CN216252501U

CN216252501U - Magnetic vibration absorption coupling and rotating equipment

Info

Publication number: CN216252501U
Application number: CN202121825934.0U
Authority: CN
Inventors: 袁昊; 陈悦; 庞靖; 李敬豪; 邢海波; 司翔宇; 张辉; 刘海东; 李建华; 章正林; 蒋寻寒
Original assignee: Datang Boiler Pressure Vessel Examination Center Co Ltd; East China Electric Power Test Institute of China Datang Corp Science and Technology Research Institute Co Ltd
Current assignee: Datang Boiler Pressure Vessel Examination Center Co Ltd; East China Electric Power Test Institute of China Datang Corp Science and Technology Research Institute Co Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-04-08
Anticipated expiration: 2031-08-05

Abstract

The utility model discloses a magnetic vibration absorption coupler and rotating equipment, and relates to the field of couplers, wherein the magnetic vibration absorption coupler comprises a driving shaft connecting piece, an elastic mechanism, a driven shaft connecting piece and a magnetic mechanism; the elastic mechanism is fixedly connected to the driving shaft connecting piece, and the driven shaft connecting piece is fixedly connected with the elastic mechanism; the magnetic mechanism can transmit torque between the driving shaft connecting piece and the driven shaft connecting piece through magnetic force, the torsional rigidity of the elastic mechanism is positive, and the torsional rigidity of the magnetic mechanism is negative; the magnetic force of the magnetic mechanism can be adjusted. The utility model has the advantages that: the transmission efficiency is high, and the transmission efficiency can be adjusted; the method of fixing the elastic mechanism and the magnetic mechanism effectively reduces the mutual transmission of vibration and ensures the safety and stability of the equipment.

Description

Magnetic vibration absorption coupling and rotating equipment

Technical Field

The utility model relates to the field of couplings, in particular to a magnetic vibration absorption coupling and rotary equipment.

Background

The shaft coupling is widely used in various rotary machines to connect a driving shaft and a driven shaft in different equipment mechanisms to rotate together to transmit torque. The traditional coupler is a contact coupler, torque must be transmitted through the connection of a back wheel between a driving shaft and a driven shaft, the structure is complex, the manufacturing precision is high, and parts are easily damaged during overload. Especially, when the unbalanced mass problem appears in shaft coupling department, lead to the vibration grow of whole rotor, and shaft coupling department is difficult to carry out dynamic balance and aggravates, can only carry out dynamic balance to driving shaft or transmission shaft department equipment, not only inefficiency, dynamic balance precision is lower moreover.

To overcome the above-mentioned drawbacks of conventional couplings, magnetic couplings have appeared in the prior art. The magnetic coupling belongs to a non-contact coupling, and is characterized in that the magnetic coupling breaks through the structural form of the traditional coupling, adopts a brand-new magnetic coupling principle, realizes the transmission of force and torque between a driving shaft and a driven shaft without direct contact, can change dynamic seal into static seal, and realizes zero leakage, so that the magnetic coupling is widely applied to occasions with special requirements on leakage.

Magnetic coupling among the prior art mainly is plane magnetic coupling, generally includes relative parallel first group permanent magnet and second group permanent magnet, first group permanent magnet and drive shaft connection, and second group permanent magnet group is connected with the driven shaft, can drive the whole rotation of first group permanent magnet group when the drive shaft rotates, and under the magnetic force effect, the second group permanent magnet group can follow first group permanent magnet group synchronous rotation to can realize the transmission between drive shaft and the driven shaft. Patent CN212811481U discloses a coupling with high transmission reliability, which comprises a coupling body, wherein the coupling body comprises a power input end, an inner rotor, an outer rotor, a load end, and a permanent magnet; the inner rotor is connected with the power input end, the power input end is connected with the motor, the outer rotor is connected with the load end, and the inner rotor is arranged in the outer rotor; permanent magnets with the same magnetic pole pairs are uniformly distributed on the outer cylindrical surface of the inner rotor and the inner cylindrical surface of the outer rotor. The problems of the existing magnetic transmission coupling include: the transmission torque is too small, and the torque cannot be adjusted, so that the transmission efficiency of the coupler is low, and the transmission efficiency cannot be adjusted; the mutual transmission of vibration cannot be reduced; the installation is difficult and easy to damage, and large vibration is easy to generate due to the installation problem; the vibration cannot be adjusted, and the buffering and vibration damping effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a magnetic vibration absorption coupler and rotating equipment which are high in transmission efficiency and capable of adjusting the transmission efficiency.

