CN207379856U - A kind of friction wear testing machine - Google Patents

A kind of friction wear testing machine Download PDF

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Publication number
CN207379856U
CN207379856U CN201720370423.1U CN201720370423U CN207379856U CN 207379856 U CN207379856 U CN 207379856U CN 201720370423 U CN201720370423 U CN 201720370423U CN 207379856 U CN207379856 U CN 207379856U
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China
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support
fixture
test specimen
axis pin
support plate
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CN201720370423.1U
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Chinese (zh)
Inventor
孙中超
喻天翔
崔卫民
宋笔锋
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Northwestern Polytechnical University
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Northwestern Polytechnical University
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Abstract

A kind of friction wear testing machine, the operating bar of pressurized strut pass through pressurized strut mounting hole.Two support distributions are in the both sides of pressurized strut mounting hole.Two taper sheaths are mounted on the inside support plate of each support.The both ends of test specimen axis pin are respectively charged into two taper sheaths.Test specimen axis pin is mounted on the center of fixture, and fixture outer ring is mounted on the upper end of pull pressure sensor, and pull pressure sensor is mounted on the operating bar top of pressurized strut.Two displacement sensors are located at the both sides of fixture respectively.One end of torque sensor is connected respectively with test specimen axis pin between the outside support plate of each support and inside support plate, and the other end of each torque sensing is affixed with speed reducer respectively.Two servomotors are located on the outside of each support respectively.The utility model can realize the rotation of axis pin and axle sleeve respectively, and can realize the loading of radial load and monitoring in real time and the real-time monitoring of wear extent and moment of friction, have installation and removal conveniently, wear extent and measurement of friction torque feature with high accuracy.

Description

A kind of friction wear testing machine
Technical field
It, can more particularly to a kind of for oscillating bearing and hinge the present invention relates to friction wear testing machine field Realize the friction wear testing machine that axis pin and axle sleeve rotate simultaneously.
Background technology
The important component of oscillating bearing and hinge as motion, in industrial robot, aerospace, automobile, engineering The fields such as machinery are widely used.Oscillating bearing is generally made of bearing inner race and outer ring, therebetween can phase in two directions To rotating.Hinge is generally made of axis pin and axle sleeve, can be circumferentially rotated therebetween.It can be seen that in structure and forms of motion On, oscillating bearing and hinge have certain similitude.Convenient for statement, the present invention will be in the axis pin and oscillating bearing of hinge Circle is referred to as " axis pin ", and the outer ring of the axle sleeve of hinge and oscillating bearing is referred to as " axle sleeve ".
The main damage form of oscillating bearing and hinge is that the gap as caused by abrasion and moment of friction become larger.Above two Damage type can cause motion to occur that running noises and vibration become larger, kinematic accuracy and efficiency decline or even the mistakes such as clamping stagnation Effect pattern.Therefore, for study movement mechanism durability and reliability, it is necessary to friction, abrasiveness to oscillating bearing and hinge Energy Evolution is predicted.But since abrasional behavior has strong system dependence and time variation, in existing tribology Under research level, the friction-wear test data of numerical simulation and material standard sample cannot be still relied only on to predict oscillating bearing Friction, abrasion Evolution with hinge.To ensure mechanism kinematic functional reliability, it is necessary in dedicated friction wear testing machine On, consider real working condition, friction-wear test is carried out to oscillating bearing and hinge.
Jiang Qinyu is published in《Mechanical engineering journal》The paper of the 1st phase of volume 43 in 2007 " is asked based on technology of numerical simulation Solve linkage probability wear lifetime " thinking hinge, there are 3 kinds of forms of motion:(1) axis pin rotates, and axle sleeve is motionless;(2) axis pin Motionless, axle sleeve rotates;(3) axis pin and axle sleeve rotate simultaneously.Similarly, oscillating bearing also there are bearing outer ring and inner ring both circumferentially The forms of motion of rotation.Radial load is to influence one of oscillating bearing and hinge friction, the principal element for wearing Evolution, examination The machine of testing should be able to apply radial load to test specimen, and it is monitored in real time.In addition, to obtain the friction of test specimen, polishing machine Evolution curve is, it is necessary to which wear extent and moment of friction to test specimen are monitored in real time.In conclusion it based on test objective and needs It asks, testing machine should be able to meet following requirement:(1) certain radial load is loaded to test specimen;(2) axis pin and axle sleeve are realized while It circumferentially rotates;(3) the real-time monitoring of the parameters such as radial load, wear extent and moment of friction is realized.
