CN107340087A - A kind of analogue measurement device of high stress contact lubricating oil oil film frictional force - Google Patents
A kind of analogue measurement device of high stress contact lubricating oil oil film frictional force Download PDFInfo
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- CN107340087A CN107340087A CN201710390594.5A CN201710390594A CN107340087A CN 107340087 A CN107340087 A CN 107340087A CN 201710390594 A CN201710390594 A CN 201710390594A CN 107340087 A CN107340087 A CN 107340087A
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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
- G01L5/0009—Force sensors associated with a bearing
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The invention belongs to high auxiliary point contact bullet stream friction measurement field,It is related to a kind of analogue measurement device of high stress contact lubricating oil oil film frictional force,Its agent structure includes support platform,Disk drive device,Steel ball fixing device,Sensor is fixed and adjusting means,Load slewing equipment peace moving device,Disk drive device is fixed and is placed in support platform upper surface close to preceding edge,Contact of the roller with raceway is simulated in the contact of steel ball and plane round steel disk,Sensor is fixed and adjusting means is located at translation stage or so edge front,To measure the frictional force between steel ball and disk,Loading slewing equipment fixes the back edge middle for being placed in translation stage,By adjusting the spring adjusting nut in loading slewing equipment come the size of controlled loading plate institute loading force,Its agent structure is simple,Design concept is ingenious,Measurement result is accurate,It is simple to operate,Scientific in principle,Easy to use and flexible,It is practical,Application environment is good,Wide market.
Description
Technical field:
The invention belongs to high auxiliary point contact bullet stream friction measurement field, is related to a kind of friction measurement experimental simulation dress
Put, particularly a kind of analogue measurement device of high stress contact lubricating oil oil film frictional force can be to ball bearing in different motion
Frictional force under status condition carries out analogue measurement.
Background technology：
A large amount of parts in engineering contact for higher pair, and depending on operating condition, its lubricating status moistens greatly all in bullet stream
Under sliding, mixed lubrication and boundary lubrication, it is that tribological field is ground to be explored for the lubrication mechanism under mixed lubrication and boundary condition
The emphasis studied carefully, particularly process technology to contact secondary surface quality lifting and novel lubricating material use so that it is right
Need to be re-recognized in lubrication mechanism, and this is needed by this evaluation measures of lubricating oil frictional force in Contact Pair, Gao Ying
Power contact lubricating oil oil film friction measurement is mainly carried out by gravitation testing machine, in the prior art, Application No.
CN2736771Y Chinese patent discloses a kind of lubricating oil combination property evaluation testing machine, and it includes power set, friction pair,
Oil-receptacle, loading device, fixing axle, the friction pair include rotor and stator, and the patent is born a heavy burden using counterweight, utilizes lever
Sliding friction occurs for principle, the stator and rotor for making friction point, changes and rubs by the final oil temperature of temperature control device test record
Secondary polishing scratch is wiped to evaluate the abrasion resistance of lubricating oil, utility model design is simple and convenient to operate and is easy to carry about with one, still,
The patent still has following defect, first, it is not high to evaluate the anti-wear and wear-resistant performance accuracy of lubricating oil by polishing scratch, does not have
One accurate standard judges the size of polishing scratch, and polishing scratch is also that milli is irregular, and different people sentence to polishing scratch in itself
It is disconnected also to differ, personal error can be caused, second, just needing to change and repair friction pair after every test once, add manpower
Physical resources and financial resources, third, temperature is easily affected by the external environment so that the degree of accuracy of measurement result is not high, fourth, the utility model can not
The very first time draws test result, it is necessary to calculate.Therefore, to overcome the technological deficiency in conventional measurement apparatus, exploitation one kind is cut
Real feasible experimental provision contacts lubricating oil film frictional force to high stress and carries out accurate measurement, and data branch is provided to study it
Hold, lubricating oil film frictional force research process are being contacted to high stress, for simplifying the analysis by contact of the roller with raceway
Contact of the roller with plane is equivalent to, design prepares a kind of analogue measurement device of high stress contact lubricating oil oil film frictional force.
The content of the invention：
The object of the present invention is to overcome the problems of the prior art, seeks design and provides a kind of high stress contact lubrication
The analogue measurement device of oily oil drag power, connecing for roller and raceway is simulated using the contact of steel ball and plane round steel disk
Touch, to obtain the frictional force data that accuracy is high, reproducible, provided in fact with contacting the research of lubricating oil film frictional force to high stress
Test data support.
