Adaptive intelligent compensation skeleton oil seal

Abstract

The utility model provides a kind of skeleton oil seal of self-adapting intelligent compensation, is embraced by two L type skeletons staggered, rubber layer is arranged outside the skeleton, first sealing lip, second sealing lip, third sealing lip are respectively arranged in the end of two L type skeletons close to output shaft, fluorine-containing silicone resin microcapsule is arranged in three sealing lips and the rubber matrix of rubber layer, when scratch appears on the lip of sealing lip or rubber layer, capsule breaks and releases repair agent, the sealing property of skeleton oil seal is quickly automatically repaired, improve the durability of skeleton oil seal dynamic seal;Magnetic control shape memory alloy spring and corresponding excitation coil control system and sensor detection accessories are set, realize the real-time adjustment of spring stiffness by using the phase transition characteristics of magnetic control shape memory alloy under the action of magnetic field.Spring is compressed when magnetic field intensity increases, reduces lip mouth to hold tightly force;Spring extends when magnetic field weakens, compensates pressure loss caused by wear.

Description

Technical Field

[0001] This utility model relates to skeleton oil seals, and more particularly to an adaptive intelligent compensation skeleton oil seal. Background Technology

[0002] The connection between the output shaft and the gearbox body requires a skeleton oil seal for dynamic sealing. The sealing lip of the skeleton oil seal rests against the periphery of the output shaft, while the other side rests against the inner wall of the gearbox cavity. A self-tightening spring is positioned inside the sealing lip to maintain the radial force of the oil seal. When the gearbox output shaft rotates, the sealing lip remains against the shaft to achieve dynamic sealing. However, during gearbox operation, relative movement between the skeleton oil seal and the gearbox output shaft causes wear on the sealing lip, reducing the clamping force at the sealing interface and leading to media leakage. Especially with the development of cutting-edge technologies, the operating environments of skeleton oil seals are becoming increasingly extreme. High pressure, high speed, and extreme temperatures accelerate wear and leakage. Therefore, it is necessary to develop an adaptive and intelligently compensating skeleton oil seal to solve these problems. Summary of the Invention

[0003] This invention proposes an adaptive intelligent compensation skeleton oil seal to solve the problem of wear and leakage after long-term use of skeleton oil seals.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An adaptive intelligent compensation skeleton oil seal is installed between the output shaft of a reducer and the inner wall of the reducer cavity. It includes a first L-shaped skeleton, a second L-shaped skeleton, a rubber layer, a first sealing lip, a second sealing lip, and a third sealing lip. Both the first and second L-shaped skeletons include radially extending horizontal support walls and axially extending vertical support walls. The horizontal support walls of both the first and second L-shaped skeletons point towards the output shaft. The vertical support wall of the second L-shaped skeleton is fixedly connected to the horizontal support wall of the first L-shaped skeleton. The rubber layer covers the vertical support arm of the first L-shaped skeleton. The first sealing lip and the second sealing lip are located at the ends of the horizontal support arms of the first L-shaped skeleton, and the third sealing lip is located at the ends of the horizontal support arms of the second L-shaped skeleton. The rubber layer is press-fitted with the inner wall of the reducer cavity, and the first, second, and third sealing lips are press-fitted with the output shaft of the reducer.

[0006] The first sealing lip, the second sealing lip, the third sealing lip, and the rubber layer are all fluorosilicone resin microcapsules dispersed in a rubber matrix;

[0007] The skeleton oil seal also includes a magnetically controlled spring, an excitation coil, a micro sensor, and an external controller. The magnetically controlled spring is installed on the side of the second sealing lip opposite to the output shaft. The excitation coil is wound around the outer periphery of the vertical support arm of the second L-shaped skeleton. The micro sensor is installed inside the second sealing lip. Both the micro sensor and the excitation coil are electrically connected to the external controller. The micro sensor is used to detect changes in the clamping force of the magnetically controlled spring. The external controller is used to receive information from the micro sensor and send control signals to the excitation coil. The magnetically controlled spring expands and contracts radially under the electromagnetic changes of the excitation coil.

[0008] In one possible implementation, along the axial square, the first sealing lip is located on the outermost side of the geared motor, the third sealing lip is located on the innermost side of the geared motor, and the second sealing lip is located between the first sealing lip and the second sealing lip, the second sealing lip being larger than the first sealing lip and the second sealing lip.

