CN2477833Y

CN2477833Y - Extraction check device for turbo-set

Info

Publication number: CN2477833Y
Application number: CN 01225852
Authority: CN
Inventors: 石占山
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-30
Filing date: 2001-05-30
Publication date: 2002-02-20
Anticipated expiration: 2011-05-30

Abstract

The utility model discloses an extraction-type steam baffling device for a steam turbine set. The device consists of a cavity-type steam baffling plate (3) arranged between a bearing box (2) and cylinders (4, 5), and an extraction steam pipe (8) communicated with the steam baffling plate (3) and connected with a blower (7). The cavity-type steam baffling plate is enclosed by a main sealing plate and an end sealing plate to form an internal cavity, the cavity is provided with an adjustable sealing plate and a red copper strip, and the end plate of the cavity is equipped with an extraction hole. The utility model prevents steam from entering the bearing box, and thus completely solves the problem that the lubricating oil of a steam turbine set is mixed with water, and ensures the operating safety of the steam turbine set.

Description

The steam-extracting type sream check device that is used for steam turbine set

The utility model belongs to the steam turbine class, relates to a kind of for preventing or reduce the sream check device of steam turbine set internal lubrication oil mixed with water.

Existing Large Steam Turbine Sets gland leak-off is big, and serious band water has not only caused huge waste in the lubricant oil, and makes adjusting parts generation corrosion, has a strong impact on the safe operation of unit, has become a great problem of steam turbine industry.Lubricated oil mixed with water is to be little negative pressure owing in the bearing housing, and the steam that spills from packing has higher speed and pressure, and these steam flows are easy to seal in the bearing housing, make lubricant oil band water.Therefore, the structure of existing steam turbine set, the shortcoming that is difficult to avoid lubricating oil mixed with water.

The purpose of this utility model is in order to overcome the shortcoming of prior art, to propose a kind of steam-extracting type sream check device that is used for steam turbine set, can prevent that steam from entering bearing housing, thereby thoroughly solve the lubricant oil water phenomenon, guaranteeing the security of operation of steam turbine set.

The utility model takes following technological scheme to realize its purpose.A kind of steam-extracting type sream check device that is used for steam turbine set is by being installed in cavity type steam retaining plate between bearing housing and the cylinder, being communicated with cavity type steam retaining plate and forming with the extraction steam pipe that blower fan joins.Cavity type steam retaining plate is connected to form closed cavity by primary seal plate and end seal plate, adjustable sealing plate is housed in the chamber, and adjustable sealing plate connects with the static and dynamic sealing sheet, and adjusting screw one end and adjustable sealing plate connect, the other end is installed on the primary seal plate, offers steam absorbing hole on the end seal plate.The extraction steam pipe that is communicated with blower fan is connected the side of primary seal plate.Cavity type steam retaining plate is the midsplit type structure, and promptly the center line along turbine spindle is divided into laterally zygomorphic two-part, and has lap to overlap, and connects with screw.End seal plate is the midsplit type structure also, and has the lap overlap joint to connect with screw; Steam absorbing hole on the end seal plate be distributed on apart near the axis hole around on.The static and dynamic sealing plate is a copper plate, and copper coin is made bilayer, and copper coin is made bladed with the synapsis that is coupling.

Advantage of the present utility model:

1, since between the intermediate pressure cylinder of steam turbine set and high-pressure cylinder and the bearing housing design and installation a kind of steam-extracting type steam retaining plate, and be communicated with a typhoon machine, blower fan is pumped into negative pressure with the inner chamber of steam retaining plate, when the packing leak-off steam, can flow into the steam retaining plate chamber by steam absorbing hole, discharge by blower fan then.Therefore, thoroughly solve the problem of lubricant oil band water, thereby prevented and reduced the corrosion of unit component, guaranteed the safe operation of unit.

2, because the cavity type steam retaining plate interface is airtight, and take overlapping bridging arrangement, therefore, guaranteed that sealing is tight; Owing in the steam retaining plate chamber adjustable sealing plate is housed, can adjust its seal clearance by adjusting screw, guaranteed the good effect of drawing gas.

