WO2010091940A1

WO2010091940A1 - Valve connection to a three-shelled turbo machine

Info

Publication number: WO2010091940A1
Application number: PCT/EP2010/050798
Authority: WO
Inventors: Erhard Kommel; Christoph Kästner
Original assignee: Siemens Aktiengesellschaft
Priority date: 2009-02-10
Filing date: 2010-01-25
Publication date: 2010-08-19
Also published as: EP2216513A1; EP2396516B1; CN102317581A; EP2396516A1

Abstract

The invention relates to a turbo machine having a valve, wherein the turbo machine comprises an outer housing (1), an outer inner housing (2), and an inner inner housing (3) and is thus comprised of a three-shelled design, wherein a valve diffuser (4) is coupled to the turbo machine via two angle connections (8, 9).

Description

description

Valve connection to a three-shell flow machine

The invention relates to a turbomachine with a Ven ^¬ til, wherein the turbomachine comprises an inner inner housing, an outer and an inner housing Außengehause, wherein the valve comprises a valve diffuser and a valve housing wherein the valve housing is connected via a valve flange with the Außengehause, wherein the inner Innengehause is connected via a first Winkelrmgverbmdung with the valve diffuser.

Two-shell steam turbines are known. In a twin-bladed steam turbine, the inner housing is arranged around the rotor and the outer housing around the inner housing. As a result of temperature changes, it may cause movements of the Innengehauses relative to the valve. The valve essentially comprises a valve housing and a valve fittor arranged in the valve. The valve diffuser is usually designed for guiding the flow medium. When the valve diffuser and the inner housing was rigidly coupled by means of kraftschlussiger compounds having ^¬ each other, this was to tensions and possibly lead to deformations that are undesirable. Therefore, so-called. Angular ring connections are used. The valve diffuser and the inner housing each have a groove in which an angle ring is arranged. This leads to the fact that a warming movement in both an axial and in a radial direction can be compensated.

In the case of three-shell steam turbines, an additional interior housing is now added between the inner inner housing and the outer housing, which can be referred to as an outer interior housing. The outer Innengehause also leads as a result of thermal changes from a warming movement, which may possibly interfere with the valve diffuser. Another requirement is that the space between the inner Innengehause and the outer Innengehause and the outer Innengehause and the outer housing should be sealed. Nevertheless, mechanical stresses due to warm movements should be avoided.

It would be desirable to have a structurally simple way to be able to connect the outer inner housing to the valve diffuser.

It is an object of the invention to offer a simple way ^{¬ to} couple the outer inner housing to the valve diffuser.

This object is solved by a flow machine according to claim 1.

Thus, with the invention, the way is taken to use a Wm- kelπngverbmdung to couple the outer inner housing to the valve diffuser. With the Winkelrmgverbmdung it is possible to compensate for warm movements both in the direction in which the valve diffuser is elongated, as well as perpendicular thereto. Advantageous developments are specified in the dependent claims.

In a first advantageous refinement, the inner inner housing has a first angle ring arranged in a Innengehausewmkelrmgnut. The Innengehausewmkelrmgnut and the first angle ring arranged therein are made such that a movement of the first angle ring in the nengehausewmkelrmgnut is possible. In addition, the movement should not be restricted as a result of tempera ^¬ turan requirements. For this, the material of the first angle ring and the inner Innengehauses should be chosen appropriately. On the other hand, the tolerances and materials must be selected such that high temperature and high pressure steam can not flow between the first angle ring and the inner housing wiper groove. In a further advantageous development, the second angle ring connection comprises a second angle ring which is arranged in a second valve diffuser formed in the valve diffuser. The second angle ring and the second valve diffuser angle are also formed of materials that allow for a warming motion without causing the seal to relax. The tolerances and materials must be selected accordingly.

The outer housing is in this case arranged around the outer inner housing ^¬ . In addition, the outer Innengehause is arranged around the inner Innengehause.

In an advantageous development, the valve diffuser is designed for the flow of flow medium in a flow direction, wherein the internal housing angle is formed substantially parallel to the flow direction. In this case, the flow medium can be, for example, a vapor, in particular water vapor with high temperatures and high pressures. Since the valve diffuser is substantially elongated and resembles a tube in its appearance, the thermal expansion is to be expected substantially in the long training. Therefore, a seal is desirable ^¬ worth, which is movable in the flow direction. According to the invention, the internal housing angularity is formed parallel to the direction of flow in order to ensure a good warming movement in the direction of flow.

