Water turbine sealing structure

Abstract

The utility model discloses a water turbine sealing structure, which belongs to the technical field of water turbines and comprises a mounting ring, the bottom of the mounting ring is welded on the top surface of a bottom plate, and adjusting holes are arranged on the periphery of the side wall of the mounting ring. The device further comprises an abutting assembly, the abutting assembly comprises an abutting plate, one side of the abutting plate abuts against the rotating shaft, the other side of the abutting plate is in rotating fit with an adjusting bolt, and the adjusting bolt is in threaded fit with the adjusting hole. A sealing sleeve is further included. The two semicircular sleeves are adopted to form the sealing sleeve, the sealing sleeve is simple in structure, convenient to use and practical, the sealing sleeve can be directly torn off and taken down during replacement, the two new semicircular sleeves are clamped to the surface of the rotating shaft, replacement can be directly conducted without disassembling the rotating shaft, the step of replacing the sealing sleeve is simplified, the replacement difficulty is reduced, and the replacement efficiency is improved. And the sealing sleeve can abut against the surface of the rotating shaft in cooperation with the abutting assembly and other structures, and therefore the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbines, in particular to a water turbine sealing structure. Background Art

[0002] A water turbine is a power machine that converts the energy of water flow into rotational mechanical energy. Water turbines and auxiliary machines are important hydropower equipment and an indispensable part of the hydropower industry. They are important equipment for making full use of clean and renewable energy to achieve energy conservation and emission reduction and reduce environmental pollution. Their technological development is in line with the development scale of my country's hydropower industry. Driven by the strong demand for electricity in my country, my country's water turbine and auxiliary machine manufacturing industry has entered a period of rapid development, and its economic scale and technological level have been significantly improved. my country's water turbine manufacturing technology has reached the world's advanced level. The principle of water turbine power generation is: water is led to the water turbine through a water pipe, which drives the water turbine runner to rotate. The water turbine drives the generator to generate electricity through the shaft. In order to prevent water from contacting the generator, a sealing structure must be set on the shaft.

[0003] After searching, in the prior art, Chinese patent announcement number: CN220749035U discloses a turbine main shaft sealing structure. The utility model includes a main shaft, a sealing sleeve, a sealing ring and a spring. The main shaft can be rotatably inserted into the sealing sleeve, and the sealing sleeve is fixedly installed on the turbine top cover; the spring is connected at both ends to form a ring and is sleeved on the sealing ring. The inner wall of the sealing sleeve is provided with a mounting groove, and the outer side of the sealing ring is embedded in the mounting groove. The inner side of the sealing ring can extend out of the mounting groove and closely adhere to the outer surface of the main shaft under the elastic action of the spring. The utility model uses the elastic action of the spring to make the sealing ring closely adhere to the outer surface of the turbine main shaft, reduce the gap between the turbine main shaft and the sealing sleeve, and the water at the water inlet end of the main shaft is not easy to leak to the far water end of the main shaft, and it is not easy to affect the normal operation of the generator.

[0004] But this device still has the following defects:

[0005] After the turbine is put into use, the two ends of the shaft are connected and fixed to the turbine and the generator respectively. When the sealing sleeve is aged and needs to be replaced, the operator needs to remove the shaft first, remove the aged sealing sleeve from one end of the shaft, and then insert the new sealing sleeve from one end of the shaft before replacing the sealing sleeve. This process is complicated and increases the difficulty of the operator's replacement work. The device does not solve this problem. Utility Model Content

[0006] The utility model aims to provide a water turbine sealing structure, which adopts two groups of semicircular sleeves to form a sealing sleeve, which can be directly broken apart and removed when replaced, and the two new groups of semicircular sleeves are mutually clamped on the surface of the rotating shaft, so that it can be directly replaced without disassembling the rotating shaft, which simplifies the steps of replacing the sealing sleeve and reduces the difficulty of replacement, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A water turbine sealing structure comprises a mounting ring, the bottom of the mounting ring is welded to the top surface of a bottom plate, and the side wall of the mounting ring is provided with adjustment holes around it;

[0009] It also includes a clamping assembly, the clamping assembly includes a clamping plate, one side of the clamping plate is in contact with the rotating shaft, the other side of the clamping plate is rotationally matched with the adjusting bolt, and the adjusting bolt is threadedly matched with the adjusting hole;

[0010] It also includes a sealing sleeve, which is slidably sleeved on the surface of the rotating shaft, and is arranged inside the mounting ring, and the sealing sleeve includes two groups of symmetrically arranged semicircular sleeves;

[0011] It also includes a top cover, which is threadedly connected to the top of the mounting ring and is slidably matched with the rotating shaft.

