Gear and gear box
By combining flexible and rigid wheel bodies, and utilizing the viscosity of lubricating oil to generate damping, the vibration and noise problem in wind turbine gearboxes is solved, achieving low-cost vibration and noise reduction, and improving the adaptability and transmission accuracy of gears.
Patent Information
- Application Number
- CN202520089451.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2035-01-15
AI Technical Summary
In existing wind turbine gearboxes, the vibration and noise problems of parallel gears are difficult to solve effectively, and traditional vibration reduction and noise reduction methods are costly and have strict design requirements.
The design combines flexible and rigid wheel bodies. The flexible wheel body has a damping cavity and an oil passage. The viscosity of the lubricating oil generates damping, absorbs and dissipates vibration energy, and achieves self-lubrication through the oil passage, thereby reducing vibration and noise.
This approach achieves reduced vibration and noise while lowering costs, improving gear adaptability and transmission accuracy, and extending service life.
Smart Images
Figure CN223483347U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gearbox technology, and in particular to a gear and a gearbox. Background Technology
[0002] In the field of wind turbine gearbox technology, vibration and noise issues urgently need to be addressed. Among them, the vibration and noise of parallel gears are particularly prominent. Operators often try to reduce vibration and noise by adding damping rings and dampers, which is not only costly but also requires high design parameters. If the design parameters are not properly designed, the vibration reduction effect of the gears will be difficult to meet the requirements. Utility Model Content
[0003] The purpose of this invention is to provide a gear that can reduce vibration and noise during use, and at a lower cost.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] A gear comprising:
[0006] A flexible wheel body has a first inner circumferential wall and a second inner circumferential wall arranged around its own axis. The first inner circumferential wall and the second inner circumferential wall are arranged radially spaced apart from the flexible wheel body. A damping cavity is formed between the first inner circumferential wall and the second inner circumferential wall. The damping cavity is configured to contain lubricating oil. The flexible wheel body has a plurality of oil passages spaced apart along its own circumference. The damping cavity is connected to the outside through the oil passages.
[0007] Optionally, the gear further includes a rigid wheel body coaxially connected to the flexible wheel body. The outer peripheral wall of the flexible wheel body is provided with a plurality of flexible teeth, and the outer peripheral wall of the rigid wheel body is provided with a plurality of rigid teeth. The plurality of flexible teeth and the plurality of rigid teeth are arranged in a one-to-one correspondence.
[0008] Optionally, there are two rigid wheels, and the flexible wheel is disposed between the two rigid wheels.
[0009] Optionally, the gear further includes a connector and a fastener. The flexible wheel body is provided with a plurality of first connecting holes spaced apart, and the rigid wheel body is provided with a plurality of second connecting holes spaced apart. The plurality of first connecting holes and the plurality of second connecting holes are arranged in a one-to-one correspondence. The connector passes through the first connecting holes and the second connecting holes and is connected to the fastener.
[0010] Optionally, one of the first inner peripheral wall and the second inner peripheral wall is circular, and the other is provided with a plurality of oil storage recesses at intervals along its circumference.
[0011] Optionally, a protrusion is formed between two adjacent oil storage recesses, and the protrusion extends into the damping cavity.
[0012] Optionally, the oil passage includes a first oil guide hole and a second oil guide hole that are interconnected. The opening end of the first oil guide hole is disposed on the first inner peripheral wall or the second inner peripheral wall, and the opening end of the second oil guide hole is disposed on the outer peripheral wall of the flexible wheel.
[0013] Optionally, the extension direction of the first oil guide hole and the extension direction of the second oil guide hole are set at an obtuse angle.
[0014] Optionally, the first oil guide hole is provided with a first blind hole at one end near the second oil guide hole along its own extension direction, and the second oil guide hole is provided with a second blind hole at one end near the first oil guide hole along its own extension direction.
[0015] Optionally, the flexible wheel body is provided with an openable and closable injection hole, and the damping cavity is connected to the outside through the injection hole.
[0016] Another objective of this invention is to provide a gearbox that can reduce vibration and noise during use, and at a lower cost.
[0017] To achieve this objective, the present invention adopts the following technical solution:
[0018] A gearbox includes a housing and a gear as described above, the gear being disposed within the housing.
