Large-cavity multi-stage drainage type steam seal

Abstract

The utility model provides a large-cavity multi-stage drainage type steam seal, which belongs to the technical field of steam seals and comprises a collecting cavity, an adjusting component arranged at the bottom of the collecting cavity, a connecting ring clamped on the inner wall of the collecting cavity, a connecting pipe communicated with the bottom of the connecting ring, a sealing tooth fixedly connected to the end part of the connecting pipe, and a through hole formed in the center of the sealing tooth, the fixing hole is formed in the bottom of the connecting ring. Through the arrangement of the collecting cavity, steam is effectively collected and guided, leakage is reduced, and the energy utilization efficiency is improved; by arranging the adjusting assembly, the adaptability of the steam seal is higher, and the steam seal can adapt to different working conditions; the combination of the extrusion spring and the sealing strip ensures good sealing performance, and meanwhile, the flexibility of the structure is kept; due to the design of the connecting ring, the overall stability and durability are enhanced; in addition, through clamping connection of a clamping block and a clamping groove and arrangement of a communicating groove, convenient installation and maintenance are achieved, and the operation efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of steam seal technology, specifically relating to a large-chamber multi-stage drainage steam seal. Background Technology

[0002] Large-chamber multi-stage flow-through steam seals are sealing devices used in steam turbines or other rotating equipment. They are designed to improve sealing efficiency and reduce steam leakage. This type of steam seal is typically suitable for high-temperature, high-pressure, and high-speed steam environments. It can achieve better sealing performance by increasing the number of chambers and optimizing the flow channel design without changing the original steam seal structure. In industrial applications, this type of steam seal is of great significance for improving equipment operating efficiency and reliability.

[0003] Traditional steam seals operate on a labyrinth seal principle, with each seal ring meticulously machined with sealing teeth. These teeth, together with the rotor surface, form a labyrinthine channel. When steam (or gas, liquid) flows through these channels, its velocity and pressure change accordingly due to the change in the channel cross-section, undergoing multiple expansions and throttling processes, thereby consuming energy, reducing leakage, and achieving a sealing effect. To achieve an ideal sealing effect, traditional steam seals require a sufficiently long seal and a sufficient number of sealing teeth. However, due to limitations in on-site conditions, these requirements cannot be met, making it difficult to achieve the best sealing effect. Therefore, a large-chamber, multi-stage drainage steam seal is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a large-chamber, multi-stage drainage steam seal, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A large-chamber multi-stage drainage steam seal includes a collection chamber, an adjustment component disposed at the bottom of the collection chamber, a connecting ring snapped into the inner wall of the collection chamber, a connecting pipe communicating with the bottom of the connecting ring, a sealing tooth fixedly connected to the end of the connecting pipe, a through hole opened in the center of the sealing tooth, and a fixing hole disposed at the bottom of the connecting ring.

[0007] As a preferred embodiment of the present invention, the collecting cavity includes a shell, a fixing frame fixedly installed on the inner wall of the shell, and a compression spring fixedly connected to the center of the fixing frame.

[0008] As a preferred embodiment of this utility model, the collecting cavity further includes a connecting block inserted into the center of the compression spring, a sealing strip fixedly connected to the end of the connecting block, and a chamber opened in the center of the outer shell.

[0009] As a preferred embodiment of this utility model, the inner wall of the outer shell is arranged in a ring with the fixing frame, the compression spring and the connecting block, and the sealing strip is a rubber strip.

[0010] As a preferred embodiment of this utility model, the connecting ring includes a fixing block, a movable groove formed in the center of the fixing block, a plug rod fixedly connected to the inner wall of the movable groove, and a limiting spring sleeved on the side wall of the plug rod.

[0011] As a preferred embodiment of the present invention, the connecting ring further includes a pressing block sleeved on the end of the plug rod, a slot formed on the side surface of the pressing block, a locking block fixedly connected to the side surface of the fixing block, and a communicating groove provided on the side wall of the pressing block.

[0012] In a preferred embodiment of this utility model, the card block engages with the card slot, the squeezing block contacts the limiting spring, and the connecting groove communicates with the chamber.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: the collection chamber effectively collects and guides steam, reducing leakage and improving energy efficiency; the adjustment components make the steam seal more adaptable and able to adapt to different working conditions; the combination of the compression spring and the sealing strip ensures good sealing performance while maintaining structural flexibility; the connecting ring design enhances overall stability and durability; in addition, the snap-fit ​​between the locking block and the slot, as well as the connecting groove, enables convenient installation and maintenance, improves operating efficiency, and is suitable for the sealing needs of various steam systems. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a top view of the structure of this utility model;

[0018] Figure 4 This is a schematic cross-sectional view of the collection cavity of this utility model;

[0019] Figure 5This is a cross-sectional view of the connecting ring structure of this utility model.

[0020] In the diagram: 101, collecting chamber; 102, adjusting component; 103, connecting ring; 104, connecting pipe; 105, sealing tooth; 106, through hole; 107, fixing hole; 101a, outer shell; 101b, fixing frame; 101c, compression spring; 101d, connecting block; 101e, sealing strip; 101f, chamber; 103a, fixing block; 103b, moving groove; 103c, plug rod; 103d, limiting spring; 103e, compression block; 103f, slot; 103g, locking block; 103h, connecting groove. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0024] Example

[0025] Reference Figure 1-5 This is an embodiment of the present invention, which provides a large-chamber multi-stage drainage steam seal, comprising:

[0026] The collection chamber 101, the adjustment component 102 disposed at the bottom of the collection chamber 101, the connecting ring 103 snapped into the inner wall of the collection chamber 101, the connecting pipe 104 communicating with the bottom of the connecting ring 103, the sealing tooth 105 fixedly connected to the end of the connecting pipe 104, the through hole 106 opened in the center of the sealing tooth 105, and the fixing hole 107 disposed at the bottom of the connecting ring 103.

[0027] The multi-stage induced draft steam seal with large chamber 101f consists of sealing teeth 105 and large chambers 101f. Without altering the original steam seal structure, several large chambers 101f are added, expanding the steam flow channel. When the gas flows through the gaps between the tooth tips of each annular ring, a throttling effect occurs, reducing the pressure and temperature within the gaps. When the gas flows through each expansion chamber 101f, a series of isenthalpic thermodynamic processes occur. Due to the sudden expansion of volume, the gas expands and generates violent vortices. In the chamber 101f, whose volume is much larger than the gap volume, the gas velocity is almost zero. At this point, most of the kinetic energy of the vapor flow is converted into heat energy and absorbed by the vapor in chamber 101f. The vapor temperature rises from the temperature when it flows through the gap to the temperature before it flows into the gap. However, the pressure in chamber 101f rises only slightly, keeping the enthalpy of the vapor flow close to the value before the gap. The vapor flow retains a small amount of kinetic energy and passes through the next stage tooth tip gap with residual velocity to continue reducing pressure and flow rate. By repeating the above throttling and isenthalpic thermodynamic process stage by stage, the residual velocity of the vapor is very low, the vapor pressure gradually decreases, and finally the amount of vapor leakage is very small, thus achieving a sealing effect.

[0028] The collection chamber 101 includes a housing 101a, a fixing frame 101b fixedly installed on the inner wall of the housing 101a, and a compression spring 101c fixedly connected to the center of the fixing frame 101b.

[0029] The collection chamber 101 also includes a connecting block 101d inserted into the center of the compression spring 101c, a sealing strip 101e fixedly connected to the end of the connecting block 101d, and a chamber 101f opened in the center of the outer shell 101a.

[0030] Specifically, firstly, steam enters chamber 101f through outer shell 101a. The compression spring 101c and connecting block 101d within chamber 101f initially guide and regulate the steam. Simultaneously, the sealing strip 101e ensures effective sealing of the steam within chamber 101f. Next, the steam flows through connecting pipe 104 at the bottom of connecting ring 103. Adjusting component 102, located at the bottom of collection chamber 101, can be adjusted as needed to optimize steam flow and collection efficiency. Then, the steam passes through sealing teeth 105 at the end of connecting pipe 104. A central through-hole 106 allows continued steam flow, while a fixing hole 107 ensures the stable position of connecting ring 103. Throughout this process, collection chamber 101 effectively collects steam and, through its multi-stage flow design, reduces leakage and improves steam utilization efficiency.

[0031] The inner wall of the outer casing 101a has a ring array of fixing frames 101b, compression springs 101c and connecting blocks 101d, and the sealing strip 101e is a rubber strip.

[0032] The connecting ring 103 includes a fixed block 103a, a movable groove 103b opened in the center of the fixed block 103a, a plug rod 103c fixedly connected to the inner wall of the movable groove 103b, and a limiting spring 103d sleeved on the side wall of the plug rod 103c.

[0033] The connecting ring 103 also includes a pressing block 103e sleeved on the end of the plug rod 103c, a slot 103f opened on the side surface of the pressing block 103e, a locking block fixedly connected to the side surface of the fixing block 103a, and a connecting groove 103g provided on the side wall of the pressing block 103e.

[0034] The card block engages with the card slot 103f, the pressing block 103e contacts the limiting spring 103d, and the connecting slot 103g communicates with the chamber 101f.

[0035] It should be noted that steam enters the chamber 101f inside the outer shell 101a and is initially guided and regulated by the fixed frame 101b, compression spring 101c, and connecting block 101d in an annular array. The rubber sealing strip 101e ensures the airtightness. Subsequently, the steam passes through the connecting ring 103, where a plug rod 103c is fixed to the inner wall of the moving groove 103b on the fixed block 103a. A limit spring 103d is fitted on the side wall of the plug rod 103c. The compression block 103e is fitted onto the end of the plug rod 103c and is fixed to the side surface of the fixed block 103a by the snap-fit ​​of the snap-fit ​​block and the snap-fit ​​groove 103f. At the same time, the compression block 103e contacts the limit spring 103d to provide adjustment and sealing. The connecting groove 103g is provided on the side wall of the compression block 103e and communicates with the chamber 101f, allowing steam to pass through and be further guided to the connecting pipe 104. The design of the connecting ring 103 allows for precise control of steam flow while maintaining structural stability and airtightness.

[0036] In use, steam first enters the chamber 101f inside the outer casing 101a, where it is initially guided and regulated by the annular array of fixing frames 101b, compression springs 101c, and connecting blocks 101d. A rubber sealing strip 101e ensures the steam is airtight. Subsequently, the steam passes through the connecting ring 103, where a plug-in rod 103c is fixed to the inner wall of the moving groove 103b on the fixing block 103a. A limit spring 103d is fitted onto the side wall of the plug-in rod 103c. The compression block 103e is fitted onto the end of the plug-in rod 103c and fixed to the fixing block 101a by a locking block engaging with the locking groove 103f. On the side surface of 03a, the extrusion block 103e contacts the limiting spring 103d, providing adjustment and sealing. The connecting groove 103g is provided on the side wall of the extrusion block 103e and communicates with the chamber 101f, allowing steam to pass through and be further guided to the connecting pipe 104. At the sealing tooth 105 at the end of the connecting pipe 104, the steam continues to flow through the central through hole 106, while the fixing hole 107 ensures the stability of the connecting ring 103. The collecting chamber 101 effectively collects steam, reduces the residual velocity and pressure of the gas, reduces external leakage, thereby improving the steam utilization efficiency and sealing performance.

[0037] In summary, the residual velocity and pressure of the gas are reduced through the throttling effect and isenthalpic thermodynamic process, thereby greatly reducing the amount of gas leakage and improving the sealing performance. At the same time, the design of the connecting ring 103 and the regulating component 102 enables precise control and regulation of the steam flow, ensuring the stability and sealing performance of the structure. In addition, the use of the rubber sealing strip 101e enhances the sealing effect, improves the steam utilization efficiency, and reduces energy consumption, making it suitable for steam systems that require high sealing performance and high efficiency.

[0038] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0039] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0040] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A large-chamber, multi-stage drainage-type steam seal, characterized in that: include, The collection chamber (101), the adjustment assembly (102) disposed at the bottom of the collection chamber (101), the connecting ring (103) snapped into the inner wall of the collection chamber (101), the connecting pipe (104) communicating with the bottom of the connecting ring (103), the sealing tooth (105) fixedly connected to the end of the connecting pipe (104), the through hole (106) opened in the center of the sealing tooth (105), and the fixing hole (107) disposed at the bottom of the connecting ring (103).

2. The large-chamber multi-stage drainage steam seal according to claim 1, characterized in that: The collection chamber (101) includes a shell (101a), a fixing frame (101b) fixedly installed on the inner wall of the shell (101a), and a compression spring (101c) fixedly connected to the center of the fixing frame (101b).

3. The large-chamber multi-stage drainage steam seal according to claim 2, characterized in that: The collection chamber (101) also includes a connecting block (101d) inserted into the center of the compression spring (101c), a sealing strip (101e) fixedly connected to the end of the connecting block (101d), and a chamber (101f) opened in the center of the outer shell (101a).

4. A large-chamber multi-stage drainage steam seal according to claim 3, characterized in that: The inner wall of the outer shell (101a) is arranged in a ring with the fixing frame (101b), the compression spring (101c) and the connecting block (101d), and the sealing strip (101e) is a rubber strip.

5. A large-chamber multi-stage drainage steam seal according to claim 4, characterized in that: The connecting ring (103) includes a fixed block (103a), a movable groove (103b) opened in the center of the fixed block (103a), a plug rod (103c) fixedly connected to the inner wall of the movable groove (103b), and a limiting spring (103d) sleeved on the side wall of the plug rod (103c).

6. A large-chamber multi-stage drainage steam seal according to claim 5, characterized in that: The connecting ring (103) also includes a pressing block (103e) sleeved on the end of the plug rod (103c), a slot (103f) formed on the side surface of the pressing block (103e), a locking block fixedly connected to the side surface of the fixing block (103a), and a connecting groove (103h) provided on the side wall of the pressing block (103e).

7. A large-chamber multi-stage drainage steam seal according to claim 6, characterized in that: The card block engages with the card slot (103f), the pressing block (103e) contacts the limiting spring (103d), and the connecting groove (103h) communicates with the chamber (101f).

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