To achieve these goals, the analogue measurement device of high stress contact lubricating oil oil film frictional force of the present invention
Agent structure include：Support platform, disk drive device, steel ball fixing device, sensor is fixed and adjusting means, is loaded back into
Rotary device and translating device；Support platform is that bottom is four foot-supporting structures, the upper ends of four support feets respectively with table top four
It is fixedly connected at angle；The disk drive device is fixed and is placed in support platform upper surface close to preceding edge, its agent structure bag
Include：Round steel disk, fixing device, driven pulley, driven shaft, disk drive motor support base, disk drives motor, synchronous pulley, fixed disk and set
Cylinder；Round steel disk fixes the upper end for being placed in driven shaft, and the upper end of the round steel disk is equipped with the fixed dress of circle to fixed round steel disk
Put, the lower end of the driven shaft is through the fixed via on translating device, and driven shaft lower end is fixedly equipped with driven pulley, uses
To transmit the power of synchronous pulley to drive driven shaft to rotate, the upside that driven pulley is pressed close in the lower end of driven shaft movable is cased with
Cylindricality cannulated sleeve, sleeve upper end are fixedly connected with fixed disk, and the driven shaft can freely rotate around the chamber among sleeve,
The circumference edge correspondence position of the fixed disk and fixed via is provided with bolt hole, fixed disk is fixed on table top
And to fixed disc drive device；The right edge that the disk drive motor support base of work shape structure is fixed on table top is located rearward, the disk
Drive the notch of motor support base inwardly, and the disk for being fixedly equipped with to provide power in notch drives motor, and the disk drives motor
The lower side panel that output shaft drives motor support base through disk is connected with synchronous pulley, to drive synchronous pulley to rotate.
The steel ball fixing device is located at the upside of round steel disk, and its agent structure includes：Steel ball bearing, steel ball sleeve, open
Stringing nut and steel ball；Steel ball bearing is round bar shape structure, and its upper end is connected with the outer end of the load plate in loading slewing equipment,
The power for loading slewing equipment loading is transferred into steel ball bearing, the lower end of steel ball bearing is threadedly coupled cylindric steel ball set
Cylinder, the top place of lateral surface of steel ball sleeve are equipped with two tensioning line nuts, two tensioning line nuts on the steel ball sleeve it
Between angle be 180 °；Fixed by being tensioned line and sensor and adjusting means in pressure sensor be connected；The steel ball set
Cylinder lower end be cased with steel ball, the lower end of steel ball contacts with round steel disk is used as high stress Contact Pair, and by pressure sensor come
Observe Contact Pair change in friction force process.
The sensor is fixed and adjusting means is located at translation stage or so edge front, and its agent structure includes：It is one-dimensional
Translation stage, branch seat leg, supporting screw, sensor connecting plate and pull pressure sensor；The one-dimensional translation stage and translation stage activity
Formula connects, and is merely able to move left and right along translation stage, and the upper surface of the one-dimensional translation stage is fixedly equipped with the bearing of L-type structure
Pin, the upside middle of branch seat leg and the lower end of supporting screw connect, and the sensor connecting plate is that L-type bends harden structure, under
It is the hyphen harden structure bent laterally to hold as two vertical plates structure, upper end, is close to closely prop up on the outside of the two vertical plates structure
The inner side of seat leg, the inner side middle of the two vertical plates structure are fixedly equipped with pull pressure sensor, the pull pressure sensor
It is connected by being tensioned line with tensioning line nut, the upside of the supporting screw is connected with the hyphen harden structure of sensor connecting plate,
The height of sensor connecting plate is adjusted by adjusting supporting screw, further adjusts the height of pressure sensor.
The loading slewing equipment fixes the back edge middle for being placed in translation stage, and its agent structure includes：Load plate, bullet
Spring adjusting nut, spring, spring base, support side plate, thrust axis, bearing block and thrust ball bearing；The bearing of hollow cylinder structure
Seat fixation is placed on translation stage, and thrust ball bearing, the lower end axle of the thrust ball bearing and thrust axis are equipped with in-between cavity
Connection is held, thrust axis can freely rotate in the horizontal direction around thrust ball bearing, and the upside of the thrust axis is cuboid tabular
Structure, and the spring base of the middle of thrust axis and plate-like structure connects, the upper end of the thrust axis and support side plate
One end rotary type connection, support side plate can rotate upwardly and downwardly around thrust axis；The other end of the support side plate and the one of load plate
End connection, the other end of the load plate is connected with steel ball bearing, to be loaded to steel ball fixing device；The spring base
Upside be fixedly equipped with spring adjusting nut, the upper end of spring adjusting nut is equipped with spring, and the upper end of spring and load plate are close
The bottom connection of one end of support side plate, to by adjusting spring adjusting nut come the size of controlled loading plate institute loading force.
