Automatic oiling device for sliding pin system of low-pressure cylinder of steam turbine

Abstract

The utility model discloses an automatic oiling device of a steam turbine low-pressure cylinder sliding pin system, which comprises an oiling assembly, an oiling main pipeline, a control console and a plurality of oiling branch pipelines, one end of each branch pipeline is simultaneously connected with a plurality of oiling nozzles, the other end of each branch pipeline is communicated with the oiling main pipeline, and the end part of the oiling main pipeline is communicated with the oiling assembly. The oiling assembly injects oil to the corresponding oiling nozzles through the oiling main pipeline and the oiling branch pipelines, the console is in data connection with the oiling branch pipelines and the oiling assembly, and the console controls on-off of the oiling branch pipelines and start and stop of the oiling assembly. According to the utility model, the oil injection nozzles on the low-pressure cylinder sliding pin system are grouped and connected with the oiling assembly by arranging the pipelines, and grouped sequential oiling of the oil injection nozzles is realized by controlling the opening and closing of the oil injection branch pipelines, so that the work of personnel is greatly reduced, the oil injection reliability of the low-pressure cylinder sliding pin system is ensured, and the oil injection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine equipment technology, specifically to an automatic lubrication device for the sliding pin system of a steam turbine low-pressure cylinder. Background Technology

[0002] Some domestically produced 600MW steam turbine generator units experience jamming in their low-pressure cylinder sliding pin system. This is particularly problematic in winter when a significant temperature difference exists between the low-pressure cylinder and the ambient environment. The differential expansion of the low-pressure cylinder frequently exceeds alarm values, sometimes approaching critical values. To ensure safe operation, on-site measures such as lowering reheat steam temperature and vacuum are necessary to reduce the differential expansion during operation, significantly compromising the unit's economic efficiency. The primary cause of this excessive differential expansion is jamming in the low-pressure cylinder sliding pin system. This problem can be resolved or alleviated by injecting oil into the low-pressure cylinder sliding pin system.

[0003] The domestically produced 600MW steam turbine generator set has two low-pressure outer cylinders of the same size. To ensure the expansion of the low-pressure outer cylinder, it is equipped with a sliding pin system and a special grease nipple for lubrication (the number of grease nipples for lubrication of the sliding pin system of a single low-pressure cylinder is 22 on each side and 14 at the front and rear, for a total of 72). The sliding pin system of the low-pressure outer cylinder needs to be lubricated regularly. Currently, it is basically done manually by injecting oil into the sliding pin system of the low-pressure cylinder one by one through the grease nipple. This not only wastes resources but also increases maintenance costs.

[0004] In view of the above-mentioned defects, the creator of this utility model has finally obtained this utility model after a long period of research and practice. Utility Model Content

[0005] To address the aforementioned technical deficiencies, the present invention provides an automatic oiling device for a turbine low-pressure cylinder sliding pin system. This device is used to inject oil into the turbine low-pressure cylinder sliding pin system. The turbine low-pressure cylinder sliding pin system includes several oil injection nozzles. The automatic oiling device includes an oiling assembly, a main oiling pipeline, a control console, and several branch oiling pipelines. One end of each branch pipeline is connected to multiple oil injection nozzles, and the other end is connected to the main oiling pipeline. The end of the main oiling pipeline is connected to the oiling assembly. The oiling assembly injects oil into the corresponding oil injection nozzles through the main oiling pipeline and the branch oiling pipelines. The control console is data-connected to the branch oiling pipelines and the oiling assembly, and controls the opening and closing of each branch oiling pipeline and the start and stop of the oiling assembly.

[0006] Preferably, each of the oil injection branch pipelines includes a main pipeline and branch pipelines. One end of the main pipeline is connected to the main oil injection pipeline, and the other end is connected to each of the oil injection nozzles through each of the branch pipelines.

[0007] Preferably, each main pipeline is equipped with an oil injection solenoid valve and a pressure transmitter. The oil injection solenoid valve is located between the pressure transmitter and the branch pipeline. Both the oil injection solenoid valve and the pressure transmitter are connected to the control console. The control console controls the opening and closing of the oil injection solenoid valve to obtain the oil injection pressure detected by the pressure transmitter.

[0008] Preferably, the main pipeline is further provided with a first isolation door and a second isolation door, and the oil injection solenoid valve is located between the first isolation door and the second isolation door.

[0009] Preferably, the same oil injection branch pipeline is connected to three or four adjacent oil injection nozzles through each of the branch pipelines.

[0010] Preferably, the control console is equipped with a control module, which is data-connected to the oil injection solenoid valve, the pressure transmitter, and the refueling assembly.

