KR101712723B1 - Apparatus for controlling thrust and cooling bearing using compressed air - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust regulating and bearing cooling apparatus using compressed air, and a thrust regulating and bearing cooling apparatus using compressed air according to the present invention includes a shaft to which a rotating body is mounted; A housing enclosing the shaft and spaced apart from the shaft by a predetermined distance to form a flow path through which the compressed air compressed by the rotating body flows; A supply passage which is provided at a predetermined position of the flow passage and is provided as a plurality of passages through which the compressed air is supplied to the flow passage side; A valve installed in the plurality of supply passages; A pressure sensor installed in each of the plurality of supply passages; A controller for controlling displacement of the shaft by controlling the amount of compressed air supplied through each supply passage by calculating displacement information of the shaft from pressure of each supply passage measured from the pressure sensor and controlling the valve; And a control unit. Thereby, there is provided a thrust regulating and bearing cooling apparatus using compressed air that can control the thrust of a shaft mounted with a rotating body by using compressed air and cool the bearing mounted on the shaft.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a thrust regulating and bearing cooling apparatus using compressed air,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a thrust regulating and bearing cooling apparatus using compressed air, and more particularly, to a thrust regulating and bearing cooling apparatus using compressed air to regulate the thrust of a shaft mounted with a rotating body, To a thrust regulating and bearing cooling apparatus to be used.

2. Description of the Related Art Generally, a high-speed rotating machine such as a compressor, a turbine or the like is rotated by a rotating body mounted on a shaft, thereby generating thrust. That is, a force acts in the axial direction of the shaft and the rotating body.

Accordingly, bearings are used to support the shaft, which is the rotating shaft of the high-speed rotary machine, and recently, so-called air bearings suitable for high-speed operation, advantageous in assembly and mass production, and excellent durability are mainly used.

So-called gas bearings that use air or gaseous fluid as a working fluid without using lubricating oil can be largely divided into hydrostatic bearings and dynamic pressure bearings.

A hydrostatic bearing is a type in which air or gas pressurized by an external compressor is fed between bearings to obtain a load bearing capacity. Instead of requiring a pressure source (external pressurizing device), the shaft can be lifted Therefore, it is possible to avoid bearing damage due to solid friction.

The dynamic pressure bearing is a type that obtains the load capacity by drawing the surrounding air or gas to the bearing through the rotation of the shaft to increase the pressure and does not require a separate pressure source. Instead, the dynamic pressure bearing necessarily has a solid friction And the bearing life is shortened. Therefore, it is necessary to coat the bearing surface with a solid lubricant in order to prevent this.

Air bearings during dynamic pressure bearings float the shaft using air. At this time, the air bearing rotates at a high speed and the air pressure gradient changes abruptly in a small gap between the rotary shaft and the bearing, so that a lot of heat is generated during operation. , Stable and smooth rotation of the rotating shaft can not be guaranteed, and the durability of the structure is deteriorated.

On the other hand, miniaturization of the structure for generating power is continuously required, and accordingly, the necessity and urgency of the micro power source is increasing. In the case where the apparatus is downsized, the continuous thrust due to the rotation of the rotating body damages the apparatus and causes a decrease in durability.

Accordingly, there is a demand for an apparatus capable of controlling the thrust applied to the shaft as well as the cooling of the bearings provided in the shaft.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a displacement sensor that calculates displacement information of a shaft from a displacement measurement sensor and calculates an axial thrust from a pressure sensor to calculate the amount of compressed air supplied to each region of the flow path And controlling the thrust of the shaft mounted with the rotating body by using the compressed air and cooling the bearing mounted on the shaft by using compressed air.

