Magnetic fluid sealing device for low temperature

Abstract

The utility model discloses a low-temperature magnetic fluid sealing device and belongs to the technical field of mechanical engineering sealing. The magnetic fluid sealing device is used for solving the problems of magnet demagnetization and magnetic fluid solidification of a traditional magnetic fluid sealing device in an extremely low-temperature environment. Comprising a magnetic fluid sealing device body and a protective shell arranged outside the magnetic fluid sealing device body in a sleeving mode, a gap is reserved between the magnetic fluid sealing device body and the inner wall of the protective shell, the two ends of an output shaft of the magnetic fluid sealing device body are in sealed connection with the protective shell through sealing bearings, and a heat preservation layer is embedded in the inner wall of the protective shell. A heating layer is arranged on the inner wall of the protective shell around the magnetic fluid sealing device body, a temperature sensor is arranged on the inner wall of the protective shell close to the magnetic fluid sealing device body, and the temperature sensor and the heating layer are connected with a control system. According to the utility model, the working stability in a low-temperature environment can be remarkably improved, and the influence of the external low-temperature environment on the internal magnetic fluid is effectively isolated.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical engineering sealing, and particularly relates to a low-temperature magnetic fluid sealing device. Background Art

[0002] Magnetic fluid sealing devices are widely used in various industrial fields due to their excellent sealing performance. However, in extremely low temperature environments, traditional magnetic fluid sealing devices face problems such as magnet demagnetization and magnetic fluid solidification, which lead to reduced sealing effect or even failure. Therefore, it is particularly important to design a magnetic fluid sealing device that can work stably under low temperature conditions. Utility Model Content

[0003] The utility model aims to provide a low-temperature magnetic fluid sealing device, which is used to solve the problems of magnet demagnetization and magnetic fluid solidification faced by traditional magnetic fluid sealing devices in an extremely low-temperature environment.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a low-temperature magnetic fluid sealing device, including a magnetic fluid sealing device body and a protective shell sleeved outside the magnetic fluid sealing device body, a gap is left between the magnetic fluid sealing device body and the inner wall of the protective shell, both ends of the output shaft of the magnetic fluid sealing device body are sealed and connected to the protective shell through sealing bearings, connecting flanges are provided at both ends of the protective shell, an insulation layer is embedded in the inner wall of the protective shell, a heating layer is provided on the inner wall of the protective shell around the magnetic fluid sealing device body, a temperature sensor is provided on the inner wall of the protective shell close to the surrounding magnetic fluid sealing device body, and the temperature sensor and the heating layer are connected to the control system.

[0005] Furthermore, the heating layer includes a stainless steel grid and a plurality of heating elements, the stainless steel grid is fixedly connected to the inner wall of the protective shell, the plurality of heating elements are evenly distributed on the inner wall of the stainless steel grid through thermal conductive adhesive, and the plurality of heating elements are connected to the control system.

[0006] Furthermore, the thermal insulation layer includes a vacuum insulation layer and multiple layers of aerogel felt, and the aerogel felt is respectively stacked on both sides of the vacuum insulation layer.

[0007] Compared with the prior art, the beneficial effects of the utility model are:

[0008] 1. The utility model can significantly improve the working stability in low temperature environment. By setting a protective shell outside the magnetic fluid sealing device and integrating an efficient insulation layer on the inner wall of the shell, the influence of the external low temperature environment on the internal magnetic fluid is effectively isolated. This design significantly improves the working stability of the device under low temperature conditions and ensures the normal fluidity and sealing performance of the magnetic fluid.

[0009] 2. The utility model can realize intelligent temperature control. The heating layer set on the inner wall of the protective shell is combined with the temperature sensor, and the real-time monitoring and intelligent adjustment of the internal temperature of the device are realized through the control system. This intelligent temperature control strategy not only improves the heating efficiency, but also can accurately adjust the temperature according to actual needs, avoids energy waste, and ensures that the device operates stably within the optimal temperature range.

[0010] 3. The utility model can extend the service life of the equipment. Low temperature environment often has an adverse effect on equipment materials, such as causing embrittlement and shrinkage of materials. The utility model effectively reduces the impact of temperature fluctuations on materials by setting up the insulation layer. At the same time, the intelligent heating system also avoids equipment failures caused by low temperature. Therefore, the device can significantly extend the service life of the equipment and reduce maintenance costs.

