Magnetic fluid sealing device with corrosive gas sealing function

Abstract

The utility model discloses a magnetofluid sealing device capable of sealing corrosive gas, which belongs to the technical field of magnetofluid sealing and comprises a shaft sleeve and a shell, a left inner sleeve is sleeved in an inner cavity of the shaft sleeve, and a right end cover is sleeved on the inner side of one end of the shell. According to the utility model, the left inner sleeve is installed on the inner side of the shaft sleeve, the right end cover is installed on the inner side of the shaft sleeve, a magnetic fluid structure composed of the bearing, the shaft clamp, the first isolation pad, the second O-shaped ring, the pole shoe, the magnetic column and the second isolation pad is arranged between the shaft sleeve and the shell, and the shaft sleeve and the shell are connected through the gland, the second inner hexagon screw and the shell. An inner cavity where corrosive gas moves is isolated from the whole magnetofluid through the left inner sleeve and the right end cover which are made of polytetrafluoroethylene materials, it is guaranteed that the corrosive gas does not make contact with metal parts sealed by the magnetofluid, and good safety and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic fluid sealing, and more specifically to a magnetic fluid sealing device capable of sealing corrosive gas. Background Art

[0002] Magnetic fluid sealing technology is developed on the basis of magnetic fluid. When magnetic fluid is injected into the gap of magnetic field, it can fill the entire gap and form a "liquid O-ring". Most of the gases sealed by magnetic fluid are non-corrosive gases, but some magnetic fluid seals need to seal corrosive gases, such as hydrogen halides, NH3, etc., which have a corrosive effect on magnetic fluid sealing parts. Therefore, it is necessary to design a structure to isolate the corrosive gas in the inner cavity so that the magnetic fluid sealing parts are not corroded by the gas to ensure the sealing performance of the magnetic fluid. For this reason, we propose a magnetic fluid sealing device with the function of sealing corrosive gases. Utility Model Content

[0003] In view of the problems mentioned in the above background technology, the purpose of the present utility model is to provide a magnetic fluid sealing device capable of sealing corrosive gases.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A magnetic fluid sealing device with the function of sealing corrosive gas comprises a sleeve and a shell, the inner cavity of the sleeve is sleeved with a left inner sleeve, the inner side of one end of the shell is sleeved with a right end cover, a skeleton oil seal is arranged between the sleeve and the left inner sleeve and at one end of the right end cover, two bearings are fixedly sleeved between the sleeve and the shell, two shaft clamps are sleeved on the outer side of the sleeve, the side surfaces of the two shaft clamps are fitted with the side surfaces of the two bearings, two pole shoes are sleeved between the sleeve and the shell, a magnetic column is sleeved between the two pole shoes, a spacer 1 is sleeved between one of the bearings and a pole shoe, a spacer 2 is sleeved between the other bearing and the other pole shoe, a pressure cap is sleeved at the other end of the shell, a plurality of second hexagon socket screws are sleeved on the pressure cap, and the ends of the second hexagon socket screws are threadedly mounted to the interior of the shell.

[0006] As a preferred solution of the utility model, an O-ring is sleeved between the left inner sleeve and the sleeve, and a plurality of first hexagon socket screws are sleeved on the end of the left inner sleeve, and the ends of the first hexagon socket screws are threadedly installed into the interior of the sleeve.

[0007] As a preferred solution of the utility model, an O-ring three is sleeved between the right end cover and the shell, and a plurality of other first hexagon socket screws are sleeved on the end of the right end cover, and the ends of the plurality of first hexagon socket screws are threadedly installed into the interior of the shell.

[0008] As a preferred solution of the utility model, an O-ring 2 is sleeved between the pole shoe and the housing.

[0009] As a preferred solution of the utility model, the end of the left inner sleeve is provided with a chamfer, and the side of the shaft sleeve is provided with a plurality of first mounting holes.

[0010] As a preferred solution of the utility model, the other end of the right end cover is sleeved with an O-ring four, and the other end of the shell is provided with a plurality of second mounting holes.

[0011] As a preferred solution of the utility model, a support seat is provided at the bottom of the shell, and a plurality of threaded holes are formed on the bottom surface of the support seat.

[0012] The utility model has the following advantages: in the utility model, a left inner sleeve is installed on the inner side of the shaft sleeve, a right end cover is installed on the inner side of the shaft sleeve, a magnetic fluid structure consisting of a bearing, a shaft clamp, a spacer 1, an O-ring 2, a pole shoe, a magnetic column, and a spacer 2 is placed between the shaft sleeve and the shell, a gland, a second hexagon socket screw, and a shell are used to connect the shaft sleeve and the shell, and an inner cavity where corrosive gas moves is isolated from the entire magnetic fluid by the left inner sleeve and the right end cover made of polytetrafluoroethylene material, so that the corrosive gas will not contact the metal parts sealed by the magnetic fluid, and the utility model has good safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall cross-sectional schematic diagram of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the right end cover of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the left inner sleeve of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the support seat of the utility model.

