Integrated type automotive mixed flow turbosuperchager

Abstract

The invention provides an integrated type automotive mixed flow turbosuperchager which comprises a rotating structure, a bearing structure, a bearing pedestal and a shell mechanism. The rotating mechanism comprises a rotating shaft, a turbine and an impeller, wherein the turbine and the impeller are arranged at the two ends of the rotating shaft. The bearing structure comprises a floating bearing and a thrust bearing which are annularly arranged in the middle of the rotating shaft. The bearing structure is sleeved with the bearing pedestal. The shell mechanism comprises an integrated type turbine shell arranged on the outer side of the turbine and the outer side of the bearing pedestal in a sleeving manner, an impeller shell arranged on the outer side of the impeller in a sleeving manner and a back plate connected with the integrated type turbine shell and the impeller shell. A vortex channel is arranged in the integrated type turbine shell, vortex channel outline areas of sections at different angles of the vortex channel are distributed linearly, and the vortex channel outline area of the section at the 0 degree is the minimum. The distance between the outmost edge of the turbine and the center axis of the rotating shaft is gradually increased from a turbine inlet to a turbine outlet, and the distance between the outmost edge of the position, corresponding to a turbine throat, of the turbine and the center axis of the rotating shaft is the maximum. The turbine shell and a bearing shell are integrated into the integrated type turbine shell, and therefore remarkable beneficial effects are obtained.

Description

technical field [0001] The invention relates to the field of vehicle machinery, in particular to a supercharger, in particular to an integrated vehicle mixed-flow turbocharger. Background technique [0002] During the development of the internal combustion engine, the application of turbocharging technology has played an important role in improving the specific power of the internal combustion engine and reducing the emission of the internal combustion engine. Judging from the current development of turbocharging technology, the radial flow turbocharger has reached a very high technical level. The specific speed of the type turbine is getting higher and higher, but its efficiency cannot reach the optimum value. If the specific speed is reduced, although this problem can be solved, it will increase the diameter of the impeller, thus affecting the performance of the supercharger. Transient responsiveness. In comparison, the mixed-flow turbocharger can not only improve the de...

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Problems solved by technology

[0006] Based on the above background, in order to overcome various disadvantages existing in the actual application process of the prior art, the present invention provides an integrated vehicle mixed-flow turbocharger, by integrating the traditional turbine housing and bearing housing into an integrated turbine Shell, omitting the connection between the traditional bearing shell and the turbine shell, greatly reducing the risk of air leakage and deformation; further, the improved integrated turbine shell effectively solves the problems caused by the structural constraints of various components The limited design of the vortex channel satisfies the requirement that the design of the vortex channel can perfectly adapt to the needs of the mixed-flow turbocharger, thereby greatly improving the working efficiency of the mixed-flow turbocharger; in addition, the mixed-flow turbocharger with a new structure can be used A turbine with a smaller outer diameter simultaneously obtains the same flow rate as a traditional turbine, resulting in lower turbine inertia and better low-speed response performance

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