Bearing cooling device of gas turbine

Abstract

The invention provides a bearing cooling device of a gas turbine, and relates to the field of gas turbines. The bearing cooling device of the gas turbine comprises a bearing seat, oil spraying rings for spraying oil to a bearing are arranged at the positions, located on the two end faces of the bearing, in the bearing seat, discharge holes are formed in the positions, located on the two sides of the bearing, of the bottom end of the bearing seat respectively, and the two discharge holes are connected and communicated through a second reversing valve. The outlet end of the second reversing valve is connected and communicated with a sewage pump which pumps out lubricating media, the two oil injection rings are connected and communicated through a first reversing valve, and the inlet end of the first reversing valve is connected and communicated with a pressure pump which pumps the lubricating media. According to the bearing cooling device of the gas turbine, the runners working in a staggered mode are arranged in the bearing seat, the bearing is alternately cooled through the lubricating media flowing in different directions, high-speed flowing is kept, and therefore the bearing of the gas turbine can be fully cooled and lubricated.

Description

Technical Field

[0001] This invention relates to the field of gas turbines, specifically to a bearing cooling device for gas turbines. Background Technology

[0002] During gas turbine operation, friction between moving parts such as bearings and gears generates heat, and the high-temperature gas may conduct heat through these parts, causing the lubricating oil temperature to rise. If the oil temperature is too high, its viscosity will decrease, its lubricating performance will weaken, and it may even oxidize and deteriorate. Therefore, effective cooling is essential to control the oil temperature.

[0003] Existing patent CN120026993A discloses a bearing cooling device for a gas turbine, relating to the field of gas turbine cooling technology. It includes: a shaft on which a compressor, turbine, and combustion chamber are sequentially mounted; a guide vane assembly located at the outlet end of the combustion chamber for guiding hot gas into the turbine; a bearing housing assembly and a bearing, the bearing being installed within the bearing housing assembly; and a heat guiding component located between the guide vane assembly and the bearing housing assembly. The gas turbine bearing cooling device provided by this invention guides the heat from the hot gas at the combustion chamber outlet to the distal region of the bearing housing assembly via the heat guiding component. The first end of the heat guiding component is fixedly connected to the guide vane assembly, ensuring an effective starting point for heat transfer. The second end is connected to the bearing housing assembly via adjustable branches. The design of these branches allows heat to be evenly distributed across the bearing housing assembly, avoiding localized overheating. However, it still cannot solve the problem of overall heat generation.

[0004] Existing patent RU20180126301U discloses a lubrication system for a gas turbine engine bearing support, which can be used for the supply and discharge of lubricating oil in bearings (such as high-temperature aero-gas turbine engine bearings). The target technical achievement of this solution is to improve the reliability and durability of the gas turbine engine support and even the entire engine by improving the lubrication conditions and cooling efficiency of the bearing. The achievement is realized as follows: in the support node of the gas turbine engine, there is a shaft with a channel for organizing the flow of an air-oil mixture in the inner ring region of the bearing, a support housing (with a guaranteed clearance between it and the outer ring of the bearing), a separator with grooves for mounting rolling elements, and an element with centrifugal blades mounted on the shaft and extending from the bearing end; the element for discharging the air-oil mixture is inclined towards the direction of rotation of the shaft and designed in an airfoil shape. Unlike the prior art, the support housing includes an air-oil mixture introduction and throttling element, and before it, at the bearing inlet, there is an oil-air mixing zone formed by an additional wall mounted on the outer surface of the support housing, in which lubricating oil is transported from an external oil tank to the mixing zone through a pipe. The air-oil mixture introduction and throttling element are designed with a perforated structure. However, in this technical solution, the oil-air mixture impacts the bearing from one side, leading to bearing wear and uneven cooling. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a bearing cooling device for gas turbines, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bearing cooling device for a gas turbine, comprising a bearing housing, wherein an oil injection ring for spraying oil onto the bearing is provided inside the bearing housing at both ends of the bearing, and discharge holes are respectively opened at the bottom end of the bearing housing on both sides of the bearing, the two discharge holes being connected and communicating through a reversing valve two, the outlet end of the reversing valve two being connected and communicating through a drain pump for extracting lubricating medium, the two oil injection rings being connected and communicating through a reversing valve one, the inlet end of the reversing valve one being connected and communicating through a pressurizing pump for pumping lubricating medium, the oil injection rings and the discharge holes on the opposite side of the bearing being opened simultaneously, and the drain pump being connected and communicating through a cooling mechanism for cooling the lubricating medium.

