Belt sintering machine trolley arching phenomenon appeared reasons and the harm produced
Time：
2022-07-11
来源：
1. Reason
When the trolley enters the tail of the sintering machine, it will start to enter the swing after the centre of the star wheel, in the process of catching up with the front trolley, the trolley will be pushed forward due to the force of the star wheel gear plate, the rear wheel of the trolley's ferrule will be in contact with the front working surface of the gear plate, and the forward force will be generated, but this thrust will have an upward force in the contact surface, in the process of generating the force, if the torque is too big over the trolley's self-weight, the trolley will be lifted upward under the action of this force, and the front trolley will still continue to rotate, pushing the following trolley forward. In the process of generating the partial force, if the moment is too large to exceed the weight of the trolley, the trolley will be lifted upwards under the action of this partial force, while the star wheel gear plate will continue to rotate and push the following trolley forward, and the front trolley will be crowded out by the rear trolley due to the cassette wheel leaving the gear plate, so it cannot be landed back on the track. Due to the arching phenomenon of each trolley, the trolley shoulder will appear on the return track.
2. Influencing factors of split force
2.1 After the tail end of the trolley is levelled, the force on the rear wheel will be reduced due to the change of the contact area between the front part of the tooth plate and the rear wheel of the trolley.
2.2 When the chuck wheel of the trolley is caught by the star wheel gear plate in the upper track of the tail, the thrust FT generated by the star wheel in the lower track can be reduced by increasing the resistance of the star wheel, so that the upward separation Ff acting on the chuck wheel can be reduced.
2.3 The star wheel gear plate will be due to the uneven force at the end of the sintering machine, the phenomenon of trolley deflection, such deflection will increase the length of the trolley combination in the lower track, and the increase in the length will increase the trolley combination of the internal upward force, which makes the friction force increase.
2.4 The friction F of the lower track will be affected by the length of the combination of the trolley, and the tail of the machine loser in the counterweight on the appropriate or not and flexible or not straight will directly affect the combination of the length of the trolley.
3、Harm
3.1 Damage the bearing. Trolley arch phenomenon, the operation of the entire equipment will not stop, therefore, the trolley will continue to run to the head of the sintering machine, due to the trolley's self-weight and equipment head of the role of the star wheel, in the run to the head of the head of the sudden fall, due to the impact and the force generated by the bearings is very easy to cause damage to the bearings, and serious accidents will result in the impact of the operation of the equipment. In addition, the end face of the trolley will also wear out under the impact, thus accelerating the aging of the equipment and increasing the consumption of spare parts.
3.2 Reducing the production efficiency of the sintering machine. Due to the arching phenomenon, the sintering machine will have air leakage, and in the whole production of sinter mine, about 70% of the energy is consumed in the fan, and the larger the air leakage, the higher the consumption of the fan, i.e., the arching phenomenon will increase the cost of production and affect the output.
3.3 Causing safety hazards. Due to the arching phenomenon, the combined length of the trolley on the upper track and lower track will be different, and thus the equipment will bear a large upward force, and the bearing capacity of the steel structure is limited, and if it exceeds the limit, there will be a potential safety hazard.
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