End cover sealing structure of generator

Abstract

The utility model discloses a generator end cover sealing structure which comprises a framework and a sealing inner ring, an air injection nozzle is arranged on the surface of the framework, a split type shielding ring is arranged on the framework, an air cavity is arranged inside the sealing inner ring, a deformation ring groove is arranged on the inner surface of the sealing inner ring, and a dustproof inner ring is arranged on the inner surface, located on the deformation ring groove, of the sealing inner ring. An outer dustproof ring and a split extrusion ring are arranged on the surface of the framework, a limiting ring of an integrated structure is arranged on the extrusion ring, an extrusion ring is arranged on the outer dustproof ring, and a spring wire is arranged in the extrusion ring; the size of a gap between the adjacent combination surfaces of the sealing piece and the generator shaft is adjusted, the expanded sealing inner ring is in interference fit with the generator shaft, the gap between the sealing inner ring and the generator shaft is reduced, the extrusion ring extrudes the outer dustproof ring, and the situation that the gap between the adjacent combination surfaces of the outer dustproof ring and the generator shaft is enlarged due to outward expansion of the outer dustproof ring is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of generator sealing accessories, and in particular relates to a generator end cover sealing structure. Background Art

[0002] A generator is a mechanical device that converts mechanical energy into electrical energy. It is usually composed of a stator, a rotor, an end cover, and bearings. A seal is installed at the generator end cover to prevent fluid or solid particles from leaking from the adjacent joint surface between the end cover and the generator shaft, and to prevent external impurities such as dust and moisture from invading the generator.

[0003] A seal, also known as a sealing ring, is installed between the adjacent mating surfaces of the end cover and the generator shaft. During long-term use, the gap between the adjacent mating surfaces of the seal and the generator shaft becomes larger, leakage occurs, and external impurities such as dust and moisture invade the interior of the generator equipment. When the seal is in use, there is a design problem of not being able to adjust the size of the gap between the adjacent mating surfaces of the seal and the generator shaft. For this reason, the present application proposes a generator end cover sealing structure. Utility Model Content

[0004] The utility model aims to provide a generator end cover sealing structure to solve the problem in the above background technology that the size of the gap between the adjacent joint surfaces of the seal and the generator shaft cannot be adjusted.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a generator end cover sealing structure, comprising a skeleton and a sealing inner ring, the surface of the skeleton is provided with an air injection nozzle, the skeleton is provided with a split shielding ring, the interior of the sealing inner ring is provided with an air cavity, the inner surface of the sealing inner ring is provided with a deformation ring groove, the inner surface of the sealing inner ring located at the inner surface of the deformation ring groove is provided with a dustproof inner ring, the surface of the skeleton is provided with an outer dustproof ring and a split extrusion ring, the extrusion ring is provided with a limiting ring of an integral structure, the outer dustproof ring is provided with an extrusion ring, and the interior of the extrusion ring is provided with a spring wire.

[0006] Preferably, the inner diameter of the skeleton is the same as the inner diameter of the outer dustproof ring and the inner sealing ring, and the air injection nozzle is connected to the air cavity in the inner sealing ring.

[0007] Preferably, the cross section of the dustproof inner ring is an inclined shape, the sealing inner ring is equidistantly distributed in the deformation ring groove, and the inner diameter of the dustproof inner ring is the same as the inner diameter of the sealing inner ring.

[0008] Preferably, an annular filling groove is provided on the surface of the skeleton, and the shielding ring and the air injection nozzle are located in the filling groove.

[0009] Preferably, the skeleton is provided with limiting ring sheets on the surfaces opposite to each other in the filling groove.

[0010] Preferably, the outer surface of the outer dust ring is provided with a groove, and the extrusion ring is placed in the groove.

[0011] Preferably, a limiting ring groove is provided on the outer surface of the skeleton, the limiting ring cooperates with the limiting ring groove, the inner diameter of the extrusion ring is the same as the outer diameter of the extrusion ring, and a square groove is provided on the surface of the extrusion ring.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, there is a design for adjusting the size of the gap between the adjacent joint surfaces of the seal and the generator shaft. The expanded seal inner ring is interference fit with the generator shaft to reduce the gap between the seal inner ring and the generator shaft. The extrusion ring squeezes the outer dust ring to prevent the outer dust ring from expanding outward, which causes the gap between the adjacent joint surfaces of the outer dust ring and the generator shaft to become larger. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic cross-sectional structure diagram of the skeleton of the utility model;

[0016] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0017] In the figure: 1. skeleton; 2. shielding ring; 3. air injection nozzle; 4. extrusion ring; 5. outer dustproof ring; 6. sealing inner ring; 7. extrusion ring; 11. limiting ring piece; 12. limiting ring groove; 41. square groove; 42. limiting ring; 51. groove; 61. air cavity; 62. dustproof inner ring; 63. deformation ring groove; 71. spring wire. DETAILED DESCRIPTION

[0018] 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.

