Generator insulating end cap

Abstract

The utility model discloses a generator insulating end cover relates to generator end cap technical field, this generator insulating end cover, including end cap board, the center of end cap board inserts the bearing assembly, the outside of bearing assembly has the insulation assembly, the upper end of insulation assembly is provided with fixed bolt, and insulation assembly is fixed with end cap board through fixed bolt, and fixed bolt is provided with a plurality of, bearing assembly includes bearing seat, the outer wall of bearing seat is provided with the connecting ring seat, the lower surface of bearing seat is provided with lower boss, and the scheme has solved the existing double -fed generator bearing seat and end cap insulating adopt glass fiber winding layer or install insulation gasket, and the insulating effect is poor, and is influenced by weather, air humidity, environmental temperature and other factors is bigger, and the installation cooperation effect of insulating material is poor, is easy in the installation and use process cause breakage or displacement, further leads to the problem of poor insulating effect.

Description

Technical Field

[0001] This utility model relates to the field of generator end cover technology, specifically a generator insulating end cover. Background Technology

[0002] The generator insulating end cover is an important structure that protects critical components by blocking the current circuit. Its core technology lies in achieving electrical isolation through insulating materials and structural design.

[0003] For example, Chinese patent CN202127314U (An Insulating End Cover for a Wind Turbine Generator) includes an end cover seat. A rolling bearing is installed within the bearing housing of the end cover seat. Inner and outer bearing covers are respectively located at the inner and outer ends of the rolling bearing on the generator frame, and are fixed to the end cover seat by bolts and washers. An oil baffle is fitted into the inner hole of the outer bearing cover. An oil inlet and outlet pipe are provided on the outer bearing cover, forming a labyrinthine sealed oil passage between the outer bearing cover, the oil baffle, and the rolling bearing. An insulating sleeve is provided between the outer diameter of the rolling bearing and the inner wall of the bearing housing of the end cover seat, and the insulating sleeve is heat-fitted into the bearing housing using an interference fit. Insulating gaskets are provided between the two end faces of the rolling bearing and the contact surfaces of the inner and outer bearing covers. This utility model end cover is high-temperature resistant, anti-aging, corrosion resistant, and has good insulation performance, can withstand the effects of harsh outdoor environments, and reduces shaft current generation.

[0004] However, the existing insulation between the bearing housing and end cover of the doubly fed generator uses fiberglass wrapping or additional insulating gaskets, which has poor insulation effect and is greatly affected by factors such as weather, air humidity, and ambient temperature. The installation and fit of the insulation materials are also poor, which can easily cause damage or displacement during installation and use, further resulting in poor insulation effect. Therefore, it does not meet the current requirements. In response, we have proposed a generator insulating end cover. Utility Model Content

[0005] The purpose of this utility model is to provide an insulating end cover for a generator, in order to solve the problems mentioned in the background art, where the insulation between the bearing housing and the end cover of the existing doubly fed generator uses glass fiber wrapping or additional insulating gaskets, resulting in poor insulation performance. Furthermore, the insulation is greatly affected by factors such as weather, air humidity, and ambient temperature, and the installation and fit of the insulation materials are poor, making it easy to cause damage or displacement during installation and use, further leading to poor insulation performance.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an insulating end cover for a generator, comprising: an end cover plate, a bearing assembly inserted at the center of the end cover plate, an insulating assembly sleeved on the outside of the bearing assembly, a fixing bolt provided at the upper end of the insulating assembly, and the insulating assembly being fixed to the end cover plate by the fixing bolt, and multiple fixing bolts being provided.

[0007] Preferably, the bearing assembly includes a bearing housing, a connecting ring seat is provided on the outer wall of the bearing housing, a lower protrusion is provided on the lower surface of the bearing housing, and the bearing housing, the connecting ring seat and the lower protrusion are all integrally formed. A hollow cavity is provided at the center of the bearing housing, and the hollow cavity penetrates the bearing assembly.

[0008] Preferably, the bearing assembly further includes reinforcing ribs, and multiple reinforcing ribs are provided, and the multiple reinforcing ribs are equally distributed and welded to the outer wall of the lower protrusion. The surface of the reinforcing ribs near the connecting ring seat is provided with an inner notch.

