CN2651450Y

CN2651450Y - Turbine booster

Info

Publication number: CN2651450Y
Application number: CN 03248390
Authority: CN
Inventors: 王一棣; 陈曰义; 邓茅桥; 王剑; 胡辽平; 邬喜来
Original assignee: Hunan Tianyan Machinery Co Ltd
Current assignee: Hunan Tianyan Machinery Co Ltd
Priority date: 2003-07-26
Filing date: 2003-07-26
Publication date: 2004-10-27
Anticipated expiration: 2013-07-26

Abstract

The utility model discloses a turbine booster which is composed of a power impeller turbine, a bearing body assembly, a centrifugal air compressor for an impeller and an executor assembly. The turbine booster is characterized in that an impeller of the centrifugal air compressor uses a backward bending procline impeller with a low wheel hub bus bar, a large phylliform cambered surface, and a long lamina and a short lamina which are overlapped; an impeller of the turbine uses a lamina with a large phylliform cambered surface and a variable section beam. Due to adoption of the design proposal, the utility model decreases the rotary inertia and air admittance blocking flow coefficient of the impeller of the centrifugal compressor, enlarges flowrate, pressure ratio and the working range of a high-efficiency region, improves the aerodynamic characteristic of the impeller of the centrifugal compressor, and increases the work efficiency by 7 %. The turbine booster optimizes the ability of sucking work and making work and increases the total efficiency of the booster by 4 % on the basis of enhancing the reliability of the turbine. After the turbine booster is matched with an engine, the dynamic performance and the economy of the engine are improved obviously, and the discharge satisfies the discharge standard of 1 ohm.

Description

Turbosupercharger

Technical field

The utility model belongs to technical field of engines, particularly mainly is applicable to the turbosupercharger of the engine booster on the automobile that requires the low speed large torque, engineering machinery, the special vehicle.

Background technique

The turbocharging technology of internal-combustion engine, be that the high-temp waste gas with certain pressure that cylinder exhaust pipe is discharged is flowed into turbosupercharger expansion working in turbine, drive the centrifugal compressor impeller high speed rotating coaxial with turbine, make the air compression work done of cylinder of internal-combustion engine, it can make engine performance be significantly improved, therefore turbosupercharging not only be used for marine engine, locomotive with internal-combustion engine, transportation formula vehicle with internal-combustion engine, stationary power generation unit with internal-combustion engine, also be used for the various internal-combustion engines in each field of national economy.But turbocharging technology is used to transport the formula field of internal combustion engine than later, up to early sixties since radial-flow type small sized turbine pressurized machine succeed in developing and commercialization just developed rapidly, its main cause is that the characteristics of vehicle internal combustion engine require the turbosupercharger size little, reliable in structure, good aeroperformance, can satisfy road and load variations condition extremely complicated in the vehicle driving, and low price etc.Through ground development decades, radial-flow type small sized turbine pressurized machine has been widely used on the various haulage vehicles in each.But be used for now that turbosupercharger on the various haulage vehicles exists rotary inertia and air inlet choked flow flow coefficient is higher, the operating range of flow, pressure ratio and high efficient area is narrow, and the aerodynamic characteristics of compressor impeller is bad, the shortcoming that working efficiency is not high.

Summary of the invention

Goal of the invention of the present utility model provides a kind of efficient, reliable, practical turbosupercharger, it has overcome the defective that existing turbosupercharger exists, make the supercharged diesel function obtain higher boost pressure, keep supercharged diesel engine that good low speed torque performance is arranged, to improve its power character and Economy.

In order to realize the foregoing invention purpose, the technological scheme that the utility model adopted is: turbosupercharger, and it is made up of power turbine turbine, bearing support assembly, impeller centrifugal-flow compressor, final controlling element assembly four big major components; Power turbine turbine and impeller centrifugal-flow compressor are individually fixed in the two ends of bearing support assembly, the final controlling element assembly is installed in by actuator bracket on the compressor volute of impeller centrifugal-flow compressor, and it is controlled by the bleed valve door assembly that is installed on the impeller centrifugal-flow compressor output terminal; Turbine wheel and centrifugal compressor impeller cantilever are placed in the rotating shaft two ends, rotating shaft places in the intermediate hole of bearing support assembly by bearing housing, the palintrope that what it is characterized in that described centrifugal compressor impeller adopts is low wheel hub bus, leaf cambered surface is big, deviated splitter vane the is overlapping impeller that leans forward; What described turbine wheel adopted is the blade of big cambered surface, non-uniform beam.

