WO2013180538A1

WO2013180538A1 - Turbo compression system

Info

Publication number: WO2013180538A1
Application number: PCT/KR2013/004851
Authority: WO
Inventors: 이헌석
Original assignee: 한국터보기계 주식회사
Priority date: 2012-05-31
Filing date: 2013-05-31
Publication date: 2013-12-05
Also published as: US20150110606A1; EP2857692A1; CN104364530A; JP2015518113A; KR101360799B1; EP2857692A4; KR20130134656A

Abstract

Disclosed is a turbo compression system comprising: a first impeller which has a first intake port and a first discharge port, and which compresses a fluid flowing into the first intake port by using a rotational motion such that the fluid is discharged to the first discharge port; a second impeller which has a second intake port and a second discharge port, and which compresses a fluid flowing into the second intake port by using such that the fluid is discharged to the second discharge port; a second discharge channel which is provided to be connected to the second discharge port; a first discharge channel which allows the second discharge channel to communicate with the first discharge port; a first valve which is provided in the first discharge channel, and which controls the flow of the fluid; a second inlet channel which is connected to the second intake port, and which selectively allows the fluid to flow into the second impeller; a second valve provided at the end of the second inlet channel; and a compression channel which has one end connected to the first valve and the other end connected to the second inlet channel, wherein the provided turbo compression system has a plurality of design points, that is, characteristics of both a two-stage turbo compression system and a one-stage double-suction turbo compression system, and can selectively convert the design points.

Description

[Correction 13.08.2013 by Rule 26] 보 Turbo compression system

The present invention relates to a turbocompression system as a whole, and more particularly, has a plurality of design points, that is, a characteristic of a two-stage turbocompression system and a characteristic of a two-stage two-stage turbocompression system, which can be selectively switched. A turbo compression system.

This section provides background information related to the present disclosure which is not necessarily prior art.

The turbo compression system is a system that sucks and compresses a gas such as a fluid or a refrigerant gas by a rotary driving of an impeller included in a turbo compressor, and discharges the gas, and the discharge pressure is relatively high.

Conventional turbo compression system is a method of implementing a high speed rotation by using a speed increase gear in a constant speed motor, but in recent years, a direct-type high speed rotation technology that is directly connected to the motor by the development of bearings and inverter (Invertor) technology has been applied.

On the other hand, in relation to the turbo compression system, Korean Patent No. 0273433 discloses a turbo compression system having two compression devices to improve the cooling efficiency of the motor by activating the flow of refrigerant flowing into the motor, registered in Korea Patent 0304562 discloses a turbocompression system which facilitates the processing and assembly of radial support means.

However, conventional turbocompression systems are typically designed to exhibit the highest efficiency at one design point, i.e. one particular design flow rate and one particular design pressure, and have high compression ratio characteristics at that design point. do.

Therefore, in the region where the compression ratio is low, the compression ratio is low compared to the design point, and thus the compression efficiency is lowered than that of the two-stage single-stage turbocompressor having two compression apparatuses, thereby reducing the maximum flow rate at low pressure.

The present invention is to solve the above problems of the conventional turbo compression system, a turbo compression system capable of selectively switching between the design point of the high-pressure two-stage turbo compression system and the low-pressure one-stage two-stage turbo compression system For the purpose of providing.

According to an embodiment of the present invention, a turbo compression system includes: a first impeller having a first suction port and a first discharge port, and compressing a fluid flowing into the first suction port by a rotational motion to discharge the fluid to the first discharge port; A second impeller having a second suction port and a second discharge port, for compressing the fluid flowing into the second suction port by a rotational motion and discharging the fluid to the second discharge port; A second discharge passage connected to the second discharge port; A first discharge passage communicating the second discharge passage with the first discharge port; A first valve provided in the first discharge passage and controlling a flow of the fluid; A second inflow passage connected to the second suction port and selectively introducing fluid into the second impeller; A second valve provided at an end of the second inflow passage; And a compression passage having one end connected to the first valve and having the other end connected to the second inflow passage.

