Axially adjustable insertion ring in packing ring and use method for the same

Abstract

To provide an axially adjustable insertion ring in a packing ring and a use method for the same.SOLUTION: A turbine assembly includes a turbine static component including an inner ring and a packing segment positioned relatively to the inner ring so that a steam joint is defined therebetween. The packing segment defines: a groove opened on the steam joint; a first seal surface defined within the groove and located on a side opposite to a portion opened on the steam joint; and a second seal surface defined within the groove and located adjacent to the first seal surface. An insertion ring includes a body including: a first surface; a second surface located adjacent to the first surface; and a third surface opposing to the first surface. The first surface is disposed in proximity to the first seal surface of the packing segment. The second surface is disposed in proximity to the second seal surface of the packing segment. The third surface is disposed in proximity to the inner ring.SELECTED DRAWING: Figure 9

Description

[Background technology]

[0001] The present disclosure relates generally to insert rings used in rotary machines, and more particularly to a method for axially adjusting such insert rings within a packing ring.

[0002] Rotary machines, such as steam and gas turbines used in power generation and mechanical drive applications, are large machines that typically contain multiple turbine stages. High-pressure fluid flowing through these stages must pass through a series of adjacent stationary and rotating components. Seals are used between the stationary and rotating components to control fluid leakage.

[0003] Stationary and rotating components, such as packing rings, may require refurbishment and / or replacement over time to ensure the associated rotating machinery continues to operate efficiently. Refurbishment can include, but is not limited to, repairs to the packing ring seal face, commonly referred to as the "steam face" or "seal face," located between the packing ring and the inner ring axially downstream interface. Currently, parts requiring refurbishment are often removed from service for analysis and / or repair, as necessary. However, removing parts from service is time-consuming and expensive, and in the power generation industry in particular, downtime can result in further penalties, such as the need to purchase replacement power.

[0004] Therefore, there is a need for an efficient method for refurbishing components used in rotary machines, which method effectively limits the downtime of the rotary machines. Summary of the Invention

[0005] In one aspect, an insert ring for a turbine assembly includes an inner ring and a packing segment positioned relative to the inner ring to define a steam joint between the inner ring and the packing segment, the insert ring including a first face positioned adjacent to the inner ring and a second face positioned proximate to the packing segment, the second face positioned opposite the first face and spaced apart from the first face, the insert ring having an axial width defined by the first face and the second face.

[0006] In another aspect, a turbine assembly is provided that includes an inner ring and a packing segment positioned relative to the inner ring such that a steam joint is defined therebetween. The packing segment defines a groove that opens to the steam joint, and the packing segment defines a first seal surface in the groove opposite the portion that opens to the steam joint and a second seal surface in the groove adjacent to the first seal surface. The insert ring includes a body having a first face, a second face adjacent to the first face, and a third face opposite the first face. The first face is positioned adjacent to the first seal surface of the packing segment, the second face is positioned adjacent to the second seal surface of the packing segment, and the third face is positioned adjacent to the inner ring.

[0007] In yet another aspect, a method for selectively positioning an insert ring relative to a turbine assembly is provided, the method including an inner ring and a packing segment positioned relative to the inner ring, the inner ring and the packing segment defining a steam joint therebetween. The method includes identifying a seal location required at the packing seal location and identifying an axial width defined between a first seal surface of the packing segment and a radially inner surface of the inner ring. The method includes selecting an insert ring having an axial width approximately equal to the identified axial width between the first seal surface of the packing segment and the radially inner surface of the inner ring. The method includes at least partially inserting the insert ring into a groove defined circumferentially in the packing segment. The method includes securing the insert ring in the groove of the packing segment to improve operating efficiency of the turbine assembly. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a prior art cross-sectional view of a portion of a steam turbine assembly. [Figure 2] 1 is a cross-sectional view of a portion of an exemplary steam turbine assembly including two insert rings and a radial spring. [Figure 3] 3 is an enlarged cross-sectional view of the steam turbine assembly in detail 1 shown in FIG. 2. [Figure 4] 3 is an enlarged cross-sectional view of the packing ring of the steam turbine assembly shown in FIG. 2 along with a first of the insert rings. [Figure 5] 3 is an enlarged cross-sectional view of a packing ring of the steam turbine assembly shown in FIG. 2, including a second of the insert rings. [Figure 6] FIG. 3 is an enlarged cross-sectional view of an exemplary insert ring that may be used with the steam turbine assembly shown in FIG. 2. [Figure 7] 1 is a cross-sectional view of an exemplary steam turbine assembly including an insertion pin. [Figure 8]3 is a top schematic view of the front half of an exemplary steam turbine assembly including multiple insert rings shown in FIG. 2 and taken along line AA. [Figure 9] 8 is a flowchart illustrating an example method that may be implemented to identify and insert an insert ring and / or pin into a steam turbine assembly such as that shown in FIGS. 3 and 7. [Figure 10] 3 is a cross-sectional view of a portion of the example steam turbine assembly shown in FIG. 2, including two insert rings and a leaf spring. [Figure 11] FIG. 11 is an explanatory side view of the leaf spring shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiments described herein relate to systems and methods that enable axial adjustment of insert rings / pins used in rotary machines. At least some of the advantages of the systems described herein over the prior art include at least the following: (i) selective adjustment of the axial position of the insert rings / pins, (ii) incremental adjustment of the insert rings / pins to facilitate repairs, (iii) reduced rotary machine downtime, and (iv) reduced analysis required to select the appropriate insert ring / pin based on a determined axial width between rotary machine components.

