Main bearing sealing device of a wind generator

Abstract

Main bearing sealing device of a wind generator, characterized in that it comprises a mounting shaft (1) and a rotating shaft (2) which are rotatably embedded; a sealing clamping plate (3) is further connected to an inner wall of the rotating shaft (2), which is located close to an outer wall of the mounting shaft (1), a gap (4) is formed between an inner wall of the mounting shaft (1) and an outer wall of the rotating shaft (2); a dust protection plate (5) is further provided on the sealing clamping plate (3) along an outer end face of the mounting shaft (1), a side wall of the sealing clamping plate (3) extends to the gap (4), is internally provided with an inner sealing ring (6), a leakage protection component is formed between an inner wall of the inner sealing ring (6) and the outer wall of the mounting shaft (1), and a sealing dust protection component is formed between the dust protection plate (5) and the outer end face of the mounting shaft (1).

Description

Technical field

[0001] The present utility model relates to the technical field of a key component of the wind generator, specifically a main bearing sealing device of a wind generator. State of the art

[0002] The wind generator is considered core equipment for clean energy, and its long-term stable operation places high demands on the reliability of the main bearing. The main bearing is a key component supporting the rotation of the generator's rotor and is typically subjected to high rotational speed (the rotational speed can reach hundreds of revolutions per minute), heavy loads (exposed to tens of tons of radial / axial force), and challenging environments (such as sand, dust, humidity, and large temperature variations).

[0003] The sealing device serves as a "protective shield" for the main bearing; currently, conventional sealing rings are used for protection, however, the reliability of the sealing rings is poor, resulting in an incomplete seal which, due to the simple seal, leads to a leakage of lubricating grease or the ingress of dust into the inner part, causing lubricating grease contamination and a reduction in performance. Content of the utility model | The problem to be solved

[0004] The technical problem to be solved with the present utility model is to eliminate the aforementioned technical deficiency, to provide a main bearing sealing device for a wind generator to facilitate assembly and use, and to ensure the sealing effect. II Technical Solution

[0005] To solve the aforementioned technical problem, the present utility model provides a technical solution: a main bearing sealing device for a wind generator, comprising a mounting shaft and a rotating shaft which are embedded for rotation; a sealing clamping plate is further connected to an inner wall of the rotating shaft, which is located close to an outer wall of the mounting shaft, and a gap is formed between an inner wall of the mounting shaft and an outer wall of the rotating shaft; a dust protection plate is further provided on the sealing clamping plate along an outer end face of the mounting shaft, a side wall of the sealing clamping plate extends to the gap, is internally provided with an inner sealing ring, a leakage protection component is formed between an inner wall of the inner sealing ring and the outer wall of the mounting shaft, and a sealing dust protection component is formed between the dust protection plate and the outer end face of the mounting shaft.

[0006] As an improvement, the sealing clamping plate and the inner wall of the rotating shaft are fastened by a screw; a damping intermediate layer is also filled between an inner wall of the sealing clamping plate and the inner wall of the rotating shaft.

[0007] As an improvement, a sealing washer is also inserted between an outer wall of the inner sealing ring and the inner wall of the rotating shaft.

[0008] As an improvement, both the damping intermediate layer and the sealing disc are made of a rubber material.

[0009] As an improvement, the leakage protection component includes two groups of L-shaped stop rings, the cross-section of which is L-shaped, two groups of L-shaped stop rings are installed, and some diagonally provided lip edges are connected to their outer wall.

