Device and method for preventing static retraction of crane telescopic mechanism

• Main Authors: WANG SHUAI, LIU DONGHONG, DONG WENBIN, GAO DEHUA
• Format: Patent
• Language: Chinese; English
• Published: 09.07.2024
• Subjects: CRANES; HAULING; HOISTING; LIFTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; PERFORMING OPERATIONS; TRANSPORTING

The invention discloses a device and a method for preventing static retraction of a telescopic mechanism of a crane, which are characterized in that on the basis of an existing rope row type telescopic system, a pressure sensor is added for detecting the pressure of a rodless cavity of a telescopic oil cylinder, and a controller is added for comparing the pressure before and after static retraction of the rodless cavity; and after the pressure drop is detected, the two-position two-way reversing valve is controlled to be electrified and the oil supplementing pump is controlled to work, so that the purposes of supplementing oil to the rodless cavity to the pressure before standing and finally eliminating the retraction amount of the telescopic mechanism are achieved. 本发明公开了一种起重机伸缩机构防静置回缩的装置及方法，本发明基于现有绳排式伸缩系统基础上，增加一个压力传感器，用于检测伸缩油缸无杆腔压力，增加一个控制器用来比较无杆腔静置前后压力，并在检测到压力下降后控制二位二通换向阀得电及补油泵工作，实现向无杆腔补油至静置前压力，并最终消除伸缩机构回缩量的目的。