Split type bearing oil groove sealing structure of hydro-generator

Abstract

The invention 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 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 invention relates to the technical field of hydro-generators, and in particular to a split bearing oil groove sealing structure of a hydro-generator. Background Art

[0002] As the capacity and load of high-speed hydro-generator units increase, the thrust bearing and upper guide bearing split structure is often used. In this structure, since the thrust bearing is placed on top, the thrust bearing and the upper guide bearing each use an oil groove. In high-speed units, due to the structural limitations of the split oil groove, the upper thrust bearing oil groove is more likely to leak oil on the inner side of the oil retaining pipe.

[0003] The split bearing oil tank structure of high-speed hydro-turbine generators is prone to oil leakage, especially because the upper thrust oil tank has a compact structure and the installation space under the inner oil retaining pipe is small. If a thrust bearing lower sealing cover is installed, the installation space is very difficult. Therefore, how to solve this problem is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is 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 present invention is implemented by adopting the following technical scheme: a split bearing oil groove sealing structure of a hydro-turbine generator, comprising an upper frame, an upper guide bearing is arranged inside the upper frame, a thrust bearing is arranged outside the upper frame, the thrust bearing is arranged at the upper end of the upper guide bearing, and a split 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 comprises 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-flap upper guide sealing cover.

[0011] Furthermore, the split-flap 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 arranged between the sealing connectors.

[0013] The beneficial effects of the present invention are: The present invention arranges components such as a split-flap upper guide sealing cover in the upper frame body to seal the thrust bearing and the upper guide bearing oil groove as a whole, and at the same time arranges a sealing ring on the upper part of the frame, and is equipped 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 uniformly, and at the same time, the difficulty of small space at the lower part of the thrust bearing and difficult processing is overcome, and an oil retaining ring and a split-flap 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.

[0014] The present invention can effectively solve the oil mist problem of 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 power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0016] Figure 1 It is a structural schematic diagram of a high-speed hydro-generator set; Figure 2 is a schematic diagram of the bearing seal structure; Figure 3 It is a schematic diagram of the structure of the split-flap upper guide sealing cover; Figure 4 for Figure 3 AA section view; Figure 5 for Figure 3 BB cross-section diagram; Figure 6 for Figure 3 CC profile of ; Figure 7 for Figure 3 DD profile diagram; 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 bolts, 13-gasket. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] 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, further definition and explanation thereof is not required in subsequent drawings.

[0019] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0020] See also Figure 1 , Figure 2 A split bearing oil groove sealing structure of a hydro-turbine generator comprises an upper frame 5, 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 split 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.

[0021] In this embodiment, the upper guide bearing includes an upper guide bearing 3, on which an upper oil guide groove 9 is provided, and the thrust bearing includes a thrust bearing 4, on which a thrust oil groove 6 is provided, and on which a thrust oil retaining pipe 7 is also provided.

[0022] In this embodiment, a rotor 1 and a stator 2 are disposed at the lower end of the upper frame 5 , and the rotor 1 and the stator 2 are connected.

[0023] As the capacity and load of high-speed hydro-turbine generator sets increase, the thrust bearing and upper guide bearing split structure is often used. In this structure, since the thrust bearing is placed on top, an oil groove is used for each thrust bearing and upper guide bearing. In high-speed units, due to the structural limitations of the split oil groove, the upper thrust bearing oil groove is more prone to oil leakage on the inside of the oil retaining pipe. The split bearing oil groove structure of high-speed hydro-turbine generators is prone to oil leakage, especially because the upper thrust oil groove has a compact structure and the installation space at the bottom of the inner oil retaining pipe is small. If a thrust bearing lower sealing cover is set, the installation space is very difficult. Therefore, other new structures need to be considered to solve the problems of oil throwing and oil mist on the inside of the thrust bearing. Therefore, the present invention adopts a new design concept, and sets a new type of sealing cover (a split 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 retaining pipe and the upper guide bearing.

[0024] join Figures 3 to 7 The split upper guide sealing cover 8 is provided with a plurality of oil retaining rings 10, and the split 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. Further, the sealing connectors 11 are fixed by connecting bolts 12, and gaskets 13 are also provided between the sealing connectors 11.

[0025] In this new structure, by breaking the traditional design concept of separate oil tank seal, the thrust bearing and the upper guide bearing are sealed uniformly, and at the same time, the difficulty of small space under the thrust bearing and difficult processing is overcome, and the oil retaining ring and the split-flap gas sealing cover are set to effectively solve the problem of difficult installation. At the same time, due to the use of a relatively large sealing cover structure (split-flap upper guide sealing cover 8), the sealing effect is better. The present invention can effectively solve the oil mist problem of the thrust bearing of large-capacity and high-speed units, making the high-speed hydro-generator unit easier to install, safer and more reliable to operate, and effectively solve the problems of bearing oil mist and oil throwing, and will also provide protection for the environmental protection and energy-saving operation of the power station.

[0026] It should be noted that the terms "connection" and "setting" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "connection" and "setting" may explicitly or implicitly include one or more of the features. Moreover, the terms "connection", "setting" and the like 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 present invention described herein can be implemented in an order other than those illustrated or described herein. And for the aforementioned embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited to the described order of actions, because according to the present application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification belong to preferred embodiments, and the actions involved are not necessarily required by the present application.

[0027] The above embodiments describe the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the changes and modifications made by those skilled in the art shall be within the scope of protection of the appended claims of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A split bearing oil groove sealing structure for a hydro-turbine generator, characterized in that: The upper frame (5) comprises an upper guide bearing arranged inside the upper frame (5), a thrust bearing arranged outside the upper frame (5), the thrust bearing arranged at the upper end of the upper guide bearing, and a split-type upper guide sealing cover (8) 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-turbine generator as claimed in 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-turbine generator as claimed in 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 as claimed in 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-turbine generator as claimed in 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-turbine generator as claimed in claim 5, characterized in that: A plurality of oil retaining rings (10) are arranged on the split-flap upper guide sealing cover (8).

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

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

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