[0010] When introducing elements of various embodiments disclosed herein, the articles "a," "an," "the," and "said" mean that there are one or more of the elements. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements other than the listed elements.

[0011] Unless otherwise indicated, approximate terms such as "generally," "substantially," and "about" used herein indicate that the terms may apply only to an approximate degree that would be recognized by a person of ordinary skill in the art, rather than to an absolute or perfect degree. Thus, values ​​modified by terms such as "about," "approximately," and "substantially" are not limited to the exact value specified. In at least some cases, approximate terms may correspond to the precision of the instrument measuring the value. Furthermore, unless otherwise specified, terms such as "first," "second," and the like are used herein merely as labels and are not intended to impose any requirements regarding order, position, or hierarchy on the items to which they refer. Furthermore, a reference to a "second" item does not require or exclude the presence of a "first" or lower-numbered item, or a "third" or higher-numbered item.

[0012] As used herein, spatially relative terms such as "beneath," "below," "lower," "above," "upper," "front," "back," "side," "left," "right," "rear," "top," and "bottom" are used for ease of description and to describe the relationship of one element or feature to another. It is understood that the terms "front," "back," "left," and "right" are not intended to be limiting and are interchangeable where appropriate. Furthermore, the use of "first," "second," and similar terms herein do not denote any order, quantity, or relative importance, but rather are used to distinguish one element from another.

[0013] All methods described herein can be performed in any suitable order unless otherwise indicated herein or clearly contradicted by context. The use of any examples or exemplary language (e.g., "for example") is intended merely to better illustrate the invention and does not pose a limitation on the scope of the invention or any embodiment unless otherwise stated.

[0014] FIG. 1 is a cross-sectional schematic diagram of a prior art steam turbine assembly 10′. The steam turbine assembly 10′ includes a casing 12′ and a diaphragm outer ring 14′ disposed relative to the casing 12′. The steam turbine assembly 10′ includes a nozzle 15′ and an inner ring 16′ disposed proximate to the diaphragm outer ring 14′. The steam turbine assembly 10′ includes turbine stationary components including a packing ring 19′ disposed proximate to the inner ring 16′. The packing ring 19′ extends outwardly and defines one or more protrusions 21′ that extend toward opposing protrusions 25′ of a rotor 23′.

[0015] [ FIG. 2 is a cross-sectional schematic diagram of an exemplary steam turbine assembly 10. In the exemplary embodiment, assembly 10 includes a casing 12 and a turbine stationary component 14 disposed relative to casing 12. Turbine stationary component 14 may include, but is not limited to, a diaphragm outer ring, a packing head, a packing ring, a packing carrier, an oil deflector, and / or variations thereof. Steam turbine assembly 10 includes a nozzle 15 and an inner ring 16 disposed proximate to diaphragm outer ring 14. More specifically, nozzle 15 is located between diaphragm outer ring 14 and inner ring 16. Steam turbine assembly 10 includes turbine stationary component 14, further including a packing ring 19 disposed proximate to inner ring 16. Packing ring 19 is sometimes referred to as a packing segment 19. In some embodiments, the packing ring 19 may be directly coupled to the casing 12 or the turbine stationary component 12. The inner ring defines a channel 30 extending away from the packing ring 19. The channel 30 may extend a distance relative to the inner ring 16. For example, the distance of the channel 30 may be equal to or less than the circumferential distance of the inner ring 16. The channel 30 may be sized and shaped to at least partially receive a biasing member 32, such as a radial spring, a coil spring, or a leaf spring. As shown in FIGS. 2 and 3 , the radial spring 32 may be in direct or indirect contact with the packing ring 19. For example, the radial spring 32 may be in direct or indirect contact with a first surface 34 of the packing ring 19 such that the radial spring 32 contacts the inner ring 16 and the packing ring 19. The radial spring 32 is partially disposed within a recess 35 relative to the first surface 34 of the packing ring 19.In some cases, more than one radial spring 32 may be used. Although the biasing member 32 is depicted as a radial spring, it should be understood that any biasing member 32 may be used unless otherwise specified.

[0016] In a non-limiting example, the biasing member 32 may be a leaf spring, as depicted in FIGS. 10 and 11 . The leaf spring 32 may be in direct or indirect contact with the packing ring 19. For example, the leaf spring 32 may be in direct or indirect contact with the first surface 34 of the packing ring 19, such that the radial spring 32 contacts the inner ring 16 and the packing ring 19. The leaf spring 32 is partially disposed within a recess 35 relative to the first surface 34 of the packing ring 19. The leaf spring 32 includes a curved feature 33. The curved feature 33 is sized and shaped to at least partially fit within the recess 35 of the packing ring 19. At least the curved feature 33 of the leaf spring 32 rebounds against the inner diameter of the recess 35, applying a radially inward force to the packing ring 19. In some cases, more than one leaf spring 32 may be used.

