Box body sealing structure of gearbox of wind generating set
By employing a combination of double-layer rubber gaskets, silicone sealant, and labyrinth sealing rings in the gearbox of wind turbine generators, along with a compensation mechanism, the aging and leakage problems of the gearbox sealing structure were solved, achieving stable sealing performance and safety.
Patent Information
- Application Number
- CN202520348041.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-28
AI Technical Summary
The sealing structure of existing wind turbine gearboxes is prone to aging and wear after long-term use, resulting in a decline in sealing performance. In addition, labyrinth seals have poor sealing effect on lubricating oil and are prone to leakage.
It adopts a combination structure of double-layer rubber sealing gasket, silicone sealant and labyrinth sealing ring, and ensures tight fit between the moving ring and the stationary ring through the compensation mechanism. The axial movement of the moving ring is maintained by the compensation spring and the limit rod to prevent radial displacement. Combined with the weather resistance of the silicone sealant, a long-lasting sealing effect is achieved.
It effectively prevents media leakage, maintains the stability and reliability of sealing performance, avoids environmental pollution and resource waste, and ensures equipment safety.
Smart Images
Figure CN223725344U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to mechanical engineering technical field especially is related to a wind generating set gear box body sealing structure. BACKGROUND
[0002] Under the big trend of global energy structure accelerates to the transformation of clean energy, wind power generation becomes the important development direction of energy field with its clean, renewable advantages, and wind generating set as the core equipment of wind power generation, its performance directly determines the power generation efficiency and stability, and the gear box is one of the key components in the wind generating set, with the continuous development of wind power generation technology, the single machine capacity gradually increases, and higher requirements are put forward to the carrying capacity, transmission efficiency and reliability of the gear box, in order to meet these demands, the gear box technology has experienced a series of innovation and improvement.
[0003] The sealing structure of the gear box body of the wind generating set mainly adopts the traditional O-shaped sealing ring, oil seal and labyrinth sealing mode to seal, these sealing modes can meet the sealing requirements of the gear box to a certain extent, but there are still some deficiencies in actual application, the O-shaped sealing ring and oil seal are prone to aging and wear after long-term use, which leads to the decline of sealing performance, although the labyrinth seal can effectively block the invasion of dust and moisture, but the sealing effect of lubricating oil is relatively poor, and leakage phenomenon is prone to occur.
[0004] Therefore, it is urgent to provide a wind generating set gear box body sealing structure to solve the above problems. UTILITY MODEL CONTENTS
[0005] The utility model wants to overcome the technical problems of the prior art, and provides a wind generating set gear box body sealing structure.
[0006] To solve the above technical problems, one technical scheme of the utility model is provided: a wind generating set gear box body sealing structure is provided, which comprises an upper body and a lower body, the outer walls of the upper body and the lower body are fixedly connected with flange edges, a flange pad is installed between the two flange edges, and a plurality of fixing bolts are rotatably connected between the two flange edges and the flange pad.
[0007] Sealing grooves are formed in the inner parts of the upper body and the lower body close to the flange edges, double-layer rubber sealing pads are fixedly connected in the inner parts of the two sealing grooves, a gear set is installed in the inner parts of the upper body and the lower body, input shafts and output shafts are installed on the two sides of the gear set respectively, two compensation mechanisms are installed in the inner parts of the upper body and the lower body, and two labyrinth sealing rings are installed in the inner parts of the upper body and the lower body.
[0008] The utility model further sets up: the sealing groove and double -layer rubber sealing pad between fill with silicone sealant.
[0009] Through the above technical scheme, the silicone sealant has excellent weather resistance, can maintain good sealing performance in long-term use process, and prolongs the service life of the sealing system.
[0010] The utility model further sets up: the compensation mechanism includes the installation ring of installation in the inside of upper and lower body, the inside rotation of installation ring is connected with the rotating block, a plurality of installation holes are seted up in the inside of rotating block, a plurality of limiting rings corresponding with installation hole are fixedly connected on the one side of rotating block, a plurality of compensation springs are installed in the inside of a plurality of installation holes, another end of a plurality of compensation springs is all fixedly connected with push block, a plurality of limit rods are fixedly connected on the one side of rotating block, the dynamic ring is installed on the one side of rotating block, and the inside of upper and lower body is installed with static ring.
