JPH0988508A - Turbine oil flushing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the oil flushing operation while adjusting the amount of oil supplied for individual bearing simultaneously with the assembly of the bearings to shorten an oil flushing period. SOLUTION: A cleaning device 25 is mounted on a bearing base 9 provided per a plurality of bearings 3 to clean the bearing base 9 when lubricating oil is supplied at the time of oil flushing. A change-over device 18 is mounted on an orifice strainer 8 provided per a plurality of bearings 3 to change over a flow passage of lubricating oil so that lubricating oil is supplied into the cleaning device 25 at the time of oil flushing. A pipe for cleaning 23 is connected in such a manner that a section between the cleaning device 25 and the change- over device 18 can be removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbine oil flushing device for cleaning lubricating oil of a turbine bearing lubricating oil device.

[0002]

2. Description of the Related Art A conventional turbine bearing lubricating oil system and oil flushing for cleaning the lubricating oil will be described. FIG. 7 is a block diagram of a conventional turbine bearing lubricating oil device. In FIG. 7, a plurality of turbines 1a
˜1d (here, four turbines 1 are schematically shown) are connected by a turbine shaft 2 (a plurality of turbine shafts are connected), and each turbine 1a-1d is supported by a plurality of bearings 3. It has a rotating structure.

Lubricating oil is supplied between the turbine shaft 2 and the bearing 3. This lubricating oil is stored in the oil tank 4, is pumped up by the oil pump 5, and is refueled by the refueling mother pipe 6.
Is supplied to each bearing 3 through the respective oil supply pipes 7 and the orifice strainer 8.
Then, the lubricating oil is supplied to the inside of the bearing 3 through the inside of the bearing 3 and returned to the oil tank 4 through the return oil mother pipe 12. In this case, at the inlet of the oil tank 4, the lubricating oil is collected while constantly capturing large foreign matters via the return oil strainer 16.

Here, the turbine shaft 2 and the bearing 3 are formed with a minute gap, but the lubricating oil supplied to the bearing 3 is returned to the return oil mother pipe 12 through this gap. FIG. 8 shows the structure of the turbine shaft 2 and the bearing 3 and the flow of the lubricating oil, and FIG. 9 shows the side surface in the turbine axis direction of FIG.

As shown in FIGS. 8 and 9, the turbine shaft 2
Lubricating oil coming out of the gap between the bearing 3 and the bearing 3 is collected under the bearing base 9 and guided to the return oil mother pipe 12 by the bearing base return oil pipe 11. Then, it is configured to return to the oil tank 4.
That is, the return lubricating oil from the bearing 3 is collected in the oil tank 4 due to the positional head difference between the bearing 3 and the oil tank 4.

The upper portion of the bearing base 9 is sealed by a bearing cover 10 which seals the lubricating oil so that the lubricating oil does not scatter.
8 and 9, the refueling mother pipe 6 and the return oil mother pipe 12 are shown as a double pipe structure in order to save the piping space.

Next, FIG. 10 shows the details of the orifice strainer 8. The orifice strainer 8 is provided between the bearing oil supply pipe 7 from the oil supply mother pipe 6 and the bearing 3, and is installed for each bearing 3. The orifice strainer 8 has a strainer 14 for preventing foreign matter from flowing into the bearing 3 of the turbine 1 and an orifice 13 for restricting the oil amount distribution to the bearing 3. The strainer 14 is used when the turbine is operating. It is a strainer with relatively rough eyes to prevent the inflow of foreign matter. This is to prevent a situation where a strainer having a fine mesh is apt to be clogged and the amount of oil supplied to the bearing is immediately insufficient. Further, the orifice strainer lid 15 is opened to replace the strainer 14 and the flushing strainer at the time of oil flushing.

When the turbine 1 is opened and disassembled, the bearing base cover 10 is opened, the bearing 3 is removed, and the turbine shaft 2 is taken out. Assembly is the reverse of this procedure. After the turbine 1 is opened and disassembled, the turbine 1 is assembled. However, minute foreign matter is mixed into the bearing 3 and the bearing base 9, the oil supply pipe 6, the bearing oil supply pipe 7, the bearing base return oil pipe 11, the return oil carrier. It is necessary to remove foreign matter in the tube 12.

