RU18287U1 - UNIT OF CONDENSATION STEAM TURBINE ON FRAME - Google Patents

Abstract

1. A condensing steam turbine unit on a frame in which the turbine is single-cylinder and single-flow with an exhaust chamber and at least one outlet pipe for communicating with a condenser extending from it, and the frame on which it is mounted contains longitudinal and transverse beams, characterized in that the outlet pipe is located laterally and is made tapering from the exhaust chamber to the longitudinal beam of the frame, passing above it, and the area of the exhaust chamber at its bottom is equipped with a drainage pipe passing through the outlet Hole in the longitudinal beam. 2. The turbine block according to claim 1, characterized in that the area of the exhaust chamber at its bottom above the inlet of the drainage tube is blocked by a perforated screen.

Description

FRAME OF CONDENSATION STEAM TURBRISH ON THE FRAME

The useful model belongs to the field of turbine engineering, and its object is a condensing steam turbine unit on the frame, i.e. such a unit, which is assembled transported from the manufacturer to the assembly site of the machine room.

Block supply of turbines is less common than supplying a turbine with individual assembly units assembled on the foundation frames of the machine room. Block delivery allows to reduce the transport cycle and the installation time of the turbine in the engine room, however, the possibilities of such a design of the turbine and its delivery are limited by the permissible transport dimensions. In addition, the layout capabilities of the turbine installation, in particular, the relative position of the turbine and the condenser, are also limited.

Of the known layout schemes, the main ones are the following three: with the basement of the condenser (1), with the axial location of the condenser - in line with the turbine shaft (2), with the lateral arrangement of the condensers (3). The first of these schemes requires significant investment costs for the construction and equipment of the basement. According to the second option, the length of the turbine installation is significantly increased, and in addition, the placement of the rear support inside the steam outlet between the exhaust chamber and the condenser

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complicates access to this support and its maintenance. The last of these options is free from the disadvantages of the first two and in many cases is preferred.

For turbines with a block design on the frame, an arrangement with a basement of the condenser (4) is used and there is information about the use of the arrangement with an axial arrangement of the condenser. The layout with a lateral arrangement is not applied, which is caused by problems in the output of outlet pipes through a frame with longitudinal beams.

The creation of this utility model, the closest analogue of which is the aforementioned block of a single-cylinder turbine with an exhaust chamber and an outlet pipe to a frame with longitudinal beams (4), is tasked with such a design of this block that it can be assembled with one or two symmetrically located side capacitors.

This problem is solved in a condensing steam turbine unit on a frame in which the turbine is made single-cylinder and single-threaded with an exhaust chamber and departing from it, with at least one from it, an outlet pipe for communication with a condenser, and a frame with longitudinal beams, and in which , in accordance with the essence of the solution, the outlet pipe is located in the lateral direction and is made tapering from the exhaust chamber to the longitudinal beam of the frame, passing above it, and the zone

the exhaust chamber at its bottom is equipped with a drainage pipe,

passing through a hole in the longitudinal beam.

The specified embodiment of the outlet pipe makes it possible to articulate it with a side condenser, falling into the permissible transport dimension in height, and the presence of a drainage pipe allows condensate moisture to be removed, accumulating at the bottom of the exhaust chamber due to the narrowing of the outlet pipe.

In order to prevent the condensate moisture from being trapped by the vortex in the exhaust chamber and to be thrown into the turbine blade apparatus, in particular at low flow rate, it is preferable that the area of the exhaust chamber at its bottom above the inlet of the drainage tube be covered with a perforated screen.

A turbine installation with a utility model according to the stated essence can be performed with either one side condenser or two symmetrically arranged, as is done in turbine installations with turbines mounted on foundation frames in the engine room. Moreover, the design of the turbine with two symmetric and oppositely directed nozzles, despite the narrowing of their sections, will increase the uniformity of the vapor pressure in the exhaust chamber and achieve a higher degree of pressure recovery in the outlet nozzles. showing a general view of a turbine unit with a condensing unit

a steam turbine on the frame and side condensers, from the side of the rear support bearing of the turbine.

The described example relates to a unit of a single-cylinder condensing steam turbine 1, comprising a front outboard bearing (not shown in the drawing) and a rear mounted or outboard bearing 2. The turbine flow section is single-flow with an exhaust chamber located behind the low-pressure part (NPP) 3. Exhaust chamber 3 has two symmetrically located lateral nozzles 4. The turbine is mounted on a support frame with transverse 5 and longitudinal 6 beams. The turbine is supported on this frame by the front bearing and paws of the cylinder 7 at the exhaust chamber 3. The turbine is connected to two symmetrically located side condensers 8. The connection of the outlet pipes 4 to the necks of the condensers 8 is made through lens compensators 9.

In this turbine installation, in accordance with the essence of the utility model, the outlet pipes of 4 tons of turbine, as can be seen from the drawing, are made with a tapering section from the exhaust chamber 3 to the longitudinal beams 7 of the frame and pass above them, and the area 10 of the exhaust chamber 3 at its bottom is equipped with outlet drainage tubes 11 passing through holes in

longitudinal beams 6. In this case, zone 10 is blocked by a perforated screen 12 located above the inlet openings of the drainage tubes 11.

- And the holes in this screen are of such dimensions that do not interfere

the passage of condensate moisture through the screen 12 and its runoff to the bottom of the exhaust chamber 3, but prevent the entrainment of particles of condensate moisture by vortex flows.

The described condensate steam turbine unit is assembled on a frame, tested and adjusted in detail and by industrial methods at the manufacturer, and then transported and installed in the machine room using conventional lifting and mounting means. After that, in the engine room, the turbine is connected with the outlet pipes with the mouths of the capacitors

Sources of information cited in the description.

1. A.D. Trukhny, S. M. Losev. Stationary steam turbines. M. 1981, p. 165, Fig.6.7.

2.R.Srsanekamp. Commercial energy projects reach a high level. “Powen, 2000, .№1, p. 39.

3.See source 1, p. 265, fig. 7.55.

4. Prospect AO LMZ. Steam turbines K-40. 2000 year

Claims (2)

1. A condensing steam turbine unit on a frame in which the turbine is single-cylinder and single-flow with an exhaust chamber and at least one outlet pipe for communicating with a condenser extending from it, and the frame on which it is mounted contains longitudinal and transverse beams, characterized in that the outlet pipe is located laterally and is made tapering from the exhaust chamber to the longitudinal beam of the frame, passing above it, and the area of the exhaust chamber at its bottom is equipped with a drainage pipe passing through the outlet Fur in the longitudinal beam. 2. The turbine block according to claim 1, characterized in that the area of the exhaust chamber at its bottom above the inlet of the drainage tube is blocked by a perforated screen.