CN221767694U - Heat dissipation structure of permanent magnet synchronous motor rotor assembly - Google Patents

Abstract

The utility model provides a heat radiation structure of a rotor assembly of a permanent magnet synchronous motor, which relates to the field of rotor assemblies and comprises a rotor yoke and a plurality of rotor magnetic steels fixedly arranged on the inner wall of the rotor yoke, wherein a heat radiation part plays a role in radiating heat inside the rotor yoke by utilizing the rotation of the rotor yoke, an assembly part is used for connecting the heat radiation part with the rotor yoke, the heat radiation part is additionally arranged inside the rotor yoke through a conversion part, the heat radiation part can rotate along with the rotor yoke, the heat radiation part can accelerate the air flow velocity inside the rotor yoke in the running process of the rotor yoke, the heat radiation effect on the rotor magnetic steels can be improved by increasing the air flow velocity, the rotor magnetic steels are driven to radiate heat by utilizing the rotation of the rotor yoke, and the technical problems that the whole production cost of a dragging device is increased and resources are excessively wasted due to the fact that the power of the dragging device is increased because of the fact that the load of the dragging device is heated up too fast are solved.

Description

Heat dissipation structure of permanent magnet synchronous motor rotor assembly

Technical Field

The utility model relates to the field of rotor components, in particular to a heat dissipation structure of a permanent magnet synchronous motor rotor component.

Background Art

With the development of the elevator industry, the design of traction device products has improved, and the purpose of energy conservation and energy efficiency reduction has become a technical problem that traction device designers are eager to solve.

The existing traction device uses permanent magnet synchronous motor technology. The traction device runs under load for a long time during work, which causes the temperature of the traction device to rise too quickly. The high temperature will affect the performance of the main engine and will also cause the risk of demagnetization of the magnetic steel in the rotor assembly. The existing technology is to suppress the rapid temperature increase by increasing the power of the traction device (the power is increased by increasing the size of the motor and increasing the amount of copper wire and magnetic steel used), but this technology will increase the cost of the traction device and waste resources excessively.

Utility Model Content

The purpose of the utility model is to provide a heat dissipation structure of a permanent magnet synchronous motor rotor assembly to alleviate the technical problem in the prior art that in order to prevent the traction device from heating up too quickly due to load, the power of the traction device is increased, resulting in an increase in the overall production cost of the traction device and excessive waste of resources.

The utility model provides a heat dissipation structure of a permanent magnet synchronous motor rotor assembly, comprising:

A rotor yoke and a plurality of rotor magnets fixedly arranged on the inner wall of the rotor yoke;

A heat dissipation component, which utilizes the rotation of the rotor yoke to dissipate heat inside the rotor yoke, and the heat dissipation component is arranged on the inner side of the rotor yoke;

The assembly component is used to connect the heat dissipation component with the rotor yoke, and the assembly component is arranged between the rotor yoke and the heat dissipation component.

In an alternative embodiment,

A plurality of the rotor magnets are circumferentially distributed on the inner wall of the rotor yoke at equal intervals, and a gap exists between two rotor magnets that are close to each other.

In an alternative embodiment,

The interior of each gap is coated with thermal conductive silicone grease.

In an alternative embodiment,

The heat dissipation component includes a plurality of wind blades arranged inside the rotor yoke and distributed at equal intervals around the axis of the rotor yoke;

The wind blade comprises a horizontal mounting portion and a tilted fanning portion, wherein the horizontal mounting portion is parallel to the end surface of the rotor yoke, and an angle is formed between the horizontal mounting portion and the tilted fanning portion.

In an alternative embodiment,

The assembly component includes an assembly annular portion fixedly arranged on the inner wall of the rotor yoke, and the horizontal mounting portion is fitted with the end surface of the assembly annular portion, a mounting screw is inserted inside each of the horizontal mounting portions, and each of the mounting screws is threadedly assembled with the assembly annular portion.

In an alternative embodiment,

A chamfered portion is provided at a connection between the assembly annular portion and the rotor yoke.

