High-speed rotor driving balance self-adjusting counterweight ring

Abstract

The utility model relates to the technical field of high-speed rotors, in particular to a high-speed rotor for driving a balance self-adjusting counterweight ring, which comprises a rotor, a rotating shaft is arranged on the rotor, balance rings are arranged on the left side and the right side of the rotor, an annular opening is arranged on one side of each balance ring far away from the rotor, an inner ring groove and an outer ring groove are arranged on the inner wall of each annular opening, and a counterweight piece is arranged in each annular opening. The counterweight piece comprises a rectangular fixed block, an inner positioning block is arranged on one side, close to the inner ring groove, of the rectangular fixed block, an outer positioning block is arranged on one side, close to the outer ring groove, of the rectangular fixed block, a threaded hole is formed in one side, away from the rotor, of the rectangular fixed block, the threaded hole is in threaded connection with a threaded column, and a counterweight block is arranged at the outer end of the threaded column. According to the high-speed rotor for driving the balance self-adjusting counterweight ring, the characteristic that the counterweight piece flexibly moves in the annular opening of the balance ring is utilized, the positions of the counterweight blocks are allowed to be freely adjusted along the annular track, the dynamic unbalance amount of the rotor can be accurately compensated by combining the counterweight blocks with different weights, and the operation complexity of multiple times of disassembly and calibration is reduced.

Description

High-speed rotor driving the self-adjusting counterweight ring Technical Field

[0001] This utility model relates to the field of high-speed rotor technology, specifically to a high-speed rotor that drives a self-adjusting counterweight ring. Background Technology

[0002] High-speed rotors are one of the core components of various rotating machinery. Their defining characteristic is their extremely high rotational speed, typically reaching thousands or even tens of thousands of revolutions per minute. At such high speeds, even a slight imbalance can lead to significant centrifugal force, causing mechanical vibration, increased noise, and even equipment damage. Therefore, ensuring the balance of high-speed rotors, especially their dynamic balance, is crucial for the machine's operating efficiency, reliability, and lifespan. Dynamic balancing is a method of eliminating rotational imbalance by adjusting the rotor's mass distribution. The goal is to align the rotor's center of gravity with the axis of rotation, thereby reducing or eliminating vibration during operation. In practical applications, dynamic balancing of high-speed rotors is usually achieved through counterweights, but traditional designs suffer from efficiency and reliability issues.

[0003] Patent CN211908488U discloses a rotor structure for a high-speed motor, comprising: a rotor body, and counterweights located on both sides of the rotor body; the rotor structure further includes balance end plates fixed at both ends of the rotor body; and a balance part is respectively provided on the end face of the two balance end plates; one of the balance parts can limit one of the counterweights, and by adjusting the weight of any of the counterweights to achieve dynamic balance of the rotor body, this design prevents the counterweights from loosening or even falling off after long-term use by limiting the counterweights with the balance parts, thus ensuring the stable operation of the motor.

[0004] The existing technology described above mainly relies on replacing counterweights of different weights to dynamically balance the rotor during practical application. However, this method has some significant drawbacks. First, the counterweights are usually made of counterweight clay. After the counterweights are installed in the balancing section, it is necessary to wait for the clay to completely solidify before dynamic balancing tests can be performed. However, newly installed counterweight clay is difficult to fix quickly within the balancing section, affecting the efficiency of dynamic balancing tests. Second, after solidification, the counterweight clay is difficult to remove, and rotor dynamic balancing calibration often requires multiple adjustments. This characteristic of being difficult to move after solidification further increases the difficulty of calibration, seriously affecting the equipment's commissioning cycle and operational convenience. To address these issues, we propose a high-speed rotor that drives a self-adjusting counterweight ring. Dynamic balancing calibration is achieved by adjusting the position of the counterweight blocks in the counterweight ring, thereby significantly improving adjustment efficiency and reducing operational difficulty. Summary of the Invention

