Multi-path guiding disturbance energy-saving steam seal body and steam seal
By designing a multi-path guided turbulence energy-saving steam seal body, and utilizing the flow guide teeth and energy dissipation cavity structure, the problems of increased sealing gap and insufficient energy utilization in traditional steam seal structures are solved, achieving efficient steam flow sealing and energy consumption, and improving equipment performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHIWEI POWER WUXI CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-07-10
AI Technical Summary
Traditional steam seal structures experience increased sealing gaps during long-term operation, leading to increased steam or gas leakage, significant energy waste, and failure to fully utilize steam flow energy to enhance sealing performance.
A multi-path guided turbulence energy-saving steam seal body is designed. By setting up a variety of guide teeth and energy dissipation cavity structures, the high-pressure gas is guided to flow along different paths, forming vortices and multiple convergences, which enhances the steam resistance effect and reduces the leakage rate.
It effectively reduces steam leakage, improves sealing performance, and enhances equipment energy efficiency and operational stability.
Smart Images
Figure CN224478962U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an energy-saving steam seal, and more specifically, to a multi-path guided turbulence energy-saving steam seal body and steam seal. Background Technology
[0002] In the fields of energy and industrial processing, rotating equipment such as steam turbines and compressors are core equipment for energy conversion and gas transportation. Steam seals, as key components of these devices, directly affect the energy efficiency and operational stability of the equipment. Traditional steam seal structures, under long-term operation, are affected by wear, fluctuations in operating conditions, and other factors, leading to a gradual increase in sealing gaps, resulting in increased steam or gas leakage, energy waste, and decreased equipment performance. Furthermore, traditional steam seals have a simple method of controlling steam flow, failing to fully utilize the energy loss of steam flow to enhance the sealing effect. With the increasing demands for energy conservation, emission reduction, and high-performance equipment operation in industry, the development of new, high-efficiency steam seals is urgently needed. Utility Model Content
[0003] The purpose of this utility model is to address the shortcomings of the prior art by providing a multi-path guiding and turbulence-reducing energy-saving steam seal body and steam seal that reduces leakage.
[0004] The technical solution of this utility model is as follows: a multi-path guided turbulence energy-saving steam seal body, with a steam seal part on the inner end face that corresponds one-to-one with the boss on the outer rotor.
[0005] The steam seal includes a first guide tooth opposite to the high-pressure gas, a first energy dissipation cavity is provided on the inner end face of the steam seal body between the first guide tooth and the corresponding boss, and a second energy dissipation cavity is provided on the front side of the first energy dissipation cavity along the steam flow direction.
[0006] The front end face of the boss is opposite to the inlet of the first energy dissipation chamber; the inlet and outlet of the second energy dissipation chamber are both located above the corresponding boss, and a first diverting tooth is provided between the outlet of the second energy dissipation chamber and the inlet of the first energy dissipation chamber.
[0007] The high-pressure gas moving axially enters the steam seal section through the first guide tooth, and is guided to turn radially outward at the front end face of the corresponding boss. Part of it enters the first energy dissipation chamber, and part of it enters the second energy dissipation chamber after passing through the first diverting tooth.
[0008] A multi-path guided turbulence-reducing energy-saving steam seal includes a multi-path guided turbulence-reducing energy-saving steam seal body.
[0009] The aforementioned multi-path guided turbulence energy-saving steam seal also includes a rotor that passes through the steam seal, with several protrusions distributed at intervals along the axial direction on the rotor.
[0010] The front end face of the boss is opposite to the inlet of the first energy dissipation chamber; the inlet and outlet of the second energy dissipation chamber are both located above the corresponding boss, and a first diverting tooth is provided between the outlet of the second energy dissipation chamber and the inlet of the first energy dissipation chamber.
[0011] The high-pressure gas moving axially enters the steam seal section through the first guide tooth, and is guided to turn radially outward at the front end face of the corresponding boss. Part of it enters the first energy dissipation chamber, and part of it enters the second energy dissipation chamber after passing through the first diverting tooth.
[0012] In the above-mentioned multi-path guided turbulence energy-saving steam seal, a vortex groove is provided on the inner end face of the steam seal body between the inlet and outlet of the first energy dissipation cavity. The high-pressure gas part guided by the boss enters the vortex groove to form a vortex.
[0013] In the above-mentioned multi-path guided turbulence energy-saving steam seal, a second diverting tooth is formed between the inlet of the first energy dissipation cavity and the vortex groove. The second diverting tooth is inclined toward one side of the vortex groove. The high-pressure gas guided by the boss is diverted by the second diverting tooth and enters the vortex groove and the first energy dissipation cavity respectively.
[0014] In the above-mentioned multi-path guided turbulence energy-saving steam seal, a second guide tooth is provided at the inlet of the second energy dissipation cavity, and the distance between the second guide tooth and the first diverting tooth and the upper surface of the corresponding boss is the same;
[0015] In the above-mentioned multi-path guided turbulence energy-saving steam seal, a third guide tooth is provided between the second guide tooth and the first diverter tooth, and the third guide tooth is 1.2-1.5mm lower than the first diverter tooth.
[0016] The third guide tooth and the first diverter tooth work together to form the outlet of the second energy dissipation cavity, and the third guide tooth and the second guide tooth work together to form the inlet of the second energy dissipation cavity.
[0017] In the above-mentioned multi-path guided turbulence energy-saving steam seal, the energy dissipation channel in the first energy dissipation cavity is inverted U-shaped, and an energy dissipation rib is protruding at the bottom of the energy dissipation channel. An energy dissipation groove is provided on the inner wall of the energy dissipation channel corresponding to the energy dissipation rib.
[0018] In the aforementioned multi-path guided turbulence-saving gas seal, the root of the third guide tooth is formed with a turbulence step.
[0019] After adopting the above structure, the main steam flow after entering the steam seal section through the first guide tooth is guided by the front end face of the boss to turn radially outward. Under the action of the first diverting tooth, it is divided into two streams. One part enters the first energy dissipation chamber and flows out from the back of the first guide tooth, merging with the main flow and obstructing the main flow, thus reducing the steam leakage speed.
[0020] Another portion of the steam flow flows along the gap between the boss and the first diverting tooth to the low-pressure end and enters the second energy dissipation chamber. It then flows back to the back of the first diverting tooth, where it intersects with the mainstream flow, creating obstruction and interference. Under the guidance of the mainstream flow, it flows towards the low-pressure end and re-enters the second energy dissipation chamber. This cycle continues, constantly enhancing the steam resistance effect and improving the sealing performance. Attached Figure Description
[0021] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings, but this does not constitute any limitation on the present invention.
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0024] Figure 3 This is a partial structural diagram of point A of this utility model.
[0025] In the figure: 1. Steam seal body; 2. Rotor; 3. Boss; 4. Steam seal section; 5. First guide tooth; 6. First energy dissipation cavity; 7. Second energy dissipation cavity; 8. First diverting tooth; 9. Vortex groove; 10. Second diverting tooth; 11. Second guide tooth; 12. Third guide tooth; 13. Energy dissipation rib; 14. Energy dissipation groove; 15. Turbulence step section. Detailed Implementation
[0026] See Figure 1-3 As shown, the present invention provides a multi-path guided turbulence energy-saving steam seal body, wherein a steam seal part 4 is provided on the inner end face; the steam seal body includes an outer ring for cooperating and connecting with the turbine cylinder block, and an inner ring for cooperating with the rotor shaft, wherein the steam seal part is provided on the inner ring.
[0027] The steam seal section 4 includes a first guide tooth 5 opposite to the high-pressure gas. A first energy dissipation cavity 6 is provided on the inner end face of the steam seal body 1 between the first guide tooth 5 and the corresponding external rotor boss. A second energy dissipation cavity 7 is provided on the front side of the first energy dissipation cavity 6 along the steam flow direction.
[0028] The front end face of the external rotor boss 3 is opposite to the inlet of the first energy dissipation chamber 6; the inlet and outlet of the second energy dissipation chamber 7 are both located above the corresponding external rotor boss 3, and a first diverting tooth 8 is provided between the outlet of the second energy dissipation chamber 7 and the inlet of the first energy dissipation chamber 6.
[0029] The high-pressure gas moving axially enters the steam seal section 4 through the first guide tooth 5, and is guided to turn radially outward at the front end face of the corresponding external rotor boss 3. Part of it enters the first energy dissipation chamber 6, and part of it enters the second energy dissipation chamber 7 after passing through the first diverting tooth 8.
[0030] After entering the steam seal section through the first guide tooth, the main steam flow is guided by the front end face of the boss and turns radially outward. Under the action of the first diverting tooth, it is divided into two streams. One part enters the first energy dissipation chamber and flows out from the back of the first guide tooth, merging with the main flow and obstructing the main flow, thus reducing the steam leakage speed.
[0031] Another portion of the steam flow flows along the gap between the boss and the first diverting tooth to the low-pressure end and enters the second energy dissipation chamber. It then flows back to the back of the first diverting tooth, where it intersects with the mainstream flow, creating obstruction and interference. Under the guidance of the mainstream flow, it flows towards the low-pressure end and re-enters the second energy dissipation chamber. This cycle continues, constantly enhancing the steam resistance effect and improving the sealing performance.
[0032] A multi-path guided turbulence energy-saving steam seal includes a steam seal body 1.
[0033] In this embodiment, a rotor 2 is also included, which is inserted into the steam seal body 1, and a plurality of bosses 3 are distributed axially at intervals on the rotor 2.
[0034] The rotor is the core component of the steam turbine, and its outer surface has several bosses distributed along the axial direction. The steam seal achieves the sealing of high-pressure gas by cooperating with the rotor and its surface bosses. The rotor and its surface bosses are not the technical points to be protected by this utility model, and will not be described in detail here.
[0035] In this embodiment, preferably, a vortex groove 9 is provided on the inner end face of the steam seal body 1 between the inlet and outlet of the first energy dissipation chamber 6. A portion of the high-pressure steam, guided by the boss 3, enters the vortex groove 9 to form a vortex. When the main steam flow is guided by the front end face of the boss to turn radially outward, a portion of the radial steam flow enters the vortex groove before entering the first energy dissipation chamber. Constrained and disturbed by the groove wall, it forms vortices of varying sizes, further consuming energy and altering the flow characteristics. Simultaneously, it is diverted by the steam flow at the outlet of the first energy dissipation chamber, continuously circulating and increasing leakage resistance.
[0036] More preferably, a second diverting tooth 10 is formed between the inlet of the first energy dissipation chamber 6 and the vortex groove 9. The second diverting tooth 10 is inclined toward one side of the vortex groove 9. Part of the high-pressure gas guided by the boss 3 is diverted by the second diverting tooth 10 and enters the vortex groove 9 and the first energy dissipation chamber 6 respectively. When the gas flow is diverted by the second diverting tooth, due to the angled design on the right side of the second diverting tooth, most of the airflow is guided into the first energy dissipation chamber, and a small part is diverted to the vortex groove. The gas flow entering the vortex groove forms a vortex, which merges with the airflow at the outlet of the first energy dissipation chamber, disturbing the local gas flow and increasing the energy dissipation effect.
[0037] The second diverting tooth separates the vortex groove from the first energy dissipation chamber, further increasing the different paths of the high-pressure gas. The gas flow in the vortex groove flows out after vortexing and merges with the gas flow radially towards the first energy dissipation chamber, forming obstruction and interference, further consuming energy and reducing the gas flow leakage speed.
[0038] In this embodiment, preferably, a second guide tooth 11 is provided at the inlet of the second energy dissipation chamber 7, and the distance between the second guide tooth 11 and the first diverting tooth 8 and the upper end face of the corresponding boss 3 is the same. When the steam flows towards the low-pressure end along the gap between the boss and the first diverting tooth, it is guided into the second energy dissipation chamber by the second guide tooth.
[0039] More preferably, a third guide tooth 12 is provided between the second guide tooth 11 and the first diverting tooth 8, and the third guide tooth 12 is 1.2-1.5 mm lower than the first diverting tooth 8. The third guide tooth 12 and the first diverting tooth 8 cooperate to form the outlet of the second energy dissipation chamber 7, and the third guide tooth 12 and the second guide tooth 11 cooperate to form the inlet of the second energy dissipation chamber 7. When the steam flows to the outlet of the second energy dissipation chamber, because the height of the third guide tooth is lower than that of the first diverting tooth, part of the steam flows out in advance, increasing the steam flow path, and the flow channel of this part of the steam becomes larger, which can reduce the flow velocity.
[0040] In this embodiment, the energy dissipation channel within the first energy dissipation chamber 6 is inverted U-shaped. An energy dissipation rib 13 protrudes from the bottom of the energy dissipation channel, and an energy dissipation groove 14 is provided on the inner wall of the energy dissipation channel corresponding to the energy dissipation rib 13. By combining the energy dissipation ribs and grooves within the U-shaped energy dissipation channel, the length and number of turns of the energy dissipation channel are increased, thereby increasing the number of collisions of the steam flow within the energy dissipation channel and improving the contact time between the steam flow and the energy dissipation channel, effectively consuming energy.
[0041] In this embodiment, preferably, the root of the third guide tooth 12 is formed with a turbulence step 15. The turbulence step creates energy dissipation channels of varying sizes within the second energy dissipation chamber, allowing the steam flow to pass through these channels multiple times, effectively dissipating energy.
[0042] In use, the high-pressure steam enters the steam seal section through the first guide tooth, and the main steam flow is guided by the front end face of the boss to turn radially outward. Under the action of the first diverter tooth, it is divided into two streams, one of which moves radially and the other flows along the gap between the boss and the first diverter tooth to the low-pressure end.
[0043] Guided by the second flow divider, a portion of the radially moving steam enters the first energy dissipation chamber and flows out from the back of the first guide tooth, merging with the main flow. The other portion enters the vortex groove, forming a vortex, and then flows out again, merging with the main flow.
[0044] The steam flow that flows towards the low-pressure end through the gap between the boss and the first diverter tooth enters the second energy dissipation chamber under the guidance of the second guide tooth, and then flows back to the back of the first diverter tooth, where it merges with the mainstream and continues to move towards the low-pressure end.
[0045] The above-described embodiments are preferred embodiments of the present utility model and are only used to facilitate the illustration of the present utility model. They are not intended to limit the present utility model in any way. Any person skilled in the art who makes partial modifications or alterations to the technical content disclosed in the present utility model without departing from the scope of the technical features of the present utility model shall still fall within the scope of the technical features of the present utility model.
Claims
1. A multi-path guided turbulence energy-saving steam seal body, wherein the inner end face is provided with a steam seal part (4) that corresponds one-to-one with the boss on the outer rotor; The steam seal part (4) includes a first guide tooth (5) opposite to the high-pressure gas. A first energy dissipation cavity (6) is provided on the inner end face of the steam seal body (1) between the first guide tooth (5) and the corresponding boss. A second energy dissipation cavity (7) is provided on the front side of the first energy dissipation cavity (6) along the steam flow direction. The front end face of the boss is opposite to the inlet of the first energy dissipation chamber (6); the inlet and outlet of the second energy dissipation chamber (7) are both located above the corresponding boss, and a first diverter tooth (8) is provided between the outlet of the second energy dissipation chamber (7) and the inlet of the first energy dissipation chamber (6); The high-pressure gas moving along the axial direction enters the steam seal section (4) through the first guide tooth (5), and is guided to turn radially outward at the front end face of the corresponding boss. Part of it enters the first energy dissipation chamber (6), and part of it enters the second energy dissipation chamber (7) after passing through the first diverting tooth (8).
2. A multi-path guided turbulence-reducing energy-saving steam seal, characterized in that, The gas seal body (1) includes the one described in claim 1.
3. The multi-path guided turbulence-reducing energy-saving steam seal according to claim 2, characterized in that, It also includes a rotor (2) that passes through the steam seal body (1), and a number of bosses (3) are distributed axially along the rotor (2).
4. The multi-path guided turbulence-reducing energy-saving steam seal according to claim 3, characterized in that, A vortex groove (9) is provided on the inner end face of the steam seal body (1) between the inlet and outlet of the first energy dissipation chamber (6). The high-pressure gas part guided by the boss (3) enters the vortex groove (9) to form a vortex.
5. The multi-path guided turbulence-reducing energy-saving steam seal according to claim 4, characterized in that, A second diverter tooth (10) is formed between the inlet of the first energy dissipation chamber (6) and the vortex groove (9). The second diverter tooth (10) is inclined toward the vortex groove (9). A portion of the high-pressure gas guided by the boss (3) is diverted by the second diverter tooth (10) and enters the vortex groove (9) and the first energy dissipation chamber (6) respectively.
6. The multi-path guided turbulence-reducing energy-saving steam seal according to claim 3, characterized in that, The second energy dissipation cavity (7) is provided with a second guide tooth (11) at the inlet. The second guide tooth (11) and the first diverting tooth (8) are spaced at the same distance from the upper surface of the corresponding boss (3).
7. The multi-path guided turbulence-reducing energy-saving steam seal according to claim 6, characterized in that, A third guide tooth (12) is provided between the second guide tooth (11) and the first diverter tooth (8), and the third guide tooth (12) is 1.2-1.5 mm lower than the first diverter tooth (8); The third guide tooth (12) and the first diverting tooth (8) work together to form the outlet of the second energy dissipation chamber (7), and the third guide tooth (12) and the second guide tooth (11) work together to form the inlet of the second energy dissipation chamber (7).
8. The multi-path guided turbulence-reducing energy-saving steam seal according to claim 2, characterized in that, The energy dissipation channel in the first energy dissipation chamber (6) is inverted U-shaped. An energy dissipation rib (13) is protruding at the bottom of the energy dissipation channel, and an energy dissipation groove (14) is provided on the inner wall of the energy dissipation channel corresponding to the energy dissipation rib (13).
9. A multi-path guided turbulence-reducing energy-saving steam seal according to claim 7, characterized in that, The root of the third guide tooth (12) is formed with a turbulence step (15).