Practical recommendations for creating a long-stroke hydraulic cylinder with intermediate support sensor unit
The analysis of the operational reliability of hydraulic road and building construction machines (RBCM) has shown that in their hydraulic drive the maximum percentage of failures falls on the hydraulic cylinders of the working equipment. During operation, as a rule, an obliquely located reciprocating cylinder with a one-sided rod as a result of longitudinal-transverse loading is deformed in a vertical longitudinal plane with the appearance of a complete deflection. At the same time, such a functional arrangement of the hydraulic power cylinder under load leads to an increase in reactions in its movable sealed couplings, which significantly worsens the operating conditions of the elements of these couplings, increases their temperature and increases the intensity of wear. The listed disadvantages of the traditional design of the hydraulic cylinder can be eliminated by bringing the hydraulic cylinder from the longitudinal-transverse bending state to the stability state or close to that through the support of the hydraulic cylinder body by an intermediate sensor support. At the same time, the design and support parameters are focused on supporting the hydraulic cylinder with the reduction to zero of the reaction in its least reliable joint "rod - guide bushing". The article provides practical recommendations for creating a hydraulic cylinder with an intermediate sensor support. Options for connecting an auxiliary hydraulic cylinder to the RBCM hydraulic system are offered, depending on the type of support for the main hydraulic cylinder, from below or from above. Based on the analysis of the reactions acting in its movable sealed joints, the parameters of the auxiliary hydraulic cylinder are determined. Depending on the design of the hydraulic powered working equipment of the RBCM, the design of its fastening is proposed.