CN104734401A - Radial magnetic circuit monopole slotless decelerating type motor protector - Google Patents

Abstract

The utility model relates to a radial magnetic circuit unipolar non-cogging reduction type motor protector, which belongs to the technical field of motor protection equipment. In order to solve the current problems of motor maintenance cost increase due to the lack of motor protectors, the performance and life of the motor are reduced. The permanent magnet (3) is disc-shaped, and the disc-shaped permanent magnet (3) is fixed in the non-magnetic stainless steel sleeve (1), and the magnetic circuit of the disc-shaped permanent magnet (3) is along the radial direction Setting, the two circular magnetically conductive stainless steel baffles (2) are fixed at both ends of the non-magnetically conductive stainless steel sleeve (1), and the circular magnetically conductive stainless steel baffles (2) and the disc-shaped permanent magnet The two end faces of (3) are close to each other, and the middle parts of the two circular magnetically conductive stainless steel baffles (2) are respectively provided with shaft holes, and the disc-shaped permanent magnet (3) is also provided with shaft holes. The disk-shaped permanent magnet (3) is arranged coaxially with the shaft holes of the two circular magnetically permeable stainless steel baffles (2). The invention is used in motor protection occasions.

Description

Radial magnetic circuit unipolar non-cogging reduction motor protector

technical field

The invention relates to a motor protector, which belongs to the technical field of motor protection equipment.

Background technique

The iron filings and other impurities produced by the friction of the reduction mechanism (such as the reducer) have an important impact on the long-term effective operation of the permanent magnet synchronous motor (hereinafter referred to as the motor). It will also have adverse effects, which will not only increase the maintenance cost of the motor, but also seriously affect the service life of the motor. Therefore, how to reduce impurities such as iron filings from entering the motor body, effectively improve the performance and life of the motor, and reduce the maintenance cost of the motor is an urgent problem to be solved at present.

Contents of the invention

The purpose of the present invention is to provide a radial magnetic circuit unipolar non-cogging reduction motor protector to solve the current problem that the performance and life of the motor will be reduced and the maintenance cost of the motor will be increased due to the lack of a motor protector.

Technical scheme of the present invention is :

Radial magnetic circuit unipolar non-cogging reduction motor protector, said radial magnetic circuit unipolar non-cogging reduction motor protector includes non-magnetic stainless steel sleeve 1, permanent magnet 3 and two circular magnetic Stainless steel baffle 2;

The permanent magnet 3 is disc-shaped, and the permanent magnet 3 of the disc shape is fixedly installed in the non-magnetic stainless steel sleeve 1, and the magnetic circuit of the permanent magnet 3 of the disc shape is radially arranged, and the two circles Shaped magnetically conductive stainless steel baffle 2 is fixed on both ends of the non-magnetically conductive stainless steel sleeve 1, and the circular magnetically conductive stainless steel baffle 2 is attached to the two end faces of the disc-shaped permanent magnet 3, and the two circular guides The middle part of the magnetic stainless steel baffle plate 2 is respectively provided with shaft holes, and the middle part of the disc-shaped permanent magnet 3 is also provided with a shaft hole, and the N pole of the disc-shaped permanent magnet 3 is adjacent to the non-magnetic stainless steel sleeve 1. The S pole of a disc-shaped permanent magnet 3 is adjacent to the output shaft 4 of the motor 6, and the disc-shaped permanent magnet 3 is coaxially arranged with the shaft holes of two circular magnetically conductive stainless steel baffle plates 2, During use, the output shaft 4 of the motor 6 passes through the shaft holes of the disc-shaped permanent magnet 3 and two circular magnetically conductive stainless steel baffles 2, and the inner peripheral surface of the shaft hole of the disc-shaped permanent magnet 3 And gaps are provided between the inner peripheral surfaces of the shaft holes of the two circular magnetically conductive stainless steel baffle plates 2 and the output shaft 4 of the motor 6 .

The beneficial effects of the present invention are :

1. Using the radial magnetic circuit unipolar non-cogging reduction motor protector of the present invention, it only needs to be installed between the motor and the reducer according to the reserved space, which can effectively reduce the entry of iron filings and impurities. inside the motor body. Because the structure of the protector of the present invention is simple, all materials can be easily obtained, and the cost increase for the whole device is small, but the motor protection effect is very significant. Practice shows that after installing the protector of the present invention, the service life of the motor can be effectively increased by more than 16%, and the operation and maintenance cost of the motor can be reduced by more than 10%. It can be used in special environments such as petroleum and deep sea.

Description of drawings

Fig. 1 is the main sectional view of the radial magnetic circuit unipolar non-cogging reduction type motor protector of the present invention;

Fig. 2 is the front view of installing the radial magnetic circuit unipolar non-cogging reduction motor protector between the motor and the reducer of the present invention;

Fig. 3 is a left side view of Fig. 2 .

The names and labels of the components involved in the above figure are:

Non-magnetic stainless steel sleeve 1, circular magnetic conductive stainless steel baffle 2, permanent magnet 3, output shaft 4, motor protector 5, motor 6, reducer 7.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation is provided, but the protection scope of the present invention is not limited to the following embodiments.

