Dynamic loading device for two-way tension and pressure

Abstract

The invention discloses a dynamic loading device for two-way tension and pressure, belonging to the technical field of mechanical manufacturing. The dynamic loading device disclosed by the invention is structured as follows: a servo motor is fixed on a bottom plate and connected with a ball screw through a coupler, and a screw nut seat on the ball screw is connected with a connecting plate; a sliding support is connected with the connecting plate; four loading springs are sleeved on two guide rods passing through the sliding support; the two guide rods are connected with a connecting seat; a tension and pressure sensor is arranged between the connecting seat and a loading seat; and the loading seat is connected with a stressed part. The device disclosed by the invention has the advantages of reasonable structure, convenience for use, low friction force among parts, and smoothness for motion, the tension and pressure can be loaded statically, the dynamic loading device can move along with the stressed part, the dynamic load can be applied, and the loading force can be accurately controlled.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and in particular relates to a bidirectional tension-compression dynamic loading device. Background technique [0002] When testing the performance of mechanical equipment, it is often necessary to apply a certain load to it, and the performance of the loading device used will directly affect the accuracy and reliability of the test. With the continuous development of mechanical equipment in the direction of high precision, higher and higher requirements are put forward for the loading method, accuracy, response, reliability, etc., from fixed-point static loading to follow-up dynamic loading, from the loading force The qualitative requirements of the development of the development of the need for real-time precise control of the magnitude of the loading force, from one-way loading to two-way, compound loading. Among many loading devices, tension and compression loading devices a...

AI Technical Summary

Problems solved by technology

The loading of heavy objects can be done very accurately and does not require corresponding equipment, so it is easy to implement, but the loading point and the size of the loading force cannot be changed during the loading process. When the load is large, many heavy objects need to be configured, which is inconvenient to operate, and Only pressure load can be applied; mechanical loading mainly includes spiral and spring loading. These loading devices require simple equipment and can apply a wide range of loads. However, the existing screw loading devices have low sensitivity and cannot change the magnitude of the loading force in real time. Spring Due to the inconsistent tension and compression characteristics of the loading device, it is generally impossible to achieve accurate two-way loading of tension and compression; hydraulic loading devices mainly include hydraulic jacks, single-acting hydraulic loaders, two-way hydraulic loaders and electro-hydraulic servo loaders. Both directional acting hydraulic loaders can only apply unidirectional loads; unidirectional and bidirectional hydraulic loaders require additional hydraulic pumps, complex equipment pipelines, difficult maintenance, and high friction during piston operation, making it difficult to achieve accurate loading; Hydraulic servo loading controls the oil supply through the electro-hydraulic servo valve, and the loading force is relatively accurate, but it also requires a hydraulic pump, which has a complex structure and has certain limitations in loading formation; the equipment required for pneumatic loading is simpler than hydraulic loading, and its dynamic performance is slightly better. However, the applied pressure cannot be too large, and the loading force is unstable and the loading accuracy is low

[0004] None of the above-mentioned loading devices can fully realize the requirements of high-precision, fast-response, and reliable follow-up bidirectional tension-compression loading.

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