FAN IMPELLER BALANCE CALIBRATING METHOD

Abstract

A fan impeller balance calibrating method includes steps of: placing a fan impeller onto a measurement platform, the measurement platform having a controller, a speedometer device and a detection device being arranged on the measurement platform for detecting the rotational speed and balance of the fan impeller respectively, the controller receiving data from the speedometer device and the detection device to calculate and generate a detection signal to the measurement platform, according to the received detection signal, the measurement platform displaying calibration data and rotational speed data; and adding at least one weight body to the fan impeller or removing at least one weight body from the fan impeller according to the calibration data to quickly calibrate the balance of the fan impeller. The fan impeller balance calibrating method is advantageous in that the balance calibration time is shortened and the calibration process is simplified.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a fan impeller balance calibrating method, and more particularly to a fan impeller balance calibrating method in which according to calibration data, at least one weight body is added to the fan impeller or at least one weight body is removed from the fan impeller to quickly calibrate the balance of the fan impeller.

2. Description of the Related Art

Along with the rapid development of high-tech industries, the functions of various electronic products have become more and more powerful. As a result, the electronic components inbuilt in the electronic products generate a great amount of waste heat in operation. In general, it is necessary to dispose a heat sink or a radiating fin assembly on the electronic component to increase heat dissipation area for enhancing heat dissipation effect. However, the heat sink or radiating fin assembly can dissipate the heat only by means of radiation so that the heat dissipation effect is limited. Therefore, it is necessary to additionally dispose a cooling fan to carry away the heat of the heat sink or radiating fin assembly so as to enhance the heat dissipation performance. Accordingly, the cooling fan is a very important component of the thermal module. However, in operation, the cooling fan often makes loud noise or severely vibrates due to some external factors or the affection of its own structural design. In this case, the working stability of the electronic component (such as the hard disk) will be affected. Therefore, in manufacturing, it is necessary to calibrate the balance of the fan impeller to increase the ratio of good products.

In the conventional dynamic balance test of the fan impeller, in the case that the fan impeller is unbalanced on one side, a balancing weight is added to the side or removed from the side and then the dynamic balance test of the fan impeller is again performed. Such balance test process is repeatedly performed until the fan impeller is completely balanced. Alternatively, the fan impeller is drilled to calibrate the balance of the fan impeller.

By means of the above method, the balance of the fan impeller can be achieved. However, in the test, it is necessary to add the balancing weight to or remove the balancing weight from the fan impeller to calibrate the balance of the fan impeller. After a long period of use, the balancing weight added to the fan impeller is likely to detach from the fan impeller to deteriorate the balance thereof. This will greatly shorten the lifetime of the fan and make noise as well as cause vibration of the fan. Furthermore, the calibration process must be repeatedly performed. This is time-consuming and complicated. In the case that the fan impeller is drilled to remove a part of the fan impeller for achieving the balance, the drilled part of the fan impeller will be structurally weakened and the stress will concentrate on the weakened part. Under such circumstance, the structure of the fan impeller will be destroyed to shorten the lifetime of the fan. According to the above, the conventional fan impeller balance calibrating method has the following shortcomings:

• • 1. The balancing weight is likely to detach from the fan impeller to make noise and cause vibration of the fan.
  • 2. The lifetime of the fan is greatly shortened.
  • 3. The structure of the fan impeller is destroyed.
  • 4. The calibrating process is complicated.
  • 5. The calibrating process is time-consuming.

SUMMARY OF THE INVENTION

It is therefore a primary object of the present invention to provide a fan impeller balance calibrating method in which according to calibration data, at least one weight body is added to the fan impeller or at least one weight body is removed from the fan impeller to quickly calibrate the balance of the fan impeller.

It is a further object of the present invention to provide the above fan impeller balance calibrating method in which the balance calibration time is shortened.

It is still a further object of the present invention to provide the above fan impeller balance calibrating method in which the calibration process is simplified.

It is still a further object of the present invention to provide the above fan impeller balance calibrating method, which can achieve the balance of the fan impeller without destroying the structure of the fan impeller. Therefore, the lifetime of the fan is prolonged.

To achieve the above and other objects, the fan impeller balance calibrating method of the present invention includes steps of: placing a fan impeller onto a measurement platform, the measurement platform having a controller, a speedometer device and a detection device being arranged on the measurement platform for detecting the rotational speed and balance of the fan impeller respectively, the controller receiving data from the speedometer device and the detection device to calculate and generate a detection signal to the measurement platform, according to the received detection signal, the measurement platform displaying calibration data and rotational speed data; and adding at least one weight body to the fan impeller or removing at least one weight body from the fan impeller according to the calibration data to quickly calibrate the balance of the fan impeller.

BRIEF DESCRIPTION OF THE DRAWINGS

The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:

FIG. 1 is a perspective view of a preferred embodiment of the present invention, showing that a fan impeller is to be balance-calibrated;

FIG. 2 is a perspective view of the preferred embodiment of the present invention, showing that the fan impeller is balance-calibrated;

FIG. 3 is a perspective view of the preferred embodiment of the present invention, showing that a weight body is added into the fan impeller or removed from the fan impeller;

FIG. 4 is a flow chart of the fan impeller balance calibrating method of the present invention; and

FIG. 5 is a block diagram of the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIGS. 1 to 5. FIG. 4 is a flow chart of a preferred embodiment of the fan impeller balance calibrating method of the present invention. According to the preferred embodiment, the fan impeller balance calibrating method of the present invention includes steps of:

100. placing a fan impeller 1 onto a measurement platform 2, the measurement platform 2 having a controller 20, a speedometer device 21 and a detection device 22 being arranged on the measurement platform 2 for detecting the rotational speed and balance of the fan impeller 1 respectively, the controller 20 receiving the data from the speedometer device 21 and the detection device 22 to calculate and generate a detection signal to the measurement platform 2, according to the received detection signal, the measurement platform 2 displaying calibration data and rotational speed data; and

101. adding at least one weight body 3 to the fan impeller 1 or removing at least one weight body 3 from the fan impeller 1 according to the calibration data to quickly calibrate the balance of the fan impeller 1.