The translating device includes：Table top, sliding block, guide rail, translation plates, screw thread front stall, screw thread back seat, translation screw rod and solid
Determine through hole；The close preceding edge of table top is provided with fixed via, and translation plates, the lower surface of the translation plates are equipped with the upside of table top
On be equipped with screw thread front stall, screw thread back seat is equipped with the upper surface of the table top, screw thread front stall and screw thread back seat are by translating screw rod
Connection, translation screw rod rotation can realize moving horizontally for translation plates, and the upper surface of table top, which is equipped with along table top fore-and-aft direction, to be extended
Line slideway and slide block structure, the lower surfaces of the translation plates is provided with the groove with guide rail and sliding block cooperation, and sliding block can be
Slip in groove, to reduce the frictional resistance in translation plates moving process, and moved forward and backward by translation plates to drive
Steel ball fixing device, sensor fix and adjusting means and loading slewing equipment move forward and backward, to adjust the revolution of round steel disk
Radius.
For the present invention when measuring high stress contact lubricating oil oil film frictional force, specific measuring process is as follows：
1st, the adjustment of the radius of gyration and loading force：
First adjustment translates screw rod to adjust the front and back position of translation plates, and returning for steel ball is adjusted by the movement of table position
Turn radius, spring adjusting nut is adjusted according to the size of required loading force, then the counterweight of corresponding weight is placed in load plate
Accurately loaded；
2nd, the adjustment of pull pressure sensor position：
Supporting screw is first adjusted to adjust the height of sensor connecting plate, pull pressure sensor is reached required height
Degree, fixes supporting screw after adjustment, then moves one-dimensional translation stage to adjust the size of required tensile force, and adjustment finishes
One-dimensional translation stage is fixed afterwards；
3rd, the acquisition of frictional force：
Boot disk drives motor, and disk drives motor and drives driven pulley to rotate by synchronous pulley, and power is transferred into driven shaft
On come drive round steel disk rotate, round steel disk and steel ball collectively constitute high stress Contact Pair, side of two pull pressure sensor to drawing
Formula is connected with load plate by being tensioned line, and two pull pressure sensor are connected on translation stage, is tensed by mobile translation stage
Line is tensioned, load plate can freely return under conditions of two pull pressure sensor tight constraints are not affected by around loading slewing equipment
Turn；And when load plate by two pull pressure sensor to draw constrain after, load plate contact friction force effect under, it will production
Raw revolution trend, the trend are delivered in pull pressure sensor, and then obtain frictional force；
4th, the on-line measurement and storage of frictional force：
Round steel disk and steel ball frictional force are measured by pull pressure sensor, is captured and is transferred to by data collecting card USB
PC ends, data signal is converted analog signals into by PC ends, by calling dynamic link library, the LabVIEW of data acquisition entered
Line program designs, and realizes LabVIEW and general data capture card USB combination, and then realizes the collection of signal, processing sum
According to storage, frictional force is directly read by acquisition interface, completes the on-line measurement and storage of frictional force；
5th, the demarcation of measuring apparatus：
Drawing can be realized using two pull pressure sensor the systematic error in measurement process is demarcated, due to adding
The revolution of support plate needs to realize by thrust ball bearing support, if making steel ball produce motion or movement tendency, it is necessary to overcome and push away
The force of rolling friction of power bearing in itself, in order to ensure the accuracy of friction measurement, it is necessary to calibrate rubbing in thrust ball bearing
Torque is wiped, is tested using the sensor of the designs such as Chen Jun to drawing, the numerical value measured by pull pressure sensor is modified, it is assumed that
The moment of friction for hindering steel ball motion is M, and two pull pressure sensor are respectively designated as into sensor 1 and sensor 2 to carry out
Distinguish, when sensor 1 is fixed, during 2 uniform motion of sensor, sensor 1 obtains value of thrust F1, sensor 2 obtains F2, have：
F2X2=F1X1+M (1)
Make in above formulaThen have
F2=b+F1k (2)
Wherein, X1、X2Represent sensor 1 and sensor 2 to the distance of the centre of gyration, it is necessary to illustrate, although right respectively
Draw experiment ball-disk and not in contact with, but test in F2Lubricating oil film is to steel after ball in friction Force system-disk contact can be equivalent to
The actual frictional force that ball applies, therefore, in order to eliminate the influence of moment of friction in thrust ball bearing, only it need to read sensor
F1Numerical value, lubricating oil film is applied to the actual frictional force F of steel ball2Then it is calculated by fitting formula.
