CN209676105U - A Novel Composite Permanent Magnet Eddy Current Governor - Google Patents

Abstract

The utility model discloses a novel composite permanent magnet eddy current governor, which comprises two cylindrical series structures and a disc structure, wherein the cylindrical structure is composed of bilateral permanent magnet rotors and conductor slots. The governor can increase the magnetic energy density of the permanent magnet eddy current governor, reduce eddy current heating, increase the output power, shorten the adjustment stroke of the high-power permanent magnet eddy current governor, and improve the speed regulation performance and efficiency. Under the condition of providing the same output power, the required volume of the whole device is smaller, thereby occupying a smaller space, saving materials, and saving economic costs.

Description

A Novel Composite Permanent Magnet Eddy Current Governor

technical field

The invention relates to the technical field of electrical control engineering, in particular to a novel composite permanent magnet eddy current governor.

Background technique

With the continuous deepening of energy and crisis awareness, energy conservation and emission reduction, and the promotion of green and low-carbon development have attracted widespread attention from all over the world. Countries have proposed to develop new energy sources, innovate to improve the utilization rate of existing energy sources, and realize new industrial restructuring and upgrading. move.

Speed regulation is one of the new directions for the development of fan and pump load energy-saving technologies. The output power of the motor is proportional to the cube of the speed, so when the speed is reduced to adjust the load flow or pressure, the output power of the motor will be reduced, thereby achieving energy saving.

The permanent magnet eddy current governor achieves torque transmission through the magnetic field coupling between the conductor rotor and the permanent magnet rotor, which can be well applied in the above harsh environments, and also has soft start, vibration isolation, no need for precise calibration, and no electromagnetic interference and other advantages of harmonic current. Permanent magnet eddy current speed regulation is a new type of non-contact flexible energy-saving speed regulation device. When the load is overloaded, it can isolate the motor from the load, and it is easy to find faults. The non-contact connection effectively avoids the vibration transmission between the motor and the load, reduces noise, improves the reliability of equipment operation, and thus greatly reduces operating costs.

With the development of permanent magnet eddy current governor from low power to high power, the existing permanent magnet eddy current governor has large volume, fast temperature rise, long adjustment stroke and inconvenient installation and use under the condition of non-uniform high load and other series of questions.

Contents of the invention

The present invention aims at above-mentioned defect, provides a kind of novel composite permanent magnet eddy current governor, and its specific technical scheme is as follows:

A novel composite permanent magnet eddy current governor, including a motor shaft and a load shaft, the motor shaft and the load shaft are coaxially arranged, and the motor shaft and the load shaft can move closer to or farther away from each other along the axial direction. It is characterized in that, The opposite ends of the motor shaft and the load shaft are provided with disk-type conductors and disk-type permanent magnets. The motor shaft is sleeved with a cylindrical motor back iron, the end of the motor back iron is open, and the load The shaft is sleeved with a load inner back iron and a load outer back iron. The load inner back iron and the load outer back iron are both cylindrical structures. The load inner back iron is sleeved in the load outer back iron. The motor back iron sleeve Connected to the outer side of the load inner back iron and the inner side of the load inner back iron post; the inner and outer walls of the motor back iron are correspondingly provided with cylindrical conductors, and the inner wall of the load outer back iron and the outer wall of the load inner back iron are respectively provided with outer permanent magnets and inner permanent magnets.

As an improvement of this solution, the cylindrical conductor, the inner permanent magnet and the outer permanent magnet are all ring structures, and the widths of the three are equal.

As an improvement of this scheme, the cylindrical conductor is composed of strip-shaped circular arc plates evenly distributed around the side wall of the back iron of the motor. The arc-shaped plates are respectively embedded in the grooves.

As an improvement of this solution, there are no less than two sets of the cylindrical conductor, the inner permanent magnet and the outer permanent magnet, and the three are evenly distributed along the axial direction.

As an improvement of this solution, the distance between adjacent permanent magnets in the inner layer is greater than the width of the cylindrical conductor, and the permanent magnets in the outer layer are arranged correspondingly to the permanent magnets in the inner layer.