[0011] Through the above technical scheme, since the inner wall of the dynamic ring is connected with the input shaft, when the input shaft rotates, the dynamic ring will be driven to rotate synchronously, and under the long-term operation of the input shaft, the axial gap between the dynamic ring and the static ring changes, when the gap increases, the compensation spring will be elongated, and the dynamic ring is moved to the static ring direction by the push block, the gap is reduced, the dynamic ring and the static ring are re-tightly attached, when the push block moves, the limiting ring limits the push block, ensures that the push block can move along the axial direction, and the multiple limit rods limit and guide the dynamic ring, which can prevent the dynamic ring from radial deviation or rotation during movement, ensure that the dynamic ring can only move along the axial direction, and ensure that the sealing surface between the dynamic ring and the static ring always maintains correct relative position, and ensure the stability and reliability of the sealing performance.
[0012] The utility model further sets up: the installation hole is evenly distributed in the inside of rotating block along the circumferential direction.
[0013] Through the above technical scheme, when the installation hole is evenly distributed along the circumferential direction, the force exerted on the dynamic ring by each compensation spring is also evenly distributed, which makes the dynamic ring can receive balanced thrust in the axial direction, avoids inclination or deviation due to uneven force.
[0014] The utility model further sets up: the outer wall of push block is attached to the inner wall of corresponding limiting ring.
[0015] Through the above technical scheme, the push block can move linearly along the inner wall of the limiting ring during movement, and the movement trajectory is more accurate.
[0016] The utility model further sets up: the inside of dynamic ring is seted up with the through -hole corresponding with limit rod, and the inner side of dynamic ring is in contact with push block.
[0017] Through the technical scheme, the limiting rod cooperates with the through hole on the dynamic ring to limit the movement track of the dynamic ring, so that the dynamic ring can only move along the direction determined by the limiting rod, the accurate axial movement of the dynamic ring under the action of the compensation mechanism is ensured, the radial deviation or shaking of the dynamic ring is prevented, the dynamic ring and the static ring can keep a good centering state, and stable sealing performance is maintained.
[0018] The utility model further sets up: the inner wall of dynamic ring is contacted with input shaft outer wall, and one side of dynamic ring is pasted with static ring.
[0019] Through the technical scheme, the accurate positioning reference is provided for the dynamic ring, the dynamic ring can keep in the correct axial and radial position, the deviation or shaking of the dynamic ring in the running process is prevented, the dynamic ring and the static ring are pasted to form a sealing surface, the medium in the equipment is prevented from leaking, the medium in the equipment is ensured to flow in the specified channel and space, the medium is prevented from leaking to the external environment, environmental pollution, resource waste and the safety threat to equipment and personnel are avoided.
[0020] The utility model has the advantages that:
[0021] 1. The utility model discloses a compensation mechanism, when the equipment runs, due to temperature change, pressure fluctuation, component wear and other factors, the sealing gap can change, the dynamic ring can be adjusted in position relative to the static ring under the action of the compensation mechanism, automatically compensates these gap changes, always keeps good sealing effect, ensures the stability and reliability of sealing performance and the medium in the device does not leak.
[0022] 2. The utility model discloses a sealing groove in the inside of the combination, fills silicone sealant in the sealing groove, and installs the labyrinth seal ring in the inside of the combination, through multiple means, can guarantee that the pollution of outside does not enter the inside of the device after these joints, guarantees the sealing performance of the device. DRAWINGS
[0023] Figure 1 It is the perspective view of the utility model;
[0024] Figure 2 It is the front view of the utility model;
[0025] Figure 3 It is the inside structure schematic view of the upper combination of the utility model;
[0026] Figure 4 It is the compensation mechanism schematic view of the utility model;
[0027] Figure 5 It is the inside mechanism schematic view of the compensation mechanism of the utility model.
