Ultrahigh-power high-efficiency cooling liquid type permanent magnet speed regulator

Abstract

The utility model provides a kind of superhigh power high-efficiency cooling liquid cooling type permanent magnet speed regulator, with the characteristics of high transmission efficiency and good cooling effect. By grooving and arranging the core on the surface of the conductor disc, the magnetic field distribution is optimized, and the transmission efficiency is improved to about 98%. At the same time, the internal cooling liquid channel design is adopted, and the cooling liquid is directly delivered to the internal cooling liquid channel of the conductor disc through the internal flow channel of the output shaft, the rotating joint and the cooling liquid pipe, ensuring the full and uniform distribution of the cooling liquid, effectively avoiding the problem of local overheating and cooling liquid splashing, prolonging the service life of the equipment, and being especially suitable for superhigh power application scenarios.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet couplers and permanent magnet speed controllers, and in particular to an ultra-high power, high efficiency, liquid-cooled permanent magnet speed controller. Background Technology

[0002] Permanent magnet speed controllers, as a transmission device based on the eddy current principle, have been widely used in the industrial field. They generate an induced magnetic field by having a conductor disk cut the magnetic lines of force of a permanent magnet disk, thereby achieving torque transmission. As industrial equipment develops towards higher power and higher efficiency, the demand for permanent magnet speed controllers in high-load scenarios such as pumps and fans is increasing, especially for ultra-high power applications with a power transmission capacity exceeding 2000KW, such as large power plants or metallurgical equipment, where their performance and reliability are crucial.

[0003] Existing permanent magnet speed controllers primarily employ an integral conductor disk design without magnetic field enhancement, resulting in uneven magnetic field distribution and limited transmission efficiency, reaching a maximum of only around 95%. Furthermore, for high-power equipment, a cooling system is crucial for stable operation. Current liquid-cooled permanent magnet speed controllers typically use nozzles to spray coolant onto the conductor disk surface. However, due to the high-speed rotation of the conductor disk, coolant is prone to splashing and rebounding during spraying, leading to low utilization. The coolant's residence time on the conductor disk surface is too short, resulting in insufficient heat exchange. Moreover, coolant distribution relies mainly on centrifugal force, exhibiting severe unevenness, especially in the lower disk where gravity further reduces cooling effectiveness, easily leading to localized overheating and even burnout of the conductor disk. These problems are particularly pronounced in ultra-high power applications reaching 3000KW and above, severely restricting the application range and safety of permanent magnet speed controllers.

[0004] Therefore, there is an urgent need in this field for a permanent magnet speed controller that can significantly improve transmission efficiency and achieve efficient and uniform cooling, in order to solve the heat dissipation problem and efficiency bottleneck under ultra-high power conditions and ensure long-term stable operation of the equipment. Utility Model Content

[0005] The purpose of this invention is to provide an ultra-high power, high efficiency, liquid-cooled permanent magnet speed controller to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides an ultra-high power and high efficiency liquid-cooled permanent magnet speed controller, including a permanent magnet speed controller body. The permanent magnet speed controller body is provided with a conductor disk and a permanent magnet disk. A plurality of slots are opened on one side surface of the conductor disk, and an iron core is arranged in the slots. It also includes a cooling system, which includes a first coolant channel disposed inside the output shaft, and the first coolant channel is connected to a second coolant channel disposed inside the conductor disk via a coolant pipe.

[0007] Preferably, a heat sink is provided on the other side surface of the conductor disk.

[0008] Preferably, the slots are evenly arranged around the center circumference of the conductor disk.

[0009] Preferably, a permanent magnet is embedded on the surface of the permanent magnet disk.

[0010] Preferably, the output shaft has a hollow structure inside, and the hollow structure is connected to the first coolant flow channel.

[0011] Preferably, the output shaft is connected to a rotary joint via a connecting sleeve. The rotary joint has an annular structure, and its outer interface is connected to the coolant pipe via a first compression fitting straight pipe connector.

[0012] Preferably, the coolant pipe is connected to the conductor steel disc via a second compression fitting straight pipe joint and a compression fitting right-angle pipe joint, and the conductor steel disc is in communication with the second coolant flow channel.

