verify babinet miscellaneous part to main shaft at all
Influence, vehicle operating mode is also introduced not in experimental test, the shock loading for playing step gear shifting operating mode is considered can be less.
It is external to complete dynamic loading experiment according to the road spectrum set in advance mostly, should and test method experiment it is comprehensive compared with
By force, it is weaker to playing step gear shifting operating mode specific aim, and for the shock loading of main shaft, mainly rely on powerful software to calculate analysis,
Verified on real vehicle, also seldom realized in laboratory.
Therefore, comprehensive actuator main shaft under a kind of Armored tracklayer initial starting shift operating mode how is designed on testing stand
Repeated impact test method becomes technical problem urgently to be resolved hurrily.
The content of the invention
(1) goal of the invention
The purpose of the present invention is：How a kind of Armored tracklayer initial starting shift operating mode under comprehensive biography is designed on testing stand
Dynamic device main shaft repeated impact test method.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of endless-track vehicle to play comprehensive actuator main shaft in step gear shifting
Repeated impact test method, it comprises the following steps：
S1, in two output terminals of comprehensive actuator final drive shaft connect two torquemeters respectively, or is passed comprehensive
Two output terminals of dynamic device final drive shaft paste foil gauge；And torquemeter or foil gauge are passed through into signal conductor and collecting device
It is connected；
S2, fix two output terminals of comprehensive actuator final drive shaft on the base mounting plate, or passes through brake apparatus handle
The output wheel braking of both sides is dead, during realizing vehicle shift starting under brake state peak torque simulation；
S3, be input to the external characteristic curve MAP chart of engine in the control unit of power motor, is started with this to simulate
The output characteristics of machine, realizes simulation of the power motor to engine output characteristics；
S4, by handle cable, connection shift handle and the shift module on comprehensive actuator are comprehensive to simulate with this
The gear switch of transmission device is closed, to realize vehicle shift functional simulation；
S5, start power motor, power motor rotating speed is equal to the idling of engine on real vehicle, in tri- kinds of T1, T2, T3 not
With under operating temperature, shift handle is operated, is respectively completed " -1 grade of neutral gear ", " -2 grades of neutral gear " and " neutral gear -1 grade " three kinds of startings
Each 20 times of gearshift experiment under operating mode, wherein, T1, T2, T3 are respectively the common three kinds of operating temperatures of comprehensive actuator；
S6, the size by final drive shaft arranged on left and right sides impulsive torque in collecting device record whole process, to every in S5
20 Secondary Shocks moments of torsion under kind operating mode obtain final drive shaft impulsive torque average value；The impulsive torque that contrast final drive shaft is tried to achieve is put down
Average, finds the operating mode of impulsive torque average value maximum；
S7, find the impulsive torque that on the left of the corresponding final drive shaft of impulsive torque average value maximum duty and right side measures
Average value, is expressed as TMain shaft is left、TMain shaft is right, the ratio for calculating left and right sides is TMain shaft is left/TMain shaft is right；
S8, according to main shaft left and right sides rigidity, the impulsive torque value that final drive shaft left and right sides theoretical calculation obtains is calculated
RespectivelyThe ratio of left and right sides is
S9, contrast " the ratio T of final drive shaft left side and right side impulsive torque average valueMain shaft is left/TMain shaft is right" and " final drive shaft is left
The impulsive torque ratio that right side theoretical calculation obtains
S10, analysis comparing result：
If TMain shaft is left/TMain shaft is rightWithBasically identical, i.e., error range is within 10%, then it is assumed that is determined in S6
Operating mode is operating condition of test, so as to obtain the operating mode of starting shift shock load maximum under certain temperature；
If TMain shaft is left/TMain shaft is rightWithInconsistent, i.e. error range then needs to reexamine foil gauge more than 10%
State or re-scale torquemeter, then re-start the measurement of S5-S7；
S11, according to the operating condition of test determined in S10, be repeatedly performed under definite operating condition of test at interval of 8-10 seconds
Once test, after n times to be done, comprehensive actuator is carried out to disassemble inspection, flaw detection, N=are carried out to main shaft
5000—10000。
Wherein, in the step S1, the selection principle of foil gauge is：According to the diameter of axle of patch location, elasticity modulus of materials,
And the peak torque that can be transmitted, the foil gauge of selection coefficient of strain K=1.8~2.2.