[0019] The beneficial effects of this utility model are:
[0020] This utility model provides a gear and a gearbox. The gear includes a flexible wheel body. The flexible wheel body, made of flexible materials such as rubber and plastic, results in lower cost and lighter weight. It also exhibits good deformation capacity and adaptability during meshing, improving transmission errors and reducing vibration and noise. The flexible wheel body has a first inner circumferential wall and a second inner circumferential wall arranged around its own axis. These two inner circumferential walls are radially spaced, forming a damping cavity between them. This damping cavity contains lubricating oil, which generates damping through its viscosity, thereby absorbing and dissipating vibration energy. The flexible wheel body has multiple oil passages spaced circumferentially. The damping cavity is connected to the outside through these passages. During gear rotation, lubricating oil repeatedly enters the damping cavity and then returns to the oil passages, thus lubricating the gear itself and reducing vibration and impact loads. The gearbox includes a housing and a gear, with the gear housed within the housing. Through these features, the gear of this application can reduce vibration and noise during use and is cost-effective. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the gear provided in an embodiment of the present utility model;
[0022] Figure 2 This is a cross-sectional view of the gear provided in an embodiment of the present utility model;
[0023] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;
[0024] Figure 4 This is a cross-sectional view of a gear provided in another embodiment of the present invention;
[0025] Figure 5 This is a schematic diagram of a gear provided in another embodiment of the present invention;
[0026] Figure 6 This is a cross-sectional view of a gear provided in another embodiment of the present invention;
[0027] Figure 7 This is a cross-sectional view of a gear provided in another embodiment of the present invention.
[0028] In the picture:
[0029] 1. Flexible wheel body; 11. First inner peripheral wall; 111. Oil storage recess; 112. Protrusion; 12. Second inner peripheral wall; 13. Damping cavity; 14. Oil passage; 141. First oil guide hole; 1411. First blind hole; 142. Second oil guide hole; 1421. Second blind hole; 15. Flexible tooth; 16. First connecting hole; 17. Injection hole; 2. Rigid wheel body; 21. Rigid tooth; 22. Second connecting hole. Detailed Implementation
[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 utility model based on the specific circumstances.
[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0033] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0034] like Figures 1-7 As shown, this embodiment provides a gear, which includes a flexible wheel body 1. The flexible wheel body 1 has a first inner circumferential wall 11 and a second inner circumferential wall 12 arranged around its own axial direction. The first inner circumferential wall 11 and the second inner circumferential wall 12 are arranged radially spaced apart, and a damping cavity 13 is formed between the first inner circumferential wall 11 and the second inner circumferential wall 12. The damping cavity 13 is configured to contain lubricating oil. The flexible wheel body 1 has a plurality of oil passages 14 spaced apart along its own circumference, and the damping cavity 13 is connected to the outside through the oil passages 14.
[0035] In this embodiment, the flexible wheel 1, made of flexible materials such as rubber and plastic, results in lower gear cost and lighter weight. It also exhibits good deformation capacity and adaptability during meshing, improving transmission errors and reducing vibration and noise. The flexible wheel 1 has a first inner circumferential wall 11 and a second inner circumferential wall 12 arranged axially around its own axis. These walls are radially spaced, forming a damping cavity 13 between them. The damping cavity 13 contains lubricating oil, which generates damping through its viscosity, thereby absorbing and dissipating vibration energy. The flexible wheel 1 has multiple oil passages 14 spaced circumferentially. The damping cavity 13 is connected to the outside through these passages. During gear rotation, lubricating oil repeatedly enters the damping cavity 13 and then returns to the oil passages 14, thus lubricating the gear itself and reducing vibration and impact loads. The gearbox includes a housing and gears, with the gears housed within the housing. With the above-described configuration, the gear in this embodiment can reduce vibration and noise during use, and at a lower cost.
[0036] The specific structure of the gear is explained below:
[0037] Specifically, if Figure 5 As shown, the gear also includes a rigid wheel body 2 coaxially connected to the flexible wheel body 1. The rigid wheel body 2 is generally made of high-strength, high-rigidity materials such as metal to ensure the stability and durability of the gear when transmitting torque. The outer peripheral wall of the flexible wheel body 1 has multiple flexible teeth 15, and the outer peripheral wall of the rigid wheel body 2 has multiple rigid teeth 21. The multiple flexible teeth 15 and multiple rigid teeth 21 are arranged in a one-to-one correspondence to ensure the accuracy and stability of the gear when transmitting torque. Through the combination of flexible teeth 15 and rigid teeth 21, the gear can balance flexibility and rigidity during meshing, reducing meshing impact and vibration, achieving vibration reduction and noise reduction, while ensuring the accuracy and stability of torque transmission. This allows the gear to adapt to a wider range of working conditions and load variations.
