Impeller balancing adjustment device

Abstract

An impeller balancing adjustment device of the present invention comprises: a first-stage driving shaft (130) which rotates by means of a driving means; a second-stage driving shaft (140) which is integrally connected to the first-stage driving shaft (130) so as to have the same axial center line thereas, is provided so as to have a smaller diameter than that of the first-stage driving shaft (130), and rotates in conjunction with the first-stage driving shaft (130); an impeller fixing portion (160) which is integrally connected, between the first-stage driving shaft (130) and the second-stage driving shaft (140), to the first-stage driving shaft (130) so as to have the same axial center line thereas, and is shaped into a circular disk having a greater diameter compared to the first-stage driving shaft (130); a third-stage driving shaft (150) which is integrally connected to the second-stage driving shaft (140) so as to have the same axial center line thereas, is provided so as to have a smaller diameter than that of the second-stage driving shaft (140), and rotates in conjunction with the second-stage driving shaft (140); an impeller (110) which is fitted and coupled onto the second-stage driving shaft (140) by having a through-hole formed in the center thereof, and is coupled in a state where the outer surface of one side thereof is in close contact with the outer surface of the impeller fixing portion (160); and an impeller cap (120) which has one side thereof fixed to the impeller (110) by means of a pin (P), and is firmly coupled and fixed to the third-stage driving shaft (150) by being provided with a O-ring (R), formed from a rubber material and having an elastic force, between the inner surface of a through-hole thereof and the outer surface of the third-stage driving shaft (150).

Description

Impeller balancing adjustment device

[0001] The present invention relates to an impeller, and more particularly, to an impeller balancing adjustment device for simultaneously balancing an impeller and an impeller cap.

[0002] In general, a rotating body such as an impeller may experience imbalance due to the inherent mass, such as the difference in weight of each part, or may experience imbalance due to combined mechanical elements.

[0003] Additionally, such a rotating body can become unbalanced due to mistakes when coupled to a shaft that transmits power, and even if the static balance is correct, a thrust may be generated during rotation, resulting in a dynamic imbalance.

[0004] Such an unbalanced rotor causes vibration and becomes a hindrance to the normal operation of the pump equipped with such a rotor.

[0005] Accordingly, a balancing device is used to eliminate the imbalance between the rotating body and the shaft. This balancing device is a device that fixes the end of the shaft to which the rotating body is coupled so that it can rotate and balance the rotating body and the shaft by rotating them at a predetermined rotation speed. The configuration of an impeller balancing shaft that corrects mechanical vibration or rotational imbalance by using this balancing device is known.

[0006] Figure 1 is a cross-sectional view of a conventional balancing device.

[0007] As shown, the main body shaft (40) of the impeller balancing shaft is positioned while maintaining a gap in the inner diameter of the impeller boss (10), and a fixed key (50) inserted in a longitudinal fixed key groove (43) of the main body shaft (40) to match the key groove (10a) formed in the inner diameter of the impeller boss (10) is positioned.

[0008] In addition, a hollow tapered sleeve (60) corresponding to the length of the impeller boss (10) is arranged in a gap formed by the inner diameter of the impeller boss (10) where the fixed key (50) is arranged and the main body shaft (40), and a configuration is known in which fixed nuts (71, 71', 72, 72') are arranged in pairs at both ends in the longitudinal direction of the tapered sleeve and are screw-connected to the main body shaft (40) of the impeller balancing shaft.

[0009] Rotating bodies such as the above impeller may have imbalances due to inherent mass differences in each part, or may have imbalances due to mistakes in the assembly of mechanical elements. Since the cap attached to the impeller is installed manually after balancing the shaft and boss, the balancing state of the impeller becomes unbalanced, and there was a problem that the impeller cap had to be balanced separately.

[0010] [Prior Art Literature]

[0011] [Patent Document]

[0012] Utility Model Registration No. 20-0169624 (announced on March 2, 2000)

[0013] The present invention is intended to solve the above problems and to provide an impeller balancing adjustment device for simultaneously balancing an impeller and an impeller cap.

