WO2021008193A1 - 一种单极磁体旋转式可调速笼型磁力耦合器 - Google Patents
一种单极磁体旋转式可调速笼型磁力耦合器 Download PDFInfo
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- WO2021008193A1 WO2021008193A1 PCT/CN2020/087977 CN2020087977W WO2021008193A1 WO 2021008193 A1 WO2021008193 A1 WO 2021008193A1 CN 2020087977 W CN2020087977 W CN 2020087977W WO 2021008193 A1 WO2021008193 A1 WO 2021008193A1
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- disc
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- permanent magnet
- guide rod
- cage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
- H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
- H02K49/046—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with an axial airgap
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/108—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with an axial air gap
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
Definitions
- the invention relates to the field of mechanical transmission, and is a magnetic transmission and speed regulating device that realizes torque transmission through non-contact induction, in particular to a unipolar magnet rotating type adjustable speed cage magnetic coupling. It can be used as a transmission device for torque transmission and speed regulation between a large vibration motor and a load.
- the magnetic coupling uses the permanent magnetic field and the induced magnetic field to couple to transmit torque. Its unique non-contact transmission can effectively reduce the noise, vibration, friction and wear problems in the traditional mechanical transmission, and greatly improve the transmission device In addition to the service life, there is also the effect of energy saving and environmental protection. Based on the above advantages, magnetic couplings have been widely used in chemical, metallurgy, textile, miners, and transportation industries.
- Chinese patent 20171041913.7 discloses a disc-type speed-regulating magnetic coupling based on bevel gear transmission and its speed-regulating method.
- the solid copper disc used in this invention has a circular shape with the same number of poles as the permanent magnet during operation. Induced current, the resulting eddy current loss is relatively large.
- the speed regulation principle converts the axial displacement of the dial block into the rotation of the large bevel gear sleeve, and realizes the rotation of the permanent magnet through the bevel gear meshing transmission, thereby changing the permanent magnet and the conductor plate
- the average facing area and the air gap distance between them also change the arrangement of the N and S poles, thereby changing the air gap magnetic density to achieve speed regulation, but due to the limit of the magnet rotation angle, its speed regulation range It is small and cannot meet the requirements of varying degrees of speed regulation.
- the present invention provides a unipolar magnet rotary adjustable speed cage magnetic coupling.
- the copper disk adopts a cage-shaped copper disk, and fan-shaped circular currents are generated around all the fan-shaped grooves.
- the generated eddy current loss is small and the transmission efficiency is high.
- the fan-shaped groove of the cage-shaped copper disk and the surface of the yoke are small.
- the bump is an interference fit, and the small bump of the yoke modulates the magnetic field, which further improves the electromagnetic torque of the coupler.
- the present invention provides three speed regulation modes.
- the first one is to adjust the air gap between the cage-shaped copper disc and the active disc through the axially moving speed regulation device.
- the speed regulation mode generally has a larger speed regulation range.
- the second method is to fix the air gap size to change the angle of the rotating permanent magnet assembly to adjust the facing area between the cage copper disk and the active disk.
- This speed regulation method is used when the range is small.
- One is a compound speed control that uses an axial moving speed control device to adjust the size of the air gap between the two discs and change the rotation angle of the rotating permanent magnet assembly. This method can make the speed control more accurate. Therefore, the coupler can meet various speed regulation requirements.
- a single-pole magnet rotary adjustable speed cage magnetic coupling which is composed of a driving disc assembly, a driven disc assembly and an axial movement speed regulating device.
- the driving disc assembly includes a ring-shaped shift block, a shift block pin, Driving shaft, big bevel gear sleeve, small bevel gear, pinion shaft and permanent magnet assembly, big gear sleeve is sleeved on the driving shaft, ring shift block is sleeved on the right end of the driving shaft, and the shift block pin is inserted on the ring shift block In the radial circular through hole and keep contact with the inner wall of the chute on the surface of the big gear sleeve and the inner wall of the straight groove on the surface of the driving shaft, the left end of the driving shaft is connected with the driving disc through a key, and the permanent magnet assembly includes embedded permanent magnets And a single-pole rotating permanent magnet assembly, in which a number of magnets with the same magnetizing direction are embedded and installed in the fan-shaped slot on the left end of the
- the magnet and the small block yoke of equal cross-sectional area are bonded and installed by structural glue and curing agent to form a unipolar magnet rotating assembly.
