Steam seal ring

Abstract

The steam seal ring comprises a first ring part, a second ring part and a third ring part, and a first opening is formed in the inner wall of the first ring part; a second opening which is opposite to the first opening and is buckled with the first opening is formed in the outer wall of the second ring part, so that the second ring part can be coaxially and detachably nested in the first ring part and can rotate relative to the first ring part around the axis; and the elastic part is elastically connected to the opposite circumferential surfaces of the first opening and the second opening along the radial direction. Through the mutual cooperation of the first ring part, the second ring part and the elastic part, the overhaul and maintenance complexity of the steam sealing ring is reduced, the sealing effect and the adaptive capacity of the steam sealing ring are improved, when the steam sealing ring is subjected to external force, vibration can be effectively absorbed through the radial relative movement between the first ring part and the second ring part and the elastic effect of the elastic part, and the service life of the steam sealing ring is prolonged. Therefore, the influence of external force impact on the steam sealing ring is reduced, and the reliability of the steam sealing ring in the using process is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of steam turbine sealing, and in particular to a steam seal ring. Background Art

[0002] Steam seal rings are a crucial component in steam turbines, typically installed at both ends. They are categorized as high-pressure and low-pressure seal rings, depending on their installation location and the pressure they withstand. The design and manufacture of these seal rings require extreme precision to ensure that the size and shape of their clearances meet the operational requirements of the turbine. Their specialized shape and material create a defined gap between the seal ring and the rotor during turbine operation, effectively preventing steam leakage from the high-pressure to the low-pressure zone and improving turbine efficiency.

[0003] A steam seal ring for a steam turbine with application number CN202222403711.6 includes a plurality of fixed arc blocks and a plurality of rotating mechanisms. The plurality of rotating mechanisms correspond one-to-one to the plurality of fixed arc blocks, and the rotating mechanisms are all slidably arranged on the fixed arc blocks. The rotating mechanism includes a slider and a steam seal plate. The inner arc surface of the fixed arc block is provided with a slide groove. One end of the slider is slidably arranged in the slide groove. The slider is provided with a notch on one side outside the slide groove. The outer arc surface of the steam seal plate is fixedly provided with a connecting plate. Rotating shafts are symmetrically provided on both sides of the connecting plate. The other ends of the rotating shafts are both rotatably connected in the notch. The bottom of the notch is provided with a bottom hole connected to the slide groove. The utility model realizes the rotation of the steam seal plate within a certain range through the rotating mechanism, increases the adjustment range of the gap between the steam seal and the turbine main shaft, and reduces the probability of friction between the steam seal teeth and the main shaft due to vibration when the turbine is started and stopped.

[0004] The above-mentioned device reduces the friction generated by the turbine main shaft during use by adjusting the gap between the steam seal and the turbine main shaft. However, it has the same fixed structure as the existing structure during use, and is easily deformed by external forces and the main shaft, affecting the use effect of the structure. In addition, the device itself is inconvenient to disassemble and repair when damaged. Utility Model Content

[0005] The purpose of the present disclosure is to provide a steam seal ring to at least partially solve the technical problems existing in the related art.

[0006] In order to achieve the above objectives, the present disclosure provides a steam seal ring, comprising:

[0007] A first ring portion having an inner wall formed with a first opening;

[0008] A second ring portion has an outer wall formed with a second opening disposed opposite to and interlocked with the first opening, so as to be coaxially and detachably nested in the first ring portion and capable of relative rotation with the first ring portion around an axis; and

[0009] The elastic portion is elastically connected to the circumferential surface opposite to the first opening and the second opening in the radial direction.

[0010] Optionally, the first ring portion includes:

[0011] first ring body; and

[0012] The second ring body has a T-shaped cross-section, and the first vertical section of the T-shaped structure is detachably connected to the end face of the first ring body so that the cross-section of the first ring portion is an I-shaped structure, and the side of the I-shaped structure facing the second ring portion forms the first opening.

