CN114039469A - Motor rotor dynamic balance adjusting device and adjusting method - Google Patents
Motor rotor dynamic balance adjusting device and adjusting method Download PDFInfo
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- CN114039469A CN114039469A CN202111333565.8A CN202111333565A CN114039469A CN 114039469 A CN114039469 A CN 114039469A CN 202111333565 A CN202111333565 A CN 202111333565A CN 114039469 A CN114039469 A CN 114039469A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
- H02K15/165—Balancing the rotor
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- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention provides a dynamic balance adjusting device and an adjusting method of a motor rotor, wherein crossed balance blocks are arranged at two positions which are symmetrical relative to a shaft on a rotor balance disc, the crossed balance blocks are fixed on the rotor balance disc through compression bolts, and the crossed balance blocks can freely slide on the rotor balance disc; the dynamic balance of the motor rotor is adjusted by adjusting the relative positions of two balance blocks of the crossed balance block which can freely slide on the rotor balance disc. The invention is based on the dynamic balance vector decomposition principle, can realize the G1 standard and requirement of dynamic balance grade by adjusting the relative position of the freely sliding crossed balance block on the rotor balance disc, has convenient and simple operation process and larger range of the initial unbalance amount which can be compensated.
Description
Technical Field
The invention relates to the field of motors, in particular to a dynamic balance adjusting device and method for a motor rotor.
Background
The rotor dynamic balance is an indispensable important process in the manufacturing process of the motor rotor, and along with the increasing requirements of the current motor technology on high rotating speed, high precision and low vibration noise, the improvement of the rotor dynamic balance technology becomes a key part in the motor manufacturing technology. Two dynamic balance modes are commonly used at present, one is a weight gain mode: adding balance mud or balance glue on the rotor; one is a deduplication mode: the rotor balance disc is drilled or milled to remove weight. The weight increasing mode is generally used for occasions with low requirements on dynamic balance grade, such as G2.5 standard, because the weight of the added materials is difficult to control. The operation process is complicated by the weight removing mode, the workpiece needs to be machined for many times, the consumed working hours are long, and the generated machining fine scraps are difficult to treat.
Disclosure of Invention
The invention provides a dynamic balance adjusting device and method for a motor rotor, aiming at the technical problems in the prior art.
According to a first aspect of the present invention, there is provided a dynamic balance adjustment device for a motor rotor, the motor rotor includes a rotating shaft, a rotor core, a rotor balance disk, a cross balance block and a pressing bolt, the rotor core is fixedly mounted on the rotating shaft and rotates with the rotation of the rotating shaft, the rotor balance disk is mounted on the rotating shaft and is fixed with the rotor core, two cross balance blocks are mounted on the rotor balance disk symmetrically with respect to the rotating shaft, the cross balance blocks are fixed on the rotor balance disk through the pressing bolt, and the cross balance blocks can slide freely on the rotor balance disk;
the dynamic balance of the motor rotor is adjusted by adjusting the relative positions of two balance blocks of the crossed balance block which can freely slide on the rotor balance disc.
On the basis of the technical scheme, the invention can be improved as follows.
Optionally, a plurality of holes are uniformly spaced on a plurality of concentric circumferences of the rotor balance disc by taking the rotating shaft as a center, so as to form a plurality of circles of holes.
Optionally, the crossed balance blocks include a circumferential balance block and a radial balance block, and waist-shaped holes are formed in both the circumferential balance block and the radial balance block;
the circumferential balance block and the rotor balance block are fixed through pressing bolts penetrating through waist-shaped holes of the circumferential balance block and holes in the rotor balance block, a plurality of pressing bolts penetrate through waist-shaped holes of the radial balance block and penetrate through a plurality of holes in the radial direction of the rotor balance block to be fixed with the rotor balance block, one of the pressing bolts penetrates through the waist-shaped holes of the circumferential balance block, and the circumferential balance block and the radial balance block form a crossed balance block.