- the pinion shaft passes through the circular hole between the single-pole rotating permanent magnet and the small yoke and the axial communication
- the radial through hole on the inner and outer surface of the hole is installed in the axial through hole of the driving disc.
- the lower end of the pinion shaft is equipped with a small bevel gear to mesh with a large bevel gear sleeve, and a single pole composed of a single-pole rotating permanent magnet and a small yoke
- the rotating magnet assembly can rotate around the pinion shaft in the axial through hole.
- the driven disk assembly includes a driven shaft, a copper disk yoke and a caged copper disk.
- the right side of the driven shaft is provided with a copper disk yoke and a caged copper disk.
- the copper disk yoke is connected with the driven shaft through a key.
- a number of fan-shaped grooves are machined on the surface of the copper plate and connected with small fan-shaped bumps on the yoke of the copper plate.
- the left side of the cage-type copper disc is also equipped with an axial movement speed regulating device, which includes sleeve, guide rod, guide rod slider, short connecting rod, long connecting rod, base, disc, bearing and disc guide block, bearing installation In the base hole, there is an interference fit between the shaft part of the disc and the bearing.
- the disc guide block is connected with the long
- the rods are connected by a pin, and the pin is an interference fit between the two.
- the long link and the base are also connected by a pin.
- the pin and the base are in interference fit, and the hole under the long link is an interference fit. Clearance fit, the long link can rotate around the pin, the small hole above the long link is connected with the short link through the pin, the pin and the long link and the short link are respectively interference fit and clearance fit, and the short link can be Rotate around the pin, the small hole above the short link and the guide rod are also connected by a pin.
- the pin and the short link are interference fit, and there is a clearance fit with the guide rod.
- the guide rod is sleeved with a guide rod slider , There is a clearance fit between the two, the guide rod and the driven plate assembly are connected by a sleeve, the inner hole on the left side of the sleeve and the guide rod is an interference fit, and the inner ring on the right side of the sleeve is also with the slave The moving shaft is connected. There is an interference fit between the inner ring of the right half of the sleeve and the driven shaft. The inner ring can rotate with the driven shaft, so the driven disc assembly can be adjusted while rotating. When the disc rotates clockwise around the center line of the base hole, it also slides in the disc guide block.
- the thrust phase begins, that is, the air gap becomes smaller
- the process corresponds to the stop phase in the arc segment, and the return phase begins when the arc of the inflection point under the arc slot is reached, that is, the process of increasing the air gap.
- the number of sector grooves on the surface of the cage-shaped copper disk is not equal to the number of magnetic poles on the active disk, thereby avoiding large torque fluctuations.
- the driven disk adopts a cage-shaped copper disk with a certain number of fan-shaped grooves uniformly opened on its surface.
- the small bumps on the surface of the copper disk yoke and the fan-shaped slots are interference fit, and the small bumps act on the air gap magnetic field.
- the electromagnetic torque is further improved.
- the surface of the cage-shaped copper disk generates a ring-shaped induced current along the circumference of the fan-shaped groove, and the generated eddy current loss is small, so that the transmission efficiency of the coupler is further improved.
- the present invention includes three speed adjustment methods. One is to change the contact area between the magnet and the copper disk through the rotation of the magnet, and the other is to realize the axial movement of the driven disk through the axial movement device to change the distance between the two disks.
- the speed adjustment method of the air gap size is to use the composite speed adjustment of the air gap size between the axially moving two disks and the rotating permanent magnet. Different speed adjustment methods can meet the speed adjustment requirements of different degrees.
- the two discs can be adjusted by the axial movement device.
- the air gap between to reduce the influence of the axial force on the toggle ring slider, making the speed adjustment process of the magnet rotation easier.
