CN210744996U

CN210744996U - Belt pulley locked-rotor protection permanent magnet coupler

Info

Publication number: CN210744996U
Application number: CN201921608879.2U
Authority: CN
Inventors: 武运
Original assignee: Shanghai Cet Energy Technology Co ltd
Current assignee: Shanghai Cet Energy Technology Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-06-12
Anticipated expiration: 2029-09-26

Abstract

The utility model discloses a stifled protection permanent magnetism coupler that changes of belt pulley, include: the permanent magnet coupler comprises a locked rotor protection mechanism, two permanent magnet discs and two symmetrically arranged conductor discs, wherein the two permanent magnet discs are symmetrically arranged between the two conductor discs, an air gap is formed between the permanent magnet discs and the conductor discs, and the locked rotor protection mechanism is arranged between the two permanent magnet discs; the left end of the permanent magnet coupler is connected with an expansion sleeve, the right end of the permanent magnet coupler is connected with a coupler, and the right end of the coupler penetrates through the bearing seat and is connected with the belt transmission wheel. The utility model can change the rotating speed according to the requirement of the load system; only 1 part is fixed on a motor shaft, and the radial stress on the motor shaft system is small; the motor rotor has a locked rotor protection function, can effectively deal with the locked rotor condition of load equipment, and protects the motor.

Description

Belt pulley locked-rotor protection permanent magnet coupler

Technical Field

The utility model relates to a permanent magnetism coupling field, more specifically are a belt pulley locked rotor protection permanent magnetism coupling.

Background

The existing similar permanent magnetic coupler belongs to an air cooling disc type structure and is mainly used for belt pulley transmission equipment, such as an oil pumping unit in an oil field. The main components comprise 2 conductor discs, 1 permanent magnet disc and 1 belt pulley assembly, wherein the 2 conductor discs are fixed together through air gap columns in a butt-clamping mode to form an outer rotor of the permanent magnet coupler, and the 1 conductor disc and the belt pulley assembly are assembled together to form an inner rotor component of the permanent magnet coupler. The permanent magnet coupler is directly inserted into a motor shaft and fixed on the motor through the expansion sleeve, the motor drives the belt pulley to rotate when rotating, and the belt pulley drives the load equipment to run through belt transmission power.

At present, the existing permanent magnet coupler has the following problems: (1) the belt pulley and the permanent magnetic coupler are integrated, and a plurality of permanent magnetic couplers are required to be arranged to meet different rotating speed requirements of a system, so that the use cost and the maintenance cost of a user are increased; (2) the permanent magnet coupler is directly arranged on a motor shaft, and the radial stress of a motor shaft system is large, so that the service life of the motor is influenced; (3) the motor can not be effectively protected against the locked-rotor condition of the load equipment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stifled protection permanent magnetism coupling that changes of belt pulley has solved the problem that proposes in the background art, satisfies the in-service use demand.

In order to achieve the above object, the utility model provides a following technical scheme: a pulley locked-rotor protection permanent magnet coupler comprises: the permanent magnet coupler comprises a locked rotor protection mechanism, two permanent magnet discs and two symmetrically arranged conductor discs, wherein the two permanent magnet discs are symmetrically arranged between the two conductor discs, an air gap is formed between the permanent magnet discs and the conductor discs, and the locked rotor protection mechanism is arranged between the two permanent magnet discs; the left end of the permanent magnet coupler is connected with an expansion sleeve, the right end of the permanent magnet coupler is connected with a coupler, and the right end of the coupler penetrates through the bearing seat and is connected with the belt transmission wheel.

As an optimal implementation mode of the utility model, the minimum size of air gap is 3.2mm, be provided with the stopper in the air gap, stopper and permanent magnetism dish fixed connection, and the width of stopper is 3.2 mm.

As an embodiment of the utility model, two be provided with the connecting plate between the conductor dish, the connecting plate both ends set up respectively in the edge of two conductor dishes, and adopt bolted connection between connecting plate and the conductor dish, the connecting plate outer wall is the arc.

