WO2014019976A1

WO2014019976A1 - Segment plate valve and steam turbine arrangement

Info

Publication number: WO2014019976A1
Application number: PCT/EP2013/065886
Authority: WO
Inventors: Heinz-Jürgen LATOSCHINSKI
Original assignee: Latoschinski Heinz-Juergen
Priority date: 2012-07-30
Filing date: 2013-07-29
Publication date: 2014-02-06
Also published as: DE102012106954A1

Abstract

The invention relates to a segment plate valve (1) having a valve housing (2), having a fixed disc (8) which is arranged on the valve housing (2) in a rotationally fixed manner, having a loose disc (17) which is mounted rotatably in the valve housing (2), and having an adjusting device (3) which is arranged on the valve housing (2) and is operatively connected to the loose disc (17). The loose disc (17) bears flatly against the fixed disc (8). The loose disc (17) and the fixed disc (8) have throughflow openings (9, 18) which are adapted to one another. The loose disc (17) can be rotated into an open position and a closed position. The throughflow openings (9, 18) of the loose disc (17) and the fixed disc (8) adjoin one another in the open position and form throughflow ducts (19). The throughflow openings (9, 18) of the loose disc (17) and the fixed disc (8) are offset with respect to one another in the closed position. The fixed disc (8) and the loose disc (17) in each case have an axial hole (10, 16). A mounting element is formed on the fixed disc (8). The loose disc (17) is arranged on the mounting element in a rotatably mounted manner. The invention also relates to a steam turbine arrangement having a first steam turbine, having a second steam turbine and a flow duct which is arranged between the first steam turbine and the second steam turbine. The first steam turbine and the second steam turbine have a common rotor. A segment plate valve (1) is arranged in the flow duct. The rotor is arranged in the fixed disc axial hole (10) of the fixed disc (8).

Description

Segment plate valve and steam turbine arrangement

The invention relates to a segment plate valve with a valve housing, with a fixedly arranged on the valve housing fixed disk, with a rotatable in the

Valve housing mounted loose disk and arranged with one on the valve housing and with the loose disk in

Actually connected adjusting device, wherein the

Losscheibe on the fixed disk rests flat, the loose disk and the fixed disk adapted to each other

Have flow openings, wherein the loose disk in a

Open position and a closed position is rotatable, the flow openings of the loose disk and the fixed disk in the open position adjacent to each other and form flow channels and wherein the flow openings of the loose disk and the fixed disk are offset from each other in the closed position.

Segmented plate valves are used for flow control in a variety of different technical systems

used. For flow control, a

Opening cross section of the flow openings of the

Losscheibe and the fixed disk flow channels formed by turning the loose disk using the

Adjustment device to be changed continuously. In the closed position, the flow openings of the

Losscheibe and the flow openings of the fixed disk in each case in an area of the fixed disk or the loose disk to the fixed disk or loose disk on by no Flow openings are arranged. In the closed position, the flow cross section of the segment plate valve is therefore zero. The known segment plate valves allow a particularly accurate flow control and a large

Adjustment.

The known segment plate valves can also be used, for example, for flow control in steam turbines or

Steam turbine assemblies are used. at

Steam turbine arrangements in which several steam turbines are successively flowed through by hot steam and driven in this way, valves are for example for

Removal of hot steam from the flow channel used. For this purpose, the hot steam exiting coaxially around the rotor from a first steam turbine is directed into a flow channel objected to the rotor. To the

Flow channel is arranged a withdrawal line, in the hot steam, for example, via a suitable in the

Flow channel arranged directional control valve can be passed. In this way, hot steam, for example, too

Heating purposes can be used or the turbine performance can be adjusted.

The flow channel opens into a second steam turbine, so that the non-extracted steam flows through the second steam turbine and drives. The required for the removal or flow control multiple diversion of the hot steam from the first steam turbine to the second steam turbine, the hot steam energy is withdrawn, so that the overall efficiency of the steam turbine assembly decreases.

In addition, a desired with respect to the efficiency of the rotor coaxial direction of energization of turbine blades of the second steam turbine is not or only with a considerable Effort possible. As a result, the overall efficiency of the steam turbine arrangement is further reduced or the

Production costs of the plant increased. As an object of the invention, it is considered the known

Segment plate valves to develop so that when used in technical equipment such as

Steam turbine assemblies or the like another

Efficiency improvement and cost reduction is achieved.