For the kinematic pair of revolute pair and oscillating bearing class, mainly there is the friction wear testing machine of following two class at present, i.e.,: (1) it is published in Chi Chengfang《Engineering and experiment》The paper " development of bearing wear testing machine " of 3rd phase in 2008 is representative The friction wear testing machine of oscillating bearing is only capable of realizing the rotation of oscillating bearing axis pin;(2) with patent of invention " compound swinging type Joint bearing testing machine ", Patent No. 201010276423.8 and " compound swinging type joint bearing life testing machine ", the patent No. For the oscillating bearing friction wear testing machine that 201310191988.X is representative, the circumferential reciprocally swinging of axis pin can be realized simultaneously, And axle sleeve is in the reciprocally swinging of inclined direction, but the circuit oscillation of axle sleeve can not be realized simultaneously.For hinges, above-mentioned two Class testing machine is only capable of meeting axis pin rotation, the simulation of the motionless operating mode of axle sleeve.To oscillating bearing, existing testing machine also can not achieve axis It is circumferentially rotated while holding inner ring and outer ring.And for the operating mode that axis pin and axle sleeve both circumferentially rotate, kinematic pair wear law, And the contact surface contact form changing rule as caused by abrasion and first two operating mode are completely different.It is in conclusion existing Friction wear testing machine can not fully meet the friction of oscillating bearing and hinge, wear test demand.
The content of the invention
To overcome the friction in the prior art that cannot meet oscillating bearing and hinge, wear test demand not Foot, the present invention propose a kind of friction wear testing machine.
The present invention includes rack, two servomotors, two torque sensors, two self-aligning roller bearings, two decelerations Machine, the first support, the second support, fixture, test specimen axis pin, rocking arm, displacement sensor, pull pressure sensor and pressurized strut.It is described Rack includes pedestal and installing plate.
The geometric center of the installing plate has pressurized strut mounting hole.Pressurized strut is fixed on the upper surface of pedestal;Pressurized strut Operating bar passes through the pressurized strut mounting hole.First support and the second support are separately mounted to the upper surface of the installing plate, and edge Rack long side direction is distributed in the both sides of the pressurized strut mounting hole.It is supported on the inside support plate of the described first support with second Inside support plate on have through hole respectively, two taper sheaths are mounted on the described first support and second by self-aligning roller bearing respectively In through hole on the inside support plate of support.The taper surface at the both ends of test specimen axis pin is respectively charged into described two taper sheaths.It is described Test specimen axis pin is mounted on the center of fixture, and the fixture outer ring of fixture is mounted on the upper end of pull pressure sensor, pull pressure sensor Mounted on the operating bar top of pressurized strut.The pressurized strut is fixed on the upper surface of base plate.Two displacement sensor difference In two long sides of the installing plate, and positioned at the both sides of fixture.
There are one torque sensors for installation between the outside support plate of the described first support and inside support plate.The torque sensing One end of device is connected with the test specimen axis pin on the inside of the first support inside support plate;The other end of the torque sensor subtracts with one Fast machine is affixed.The speed reducer is connected with servomotor.
Also there are one torque sensors for installation between the outside support plate of the described second support and inside support plate.The torque passes One end of sensor and the rocking arm rocking bar lower end of rocking arm are connected;The other end of the torque sensor mounted on another speed reducer with consolidating It connects.The speed reducer is connected with servomotor.The upper end of the rocking arm rocking bar and one end of rocker-arm link are connected;The rocker-arm link The other end and fixture inner ring are affixed.
A servomotor is located on the outside of the outside support plate of the described first support in two servomotors, another Servomotor is located on the outside of the outside support plate of the described second support.
The fixture includes fixture outer ring, fixture inner ring, test specimen axle sleeve, expansion connecting sleeve and ball bearing, according to examination Part axle sleeve, expansion connecting sleeve, fixture inner ring, ball bearing and the order of fixture outer ring are set in together successively, and make the examination Part axle sleeve is located at innermost circle, and fixture outer ring is made to be located at outmost turns.When the test specimen axle sleeve, expansion connecting sleeve and fixture inner ring are set with After together, the tight fit of test specimen axle sleeve and fixture inner ring is realized by the expansion connecting sleeve.The fixture outer ring and ball axis It is interference fit between holding, between ball bearing and fixture inner ring.
