Wind power gear box and low-speed bearing oil supply device thereof
By installing an oil supply assembly on the planetary carrier of the wind turbine gearbox, the problem of no lubrication in low-speed bearings was solved, achieving effective lubrication even in the absence of electricity, thus improving the reliability and lifespan of the wind turbine gearbox.
Patent Information
- Application Number
- CN202422811229.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-18
AI Technical Summary
When the wind turbine gearbox is running at low speed, the low-speed bearings are in a state of no lubrication and dry friction, which affects their reliability and service life. The existing lubrication system cannot effectively supply oil when there is no power.
A low-speed bearing oil supply device is designed, which utilizes the oil supply components on the planetary carrier, including an oil storage pipe, an oil outlet pipe, and an oil outlet structure, to ensure that the lubricating oil can effectively lubricate the low-speed bearing when the fan is not powered.
When the wind turbine is rotating freely without power, it ensures that the low-speed end bearing is in an effective lubricated state, which improves the reliability and service life of the wind turbine gearbox and is suitable for new designs and retrofitting of old products.
Smart Images
Figure CN223523890U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of wind power gear box, concretely relates to a wind power gear box and low speed bearing oil supply device thereof. BACKGROUND
[0002] The gear box in the wind turbine is an important mechanical component, which mainly functions to transmit the power generated by the wind wheel under the action of wind to the generator and make it obtain corresponding rotating speed. Moreover, the unit is installed at the wind port of high mountains, wilderness, beaches, islands and the like, is subjected to the action of irregularly changing direction and load wind force and the impact of strong gusts, is subjected to the influence of scorching heat and severe cold and extreme temperature difference all the year round, besides, is located in a poor traffic natural environment, the gear box is installed in the narrow space on the tower top, once a fault occurs, it is very difficult to repair, therefore, higher requirements than general machinery are put forward to the reliability and service life thereof.
[0003] As a batch product, the wind power gear box requires a design life of more than 20 years, and the reliability of each part inside the gear box is relatively high. Since there is a long time without power supply from the completion of the installation of the wind turbine to the final grid connection, the lubrication system in the prior art includes a combination of mechanical pump lubrication and motor pump lubrication. In this working condition, the wind wheel is in a free rotating state with a rotating speed of 0-1 rpm in the low speed running stage. At this time, the mechanical pump cannot stably supply oil due to its low rotating speed, and the motor pump cannot work due to the lack of power supply. The low speed bearing of the gear box is in a dry friction running state without lubrication. Due to the liquid level limitation, the low speed bearing cannot realize oil immersion lubrication, which has a bad influence on the reliability of the bearing. Long time operation will affect the service life of the bearing. In view of the above, a wind power gear box and a low speed bearing oil supply device thereof are urgently needed. SUMMARY
[0004] To solve the above-mentioned technical problems in the prior art, on the one hand, the utility model provides a low speed bearing oil supply device for a wind power gear box, which comprises a box body and a planet carrier arranged in the box body, wherein:
[0005] One end of the planet carrier penetrates the box body, lubricating oil is arranged between the box body and the planet carrier, a first bearing is arranged between the planet carrier and one end of the box body, and a second bearing is arranged between the planet carrier and the other end of the box body. The axis of the planet carrier is inclined to the horizontal plane, a connecting column and an oil supply assembly corresponding to the connecting column are arranged on the planet carrier.
[0006] The oil supply assembly comprises an oil storage pipe arranged on the planet carrier, an oil inlet communicated with the oil storage pipe, a first oil outlet pipe communicated with one end of the oil storage pipe, a second oil outlet pipe communicated with the other end of the oil storage pipe, the first oil outlet pipe is communicated with a first oil outlet, the second oil outlet pipe is communicated with a second oil outlet, an oil baffle is arranged on one side of the second oil outlet, the first oil outlet is communicated with the first bearing, and the second oil outlet is communicated with the second bearing.
[0007] Further, in the low-speed bearing oil supply device for a wind power gear box, the inner ring of the first bearing is sleeved on the outer periphery of the planet carrier, and the outer ring is sleeved on the inner side of the box body.
[0008] Further, in the low-speed bearing oil supply device for a wind power gear box, the planet carrier and the box body are in sealed connection.
[0009] As a specific embodiment, in the low-speed bearing oil supply device for a wind power gear box, the oil storage branch pipe is communicated with the oil storage pipe away from the axis of the planet carrier.
[0010] On the other hand, the utility model also provides a wind power gear box, the wind power gear box includes the low-speed bearing oil supply device.
