WO2019139199A1

WO2019139199A1 - Compressor

Info

Publication number: WO2019139199A1
Application number: PCT/KR2018/001516
Authority: WO
Inventors: 김영대
Original assignee: 한화파워시스템 주식회사
Priority date: 2018-01-11
Filing date: 2018-02-05
Publication date: 2019-07-18
Also published as: CN111587323B; KR20190085594A; CN111587323A; KR102474772B1

Abstract

The present invention relates to a compressor, and relates to a compressor which allows an expanded gas for cooling to flow into a motor through an impeller and a blade of a labyrinth seal disposed at an entrance of the motor. An embodiment of the present invention comprises: an impeller which pressurizes a gas while rotating; a rotor coupled to the impeller and disposed in a motor housing, so as to transmit rotation power to the impeller; and a labyrinth seal disposed between the impeller and the rotor, so as to restrain the gas pressurized by the impeller from flowing into the motor housing, wherein the labyrinth seal comprises a single blade.

Description

compressor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, and more particularly, to a compressor for allowing inflation gas for cooling to flow into a motor through a blade of a labyrinth seal provided at an inlet of an impeller and a motor.

The gas turbine engine can combust the fuel to rotate the turbine. The combustion of the fuel can be performed by a combustor, which requires a large amount of air to be combusted.

A compressor may be used to supply sufficient air to the combustor. The compressor compresses and supplies a large amount of air to the combustor, and the combustor can combust the fuel using the supplied air.

The motor may include a stator and a rotor. Heat can be generated as the rotor rotates relative to the stator. In order to remove heat between the stator and the rotor, the motor must have separate cooling means, which may increase the overall size and weight of the compressor.

Therefore, the emergence of the invention for removing the heat between the stator and the rotor without requiring a separate cooling means is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a compressor for allowing inflation gas for cooling to flow into a motor through a blade of a labyrinth seal provided at an inlet of an impeller and a motor.

The objects of the present invention are not limited to the above-mentioned problems, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a compressor including: an impeller that pressurizes a gas by rotation; a rotor coupled to the impeller and disposed inside the motor housing to transmit rotational power to the impeller; And a labyrinth seal disposed between the impeller and the rotor to restrict the flow of gas pressurized by the impeller into the motor, wherein the labyrinth seal includes a single blade.

A bearing disk is provided at one end of the rotor, and the labyrinth seal is provided between the impeller and the bearing disk.

The rotor has a shielding ring formed at one end thereof to form a ring-shaped slit with the labyrinth seal. Gas passing through the ring-shaped slit expands and flows into the motor housing in a cooled state.

The diameter of the shielding ring is smaller than the diameter of the rotor.

A carbon ring is provided on the inner side of the blade in contact with the shielding ring.

An elastic ring having an elastic force of a predetermined magnitude or more is provided on the inner side of the blade in contact with the shield ring.

The elastic ring has a shape of a disk and is deformed by the pressurized gas to form the ring-shaped slit.

The motor housing and the rotor are connected by an air foil bearing.

The details of other embodiments are included in the detailed description and drawings.

According to the data processing apparatus and method of the present invention as described above, the inflation gas for cooling is introduced into the motor through the impeller and the blade of the labyrinth seal provided at the inlet of the motor, It provides the advantage of eliminating the heat of the motor without having to do so.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is an exploded perspective view of a compressor according to an embodiment of the present invention.

2 is a perspective view of a compressor according to an embodiment of the present invention.

3 is a perspective view of a labyrinth seal according to an embodiment of the present invention.

4 is a cross-sectional view of a labyrinth seal according to an embodiment of the present invention.

5 is a cross-sectional view of a compressor according to an embodiment of the present invention.

6 is a view showing that a slit is formed between a labyrinth seal and a shield ring according to an embodiment of the present invention.

FIG. 7 is a view showing that the gas according to the embodiment of the present invention flows into the interior of the motor housing. FIG.

8 is a view showing gas passing through a slit according to an embodiment of the present invention.

9 is a perspective view of a labyrinth seal according to another embodiment of the present invention.

FIG. 10 is a view showing the gas moving by the labyrinth seal shown in FIG.

11 is a perspective view of a labyrinth seal according to another embodiment of the present invention.

