Intelligent oil seal and wind power gear box
By integrating vibration, pressure, and temperature sensors into the oil seal, the sealing status can be monitored in real time and alarm information can be sent, thus solving the problem of oil seal leakage under harsh operating conditions and improving the reliability and stability of wind turbine gearboxes.
Patent Information
- Application Number
- CN202522391884.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-11
AI Technical Summary
In existing technologies, oil seals are prone to failure under harsh working conditions such as high speed, high temperature and strong vibration, resulting in lubricating oil leakage. They also lack real-time monitoring capabilities, making predictive maintenance impossible and affecting the reliability and stability of wind turbine gearboxes.
A smart oil seal was designed, comprising a sealing ring, an elastic element, and a monitoring unit. The sealing ring is sleeved on the drive shaft and abuts against the cover. It is equipped with a vibration sensor, a pressure sensor, and a temperature sensor to monitor the sealing status in real time and send alarm information through a wireless transmission module.
It enables real-time monitoring of multiple parameters of the oil seal, improves sealing performance, allows for predictive maintenance, and enhances the operational reliability and stability of the wind turbine gearbox.
Smart Images
Figure CN224932140U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wind power gearbox technology, and in particular to an intelligent oil seal and a wind power gearbox. Background Technology
[0002] Oil seals, also known as internal skeleton oil seals, are a common structure in gearboxes. Oil seals are mostly installed between the drive shaft and the cover, and their main function is to prevent lubricating oil leakage, so as to ensure that the drive shaft of the gearbox operates under good lubrication conditions. At the same time, oil seals can also prevent external impurities from entering the gearbox, thereby ensuring a good operating environment inside the gearbox.
[0003] For gearboxes operating under harsh conditions such as high speed, high temperature, and strong vibration, oil seal failure (such as lip wear, rubber aging, and abnormal wear caused by shaft eccentricity) can easily lead to lubricating oil leakage, resulting in unexpected equipment shutdown and causing serious economic losses to industrial production. Currently, oil seal maintenance generally adopts a passive approach of periodic or reactive replacement, lacking the ability to monitor the actual operating status of the oil seal in real time, thus failing to achieve predictive maintenance based on the real-time operating status of the oil seal. Utility Model Content
[0004] The purpose of this invention is to provide an intelligent oil seal and wind turbine gearbox, which can perform multi-parameter, real-time status monitoring of the oil seal to improve the reliability and stability of wind turbine gearbox operation.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] Intelligent oil seals include:
[0007] A sealing ring body, wherein the sealing ring body is sleeved on the drive shaft and the outer peripheral surface of the sealing ring body abuts against the transparent cover;
[0008] An elastic element is disposed on the sealing ring body and configured to apply an elastic force to the sealing ring body so that the inner circumferential surface of the sealing ring body abuts against the drive shaft.
[0009] The monitoring unit includes a vibration sensor, a pressure sensor, and a temperature sensor respectively disposed inside the sealing ring body. The vibration sensor is used to monitor the vibration of the sealing ring body and emit an electrical signal, the pressure sensor is used to monitor the pressure between the drive shaft and the sealing ring body and emit an electrical signal, and the temperature sensor is used to monitor the temperature of the sealing ring body and emit an electrical signal.
[0010] Preferably, the monitoring unit further includes a battery, the sealing ring has an outer surface parallel to the end face of the cover, and a mounting groove is recessed on the outer surface for accommodating the battery. The battery is electrically connected to the vibration sensor, the pressure sensor, and the temperature sensor.
[0011] Preferably, the opening of the mounting slot is provided with a removable cover.
[0012] Preferably, the monitoring unit further includes a wireless transmission module, which is disposed inside the sealing ring. The wireless transmission module is electrically connected to the vibration sensor, the pressure sensor, and the temperature sensor, respectively. The wireless transmission module is used to receive electrical signals and send alarm information.
[0013] Preferably, multiple monitoring units are provided, and the multiple monitoring units are evenly spaced apart.
[0014] Preferably, the sealing ring body includes a first retaining ring, a second retaining ring, and a third retaining ring connected in sequence. The first retaining ring abuts against the inner surface of the cover. The third retaining ring has a main lip and a secondary lip protruding from it. The main lip and the secondary lip are spaced apart along the axial direction of the drive shaft. The third retaining ring is sleeved on the drive shaft, and the main lip and the secondary lip abut against the drive shaft respectively.
