Supporting mechanism of gearbox and transmission device
By setting a combination structure of support base, torque arm, connecting pin and elastic washer ring in the gearbox, the problem of axial movement of torque arm and elastic pin in gearbox is solved, and the smooth and safe operation of gearbox is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NGC (HUAIAN) HIGH SPEED GEAR MFG CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-04-21
AI Technical Summary
The interference fit between the torque arm and the flexible pin in the existing gearbox causes axial movement, which affects the normal operation of the gearbox and may even lead to serious consequences such as detachment.
The structure adopts a combination of support base, torque arm, connecting pin and elastic washer. By setting first and second washer with different radial stiffness or width, the force difference at both ends of the connecting pin is balanced to avoid movement.
This improves the smoothness and safety of gearbox operation, avoids the misalignment of connecting pins caused by transmission chain deformation and the accumulation of alternating loads, and ensures the stable operation of the gearbox.
Smart Images
Figure CN224150136U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gearbox technology, and in particular to a gearbox support mechanism and transmission device. Background Technology
[0002] In wind turbine generators, the gearbox primarily transmits the power generated by the blades under wind force to the generator, enabling it to achieve the corresponding rotational speed. As a critical transmission component in wind power generation, ensuring the normal operation of the gearbox is directly related to the reliability and safety of the entire wind turbine generator.
[0003] In a single-shaft bearing wind turbine gearbox, the main shaft bearing and support assembly bear the loads of the entire transmission chain in all directions. In existing structures, the gearbox's torque arm and flexible pin are typically fitted with an interference fit. When the axial clearance of the main shaft bearing in the transmission chain is too large or fails, the gearbox will be subjected to axial forces, making the flexible pin prone to axial movement. Moreover, when the transmission chain deforms under load, the different distances from the two ends of the flexible pin to the center of the main shaft bearing result in uneven forces on both sides of the flexible pin, causing it to slowly move towards the motor side. With the accumulation of alternating loads, the movement distance of the flexible pin gradually increases, eventually failing to provide effective support for the gearbox, directly affecting its normal operation, and even leading to serious consequences such as gearbox detachment.
[0004] Therefore, there is an urgent need for a gearbox support mechanism and transmission device to solve the above-mentioned technical problems. Utility Model Content
[0005] The purpose of this invention is to provide a support mechanism for a gearbox that can improve the smoothness and safety of gearbox operation.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A gearbox support mechanism is disposed between the main bearing and the motor, the gearbox support mechanism comprising:
[0008] Support base, providing installation space;
[0009] Torque arm, the two ends of which are located within the mounting space;
[0010] A connecting pin is inserted between the torque arm and the support seat. The end of the connecting pin near the main bearing is the first end, and the end of the connecting pin near the motor is the second end.
[0011] An elastic pad is arranged around the outer peripheral wall of the connecting pin, including a first pad ring and a second pad ring. The first pad ring is sandwiched between the support base and the first end, and the second pad ring is sandwiched between the support base and the second end.
[0012] The first washer and the second washer have the same width along their own axial direction but different radial stiffness; or, the first washer and the second washer have different widths along their own axial direction but the same radial stiffness.
[0013] Optionally, the radial stiffness of the second washer ring is determined according to the following formula: if W1 = W2,
[0014] In the formula:
[0015] W1 is the width of the first washer along its own axial direction, in mm;
[0016] W2 is the width of the second washer along its own axial direction, in mm;
[0017] K1 is the radial stiffness of the first washer ring, in kN / mm;
[0018] K2 is the radial stiffness of the second washer ring, in kN / mm;
[0019] L1 is the distance from the center of the first washer along its own axis to the center of the main bearing along its own axis, in mm;
[0020] L2 is the distance from the center of the second washer along its own axis to the center of the main bearing along its own axis, in mm.
[0021] Optionally, the width of the second washer along its own axial direction is determined according to the following formula: if K1 = K2,
[0022] In the formula:
[0023] W1 is the width of the first washer along its own axial direction, in mm;
[0024] W2 is the width of the second washer along its own axial direction, in mm;
[0025] K1 is the radial stiffness of the first washer ring, in kN / mm;
[0026] K2 is the radial stiffness of the second washer ring, in kN / mm;
[0027] L1 is the distance from the center of the first washer along its own axis to the center of the main bearing along its own axis, in mm;
[0028] L2 is the distance from the center of the second washer along its own axis to the center of the main bearing along its own axis, in mm.
[0029] Optionally, the first washer ring and / or the second washer ring are provided with annular grooves along their own circumference, and there are multiple annular grooves, which are spaced apart along the own axial direction of the first washer ring and / or the second washer ring.
