KR20060113241A - Fan blade balancing testing apparatus for cooling tower - Google Patents

Abstract

A fan blade balancing testing apparatus for a cooling tower is provided to promote a quality enhancement of a blade by solving an unbalance of the blade regardless of the skill level of workers with adjusting a balancing of the blade on the basis of a measured value provided quantitatively. In a fan blade balancing testing apparatus for a cooling tower, a frame(20) is installed by being laid on a ground in a state of maintaining an upper side thereof to be paralleled. A supporting unit(40) coupled at an upper part of the frame supports a blade and makes a weight caused by the blade to be acted to a load cell mounted therein. And, a computer displays a measured value transferred from the load cell of the supporting unit.

Description

Blade balancing inspection device for cooling tower fan {FAN BLADE BALANCING TESTING APPARATUS FOR COOLING TOWER}

1 is a view for explaining an example of a fan that the blade balancing inspection device of the cooling tower fan according to the present invention.

2 shows the blade of the fan of FIG. 1 in detail;

3 is a view for explaining the technical idea of the blade balancing inspection device of the fan for the cooling tower according to the present invention;

4 to 6 are front, plan and right side views for explaining the blade balancing inspection device of the fan for the cooling tower according to an embodiment of the present invention;

7a and 7b are views showing in detail the positioning unit in the blade balancing inspection device of the fan for the cooling tower according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1: fan 2: hub

3: blade 4: (blade) neck

5: (blade) wing 10: Balancing inspection device (of cooling tower fan)

20: frame 22: first side bar

24: second side bar 25: connection bar

26: bottom bar 28: height adjustment leg

30: main rail 40: supporting unit

42: load cell 44: supporting bar

46: support plate 48: base plate

50: setting slot 52, 86: holding lug

56: stopper 62: sub-rail

64: rail case 70: positioning unit

72: setting block 73, 91: locking hole

74: locking slot 76: locking bar

78, 88: fixed plate 80: (linear) scale

82: scale guider 84: scale slider

90: setting bar

The present invention relates to a blade balancing inspection device of a fan for a cooling tower, and more particularly, a blade balancing inspection device for a fan for a cooling tower to check and adjust an imbalance of a blade constituting a fan used in a forced air cooling tower. It is about.

In recent years, in order to maintain a comfortable indoor environment due to the enlargement of buildings, air conditioning devices of buildings are essential. In addition, a large amount of cooling water is required at industrial sites, and it is difficult to continuously supply high quality industrial water in large quantities. Therefore, in order to protect and regenerate scarce water resources, it is generally used once to cool the water after the temperature has risen. I use it.

The cooling tower is mainly used for large-scale cooling operation. Cooling in a cooling tower is usually carried out in two ways: by heat transfer using the temperature difference between water and air and latent heat by mass transfer using the evaporation of the water itself. Among them, the most effective effect is the evaporation of water, and in order to maximize the effect, it is necessary to increase the relative speed, contact area, and contact time of water and air. . In general, forced air cooling towers include axial fans, speed reduction devices, water distribution systems, drift eliminators, fills, fan stacks, It consists of casing, water basin, and drive motor.

The forced blow type cooling tower disperses hot water over the packing material to flow the surface of the packing material, and then forcibly blows air around the packing material using a fan, thereby cooling the hot water by heat transfer of air and hot water. Forced blow-type cooling tower using fan is most suitable for industrial and air-conditioning because it does not rely on natural ventilation and has the advantage of large cooling effect, stable performance, and small size and light weight because it uses air to blow air. It is a chiller used.

On the other hand, a problem that arises in the widely used forced air cooling tower is the generation of noise and vibration. Various forms of noise and vibration have been suggested. Typically, about 40% of the cooling tower vibrations are caused by the imbalance of the rotating body.

The present applicant has proposed a technology that can reduce the vibration of the fan stack by constantly adjusting the roundness of the fan stack through the Republic of Korea Patent Application No. 10-2003-0098417 "fan stack of the cooling tower". As described above, the applicant proposed a prior application to reduce the problems of noise and vibration in the cooling tower by supplementing the fan stack, but it is necessary to overcome the imbalance of the rotating body which is the main cause of the cooling tower vibration. It became.