[0017] The packing ring 19 includes a base segment 36 coupled to a neck segment 38, which is coupled to a hook base segment 40. The hook base segment 40 defines a first surface 34 positioned relative to the channel 30 of the inner spring 16. While the packing ring 19 is described with reference to multiple segments, it should be understood that the packing ring 19 may be a single component, as shown, for example. The packing ring 19 includes a protrusion 21 extending outward from the base segment 36 and away from the first surface 34. The protrusion correlates with the protrusion 21′ depicted in Prior Art FIG. 1. While a steam turbine assembly 10 is illustrated, it should be understood that the following description may also apply to other turbine assemblies, including gas turbine assemblies.

[0018] 3 is a cross-sectional schematic diagram of steam turbine assembly 10, including an enlarged view showing the relationship between inner ring 16 and packing ring 19. In the exemplary embodiment, inner ring 16 and packing ring 19 define a steam joint 17 that is in the steam flow path and therefore exposed to steam pressure. Steam joint 17 may also be referred to as a downstream joint based on the direction of steam pressure. Steam joint 17 is defined by a surface 18 of inner ring 16 and a steam face 20 of packing ring 19 opposite inner ring surface 18. Steam face 20 is the axial interface between packing ring 19 and inner ring 16 that opposes the axial pressure induced in nozzle 15.

[0019] The axial width W1 of the steam joint 17 can vary based on a variety of factors, including, but not limited to, the size of the steam turbine assembly 10, the "dishing" of the packing ring 19, and combinations thereof. The term "dishing" is used to describe creep deformation that may form in the web portion (not shown) of the packing ring 19. In some cases, the axial width W1 may range from about 0 inches "In" to about 0.25 inches.

[0020] In another exemplary embodiment, inner ring 16 and packing ring 19 define a joint 42 located upstream of steam joint 17 based on the direction of steam pressure. This joint 42 is defined by a surface 44 of inner ring 16 and a surface 46 of packing ring 19 opposite inner ring surface 44. Packing ring surface 46 is the axial interface between packing ring 19 and inner ring 16 that opposes the axial pressure induced in nozzle 15.

[0021] The axial width W4 of the joint 42 may vary based on various factors, including, but not limited to, the size of the steam turbine assembly 10, the “dishing” process of the packing ring 19, and combinations thereof. In some cases, the axial width W4 may range from about 0 inches “In” to about 0.25 inches.

[0022] Although axial width W1 is illustrated as being less than axial width W4, it should be understood that the difference between axial widths W1 and W4 is not intended to be limiting. Thus, axial width W1 may be greater than, equal to, or less than axial width W4. Similarly, axial width W4 may be greater than, equal to, or less than axial width W1.

[0023] In some embodiments, packing ring 19 includes a first groove 22 defined therein that is formed relative to inner ring 16. First groove 22 opens to steam joint 17, as best shown in FIG. 4 . Packing ring 19 includes a first sealing face 24 defined opposite steam joint 17. Packing ring 19 defines a second sealing face 26 adjacent first sealing face 24. Packing ring 19 also includes a third face 28 defined opposite second sealing face 26. First sealing face 24, second sealing face 26, and third face 28 at least partially define first groove 22.

[0024] The first groove 22 has an axial width W2 measured between the steam face 20 of the packing ring 19 and the first seal face 24 opposite the packing ring, as best shown in FIG. 4. In some instances, the axial width W2 is between about 0.25 inches and about 0.50 inches. The first groove 22 has an axial width W3 measured between the inner ring surface 18 and the first seal face 24 of the packing ring 19. In some instances, the radial axial width W3 may be between about 0.25 inches and about 0.50 inches.

[0025] In some embodiments, the packing ring 19 includes a second groove 29 defined therein, formed relative to the inner ring 16. It should be understood that the terms first and second merely distinguish between the two grooves 22, 29 for clarity of description. The labeling of first and second in no way requires that one groove be part of a system without the other. The second groove 29 opens to a joint 42. The packing ring 19 includes a first sealing face 31 defined opposite the joint 42. The packing ring 19 defines a second sealing face 33 adjacent the first sealing face 31, as best shown in FIG. 5 . The packing ring 19 also includes a third sealing face 35 defined opposite the second sealing face 33. The first sealing face 31, the second sealing face 33, and the third sealing face 35 at least partially define the second groove 29.

[0026] The second groove 29 has an axial width W5 measured between the inner ring surface 46 of the packing ring 19 and the first seal surface 31 opposite the packing ring 19, as best shown in FIG. 5. In some instances, the axial width W5 is between about 0.25 inches and about 0.50 inches. The second groove 29 has an axial width W6 measured between the inner ring surface 46 and the first seal surface 31 of the packing ring 19. In some instances, the radial axial width W6 may be between about 0.25 inches and about 0.50 inches.

[0027] It should be understood that the first groove 22 and the second groove 29 may define axial widths W2 and W5, respectively, which may be equal to or different from one another. Similarly, the axial widths W3 and W6 may be equal to or different from one another. In some embodiments, the packing ring 19 may include both the first groove 22 and the second groove 29. In other embodiments, the packing ring 19 may include either the first groove 22 or the second groove 29.