[0005] The purpose of this invention is to provide a high-speed rotor that drives a self-adjusting counterweight ring to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-speed rotor driving a self-adjusting counterweight ring includes a rotor, as shown in Figures 1 and 5. The rotor has a rotating shaft, which provides support for the rotation axis and transmits torque to external equipment. Balance rings are provided on both the left and right sides of the rotor. These balance rings are used to install counterweights for dynamic balance adjustment. An annular opening is provided on the side of the balance ring furthest from the rotor, serving as an installation channel for the counterweights and allowing them to adjust their position along an annular trajectory. An inner annular groove is provided on the inner wall of the annular opening, near the rotating shaft, to cooperate with an inner positioning block and limit the radial displacement of the counterweights. An outer annular groove is provided on the inner wall of the annular opening, furthest from the rotating shaft, to cooperate with an outer positioning block and prevent circumferential displacement of the counterweights.

[0008] As shown in Figures 3 and 5, a counterweight is provided inside the annular opening. The counterweight compensates for the rotor's imbalance by adjusting its position and weight. The counterweight includes a rectangular block, which serves as the mounting base for connecting the inner and outer positioning blocks. The inner positioning block is located on the side of the rectangular block closest to the inner annular groove. The inner positioning block achieves radial positioning by fitting with the inner annular groove through an inner arc-shaped groove. The outer positioning block is located on the side of the rectangular block closest to the outer annular groove. The outer positioning block achieves circumferential fixation by fitting with the outer annular groove through an outer arc-shaped protrusion. A threaded hole is provided on the side of the rectangular block away from the rotor. The threaded hole is used to thread a threaded post to fix the counterweight. The threaded post is threaded to the threaded hole. The counterweight can be quickly installed or removed by rotating the threaded post. The tightening direction of the threaded post is consistent with the rotation direction of the rotor. A counterweight is provided at the outer end of the threaded post. The counterweight provides adjustable weight to eliminate the rotor's imbalance.

[0009] The counterweights come in various models with different weights to accommodate rotor dynamic balance adjustments. When calibrating the rotor's dynamic balance, operators only need to rotate the counterweights to tighten or loosen the threaded posts, allowing for quick replacement of counterweights of different weights. This effectively reduces operation time during dynamic balance adjustments. Furthermore, the number of counterweights can be increased or decreased as needed, and their position within the annular opening can be adjusted arbitrarily, making it easier for operators to perform dynamic balance adjustments on the rotor.

[0010] Preferably, as shown in Figure 4, the rectangular fixed block is located inside the annular opening. The rectangular fixed block moves along the annular opening to adjust the position of the counterweight. The inner positioning block and the outer positioning block can pass through the annular opening. After passing through the annular opening, the inner positioning block and the outer positioning block cooperate with the inner annular groove and the outer annular groove for fixation.

[0011] Preferably, as shown in Figures 3 and 4, the inner positioning block has an inner arc-shaped groove at the end away from the rectangular fixed block. The concave surface of the inner arc-shaped groove fits against the arc surface of the inner wall of the inner ring groove, and the fit between the arc surface of the inner arc-shaped groove and the inner wall of the inner ring groove enhances contact stability.

[0012] The outer positioning block has an outer arc-shaped protrusion at one end away from the rectangular fixed block. The convex surface of the outer arc-shaped protrusion fits against the arc surface of the inner wall of the outer ring groove to prevent the counterweight from loosening.

[0013] Preferably, as shown in Figures 2 and 5, when the threaded post is tightened, the side of the counterweight near the rotor abuts against the side of the balance ring, and the counterweight abuts against the side of the balance ring to provide axial fixation;

[0014] Preferably, when the threaded column is tightened, the side of the inner positioning block away from the rotor abuts against the inner wall of the inner ring groove, and the inner positioning block abuts against the inner ring groove to limit the radial displacement of the counterweight. The side of the outer positioning block away from the rotor abuts against the inner wall of the outer ring groove, and the outer positioning block abuts against the outer ring groove to limit the circumferential displacement of the counterweight, thereby improving the stability of the counterweight.

