CN203856888U - Self-monitoring tapered roller bearing of generator - Google Patents
Self-monitoring tapered roller bearing of generator Download PDFInfo
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- CN203856888U CN203856888U CN201420281121.3U CN201420281121U CN203856888U CN 203856888 U CN203856888 U CN 203856888U CN 201420281121 U CN201420281121 U CN 201420281121U CN 203856888 U CN203856888 U CN 203856888U
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- clamping plate
- right clamping
- magnet
- left clamping
- hole
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Abstract
The utility model relates to a self-monitoring tapered roller bearing of a generator, belonging to the technical field of bearings. An excitation disc in which excitation magnets I and II are embedded is arranged on an outer ring; a right clamping board is arranged on the inner ring; a thermocouple, a circuit board and a left clamping board are arranged on the right clamping board; a metal film is pressed between the left and right clamping boards; a piezoelectric film is glued on the metal film to form an energy harvester; an excited magnet I is arranged on the energy harvester and is arranged in a guide hole in the left clamping board; a pressing board is used for pressing a dish-shaped spring, an excited magnet II and a piezoelectric body for measuring rotation speed in a blind hole in the left clamping board; the piezoelectric body, the energy harvester and the thermocouple are connected through a lead group and the circuit board respectively. The self-monitoring tapered roller bearing of the generator has the advantages and characteristics that a self-energizing sensing and monitoring function is realized and real-time online monitoring can be realized in truth sense without changing the structure of the installing structure; the configuration parameters of the structure of the energy harvester and the excitation magnets are reasonably determined; the power generation and supply capability is strong; the guide hole is used for preventing the excitation magnets from torsional pendulum, so that the reliability of the energy harvester is improved.
Description
Technical field
The utility model belongs to bearing monitoring technical field, is specifically related to a kind of generator tapered roller bearing 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 high-rating 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 a kind of generator tapered roller bearing from monitoring, be all also non real-time, non-contact measurement indirectly to solve existing bearing monitoring system existing in actual applications, be difficult to the problem of the running state that obtains timely and accurately bearing.
The technological scheme that the utility model is taked is: comprise inner ring, cone, outer ring, described outer ring width is greater than the width of inner ring, and the endoporus of outer ring comprises conical bore and cylindrical hole two-part, the inner ring installation of aliging with outer ring one side, the end face of non-alignment one side outer ring is fixed with the flange of excitation dish by screw, and the cylindrical hole of the shaft shoulder coiling by excitation and outer ring location, on excitation dish, be inlaid with one and exciting magnet two of one group of exciting magnet, the end face of non-alignment one side inner ring is fixed with right clamping plate by screw, between the outer fringe surface of right clamping plate and the cylindrical hole of outer ring, be provided with seal ring, the endoporus interference fit of the shaft shoulder of right clamping plate and inner ring, right clamping plate are also fixed with left clamping plate by screw, between left clamping plate and right clamping plate, be crimped with endless metal film, right clamping plate are provided with one group of chamber A, the wire groove of shoulder hole and communicated cavity A and shoulder hole, on at least one chamber A diapire, thermocouple is installed, in shoulder hole, adopt screw that circuit board is installed, left clamping plate are provided with one group of chamber B, a blind hole, walk line three-way hole and the location shaft shoulder for one, bottom at described chamber B is also provided with pilot hole, left clamping plate are by the location shaft shoulder on it and the shoulder hole location and installation on right clamping plate, chamber B on left clamping plate equates with the chamber A radius on right clamping plate, metallic film surface in chamber A mono-side is bonded with piezoelectric film, piezoelectric film after bonding and metallic film form energy accumulator jointly, center at described energy accumulator is fixed with excited magnet one by screw, excited magnet one is placed in the pilot hole of left clamping plate, described excited magnet one equates respectively with the radius of exciting magnet one and apart from the distance at inner ring center, the axial pole configuration opposite direction of the exciting magnet one that described two circumferencial directions are adjacent, pressing plate is fixed by screws on left clamping plate, and successively by belleville spring, excited magnet two and piezoelectrics are crimped in the blind hole of left clamping plate, described excited magnet two and the radius of exciting magnet two and equate respectively apart from the distance at the center of inner ring, described piezoelectrics, energy accumulator and thermocouple are connected with circuit board by wire group one, wire group two and wire group three respectively.