[0009] Preferably, the insulating assembly includes an insulating ring body and a stabilizing ring seat, with the stabilizing ring seat located on the lower surface of the insulating ring body, and the insulating ring body and the stabilizing ring seat are integrally formed. The stabilizing ring seat is engaged between the end cover plate and the bearing seat, and the lower surface of the insulating ring body is in contact with the upper surface of the bearing seat.

[0010] Preferably, the upper surface of the insulating ring body is provided with a first bolt hole, the upper surface of the end cover plate near the stabilizing ring seat is provided with a second bolt hole, and one end of the fixing bolt passes through the first bolt hole and is threadedly connected to the second bolt hole.

[0011] Preferably, the upper surface of the end cover plate near the outer edge is provided with fixing holes, and the fixing holes penetrate the end cover plate, and multiple fixing holes are provided.

[0012] Preferably, both the insulating ring body and the stabilizing ring seat are made of SMC material.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model sets an insulating component between the end cover plate and the bearing assembly. When connecting, the stabilizing ring is stuck between the end cover plate and the bearing housing, and the first bolt hole and the second bolt hole are aligned. The end cover plate, the bearing assembly and the insulating component are interference fit and are fixed by heating, thereby initially realizing the connection between the end cover plate, the bearing assembly and the insulating component. The connection between the end cover plate and the bearing assembly is strengthened by fixing bolts. Compared with the traditional glass fiber winding for bearing housing insulation, the mechanical strength and insulation performance are better, and the installation fit effect is better. It solves the problem that the existing doubly fed generator bearing housing and end cover insulation uses glass fiber winding or adds insulating gaskets, which has poor insulation effect and is greatly affected by weather, air humidity, ambient temperature and other factors. The insulation material installation fit effect is poor, and it is easy to cause damage or displacement during installation and use, which further leads to poor insulation effect.

[0015] (2) By setting multiple equally spaced reinforcing ribs on the outer wall of the lower protrusion, after the end cover plate, bearing assembly and insulation assembly are connected, the lower surface of the end cover plate is in close contact with the reinforcing ribs, which improves the connection stability of the end cover plate and bearing assembly and makes it less likely to separate under force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall bottom view of the present invention;

[0018] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0019] Figure 4 This is a bottom view of the insulating component of this utility model;

[0020] In the diagram: 1. End cover plate; 2. Bearing assembly; 3. Insulation assembly; 4. Fixing bolt; 5. Fixing hole; 6. Lower protrusion; 7. Reinforcing rib; 8. Inner notch; 9. Hollow cavity; 10. Insulation ring body; 11. Stabilizing ring seat; 12. First bolt hole; 13. Second bolt hole; 14. Mounting opening; 15. Bearing seat; 16. Connecting ring seat. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figure 1-4This utility model provides an embodiment of a generator insulating end cover, comprising: an end cover plate 1, with fixing holes 5 on the upper surface near the outer edge of the end cover plate 1, the fixing holes 5 penetrating the end cover plate 1, and multiple fixing holes 5 are provided. Fasteners are connected to the fixing holes 5 to fix the end cover plate 1 to the generator. A bearing assembly 2 is inserted into the center of the end cover plate 1, and an insulating assembly 3 is sleeved on the outside of the bearing assembly 2. The bearing assembly 2 includes a bearing seat 15, a connecting ring seat 16 is provided on the outer wall of the bearing seat 15, and a lower protrusion 6 is provided on the lower surface of the bearing seat 15. The bearing seat 15, the connecting ring seat 16, and the lower protrusion 6 are all integrally formed. A hollow cavity 9 is provided in the center of the bearing seat 15, and the hollow cavity 9 penetrates the bearing assembly 2. The insulating assembly 3 includes an insulating ring body 10 and a stabilizing ring seat 11, and the stabilizing ring seat 11 is located at... The lower surface of the insulating ring body 10 is integrally formed with the stabilizing ring seat 11. The stabilizing ring seat 11 is locked between the end cover plate 1 and the bearing seat 15, and the lower surface of the insulating ring body 10 contacts the upper surface of the bearing seat 15. The first bolt hole 12 and the second bolt hole 13 are aligned. At this time, the lower surface of the insulating ring body 10 contacts the upper surface of the bearing seat 15 and the upper surface of the end cover plate 1. The end cover plate 1, the bearing assembly 2 and the insulating assembly 3 are interference fit and are fixed by heating, thereby initially realizing the connection of the end cover plate 1, the bearing assembly 2 and the insulating assembly 3. The radial thickness of the insulating tube is increased by the insulating assembly 3, which increases the creepage distance between the bearing seat 15 and the end cover plate 1, thereby improving the electrical performance of the generator insulating end cover.

