CN202974424U - Experiment device for quantitatively analyzing the influence of flexure on whirling vibration of shafting - Google Patents
Experiment device for quantitatively analyzing the influence of flexure on whirling vibration of shafting Download PDFInfo
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- CN202974424U CN202974424U CN 201220525288 CN201220525288U CN202974424U CN 202974424 U CN202974424 U CN 202974424U CN 201220525288 CN201220525288 CN 201220525288 CN 201220525288 U CN201220525288 U CN 201220525288U CN 202974424 U CN202974424 U CN 202974424U
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- bearing assembly
- flywheel
- shafting
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Abstract
The purpose of the utility model is to provide an experiment device for quantitatively analyzing the influence of flexure on whirling vibration of a shafting. The experiment device comprises a shaft, a motor, a base, a bearing assembly, and a flywheel assembly, wherein the motor is connected with the bottom of the shaft, the shaft is connected with the base by the bearing assembly, and the flywheel assembly is mounted on the top of the shaft. The characteristic of the ship shafting is actually reflected, the influence of the flexure on the whirling vibration characteristic of the shafting is researched from the experiment angle, and the influence is revealed.
Description
Technical field
The utility model relates to a kind of experimental provision, specifically axle is experimental provision.
Background technology
Due to the distortion of effect, bearings system and the hull of large quality cantilever spiral oar and the reasonable medium factor in school, all can make marine shafting be in the state of a deflection running.In early days, hull is less, and the power that required screw propeller provides is little, and ship stern rigidity is enough large for axle is, above factor can be ignored.And along with boats and ships to maximize, the high speed future development, ship power also towards at a high speed, light-duty and carry by force future development, the impact of screw propeller cantilever quality can not be ignored again, and ship stern rigidity and axis rigidity are on magnitude, therefore it is very necessary axle being tied up to that the variation that produces the vibration characteristics after deflection analyzes, and very significant.
All there are strict requirements to the whirling vibration of marine shafting in each large classification society.Whirling vibration of shafting is that transverse vibration is different from axle.The former is that axle ties up in rotary course due to revolution and rotation disalignment, and the axle that gyroscopic couple causes is flexural vibrations, is that axle is dynamic vibration characteristics; The latter is the flexural vibrations of axle system when not rotating of axle system.
Through literature search, find to only have 1 piece of periodical literature and 1 scientific and technological achievement that it is studied.Be respectively: the scientific and technological achievement " marine shafting vibration analysis and Research on Fault Diagnosis Technology " that " curved axis is the transverse vibration analytic method " that " noise and vibration control " stepped at the 6th periodical in 2010 and Harbin Engineering University and Heilongjiang Institute of Technology obtain in Dec, 2009 cooperation.Periodical literature " curved axis is the transverse vibration analytic method " utilizes finite element software ANSYS to set up respectively normal axis system and curved axis is the computation model of transverse vibration, and the natural frequency variation that axle is is analyzed.By numerical simulation, the research axle is in situation about bending, the impact of the flexural deformation that axle is on natural frequency.The size of finding the deflection natural frequency of shafting is less than the natural frequency that normal axis is, and obviously reduces along with the rising of vibration exponent number.This document has only considered that axle is deflection, and there is no to consider the impact after the rotation of axle system is got up, and namely its transverse vibration of having considered curved axis system changes, and does not carry out variation (the being whirling vibration) analysis that axle ties up to gyroscopic couple in rotation process.Scientific and technological achievement " curved axis is the transverse vibration analytic method " has proposed analytic model and the finite element body unit modeling method of curved axis system, having disclosed curved axis is that the horizontal natural frequency compared with normal axle that shakes is the rule that descends, and having solved curved axis is the technical barrier of vibration analysis.And delivered document and scientific and technological achievement and all analyzed the deflection shafting vibration from point of theory, lacked experimental study.
Summary of the invention
The purpose of this utility model is to provide to be studied deflection from experimental viewpoint a kind of deflection that affects rule of whirling vibration of shafting is affected the experimental provision of rule quantitative test on whirling vibration of shafting.
The purpose of this utility model is achieved in that
a kind of deflection of the utility model affects the experimental provision of rule quantitative test on whirling vibration of shafting, it is characterized in that: comprise shaft part, motor, pedestal, bearing assembly, flywheel assembly, motor connects the bottom of shaft part, shaft part connects pedestal by bearing assembly, and flywheel assembly is arranged on the top of shaft part, described bearing assembly comprises self-aligning bearing, bearing shell, pin, shaft part passes bearing shell, self-aligning bearing is positioned in bearing shell, be arranged on shaft part and support shaft part, the two ends of pin are connection bearing shell and middle connecting plate respectively, screw rod is arranged on middle connecting plate and connecting pin, nut is arranged on screw rod, thereby setting nut is regulated self-aligning bearing and is made shaft part generation elasticity or plastic yield, the bearing assembly lower end is installed and is connected the floor and connect pedestal by connecting the floor, connect installing force sensor between floor and bearing assembly, acceleration transducer and current vortex sensor are installed on bearing shell, current vortex sensor is in the face of the axle head setting.