A kind of mode of execution of the utility model: for improving the generating capacity of energy accumulator, the quantity n of exciting magnet one should meet following formula,
wherein r and R are respectively the radius of exciting magnet one and center thereof the distance to inner ring gyration center; Or determine angle than meeting
wherein Q1 is two of exciting magnet one angles between the crossing tangent line in bearing gyration center place, and Q2 is the angle between the line of two adjacent exciting magnet Yi centers and bearing gyration center.
A kind of mode of execution of the utility model: for improving the generating capacity of energy accumulator self, the material of metallic film and piezoelectric film is respectively beryllium bronze and PZT4, and piezoelectric film thickness and energy accumulator total thickness than the span of β be 0.5< β <0.7, piezoelectric film radius with right clamping plate on the span of ratio α of chamber A radius be 0.5< α <0.7.
A kind of mode of execution of the utility model: for improving the total generating capacity of energy accumulator, making each energy accumulator gross area sum maximum, between the clamping plate of left and right, the optimal number of energy accumulator is that n=4, optimum radius are r
0=0.4142 (R
0-H), wherein R
0for the interior pore radius of outer ring, the clamping amount that H is metallic film.
The utility model has the advantages that novel structure, bearing self has self energizing sensor monitoring function, as independently standarized component use, without the structure that changes its erection unit, can realize real time on-line monitoring truly; Energy accumulator structure and exciting magnet configuration parameter are determined rationally, are sent out power supply capacity strong; Adopt pilot hole to prevent that excited magnet from rocking, improve energy accumulator reliability.
Brief description of the drawings
Fig. 1 is the section of structure in preferred embodiment of the utility model;
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 left clamp region schematic diagram of the utility model;
Fig. 6 is the right clamp region schematic diagram of the utility model;
Fig. 7 be the utility model different determine angle than time excited magnet suffered active force and corner ratio relation curve;
Fig. 8 is the utility model drive factor, maximum force and the relation curve of determining angle ratio;
Fig. 9 is the utility model structural coefficient and the when graph of relation of radius ratio of thickness;
Figure 10 is the relation curve between the energy accumulator gross area and energy accumulator radius.
Embodiment
As shown in Fig. 1～Fig. 6, comprise inner ring 1, cone 2, outer ring 3, described outer ring 3 width are greater than the width of inner ring 1, and the endoporus of outer ring 3 comprises conical bore 31 and cylindrical hole 32 two-part, inner ring 1 installation of aliging with outer ring 3 one sides, the end face of non-alignment one side outer ring 3 is fixed with the flange 81 of excitation dish 8 by screw, and locate by the shaft shoulder 82 on excitation dish 8 and the cylindrical hole 32 of outer ring 3, on excitation dish 8, be inlaid with one group of exciting magnet 1 and an exciting magnet 2 17, the end face of non-alignment one side inner ring 1 is fixed with right clamping plate 5 by screw, between the cylindrical hole 32 of the outer fringe surface of right clamping plate 5 and outer ring 3, be provided with seal ring 18, the shaft shoulder 54 of right clamping plate 5 and the endoporus interference fit of inner ring 1, right clamping plate 5 are also fixed with left clamping plate 9 by screw, between left clamping plate 9 and right clamping plate 5, be crimped with endless metal film 7, right clamping plate 5 are provided with the wire groove 51 of one group of chamber A52, shoulder hole 53 and communicated cavity A52 and shoulder hole 53, on at least one chamber A52 diapire, thermocouple 4 is installed, in shoulder hole 53, adopts screw that circuit board 19 is installed, left clamping plate 9 be provided with one group of chamber B93, blind hole 91, one walk line three-way hole 92 and the location shaft shoulder 95, be also provided with pilot hole 94 in the bottom of described chamber B93, left clamping plate 9 are by shoulder hole 53 location and installation on the location shaft shoulder 95 and right clamping plate 5 on it, chamber B93 on left clamping plate 9 equates with the chamber A52 radius on right clamping plate 5, metallic film 7 surface bindeds in chamber A52 mono-side have piezoelectric film 6, the common formation energy accumulator 10 of piezoelectric film 6 after bonding and metallic film 7, center at described energy accumulator 10 is fixed with excited magnet 1 by screw, excited magnet 1 is placed in the pilot hole 94 of left clamping plate 9, described excited magnet 1 equates respectively with the radius of exciting magnet 1 and apart from the distance at inner ring 1 center, the axial pole configuration opposite direction of the exciting magnet 1 that described two circumferencial directions are adjacent, pressing plate 16 is fixed by screws on left clamping plate 9, and successively by belleville spring 15, excited magnet 2 14 and piezoelectrics 13 are crimped in the blind hole 91 of left clamping plate 9, described excited magnet 2 14 and the radius of exciting magnet 2 17 and equate respectively apart from the distance at the center of inner ring 1, described piezoelectrics 13, energy accumulator 10 and thermocouple 4 are connected with circuit board 19 with wire group three L3 by wire group one L1, wire group two L2 respectively.
