CONSTANT DECELERATING HYDRAULIC SYSTEM FOR SAFE SHIFTING BRAKING OF HOISTER AND BRAKING METHOD

WIPO Patent Application WO/2020/248406

A1

A constant decelerating hydraulic system for the safe shifting braking of a hoister, comprising an oil tank (1), a motor (2), a variable displacement pump (3), an electromagnetic proportional overflow valve (4), a check valve, an energy accumulator, an electromagnetic overflow valve (7), pressure reducing valves, a damper brake set (12), a plurality of electromagnetic reversing valves, and an electromagnetic proportional reversing valve (G5). A braking method for the constant decelerating hydraulic system for the safe shifting braking of the hoister. A circumstance in which the pressure of the energy accumulator rapidly increases during a braking process and a hoisting system is impacted is avoided by means of different reversing operations of the electromagnetic proportional reversing valve (G5), the oil pressure of the damper brake set (12) is linearly and slowly reduced, and the stable deceleration a hoisting container is maintained. When constant decelerating fails, second-stage braking is immediately performed, and a first pressure reducing valve (8.1) and a second pressure reducing valve (8.2) which are provided are used to ensure that the pressure of the hoisting system is first reduced to the set second-stage braking oil pressure value at the stable speed, such that the hoister is in a semi-braking state; and after a period of time, the pressure is reduced to zero to achieve complete braking. The foregoing braking mode may prevent a circumstance in which the hoisting system is impacted by second-stage braking after the constant decelerating braking function fails, and braking reliability is thus ensured.

SUN ZHENG (CN)
ZHANG XIAOGUANG (CN)
XU WENTAO (CN)
XU GUIYUN (CN)
JIANG QI (CN)
SUN JIASHENG (CN)
ZHANG CHUNMEI (CN)
HOU JIANHUA (CN)
LI HUI (CN)
GUO XUEJUN (CN)

PCT/CN2019/105023

December 17, 2020

September 10, 2019

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UNIV ZAOZHUANG (CN)
XUZHOU DAHENG MEASUREMENT AND CONTROL TECH CO LTD (CN)
SHANXI HOBAOGANHE COAL MINE CO LTD (CN)

B66D5/26; F15B1/02; F15B13/02

CN108249339A	2018-07-06
CN206232360U	2017-06-09
CN103950859A	2014-07-30
CN109812457A	2019-05-28
CN207330219U	2018-05-08
CN103573729A	2014-02-12
JP5134831B2	2013-01-30
DE19962648A1	2000-07-06

NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)

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