Shandong Meian Mining Equipment Co., Ltd. supplies hoist motor main bearing temperature vibration monitoring, brake shoe gap monitoring protection device, disc brake shoe online monitoring, brake disc runout monitoring, brake disc temperature detection, unattended hoist, hoist brake shoe gap protection device, overwind slack rope protection, hoist brake gap protection.

1.2 Main Purpose and Scope of Application

The coal mine hoist brake gap protection and brake shoe gap monitoring device is suitable for protecting and online monitoring and displaying the disc brake gap of mining hoists. When powered on, the displacement sensor and oil pressure sensor output a 4-20mA signal, which is transmitted to the main unit via a communication module for data processing. The converted corresponding data, i.e., real-time data of the hoist brake, is displayed online on the screen. When the brake shoe gap exceeds 2mm, and the brake oil pressure value is above the upper limit set value or below the lower limit set value, the data is analyzed to determine the output of a warning signal, and the device emits an audible alert.

The monitoring device is suitable for online monitoring and protection of brake shoe gap wear in coal mine hoist winches.

Main functions include real-time monitoring of brake shoe gap, brake disc runout, spring fatigue, idle time, and pipeline oil pressure value for each brake; recording fault information with voice alerts; and enabling log queries. Main technical indicators include: intelligent detection device for online monitoring of brake shoe gap protection.

1. Real-time online detection and synchronous display of brake gap value, with an accuracy within ±0.1mm;

2. Online monitoring of temperature and vibration for the main bearings of the hoist winch motor, drum main shaft, gearbox, and head sheave;

3. Online monitoring of hoist disc brake shoes and disc brake monitoring;

4. Real-time detection of brake gap value, with alerts when exceeding the specified value (2mm) and output of the signal via dry contacts to the main control system (locking the drive). Measurement accuracy up to 0.01mm;

5. Online monitoring and protection functions for brake gap over-limit, brake shoe wear over-limit, spring fatigue over-limit, brake disc runout, temperature (motor, gearbox, drum main shaft bearing), and vibration (motor, gearbox, drum main shaft bearing). Audible and visual or voice alerts are issued upon over-limit conditions, and the next drive is locked after over-limit protection. At least one dry contact output for each function is reserved for future system expansion or provision to other related electrical control equipment and devices;

6. Real-time detection of spring pressure, with alerts when spring fatigue occurs;

7. Real-time monitoring of brake disc runout, with alerts when exceeding standards;

8. Capable of storing 5000 fault records, facilitating maintenance personnel to monitor faulty brake heads;

9. Capable of storing the gap curve values for each pair of brake heads;

10. Calculating the number of actions for each brake, serving as reference data for replacing brake disc springs and brake shoes;

11. Equipped with infrared temperature sensors to prevent brake disc overheating and brake shoe burning due to incomplete brake release;

12. Real-time online detection and synchronous display of brake oil pressure value, with an accuracy of ±0.1MPa;

To monitor the hydraulic station return oil braking parameters, oil pressure sensors are installed to monitor the secondary braking pressure in the hydraulic braking system;

13. Self-adjustment and setting of brake gap value parameters, with over-limit alert function;

14. Self-adjustment and setting of brake oil pressure value parameters, with over-limit alert function; brake shoe gap protection;

15. Automatic correction function for brake gap calculation errors;

16. Fault self-diagnosis function;

17. Capable of monitoring brake disc temperature, with over-temperature alerts and user-set thresholds;

18. Overspeed protection function: When the hoisting speed exceeds 15% of the MAX speed, the optical signal indicates control relay action;

19. Real-time display of data such as brake gap and oil pressure value, alert data query, and alerts or hoist locking after over-limit conditions or faults. Features a three-dimensional dynamic monitoring screen, consistent with the actual equipment situation of the brake, vividly reflecting equipment operation status;

20. Online monitoring function for brake disc runout;