[0028] In the figure: 1, the upper body; 2, the lower body; 3, the flange edge; 4, the flange pad; 5, the fixing bolt; 6, the sealing groove; 7, the double-layer rubber sealing pad; 8, the gear set; 9, the input shaft; 10, the output shaft; 11, the compensation mechanism; 1101, the mounting ring; 1102, the rotating block; 1103, the mounting hole; 1104, the limiting ring; 1105, the compensation spring; 1106, the push block; 1107, the limiting rod; 1108, the moving ring; 1109, the stationary ring; 12, the labyrinth seal ring. DETAILED DESCRIPTION
[0029] The advantages and features of the present application will be more apparent from the following detailed description of preferred embodiments of the present application, taken in conjunction with the accompanying drawings, in which:
[0030] Please refer to Figure 1 - Figure 3 A wind turbine gearbox body sealing structure, comprising an upper body 1 and a lower body 2, the outer walls of the upper body 1 and the lower body 2 are fixedly connected with flange edges 3, flange pads 4 are installed between the two flange edges 3, a plurality of fixing bolts 5 are rotatably connected between the two flange edges 3 and the flange pads 4, sealing grooves 6 are formed in the interiors of the upper body 1 and the lower body 2 near the flange edges 3, double-layer rubber sealing pads 7 are fixedly connected in the interiors of the two sealing grooves 6, silicone sealant is filled between the sealing grooves 6 and the double-layer rubber sealing pads 7, the silicone sealant has excellent weather resistance, can maintain good sealing performance during long-term use, and prolongs the service life of the sealing system, a gear set 8 is installed in the interiors of the upper body 1 and the lower body 2, input shafts 9 and output shafts 10 are installed on the two sides of the gear set 8.
[0031] As Figure 4 and Figure 5As shown, the inside of the upper and lower assemblies 1 and 2 is provided with two compensation mechanisms 11, which include mounting rings 1101 mounted inside the upper and lower assemblies 1 and 2, rotating blocks 1102 rotatably connected inside the mounting rings 1101, a plurality of mounting holes 1103 formed in the inside of the rotating blocks 1102 and uniformly distributed in the circumferential direction of the rotating blocks 1102, when the mounting holes 1103 are uniformly distributed in the circumferential direction, the forces exerted by the compensation springs 1105 on the movable rings 1108 are also uniformly distributed, which enables the movable rings 1108 to receive balanced thrust in the axial direction, avoiding tilting or deviation due to uneven force, a plurality of limiting rings 1104 corresponding to the mounting holes 1103 are fixedly connected to one side of the rotating blocks 1102, a plurality of compensation springs 1105 are mounted in the inside of the mounting holes 1103, the other ends of the plurality of compensation springs 1105 are fixedly connected with push blocks 1106, the outer walls of the push blocks 1106 are in sliding contact with the inner walls of the corresponding limiting rings 1104, which can ensure that the push blocks 1106 move linearly along the inner walls of the limiting rings 1104 during movement, making the movement trajectory more accurate, a plurality of limiting rods 1107 are fixedly connected to one side of the rotating blocks 1102, a movable ring 1108 is mounted on one side of the rotating block 1102, a plurality of through holes corresponding to the limiting rods 1107 are formed in the inside of the movable ring 1108, and the inner side of the movable ring 1108 is in contact with the push blocks 1106, the limiting rods 1107 cooperate with the through holes on the movable ring 1108 to limit the movement trajectory of the movable ring 1108, so that it can only move in the direction determined by the limiting rods 1107, ensuring that the movable ring 1108 moves accurately in the axial direction under the action of the compensation mechanism 11 and preventing it from deviating or shaking in the radial direction, ensuring that the movable ring 1108 and the stationary ring 1109 can maintain a good centered state and maintain stable sealing performance, a stationary ring 1109 is mounted inside the upper and lower assemblies 1 and 2, the inner wall of the movable ring 1108 is in contact with the outer wall of the input shaft 9, and one side of the movable ring 1108 is in contact with the stationary ring 1109, which provides an accurate positioning reference for the movable ring 1108, enabling it to maintain the correct axial and radial position and preventing it from deviating or shaking during operation, the movable ring 1108 and the stationary ring 1109 form a sealing surface in contact, preventing the medium in the equipment from leaking, ensuring that the medium inside the equipment flows in the specified channel and space, preventing the medium from leaking to the external environment, avoiding environmental pollution, resource waste and safety threats to equipment and personnel, and two labyrinth seals 12 are mounted inside the upper and lower assemblies 1 and 2.
[0032] As Figure 4 and Figure 5As shown, since the inner wall of the moving ring 1108 is connected with the input shaft 9, when the input shaft 9 rotates, the moving ring 1108 is driven to rotate synchronously, and under the long-time operation of the input shaft 9, the axial gap between the moving ring 1108 and the static ring 1109 changes, when the gap increases, the compensation spring 1105 is elongated, the push block 1106 pushes the moving ring 1108 to move to the direction of the static ring 1109, the gap is reduced, the moving ring 1108 and the static ring 1109 are tightly attached again, when the push block 1106 moves, the limiting ring 1104 limits the push block 1106, so that the push block 1106 can move along the axial direction, and the plurality of limiting rods 1107 limit and guide the moving ring 1108, which can prevent the moving ring 1108 from being radially deviated or rotated during the movement, so that the moving ring 1108 can only move along the axial direction, the sealing surface between the moving ring 1108 and the static ring 1109 can always maintain the correct relative position, and the sealing performance is stable and reliable.
