Feeding method of crusher

Abstract

The invention provides a crusher feeding method which comprises the following steps: (1) monitoring real-time rotating speeds of a crusher transmission shaft and a motor output shaft when a crusher is in overload operation, and calculating to obtain a threshold value; and (2) the feeding amount is adjusted according to the threshold value, when the threshold value is 0.8-1, the original feeding amount is kept unchanged, when the threshold value is 0.6-0.8, the feeding amount is reduced by 10-30%, when the threshold value is 0.3-0.6, the feeding amount is reduced by 40-60%, and when the threshold value is smaller than 0.3, the machine is stopped immediately. The feeding amount is adjusted in real time by calculating the threshold value according to the threshold value, static feeding of the crusher is changed into dynamic feeding, the problem that the triangular belt slips and stalls due to the fact that the feeding particle size and the feeding amount of the crusher are increased and the crusher is overloaded is solved, and the situation that the triangular belt is expanded and burnt due to stalling faults caused by overload and looseness of the triangular belt is prevented; and the service life of the triangular belt of the crusher is effectively prolonged, meanwhile, the production efficiency is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of crushing technology and relates to a crusher feeding method. Background Technology

[0002] Crushers are crucial equipment in ore crushing processes. They primarily perform multi-stage crushing, and the size of the crushed particles affects the normal operation of downstream processing equipment. Insufficient feed to the crusher results in ore falling through without being crushed, leading to uneven particle size. Excessive feed can cause belt slippage and blockage. A reasonable and normal feed rate can fill the crusher cavity, achieving uniform ore output, preventing belt burnout and blockage, and reducing crusher operating costs.

[0003] After the machine is shut down due to a blockage and stockpiling, the ore inside the crusher's crushing chamber needs to be manually cleaned, which takes 4 hours. The cleaning process cannot be done by machinery and must be done entirely by hand, which greatly increases the risk of ore falling and injuring people. Summary of the Invention

[0004] The purpose of this invention is to address the problem of belt slippage and blockage caused by changes in material particle size when feeding material to a crusher, and to provide a crusher feeding method.

[0005] Therefore, the present invention adopts the following technical solution: A method for feeding a crusher, characterized by comprising the following steps: (1) When the crusher is overloaded, monitor the real-time speed of the crusher drive shaft and motor output shaft, and calculate the threshold. (2) Adjust the feeding amount according to the threshold. When the threshold is 0.8-1, maintain the original feeding amount. When the threshold is 0.6-0.8, the feeding amount decreases by 10-30%. When the threshold is 0.3-0.6, the feeding amount decreases by 40-60%. When the threshold is less than 0.3, stop the machine immediately.

[0006] Further, the threshold in step (1) is calculated according to the following formula: Threshold = (Rdrive shaft * Dcrusher) / (Rmotor * Dmotor) In the formula, R_driveshaft is the speed of the crusher driveshaft, R_motor is the speed of the motor, D_crusher is the diameter of the crusher V-belt pulley, and D_motor is the speed of the motor V-belt pulley.

[0007] Furthermore, in step (2), when the threshold is 0.6-0.8, the material supply decreases by 20%, and when the threshold is 0.3-0.6, the material supply decreases by 50%.

[0008] The beneficial effects of this invention are as follows: by calculating a threshold and adjusting the feed rate in real time according to the threshold, the static feeding of the crusher is changed to dynamic feeding. This solves the problem of the crusher slipping and blocking due to overload caused by the increase in the size and quantity of the feed material, and prevents the crusher from being overloaded and the V-belt from becoming loose, which can lead to the expansion of the blockage failure, burn the V-belt, and ultimately cause the machine to stop due to material accumulation. This effectively improves the service life of the crusher's V-belt, while also increasing production efficiency and reducing maintenance costs. Detailed Implementation

[0009] The present invention will be described in detail below with reference to embodiments: A method for feeding materials into a crusher includes the following steps: (1) When the crusher is overloaded, monitor the real-time speed of the crusher drive shaft and the motor output shaft, and calculate the threshold. Specifically, the speed of the crusher drive shaft and the motor output shaft can be monitored in real time through the corresponding speed sensor. Since the crusher drive shaft is connected to the motor output shaft through the pulley, it is also necessary to measure the diameter of the crusher V-belt pulley and the motor V-belt pulley, and then calculate the threshold using the following formula: Threshold = (Rdrive shaft * Dcrusher) / (Rmotor * Dmotor) In the formula, R_driveshaft is the speed of the crusher driveshaft, R_motor is the speed of the motor, D_crusher is the diameter of the crusher V-belt pulley, and D_motor is the diameter of the motor V-belt pulley.

[0010] (2) After calculating the threshold, the feed rate can be adjusted according to the threshold. The smaller the threshold, the slower the speed of the crusher drive shaft, the more serious the slippage between the crusher's V-belt pulley and the belt, and the more serious the stalling. When the threshold is 0.8-1, the original feed rate is maintained. When the threshold is 0.6-0.8, the feed rate is reduced by 10-30% based on the original feed rate. Specifically, the feed rate can be reduced by 20% to alleviate the stalling. After the threshold recovers to 0.8-1, the original feed rate is adjusted back. When the threshold is 0.3-0.6, the feed rate is reduced by 40-60%. Specifically, the feed rate can be reduced by 50%. After the threshold recovers to 0.8-1, the original feed rate is adjusted back. When the threshold is less than 0.3, the overload phenomenon is serious and the machine needs to be stopped immediately.

[0011] After dynamic adjustment, the lifespan of the V-belt can be doubled, reducing the number of times the crusher stops due to material accumulation to zero. If iron enters the crusher or the bearing malfunctions and jams, the crusher will also stop immediately to prevent the fault from escalating.

Claims

1. A method for feeding a crusher, characterized in that, Includes the following steps: (1) When the crusher is overloaded, monitor the real-time speed of the crusher drive shaft and motor output shaft, and calculate the threshold. (2) Adjust the feed rate according to the threshold. When the threshold is 0.8-1, maintain the original feed rate. When the threshold is 0.6-0.8, the feed rate decreases by 10-30%. When the threshold is 0.3-0.6, the feed rate decreases by 40-60%. When the threshold is less than 0.3, stop the machine immediately.

2. The crusher feeding method according to claim 1, characterized in that, In the aforementioned step (1), the threshold is calculated according to the following formula: Threshold = (Rdrive shaft * Dcrusher) / (Rmotor * Dmotor) In the formula, R_driveshaft is the speed of the crusher driveshaft, R_motor is the speed of the motor, D_crusher is the diameter of the crusher V-belt pulley, and D_motor is the speed of the motor V-belt pulley.

3. The crusher feeding method according to claim 1, characterized in that, In step (2), when the threshold is 0.6-0.8, the material supply decreases by 20%, and when the threshold is 0.3-0.6, the material supply decreases by 50%.