Wherein, in the step S1, foil gauge connects for full-bridge, and sticking temperature sensor, measuring point determine before experiment；Strain
The paste position of piece will be pasted onto at left and right sides of final drive shaft on tooth root axle journal, and collecting device is connected to by signal conductor
On corresponding voltage channel.
Wherein, the selection principle of collecting device is：Range is 3-5 times of maximum steady state load, and precision reaches 0.5%, adopts
Sample rate is more than 1KHz.
Wherein, in the step S2, two output terminals of comprehensive actuator final drive shaft are fixed on base using frock
On seat board, the frock includes：Curved tooth covers fixed plate 1, and one end connection comprehensive actuator output terminal, one end is welded on curved tooth set
In fixed plate；Internal spline curved tooth set 2, upper end welding internal spline curved tooth set, lower end is welded on bottom plate；Bottom plate 3, passes through lower margin spiral shell
Bolt is fixed in pedestal version.
Wherein, in the step S2, the operating procedure of frock is：Covered first by internal spline curved tooth and comprehensive actuator
Export gear with curved teeth connection；Secondly, it is vertical with pedestal version to adjust curved tooth set fixed plate, bottom plate and pedestal version flat contact；Finally, lead to
Foundation bolt is crossed to be fixed in pedestal version special tooling.
Wherein, in the step S11, during experiment, the situation of change of shock loading is observed, if impulsive torque is less than
During starting experiment impulsive torque 70%), stop experiment, it is believed that final drive shaft has failed, and record is shifted gears number this moment.
Wherein, in the step S11, M experiment post analysis result of the test is completed, if finding after applying shock loading n times,
Final drive shaft is cracked, should stop testing, then it is assumed that final drive shaft has begun to fail；Final drive shaft does not find crackle, then
Think that final drive shaft does not start to fail；And again return to step S11 and continue to test；When loading number is more than 50,000 final drive shafts
It is cracked not yet, illustrate that final drive shaft does not start to fail, should also stop testing, judge that final drive shaft reaches design objective；Its
In, 10000 ＜ M≤50000.
Wherein, in the step S11, if it is determined that final drive shaft has occurred and that failure, then final drive shaft is carried out stress and
Structural analysis.
(3) beneficial effect
The endless-track vehicle that above-mentioned technical proposal is provided plays comprehensive actuator main shaft repeated impact test side in step gear shifting
Method, rack platform is driven based on motor, is fixed by output terminal and ground and is played step gear shifting operating mode to simulate armored vehicle brake
Under braking ability, simple possible, effect use, strong operability, can obtain the main biography of Armored tracklayer comprehensive actuator
Moving axis impact fatigue characteristic (including impact fatigue intensity and rise step gear shifting index of aging), thus for examine the design of main transmission and
Foundation is provided using defect.Meanwhile the invention puts main shaft and shock loading problem is considered in complete machine environment, not only impacted for main shaft
Load test and main shaft tooth root impact fatigue research provide feasible scheme and research technique, are also impacted for the inertia of driving-chain
Offer is provided and can verify that instrument.
Brief description of the drawings
Fig. 1 testing program flow charts；
Fig. 2 fixing tool design drawings；
Fig. 3 comprehensive actuator main shaft schematic diagrames；
Fig. 4 rack hardware platform schematic diagrames.
Embodiment
To make the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to the tool of the present invention
Body embodiment is described in further detail.
