The article presents a variant of improving the design of the working equipment of a single-bucket excavator. The proposed technical solution allows the development and sampling of solid and frozen soil without changing the working equipment from the bucket to the hydraulic hammer. The result is achieved by installing two hydraulic hammers on the front part of the bucket. Presents calculations of the hydraulic system of the excavator and hydraulic hammers, allowing to confirm the performance of the proposed solution. The methodology of technological operations is determined taking into account the use of the proposed technical solution.
The article addresses a current issue – reducing the vibration load at the operator’s workplace in the utility machine with respect to the use of chassis elements as vibroprotection element. The results of studies aimed at determining the effect of tires dynamic characteristics on the vibration load of the operator’s workplace are presented. A computational scheme designed to conduct experimental research has been shown. Correlation between tire rigidity and air pressure in the tire, as well as correlation between tire service life and tire pressure have been revealed. Results of studies aimed at determining relations between the dynamics of mean-square values of vibration acceleration of the frame, the floor and the operator’s seat, and the rigidity coefficients of utility machine tires. Conclusions have been made as to the relevance of using chassis elements as vibroprotection element at the operator’s workplace in the utility machine.
The article reflects the results of theoretical studies aimed at improving the equipment of the chain trencher. The proposed design allows the development of trenches on the sides of the pipeline. In addition, with the help of a cutter drum equipped with a rotary mechanism, the equipment removes soil from under the repaired pipe section. To confirm the health of the proposed technical solution, calculations were made of the power of consumption on the drive chain of the work equipment and cutter drum. When developing the design, calculations were made to determine the diameter of the shaft and check the splined joint for crumpling.
The article presents the option of improving the working equipment of the tunnel-boring complex for laying underground utilities, including trunk pipelines. The method of trenchless laying of underground utilities, consisting in a combination of methods of horizontal directional drilling and micro-channeling, is proposed. The proposed technology does not require the construction of a preliminary mine and a site for the installation of a drilling machine and allows one to combine in one working step the drilling of a well, the laying of a pipeline, welding and insulation works. Presents calculations aimed at determining the forces of movement of the shield, the definition of the power of the shield, as well as the calculation of the strength of the shield. The technique of carrying out technological operations is demonstrated taking into account the use of the proposed technical solution.
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