CN108871769B - Fixed involute spline pair fretting wear test device - Google Patents
Fixed involute spline pair fretting wear test device Download PDFInfo
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- CN108871769B CN108871769B CN201810793793.5A CN201810793793A CN108871769B CN 108871769 B CN108871769 B CN 108871769B CN 201810793793 A CN201810793793 A CN 201810793793A CN 108871769 B CN108871769 B CN 108871769B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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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
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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Abstract
The invention discloses a fixed involute spline pair fretting wear test device which specifically comprises a base, a driving unit, a tested unit, a supporting device, a loader, a measuring unit and a counterweight adjusting unit. The driving unit consists of a variable frequency motor and a coupling; the tested unit comprises a coupler I with an external spline, an internal spline shaft sleeve I, an external spline shaft, an internal spline shaft sleeve II and a coupler II with an external spline. The spline pair in the unit to be tested is driven by the variable frequency motor to rotate, and torque is applied through the loader. The measured unit is supported by the supporting device in the rotating process, the misalignment amount of the spline pair is measured through the laser displacement sensor in the measuring unit, and the misalignment amount can be adjusted through the balance weight adjusting unit. The invention provides a fretting wear test device capable of realizing simultaneous test of two or more groups of fixed involute spline pairs, which can truly simulate the wear condition of the spline pairs in a fixed state in transmission.
Description
Technical Field
The invention relates to a fixed involute spline pair fretting wear test device, and belongs to the technical field of fretting tribology in mechanical engineering.
Background
The involute spline pair is composed of an inner spline and an outer spline, the involute spline pair has the characteristic of good centering performance, theoretically, the inner spline shaft and the outer spline shaft are completely centered, and all key teeth of the spline pair are uniformly loaded. For a spline pair, the misalignment can cause uneven stress of each spline tooth, and a local spline tooth bears huge load, so that the spline tooth bears periodic alternating load in the rotation process of the spline shaft, and simultaneously, the contact tooth surfaces of the internal spline and the external spline can generate larger relative slippage, thereby causing fretting wear and fretting fatigue to fail as a spline by-product, and even possibly causing instant fracture of the local spline tooth due to too large load or fracture due to conventional fatigue.
Patent CN 106124209a discloses a spline pair fretting wear test bench, the test bed adjusts the non-centering amount of the angle and the radial non-centering amount of the spline pair through a mechanical device, although the simulation of the non-centering amount is solved, but the test bed adopts a mechanical method, the simulated angular misalignment and radial misalignment are fixed quantities, and the spline pair has the advantages that in the actual operation process, the angle non-centering amount and the radial non-centering amount are changed amounts, and in order to solve the defects of the invention, the fixed involute spline pair fretting wear test device enables an internal spline shaft sleeve in operation to generate centrifugal force and moment with certain magnitude through the adjustment of 2 groups of counter weights with different weights, the axial lines of the inner spline shaft sleeve and the outer spline shaft are enabled to realize the angular misalignment and the radial misalignment by a mechanical method, and the angular misalignment and the radial misalignment are changed quantities.
Because the general hardness of the material for processing the involute spline is higher, the wear test of the general spline is ultra-long cycle times and ultra-long time, and the neutral and micro axial movement is inevitable in the test process, so that the fixed involute spline pair fretting wear test device is disclosed. This fixed involute fretting wear experimental apparatus processes required pattern into with inside and outside spline as required, makes into the sleeve pattern with the inside spline, and the outside spline at both ends is made into unilateral pattern that has the spline tooth, and the outside spline shaft in the centre of two interior spline connections is processed into the pattern that both ends all have the spline tooth and have the step, installs inside and outside spline connection in proper order, and the outside spline shaft and the aligning roller bearing cooperation of both ends area spline tooth are fixed a position with the hole retaining ring. Compared with other experimental devices, the device has the advantages of simple structure, high efficiency, greatly shortened experimental time and the like, and is particularly suitable for high-precision motion systems with small displacement.
Disclosure of Invention
The invention aims to provide a fixed involute spline pair fretting wear test device which can simultaneously measure fretting wear of two or more groups of involute spline pairs at one time and greatly shorten the test time. The device can carry out fretting wear tests of different working conditions and materials.
