Gas turbine generator set lubricating oil cooling device and gas turbine lubricating oil system

Abstract

The utility model discloses a gas turbine generator set lubricating oil cooling device and gas turbine lubricating oil system belongs to gas turbine technical field, and the device is through the cooler for cooling lubricating oil is located between the air inlet of gas turbine's air inlet end, when gas turbine operates, will inhale cold air through the air inlet of casing, and cold air enters the casing from the casing inlet, and enters the gas turbine through the air inlet end of gas turbine, and when cold air moves from the air inlet to the air inlet end of gas turbine, will pass through the cooler, and the heat exchange of lubricating oil and cold air in cooler is realized through the contact of cold air and cooler, and the cold air in the gas turbine is used to cool lubricating oil, and the cold air in the gas turbine is fully utilized, and the cold air is preheated, and the active cooling equipment or cooling circuit need not to be additionally arranged, so that the gas turbine generator set lubricating oil cooling device is more simple, and energy saving and emission reduction are simultaneously realized, and the maintenance cost in later period is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gas turbine technology, specifically to a gas turbine generator set lubricating oil cooling device and a gas turbine lubricating oil system. Background Technology

[0002] Currently, the lubricating oil system used in gas turbines typically includes an oil tank, an electric booster pump, an onboard pump, an oil filter, and a cooler. The lubricating oil in the oil tank passes sequentially through the electric booster pump, the onboard pump, and the oil filter before entering the various bearings of the gas turbine. The lubricating oil returns to the oil tank after passing through the oil cooler, thus achieving lubricating oil circulation. Some lubricating oil systems do not have a booster pump but instead use a high-level oil tank, where the oil level is higher than the gas turbine centerline or the onboard pump inlet, which also achieves lubricating oil circulation.

[0003] In current lubricating oil systems, coolers are typically cooled by fans. A fan is installed on the cooler to blow air into it, thereby cooling the lubricating oil inside. Because lubricating oil systems have high heat dissipation requirements, large-volume, high-power fans are needed, resulting in a large lubricating oil system size and significant limitations in its layout.

[0004] Based on this, the present invention designs a gas turbine generator set lubricating oil cooling device and a gas turbine lubricating oil system to solve the above problems. Utility Model Content

[0005] This invention provides a lubricating oil cooling device and a lubricating oil system for gas turbine generator sets, in order to solve the technical problem that existing lubricating oil systems require the installation of a fan on the cooler to cool the lubricating oil.

[0006] According to one aspect of the present invention, a lubricating oil cooling device for a gas turbine generator set is provided, which is installed on a gas turbine generator set to cool the lubricating oil circulating inside the gas turbine. The gas turbine generator set includes a housing and a gas turbine, the gas turbine being disposed inside the housing. The housing has an air inlet and an exhaust outlet. The lubricating oil cooling device for the gas turbine generator set includes a cooler. The cooler is disposed between the air inlet end of the gas turbine and the air inlet, and the cooler is connected to the lubricating oil system of the gas turbine so that the lubricating oil inside the gas turbine exchanges heat with the air entering the housing when it passes through the cooler.

[0007] As a further embodiment of this utility model, the gas turbine generator set also includes a generator, which is located between the gas turbine's air inlet and air intake. The cooler is located between the outer surface of the generator and the inner wall of the housing, and the cooler has a partition on its side. The partition is used to seal the gap between the inner wall of the housing and the cooler, as well as the gap between the inner wall of the housing and the generator.

[0008] As a further embodiment of this invention, the cooler and baffle are disposed at one end of the generator near the gas turbine.

[0009] As a further embodiment of this utility model, the cooler is arranged at intervals relative to the gas turbine along the length direction of the gas turbine, and the distance between the cooler and the gas turbine is not less than 1m.

[0010] As a further embodiment of this utility model, a contour plate is fixedly connected to the bottom of the cooler, the contour plate is used to be fixedly connected to the generator, the partition is fixedly arranged on the side of the cooler, and the edge of the partition away from the cooler is used to be fixedly connected to the inner wall of the shell.