[0009] In one possible implementation, the size of the first L-shaped frame is larger than the size of the second L-shaped frame.

[0010] In one possible implementation, the magnetically controlled spring is a magnetically controlled shape memory alloy spring, which contracts when the magnetic field strength increases and extends when the magnetic field strength decreases.

[0011] In one possible implementation, the micro-sensor is a fiber Bragg grating sensor used to monitor changes in the lip stress of the second sealing lip in real time.

[0012] In one possible implementation, the fiber Bragg grating sensor is directly and completely inserted into the interior of the second sealing lip and adjacent to the magnetically controlled spring.

[0013] In one possible implementation, the end of the fiber optic grating sensor is connected to an optical fiber conductor, and an opening is made on the second L-shaped frame to lead the optical fiber conductor out to the outside of the frame oil seal. The optical fiber conductor is connected to the fiber optic grating adjuster and then to the external controller.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] Three sealing lips are provided. The first sealing lip is used to prevent external dust from entering, the second sealing lip plays the main sealing role, and the third sealing lip is used to prevent internal iron powder and lubricating oil from entering. This effectively prevents impurities from the inside and outside of the reducer from entering the oil seal and reduces the wear of the skeleton oil seal.

[0016] Fluorosilicone resin microcapsules are placed in the rubber matrix of the three sealing lips and the rubber layer. When scratches occur on the lip or the rubber layer, the capsules rupture and release the repair agent, which can quickly and automatically repair the sealing performance of the skeleton oil seal and improve the dynamic sealing durability of the skeleton oil seal.

[0017] A magnetically controlled shape memory alloy spring, along with a corresponding excitation coil control system and sensor detection accessories, is installed. Utilizing the phase transition characteristics of the magnetically controlled shape memory alloy under a magnetic field, the spring stiffness is adjusted in real time. When the magnetic field strength increases, the spring compresses, reducing the lip clamping force; when the magnetic field weakens, the spring extends, compensating for pressure loss due to wear. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an adaptive intelligent compensation skeleton oil seal;

[0020] Figure 2 This is a diagram of a magnetically controlled spring clamping force control structure for an adaptive intelligent compensation skeleton oil seal.

[0021] The components include: output shaft 100 of the reducer; cavity 200 of the reducer; first L-shaped frame 1; second L-shaped frame 2; rubber layer 3; first sealing lip 4; second sealing lip 5; third sealing lip 6; magnetic control spring 7; excitation coil 8; micro sensor 9; and external controller 10. Detailed Implementation

[0022] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0024] Please refer to the reference. Figure 1 and Figure 2An adaptive intelligent compensation skeleton oil seal is installed between the output shaft 100 of a reducer and the inner wall of the reducer cavity 200. It includes a first L-shaped skeleton 1, a second L-shaped skeleton 2, a rubber layer 3, a first sealing lip 4, a second sealing lip 5, and a third sealing lip 6. Both the first L-shaped skeleton 1 and the second L-shaped skeleton 2 include radially extending horizontal support walls and axially extending vertical support walls. The horizontal support walls of both the first L-shaped skeleton 1 and the second L-shaped skeleton 2 point towards the output shaft 100. The vertical support wall of the second L-shaped skeleton 2 is fixedly connected to the horizontal support wall of the first L-shaped skeleton 1. The vertical support arm of the first L-shaped skeleton 1 is wrapped with the rubber layer 3. The end of the horizontal support arm of the first L-shaped skeleton 1 is provided with the first sealing lip 4 and the second sealing lip 5, and the end of the horizontal support arm of the second L-shaped skeleton 2 is provided with the third sealing lip 6. The rubber layer 3 is press-fitted with the inner wall of the reducer cavity 200, and the first sealing lip 4, the second sealing lip 5, and the third sealing lip 6 are press-fitted with the output shaft 100 of the reducer. The first sealing lip 4 is used to prevent external dust from entering, the second sealing lip 5 plays the main sealing role, and the third sealing lip 6 is used to prevent internal iron powder and lubricating oil from entering, effectively preventing impurities from the inside and outside of the reducer from entering the oil seal and reducing the wear of the skeleton oil seal.

[0025] The first sealing lip 4, the second sealing lip 5, the third sealing lip 6, and the rubber layer 3 are all fluorinated silicone resin microcapsules dispersed in a rubber matrix. When scratches occur on the lip of the sealing lip or on the rubber layer 3, the capsules rupture and release a repair agent, which can quickly and automatically repair the sealing performance of the skeleton oil seal and improve the durability of the dynamic sealing performance of the skeleton oil seal.