[0011] The wind power gear box and the low-speed bearing oil supply device thereof have the following advantages and beneficial effects:
[0012] The device is provided with an oil supply assembly on the planet carrier, the planet carrier is characterized by being circumferentially distributed, the oil inlet, the oil storage pipe, the oil storage branch pipe, the oil outlet pipe and the oil outlet structure are increased, the low-speed end bearing is ensured to be in an effective lubrication state under the free rotation condition of the fan without power supply, the reliability of the wind power gear box under special working conditions is improved, the device has good practicability and safety, and the improvement on the original planet carrier has no influence on the overall scheme, and the device can be applied to new scheme design and old product modification. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only for further understanding of the embodiments of the utility model and form a part of the utility model, and the drawings can also be used by the ordinary skilled in the art to obtain other drawings without creative labor. In the drawings:
[0014] Figure 1is the structural schematic view of the low-speed bearing oil supply device for the wind power gear box of the utility model;
[0015] Figure 2 is the state diagram of oil storage of the oil supply assembly in the low-speed bearing oil supply device for the wind power gear box of the utility model;
[0016] Figure 3 is Figure 2 the local enlarged view of I in the middle.
[0017] Mark explanation:
[0018] 1-box, 2-carrier, 3-lubricating oil, 4-first bearing, 5-second bearing, 6-oil supply assembly, 61-oil storage pipe, 62-oil inlet, 63-first oil outlet pipe, 64-second oil outlet pipe, 65-oil baffle, 66-oil storage branch pipe, 7-connection column. Specific implementation
[0019] In order to make the purpose, technical scheme and advantage of the utility model more clear, the following will combine the specific embodiment and corresponding drawing of the utility model to make clear, complete description to the technical scheme of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiment. Based on the embodiment of the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.
[0020] As Figure 1 , Figure 2 , Figure 3 indicated, the utility model discloses a kind of wind power gear box and its low-speed bearing oil supply device.
[0021] In one aspect, the low-speed bearing oil supply device for the wind power gear box comprises a box body 1, a planet carrier 2 arranged in the box body 1, wherein the planet carrier 2 penetrates through the box body 1 at one end and is arranged in the box body 1 at the other end, the planet carrier 2 and the box body 1 can rotate relative to each other, a lubricating oil 3 is arranged between the box body 1 and the planet carrier 2, the lubricating oil 3 is always located at the lower part of the box body 1 under the action of gravity, a first bearing 4 is arranged between the planet carrier 2 and the box body 1 at one end, and a second bearing 5 is arranged between the planet carrier 2 and the box body 1 at the other end, the first bearing 4 and the second bearing 5 are both arranged on the steps arranged on the outer periphery of the planet carrier 2, the axes of the first bearing 4 and the second bearing 5 coincide with each other, the axis of the planet carrier 2 is inclined to the horizontal plane, a connecting column 7 and an oil supply assembly 6 corresponding to the connecting column 7 are arranged on the planet carrier 2, the connecting column 7 and the oil supply assembly 6 are arranged at the circumferential two ends of the planet carrier 2, when the connecting column 7 is located at the upper part of the box body 1, the oil supply assembly 6 is located at the lower part of the box body 1, and when the connecting column 7 is located at the lower part of the box body 1, the oil supply assembly 6 is located at the upper part of the box body 1; the oil supply assembly 6 comprises an oil storage pipe 61 arranged on the planet carrier 2, an oil inlet 62 communicated with the oil storage pipe 61, a first oil outlet pipe 63 communicated with one end of the oil storage pipe 61, and a second oil outlet pipe 64 communicated with the other end of the oil storage pipe 61, the first oil outlet pipe 63 is communicated with a first oil outlet (not shown in the figure), the second oil outlet pipe 64 is communicated with a second oil outlet (not shown in the figure), an oil baffle 65 is arranged on one side of the second oil outlet, the lubricating oil 3 flowing out of the second oil outlet can be guided to flow into the second bearing 5 through the oil baffle 65, the first oil outlet is communicated with the first bearing 4, and the second oil outlet is communicated with the second bearing 5.
[0022] Further, in the low-speed bearing oil supply device for the wind power gear box, the inner ring of the first bearing 4 is sleeved on the outer periphery of the planet carrier 2, and the outer ring is sleeved on the inner side of the box body 1; the inner ring of the second bearing 5 is sleeved on the outer periphery of the planet carrier 2, and the outer ring is sleeved on the inner side of the box body 1; the mutual rotation between the planet carrier 2 and the box body 1 is realized through the first bearing 4 and the second bearing 5.
