CN203856904U - Rotating speed self-monitoring ball bearing for wind-driven generator - Google Patents
Rotating speed self-monitoring ball bearing for wind-driven generator Download PDFInfo
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- CN203856904U CN203856904U CN201420281078.0U CN201420281078U CN203856904U CN 203856904 U CN203856904 U CN 203856904U CN 201420281078 U CN201420281078 U CN 201420281078U CN 203856904 U CN203856904 U CN 203856904U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 230000005284 excitation Effects 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 abstract 2
- 238000010248 power generation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model relates to a rotating speed self-monitoring ball bearing for a wind-driven generator, belonging to the technical field of bearings. An installing barrel and an excitation disc are fixed at the end parts of an outer ring and an inner ring respectively; a circuit board and a baffle ring are arranged on the installing barrel; a seal ring is arranged between the baffle ring and the excitation disc; a metal film is connected between the baffle ring and the installing barrel in a pressing manner; a piezoelectric film is glued on a cantilever beam of the metal film to form a transducer; an excited magnet I is arranged at the free end of the transducer; a pressing plate is fixed on a lug boss on the installing barrel; a dish-shaped spring, an excited magnet II and a piezoelectric body are connected in a blind hole in the lug boss in a pressing manner; the transducer and the piezoelectric body are connected with a circuit board through lead groups I and II; exciting magnets I and II are arranged on the excitation disc; magnetic poles with the same polarity of the exciting magnets and the excited magnets are arranged closely. The rotating speed self-monitoring ball bearing for the wind-driven generator has the advantage that the structure is novel, a rotating speed self-monitoring function is realized, and the ball can be used as an independent standard part without changing the structure of the installing device; the configuration parameters of the transducer structure and the exciting magnets are reasonably determined; the power generation and supply capability is strong and the reliability is high.
Description
Technical field
The utility model belongs to technical field of bearings, is specifically related to the ball bearing of a kind of rotating speed for wind-driven generator from monitoring.
Background technique
Bearing is a kind of typical mechanical basic part, has application extremely widely in fields such as machinery, vehicle, Aero-Space, steamer and the energy; But bearing is also one of the most flimsy part in rotary machine, 30% of rotating machinery fault is to be caused by bearing failure.Therefore, the status monitoring of bearing and Incipient Fault Diagnosis have caused people's great attention.The on-line monitoring of bearing state has progressively become the indispensable technology in field such as large-scale wind driven generator, steamer, high ferro and aircraft, and the index of required monitoring comprises such as temperature, vibration, rotating speed and noise etc.Early stage bearing monitoring system is mainly external hanging type, and one of its drawback is distant between sensor and signal source, belongs to non-contacting indirect measurement, therefore error is larger.In recent years, people have proposed again multi-form Embedded Monitoring System in succession, this method can solve measuring accuracy and accuracy problem, but need to change structure or its integrity of relevant device, so that installation sensing and monitoring system, the problems such as this not only easily causes that the stress of equipment component is concentrated also cannot realize on the equipment of some complex structures or limited space; The most key, in the time that monitoring system need to be rotated with bearing inner race or outer ring, inconvenience is by line powered, and employing powered battery is very short service time.Therefore, current bearing monitoring system is all also non real-time, non-contact measurement indirectly substantially, is difficult to obtain timely and accurately the running state of bearing.
Summary of the invention
The utility model provides the ball bearing of a kind of rotating speed for wind-driven generator from monitoring, to solve the existing bearing monitoring system existing problem that is difficult to the running state that obtains timely and accurately bearing in actual applications.
