阅读说明：本技术 压缩机 (Compressor with a compressor housing having a plurality of compressor blades ) 是由 金荣大 于 2018-02-05 设计创作，主要内容包括：本发明涉及一种压缩机,涉及一种通过叶轮和配备于马达的入口的迷宫式密封件(labyrinth seal)的叶片使得用于冷却的膨胀气体流入马达的压缩机。根据本发明的实施例的包括：叶轮,借由旋转而加压气体；转子,结合于所述叶轮,并配备于马达壳体的内部,从而将旋转动力传递至所述叶轮；迷宫式密封件,配备于所述叶轮和所述转子之间,限制借由所述叶轮被加压的气体流入至所述马达壳体的内部,其中,所述迷宫式密封件包括单个叶片。(The present invention relates to a compressor, and more particularly, to a compressor in which an expanded gas for cooling is caused to flow into a motor through an impeller and a vane of a labyrinth seal (labyrinths seal) provided at an inlet of the motor. The method comprises the following steps: an impeller for pressurizing gas by rotation; a rotor coupled to the impeller and provided inside the motor housing to transmit rotational power to the impeller; a labyrinth seal provided between the impeller and the rotor, restricting a flow of gas pressurized by the impeller into an interior of the motor housing, wherein the labyrinth seal includes a single blade.)

1. A compressor, comprising:

an impeller for pressurizing gas by rotation;

a rotor coupled to the impeller and provided inside the motor housing to transmit rotational power to the impeller;

a labyrinth seal provided between the impeller and the rotor, the labyrinth seal restricting a flow of gas pressurized by the impeller into an interior of the motor housing,

wherein the labyrinth seal includes a single blade.

2. The compressor of claim 1,

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 compressor of claim 2,

a seal ring forming an annular slit between the labyrinth seal and the rotor is provided at one end of the rotor,

the air passing through the annular slit expands and flows into the interior of the motor housing in a cooled state.

4. The compressor of claim 3,

the seal ring is formed to have a diameter smaller than that of the bearing disk.

5. The compressor of claim 3,

a carbon ring is provided on the inner side of the blade that meets the seal ring.

6. The compressor of claim 3,

an elastic ring having an elastic force of a predetermined magnitude or more is provided inside the blade contacting the seal ring.

7. The compressor of claim 6,

the elastic ring has a disk shape and is deformed by the pressurized gas to form the annular slit.

8. The compressor of claim 1,

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

9. The compressor of claim 8,

a part of the pressurized gas flows into between the motor housing and the rotor formed by the air foil bearing through a through hole formed in the labyrinth seal.

10. The compressor of claim 1,

the labyrinth seal includes:

a first face, the entirety of which is planar; and

the second surface comprises an inclined surface,

wherein the first face is formed to face the impeller, and the second face is formed to face the motor housing.

Technical Field

The present invention relates to a compressor, and more particularly, to a compressor in which an expanded gas for cooling flows into a motor through an impeller and a vane of a labyrinth seal (labyrinth seal) provided at an inlet of the motor.

Background

Gas turbine engines may combust fuel to rotate a turbine. Combustion of the fuel may be performed by means of a burner, for which a large amount of air is required.

To provide sufficient air to the combustor, a compressor may be utilized. The compressor may compress a large amount of air to be provided to the combustor, and the combustor may combust fuel using the provided air.

The motor may include a stator and a rotor. The rotor may rotate relative to the stator to generate heat. In order to remove heat between the stator and the rotor, the motor needs to be equipped with a separate cooling unit, whereby the size and weight of the entire compressor may increase.

Therefore, an invention has been developed which is capable of removing heat between the stator and the rotor without providing a separate cooling unit.

Disclosure of Invention

Technical subject

The technical problem to be solved by the present invention is to provide a compressor in which an expanded gas for cooling is caused to flow into a motor by an impeller and a vane of a labyrinth seal provided at an inlet of the motor.

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

Technical scheme

In order to achieve the above object, a compressor according to the present invention includes: an impeller for pressurizing gas by rotation; a rotor coupled to the impeller and provided inside the motor housing to transmit rotational power to the impeller; a labyrinth seal provided between the impeller and the rotor, restricting a 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.