[0015] Preferably, as shown in Figure 1, the balance ring is interference-fitted with the rotating shaft. The interference fit ensures a tight connection between the balance ring and the rotating shaft. The balance ring is fixedly installed on the side of the rotor. The fixed installation can be done by bolts or welding. The balance ring achieves synchronous rotation with the rotor through the fixed installation.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The high-speed rotor that drives the self-adjusting counterweight ring can quickly install and remove the counterweight through a threaded connection. It can be adjusted in real time without waiting for the counterweight mud to solidify, which significantly improves the efficiency of dynamic balance calibration and shortens the equipment debugging cycle.

[0018] 2. The high-speed rotor that drives the self-adjusting counterweight ring utilizes the characteristic that the counterweight can move flexibly within the annular opening of the balance ring, allowing the counterweight to be freely adjusted along the annular trajectory. By combining counterweights of different weights, the dynamic imbalance of the rotor can be accurately compensated, reducing the complexity of multiple disassembly and calibration operations.

[0019] 3. The high-speed rotor that drives the self-adjusting counterweight ring enhances the radial and circumferential stability of the counterweight by the arc-shaped fit between the inner positioning block and the inner ring groove, and the concave-convex fit between the outer positioning block and the outer ring groove. This prevents the counterweight from shifting or falling off due to vibration during high-speed rotation, ensuring long-term operational reliability. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 is a schematic diagram of the assembly structure of the balance ring and counterweight in this utility model;

[0022] Figure 3 is an exploded structural diagram of the counterweight in this utility model;

[0023] Figure 4 is one of the partial structural schematic diagrams of this utility model;

[0024] Figure 5 is a second partial structural schematic diagram of this utility model;

[0025] In the diagram: 1. Rotor; 2. Shaft; 3. Balance ring; 30. Annular opening; 31. Inner annular groove; 32. Outer annular groove; 4. Counterweight; 40. Rectangular block; 400. Threaded hole; 41. Inner positioning block; 410. Inner arc-shaped groove; 42. Outer positioning block; 420. Outer arc-shaped protrusion; 43. Counterweight; 44. Threaded column. Detailed Implementation

[0026] 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.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Please refer to Figures 1-5. This utility model provides a technical solution:

[0029] A high-speed rotor driving a self-adjusting counterweight ring includes a rotor 1, as shown in Figures 1 and 5. The rotor 1 is provided with a rotating shaft 2, which provides support for the rotation axis and transmits torque to external equipment. Balance rings 3 are provided on both the left and right sides of the rotor 1. The balance rings 3 are used to install counterweights 4 to achieve dynamic balance adjustment. An annular opening 30 is provided on the side of the balance ring 3 away from the rotor 1. The annular opening 30 serves as an installation channel for the counterweights 4, allowing them to adjust their position along an annular trajectory. An inner annular groove 31 is provided on the inner wall of the annular opening 30 and on the side closer to the rotating shaft 2. The inner annular groove 31 is used to cooperate with the inner positioning block 41 to limit the radial displacement of the counterweights 4. An outer annular groove 32 is provided on the inner wall of the annular opening 30 and on the side away from the rotating shaft 2. The outer annular groove 32 is used to cooperate with the outer positioning block 42 to prevent the counterweights 4 from shifting circumferentially.

[0030] Referring to Figures 3 and 5, a counterweight 4 is provided inside the annular opening 30. The counterweight 4 compensates for the imbalance of the rotor 1 by adjusting its position and weight. The counterweight 4 includes a rectangular fixed block 40, which serves as the mounting base for connecting the inner positioning block 41 and the outer positioning block 42. The inner positioning block 41 is located on the side of the rectangular fixed block 40 near the inner annular groove 31. The inner positioning block 41 achieves radial positioning by fitting with the inner annular groove 31 through an inner arc-shaped groove 410. The outer positioning block 42 is located on the side of the rectangular fixed block 40 near the outer annular groove 32. 2. The outer arc-shaped protrusion 420 fits into the outer ring groove 32 to achieve circumferential fixation. The rectangular fixed block 40 has a threaded hole 400 on the side away from the rotor 1. The threaded hole 400 is used to thread the threaded post 44 to fix the counterweight block 43. The threaded hole 400 is threaded to the threaded post 44. The threaded post 44 can be rotated to achieve quick installation or removal of the counterweight block 43. The tightening direction of the threaded post 44 is consistent with the rotation direction of the rotor 1. The outer end of the threaded post 44 is provided with a counterweight block 43. The counterweight block 43 provides adjustable weight to eliminate the imbalance of the rotor 1.

