Magnetic fluid sealing device

Abstract

The utility model relates to a magnetofluid sealing device which comprises a fixed part and a rotating part, the rotating part is in running fit with the fixed part, and a penetrating area for a shaft body to penetrate through is arranged on the rotating part in a penetrating mode. An accommodating cavity is formed between the rotating part and the fixed part; the fixed part is provided with an airflow channel, and when the rotating part rotates relative to the fixed part, airflow passing through the airflow channel is formed. In the process of matching with the shaft body to rotate, through matching of the airflow channels and interaction between the rotating part and the fixed part, the rotating part is driven to rotate synchronously when the shaft body rotates, so that airflow passes through the airflow channels, the effect of air cooling and heat dissipation is achieved on the inner walls of the airflow channels, and through the position relation, the rotating part can rotate synchronously. Therefore, the heat dissipation effect on the container wall is achieved, the heat dissipation effect on the magnetofluid can be achieved through the heat transfer effect, the phenomenon that the temperature of the magnetofluid is too high in the working process is reduced, and the magnetofluid is protected.

Description

Technical Field

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

[0002] In some mechanical equipment, compared with traditional sealing technologies, magnetic fluid sealing has a better sealing effect and less resistance to rotational connection, resulting in less energy consumption during the equipment transmission process. Magnetic fluid has both the fluidity of a liquid and the magnetism of a solid magnetic material, and the maximum temperature during its operation should not exceed 120 °C. Excessive temperature will cause demagnetization of the magnetic components. In the prior art, at the shaft connection, when the transmission shaft rotates at a high speed for a long time, the accumulated temperature is difficult to dissipate quickly, which is likely to cause the temperature to be too high, leading to a change in the properties of the magnetic fluid. Summary of the Utility Model

[0003] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and title of the application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0004] In view of the following technical problems in the prior art: During the shaft transmission process, the heat generated cannot be dissipated quickly, which is likely to cause the temperature of the magnetic fluid to rise, and then lead to damage to the magnetic fluid. To solve this technical problem, the utility model provides the following technical solutions:

[0005] A magnetic fluid sealing device includes a fixed part and a rotating part, wherein:

[0006] The rotating part is rotationally matched with the fixed part, and a through area for the shaft body to pass through is provided through the rotating part;

[0007] A cavity is formed between the rotating part and the fixed part, which is annularly distributed around the through area, and magnetic fluid is arranged in the cavity;

[0008] An air flow channel is arranged on the fixed part, which is annularly arranged around the cavity. When the rotating part rotates relative to the fixed part, an air flow passing through the air flow channel is formed.

[0009] As a preferred technical solution of the magnetic fluid sealing device, the number of the cavities is multiple and they are axially distributed in sequence along the through area.

[0010] As a preferred technical solution of the magnetic fluid sealing device, wind blades are arranged on the rotating part and are located at the port of the air flow channel.

[0011] As a preferred technical solution of a magnetic fluid sealing device, the wind blade and the rotating part are integrally formed.

[0012] As a preferred technical solution of a magnetic fluid sealing device, a plurality of guide vanes are uniformly arranged in the air flow channel and extend to both ends of the air flow channel.

[0013] As a preferred technical solution of a magnetic fluid sealing device, the guide vanes are arranged in a spiral shape.

[0014] As a preferred technical solution of a magnetic fluid sealing device, the fixing part includes a ring part and a connecting part. The air flow channel is located on the ring part. The rotating part is rotationally matched with the ring part. The connecting part is located at one end of the ring part and is integrally formed with the ring part.

[0015] The beneficial effect of the magnetic fluid sealing device provided by the present utility model is as follows: during the rotation process in cooperation with the shaft body, through the cooperation of the air flow channel and the interaction between the rotating part and the fixing part, when the shaft body rotates, it drives the rotating part to rotate synchronously, thereby forming an air flow passing through the air flow channel, so as to achieve the effect of air-cooling heat dissipation on the inner wall of the air flow channel, and through the positional relationship, achieve the heat dissipation effect on the container wall, and further achieve the heat dissipation effect on the magnetic fluid through the heat transfer effect, so as to reduce the phenomenon of over-high temperature during the operation of the magnetic fluid, thereby playing a protective role for the magnetic fluid. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings. Among them:

[0017] Figure 1 is a perspective view of the present utility model.

[0018] Figure 2 is another perspective view of the present utility model.

[0019] Figure 3 is a cross-sectional view of the present utility model.

[0020] Figure 4 is a disassembled schematic diagram of the rotating part and the fixing part in the present utility model.

[0021] Figure 5 is a three-dimensional cutting schematic diagram of a part of the structure in the present utility model.

[0022] Reference numerals: 1, fixed part; 101, air flow channel; 102, guide vane; 103, ring part; 104, connecting part; 2, rotating part; 201, through area; 202, wind blade; 3, cavity. Detailed implementation mode

[0023] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation mode of the present utility model will be made in conjunction with the accompanying drawings of the specification.

[0024] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar promotions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0025] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation mode of the present utility model. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0026] Furthermore, the present utility model will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, the three-dimensional spatial dimensions of length, width and depth should be included.

