CN201926599U - Torsional composite fretting friction abrasion test equipment - Google Patents
Torsional composite fretting friction abrasion test equipment Download PDFInfo
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- CN201926599U CN201926599U CN2010205265203U CN201020526520U CN201926599U CN 201926599 U CN201926599 U CN 201926599U CN 2010205265203 U CN2010205265203 U CN 2010205265203U CN 201020526520 U CN201020526520 U CN 201020526520U CN 201926599 U CN201926599 U CN 201926599U
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Abstract
The utility model relates to torsional composite fretting friction abrasion test equipment. A special structure that a lower clamp (16) is arranged at the middle-lower part of a machine base (1) is like that: the lower clamp (16) is fixed on a mounting plate (12) on the output shaft of a high-precision ultra-low-speed rotary motor (13) by threaded connection, the center of a clamping cavity of the lower clamp (16) is arranged on the axis of the output shaft of the rotary motor (13), the rotary motor (13) is obliquely arranged on a motor inclined table with a setting inclined angle alpha, and the motor inclined table is fixed at the bottom part of the machine base (1). The torsional composite fretting friction abrasion test equipment is simple in structure, is easy to operate, can carry out torsional composite fretting friction abrasion test in different working conditions and material specifications, the control and test precision is high, the experimental data is accurate and reliable, and the repeatability is good.
Description
Technical field
The utility model relates to a kind of micro-moving frictional wear testing equipment.
Background technology
Fine motion (Fretting) is meant under alternate load effects such as mechanical vibration, fatigue load, electric and magnetic oscillation or thermal cycle, nominally the relative motion (displacement amplitude is generally micron dimension) that the amplitude that takes place between static surface in contact is minimum, i.e. fine motion occur in the mechanical part of " fastening " cooperation.Fine motion is prevalent in the wringing fit parts in mechanical industry, nuclear reactor, Aero-Space, science of bridge building, automobile, railway, boats and ships, power industry, armament systems, telecommunication equipment and artificial implanting device official rank field.The fine motion meeting that exists in the wringing fit parts causes member interlock, loosening, power loss, noise increases or form pollution source, perhaps produces fatigue crack and expansion, causes reduce greatly fatigue lifetime.Along with of the requirement of high-tech machinery to high precision, long-life and high reliability, and the harshness day by day of various working conditions, the harm of fretting damage shows especially day by day, has become the one of the main reasons that causes catastrophic failure, is called as " cancer " of industry member.
Under ball/plane contact condition, fine motion has 4 kinds of basic models, that is: tangential fine motion, radially fine motion, twisting or micro-moving and rotary micromotion.Fine motion operating mode actual in the industry is very complicated, often collects the compound compound movement of two or more fine motion basic model and also often occurs.
Reversing the coupling that (twisting+rotation) compound fine motion is twisting or micro-moving and two kinds of patterns of rotary micromotion, is the relative motion that the Contact Pair generation is reversed a little under the alternate load effect.Reverse compound fine motion phenomenon and be present in a large number in mechanized equipment and the apparatus, relate to various fields such as communications and transportation, biomedicine.For example hip joint in spherojoint and ball-and-socket mating surface, the human body implantation instrument and knee joint pestle mortar shape contact region, the interior fine motion that takes place of bearing etc. in the automobile steering system.Reverse fatigue and the wearing and tearing that compound fine motion causes and shortened the serviceable life of parts greatly, directly influenced safety in production, also brought enormous economic loss simultaneously.Because the restriction of research and analysis equipment and means, reverse less that correlative study, the analytical work of compound fine motion carry out all the time.Research and develop and reverse compound fine motion testing equipment, to reducing the complicated fretting wear problem that occurs in the engineering, improve the relevant design in fields such as machinery, bioengineering, the performance of raising equipment and apparatus and life-span, energy savings etc. have crucial meaning.
The utility model content
The purpose of this utility model just provides a kind of compound micro-moving frictional wear testing equipment that reverses, this device structure is simple, easy to operate, can carry out the compound micro-moving frictional wear test of reversing of different operating modes and gauge material, control and the precision height of testing, experimental data is more accurate, reliable, favorable reproducibility.