This object is achieved in that the fixed disk and the loose disk each having an axial bore, wherein on the fixed disk, a bearing element is formed and wherein the loose disk is rotatably mounted on the bearing element. In this way, the segment plate valve can be arranged for example around a machine shaft, wherein the machine shaft in the

Axial drilling of the fixing of the loose disk is arranged. This opens up a large number of new areas of application for the segmental plate valves.

The diameters of the axial bores of the fixed disk and the loose disk and the sizes of the fixed disk and the

Losscheiben can be easily adapted to the respective requirements. So can the diameter of the

Axial bores, for example, be adapted to a diameter of a machine shaft to be arranged in the axial bores. Depending on the diameter of the axial bores and the size of the fixed disk and the loose disk, the fixed disk and the loose disk have a more or less annular cross-section. Expediently, the axial bores of the loose disk and the fixed disk have a common axis.

The bearing element may be, for example, a plurality of concentrically arranged around the axial bore of the fixed disk on the fixed disk and rotatably mounted on the fixed disk rolling elements which bear against an inner surface of the axial bore of the loose disk, so that the loose disk rotatably mounted on the rolling elements on the fixed disk is arranged.

In a particularly advantageous and inexpensive

producible embodiment of the segmental plate valve is provided according to the invention, that it is in the

Storage element around one at an edge of a

Festscheibenaxialbohrung trained circular

Lagerungswulst acts and that the Lagerungswulst is arranged in a Losscheibenaxialbohrung so that the

Losscheibe rotatably mounted on the Lagerungswulst is arranged. The Lagerungswulst or the fixed disk with the

Lagerungswulst is easy, for example, in one

Casting process from a suitable metal to produce.

Appropriately, the axial bore of the loose disk is used for storage on the bearing element of the fixed disk. For this purpose, for example, along a

Inner surface of the axial bore of the loose washer suitable

Be arranged sliding elements. For storage of the loose disk on the Lagerungswulst or the rolling elements or similar storage elements of

Fixed disk has the axial bore of the loose disk

expediently a larger cross-section than the Axial bore of the fixed disk. The cross section of the axial bore of the loose disk depends on the arrangement, the shape and the size of the bearing element. However, it is also possible and expediently provided that a guide element is arranged on the loose disk, wherein the guide element with the bearing element in

Engaging and the loose disk is rotatably mounted on the bearing element via the guide element.

To further improve the storage of the loose disk on the Lagerungswulst is inventively provided that the

Losscheibe via rollers on the Lagerungswulst is rotatably mounted. In this way, a particularly low-friction and thus easier to control adjustment of the floating disk can be made possible.

And to be able to mount and disassemble the segment plate valves simply, for example, on a machine shaft according to the invention advantageously provided that the

Valve housing, the fixed disk and the floating disk are designed in two parts. For example, it is possible that

Valve housing, the fixed disk and the loose disk along a through the common axis of the axial bores of

Solid disk and the floating disk extending plane two-piece design, the respective sub-elements of the

Valve housing, the fixed disk and the loose disk are designed detachably connectable. In this way, it is possible to mount the segmental plate valve, first a first half of the split segment plate valve

for example, to be arranged on a machine shaft and

then the second half on the machine shaft

to arrange and connect to the first half. to Connection of the sub-elements, for example, suitable screw or the like can be used.

Likewise, it is possible that segment plate valve by releasing the connection of the sub-elements, for example, from one into the axial bore of the fixed disk and the

Disassembling a loose disk arranged machine shaft.

To further simplify the assembly and disassembly of the segmental plate valve, the invention provides that the

Adjustment device is designed in two parts. In this way, for example, a first part of

Adjustment device to be arranged on the valve housing, while one with the first part engaged and for the establishment of the operative connection between the

Adjustment device and the loose disk required second part is arranged on the loose disk. This allows the

Loose disc easily assembled and disassembled. The segment plate valve according to the invention can

advantageously particularly inexpensive thereby

be prepared that the fixed disk is formed as a shape of the valve housing. In this way, the fixed disk and the valve housing together, for example, with a suitable casting of a metal

getting produced.