The internal diameter of the fixture inner ring is identical with the outer diameter of expansion connecting sleeve, and makes tight fit therebetween;In the fixture There is the mounting hole of rocking arm on one end face of inner ring.The internal diameter of the expansion connecting sleeve is identical with the outer diameter of test specimen axle sleeve, and makes Therebetween tight fit.The internal diameter of the fixture outer ring is identical with the outer diameter of ball bearing.The outer circle weekly form of the fixture outer ring Face is processed as from all directions, a pair of of convex block being symmetrically distributed on the outer surface of the fixture outer ring, which is displacement sensor Measuring basis block, and the measuring basis block of the displacement sensor is corresponding with the position of described two displacement sensors respectively.
Described first support is "U" shaped, by first vertical plates on both sides supported respectively constituted outside support plate with it is interior Collateral plate, and make support plate on the inside of this adjacent with the fixture in assembling.There is speed reducer output shaft on the outside support plate Via;There is mounting hole on the periphery of the via.There is the mounting hole of self-aligning roller bearing on the inside support plate.Described Two supports are identical with the structure of first support.Due to being equipped with rocking arm in the second support one side, therefore second support Plate upper surface is machined with the concave surface of avoidance.
The inner surface of described taper sheath one end is the cone section extended out, the cone section and the conical surface on test specimen axis pin upper outer circumference surface Cooperation;The taper sheath other end is isometrical section.There is the positioning table of radially protruding in the middle part of the taper sheath external peripheral surface;The cone Shape set inner surface is that the external peripheral surface of cone section one end is also the conical surface, in order to install self-aligning roller bearing.
The middle part of the test specimen axis pin length direction is isometrical section, this isometrical section is trial zone;Outside described isometrical section Footpath is identical with the internal diameter of test specimen axle sleeve.The both ends of the test specimen axis pin are thread segment, for installing clamp nut.Described isometrical The inner conical surface of the cone section gradually shunk between section and thread segment for outer diameter to both ends, the cone section and taper sheath coordinates, for ensureing Test specimen axis pin and taper sheath are coaxial.
The rocking arm includes rocking arm rocking bar and rocker-arm link, and the end face of one end of rocker-arm link is shaken with the rocking arm The end face of bar upper end is connected, and the other end of rocker-arm link is fixed on an end face of fixture inner ring.To realize the rocker-arm link With being connected for the rocking arm rocking bar top end face, in the rocker-arm link, there is threaded connection hole in the end end face;The rocker-arm link it is another There is 90 ° of folded plate in one end, there is the threaded connection hole being connected with fixture inner ring on the folded plate.The upper end of the rocking arm rocking bar is rectangle Lath, the top of the lath is useful for connecting the through hole of the connecting rod;The lower end of the rocking arm rocking bar is semicircle block, is used for The eccentric rotary inertia of balancing rocker arm eliminates the rocking arm centrifugal force interference loaded to test specimen in rotation process.Described half Circular block is useful for being connected the connecting hole of torque sensor with the lath junction.
The cross section of the installing plate is concave, and the groove bottom of the groove is the second support and the first support Mounting surface has the pressurized strut installation through-hole for penetrating through the installing plate upper and lower surface in the geometric center of the mounting surface, in the pressurized strut The both sides of installation through-hole, the mounting hole for having displacement sensor respectively close to two long edge positions of the installing plate.
The installation through-hole of multiple second supports and the first support is provided on the mounting surface of the installing plate, to meet different rulers The test requirements document of very little test specimen.The center of each installation through-hole is symmetrical with the center line of the mounting surface width, with full The positioning of foot second support and the first support.
The friction wear testing machine that the present invention is proposed for widely applied oscillating bearing in motion and hinge can The rotation of axis pin and axle sleeve is realized respectively, and can realize the loading of radial load and monitoring in real time and wear extent and frictional force The real-time monitoring of square.In addition, testing machine should have, test specimen installation and removal are convenient, and wear extent and measurement of friction torque are with high accuracy Feature.
In the present invention, specimen holder module uses the structure type of ears piece support, by the first support, the second support, adjusts Heart roller bearing, taper sheath, fixture outer ring, ball bearing, fixture inner ring, expansion connecting sleeve, clamp nut are formed.Wherein, The inside of one support and the second support is respectively arranged with an inside support plate, for providing support for axis pin.To ensure axis pin peace A self-aligning roller bearing is respectively provided on the inside support plate supported to neutrality, the first support with second of dress.
