JPH07269304A - Lubricating device for rotary machine having sliding bearing - Google Patents

Abstract

PURPOSE:To shorten regular detecting process by starting flashing while arranging an oil piping for supplying and returning in parallel after main body assembling process is completed. CONSTITUTION:In a lubricating device for supplying lubricating oil 2 which is reserved in a lubricating oil tank 1 to the lubricating part of a rotary machine having a sliding bearing, a sliding bearing 8 is provided to shorten the regular detecting process of a rotary machine by arranging a bypass pipe 12 between a lubricating oil feed piping 4 and an oil return piping 9. It is thus possible to shorten routine inspection stroke of the rotary machine without arranging a large facility such as a supposition pump having a large capacity or an oil reserving tank.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil device for a rotary machine having a slide bearing.

[0002]

2. Description of the Related Art Conventionally, a steam turbine facility is provided in a nuclear power plant, a thermal power plant, and a power plant such as steam in a steel plant. A turbine for lubricating a turbine bearing or a generator bearing is provided in the steam turbine facility. A lubricating oil system is used. A lubricating oil system used for this turbine lubricating oil system is shown in FIG. As shown in the figure, a lubricating oil pump 3 is provided so as to be connected to a lubricating oil tank 1 which stores lubricating oil 2, and the lubricating oil pump 3 is driven to move the lubricating oil 2 in the lubricating oil tank 1 from a supply pipe 4. After the oil whose temperature has been raised is cooled by the oil cooler 5, it is supplied to the bearing 8 such as a turbine bearing through the oil quantity regulator 6 and the supply pipes 7a and 7b to each bearing to lubricate the bearing. The oil that lubricated the bearings is returned from the bearing oil return pipes 9a and 9b to the lubricating oil tank 1 after passing through the oil return pipe 9 to remove foreign matters such as dust contained in the returned oil by the filter 10. Has become.

On the other hand, the lubricating function of the lubricating oil gradually deteriorates with the lapse of operating time due to deterioration of the oil due to mixing of water and mixing of foreign matters such as dust. In order to prevent the deterioration of the lubricating function, lubricating oil cleaning equipment (not shown) is provided. When a rotary machine having a slide bearing is newly installed or regularly inspected, as shown in FIG. 2, the oil flushing of the bearing portion of the rotary machine is performed by the rotary machine body assembling process, the centering process and the coupling process. It is carried out after the completion of all the steps of, and the construction period is extremely long.
On the other hand, if an attempt is made to perform oil flushing in parallel with the centering process and the coupling process, the rotation machine will move due to the oil supply. There is a problem that it cannot be achieved at all.

Therefore, for example, as in Japanese Patent Laid-Open No. 63-88400, dust and rust adhering to the oil surface and the pipe wall in the oil return pipe are swung by a flushing pump and a flow control valve to shorten the flushing process. To improve the cleanliness of the oil by providing an oil storage tank in addition to the lubricating oil tank and installing an oil flushing system to divide the filter into three stages as in the method and JP-A-63-83497. Has proposed a flushing process itself.

[0005]

In the conventional method of performing oil flushing after performing centering and coupling after assembling the main body as described above, the whole construction period becomes extremely long. On the other hand, when trying to perform oil flushing by supplying lubricating oil during the centering and coupling processes, there is a problem that the axis of the rotating machine will move and the purpose of both processes will not be achieved. I have no choice but to make progress. Further, in Japanese Patent Laid-Open No. 63-88400, there is a problem that a large-capacity flushing pump is required, and the swing operation must be manually adjusted by a person as in the conventional case regarding the supply pipe and the metal portion. . On the other hand, Japanese Patent Laid-Open No. 63-83497 requires large-scale equipment such as an oil storage tank and a filter system,
Further, there is a problem that internal flushing of piping becomes critical.

[0006]

[Means for Solving the Problems] As a result of intensive development by the inventors to solve such a problem, as a result, a lubricating oil supply pipe and an oil return pipe to each bearing of a rotary machine are connected by a bypass pipe. It is another object of the present invention to provide a lubricating oil device for a rotary machine having a slide bearing, which can shorten the construction period of a new installation or regular inspection of the rotary machine by starting flushing after completion of the main body assembly process. The gist of the invention is to send lubricating oil stored in a lubricating oil tank to a lubricating section of a rotary machine having a sliding bearing via a lubricating oil supply pipe,
In a lubricating oil device that circulates lubricating oil from the lubrication unit back to the lubricating oil tank via an oil return pipe, by constructing a bypass pipe between the lubricating oil supply pipe and the oil return pipe, A lubricating oil device for a rotary machine having a slide bearing characterized by shortening the steps and regular inspection steps.