[0007] Preferably, the cooling mechanism includes a cooling chamber, a filter element frame is disposed at the center of the cooling chamber, a filter element ring is disposed in the middle of the filter element frame, an induced draft fan connected to the filter element frame is installed above the cooling chamber, a spray ring with an outlet pointing to the filter element frame is disposed inside the cooling chamber, the spray ring is connected to and communicates with a sewage pump, the spray ring is located below the sewage pump, a cooling pipe bent within the space is disposed at the lower part of the cooling chamber, lubricating oil is temporarily stored inside the cooling chamber, a liquid flow ring is disposed above the outer surface of the filter element frame, the liquid flow ring pumps out the lubricating oil temporarily stored inside the cooling chamber and sprays it downwards onto the filter element ring, and a return pipe connected to an existing lubricating oil pump station is disposed at the bottom of the cooling chamber.

[0008] Preferably, the bearing housing includes a cylindrical body with end caps at both ends for sealing. The bearing is placed in the center of the cylindrical body, and support rings that restrict bearing sliding are provided on both sides of the bearing. An oil injection ring is disposed between the support rings and the end caps. A through hole is provided on the side wall of the cylindrical body at the location of the oil injection ring, and a discharge hole is provided below the location where the support ring is installed on the cylindrical body.

[0009] Preferably, the bearing mounting part in the middle part of the cylinder, the oil injection ring mounting parts with a diameter larger than the bearing mounting part on both sides of the bearing mounting part, and the end cap mounting part with a diameter larger than the diameter of the oil injection ring mounting part on the outermost side, the discharge holes are opened on both sides of the bottom end of the bearing mounting part, and the bottom end of the bearing mounting part is provided with a collection cover that covers one side of the discharge hole.

[0010] Preferably, the oil injection ring includes a cavity, with a spray hole on the end face of the cavity near the bearing, and a pipe connection port recessed into the cavity on one side of the cavity. The support ring includes a contact ring that contacts the end face of the bearing, and a support rod is fixedly installed on the end of the contact ring away from the bearing. The support rod passes through the cavity and contacts the end cover. The end cover near the bearing has a positioning groove for accommodating the support rod.

[0011] Preferably, the inlet end of the reversing valve is directly connected to the outlet end of the existing lubrication station.

[0012] Preferably, the cooling mechanism is a liquid cooling mechanism or an air cooling mechanism, and the cooling mechanism is installed inside the existing lubrication station.

[0013] Preferably, the pressurizing pump is an air compressor pump, which is provided with an air inlet and a lubricating oil inlet. The air inlet is connected to an air inlet pipe for conveying compressed air for filtering and drying, and the lubricating oil inlet is connected to and communicates with the oil outlet of an existing lubricating oil station.

[0014] Preferably, it includes a temperature sensor for detecting bearing temperature, the temperature sensor controls the delivery efficiency of the pressurizing pump, an air pressure detection unit is provided on the outside of the bearing housing, and the sewage pump makes the air pressure inside the bearing housing equal to the air pressure outside the bearing housing based on the delivery efficiency of the pressurizing pump and the delivery efficiency of the air pressure detection unit.