The technical scheme for realizing the aim comprises the following steps:
a fixed involute spline pair fretting wear test device specifically comprises a base, a driving unit, a unit to be tested, a supporting device, a loader, a measuring unit and a counterweight adjusting unit; the driving unit consists of a variable frequency motor and a coupling; the tested unit comprises a coupler I with an external spline, an internal spline shaft sleeve I, an external spline shaft, an internal spline shaft sleeve II and a coupler II with an external spline; the measuring unit comprises a torque rotating speed sensor, a laser displacement sensor, a data acquisition device and a computer; the supporting device consists of a supporting frame, a self-aligning roller bearing and a retainer ring for holes; the counterweight adjusting unit comprises a stud, a counterweight block, a nut and a gasket; a variable frequency motor, a loader and a laser displacement sensor are fixed on the base, and an output shaft of the variable frequency motor, a coupler, a torque rotating speed sensor, a coupler I with an external spline, an internal spline shaft sleeve I, an external spline shaft, an internal spline shaft sleeve II, a coupler II with an external spline and the loader are sequentially connected; the stud is screwed into the inner threaded holes of the inner spline shaft sleeves I and II, and the balancing weight is screwed on the stud through the gasket and the nut; the torque rotating speed sensor is used for detecting rotating speed and torque in a test, and the laser displacement sensor is used for measuring misalignment of the spline pair.
Above-mentioned vice fretting wear test device of fixed involute spline, internal spline axle sleeve I and II with the external spline axle constitutes the spline pair respectively, and the external spline axle is supported by self-aligning roller bearing among the device supports.
According to the fixed involute spline pair fretting wear test device, 1 group of balance weights are mounted at the left end and the right end of each of the inner spline shaft sleeves I and II, each group of balance weights comprises 3 balance weights, and each group of balance weights are spaced at an angle of 120 degrees on the circumference; the minimum distance between the edge of the balancing weight and the left and right side faces of the inner spline shaft sleeve is 5mm, namely, cylindrical outer surface areas of more than 5mm are reserved at the two ends of the inner spline shaft sleeve and are used as data acquisition areas of the laser displacement sensor; the mass interval of the balancing weight is 10g-500g, and the mass specification follows geometric progression distribution with geometric coefficient of 2; in the experimental process, the internal spline shaft sleeve in operation generates centrifugal force and moment with certain size through the adjustment of 2 groups of different weight balancing weights, so that the axial line of the internal spline shaft sleeve and the axial line of the external spline shaft are not aligned in angle and radial direction.
According to the fixed involute spline pair fretting wear test device, the two ends of the outer spline shaft are both in a tooth form, and the middle of the outer spline shaft is in a step form.
According to the fixed involute spline pair fretting wear test device, the spline pair in the tested unit rotates under the driving of the variable frequency motor, the output rotating speed range of the variable frequency motor is 0-1440r/min, and the rated torque is 500 N.m.
According to the fixed involute spline pair fretting wear test device, one inner spline shaft sleeve is meshed with two outer spline shafts at one time.
According to the fixed involute spline pair fretting wear test device, the loader is used for simulating the load action and can be a magnetic powder brake or a disc brake; the rotating speed range of the loader is 0-1440r/min, and the torque range is 0-500 N.m.
Above-mentioned vice fretting wear test device of fixed involute spline, the spline that internal spline axle sleeve and external spline shaft in the unit under test are constituteed is vice can be the multiunit, can measure the vice not to the middling of multiunit spline simultaneously.
According to the fixed involute spline pair fretting wear test device, the self-aligning roller bearing is installed on the outer spline shaft and is positioned on the support frame through the retainer ring for holes.
Compared with the prior art, the invention has the beneficial effects that:
the invention makes the inner spline shaft sleeve in operation generate a certain centrifugal force and moment through the gravity center adjusting device (the balancing weight is connected with the stud), thereby the simulation of the angle of the inner spline shaft sleeve and the axis of the outer spline shaft on the non-neutral radial non-neutral quantity is realized, the non-neutral quantity can be measured through the laser displacement sensor, and the auxiliary supporting part can make the invention approach the real working condition of the fixed involute spline pair; the method has extremely important significance in the aspects of recognizing the fretting wear of the spline pair, providing a method and a measure for improving the fretting wear of the spline pair, improving the fretting wear resistance of the spline pair and the like.
Drawings
Fig. 1 is a schematic front view of an embodiment of the present invention.
FIG. 2 is an enlarged view of the stud and weight structure of the present invention.
Fig. 3 is a left side view of fig. 2 of the present invention.
In the figure: the device comprises a variable frequency motor 1, a base 2, a torque speed sensor 3, a coupler I with a spline 4, a laser displacement sensor 5, a coupler 6, an internal spline shaft sleeve I7, a hole retainer ring 8, an external spline shaft 9, a self-aligning roller bearing 10, a data acquisition device 11, a computer 12, an internal spline shaft sleeve II 13, a support frame 14, a coupler II with a spline 15, a loader 16, a stud 17, a balancing weight 18, a nut 19 and a gasket 20.