[0011] A gas turbine lubricating oil system includes the aforementioned gas turbine generator set lubricating oil cooling device.

[0012] As a further embodiment of this utility model, the gas turbine lubricating oil system includes an oil tank and a gas turbine lubricating oil module. The first end of the oil tank is connected to the input end of the gas turbine lubricating oil module, the output end of the gas turbine lubricating oil module is connected to the input end of a cooler, and the output end of the cooler is connected to the input end of the gas turbine lubricating oil module.

[0013] As a further embodiment of this utility model, an oil-gas separator is provided between the output end of the gas turbine lubricating oil module and the input end of the cooler. The output end of the gas turbine lubricating oil module is connected to the input end of the oil-gas separator. The first output end of the oil-gas separator is connected to the input end of the cooler for sending lubricating oil into the cooler. The second output end of the oil-gas separator is connected to the second end of the lubricating oil tank for sending oil mist into the lubricating oil tank.

[0014] As a further embodiment of this utility model, the input end and the output end of the cooler are both located at the top of the side of the cooler, in order to prevent the lubricating oil in the cooler from entering the oil-gas separator or the gas turbine lubricating oil module after the machine is stopped.

[0015] As a further embodiment of this utility model, the top of the lubricating oil tank is provided with an ejector pipe, and the end of the ejector pipe away from the lubricating oil tank is connected to the exhaust end of the gas turbine.

[0016] This utility model has the following beneficial effects:

[0017] This device places a cooler for cooling the lubricating oil between the gas turbine's inlet and outlet. During gas turbine operation, cold air is drawn in through the casing's inlet. This cold air enters the casing through the inlet and then flows into the gas turbine through its inlet. As the cold air moves from the inlet to the gas turbine's inlet, it passes through the cooler. Heat exchange occurs between the lubricating oil and the cooler, utilizing the incoming cold air to cool the lubricating oil. This fully utilizes and preheats the incoming cold air, eliminating the need for additional active cooling equipment or cooling circuits. This simplifies the gas turbine generator set's lubricating oil cooling system, saving energy and reducing emissions, while also lowering subsequent maintenance costs.

[0018] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the airflow direction in the medium of this utility model;

[0022] Figure 3 This is a schematic diagram of the generator and gas turbine structure in this utility model;

[0023] Figure 4 This is a schematic diagram of the gas turbine lubricating oil system in this utility model.

[0024] Legend:

[0025] 1. Cooler; 11. Baffle; 12. Profile plate; 2. Shell; 21. Air inlet; 22. Exhaust outlet; 3. Gas turbine; 4. Generator; 51. Oil tank; 52. Gas turbine oil module; 521. Main oil pump; 522. Auxiliary oil pump; 53. Oil-gas separator; 54. Ejector pipeline. Detailed Implementation

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0027] Please see Figure 1-4This utility model provides a technical solution: a lubricating oil cooling device for a gas turbine generator set, used to be installed on a gas turbine generator set to cool the lubricating oil circulating inside the gas turbine. The gas turbine generator set includes a housing 2 and a gas turbine 3, with the gas turbine 3 disposed inside the housing 2. The housing 2 has an air inlet 21 and an exhaust outlet 22. The lubricating oil cooling device for the gas turbine generator set includes a cooler 1. The cooler 1 is disposed between the air inlet end of the gas turbine 3 and the air inlet 21, and the cooler 1 is connected to the lubricating oil system of the gas turbine 3 so that the lubricating oil in the gas turbine 3 exchanges heat with the air entering the housing 2 when it passes through the cooler 1.