The utility model solves the technical problems through the following technical means: the magnetic vibration absorption coupler comprises a driving shaft connecting piece (1), an elastic mechanism (2), a driven shaft connecting piece (3) and a magnetic mechanism (4); the elastic mechanism (2) is fixedly connected to the driving shaft connecting piece (1), and the driven shaft connecting piece is fixedly connected with the elastic mechanism (2) of the driving shaft connecting piece (3); the magnetic mechanism (4) can transmit torque between the driving shaft connecting piece (1) and the driven shaft connecting piece (3) through magnetic force, the torsional rigidity of the elastic mechanism (2) is positive, and the torsional rigidity of the magnetic mechanism (4) is negative; the magnetic force of the magnetic mechanism (4) can be adjusted. The driving shaft connecting piece drives the driven shaft connecting piece to rotate through the elastic mechanism, and the driving torque is only provided by the elastic mechanism, so that the torque is ensured, and the transmission efficiency is high; the moment of the magnetic mechanism at the balance position is zero, and the transmission torque of the magnetic vibration absorption coupler can be adjusted by adjusting the magnetic force of the magnetic mechanism, so that the transmission efficiency is adjusted; by adopting the method of fixing the elastic mechanism and the magnetic mechanism, the elastic mechanism can reduce vibration, and the magnetic force of the magnetic mechanism can also achieve the effect of vibration absorption, so that the mutual transmission of vibration is effectively reduced, and the safety and stability of equipment are guaranteed.

As the technical scheme who optimizes, the inside of initiative shaft connecting piece (1) is equipped with the installation cavity, elastic mechanism (2), magnetic mechanism (4) all are located in the installation cavity, elastic mechanism (2) fixed connection be in on the inner wall of initiative shaft connecting piece (1), follow driven shaft connecting piece (3) follow the one end of initiative shaft connecting piece (1) penetrates in the installation cavity, penetrate driven shaft connecting piece (3) one end in the installation cavity with elastic mechanism (2) fixed connection, the lateral wall and the terminal surface of driven shaft connecting piece (3) with leave the space between the inner wall of initiative shaft connecting piece (1).

As an optimized technical scheme, the magnetic mechanism (4) comprises an outer magnetic ring (41) and an inner magnetic ring (42); the outer magnetic ring (41) is positioned in the mounting cavity and fixedly connected to the inner wall of the driving shaft connecting piece (1), the outer magnetic ring (41) comprises a plurality of outer magnetic ring electromagnets, and the outer magnetic ring electromagnets are arranged at intervals along the circumference; the inner magnetic ring (42) is fixedly connected to the outer ring of the driven shaft connecting piece (3), the inner magnetic ring (42) comprises a plurality of inner magnetic ring electromagnets, and the inner magnetic ring electromagnets are arranged at intervals along the circumference; the outer magnetic ring (41) surrounds the outer ring of the inner magnetic ring (42) and a gap is reserved between the outer magnetic ring and the inner magnetic ring (42); each outer magnetic ring electromagnet corresponds to each inner magnetic ring electromagnet one by one, and the magnetism of the adjacent parts of each outer magnetic ring electromagnet and each inner magnetic ring electromagnet is opposite. The outer magnetic ring and the inner magnetic ring are combined, and the magnetic force of the magnetic mechanism can be adjusted by adjusting the current, so that the transmission torque of the coupler can be adjusted, and the vibration is reduced; when the driven shaft of rotary equipment takes place because of the vibration that the unbalanced mass arouses, can be through measuring, obtain the unbalanced mass position of magnetic vibration absorption shaft coupling, the magnetic force intensity of the interior magnetic ring electro-magnet of this position is increased through the current strength of the opposite position of the unbalanced mass position on the control magnetic mechanism to offset the vibration problem that the unbalanced mass arouses, reduce vibration, can be when normal operating, carry out dynamic balance under the non-stop condition and handle, conveniently adjust the dynamic balance precision, be convenient for carry out the dynamic balance experiment.

As an optimized technical scheme, all the external magnetic ring electromagnets and the internal magnetic ring electromagnets are strip-shaped, all the external magnetic ring electromagnets are arranged at equal intervals along the circumference, and all the internal magnetic ring electromagnets are arranged at equal intervals along the circumference.

