Bearing device of long-stroke vibration test stand

Abstract

The invention discloses a bearing device of a long-stroke vibration test stand. The device comprises a vibration table and a bearing platform, and is characterized in that the bearing platform is directly connected with a moving coil of the vibration table through a bearing spring assembly, the bearing spring assembly comprises a plurality of air springs which are overlapped together, air bags of the plurality of air springs are communicated, the air bags of the air springs are communicated with a central air chamber, and the air volume of the central air chamber is larger than the total air volume of the air bags of the air springs. The air volume of the central air chamber is far larger than the total air volume of the plurality of air spring air bags, so that when the test bed moves in a large displacement manner, the volume change delta V1 of the air spring air bags is far smaller than the air volume V2 of the central air chamber, the pressure change of the whole communicated air chamber is very small, the rigidity of the bearing spring assembly can be effectively reduced, and the additional load of the test bed is further reduced.

Description

technical field [0001] The invention relates to an electric vibrating table used in the field of mechanical environment test equipment, in particular to a bearing structure for a long-stroke electric vibrating table. Background technique [0002] As a kind of mechanical environment test equipment, the electric vibration table is mainly used to verify the quality of the product in the mechanical environment. With the continuous improvement of people's requirements for product quality, the electric vibration table has been widely used in national defense , aviation, aerospace, communications, electronics, automobiles, home appliances and other fields. At present, the maximum stroke of the conventional vibration test bench is 50mm, and the maximum speed is 2m / s. However, for some special occasions, such as verifying the functional and structural integrity of the carrier-based aircraft or equipment in the aircraft when it is subjected to the impact of ejection take-off and arre...

AI Technical Summary

Problems solved by technology

Although this kind of bearing device can solve the problem of bearing capacity and large displacement, its structure is relatively complicated, and the connection between the piston rod and the table surface of the vibration table will also affect its rigidity. Therefore, it is necessary to further improve the structure of the existing electric vibration table. improvement of

Images