Electromagnetic brake with ultra-large suction gap

Abstract

The invention belongs to the technical field of brake devices, and discloses a super-large suction gap electromagnetic brake which comprises a magnet yoke, an armature is installed at one end of the magnet yoke, a brake disc is installed at one end of the armature, a gear sleeve is installed in the brake disc, and spring reset structures are symmetrically installed in the magnet yoke with the center point as the reference. A groove is formed in the magnet yoke, a heat absorption structure is installed at the position, located at the groove, in the magnet yoke, the heat absorption structure comprises a memory metal strip installed in the magnet yoke in a clamped mode, a heat absorption pipe is fixedly installed at one end of the memory metal strip, and heat conduction liquid and vortex stirring blades are arranged in the heat absorption pipe; according to the device, heat generated in the braking process can be more effectively distributed and absorbed, the self-rotation stirring effect of the vortex stirring blades enables heat in heat conduction liquid to be more evenly distributed, therefore, the overall heat dissipation efficiency is improved, the even heat distribution is beneficial to preventing local overheating, and the service life of the brake is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of braking devices, and particularly relates to an electromagnetic brake with an extremely large suction gap. Background Art

[0002] An electromagnetic brake is a device used to control a power system. In recent years, with the development of wind power technology, electromagnetic brakes have been increasingly widely used in wind turbine generators. Although traditional electromagnetic brakes have excellent performance, they have certain limitations in gap adjustment. On the one hand, they need to precisely adjust the gap to ensure the control effect, which results in a relatively high manufacturing cost. On the other hand, adjusting the gap requires frequent replacement of components, increasing the complexity of maintenance and replacement.

[0003] The electromagnetic brake has the characteristics of a compact structure, fast response speed, stable braking torque, high reliability, high temperature resistance, large electromagnetic force, simplified maintenance process, extended service life, and reduced maintenance cost. During the non-yaw slip process, the torque drops by about 26% compared to the initial torque, and the wear resistance of the friction material is increased by more than 1 time.

[0004] However, due to the heat generated during the friction process, and the existing electromagnetic brake has natural heat dissipation on the contact surface. When it is frequently used, it is easy to cause an increase in the temperature of the contact surface of the electromagnetic brake, resulting in an unsatisfactory braking effect of the electromagnetic brake. Summary of the Invention

[0005] In view of the problem in the prior art that due to the heat generated during the friction process, and the existing electromagnetic brake has natural heat dissipation on the contact surface. When it is frequently used, it is easy to cause an increase in the temperature of the contact surface of the electromagnetic brake, resulting in an unsatisfactory braking effect of the electromagnetic brake, the present invention proposes the following technical solutions:

[0006] An electromagnetic brake with an extremely large suction gap, including a magnetic yoke. One end of the magnetic yoke is provided with an armature, one end of the armature is provided with a brake disc, a gear sleeve is installed inside the brake disc, spring reset structures are symmetrically installed inside the magnetic yoke with the center point as a reference, a groove is opened inside the magnetic yoke, and a heat absorption structure is installed at the position of the groove inside the magnetic yoke. The heat absorption structure includes a shape memory metal strip clamped and installed inside the magnetic yoke. One end of the shape memory metal strip is fixedly installed with a heat absorption tube, ceramic heat absorption blocks are equidistantly and fixedly installed on the top surface of the heat absorption tube, and a heat conduction strip is fixedly installed between the tops of several ceramic heat absorption blocks.

[0007] Preferably, as the above technical solution, a sealing sleeve is installed at the middle part of the top of the magnetic yoke by interference fit, and a mounting rod is fixedly installed on the outer side of the magnetic yoke.

[0008] As a preference of the above technical solution, a moving ring is movably installed inside the heat absorption tube, and a magnetic ring is snap-fitted inside the moving ring.

[0009] As a preference of the above technical solution, a connecting strip is fixedly installed on the inner wall of the magnetic ring, and an eddy current stirring blade is rotatably connected to the middle of the connecting strip.

[0010] As a preference of the above technical solution, columns are equidistantly embedded and installed on the outer side of the moving ring, rollers are rotatably connected to the outer sides of the columns, and the outer sides of the rollers are in mutual contact with the inner wall of the heat absorption tube.

