Elastic load mechanism and method for measuring elastic load

Abstract

The invention discloses an elastic load mechanism placed at a test stand. The elastic load mechanism comprises a spindle, a first bracket, a second bracket, a nut, a spring, a first spring sleeve and a second spring sleeve. The first bracket and the second bracket are symmetrically provided with through holes. The first spring sleeve and the second spring sleeve include first ends and second ends; the outer diameters of the first ends are larger than the diameters of the through holes and the outer diameters of the second ends are smaller than the diameters of the through holes; and the second ends are sleeved into the through holes. The first ends of the first spring sleeve and the second spring sleeve are opposed to each other between the first and second brackets. A shaft shoulder is arranged at one end of the spindle and the nut is arranged at the other end; the first spring sleeve, the spring, and the second spring sleeve sleeve between the shaft shoulder and the nut successively. The spindle drives the spring sleeves to move relative to the brackets. The elastic load mechanism having a simple structure can be installed conveniently. During movement, the pulling force and pressure on the spring by the spindle are transformed into the pressures applied on the spring, so that the test stand structure becomes reliable and stable.

Description

Technical field [0001] The invention relates to the field of servo mechanisms, in particular to an elastic load mechanism in a three-redundancy servo valve stability test system and a method for measuring elastic load by using the elastic load mechanism. Background technique [0002] The stability test system of three-redundancy servo valve includes elastic load mechanism, friction load mechanism, and inertial load mechanism. Used to test the stability and reliability of the servo valve under load conditions, especially the zero-position stability of the valve; provide hydraulic test conditions for the long-term operation of the three-redundancy servo valve, and ensure the product by performing long-term evaluation on the servo valve Reliability during working hours. [0003] According to the requirements of the servo system, the servo mechanism needs to work for a long time, and the product does not have a stable time to start. Based on the consideration of reliability, the exist...

AI Technical Summary

Problems solved by technology

However, in the existing three-redundancy nozzle baffle servo valve test bench, the spring and the main shaft are mostly fixed by welding. It is difficult to realize the welding of the spring and the main shaft in a small space, and the technical requirements for welding are relatively high.

Under repeated high-strength experimental conditions, it is difficult to maintain a firm welded connection between the spring and the main shaft, which makes the overall structure of the test bench less stable

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