[0015] Preferably, the vibration sensor, pressure sensor, and temperature sensor are all disposed on the third retaining ring.
[0016] Preferably, the elastic element is wound around the third retaining ring, and the elastic element is arranged radially opposite to the main lip along the drive shaft.
[0017] Preferably, the pressure sensor is disposed between the main lip and the elastic element.
[0018] A wind turbine gearbox includes a mounting housing, a drive shaft, a through cover, and the aforementioned intelligent oil seal. The through cover is disposed in the mounting housing, the drive shaft rotatably passes through the through cover, and the sealing ring is disposed between the drive shaft and the through cover.
[0019] The beneficial effects of this utility model are as follows:
[0020] The intelligent oil seal provided by this utility model includes a sealing ring, a monitoring unit, and an elastic element. The sealing ring is sleeved on the drive shaft and abuts against the cover. Because the sealing ring is equipped with an elastic element, the elastic element can apply an elastic force to the sealing ring, causing the inner circumferential surface of the sealing ring to abut against the outer wall surface of the drive shaft. Therefore, the sealing ring can form a seal between the drive shaft and the cover, effectively preventing lubricating oil in the housing from leaking through the gap between the drive shaft and the cover, thereby improving the sealing performance of the wind turbine gearbox. Because the sealing ring is internally equipped with a vibration sensor, a pressure sensor, and a temperature sensor, the vibration sensor can monitor the axis of the sealing ring relative to the drive shaft. The vibration caused by the deviation allows for the determination of the alignment between the drive shaft and the sealing ring. The pressure sensor monitors the contact pressure between the drive shaft and the sealing ring to obtain the wear condition of the sealing ring. The temperature sensor monitors the temperature of the sealing ring to obtain the operating temperature of the drive shaft. This intelligent oil seal has a simple structure and is easy to use. It can sense and monitor the wear condition of the sealing ring, the eccentricity between the drive shaft and the sealing ring, and the temperature at the sealing interface in real time. This enables predictive maintenance based on the actual operating status of the intelligent oil seal and the drive shaft, thereby greatly improving the reliability and stability of the intelligent oil seal and the wind turbine gearbox.
[0021] The wind turbine gearbox provided by this utility model includes a mounting housing, a drive shaft, a cover, and the aforementioned intelligent oil seal. The sealing ring of the intelligent oil seal is sandwiched between the cover and the drive shaft, and can monitor multiple parameters such as pressure, temperature, and vibration of the sealing ring and the drive shaft in real time. Therefore, the wind turbine gearbox can obtain accurate and real-time oil seal status, which is conducive to predictive maintenance and greatly improves the reliability and stability of the wind turbine gearbox operation. Attached Figure Description
[0022] Figure 1 This is a cross-sectional view of the intelligent oil seal provided in a specific embodiment of this utility model;
[0023] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;
[0024] Figure 3 This is a schematic diagram of the assembly of the intelligent oil seal, the cover, and the drive shaft provided in a specific embodiment of this utility model.
[0025] In the picture:
[0026] 100 - Drive shaft;
[0027] 200-Transparent lid;
[0028] 1-Sealing ring body; 11-Cover plate; 12-First retaining ring; 13-Second retaining ring; 14-Third retaining ring; 141-Main lip; 142-Secondary lip; 15-Skeleton;
[0029] 2-Elastic element;
[0030] 3-Monitoring unit; 31-Vibration sensor; 32-Pressure sensor; 33-Temperature sensor; 34-Wireless transmission module; 35-Battery. Detailed Implementation
[0031] 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.
[0032] 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.
[0033] 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.
[0034] In the description of this embodiment, the terms "upper," "lower," "right," and "left," 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.
[0035] like Figure 1 and Figure 2As shown, this utility model provides an intelligent oil seal, which includes a sealing ring 1, an elastic element 2, and a monitoring unit 3. The sealing ring 1 is sleeved on the drive shaft 100, and the outer circumferential surface of the sealing ring 1 abuts against the cover 200. The elastic element 2 is disposed on the sealing ring 1 and is configured to apply an elastic force to the sealing ring 1 so that the inner circumferential surface of the sealing ring 1 abuts against the drive shaft 100. The monitoring unit 3 includes a vibration sensor 31, a pressure sensor 32, and a temperature sensor 33 respectively disposed inside the sealing ring 1. The vibration sensor 31 is used to monitor the vibration of the sealing ring 1 and emit an electrical signal, the pressure sensor 32 is used to monitor the pressure between the drive shaft 100 and the sealing ring 1 and emit an electrical signal, and the temperature sensor 33 is used to monitor the temperature of the sealing ring 1 and emit an electrical signal.