A seal ring forming an annular slit between the labyrinth seal and the rotor is provided at one end of the rotor, and air passing through the annular slit expands and flows into the inside of the motor housing in a cooled state.

The seal ring is formed to have a diameter smaller than that of the rotor.

A carbon ring is provided on the inner side of the blade that meets the seal ring.

An elastic ring having an elastic force of a predetermined magnitude or more is provided inside the blade contacting the seal ring.

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

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

Specific details of other embodiments are set forth in the detailed description and the drawings.

Technical effects

According to the data processing apparatus and method of the present invention as described above, the following advantages are provided: the expanded gas for cooling flows into the motor through the impeller and the blades of the labyrinth provided at the inlet of the motor, so that the heat of the motor can be removed without providing a separate cooling unit.

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

Drawings

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

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

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

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

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

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

Fig. 7 is a diagram illustrating a state in which gas flows into the interior of the motor housing according to the embodiment of the present invention.

Fig. 8 is a view showing a state where gas passes through a slit according to an embodiment of the present invention.

FIG. 9 is a perspective view of a labyrinth seal in accordance with another embodiment of the invention.

Fig. 10 is a view showing a state in which gas is moved by the labyrinth seal shown in fig. 9.

FIG. 11 is a perspective view of a labyrinth seal in accordance with yet another embodiment of the invention.

Fig. 12 is a view showing a state in which gas is moved by the labyrinth seal shown in fig. 11.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages, features and methods of accomplishing the same may be understood more clearly by reference to the following detailed description of embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, which may be implemented in various forms different from each other, and the embodiments are provided only for the purpose of making the disclosure of the present invention complete and informing a person having basic knowledge in the technical field to which the present invention belongs of the scope of the present invention, which is defined only by the scope of the claims. Throughout the specification, the same reference numerals denote the same constituent elements.

Unless otherwise defined, all terms (including technical and scientific terms) used in the specification may be used in a meaning commonly understood by one having ordinary skill in the art to which this invention belongs. Also, terms commonly used in dictionaries should not be interpreted as being idealized or overly formal unless expressly so defined herein.

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.

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

The motor housing 100 may house a stator (not shown) and the rotor 200 and provide a rotation space of the rotor 200. Inside the motor housing 100, the stator may be fixedly coupled.

The rotor 200 may rotate according to a magnetic force variation of the stator. The rotor 200 may have a cylindrical shape and be internally equipped with permanent magnets. As the stator provides a varying magnetic force, the rotor 200 may rotate.

A coupling rod 210 for coupling with the impeller 700 may be provided at the end of the rotor 200. The rotor 200 may be coupled to the impeller 700 by the coupling rod 210, and may transmit rotational power generated inside the motor housing 100 to the impeller 700.

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

The bearing disk 300 may function to buffer friction between the rotor 200 and the motor housing 100. The compressor 10 according to an embodiment of the present invention may connect the rotor 200 and the motor housing 100 using an air foil bearing (air foil bearing). The bearing disk 300 may be one side of an air foil bearing. The motor housing 100 is provided with a disk receiving space (not shown) that receives the bearing disk 300, but the bearing disk 300 may rotate without directly contacting the disk receiving space.

The seal ring 400 is disposed in a through hole H (see fig. 4) of the labyrinth seal 600, and functions to restrict the pressurized gas generated on the impeller 700 side from flowing into the motor housing 100. The seal ring 400 may be provided at one end of the rotor 200. Specifically, the seal ring 400 may be coupled to the bearing disk 300 to rotate together with the bearing disk 300.

The support plate 500 is fixedly coupled to the motor housing 100 to support one end of the rotor 200. The rotor 200 may be supported by the support plate 500 to rotate with respect 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, thereby functioning to restrict the gas pressurized by the impeller 700 from flowing into the interior of the motor housing 100.

