JPH068602B2 - Flushing method and flushing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for flushing and cleaning a system in which lubricating oil is circulated by pressure feeding to a bearing portion of rotating equipment constituting a steam turbine plant, and the above. The present invention relates to a flushing apparatus suitable for carrying out the method of.

[Background of the Invention]

Fig. 3 shows an oil system diagram of the steam turbine plant. Oil system is usually oil tank 1, main oil pump (turbine shaft drive)
2, auxiliary oil pump (electric motor drive) 3, booster pump (oil turbine drive) 4, lubricating oil supply pipe 5, bearing 6, control oil supply oil pipe 7, control device 8, drain pipe 9, oil cooler 10 It is configured.

When the operation is started in a normal state, the auxiliary oil pump 3 supplies oil to the bearing 6 and the control device 8 until the turbine speeds up to near the rated speed and the discharge pressure of the main oil pump 2 increases. . FIG. 4 is a cross-sectional view showing details of the method of refueling the bearing portion. The oil is supplied to the bearing metal 13 through the orifice box 11 and the orifice plate 12.
The drain oil is collected by the bearing box 14 and returned to the oil tank by the drain pipe 9.

In such an oil system, if solid foreign matter is contained in each pipe, equipment or oil, the bearing or the control equipment will be damaged. Therefore, after the completion of the installation of the equipment or the reassembly after the open inspection, oil flushing is performed because it is necessary to keep the oil system clean before starting the operation.

The oil flushing is the auxiliary oil pump 3 shown in FIG.
Is operated to circulate the oil throughout the oil system, a filter (not shown in FIG. 3) is provided in the middle of the system, and the oil is passed by the filter.

Regarding the necessity of preventing foreign matter from entering the lubricating oil, thermal power generation Vo127 No. 5 (MAY. 19
76), Hiromu Mimuro and Hiromasa Ichikawa, "Effects of bearing scratches on journals" (p. 410).

For examples of refueling systems, refer to "Turbine Generator Course" (published by the Thermal Power Generation Technology Association in April 1978).
Page 72 of the above, the flooding for the refueling system is described in Thermal Nuclear Power Vol 26 No. 4 (APr. 1).
975), “It is the final stage of construction work,” as shown in “Experience of Shimane Nuclear Power Plant Construction and Trial Operation” pp. 366-367 by K. Niki et al. And Taniguchi.

Further, even when the steam turbine plant is regularly or temporarily subjected to large overhaul and reassembled, the flushing is performed before the restart of the operation.

FIG. 5 shows a conventional oil flushing method, and is an explanatory view of the oil flushing method in the bearing portion and the excess oil method. 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 flows out from the upper part of the bypass device 15 through the bypass pipe 16 into the bearing housing 14. A bypass device 16 is attached to the tip of the bypass pipe 16, and in the conventional flushing method described with reference to FIG. 5, flushing lubricating oil pressure-fed from the lubricating oil supply pipe 5 is injected into the bearing box 14. Since the oil is discharged to the oil drain pipe 9, the flushing work can be performed only after the assembly and adjustment work of the bearing 13 in the bearing housing 14 is completed. Therefore, there is a problem that the whole construction period becomes long.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and provides a flashing method capable of advancing the flashing operation in parallel with the assembling and adjusting operation of the bearing portion, and a flashing apparatus suitable for carrying out the flashing method. Then, it is intended to contribute to shortening the whole construction period of the work involving flushing.

[Outline of Invention]

A flashing method according to the present invention created to achieve the above object is a method for flashing a lubricating oil circulation system of a bearing portion of each rotating device that constitutes a steam turbine plant. After performing the preliminary flushing of the piping system by bypassing the lubricating oil supplied to the exhaust oil pipe of the lubricating oil circulation system, the lubricating oil supplied from the lubricating oil pipe is circulated to the bearing portion for finishing flushing. It is characterized by performing.

Further, the flashing device of the present invention created so as to easily carry out the above method and sufficiently exert its effect is
In the lubricating oil flushing device provided in the bearing portion of the rotating equipment that constitutes the steam turbine plant, means for blocking / opening the flow path between the lubricating oil supply pipe and the bearing portion,
A pipe line is provided for allowing the lubricating oil bypassed from the upstream side of the cutoff point to flow into the drain pipe of the lubricating oil circulation system, and the pipe line has a detachable structure. It is characterized by having a means for closing the opening after being removed.

However, in the present invention, the term “lubricating oil” is a general term for fats and oils that circulate in a lubricating system, and it is meant to include flushing oil.