[0015] Preferably, it includes a speed detection unit for detecting the spindle speed, wherein the speed is positively correlated with the proportion of lubricating oil in the lubricating oil mist.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The bearing cooling device of the gas turbine, by setting staggered flow channels in the bearing housing, alternately cools the bearing by lubricating media flowing from different directions and maintaining high-speed flow, thereby enabling sufficient cooling and lubrication of the gas turbine bearing. 2. In the bearing cooling device of the gas turbine, the pressurizing pump is an air compressor pump, which is provided with an air inlet and a lubricating oil inlet. The air inlet is connected to an intake pipe for conveying filtered and dried compressed air. The air compressor pumps air into the intake pipe through drying and filtration. The lubricating oil inlet is connected and communicates with the oil outlet of an existing lubricating oil station. The lubricating oil station pumps a specified amount of lubricating oil into the lubricating oil inlet. The air compressor atomizes the lubricating oil with high-speed air and sprays the atomized lubricating oil onto the bearing. The bearing is lubricated by the lubricating oil, and the high-speed airflow achieves a heat dissipation effect. Alternating operation avoids fixed impact on the bearing. 3. The bearing cooling device of the gas turbine includes a bearing mounting section in the middle of the cylinder, an oil injection ring mounting section with a diameter larger than that of the bearing mounting section on both sides of the bearing mounting section, and an end cover mounting section with a diameter larger than that of the oil injection ring mounting section on the outermost side. The discharge holes are opened on both sides of the bottom end of the bearing mounting section. The bottom end of the bearing mounting section is provided with a collection cover that covers one side of the discharge hole. By setting the cylinder into a multi-segment stepped type, the device can be installed in the narrower middle section, such as setting the reversing valve one and reversing valve two in the gap between the bearing mounting section and the end cover mounting section. 4. The bearing cooling device of the gas turbine includes an oil injection ring comprising a cavity, with spray holes on the end face of the cavity near the bearing, and a pipe connection port recessed into the cavity on one side. The support ring includes a contact ring that contacts the bearing end face, and a support rod is fixedly installed on the end of the contact ring away from the bearing. The support rod passes through the cavity and contacts the end cover. The end cover near the bearing has a positioning groove for accommodating the support rod. Since the oil injection ring is a hollow cavity, directly squeezing and restricting the displacement of the bearing would cause shaking due to cavity deformation. Therefore, by optimizing the shape of the cavity, the support ring passes through the cavity and acts directly on the end cover, thereby ensuring the limiting of the bearing. 5. The bearing cooling device of this gas turbine is designed such that the lubricating oil mist after the bearing has been cooled is pumped into the cooling chamber. Because the oil mist contains a high amount of gas, and the lubricating oil needs to be condensed, the oil mist passes through a filter ring. Air passes through the filter ring, and the lubricating oil is isolated outside the filter ring. Simultaneously, lubricating oil cooled by the cooling pipes at the bottom is sprayed downwards to further cool the lubricating oil mist and flush the lubricating oil adhering to the surface of the filter ring into the cooling chamber for further cooling through the cooling pipes. This achieves thorough cooling and separation of the lubricating oil mist. As the lubricating oil is collected and the liquid level rises, it can be returned to the lubricating oil pump station for further treatment via the return pipe. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a half-sectional schematic diagram of the bearing housing according to Embodiment 1 of the present invention; Figure 3 This is an exploded view of the bearing housing according to Embodiment 1 of the present invention; Figure 4 This is a half-sectional schematic diagram of the bearing housing according to Embodiment 2 of the present invention; Figure 5 This is an exploded view of the bearing housing in Embodiment 2 of the present invention; Figure 6 This is a half-sectional schematic diagram of the cylindrical body of the present invention; Figure 7 This is a half-sectional schematic diagram of the fuel injection ring of the present invention; Figure 8 This is a half-sectional schematic diagram of the cooling mechanism of the present invention; Figure 9 This is a half-sectional schematic diagram of the cooling cavity of the present invention.