[0028] In some cases, the first groove 22 and / or the second groove 29 may be formed during a refurbishment to correct downstream deviation (dishing) at the axial packing seal location of the packing ring 19. In other examples, the first groove 22 and / or the second groove 29 may be formed before or after a refurbishment, such as when the steam turbine assembly 10 is initially manufactured.

[0029] In an exemplary embodiment, the steam turbine assembly 10 includes an insert ring 52 sized and shaped to be at least partially inserted, directly or indirectly, into the first and second grooves 22, 29. The insert rings 52 are standard sizes, and the insert rings 52 are manufactured in various incremental sizes that can be combined to increase the overall size. Similarly, removing portions of the insert ring 52 can also reduce the overall size. The term “size” is not limited to diameter and includes, but is not limited to, thickness, width, and / or combinations thereof. Size may be measured relative to the insert ring 52 and / or may be based on a radial dimension from an axis (e.g., the longitudinal axis). In some embodiments, the first insert ring 52A is sized and shaped to be at least partially inserted, directly or indirectly, into the first groove 22. The second insert ring 52B is sized and shaped to be at least partially inserted, directly or indirectly, into the second groove 29. The first insert ring 52A and the second insert ring 52B may be collectively referred to as 52, and distinguishing between the two insert rings 52 allows for a more detailed description of the steam turbine assembly 10, but does not inherently imply any distinction between the insert rings 52 unless expressly stated otherwise.

[0030] Referring to FIG. 6, the insert ring 52 has an axial width W a The insert ring 52 has a body 54 having an axial width W a The desired axial width W of the body 54 of the insert ring 52 varies depending on the application and may be in graduated sizes. acan be selected prior to installation within the first groove 22 and / or the second groove 29. The body 54 of the insert ring 52 includes a first sealing surface 60 and a second sealing surface 62. The first sealing surface 60 and the second sealing surface 62 are adjacent to one another. In some embodiments, the second sealing surface 62 may be the second surface 62. The body 54 includes a third surface 64 opposite the second sealing surface 62. In some embodiments, the third surface 64 may be the third sealing surface 64. The body 54 may include angled features 66 defined at one or more corners 67 relative to the first sealing surface 60, the second sealing surface 62, and / or the third surface 64. Additional modifications to the insert ring 52 beyond those shown in FIG. 6 are anticipated, including, for example, through holes ( FIG. 4 ) along the longitudinal axis.

[0031] 3 and 4, the first insert ring 52A may be sized and shaped to be at least partially inserted into the groove 22 of the packing ring 19. The distance D1 between the second sealing surface 26 and the third surface 28 of the first groove 22 may be equal to or greater than a distance D2 measured between the second sealing surface 62 and the third surface 64 of the first insert ring 52A (see, for example, FIG. 6). The distance D2 between the second sealing surface 62 and the third surface 64 of the insert ring 52 may be approximately the same as or less than the distance D1 between the second sealing surface 26 and the third surface 28 of the first groove 22. The first insert ring 52A has an axial width W that is approximately the same as an axial width W3 measured between the inner ring surface 18 and the first sealing surface 24 of the packing ring 19. a (See, for example, FIG. 6). In some embodiments, the first insert ring 52A may have an axial width W a is approximately the same as the axial width W3.

[0032] Axial width W of first insert ring 52A amay vary based, in part, on the axial width W1 of the steam joint 17. When installed, the first insert ring 52A at least partially contacts the first sealing surface 24 of the first groove 22 such that a seal is formed between the first sealing surface 24 of the first groove 22 and the first sealing surface 60 of the first insert ring 52A. The first insert ring 52A also at least partially contacts the second sealing surface 26 of the first groove 22 such that a seal is formed between the second sealing surface 26 of the first groove 22 and the second sealing surface 62 of the first insert ring 52A. In some examples, the first insert ring 52A at least partially contacts the first sealing surface 24 of the first groove 22 and the second sealing surface 26 of the first insert ring 52A such that a seal is formed between the first sealing surface 24 of the first groove 22 and the first sealing surface 60 of the first insert ring 52A, and a seal is also formed between the second sealing surface 26 of the groove 22 and the second sealing surface 62 of the first insert ring 52A.

[0033] 3 and 5, the second insert ring 52B may be sized and shaped to be at least partially inserted into the second groove 29 of the packing ring 19. A distance D3 between the second sealing surface 33 and the third surface 35 of the second groove 29 may be equal to or greater than a distance D2 measured between the second surface 62 and the third sealing surface 64 of the second insert ring 52B (see, for example, FIG. 6). The distance D2 between the second surface 62 and the third sealing surface 64 of the second insert ring 52B may be approximately the same as or less than the distance D3 between the second surface 33 and the third sealing surface 35 of the second groove 29. The second insert ring 52B has an axial width W a (see, e.g., FIG. 6 ) may be approximately the same as the axial width W6 measured between the inner ring surface 18 of the packing ring 19 and the first seal surface 31. In some embodiments, the second insert ring 52B has an axial width W a is approximately the same as the axial width W6.