The technical scheme that its goal of the invention that realizes the utility model adopts is: a kind ofly reverse compound micro-moving frictional wear testing equipment, comprise the last test specimen on clamping plane last anchor clamps, go up anchor clamps by sextuple power/torque sensor and can carry out level and vertical mobile two dimension adjustment transfer table is fixed on the middle and upper part of support; The lower clamp of the following test specimen of clamping sphere is installed in the middle and lower part of support, it is characterized in that: the concrete structure that described lower clamp is installed in the middle and lower part of support is: lower clamp is threaded in the mounting disc on the turning motor output shaft that is fixed on the high precision Ultra-Low Speed, on the axis that is centered close to the turning motor output shaft in the clamping chamber of lower clamp, turning motor is mounted obliquely within on the motor tilting table by the inclined angle alpha of setting, and the motor tilting table is fixed on the bottom of support.
Turning motor, two-dimentional transfer table, sextuple power/torque sensor all are electrically connected with data acquisition control system.
The using method of this equipment and the course of work are:
To go up test specimen and be fixed on the anchor clamps, following test specimen is fixed on the lower clamp.Regulate the motor tilting table, it is fixing that motor is tilted to behind the set angle; By the motion of data acquisition control system control two dimension adjustment transfer table, test specimen makes it contact and apply given normal load with following test specimen in position vertical, horizontal both direction in the adjustment.Control the rotation of high precision Ultra-Low Speed turning motor again by data acquisition control system, test specimen is back and forth rotated around electric machine rotational axis by the parameter of setting, realize the compound fine motion of ball-plane torsion of upper and lower test specimen, in this process, tangential force (friction force) when compound fine motion is reversed in the monitoring in real time of sextuple power/torque sensor, send data acquisition control system to handle, obtain friction force-angular displacement amplitude (F
t-θ) curve.Simultaneously, normal load when sextuple power/torque sensor is monitored fine motion in real time, send data acquisition control system to, carry out real-time regulated control, guarantee that the normal load of test specimen is in constant set-point all the time down by the vertical position that data acquisition control system is adjusted transfer table to two dimension.
Given different parameter can be carried out the compound micro-moving frictional wear test of reversing under the different operating modes.For the upper and lower test specimen of different size, adopt the upper and lower anchor clamps of corresponding specification can finish test.
Compared with prior art, the beneficial effects of the utility model are:
One, motor inclination certain angle α in the equipment of the present utility model, make spherical following test specimen tilt to rotate, thereby realized that (the corresponding fine motion component of the horizontal component that tilts to rotate is a twisting or micro-moving for the dual compound fine motion that twists simultaneously and rotate between test specimen on spherical down test specimen and the plane, the fine motion component of vertical component correspondence is a rotary micromotion), thus can analyze and test reversing compound fine motion more authentic and validly.
Two, owing to the spherical center of test specimen down and the turning axle centering of high precision Ultra-Low Speed turning motor, high precision Ultra-Low Speed turning motor can guarantee that spherical test specimen turns round around electric machine rotational axis, and eccentric phenomena can not take place; Thereby guaranteeing to reverse compound fine motion is achieved.
Three,, can realize accurately that lower clamp and following test specimen thereof back and forth rotate by given micro-corner amplitude and ultralow rotating speed by the rotation of data acquisition control control system control high precision Ultra-Low Speed turning motor; Can realize accurately that also the adjustment of chucking position and the examination of setting normal load add, thereby accurately realize the compound micro-moving frictional wear test of reversing under the given parameter condition.
Tangential force friction force when four, measuring compound fine motion by the sextuple power/torque sensor that links to each other with last anchor clamps, and send data acquisition control system to handle, friction force under obtaining imposing a condition-angular displacement curve can accurately characterize the dynamics that reverses compound fine motion.And the material after the test can be carried out other correlation analysis.
