CN105527088A - Fatigue test stand for torsion damper and fatigue test method thereof - Google Patents
Fatigue test stand for torsion damper and fatigue test method thereof Download PDFInfo
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- CN105527088A CN105527088A CN201610032422.6A CN201610032422A CN105527088A CN 105527088 A CN105527088 A CN 105527088A CN 201610032422 A CN201610032422 A CN 201610032422A CN 105527088 A CN105527088 A CN 105527088A
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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
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Abstract
The invention discloses a fatigue test stand for a torsion damper. The fatigue test stand comprises an experiment platform, the torsion damper, a torsion vibration shaft and a permanent magnet synchronous motor having a controller. The experiment platform is equipped with a first base, a second base and a third base through bolts. The first base is equipped with a thermostatic chamber; the torsion damper is arranged in the thermostatic chamber; the torsion damper is connected with a damper connection disc; the damper connection disc is connected with one end of the torsion vibration shaft; the other end of the torsion vibration shaft is connected with the output shaft of the permanent magnet synchronous motor through a shaft coupler; the torsion vibration shaft passes through the second base and the third base; and an inertia disc group is detachably arranged on the torsion vibration shaft between the second base and the third base. The test stand not only can realize high-frequency torsion vibration similar to that in engine test, but also can realize adjustable inherent frequency of the device, thereby reducing the original very-long test period and achieving the quick detection effect. The invention also discloses a fatigue test method for carrying out reliability test on different torsion dampers by utilizing the test stand.
Description
Technical field
The present invention relates to engine torque vibration damper testing fatigue field, specifically, relate to a kind of fatigue test board for torsional vibration damper and method for testing fatigue thereof.
Background technology
Silicon oil damper is widely used crankshaft vibration damper on diesel engines at present.Can the twisting vibration of significantly damp crankshaft free end with the silicon oil damper of crankshaft system matched well, thus ensure the reliability service of diesel engine.Therefore, the reliability of silicon oil damper directly can affect whole aircraft reliability.In the design phase, after silicon oil damper matched design completes, need to be arranged on engine crankshaft, inspection effectiveness in vibration suppression also carries out Reliability Check Test, can produce in batches after reaching requirement.At mass-production stage, also need to take out Check inspection to vibration damper.A large amount of real machine tests, will certainly the human and material resources of at substantial and financial resources.
But because torsional vibration damper generally has the higher life-span, therefore, general mechanical excitation testing table mechanism, due to the restriction in its serviceable life, is difficult to the fail-test being applied to vibration damper.Therefore, design a set of mechanism for testing with high dependability and serviceable life, realize the twisting vibration excitation of silicon oil damper significant.
Existing torsional vibration damper testing table is generally form twisting motion by the mode of machinery, mostly utilize geometric center and not overlapping of the center of inertia and produce alternation moment to test, but be difficult to the dither resulting from the similar 150HZ of engine actual machine test, and the permanance of existing testing table is poor.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of fatigue test board for torsional vibration damper is provided, this testing table can reach the high frequency torsional oscillation close with engine test, again can implement device natural frequency adjustable, make it the testing fatigue being applicable to many moneys vibration damper, and by set mechanism, torsional oscillation motion is amplified, the originally very long test period can be shortened, reach the effect detected fast; Another object of the present invention utilizes above-mentioned fatigue test board to provide a kind of method for testing fatigue that can carry out reliability testing accurately and efficiently to different torsional vibration damper.
The object of the invention is to be achieved through the following technical solutions:
A kind of fatigue test board for torsional vibration damper, comprise experiment porch, torsional vibration damper, torsional oscillation axle and the permagnetic synchronous motor with controller, described controller is connected with signal generator, described experiment porch is provided with the first base by bolt, second base and the 3rd base, described first base is provided with by bolt the constant temperature oven that inwall is coated with heat insulation foam, described torsional vibration damper is arranged in described constant temperature oven, the side of described constant temperature oven is provided with the mounting hole for installing photoelectric sensor, described torsional vibration damper has been bolted vibration damper terminal pad, described vibration damper terminal pad is connected with one end of described torsional oscillation axle, the other end of torsional oscillation axle is connected with the output shaft of permagnetic synchronous motor by shaft coupling, torsional oscillation axle is through having described second base and the 3rd base, dismountable on torsional oscillation axle between second base and the 3rd base inertia disk group is installed.