The utility model can also comprise:
1, described flywheel assembly comprises flywheel and conical sleeve, and flywheel sleeve is in the conical sleeve outside, and conical sleeve is fixed on shaft part, and fixed block is set on conical sleeve, and flywheel is axially adjustable on conical sleeve, and fixed block is fixed flywheel.
2, the mass ratio of described flywheel and shaft part is 0.8 ~ 1.5, the ratio of inertias of the equivalent radius of flywheel and shaft part radius is 6.5 ± 0.5, shaft part length and shaft part radius ratio are: be 200 ± 5 when Speed of Reaction Wheels is not more than 200 rev/mins, be 100 ± 5 when Speed of Reaction Wheels is not less than 1000 rev/mins, all the other are 150 ± 5.
3, described shaft part comprises the axle more than two, links together by box coupling between axle and axle.
4, also comprise the front bearing assembly, the front bearing assembly is identical with bearing component construction and connect shaft part and pedestal, and front bearing assembly and bearing assembly lay respectively at the diverse location of shaft part.
Advantage of the present utility model is: the utility model can reflect the characteristic that real ship axle is really, can study deflection to the impact of whirling vibration of shafting characteristic from experimental viewpoint, and disclosing it affects rule.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is bearing component construction schematic diagram of the present utility model;
Fig. 3 is flywheel structure schematic diagram of the present utility model.
Embodiment
For example the utility model is described in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1～3, the utility model device mainly comprises: motor 1, T-slot pedestal 2, oldham coupling 3, front bearing assembly 4, box coupling assembly 5, rear bearing assembly 6, and flywheel assembly 7.This device is in order to study the deflection of axle system own to the impact of its vibration characteristics, and what reduce to bring due to bearing and deformation of the oil film thereof is the impact of deflection on axle, adopts self-aligning ball bearing to support shaft part.By utilizing serrated nut 11, the rear bearing schematic diagram is regulated self-aligning ball bearing 16 position in the vertical direction, can make shaft part produce elasticity, even when plastic yield, its axis of rotation position is not changed.Adopt self-aligning bearing 16 to support shaft part, bearings is good afterwards can to guarantee the shaft part run-off the straight.Connect by pin and bearing shell 14 is connected with middle connecting plate and middle connecting plate 13 connections, can guarantee that bearing shell 14 does not produce bending stress when axial displacement occurs self-aligning bearing 16.Utilize power sensor 9 to measure self-aligning bearing in the transmission power of deflection front and back bearings to pedestal, utilize acceleration transducer 17 to measure its vibratory response, utilize current vortex sensor 18 to measure the whirling vibration response of axle system.Rear bearing structure also comprises connecting bottom board 8, closely-pitched screw rod 10, and bearing (ball) cover 15.Flywheel adopts conical sleeve to be connected with shaft part, can regulate its axial location, and analyzing large mass flywheel cantilever amount difference is the impact of deflection and vibration characteristics thereof on axle, and wherein 19 is conical sleeve, and 20 is flywheel.
Be flywheel 20 with the quality of whole shaft part than the ratio of inertias similar Design of similar Design, screw propeller equivalent radius and the main radius of shaft part and the length-diameter ratio similar Design of shaft part length and the main radius of shaft part by screw propeller, the position of bearings is set at last realizes the dynamic similarity of axle system, make this device embody to greatest extent the characteristic of marine shafting.The real ship screw propeller that statistics obtains and the mass ratio of shaft part are in 0.8 ~ 1.5 left and right, the ratio of inertias of screw propeller equivalent radius and shaft part radius is 6.5 ± 0.5, shaft part length is relevant with shaft part radius ratio and Ship Types, high-speed craft (being that Speed of Reaction Wheels is not less than 1000 rev/mins) is relatively low, 100 ± 5, all the other are generally 150 ± 5, and special low powered (being that Speed of Reaction Wheels is not more than 200 rev/mins) is that this device is positioned at 150 left and right more than or equal to 200.And pass through to adjust the dynamics first rank natural frequency of bearing axial location realization at 11 ~ 15Hz.The buncher rotating speed can drive this device and stride across its first rank natural frequency between 150 ~ 3000r/min.
This device when mounted will be through meticulous vertical and horizontal direction position aligning, the self-aligning bearing axle center is on a level and vertical plane, the state before the assurance device deflection.