Embodiment one :

As shown in Figure 1 and Figure 2, the radial magnetic circuit unipolar non-cogging reduction motor protector, the radial magnetic circuit unipolar non-cogging reduction motor protector includes a non-magnetic stainless steel sleeve 1, a permanent Magnet 3 and two circular magnetically conductive stainless steel baffles 2;

The permanent magnet 3 is disc-shaped, and the permanent magnet 3 of the disc shape is fixedly installed in the non-magnetic stainless steel sleeve 1, and the magnetic circuit of the permanent magnet 3 of the disc shape is radially arranged, and the two circles Shaped magnetically conductive stainless steel baffle 2 is fixed on both ends of the non-magnetically conductive stainless steel sleeve 1, and the circular magnetically conductive stainless steel baffle 2 is attached to the two end faces of the disc-shaped permanent magnet 3, and the two circular guides The middle part of the magnetic stainless steel baffle plate 2 is respectively provided with shaft holes, and the middle part of the disc-shaped permanent magnet 3 is also provided with a shaft hole, and the N pole of the disc-shaped permanent magnet 3 is adjacent to the non-magnetic stainless steel sleeve 1. The S pole of a disc-shaped permanent magnet 3 is adjacent to the output shaft 4 of the motor 6, and the disc-shaped permanent magnet 3 is coaxially arranged with the shaft holes of two circular magnetically conductive stainless steel baffle plates 2, During use, the output shaft 4 of the motor 6 passes through the shaft holes of the disc-shaped permanent magnet 3 and two circular magnetically conductive stainless steel baffles 2, and the inner peripheral surface of the shaft hole of the disc-shaped permanent magnet 3 And gaps are provided between the inner peripheral surfaces of the shaft holes of the two circular magnetically conductive stainless steel baffle plates 2 and the output shaft 4 of the motor 6 .

The N pole of the disc-shaped permanent magnet 3 is adjacent to the non-magnetic stainless steel sleeve 1, and the S pole of the disc-shaped permanent magnet 3 is adjacent to the output shaft 4 of the motor 6, so that the shafting, A complete closed magnetic circuit is formed between the air gap and the permanent magnet.

Embodiment two :

As shown in Figures 1 and 2, in the radial magnetic circuit unipolar non-cogging reduction motor protector described in Embodiment 1, the inner peripheral surface of the shaft hole of the disc-shaped permanent magnet 3 and the two circles The gap between the inner peripheral surface of the shaft hole of the magnetically conductive stainless steel baffle plate 2 and the output shaft 4 of the motor 6 is 1-2mm. This not only ensures the normal operation of the motor 6, but also prevents iron filings and impurities from entering the motor body to the greatest extent.

Working principle: As shown in Figures 1 to 3, the motor protector 7 of the present invention is installed coaxially with the motor 6 and the reducer 6, and is arranged between the motor 6 and the reducer 6. Due to the effect of the disc-shaped permanent magnet 3, impurities such as iron filings are adsorbed on the surfaces of the circular magnetically conductive stainless steel baffle plate 2 and the magnetically conductive stainless steel sleeve 4, but cannot be sucked into the body of the motor 6; due to the output shaft of the motor 6 4 and the inner peripheral surface of the shaft hole of the disc-shaped permanent magnet 3 and the inner peripheral surface of the shaft hole of the two circular magnetically conductive stainless steel baffles 2 are very small, only 1~2mm, so the iron filings particles with larger diameters can It is blocked outside the motor body, thereby protecting the motor 6, effectively preventing impurities such as iron filings generated by the mechanical friction of the reducer 6 from entering the inside of the motor 6 and causing the performance of the motor 6 to decline, and improving the performance of the motor 6 and The service life of its speed reducer 6; Described motor 6 is a permanent magnet synchronous motor.

Claims (2)

1. a radial magnetic circuit one pole slotless deceleration type motor protecter, is characterized in that: described radial magnetic circuit one pole slotless deceleration type motor protecter comprises non-magnetic stainless steel sleeve (1), permanent magnet (3) and two circular magnetic stainless steel baffle plates (2);

Described permanent magnet (3) is disc-shape, the permanent magnet (3) of disc-shape is installed in non-magnetic stainless steel sleeve (1), the magnetic circuit of the permanent magnet (3) of disc-shape is disposed radially, described two circular magnetic stainless steel baffle plates (2) are fixed on the two ends in non-magnetic stainless steel sleeve (1), and circular magnetic stainless steel baffle plate (2) reclines mutually with two end faces of the permanent magnet (3) of disc-shape, the middle part of two circular magnetic stainless steel baffle plates (2) is respectively equipped with axis hole, the middle part of the permanent magnet (3) of disc-shape is also provided with axis hole, the N pole of the permanent magnet (3) of disc-shape is disposed adjacent with non-magnetic stainless steel sleeve (1), the S pole of the permanent magnet (3) of multiple disc-shape is disposed adjacent with the output shaft (4) of motor (6), the permanent magnet (3) of described disc-shape and the axis hole of two circular magnetic stainless steel baffle plates (2) are coaxially arranged, during use, the output shaft (4) of described motor (6) passes the permanent magnet (3) of disc-shape and the axis hole of two circular magnetic stainless steel baffle plates (2), and be equipped with gap between the axle hole inner circle side face of the axle hole inner circle side face of the permanent magnet of disc-shape (3) and two circular magnetic stainless steel baffle plates (2) and the output shaft (4) of motor (6).

2. radial magnetic circuit one pole slotless deceleration type motor protecter according to claim 1, is characterized in that: the gap between the axle hole inner circle side face of the axle hole inner circle side face of the permanent magnet (3) of described disc-shape and two circular magnetic stainless steel baffle plates (2) and the output shaft (4) of motor (6) is 1 ~ 2mm.