CN105092021A - Device and method for testing marine-shafting torsion vibration - Google Patents
Device and method for testing marine-shafting torsion vibration Download PDFInfo
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- CN105092021A CN105092021A CN201510219812.XA CN201510219812A CN105092021A CN 105092021 A CN105092021 A CN 105092021A CN 201510219812 A CN201510219812 A CN 201510219812A CN 105092021 A CN105092021 A CN 105092021A
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- scrambler
- vibration
- testing
- marine shafting
- sensing part
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Abstract
The invention relates to a device for testing marine-shafting torsion vibration. The device is characterized by comprising a torsion vibration
sensor consisting of a belt drum and an encoder on the belt drum, wherein an output shaft of the belt drum is fixed with the encoder, the belt
drum is in transmission connection with a to-be-tested shafting component via a belt, and the output of the encoder is connected with a signal
acquisition instrument in connection with a signal acquisition computer. The invention also provides a method for testing marine-shafting torsion
vibration. Compared with the prior art, the invention has the advantages that the belt drum is in transmission connection with the to-be-tested
shafting component via the belt, accuracy of torsion vibration signals at test points is achieved by means of the encoder, and reliable and
accurate test-point data can be provided for marine-shafting torsion vibration analysis; meanwhile, quick acquisition, storage and post-processing
of torsion vibration signals are realized on
a computer terminal, thereby achieving efficient, convenient and accurate test and analysis of marine-shafting torsion vibration.
Description
Technical field
The present invention relates to the device and method of a kind of marine shafting twisting vibration test, particularly relate to a kind of can realize in each position of marine shafting that the marine shafting twisting vibration of marine shafting twisting vibration testing and analyzing is tested device and method of testing.
Background technology
In Ship Power Equipment, axle system is used to transmit the power of main frame and airscrew thrust, it is arranged between the output terminal of main frame and screw propeller, include the transmission shaft of transmission main engine power, such as thrust axis, intermediate shaft, tailing axle, propeller shaft etc., with bearing and other annex of supporting drive shaft, there is the features such as size is large, complex structure.Marine shafting vibration fault can cause the damage of the parts such as marine main engine, bearing, screw propeller, therefore, needs to carry out vibration-testing to marine shafting before using.
Marine shafting vibration comprises twisting vibration (abbreviation torsional oscillation), horizontally to shake and longitudinal vibration, is the important vibration index evaluating marine shafting serviceability, is also one of the important Appreciation gist of boats and ships basic propulsion system whether security of operation.Existing torsional vibration test is general adopts Hall number tooth sensor, gathers flywheel end gear cyclic pulse signal, thus realizes the collection of shaft torsional vibration signals.There is the problem of three aspects in the method: (1) installation site is limited, is only limitted to be arranged on flywheel position, and be vertical position relationship between sensor with gear teeth face, and its assemblage gap is 1 ~ 3mm; (2) number of teeth of gear obtains not easily, and the number of teeth is the call parameter of shafting torsional oscillation test, needs before measuring to mark on gear, and at least one circle of main frame jiggering, thus obtain the number of teeth; (3) measuring accuracy is not fixed, because the shafting torsional oscillation signal gathered is transformed by gear pulse, therefore its measuring accuracy is relevant to structural parameters such as gear structure, modulus, the numbers of teeth, even there will be because precision is too low, the incredible situation of test result.Also have to adopt and install flange additional at main frame free end, install and gathered the method for shafting torsional oscillation signal by scrambler; Although the method measuring accuracy is high, need to process the joint flange matched with tested main frame in advance, and technological requirement is higher, particularly installs the right alignment of flange additional; Therefore, there is the shortcomings such as cost is high, assembling is difficult, installation site is fixing, therefore, need to be improved further the device of marine shafting twisting vibration test.
Summary of the invention
A technical matters to be solved by this invention be provide for above-mentioned prior art present situation a kind of can as required flexible arrangement point position marine shafting twisting vibration test device.
Another technical matters to be solved by this invention is the method for testing providing a kind of said apparatus for above-mentioned prior art present situation.