[0013] The present invention achieves the following beneficial technical effects compared to the prior art: This invention provides an ultra-high power, high-efficiency liquid-cooled permanent magnet speed controller, characterized by high transmission efficiency and excellent cooling effect. By slotting the surface of the conductor disk and arranging the iron core, the magnetic field distribution is optimized, increasing the transmission efficiency to approximately 98%. Simultaneously, an internal coolant channel design is employed, with coolant directly delivered to the internal coolant channels of the conductor disk via the output shaft's internal flow channel, rotary joint, and coolant pipe. This ensures sufficient and uniform coolant distribution, effectively avoiding localized overheating and coolant splashing, extending the equipment's service life, and making it particularly suitable for ultra-high power applications. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the conductor disk structure of an ultra-high power, high efficiency liquid-cooled permanent magnet speed controller provided by this utility model; Figure 2A schematic diagram of the cooling system structure of an ultra-high power, high efficiency liquid-cooled permanent magnet speed controller provided by this utility model; Figure 3 A schematic diagram of the rotary joint structure of an ultra-high power, high efficiency liquid-cooled permanent magnet speed controller provided by this utility model. Detailed Implementation

[0016] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The purpose of this invention is to provide an ultra-high power, high-efficiency liquid-cooled permanent magnet speed controller to solve the problems of low transmission efficiency, poor cooling effect, and easy overheating and damage, especially under ultra-high power conditions, of the existing permanent magnet speed controllers.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1: This embodiment provides an ultra-high power, high-efficiency liquid-cooled permanent magnet speed controller, such as... Figure 1 and Figure 2 As shown, it includes the permanent magnet speed controller body and the cooling system.

[0022] Specifically, the permanent magnet speed regulator body mainly consists of a conductor disk 12 and a permanent magnet disk 13, which are arranged in parallel opposite directions and connected by an air gap plate (not shown in the figure) to adjust the size of the air gap between them to achieve speed regulation. The conductor disk 12 is made of a high-strength conductive material, such as copper alloy or aluminum alloy, to ensure good conductivity and mechanical strength. Multiple slots 14 are uniformly formed circumferentially on one side surface of the conductor disk 12. The depth and width of the slots 14 are determined based on magnetic field simulation optimization, typically 1 / 3 to 1 / 2 of the conductor disk thickness. An iron core 15 is tightly embedded within the slots 14. The iron core 15 is made of a high-permeability material, such as silicon steel sheet or soft magnetic composite material, and its shape matches the slots 14. It is fixed by interference fit or adhesive to enhance magnetic field concentration and eddy current effect. Radial heat sinks 16 are also provided on the other side surface of the conductor disk 12. The heat sinks 16 are integrally formed with the conductor disk 12 or connected by welding to increase the heat dissipation area and assist internal cooling.

[0023] Furthermore, the permanent magnet disk 13 employs a non-magnetic material support structure, with multiple sets of permanent magnets 17 circumferentially embedded on its surface. The permanent magnets 17 are made of high energy product materials such as neodymium iron boron, and their magnetic properties are alternately arranged in an NSN sequence along the circumferential direction to form a stable radial magnetic field. The arrangement of the permanent magnets 17 corresponds to the slots 14 and iron core 15 of the conductor disk 12, ensuring maximum magnetic field interaction during operation.

[0024] The cooling system is a key component of this invention, used to achieve efficient and uniform cooling of the conductor disk 12. For example... Figure 2 and Figure 3 As shown, the output shaft 7 has a hollow structure, with an internal hollow structure 9 and a first coolant flow channel 10. The hollow structure 9 serves as the main coolant channel, and the first coolant flow channel 10 is a branch channel connected to the hollow structure 9. The output shaft 7 is externally connected to the rotary joint 5 via a connecting sleeve 6. The connecting sleeve 6 is made of high-strength alloy steel and has an internal sealing ring (e.g., an O-ring) to ensure no coolant leakage. The rotary joint 5 has an annular structure with multiple coolant holes on its side, which are aligned and connected to the coolant holes on the side of the output shaft 7 via the connecting sleeve 6, forming a continuous coolant path. The outer interface of the rotary joint 5 is connected to the coolant pipe 3 via a first compression fitting straight-through pipe connector 4. The first compression fitting straight-through pipe connector 4 ensures the sealing and detachability of the connection, facilitating maintenance.