It is the step of protrusion in the present invention, in the middle part of axis pin, is trial zone, axle sleeve is installed on herein.Step both sides are Taper surface, for coordinating with taper sheath;The outside of two taper surfaces is respectively screw thread, for installing clamp nut;On the outside of screw thread, It is the end to match with torque sensor towards one end of axis pin drive module.The standard sample shape of axle sleeve is patty, There is pin shaft hole at middle part, is trial zone.For ease of the installation and removal of axis pin, taper sheath is separately installed in self-aligning roller bearing, Taper is identical with the taper surface at axis pin both ends.After axis pin is installed on the bellmouth of the inside of taper sheath, make pin using clamp nut The taper surface at axis both ends is fitted close respectively with the taper surface inside two taper sheaths.
In the present invention, the rotation of axle sleeve is driven by servomotor.Axle sleeve drive module is by servomotor, speed reducer, shaft coupling Device, drive shaft, torque sensor, rocking arm are formed.Wherein, by being bolted together, composition is a set of for servomotor and speed reducer Driving unit.Speed reducer be mounted on second support outside, on the inside of output terminal be sequentially installed with shaft coupling, transmission shaft, torsion Square sensor and rocking arm, the inside of rocking arm and fixture inner ring are affixed.The moment of friction of calibration ball bearing, tests process before experiment In, the reading of torque sensor subtracts the moment of friction of ball bearing, is the moment of friction of test specimen.
The present invention is provided with the measuring basis block of displacement sensor in the both sides of fixture outer ring.Two are corresponded on a mounting board The position of measuring basis block is respectively and fixedly connected with there are one displacement sensor.During experiment, test specimen wear extent uses two pass bands Mode, i.e.,:Respectively by two displacement sensor test specimen wear extenies, the reality of test specimen is represented with the average of two measured values Border wear extent can eliminate measurement error caused by being rotated due to fixture outer ring is slight under the effect of servomotor torque.
Compared with prior art, the test specimen axis pin in the present invention is supported by two self-aligning roller bearings with first respectively With the second support connection, test specimen axle sleeve is connected by a ball bearing with fixture outer ring, test specimen axis pin and the equal energy of test specimen axle sleeve It is independently rotated under the driving of servomotor.Examination is transferred to by parts such as fixture outer ring, ball bearings using pressurized strut load On part axle sleeve, the loading of test specimen radial load is realized.Therefore, the present invention can simulate circumferentially rotating for axis pin and axle sleeve simultaneously, and Radial load can be loaded simultaneously, and the operating mode simulated is more true.It is monitored in a manner that binary channels is independently measured and is averaging Wear extent can eliminate the error brought due to fixture outer ring slightly deflects under Motor torque effect;The peace of test specimen axle sleeve Dress is using expansion connecting sleeve, and axis pin installation is using taper sheath, it can be achieved that the convenient installation and removal of test specimen;Axis pin uses ears piece The structure type of support in the case of identical test specimen pin diameter, has more compared with patent of invention 201010276423.8 High strength and stiffness;The support at axis pin both ends uses self-aligning roller bearing, test specimen installation accuracy is required low.
Description of the drawings
Fig. 1 is the structure diagram of the present invention;
Fig. 2 is the front view of Fig. 1;
Fig. 3 is the assembling schematic diagram of specimen holder module;
Fig. 4 is the sectional view of Fig. 3;
Fig. 5 is the perspective exploded view of fixture;
Fig. 6 is the connection diagram of axle sleeve fixture and rocking arm;
Fig. 7 is the connection diagram of fixture and torque sensor;
Fig. 8 is the connection diagram of fixture and torque sensor;
Fig. 9 is the top view of installing plate.In figure:
1. pedestal;2. column;3. installing plate;4. servomotor;5. speed reducer;6. the first support;7. shaft coupling;8. torque Sensor;9. fixture outer ring;10. ball bearing;11. fixture inner ring;12. expansion connecting sleeve;13. test specimen axle sleeve;14. test specimen Axis pin;15. clamp nut;16. taper sheath;17. self-aligning roller bearing;18. rocking arm;19. transmission shaft;20. the second support;21. Displacement sensor;22. pressurized strut;23. pull pressure sensor.