At first making axle is to get into smooth, the vibratory response that utilizes acceleration transducer 17 to measure self-aligning bearing, utilize current vortex sensor 18 to measure the whirling vibration response of axle system, utilize power sensor 9 to measure bearing to the dynamic transmission power of pedestal, find out the vibration characteristics before axle ties up to deflection, axle is that the analysis of deflection porpoise Character Comparison is prepared.
Afterwards, can regulate respectively serrated nut 11 and conical sleeve 19, realization due to rear bearing after the self-aligning bearing vertical position change and tie up to because the lengthening of large mass flywheel cantilever makes axle the deflection that the rear bearing place produces vertical 0.1mm ~ 1mm, measure 3 amounts that vibration is relevant above-mentioned, analysis axis system produces the deflection variation of its whirling vibration response characteristic afterwards, and the quantitative examination deflection is on the rule that affects of whirling vibration of shafting.
Claims (6)
1. a deflection affects the experimental provision of rule quantitative test on whirling vibration of shafting, it is characterized in that: comprise shaft part, motor, pedestal, bearing assembly, flywheel assembly, motor connects the bottom of shaft part, and shaft part connects pedestal by bearing assembly, and flywheel assembly is arranged on the top of shaft part, described bearing assembly comprises self-aligning bearing, bearing shell, pin, shaft part passes bearing shell, self-aligning bearing is positioned in bearing shell, be arranged on shaft part and support shaft part, the two ends of pin are connection bearing shell and middle connecting plate respectively, screw rod is arranged on middle connecting plate and connecting pin, nut is arranged on screw rod, thereby setting nut is regulated self-aligning bearing and is made shaft part generation elasticity or plastic yield, the bearing assembly lower end is installed and is connected the floor and connect pedestal by connecting the floor, connect installing force sensor between floor and bearing assembly, acceleration transducer and current vortex sensor are installed on bearing shell, current vortex sensor is in the face of the axle head setting.
2. a kind of deflection according to claim 1 affects the experimental provision of rule quantitative test on whirling vibration of shafting, it is characterized in that: described flywheel assembly comprises flywheel and conical sleeve, flywheel sleeve is in the conical sleeve outside, conical sleeve is fixed on shaft part, fixed block is set on conical sleeve, flywheel is axially adjustable on conical sleeve, and fixed block is fixed flywheel.
3. a kind of deflection according to claim 2 affects the experimental provision of rule quantitative test on whirling vibration of shafting, it is characterized in that: the mass ratio of described flywheel and shaft part is 0.8 ~ 1.5, the ratio of inertias of the equivalent radius of flywheel and shaft part radius is 6.5 ± 0.5, shaft part length and shaft part radius ratio are: be more than or equal to 200 when Speed of Reaction Wheels is not more than 200 rev/mins, be 100 ± 5 when Speed of Reaction Wheels is not less than 1000 rev/mins, all the other are 150 ± 5.
4. according to claim 1-3 arbitrary described a kind of deflections affect the experimental provision of rule quantitative test on whirling vibration of shafting, and it is characterized in that: described shaft part comprises the axle more than two, links together by box coupling between axle and axle.
5. according to claim 1-3 arbitrary described a kind of deflections affect the experimental provision of rule quantitative test on whirling vibration of shafting, it is characterized in that: also comprise the front bearing assembly, the front bearing assembly is identical with bearing component construction and connect shaft part and pedestal, and front bearing assembly and bearing assembly lay respectively at the diverse location of shaft part.
6. a kind of deflection according to claim 4 affects the experimental provision of rule quantitative test on whirling vibration of shafting, it is characterized in that: also comprise the front bearing assembly, the front bearing assembly is identical with bearing component construction and connect shaft part and pedestal, and front bearing assembly and bearing assembly lay respectively at the diverse location of shaft part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220525288 CN202974424U (en) | 2012-10-15 | 2012-10-15 | Experiment device for quantitatively analyzing the influence of flexure on whirling vibration of shafting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220525288 CN202974424U (en) | 2012-10-15 | 2012-10-15 | Experiment device for quantitatively analyzing the influence of flexure on whirling vibration of shafting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202974424U true CN202974424U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220525288 Withdrawn - After Issue CN202974424U (en) | 2012-10-15 | 2012-10-15 | Experiment device for quantitatively analyzing the influence of flexure on whirling vibration of shafting |
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| CN (1) | CN202974424U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914363A (en) * | 2012-10-15 | 2013-02-06 | 哈尔滨工程大学 | Experimental device for quantitative analysis of influence rule of bending on shaft rotation vibration |
-
2012
- 2012-10-15 CN CN 201220525288 patent/CN202974424U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914363A (en) * | 2012-10-15 | 2013-02-06 | 哈尔滨工程大学 | Experimental device for quantitative analysis of influence rule of bending on shaft rotation vibration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20140129 |
|
| RGAV | Abandon patent right to avoid regrant |