The present invention compared with prior art, as high stress Contact Pair led to by the structure coordinated using steel ball and round steel disk
Pull pressure sensor is crossed constantly to obtain Contact Pair change in friction force process, improves the accuracy and repeatability of measurement data,
Translation plates can be moved forward and backward along table top to adjust the radius of gyration, and practicality is good, and loading slewing equipment can be accurate as needed
The size of controlled loading power, to ensure the accuracy of measurement result, while the operating flexibility of equipment is improved, its agent structure
Simply, design concept is ingenious, and measurement result is accurate, simple to operate, scientific in principle, and easy to use and flexible is practical, should
Good, the wide market with environment.
Brief description of the drawings：
Fig. 1 is the agent structure principle schematic of the present invention.
Fig. 2 is the agent structure principle schematic of disk drive device of the present invention.
Fig. 3 is the agent structure principle schematic of steel ball fixing device of the present invention.
Fig. 4 is fixed for sensor of the present invention and the agent structure principle schematic of adjusting means.
Fig. 5 is the agent structure principle schematic of loading slewing equipment of the present invention.
Fig. 6 is the vertical section structure principle schematic of bearing block of the present invention.
Fig. 7 is the agent structure principle schematic of translating device of the present invention.
Embodiment：
The invention will be further described by way of example and in conjunction with the accompanying drawings.
Embodiment：
The agent structure of the analogue measurement device for the high stress contact lubricating oil oil film frictional force that the present embodiment is related to includes：
Support platform 1, disk drive device 2, steel ball fixing device 3, sensor are fixed and adjusting means 4, the peace of loading slewing equipment 5
Moving device 6；Support platform 1 is that bottom is four foot-supporting structures, and the upper end of four support feets at the corner of table top 61 respectively with consolidating
Fixed connection；The fixation of disk drive device 2 is placed in the upper surface of support platform 1 to be included close to preceding edge, its agent structure：Circle
Steel disk 21, fixing device 22, driven pulley 23, driven shaft 24, disk drive motor support base 25, disk drive motor 26, synchronous pulley 27, consolidated
Price fixing 28 and sleeve 29；Round steel disk 21 fixes the upper end for being placed in driven shaft 24, and the upper end of the round steel disk 21 is equipped with to solid
Determine the circular fixing device 22 of round steel disk 21, the lower end of the driven shaft 24 passes through the fixed via 68 on translating device 6, and
And the lower end of driven shaft 24 is fixedly equipped with driven pulley 23, to transmit the power of synchronous pulley 27 to drive driven shaft 24 to rotate,
The lower end of driven shaft 24 press close to driven pulley 23 upside it is movable be cased with cylindricality cannulated sleeve 29, the upper end of sleeve 29, which is fixed, to be connected
Fixed disk 28 is connected to, the driven shaft 24 can freely rotate around the chamber among sleeve 29, and the fixed disk 28 leads to fixed
The circumference edge correspondence position in hole 68 is provided with bolt hole, fixed disk 28 is fixed on table top 61 and justified to fixed
Disk drive device 2；The right edge that the disk drive motor support base 25 of work shape structure is fixed on table top 61 is located rearward, and the disk drives motor branch
Inwardly, and the disk for being fixedly equipped with to provide power in notch drives motor 26 to the notch of seat 25, and the disk drives the defeated of motor 26
The lower side panel that shaft drives motor support base 25 through disk is connected with synchronous pulley 27, to drive synchronous pulley 27 to rotate.
The steel ball fixing device 3 is located at the upside of round steel disk 21, and its agent structure includes：Steel ball bearing 31, steel ball set
Cylinder 32, tensioning line nut 33 and steel ball 34；Steel ball bearing 31 is round bar shape structure, its upper end and adding in loading slewing equipment 5
The outer end connection of support plate 51, the power loading slewing equipment 5 to be loaded are transferred to steel ball bearing 31, the lower end of steel ball bearing 31
Cylindric steel ball sleeve 32 is threadedly coupled, the top place of lateral surface of steel ball sleeve 32 is equipped with two tensioning line nuts 33, the steel
The angle between two tensioning line nuts 33 on ball cover cylinder 32 is 180 °；Fixed by being tensioned line and sensor and adjusting means
Pressure sensor 45 in 4 connects；The lower end of the steel ball sleeve 32 is cased with steel ball 34, and lower end and the round steel disk 21 of steel ball 34 connect
Touch and be used as high stress Contact Pair, and Contact Pair change in friction force process is observed by pressure sensor 45.