Specific embodiment
The present embodiment is the friction wear testing machine of a kind of oscillating bearing and hinge, including rack, two servomotors 4, Two the 6, second supports 20 of the self-aligning roller bearing 17, two of torque sensor 8, two speed reducer 5, first support, fixture, test specimens Axis pin 14, rocking arm 18, transmission shaft 19, displacement sensor 21, pull pressure sensor 23 and pressurized strut 22.
The geometric center of the installing plate 3 of the cuboid rack has pressurized strut mounting hole.Pressurized strut 22 is fixed on the rack Pedestal 1 upper surface;The operating bar of pressurized strut 22 passes through the pressurized strut mounting hole.First support 6 and the second 20 points of support An Zhuan not be as the upper surface of the installing plate 3 of rack upper surface, and be distributed in the pressurized strut along rack long side direction and install The both sides in hole.There are through hole, two cones on the inside support plate of the described first support 6 and on the inside support plate of the second support 20 respectively Shape set 16 is mounted on the through hole on the inside support plate of the described first support 6 and the second support 20 by self-aligning roller bearing 17 respectively In.The taper surface at the both ends of test specimen axis pin 14 is respectively charged into described two taper sheaths, and is passed through clamp nut 15 and fastened.It is described Test specimen axis pin 14 is mounted on the center of fixture, and the fixture outer ring 9 of fixture is by being threadably mounted at the upper of pull pressure sensor 23 End, pull pressure sensor 23 is by being threadably mounted at the operating bar top of pressurized strut 22, as shown in Figure 7.The pressurized strut 22 is solid It is scheduled on the upper surface of 1 bottom plate of pedestal.Two displacement sensors 21 are separately mounted in two long sides of the installing plate, and are located at The both sides of fixture.
There are one torque sensors 8 for installation between the outside support plate of the described first support 6 and inside support plate.The torque passes One end of sensor 8 is connected with the test specimen axis pin 14 on the inside of the first support inside support plate, as shown in Figure 4;The torque sensor 8 The other end by shaft coupling 7 and installation it is described first support 6 the speed reducer 5 of outside support plate outer surface one it is affixed.It is described to subtract Fast machine is connected with servomotor 4.
Also there are one torque sensors 8 for installation between the outside support plate of the described second support 20 and inside support plate.The torsion One end of square sensor 8 with positioned at second support inside support plate on the inside of rocking arm 18 in rocking arm rocking bar lower end semicircle block with The mode of shaft hole matching is connected;The other end of the torque sensor 8 is by shaft coupling 7 with being mounted on the outer of the described second support 20 Another speed reducer 5 of collateral plate outer surface is affixed.The speed reducer is connected with servomotor 4.The upper end of the rocking arm rocking bar with One end of rocker-arm link is connected;The rocker-arm link other end and fixture inner ring 11 are affixed by bolt.
A servomotor is located on the outside of the outside support plate of the described first support in two servomotors 4, another A servomotor is located on the outside of the outside support plate of the described second support.
As shown in Figure 5.The fixture includes fixture outer ring 9, fixture inner ring 11, test specimen axle sleeve 13, expansion connecting sleeve 12 With ball bearing 10, according to test specimen axle sleeve 13, expansion connecting sleeve 12, fixture inner ring 11, ball bearing 10 and fixture outer ring 9 Order is set in together from inside to outside successively, and the test specimen axle sleeve 13 is made to be located at innermost circle, is located at fixture outer ring 9 outermost Circle.After the test specimen axle sleeve, expansion connecting sleeve and fixture inner ring are set in together, test specimen axis is realized by the expansion connecting sleeve The tight fit of set and fixture inner ring.It was between the fixture outer ring and ball bearing, between ball bearing and fixture inner ring It is full of cooperation.
The fixture inner ring 11 is hollow revolving body.The internal diameter of the fixture inner ring is identical with the outer diameter of expansion connecting sleeve 12, And make tight fit therebetween;There is the mounting hole of rocking arm 18 on an end face of the fixture inner ring.The expansion connecting sleeve 12 Internal diameter it is identical with the outer diameter of test specimen axle sleeve 13, and make tight fit therebetween.
