The condenser steam turbine

 

(57) Abstract:

The invention relates to a power system and can be used in the condensers of steam turbines, mainly in capacitors with two connection sockets for the two flow turbines. The capacitor includes a housing with one or two connecting pipes, informing the condenser exhaust part of the turbine. Each nozzle is equipped with lens with expansion joints spaced along the height of the nozzle. The walls of the pipe above the upper compensator and under the lower compensator connected inside rigid in the vertical direction ties, which are made in the form of a hinge mounted on these walls rigid rods or tightly bonded with these flexible walls plates. This design gives the offset of the turbine along its axis relative to the capacitor when thermal expansion and simultaneously unloading of the low pressure cylinder from atmospheric pressure. 2 C.p. f-crystals, 2 Il.

The invention relates to a power system and can be used in the condensers of steam turbines, mainly in capacitors with two connection sockets for double-flow turbines.

Known capacitor proteinsathome, which simultaneously support the exhaust of the turbine, made of sliding, and the other bearing includes a flexible element between the fixed support part and a capacitor (Cm. I. N. Kirsanov. Condensation installation. M., "Energy", 1965, page 104, Fig. 6.6).

This design allows you to accommodate thermal movement of the expansion turbine in the horizontal plane. However, the rigid connection of the capacitor with the turbine, excluding the suctions air in the vacuum system, transmit the load from the weight of the condenser in the turbine housing and support, which leads to the need for a significant strengthening of a body part of the turbine exhaust condenser, increasing the metal and the reinforcement of supports to ensure their move (especially for large condensers and turbines). In addition, this design does not provide compensation of vertical thermal and other movements system turbine - condenser support condenser".

Known condenser steam turbine, which has a compensator lens on the connecting pipe and rod vertical supports on the outside of the capacitor, fixed at the ends of its side walls and racks of Foundation, with support snabzhennoe's certificate of the USSR N 1513363, CL F 28 B 1/02, 1989).

This design allows us to provide movement of the capacitor in the vertical direction, however, leads to an increase of metal due to significant strengthening of the chassis and the support zone of the turbine for the perception of load from atmospheric pressure. In addition, this solution is complicated due to the introduction of a special device to compensate for thermal movement of the rod bearings with hydraulic system for supplying and discharging coolant.

Also known condenser steam turbine installation with rigid connection of the capacitor with the exhaust part of the turbine, which is the purpose of the perception of vertical forces and thermal vertical movement of the turbine together with the capacitor is mounted on a spring support (I. N. Kirsanov. Condensation installation. M., "Energy", 1965, page 159, Fig. 8.18).

This design due to the flexibility of the springs allows to unload the supporting belt exhaust side of the turbine of the weight of the empty capacitor, and the additional load when filling the condenser water is perceived reference zone and partly by springs.

At the same time, thermal expansion of the turbine in the horizontal plane can when the e to cause leakage at the connection point of the turbine to the condenser. While there are negative consequences: the ingress of air through the leaks in the vacuum system, reducing the efficiency and reliability of the turbine as a whole.

The objective is to ensure the compensation of the horizontal temperature movements of the turbine relative to the capacitor when the simultaneous unloading of the low pressure cylinder (LPT) from atmospheric pressure. In the result, accordingly, increases reliability of the steam turbine, without the need to increase the metal, as in the prototype, provided offload module from the atmospheric pressure.

This technical effect is achieved in the condenser of a steam turbine unit installed with possibility of vertical movement, for example, spring supports, containing the condenser casing, at least one connecting pipe, indicating the condenser casing with the exhaust part of the turbine, which according to the invention the connecting pipe provided with a lens capacitors are separated by the height of the pipe wall of the pipe above the upper compensator and under the lower compensator is connected internally with the possibility of relative movement of the walls of the x walls rigid rods or rigidly bonded with these flexible walls plates.

When this connection to improve the reliability of the capacitor is equipped with at least one spacer bars rods located between the walls of the connecting pipe is placed between the lens compensators. In addition swivel rigid rods with the walls of the pipe is placed under the bracket hinge wedge Jack to compress the bracket to the shaft of the hinge from the bottom.

When thermal expansion along the axis of the turbine in the claimed capacitor deformation of the lens compensators to rotate a part of the pipe that is placed between them, which makes it possible to move the turbine relative to the condenser along the axis of the turbine. This ties connecting joints as advertised, transmit load from atmospheric pressure from the exhaust of the turbine to the condenser.

In Fig. 1 - depicts a steam turbine, condenser and piping.

In Fig. 2 - depicts the V Jack.

The capacitor includes a housing 1 mounted on spring supports 2 having two coupling sleeve 3, which capacitor is connected to the exhaust pipe 4 exhaust side of the turbine. The fittings 3 are installed on rasshifrovka 3 is formed in each nozzle 3 system the lens compensators. Inside the nozzles 3 posted by screed 7 in the form of rigid rods connecting the hinge wall 8 above the upper joints 5 with the walls 9 under the lower joints 5. When this pivot bearing-shafts 10 of the hinge through which the rod 7 is fixed to the walls 8, 9 are located in a horizontal plane perpendicular to the axis of the turbine to provide moving relative to each other of the walls 6, 8, 9 nozzle 3 along the axis of the turbine. For a sample of rational gap under the fingers 10 of the lower hinges they have a wedge-shaped Jack 11 under the brackets 12, allowing you to select the specified clearance during installation of the turbine - condenser.

Screed 7 can be made as rigid in the vertical direction of the flexible plates (the latter on features. not shown), each of which is rigidly fixed at the ends on the wall 8 and 9, connecting them. When plates are placed on opposite walls of the pipe, perpendicular to the axis of the turbine so that the plate had the lowest moment of resistance in the direction of this axis.

To increase the rigidity of the connecting pipes 3 in the area of the wall 6 inside the nozzle 3 is posted spacer lattice rods 13, which are located between the walls 6.

During turbine operation thermal elongation of the shell from fixpunkt along the axis of the turbine is greater than the elongation of the body of the capacitor. To compensate for this difference of displacements is proposed device.

When the expansion turbine along an axis relative to the capacitor is offset from the wall 8 of the connecting pipe 3 with respect to the walls 9. Thus at the top of the compensator 5 left side of its lens is compressed, stretched right. At the bottom of the compensator 5 opposite the left part of the lens is stretched, and the right is compressed. As a result, the box formed by the walls 6 of the part of the connecting pipe connected between a rod grating 13, turns, providing the ability to move along the axis of the turbine. For unloading effort from atmospheric pressure to the turbine serve screed 7 hinge bearings-shaft 10 located on the inner surfaces of the walls of the tube connection and transmitting the load from the turbine exhaust to the condenser.

For the perception of these loads since the set of vacuum screed 7 pre-compressed wedge jacks 11, eliminating gaps between the brackets 12, the fingers 10, screed 7.

Gain is the making.

1. The condenser of the steam turbine, installed with possibility of temperature vertical displacement, for example, spring supports, containing the condenser casing, at least one connecting pipe, indicating the condenser casing with the exhaust part of the turbine, characterized in that the connecting pipe is provided with a lens compensators are separated by the height of the pipe wall of the pipe above the upper compensator and under the lower compensator is connected internally with the possibility of relative movement of the walls of the pipe along the axis of the turbine rigid in the vertical direction couplers in the form of a hinge mounted on these walls rigid rods and/or stiffening with these flexible walls plates.

2. The condenser steam turbine under item 1, characterized in that the connecting pipe is provided with at least one spacer bars rods located between the walls of the connecting pipe is placed between the lens compensators.

 

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