In step 100, the fan impeller 1 is placed onto a test section 23 of the measurement platform 2 for test (with reference to FIGS. 1 and 2). One face of the fan impeller 1 faces the speedometer device 21 on the measurement platform 2, while the other face of the fan impeller 1 right faces the detection device 22 on the measurement platform 2. When the dynamic balance test of the fan impeller 1 starts, the speedometer device 21 drives the fan impeller 1 in the test section 23, whereby the speedometer device 21 drives the fan impeller 1 to rotate and at the same time detects the rotational speed of the fan impeller 1. Simultaneously, the detection device 22 starts to detect the balance of the fan impeller 1. The detection device 22 employs a flashlight to quickly judge the unbalanced angle of the fan impeller 1. The controller 20 receives the rotational speed data from the speedometer device 21 and the balance data from the detection device 22 to calculate and generate the detection signal to the measurement platform 2. According to the received detection signal, a display device 24 on the measurement platform 2 displays the calibration data and rotational speed data. The detection signal contains the calibration data and rotational speed data. The controller 20 is electrically connected to the speedometer device 21, the detection device 22 and the display device 24.

In step 101, according to the calibration data displayed on the display device 24, an operator can quickly decide the number of the weight bodies 3 added to the fan impeller 1 (with reference to FIGS. 2 and 3). In other words, in the case that the numeral of the calibration data displayed on the display device 24 is higher than a preset balance value of the fan impeller 1, then the weight value of the weight bodies 3 is reduced according to the calibration data. In the case that the numeral of the calibration data displayed on the display device 24 is lower than the preset balance value of the fan impeller 1, then the weight value of the weight bodies 3 is increased according to the calibration data. In the conventional calibrating method, it is necessary to repeatedly perform the dynamic balance test to the unbalanced side of the fan impeller until the fan impeller 1 is totally balanced. Therefore, the conventional calibrating method is laborious, time-consuming and complicated. In contrast, in the present invention, the calibration data are displayed on the display device 24 to enable an operator to quickly decide whether the weight value of the weight bodies 3 of the fan impeller 1 should be increased or reduced. Accordingly, the balance calibration time is shortened and the calibration process is simplified.

The weight bodies 3 are made of hardened plastic material. The weight bodies 3 are detachably adhered to an inner side of the fan impeller 1. The weight bodies 3 have different weight values and are coupled with the fan impeller 1 according to the numeral of the calibration data displayed on the display device 24 of the measurement platform 2.

In addition, it should be noted that the weight bodies 3 are in a soft adhesive state when not used or used. The weight bodies 3 have better adhesion so that when adding the weight bodies 3 into the fan impeller 1, the weight bodies 3 can be quickly securely adhered to the fan impeller 1. By means of projecting light onto the weight bodies 3, the weight bodies 3 can quickly harden to integrally combine with the fan impeller 1. Accordingly, the balance of the fan impeller 1 can be achieved without destroying the structure of the fan impeller 1. In contrast, in the conventional calibrating method, it is necessary to excavate a part of the fan impeller for achieving the balance of the fan impeller. In comparison with the conventional balance calibrating method, the balance calibration time of the present invention is shortened and the calibration process is simplified to greatly prolong the lifetime of the fan.

In conclusion, in comparison with the conventional balance calibrating method, the present invention has the following advantages:

• • 1. The calibration process is simplified.
  • 2. The lifetime of the fan is greatly prolonged.
  • 3. The balance calibration time is shortened.

The present invention has been described with the above embodiments thereof and it is understood that many changes and modifications in the above embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.

Claims

1. A fan impeller balance calibrating method comprising steps of:

placing a fan impeller onto a measurement platform, the measurement platform having a controller, a speedometer device and a detection device being arranged on the measurement platform for detecting the rotational speed and balance of the fan impeller respectively, the controller receiving data from the speedometer device and the detection device to calculate and generate a detection signal to the measurement platform, according to the received detection signal, the measurement platform displaying calibration data and rotational speed data; and

adding at least one weight body to the fan impeller or removing at least one weight body from the fan impeller according to the calibration data to quickly calibrate the balance of the fan impeller.

2. The fan impeller balance calibrating method as claimed in claim 1, wherein the detection device employs a flashlight to judge the unbalanced angle of the fan impeller.

3. The fan impeller balance calibrating method as claimed in claim 1, wherein the detection signal contains the calibration data and the rotational speed data.

4. The fan impeller balance calibrating method as claimed in claim 1, wherein the weight bodies are coupled with the fan impeller according to the numeral of the calibration data displayed by the measurement platform.

5. The fan impeller balance calibrating method as claimed in claim 1, wherein the weight bodies have different weight values.

6. The fan impeller balance calibrating method as claimed in claim 1, wherein in the case that the numeral of the calibration data is higher than a preset balance value of the fan impeller, then the weight value of the weight bodies is reduced.

7. The fan impeller balance calibrating method as claimed in claim 1, wherein in the case that the numeral of the calibration data is lower than a preset balance value of the fan impeller, then the weight value of the weight bodies is increased.

8. The fan impeller balance calibrating method as claimed in claim 1, wherein the weight bodies are made of hardened plastic material and detachably adhered to an inner side of the fan impeller.