The turbine

 

(57) Abstract:

The invention relates to the field of power engineering and can be used in steam turbine plants with a double-flow low-pressure cylinder (LPT). The turbine contains a two-line double cylinder low pressure with two output pipes, chambers of steam extraction from its inner and outer housings, respectively, during the second condensate heater low pressure and in the first as the condensate low pressure heater, condenser with two reduction nozzles, each of which is connected with the corresponding outlet pipe of the low pressure cylinder. Camera selection a pair of first low pressure heater placed between the inner and outer housings and made common to both the flowing parts of the low pressure cylinder. The chambers are made with coaxial pipes of steam extraction, placed between the output connections of the low pressure cylinder. When this nozzle selection of steam to the second heater is inside the nozzle selection of steam to the first heater. Heaters placed between the transition pipe of the condenser, and the first heater is placed above the second Noah axis of the tube bundles. In the turbine the drain line, at least one heater low pressure passes inside the body of the capacitor in its steam space and communicated with him through the water seal. This embodiment of the turbine will provide layout heaters low pressure with different parameters selected from the cylinder low-pressure vapor within the dimensions of the cross section of the capacitor, reducing the length of the path of extraction steam to the low pressure heater by reducing metal consumption, simplifying the design of the low-pressure turbine, the efficiency of the low pressure heater. 2 C.p. f-crystals, 3 ill.

The invention relates to a power system and can be used in the turbine with a double-flow low-pressure cylinder (LPT).

Known extraction turbine containing a double hull structure with Protvino chamber in the inner housing is in communication with the low pressure heater (HDPE) placed between the transition pipe of the condenser, each of which is communicated with the corresponding outlet pipe module, the capacitor has two transverse relative to the axis of the main turbine is every tube bundle [1].

This design provides a layout of one IPA within the transverse dimensions of the condenser for the turbine with one extraction steam from the low-pressure cylinders, which simplifies the turbine due to the lack of long steam lines to the PND.

Reducing the length of the tract, indicating IPA with Protvino camera module, increases the efficiency of the turbine.

Known turbine adopted for the prototype, containing double-flow low-pressure double-hulled design, with the camera selecting the pair of external enclosure module, made in the nozzle selection on the first as the condensate mon, placed in the output pipe module. Module has, in addition, the camera selection pair, made in the internal housing module communicated with the second course of the condensate HDPE pipe selection pair is placed between the output pipe module.

The capacitor module has two transitional pipe made with two tube bundles, symmetrical relative to the longitudinal axis of its body, while the capacitor is made of two-way and one independent flow in each tube bundle [2].

In the prototype of the longest pipelines to separately installed HDPE complicate the design of the turbine, uvelichivayutsya in the long steam lines for HDPE and heat losses in the pipes of steam extraction, placed in the output pipe module, where the temperature of the steam discharged into the condenser, is much lower (60-70oC) steam temperature in the path of exhaust steam to the PND.

The technical effect of the invention is the provision of a composition of HDPE with different parameters taken from the low-pressure vapor within the dimensions of the cross section of the capacitor, reducing the length of the channel pair selection for IPA in the reduction of metal consumption, simplifying the design of the low-pressure turbine, the efficiency PND.

The technical effect provided in the turbine containing a two-line double cylinder low pressure with two output pipes, chambers of steam extraction from its inner and outer housings, respectively, the second and the first as the condensate low pressure heaters, condenser with two reduction nozzles, each of which is connected with the corresponding outlet pipe of the low pressure cylinder, in which, according to the invention, the extraction steam in the first low pressure heater placed between the outer and inner housings, made common to both the flowing parts of the low pressure cylinder, the chambers are made with coaxial the selection of steam piping set on the second heater is inside the nozzle selection of steam to the first heater, heaters placed between the transition pipe of the condenser, and the first heater is placed over the second heater.

The specified execution chamber of the extraction steam of lower pressure between the inner and outer housings module, coaxial placement of the nozzles of the steam extraction for IPA from cameras, coax between the output pipe module and placing both HDPE transition between the pipes of the condenser provides the shortest path from the cameras selection of steam from low-pressure to the IPA and the layout of both the IPA within the transverse dimensions of the capacitor.

To improve the reliability of the turbine when cleaning parts of the condenser tubes without stopping the turbine condenser is made with double-flow water supply in each of the two symmetrical longitudinal axis of the tube bundles.

To reduce heat losses to the drain line at least one IPA passes inside the body of the capacitor in its steam space and communicated with him through a hydraulic lock.

The invention is illustrated by drawings, where Fig. 1 shows a General view of the low-pressure turbine in the exhaust; Fig. 2 is a view of the Fig. 1; Fig. 3 is a General view of the module.