Compared with the prior art, the beneficial effects of the utility model are as follows:

(1) the belt pulley of the permanent magnet coupler is arranged on the bearing seat and is separated from the permanent magnet coupler main body on the motor. When the user changes the rotational speed as required, as long as change the belt pulley of different models can, need not change the permanent magnet coupling main part, it is simple and convenient to change the belt pulley wheel operation, need not remove the motor and change the permanent magnet coupling main part, effectively reduces user use cost and maintenance cost.

(2) The belt pulley and the bearing seat of the permanent magnet coupler are independently installed, and radial force generated by the belt pulley is borne by the bearing seat when equipment runs, so that additional radial force cannot be generated on a motor shaft, the influence on the motor is reduced to the minimum, and the service life of the motor is prolonged.

(3) The permanent magnet coupler has the function of locked rotor protection. If the load equipment is locked or heavily overloaded, the locked protection mechanism will act to make the air gap between the permanent magnetic disk and the conductor disk maximum, the induction magnetic field is minimized, and at this moment, the motor works in a similar light load state, and no overcurrent phenomenon occurs, so that the motor is prevented from being damaged due to locked or heavily overloaded, the motor can be effectively protected, and the service life of the motor is prolonged.

Drawings

Fig. 1 is a structural diagram of a belt pulley locked-rotor protection permanent magnet coupler according to the present invention;

fig. 2 is a structural diagram of a permanent magnet coupler of the same type currently on the market.

In the figure, a permanent magnet coupler 1; a permanent magnet disk 11; a locked-rotor protection mechanism 12; a conductor disc 13; an air gap 14; a stopper 15; a connecting plate 16; an expansion sleeve 2; a coupler 3; a bearing seat 4; a belt transmission wheel 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a pulley locked-rotor protection permanent magnet coupler comprises: the permanent magnet coupler comprises a permanent magnet coupler 1, a bearing seat 4 and a belt transmission wheel 5, wherein the permanent magnet coupler 1 comprises a locked-rotor protection mechanism 12, two permanent magnet discs 11 and two conductor discs 13 which are symmetrically arranged, the two permanent magnet discs 11 are symmetrically arranged between the two conductor discs 13, an air gap 14 is formed between the permanent magnet discs 11 and the conductor discs 13, the locked-rotor protection mechanism 12 is arranged between the two permanent magnet discs 11, when locked-rotor or serious overload occurs to load equipment, the locked-rotor protection mechanism 12 can act to enable the air gap 14 between the permanent magnet discs 11 and the conductor discs 13 to be maximum, an induced magnetic field is reduced to be minimum, at the moment, the motor works in a similar light-load state, an overcurrent phenomenon cannot occur, the motor is prevented from being damaged due to locked-rotor or serious overload, the motor can be effectively protected, and the service life; the left end of the permanent magnet coupler 1 is connected with the expansion sleeve 2, the permanent magnet coupler 1 is connected with the power output end of the motor through the expansion sleeve 2, additional radial force can not be generated on a motor shaft, the influence on the motor is reduced to the minimum, the service life of the motor is prolonged, the right end of the permanent magnet coupler 1 is connected with the coupler 3, the right end of the coupler 3 penetrates through the bearing seat 4 and is connected with the belt driving wheel 5, a belt pulley is installed on the bearing seat 4 and is separated from the main body of the permanent magnet coupler 1, when the rotating speed of a user needs to be changed, only the belt driving wheels 5 of different models need to be changed, the main body of the permanent magnet coupler 1 does not need to be changed, the operation of the belt driving wheel 5 is simple and convenient, the motor.

Further improved, as shown in fig. 1: the minimum size of the air gap 14 is 3.2mm, a limiting block 15 is arranged in the air gap 14, the limiting block 15 is fixedly connected with the permanent magnet disc 11, the width of the limiting block 15 is 3.2mm, when the air gap is 3.2mm, magnetic lines of force between the conductor disc and the permanent magnet disc are distributed most densely, an induction magnetic field is also maximum, and at the moment, the permanent magnet coupler can achieve maximum transmission rotating speed output.