The above object is achieved according to the present invention by providing a shaft to which a rotating body is mounted; A housing enclosing the shaft and spaced apart from the shaft by a predetermined distance to form a flow path through which the compressed air compressed by the rotating body flows; A supply passage which is provided at a predetermined position of the flow passage and is provided as a plurality of passages through which the compressed air is supplied to the flow passage side; A valve installed in the plurality of supply passages; A pressure sensor installed in each of the plurality of supply passages; A controller for controlling displacement of the shaft by controlling the amount of compressed air supplied through each supply passage by calculating displacement information of the shaft from pressure of each supply passage measured from the pressure sensor and controlling the valve; And a thrust regulating and bearing cooling apparatus using compressed air.

The supply passage includes an integrated pipe through which the compressed air supplied from the rotating body flows, and a branch pipe branching from the integrated pipe and communicating with a predetermined point of the flow passage, Respectively.

The displacement sensor may further include a displacement measuring sensor for measuring a displacement of the shaft due to a thrust applied to the shaft, wherein the controller receives displacement information of the shaft from the displacement measuring sensor and the pressure sensor, So that the displacement of the shaft is controlled by controlling the amount of compressed air supplied through each of the supply paths.

Here, it is preferable that the rotating body is provided as a compressor and a turbine, and is mounted on the shaft at a predetermined distance from each other, and the displacement measuring sensors are provided in pairs and are installed on the disk of the rotating body.

Here, the rotating body may be provided as a compressor and a turbine, and may be mounted on the shaft at a predetermined distance from each other, and the displacement measuring sensor may be installed on a disk of the compressor.

Here, it is preferable that the compressor compresses the air introduced from the outside and supplies the compressed air to the flow path side.

The apparatus may further include a bearing mounted on the shaft and supporting a load applied to the shaft, the bearing using the compressed air, and a temperature measuring sensor measuring a temperature of the bearing, It is preferable that the temperature of the bearing is controlled by controlling the amount of compressed air supplied through each supply passage by controlling the valve by receiving the temperature information of the bearing.

Here, the bearing includes: a thrust bearing for supporting a load in the longitudinal direction of the shaft; And a radial bearing for supporting a radial load of the shaft.

Preferably, the thrust bearing is mounted at a predetermined distance from the center of the shaft, and one of the supply passages supplies compressed air to the thrust bearing side.

According to the present invention, there is provided a thrust regulating and bearing cooling apparatus using compressed air capable of controlling the thrust of a shaft by controlling the amount of compressed air supplied to each region of the flow path formed by the shaft and the housing.

In addition, the bearings mounted on the shaft can be cooled together using compressed air to control the thrust of the shaft.

Further, since the axial thrust can be calculated through the pressure sensor, the thrust can be controlled irrespective of the installation limitation of the displacement measuring sensor due to the high temperature.

Further, since the displacement measurement sensor is provided in each of the pair of rotors, it is possible to accurately determine the difference in displacement according to the temperature difference between the rotors.

Further, when the rotating body is provided by a compressor and a turbine, the displacement measuring sensor is installed in the compressor, so that the displacement of the shaft can be measured even if there is an installation restriction by a high temperature turbine.

Also, by automatically controlling the opening and closing amount of the valve through the displacement measuring sensor, the pressure sensor and the temperature measuring sensor, it is possible to adjust the thrust of the shaft and cool the bearing more easily and precisely.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view of a rotation system of a thrust regulation and bearing cooling system using compressed air according to an embodiment of the present invention,
FIG. 2 is a schematic exploded perspective view of a rotation system of a thrust regulating and bearing cooling apparatus using compressed air of FIG. 1,
FIG. 3 is a schematic diagram of a thrust regulating and bearing cooling apparatus using compressed air of FIG. 1,
Figs. 4 and 5 are views schematically showing operation of the thrust regulating and bearing cooling apparatus using compressed air of Fig. 1; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a thrust control and bearing cooling apparatus using compressed air according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic perspective view of a rotation system of a thrust regulating and bearing cooling apparatus using compressed air according to an embodiment of the present invention. FIG. 2 is a schematic view of a rotation system of a thrust regulating and bearing cooling apparatus using compressed air of FIG. FIG. 3 is a schematic view of a thrust regulating and bearing cooling apparatus using compressed air of FIG. 1; FIG. 1 to 3, a thrust adjustment and bearing cooling apparatus 100 using compressed air according to an embodiment of the present invention includes a shaft 110, a rotating body 120 applied to the shaft 110, A housing 130 disposed to surround the shaft 110, a bearing 140 mounted on the shaft 110, a supply passage 150 serving as a passage for the compressed air supplied to the passage 131, A valve 160 installed in the supply passage 150, a pressure sensor 170 measuring the pressure of the supply passage 150, a displacement measuring sensor 180 measuring the displacement of the shaft 110, 140 and a control unit 195. The temperature sensor 190 measures the temperature of the fluid.