[0025] Furthermore, the coolant pipe 3 is a flexible metal pipe (such as a stainless steel corrugated pipe), and its other end is connected to the conductor steel disc 8 through a second compression fitting straight pipe connector 2 and a compression fitting right-angle pipe connector 1. The conductor steel disc 8 is fixed to the back of the conductor disc 12 and communicates with the second coolant flow channel 11 inside the conductor disc 12. The second coolant flow channel 11 is an annular or multi-channel structure, integrated inside the conductor disc 12, and formed by casting or machining. The flow channel cross-section is circular or rectangular to ensure uniform coolant flow. The arrangement path of the coolant pipe 3 avoids rotating parts to reduce the impact of vibration.

[0026] The working principle of this utility model is as follows: When the permanent magnet speed regulator is running, the motor drives the output shaft 7 to rotate, which in turn drives the conductor disk 12 to cut the magnetic lines of force of the permanent magnet disk 13, generating eddy currents and transmitting torque. Because the iron core 15 within the groove 14 on the surface of the conductor disk 12 enhances the magnetic field strength, the eddy current effect is significantly improved, and the transmission efficiency can reach 98%. Simultaneously, coolant enters the hollow structure 9 of the output shaft 7 from the external supply system, flows into the rotary joint 5 through the first coolant channel 10, and enters the coolant pipe 3 through the coolant hole and connecting sleeve 6. Under pressure, the coolant is guided by the compression fittings 1 and 2 and directly sprayed into the second coolant channel 11 inside the conductor disk 12. Because the coolant flows within the internal channels, splashing and uneven centrifugal distribution are avoided, ensuring that the conductor disk 12 is adequately cooled. The heat sink 16 further assists in heat dissipation and prevents localized overheating. The coolant is finally discharged from the return channel, completing the circulation.

[0027] Through the above structure, this utility model not only significantly improves the transmission efficiency, but also solves the cooling problem under ultra-high power conditions, ensuring the long-term stable operation of the equipment.

[0028] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0029] It should be noted that the components mentioned in the above embodiments are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0030] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A high-power, high-efficiency liquid-cooled permanent magnet speed controller, comprising a permanent magnet speed controller body, wherein the permanent magnet speed controller body is provided with a conductor disk (12) and a permanent magnet disk (13), characterized in that: The conductor disk (12) has multiple slots (14) on one side surface, and an iron core (15) is arranged in the slots (14). It also includes a cooling system, which includes a first coolant channel (10) disposed inside the output shaft (7), and the first coolant channel (10) is connected to a second coolant channel (11) disposed inside the conductor disk (12) via a coolant pipe (3).

2. The ultra-high power, high-efficiency liquid-cooled permanent magnet speed controller according to claim 1, characterized in that: The other side surface of the conductor disk (12) is provided with heat sink (16).

3. The ultra-high power, high-efficiency liquid-cooled permanent magnet speed controller according to claim 1, characterized in that: The grooves (14) are evenly arranged around the center of the conductor disk (12).

4. The ultra-high power, high-efficiency liquid-cooled permanent magnet speed controller according to claim 1, characterized in that: The surface of the permanent disk (13) is embedded with a permanent magnet (17).

5. The ultra-high power, high-efficiency liquid-cooled permanent magnet speed controller according to claim 1, characterized in that: The output shaft (7) has a hollow structure (9) inside, which is connected to the first coolant flow channel (10).

6. The ultra-high power, high-efficiency liquid-cooled permanent magnet speed controller according to claim 1, characterized in that: The output shaft (7) is connected to the rotary joint (5) via a connecting sleeve (6). The rotary joint (5) is a ring structure, and its outer interface is connected to the coolant pipe (3) via a first compression fitting straight pipe joint (4).

7. The ultra-high power, high-efficiency liquid-cooled permanent magnet speed controller according to claim 1, characterized in that: The coolant pipe (3) is connected to the conductor steel disc (8) through the second compression fitting straight pipe joint (2) and the compression fitting right angle pipe joint (1), and the conductor steel disc (8) is connected to the second coolant flow channel (11).

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