The turbine contains a module with unuturum transitional inlet 4 condenser 5. In the inner casing 1 LPT performed chamber 6 of the first steam extraction, which his pipe 7 selection pair, placed along the axis of propusk turbine provided with a second in the course of the condensate mon 9 placed between the transition pipe 4 condenser 5. Between cases 1 and 2 LPT posted by camera 10 of the second steam extraction, communicated with the first course of the condensate HDPE pipe 11 12 covering the nozzle 7 of the chamber 6, and the exhaust pipe 13. Mon 11 with a lower pressure steam extraction posted on mon 9 with higher pressure steam extraction. Socket 7-steaming on mon 9 and the exhaust pipe 13 provided with a bellows expansion joints 14 to compensate for thermal and mechanical movements, separated by height. The pipeline 15 condensate drain heating steam from PND 9 passes into the steam space of the condenser 5, when it is placed in the Cup 16 that serves as a trap condensate is drained from the IPA to the condenser 5.

The capacitor 5 is made with two main tubular beams 8, symmetrical to its longitudinal axis, is placed across the longitudinal axis of the turbine under each of its transitional pipe 4. Each tube bundle 8 is made with a two-line input of water through the nozzles 17 water supply and accordingly TLD is iraniana pressure for left and right output sockets module 5-case of termination of the water in the portion of the tube bundle under one of the nozzles 4 of the capacitor 5, for example, when cleaning the pipes without stopping the turbine. Twin supply of water in each tube bundle must be performed for the case when due to design restrictions when placing both HDPE transition between the nozzles 4 of the capacitor area of the bore B for the passage of steam discharged on one tube bundle 8 in the area of the other of the tube bundle 8, does not provide sufficient equalization of pressure in the output pipe module disabling parts of the tubes of the tube bundle 8 condenser.

The capacitor can be made with pipe bundles along the axis of the turbine.

In the proposed design of the turbine, steam extracted from the chamber 6 flows through the flow path to the nozzle 7 in the heater PND 9 and a short way from the chamber 10 through the pipe 12 and the exhaust pipe 13 at PND 11.

In the proposed design of the turbine is provided a rational arrangement of both IPA in the area of the capacitor is within its transverse dimensions reduced the length of the paths steaming in both IPA in comparison with the prototype, and the path of the exhaust steam from the chamber of the second selection is made outside of the outlet pipe module, this results in a simpler design of the turbine, humanised the A. D. Stationary steam turbines.- M.: Energoatomizdat, 1990, 210, Fig. 5-20, 406, 407, Fig. 7-32, 408-409.

2. Truini A. D. Stationary steam turbines. -M.: Energoatomizdat, 1990, 261 - 269, Fig. 6-13, S. 206 - 208, Fig. 5-17.

1. The turbine containing a two-line double cylinder low pressure with two output pipes, chambers of steam extraction from its inner and outer housings, respectively, the second and the first as the condensate of the low pressure heater, condenser with two reduction nozzles, each of which is connected with the corresponding outlet pipe of the low pressure cylinder, characterized in that the extraction steam in the first low pressure heater placed between the outer and inner housings, made common to both the flowing parts of the low pressure cylinder, the chambers are made with coaxial pipes of steam extraction, placed between the output connections of the low pressure cylinder, when this nozzle selection of steam to the second heater is inside the nozzle selection of steam to the first heater, heaters placed between the transition pipe of the condenser, and the first heater is placed over the second heater.

3. Turbine on PP. 1 and 2, characterized in that the drain line, at least one heater low pressure passes inside the body of the capacitor in its steam space and communicated with him through the water seal.

 

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FIELD: power engineering; steam turbines.

SUBSTANCE: invention can be used at mounting of heavy-weight condensers of steam turbines connected with several exhaust ports of steam turbine low-pressure cylinders. Invention can be used also at servicing and subsequent adjusting of steam turbines especially, high-power ones. Invention improves reliability and increases economy of turbine in operation owing to decreasing excess loads on exhaust parts of low-pressure cylinders and support foundation plates of exhaust parts from side of condenser, decreasing friction forces along support surfaces of low-pressure cylinders, deformation of supports, formation of cracks and increasing vibration stability of turboset at different loads and modes of operation. According to proposed method of mounting of steam turbine condenser connected with several exhaust ports of low-pressure cylinders including assembling, preliminary truing, welding of connecting branch pipes and fixing in space by means of calibrated setting strips under springs. After operation of turboset under load, position of condenser in space is corrected to reduce load on support belt of low-pressure cylinders by disconnecting exhaust branch pipes of turbine and condenser, filling condenser with water of designed mass, placing inserts between upper and lower branch pipes of designed mass, placing inserts between upper and lower branch pipes and subsequent connection of branch pipes of turbine and condenser. Disconnected condenser is filled with water whose mass corresponds to designed load ΔG taken from low-pressure cylinder which is determined by value of compression Δh of spring unit under each support of condenser, basing on its rigidity characteristic K. ΔG removed from low-pressure cylinder is =ΣΔh x K. Estimation of loads on support belt of low-pressure cylinders in process of complex tests is carried out by displacement pickups checking compression of spring under all supports of condenser, and grade pickups on built-in supports of low-pressure cylinders operating at continuous monitoring by means of processor-based devices.

EFFECT: improved reliability end economy of turbine.

2 cl, 2 dwg

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