阅读说明：本技术 一种基于减材的动平衡校正方法及设备 (Dynamic balance correction method and device based on material reduction ) 是由 张国谦 李帅 金龙 于 2020-12-18 设计创作，主要内容包括：一种基于减材的动平衡校正方法,包括：在旋转体上的P-1点两次打孔,打孔方向平行于轴向,旋转体质量依次减少M-1、M-2,借助加速度传感器测量打孔前后旋转体达到相同速度时加速度的值a、a-1、a-2；基于质量值和加速度值确定打孔前后旋转体振动力,计算获得打孔前后旋转体质心P-2和质心P-3位置；在P-3所在半径上的靠近旋转体边缘的P′点打孔,使旋转体质量减少M′,旋转体动平衡校正完毕。本发明还提出使用该方法的动平衡校正设备。该方法通过测量旋转体的振动加速度即可实现校正,传感器和仪器设备简单且操作易行,将各种因素造成的不平衡囊括在内,校正精度和效率高。(A dynamic balance correction method based on a subtractive material comprises the following steps: on the rotating body P 1 Punching twice, the punching direction is parallel to the axial direction, and the mass of the rotating body is reduced by M in sequence 1 、M 2 Measuring acceleration values a and a of the rotating bodies before and after punching at the same speed by means of an acceleration sensor 1 、a 2 (ii) a Determining the vibration force of the rotary body before and after punching based on the mass value and the acceleration value, and calculating to obtain the mass center P of the rotary body before and after punching 2 And a centroid P 3 A location; at P 3 And punching a point P 'on the radius close to the edge of the rotating body to reduce the mass of the rotating body by M', and finishing the dynamic balance correction of the rotating body. The invention also provides a dynamic balance correction device using the method. The method can realize correction by measuring the vibration acceleration of the rotating body, has simple sensor and instrument equipment and easy operation, contains imbalance caused by various factors, and has high correction precision and efficiency.)

1. A dynamic balance correction method based on a material reduction is characterized by comprising the following steps:

1) p on the rotating body₁Punching twice, the punching direction is parallel to the axial direction, and the mass of the rotating body is reduced by M in sequence₁、M₂Measuring acceleration values a and a of the rotating bodies before and after punching at the same speed by means of an acceleration sensor₁、a₂；

2) Determining the vibration force of the rotary body before and after punching based on the mass value and the acceleration value in the step 1), and calculating to obtain the mass center P of the rotary body before and after punching₂And a centroid P₃A location;

3) the centroid P based on the step 2)₃At P₃And punching a point P 'on the radius close to the edge of the rotating body to reduce the mass of the rotating body by M', and finishing the dynamic balance correction of the rotating body.

2. The dynamic balance correction method based on the subtractive material as claimed in claim 1, wherein: the step 1) is specifically to measure the vibration acceleration a of the rotating body rotating at a set speed; p at a rotating body of mass m₁The point is drilled with a depth l parallel to the axial direction₁Hole of (2), mass reduction of rotating body M₁Said P is₁Measuring the vibration acceleration a of the rotating body at a set speed₁(ii) a At the P₁Pointing again to a depth of l₂Hole of (2), mass reduction of rotating body M₂Measuring the vibration acceleration a of the rotating body rotating at a set speed₂。

3. The dynamic balance correction method based on the subtractive material as claimed in claim 1, wherein: the vibration force in the step 2) is calculated by the following method:

reducing the vibration force of the rotary body before material reduction:

F₁＝m·a，

reducing material M₁Rear vibration force:

F₂₁＝(m-M₁)·a₁，

reducing material M₂Rear vibration force:

F₂₂＝(m-M₁-M₂)·a₂。

4. the dynamic balance correction method based on the subtractive material as claimed in claim 1, wherein: the centroid P in the step 2)₂Is calculated by:

wherein θ is the P₁Point, centroid P₂Angle P between the arc tube and the circle center O₁OP₂B is the centroid P₂Distance from center O according to P₁Calibrating centroid P by point position and relative relation₂Location.