In a particularly advantageous embodiment of the

Segment plate valve according to the invention is provided that on an inner surface of the Festscheibenaxialbohrung a

Seal element is arranged. In this way, the segment plate valve, for example, against a in the

Axial bores arranged machine shaft are sealed, so that a flow in an air gap between the

Machine shaft and the inner surfaces of the axial bores is avoided. The sealing element is

expediently around a labyrinth seal element.

Particularly good flow characteristics of

Segment plate valve can be achieved in that the flow openings of the fixed disc have an approximately rectangular cross-section. Conveniently, the approximately rectangular flow openings

rounded corners and a ring segment-shaped cross section.

A further improvement of the flow characteristics of the segmental plate valve can advantageously be achieved in that the cross section of the rectangular

Flow openings of the hard disk on a first

Fixed side is larger than the cross section of

rectangular flow openings of the fixed disk on a second side of the fixed disk, so that the cross section of the rectangular flow openings of the fixed disk from the second side of the fixed disk to the first fixed side of the disk increases conically. A particularly good controllability of the resulting flow rate can be achieved in that

Flow openings of the floating disk have an approximately triangular cross section or an approximately trapezoidal cross section. The substantially circular or trapezoidal flow openings expediently also have rounded corners. Advantageously, the loose disk is characterized in the

Fixed disc, that on the housing a spring holder is arranged with a spring, wherein a sliding ring between the spring holder and the loose disk is arranged and bears against the loose disk, wherein the spring against the

Spring holder and the sliding ring is supported, so that the spring exerts a force on the sliding ring on the sliding ring and the loose disk is pressed onto the fixed disk. In this way, also an undesirable flow in the

Closed position can be avoided, since the training of a

Air gap between the loose disk and the fixed disk in the closed position is avoided.

The invention also relates to a steam turbine arrangement with a first steam turbine, with a second steam turbine and between the first steam turbine and the second

Steam turbine arranged flow channel, wherein the first steam turbine and the second steam turbine have a common rotor.

The efficiency of such a steam turbine arrangement can be further improved by arranging a segment-plate valve as described above in the flow channel, wherein the rotor in the

Festscheibenaxialbohrung the fixed disk is arranged. In this way, it is possible to use an axially arranged around the rotor flow channel, wherein the exiting from the first steam turbine hot steam unhindered and without deflection by the flow channel and concentrically arranged around the rotor axis in the floating disk and the fixed disk flow openings in the second Turbine can flow. The turbine performance can be easily adjusted by the flow area of the Flow channels is changed by rotating the loose disk according to the respective requirements.

The efficiency of the steam turbine assembly can be further improved by the fact that the flow openings of the floating disk and the fixed disk axially aligned

Turbine blades of the second steam turbine are arranged. In this way, with respect to the efficiency

Particularly advantageous flow of the turbine blades can be achieved.

In order to seal the segment plate valve and the rotor against each other and to avoid unwanted vapor flow through an air gap between the inner surface of the axial bores and the rotor is provided according to the invention that on the rotor to the inner surface of the axial bore of the

Fixed disc adapted sealing element is arranged.

Conveniently, the sealing element is a labyrinth seal member that abuts a corresponding one on the inside of the solid state axial bore of the

Segment plate valve arranged labyrinth seal element is adapted.

Advantageously, the invention provides that the valve housing of the Segmentplattenventils is connected to a housing of the flow channel. Conveniently, the segment plate valve by means of arranged on the valve housing flanges with corresponding flanges of the

Flow channel or the first or second steam turbine connected.

In the particularly advantageous embodiment of

Steam turbine assembly according to the invention is provided that on the flow channel a removal valve is arranged. In this way, simply hot steam can be removed, for example, for heating purposes from the flow channel. Conveniently, the bleed valve between the first steam turbine and the segment plate valve on the

Flow channel arranged. In this way, the

The amount of steam removed can be controlled in a particularly simple and accurate manner by changing the flow cross-section of the flow passages of the segmental plate valve, in that a back pressure of the steam flow in the direction of flow before the

Segment plate valve is varied.