[0027] Referring to Figures 1-4 , an embodiment of the present utility model provides a magnetic fluid sealing device, including a fixed part 1 and a rotating part 2. Regarding their positional relationship, specifically:

[0028] The rotating part 2 is rotationally matched with the fixed part 1. The fixed part 1 is used for fixed installation on the device. A through area 201 for the shaft to pass through is provided through the rotating part 2. When the shaft is rotatably installed on the device, it can be fixedly installed in the through area 201 in a penetrating manner;

[0029] A cavity 3 is formed between the rotating part 2 and the fixed part 1, which is annularly distributed around the periphery of the through area 201. A magnetic fluid is provided in the cavity 3. Magnetism is configured at the position of the fixed part 1 or the rotating part 2 for forming the inner wall of the cavity 3, so as to cooperate with the action of the magnetic fluid to meet the sealing requirement between the rotating part 2 and the fixed part 1;

[0030] The fixed part 1 is provided with an airflow channel 101, and a channel wall on one side of the airflow channel 101 and a cavity wall on one side of the cavity 3 are in a positional relationship of sharing a wall. The airflow channel 101 is arranged in a ring-shaped manner around the cavity 3. When the rotating part 2 rotates relative to the fixed part 1, an airflow passing through the airflow channel 101 is formed;

[0031] During the rotation of the shaft on the device, the utility model drives the rotating part 2 to rotate on the fixed part 1. The temperature of the magnetic fluid in the cavity 3 reaches the air flow channel 101 through heat transfer. When the rotating part 2 rotates relative to the fixed part 1, the air flow passes through the air flow channel 101, thereby achieving a wind-cooling and heat dissipation effect on the air flow channel 101, which is indirectly converted into a heat dissipation effect on the wall of the cavity 3 to achieve a heat dissipation effect on the magnetic fluid. Compared with the prior art, it can achieve a heat dissipation effect of the magnetic fluid while the shaft rotates, thereby reducing the occurrence of excessive temperature of the magnetic fluid and extending the service life of the device.

[0032] Further, see Figure 3 and Figure 4 The number of the cavities 3 can be set to be multiple and distributed in sequence along the axial direction of the penetration area 201, so as to increase the number of sealing points and improve the sealing effect between the rotating part 2 and the fixed part 1.

[0033] Further, see Figure 1 and Figures 3-5 Regarding the formation of airflow, a fan blade 202 is provided on the rotating part 2, which is located at the port of the airflow channel 101. When the rotating part 2 rotates relative to the fixed part 1, the fan blade 202 causes external air to be sucked into the airflow channel 101. In order to increase the connection strength between the fan blade 202 and the rotating part 2, the fan blade 202 and the rotating part 2 can also be set as an integrated structure.

[0034] Further, see Figure 3 and Figure 5 In order to ensure the uniformity of the airflow in the airflow channel 101, a plurality of guide blades 102 may be evenly arranged in the airflow channel 101, and both ends of the guide blades 102 extend to the two ends of the airflow channel 101 respectively. After the airflow enters the airflow channel 101, it is dispersed by the guide blades 102, so that it passes through all parts of the airflow channel 101 evenly to increase the heat dissipation effect. At the same time, the guide blades 102 can also increase the overall structural strength of the fixing part 1; in order to extend the path length of the airflow beam in the airflow channel 101, the guide blades 102 can also be set to a spiral shape so that the branched airflow beam flows in a spiral shape.

[0035] Further, see Figure 1 and Figure 2, the fixing part 1 integrally includes an annular part 103 and a connecting part 104. The air flow channel 101 is located on the annular part 103. The annular part 103 is responsible for rotational cooperation with the rotating part 2. The connecting part 104 is located at one end of the annular part 103 and is formed integrally with the annular part 103. The connecting part 104 is used for fixed connection with the device. The cooperation between the connecting part 104 and the annular part 103 can further increase the structural strength of the fixing part 1. The structure of the connecting part 104 can increase the structural strength of the circular curvature of the annular part 103, thereby increasing the pit deformation ability of the annular part 103.

[0036] It should be understood that in the development process of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without excessive experimentation, the development efforts will be a routine task of design, manufacturing, and production.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A magnetic fluid sealing device, characterized in that: It includes a fixed part (1) and a rotating part (2), where: The rotating part (2) is rotationally engaged with the fixed part (1), and a through area (201) for the shaft body to pass through is provided through the rotating part (2); A cavity (3) is formed between the rotating part (2) and the fixed part (1), which is annularly distributed on the periphery of the through area (201), and a magnetorheological fluid is provided in the cavity (3); An air flow channel (101) is provided on the fixed part (1), which is annularly arranged on the periphery of the cavity (3). When the rotating part (2) rotates relative to the fixed part (1), an air flow passing through the air flow channel (101) is formed.

2. The magnetic fluid sealing device according to claim 1, wherein: The number of the cavities (3) is multiple, and they are sequentially distributed along the axial direction of the through area (201).

3. The magnetic fluid sealing device according to claim 1, wherein: A wind blade (202) is provided on the rotating part (2), which is located at the port of the air flow channel (101).

4. The magnetic fluid sealing device according to claim 3, wherein: The wind blade (202) and the rotating part (2) are integrally formed.

5. The magnetic fluid sealing device according to claim 1, characterized in that: A plurality of guide vanes (102) are uniformly arranged in the air flow channel (101), and they extend to both ends of the air flow channel (101).

6. The magnetic fluid sealing device according to claim 5, characterized in that: The guide vanes (102) are arranged in a spiral shape.

7. The magnetic fluid sealing device according to claim 1, wherein: The fixed part (1) includes an annular part (103) and a connecting part (104). The air flow channel (101) is located on the annular part (103). The rotating part (2) is rotationally engaged with the annular part (103). The connecting part (104) is located at one end of the annular part (103) and is integrally formed with the annular part (103).

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