[0011] As a preference of the above technical solution, a one-way bearing is installed on the inner wall of the roller by interference fit, and the inner ring of the one-way bearing and the outer side of the column are installed by interference fit.

[0012] As a preference of the above technical solution, the number ratio of the columns to the rollers is one to two.

[0013] As a preference of the above technical solution, one end face of the heat conduction strip is in mutual contact with one end face of the magnetic yoke, and the outer side of the heat conduction strip is in mutual contact with the inner wall of the magnetic yoke.

[0014] As a preference of the above technical solution, the shape of the middle part of the eddy current stirring blade is conical.

[0015] The beneficial effects of the present invention are as follows:

[0016] (1) By arranging a heat conduction liquid and an eddy current stirring blade inside the heat absorption tube, the device can more effectively distribute and absorb the heat generated during the braking process. The self-rotation stirring action of the eddy current stirring blade makes the heat distribution inside the heat conduction liquid more uniform, thereby improving the overall heat dissipation efficiency. This uniform heat distribution helps to prevent local overheating and prolong the service life of the brake.

[0017] (2) Since the heat is more effectively absorbed and dispersed, the stability and reliability of the brake under high load or continuous braking conditions are enhanced, and the risk of brake failure caused by overheating is reduced.

[0018] (3) This design simplifies the maintenance process because the fixed installation of components reduces the possibility of wear and failure. At the same time, the automatic reset function reduces the need for manual intervention, improving the reliability of the system and the convenience of maintenance. Description of the Drawings

[0019] Figure 1 The figure shows the structural schematic diagram of a super-large suction gap electromagnetic brake in Embodiment 1;

[0020] Figure 2 The figure shows the cross-sectional view of a super-large suction gap electromagnetic brake in Embodiment 1;

[0021] Figure 3 Shown is a schematic structural diagram of the endothermic structure in Embodiment 1;

[0022] Figure 4 Shown is a cross-sectional view of the endothermic structure in Embodiment 1;

[0023] Figure 5 Shown is a schematic structural diagram of the eddy current stirring blade in Embodiment 1;

[0024] Figure 6 Shown is Figure 5 a schematic structural diagram of Area A in

[0025] In the figure: 1, yoke; 2, sealing sleeve; 3, mounting rod; 4, armature; 5, brake disc; 6, gear sleeve; 7, spring return structure; 8, groove; 9, endothermic structure; 91, shape memory metal strip; 92, endothermic tube; 93, ceramic endothermic block; 94, heat conduction strip; 95, moving ring; 96, magnetic ring; 97, connecting strip; 98, eddy current stirring blade; 99, column; 910, one-way bearing; 911, roller. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0027] Embodiment 1: The present invention provides an electromagnetic brake with an extremely large suction gap, as Figures 1 to 6 shown, including: a yoke 1, an armature 4 is installed at one end of the yoke 1, a brake disc 5 is installed at one end of the armature 4, a gear sleeve 6 is installed inside the brake disc 5, a spring return structure 7 is symmetrically installed inside the yoke 1 with the center point as the reference, a groove 8 is opened inside the yoke 1, through a sub-region magnetic field design of the yoke 1, the central axial magnetic field drives the linear movement of the armature 4, and the peripheral multi-pole magnetic field acts with the magnetic ring 96 to generate a rotational torque. In terms of the pole setting, the center of the yoke is of a single polarity, and the periphery forms a multi-pole phase difference pairing with the magnetic ring 96 to achieve the coordination of the two movements. An endothermic structure 9 is installed inside the yoke 1 at the position of the groove 8. The endothermic structure 9 includes a shape memory metal strip 91 clamped and installed inside the yoke 1. The shape memory metal strip 91 is used for connection and generates a reset after being pressed. One end of the shape memory metal strip 91 is fixedly installed with an endothermic tube 92. A heat conduction liquid is provided inside the endothermic tube 92, and the heat conduction liquid is water. Ceramic endothermic blocks 93 are equidistantly and fixedly installed on the top outer surface of the endothermic tube 92. A heat conduction strip 94 is fixedly installed between the tops of several ceramic endothermic blocks 93.