[0014] The impeller balancing adjustment device of the present invention is characterized by including a first stage drive shaft that rotates by a driving means, a second stage drive shaft that is integrally connected with the first stage drive shaft and has the same axis center line as the first stage drive shaft, has a smaller diameter than the first stage drive shaft, and rotates in conjunction with the first stage drive shaft, an impeller fixing part that is integrally connected between the first stage drive shaft and the second stage drive shaft and has the same axis center line as the first stage drive shaft and has a larger diameter than the first stage drive shaft in the shape of a disk, and a third stage drive shaft that is integrally connected with the second stage drive shaft and has the same axis center line as the second stage drive shaft, has a smaller diameter than the second stage drive shaft, and rotates in conjunction with the second stage drive shaft.

[0015] In addition, it includes an impeller having a through hole formed in the center, fitted and coupled to a two-stage drive shaft, and coupled in a state where one outer surface is in close contact with the outer surface of the impeller fixing part; and an O-ring made of elastic rubber is provided between the inner surface of the through hole of the impeller and the outer surface of the two-stage drive shaft, so that it is firmly coupled and fixed to the two-stage drive shaft.

[0016] In addition, it is characterized by including an impeller cap having a cylindrical structure with a through hole formed inside, which is fitted and coupled to a three-stage drive shaft, one side of which is fixed to an impeller with a pin, and an O-ring made of elastic rubber material is provided between the inner surface of the through hole and the outer surface of the three-stage drive shaft, thereby being firmly coupled and fixed to the three-stage drive shaft.

[0017] It is characterized in that a groove (R) to which an O-ring (R) is fastened is formed on the outer surface of the above-mentioned two-stage drive shaft (140) and three-stage drive shaft (150).

[0018] The impeller (110) and impeller cap (120) connected by the above pin (P) are characterized in that they are connected at the pin (P) position even when connected to the rotating body after the balance is adjusted.

[0019] The present invention has a remarkable effect of preventing the balancing efficiency from being halved when the impeller cap is balanced separately and then combined with the impeller by balancing the impeller and the impeller cap simultaneously.

[0020] Figure 1 is a cross-sectional view of a conventional balancing device.

[0021] Figure 2 is a cross-sectional view of the impeller balancing adjustment device of the present invention.

[0022] Figure 3 is a photograph showing the operating status of the balancing adjustment device.

[0023] Preferred embodiments of the present invention are described in detail with reference to the accompanying drawings. It should be noted that the sizes of components, line thicknesses, and the like depicted in the drawings used to describe the present invention may be somewhat exaggerated for ease of understanding.

[0024] Furthermore, the terms used in the description of the present invention are defined in consideration of their functions within the present invention and may vary depending on the user, operator, intent, custom, etc. Therefore, the definitions of these terms should be based on the overall content of this specification.

[0025] And in this application, terms such as 'include', 'have', etc. should be understood to indicate the presence of a specific number, step, operation, component, part or combination thereof described in the specification, and not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0026] In addition, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the present embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform a person having ordinary skill in the art of the scope of the invention.

[0027] Therefore, the present invention can have various modifications and various forms, and the embodiments (aspects) (or examples) are described in detail in the specification. However, this is not intended to limit the present invention to a specific disclosed form, and it should be understood that it includes all modifications, equivalents, or substitutes included in the technical spirit of the present invention, and the singular expression used in this specification includes plural expressions unless the context clearly indicates otherwise.

[0028] However, in describing the present invention, specific descriptions of well-known or publicly known functions or configurations will be omitted in order to clarify the gist of the present invention.

[0029] Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

[0030] Figure 2 is a cross-sectional view of the impeller balancing adjustment device of the present invention, and Figure 3 is a photograph showing the operating state of the balancing adjustment device.

[0031] As illustrated, the impeller balancing adjustment device (100) of the present invention includes an impeller (110), an impeller cap (120), a first-stage drive shaft (130), a second-stage drive shaft (140), a third-stage drive shaft (150), and an impeller fixing part (160).

[0032] The first stage drive shaft (130) rotates by a driving means not shown in the figure.

[0033] The second stage drive shaft (140) is integrally connected with the first stage drive shaft (130) and has the same axis center line, has a smaller diameter than the first stage drive shaft (130), and rotates in conjunction with the first stage drive shaft (130).

[0034] The impeller fixing part (160) is integrally connected between the first-stage drive shaft (130) and the second-stage drive shaft (140) with the same axis center line as the first-stage drive shaft (130), and is provided in the shape of a disc with a larger diameter and a constant thickness than the first-stage drive shaft (130).