In an advantageous development, the second valve diffuser angle is substantially perpendicular to the flow direction. In the thermal expansion of the outer Innengehauses is essentially a movement perpendicular to the flow direction at the Beruhrungsstelle between the valve diffuser and the outer Innengehause expected. A good warm moving angle ring assembly at this

Job would be desirable. By the second valve diffuser arranged substantially perpendicular to the direction of flow. Sorwinkelringnut is a good Warmebeweglichkeit perpendicular to the direction of flow ensured.

In a further advantageous embodiment of an intermediate ring is arranged on the outer kraftschlussig inner housing, wherein the intermediate ring is formed on a second intermediate ring groove to accept the second angle ^¬ ring. The intermediate ring is an additional component which is frictionally arranged, for example via stud bolts with capsule nuts on the outer inner housing. However, by choosing the material and the selected manufacturing tolerances, an optimum, constructive solution can be offered to compensate for the warm movements of the valve diffuser and the inner interior. In a further advantageous development, the intermediate ring has a first intermediate annular groove for receiving the first angular ring.

In a further advantageous development, the first angle-ring connection has a first and a second angle leg, wherein the first angle-ring leg is arranged in the inner-housing angle and the second angle-ring leg is arranged in a first valve diffuser groove or intermediate annular groove arranged in the valve diffuser or in the angle ring.

In a further advantageous development, the first intermediate ring groove and the second intermediate ring groove are arranged substantially perpendicular to one another. This ensures a very good mobility both in the direction of flow and perpendicular to the direction of flow.

Exemplary embodiments of the invention will be described in more detail below with reference to the drawings. These are not intended to represent the exemplary embodiment to scale, but is shown what explanations serve in a schematic and / or slightly offset form. With regard to additions to the teachings directly recognizable from the drawing, reference is made to the relevant prior art. In the different figures, the same parts are always provided with the same reference numerals, so that these are usually described only once.

Show it

FIG. 1 shows a cross-sectional view of a part of a three-leaf flow machine;

FIG. 2 shows a cross-sectional view of a part of a three-leaf flow machine in an alternative embodiment;

3 shows a cross section of a part of a three-shell steam turbine in an alternative embodiment.

FIG. 1, seen in cross-section, shows part of a three-shell flow machine. The flow machine may for example be a steam turbine. The steam turbine comprises an outer housing 1, an outer inner housing 2 and an inner inner housing 3. For clarity, no rotor is shown. The rotor is rotatably mounted about a rotation axis perpendicular to the plane of the drawing. The inner Innengehause 3 is arranged around the rotor. The outer Innengehause 2 is arranged substantially around the inner Innengehause 3. To the outer Innengehause 2 and the inner Innengehause 3 finally the outer housing is arranged.

In operation, steam flows in a valve diffuser 4 in a flow direction 5 into a flow region 6 of the steam turbine. The steam is flowed into the inflow area 6 via a valve, which is not shown in any more detail. The valve substantially comprises the valve diffuser 4 and a valve housing 7. The inner inner housing 3 comprises a first annular collar connection 8, which makes it possible to warmly couple the inner inner housing 3 to the valve diffuser 4. The first Angle ring connection 8 serves the purpose of enabling an effective seal between the inflow region 6 and the sealing space 10, which is arranged between the inner inner housing 3 and the outer Innenge- home 2. The second angle connection 9 is also designed to allow an effective seal between the inflow region 6 and the second sealing space 11 which is arranged between the outer inner housing 2 and the outer housing 1.

In operation, warm movements of the inner Innengehauses 3 can take place in the flow direction 12 and perpendicular to the flow direction 13. The outer Innengehause 2 can also exercise warming movements in the flow direction 12 and perpendicular to the flow direction 13. To compensate for these warm movements, serve the first angle ring connection 8 and the second angle ring connection 9. The first Winkelringverbmdung 8 comprises a first angle ring 14 and a Innengehausewinkelringnut 15 arranged in the inner Innengehause 3 on. Furthermore, the first angle ring connection 8 comprises an intermediate ring groove 17 arranged in an intermediate ring 16. The intermediate annular groove 17 is produced by a ring component 18. For this purpose, the ring component 18 is designed such that on the one hand to the intermediate ring 16 frictionally ver ^¬ bound and on the other hand, an intermediate annular groove 17 is formed, in which the first angle ring 14 is arranged. The frictional connection between the ring component and the intermediate ring 16 is realized by a thread 32.