The seal ring 400 coupled to the rotor 200 may rotate inside the labyrinth seal 600. As the seal ring 400 rotates in a state of being close to the labyrinth seal 600, the inflow of the pressurized gas to the motor housing 100 may be restricted.

Labyrinth seal 600 according to embodiments of the present invention may include a single blade 610. Since only one blade 610 is provided, a part of the gas pressurized by the impeller 700 may pass through between the labyrinth seal 600 and the seal ring 400. The gas passing through between the labyrinth seal 600 and the seal ring 400 can flow into the motor housing 100 and be used for cooling the motor housing 100.

The impeller 700 functions to pressurize gas by rotation. The impeller 700 may receive the rotational power of the rotor 200 to rotate. The impeller 700 may be coupled to the coupling rod 210 of the rotor 200 to receive rotational power from the rotor 200. The impeller 700 may be coupled to the coupling rod 210 by means of the nut 220. For this, a screw thread for coupling with the nut 220 may be formed at the coupling rod 210.

The spiral case 800 functions to provide a moving path of gas. The spiral case 800 may include a gas inflow port 810, a gas exhaust port 820, and a gas transport pipe 830. The gas inflow port 810 may provide an inflow path of gas, and the gas exhaust port 820 may provide an exhaust path of gas.

The gas flowing in through the gas inlet 810 may be pressurized by the impeller 700. The pressurized gas may be transferred through the gas transfer pipe 830 and may be discharged through the gas discharge port 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 the labyrinth seal according to an embodiment of the present invention.

The labyrinth seal 600 may have a disk form and may be combined with the sealing ring 400 so that the movement of gas may be restricted. The labyrinth seal 600 may be attached to one face of the support disk 500. The rotor 200 may be supported by the support disk 500 via a labyrinth seal 600.

Labyrinth seal 600 according to embodiments of the present invention may include a single blade 610. Since the vane 610 is one, a certain amount of gas generated in the impeller 700 may flow into the inside of the motor housing 100 through between the labyrinth seal 600 and the seal ring 400.

The labyrinth seal 600 may include a through hole H for passing the coupling rod 210 and the seal ring 400 therethrough. The side of the blade 610 adjacent to the through-hole H may be reduced in thickness toward the through-hole. The thickness of the tip of the blade 610 forming the edge of the through-hole H may be relatively small.

Fig. 4 illustrates the following situation: the left side of the labyrinth seal 600 is entirely planar, while the right side includes an inclined surface. Hereinafter, one side surface of the labyrinth seal 600, which is flat as a whole, is referred to as a first surface, and the other side surface of the labyrinth seal 600 including the inclined surface is referred to as a second surface.

The first face may be a face facing the impeller 700, and the second face may be a face facing the motor housing 100. The gas pressurized by the impeller 700 may move from the first face toward the second face.

Fig. 5 is a sectional view of a compressor according to an embodiment of the present invention, fig. 6 is a view illustrating a state where a slit is formed between a labyrinth seal and a seal ring according to an embodiment of the present invention, and fig. 7 is a view illustrating a state where gas flows into the inside of a motor housing according to an embodiment of the present invention.

Referring to fig. 5 and 7, the rotor 200 may be housed inside the motor case 100 and may be rotated by a change in magnetic force of the stator 900.

The rotor 200 may be provided with a permanent magnet 230 at the inside thereof. As the stator 900 generates a varying magnetic force, the rotor 200 may rotate. The impeller 700 may rotate together with the rotor 200 to pressurize gas.

The gas flowing in through the gas inlet 810 may be pressurized by the rotational force of the impeller 700, and the pressurized gas may move along the transport pipe 830 and may be discharged through the gas outlet 820.

An air foil bearing 110 may be provided in the inner space of the motor housing 100. The rotor 200 may rotate in a state of not directly contacting the inner surface of the motor housing 100.

Referring to fig. 6, the labyrinth seal 600 and the sealing ring 400 may form an annular slit SL.

The width of the slit SL is a distance between the tip of the vane 610 of the labyrinth seal 600 and the surface of the seal ring 400, and the size thereof may be relatively small.