[0026] The skeleton oil seal also includes a magnetically controlled spring 7, an excitation coil 8, a micro sensor 9, and an external controller 10. The magnetically controlled spring 7 is installed on the side of the second sealing lip 5 away from the output shaft 100. The excitation coil 8 is wound around the outer periphery of the vertical support arm of the second L-shaped skeleton 2. The micro sensor 9 is installed inside the second sealing lip 5. Both the micro sensor 9 and the excitation coil 8 are electrically connected to the external controller 10. The micro sensor 9 is used to detect changes in the clamping force of the magnetically controlled spring 7. The external controller 10 is used to receive information from the micro sensor 9 and send control signals to the excitation coil 8. The magnetically controlled spring 7 expands and contracts radially under the electromagnetic changes of the excitation coil 8. By utilizing the phase transition characteristics of the magnetically controlled shape memory alloy under the action of a magnetic field, the spring stiffness can be adjusted in real time. When the magnetic field strength increases, the spring compresses, reducing the clamping force of the lip. When the magnetic field weakens, the spring extends, compensating for the pressure loss caused by wear, thereby achieving adaptive adjustment of the clamping force of the skeleton oil seal.

[0027] In one possible implementation, along the axial square, the first sealing lip 4 is located on the outermost side of the geared motor, the third sealing lip 6 is located on the innermost side of the geared motor, and the second sealing lip 5 is located between the first sealing lip 4 and the second sealing lip 5, with the size of the second sealing lip 5 being larger than that of the first sealing lip 4 and the second sealing lip 5.

[0028] In this invention, the first L-shaped frame 1 and the second L-shaped frame 2 are interlocked and fixed. First, this improves the overall structure of the frame, enhances the support effect of the oil seal, and prevents rapid deformation of the oil seal. Second, a third sealing lip 6 is separately provided at the end of the horizontal support arm of the second L-shaped frame 2, close to the inside of the reducer, specifically to prevent iron filings and oil stains generated by the wear of parts inside the reducer from entering the frame oil seal and causing leakage or aggravating wear. Third, the annular structure formed by the vertical support arm of the second L-shaped frame 2 has space inside and outside, which facilitates the winding of the excitation coil 8. The magnetic control spring 7 is located inside the excitation coil 8, so the change in the current of the excitation coil 8 causes a change in the magnetic field, which can change the extension and contraction state of the magnetic control spring 7, thereby realizing the adaptive compensation adjustment of the clamping force of the frame oil seal.

[0029] In some embodiments, the size of the first L-shaped skeleton 1 is larger than the size of the second L-shaped skeleton 2. The first L-shaped skeleton 1 plays a major supporting role on the outside of the skeleton oil seal, preventing the rubber outer layer from deforming under prolonged operation and affecting the sealing performance of the skeleton oil seal. The second L-shaped skeleton 2 plays an auxiliary supporting role, further enhancing the supporting effect.

[0030] In some embodiments, the magnetically controlled spring 7 is a magnetically controlled shape memory alloy spring. When the magnetic field strength increases, the magnetically controlled spring 7 contracts; when the magnetic field strength decreases, the magnetically controlled spring 7 extends. Under this structure, when the radial clamping force of the skeleton oil seal is insufficient due to factors such as temperature rise, frictional wear, and deformation, the magnetic field strength is increased, and the magnetically controlled spring 7 contracts and decreases radially, thereby increasing the clamping force of the skeleton oil seal and completing radial force compensation.

[0031] In some embodiments, the miniature sensor 9 is a fiber optic grating sensor used to monitor the stress changes at the lip of the second sealing lip 5 in real time. The miniature sensor 9 can detect the stress changes of the sealing lip in real time, thereby detecting whether the radial clamping force of the skeleton oil seal is qualified. Through information interaction and signal transmission, the electromagnetic changes of the excitation coil 8 are controlled by the external controller 10, and the magnetic strength of the magnetic control spring 7 is controlled to adjust the contraction and tension of the magnetic control spring 7, thereby realizing the intelligent adaptive compensation of the skeleton oil seal.

[0032] In some embodiments, the fiber Bragg grating sensor is directly and completely inserted into the interior of the second sealing lip 5 and close to the magnetic spring 7. The fiber Bragg grating sensor is very small in size and has high accuracy. It can monitor the stress change of the lip in real time with an accuracy of ±0.5μm, a response time of less than 10ms, and a compensation of ±1mm. It is suitable for high-frequency vibration scenarios such as speed reducers.