[0018] In the diagram: 1. Bearing housing; 2. Injection ring; 3. Drain hole; 4. Reversing valve II; 5. Sewage pump; 6. Reversing valve I; 7. Booster pump; 8. Cooling mechanism; 13. Cylinder; 101. End cap; 12. Support ring; 104. Through hole; 131. Bearing mounting part; 132. Injection ring mounting part; 133. End cap mounting part; 134. Collection cover; 201. Cavity; 202. Injection hole; 203. Pipe connection port ; 121. Contact ring; 122. Support rod; 123. Positioning groove; 71. Air inlet end; 72. Lubricating oil inlet end; 73. Air intake pipe; 9. Temperature sensor; 10. Air pressure detection unit; 11. Speed ​​detection unit; 801. Cooling chamber; 802. Filter element frame; 803. Filter element ring; 804. Exhaust fan; 805. Spray ring; 806. Cooling pipe; 807. Liquid flow ring; 808. Return pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0021] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0023] Example 1, such as Figure 2 , 3 As shown in Figures 8 and 9, a bearing cooling device for a gas turbine has an oil injection ring 2 located at both ends of the bearing inside the bearing housing 1. Drainage holes 3 are respectively opened at the bottom of the bearing housing 1 on both sides of the bearing. The two drainage holes 3 are connected and interconnected by a reversing valve 2. The outlet end of the reversing valve 2 is connected and interconnected with a sewage pump 5 that draws out lubricating medium. The two oil injection rings 2 are connected and interconnected by a reversing valve 1. The inlet end of the reversing valve 1 is connected and interconnected with a pressurizing pump 7 that pumps lubricating medium. The oil injection rings 2 and the drainage holes 3 on the opposite side of the bearing are opened simultaneously. The sewage pump 5 is connected and interconnected with a cooling mechanism 8 that cools the lubricating medium. By setting staggered flow channels inside the bearing housing 1, the bearing is alternately cooled by lubricating medium flowing from different directions and maintained at high speed, thereby enabling sufficient cooling and lubrication of the gas turbine bearing.

[0024] The bearing housing 1 includes a cylindrical body 13, with end caps 101 at both ends of the cylindrical body 13 for sealing purposes. The bearing is placed in the center of the cylindrical body 13, and support rings 12 on both sides of the bearing to restrict bearing sliding are provided. An oil injection ring 2 is disposed between the support rings 12 and the end caps 101. A through hole 104 is provided on the side wall of the cylindrical body 13 at the location where the oil injection ring 2 is located. A discharge hole 3 is provided below the location where the support ring 12 is installed on the cylindrical body 13. This arrangement facilitates the assembly of the bearing housing 1 under the aforementioned alternating rapid cooling effect.

[0025] The cylinder 13 has a bearing mounting part 131 in the middle, an oil injection ring mounting part 132 with a diameter larger than the bearing mounting part 131 on both sides, and an end cap mounting part 133 with a diameter larger than the diameter of the oil injection ring mounting part 132 on the outermost side. The discharge holes 3 are opened on both sides of the bottom end of the bearing mounting part 131. The bottom end of the bearing mounting part 131 is provided with a collection cover 134 that covers the discharge hole 3 on one side. By setting the cylinder 13 into a multi-segment stepped type, devices can be installed in the narrower middle part, such as setting the reversing valve 6 and the reversing valve 4 in the gap between the bearing mounting part 131 and the end cap mounting part 133.

[0026] The oil injection ring 2 includes a cavity 201. The cavity 201 has a spray hole 202 on its end face near the bearing. A pipe connection port 203 recessed into the cavity 201 is provided on one side of the cavity 201. The support ring 12 includes a contact ring 121 that contacts the bearing end face. A support rod 122 is fixedly installed on the end of the contact ring 121 away from the bearing. The support rod 122 passes through the cavity 201 and contacts the end cover 101. The end cover 101 near the bearing has a positioning groove 123 to accommodate the support rod 122. Since the oil injection ring 2 is a hollow cavity, directly squeezing and restricting the displacement of the bearing would cause the cavity 201 to deform and wobble. Therefore, by optimizing the shape of the cavity 201, the support ring 12 passes through the cavity 201 and acts directly on the end cover 101, thereby ensuring the limitation of the bearing.