Therefore, an oil flushing operation is performed to maintain the cleanliness of the lubricating oil at a specified value. This is to prevent foreign matter from passing through the coarse strainer 14 built in the orifice strainer 8 into the bearing 3 of the turbine 1 during turbine operation. This prevents damage to the turbine shaft 2 and the bearing 3.

In the oil flushing of the prior art, in the turbine bearing lubricating oil system described above, after the turbine 1 is assembled, the strainer 14 of the orifice strainer 8 provided between the bearing oil supply pipe 7 and the bearing 3 is replaced with the strainer for flushing. The turbine bearing lubricating oil device is operated after replacement with the above, and foreign matter in the lubricating oil is captured. That is, the orifice strainer lid 15 is opened, the strainer 14 is removed, the flushing strainer with a fine mesh is inserted, and the lubricating oil is passed therethrough to trap foreign matters in the lubricating oil.

In this case, the bearing oil supply pipe 7 passes through the bearing 3 and the bearing base 9 is formed from the minute gap between the turbine shaft 2 and the bearing 3.
Overflows into the bearing stand return oil pipe 11. Therefore,
Foreign matter in the portion under the bearing base 9 where the lubricating oil flows is
It is collected in the oil tank 4 through the return oil mother pipe 12 together with the return lubricating oil. A part of the foreign matter remains in the oil tank 4, and a part thereof is pumped up again by the oil pump 5, passes through the oil supply mother pipe 6 and the bearing oil supply pipe 7, and is supplemented by a fine strainer in the orifice strainer 8.

By continuing such an operation, a primary oil flushing operation is performed to raise the cleanliness of the lubricating oil to some extent.
After this process (primary oil flushing), the oil tank 4 is opened to remove the lubricating oil to remove foreign matters in the oil tank 4 (oil tank cleaning), and the oil pump 5 and the flushing strainer are passed again. Perform secondary oil flushing operation.

Therefore, in assembling the turbine after the open disassembly of the turbine 1 by the periodic inspection of the turbine 1 and the like,
In addition to the assembly period of the bearing 3, an oil flushing period represented by the sum of the primary flushing period, the oil tank cleaning period, and the secondary flushing period was required.

[0014]

However, the turbine 1
It is required to shorten the assembling process of the turbine after the open disassembly of the turbine 1 by the periodic inspection, etc. Therefore, it has been considered to shorten the oil flushing period, but since the oil flushing can be performed only after all the bearings 3 have been assembled, it cannot be performed in parallel with the assembly of the bearings 3. That is, since there is no function of stopping the supply of the lubricating oil to each bearing 3 for each bearing 3 and it is necessary to supply oil to all the bearings 3 at the same time, the flushing operation must be performed only after all the bearings 3 have been assembled. Because you can't start.

It is conceivable to provide a closing device such as a valve in the bearing oil supply pipe 7 in order to obtain the function of stopping the supply of the lubricating oil to the bearing 3 for each bearing 3.
If the closing device is closed during normal operation, it will seriously affect the operation of the turbine 1. Therefore, it is common not to provide such a closing device in order to prevent the situation such as the supply of lubricating oil. It was target.

As described above, all the bearings 3 must be supplied with oil at the same time. Therefore, due to the capacity limitation of the oil pump 5 and the restriction of the orifice 13 built in the orifice strainer 8, the amount of oil supplied to each bearing 3 is the specified flow rate ( The flow rate cannot exceed the normal turbine flow rate). For cleaning the inside of the oil supply mother pipe 6 and the bearing oil supply pipe 7, the cleanliness can be improved by cleaning at about 1.5 to 2 times the normal flow rate.
Since the flow rate of the lubricating oil cannot be increased as described above, the period for cleaning the lubricating oil cannot be shortened.

Although the bearing base 9 is always opened when the turbine is disassembled, the inner surface of the bearing base 9 cannot be cleaned during the oil flushing operation, so that the foreign matter adhering to the inner surface of the bearing base 9 is not easily removed and the bearing is not removed. It was collected on the lower side of the table 9 and gradually returned to be collected in the lubricating oil.

Further, if foreign matter is caught by the fine straining strainer inserted into the strainer 8 by the oil flushing operation and the eyes become clogged, the oil pump 5
Is stopped, the orifice strainer cover 15 of the orifice strainer 8 is opened, the strainer for flushing is taken out and washed, and then the assembling oil pump 5 is restarted to perform the work of starting the flushing operation. Since the degree of clogging of the flushing strainer of each bearing 3 (the degree of foreign matter trapping) is different, it is necessary to stop the operation of the oil pump 5 each time the flushing strainer is clogged. Flushing of the other bearings 3 becomes a waiting time for the strainer cleaning work. Therefore, the flushing period is long.