The present invention solves the problems of the technologies described above adopted technical scheme: the device of this marine shafting twisting vibration test, it is characterized in that: comprise be arranged on shaft components to be measured axle on the surface for experiencing and transmitting the torsional oscillation sensing part of the twisting vibration of shaft components to be measured, described torsional oscillation sensing part includes belt rotating cylinder and is arranged on the scrambler on described belt rotating cylinder, output shaft and the scrambler of described belt rotating cylinder fix, and described belt rotating cylinder is in transmission connection by belt and shaft components to be measured, the output connection signal Acquisition Instrument of described scrambler, described signal sampler connection signal gathers computer.
Further, also include the pedestal be fixed on by described torsional oscillation sensing part on hull, wherein, be provided with above described pedestal can slippage in described pedestal sliding stand and be connected on described sliding stand with by mounting bracket fixing for described torsional oscillation sensing part.
Further, described mounting bracket includes mutual vertically disposed upper support seat and lower support seat, the through hole supplying the input end of described scrambler to pass is provided with in the middle part of described upper support seat, and the mounting hole of at least one fixing described scrambler is respectively arranged with in described bore periphery, and described lower support seat is also provided with the pilot hole of at least one fixing described scrambler.During installation, after the input end of scrambler being passed the through hole of upper support seat, scrambler is fixed on together with belt rotating cylinder on mounting hole on upper support seat and lower support seat and pilot hole by bolt, nut.
Further, Flange joint is passed through between the input end of described scrambler and described belt rotating cylinder.The input end of this scrambler is connected with the form of flange by key, and is effectively fixed by set bolt, prevents both Relative sliding.
The present invention also provides a kind of method of testing of marine shafting device for testing torsion and vibration, it is characterized in that: comprise the steps:
1. select torsional vibration point position, described torsional oscillation sensing part is installed, and by the distance between described slide unit adjustment torsional oscillation sensing part and shaft components to be measured;
2. connect torsional vibration signal acquisition instrument, be connected to signals collecting computer, open testing software, can start to test torsional vibration; Wherein need to calculate equivalent recurrent pulse number, computing formula is
n
e＝K
n×D
0
In formula, n
efor equivalent period umber of pulse; K
nfor equivalent coefficient, 1.2/mm; D
0for measured axis diameter, mm, equivalent coefficient depends on the structure of described belt pulley and the type of scrambler.
3. by step 2. in the equivalent period umber of pulse of scrambler just can obtain axle and rotate angular velocity in one week process between any two pulses, the dynamic change of angular velocity is by obtaining marine shafting twisting vibration data after pulse signal and data processing.
Further, described scrambler produces 120 effective impulses in one-period.Effective impulse number can play decisive role to measuring accuracy.
Compared with prior art, the invention has the advantages that and provide a kind of proving installation and the method that can realize carrying out marine shafting twisting vibration testing and analyzing without restriction in each position of marine shafting, belt rotating cylinder is in transmission connection by belt and shaft components to be measured, and the accuracy of measuring point torsional vibration signals is realized by scrambler, for marine shafting analysis on Torsional Vibration provides reliable, measuring point data accurately, realize the Quick Acquisition of torsional vibration signals at terminal simultaneously, store and aftertreatment, realize efficient, convenient, torsional vibration testing and analyzing accurately, facilitate boats and ships performance test unit, shipyard Quality Control Department door, ship inspection and shipowner test to boats and ships basic propulsion system behavior in service and evaluate.
Accompanying drawing explanation
Fig. 1 is the structural representation of marine shafting device for testing torsion and vibration in the embodiment of the present invention;
Fig. 2 is the structural representation of torsional oscillation sensing part in the embodiment of the present invention;
Fig. 3 is the front elevation of mounting bracket upper support seat in the embodiment of the present invention;
Fig. 4 is the front elevation of mounting bracket lower support seat in the embodiment of the present invention;
Fig. 5 is the front elevation of mounting bracket in the embodiment of the present invention;
Fig. 6 is the front elevation of flange in the embodiment of the present invention;
Fig. 7 is the structural representation of belt rotating cylinder in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As shown in Fig. 1 ~ 7, the device of this marine shafting twisting vibration test comprise be arranged on shaft components to be measured axle on the surface for experiencing and transmitting the torsional oscillation sensing part 4 of the twisting vibration of shaft components to be measured, the scrambler 41 that torsional oscillation sensing part 4 includes belt rotating cylinder 43 and is arranged on belt rotating cylinder 43, output shaft and the scrambler 41 of belt rotating cylinder 43 fix, and belt rotating cylinder 43 is in transmission connection by belt 42 and shaft components to be measured, the output connection signal Acquisition Instrument 6 of scrambler 41, signal sampler 6 connection signal gathers computer 7.