[0011] Preferably, the console is equipped with a display, and the control module is also data-connected to the first isolation door and the second isolation door, and the display is data-connected to the control module.

[0012] Preferably, the control panel may also be equipped with a main oil filling button and several branch control buttons. The main oil filling button is connected to the refueling component, and the branch control buttons are connected one-to-one with the oil filling solenoid valves of each of the oil filling branch pipelines.

[0013] Preferably, the refueling assembly includes a fuel pump and a fuel tank. The fuel tank is connected to the main fuel injection pipeline via the fuel pump. The fuel tank stores fuel. The fuel pump is connected to the main fuel injection button. A pressure relief valve is also provided on the main fuel injection pipeline, and the main fuel injection pipeline is connected to the fuel tank via the pressure relief valve.

[0014] Preferably, each of the branch pipes is also equipped with a flow meter, which is used to detect the amount of oil flowing into each of the oil inlets, and each of the flow meters is connected to the control module.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model connects each of the oil injection nozzles on the low-pressure cylinder sliding pin system to the oiling component by setting up pipelines, and realizes the sequential oiling of each of the oil injection nozzles by controlling the opening and closing of each of the oiling branch pipelines, which greatly reduces the workload of personnel, while ensuring the reliability of oiling of the low-pressure cylinder sliding pin system and improving the oiling efficiency. Attached Figure Description

[0016] Figure 1A schematic diagram of the automatic lubrication device for the low-pressure cylinder sliding pin system of the steam turbine.

[0017] Figure 2 This is a schematic diagram of the control connection structure of the console.

[0018] The numbers in the image represent:

[0019] 1-Oil injector; 2-Oil filling assembly; 3-Main oil filling pipeline; 4-Control console; 5-Oil filling branch pipeline; 6-Oil filling solenoid valve; 7-Pressure transmitter; 8-First isolation valve; 9-Second isolation valve; 10-Flow meter. Detailed Implementation

[0020] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0021] Example 1

[0022] like Figure 1 As shown, Figure 1 This is a schematic diagram of the automatic lubrication device for the low-pressure cylinder sliding pin system of the steam turbine.

[0023] The automatic oiling device for the low-pressure cylinder sliding pin system of a steam turbine, as described in this utility model, is used to inject oil into the low-pressure cylinder sliding pin system of a steam turbine. The low-pressure cylinder sliding pin system includes several oil injection nozzles 1. The automatic oiling device for the low-pressure cylinder sliding pin system includes an oiling assembly 2, an oil injection main pipeline 3, a control console 4, and several oil injection branch pipelines 5. One end of each branch pipeline is connected to multiple oil injection nozzles 1, and the other end is connected to the oil injection main pipeline 3. The end of the oil injection main pipeline 3 is connected to the oiling assembly 2. The oiling assembly 2 injects oil into the corresponding oil injection nozzles 1 through the oil injection main pipeline 3 and the oil injection branch pipelines 5. The control console 4 is data-connected to the oil injection branch pipelines 5 and the oiling assembly 2, and controls the opening and closing of each oil injection branch pipeline 5 and the start and stop of the oiling assembly 2 through the control console 4.

[0024] Specifically, each of the oil injection branch pipelines 5 includes a main pipeline and branch pipelines. One end of the main pipeline is connected to the main oil injection pipeline 3, and the other end is connected to each of the oil injection nozzles 1 through the branch pipelines, thereby realizing the simultaneous oil injection operation of multiple oil injection nozzles 1.

[0025] Each main pipeline is equipped with an oil injection solenoid valve 6 and a pressure transmitter 7. The oil injection solenoid valve 6 is located between the pressure transmitter 7 and the branch pipeline. Both the oil injection solenoid valve 6 and the pressure transmitter 7 are connected to the control console 4. The control console 4 controls the opening and closing of the oil injection solenoid valve 6 and obtains the oil injection pressure of the pressure transmitter 7, thereby enabling sequential oil injection into each of the oil injection branch pipelines 5.

[0026] The main pipeline is also equipped with a first isolation door 8 and a second isolation door 9. The oil injection solenoid valve 6 is located between the first isolation door 8 and the second isolation door 9. It is used to close the oil injection branch pipelines 5 on both sides of the oil injection solenoid valve 6 when the oil injection solenoid valve 6 needs to be replaced or maintained, so as to prevent oil leakage.

[0027] Preferably, the same oil injection branch pipe 5 is connected to three or four adjacent oil injection nozzles 1 through each of the branch pipes, thereby realizing sequential oil injection in multiple batches.

[0028] Both the main oil injection pipeline 3 and the branch oil injection pipeline 5 are made of stainless steel to improve their service life.