[0028] As Figure 1 and Figure 2 shown, a sealing sleeve 2 is installed at the middle part of the top of the yoke 1 through interference fit, and a mounting rod 3 is fixedly installed on the outside of the yoke 1;

[0029] Under the action of the installation rod 3, it is convenient to take and fix the yoke 1, and under the action of the sealing sleeve 2, the edge of the inner wall of one end face of the yoke 1 is protected, thereby increasing the service life of the yoke 1.

[0030] As Figure 2 and Figure 4 shown, a moving ring 95 is movably installed inside the heat absorption tube 92, a magnetic ring 96 is snap-fitted inside the moving ring 95, and the material of the magnetic ring 96 is a permanent magnet;

[0031] Under the action of the moving ring 95, the magnetic ring 96 is driven to move, changing the difficulty of moving the position of the magnetic ring 96.

[0032] As Figure 4 and Figure 5 shown, a connecting strip 97 is fixedly installed on the inner wall of the magnetic ring 96, and an eddy current stirring blade 98 is rotatably connected to the middle of the connecting strip 97;

[0033] Under the action of the connecting strip 97, it is used for the installation and limitation of the eddy current stirring blade 98. Since the magnetic ring 96 moves, the eddy current stirring blade 98 rotates due to the blockage of water. When the eddy current stirring blade 98 rotates, the water is stirred, making the water more uniform and further facilitating the subsequent absorption of heat.

[0034] As Figure 5 and Figure 6 shown, columns 99 are equidistantly embedded on the outer side of the moving ring 95, rollers 911 are rotatably connected to the outer sides of the columns 99, and the outer sides of the rollers 911 are in mutual contact with the inner wall of the heat absorption tube 92, which can facilitate the limitation of the rollers 911 and prevent the problem of displacement of the rollers 911.

[0035] As Figure 5 and Figure 6 shown, a one-way bearing 910 is installed on the inner wall of the roller 911 by interference fit, and the inner ring of the one-way bearing 910 and the outer side of the column 99 are installed by interference fit;

[0036] It can facilitate the adjustment of the direction of the roller 911 and prevent the problem of left and right mutual movement of the roller 911.

[0037] As Figure 5 and Figure 6 shown, the quantity ratio of the columns 99 to the rollers 911 is one to two;

[0038] The two rollers 911 make the moving ring 95 move more stably.

[0039] As Figure 1 and Figure 2As shown, one end face of the heat conduction strip 94 is in close contact with one end face of the yoke 1, and the outer side of the heat conduction strip 94 is in close contact with the inner wall of the yoke 1, facilitating the absorption of heat during the operation of the electromagnetic brake.

[0040] As Figure 5 and Figure 6 shown, the shape of the middle part of the eddy current stirring blade 98 is conical, changing the resistance between the liquid and the eddy current stirring blade 98, thus facilitating the rotation of the eddy current stirring blade 98.