5. The dynamic balance correction method based on the subtractive material as claimed in claim 1, wherein: the centroid P in the step 2)₃Is calculated by:

wherein x is₃、y₃Is derived from ODot, with OP₂Are coordinates in an x-axis rectangular coordinate system.

6. The dynamic balance correction method based on the subtractive material as claimed in claim 1, wherein: the distance from the punching correction point P ' to the circle center O in the step 3) is r ', and the material reduction mass M ' is obtained by the following calculation:

wherein the center of mass P₃Distance r to the center O₃：

7. A subtractive material based dynamic balance correction apparatus comprising: dynamic balance measuring device, correcting unit and display screen punch.

8. The subtractive material based dynamic balance correction apparatus according to claim 7, wherein: the dynamic balance measuring device comprises a base, a vertical rod, an L-shaped connecting frame, an acceleration sensor, a rotating body to be measured and a laser velometer; the vertical pole setting place with the base is connected, installs in the pole setting L type link, install on it acceleration sensor, it is down for the rotator mounted position that awaits measuring and rotator inside are rotated by brushless motor drive, and its right side edge is installed the laser velometer.

9. The subtractive material based dynamic balance correction apparatus according to claim 7, wherein: the punching correction device comprises an electric drill bracket, an electric drill wrench, a clamp, a slide rail, a rotating body to be punched and a weighing device; the electric drill bracket is mounted on the upright rod, and the electric drill is mounted on the side surface of the bracket; the rotary body to be punched is arranged below the electric drill, the rotary body is fixed by the clamp, the weighing device is arranged below the rotary body, and the clamp can slide on the sliding rail.

Technical Field

The invention relates to a dynamic balance correction method and equipment based on a material reduction.

Background

The deviation of the gravity center of the rotating component from the rotating shaft center can cause the rotating mechanism to generate additional radial force, so that the whole equipment generates vibration with different degrees, the slight vibration can cause the mechanical mechanism to be loosened, and the whole equipment is damaged or even the life and property safety is threatened in serious cases. The dynamic balance correction eliminates the unbalanced state of the component by changing the mass distribution of the rotating body to make the center of mass return to the axial center position.

The existing dynamic balance correction usually needs to be completed through a complex calculation method by means of a large number of sensors and expensive measuring equipment, and the cost and the efficiency of the correction are low. Therefore, it is necessary to provide a simple and easy dynamic balance correction method, which can quickly correct the dynamic balance performance of the rotating body by using a common sensor and a simple calculation method.

Disclosure of Invention

In order to solve the problems, the invention provides a dynamic balance correction method and equipment based on a material reduction, which can realize the quick correction of the dynamic balance performance of a rotating body by simple calculation only by using a sensor and punching equipment.

A dynamic balance correction method and equipment based on a subtractive material are used for correcting the unbalance of a rotating body, and the method comprises the following steps:

a dynamic balance correction method based on a material reduction is characterized by comprising the following steps:

1) p on the rotating body₁Punching twice, the punching direction is parallel to the axial direction, and the mass of the rotating body is reduced by M in sequence₁、M₂Measuring acceleration values a and a of the rotating bodies before and after punching at the same speed by means of an acceleration sensor₁、a₂；

2) Determining the vibration force of the rotary body before and after punching based on the mass value and the acceleration value in the step 1), and calculating to obtain the mass center P of the rotary body before and after punching₂And a centroid P₃A location;

3) the centroid P based on the step 2)₃At P₃And punching a point P 'on the radius close to the edge of the rotating body to reduce the mass of the rotating body by M', and finishing the dynamic balance correction of the rotating body.