[0030] Optionally, the width b of the annular groove is 10 to 20 mm.
[0031] Optionally, the number of annular grooves is 8 to 10.
[0032] Optionally, the first pad ring and / or the second pad ring includes at least one pad block, and a plurality of the pad blocks are arranged to form a ring structure.
[0033] Optionally, the support base includes a plurality of support plates, with each pair of support plates being parallel to each other and spaced apart as a group, and at least two groups of support plates being spaced apart along the length direction of the torque arm, with the end of the torque arm being disposed between each group of support plates.
[0034] Optionally, multiple connecting pins are provided, and the multiple connecting pins are correspondingly inserted into multiple sets of support plates, and the end of the torque arm is connected to the support plate through the connecting pins.
[0035] Another objective of this invention is to provide a transmission device that can improve the smoothness and safety of its operation.
[0036] To achieve this objective, the present invention adopts the following technical solution:
[0037] A transmission device includes a gearbox and a support mechanism for the gearbox as described above, the support mechanism being connected to the input shaft of the gearbox.
[0038] The beneficial effects of this utility model are:
[0039] This utility model provides a gearbox support mechanism, a gearbox, and a transmission chain. The gearbox support mechanism is disposed between the main bearing and the motor, and includes a support base, a torque arm, a connecting pin, and elastic pads. The two ends of the torque arm are located within the mounting space of the support base. The connecting pin passes through the torque arm and the support base, connecting the torque arm to the support base via the connecting pin, thus improving the connection strength and stability of the overall structure. The end of the connecting pin near the main bearing is the first end, and the end near the motor is the second end. Elastic pads are disposed on the outer peripheral wall of the connecting pin, including a first pad and a second pad. The first pad is clamped between the support base and the first end, and the second pad is clamped between the support base and the second end, providing independent elastic support to both ends of the connecting pin. By setting the first pad and the second pad to have the same width along their axial direction but different radial stiffness; or, setting the first pad and the second pad to have different widths along their axial direction but the same radial stiffness, the force difference at both ends of the connecting pin is balanced, preventing the connecting pin from shifting due to transmission chain deformation and the accumulation of alternating loads. The transmission device includes a gearbox and a gearbox support mechanism, the latter being connected to the gearbox's input shaft. Through this configuration, the gearbox support mechanism of this application can improve the smoothness and safety of gearbox operation. Attached Figure Description
[0040] Figure 1 This is a schematic diagram of the gearbox support mechanism provided in this embodiment of the present invention installed between the main bearing and the motor;
[0041] Figure 2 This is an isometric view of the gearbox support mechanism provided in this embodiment of the utility model;
[0042] Figure 3 This is a front view of the gearbox support mechanism provided in an embodiment of the present utility model;
[0043] Figure 4 This is a top view of the gearbox support mechanism provided in this embodiment of the utility model;
[0044] Figure 5 This is a cross-sectional view of the gearbox support mechanism provided in an embodiment of the present utility model;
[0045] Figure 6 yes Figure 5 A magnified view of a section at point A in the middle;
[0046] Figure 7 This is a schematic diagram of the first washer ring provided in an embodiment of the present invention.
[0047] In the picture:
[0048] 100. Main bearing; 200. Motor; 1. Support base; 11. Support plate; 2. Torque arm; 3. Connecting pin; 31. First end; 32. Second end; 4. Elastic pad; 41. First washer ring; 411. Pad block; 42. Second washer ring; 421. Ring groove. Detailed Implementation
[0049] 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, and not the entire structure.
[0050] 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.
[0051] 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.
[0052] 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.
[0053] In wind turbine generators, the gearbox primarily transmits the power generated by the blades under wind force to the generator, enabling it to achieve the corresponding rotational speed. As a critical transmission component in wind power generation, ensuring the normal operation of the gearbox is directly related to the reliability and safety of the entire wind turbine generator.
[0054] In a single-shaft bearing wind turbine gearbox, the main shaft bearing and support assembly bear the loads of the entire transmission chain in all directions. In existing structures, the gearbox's torque arm and flexible pin are typically fitted with an interference fit. When the axial clearance of the main shaft bearing in the transmission chain is too large or fails, the gearbox will be subjected to axial forces, making the flexible pin prone to axial movement. Moreover, when the transmission chain deforms under load, the different distances from the two ends of the flexible pin to the center of the main shaft bearing result in uneven forces on both sides of the flexible pin, causing it to slowly move towards the motor side. With the accumulation of alternating loads, the movement distance of the flexible pin gradually increases, eventually failing to provide effective support for the gearbox, directly affecting its normal operation, and even leading to serious consequences such as gearbox detachment.