As described above, in the conventional oil flushing, the flushing operation cannot be started until all the bearings 3 have been assembled. Therefore, the process including the assembly period of the bearings 3 requires a long period of time.

Further, since there is no closing device for stopping the supply of the lubricating oil to the bearings 3 for temporarily obtaining a large flow velocity to each bearing 3, the flow rate of the bearings 3 cannot be adjusted. Since the bearing 3 is configured to be supplied with lubricating oil at the same time, the amount of oil passing through each bearing 3 becomes a normal amount, and it is impossible to flow at a flow velocity faster than the normal flow velocity effective for cleaning, and the cleaning effect is small. there were.

Further, the inner surface of the bearing base 9 cannot be washed after the bearing 3 is assembled, and a small amount of the normal lubricating oil which flows in the lower part of the bearing base 9 causes the lubricating oil to return to the orifice strainer 8. Only the foreign matter was captured by the flushing strainer.

Furthermore, when one flushing strainer is clogged, it is necessary to stop the oil pump 5 each time to clean and restore the flushing strainer, so that the other flushing strainers can perform flushing operation. It was waiting time.

Therefore, it takes a long time for the cleanliness of the lubricating oil to reach the target level. The oil flushing period is always necessary for performing the open inspection of the turbine 1, and shortening this flushing period shortens the turbine inspection days.

An object of the present invention is to provide a turbine oil flushing device capable of shortening the oil flushing period by enabling oil flushing operation while adjusting the amount of oil supplied to each bearing in parallel with the assembly of the bearing. Is to get.

[0025]

According to a first aspect of the present invention, there is provided a cleaning device which is attached to a bearing stand provided for each of a plurality of bearings and which is supplied with lubricating oil at the time of oil flushing to wash the bearing stand. And a switching device that is attached to an orifice strainer provided for each of a plurality of bearings and that switches the flow path of the lubricating oil so that the lubricating oil is supplied to the cleaning device during oil flushing. And a removable cleaning pipe connecting the two.

According to the first aspect of the invention, at the time of oil flushing, it is switched for each bearing so that the lubricating oil is supplied to the cleaning device attached to the bearing base by the switching device. Perform cleaning. Therefore, the flushing operation can be performed without assembling all the bearings.

According to a second aspect of the present invention, in the first aspect of the present invention, the switching device is detachably attached to the orifice strainer, and is provided with a closing device for closing the supply of the lubricating oil to the bearing at the time of oil flushing. ing.

In the second aspect of the present invention, at the time of oil flushing, a strainer for flushing is attached, the supply of lubricating oil to the bearing is stopped, and the lubricating oil is supplied to the cleaning device.

The invention of claim 3 is the invention of claim 1 or claim 2.
In the above, the switching device has a stop valve in the flow path through which the lubricating oil is supplied to the cleaning device, the cleaning pipe has an operation valve, and controls the amount of cleaning oil supplied to the cleaning device by the stop valve or the operation valve. I try to adjust it.

According to the third aspect of the present invention, the amount of oil supplied to each bearing is made larger than the normal flow rate by the stop valve or the operation valve to increase the flow velocity. This enhances the efficiency of cleaning.

The invention of claim 4 is the first to third aspects of the invention.
In the above invention, the flushing strainer is provided in a part of the cleaning pipe.

In the fourth aspect of the present invention, when the flushing strainer is replaced, only the clogged flushing strainer is isolated without stopping the oil pump.

[0033]

Embodiments of the present invention will be described below. FIG. 1 is an explanatory diagram showing a first embodiment of the present invention, and FIG. 2 is a configuration diagram showing a turbine bearing lubricating oil device according to the present invention. Note that FIG. 2 shows a state in which the switching device 18 is attached.

In FIG. 2, during normal turbine operation,
Similar to the conventional example, the lubricating oil in the oil tank 4 is pumped up by the oil pump 5 and sent by the oil supply mother pipe 6 which is an inner pipe of the double pipe, and the bearing oil supply pipe 7 to each bearing 3 and the orifice strainer 8 The bearing 3 is refueled via. Lubricating oil (return oil) supplied to the bearing 3 passes through the return oil strainer 16 built in the oil tank 4 and finally reaches the oil tank 4 in the same manner as in the prior art.
Be recovered to.