Applicant has recognized the above point and proposed an inspection apparatus that can solve the imbalance problem of the fan which is the rotating body of the cooling tower through the Republic of Korea Patent Application No. 10-2005-0035951 "Fan Balancing Inspection Device for Cooling Tower". According to such a balancing inspection device, it is possible to adjust the fan balancing based on the measured value provided quantitatively, thereby solving the fan imbalance problem regardless of the skill of the operator, thereby improving the fan quality. I look forward to it.

As shown in Figures 1 and 2, the cooling fan 1 is usually composed of a hub (2) and a blade (3), the blade 3 is composed of a neck (4) and a wing (5). At this time, the balancing inspection apparatus proposed by the applicant through the prior application can check the imbalance of the overall fan (1) combined with the hub (2) and the blade (4), the blade (4) is not connected to the hub (2) It is targeted. Therefore, such a balancing inspection device is excellent in the performance of the overall fan 1, but there is a problem that can not determine the imbalance for the individual blade (4).

In general, the fan 1 needs to be replaced only with blades necessary for long-term maintenance, which causes an unbalance of the fan 1 if it is not replaced with a blade that is balanced for the entire fan. Done. However, the maintenance of the blades is currently performed by replacing blades having the same weight among blades having the same structure, and there is no consideration of the imbalance problem due to the replacement of the blades. It is a cause of vibration and noise.

Accordingly, an object of the present invention is to provide a blade balancing inspection device for a fan of a cooling tower fan of a new type that enables the applicant to check and adjust the imbalance of the blades forming the rotating body of the cooling tower together with the technology proposed by the applicant.

According to a feature of the present invention for achieving the above object, the present invention is a blade balancing inspection device of the fan for the cooling tower for inspecting the imbalance of the blade constituting the rotating fan installed inside the fan stack of the cooling tower, the upper surface A frame placed on the ground to maintain the parallel; A supporting unit coupled to an upper portion of the frame to support the blade, and having a load cell installed so that a load from the blade is applied to the load cell; It includes a computer to receive and display the measured value from the load cell of the supporting unit.

In the blade balancing inspection device of the fan for the cooling tower according to the present invention as described above, the frame has a main rail installed in parallel in the longitudinal direction of the blade, the upper portion of the main rail is formed in the longitudinal direction at least penetrating both sides It has a guiding slot, the supporting unit has a base plate to which the load cell is coupled to the top, the bottom plate of the base plate is coupled to the holding lug is inserted into the guiding slot of the frame to be movable It can be separated from the main rail, it is possible to move the position on the main rail.

In the blade balancing inspection device of the fan for the cooling tower according to the present invention, the load cell of the supporting unit is disposed perpendicular to the main rail so as to support the blade perpendicular to the longitudinal direction of the blade is coupled to the base plate A support bar formed of a round bar may be coupled to an upper portion of the load cell.

According to another feature of the present invention for achieving the above object, in the blade balancing inspection apparatus of the fan for the cooling tower for inspecting the imbalance of the blade constituting the fan is installed inside the fan stack of the cooling tower rotated, A frame having a main rail installed in parallel in the longitudinal direction of the blade at an upper portion thereof, and placed on a ground to maintain the main rail in parallel; A plurality of supporting units which are detachably coupled to an upper portion of the main rail to support the blades, and each of which has a load cell installed so that loads from the blades act on the load cell; It is provided with a computer for receiving and displaying the measurement value from each load cell of the plurality of supporting units.

The blade balancing inspection device of the cooling tower fan according to the present invention further comprises a scale for measuring the distance in the longitudinal direction from the neck of the blade, from each of the load cells installed in the plurality of supporting units from the neck of the blade The distance value to the loading point can be input to the computer.