Further advantageous embodiments of the segment plate valve according to the invention and the invention

Steam turbine arrangement will be explained in more detail with reference to the embodiments illustrated in the drawings.

FIG. 1 shows a schematically represented view of a

Segment plate valve,

FIG. 2 is the one shown schematically in FIG

Segment plate valve from an alternative perspective,

3 shows a schematically illustrated section of an inlet side of the one shown in Figures 1 and 2

Segment plate valve, Figure 4 shows a schematically illustrated section of an outlet side of the one shown in Figures 1-3

Segment plate valve, FIG. 5 shows a schematically represented view of a loose disk,

Figure 6 is a schematic view of a half of a valve housing and a fixed disk.

FIG. 1 shows a schematically represented view of a segmented plate valve 1 designed in two parts, with a valve housing 2 and an adjusting device 3 arranged on the valve housing 2. On the valve housing 2 of the

Segment plate valve 1 connecting flanges 4 are formed. About the connecting flanges 4, the segment plate valve 1, for example, not shown and to the

Flange 4 adapted flanges of a pipeline or the like can be set.

The segment plate valve 1 is formed in two parts. An upper housing half 5 and a lower housing half 6 of the valve housing 2 are connected to one another via screw connections 7.

FIG. 2 shows that shown schematically in FIG

Segment plate valve 1 from an alternative perspective. The segmental plate valve 1 has a fixed disk 8 with several arranged on a circumference of the fixed disk 8

Flow openings 9 on.

The fixed disk 8 has a Festscheibenaxialbohrung 10. In the Festscheibenaxialbohrung 10, for example, a machine shaft or a common rotor of a multi-stage steam turbine or a steam turbine arrangement can be arranged. On an inner surface 11 of the axial bore 10 is a

Seal element 12 is arranged. The sealing element 12 is configured as a labyrinth seal element. The fixed disk 8 is formed as a shape of the valve housing 2. The upper housing half 5 of the valve housing 2 and an upper half of the disk 13 of the fixed disk 8 and the lower housing half 6 of the valve housing 2 and a lower disk half 14 of the fixed disk 8 are each made in one piece and connected to each other via the screw 7.

FIG. 3 schematically shows a detail of an inlet side of the segment plate valve 1 shown in FIGS. 1 and 2.

The fixed disk 8 to be recognized in FIG. 3 from the opposite side as shown in FIG. 2 has a bearing bead 15. Of the

Lagerungswulst 15 engages in a Losscheibenaxialbohrung 16 a loose disk 17, so that the floating disk 17 is rotatably mounted on the Lagerungswulst 15 is arranged. The

Losscheibe 17 has an annular cross-section. The floating disk 17 has a triangular shape

Flow openings 18 with rounded corners. In the position shown in Figure 3 of the rotatably mounted

Losscheibe 17 form the flow openings 18 together with the flow openings 9 of the fixed disk 8 completely open flow channels 19th

The adjusting device 3 is formed in two parts and has a first arranged on the valve housing 2 part 20 and a second arranged on the floating disk 16 part

21, which is in operative connection with the first part 20.

FIG. 4 schematically shows a view of the

Segment plate valve 1 from an outlet side of

Segment plate valve 1 shown off. The

Flow openings 9 of the fixed disk 8 have a

approximately rectangular or ring segment-shaped

Cross-section on.

In Figure 5, a loose disk 17 is shown schematically. The loose disk 17 has on an inner surface 22 of the

Axial bore 16 rollers 23 on. On the rollers 23, the idler pulley 17 rotatable, for example, on a

Lagerungswulst a solid disk are stored.

Figure 6 shows a diagrammatic view of the integrally formed lower half 5 and the lower half of the disc 14 of a valve housing and a fixed disc from an inlet side.

In the figures, for purposes of illustration, only selected elements of otherwise similar elements, such as, for example, the flow openings 9 of the fixed disk 8 are provided with reference numerals.