In order to adjust the distance between torsional oscillation sensing part 4 and shaft components to be measured, the device of marine shafting twisting vibration test also includes the pedestal 1 be fixed on by torsional oscillation sensing part 4 on hull, wherein, be provided with above pedestal 1 can slippage in pedestal 1 sliding stand 2 and be connected on sliding stand 2 with by mounting bracket 3 fixing for torsional oscillation sensing part 4.Particularly, mounting bracket 3 includes mutual vertically disposed upper support seat 31 and lower support seat 32, the through hole 311 supplying the input end of scrambler 41 to pass is provided with in the middle part of upper support seat 31, and the mounting hole 312 of four regular coding devices 41 is respectively arranged with at through hole 311 periphery, and lower support seat 32 is also provided with accordingly the pilot hole 412 of four regular coding devices 41.During installation, after only the input end of scrambler 41 need being passed the through hole 311 of upper support seat 31, scrambler 41 is fixed on mounting hole 312 on upper support seat 31 and lower support seat 32 and pilot hole 412 by bolt, nut, and is connected by flange 5 between the input end of scrambler 41 with belt rotating cylinder 43.
When this marine shafting device for testing torsion and vibration is installed, first flange 5 realizes being connected reliably by bolt with belt rotating cylinder 43, simultaneously, mounting bracket 3 and scrambler 41 pass through bolt, nut combinations is integral, then the input end of scrambler 41 and flange 5 be connected by the form of key and effectively fixed by set bolt, to prevent both Relative sliding further, last mounting bracket 3 realizes fixedly mounting by bolt and manual sliding stand 2, and manual sliding stand 2 is also be fixed to pedestal 1 for belt rotating cylinder 43 being installed to Ship Structure by bolt pattern, to be assembled good after, connect torsional vibration signal acquisition instrument 6 again, finally be connected to signals collecting computer 7.
In addition, the method for testing of marine shafting device for testing torsion and vibration of the present invention, comprises the steps:
1. select torsional vibration point position, torsional oscillation sensing part 4 is installed, and by the distance between slide unit adjustment torsional oscillation sensing part 4 and shaft components to be measured;
2. connect torsional vibration signal acquisition instrument 6, be connected to signals collecting computer 7, open testing software, can start to test torsional vibration; Wherein need to calculate equivalent recurrent pulse number, computing formula is
n
e＝K
n×D
0
In formula, n
efor equivalent period umber of pulse; K
nfor equivalent coefficient, 1/mm; D
0for measured axis diameter, mm, equivalent coefficient depends on the structure of belt pulley and the type of scrambler 41.
3. by step 2. in the equivalent period umber of pulse of scrambler just can obtain axle and rotate angular velocity in one week process between any two pulses, the dynamic change of angular velocity is by obtaining marine shafting twisting vibration data after pulse signal and data processing.
The model that scrambler 41 is selected in the present embodiment is LF-12BM-C05D, can produce 120 effective impulses, play decisive role to measuring accuracy in one-period.
Claims (6)
1. the device of a marine shafting twisting vibration test, it is characterized in that: comprise be arranged on shaft components to be measured axle on the surface for experiencing and transmitting the torsional oscillation sensing part (4) of the twisting vibration of shaft components to be measured, described torsional oscillation sensing part (4) includes belt rotating cylinder (43) and is arranged on the scrambler (41) on described belt rotating cylinder (43), output shaft and the scrambler (41) of described belt rotating cylinder (43) fix, and described belt rotating cylinder (43) is in transmission connection by belt (42) and shaft components to be measured, the output connection signal Acquisition Instrument (6) of described scrambler (41), described signal sampler (6) connection signal gathers computer (7).
2. the device of marine shafting twisting vibration test according to claim 1, it is characterized in that: also include the pedestal (1) described torsional oscillation sensing part (4) be fixed on hull, wherein, described pedestal (1) top be provided with can slippage described pedestal (1) in sliding stand (2) and be connected on described sliding stand (2) with by described torsional oscillation sensing part (4) fix mounting bracket (3).