[0036] In this embodiment, since the sealing ring 1 is provided with an elastic element 2, the elastic element 2 can apply an elastic force to the sealing ring 1 so that the inner circumferential surface of the sealing ring 1 abuts against the outer wall surface of the drive shaft 100. Therefore, the sealing ring 1 can form a seal between the drive shaft 100 and the cover 200, so as to effectively prevent the lubricating oil in the mounting box from leaking through the gap between the drive shaft 100 and the cover 200, thereby improving the sealing performance of the wind turbine gearbox. Since the sealing ring 1 is provided with a vibration sensor 31, a pressure sensor 32 and a temperature sensor 33, the vibration sensor 31 can monitor the vibration caused by the deviation of the sealing ring 1 from the axis of the drive shaft 100, thereby obtaining the transmission... The alignment of the shaft 100 and the sealing ring 1 is monitored by the pressure sensor 32, which monitors the contact pressure between the drive shaft 100 and the sealing ring 1 to obtain the wear condition of the sealing ring 1. The temperature sensor 33 monitors the temperature of the sealing ring 1 to obtain the operating temperature of the drive shaft 100. This intelligent oil seal has a simple structure and is easy to use. It can sense and monitor the wear condition of the sealing ring 1, the eccentricity between the drive shaft 100 and the sealing ring 1, and the temperature at the sealing interface in real time. This allows for predictive maintenance based on the actual operating status of the intelligent oil seal and the drive shaft 100, thereby greatly improving the reliability and stability of the intelligent oil seal and the wind turbine gearbox.
[0037] Furthermore, such as Figure 2 and Figure 3As shown, the monitoring unit 3 also includes a battery 35. The sealing ring 1 has an outer surface parallel to the end face of the cover 200, and a mounting groove is recessed on the outer surface to accommodate the battery 35. The battery 35 is electrically connected to the vibration sensor 31, the pressure sensor 32, and the temperature sensor 33. Since the opening of the mounting groove is located on the outer surface of the sealing ring 1, the battery 35 can be replaced without removing the sealing ring 1 from between the cover 200 and the drive shaft 100, which greatly facilitates later maintenance. In this embodiment, both the cover 200 and the drive shaft 100 are mounted on the mounting housing of the wind turbine gearbox. The mounting groove is opened on the outer surface of the sealing ring 1 facing the outside of the mounting housing, so the operator can replace the battery 35 in the mounting groove from the outside of the mounting housing.
[0038] like Figure 3 As shown, the opening of the mounting slot is provided with a removable cover plate 11. The cover plate 11 protects the battery 35 in the mounting slot to prevent debris and rainwater from entering the mounting slot and damaging the battery 35. In this embodiment, the sealing ring 1 is made of a skeleton 15 and an outer rubber body. The mounting slot is opened on the rubber body, and a rigid cuboid box is embedded in the mounting slot. The opening of the box is the opening of the mounting slot. The cover plate 11 can be snapped onto the box to seal the entire opening of the mounting slot. When it is necessary to replace the battery 35, the cover plate 11 can be removed to expose the battery 35 in the mounting slot.
[0039] Furthermore, such as Figure 1 and Figure 2 As shown, the monitoring unit 3 also includes a wireless transmission module 34, which is located inside the sealing ring 1. The wireless transmission module 34 is electrically connected to the vibration sensor 31, the pressure sensor 32, and the temperature sensor 33. The wireless transmission module 34 is used to receive electrical signals and send alarm information. The wireless transmission module 34 can collect the electrical signals from the vibration sensor 31, the pressure sensor 32, and the temperature sensor 33, and perform preliminary processing such as filtering and analog-to-digital conversion on the collected electrical signals. Then, the wireless transmission module 34 will compare the processed electrical signals with preset values. If the collected data is not within the range of the preset values, the wireless transmission module 34 will send alarm information to the external control center to alert the staff.
