Title:
CONTROL METHOD FOR CONTROLLING RETRACTION OF BOOM, SYSTEM, MECHANICAL DEVICE AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2023/134041
Kind Code:
A1
Abstract:
A control method for controlling retraction of a boom, a system, a mechanical device, and a storage medium, the control method for controlling retraction of the boom being applied to a hydraulic system that may combine self-weight retraction and pressure retraction of the boom. The hydraulic system comprises: a pressure retraction motor (7), a pressure retraction proportional valve (6) and a self-weight retraction proportional valve (3) which are placed in communication in sequence; a rodless cavity of the boom is in communication with the self-weight retraction proportional valve (3), and a rod cavity of the boom is in communication with the pressure retraction motor (7) and the pressure retraction proportional valve (6). The control method comprises: when the boom is retracted, controlling the self-weight retraction proportional valve (3) to be at a maximum opening; acquiring an actual speed of the boom during retraction; when the actual speed is less than a preset speed, controlling a rotation speed of the pressure retraction motor (7) to be increased or an opening degree of the pressure retraction proportional valve to be increased; and when the actual speed is greater than the preset speed, controlling the rotation speed of the pressure retraction motor (7) to be reduced or the opening degree of the pressure retraction proportional valve to be reduced.
Inventors:
ZOU JUNHUI (CN)
LIU GUOLIANG (CN)
SHI WEI (CN)
LIU GUOLIANG (CN)
SHI WEI (CN)
Application Number:
PCT/CN2022/086492
Publication Date:
July 20, 2023
Filing Date:
April 13, 2022
Export Citation:
Assignee:
HUNAN SINOBOOM INTELLIGENT EQUIPMENT CO LTD (CN)
International Classes:
F15B11/04; B66F11/04; F15B13/02
Foreign References:
| CN113790182A | 2021-12-14 | |||
| CN114165490A | 2022-03-11 | |||
| CN104609321A | 2015-05-13 | |||
| CN205154781U | 2016-04-13 | |||
| CN109296569A | 2019-02-01 | |||
| CN113321159A | 2021-08-31 | |||
| CN202829383U | 2013-03-27 | |||
| JPH09151487A | 1997-06-10 | |||
| JPH09279638A | 1997-10-28 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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