[0013] Optionally, it also includes:

[0014] A first insertion hole is provided on an end surface of the first horizontal section of the T-shaped structure;

[0015] a second socket, corresponding to the first socket, and formed on the end surface of the first ring body; and

[0016] The two ends of the latch are detachably inserted into the first insertion hole and the second insertion hole respectively.

[0017] Optionally, along the axial direction, one of the first ring body and the first vertical segment is formed with a first groove that is concave in a direction away from the other, and the other is formed with a first protrusion that is protruded to cooperate with the first groove.

[0018] Optionally, the second ring portion includes:

[0019] The third ring; and

[0020] The fourth ring body has an L-shaped cross-section, and the second vertical section of the L-shaped structure is detachably connected to the end face of the third ring body, so that the second ring portion has a C-shaped cross-section, and the opening of the C-shaped structure forms the second opening.

[0021] Optionally, one of the two end surfaces of the third ring body and the second horizontal section of the L-shaped structure that are close to each other is provided with a second groove that is concave in a direction away from the other, and the other is protruding to form a second protrusion for cooperating with the second groove.

[0022] Optionally, the elastic portion is composed of a plurality of compression springs whose elastic expansion and contraction directions are parallel to the radial direction, and the plurality of compression springs are arranged at intervals along the circumferential direction.

[0023] Optionally, it also includes a plurality of spring grooves for accommodating the compression springs, and the plurality of spring grooves are arranged at intervals on the first vertical segment corresponding to the plurality of compression springs. One end of the compression spring is fixedly connected to the inner wall of the spring groove, and the other end extends radially and protrudes from the spring groove and is fixedly connected to the second vertical segment.

[0024] Optionally, one of the two side walls of the first vertical section and the spring groove that are close to each other is formed with a third groove that is concave in a direction away from the other, and the other is protruding to form a third protrusion for cooperating with the third groove.

[0025] Optionally, it further includes a plurality of guide rods extending radially and arranged at intervals along the circumferential direction, one end of the guide rod is fixedly connected to one side of the second vertical segment, and the other end extends toward the direction close to the first vertical segment and extends into the interior of the compression spring.

[0026] Through the above technical solution, the first ring portion, the second ring portion and the elastic portion cooperate with each other, thereby reducing the complexity of the steam seal ring inspection and maintenance, improving the sealing effect and adaptability of the steam seal ring, and when the steam seal ring is subjected to external force, the radial relative movement between the first ring portion and the second ring portion and the elastic effect of the elastic portion can effectively absorb vibration, thereby reducing the impact of external force on the steam seal ring and improving the reliability of the steam seal ring during use.

[0027] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0029] Figure 1 is an exploded view of the overall structure of a steam seal ring provided by an exemplary embodiment of the present disclosure;

[0030] Figure 2 yes Figure 1 Enlarged view of part A;

[0031] Figure 3 is an exploded view of the overall structure of a steam seal ring provided by another exemplary embodiment of the present disclosure;

[0032] Figure 4 is a schematic diagram of the overall structure of a steam seal ring provided by an exemplary embodiment of the present disclosure;

[0033] Figure 5 is a schematic diagram of a partial structure of a steam seal ring provided in an exemplary embodiment of the present disclosure;

[0034] Figure 6 is a partial structural schematic diagram of a steam seal ring provided by another exemplary embodiment of the present disclosure;

[0035] Figure 7 is a cross-sectional view of the overall structure of a steam seal ring provided by an exemplary embodiment of the present disclosure;

[0036] Figure 8 yes Figure 5 A magnified view of the local structure of part B;

[0037] Figure 9 yes Figure 5 A magnified view of the local structure of part C.

