Damper for pantograph and method for adjusting maximum tensile damping force

Abstract

The invention provides a damper for a pantograph. The damper comprises an oil storage cylinder, an oil cylinder, a guide, a piston rod, a piston, hydraulic oil and a bottom valve seat, wherein a plurality of throttling holes are formed in the piston rod; one end of each throttling hole communicates with a through oil hole; the other end of each throttling hole is designed as an opening which facesthe exterior of the piston rod; the opening of each throttling hole can be exposed to the interior of a cavity I and / or is covered by the guide; at least two throttling holes are distributed at different positions along the axial direction of the piston rod; and a gasket is arranged between the inner end along the axial direction of the oil cylinder and the bottom valve seat, and used for adjusting the maximum tensile damping force in the outward tensile stroke of the piston rod. According to the damper provided by the invention, a conventional structure for adjusting the maximum tensile damping force through a nut, a spring and a valve plate is canceled and changed to a structure for adjusting the maximum tensile damping force by additionally mounting gaskets of different thicknesses. The damper is simple and feasible, and convenient to maintain.

Description

technical field [0001] The invention relates to a damping throttling and sealing device, in particular to a damper applied to pantographs of rail transit vehicles such as electric locomotives, urban rail vehicles, and EMUs. Background technique [0002] The pantograph is a key component of rail transit vehicles such as electric locomotives, urban rail vehicles, and EMUs. It is installed on the roof of rail transit vehicles. Teleported to the car for locomotive use. A pantograph usually includes: chassis, damper, bow lifting device, lower arm, bow assembly, lower guide rod, upper arm, upper guide rod, bow head, slide plate and bow air source control valve plate and other mechanisms, while the damper Installed between the base frame and the lower arm. The fluency of the pantograph collecting current from the catenary is related to the contact pressure, transition resistance, and contact area between the slide plate and the catenary, and depends on the interaction between the...

AI Technical Summary

Problems solved by technology

Although the patent provides a scheme for adjusting the maximum damping force of the damper, in this scheme, spring valve discs are arranged on the end surface of the piston close to the chamber I of the cylinder and the end surface of the piston close to the chamber II. Specifically, the maximum tensile damping force is fine-tuned through nuts, springs and valve plates. Such a structure is very easy to loosen, so it is not reliable to use this structure to adjust the maximum tensile damping force of the damper.

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