In a word, this testing equipment can easily make material that the compound micro-moving frictional wear of reversing of accurate minute angle takes place, test is directly controlled given corresponding test parameter by data acquisition control system, and measure friction force, analyze automatically and handle, can simulate the compound fretting damage of member under the complex stress effect more truly, experimental result is more accurate, reliable; Control and the precision height of testing, the favorable reproducibility of experimental data, and automaticity height.Overcome existing experimental facilities result and had unicity, defectives such as poor reproducibility.
Consisting of of above-mentioned motor tilting table: the fuselage of turning motor is fixed in the motor fixed cover, and the motor fixed cover places the inner chamber of motor cabinet, and the axis hole of the turning axle of motor fixed cover both sides and motor cabinet cooperates; The deep-slotted chip breaker that fastening bolt passes on the motor cabinet is connected with screw on the motor fixed cover, and the arc core of deep-slotted chip breaker is on the axis of turning axle, and motor cabinet is fixed in the bottom of support.
Like this, the motor fixed cover can center on the turning axle run-off the straight easily, tilting to is arbitrarily undertaken fastening by fastening bolt behind the set angle, thereby the inclination that realizes easily being fixed on the motor in the motor fixed cover is carried out the compound fine motion test of reversing between the upper and lower test specimen in any angle of inclination with fixing.
The both sides that above-mentioned motor fixed cover is installed turning axle have several pilot holes, and motor cabinet also has corresponding positioning through hole, and register pin passes positioning through hole and is inserted on the pilot hole.
Like this, the level that has that can utilize register pin to carry out the angle of inclination is easily adjusted (as: 0 °, 5 °, 10 ° etc.), makes the adjustment of angle simple more, convenient, accurately.
Above-mentioned motor fixed cover is installed by the two sides of turning axle and the inner chamber of motor cabinet is the interference fit of trace, the inner chamber side of motor cabinet and support bottom vertical.
Like this, the motor revolving shaft of inclination is remained at grade, the inclination angle of setting is maintained fixed, the stability of motor fixed cover is better, and the test result of test more accurately, reliably.
The fuselage of above-mentioned turning motor tightly fits in the inner chamber of motor fixed cover, and the fuselage bottom of turning motor is installed in the bottom of motor fixed cover, and by bolted.
This makes turning motor accurately to locate and to be fixed on securely on the motor fixed cover.
The bottom peripheral edge of above-mentioned lower clamp surrounds circular-shaped, concave cavity, the side of the mounting disc on the turning motor output shaft and this circular-shaped, concave cavity wringing fit to lower convexity.
Like this, the simple structure between lower clamp and the mounting disc, easy for installation, transmission is direct, can guarantee lower clamp and turning motor output shaft centering and location.Because the center line of motor output mounting disc and the center line of electric machine rotational axis are overlapping, in the time of can guaranteeing that lower clamp clamps test specimen, the rotation centerline and the turning motor turning axle of spherical test specimen down are overlapping, guarantee that eccentric phenomena does not take place when test specimen rotates down sphere, test result shows: beating degree≤2 μ m when spherical test specimen of the present utility model rotates are achieved thereby guarantee to reverse compound fine motion.
The upper end of above-mentioned sextuple power/torque sensor be installed in two dimension adjust transfer table cross sliding clock on.
Sextuple power/torque sensor is installed in two dimension and adjusts between the cross sliding clock and last anchor clamps of transfer table, moving horizontally of trace can take place in sextuple power/torque sensor, can guarantee to make that suffered tangential force is accurate friction force between its upper and lower test specimen that determines.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Description of drawings
Fig. 1 is the main TV structure synoptic diagram of the utility model embodiment.
Fig. 2 is the not lower clamp during test specimen and the sectional structure enlarged diagram of motor output mounting disc under the clamping among the utility model embodiment.
Fig. 3 a, Fig. 3 b, Fig. 3 c be with the utility model embodiment in motor inclined angle alpha=10 °, friction force-angular displacement amplitude (Ft-θ) curve under three kinds of different angular displacement amplitudes.The last test specimen of test is the LZ50 axle steel test block of 20mm * 10mm * 10mm, the GCr15 bearing steel ball that following test specimen is Φ 40mm, and normal load Fn=50N, rotational angular velocity are 0.2 °/s, the reciprocation cycle cycle is 1000 times.Wherein, the rotational displacement amplitude θ of Fig. 3 a, Fig. 3 b, Fig. 3 c is respectively 0.125 °, 0.5 °, 2 °.
