公开(公告)号：US20240360849A1

公开(公告)日：2024-10-31

申请号：US18688359

申请日：2022-07-26

申请人： XUZHOU XCMG EXCAVATOR MACHINERY CO., LTD.

发明人： Yuefeng JIN ,  Jiawen GENG ,  Quan YUAN ,  Jian ZHANG ,  Yuzhong DONG ,  Dongyang DU ,  Yang ZHANG ,  Benqiang SUN ,  Heng MIAO ,  Jie LU ,  Xinkui ZHANG

IPC分类号： F15B13/04 ,  F15B1/26

CPC分类号： F15B13/0401 ,  F15B1/26 ,  F15B2013/0412

摘要： A hydraulic system for a rotary implement, including an oil tank, a main pump, a control valve, and a rotary motor is provided. The oil tank is connected to an oil suction port of the main pump; an oil outlet of the main pump is connected to a P port of the control valve; a T port of the control valve is interconnected with the oil tank; and A and B ports of the control valve are connected to both ends of the rotary motor. The control valve includes a compensation valve connected to the P port and the T port, an electric proportional valve connected to the P port and the compensation valve, and an electromagnetic reversing valve connected to the compensation valve, the T port and the B port.

公开(公告)号：US20230352257A1

公开(公告)日：2023-11-02

申请号：US17800713

申请日：2021-02-07

申请人： XUZHOU XCMG EXCAVATOR MACHINERY CO., LTD

发明人： Yadong LI ,  Jiawen GENG ,  Jian ZHANG ,  Bujun DONG ,  Yuzhong DONG ,  Fanjian MENG ,  Feifei ZHAO ,  Meng WEN

IPC分类号： H01H47/22

CPC分类号： H01H47/22 ,  H01H2047/025

摘要： The present invention relates to a relay protective device, a construction machine, a relay protection control method and apparatus, and a computer readable storage medium. The relay protective device includes: a power supply input contact; a relay protective module comprising a bistable relay and an output contact, wherein the bistable relay comprises a contact, a pull-in coil, and a release coil; an input terminal of the contact, an input terminal of the pull-in coil, and an input terminal of the release coil are connected to the power supply input contact; an output terminal of the contact is connected to the output contact; and a central control unit comprising a first port connected to the output contact, a second port connected to an output terminal of the pull-in coil, and a third port connected to an output terminal of the release coil; the central control unit is used for controlling the pull-in coil and the release coil to be alternately powered on so as to oscillate the contact when a voltage of the output contact is less than a first threshold and is not less than a second threshold, wherein the first threshold is less than a standard working voltage of the bistable relay, and the second threshold is the minimum allowable working voltage of the bistable relay.