[0035] The three-stage drive shaft (150) is integrally connected with the two-stage drive shaft (140) and has the same axis center line, has a smaller diameter than the two-stage drive shaft (140), and rotates in conjunction with the two-stage drive shaft (140).

[0036] The impeller (110) has a through hole formed in the center and is fitted and coupled to the two-stage drive shaft (140), and one outer surface is coupled in close contact with the outer surface of the impeller fixing part (160).

[0037] In addition, an elastic rubber O-ring (R) is provided on one side and the other side between the inner surface of the through hole of the impeller (110) and the outer surface of the two-stage drive shaft (140), or multiple O-rings are provided over the entire section between the inner surface of the through hole of the impeller (110) and the outer surface of the two-stage drive shaft (140), so that the impeller (110) is firmly connected and fixed to the two-stage drive shaft (140) without being subjected to a load that may cause deformation.

[0038] A groove (R) to which an O-ring (R) is fastened is formed on the outer surface of the above-mentioned two-stage drive shaft (140) and three-stage drive shaft (150).

[0039] The impeller cap (120) has a cylindrical structure with a through hole formed inside, and is fitted and connected to the three-stage drive shaft (150).

[0040] In addition, one side of the impeller cap (120) is fixed to the impeller (110) with a pin (P), and an O-ring (R) made of elastic rubber is provided between the inner surface of the through hole of the impeller cap (120) and the outer surface of the three-stage drive shaft (150), so that the impeller cap (120) is firmly coupled and fixed to the three-stage drive shaft (150) without being subjected to a load that may cause deformation.

[0041] The impeller (110) and impeller cap (120) connected by the above pin (P) are reconnected at the pin (P) position where they were connected to the balancing adjustment device when connected to a rotating body such as a compressor or pump after the balancing adjustment.

[0042] The present invention, as described above, has the effect of preventing the balancing efficiency from being halved when the impeller (110) and the impeller cap (120) rotate simultaneously and are balanced when the first stage drive shaft (130) rotates, thereby eliminating the need to separately balance the impeller cap (120), and then combining the impeller cap (120) with the impeller (110) after balancing it separately.

Claims

1. A single-stage drive shaft (130) that rotates by a driving means; A second stage drive shaft (140) that is integrally connected with the first stage drive shaft (130) and has a smaller diameter than the first stage drive shaft (130) and rotates in conjunction with the first stage drive shaft (130). An impeller fixing part (160) is connected integrally between the first stage drive shaft (130) and the second stage drive shaft (140) with the same axis center line as the first stage drive shaft (130) and is provided in the shape of a disc with a larger diameter than the first stage drive shaft (130). An impeller balancing adjustment device characterized by including a three-stage drive shaft (150) that is integrally connected with a two-stage drive shaft (140) and has a diameter smaller than that of the two-stage drive shaft (140) and rotates in conjunction with the two-stage drive shaft (140).

2. In claim 1, An impeller balancing adjustment device characterized by including an impeller (110) having a through hole formed in the center, fitted and coupled to a two-stage drive shaft (140), and having one outer surface joined in a state of close contact with the outer surface of an impeller fixing part (160).

3. In claim 2, An impeller balancing adjustment device characterized in that an O-ring (R) made of elastic rubber is provided between the inner surface of the through hole of the impeller (110) and the outer surface of the two-stage drive shaft (140), and is firmly connected and fixed to the two-stage drive shaft (140).

4. In claim 3, It has a cylindrical structure with a through hole formed inside, and is fitted and connected to a three-stage drive shaft (150). An impeller balancing adjustment device characterized in that it includes an impeller cap (120) that is fixed to an impeller (110) on one side with a pin (P), and has an elastic rubber O-ring (R) provided between the inner surface of the through hole and the outer surface of the three-stage drive shaft (150), so as to be firmly connected and fixed to the three-stage drive shaft (150).

5. In claim 1, An impeller balancing adjustment device characterized in that a groove (R) to which an O-ring (R) is fastened is formed on the outer surface of a second-stage drive shaft (140) and a third-stage drive shaft (150).

6. In claim 4, An impeller balancing adjustment device characterized in that the impeller (110) and the impeller cap (120) connected by the pin (P) are connected at the pin (P) position even when connected to the rotating body after the balance is adjusted.

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