Volute case for integral dynamic balance test of detachable turbocharger

Abstract

The invention relates to a volute for an overall dynamic balance test of a detachable turbocharger, and belongs to the technical field of machines. The volute is formed through casting and comprises a connector, a middle body and an air exhaust channel, wherein the connector and the air exhaust channel are installed on the two sides of the middle body through threads; by means of special model design, the size of the step-shaped inner wall of the connector and the curved-face shape and the size of the inner wall of the air exhaust channel can be adjusted and changed so that the size of the step-shaped inner wall of the connector can be matched with the size of a base of a turbine to be tested, and the curved-face shape and the size of the inner wall of the air exhaust channel can be matched with the shape and the size of blades of the turbine to be tested; under the condition that the middle body is not changed, the volute can be suitable for testing turbines with various sizes. The volute has the advantages of improving economical performance of the turbine dynamic balance test, enabling the dynamic balance test process of multiple sets of turbines to become simpler, improving efficiency of the turbine dynamic balance test and being suitable for the turbines of different models and convenient to maintain.

Description

technical field [0001] The invention relates to a volute used for a detachable overall dynamic balance test of a turbocharger, which belongs to the technical field of machinery. Background technique [0002] Since the turbocharger has many advantages and can improve the economy and power performance of the automobile engine, most diesel engines and some gasoline engines adopt exhaust gas turbocharging technology. [0003] The turbine of the turbocharger is a double fulcrum rotor with a very complex structure cantilevered on both sides. The working speed of the turbocharger rotor is usually between 60000r / min--160000r / min. The unbalanced rotor will cause the deflection and internal stress of the rotor shaft, which will cause the supercharger to generate large vibration and noise, accelerate the wear of bearings and sealing parts, reduce the efficiency of the supercharger, and cause the impeller and casing to collide in severe cases , resulting in damage to the rotor. Due t...

AI Technical Summary

Problems solved by technology

[0005] At present, on the domestic and foreign turbocharger dynamic balancing machine test benches, for each type of turbine, different types of volutes are used to match it for testing, which requires that each type of dynamic balancing test The turbocharger must manufacture the corresponding volute. At the same time, when the dynamic balance test is performed for each size of the turbine, the entire volute must be disassembled again. This method is neither economical nor efficient, so Making the volute in a size-adjustable mode has many advantages

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