Split type bearing oil groove sealing structure of hydro-generator

Abstract

The utility model discloses a hydro-generator split type bearing oil groove sealing structure which comprises an upper rack (5), an upper guide bearing is arranged in the upper rack (5), a thrust bearing is arranged on the outer side of the upper rack (5), the thrust bearing is arranged at the upper end of the upper guide bearing, a split type upper guide sealing cover (8) is arranged on the upper guide bearing, and the split type upper guide sealing cover (8) is arranged on the thrust bearing. Unified sealing of the upper guide bearing and the thrust bearing is achieved. The oil mist problem of the thrust bearing of a high-capacity and high-rotating-speed unit can be effectively solved, so that the high-rotating-speed water-turbine generator set is more convenient to install and safer and more reliable to operate, the problems of the oil mist and oil throwing of the bearing are effectively solved, and meanwhile, a guarantee is provided for environment-friendly and energy-saving operation of a power station.

Description

Technical Field

[0001] The utility model relates to the technical field of hydro-generators, in particular to a split bearing oil groove sealing structure of a hydro-generator. Background Art

[0002] As capacity and load increase with high-speed hydro-generator units, they often adopt a split-type structure with thrust bearings and upper guide bearings. In this structure, since the thrust bearing is located on top, each of the thrust bearing and upper guide bearing uses an oil tank. In high-speed units, the structural limitations of the split oil tanks make the upper thrust bearing oil tank inside the oil retaining pipe more prone to oil leakage.

[0003] The split bearing oil tank structure of high-speed hydro-turbine generators is prone to oil leakage. In particular, due to the compact structure of the upper thrust oil tank, the installation space below the inner oil retaining pipe is very limited. If a thrust bearing lower sealing cover is installed, the installation space is very difficult. Therefore, how to solve this problem is an urgent technical problem. Utility Model Content

[0004] The utility model aims to provide a split bearing oil groove sealing structure for a hydro-generator to solve the technical problem of oil leakage of the thrust bearing oil retaining pipe and the upper guide bearing.

[0005] The utility model is realized by adopting the following technical scheme: a split bearing oil groove sealing structure of a hydro-generator, comprising an upper frame, an upper guide bearing is arranged inside the upper frame, a thrust bearing is arranged on the outer side of the upper frame, the thrust bearing is arranged at the upper end of the upper guide bearing, and a petal-type upper guide sealing cover is arranged on the upper guide bearing to achieve unified sealing of the upper guide bearing and the thrust bearing.

[0006] Furthermore, the upper guide bearing includes an upper guide bearing, and an upper oil guide groove is provided on the upper guide bearing.

[0007] Furthermore, the thrust bearing includes a thrust bearing, and a thrust oil groove is provided on the thrust bearing.

[0008] Furthermore, a thrust oil retaining pipe is also provided on the thrust bearing.

[0009] Furthermore, a rotor and a stator are provided at the lower end of the upper frame, and the rotor and the stator are connected.

[0010] Furthermore, a plurality of oil retaining rings are provided on the split-type upper guide sealing cover.

[0011] Furthermore, the split-type upper guide sealing cover is composed of a plurality of sealing connectors, and the cross section of the sealing connector is L-shaped.

[0012] Furthermore, the sealing connectors are fixed by connecting bolts, and gaskets are also provided between the sealing connectors.

[0013] The beneficial effects of the present invention are:

[0014] The utility model arranges components such as a split-type upper guide sealing cover in the upper frame body to seal the thrust bearing and the upper guide bearing oil groove as a whole. At the same time, a sealing ring is arranged on the upper part of the frame, and is matched with an air sealing cover and a pipeline to achieve the purpose of solving the oil leakage of the thrust bearing oil retaining pipe and the upper guide bearing. By breaking the traditional design concept of a separate oil groove seal, the thrust bearing and the upper guide bearing are sealed in a unified manner. At the same time, the difficulty of small space and difficult processing of the lower part of the thrust bearing is overcome. The oil retaining ring and the split-type air sealing cover are arranged to effectively solve the problem of difficult installation. At the same time, due to the use of a relatively large sealing cover structure, the sealing effect is better.

[0015] The utility model can effectively solve the problem of oil mist in the thrust bearings of large-capacity, high-speed units, making high-speed hydro-generator units easier to install and safer and more reliable to operate, effectively solving the problems of bearing oil mist and oil throwing, and also providing guarantee for the environmentally friendly and energy-saving operation of the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of a high-speed hydro-generator set;

[0018] Figure 2 Schematic diagram of the bearing seal structure;

[0019] Figure 3 This is a schematic diagram of the structure of the split-flap upper guide sealing cover;

[0020] Figure 4 for Figure 3 AA cross-section of

[0021] Figure 5 for Figure 3 BB cross-section diagram;

[0022] Figure 6 for Figure 3 CC cross-section diagram;

[0023] Figure 7 for Figure 3DD profile;

[0024] In the figure, 1-rotor, 2-stator, 3-upper guide bearing, 4-thrust bearing, 5-upper frame, 6-thrust oil groove, 7-thrust oil retaining pipe, 8-petal-type upper guide sealing cover, 9-upper oil guide groove, 10-oil retaining ring, 11-sealing connector, 12-connecting bolt, 13-gasket. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0028] See also Figure 1 、 Figure 2 A split bearing oil groove sealing structure of a hydro-turbine generator includes an upper frame 5, an upper guide bearing is arranged inside the upper frame 5, a thrust bearing is arranged on the outside of the upper frame 5, and the thrust bearing is arranged at the upper end of the upper guide bearing. A split upper guide sealing cover 8 is provided on the upper guide bearing to achieve unified sealing of the upper guide bearing and the thrust bearing.