Described torsional oscillation axle is connected with the circular conical surface interference adopting nut to compress between vibration damper terminal pad.
The top of described constant temperature oven is provided with at least two circular holes for fixing heating tube.The back side of described constant temperature oven is also provided with chamber door.
For a method for testing fatigue for the fatigue test board of torsional vibration damper, step is as follows:
(1) check in the experiment condition of torsional vibration damper according to the test specification of torsional vibration damper to be measured, comprise rotating speed, torsional excitation frequency and test duration, calculate the damage ratio D of torsional vibration damper each run in demarcation situation
1
Wherein, N
1for the fatigue lifetime that torsional oscillation amplitude in specification is corresponding, n
1for the test loop number calculated under specification frequency;
(2) torsional vibration damper is installed, each junction of careful check test platform, start-up connector and signal generator;
(3) by signal generator, swept-frequency signal is applied to testing table, measure and analysis result, find out the resonant frequency of testing table, torsional vibration signals is applied according to the resonant frequency recorded, make biasing torque identical with the natural frequency of testing table, record the torsional oscillation amplitude of torsional vibration damper under resonance conditions;
(4) calculate torsional vibration damper shell according to torsional oscillation amplitude and shearing stress computing formula and vibrate suffered shearing stress under this torsional oscillation amplitude, search Materials Handbook S-N curve obtain resonance conditions under life-span N, and under making resonance conditions equivalent damage D
2d is damaged with equivalent under standard condition
1equal, calculate cycle index n, and calculate theoretical work time t (hour) under resonance conditions according to torsional excitation frequency meter;
(5) set the amplitude of voltage signal in signal generator, waveform and frequency, start permagnetic synchronous motor, start test, and the amplitude signal of a record per hour torsional vibration damper;
(6), when reaching the theoretical work time t in step (4) when the test duration of torsional vibration damper, amplitude signal during contrast t in the amplitude signal that records and step (5), finally judges whether tested torsional vibration damper lost efficacy.
Compared with prior art, the beneficial effect that technical scheme of the present invention is brought is:
(1) in the present invention permagnetic synchronous motor with controller, controller is connected with signal generator, change the energisation mode of traditional torsional vibration damper testing table, can be controlled by electric signal completely, simple amendment signal generator can realize the adjustment of rotary motion, person's operation easy to use; Owing to no longer adopting mechanical excitation, testing table Torsional Systems can reach the transient equilibrium of 2000rpm, thus ensure that the permanance of mechanical mechanism.
(2) dismountable on torsional oscillation axle of the present invention inertia disk group is installed, inertia disk group is adjustable, the natural frequency of system can be changed by the inertia disk of using different-thickness instead or the mode superposing the second inertia disk in inertia disk, make the natural frequency of system close with torture test frequency, and then reach resonance state when testing, amplify the torsional oscillation amplitude that motor exports, reach the effect of strenuous test, greatly can shorten test period, reduce energy resource consumption.
(3) the present invention adds constant temperature oven in the installation site of torsional vibration damper, makes the temperature of working environment when environment temperature residing for tested torsional vibration damper and engine actual machine test identical, ensures that silicon oil viscosity is not put to the test the impact of environment temperature.Described constant temperature oven side is provided with the mounting hole for installing photoelectric sensor, gathers tach signal for photoelectric sensor.In addition the back side of constant temperature oven is also provided with chamber door, makes need not dismantle whole constant temperature oven when changing torsional vibration damper, and opening chamber door can complete, convenient and swift.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of inertia disk group.
Fig. 3 be in Fig. 2 A-A to sectional structure schematic diagram.
Fig. 4 is the structural representation of constant temperature oven.
Fig. 5 is the circular conical surface interference connection diagram adopting nut to compress between torsional oscillation axle and vibration damper terminal pad.