In an alternative embodiment,

The end face of the rotor magnet extending into the interior of the rotor yoke is the first end face, and the end face of the rotor magnet close to the rotor yoke port is the second end face, the end face of the assembly annular portion close to the rotor yoke port is the third end face, and the wind blade is located between the first end face and the third end face.

In an alternative embodiment,

An angle between an end surface of the tilted fan portion away from the horizontal mounting portion and the third end surface does not exceed ninety degrees.

In an alternative embodiment,

The wind blades are made of hard metal material.

In an alternative embodiment,

The wind blades are made of non-metallic hard materials.

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

The heat dissipation structure of the permanent magnet synchronous motor rotor assembly provided by the utility model is that a heat dissipation component is installed inside the rotor yoke through a transfer component. The heat dissipation component can rotate with the rotor yoke. During the operation of the heat dissipation component following the rotor yoke, the air flow rate inside the rotor yoke can be accelerated. The increase in air flow rate can improve the heat dissipation effect on the rotor magnet. The air flow is driven by the rotation of the rotor yoke itself to dissipate the heat of the rotor magnet, thereby alleviating the technical problem that the power of the traction device is increased in order to avoid the traction device from heating up too fast due to load, resulting in an increase in the overall production cost of the traction device and excessive waste of resources.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the structure of a heat dissipation component of a permanent magnet synchronous motor rotor assembly provided in an embodiment of the utility model.

Icons: 1- rotor yoke; 2- rotor magnet; 3- assembly ring part; 4- chamfered part; 5- wind blade; 6- mounting screw.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

Example 1

Please refer to FIG1 , a heat dissipation structure of a permanent magnet synchronous motor rotor assembly provided in this embodiment includes:

A rotor yoke 1 and a plurality of rotor magnets 2 fixedly arranged on the inner wall of the rotor yoke 1;

The heat dissipation component utilizes the rotation of the rotor yoke 1 to dissipate heat inside the rotor yoke 1, and the heat dissipation component is arranged on the inner side of the rotor yoke 1;

The assembly component is used to connect the heat dissipation component to the rotor yoke 1 , and the assembly component is arranged between the rotor yoke 1 and the heat dissipation component.

The heat dissipation structure of the permanent magnet synchronous motor rotor assembly provided in the present embodiment is that a heat dissipation component is installed inside the rotor yoke 1 through a transfer component. The heat dissipation component can rotate along with the operation of the rotor yoke 1. When the heat dissipation component follows the operation of the rotor yoke 1, the air flow rate inside the rotor yoke 1 can be accelerated. The increase in air flow rate can improve the heat dissipation effect on the rotor magnet 2. The air flow is driven by the rotation of the rotor yoke 1 to dissipate the heat of the rotor magnet 2, thereby alleviating the problem that the power of the traction device is increased in order to avoid excessive temperature rise of the traction device due to load, resulting in an increase in the overall production cost of the traction device and excessive waste of resources.

On the basis of the above embodiments, the present embodiment provides a heat dissipation structure of a permanent magnet synchronous motor rotor assembly, in which a plurality of rotor magnets 2 are circumferentially and evenly spaced on the inner wall of a rotor yoke 1, and a gap exists between two rotor magnets 2 that are close to each other;

The rotor magnets 2 that are evenly spaced around the circumference will not cause the rotor yoke 1 to vibrate when rotating with the rotor yoke 1. The gap between two adjacent rotor magnets 2 is used to apply thermal grease.

The inside of each gap is coated with thermal grease;

During the assembly of the rotor yoke 1 , thermal grease is filled between two adjacent rotor magnets 2 in advance. The high thermal conductivity of the thermal grease can be used to accelerate the transfer and dissipation of the surface temperature of the rotor yoke 1 .

The heat dissipation component includes a plurality of wind blades 5 which are arranged inside the rotor yoke 1 and are distributed at equal intervals around the axis of the rotor yoke 1;

The wind blades 5 distributed at equal intervals on the circumference will not cause the rotor yoke 1 to vibrate when rotating at high speed. Moreover, when the rotor yoke 1 rotates with the wind blades 5, the wind blades 5 fan the air, which can speed up the air flow rate inside the rotor yoke 1, thereby improving the heat dissipation effect of the rotor yoke 1.