The sensor is fixed and adjusting means 4 is located at the edge front of translation stage 64 or so, and its agent structure includes：One
Tie up translation stage 41, branch seat leg 42, supporting screw 43, sensor connecting plate 44 and pull pressure sensor 45；The one-dimensional translation stage
41 with 64 movable connection of translation stage, and be merely able to move left and right along translation stage 64, the upper surface of the one-dimensional translation stage 41
The branch seat leg 42 of L-type structure is fixedly equipped with, the upside middle of branch seat leg 42 is connected with the lower end of supporting screw 43, the sensing
Device connecting plate 44 is that L-type bends harden structure, and lower end be two vertical plates structure, and upper end is the hyphen harden structure bent laterally, institute
The inner side for being close to nearly branch seat leg 42 on the outside of two vertical plates structure is stated, the inner side middle of the two vertical plates structure is fixedly equipped with
Pull pressure sensor 45, the pull pressure sensor 45 are connected by being tensioned line with tensioning line nut 33, the supporting screw 43
Upside be connected with the hyphen harden structure of sensor connecting plate 44, adjust sensor connecting plate 44 by adjusting supporting screw 43
Height, further adjust pressure sensor 45 height.
The loading slewing equipment 5 fixes the back edge middle for being placed in translation stage 64, and its agent structure includes：Load plate
51st, spring adjusting nut 52, spring 53, spring base 54, support side plate 55, thrust axis 56,57, bearing block 58 and thrust ball bearing
59；The bearing block 58 of hollow cylinder structure is fixed and is placed on translation stage 64, and thrust ball bearing 59 is equipped with in-between cavity, described
Thrust ball bearing 59 is connected with the bottom end bearing of thrust axis 56, thrust axis 56 can around thrust ball bearing 59 in the horizontal direction from
By rotating, the upside of the thrust axis 56 is cuboid platy structure, and the middle of thrust axis 56 and plate-like structure
Spring base 54 is connected, and the upper end of the thrust axis 56 is connected with one end rotary type of support side plate 55, and support side plate 55 can be around
Thrust axis 56 rotates upwardly and downwardly；The other end of the support side plate 55 is connected with one end of load plate 51, the load plate 51 it is another
One end is connected with steel ball bearing 31, to be loaded to steel ball fixing device 3；The upside of the spring base 54 is fixedly equipped with bullet
Spring adjusting nut 52, the upper end of spring adjusting nut 52 are equipped with spring 53, and the upper end of spring and load plate 51 are close to support side plate
The bottom connection of 55 one end, to by adjusting spring adjusting nut 52 come the size of 51 loading forces of controlled loading plate.
The translating device 6 includes：Table top 61, sliding block 62, guide rail 63, translation plates 64, screw thread front stall 65, screw thread back seat
66th, screw rod 67 and fixed via 68 are translated；The close preceding edge of table top 61 is provided with fixed via 68, and the upside of table top 61 is equipped with
Translation plates 64, screw thread front stall 65 are equipped with the lower surface of the translation plates 64, after being equipped with screw thread on the upper surface of the table top 61
Seat 66, screw thread front stall 65 and screw thread back seat 66 are connected by translating screw rod 67, and the translation rotation of screw rod 67 can realize translation plates 64
Move horizontally, the upper surface of table top 61 is equipped with line slideway 63 and the structure of sliding block 62 along the extension of the fore-and-aft direction of table top 61, institute
The lower surface for stating translation plates 64 is provided with the groove coordinated with guide rail 63 and sliding block 62, the slip that sliding block 62 can be in the trench, uses
To reduce the frictional resistance in the moving process of translation plates 64, and moved forward and backward by translation plates 64 to drive steel ball fixing device
3rd, sensor fix and adjusting means 4 and loading slewing equipment 5 it is movable, to adjust the radius of gyration of round steel disk 21.