The internal diameter of the fixture outer ring 9 is identical with the outer diameter of ball bearing 10.The external peripheral surface of the fixture outer ring 9 adds For work from all directions, a pair of of convex block to be symmetrically distributed on the outer surface of the fixture outer ring 9, which is the measurement of displacement sensor Reference block, and the measuring basis block of the displacement sensor is corresponding with the position of described two displacement sensors 21 respectively.
Described first support 6 is "U" shaped, by first vertical plates on both sides supported respectively constituted outside support plate with it is interior Collateral plate, and make support plate on the inside of this adjacent with the fixture in assembling.There is 5 output shaft of speed reducer on the outside support plate Via;There is mounting hole on the periphery of the via.There is the mounting hole of self-aligning roller bearing on the inside support plate.
Second support 20 is identical with the structure of first support 6.Due in the second support one side installation There is rocking arm 18, therefore the second support baseboard upper surface is machined with the concave surface of avoidance.
There are two the taper sheaths 16.The inner surface of the taper sheath one end is the cone section extended out, the cone section and test specimen axis pin The cone match on upper outer circumference surface;The taper sheath other end is isometrical section.Have in the middle part of 16 external peripheral surface of taper sheath The positioning table of radially protruding;The taper sheath inner surface is that the external peripheral surface of cone section one end is also the conical surface, in order to install aligning Roller bearing 17.
The middle part of 14 length direction of test specimen axis pin is isometrical section, this isometrical section is trial zone;Described isometrical section Outer diameter is identical with the internal diameter of test specimen axle sleeve.The both ends of the test specimen axis pin are thread segment, for installing clamp nut.Described etc. The inner conical surface of the cone section gradually shunk between footpath section and thread segment for outer diameter to both ends, the cone section and taper sheath coordinates, for protecting It demonstrate,proves test specimen axis pin and taper sheath is coaxial.
The rocking arm 18 includes rocking arm rocking bar and rocker-arm link, and the end face of one end of rocker-arm link and the rocking arm The end face of rocking bar upper end is connected, and the other end of rocker-arm link is fixed on an end face of fixture inner ring 11.To realize the rocking arm Connecting rod is connected with the rocking arm rocking bar top end face, and in the rocker-arm link, there is threaded connection hole in the end end face;The rocker-arm link The other end have 90 ° of folded plate, have the threaded connection hole being connected with fixture inner ring 11 on the folded plate.The upper end of the rocking arm rocking bar For the lath of rectangle, the top of the lath is useful for connecting the through hole of the connecting rod;The lower end of the rocking arm rocking bar is semicircle Block for the eccentric rotary inertia of balancing rocker arm, eliminates the interference loaded to test specimen of rocking arm centrifugal force in rotation process. The semicircle block is useful for being connected the connecting hole of torque sensor with the lath junction.
The rack is welded by a pedestal 1,4 root posts 2 and an installing plate 3, and four columns 2 are solid respectively It is scheduled on four angles of 1 upper surface of pedestal;Installing plate 3 is fixed on the upper surface of each column.The horizontal stroke of the installing plate Section is concave, and the groove bottom of the groove is the mounting surface of the second support 20 and the first support 6, in the mounting surface Geometric center has 22 installation through-hole of pressurized strut for penetrating through the installing plate upper and lower surface, in the both sides of the pressurized strut installation through-hole, leans on There are the mounting hole of displacement sensor 21 in two long edge positions of the nearly installing plate 3 respectively.
The installation through-hole of multiple second support, 20 and first supports 6 is provided on the mounting surface of the installing plate, to meet not With the test requirements document of size test specimen.The center of each installation through-hole is symmetrical with the center line of the mounting surface width, To meet the positioning of second support and the first support.
In Fig. 1 and Fig. 3, pressurized strut lower end is mounted in rack base, and upper end is equipped with pull pressure sensor, pressure The upper end of sensor is connected with fixture outer ring.The both sides of fixture outer ring are provided with the measuring basis block of displacement sensor.It is installing The position of corresponding two measuring basis blocks is separately installed with a displacement sensor on plate.The pressurized strut and expansion connecting sleeve It is standard component.
, it is necessary to dismantle the first support 6 and the second support 20 in test specimen installation process, and need the size adjusting according to test specimen First support 6 and the second support the distance between 20.First support 6 and the second support 20 are separately mounted in installation board slot, and It can be slided along installing plate.By machine plus etc. modes, can make to have between the first support 6 and the second support 20 and installing plate easily It is higher coaxial to ensure that two self-aligning roller bearings 17 in the first support 6 and the second support 20 have for higher fit precision Property.