[0038] More specifically, there are two rigid wheel bodies 2, and the flexible wheel body 1 is located between the two rigid wheel bodies 2, which gives the gear strong axial support and stability, and can withstand greater torque and load. The flexible wheel body 1 is located between the two rigid wheel bodies 2, which helps to further reduce the vibration and noise generated by the gear during meshing, so that the gear can maintain stable performance and extend its service life when running for a long time and bearing high load.
[0039] It should be noted that the flexible wheel 1 can be made of materials such as nylon, polypropylene, and rubber. The rigid wheel 2 can be made of cast steel or cast iron. No specific material limitations are imposed on the above components, as long as they can achieve the aforementioned functions. Furthermore, if... Figure 1As shown, for low-torque, low-load operating conditions, the gear can use a flexible wheel body 1 as the main structure to meet the strength and other requirements under specific operating conditions; for example... Figure 5 As shown, for high torque and high load conditions (such as those applied in wind turbine gearboxes), the strength of the gear needs to meet high requirements. Therefore, a combination of flexible wheel body 1 and rigid wheel body 2 can be used to form the main structure of the gear. The flexible wheel body 1 achieves self-lubrication and vibration reduction, while the rigid wheel body 2 is used to meet the strength requirements of the gear.
[0040] Specifically, if Figure 5 and Figure 6 As shown, the gear also includes a connector and a fastener. The flexible wheel 1 has multiple first connecting holes 16 spaced apart, and the rigid wheel 2 has multiple second connecting holes 22 spaced apart. The multiple first connecting holes 16 and the multiple second connecting holes 22 are arranged in a one-to-one correspondence. The connector passes through the first connecting holes 16 and the second connecting holes 22 and is connected to the fastener, used to firmly connect the flexible wheel 1 and the rigid wheel 2 together. Through the fixing effect of the connector and the fastener, the gear can maintain a stable meshing relationship during transmission, reducing transmission errors caused by vibration and impact.
[0041] More specifically, in this embodiment, the connector is a bolt, and the fastener is a nut. The bolt passes through the first connecting hole 16 and the second connecting hole 22 and is threaded to the nut. The locking action of the nut allows the flexible wheel 1 and the rigid wheel 2 to form an integral structure, improving their connection strength and ensuring the accuracy and stability of the gear during torque transmission. In other embodiments, the connector is a stud, and the fastener includes a washer and a nut. The stud passes through the washer, the first connecting hole 16, and the second connecting hole 22, and both ends of the stud are threaded to the nut, so that the washer is sandwiched between the nut and the corresponding connecting hole. It is understood that the specific structure of the connector and fastener is not limited, as long as the above-mentioned functions are achieved.
[0042] Specifically, if Figures 1-6 As shown, in this embodiment, of the first inner peripheral wall 11 and the second inner peripheral wall 12, one is circular, and the other has multiple oil storage recesses 111 spaced apart along its circumference. This allows for a more uniform distribution of lubricating oil and also provides a certain amount of storage and obstruction for the lubricating oil, which is beneficial for fully utilizing the viscous damping effect of the lubricating oil during gear operation, thereby achieving vibration reduction and noise reduction. Figure 7As shown, in other embodiments, both the first inner peripheral wall 11 and the second inner peripheral wall 12 are circular, thus forming an annular damping cavity 13. This not only facilitates machining and forming, but the annular damping cavity 13 can also provide a continuous and stable lubricating oil film, ensuring that the gear is always adequately lubricated during operation, thereby adapting to different working conditions. In other embodiments, the first inner peripheral wall 11 and the second inner peripheral wall 12 are each provided with multiple oil storage recesses 111 spaced apart along their circumference, thereby extending the residence time of the lubricating oil in the damping cavity 13, fully utilizing the viscous damping effect of the lubricating oil, and further facilitating vibration reduction and noise reduction to meet the needs of different working conditions.
[0043] More specifically, if Figure 2 , Figure 4 and Figure 6 As shown, multiple oil-storing recesses 111 are spaced apart along their circumference on the first inner peripheral wall 11 or the second inner peripheral wall 12. This arrangement allows the oil-storing recesses 111 to store a certain amount of lubricating oil during rotation, ensuring that there is always enough lubricating oil in the damping cavity 13 for the gear's self-lubrication, and preventing all the lubricating oil from being thrown out through the oil passage 14. A protrusion 112 is formed between two adjacent oil-storing recesses 111, extending into the damping cavity 13, thereby increasing the contact area between the inner wall of the damping cavity 13 and the lubricating oil. This helps to increase the viscous resistance of the lubricating oil to enhance the damping effect, thus more effectively absorbing and dissipating vibration energy.