The wind blade 5 includes a horizontal mounting portion and a tilted fanning portion, the horizontal mounting portion is parallel to the end surface of the rotor yoke 1, and there is an angle between the horizontal mounting portion and the tilted fanning portion;

The horizontal mounting portion is used for fixed mounting, while the tilted fan portion mainly serves to accelerate the air flow rate inside the rotor yoke 1 .

The assembly component includes an assembly annular portion 3 fixedly arranged on the inner wall of the rotor yoke 1, and the horizontal mounting portion is in contact with the end surface of the assembly annular portion 3. A mounting screw 6 is inserted inside each horizontal mounting portion, and each mounting screw 6 is threadedly assembled with the assembly annular portion 3.

The wind blade 5 is bolted and fixed to the horizontal mounting portion and the mounting annular portion 3 by means of mounting screws.

A chamfered portion 4 is provided at the connection between the assembly annular portion 3 and the rotor yoke 1;

The chamfered portion 4 can be a round chamfer or an oblique chamfer. The chamfered design can make the air inside the rotor yoke 1 flow more smoothly, and will not cause the problem of airflow collision due to the vertical contact between the end face of the mounting annular portion 3 and the inner wall of the rotor yoke 1.

The end face of the rotor magnetic steel 2 extending into the inside of the rotor yoke 1 is the first end face, the end face of the rotor magnetic steel 2 close to the end of the rotor yoke 1 is the second end face, the end face of the mounting annular portion 3 close to the end of the rotor yoke 1 is the third end face, and the wind blade 5 is located between the first end face and the third end face;

That is, the mounting annular portion 3 is positioned deeper into the rotor yoke 1 than the rotor magnetic steel 2 .

The angle between the end surface of the tilted fan portion away from the horizontal mounting portion and the third end surface does not exceed ninety degrees;

If the angle between the end face of the tilted fan portion away from the horizontal mounting portion and the third end face exceeds ninety degrees, when the worker uses a screwdriver to assemble the mounting screws 6, the tilted fan portion will hinder the worker.

Working principle:

When the staff assembles the internal structure of the rotor yoke 1, after several rotor magnets 2 are installed, it is necessary to apply thermal conductive silicone grease between two adjacent rotor magnets 2. After the coating is completed, the wind blades 5 can be installed.

During the installation of the wind blade 5, the horizontal installation part should be fitted with the end face of the assembly annular part 3. After fitting, the staff uses a screwdriver to screw the installation screw 6 to fix the wind blade 5 on the end face of the assembly annular part 3. During the assembly of several wind blades 5, it is also necessary to pay attention to the fact that the inclination of each wind blade 5 should be consistent to ensure that the wind blade 5 fanning the air at the same angle when rotating with the rotor yoke 1;

When the traction device equipped with the rotor assembly of the present invention is in operation, the rotor yoke 1 rotates at a high speed, and the plurality of wind blades 5 inside it rotates with the rotor yoke 1 at the same time. By tilting the fan part and fanning the air, the air flow rate inside the rotor yoke 1 can be accelerated. Combined with the conduction of heat energy on the surface of the rotor yoke 1 and the rotor magnetic steel 2 by the thermal conductive silicone grease, the heat dissipation effect of the entire rotor assembly can be improved.

Moreover, the rotor assembly accelerates the air flow rate inside the rotor yoke 1 through its own rotation, thereby achieving the purpose of rapid cooling, so the overall manufacturing cost is low, and there is no need to deliberately increase the production size of the rotor yoke 1, which can alleviate the problem in the prior art that the power of the traction device is increased in order to avoid the traction device from heating up too quickly due to load, resulting in an increase in the overall production cost of the traction device.

In this solution, the corners of the wind blade 5 can also be rounded to prevent workers from being stabbed by the sharp parts of the wind blade 5 during the installation process.

Example 2

Please refer to FIG. 1 , which shows another implementation of the wind blade 5:

The wind blade 5 is made of a hard metal material.