As an optimized technical scheme, the other end, opposite to one end penetrated by the driven shaft connecting piece (3), of the driving shaft connecting piece (1) is provided with a first connecting groove, and the other end, opposite to one end penetrated by the driven shaft connecting piece (3), of the driven shaft connecting piece (3) is provided with a second connecting groove. The shaft coupling can pass through pin key fixed connection with the driving shaft of rotary equipment, driven shaft, and the mounting means is simple and convenient.

As an optimized technical scheme, the magnetic vibration absorption coupler further comprises a first bearing (5), a bearing mounting hole is formed in one end, penetrating into the driving shaft connecting piece (1), of the driven shaft connecting piece (3), the first bearing (5) is fixedly connected into the bearing mounting hole, the driven shaft connecting piece (3) penetrates into the mounting cavity from a center hole of the first bearing (5), and the driven shaft connecting piece (3) is fixedly connected into the center hole of the first bearing (5).

According to the optimized technical scheme, the cross section of the elastic mechanism (2) is in a fan blade shape, a fan blade-shaped connecting hole (21) is formed in the center of the elastic mechanism (2), the driven shaft connecting piece (3) penetrates into the connecting hole (21) and is fixedly connected with the inner ring of the connecting hole (21), and the cross section of the part, located in the connecting hole (21), of the driven shaft connecting piece (3) is in a fan blade shape.

The rotating equipment comprises the magnetic vibration absorption coupler, a driving shaft (6), a motor (7), a driven shaft (9) and a rotor (10); one end of the driving shaft (6) is fixedly connected with the motor (7), and the other end of the driving shaft is fixedly connected with the driving shaft connecting piece (1); one end of the driven shaft (9) is fixedly connected with the driven shaft connecting piece (3), and the other end of the driven shaft is fixedly connected with the rotor (10). When the motor rotates, the driving shaft is driven to rotate, so that the driving shaft connecting piece is driven to rotate, the driving shaft connecting piece drives the driven shaft connecting piece to rotate through the elastic mechanism, so that the driven shaft is driven to rotate, the rotor is finally driven to rotate, the driving torque is only provided by the elastic mechanism, the torque is ensured, and the transmission efficiency is high; the moment of the magnetic mechanism at the balance position is zero, and the transmission torque of the magnetic vibration absorption coupler can be adjusted by adjusting the magnetic force of the magnetic mechanism, so that the transmission efficiency is adjusted; by adopting the method of fixing the elastic mechanism and the magnetic mechanism, the elastic mechanism can reduce vibration, and the magnetic force of the magnetic mechanism can also achieve the effect of vibration absorption, thereby effectively reducing the mutual transmission of vibration.

As an optimized technical scheme, a first connecting groove is formed in the driving shaft connecting piece (1), and the driving shaft (6) penetrates into the first connecting groove and is fixedly connected with the driving shaft connecting piece (1) through a first pin key; and a second connecting groove is formed in the driven shaft connecting piece (3), and the driven shaft (9) penetrates into the second connecting groove and is fixedly connected with the driven shaft connecting piece (3) through a second pin key. The shaft coupling is respectively through first round pin key, second round pin key fixed connection with driving shaft, driven shaft, and the mounting means is simple and convenient.

As an optimized technical scheme, the rotating equipment further comprises a second bearing (8) and a third bearing (11); the second bearing (8) is fixedly connected to the position where the middle of the driving shaft (6) passes through, and the middle of the driving shaft (6) penetrates through the central hole of the second bearing (8) and is fixedly connected with the second bearing (8); the third bearing (11) is fixedly connected to the position where the middle part of the driven shaft (9) passes through, and the middle part of the driven shaft (9) penetrates through the central hole of the third bearing (11) and is fixedly connected with the third bearing (11).

The utility model has the advantages that:

1. the driving torque is provided only by the elastic mechanism, so that the torque is ensured, and the transmission efficiency is high; the moment of the magnetic mechanism at the balance position is zero, and the transmission torque of the coupler can be adjusted by adjusting the magnetic force of the magnetic mechanism, so that the transmission efficiency is adjusted.

2. By adopting the method of fixing the elastic mechanism and the magnetic mechanism, the elastic mechanism can reduce vibration, and the magnetic force of the magnetic mechanism can also achieve the effect of vibration absorption, so that the mutual transmission of vibration is effectively reduced, and the safety and stability of equipment are guaranteed.

3. The coupler is not easy to damage, and the installation mode is simple and convenient.

4. The current intensity of the opposite position of the unbalanced mass on the magnetic mechanism is controlled to increase the magnetic force intensity of the inner magnetic ring electromagnet at the position, so that the vibration problem caused by the unbalanced mass can be offset, the vibration is reduced, the dynamic balance treatment can be carried out without stopping the machine during normal operation, the dynamic balance precision is conveniently adjusted, and the dynamic balance test is convenient to carry out.

