A water-blocking device for sealing the main shaft of a water turbine

Abstract

This utility model provides a water-blocking sealing device for the main shaft of a water turbine, belonging to the field of water turbine technology. It includes a fixed half-ring and a water-blocking groove disposed outside the fixed half-ring. The fixed half-ring is installed on the outside of the main shaft, and a limit ring is installed on the outside of the fixed half-ring. In this utility model, the fixed half-ring installed on the outside of the main shaft, in conjunction with the water-blocking groove, guides water leakage through a lower water channel on one side of the water-blocking groove, and moves it into the water-blocking groove for collection under gravity. This prevents water from flowing directly along the shaft to the device below the main shaft and causing damage, ensuring operational safety and improving operational stability. An absorbent sponge installed inside the fixed half-ring near the main shaft absorbs water leaking downwards through the lower water channel, and excess water flows into the water collection groove through the water collection hole and is then discharged through the water outlet groove. This provides multi-stage water blocking for the main shaft, preventing the failure of the first layer of water-blocking components from affecting the water-blocking effect.

Description

Technical Field

[0001] This utility model relates to the field of water turbine technology, and more specifically, to a water turbine main shaft sealing and water-blocking device. Background Technology

[0002] A water turbine is a power machine that converts the energy of water flow into rotational mechanical energy. It belongs to the category of turbine machinery in fluid machinery. As early as around 100 BC, China saw the emergence of the prototype of the water turbine – the waterwheel – used for irrigation and driving grain processing equipment. Modern water turbines are mostly installed in hydroelectric power stations to drive generators to generate electricity. In a hydroelectric power station, water from the upstream reservoir is drawn to the water turbine through a water intake pipe, which drives the water turbine runner to rotate and drives the generator to generate electricity.

[0003] In existing technology, during the operation of a water turbine, the runner's leak-proof ring will produce a small amount of leakage. This leakage can enter the device below along the gap between the main shaft and the fixed components, thus hindering the normal operation of other equipment. How to invent a water-blocking sealing device for the main shaft of a water turbine to solve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a water-blocking device for sealing the main shaft of a water turbine, which aims to solve the problem that a small amount of water leakage will occur in the runner sealing ring during the operation of the water turbine, which will hinder the normal operation of other equipment.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a water-blocking sealing device for the main shaft of a water turbine, including a fixed half-ring and a water-blocking groove disposed on the outside of the fixed half-ring. The fixed half-ring is installed on the outside of the main shaft of the water turbine, and a limit ring is installed on the outside of the fixed half-ring. A first sealing groove is opened on the side of the fixed half-ring close to the main shaft, and a first ear plate is installed at the lower end of the fixed half-ring.

[0007] The water-blocking groove is installed on the outside of the fixed semi-ring. A limit groove is opened on one side of the water-blocking groove, and a second sealing groove is opened on the side of the water-blocking groove near the main shaft.

[0008] Preferably, the fixing half-ring and the limiting ring are designed as a single unit, and bolts are installed between the two first ear plates, and the two fixing half-rings are fixed together by bolts.

[0009] Preferably, one side of one of the fixed half-rings is fitted with a plug, the outer side of the plug is fitted with a sealing gasket, and the outer wall of the plug is inserted into the inner wall of the other fixed half-ring.

[0010] Preferably, the inner wall of the limiting groove and the outer wall of the limiting ring are rotatably connected, an anti-slip pad is installed between the second sealing groove and the first sealing groove, the two outer walls of the anti-slip pad are fixedly connected to the outer wall of the turbine main shaft and the inner wall of the first sealing groove respectively, and the outer wall of the anti-slip pad and the inner wall of the second sealing groove are rotatably connected in a sealing manner.

[0011] Preferably, the two water-blocking grooves are fixed together by bolts inserted between the second ear plates, and a lower water trough is installed on the side of the water-blocking groove near the main shaft. The lower water trough is a frustum-shaped design.