3, because the static and dynamic sealing sheet adopts copper plate, can prevent to rub between the sound, guarantee dynamic and static gaps.

4, owing to offer a plurality of steam absorbing holes equably on the end seal plate, guaranteed that steam flows in the steam retaining plate chamber equably, discharges by blower fan.

Below by embodiment, further specify in conjunction with the accompanying drawings.

Fig. 1 is a kind of system diagram that is used for the steam-extracting type sream check device of steam turbine set;

Fig. 2 is the plan view of cavity type steam retaining plate structure;

Fig. 3 is the A-A sectional view of Fig. 2.

As shown in Figure 1, a kind of steam-extracting type sream check device that is used for steam turbine set is that 4 cavity type steam retaining plates 3 are installed between the bearing housing on the main shaft 12 and intermediate cylinder 4, high pressure cylinder 5, with extraction steam pipe 8 cavity type steam retaining plate 3 is communicated with blower fan 7, installs valve 6 before the blower fan additional.

Shown in Fig. 2,3, cavity type steam retaining plate 3 is connected to form airtight inner chamber by primary seal plate 3-1 and end seal plate 3-2, and adjustable sealing plate 3-3 is housed in the chamber; Adjustable sealing plate is connected with static and dynamic sealing sheet 3-4 with main shaft 1 contacting point, and the static and dynamic sealing sheet is a copper plate; The end of adjusting screw 3-5 is connected with adjustable sealing plate 3-3, and the other end is installed in the side of primary seal plate 3-1; Offer steam absorbing hole 3-6 on the end seal plate 3-2.The extraction steam pipe 8 that is communicated with blower fan 7 is from the side connection of primary seal plate 3-1.Cavity type steam retaining plate 3 is the midsplit type structure, is that the center line along turbine spindle 1 is divided into laterally zygomorphic two-part, and has lap 3-7 to overlap, and connects with screw 3-8.End seal plate 3-2 is the midsplit type structure also, and lap overlap joint is arranged, and connects with screw, and the steam absorbing hole 3-6 on it is distributed on the circumference at axis hole 10mm place, offers diameter altogether and be 30 of the steam absorbing holes of 3mm.Steam retaining plate is made of the thick steel plate of 2mm, but its interface welded closure.Copper plate 3-4 is making bladed with axle 1 contacting point, and available rivet is fixed on the steel plate, and copper plate is double-deck, and interlayer has the 3mm gap.

Claims

1, a kind of steam-extracting type sream check device that is used for steam turbine set, it is characterized in that described sream check device by the cavity type steam retaining plate (3) that is installed between bearing housing (2) and the cylinder (4,5), be communicated with cavity type steam retaining plate (3) and form with the extraction steam pipe (8) that blower fan (7) joins.

2, according to the described steam-extracting type sream check device of claim 1, it is characterized in that described cavity type steam retaining plate (3) is connected to form inner chamber by primary seal plate (3-1) and end seal plate (3-2), adjustable sealing plate (3-3) is housed in the chamber, adjustable sealing plate is connected with static and dynamic sealing sheet (3-4) with main shaft (1) contacting point, one end of adjusting screw (3-5) and adjustable sealing plate connect, the other end is installed in the side of primary seal plate, offer steam absorbing hole (3-6) on the end seal plate, the extraction steam pipe (8) that is communicated with blower fan (7) is communicated with from the side of primary seal plate (3-1).

3, according to the described steam-extracting type sream check device of claim 1, it is characterized in that described cavity type steam retaining plate (3) is divided into laterally zygomorphic two-part along the center line of turbine shaft (1), laying equal stress on to be stacked with is connected together.

4,, it is characterized in that the steam absorbing hole (3-6) on the described end seal plate (3-2) is distributed near the circumference the axis hole according to the described steam-extracting type sream check device of claim 1.

5, according to the described steam-extracting type sream check device of claim 1, it is characterized in that described static and dynamic sealing sheet (3-4) is a copper plate, copper coin is made bilayer, and copper coin is made bladed with the synapsis that is coupling.