[0031] The counterweight 43 comes in various models with different weights to accommodate the dynamic balance adjustment of the rotor 1. When calibrating the dynamic balance of the rotor 1, the operator only needs to rotate the counterweight 43 to tighten or loosen the threaded column 44, thereby quickly replacing the counterweight 43 with different weights, effectively reducing the operation time during the dynamic balance adjustment process. Furthermore, the number of counterweights 4 can be increased or decreased according to needs, and the position of the counterweights 4 within the annular opening 30 can be adjusted arbitrarily, making it easier for the operator to perform dynamic balance adjustment on the rotor 1.

[0032] In this embodiment, as shown in Figure 4, the rectangular fixed block 40 is located inside the annular opening 30. The rectangular fixed block 40 moves along the annular opening 30 to realize the position adjustment of the counterweight 4. The inner positioning block 41 and the outer positioning block 42 can pass through the annular opening 30. After passing through the annular opening 30, the inner positioning block 41 and the outer positioning block 42 cooperate with the inner annular groove 31 and the outer annular groove 32 for fixation.

[0033] Specifically, as shown in Figures 3 and 4, the inner positioning block 41 has an inner arc-shaped groove 410 at the end away from the rectangular fixed block 40. The concave surface of the inner arc-shaped groove 410 fits against the arc surface of the inner wall of the inner ring groove 31. The fit between the arc surface of the inner arc-shaped groove 410 and the inner wall of the inner ring groove 31 enhances the contact stability.

[0034] The outer positioning block 42 has an outer arc-shaped protrusion 420 at one end away from the rectangular fixed block 40. The convex surface of the outer arc-shaped protrusion 420 fits against the arc surface of the inner wall of the outer ring groove 32. The fit between the convex surface of the outer arc-shaped protrusion 420 and the inner wall of the outer ring groove 32 prevents the counterweight 4 from becoming loose.

[0035] Furthermore, as shown in Figures 2 and 5, when the threaded post 44 is tightened, the side of the counterweight 43 near the rotor 1 abuts against the side of the balance ring 3, and the counterweight 43 abuts against the side of the balance ring 3 to provide axial fixation.

[0036] Furthermore, when the threaded post 44 is tightened, the side of the inner positioning block 41 away from the rotor 1 abuts against the inner wall of the inner ring groove 31. The inner positioning block 41 abuts against the inner ring groove 31 to limit the radial displacement of the counterweight 4. The side of the outer positioning block 42 away from the rotor 1 abuts against the inner wall of the outer ring groove 32. The outer positioning block 42 abuts against the outer ring groove 32 to limit the circumferential displacement of the counterweight 4, thereby improving the stability of the counterweight 4.

[0037] Furthermore, as shown in Figure 1, the balance ring 3 is interference-fitted with the rotating shaft 2. The interference fit ensures a tight connection between the balance ring 3 and the rotating shaft 2. The balance ring 3 is fixedly installed on the side of the rotor 1. The fixed installation can be achieved by bolts or welding. The balance ring 3 achieves synchronous rotation with the rotor 1 through the fixed installation.

