CN212338159U

CN212338159U - Combined sealing device for horizontal stirrer

Info

Publication number: CN212338159U
Application number: CN202020521696.3U
Authority: CN
Inventors: 罗小松; 颜井明; 顾丽锋
Original assignee: Wuxi Quanshi Full Fluid Technology Co ltd
Current assignee: Wuxi Quanshi Full Fluid Technology Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-01-12
Anticipated expiration: 2030-04-10

Abstract

The utility model discloses a horizontal combined sealing device for agitator, including main shaft, packing box and seal receptacle cover establish on the main shaft, seal receptacle and packing box pass through the fix with screw, the packing box in be provided with the filler, filler and main shaft contact, seal receptacle and main shaft between be provided with terminal shoe I, terminal shoe II and permanent magnet, the permanent magnet be located between terminal shoe I and the terminal shoe II, terminal shoe I and terminal shoe II and main shaft between the clearance fill have magnetic liquid, terminal shoe I and terminal shoe II keep away from one side of permanent magnet and be provided with packing ring I and packing ring II respectively, packing ring I and packing ring II's opposite side be provided with bearing I and bearing II, the seal receptacle keep away from the one end of packing box and be fixed with the gland. By combining the packing seal and the magnetic liquid seal, the problems that the medium is easy to leak, the service life of the seal is short and the like can be completely solved.

Description

Combined sealing device for horizontal stirrer

Technical Field

The utility model belongs to the technical field of mechanical seal, a horizontal combined sealing device for agitator is related to.

Background

The horizontal stirrer mechanical seal is a device for preventing fluid leakage in a horizontal stirrer, which is formed by at least one pair of end faces perpendicular to a rotating axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.

The horizontal stirrer combined sealing device is suitable for sealing toxic, harmful, inflammable, explosive and other volatile liquid media in horizontal stirrers in the fields of petroleum, chemical engineering and the like, and can effectively solve the problems that the liquid media of the mechanical seal on a friction pair are volatile, so that the mechanical seal is dry-ground and the like, the service life of the seal is short and the like. Therefore, it is imperative to provide a new sealing solution.

SUMMERY OF THE UTILITY MODEL

Technical defect to the above-mentioned current horizontal agitator mechanical seal exists, the utility model provides a horizontal agitator is with combination sealing device through sealing with the filler and the sealed combination of magnetic liquid, can solve above medium easily to leak and sealed life weak point scheduling problem completely.

The utility model discloses specifically realize through following technical scheme:

the utility model provides a horizontal combined sealing device for agitator, includes main shaft, stuffing box and seal receptacle cover establish on the main shaft, seal receptacle and stuffing box pass through the fix with screw, the stuffing box in be provided with the filler, filler and main shaft contact, seal receptacle and main shaft between be provided with pole shoe I, pole shoe II and permanent magnet, the permanent magnet be located between pole shoe I and the pole shoe II, the clearance between pole shoe I and pole shoe II and the main shaft fill magnetic liquid, pole shoe I and pole shoe II keep away from one side of permanent magnet and be provided with packing ring I and packing ring II respectively, packing ring I and packing ring II's opposite side be provided with bearing I and bearing II, the seal receptacle keep away from the one end of stuffing box and be fixed with the gland.

The stuffing box is provided with a blocking air inlet which penetrates through the stuffing box and leads to the main shaft.

The contact surfaces of the pole shoe I and the pole shoe II and the main shaft are provided with annular teeth, and the annular teeth are trapezoidal.

The magnetic liquid is adsorbed at the tip of the annular tooth under the action of the magnetic field to form a plurality of liquid annular rings.

And a framework oil seal is arranged on the other side of the bearing II.

And a framework oil seal is arranged at one end of the gland, which is far away from the bearing I.

The utility model has the advantages that:

the utility model discloses horizontal agitator is with combination sealing device comprises two parts, and partly is the packing seal, and another part is the magnetic fluid seal, and the packing seal is used for medium contact position, and the magnetic fluid seal is used for the atmosphere end, forms a cavity in the middle of the packing seal is sealed with the magnetic fluid, and inside can fill the isolation gas, through the utility model discloses a design, sealed long service life, and possible zero leakage has compensatied the not enough of packing seal or mechanical seal, is applicable to the sealing of the interior volatile liquid medium of poisonous and harmful, flammable and explosive etc. of horizontal agitator in fields such as petroleum, chemical industry.

Drawings

FIG. 1 is a schematic structural view of the combined sealing device for a horizontal mixer according to the present invention;

in the figure:

1. the device comprises a gland 2, a shaft retainer ring 3, bearings I and 4, gaskets I and 5, a sealing seat 6, pole shoes I and 7, a permanent magnet 8, pole shoes II and 9, gaskets II and 10 and a bearing II; 11. a filler 12, a filler box 13, a main shaft 14 and a blocking air inlet;

15-16 is a framework oil seal;

17-19 are screws;

20-23 are sealing rings.

Detailed Description

The technical solution of the present invention will be described clearly and completely below with reference to specific embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

A combined sealing device for a horizontal stirrer is shown in figure 1 and comprises a sealing seat 5, a stuffing box 12, a main shaft 13, stuffing 11, a gland 1, a shaft retainer ring 2, a gasket I4, a gasket II 9, a pole shoe I6, a permanent magnet 7, a pole shoe II 8, a bearing I3 and a bearing II 10. The sealing seat 5 and the stuffing box 12 are sleeved on the main shaft 13 in a surrounding mode, the stuffing box 12 is fixedly connected with the horizontal stirrer shell through screws, the sealing seat 5 is fixedly connected with the stuffing box 12 through screws, and a gland 1 is arranged at the left end of the sealing seat 5 through screws and used for fixing.