In this embodiment:

The material of the wind blade 5 is pure copper or an alloy material mainly composed of copper. The wind blade 5 made of this type of material has better thermal conductivity and can absorb the heat on the surface of the rotor yoke 1, and then conduct the heat away under high-speed rotating fan, further improving the heat dissipation effect inside the rotor assembly.

Example 3

Please refer to FIG. 1 , which shows another implementation of the wind blade 5:

The wind blade 5 is made of non-metallic hard material.

In this embodiment:

If the structural cost of the heat dissipation components is taken into consideration, the material of the wind blades 5 can be replaced with nylon. The wind blades 5 made of nylon have high toughness and are resistant to corrosion and high temperatures. This can reduce the production cost of the heat dissipation components while ensuring the heat dissipation effect of the wind blades 5 when they rotate with the rotor yoke 1.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims (10)

1. A heat dissipation structure for a permanent magnet synchronous motor rotor assembly, comprising:

The rotor magnetic yoke (1) and a plurality of rotor magnetic steels (2) fixedly arranged on the inner wall of the rotor magnetic yoke (1);

a heat radiation member which radiates heat from the inside of the rotor yoke (1) by the rotation of the rotor yoke (1), the heat radiation member being provided inside the rotor yoke (1);

And the assembly component is used for connecting the heat dissipation component with the rotor magnet yoke (1), and is arranged between the rotor magnet yoke (1) and the heat dissipation component.

2. The heat dissipating structure of a permanent magnet synchronous motor rotor assembly of claim 1,

The rotor magnetic steels (2) are circumferentially distributed on the inner wall of the rotor magnetic yoke (1) at equal intervals, and gaps exist between the two rotor magnetic steels (2) which are close to each other.

3. The heat dissipating structure of a permanent magnet synchronous motor rotor assembly of claim 2,

The interior of each gap is coated with a thermally conductive silicone grease.

4. The heat dissipating structure of a permanent magnet synchronous motor rotor assembly of claim 1,

The heat dissipation part comprises a plurality of fan blades (5) which are arranged in the rotor magnet yoke (1) and are distributed at equal intervals in a circle by taking the axis of the rotor magnet yoke (1) as the center;

The fan blade (5) comprises a horizontal installation part and a tilting fan part, wherein the horizontal installation part and the end face of the rotor magnetic yoke (1) are distributed in parallel, and an included angle exists between the horizontal installation part and the tilting fan part.

5. The heat dissipating structure of a permanent magnet synchronous motor rotor assembly of claim 4,

The assembly component comprises an assembly annular portion (3) fixedly arranged on the inner wall of the rotor magnet yoke (1), the horizontal installation portions are attached to the end faces of the assembly annular portion (3), an installation screw (6) is inserted into each horizontal installation portion, and each installation screw (6) is assembled with the assembly annular portion (3) in a threaded mode.

6. The heat dissipating structure of a permanent magnet synchronous motor rotor assembly of claim 5,

The connection part of the assembly annular part (3) and the rotor magnetic yoke (1) is provided with a chamfer part (4).

7. The heat dissipating structure of a permanent magnet synchronous motor rotor assembly of claim 5,

The end face of the rotor magnetic steel (2) extending into the rotor magnetic yoke (1) is a first end face, the end face of the rotor magnetic steel (2) close to the port of the rotor magnetic yoke (1) is a second end face, the end face of the assembly annular part (3) close to the port of the rotor magnetic yoke (1) is a third end face, and the fan blade (5) is located between the first end face and the third end face.

8. The heat dissipating structure of a permanent magnet synchronous motor rotor assembly of claim 7,

The angle between an end surface of the upwarp fan part far away from the horizontal installation part and the third end surface is not more than ninety degrees.

9. The heat dissipating structure of a permanent magnet synchronous motor rotor assembly of claim 4,

The fan blades (5) are made of metal hard materials.

10. The heat dissipating structure of a permanent magnet synchronous motor rotor assembly of claim 4,

The fan blades (5) are made of nonmetallic hard materials.