For the present embodiment when measuring high stress contact lubricating oil oil film frictional force, specific measuring process is as follows：
(1) adjustment of the radius of gyration and loading force：
First adjustment translates screw rod 67 to adjust the front and back position of translation plates 64, is adjusted by the movement of the position of table top 61
The radius of gyration of steel ball 34, spring adjusting nut 52, then the counterweight by corresponding weight are adjusted according to the size of required loading force
It is placed in load plate 51 and is accurately loaded；
(2) adjustment of pull pressure sensor position：
Supporting screw 43 is first adjusted to adjust the height of sensor connecting plate 44, pull pressure sensor 45 is reached required
Height, supporting screw 43 is fixed after adjustment, then move one-dimensional translation stage 41 come the size of tensile force required for adjusting,
One-dimensional translation stage 41 is fixed after adjustment；
(3) acquisition of frictional force：
Boot disk drives motor 26, and disk drives motor 26 and drives driven pulley 23 to rotate by synchronous pulley 27, power is transmitted
Round steel disk 21 is driven to rotate on to driven shaft 24, round steel disk 21 and steel ball 34 collectively constitute high stress Contact Pair, two tension and compression
Force snesor 45 is connected to the mode of drawing with load plate 51 by being tensioned line, and two pull pressure sensor 45 are connected to translation stage 64
On, tensioning line is tensed by mobile translation stage 64, load plate 51 is being not affected by the bar of two tight constraints of pull pressure sensor 45
Under part, can freely it be turned round around loading slewing equipment 5；And after load plate 51 is constrained drawing by two pull pressure sensor 45,
Load plate 51 under contact friction force effect, it will produce revolution trend, the trend is delivered to pull pressure sensor 45
On, and then obtain frictional force；
(4) on-line measurement and storage of frictional force：
Round steel disk 21 and the frictional force of steel ball 34 are measured by pull pressure sensor 45, caught by data collecting card USB5935
Obtain and be transferred to PC ends, data signal is converted analog signals into by PC ends, by calling dynamic link library, to data acquisition
LabVIEW carries out programming, realizes LabVIEW and general data capture card USB5935 combination, and then realize adopting for signal
Collection, processing and data storage, directly read frictional force by acquisition interface, complete the on-line measurement and storage of frictional force；
(5) demarcation of measuring apparatus：
Drawing can be realized using two pull pressure sensor 45 systematic error in measurement process is demarcated, due to
The revolution of load plate 51 needs to support by thrust ball bearing 59 to realize, if making, steel ball (roller) produces motion or motion becomes
Gesture, it is necessary to the force of rolling friction of of thrust ball bearing 59 itself is overcome, in order to ensure the accuracy of friction measurement, it is necessary to demarcate
The moment of friction gone out in thrust ball bearing 59, tested to drawing using the sensor of the designs such as Chen Jun, surveyed by pull pressure sensor 45
The numerical value measured is modified, it is assumed that the moment of friction for hindering steel ball 34 to move is M, and two pull pressure sensor 45 are ordered respectively
Entitled sensor 1 and sensor 2 are made a distinction, and when sensor 1 is fixed, during 2 uniform motion of sensor, sensor 1 is drawn
Force value F1, sensor 2 obtains F2, have：
F2X2=F1X1+M (1)
Make in above formulaThen have
F2=b+F1k (2)
Wherein, X1、X2Represent sensor 1 and sensor 2 to the distance of the centre of gyration, it is necessary to illustrate, although right respectively
Draw experiment ball-disk and not in contact with, but test in F2Lubricating oil film is to steel after ball in friction Force system-disk contact can be equivalent to
The actual frictional force that ball applies, therefore, in order to eliminate the influence of moment of friction in bearing, the present embodiment need to only read sensor
F1Numerical value, lubricating oil film is applied to the actual frictional force F of steel ball2Then it is calculated by fitting formula.