The blade balancing inspection device of the fan for the cooling tower according to the present invention is coupled to be movable in parallel in the longitudinal direction of the main rail further comprises a positioning unit for fixing the position of the supporting unit, the scale is the By having a linear scale coupled in parallel in the longitudinal direction of the main rail, the positioning unit is moved in combination with the scale slider of the linear scale, and the support is supported from the neck of the blade while the position of the supporting unit is fixed. The distance value to the load operating point of the load cell installed in the unit can be input to the computer.

According to still another aspect of the present invention for achieving the above object, the present invention provides a blade balancing inspection apparatus for a fan for a cooling tower for inspecting the imbalance of the blade constituting the rotating fan installed inside the fan stack of the cooling tower And a main rail having a guiding slot installed in parallel in the longitudinal direction of the blade and formed in the longitudinal direction in the upper portion and having a guiding slot penetrating to both sides thereof, so that the main rail is placed on the ground so as to maintain parallelism with the frame. ; A holding lug is coupled to the bottom surface and has a base plate coupled to the guiding slot of the main rail through the holding lug to move and detach, and to support the blade, and from the blade to a load cell coupled to the base plate. A plurality of supporting units which allow a load of the to be applied; It is provided with a computer for receiving and displaying the measurement value from each load cell of the plurality of supporting units.

The blade balancing inspection device of the fan for the cooling tower according to the present invention is coupled in parallel in the longitudinal direction of the main rail linear scale having a scale guider and a scale slider to measure the distance in the longitudinal direction from the neck of the blade and And a positioning unit coupled to the scale slider of the linear scale and coupled to be movable in parallel in the longitudinal direction of the main rail to fix the position of the supporting unit. In this state, the distance value from the neck of the blade to the load action point of the load cell installed in the supporting unit may be input to the computer.

In the blade balancing inspection device of the fan for the cooling tower according to the present invention, the load cell of the supporting unit is disposed perpendicular to the main rail so as to support the blade perpendicular to the longitudinal direction of the blade is coupled to the base plate The upper part of the load cell may be coupled to a supporting bar formed of a round bar.

In the blade balancing inspection device of the fan for the cooling tower according to the present invention, the linear scale is coupled to the lower portion of the main rail, the positioning unit is coupled to the side of the main rail and the sub-rail, It is coupled to the rail case is coupled to move, the locking slot is formed in parallel with the load cell is formed on the upper, the setting block coupled to the scale slider of the linear scale at the bottom, and sliding parallel to the locking slot of the setting block It may be provided with a setting bar coupled to be inserted into the setting slot is formed to the side of the base plate is coupled to be possible.

Blade balancing inspection apparatus of the cooling tower fan according to the present invention is provided to be able to check the asymmetrical portion with respect to the blade manufactured to form a fan for the cooling tower to correct it. The blade balancing inspection device of the fan for the cooling tower according to the present invention as described above by the inventors of the cooling tower fan balancing inspection device proposed by the present inventors by checking the imbalance of the blade (target product is different) by allowing the operator to adjust Ensure the blades are in optimal balance.

In the application of such a balancing inspection device according to the present invention has been described with an example of a blade for constituting a fan for a cooling tower, in practice, the balancing inspection device according to the present invention is formed in a plate to eliminate the imbalance of a product having a certain length It can be applied to balancing work.

3 is a view for explaining the technical idea of the blade balancing inspection device of the fan for the cooling tower according to the present invention.

Referring to FIG. 3, the balancing inspection device 10 according to the present invention is coupled to an upper portion of the frame 20, which is installed on the ground so that the upper surface thereof is parallel, and the blade 3 to support the blade 3. In addition, the load cell is provided with a supporting unit 40 which allows the load from the blade 3 to act on the load cell, and has a computer that receives and displays the measured value from the load cell of the supporting unit 40.

In this case, although not the object of the present invention, the computer may apply a program that is designed to calculate a result of calculating the moment and an appropriate balance adjustment value for the blade by calculating and processing the measured value input from each load cell and to display the result. Could be.