[0034] Axial width W of second insert ring 52B amay vary based, in part, on the axial width W4 of the joint 42. When installed, the second insert ring 52B at least partially contacts the first sealing surface 31 of the second groove 29 such that a seal is formed between the first sealing surface 31 of the second groove 29 and the first sealing surface 60 of the second insert ring 52B. The second insert ring 52B also at least partially contacts the third sealing surface 35 of the second groove 29 such that a seal is formed between the third sealing surface 35 of the second groove 29 and the third sealing surface 64 of the second insert ring 52B. In some examples, the second insert ring 52B at least partially contacts the first sealing surface 31 and the third sealing surface 35 of the second groove 29, such that a seal is formed between the first sealing surface 31 of the second groove 29 and the first sealing surface 60 of the second insert ring 52B, and a seal is formed between the third sealing surface 35 of the second groove 29 and the third sealing surface 64 of the second insert ring 52B.

[0035] The insert ring(s) 52 can be secured within the first groove 22 and / or the second groove 29 using a variety of techniques, including, but not limited to, peening, welding, adhesives, press fitting, pinning, and combinations thereof. In some cases, different techniques can be utilized within the steam turbine assembly 10. FIG. 3 illustrates the steam turbine assembly 10 including different techniques for securing each of the insert rings 52 within the corresponding grooves 22, 29. However, the various installation techniques associated with the upstream and downstream grooves 22, 29 are in no way intended to be limiting, but merely illustrative of various embodiments. Thus, different mounting techniques can be used to retain the insert ring(s) 52 within one or both of the first and second grooves 22, 29. The mounting technique for retaining the insert ring 52 within the first groove 22 is not limited to the pinning technique, as shown in FIGS. 3 and 4 . The mounting technique for retaining the insert ring 52 within the second groove 29 is not limited to the peening technique, as shown in FIGS. 3 and 5 .

[0036] In some embodiments, the attachment technique for retaining the first insert ring 52A in the first groove 22 is a pinning technique, as shown in Figures 3 and 4. The first insert ring 52A is secured to the first groove 22 by a pin that extends beyond the axial width W of the body 54. a The through hole 56 is sized and shaped to receive a pin 58, such as a slotted spring pin or dowel pin. The pin 58 may have a diameter equal to or greater than the diameter of the through hole 56. The pin 58 has an axial width W a Length, axial width W a Length or axial width W a The pin 58 may be positioned within the through hole 56 of the first insert ring 52A and may be positioned proximate the surface 18 of the inner ring 16. Inserting the pin 58 into the through hole 56 of the first insert ring 52A may cause the second sealing surface 62 and the third surface 64 of the insert ring 52A to spread apart and contact the corresponding second sealing surface 26 and third surface 28 of the first groove 22. Thus, insertion of the pin 58 into the through hole 56 of the first insert ring 52A helps to retain the first insert ring 52A within the first groove 22. In some cases, two or more pins 58 may be utilized to retain the first insert ring 52A within the first groove 22. The pin 58 may be selected from a variety of pins 58, such as a pinch pin.

[0037] 3 and 5, the attachment technique for retaining the second insert ring 52B in the second groove 29 is a peening technique. For example, the second insert ring 52B is peened so that a portion 68 of the second face 33 of the packing ring 19 is deformed toward the second face 62 of the second insert ring 52B (FIG. 5). The deformed portion 68 at least partially retains the second insert ring 52B in the second groove 29 of the packing ring 19. In one embodiment, a peening tool (not shown), such as a punch or impact hammer, is angled relative to the second sealing face 33 of the packing ring 19 to form the peened area 68.

[0038] Although only one first insert ring 52A and one second insert ring 52B are depicted in the first groove 22 and the second groove 29, it should be understood that multiple insert rings 52 may be used. For example, as shown in FIG. 8 , in an exemplary embodiment, the steam turbine assembly 10 includes multiple insert rings 52 positioned axially relative to the longitudinal axis (L1). The multiple insert rings 52 may be selectively positioned at various circumferential positions relative to the longitudinal axis (L1). For example, in one embodiment, the front half 10A of the steam turbine assembly 10 may include a first quantity of insert rings 52, and the rear half (not shown) of the steam turbine assembly 10 may include a second quantity of insert rings 52. FIG. 8 is a downstream perspective view of the front half 10A of the steam turbine assembly 10 taken along line A-A in FIG. 2 . FIG. 8 illustrates multiple packing segments 19 positioned axially relative to the axis (L1) and positioned proximate to the inner ring 16. The plurality of insert rings 52 are depicted with cross-hatching and are positioned adjacent to the packing segments 19. The first and second quantities of insert rings 52 may be the same or different. It should be understood that various numbers of insert rings 52 may be used without departing from the spirit / scope of the present disclosure. For example, the front half 10A of the steam turbine assembly 10 may include one or more insert rings 52, and the rear half 10B of the steam turbine assembly 10 may include one or more insert rings 52.

[0039] In operation (FIG. 9), an exemplary method 100 for using insert rings 52 involves identifying a required seal location 102 for the packing seal relative to the packing ring 19 and identifying axial widths W3, W6 measured between the surface 18 of the inner ring 16 and the first seal faces 24, 31 of the packing ring 19. The preferred seal location is based on the axial distance 27' between the protrusion 21 of the packing ring 19 and the protrusion 25' of the rotor 23'. The axial distance 27' may vary in part depending on the turbine selected. The corresponding insert ring 52 has an axial width W that is approximately the same as or slightly less than the measured axial widths W3, W6. aThe insert ring 52 is then at least partially inserted into the first groove 22 and / or the second groove 29 defined in the packing ring 19. The insert ring 52 is fixedly secured within the first groove 22 and / or the second groove 29 of the packing ring 19 to improve the operating efficiency of the steam turbine assembly 10. The insert ring 52 is held in place as described herein so that the insert ring 52 remains in place during assembly of the steam turbine assembly 10.