Here, the motor having a rotating shaft on one side and the other side, respectively, the first impeller and the second impeller is connected to the rotating shaft, respectively; the motor may further include.

The first valve may include a two-stage compression path through which the fluid introduced into the first suction port is compressed and discharged through the first impeller and the second impeller, and discharged from the first discharge port and the second discharge port. The fluid may be provided to selectively control the one-stage compression path to be discharged by laminating.

In addition, when the fluid is controlled to flow along the two-stage compression path, the second valve is blocked, and when the fluid is controlled to flow along the first-stage compression path, the second valve may be provided to open.

In addition, the first valve may be selectively opened and closed to control to operate as one of a two-stage turbo compression system and a one-stage turbo compression system.

In addition, the first impeller and the second impeller may be provided to have the same diameter.

In addition, a first motor connected to the first impeller to rotate the first impeller; And a second motor provided separately from the first motor and connected to the second impeller to rotate the second impeller.

The first valve may include a three-way valve configured to communicate any one of the second discharge passage and the compression passage with the first discharge passage, and the second valve may be formed of the compression passage and the second valve from the second suction port. 2 is provided farther than the laminated position of the inflow passage, it may be provided as a solenoid valve for opening and closing the second inflow passage.

The first valve may include a three-way valve configured to communicate any one of the second discharge passage and the compression passage with the first discharge passage, and the second valve may be formed by combining the compression passage and the second inflow passage. It may be provided in a position, and optionally provided with a three-way valve for communicating the compression passage and the second inflow passage.

On the other hand, the turbo compression system according to another embodiment of the present invention, a first impeller having a first suction port and the first discharge port, the first impeller for compressing the fluid flowing into the first suction port by the rotary motion to discharge to the first discharge port ; A first motor for rotationally driving the first impeller; A second impeller having a second suction port and a second discharge port, for compressing the fluid flowing into the second suction port by a rotational motion and discharging the fluid to the second discharge port; A second motor provided separately from the first motor and driving the second impeller to rotate; A first discharge passage connected to the first discharge port; A second discharge passage connected to the second discharge port separately from the first discharge passage; A first valve provided at an end of the first discharge passage; A first compression passage communicating the first valve with the second discharge passage; A second compression passage communicating with the first discharge passage via the first valve; A second valve provided at an end of the second compression passage; A second inflow passage communicating the second valve with the second suction port; And a suction passage connected to the second valve separately from the second suction passage and selectively in communication with the second suction passage.

The first valve may include a two-stage compression path through which the fluid introduced into the first suction port is compressed and discharged through the first impeller and the second impeller sequentially, and discharged from the first discharge port and the second discharge port. The fluid may be provided to selectively control the one-stage compression path to be discharged by laminating.

In addition, when the fluid is controlled to flow along the two-stage compression path, the second valve is controlled such that the second inflow path communicates with the second compression path, and controls the fluid to flow along the first compression path. If so, the second valve may be controlled such that the second inflow passage communicates with the suction passage.

In addition, the first valve and the second valve may be provided as a three-way valve.

According to the turbo compression system according to an embodiment of the present invention, compared to the conventional two-stage turbo compression system of the same capacity may have the advantage that the maximum flow rate that can be operated at low pressure is increased.

In addition, according to the turbo compression system according to an embodiment of the present invention, when the minimum flow rate is required at low pressure by operating to the design point of the high pressure two-stage turbo compression system to increase the operating range for the minimum flow rate at low pressure It may have an advantage.

1 is a schematic configuration diagram of a turbo compression system according to a first embodiment of the present invention;

FIG. 2 is a view showing a driving state at a design point D2 corresponding to the high pressure two-stage turbocompression system in FIG. 1;

FIG. 3 is a view showing a driving state at a design point D1 corresponding to the low pressure one-stage two-stage turbocompression system in FIG. 1;

4 is a graph showing the pressure (P) and flow rate (Q) characteristics of the design point (D2) of the high-pressure two-stage turbo compression system and the design point (D1) of the first-stage two-stage turbocompression system in FIG.