[0055] Therefore, there is an urgent need for a gearbox support mechanism and transmission device to solve the above-mentioned technical problems.
[0056] like Figures 1-7 As shown, this embodiment provides a gearbox support mechanism, which is disposed between the main bearing 100 and the motor 200. The gearbox support mechanism includes a support base 1, a torque arm 2, a connecting pin 3, and an elastic pad 4. The support base 1 has an installation space, and both ends of the torque arm 2 are located within the installation space. The connecting pin 3 passes through the torque arm 2 and the support base 1. The end of the connecting pin 3 near the main bearing 100 is the first end 31, and the end of the connecting pin 3 near the motor 200 is the second end 32. The elastic pad 4 is arranged around the outer peripheral wall of the connecting pin 3 and includes a first washer ring 41 and a second washer ring 42. The first washer ring 41 is sandwiched between the support base 1 and the first end 31, and the second washer ring 42 is sandwiched between the support base 1 and the second end 32. The first washer ring 41 and the second washer ring 42 have the same width along their own axial direction but different radial stiffness; or, the first washer ring 41 and the second washer ring 42 have different widths along their own axial direction but the same radial stiffness.
[0057] In this embodiment, both ends of the torque arm 2 are located within the mounting space of the support base 1. The connecting pin 3 passes through the torque arm 2 and the support base 1, so that the torque arm 2 is connected to the support base 1 through the connecting pin 3, thereby improving the connection strength and stability of the overall structure. The end of the connecting pin 3 near the main bearing 100 is the first end 31, and the end of the connecting pin 3 near the motor 200 is the second end 32. The elastic pad 4 is arranged around the outer peripheral wall of the connecting pin 3, including a first pad ring 41 and a second pad ring 42. By the first pad ring 41 being sandwiched between the support base 1 and the first end 31, and the second pad ring 42 being sandwiched between the support base 1 and the second end 32, the two ends of the connecting pin 3 can be independently elastically supported. By setting the first pad ring 41 and the second pad ring 42 to have the same width along their own axial direction and different radial stiffness; or, the first pad ring 41 and the second pad ring 42 to have different widths along their own axial direction and the same radial stiffness, the force difference at both ends of the connecting pin 3 is balanced, and the connecting pin 3 is prevented from shifting due to transmission chain deformation and the accumulation of alternating loads. With the above-described configuration, the gearbox support mechanism of this embodiment can improve the smoothness and safety of gearbox operation.
[0058] It should be noted that in this embodiment, the two ends of the connecting pin 3 are respectively inserted into the support base and are respectively configured as the first end 31 and the second end 32.
[0059] The specific structure of the gearbox support mechanism is described below:
[0060] Specifically, such as Figures 1-7 As shown, the radial stiffness of the second washer 42 is determined according to the following formula: if W1 = W2,
[0061] In the formula:
[0062] W1 is the width of the first washer 41 along its own axial direction, in mm;
[0063] W2 is the width of the second washer 42 along its own axial direction, in mm;
[0064] K1 is the radial stiffness of the first washer ring 41, in kN / mm;
[0065] K2 is the radial stiffness of the second washer ring 42, in kN / mm;
[0066] L1 is the distance from the center of the first washer 41 along its own axis to the center of the main bearing 100 along its own axis, in mm;
[0067] L2 is the distance from the center of the second washer 42 along its own axis to the center of the main bearing 100 along its own axis, in mm.
[0068] Understandably, the radial stiffness of the second washer 42 can be accurately calculated using the above formula and parameters, thereby achieving a reasonable configuration of the first washer 41 and the second washer 42 on both sides of the torque arm 2. This configuration effectively balances the force difference at both ends of the connecting pin 3, preventing axial movement of the connecting pin 3, ensuring the stability of the gearbox support mechanism, and thus improving the operational reliability of the gearbox and avoiding failures caused by support failure.
[0069] Specifically, the width of the second washer 42 along its own axial direction is determined according to the following formula: if K1 = K2,
[0070] In the formula:
[0071] W1 is the width of the first washer 41 along its own axial direction, in mm;
[0072] W2 is the width of the second washer 42 along its own axial direction, in mm;
[0073] K1 is the radial stiffness of the first washer ring 41, in kN / mm;
[0074] K2 is the radial stiffness of the second washer ring 42, in kN / mm;
[0075] L1 is the distance from the center of the first washer 41 along its own axis to the center of the main bearing 100 along its own axis, in mm;
[0076] L2 is the distance from the center of the second washer 42 along its own axis to the center of the main bearing 100 along its own axis, in mm.
