JP2001108557A - Dynamic balancing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make one-plane measurements by means of a dynamic balancing machine without requiring circuit calibration and expensive jigs. SOLUTION: In the horizontal balancing machine provided with a pair of vibrating frames 2, 3 having bearing parts, the drive part side vibrating frame 2 which drives and rotates a test piece is provided with an elastic member (plate spring 6) of high torsional rigidity, which is used as the bearing part. The bearing part is replaceable with either a sleeve bearing 4 or a roller bearing 5 and a measuring apparatus 1 can make one-plane measurements and two-plane measurements.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal dynamic balance testing machine.

[0002]

2. Description of the Related Art Generally, a cross fan and a propeller fan are often balanced by a horizontal dynamic balance tester. The cross fan is slightly bent because it contains rubber and does not have a shaft.To balance the cross fan, use a sleeve bearing on the drive side of the dynamic balance tester and use a roller on the driven side. Two-sided measurements are made using a bearing. In addition, since propeller fans are based on holes,
When the propeller fan is balanced, the propeller fan is attached to the arbor, and one surface measurement is performed using two roller bearings. When one-surface measurement is performed by the dynamic balance testing machine in this way, static / unbalance measurement is performed by the static / even correction surface separation circuit (see FIG. 6).

[0003]

However, as described above, in order to measure one surface of a propeller fan with a general-purpose dynamic balance tester, an expensive jig (arbor) and a complicated circuit (static / even correction surface) are required. Separation circuit) Calibration is required, which increases costs and complicates measurement work.

An object of the present invention is to make it possible to perform one-surface measurement on a dynamic balance tester without requiring circuit calibration or expensive jigs.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is, for example, as shown in FIG. 1, equilibrated with a pair of horizontal vibration pedestals (2, 3) having bearing portions. Measuring device (1) capable of one-surface measurement and two-surface measurement in a test machine, and bearings (4, 5) of a vibration gantry on the drive unit side
And an elastic member having a high torsional rigidity (for example, a leaf spring 6) for supporting the elastic member.

Here, a parallel leaf spring is generally used as the elastic member, and the width of the leaf spring is increased in order to increase the torsional rigidity.

As described above, according to the first aspect of the present invention, an elastic member having high torsional rigidity is provided on the vibration base.
By providing a measuring device capable of surface measurement and two-surface measurement, when performing one-surface measurement of a propeller fan or the like with a bearing at the bearing, only parallel vibration is detected by the elastic member of the vibration gantry. One-surface measurement can be performed without using calibration. In addition, since the measurement device can also perform two-surface measurement, there is no need to prepare a plurality of devices, and the cost is not increased.

According to a second aspect of the present invention, there is provided the dynamic balance tester according to the first aspect, wherein the bearing portion of the vibration gantry on the drive section side is either a sleeve bearing (4) or a roller bearing (5). It is interchangeable.

As described above, according to the second aspect of the present invention, the bearing portion can be replaced with either a sleeve bearing or a roller bearing.
For example, a cross fan or the like having no shaft or a propeller fan with a hole as a reference is measured, and a general rotor with a shaft or the like can be measured using a roller bearing. Therefore, the balancing can be performed by one testing machine without using a special jig such as an arbor.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a dynamic balance tester according to the present invention will be described below with reference to FIGS. FIGS. 1 to 3 are schematic side views showing a state in which test specimens are balanced using a dynamic balancing tester as an example to which the present invention is applied. FIG. 1 shows a state in which a cross fan is balanced. FIG. 2 shows a state in which the propeller fan is balanced, and FIG. 3 shows a state in which the general rotor is balanced. In the figure, 1 is a measuring device, 2,
Reference numeral 3 denotes a vibration stand, 4 denotes a sleeve bearing, and 5 denotes a roller bearing.

The measuring device 1 is a measuring device capable of one-surface measurement and two-surface measurement, and the measuring device 1 is not combined with a static / even correction surface separation circuit. The vibration gantry 2 on the side of a driving unit (not shown) for driving the test body to rotate has a leaf spring 6 having high torsional rigidity. Here, the leaf spring 6 has a spring width as large as possible so as to exhibit high rigidity. The vibration mounts 2 and 3 support a bearing portion for supporting the test body on an upper portion thereof, and the bearing portion includes a sleeve bearing 4.
And the roller bearing 5 can be selected.

As shown in FIG. 4, the sleeve bearing 4 is provided with a jig 7 having a protruding portion 8 at the tip, and the protruding portion 8 does not have a propeller fan 10 based on a hole or a shaft. It can be inserted into the cross fan 9 (see FIGS. 1 and 2). As shown in FIG. 5, the roller bearing 5 is mounted on two horizontally arranged rollers 11, 11 such that the shaft of the test body contacts the rollers 11, 11.