12 is a view showing the movement of the gas by the labyrinth seal shown in Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

FIG. 1 is an exploded perspective view of a compressor according to an embodiment of the present invention, and FIG. 2 is a perspective view of a compressor according to an embodiment of the present invention.

1 and 2, a compressor 10 according to an embodiment of the present invention includes a motor housing 100, a rotor 200, a bearing disk 300, a shield ring 400, a support disk 500, And includes an impeller 700 and a spiral case 800.

The motor housing 100 may accommodate a stator (not shown) and the rotor 200 to provide a rotating space of the rotor 200. A stator may be fixedly coupled to the inside of the motor housing 100.

The rotor 200 can be rotated by a change in the magnetic force of the stator. The rotor 200 has a circular column shape and a permanent magnet may be provided therein. As the stator provides a varying magnetic force, the rotor 200 becomes rotatable.

A coupling rod 210 for coupling with the impeller 700 may be provided at the distal end of the rotor 200. The rotor 200 is coupled to the impeller 700 through the coupling rod 210 and can transmit the rotational power generated in the motor housing 100 to the impeller 700.

A bearing disk 300 may be provided at one end of the rotor 200. Specifically, the bearing disk 300 may be coupled to the coupling rod 210 at one end of the rotor 200 to which the impeller 700 is coupled. The bearing disk 300 can rotate integrally with the rotor 200.

The bearing disk 300 serves to reduce the friction between the rotor 200 and the motor housing 100. The compressor 10 according to the embodiment of the present invention can connect the rotor 200 and the motor housing 100 with an air foil bearing. The bearing disk 300 may be one side of the airfoil bearing. The motor housing 100 is provided with a disc receiving space (not shown) for receiving the bearing disc 300. The bearing disc 300 can rotate without directly contacting the disc receiving space.

The shield ring 400 is disposed in the through hole H (see FIG. 4) of the labyrinth seal 600 so as to restrict the pressurized gas generated at the impeller 700 side from entering the interior of the motor housing 100 Role. The shield ring 400 may be provided at one end of the rotor 200. Specifically, the shield ring 400 is coupled to the bearing disc 300 and rotates together with the bearing disc 300.

The support disk 500 is fixedly coupled to the motor housing 100 to support one end of the rotor 200. The rotor 200 is supported by the support disk 500 and can rotate relative to the motor housing 100. The support disk 500 may include a labyrinth seal 600. The labyrinth seal 600 is provided between the impeller 700 and the rotor 200 and functions to restrict gas that is pressurized by the impeller 700 from flowing into the interior of the motor housing 100.

The shield ring 400 coupled to the rotor 200 may be rotated inside the labyrinth seal 600. As the shield ring 400 rotates close to the labyrinth seal 600, the introduction of the pressurized gas into the motor housing 100 can be restricted.

The labyrinth seal 600 according to an embodiment of the present invention may include a single blade 610. A part of the gas pressurized by the impeller 700 can pass between the labyrinth seal 600 and the shielding ring 400 because it is composed of only one blade 610. Gas penetrating between the labyrinth seal 600 and the shielding ring 400 can be introduced into the motor housing 100 and used for cooling the interior of the motor housing 100.

The impeller 700 serves to pressurize the gas by rotation. The impeller 700 can be rotated by receiving the rotational power of the rotor 200. The impeller 700 is coupled to the coupling rod 210 of the rotor 200 and receives rotational power from the rotor 200. The impeller 700 may be coupled to the coupling rod 210 by a nut 220. To this end, the coupling rod 210 may be provided with a thread for coupling with the nut 220.

The spiral case 800 plays a role of providing a movement path of the gas. The spiral case 800 may include a gas inlet 810, a gas outlet 820, and a gas transfer tube 830. The gas inlet 810 provides a flow path for the gas and the gas outlet 820 can provide a discharge path for the gas.

The gas introduced through the gas inlet 810 can be pressurized by the impeller 700. The pressurized gas can be delivered through the gas transfer tube 830 and discharged through the gas outlet 820.

FIG. 3 is a perspective view of a labyrinth seal according to an embodiment of the present invention, and FIG. 4 is a sectional view of a labyrinth seal according to an embodiment of the present invention.