The shaft 110 is configured to transmit power by rotation of the rotating body 120. In the shaft 110, a pair of rotating bodies 120 are mounted with a predetermined spacing therebetween, and a bearing 140 for supporting a load is mounted.

The rotating body 120 is for converting the energy of the fluid into mechanical power. The rotating body 120 is provided in pairs and is mounted on the shaft 110, and the pair of rotating bodies 120 are spaced apart from each other by a predetermined distance.

In this embodiment, the rotating body 120 is provided with a compressor 121 and a turbine 122, respectively, and compresses the air introduced from the outside through the compressor 121, and the compressed air moves toward the turbine 122 side. A portion of the compressed air that has been compressed through the compressor 121 is moved to the flow path 131 formed between the rotating body 120 and the housing 130 through the supply flow path 150, The thrust is applied and the cooling of the bearing 140 is performed.

The housing 130 is configured to receive the shaft 110 and is spaced apart from the shaft 110 by a predetermined distance. The spacing space between the shaft 110 and the housing 130 serves as a flow path 131 through which compressed air having passed through the compressor 121 flows. That is, the housing 130 is spaced apart from the shaft 110 by a predetermined distance to form a flow path 131.

In the present invention, the housing 130 is spaced apart from the shaft 110 by a predetermined distance and is disposed to surround the shaft 110. However, the present invention is not limited thereto, and the shaft 110 and the rotating body 120 are installed Refers to a configuration or a set of configurations that are spaced apart from the shaft 110 in any device.

The bearing 140 includes a thrust bearing 141 and a radial bearing 142 for supporting a load applied to the shaft 110 by the rotation of the rotating body 120.

The thrust bearing 141 is mounted on a thrust collar 143 mounted on the shaft 110 to support a load applied along the longitudinal direction of the shaft 110, that is, along the axial direction of the rotating body 120 .

The thrust bearing 141 is mounted on the shaft 110 and mounted at a predetermined distance from the center of the shaft 110. In this embodiment, the thrust bearing 141 is located at a position closer to the compressor 121 than the turbine 122 Respectively. One of the branch pipes (152) is formed on the thrust bearing (141) side for cooling the thrust bearing (141). The compressed air supplied through the branch pipe 152 is moved to both the compressor 121 and the turbine 122 side and the thrust bearing 141 is mounted close to the compressor 121, The compressed air greatly affects the compressor 121 side and regulates the thrust applied to the shaft 110.

The radial bearing 142 is configured to support a load applied along the radial direction of the shaft 110. [ In this embodiment, the radial bearing 142 is installed between the thrust bearing 141 and the turbine 122.

Meanwhile, the bearing 140 is provided with an air bearing. Air bearings support the shaft using an automatically-generated fluid dynamic pressure between a high-speed rotating disc and a foil-like structure. In the present embodiment, compressed air which has passed through the compressor 121 and has flowed into the flow path 131 is used. A compressed air film is formed between the bearing 140 and the shaft 110 while the shaft 110 rotates at a high speed and is lifted and rotated at a high speed without friction so that no separate lubricant is required. Meanwhile, the compressed air introduced into the oil passage 131 not only supports the shaft 110 but also the bearing 140 is cooled, thereby preventing overheat damage.

