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 using the elastic load mechanism. Background technique [0002] The three-redundancy servo valve stability test system includes elastic load mechanism, friction load mechanism and inertial load mechanism. It is used to test the stability and reliability of the servo valve under load conditions, especially the zero position stability of the valve; it provides the hydraulic test conditions for the long-term working of the three-redundancy servo valve, and through the long-term assessment of the servo valve, the product is guaranteed Reliability during working hours. [0003] According to the requirements of the servo system, it is necessary to realize the long-term work of the servo mechanism, and the product does not have a stable start-up time. Based on reliab...

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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