As an improvement of this solution, when the distance between the opposite ends of the motor shaft and the load shaft is at the maximum, the distance between the disc conductor and the disc permanent magnet is the width of a single group of barrel conductors.

As an improvement of this solution, when the distance between the opposite ends of the motor shaft and the load shaft is at the maximum, each group of cylindrical conductors is just located between two adjacent groups of inner permanent magnets and outer permanent magnets.

Compared with the prior art, the present invention has the following technical effects:

1. The present invention improves the magnetic energy density of the permanent magnet eddy current governor by setting two cylindrical series structures and a disc structure, which can be significantly improved compared with a separate cylindrical or disc permanent magnet eddy current governor occupying the same volume. Increase output power;

2. The speed governor disclosed in the present invention further reduces the volume and mass of the whole speed governor, which facilitates the arrangement and installation of the speed governor in the actual application process;

3. In the present invention, the cylindrical conductor, the inner permanent magnet and the outer permanent magnet are all provided with multiple groups evenly distributed along the axial direction, which greatly shortens the adjustment stroke and greatly improves the speed regulation performance compared with the traditional speed governor and efficiency;

4. The conductor-permanent magnet assembly of the cylindrical structure and the disc structure of the present invention has a unified adjustment stroke, which is convenient for centralized adjustment;

5. The cylindrical conductor in the present invention is a ring conductor composed of multiple arc-shaped sheet structures, which effectively reduces eddy current loss and reduces device heat generation;

/6. The governor disclosed in the present invention provides the same output power, and the volume required by the whole device is smaller, thereby occupying a smaller space, saving materials, and saving economic costs.

Description of drawings

Fig. 1, described novel composite permanent magnet eddy current governor structural representation;

Fig. 2 is a cross-sectional view of the novel composite permanent magnet eddy current governor.

Reference signs: 1. Motor shaft; 2. Load shaft; 3. Motor back iron; 4. Load inner back iron; 5. Load outer back iron; 6. Disc conductor; 7. Disc permanent magnet; 8. Barrel Type conductor; 9, inner permanent magnet; 10, outer permanent magnet; 11, air gap.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout.

As shown in Figure 1, it is a new type of composite permanent magnet eddy current governor, including motor shaft 1 and load shaft 2, the motor shaft 1 and load shaft 2 are coaxially arranged, and the motor shaft 1 and load shaft 2 can be aligned in the axial direction Movements move towards or away from each other. Disc conductors 6 and disc permanent magnets 7 are arranged at opposite ends of the motor shaft 1 and the load shaft 2 . A cylindrical motor back iron 3 is sleeved on the motor shaft 1, and the end of the motor back iron 3 is open. The load inner back iron 4 and the load outer back iron 5 are sleeved on the load shaft 2. The load inner back iron 4 and the load The outer back irons 5 are all cylindrical structures, the load inner back iron 4 is socketed in the load outer back iron 5, the motor back iron 3 is socketed in the load inner back iron 4 outside and the load inner back iron 4 post inside. The inner and outer walls of the motor back iron 3 are correspondingly provided with cylindrical conductors 8 , and the outer layer permanent magnets 10 and inner layer permanent magnets 9 are respectively arranged on the inner wall of the outer load back iron and the outer wall of the inner load back iron.

The cylindrical conductor 8, the inner layer permanent magnet 9 and the outer layer permanent magnet 10 are all ring structures, and the widths of the three are equal. There are two sets of cylindrical conductors 8, inner permanent magnets 9 and outer permanent magnets 10, all of which are evenly distributed along the axial direction. As an improvement of this solution, the distance between adjacent inner permanent magnets 9 is greater than the width of the cylindrical conductor 8 , and the outer permanent magnets 10 are arranged correspondingly to the inner permanent magnets 9 . When the distance between the opposite ends of the motor shaft 1 and the load shaft 2 is at the maximum, the distance between the disc conductor 6 and the disc permanent magnet 7 is the width of a single group of cylindrical conductors 8, and at the same time, each group of cylindrical conductors 8 is just located in two phases. between the adjacent inner permanent magnets 9 and outer permanent magnets 10.