[0040] To improve the accuracy of monitoring the condition of the sealing ring 1, multiple monitoring units 3 are provided, and these units are evenly spaced. Specifically, the number of monitoring units 3 can be set according to actual conditions, as long as the operating status of the sealing ring 1 can be accurately and reliably monitored. In this embodiment, the outer diameter of the drive shaft 100 is greater than 100mm. Each monitoring unit 3 includes a vibration sensor 31, a pressure sensor 32, and a temperature sensor 33. The vibration sensor 31, pressure sensor 32, and temperature sensor 33 in the same monitoring unit 3 are located at the same circumferential position of the sealing ring 1. A total of four monitoring units 3 are provided, and the four monitoring units 3 are evenly distributed in the sealing ring 1. Each monitoring unit 3 can be equipped with its own battery 35, or the four monitoring units 3 can share one battery 35, as long as the battery 35 can supply power to each wireless transmission module 34, vibration sensor 31, pressure sensor 32, and temperature sensor 33. It is understood that if any wireless transmission module 34 in any monitoring unit 3 issues an alarm message, it indicates that there is an abnormal oil seal condition at that location, requiring maintenance by personnel.
[0041] like Figure 1 and Figure 2 As shown, the sealing ring body 1 includes a first retaining ring 12, a second retaining ring 13, and a third retaining ring 14 connected in sequence. The first retaining ring 12 abuts against the inner surface of the cover 200. The third retaining ring 14 has a main lip 141 and a secondary lip 142 protruding from it. The main lip 141 and the secondary lip 142 are spaced apart along the axial direction of the drive shaft 100. The third retaining ring 14 is sleeved on the drive shaft 100, and the main lip 141 and the secondary lip 142 abut against the drive shaft 100 respectively. In this embodiment, the main structure of the intelligent oil seal is the same as that of commonly used oil seals in the art. The first retaining ring 12, the second retaining ring 13, and the third retaining ring 14 are all made of rubber and are integrally vulcanized. The first retaining ring 12 and the second retaining ring 13 have an L-shaped skeleton 15 embedded through them, which supports the sealing ring body 1. The main lip 141 and the secondary lip 142 protrude from the third retaining ring 14 and both press against the drive shaft 100, thereby achieving a sealing effect. The main lip 141 and the secondary lip 142 are also made of rubber and are integrally vulcanized with the third retaining ring 14.
[0042] In this embodiment, in order to further improve the accuracy of monitoring the state of the sealing ring 1, such as... Figure 1 and Figure 2As shown, vibration sensor 31, pressure sensor 32, and temperature sensor 33 are all disposed on the third retaining ring 14. In this embodiment, pressure sensor 32 is used to monitor the contact pressure between the drive shaft 100 and the sealing ring 1. This pressure originates from the clamping force between the third retaining ring 14 and the drive shaft 100. If pressure sensor 32 detects a decrease in pressure, it indicates that the sealing ring 1 is worn. Therefore, pressure sensor 32 is disposed on the third retaining ring 14 to be as close as possible to the drive shaft 100, thereby improving the accuracy and sensitivity of pressure monitoring. Temperature sensor 33 is used to monitor the temperature at the sealing interface between the drive shaft 100 and the sealing ring 1. If temperature sensor 33 detects a temperature increase, it indicates that the sealing ring 1 and the drive shaft 100 are not properly sealed. In case of abnormal friction or excessively high lubricating oil temperature, the temperature sensor 33 is positioned on the third retaining ring 14 to be as close as possible to the sealing interface, thereby improving the accuracy and sensitivity of temperature monitoring. The vibration sensor 31 is used to monitor the vibration of the sealing ring 1 and the transmission shaft 100 caused by axial deviation. This vibration is generated by the transmission shaft 100 and transmitted to the sealing ring 1. If the vibration sensor 31 detects vibration, it indicates that there is an eccentricity between the transmission shaft 100 and the sealing ring 1. Therefore, the vibration sensor 31 is positioned on the third retaining ring 14 to be as close as possible to the transmission shaft 100, thereby improving the accuracy and sensitivity of vibration monitoring.
[0043] Furthermore, the elastic element 2 is wound around the third retaining ring 14, and the elastic element 2 is arranged radially towards the main lip 141 along the drive shaft 100. In this embodiment, the elastic element 2 is a ring spring, which is wound around the third retaining ring 14. The elastic element 2 can apply an elastic force to the third retaining ring 14, and the third retaining ring 14 can contract inward under the action of the elastic force. Since the elastic element 2 is arranged radially towards the main lip 141, the contraction of the third retaining ring 14 can clamp the main lip 141 onto the drive shaft 100, thereby ensuring the sealing effect of the sealing ring body 1.