Fig. 4 a, Fig. 4 b, Fig. 4 c are respectively identical with Fig. 3 a, Fig. 3 b, Fig. 3 c experiment material, its test parameters is also basic identical, only the motor inclined angle alpha all changes 40 ° into, and the equipment of present embodiment is tested friction force-angular displacement amplitude (Ft-θ) curve that obtains.
Embodiment
Fig. 1,2 illustrates, a kind of embodiment of the present utility model is: a kind ofly reverse compound micro-moving frictional wear testing equipment, comprise the last test specimen 6 on clamping plane last anchor clamps 5, go up anchor clamps 5 by sextuple power/torque sensor 4 and can carry out level and vertical mobile two dimension adjustment transfer table 2 is fixed on the middle and upper part of support 1; The lower clamp 16 of the following test specimen 14 of clamping sphere is installed in the middle and lower part of support 1, it is characterized in that: the concrete structure that described lower clamp 16 is installed in the middle and lower part of support 1 is: lower clamp 16 is threaded in the mounting disc 12 on turning motor 13 output shafts that are fixed on the high precision Ultra-Low Speed, on the axis that is centered close to turning motor 13 output shafts in the clamping chamber of lower clamp 16, turning motor 13 is mounted obliquely within on the motor tilting table by the inclined angle alpha of setting, and the motor tilting table is fixed on the bottom of support 1.
Turning motor 13, two-dimentional transfer table, sextuple power/torque sensor 4 all are electrically connected with data acquisition control system.
Consisting of of the motor tilting table that this is routine: the fuselage of turning motor 13 is fixed in the motor fixed cover 18, and motor fixed cover 18 places the inner chamber of motor cabinet 19, and the axis hole of the turning axle 17 of motor fixed cover 18 both sides and motor cabinet 19 cooperates; The deep-slotted chip breaker 20 that fastening bolt 22 passes on the motor cabinet 19 is connected with screw on the motor fixed cover 18, and the arc core of deep-slotted chip breaker 20 is on the axis of turning axle 17, and motor cabinet 19 is fixed in the bottom of support 1.
The both sides that motor fixed cover 18 is installed turning axle 17 have several pilot holes, and motor cabinet 19 also has corresponding positioning through hole, and register pin 21 passes positioning through hole and is inserted on the pilot hole.
Motor fixed cover 18 is installed by the two sides of turning axle and the inner chamber of motor cabinet 19 is the interference fit of trace, the inner chamber side of motor cabinet 19 and support bottom vertical.
The concrete structure that the fuselage of turning motor 13 is fixed in the motor fixed cover 18 is: the fuselage of turning motor 13 tightly fits in the inner chamber of motor fixed cover 18, and the fuselage bottom of turning motor 13 is installed in the bottom of motor fixed cover 18, and by bolted.
The bottom peripheral edge of lower clamp 16 surrounds circular-shaped, concave cavity 26, the side 12a of the mounting disc 12 on turning motor 13 output shafts and this circular-shaped, concave cavity 26 wringing fits to lower convexity.
The upper end of sextuple power/torque sensor 4 be installed in two dimension adjust transfer table 2 cross sliding clock 2A on.
The utility model can be realized the inclination in various degree of high precision Ultra-Low Speed turning motor, and the scope of inclined angle alpha is 0 °-90 °.The normal load measurement range of sextuple power/torque sensor 4 that the utility model adopts is 1-580N; The tangential force measurement range that laterally reaches vertical both direction is 1-180N, and the torgue measurement scope is that 1-10000N.mm, measuring accuracy are 1Nmm.
