Temporary jacking oil system

Abstract

The utility model discloses a temporary jacking oil system which comprises a main oil tank, an oil inlet pipeline, an oil filter, a jacking oil pump, an oil collecting tank, an oil return pipeline and an oil return pipeline. The oil inlet pipeline is connected between the main oil tank and the steam turbine generator, and the oil filter and the jacking oil pump are arranged on the oil inlet pipeline; the oil return pipeline is connected between the steam turbine generator and the oil collecting tank, and the oil return pipeline is connected between the oil collecting tank and the main oil tank. The temporary jacking oil system provided by the utility model is suitable for the installation stage of a steam turbine, and provides high-pressure jacking oil to jack up a rotor, so that the conditions of rotor disc rotation and shafting centering are met, and the purpose of optimizing the installation period is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine generator installation, in particular to a temporary jacking oil system. Background Art

[0002] During the installation phase of the steam turbine generator, the shaft system is aligned throughout the entire installation process. The rotor (shaft system) is positioned by adjusting the bearing shell or bearing box, and the rotor is positioned in the inner cylinder. The first condition for the alignment of the shaft system (rotor) is the use of jacking oil. The jacking oil is used to lift the rotor and continuously rotate it to eliminate the transient bending caused by long-term storage of the rotor, and the rotor is adjusted to meet the design requirements. However, the formal lubrication jacking oil system is usually affected by the slow construction of the plant structure and the installation logic, and is put into use later, which has a greater impact on the main line of the steam turbine generator installation.

[0003] The installation cycle of the steam turbine lubrication, jacking and turning system is relatively long. The prerequisite for installation is that the lubricating oil chamber and the steel structure and platform on the formal pipeline path are in place. Usually, the progress of civil construction is delayed, resulting in a late delivery time. This further widens the contradiction between the installation of the steam turbine generator and the demand for the commissioning of the jacking oil. In addition, the formal system commissioning cycle is relatively long. Among them, the early commissioning after the jacking oil is flushed is a necessary condition for the installation of the steam turbine body. Whether the oil flushing is qualified is an important prerequisite for the availability of the system. The main solution currently implemented is to set up only a temporary oil tank and oil filter. On the premise that the formal jacking oil management and flushing are qualified, the oil filter is used to filter the oil from the main oil tank to the temporary oil tank, and then the formal jacking oil pump is used to take oil from the temporary oil tank. After the pressure is increased, it is transported to each supporting bearing through the formal oil pipeline to meet the conditions for manual turning of the jacking rotor.

[0004] According to the installation logic of the steam turbine generator, in preparation for the turbine cylinder buckling and in line with the installation requirements of the turbine body, the jacking oil system needs to be put into use in advance. For this reason, the jacking oil flushing is carried out before the lubricating oil flushing. After the jacking oil is put into use, the installation and commissioning need to be carried out alternately. In order to shorten the total construction period of installation and commissioning, the jacking oil putting into use and the lubricating oil flushing are separated.

[0005] In order to ensure the internal cleanliness of the equipment during the flushing and commissioning of the top shaft oil pump, a temporary oil tank is installed on the operating floor platform of the turbine plant as the oil suction port of the top shaft oil pump. The oil tank capacity is about 10m 3 The temporary oil filter is used to take oil from the main oil tank and add it to the temporary oil tank. The temporary oil filter has filtering and water removal functions. The system's formal jacking oil pump draws oil from the temporary oil tank through a temporary pipeline, and then performs a jacking oil system pipeline flushing cycle, and then returns to the main oil tank through the set oil return pipe.

[0006] The existing solutions have the following problems:

[0007] It relies heavily on formal equipment and formal piping systems. The installation and debugging of formal systems are labor-intensive and cannot meet the installation requirements of the main line of steam turbine generators. It mainly uses formal systems. In order to ensure the safety of formal systems, system operations must be performed by professional operation or debugging departments. The related start and stop procedures are complicated, and the work permit process is long. The installation of the steam turbine body requires the cooperation of the top shaft oil system, and cross-influences the subsequent flushing of the lubricating oil inlet and return pipelines of the lubricating oil system, which prolongs the total construction period of the oil flushing. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide a temporary jacking oil system.

