Drive system with both fixed-displacement hydraulic motors and variable-displacement hydraulic motors for cutter head of boring machine and control method thereof

Patent metadata

Field	Value
Publication number	US-2020032650-A1
Application number	US-201616335667-A
Country	US
Kind code	A1
Filing date	Dec 21, 2016
Priority date	Dec 21, 2016
Publication date	Jan 30, 2020
Grant date	—

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.

First claim

1 - 12 . (canceled)

13 . A drive system with both fixed-displacement hydraulic motors and variable-displacement hydraulic motors for a cutter head of a boring machine, comprising a variable-displacement hydraulic motor group, a fixed-displacement hydraulic motor group, and a variable-displacement hydraulic pump group, wherein: 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.

14 . The drive system with both the fixed-displacement hydraulic motors and the variable-displacement hydraulic motors for the cutter head of the boring machine, as recited in claim 13 , wherein: the drive system is constructed with both the fixed-displacement hydraulic motors and the variable-displacement hydraulic motors; displacements of the fixed-displacement hydraulic motor group and the variable-displacement hydraulic motor group are set in a way of displacement combination; and a rotational speed of the cutter head of the boring machine is determined by the displacements of the two motor groups and a displacement of the pump group.

15 . The drive system with both the fixed-displacement hydraulic motors and the variable-displacement hydraulic motors for the cutter head of the boring machine, as recited in claim 13 , wherein: the variable-displacement hydraulic motor group comprises multiple variable-displacement hydraulic motors which are connected to the main oil circuit in parallel; two ends of each variable-displacement hydraulic motor are respectively connected to two circuits of the main oil circuit; the variable-displacement hydraulic motors in the variable-displacement hydraulic motor group are controlled simultaneously or respectively.

16 . The drive system with both the fixed-displacement hydraulic motors and the variable-displacement hydraulic motors for the cutter head of the boring machine, as recited in claim 14 , wherein: the variable-displacement hydraulic motor group comprises multiple variable-displacement hydraulic motors which are connected to the main oil circuit in parallel; two ends of each variable-displacement hydraulic motor are respectively connected to two circuits of the main oil circuit; the variable-displacement hydraulic motors in the variable-displacement hydraulic motor group are controlled simultaneously or respectively.

17 . The drive system with both the fixed-displacement hydraulic motors and the variable-displacement hydraulic motors for the cutter head of the boring machine, as recited in claim 13 , wherein: the fixed-displacement hydraulic motor group comprises multiple fixed-displacement hydraulic motors which are connected to the main oil circuit in parallel; two ends of each fixed-displacement hydraulic motor are respectively connected to two circuits of the main oil circuit.

18 . The drive system with both the fixed-displacement hydraulic motors and the variable-displacement hydraulic motors for the cutter head of the boring machine, as recited in claim 14 , wherein: the fixed-displacement hydraulic motor group comprises multiple fixed-displacement hydraulic motors which are connected to the main oil circuit in parallel; two ends of each fixed-displacement hydraulic motor are respectively connected to two circuits of the main oil circuit.

19 . The drive system with both the fixed-displacement hydraulic motors and the variable-displacement hydraulic motors for the cutter head of the boring machine, as recited in claim 13 , wherein: the number of the fixed-displacement hydraulic motors in the fixed-displacement hydraulic motor group is determined by taking an integer portion m of a motor number x obtained through calculating a formula of

x
=

V

V

g



max

;

in the formula of

x
=

V

V

g



max

,

V g max represents a maximum displacement of each fixed-displacement hydraulic motor, and V represents a required motor displacement for reaching a highest designed rotational speed, which is determined according to an actual engineering load; and
the number of the variable-displacement hydraulic motors in the variable-displacement hydraulic motor group is n−m; n is a design motor number of the cutter head of the boring machine; a designed minimum value of displacement of each variable-displacement hydraulic motor is

x
-
m

n
-
m



·

V

g



max

,

and a designed maximum value is V g max ′; V g max ′ represents the maximum displacement of each variable-displacement hydraulic motor.

20 . The drive system with both the fixed-displacement hydraulic motors and the variable-displacement hydraulic motors for the cutter head of the boring machine, as recited in claim 16 , wherein: the number of the fixed-displacement hydraulic motors in the fixed-displacement hydraulic motor group is determined by taking an integer portion m of a motor number x obtained through calculating a formula of

x
=

V

V

g



max

;

in the formula of

x
=

V

V

g


Assignees

• Univ Zhejiang

Inventors

• Gong Guofang
• Yang Xu
• Wang Lintao
• Wang Chao
• Zhang Yakun
• Wu Weiqiang
• Liu Tong
• Duan Liwen

Classifications

• E21D9/093 Primary

  Control of the driving shield {, e.g. of the hydraulic advancing cylinders (arrangement of measuring or indicating devices for use during driving of tunnels E21D9/003)} · CPC title

• E21D9/1086

  Drives or transmissions specially adapted therefor · CPC title