JPS61268807A - Flushing method and flushing device - Google Patents

Abstract

PURPOSE:To perform an assembly regulation work of a bearing part simultaneously with a flushing work, by a method wherein, after lubricating oil is bypassed through the discharge oil of a lubricating oil system to effect preliminary flushing of a piping system, finish flushing is effected through the flow of the lubricating oil to the bearing part. CONSTITUTION:A chamber 18 is situated in a discharge pipe 9, and a filtering device 17' is contained in the chamber. Meanwhile, a bypass device 15 is mounted to an orifice box 11 to block a port P. Lubricating oil is bypassed through a hose 16' from the upper stream side of a port P, and is returned to the discharge 9 through the filtering device 17'. This causes circulation of the lubricating oil, and performs preliminary flushing of a lubricating oil feed pipe 5 and the discharge pipe 9. Assembly regulation of a bearing part 13 is preceded simultaneously with the preliminary flushing. Thereafter, A hose 16', connected to the chamber 18, is removed and is connected to the filtering device in a bearing box 14, a cover 19, shutting the connection between the discharge oil pipe 9 and the bearing box 14, is removed, and this performs finish flushing.

Description

Detailed Description of the Invention [Field of Application of the Invention] The present invention provides a method for flushing and cleaning a system for pumping and circulating lubricating oil to the bearings of rotating equipment constituting a steam turbine plant, and The present invention relates to a flushing device suitable for carrying out the method.

[Background of the invention]

Figure 3 shows an oil system diagram of a steam turbine plant. The oil system usually consists of an oil tank 1. Main oil pump (turbine shaft drive)
2. Auxiliary oil pump (motor driven) 3, booster pump (
Oil turbine drive) 4° Lubricating oil supply piping 5. Bearing 6.
Control oil supply oil pipe 7° Control equipment 8. Oil drain pipe 9. oil cooler 1
Consists of 0.

When starting operation under normal conditions, the auxiliary oil pump 3 and the bearing 6. The control equipment 8 is supplied with oil. FIG. 4 is a sectional view showing details of a method of lubricating the bearing portion. Oil is in orifice box 11. The bearing metal 13 is supplied with oil through the orifice plate 12. The waste oil is collected in the bearing box 14 and returned to the oil tank via the oil drain pipe 9).

In such an oil system, if solid foreign matter is contained in each of the piping and equipment or in the oil, it will cause damage to the bearings or control equipment. Therefore, after completion of equipment installation or completion of reassembly after overhaul inspection, oil flushing is performed because it is necessary to keep the oil system clean before starting operation.

The oil 72/gu circulates oil throughout the oil system by operating the auxiliary oil pump 3 shown in Figure 3, and a filter (not shown in Figure 3) is installed in the middle of the system. It is enforced by passing through the oil.

Regarding the need to prevent foreign matter from entering lubricating oil, see Thermal and Nuclear Power Generation VO127A5 (MAY, 197
6) Discussed in ``The impact of scratches on journals on bearings'' (page 410) by Nobuhiro San and Hiromasa Ichiyo in K.

In addition, an example of a refueling system is shown on page 72 of "Turbine Generator Course" (published by Thermal Power Generation Technology 1, an incorporated association in April 1978).
Thermal and nuclear power generation VOI2644 (APr, 19
As shown in "Construction and Trial Operation Experience of Shimane Nuclear Power Plant" by Niki Ka et al. and Mr. Tanirotaka in 75), pages 366-367, this is carried out at the final stage of construction.

Further, even when a steam turbine plant is periodically or temporarily overhauled and reassembled, flushing is performed prior to restarting operation.

FIG. 5 shows a conventional oil flushing method, and is an explanatory diagram of the oil flushing method and the oil filtration method at the bearing portion. The orifice box 11 is provided with a flushing oil bypass device 15. The lower part of the bypass device [15] closes the bearing oil supply hole P, and the flushing oil is allowed to flow from the upper part of the bypass device 15 into the bearing box 14 through the bypass pipe 16. A filtering device 17 is attached to the tip of the bypass pipe 16. In the conventional flushing method described with reference to FIG. The bearing box 1
The flushing work cannot be performed until after the assembly and adjustment work of the bearing 13 in the bearing 4 is completed. Therefore, there is a problem that the total construction period becomes longer.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and provides a flushing method that allows the flushing work to proceed in parallel with the assembly and adjustment work of the bearing part, and a flushing device suitable for carrying out the above flushing method. The aim is to contribute to shortening the overall construction period for construction work that involves flushing.

[Requirements for invention]

A flushing method according to the present invention created to achieve the above object is a method for flushing a lubricating oil circulation system of a bearing of each rotating equipment constituting a steam turbine plant. After performing preliminary flushing of the piping system by bypassing the lubricating oil supplied to the bearing part to the oil drain pipe of the lubricating oil circulation system, the lubricating oil supplied from the lubricating oil piping is passed through the bearing part for finishing. It is characterized by performing 72 tushing.