Claims (4)
1. a kind of analogue measurement device of high stress contact lubricating oil oil film frictional force, it is characterised in that its agent structure includes：
Support platform, disk drive device, steel ball fixing device, sensor is fixed and adjusting means, loading slewing equipment peace move dress
Put；Support platform is that bottom is four foot-supporting structures, and the upper end of four support feets is fixedly connected with the corner of table top respectively；Institute
State disk drive device and fix and be placed in support platform upper surface and include close to preceding edge, its agent structure：Round steel disk, fixed dress
Put, driven pulley, driven shaft, disk drive motor support base, disk drives motor, synchronous pulley, fixed disk and sleeve；Round steel disk is fixed and is placed in
The upper end of driven shaft, the upper end of the round steel disk are equipped with to the circular fixing device of fixed round steel disk, under the driven shaft
End is through the fixed via on translating device, and driven shaft lower end is fixedly equipped with driven pulley, to transmit synchronous pulley
For power to drive driven shaft to rotate, the upside that driven pulley is pressed close in the lower end of driven shaft movable is cased with cylindricality cannulated sleeve, set
Cylinder upper end be fixedly connected with fixed disk, the driven shaft can freely rotate around the chamber among sleeve, the fixed disk with consolidate
The circumference edge correspondence position for determining through hole is provided with bolt hole, fixed disk is fixed on table top and to fixed disc
Drive device；The right edge that the disk drive motor support base of work shape structure is fixed on table top is located rearward, and the disk drives the groove of motor support base
Mouthful inwardly, and in notch the disk for being fixedly equipped with to provide power drives motor, and the disk drives the output shaft of motor through disk drive
The lower side panel of motor support base is connected with synchronous pulley, to drive synchronous pulley to rotate；The steel ball fixing device is located at round steel
The upside of disk, its agent structure include：Steel ball bearing, steel ball sleeve, tensioning line nut and steel ball；Steel ball bearing is round bar shape knot
Structure, its upper end are connected with the outer end of the load plate in loading slewing equipment, the power for loading slewing equipment loading to be transferred to
Steel ball bearing, the lower end of steel ball bearing are threadedly coupled cylindric steel ball sleeve, and the top place of lateral surface of steel ball sleeve is equipped with two
Line nut is tensioned, the angles between two tensioning line nuts on the steel ball sleeve are 180 °；By being tensioned line and sensor
Pressure sensor connection in fixed and adjusting means；The lower end of the steel ball sleeve is cased with steel ball, the lower end of steel ball and round steel
Disk contact is used as high stress Contact Pair, and observes Contact Pair change in friction force process by pressure sensor；The sensing
Device is fixed and adjusting means is located at translation stage or so edge front, and its agent structure includes：One-dimensional translation stage, branch seat leg, branch
Support screw, sensor connecting plate and pull pressure sensor；The upper surface of the one-dimensional translation stage is fixedly equipped with the bearing of L-type structure
Pin, the upside middle of branch seat leg and the lower end of supporting screw connect, and the sensor connecting plate is that L-type bends harden structure, under
It is the hyphen harden structure bent laterally to hold as two vertical plates structure, upper end, is close to closely prop up on the outside of the two vertical plates structure
The inner side of seat leg, the inner side middle of the two vertical plates structure are fixedly equipped with pull pressure sensor, the pull pressure sensor
It is connected by being tensioned line with tensioning line nut, the upside of the supporting screw is connected with the hyphen harden structure of sensor connecting plate,
The height of sensor connecting plate is adjusted by adjusting supporting screw, further adjusts the height of pressure sensor；The loading
Slewing equipment fixes the back edge middle for being placed in translation stage, and its agent structure includes：Load plate, spring adjusting nut, spring,
Spring base, support side plate, thrust axis, bearing block and thrust ball bearing；The bearing block of hollow cylinder structure is fixed and is placed in translation stage
On, thrust ball bearing is equipped with in-between cavity, the bottom end bearing connection of the thrust ball bearing and thrust axis, thrust axis can
Freely being rotated in the horizontal direction around thrust ball bearing, the upside of the thrust axis is cuboid platy structure, and thrust axis
The spring base of middle and plate-like structure connects, and the upper end of the thrust axis and one end rotary type of support side plate connect, branch
Support side plate can rotate upwardly and downwardly around thrust axis；The other end of the support side plate and one end of load plate connect, the load plate
The other end be connected with steel ball bearing, to be loaded to steel ball fixing device；Bullet is fixedly equipped with the upside of the spring base
Spring adjusting nut, the upper end of spring adjusting nut are equipped with spring, and the upper end of spring and load plate are close to one end of support side plate
Bottom connects, to by adjusting spring adjusting nut come the size of controlled loading plate institute loading force；The translating device includes：
Table top, sliding block, guide rail, translation plates, screw thread front stall, screw thread back seat, translation screw rod and fixed via；The close preceding edge of table top
Fixed via is provided with, translation plates are equipped with the upside of table top, screw thread front stall is equipped with the lower surface of the translation plates, the table top
Screw thread back seat is equipped with upper surface, screw thread front stall connects with screw thread back seat by translating screw rod, and translation screw rod rotation can be realized
Translation plates move horizontally, and the upper surface of table top is equipped with the line slideway and slide block structure that extend along table top fore-and-aft direction, described
The lower surface of translation plates is provided with the groove with guide rail and sliding block cooperation, and the slip that sliding block can be in the trench is flat to reduce
The frictional resistance moved in plate moving process, and moved forward and backward by translation plates drive steel ball fixing device, sensor fix and
Adjusting means and loading slewing equipment move forward and backward, to adjust the radius of gyration of round steel disk.
