KR101444849B1

KR101444849B1 - Method of manufacturing rotation part of rotary machine

Info

Publication number: KR101444849B1
Application number: KR1020100001318A
Authority: KR
Inventors: 안종기
Original assignee: 삼성테크윈 주식회사
Priority date: 2010-01-07
Filing date: 2010-01-07
Publication date: 2014-09-29
Also published as: KR20110080889A

Abstract

The present invention relates to a method of manufacturing a rotating part of a rotating machine including an impeller having a blade and a shroud coupled to the impeller, the method comprising: (a) preparing the blade and the shroud; (b) (C) irradiating a laser beam while supplying the first filler to a portion of the other surface of the shroud corresponding to a position where the shroud and the blade are in contact with each other, Forming a fillet at a joint portion between the blade and the shroud; and (d) cooling the molten portion.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a rotating part of a rotating machine, and more particularly, to a method of manufacturing a compressor and a pump having a rotating part.

BACKGROUND ART [0002] A compressor or a pump for compressing a fluid or the like generally has a structure of a rotating machine having a rotating part therein.

Generally, such a rotating machine has an impeller as a rotating part, which is configured to transfer rotational kinetic energy to the fluid to raise the pressure of the fluid. To this end, the impeller is provided with a plurality of blades that assist in fluid movement and transfer energy to the fluid.

On the other hand, a shroud is disposed outside the impeller, and the shroud functions as a fluid passage along with the blade.

Generally, as the gap between the blade and the shroud becomes narrower, the efficiency of the compressor increases. Recently, a technique for maximizing the efficiency of the compressor by manufacturing the shroud to the impeller has been proposed.

However, in the case of a technique of manufacturing an impeller by combining shrouds, a process of mutually fixing the blades of the impeller and the shroud is required. For this purpose, a process such as a casting process, a brazing process, an electron beam welding process, In fact.

A main object of the present invention is to provide a method of manufacturing a rotating part of a rotating machine for effectively bonding a shroud to a blade by irradiating a laser beam.

A method of manufacturing a rotating part of a rotating machine including an impeller having a blade and a shroud coupled to the impeller, comprising the steps of: (a) preparing the blade and the shroud; (b) (C) irradiating a laser beam while supplying a first sparkling material to a portion of the other surface of the shroud corresponding to a position where the shroud and the blade are in contact with each other, And forming a fillet at a joint between the blades and the shroud, and (d) cooling the molten portion. The method for manufacturing a rotary part of a rotating machine includes the steps of:

Here, the rotating machine may be a compressor or a pump.

The step (a) may further include forming at least one slope on a part of the blade contacting the one surface of the shroud.

Between the step (b) and the step (c), the step of disposing the second filler material in the space formed by the slope and the shroud may further comprise the step of disposing the second filler material.

Here, the step of disposing the second filler may be a step of disposing the material of the second filler in the space formed by the slope and the shroud by hardening by HIP (Hot Isostatic Pressing) method.

Here, the step of disposing the second filler may be a step of disposing a material powder of the second filler in a space formed by the slope and the shroud.

Here, the second sticky material may include the same material as the first sticky material.

In this case, before the step (c), a groove is formed at a position corresponding to a portion of the other surface of the shroud where the shroud and the blade contact each other, and in the step (c) The laser beam can be irradiated while supplying the fugitive material.

Here, after the step (d), cutting or grinding at least a part of the other surface of the shroud may be further included.

According to the method of manufacturing a rotating portion of a rotating machine according to the present invention, it is possible to minimize the deformation of the joint portion between the blade and the shroud, and to increase the joint strength between the blade and the shroud.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a rotary part of a rotating machine according to an embodiment of the present invention. FIG.
2 is a cross-sectional view of Fig.
FIGS. 3 to 5 are cross-sectional views showing steps of manufacturing the rotary part of the rotary machine according to an embodiment of the present invention.
FIGS. 6 to 9 are cross-sectional views showing steps of manufacturing processes of a rotary part of a rotary machine according to a modification of the embodiment of the present invention.
FIGS. 10 to 12 are cross-sectional views showing steps of the manufacturing process of the rotary part of the rotary machine according to another modification of the embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the present specification and drawings, the same reference numerals are used for constituent elements having substantially the same configuration, and redundant description is omitted.

FIG. 1 is a perspective view showing a schematic view of a rotating part of a rotating machine according to an embodiment of the present invention, and FIG. 2 is a sectional view of FIG. 1. FIGS. 3 to 5 are cross-sectional views showing steps of manufacturing the rotary part of the rotary machine according to an embodiment of the present invention.