[0038] Description of Reference Numerals

[0039] 1-first ring portion; 101-first opening; 11-first ring body; 12-second ring body; 121-first vertical section; 122-first horizontal section; 131-first groove; 132-first protrusion; 141-first plug hole; 142-second plug hole; 143-latch; 151-third groove; 16-fastening nut; 17-connector; 2-second ring portion; 201-second opening; 21-third ring body; 22-fourth ring body; 221-second vertical section; 222-second horizontal section; 231-second groove; 232-second protrusion; 3-elastic portion; 31-compression spring; 4-spring groove; 41-third protrusion; 5-guide rod; 6-sealing gasket. DETAILED DESCRIPTION

[0040] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0041] In this disclosure, unless otherwise indicated, directional terms such as "inner" and "outer" refer to the outlines of the corresponding components. Terms such as "first" and "second" are used to distinguish one element from another and do not imply order or importance. In addition, in the following description, when referring to the drawings, the same reference numerals in different drawings indicate the same or similar elements.

[0042] Reference Figures 1-9The present disclosure provides a steam seal ring, which may include a first ring portion 1, a second ring portion 2, and an elastic portion 3. The inner wall of the first ring portion 1 may be formed with a first opening 101. It is understood that the inner wall of the first ring portion 1 is radially contracted to form the first opening 101, so that the first opening 101 may be configured as an annular structure coaxial with the first ring portion 1. The outer wall of the second ring portion 2 is formed with a second opening 201. It is understood that the outer wall of the second ring portion 2 is radially contracted to form the second opening 201. The second opening 201 may be configured as an annular structure coaxial with the second ring portion 2. The second opening 201 can be radially opposite to the first opening 101, and the axial width of the second opening 201 can be smaller than that of the first opening 101, so that the second opening 201 can partially extend into the first opening 101 to interlock with the first opening 101. This allows the second ring portion 2 to be coaxially and removably nested within the first ring portion 1 and to rotate relative to the first ring portion 1 about the axis. While ensuring the sealing effect of the steam seal ring itself and during use, it can be disassembled and repaired when the steam seal ring needs to be repaired, reducing the complexity of replacement and maintenance. In addition, the relative rotation design between the first ring portion 1 and the second ring portion 2 enables the steam seal ring to adapt to different working conditions and effectively reduce friction and wear. The elastic portion 3 can be elastically connected in the radial direction to the circumferential surfaces opposite the first opening 101 and the second opening 201. While effectively absorbing vibration, it can also enable the first ring portion 1 and the second ring portion 2 to move relative to each other in the radial direction, thereby enabling the steam seal ring to adapt to certain radial displacements and enhancing the sealing performance.

[0043] Through the above technical solution, the first ring portion 1, the second ring portion 2 and the elastic portion 3 cooperate with each other, thereby reducing the complexity of the steam seal ring inspection and maintenance, and improving the sealing effect and adaptability of the steam seal ring. When the steam seal ring is subjected to external force, the radial relative movement between the first ring portion 1 and the second ring portion 2 and the elastic effect of the elastic portion 3 can effectively absorb vibration, thereby reducing the impact of external force on the steam seal ring and improving the reliability of the steam seal ring during use.

[0044] Reference Figure 1 、 Figure 3 、 Figure 4 、 Figure 7 as well as Figure 8The first ring portion 1 may include a first ring body 11 and a second ring body 12. The cross-sectional structure of the second ring body 12 may be a T-shaped structure, and the first vertical section 121 of the T-shaped structure is detachably connected to the end face of the first ring body 11, making installation and disassembly more convenient and reducing maintenance costs and time. Through the mutual cooperation between the T-shaped structure and the first ring body 11, the cross-sectional structure of the first ring portion 1 is an I-shaped structure, so that the first ring portion 1 has a larger end face area, and can effectively resist fatigue caused by bending and torsion, thereby enhancing the overall strength and stability, being able to withstand higher loads, and extending the service life of the steam seal ring. The side of the I-shaped structure facing the second ring portion 2 is formed as a first opening 101 to achieve a close fit with the second ring portion 2.