Owing to adopted design proposal as above, the utility model to reduce the rotary inertia and the air inlet choked flow flow coefficient of centrifugal compressor impeller, widened flow, the operating range of pressure ratio and high efficient area; Improve the aerodynamic characteristics of centrifugal compressor impeller, increased work efficiency 7%.The utility model has been optimized the ability of inhaling merit and acting on the basis that promotes the turbine reliability, make the pressurized machine total efficiency improve 4%.After the utility model and the Engine Matching, the power character of motor, Economy is significantly improved, and Europe I emission standard is satisfied in discharging.

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.

Turbosupercharger as depicted in figs. 1 and 2, it is made up of power turbine turbine, bearing support assembly, impeller centrifugal-flow compressor, final controlling element assembly 25 4 big major components; Wherein the power turbine turbine comprises turbine box 4 and turbine wheel 2, and the impeller centrifugal-flow compressor comprises centrifugal compressor impeller 28 and gas compressor volute 13, and the bearing support assembly comprises bearing support 11 and places rotating shaft 21 in the intermediate hole 15 of bearing support 11 by bearing housing 8.

The left side of turbine box 4 is connected with heat-resisting screw 10 by hot junction pressing plate 9 with the right side of bearing support 11, adopts bolt 1 to be connected between its right side and the end cap 3.Turbine box 4 adopts the outlet sidewall to be skewed 360 ° of full admission pear shaped cross sectional configuration of double flow channel.

Turbine wheel 2 and centrifugal compressor impeller 28 cantilevers are placed in rotating shaft 21 two ends, the palintrope that centrifugal compressor impeller 28 adopts is low wheel hub bus, leaf cambered surface is big, deviated splitter vane the is overlapping impeller that leans forward; What worm gear impeller 2 adopted is the blade of big cambered surface, non-uniform beam.The rotor set of turbosupercharger by centrifugal compressor impeller 28, stuffing box gland 31, thrust bearing 16 and thrust plate 17 by linking into an integrated entity through the turbine shaft 22 and the locking nut 27 of friction welding be combined into by rotating shaft 21 and turbine wheel 2.

The inner spline screw 14 that passes on left at bearing support 11 is equipped with a back of the body dish 12, and stuffing box gland 31 is positioned at the center of back of the body dish 12, and thrust bearing 16, thrust plate 17, oil baffle 18 are between back of the body dish 12 and bearing support 11.Between the inner ring of thrust bearing 16 and rotating shaft 21, be provided with spacer 19, in case leak-stopping oil and gas blowby.Oil baffle 18 is positioned at the outside of thrust bearing 16, to block the lubricant oil that throws away and to make it flow to spill port 24.

There is an oil inlet hole 23 bearing support 11 upper ends, and lubricant oil is divided into two-way after radially entering bearing support 11; The bearing housing 8 and the thrust bearing 16 of one road lubricated impeller centrifugal-flow compressor end, the bearing housing 8 of the lubricated power turbine turbine end in another road.

The right side of gas compressor volute 13 is connected with back of the body dish 12 by pressing plate 30 and bolt 29, and its gas collection road is snail like, and its through-flow flow channel shape is for becoming the circular section.

Locking nut 27 is fixed on centrifugal compressor impeller 28 on the turbine shaft 22, also stuffing box gland 31 and thrust plate 17 is compressed simultaneously.

Final controlling element assembly 25 is installed in by actuator bracket 20 on the compressor volute 13 of impeller centrifugal-flow compressor, and it is controlled by the bleed valve door assembly 26 that is installed on the impeller centrifugal-flow compressor output terminal.

Claims

1, turbosupercharger, it is made up of power turbine turbine, bearing support assembly, impeller centrifugal-flow compressor, final controlling element assembly (25) four big major components; Power turbine turbine and impeller centrifugal-flow compressor are individually fixed in the two ends of bearing support assembly, final controlling element assembly (25) is installed in by actuator bracket (20) on the compressor volute (13) of impeller centrifugal-flow compressor, and it is controlled by the bleed valve door assembly (26) that is installed on the impeller centrifugal-flow compressor output terminal; Turbine wheel (2) and centrifugal compressor impeller (28) cantilever are placed in rotating shaft (21) two ends, rotating shaft (21) places in the intermediate hole (15) of bearing support assembly by bearing housing (8), the palintrope that what it is characterized in that described centrifugal compressor impeller (28) adopts is low wheel hub bus, leaf cambered surface is big, deviated splitter vane the is overlapping impeller that leans forward; What described turbine wheel (2) adopted is the blade of big cambered surface, non-uniform beam.