RU2544020C1 - Method of mounting inner inserts of turbine casing of gas compressor unit - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: when mounting inner inserts of a turbine casing of a gas compressor unit, upper and lower inner inserts are installed into the turbine casing via a horizontal slot and a combustion chamber. Prior to mounting the lower insert is cut horizontally into the top part connected to the upper insert and the bottom part cut vertically as per symmetry axes into four fragments with further assembly. The horizontal cut of the lower insert is made above the clamp bands of the turbine casing, and the dimensions of the produced parts allow for the installation of the top part of the lower insert without the turbine casing clamp being demounted.

EFFECT: invention allows for the simplification of inner insert mounting beyond the factory and for the reduction of labour content.

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Description

The invention relates to the field of turbine engineering, namely, to repair work of double-casing turbines, where quick replacement of inserts unloading the external turbine casing from the temperature influence of the working fluid is required.

A known method of mounting the inner casing and inserting a turbomachine (author's certificate. USSR No. 404956, class F01D 25/216, 10/22/73), comprising one-piece rings made in the form of ferrules with grooves on the inner surface that are strained using ring end-face centering protrusions, which form assembled annular grooves for mounting the diaphragms.

However, the assembly of this design is carried out in a vertical position due to the absence of a horizontal connector in the components of the insert, which requires large installation labor, as well as an increase in the insert installation time associated with the need to dismantle the combustion chamber of the turbine for dismantling the insert, as well as dismantling the lower part turbine housing.

Closest to the claimed invention by technical essence is a method of mounting the inner inserts of the turbine housing of the gas pumping unit (Patent RU, No. 2144640, class F01D 25/26, 01/10/1999), consisting of installing the upper insert in the turbine cover and the lower insert in the housing turbines, while the lower insert is cut horizontally into equal parts, and the lower part, in turn, is cut vertically along the symmetry axes into four fragments, and the upper part is cut in the side surface for the insert to pass through the screed turbine casing, then the upper part of the lower insert and four fragments of its lower part are brought into the turbine casing and the upper insert is installed in the lower one.

However, this installation method is convenient in the factory, when the housing screed and the combustion chamber are not yet installed, but when replacing the insert during repair, in the conditions of the compressor station, preliminary dismantling of the housing screed and the combustion chamber is necessary, which is difficult and time-consuming work.

The proposed method of mounting the inner inserts of the turbine housing allows you to install the upper half of the lower insert without dismantling the coupler of the turbine housing and makes it possible to install the lower part of the insert, which allows quick repairs in the conditions of the compressor station without additional cutouts of the side surface.

The invention is aimed at simplifying the installation of internal inserts outside the factory and reducing the complexity.

The technical result is achieved by the fact that in the method of mounting the inner inserts of the turbine housing of the gas pumping unit, which consists in installing the upper and lower inner inserts in the turbine housing through a horizontal connector and a combustion chamber, and before installation, the lower insert is cut horizontally into the upper part that is joined to the upper insert, and the lower part, vertically cut into four fragments with subsequent connection, a horizontal section of the lower insert is performed above the coupler of the turbine casing.

The method is illustrated by drawings, where

in FIG. 1 shows the connection diagram of the inserts, their horizontal connector and the cut line of the lower insert;

in FIG. 2 shows a diagram of a coupler of a turbine housing;

in FIG. 3 shows the upper part of the lower insert;

in FIG. 4 shows the lower part of the lower insert, cut into four fragments along the axes of its symmetry.

The two-casing turbine has an outer casing 1 and an inner casing in the form of upper and lower inserts 2, 3.

The upper and lower inserts 2, 3 serve to organize the supply of the working fluid from the combustion chamber 4 to the turbine, as well as to protect the outer casing 1 from the temperature effects of the working fluid. Both turbine bodies have a horizontal connector 5 to ensure collectability.

In conditions of repair, the screed 6 of the turbine housing is not subjected to preliminary dismantling. The bottom insert 3 is cut horizontally into two parts 7 and 8 - the upper and lower.

A horizontal section 9 is performed above the coupler 6 of the turbine housing to obtain parts 7, 8, the dimensions of which allow the installation of the upper part 7 of the lower insert 3 from the side of the connector 5 of the turbine housing, and the lower part 8 of the lower insert 3 through the combustion chamber. The lower part 8 of the lower insert 3 is preliminarily cut vertically along the axes of symmetry into four fragments.

The replacement of the inserts is as follows.

Through the horizontal connector 5, first the upper part 7 of the lower insert 3 is started, and then the upper insert 2 is mounted on it.

After that, fragments of the lower part 8 of the lower insert 3 are installed through the combustion chamber 4 and welding is performed at the junction of all parts and fragments.

Thus, performing a horizontal cut of the lower insert above the turbine housing coupler with the formation of parts that allow easy passage through the turbine housing coupler, requires no additional side holes and its dismantling, which greatly facilitates and reduces the time required to replace the internal inserts of the gas pumping turbine housing unit.

Claims (1)

The method of mounting the internal inserts of the turbine housing of the gas pumping unit, which consists in installing the upper and lower internal inserts in the turbine housing through a horizontal connector and a combustion chamber, and before installation, the lower insert is cut horizontally into an upper part that fits into the upper insert and a lower part vertically cut in the axes of symmetry into four fragments with the subsequent connection, characterized in that a horizontal section of the lower insert is performed above the coupler of the turbine housing, while the dimensions of the sample These parts are such that they allow the installation of the upper part of the lower insert without dismantling the coupler of the turbine housing.

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