The wear of the lifting beam is caused by the lifting of the beam and the roughening of the beam surface without the machined surface. The clearance between the beam and the beam pin is large, the local force is severe, and the working friction is dry. Under the condition of impact load and static load, the beam is raised. The hole is severely worn and has an elliptical shape. We take the following repair measures: direct fill welding. According to the technical requirements of the original drawings of the beam, it is a direct casting. Originally, we used the direct fill welding method for repair (see welding current and electrode selection), and after filling the original paper size requirements, it was put into use without any processing. Because the surface is quite rough, the wear of the beam hole itself and the beam pin is intensified. Although the maintenance period is convenient, the service life is extremely short.
When welding, the weight of the welding rod is heavier than that of the sliding vane air compressor, which makes the machine room appear narrow and the noise is larger than that of the vane type air compressor. However, in general, the improvement is successful, and the effect of use is better every year. Because the direct fill welding is not ideal, mainly due to the rough surface, the operating rate has increased from 56% to 56%. At the bottom of the list, all indicators are among the best in the same industry in the country.
When lifting the beam, it mainly plays the role of pulling up the bucket. In addition to pulling up the bucket, it also needs to assist in the excavation. As the structure of the rock is changed, the impact load is very large. After the excavation is finished, the shovel is pulled up. The material in the bucket and bucket is mainly subjected to static load; the worn beam hole is welded to the right to ensure that there is sufficient machining allowance, and the hole is drilled as required. When the bucket is naturally placed on the ground, it mainly bears its own weight and is subjected to force. small. However, after a period of use, the hole is ground into an oval shape and repaired again.
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