Suspension shaft centrifugal supercharger suitable for working condition of ultrahigh rotating speed

Abstract

The invention discloses a suspension shaft centrifugal supercharger suitable for a working condition of ultrahigh rotating speed. The suspension shaft centrifugal supercharger comprises a transmission unit and a fan pressurization unit; the transmission unit comprises a suspension main shaft (1) and a friction wheel set (2); the friction wheel set (2) comprises a first friction wheel set, a second friction wheel set and a third friction wheel set parallel in axial directions; the suspension main shaft (1) is a step shaft, and comprises a load section (103), an axial positioning section (102) and a friction transmission section (101); two end surfaces of the axial positioning section (102) are designed as inclined surfaces with a certain inclined angles, and the correspondingly contacted end surfaces of the second friction wheel set and the third friction wheel set are also designed as inclined surfaces with a certain inclined angles; and the fan pressurization unit comprises a centrifugal impeller set (8), a compressor intake port (9) and a compressor exhaust port (10). The centrifugal supercharger greatly reduces the friction loss of transmission parts, and greatly improves the stability of the friction wheel sets.

Description

technical field [0001] The invention belongs to the technical field of accessories related to internal combustion engines, and more specifically relates to a suspension shaft centrifugal supercharger suitable for extremely high speed working conditions. Background technique [0002] In order to improve the efficiency and output power of the internal combustion engine, before the air enters the cylinder, it is usually necessary to configure a supercharger to compress the air entering the cylinder so that more air can be inhaled under the same cylinder volume. Burn more fuel to achieve the effect of increasing power. At present, the commonly used engine superchargers mainly include mechanical supercharging and motor supercharging, and supercharging includes centrifugal supercharging, screw supercharging and Lutz supercharging, etc. Among them, more It is a centrifugal supercharger. It mainly uses the main shaft of the engine to drive the supercharger, compresses the air ente...

AI Technical Summary

Problems solved by technology

[0005] (1) On the one hand, due to the high-speed rotation of the pulsator, a large negative pressure is generated, and the negative pressure pushes the suspension center shaft to the end face of the axial limit of the friction wheel supporting wheel, resulting in serious wear on the step end face of the suspension main shaft of the centrifugal supercharger , and as the degree of wear increases, the centrifugal wheels are prone to collide with the compressed air casing;

[0006] (2) The three sets of friction wheel components are made of elastic materials, and there will be resonance phenomena caused by unbalanced rotation / support in the support and drive of the central shaft, and there are also problems such as inherent rotation accuracy defects of elastic wheels. All will lead to unstable and uneven rotation of the pulsator, which will affect the air intake and supercharging effect, resulting in large defects in the supercharger;

[0007] (3) The three sets of friction wheels are respectively driven by the corresponding pulleys, and the three pulleys are driven by the same belt to rotate. On the one hand, this structure causes three There is a speed difference in the rotation of the friction wheel, which causes the rotation of the suspension center shaft to be unstable, making the air pressure uneven and affecting the supercharging effect

[0008] (4) Under high-speed working conditions, the high-speed friction wheel drives the hot air to turn in the base to form a vortex, which is difficult to discharge to the outside of the machine base. The longer the centrifugal supercharger works, the more heat accumulates in the machine base, and the temperature continues to increase. If the temperature rises, especially in summer, the temperature inside the machine base is as high as 70-80°C, which can easily cause damage to the friction pair and affect the service life of the elastic friction wheel set.

Images