CN2697327Y

CN2697327Y - Small sized turbocharger

Info

Publication number: CN2697327Y
Application number: CN 200320124156
Authority: CN
Inventors: 王一棣; 邓茅桥; 吴玉堂; 邬喜来
Original assignee: Hunan Tianyan Machinery Co Ltd
Current assignee: Hunan Tianyan Machinery Co Ltd
Priority date: 2003-12-29
Filing date: 2003-12-29
Publication date: 2005-05-04
Anticipated expiration: 2013-12-29

Abstract

The utility model relates to a small sized turbocharger which is composed of a power-impeller turbine, an assembly of bearing body core, a centrifugal impeller compressor, an actuator assembly and a degassing valve component. The power-impeller turbine and the centrifugal impeller compressor are respectively fixed on the both ends of the assembly of bearing body core. The executor assembly is installed on a turbine box of the power impeller turbine, and is connected with the degassing valve component which is installed on the turbine box. In compressor impeller is fixed on the other end of a rotating shaft of a turbine rotor, and the compressor impeller and a cantilevering of the turbine rotor are installed on the both ends of the bearing body. The rotating shaft of the turbine rotor is floated in a bearing hole of the bearing body. The compressor impeller orderly pressed an antithrust bearing, a sealing sleeve, a sealing oil cover into the end of the compressor of the bearing body form the inside to the outside. The utility model is characterized in that the compressor impeller adopts a forerake backward impeller with low wheel nave bus and high overlapping degree of long and short blades, and the turbine rotor adopts non-uniform beam blades with low inertia and big cambered surface. The utility model raises the dynamic balance accuracy of the rotor assembly, and makes the rotor assembly can stably and reliably operate.

Description

The small sized turbine pressurized machine

Technical field

The utility model relates to technical field of engines, specifically a kind of turbosupercharger, the small sized turbine pressurized machine of multi-purpose motor such as especially a kind of automobile that is applicable to four cylinders and the middle-size and small-size power of three cylinders, engineering machinery, special vehicle, peculiar to vessel and generating.

Background technique

Supercharging technology is one of major measure that improves engine power performance, and most widely used be to adopt turbocharging technology.Turbosupercharger is the critical component of supercharged engine pressurization system, it is the high-temp waste gas energy drives turbine wheel high speed rotating that utilizes motor to discharge, thereby the compressor impeller that drives on same axle runs up with same rotating speed, the compressor impeller of high speed rotating sucks fresh air and will send into cylinder after the air compression, thereby make air density and aeration quantity in the cylinder improve exponentially, so just can provide more oil inflame, thereby improve the power of motor, improved the combustion condition of fuel oil simultaneously, fuel oil is fully burnt, thereby reduced fuel consume, reduced the ratio of the waste gas Toxic that enters in the atmosphere, and then finally realize environmental protection and energy saving, improve the effect of engine power.So supercharging technology is to adapt to environmental regulation and improve one of important technique measure of modern power car and engineering machinery, also is known as " green revolution ".

Along with domestic consciousness to environmental protection and energy saving is strengthened day by day, each motor producer has all strengthened the exploitation dynamics to supercharged engine.And it is also more and more higher to the performance parameter index request of supercharged engine.Present domestic six cylinder engine has generally adopted turbosupercharger, but the four cylinder engine of medium and small cylinder diameter does not also almost adopt turbosupercharger, its main cause is that the turbosupercharger size requirement is little, structural reliability requires high, matching performance requires, and will satisfy Europe II emission standard requirement simultaneously.

Summary of the invention

Goal of the invention of the present utility model provides a kind of high-performance, high reliability, small practical turbosupercharger, with four cylinders that satisfy medium and small cylinder diameter and the needs of the middle-size and small-size power engine supercharging of three cylinders.

