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    SYSTEM WITH MOTION SENSORS FOR DAMPING MASS-INDUCED VIBRATION IN MACHINES
    12.
    发明申请
    SYSTEM WITH MOTION SENSORS FOR DAMPING MASS-INDUCED VIBRATION IN MACHINES 有权

    公开(公告)号：US20220252090A1

    公开(公告)日：2022-08-11

    申请号：US17562449

    申请日：2021-12-27

    Applicant: Danfoss Power Solutions II Technology A/S

    Inventor： QingHui YUAN

    IPC: F15B21/00 ,  E04G21/04 ,  F15B13/01 ,  F15B15/20 ,  F15B20/00 ,  E02F9/22

    Abstract: A system for damping mass-induced vibrations in a machine having a long boom or elongate member, the movement of which causes mass-induced vibration in such boom or elongate member. The system comprises at least one motion sensor operable to measure movement of such boom or elongate member resulting from mass-induced vibration, and a processing unit operable to control a first control valve spool in a pressure control mode and a second control valve spool in a flow control mode in order to adjust the hydraulic fluid flow to the load holding chamber of an actuator attached to the boom or elongate member to dampen the mass-induced vibration. The system further comprises a control manifold fluidically interposed between the actuator and control valve spools that causes the first and second control valve spools to operate, respectively, in pressure and flow control modes.

    Hydraulic mechanical transmission
    14.
    发明授权
    Hydraulic mechanical transmission 有权

    公开(公告)号：US11339873B2

    公开(公告)日：2022-05-24

    申请号：US16778650

    申请日：2020-01-31

    Applicant: DANFOSS POWER SOLUTIONS II TECHNOLOGY A/S

    Inventor： QingHui Yuan

    IPC: F16H61/438 ,  F16H47/04 ,  F16H61/00 ,  F16H39/10 ,  F16H47/07 ,  F16H47/02 ,  F16H39/12 ,  F16H37/08

    Abstract: A hydraulic mechanical transmission includes a first hydraulic unit having a first shaft and a second hydraulic unit having a second shaft. The second hydraulic unit is connected in hydraulic fluid communication with the first hydraulic unit by high and low pressure lines. At least one of the first and second hydraulic units has variable displacement. A mechanical torque transfer arrangement transfers torque between the first shaft and the rotatable component of the second hydraulic unit. One of the first and second hydraulic units operates as a hydraulic pump and the other of the first and second hydraulic units operates as a hydraulic motor.

    ELECTROHYDRAULIC PROPORTIONAL PRESSURE CONTROL FOR OPEN CIRCUIT PUMP
    19.
    发明申请
    ELECTROHYDRAULIC PROPORTIONAL PRESSURE CONTROL FOR OPEN CIRCUIT PUMP 有权

    公开(公告)号：US20230041899A1

    公开(公告)日：2023-02-09

    申请号：US17855378

    申请日：2022-06-30

    Applicant: Danfoss Power Solutions II Technology A/S

    Inventor： Anil Balasaheb KHARPAS ,  Avinash Dadaso PATIL ,  Sanjay Dhondappa MALI ,  Amit Ranjit PANCHAL ,  Robert Leslie ISAACS

    IPC: F04B1/324 ,  F15B13/044 ,  G05D16/20 ,  F15B13/16 ,  F04B49/00 ,  F15B13/04 ,  F04B49/08 ,  F15B13/02

    Abstract: A pump control assembly for controlling a variable displacement hydraulic pump includes a spool mounted within a valve block. The spool is configured to move between a first and a second position within the valve block so as to selectively control the displacement of the attached pump. The pump control assembly further includes first and second chambers that each apply a force to opposite ends of the spool. The first chamber is positioned at a first end of the spool in fluid communication with a pump output port. The second chamber is positioned at a second end of the spool and in fluid communication with a hydraulic tank port and a proportional pressure reducing valve. The second chamber also includes a piston and first and second springs positioned on either side of the piston. The proportional pressure reducing valve provides a regulated pressure to a first side of the piston along with the first spring, and the hydraulic tank port provides a tank pressure on the opposite side of the piston along with the second spring. The pump control assembly also includes a stop structure having a positive stop that limits movement of the piston in a direction toward the first chamber.

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