[0023] like Figure 1 and Figure 3 As shown, the upper end of the insulating component 3 is provided with a fixing bolt 4, and the insulating component 3 is fixed to the end cover plate 1 by the fixing bolt 4. Multiple fixing bolts 4 are provided. The upper surface of the insulating ring body 10 is provided with a first bolt hole 12, and the upper surface of the end cover plate 1 near the stabilizing ring seat 11 is provided with a second bolt hole 13. One end of the fixing bolt 4 passes through the first bolt hole 12 and is threadedly connected to the second bolt hole 13. The bearing assembly 2 also includes reinforcing ribs 7, and multiple reinforcing ribs 7 are provided, and the multiple reinforcing ribs 7 are equidistantly distributed and welded. The reinforcing rib 7, attached to the outer wall of the lower protrusion 6, has an inner notch 8 on its surface near the connecting ring seat 16. The inner notch 8 prevents contact with the stabilizing ring seat 11, thus preventing interference with the installation of the stabilizing ring seat 11. After the end cover plate 1, bearing assembly 2, and insulation assembly 3 are connected, the connection between the end cover plate 1 and bearing assembly 2 is reinforced by fixing bolts 4. After the end cover plate 1 and bearing assembly 2 are connected, the lower surface of the end cover plate 1 is in close contact with the reinforcing rib 7. The reinforcing rib 7 improves the connection stability of the end cover plate 1 and bearing assembly 2, making it less prone to separation under force.

[0024] Furthermore, both the insulating ring body 10 and the stabilizing ring seat 11 are made of SMC material. SMC material has stable performance and is less affected by temperature and humidity, thereby improving the insulation effect of the generator bearing system and enhancing its safety and stability.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A generator insulating end cover, comprising an end cover plate (1), characterized in that: A bearing assembly (2) is inserted at the center of the end cover plate (1). An insulating assembly (3) is fitted on the outside of the bearing assembly (2). A fixing bolt (4) is provided at the upper end of the insulating assembly (3). The insulating assembly (3) is fixed to the end cover plate (1) by the fixing bolt (4). There are multiple fixing bolts (4).

2. The generator insulating end cover according to claim 1, characterized in that: The bearing assembly (2) includes a bearing housing (15), a connecting ring seat (16) is provided on the outer wall of the bearing housing (15), a lower protrusion seat (6) is provided on the lower surface of the bearing housing (15), and the bearing housing (15), the connecting ring seat (16) and the lower protrusion seat (6) are all integrally formed. A hollow cavity (9) is provided at the center of the bearing housing (15), and the hollow cavity (9) penetrates the bearing assembly (2).

3. The generator insulating end cover according to claim 2, characterized in that: The bearing assembly (2) also includes reinforcing ribs (7), and multiple reinforcing ribs (7) are provided. The multiple reinforcing ribs (7) are equally distributed and welded to the outer wall of the lower protrusion (6). The surface of the reinforcing ribs (7) near the connecting ring seat (16) is provided with an inner notch (8).

4. A generator insulating end cover according to claim 2, characterized in that: The insulating assembly (3) includes an insulating ring body (10) and a stabilizing ring seat (11), with the stabilizing ring seat (11) located on the lower surface of the insulating ring body (10), and the insulating ring body (10) and the stabilizing ring seat (11) are integrally formed. The stabilizing ring seat (11) is held between the end cover plate (1) and the bearing seat (15), and the lower surface of the insulating ring body (10) is in contact with the upper surface of the bearing seat (15).

5. A generator insulating end cover according to claim 4, characterized in that: The upper surface of the insulating ring body (10) is provided with a first bolt hole (12), and the upper surface of the end cover plate (1) near the stabilizing ring seat (11) is provided with a second bolt hole (13). One end of the fixing bolt (4) passes through the first bolt hole (12) and is threadedly connected to the second bolt hole (13).

6. A generator insulating end cover according to claim 1, characterized in that: The end cover plate (1) has a fixing hole (5) on its upper surface near the outer edge, and the fixing hole (5) penetrates the end cover plate (1), and there are multiple fixing holes (5).

7. A generator insulating end cover according to claim 4, characterized in that: Both the insulating ring (10) and the stabilizing ring (11) are made of SMC material.

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