The supply passage 150 is a passage through which the compressed air having passed through the compressor 121 is supplied to the passage 131 side and includes the integral pipe 151 and the branch pipe 152. A plurality of branch pipes (152) are provided and are respectively installed at predetermined positions of the flow path (131). The compressed air having passed through the compressor 121 is transferred to the integrated pipe 151 and then branched to the branch pipes 152 to be supplied to the respective areas of the oil passage 131.

In this embodiment, two branch pipes 152 are provided, one for supplying compressed air to the thrust bearing 141 side and the other for supplying compressed air to the radial bearing 142 side.

The valve 160 is provided for controlling the amount of compressed air supplied to the flow path 131 through the branch pipe 152 and provided to the branch pipes 152 respectively. The valve 160 controls the amount of compressed air supplied to each branch pipe 152 in accordance with the degree of opening and closing. That is, the valve 160 is configured to distribute the compressed air passing through the integrated pipe 151 according to the amount required in each branch pipe 152.

The degree of opening and closing is controlled by controlling the valve 160 according to the displacement information and the temperature information measured by the pressure sensor 170, the displacement measurement sensor 180 and the temperature measurement sensor 190, The amount of compressed air supplied to each branch pipe 152 is regulated.

The pressure sensor 170 is a structure for measuring the thrust balancing applied to the shaft 110. An external force is applied to the shaft 110 in the longitudinal direction by the rotation of the rotating body 120 and the position of the shaft 110 can be moved by the thrust. The pressure sensor 170 measures the balancing of such thrust.

Specifically, the plurality of pressure sensors 170 are provided at predetermined positions, and measure the balancing of the thrust through pressure measurement at each point. In this embodiment, the pressure sensor 170 is installed in the branch pipe 152 of the supply flow passage 151, and measures the pressure in the branch pipe 152. One of the branch pipes 152 is located on the side of the thrust bearing 141, that is, in the vicinity of the compressor 121 and the other is located on the side of the radial bearing 142, i.e., in the vicinity of the turbine 122. If the pressure of the branch pipe 152 is measured through the pressure sensor 170 so that the pressure of the branch pipe 152 close to the compressor 121 is higher, the displacement or the axial thrust is generated toward the compressor 121 . Conversely, if the pressure of the branch pipe 152 close to the turbine 122 is higher, it means that displacement or axial thrust has occurred to the turbine 122 side. The pressure information measured by the pressure sensor 170 is transmitted to the control unit 195.

The displacement measurement sensor 180 is a sensor for measuring the displacement of the shaft 110 due to the thrust applied to the shaft 110. As described above, an external force is applied to the shaft 110 along the longitudinal direction by the rotation of the rotating body 120, and the position of the shaft 110 can be moved by the thrust. The displacement measurement sensor 180 measures the displacement of the shaft 110, and the measured displacement information is transmitted to the control unit 195.

Meanwhile, it is preferable that the displacement measurement sensors 180 are provided in the two rotors 120. The temperatures of the respective rotating bodies 120 may be different from each other. In this case, since the magnitude of displacement may be different, it is installed in each rotating body 120 to perform more accurate measurement. Further, the displacement measurement sensor 180 can be installed at the end of the shaft 110 or on the back plate (disk) so as to measure a more accurate value.

However, the displacement measurement sensor 180 is not necessarily provided in two, and the displacement measurement sensor 180 may be provided in one and installed in the rotating body 120 having a relatively low temperature. The temperature of each of the rotors 120, that is, the compressor 121 and the turbine 122 are different from each other. In this case, the turbine 122 has a high temperature due to the structure of a combustor or the like. However, since the displacement of the shaft 110 can be known even when it is provided only on the compressor 121 side, it can be installed on the end of the shaft 110 of the compressor 121 or on the back plate of the compressor 121. [