[0033] In some embodiments, the tail end of the fiber optic grating sensor is connected to an optical fiber conductor. An opening is made on the second L-shaped frame 2 to lead the optical fiber conductor out to the outside of the frame oil seal. The optical fiber conductor is connected to the fiber optic grating adjuster and then to the external controller 10. The overall structure is relatively simple, reducing assembly difficulty and packaging cost.

[0034] The skeleton oil seal protected by this utility model enhances the dustproof effect and self-repair capability of the skeleton oil seal by improving the number and structure of the sealing lips. It uses a magnetically controlled shape memory alloy spring in conjunction with an excitation coil, a micro sensor and an external controller to realize stress monitoring of the skeleton oil seal during use and achieve intelligent adaptive compensation.

[0035] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. An adaptive intelligent compensation skeleton oil seal, sealed and installed between the output shaft of a reducer and the inner wall of the reducer cavity, characterized in that: The device includes a first L-shaped frame, a second L-shaped frame, a rubber layer, a first sealing lip, a second sealing lip, and a third sealing lip. Both the first L-shaped frame and the second L-shaped frame include a radially extending horizontal support wall and an axially extending vertical support wall. The horizontal support walls of both the first L-shaped frame and the second L-shaped frame point towards the output shaft. The vertical support wall of the second L-shaped frame is fixedly connected to the horizontal support wall of the first L-shaped frame. The rubber layer covers the vertical support arm of the first L-shaped frame. The horizontal support arm of the first L-shaped frame is provided with a first sealing lip and a second sealing lip. The horizontal support arm of the second L-shaped frame is provided with a third sealing lip. The rubber layer is interference-fitted with the inner wall of the reducer cavity. The first sealing lip, the second sealing lip, and the third sealing lip are interference-fitted with the output shaft of the reducer. The first sealing lip, the second sealing lip, the third sealing lip, and the rubber layer are all fluorosilicone resin microcapsules dispersed in a rubber matrix; The skeleton oil seal also includes a magnetically controlled spring, an excitation coil, a micro sensor, and an external controller. The magnetically controlled spring is installed on the side of the second sealing lip opposite to the output shaft. The excitation coil is wound around the outer periphery of the vertical support arm of the second L-shaped skeleton. The micro sensor is installed inside the second sealing lip. Both the micro sensor and the excitation coil are electrically connected to the external controller. The micro sensor is used to detect changes in the clamping force of the magnetically controlled spring. The external controller is used to receive information from the micro sensor and send control signals to the excitation coil. The magnetically controlled spring expands and contracts radially under the electromagnetic changes of the excitation coil.

2. The adaptive intelligent compensation skeleton oil seal as described in claim 1, characterized in that: Along the axial square, the first sealing lip is located on the outermost side of the geared motor, the third sealing lip is located on the innermost side of the geared motor, and the second sealing lip is located between the first sealing lip and the second sealing lip. The size of the second sealing lip is larger than that of the first sealing lip and the second sealing lip.

3. The adaptive intelligent compensation skeleton oil seal as described in claim 1, characterized in that: The size of the first L-shaped frame is larger than the size of the second L-shaped frame.

4. The adaptive intelligent compensation skeleton oil seal as described in claim 1, characterized in that: The magnetically controlled spring is a magnetically controlled shape memory alloy spring. When the magnetic field strength increases, the magnetically controlled spring contracts; when the magnetic field strength decreases, the magnetically controlled spring extends.

5. The adaptive intelligent compensation skeleton oil seal as described in claim 1, characterized in that: The micro-sensor is a fiber optic grating sensor, used to monitor the stress changes at the lip of the second sealing lip in real time.

6. The adaptive intelligent compensation skeleton oil seal as described in claim 5, characterized in that: The fiber optic grating sensor is directly and completely inserted into the interior of the second sealing lip and is close to the magnetic spring.

7. The adaptive intelligent compensation skeleton oil seal as described in claim 6, characterized in that: The fiber optic grating sensor is connected to an optical fiber conductor at its tail end. An opening is made on the second L-shaped frame to lead the optical fiber conductor out to the outside of the frame oil seal. The optical fiber conductor is connected to the fiber optic grating adjuster and then to the external controller.

Images