[0029] like Figure 2 As shown, Figure 2 This is a schematic diagram of the control connection structure of the control console 4. The control console 4 is equipped with a control module, which is data-connected to the oil injection solenoid valve 6, the pressure transmitter 7, and the refueling component 2. The control module can achieve automatic control through a control program within the chip. The control module has an oil injection pressure threshold. When oil is being injected into a certain oil injection branch pipe 5, if the oil injection pressure detected by the corresponding pressure transmitter 7 reaches the oil injection pressure threshold, the oil injection solenoid valve 6 on that oil injection branch pipe 5 is closed to stop oil injection, and the oil injection solenoid valve 6 on the next oil injection branch pipe 5 is opened, thereby realizing the automatic sequential oil injection operation of each oil injection branch pipe 5.

[0030] Generally, the control console 4 is equipped with a display, and the control module is also data-connected to the first isolation door 8 and the second isolation door 9. The display is data-connected to the control module to obtain the operating data of the first isolation door 8, the oil injection solenoid valve 6, the second isolation door 9, the pressure transmitter 7, and the refueling assembly 2, and displays this data on the display so that the operator can intuitively observe the operating status of each oil injection branch pipe 5 and the refueling assembly 2, facilitating real-time monitoring of the oil injection status. During fault maintenance, it is possible to directly observe which oil injection branch pipe 5 is malfunctioning, and to determine before maintenance whether the corresponding first isolation door 8 and second isolation door 9 are properly closed, ensuring smooth maintenance.

[0031] Preferably, the control console 4 may also be equipped with a main oil filling button and several branch control buttons. The main oil filling button is connected to the refueling component 2 to open and close the refueling component 2 for oil filling operation. The branch control buttons are connected one-to-one with the oil filling solenoid valves 6 of each oil filling branch pipeline 5 to open and close each oil filling solenoid valve 6, so that oil filling of each oil filling branch pipeline 5 can be performed sequentially by manual control.

[0032] Preferably, the refueling component 2 includes a fuel pump and a fuel tank. The fuel tank is connected to the main fuel injection pipeline 3 via the fuel pump. The fuel tank stores fuel. The fuel pump provides power to transport the fuel in the fuel tank to the main fuel injection pipeline 3 to supply each of the fuel injectors 1. The fuel pump is connected to the main fuel injection button to enable the control console 4 to control the fuel pump.

[0033] Generally, a pressure relief valve is also installed on the main oil injection pipeline 3. The main oil injection pipeline 3 is connected to the oil tank through the pressure relief valve to prevent excessive oil pressure in the main oil injection pipeline 3 from causing safety accidents and to ensure stable oil pressure in the main oil injection pipeline 3.

[0034] Preferably, each of the branch pipes is also equipped with a flow meter 10, which is used to detect the amount of oil flowing into each of the oil injection nozzles 1. Each of the flow meters 10 is connected to the control module, and the control module can obtain the amount of oil injected into each of the oil injection nozzles 1 during the oil injection process based on the flow meter 10 and display it through the display.

[0035] When the pressure transmitter 7 malfunctions and the value is abnormal, the control module can also automatically close the corresponding oil injection solenoid valve 6 based on the amount of oil injected, or the operator can manually close the corresponding oil injection solenoid valve 6 through the branch control button after observing the amount of oil injected in real time on the display, so as to avoid oil injection accidents.

[0036] This invention connects each of the oil injection nozzles 1 on the low-pressure cylinder sliding pin system to the oiling assembly 2 through pipelines. By controlling the opening and closing of each of the oil injection branch pipelines 5, oil can be injected into each of the oil injection nozzles 1 in groups in sequence, which greatly reduces the workload of personnel, while also ensuring the reliability of oil injection in the low-pressure cylinder sliding pin system and improving the oil injection efficiency.

[0037] Example 2

[0038] In this embodiment, the number of oil nozzles 1 for refueling a single low-pressure cylinder sliding pin system is 22 on each side and 14 at the front and back, for a total of 72. Each unit has 2 low-pressure cylinders. The refueling assembly 2 and the control console 4 are installed at appropriate positions next to each low-pressure cylinder sliding pin system. They are connected to the oil nozzles 1 for refueling the low-pressure cylinder sliding pin system using stainless steel pipes. Every 3 to 4 oil nozzles 1 form a group. An isolation door, solenoid valve, pressure transmitter 7, etc. are installed on the pipe in front of each group of oil nozzles 1 to realize the automatic oiling function. Normally, all solenoid valves are closed. Only when oil needs to be injected into the low-pressure cylinder sliding pin system can the oil injection operation be performed group by group via the control panel 4 (automatic oil injection can also be achieved by adding an oil injection program setting). When the first set of oil injection nozzles 1 is ready for oil injection, the first set of oil injection solenoid valves 6 is opened, activating the oil injection pump of the oil filling component 2. When the pressure at the first set of oil injection solenoid valves 6 reaches 0.5 MPa (the pressure is adjustable according to the oil injection situation), the solenoid valve before that set of oil injection nozzles 1 automatically closes (it can also be manually closed). Simultaneously, the second set of oil injection solenoid valves 6 automatically opens, initiating the oil injection work for the second set of oil injection nozzles 1. This process continues until all oil injection work is completed. The use of this equipment greatly reduces the workload of personnel and ensures the reliability of oil injection into the low-pressure cylinder sliding pin system.