According to a second aspect of the present invention, there is provided a method for adjusting dynamic balance of a rotor of an electric machine, comprising:
the dynamic balance of the motor rotor is adjusted by adjusting the relative positions of two balance blocks of the crossed balance block which can freely slide on the rotor balance disc.
Optionally, the adjusting the dynamic balance of the motor rotor by adjusting the relative positions of two balance blocks of the cross balance block capable of freely sliding on the rotor balance disc includes:
placing the motor rotor on a dynamic balancing machine, and measuring the initial unbalance amount of the motor rotor on two symmetrical surfaces relative to a rotating shaft;
decomposing the initial unbalance on two surfaces of the motor rotor to two similar angles according to a vector decomposition principle to obtain a weight value at each angle;
adjusting the two symmetrical crossed balance blocks according to the weight value at each angle, and adjusting the angle and the weight value;
and after adjustment, continuously measuring the dynamic balance and adjusting the crossed balance block until the motor rotor meets the dynamic balance grade.
Optionally, the cross balance blocks include a circumferential balance block and a radial balance block, and the initial unbalance amounts on two surfaces of the motor rotor are decomposed into two similar angles according to a vector decomposition principle to obtain a weight value at each angle, including:
the initial position direction of the radial balance block is taken as the 0-degree direction, and two angle directions on the rotor balance disc, which are closest to the 0-degree direction, are two close angles;
and decomposing the initial unbalance amount into two similar angles to obtain a weight value at each angle.
Optionally, the adjusting of the angles and the weight values by adjusting the symmetric two crossed balance blocks according to the weight value at each angle includes:
according to the weight value of each angle, the adjustment of the angle is realized by moving the circumferential balance blocks, and the adjustment of the weight value is realized by moving the radial balance blocks.
Optionally, the adjusting of the angle by moving the circumferential balance weight and the adjusting of the weight by moving the radial balance weight according to the weight value at each angle includes:
and respectively moving the circumferential balance blocks and the radial balance blocks by adjusting the matching relation of the compression bolts and different holes on the rotor balance disc.
The invention provides a dynamic balance adjusting device and method for a motor rotor, which are based on a dynamic balance vector decomposition principle, can realize the standard and requirement of a dynamic balance grade G1 by adjusting the relative positions of two balance slide blocks which can freely slide on a rotor balance disc, are convenient and simple in operation process, and have larger range of initial unbalance amount which can be compensated.
Drawings
Fig. 1 is a schematic structural diagram of a dynamic balance adjustment device for a motor rotor according to the present invention;
FIG. 2 is a schematic structural diagram of a rotor balancing disk;
FIG. 3 is a schematic view of a circumferential weight;
FIG. 4 is a schematic view of a radial counterweight.
In the drawings, the names of the components represented by the respective reference numerals are as follows:
1. the rotor comprises a rotating shaft, 2, a rotor core, 3, a rotor balance disc, 4, a circumferential balance block, 5, a radial balance block, 6 and a compression bolt.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example one
The utility model provides an electric motor rotor dynamic balance adjusting device, refers to fig. 1, and electric motor rotor includes pivot 1, rotor core 2, rotor balance disc 3, crossing balancing piece and clamp bolt 6, rotor core 2 fixed mounting follows the rotation of pivot 1 and rotates in pivot 1, rotor balance disc 3 install in pivot 1 and with rotor core 2 is fixed rotor balance disc 3 is last relative 1 symmetrical two places installation crossing balancing piece of pivot, crossing balancing piece is fixed in through clamp bolt 6 on the rotor balance disc 3, crossing balancing piece can freely slide on the rotor balance disc 3.
Referring to fig. 2, a plurality of holes are uniformly spaced on a plurality of concentric circumferences of the rotor balance disc 3 by taking the rotating shaft 1 as a center, so as to form a plurality of circles of holes. The number of the holes formed in each circle is equal.
