Conductor rotor capable of enhancing heat dissipation convection

Abstract

The utility model relates to a conductor rotor capable of enhancing heat dissipation convection, which comprises a conductor rotor, heat dissipation fins and fixing screws, radiating fins are uniformly distributed and mounted on the periphery of the cylindrical wall of the conductor rotor, the radiating fins are fixed on the cylindrical wall by using fixing screws, the fixing screws are hollow screws and are provided with overflowing holes, and the overflowing holes penetrate through the inner space and the outer space of the conductor rotor; the heat dissipation performance is greatly improved, the reliability of the system is improved, the system can be optimized to be used for transformation of equipment with higher power, and the application range is expanded.

Description

Technical Field

[0001] The utility model belongs to the technical field of permanent magnet speed regulation, in particular to a conductor rotor with improved heat dissipation of a permanent magnet speed regulator. Background Art

[0002] In large-scale mining, petrochemical, electric power and metallurgy industries, due to the need for energy conservation and environmental protection, the application of permanent magnet speed control devices is becoming more and more extensive. Permanent magnet speed control devices can adapt to various harsh environments, including places with large grid voltage fluctuations, serious harmonics, flammable and explosive, humid, dusty and other places. The speed of the load can be adjusted online to meet the actual operation needs of the system and achieve speed regulation and energy saving. The speed regulation range is 0-98%, and the energy saving rate is 10% to 65%. When working, the motor drives the conductor rotor of the permanent magnet speed regulator to rotate. The copper conductor on the conductor rotor cuts the magnetic flux lines emitted by the permanent magnet on the permanent magnet rotor to generate eddy currents. The eddy currents generate an induced magnetic field. The induced magnetic field is coupled with the source magnetic field of the permanent magnet to generate torque, so that the permanent magnet rotor drives the load to rotate. Since the permanent magnet speed regulation technology is simple and reliable, the equipment has a long service life and there is no electromagnetic wave interference problem; therefore, the speed control devices in many places with difficult conditions are gradually replaced by permanent magnet speed regulators.

[0003] The existing permanent magnet speed regulator conductor rotor generates eddy current heat, which needs to be dissipated. The air-cooled type generally uses a heat sink for natural cooling. Due to the poor heat dissipation effect, the local temperature is high, and the high temperature causes demagnetization of the permanent magnet performance, and even causes serious failures. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a conductor rotor with improved heat dissipation, and the heat dissipation effect is greatly improved after optimization.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A conductor rotor for enhancing heat dissipation and convection, comprising a conductor rotor, a heat sink, and fixing screws; characterized in that heat sinks are evenly installed on the outer circumference of the cylindrical wall of the conductor rotor, and the heat sink is fixed to the cylindrical wall by fixing screws, and the fixing screws are hollow screws with flow holes, and the flow holes pass through the inner and outer spaces of the conductor rotor.

[0007] Furthermore, the cylindrical wall of the conductor rotor has a mounting groove, the mounting groove is recessed into the outer surface of the cylindrical wall, and the contour of the mounting groove is adapted to the heat sink.

[0008] Furthermore, a flow-conducting hole is provided on the bottom surface of the installation groove, the flow-conducting hole connects the inner and outer spaces of the cylindrical wall, and a thread is processed in the flow-conducting hole for screwing in a hollow screw.

[0009] Furthermore, a plurality of guide holes are provided and arranged axially along the conductor rotor.

[0010] Further, the heat sink includes a sheet-like substrate and a fin array;

[0011] The lower surface of the sheet-like base is installed and matched with the bottom of the installation groove, and a fin array is arranged on the upper surface thereof. The fin array includes a plurality of blades which are vertically arranged in parallel.

[0012] Furthermore, the blades and the conductor rotor axis form a certain angle, preferably 30-50 degrees.

[0013] Furthermore, mounting countersunk holes are provided in the fin array, mounting through holes are provided on the sheet-like substrate corresponding to the mounting countersunk holes, and the mounting through holes of the heat sink are arranged correspondingly to the flow-conducting holes in the mounting groove.