[0012] Preferably, two sides of the semicircular sleeve are integrally formed with a clamping portion, and the clamping portions of the two groups of the semicircular sleeves are clamped to each other.

[0013] Preferably, a first sealing ring is bonded to the bottom of the top cover by glue, and the bottom of the first sealing ring is in contact with the top surface of the mounting ring.

[0014] Preferably, a clamping ring is arranged on the inner side of the first sealing ring, the bottom surface of the clamping ring contacts the top surface of the sealing sleeve, and the clamping ring is fixedly connected to the top cover.

[0015] Preferably, two groups of handles are symmetrically arranged on the outer side wall of the top cover, and the handles are fixedly mounted on the outer side wall of the top cover.

[0016] Preferably, the bottom plate is slidably matched with the rotating shaft, mounting holes are provided around the bottom plate, and a second sealing ring is bonded to the bottom surface of the bottom plate by glue.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model adopts two groups of semicircular sleeves to form a sealing sleeve, which has a simple structure, is convenient and practical, can be directly broken apart and removed when replacing, and the two new groups of semicircular sleeves are clamped together on the surface of the rotating shaft, and can be directly replaced without disassembling the rotating shaft, thereby simplifying the steps of replacing the sealing sleeve and reducing the difficulty of replacement. When used in conjunction with structures such as a tightening component, the sealing sleeve can be pressed against the surface of the rotating shaft, thereby improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the explosion separation structure of the utility model;

[0021] Figure 3 Schematic diagram of the bottom structure of the base plate and top cover.

[0022] In the figure: 1. mounting ring; 2. bottom plate; 3. adjustment hole; 4. clamping plate; 5. rotating shaft; 6. adjusting bolt; 7. sealing sleeve; 701. semicircular sleeve; 702. clamping part; 8. top cover; 9. first sealing ring; 10. clamping ring; 11. handle; 12. mounting hole; 13. second sealing ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figures 1 to 3 , the utility model provides a technical solution:

[0025] A water turbine sealing structure includes a mounting ring 1, the bottom of which is welded to the top surface of a bottom plate 2, adjustment holes 3 are provided around the side walls of the mounting ring 1, the bottom plate 2 is slidably matched with a rotating shaft 5, mounting holes 12 are provided around the bottom plate 2, and a second sealing ring 13 is bonded to the bottom surface of the bottom plate 2 by glue. The mounting ring 1 can provide an installation position for other structures, and can be used in conjunction with the bottom plate 2 to fix the device. The second sealing ring 13 can reduce the amount of water entering the bottom of the bottom plate 2, thereby improving the sealing performance of the device.

[0026] It also includes a sealing sleeve 7, which is slidably sleeved on the surface of the rotating shaft 5. The sealing sleeve 7 is arranged inside the mounting ring 1. The sealing sleeve 7 includes two groups of symmetrically arranged semicircular sleeves 701. Both sides of the semicircular sleeves 701 are integrally formed with clamping parts 702. The clamping parts 702 of the two groups of semicircular sleeves 701 are clamped together. By arranging two groups of semicircular sleeves 701 for use with the clamping parts 702, the two groups of semicircular sleeves 701 can be directly separated and removed when replaced, and the two new groups of semicircular sleeves 701 can be clamped together on the surface of the rotating shaft 5. There is no need to disassemble the rotating shaft 5 and it can be directly replaced, which simplifies the steps of replacing the sealing sleeve 7 and reduces the difficulty of replacement.

[0027] It also includes a clamping assembly, which includes a clamping plate 4, one side of the clamping plate 4 is in contact with the rotating shaft 5, and the other side of the clamping plate 4 is rotationally matched with the adjusting bolt 6, and the adjusting bolt 6 is threadedly matched with the adjusting hole 3. By setting the clamping assembly, the sealing sleeve 7 can be pressed against the surface of the rotating shaft 5, thereby improving the sealing effect, and the sealing sleeve 7 can be loosened when replacing it, thereby facilitating the operator to replace the sealing sleeve 7.