Further, the step 1) is specifically to measure the vibration acceleration a of the rotating body rotating at a set speed; at P of a rotating body of mass M₁The point is drilled with a depth l parallel to the axial direction₁Hole of (2), mass reduction of rotating body M₁Said P is₁Measuring the vibration acceleration a of the rotating body at a set speed₁(ii) a At the P₁Pointing again to a depth of l₁Hole of (2), mass reduction of rotating body M₂Measuring the vibration acceleration a of the rotating body rotating at a set speed₂。

Further, the step 2) vibration force is calculated by the following method:

reducing the vibration force of the rotary body before material reduction:

F₁＝m·a,

reducing material M₁Rear vibration force:

F₂₁＝(m-M₁)·a₁，

reducing material M₂Rear vibration force:

F₂₂＝(m-M₁-M₂)·a₂。

further, the centroid P in the step 2)₂Is calculated by:

wherein θ is the P₁Point, centroid P₂Angle P between the arc tube and the circle center O₁OP₂B is the centroid P₂Distance from center O according to P₁Calibrating centroid P by point position and relative relation₂Location.

Further, the centroid P in the step 2)₃Is calculated by:

wherein x is₃、y₃Using O as origin and OP₂Are coordinates in an x-axis rectangular coordinate system.

Further, the distance from the punching correction point P ' of the step 3) to the circle center O is r ', and the material reduction mass M ' is obtained by the following calculation:

wherein the center of mass P₃Distance r to the center O₃：

The invention also provides a dynamic balance correction device based on the material reduction, which comprises: the device comprises a dynamic balance measuring device, a punching correcting device and a display screen; the dynamic balance measuring device comprises a base, a vertical rod, an L-shaped connecting frame, an acceleration sensor, a rotating body to be measured and a laser velometer; the vertical rod is vertically placed and connected with the base, the L-shaped connecting frame is installed on the vertical rod, the acceleration sensor is installed on the vertical rod, the installation position of the rotating body to be detected is below the acceleration sensor, the rotating body is driven by the brushless motor to rotate, and the laser velometer is installed on the edge of the right side of the rotating body; the punching correction device comprises an electric drill bracket, an electric drill wrench, a clamp, a slide rail, a rotating body to be punched and a weighing device; the electric drill bracket is mounted on the upright rod, and the electric drill is mounted on the side surface of the bracket; the rotary body to be punched is arranged below the electric drill, the rotary body is fixed by the clamp, the weighing device is arranged below the rotary body, and the clamp can slide on the sliding rail. The display screen is used for displaying the real-time rotating speed of the rotating body to be measured and the mass value of the rotating body to be measured.

The invention provides a dynamic balance correction method and a device thereof, which are used for correcting the dynamic balance of the rotor by the same position P on the rotor₁Punching twice, and measuring the mass and the vibration acceleration of the rotating body after each operation, so as to calculate and obtain the position of the mass center of the rotating body; and punching a point P 'on the radius of the mass center, which is close to the edge of the rotating body, to reduce the material quantity M' and finish the correction of the dynamic balance of the rotating body. Compared with the existing dynamic balance correction method, the method can realize correction by measuring the vibration acceleration of the rotating body, the sensor and the instrument are simple and easy to operate, and various factors are changedThe unbalance is contained, and the correction precision and efficiency are high.

Drawings

FIG. 1 is a flow chart of the present invention.

Fig. 2 is a schematic perspective view of a dynamic balance correction apparatus according to the present invention.

FIG. 3 shows the punching point P₁With the original center of mass P₂Schematic diagram of the position relationship of (1).

FIG. 4 is a schematic view of the center of mass of the hole-punching calibration rotating body.

Description of the main elements

Base 1

Vertical rod 2

L-shaped connecting frame 3

Acceleration sensor 31

Rotating body to be measured 32

Laser speed meter 33

Electric drill support 4

Electric drill 41

Electric drill wrench 42

Clamp 43

Slide rail 44

To-be-punched rotary body 45

Weighing device 46

Display screen 5

Detailed Description

The invention is further described below with reference to the accompanying drawings.

A dynamic balance correction method based on a material reduction is characterized by comprising the following steps:

1) p on the rotating body₁Punching twice, the punching direction is parallel to the axial direction, and the mass of the rotating body is reduced by M in sequence₁、M₂Measuring acceleration values a and a of the rotating bodies before and after punching at the same speed by means of an acceleration sensor₁、a₂；

2) Determining the vibration of the rotary body before and after punching based on the mass value and the acceleration value of the step 1)Force, calculating to obtain the centroid P of the rotary body before and after punching₂And a centroid P₃A location;

3) the centroid P based on the step 2)₃At P₃And punching a point P 'on the radius close to the edge of the rotating body to reduce the mass of the rotating body by M', and finishing the dynamic balance correction of the rotating body.