[0029] In this embodiment, the upper guide bearing includes an upper guide bearing 3, on which an upper oil guide groove 9 is provided; the thrust bearing includes a thrust bearing 4, on which a thrust oil groove 6 is provided; and the thrust bearing 4 is also provided with a thrust oil retaining pipe 7.

[0030] In this embodiment, a rotor 1 and a stator 2 are provided at the lower end of the upper frame 5 , and the rotor 1 and the stator 2 are connected.

[0031] Due to the increased capacity and load associated with high-speed hydro-turbine generator sets, a split-type structure with thrust bearings and upper guide bearings is often used. In this structure, since the thrust bearing is located on top, each has its own oil tank. In high-speed units, the structural limitations of the split oil tanks make the upper thrust bearing oil tank on the inside of the oil retaining tube more prone to oil leakage. Split-type bearing oil tank structures for high-speed hydro-turbine generators are prone to oil leakage, especially since the upper thrust oil tank is compact and the installation space below the inner oil retaining tube is relatively small. Installing a lower thrust bearing sealing cover would make installation space very difficult. Therefore, to address the issues of oil throw-off and oil mist on the inside of the thrust bearing, other novel structures need to be considered. Therefore, the utility model adopts a new design idea, and sets a new sealing cover (a petal-type upper guide sealing cover 8) and other components in the upper frame body to seal the thrust bearing and the upper guide bearing oil groove as a whole. At the same time, a sealing ring is set on the upper part of the frame, and an air seal cover and pipeline are provided to achieve the purpose of solving the oil leakage of the thrust bearing oil pipe and the upper guide bearing.

[0032] join Figures 3 to 7 The split-type upper guide sealing cover 8 is provided with a plurality of oil retaining rings 10. The split-type upper guide sealing cover 8 is composed of a plurality of sealing connectors 11. The cross-section of the sealing connectors 11 is L-shaped. Furthermore, the sealing connectors 11 are fixed to each other by connecting bolts 12, and gaskets 13 are also provided between the sealing connectors 11.

[0033] This new structure breaks away from the traditional design concept of separate oil tank seals and integrates the sealing of the thrust bearing and the upper guide bearing. This overcomes the difficulties of machining the lower portion of the thrust bearing, which is difficult due to its small space. The provision of an oil retaining ring and a split-flap gas seal cover effectively resolves the installation difficulties. Furthermore, the use of a relatively large seal cover structure (the split-flap upper guide seal cover 8) provides a better sealing effect. This new structure effectively resolves the oil mist problem in the thrust bearings of large-capacity, high-speed units, making high-speed hydro-generator units easier to install and safer and more reliable to operate. It effectively resolves the problems of bearing oil mist and oil shedding, and also ensures the environmentally friendly and energy-saving operation of the power station.

[0034] It should be noted that the terms "connected" and "set" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "connected" and "set" may explicitly or implicitly include one or more of the features. Moreover, the terms "connected", "set", etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. And for the aforementioned embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should know that this application is not limited to the order of the actions described, because according to this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions involved are not necessarily required by this application.

[0035] The above embodiments describe the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Without departing from the spirit and scope of the present invention, modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention should be within the scope of protection of the appended claims.

Claims

1. A split bearing oil groove sealing structure for a hydro-generator, characterized in that: The invention comprises an upper frame (5), wherein an upper guide bearing is arranged inside the upper frame (5), a thrust bearing is arranged outside the upper frame (5), the thrust bearing is arranged at the upper end of the upper guide bearing, and a petal-type upper guide sealing cover (8) is arranged on the upper guide bearing to achieve unified sealing of the upper guide bearing and the thrust bearing.

2. A split bearing oil groove sealing structure for a hydro-generator according to claim 1, characterized in that: The upper guide bearing comprises an upper guide bearing (3), and an upper oil guide groove (9) is provided on the upper guide bearing (3).

3. A split bearing oil groove sealing structure for a hydro-generator according to claim 2, characterized in that: The thrust bearing comprises a thrust bearing (4), and a thrust oil groove (6) is provided on the thrust bearing (4).

4. A split bearing oil groove sealing structure for a hydro-generator according to claim 3, characterized in that: The thrust bearing (4) is also provided with a thrust oil retaining pipe (7).

5. A split bearing oil groove sealing structure for a hydro-generator according to claim 4, characterized in that: A rotor (1) and a stator (2) are provided at the lower end of the upper frame (5), and the rotor (1) and the stator (2) are connected.

6. A split bearing oil groove sealing structure for a hydro-generator according to claim 5, characterized in that: A plurality of oil retaining rings (10) are provided on the split-flap upper guide sealing cover (8).

7. A split bearing oil groove sealing structure for a hydro-generator according to claim 6, characterized in that: The split-flap upper guide sealing cover (8) is composed of a plurality of sealing connectors (11), and the cross section of the sealing connectors (11) is L-shaped.

8. A split bearing oil groove sealing structure for a hydro-generator according to claim 7, characterized in that: The sealing connectors (11) are fixed to each other via connecting bolts (12), and gaskets (13) are also provided between the sealing connectors (11).

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