Displacement information can be obtained through the displacement measuring sensor 180. However, more accurate and accurate measurement is possible by measuring the pressure at each of the branch pipes 152 through the pressure sensor 170. [ Since the compressor 121 and the turbine 122 are different in temperature from each other, when the displacement measurement sensor 180 is installed in only one of the configurations, the displacement information in the other configurations is unknown or can not be accurately known . The thrust generated in the rotating body 120 is generated in the disk (back plate), so it must be installed directly on the disk of the rotating body 120. However, there is a problem that installation is restricted when the rotating body 120 is hot . That is, since the turbine 122 is at a high temperature, it can be installed only on the side of the compressor 121 due to its installation limit. However, since the pressure sensor 170 is not required to be installed directly on the rotating body 120, there is no restriction on the installation, and since the axial thrust can be calculated from the difference in pressure, the problem of the displacement measuring sensor 180 is not generated .

The temperature measurement sensor 190 is provided to the thrust bearing 141 and the radial bearing 142, respectively, for measuring the temperature of the bearing 140. [ The temperature information measured in each bearing 140 is transmitted to the controller 195.

The control unit 195 controls the opening / closing degree and opening / closing degree of the valve 160 according to the displacement information and the temperature information measured from the pressure sensor 170, the displacement measurement sensor 180 and the temperature measurement sensor 190 .

The pressure of the branch pipe 152 on the side of the thrust bearing 141 is higher than the pressure of the branch pipe 152 on the side of the radial bearing 142 when the pressure sensor 170 measures the pressure of each branch pipe 152, When the shaft 110 is moved in the direction of the compressor 121 by measuring the displacement of each of the rotors 120 by the measurement sensor 180, the control unit 195 controls the valve installed on the thrust bearing 141 side The valve 160 is opened to a smaller extent than the valve 160 provided on the side of the radial bearing 142 so that a relatively small amount of compressed air is supplied to the thrust bearing 141 side. That is, the compressed air supplied to the flow path 131 has a relatively large influence on the turbine 122 side, so that the thrust can be controlled.

On the other hand, when the temperature of the thrust bearing 141 is higher than the temperature of the radial bearing 142, the valve provided on the thrust bearing 141 side is opened more than the valve 160 provided on the side of the radial bearing 142, The thrust bearing 141 is cooled by supplying a relatively large amount of compressed air to the bearing 141 side.

Conversely, when the pressure of the branch pipe 152 on the side of the radial bearing 142 is higher than the pressure of the branch pipe 152 on the side of the thrust bearing 141, When the shaft 110 is moved in the direction of the turbine 122 by measuring the displacement, the controller 195 controls the valve 160 installed on the side of the radial bearing 142 to move the valve 160 provided on the thrust bearing 141 side 160 so that relatively little compressed air is supplied to the radial bearing 142 side. When the temperature of the radial bearing 142 side is higher than the temperature of the thrust bearing 141, a relatively large amount of compressed air is supplied to the radial bearing 142 side to cool the radial bearing 142.

Hereinafter, an application example of a thrust adjustment and a bearing cooling apparatus using compressed air according to an embodiment of the present invention will be described. This application example relates to a thrust regulating and bearing cooling apparatus using compressed air applied to a micro gas turbine.

Prior to explanation, a micro gas turbine to which the present invention is applied will be briefly described.

Recently, the need for a portable power source that can be used for a long time unlike a large-scale centralized power plant has greatly increased throughout the industry and society. The power sources include fuel cells and lithium ion rechargeable batteries. Particularly, the miniaturized gas turbine has advantages such as low initial investment cost, small size and light weight compared with reciprocating engine having the same output, and simple structure and low maintenance cost.

Lithium secondary batteries are mainly used in portable devices currently in use. However, typical commercial secondary batteries have a disadvantage in that they are short in continuous use time and take a long time to charge, and the energy density is close to the theoretical limit, so that the performance of portable electronic devices can not be solved by conventional secondary batteries . Recently, as the products requiring portable power source such as pet robots, humanoid robots, and military robots are in commercialization phase, the need and urgency of a new micro power feeder is increasing. The micro power generation system is basically required to have higher energy density than the existing power source, and it is assured that it is necessary to develop the power generation system. Ultra micro gas turbine (UMGT) is attracting attention as a power generation device with high output and energy density.