The first angle ring 14 comprises a first angle ring leg 19 and a second angle ring leg 20. The first angle ring leg 19 and the second angle ring leg 20 are substantially perpendicular to each other.

The second Winkelringverbmdung 9 essentially comprises a second angle ring 21. The second angle ring 21 comprises a first angle ring leg 22 and a second angle ring leg 23. The first angle ring leg 22 and the second angle ring leg 23 are substantially perpendicular to each other. The first angle ring leg 22 is arranged in a corresponding second intermediate ring groove 24. The second angle ring leg 23 is arranged in a corresponding valve diffuser groove 25. The valve diffuser groove 25 in the valve diffuser 4 is realized by means of a ring component 26. The further ring component 26 is coupled in a non-positive manner by means of a thread 33 to the valve diffuser 4 and is designed such that the valve diffuser groove 25 is formed.

The intermediate ring 16 is connected via stud bolts 27 with capsule nuts to the outer Innengehause 2.

FIG. 2 shows an alternative embodiment of the three-shell steam turbine with valve. The essential difference in comparison to the embodiment according to FIG. 1 is that the intermediate ring 16 is omitted and the valve diffuser 4 is lengthened accordingly, so that a further valve diffuser groove 28 is now formed in the valve diffuser 4 and is suitable for receiving the first angular ring 14. The second angle ring 21 is disposed directly with the outer Innengehause 2 in an outer Innengehausenut 29.

FIG. 3 shows a further alternative embodiment of the three-shell steam turbine. The difference between the embodiment according to FIG. 3 and the embodiment according to FIG. 2 is that the second angle ring 21 is not arranged directly with the outer inner housing 2 in an outer inner housing groove 29, but that an insert 30 is provided which is frictionally engaged with the outer one Inner housing 2 is ver ^¬ connected and has an insertion groove 31 for receiving the second angle ring 21.

Claims

claims

1. A flow machine with a valve, wherein the flow machine comprises an inner inner housing (3), an outer inner housing (2) and an outer housing (1), wherein the valve comprises a valve diffuser (4) and a Ventilge- home (7) in which the valve housing (7) is connected to the outer housing (1) via a valve flange, the inner inner housing (3) being connected to the valve diffuser (4) via a first connecting ring (8), the outer inner housing (2 ) is connected via a second Wmkel- πngverbmdung (9) with the valve diffuser (4), wherein the second Winkelrmgverbmdung (9) has a second

Angular ring (21) comprising a first angle ring leg (22) and a second

Having angular ring leg (23), characterized in that the second angle ring leg (23) in a corresponding

Is arranged Ventildiffusornut (25), wherein a ring component (26) is provided which is formed such that the Ventildiffusornut (25) is formed between the ring member (26) and the Ventildiffu ^¬ sor (4).

2. A flow machine according to claim 1, wherein the inner inner housing (3) has a in a Innenge- hausewinkelπngnut (15) arranged first angle ring (14).

3. Flowing machine according to claim 1 or 2, wherein the second Winkelπngverbindung (9) comprises a second angle ring (21) which is arranged in a valve in the diffuser (4) Ventilildiffusornut (25).

4. Flowing machine according to one of the preceding claims, wherein the outer housing (1) around the outer inner housing (2) is arranged.

5. Flowing machine according to claim 4, wherein the outer inner housing (2) around the inner inner housing (3) is arranged.

6. Flowing machine according to one of the preceding claims, wherein the valve diffuser (4) for flowing Stromungsme- dium in a flow direction (5) is formed and the Innengehausewinkelπngnut (15) is formed substantially parallel to the flow direction (5).

7. flow machine according to one of the preceding claims, wherein the valve diffuser groove (25) is formed substantially perpendicular to the flow direction (5).

8. Flowing machine according to one of the preceding claims, wherein an intermediate ring (16) on the outer inner housing (2) is arranged kraftschlussig and a second Zwischenringnut (24) for receiving the second angular ring (21).

9. A flow machine according to claim 8, wherein the intermediate ring (16) has a first Zwischenringnut (17) for receiving the first angular ring (14).

10. Flowing machine according to one of the preceding claims, wherein the first angle ring (14) has a first and a second angle ring leg (19, 20), wherein the first angle ring leg (19) in the Innengehausewmkel- πngnut (15) and the second angle ring leg (20 ) is arranged in the intermediate ring groove.