Oil distribution structure for wind power gear box
By adopting a combined structure of an oil separator ring and a steel sleeve in a wind turbine gearbox and utilizing the design of an oil storage cavity and an oil inlet hole, the problem of difficult oil separator ring clearance control is solved, stable supply and uniform distribution of lubricating oil are achieved, and the stability and reliability of the gearbox are improved.
Patent Information
- Application Number
- CN202423142150.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-12-17
AI Technical Summary
The existing wind turbine gearbox oil separator ring design has difficulty in controlling the clearance, which leads to lubricating oil leakage and wear, affecting the stability and reliability of the gearbox.
The oil separator ring and steel sleeve are combined to ensure that there is no leakage of lubricating oil. The interference fit between the cast nylon oil separator ring and the steel sleeve ensures uniform distribution and stable supply of lubricating oil.
It improves the sealing and uniformity of the lubricating oil, reduces the risk of wear, reduces maintenance costs, and improves the stability and reliability of the gearbox.
Smart Images
Figure CN223344649U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear box lubrication, in particular to an oil separation structure for a wind power gear box. Background Art
[0002] Good lubrication conditions within wind turbine gearboxes are crucial for ensuring stable and reliable operation of gears and bearings. Currently, oil separators are commonly used within gearboxes to convert static and dynamic oil paths. Large clearances in the oil separators can easily lead to pressure relief and oil leakage, while small clearances can easily scratch the copper sleeves. Furthermore, due to the high cost and wear of the copper sleeves themselves, frequent replacement increases maintenance costs and downtime. Therefore, controlling the clearance size of the oil separator rings has long been an industry challenge.
[0003] Currently, most gearbox oil separators are designed inside the gearbox. The actual radial clearance value is mainly controlled by dimensional tolerance and behavioral tolerance. Since the oil separator is located inside the gearbox, it is very difficult to actually measure its radial clearance value, and the accuracy of the clearance value cannot be ensured, resulting in difficulty in ensuring sufficient supply of lubricating oil, which in turn affects the lubrication effect of gears and bearings, increases the risk of wear, and reduces the stability and reliability of the gearbox. Utility Model Content
[0004] The utility model aims to provide an oil separation structure for a wind power gear box, so as to improve the sealing performance of the lubricating oil circuit inside the gear box.
[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an oil distribution structure for a wind power gearbox, comprising a housing and a planetary carrier, an oil inlet channel being provided on the housing, a planetary carrier oil circuit being provided on the planetary carrier, an oil distribution assembly being provided between the housing and the planetary carrier, the oil distribution assembly comprising an oil distribution ring and a steel sleeve, the oil distribution ring being located on the outside of the steel sleeve and its bottom being in contact with the steel sleeve, the oil distribution ring being sealed with the housing, the steel sleeve and the planetary carrier; an oil storage cavity being provided inside the oil distribution ring, and an oil inlet hole and an oil distribution ring groove being connected thereto are respectively provided on the upper and lower sides of the oil storage cavity, the oil inlet hole being connected to the oil inlet passage, a vertically penetrating oil distribution hole being provided on the steel sleeve, and the oil distribution ring groove being connected to the planetary carrier oil circuit through the oil distribution hole; the aperture of the oil inlet hole is larger than the oil distribution hole.
[0006] The principles and advantages of this solution are:
[0007] 1. In actual application, the lubricating oil enters the oil storage chamber inside the oil separator ring through the oil inlet channel, the oil inlet ring groove and the oil inlet hole. Since the aperture of the oil inlet hole is larger than the oil separator hole, the amount of oil in the oil storage chamber continues to increase and the oil storage chamber expands. Secondly, as the gearbox runs, the internal temperature rises, and the oil separator ring expands under the pressure of the oil storage chamber and the action of thermal expansion. The interference contact area between the oil separator ring and the steel sleeve continues to increase. Compared with the copper sleeve oil separator ring fixed by baking in the prior art, this solution more fully ensures that there is no radial gap between the oil separator ring and the planetary carrier during the operation of the gearbox, ensuring that the lubricating oil does not leak and the lubricating oil circuit system has sufficient pressure.
[0008] 2. The oil storage cavity allows the oil to be fully buffered and stabilized in the oil separator ring, reducing the fluctuation of the oil during transmission and further ensuring the uniformity and stability of lubrication.
[0009] 3. The oil inlet hole has a larger diameter than the oil distribution hole, which helps to reduce the pressure loss of the oil at the oil inlet hole, allowing the oil to enter the oil storage cavity more smoothly. The smaller diameter of the oil distribution hole can control the flow rate of the oil and make it evenly distributed in the oil distribution ring groove, thereby improving lubrication efficiency.
[0010] Furthermore, an oil inlet ring groove is opened on the box body, which is connected to the bottom of the oil inlet channel and the oil inlet hole of the oil separator ring, and the groove width of the oil inlet ring groove is larger than the aperture of the oil inlet channel and the oil inlet hole.
