Dynamic balance weighting support and dynamic balance test method

Abstract

The invention discloses a dynamic balance weighting support and a dynamic balance test method, and relates to the field of motor supports, the dynamic balance weighting support 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. A plurality of weighting block mounting positions for mounting weighting blocks are arranged on the weighting rod, and the weighting blocks have various mass specifications. The device has the advantages that weighting is carried out on different weighting block installation positions, weighting synthesis at any angle in a plane can be achieved, and field dynamic balance can be conveniently carried out by adjusting the mass and the installation positions of the weighting blocks; 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] The present invention relates to the field of motor brackets, and in particular to a dynamic balance weight addition bracket and a dynamic balance test method. Background Art

[0002] Currently, during industrial production, for energy conservation considerations, frequency conversion transformation is often carried out on some large motors. For vertical motors, their horizontal support stiffness is weak, the shafting is long, and the critical speed is generally lower than their power frequency operating speed. This results in that after the frequency conversion transformation of the vertical motor, the operating speed of the equipment often falls within its critical speed range, and the vibration of the upper part of the motor exceeds the standard.

[0003] Currently, there are two commonly used methods for dealing with critical vibration:

[0004] The first is to reduce the unbalance amount of the shafting through dynamic balance, reduce the unbalance exciting force of the shafting, and thereby reduce the unbalance vibration response at the critical speed. For example, a rotor dynamic balance adjustment method disclosed in the patent document with publication number CN118310680A realizes rapid adjustment of 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 balance accuracy to control the vibration amplitude of the shafting at the critical speed within the qualified range, and multiple adjustments are required to achieve good results.

[0005] The second is to suppress the vibration response at the critical speed by strengthening the fixed support strength of the upper part of the motor. Generally, the method of hard support with set screws is adopted on site, but it is difficult to control the support strength of each point to be consistent. In case of poor control, it is easy to cause the shafting center line to be inconsistent, which not only fails to achieve the vibration reduction effect, but instead exacerbates the vibration; at the same time, when the vibration is too large, the rigid support may also cause damage to the equipment. Summary of the Invention

[0006] The technical problem to be solved by the present invention is how to conveniently perform on-site dynamic balance support for the motor.

[0007] The present invention solves the above technical problem by the following technical means: A dynamic balance weight addition bracket includes a locking ring, a weight rod, a weight block mounting position, and a weight block; the locking ring is used for fixedly connecting to the outer periphery of the rotating shaft to be balanced; multiple groups of weight rods are fixedly connected to the outer periphery of the locking ring, and two weight rods in each group are symmetrically arranged; the weight rod is provided with a plurality of weight block mounting positions for mounting weight blocks, and the weight blocks have various mass specifications.

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

[0009] As an optimized technical solution, there are four weight rods, and the four weight rods are arranged orthogonally to form four quadrants.

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

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

[0012] A dynamic balance test method using the dynamic balance weight support includes the following steps:

[0013] S1. Install a weight block at any weight block mounting position on one of each group of two weight rods for trial weighting. If the vibration decreases after the trial weighting, the weight block is retained; if the vibration increases after the trial weighting, the weight block is adjusted to any weight block mounting position on the other weight rod of this group.

[0014] S2. After the trial weighting, obtain the weight rod corresponding to the unbalance.

[0015] S3. Adjust the mass and installation position of the weight block on the weight rod corresponding to the unbalance, so as to adjust the combined weight and achieve a reduction in the vibration amplitude of the rotor.

[0016] The advantages of the present invention are as follows: By adding weights at different weight block mounting positions, the weight combination at any angle in the plane can be achieved, and on-site dynamic balance can be conveniently performed by adjusting the mass and installation position of the weight block; no professional vibration measuring instrument is required, and only a handheld vibration meter needs to be used to measure the change in vibration amplitude before and after weighting to achieve a fine dynamic balance test. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the dynamic balance weight support according to the embodiment of the present invention. Detailed Embodiments

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] As Figure 1 shown, the embodiment of the present invention discloses a dynamic balance weight support, which includes a locking ring 1, weight rods 2, weight block mounting positions 3, and weight blocks 4.

[0020] The locking ring 1 is used for fixedly connecting to the outer periphery of the rotating shaft to be balanced; a plurality of groups of weight rods 2 are fixedly connected to the outer periphery of the locking ring 1, and two weight rods 2 in each group are symmetrically arranged; in this embodiment, there are four weight rods 2, and the four weight rods 2 are orthogonally arranged to form four quadrants; the length direction of the weight rod 2 is along the radial direction of the locking ring 1, and a plurality of weight block mounting positions 3 for mounting the weight blocks 4 are evenly distributed along the length direction of the weight rod 2. The weight blocks 4 have various mass specifications; in this embodiment, the weight block mounting position 3 is a bolt hole, the weight block 4 is a bolt, and the weight block 4 is threadedly connected to the weight block mounting position 3.

[0021] The embodiment of the present invention also discloses a dynamic balance test method, which uses the dynamic balance weight support and includes the following steps:

[0022] S1. Install the weight block 4 at any weight block mounting position 3 of one of the two weight rods 2 in each group for trial weighting. If the vibration decreases after the trial weighting, the weight block 4 is retained. If the vibration increases after the trial weighting, the weight block 4 is adjusted to any weight block mounting position 3 on the other weight rod 2 of this group;

[0023] S2. After the trial weighting, obtain the weight rod 2 corresponding to the unbalance;

[0024] S3. Adjust the mass and installation position of the weight block 4 on the weight rod 2 corresponding to the unbalance, so as to adjust the combined weight and achieve the reduction of 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 using weight blocks 4 with different mass specifications.

[0025] Working principle: By adding weights at different weight block mounting positions 3, the weight synthesis at any angle in the plane can be realized, and the on-site dynamic balance can be conveniently carried out by adjusting the mass and installation position of the weight block 4; no professional vibration measuring instrument is required, and only by holding a vibration measuring meter to measure the change in the vibration amplitude before and after weighting, a fine dynamic balance test can be achieved.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dynamic balancing weighted bracket, characterized in that: It includes a locking ring, a weight rod, a weight block mounting position and a weight block; the locking ring is used to be fixedly connected to the outer periphery of the rotating shaft to be balanced; multiple groups of weight rods are fixedly connected to the outer periphery of the locking ring, and two weight rods in each group are symmetrically arranged; the weight rods are provided with multiple weight block mounting positions for installing weight blocks, and the weight blocks have various quality specifications.

2. The dynamic balancing weighted bracket according to claim 1, characterized in that: The weight block installation position adopts a bolt hole, the weight block adopts a bolt, and the weight block is threadedly connected to the weight block installation position.

3. The dynamic balancing weighted bracket according to claim 1, characterized in that: There are four weighting rods, which are arranged orthogonally to form four quadrants.

4. The dynamic balancing weighted bracket according to claim 1, characterized in that: The length direction of the weight rod is along the radial direction of the locking ring.

5. The dynamic balancing weighted bracket according to claim 1, characterized in that: The weight block installation positions are evenly distributed along the length direction of the weight rod.

6. A dynamic balancing test method, using the dynamic balancing weighted bracket according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Install a weight block at any weight block installation position of one of the two weight rods in each group to test weight. If the vibration is reduced after the test weight, keep the weight block. If the vibration is increased after the test weight, adjust the weight block to any weight block installation position on the other weight rod of the group. S2. After trial weighting, the weighting rod corresponding to the imbalance is obtained; S3. Adjust the mass and installation position of the weight block on the weight rod corresponding to the imbalance, thereby adjusting the synthetic weight to reduce the vibration amplitude of the rotor.

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