Spiral framework oil seal

Abstract

A spiral framework oil seal relates to the technical field of mechanical seal and is characterized in that an oil seal body (2) is annular, spiral lines (3) are arranged on the inner wall of the oil seal body (2), sealing lip lines (4) protruding inwards are arranged at the opening edge, close to the outer side, of the inner wall of the oil seal body (2), the sealing lip lines (4) and the spiral lines (3) are arranged at intervals, and the spiral lines (3) and the spiral lines (3) are arranged at intervals to form flow guide grooves (5). A framework embedding groove (6) is formed in the end face, close to the inner side, of the oil seal body (2), the framework (1) is a hollow annular body provided with a U-shaped cavity (7) with one end open, the framework (1) is embedded in the framework embedding groove (6) of the oil seal body (2), the opening direction of the framework (1) is consistent with that of the framework embedding groove (6), and an oil return hole (8) is formed in the bottom of the flow guide groove (5) and communicated with the U-shaped cavity (7) of the framework (1). The sealing device is simple in structure, reasonable in design, reliable in operation and good in sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, and particularly relates to a spiral skeleton oil seal. Background Art

[0002] In mechanical equipment, especially in motor equipment, for components with relative movement, due to factors such as wear or corona discharge, the existing old-fashioned skeleton oil seals cannot achieve good sealing effects. For the existing old-fashioned skeleton oil seals, the sealing lip line adopts an annular integral sealing lip line, which cannot effectively guide the lubricating medium back into the bearing bush. Due to the long-term operation of rotating equipment and the entry of external dust, the sealing lip line of the old-fashioned skeleton oil seal is worn or corona-aged, resulting in excessive wear of the radial clearance between the sealing lip line of the oil seal and the rotating shaft, and it is extremely easy to have serious oil leakage problems. Summary of the Invention

[0003] The technical problem to be solved by the utility model is: to provide a spiral skeleton oil seal with good sealing effect to overcome the oil leakage problem of the existing skeleton oil seal caused by wear or corona.

[0004] The technical solution of the utility model is: a spiral skeleton oil seal, including an oil seal body provided with a skeleton, the oil seal body is annular, the inner wall of the oil seal body is provided with a spiral line with a toothed cross-section and protruding inward, the edge of the inner wall of the oil seal body near the outside is provided with a sealing lip line protruding inward, the sealing lip line and the spiral line are arranged at intervals, and the spiral lines are arranged at intervals to form a diversion groove, the end face of the oil seal body near the inside is provided with a skeleton embedding groove, the skeleton is a hollow ring body with a "U" - shaped cavity with one end open, the skeleton is embedded in the skeleton embedding groove of the oil seal body, the opening direction of the skeleton is consistent with the skeleton embedding groove, and the diversion groove is provided with an oil return hole at the bottom position to communicate with the "U" - shaped cavity of the skeleton.

[0005] The technical effect of the utility model is: it has the problems of simple structure, reasonable design, reliable operation and good sealing effect. Since the radial clearance between the sealing lip line of the spiral skeleton oil seal and the rotating shaft is an appropriate interference fit, direct wear is avoided. When the equipment is running or stopped, a very reliable sealing effect can be achieved through the structure of the sealing lip line of the spiral skeleton oil seal. Brief Description of the Drawings

[0006] Figure 1 It is a schematic cross-sectional structure diagram of the utility model. Detailed Description of the Invention

[0007] Such as Figure 1As shown in the figure, a spiral skeleton oil seal includes an oil seal body 2 provided with a skeleton 1. The oil seal body 2 is annular. The inner wall of the oil seal body 2 is provided with a spiral line 3 with a toothed cross-section and protruding inward. At the edge of the inner wall of the oil seal body 2 near the outer side, there is a sealing lip line 4 protruding inward. A distance is provided between the sealing lip line 4 and the spiral line 3 and between the spiral lines 3 to form a diversion groove 5. The end face of the oil seal body 2 near the inner side is provided with a skeleton embedding groove 6, and the skeleton embedding groove is coaxially arranged with the oil seal body. The skeleton 1 is a hollow ring body with a "U"-shaped cavity 7 with one end open, and the "U"-shaped cavity is coaxially arranged with the skeleton. The skeleton 1 is embedded in the skeleton embedding groove 6 of the oil seal body 2, and the opening direction of the skeleton 1 is the same as that of the skeleton embedding groove 6. The diversion groove 5 is provided with an oil return hole 8 at the bottom position to communicate with the "U"-shaped cavity 7 of the skeleton 1. The sealing lip line plays a role in preventing external dust from entering.

[0008] The cross-section of the spiral line 3 is triangular.

[0009] The tooth tip of the spiral line 3 is inclined towards the inner end of the oil seal body 2.

[0010] The cross-section of the sealing lip line 4 is triangular.

[0011] The material of the oil seal body 2 is oil-resistant nitrile rubber or polytetrafluoroethylene. It improves the problem of corona aging.

[0012] When the equipment rotates, when the lubricating medium overflowing axially along the bearing bush encounters the spiral skeleton oil seal, under the interaction between the spiral line and the rotating shaft, it is directly beaten back into the bearing bush. The lubricating medium remaining in the diversion groove between the spiral lines enters the skeleton cavity through the lower oil return hole and flows back into the bearing bush.

Claims

1. A spiral skeleton oil seal, comprising an oil seal body (2) provided with a skeleton (1), characterized in that, The oil seal body (2) is annular. A spiral line (3) with a toothed cross-section and protruding inward is provided on the inner wall of the oil seal body (2). A sealing lip line (4) protruding inward is provided at the outer edge of the inner wall of the oil seal body (2). The sealing lip line (4) and the spiral line (3) are arranged at intervals, and the spiral lines (3) are arranged at intervals to form a diversion groove (5). A skeleton inlay groove (6) is provided on the inner end face of the oil seal body (2). The skeleton (1) is a hollow annular body with a "U"-shaped cavity (7) with one end open. The skeleton (1) is embedded in the skeleton inlay groove (6) of the oil seal body (2). The opening direction of the skeleton (1) is the same as that of the skeleton inlay groove (6). An oil return hole (8) is provided at the bottom of the diversion groove (5) and is communicated with the "U"-shaped cavity (7) of the skeleton (1).

2. The spiral skeleton oil seal according to claim 1, wherein The cross-section of the spiral line (3) is triangular.

3. The spiral skeleton oil seal according to claim 2, wherein The tooth tip of the spiral line (3) is inclined towards the inner end of the oil seal body (2).

4. The spiral skeleton oil seal according to claim 1, wherein The cross-section of the sealing lip line (4) is triangular.

5. The spiral skeleton oil seal according to any one of claims 1 to 4, characterized in that, The material of the oil seal body (2) is oil-resistant nitrile rubber or polytetrafluoroethylene.

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