[0044] To further improve the accuracy and sensitivity of pressure monitoring, such as Figure 1 and Figure 2 As shown, the pressure sensor 32 is disposed between the main lip 141 and the elastic member 2. In this embodiment, the pressure sensor 32 is disposed inside the third retaining ring 14 between the main lip 141 and the elastic member 2, and the pressure sensor 32 can be pressed against the main lip 141 under the elastic force of the elastic member 2.
[0045] This embodiment also provides a wind turbine gearbox, which includes a mounting housing, a drive shaft 100, a cover 200, and the aforementioned intelligent oil seal. The cover 200 is disposed in the mounting housing, the drive shaft 100 rotatably passes through the cover 200, and a sealing ring 1 is disposed between the drive shaft 100 and the cover 200. In this embodiment, the sealing ring 1 of the intelligent oil seal is sandwiched between the cover 200 and the drive shaft 100, enabling real-time monitoring of multiple parameters such as pressure, temperature, and vibration of the sealing ring 1 and the drive shaft 100. Therefore, the wind turbine gearbox can obtain accurate and real-time oil seal status, facilitating predictive maintenance and greatly improving the reliability and stability of the wind turbine gearbox operation.
[0046] 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. An intelligent oil seal, characterized in that, include: A sealing ring (1) is sleeved on the drive shaft (100), and the outer circumferential surface of the sealing ring (1) abuts against the cover (200). An elastic element (2) is disposed on the sealing ring body (1) and is configured to apply an elastic force to the sealing ring body (1) so that the inner circumferential surface of the sealing ring body (1) abuts against the drive shaft (100). The monitoring unit (3) includes a vibration sensor (31), a pressure sensor (32) and a temperature sensor (33) respectively disposed inside the sealing ring (1). The vibration sensor (31) is used to monitor the vibration of the sealing ring (1) and emit an electrical signal. The pressure sensor (32) is used to monitor the pressure between the transmission shaft (100) and the sealing ring (1) and emit an electrical signal. The temperature sensor (33) is used to monitor the temperature of the sealing ring (1) and emit an electrical signal.
2. The intelligent oil seal according to claim 1, characterized in that, The monitoring unit (3) also includes a battery (35). The sealing ring (1) has an outer surface parallel to the end face of the transparent cover (200). A mounting groove is recessed on the outer surface. The mounting groove is used to accommodate the battery (35). The battery (35) is electrically connected to the vibration sensor (31), the pressure sensor (32), and the temperature sensor (33).
3. The intelligent oil seal according to claim 2, characterized in that, The opening of the mounting slot is provided with a removable cover plate (11).
4. The intelligent oil seal according to any one of claims 1-3, characterized in that, The monitoring unit (3) further includes a wireless transmission module (34), which is located inside the sealing ring (1). The wireless transmission module (34) is electrically connected to the vibration sensor (31), the pressure sensor (32), and the temperature sensor (33), respectively. The wireless transmission module (34) is used to receive electrical signals and send alarm information.
5. The intelligent oil seal according to claim 1, characterized in that, The monitoring unit (3) is provided in multiple ways, and the multiple monitoring units (3) are evenly spaced apart.
6. The intelligent oil seal according to claim 1, characterized in that, The sealing ring body (1) includes a first retaining ring (12), a second retaining ring (13), and a third retaining ring (14) connected in sequence. The first retaining ring (12) abuts against the inner surface of the cover (200). The third retaining ring (14) is provided with a main lip (141) and a secondary lip (142). The main lip (141) and the secondary lip (142) are spaced apart along the axial direction of the drive shaft (100). The third retaining ring (14) is sleeved on the drive shaft (100), and the main lip (141) and the secondary lip (142) abut against the drive shaft (100) respectively.
7. The intelligent oil seal according to claim 6, characterized in that, The vibration sensor (31), pressure sensor (32) and temperature sensor (33) are all located on the third retaining ring (14).
8. The intelligent oil seal according to claim 6, characterized in that, The elastic element (2) is wound around the third retaining ring (14), and the elastic element (2) is arranged radially opposite the main lip (141) along the drive shaft (100).
9. The intelligent oil seal according to claim 8, characterized in that, The pressure sensor (32) is disposed between the main lip (141) and the elastic element (2).
10. A wind turbine gearbox, characterized in that, The device includes a mounting housing, a drive shaft (100), a cover (200), and an intelligent oil seal as described in any one of claims 1-9. The cover (200) is disposed in the mounting housing, the drive shaft (100) is rotatably inserted through the cover (200), and the sealing ring (1) is disposed between the drive shaft (100) and the cover (200).