Reference numeral: 1-experiment porch 2-first base 3-second base 4-the 3rd base 5-constant temperature oven 6-torsional vibration damper 7-vibration damper terminal pad 8-torsional oscillation axle 9-inertia disk group 10-shaft coupling 11-permagnetic synchronous motor 12-controller 13-signal generator 50-mounting hole 51-chamber door 52-bolt hole
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figures 1 to 4, a kind of fatigue test board for torsional vibration damper, comprise experiment porch 1, torsional vibration damper 6, torsional oscillation axle 8 and the permagnetic synchronous motor 11 with controller 12, controller 12 is connected with signal generator 13, experiment porch 1 is provided with the first base 2, second base 3 and the 3rd base 4 by bolt, floor can be added with the stability of strengthen test platform according to actual conditions on three bases;
First base 2 is provided with constant temperature oven 5 by bolt, and the bottom of constant temperature oven 5 is provided with the bolt hole 52 corresponding with the first base 2, in order to be fixed on experiment porch 1 by constant temperature oven 5; Torsional vibration damper 6 to be measured is arranged in described constant temperature oven, the top of constant temperature oven 5 has at least two circular holes for fixing heating tube, inwall is coated with heat insulation foam, by regulating the power of heating tube, constant temperature the temperature inside the box is controlled as temperature when torsional vibration damper 6 commonly uses operating mode, to reduce warm-up times, and complete the quick detection of torsional vibration damper 6 effectiveness in vibration suppression at each temperature; The side of constant temperature oven 5 has the mounting hole 50 for installing photoelectric sensor, and after experimental provision integral installation, torsional vibration damper 6 code-disc circumferentially can expose in mounting hole 50 place, gathers tach signal for photoelectric sensor; The back of constant temperature oven 5 is provided with chamber door 51, and when changing torsional vibration damper 6, need not dismantle whole constant temperature oven 5, opening chamber door 51 can complete.
Torsional vibration damper 6 has been bolted vibration damper terminal pad 7, vibration damper terminal pad 7 is by being connected with one end of torsional oscillation axle 8, the other end of torsional oscillation axle 8 is connected by the output shaft of shaft coupling 10 with permagnetic synchronous motor 11, as shown in Figure 5, the circular conical surface interference adopting nut to compress between torsional oscillation axle 8 with vibration damper terminal pad 7 is connected, for convenience detach, circular conical surface is heat-treated adding man-hour, improves intensity; Torsional oscillation axle is through having described second base 3 and the 3rd base 4, torsional oscillation axle 8 in the present embodiment between the second base 3 and the 3rd base 4 is provided with connection shallow bid, connect shallow bid and be connected with inertia disk group 9 by bolt, by changing the inertia disk of different-thickness or superpose other inertia disk to change the natural frequency of system in inertia disk in inertia disk group 9.
By above-mentioned fatigue test board, torsional vibration damper is carried out to the method for testing fatigue, concrete steps are as follows:
(1) the failtests condition of torsional vibration damper to be measured is checked according to the test specification of torsional vibration damper to be measured, torsional vibration damper in the present embodiment is silicon oil damper, rotating speed 3000rpm when checking in its actual machine test, torsional excitation frequency 150Hz, torsional oscillation amplitude A
1=0.2 ° and test duration 1000h.The damage ratio D of silicon oil damper each run in demarcation situation is calculated with this
1
Wherein, N
1for demarcating life-span corresponding to the lower 0.2 ° of torsional oscillation amplitude of situation, can check according to S-N curve is 10
9secondary, n
1for period 150 × 1000 × 3600=5.4 × 10 under stress level each under actual condition
8secondary;
(2) install silicon oil damper, whether each junction of careful check test platform exists loosening, connects all parts, start-up connector and signal generator;
(3) apply swept-frequency signal by signal generator to testing table, measure and analysis result, determine the resonant frequency of testing table.Apply torsional vibration signals according to the resonant frequency recorded, make biasing torque identical with the natural frequency of testing table, record the torsional oscillation amplitude A of silicon oil damper under resonance conditions
2=0.75 °;
(4) according to torsional oscillation amplitude and shearing stress computing formula, calculate silicon oil damper shell vibrate suffered shearing stress by computer software under this amplitude, searching the life-span that Materials Handbook S-N curve obtains under resonance conditions is N
2=10
8secondary, and the equivalent damage D under making resonance conditions
2d is damaged with equivalent under standard condition
1equal, calculate cycle index n
2=5.4 × 10
7secondary, and be t=100 (hour) according to the theoretical work time that torsional excitation frequency meter calculates under resonance conditions.
