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shaft seal

A technology of seals and shaft seals, used in engine seals, pump components, engine components, etc., to solve problems such as increased component cooling, increased risk of coking, and poor exhaust temperature leakage

Active Publication Date: 2016-04-13
TURBO SYST SWITZERLAND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coking risk increases with rising exhaust gas temperature and increased leakage through piston rings and poor component cooling

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0063] figure 1 An exhaust-gas turbocharger according to the prior art is shown with a radial compressor 70 and an axial turbine 10 . The housing of the exhaust-gas turbocharger is shown partially cut away so that the rotor with compressor wheel 71 , shaft 20 and turbine wheel 11 can be seen. The air conduction from the air inlet 72 to the compressor wheel 71 is illustrated with thick arrows. On the turbine side, the hot exhaust gas is guided via the intake opening 12 via the turbine wheel 11 to the exhaust opening 13 . The shaft 20 is rotatably mounted in a bearing housing 30 , usually by means of two radial bearings and at least one axial bearing.

[0064] figure 2 A shaft seal according to the prior art is shown which separates a cavity 50 in the bearing housing from the wheel rear space 15 of the turbine wheel 11 . In this case, the bearing housing includes an insert 31 (sealing bush) in the region of the shaft seal, which is realized as a separate component. The ins...

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PUM

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Abstract

The invention relates to a shaft seal comprising an impeller-side seal in the form of at least one piston ring and a bearing-side seal in the form of a sealing gap. An oil discharge chamber is arranged between the impeller-side seal and the carrier-side seal, which is delimited by a third seal in the form of a sealing gap. A gas exit cavity is arranged between the third seal and the impeller side seal. The sleeve has a contour that, together with the bearing housing, forms an oil discharge chamber and a gas outlet chamber and includes at least one groove for receiving at least one piston ring. The sleeve has two axially spaced radially force-transmittable support regions facing the shaft, the one of the two support regions which is arranged on the impeller side is arranged axially on at least one piston ring of the seal on the impeller side in the area. By replacing the long continuous seat with two short seats at the respective ends of the sleeve, the contact surface between the shaft and the bearing sleeve and thus the heat input by the impeller through the shaft can be reduced.

Description

technical field [0001] The invention relates to the field of fluid machines, in particular exhaust-gas turbochargers, which are loaded with the exhaust gas of an internal combustion engine. [0002] The invention relates to such a hydromechanical shaft seal. Background technique [0003] To increase the power of the internal combustion engine, exhaust-gas turbochargers are currently used as standard, with a turbine in the exhaust tract of the internal combustion engine and with a compressor upstream of the internal combustion engine, which is connected to the turbine via a common shaft. With supercharging of the internal combustion engine by means of an exhaust-gas turbocharger, the filling quantity in the cylinders and thus the fuel mixture is increased and thus a considerable power increase for the engine is obtained. Optionally, the energy incorporated in the exhaust gas of the internal combustion engine can be converted into electrical or mechanical energy by means of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D11/00F04D29/10F16J15/16
CPCF01D11/003F05D2220/40F05D2240/581F01D25/00F01D25/28F02B39/00
Inventor A.瓦卡T.雷钦
Owner TURBO SYST SWITZERLAND LTD