On the other hand, preferred embodiments of the present invention described below are based on the blade balancing inspection device of the fan according to the present invention having such a basic configuration of the technical configuration and effective measurement of the load cell to effectively solve the imbalance The technical configuration for effectively measuring the distance of the portion where the load is measured by the load cell, that is, the distance from the neck portion 4 of the blade 3 to the corresponding point of each wing portion 5 on which the load is measured, will be described later. Various examples are provided through the preferred embodiment.

The blade balancing device of the fan for a cooling tower according to the present invention improves the point that the blade balancing is adjusted according to the conventional operator's sense, so that the balancing of the blades can be adjusted based on the measured values provided quantitatively to the operator's skill and relationship. It can solve the imbalance problem of the blade without improving the quality of the blade. In addition, since the imbalance problem is improved by accurate data, it is possible to improve the quality control ability, to quickly cope with the maintenance of blade replacement, etc., which may occur later, and to solve the problem of secondary balancing adjustment that occurs after the repair. can do.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, FIGS. 4 to 7B, and like reference numerals denote like elements for performing the same function in FIGS. 1 to 7B. On the other hand, in each of the drawings, such as reinforcing ribs (plates), bolts and screws, holes, washers, nuts for coupling and fixing the main elements; Bearings, stop rings, stop bolts, lubrication structures commonly applied to drive mechanisms; Ordinary technical configurations, such as the connection structure of the cable to build the system has been briefly or omitted, and the illustration of the parts commonly known to those skilled in the art from the description of the basic configuration, operation, and installation of the general instrument. , The parts related to the present invention are shown. In particular, there are parts in which the size ratio between the elements is somewhat different or the sizes between the components coupled to each other are different. However, the differences in representation of the drawings are easily understood by those skilled in the art. A separate description is omitted.

4 to 6 are front, planar and right side views for explaining a blade balancing inspection device for a cooling tower fan according to a preferred embodiment of the present invention, Figures 7a and 7b is for a cooling tower according to a preferred embodiment of the present invention Figures showing the positioning unit in detail in the fan blade balancing inspection device.

3 to 6, the balancing inspection device 10 of the fan for the cooling tower according to an embodiment of the present invention is a frame 20, a plurality of supporting units 40, positioning unit 70, linear scale 80 and a computer.

The frame 20 is provided with a main rail 30 having a guiding slot which is installed parallel to the longitudinal direction of the blade 3 on the upper side and formed in the longitudinal direction on the upper side and penetrates to both sides. The first side bar 22, the second side bar 24, the connecting bar 25 and the bottom bar 26 are provided to be placed on the ground while keeping this parallel.

The plurality of supporting units 40 are configured to support the blade 3 by being coupled to the frame 20 at a predetermined distance, and include a load cell 42, a supporting bar 44, a supporting plate 46, and a base plate. 48 is provided. At this time, the base plate 48 is movable on the main rail 30 by being coupled to the holding lug 52 at the bottom thereof and coupled to the guiding slot of the main rail 30 through the holding lug 52. It can be separated from. In addition, the load cell 42 maintains the accuracy of the measurement by allowing the portion where the load is measured to be separated from the upper surface of the base plate 48, and by installing a stopper 56 under the portion, the load cell 42 due to excessive load. ) To prevent damage. The configuration in which the load of the blade 3 acts on the load cell 42 coupled on the base plate 48 is composed of a supporting bar 44 and a supporting plate 46, such supporting bar 44 and supporting part. The plate 46 allows the load from the blade 3 to be effectively transmitted to the load cell 42. That is, in the present embodiment, the load cell 42 is disposed perpendicular to the main rail 30 so as to support the blade 3 perpendicular to the longitudinal direction of the blade 3, and coupled to the base plate 48. The supporting bar 44 and the supporting plate 46 are coupled to the upper surface of the load cell 42 in parallel with the load cell 42. In addition, the supporting bar 44 is formed as a round bar to receive a load acting on the cross section in the vertical direction of the blade 3 to be measured as a whole, and the supporting plate 46 concentrates on the load cell 42 where the load is measured. Be sure to

The linear scale 80 is coupled in parallel in the longitudinal direction at the bottom of the main rail 30 so that the scale guider 82 and the scale slider 84 can measure the distance in the longitudinal direction from the neck 4 of the blade 3. Has The linear scale 80 generates an electric signal of the movement distance of the scale slider 84 on the scale guider 82 and transmits it to the computer. At this time, the scale slider 84 is coupled to the guiding slot formed on the lower surface of the mail rod 30 by a holding lug 86 to support it to be stably moved.

