A multi-angle universal joint with position limiting function for wind power transmission

Abstract

The application discloses a wind power transmission limiting multi-angle universal joint and relates to the field of universal joints.The wind power transmission limiting multi-angle universal joint comprises a transmission rod, an axle seat and a cross coupling, a protective cover is arranged on the outer side of the transmission rod, a supporting structure is arranged on the outer wall of the protective cover, a bellows is arranged on the outer wall of the protective cover, and the protective cover is adjusted in angle through the bellows.The protective cover, the clamping ring and the metal rod are arranged, the outer side of the transmission rod can be sealed and protected through the protective cover during use, the pollution of the transmission rod caused by impurities is reduced, the strength of the protective cover is effectively increased through the metal rod, the protective cover is bent due to gravity and impurity accumulation in the middle position, the service life of the protective cover is prolonged, and the end of the protective cover can be clamped and sealed through the clamping ring.

Description

Technical Field

[0001] This invention relates to the field of universal joints, specifically a multi-angle universal joint for wind power transmission with adjustable positioning. Background Technology

[0002] Wind power generation is a clean and renewable energy generation method that converts natural wind energy into electrical energy through wind turbine generators. The core principle is to use wind power to drive the wind turbine blades to rotate, converting wind energy into mechanical rotational kinetic energy. Then, through mechanical transmission and electromagnetic induction, the kinetic energy is further converted into electrical energy, which is finally sent to the power system through substation and grid connection. It is one of the most technologically mature and commercially widely used new energy power generation forms. Universal joints are generally required in the transmission system of wind turbine generators. Their core function is to compensate for angular displacement, axial and radial deviations during the transmission process, and to adapt to the structural characteristics of wind power equipment and complex outdoor operating conditions.

[0003] Existing wind turbines adjust their angle according to wind direction. This causes the drive shaft to offset from the generator main shaft via a universal joint, facilitating power output and reducing motor damage caused by vibrations during operation. Secondly, in existing technologies, wind turbines are typically installed at high altitudes and are exposed to wind and moisture for extended periods, which can lead to corrosion of the universal joint shaft. Therefore, the outer side of the universal joint is usually protected to extend its service life (e.g., Chinese Patent Publication No. [number missing]). CN214331167U discloses a corrosion-resistant drive shaft for a wind turbine gearbox.

[0004] However, existing technologies typically employ dust covers as protective structures, and these dust covers are often corrugated pipe structures. During use, gravity can cause the corrugated pipe to bend in the middle, leading to deformation over time, affecting the sealing effect, and impurities can easily accumulate at the top, reducing the lifespan of the corrugated pipe over time. Secondly, in existing technologies, the angle of the universal joint changes during yaw of wind turbines. This requires elastic buffering through an outer structure. However, existing buffering structures usually only use elastic structures (with polyurethane, etc., as soft constraints: when the wind turbine is impacted by gusts or sudden pitch stops and turns, the elastic buffer absorbs the impact load, slows down the sudden change in the universal joint's yaw angle, prevents the instantaneous yaw angle from exceeding the rated value, and reduces the contact impact of hard limits). However, elastic structures are usually quite stiff and can easily cause the universal joint to jam during yaw. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a multi-angle universal joint for wind power transmission that can limit movement, so as to solve the technical problems of reducing impurity accumulation and facilitating swing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-angle universal joint for wind power transmission, comprising a transmission rod, a bearing seat, and a cross coupling. A protective cover is sleeved on the outer side of the transmission rod, and a support structure is installed on the outer wall of the protective cover. A bellows is also provided on the outer wall of the protective cover, and the angle of the protective cover is adjusted through the bellows. Both ends of the protective cover are fixed to the inner wall of the bearing seat, and a clamping ring is installed on the outer side of the connection position of the protective cover.

[0007] By adopting the above technical solution, the protective cover can be easily installed. After installation, the internal fixing structure supports and limits the protective cover, and the protective cover protects the transmission rod during use.

[0008] The invention is further configured such that the corrugated pipes are distributed on both sides of the protective cover, and multiple sets of metal rods are installed on the inner side of the protective cover. Each set of metal rods has a fixed plug installed at its end. The metal rods are engaged with the inner wall of the bearing seat through the fixed plugs. The inner wall of the protective cover is attached to the outer side of the metal rods. Multiple sets of metal plates are installed between the protective cover and the metal rods.

[0009] Preferably, it can increase the strength of the protective cover and prevent the protective cover from bending.

[0010] The invention is further configured such that an inner sleeve is installed on the inner side of the metal rod, and the inner sleeve has the same inner corrugated pipe at the position of the corrugated pipe. The inner sleeve is attached to the inner wall of the metal rod, and both the protective cover and the inner sleeve have installation openings for easy disassembly.