[0033] In use, the staff installs the double-layer rubber sealing gasket 7 and the silicone sealant in the sealing groove 6 first, then installs the device parts into the upper body 1 and the lower body 2 in sequence, and after installation, a plurality of fixing bolts 5 pass through the flange pad 4 and are fixedly connected through the flange edge 3, when the input shaft 9 is driven to rotate by the operation of the external components, the input shaft 9 drives the gear set 8 to work, and the moving ring 1108 is driven to rotate synchronously, when the gap between the moving ring 1108 and the static ring 1109 increases, the compensation spring 1105 is elongated, the push block 1106 pushes the moving ring 1108 to move to the direction of the static ring 1109, the gap is reduced, the moving ring 1108 and the static ring 1109 are tightly attached again, the medium in the equipment is prevented from leaking, the medium in the equipment is ensured to flow in the specified channel and space, the medium is prevented from leaking to the external environment, environmental pollution, resource waste and safety threat to the equipment and personnel are avoided, the sealing groove 6 and the labyrinth seal ring 12 can prevent the external pollution from entering the inside of the device, the compensation mechanism 11 can prevent the medium from leaking to the external environment, and the double measures ensure the sealing property of the device.
[0034] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion according to the utility model specification and the attached drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.
Claims
1. A wind turbine gearbox housing seal structure comprising an upper housing (1) and a lower housing (2), characterized in that: The outer wall of the upper and lower combination (1) and (2) is fixedly connected with flange (3), two flange (3) is installed with flange pad (4), two flange (3) and flange pad (4) are rotatably connected with a plurality of fixed bolts (5); The inside of the upper and lower combination (1) and (2) is provided with a sealing groove (6) near the flange (3), the inside of the two sealing grooves (6) is fixedly connected with double layer rubber sealing pad (7), the inside of the upper and lower combination (1) and (2) is provided with gear set (8), the both sides of the gear set (8) are provided with input shaft (9) and output shaft (10) respectively, the inside of the upper and lower combination (1) and (2) is provided with two compensation mechanisms (11), the inside of the upper and lower combination (1) and (2) is provided with two labyrinth seals (12).
2. A wind turbine gearbox housing seal structure according to claim 1, characterised in that: The sealing groove (6) and double layer rubber sealing pad (7) are filled with silicone sealant.
3. A wind turbine gearbox housing seal structure according to claim 1, characterized in that: The compensation mechanism (11) comprises a mounting ring (1101) mounted in the upper and lower combination (1) and (2), a rotating block (1102) rotatably connected in the mounting ring (1101), a plurality of mounting holes (1103) formed in the rotating block (1102), a plurality of limiting rings (1104) fixedly connected to one side of the rotating block (1102) corresponding to the mounting holes (1103), a plurality of compensation springs (1105) mounted in the mounting holes (1103), a plurality of push blocks (1106) fixedly connected to the other end of the compensation springs (1105), a plurality of limiting rods (1107) fixedly connected to one side of the rotating block (1102), a movable ring (1108) mounted on one side of the rotating block (1102), and a static ring (1109) mounted in the upper and lower combination (1) and (2).
4. A wind turbine gearbox housing seal structure according to claim 3, characterised in that: The mounting holes (1103) are uniformly distributed in the rotating block (1102) along the circumferential direction.
5. A wind turbine gearbox housing seal structure according to claim 3, characterised in that: The outer wall of the push block (1106) is in sliding contact with the inner wall of the corresponding limiting ring (1104).
6. A wind turbine gearbox housing seal structure according to claim 3, characterised in that: The inside of the movable ring (1108) is provided with a through hole corresponding to the limiting rod (1107), and the inner side of the movable ring (1108) is in contact with the push block (1106).
7. A wind turbine gearbox housing seal structure according to claim 6, characterised in that: The inner wall of the movable ring (1108) is in contact with the outer wall of the input shaft (9), and one side of the movable ring (1108) is in contact with the static ring (1109).