Magnetic fluid sealing device for chemical industry

Abstract

The magnetic fluid sealing device for the chemical industry comprises an inner cylinder and an outer cylinder, the inner cylinder is located in the outer cylinder, an annular cavity is formed between the inner cylinder and the outer cylinder, and two annular pole shoes are arranged between the outer wall of the inner cylinder and the inner wall of the outer cylinder side by side; the inner wall of the annular pole shoe is attached to the outer wall of the inner cylinder body, the outer wall of the annular pole shoe is attached to the inner wall of the outer cylinder body, a plurality of annular grooves which are arranged side by side are concavely formed in the position, making contact with the annular pole shoe, of the outer wall of the inner cylinder body, and the annular grooves are filled with magnetic liquid. According to the utility model, non-contact sealing can be realized, so that the problems of friction loss and abrasion in a traditional sealing mode are avoided, the operation efficiency of equipment can be greatly improved, and the energy cost is saved.

Description

Technical Field

[0001] This application relates to the field of chemical engineering devices, and particularly to a magnetic fluid sealing device for chemical engineering. Background Art

[0002] In chemical engineering, there are often devices with internal vacuum and external atmosphere, and a rotating structure needs to extend into the internal structure. When a general rubber gasket is used for isolation in the rotating structure, when the rotating speed is high, the friction is relatively large, and the sealing performance will decline over time. Utility Model Content

[0003] The purpose of this utility model is to provide a magnetic fluid sealing device for chemical engineering, which can achieve non-contact sealing, thereby avoiding the friction loss and wear problems existing in traditional sealing methods, and can greatly improve the operation efficiency of the equipment and save energy costs.

[0004] To achieve the above purpose, the present utility model provides the following technical solutions.

[0005] An embodiment of this application discloses a magnetic fluid sealing device for chemical engineering, including an inner cylinder and an outer cylinder. The inner cylinder is located inside the outer cylinder, and an annular cavity is formed between the inner cylinder and the outer cylinder. Two annular pole shoes are arranged side by side between the outer wall of the inner cylinder and the inner wall of the outer cylinder. The inner wall of the annular pole shoe is attached to the outer wall of the inner cylinder, and the outer wall of the annular pole shoe is attached to the inner wall of the outer cylinder. A plurality of annular grooves arranged side by side are recessed on the outer wall of the inner cylinder at the contact position with the annular pole shoe, and the annular grooves are filled with magnetic liquid.

[0006] Preferably, in the above magnetic fluid sealing device for chemical engineering, the inner cylinder / outer cylinder is rotatably arranged.

[0007] Preferably, in the above magnetic fluid sealing device for chemical engineering, an annular permanent magnet is clamped between the two annular pole shoes.

[0008] Preferably, in the above magnetic fluid sealing device for chemical engineering, bearings are respectively arranged at both ends of the annular cavity.

[0009] Preferably, in the above magnetic fluid sealing device for chemical engineering, an annular support plate is arranged between the bearing and the adjacent annular pole shoe.

[0010] Preferably, in the above magnetic fluid sealing device for chemical engineering, the annular groove is formed on an annular cylinder, the annular cylinder is attached to and supports the outer wall of the inner cylinder, and both ends of the annular cylinder are respectively supported by the bearing and an annular stepped body protruding outward from the outer wall of the inner cylinder.

[0011] Compared with the prior art, the advantages of the present utility model are that since the magnetic fluid sealing device adopts the combination of magnetic force and hydraulic pressure, it has the advantages of safety, reliability and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 The semi-sectional view of the magnetic fluid sealing device for chemical industry in the embodiment of the present utility model is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will combine the drawings in the embodiments of the present utility model to describe the technical solutions in the embodiments of the present utility model in detail. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0015] Combined Figure 1 As shown, the magnetic fluid sealing device 100 for chemical industry includes an inner cylinder 101 and an outer cylinder 102. The inner cylinder 101 is located inside the outer cylinder 102. An annular cavity 103 is formed between the inner cylinder 101 and the outer cylinder 102. Two annular pole shoes 104 are arranged side by side between the outer wall of the inner cylinder 101 and the inner wall of the outer cylinder 102. The inner wall of the annular pole shoe 104 is attached to the outer wall of the inner cylinder 101, and the outer wall of the annular pole shoe 104 is attached to the inner wall of the outer cylinder 102. A plurality of annular grooves 105 arranged side by side are recessed on the outer wall of the inner cylinder 101 at the contact with the annular pole shoe 104. The annular grooves 105 are filled with magnetic fluid. The inner cylinder 101 / outer cylinder 102 is rotatably arranged. An annular permanent magnet 106 is clamped between the two annular pole shoes 104.

[0016] In this embodiment, when the inner cylinder rotates, sealing is achieved by utilizing the unique properties of the magnetic fluid. When the magnetic fluid is injected into the gap of the magnetic field, it can fill the entire gap, forming a "liquid O-ring seal". The function of the magnetic fluid sealing device is to transfer the rotational motion into the sealed container, and it can achieve non-contact sealing, thus avoiding the frictional losses and wear problems existing in the traditional sealing methods, and can greatly improve the operating efficiency of the equipment and save energy costs.

[0017] Furthermore, bearings 107 are respectively arranged at both ends of the annular cavity 103. An annular support plate 108 is arranged between the bearing 107 and the adjacent annular pole shoe 104. An annular groove 105 is formed in the annular cylinder body 109. The annular cylinder body 109 is attached to and supports the outer wall of the inner cylinder body 101. Both ends of the annular cylinder body 109 are respectively supported by the bearing 107 and an annular stepped body 110 formed by the outward protrusion of the outer wall of the inner cylinder body 101.

[0018] In this embodiment, the stability of each component and the overall structure is ensured.

[0019] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0020] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A magnetic fluid sealing device for chemical industry, characterized in that, It includes an inner cylinder and an outer cylinder. The inner cylinder is located inside the outer cylinder. An annular cavity is formed between the inner cylinder and the outer cylinder. Two annular pole shoes are arranged side by side between the outer wall of the inner cylinder and the inner wall of the outer cylinder. The inner wall of the annular pole shoe is attached to the outer wall of the inner cylinder, and the outer wall of the annular pole shoe is attached to the inner wall of the outer cylinder. A plurality of annular grooves arranged side by side are recessed on the outer wall of the inner cylinder at the contact position with the annular pole shoe, and the annular grooves are filled with magnetic fluid.

2. The magnetic fluid sealing device for chemical industry according to claim 1, wherein The inner cylinder / outer cylinder is rotatably arranged.

3. The magnetic fluid sealing device for chemical industry according to claim 1, characterized in that, An annular permanent magnet is clamped between the two annular pole shoes.

4. The magnetic fluid sealing device for chemical industry according to claim 1, characterized in that Bearings are respectively arranged at both ends of the annular cavity.

5. The magnetic fluid sealing device for chemical industry according to claim 4, characterized in that, An annular support plate is arranged between the bearing and the adjacent annular pole shoe.

6. The magnetic fluid sealing device for chemical industry according to claim 4, characterized in that The annular groove is formed in an annular cylinder, the annular cylinder is attached to and supports the outer wall of the inner cylinder, and both ends of the annular cylinder are respectively supported by the bearing and an annular stepped body protruding outward from the outer wall of the inner cylinder.

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