[0027] The inlet of the reversing valve 6 is directly connected to the outlet of the existing lubrication station. The existing lubrication station has steps such as pumping out lubricating oil, collecting the returned lubricating oil, filtering and cooling the collected lubricating oil before reuse.

[0028] The cooling mechanism 8 adopts a liquid cooling mechanism or an air cooling mechanism, and the cooling mechanism 8 is installed inside the existing lubrication oil station.

[0029] In use, a lubricating oil line is directly connected to the inlet of the reversing valve 6 through the existing lubrication station. After the reversing valve 6 switches the oil circuit, the lubrication station pumps the lubricating oil into the injection ring 2 through the reversing valve 6. The liquid lubricating oil acts on the bearing surface, and at the same time, the lubricating oil is circulated back to the drain pump 5 in the lubrication station. The lubricating oil is pumped out on the other side of the injection ring 2. Under the pressure, the lubricating oil in the entire oil circuit keeps flowing relative to the bearing to achieve heat dissipation and lubrication. At the same time, after the oil supply is stopped, the flow direction of the oil circuit in the bearing housing 1 is switched by the reversing valve 6 and the reversing valve 4 before the lubricating oil is supplied again, so that both sides of the bearing can be fully cooled and lubricated.

[0030] Based on the previous embodiment, as follows Figure 1 , 4As shown in Figure 7, the pressurizing pump 7 is an air compressor pump. The air compressor pump is equipped with an air inlet end 71 and a lubricating oil inlet end 72. The air inlet end 71 is connected to an air inlet pipe 73 for conveying compressed air that has undergone filtration and drying. The air compressor pumps air into the air inlet pipe 73 through drying and filtration. The lubricating oil inlet end 72 is connected and connected to the oil outlet end of the existing lubricating oil station. The lubricating oil station pumps a specified amount of lubricating oil into the lubricating oil inlet end 72. The air compressor pump uses high-speed air to atomize the lubricating oil and sprays the atomized lubricating oil onto the bearing. The bearing is kept lubricated by the lubricating oil and the high-speed airflow achieves the effect of heat dissipation. Similarly, by switching the flow direction of the oil circuit in the bearing housing 1 and then supplying lubricating oil and air, both sides of the bearing can be adequately cooled and lubricated.

[0031] The system includes a temperature sensor 9 for detecting bearing temperature, which controls the delivery efficiency of the pressurizing pump 7. A pressure detection unit 10 is installed on the outside of the bearing housing 1. The drain pump 5, based on the delivery efficiency of the pressurizing pump 7 and the delivery efficiency detected by the pressure detection unit 10, ensures that the air pressure inside the bearing housing 1 equals the air pressure outside the bearing housing 1. When the pressure detection unit 10 detects that the external air pressure is zero, the pressurizing pump 7 pumps in more cooling medium than the drain pump 5 discharges cooling and lubricating medium. This results in the pressure inside the bearing housing 1 being greater than the pressure outside. Similarly, as long as the pumped-in and discharged cooling and lubricating media are the same, the internal and external pressures will be the same when the external air pressure is zero. In actual use, the external air pressure of bearing housing 1 is not zero, so the pumping in and out volume needs to be dynamically adjusted according to the air pressure changes. When the pressure inside bearing housing 1 is less than the external pressure, external impurities can easily enter the interior of bearing housing 1. When the internal pressure of bearing housing 1 is greater than the external pressure, lubricating oil gas can easily leak into the gas turbine, resulting in the accumulation of lubricating oil gas in the gas turbine. Therefore, it is necessary to maintain the pressure balance inside and outside bearing housing 1.

