Abstract
The article presents the technical solution for the location of cutting elements relative to the rotation center of Geohod for destructing rocks with a strength up to 1 of Protodyakonov hardness. The relevancy of the research is considered. General information about Geohod is given. The features of working body of Geohod are described, in particular, the formation of a complex shape of the face and the working body, and it is also said that in the case of screw movement of working body of Geohod to the face, the points of working body form a helicoidal (helical) surface. To set the purpose and objectives of the study the geometric parameters of generatrix are justified. The parameter depending on the number of blades and on the radius of location of the blade’s cut is identified. Based on the study, the dependence of the number of blades on their location from the center to the periphery is determined. The design of blade working body of Geohod for rocks with a strength f <1 of Protodyakonov hardness is offered. Also the directions for further research have been identified, which include: the development of methods for calculating cutting forces for a technical solution for the location of cutting elements relative to the center of rotation of Geohod for destructing rocks up to 1 of Protodyakonov hardness; the application of this technique for obtaining variants of the blade working body of Geohod of different types.
Highlights
One of the priority directions in the development of science, technology and aquipment in the Russian Federation is the need for effective use of space, including underground space [1]
The geometric parameters of helicoid are the length of generatrix, equal to the radius of the head section, and the pitch of helicoid is taken equal to the pitch of helical blade [16]
From the study [7], the rational number of blades for Geohod working body is in the range from 2 to 12
Summary
One of the priority directions in the development of science, technology and aquipment in the Russian Federation is the need for effective use of space, including underground space [1]. A distinctive feature of Geohod is screwing of the hull into the rock array, which fulfills the function of the mobile support In this way, pressure forces are created as a result of the introduction of propulsion elements into the contour array and the use of a normal reaction that occurs when the elements of Geohod interact with the rocks array. Pressure forces are created as a result of the introduction of propulsion elements into the contour array and the use of a normal reaction that occurs when the elements of Geohod interact with the rocks array Developments in this area led to the creation of the first samples of Geohods - screw-boring penetrator units (VPA) ELANG-3 and ELANG4 (Fig. 1) [8,9,10]. A prototype of Geohod with working body for destructing rocks of medium strength has been created (Figure 2) [11,12,13,14
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