[0011] 4. The utility model can improve the safety and reliability of the system. The high-quality sealed bearing and precise sealing structure design ensure the sealing performance of the device under extreme conditions, effectively preventing the occurrence of safety hazards such as leakage. At the same time, the intelligent heating system can detect and respond to temperature anomalies in a timely manner, improving the safety and reliability of the entire system.

[0012] 5. The utility model can save energy and protect the environment. The application of intelligent temperature control strategy makes the heating process more accurate and efficient, reducing unnecessary energy consumption. In addition, the efficient insulation layer design also reduces heat loss and further improves energy utilization efficiency. Therefore, while ensuring the stable operation of the equipment, the device also meets the requirements of modern industry for energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the protective shell.

[0015] The names and reference numerals of the components involved in the above drawings are as follows:

[0016] 1. Magnetic fluid sealing device body; 2. Protective shell; 3. Sealed bearing; 4. Connecting flange; 5. Insulation layer; 6. Heating layer; 7. Vacuum insulation layer; 8. Aerogel felt; 9. Stainless steel grid; 10. Thermal conductive glue; 11. Heating element; 12. Temperature sensor. DETAILED DESCRIPTION

[0017] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] Specific implementation method: Figure 1-2 As shown, this embodiment discloses a low-temperature magnetic fluid sealing device, including a magnetic fluid sealing device body 1 and a protective shell 2 mounted outside the magnetic fluid sealing device body 1, a gap is left between the magnetic fluid sealing device body 1 and the inner wall of the protective shell 2, both ends of the output shaft of the magnetic fluid sealing device body 1 are sealed and connected to the protective shell 2 through sealing bearings 3, connecting flanges 4 are provided at both ends of the protective shell 2, an insulation layer 5 is embedded in the inner wall of the protective shell 2, a heating layer 6 is provided on the inner wall of the protective shell 2 surrounding the magnetic fluid sealing device body 1, a temperature sensor 12 is provided on the inner wall of the protective shell 2 close to the surrounding magnetic fluid sealing device body 1, and the temperature sensor 12 and the heating layer 6 are connected to the control system.

[0019] Furthermore, the heating layer 6 includes a stainless steel grid 9 and a plurality of heating elements 11, the stainless steel grid 9 is fixedly connected to the inner wall of the protective shell 2, the plurality of heating elements 11 are evenly distributed on the inner wall of the stainless steel grid 9 through thermal conductive adhesive 10, and the plurality of heating elements 11 are all connected to the control system.

[0020] Furthermore, the thermal insulation layer 5 includes a vacuum insulation layer 7 and multiple layers of aerogel felt 8 , and the aerogel felt 8 are stacked on both sides of the vacuum insulation layer 7 .

[0021] Component preparation: First, prepare all necessary components including the magnetic fluid sealing device body 1, protective housing 2, sealing bearing 3, connecting flange 4, insulation layer 5, heating layer 6, temperature sensor 12, stainless steel grid 9, heating element 11 and thermal conductive adhesive 10. Ensure that all components meet the design requirements and quality standards.

[0022] Preparation of protective shell 2: A high-strength, corrosion-resistant and low-thermal-conductivity alloy material is selected and made into protective shell 2 through precision machining. The shape and size of protective shell 2 must match the magnetic fluid sealing device body 1 to ensure that the two can fit tightly. Sufficient space is reserved on the inner wall of protective shell 2 to install insulation layer 5 and heating layer 6. At the same time, connecting flanges 4 are machined at both ends of protective shell 2 for connection with other equipment or components.

[0023] Installation of thermal insulation layer 5: Prepare vacuum insulation layer 7, use special equipment to evacuate vacuum insulation layer 7, and seal and store. Ensure that vacuum insulation layer 7 has extremely low thermal conductivity to effectively block heat transfer. Cut multiple layers of aerogel felt 8 into appropriate sizes and stack them on both sides of vacuum insulation layer 7. Aerogel felt 8 further enhances the thermal insulation effect of the entire thermal insulation layer 5 with its excellent thermal insulation performance. Embed the thermal insulation layer 5 as a whole into the inner wall of protective shell 2 to ensure that the thermal insulation layer 5 and protective shell 2 fit tightly without gaps.