The concrete test findings of part that adopts above equipment of the present utility model to carry out is as follows:
Test material is: going up test specimen is the LZ50 axle steel test block of 20mm * 10mm * 10mm, the GCr15 bearing steel ball that following test specimen is Φ 40mm, and common test parameters is: normal load F
n=50N, rotational angular velocity are 0.2 °/s, reciprocation cycle cycle 1000 times.
Be 10 ° in the motor inclined angle alpha, rotational displacement amplitude θ is respectively 0.125 °, 0.5 °, the 2 ° friction force of testing to obtain-angular displacement amplitude (F
t-θ) curve is respectively Fig. 3 a, Fig. 3 b, Fig. 3 c.
Be 40 ° in the motor inclined angle alpha, rotational displacement amplitude θ is respectively 0.125 °, 0.5 °, the 2 ° friction force of testing to obtain-angular displacement amplitude (F
t-θ) curve is respectively Fig. 4 a, Fig. 4 b, Fig. 4 c.
As can be seen from the figure, the curve shape of Fig. 3 a, Fig. 4 a is the collimation line style, Fig. 3 b, Fig. 4 b ovalize Fig. 3 c, Fig. 4 c parallelogram, part slip region, mixed zone, the slip region of corresponding fine motion successively.
Through observing α=10 °, the mill spot evolution process and the corresponding surface topography that obtain under the different cycle indexes during θ=2 °.Find that reverse compound fine motion under test condition, its feature obviously is different from single jog mode, presents the asymmetry of tangible compound fine motion.
By (inclined angle alpha is respectively 10 ° and 40 ° to corresponding diagram 3c, Fig. 4 c test back, the observation of the stereoscan photograph of last test specimen angular displacement amplitude θ=2 °), as can be seen under the differing tilt angles to reverse compound fine motion behavior different fully, and under less inclined angle alpha, abrasive dust is toward discharging on one side and piling up, and under bigger inclined angle alpha, abrasive dust is piled up in the both sides of direction of motion.
By observation to the polishing scratch cross-sectional profiles photo of test specimen on corresponding diagram 6a, Fig. 6 b, the contact region presents two kinds of different " protuberance " phenomenons under two kinds of different angles of inclination, slip region as can be seen, under less inclined angle alpha, " protuberance " is asymmetric, hangs down height while present; And under bigger inclined angle alpha, " protuberance " be symmetry substantially, and both sides are higher than the center, and there were significant differences for the situation in this and other jog mode.
Claims (7)
1. one kind is reversed compound micro-moving frictional wear testing equipment, comprise the last test specimen (6) on clamping plane last anchor clamps (5), go up anchor clamps (5) by sextuple power/torque sensor (4) and can carry out level and vertical mobile two dimension adjustment transfer table (2) is fixed on the middle and upper part of support (1); The lower clamp (16) of the following test specimen (14) of clamping sphere is installed in the middle and lower part of support (1), it is characterized in that: the concrete structure that described lower clamp (16) is installed in the middle and lower part of support (1) is: lower clamp (16) is threaded in the mounting disc (12) on turning motor (13) output shaft that is fixed on the high precision Ultra-Low Speed, on the axis that is centered close to turning motor (13) output shaft in the clamping chamber of lower clamp (16), turning motor (13) is mounted obliquely within on the motor tilting table by the inclined angle alpha of setting, and the motor tilting table is fixed on the bottom of support (1);
Turning motor (13), two dimension are adjusted transfer table (2), sextuple power/torque sensor (4) all is electrically connected with data acquisition control system.
2. testing equipment according to claim 1, it is characterized in that: the consisting of of described motor tilting table: the fuselage of turning motor (13) is fixed in the motor fixed cover (18), motor fixed cover (18) places the inner chamber of motor cabinet (19), and the axis hole of the turning axle (17) of motor fixed cover (18) both sides and motor cabinet (19) cooperates; The deep-slotted chip breaker (20) that fastening bolt (22) passes on the motor cabinet (19) is connected with screw on the motor fixed cover (18), and the arc core of deep-slotted chip breaker (20) is on the axis of turning axle (17), and motor cabinet (19) is fixed in the bottom of support (1).