Generally, a micro gas turbine has a structure in which a generator, a compressor, and a turbine are connected by an axis, and a generator portion and a compressor and a turbine shaft are coupled by coupling. At this time, the compressor and the turbine portion are the portions where the dynamic pressure due to the rotation is most generated in the micro gas turbine, and the position of the shaft is changed due to the thrust, and this causes deterioration of the durability and performance of the micro gas turbine .

Hereinafter, a thrust adjustment and bearing cooling apparatus using compressed air applied to a micro gas turbine will be described. Since the shaft 110, the bearing 140, the valve 160, the pressure sensor 170, the displacement measurement sensor 180, the temperature measurement sensor 190, and the control unit 195 are the same, Is omitted.

The compressor 121 is configured to receive a gas from the outside to generate a high-pressure gas. The compressor 121 rotates to compress the gas supplied from the outside to generate a high-pressure gas. At this time, the compressed gas supplied from the outside to the compressor 121 has a temperature of about 200 ° C.

The combustor (not shown) is configured to generate high temperature and high pressure gas from the high pressure gas supplied from the compressor 121. A combustor (not shown) is provided in a hollow shape, a fuel supply pipe (not shown) for supplying fuel is communicated, and an igniter is installed. That is, the combustor (not shown) generates a high-temperature and high-pressure gas by igniting a mixture gas mixed with high-pressure gas and fuel supplied from the compressor 121 through an igniter (not shown)

The turbine 122 is configured to generate power by receiving energy from high-temperature and high-pressure gas generated in a combustor (not shown). The turbine 122 is installed in the shaft 110 together with the compressor 121.

The supply passage 150 is a passage through which a part of the compressed air having passed through the compressor 121 is branched and supplied to the passage 131 side. The high-pressure gas supplied from the outside and having passed through the compressor 121 is supplied to the combustor (not shown) to transfer energy to the turbine 122 as a high-temperature and high-pressure gas. At this time, not all the gas is supplied to the combustor (not shown), and a part of the gas is supplied to the flow path 131 side through the supply flow path 150. That is, some of the high-pressure gas that has passed through the compressor 121 is supplied to the supply passage 150 for cooling the bearing 140 and adjusting the thrust of the shaft 110.

Hereinafter, the operation of thrust regulation and bearing cooling apparatus using compressed air according to one embodiment of the present invention will be described.

Figs. 4 and 5 are views schematically showing operation of the thrust regulating and bearing cooling apparatus using compressed air of Fig. 1; Fig.

As the compressor 121 rotates, the air flowing into the compressor 121 from the outside is compressed and becomes high-pressure air. The high-pressure air is supplied to the combustor (not shown) to transfer energy to the turbine 122, and the remaining portion of the high-pressure air is supplied to the passage 131 through the supply passage 150.

4, when the temperature of the thrust bearing 141 is relatively higher than the radial bearing 142 due to the continuous rotation of the compressor 121 and the turbine 122, or when the temperature of the thrust bearing 141 When the pressure of the engine 152 is lower than the pressure of the branch pipe 152 on the side of the radial bearing 142 or when the shaft 110 is measured as moving toward the turbine 122 side, The displacement information and the temperature information from the displacement measurement sensor 180 and the temperature measurement sensor 190 are transmitted to the control unit 195.

The control unit 195 determines the ratio of the amount of air to be supplied to the thrust bearing 141 and the radial bearing 142 side according to the temperature of the thrust bearing 141 and the displacement of the shaft 110. [ And controls the degree of opening of the valve 160 according to the determined ratio, so that a relatively large amount of air is supplied to the thrust bearing 141 side. The air moves toward the compressor 121 and the turbine 122 along the flow path 131 but relatively moves toward the turbine 122 side to control the cooling of the thrust bearing 141 and the thrust of the shaft 110.