The crossed balance block comprises a circumferential balance block 4 and a radial balance block 5, as shown in fig. 3 and fig. 4, the circumferential balance block 4 is arc-shaped, the radial balance block 5 is long-strip-shaped, and waist-shaped holes are formed in the circumferential balance block 4 and the radial balance block 5. The circumferential balance block 4 and the rotor balance disk 3 are fixed by a plurality of compression bolts 6 penetrating through waist-shaped holes of the circumferential balance block 4 and holes on the rotor balance disk 3, the radial balance block 5 and a plurality of holes in the radial direction of the rotor balance disk 3 are fixed with the rotor balance disk 3 by a plurality of compression bolts 6, one of the compression bolts 6 penetrates through the waist-shaped hole of the circumferential balance block 4, and the circumferential balance block 4 and the radial balance block 5 form a crossed balance block.
When the motor rotor is unbalanced, the dynamic balance of the motor rotor is adjusted by adjusting the relative position between the circumferential balance block 4 and the radial balance block 5 of the crossed balance block which can freely slide on the rotor balance disc 3.
Example two
A method for adjusting dynamic balance of a motor rotor, the method being based on a method for adjusting dynamic balance of a motor rotor of a device for adjusting dynamic balance of a motor rotor according to an embodiment, the method comprising: the dynamic balance of the motor rotor is adjusted by adjusting the relative positions of two balance blocks of the crossed balance block which can freely slide on the rotor balance disc.
As an embodiment, the dynamic balance of the motor rotor is adjusted by adjusting the relative position of two balance weights of a cross balance weight which can freely slide on a rotor balance disc, and the method comprises the following steps: placing the motor rotor on a dynamic balancing machine, and measuring the initial unbalance amount of the motor rotor on two symmetrical surfaces relative to a rotating shaft; decomposing the initial unbalance on two surfaces of the motor rotor to two similar angles according to a vector decomposition principle to obtain a weight value at each angle; adjusting the two symmetrical crossed balance blocks according to the weight value at each angle, and adjusting the angle and the weight value; and after adjustment, continuously measuring the dynamic balance and adjusting the crossed balance block until the motor rotor meets the dynamic balance grade.
Wherein, the crossing balancing piece includes circumference balancing piece and radial balancing piece, according to the vector decomposition principle, decompose two angles close with the initial unbalance amount on the electric motor rotor two sides on, obtain the weight numerical value on every angle, include: the initial position direction of the radial balance block is taken as the 0-degree direction, and two angle directions on the rotor balance disc, which are closest to the 0-degree direction, are two close angles; and decomposing the initial unbalance amount into two similar angles to obtain a weight value at each angle.
It can be understood that, taking fig. 1 as an example, the direction of the radial balance weight at the current position is a 0 ° direction, for example, 12 holes are formed in one circle of the rotor balance disc, and then each hole corresponds to 30 ° on the circumference, so when the motor rotor is unbalanced, the initial unbalance amount is decomposed into two similar angles of 30 ° and 60 °, that is, two hole positions similar to the current hole position of the radial balance weight, and the weight value at each angle is decomposed and calculated.
It should be noted that, in the embodiment of the present invention, the initial unbalance amount is decomposed into two angles, and in actual implementation, the initial unbalance amount may also be decomposed into more angles.
As an embodiment, according to the weight value at each angle, adjusting the symmetrical two crossed balance blocks, and performing the adjustment of the angle and the weight value, the method comprises the following steps: according to the weight value of each angle, the angle is adjusted by moving the circumferential balance blocks, and the weight value is adjusted by moving the radial balance blocks.
Wherein, according to the weight value in every angle, through removing the adjustment that the angle was realized to circumference balancing piece to and through removing radial balancing piece realizes the adjustment of weight value, include: and respectively moving the circumferential balance block and the radial balance block by adjusting the matching relation between the compression bolt and different holes on the rotor balance disc, and adjusting the positions of the circumferential balance block and the radial balance block.