[0044] More specifically, such as Figure 1 and Figure 2 As shown, in this embodiment, the first inner peripheral wall 11 is disposed on the inner side of the gear, and the second inner peripheral wall 12 is disposed on the side of the gear near its outer peripheral wall. The first inner peripheral wall 11 is circular, while the second inner peripheral wall 12 is provided with a plurality of oil storage recesses 111 spaced apart along its circumference, thereby meeting the requirements of low torque operation. Figure 4 As shown, in another embodiment, a first inner peripheral wall 11 is disposed on the inner side of the gear and has a plurality of oil storage recesses 111 spaced apart along its circumference. A second inner peripheral wall 12 is disposed on the side of the gear near its outer peripheral wall and is circular in shape, thereby meeting the requirements of different working conditions under low torque. Figure 5 and Figure 6 As shown, in another embodiment, the flexible wheel 1 is coaxially disposed between two rigid wheels 2, the first inner peripheral wall 11 is disposed on the inner side of the flexible wheel 1, and the second inner peripheral wall 12 is disposed on the side of the flexible wheel 1 near its outer peripheral wall. The first inner peripheral wall 11 is circular, and the second inner peripheral wall 12 is provided with a plurality of oil storage recesses 111 at intervals along its circumference, thereby satisfying the high torque working condition.
[0045] Specifically, if Figures 1-6As shown, the oil passage 14 includes a first oil guide hole 141 and a second oil guide hole 142 that are interconnected, thereby forming a continuous lubricating oil flow path within the flexible wheel body 1. Figure 2 and Figure 3 As shown, the opening end of the first oil guide hole 141 is disposed on the first inner peripheral wall 11 or the second inner peripheral wall 12, and the opening end of the second oil guide hole 142 is disposed on the outer peripheral wall of the flexible wheel body 1. When the flexible wheel body 1 rotates clockwise, the lubricating oil enters the damping cavity 13 through the second oil guide hole 142 and the first oil guide hole 141, realizing the collection and storage of the lubricating oil. When the flexible wheel body 1 rotates counterclockwise, the lubricating oil exits from the damping cavity 13 through the first oil guide hole 141 and the second oil guide hole 142, and flows to the outer peripheral wall of the flexible wheel body 1, thereby realizing the self-lubricating function of the gear.
[0046] More specifically, the diameter of the first oil guide hole 141 is 2–4 mm, and the diameter of the second oil guide hole 142 is 2.5–4.5 mm. This arrangement ensures a proper oil inlet and outlet ratio, thereby guaranteeing better self-lubrication and vibration damping of the gears. It should be noted that those skilled in the art can adapt the length, diameter, position, and orientation of the openings of the first and second oil guide holes 141 and 142 to meet actual operating conditions; no further limitations are imposed here.
[0047] Specifically, the extension direction of the first oil guide hole 141 and the extension direction of the second oil guide hole 142 are set at an obtuse angle, which allows the lubricating oil to change direction more smoothly during the flow process, reducing flow resistance and energy loss. This helps to ensure that the lubricating oil can evenly cover the meshing area and sliding contact surface of the gear, thereby improving lubrication efficiency and gear transmission performance.
[0048] More specifically, in this embodiment, the extending direction of the first oil guide hole 141 and the extending direction of the second oil guide hole 142 are set at a 100-degree angle to ensure the lubrication effect of the lubricating oil. In other embodiments, the extending direction of the first oil guide hole 141 and the extending direction of the second oil guide hole 142 can be 120 degrees. The specific size of the above-mentioned angle is not limited here, as long as the above-mentioned function can be achieved.
[0049] Specifically, if Figure 3As shown, the first oil guide hole 141 has a first blind hole 1411 at its end near the second oil guide hole 142 along its extension direction, and the second oil guide hole 142 has a second blind hole 1421 at its end near the first oil guide hole 141 along its extension direction. By providing the first blind hole 1411 and the second blind hole 1421, temporary storage of lubricating oil can be achieved, and the flow speed and direction of the lubricating oil can be adjusted to ensure that the lubricating oil can evenly cover the meshing area and sliding contact surface of the gear. At the same time, it facilitates the machining and fabrication of the first oil guide hole 141 and the second oil guide hole 142, improving operational efficiency.