[0012] By adopting the above technical solution, the fixed half ring and the water baffle are fixedly installed on the outside of the turbine main shaft with bolts. When water flows downward from the top of the main shaft along the outside, it flows into the surrounding water baffle for collection along the lower water trough, effectively preventing water from flowing along the shaft and causing damage to the device below.

[0013] Preferably, an installation groove is provided above the second sealing groove, a water collection groove is provided below the installation groove, a water outlet groove is provided at one end of the water collection groove, and an absorbent sponge is installed on the inner wall of the water collection groove.

[0014] Preferably, a plurality of equally spaced water collection holes are provided between the second sealing groove and the water collection groove, and a plurality of equally spaced water outlet holes are provided between the water collection groove and the water outlet groove.

[0015] Preferably, the water collection tank, water outlet tank, water collection hole, and water outlet hole are all designed to face downwards.

[0016] By adopting the above technical solution, in order to prevent some water from flowing into the device below through the gaps in the lower water tank, the water flowing through the lower water tank is absorbed by the water-absorbing sponge. At the same time, the water in the water-absorbing sponge and the installation tank flows into the surrounding water-blocking tank through the water outlet tank for collection, thereby further improving the water-blocking effect.

[0017] The beneficial effects of this utility model are:

[0018] The fixed semi-ring installed on the outside of the main shaft works in conjunction with the water-blocking groove. During the downward leakage of water, the lower water groove on one side of the water-blocking groove guides the water and moves it into the water-blocking groove for collection under the action of gravity. This prevents the water from flowing directly along the shaft to the device below the main shaft and causing damage, ensuring the safety and stability of the operation. The water-absorbing sponge installed inside the fixed semi-ring near the main shaft absorbs the water stains that continue to leak downward through the lower water groove. Excess water flows into the water collection groove through the water collection hole and is discharged through the water outlet groove. This provides multi-stage sealing and water blocking for the main shaft, preventing the failure of the first layer of water-blocking components from affecting the water blocking effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a water turbine main shaft sealing and water-blocking device provided by an embodiment of the present invention;

[0021] Figure 2 This is an exploded schematic diagram of the structure of a water turbine main shaft sealing and water-blocking device provided by an embodiment of this utility model;

[0022] Figure 3 This utility model provides a water-blocking sealing device for the main shaft of a water turbine. Figure 2 Enlarged view of the structure of region A in the middle;

[0023] Figure 4 This is a half-sectional view of the structure of a water turbine main shaft sealing and water-blocking device provided by an embodiment of this utility model;

[0024] Figure 5 This utility model provides a water-blocking sealing device for the main shaft of a water turbine. Figure 4 Enlarged view of the structure of region B in the middle.

[0025] In the diagram: 1. Fixed half ring; 2. Limiting ring; 3. First sealing groove; 4. First ear plate; 5. Sealing gasket; 6. Insert post; 7. Water-blocking groove; 8. Limiting groove; 9. Second sealing groove; 10. Installation groove; 11. Water collection groove; 12. Water outlet groove; 13. Water collection hole; 14. Water outlet hole; 15. Anti-slip pad; 16. Second ear plate; 17. Water drain groove; 18. Absorbent sponge. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] Example, refer to Figures 1-5A water-blocking sealing device for a turbine main shaft includes a fixed half-ring 1 and a water-blocking groove 7 disposed on the outside of the fixed half-ring 1. The fixed half-ring 1 is installed on the outside of the turbine main shaft. A limit ring 2 is installed on the outside of the fixed half-ring 1. A first sealing groove 3 is opened on the side of the fixed half-ring 1 close to the main shaft. A first ear plate 4 is installed at the lower end of the fixed half-ring 1.

[0028] The water-blocking groove 7 is installed on the outside of the fixed half-ring 1. A limit groove 8 is opened on one side of the water-blocking groove 7, and a second sealing groove 9 is opened on the side of the water-blocking groove 7 near the main shaft.