[0077] Understandably, the above formula and parameters allow for the precise calculation of the width of the second washer 42 along its own axial direction. This ensures that, with the first washer 41 and the second washer 42 having the same radial stiffness, the width of the second washer 42 along its own axial direction can be reasonably adjusted, thereby further optimizing the force balance of the washer rings on both sides of the torque arm 2. This configuration not only improves the stability of the gearbox's support mechanism but also avoids localized stress concentration caused by mismatched washer ring widths, extending the service life of the washer rings and ultimately improving the gearbox's operating efficiency and reliability.
[0078] Specifically, the first washer 41 and / or the second washer 42 are provided with annular grooves 421 along their circumference, which can effectively distribute the load transmitted by the connecting pin 3 and avoid excessive damage to the first washer 41 and / or the second washer 42 caused by concentrated stress. Moreover, multiple annular grooves 421 are provided, and the multiple annular grooves 421 are spaced apart along the axial direction of the first washer 41 and / or the second washer 42, so that the first washer 41 and / or the second washer 42 can better adapt to deformation when subjected to force, thereby improving the elasticity and buffering performance of the washer and further reducing the risk of axial movement of the elastic pin.
[0079] More specifically, the width b of the annular groove 421 is 10-20 mm, which can ensure the overall structural strength of the first washer ring 41 and / or the second washer ring 42, and distribute the load and reduce stress concentration.
[0080] In this embodiment, the width b of the annular groove 421 is 10 mm. In other embodiments, the width b of the annular groove 421 can be 15 mm or 20 mm; the width of the annular groove 421 is not limited here.
[0081] More specifically, the number of annular grooves 421 is 8 to 10, which can optimize the load distribution effect, so that the first pad ring 41 and / or the second pad ring 42 can distribute the stress more evenly when under force, thereby improving the buffering performance of the overall structure.
[0082] In this embodiment, the second washer ring 42 is provided with eight annular grooves 421, which are spaced apart along the axial direction of the second washer ring 42. In other embodiments, both the first washer ring 41 and the second washer ring 42 are provided with ten annular grooves 421; the number of annular grooves 421 is not limited here.
[0083] Specifically, the first washer ring 41 and / or the second washer ring 42 include at least one washer block 411, allowing operators to flexibly adjust the number of washer blocks 411 according to actual needs, thereby better accommodating connecting pins 3 of different diameters. Multiple washer blocks 411 are arranged to form a ring structure.
[0084] The pad 411 can be set to one, two or three, and the specific number of pads 411 is not limited here.
[0085] More specifically, in this embodiment, the pad 411 is a semi-cylindrical structure, with its inner surface tightly fitted to the connecting pin 3, effectively transferring loads and providing stable support. In other embodiments, the pad 411 is a rectangular block structure. The rectangular block structure increases the contact area between the pad 411 and the connecting pin 3 to improve support stability, and is also easier to process and install, improving work efficiency. The specific structure of the pad 411 is not limited here, as long as it achieves the aforementioned functions.
[0086] Specifically, the support base 1 includes multiple support plates 11, with each pair of support plates 11 parallel to each other and spaced apart as a group. At least two groups of support plates 11 are spaced apart along the length of the torque arm 2. The end of the torque arm 2 is located between each group of support plates 11, so that the support base 1 can better distribute the load transmitted by the torque arm 2, further improving the reliability of the gearbox support mechanism, which is conducive to the normal operation of the gearbox.
[0087] In each set of support plates 11, an installation space is formed between the two support plates 11. The installation space is used to assemble the torque arm 2 so as to facilitate quick installation.
[0088] More specifically, there are multiple connecting pins 3, which are inserted one-to-one into multiple sets of support plates 11. The end of the torque arm 2 is connected to the support plate 11 through the connecting pins 3, which can effectively improve the connection strength and stability between the torque arm 2 and the support seat 1, and ensure the normal operation of the gearbox.
[0089] This embodiment also provides a transmission device, which includes a gearbox and a support mechanism for the gearbox. The support mechanism for the gearbox is connected to the input shaft of the gearbox, so that the input shaft of the gearbox can obtain more stable and reliable support, thereby improving the smoothness and safety of the transmission device during operation.
[0090] The transmission device in this embodiment includes, but is not limited to, wind power transmission chains, industrial transmission systems, or ship propulsion systems. Those skilled in the art are aware of the specific structure and working principle of the above-mentioned devices, and will not elaborate further here.
