Steam turbine

 

(57) Abstract:

Steam turbine is designed to drive the generator or the working machine. End bearing is held through proviruses pipe resting on the base block holder. In a steam turbine installation with a similar steam turbine condenser Rethimno rigidly connected with extras a manually adjustable needle nozzle. The condenser is installed in many of the supports located at the height of the Central axis of the turbine rotor. This installation allows for a particularly high rigidity of the end bearing to have a high stability relative movements proviruses pipe. 3 C.p. f-crystals, 3 ill.

The invention relates to a steam turbine plant with a steam turbine, a turbine rotor which is mounted in end supports.

The steam turbine is typically used in power plant for driving the generator or industrial setting to drive the working machine. For this to steam turbine down pairs that serves as a medium which expands in the steam turbine with the performance of work. After its expansion steam gets usually through proviruses pipe of a steam turbine connected is also radially. Then the condensate is supplied as feed water to the steam generator and after evaporation then enters the steam turbine so that there is a closed steam circuit.

The turbine rotor such steam turbines are usually installed in many axial and/or radial bearings. One of these bearings, indicated as end bearing, is located in the inner space, for example in the inner sleeve proviruses pipe, and serves to lock in profibus.com inlet end of the rotor shaft of the turbine. Thus, the end bearing is usually made in the form of a radial bearing, i.e. in the form of a bearing to receive radial forces.

From German patent application DE 19615011 A1 famous steam turbine, which is formed from a bearing inserts or half-shells face of the bearing housing end bearing of the turbine rotor is directly connected with extras a manually adjustable needle nozzle. For this purpose, the bearing housing end bearing is held centreceske in profibus.com the pipe through radially spaced brackets. The case of the end bearing when it is located inside the spatial region that when the operate is I, however, particularly sensitive relative movements or deformations proviruses pipe, for example, due to changes in load. Moreover, this implementation is achievable is only limited stiffness of the end bearing. The location of the housing end bearing inside the flow of steam requires, in addition, the high costs for oil seal space relative to the spatial domain, streamlined steam.

The basis of the invention therefore have the task to specify a steam turbine installation of the above type, a steam turbine which in particularly high rigidity of the end bearing has high stability relative movements proviruses pipe. In addition, with particularly low costs must be possible bestvina installation condenser installation or at ground level.

This problem is solved according to the invention due to the fact that the end bearing is held through proviruses pipe steam turbine holder supported on the base block, and a capacitor, given in accordance steam turbine connected Rethimno rigidly with extras a manually adjustable needle tube, and a condenser mounted on the plural is m considerations for high stability relative movements proviruses pipe end bearing should be isolated mechanically from him. In addition, for high rigidity of the bearing should be provided for mechanical connection of the end bearing to the Foundation or to the main frame of a steam turbine. This is achievable due to the fact that the end bearing holder is provided, which on its part is based on the base block. At this end, the bearing may be located in the inner sleeve proviruses pipe.

Bestvina installation condenser installation or on level ground when possible while avoiding disadvantageous head loss due to rejection usually included between the steam turbine and the condenser bypass pipeline. For this capacitor is directly connected to the turbine housing. The connection housing of the turbine and condenser for receiving the frictional forces, in particular, with different characteristics chassis expansion turbine and condenser should be hard.

At the location of the poles at the height of the axis of the turbine thermal expansion steam turbine shifts contentsline damage due to thermal expansions, especially to facilitate the shift of the capacitor in the horizontal direction, to install the condenser is preferably provided multi-ball bearing.

Suitable bearing proviruses if the Foundation is through the many located on a side on profibus.com the pipe legs. Feet ought to be located in the side of profibus.com the pipe so that they are because they are installed in the respective bearing perceive caused by turbine rotor torque proviruses pipe. The turbine housing when this is kept Central guide at its front end and at its rear end in the middle of the shaft. Through the use of bearings to install paws steam turbine can be made so that thermal movement transversely to the main axis of the turbine shaft due to thermal expansion, for example when the load changes, do not lead to damage to the steam turbine.

