CN208128012U - A kind of rotor structure reducing rotor unbalance value - Google Patents

Abstract

The utility model discloses a rotor structure for reducing the unbalanced amount of the rotor, which comprises a rotor assembly, the rotor assembly includes a rotor core and a rotating shaft assembled together; the outer circle area of the rotor core is provided with several magnetic steel slots , the inner circle area of the rotor core is provided with a first keyway; the outer circle area of the rotating shaft is correspondingly provided with a second keyway; in the assembled state, the rotating shaft is inserted into the rotor core, and simultaneously inserted through a flat key It is arranged in the first keyway of each rotor punching section and the second keyway of the rotating shaft to realize the fixed connection between the rotor and the rotating shaft; the assembled rotor assembly has a center of gravity, which extends in the axial direction to form a center of gravity line, so A weight-removing groove is provided on the inner circle area of the rotor, the groove length direction of the weight-removing groove extends in the axial direction, and the groove depth direction of the weight-removing groove extends along the radial direction perpendicular to the center of gravity line, And the center line of symmetry of any cross-section of the weight-removing tank perpendicularly intersects with the center line of gravity.

Description

A rotor structure for reducing rotor unbalance

technical field

The utility model belongs to the field of motors, in particular to a motor structure, in particular to a rotor structure for reducing the unbalanced amount of the rotor.

Background technique

At present, in the industry of industrial motors and even new energy vehicle drive motors, the vibration requirements of the motors are getting higher and higher, and the corresponding requirements for the unbalance of the motor rotors are also getting higher and higher. In motors for driving automobiles, the level of rotor dynamic balance has been raised to no less than G1 level. Therefore, reducing the initial unbalance of the rotor and reducing or even eliminating the subsequent balancing process has become an urgent need.

In the prior art, in order to realize the connection between the rotor and the rotating shaft, it is usually necessary to provide a keyway on the rotor, and the opening of the keyway will inevitably affect the balance of the rotor. Rebalance to adjust the unbalance of the rotor. The disadvantage of using weighted balance is that the unbalance is adjusted by artificially adding counterweights such as balance cement or aluminum blocks, which has low efficiency and the counterweights are easy to fall into the air gap between the rotor and the stator, resulting in abnormal noise , and even lead to the risk of motor jamming. However, the disadvantage of adopting deweighting balance is: due to the large initial unbalance of the rotor, more materials need to be removed, resulting in a decrease in processing efficiency and an increase in processing cost.

In view of this, proposing a rotor structure that reduces the rotor unbalance is the subject of this utility model.

Contents of the invention

The utility model provides a rotor structure that reduces the unbalanced amount of the rotor. The purpose of the utility model is to solve the problems of low efficiency and easy drop of counterweights into the air gap between the stator and the rotor in the prior art when using weighted balance. Heavy balance has the problems of reduced processing efficiency and increased processing cost.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a rotor structure for reducing rotor unbalance, including a rotor assembly, the rotor assembly includes a rotor core and a rotating shaft assembled together; the rotor core The outer circle area of the rotor core is provided with a plurality of magnetic steel grooves, the magnetic steel grooves are equipped with magnetic steel, the inner circle area of the rotor core is provided with a first keyway; the outer circle area of the rotating shaft is correspondingly provided with a second keyway; In the assembled state, the rotating shaft is inserted into the rotor core, and is simultaneously inserted into the first keyway of each rotor section and the second keyway of the rotating shaft through a flat key, so as to realize the fixing of the rotor core and the rotating shaft connect;

The assembled rotor assembly has a center of gravity, which extends axially to form a center of gravity line, and a weight-removing groove is provided on the inner circle of the rotor core, and the groove length of the weight-removing groove extends axially , the groove depth direction of the weight-removing groove extends along the radial direction perpendicular to the center of gravity line, and the centerline of symmetry of any cross-section of the weight-removing groove perpendicularly intersects with the center of gravity line.

The relevant content in the above-mentioned technical scheme is explained as follows:

1. In the above solution, the rotor core includes several rotor punching sections, and each rotor punching section is formed by stacking several rotor punching pieces and riveting them with rivets.