To summarize, the implementation of the electronic rotor dynamic balance adjustment method based on the proper decomposition is as follows:
1. and symmetrically installing the crossed balance blocks on the left side and the right side of the motor rotor on a rotor balance disc.
2. The initial unbalance on both sides of the rotor was measured by placing the rotor on a dynamic balancing machine.
3. According to the vector decomposition principle, the initial unbalance of the left surface and the right surface is decomposed to two similar angles.
4. And adjusting the crossed balance blocks on the left surface and the right surface according to the angle and the weight value which are calculated by decomposition, wherein the angle is adjusted by moving the balance blocks in the circumferential direction, and the weight value is adjusted by moving the balance blocks in the radial direction.
5. After the adjustment is finished, measuring the dynamic balance again, and if the dynamic balance grade cannot be met, finely adjusting the balance weight again until the dynamic balance grade is met; if the condition can be satisfied, the dynamic balance process is directly finished.
According to the dynamic balance adjusting device for the motor rotor, provided by the invention, the circumferential balance blocks in the crossed balance blocks can slide at any angle in the circumferential direction of the rotor balance disc, so that the compensation at any angle is realized; the crossed balance blocks are positioned by adopting a waist-shaped hole design, so that the compensation of the decomposed unbalance amount can be conveniently and quickly realized; through the design of the size of the balance block and the distance between the screws on the balance disc, at least two screws can be guaranteed to be pressed tightly when the balance block is fixed. The corresponding dynamic balance adjusting method realizes the angle positioning after the vector decomposition by the adjustment of the balance blocks in the circumferential direction, realizes the weight compensation after the vector decomposition by the adjustment of the balance blocks in the radial direction, is relatively independent and does not influence each other, can determine the angle before operation, and then carries out the weight compensation adjustment, and has high compensation precision.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A dynamic balance adjusting device of a motor rotor is characterized in that the motor rotor comprises a rotating shaft, a rotor core, a rotor balance disc, a crossed balance block and a compression bolt, wherein the rotor core is fixedly arranged on the rotating shaft and rotates along with the rotation of the rotating shaft;
the dynamic balance of the motor rotor is adjusted by adjusting the relative positions of two balance blocks of the crossed balance block which can freely slide on the rotor balance disc.
2. The dynamic balance adjustment device for the rotor of the motor according to claim 1, wherein a plurality of holes are uniformly spaced on a plurality of concentric circumferences of the rotor balancing disk, which are centered on the rotating shaft, to form a plurality of circles of holes.
3. The motor rotor dynamic leveling adjusting device according to claim 2, wherein the cross balance block comprises a circumferential balance block and a radial balance block, and waist-shaped holes are formed in the circumferential balance block and the radial balance block;
the circumferential balance block and the rotor balance block are fixed through pressing bolts penetrating through waist-shaped holes of the circumferential balance block and holes in the rotor balance block, a plurality of pressing bolts penetrate through waist-shaped holes of the radial balance block and penetrate through a plurality of holes in the radial direction of the rotor balance block to be fixed with the rotor balance block, one of the pressing bolts penetrates through the waist-shaped holes of the circumferential balance block, and the circumferential balance block and the radial balance block form a crossed balance block.
4. A motor rotor dynamic balance adjustment method based on the motor rotor dynamic balance adjustment device according to claim 1, characterized by comprising:
the dynamic balance of the motor rotor is adjusted by adjusting the relative positions of two balance blocks of the crossed balance block which can freely slide on the rotor balance disc.
