High-precision smooth-running automobile chassis dynamometer flywheel set system

Abstract

The invention relates to a high-accuracy stably-operated automobile chassis power measuring machine flywheel set system, and belongs to automobile performance detecting equipment. The system mainly comprises a main shaft assembly (A), a flywheel assembly (B), a brake assembly (C), a main shaft stabilizer assembly (D) and a frame (E), wherein the main shaft assembly (A) is arranged on the frame (E) through bearing seats (3) at both ends and the main shaft auxiliary stabilizer assembly (D) in the middle; the flywheel assembly (B) consists of a plurality of sets of clutches and flywheels with different rotating inertias, and is sleeved on the main shaft assembly (A) through a bearing and a bearing bush; and the flywheels are arrayed on the main shaft in a mode that the massive flywheels are distributed on both sides of the bearing seats, the separation and the combination of the flywheels with greater mass are controlled by double clutches, and the brake assembly (C) is fixed on the frame (E). The system aims to solve the problems of stable operation during high speed testing, high simulation quality accuracy, small axial size during simulating the same rotating inertia, and the like.

Description

Technical field [0001] The invention relates to a precise subdivision type chassis dynamometer flywheel system capable of smooth operation. It belongs to automobile performance testing equipment. Background technique [0002] Chassis dynamometer is a kind of automobile testing equipment widely used at home and abroad. The flywheel system is an important part of the automobile chassis dynamometer. During the test, its moment of inertia is used to simulate the acceleration resistance of the automobile to realize the test of the acceleration ability of the automobile; the kinetic energy of the automobile is stored to test the sliding distance and judge based on this The resistance of the automobile drive train and driving system; simulate the inertial mass of the automobile when driving on the road, and realize the emission detection of the automobile under multiple working conditions. [0003] At present, the main problems of the flywheel system used by chassis dynamometer manufact...

AI Technical Summary

Problems solved by technology

The problem with the above connection method is that because the assembly gap between the inner ring of the flywheel and the main shaft cannot be eliminated, when a high-speed test is performed, for example, a car drives the flywheel to rotate at 120km / h, due to the effect of the gap, the flywheel with a large mass will The occurrence of axial shimmy and radial vibration, on the one hand, shortens the service life of the spindle, and on the other hand, brings certain safety hazards

[0005] 2. The layout of the flywheels. There is no standard regulation for the layout of the existing flywheels. For example, patent 200420075561. This type of arrangement cannot guarantee the minimum bending moment on the main shaft, so that the diameter of the main shaft is the smallest to meet the limited size of the matching clutch inner hole and the purpose of saving materials

[0006] 3. The number of clutches. The existing methods of controlling the flywheel clutch use a single clutch. When the mass of the flywheel is large, the moment of inertia is large, and the standard general-purpose single clutch cannot normally transmit the torque to achieve effective control.

[0007] 4. The support method of the flywheel group: the existing flywheel group adopts two-point support at both ends of the bearing seat. When the number of flywheels in the flywheel group is greater than 5, the span between the two bearing seats increases. When the flywheel rotates at a high speed, the The main shaft has a certain bending deformation, which causes the main shaft to vibrate and affects the normal operation of the flywheel

[0008] 5. Flywheel design: The flywheels of the original automobile test bench are all homogeneous short cylinders. When there are many grades and the moment of inertia is large, the structure of the flywheel group will cause the axial length of the flywheel group to be too long, which will easily cause the spindle Vibration, unstable work, and difficult equipment processing and installation

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