A kind of GM fan motor bearing seat oil hole cover

Abstract

This application relates to a GM fan motor bearing housing oil filler cap, comprising a stepped cap body, an assembly section, and an exhaust section located above the assembly section. The assembly section has an annular sealing groove for inserting a sealing ring. The exhaust section has an exhaust structure, including an axial exhaust section and a radial exhaust section. The axial exhaust section extends upward through the assembly section to the upper part of the exhaust section. The radial exhaust section communicates with the top of the axial exhaust section and penetrates the side wall of the cap body to form an exhaust hole. The radial exhaust section is inclined, and its axis forms a 30° upward angle with the horizontal end face of the cap body. By adding an O-ring seal at the contact position between the cap body and the oil filler hole, an effective sealing structure is formed, eliminating the assembly gap between the two and blocking the path of lubricating oil leakage through the gap from the source. The exhaust hole angle is designed to be 30° upward from the horizontal, changing the exhaust direction and using physical angle to prevent lubricating oil from flowing out with the exhaust airflow, thus achieving both the exhaust function and the leak prevention requirement.

Description

Technical Field

[0001] This application relates to the field of wind turbine equipment technology, and in particular to a GM wind turbine motor bearing housing oil filling hole cover. Background Technology

[0002] The oil filler cap for the GM fan motor bearing housing is a key component ensuring bearing lubrication and stable equipment operation. Its main function is to seal the oil filler hole in the bearing housing while providing an venting channel within the housing. In existing technology, these oil filler caps are generally made of plastic, and their venting hole design has significant flaws: conventional venting holes are either vertically penetrating structures with the venting hole axis perpendicular to the cap body, or horizontally straight-through structures with the venting hole axis parallel to the cap body. While these two venting hole designs achieve basic venting functionality, they completely disregard the lubricating oil movement characteristics during equipment operation.

[0003] During the operation of the GM blower, the oil ring inside the bearing housing rotates at high speed with the bearing, continuously carrying up lubricating oil and forming an "oil mist" or "oil droplet splash" state. At the same time, the friction of the bearing generates heat, causing the air inside the cavity to expand and create a positive pressure environment. The positive pressure airflow carries some oil mist and oil droplets towards the exhaust port. Because the existing exhaust ports are designed to be vertical or horizontal straight-through, the lubricating oil carried by the airflow can flow directly out along the exhaust port channel. In vertical exhaust ports, the splashed oil droplets will overflow downwards / upwards due to the combined effect of gravity and airflow. In horizontal straight-through exhaust ports, the airflow can directly "push" the oil mist to the outside, ultimately causing the lubricating oil to leak out during the exhaust process.

[0004] In addition, plastic filler caps are prone to cracking and widening of the assembly gap between the cap and the filler hole due to temperature fluctuations, vibration and impact, and aging effects during long-term use. On the one hand, the lubricating oil carried by the oil ring in the bearing housing will leak through these gaps; on the other hand, the lubricating oil carried out by the vent will further aggravate the accumulation of oil stains in the gaps, accelerate the aging and damage of the plastic cap, and form a vicious cycle of "oil leakage-aging-more serious oil leakage".

[0005] This problem not only wastes lubricating oil and increases operating costs, but also causes oil contamination of the bearing housing and surrounding equipment, significantly increasing the workload of equipment cleaning and maintenance. More importantly, lubricating oil leakage may lead to insufficient lubrication inside the bearing housing, thereby affecting the normal operation of the bearing and posing a potential risk to the stable operation of the GM fan, and in severe cases, even causing equipment failure and shutdown. Utility Model Content

[0006] To solve or partially solve the problems existing in the related technologies, this application provides a GM fan motor bearing housing oil filling hole cover, which comprehensively improves the GM fan motor bearing housing oil filling hole cover to completely solve the oil leakage problem and ensure the long-term stable operation of the equipment.

[0007] This application provides a GM fan motor bearing housing oil filling hole cover, including: a stepped cover body, the cover body including an assembly part adapted to the GM fan motor bearing housing oil filling hole and an exhaust part disposed above the assembly part, the assembly part having an annular sealing groove and a sealing ring embedded in the annular sealing groove, the exhaust part having an exhaust structure, the exhaust structure including an axial exhaust section and a radial exhaust section, the axial exhaust section extending upward through the assembly part to the upper part of the exhaust part, one end of the radial exhaust section communicating with the top end of the axial exhaust section, and the other end penetrating through the side wall of the cover body to form an exhaust hole, the radial exhaust section being inclined and the axis forming a 30° upward angle with the horizontal end face of the cover body.

[0008] The diameter and length of the axial exhaust section are much larger than those of the radial exhaust section.

[0009] The sealing ring is an O-ring, with its outer diameter interfering with the diameter of the annular sealing groove and its inner diameter sealingly fitting the outer wall of the oil filling hole.

[0010] The connection between the axial exhaust section and the radial exhaust section is provided with a rounded transition structure.

[0011] The cover body is a one-piece carbon steel structure.