Next, at the time of oil flushing, as shown in FIG. 1, the switching device 18 is connected to each orifice strainer 8.
Attach to That is, the orifice strainer lid 15
Then, the strainer 14 inside is removed, the strainer 17 for flushing is attached, and the closing device 19 is driven by the driving device 20 to close and fix the orifice 13. The switching device 18 uses the lubricating oil flowing from the refueling mother pipe 6 side to the bearing 3
To the cleaning device 25 side instead of to the stop valve 21, the joint 22,
It is guided through the cleaning pipe 23 and the operation valve 24. The guided lubricating oil cleans the inner surfaces of the bearing base 9 and the bearing base cover 10 with a cleaning device 25.
Wash the surroundings with. Although not shown in FIG. 1, the washed lubricating oil passes through the bearing stand return pipe 11 and the return oil mother pipe 12 below the bearing stand 9 and is shown in FIG. 2 as in the conventional example shown in FIGS. 8 and 9. Thus, the oil is collected in the oil tank 4 via the return oil strainer 16 built in the oil tank 4.

As described above, at the time of oil flushing, the orifice 13 of the orifice strainer 8 is closed by the closing device 19. At this time, the amount of oil supplied to the bearing base 9 is opened and closed by opening and closing the stop valve 21. Adjust. A switching device 18 is attached to each orifice strainer 8 of each bearing 3, and the cleaning oil supply of each bearing base 9 is individually stopped or adjusted for each orifice strainer 8 of each bearing 3. The joint 22 and the cleaning pipe 23 for introducing the cleaning lubricating oil to the bearing stand cover 10 have a detachable structure. In addition, the operating valve 24 at the inlet of the cleaning device 25
Is attached near the cleaning device 25 in order to improve operability during cleaning work. The cleaning device 25 is configured to be easily attached to the bearing base cover 10 and removable.

The assembling device 18 and the cleaning device 25 having such a structure are attached to the orifice strainer 8 and the bearing base 9 after the individual bearings 3 are assembled, and the cleaning work is individually performed for each bearing base 9. As a result, each bearing base 9 can be individually cleaned, and the number of bearing bases 9 that have been oiled for cleaning is small, so that the amount of oil supply per location is increased, and The amount of oil supplied to the table 9 can be adjusted as compared with the normal flow rate. Further, not only the lower part of the bearing stand 9 but also the entire inner surface including the bearing stand cover 10 can be washed, so that the washing range is expanded and the flushing effect is further enhanced.

Here, the switching device 18 is attached to all the orifice strainers 8 in each bearing 3, the stop valve 21 is closed, and one orifice strainer 8 is used for cleaning the bearing bases 9 at two adjacent places of the turbine 1. It is also possible to attach the cleaning device 25 to each bearing base 9 by the switching device 18 and switch the joint 22, the operation valve 24, and the cleaning pipe 23 for cleaning. In this case, the cleaning pipe 23 is made of, for example, a stretchable material so that the switching device 18 of the orifice strainer 8 at one location is commonly used for the bearing base 9 in the vicinity, and the cleaning pipe 23 is sequentially switched for cleaning. You can

In the prior art, the normal flow rate of the turbine bearing is fixed and individually limited by the orifices 13 contained in the individual orifice strainers 8. In the first embodiment, however, the orifice 13 is limited. Since the oil is closed, the amount of oil for cleaning can be freely adjusted by the stop valve 21 and the operation valve 24, and a flow rate higher than normal can be flowed. Further, if the switching device 18 is removed from the orifice strainer 8, the strainer 14 is attached, and the orifice strainer lid 15 is attached, it is possible to easily restore the original state.

During the normal operation of the turbine, the switching device 1
Since the stop valve 21 in 8 is also removed, the valve does not exist in the middle of the bearing oil supply pipe 7 to the bearing 3, and the problem of insufficient oil supply due to valve closing does not occur.

Since the switching device 18 is attached to the orifice strainer 8 only at the time of oil flushing, the switching device 18 having a large passing area is provided to make the eyes of the flushing strainer 17 finer than before and to capture smaller foreign matters. Is possible. That is, the flushing strainer 17 having a large passage area of the same differential pressure as the conventional one is attached to enhance the foreign matter removing performance. Since the switching device 18 is removed after the flushing is completed, the switching device 18 of a slightly larger size is removed.
However, this does not mean an increase in the installation space for normal turbine operation.