[0011] Preferably, the inner sleeve provides multiple layers of protection, and the protective cover and inner sleeve can be easily disassembled.

[0012] The present invention is further configured such that the inner wall of the metal rod has multiple sets of slots, the end of the metal sheet is inserted into the inside of the slot and fixedly connected to the metal rod, and the metal rod and the metal sheet constitute an electromagnetic shielding structure.

[0013] Preferably, the metal sheet is conveniently fixed between each group of metal rods and protects the transmission rod.

[0014] The present invention is further configured such that a connecting ring is provided at the middle position of the metal rod, the metal rod is engaged with the connecting ring by a fixed plug, the connecting ring is hollow inside, and the connecting ring is located on the inner middle side of the clamping ring.

[0015] Preferably, it can conveniently limit the movement of the metal rod, thereby improving stability.

[0016] The invention is further configured such that an inner groove is provided on the inner side of the clamping ring, a sealing ring is installed inside the inner groove, the sealing ring is in contact with the outer wall of the protective cover, an ear plate is installed at the end of the clamping ring, and a fixing bolt is installed in the middle of the ear plate, and the ear plate is fixedly connected by the fixing bolt.

[0017] Preferably, the clamping ring is used to secure and limit the protective cover, thereby reducing leakage.

[0018] The invention is further configured such that the outer side of the protective cover is entirely corrugated, a small collar is installed on the outer side of the trough of the corrugated tube, and a large collar is installed on the inner side of the crest of the corrugated tube, and the protective cover is limited by the small collar and the large collar.

[0019] Preferably, the protective cover is designed to be easily bent, and during the bending process, the protective cover is limited and fixed by large and small collars.

[0020] The invention is further configured such that three sets of support cylinders are installed below the protective cover, and each set of support cylinders is installed equidistantly below the protective cover. Two sets are aligned with the cross coupling, and one set is located in the middle position of the transmission rod. The bottom end of the support cylinder located in the middle position is provided with a short slide plate, and the bottom end of this set of support cylinders is slidably connected to the short slide plate. The bottom end of the support cylinder away from the shaft seat is provided with a long slide plate, and the bottom end of this set of support cylinders is also slidably connected to the long slide plate.

[0021] Preferably, the stability of the protective cover is improved, and the support cylinder can move with the movement of the protective cover.

[0022] In summary, the present invention has the following main beneficial effects: 1. The present invention, through the design of a protective cover, clamping ring, and metal rod, can seal and protect the outside of the transmission rod during use. The protective cover can reduce contamination of the transmission rod by impurities. The metal rod can effectively increase the strength of the protective cover and reduce bending of the protective cover due to gravity and impurity accumulation in the middle position, thereby improving the service life of the protective cover. The clamping ring can clamp and seal the end of the protective cover, thereby reducing the possibility of leakage at the end of the protective cover and improving the sealing effect.

[0023] 2. This invention, through the arrangement of metal rods and metal sheets, allows for the placement of metal sheets between each group of metal rods. The flexible metal sheets can be effectively bent and inserted into slots opened on the outer wall of the metal rods for electrical connection. This not only increases the strength of the protective cover and extends its service life, but also forms an electromagnetic shielding cover with the metal rods and metal sheets, effectively shielding the transmission rods from electromagnetic interference generated during fan operation and reducing the electromagnetic interference on the universal joint, thus extending the service life of the universal joint.

[0024] 3. The present invention features an inner and outer sleeve structure, with both the protective cover and the inner sleeve being spliced ​​together. After installation, they can be fixed by bonding through the openings. The openings of the protective cover and the inner sleeve are misaligned, thereby further improving the sealing effect. It also facilitates the disassembly and installation of the protective cover and the inner sleeve, improving the efficiency of use. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the universal joint structure with a protective cover according to the present invention; Figure 3 This is a schematic diagram of the protective cover structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the protective cover of the present invention; Figure 5 This is a schematic diagram of the structure of the metal rod assembly of the present invention; Figure 6 This is a schematic diagram of the metal rod installation structure of the present invention; Figure 7 This is a schematic diagram of the structure of the metal rod and metal sheet of the present invention; Figure 8 This is a schematic diagram of the internal structure of the present invention after installation; Figure 9 This is a schematic diagram of the structure of the clamping ring of the present invention; Figure 10 This is a schematic diagram of the protective cover and support according to the second embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the protective cover frame according to the second embodiment of the present invention; Figure 12 This is a schematic diagram of the support component according to the second embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures: 1. Drive rod; 2. Shaft seat; 3. Cross coupling; 4. Protective cover; 401. Bellows; 402. Small collar; 403. Large collar; 5. Clamping ring; 501. Inner groove; 502. Sealing ring; 503. Ear plate; 6. Metal rod; 601. Fixed plug; 602. Slot; 7. Metal sheet; 8. Inner sleeve; 801. Inner bellows; 9. Connecting ring; 10. Fixing bolt; 11. Support cylinder; 1101. Connecting plate; 1102. Ball bearing; 12. Short slide plate; 13. Long slide plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The embodiments of the present invention will now be described.

