A Variable Nozzle Turbocharger Adjustment Mechanism Integrated on Turbine Housing

Abstract

The invention relates to a variable nozzle turbocharger regulating mechanism integrated on a turbine shell, belonging to the technical field of variable nozzle turbochargers used for vehicles. The variable nozzle turbocharger regulating mechanism comprises nozzle ring fixed blades, nozzle ring adjustable blades, a mounting disc, driven gears, a driven gear ring, a driving gear, a double-rocker driving mechanism, a split-type turbine shell and a turbine shell cover board. The driven gears and the nozzle ring adjustable blades are respectively installed on the circumferences of the front and the back side faces of the mounting disc through mounting shafts of the driven gears and the nozzle ring adjustable blades. The driven gears are connected at the inner edge of the driven gear ring which is used for controlling the nozzle ring adjustable blades to revolve synchronously, and through the driven gear ring, the nozzle ring adjustable blades on the circumference can revolve synchronously. For the purpose of adapting to air motion law, the initial installation angles of the nozzle ring adjustable blades are arranged to be unequal along the circumferential direction. The width of the nozzle ring is controlled by the nozzle ring fixed blades, and the nozzle ring adjustable blades are driven by the double-rocker driving mechanism, so the accuracy and the uniformity of the adjustment of opening sizes of the nozzle ring adjustable blades are ensured.

Description

technical field [0001] The invention relates to the technical field of variable-nozzle turbochargers for vehicles, in particular to a variable-nozzle turbocharger adjustment mechanism integrated on a turbine housing. Background technique [0002] From the invention of the internal combustion engine to today, more than 100 years later, related technologies are constantly innovating and becoming mature. However, internal combustion engines still face many problems as vehicle power: low thermal efficiency (especially gasoline engines); the dependence on petroleum resources is gradually decreasing; exhaust emissions pollute the atmospheric environment, and it is difficult to centralize them. Engine supercharging mainly increases the intake air density through the compressor. This technology has been widely used as an important measure to increase engine power per liter, improve economy and emission characteristics. According to the different ways of driving the compressor, engi...

AI Technical Summary

Problems solved by technology

However, internal combustion engines still face many problems as vehicle power: low thermal efficiency (especially gasoline engines); the oil resources they rely on are gradually decreasing; exhaust emissions pollute the atmospheric environment and are difficult to centralize, etc.

[0008] 1) The traditional variable nozzle turbocharger nozzle ring adjustable vane drive device is installed in the intermediate part, if you want to transform the fixed nozzle turbocharger into a variable nozzle turbocharger, you need to modify the intermediate The structure of the turbine part is changed at the same time, the production process is complex, the exchange rate and versatility of the parts are low, the production cost is increased, and it is difficult to realize industrial production

[0009] 2) The opening of the adjustable blades of each nozzle ring of the traditional variable nozzle turbocharger is completely consistent in design, which is inconsistent with the change law of the inlet airflow angle of the actual working of the vehicle engine, which increases the energy loss

[0010] 3) In some variable nozzle turbochargers, although the opening of the nozzle ring’s adjustable vane can be adjusted accordingly with the change of engine speed, its performance is extremely unstable and its reliability is poor during use , during use, the adjustable blades of the nozzle ring may not move completely according to the preset rules, or even get stuck

Therefore, the application range of the variable nozzle turbocharger is limited, and it is difficult to widely promote the use of it in vehicle engines.

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