[0028] It also includes a top cover 8, which is threadedly connected to the top of the mounting ring 1, and the top cover 8 is slidably matched with the rotating shaft 5. The bottom of the top cover 8 is bonded with a first sealing ring 9 by glue, and the bottom of the first sealing ring 9 is against the top surface of the mounting ring 1. By setting the first sealing ring 9, the sealing performance of the connection between the top cover 8 and the mounting ring 1 can be improved, and the sealing performance of the device is further improved; a clamping ring 10 is arranged on the inner side of the first sealing ring 9, and the bottom surface of the clamping ring 10 is against the top surface of the sealing sleeve 7. The clamping ring 10 is fixedly connected to the top cover 8. By setting the clamping ring 10, the top of the sealing sleeve 7 can be pressed when the top cover 8 is rotated downward for installation, so as to prevent the sealing sleeve 7 from accidentally moving, and at the same time, the sealing sleeve 7 is pressed, and used in conjunction with the clamping assembly, so as to further improve the sealing effect; two groups of handles 11 are symmetrically arranged on the outer wall of the top cover 8, and the handles 11 are fixedly installed on the outer wall of the top cover 8. By setting the handles 11, it is convenient for the operator to rotate and open the top cover 8, or rotate and fix it, so as to facilitate the replacement of the sealing sleeve 7.

[0029] When in use, move the device to the specified position, pass the rotating shaft 5 through the device, connect and fix the rotating shaft 5 with the external device, slide the device on the surface of the rotating shaft 5, move it to the specified position, fix the device through the bottom plate 2 and the mounting hole 12, and then use an external tool to turn the four groups of adjusting bolts 6 in the positive direction in sequence, so that the adjusting bolts 6 push the clamping plate 4 inward, the clamping plate 4 pushes the sealing sleeve 7, and the sealing sleeve 7 is tightly attached to the surface of the rotating shaft 5, and the installation is completed; when the sealing sleeve 7 needs to be replaced, turn the adjusting bolts 6 in the reverse direction, so that the adjusting bolts 6 drive the clamping plate 4 to move outward, the sealing sleeve 7 loses its clamping force, and is loosened from the surface of the rotating shaft 5. Rotate the handle 11 in the opposite direction to move the top cover 8 threadedly connected to the mounting ring 1 upward and open it, slide the sealing sleeve 7 upward, and pull the two sets of semicircular sleeves 701 so that the clamping parts 702 fall off each other, and the aged sealing sleeve 7 can be removed. Subsequently, move the two new sets of semicircular sleeves 701 between the top cover 8 and the mounting ring 1 and clamp them, so that the new sealing sleeve 7 is sleeved on the surface of the rotating shaft 5, slide the sealing sleeve 7 downward, and move it into the mounting ring 1, rotate the top cover 8 forward by the handle 11, tighten it to the top of the mounting ring 1, and turn the adjusting bolts 6 around forward in turn to fit the sealing sleeve 7 to the surface of the rotating shaft 5, and the replacement of the sealing sleeve 7 is completed.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water turbine sealing structure, characterized in that: It comprises a mounting ring (1), the bottom of the mounting ring (1) is welded to the top surface of the bottom plate (2), and the side wall of the mounting ring (1) is provided with adjustment holes (3) around it; It also includes a clamping assembly, the clamping assembly including a clamping plate (4), one side of the clamping plate (4) abuts against the rotating shaft (5), the other side of the clamping plate (4) is rotationally matched with an adjusting bolt (6), and the adjusting bolt (6) is threadedly matched with the adjusting hole (3); It also includes a sealing sleeve (7), the sealing sleeve (7) is slidably sleeved on the surface of the rotating shaft (5), the sealing sleeve (7) is arranged inside the mounting ring (1), and the sealing sleeve (7) includes two groups of symmetrically arranged semicircular sleeves (701); It also comprises a top cover (8), wherein the top cover (8) is threadedly connected to the top of the mounting ring (1), and the top cover (8) is slidably matched with the rotating shaft (5).

2. A water turbine sealing structure according to claim 1, characterized in that: The two sides of the semicircular sleeve (701) are integrally formed with clamping parts (702), and the clamping parts (702) of the two groups of semicircular sleeves (701) are clamped to each other.

3. A water turbine sealing structure according to claim 1, characterized in that: A first sealing ring (9) is bonded to the bottom of the top cover (8) by glue, and the bottom of the first sealing ring (9) contacts the top surface of the mounting ring (1).

4. A water turbine sealing structure according to claim 3, characterized in that: A clamping ring (10) is arranged on the inner side of the first sealing ring (9), the bottom surface of the clamping ring (10) contacts the top surface of the sealing sleeve (7), and the clamping ring (10) is fixedly connected to the top cover (8).

5. A water turbine sealing structure according to claim 4, characterized in that: Two groups of handles (11) are symmetrically arranged on the outer side wall of the top cover (8), and the handles (11) are fixedly mounted on the outer side wall of the top cover (8).

6. A water turbine sealing structure according to claim 1, characterized in that: The bottom plate (2) is slidably matched with the rotating shaft (5), the bottom plate (2) is provided with mounting holes (12) around it, and the bottom surface of the bottom plate (2) is bonded with a second sealing ring (13) by glue.

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