[0024] Installation of the heating layer 6: Prepare a stainless steel mesh 9 and securely fix it to the inner wall of the protective housing 2. The stainless steel mesh 9 must have sufficient strength and stability to support the uniform distribution of the heating elements 11. Apply a layer of thermal conductive glue 10 on the inner wall of the stainless steel mesh 9 to ensure good contact between the heating elements 11 and the stainless steel mesh 9. Glue multiple heating elements 11 evenly on the stainless steel mesh 9 according to the preset layout. The number and power of the heating elements 11 must be accurately calculated according to the actual needs of the device to ensure uniformity and efficiency of the heating effect.

[0025] Installation of the temperature sensor 12: Select a suitable position on the inner wall of the protective housing 2 to install the temperature sensor 12. The installation position of the temperature sensor 12 must be able to accurately reflect the temperature inside the device so as to provide accurate temperature data for the control system.

[0026] The temperature sensor 12 is connected to the control system to ensure that the temperature data can be transmitted to the control system for processing in real time.

[0027] Sealing and connection: high-quality sealing bearings 3 are installed at both ends of the magnetic fluid sealing device body 1 to ensure the sealing performance between the magnetic fluid sealing device body 1 and the protective housing 2. Bolts and other fasteners are used to connect the connecting flange 4 of the protective housing to other equipment or components to ensure the stability and sealing of the entire device.

[0028] Debugging and testing: After completing all the above installation steps, debug and test the device. Perform a heating test on the heating layer 6 through the control system, and observe the feedback data of the temperature sensor 12 to ensure that the heating effect is uniform and meets the design requirements. Test the sealing performance of the device to ensure that there is no leakage in a low temperature environment.

[0029] Maintenance and care: Check and maintain the device regularly to ensure the integrity and normal function of each component. Replace and maintain the heating element 11 and the insulation layer 5 as necessary according to actual use to ensure long-term stable operation of the device.

[0030] Working process:

[0031] Initial state: When the device is not started or in standby state, the thermal insulation layer 5 and the vacuum insulation layer 7 in the protective shell 2 work together to isolate the external low temperature environment from the internal magnetic fluid sealing device body 1 to prevent heat loss. The temperature sensor 12 monitors the temperature inside the device in real time and transmits the data to the control system.

[0032] Heating process: When the control system detects that the temperature inside the device is lower than the set value, it will start the heating element 11 in the heating layer 6 to heat the internal magnetic fluid. As the heating process proceeds, the temperature inside the device gradually rises until it reaches the set value. At this time, the control system will automatically adjust the power of the heating element 11 according to the feedback data of the temperature sensor 12 to keep the temperature inside the device stable.

[0033] Through the above specific implementation methods, it can be ensured that the low-temperature magnetic fluid sealing device proposed by the utility model has excellent heat preservation and heating performance in a low-temperature environment, and meets the use requirements under various extreme working conditions.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent conditions of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A low temperature magnetic fluid sealing device, characterized in that: The invention comprises a magnetic fluid sealing device body (1) and a protective shell (2) mounted outside the magnetic fluid sealing device body (1), a gap being left between the magnetic fluid sealing device body (1) and the inner wall of the protective shell (2), both ends of the output shaft of the magnetic fluid sealing device body (1) being sealedly connected to the protective shell (2) via sealing bearings (3), connecting flanges (4) being provided at both ends of the protective shell (2), a heat-insulating layer (5) being embedded in the inner wall of the protective shell (2), and a heat-insulating layer (5) being provided on the inner wall of the protective shell (2) surrounding the magnetic fluid sealing device body (1). A heating layer (6) is provided. A temperature sensor (12) is arranged on the inner wall of the protective shell (2) near the magnetic fluid sealing device body (1). The temperature sensor (12) and the heating layer (6) are connected to a control system. The heating layer (6) comprises a stainless steel grid (9) and a plurality of heating elements (11). The stainless steel grid (9) is fixedly connected to the inner wall of the protective shell (2). The plurality of heating elements (11) are evenly arranged on the inner wall of the stainless steel grid (9) by means of a heat-conducting adhesive (10). The plurality of heating elements (11) are all connected to the control system.

2. A low temperature magnetic fluid sealing device according to claim 1, characterized in that: The thermal insulation layer (5) comprises a vacuum thermal insulation layer (7) and multiple layers of aerogel felt (8), and the aerogel felt (8) are respectively stacked and arranged on both sides of the vacuum thermal insulation layer (7).

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