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Testing method of dry friction of oil-sealed lip mouth

A technology of sealing lip and test method, applied in the direction of testing wear resistance, etc., can solve the problems of reduced shaft eccentricity following ability, reduced oil seal durability, reduced interference, etc., to optimize formula design, strengthen process control, improve The effect of service life

Inactive Publication Date: 2013-06-26
QINGDAO TKS SEALING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the operation of the oil seal, when there is sufficient lubrication, the oil seal shows a state of fluid lubrication. At this time, the lip hardly wears out. However, when the oil seal is in the initial stage of starting operation, the lubricating oil has not yet reached the lip. At this time, the lip The mouth is in a state of dry friction, and this period lasts for more than 2 minutes; in addition, when there is insufficient lubricating oil, oil deterioration, foreign matter in the oil or intrusion of external dust, the lip wear is promoted; and the oil seal lip is worn once , the contact state between the lip and the shaft changes from line contact to belt contact, and the interference of the lip decreases, resulting in a decrease in the ability to follow the shaft eccentricity, thereby reducing the durability of the oil seal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The dry friction test method of oil seal lip includes the following steps:

[0025] The first step is to install the sample oil seal: install the mandrel of the rotating part of the oil seal rotary testing machine horizontally on the bearing and make it adjustable for eccentricity. The shaft eccentricity is 0.2mm, and the installation eccentricity is 0.2mm. Then use gasoline to wipe the sealing lips separately, and degrease the test shaft, then install the tested oil seal in the cavity of the oil seal rotary testing machine, and the material of the tested oil seal lip is fluororubber;

[0026] The second step is to set the test environment conditions: measure the main lip size of the oil seal to be tested, take the maximum designed interference of the main lip of the oil seal to be tested, which is 1.5mm, set the test temperature to normal temperature, and set the test pressure As the standard atmospheric pressure, set the rotational speed of the shaft as 15m / s, and set...

Embodiment 2

[0032] The dry friction test method of oil seal lip includes the following steps:

[0033] The first step is to install the sample oil seal: install the mandrel of the rotating part of the oil seal rotary testing machine horizontally on the bearing and make it adjustable for eccentricity. The shaft eccentricity is 0.2mm, and the installation eccentricity is 0.2mm. Then wipe the sealing lips with gasoline, and degrease the test shaft, then install the tested oil seal in the cavity of the oil seal rotary testing machine, the material of the tested oil seal lip is silicone rubber;

[0034] The second step is to set the test environment conditions: measure the main lip size of the oil seal to be tested, take the maximum designed interference of the main lip of the oil seal to be tested, which is 1.45mm, set the test temperature to normal temperature, and set the test pressure As the standard atmospheric pressure, set the rotational speed of the shaft as 15m / s, and set the test tim...

Embodiment 3

[0040] The dry friction test method of oil seal lip includes the following steps:

[0041]The first step is to install the sample oil seal: install the mandrel of the rotating part of the oil seal rotary testing machine horizontally on the bearing and make it adjustable for eccentricity. The shaft eccentricity is 0.2mm, and the installation eccentricity is 0.2mm. Then wipe the sealing lips with gasoline, and degrease the test shaft, and then install the tested oil seal in the cavity of the oil seal rotary testing machine. The material of the tested oil seal lip is acrylic rubber;

[0042] The second step is to set the test environment conditions: measure the main lip size of the oil seal to be tested, take the maximum design interference of the main lip of the oil seal to be tested, which is 1.6mm, set the test temperature to normal temperature, and set the test pressure As the standard atmospheric pressure, set the rotational speed of the shaft as 15m / s, and set the test time...

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Abstract

The invention relates to a testing method of friction characteristics, especially a testing method of dry friction of an oil-sealed lip mouth, characterized in that: an oil seal gyratory testing machine is used, that is, an oil seal is arranged on the oil seal gyratory testing machine for operating under certain conditions, according to the wear of the lip mouth of the lip and the shaft of the oil seal under test in degreasing state, the dry friction performance of the oil seal is evaluated. The testing method is reliable, and the steps are designed reasonablely. According to the method, the wear resisting property of the rubber seal material in application is effectively verified; the technical personals can select proper rubber material and optimize formula design according to testing and producing in design stage of the oil seal product; the design value of magnitude of interference, structural style and design parameters of the oil seal main lip can be determined effectively and correctly; the dry friction testing can be carried out through sampling inspection of normally produced oil seal products at any time; the process control is strengthened, the product quality is guaranteed, and the service life of the oil seal is prolonged.

Description

technical field [0001] The invention relates to a friction characteristic test method, in particular to a dry friction test method for sealing lips of an oil seal. Background technique [0002] During the operation of the oil seal, when there is sufficient lubrication, the oil seal shows a state of fluid lubrication. At this time, the lip hardly wears out. However, when the oil seal is in the initial stage of starting operation, the lubricating oil has not yet reached the lip. At this time, the lip The mouth is in a state of dry friction, and this period lasts for more than 2 minutes; in addition, when there is insufficient lubricating oil, oil deterioration, foreign matter in the oil or intrusion of external dust, the lip wear is promoted; and the oil seal lip is worn once , the contact state between the lip and the shaft is changed from line contact to belt contact, and the interference of the lip is reduced, resulting in a decrease in the ability to follow the shaft eccen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/56
Inventor 韩悦琴张波
Owner QINGDAO TKS SEALING IND