Load spectrum testing method for excavator working device

A technology of working device and testing method, which is applied in the field of construction machinery, can solve problems such as lack of universal significance and failure to consider the influence of side load and partial load, etc.

Active Publication Date: 2016-12-07
CHANGAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

The load spectrum measured by this method is only the load spectrum under a specific digging attitude, whi...

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  • Load spectrum testing method for excavator working device
  • Load spectrum testing method for excavator working device
  • Load spectrum testing method for excavator working device

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[0031] Comply with the above technical solutions, such as Figure 1 to Figure 3 As shown, in order to make the technical solution of the present invention clearer, the solution will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 1As shown, the working device of the excavator includes three parts: the boom 3, the stick 4 and the bucket 6. One end of the boom 3 is hinged with the base 1 at point O, and the other end is hinged with the stick 4 at point D; Bucket 6 is hinged at point K. The boom hydraulic cylinder 2 is arranged on the lower side of the boom 3, and its two ends are respectively connected with the base 1 and the boom 3 through hinge points A and B, and the boom hydraulic cylinder 2 drives the boom 3 to perform a lifting motion around point O. The stick hydraulic cylinder 9 is arranged on the upper side of the boom 3, and its two ends are respectively connected with the boom 3 and the stick 4 throug...

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Abstract

The invention discloses a load spectrum testing method for an excavator working device. The method comprises the steps that firstly, displacement sensors and pressure sensors are arranged at all hydraulic cylinders of the excavator working device to obtain hydraulic cylinder telescopic amount data and hydraulic cylinder force data; then, cutting off is carried out on a bucket rod with a virtual plane, a disengagement body is obtained, the position of the gravity center of the disengagement body is calculated, a strain rosette is arranged on the part of the cut section on the bucket rod, the internal force component of the section is derived, the load time course of the tip of an excavator bucket is obtained through the section internal force according to the balance relation of force in combination with the structural size of the working device, and the load spectrum of the working device can be compiled with the load time course. The load spectrum obtained with the method includes the influence of the borne positive load in the excavating process, also includes the influences of eccentric loads and side loads, and coincides with the practical conditions better; the method is suitable for tests of load spectra of various excavator working devices and can also be used for load spectrum tests of other structures bearing movable load action.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a method for testing the load spectrum of an excavator working device. Background technique [0002] The working conditions of the excavator are harsh and the load is complex. Under the long-term action of random load, the working device is prone to fatigue damage. The load spectrum is the basic data for structural fatigue design and fatigue test. For excavators, the accurate test of the bucket tip force and the force of each hinge point of the working device is the key to compiling the load spectrum of the whole machine and the load spectrum of the parts of the working device. [0003] Since the bucket is often subject to partial load and side load during excavator excavation, it is generally difficult to directly install sensors on the bucket tip to measure the load spectrum of the bucket tip. At present, there are usually two methods for testing the load spectr...

Claims

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Application Information

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IPC IPC(8): G01L5/00G01M99/00
CPCG01L5/0061G01M99/005
Inventor 向清怡吕彭民王斌华
Owner CHANGAN UNIV
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