Drawings

Fig. 1 is a schematic structural diagram of a magnetic vibration absorption coupling according to an embodiment of the present invention.

Fig. 2 is a schematic sectional view taken along the line a-a of the magnetic vibration-absorbing coupling according to the embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of the magnetic vibration absorbing coupling according to an embodiment of the present invention taken along the line B-B.

Fig. 4 is a schematic structural diagram of an elastic mechanism according to an embodiment of the present invention.

FIG. 5 is a schematic structural view of a driven shaft coupling according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a rotating apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, the magnetic vibration absorption coupling includes a driving shaft connector 1, an elastic mechanism 2, a driven shaft connector 3, a magnetic mechanism 4, and a first bearing 5.

As shown in fig. 1, a driving shaft connecting piece 1 is made of aluminum, and an installation cavity is arranged inside the driving shaft connecting piece 1; the elastic mechanism 2 is made of rubber, and the elastic mechanism 2 is positioned in the mounting cavity and is fixedly connected to the inner wall of the driving shaft connecting piece 1; the driven shaft connecting piece 3 is made of aluminum, the driven shaft connecting piece 3 penetrates into the mounting cavity from one end of the driving shaft connecting piece 1, and one end, penetrating into the mounting cavity, of the driven shaft connecting piece 3 is fixedly connected with the elastic mechanism 2; gaps are reserved between the side wall and the end face of the driven shaft connecting piece 3 and the inner wall of the driving shaft connecting piece 1, and the end face of one end, penetrating into the mounting cavity, of the driven shaft connecting piece 3 is separated from the inner wall of the driving shaft connecting piece 1 by about 3 mm; the magnetic mechanism 4 is arranged in the installation cavity, the magnetic mechanism 4 can transmit torque between the driving shaft connecting piece 1 and the driven shaft connecting piece 3 through magnetic force, the torsional rigidity of the elastic mechanism 2 is positive, and the torsional rigidity of the magnetic mechanism 4 is negative; the magnetic force of the magnetic mechanism 4 can be adjusted.

As shown in fig. 2, the cross section of the elastic mechanism 2 is fan-shaped, and a fan-shaped connection hole 21 is formed in the center of the elastic mechanism 2.

As shown in fig. 3 and 4, one end of the driven shaft connecting piece 3 penetrating into the mounting cavity penetrates into the connecting hole 21 and is fixedly connected with the inner ring of the connecting hole 21, and the cross section of the part of the driven shaft connecting piece 3 positioned in the connecting hole 21 is in a fan blade shape.

As shown in fig. 1 and 5, the magnetic mechanism 4 includes an outer magnetic ring 41 and an inner magnetic ring 42; the outer magnetic ring 41 is arranged in the installation cavity and fixedly connected to the inner wall of the driving shaft connecting piece 1 through clamping or bonding, the outer magnetic ring 41 comprises a plurality of strip-shaped outer magnetic ring electromagnets, and the outer magnetic ring electromagnets are arranged at equal intervals along the circumference; the inner magnetic ring 42 is fixedly connected to the outer ring of the driven shaft connecting piece 3 through clamping or bonding, the inner magnetic ring 42 comprises a plurality of strip-shaped inner magnetic ring electromagnets, and the inner magnetic ring electromagnets are arranged at equal intervals along the circumference; the outer magnetic ring 41 surrounds the outer ring of the inner magnetic ring 42 and a gap is reserved between the outer magnetic ring 41 and the inner magnetic ring 42, and the distance between the outer magnetic ring 41 and the inner magnetic ring 42 is about 10 mm; each outer magnetic ring electromagnet corresponds to each inner magnetic ring electromagnet one by one, and the magnetism of the adjacent parts of each outer magnetic ring electromagnet and each inner magnetic ring electromagnet is opposite; the magnetic mechanism 4 can transmit torque between the driving shaft connecting piece 1 and the driven shaft connecting piece 3 through magnetic force between the outer magnetic ring 41 and the inner magnetic ring 42, and the magnetic force of the magnetic mechanism 4 can be adjusted through controlling the current intensity.