- Fig. 1 is a main sectional view of the working principle of the unipolar magnet rotary adjustable-speed cage magnetic coupling and the overall device except the axial movement device according to the embodiment of the present invention
- Figure 2 is a three-dimensional assembly model diagram of the monopole magnet rotating adjustable speed cage magnetic coupling of the embodiment
- Figure 3 is an exploded view of the three-dimensional model of the magnet rotation speed regulating device of the embodiment
- Figure 4 is a three-dimensional model diagram of the axial movement speed regulating device
- Figure 5 is a three-dimensional exploded view of the axially moving speed regulating device
- Figure 6 is a schematic diagram of the cooperation between the sleeve and the driven shaft
- Figure 7 is a schematic diagram of the connection of the rotating pair in the axial movement device
- Figure 8 is a three-dimensional model diagram of the drive disc assembly of the embodiment
- Figure 9 is a schematic diagram of the three-dimensional structure of the monopole rotating magnet assembly in the permanent magnet assembly of the embodiment
- Figure 10 is a three-dimensional model diagram of the cage-shaped copper plate of the embodiment
- Figure 11 is a three-dimensional model diagram of the copper disc yoke of the embodiment
- Figure 12 is a three-dimensional assembly schematic diagram of the cage-shaped copper plate and the copper plate yoke of the embodiment
- the device is composed of a driving disc assembly I and a driven disc assembly II, and the speed regulating device is set in the driving disc assembly I.
- the driving disc assembly I includes a driving disc 5, an annular shift block 13, a shift block pin 12, a driving shaft 10, a large bevel gear sleeve 9, a small bevel gear 11, a pinion shaft 7 and
- the permanent magnet assembly 6 the outer surface of the driving shaft 10 is covered with a large gear sleeve 9, and the right end is covered with an annular shift block 13.
- the surface of the annular shift block 13 is machined with symmetrically distributed circular radial through holes
- Figure 3 the driving shaft 10 and the large bevel gear sleeve 9 are symmetrically machined with straight grooves and oblique grooves, respectively.
- the shift block pin 12 is symmetrically inserted into the radial circular through hole on the ring shift block 13 and is connected with the large gear sleeve 9
- the inner wall of the surface chute and the inner wall of the straight groove on the surface of the driving shaft 10 maintain contact and fit, so that the shift block pin can slide axially in the groove; the left end of the driving shaft 10 is shown to be connected to the driving disc 5 through a key 8, as shown in Figs.
- the pinion shaft 7 passes through the single-stage rotating permanent magnet.
- the circular hole between the small yoke and the radial through hole on the inner and outer surface of the axial through hole is installed in the axial through hole of the driving disc 5.
- the radial through hole on the inner and outer sides of the axial through hole and the pinion gear shaft 7 is a clearance fit, so the unipolar magnet rotating assembly in the permanent magnet assembly 6 can rotate around the pinion shaft 7 in the axial through hole, and the lower end of the pinion shaft 7 is equipped with a small bevel gear 11 and a large bevel gear sleeve
- the barrel 9 is engaged.
- the driven disc assembly II in Figures 1 and 2 includes a driven shaft 2, a copper disc yoke 1, a caged copper disc 4, and a copper disc yoke 1 and a caged copper disc 4 are arranged on the right side of the driven shaft.
- the disk yoke 1 is connected with the driven shaft 2 through the key 3, and the surface of the cage-shaped copper disk 4 is uniformly processed with a number of sector grooves at regular intervals, and the copper disk yoke disk 1 is also uniformly processed with sector shapes corresponding to the sector grooves.
- the small convex block is fixedly matched with the fan-shaped groove, and the groove and the small convex block are interference fit.
- the axial moving device is located on the left side of the driven shaft 2.
- FIG. 4 Its main components are shown in Figure 4 and Figure 5. It mainly includes a base 14, a long connecting rod 15, a disc guide block 16, a disc 17, and a short connecting rod. 18.
