Dynamic balance finding inner fan for large motor

Abstract

The utility model provides a dynamic balance finding inner fan for a large-scale motor, which comprises a balancing stand, a balancing block, a fan plate, fan blades and a ventilating duct, a through hole is arranged at the center of the fan plate, the ventilating duct is fixedly assembled at the through hole and communicated with the through hole, and the balancing block is assembled on the balancing stand. According to the balance frame, balance weight can be freely carried out at 360 degrees in the circumference, and different angles can be met; the rotating track of the inner fan is round after weight balancing, and the balance block can be fixed in the balance frame anywhere, namely, the balance weight can be randomly carried out at 360 degrees on the circumference of the inner fan to help the rotor to realize balance. The fan circumference counterweight in a large motor is difficult; an inner fan with a balancing frame is designed at present, the balancing frame is provided with a circular-truncated-cone-shaped groove, and a balancing block can be fixed in the circular-truncated-cone-shaped groove anywhere, namely 360-degree random balance weight of the circumference of the inner fan is achieved, and therefore it is effectively guaranteed that the rotating track of the inner fan is circular.

Description

Technical Field

[0001] The utility model relates to an internal fan of a motor, in particular to a dynamic balance internal fan for a large motor. Background Technique

[0002] The operating environment of the motor is special. The operation of the motor is an energy conversion process, converting electrical energy into mechanical energy or mechanical energy into electrical energy. During the process of transmitting mechanical energy, it is output to the shaft through the rotation of the rotor. During the manufacturing process of the rotor, eccentricity will occur, causing the rotor not to rotate around the axis when rotating. From the outer surface of the rotor, the rotation trajectory is not circular but elliptical, which is caused by the eccentricity of the rotor. Currently, it is necessary to design balance weights to be installed on the rotor so that the eccentric part of the rotor's center of gravity can be weighted, enabling the rotor to rotate along a circular trajectory. Importantly, the balance weights cannot fall off during high-speed rotation, otherwise it will damage the motor. Therefore, a balance weight with a self-locking function needs to be designed. Summary of the Invention

[0003] The purpose of the utility model is to provide a dynamic balance internal fan for a large motor. The internal fan rotates together with the motor, which can play a role in dissipating heat inside the motor. The internal fan of a large motor has a large volume. During the rotation process of the fan, due to centrifugal force and air resistance, it is prone to overweight phenomenon.

[0004] A dynamic balance internal fan for a large motor includes a balance frame, balance weights, a fan plate, fan blades, and a wind guide cylinder. The fan blades are fixedly assembled on the fan plate. A through hole is opened at the center position of the fan plate. The wind guide cylinder is fixedly assembled at the through hole and is communicated with the through hole. The balance weights are assembled on the balance frame.

[0005] Preferably, a frustum-shaped groove is opened on the balance frame, and the balance weights are assembled in the frustum-shaped groove.

[0006] Preferably, screws are used to fix the balance weights in the frustum-shaped groove.

[0007] The balance frame of the utility model can be randomly weighted at 360° around the circumference to meet different angles. After weighting, the rotation trajectory of the internal fan is circular. The balance weights can be fixed anywhere in the balance frame, that is, randomly weighted at 360° around the circumference of the internal fan to help the rotor achieve balance. It is difficult to weight the circumference of the internal fan of a large motor. Currently, an internal fan with a balance frame is designed. The balance frame is provided with a frustum-shaped groove, and the balance weights can be fixed anywhere in the frustum-shaped groove, that is, randomly weighted at 360° around the circumference of the internal fan, effectively ensuring that the rotation trajectory of the internal fan is circular. Description of the Drawings

[0008] Figure 1 It is a schematic structural diagram of a dynamic balance internal fan for a large motor from one perspective;

[0009] Figure 2Schematic diagram of the partial structure of the balance bracket;

[0010] Figure 3 Schematic diagram of the structure of the balance bracket from one perspective;

[0011] Figure 4 Schematic diagram of the structure of the balance bracket from another perspective;

[0012] In the figure: balance bracket 1, frustum-shaped groove b, balance weight 2, fan plate 3, through hole a, fan blade 4, air guide cylinder 5. Specific implementation mode

[0013] In order to make the technical solution of the present utility model easier to understand, the technical solution of the present utility model will be clearly and completely described by way of specific embodiments in conjunction with the accompanying drawings.

[0014] Please refer to Figure 1 , Figure 2 and Figure 3 , the internal fan for dynamic balance finding of large motors includes a balance bracket 1, a balance weight 2, a fan plate 3, fan blades 4 and an air guide cylinder 5. The fan blades 4 are fixedly assembled on the fan plate 3. A through hole a is opened at the central position of the fan plate 3. The air guide cylinder 5 is fixedly assembled at the through hole a and is communicated with the through hole a. The balance weight 2 is assembled on the balance bracket 1. A frustum-shaped groove b is opened on the balance bracket 1. The balance weight 2 is assembled in the frustum-shaped groove b. The balance weight 2 is fixed in the frustum-shaped groove b with M8 screws.

[0015] The balance bracket 1 of the present utility model can be randomly weighted at 360° around the circumference to meet different angles; after weighting, the rotation trajectory of the internal fan is circular. The balance weight 2 can be fixed anywhere in the balance bracket 1, that is, randomly weighted at 360° around the circumference of the internal fan to help the rotor achieve balance. It is difficult to weight the circumference of the internal fan of large motors; now an internal fan with a balance bracket is designed. The balance bracket 1 is provided with a frustum-shaped groove b. The balance weight 2 can be fixed anywhere in the frustum-shaped groove b, that is, randomly weighted at 360° around the circumference of the internal fan, which effectively ensures that the rotation trajectory of the internal fan is circular.

[0016] It should be noted that the embodiments described herein are only partial embodiments of the present utility model, rather than all implementation manners of the present utility model. The embodiments are only exemplary, and their functions are only to provide a more intuitive and clear way to understand the content of the present utility model, rather than a limitation on the technical solution of the present utility model. Without departing from the concept of the present utility model, all other implementation manners that can be thought of by those of ordinary skill in the art without creative labor, as well as other simple substitutions and various changes to the technical solution of the present utility model, all belong to the protection scope of the present utility model.

Claims

1. A dynamically balanced inner fan for a large motor, characterized in that: The dynamically balanced internal fan for large motors includes a balance frame, a balance block, a fan plate, fan blades and an air guide tube. The fan blades are fixedly mounted on the fan plate. A through hole is provided at the center of the fan plate. The air guide tube is fixedly mounted at the through hole and communicates with the through hole. The balance block is mounted on the balance frame.

2. The dynamically balanced inner fan for large motors according to claim 1, characterized in that: A truncated cone-shaped groove is arranged on the balancing frame, and the balancing block is arranged in the truncated cone-shaped groove.

3. The dynamically balanced inner fan for large motors according to claim 2, characterized in that: The balancing weight is fixed in the truncated cone-shaped groove by screws.

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