As shown in Figure 2, the cylindrical conductor 8 is composed of strip-shaped arc plates evenly distributed around the side wall of the back iron 3 of the motor. The arc-shaped plates are respectively embedded in the grooves. There is an air gap 11 between the outer permanent magnet 10 and the cylindrical conductor 8 , and there is an air gap 11 between the inner permanent magnet 9 and the cylindrical conductor 8 .

When the speed governor is actually used, since there are multiple sets of cylindrical conductors 8, outer permanent magnets 10 and inner permanent magnets 9, when adjusting, within the adjustment range of the adjustment stroke L, each set of cylindrical conductors 8 1. Both the outer permanent magnet 10 and the inner permanent magnet 9 are magnetically adjusted. Compared with the traditional single-tube regulator, the length of the adjustment stroke L is greatly reduced, which is convenient for use. At the same time, since the inner and outer sides of the motor back iron 3 are provided with cylindrical back irons with permanent magnets, the magnetic energy density is greatly increased and the actual working efficiency of the governor is improved under the condition of the same equipment volume. Since the cylindrical conductor 8 is composed of a plurality of strip-shaped circular arc plates, there is a certain gap between each strip-shaped circular arc plate, which effectively reduces eddy current loss and heat generation of the device. The speed governor disclosed in the present invention provides the same output power, and the volume required by the whole device is smaller, thereby occupying a smaller space, saving materials, and saving economic costs.

The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims (7)

1. A novel composite permanent magnet eddy current governor, comprising a motor shaft (1) and a load shaft (2), the motor shaft (1) and the load shaft (2) are coaxially arranged, and the motor shaft (1) and The load shaft (2) can move towards or away from each other in the axial direction, and it is characterized in that the opposite ends of the motor shaft (1) and the load shaft (2) are provided with disk conductors (6) and disk permanent magnets (7), the motor shaft (1) is sleeved with a cylindrical motor back iron (3), the end of the motor back iron (3) is open, and the load shaft (2) is sleeved with a load The inner back iron (4) and the load outer back iron (5), the load inner back iron (4) and the load outer back iron (5) are both cylindrical structures, the load inner back iron (4) is socketed on the load Inside the outer back iron (5), the motor back iron (3) is sleeved on the outer side of the load inner back iron (4) and the inner side of the load inner back iron (4); type conductor (8), the inner side wall of the load outer back iron (5) and the outer side wall of the load inner back iron (4) are respectively provided with an outer layer permanent magnet (10) and an inner layer permanent magnet (9). 2. A kind of novel composite permanent magnet eddy current speed governor according to claim 1, is characterized in that, described tubular conductor (8), inner layer permanent magnet (9) and outer layer permanent magnet (10) are Ring structure, and the width of the three is equal. 3. A novel compound permanent magnet eddy current governor according to claim 2, characterized in that, the cylindrical conductor (8) is a strip-shaped circle evenly distributed around the side wall of the back iron (3) of the motor. Composed of arc plates, the inner and outer walls of the motor back iron (3) are uniformly provided with grooves, and the strip-shaped arc plates forming the cylindrical conductor (8) are respectively embedded in the grooves. 4. A novel composite permanent magnet eddy current governor according to claim 3, characterized in that, the cylindrical conductor (8), the inner permanent magnet (9) and the outer permanent magnet (10) are all provided with There are no less than 2 groups, all of which are evenly distributed along the axial direction. 5. a kind of novel composite permanent magnet eddy current governor according to claim 4 is characterized in that, the distance between adjacent inner layer permanent magnets (9) is greater than the width of the tubular conductor (8), and the outer layer permanent magnets ( 10) Correspondingly arranged with the inner layer permanent magnet (9). 6. A novel composite permanent magnet eddy current governor according to claim 5, characterized in that, when the motor shaft (1) and the opposite ends of the load shaft (2) are at the maximum distance, the disc conductor (6) The distance between it and the disc permanent magnet (7) is the width of a single group of cylindrical conductors (8). 7. A kind of novel composite permanent magnet eddy current speed governor according to claim 6, is characterized in that, when being in maximum distance between motor shaft (1) and load shaft (2) relative end, each group of cylindrical conductors ( 8) Just located between two groups of adjacent inner layer permanent magnets (9) and outer layer permanent magnets (10).