[0029] Furthermore, the fixed half-ring 1 and the limiting ring 2 are designed as a single unit. Bolts are installed between the two first ear plates 4. The two fixed half-rings 1 are fixed together by bolts. A plug 6 is installed on one side of one of the fixed half-rings 1. A sealing gasket 5 is fitted on the outer side of the plug 6. The outer wall of the plug 6 is inserted into the inner wall of the other fixed half-ring 1. The inner wall of the limiting groove 8 is rotatably connected to the outer wall of the limiting ring 2. An anti-slip pad 15 is installed between the second sealing groove 9 and the first sealing groove 3. The outer walls of the anti-slip pad 15 on both sides are fixedly connected to the outer wall of the turbine main shaft and the inner wall of the first sealing groove 3, respectively. The outer wall of the anti-slip pad 15 and the inner wall of the second sealing groove 9 are rotatably connected. The two water-blocking grooves 7 are fixed together by bolts inserted between the second ear plates 16. A lower water groove 17 is installed on the side of the water-blocking groove 7 near the main shaft. The lower water groove 17 is a frustum-shaped design.

[0030] It should be noted that: one of the fixed half-rings 1 and the water-retaining groove 7 are attached as a group to the outside of the turbine main shaft. Then, the insert 6 on one side of the fixed half-ring 1 in the other group is inserted to align the whole assembly. Then, the fixed half-rings 1 and the water-retaining groove 7 are installed and fixed in sequence with bolts. While the main shaft is working, the fixed half-rings 1 and the main shaft remain fixed. At the same time, the inner wall of the water-retaining groove 7 and the main shaft rotate. When water leaks down the outside from the top of the main shaft, the water flows down the slope of the lower water groove 17 and flows into the surrounding water-retaining groove 7 under the action of gravity for collection. This effectively avoids the water flowing directly along the shaft to the device below the main shaft and causing damage, ensuring the safety of the operation and improving the stability of the operation.

[0031] Furthermore, an installation groove 10 is provided above the second sealing groove 9, and a water collection groove 11 is provided below the installation groove 10. A water outlet groove 12 is provided at one end of the water collection groove 11. A water-absorbing sponge 18 is installed on the inner wall of the water collection groove 11. Several water collection holes 13 are provided between the second sealing groove 9 and the water collection groove 11. Several water outlet holes 14 are provided between the water collection groove 11 and the water outlet groove 12. The water collection groove 11, the water outlet groove 12, the water collection holes 13 and the water outlet holes 14 are all designed to be angled downwards.

[0032] It should be noted that while collecting leaked water through the water-blocking groove 7, to prevent some water from flowing into the device below through the gap between the lower water groove 17 and the main shaft, the water-absorbing sponge 18 absorbs the water stains in the gap. When the water-absorbing sponge 18 reaches its maximum load-bearing capacity, the water absorbed by the water-absorbing sponge 18 flows into the water outlet groove 12 through the mounting groove 10 and the water outlet hole 14 under the action of gravity, and enters the water-blocking groove 7 for collection. At the same time, when some water stains enter the second sealing groove 9 through the gap, the anti-slip pad 15 prevents the water stains from continuing to flow downward. Meanwhile, the excess water flows into the water collection groove 11 through the water collection hole 13 and is discharged through the water outlet groove 12. The main shaft is sealed and blocked in multiple stages to prevent the failure of the first layer of water-blocking components from affecting the water-blocking effect.

[0033] Working principle of a water-blocking sealing device for the main shaft of a water turbine:

[0034] One of the fixed half-rings 1 and the water-retaining groove 7 are attached as a group to the outside of the turbine main shaft. Then, the insert 6 on one side of the fixed half-ring 1 in the other group is inserted to align the whole assembly. Bolts are then used to install and fix the fixed half-rings 1 and the water-retaining grooves 7 in sequence. While the main shaft is operating, the fixed half-rings 1 and the main shaft remain fixed, while the inner wall of the water-retaining groove 7 and the main shaft rotate. When water leaks downwards from the top of the main shaft along the outside, the flowing water flows down the slope of the lower water-retaining groove 17 and into the surrounding water-retaining grooves 7 under gravity for collection. To prevent some water from flowing into the device below through the gap between the lower water-retaining groove 17 and the main shaft, water-absorbing sponges 18 are used to absorb the water stains in the gap. During adsorption, when the adsorption sponge 18 reaches its maximum load-bearing capacity, the water adsorbed by the sponge 18 flows into the water outlet 12 through the mounting groove 10 and the water outlet hole 14 under the action of gravity, and then enters the water blocking groove 7 for collection under the action of gravity. At the same time, when some water stains enter the second sealing groove 9 through the gaps, the anti-slip pad 15 prevents the water stains from continuing to flow downwards. Meanwhile, the water collection hole 13 flows the excess water into the water collection groove 11 and then discharges it through the water outlet 12. This multi-stage sealing and water blocking of the main shaft avoids the failure of the first layer of water blocking components, which would affect the water blocking effect. It effectively prevents water from flowing directly along the shaft to the device below the main shaft and causing damage, ensuring the safety of operation and improving the stability of operation.

[0035] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water-blocking device for sealing the main shaft of a water turbine, comprising a fixed half-ring (1) and a water-blocking groove (7) disposed on the outside of the fixed half-ring (1), characterized in that, The fixed half ring (1) is installed on the outside of the turbine main shaft. A limit ring (2) is installed on the outside of the fixed half ring (1). A first sealing groove (3) is opened on the side of the fixed half ring (1) near the main shaft. A first ear plate (4) is installed at the lower end of the fixed half ring (1). The water-blocking groove (7) is installed on the outside of the fixed half ring (1). A limiting groove (8) is opened on one side of the water-blocking groove (7). A second sealing groove (9) is opened on the side of the water-blocking groove (7) near the main shaft. The fixed half ring (1) and the limiting ring (2) are designed as a whole. Bolts are installed between the two first ear plates (4), and the two fixed half rings (1) are fixed together by bolts.

2. The turbine main shaft sealing and water-blocking device according to claim 1, characterized in that, One of the fixed half-rings (1) is equipped with a plug (6) on one side, and a sealing gasket (5) is fitted on the outer side of the plug (6). The outer wall of the plug (6) is inserted into the inner wall of the other fixed half-ring (1).

3. The turbine main shaft sealing and water-blocking device according to claim 2, characterized in that, The inner wall of the limiting groove (8) and the outer wall of the limiting ring (2) are rotatably connected. An anti-slip pad (15) is installed between the second sealing groove (9) and the first sealing groove (3). The outer walls on both sides of the anti-slip pad (15) are fixedly connected to the outer wall of the turbine main shaft and the inner wall of the first sealing groove (3), respectively. The outer wall of the anti-slip pad (15) and the inner wall of the second sealing groove (9) are rotatably connected.

4. The turbine main shaft sealing and water-blocking device according to claim 3, characterized in that, The two water-blocking grooves (7) are fixed together by bolts inserted between the second ear plates (16). A lower water groove (17) is installed on the side of the water-blocking groove (7) near the main shaft. The lower water groove (17) is a frustum-shaped design.

5. A water-blocking sealing device for a turbine main shaft according to claim 1, characterized in that, An installation groove (10) is provided above the second sealing groove (9), a water collection groove (11) is provided below the installation groove (10), a water outlet groove (12) is provided at one end of the water collection groove (11), and an absorbent sponge (18) is installed on the inner wall of the water collection groove (11).

6. A water-blocking sealing device for a turbine main shaft according to claim 5, characterized in that, A plurality of equally spaced water collection holes (13) are provided between the second sealing groove (9) and the water collection groove (11), and a plurality of equally spaced water outlet holes (14) are provided between the water collection groove (11) and the water outlet groove (12).

7. A water-blocking sealing device for a turbine main shaft according to claim 6, characterized in that, The water collection tank (11), water outlet tank (12), water collection hole (13) and water outlet hole (14) are all designed to be angled downwards.

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