In addition, the flushing device of the present invention was created so that the above method can be easily carried out and its effects can be fully exhibited.
In a lubricating oil flushing device provided in a bearing part of rotating equipment constituting a steam turbine plant, means for blocking and opening a flow path between a lubricating oil supply pipe and the bearing part;
a pipe line that bypasses the upstream side of the cutoff point and causes the lubricating oil to flow into the oil drain pipe of the lubricating oil circulation system;
Further, the above-mentioned conduit is of a removable structure, and is characterized in that it has a means for closing the opening after the conduit is removed.

However, in the present invention, lubricating oil is a general term for oils and fats that circulate in a lubrication system, and also includes flushing oil.

[Embodiments of the invention]

Figures 1 and 2 show an embodiment of the flushing device of the present invention, which has 44 configurations for carrying out the 72 tushing method of the present invention, and Figure 1 shows a state in which preliminary flushing is being performed;
Figure 2 depicts the state in which finishing flushing is being performed.

This embodiment is an improvement by applying the device of the present invention to the conventional device shown in FIG. 5, and the same drawing reference numbers as in FIG. It is a constituent part.

A chamber 18 is provided in the oil drain pipe 9, and a filtration device 1 is installed therein.
Store 7'. On the other hand, the bypass device 15 that is defeated by the orifice box 11 omits the boat P. The port P
The lubricating oil is bypassed by a hose 16' from the upstream side of the oil drain pipe 9 through the filtering device jt17'.
Reflux to.

Reference numeral 19 denotes a lid attached to cut off communication between the oil drain pipe 9 and the bearing box 14.

When the lubricating oil is circulated in this manner, the lubricating oil is transferred to the bypass device 15. The oil flows into the drain pipe 9 via the hose 16' and the filter device 17', and solid foreign matter is captured and removed by the filter device 17'.

When the lubricating oil is fluidized and circulated as described above, the long piping portions of the lubricating oil supply pipe 5 and the oil drain pipe 9 (see FIG. 3) are flushed 72 times (preliminary flushing). In parallel with the above-mentioned preliminary flushing, assembly and adjustment of the bearing portion 13 (FIG. 1) can be performed.

After completing the assembly and adjustment of the bearing part, remove the hose 16' that was connected to the chamber 18KJ and connect it to the filtering device 17 in the bearing box 14 as shown in FIG. When the lid 19, which had been blocking communication between the oil drain pipe 9 and the bearing box 14, is removed, the flushing device becomes functional in the same manner as the conventional flushing device shown in FIG. This second
Perform finishing flushing as shown in the figure.

Since the preliminary brushing of the long lubricating oil circulation pipe has already been completed, the final flushing (Fig. 2) can be completed in a short time.

As a result, the construction period for installation work or periodic disassembly and reassembly work can be shortened, and the mechanical equipment can be operated quickly, making it possible to operate economically.

In other words, if oil flushing is performed according to the invention, preliminary flushing can be carried out in parallel with assembly work and can be performed for a sufficient amount of time, making it possible to complete oil flushing after all work is completed in a short time. In the conventional oil flushing, the oil flushing is started after all the work is completed, and it is rarely necessary to clean the oil after a long time, but the present invention eliminates this drawback.

〔Effect of the invention〕

As described in detail above, according to the method of the present invention, preliminary flushing of the piping section can be performed in parallel with the assembly and adjustment work of the bearing section, which can contribute to shortening the overall construction period. Also,
When the apparatus of the present invention is applied, the above-mentioned method can be easily carried out and its effects can be fully exhibited.

[Brief explanation of the drawing]

FIGS. 1 and 2 show the apparatus of the present invention in operation, with FIG. 1 showing a state in which preliminary flushing is being performed and FIG. 2 showing a state in which final flushing is being performed. FIG. 3 is a lubrication system diagram of a steam turbine plant. FIG. 4 is a sectional view for explaining the structure of a conventional bearing portion, and FIG. 5 is a sectional view of a conventional flushing device. DESCRIPTION OF SYMBOLS 1... Oil tank, '2... Main oil pump, 3... Auxiliary oil pump, 4... Booster pump, 5... Lubricating oil supply pipe, 6... Bearing, 7... Control oil supply pipe, 8...
・Control equipment, 9...Oil drain pipe, 10...Oil cooler, 1
1... Orifice box, 12... Orifice plate, 13... Bearing, 14... Bearing box, 15...
・Bypass device, 16... hose, 17, 17'...
- Passing device, 18... Chamber, 19.19'...
·lid.

Claims (1)

[Claims] 1. In a method for flushing a lubricating oil circulation system of a bearing of each rotating equipment constituting a steam turbine plant, the lubricating oil supplied to the bearing from a lubricating oil supply pipe is A flushing method characterized by performing preliminary flushing of a piping system by bypassing the oil drain pipe of the system, and then performing a final flushing by making the lubricating oil supplied from the lubricating oil pipe flow through the bearing part. 2. In a lubricating oil flushing device installed in a bearing of a rotating equipment that constitutes a steam turbine plant, means for blocking and opening the flow path between the lubricating oil supply pipe and the bearing, and a means upstream of the above-mentioned blocking point. A pipe line is provided for allowing the lubricating oil bypassed from the side to flow into the drain pipe of the lubricating oil circulation system, and the pipe line has a removable structure, and the opening after the pipe line is removed is provided. 1. A flushing device characterized by having a means for closing.