The technological scheme that the utility model is taked is: inner ring and outer ring are rotationally connected by the ball on pearl frame, and described outer ring width is greater than inner race width, and a side alignment of Internal and external cycle is installed; In a side of Internal and external cycle non-alignment, the outer rim flange of mounting cylinder is fixed by screws in cycle surface, and the locating slot on excitation dish is enclosed within inner ring end and is fixed by screw; Mounting cylinder diapire is provided with fan shaped borehole, boss and barrel, and boss is provided with blind hole; Circuit board is arranged on the fan shaped borehole place on mounting cylinder diapire by screw; The barrel of baffle ring is connected by screw with the barrel of mounting cylinder, between the diapire of baffle ring and excitation dish, is provided with seal ring; Between the end face of the end face of the barrel of baffle ring and the barrel of mounting cylinder, be crimped with the metallic film that is provided with fan-shaped overhang, a side away from inner ring on overhang is stained with piezoelectric film, piezoelectric film after bonding and metallic film overhang form transducer, and transducer free end is provided with excited magnet one by screw; Pressing plate is fixed by screws on the boss of mounting cylinder, and successively belleville spring, excited magnet two and piezoelectrics is crimped in the blind hole on boss; Described transducer and piezoelectrics are connected with circuit board with two by wire group one respectively; The magnet ring of exciting magnet one and magnetic post are embedded into respectively in the annular groove and through hole of excitation dish, and the magnetic post of exciting magnet one equates respectively with the radius of excited magnet one and apart from the distance at inner ring center; Exciting magnet two is embedded in the blind hole of excitation dish, and exciting magnet two and the radius of excited magnet two and the throw of eccentric apart from the center of inner ring equate respectively; Like pole between exciting magnet one and excited magnet one and between exciting magnet two and excited magnet two is near installing, and the axial pole configuration mode of described each exciting magnet is identical.
A kind of mode of execution of the utility model is: the value of the quantity n of exciting magnet one upper magnetic post should meet following formula,
wherein R Wei Cizhu center is to the distance of bearing gyration center, and r is the radius of magnetic post.
A kind of mode of execution of the utility model is: the working portion of described transducer is isosceles trapezoid, and the elongation line of described trapezoidal two hypotenuses meets at excited magnet Yi center, and the quantity m of trapezoidal two hypotenuse angle Q5 and transducer is respectively:
Wherein L is the distance of transducer fixed end drift angle distance between bearing gyration center, and z is the diameter of wire electrode while adopting line cutting process.
The utility model has the advantages that novel structure, bearing self has the self-monitoring function of rotating speed, as independently standarized component use, without the structure that changes its erection unit, can realize real time on-line monitoring truly; Transducer architecture and exciting magnet configuration parameter are determined rationally, are sent out power supply capacity strong; In transducer work, only bear action of compressive stress, reliability is high.
Brief description of the drawings
Fig. 1 is the section of structure of preferred embodiment medium speed of the utility model from the ball bearing of monitoring;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the B-B view of Fig. 1;
Fig. 4 is the I portion enlarged view of Fig. 1;
Fig. 5 is the structural representation of the utility model metallic film, piezoelectric film and bonding rear formed transducer thereof;
Fig. 6 is the structure sectional view of the utility model excitation dish;
Fig. 7 is the left view of Fig. 6;
Fig. 8 is the structure sectional view of the utility model exciting magnet one;
Fig. 9 is the right elevation of Fig. 8;
Figure 10 be different determine angle than time excited magnet suffered active force and corner ratio relation curve;
Figure 11 is energetic coefficient and maximum, force width and the relation curve of determining angle ratio.
Embodiment
As shown in Fig. 1～Fig. 9, comprising: inner ring 1, pearl frame 2, ball 3, outer ring 4, baffle ring 5, mounting cylinder 6, circuit board 7, piezoelectric film 8, metallic film 9, excited magnet 1, piezoelectrics 12, excited magnet 2 13, excitation dish 14, exciting magnet 1 and exciting magnet 2 17.