Next, an oil flushing procedure according to the first embodiment of the present invention will be shown in the lower step of FIG.
Description will be made in comparison with the conventional oil flushing procedure shown in the upper part. In FIG. 5, A is the bearing assembly process period, B is the primary oil flushing period, C is the oil tank cleaning period, and D is D.
Is the secondary oil flushing period, E is the bearing stand cleaning period,
F is the bearing assembly period, and G is the shortening period.

After assembling one bearing 3 in FIG. 5, the bearing base 9 is washed, and the next bearing 3 is assembled during the washing. As a result, the assembly of the bearing 3 and the washing of the bearing base 9 similar to the conventional primary oil flushing are performed in parallel. This shortens the period from the assembly of the bearing 3 to the primary oil flushing period. Then, after that, it becomes the total period of the oil tank cleaning period C and the secondary flushing period D, which is shorter than the process of the prior art by the shortening period G.

The relationship between the cleanliness of lubricating oil and time is shown in FIG. 6 in comparison with the conventional example. In FIG. 6, the horizontal axis represents the oil flushing time, and the vertical axis represents the oil cleanliness. In the conventional example, the oil cleanliness is shown by the curve H, and it takes a long time to reach the target oil cleanliness. The point J where the cleanliness temporarily deteriorates in the middle of the curve H is immediately after the oil tank 5 is opened and cleaned. On the other hand, the oil cleanliness of the lubricating oil according to the first embodiment of the present invention is shown by the curve I, and reaches the target level in a short period as shown in FIG. This is because the amount of cleaning oil for each bearing base 9 is increased, the trapping performance of the flushing strainer 17 is improved, and the inner surface cleaning range of the bearing base 9 is expanded.

Here, the orifice strainer 8 supplies lubricating oil to the bearings 3 as usual, the switching device 18 is attached to the orifice strainers 8 of the adjacent bearings 3, and the cleaning pipe 23.
It is also possible to supply the adjacent lubricating oil to the cleaning device 25 attached to the bearing base 9 and perform flushing with the lubricating oil equivalent to two bearings as one bearing 3. In this case, since the amount of lubricating oil can be increased to enhance the cleaning effect,
A greater effect can be obtained.

Next, FIG. 3 shows a second embodiment of the present invention. In the second embodiment, the closing device 19 for closing the orifice 13 of the switching device 18 is built in the orifice strainer 8. That is, the closing device 19 is screwed to the main body of the switching device 18 by the screw portion 29, and is configured to move left and right in the orifice strainer 8 by rotating the closing device 19. Even in this case, the same effect as that of the first embodiment can be obtained. The first embodiment and the second embodiment described above and any of the embodiments show an example of the switching device 18 which is attached to the orifice strainer 8 to switch the oil supply and supply the cleaning oil. The structure of other switching devices is also conceivable.

FIG. 4 shows a third embodiment of the present invention.
In the third embodiment, a fine strainer as a flushing strainer 30 is provided between the stop valve 21 after the switching device 18 attached to the orifice strainer 8 and the cleaning device 25 of the bearing base 9. Other configurations are the same as those of the first embodiment shown in FIG. 1, and therefore, the same components are denoted by the same reference characters and description thereof will be omitted.

According to the third embodiment, the foreign matter in the lubricating oil is captured by the flushing strainer 30 which is a fine strainer, and when it becomes clogged, the stop valve 21 is closed to isolate the flushing strainer 30. Clean and restore. That is, it is not necessary to stop the oil pump 5 to clean the flushing strainer 30, and each time the bearing 3 is clogged with the flushing strainer 30, the stop valve 21 is individually closed to isolate the flushing strainer 30. And wash. Although the flushing strainer 30 is shown as being provided between the stop valve 21 and the joint 22 in FIG. 4, it may be provided at any position between the stop valve 21 and the cleaning device 25.

In the third embodiment, the switching device 18
The fine strainer 17 for flushing is not built in the inside of. As a result, the oil pump 5 can be continuously operated during the flushing period, and the flushing strainer 30 can be washed without being limited to each bearing 3.