A part of the gas pressurized by the impeller 700 may flow into the inside of the motor housing 100 through the slit SL. Since the width of the slits SL is small, most of the pressurized gas may be discharged through the gas discharge port 820, but a part of the pressurized gas may flow into the inside of the motor housing 100.

Fig. 7 illustrates a state in which a part of the gas pressurized by the impeller 700 flows into the inside of the motor housing 100. The gas flowing into the motor housing 100 can be used for cooling the stator 900 and the rotor 200.

A bearing disk 300 may be 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 passing through the labyrinth seal 600 may flow into the motor housing 100 through the bearing disk 300. At this time, the bearing disk 300 may be cooled by gas.

The diameter of the seal ring 400 may be formed to be small compared to the diameter of the bearing disk 300. Thereby, an area exposed to the gas passing through the slits SL in the entire area of the bearing disk 300 increases, and thus the cooling efficiency of the bearing disk 300 can be improved.

Fig. 8 is a view showing a state where gas passes through a slit according to an embodiment of the present invention.

Referring to fig. 8, a portion of the gas pressurized by the impeller 700 may pass through the slits SL.

As described above, the size of the slit SL may be relatively small. Also, the gas generated at the impeller 700 is pressurized gas, and thus may have a relatively large pressure. Thereby, the pressurized gas can pass through the slit SL at a high pressure. The gas passing through the slits SL may expand in a space SP formed between the labyrinth seal 600 and the bearing disk 300. The gas passing through the annular slit SL expands to flow into the inside 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 illustrating a state in which gas is moved by the labyrinth seal shown in fig. 9.

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

A carbon ring 621 may be provided at the inner side of the blade 611 to interface with the sealing ring 400. The carbon ring 621 may be formed along an edge of the through hole H of the labyrinth seal 601.

The carbon rings 621 may be contiguous with the seal ring 400 or may be finely spaced. As the carbon ring 621 is in contact with or finely spaced from the sealing ring 400, a sealing rate between the space on the impeller 700 side and the inside of the motor housing 100 may be increased.

As the rotor 200 rotates, vibration may be generated at the motor housing 100. In the case of vibration, the contact between the carbon ring 621 and the seal ring 400 may be temporarily released. That is, the separation distance between the carbon ring 621 and the sealing ring 400 is increased, so that the slit SL may be formed.

The gas pressurized by the impeller 700 may flow into the inside of the motor housing 100 through the slit SL between the carbon ring 621 and the sealing ring 400. Since the slit SL formed between the carbon ring 621 and the sealing ring 400 is generated by vibration, the width thereof can be formed very small. Thereby, the expansion rate of the pressurized gas can be increased, and the temperature lowering efficiency of the gas can be improved.

Fig. 11 is a perspective view of a labyrinth seal according to still another embodiment of the present invention, and fig. 12 is a view illustrating a state in which gas is moved by the labyrinth seal shown in fig. 11.

Referring to fig. 11 and 12, labyrinth seal 602 may include vanes 612 and an elastomeric ring 622.

An elastomeric ring 622 may be provided on the inside of the vane 612 to interface with the seal ring 400. The elastic ring 622 is a ring having 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.

Elastomeric ring 622 may be attached to seal ring 400. With the elastic ring 622 attached to the seal ring 400, the space on the impeller 700 side and the inside of the motor housing 100 can be completely blocked.

The elastic ring 622 may have a disk shape. The elastic ring 622 may be deformed by the pressurized gas. As the elastic ring 622 is deformed, an annular slit SL may be formed between the elastic ring 622 and the sealing ring 400. The pressurized gas passing through the slits SL can expand to flow into the interior of the motor housing 100 in a state of a reduced temperature.

Since the slit SL formed between the elastic ring 622 and the sealing ring 400 is a slit formed by the force of the pressurized gas, the width thereof is formed very small. Thereby, the expansion rate of the pressurized gas can be increased, and the temperature lowering efficiency of the gas can be improved.

Although the embodiments of the present invention have been described with reference to the drawings, those having ordinary skill in the art to which the present invention pertains will appreciate that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.