CN203856886U - High-speed cylindrical roller bearing with self-generating monitoring device - Google Patents
High-speed cylindrical roller bearing with self-generating monitoring device Download PDFInfo
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- CN203856886U CN203856886U CN201420283417.9U CN201420283417U CN203856886U CN 203856886 U CN203856886 U CN 203856886U CN 201420283417 U CN201420283417 U CN 201420283417U CN 203856886 U CN203856886 U CN 203856886U
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- energy harvester
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 6
- 230000005284 excitation Effects 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims 2
- 238000012544 monitoring process Methods 0.000 abstract description 17
- 238000010248 power generation Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 229910000906 Bronze Inorganic materials 0.000 description 4
- 229910052790 beryllium Inorganic materials 0.000 description 4
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical group [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 4
- 239000010974 bronze Substances 0.000 description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 240000008168 Ficus benjamina Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
本实用新型涉及一种带自发电监测装置的高速圆柱滚子轴承，属于轴承及其监测技术领域。两个保持架以及镶嵌于其内的激励磁铁通过铆钉铆接；置于保持架型腔内的圆柱体两端镶嵌有激励磁铁；内圈两端的阶梯轴上或外圈两端的阶梯孔内装有盘体，盘体的环槽侧壁上装有传感器，盘体两侧分别装有电路板和盖板，盘体与盖板间装有俘能器，俘能器中心铆接有受激磁铁，受激磁铁套在盘体的导向孔内；优点是具有自供能传感监测功能，无需改变安装设备的结构，可实现真正意义上的实时在线监测；俘能器结构及激励方案合理、通过导向孔防止俘能器扭摆、利用随圆锥体转动的激励磁铁激励，故可靠性高、发电量大、有效速带宽、且适于高转速场合。
The utility model relates to a high-speed cylindrical roller bearing with a self-generating monitoring device, which belongs to the technical field of bearings and monitoring thereof. The two cages and the excitation magnets embedded in them are riveted by rivets; the two ends of the cylinder placed in the cavity of the cage are embedded with excitation magnets; the stepped shafts at both ends of the inner ring or the stepped holes at both ends of the outer ring are equipped with discs. The body, the side wall of the ring groove of the disc body is equipped with a sensor, the two sides of the disc body are respectively equipped with a circuit board and a cover plate, an energy harvester is installed between the disc body and the cover plate, and an excited magnet is riveted in the center of the energy harvester. The magnet is set in the guide hole of the disk body; the advantage is that it has the function of self-powered sensing and monitoring, and real-time online monitoring can be realized without changing the structure of the installed equipment; the structure of the energy harvester and the excitation scheme are reasonable, and the guide hole prevents The torsion pendulum of the energy harvester is excited by the excitation magnet that rotates with the cone, so it has high reliability, large power generation, effective speed and wide bandwidth, and is suitable for high-speed occasions.
Description
Technical field
The utility model belongs to bearing and monitoring technical field thereof, is specifically related to a kind of High-Speed Cylindrical Roller Bearing and self power generation monitoring device thereof.
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.
For solving the powerup issue of the rotation monitoring systems such as bearing, people have proposed the rotary piezoelectric generating device of various ways, its principle is directly to utilize the mode of encouraging coupling by magnetic that relatively rotates between axle and bearing support to encourage piezoelectric vibrator vibrating power-generation, and the maximum drawback of this mode of operation generator is to be only applicable to more slow-revving situation; In the time that rotating speed is higher, between rotary magnet and piezoelectric vibrator end magnet overlapping time extremely short, piezoelectric vibrator is difficult to obtain enough kinetic energy makes its generation vibrate and generate electricity.
Summary of the invention
The utility model provides a kind of High-Speed Cylindrical Roller Bearing with self power generation monitoring device, existing in the time that rotating speed is higher in actual applications to solve existing bearing monitoring system, between rotary magnet and piezoelectric vibrator end magnet overlapping time extremely short, piezoelectric vibrator is difficult to obtain enough kinetic energy makes it produce vibration the problem such as generating.
