Apron feeder for sale is widely used in the crushing and grading workshop of large concentrator, as a self-storage bin for continuous or uniform feed to the primary crusher, and can also be used as a short-distance transmission. For example, it is used to directly feed the ore into the large vehicle at the bottom of the mine chute, and is used to continuously and evenly feed and load the material from the raw material warehouse to each truck. The feeder reducer is a special reducer successfully designed by the Transmission Machinery Research Institute of North Heavy Industry Group with reference to the technology of Flanders Company in Germany.
It adopts a three-level direct-current reducer and a two-stage planetary reducer with two shells connected by bolts. Type apron feeder reducer for high-power heavy plate, there are four series: DT35(239000Nm,i=360~ 840), DT36(240000Nm,i=330~840), DT37(170000Nm,i=270610), DT38(80000m, i=270610), 2006, A company in China has developed and designed DT39(60000Nm,i=280~500) and DT40(30000Nm,i=280~440) medium-sized products, whose structural characteristics are as follows: The two retarders are made into one body, and the two-stage direct transmission plus two-stage planetary transmission is a four-stage structure with footing connection type, which reduces the weight and solves the oil leakage at the joint of the two shells. The main defects of the apron feeder reducer of the existing technology are: (1)DT35~38 apron feeder for sale five-level deceleration, DT39, 40 four-level deceleration, the transmission chain is too long: the structure will be complex, the cost will increase, the whole machine will be heavier and the axial size is large: (2) Due to the existing technology of the two-stage planet (BD reducer) failed to adopt heat dissipation measures, only rely on natural heat dissipation resulting in low thermal power, so that users have to increase one or two model number selection, many mechanical theory monographs are so stipulated, the result will inevitably increase the cost, the greater the power, the more the cost increases: For example, the rated model BD800 (5000kg, price 137,500 yuan, thermal power 204kW), two more models are now selected NBD1000(8100kg, price 230,000 yuan, thermal power 335kW), the result: the price increased by 90,000 yuan, the weight increased by 3000kg, and the thermal power only increased by 130kW.
Thus, the structure of the existing technology must also be improved to increase the thermal power. The thermal power is the maximum power that the closed speed reducer can transmit continuously under the condition of lubricating oil equilibrium temperature. The thermal power should be equal to or close to the actual working power. Thermal power refers to the input power when the oil temperature does not exceed the allowable temperature under natural cooling conditions. Thermal power is an important parameter for designing lubrication system and an important basis for selecting reducer. High oil temperature is a very important reason for the failure of the reducer, this is because: high oil temperature viscosity decline, oil film destruction, lubrication failure leading to gear gluing, pitting and abnormal wear: high oil temperature leads to abnormal wear of the gear, wear makes the oil temperature rise, such a vicious cycle, premature damage to the reducer. The maximum allowable temperature of the lubricating oil pool is about 70℃, which is based on three: wind power gearbox: the maximum temperature of the lubricating oil pool is 70℃ : The maximum expected oil temperature of the wind power growth gearbox 70℃ Domestic 1.25MW unit oil temperature monitoring system: When the gearbox lubricating oil temperature exceeds 75℃, the monitoring system sends an alarm signal.