3. testing equipment according to claim 2, it is characterized in that: the both sides that described motor fixed cover (18) is installed turning axle (17) have several pilot holes, motor cabinet (19) also has corresponding positioning through hole, and register pin (21) passes positioning through hole and is inserted on the pilot hole.
4. testing equipment according to claim 2 is characterized in that: described motor fixed cover (18) is installed the two sides of turning axle and the inner chamber of motor cabinet (19) is micro-interference fit, the inner chamber side of motor cabinet (19) and support bottom vertical.
5. testing equipment according to claim 2, it is characterized in that: the concrete structure that the fuselage of described turning motor (13) is fixed in the motor fixed cover (18) is: the fuselage of turning motor (13) tightly fits in the inner chamber of motor fixed cover (18), the fuselage bottom of turning motor (13) is installed in the bottom of motor fixed cover (18), and by bolted.
6. testing equipment according to claim 1, it is characterized in that: the bottom peripheral edge of described lower clamp (16) surrounds circular-shaped, concave cavity (26) to lower convexity, the side (12a) of the mounting disc (12) on turning motor (13) output shaft and this circular-shaped, concave cavity (26) wringing fit.
7. testing equipment according to claim 1 is characterized in that: the upper end of described sextuple power/torque sensor (4) be installed in two dimension adjust transfer table (2) cross sliding clock (2A) on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205265203U CN201926599U (en) | 2010-09-13 | 2010-09-13 | Torsional composite fretting friction abrasion test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205265203U CN201926599U (en) | 2010-09-13 | 2010-09-13 | Torsional composite fretting friction abrasion test equipment |
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| Publication Number | Publication Date |
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| CN201926599U true CN201926599U (en) | 2011-08-10 |
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| CN2010205265203U Expired - Fee Related CN201926599U (en) | 2010-09-13 | 2010-09-13 | Torsional composite fretting friction abrasion test equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528945A (en) * | 2013-09-27 | 2014-01-22 | 清华大学 | Friction measurement device |
| CN103604713A (en) * | 2013-11-21 | 2014-02-26 | 西南交通大学 | Multidirectional fretting wear device and testing method for heat transmission pipe of steam generator |
| CN104777053A (en) * | 2015-04-22 | 2015-07-15 | 徐州天诺矿山设备有限公司 | Discrete element impact abrasion detection device and discrete element impact abrasion detection method |
| CN106625021A (en) * | 2017-03-20 | 2017-05-10 | 北京航空航天大学 | Loading device and loading method for testing reliability of electric spindle |
| CN108120591A (en) * | 2017-11-29 | 2018-06-05 | 中国飞机强度研究所 | A kind of test fixture for detachable tie-down point slow test |
-
2010
- 2010-09-13 CN CN2010205265203U patent/CN201926599U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528945A (en) * | 2013-09-27 | 2014-01-22 | 清华大学 | Friction measurement device |
| CN103604713A (en) * | 2013-11-21 | 2014-02-26 | 西南交通大学 | Multidirectional fretting wear device and testing method for heat transmission pipe of steam generator |
| CN103604713B (en) * | 2013-11-21 | 2016-01-13 | 西南交通大学 | A kind of multidirectional fretting wear device of steam generator heat-transfer pipe and test method |
| CN104777053A (en) * | 2015-04-22 | 2015-07-15 | 徐州天诺矿山设备有限公司 | Discrete element impact abrasion detection device and discrete element impact abrasion detection method |
| CN104777053B (en) * | 2015-04-22 | 2018-01-12 | 徐州市圣耐普特矿山设备制造有限公司 | A kind of discrete element pounding wear detection device and detection method |
| CN106625021A (en) * | 2017-03-20 | 2017-05-10 | 北京航空航天大学 | Loading device and loading method for testing reliability of electric spindle |
| CN106625021B (en) * | 2017-03-20 | 2018-11-27 | 北京航空航天大学 | A kind of loading device and loading method for electro spindle reliability test |
| CN108120591A (en) * | 2017-11-29 | 2018-06-05 | 中国飞机强度研究所 | A kind of test fixture for detachable tie-down point slow test |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20160913 |