Magnetic non-contact type mechanical sealing device

Abstract

The utility model relates to the field of mechanical sealing devices, and discloses a magnetic force non-contact type mechanical sealing device which comprises a first positioning sleeve, a first sealing ring, a movable ring, a second positioning sleeve, an end cover, a static ring seat, a static ring, a magnetic force column and a spiral groove. When the equipment is in a static state, the movable ring can be attracted through magnetic force generated by the magnetic column, so that the movable ring tightly abuts against the static ring, and lubricating oil in the sealing cavity can be sealed; when equipment is in a running state, the rotating shaft drives the moving ring to rotate, the moving ring and the static ring can be separated from each other through the spiral groove formed in the moving ring, a layer of stable gas film is formed, the gas film can play a sealing role, dry friction between the moving ring and the static ring can be avoided, and the sealing effect is improved. Therefore, the service life of the utility model is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of mechanical seal devices, in particular to a magnetic non-contact mechanical seal device. Background Art

[0002] Axial flow fan oil supply equipment is currently applied in the petroleum industry and petrochemical industry. The working principle of such equipment is as follows: when the equipment is in a static state, the sealing cavity is filled with lubricating oil, and when it is in a working state, the thrust generated by the rotation of the blades forces the lubricating oil in the sealing cavity to flow axially.

[0003] In order to ensure the sealing performance of the equipment, a sealing device needs to be installed in the sealing cavity. Currently, common sealing devices include packing seals, which have problems such as short service life and frequent installation and disassembly during use; ordinary contact mechanical seal devices are also used. Since the rotating blades draw away the lubricating oil in the sealing cavity when the equipment is in a working state, only air remains in the sealing cavity, which will cause dry friction on the end face of the contact seal device, thereby reducing its service life. Summary of the Utility Model

[0004] Based on the above problems, the purpose of the utility model is to provide a magnetic non-contact mechanical seal device to solve the problems existing in the above-mentioned prior art.

[0005] The utility model adopts the following technical solutions:

[0006] The utility model provides a magnetic non-contact mechanical seal device, which includes a first positioning sleeve, a first sealing ring, a moving ring, and a second positioning sleeve that are sequentially sleeved on the rotating shaft of the equipment. A end cover is sleeved on the second positioning sleeve, and the end cover is hermetically connected to the equipment housing;

[0007] A static ring seat is hermetically embedded inside the end cover. A static ring and magnetic columns are embedded in the static ring seat. The magnetic columns correspond to the moving ring, and there is a gap between the two; the static ring abuts against the moving ring, and a spiral groove corresponding to the static ring is provided circumferentially at the edge of the moving ring.

[0008] Further, an annular installation groove one is provided circumferentially inside the end cover. An annular installation groove two is provided circumferentially on the groove wall of the installation groove one. A second sealing ring is provided in the installation groove two. The static ring seat is hermetically embedded on the end cover through the installation groove one and the second sealing ring.

[0009] Still further, an annular installation groove three is provided circumferentially at the edge of the static ring seat. The static ring is embedded on the static ring seat through the installation groove three.

[0010] Furthermore, a plurality of mounting grooves four are provided inside the mounting groove three, and the plurality of mounting grooves four are uniformly arranged along the circumferential direction of the stationary ring seat; the number of the magnetic columns is the same as that of the mounting grooves four, and the two correspond to each other one by one; the magnetic columns are embedded in the stationary ring seat through the mounting grooves four.

[0011] Furthermore, a sealing ring three is sleeved on the end cover, and the end cover is hermetically connected to the equipment housing through the sealing ring three.

[0012] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:

[0013] When the equipment is in a stationary state, the magnetic force generated by the magnetic columns can attract the moving ring, so that the moving ring is tightly abutted against the stationary ring, thereby being able to seal the lubricating oil in the sealing cavity; when the equipment is in an operating state, the rotating shaft drives the moving ring to rotate, and through the spiral grooves provided on the moving ring, the moving ring and the stationary ring can be separated from each other to form a stable gas film. This gas film can not only play a sealing role but also avoid dry friction between the moving ring and the stationary ring, thereby improving the service life of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model will be further described below with reference to the drawings.

