CN104956045A

CN104956045A - A turbocharger internal turbine heat shield having axial flow turning vanes

Info

Publication number: CN104956045A
Application number: CN201380071893.2A
Authority: CN
Inventors: B·弗雷泽
Original assignee: BorgWarner Inc
Current assignee: BorgWarner Inc
Priority date: 2013-02-19
Filing date: 2013-02-19
Publication date: 2015-09-30
Also published as: KR20150117690A; US20160003096A1; WO2014130006A1; DE112013006386T5

Abstract

A turbocharger internal heat shield (1) is provided having axial flow turning vanes (2). Additionally, the heat shield may have a volute divider wall extender (5).

Description

There is the turbosupercharger inner turbine machine heat screen of axial flow rotor blade

Background of invention

The explanation of correlation technique

Turbosupercharger is a kind of forced induction system used together with explosive motor.Compressed air is sent to engine charge end thus allows the more fuel of burning by turbosupercharger, does not increase the weight of motor significantly because this increasing the horsepower of motor.Therefore, turbosupercharger allows to use less motor and forms the horsepower with the identical amount of motor that is larger, normal suction.Use in vehicle and there is reduction vehicle mass compared with puffer, improve performance and strengthen effect desired by fuel economy.In addition, use turbosupercharger to allow the fuel more perfect combustion being delivered to motor, this contributes to this target of highly wishing realizing more cleaning ambient.

The central bearing housing that turbosupercharger typically comprises the turbine cylinder be connected on the gas exhaust manifold of motor, is connected to a compressor housing in the intake manifold of motor and this turbine cylinder and compressor housing is linked together.A turbine wheel in turbine cylinder is rotatably driven by the exhaust inlet stream of supplying from this gas exhaust manifold.This turbine wheel is connected on a compressor impeller in this compressor housing by the axle be rotatably supported in this central bearing housing, makes the rotation of this turbine wheel cause the rotation of this compressor impeller like this.The axis limit that this turbine wheel is connected with this compressor impeller spin axis.When compressor impeller rotates, which increase and be delivered to the mass air flow rate of engine cylinder, airflow density and air pressure via engine intake manifold.

In turbosupercharger, this turbine wheel or can be radial flow impeller, in this radial flow impeller, the radius be vented along this impeller is directed; Or can be aial flow impeller, in this aial flow impeller, the axis be vented along this turbine wheel be directed.Usually, bearing housing is by a heat screen from the impact carrying out self-purging heat, and this heat screen is disposed between this turbine wheel and this bearing housing.

US 7,631,497 relate to the turbosupercharger with the heat screen between this turbine wheel and this bearing housing, and wherein, this heat screen defines the space between this turbine wheel and this heat screen and is equipped with at least one to extend to rib in this air.In this space, in the heat screen of conventional planar, can work in the mode of centrifugal pump in this turbine wheel back side, thus the adjacent reduced pressure zone of the outer side surface pumping out gas in this space, produce and this turbine bearing(s) and by oil sucking-off and being drawn in the space between this turbine wheel back side and this heat screen from this bearing.Heat screen of the present invention has multiple protruding structure, and these protruding structures are designed to rotation between interference heat screen and the turbine wheel back side in space and centrifugal gas flow, and then prevent oil bypass from passing through.

US 6,739,134 relate to a kind of exhaust turbine supercharger for explosive motor, this exhaust turbine supercharger there is a turbo machine in air outlet flue and in intake duct by this turbine driven compressor, this turbo machine has a flow channel, this flow channel is with Radial Flow entrance section and one and half axial flow entrance sections and provide a flow ring, and this flow ring limits these two flowing entrance sections.This turbo machine is equipped with different turbo machine geometrical shapies for the variable adjustment of flowing entrance section.For raising the efficiency, this flow ring position in the housing of this exhaust turbine supercharger is variable adjustment.

Invention field

The present invention relates to a kind of turbosupercharger for explosive motor.More particularly, the present invention relates to the turbosupercharger of the internal partition heat shielding that there is axial turbine wheel and there is rotor blade.Optionally, for double-exhaust spiral case, this heat screen can have a partition wall stretcher.