The technological scheme that the utility model is taked is: comprise inner ring, cylindrical body, outer ring, retainer one and retainer two are provided with die cavity, shoulder hole and through hole, retainer one and retainer two and be embedded in retainer one and the shoulder hole of retainer two in exciting magnet pass through rivet, the cylindrical two ends that are placed in the die cavity of retainer one and retainer two are inlaid with exciting magnet, and the through hole of one end of described exciting magnet from retainer one and retainer two stretches out, the two ends of inner ring are provided with multidiameter shaft, the two ends of outer ring are provided with shoulder hole, on described multidiameter shaft or in shoulder hole, by interference fit, disk body is housed, the both sides of disk body are respectively equipped with heavy chamber and annular groove, diapire in the middle of heavy chamber and annular groove is provided with pilot hole and wire guide, sensor one and sensor two or sensor three and sensor four are installed on the sidewall of annular groove, circuit board and cover plate are arranged on the side that is provided with annular groove and heavy chamber on disk body by screw respectively, described cover plate is provided with heavy chamber, between cover plate and disk body, be crimped with metallic film, be placed on the metallic film at the heavy chamber of disk body and the heavy chamber place of cover plate and form energy accumulator by being bonded with piezoelectric film, the center riveted joint of energy accumulator has excited magnet, excited magnet is socketed in pilot hole, described excited magnet equates respectively with radius and the turning radius thereof of exciting magnet, the each energy accumulator and the sensor one that are placed on same disk body are connected with circuit board by different wire groups respectively with sensor four with sensor two or sensor three.
A kind of mode of execution of the utility model is, be placed in close installation of opposite pole of two exciting magnets of same shaft section, be placed in the axial arrangement opposite direction of the magnetic pole of adjacent exciting magnet on two circumference of same cross section, and the exciting magnet quantity n being placed on same shaft section should meet following formula,
wherein, r and R are respectively the radius of exciting magnet and the turning radius at center thereof; Or determine angle than meeting
wherein Q1 two angles between the crossing tangent line in bearing gyration center place that are exciting magnet, Q2 is the angle between the center of two adjacent exciting magnets and the line of its gyration center.
A kind of mode of execution of the utility model is, the material of metallic film is beryllium bronze, the material of piezoelectric film is PZT4, and piezoelectric film thickness is that 0.5< β <0.7, piezoelectric film radius are 0.5< α <0.7 with the span of the ratio α of the heavy chamber of disk body radius with the span of energy accumulator Thickness Ratio β.
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 and are adopted pilot hole to prevent that energy accumulator from rocking, therefore reliability is high, generated energy is large, utilize the exciting magnet excitation energy accumulator rotating with cylindrical body, effectively speed belt wide, can be used for high rotating speed occasion.
Brief description of the drawings
Fig. 1 is the section of structure of a 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 assembly structure schematic diagram of the utility model bearing main body part;
Fig. 5 is the structural representation of the utility model retainer;
Fig. 6 is the structural representation of the utility model disk body;
Fig. 7 is the configuration relation schematic diagram of the utility model exciting magnet and excited magnet;
Fig. 8 be different determine angle than time beam on the graph of relation of the suffered active force of magnet and corner ratio;
Fig. 9 is drive factor, maximum force and the graph of relation of determining angle ratio;
Figure 10 is structural coefficient and the when graph of relation of radius ratio of thickness.
Embodiment
As shown in Fig. 1～Fig. 6, comprise inner ring 1, cylindrical body 2, outer ring 4, retainer 1 and retainer 23 ' be provided with die cavity 31, shoulder hole 32 and through hole 33, exciting magnet C2 in the shoulder hole 32 of retainer 1 and retainer 23 ' and be embedded in retainer 1 and retainer 23 ' passes through rivet, be placed in retainer 1 and retainer 23 ' die cavity 31 in the two ends of cylindrical body 2 be inlaid with exciting magnet C2, and one end of described exciting magnet C2 is from retainer 1 and retainer 23 ' through hole 33 stretch out, the two ends of inner ring 1 are provided with multidiameter shaft 11, the two ends of outer ring 4 are provided with shoulder hole 41, on described multidiameter shaft 11 or in shoulder hole 41, by interference fit, disk body 7 is housed, the both sides of disk body 7 are respectively equipped with heavy chamber 71 and annular groove 72, heavy chamber 71 is provided with pilot hole 74 and wire guide 75 with the diapire 73 in the middle of annular groove 72, sensor one S1 and sensor two S2 or sensor Three S's 3 and sensor four S4 are installed on the sidewall of annular groove 72, circuit board B and cover plate 5 are arranged on the side that is provided with annular groove 72 and heavy chamber 71 on disk body 7 by screw respectively, described cover plate 5 is provided with heavy chamber 51, between cover plate 5 and disk body 7, be crimped with metallic film 6, be placed on the metallic film 6 at the heavy chamber 71 of disk body 7 and 51 places, heavy chamber of cover plate 5 and form energy accumulator A by being bonded with piezoelectric film 8, the center riveted joint of energy accumulator A has excited magnet C1, excited magnet C1 is socketed in pilot hole 74, described excited magnet C1 equates respectively with radius and the turning radius thereof of exciting magnet C2, the each energy accumulator A and sensor one S1 that are placed on same disk body 7 are connected with circuit board B by different wire groups respectively with sensor four S4 with sensor two S2 or sensor Three S's 3.