[0091] This embodiment also provides a transmission chain, which includes a generator 200 and the aforementioned transmission device. The output end of the transmission device is connected to the rotor of the generator 200, which not only improves the smoothness of the transmission chain operation, but also avoids transmission chain failure caused by gearbox support failure, further enhancing the overall structural reliability and safety.
[0092] Specifically, in the transmission chain, the blades are mounted on the main shaft via a hub. The main shaft is mounted on the main bearing 100 of the frame and connected to the first-stage rotating frame of the gearbox, thereby transmitting power to the first-stage rotating frame of the gearbox. The first-stage rotating frame passes through the through hole of the torque arm 2 and is connected to the second-stage rotating frame via the first-stage sun gear. The second-stage rotating frame is connected to the high-speed stage large wheel via the second-stage sun gear. The high-speed stage large wheel is connected to the output shaft of the gearbox via gears to achieve power transmission. The output shaft of the gearbox is used to connect to the rotor of the generator 200, thereby realizing the power generation operation of the generator 200.
[0093] 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 support mechanism of a gear box, provided between a main bearing (100) and a motor (200), characterized in that, The gearbox support mechanism includes: Support base (1), with installation space; Torque arm (2), the two ends of which are located within the mounting space; A connecting pin (3) is inserted between the torque arm (2) and the support seat (1). The end of the connecting pin (3) near the main bearing (100) is the first end (31), and the end of the connecting pin (3) near the motor (200) is the second end (32). An elastic pad (4) is arranged around the outer peripheral wall of the connecting pin (3), including a first pad ring (41) and a second pad ring (42). The first pad ring (41) is sandwiched between the support base (1) and the first end (31), and the second pad ring (42) is sandwiched between the support base (1) and the second end (32). The first washer (41) and the second washer (42) have the same width along their own axial direction but different radial stiffness; or, the first washer (41) and the second washer (42) have different widths along their own axial direction but the same radial stiffness.
2. The support mechanism for a gear case according to claim 1, characterized by, The radial stiffness of the second grommet (42) is determined according to the following formula: if W1 = W2, In the formula: W1 is the width of the first washer (41) along its own axial direction, in mm; W2 is the width of the second washer (42) along its own axial direction, in mm; K1 is the radial stiffness of the first washer ring (41), in kN / mm; K2 is the radial stiffness of the second washer ring (42), in kN / mm; L1 is the distance from the center of the first washer (41) along its own axis to the center of the main bearing (100) along its own axis, in mm; L2 is the distance from the center of the second washer (42) along its own axis to the center of the main bearing (100) along its own axis, in mm.
3. The support mechanism for a gear case according to claim 1, wherein The second grommet (42) is determined along its own axial width according to the following formula: if K1= K2, In the formula: W1 is the width of the first washer (41) along its own axial direction, in mm; W2 is the width of the second washer (42) along its own axial direction, in mm; K1 is the radial stiffness of the first washer ring (41), in kN / mm; K2 is the radial stiffness of the second washer ring (42), in kN / mm; L1 is the distance from the center of the first washer (41) along its own axis to the center of the main bearing (100) along its own axis, in mm; L2 is the distance from the center of the second washer (42) along its own axis to the center of the main bearing (100) along its own axis, in mm.
4. The support mechanism for a gear case according to claim 1, characterized by, The first washer (41) and / or the second washer (42) are provided with annular grooves (421) along their own circumferential direction. There are multiple annular grooves (421), and the multiple annular grooves (421) are spaced apart along their own axial direction.
5. The support mechanism for a gear case of claim 4, wherein, The width b of the annular groove (421) is 10-20 mm.
6. The support mechanism for a gear case according to claim 4, wherein The number of annular grooves (421) is 8 to 10.
7. The support mechanism for a gear case according to claim 1, wherein The first pad ring (41) and / or the second pad ring (42) include at least one pad block (411), and a plurality of said pad blocks (411) are arranged to form a ring structure.
8. The support mechanism for a gear case of claim 1, wherein, The support base (1) includes multiple support plates (11), each pair of support plates (11) are parallel to each other and spaced apart as a group, and at least two groups of support plates (11) are spaced apart along the length direction of the torque arm (2), with the end of the torque arm (2) located between each group of support plates (11).
9. The support mechanism for a gear case of claim 8, wherein, The connecting pins (3) are provided in multiple ways, and the multiple connecting pins (3) are correspondingly inserted into multiple sets of support plates (11). The end of the torque arm (2) is connected to the support plate (11) through the connecting pins (3).
10. Transmission device, characterized in that It includes a gearbox and a support mechanism for the gearbox as described in any one of claims 1-9, wherein the support mechanism for the gearbox is connected to the input shaft of the gearbox.