Railcar damping device

摘要

A railcar damping device includes: a tank storing a liquid; a first opening/closing valve provided in a first passage connecting a rod side chamber to a piston side chamber, which are defined by a piston, to be capable of opening and closing the first passage; a second opening/closing valve provided in a second passage connecting the piston side chamber to the tank to be capable of opening and closing the second passage; and a pump that is driven to rotate at a predetermined normal rotation speed in order to supply the liquid from the tank to the rod side chamber, wherein a rotation speed of the pump is reduced when a thrust command value is smaller than a normal lower limit value, which is a lower limit value of a thrust that can be generated by the actuator when the pump is rotated at the normal rotation speed.

主权项

1. A railcar damping device that suppresses vibration of a vehicle body of a railcar by determining a thrust to be output by an actuator as a thrust command value and controlling the actuator,
wherein the actuator comprises: a cylinder coupled to one of a truck and the vehicle body; a piston inserted into the cylinder to be free to slide; a rod inserted into the cylinder and coupled to the piston and the other of the truck and the vehicle body; and a rod side chamber and a piston side chamber defined within the cylinder by the piston, wherein the railcar damping device comprises: a tank that is configured to store a liquid that is supplied to and discharged from the cylinder; a first opening/closing valve provided in a first passage connecting the rod side chamber to the piston side chamber to be capable of opening and closing the first passage; a second opening/closing valve provided in a second passage connecting the piston side chamber to the tank to be capable of opening and closing the second passage; a pump that is configured to be driven to rotate at a predetermined normal rotation speed in order to supply the liquid from the tank to the rod side chamber; and a control unit configured to:
compare the thrust command value with a preset normal lower limit value, which is a lower limit value of a thrust that can be generated by the actuator when the pump is rotated at the normal rotation speed, andreduce a rotation speed of the pump when the thrust command value is smaller than the preset normal lower limit value.