RU13816U1 - STEAM TURBINE INSTALLATION - Google Patents

Abstract

A steam turbine installation comprising high, medium and low pressure cylinders with fixed points and paws, thrust and thrust bearings, which together with the housings are mounted on fixed bearings, characterized in that the high and medium pressure cylinders are combined, the fixed-point combined the cylinder of high and medium pressure is made in the form of a swivel, consisting of rods connected by a cylindrical rod, the axis of rotation of which coincides with the vertical plane of symmetry of the combined cylinder high and medium pressure and paws of all the cylinders are movably mounted on the bearing housings.

Description

Parot

The utility model relates to the field of turbine engineering and is intended for use in high-power twin-cylinder turbines.

Known steam turbine installation (A.V. Shcheglyaeva PT-140/160 M. Energoatomizdat 1993. Volume 2. P.373), containing a high-pressure cylinder and combined medium and low pressure cylinders.

However, this device is not reliable.

The closest in technical essence to the proposed utility model is a steam turbine installation (RF patent No. 1712632 IPC F01D25 / 28, publ. BI JNfe 6-92), containing high and medium pressure cylinders, one of the legs of which are rigidly fixed to the housing of the common bearing, and others are mounted on individual bearing housings, while the common and individual bearing housings are mounted on fixed bearings and rigidly fastened to the fixed bearings. The paws of the cylinders on the housings of individual bearings are installed with the possibility of movement through the housings. The fixed points of the cylinders are organized by fixing the legs, resting on a common bearing in the axial direction, using transverse keys.

However, such devices have low reliability, because If the cylinder bodies of the high and medium pressure turbines are not symmetrically heated, the vertical torque from the side of the cylinder bodies will act on the common bearing housing.

The technical task of the proposed utility model is to increase reliability.

This task is achieved by the fact that in the known steam turbine installation containing cylinders of high medium and low pressure, with fixed points and paws, thrust and thrust bearings, which together with the housings are mounted on fixed bearings, high and

IPC F01D25 / 28

medium pressure are made aligned, the fixed-point of the combined cylinder of high and medium pressure is made in the form of a swivel consisting of rods connected by a cylindrical rod, the axis of rotation of which coincides with the vertical plane of symmetry of the combined cylinder of high and medium pressure, and the legs of all cylinders are mounted to move along bearing housings.

The essence of the utility model is illustrated by drawings, where FIG. 1 is a diagram of a steam turbine installation, FIG. 2 is a top view of a steam turbine installation, in FIG. 3 shows a fixed point.

The steam turbine installation comprises a combined high and medium pressure cylinder 1 and a low pressure cylinder 2, each of which has, respectively, a fixed point 3 and 4, vertical keys 5, legs 6 that rest on the bearings 7 (or foundation 8) of the bearings 9 and thrust bearing 10. The rotor And the turbine is installed in the thrust bearing 10 and the thrust bearings 9. High, medium and low pressure cylinders having a vertical plane of symmetry 12. Fix point 3 is made in the form of a hinge joint and consists of rods 13 and a cylindrical rod 14 connecting them to the axis of rotation 15, which is located in the vertical plane of symmetry 12 of the combined high and medium pressure cylinder. The rods 13 are rigidly, for example by welding, one of which is connected to the cylinder of high and medium pressure 1, and the other to the housing 7 of the thrust bearing 10.

Steam turbine works as follows.

During the operation of the steam turbine installation, thermal expansion of the high, medium and low pressure cylinders 1 and 2, as well as the rotor 11 occurs. Since each cylinder has its own fixed point 3 or 4 and does not come into contact with the adjacent cylinder during the expansion process, the movements of the cylinders 1 and 2 are independent of each other. Bearings 9 and 10 due to their rigid fastening on the fixed bearings remain in place. With the location of the thrust bearing 10 between the cylinders 1 and 2 of the turbine, as well as the location of the fixed points 3 and 4 in close proximity to the thrust bearing 10, it is possible to match the thermal expansions of the rotor 11 and cylinders 1 and 2. Combined cylinder of high and medium pressure 1 expands unobtrusively relative to the fixed point 3 in any direction within the gap of the vertical keys 5. When asymmetric thermal deformations of the cylinder of high and medium pressure 1 occur, it does not create a vertical s krutyash; their moments bearing housings 7 and 9 and 10 in the recess zapschmlyaetsya vertical key 5, as all the clutches 6 cylinders 1 and 2 are based on the bearing housing 7 and 9 and 10 without fixation limits movement in a horizontal plane.

Claims (1)

A steam turbine installation comprising high, medium and low pressure cylinders with fixed points and paws, thrust and thrust bearings, which together with the housings are mounted on fixed bearings, characterized in that the high and medium pressure cylinders are combined, the fixed-point combined the cylinder of high and medium pressure is made in the form of a swivel, consisting of rods connected by a cylindrical rod, the axis of rotation of which coincides with the vertical plane of symmetry of the combined cylinder high and medium pressure and paws of all the cylinders are movably mounted on the bearing housings.