[0040] Referring to FIG. 6, the body 54 of the insert ring 52 has an axial width W a The insert ring 52 has an axial width W a The insert ring may be available in a variety of standard sizes, as defined at least in part by the axial width W of the insert ring. a The axial width W of the body 54 may be graduated such that the axial width W of the body 54 is in the range of about 0.15 inches to about 0.50 inches. a may vary and depend in part on the overall size of the steam turbine assembly 10.

[0041] In some cases, the body 54 of the insert ring 52 may include multiple inserts (not shown). Each insert (not shown) may include a tear line (not shown) that allows for selective removal of one or more of the inserts (not shown) from the plurality of inserts (not shown). A tear line (not shown) may represent a reduced area of ​​material that allows for selective separation of at least one or more inserts (not shown) from the plurality of inserts (not shown). In some examples, the tear line (not shown) is not visible, but rather is created by removing one or more inserts (not shown) from the plurality of inserts (not shown). For example, in some embodiments, the tear line (not shown) is created by removing at least one insert (not shown) by bending, cutting, or the like. However, it should be understood that alternatives to tear lines (not shown) may be used without departing from the spirit / scope of the present disclosure.

[0042] FIG. 7 is a cross-sectional view of an exemplary steam turbine assembly 200 including an inner ring 16 and a packing ring 19 positioned relative to the inner ring 16. It should be understood that identical components are identified in FIG. 7 using the same reference numerals used in FIGS. 2, 3, and 5. The packing ring 19 includes a groove 29 opening to a joint 42, as best seen in FIG. 5. The packing ring 19 includes a first sealing face 31 defined opposite the joint 42. The packing ring 19 defines a second sealing face 33 adjacent to the first sealing face 31. The packing ring 19 also includes a third face 35 defined opposite the second sealing face 33. The first sealing face 31, the second sealing face 33, and the third face 35 at least partially define the groove 29.

[0043] Steam turbine assembly 200 includes an insertion pin 202 sized and shaped to be at least partially inserted directly or indirectly into groove 29. More specifically, insertion pin 202 may be press fit into groove 29 so as to directly or indirectly contact first sealing surface 31, second sealing surface 33, and third surface 35 of groove 29. Pin 202 has an axial width W a The insertion pin 202 has an axial width W a is smaller than the axial width W6. The axial clearance between the pin 202 and the groove 29 may be between about 0.2 inches and about 1 inch. It should be understood that the method described and illustrated with reference to FIG. 9 may be modified to include the insert pin 202. For example, the second insert ring 52B may be replaced with at least one insert pin 202. In some cases, two insert pins 202 may be inserted into the second groove 29.

[0044] At least some of the advantages of the system described herein over the prior art include at least the following: (i) selective adjustment of the axial position of the insert ring / plate, (ii) incremental adjustment of the insert ring / plate to facilitate repair, (iii) reduced downtime of the rotating machine, and (iv) reduced analysis required to select the appropriate insert ring / plate based on the determined axial width between the rotating machine components.

[0045] The systems described herein enable the retrofitting of steam turbine assemblies 10 and 200, thereby reducing the extent to which the systems are taken out of service completely, and in some cases, eliminating the need to remove them from service entirely. In some cases, for example, in the power generation industry, retrofitting steam turbine assemblies 10 and 200 may reduce the extent of outages and potentially result in cost savings to users and / or energy suppliers based in part on the extent of the outages.

[0046] The above description is illustrative only, and those skilled in the art will recognize that modifications can be made to the described embodiments without departing from the scope of the disclosed invention. Modifications that are within the scope of the invention will become apparent to those skilled in the art in light of a review of this disclosure. Such modifications are intended to be included within the scope of the appended claims. The systems described herein are not limited to the specific embodiments described herein, but rather portions of various systems may be utilized independently and separately from other systems described herein.

[0047] Although particular features of various embodiments of the invention may be shown in some drawings and not in others, this is for reasons of convenience. Moreover, the use of the phrase "one embodiment" in the above description is not intended to be interpreted as excluding the existence of additional embodiments that incorporate the recited features. In accordance with the principles of the present invention, any feature of a drawing may be referenced and / or claimed in combination with any feature of any other drawing.