In working procedure, in the time that inner ring 1 and outer ring 3 relatively rotate, between excited magnet 1 and exciting magnet 1 and between excited magnet 2 14 and exciting magnet 2 17, all produce relative rotation, and change the axial force between described excited magnet and described exciting magnet, thereby make energy accumulator 10 and the suffered axial force of piezoelectrics 13 alternately increase and reduce, thereby convert mechanical energy to electric energy: the electric energy that energy accumulator 10 produces is transferred to the power circuit on circuit board 19 through wire group L2, for processing and the transmitting of thermocouple 4 temperature signal that obtains and piezoelectrics 13 tach signal that obtains, in the utility model, when inner ring 1 and outer ring 3 relatively rotate one week, piezoelectrics 13 are only excited once and only to generate a voltage waveform, and therefore piezoelectrics 13 produce pulsed voltage quantity and be the relative rotation speed of bearing inner race 1 and outer ring 3 in the unit time.
In the utility model, for improving the generating capacity of energy accumulator 10, the quantity n of the exciting magnet 1 on excitation dish 8 should meet following formula,
wherein, r and R are respectively the radius of exciting magnet 1 and center thereof the distance to inner ring 1 gyration center; Or determine angle than meeting
wherein Q1 is two of exciting magnet 1 angles between the crossing tangent line in bearing gyration center place, and Q2 is the angle between the line of two adjacent exciting magnet Yi12 centers and bearing gyration center.
For guaranteeing that electric energy that energy accumulator 10 produces can satisfied temperature and processing and the mission need of tach signal, when determining, other condition should improve as far as possible voltage and the electric energy that energy accumulator 10 produces.When bearing inner race 1 and outer ring 3 relatively rotate one week, the electric energy that single energy accumulator 10 produces is:
wherein C
ffor the free capacitance of energy accumulator 10, V
g=η F is the off load voltage that energy accumulator 10 generates, and η is the voltage coefficient relevant with energy accumulator 10 yardsticks and material, h=nF
2be called drive factor, λ=C
fη
2/ 2 are called structural coefficient, and n is the quantity of exciting magnet 1.Obviously,, in the time that other condition is determined, can improve voltage and electric energy by the quantity n and the structural coefficient λ that improve directed force F, exciting magnet 1; Wherein, the quantity n of exciting magnet 1 encourages number of times and amount of force two aspects to affect the characteristic of energy accumulator 10 by change.The actual conditions that are space distribution from the generator of monitoring with working principle and the magnetic field of tapered roller bearing according to the utility model, arbitrary excited magnet 1 is all subject to the effect of multiple exciting magnets 1 simultaneously, and the size of active force depends on determines angle ratio
wherein
for two of exciting magnet 1 angles between the crossing tangent line in bearing gyration center place, Q2=2 π/n is the angle between the line of two adjacent exciting magnet Yi12 centers and bearing gyration center, can will determine angle than the function that converts exciting magnet one 12 quantity n to, thus
wherein r and R are respectively the radius of exciting magnet 1 and center thereof the distance to inner ring 1 gyration center.Further research shows, has different best voltage and the electric energy maximums that angle produces energy accumulator 10 than k of determining; In the time getting k=1～1.5, exciting magnet one 12 quantitative ranges are
time, the electric energy obtaining and voltage are all larger, wherein drive factor be not less than its peaked 1/2.
