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Sealing device and bearing device provided with the same

A technology for sealing devices and bearing devices, which is applied in the field of bearing devices and sealing devices, and can solve problems such as reduced bearing life and reduced sealing performance of sealing devices

Inactive Publication Date: 2020-10-30
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the sealing performance of the sealing device decreases, and water or foreign matter enters the inside of the bearing, which may shorten the life of the bearing.

Method used

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  • Sealing device and bearing device provided with the same
  • Sealing device and bearing device provided with the same
  • Sealing device and bearing device provided with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Hereinafter, embodiments of the sealing device and the bearing device including the sealing device according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the above-mentioned illustration, It is disclosed by a claim, and all changes within the meaning and range equivalent to a claim are included.

[0027] figure 1 It is a cross-sectional explanatory view showing the structure of a bearing device 2 provided with a sealing device 1 according to an embodiment of the present invention, figure 2 yes figure 1 An enlarged cross-sectional explanatory view of the sealing device 1 shown. The bearing device 2 is a rolling bearing device that is provided on roll necks (not shown) at both ends of a roll for a rolling mill to rotatably support the roll. The bearing device 2 includes an outer ring 3 , an inner ring 4 , tapered rollers 5 as rolling elements, a cage 6 , and a sealing device 1 .

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Abstract

The invention provides a sealing device and a bearing device provided with the sealing device. In a bearing device with an outer ring (3) and an inner ring (4), the sealing device provided at both ends of the outer ring (3) in the axial direction has: a main sealing lip (7), which is connected to the inner ring The outer peripheral surface of the inner ring (4) is in contact with; and the secondary sealing lip (8) is arranged on the axial inner side of the main sealing lip (7) and does not contact the outer peripheral surface of the inner ring (4). An annular grease reservoir (10) capable of accumulating grease is formed by the outer peripheral surface of the inner ring (4), the primary seal lip (7) and the secondary seal lip (8). On at least one of the radially outer surface (8b) and the radially inner surface (8c) of the secondary sealing lip (8), a plurality of guiding portions are formed along the circumferential direction, and the guiding portions can be attached to Grease on this surface flows in the axial direction.

Description

technical field [0001] The present invention relates to a sealing device and a bearing device provided with the sealing device. More specifically, it relates to a sealing device used in a bearing device for supporting rolls of, for example, a rolling mill, and a bearing device using the sealing device. Background technique [0002] Sealing devices for roll neck bearings of steel rolling mills are often used under harsher conditions than general sealing devices. That is, the circumferential speed of the lip portion reaches a maximum of 30 m / s (rolling speed: 2800 mpm), and the ambient temperature repeatedly changes within a wide temperature range of, for example, 60 to 120°C. In addition, continuous immersion in rolling water (cooling water). [0003] In order to ensure the sealing performance of the seal even under such severe conditions, it is important to maintain the lubricated state of the gap between the inner ring and the lip that is in sliding contact with the outer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/78F16J15/3232
CPCF16C33/7813F16C33/7886F16J15/3232F16C2322/12B21B31/078F16C33/7809F16C33/7823F16C33/6603F16C19/38B21B2203/24
Inventor 清水阳平
Owner JTEKT CORP
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