[0045] Reference Figures 1-4 Along the axial direction, one of the first ring body 11 and the first vertical section 121 is formed with a first groove 131 that is concave in a direction away from the other, and the other is formed with a first protrusion 132 that is configured to cooperate with the first groove 131. In the embodiment provided by the present disclosure, the first groove 131 can be formed on the second ring body 12, and the first protrusion 132 can be formed on the first ring body 11 for each first groove 131. The plug-in fit between the first groove 131 and the first protrusion 132 can effectively improve the stability of the connection between the first ring body 11 and the second ring body 12, reduce relative movement or displacement between the two, and ensure the overall stability of the steam seal ring. In addition, the groove and protrusion integrally formed with the first ring body 11 and the second ring body 12 can effectively improve the sealing effect between the first ring body 11 and the second ring body 12, while reducing the difficulty of docking the first ring body 11 and the second ring body 12, thereby improving assembly efficiency.

[0046] Reference Figure 1-Figure 3The steam seal ring may further include a first socket 141, a second socket 142 and a latch 143. The first socket 141 may be provided on the end face of the first horizontal section 122 of the T-shaped structure, the second socket 142 may be provided on the end face of the first ring body 11 corresponding to the first socket 141, and the two ends of the latch 143 may be detachably inserted into the first socket 141 and the second socket 142, respectively. Through the pluggable connection between the latch 143 and the first socket 141 and the second socket 142, the first ring body 11 and the second ring body 12 can be effectively connected together to prevent them from loosening or falling off, while also effectively reducing the complexity of disassembly and assembly of the first ring body 11 and the second ring body 12, making the operation easier when maintaining or replacing parts. In the embodiment provided by the present disclosure, the first socket 141, the second socket 142 and the latch 143 may be arranged in a plurality of corresponding manners along the circumferential direction, so as to improve the alignment accuracy and connection stability when the first ring body 11 and the second ring body 12 are installed. In the embodiment provided by the present disclosure, a joint 17 may be provided at the position of the first ring body 11 corresponding to the second insertion hole 142 and the position of the second ring body 12 corresponding to the first insertion hole 141, respectively. The joint 17 may have a length extending in the axial direction, and the pin 143 may pass through the joint 17 and extend into the first insertion hole 141 and the second insertion hole 142 to further improve the connection strength between the pin 143 and the first insertion hole 141 and the second insertion hole 142. And further, referring to Figure 1 and Figure 3 At least one of the first socket 141 and the second socket 142 can be embedded with a fastening nut 16, and at least one end of the pin 143 can be formed with an external thread that can be threadedly matched with the fastening nut 16, thereby further improving the fastening effect while achieving a detachable connection between the pin 143 and the first socket 141 and the second socket 142.

[0047] Reference Figure 1 、 Figure 3 、 Figure 6 as well as Figure 8, the second ring portion 2 may include a third ring body 21 and a fourth ring body 22. The cross-section of the fourth ring body 22 may be constructed as an L-shaped structure to provide better support and stability, ensuring that the second ring portion 2 can withstand a larger load without deformation. The second vertical section 221 of the L-shaped structure is detachably connected to the third ring body 21 to improve the convenience of replacement and maintenance. At the same time, the cross-section of the second ring portion 2 is constructed as a C-shaped structure, and the opening of the C-shaped structure is formed as a second opening 201. By cooperating with the above-mentioned I-shaped structure to effectively utilize the space, the first ring portion 1 and the second ring portion 2 are more compact during installation, and the sealing effect is effectively enhanced, reducing the difficulty of disassembly and assembly. In the embodiment provided in the present disclosure, a sealing gasket 6 is provided inside the fourth ring body 22. The sealing gasket 6 may be constructed as a ring-shaped structure and coaxially embedded inside the fourth ring body 22 to improve the sealing strength and play a buffering role when the second ring portion 2 cooperates with other components.