Fig. 7 provided different determine angle than time excited magnet 1 suffered directed force F with corner than the test curve of j=Q3/Q1, wherein Q3 is the corner at the relatively a certain exciting magnet Yi12 of excited magnet 1 center, thus corner than j characterize be the position relationship between excited magnet 1 and each exciting magnet 1.Fig. 7 explanation, determine angle when different, suffered exciting magnet one 12 active forces of excited magnet 1 big or small and the number of times difference encouraging.Active force maximum value and drive factor with determine angle than the relation curve of k as shown in Figure 8, obviously, in the time getting k=1.0～1.5, gained voltage and electric energy are all larger, drive factor be greater than its peaked 1/2.
In the utility model, for improving the generating capacity of energy accumulator 10 self, the material of metallic film 7 is beryllium bronze, the material of piezoelectric film 6 is PZT4, and piezoelectric film 6 thickness and the span of the Thickness Ratio β of energy accumulator 10 be 0.5< β <0.7, piezoelectric film 6 radiuses with right clamping plate 5 on the span of ratio α of radius of chamber A52 be 0.5< α <0.7.
The utility model adopts the energy accumulator 10 of circular piezoelectric film structure, when the radius of the chamber A52 of energy accumulator 10 thickness and right clamping plate 5 is given timing, excessive or the too small generating capacity that all can make of the thickness of piezoelectric film 6 and radius reduces, and in reality, existing best piezoelectric film thickness and energy accumulator total thickness to make the generated energy of energy accumulator 10 than the ratio α of the chamber A52 radius on β and piezoelectric film radius and right clamping plate is structural coefficient maximum.After the material parameter of metallic film 7 and piezoelectric film 6 is determined, can further try to achieve the relation of generated energy or structural coefficient λ and the ratio α of Thickness Ratio β and radius.The material of metallic film 7 of the present utility model is beryllium bronze, and the material of piezoelectric film 6 is PZT4, its structural coefficient and thickness when radius ratio relation as shown in Figure 9.According to Fig. 9, the utility model is 0.5< β <0.7,0.5< α <0.7 by the better parameter area of beryllium bronze and energy accumulator that PZT4 forms 10.
In the utility model, for improving the total generating capacity of each energy accumulator 10 between left clamping plate 9 and right clamping plate 5, should make each energy accumulator 10 gross area sum maximums, the optimal number that is now placed in the energy accumulator 10 between left clamping plate 9 and right clamping plate 5 is that n=2 π/Q=4, optimum radius are r
0=0.4142 (R
0-H), wherein Q=2arcsin[r
0/ (R
0-H)] be angle, the R between two tangent lines that intersect at inner ring center on energy accumulator 10
0for the interior pore radius of outer ring 3, the clamping amount that H is metallic film 7.
In the utility model, for improving the overall generating capacity of each energy accumulator 10, should make to be placed in the area sum maximum of each energy accumulator 10 between left clamping plate 9 and right clamping plate 5, should make
maximum, wherein n=2 π/Q is quantity, the r of described energy accumulator 10
0for energy accumulator 10 radiuses, Q=2arcsin[r
0/ (R
0-H)] be angle, the R between two tangent lines that intersect at inner ring center on energy accumulator 10
0for the interior pore radius of outer ring 3, the clamping amount that H is metallic film 7; According to the existence condition of maximum area A, i.e. dA/dr
0=0, try to achieve best energy accumulator 10 radiuses and quantity is respectively r by numerical method
0=0.4142 (R
0-H) and n=2 π/Q=4; Each energy accumulator 10 gross area A and r
0/ (R
0-H) relation as shown in figure 10.