(1) performance analysis
It is the sliding wear by main clutch come complete for the common vehicle for being equipped with manual transmission when starting
The process of power connector is disconnected into the power between engine and vehicle drive wheels, the load that this process transmission main shaft is subject to
Lotus is a process slowly increased, and impact of the operating mode for gearbox is smaller.Such as the load that manual transmission main shaft is subject to
Lotus can be expressed as：
Tfc=T1+T2
Wherein：T1The torque on main shaft is acted on for all component rotating speeds；T2Engine is loaded into turning for main shaft during to start to walk
Square.During due to stationary vehicle, clutch turns the power cut between engine and gearbox, each structure of transmission internal
Speed is zero, is pretended with the T on main shaft1It is zero；And T2It is the torque that engine is delivered to by clutch on transmission main shaft,
It is a slow process, impact value very little.
And the development of the automatic gear-box with assembling fluid torque-converter, more and more Armored tracklayers pass through fluid power
Torque-converters realizes the power shift of vehicle.The comprehensive actuator armored vehicle of fluid torque-converter is equipped with when starting,
Driver is needed to slam brake pedal, vehicle is in on-position；Then by gear shifting handle comprehensive actuator from neutral gear
It is switched in drive shift or reverse gear.Since this process synthesis transmission device possesses fluid torque-converter, power is realized not
Discontinuous transmission, when gearbox is neutral gear, the structure rotation of neutral gear, to transmission main shaft torques T1It is not zero, sends out at the same time
Motivation is to the dynamic output T of gearbox2Also it is not zero；When gearbox is some drivable position, the rotation structure of neutral gear becomes
It is zero, the structure of drivable position starts to rotate, and since this process time is shorter, therefore is subject on comprehensive actuator final drive shaft
Shock loading.Main shaft bearing torque can also be expressed as：
Tfc=T1+T2 (1)
Wherein：T1--- make the torque that all component rotating speeds are zero；
T2--- engine is loaded into the moment of torsion on main shaft during starting.
(2) embodiment
Armored tracklayer of the present invention plays comprehensive actuator final drive shaft fatigue test method under step gear shifting operating mode, including
Following steps：
S1, in two output terminals of comprehensive actuator final drive shaft connect the moments of torsion of two large range high precisions respectively
Instrument, or directly foil gauge is pasted in two output terminals of comprehensive actuator final drive shaft；Then by signal conductor with adopting
Collection equipment is connected；
S2, fix two output terminals of comprehensive actuator final drive shaft on the base mounting plate with special tooling, or passes through
Brake apparatus the output wheels of both sides is braked it is dead, during realizing vehicle shift starting under brake state peak torque mould
Intend；
S3, be input to the external characteristic curve MAP chart of engine in the control unit of power motor, is started with this to simulate
The output characteristics of machine, realizes simulation of the power motor to engine output characteristics；
S4, by handle cable, connection shift handle and the shift module on comprehensive actuator are comprehensive to simulate with this
The gear switch of transmission device is closed, to realize vehicle shift functional simulation；
S5, start power motor, make power motor rotating speed be equal to real vehicle on engine idling, T1, T2, T3 (T1,
T2, T3 are respectively the common three kinds of operating temperatures of comprehensive actuator) at a temperature of three kinds of different operatings, shift handle is operated, point
Wan Cheng not each 20 times of gearshift experiment under " -1 grade of neutral gear ", " -2 grades of neutral gear " and " neutral gear-fall 1 grade " three kinds of starting operating modes；
S6, the size by final drive shaft arranged on left and right sides impulsive torque in collecting device record whole process, to every in S5
20 Secondary Shocks moments of torsion under kind operating mode obtain final drive shaft impulsive torque average value；The impulsive torque that contrast final drive shaft is tried to achieve is put down
Average, finds the operating mode of impulsive torque average value maximum；
S7, find the impulsive torque that on the left of the corresponding final drive shaft of impulsive torque average value maximum duty and right side measures
Average value, is expressed as TMain shaft is left、TMain shaft is right, the ratio for calculating left and right sides is TMain shaft is left/TMain shaft is right；
S8, according to main shaft left and right sides rigidity, the impact that final drive shaft left and right sides theoretical calculation obtains can be calculated and turn round
Square value is respectivelyThe ratio of left and right sides is
S9, contrast " the ratio T of final drive shaft left side and right side impulsive torque average valueMain shaft is left/TMain shaft is right" and " final drive shaft is left
The impulsive torque ratio that right side theoretical calculation obtains
S10, comparing result analysis：
If TMain shaft is left/TMain shaft is rightWithBasically identical (error range is within 10%), then it is assumed that determined in S6
Operating mode is operating condition of test, thus obtain rising under certain temperature (such as Ti, i=1,2,3) step gear shifting (neutral gear-J is kept off, J=1 grades, 2 grades,
1 grade) operating mode of shock loading maximum；
If TMain shaft is left/TMain shaft is rightWithInconsistent (error range is more than 10%), then need to reexamine foil gauge
State or re-scale torquemeter, then re-start the measurement of S5-S7；
If repeatedly measure TMain shaft is left/TMain shaft is rightWithIt is or inconsistent, then it is assumed that test method and theoretical calculation side
Method is incompatible.