Inner ring 1 is rotationally connected by the ball 3 on pearl frame 2 with outer ring 4, and outer ring 4 width are greater than the width of inner ring 1, and described inner ring 1 installation of aliging with a side of outer ring 4; A side in described outer ring 4 with inner ring 1 non-alignment, the outer rim flange 61 of mounting cylinder 6 is fixed by screws in the end face of outer ring 4, locating slot 141 on excitation dish 14 is enclosed within the end face of inner ring 1 and is fixed by screw, the diapire of mounting cylinder 6 is provided with fan shaped borehole 62, boss 63 and barrel 65, described boss 63 is provided with blind hole 64, circuit board 7 is arranged on fan shaped borehole 62 places on mounting cylinder 6 diapires by screw, the barrel 52 of baffle ring 5 is connected by screw with the barrel 65 of mounting cylinder 6, between the diapire 51 of baffle ring 5 and excitation dish 14, is provided with seal ring 15; Between the end face of the end face of the barrel 52 of baffle ring 5 and the barrel 65 of mounting cylinder 6, be crimped with the metallic film 9 of fan-shaped overhang 91, a side bonds away from inner ring 1 on overhang 91 has piezoelectric film 8, piezoelectric film 8 and overhang 91 after bonding form transducer 10, and the free end of transducer 10 is provided with excited magnet 1 by screw; Pressing plate 19 is fixed by screws on the boss 63 of mounting cylinder 6, and successively belleville spring 18, excited magnet 2 13 and piezoelectrics 12 is crimped in the blind hole 64 on boss 63; Described transducer 10 and piezoelectrics 12 are connected with circuit board 7 with wire group two L2 by wire group one L1 respectively; The magnet ring 161 of exciting magnet 1 and magnetic post 162 are embedded into respectively in the annular groove 142 and through hole 143 of excitation dish 14, and the magnetic post 162 of exciting magnet 1 equates respectively with the radius of excited magnet 1 and apart from the distance at inner ring 1 center; Exciting magnet 2 17 is embedded in the blind hole 144 of excitation dish 14, and exciting magnet 2 17 and the radius of excited magnet 2 13 and the throw of eccentric apart from the center of inner ring 1 equate respectively; Like pole between exciting magnet 1 and excited magnet 1 and between exciting magnet 2 17 and excited magnet 2 13 is near installing, and described exciting magnet 1 is identical with the axial pole configuration mode of exciting magnet 2 17.
In working procedure, in the time that inner ring 1 and outer ring 4 relatively rotate, exciting magnet 1 on excitation dish 14 produces relative rotation with the excited magnet 1 of transducer 10 ends, thereby make the area of overlap between magnetic post 162 and the excited magnet 1 on exciting magnet 1 alternately increase and reduce, therefore axial force therebetween alternately increases and reduces, force transducer 10 to produce axial bending vibration, and mechanical energy is changed into electric energy, and flow to the power circuit on circuit board 7 through wire group one L1; In the time that inner ring 1 and outer ring 4 relatively rotate, exciting magnet 2 17 also produces relative rotation with excited magnet 2 13, axial force also alternately increases and reduces therebetween, thereby make piezoelectrics 12 bear alternation axial pressure and produce voltage signal, the voltage signal generating reaches the power circuit on circuit board 7 through wire group two L2; While relatively rotating one week due to inner ring 1 and outer ring 4, piezoelectrics 12 are only excited once and only to generate a voltage pulse, and therefore in the unit time, piezoelectrics 12 produce pulsed voltage quantity and be the relative rotation speed of bearing inner race 1 and outer ring 4.
In above-mentioned inner ring 1 and outer ring 4 in relative rotation in process, excited magnet 1 is the repulsive interaction of excited target magnet 1 all the time, but repulsive force varies in size: the complete repulsive force maximum when overlapping of excited magnet 1 and magnetic post 162 on exciting magnet 1, excited magnet 1 is repulsive force minimum in the time of two adjacent magnetic post 162 neutral positions, therefore what the piezoelectric film 8 when inner ring 1 relatively rotates with outer ring 4 in transducer 10 bore is the pressure stress of alternation, thereby avoid bearing excessive tensile stress and damage, reliability is high.
The output voltage V that in the utility model, the excitation force F when other condition is determined is large, improve transducer 10
gand generated energy E
g, the value of the quantity n of exciting magnet one 16 upper magnetic posts 162 should meet following formula,
wherein R is the distance of magnetic Zhu162 center to bearing gyration center, and r is the radius of magnetic post 162.
