CN204481667U - The flexible speed changer of double bracing permanent-magnet eddy current - Google Patents

The flexible speed changer of double bracing permanent-magnet eddy current Download PDF

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Publication number
CN204481667U
CN204481667U CN201520071191.0U CN201520071191U CN204481667U CN 204481667 U CN204481667 U CN 204481667U CN 201520071191 U CN201520071191 U CN 201520071191U CN 204481667 U CN204481667 U CN 204481667U
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disc
permanent
bearing
eddy current
power
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CN201520071191.0U
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Chinese (zh)
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王俊杰
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Anhui Wofu Permanent Magnet Technology Co., Ltd
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Anhui Wo Fu Power Tech Corp Inc
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Abstract

The utility model discloses the flexible speed changer of a kind of double bracing permanent-magnet eddy current, comprise the power rotor be connected with power shaft, the driven rotor be connected with output shaft, there is between described power rotor and driven rotor the permanent magnetic rotation disc be oppositely arranged and conductor rotating disk, also comprise the speed adjusting gear for regulating described driven rotor rotating speed, described power shaft is bearing in a power shaft bearing, and described power shaft bearing is fixed in an input supporting bracket; Described output shaft is bearing in an output shaft bearing, and described output shaft bearing is fixed in an output supporting bracket, and described input supporting bracket and output supporting bracket parallel and be fixedly connected on same base.Utility model works is reliable, and failure rate is low, good heat dissipation effect, fail safe is higher, can transmit high-power, high pulling torque.