[0050]

As described above, according to the present invention, the mounting bearing stand can be independently washed for each individual bearing, so that a larger amount of oil can be flowed during washing to increase the flow velocity. The oil flushing effect can be enhanced. Further, since the bearings can be washed after they are assembled, they can be washed in parallel with other bearing assembly work.
Therefore, the primary flushing period is shortened. Further, it is possible to quickly catch fine foreign matter and set the oil cleanliness to a target level in a short time by mounting a strainer for fine flushing and fine cleaning with a high flow rate.

Further, since the switching device and the cleaning device can be attached to and detached from the orifice strainer and the bearing base, the turbine lubricating oil device can be used without changing its function. The bearings near one bearing can also be shared by adopting an elastic cleaning pipe and a removable joint. Further, it is also possible to clean the inside of the bearing stand by supplying oil to the bearing stand by the orifice strainer and cleaning oil from the switching device attached to the adjacent orifice strainer to the same bearing stand to clean the inside of the bearing stand.

Further, since the flushing strainer is provided between the switching device and the washing device and the flushing strainer is isolated by the stop valve, each flushing strainer can be washed without stopping the oil pump. Therefore, the oil pump is continuously operated, and the other bearing stands can be continuously cleaned. Since there is no oil pump stop period, there is no need to stop or start the oil pump, and the operation is continuous and simple. Further, by continuing the continuous flushing, the flushing effect is further improved. As described above, the oil flushing period of the turbine open inspection period can be significantly shortened.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a turbine bearing lubricating oil device of the present invention.

FIG. 3 is an explanatory view showing a second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a third embodiment of the invention.

FIG. 5 is an explanatory view of a process of assembling a bearing of a turbine and an oil flushing process.

FIG. 6 is a characteristic diagram showing a relationship between cleanliness of turbine lubricating oil and oil flushing time.

FIG. 7 is an explanatory diagram of a conventional turbine bearing lubricating oil device.

FIG. 8 is an explanatory diagram of oil flushing according to a conventional example.

9 is an explanatory view seen from the side direction of FIG.

FIG. 10 is an explanatory diagram of a conventional orifice strainer.

[Explanation of symbols]

 1 Turbine 2 Turbine Shaft 3 Bearing 4 Oil Tank 5 Oil Pump 6 Lubricating Master Pipe 7 Bearing Lubricating Pipe 8 Orifice Strainer 9 Bearing Stand 10 Bearing Stand Cover 11 Bearing Stand Return Oil Pipe 12 Return Oil Mother Pipe 13 Orifice 14 Strainer 15 Orifice Strainer Lid 16 Return oil strainer 17 Strainer for flushing 18 Switching device 19 Closing device 20 Drive device 21 Stop valve 22 Joint 23 Cleaning pipe 24 Operating valve 25 Cleaning device 29 Screw part 30 Flushing strainer

Claims (4)

[Claims] 1. A lubricating oil is introduced from an oil tank, which stores lubricating oil supplied to a plurality of bearings of a turbine, to the bearing through an orifice strainer, and the lubricating oil supplied to the bearing is passed through a bearing mount to the lubricating oil. Turbine oil flushing for cleaning the lubricating oil by operating the turbine bearing lubricating oil device by replacing the strainer in the orifice strainer of the turbine bearing lubricating oil device which is returned to the oil tank with a strainer for flushing In the apparatus, a cleaning device that is attached to the bearing base provided for each of the plurality of bearings and that is supplied with the lubricating oil at the time of oil flushing to clean the bearing base, and for each of the plurality of bearings. The oil is supplied to the cleaning device when the oil is flushed by being attached to the orifice strainer provided. A switching device for switching the flow path of the lubricating oil as described above, and a detachable cleaning pipe for connecting the cleaning device and the switching device, a turbine oil flushing device. 2. The switching device is removably attached to the orifice strainer, and comprises a closing device for closing the supply of lubricating oil to the bearing during oil flushing. The turbine oil flushing device described in 1. 3. The switching device has a stop valve in a flow path through which the lubricating oil is supplied to the cleaning device, the cleaning pipe has an operation valve, and the cleaning valve is operated by the stop valve or the operation valve. The turbine oil flushing device according to claim 1 or 2, wherein the amount of cleaning oil supplied to the device is adjusted. 4. The turbine oil flushing device according to claim 1, wherein the flushing strainer is provided in a part of the cleaning pipe.