In working procedure, in the time that inner ring 1 and outer ring 4 relatively rotate, and produce relative rotation between the relatively-stationary energy accumulator A in inner ring 1 or outer ring 4 and excited magnet C1 and cylindrical body 2 and exciting magnet C2, thereby change the axial force between excited magnet C1 and exciting magnet C2, make energy accumulator A produce cyclic bending distortion and convert mechanical energy to electric energy, the electric energy generating is sensing and monitoring system power supply after conversion treatment.In the utility model, prevent that by pilot hole 74 energy accumulator A from rocking, therefore can obtain larger generating capacity and higher reliability simultaneously.
According to mechanical knowledge, when the stationary object that quality is M is subject to after external force F action time t, its speed obtaining is that v=Ft/M, kinetic energy are E=(Ft)
2/ (2M).Obviously,, in the time that other condition is identical, when the action time of power is too short, object can be because gained energy shortage be to overcome still transfixion of inertial force.Encouraging based on magnetic in the rotary piezoelectric generator of coupling excitation, the action time of excitation force F is two and relatively rotates the overlapping time of magnet and increase and shorten with rotating speed, and in the time that rotating speed is too high, energy accumulator A will can effectively not encouraged.Therefore, the action time of increase excitation force or reduction relative rotation speed can effectively increase the external energy that energy accumulator A obtains.In the utility model, the relative rotation speed n1 between cylindrical body 2 and inner ring 1 and outer ring 4 is about the λ of relative rotation speed n2 between inner ring 1 and outer ring 4
n=n1/n2=r/R doubly, therefore in the situation that other condition is identical, in the utility model, the endurance of active force is the λ of the action time of power when exciting magnet C2 is placed in to direct-drive on inner ring 1 or outer ring 4
t=1/ λ
ndoubly, wherein, r and R are respectively the radius of exciting magnet C2 and the turning radius at center thereof to=R/r.Therefore, utilize the exciting magnet C2 excitation energy accumulator A rotating with cylindrical body 2 in the utility model, the kinetic energy obtaining is the λ utilizing while exciting magnet C2 direct-drive being installed on inner ring 1 or outer ring 4
e=(R/r)
2doubly, thus effectively speed belt wide, be more suitable for the occasion that rotating speed is higher.
In the utility model, for improving the generating capacity of energy accumulator A, be placed in close installation of opposite pole of two exciting magnet C2 of same shaft section, be placed in the axial arrangement opposite direction of the magnetic pole of adjacent exciting magnet C2 on two circumference of same cross section, and the quantity n that is placed in bearing the same side and is the exciting magnet C2 on same shaft section should meet following formula,
wherein, r and R are respectively the radius of exciting magnet C2 and the turning radius at center thereof; Or determine angle than meeting
wherein Q1 is two of the exciting magnet C2 angles between the crossing tangent line in bearing gyration center place, and Q2 is the angle between the line of two adjacent exciting magnet C2 centers and its gyration center.
For improving the generating capacity of energy accumulator A, when other condition is determined, should improve as far as possible the amount of deformation of energy accumulator A and be excited number of times, improve amplitude and the excitation number of times of suffered excitation force, and should make the excited magnet C1 on energy accumulator A bear attraction force and repulsive force alternately, therefore the configuration mode of the magnetic pole of exciting magnet C2 is: be placed in the opposite pole of two exciting magnet C2 of same shaft section near installing, be placed in the axial arrangement opposite direction of the magnetic pole of adjacent exciting magnet C2 on two circumference of same cross section; In addition,, in the time that bearing inner race 1 and outer ring 4 relatively rotate one week, the electric energy that single energy accumulator A produces can be expressed as:
wherein C
ffor the free capacitance of energy accumulator A, V
g=η F is the off load voltage that energy accumulator A generates, and η is the voltage coefficient relevant with energy accumulator A yardstick and material, h=nF
2be called drive factor, λ=C
fη
2/ 2 are called structural coefficient, and n is the quantity of the one-sided exciting magnet C2 of bearing.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 C2; Wherein, the quantity n of exciting magnet C2 encourages number of times and amount of force two aspects to affect the power generation characteristics of energy accumulator A by change.The actual conditions that are space distribution according to the working principle of the utility model roller bearing and magnetic field, arbitrary excited magnet C1 is subject to the effect of multiple exciting magnet C2 simultaneously, and the size of total force F depends on determines angle ratio
wherein
for two of the exciting magnet C2 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 C2 centers and its gyration center, r and R are respectively the radius of exciting magnet C2 and the turning radius at center thereof, can will determine angle than the function that converts exciting magnet C2 quantity n to thus,
further research shows, exists the different best angles of determining to make the suffered active force of energy accumulator A, voltage and electric energy maximum than k; In the time getting k=1～1.5, the scope of exciting magnet C2 quantity n is
time, the electric energy obtaining and voltage are all larger, wherein drive factor be not less than its peaked 1/2.
