Hydraulic loading device with multiple loading force output modes

Abstract

The invention provides a hydraulic uploading device with diversified unloading force output modes. The hydraulic uploading device comprises two or more uploading oil cylinders with different strokes and different effective areas. The two or more uploading oil cylinders are sequentially and coaxially connected and share a counter-force support. The uploading oil cylinder located at one end serves as a static-state uploading oil cylinder and a single piston rod hydraulic cylinder, and a cylinder body of the single piston rod hydraulic cylinder is connected with the counter-force support. The uploading oil cylinder located at the other end serves as a dynamic uploading oil cylinder and a double piston rod hydraulic cylinder, and a piston rod oil outlet cylinder of the double piston rod hydraulic cylinder is connected with a to-be-uploaded test piece. The uploading oil cylinders located in the middle are double piston rod hydraulic cylinders. Each uploading oil cylinder is provided with alocking device for locking a piston rod of the uploading oil cylinder to enable the piston rod not to axially move relative to the corresponding cylinder body. When one of the uploading oil cylindersis needed for using, the uploading oil cylinder is unlocked, and the other uploading oil cylinders are locked. According to the hydraulic uploading device, through easy switching, the testing requirement of the large-load static-state strength can be met, and the high-accuracy dynamic vibration fatigue test requirement can also be met.

Description

technical field [0001] The invention relates to the technical field of material science research and application of real test, in particular to a hydraulic loading device with multiple loading force output modes. Background technique [0002] In the application field of material science research under the existing technical conditions, the dynamic vibration fatigue test and static strength test of general real (product) materials are usually completed by two special test equipment. The reason is: the static strength test, the load is large, the amplitude is large, and the loading speed is not high; the dynamic vibration fatigue loading test is small, the amplitude is small, and the excitation loading speed is high (high frequency). If the two tests are placed on a special equipment and a large-scale loading cylinder is used to complete the hydraulic oil supply system, the flow rate of the hydraulic oil supply system must be configured according to the large-load and large-sc...

AI Technical Summary

Problems solved by technology

In addition, the large-load oil cylinder also serves both dynamic and static functions, and its tension-compression sensor can only be selected according to the maximum value. Due to its large measuring range, its feedback accuracy is correspondingly reduced during the small-load vibration fatigue test.

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