Intelligent skeleton sealing system
Patent Information
- Application Number
- CN202522347024.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-05
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-05
AI Technical Summary
传统结构由油封橡胶体、加强骨架和自紧螺旋弹簧组成，通过橡胶唇口控制油膜厚度实现密封，目前的骨架密封存在以下问题：状态不可知性：缺乏运行状态监测能力，无法实时掌握密封性能变化，往往在发生泄漏后才进行维护；维护滞后性：唇口磨损、橡胶老化等问题通常通过定期检修发现，无法实现预测性维护；装配敏感性：安装要求高，若与轴心线不垂直会导致润滑剂被排干，加速密封唇磨损
[0013]在本实用新型的智能化骨架密封系统中，骨架密封的箍紧弹簧为记忆合金弹簧，可自适应调整弹簧预紧力，大幅提高密封性和使用寿命，并且配合骨架密封的双唇结构，可使密封泄漏率大幅度降低；其次，该智能化骨架密封系统中设置有用于监测温度、振动、压力及介质泄露量的多组传感器模块，可以方便工作人员获知骨架密封运行时的数据；另外，还可以进一步设置报警器进行报警提醒。本实用新型的智能化骨架密封系统具有自适应性强、高可靠性和易维护性等特性。
Smart Images
Figure CN224836213U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical seal technology, and in particular to an intelligent skeleton sealing system. Background Technology
[0002] The function of a skeleton oil seal is to isolate lubricated components from the external environment during high-speed rotation of a shaft, preventing leakage of the lubricating medium. Modern skeleton oil seals typically consist of a metal skeleton and an elastic sealing body such as NBR, FKM, silicone, or polyurethane, usually employing a double-lip design to achieve both primary sealing and dustproof functions. Traditional structures consist of an oil seal rubber body, a reinforcing skeleton, and a self-tightening helical spring, achieving sealing by controlling the oil film thickness through the rubber lip. Current skeleton seals suffer from the following problems: Uncertainty of status: Lack of operational status monitoring capabilities, making it impossible to monitor changes in sealing performance in real time, often leading to maintenance only after leakage occurs; Lagging maintenance: Problems such as lip wear and rubber aging are usually discovered through periodic inspections, making predictive maintenance impossible; Assembly sensitivity: High installation requirements; if not perpendicular to the shaft centerline, lubricant may be drained, accelerating lip wear. Utility Model Content
[0003] To solve the above problems, this utility model provides an intelligent skeleton sealing system.
[0004] To achieve the above objectives, this utility model adopts the following solution: an intelligent skeleton sealing system, including a sealing base installed on a rotating shaft, a skeleton oil seal installed inside the sealing base, the skeleton oil seal being fitted onto the rotating shaft, the skeleton oil seal including a metal skeleton and a rubber body encasing the metal skeleton, characterized in that: the sealing base is bolted to the sealing cover on the side away from the medium, forming an oil seal mounting cavity, the skeleton oil seal is installed in the oil seal mounting cavity, the rubber body is composed of an inner double lip structure and an outer interface layer, the inner double lip structure including a main lip near the medium side and a dustproof lip away from the medium side, a spring mounting groove is provided at the main lip, a clamping spring is installed in the spring mounting groove, and multiple sets of sensor modules are provided on the skeleton oil seal, including a vibration pressure sensor module installed behind the main lip and located between the metal skeleton and the rubber body, a temperature sensor module installed between the metal skeleton and the outer interface layer, and a leakage detection sensor module installed in front of the dustproof lip and exposed on the surface of the rubber body, the vibration pressure sensor module, the temperature sensor module, and the leakage detection sensor module are respectively connected to a PLC control cabinet.
[0005] Furthermore, the intelligent skeleton sealing system provided by this utility model may also have the following features: the inner double lip structure is nitrile rubber or fluororubber, and the outer interface layer is nitrile rubber.
