公开(公告)号：US20210025373A1

公开(公告)日：2021-01-28

申请号：US16927316

申请日：2020-07-13

申请人： Eaton Intelligent Power Limited

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

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

摘要： 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.

公开(公告)号：US20200256326A1

公开(公告)日：2020-08-13

申请号：US15776365

申请日：2016-11-14

申请人： EATON INTELLIGENT POWER LIMITED

发明人： Anil Balasaheb KHARPAS ,  Robert Leslie ISAACS ,  Avinash Dadaso PATIL ,  Amit Ranjit PANCHAL ,  Yogiraj FIRAKE ,  Anil GHEGADE

IPC分类号： F04B1/324 ,  F04B49/00

摘要： A hydraulic pump system includes a pump control system operable to reduce electric current required at the start of the pump and reduce starting torque for the pump. The pump control system can include a gap between a spring seat and a valve spool such that the valve spool need not overcome a biasing force from a swash plate when the swash plate changes from its maximum displacement position to its neutral position.

公开(公告)号：US20200256404A1

公开(公告)日：2020-08-13

申请号：US16639999

申请日：2018-08-16

申请人： EATON INTELLIGENT POWER LIMITED

发明人： Richard Randel LYMAN, JR. ,  Anil Balasaheb KHARPAS ,  Avinash Dadaso PATIL ,  Sanjay Dhondappa MALI ,  Matthew Edward CRESWICK

IPC分类号： F16D31/02 ,  F16H61/423 ,  F16H61/433 ,  F04B49/12

摘要： Control systems and feedback assemblies for hydraulic axial displacement machines, such as pumps and motors. The control systems and feedback assemblies can reduce friction on the charging spools and provide for a more reliable return of the swashplate to a neutral position. Aspects of the control systems and feedback assemblies can be modularized for, e.g., easy maintenance and to reduce the overall size of the system.

公开(公告)号：US20200248553A1

公开(公告)日：2020-08-06

申请号：US16776172

申请日：2020-01-29

申请人： EATON INTELLIGENT POWER LIMITED

发明人： Anil Balasaheb KHARPAS ,  Nirmaljeet Kulvindarsingh JOHAL ,  Sanjay Dhondappa MALI ,  Avinash Dadaso PATIL ,  Richard Randel LYMAN ,  Matthew Edward CRESWICK

IPC分类号： F01B3/10 ,  F04B1/328

摘要： Control systems and feedback assemblies for hydraulic axial displacement machines, such as pumps and motors. The control systems and feedback assemblies can have enhanced adjustability.