The rotating machine according to the present embodiment is a compressor, and the rotating part 100 therein is configured to include an impeller 110 and a shroud 120, as shown in FIGS. The rotating machine according to the present embodiment is a compressor, but the present invention is not limited thereto. That is, the rotating machine according to the present invention is applicable to a device capable of changing the pressure and speed of the fluid by the rotation of the rotating part. For example, the rotating machine according to the present invention may be a pump, a blower, or the like.

The impeller 110 includes an inner core 111, a base portion 112, and a plurality of blades 113.

The inner core 111 is formed to have a cylindrical shape.

The inner core 111 has a mounting hole 111a formed therein and a rotation shaft (not shown) is inserted into the mounting hole 111a during the assembling process. Thus, the inner core 111 rotates the power of the rotary shaft to the impeller 110 And the like.

The base portion 112 is located at the outer periphery of the inner core 111. The surface 112a of the base portion 112 is formed to be a sloped curved surface to form a bottom surface of the fluid passage to smooth the fluid flow. In addition, it is designed to maximize energy transfer to the fluid.

The blades 113 are formed on the surface 112a of the base portion 112 and perform the function of guiding the movement of the fluid while transmitting the kinetic energy of the impeller 110 to the fluid.

On the other hand, the shroud 120 has an umbrella shape that is joined to the upper portion of the blade 113 and has a central portion opened to cover the upper portion of the blade 113.

The shroud 120 forms the top surface of the fluid passage and forms a fluid passage along with the base portion 112 and the blade 113.

The process of transferring energy to the fluid by the rotation of the rotation unit 100 will be described.

When the rotation shaft (not shown) is rotated, the impeller 110 and the shroud 120 are also rotated.

The fluid flows into the inlet port 100a of the rotary part 100 in the direction of the arrow shown in FIG. 2 and then receives the rotational kinetic energy of the rotary part 100 and is discharged to the discharge port 100b under a high pressure. Subsequently, the fluid passes through a diffuser (not shown) to reduce the velocity and increase the pressure to a desired degree, and a description thereof is omitted here.

Hereinafter, a method of manufacturing the rotary unit 100 according to an embodiment of the present invention will be described with reference to FIGS.

First, the operator prepares a blade 113 and a shroud 120 of a metal material (step S101).

The blade 113 in the step S101 is already mounted on the surface 112a of the base part 112 so that the process of joining the blade 113 and the shroud 120 is awaited but the present invention is not limited thereto. That is, the blade 113 according to the present invention may be first attached to the shroud 120, and then mounted to the base portion 122.

Lightweight carbon steel may be used for the blade 113 and the shroud 120, and a non-ferrous metal such as aluminum may be used. That is, the material of the blade 113 and the shroud 120 according to the present invention may be a metal, and there is no particular limitation.

Next, the worker contacts one surface 121 of the shroud 120 with the blade 113 as shown in Fig. 3 (step S102).

4, the worker places a portion of the other surface 122 of the shroud 120 on the opposite side of the portion where the blade 113 and the shroud 120 are in contact with each other, 1 while supplying a filler metal 130 (step S103).

The portion of the shroud 120 on which the laser beam is irradiated is a portion of the other surface 122 of the shroud 120 and specifically the portion of the other surface 122 of the shroud 120 And corresponds to a portion where the blade 113 and the shroud 120 contact each other.

The laser beam used in the present invention can be irradiated by a laser beam generating equipment used in a conventional laser welder.

When the laser beam is irradiated, the melted portion 140 is formed by fusion of the shroud 120 and the first filler 130 by heat, and the melted portion 140 gradually grows to reach the blade 113.

The worker irradiates the laser beam to such a degree that a sufficient fillet can be formed at the joint portion between the blade 113 and the shroud 120 by the molten portion 140 to be generated. That is, the operator designs the required fillet size through calculation of the strength of the fillet, and then irradiates the laser beam so that the fillet grows to the size of the designed fillet.

Here, the first filler material 130 is determined depending on the material of the shroud 120 (base material). For example, low carbon steel, low alloy steel, stainless steel, copper alloy, cast iron, aluminum, Can be used.

5 is a view showing a state in which the fused portion 140 is sufficiently grown to form a fillet F1 of a required size, thereby completing the irradiation of the laser beam. When the melted portion 140 sufficiently grows as shown in FIG. 5, the operator completes the irradiation of the laser beam, and the molten portion 140 is cooled to terminate the bonding operation (Step S104).

According to this embodiment, the joining operation is terminated at step S104, and there is no subsequent machining operation for the joining site, but the present invention is not limited thereto. That is, if necessary, the operator may cut or grind at least a portion of the other surface 122 of the shroud 120 to which the joining operation has been completed to adjust the thickness of the shroud 120, The flatness of the other surface 122 may be improved.