[0048] Reference Figure 1 、 Figure 3 as well as Figure 9 One of the two mutually adjacent end surfaces of the third ring body 21 and the second horizontal section 222 of the L-shaped structure may be provided with a second groove 231 that is concave in a direction away from the other, and the other may be formed with a second protrusion 232 that is convex and is used to cooperate with the second groove 231. In the embodiment provided by the present disclosure, the second groove 231 can be formed on the second horizontal section 222, and the second protrusion 232 can be formed on the third ring body 21 corresponding to the second groove 231. The plug-in cooperation between the second groove 231 and the second protrusion 232 can effectively improve the stability of the connection between the third ring body 21 and the fourth ring body 22, reduce the relative movement or displacement between the two, and ensure the overall stability of the steam seal ring. In addition, by integrally forming the groove and protrusion with the third ring body 21 and the fourth ring body 22, the sealing effect between the third ring body 21 and the fourth ring body 22 can be effectively improved, while reducing the difficulty of docking the third ring body 21 and the fourth ring body 22, thereby improving assembly efficiency.

[0049] Reference Figure 1 、 Figure 2 as well as Figure 5The elastic part 3 can be composed of a plurality of compression springs 31 whose elastic expansion and contraction directions are parallel to the radial direction, and the plurality of compression springs 31 are arranged at intervals along the circumferential direction, which can effectively disperse the load applied to the steam seal ring and reduce local stress concentration. At the same time, the compression spring 31 can effectively absorb and buffer external shocks or vibrations, reduce the impact on the various components of the steam seal ring, and improve the seismic performance of the steam seal ring. In addition, a plurality of independent compression springs 31 make it possible to replace or adjust a certain spring separately during maintenance without having to dismantle the entire structure, thereby reducing maintenance costs and time. In the embodiments provided in the present disclosure, the number and elastic coefficient of the compression springs 31 can be adjusted as needed to adapt to different application scenarios and load requirements. Therefore, the present disclosure does not limit this.

[0050] Reference Figure 1-Figure 3 、 Figure 5 as well as Figure 8 The steam seal ring may further include a plurality of spring slots 4 for accommodating the compression springs 31. The plurality of spring slots 4 may be arranged on the first vertical section 121 at intervals corresponding to the plurality of compression springs 31. One end of the compression spring 31 is fixedly connected to the inner wall of the spring slot 4, and the other end extends radially and protrudes from the spring slot 4 and is fixedly connected to the second vertical section 221. The provision of the spring slot 4 provides a relatively stable fixed position for the compression spring 31, so that the compression spring 31 can remain stable during operation, reducing the risk of movement or failure. In the embodiments provided by the present disclosure, as Figure 8 As shown, the spring groove 4 can be constructed as a semi-enclosed box-shaped structure to effectively utilize the installation space of the steam seal ring, avoid exposure of the compression spring 31, improve the compactness of the overall structure, reduce the friction between the compression spring 31 and the external structure, and improve the durability of the elastic part 3.

[0051] Reference Figure 5 and Figure 8 One of the two side walls of the first vertical section 121 and the spring slot 4 that are close to each other can be formed with a third groove 151 that is concave in a direction away from the other, and the other side can be formed with a third protrusion 41 that is used to cooperate with the third groove 151. In the embodiment provided by the present disclosure, the side of the first vertical section 121 facing the spring slot 4 can be formed with a third groove 151 that is concave in a direction away from the spring slot 4, and the corresponding third groove 151 on the spring slot 4 can be formed with a third protrusion 41 that protrudes in a direction close to the first vertical section 121. Such a design can form a better sealing effect, improve the connection strength between the first vertical section 121 and the spring slot 4, and provide a better positioning function, ensuring that the first vertical section 121 and the spring slot 4 can be accurately aligned during assembly, reducing assembly errors. In the embodiment provided by the present disclosure, the third groove 151 and the third protrusion 41 can be pluggable and connected to facilitate the installation and removal of the first vertical section 121 and the spring slot 4, making it more convenient for maintenance personnel to operate.