- the disc guide block 16 and the long connecting rod 15 are connected by a pin 23, and the pin 23 is an interference fit with both At the same time, the long connecting rod 15 and the base 14 are also connected by a pin 23.
- the pin 23 is an interference fit with the base 14 and is a clearance fit with the hole under the long connecting rod 15.
- the long connecting rod 15 can wrap around the pin 23
- the center line a rotates, the small hole above the long connecting rod 15 is connected with the short connecting rod 18 through the pin 23.
- the pin 23 and the long connecting rod 15 and the short connecting rod 18 are respectively interference fit and clearance fit, and the short connecting rod 18 is below
- the pin 23 can be rotated around the center line c of the pin 23.
- the small hole above the short link 18 and the guide rod 20 are also connected by a pin 23. There is an interference fit between the pin 23 and the short link 18 and between the pin 23 and the guide rod 20.
- a guide rod slider 19 is sleeved on the guide rod 20, and a clearance fit is adopted between the two.
- the disc guide block 16 swings back and forth under the drive of the disc 17, and there is a gap between the disc guide block 16 and the long connecting rod 15.
- the long link 15 is driven by the disc guide block 16 to rotate around the center line a of the base pin 23, while the short link 18 is driven by the long link 15 to rotate around the center line c of the pin 23.
- the guide rod 20 is driven to move axially back and forth in the guide rod slider 19.
- the left side of the sleeve 21 is in an interference fit with the long guide rod 20, and the right end is in an interference fit with the driven shaft 2, so the guide rod 20 can drive the cage-shaped copper disk 4 makes a reciprocating movement in the axial direction.
- the driven shaft 2 in Figure 6 can drive the inner ring of the right part of the sleeve 21 to rotate together, so that the cage-shaped copper disk 4 can rotate while realizing axial reciprocating movement.
- the arc section at the upper inflection point of the arc groove of the disc guide block 16 corresponds to the speed regulation process of reducing the air gap
- the middle arc The segment corresponds to the process where the air gap remains unchanged
- the arc segment at the lower inflection point corresponds to the speed regulation process where the air gap becomes larger.
- Speed control principle There are three speed control methods for the magnetic coupling in this article, one is through the rotation of the magnet, the other is the axial movement, and the third is the combined speed control of the magnet rotation and axial movement.
- the first is the speed control method.
- the principle is: slowly move the ring-shaped shift block 13 along the axial direction, and the shift block pin 12 also slides in the surface chute of the large gear sleeve 9 and the surface straight groove of the driving shaft 10, because the shift block pin 12 is sliding
- the pinion shaft 7 is driven to rotate together with the unipolar rotating permanent magnet assembly in the permanent magnet assembly 6.
- the second speed regulation method is: the disc 17 rotates around the center of the circular hole on the base 14, while the disc 17 slides in the circular arc groove of the disc guide block 16, when the disc 17 is in the circular arc groove
- the disc guide 16 swings to the right and reaches the limit position (at this time the air gap also reaches the minimum position), on the contrary, the disc 17 is at the inflection point under the arc groove
- the disc guide block 16 drives the long connecting rod 15 around the center line b of the pin 23
- the short connecting rod 18 rotates around the center line c of the pin 23, so
- the guide rod 20 can also drive the driven disk assembly to move axially left and right while the guide rod 20 moves back and forth. Move to adjust the size of the air gap between the main and driven disc assembly to achieve speed control.
- the third speed control method is to use the above two speed control methods.