As shown in fig. 1, a bearing mounting hole is formed in one end, which is located on the driving shaft connecting piece 1 and is penetrated by the driven shaft connecting piece 3, of the driving shaft connecting piece, the first bearing 5 is fixedly connected to the bearing mounting hole, the driven shaft connecting piece 3 penetrates into the mounting cavity from a center hole of the first bearing 5, and the driven shaft connecting piece 3 is fixedly connected to a center hole of the first bearing 5.

As shown in fig. 6, the rotating device includes the magnetic vibration absorption coupling, and further includes a driving shaft 6, a motor 7, a second bearing 8, a driven shaft 9, a rotor 10, and a third bearing 11.

One end of the driving shaft 6 is fixedly connected with the motor 7, and the other end of the driving shaft is fixedly connected with the driving shaft connecting piece 1; the other end of the driving shaft connecting piece 1, which is opposite to the end where the driven shaft connecting piece 3 penetrates, is provided with a first connecting groove, and the driving shaft 6 penetrates into the first connecting groove and is fixedly connected with the driving shaft connecting piece 1 through a first pin key; the second bearing 8 is fixedly connected to the position where the middle part of the driving shaft 6 passes through, and the middle part of the driving shaft 6 passes through the central hole of the second bearing 8 and is fixedly connected with the second bearing 8.

One end of the driven shaft 9 is fixedly connected with the driven shaft connecting piece 3, and the other end of the driven shaft is fixedly connected with the rotor 10; the other end of the driven shaft connecting piece 3, which is opposite to the end penetrating into the mounting cavity, is provided with a second connecting groove, and the driven shaft 9 penetrates into the second connecting groove and is fixedly connected with the driven shaft connecting piece 3 through a second pin key; the third bearing 11 is fixedly connected to a position where the middle part of the driven shaft 9 passes through, and the middle part of the driven shaft 9 passes through a center hole of the third bearing 11 and is fixedly connected with the third bearing 11.

The working principle of the utility model is as follows: when the motor 7 rotates, the driving shaft 6 is driven to rotate, so that the driving shaft connecting piece 1 is driven to rotate, the driving shaft connecting piece 1 drives the driven shaft connecting piece 3 to rotate through the elastic mechanism 2, so that the driven shaft 9 is driven to rotate, the rotor 10 is finally driven to rotate, the driving torque is only provided by the elastic mechanism 2, the torque is ensured, and the transmission efficiency is high; the moment of the magnetic mechanism 4 at the balance position is zero, and the transmission torque of the magnetic vibration absorption coupler can be adjusted by adjusting the magnetic force of the magnetic mechanism 4, so that the transmission efficiency is adjusted; by adopting the method of fixing the elastic mechanism 2 and the magnetic mechanism 4, the elastic mechanism 2 can reduce vibration, and the magnetic force of the magnetic mechanism 4 can also achieve the effect of vibration absorption, thereby effectively reducing the mutual transmission of vibration.

When the driven shaft 9 takes place because of the vibration that the unbalanced mass arouses, can be through measuring, obtain the unbalanced mass position of the coupling is inhaled to magnetism, the magnetic force intensity of the interior magnetic ring electro-magnet of this position is increased through the current strength that lies in the opposite position of the unbalanced mass position on control magnetic mechanism 4 to offset the vibration problem that the unbalanced mass arouses, reduce vibration, can be when normal operating, carry out dynamic balance under the non-stop condition and handle, conveniently adjust the dynamic balance precision, be convenient for carry out the dynamic balance experiment.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A magnetic vibration absorption coupler is characterized in that: comprises a driving shaft connecting piece (1), an elastic mechanism (2), a driven shaft connecting piece (3) and a magnetic mechanism (4); the elastic mechanism (2) is fixedly connected to the driving shaft connecting piece (1), and the driven shaft connecting piece (3) is fixedly connected with the elastic mechanism (2); the magnetic mechanism (4) can transmit torque between the driving shaft connecting piece (1) and the driven shaft connecting piece (3) through magnetic force, the torsional rigidity of the elastic mechanism (2) is positive, and the torsional rigidity of the magnetic mechanism (4) is negative; the magnetic force of the magnetic mechanism (4) can be adjusted.

2. The magnetic vibration-absorbing coupling of claim 1, wherein: the inside of initiative shaft connecting piece (1) is equipped with the installation cavity, elastic mechanism (2), magnetic mechanism (4) all are located in the installation cavity, elastic mechanism (2) fixed connection be in on the inner wall of initiative shaft connecting piece (1), follow from shaft connecting piece (3) the one end of initiative shaft connecting piece (1) penetrates in the installation cavity, penetrate from shaft connecting piece (3) one end in the installation cavity with elastic mechanism (2) fixed connection, the lateral wall and the terminal surface of from shaft connecting piece (3) with leave the space between the inner wall of initiative shaft connecting piece (1).

