Three-degree-of-freedom electrohydraulic-mechanism numerically-controlled bucket wheel machine

Abstract

The invention discloses a three-degree-of-freedom electrohydraulic-mechanism numerically-controlled bucket wheel machine. The three-degree-of-freedom electrohydraulic-mechanism numerically-controlledbucket wheel machine comprises a travelling mechanism, a rack, a front cantilever lifting mechanism, a bucket wheel mechanism and a conveying system. The front cantilever lifting mechanism is a full-revolute-pair planar two-degree-of-freedom mechanism; under computer programming control, a drive rod drives a front cantilever to carry out pitching movement through the transmission of a connection rod, and then completes two-degree-of-freedom excavation working; the connection rod is a telescopic rod, composed of a cylinder body and a piston rod, and fully filled with a liquid; and the tipping load of the front cantilever can be effectively overcome and the problem of overload protection can be solved in actual engineering application. The numerically-controlled bucket wheel machine avoids the problems of high energy consumption, high maintenance cost and the like of a hydraulic bucket wheel machine, avoids the defects of low flexibility, small working space and the like of a pure mechanical bucket wheel machine, has the characteristics of being low in energy consumption, low in maintenance cost, high in reliability and the like, is larger in working space and higher in flexibility compared with a single-degree-of-freedom front cantilever lifting mechanism, and is powerful equipment for modernized industrial continuous loading and unloading for bulk materials.

Description

technical field [0001] The invention relates to the field of a jib type bucket wheel machine, in particular to a three-degree-of-freedom electro-hydraulic mechanism type numerically controlled bucket wheel machine. Background technique [0002] Bucket wheel machine, also known as bucket wheel stacker and reclaimer, is an efficient equipment for continuous loading and unloading of bulk bulk materials in modern industry. Stacking and reclaiming of coal, coke and other bulk materials. Bucket wheel machine has high continuous operation efficiency and strong regularity, so it can be divided into manual, semi-automatic and automatic control from the control point of view. Although the bucket wheel machine has been widely used in engineering operations, there are still many technical problems. [0003] There are mainly two ways of pitching the front cantilever of the existing boom-type bucket wheel machine. One is a purely mechanical boom-type bucket wheel machine. Reliability a...

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Problems solved by technology

[0003] There are mainly two ways of pitching the front cantilever of the existing boom-type bucket wheel machine. One is a purely mechanical boom-type bucket wheel machine. Reliability and transmission efficiency, but poor flexibility, because the bucket wheel machine is a low-speed heavy-duty equipment, in the process of continuous operation, the front cantilever bears a large load, and the purely mechanical structure of the jib type bucket wheel machine lacks overload protection. The body structure is very prone to rigid damage; the other is the boom-type bucket wheel machine with hydraulic structure, and the front cantilever realizes the pitching motion through the hydraulic cylinder. Although this type of bucket wheel machine has good flexibility, it has poor reliability and low mechanical efficiency. , high energy consumption, hydraulic system prone to oil leakage and other problems, high maintenance and use costs

If the controllable mechanism is directly introduced into the design of the boom-type bucket wheel machine, since the front cantilever bears a huge overturning load, and the mechanical structure of the boom-type bucket wheel machine cannot be synchronized through the hydraulic cylinder, the front cantilever structure, especially the plane parallel The two active rods bear large eccentric loads, and the design and manufacturing errors of the mechanism further aggravate the uneven load of the active rods, resulting in a decrease in the service life of the electric drive system and an increase in the failure rate

In addition, the front cantilever mechanism of the existing bucket wheel machine is a planar single-degree-of-freedom mechanism, which has a bulky structure, poor flexibility, and a small operating range, so that the bucket wheel mechanism installed on the front cantilever can efficiently perform complex stacking and reclaiming operations

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