2. In the above scheme, several groups of rivet holes and rivet hidden head holes evenly spaced along the circumferential direction are provided on the rotor punch, and each group of rivet holes and rivet hidden head holes is one in front of the other along the radial direction of the rotor punch. Arranged last, and in each adjacent two groups of rivet holes and rivet hidden head holes, the rivet holes and rivet hidden head holes are distributed in a staggered manner.

3. In the above solution, the rotor assembly also includes a first rotor pressure plate, a second rotor pressure plate and a rotor pressure sleeve, the rotor pressure sleeve is pressed on the rotor core, and is formed by the first rotor pressure plate, the second rotor pressure plate Fixed on both ends of the rotor core.

Working principle: The utility model sets a weight-removing slot on the rotor core to adjust the unbalance of the rotor, so that the center of gravity of the rotor in the axial direction falls on the center of the rotor, thereby realizing dynamic balance.

Due to the application of the above-mentioned technical solutions, the utility model has the following advantages compared with the prior art:

The utility model has a simple and reliable structure, reduces the initial unbalance of the rotor, can save the rebalancing process, and saves labor cost and time.

Description of drawings

Accompanying drawing 1 is the schematic diagram of rotor punching in the present embodiment;

Accompanying drawing 2 is the schematic cross-sectional view of the assembled rotor core and shaft in this embodiment;

Accompanying drawing 3 is the three-dimensional view one of rotor structure in the present embodiment;

Accompanying drawing 4 is the perspective view II of the rotor structure in this embodiment;

Accompanying drawing 5 is the three-dimensional view of a rotor core in this embodiment;

Accompanying drawing 6 is a schematic diagram of the position of the center of the circle, the projection point of the center of gravity and the deduplication groove in this embodiment.

In the above drawings: 1. Rotor core; 10. Rotor punching sheet; 11. Center of gravity projection point; 12. Balance point; 101. First keyway; 102. Deduplication groove; 103. Rivet hole; 104. Rivet hidden head Hole; 2. Rotor punching section; 3. Rivet; 4. Flat key; 5. Magnetic steel; 6. Rotating shaft; 7. First rotor pressure plate; 8. Second rotor pressure plate;

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment: A rotor structure for reducing rotor unbalance

Referring to accompanying drawings 1-5 , it includes a rotor assembly, which includes a rotor core 1 , a rotating shaft 6 , a first rotor pressing plate 7 , a second rotor pressing plate 8 and a rotor pressing sleeve 9 assembled together.

The rotor core 1 includes a rotor core. The rotor core includes several rotor punch sections 2. Each rotor punch section 2 is formed by laminating several rotor punch pieces 10 and then riveted by rivets 3. The outer circle area is provided with several magnetic steel grooves, and magnetic steel 5 is housed in the magnetic steel grooves. The inner circle area of the rotor core is provided with a first keyway 101 ; the outer circle area of the rotating shaft 6 is correspondingly provided with a second keyway. In this embodiment, the rotor punch 10 is provided with several groups of rivet holes 103 and rivet hidden head holes 104 evenly spaced along the circumferential direction, and each group of rivet holes 103 and rivet hidden head holes 104 is arranged along the The rivet holes 103 and the rivet hidden head holes 104 are distributed in a staggered manner in each adjacent two groups of rivet holes 103 and rivet hidden head holes 104, and the rivets 3 are passed through the rivet holes 103 and passed through The rotor punching section 2 is stacked upside down to hide the protruding rivet head in the rivet hole 104 , so that the neatly stacked rotor punching pieces 10 are riveted together to form the rotor punching section 2 .

In the assembled state, the rotating shaft 6 is inserted into the rotor core 1 composed of several rotor punching segments 2, and is simultaneously inserted in the first key groove 101 of each rotor punching segment 2 and the opening of the rotating shaft 6 through a flat key 4. The second keyway is used to realize the fixed connection between the rotor core 1 and the rotating shaft 6 . The rotor pressing sleeve 9 is pressed on the rotor core 1 and fixed at both ends of the rotor core 1 by the first rotor pressing plate 7 and the second rotor pressing plate 8 .