[0010] As an improvement, the sealing dust protection component includes several dust protection rings, each connected to an inner wall of the dust protection plate and the outer end face of the mounting shaft; Some of the dust protection rings are offset from each other and their head parts are conical; a labyrinth dust protection structure is formed between the side walls of the head parts of the adjacent dust protection rings. III. Beneficial Effect

[0011] One advantage of the present utility model over the prior art is that, in the present application, the problem of grease leakage and dust ingress is solved simultaneously through a synergy effect of the leakage protection component and the sealing dust protection component; specifically, this is achieved through coordination with a non-contact labyrinth structure, which reduces friction and wear, ensures service life, and reduces maintenance costs in case of failure. Explanation of the illustrations Fig. shows a structural diagram of a main bearing sealing device of a wind generator. Fig. shows a structural diagram of an enlarged view of part A in Fig. As shown in the illustrations: (1) Mounting shaft; (2) Rotating shaft; (3) Sealing clamping plate; (4) Gap; (5) Dust protection plate; (6) Inner sealing ring; (7) Screw; (8) Damping intermediate layer; (9) Sealing washer; (10) L-shaped stop ring; (11) Lip edge; (12) Dust protection ring. Designs

[0012] The specific embodiments of the present utility model are explained in more detail below in conjunction with the illustrations. The same component with the same reference numeral is shown in between.

[0013] It should be noted that the words “in front”, “behind”, “left”, “right”, “above” and “below” used in the following description refer to the direction in the illustration, while the words “inside” and “outside” refer to the direction towards or away from the geometric center of the specific component.

[0014] It should be noted that if an element is described as being “permanently attached” to another element, it may be directly attached to another element or an intervening element; if an element is described as being “attached” to another element, it may be directly connected to another element or possibly an intervening element may be present at the same time; the terms “vertical”, “horizontal”, “left”, “right” and similar expressions used in the version are for descriptive purposes only.

[0015] Unless otherwise defined, all technical and scientific terms used in this version have the same meaning as the terms commonly understood by those skilled in the art in the relevant technical field of the present utility model; knowledge of the terms used in the description of the present utility model serves to illustrate specific embodiments rather than to limit the present utility model; the term "and / or" used in this version includes any and all combinations of one or more relevant listed elements.

[0016] In order to make the content of the present utility model easier and clearer to understand, the technical solution in the present utility model is described clearly and completely below in conjunction with the illustrations in the present utility model.

[0017] It is on the Fig.to be referred to, main bearing sealing device of a wind generator, comprising a mounting shaft (1) and a rotating shaft (2) which are embedded for rotation; a sealing clamping plate (3) is further connected to an inner wall of the rotating shaft (2), which is located close to an outer wall of the mounting shaft (1), a gap (4) is formed between an inner wall of the mounting shaft (1) and an outer wall of the rotating shaft (2); wherein a dust protection plate (5) is further provided on the sealing clamping plate (3) along an outer end face of the mounting shaft (1), a side wall of the sealing clamping plate (3) extends to the gap (4), is provided internally with an inner sealing ring (6), a leakage protection component is formed between an inner wall of the inner sealing ring (6) and the outer wall of the mounting shaft (1), and a sealing dust protection component is formed between the dust protection plate (5) and the outer end face of the mounting shaft (1).

[0018] In an actual application, the sealing clamping plate (3) and the inner wall of the rotating shaft (2) are fastened by a screw (7), a damping intermediate layer (8) is also filled between an inner wall of the sealing clamping plate (3) and the inner wall of the rotating shaft (2), while a sealing washer (9) is also filled between an outer wall of the inner sealing ring (6) and the inner wall of the rotating shaft (2).

[0019] In between, both the damping intermediate layer (8) and the sealing disc (9) are made of a rubber material.

[0020] In one example of this: The leakage protection component comprises two groups of L-shaped stop rings (10) whose cross-section is L-shaped, two groups of the L-shaped stop rings (10) are installed, and some obliquely provided lip edges (11) are connected to their outer wall, the sealing dust protection component comprises some dust protection rings (12) which are each connected to an inner wall of the dust protection plate (5) and the outer end face of the mounting shaft (1); Some of the dust protection rings (12) are offset from each other and their head parts are conical; a labyrinth dust protection structure is formed between the side walls of the head parts of the adjacent dust protection rings (12). Specifically, it reads:

[0021] For the leakage protection component between the inner wall of the inner sealing ring and the outer wall of the mounting shaft, a combined design of the L-shaped stop ring and the angled lip edge is used to block grease leakage through multiple curved channels; a sealing clamping plate is provided at a point on the inner wall of the rotating shaft close to an outer wall of the mounting shaft; an annular gap is formed between the mounting shaft and the rotating shaft; the sealing clamping plate extends from the inner sealing ring and the dust protection plate; the leakage protection component and the sealing dust protection component are each constructed separately; while for the sealing dust protection component between the dust protection plate and the outer end face of the mounting shaft, an offset, conical dust protection ring structure is used to prevent the ingress of dust through the dual action of the labyrinth effect and the fit of the conical surface; The sealing clamping plate and the rotating shaft are fastened by a screw, and a damping intermediate layer made of rubber is filled between them. A rubber sealing disc is provided between the outer wall of the inner sealing ring and the rotating shaft, which takes into account the damping of the vibration and the reinforcement of the seal.

[0022] The content not described in detail in the description belongs to the state of the art, which is known to the relevant person skilled in the field.

[0023] The standard parts used in the present utility model may have been purchased from the market; the parts in foreign shapes may have been ordered according to the description and illustrations; mature conventional methods such as screws, rivets, and welding are used for the specific joining methods of the individual parts in the prior art; conventional models in the prior art are used for machines, parts, and devices; conventional connection methods in the prior art are used for the circuit connection; no further details are described here; the content not described in detail in the description belongs to the prior art, which is known to the person skilled in the art in the field.

[0024] The present utility model and its embodiments are described above. This description is not limiting; the embodiment shown in the figures is merely one of the embodiments of the present utility model, and its practical structure is not limited to it. In summary, if a person skilled in the art in the field is prompted to develop similar designs and embodiments without inventive creation, without deviating from the purpose of the present utility model, they fall within the scope of protection of the present utility model.

Claims

[1] Main bearing sealing device of a wind generator, characterized by that it comprises a mounting shaft (1) and a rotating shaft (2) which are embedded for rotation; a sealing clamping plate (3) is further connected to an inner wall of the rotating shaft (2), which is located close to an outer wall of the mounting shaft (1), a gap (4) is formed between an inner wall of the mounting shaft (1) and an outer wall of the rotating shaft (2); a dust protection plate (5) is further provided on the sealing clamping plate (3) along an outer end face of the mounting shaft (1), a side wall of the sealing clamping plate (3) extends to the gap (4), is provided internally with an inner sealing ring (6), a leakage protection component is formed between an inner wall of the inner sealing ring (6) and the outer wall of the mounting shaft (1), and a sealing dust protection component is formed between the dust protection plate (5) and the outer end face of the mounting shaft (1). [2] Main bearing sealing device of a wind generator according to claim 1, characterized by , that the sealing clamping plate (3) and the inner wall of the rotating shaft (2) are fastened by a screw (7), and that a damping intermediate layer (8) is filled between an inner wall of the sealing clamping plate (3) and the inner wall of the rotating shaft (2). [3] Main bearing sealing device of a wind generator according to claim 2, characterized by , that a sealing washer (9) is also filled between an outer wall of the inner sealing ring (6) and the inner wall of the rotating shaft (2). [4] Main bearing sealing device of a wind generator according to claim 3, characterized by that both the damping intermediate layer (8) and the sealing disc (9) are made of a rubber material. [5] Main bearing sealing device of a wind generator according to claim 1 or 3, characterized by, that the leakage protection component comprises two groups of L-shaped stop rings (10) whose cross-section is L-shaped, two groups of the L-shaped stop rings (10) are installed, and some obliquely provided lip edges (11) are connected to the outer wall of which. [6] Main bearing sealing device of a wind generator according to claim 1 or 3, characterized by , that the sealing dust protection component comprises several dust protection rings (12) which are each connected to an inner wall of the dust protection plate (5) and the outer end face of the mounting shaft (1); some of the dust protection rings (12) are offset from each other and their head parts are conically shaped, forming a labyrinth dust protection structure between the side walls of the head parts of the adjacent dust protection rings (12).

Images