By guarantee electric energy that transducer 10 produces can meet piezoelectrics 12 processing and the transmission demand of generation signal, when other conditions are determined, should improve as far as possible voltage and the electric energy that transducer 10 produces.When exciting magnet 1 relatively rotates one week with excited magnet 1, the electric energy that single transducer 10 produces is:
wherein C
ffor the free capacitance of piezoelectric film 8, V
g=η F is the off load voltage that transducer 10 generates, and η is the coefficient relevant with piezoelectric film 8 yardsticks and material, h=nF
2be called energetic coefficient, n is the quantity of exciting magnet one 16 upper magnetic posts 162.Obviously,, in the time that other condition is determined, can improve voltage and electric energy by improving directed force F; In addition, the quantity n of magnetic post 162 encourages number of times and active force amplitude size two aspects to affect the characteristic of transducer 10 by change.According to the utility model rotating speed, from the working principle of the ball bearing of monitoring and the actual conditions that magnetic field is space distribution, arbitrary excited magnet 1 is acted on by multiple magnetic posts 162 all simultaneously, and the size of active force depends on determines angle ratio
wherein
for two of magnetic post 162 angles between the crossing tangent line in bearing gyration center place, Q2=2 π/n is the angle between the line of two adjacent magnetic Zhu162 centers and bearing gyration center, can will determine angle than the function that converts magnetic post 162 quantity to, thus
wherein R is the distances of Ci Zhu 162 centers to bearing gyration center, and r is the radius of magnetic post 162.Further research shows, in the time that exciting magnet 1 and excited magnet 1 relatively rotate, exists the different best angles of determining to make voltage or electric energy maximum than k, and in the time getting k=1.5～3, the quantitative range of exciting magnet one 16 upper magnetic posts 162 is
time, the electric energy obtaining and voltage are all larger, wherein energetic coefficient be not less than its peaked 1/2.
Figure 10 provided different determine angle than time excited magnet 1 suffered active force amplitude F with corner than the test curve of j=Q3/Q1, wherein Q3 is the angle between the line of excited magnet 1 and magnetic post 162 and bearing gyration center, is the angle between excited magnet 1 and magnetic post 162 therefore corner characterizes than j.Figure 10 explanation, determine angle when different, suffered exciting magnet one 16 active forces of excited magnet 1 big or small and the number of times difference encouraging.The maximum value of active force amplitude and energetic coefficient with determine angle than the relation curve of k as shown in figure 11, obviously, in the time getting k=1.5～3, gained voltage and electric energy are all larger, energetic coefficient be greater than its peaked 1/2.
In the utility model, for improving reliability and the generating capacity of transducer 10, the working portion of described transducer 10, L0 place is isosceles trapezoid, and the elongation line of described trapezoidal two hypotenuses meets at excited magnet Yi11 center, and the quantity m of trapezoidal two hypotenuse angle Q5 and transducer 10 is respectively:
wherein L is the distance of transducer 10 fixed end drift angle distance between bearing gyration center, and z is the diameter of wire electrode while adopting line cutting process.
According to mechanics of materials knowledge, overhang free end is subject to external force F to do the used time, the flexural stress σ that is x place apart from free end distance
mwith the width b of beam and the pass of thickness H be:
and the formation voltage V of transducer 10
gwith stress σ
mbe directly proportional.If the each cross-sectional width b of transducer 10 and thickness H equate respectively, its fixed end stress and formation voltage maximum and free end stress and formation voltage are zero, therefore for improving the output voltage of described transducer, the flexural stress that reduces fixed end, raising reliability, in the utility model, the active section L0 place of transducer 10 is isosceles trapezoid; For improving effective work area of transducer 10, the spacing that the free end of two adjacent transducer 10 is installed the semi-circle at excited magnet one 11 places is the wire electrode diameter z while adopting line cutting process.Therefore can further be tried to achieve by trigonometric function knowledge:
wherein Q4=2arcsin[(r+z/2)/R] be the angle between transducer 10 fixed end two summits and bearing gyration center line.