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Abstract
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Claims (7)
- 一种单极磁体旋转式可调速笼型磁力耦合器,其特征在于,所述耦合器由主动盘总成、从动盘总成和轴向移动调速装置组成;主动盘总成包括环形拨块、拨块销、主动轴、大锥齿轮套筒、小锥齿轮,小齿轮轴与永磁体总成,主动轴上套有大齿轮套筒,主动轴右端套有环形拨块,拨块销插在环形拨块上的径向圆形通孔中并且与大齿轮套筒表面斜槽内壁和主动轴表面直槽内壁保持接触配合,主动轴左端通过键与主动盘连接,永磁体总成中包括嵌入安装的永磁体以及单极旋转永磁体总成,其中若干个充磁方向相同的磁体嵌入安装在主动盘左端面的扇形槽中,每两个嵌入安装的磁体之间开有轴向通孔用于安装与其数目相同的单极旋转永磁体,单极旋转永磁体采用轴向充磁且充磁方向与嵌入安装的永磁体相反,从而主动盘上呈N、S极交替的磁体排布方式,单极旋转永磁体与等截面面积的小块轭铁通过结构胶和固化剂粘结安装构成单极磁体旋转总成,小齿轮轴通过单极旋转永磁体与小块轭铁之间的圆孔以及轴向通孔内外表面的径向通孔安装在主动盘的轴向通孔中,小齿轮轴下端装有小锥齿轮与大锥齿轮套筒啮合,单极旋转永磁体以及小块轭铁构成的单极旋转磁体总成可在轴向通孔中绕着小齿轮轴旋转;从动盘总成设有轴向移动调速装置,其包括套筒、导杆、导杆滑块、短连杆、长连杆、底座、圆盘、轴承和圆盘导块,轴承安装在底座孔中,圆盘的轴部分与轴承之间为过盈配合,圆盘绕底座孔转动的同时在表面设有圆弧通槽的圆盘导块中滑动,圆盘导块与长连杆之间通过销钉连接,同时长连杆与底座之间也通过销钉连接,长连杆可以绕销钉转动,长连杆上方小孔通过销钉与短连杆连接,短连杆下方可绕销钉转动,短连杆上方小孔与导杆之间也采用销钉连接,导杆上套有导杆滑块,导杆与从动盘总成之间通过套筒连接,套筒右边内圈与从动轴,左边内孔与导杆之间均为过盈配合连接,因此套筒内圈可带动从动轴轴向移动的同时一起转动,从而从动盘总成在转动的同时又可以进行调速。
- 如权利要求1所述的一种单极磁体旋转式可调速笼型磁力耦合器,其特征在于,从动盘总成包括从动轴、铜盘轭铁和笼型铜盘,从动轴右侧设置有铜盘轭铁与笼型铜盘,铜盘轭铁通过键与从动轴连接,笼型铜盘表面加工有若干扇形槽并与铜盘轭铁上的扇形小凸块配合连接,扇形槽与扇形小凸块为过盈配合,笼型铜盘表面的扇形槽周围产生了感应电流,具体表现为沿着扇形槽形成闭合环形电流;笼型铜盘左边设有轴向移动调速装置。
- 如权利要求1所述的一种单极磁体旋转式可调速笼型磁力耦合器,其特征在于,圆盘导块与长连杆之间通过销钉连接,销钉与圆盘导块与长连杆之间均为过盈配合;长连杆与底座之间也通过销钉连接,销钉与底座之间为过盈配合,与长连杆下方的孔为间隙配合;长连杆上方小孔通过销钉与短连杆连接,销钉与长连杆和短连杆之间分别为过盈配合和间隙配合;短连杆上方小孔与导杆之间也采用销钉连接,销钉与短连杆之间为过盈配合,与导杆之间为间隙配合;导杆上套有导杆滑块,两者之间为间隙配合;导杆与从动盘总成之间通过套筒连接,套筒左侧内孔与导杆之间为过盈配合,套筒右侧内圈同时也与从动盘的从动轴连接,套筒右半部分的内圈与从动轴之间为过盈配合。
- 如权利要求1所述的一种单极磁体旋转式可调速笼型磁力耦合器,其特征在于:所述耦合器的调速方式有三种,第一种是通过轴向移动调速装置调节笼型铜盘与主动盘两者间的气隙大小,该调速方式一般在调速范围较大的时候采用,第二种是固定气隙大小改变单极旋转永磁体总成的转角进而调节笼型铜盘和主动盘之间的正对面积,该调速方式在范围较小的时候采用,第三种是采用轴向移动调速装置调节两盘间的气隙大小与改变旋转永磁体总成的转角的复合调速,该方式可以使调速更精确。
- 如权利要求1所述的一种单极磁体旋转式可调速笼型磁力耦合器,其特征在于:轴向移动装置为摆动导杆机构,圆盘绕着底座孔中心线顺时针转动的同时也在圆盘导块中滑动,当圆盘经过圆盘导块圆弧通槽的上拐点圆弧处开始推程阶段,即气隙变小的过程,在圆弧段时对应停歇阶段,到达圆弧通槽下拐点圆弧处时开始返程阶段,即气隙变大的过程。