3. The magnetic vibration-absorbing coupling of claim 2, wherein: the magnetic mechanism (4) comprises an outer magnetic ring (41) and an inner magnetic ring (42); the outer magnetic ring (41) is positioned in the mounting cavity and fixedly connected to the inner wall of the driving shaft connecting piece (1), the outer magnetic ring (41) comprises a plurality of outer magnetic ring electromagnets, and the outer magnetic ring electromagnets are arranged at intervals along the circumference; the inner magnetic ring (42) is fixedly connected to the outer ring of the driven shaft connecting piece (3), the inner magnetic ring (42) comprises a plurality of inner magnetic ring electromagnets, and the inner magnetic ring electromagnets are arranged at intervals along the circumference; the outer magnetic ring (41) surrounds the outer ring of the inner magnetic ring (42) and a gap is reserved between the outer magnetic ring and the inner magnetic ring (42); each outer magnetic ring electromagnet corresponds to each inner magnetic ring electromagnet one by one, and the magnetism of the adjacent parts of each outer magnetic ring electromagnet and each inner magnetic ring electromagnet is opposite.

4. The magnetic vibration-absorbing coupling of claim 3, wherein: all the outer magnetic ring electromagnets and the inner magnetic ring electromagnets are strip-shaped, all the outer magnetic ring electromagnets are arranged at equal intervals along the circumference, and all the inner magnetic ring electromagnets are arranged at equal intervals along the circumference.

5. The magnetic vibration-absorbing coupling of claim 2, wherein: the driving shaft connecting piece (1) is provided with a first connecting groove at the other end opposite to the end penetrated by the driven shaft connecting piece (3), and the driven shaft connecting piece (3) is provided with a second connecting groove at the other end opposite to the end penetrated by the driven shaft connecting piece.

6. The magnetic vibration-absorbing coupling of claim 2, wherein: the magnetic vibration absorption coupler further comprises a first bearing (5), a bearing mounting hole is formed in one end, penetrating into the bearing mounting hole, of the driving shaft connecting piece (1) located through the driven shaft connecting piece (3), the first bearing (5) is fixedly connected into the bearing mounting hole, the driven shaft connecting piece (3) penetrates into the mounting cavity from a center hole of the first bearing (5), and the driven shaft connecting piece (3) is fixedly connected into the center hole of the first bearing (5).

7. The magnetic vibration-absorbing coupling of claim 1, wherein: the cross section of the elastic mechanism (2) is in a fan blade shape, a fan blade-shaped connecting hole (21) is formed in the center of the elastic mechanism (2), the driven shaft connecting piece (3) penetrates into the connecting hole (21) and is fixedly connected with the inner ring of the connecting hole (21), and the cross section of the part, located in the connecting hole (21), of the driven shaft connecting piece (3) is in a fan blade shape.

8. A rotary apparatus characterized by: magnetic shock-absorbing coupling comprising according to any of claims 1-7, further comprising a drive shaft (6), a motor (7), a driven shaft (9), a rotor (10); one end of the driving shaft (6) is fixedly connected with the motor (7), and the other end of the driving shaft is fixedly connected with the driving shaft connecting piece (1); one end of the driven shaft (9) is fixedly connected with the driven shaft connecting piece (3), and the other end of the driven shaft is fixedly connected with the rotor (10).

9. The rotary apparatus as claimed in claim 8, wherein: the driving shaft connecting piece (1) is provided with a first connecting groove, and the driving shaft (6) penetrates into the first connecting groove and is fixedly connected with the driving shaft connecting piece (1) through a first pin key; and a second connecting groove is formed in the driven shaft connecting piece (3), and the driven shaft (9) penetrates into the second connecting groove and is fixedly connected with the driven shaft connecting piece (3) through a second pin key.

10. The rotary apparatus as claimed in claim 8, wherein: the rotating equipment also comprises a second bearing (8) and a third bearing (11); the second bearing (8) is fixedly connected to the position where the middle of the driving shaft (6) passes through, and the middle of the driving shaft (6) penetrates through the central hole of the second bearing (8) and is fixedly connected with the second bearing (8); the third bearing (11) is fixedly connected to the position where the middle part of the driven shaft (9) passes through, and the middle part of the driven shaft (9) penetrates through the central hole of the third bearing (11) and is fixedly connected with the third bearing (11).