In order to realize the foregoing invention purpose, the technological scheme that the utility model adopted is: the small sized turbine pressurized machine, form by power turbine turbo machine, bearing support core assembly, receded disk impeller gas compressor, final controlling element assembly and bleed valve door assembly five major parts; Power turbine turbo machine and receded disk impeller gas compressor are individually fixed in the two ends of the bearing support of bearing support core assembly; The final controlling element assembly is installed on the turbine box of power turbine turbo machine by actuator bracket, its be installed on turbine box on the air outlet flange in vent hole on the bleed valve door assembly be connected, compressor impeller in the receded disk impeller gas compressor is fixed in the rotating shaft the other end of the turbine rotor in the power turbine turbo machine, and is installed in the two ends of bearing support with turbine rotor cantilever in the power turbine turbo machine; The rotating shaft of turbine rotor floats in the bearing hole of bearing support by bearing housing; Compressor impeller in the receded disk impeller gas compressor is pressed into thrust bearing, stuffing box gland, oil sealing cap in the bearing support gas compressor end from inside to outside successively; It is characterized in that the back ward impeller that leans forward that described compressor impeller adopts low wheel hub bus, increases the blade profile area, the deviated splitter vane degree of overlapping is high, turbine rotor adopts low inertia, big cambered surface non-uniform beam blade.

The utility model adopts further technological scheme to be: described thrust bearing has three sphenoid surface oil films.

The utility model adopts further again, and technological scheme is: described stuffing box gland is that mazy type is around structure.

The utility model adopts further, and technological scheme is: described oil sealing cap is that mazy type is around structure.

Owing to adopted above-mentioned art designs scheme, the utility model has reduced the rotary inertia of turbine rotor and compressor impeller, has improved the dynamic balance accuracy of rotor assembly, makes pressurized machine to move reliably 140000 rev/mins stabilization of speed; Widened the operating range of air mass flow, pressure ratio and gas compressor high efficient area, made pressurized machine to obtain better performance requirement with Engine Matching; Adopted stuffing box gland and the oil sealing cap of mazy type at the end of calming the anger simultaneously, solved the difficult problem of easy leakage of oil when gas compressor produces negative pressure around structure.Test result shows, after the utility model and the YC4108ZQ of Guangxi Yuchai Machinery Co., Ltd. and YC4108ZLQ and the YC4110ZLQ four cylinder engine coupling, engine power performance and economic performance are significantly improved, Europe II emission standard requirement has been satisfied in discharging, and has passed through 1000 hours durable certification tests of reliability smoothly.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the left view of Fig. 1.

Embodiment

Further describe the utility model below in conjunction with accompanying drawing.

Small sized turbine pressurized machine as depicted in figs. 1 and 2 is made up of power turbine turbo machine, bearing support core assembly, receded disk impeller gas compressor, final controlling element assembly 28 and bleed valve door assembly 31 5 major parts; Wherein the power turbine turbo machine comprises turbine box 1 and turbine rotor 2; The receded disk impeller gas compressor comprises compressor impeller 20 and gas compressor volute 18; Bearing support core assembly comprises bearing support 8 and bearing housing 9 and back-up ring 7.

The back ward impeller that leans forward that compressor impeller 20 adopts low wheel hub bus, increases the blade profile area, the deviated splitter vane degree of overlapping is high, turbine rotor 2 adopts low inertia, big cambered surface non-uniform beam blade.

Turbine box 1 is fixing with being connected by hot junction pressing plate 5 and heat-resisting screw 6 of bearing support 8, and the shaft centerline of turbine box 1 turbine rotor 2 in bearing support 8 can install and fix in 360 ° of any rotations, on motor, to install easily, turbine box 1 is designed to the single channel structure 4 of the long pear-shaped section of 360 ° of full admissions, its air inlet and air outlet flange pattern design by motor excuse requirement, be provided with vent hole in its air outlet flange, and bleed valves assembly 31 be installed at this.Bleed valves assembly 31 is connected with final controlling element assembly 28.

Gas compressor volute 18 is fixing with being connected by cold junction pressing plate 21 and bolt 22 of bearing support 8, and the shaft centerline of gas compressor volute 18 turbine rotor 2 in bearing support 8 can install and fix in 360 ° of any rotations, on motor, to install easily, and be provided with pressure-taking hole near the air outlet of gas compressor volute 18, and valve 16 has been installed at this, gas compressor volute 18 gas collection roads are snail like, and its through-flow flow channel shape is for becoming the circular section.