The cross fan 9, the propeller fan 10 and the general rotor 12 are test specimens. The cross fan 9 does not have a shaft as described above, and is substantially cylindrical (see FIG. 1).
Therefore, balancing is performed by two-sided measurement. Propeller fan 1
0 is a hole reference and has a shape close to a thin disk as shown in FIG. Further, as shown in FIG. 3, the general rotor 12 has a shaft and is substantially cylindrical, so that two-side measurement is performed as in the case of the cross fan 9.

Next, a balancing method using the above-described dynamic balancing tester will be described. First, when the cross fan 9 is balanced, the sleeve bearing 4 is installed on the vibration gantry 2 and the roller bearing 5 is installed on the vibration gantry 3 as shown in FIG. The projecting portion 8 of the jig 7 of the sleeve bearing 4 is inserted into one end of the cross fan 9, and the other end abuts on the rollers 11 of the roller bearing 5 so that the cross fan 9 is horizontal. Then, the cross fan 9 is rotated by the driving device, and the two devices are measured by the measuring device 1 so as to balance.

The balance of the propeller fan 10 is performed only by the vibration gantry 2. As in the case of the cross fan 9 described above, the sleeve bearing 4 is installed on the vibration gantry 2, the protrusion 8 of the jig 7 of the sleeve bearing 4 is inserted into the propeller fan 10, and the propeller fan 10 is rotated. Then, one surface measurement is performed by the measuring device 1.

When the general rotor 12 is to be balanced, roller bearings 5 and 5 are installed on the vibration gantry 2 and 3, and the shaft 13 of the general rotor 12 is connected to the roller 1 of each roller bearing 5.
Abut on 1,11. Then, in the same manner as in the case of the cross fan 9 described above, the general rotor 12 is rotated, and the measurement device 1 performs two-surface measurement to perform balancing.

As described above, according to the dynamic balance tester of the above embodiment, the leaf spring 6 having high torsional rigidity is
Is provided, it is possible to suppress torsional vibration unnecessary for one-plane measurement and to detect only parallel vibration, so that there is no need to combine circuit calibration (static / even-corrected plane separation circuit) with the measuring apparatus 1. In addition, since the bearings on the vibration gantry 2 and 3 can be either the sleeve bearing 4 or the roller bearing 5, a test piece without a shaft (cross fan) can be used without using a special jig such as an arbor. 9,
Specimen with propeller fan 10) and shaft (general rotor 1)
2) can be balanced by the same dynamic balance tester. In addition, since the measuring device 1 can perform one-surface measurement and two-surface measurement, there is no need to prepare a plurality of dynamic balance testing machines having different measuring devices, and the cost is not increased.

In the above-described embodiment, a cross fan, a propeller fan, and a general rotor are used as test specimens. However, the present invention is not limited to this. It is surprisingly applicable. In addition, the shape and the like of the vibration gantry are arbitrary, and in addition,
Needless to say, the specific detailed structure can be appropriately changed.

[0019]

As described above, according to the dynamic balance tester according to the first aspect of the present invention, only the parallel vibration is detected by providing the elastic member having high torsional rigidity on the vibration base. , Such as propeller fan without circuit calibration
Surface measurements can be made. In addition, since the measurement device can perform one-surface measurement and two-surface measurement, there is no need to prepare a plurality of devices.

According to the dynamic balance tester according to the second aspect of the present invention, since the bearing portion can be replaced with either a sleeve bearing or a roller bearing, a bearing having no shaft such as a cross fan, a propeller fan or the like can be used. Use a sleeve bearing to measure the hole-based ones, and use a roller bearing to measure the ones with a shaft such as a general rotor, so that they can be balanced with a single testing machine without using special jigs such as arbors. It can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a state in which a cross fan is balanced using a dynamic balancing tester as an example to which the present invention is applied.

FIG. 2 is a schematic side view showing a state where a propeller fan is balanced using the dynamic balancing tester in FIG. 1;

FIG. 3 is a schematic side view showing a state in which a general rotor is balanced by using the dynamic balancing tester in FIG. 1;

FIG. 4 is a side view showing the structure of the sleeve bearing.

FIG. 5 is a front view showing the structure of the roller bearing.

FIG. 6 is a schematic side view showing a state in which a propeller fan is balanced using a conventional dynamic balancing tester.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Measuring device 2 Vibration gantry 3 Vibration gantry 4 Sleeve bearing 5 Roller bearing 6 Leaf spring 7 Jig 8 Projection part 9 Cross fan 10 Propeller fan 11 Roller 12 General rotor 13 Axis

Claims (2)

[Claims] 1. A balancing tester comprising a pair of horizontal vibration gantry having a bearing portion, a measuring device capable of one-surface measurement and two-surface measurement, and a torsional rigidity for supporting a bearing portion of the vibration gantry on the driving portion side. And a high elastic member. 2. The dynamic balance tester according to claim 1, wherein the bearing portion of the vibration gantry on the drive unit side is replaceable with either a sleeve bearing or a roller bearing.