(5) amplitude of voltage signal in signal generator, waveform and frequency is set, start permagnetic synchronous motor, start test, the amplitude signal of each hour record silicon oil damper, if silicon oil damper did not lose efficacy, the amplitude signal at every turn recorded was almost constant;
(6), after silicon oil damper being carried out to the testing fatigue of t=100 hour, whether the amplitude signal in contrast amplitude signal now and step (5) exists significant difference, thus judges whether silicon oil damper tested in the present embodiment lost efficacy.
In addition, for above-mentioned torsional vibration damper fatigue test board, based on the principle of resonant method damping test, the damping value of torsional vibration damper can be recorded.When its ultimate principle is based on resonance test, all and between the damping of torsional vibration damper there is funtcional relationship one to one in the threshold frequency of system and the resonance amplitude of testing table, specific implementation is: first by computer calculate testing table resonant frequency, corresponding relation between amplitude and damping, draws out the damping characteristic curve of relation curve between them and testing table according to result of calculation; Then, on testing table, by applying swept-frequency signal, activating system resonates, and measures frequency now and amplitude, thus on damping characteristic curve, find corresponding damping value.
The present invention is not limited to above-described embodiment.Be intended to describe and technical scheme of the present invention is described to the description of embodiment above, above-mentioned embodiment is only schematic, is not restrictive.Do not departing under the ambit that present inventive concept and claim protect, those of ordinary skill in the art also can make the concrete conversion of a lot of form under enlightenment of the present invention, and these all belong within protection scope of the present invention.
Claims (5)
1. the fatigue test board for torsional vibration damper, comprise experiment porch, torsional vibration damper, torsional oscillation axle and the permagnetic synchronous motor with controller, it is characterized in that, described controller is connected with signal generator, described experiment porch is provided with the first base by bolt, second base and the 3rd base, described first base is provided with by bolt the constant temperature oven that inwall is coated with heat insulation foam, described torsional vibration damper is arranged in described constant temperature oven, the side of described constant temperature oven is provided with the mounting hole for installing photoelectric sensor, described torsional vibration damper has been bolted vibration damper terminal pad, described vibration damper terminal pad is connected with one end of described torsional oscillation axle, the other end of torsional oscillation axle is connected with the output shaft of permagnetic synchronous motor by shaft coupling, torsional oscillation axle is through having described second base and the 3rd base, dismountable on torsional oscillation axle between second base and the 3rd base inertia disk group is installed.
2. a kind of fatigue test board for torsional vibration damper according to claim 1, is characterized in that, described torsional oscillation axle is connected with the circular conical surface interference adopting nut to compress between vibration damper terminal pad.
3. a kind of fatigue test board for torsional vibration damper according to claim 1, is characterized in that, the top of described constant temperature oven is provided with at least two circular holes for fixing heating tube.
4. a kind of fatigue test board for torsional vibration damper according to claim 1 or 3, it is characterized in that, the back side of described constant temperature oven is also provided with chamber door.