In the case of symmetrical and thus is particularly insensitive to thermal growth of the location of the steam turbine condenser preferably contains a lot of capacitor elements, of which respectively two are opposite each other on profibus.com Patras the core bearing directly on the Foundation achieved a particularly high rigidity of the end bearing is particularly simple means. In addition, end bearing is mechanically isolated from proliposome pipe and thus not sensitive relative movements proviruses pipe. Due to the fastening of the end bearing directly on the Foundation, in addition, the bearing housing can be located within the mine area and, thus, outside the spatial domain, streamlined steam. The cost of the seal end bearing relative to the spatial domain, streamlined steam, are especially small.

Due to the mobile unit condenser or capacitor elements on the Foundation becomes particularly simple manner it is possible to compensate thermal expansions due to changes in load of the steam turbine when the rigid connection of the capacitor with the turbine housing. Thus, espedally installation condenser installation or at ground level is possible also in case of refusal from the bypass pipeline decoupling afford the condenser of a steam turbine.

An example of carrying out the invention is explained in more detail using the drawings.

Fig. 1 is a schematic depiction of a steam turbine in longitudinal section.

Fig. 2 - proviruses Pat

Identical parts are provided in all the drawings the same reference position.

Steam turbine 1 according to Fig. 1 contains proviruses pipe 2, through which expanded in the steam turbine 1 steam is applied not presented in greater detail in Fig. 1, is turned on after the steam turbine 1 capacitor. Proviruses tube 2 is composed of the lower part of the pipe 4 and the upper part of the pipe 6. The lower part of the pipe 4 and the upper part of the socket b are respectively solid and made in the form of welded construction. Steam turbine 1 in the exemplary embodiment is suitable for use as an industrial turbine and is designed for mechanical power from 6 to 8 MW. Alternative steam turbine 1, however, may also be provided for use as a turbine power plant with relatively higher mechanical power.

Inside proviruses pipe 2 is made in the form of a radial bearing end bearing 8 to the turbine rotor 10 of a steam turbine 1. The turbine rotor 10, in addition, has in many other made in the form of radial and/or axial bearing 12 rotatably around its centralist form a housing for the bearing 20 of the end bearing 8. Further details regarding the implementation of the end bearing 8, and the corresponding sealing device also follow from Fig. 1; for visibility, however, they are not explained.

As can be seen from Fig. 1 and, in particular, from Fig. 2, end bearing 8 is held drawn through the lower part of the pipe 4 proviruses nozzle holder 2 24 resting on the base block 22. For this part of the bearing 18 are rigidly connected to the holder 24.

For seal holder 24, as shown in Fig. 2, is located in the internal space 26 located inside proviruses pipe 2 medium ribs 28. The average rib 28 is held in this type of mine through proviruses pipe 2, and the inner space 26 of the middle rib 28 is communicated through the openings 30 with the surrounding atmosphere. Formed from parts of the bearing 16, 18 of the housing end bearing 8 when this is performed inside in the form of an inner sleeve, thickened in comparison with the average edge 28 of the mine area 32, and, thus, outside the spatial domain, streamlined steam. The cost of the seal end bearing 8 relative to the spatial domain, streamlined steam, when e is estwenno as paleobiologic and joined together in the plane of the connector 34 for education proviruses pipe 2. For the purposes of installation and inspection details of the socket 4, 6 respectively provided with hangers 36. On the lower part of the pipe 4 proviruses pipe 2, in addition, there are many legs 38, each of which are not shown in more detail in the sliding bearing. Legs 38 thus located on the side profibus.com the pipe 2 in such a way that they are because they are installed in the respective bearing perceive torque applied by the turbine rotor 10, during operation of the steam turbine 1.

Due to the mounting end of the bearing holder 8 through 24 directly on the base unit 22 is provided particularly high rigidity of the end bearing 8 is particularly simple means. End bearing 8, in addition, mechanically isolated from proliposome pipe 2 and thus is not sensitive to movements proviruses pipe 2 during operation of the steam turbine 1. Installation proviruses pipe 2 in the bearings by means of legs 38 provides besides the compensation torque of the turbine rotor 10. Through the use of bearings to install the legs 38 of the steam turbine 1 is made in such a way the measures when the load changes do not result in damage to the steam turbine 1. In addition, using the legs 38 to a significant extent possible prior to the installation of the steam turbine 1 is already in place.

For installation of the steam turbine 1 and, in particular, its proviruses pipe 2 is provided centered fixation proviruses pipe 2 and the end bearing 8 by means not represented in more detail vertical tail guide.