[0039] The above description is merely a preferred embodiment of the present utility model and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present utility model, all of which will fall within the protection scope of the present utility model.

Claims

1. An automatic lubrication device for a low-pressure cylinder sliding pin system of a steam turbine, used for lubricating the low-pressure cylinder sliding pin system of a steam turbine, the low-pressure cylinder sliding pin system of the steam turbine comprising a plurality of lubrication nozzles, characterized in that, The system includes a refueling assembly, a main refueling pipeline, a control console, and several branch refueling pipelines. One end of each branch refueling pipeline is connected to multiple refueling nozzles, and the other end is connected to the main refueling pipeline. The end of the main refueling pipeline is connected to the refueling assembly. The refueling assembly refuels the corresponding refueling nozzles through the main refueling pipeline and the branch refueling pipelines. The control console is data-connected to the branch refueling pipelines and the refueling assembly, and controls the opening and closing of each branch refueling pipeline and the start and stop of the refueling assembly.

2. The automatic lubrication device for the low-pressure cylinder sliding pin system of a steam turbine as described in claim 1, characterized in that, Each of the oil injection branch pipelines includes a main pipeline and branch pipelines. One end of the main pipeline is connected to the main oil injection pipeline, and the other end is connected to each of the oil injection nozzles through each of the branch pipelines.

3. The automatic lubrication device for the low-pressure cylinder sliding pin system of a steam turbine as described in claim 2, characterized in that, Each main pipeline is equipped with an oil injection solenoid valve and a pressure transmitter. The oil injection solenoid valve is located between the pressure transmitter and the branch pipeline. Both the oil injection solenoid valve and the pressure transmitter are connected to the control console. The control console controls the opening and closing of the oil injection solenoid valve and obtains the oil injection pressure detected by the pressure transmitter.

4. The automatic lubrication device for the low-pressure cylinder sliding pin system of a steam turbine as described in claim 3, characterized in that, The main pipeline is also equipped with a first isolation door and a second isolation door, and the oil injection solenoid valve is located between the first isolation door and the second isolation door.

5. The automatic lubrication device for the low-pressure cylinder sliding pin system of a steam turbine as described in claim 2, characterized in that, Each of the aforementioned oil injection branch pipes is connected to three or four adjacent oil injection nozzles via its respective branch pipe.

6. The automatic lubrication device for the low-pressure cylinder sliding pin system of a steam turbine as described in claim 4, characterized in that, The control console is equipped with a control module, which is connected to the oil injection solenoid valve, the pressure transmitter, and the refueling assembly.

7. The automatic lubrication device for the low-pressure cylinder sliding pin system of a steam turbine as described in claim 6, characterized in that, The console is equipped with a display, and the control module is also connected to the first isolation door and the second isolation door via data connection. The display is also connected to the control module via data connection.

8. The automatic lubrication device for the low-pressure cylinder sliding pin system of a steam turbine as described in claim 7, characterized in that, The control panel can also be equipped with a main oil filling button and several branch control buttons. The main oil filling button is connected to the refueling component, and the branch control buttons are connected one-to-one with the oil filling solenoid valves of each of the oil filling branch pipelines.

9. The automatic lubrication device for the low-pressure cylinder sliding pin system of a steam turbine as described in claim 8, characterized in that, The refueling assembly includes a fuel pump and a fuel tank. The fuel tank is connected to the main fuel injection pipeline via the fuel pump. The fuel tank stores fuel. The fuel pump is connected to the main fuel injection button. A pressure relief valve is also installed on the main fuel injection pipeline, which is connected to the fuel tank via the pressure relief valve.

10. The automatic lubrication device for the low-pressure cylinder sliding pin system of a steam turbine as described in claim 8, characterized in that, Each of the branch pipes is also equipped with a flow meter, which is used to detect the amount of oil flowing into each of the oil inlets, and each of the flow meters is connected to the control module.

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