Claims

PATENT APPLICATIONS

1. Segment plate valve (1) with a valve housing (2), with one on the valve housing (2) rotatably mounted

Fixed disc (8), with a rotatably mounted in the valve housing (2) floating disk (17) and with one on the valve housing (2) and arranged with the floating disk (17) in

Actuator standing adjusting device (3), wherein the loose disk (17) on the fixed disk (8) rests flat, wherein the floating disk (17) and the fixed disk (8) adapted to each other flow openings (9, 18), wherein the floating disk (17) in an open position and a

Closed position is rotatable, wherein the flow openings (9, 18) of the loose disk (17) and the fixed disk (8) adjoin each other in the open position and flow channels (19) form and wherein the flow openings (9, 18) of the

Losscheibe (17) and the fixed disk (8) in the

Closed position are offset from each other, characterized

characterized in that the fixed disc (8) and the loose disc (17) each have an axial bore (10, 16), wherein on the fixed disc (8) a bearing element is formed and wherein the loose disc (17) rotatably mounted on the

Storage element is arranged.

2. Segment plate valve (1) according to claim 1, characterized

characterized in that the bearing element is a circular bearing bead (15) formed on an edge of a disk axial bore (10) and that the bearing bead (15) is in a floating disk axial bore (16) is arranged, so that the loose disk (17) is rotatably mounted on the Lagerungswulst (15).

3. Segment plate valve (1) according to claim 2, characterized

characterized in that the floating disk (17) is rotatably mounted on rollers (23) on the Lagerungswulst (15).

4. Segment plate valve (1) according to one of the preceding claims, characterized in that the valve housing (2), the fixed disk (8) and the loose disk (17) are designed in two parts.

5. segment plate valve (1) according to one of the preceding claims, characterized in that the

Adjustment device (3) is designed in two parts.

6. Segment plate valve (1) according to one of the preceding claims, characterized in that the fixed disc (8) is designed as a shape of the valve housing (2).

7. Segment plate valve (1) according to one of the preceding claims, characterized in that on an inner surface

(11) the Festscheibenaxialbohrung (10) a sealing element

(12) is arranged.

8. segment plate valve (1) according to one of the preceding claims, characterized in that the

Flow openings (9) of the fixed disk (8) a

have approximately rectangular cross-section.

9. Segment plate valve (1) according to claim 8, characterized

characterized in that the cross section of the rectangular

Flow openings (9) of the fixed disk (8) on a first Fixed side is larger than the cross section of

rectangular flow openings (9) of the fixed disk (8) on a second side of the solid disk, so that the cross section of the rectangular flow openings (9) of the fixed disk (8) from the second side of the solid disk to the first

Solid side enlarged conically.

10. segment plate valve (1) according to one of the preceding claims, characterized in that flow openings (16) of the loose disk (17) an approximately

have triangular cross section or an approximately trapezoidal cross section.

11. Segment plate valve (1) according to one of the preceding claims, characterized in that on the valve housing

(2) a spring holder is arranged with a spring, wherein a sliding ring between the spring holder and the loose disk (17) is arranged and against the loose disk (17), wherein the spring is supported against the spring holder and the sliding ring, so that the spring via the slip ring a force on the

Losscheibe (17) exercises and the loose disk is pressed onto the fixed disk.

12. Steam turbine arrangement with a first steam turbine, with a second steam turbine and one between the first

Steam turbine and the second steam turbine arranged

Flow channel, wherein the first steam turbine and the second steam turbine having a common rotor, characterized in that a segment plate valve (1) is arranged according to one of claims 1 to 10 in the flow channel, wherein the rotor in the Festscheibenaxialbohrung (10) of the fixed disk (8 ) is arranged.

13. Steam turbine arrangement according to claim 12, characterized in that the flow openings (16) of the

Losscheibe (17) and the fixed disk (8) are arranged axially aligned with turbine blades of the second steam turbine.

14. Steam turbine arrangement according to one of claims 12 or

13, characterized in that on the rotor a to the inner surface (11) of the Festscheibenaxialbohrung (10) of the

Fixed disc (8) adapted sealing element (12) is arranged.

15. Steam turbine arrangement according to one of claims 12 to

14, characterized in that the valve housing (2) of the segmental plate valve (1) with a housing of the

Flow channel is connected.

16. Steam turbine arrangement according to one of claims 12 to

15, characterized in that a removal valve is arranged on the flow channel.