[0050] Specifically, if Figure 1 and Figure 2 As shown, the flexible wheel body 1 has an openable and closable injection hole 17. The damping cavity 13 is connected to the outside through the injection hole 17, so as to inject lubricating fluid into the damping cavity 13, making the operation more convenient and quick. The gear includes a plug, which is threaded to the injection hole 17, thereby realizing the opening or closing of the injection hole 17.
[0051] It should be noted that the gears in this embodiment are made of flexible materials, which are low in cost, readily available, and lightweight. During meshing, they can improve transmission errors and reduce vibration and impact intensity. Furthermore, by providing an oil passage 14, the gears can achieve self-lubrication during meshing, effectively reducing vibration and impact loads. Simultaneously, during self-lubrication, the gears can fill the damping cavity 13 with lubricating oil, which not only utilizes the viscosity of the liquid to generate damping and dissipate vibration energy, but also lubricates and cools the gears.
[0052] This embodiment also provides a gearbox, which includes a housing and gears. The gears are disposed within the housing, which can reduce vibration and noise during use and has a low cost. It should be noted that those skilled in the art can apply gears to devices such as differentials and transmissions to achieve the above functions, and no specific application areas of gears are limited here.
[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A gear, characterized in that, include: A flexible wheel body (1) has a first inner circumferential wall (11) and a second inner circumferential wall (12) arranged around its own axis inside the flexible wheel body (1). The first inner circumferential wall (11) and the second inner circumferential wall (12) are arranged radially spaced apart from the flexible wheel body (1). A damping cavity (13) is formed between the first inner circumferential wall (11) and the second inner circumferential wall (12). The damping cavity (13) is configured to contain lubricating oil. The flexible wheel body (1) has a plurality of oil passages (14) spaced apart along its own circumference. The damping cavity (13) is connected to the outside through the oil passages (14).
2. The gear according to claim 1, characterized in that, The gear also includes a rigid wheel body (2) coaxially connected to the flexible wheel body (1). The outer peripheral wall of the flexible wheel body (1) is provided with a plurality of flexible teeth (15), and the outer peripheral wall of the rigid wheel body (2) is provided with a plurality of rigid teeth (21). The plurality of flexible teeth (15) and the plurality of rigid teeth (21) are arranged in a one-to-one correspondence.
3. The gear according to claim 2, characterized in that, Two rigid wheels (2) are provided, and the flexible wheel (1) is disposed between the two rigid wheels (2).
4. The gear according to claim 2, characterized in that, The gear also includes a connector and a fastener. The flexible wheel body (1) is provided with a plurality of first connecting holes (16) spaced apart, and the rigid wheel body (2) is provided with a plurality of second connecting holes (22) spaced apart. The plurality of first connecting holes (16) and the plurality of second connecting holes (22) are arranged in a one-to-one correspondence. The connector passes through the first connecting holes (16) and the second connecting holes (22) and is connected to the fastener.
5. The gear according to claim 1, characterized in that, Of the first inner peripheral wall (11) and the second inner peripheral wall (12), one is circular and the other is provided with multiple oil storage recesses (111) spaced apart along its circumference.
6. The gear according to claim 5, characterized in that, A protrusion (112) is formed between two adjacent oil storage recesses (111), and the protrusion (112) extends into the damping cavity (13).
7. The gear according to claim 1, characterized in that, The oil passage (14) includes a first oil guide hole (141) and a second oil guide hole (142) that are interconnected. The opening end of the first oil guide hole (141) is disposed on the first inner peripheral wall (11) or the second inner peripheral wall (12), and the opening end of the second oil guide hole (142) is disposed on the outer peripheral wall of the flexible wheel (1).
8. The gear according to claim 7, characterized in that, The extension direction of the first oil guide hole (141) and the extension direction of the second oil guide hole (142) are set at an obtuse angle.
9. The gear according to claim 8, characterized in that, The first oil guide hole (141) has a first blind hole (1411) at one end near the second oil guide hole (142) along its own extension direction, and the second oil guide hole (142) has a second blind hole (1421) at one end near the first oil guide hole (141) along its own extension direction.
10. The gear according to any one of claims 1-9, characterized in that, The flexible wheel (1) is provided with an openable and closable injection hole (17), and the damping cavity (13) is connected to the outside through the injection hole (17).
11. A gearbox, characterized in that, It includes a housing and a gear as described in any one of claims 1-10, wherein the gear is disposed within the housing.