[0032] It includes a speed detection unit 11 for detecting the spindle speed. The speed is positively correlated with the proportion of lubricating oil in the lubricating oil mist. The faster the spindle speed, the more severe the wear. During the process of atomizing the lubricating oil with air, the volume of air is greater than the volume of lubricating oil. Adjusting the pumping volume of lubricating oil will not have a significant impact on the internal pressure of the bearing housing 1. However, increasing the concentration of lubricating oil can more fully lubricate the spindle. However, this method is not suitable for cold starts of the equipment. During cold starts, the machine should be warmed up first to fully lubricate the bearing.

[0033] The cooling mechanism 8 includes a cooling chamber 801, a filter element frame 802 is arranged in the center of the cooling chamber 801, a filter element ring 803 is arranged in the middle of the filter element frame 802, an induced draft fan 804 connected to the filter element frame 802 is installed above the cooling chamber 801, a spray ring 805 with its outlet pointing to the filter element frame 802 is arranged inside the cooling chamber 801, the spray ring 805 is connected to and passes through the sewage pump 5, and the spray ring 805 is located below the sewage pump 5, a cooling pipe 806 with a bend in the space is arranged at the lower part of the cooling chamber 801, lubricating oil is temporarily stored inside the cooling chamber 801, a liquid flow ring 807 is arranged above the outer surface of the filter element frame 802, the liquid flow ring 807 pumps out the lubricating oil temporarily stored inside the cooling chamber 801 and sprays it from top to bottom onto the filter element ring 803, and a return pipe 808 connected to the existing lubricating oil pump station is arranged at the bottom of the cooling chamber 801. With this setup, the lubricating oil mist, after being cooled by the bearing, is pumped into the cooling chamber 801. Because the oil mist contains a high amount of gas, and the lubricating oil needs to be condensed, the oil mist passes through a filter ring 803. Air passes through the filter ring 803, isolating the lubricating oil outside the filter ring 803. Simultaneously, lubricating oil cooled by the cooling pipe 806 at the bottom is sprayed downwards to further cool the lubricating oil mist. The lubricating oil adhering to the surface of the filter ring 803 is also flushed into the cooling chamber 801 and cooled by the cooling pipe 806, achieving thorough cooling and separation of the lubricating oil mist. As the lubricating oil is collected and the liquid level rises, it can be returned to the lubricating oil pump station through the return pipe 808 for further processing.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0035] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bearing cooling device for a gas turbine, comprising a bearing housing (1), characterized in that: Inside the bearing housing (1), oil spray rings (2) are provided at both ends of the bearing for spraying oil onto the bearing. Drainage holes (3) are respectively opened at the bottom of the bearing housing (1) on both sides of the bearing. The two drainage holes (3) are connected and connected through a reversing valve (4). The outlet end of the reversing valve (4) is connected and connected to a sewage pump (5) for pumping out lubricating medium. The two oil spray rings (2) are connected and connected through a reversing valve (6). The inlet end of the reversing valve (6) is connected and connected to a pump for pumping lubricating medium. The pressurizing pump (7), the oil injection ring (2) and the discharge hole (3) on the opposite side of the bearing are opened simultaneously. The sewage pump (5) is connected to and has a cooling mechanism (8) for cooling the lubricating medium. The pressurizing pump (7) is an air compressor pump. The air compressor pump is equipped with an air inlet end (71) and a lubricating oil inlet end (72). The air inlet end (71) is connected to an air inlet pipe (73) for conveying compressed air for filtering and drying. The lubricating oil inlet end (72) is connected to and has a connection with the oil outlet end of the existing lubricating oil station.