Claims (1)
1. for a rotating speed ball bearing for monitoring certainly for wind-driven generator, it is characterized in that: inner ring and outer ring are rotationally connected by the ball on pearl frame, described outer ring width is greater than inner race width, and a side alignment of Internal and external cycle is installed; In a side of Internal and external cycle non-alignment, the outer rim flange of mounting cylinder is fixed by screws in cycle surface, and the locating slot on excitation dish is enclosed within inner ring end and is fixed by screw; Mounting cylinder diapire is provided with fan shaped borehole, boss and barrel, and boss is provided with blind hole; Circuit board is arranged on the fan shaped borehole place on mounting cylinder diapire by screw; The barrel of baffle ring is connected by screw with the barrel of mounting cylinder, between the diapire of baffle ring and excitation dish, is provided with seal ring; Between the end face of the end face of the barrel of baffle ring and the barrel of mounting cylinder, be crimped with the metallic film that is provided with fan-shaped overhang, a side away from inner ring on overhang is stained with piezoelectric film, piezoelectric film after bonding and metallic film overhang form transducer, and transducer free end is provided with excited magnet one by screw; Pressing plate is fixed by screws on the boss of mounting cylinder, and successively belleville spring, excited magnet two and piezoelectrics is crimped in the blind hole on boss; Described transducer and piezoelectrics are connected with circuit board with two by wire group one respectively; The magnet ring of exciting magnet one and magnetic post are embedded into respectively in the annular groove and through hole of excitation dish, and the magnetic post of exciting magnet one equates respectively with the radius of excited magnet one and apart from the distance at inner ring center; Exciting magnet two is embedded in the blind hole of excitation dish, and exciting magnet two and the radius of excited magnet two and the throw of eccentric apart from the center of inner ring equate respectively; Like pole between exciting magnet one and excited magnet one and between exciting magnet two and excited magnet two is near installing, and the axial pole configuration mode of described each exciting magnet is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420281078.0U CN203856904U (en) | 2014-05-28 | 2014-05-28 | Rotating speed self-monitoring ball bearing for wind-driven generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420281078.0U CN203856904U (en) | 2014-05-28 | 2014-05-28 | Rotating speed self-monitoring ball bearing for wind-driven generator |
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| CN203856904U true CN203856904U (en) | 2014-10-01 |
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| CN201420281078.0U Expired - Lifetime CN203856904U (en) | 2014-05-28 | 2014-05-28 | Rotating speed self-monitoring ball bearing for wind-driven generator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982556A (en) * | 2014-05-28 | 2014-08-13 | 浙江师范大学 | Rotating speed self-monitoring type ball bearing for wind driven generator |
| CN113686579A (en) * | 2021-08-24 | 2021-11-23 | 重庆大学 | Double-row tapered roller bearing capable of self-monitoring torsional vibration and torsional vibration monitoring method |
| US11539317B2 (en) | 2021-04-05 | 2022-12-27 | General Electric Renovables Espana, S.L. | System and method for detecting degradation in wind turbine generator bearings |
-
2014
- 2014-05-28 CN CN201420281078.0U patent/CN203856904U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982556A (en) * | 2014-05-28 | 2014-08-13 | 浙江师范大学 | Rotating speed self-monitoring type ball bearing for wind driven generator |
| US11539317B2 (en) | 2021-04-05 | 2022-12-27 | General Electric Renovables Espana, S.L. | System and method for detecting degradation in wind turbine generator bearings |
| CN113686579A (en) * | 2021-08-24 | 2021-11-23 | 重庆大学 | Double-row tapered roller bearing capable of self-monitoring torsional vibration and torsional vibration monitoring method |
| CN113686579B (en) * | 2021-08-24 | 2024-01-30 | 重庆大学 | Double-row tapered roller bearing with self-monitoring torsional vibration and torsional vibration monitoring method |
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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: 20141001 Effective date of abandoning: 20160504 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |