Anti-splashing main shaft sealing water tank
By designing a split stainless steel baffle and bracket to form a circulating water tank at the turbine main shaft seal, the problems of water leakage, splashing, and jamming at the turbine main shaft seal were solved, achieving self-lubrication and anti-splashing effects, and improving the reliability and durability of the turbine.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN DATANGGUOJI LIXIANJIANG RIVER BASIN HYDROELECTRIC POWER
- Filing Date
- 2025-05-23
- Publication Date
- 2026-05-15
AI Technical Summary
The existing turbine main shaft seal suffers from severe water leakage and splashing during the start-up and shutdown of the turbine generator set, and is prone to blockage when the water quality is poor during the flood season. This leads to deformation and aging of the baffle, which cannot effectively prevent water leakage and splashing, affecting the lifespan and safety of the unit components.
A splash-proof spindle sealing water tank is designed, which consists of multiple split stainless steel baffles and baffle supports to form a circulating water tank, creating a self-lubricating structure that isolates water leakage and splashing and reduces dependence on external water supply.
It effectively prevents water leakage and splashing from the spindle seal, extends service life, reduces installation difficulty and cost, adapts to various working conditions, solves the problem of water leakage and self-lubrication, and protects unit components.
Smart Images
Figure CN224244989U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water sealing technology for turbine main shafts, specifically to a splash-proof turbine main shaft sealing baffle. Background Technology
[0002] The turbine main shaft seal is installed on the upper part of the turbine runner and below the water guide bearing. Its main function is to seal the water overflowing between the rotating parts of the turbine and the fixed parts of the top cover. It is an important water sealing device in the operation of the turbine and requires high reliability, the longest possible service life, and as simple a structure as possible.
[0003] The existing turbine main shaft seal has the following problems: (1) During the start-up and shutdown of the turbine generator set, when the unit speed does not reach the rated speed, the water pressure type end face main shaft seal leaks water and splashes a lot; (2) During the flood season, the water quality of the turbine generator set is generally poor and the silt content in the water is high, so the water pressure type end face main shaft seal often gets stuck; if the gap between the stuck seal and the wear-resistant plate is large, the main shaft seal leaks water and splashes a lot; (3) The existing baffle is prone to deformation, aging and cracking under the impact of water leakage, and cannot effectively block the main shaft seal from splashing water, which leads to severe scouring of the control ring, top cover and water turbine chamber pit wall and other mechanisms. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a splash-proof spindle sealing water tank, which is achieved through the following technical solution:
[0005] This utility model provides a splash-proof main shaft sealing water tank, including a baffle bracket, a main shaft sealing baffle, a pressure plate, a pressure plate fixing component, and a bracket fixing component; the number of main shaft sealing baffles is multiple; the multiple main shaft sealing baffles are fixed to the top of the baffle bracket by the pressure plate; the baffle bracket is installed on the side wall of the turbine top cover to support the main shaft sealing baffles, so that the multiple main shaft sealing baffles are arranged in a ring between the turbine top cover and the main shaft seal, thereby forming a circulating water tank.
[0006] The baffle bracket is fixedly installed on the side wall of the turbine top cover by bracket fasteners.
[0007] There are six spindle sealing baffles; the six spindle sealing baffles are separately installed on the baffle bracket.
[0008] The spindle sealing baffle is made of stainless steel.
[0009] The pressure plate is located above the spindle sealing baffle, and the pressure plate is fixedly connected to the spindle sealing baffle by several pressure plate fixing parts.
[0010] The installation height of the main shaft sealing baffle is higher than that of the main shaft seal; a gap is left between the main shaft sealing baffle and the turbine main shaft and the main shaft seal.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] By setting multiple main shaft sealing baffles, a circulating water tank is formed between the main shaft seal and the turbine top cover, which can prevent water leakage and splashing from the main shaft seal and is suitable for various working conditions. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the installation position of this utility model;
[0014] Figure 2 This is a schematic diagram of the main structure of this utility model;
[0015] Figure 3 This is a top view of the structure of this utility model.
[0016] The labels in the diagram represent the following: 1. Baffle bracket; 2. Main shaft sealing baffle; 3. Pressure plate; 4. Pressure plate fixing component; 5. Bracket fixing component; 6. Turbine main shaft; 7. Turbine top cover; 8. Main shaft seal. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] In a preferred embodiment:
[0019] This embodiment provides a splash-proof spindle sealing water tank, such as... Figure 1 , Figure 2 , Figure 3 As shown, the system includes a baffle bracket 1, a main shaft sealing baffle 2, a pressure plate 3, a pressure plate fixing component 4, and a bracket fixing component 5. There are multiple main shaft sealing baffles 2. These multiple main shaft sealing baffles 2 are fixed to the top of the baffle bracket 1 via the pressure plate 3. The baffle bracket 1 is installed on the side wall of the turbine top cover 7 to support the main shaft sealing baffles 2, so that multiple main shaft sealing baffles 2 are arranged in a ring between the turbine top cover 7 and the main shaft seal 8, thereby forming a circulating water tank.
[0020] In this embodiment, the baffle bracket 1 is fixedly installed on the side wall of the turbine top cover 7 by the bracket fixing member 5.
[0021] In this embodiment, the pressure plate 3 is located above the spindle sealing baffle 2, and the spindle sealing baffle 2 is fastened by several pressure plate fixing parts 4.
[0022] In this embodiment, there are six spindle sealing baffles 2; the six spindle sealing baffles 2 are installed sequentially in a six-lobed split manner.
[0023] In this embodiment, the main shaft sealing baffle is adapted to the rotating water guide oil basin structure unit; the main shaft sealing baffle is installed in six separate parts, which makes the structure more dynamic and adaptable. This separate design reduces the installation difficulty and labor cost. It is fixed by pressure plate positioning and plays a role in preventing splashing.
[0024] In this embodiment, the spindle sealing baffle 2 installed on the spindle sealing water tank is made of stainless steel to avoid excessive water splashing from the spindle seal 8 due to large gaps between the wear-resistant plates. Existing baffles are prone to deformation and aging under water impact, and cannot effectively prevent water splashing from the spindle seal 8. This also avoids the disadvantages of existing baffles being prone to corrosion and erosion in humid environments.
[0025] In this embodiment, a circulating water tank is formed between the spindle seal and the top cover; the circulating water tank can collect leaked water and form self-lubrication through water pressure, reducing dependence on external water supply, and can also prevent water from splashing from the spindle seal.
[0026] In this embodiment, a circulating water tank is formed between the main shaft seal and the top cover to solve the problem of sudden interruption of water supply to the main shaft seal. During the rotation of the unit, the leakage water forms a self-lubricating effect on the main shaft seal.
[0027] In this embodiment, the main shaft sealing baffle effectively isolates the control ring, top cover, and waterwheel chamber pit wall from water splashing.
[0028] How the example works:
[0029] 1. For example Figure 3 As shown, the spindle sealing baffle adopts a six-part split installation, and each segment module can be transported and installed separately. It is suitable for scenarios where the space of the spindle sealing water tank is limited. A pressure plate is installed on the spindle sealing baffle, and the spindle sealing baffle is then fastened by several pressure plate fixing parts.
[0030] 2. The main shaft sealing baffle is made of stainless steel to avoid excessive water splashing from the main shaft seal when the unit speed is below the rated speed. During the flood season, when the water quality of the hydro-generator unit is poor and the silt content in the water is high, the main shaft seal often gets stuck. If the gap between the main shaft seal and the wear-resistant plate is large after the main shaft seal gets stuck, the water splashing from the main shaft seal will be significant. Existing baffles are prone to deformation, aging and cracking under the impact of water leakage, and cannot effectively prevent water splashing from the main shaft seal.
[0031] This embodiment offers the following advantages:
[0032] (1) In this embodiment, the spindle sealing baffle is made of stainless steel and the structure is optimized, which solves the problems of easy deformation, aging and cracking of existing baffles. The spindle sealing baffle also serves to prevent water splashing.
[0033] (2) The spindle sealing baffle in this embodiment adopts a six-petal split installation, which is easier to transport.
[0034] (3) The main shaft sealing water tank in this embodiment can prevent splashing under various operating conditions of the unit.
[0035] (4) In this embodiment, the main shaft sealing baffle forms a circulating water tank between the main shaft seal and the top cover, which solves the problem of sudden interruption of water supply to the main shaft seal, and will use the leakage water to form self-lubrication of the main shaft seal during the rotation of the unit.
[0036] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope contemplated herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art do not depart from the spirit and scope of this utility model.
Claims
1. A splash-proof spindle sealing water tank, characterized in that: It includes a baffle bracket (1), a main shaft sealing baffle (2), a pressure plate (3), a pressure plate fixing component (4), and a bracket fixing component (5); the number of the main shaft sealing baffles (2) is multiple; the multiple main shaft sealing baffles (2) are installed and fixed on the top of the baffle bracket (1) by the pressure plate (3); the baffle bracket (1) is installed on the side wall of the turbine top cover (7) to support the main shaft sealing baffles (2), so that the multiple main shaft sealing baffles (2) are arranged in a ring between the turbine top cover (7) and the main shaft seal (8), thereby forming a circulating water tank.
2. The anti-splash spindle sealing water tank according to claim 1, characterized in that: The baffle bracket (1) is fixedly installed on the side wall of the turbine top cover (7) by the bracket fixing component (5).
3. The anti-splash spindle sealing water tank according to claim 1, characterized in that: There are six spindle sealing baffles (2); the six spindle sealing baffles (2) are installed separately on the baffle bracket (1).
4. The anti-splash spindle sealing water tank according to claim 1, characterized in that: The spindle sealing baffle (2) is made of stainless steel.
5. The anti-splash spindle sealing water tank according to claim 1, characterized in that: The pressure plate (3) is located above the spindle sealing baffle (2), and the pressure plate (3) is fixedly connected to the spindle sealing baffle (2) by a number of pressure plate fixing parts (4).
6. The anti-splash spindle sealing water tank according to claim 1, characterized in that: The installation height of the main shaft sealing baffle (2) is higher than that of the main shaft seal (8); there is a gap between the main shaft sealing baffle (2) and the turbine main shaft (6) and the main shaft seal (8).