Steam turbine 1, as schematically shown in Fig. 3, is part of the steam turbine 40. The lower part of the pipe 4 proviruses pipe 2 is located on the support frame 42, which with his hand placed on the land base unit 22 is not represented in more detail the machine hall building.

Steam turbine 1 is not represented in more detail the water / steam circuit of a steam turbine unit 40. In the steam path of the steam turbine 1 is connected to the capacitor 44, which in the exemplary embodiment includes two capacitor element 46, 48. The alternative may also be provided a different number of capacitor elements.

Capacitor elements 46, 48 condence is 1. For the manufacture of rigid detachable connection with each flange 50, 52 is provided with a threaded connection. Proviruses pipe 2 is made in such a way that all provided for the expiration of the exhaust steam of the turbine discharge surface is embedded in the upper part of the pipe 6. Regardless of individual execution of a steam turbine 1 as the lower part of the pipe 4 so you can use the standard item.

For installation of capacitor elements 46, 48 of the capacitor 44 is provided located respectively on the Foundation block 22 block bearing 56 or 58 respectively. On the corresponding block bearing 56, 58 corresponding to the capacitor element 46, 48 is mounted for movement in a horizontal direction through a set of bearings 60 and 62 respectively. Thus, the capacitor 44 is installed with the ability to shift on the Foundation block 22. The bearing blocks 56, 58 according to its height is selected so that the supports 60, 62 are located approximately at the height of the Central axis 14 of the rotor 10 of the steam turbine 1. Due to this arrangement the appearance of the vertical components of the forces in the bearings 60, 62 when thermal suprageneric. Alternative or additional supports 60, 62 can be made in the form of elastomers or swinging supports.

Due to the mobile unit capacitor elements 46, 48 of the capacitor 44 to the base unit 22 is particularly simple manner, it becomes possible location of the capacitor 44 to ground level and thereby bestvina installation of capacitor 44. Appears when the load changes of the steam turbine 1 due to thermal expansion forces are transmitted through the rigid connection to the flanges 50, 52 to capacitor elements 46, 48. They rezultirase there due to a mobile unit in the horizontal offset of the capacitor elements 46, 48 without any noteworthy deformations. When bestvalue installation of capacitor 44, thus, damage due to thermal stresses reliably excluded.

Appears when the horizontal offset of the capacitor elements 46, 48 of the friction force are due to the execution of the bearing elements 50, 52 especially small.

Capacitor elements 46, 48 are located opposite each other on profibus.com the nozzle 2 of the steam turbine 1. Appears when the horizontal offset of the capacitor element of the supports 60, 62 reaction forces practically compensated due to this symmetrical arrangement. The shift of the upper part of the pipe due to thermal expansion thereby reliably excluded.

1. Steam turbine with a steam turbine, a turbine rotor which is mounted in an end bearing, characterized in that to hold the end bearing is provided through proviruses pipe of a steam turbine, based on the base block holder, and proviruses pipe Rethimno rigidly connected with the capacitor installed in many of the supports located at the height of the Central axis of the turbine rotor.

2. Steam turbine under item 1, characterized in that proviruses pipe steam turbine contains many legs respectively mounted in the bearing sleeve.

3. Steam turbine under item 1 or 2, characterized in that the installation of the capacitor provides a multi-ball bearing.

4. Steam turbine according to any one of paragraphs.1 to 3, characterized in that the capacitor contains a number of capacitor elements, of which respectively two are opposite each other on profibus.com the pipe

 

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FIELD: mechanical engineering.

SUBSTANCE: proposed device is designed for alignment of pipe or part inside hollow turbine shaft in turbine in which said pipe or part is rigidly connected by ends with shaft at rotation. It contains bushing rigidly connected with pipe or part and enclosing the latter, elastic ring and means providing expansion of ring after assembling. Elastic ring is installed between bushing and shaft and it contains pairs of shoes made radially outwards. Shoes have thin elastic cylindrical walls whose diameter in nonworking state slightly differs from inner diameter of hollow shaft and which tightly fit inner wall of shaft after assembling.

EFFECT: possibility of reliable holding of pipe inside hollow shaft.

11 cl, 14 dwg

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