[0014] Furthermore, the heat sink is in the shape of a rounded rectangle or a rectangle.

[0015] Furthermore, the four corners of the rounded rectangle form rounded structures, and the radius of the rounded structures is 0.3-0.5 of the length of the short side of the rectangle.

[0016] The beneficial effects of the utility model are: greatly improving the heat dissipation performance, improving the system reliability, and being able to optimize and be used for the transformation of equipment with higher power, thus expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial three-dimensional schematic diagram of the conductor rotor;

[0018] Figure 2 is a schematic diagram of the side section of the conductor rotor;

[0019] Figure 3 It is the forward schematic diagram of the conductor rotor;

[0020] Figure 4 It is a top view schematic diagram of the heat sink;

[0021] Figure 5 It is a top view schematic diagram of the heat sink;

[0022] Figure 6 It is a schematic diagram of the cross section of a hollow screw;

[0023] Figure 7 Schematic diagram of an existing conductor rotor.

[0024] Numbers in the figure: 1 sleeve, 2 conductor rotor, 21 mounting groove, 3 heat sink, 31 mounting countersunk hole, 4 hollow screw, 5 existing conductor rotor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The conductor rotor in the utility model is applied to a permanent magnet speed regulator. The permanent magnet speed regulator comprises a conductor rotor, a permanent magnet rotor arranged inside the cylindrical conductor rotor, and an axially movable magnetic shielding mechanism arranged between the conductor rotor and the permanent magnet rotor 11 .

[0027] Among them, the permanent magnet rotor is installed on the motor drive shaft through the drive shaft coupling, and the copper conductor is installed on the rotor in the cylindrical conductor. The permanent magnet rotor is provided with permanent magnets evenly distributed along the circumference, and the cylindrical conductor rotor is installed on the load shaft through the load coupling. There is an air gap between the conductor rotor and the permanent magnet rotor, and there is no contact.

[0028] When the motor starts, the motor drive shaft drives the permanent magnet rotor to rotate, and the copper conductor inside the conductor rotor cuts the magnetic flux lines in the permanent magnet in the permanent magnet rotor, generating an induced current on the copper conductor, thereby forming an induced magnetic field. The coupling effect of the induced magnetic field and the magnetic field of the permanent magnet generates torque to drive the load to rotate.

[0029] Existing conductor rotors such as Figure 7 As shown, the conductor rotor generates eddy current heat, and the heat dissipation structure needs to be adjusted.

[0030] like Figure 1-3 As shown, the utility model provides a conductor rotor for enhancing heat dissipation convection, comprising a conductor rotor 2, a heat sink 3, and a fixing screw 4.

[0031] The conductor rotor 2 is cylindrical, and a shaft sleeve 1 is fixedly connected to the center of one end surface thereof, and the shaft sleeve 1 is installed and matched with the motor shaft or the load shaft.

[0032] The outer circumference of the cylindrical wall of the conductor rotor 2 is uniformly provided with mounting grooves 21. The mounting grooves 21 are recessed into the outer surface of the cylindrical wall, and the contour of the mounting grooves 21 is adapted to the heat sink 3, and is in the shape of a rectangle or a rounded rectangle.

[0033] A flow-conducting hole is provided on the bottom surface of the installation groove 21 , and the flow-conducting hole connects the inner and outer spaces of the cylindrical wall, and a thread is processed inside the flow-conducting hole.

[0034] A plurality of guide holes may be provided and arranged along the axial direction of the conductor rotor.

[0035] like Figure 4-5 As shown, the heat sink 3 includes a sheet-like base and a fin array.

[0036] The lower surface of the sheet substrate is installed and matched with the bottom of the installation groove 3, and a fin array is arranged on its upper surface. The fin array includes a number of parallel and vertically arranged blades. The blades and the conductor rotor axis form a certain angle, which can be selected to be 30-50 degrees.