[0048] Further aspects of the invention are provided by the subject matter of the following clauses. [Embodiment 1] An inserted ring for a turbine assembly, the turbine assembly includes a turbine stationary component, the turbine stationary component includes an inner ring and a packing segment positioned relative to the inner ring such that the inner ring and the packing segment define a steam joint therebetween, the insert ring includes a first face positioned adjacent to the inner ring and a second face positioned in close proximity to the packing segment such that the second face is spaced a distance from and opposite to the first face, the insert ring having an axial width defined by the first face and the second face. An inserted ring has an axial width defined by the first and second faces, an insert ring for a turbine assembly. [Embodiment 2] 10. The insert ring for a turbine assembly according to any preceding embodiment, wherein the insert ring includes a pin that is positioned within an opening of the inserted ring, the pin configured to at least partially retain the inserted ring relative to the inner ring and the packing segment. [Embodiment 3] 10. The insert ring for a turbine assembly of any preceding embodiment, wherein the packing segment includes a groove defined therein that opens towards the steam joint, and the inserted ring is sized to be inserted at least partially within the groove of the packing segment. [Embodiment 4] 10. The insert ring for a turbine assembly according to any preceding embodiment, wherein the packing segment includes a first seal face opposite from the portion of the groove that opens towards the steam joint, and the second face of the inserted ring at least partially contacts the first seal face of the turbine stationary component. [Embodiment 5] The insert ring has an axial width W ranging from about 0.15 inches to about 0.50 inches. a 10. The insert ring for a turbine assembly according to any preceding embodiment, wherein the inserted ring defines a body having an axial width Wa that is in a range between about 0.15 inches and about 0.50 inches. [Embodiment 6] 10. The insert ring for a turbine assembly according to any preceding embodiment, wherein the groove is a first groove, the packing segment further includes a second groove oppositely positioned from the first groove, the second groove opens towards a second steam joint defined between the inner ring and the packing segment, and the second groove is configured to at least partially receive a second inserted ring. [Embodiment 7] 10. The insert ring for a turbine assembly according to any preceding embodiment, wherein the packing segment defines a second seal face that is adjacent to the first seal face, the second face of the inserted ring at least partially contacts the first seal face of the packing segment, and a third face of the inserted ring at least partially contacts the second seal face of the packing segment. [Embodiment 8] 10. The insert ring for a turbine assembly according to any preceding embodiment, wherein the turbine assembly further comprises a biasing member positioned between the inner ring and the packing segment. [Embodiment 9] A turbine assembly including an inner ring and a packing segment, the packing segment positioned relative to the inner ring, the inner ring and the packing segment define a steam joint therebetween, the packing segment defines a groove open to the steam joint, the packing segment defines a first seal face within the groove and opposite from the portion open to the steam joint, and a second seal face within the groove and adjacent to the first seal face, the turbine assembly including an insert ring The inserted ring includes a body including a first face, a second face adjacent to the first face, and a third face opposite the first face.and a third face opposite from the first face, the first face is positioned in close proximity to the first seal face of the packing segment, the second face is positioned in close proximity to the second seal face of the packing segment, and the third face is positioned in close proximity to the inner ring, a turbine assembly. [Embodiment 10] The body of the insert ring has an axial width W in the range of about 0.25 inches to about 0.50 inches. a

[0023] The turbine assembly of any preceding embodiment, wherein the body of the inserted ring has an axial width Wa in a range between about 0.25 inches to about 0.50 inches. [Embodiment 11] The body of the insert ring has an axial width W ranging from about 0.15 inches to about 0.50 inches. a

[0023] The turbine assembly of any preceding embodiment, wherein the body of the inserted ring has an axial width Wa that is in a range between about 0.15 inches and about 0.50 inches. [Embodiment 12]

[0013] The turbine assembly of any preceding embodiment, wherein the inserted ring is fixedly secured within the groove of the packing segment by peening, welding, adhesives, press fitting, pinning, and combinations thereof. [Embodiment 13]

[0013] The turbine assembly of any preceding embodiment, wherein a biasing member is positioned between the inner ring and the packing segment. [Embodiment 14] 10. The turbine assembly of any preceding embodiment, wherein the groove is a first groove, the packing segment further includes a second groove oppositely positioned from the first groove, the second groove opens towards a second steam joint defined between the inner ring and the packing segment, and the second groove is configured to at least partially receive a second inserted ring. [Embodiment 15] 10. The turbine assembly of any preceding embodiment, wherein the insert ring includes a pin that is positioned within an opening of the inserted ring, the pin being configured to fixedly retain the inserted ring within the groove of the packing segment. [Embodiment 16] 10. The turbine assembly of any preceding embodiment, wherein the biasing member is selected from the group consisting of a radial spring, a coil spring, or a leaf spring. [Embodiment 17] 1. A method for selectively positioning an insert ring relative to a turbine assembly, the turbine assembly including an inner ring and a packing segment, the packing segment positioned relative to the inner ring to define a steam joint therebetween, the method including the steps of: identifying a seal position required at a packing seal location; identifying an axial width defined between a first seal face of the packing segment and a radially inner surface of the inner ring; and selecting an inserted ring having an axial width that is approximately the same as the axial width identified between the first seal face of the packing segment and the radially inner surface of the inner ring. inserting the inserted ring at least partially within a groove defined circumferentially within the packing segment; and fixedly securing the inserted ring within the groove of the packing segment to improve operational efficiency of the turbine assembly.within the groove of the packing segment to facilitate improving the operating efficiency of the turbine assembly. [Embodiment 18] 10. The method of any preceding embodiment, wherein selecting an inserted ring further includes selecting an inserted ring that includes a body that is positioned relative to the radially inner surface of the inner ring. [Embodiment 19]

[0023] The method of any preceding embodiment, wherein selecting an inserted ring further includes selecting an inserted ring that includes a body that has an axial width Wa that is in a range between about 0.15 inches and about 0.50 inches. [Embodiment 20]

[0013] The method of any preceding embodiment, wherein selecting an inserted ring further includes selecting an inserted ring that includes a first face and a second face adjacent to the first face, the first face of the inserted ring being positioned in close proximity to the first seal face of the packing segment, the second face of the inserted ring being positioned in close proximity to a third seal face adjacent to the first seal face of the packing segment, and the first and second faces of the inserted ring combining to produce a seal relative to the packing segment.