[0006] Furthermore, the intelligent skeleton sealing system provided by this utility model may also have the following features: the metal skeleton is a stainless steel skeleton.
[0007] Furthermore, the intelligent skeleton sealing system provided by this utility model may also have the following features: the clamping spring is a shape memory alloy spring.
[0008] Furthermore, the intelligent skeleton sealing system provided by this utility model may also have the following features: the vibration and pressure sensor module is integrated with a vibration velocity sensor and a pressure sensor. The vibration velocity sensor is a MEMS accelerometer with a frequency range of 1kHz-10kHz and a resolution of 0.1mg, and the pressure sensor is a pressure sensor with a range of 0-1MPa and a measurement accuracy of ±0.5%FS.
[0009] Furthermore, the intelligent skeleton sealing system provided by this utility model may also have the following features: the leakage detection sensor module is an ultrasonic sensor with a sensing frequency range of 20kHz-100kHz.
[0010] Furthermore, the intelligent skeleton sealing system provided by this utility model may also have the following features: sensor mounting slots for mounting sensor modules are correspondingly provided on the metal skeleton and the rubber body.
[0011] Furthermore, the intelligent skeleton sealing system provided by this utility model may also have the following features: the PLC control cabinet is also connected to an alarm.
[0012] The present invention has the following beneficial effects:
[0013] In the intelligent skeleton sealing system of this invention, the clamping spring of the skeleton seal is a shape memory alloy spring, which can adaptively adjust the spring preload, significantly improving sealing performance and service life. Furthermore, combined with the double-lip structure of the skeleton seal, it can drastically reduce the sealing leakage rate. Secondly, this intelligent skeleton sealing system is equipped with multiple sensor modules for monitoring temperature, vibration, pressure, and media leakage, allowing operators to easily obtain data on the skeleton seal's operation. Additionally, an alarm can be further installed for alerts. The intelligent skeleton sealing system of this invention features strong adaptability, high reliability, and ease of maintenance. Attached Figure Description
[0014] Figure 1 This is a schematic diagram illustrating the working condition of the skeleton oil seal in this embodiment of the present invention;
[0015] Figure 2 This is a schematic diagram of the intelligent skeleton sealing system in an embodiment of this utility model;
[0016] Figure 3 This is a cross-sectional view of the skeleton oil seal and sensor module in an embodiment of this utility model.
[0017] The diagram shows the following markings: 101, skeleton oil seal; 102, sealing base; 103, bolt; 104, sealing gland; 105, rotating shaft; 1, rubber body; 11, inner double lip structure; 11a, main lip; 11b, dustproof lip; 12, outer interface layer; 2, metal skeleton; 3, clamping spring; 4, vibration and pressure sensor module; 5, temperature sensor module; 6, leakage detection sensor module; 7, sensor cable; 8, PLC control cabinet. Detailed Implementation
[0018] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the technical solution of this utility model.
[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing this utility model and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation.
[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.
[0021] See Figures 1 to 3 This embodiment provides an intelligent skeleton sealing system, including a skeleton oil seal 101. The skeleton oil seal 101 is installed inside a sealing base 102 and fitted onto a rotating shaft 105. The sealing base 102 is installed on the rotating shaft, and one side of the sealing base 102 is filled with lubricating oil (medium). The side of the sealing base 102 away from the medium is connected and fixed to a sealing gland 104 by bolts 103. The skeleton oil seal 101 is located in the oil seal cavity formed by the sealing base 102 and the sealing gland 104.
[0022] The skeleton oil seal 101 includes a metal skeleton 2 and a rubber body 1 enclosing the metal skeleton. The rubber body 1 consists of an inner double-lip structure 11 and an outer interface layer 12. The metal skeleton 2, which is stainless steel, is located within the inner double-lip structure 11 rubber body. The inner double-lip structure 11 is made of nitrile rubber or fluororubber, with a temperature resistance range of -20℃ to 300℃. The inner double-lip structure 11 includes a main lip 11a near the medium side and a dustproof lip 11b away from the medium side. The outer interface layer 12 is made of nitrile rubber and serves a protective function, extending the seal's service life.