Description

The flexible speed changer of double bracing permanent-magnet eddy current
Technical field
The utility model relates to a kind of speed regulating device, specifically, relates to a kind of permanent-magnet eddy current drive technology that utilizes to reach the flexible speed changer of speed governing object.
Background technology
At present, the main mode of speed regulation of high-power high voltage asynchronous motor has following several: fluid coupling speed governing, frequency control and permanent-magnet eddy current speed governing etc.
Fluid coupling speed governing: belong to poor efficiency mode of speed regulation, speed adjustable range is limited, throws switch about 5% ~ 10% at a high speed, low speed slip loss is large, reaches as high as more than 30% of rated power, precision is low, poor linearity, low-response, starting current is large, and volume is large, is not suitable for transformation; Easy leakage, safeguard complicated, costly, the needs improving integrated automation level can not be met.
High voltage converter speed governing: the technology being the general and relative advanced person of current Application comparison, the speed of power electronic technology to motor is adopted to regulate, automatically can control according to actual condition, the energy-saving effect of greater efficiency can be realized, but frequency converter operationally can produce harmonic wave, electronic building brick is many and soon aging, to environmental requirement, under high and hyperbaric environment, failure rate is high, poor stability, professional is needed to safeguard, maintenance cost is high, and duration of service is short, and scene needs special space to place the power distribution room of frequency converter.
Permanent-magnet eddy current speed governing: be special for centrifugal loads such as blower fan, pump classes applicable variable speed energy saving technology.It has energy-efficient, high reliability, without the transmitting torque that is rigidly connected, can apply in the presence of a harsh environment, greatly reduce entire system vibration, reduce system maintenance and extend the features such as system useful life.Especially, permanent-magnet eddy current speed regulator does not produce high order harmonic component, and can not cause under low speed that the motor feels hot, has excellent governor control characteristics, becomes the first-selection of blower fan and pump apparatus energy saving technical reconstruction.Permanent-magnet eddy current speed regulator has that adjustable range is wide, fast response time, structure simple, failure rate is low, later maintenance cost are low, reliability is high, long service life, can under-10 DEG C ~ ﹢ 50 DEG C of ambient temperature conditions the advantage such as Long-Time Service.
The flexible speed changer of permanent-magnet eddy current is realized by the torque transfer of motor to load by the air gap between conductor disc and permanent magnetic disk.The driving (motor) of this technology and driven mechanical between (load) to connect, its operation principle is the size of gaps by changing between conductor disc and permanent magnetic disk, thus regulate the speed discrepancy between motor and load, finally reach the object of speed governing.
Such as, Chinese utility model patent CN203313032U discloses a kind of permanent-magnet speed governor, the speed adjusting gear comprising the external rotor be connected with the first axle, the internal rotor be connected with the second axle and be connected with internal rotor, described external rotor is provided with the first rotor dish and the second rotor disk, described internal rotor is provided with third trochanter dish and fourth trochanter dish, the first rotor dish is relative with third trochanter dish and maintain air gap, and the second rotor disk is relative with fourth trochanter dish and maintain air gap, described internal rotor also comprises a telophragma, described telophragma is fixedly connected with the second axle and between third trochanter dish and fourth trochanter dish, third trochanter dish is socketed on the second axle slidably, fourth trochanter dish is then connected with described speed adjusting gear by bearing, third trochanter dish, many torsion pass pins parallel with the second axle are worn between telophragma and fourth trochanter dish, third trochanter dish, also air gap adjusting device is provided with between fourth trochanter dish and telophragma, described air gap adjusting device comprises the gear tooth bar parallel with two, two toothed rack lay respectively at described gear both sides and and gears meshing, be arranged on telophragma described gear being rotatable, wherein a toothed rack is fixedly connected on third trochanter dish, another toothed rack is fixedly connected on fourth trochanter dish.Described speed adjusting gear comprises a bearing pedestal and a sliding outer cover, bearing is provided with between described bearing pedestal and the second axle, the external cylindrical surface of described bearing pedestal is provided with helicla flute, the lower end of described sliding outer cover is enclosed within bearing pedestal, sliding outer cover is fixed with roller and swing arm, described roller inserts in the helicla flute of bearing pedestal, and described swing arm is connected with an electric actuator, and the upper end of described sliding outer cover to be enclosed within slidably on the second axle and to be connected with fourth trochanter dish by bearing.