[0017] Explanation of the numbers in the figure: 1. Left inner sleeve; 2. First hexagon socket screw; 3. O-ring one; 4. Bushing; 5. Pressure cap; 6. Second hexagon socket screw; 7. Bearing; 8. Shaft clamp; 9. Spacer one; 10. O-ring two; 11. Pole shoe; 12. Magnetic column; 13. Spacer two; 14. Housing; 15. Skeleton oil seal; 16. Right end cover; 17. O-ring three; 18. O-ring four; 19. Chamfer; 20. Support seat; 21. Threaded hole; 22. First mounting hole; 23. Second mounting hole. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the utility model 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, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Embodiment 1:

[0021] See also Figure 1-4 , a magnetic fluid sealing device with the function of sealing corrosive gas, comprises a sleeve 4 and a shell 14, the inner cavity of the sleeve 4 is sleeved with a left inner sleeve 1, the inner side of one end of the shell 14 is sleeved with a right end cover 16, a skeleton oil seal 15 is arranged between the sleeve 4 and the left inner sleeve 1 and at one end of the right end cover 16, two bearings 7 are fixedly sleeved between the sleeve 4 and the shell 14, two shaft clamps 8 are sleeved on the outer side of the sleeve 4, and the side surfaces of the two shaft clamps 8 are fitted with the side surfaces of the two bearings 7, two pole shoes 11 are sleeved between the sleeve 4 and the shell 14, a magnetic column 12 is sleeved between the two pole shoes 11, a spacer 9 is sleeved between one bearing 7 and a pole shoe 11, a spacer 2 13 is sleeved between the other bearing 7 and the other pole shoe 11, and a pressure cap 5 is sleeved at the other end of the shell 14, and a plurality of second hexagon socket screws 6 are sleeved on the pressure cap 5, and the ends of the second hexagon socket screws 6 are threadedly mounted to the interior of the shell 14.

[0022] In this embodiment, the pressure cover 5 and the shell 14 are connected by the second hexagon socket screw 6, and a screw hole for installing the second hexagon socket screw 6 is opened on the shell 14, wherein the left inner sleeve 1 and the right end cover 16 are made of polytetrafluoroethylene, the first hexagon socket screw 2, the pressure cover 5, the second hexagon socket screw 6, the spacer 1 9, the spacer 2 13 and the shell 14 can be made of 304 stainless steel, the sleeve 4 is made of heat-treated 603 steel, the pole shoe 11 is made of 2Cr13 material, the outer side surface of the left inner sleeve 1 is in contact with the inner wall of the sleeve 4, and the outer side surface of the right end cover 16 is in contact with the inner wall of the shell 14.

[0023] For details, please refer to Figure 1-3 An O-ring 3 is sleeved between the left inner sleeve 1 and the sleeve 4, and a plurality of first hexagon socket screws 2 are sleeved on the end of the left inner sleeve 1, and the end of the first hexagon socket screw 2 is threadedly installed into the interior of the sleeve 4.

[0024] In this embodiment, the installation sealing between the left inner sleeve 1 and the sleeve 4 is ensured by an O-ring 3, and the O-ring 3 can be made of fluororubber. In addition, the left inner sleeve 1 and the sleeve 4 are connected by a first hexagon socket screw 2, and a screw hole for installing the first hexagon socket screw 2 is provided on the sleeve 4.

[0025] For details, please refer to Figure 1-2 An O-ring 17 is sleeved between the right end cover 16 and the housing 14 , and a plurality of other first hexagon socket screws 2 are sleeved on the end of the right end cover 16 , and the ends of the plurality of first hexagon socket screws 2 are threadedly mounted to the interior of the housing 14 .

[0026] In this embodiment, an O-ring 3 17 is used to ensure the installation seal between the right end cover 16 and the shell 14. The O-ring 3 17 can be made of fluororubber. In addition, the right end cover 16 and the shell 14 are connected by a first hexagon socket screw 2. A screw hole for installing the first hexagon socket screw 2 is opened on the shell 14.

[0027] For details, please refer to Figure 1 An O-ring 10 is sleeved between the pole shoe 11 and the housing 14 .

[0028] In this embodiment, the sealing between the pole piece 11 and the housing 14 is increased by using the O-ring 10 , and the O-ring 10 may be made of fluororubber.

[0029] For details, please refer to Figure 1 and Figure 3 A chamfer 19 is formed at the end of the left inner sleeve 1 , and a plurality of first mounting holes 22 are formed at the side of the sleeve 4 .

[0030] In this embodiment, the angle of the chamfer 19 is 120 degrees. The chamfer 19 is used to facilitate the flow of fluid. The shaft sleeve 4 is connected through the first mounting hole 22 and bolts, wherein the rotating end is connected to the shaft sleeve 4.