[0023] The main lip 11a is provided with a spring mounting groove, in which a clamping spring 3 is installed. The clamping spring 3 is a shape memory alloy spring, such as a CuZnAl shape memory alloy spring, a TiNi shape memory alloy spring, etc. The shape memory alloy spring can adaptively adjust the spring preload within a pressure range of 0-5 bar, thereby significantly improving the sealing performance and service life.
[0024] The skeleton oil seal 101 is equipped with multiple sensor modules, including vibration pressure sensor module 4, temperature sensor module 5, and leakage detection sensor module 6.
[0025] The vibration and pressure sensor module 4 is installed behind the main lip 11a, between the metal frame 2 and the rubber body 1. The vibration and pressure sensor module 4 integrates a vibration velocity sensor and a pressure sensor. The vibration velocity sensor is a commercially available MEMS accelerometer with a frequency range of 1kHz-10kHz and a resolution of 0.1mg. The pressure sensor is a commercially available pressure sensor with a range of 0-1MPa and a measurement accuracy of ±0.5%FS.
[0026] The temperature sensor module 5 is installed between the metal frame 2 and the outer interface layer 12. The temperature sensor module 5 uses a commercially available embedded NTC thermistor with a response time of <50m and an accuracy of ±0.5℃.
[0027] The leak detection sensor module 6 is mounted in front of the dustproof lip 11b and exposed on the surface of the rubber body 1. The leak detection sensor module 6 uses a commercially available ultrasonic sensor with a sensing frequency range of 20kHz-100kHz. The ultrasonic sensor detects leaks by utilizing the ultrasonic wave reflection characteristics when liquid flows; when a medium leaks to the location of the ultrasonic sensor, it emits a corresponding sensing signal.
[0028] The metal frame 2 and the rubber body 1 are respectively provided with sensor mounting slots for mounting sensor modules, with a slot depth of 0.5-1.5mm. The vibration pressure sensor module 4, temperature sensor module 5, and leakage detection sensor module 6 all use existing flexible PCB boards (i.e., flexible circuit boards) as substrates. The flexible PCB board can adapt to the deformation of the rubber body during operation. Furthermore, the flexible PCB board is fixed in the sensor mounting slots with epoxy resin adhesive, ensuring that the oil seal will not detach when rotating at high speed (>1000rpm), thus achieving the installation and fixation of the sensor modules.
[0029] Vibration pressure sensor module 4, temperature sensor module 5, and leakage detection sensor module 6 are connected to PLC control cabinet 8 respectively, transmitting the sensing signals to the control cabinet. PLC control cabinet 8 is a control cabinet with an electronic display screen, which displays the sensing data.
[0030] like Figure 2 As shown, in this embodiment, each sensor module is connected to the PLC control cabinet 8 via a wired connection through sensor cable 7. The specific details are as follows: the sensor cable 7 is made of commercially available cable with a silicone sheath, which is resistant to temperatures from -40℃ to 200℃ and has the advantages of being oil-proof and waterproof; the interface of the sensor cable 7 is an RS485 interface, with a maximum signal transmission distance of 120m.
[0031] In this embodiment, a wired connection is used to connect the sensor module to the PLC control cabinet. However, this is not a limitation; in other embodiments, a wireless transmission method can also be used to transmit signals from the sensor module to the PLC control cabinet. When using wireless transmission, the skeleton oil seal 101 is equipped with an SX1278 chip with wireless communication capabilities. The sensor module is connected to the SX1278 chip, a commercially available product with a maximum communication transmission distance of 30m and a power consumption of 50mA. Signals are emitted from the skeleton oil seal side via the SX1278 chip. Simultaneously, the PLC control cabinet also uses a commercially available control cabinet with wireless communication capabilities to receive the wireless signal, such as a Siemens S7 series PLC control cabinet. Compared to the wired method, the wireless method is more flexible and convenient, but the transmission distance is shorter and the cost is higher. Therefore, users can choose a suitable signal transmission method according to their actual needs.