[0023] Further, in the low-speed bearing oil supply device for the wind power gear box, the planet carrier 2 and the box body 1 are in sealed connection, which prevents the leakage of sealing oil, pollutes the environment in the unit, and prevents the dust outside the box body 1 from entering the box body 1, thereby affecting the normal operation of the gear box.
[0024] As a specific embodiment, in the low-speed bearing oil supply device for the wind power gear box, the oil storage branch pipe 66 is communicated with the oil storage pipe 61 away from the axis of the planet carrier 2, of course, the arrangement mode and the number of the oil storage branch pipe 66 need to be set according to the actual use process, and in this way, the oil supply assembly 6 has more space to store more lubricating oil 3 when it is below the liquid surface of the lubricating oil 3.
[0025] In another aspect, the utility model provides a wind power gear box still, the wind power gear box includes above low speed bearing oil supply unit.
[0026] The working principle of the wind power gear box and the low speed bearing oil supply unit thereof is as follows: when the oil supply assembly 6 is at the lower part, the oil inlet 62 is below the liquid level of the lubricating oil 3, the lubricating oil 3 enters the oil storage pipe 61 through the oil inlet 62, and then flows to the oil storage branch pipe 66, with the rotation of the planet carrier 2, the oil supply assembly 6 moves to the upper part of the box body 1, the connecting column 7 moves to the lower part of the box body 1, at this time, due to the inversion of the oil supply assembly 6, part of the lubricating oil 3 in the oil storage pipe 61 and the oil storage branch pipe 66 flows to the first bearing 4 through the first oil outlet pipe 63 and the first oil outlet, lubricates the first bearing 4, and the other part flows to the second bearing 5 through the second oil outlet pipe 64 and the second oil outlet, lubricates the second bearing 5.
[0027] Compared with the prior art, the wind power gear box and the low speed bearing oil supply unit thereof have the following advantages and beneficial effects:
[0028] The device has good practicability and safety, and belongs to improvement on the original planet carrier 2, has no influence on the overall scheme, and can be applied to new scheme design and old product modification.
[0029] It should be noted that, in this article, unless otherwise specified and limited, the term "connection" or its synonyms should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements or interaction relationship of two elements, for those skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances. Moreover, such as "first" and "second" and other expressions are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. At the same time, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. In addition, "front", "back", "left", "right", "up", "down" and the like in this article are referred to the placement state shown in the drawings.
[0030] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the examples, those skilled in the art should understand that: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.
Claims
1. A low speed bearing oil supply arrangement for a wind turbine gearbox, characterised in that, The low-speed bearing oil supply device for a wind power gear box comprises a box body and a planet carrier arranged in the box body, wherein: One end of the planet carrier penetrates through the box body, lubricating oil is arranged between the box body and the planet carrier, a first bearing is arranged between the planet carrier and one end of the box body, a second bearing is arranged between the planet carrier and the other end of the box body, the axis of the planet carrier is inclined to the horizontal plane, a connecting column is arranged on the planet carrier, and an oil supply assembly corresponding to the connecting column is arranged on the planet carrier. The oil supply assembly comprises an oil storage pipe arranged on the planet carrier, an oil inlet communicated with the oil storage pipe, a first oil outlet pipe communicated with one end of the oil storage pipe, and a second oil outlet pipe communicated with the other end of the oil storage pipe, the first oil outlet pipe is communicated with a first oil outlet, the second oil outlet pipe is communicated with a second oil outlet, an oil baffle is arranged on one side of the second oil outlet, the first oil outlet is communicated with the first bearing, and the second oil outlet is communicated with the second bearing.
2. A low speed bearing oil supply arrangement for a wind turbine gearbox according to claim 1, characterised in that, The inner ring of the first bearing is sleeved on the outer periphery of the planet carrier, and the outer ring is sleeved on the inner side of the box body, the inner ring of the second bearing is sleeved on the outer periphery of the planet carrier, and the outer ring is sleeved on the inner side of the box body.
3. The low speed bearing oil supply arrangement for a wind turbine gearbox according to claim 1, characterized in that, The planet carrier and the box body are in sealed connection.
4. The low speed bearing oil supply device for a wind turbine gearbox according to claim 1, characterized in that, The oil storage pipe is communicated with an oil storage branch pipe away from the axis of the planet carrier.
5. A wind turbine gearbox, characterized in that The wind power gear box comprises the low-speed bearing oil supply device according to any one of claims 1-4.