[0038] In this embodiment, when the high-speed rotor driving the self-adjusting counterweight ring is in use, the rectangular fixed block 40 of the counterweight 4 is moved to the desired position along the annular opening 30 of the balance ring 3. Then, the rectangular fixed block 40 is rotated in the rotation direction of the rotor 1, so that the inner arc-shaped groove 410 of the inner positioning block 41 fits with the arc surface of the inner annular groove 31, and the outer arc-shaped protrusion 420 of the outer positioning block 42 fits with the arc surface of the outer annular groove 32, thus completing the radial and circumferential positioning of the counterweight 4. Next, the counterweight 43 is connected to the threaded hole 400 of the rectangular fixed block 40 through the threaded post 44. The counterweight 43 is rotated to tighten the threaded post 44, so that the side of the counterweight 43 closest to the rotor 1 presses against the side of the balance ring 3. Meanwhile, the inner positioning block 41 and the outer positioning block 42 respectively press against the inner walls of the inner ring groove 31 and the outer ring groove 32 to achieve axial fixation of the counterweight 4; according to the dynamic balance test results, select counterweight blocks 43 of different weights or adjust the position of the counterweight 4 in the annular opening 30, and quickly replace or move the counterweight 4 by rotating the counterweight block 43 until the vibration value of the rotor 1 meets the requirements; during high-speed operation, the tightening direction of the threaded column 44 is consistent with the rotation direction of the rotor 1, which can prevent the counterweight block 43 from loosening due to centrifugal force; if recalibration is required, simply rotate the counterweight block 43 in the opposite direction to loosen the threaded column 44, and the counterweight 4 can be disassembled or moved, greatly simplifying the debugging process.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-speed rotor that drives a self-adjusting counterweight ring, comprising a rotor (1), wherein the rotor (1) is provided with a rotating shaft (2), characterized in that: The rotor (1) is provided with balance rings (3) on both the left and right sides. The balance ring (3) has an annular opening (30) on the side away from the rotor (1). The inner wall of the annular opening (30) and the side near the rotating shaft (2) has an inner annular groove (31). The inner wall of the annular opening (30) and the side away from the rotating shaft (2) has an outer annular groove (32). The annular opening (30) is provided with a counterweight (4). The counterweight (4) includes a rectangular block (40). The rectangular block (40) has an inner positioning block (41) on the side near the inner annular groove (31). The rectangular block (40) has an outer positioning block (42) on the side near the outer annular groove (32). The rectangular block (40) has a threaded hole (400) on the side away from the rotor (1). The threaded hole (400) is threaded with a threaded post (44). The outer end of the threaded post (44) is provided with a counterweight (43).

2. The high-speed rotor driving the self-adjusting counterweight ring according to claim 1, characterized in that: The rectangular fixed block (40) is located inside the annular opening (30), and the inner positioning block (41) and the outer positioning block (42) can pass through the annular opening (30).

3. The high-speed rotor driving the self-adjusting counterweight ring according to claim 1, characterized in that: The inner positioning block (41) has an inner arc-shaped groove (410) at one end away from the rectangular fixed block (40), and the concave surface of the inner arc-shaped groove (410) fits against the arc surface of the inner wall of the inner ring groove (31).

4. The high-speed rotor driving the self-adjusting counterweight ring according to claim 1, characterized in that: The outer positioning block (42) has an outer arc-shaped protrusion (420) at one end away from the rectangular fixed block (40), and the convex surface of the outer arc-shaped protrusion (420) is in contact with the arc surface of the inner wall of the outer ring groove (32).

5. The high-speed rotor driving the self-adjusting counterweight ring according to claim 1, characterized in that: When the threaded post (44) is tightened, the side of the counterweight (43) near the rotor (1) abuts against the side of the balance ring (3).

6. The high-speed rotor driving the self-adjusting counterweight ring according to claim 1, characterized in that: When the threaded post (44) is tightened, the side of the inner positioning block (41) away from the rotor (1) abuts against the inner wall of the inner ring groove (31), and the side of the outer positioning block (42) away from the rotor (1) abuts against the inner wall of the outer ring groove (32).

7. The high-speed rotor driving the self-adjusting counterweight ring according to claim 1, characterized in that: The balance ring (3) is interference-fitted with the shaft (2), and the balance ring (3) is fixedly installed on the side of the rotor (1).

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