[0031] For details, please refer to Figure 1-2 The other end of the right end cover 16 is sleeved with an O-ring 18, and the other end of the shell 14 is provided with a plurality of second mounting holes 23.

[0032] In this embodiment, the sealing of the connection with the right end cover 16 is ensured by an O-ring four 18, and the O-ring four 18 can be made of fluororubber. The shell 14 is connected through the second mounting hole 23 and bolts, wherein the fixed end is connected to the shell 14, and multiple second mounting holes 23 are evenly arranged in a circle around the center line of the shell 14.

[0033] For details, please refer to Figure 1 and Figure 4 A support base 20 is disposed at the bottom of the housing 14 , and a plurality of threaded holes 21 are formed on the bottom surface of the support base 20 .

[0034] In this embodiment, the magnetic fluid sealing device is supported and fixed by the support seat 20 and the threaded hole 21 .

[0035] Working principle: When in use, first connect the left inner sleeve 1 with the sleeve 4 through the first hexagon socket screw 2 to isolate the inner cavity from the sleeve 4 of the magnetic fluid, then connect the right end cover 16 with the shell 14 through another first hexagon socket screw 2 to isolate the inner cavity from the shell 14 of the magnetic fluid, and then arrange the upper bearing 7, shaft clamp 8, spacer 1 9, O-ring 2 10, pole shoe 11, magnetic column 12, spacer 2 13 between the shell 14 and the sleeve 4 to form a magnetic fluid structure between the shell 14 and the sleeve 4. Finally, when working, the inner cavity where the corrosive gas moves is isolated from the entire magnetic fluid by the left inner sleeve 1 and the right end cover 16 made of polytetrafluoroethylene material, thereby ensuring that the corrosive gas will not contact the metal parts of the magnetic fluid seal, so that the magnetic fluid seal can be used on equipment containing corrosive gases, and the magnetic fluid sealing parts will not be corroded, thereby ensuring production safety and service life, and improving production efficiency.

[0036] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A magnetic fluid sealing device capable of sealing corrosive gases, characterized in that: The invention comprises a shaft sleeve (4) and a housing (14), wherein the inner cavity of the shaft sleeve (4) is sleeved with a left inner sleeve (1), the inner side of one end of the housing (14) is sleeved with a right end cover (16), a skeleton oil seal (15) is arranged between the shaft sleeve (4) and the left inner sleeve (1) and at one end of the right end cover (16), two bearings (7) are fixedly sleeved between the shaft sleeve (4) and the housing (14), two shaft clamps (8) are sleeved on the outer side of the shaft sleeve (4), the side surfaces of the two shaft clamps (8) are in contact with the side surfaces of the two bearings (7), and the shaft sleeve Two pole shoes (11) are sleeved between the bearing (4) and the shell (14), a magnetic column (12) is sleeved between the two pole shoes (11), a spacer (9) is sleeved between one bearing (7) and one pole shoe (11), and a spacer (13) is sleeved between the other bearing (7) and the other pole shoe (11), a pressure cover (5) is sleeved on the other end of the shell (14), and a plurality of second hexagon socket screws (6) are sleeved on the pressure cover (5), and the ends of the second hexagon socket screws (6) are threadedly installed into the interior of the shell (14).

2. A magnetic fluid sealing device capable of sealing corrosive gas according to claim 1, characterized in that: An O-ring (3) is sleeved between the left inner sleeve (1) and the shaft sleeve (4), and a plurality of first hexagon socket screws (2) are sleeved on the end of the left inner sleeve (1), and the ends of the first hexagon socket screws (2) are threadedly mounted inside the shaft sleeve (4).

3. The magnetic fluid sealing device capable of sealing corrosive gas according to claim 1, characterized in that: An O-ring three (17) is sleeved between the right end cover (16) and the housing (14), and a plurality of other first hexagon socket screws (2) are sleeved on the end of the right end cover (16), and the ends of the plurality of first hexagon socket screws (2) are threadedly mounted to the interior of the housing (14).

4. The magnetic fluid sealing device capable of sealing corrosive gas according to claim 1, characterized in that: An O-ring 2 (10) is sleeved between the pole shoe (11) and the housing (14).

5. The magnetic fluid sealing device capable of sealing corrosive gas according to claim 4, characterized in that: The end of the left inner sleeve (1) is provided with a chamfer (19), and the side of the shaft sleeve (4) is provided with a plurality of first mounting holes (22).

6. The magnetic fluid sealing device capable of sealing corrosive gas according to claim 1, characterized in that: The other end of the right end cover (16) is sleeved with an O-ring 4 (18), and the other end of the housing (14) is provided with a plurality of second mounting holes (23).

7. The magnetic fluid sealing device capable of sealing corrosive gas according to claim 1, characterized in that: A support seat (20) is provided at the bottom of the housing (14), and a plurality of threaded holes (21) are provided on the bottom surface of the support seat (20).

Images