Summary of the invention

In many turbosupercharger, exhaust is sent to this turbosupercharger with the direction radial for turbine wheel by exhaust volute.In the turbosupercharger with axial turbine impeller, be necessary to be redirect to axial direction before exhaust arrives this turbine wheel.Find, the heat screen with rotor blade can be used exhaust to be redirected or guided it before exhaust arrives this turbine wheel.

Brief description of drawings

Advantage of the present invention will be easily understand because these advantages by referring to following be described in detail in and consider by reference to the accompanying drawings time will become better understood, in the accompanying drawings:

Fig. 1 shows a heat screen with rotor blade;

Fig. 2 shows a heat screen with rotor blade and a spiral case partition wall stretcher; And

Fig. 3 shows a heat screen and a spiral case, and this spiral case has a divider and a partition wall stretcher.

The detailed description of mode of execution

Fig. 1 shows a heat screen with rotor blade (2) (1).

Fig. 2 shows heat screen (3) with rotor blade (4) and a spiral case partition wall stretcher (5).

Fig. 3 shows a heat screen (6), a spiral case (7), and this spiral case is with a partition wall (8) and a spiral case partition wall stretcher (9).

Exhaust from motor is directed to this turbine cylinder by this exhaust volute (7).This exhaust volute (7) allows exhaust to enter this turbine cylinder with direction radial for this turbine wheel.If use an axial turbine impeller, then gas must be diverted into axial direction before it arrives this turbine wheel.Axial direction will be redirect to towards the directed exhaust of a smooth cartridge housing dignity.Usually for the impact making bearing housing from the exhaust of heat on a wall heat screen (1) and (3) being arranged in this bearing housing.Axial direction will be redirect to towards heat screen (1) and (3) directed exhaust.But these blades (2) found out that in this heat screen (1) and (3) wall and (4) will make exhaust redirect to axial direction from radial direction effectively.These blades (2) and (4) guide along the wall of this heat screen (1) and (3) exhaust and optimize the reference angle on these turbine wheel blade inlet edges thus.Increase these rotor blades (2) and (4) can force gas reference angle to be reached the expectation of impeller blade angle by more optimizing, and do not rely on the vector naturally that leaves this housing volute gas and forced by this heat screen surface turn to vector.By this flowing being organized into better a flowing vector definitely, achieve the efficiency of raising.The quantity of blade can change.Find that four to eight blades are gratifying.

In multicylinder engine, from the cylinder alternately igniting of relative cylinder block.When " V " h type engine h, cylinder block is separated on the engine.When in line engine, cylinder block can be simply half cylinder above and the cylinder of half later.Exhaust is directed in turbine cylinder from multiple separate sections of this spiral case.Gas flow is separately for maintaining pressure pulsation, and this pressure pulsation occurs in exhaust when being released from cylinder.The maintenance of pulsation is made us wishing, because extra pressure pulsation can make this turbo machine, startup is faster.This contributes to reducing turbo lag.Be allowed to enter in the region of this turbine cylinder in exhaust, the separation between the divider between the two half-unit of this spiral case or partition wall (8) can contribute to maintaining from the exhaust of each cylinder block, and and then maintains these pressure pulsation.Use in rotation arranges the shortcoming of aial flow impeller and heat screen be impeller now and this turbine cylinder interval far off, and therefore away from this housing partition wall (8) and this pulsation divider.Extend (5) and (9) by increasing a partition wall to this heat screen, this pulsation can be maintained in the downstream of this impeller eye always and keep.

Although illustrate and describe the present invention with reference to these specific embodiments, it will be understood by those skilled in the art that and can make different changes and amendment not departing under the scope of the present invention as limited in following claims.

Claims

1., for having a kind of heat screen (1) of the turbosupercharger of an axial turbine wheel, this heat screen has multiple rotor blade (2), and exhaust air flow is redirect to axial direction by these blades.

2. heat screen according to claim 1 (1), has 4 to 8 rotor blades (2).

3. heat screen according to claim 1 (1), has 7 rotor blades (2).

4. heat screen according to claim 1 (1), comprises a spiral case partition wall stretcher (5) further.