[0007]

The present invention will be described in detail below with reference to the drawings. FIG. 1 is a system diagram showing an embodiment of a lubricating oil device for a rotary machine having a lubricating oil slide bearing according to the present invention. As shown in FIG. 1, a lubricating oil device for a rotary machine having a slide bearing includes a lubricating oil tank 1 for storing lubricating oil for bearing lubrication, and a lubricating oil pump connected to the lubricating oil tank 1 via a valve 11. The lubricating oil discharged from 3 is the lubricating oil pump 3
Drives the lubricating oil 2 in the lubricating oil tank 1 to supply pipe 4
After the oil to be heated is further cooled by the oil cooler 5, it is supplied to the bearing 8 via the oil amount adjuster 6 and the lubricating oil supply pipes 7a and 7b to each bearing to lubricate the bearing. ing. The oil that lubricated the bearing is returned to the bearing oil return pipe 9a from the bearing,
The foreign matter such as dust contained in the return oil is collected in the oil return pipe 9 from 9b and is returned to the lubricating oil tank 1 after being removed by the filter 10.

Although the lubrication path up to now is the same as that of the prior art shown in FIG. 3, in the present invention, by providing the bypass pipe 12 in the supply pipe 4 and the oil return pipe 9, the supply is performed after the main body is assembled. The flushing can be started in parallel via the pipe 4 and the oil return pipe 9.

Generally, in steam turbine equipment, it is obligatory to stop the steam turbine for legal inspection, and at the time of this stop, an oil pump of a turbine lubricating oil system, a turbine bearing, an oil purifier (filter), and other auxiliary equipment. Will also be inspected. During this inspection, the turbine power plant is stopped, the lubricating oil in the turbine lubricating oil system is recovered from the filter in the lubricating oil tank, and the stored oil is returned. The recovered lubricating oil is used in each device of the turbine lubricating oil system. After inspection and reassembly, bearings and supply piping,
Oil flushing operation of the oil return pipe is performed. That is, each oil system equipment of the lubricating oil system is reassembled after a regular inspection, and after this assembly, the oil flushing operation as shown in FIG. 2 is performed, and foreign matter such as rust and dust adhered to each equipment and oil pipe To be removed.

FIG. 2 is a flow chart showing the oil flushing operation according to the present invention in comparison with the conventional oil flushing operation. As shown in FIG. 2 (A), the oil flushing of the conventional rotary machine is performed after the main body assembling process, the bearing centering process and the coupling process, which requires a long time for the flushing process. It was On the other hand, FIG. 2 (B) shows the oil flushing operation of the rotary machine according to the present invention. The main body assembling step, the centering step and the coupling step are the same as the conventional ones, but the oil flushing step is the same. By installing bypass pipes in the supply pipe and the oil return pipe, it is possible to start flushing in parallel with the centering process and the coupling process by passing only the supply pipe and the oil return pipe through the bypass pipe after the main body assembly process is completed. Therefore, only the flushing of the bearing portion needs to be performed at the end of the coupling, and the regular inspection process can be extremely shortened.

[0011]

As described above, according to the present invention, the existing lubricating oil pump is used to newly install a rotary machine and perform a regular inspection process without having a large-scale temporary pump or a large-scale equipment such as an oil storage tank. Has an excellent effect that can be significantly shortened.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a lubricating oil device for a rotary machine having a lubricating oil slide bearing according to the present invention,

FIG. 2 is a flow chart showing an oil flushing operation according to the present invention in comparison with a conventional oil flushing operation,

FIG. 3 is a system diagram showing a conventional bearing supply device for lubricating oil.

[Explanation of symbols]

 1 Lubricating oil tank 2 Lubricating oil 3 Lubricating oil pump 4 Supply pipe 5 Oil cooler 6 Oil amount regulator 7a, 7b Each bearing oil pipe 8 Bearing 9 Oil return pipe 9a, 9b Bearing oil return pipe 10 Filter 11 Valve 12 Byvas pipe

Claims (1)

[Claims] 1. Lubricating oil stored in a lubricating oil tank is sent to a lubricating section of a rotary machine having a slide bearing via a lubricating oil supply pipe, and the lubricating oil is sent from the lubricating section to a lubricating oil tank via an oil return pipe. In the lubricating oil device that is returned to and circulated,
A lubricating oil device for a rotary machine having a sliding bearing, characterized in that a bypass pipe is arranged between the lubricating oil supply pipe and the oil return pipe to shorten a construction process and a regular inspection process.