3. the device of marine shafting twisting vibration test according to claim 2, it is characterized in that: described mounting bracket (3) includes mutual vertically disposed upper support seat (31) and lower support seat (32), described upper support seat (31) middle part is provided with the through hole (311) supplying the input end of described scrambler (41) to pass, and the mounting hole (312) of at least one fixing described scrambler (41) is respectively arranged with at described through hole (311) periphery, and described lower support seat (32) is also provided with the pilot hole (412) of at least one fixing described scrambler (41).
4. the device of marine shafting twisting vibration test according to claim 3, is characterized in that: the input end of described scrambler (41) is connected by flange (5) with between described belt rotating cylinder (43).
5. a method of testing for the marine shafting device for testing torsion and vibration as described in Claims 1 to 4, is characterized in that: comprise the steps:
1. select torsional vibration point position, described torsional oscillation sensing part (4) is installed, and by the distance between described slide unit adjustment torsional oscillation sensing part (4) and shaft components to be measured;
2. connect torsional vibration signal acquisition instrument (6), be connected to signals collecting computer (7), open testing software, can start to test torsional vibration; Wherein need to calculate equivalent recurrent pulse number, computing formula is
n
g＝K
n×D
0
In formula, n
gfor equivalent period umber of pulse; K
nfor equivalent coefficient, 1/mm; D
0for measured axis diameter, mm, equivalent coefficient depends on the structure of described belt pulley and the type of scrambler (41).
3. by step 2. in the equivalent period umber of pulse of scrambler just can obtain axle and rotate angular velocity in one week process between any two pulses, the dynamic change of angular velocity is by obtaining marine shafting twisting vibration data after pulse signal and data processing.
6. the method for testing of marine shafting device for testing torsion and vibration according to claim 5, is characterized in that: described scrambler (41) produces 120 effective impulses in one-period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510219812.XA CN105092021A (en) | 2015-04-30 | 2015-04-30 | Device and method for testing marine-shafting torsion vibration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510219812.XA CN105092021A (en) | 2015-04-30 | 2015-04-30 | Device and method for testing marine-shafting torsion vibration |
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| CN105092021A true CN105092021A (en) | 2015-11-25 |
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| CN201510219812.XA Pending CN105092021A (en) | 2015-04-30 | 2015-04-30 | Device and method for testing marine-shafting torsion vibration |
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Cited By (7)
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| CN106404411A (en) * | 2016-08-26 | 2017-02-15 | 哈尔滨东安汽车发动机制造有限公司 | Engine stand crankshaft torsional oscillation test device and test method thereof |
| CN106706114A (en) * | 2017-02-21 | 2017-05-24 | 北京汽车研究总院有限公司 | Vehicle transmission shaft torsional vibration characteristic acquisition device |
| CN106864664A (en) * | 2016-12-28 | 2017-06-20 | 浙江海洋大学 | Marine shafting performance test apparatus under a kind of Ice Load |
| CN107576389A (en) * | 2017-09-14 | 2018-01-12 | 浙江海洋大学 | A kind of torsional vibration monitoring device |
| CN109000777A (en) * | 2018-08-27 | 2018-12-14 | 浙江海洋大学 | A kind of marine shafting twisting vibration measuring system calibrating installation |
| CN109297660A (en) * | 2018-08-21 | 2019-02-01 | 浙江海洋大学 | A kind of marine shafting device for testing torsion and vibration |
| CN111637961A (en) * | 2020-06-01 | 2020-09-08 | 东风汽车集团有限公司 | Drive shaft torsional vibration testing arrangement |
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| CN109297660A (en) * | 2018-08-21 | 2019-02-01 | 浙江海洋大学 | A kind of marine shafting device for testing torsion and vibration |
| CN109000777A (en) * | 2018-08-27 | 2018-12-14 | 浙江海洋大学 | A kind of marine shafting twisting vibration measuring system calibrating installation |
| CN111637961A (en) * | 2020-06-01 | 2020-09-08 | 东风汽车集团有限公司 | Drive shaft torsional vibration testing arrangement |
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