The mass and the acceleration in the step 1) are obtained by the following method:

firstly, mounting the rotating body at the position of the rotating body to be detected 32 on the L-shaped connecting frame, starting a motor, observing the display screen 5, adjusting the rotating speed to a set speed, and reading the vibration acceleration a of the rotating body; the rotating body is fixed by means of a clamp 43 at the position of the rotating body 45 to be perforated, the mass m of the rotating body is measured by means of a weighing device 46, and a point P of the rotating body is selected₁R away from the center O of the rotating body, and the electric drill wrench 42 is pulled down to start the electric drill at P₁The point is drilled with a depth l parallel to the axial direction₁Of the rotating body, the mass of the rotating body being reduced by M₁Installing the rotary body on the L-shaped connecting frame, starting the motor, observing the display screen, regulating the rotation speed to a set speed, and reading the vibration acceleration a of the rotary body₁(ii) a Fixing the rotator at the position of the rotator to be punched 45 by the fixture 43, and pulling the electric drill wrench downwards to start the electric drill at P₁The point continues to be drilled with a depth l parallel to the axial direction₂Of the rotating body, the mass of the rotating body being reduced by M₂Installing the rotating body at the position of the rotating body 32 to be measured on the L-shaped connecting frame, starting the motor, observing the display screen 5, adjusting the rotating speed to a set speed, and reading the vibration acceleration a of the rotating body₂。

The vibration force in the step 2) is calculated by the following method:

reducing the vibration force of the rotary body before material reduction:

F₁＝m·a,

reducing material M₁Rear vibration force:

F₂₁＝(m-M₁)·a₁，

reducing material M₂Rear vibration force:

F₂₂＝(m-M₁-M₂)·a₂。

the centroid P in the step 2)₂Is calculated by:

wherein θ is the P₁Point, centroid P₂Angle P between the arc tube and the circle center O₁OP₂B is the centroid P₂Distance from center O according to P₁Calibrating centroid P by point position and relative relation₂Location.

The centroid P in the step 2)₃Is calculated by:

wherein x is₃、y₃Using O as origin and OP₂As coordinates in the x-axis rectangular coordinate system, the centroid P₃The position is calibrated on the rotating body.

The distance from the punching correction point P ' to the circle center O in the step 3) is r ', and the material reduction mass M ' is obtained by the following calculation:

wherein the center of mass P₃Distance r to the center O₃：

Fixing the rotator at the position of the rotator 45 to be punched by a clamp 43, selecting a punching correction point P ' of the rotator, wherein the punching correction point P ' is away from the center O of the rotator by a distance r ', downwards pulling an electric drill wrench 42 to start an electric drill to punch holes in a point P ' parallel to the axial direction, so that the mass of the rotator is reduced by M ', and the dynamic balance correction of the rotator is finished.

The invention provides a dynamic balance correction method and a device thereof, which are used for correcting the dynamic balance of the rotor by the same position P on the rotor₁Punching twice, and measuring the mass and the vibration acceleration of the rotating body after each operation, so as to calculate and obtain the position of the mass center of the rotating body; and punching a point P 'on the radius of the mass center, which is close to the edge of the rotating body, to reduce the material quantity M' and finish the correction of the dynamic balance of the rotating body. Compared with the existing dynamic balance correction method, the method can realize correction by measuring the vibration acceleration of the rotating body, the sensor and the instrument are simple and easy to operate, unbalance caused by various factors is included, and the correction precision and efficiency are high.

The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that when one component is referred to as being "mounted" on another component, it can be directly mounted to the other component or there can be both centrally located components. When a component is referred to as being "disposed" to another component, it can be directly disposed on the other component or intervening components may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Although the present invention has been described in detail with reference to the above embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.