Steam turbine

 

(57) Abstract:

The invention is intended for converting thermal energy into mechanical energy. The purpose of the invention is the reduction in size and improvement of energy efficiency of steam turbines with mixing condensers. The installation consists of a body with a flowing part, exhaust pipe with condensate, cooling water drain pipe and suction pipe gas mixture, and mixing condenser type. The collectors of the spray coolant mounted directly on the exhaust pipe after the last step of the flow part. And the condensate from the cooling water drain pipe and the suction pipe gas mixture attached to the lower part of the exhaust pipe. This installation will reduce its size and improve its energy efficiency. 1 Il.

The invention relates to the field of power engineering, in particular to steam turbines with capacitors mixing type.

Known steam turbine, comprising a housing, a flow part, exhaust pipe and a condenser located under the outlet pipe (see Slower gg, Milan s.r.o Study and calculation of such structures - most metal capacitor.

Known steam turbine, comprising a housing, a flow part, exhaust pipe and the mixing condenser with manifold spray coolant, condensate and suction pipe gas mixture (see A. M. Kazan, the Condensation device, lecture notes, 1939, S. 34).

Here it is possible to reduce the intensity of the condenser, however, there is another disadvantage: high consumption of cooling water must be pumped at low pressure, which requires large podporou for condensate pumps, grow the vertical dimensions of the device, the pressure loss of the exhaust steam in the transition from the exhaust pipe into the mixing condenser.

The purpose of the invention is reducing the size and improving the energy efficiency of a steam turbine with a mixing condenser steam.

The invention consists in that the collector of spray cooling water is placed directly in the exhaust pipe behind the blades of the last stage of the turbine, which enables reducing the vertical dimensions of size and reduction of the pressure loss of the steam, which condenses naenia and magnitude of the velocity at the inlet of the condenser; cooling water from the condenser is collected in the condensate, attached directly to the lower part of the upper pipe.

The device shown in the drawing. It consists of a casing of the steam turbine 1, the flow part 2, the exhaust pipe 3, is installed on the reservoir spray cooling water 4, and to the bottom of the exhaust pipe attached to the condensate 5 pipe condensate drain 6 and the suction pipe gas mixture 7.

The device operates as follows. The steam expands in a sturdy part 2, housed in the turbine housing 1, producing useful work. Exhaust steam leaves the last stage of the flow part 2 to the outlet 3 and meets the sprayed cooling fluid which is flowing from the collector nozzle 4. As the water vapor velocity decreases and pressure increases (the effect of the heat diffuser). The cooling water is heated by condensing steam and collected in the condensate 5 attached to the lower part of the outlet pipe and the pipe 6 is given to the pump. Non-condensable gases are exhausted vozduhoudalenija device out of the socket 7.

Thanks to the implementation of the above constructive is it to pair, thereby sharply reduced vertical dimensions of the steam turbine and increases its cost-effectiveness.

Steam turbine, consisting of a body, hydraulics, exhaust pipe with condensate, cooling water drain pipe and suction pipe gas mixture, mixing condenser type, characterized in that the collectors of the spray coolant mounted directly on the exhaust pipe after the last step of the flow part, and the condensate from the cooling water drain pipe and the suction pipe gas mixture attached to the lower part of the exhaust pipe.

 

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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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EFFECT: the invention allows use kinetic energy of boiling water for fulfillment of mechanical work.

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