- 如权利要求2所述的一种单极磁体旋转式可调速笼型磁力耦合器,其特征在于:所述笼型铜盘表面的扇形槽数目不与主动盘上的磁极数目相等,从而避免较大的转矩波动。
- 如权利要求4所述的一种单极磁体旋转式可调速笼型磁力耦合器,其特征在于:第一种调速方式的原理为:沿着轴向缓慢拨动环形拨块,同时拨块销也在大齿轮套筒的表面斜槽内及主动轴的表面直槽内滑动,由于拨块销在滑动的过程中带动大锥齿轮套筒转动,接着通过大锥齿轮套筒与小锥齿轮的啮合转动进而带动小齿轮轴连同永磁体总成中的单极旋转永磁体总成一起转动,进而改变永磁体总成中单极旋转永磁体总成和笼型铜盘的正对面积以及平均气隙厚度,同时也逐 渐改变永磁体的排布方式,进而完成调速过程;第二种调速方式的原理为:圆盘绕着底座上的圆孔中心转动,同时圆盘在圆盘导块的圆弧通槽中滑动,当圆盘在圆弧通槽中圆弧槽上拐点处的圆弧段滑动的过程中,圆盘导块向右摆动并达到极限位置,此时气隙大小也达到最小的位置,反之圆盘在圆弧槽下拐点处的圆弧段滑动的过程中圆盘导块向左摆动并达到极限位置,此时气隙到达最大的位置;圆盘导块又带动长连杆绕着销钉的中心线转动,同时短连杆绕销钉的中心线转动,从而短连杆拖动导杆沿着固定安装的导杆滑块轴向移动,套筒左边内孔与导杆之间,右边内圈与从动轴之间均为过盈配合,从动轴随内圈一起转动,因此导杆往返运动的同时也能够带动从动盘总成进行轴向的左右移动,从而调节主、从动盘总成间的气隙大小以实现调速。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2100108.6A GB2589782B (en) | 2019-07-15 | 2020-04-30 | Rotary adjustable-speed cage-type magnetic coupler |
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CN112636561B (zh) * | 2020-10-20 | 2022-08-23 | 江苏大学 | 一种单极磁体旋转超导耦合器 |
CN113972810A (zh) * | 2021-09-13 | 2022-01-25 | 江苏大学 | 一种单极永磁体可单独移动的可调速磁力耦合器 |
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CN107370336A (zh) * | 2017-06-19 | 2017-11-21 | 江苏大学 | 一种基于锥齿轮传动的盘式调速磁力耦合器 |
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CN109245487A (zh) * | 2018-11-16 | 2019-01-18 | 安徽理工大学 | 一种新型盘式调速型磁力耦合器 |
CN110504816A (zh) * | 2019-07-15 | 2019-11-26 | 江苏大学 | 一种单极磁体旋转式可调速笼型磁力耦合器 |
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WO2015089759A1 (zh) * | 2013-12-18 | 2015-06-25 | 麦远超 | 可调式导磁盘体组 |
CN107370336A (zh) * | 2017-06-19 | 2017-11-21 | 江苏大学 | 一种基于锥齿轮传动的盘式调速磁力耦合器 |
CN107612273A (zh) * | 2017-09-18 | 2018-01-19 | 安徽沃弗电力科技有限公司 | 一种用于盘式永磁调速器的制动机构 |
CN109245487A (zh) * | 2018-11-16 | 2019-01-18 | 安徽理工大学 | 一种新型盘式调速型磁力耦合器 |
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