But; in these permanent-magnet speed governors existing, the axial location of power shaft is unfixed; the axial location that can only ensure between power shaft and output shaft by the installation site of motor shaft; and some motor shaft usually have axle alter phenomenon occur; cause that rotating disk be connected on motor shaft can move axially within the specific limits with motor shaft; when inside and outside rotating disk operates under minimum clearance; motor shaft is once generation axle is altered; then just likely produce wiping dish between inside and outside rotating disk, thus affect the normal use of permanent-magnet speed governor.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of axial location, the flexible speed changer of permanent-magnet eddy current of avoiding occurring because motor shaft is altered wiping dish that can limit power shaft, to overcome the above-mentioned defect of prior art.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: the flexible speed changer of a kind of double bracing permanent-magnet eddy current, comprise the power rotor be connected with power shaft, the driven rotor be connected with output shaft, there is between described power rotor and driven rotor the permanent magnetic rotation disc be oppositely arranged and conductor rotating disk, also comprise the speed adjusting gear for regulating described driven rotor rotating speed, described power shaft is bearing in a power shaft bearing, and described power shaft bearing is fixed in an input supporting bracket; Described output shaft is bearing in an output shaft bearing, and described output shaft bearing is fixed in an output supporting bracket, and described input supporting bracket and output supporting bracket parallel and be fixedly connected on same base.
Preferably, bearing rib is connected with between the two sides of described input supporting bracket and base top surface.
Preferably, bearing rib is connected with between the two sides of described output supporting bracket and base top surface.
Preferably, described speed adjusting gear is connected with driven rotor, described speed adjusting gear comprises a sliding outer cover and is arranged on the helicla flute on output shaft bearing external cylindrical surface, one end of described sliding outer cover is enclosed within output shaft bearing, sliding outer cover is fixed with pulley and swing arm, described pulley can slide in the helicla flute of output shaft bearing, and described swing arm is connected with an electric actuator.
Preferably, described power rotor is made up of two conductor rotating disks, connects into cage structure between two conductor rotating disks by polylith air gap plate, is provided with the eddy current fin along the circumferential direction arranged between adjacent two blocks of air gap plates; Described driven rotor is made up of rotating disk in the middle of two permanent magnetic rotation discs and.
More preferably, each conductor rotating disk is formed by front disc, back side disc and radiating block, and front disc is made up of copper or aluminum, and back side disc is made up of Steel material.
More preferably, together with the front disc of described conductor rotating disk fits tightly with back side disc employing explosive welding process.
More preferably, adopt thermal-flame by copper powder or aluminium powder even application on the back side disc of conductor rotating disk, form thickness uniform front disc.
More preferably, forming by front disc, back side disc and radiating block of each conductor rotating disk, front disc is made up of superconductor, and back side disc is made up of Steel material.
Compared with prior art, the technical scheme that the utility model adopts has the following advantages:
(1) because the two ends of power shaft are bearing in a fixing input supporting bracket by power shaft bearing, the axial location of power shaft is made to be fixing, thus the axial motion of the power rotor be arranged on power shaft is restricted, prevent because of motor shaft alter cause the air gap between permanent magnetic rotation disc and conductor rotating disk disappear and cause wiping dish, thus ensure that the normal work of the flexible speed changer of permanent-magnet eddy current, reduce the rate of breakdown of permanent-magnet variable-speed device.
(2) structure of the utility model to conductor rotating disk is also improved, and caloric value is less, better heat-radiation effect, and fail safe is higher.
(3) the utility model along the circumferential direction increases a coil vortex fin newly in the periphery of power rotor, coordinates the radiating block at the conductor rotating disk back side, improves radiating effect further.
(4) transmission efficiency of the present utility model is higher, and transmitting torque can reach 4000kw/1000rpm.
Accompanying drawing explanation
Fig. 1 is the structure cutaway view of the flexible speed changer of the utility model double bracing permanent-magnet eddy current.
Fig. 2 is the STRUCTURE DECOMPOSITION schematic diagram of power rotor in the utility model.
Fig. 3 is the STRUCTURE DECOMPOSITION schematic diagram of driven rotor in the utility model.
Fig. 4 is the structural representation of output shaft bearing and speed adjusting gear in the utility model.
Fig. 5 is the schematic diagram of power shaft bearing in the utility model.
In figure:
1, base 2, power shaft 3, power shaft bearing 4, input supporting bracket
5, power rotor 6, driven rotor 7, speed adjusting gear 8, output shaft bearing
9, supporting bracket 10, output shaft 11, bearing rib 12, bearing rib is exported
13, bearing rib 14, bearing rib 21, the shaft shoulder 31, end cap
32, end cap 33, bearing 34, spacer 35, bearing
36, back-up ring 51, conductor rotating disk 52, eddy current fin 53, air gap plate
61, permanent magnetic rotation disc 62, middle rotating disk 63, pinion 64, tooth bar
65, torsion pass post 71, sliding outer cover 72, bearing 73, sliding inner sleeve
74, swing arm 81, bearing
Embodiment
Be described in further detail the utility model below in conjunction with the drawings and specific embodiments, those skilled in the art can more clearly understand other advantages of the present utility model and effect thus.
It should be noted that, the structure that Figure of description illustrates, ratio, size etc., only in order to coordinate embodiment, more clearly understand design of the present utility model for those skilled in the art, and be not used to limit protection range of the present utility model.The adjustment of the modification of any structure, the change of proportionate relationship or size, when not affecting effect of the present utility model and object reaches, all should still drop within protection range of the present utility model.
As shown in Figure 1, the flexible speed changer of a kind of double bracing permanent-magnet eddy current of the utility model, comprise power rotor 5 and a driven rotor 6, power rotor 5 and driven rotor 6 are respectively equipped with permanent magnetic rotation disc and conductor rotating disk, and permanent magnetic rotation disc and conductor rotating disk are oppositely arranged and are separated by air gap, namely permanent magnetic rotation disc and conductor rotating disk are in normal state and contactless, by the interaction in permanent magnetic field and inductive loop magnetic field and transmitting torque between them, in other words, between power rotor 5 and driven rotor 6 be a kind of invisible flexibly connecting.
In the present embodiment, as shown in Figure 2, power rotor 5 is made up of two conductor rotating disks 51, connects into cage structure between two conductor rotating disks 51 by polylith air gap plate 53, be provided with the eddy current fin 52 along the circumferential direction arranged between adjacent two blocks of air gap plates 53, improve radiating effect further; As shown in Figure 3, driven rotor 6 is made up of rotating disk 62 in the middle of two permanent magnetic rotation discs 61 and, and these two permanent magnetic rotation discs 61 are relative with the conductor rotating disk of two on power rotor 5 respectively, so as between power rotor 5 and driven rotor 6 transmitting torque.Obviously, if two permanent magnetic rotation discs are positioned on power rotor 5, and two conductor rotating disks are positioned on driven rotor 6; Or a permanent magnetic rotation disc and a conductor rotating disk are set on power rotor 5, a conductor rotating disk and a permanent magnetic rotation disc are set accordingly on driven rotor 6, also can realize the transmission of moment of torsion.
Continue with reference to Fig. 1, power rotor 5 is connected with power shaft 2, and power shaft 2 can be connected with motor shaft, and power shaft 2 is bearing in a power shaft bearing 3, and power shaft bearing 3 is fixed in an input supporting bracket 4.Driven rotor 6 is connected with output shaft 10, and output shaft 10 is for being connected with load equipment, and driven rotor 6 can slide axially on output shaft 10, but driven rotor 6 can drive again output shaft 10 to rotate together.Described output shaft 10 is bearing in an output shaft bearing 8, output shaft bearing 8 is fixed in an output supporting bracket 9, multiple bearing 81 (see Fig. 4) is provided with in output shaft bearing 8, for rotatably support output shaft 10, described input supporting bracket 4 and output supporting bracket 9 parallel and are fixedly connected on same base 1, and base 1 is hard-wired.
Input supporting bracket 4 forms axial limiting together with power shaft bearing 3 pairs of power shafts 2, the axial endplay of power shaft 2 can be stoped, bearing rib 13,14 is connected with between the two sides and the end face of base 1 of input supporting bracket 4, when inputting supporting bracket 4 and being subject to the axial force from power shaft 2, bearing rib 13,14 can prevent input supporting bracket 4 from occuring bending and deformation, thus more reliably stops the axial endplay of power shaft 2.
In like manner, export supporting bracket 9 and form axial limiting together with output shaft bearing 8 pairs of output shafts 10, export between the two sides of supporting bracket 9 and the end face of base 1 and be connected with bearing rib 11,12, thus more reliably stop the axial endplay of output shaft 10.
