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Oil seal and bearing comprising same

An oil seal and bearing technology, applied in the field of oil seals and bearings including the oil seal, can solve the problems of wear, the temperature range of oil seal materials cannot meet the requirements of intake air temperature, etc., and achieve the effects of simple production method, simple structure and reduced production cost.

Inactive Publication Date: 2014-09-24
史建伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bearing oil seal used in the existing throttle body has only one sealing surface, and the temperature range of the oil seal material can no longer meet the intake air temperature requirements of modern turbocharged engines
When the intake pressure continues to increase, the existing oil seal will move to the inside of the bearing under the pressure and contact with the frame, causing wear

Method used

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  • Oil seal and bearing comprising same
  • Oil seal and bearing comprising same
  • Oil seal and bearing comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the section of the oil seal of the present invention is in the shape of "K", and the center of the section of the oil seal is a twist point 1, and there are two or more points extending outward from the twist point 1 on the twist point 1. The legs 2 form two or more sealing surfaces with gaps between them; a plurality of steps 4 are provided on the outer surface of the oil seal in contact with the bearing housing 7, forming a plurality of steps 4 between the oil seal and the bearing housing 7 Sealing surface. The structure of the oil seal is simple, and the production method is simple and convenient, and only two 2-cavity molds conforming to the shape of the oil seal are used.

[0034] Install the two oil seals in the bearing housing 7 to form a complete bearing with the shaft and the needle roller 10. For the sake of description and clarity, the two oil seals are respectively named as the first oil seal 5 and the second oil seal 6 . Prefer...

Embodiment 2

[0037] Such as figure 2 As shown, on the basis of Embodiment 1, a flange extending along the outer surface of the first oil seal 5 is provided on the outer surface of the first oil seal 5 on one side of the bearing in contact with the bearing shell 7, and the bearing shell 7 The position where the first oil seal 5 is installed on the inner side is provided with a groove 8 conforming to the shape of the protrusion 3 on the outer surface of the first oil seal 5 . Such as image 3 As shown, when the first oil seal 5 is assembled into the bearing housing 7, the flange on the outer surface of the first oil seal 5 is embedded into the groove 8 on the bearing housing 7 to form an interlocking structure. When the shaft is pushed into the bearing shell 7, the first oil seal 5 is not turned over, which can prevent the first oil seal 5 from slipping into the bearing frame 9 under the action of pressure. The multiple steps 4 provided on the outer surface of the second oil seal 6 on the...

Embodiment 3

[0040]On the basis of the above embodiments, the diameter of the needle roller 10 used in the bearing is 7%-36% smaller than the diameter of the needle roller 10 in the same specification bearing. In order to reduce the sealing volume and the overall packaging size, the production cost of the oil seal is further reduced. The small sealing volume makes it possible to increase the length of the needle roller 10 in the bearing of the same size. By reducing the diameter of the needle roller 10, more needle rollers 10 can be accommodated in the same size space; the length is longer, A larger number of needle rollers 10 makes the contact area between the needle rollers 10 and the bearing shell 7 larger, thereby reducing the pressure on the contact surface, allowing the bearing shell 7 to adopt a non-hardened bearing shell 7 . Preferably, the diameter of the shaft of the bearing is 8-10 mm, and the diameter of the needle roller 10 is 1.4-0.95 mm. When the diameter of the shaft is 10...

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Abstract

The invention provides an oil seal and a bearing comprising the same. The cross section of the oil seal is K-shaped; the center of the cross section of the oil seal is a turning point; two or more legs extending outwards from the turning point are arranged on the turning point to form two or more seal surfaces among which gaps are formed. The oil seal provided by the invention has excellent seal effect, is suitable for relatively wide temperature range and pressure range, can withstand high pressure from two directions, and is low in cost; the oil seal in the bearing cannot be turned over easily due to matching manner with the bearing casing, and is good in seal property.

Description

technical field [0001] The invention relates to the field of seals and bearings, in particular to an oil seal and a bearing comprising the oil seal. Background technique [0002] As the next generation of engines requires more turbocharging and exhaust gas recirculation, the parts of the engine intake system need to withstand higher temperatures and pressures. The bearing oil seal used in the existing throttle body has only one sealing surface, and the temperature range of the oil seal material can no longer meet the intake air temperature requirements of modern turbocharged engines. When the intake pressure continues to increase, the existing oil seal will move to the inside of the bearing under the pressure and contact with the frame, causing wear and tear. Contents of the invention [0003] In order to develop an oil seal suitable for a new generation of engines, the invention provides an oil seal and a bearing comprising the oil seal. The oil seal has a good sealing e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/16F16C33/78
Inventor 约翰·诺曼·斯托布里奇李金浩桓润农
Owner 史建伟