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bearing

A technology for bearings and axial extension, applied to bearings, shafts and bearings, bearing components, etc., can solve the problem that the sealing structure cannot realize contact sealing and non-contact sealing at the same time

Active Publication Date: 2019-01-18
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is: the sealing structure of the existing bearing cannot realize the advantages of contact sealing and non-contact sealing at the same time

Method used

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Experimental program
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Effect test

no. 1 example

[0028] Such as figure 1 As shown, the bearing of this embodiment is an outer ring rotary bearing, including: a non-rotating inner ring 1; a rotating outer ring 2; a sealing structure 3 located in the radial gap between the inner ring 1 and the outer ring 2 (not Mark), and seal the bearing at the axial end of the bearing. The sealing structure 3 includes: a static sealing ring 31 and a dynamic sealing ring 32 coaxially sleeved.

[0029] The static sealing ring 31 includes: a contact ring 311 extending radially along the bearing; a retaining ring 312 extending from the radially inner peripheral edge of the contact ring 311 in the axial direction of the bearing and fixed on the outer peripheral surface of the inner ring 1; The radially outer peripheral edge of the second suspension ring 313 extends axially along the bearing, and the extension direction of the second suspension ring 313 is opposite to that of the retaining ring 312 . In a specific embodiment, the contact ring 31...

no. 2 example

[0055] Such as figure 2 As shown, the bearing of this embodiment is an inner ring rotary bearing, including: a rotating inner ring 4; a non-rotating outer ring 5; a sealing structure 6 located in the radial gap between the inner ring 4 and the outer ring 5, And seal the bearing at the axial end of the bearing. The sealing structure 6 includes: a static sealing ring 61 and a dynamic sealing ring 62 coaxially sleeved.

[0056] The static seal ring 61 includes: a contact ring 611 extending radially from the bearing; a second retaining ring 612 extending from the radially outer peripheral edge of the contact ring 611 along the axial direction of the bearing and fixed on the inner peripheral surface of the outer ring 5; The radially inner peripheral edge of the contact ring 611 is a suspension ring 613 extending axially along the bearing. The extension direction of the suspension ring 613 is opposite to that of the second holding ring 612 .

[0057] The dynamic sealing ring 62 i...

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PUM

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Abstract

A bearing, comprising: a non-rotating inner ring; a rotating outer ring; a sealing structure located in the radial gap between the inner and outer rings and including static and dynamic sealing rings sleeved coaxially; the static sealing ring is fixed On the outer peripheral surface of the inner ring and includes a contact ring; the dynamic sealing ring includes an annular body part and an elastic seal; the body part includes a resisting ring, and a connecting ring connected to the resisting ring and located on the radial inner side thereof, and the connecting ring is located on the axis of the contacting ring Inwardly, the inner cavity is surrounded by the resisting ring, the connecting ring and the contact ring, and the elastic seal is fixed on the connecting ring and includes a sealing lip protruding into the inner cavity; when the rotation speed of the outer ring is less than a critical value, the sealing lip and the contacting The ring is in contact and has a radial gap with the resisting ring; when the rotation speed of the outer ring is not less than a critical value, the sealing lip breaks away from the contact ring and abuts against the resisting ring, so that the sealing lip and the static sealing ring form a non-contact seal. The problem that the sealing structure of the existing bearing cannot realize the advantages of contact sealing and non-contact sealing at the same time is solved.

Description

technical field [0001] The invention relates to a bearing. Background technique [0002] There are two types of existing bearing seals: contact seals and non-contact seals. The criteria for evaluating the sealing effect of bearings are: the ability to prevent external pollutants from entering the bearing and the ability to prevent lubricant leakage in the bearing. [0003] The contact seal has the advantage of good sealing effect, but it has the disadvantage that it is not suitable for sealing bearings under high-speed rotation conditions. The reason is that there will be a large friction torque between the sealing structure and other parts in the bearing, not only A large amount of heat will be generated to accelerate the aging of the sealing structure, and it will also cause relatively serious wear to the sealing structure, resulting in a reduction in the service life of the sealing structure. [0004] The non-contact seal has the advantage of being suitable for sealing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/78
CPCF16C33/7823F16C33/805F16J15/164F16J15/3264F16C33/80F16C27/066F16C33/768F16C2208/10
Inventor 刘鑫
Owner SCHAEFFLER TECH AG & CO KG