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System with motion sensors for damping mass-induced vibration in machines

A motion sensor, mass technology, applied in the field of hydraulic system, can solve problems such as not very effective

Active Publication Date: 2020-08-14
DANFOSS POWER SOLUTIONS II TECH AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such methods are not very effective unless mechanical compliance is also carefully addressed

Method used

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  • System with motion sensors for damping mass-induced vibration in machines
  • System with motion sensors for damping mass-induced vibration in machines
  • System with motion sensors for damping mass-induced vibration in machines

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Example 1. In conjunction with or independently of any of the embodiments disclosed herein, there is provided an apparatus for dampening mass-induced vibration in a machine, the apparatus comprising an elongated member and a hydraulic actuator configured to move the elongated member The elongate member has a non-load-holding chamber and a load-holding chamber that includes a motion sensor operable to measure motion of the elongate member caused by mass-induced vibrations. The apparatus includes a plurality of control valve spools operable to supply a variable flow rate of hydraulic fluid to a hydraulic actuator. The apparatus includes a control manifold fluidly interposed between the hydraulic actuator and the plurality of control valve spools. The apparatus includes a processing unit operable with the control manifold to control flow of hydraulic fluid to the hydraulic actuator based at least in part on measurements of motion of the elongate member received from a mot...

Embodiment 2

[0041] Example 2. In conjunction with or independently of any of the embodiments disclosed herein, the motion sensor includes a first motion sensor located at a first location along the elongated member, and the device further includes a first motion sensor located at a second location along the elongated member. Two motion sensors. The second location is different from the first location.

Embodiment 3

[0042] Example 3. In conjunction with or independently of any of the embodiments disclosed herein, the apparatus further includes a plurality of control valve sensors operable to measure the pressure of hydraulic fluid exiting the control valve spool. The control manifold is also operable to control the flow of hydraulic fluid to the hydraulic actuators.

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PUM

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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 spoolin 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.

Description

[0001] Cross References to Related Applications [0002] This patent application was filed as a PCT International Patent Application on April 25, 2018 and claims U.S. Patent Application Serial No. 62 / 491,880 filed April 28, 2017 and U.S. Patent Application Serial No. filed on July 14, 2017 62 / 532,743, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates generally to the field of hydraulic systems and, more particularly, to systems for dampening mass-induced vibrations in machines. Background technique [0004] Many of today's mobile and stationary machines include long booms or slender members that can be extended, telescopic, raised, lowered, rotated or otherwise moved by the operation of hydraulic systems. Examples of such machines include, but are not limited to: concrete pump trucks with articulating multi-section booms; fire ladder trucks with extendable or telescoping multi-section ladders;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B21/00F15B21/08
CPCE04G21/0436F15B2211/3057F15B2211/327F15B2211/5059F15B2211/6313F15B2211/6336F15B2211/634F15B2211/8613F15B2211/8616F15B21/008E04G21/0454F15B13/01F15B15/202F15B20/00E02F9/2207
Inventor 袁庆辉
Owner DANFOSS POWER SOLUTIONS II TECH AS
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