S11, according in S10 determine operating condition of test, as at a temperature of Ti (i=1,2,3) neutral gear-J gear (J=1 grades, 2 grades,
1 grade) shock loading it is maximum, be repeatedly performed at interval of 8-10 seconds under definite operating condition of test and once test, N to be done
After secondary (N=5000-10000), comprehensive actuator is carried out to disassemble inspection, flaw detection is carried out to main shaft；
S12, test result analysis：
The selection principle of foil gauge is in step S1：According to the diameter of axle of patch location, elasticity modulus of materials, and can transmit
Peak torque, choose the foil gauge of certain coefficient of strain (generally K=1.8-2.2).
The selection principle of collecting device is in step S1：Range is generally 3-5 times of maximum steady state load, and precision reaches
0.5%；Sample rate is greater than 1KHz.
It is safe and reliable in step S2 during fixing tool, big load is used when being connected with comprehensive actuator output terminal
Linked vector graph, is fixed when being connected with base plate with high-strength bolt, and contact plane is sufficiently large.
Step S11 is specially：
The situation of change of shock loading is observed, if impulsive torque becomes special hour relative to impulsive torque during firm start
(be less than impulsive torque when starting experiment 70%), should stop testing, then it is assumed that final drive shaft has failed, and record is shifted gears this moment
Number.If impulsive torque is little relative to change during firm start, should continue to test；
Step S11 completes the secondary experiment post analysis result of the tests of M (M≤50000), main if finding after applying shock loading n times
Transmission shaft is cracked, should stop testing, then it is assumed that final drive shaft has begun to fail；Final drive shaft does not find crackle, then recognizes
Do not start to fail for final drive shaft；And again return to step S11 and continue to test；When loading number is more than 50,000 final drive shafts still
It is not cracked, illustrate that final drive shaft does not start to fail, should also stop testing, judge that final drive shaft reaches design objective.
In step S11, if it is determined that final drive shaft has occurred and that failure, then stress and structural analysis are carried out to final drive shaft.
It is used for comprehensive actuator main shaft under the Armored tracklayer step gear shifting operating mode the present invention also provides a kind of
The special tooling of repeated impact test method, as shown in Figure 2, including：Curved tooth covers fixed plate 1, the comprehensive transmission dress of one end connection
Output terminal is put, one end is welded in curved tooth set fixed plate；Internal spline curved tooth set 2, upper end welding internal spline curved tooth set, lower end welding
On bottom plate；Bottom plate 3, is fixed in pedestal version by foundation bolt.
Embodiment
As shown in Figure 1, the present invention provides a kind of Armored tracklayer to play comprehensive actuator main shaft under step gear shifting operating mode
Repeated impact test method, including the repeated impact test condition of Armored tracklayer main shaft, test procedure, test method, inspection
Test specification.