[0052] Reference Figure 3 、 Figure 6 、 Figure 8 as well as Figure 9 The steam seal ring may further include a plurality of guide rods 5 extending radially and arranged at intervals along the circumferential direction. One end of the guide rod 5 may be fixedly connected to one side of the second vertical segment 221, and the other end of the guide rod 5 extends toward the direction close to the first vertical segment 121 and extends into the interior of the compression spring 31 to ensure that the compression spring 31 always expands and contracts in a direction parallel to the radial direction, thereby avoiding deviation of the compression spring 31 during its operation and improving the stability and reliability of the compression spring 31 during its operation.

[0053] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0055] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A steam seal ring, characterized in that: include: A first ring portion having an inner wall formed with a first opening; The second ring portion has an outer wall formed with a second opening arranged opposite to the first opening and interlocked with each other, so as to be coaxially and detachably nested in the first ring portion and capable of relative rotation with the first ring portion around an axis; as well as The elastic portion has an elastic expansion and contraction direction parallel to the radial direction and is connected to the circumferential surface opposite to the first opening and the second opening.

2. The steam seal ring according to claim 1, characterized in that: The first ring portion includes: first ring body; and The second ring body has a T-shaped cross-section, and the first vertical section of the T-shaped structure is detachably connected to the end face of the first ring body, so that the cross-section of the first ring portion is an I-shaped structure, and the side of the I-shaped structure facing the second ring portion forms the first opening.

3. The steam seal ring according to claim 2, characterized in that: Also includes: A first insertion hole is provided on an end surface of the first horizontal section of the T-shaped structure; a second socket, corresponding to the first socket, and opened on the end surface of the first ring body; as well as The two ends of the latch are detachably inserted into the first insertion hole and the second insertion hole respectively.

4. The steam seal ring according to claim 2, characterized in that: Along the axial direction, one of the first ring body and the first vertical segment is formed with a first groove that is concave in a direction away from the other, and the other is formed with a first protrusion that is convex and is used to cooperate with the first groove.

5. The steam seal ring according to claim 4, characterized in that: The second ring portion includes: The third ring; and The fourth ring body has an L-shaped cross-section, and the second vertical section of the L-shaped structure is detachably connected to the end face of the third ring body, so that the second ring portion has a C-shaped cross-section, and the opening of the C-shaped structure forms the second opening.

6. The steam seal ring according to claim 5, characterized in that: One of the two end surfaces of the third ring body and the second horizontal section of the L-shaped structure close to each other is provided with a second groove concave in a direction away from the other, and the other is protruding to form a second protrusion for cooperating with the second groove.

7. The steam seal ring according to claim 5, characterized in that: The elastic portion includes a plurality of compression springs whose elastic expansion and contraction directions are parallel to the radial direction, and the plurality of compression springs are arranged at intervals along the circumferential direction.

8. The steam seal ring according to claim 7, characterized in that: It also includes a plurality of spring grooves for accommodating the compression springs, and the plurality of spring grooves are arranged at intervals on the first vertical segment corresponding to the plurality of compression springs. One end of the compression spring is fixedly connected to the inner wall of the spring groove, and the other end extends radially and protrudes from the spring groove and is fixedly connected to the second vertical segment.

9. The steam seal ring according to claim 8, characterized in that: One of the two side walls of the first vertical section and the spring groove close to each other is formed with a third groove concave in a direction away from the other, and the other is protruding to form a third protrusion for cooperating with the third groove.

10. The steam seal ring according to claim 8, characterized in that: It also includes a plurality of guide rods extending radially and arranged at intervals along the circumferential direction, one end of the guide rod is fixedly connected to one side of the second vertical segment, and the other end extends toward the direction close to the first vertical segment and extends into the interior of the compression spring.

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