RU10421U1 - STEAM TURBINE - Google Patents

Description

The utility model relates to the field of turbine engineering and can be used in the design and modernization of steam turbines.

A well-known steam turbine, including a cylinder for flowing / h hour Tszm high and medium pressure, with inlet and outlet parts and with production and heating and / or selection, type PT / A. B, Shcheglyaev, Steam Turbines, Energy, M, 1976, pp. 344-347 /.

A disadvantage of the known steam turbine is the tight connection of the parameters of the selection to the consumer with the design. turbines, which limits the performance of the turbine unit.

Known steam turbine, including with a flow part, with VHO. DONZH and output, parts and systeg / iy steam distribution with a bypass device at the input / A.V. Scheglyaev Steam turbines. Energy, M. 1976, p. 335 / - Prototype.

A disadvantage of the known steam turbine is that when switching to previously unforeseen conditions, the operating conditions are those that cause unacceptable loads on individual stages of the turbine or shield. In particular, when the pressure decreases behind the turbine, or by any compartment (cylinder), at the last stages of the turbine or compartment (cylinder), increased steam forces against the blade, apparatus and diaphragm increase, as well as axial force, and the axial force on the thrust bearing changes.

The claimed solution allows to reduce the load on the turbine stage by reducing the steam flow through the most loaded stage compartment (cylinder) or the turbine as a whole. Moreover, a decrease in steam flow through the most loaded stages leads to yi / ieHb}, Шг

PIC: R01D 1/04

STEAM TURBIA

patches) and reduce stress in them, and, consequently, to increase the strength and reliability of the stages, turbines. This makes it possible, without changing the flow part, to significantly expand the range of operation of the world. In this case, the valve pan allows for variable modes to control the flow of steam through the flow part and to implement eco-friendly. Crash work.

The proposed solution can be used in the modernization of turbines to increase the versatility of equipment, expand its functional capacity.

A steam turbine is proposed, including a cylinder with a flowing part, with an input and output part, and with an inlet device. In front of the most loaded stages1 of the flowing part, bypass devices are installed, made, for example, in the form of valves or (and) a system of holes. At the same time, a throttling diaphragm can be installed on the output part of the turbine.

The utility model is illustrated by drawings, in which Fig. 1 shows a longitudinal section of a turbine; figure 2 - bypass device made in the form of a valve and

hole systems .;

in Fig.3 - bypass device made in the form of a valve; figure 4 - bypass device, made in the form of a system

holes .;

on Fig, 5 - installation. throttling diaphragm on the output of the turbine.

The steam turbine includes a cylinder I with a flow part 2 and an inlet. 3 and day off. 4 parts with a bypass device 5 at the inlet 3. In front of the most loaded stage 1УШ flowing, part 2, bypass devices are installed, made, for example, in the form of a valve 6 and a system of openings 7, or in the form of a claranza or system of openings 9.

At the same time, a throttling diaphragm 10 is installed at the input, part of the turbine s

Steam turbine operates as follows.

Steam is piped from the boiler through the inlet part 3 to the flow part 2. If it is necessary to pass the maximum flow of steam, the steam is bypassed the first stages through the bypass device 5 to the flow part 2. Before the most loaded steps of the flow part 2, the steam is transferred to the output part 4 or for any intermediate compartment through the bypass valve 6 and the hole system 7, or through the valve 8, il1 through the hole system 9.

During operation, the throttling diaphragm 10 provides the necessary (according to strength 1) pressure behind the last stage.

Claims (2)

1. A steam turbine, including a cylinder with a flow part, with an input and output parts and with a bypass device at the input, characterized in that overflow devices are installed in front of the most loaded steps of the flow part, made, for example, in the form of valves or (and) aperture system . 2. The turbine according to claim 1, characterized in that a throttling diaphragm is installed at the outlet of the turbine.