[0009] The utility model solves the technical problem by adopting the following technical solution: providing a temporary jacking oil system, including a main oil tank, an oil inlet pipeline, an oil filter, a jacking oil pump, an oil collecting tank, an oil return pipeline and an oil return line;

[0010] The oil inlet pipeline is connected between the main oil tank and the steam turbine generator, and the oil filter and the top shaft oil pump are arranged on the oil inlet pipeline; the oil return pipeline is connected between the steam turbine generator and the oil collecting tank, and the oil return pipeline is connected between the oil collecting tank and the main oil tank.

[0011] Preferably, the oil filter is a duplex oil filter.

[0012] Preferably, a first pressure detection device and a second pressure detection device are provided on the oil inlet pipeline, and the first pressure detection device and the second pressure detection device are respectively located at the inlet end and the outlet end of the jacking oil pump on the oil inlet pipeline.

[0013] Preferably, the oil return pipeline includes an oil return pipe and a first oil filter arranged on the oil return pipe.

[0014] Preferably, the oil return pipeline further includes a first heat exchanger arranged on the oil return pipeline.

[0015] Preferably, the first heat exchanger is an air cooler.

[0016] Preferably, the temporary jacking oil system further comprises an oil supply pipeline connected to the main oil tank.

[0017] Preferably, the oil supply line includes an oil supply pipeline connected between the oil barrel and the main oil tank, and a second oil filter arranged on the oil supply pipeline.

[0018] Preferably, the temporary jacking oil system further comprises an overflow pipe connected between the jacking oil pump and the main oil tank.

[0019] Preferably, a second heat exchanger is provided on the overflow pipe.

[0020] The temporary jacking oil system of the utility model is suitable for the installation stage of the steam turbine, and provides high-pressure jacking oil to jack up the rotor, thereby meeting the conditions for the rotor disk rotation and the shaft system centering, and achieving the purpose of optimizing the installation period. The temporary jacking oil system is not a formal engineering system, and is easy to install and has a short commissioning period, which can meet the installation requirements. On the other hand, it completely decouples the installation and commissioning of the formal system from the installation of the steam turbine body, and completely eliminates the cross-influence of the installation of the steam turbine body and the flushing of the oil system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0022] Figure 1 The utility model is a structural schematic diagram of a temporary jacking oil system connected to a steam turbine in one embodiment. DETAILED DESCRIPTION

[0023] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0024] like Figure 1 As shown, a temporary jacking oil system according to an embodiment of the present invention may include a main oil tank 100, an oil inlet pipeline 10, an oil filter 20, a jacking oil pump 30, an oil collecting tank 200, an oil return pipeline 40 and an oil return line.

[0025] The oil inlet pipeline 10 is connected between the main oil tank 100 and the steam turbine generator, and the oil filter 20 and the jacking oil pump 30 are arranged on the oil inlet pipeline 10. After the jacking oil pump 30 is started, it provides power to transport the jacking oil in the main oil tank 100 to the steam turbine generator, and the jacking oil is filtered and removed by the oil filter 20 before entering the steam turbine generator during the transportation process.

[0026] The oil return pipe 40 is connected between the steam turbine generator and the oil collecting tank 200, and the top shaft oil in the steam turbine generator returns to the oil collecting tank 200 through the oil return pipe 40. The oil return line is connected between the oil collecting tank 200 and the main oil tank 100, so that the top shaft oil in the oil collecting tank 200 returns to the main oil tank 100 through the oil return line, so that the main oil tank 100, the steam turbine generator and the oil collecting tank 200 are connected to form a circulation loop, in which the top shaft oil circulates.

[0027] A steam turbine generator usually includes a generator, a 2# low-pressure cylinder, a 1# low-pressure cylinder and high and medium-pressure cylinders. The top shaft oil is diverted along the oil inlet pipe 10 to the front of the steam turbine generator, and enters the corresponding bearing box through the generator rear diverter, the low-generator diverter, the low-low diverter, the low-middle diverter and the front box diverter respectively, and then enters the return oil pipe 40 through the buffer oil tank and the buffer pump, and returns to the oil collecting tank 200 through the return oil pipe 40.

