Structure for improving high-speed oil mist circulation of wind power gear box

Abstract

The utility model provides a structure for improving high-speed oil mist circulation of a wind power gear box, which is characterized in that a high-speed shaft of the wind power gear box penetrates through a through hole of a transparent cover, and the transparent cover is fixedly connected to a box body; the speed reducer is characterized in that an oil slinger is fixedly sleeved at the shaft neck of the high-speed shaft, and an oil retainer is sleeved between the oil slinger and the box body; the oil slinger divides the space between the transparent cover and the oil retainer into a first oil return cavity and a second oil return cavity which are communicated with each other; a high-pressure oil mist channel communicated with the first oil return cavity and the outer side of the transparent cover is formed in the transparent cover, a one-way valve located on the outer side of the transparent cover is arranged on the high-pressure oil mist channel in a screwed mode, and an air filter is installed on the one-way valve; an oil return pipeline connected with the first oil return cavity is arranged in the box body and the transparent cover. In the high-speed rotation process of the high-speed shaft of the gear box, high-pressure oil mist is prevented from seeping from the position of the high-speed shaft, and the oil leakage fault of the gear box is avoided.

Description

Technical Field

[0001] The utility model relates to the field of wind power gearboxes, and specifically to a structure for improving the oil mist circulation of the high-speed stage of a wind power gearbox. Background Technique

[0002] Judging from the installation time of wind power gearboxes in China, most gearboxes are about to enter or have already entered the stage of needing repair or maintenance. Regarding the problem of oil splashing from the high-speed shaft, it has always been a technical difficulty in the industry.

[0003] During the operation of the wind power gearbox, the high-speed shaft rotates at a high speed and the internal air pressure of the gearbox is high. In addition to liquid lubricating oil, there is also high-pressure oil mist. The current sealing structure cannot completely prevent the overflow of oil mist and needs to be further improved. Content of the Utility Model

[0004] The utility model provides a structure for improving the oil mist circulation of the high-speed stage of a wind power gearbox, aiming to solve the shortcomings of the prior art and avoid the leakage of high-pressure oil mist from the high-speed shaft position during the high-speed rotation of the high-speed shaft of the gearbox, resulting in oil leakage failure of the gearbox.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A structure for improving the oil mist circulation of the high-speed stage of a wind power gearbox, the high-speed shaft of the wind power gearbox passes through the through hole of the through cover, and the through cover is fixedly connected to the box body; it is characterized in that:

[0007] An oil slinger is fixedly sleeved on the journal of the high-speed shaft, and an oil baffle ring is sleeved between the oil slinger and the box body;

[0008] The oil slinger divides the space between the through cover and the oil baffle ring into a first oil return cavity and a second oil return cavity that are interconnected;

[0009] A high-pressure oil mist passage communicating the first oil return cavity and the outside of the through cover is opened on the through cover, a check valve is screwed on the high-pressure oil mist passage outside the through cover, and an air filter is installed on the check valve;

[0010] There is an oil return pipeline in the box body and the through cover that is connected to the first oil return cavity.

[0011] The oil slinger includes a main body fixedly sleeved on the journal of the high-speed shaft, an annular convex wall is provided on the main body, and an annular outer baffle ring extends axially outward at the outer end of the annular convex wall;

[0012] The inner side of the annular convex wall of the oil slinger, the oil baffle ring, and the through cover enclose the first oil return cavity, and the outer side of the annular convex wall of the oil slinger, the annular outer baffle ring of the oil slinger, and the through cover enclose the second oil return cavity.

[0013] The through cover is provided with a ring groove facing the second oil return cavity.

[0014] The main body of the oil slinger is interference-fitted at the journal of the high-speed shaft.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The structure is simple and practical; the sealing effect of the high-speed stage of the wind power gearbox is improved; the high-oil-pressure oil mist inside will flow from the one-way valve to the air filter outside the gearbox, and the air filter adsorbs the oil mist, avoiding a large amount of oil mist flowing directly to the outside of the gearbox. It can prevent the oil liquid / oil mist from leaking out from the high-speed shaft during the operation of the gearbox, and prevent the gearbox from having an oil leakage failure. Description of the Drawings

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 It is a cross-sectional view of the present utility model. Detailed Embodiments

[0019] In order to more clearly illustrate the technical solution of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other embodiments can be obtained based on these drawings without creative efforts. For the convenience of understanding the present utility model, the present utility model will be described in more detail below in conjunction with the drawings and specific embodiments.

[0020] It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "upper", "lower", "inner", "outer", "bottom", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] As Figure 1 shown:

[0022] The high-speed shaft 7 of the wind power gearbox passes through the through hole of the gland 2, and the gland 2 is fixedly connected to the housing 1.

[0023] An oil slinger 4 is press-fitted and sleeved on the journal of the high-speed shaft 2. The oil slinger 4 includes a main body 41 press-fitted and sleeved on the journal of the high-speed shaft 2. An annular convex ridge 42 is provided on the main body 41, and an annular outer retaining ring 43 extends axially outward at the outer end of the annular convex ridge 42.

[0024] An oil baffle ring 3 is sleeved between the oil slinger 4 and the housing 1.