[0049] While the invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims. [Explanation of symbols]

[0050] 10, 200: Steam turbine assembly 10A: Front half 10B: Rear half 12: Casing 14: Diaphragm outer ring 15: Nozzle 16: Inner ring 19: Packing ring 21: Protrusion 22: First groove 23: Rotor 25: Protrusion 27: Axial distance 29: Second groove 30: Channel 31: First seal surface 32: Bias member / radial spring 33: Curved feature 34: First surface 35: Recess 36: Base segment 38: Neck segment 40: Hook base segment 42: Joint 44: Inner ring surface 46: Packing ring surface 52: Insert ring 52A: First insert ring 52B: Second insert ring 54: Main 56: Through hole 58, 202: Pin / insertion pin 60: First seal surface 62: Second seal surface 64: Third surface 66: Angled feature 67: Corner 68: Peened area / deformation

Claims

1. 1. An insert ring for a turbine assembly, comprising: The turbine assembly includes a turbine stationary component; The turbine stationary components include an inner ring and a packing segment; the packing segment is positioned relative to the inner ring such that the inner ring and the packing segment define a steam joint therebetween; The insert ring is a first surface positioned adjacent the inner ring; a second surface positioned proximate to the packing segment such that the second surface faces in a spaced-apart relationship from the first surface; An insert ring for a turbine assembly, wherein the insert ring has an axial width defined by first and second faces.

2. The insert ring for a turbine assembly of claim 1 , wherein the insert ring includes pins disposed within openings in the insert ring, the pins configured to at least partially retain the insert ring against the inner ring and the packing segments.

3. 10. The insert ring for a turbine assembly of claim 1, wherein the packing segment defines a groove therein that opens toward the steam joint, and the insert ring is sized to be inserted at least partially within the groove of the packing segment.

4. 4. The insert ring for a turbine assembly of claim 3, wherein the packing segment includes a first sealing surface opposite a portion of the groove that opens toward the steam joint, and a second surface of the insert ring at least partially contacts the first sealing surface of the turbine stationary component.

5. The insert ring has an axial width W ranging from about 0.15 inches to about 0.50 inches. ａ The insert ring for a turbine assembly according to claim 1 , defining a body having:

6. 4. The insert ring for a turbine assembly according to claim 3, wherein the groove is a first groove, the packing segment further includes a second groove disposed opposite the first groove, the second groove opening toward a second steam joint defined between the inner ring and the packing segment, the second groove configured to at least partially receive the second insert ring.

7. 5. The insert ring for a turbine assembly of claim 4, wherein the packing segment defines a second sealing surface adjacent the first sealing surface, the second surface of the insert ring at least partially contacting the first sealing surface of the packing segment, and the third surface of the insert ring at least partially contacting the second sealing surface of the packing segment.

8. The insert ring for a turbine assembly of claim 1 , wherein the turbine assembly further comprises a biasing member disposed between the inner ring and the packing segment.

9. 1. A turbine assembly comprising: an inner ring and a packing segment; the packing segment is positioned relative to the inner ring such that the inner ring and the packing segment define a steam joint therebetween; the packing segment defines a groove opening to the steam joint; the packing segment defines a first sealing surface within the groove opposite the portion opening to the steam joint, and a second sealing surface within the groove adjacent the first sealing surface; The turbine assembly includes an insert ring; The insert ring is a body including a first surface, a second surface adjacent to the first surface, and a third surface opposite the first surface; the first surface is located adjacent to the first sealing surface of the packing segment; the second surface is located adjacent to the second sealing surface of the packing segment; The third surface is located proximate the inner ring.

10. The body of the insert ring has an axial width W in the range of about 0.25 inches to about 0.50 inches. ａ The turbine assembly of claim 9 , comprising:

11. The body of the insert ring has an axial width W in the range of about 0.15 inches to about 0.50 inches. ａ The turbine assembly of claim 9 , comprising:

12. The turbine assembly of claim 9 , wherein the insert ring is secured within the groove of the packing segment by peening, welding, adhesive, press fit, pinning, or combinations thereof.

13. The turbine assembly of claim 9 , wherein the biasing member is disposed between the inner ring and the packing segment.

14. 10. The turbine assembly of claim 9, wherein the groove is a first groove, and the packing segment further includes a second groove disposed opposite the first groove, the second groove opening toward a second steam joint defined between the inner ring and the packing segment, the second groove configured to at least partially receive a second insert ring.

15. The turbine assembly of claim 9 , wherein the insert ring includes a pin positioned within the opening in the insert ring, the pin configured to fixedly retain the insert ring within the groove in the packing segment.

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