Example of Invention

1 and 2 show one embodiment of a flushing apparatus of the present invention configured to carry out the flushing method of the present invention. FIG. 1 is a state in which preliminary flushing is being performed, and FIG. 2 is finishing flushing. I am drawing the state of going.

This embodiment is an improvement of the conventional device shown in FIG. 5 by applying the device of the present invention, and the same reference numerals as those in FIG. 5 are the same as or similar to those in the prior art. It is a constituent part.

The oil drain pipe 9 is provided with a chamber 18 in which the excess device 1 is installed.
Store 7 '. On the other hand, the bypass device 15 attached to the orifice box 11 closes the port P. The port P
Lubricating oil is bypassed from the upstream side by means of a hose 16 ', and this is recirculated to the oil discharge pipe 9 through the above-mentioned passing device 17'.

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

When the lubricating oil is circulated in this manner, the lubricating oil flows into the oil discharge pipe 9 through the bypass device 15, the hose 16 'and the passing device 17', and the passing device 17 'captures and removes solid foreign matter. To be done.

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

When the assembly and adjustment of the bearing portion is completed, the hose 16 'connected to the chamber 18 is removed and connected to the excess device 17 in the bearing box 14 as shown in FIG. 2, and the chamber 18 is closed with the lid 19'. When the lid 19 that has blocked the communication between the oil drain pipe 9 and the bearing box 14 is removed, the state in which the lid 19 functions similarly to the conventional flushing device shown in FIG. This second
Finish flushing is performed in the state shown in the figure.

Since the preliminary flushing of the long lubricating oil circulation line has already been completed, the finishing flushing (Fig. 2) is completed in a short time.

As a result, the work period of installation work or periodic disassembly inspection and reassembly work can be shortened, and the machinery and equipment can be operated quickly and economically operated.

In other words, if the oil flushing according to the present invention is performed, the preliminary flushing can be performed in parallel with the assembly work for a sufficient time, and the oil flushing after the completion of all the work can be completed in a short time. Become. In the conventional oil flushing, after entering the oil flushing after all the work is completed, it is necessary to take a long time to clean the oil, but the present invention eliminates the drawback.

〔The invention's effect〕

As described above in detail, according to the method of the present invention, the preliminary flushing of the pipe portion can be performed in parallel with the assembling and adjusting work of the bearing portion, which can contribute to the reduction of the whole construction period. Also,
When the apparatus of the present invention is applied, the above method can be easily carried out and its effect can be sufficiently exhibited.

[Brief description of drawings]

1 and 2 show a cross section of the device of the present invention. FIG. 1 shows a state in which preliminary flushing is performed, and FIG. 2 shows a state in which finishing flushing is performed. FIG. 3 is a lubrication system diagram of a steam turbine plant. FIG. 4 is a cross-sectional view for explaining the structure of a conventional bearing portion, and FIG. 5 is a cross-sectional view of a conventional flashing device. 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 device, 9 ... Oil drain pipe, 10 ... Oil cooler, 11 ... Orifice box, 12 ... Orifice plate, 13 ... Bearing, 14 ... Bearing box, 15 ... Bypass device, 16 ... Hose, 17 , 17 '... Passing device, 18 ... Chamber, 19, 19' ... Lid.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Moriya 3-1-1, Saiwaicho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi factory (72) Inventor Hirobo Suzuki 2 Aize-cho, Hitachi-shi, Ibaraki 9-1 No. 1 within Hitachi Service Engineering Co., Ltd. (56) References Shokai Sho 60-177395 (JP, U)

Claims (2)

[Claims] 1. A method for flushing a lubricating oil circulation system of a bearing portion of each rotating device constituting a steam turbine plant, wherein the lubricating oil supplied from the lubricating oil supply pipe to the bearing portion is discharged from the lubricating oil system. A flushing method comprising performing a preliminary flushing of a piping system by bypassing an oil pipe, and then performing a finishing flushing by circulating the lubricating oil supplied from the lubricating oil pipe to a bearing portion. 2. A lubricating oil flushing device provided in a bearing portion of a rotary machine constituting a steam turbine plant, and a means for blocking / opening a flow path between the lubricating oil supply pipe and the bearing portion, and the above blocking. A pipe line is provided for allowing the lubricating oil bypassed from the upstream side of the location to flow into the drain pipe of the lubricating oil circulation system, and the above-mentioned pipe line has a detachable structure, and after the pipe line is removed. And a means for closing the opening of the flashing device.