According to the manufacturing method of the rotating part 100 of the rotating machine as described above, the laser beam is irradiated to the other surface 122 of the shroud 120 and the first filler material 130 is melted to form the fillet F1 It is possible to manufacture the rotary part 100 in which the processing deformation is small and the bonding strength between the blade 113 and the shroud 120 is excellent.

Hereinafter, with reference to FIGS. 6 to 9, a description will be given of a method for manufacturing a rotating portion of a rotating machine according to a modified example of the present embodiment, but focusing on matters different from the embodiments of the present invention.

FIGS. 6 to 9 are cross-sectional views showing steps of manufacturing processes of a rotary part of a rotary machine according to a modification of the embodiment of the present invention.

First, the operator prepares the blade 213 and the shroud 220 of a metal material (step S201).

The operator forms a slope 213a at an edge portion of the end portion of the blade 213 contacting one surface 221 of the shroud 220 while preparing the blade 213. [

The description of the material of the blade 213 and the shroud 220 is the same as the description of the material of the blade 113 and the shroud 120 of the present embodiment, and the description thereof is omitted here.

Next, the worker contacts one surface 221 of the shroud 220 with the blade 213 as shown in Fig. 6 (step S202).

Next, the worker places the second sparkling material 235 in the space formed by the slope 213a and the shroud 220 in contact with each other (step S203).

Here, the method of disposing the second fiducials 235 is as follows.

First, the material powder of the second fliers 235 is put into a mold having a predetermined shape, placed in a HIP (Hot Isostatic Pressing) equipment and hardened by a high-temperature isostatic pressing method to prepare a mold-shaped second folloWing material 235 (Step S203-1), the prepared second fusing material 235 is placed in a space where the slope 213a and the shroud 220 are opposed to each other (step S203-2).

Here, the description of the material of the second fiducials 235 is the same as the description of the material of the first fiducials 130 of this embodiment, and further explanation will be omitted.

According to this modification, after the material powder of the second sparger 235 is put into a mold having a predetermined shape, a shape is formed by a HIP (Hot Isostatic Pressing) method, and the slope 213a and the shroud 220 But the present invention is not limited thereto. That is, according to the present invention, the second sparkling material 235 may be disposed in a space in which the slurry 213a and the shroud 220 are opposed to each other by putting the material powder of the second sparkling material 235, It is similar to the method of injecting the filler at the time of brazing.

8, a worker inserts a part of the other surface 222 of the shroud 220 in a portion of the other surface 222 of the shroud 220 opposite to the portion where the blade 213 and the shroud 220 are in contact with each other, 1 while supplying the sparger 230 (step S204).

A part of the second surface 222 of the shroud 220 is irradiated with a laser beam while the first fleece material 230 is being applied and concretely the portion of the surface of the second surface 221 of the shroud 220 And the shroud 220 are in contact with each other.

The shape and material of the first sparkling material 230 are the same as those described for the shape and material of the first sparkling material 130 of the present embodiment, and further explanation will be omitted.

When the laser beam is irradiated, a melted portion 240 in which the shroud 220 and the first filler material 230 are fused is generated by the heat, and the melted portion 240 gradually grows so that the blade 213 and the disposed second sparger 235 < / RTI > When the fused portion 240 reaches the second fiducials 235, the second fiducials 235 are melted, and the fillets are easily formed.

The operator performs irradiation of the laser beam to such an extent that the fillet can be sufficiently formed at the junction of the blade 213 and the shroud 220 by the melted portion 240 to be generated. That is, the operator designs the required fillet size through calculation of the strength of the fillet, and then irradiates the laser beam so that the fillet grows to the size of the designed fillet.

Fig. 9 is a view showing a state in which the fused portion 240 is grown sufficiently large enough to form a fillet F2 of a required size, thereby completing the irradiation of the laser beam. When the melted portion 240 is sufficiently grown as shown in FIG. 9, the operator finishes the irradiation of the laser beam, and the molten portion 240 is cooled to terminate the bonding operation (Step S205).

According to one modification of the method for manufacturing the rotary part 100 of the rotating machine as described above, the slope 213a is formed on a part of the blade 213 contacting the one surface 221 of the shroud 220, A laser beam is irradiated to the other surface 222 of the shroud 220 and the first sponge material 230 is melted by supplying the laser beam to the other surface 222 of the shroud 220 By forming the fillet F2, it is possible to manufacture the rotary part 100 with less work deformation and excellent bonding strength between the blade 113 and the shroud 120. Particularly, according to this modification, the presence of the second sparingly soluble substance 235 makes it possible to more easily form the fillet F2 having a desired strength.