Claims (1)
1. from a generator tapered roller bearing for monitoring, comprise inner ring, cone, outer ring, it is characterized in that: described outer ring width is greater than the width of inner ring, the endoporus of outer ring comprises conical bore and cylindrical hole two-part, the inner ring installation of aliging with outer ring one side, the end face of non-alignment one side outer ring is fixed with the flange of excitation dish by screw, and the cylindrical hole of the shaft shoulder coiling by excitation and outer ring location, on excitation dish, be inlaid with one and exciting magnet two of one group of exciting magnet, the end face of non-alignment one side inner ring is fixed with right clamping plate by screw, between the outer fringe surface of right clamping plate and the cylindrical hole of outer ring, be provided with seal ring, the endoporus interference fit of the shaft shoulder of right clamping plate and inner ring, right clamping plate are also fixed with left clamping plate by screw, between left clamping plate and right clamping plate, be crimped with endless metal film, right clamping plate are provided with one group of chamber A, the wire groove of shoulder hole and communicated cavity A and shoulder hole, on at least one chamber A diapire, thermocouple is installed, in shoulder hole, adopt screw that circuit board is installed, left clamping plate are provided with one group of chamber B, a blind hole, walk line three-way hole and the location shaft shoulder for one, bottom at described chamber B is also provided with pilot hole, left clamping plate are by the location shaft shoulder on it and the shoulder hole location and installation on right clamping plate, chamber B on left clamping plate equates with the chamber A radius on right clamping plate, metallic film surface in chamber A mono-side is bonded with piezoelectric film, piezoelectric film after bonding and metallic film form energy accumulator jointly, center at described energy accumulator is fixed with excited magnet one by screw, excited magnet one is placed in the pilot hole of left clamping plate, described excited magnet one equates respectively with the radius of exciting magnet one and apart from the distance at inner ring center, the axial pole configuration opposite direction of the exciting magnet one that described two circumferencial directions are adjacent, pressing plate is fixed by screws on left clamping plate, and successively by belleville spring, excited magnet two and piezoelectrics are crimped in the blind hole of left clamping plate, described excited magnet two and the radius of exciting magnet two and equate respectively apart from the distance at the center of inner ring, described piezoelectrics, energy accumulator and thermocouple are connected with circuit board by wire group one, wire group two and wire group three respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420281121.3U CN203856888U (en) | 2014-05-28 | 2014-05-28 | Self-monitoring tapered roller bearing of generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420281121.3U CN203856888U (en) | 2014-05-28 | 2014-05-28 | Self-monitoring tapered roller bearing of generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203856888U true CN203856888U (en) | 2014-10-01 |
Family
ID=51606741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420281121.3U Expired - Fee Related CN203856888U (en) | 2014-05-28 | 2014-05-28 | Self-monitoring tapered roller bearing of generator |
Country Status (1)
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|---|---|
| CN (1) | CN203856888U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982542A (en) * | 2014-05-28 | 2014-08-13 | 浙江师范大学 | Self-monitoring conical ball bearing for generator |
| CN104482041A (en) * | 2015-01-07 | 2015-04-01 | 浙江师范大学 | Large-scale self-monitoring conical roller bearing for generator |
| CN114123843A (en) * | 2021-11-26 | 2022-03-01 | 浙江师范大学 | Power supply device of vortex vibration type river monitoring system |
-
2014
- 2014-05-28 CN CN201420281121.3U patent/CN203856888U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982542A (en) * | 2014-05-28 | 2014-08-13 | 浙江师范大学 | Self-monitoring conical ball bearing for generator |
| CN104482041A (en) * | 2015-01-07 | 2015-04-01 | 浙江师范大学 | Large-scale self-monitoring conical roller bearing for generator |
| CN104482041B (en) * | 2015-01-07 | 2016-12-28 | 浙江师范大学 | A kind of electromotor large scale is from monitoring taper roll bearing |
| CN114123843A (en) * | 2021-11-26 | 2022-03-01 | 浙江师范大学 | Power supply device of vortex vibration type river monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20150528 |
|
| EXPY | Termination of patent right or utility model |