Detailed Description
As shown in fig. 1, a fixed involute spline pair fretting wear test device specifically comprises a base (2), a driving unit, a unit to be tested, a supporting device, a loader (16), a measuring unit and a counterweight adjusting unit; the driving unit consists of a variable frequency motor (1) and a coupling (6); the tested unit comprises a coupler I (4) with an external spline, an internal spline shaft sleeve I (7), an external spline shaft (9), an internal spline shaft sleeve II (13) and a coupler II (15) with an external spline; the measuring unit comprises a torque rotating speed sensor (3), a laser displacement sensor (5), a data acquisition device (11) and a computer (12); the supporting device comprises a hole retainer ring (8), a self-aligning roller bearing (10) and a supporting frame (14); the counterweight adjusting unit comprises a stud (17), a counterweight block (18), a nut (19) and a gasket (20); the stud (17) is screwed into the internal thread holes of the internal spline shaft sleeves I (7) and II (13), and the balancing weight (18) is screwed on the stud (17) through the gasket (20) and the nut (19);
when the invention is used, the concrete steps are as follows:
1. installing a variable frequency motor (1), a laser displacement sensor (5), a loader (16) and a support frame (14) on a base (2) through bolts;
2. an output shaft of the variable frequency motor (1) is connected with a torque and rotating speed sensor (3) through a coupler (6);
3. connecting a torque and rotating speed sensor (3) with a coupler I (4) with a spline;
4. connecting the inner spline shaft sleeve I (7) with an outer spline shaft (9);
5. installing a self-aligning roller bearing (10) on an external spline shaft (9), and positioning on a support frame (14) by adopting a retainer ring (8) for holes;
6. connecting the external spline shaft (9) with the internal spline shaft sleeve II (13);
7. connecting a coupler II (15) with a spline on the right side with a loader (16);
8. and the balancing weight (18), the nut (19), the gasket (20) and the stud (17) are fixed on the internal spline shaft sleeve II (13) through threaded connection.
In the experimental process, 2 groups of different weight balancing weights (18) are adjusted to enable the running inner spline shaft sleeve II (13) to generate centrifugal force and moment with certain magnitude, so that the inner spline shaft sleeve II (13) is not aligned in angle and not aligned in radial direction with the axes of the outer spline shaft (9) and the right splined shaft coupler II (15), the laser displacement sensor (5) arranged below the inner spline shaft sleeve II (13), the outer spline shaft (9) and the right splined shaft coupler II (15) measures the misalignment, the data acquisition device (11) inputs the misalignment, the rotating speed and the torque information acquired by the laser displacement sensor (5) and the torque rotating speed sensor (3) into the computer (12), and finally the computer (12) carries out related statistical analysis.
Claims (9)
1. The utility model provides a vice fretting wear test device of fixed involute spline which characterized in that: the device comprises a base, a driving unit, a unit to be measured, a supporting device, a loader, a measuring unit and a counterweight adjusting unit; the driving unit consists of a variable frequency motor and a coupling; the tested unit comprises a coupler I with an external spline, an internal spline shaft sleeve I, an external spline shaft, an internal spline shaft sleeve II and a coupler II with an external spline; the measuring unit comprises a torque rotating speed sensor, a laser displacement sensor, a data acquisition device and a computer; the supporting device consists of a supporting frame, a self-aligning roller bearing and a retainer ring for holes; the counterweight adjusting unit comprises a stud, a counterweight block, a nut and a gasket; a variable frequency motor, a loader and a laser displacement sensor are fixed on the base, and an output shaft of the variable frequency motor, a coupler, a torque rotating speed sensor, a coupler I with an external spline, an internal spline shaft sleeve I, an external spline shaft, an internal spline shaft sleeve II, a coupler II with an external spline and the loader are sequentially connected; the stud is screwed into the inner threaded holes of the inner spline shaft sleeves I and II, and the balancing weight is screwed on the stud through the gasket and the nut; the left end and the right end of the internal spline shaft sleeves I and II are respectively provided with 1 group of counterweight blocks, each group comprises 3 counterweight blocks, and each group of counterweight blocks is spaced at 120 degrees on the circumference; the minimum distance between the edge of the balancing weight and the left and right side faces of the inner spline shaft sleeve is 5mm, namely, cylindrical outer surface areas of more than 5mm are reserved at the two ends of the inner spline shaft sleeve and are used as data acquisition areas of the laser displacement sensor; the inner spline shaft sleeve in operation generates centrifugal force and moment with certain magnitude by adjusting 2 groups of counter weights with different weights, so that the axial lines of the inner spline shaft sleeve and the outer spline shaft are not aligned in angle and radial direction; the self-aligning roller bearing is arranged on an external spline shaft, and the external spline shaft is supported by the self-aligning roller bearing; the torque rotating speed sensor is used for detecting rotating speed and torque in a test, and the laser displacement sensor is used for measuring misalignment of the spline pair.