5 is a schematic structural diagram of a turbo compression system according to a second embodiment of the present invention;

6 is a view showing a driving state at a design point D2 corresponding to the high pressure two-stage turbocompression system in FIG. 2 and FIG.

FIG. 7 is a view showing a driving state at the design point D1 corresponding to the low pressure one-stage two-stage turbocompression system in FIG. 3.

Hereinafter, various embodiments of the turbocompression system according to the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, the inventor may appropriately define the concept of terms in order to best describe his invention, the terms or words used in the present specification and claims are to be interpreted limited to the ordinary or dictionary meanings It should not be interpreted as meanings and concepts corresponding to the technical spirit of the present invention.

In addition, various embodiments to be described below are merely described as examples for the practice of the present invention, and the scope of the present invention is not limited to the embodiments to be described, but within the spirit and scope of the present invention. Various changes, modifications or substitutions will be made by those skilled in the art and such embodiments are to be understood as falling within the scope of the invention.

First, a turbo compression system according to a first embodiment of the present invention will be described.

1 is a schematic configuration diagram of a turbo compression system according to a first embodiment of the present invention, FIG. 2 is a view showing a driving state at a design point D2 corresponding to a high pressure two-stage turbo compression system in FIG. 1; FIG. 3 is a view showing a driving state at a design point D1 corresponding to the low pressure one-stage two-stage turbocompression system in FIG. 1.

1 to 3, the turbo compression system 100 according to the present example includes a first discharge passage 121 connected to a second discharge passage 170 including a first valve 130 at a discharge port side. A second impeller having a first impeller 120 and a second valve 150 formed therein, and a second inflow passage 151 for selectively introducing fluid and a discharge port side connected to the second discharge passage 170; 160, a motor 110 driving the first impeller 120 and the second impeller 160, one end of which is connected to the first valve 130 and the other end of the second valve 150. It is configured to include a compression passage 141 coupled to the second inflow passage 151 downstream of the.

Here, the first valve 130 is provided as a three-way valve, the second valve 150 is preferably provided as a solenoid valve.

The first valve 130 and the second valve 150 may drive the design point D2 of the high pressure two-stage turbo compression system or the design point D1 of the low pressure one-stage two-stage turbo compression system. It is configured to be on / off control for selection. Details will be described later with reference to FIG. 4.

By controlling the flow path of suction and discharge fluid by appropriate operation of the said 1st valve 130 and the said 2nd valve 150 by this structure, the 2nd stage which discharges the 1st stage suction suction of a low pressure or the maximum flow volume of a high pressure is performed. It achieves simultaneous compression and two stages of compression to discharge the minimum flow rate of low pressure.

Specifically, the two-stage turbo compression system 100 according to the present embodiment, as shown in FIG. 2, shuts off the second valve 150 and opens the first valve 130 to the first discharge passage 121 and the first valve. 2, in the case of controlling to connect the compression flow path 141, the pressure P and the flow rate Q of the design point D2 It is driven to discharge the fluid.

In this case, after the fluid introduced through the first inflow passage i is compressed by the first impeller 120, the first discharge passage 121, the first valve 130, the compression passage 141, and By being introduced into the second impeller 160 via the second inflow passage 151, the second stage is compressed and discharged.

Unlike this, as shown in FIG. 3, the second valve 150 is opened, and the first valve 130 is connected to the first discharge passage 121 and the second discharge passage 170, and the compression passage 141 is connected to the first valve 130. In the case of controlling the shielding, the side side is driven to have the pressure P and the air volume Q of the low-pressure single stage intake turbo compressor design point D1 for compressing and discharging the suction fluid in one stage in the low pressure operation region. .