The positioning unit 70 is coupled to the scale slider 84 of the linear scale 80 and coupled to be movable in parallel in the longitudinal direction of the main rail 30 to fix the position of the supporting unit 40. Such a positioning unit 70 is a load value of the load cell 42 from the neck 4 of the blade 3 (substantially the distance of the supporting unit 40 located in a portion of the blade 3 The distance to the part is input to the computer} from the neck 4 of the blade 3 to the supporting unit 40 with the position of the supporting unit 30 fixed. The distance to the load action point of the load cell 42 installed in) is input to the computer.

As shown in FIGS. 7A and 7B, the positioning unit 70 includes a sub rail 62, a setting block 72, and a setting bar 90 to which the rail case 64 is coupled. The sub rail 62 is coupled to the side of the main rail 30. The setting block 72 is coupled to the rail case 64, which is coupled and moved on the sub rail 62, through a fixing plate 78, and a locking slot 74 formed in parallel with the load cell 42 at the top thereof. It is formed and is coupled to the scale slider 84 of the linear scale 80 through the fixing plate 88 at the bottom. The setting bar 90 is slidably coupled to the locking slot 74 of the setting block 72 to be inserted into and coupled to the setting slot 50 which is formed to the side of the base plate 48 so that the supporting unit 40 is supported. The distance value can be measured with the fixed position of. Such a setting bar 90 is fixed in position by a locking bar 76 coupled to the setting block 72 and the locking holes 73 and 91.

The balancing inspection device 10 of the fan for the cooling tower according to the present invention is made by placing the support unit 40 on the main rail 30 of the frame 20 first. In this case, the supporting unit 40 is installed in an appropriate number with respect to the length of the blade 3 to be inspected, and the supporting unit 40 which supports the neck 4 of the blade 3 {'0' point (origin) load cell ( 42) to be separated from each other by a certain interval so that the measured value can be obtained at various positions. Then, by moving the positioning unit 70, the distance value of each load cell from the origin load cell 42 is measured and input to the computer, and when the blade 3 is arranged for measurement, the measured value is input from the load cell to the computer. Will be displayed.

As described above, the blade balancing device of the fan for the cooling tower according to the preferred embodiment of the present invention has been shown in accordance with the above description and drawings, but this is only for example and within the scope without departing from the spirit of the present invention. It will be appreciated by those skilled in the art that various changes and modifications are possible.

According to the blade balancing device of the fan for a cooling tower according to the present invention, the operator's proficiency is improved by adjusting the blade's balancing adjustment according to the conventional operator's sense so as to adjust the blade's balancing based on the measured value provided quantitatively. Irrespective of the blade imbalance problem can be solved, it is possible to improve the quality of the blade. In addition, since the imbalance problem is improved by accurate data, it is possible to improve the quality control ability, to quickly cope with the maintenance of blade replacement, etc., which may occur later, and to solve the problem of secondary balancing adjustment that occurs after the repair. can do.

Claims (10)