During experiment, test specimen wear extent is by the way of two pass bands, i.e.,:It is surveyed respectively by two displacement sensors Test specimen wear extent is measured, the actual wear amount of test specimen is represented with the average of two measured values, can be eliminated because fixture outer ring is in servo electricity The lower measurement error caused by fine rotation of machine torque effect.Similarly, test specimen moment of friction is equally by the way of two pass bands, I.e.:The moment of friction of measurement pin shaft end and sleeve end is distinguished with two torque sensors, is then come with the average of two measured values Characterize the actual moment of friction of test specimen.

Claims (8)

1. a kind of friction wear testing machine, which is characterized in that including rack, two servomotors, two torque sensors, two Self-aligning roller bearing, two speed reducers, the first support, the second support, fixture, test specimen axis pin, rocking arm, displacement sensor, tension and compression Force snesor and pressurized strut;The rack includes pedestal and installing plate;
The geometric center of the installing plate has pressurized strut mounting hole;Pressurized strut is fixed on the upper surface of pedestal;The start of pressurized strut Bar passes through the pressurized strut mounting hole;First support and the second support are separately mounted to the upper surface of the installing plate, and along rack Long side direction is distributed in the both sides of the pressurized strut mounting hole;On the inside support plate of the described first support and in the second support There is through hole on collateral plate respectively, two taper sheaths are mounted on the described first support and the second support by self-aligning roller bearing respectively Inside support plate on through hole in;The taper surface at the both ends of test specimen axis pin is respectively charged into described two taper sheaths;The test specimen Axis pin is mounted on the center of fixture, and the fixture outer ring of fixture is mounted on the upper end of pull pressure sensor, pull pressure sensor installation On the operating bar top of pressurized strut;The pressurized strut is fixed on the upper surface of base plate;Two displacement sensors are installed respectively In two long sides of the installing plate, and positioned at the both sides of fixture;
There are one torque sensors for installation between the outside support plate of the described first support and inside support plate;The torque sensor One end is connected with the test specimen axis pin on the inside of the first support inside support plate;The other end of the torque sensor and a speed reducer It is affixed;The speed reducer is connected with servomotor;
Also there are one torque sensors for installation between the outside support plate of the described second support and inside support plate;The torque sensor One end and the rocking arm rocking bar lower end of rocking arm be connected;The other end of the torque sensor is affixed with being mounted on another speed reducer; The speed reducer is connected with servomotor;The upper end of the rocking arm rocking bar and one end of rocker-arm link are connected;The rocker-arm link is another One end and fixture inner ring are affixed;
A servomotor is located on the outside of the outside support plate of the described first support in two servomotors, another servo Motor is located on the outside of the outside support plate of the described second support.
2. friction wear testing machine as described in claim 1, which is characterized in that the fixture is including in fixture outer ring, fixture Circle, test specimen axle sleeve, expansion connecting sleeve and ball bearing, according to test specimen axle sleeve, expansion connecting sleeve, fixture inner ring, ball bearing and The order of fixture outer ring is set in together successively, and the test specimen axle sleeve is made to be located at innermost circle, and fixture outer ring is made to be located at outmost turns; After the test specimen axle sleeve, expansion connecting sleeve and fixture inner ring are set in together, test specimen axle sleeve is realized by the expansion connecting sleeve With the tight fit of fixture inner ring;Between the fixture outer ring and ball bearing, between ball bearing and fixture inner ring be interference Cooperation.
3. friction wear testing machine as claimed in claim 2, which is characterized in that the internal diameter and expansion connecting sleeve of the fixture inner ring Outer diameter it is identical, and make tight fit therebetween;There is the mounting hole of rocking arm on an end face of the fixture inner ring;The swelling The internal diameter of connector sleeve is identical with the outer diameter of test specimen axle sleeve, and makes tight fit therebetween;The internal diameter and ball of the fixture outer ring The outer diameter of bearing is identical;The external peripheral surface of the fixture outer ring is processed as from all directions, symmetrical on the outer surface of the fixture outer ring A pair of of convex block is distributed with, which is the measuring basis block of displacement sensor, and the measuring basis block of the displacement sensor It is corresponding with the position of described two displacement sensors respectively.