[0028] Specifically, the main oil tank 100 may be provided with a first liquid level gauge 101 for detecting the liquid level in the main oil tank 100. When the liquid level exceeds the upper or lower limit of the oil storage, the oil return pipeline may be disconnected or the oil return pipeline (or oil supply pipeline) may be connected. The main oil tank 100 may also be provided with a sampling port for sampling and testing the top shaft oil in the main oil tank 100 as needed. The main oil tank 100 may also be provided with a sewage outlet for the purpose of emptying and cleaning the main oil tank 100.

[0029] The main oil tank 100 may also be provided with a temperature measuring point for plugging in a temperature detection device 102 such as a thermocouple to detect the temperature inside the main oil tank 100 .

[0030] On the oil inlet pipeline 10, the oil filter 20 is located at the inlet side of the top shaft oil pump 30. In some embodiments, the oil filter 20 is preferably a double-tube oil filter. When one filter element needs to be cleaned or replaced, the other filter element is switched without stopping the machine to perform normal continuous operation.

[0031] A one-way valve 11 may be provided on the oil inlet pipe 10 at the outlet side of the jacking oil pump 30 to prevent the jacking oil from flowing back. An overflow pipe 31 is also connected between the jacking oil pump 30 and the main oil tank 10, and the jacking oil overflowing from the jacking oil pump 30 can flow back into the main oil tank 10 through the overflow pipe 31.

[0032] Further preferably, a second heat exchanger 32 may be provided on the overflow pipe 31, and the top shaft oil in the overflow pipe 31 passes through the second heat exchanger 32 during the reflux process, and enters the main oil tank 10 after being cooled. The second heat exchanger 32 may be an air cooler, using air as a cold source to perform heat exchange with the oil passing through the air cooler, and take away the heat of the oil.

[0033] The oil inlet pipeline 10 may further be provided with a first pressure detection device 12 and a second pressure detection device 13, which are respectively located at the inlet end and the outlet end of the top shaft oil pump 30 on the oil inlet pipeline 10, and are respectively used to detect the pressure at the inlet and the outlet of the top shaft oil pump 30. The first pressure detection device 12 and the second pressure detection device 13 may be, but are not limited to, pressure gauges.

[0034] As required, a flow meter (not shown) may be provided on the oil inlet pipeline 10 to detect the delivery flow rate of the jacking oil.

[0035] Similar to the main oil tank 100, the oil collecting tank 200 may be provided with a second liquid level gauge 201 for detecting the liquid level in the tank. The oil collecting tank 200 is also provided with a sampling port to sample and test the top shaft oil in the oil collecting tank 200 as needed. The oil collecting tank 200 is also provided with a sewage outlet to facilitate the emptying and cleaning of the oil collecting tank 200.

[0036] The oil return line is connected between the oil collecting tank 200 and the main oil tank 100, and returns the top shaft oil collected in the oil collecting tank 200 to the main oil tank 100 for recycling. The oil return line may further include an oil return pipeline 51, a first oil filter 52 and a first heat exchanger 53 arranged on the oil return pipeline 51.

[0037] When the oil in the oil collecting tank 200 is returned along the oil return pipe 51 , it may first be filtered by the first oil filter 52 to remove impurities and dirt therein, and then enter the main oil tank 100 after being cooled by heat exchange in the first heat exchanger 53 .

[0038] The first oil filter 52 is a device integrating filtering and power pumping, and a Boer oil filter is preferably used.

[0039] The first heat exchanger 53 may be an air cooler, using air as a cooling source to perform heat exchange with the oil passing through the air cooler, thereby taking away the heat of the oil.

[0040] In addition, a first exhaust pipe 21 is connected between the oil filter 20 and the main fuel tank 10, a second exhaust pipe 54 is connected between the first heat exchanger 53 and the main fuel tank 10, and a third exhaust pipe 33 is connected between the second heat exchanger 32 and the main fuel tank 10. The first exhaust pipe 21, the second exhaust pipe 54 and the third exhaust pipe 33 can transport the generated oil smoke into the main fuel tank 10 to avoid discharge into the atmosphere and causing pollution.

[0041] Furthermore, as required, the temporary jacking oil system of the present invention may also include an oil supply pipeline connected to the main oil tank 100 to replenish the main oil tank 100 with oil.