[0011] Furthermore, in a natural state, the bottom of the oil separator ring is arc-shaped, and the arc-shaped bottom is in compression contact with the top surface of the steel sleeve.
[0012] Furthermore, both sides of the bottom of the oil storage chamber are symmetrical arc structures.
[0013] Furthermore, the oil separator ring is made of cast nylon.
[0014] Furthermore, an inner step is provided inside the box body, the upper part of the oil separator ring is located inside the inner step, and a fastening screw is provided between the oil separator ring and the box body.
[0015] Furthermore, the planetary carrier is provided with a step groove for accommodating the steel sleeve, and fastening screws are provided between the planetary carrier and the steel sleeve.
[0016] Furthermore, a bearing is provided between the planet carrier and the housing. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model. DETAILED DESCRIPTION
[0018] The following is further described in detail through specific implementation methods:
[0019] The figure marks in the drawings of the specification include: housing 1, planetary carrier 2, bearing 3, oil inlet passage 4, oil inlet ring groove 5, oil distributor ring 6, oil inlet hole 61, oil storage chamber 62, oil distributor ring groove 63, steel sleeve 7, oil distributor hole 71, planetary carrier oil passage 8, and fastening screw 9.
[0020] The embodiment is basically as shown in the attached Figure 1 As shown: an oil distribution structure for a wind power gearbox, including a box body 1 and a planetary carrier 2, an oil inlet passage 4 is provided on the box body 1, a planetary carrier oil passage 8 is provided on the planetary carrier 2, and a bearing 3 is provided between the planetary carrier 2 and the box body 1; an oil distribution assembly is provided between the box body 1 and the planetary carrier 2, and the oil distribution assembly includes an oil distribution ring 6 and a steel sleeve 7, the oil distribution ring 6 is located outside the steel sleeve 7 and the two are in contact, an inner step is provided inside the box body 1, the upper part of the oil distribution ring 6 is located inside the inner step, and a fastening screw 9 is provided between the oil distribution ring 6 and the box body 1, the planetary carrier 2 A step groove is provided on it for accommodating the steel sleeve 7, and the steel sleeve 7 is sleeved on the planetary carrier 2. A fastening screw 9 is provided between the planetary carrier 2 and the steel sleeve 7. The oil separator 6 and the box body 1, the steel sleeve 7 and the planetary carrier 2 are sealed together, and the stepped cooperation between the various components effectively prevents the overflow of lubricating oil; compared with the baking process in the prior art, the fastening screw 9 enables stable mechanical fixation between the various components, and the fastening screw 9 limits the position when the oil separator 6 expands to prevent displacement due to expansion, thereby improving the structural stability.
[0021] An oil storage chamber 62 is provided inside the oil dividing ring 6, and an oil inlet hole 61 and an oil dividing ring groove 63 connected thereto are respectively provided on the upper and lower sides of the oil storage chamber 62. The oil inlet hole 61 is connected to the oil inlet passage 4, and a vertically penetrating oil dividing hole 71 is provided on the steel sleeve 7. The oil dividing ring groove 63 is connected to the planetary carrier oil passage 8 through the oil dividing hole 71. The aperture of the oil inlet hole 61 is larger than that of the oil dividing hole 71 to reduce the pressure loss of the oil at the oil inlet hole 61, so that the oil can enter the oil storage chamber 62 more smoothly, and the smaller aperture of the oil dividing hole 71 can control the flow rate of the oil, so that it is evenly distributed in the oil dividing ring groove 63, thereby improving the lubrication efficiency. An oil inlet ring groove 5 is opened on the housing 1, and the oil inlet ring groove 5 is connected with the bottom of the oil inlet channel 4 and the oil inlet hole 61 of the oil separator 6, and the groove width of the oil inlet ring groove 5 is larger than the aperture of the oil inlet channel 4 and the oil inlet hole 61. The oil inlet ring groove 5 and the oil separator ring groove 63 play a buffering and oil pre-storage role, preventing the lubricating oil from directly impacting the oil inlet hole 61 and the oil separator hole 71, affecting the smooth flow of the oil circuit.
[0022] Through the above-mentioned arrangement, the lubricating oil enters the oil storage chamber 62 inside the oil separator 6 through the oil inlet channel 4, the oil inlet ring groove 5 and the oil inlet hole 61. Since the aperture of the oil inlet hole 61 is larger than the oil separator hole 71, the amount of oil in the oil storage chamber 62 continues to increase, and the oil storage chamber 62 expands. Secondly, as the gearbox operates, the internal temperature rises, and the oil separator 6 expands under the pressure of the oil storage chamber 62 and the action of thermal expansion. The interference contact area between the oil separator 6 and the steel sleeve 7 continues to increase. Compared with the copper sleeve oil separator 6 fixed by baking in the prior art, this solution more fully ensures that there is no radial gap between the oil separator 6 and the planetary carrier 2 during the operation of the gearbox, ensuring that the lubricating oil does not leak and that the lubricating oil circuit system has sufficient pressure. At the same time, the existence of the oil storage chamber 62 also allows the oil to be fully buffered and stabilized in the oil separator 6, reducing the fluctuation of the oil during transmission and further ensuring the uniformity and stability of lubrication.
