Dynamic balance weighting support

Abstract

The utility model discloses a dynamic balance weighting support, which relates to the field of motor supports and comprises a locking ring, a weighting rod, a weighting block mounting position and a weighting block. The locking ring is used for being fixedly connected to the periphery of a rotating shaft to be balanced. The multiple sets of weighing rods are fixedly connected to the periphery of the locking ring, and every two weighing rods in each set are symmetrically arranged. And a plurality of weighting block mounting positions for mounting weighting blocks are arranged on the weighting rod. The utility model has the advantages that: weighting is carried out on different weighting block mounting positions, weighting synthesis at any angle in a plane can be realized, and on-site dynamic balance can be conveniently carried out by adjusting the mass and the mounting position of the weighting block; a professional vibration measuring instrument is not needed, and a fine dynamic balance test can be realized only by holding a vibration measuring meter with a hand to measure vibration amplitude changes before and after weight increase.

Description

Technical Field

[0001] This utility model relates to the field of motor brackets, and in particular to a dynamic balancing weight-bearing bracket. Background Technology

[0002] Currently, in industrial production, large motors are frequently retrofitted with frequency converters for energy conservation. Vertical motors, however, have relatively weak horizontal support rigidity, long shafts, and their critical speed is generally lower than their industrial operating speed. This results in the equipment operating speed often falling within the critical speed range after frequency conversion retrofitting of vertical motors, leading to excessive vibration in the upper part of the motor.

[0003] Currently, there are two commonly used methods for handling critical vibrations:

[0004] The first method is to reduce the imbalance of the shaft system by dynamic balancing, thereby reducing the unbalanced vibration force and the unbalanced vibration response at the critical speed. For example, the rotor dynamic balancing adjustment method disclosed in patent document CN118310680A can quickly adjust the dynamic balance of the rotor. This method can reduce the vibration amplitude at the critical speed to a certain extent, but it requires very high balancing accuracy to control the shaft vibration amplitude at the critical speed to reach the qualified range. Multiple adjustments are required to achieve good results.

[0005] The second method is to suppress vibration response at critical speeds by strengthening the fixed support on the upper part of the motor. On-site, a set screw rigid support is generally used. However, this method is difficult to control to ensure that the support strength at each point is consistent. If the control is not good, it is easy to cause the shaft centerline to be inconsistent. Not only will it fail to achieve the vibration reduction effect, but it will also aggravate the vibration. At the same time, when the vibration is too large, the rigid support may also cause damage to the equipment. Utility Model Content

[0006] The technical problem to be solved by this utility model is how to conveniently perform on-site dynamic balancing support for motors.

[0007] This utility model solves the above-mentioned technical problems through the following technical means: a dynamic balancing weight support, including a locking ring, weight rods, weight block mounting positions, and weight blocks; the locking ring is used to fix and connect to the outer circumference of the rotating shaft to be balanced; multiple sets of weight rods are fixedly connected to the outer circumference of the locking ring, with two weight rods symmetrically arranged in each set; the weight rods are provided with multiple weight block mounting positions for mounting weight blocks.

[0008] As an optimized technical solution, the mounting position of the weight block adopts a bolt hole, the weight block adopts a bolt, and the weight block is threadedly connected to the mounting position of the weight block.

[0009] As an optimized technical solution, the weighting rods are provided in four positions, which are arranged orthogonally to form four quadrants.

[0010] As an optimized technical solution, the length direction of the weighting rod is along the radial direction of the locking ring.

[0011] As an optimized technical solution, the mounting positions of the weight blocks are evenly distributed along the length direction of the weight rod.

[0012] The advantages of this invention are: by adding weight at different weighting positions, weighting synthesis at any angle in the plane can be achieved; on-site dynamic balancing can be easily performed by adjusting the mass and installation position of the weights; no professional vibration measuring instruments are required, and a precise dynamic balancing test can be achieved simply by measuring the change in vibration amplitude before and after weighting with a handheld vibration meter. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the dynamic balancing weight-bearing bracket according to an embodiment of the present invention. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] like Figure 1 As shown in the figure, this utility model embodiment discloses a dynamic balancing weight support, including a locking ring 1, a weight rod 2, a weight block mounting position 3, and a weight block 4.

[0016] The locking ring 1 is used to fix the outer circumference of the rotating shaft to be balanced; multiple sets of weight rods 2 are fixedly connected to the outer circumference of the locking ring 1, with two weight rods 2 symmetrically arranged in each set; in this embodiment, there are four weight rods 2, which are orthogonally arranged to form four quadrants; the length direction of the weight rods 2 is along the radial direction of the locking ring 1, and multiple weight block mounting positions 3 for mounting weight blocks 4 are evenly distributed along the length direction on the weight rods 2, and the weight blocks 4 have various mass specifications; in this embodiment, the weight block mounting positions 3 are bolt holes, the weight blocks 4 are bolts, and the weight blocks 4 are threadedly connected to the weight block mounting positions 3.

[0017] The dynamic balancing test using the aforementioned dynamic balancing weighted support includes the following steps:

[0018] S1. Install a weight block 4 at any weight block mounting position 3 on one of the two weight bars 2 in each group and perform a trial weighting. If the vibration decreases after the trial weighting, retain the weight block 4. If the vibration increases after the trial weighting, adjust the weight block 4 to any weight block mounting position 3 on the other weight bar 2 in the same group.

[0019] S2. After trial weighting, the weighting rod 2 corresponding to the imbalance is obtained;

[0020] S3. Adjust the mass and installation position of the weight block 4 on the weight rod 2 corresponding to the imbalance, thereby adjusting the combined weight and reducing the rotor vibration amplitude. The mass of the weight block 4 on the weight rod 2 can be adjusted by increasing or decreasing the number of weight blocks 4 and by using weight blocks 4 with different mass specifications.

[0021] Working principle: By adding weight at different weighting block installation positions 3, weighting synthesis at any angle in the plane can be achieved. On-site dynamic balancing can be easily performed by adjusting the mass and installation position of the weighting block 4. No professional vibration measuring instruments are required. A precise dynamic balancing test can be achieved by simply measuring the change in vibration amplitude before and after weighting with a handheld vibration meter.

[0022] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dynamic balancing weight support, characterized by: The application relates to a balance weight device for a rotating shaft, which comprises a locking ring, weight rods, weight block mounting positions and weight blocks.

2. The dynamic balancing weight support of claim 1, wherein: The weight block mounting positions are bolt holes, the weight blocks are bolts, and the weight blocks are in threaded connection with the weight block mounting positions.

3. The dynamic balancing weight support of claim 1, wherein: The weight rods are arranged in four quadrants.

4. The dynamic balancing weight support of claim 1, wherein: The length direction of the weight rods is along the radial direction of the locking ring.

5. The dynamic balancing weight support of claim 1, wherein: The weight block mounting positions are uniformly distributed along the length direction of the weight rods.

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