Method for collaboratively controlling multi-channel braking system of mine hoist

Patent metadata

Field	Value
Publication number	US-12330909-B2
Application number	US-202318690743-A
Country	US
Kind code	B2
Filing date	Aug 3, 2023
Priority date	Sep 15, 2022
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

The present disclosure discloses a method for collaboratively controlling a multi-channel braking system of a mine hoist, including obtaining the abrasion loss of the brake shoe by detecting position information of the brake shoe of each of disc brakes in real time, dividing abrasion loss levels by determining different abrasion degrees of the brake shoe, formulating three braking force distributing modes: an average distribution, a proportional distribution, and an index distribution according to the abrasion loss levels, thereby dynamically adjusting a set braking pressure of each of the disc brakes, tracking and controlling the set braking pressure through the disc brakes by adopting a pressure closed-loop control method by utilizing a pressure signal feedback from an oil pressure sensor, implementing a collaborative braking control of the multi-channel braking system of the mine hoist based on the abrasion loss of the brake shoe.

First claim

What is claimed is:

1. A method for collaboratively controlling a multi-channel braking system of a mine hoist, wherein the control method is based on the multi-channel braking system, the multi-channel braking system comprises a plurality of disc brakes, each of the disc brakes is controlled by an independent proportional control valve, and an oil pressure sensor and a displacement sensor are arranged on each of the disc brakes, and the control method includes following steps:
Step S1, respectively measuring, by utilizing the displacement sensor, initial position information x is0 and x iy0 of a brake shoe as well as an initial thickness Δ i0 of the brake shoe in a case where each of the disc brakes is completely released and compressed, where i denotes an i_th disc brake;
Step S2, recording, by utilizing the displacement sensor, a position x is of the brake shoe when the disc brake is completely released before a braking command is issued, and a position x iy of the brake shoe when the disc brake is fully compressed after the braking command is issued, in a case where a hoist system is officially put into use;
Step S3, calculating, according to the measured position information of the disc brake, an abrasion loss Δ i of the brake shoe, and a total abrasion loss Δ sum =Σ i=1 n Δ i of the brake shoe in the braking system, where n denotes a number of the disc brakes and an average abrasion loss of the brake shoe is denoted as Δ avg =Σ i=1 n Δ i /n, calculating, according to the physical quantities, a percentage λ avg of the average abrasion loss of the brake shoe relative to the total abrasion loss of the brake shoe, and a calculation formula of the percentage λ avg being:

λ
avg

=

Δ
avg

Δ
sum

=

1
n

,

Step S4, calculating a percentage λ i of an abrasion loss of the brake shoe of the i_th disc brake relative to the total abrasion loss, and an abrasion loss rate η i of the brake shoe of the i_th disc brake, and calculation formulas of the percentage λ i and the abrasion loss rate η i being:

λ
i

=

Δ
i

Δ
sum

=

(

x
iy

-

x
is

)

-

(

x

iy
⁢
0

-

x

is
⁢
0

)

∑

i
=
1

n

⁢

Δ
i

,

η
i

=

Δ
i

Δ

i
⁢
0

;

Step S5, dividing, by comparing λ i with λ avg , an abrasion loss degree of the brake shoe of the disc brakes into three abrasion loss levels; classifying, in a case of λ i ≤k 1 λ avg , as an abrasion loss level I, classifying, in a case of k 1 λ avg <λ i ≤k 2 λ avg , as an abrasion loss level II, and classifying, in a case of λ i >k 2 λ avg , as an abrasion loss level III; according to different abrasion loss levels of the brake shoe of the disc brakes, three different distributing means are executed on a total required braking force F ref , where k 1 and k 2 denote coefficients for dividing the abrasion loss level of the brake shoes respectively;
Step S6, a total braking force F sum obeying an equal distribution principle, setting a braking force distribution value F i of the disc brakes as

F
i

=

F
sum

n

,

in a case where the abrasion loss level of the brake shoe of the disc brakes is the abrasion loss level I;
Step S7, the total braking force F sum obeying a proportional distribution principle, setting the braking force distribution value F i of the disc brakes as

F
i

=

F
sum

·

Δ

i
⁢
0

-

Δ
i

∑

i
=
1

n

Assignees

• Univ China Mining

Inventors

• Tang Yu
• Zhu Zhencai
• Shen Gang
• Lu Hao
• Peng Yuxing
• Zhou Gongbo
• Xie Hui
• Wang Wei
• Bai Deen
• Wang Qingguo

Classifications

• B66B5/02

  responsive to abnormal operating conditions · CPC title

• F16D2066/005

  Force, torque, stress or strain · CPC title

• F16D2066/003

  Position, angle or speed · CPC title

• F16D2121/02

  Fluid pressure · CPC title

• F16D66/026 Primary

  indicating different degrees of lining wear · CPC title