[0028] During operation, the lubricating oil circulating in the lubricating oil system of the gas turbine 3 passes through the cooler 1, and the gas turbine 3 draws in cold air through the intake end. The outside cold air enters the casing 2 through the intake port 21 and is then drawn into the gas turbine 3. Since the cooler 1 is located between the intake end of the gas turbine 3 and the intake port 21, the cold air enters the casing 2 through the intake port 21 and passes through the cooler 1 before being drawn into the gas turbine 3. When the cold air passes through the cooler 1, it exchanges heat with the high-temperature lubricating oil in the cooler 1 to remove the heat from the lubricating oil and cool down the lubricating oil in the cooler 1, thereby cooling down the lubricating oil in the lubricating oil system of the gas turbine 3. The cold air enters the gas turbine 3 after passing through the cooler 1.

[0029] By placing the cooler 1, which is used to cool the lubricating oil in the lubricating oil system of the gas turbine 3, between the air inlet end of the gas turbine 3 and the air inlet 21 of the casing 2, when the gas turbine 3 is running, it will draw in cold air through the air inlet 21 of the casing 2. The cold air enters the casing 2 from the inlet of the casing 2 and enters the gas turbine 3 through the air inlet end of the gas turbine 3. When the cold air moves from the air inlet 21 to the air inlet end of the gas turbine 3, it will pass through the cooler 1. The cold air contacts the cooler 1 to achieve heat exchange between the lubricating oil in the cooler 1 and the cold air. The cold air entering the gas turbine 3 is used to cool the lubricating oil. The cold air entering the gas turbine 3 is fully utilized and preheated. There is no need to set up additional active cooling equipment or cooling circuits, which makes the lubricating oil cooling device of the gas turbine generator set more streamlined, saves energy and reduces emissions, and reduces the later maintenance costs.

[0030] Furthermore, the gas turbine generator set also includes a generator 4, which is located between the gas turbine 3's air inlet and the air inlet 21, and a cooler 1 is located between the outer surface of the generator 4 and the inner wall of the casing 2.

[0031] A generator 4 and a cooler 1 are installed between the air inlet of the gas turbine 3 and the air inlet 21 of the casing 2. The generator 4 needs to be coaxially mounted with the gas turbine 3. Therefore, the generator 4 needs to be installed directly in front of the gas turbine 3. When the gas turbine 3 is working, the cold air entering from the air inlet 21 of the casing 2 will also pass through the generator 4, thereby carrying away the heat generated by the generator 4 during operation. In order to ensure the cooling effect of the cold air on the lubricating oil in the cooler 1 and the generator 4, the cooler 1 is installed between the outer surface of the generator 4 and the inner wall of the casing 2. Thus, after the cold air enters the casing 2, it will be divided into two streams that pass through the generator 4 and the cooler 1 respectively, cooling the lubricating oil in the generator 4 and the cooler 1 respectively, thereby ensuring the cooling effect of the cold air on the lubricating oil in the generator 4 and the cooler 1.

[0032] like Figure 1 As shown, in this example, the height of the housing 2 is higher than that of the generator 4. After the generator 4 is placed inside the housing 2, there is a large gap between the top of the generator 4 and the housing 2. The cooler 1 is installed on the top of the generator 4. At this time, after the cold air enters the housing 2 from the air inlet 21, it will be divided into two streams, which pass through the generator 4 and the cooler 1 respectively, and cool the lubricating oil in the cooler 1 and the generator 4 respectively.

[0033] Furthermore, a partition 11 is provided on the side of the cooler 1, which is used to seal the gap between the inner wall of the housing 2 and the cooler 1 and the generator 4.

[0034] To facilitate installation, disassembly, and subsequent maintenance, there will be a gap between the inner wall of the housing 2 and the generator 4 and the cooler 1. The partition 11 is designed according to the gap between the inner wall of the housing 2 and the generator 4 and the cooler 1 to seal the gap between the inner wall of the housing 2 and the generator 4 and the cooler 1, so that more cold air can pass through the cooler 1 and the generator 4, thereby improving the cooling effect of the cold air on the lubricating oil in the cooler 1 and the generator 4, preventing cold air from passing through the side of the generator 4 or the cooler 1, and improving the utilization rate of cold air.