[0019] Example

[0020] See also Figures 1 to 3The utility model provides a technical solution: a generator end cover sealing structure, including a skeleton 1 and a sealing inner ring 6, a gas injection nozzle 3 is provided on the surface of the skeleton 1, the gas injection nozzle 3 penetrates the skeleton 1, a split shielding ring 2 is provided on the skeleton 1, the shielding ring 2 covers the gas injection nozzle 3 to prevent the gas injection nozzle 3 from being disturbed by the outside world, an air cavity 61 is provided inside the sealing inner ring 6, gas is filled into the air cavity 61 from the gas injection nozzle 3, so that the sealing inner ring 6 expands, so that the sealing inner ring 6 and the generator shaft have an interference fit, so as to avoid the gap between the adjacent joint surfaces of the sealing inner ring 6 and the generator shaft from becoming larger, resulting in leakage and external dust, impurities and moisture invading the inside of the generator, a deformation ring groove 63 is provided on the inner surface of the sealing inner ring 6, which is conducive to the expansion and deformation of the sealing inner ring 6, and a dustproof inner ring 62 is provided on the inner surface of the sealing inner ring 6 located at the deformation ring groove 63, The dustproof inner ring 62 is integrally formed with the sealing inner ring 6 by injection molding, and the overlapping dustproof inner ring 62 is fitted with the generator shaft. The dustproof inner ring 62 plays a dustproof role. The surface of the skeleton 1 is provided with an outer dustproof ring 5 and a split extrusion ring 4. The extrusion ring 4 is provided with a limiting ring 42 of an integrated structure. The extrusion ring 4 plays a role in extruding the outer dustproof ring 5 to prevent the outer dustproof ring 5 from expanding outward, resulting in an increase in the gap between the adjacent mating surfaces of the outer dustproof ring 5 and the generator shaft. The outer dustproof ring 5 is provided with an extrusion ring 7, and the interior of the extrusion ring 7 is provided with a spring wire 71. The extrusion ring 7 and the spring wire 71 play a role in extruding the outer dustproof ring 5. When the outer dustproof ring 5 is deformed and then acts on the extrusion ring 7 and the spring wire 71, the elastic extrusion ring 7 and the spring wire 71 exert a reaction force on the outer dustproof ring 5 to reduce the deformation degree of the outer dustproof ring 5.

[0021] In this embodiment, the inner diameter of the skeleton 1 is the same as the inner diameter of the outer dust ring 5 and the sealing inner ring 6. The gas injection nozzle 3 is connected to the air cavity 61 in the sealing inner ring 6. Gas is filled into the air cavity 61 from the gas injection nozzle 3 to expand the sealing inner ring 6. The sealing inner ring 6 is made to have an interference fit with the generator shaft to prevent the gap between the adjacent mating surfaces of the sealing inner ring 6 and the generator shaft from becoming larger, which would cause leakage and the intrusion of external dust, impurities and moisture into the interior of the generator.

[0022] In this embodiment, the cross-section of the dustproof inner ring 62 is an inclined shape, the sealing inner ring 6 is located in the deformation ring groove 63, and the dustproof inner ring 62 is evenly distributed. The inner diameter of the dustproof inner ring 62 is the same as the inner diameter of the sealing inner ring 6. The overlapping dustproof inner ring 62 fits the generator shaft, and the dustproof inner ring 62 plays a dustproof role.

[0023] In this embodiment, an annular filling groove is opened on the surface of the skeleton 1, and the shielding ring 2 and the gas injection nozzle 3 are located in the filling groove. The shielding ring 2 covers the gas injection nozzle 3 to prevent the gas injection nozzle 3 from being disturbed by the outside world. A limiting ring plate 11 is provided on the opposite surface of the skeleton 1 in the filling groove, and the limiting ring plate 11 limits the shielding ring 2.