Four groups of fillers 11 are arranged between the interior of a stuffing box 12 and a main shaft 13, the fillers 11 are tightly pressed under the action of a sealing seat 5, a sealing gas inlet 14 is arranged on the stuffing box 12 along the section direction of the main shaft 13, the gas inlet pressure of the sealing gas is about greater than the medium pressure in a tank body, the medium can be sealed under the matching action of the sealing gas and the fillers 11, and the atmosphere end of the sealing gas is sealed through magnetic liquid sealing.

A pole shoe I6, a pole shoe II 8 and a permanent magnet 7 are arranged between a sealing seat 5 and a main shaft 13, the pole shoe I6 and the pole shoe II 8 are respectively positioned on the left side and the right side of the permanent magnet 7, the pole shoe I6, the pole shoe II 8 and the permanent magnet 7 form a magnetic liquid sealing unit, a certain gap is reserved between the pole shoe I6 and the pole shoe II 8 in the magnetic liquid sealing unit and the main shaft 13, magnetic liquid can be filled in the gap, trapezoidal annular teeth are arranged on contact surfaces of the pole shoe I6 and the pole shoe II 8 and the main shaft 13, the magnetic liquid is adsorbed at the tips of the annular teeth under the action of a magnetic field to form a plurality of liquid annular rings, and the liquid annular rings can adjust self balance under the action of the magnetic field according to sealing pressure so as to achieve. The left side of pole shoe I6 and the right side of pole shoe II 8 are provided with packing ring I4 and packing ring II 9 respectively, are provided with bearing I3 and bearing II 10 respectively on the left side of packing ring I4 and the right side of packing ring II 9, and the magnetic liquid seal unit guarantees normal operating through bearing I3 and bearing II 10. The main shaft 13 is further provided with a shaft check ring 2, and the shaft check ring 2 is located at the left end of the bearing I3 and used for fixing the bearing I3.

Meanwhile, a framework oil seal is arranged at the right end of the bearing II 10 and on the gland 1 and is used for sealing dust at the atmosphere end and lubricating oil of the bearing.

Preferably, a sealing ring is arranged at the joint of the stuffing box 12 and the horizontal stirrer shell, the sealing ring is arranged at the joint of the sealing box and the stuffing box 12, and the sealing rings are arranged at the ends of the pole shoes I6 and II 8, which are in contact with the sealing seat 5, so that the complete sealing of the device is ensured.

In the use process of the device, firstly, the liquid medium in the horizontal stirrer is sealed by the filler in the filler box 12, so that the liquid medium is prevented from contacting the magnetic liquid, and the service life of the magnetic liquid is prevented from being influenced. Because whole sealing device operation in-process, there is certain wearing and tearing in filler and main shaft 13, long-term use has certain calorific capacity, and inside easily gasify medium receives the rotatory in-process of filler to generate heat and can gasify, flows to the atmosphere end, through improving the pressure that is located the sealed gas of hindering between filler and the magnetic liquid seal for the pressure that hinders sealed gas is higher than the medium pressure in the horizontal agitator, can prevent that gasified medium from spilling over to the atmosphere end. The magnetic liquid seal mainly has the effects of sealing the blocking gas, ensuring that the pressure of the blocking gas is higher than the pressure of an internal medium, sealing the internal easily gasified medium through the blocking gas, and solving the problem of leakage of the easily gasified medium in the chemical production process, thereby realizing zero leakage of the internal medium.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these examples without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A combined sealing device for a horizontal stirrer comprises a main shaft (13), a stuffing box (12) and a sealing seat (5), and is characterized in that the stuffing box (12) and the sealing seat (5) are sleeved on the main shaft (13), the sealing seat (5) and the stuffing box (12) are fixed through screws, stuffing (11) is arranged in the stuffing box (12), the stuffing (11) is in contact with the main shaft (13), a pole shoe I (6), a pole shoe II (8) and a permanent magnet (7) are arranged between the sealing seat (5) and the main shaft (13), the permanent magnet (7) is positioned between the pole shoe I (6) and the pole shoe II (8), a gap between the pole shoe I (6) and the pole shoe II (8) and the main shaft (13) is filled with magnetic liquid, one sides of the pole shoe I (6) and the pole shoe II (8) far away from the permanent magnet (7) are respectively provided with a gasket I (4) and a gasket II (9), the bearing I (3) and the bearing II (10) are arranged on the other sides of the gasket I (4) and the gasket II (9), and the gland (1) is fixed at one end, far away from the stuffing box (12), of the sealing seat (5).

2. A combined sealing device for a horizontal mixer according to claim 1, wherein the stuffing box (12) is provided with a blocking gas inlet (14), and the blocking gas inlet (14) extends through the stuffing box (12) to the main shaft (13).

3. The combined sealing device for the horizontal agitator as claimed in claim 2, wherein the contact surfaces of the pole shoes I (6) and II (8) and the main shaft (13) are provided with annular teeth, and the annular teeth are trapezoidal.

4. The combined sealing device for the horizontal agitator as claimed in claim 3, wherein a framework oil seal is arranged on the other side of the bearing II (10); and a framework oil seal is arranged at one end, far away from the bearing I (3), of the gland (1).