The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 2021
Filed:
Dec. 21, 2016
Zhejiang University, Zhejiang, CN;
Guofang Gong, Zhejiang, CN;
Xu Yang, Zhejiang, CN;
Lintao Wang, Zhejiang, CN;
Chao Wang, Zhejiang, CN;
Yakun Zhang, Zhejiang, CN;
Weiqiang Wu, Zhejiang, CN;
Tong Liu, Zhejiang, CN;
Liwen Duan, Zhejiang, CN;
ZHEJIANG UNIVERSITY, Zhejiang, CN;
Abstract
A drive system with both fixed-displacement hydraulic motors and variable-displacement hydraulic motors for a cutter head of a boring machine and a control method thereof are provided. The drive system includes a variable-displacement hydraulic motor group, a fixed-displacement hydraulic motor group and a variable-displacement hydraulic pump group. The variable-displacement hydraulic motor group, the fixed-displacement hydraulic motor group, and the variable-displacement hydraulic pump group are all connected to a main oil circuit of a cutter head system of the boring machine. The variable-displacement hydraulic pump group inputs flow to the main oil circuit; and, the variable-displacement hydraulic motor group and the fixed-displacement hydraulic motor group acquire flow from the main oil circuit. Displacements of the fixed-displacement hydraulic motor group and the variable-displacement hydraulic motor group are set in a way of specific displacement combination. The present invention decreases an engineering cost, and improves system reliability and efficiency.