The flexible speed changer of the utility model also comprises one for regulating the speed adjusting gear 7 of described driven rotor rotating speed, as shown in Figure 4, the helicla flute (not shown) that this speed adjusting gear comprises a sliding outer cover 71 and is arranged on output shaft bearing 8 external cylindrical surface, one end of sliding outer cover 71 is enclosed within the external cylindrical surface of output shaft bearing 8, sliding outer cover 71 is fixed with pulley (not shown) and swing arm 74, described pulley can slide in the helicla flute of output shaft bearing 8, and swing arm 74 is connected with an electric actuator (not shown), a sliding inner sleeve 73 is also provided with in the inside of sliding outer cover 71, sliding inner sleeve 73 can be enclosed within output shaft 10 axially slidably, one end of sliding inner sleeve 73 is connected with driven rotor 6, bearing 72 is provided with between sliding outer cover 71 and sliding inner sleeve 73, therefore, when sliding inner sleeve 73 rotates with driven rotor 6 with output shaft 10, sliding outer cover 71 can keep not turning.But, when electric actuator drives sliding outer cover 71 to rotate by swing arm 74, due to spiral fluted effect, sliding outer cover 71 can produce axial displacement, drive sliding inner sleeve 73, driven rotor 6 produce axial displacement relative to output shaft 10 together, thus the size of gaps between permanent magnetic rotation disc and conductor rotating disk can change, and cause the rotating speed of driven rotor 6 to change, reach the object of regulation output axle 10 rotating speed.
As shown in Figure 3, permanent magnetic rotation disc 61 is made up of front disc 611, permanent magnet 612 and pressing plate 613, and permanent magnet 612 is embedded in front disc 611, and permanent magnet 612 is fixed on front disc 611 from the back side by pressing plate 613.Form the both sides that two permanent magnetic rotation discs 61 of driven rotor 6 are positioned at middle rotating disk 62, be connected by torsion pass post 65 between two permanent magnetic rotation discs 61 and middle rotating disk 62, make driven rotor 6 can integrally transmitting torque.Pinion 63 is provided with in through hole on middle rotating disk 62, two permanent magnetic rotation discs 61 are respectively fixed with tooth bar 64, tooth bar 64 on two permanent magnetic rotation discs 61 lays respectively at the both sides of pinion 63 and engages with pinion 63, tooth bar 64 and pinion 63 form air gap adjusting device, when one of them permanent magnetic rotation disc 61 is close or away from middle rotating disk 62, can drive another permanent magnetic rotation disc 61 synchronously near or away from middle rotating disk 62, the air gap between two permanent magnetic rotation discs 61 and two conductor rotating disks so just can be made to be consistent.
As shown in Figure 2, each conductor rotating disk 51 is formed by front disc 511, back side disc 512 and radiating block 513, and front disc 511 is relative with permanent magnetic rotation disc, for generation of eddy current, therefore front disc 511 can be made up of copper or aluminum, and back side disc 512 is then made up of Steel material.
The structure of preferred embodiment of the present utility model to conductor rotating disk 51 also makes improvements, the front disc 511 of conductor rotating disk and back side disc 512 adopt together with explosive welding process fits tightly by the utility model, the connection reliability of front disc 511 and back side disc 512 can be ensured well, use safer; And the gap can eliminated between them, greatly improve radiating effect.
For the flexible speed changer of more powerful permanent-magnet eddy current, can adopt flame spraying process, adopt thermal-flame by copper powder or aluminium powder even application on the back side disc 512 of conductor rotating disk, the copper powder after fusing or aluminium powder form thickness uniform front disc 511.This mode not only combines tightr, and thickness is more even, can improve radiating effect significantly and reduce caloric value.
Further, superconductor can be adopted to make front disc 511, thus thoroughly solve the heating problem of conductor rotating disk.
In sum, by above-mentioned corrective measure, can improve the radiating effect of conductor rotating disk or reduce caloric value, make the transmission efficiency of the flexible speed changer of the utility model permanent-magnet eddy current higher, can transmit high-power, transmitting torque can reach 4000kw/1000rpm.
As shown in Figure 5, the inside of power shaft bearing 3 is provided with two bearings 33,35, for rotatably support power shaft 2.The two ends of power shaft bearing 3 are respectively equipped with end cap 31,32, for the outer ring of rigid bearing 33,35.One end of power shaft 2 is provided with the shaft shoulder 21, and the inner ring of one of them bearing 33 withstands on the shaft shoulder 21, is provided with spacer 34, power shaft 2 is also fixed with back-up ring 36 between the inner ring of two bearings 33,35, for fixing the inner ring of another bearing 35.Like this, power shaft 2 in the axial direction just by bidirectionally limited in power shaft bearing 3, when coupled motor shaft generation axle is altered, power shaft 2 can not occur axially displaced, thus avoid the air gap between permanent magnetic rotation disc and conductor rotating disk that less desirable change occurs, even cause the generation of wiping dish.Therefore, the flexible transmission duty of the utility model double bracing permanent-magnet eddy current is more reliable, reduces rate of breakdown.
Certainly, above is only embody rule example of the present utility model, does not constitute any limitation protection range of the present utility model.In addition to the implementation, the utility model can also have other execution mode.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the utility model scope required for protection.