Fig. 8 provided different determine angle than time excited magnet C1 suffered directed force F with corner than the test curve of j=Q3/Q1, wherein Q3 is excited magnet C1 and a certain exciting magnet C2 overlapping rear turned over corner completely, is the position relationship between excited magnet C1 and each exciting magnet C2 therefore corner characterizes than j.Fig. 8 explanation, determine angle when different, the suffered exciting magnet C2 of excited magnet C1 active force big or small and the number of times difference encouraging.Active force amplitude and drive factor with determine angle than the relation curve of k as shown in Figure 9, 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 A self, the material of metallic film 6 is beryllium bronze, the material of piezoelectric film 8 is PZT4, and the span that piezoelectric film 8 thickness and the span of the Thickness Ratio β of energy accumulator A are the ratio α of the radius in the radius of 0.5< β <0.7, piezoelectric film 8 and the heavy chamber 71 of disk body 7 is 0.5< α <0.7.
The utility model adopts the energy accumulator A of circular piezoelectric film 8 and metallic film 6 bonding structures, when the radius in the heavy chamber 71 of energy accumulator A thickness and disk body 7 is given timing, the thickness of piezoelectric film 8 and radius excessive or too small all can make energy accumulator A generating capacity reduce, in reality, existing best piezoelectric film 8 thickness to make the generated energy of energy accumulator A than the radius of β and piezoelectric film 8 with the ratio α of the radius in the heavy chamber 71 of disk body 7 with energy accumulator A total thickness is structural coefficient maximum.After the material parameter of metallic film 6 and piezoelectric film 8 is determined, can further try to achieve the relation of generated energy or structural coefficient λ and Thickness Ratio β and radius ratio α.The material of metallic film 6 of the present utility model is beryllium bronze, and the material of piezoelectric film 8 is PZT4, its structural coefficient and thickness when radius ratio relation as shown in figure 10.According to Figure 10, the better parameter area that the utility model is formed energy accumulator A by beryllium bronze and PZT4 is 0.5< β <0.7,0.5< α <0.7.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420283417.9U CN203856886U (en) | 2014-05-28 | 2014-05-28 | High-speed cylindrical roller bearing with self-generating monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420283417.9U CN203856886U (en) | 2014-05-28 | 2014-05-28 | High-speed cylindrical roller bearing with self-generating monitoring device |
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| Publication Number | Publication Date |
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| CN203856886U true CN203856886U (en) | 2014-10-01 |
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| CN201420283417.9U Expired - Lifetime CN203856886U (en) | 2014-05-28 | 2014-05-28 | High-speed cylindrical roller bearing with self-generating monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994144A (en) * | 2014-05-28 | 2014-08-20 | 浙江师范大学 | High speed cylindrical roller bearing with self-generating monitoring device |
| CN110552956A (en) * | 2019-08-14 | 2019-12-10 | 上海交通大学 | Full self-powered rolling bearing internal sensing data acquisition wireless transmission device |
-
2014
- 2014-05-28 CN CN201420283417.9U patent/CN203856886U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994144A (en) * | 2014-05-28 | 2014-08-20 | 浙江师范大学 | High speed cylindrical roller bearing with self-generating monitoring device |
| CN110552956A (en) * | 2019-08-14 | 2019-12-10 | 上海交通大学 | Full self-powered rolling bearing internal sensing data acquisition wireless transmission device |
| CN110552956B (en) * | 2019-08-14 | 2020-11-10 | 上海交通大学 | Fully self-powered rolling bearing internal sensor data acquisition wireless transmission device |
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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: 20160217 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |