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Backacting shovel hydraulic excavator performance integration characterization method

A hydraulic excavator, excavation performance technology, applied in the direction of mechanically driven excavator/dredger, machine/structural component testing, instruments, etc., can solve the problems of low performance, productivity and service life of excavators

Inactive Publication Date: 2017-05-31
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is a lack of research on characterizing the digging capacity of the backhoe hydraulic excavator in the usual action range of the excavation resistance system and the matching relationship between the working hydraulic cylinder and the working mechanism, resulting in relatively low performance, productivity and service life of the excavator

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  • Backacting shovel hydraulic excavator performance integration characterization method
  • Backacting shovel hydraulic excavator performance integration characterization method
  • Backacting shovel hydraulic excavator performance integration characterization method

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Embodiment Construction

[0077] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0078] This embodiment fully considers on the basis of the conventional action range of the excavation resistance system and the restrictive conditions of the whole machine in the excavation process, and proposes a method for comprehensively characterizing the excavator's excavation performance, and uses the method of the present invention to analyze the excavation performance of a certain 36-ton excavator analyzed and evaluated, figure 2 The excavation resistance system is simplified as the tangential excavation resistance F tangent to the tooth tip movement direction t , the normal excavation resistance F perpendicular to the direction of tooth tip movement n and the digging resistance moment M, where, F r is the resultant force of excavation resistance, α is the direction angle of the bucket, and β is the angle between the tangential ...

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Abstract

The present invention relates to a backacting shovel hydraulic excavator performance integration characterization method. On the basis of fully considering the nondeterminacy of the excavation resistance system, the usual effect interval of the excavation resistance coefficients and the resistance moment coefficients is obtained, a linear inequality formed by the interval and the complete machine restrictive condition is solved, the work voltages of three groups of hydraulic cylinders are inputted into a hexahedron space to map force output convex polyhedron space of the tail end of a shovel, and based on the polyhedron, a set of integration performance evaluation indexes configured to evaluate the excavator excavation performances and the proportion of each restricted condition is provided to measure the reasonability of the design of the excavator operating mechanism and matching relation of the operating mechanism and the hydraulic cylinder applied force. The backacting shovel hydraulic excavator performance integration characterization method is suitable for the quantitative analysis and the visualization representation of the excavator excavation performance of the excavation resistance system variable characteristics, provides a theoretical basis for the complete machine performance analysis of the backacting shovel hydraulic excavator, the reasonability evaluation of the design of the operating mechanism and the optimization design and improves the performances of the produced excavators.

Description

technical field [0001] The invention belongs to a performance index of construction machinery, and relates to a comprehensive characterization method for the digging performance of a backhoe hydraulic excavator. Background technique [0002] Backhoe hydraulic excavator, as one of the most important construction machinery, has been widely used in mining, farmland soil improvement, transportation construction and other projects. Since the hydraulic excavator mainly works in an unstructured environment, and its excavation objects are changeable, the excavation resistance also presents uncertainty. With the continuous improvement of operation quality requirements, people's requirements for hydraulic excavator excavation performance are also getting higher and higher. Designing an excavator with good excavation performance in an uncertain environment is of great significance for improving productivity and prolonging the service life of the excavator. The maximum digging force t...

Claims

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Application Information

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IPC IPC(8): G01M99/00E02F3/32
CPCE02F3/32G01M99/005
Inventor 邹智红陈进庞晓平
Owner CHONGQING UNIV
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