Claims (9)

1. the flexible speed changer of double bracing permanent-magnet eddy current, comprise the power rotor be connected with power shaft, the driven rotor be connected with output shaft, there is between described power rotor and driven rotor the permanent magnetic rotation disc be oppositely arranged and conductor rotating disk, also comprise the speed adjusting gear for regulating described driven rotor rotating speed, it is characterized in that, described power shaft is bearing in a power shaft bearing, and described power shaft bearing is fixed in an input supporting bracket; Described output shaft is bearing in an output shaft bearing, and described output shaft bearing is fixed in an output supporting bracket, and described input supporting bracket and output supporting bracket parallel and be fixedly connected on same base.
2. the flexible speed changer of double bracing permanent-magnet eddy current according to claim 1, is characterized in that, be connected with bearing rib between the two sides of described input supporting bracket and base top surface.
3. the flexible speed changer of double bracing permanent-magnet eddy current according to claim 1, is characterized in that, be connected with bearing rib between the two sides of described output supporting bracket and base top surface.
4. the flexible speed changer of double bracing permanent-magnet eddy current according to claim 1, it is characterized in that, described speed adjusting gear is connected with driven rotor, described speed adjusting gear comprises a sliding outer cover and is arranged on the helicla flute on output shaft bearing external cylindrical surface, one end of described sliding outer cover is enclosed within output shaft bearing, sliding outer cover is fixed with pulley and swing arm, described pulley can slide in the helicla flute of output shaft bearing, and described swing arm is connected with an electric actuator.
5. the flexible speed changer of double bracing permanent-magnet eddy current according to claim 1, it is characterized in that, described power rotor is made up of two conductor rotating disks, connect into cage structure by polylith air gap plate between two conductor rotating disks, between adjacent two blocks of air gap plates, be provided with the eddy current fin along the circumferential direction arranged; Described driven rotor is made up of rotating disk in the middle of two permanent magnetic rotation discs and.
6. the flexible speed changer of double bracing permanent-magnet eddy current according to claim 5, it is characterized in that, each conductor rotating disk is formed by front disc, back side disc and radiating block, and front disc is made up of copper or aluminum, and back side disc is made up of Steel material.
7. the flexible speed changer of double bracing permanent-magnet eddy current according to claim 6, is characterized in that, together with the front disc of described conductor rotating disk and back side disc employing explosive welding process fit tightly.
8. the flexible speed changer of double bracing permanent-magnet eddy current according to claim 6, is characterized in that, adopts thermal-flame by copper powder or aluminium powder even application on the back side disc of conductor rotating disk, forms thickness uniform front disc.
9. the flexible speed changer of double bracing permanent-magnet eddy current according to claim 5, is characterized in that, forming by front disc, back side disc and radiating block of each conductor rotating disk, front disc is made up of superconductor, and back side disc is made up of Steel material.
CN201520071191.0U 2015-01-30 2015-01-30 The flexible speed changer of double bracing permanent-magnet eddy current Active CN204481667U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104660007A (en) * 2015-01-30 2015-05-27 安徽沃弗电力科技有限公司 Double-support permanent magnet eddy-current flexible transmission
CN107394988A (en) * 2017-09-19 2017-11-24 安徽沃弗电力科技有限公司 A kind of magnetic coupling heat sink

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104660007A (en) * 2015-01-30 2015-05-27 安徽沃弗电力科技有限公司 Double-support permanent magnet eddy-current flexible transmission
CN104660007B (en) * 2015-01-30 2018-04-17 安徽沃弗电力科技有限公司 Dual-gripper permanent-magnet eddy current flexibility speed changer
CN107394988A (en) * 2017-09-19 2017-11-24 安徽沃弗电力科技有限公司 A kind of magnetic coupling heat sink
CN107394988B (en) * 2017-09-19 2019-11-26 安徽沃弗电力科技有限公司 A kind of magnetic coupling heat sink

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Address after: 230088 Anhui high tech Zone Hefei City Wangjiang Road and Jin Gui Lu intersection Kunpeng Industrial Park AE-3 (dressing room)

Patentee after: Anhui Wofu Permanent Magnet Technology Co., Ltd

Address before: 230088 Anhui high tech Zone Hefei City Wangjiang Road and Jin Gui Lu intersection Kunpeng Industrial Park AE-3 (dressing room)

Patentee before: ANHUI WOLF POWER TECHNOLOGY Co.,Ltd.