[0035] like Figure 1 As shown, the partition 11 does not need to be completely attached to the surface of the generator 4 or the cooler 1. There can be some gaps between the partition 11 and the generator 4, the cooler 1 and the housing 2. As long as the partition 11 can seal most of the area between the inner wall of the housing 2 and the generator 4 and the cooler 1, the production and installation difficulty of the partition 11 can be reduced.

[0036] Specifically, the cooler 1 and the baffle are installed at one end of the generator 4 near the gas turbine 3;

[0037] like Figure 1As shown, in this example, the air intake end of the generator 4 is located on the top surface of the generator 4 away from the gas turbine 3. In order to prevent the partition 11 and the cooler 1 from blocking the air intake end of the generator 4, the cooler 1 and the partition 11 are set at the end of the generator 4 close to the gas turbine 3.

[0038] Furthermore, the cooler 1 is arranged at intervals relative to the gas turbine 3 along the length direction of the gas turbine 3, and the distance between the cooler 1 and the gas turbine 3 is not less than 1m;

[0039] like Figure 2 As shown, the distance between the cooler 1 and the gas turbine 3 is not less than 1m, which is a space for the cold air passing through the cooler 1 and the cold air passing through the generator 4 to mix, so that the two streams of cold air can be fully mixed, and the temperature and pressure of the cold air passing through the cooler 1 and the generator 4 are closer, thereby improving the pressure and temperature uniformity of the gas turbine 3 intake.

[0040] Specifically, a contour plate 12 is fixedly connected to the bottom of the cooler 1. The contour plate 12 is used to be fixedly connected to the generator 4. The partition plate 11 is fixedly installed on the side of the cooler 1, and the edge of the partition plate 11 away from the cooler 1 is used to be fixedly connected to the inner wall of the housing 2.

[0041] The profile plate 12 is used to be placed between the generator 4 and the cooler 1 to seal the gap between the generator 4 and the cooler 1, while allowing the cooler 1 to be stably installed on the generator 4.

[0042] like Figure 1 As shown, when the gas turbine 3 is working, the air pressure on the side of the cooler 1 and the baffle 11 facing the air inlet 21 will be greater than the air pressure on the side of the cooler 1 and the baffle 11 facing the gas turbine 3. At this time, the side of the cooler 1 and the baffle 11 facing the air inlet 21 will be subjected to greater pressure. In order to ensure the stability of the cooler 1 and the baffle 11 during use, a contour plate 12 is fixedly connected to the bottom end of the cooler 1. The contour plate 12 matches the shape of the outer surface of the generator 4 and is used to fix it to the generator 4. The baffle 11 is fixedly connected to the side of the cooler 1, and the side of the baffle 1 away from the cooler 1 is fixedly connected to the housing 2. The cooler 1, the contour plate 12 and the baffle 11 are completely fixed, which can ensure the stability of the cooler 1 and the baffle 11 during use and reduce the vibration of the cooler 1 and the baffle 11.

[0043] A gas turbine lubricating oil system includes the aforementioned gas turbine generator set lubricating oil cooling device, which can simplify the overall lubricating oil system, save energy and reduce emissions, and reduce subsequent maintenance costs.

[0044] Specifically, such as Figure 4As shown, the gas turbine lubricating oil system includes an oil tank 51 and a gas turbine lubricating oil module 52. The first end of the oil tank 51 is connected to the input end of the gas turbine lubricating oil module 52, the output end of the gas turbine lubricating oil module 52 is connected to the input end of the cooler 1, and the output end of the cooler 1 is connected to the input end of the gas turbine lubricating oil module 52.