In this case, the fluid introduced through the first inflow passage i is compressed by the first impeller 120 and then discharged into the second discharge passage 170, and the fluid introduced through the second valve 150. Is introduced into the second impeller 160 and compressed in one stage, and then is discharged through the second discharge passage 170.

In addition, when the minimum amount of air flow is required in the low-pressure driving region, the two-stage compression is performed at the two-stage turbocompressor design point D2. Lower flow rates extend the minimum flow range.

Specifically, referring to FIG. 4.

FIG. 4 is a graph showing the characteristics of pressure P and flow rate Q at the design point D2 of the high pressure two-stage turbo compression system and the design point D1 of the one-stage two-stage turbocompression system.

Referring to FIG. 4, the turbocompression system 100 according to the present example is driven at a design point D2 of a two-stage turbocompression system having a high flow rate or a low pressure minimum flow rate by selectively controlling the opening of the flow path of the valves. It can be seen that the drive at the design point D1 of the first stage double suction turbocompression system can be performed simultaneously.

That is, the turbo compression system 100 according to the present example has the characteristics of the two-stage turbo compression system and the one-stage turbo compression system simultaneously according to the driving method, thereby extending the minimum flow rate operation range at low pressure.

In this example, it is preferable that the first impeller 120 and the second impeller 160 driven by one motor have the same diameter so as to control the same compression ratio at the same rotation speed.

However, in the case of driving using different motors, the impellers may have the same diameter or may have different diameters as necessary. This is because, when using different motors, the desired compression ratio can be controlled by individually controlling the motors.

Hereinafter, a turbo compression system according to a second embodiment of the present invention will be described.

5 is a schematic configuration diagram of a turbo compression system according to a second embodiment of the present invention, FIG. 6 is a view showing a driving state at a design point D2 corresponding to a high pressure two-stage turbo compression system in FIG. FIG. 7 is a view showing a driving state at the design point D1 corresponding to the low pressure one-stage two-stage turbocompression system in FIG. 3.

5 to 7, the turbo compression system 200 according to the present example includes a first discharge passage 232, a first valve 230, and a first compression passage 231 on the discharge port side. The first impeller 220 connected to the second discharge passage 270, the first motor 210 driving the first impeller 220, and the second discharge passage 270 at the first valve 230. ) And a second valve 240 for selectively shielding the second compression passage 241 branching from the outside and the suction passage 242 for suction of the fluid compressed from the outside is provided on the inlet side by the second inflow passage 243. Coupled to the discharge port side is characterized in that it comprises a second impeller 260 to which the second discharge passage 270 is connected, and a second motor 250 for driving the second impeller 260.

Here, it is preferable that both the first valve 230 and the second valve 150 are provided as three-way valves.

The turbo compression system 200 of the above-described configuration allows the first valve 230 to be connected to the second compression passage 241, and the second valve 240 is connected to the fluid through the suction passage 242. Two-stage turbo compression that performs high pressure two stage compression or low pressure minimum flow compression by blocking suction and controlling the fluid flowing through the first valve 230 to flow into the second impeller 260. It is driven to have a pressure P and a flow rate Q at the design point D2 of the system.

In this case, the fluid introduced through the first inflow passage 221 is compressed in the first stage through the first impeller 220, and then compressed in the second impeller 260 via the second compression passage 241. It is discharged through the second discharge passage 270.

Unlike this, the first valve 230 is opened toward the first compression passage 231, and the second valve 240 blocks the first valve 230 and the suction passage 242 and the second inflow passage. In the case of controlling the inflow of fluid from the outside by communicating 243, the compressed fluid having the pressure P and the flow rate Q of the first stage double suction turbocompressor design point D1 operating in the low pressure operating region is discharged. To work.

In this case, the fluid introduced through the first inflow passage 221 is first compressed through the first impeller 220 and then discharged into the second discharge passage 270 through the first compression passage 231. The fluid introduced through the valve 240 is first compressed by the second impeller 260 and then discharged through the second discharge passage 270.