Specifically, be provided with connecting plate 16 between two conductor dish 13, connecting plate 16 both ends set up respectively in the edge of two conductor dish 13, and adopt bolted connection between connecting plate 16 and the conductor dish 13, and the outer wall of connecting plate 16 is the arc, and it is comparatively convenient to install and dismantle.

The working principle is as follows: when the motor rotates, the conductor disc 13 cuts magnetic lines of force of the permanent magnet disc 11 installed on the load device, nest current is generated on the conductor disc 13 to form an induction magnetic field, and the permanent magnet disc 11 installed on the load device is driven to rotate and transmit torque. When the distance between the conductor disc 13 and the permanent magnet disc 11 is 3.2mm (minimum air gap), the magnetic force lines between the conductor disc 13 and the permanent magnet disc 11 are distributed most densely, the induction magnetic field is also maximum, the permanent magnet coupler 1 can achieve maximum transmission rotating speed output at the moment, if a load device is locked up or seriously overloaded, the locked-up protection mechanism 12 of the permanent magnet coupler 1 acts, the air gap 14 between the permanent magnet disc 11 and the conductor disc 13 is maximum, the induction magnetic field is reduced to the minimum, the transmission rotating speed of the permanent magnet coupler 1 is small at the moment, the motor is in an idle load or light load state, the motor is protected from being operated by over current, and the service life of the motor is prolonged. After the motor is powered off and stops rotating, the locked rotor protection mechanism 12 is restored to the original state, and the air gap 14 between the conductor disc 13 and the permanent magnet disc 11 is restored to be about 3.2mm, so that the motor can be started again after overload or serious overload is eliminated. If the rotating speed of the load equipment needs to be adjusted, only the belt driving wheels 5 of different types need to be replaced, the main body of the permanent magnet coupler 1 does not need to be disassembled or replaced, the user only needs to be provided with the belt driving wheels 5 of different types to meet the requirements of different rotating speeds of the load equipment, the main body of the permanent magnet coupler 1 does not need to be provided, and the spare part cost and the use cost of the user can be greatly saved.

The product protected by the scheme is put into practical production and application at present, and particularly has certain success in the field of permanent magnet couplers, so that the technical scheme of the product is obviously proved to be beneficial, meets social requirements, and is suitable for batch production and popularization and use.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pulley locked-rotor protection permanent magnet coupler comprises: permanent magnetism coupler (1), bearing frame (4) and belt drive wheel (5), its characterized in that: the permanent magnet coupler (1) comprises a locked rotor protection mechanism (12), two permanent magnet discs (11) and two symmetrically arranged conductor discs (13), wherein the two permanent magnet discs (11) are symmetrically arranged between the two conductor discs (13), an air gap (14) is formed between each permanent magnet disc (11) and each conductor disc (13), and the locked rotor protection mechanism (12) is arranged between the two permanent magnet discs (11);

the left end of the permanent magnet coupler (1) is connected with an expansion sleeve (2), the right end of the permanent magnet coupler (1) is connected with a coupler (3), and the right end of the coupler (3) penetrates through a bearing seat (4) and is connected with a belt transmission wheel (5).

2. The pulley stalling protection permanent magnet coupler of claim 1, wherein: the minimum size of air gap (14) is 3.2mm, be provided with stopper (15) in air gap (14), stopper (15) and permanent magnetism dish (11) fixed connection, and the width of stopper (15) is 3.2 mm.

3. The pulley stalling protection permanent magnet coupler of claim 1, wherein: two be provided with connecting plate (16) between conductor dish (13), connecting plate (16) both ends set up respectively in the edge of two conductor dishes (13), and adopt bolted connection between connecting plate (16) and conductor dish (13), connecting plate (16) outer wall is the arc.