To the requirement of testing equipment in repeated impact test condition：Test specimen frock includes power input terminal pad, and output is solid
Determine the auxiliary components such as frock；Output fixing tool can apply the torsion of forward and reverse direction；Each passage of test equipment sample frequency
Not less than 1KHz；Electric machine control system precision meets：± 2%.
Test requirements document：According to strain built-in testing moment of torsion, test system should calibrate before experiment, paste foil gauge before testing,
Foil gauge will be according to patch location the diameter of axle, elasticity modulus of materials, and the peak torque that can be transmitted chooses certain coefficient of strain
The foil gauge of (generally K=1.8-2.2), microstrain amount should ensure that about 1mV output voltages, foil gauge are in peak torque
Full-bridge connects, and sticking temperature sensor, measuring point determine before experiment；The paste position of foil gauge will be pasted onto final drive shaft or so two
Side is connected on the corresponding voltage channel of collecting device on tooth root axle journal by signal conductor.
Torquemeter range generally selects comprehensive actuator to live 3-5 times of transmission shaft maximum steady state load, and precision reaches
0.5%；Collecting device sample rate is greater than 1KHz, is connected to by signal conductor on the corresponding torque path of collecting device.
Bench simulation requirement：Two output terminals of comprehensive actuator are fixed on the base mounting plate with special tooling, or it is logical
Cross brake apparatus and the output wheels of both sides is braked dead, peak torque under brake state during realizing vehicle shift starting
Simulation；The external characteristic curve MAP chart of engine is input in the control unit of active motor, the defeated of simulated engine is come with this
Go out characteristic；Make driving unit consistent with the working status of engine during vehicle start, realize driving motor to engine idling
Simulation；Using shift handle complete gearshift function, carry out the gear switch of analog synthesis transmission device, with realize vehicle from neutral gear to
The gearshift function simulation of traveling gear.
The structure of special tooling：Special tooling is weldment, is mainly included：Curved tooth covers fixed plate 1, and one end connection is comprehensive to be passed
Dynamic device output terminal, one end are welded in curved tooth set fixed plate；Internal spline curved tooth set 2, upper end welding internal spline curved tooth set, lower end
It is welded on bottom plate；Bottom plate 3, together with curved tooth set fixed plate vertical welding.
Special tooling is covered by internal spline curved tooth first to be connected with comprehensive actuator output gear with curved teeth, secondly, adjusts arc
Tooth set fixed plate is vertical with pedestal version, bottom plate and pedestal version flat contact；Finally, special tooling is fixed on by foundation bolt
In pedestal version.
The principle of simulation of damped condition：Comprehensive actuator is all the power transmission of engine to master by a main shaft
On driving wheel, and the load that the base bearing is received mostlys come from the sum of each resistance of vehicle；
TResistance=(FResistance+FSystem)·R·i0 (2)
FResistance--- the drag overall of vehicle drive wheels；FSystem--- brake acts on the power on driving wheel；R --- driving wheel half
Footpath；i0--- side speed reducer gearratio；
When vehicle is neutral gear, TResistanceIt is very big, act on the output terminal of main shaft, principal shaft braking, at this time main shaft be only limited by
To the torque T of each structure1With the torque T of engine transmission2.When vehicle is converted to drivable position, due in this process
In, driver will step on the brake pedal of vehicle all the time, so when TResistanceStill very big, main shaft is still braked, but each structure pair
The torque T of main shaft1Change, and the time is shorter.
Test procedure is as follows：
In step S1, two large range high precisions are connected respectively in two output terminals of comprehensive actuator final drive shaft
Torquemeter, or directly foil gauge is pasted in two output terminals of comprehensive actuator final drive shaft；Then signal conductor is passed through
It is connected with collecting device.
In step S2, two output terminals of comprehensive actuator final drive shaft are fixed on the base mounting plate with special tooling,
Or final drive shaft both ends are braked by brake apparatus it is dead, it is maximum under brake state during realizing vehicle shift starting to turn round
The simulation of square.