Labyrinth seal 600 has the form of a disk and can be combined with shield ring 400 to restrict gas movement. The labyrinth seal 600 may be attached to one side of the support disk 500. The rotor 200 can be supported on the support disk 500 via the labyrinth seal 600.

The labyrinth seal 600 according to an embodiment of the present invention may include a single blade 610. A certain amount of the gas generated from the impeller 700 can flow into the interior of the motor housing 100 through the space between the labyrinth seal 600 and the shielding ring 400 because there is only one blade 610.

The labyrinth seal 600 may have a through hole H for penetrating the coupling rod 210 and the shield ring 400. One side of the blade 610 adjacent to the through hole H may be reduced in thickness toward the through hole H. [ The end of the blade 610 forming the edge of the through hole H may have a relatively small thickness.

4 shows that the entire left side surface of the labyrinth seal 600 is flat and inclined surfaces are included on the right side surface. One surface of the labyrinth seal 600 having a flat surface as a whole is referred to as a first surface and the other surface of the labyrinth seal 600 including an inclined surface is referred to as a second surface.

The first surface may be the surface facing the impeller 700 and the second surface may be the surface facing the motor housing 100. The gas pressurized by the impeller 700 can move from the first surface to the second surface.

FIG. 5 is a cross-sectional view of a compressor according to an embodiment of the present invention, FIG. 6 is a view showing a slit formed between a labyrinth seal and a shield ring according to an embodiment of the present invention, FIG. In which the gas is introduced into the interior of the motor housing.

5 and 7, the rotor 200 is accommodated in the motor housing 100 and can be rotated by a change in the magnetic force of the stator 900.

The permanent magnet 230 may be provided inside the rotor 200. As the stator 900 forms a changing magnetic force, the rotor 200 can rotate. The impeller 700 can rotate together with the rotor 200 to pressurize the gas.

The gas introduced through the gas inlet port 810 is pressurized by the rotational force of the impeller 700 and the pressurized gas can be moved along the gas transfer pipe 830 and then discharged through the gas outlet port 820.

An airfoil bearing 110 may be provided in the inner space of the motor housing 100. The rotor 200 can be rotated without being in direct contact with the inner surface of the motor housing 100.

Referring to FIG. 6, the labyrinth seal 600 and the shielding ring 400 may form a ring-shaped slit SL.

The width of the slit SL is the distance between the end of the blade 610 of the labyrinth seal 600 and the surface of the shield ring 400 and may be relatively small in size.

A part of the gas pressurized by the impeller 700 can be introduced into the interior of the motor housing 100 through the slit SL. Since the width of the slit SL is small, most of the pressurized gas is discharged through the gas outlet 820, but some pressurized gas can be introduced into the interior of the motor housing 100.

FIG. 7 shows that some of the gas pressurized by the impeller 700 flows into the interior of the motor housing 100. The gas introduced into the motor housing 100 can be used for cooling the stator 900 and the rotor 200.

A bearing disk 300 is provided at one end of the rotor 200 and a labyrinth seal 600 may be provided between the impeller 700 and the bearing disk 300. Thus, the gas that has passed through the labyrinth seal 600 can be introduced into the motor housing 100 through the bearing disk 300. At this time, the bearing disk 300 can be cooled by the gas.

The diameter of the shield ring 400 may be smaller than the diameter of the bearing disk 300. As a result, the area of the entire surface of the bearing disk 300 exposed to the gas passing through the slit SL increases, and the cooling efficiency of the bearing disk 300 can be improved.

Referring to FIG. 8, some of the gas pressurized by the impeller 700 can pass through the slit SL.

As described above, the size of the slit SL can be relatively small. Further, the gas generated from the impeller 700 is pressurized and can have a relatively high pressure. Thus, the pressurized gas can pass through the slit SL at a high pressure. The gas that has passed through the slit SL can expand in the space SP formed between the labyrinth seal 600 and the bearing disk 300. [ The gas passing through the ring-shaped slit SL can be expanded and introduced into the interior of the motor housing 100 in a cooled state.

FIG. 9 is a perspective view of a labyrinth seal according to another embodiment of the present invention, and FIG. 10 is a view showing gas moving by the labyrinth seal shown in FIG.