The configuration, operation, and effect of the manufacturing method of the rotary part of the rotary machine according to the modification of the embodiment of the present invention other than the constructions, operations, and effects as described above are the same as those of the rotary part manufacturing method Operation, and effect, and thus will not be described in this description.

Hereinafter, with reference to FIGS. 10 to 12, a method of manufacturing a rotating portion of a rotating machine according to another modified example of the present embodiment will be described, focusing on matters different from the embodiments of the present invention.

FIGS. 10 to 12 are cross-sectional views illustrating steps of the manufacturing process of the rotary part of the rotary machine according to another modification of the embodiment of the present invention.

First, the operator prepares a blade 313 and a shroud 320 of a metal material (step S301). The worker inserts the groove 322a into the portion of the other surface 322 of the shroud 320 located on the opposite side of the portion where the blade 313 and the shroud 320 are in contact while preparing the shroud 320, . The portion where the grooves 322a are formed is a portion of the other surface 322 of the shroud 320. Specifically, the portion of the other surface 322 of the shroud 320, Is a portion corresponding to a portion where the wood 320 contacts.

The description of the materials of the blade 313 and the shroud 320 is the same as the description of the material of the blade 113 and the shroud 120 of the present embodiment, and the description thereof is omitted here.

Next, the worker contacts one surface 321 of the shroud 320 with the blade 313 as shown in Fig. 10 (step S302).

Then, the operator irradiates the laser beam while supplying the first sparkling material 330 to the groove 322a as shown in Fig. 11 (step S303).

When the laser beam is irradiated, the melted portion 340 is formed by fusion of the shroud 320 and the first filler 330 by heat, and the melted portion 340 gradually grows to reach the blade 313. According to another modification of the present embodiment, the presence of the groove 322a allows the molten portion 340 to reach the blade 313 more quickly as the molten portion 340 grows stably. That is, the grooved portion 322a has a function of preventing the first sparkling material 330 from flowing, and further, by reducing the thickness of the portion of the shroud 320 to which the laser beam is irradiated, ) Is propagated.

The worker irradiates the laser beam to such a degree that the fillet can be sufficiently formed at the joining portion of the blade 313 and the shroud 320 by the molten portion 340 to be generated. That is, the operator designs the required fillet size through calculation of the strength of the fillet, and then irradiates the laser beam so that the fillet grows to the size of the designed fillet.

Fig. 12 is a view showing a state in which the fused portion 340 has grown sufficiently large enough to form the fillet F3, thereby completing the irradiation of the laser beam. When the melted portion 340 sufficiently grows as shown in FIG. 12, the operator finishes the irradiation of the laser beam, and the molten portion 340 is cooled to terminate the bonding operation (Step S304).

According to the manufacturing method of the rotary part 100 of the rotating machine as described above, the grooves 322a are formed on the other surface 322 of the shroud 320 and the laser beam is irradiated to the formed grooves 322a, The fillet F3 is formed by melting and injecting the filler F3 into the fillet F3 so that the machining deformation is reduced and the rotary portion 100 having excellent bonding strength between the blade 313 and the shroud 320 can be manufactured. In particular, according to another modification, the presence of the second sponge 235 makes it possible to form the fillet F3 more stably and promptly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

The present invention can be used for manufacturing a rotating machine having a rotating part such as a compressor, a pump, and the like.

100: rotating part 110: impeller
111: inner core 112: base portion
113, 213, 313: Blades 120, 220, 320: Shuraud
130, 230, 330: first scooping material 140, 240, 340:
213a: Slope 235: Secondary use material
322a: grooves F1, F2, F3: fillet

Claims

A method of manufacturing a rotating part of a rotating machine including an impeller having a blade and a shroud coupled to the impeller,
(a) preparing the blade and the shroud;
(b) contacting the blade to one surface of the shroud;
(c) forming a molten portion by irradiating a laser beam while supplying a first filler to a portion of the other surface of the shroud corresponding to a position where the shroud and the blade are in contact with each other, Forming a fillet in the joining portion of the wood; And
(d) cooling the molten portion,
Wherein the step (a) further comprises forming at least one slope on a part of a portion of the blade contacting one surface of the shroud.

delete

The method according to claim 1,
Further comprising the step of disposing a second sparger in the space formed by the slope and the shroud between the step (b) and the step (c).

delete

The method according to claim 1,
Wherein, before the step (c), a groove is formed at a position corresponding to a portion of the other surface of the shroud where the shroud contacts the blade,
And (c) irradiating the laser beam while supplying the first filler to the groove.

Claim 9 has been abandoned due to the setting registration fee.

The method according to claim 1,
Further comprising the step of cutting or grinding at least a part of the other surface of the shroud after the step (d).