5. the method for testing fatigue of a kind of fatigue test board for torsional vibration damper according to claim 1, step is as follows:
(1) check in the experiment condition of torsional vibration damper according to the test specification of torsional vibration damper to be measured, comprise rotating speed, torsional excitation frequency and test duration, calculate the damage ratio D of torsional vibration damper each run in demarcation situation
1
Wherein, N
1for the fatigue lifetime that torsional oscillation amplitude in specification is corresponding, n
1for the test loop number calculated under specification frequency;
(2) torsional vibration damper is installed, each junction of careful check test platform, start-up connector and signal generator;
(3) by signal generator, swept-frequency signal is applied to testing table, measure and analysis result, determine the resonant frequency of testing table, torsional vibration signals is applied according to the resonant frequency recorded, make biasing torque identical with the natural frequency of testing table, record the torsional oscillation amplitude of torsional vibration damper under resonance conditions;
(4) calculate torsional vibration damper shell according to torsional oscillation amplitude and shearing stress computing formula and vibrate suffered shearing stress under this torsional oscillation amplitude, search Materials Handbook S-N curve obtain resonance conditions under life-span N, and under making resonance conditions equivalent damage D
2d is damaged with equivalent under standard condition
1equal, calculate cycle index n, and calculate theoretical work time t (hour) under resonance conditions according to torsional excitation frequency meter;
(5) set the amplitude of voltage signal in signal generator, waveform and frequency, start permagnetic synchronous motor, start test, and the amplitude signal of a record per hour torsional vibration damper;
(6), when reaching the theoretical work time t in step (4) when the test duration of torsional vibration damper, amplitude signal during contrast t in the amplitude signal that records and step (5), finally judges whether tested torsional vibration damper lost efficacy.
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| CN106807614A (en) * | 2017-01-20 | 2017-06-09 | 广西大学 | A kind of torsional excitation device excited by electromagnetic actuators |
| CN106989922A (en) * | 2017-05-16 | 2017-07-28 | 上海明华电力技术工程有限公司 | Shafting Safety Analysis Method during a kind of motor frequency conversion operation |
| CN107063610A (en) * | 2017-06-02 | 2017-08-18 | 南方英特空调有限公司 | A kind of four axle electromagnetism torsional oscillation comprehensive test platforms |
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| CN106989922A (en) * | 2017-05-16 | 2017-07-28 | 上海明华电力技术工程有限公司 | Shafting Safety Analysis Method during a kind of motor frequency conversion operation |
| CN106989922B (en) * | 2017-05-16 | 2019-01-29 | 上海明华电力技术工程有限公司 | Shafting Safety Analysis Method when a kind of motor frequency conversion is run |
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| CN107063610B (en) * | 2017-06-02 | 2023-07-21 | 南方英特空调有限公司 | Four-axis electromagnetic torsional vibration comprehensive test platform |
| CN107290081A (en) * | 2017-06-08 | 2017-10-24 | 高铁检测仪器（东莞）有限公司 | A kind of constant temperature torsion adjuster detector and method of testing |
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| CN109668727B (en) * | 2019-01-14 | 2023-07-18 | 扬州大学 | Fatigue test device and method for vibration reduction gear of automobile engine |
| CN109668727A (en) * | 2019-01-14 | 2019-04-23 | 扬州大学 | A kind of fatigue experimental device and its method of automobile engine vibration-reduction gear |
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| CN111811815A (en) * | 2020-07-30 | 2020-10-23 | 重庆长安汽车股份有限公司 | System and method for testing natural frequency of torsional vibration reduction belt pulley |
| CN112595503A (en) * | 2020-11-26 | 2021-04-02 | 浙江晟克科技有限公司 | Torsional fatigue test driving mechanism, testing machine, testing method and storage medium |
| CN114199711A (en) * | 2021-11-30 | 2022-03-18 | 天津大学 | Torque calibration method for tension-torsion fatigue testing machine |
| CN114199711B (en) * | 2021-11-30 | 2024-01-09 | 天津大学 | Torque calibration method for tension-torsion fatigue testing machine |
| CN114264466A (en) * | 2021-12-23 | 2022-04-01 | 潍柴动力股份有限公司 | Method and device for predicting service life of vibration damper |
| CN114264466B (en) * | 2021-12-23 | 2024-03-19 | 潍柴动力股份有限公司 | Method and device for predicting service life of shock absorber |
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Inventor after: Bi Fengrong Inventor after: Yao Yuru Inventor after: Ma Teng Inventor after: Liu Jianfei Inventor after: Yang Xiao Inventor after: Qi Bin Inventor after: Tian Sailong Inventor after: Bi Xiaoyang Inventor after: Bi Xiaobo Inventor before: Bi Fengrong Inventor before: Yao Yuru Inventor before: Ma Teng Inventor before: Liu Jianfei Inventor before: Yang Xiao Inventor before: Qi Bin |
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