[0015] Figure 1 is a partial structural schematic diagram of the magnetic non-contact mechanical seal device of the present utility model;

[0016] Figure 2 is a partial structural schematic diagram of the stationary ring seat, magnetic columns and the stationary ring seat of the present utility model;

[0017] Figure 3 is a structural schematic diagram of the moving ring of the present utility model;

[0018] Figure 4 is Figure 3 a side view of;

[0019] Figure 5 is a structural schematic diagram of the end cover of the present utility model;

[0020] Figure 6 is a structural schematic diagram of the stationary ring seat of the present utility model;

[0021] Figure 7 is a structural schematic diagram of the stationary ring of the present utility model;

[0022] Figure 8 is a structural schematic diagram of the positioning sleeve one of the present utility model;

[0023] Figure 9 is a structural schematic diagram of the positioning sleeve two of the present utility model.

[0024] Description of reference numerals: 1, first positioning sleeve; 2, first sealing ring; 3, moving ring; 301, spiral groove; 4, second positioning sleeve; 5, end cover; 501, first installation groove; 502, second installation groove; 6, stationary ring seat; 601, third installation groove; 602, fourth installation groove; 7, stationary ring; 8, magnetic column; 9, second sealing ring; 10, third sealing ring. Detailed implementation manners

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0026] As Figures 1 - 9 shown, in this embodiment, a magnetic non-contact mechanical seal device is disclosed, which includes a first positioning sleeve 1, a first sealing ring 2, a moving ring 3, and a second positioning sleeve 4 that are sequentially sleeved on the rotating shaft of the device. A second positioning sleeve 4 is sleeved with an end cover 5, and the end cover 5 is hermetically connected to the device housing; a stationary ring seat 6 is hermetically embedded inside the end cover 5, and a stationary ring 7 and a magnetic column 8 are embedded in the stationary ring seat 6. The magnetic column 8 corresponds to the moving ring 3, and there is a gap between the two; the stationary ring 7 abuts against the moving ring 3, and a spiral groove 301 corresponding to the stationary ring 7 is provided along the circumference at the edge of the moving ring 3.

[0027] In this embodiment, both the first positioning sleeve 1 and the second positioning sleeve 4 are fixedly sleeved on the rotating shaft. The first positioning sleeve 1 and the second positioning sleeve 4 press the first sealing ring 2 and the moving ring 3 between them, and there is a clearance fit between the end cover 5 and the second positioning sleeve 4.

[0028] The working principle of the above technical solution is as follows: When the device is in a stationary state, the magnetic force generated by the magnetic column 8 can attract the moving ring 3, so that the moving ring 3 tightly abuts against the stationary ring 7, thereby being able to seal the lubricating oil in the sealing cavity; when the device is in an operating state, the rotating shaft rotates, driving the blades to rotate and pumping away the lubricating oil in the sealing cavity. At the same time, the rotating shaft drives the moving ring 3 to rotate. Through the spiral groove 301 provided on the moving ring 3, the moving ring 3 and the stationary ring 7 can be separated from each other and form a stable gas film. This gas film can not only play a sealing role, but also avoid dry friction between the moving ring 3 and the stationary ring 7, thereby improving the service life of the present utility model.

[0029] In a further optimized solution, a first installation groove 501 arranged in a ring shape is provided along the circumference inside the end cover 5. An annular second installation groove 502 is provided along the circumference of the groove wall of the first installation groove 501. A second sealing ring 9 is installed in the second installation groove 502. The stationary ring seat 6 is hermetically fixed on the end cover 5 through the first installation groove 501 and the second sealing ring 9. The sealing connection between the stationary ring seat 6 and the end cover 5 is realized through the provided first installation groove 501, second installation groove 502 and second sealing ring 9.

[0030] For a further optimized solution, an installation groove three 601 arranged in a ring shape is provided along the circumference of the edge of the stationary ring seat 6, and the stationary ring 7 is fixedly embedded on the stationary ring seat 6 through the installation groove three 601. Through the provided installation groove three 601, the installation between the stationary ring 7 and the stationary ring seat 6 is realized.