The assembled rotor assembly has a center of gravity, and the center of gravity extends along the axial direction to form a center of gravity line. A weight-removing groove 102 is provided on the inner circle area of the rotor core, and the groove length direction of the weight-removing groove 102 is along the axial direction. The groove depth direction of the weight-removing groove 102 extends along the radial direction perpendicular to the center of gravity line, and the centerline of symmetry of any cross-section of the weight-removing groove 102 perpendicularly intersects the center of gravity line.

Referring to Figure 6, it is a schematic diagram of the positions of the center of the circle, the projection point 11 of the center of gravity, and the weight removal groove 102 in this embodiment. In order to further clearly describe the positional relationship between the center of gravity and the weight removal groove 102, it is assumed that the thickness of the rotor punching plate 10 is ignored , the center of gravity of the rotor assembly is projected axially on each rotor punch 10 to form a center of gravity projection point 11, and the radial line of each rotor punch 10 passing through the center of gravity projection point 11 intersects the inner circle of the corresponding rotor punch 10 at A balance point 12. At this time, since the inner circle area of the rotor core 1 is provided with a deduplication groove 102, each rotor punch 10 has a notch, the center point of which coincides with the balance point 12, and the notch itself is along the The width direction is linearly symmetrical with respect to the radial line passing through the projection point 11 of the center of gravity. In each rotor punching section 2, the shapes and sizes of the notches on all rotor punching sections 10 are the same, and the line connecting the centers of all the notches along any cross-section is on a straight line in the axial direction. When all the rotor punching sections 2 After the rotor punching pieces 10 are laminated, the weight-removing grooves 102 are formed at the notches of all the rotor punching pieces 10 .

In the utility model, a weight-removing groove 102 for adjusting the unbalance amount of the rotor is provided on the rotor iron core 1, that is, a gap is provided on the rotor punching plate 1, so that the center of gravity of the rotor in the axial direction falls on the center of the rotor, thereby realizing dynamic balance.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (4)

1. A rotor structure for reducing rotor unbalance, including a rotor assembly, which includes a rotor core (1) and a rotating shaft (6) assembled together; the outer circle of the rotor core (1) There are several magnetic steel slots in the area, and the magnetic steel (5) is installed in the magnetic steel slots. The inner circle area of the rotor core (1) is provided with a first keyway (101); the outer shaft (6) The circular area is correspondingly provided with a second keyway; in the assembled state, the rotating shaft (6) is inserted into the rotor core (1), and is simultaneously inserted into each rotor punch (2) through a flat key (4). in the first keyway (101) of the rotating shaft (6) and the second keyway of the rotating shaft (6), so as to realize the fixed connection between the rotor core (1) and the rotating shaft (6); It is characterized in that: the assembled rotor assembly has a center of gravity, and the center of gravity extends axially to form a center of gravity line, and a weight-removing groove (102) is provided on the inner circle area of the rotor core (1), and the weight-removing groove (102) The groove length direction of the heavy groove (102) extends along the axial direction, the groove depth direction of the weight-removing groove (102) extends along the radial direction perpendicular to the center of gravity line, and the weight-removing groove (102) is arbitrary A centerline of symmetry of a cross section perpendicularly intersects said centerline of gravity. 2. The rotor structure for reducing rotor unbalance according to claim 1, characterized in that: the rotor core (1) includes several rotor sections (2), and each rotor section (2) is composed of several rotor sections The sheets (10) are laminated and riveted by rivets (3). 3. The rotor structure for reducing rotor unbalance according to claim 2, characterized in that: on the rotor punch (10), there are several groups of rivet holes (103) and rivet holes distributed at even intervals along the circumferential direction. The head holes (104), each group of rivet holes (103) and rivet hidden head holes (104) are arranged one after the other along the radial direction of the rotor punch (10), and each adjacent two groups of rivet holes (103) and rivets In the hidden head holes (104), the rivet holes (103) and the rivet hidden head holes (104) are distributed alternately. 4. The rotor structure for reducing rotor unbalance according to claim 1, characterized in that: the rotor assembly further includes a first rotor pressing plate (7), a second rotor pressing plate (8) and a rotor pressing sleeve (9) , the rotor pressing sleeve (9) is pressed on the rotor iron core (1), and is fixed at both ends of the rotor iron core (1) by the first rotor pressing plate (7) and the second rotor pressing plate (8).