[0023] Preferably, in the natural state, the bottom of the oil dividing ring 6 is arc-shaped, and the arc-shaped bottom of the oil dividing ring 6 is in squeeze contact with the top surface of the steel sleeve 7. Because during the initial operation, the internal temperature of the gear box has not yet risen, the squeeze contact between the oil dividing ring 6 and the steel sleeve 7 ensures the sealing between the two and realizes oil sealing; as the working time increases, the oil dividing ring 6 expands under the action of the internal oil pressure and the increase of the external temperature, and the bottom of the oil dividing ring 6 gradually extends into a flat shape and is in complete contact with the top surface of the steel sleeve 7, fully ensuring the oil sealing effect and the lubrication performance.
[0024] Preferably, the two sides of the bottom of the oil storage chamber 62 are symmetrical arc structures. The arc structure allows the lubricating oil to act on a larger area of the oil separator ring 6 and the oil separator ring 6 is pressurized more evenly, ensuring that the oil separator ring 6 is fully extended and the contact area between the steel sleeve 7 gradually increases during the working process, thereby ensuring the sealing of the lubricating oil circuit.
[0025] Preferably, the oil separator 6 is made of cast nylon with a high expansion coefficient of about 9×10 -5 / ℃, and has long-term oil resistance, can achieve self-lubrication, and also has the advantages of impact resistance, vibration resistance, noiselessness, and no damage to the dual. Moreover, during actual operation, the steel sleeve 7 rotates with the planetary carrier 2, and the oil separator 6 is fixed to the housing 1, that is, the oil separator 6 and the steel sleeve 7 rotate relative to each other, and there is rotational friction. The cast nylon material has an extremely low wear factor and low friction coefficient, and the actual friction loss is almost zero, which effectively ensures the interference contact between the oil separator 6 and the steel sleeve 7 and ensures the sealing of the lubricating oil circuit. On the other hand, the cast nylon material is lower in cost than the copper sleeve oil separator 6, and because the cast nylon material has excellent ductility, the shape and specifications of the oil separator 6 can be customized according to actual needs, reducing the difficulty of purchasing finished products.
[0026] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. An oil distribution structure for a wind turbine gearbox, comprising a box body and a planetary carrier, wherein the box body is provided with an oil inlet channel and the planetary carrier is provided with a planetary carrier oil circuit, characterized in that: An oil separation assembly is provided between the housing and the planetary carrier, and the oil separation assembly includes an oil separation ring and a steel sleeve. The oil separation ring is located on the outside of the steel sleeve and its bottom is in contact with the steel sleeve. The oil separation ring and the housing, the steel sleeve and the planetary carrier are sealed together; an oil storage chamber is provided inside the oil separation ring, and an oil inlet hole and an oil separation ring groove connected to the oil storage chamber are respectively provided on the upper and lower sides of the oil storage chamber, the oil inlet hole is connected to the oil inlet passage, a vertically penetrating oil separation hole is provided on the steel sleeve, and the oil separation ring groove is connected to the planetary carrier oil circuit through the oil separation hole; the aperture of the oil inlet hole is larger than the oil separation hole.
2. The oil separation structure for a wind turbine gearbox according to claim 1, characterized in that: The box body is provided with an oil inlet ring groove which is connected to the bottom of the oil inlet channel and the oil inlet hole of the oil separator ring. The groove width of the oil inlet ring groove is larger than the diameter of the oil inlet channel and the oil inlet hole.
3. The oil separation structure for a wind turbine gearbox according to claim 2, characterized in that: In a natural state, the bottom of the oil separator ring is arc-shaped, and the arc-shaped bottom is in extrusion contact with the top surface of the steel sleeve.
4. The oil separation structure for a wind turbine gearbox according to claim 3, characterized in that: Both sides of the bottom of the oil storage cavity are symmetrical arc structures.
5. An oil separation structure for a wind turbine gearbox according to any one of claims 1 to 4, characterized in that: The oil separator ring is made of cast nylon.
6. The oil separation structure for a wind turbine gearbox according to claim 5, characterized in that: An inner step is provided inside the box body, the upper part of the oil dividing ring is located inside the inner step, and a fastening screw is provided between the oil dividing ring and the box body.
7. The oil separation structure for a wind turbine gearbox according to claim 6, characterized in that: The planet carrier is provided with a step groove for accommodating the steel sleeve, and fastening screws are provided between the planet carrier and the steel sleeve.
8. The oil separation structure for a wind turbine gearbox according to claim 7, characterized in that: A bearing is provided between the planet carrier and the box body.