In step S3, the external characteristic curve MAP chart of engine is input in the control unit of active motor, mould is come with this
Send out the output characteristics of motivation；Make power motor consistent with the working status of engine during vehicle start.
In step S4, by handle cable, connection shift handle and the shift module on comprehensive actuator, are come with this
The gear switch of analog synthesis transmission device, to realize the simulation of vehicle shift function；
In step S5, start power motor, power motor rotating speed is equal to the idling of engine on real vehicle, in T1, T2, T3
At a temperature of (T1, T2, T3 are respectively the common three kinds of operating temperatures of comprehensive actuator) three kinds of different operatings, operation gearshift hand
Handle, is respectively completed each 20 times of gearshift experiment under " -1 grade of neutral gear ", " -2 grades of neutral gear " and " neutral gear -1 grade " three kinds of starting operating modes；
In step S6, the size of final drive shaft arranged on left and right sides impulsive torque in whole process is recorded by collecting device, it is right
20 Secondary Shocks moments of torsion in S5 under every kind of operating mode obtain final drive shaft impulsive torque average value TMain shaft is averaged；Contrast final drive shaft is tried to achieve
Impulsive torque average value, find impulsive torque average value maximum (Tmax) operating mode；
In step S7, the impact that on the left of the corresponding final drive shaft of impulsive torque average value maximum duty and right side measures is found
The average value of moment of torsion, is expressed as TMain shaft is left、TMain shaft is right, the ratio for calculating left and right sides is TMain shaft is left/TMain shaft is right；
In step S8, the computational methods of main shaft left and right sides impulsive torque
From neutral gear to the principle of simulation of traveling gear：
Since vehicle is braked, the process of shift shock process, as transmission internal rotating member rotating speed vanishing is then right
In main shaft, according to momentum theorem, obtain：
T1T=J1'·ω1=(∑ in 2Jn)·ω5=∑ inJnωn (3)
Wherein：T-attack time；J1'-all components are converted to the rotary inertia on main shaft；in- n-th part to master
The gearratio of axis,JnThe rotary inertia of-n-th part；wnThe angular speed of-n-th part.
It can also be expressed as main shaft bearing torque：
Tfc=T1+T2 (4)
Wherein：T1--- make the torque that all component rotating speeds are zero；
T2--- engine is loaded into the moment of torsion on main shaft during starting.
Meanwhile main shaft is subject to TfcWhen, a torque part is used to overcome the rotation of main shaft controls in itself, remaining is acted on
Main shaft produces impact, i.e.,：
Tfc=TMain shaft controls+TImpact (5)
Then：
TImpact=T1-TMain shaft controls+T2 (6)
Play the calculating of step gear shifting main shaft left and right sides shock loading
1) it is n that engine, which is delivered to turbine rotating speed, when starting to walk0Rpm, after being suspended to traveling shelves, comprehensive actuator during straight
Output torque is TpNm, then turbine wheel shaft input torque is TcNm, obtains each Component Rotational Inertia and relative rotation speed is as shown in table 1.
1 Component Rotational Inertia of table and relative rotation speed
2) when impacting t=t0, each torque value for building and acting on main shaft can be calculated according to formula (3)-(6),
As shown in table 2.
The torque value of 2 each structure of table
| Nm | T1 | T2 | TMain shaft controls | Tfc | TImpact |
3) it is computed, the torsion stiffness at left and right sides of main shaft is as shown in table 3.
3 main shaft torsion stiffness value of table
4) according to main shaft left and right sides rigidity, the impact torque (T of main shaft controls can be calculatedImpact) it is delivered to main shaft and comprehensive
Torque when closing in transmission device output, as shown in table 4.