[0037] The gaps between the blades form a gas flow path. When the conductor rotor rotates, the external airflow flows through the gaps between the blades to enhance the heat dissipation effect.

[0038] The fin array is provided with mounting countersunk holes 31, and mounting through holes are opened on the sheet-like substrate corresponding to the mounting countersunk holes 31. The mounting through holes of the heat sink are arranged correspondingly to the inner flow-conducting holes of the mounting groove.

[0039] The heat sink can be a rounded rectangle or a rectangle, and the four corners of the rounded rectangle form a rounded structure. Compared with the rectangle, the four corners are more suitable for gas flow, and the air flow is more uniform. Furthermore, the radius of the rounded structure is 0.3-0.5 of the length of the short side of the rectangle.

[0040] like Figure 6 As shown, the heat sink is fixed by a fixing screw, which is hollow and has a flow hole inside. The fixing screw is placed in the mounting countersunk hole 31 and screwed into the guide hole. The flow hole on the fixing screw constitutes a gas passage between the inside and outside of the conductor rotor.

[0041] When the conductor rotor rotates, the gas flow between the inside and outside of the conductor is achieved through the gas passage, thereby enhancing the heat dissipation effect.

[0042] In the present application, the heat sink is fixed to the conductor rotor with fixing bolts. The fixing screws are changed to hollow, and the hollow holes form a high-speed radial flow under the action of the rotating centrifugal force, effectively avoiding the flow stagnation zone, so that the heat is dissipated more effectively through the hollow holes.

[0043] Finally, it should be noted that the above description is only an explanation of the utility model and is not intended to limit the utility model. Although the utility model has been described in detail, those skilled in the art can still modify the technical solutions described above or replace some of the technical features with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A conductor rotor for enhancing heat dissipation convection, comprising a conductor rotor, a heat sink, and fixing screws; characterized in that: Heat sinks are evenly installed on the outer circumference of the cylindrical wall of the conductor rotor, and the heat sinks are fixed to the cylindrical wall by fixing screws. The fixing screws are hollow screws with flow holes that penetrate the inner and outer spaces of the conductor rotor.

2. The conductor rotor for enhancing heat dissipation convection according to claim 1, characterized in that: The cylindrical wall of the conductor rotor is provided with a mounting groove, which is recessed into the outer surface of the cylindrical wall, and the contour of the mounting groove is adapted to the heat sink.

3. The conductor rotor for enhancing heat dissipation convection according to claim 2, characterized in that: A flow-conducting hole is provided on the bottom surface of the installation groove, the flow-conducting hole connects the inner and outer spaces of the cylindrical wall, and a thread is processed in the flow-conducting hole for screwing in a hollow screw.

4. The conductor rotor for enhancing heat dissipation convection according to claim 3, characterized in that: A plurality of guide holes are provided and arranged along the axial direction of the conductor rotor.

5. The conductor rotor for enhancing heat dissipation convection according to claim 2, characterized in that: The heat sink includes a sheet-like substrate and a fin array; The lower surface of the sheet-like base is installed and matched with the bottom of the installation groove, and a fin array is arranged on the upper surface thereof. The fin array includes a plurality of blades which are vertically arranged in parallel.

6. The conductor rotor for enhancing heat dissipation convection according to claim 5, characterized in that: The blades form a certain angle with the conductor rotor axis, preferably 30-50 degrees.

7. The conductor rotor for enhancing heat dissipation convection according to claim 5, characterized in that: The fin array is provided with mounting countersunk holes, and mounting through holes are opened on the sheet-like substrate corresponding to the mounting countersunk holes. The mounting through holes of the heat sink are arranged correspondingly to the flow-conducting holes in the mounting grooves.

8. The conductor rotor for enhancing heat dissipation convection according to claim 1, characterized in that: The heat sink is in a rounded rectangle or a rectangular shape.

9. The conductor rotor for enhancing heat dissipation convection according to claim 8, characterized in that: The four corners of the rounded rectangle form a rounded structure, and the radius of the rounded structure is 0.3-0.5 of the length of the short side of the rectangle.

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