[0045] During operation, the lubricating oil in the lubricating oil tank 51 exits from the first end of the lubricating oil tank 51, and then enters the gas turbine lubricating oil module 52 from the input end of the gas turbine lubricating oil module 52 to lubricate and cool the components in the gas turbine 3 that require lubrication. Afterwards, the lubricating oil is discharged from the output end of the gas turbine lubricating oil module 52 and enters the cooler 1 from the input end of the cooler 1. After being cooled by the cooler 1, the lubricating oil is discharged from the output end of the cooler 1 and re-enters the gas turbine 3 lubricating oil system from the input end of the gas turbine 3 lubricating oil system. At this time, the lubricating oil tank 51 is used to replenish the lubricating oil consumed in the gas turbine 3 lubricating oil system.

[0046] In this example, the lubricating oil discharged from the output end of the gas turbine lubricating oil module 52 passes through the cooler 1 and then re-enters the gas turbine lubricating oil module 52 from the input end. The lubricating oil tank 51 is used to replenish the lubricating oil system of the gas turbine 3, so that the lubricating oil system of the gas turbine 3 and the cooler 1 form a closed loop. The amount of lubricating oil added at one time and the total amount of lubricating oil stored are reduced, which can reduce the total weight of the unit.

[0047] Specifically, such as Figure 4 As shown, the power for the circulation of lubricating oil in the gas turbine lubricating oil module 52 comes from the main lubricating oil pump 521. An auxiliary lubricating oil pump 522 is provided between the lubricating oil tank 51 and the main lubricating oil pump 521. The auxiliary lubricating oil pump 522 pressurizes the lubricating oil in the lubricating oil tank 51 and sends it into the main lubricating oil pump 521.

[0048] Furthermore, an oil-gas separator 53 is provided between the output end of the gas turbine lubricating oil module 52 and the input end of the cooler 1. The output end of the gas turbine lubricating oil module 52 is connected to the input end of the oil-gas separator 53. The first output end of the oil-gas separator 53 is connected to the input end of the cooler 1 for sending lubricating oil into the cooler 1. The second output end of the oil-gas separator 53 is connected to the second end of the lubricating oil tank 51 for sending oil mist into the lubricating oil tank 51.

[0049] When the lubricating oil circulates in the gas turbine lubricating oil module 52, it generates oil mist. Therefore, the output end of the gas turbine lubricating oil module 52 is connected to the input end of the oil-gas separator 53. The oil-gas separator 53 separates the lubricating oil from the oil mist. The separated lubricating oil enters the cooler 1 from the first end of the oil-gas separator 53, while the oil mist returns to the lubricating oil tank 51 from the second end of the oil-gas separator 53. This separates the lubricating oil from the oil mist and prevents the oil mist from re-entering the gas turbine lubricating oil module 52.

[0050] Furthermore, the input and output ends of the cooler 1 are both located at the top of the side of the cooler 1 to prevent the lubricating oil in the cooler 1 from entering the oil-gas separator 53 or the gas turbine lubricating oil module 52 after shutdown.

[0051] When the gas turbine 3 is shut down, the lubricating oil in the lubricating oil system will stop running. By setting both the input and output ends of the cooler 1 at the top of the side of the cooler 1, the lubricating oil in the cooler 1 can be prevented from leaving the cooler 1 from the input or output ends after the gas turbine 3 is shut down. There is no need to set up valves to control the flow direction of the lubricating oil in the cooler 1.

[0052] Furthermore, the top of the lubricating oil tank 51 is provided with an ejector pipe 54, and the end of the ejector pipe 54 away from the lubricating oil tank 51 is connected to the exhaust end of the gas turbine 3.

[0053] The high-speed airflow at the exhaust end of the gas turbine 3 guides the oil mist in the lubricating oil tank 51 to the exhaust end of the gas turbine 3, thereby discharging the oil mist from the lubricating oil tank 51. At the same time, the oil mist can be directly burned after being guided to the exhaust end of the gas turbine 3, without the need for additional oil mist separation treatment or the installation of an additional oil mist separator to treat the oil mist in the lubricating oil tank 51. This further simplifies the gas turbine lubricating oil system and reduces subsequent maintenance costs.