4 main shaft impact torque of table
In step S9, contrast " the ratio T of final drive shaft left side and right side impulsive torque average valueMain shaft is left/TMain shaft is right" and " main biography
The impulsive torque ratio that moving axis left and right sides is calculated”；
In step 10, determining to rise step gear shifting under certain temperature (such as Ti, i=1,2,3), (neutral gear-J is kept off, J=1 grade, 2 grades,
1 grade) operating mode of shock loading maximum；
In step S11, according to the operating condition of test determined in S10, as neutral gear-J keeps off (J=1 at a temperature of Ti (i=1,2,3)
Shelves, fall 1 grade by 2 grades) shock loading it is maximum, be repeatedly performed at interval of 10 seconds under definite operating condition of test and once test, treat
After completing n times (N=5000-10000), comprehensive actuator is carried out to disassemble inspection, flaw detection is carried out to main shaft；
In step S12, the secondary experiment post analysis result of the tests of M (M≤50000) are completed, if finding to apply shock loading n times
Afterwards, final drive shaft is cracked, should stop testing, then it is assumed that final drive shaft has begun to fail；Final drive shaft does not find crackle,
Then think that final drive shaft does not start to fail, and again return to step S11 and continue to test；When loading number is more than 50,000 main transmission
Axis is cracked not yet, illustrates that final drive shaft does not start to fail, should also stop testing, and judges that final drive shaft reaches design objective.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of endless-track vehicle plays comprehensive actuator main shaft repeated impact test method in step gear shifting, it is characterised in that including
Following steps：
S1, in two output terminals of comprehensive actuator final drive shaft connect two torquemeters respectively, or in comprehensive transmission dress
Two output terminals for putting final drive shaft paste foil gauge；And torquemeter or foil gauge are passed through into signal conductor and collecting device phase
Even；
S2, fix two output terminals of comprehensive actuator final drive shaft on the base mounting plate, or by brake apparatus both sides
Output wheel braking it is dead, during realizing vehicle shift starting under brake state peak torque simulation；
S3, be input to the external characteristic curve MAP chart of engine in the control unit of power motor, carrys out simulated engine with this
Output characteristics, realizes simulation of the power motor to engine output characteristics；
S4, by handle cable, connection shift handle and the shift module on comprehensive actuator, carry out analog synthesis with this and pass
The gear switch of dynamic device, to realize vehicle shift functional simulation；
S5, start power motor, power motor rotating speed is equal to the idling of engine on real vehicle, in tri- kinds of different works of T1, T2, T3
At a temperature of work, shift handle is operated, is respectively completed " -1 grade of neutral gear ", " -2 grades of neutral gear " and " neutral gear -1 grade " three kinds of starting operating modes
Lower gearshift is tested each 20 times, wherein, T1, T2, T3 are respectively the common three kinds of operating temperatures of comprehensive actuator；
S6, the size by final drive shaft arranged on left and right sides impulsive torque in collecting device record whole process, to every kind of work in S5
20 Secondary Shocks moments of torsion under condition obtain final drive shaft impulsive torque average value；The impulsive torque that contrast final drive shaft is tried to achieve is averaged
Value, finds the operating mode of impulsive torque average value maximum；
S7, find being averaged for the impulsive torque that on the left of the corresponding final drive shaft of impulsive torque average value maximum duty and right side measures
Value, is expressed as TMain shaft is left、TMain shaft is right, the ratio for calculating left and right sides is TMain shaft is left/TMain shaft is right；
S8, according to main shaft left and right sides rigidity, the impulsive torque value difference that final drive shaft left and right sides theoretical calculation obtains is calculated
ForThe ratio of left and right sides is
S9, contrast " the ratio T of final drive shaft left side and right side impulsive torque average valueMain shaft is left/TMain shaft is right" and " final drive shaft left and right sides
The impulsive torque ratio that theoretical calculation obtains
S10, analysis comparing result：
If TMain shaft is left/TMain shaft is rightWithBasically identical, i.e., error range is within 10%, then it is assumed that the operating mode determined in S6
For operating condition of test, so that the operating mode for the shift shock load maximum that obtains starting to walk under certain temperature；
If TMain shaft is left/TMain shaft is rightWithInconsistent, i.e. error range then needs to reexamine the shape of foil gauge more than 10%
State re-scales torquemeter, then re-starts the measurement of S5-S7；
S11, according to the operating condition of test determined in S10, be repeatedly performed once at interval of 8-10 seconds under definite operating condition of test
Experiment, after n times to be done, carries out comprehensive actuator to disassemble inspections, to main shaft progress flaw detection, N=5000-
10000。
2. endless-track vehicle as claimed in claim 1 plays comprehensive actuator main shaft repeated impact test method in step gear shifting, its
It is characterized in that, in the step S1, the selection principle of foil gauge is：According to the diameter of axle of patch location, elasticity modulus of materials, and
The peak torque that can be transmitted, chooses the foil gauge of coefficient of strain K=1.8~2.2.