Final controlling element assembly 28 is fixed on the turbine box 1 by actuator bracket 27 and bolt 26, its gas compressor volute 18 by receded disk impeller gas compressor output terminal is gathered air pressure and is controlled, thereby regulates the unlatching and size of the venting valve in the bleed valves assembly 31 that is installed on the turbine box 1.

Turbine rotor 2 and compressor impeller 20 cantilevers are installed in the two ends of bearing support 8; The rotating shaft of turbine rotor 2 by two radially the bearing housing 9 that floats of oil-feed float in the bearing hole of bearing support 8.

Locking nut 19 is fixed tightly in compressor impeller 20, thrust bearing 10, stuffing box gland 11, oil sealing cap 12 on the other end of rotating shaft of turbine rotor 2 has formed rotor assembly, and thrust bearing 10, stuffing box gland 11, oil sealing cap 12 are pressed in the bearing support 8 gas compressor ends from inside to outside successively; Compressor impeller 20 and turbine rotor 2 have passed through accurate single-piece dynamic balancing, and rotor assembly is through accurate combination dynamic balancing, thereby the assurance pressurized machine can reliablely and stablely operation under 140000 rev/mins high speed.

Bear the thrust bearing 10 that a tying thrust has adopted three sphenoid surface oil films;

Single seal ring

3 and 23 structures are adopted in the oily gentle sealing of the turbine end of rotor assembly and gas compressor end respectively, simultaneously adopted stuffing box gland 11 and the oil sealing cap 12 of mazy type, solved the difficult problem of easy leakage of oil when gas compressor produces negative pressure around structure at the gas compressor end.

There is an oil inlet hole 24 bearing support 8 upper ends, lubricant oil is divided into two-way after radially entering bearing support 8, the bearing housing 9 of one tunnel lubrication pressure mechanism of qi end and turbine rotor 2 axle journals and have the thrust bearing 10 of three sphenoid surface oil films, the bearing housing 9 and turbine rotor 2 axle journals of the lubricated turbine end in another road, lubricant oil flows to engine crankcase by the spill port of bearing support 8 lower ends at last.

Claims

1, small sized turbine pressurized machine is made up of power turbine turbo machine, bearing support core assembly, receded disk impeller gas compressor, final controlling element assembly (28) and bleed valve door assembly (31) five major parts; Power turbine turbo machine and receded disk impeller gas compressor are individually fixed in the two ends of the bearing support (8) of bearing support core assembly; Final controlling element assembly (28) is installed on the turbine box (1) of power turbine turbo machine by actuator bracket (27), its be installed on turbine box (1) on the air outlet flange in vent hole on bleed valve door assembly (31) be connected, compressor impeller in the receded disk impeller gas compressor (20) is fixed in the rotating shaft the other end of the turbine rotor (2) in the power turbine turbo machine, and is installed in the two ends of bearing support (8) with turbine rotor (2) cantilever in the power turbine turbo machine; The rotating shaft of turbine rotor (2) floats in the bearing hole of bearing support (8) by bearing housing (9); Compressor impeller in the receded disk impeller gas compressor (20) is pressed into thrust bearing (10), stuffing box gland (11), oil sealing cap (12) in bearing support (8) the gas compressor end from inside to outside successively; It is characterized in that the low wheel hub bus of described compressor impeller (20) employing, the back ward impeller that leans forward that the deviated splitter vane degree of overlapping is high, turbine rotor (2) adopts low inertia, big cambered surface non-uniform beam blade.

2, small sized turbine pressurized machine according to claim 1 is characterized in that described thrust bearing (10) has three sphenoid surface oil films.

3, small sized turbine pressurized machine according to claim 2 is characterized in that described sealing cover (11) is that mazy type is around structure.

4, small sized turbine pressurized machine according to claim 3 is characterized in that described oil sealing cap (12) is that mazy type is around structure.