[0012] The technical solution provided in this application may include the following beneficial effects: This application provides a GM fan motor bearing housing oil filler cap. By adding an O-ring seal at the contact point between the cap and the oil filler hole, an effective sealing structure is formed, eliminating assembly gaps between the two and blocking the path of lubricating oil leakage through gaps at the source, significantly improving sealing reliability. The exhaust port angle is designed to be 30° upward from the horizontal. By changing the exhaust direction, the physical angle is used to prevent lubricating oil from flowing out with the exhaust airflow. This ensures normal exhaust inside the bearing housing while avoiding oil carryover in the exhaust, thus achieving both exhaust function and leak prevention. It avoids lubricating oil waste and prevents equipment from being contaminated by oil, significantly reducing the frequency and workload of equipment cleaning and maintenance, lowering labor and material costs, ensuring stable operation of the GM fan motor, and reducing the risk of failure due to insufficient lubrication.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0014] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0015] Figure 1 This is a schematic diagram of the structure of the device shown in the embodiments of this application; Figure 2 This is a top view of the device shown in the embodiments of this application; Figure label: In the figure, 1—assembly section, 2—exhaust section, 3—annular sealing groove, 4—sealing ring, 5—axial exhaust section, 6—radial exhaust section, 7—bearing housing oiling hole. Detailed Implementation

[0016] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0017] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0018] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0019] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0021] like Figure 1 , Figure 2 The GM fan motor bearing housing oil filling hole 7 cover shown includes: a cover body with a stepped structure, the cover body is made of carbon steel and is a one-piece carbon steel structure, which fundamentally solves the problem of easy aging and cracking of plastic covers and greatly improves the service life of components.

[0022] The cover body includes an assembly part 1 that mates with the oil filling hole 7 of the GM fan motor bearing housing and an exhaust part 2 located above the assembly part 1. The assembly part has an annular sealing groove 3, and a sealing ring 4 is embedded in the annular sealing groove 3. The sealing ring 4 is an O-ring 4. The outer diameter of the sealing ring 4 is interference-fitted with the groove diameter of the annular sealing groove 3, and the inner diameter is sealed and fitted to the outer wall of the oil filling hole. By adding the O-ring 4, the problem of oil leakage between the cover body and the oil filling hole is specifically solved, and the sealing performance is enhanced. The groove depth of the annular sealing ring 4 is 0.2-0.3mm smaller than the cross-sectional diameter of the O-ring 4, ensuring that the O-ring 4 is effectively pre-compressed after assembly, thereby improving the sealing reliability.

[0023] The exhaust section 2 is equipped with an exhaust structure, which includes an axial exhaust section 5 and a radial exhaust section 6. The axial exhaust section 5 extends upward through the assembly section 1 to the upper part of the exhaust section 2. One end of the radial exhaust section 6 is connected to the top of the axial exhaust section 5, and the other end passes through the side wall of the cover to form an exhaust hole. The radial exhaust section 6 is inclined and its axis forms a 30° upward angle with the horizontal end face of the cover. The connection between the axial exhaust section 5 and the radial exhaust section 6 is provided with a rounded transition structure to avoid lubricating oil retention caused by airflow impact. The inner walls of both the axial exhaust section and the radial exhaust section are polished to reduce surface roughness and reduce lubricating oil adhesion.

[0024] The diameter and length of the axial exhaust section are much larger than those of the radial exhaust section, achieving a balance between exhaust efficiency and sealing protection through expansion buffering and contraction flow guidance. During lubrication or operation within the bearing housing, compressed gas containing oil mist is generated. The large diameter of the axial exhaust section provides a buffer space for the gas, reducing airflow velocity and pressure impact, preventing high-pressure airflow from directly impacting the inner wall of the channel and causing oil mist splashing and adhesion. The large-diameter axial exhaust section extends the residence time of oil mist within the channel, allowing gravity to cause liquid oil droplets in the mist to settle and flow back to the bearing housing. The small-diameter radial venting section is only responsible for exhausting gas, achieving gas-oil separation and reducing lubricant waste and vent blockage. The small diameter of the radial venting section creates a guiding effect, allowing the buffered and settled gas to be discharged directionally and smoothly. Simultaneously, the 30° upward angle further prevents external dust from entering and internal oil mist from leaking out, balancing exhaust efficiency and sealing protection.

[0025] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0026] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0027] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A GM fan motor bearing housing oil filling hole cover, characterized in that, include: The cover body has a stepped structure. The cover body includes an assembly part adapted to the oiling hole of the bearing seat of the GM fan motor and an exhaust part disposed above the assembly part. The assembly part has an annular sealing groove and a sealing ring is embedded in the annular sealing groove. The exhaust part has an exhaust structure, which includes an axial exhaust section and a radial exhaust section. The axial exhaust section extends upward through the assembly part to the upper part of the exhaust part. One end of the radial exhaust section is connected to the top of the axial exhaust section, and the other end penetrates the side wall of the cover body to form an exhaust hole. The radial exhaust section is inclined and its axis forms a 30° upward angle with the horizontal end face of the cover body.

2. The oil filling hole cover for the GM fan motor bearing housing according to claim 1, characterized in that, The diameter and length of the axial exhaust section are much larger than the diameter and length of the radial exhaust section.

3. The GM fan motor bearing housing oil filling hole cover according to claim 1, characterized in that, The sealing ring is an O-ring, with its outer diameter interfering with the diameter of the annular sealing groove and its inner diameter sealingly fitting the outer wall of the oil filling hole.

4. The GM fan motor bearing housing oil filling hole cover according to claim 1, characterized in that, The connection between the axial exhaust section and the radial exhaust section is provided with a rounded corner transition structure.

5. The GM fan motor bearing housing oil filling hole cover according to claim 1, characterized in that, The cover body is a one-piece carbon steel structure.

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