[0025] The inner side of the annular convex ridge 42 of the oil slinger 4, the oil baffle ring 3, and the cover 2 enclose a first oil return cavity 234. The outer side of the annular convex ridge 42 of the oil slinger 4, the annular outer retaining ring 43 of the oil slinger 4, and the cover 2 enclose a second oil return cavity 24.

[0026] The cover 2 is provided with an annular groove 21 facing the second oil return cavity 24.

[0027] An oil return pipeline 6 connected to the first oil return cavity 234 is provided in the housing 1 and the cover 2.

[0028] A high-pressure oil mist passage 20 communicating the first oil return cavity 234 and the outside of the cover 2 is provided on the cover 2. A one-way valve 8 located outside the cover 2 is screwed on the high-pressure oil mist passage 20, and an air filter 9 is installed on the one-way valve 8.

[0029] Oil return principle:

[0030] The arrows in the figure represent the flow directions of lubricating oil and high-pressure oil mist.

[0031] Figure 1 On the left side is the inside of the housing 1. The lubricating oil is internal lubricating oil. Part of the lubricating oil and high-pressure oil mist overflow outward through the gap between the oil baffle ring 3 and the oil slinger 4 (including two gaps: gap A between the oil baffle ring 3 and the main body 41 of the oil slinger 4, and gap B between the outer end face of the oil baffle ring 3 and the annular convex ridge 42 of the oil slinger 4) and enter the first oil return cavity 234.

[0032] The oil slinger 4 and the journal of the high-speed shaft 7 are press-fitted. During operation, as the high-speed shaft 7 rotates, the purpose of oil slinging is achieved. Other components are connected to the housing 1 and are in a static state.

[0033] The oil return line E uses the principle of reverse oil slinging of the oil slinger to sling most of the lubricating oil in the first oil return cavity 234 in the opposite direction, splash onto the surface of the oil baffle ring 4, and finally flow along the surface of the oil baffle ring 4 to the oil return pipeline 6 provided on the cover 2 and return to the inside of the housing 1.

[0034] A small part of the lubricating oil and high-pressure oil mist that are not completely processed by the oil return line E enter the second oil return cavity 24 through the gap C between the outer ring surface of the annular outer retaining ring 43 of the oil baffle ring 4 and the cover 2.

[0035] The oil return line F distributes the lubricating oil and high-pressure oil mist in these second oil return cavities 24 to the oil return ring groove 21 in the through cover 2, and then flows along the oil return ring groove 21, the inner wall of the through cover 2, the gap C between the outer ring surface of the outer retaining ring 43 and the through cover 2, and the first oil return cavity 234 to the oil return pipeline 6 opened in the through cover 2, and returns to the inside of the box body 1.

[0036] The high-pressure oil mist in the first oil return cavity 234 overflows outward through the high-pressure oil mist passage 20, enters the air filter 9 after passing through the one-way valve 8 and is adsorbed. Since it is a one-way valve, the high-pressure oil mist cannot flow back.

[0037] The air filter 9 can be replaced regularly.

[0038] Based on the analysis of the possible causes of oil leakage, this patent innovatively designs a combined structure of a high-pressure oil mist passage, a one-way valve, and an air filter, and successfully solves the problem of oil slinging on the high-speed shaft of a batch of wind power gearboxes.

[0039] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A structure for improving high-speed oil mist circulation in a wind turbine gearbox, wherein the high-speed shaft of the wind turbine gearbox passes through a through hole of a transparent cover, and the transparent cover is fixedly connected to the box body; the characteristics are: An oil slinger is fixedly sleeved on the journal of the high-speed shaft, and an oil retaining ring is sleeved between the oil slinger and the housing; the oil slinger divides the space between the transparent cover and the oil retaining ring into a first oil return chamber and a second oil return chamber that are interconnected; a high-pressure oil mist channel that connects the first oil return chamber and the outside of the transparent cover is provided on the transparent cover, a one-way valve located on the outside of the transparent cover is screwed on the high-pressure oil mist channel, and an air filter is installed on the one-way valve; an oil return pipeline connected to the first oil return chamber is provided in the housing and the transparent cover.

2. A structure for improving high-speed oil mist circulation in a wind turbine gearbox according to claim 1, characterized in that: The oil slinger ring comprises a main body fixedly sleeved on the journal of the high-speed shaft, an annular protrusion is arranged on the main body, and an annular outer retaining ring is extended axially outward from the outer end of the annular protrusion; the inner side of the annular protrusion of the oil slinger ring, the oil retaining ring and the transparent cover form a first oil return chamber, and the outer side of the annular protrusion of the oil slinger ring, the annular outer retaining ring of the oil slinger ring and the transparent cover form a second oil return chamber.

3. A structure for improving high-speed oil mist circulation in a wind turbine gearbox according to claim 1, characterized in that: The transparent cover is provided with an annular groove facing the second oil return chamber.

4. A structure for improving high-speed oil mist circulation in a wind turbine gearbox as claimed in claim 1, characterized in that: The main body of the oil slinger is interference fit on the journal of the high-speed shaft.

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