[0041] Working principle: During the actual use of the device, the yoke 1 is fixedly installed, and components such as the armature 4, the brake disc 5, and the gear sleeve 6 are all installed in place. At this time, the spring reset structure 7 is in the initial state, ready to perform a reset operation when needed. The heat absorption tube 92 inside the heat absorption structure 9 is filled with heat-conducting liquid water. When the electromagnetic brake needs to work, an electric current passes through the yoke 1 to generate a magnetic field. The magnetic field in the central axis direction of the yoke 1 directly acts on the armature 4, and the magnetic field direction is perpendicular to the plane of the brake disc 5, forming an electromagnetic attraction force to realize axial movement and attract the armature 4. Furthermore, the brake disc 5 is brought into contact with the gear sleeve 6 to achieve braking. The heat generated during the braking process is transmitted to the heat absorption structure 9 through the yoke 1. At this time, the heat conduction strip 94 adsorbs the heat, and the adsorbed heat enters the ceramic heat absorption block 93. And under the action of the ceramic heat absorption block 93, the heat is adsorbed, so that the ceramic heat absorption block 93 conducts the heat into the heat absorption tube 92. The water inside the heat absorption tube 92 serves as a heat-conducting liquid and starts to absorb heat. When the N pole on the periphery of the yoke 1 aligns with the S pole of the magnetic ring 96, it attracts, and when the N pole of the next pole approaches the N pole of the magnetic ring 96, it repels, forming a continuous rotational torque. At this time, the magnetic drive magnetic ring 96 moves, and when the magnetic ring 96 moves, it drives the moving ring 95 to move inside the heat absorption tube 92. At this time, the moving ring 95 is in close contact with the inner wall of the heat absorption tube 92 through the roller 911 and rotates. When the roller 911 rotates, it only allows one-way rotation under the action of the one-way bearing 910. When the braking ends and the current is disconnected and the magnetic field disappears, the movement of the magnetic ring 96 causes the eddy current stirring blade 98 connected to it to generate self-rotation. The self-rotation of the eddy current stirring blade 98 stirs the water, making the heat distribution in the water more uniform and improving the heat absorption efficiency. The ceramic heat absorption block 93 and the heat conduction strip 94 work together to block the outward transfer of heat. At the same time, the ceramic heat absorption block 93 absorbs heat, and the design of the heat conduction strip 94 enables the heat to be absorbed more effectively, reducing heat loss. And under the push of the spring reset structure 7, the armature 4 is reset, the brake disc 5 is separated from the gear sleeve 6, the braking is released, and the system returns to the initial state, ready for the next braking.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. An ultra-large pull-in gap electromagnetic brake, characterized in that: The invention comprises a yoke (1), wherein an armature (4) is mounted on one end of the yoke (1), a brake disc (5) is mounted on one end of the armature (4), a gear sleeve (6) is mounted inside the brake disc (5), a spring return structure (7) is symmetrically mounted inside the yoke (1) with the center point as a reference, a groove (8) is provided inside the yoke (1), a heat absorption structure (9) is mounted inside the yoke (1) at the position of the groove (8), the heat absorption structure (9) comprises a memory metal strip (91) mounted inside the yoke (1) by snap-fitting, a heat absorption tube (92) is fixedly mounted on one end of the memory metal strip (91), a ceramic heat absorption block (93) is fixedly mounted at equal distances on the top of the outer surface of the heat absorption tube (92), and a heat conducting strip (94) is fixedly mounted between the tops of a plurality of the ceramic heat absorption blocks (93).

2. The ultra-large pull-in gap electromagnetic brake according to claim 1, characterized in that: A sealing sleeve (2) is installed at the middle part of the top end of the magnetic yoke (1) through interference fit, and a mounting rod (3) is fixedly installed on the outside of the magnetic yoke (1).

3. The ultra-large pull-in gap electromagnetic brake according to claim 1, characterized in that: A moving ring (95) is movably installed inside the heat absorption tube (92), and a magnetic ring (96) is clamped and installed inside the moving ring (95).

4. The ultra-large pull-in gap electromagnetic brake according to claim 3, characterized in that: A connecting strip (97) is fixedly mounted on the inner wall of the magnetic ring (96), and a vortex stirring blade (98) is rotatably connected to the middle of the connecting strip (97).

5. The ultra-large pull-in gap electromagnetic brake according to claim 4, characterized in that: The outer side of the moving circle (95) is equidistantly embedded with upright posts (99), the outer side of the upright posts (99) is rotatably connected with a roller (911), and the outer side of the roller (911) and the inner wall of the heat absorbing tube (92) are in contact with each other.

6. The ultra-large pull-in gap electromagnetic brake according to claim 5, characterized in that: A one-way bearing (910) is installed on the inner wall of the roller (911) by interference fit, and the inner ring of the one-way bearing (910) and the outer side of the column (99) are installed by interference fit.

7. The ultra-large pull-in gap electromagnetic brake according to claim 5, characterized in that: The number of the uprights (99) and the number of the rollers (911) is one to two.

8. The ultra-large pull-in gap electromagnetic brake according to claim 1, characterized in that: One end surface of the heat-conducting strip (94) and one end surface of the magnetic yoke (1) are in contact with each other, and the outer side of the heat-conducting strip (94) and the inner wall of the magnetic yoke (1) are in contact with each other.

9. The ultra-large pull-in gap electromagnetic brake according to claim 4, characterized in that: The middle portion of the vortex stirring blade (98) is in a conical shape.

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