Oil seal for automobile rear axle assembly

An automobile rear axle and assembly technology, applied to the sealing of the engine, mechanical equipment, engine components, etc., can solve problems such as harsh working environment, and achieve the effects of good corrosion resistance, increased service life, and high hardness

Inactive Publication Date: 2014-11-19
宁国天运橡塑制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the automobile rear axle assembly, the working environment is harsh, and the requirements for oil seals are high. Not only must they be resistant to corrosion and wear, but they must also withstand high operating temperatures. The oil seals in the prior art need to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] An oil seal for an automobile rear axle assembly, including a metal skeleton and a rubber layer wrapped on the surface of the metal skeleton. The components and weight percentages of the metal skeleton are: C: 3.0%, Mn: 2.2%, Cr: 5.0%, Si: 1.6%, Mo: 0.4%, Ba: 1.2%, S: 0.02%, P: 0.02%; the balance is Fe; the components of the rubber layer and their weight ratio composition: nitrile rubber 40:34 parts, nitrile rubber 18: 16 parts, PVC: 12 parts, antioxidant RD: 2.0 parts, DTDM: 1.6 parts, zinc oxide: 4.2 parts, graphite: 4 parts, stearic acid: 1.6 parts, white carbon black: 38 parts, accelerator DM : 1.4 parts, Accelerator CZ: 1.5 parts.

[0018] Nitrile rubber 40 has good heat resistance, wear resistance and oil resistance. In order to take into account the low-temperature performance of the material, it is realized by adding a part of nitrile rubber 18, which can also improve the elasticity of the product and have an appropriate expansion volume, which is conducive to ...

Embodiment 2

[0021] An oil seal for an automobile rear axle assembly, including a metal skeleton and a rubber layer wrapped on the surface of the metal skeleton. The components and weight percentages of the metal skeleton are: C: 3.0%, Mn: 2.4%, Cr: 4.8%, Si: 11.6%, Mo: 0.4%, Ba: 1.4%, S: 0.01%, P: 0.01%; the balance is Fe; the components of the rubber layer and their weight ratio composition: nitrile rubber 40:34 parts, nitrile rubber 18: 18 parts, PVC: 10 parts, antioxidant RD: 2.0 parts, DTDM: 1.4 parts, zinc oxide: 4.4 parts, graphite: 2 parts, stearic acid: 1.8 parts, white carbon black: 35 parts, accelerator DM : 1.4 parts, Accelerator CZ: 1.4 parts.

Embodiment 3

[0023] An oil seal for an automobile rear axle assembly, including a metal skeleton and a rubber layer wrapped on the surface of the metal skeleton. The components and weight percentages of the metal skeleton are: C: 3.1%, Mn: 2.2%, Cr: 5.0%, Si: 1.4%, Mo: 0.6%, Ba: 1.2%, S: 0.01%, P: 0.02%; the balance is Fe; the components of the rubber layer and their weight ratio composition: nitrile rubber 40:36 parts, nitrile rubber 18: 16 parts, PVC: 12 parts, antioxidant RD: 1.8 parts, DTDM: 11.6 parts, zinc oxide: 4.2 parts, graphite: 4 parts, stearic acid: 1.6 parts, white carbon black: 38 parts, accelerator DM : 1.2 parts, Accelerator CZ: 1.6 parts.

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Abstract

The invention discloses an oil seal for an automobile rear axle assembly. The oil seal comprises a metal skeleton and a rubber layer coating the surface of the metal skeleton. The ingredients of the metal skeleton include, by weight percentages: 3.0 to 3.1% of C, 2.2 to 2.4% of Mn, 4.8 to 5.0% of Cr, 1.4 to 1.6% of Si, 0.4 to 0.6% of Mo, 1.2% to 1.4% of Ba, not smaller than 0.02% of S, not smaller than 0.02% of P, and the balance of Fe. The ingredients of the rubber layer include, by weight ratios: 34 to 36 parts of acrylonitrile butadiene rubber 40, 16 to 18 parts of acrylonitrile butadiene rubber 18, 10 to 12 parts of PVC, 1.8 to 2 parts of antioxidant RD, 1.4 to 1.6 parts of DTDM, 4.2 to 4.4 parts of zinc oxide, 2 to 4 parts of graphite, 1.6 to 1.8 parts of stearic acid, 35 to 38 parts of white carbon black, 1.2 to 1.4 parts of accelerator DM and 1.4 to 1.6 parts of accelerator CZ. The rubber layer has high heat resistance, wear resistance, corrosion resistance and hardness, the fracture strength is larger than 16 MPa, the volume change rate is lower than 8%, the hardness ranges from 82 to 85 degrees, the metal skeleton has high hardness and wear resistance, and the service life of the oil seal is prolonged by 2 to 2.5 times.

Description

technical field [0001] The invention relates to the technical field of oil seals, in particular to an oil seal for an automobile rear axle assembly. Background technique [0002] The oil seal is a mechanical component used to seal oil, which isolates the parts that need to be lubricated from the output parts in the transmission parts, so that the lubricating oil will not leak. The representative form of oil seal is TC oil seal, which is a double-lip oil seal with self-tightening spring fully covered by rubber. [0003] The oil seal is the rubber component with the most complex structure and the most important application of the rotary seal. It prevents the leakage of the lubricating oil chamber of the bearing through the contact between the flexible sealing lip and the housing, and also prevents the intrusion of foreign objects such as external dust and muddy water. [0004] In the automobile rear axle assembly, the working environment is harsh, and the requirements for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/16C22C38/38C08L9/02C08L27/06C08K3/22C08K3/04C08K3/36
Inventor 吴延福
Owner 宁国天运橡塑制品有限公司
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