4. friction wear testing machine as described in claim 1, which is characterized in that described first support is "U" shaped, by this The vertical plates on both sides of one support has respectively constituted outside support plate and inside support plate, and makes support plate and the folder on the inside of this in assembling Have adjacent;There is the via of speed reducer output shaft on the outside support plate;There is mounting hole on the periphery of the via;In the inside There is the mounting hole of self-aligning roller bearing on support plate;Second support is identical with the structure of first support;Due to The second support one side is equipped with rocking arm, therefore the second support baseboard upper surface is machined with the concave surface of avoidance.
5. friction wear testing machine as described in claim 1, which is characterized in that the inner surface of described taper sheath one end extends out Bore section, the cone section and the cone match on test specimen axis pin upper outer circumference surface;The taper sheath other end is isometrical section;The taper sheath There is the positioning table of radially protruding in the middle part of external peripheral surface;The taper sheath inner surface is that the external peripheral surface of cone section one end is also cone Face, in order to install self-aligning roller bearing.
6. friction wear testing machine as described in claim 1, which is characterized in that the middle part of the test specimen axis pin length direction for etc. Footpath section, this isometrical section is trial zone;Described isometrical section of outer diameter is identical with the internal diameter of test specimen axle sleeve;The two of the test specimen axis pin It holds as thread segment, for installing clamp nut;In the cone that described isometrical section is gradually shunk between thread segment for outer diameter to both ends The inner conical surface of section, the cone section and taper sheath coordinates, for ensureing that test specimen axis pin and taper sheath are coaxial.
7. friction wear testing machine as described in claim 1, which is characterized in that the rocking arm includes rocking arm rocking bar and rocking arm connects Bar, and the end face of one end of rocker-arm link and the end face of the rocking arm rocking bar upper end are connected, and the other end of rocker-arm link is fixed On an end face of fixture inner ring;To realize being connected for the rocker-arm link and the rocking arm rocking bar top end face, in the rocking arm There is threaded connection hole in the connecting rod end end face;The other end of the rocker-arm link has 90 ° of folded plate, has on the folded plate and consolidates with fixture inner ring Threaded connection hole even;The upper end of the rocking arm rocking bar is the lath of rectangle, and the top of the lath is useful for connecting the connecting rod Through hole;The lower end of the rocking arm rocking bar is semicircle block, for the eccentric rotary inertia of balancing rocker arm, is eliminated in rotation process The interference loaded to test specimen of rocking arm centrifugal force;The semicircle block is useful for being connected torque biography with the lath junction The connecting hole of sensor.
8. friction wear testing machine as described in claim 1, which is characterized in that the cross section of the installing plate is concave, And the groove bottom of the groove is the mounting surface of the second support and the first support, has in the geometric center of the mounting surface and penetrates through the peace The pressurized strut installation through-hole of loading board upper and lower surface, in the both sides of the pressurized strut installation through-hole, two long sides close to the installing plate There is the mounting hole of displacement sensor at place respectively;
The installation through-hole of multiple second supports and the first support is provided on the mounting surface of the installing plate, is tried with meeting different sizes The test requirements document of part;The center of each installation through-hole is symmetrical with the center line of the mounting surface width, to meet State the positioning of the second support and the first support.
CN201720370423.1U 2017-04-11 2017-04-11 A kind of friction wear testing machine Expired - Fee Related CN207379856U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110031224A (en) * 2019-05-06 2019-07-19 浙江省机电产品质量检测所 Roller bearing Dynamic performance examination machine
CN110095368A (en) * 2019-05-09 2019-08-06 燕山大学 Lower interference fit face fretting damage test device is acted on for bending connected load
CN111912720A (en) * 2020-07-17 2020-11-10 中国航发湖南动力机械研究所 Centrifugal loading device for photosensitive resin model

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110031224A (en) * 2019-05-06 2019-07-19 浙江省机电产品质量检测所 Roller bearing Dynamic performance examination machine
CN110031224B (en) * 2019-05-06 2020-09-29 浙江省机电产品质量检测所有限公司 Roller bearing dynamic performance testing machine
CN110095368A (en) * 2019-05-09 2019-08-06 燕山大学 Lower interference fit face fretting damage test device is acted on for bending connected load
CN111912720A (en) * 2020-07-17 2020-11-10 中国航发湖南动力机械研究所 Centrifugal loading device for photosensitive resin model

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