5. The method for adjusting the dynamic balance of the rotor of the electric machine according to claim 4, wherein the adjusting the dynamic balance of the rotor of the electric machine by adjusting the relative positions of the two balance weights of the crossed balance weights capable of freely sliding on the rotor balance disk comprises:
placing the motor rotor on a dynamic balancing machine, and measuring the initial unbalance amount of the motor rotor on two symmetrical surfaces relative to a rotating shaft;
decomposing the initial unbalance on two surfaces of the motor rotor to two similar angles according to a vector decomposition principle to obtain a weight value at each angle;
adjusting the two symmetrical crossed balance blocks according to the weight value at each angle, and adjusting the angle and the weight value;
and after adjustment, continuously measuring the dynamic balance and adjusting the crossed balance block until the motor rotor meets the dynamic balance grade.
6. The method for adjusting the dynamic balance of the rotor of the electric machine according to claim 5, wherein the cross balance blocks comprise a circumferential balance block and a radial balance block, and the decomposing the initial unbalance amounts on the two surfaces of the rotor of the electric machine into two similar angles according to the vector decomposition principle to obtain the weight value at each angle comprises:
the initial position direction of the radial balance block is taken as the 0-degree direction, and two angle directions on the rotor balance disc, which are closest to the 0-degree direction, are two close angles;
and decomposing the initial unbalance amount into two similar angles to obtain a weight value at each angle.
7. The method for adjusting the dynamic balance of the rotor of the motor according to claim 6, wherein the adjusting the angular and weight values by adjusting the symmetrical two crossed balance weights according to the weight value at each angle comprises:
according to the weight value of each angle, the adjustment of the angle is realized by moving the circumferential balance blocks, and the adjustment of the weight value is realized by moving the radial balance blocks.
8. The method for adjusting the dynamic balance of the rotor of the electric machine according to claim 7, wherein the adjusting the angle by moving the circumferential balance weight and the adjusting the weight value by moving the radial balance weight according to the weight value at each angle comprises:
and respectively moving the circumferential balance blocks and the radial balance blocks by adjusting the matching relation of the compression bolts and different holes on the rotor balance disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111333565.8A CN114039469B (en) | 2021-11-11 | 2021-11-11 | Motor rotor dynamic balance adjusting device and adjusting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111333565.8A CN114039469B (en) | 2021-11-11 | 2021-11-11 | Motor rotor dynamic balance adjusting device and adjusting method |
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| Publication Number | Publication Date |
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| CN114039469A true CN114039469A (en) | 2022-02-11 |
| CN114039469B CN114039469B (en) | 2023-03-21 |
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| CN202111333565.8A Active CN114039469B (en) | 2021-11-11 | 2021-11-11 | Motor rotor dynamic balance adjusting device and adjusting method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1881753A (en) * | 2005-06-15 | 2006-12-20 | 乐金电子(天津)电器有限公司 | Balance weight structure of compressor rotor |
| CN101282051A (en) * | 2007-04-06 | 2008-10-08 | 乐金电子(天津)电器有限公司 | Balance block structure of compressor electric machine rotor |
| CN202737652U (en) * | 2012-07-31 | 2013-02-13 | 南车株洲电机有限公司 | Balancing device of motor rotor and motor |
| CN204967516U (en) * | 2015-09-28 | 2016-01-13 | 江苏恒通发电机制造有限公司 | Electric motor rotor balancing piece |
-
2021
- 2021-11-11 CN CN202111333565.8A patent/CN114039469B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1881753A (en) * | 2005-06-15 | 2006-12-20 | 乐金电子(天津)电器有限公司 | Balance weight structure of compressor rotor |
| CN101282051A (en) * | 2007-04-06 | 2008-10-08 | 乐金电子(天津)电器有限公司 | Balance block structure of compressor electric machine rotor |
| CN202737652U (en) * | 2012-07-31 | 2013-02-13 | 南车株洲电机有限公司 | Balancing device of motor rotor and motor |
| CN204967516U (en) * | 2015-09-28 | 2016-01-13 | 江苏恒通发电机制造有限公司 | Electric motor rotor balancing piece |
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| Publication number | Publication date |
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| CN114039469B (en) | 2023-03-21 |
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