阅读说明：本技术 叶轮的动平衡方法 (Dynamic balancing method of impeller ) 是由 肖江东 周忠义 刘琨 于 2019-09-20 设计创作，主要内容包括：根据本发明的叶轮的动平衡方法,包括以下步骤步骤1,使用动平衡机对叶轮进行动平衡试验,根据动平衡机的指示,确定叶轮需要平衡的相位和需要的平衡质量；步骤2,分别在叶轮的轮盘与轮盖径向边缘的相位处钻取若干数量的配重孔洞；步骤3,计算铅水配重的重量；步骤4,在配重孔洞中灌注铅水配重,并使用铝焊封堵配重孔洞；步骤5,使用动平衡机对叶轮进行动平衡试验,检测叶轮的不平衡量是否在规定范围内,结果为是,进入下一步,结果为否,进入步骤1；步骤6,结束动平衡试验。本发明的叶轮的动平衡方法,叶轮表面无凹凸不平的配重块和孔洞,大大降低了由于配重块或孔洞与空气摩擦形成的气动噪声,而且避免了啸叫的产生。(The dynamic balancing method of the impeller comprises the following steps of 1, performing dynamic balancing test on the impeller by using a dynamic balancing machine, and determining the phase and the required balancing mass of the impeller according to the indication of the dynamic balancing machine; step 2, drilling a plurality of counterweight holes at the phase positions of the radial edges of the wheel disc and the wheel cover of the impeller respectively; step 3, calculating the weight of the molten lead counterweight; step 4, pouring molten lead into the counterweight holes to form counterweights, and sealing the counterweight holes by using aluminum welding; step 5, performing a dynamic balance test on the impeller by using a dynamic balancing machine, detecting whether the unbalance amount of the impeller is within a specified range, if so, entering the next step, if not, entering the step 1; and 6, ending the dynamic balance test. According to the dynamic balance method of the impeller, uneven balancing weights and holes are not arranged on the surface of the impeller, so that pneumatic noise caused by friction between the balancing weights or the holes and air is greatly reduced, and squeaking is avoided.)

1. A method of dynamic balancing of an impeller, comprising the steps of:

step 1, performing a dynamic balance test on the impeller by using a dynamic balancing machine, and determining a phase required to be balanced and a required balance mass of the impeller according to an instruction of the dynamic balancing machine;

step 2, drilling a plurality of counterweight holes at the phase positions of the radial edges of the wheel disc and the wheel cover of the impeller respectively;

step 3, calculating the weight of the molten lead counterweight;

step 4, pouring a lead water counterweight into the counterweight hole, and sealing the counterweight hole by using aluminum welding;

step 5, performing a dynamic balance test on the impeller by using a dynamic balancing machine, detecting whether the unbalance amount of the impeller is within a specified range, if so, entering the next step, if not, entering the step 1;

and 6, ending the dynamic balance test.

2. The dynamic balancing method of an impeller according to claim 1, characterized in that:

in the step 2, when the initial unbalance amount is large, the depth of the weight hole is less than 30mm, and the diameter of the weight hole is 8-12 mm.

3. The dynamic balancing method of an impeller according to claim 1, characterized in that:

in step 3, the mass of the material removed in step 2 is taken into account when calculating the weight of the molten lead weight.

4. The dynamic balancing method of an impeller according to claim 1, characterized in that:

and 4, reserving an aluminum welding plugging position.

5. The dynamic balancing method of an impeller according to claim 4, wherein:

wherein, the reserved aluminum welding plugging depth is more than 6 mm.

6. The dynamic balancing method of an impeller according to claim 1, characterized in that:

wherein, the dynamic balance grade of the impeller is G-6.3 grade,

formula for calculating allowable unbalance amount

In the formula: m is_per-allowingAn unbalance amount (g);

m-represents the rotor's own weight (kg);

g-represents the balance accuracy class (mms) of the rotor;

r-represents the corrected radius of the rotor (mm);

n-represents the rotational speed (rpm) of the rotor.

Technical Field

The invention belongs to the technical field of centrifugal ventilators, and particularly relates to a dynamic balance method of an impeller.

Background

Centrifugal ventilators are widely used for ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught in boilers and industrial kilns; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; the wind tunnel wind source and the air cushion boat are widely applied in a plurality of fields such as inflation and propulsion.

Disclosure of Invention

In order to solve the above problems, the present invention provides a dynamic balancing method of an impeller.

The invention provides a dynamic balance method of an impeller, which is characterized by comprising the following steps: step 1, performing a dynamic balance test on an impeller by using a dynamic balancing machine, and determining a phase position and a required balance mass of the impeller, which are required to be balanced, according to the indication of the dynamic balancing machine;

step 2, drilling a plurality of counterweight holes at the phase positions of the radial edges of the wheel disc and the wheel cover of the impeller respectively;

step 3, calculating the weight of the molten lead counterweight;

step 4, pouring molten lead into the counterweight holes to form counterweights, and sealing the counterweight holes by using aluminum welding;

step 5, performing a dynamic balance test on the impeller by using a dynamic balancing machine, detecting whether the unbalance amount of the impeller is within a specified range, if so, entering the next step, if not, entering the step 1;

and 6, ending the dynamic balance test.

The dynamic balancing method of the impeller provided by the invention can also have the following characteristics: in the step 2, when the initial unbalance amount is large, the depth of the weight hole is less than 30mm, and the diameter of the weight hole is 8-12 mm.

In addition, the dynamic balancing method of the impeller according to the present invention may further include: in step 3, the mass of the material removed in step 2 is taken into account when calculating the weight of the molten lead weight.

In addition, the dynamic balancing method of the impeller according to the present invention may further include: and 4, reserving an aluminum welding plugging position.

In addition, the dynamic balancing method of the impeller according to the present invention may further include: wherein, the reserved aluminum welding plugging depth is more than 6 mm.

In addition, the dynamic balancing method of the impeller according to the present invention may further include: wherein, the dynamic balance grade of the impeller is G-6.3 grade,

formula for calculating allowable unbalance amount

In the formula: m is_per-allowing an unbalance amount (g);

m-represents the rotor's own weight (kg);

g-represents the balance precision level (m/s) of the rotor;

r-represents the corrected radius of the rotor (mm);

n-represents the rotational speed (rpm) of the rotor;

action and Effect of the invention

According to the dynamic balance method of the impeller, the dynamic balance mode of punching holes on the radial edge of the impeller, filling lead and then sealing by aluminum welding is adopted, and the dynamic balance mode has the beneficial effects that: after the impeller is in dynamic balance, uneven balancing weights and holes do not exist on the surface of the impeller, so that pneumatic noise caused by friction between the balancing weights or the holes and air is greatly reduced, and squeaking is avoided. The dynamic balance method of the impeller has the advantages of improving the efficiency of the fan, reducing wind noise and avoiding squeaking.

Drawings

FIG. 1 is a schematic front view of an impeller in an embodiment of the invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic front view of an impeller according to an embodiment of the present invention; and

fig. 4 is a schematic top view of fig. 3.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following embodiments are specifically described in the dynamic balancing method of the impeller of the invention with reference to the attached drawings.