Author(s): Yehan Geng
Keywords: Hydraulic elevator dam; Direct action type; Boosting type; Finite element analysis;
Abstract: This paper introduces the structural and performance characteristics of two kinds of lifting mechanisms of the hydraulic elevator dam, i.e. the boosting type and direct action type, calculates and analyses the force acting on the oil cylinder of the two lifting mechanisms at different angles of the dam surface under different operating conditions by theoretical calculation, and establishes a three-dimensional model (height of 4 m and width of 6 m)for the hydraulic elevator dam by using INVENTOR software, and imports ANSYS finite element analysissoftware to make finite element analysis on the hydraulic elevator dam surface and components of the twodifferent lifting mechanisms and study the stress distribution under different hydraulic working conditions. Theresults show that the direct action type lifting mechanism is more suitable for the hydraulic elevator dam whoseheight is 1-4m. It has a small cylinder diameter and long stroke. However, with the increase of the dam surfaceheight, the cylinder selection of direct action type hydraulic elevator dam is limited by the cylinder diameter andstroke, and the cost increases greatly. Comparatively speaking, the cylinder of boosting type hydraulic elevatordam has a larger diameter, shorter stroke and good stability, and the design of linkage mechanism obviouslyreduces the thrust of cylinder when starting the direct action and stationing of dam, prolongs the service life ofthe cylinder and also avoids restriction of the cylinder stroke of the direct action type lifting mechanism causedby the excess height of the dam surface. This study provides a theoretical basis for the future design anddevelopment of the hydraulic elevator dam.