[0054] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0055] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

Claims

1. A lubricating oil cooling device for a gas turbine generator set, used to be installed on a gas turbine generator set to cool the lubricating oil circulating inside the gas turbine, the gas turbine generator set including a housing (2) and a gas turbine (3), the gas turbine (3) being disposed inside the housing (2), the housing (2) having an air inlet (21) and an exhaust outlet (22), characterized in that: The lubricating oil cooling device for the gas turbine generator set includes a cooler (1); The cooler (1) is used to be located between the air inlet end and the air inlet (21) of the gas turbine (3), and the cooler (1) is used to be connected to the lubricating oil system of the gas turbine (3) so that the lubricating oil in the gas turbine (3) exchanges heat with the air entering the casing (2) when it passes through the cooler (1).

2. The lubricating oil cooling device for a gas turbine generator set according to claim 1, characterized in that: The gas turbine generator set also includes a generator (4), which is located between the gas turbine (3) and the air inlet (21). The cooler (1) is located between the outer surface of the generator (4) and the inner wall of the housing (2). The side of the cooler (1) is provided with a partition (11), which is used to seal the gap between the inner wall of the housing (2) and the cooler (1) as well as the gap between the inner wall of the housing (2) and the generator (4).

3. The lubricating oil cooling device for a gas turbine generator set according to claim 2, characterized in that: The cooler (1) and the baffle are to be located at one end of the generator (4) near the gas turbine (3).

4. The lubricating oil cooling device for a gas turbine generator set according to claim 1, characterized in that: The cooler (1) is arranged at intervals relative to the gas turbine (3) along the length direction of the gas turbine (3) and the distance between the cooler (1) and the gas turbine (3) is not less than 1m.

5. The lubricating oil cooling device for a gas turbine generator set according to claim 2, characterized in that: The bottom end of the cooler (1) is fixedly connected to a contour plate (12), which is used to be fixedly connected to the generator (4). The partition plate (11) is fixedly installed on the side of the cooler (1), and the edge of the partition plate (11) away from the cooler (1) is used to be fixedly connected to the inner wall of the shell (2).

6. A gas turbine lubricating oil system, characterized in that: Includes the lubricating oil cooling device for gas turbine generator sets as described in any one of claims 1-5.

7. A gas turbine lubricating oil system according to claim 6, characterized in that: The gas turbine lubricating oil system includes an oil tank (51) and a gas turbine lubricating oil module (52). The first end of the oil tank (51) is connected to the input end of the gas turbine lubricating oil module (52). The output end of the gas turbine lubricating oil module (52) is connected to the input end of the cooler (1). The output end of the cooler (1) is connected to the input end of the gas turbine lubricating oil module (52).

8. A gas turbine lubricating oil system according to claim 7, characterized in that: An oil-gas separator (53) is provided between the output end of the gas turbine lubricating oil module (52) and the input end of the cooler (1). The output end of the gas turbine lubricating oil module (52) is connected to the input end of the oil-gas separator (53). The first output end of the oil-gas separator (53) is connected to the input end of the cooler (1) for sending lubricating oil into the cooler (1). The second output end of the oil-gas separator (53) is connected to the second end of the lubricating oil tank (51) for sending oil mist into the lubricating oil tank (51).

9. A gas turbine lubricating oil system according to claim 8, characterized in that: The input and output ends of the cooler (1) are both located at the top of the side of the cooler (1) to prevent the lubricating oil in the cooler (1) from entering the oil-gas separator (53) or the gas turbine lubricating oil module (52) after the machine stops.

10. A gas turbine lubricating oil system according to claim 7, characterized in that: The top of the lubricating oil tank (51) is provided with an ejector pipe (54), and the end of the ejector pipe (54) away from the lubricating oil tank (51) is connected to the exhaust end of the gas turbine (3).

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