[0031] For a further optimized solution, a plurality of installation grooves four 602 are provided inside the installation groove three 601, and the plurality of installation grooves four 602 are evenly arranged along the circumference of the stationary ring seat 6; the number of the magnetic force columns 8 is the same as that of the installation grooves four 602, and the two correspond to each other one by one; the magnetic force columns 8 are embedded on the stationary ring seat 6 through the installation grooves four 602.

[0032] For a further optimized solution, a seal ring three 10 is sleeved on the end cover 5, and the end cover 5 is hermetically connected to the equipment housing through the seal ring three 10. In this embodiment, the end cover 5 and the equipment housing are connected by means of bolts. The seal ring one 2, the seal ring two 9, and the seal ring three 10 are all set as O-rings.

[0033] In order to verify that the above technical solutions proposed by the present utility model can be realized, through experiments, the relationship between the number and specifications of the magnetic force columns 8, the interval between the magnetic force columns 8 and the moving ring 3, and the magnitude of the magnetic force generated between the magnetic force columns 8 and the moving ring 3 is obtained, as shown in Table 1.

[0034] Serial number Magnetic column specification Number of magnetic columns Magnetic force (at an interval of 1 mm) 1 Φ4 * 5 mm 4 3.2N 2 Φ4%5 mm 5 4.2N 3 Φ4%5 mm 8 6.8N 4 Φ4 * 5 mm 10 8.1N 5 Φ4 * 5 mm 12 9.7N 6 Φ4%5 mm 16 12.6N

[0035] Table 1

[0036] Note: In Table 1, the interval of 1 mm refers to the interval between the magnetic force column 8 and the moving ring 3, and the magnetic force magnitude refers to the magnetic force generated between the magnetic force column 8 and the moving ring 3.

[0037] The above-described embodiments are only descriptions of the preferred modes of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall all fall within the protection scope determined by the claims of the present utility model.

Claims

1. A magnetic non-contact mechanical sealing device, characterized in that: It comprises a positioning sleeve 1 (1), a sealing ring 1 (2), a moving ring (3), and a positioning sleeve 2 (4) which are sequentially sleeved on the rotating shaft of the device, wherein an end cover (5) is sleeved on the positioning sleeve 2 (4), and the end cover (5) is sealed and connected to the housing of the device; A stationary ring seat (6) is sealed and embedded on the inner side of the end cover (5), and a stationary ring (7) and a magnetic column (8) are embedded on the stationary ring seat (6); the magnetic column (8) corresponds to the dynamic ring (3), and a gap is provided between the two; the stationary ring (7) abuts against the dynamic ring (3), and a spiral groove (301) corresponding to the stationary ring (7) is circumferentially provided at the edge of the dynamic ring (3).

2. The magnetic non-contact mechanical sealing device according to claim 1, characterized in that: The inner side of the end cover (5) is provided with a mounting groove (501) arranged in an annular shape along the circumferential direction, the groove wall of the mounting groove (501) is provided with a mounting groove (502) arranged in an annular shape along the circumferential direction, a sealing ring (9) is provided in the mounting groove (502), and the stationary ring seat (6) is sealed and embedded in the end cover (5) through the mounting groove (501) and the sealing ring (9).

3. The magnetic non-contact mechanical sealing device according to claim 1, characterized in that: The edge of the stationary ring seat (6) is provided with a mounting groove three (601) arranged in an annular shape along the circumferential direction, and the stationary ring (7) is embedded in the stationary ring seat (6) through the mounting groove three (601).

4. The magnetic non-contact mechanical sealing device according to claim 3, characterized in that: A plurality of mounting grooves four (602) are provided on the inner side of the mounting groove three (601), and the plurality of mounting grooves four (602) are evenly arranged along the circumference of the stationary ring seat (6); the number of the magnetic columns (8) is the same as the number of the mounting grooves four (602), and the two correspond one to one; the magnetic columns (8) are embedded in the stationary ring seat (6) through the mounting grooves four (602).

5. The magnetic non-contact mechanical sealing device according to claim 1, characterized in that: The end cover (5) is provided with a sealing ring three (10), and the end cover (5) is sealedly connected to the device housing through the sealing ring three (10).

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