2. the analogue measurement device of high stress contact lubricating oil oil film frictional force according to claim 1, it is characterised in that
One-dimensional translation stage and the movable connection of translation stage, and be merely able to move left and right along translation stage.
3. the analogue measurement device of high stress contact lubricating oil oil film frictional force according to claim 1, it is characterised in that
The angle between two tensioning line nuts on steel ball sleeve is 180 °.
4. the analogue measurement device of high stress contact lubricating oil oil film frictional force according to claim 1, it is characterised in that
Specific measuring method is carried out in accordance with the following steps：
(1) adjustment of the radius of gyration and loading force：
First adjustment translates screw rod to adjust the front and back position of translation plates, and the revolution of steel ball half is adjusted by the movement of table position
Footpath, spring adjusting nut is adjusted according to the size of required loading force, then the counterweight of corresponding weight is placed in load plate and carried out
Accurate loading；
(2) adjustment of pull pressure sensor position：
Supporting screw is first adjusted to adjust the height of sensor connecting plate, pull pressure sensor is reached required height, is adjusted
Supporting screw is fixed after whole, then moves one-dimensional translation stage to adjust the size of required tensile force, it is solid after adjustment
Fixed one-dimensional translation stage；
(3) acquisition of frictional force：
Boot disk drives motor, and disk drives motor and drives driven pulley to rotate by synchronous pulley, power is transferred on driven shaft
Drive round steel disk to rotate, round steel disk and steel ball collectively constitute high stress Contact Pair, two pull pressure sensor to the mode of drawing with
Load plate is connected by being tensioned line, and two pull pressure sensor are connected on translation stage, and tensioning is tensed by mobile translation stage
Line, load plate can freely turn round under conditions of two pull pressure sensor tight constraints are not affected by around loading slewing equipment；And
When load plate by two pull pressure sensor to draw constrain after, load plate contact friction force effect under, it will produce back
Gesture is transferred toward, the trend is delivered in pull pressure sensor, and then obtains frictional force；
(4) on-line measurement and storage of frictional force：
Round steel disk and steel ball frictional force are measured by pull pressure sensor, is captured by data collecting card USB and is transferred to PC ends,
Data signal is converted analog signals into by PC ends, by calling dynamic link library, line program is entered to the LabVIEW of data acquisition
Design, realizes LabVIEW and general data capture card USB combination, and then realizes the collection, processing and data storage of signal,
Frictional force is directly read by acquisition interface, completes the on-line measurement and storage of frictional force；
(5) demarcation of measuring apparatus：
Drawing can be realized using two pull pressure sensor the systematic error in measurement process is demarcated, due to load plate
Revolution need to realize by thrust ball bearing support, if make steel ball produce motion or movement tendency, it is necessary to overcome thrust axis
The force of rolling friction of itself is held, in order to ensure the accuracy of friction measurement, it is necessary to calibrate the frictional force in thrust ball bearing
Square, tested using the sensor of the designs such as Chen Jun to drawing, the numerical value measured by pull pressure sensor is modified, it is assumed that hinder
The moment of friction of steel ball motion is M, and two pull pressure sensor are respectively designated as into sensor 1 and sensor 2 to make a distinction,
When sensor 1 is fixed, during 2 uniform motion of sensor, sensor 1 obtains value of thrust F1, sensor 2 obtains F2, have：
F2X2=F1X1+M (1)
Make in above formulaThen have
F2=b+F1k (2)
Wherein, X1、X2Sensor 1 and sensor 2 are represented respectively to the distance of the centre of gyration, it is necessary to illustrate, although real to drawing
Test ball-disk and not in contact with, but test in F2Lubricating oil film is applied to steel ball after ball in friction Force system-disk contact can be equivalent to
The actual frictional force added, therefore, in order to eliminate the influence of moment of friction in thrust ball bearing, only it need to read sensor F1Number
Value, lubricating oil film are applied to the actual frictional force F of steel ball2Then it is calculated by fitting formula.
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