Claims

A first impeller having a first suction port and a first discharge port, compressing the fluid flowing into the first suction port by a rotational motion and discharging the fluid to the first discharge port;

A second impeller having a second suction port and a second discharge port, for compressing the fluid flowing into the second suction port by a rotational motion and discharging the fluid to the second discharge port;

A second discharge passage connected to the second discharge port;

A first discharge passage communicating the second discharge passage with the first discharge port;

A first valve provided in the first discharge passage and controlling a flow of the fluid;

A second inflow passage connected to the second suction port and selectively introducing fluid into the second impeller;

A second valve provided at an end of the second inflow passage; And

And a compression passage having one end connected to the first valve and the other end connected to the second inflow passage.
The method according to claim 1,

And a motor having a rotating shaft on one side and the other side, respectively, wherein the first impeller and the second impeller are respectively connected to the rotating shaft and rotated.
The method according to claim 1,

The first valve may include a two-stage compression path through which the fluid introduced into the first suction port is compressed and discharged sequentially passing through the first impeller and the second impeller, and the fluid discharged from the first discharge port and the second discharge port. Turbo compression system, characterized in that for selectively controlling the one-stage compression path is laminated and discharged.
The method according to claim 3,

The second valve is closed when the fluid is controlled to flow along the two-stage compression path, and the second valve is opened when the fluid is controlled to flow along the first stage compression path. .
The method according to claim 3,

The first valve is selectively opened and closed to control to operate as any one of a two-stage turbo compression system and a first-stage turbo compression system.
The method according to claim 1,

And the first impeller and the second impeller have the same diameter.
The method according to claim 1,

A first motor connected to the first impeller to rotate the first impeller; And

And a second motor provided separately from the first motor and connected to the second impeller to rotate the second impeller.
The method according to claim 3,

The first valve is provided as a three-way valve for communicating any one of the second discharge passage and the compression passage with the first discharge passage,

And the second valve is positioned farther from the second suction port at a position where the compression channel and the second inflow channel are laminated, and are provided as a solenoid valve for opening and closing the second inflow channel.
The method according to claim 3,

The first valve is provided as a three-way valve for communicating any one of the second discharge passage and the compression passage with the first discharge passage,

And the second valve is provided at a position where the compression passage and the second inflow passage are laminated, and optionally provided as a three-way valve for communicating the compression passage and the second inflow passage.
A first impeller having a first suction port and a first discharge port, compressing the fluid flowing into the first suction port by a rotational motion and discharging the fluid to the first discharge port;

A first motor for rotationally driving the first impeller;

A second impeller having a second suction port and a second discharge port, for compressing the fluid flowing into the second suction port by a rotational motion and discharging the fluid to the second discharge port;

A second motor provided separately from the first motor and driving the second impeller to rotate;

A first discharge passage connected to the first discharge port;

A second discharge passage connected to the second discharge port separately from the first discharge passage;

A first valve provided at an end of the first discharge passage;

A first compression passage communicating the first valve with the second discharge passage;

A second compression passage communicating with the first discharge passage via the first valve;

A second valve provided at an end of the second compression passage;

A second inflow passage communicating the second valve with the second suction port; And

And a suction passage connected to the second valve separately from the second suction passage and selectively in communication with the second suction passage.
The method according to claim 10,

The first valve may include a two-stage compression path through which the fluid introduced into the first suction port is compressed and discharged sequentially passing through the first impeller and the second impeller, and the fluid discharged from the first discharge port and the second discharge port. Turbo compression system, characterized in that for selectively controlling the one-stage compression path is laminated and discharged.
The method according to claim 11,

When the fluid is controlled to flow along the two-stage compression path, the second valve is controlled such that the second inflow passage communicates with the second compression path, and when the fluid is controlled to flow along the first compression path. And the second valve is controlled such that the second inflow passage communicates with the suction passage.
The method according to claim 10,

The first valve and the second valve is a turbo compression system, characterized in that provided as a three-way valve.