[0029] Example 1, please refer to Figures 1 to 9 A wind-powered multi-angle universal joint with adjustable positioning includes a transmission rod 1, a bearing seat 2, and a cross coupling 3. A protective cover 4 is sleeved on the outer side of the transmission rod 1. A support structure is installed on the outer wall of the protective cover 4, and a bellows 401 is also provided on the outer wall of the protective cover 4. The protective cover 4 is angled through the bellows 401. Both ends of the protective cover 4 are fixed to the inner wall of the bearing seat 2. A clamping ring 5 is installed on the outer side of the connection position of the protective cover 4. An inner groove 501 is provided on the inner side of the clamping ring 5. A sealing ring 502 is installed inside the inner groove 501 and fits against the outer wall of the protective cover 4. An ear plate 503 is installed at the end of the clamping ring 5, and a fixing bolt 10 is installed in the middle of the ear plate 503. The ear plate 503 is fixedly connected by the fixing bolt 10, which facilitates the adjustment of the protective cover 4. For fixed installation and improved sealing effect, corrugated pipes 401 are distributed on both sides of the protective cover 4, and multiple sets of metal rods 6 are installed on the inner side of the protective cover 4. Each set of metal rods 6 has a fixed plug 601 installed at its end. The metal rods 6 are engaged with the inner wall of the bearing seat 2 through the fixed plug 601. A connecting ring 9 is provided in the middle of the metal rods 6. The metal rods 6 are engaged with the connecting ring 9 through the fixed plug 601, which facilitates the fixed installation of the metal rods 6. The interior of the connecting ring 9 is hollow to reduce weight, and the connecting ring 9 is located in the middle inner side of the clamping ring 5. The inner wall of the protective cover 4 is attached to the outer side of the metal rods 6. Multiple sets of metal plates 7 are installed between the protective cover 4 and the metal rods 6, which can increase the strength of the protective cover 4 through the metal rods 6 and reduce the bending of the protective cover 4 during use.

[0030] For details regarding the above embodiments, please refer to [link / reference]. Figure 4 and Figure 8 An inner sleeve 8 is installed on the inner side of the metal rod 6. The inner sleeve 8 is located at the position of the bellows 401 and has the same inner bellows 801. The inner sleeve 8 is attached to the inner wall of the metal rod 6. Both the protective cover 4 and the inner sleeve 8 have installation ports for easy disassembly. The openings of the protective cover 4 and the inner sleeve 8 are misaligned to reduce leakage.

[0031] For details regarding the above embodiments, please refer to [link / reference]. Figure 4 and Figure 5 The inner wall of the metal rod 6 has multiple slots 602. The end of the metal sheet 7 is inserted into the slot 602 and fixedly connected to the metal rod 6. The metal sheet 7 is thin and tough, and will not be deformed due to bending. It can return to its original position at any time, so that the metal rod 6 and the metal sheet 7 form an electromagnetic shielding structure, which can effectively shield the cross coupling 3 electromagnetically and reduce the magnetization of the cross coupling 3.

[0032] Example 2, please refer to Figures 10 to 12 The difference from Embodiment 1 lies in the structure of the protective cover 4. Specifically, the outer side of the protective cover 4 is entirely made of bellows 401. Small collars 402 are installed on the outer side of the troughs of the bellows 401, and large collars 403 are installed on the inner side of the crests of the bellows 401. The protective cover 4 is limited by the small collars 402 and the large collars 403. Three sets of support cylinders 11 are installed below the protective cover 4, and each set of support cylinders 11 is equidistantly installed below the protective cover 4. Two sets are aligned with the cross coupling 3, and one set is located in the middle of the transmission rod 1. A short slide plate 12 is provided at the bottom of the support cylinder 11, and a long slide plate 13 is provided at the bottom of the support cylinder 11 away from the shaft seat 2. The support cylinder 11 is slidably connected to the short slide plate 12 and the long slide plate 13, which makes it easy for the protective cover 4 to bend as a whole. During the bending process, the support cylinder 11 can support the protective cover 4. The top of the support cylinder 11 is provided with a connecting plate 1101 and a ball bearing 1102, which makes it easy for the protective cover 4 to rotate. At the same time, the ball bearing 1102 reduces friction and is connected to the support cylinder 11 in a transmission manner, which improves the efficiency of use.