In the blade balancing inspection device of the fan for the cooling tower for inspecting the imbalance of the blade constituting the rotating fan installed inside the fan stack of the cooling tower, A frame placed on the ground so that the top surface is parallel; A support unit coupled to an upper portion of the frame to support the blade, and a load cell installed to allow a load from the blade to act on the load cell; Blade balancing inspection apparatus for a fan for a cooling tower, characterized in that it comprises a computer for receiving the measured value from the load cell of the supporting unit. The method of claim 1, The frame has a main rail installed in parallel in the longitudinal direction of the blade, the upper portion of the main rail has at least one guiding slot formed in the longitudinal direction and penetrates both sides, The supporting unit has a base plate to which the load cell is coupled to the top, and a holding lug is coupled to the bottom of the base plate to be inserted into the guiding slot of the frame so as to be removable from the main rail. And a blade balancing inspection apparatus for a cooling tower fan, characterized in that to move its position on the main rail. The method of claim 2, The load cell of the supporting unit is disposed perpendicular to the main rail so as to support the blade perpendicular to the longitudinal direction of the blade is coupled to the base plate, the support bar formed of a round bar is coupled to the upper portion of the load cell Blade balancing inspection device of the cooling tower fan. In the blade balancing inspection device of the fan for the cooling tower for inspecting the imbalance of the blade constituting the rotating fan installed inside the fan stack of the cooling tower, A frame having a main rail installed in parallel in the longitudinal direction of the blade at an upper portion thereof, and placed on a ground to maintain the main rail in parallel; A plurality of supporting units which are detachably coupled to an upper portion of the main rail to support the blades, and each of which has a load cell installed thereon so that the load from the blade acts on the load cell; Blade balancing inspection apparatus for a cooling fan for a fan, characterized in that it comprises a computer for receiving and displaying the measured value from each load cell of the plurality of supporting units. The method of claim 4, wherein It further comprises a scale for measuring the distance in the longitudinal direction from the neck of the blade, so that the distance value from the neck of the blade to the load operating point of each load cell installed in the plurality of supporting units is input to the computer Blade balancing inspection device for cooling tower fan. The method of claim 5, And a positioning unit coupled to move in parallel in the longitudinal direction of the main rail to fix the position of the supporting unit, wherein the scale has a linear scale coupled in parallel in the longitudinal direction of the main rail. And the positioning unit is moved in combination with the scale slider of the linear scale, and the distance value from the neck of the blade to the load operating point of the load cell installed in the supporting unit is fixed to the computer while the supporting unit is fixed in position. Blade balancing inspection device for the cooling tower fan, characterized in that the input. In the blade balancing inspection device of the fan for the cooling tower for inspecting the imbalance of the blade constituting the rotating fan installed inside the fan stack of the cooling tower, A frame having a main rail installed in parallel in the longitudinal direction of the blade and formed in the longitudinal direction in the upper part and having a guiding slot penetrating at both sides thereof, the frame being installed on the ground so as to keep the main rail in parallel; A holding lug is coupled to the bottom surface and has a base plate coupled to the guiding slot of the main rail through the holding lug to move and disengage the support lug, and from the blade to a load cell coupled on the base plate. A plurality of supporting units which allow a load of the to be applied; Blade balancing inspection apparatus for a cooling fan for a fan, characterized in that it comprises a computer for receiving and displaying the measured value from each load cell of the plurality of supporting units. The method of claim 7, wherein A linear scale coupled in parallel to the longitudinal direction of the main rail and having a scale guider and a scale slider for measuring the distance in the longitudinal direction from the neck of the blade, A positioning unit coupled to the scale slider of the linear scale and coupled to be movable in parallel in the longitudinal direction of the main rail to fix the position of the supporting unit, wherein the position of the supporting unit is fixed In the blade balancing inspection apparatus of the fan for the cooling tower, characterized in that the distance value from the neck of the blade to the load action point of the load cell installed in the supporting unit is input to the computer. The method of claim 8, The load cell of the supporting unit is disposed perpendicular to the main rail so as to support the blade perpendicular to the longitudinal direction of the blade is coupled to the base plate, the support bar formed of a round bar is coupled to the upper portion of the load cell Blade balancing inspection device of the cooling tower fan. The method of claim 9, The linear scale is coupled to a lower portion of the main rail, The positioning unit includes a sub rail coupled to the side of the main rail, A setting block coupled to the rail case coupled to the sub rail, the locking slot being formed parallel to the load cell, the setting block coupled to the scale slider of the linear scale at the bottom thereof; And a setting bar coupled to the locking slot of the setting block so as to be slidable in parallel, the setting bar being inserted into and coupled to the setting slot formed on the side of the base plate.

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