[0042] The oil supply line may include an oil supply pipeline 61 connected between the oil barrel 300 and the main oil tank 100, and a second oil filter 62 disposed on the oil supply pipeline 61. The second oil filter 62 extracts the lubricating oil in the oil barrel 300 and filters it at the same time, and sends the filtered lubricating oil into the main oil tank 100 through the oil supply pipeline 61 to be used as jacking oil.

[0043] The second oil filter 62 may be a device integrating filtering and power pumping, and a Boer oil filter may be preferred.

[0044] It can be understood that valves are provided on the above-mentioned pipelines, including the oil inlet pipeline 10, the oil return pipeline 40, the oil return pipeline 51 and the oil supply pipeline 61, to control the on-off and flow of the pipelines.

[0045] When the temporary jacking oil system of the utility model is installed and used, lubricating oil is first injected from the oil barrel into the main oil tank 100 through the oil supply pipeline, and the oil injection is stopped after the oil injection reaches the specified oil level, and the jacking oil pump 20 is started, and the jacking oil pressure is adjusted by the regulating valve. The jacking oil enters the steam turbine generator at a predetermined pressure, which can fully rotate the rotor to meet the requirements of precise centering of the shaft system, greatly reducing the adjustment amount and adjustment times of the bearings during subsequent precise centering.

[0046] The return oil is returned to the oil return pipeline 40 and the oil collecting tank 200 from the oil return ports of the turbine generator bearing boxes through the metal hose. The return oil pipeline pumps the oil back to the main oil tank 100 to form a cycle.

[0047] The temporary jacking oil system of the utility model is suitable for the installation stage of the steam turbine. By introducing the temporary jacking oil system, the installation work of the steam turbine body is completely decoupled from the formal jacking oil system, and the flushing of the external pipeline of the bearing box of the formal oil system can completely avoid the intersection with the installation work of the steam turbine body. Only a small amount of flushing work of the final bearing box part intersects with the steam turbine body, thereby achieving the purpose of optimizing the oil flushing work logic and shortening the total duration of the oil flushing, and solving the contradiction between the installation flushing and commissioning progress of the formal jacking oil system and the installation requirements of the steam turbine body.

[0048] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A temporary jacking oil system, characterized in that: It includes the main oil tank, oil inlet pipeline, oil filter, jacking oil pump, oil collecting tank, oil return pipeline and oil return line; The oil inlet pipeline is connected between the main oil tank and the steam turbine generator, and the oil filter and the top shaft oil pump are arranged on the oil inlet pipeline; the oil return pipeline is connected between the steam turbine generator and the oil collecting tank, and the oil return pipeline is connected between the oil collecting tank and the main oil tank.

2. The temporary jacking oil system according to claim 1, characterized in that: The oil filter is a double-tube oil filter.

3. The temporary jacking oil system according to claim 1, characterized in that: The oil inlet pipeline is provided with a first pressure detection device and a second pressure detection device, and the first pressure detection device and the second pressure detection device are respectively located at the inlet end and the outlet end of the jacking oil pump on the oil inlet pipeline.

4. The temporary jacking oil system according to claim 1, characterized in that: The oil return pipeline comprises an oil return pipeline and a first oil filter arranged on the oil return pipeline.

5. The temporary jacking oil system according to claim 4, characterized in that: The oil return pipeline also includes a first heat exchanger arranged on the oil return pipeline.

6. The temporary jacking oil system according to claim 5, characterized in that: The first heat exchanger is an air cooler.

7. The temporary jacking oil system according to any one of claims 1 to 6, characterized in that: The temporary jacking oil system also includes an oil supply pipeline connected to the main oil tank.

8. The temporary jacking oil system according to claim 7, characterized in that: The oil supply line comprises an oil supply pipeline connected between the oil barrel and the main oil tank, and a second oil filter arranged on the oil supply pipeline.

9. The temporary jacking oil system according to any one of claims 1 to 6, characterized in that: The temporary jacking oil system also includes an overflow pipe connected between the jacking oil pump and the main oil tank.

10. The temporary jacking oil system according to claim 9, characterized in that: The overflow pipe is provided with a second heat exchanger.

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