2. The fixed involute spline pair fretting wear test device of claim 1, wherein: and the internal spline shaft sleeves I and II and the external spline shaft respectively form spline pairs.
3. The fixed involute spline pair fretting wear test device of claim 1, wherein: the mass interval of the balancing weight is 10g-500g, and the mass specification follows the geometric progression distribution with geometric coefficient of 2.
4. The fixed involute spline pair fretting wear test device of claim 1, wherein: the two ends of the external spline shaft are both in a toothed form, and the middle of the external spline shaft is in a step form.
5. The fixed involute spline pair fretting wear test device of claim 1, wherein: the spline pair in the unit to be tested rotates under the drive of the variable frequency motor, the output rotating speed range of the variable frequency motor is 0-1440r/min, and the rated torque is 500 N.m.
6. The fixed involute spline pair fretting wear test device of claim 1, wherein: an internal spline shaft sleeve is engaged with two external spline shafts at a time.
7. The fixed involute spline pair fretting wear test device of claim 1, wherein: the loader is used for simulating the load action and can be a magnetic powder brake or a disc brake; the rotating speed range of the loader is 0-1440r/min, and the torque range is 0-500 N.m.
8. The fixed involute spline pair fretting wear test device of claim 1, wherein: the spline pair composed of the internal spline shaft sleeve and the external spline shaft in the unit to be measured can be in multiple groups, namely the misalignment of multiple groups of spline pairs can be measured simultaneously.
9. The fixed involute spline pair fretting wear test device of claim 1, wherein: the self-aligning roller bearing is positioned on the support frame by adopting a check ring for holes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810793793.5A CN108871769B (en) | 2018-07-19 | 2018-07-19 | Fixed involute spline pair fretting wear test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810793793.5A CN108871769B (en) | 2018-07-19 | 2018-07-19 | Fixed involute spline pair fretting wear test device |
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| CN108871769A CN108871769A (en) | 2018-11-23 |
| CN108871769B true CN108871769B (en) | 2020-07-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109632305B (en) * | 2018-12-25 | 2020-12-29 | 哈尔滨工业大学 | Low-speed bearing vacuum running-in test control system |
| CN110553571B (en) * | 2019-09-10 | 2021-03-30 | 哈尔滨工程大学 | Shafting centering parameter measuring method |
| CN111006864B (en) * | 2019-11-22 | 2022-04-05 | 中国航发西安动力控制科技有限公司 | Spline shaft flexibility detection method and detection tool |
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|---|---|---|---|---|
| CN103335838A (en) * | 2013-06-06 | 2013-10-02 | 大连理工大学 | Misaligned spline vibration wear contrast experimental device |
| CN105513482A (en) * | 2015-11-27 | 2016-04-20 | 西安交通大学 | Mechanical fault comprehensive simulation test bed facilitating malfunctioned component replacement |
| CN106124209A (en) * | 2016-09-07 | 2016-11-16 | 湘潭大学 | Spline pair fretting wear testing stand |
| CN106932197A (en) * | 2017-03-13 | 2017-07-07 | 西北工业大学 | A kind of involute spline pair fretting wear testing stand |
| CN107389484A (en) * | 2017-07-11 | 2017-11-24 | 湘潭大学 | A kind of floating type involute spline pair fretting wear experimental rig |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2397387B (en) * | 2003-01-14 | 2006-03-29 | Rolls Royce Plc | Rotor balancing and drive shaft simulator therefor |
| KR100514481B1 (en) * | 2003-09-15 | 2005-09-14 | 현대자동차주식회사 | Device and method for adjusting misalignment of auxiliary-machinery belt pulley for vehicle |
| KR101475395B1 (en) * | 2013-05-16 | 2014-12-23 | 한국수력원자력 주식회사 | a testing device for detecting fault signals of journal bearing |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335838A (en) * | 2013-06-06 | 2013-10-02 | 大连理工大学 | Misaligned spline vibration wear contrast experimental device |
| CN105513482A (en) * | 2015-11-27 | 2016-04-20 | 西安交通大学 | Mechanical fault comprehensive simulation test bed facilitating malfunctioned component replacement |
| CN106124209A (en) * | 2016-09-07 | 2016-11-16 | 湘潭大学 | Spline pair fretting wear testing stand |
| CN106932197A (en) * | 2017-03-13 | 2017-07-07 | 西北工业大学 | A kind of involute spline pair fretting wear testing stand |
| CN107389484A (en) * | 2017-07-11 | 2017-11-24 | 湘潭大学 | A kind of floating type involute spline pair fretting wear experimental rig |
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