5, when the temperature of the radial bearing 142 is relatively higher than the temperature of the thrust bearing 141 due to the continuous rotation of the compressor 121 and the turbine 122, When the pressure sensor 170 and the displacement measurement sensor 180 measure the temperature of the radial bearing 142 and the displacement of the shaft 110 due to excessive movement of the thrust bearing 110, The ratio of the amount of air to be supplied to the radial bearing 142 and the radial bearing 142 is determined. The opening degree of the valve 160 is controlled according to the determined ratio, and a relatively large amount of air is supplied to the radial bearing 142 side. The air moves to the side of the compressor 121 and the turbine 122 along the flow path 131 but relatively moves toward the turbine 121 and controls the cooling of the radial bearing 142 and the thrust of the shaft 110 .

Therefore, according to the present invention, the displacement information of the shaft is calculated from the pressure sensor and the displacement measurement sensor, and the amount of compressed air supplied to each region of the flow path formed by the shaft and the housing is controlled, And a thrust regulating and bearing cooling apparatus using compressed air capable of cooling a bearing mounted on a shaft using compressed air.

The scope of the present invention is not limited to the above-described embodiments, but may be embodied in various forms of embodiments within the scope of the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

100: thrust control and bearing cooling system using compressed air
110: shaft 120: rotating body
121: compressor 122: turbine
130: housing 140: bearing
141: thrust bearing 142: radial bearing
150: supply flow passage 160: valve
170: Pressure sensor 180: Displacement measurement sensor
190: temperature measuring sensor 195:

Claims (9)

A shaft in which a compressor and a turbine are mounted with a predetermined gap therebetween;
A housing enclosing the shaft and spaced apart from the shaft by a predetermined distance to form a flow path through which the compressed air compressed by the compressor flows;
A supply passage through which the compressed air supplied from the compressor flows and a branch pipe branching from the integrated pipe and communicating with different predetermined points of the flow passage;
Valves respectively installed in the branches;
A pressure sensor for measuring a pressure at a predetermined position of the flow passage connected to the branch pipe installed and installed in the branch pipe;
The thrust of the shaft is calculated from a difference between pressure values at predetermined positions of the flow path connected to the respective branch pipes measured from the pressure sensor, and the valve is controlled in accordance with the calculated thrust, And controlling a thrust of the shaft by controlling an amount of compressed air supplied to the thrust adjusting and bearing cooling apparatus. delete The method according to claim 1,
And a displacement measuring sensor for measuring a displacement of the shaft due to a thrust applied to the shaft,
The control unit controls displacement of the shaft by controlling the amount of compressed air supplied through each of the supply channels by receiving the displacement information of the shaft from the displacement measurement sensor and the pressure sensor A thrust regulating and bearing cooling device using compressed air. The method of claim 3,
Wherein the displacement measuring sensors are provided in pairs and are installed on the compressor and the disk of the turbine, respectively. The method of claim 3,
Wherein the displacement measurement sensor is mounted on a disk of the compressor. 6. The method of claim 5,
Wherein the compressor compresses the air introduced from outside and supplies the compressed air to the flow path side. 7. The method according to any one of claims 1 to 6,
A bearing mounted on the shaft and supporting a load applied to the shaft, the bearing using the compressed air, and a temperature measuring sensor measuring a temperature of the bearing,
Wherein the control unit controls temperature of the bearing by controlling the amount of compressed air supplied through each supply passage by receiving the temperature information of the bearing from the temperature measurement sensor and controlling the valve, Thrust regulation and bearing cooling system using air. 8. The method of claim 7,
The bearing
A thrust bearing for supporting a load in the longitudinal direction of the shaft; And a radial bearing for supporting a radial load of the shaft. ≪ Desc / Clms Page number 19 > 9. The method of claim 8,
Wherein the thrust bearing is mounted at a predetermined distance from the center of the shaft,
Wherein one of the supply passages supplies compressed air to the thrust bearing side.

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