[0032] The intelligent skeleton sealing system in this embodiment operates as follows:
[0033] During the high-speed rotation of the shaft 105, the skeleton oil seal 101, through its double-lip structure, effectively prevents lubricating oil leakage and prevents external dust from entering. While the skeleton oil seal 101 is operating, the vibration and pressure sensor module 4 monitors vibration and pressure and transmits the sensing signals to the PLC control cabinet; the temperature sensor module 5 monitors temperature and transmits the sensing signals to the PLC control cabinet; and the leakage detection sensor module 6 monitors media leakage and transmits the sensing signals to the PLC control cabinet. The PLC control cabinet receives the sensing signals and displays the data on the screen, allowing operators to easily and promptly obtain information about the operating status of the skeleton oil seal. In other embodiments, the PLC control cabinet can also be connected to an alarm system. In the event of media leakage, the alarm system can provide a warning, using conventional technologies such as audible and visual alarms with sirens and flashing lights.
[0034] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.
Claims
1. An intelligent skeleton sealing system, comprising a sealing base mounted on a rotating shaft, wherein a skeleton oil seal is installed within the sealing base, the skeleton oil seal is fitted onto the rotating shaft, and the skeleton oil seal comprises a metal skeleton and a rubber body enclosing the metal skeleton, characterized in that: The sealing base is bolted to the sealing gland on the side away from the medium, forming an oil seal cavity, and the skeleton oil seal is installed in the oil seal cavity. The rubber body consists of an inner double-lip structure and an outer interface layer. The inner double-lip structure includes a main lip near the medium side and a dustproof lip away from the medium side. A spring mounting groove is provided at the main lip, and a clamping spring is installed in the spring mounting groove. The skeleton oil seal is equipped with multiple sensor modules, including a vibration and pressure sensor module installed behind the main lip and located between the metal skeleton and the rubber body; a temperature sensor module installed between the metal skeleton and the outer interface layer; and a leakage detection sensor module installed in front of the dustproof lip and exposed on the surface of the rubber body. The vibration pressure sensor module, the temperature sensor module, and the leakage detection sensor module are respectively connected to the PLC control cabinet.
2. The intelligent skeleton sealing system as described in claim 1, characterized in that: in, The inner double lip structure is made of nitrile rubber or fluororubber, and the outer interface layer is made of nitrile rubber.
3. The intelligent skeleton sealing system as described in claim 1, characterized in that: in, The metal frame is a stainless steel frame.
4. The intelligent skeleton sealing system as described in claim 1, characterized in that: in, The clamping spring is a shape memory alloy spring.
5. The intelligent skeleton sealing system as described in claim 1, characterized in that: in, The vibration and pressure sensor module integrates a vibration velocity sensor and a pressure sensor. The vibration velocity sensor is a MEMS accelerometer with a frequency range of 1kHz-10kHz and a resolution of 0.1mg. The pressure sensor is a pressure sensor with a range of 0-1 MPa and a measurement accuracy of ±0.5% FS.
6. The intelligent skeleton sealing system as described in claim 1, characterized in that: in, The temperature sensor module is an embedded NTC thermistor with a response time of <50m and an accuracy of ±0.5℃.
7. The intelligent skeleton sealing system as described in claim 1, characterized in that: in, The leak detection sensor module is an ultrasonic sensor with a sensing frequency range of 20kHz-100kHz.
8. The intelligent skeleton sealing system as described in claim 1, characterized in that: in, The metal frame and the rubber body are respectively provided with sensor mounting slots for mounting sensor modules.
9. The intelligent skeleton sealing system as described in claim 1, characterized in that: in, The PLC control cabinet is also connected to an alarm.