[0024] In this embodiment, a groove 51 is provided on the outer surface of the outer dust ring 5, and the extrusion ring 7 is placed in the groove 51. A limiting ring groove 12 is provided on the outer surface of the skeleton 1, and the limiting ring 42 cooperates with the limiting ring groove 12. The inner diameter of the extrusion ring 4 is the same as the outer diameter of the extrusion ring 7. The limiting ring 42 is screwed together with the skeleton 1 by a thread. The extrusion ring 4 plays a role in squeezing the outer dust ring 5 to prevent the outer dust ring 5 from expanding outward, resulting in an increase in the gap between the adjacent mating surfaces of the outer dust ring 5 and the generator shaft. A square groove 41 is provided on the surface of the extrusion ring 4, and a wrench is inserted into the square groove 41 to facilitate the application of force to the extrusion ring 4 to rotate it.

[0025] The working principle and use process of this utility model:

[0026] When the generator end cover is sealed, there is a design for adjusting the size of the gap between the adjacent joint surfaces of the seal and the generator shaft. The skeleton 1 is installed between the adjacent joint surfaces of the generator end cover and the generator shaft. The skeleton 1, the sealing inner ring 6 and the outer dust ring 5 are combined with the generator shaft. Gas is filled into the air cavity 61 from the gas injection nozzle 3 to expand the sealing inner ring 6, so that the sealing inner ring 6 and the generator shaft have an interference fit, and the gap between the sealing inner ring 6 and the generator shaft is reduced to avoid the gap between the sealing inner ring 6 and the adjacent joint surfaces of the generator shaft from becoming larger, resulting in leakage and external dust, impurities and moisture invading the interior of the generator. The extrusion ring 4 plays a role in squeezing the outer dust ring 5 to prevent the outer dust ring 5 from expanding outward, resulting in the gap between the outer dust ring 5 and the adjacent joint surfaces of the generator shaft becoming larger.

[0027] Although the embodiments of the present invention have been shown and described (see the above detailed description for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A generator end cover sealing structure, comprising a frame (1) and a sealing inner ring (6), characterized in that: The surface of the skeleton (1) is provided with an air injection nozzle (3), the skeleton (1) is provided with a split shielding ring (2), the sealing inner ring (6) is provided with an air cavity (61) inside, the inner surface of the sealing inner ring (6) is provided with a deformation ring groove (63), the sealing inner ring (6) is provided with a dustproof inner ring (62) on the inner surface of the deformation ring groove (63), the surface of the skeleton (1) is provided with an outer dustproof ring (5) and a split extrusion ring (4), the extrusion ring (4) is provided with a limiting ring (42) of an integral structure, the outer dustproof ring (5) is provided with an extrusion ring (7), and the extrusion ring (7) is provided with a spring wire (71) inside.

2. A generator end cover sealing structure according to claim 1, characterized in that: The inner diameter of the skeleton (1) is the same as the inner diameters of the outer dustproof ring (5) and the sealing inner ring (6), and the air injection nozzle (3) is connected to the air cavity (61) in the sealing inner ring (6).

3. A generator end cover sealing structure according to claim 1, characterized in that: The cross section of the dustproof inner ring (62) is an inclined shape, the sealing inner ring (6) is located in the deformation ring groove (63), the dustproof inner ring (62) is evenly distributed, and the inner diameter of the dustproof inner ring (62) is the same as the inner diameter of the sealing inner ring (6).

4. A generator end cover sealing structure according to claim 1, characterized in that: An annular filling groove is provided on the surface of the skeleton (1), and the shielding ring (2) and the gas injection nozzle (3) are located in the filling groove.

5. A generator end cover sealing structure according to claim 4, characterized in that: The skeleton (1) is provided with limiting ring pieces (11) on opposite surfaces located in the filling groove.

6. A generator end cover sealing structure according to claim 1, characterized in that: The outer surface of the outer dustproof ring (5) is provided with a groove (51), and the extrusion ring (7) is placed in the groove (51).

7. A generator end cover sealing structure according to claim 1, characterized in that: The outer surface of the skeleton (1) is provided with a limiting ring groove (12), the limiting ring (42) cooperates with the limiting ring groove (12), the inner diameter of the extrusion ring (4) is the same as the outer diameter of the extrusion ring (7), and a square groove (41) is provided on the surface of the extrusion ring (4).

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