2. The bearing cooling device for a gas turbine according to claim 1, characterized in that: The bearing housing (1) includes a cylindrical body (13), with end caps (101) at both ends of the cylindrical body (13) for sealing. The bearing is placed in the center of the cylindrical body (13), and support rings (12) are provided on both sides of the bearing to restrict the sliding of the bearing. An oil injection ring (2) is provided between the support ring (12) and the end cap (101). A through hole (104) is provided on the side wall of the cylindrical body (13) at the location of the oil injection ring (2), and a discharge hole (3) is provided below the location where the support ring (12) is installed on the cylindrical body (13).

3. A bearing cooling device for a gas turbine according to claim 2, characterized in that: The cylinder (13) has a bearing mounting part (131) in the middle part, an oil injection ring mounting part (132) with a diameter larger than the bearing mounting part (131) on both sides of the bearing mounting part (131), and an end cap mounting part (133) with a diameter larger than the diameter of the oil injection ring mounting part (132) on the outermost side. The discharge hole (3) is opened on both sides of the bottom end of the bearing mounting part (131), and a collection cover (134) covering one side of the discharge hole (3) is provided at the bottom end of the bearing mounting part (131).

4. A bearing cooling device for a gas turbine according to claim 2 or 3, characterized in that: The oil injection ring (2) includes a cavity (201), and a spray hole (202) is provided on the end face of the cavity (201) near the bearing. A pipe connection port (203) is provided on one side of the cavity (201) and recessed into the cavity (201). The support ring (12) includes a contact ring (121) that contacts the end face of the bearing. A support rod (122) is fixedly installed on the end of the contact ring (121) away from the bearing. The support rod (122) passes through the cavity (201) and contacts the end cover (101). A positioning groove (123) for accommodating the support rod (122) is provided on the end of the end cover (101) near the bearing.

5. A bearing cooling device for a gas turbine according to claim 4, characterized in that: The inlet end of the reversing valve (6) is directly connected to the outlet end of the existing lubrication station.

6. A bearing cooling device for a gas turbine according to claim 4 or 5, characterized in that: Includes a temperature sensor (9) for detecting bearing temperature, the temperature sensor (9) controls the delivery efficiency of the pressurizing pump (7), and an air pressure detection unit (10) is provided on the outside of the bearing housing (1). The sewage pump (5) makes the air pressure inside the bearing housing (1) equal to the air pressure outside the bearing housing (1) based on the delivery efficiency of the pressurizing pump (7) and the delivery efficiency of the air pressure detection unit (10) and the data controller.

7. A bearing cooling device for a gas turbine according to claim 6, characterized in that: It includes a speed detection unit (11) for detecting the spindle speed, and the speed is positively correlated with the proportion of lubricating oil in the lubricating oil mist.

8. A bearing cooling device for a gas turbine according to claim 7, characterized in that: The cooling mechanism (8) is a liquid cooling mechanism or an air cooling mechanism, and the cooling mechanism (8) is installed inside the existing lubrication station.

9. A bearing cooling device for a gas turbine according to claim 7, characterized in that: The cooling mechanism (8) includes a cooling chamber (801), a filter element frame (802) is provided in the center of the cooling chamber (801), a filter element ring (803) is provided in the middle of the filter element frame (802), an induced draft fan (804) connected to the filter element frame (802) is installed above the cooling chamber (801), and a spray ring (805) with an outlet pointing to the filter element frame (802) is provided inside the cooling chamber (801). The spray ring (805) is connected to and passes through the sewage pump (5), and the spray ring (805) is located below the sewage pump (5). The cooling chamber (801) is provided with a cooling pipe (806) that is bent in the space at the lower part of the interior. The cooling chamber (801) temporarily stores lubricating oil. A liquid flow ring (807) is provided above the outer surface of the filter element frame (802). The liquid flow ring (807) pumps out the lubricating oil temporarily stored in the cooling chamber (801) and sprays it from top to bottom onto the filter element ring (803). A return pipe (808) connected to the existing lubricating oil pump station is provided at the bottom of the cooling chamber (801).

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