3. endless-track vehicle as claimed in claim 2 plays comprehensive actuator main shaft repeated impact test method in step gear shifting, its
It is characterized in that, in the step S1, foil gauge connects for full-bridge, and sticking temperature sensor, measuring point determine before experiment；Foil gauge
Paste position will be pasted onto at left and right sides of final drive shaft on tooth root axle journal, and it is corresponding to be connected to collecting device by signal conductor
Voltage channel on.
4. endless-track vehicle as claimed in claim 3 plays comprehensive actuator main shaft repeated impact test method in step gear shifting, its
It is characterized in that, in the step S1, the selection principle of collecting device is：Range is 3-5 times of maximum steady state load, and precision reaches
0.5%, sample rate is more than 1KHz.
5. endless-track vehicle as claimed in claim 4 plays comprehensive actuator main shaft repeated impact test method in step gear shifting, its
It is characterized in that, in the step S2, two output terminals of comprehensive actuator final drive shaft is fixed on base plate using frock
On, the frock includes：Curved tooth covers fixed plate 1, and one end connection comprehensive actuator output terminal, one end is welded on curved tooth set and fixes
On plate；Internal spline curved tooth set 2, upper end welding internal spline curved tooth set, lower end is welded on bottom plate；Bottom plate 3, is consolidated by foundation bolt
It is scheduled in pedestal version.
6. endless-track vehicle as claimed in claim 5 plays comprehensive actuator main shaft repeated impact test method in step gear shifting, its
It is characterized in that, in the step S2, the operating procedure of frock is：Exported first by internal spline curved tooth set with comprehensive actuator
Gear with curved teeth connects；Secondly, it is vertical with pedestal version to adjust curved tooth set fixed plate, bottom plate and pedestal version flat contact；Finally, pass through ground
Foot bolt is fixed on special tooling in pedestal version.
7. endless-track vehicle as claimed in claim 6 plays comprehensive actuator main shaft repeated impact test method in step gear shifting, its
It is characterized in that, in the step S11, during experiment, observes the situation of change of shock loading, if impulsive torque is less than starting
During experiment impulsive torque 70%), stop experiment, it is believed that final drive shaft has failed, and record is shifted gears number this moment.
8. endless-track vehicle as claimed in claim 7 plays comprehensive actuator main shaft repeated impact test method in step gear shifting, its
It is characterized in that, in the step S11, M experiment post analysis result of the test is completed, if finding after applying shock loading n times, main biography
Moving axis is cracked, should stop testing, then it is assumed that final drive shaft has begun to fail；Final drive shaft does not find crackle, then it is assumed that
Final drive shaft does not start to fail；And again return to step S11 and continue to test；When loading number is more than 50,000 final drive shafts not yet
It is cracked, illustrate that final drive shaft does not start to fail, should also stop testing, judge that final drive shaft reaches design objective；Wherein,
10000 ＜ M≤50000.
9. endless-track vehicle as claimed in claim 8 plays comprehensive actuator main shaft repeated impact test method in step gear shifting, its
It is characterized in that, in the step S11, if it is determined that final drive shaft has occurred and that failure, then stress and structure is carried out to final drive shaft
Analysis.
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| CN107917791B (en) | 2019-09-10 |
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