Referring to Figs. 9 and 10, the labyrinth seal 601 may include a blade 611 and a carbon ring 621.

The carbon ring 621 is provided on the inner side of the blade 611 and can contact the shield ring 400. The carbon ring 621 may be formed along the edge of the through hole H of the labyrinth seal 601.

The carbon ring 621 may be in contact with or slightly spaced from the shield ring 400. The blocking ratio between the space on the side of the impeller 700 and the inside of the motor housing 100 may increase as the carbon ring 621 contacts or is slightly spaced from the shield ring 400. [

Vibration may occur in the motor housing 100 as the rotor 200 rotates. The contact between the carbon ring 621 and the shield ring 400 can be temporarily released when vibration occurs. That is, the distance between the carbon ring 621 and the shield ring 400 increases, and the slit SL can be formed.

The gas pressurized by the impeller 700 can be introduced into the interior of the motor housing 100 through the slit SL between the carbon ring 621 and the shield ring 400. Since the slit SL formed between the carbon ring 621 and the shield ring 400 is generated by vibration, the slit SL can be formed to have a very small width. As a result, the expansion rate of the pressurized gas increases, and the temperature reduction efficiency of the gas can be improved.

FIG. 11 is a perspective view of a labyrinth seal according to another embodiment of the present invention, and FIG. 12 is a view showing gas moving by the labyrinth seal shown in FIG.

Referring to Figures 11 and 12, the labyrinth seal 602 may include a blade 612 and an elastic ring 622.

The elastic ring 622 may be provided on the inner side of the blade 612 to contact the shield ring 400. The elastic ring 622 has an elastic force of a predetermined magnitude or more and may be formed along the edge of the through hole H of the labyrinth seal 602.

The elastic ring 622 can be in contact with the shield ring 400. The space on the side of the impeller 700 and the inside of the motor housing 100 can be completely shut off as the elastic ring 622 contacts the shield ring 400. [

The elastic ring 622 may have the form of a disc. The elastic ring 622 can be deformed by the pressurized gas. The ring-shaped slit SL can be formed between the elastic ring 622 and the shielding ring 400 as the elastic ring 622 is deformed. The pressurized gas passing through the slit SL can be inflated and introduced into the interior of the motor housing 100 in a state where the temperature is reduced.

Since the slit SL formed between the elastic ring 622 and the shield ring 400 is formed by the force of the pressurized gas, the width thereof can be made very small. As a result, the expansion rate of the pressurized gas increases and the temperature reduction efficiency of the gas can be improved.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims

An impeller which pressurizes the gas by rotation;

A rotor coupled to the impeller and disposed inside the motor housing to transmit rotational power to the impeller;

And a labyrinth seal disposed between the impeller and the rotor to restrict gas that is pressurized by the impeller from entering the interior of the motor housing,

Wherein the labyrinth seal comprises a single blade.
The method according to claim 1,

Wherein a bearing disk is provided at one end of the rotor, and the labyrinth seal is provided between the impeller and the bearing disk.
3. The method of claim 2,

Wherein one end of the rotor is provided with a shield ring for forming a ring-shaped slit between the rotor and the labyrinth seal,

And the gas passing through the ring-shaped slit expands and flows into the interior of the motor housing in a cooled state.
The method of claim 3,

Wherein the diameter of the shielding ring is smaller than the diameter of the bearing disk.
The method of claim 3,

And a carbon ring is provided inside the blade in contact with the shield ring.
The method of claim 3,

And an elastic ring having an elastic force of a predetermined magnitude or more is provided inside the blade contacting the shield ring.
The method according to claim 6,

Wherein said elastic ring has the form of a disk and is deformed by said pressurized gas to form said ring-shaped slit.
The method according to claim 1,

Wherein the motor housing and the rotor are connected by an air foil bearing.
9. The method of claim 8,

Wherein some of the pressurized gas passes through a through hole formed in the labyrinth seal and flows between the motor housing formed by the airfoil bearing and the rotor.
The method according to claim 1,

The labyrinth seal has a first plane that is generally planar; And

And a second surface including an inclined surface,

Wherein the first surface is formed toward the impeller and the second surface is formed toward the motor housing.