A test method for stiffness characteristics of an air spring

Abstract

The invention discloses a stiffness characteristic testing method of an air spring. The stiffness characteristic testing method of the air spring includes the following steps of fixing a first end of the air spring on a platform of a microprocessor control electro-hydraulic servo fatigue testing machine; adjusting interior air pressure of the air spring and enabling the interior air pressure to reach a first set air pressure value; by means of a chuck of the testing machine, stretching a second end of the air spring until the second end of the air spring reaches a designated position and fixing the second end of the air spring; adjusting the interior air pressure of the air spring and enabling the interior air pressure to reach a second set air pressure value; by means of the chuck of the testing machine, stretching the second end of the air spring for a set length and enabling the second end of the air spring to stay for a time; downward compressing the air spring at a set speed, reading internal pressure value, loading value and the maximum outer diameter of the air spring and recording the internal pressure value, loading value and the maximum outer diameter of the air spring when the air spring deforms for a set distance, and recording the maximum outer diameter of the air spring when the air spring is compressed for the maximum distance; and organizing data and analyzing a result. The stiffness characteristic testing method of the air spring can effectively solve the problem that an existing stiffness characteristic testing method of the air spring is high in test cost.

Description

technical field [0001] The invention relates to the technical field of vehicle manufacturing, in particular to a stiffness characteristic test method of an air spring. Background technique [0002] Air spring refers to a spring that is filled with compressed air in a retractable airtight container and utilizes the elastic action of air. Compared with metal springs, it has the advantages of small mass, good comfort, fatigue resistance, and long service life. It also has the advantages of good vibration damping effect, adjustable stiffness, and strong bearing capacity. Therefore, the air spring is one of the key components of vehicle vibration control. Among the various parameters of the air spring, the stiffness is an important parameter to characterize the performance of the air spring, which directly reflects the ability of the air spring to withstand the force under static conditions. The main factors affecting the static stiffness of the air spring are displacement, loa...

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Problems solved by technology

[0005] In view of this, the main purpose of the present invention is to provide a kind of stiffness characteristic test method of air spring, the stiffness characteristic test method of this air spring effectively solves the higher problem of the stiffness characteristic test method test cost of air spring

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