[0033] During use, the protective cover 4 is first installed between the two sets of bearing seats 2, and then fixed and sealed with the fixing components to protect the universal joint. When water or impurities fall on the outside of the protective cover 4, the internal frame and support components of the protective cover can effectively support the protective cover 4, preventing it from bending under gravity and the adhesion of impurities. As the universal joint rotates, the outer protective cover 4 also rotates synchronously, discharging accumulated impurities and preventing damage due to uneven stress caused by prolonged accumulation of impurities. Subsequently, during use, the universal joint... When yaw or angle adjustment is performed, the transmission rod 1 will adjust its angle with the bearing seat 2 through the cross coupling 3. After adjustment, it will cause the protective cover 4 to bend. At this time, the bellows 401 structure opened inside the protective cover 4 facilitates the natural extension of the protective cover 4, increases the bending angle of the protective cover 4, and prevents the protective cover 4 from changing its angle after bending with the universal joint, thus improving the performance and increasing the service life of the protective cover 4. In addition, during the angle adjustment of the universal joint, the support structure can maintain the stability of the universal joint by using elastic buffer, radial support, and soft limit of the dust cover to assist in the sudden change and fluctuation of the swing angle during the bending of the universal joint.

[0034] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A multi-angle universal joint for wind power transmission, comprising a transmission rod (1), a bearing seat (2), and a cross coupling (3), characterized in that: A protective cover (4) is sleeved on the outside of the transmission rod (1). A support structure is installed on the outer wall of the protective cover (4). A corrugated pipe (401) is also provided on the outer wall of the protective cover (4). The angle of the protective cover (4) is adjusted by the corrugated pipe (401). The two ends of the protective cover (4) are fixed on the inner wall of the bearing seat (2). A clamping ring (5) is installed on the outside of the connection position of the protective cover (4).

2. The wind-powered transmission multi-angle universal joint according to claim 1, characterized in that: The corrugated pipes (401) are distributed on both sides of the protective cover (4), and multiple sets of metal rods (6) are installed on the inner side of the protective cover (4). Each set of metal rods (6) has a fixed plug (601) installed at its end. The metal rods (6) are engaged with the inner wall of the bearing seat (2) through the fixed plug (601). The inner wall of the protective cover (4) is attached to the outer side of the metal rods (6). Multiple sets of metal plates (7) are installed between the protective cover (4) and the metal rods (6).

3. A multi-angle universal joint for wind power transmission according to claim 2, characterized in that: An inner sleeve (8) is installed on the inner side of the metal rod (6). The inner sleeve (8) is located at the position of the corrugated pipe (401) and has the same inner corrugated pipe (801). The inner sleeve (8) is attached to the inner wall of the metal rod (6). Both the protective cover (4) and the inner sleeve (8) have installation openings for easy disassembly.

4. A multi-angle universal joint for wind power transmission according to claim 3, characterized in that: The inner wall of the metal rod (6) has multiple slots (602). The end of the metal sheet (7) is inserted into the slot (602) and fixedly connected to the metal rod (6). The metal rod (6) and the metal sheet (7) constitute an electromagnetic shielding structure.

5. A multi-angle universal joint for wind power transmission according to claim 3, characterized in that: A connecting ring (9) is provided in the middle of the metal rod (6). The metal rod (6) is connected to the connecting ring (9) by a fixed plug (601). The connecting ring (9) is hollow inside and is located in the middle inner side of the clamping ring (5).

6. A multi-angle universal joint for wind power transmission according to claim 1, characterized in that: The inner side of the clamping ring (5) is provided with an inner groove (501), and a sealing ring (502) is installed inside the inner groove (501). The sealing ring (502) is in contact with the outer wall of the protective cover (4). An ear plate (503) is installed at the end of the clamping ring (5), and a fixing bolt (10) is installed in the middle of the ear plate (503). The ear plate (503) is fixedly connected by the fixing bolt (10).

7. A multi-angle universal joint for wind power transmission according to claim 1, characterized in that: A small collar (402) is installed on the outer side of the trough position of the corrugated pipe (401), and a large collar (403) is installed on the inner side of the crest position of the corrugated pipe (401). The protective cover (4) is limited by the small collar (402) and the large collar (403).

8. A multi-angle universal joint for wind power transmission according to claim 7, characterized in that: Three sets of support cylinders (11) are installed below the protective cover (4), and each set of support cylinders (11) is installed equidistantly below the protective cover (4). Two sets are aligned with the cross coupling (3), and one set is located in the middle position of the transmission rod (1). The bottom end of the support cylinder (11) located in the middle position is provided with a short slide plate (12). The bottom end of the support cylinder (11) is slidably connected with the short slide plate (12). The bottom end of the support cylinder (11) away from the shaft seat 2 is provided with a long slide plate (13), and the bottom end of the support cylinder (11) is also slidably connected with the long slide plate (13).

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