Mine upgrade original parameters
(1) Self-weight of the cage (including rope loop, etc.) 3960kg load 3300kg Among them: mine car weight 600kg ore weight 1800kg occupant (12 people) 900kg.
(2) Lifting wire rope specification 18@7-34-170 steel wire total sectional area 478.72mm2 suspension length 300m elastic modulus 14.3N/cm.
(1) The cage can be accurately received when it is on the receiving device with the maximum rated load and normal crawling speed, ensuring smooth and smooth entry and exit of the mine car.
(2) When the cage is in the light tank (empty tank by one person), it can be buffered when it falls on the receiving device at the over-discharge speed. According to the requirements of Execution Note 6 of 5 Coal Mine Improvement Design Codes 6 and 5, the buffer deceleration should be greater than 1g when lifting materials (heavy tank), and the deceleration should be less than 5g when light tanks (by 1 person). The design parameters of the bottom hole cage of the auxiliary shaft of the city coal mine are as follows: the claw length is 270mm; the cage claw is 60mm; the side middle distance is 170mm; the spring total stiffness is EK1197N/mm; the spring preload is 90kN; the claw buffer limit stroke is yj169.7mm The bearing capacity is calculated by the following formula: Fc=170cosA(9163+1702KsinA)2102+y2 is substituted into the actual parameters: the maximum bearing force is 117kN; the force point is 110mm; the average braking force is 107kN; the maximum deceleration of the empty tank is 3.06g; The speed is 2.8g. From V2=2as=2ay, the minimum critical speed of the tank cans is over the claws by 3.05m/s. The average deceleration of the heavy tank is a=1.508g, and the minimum critical speed through the claws is 2.23m. The /s.24 test was conducted to simulate the worst case conditions in the empty tank at the maximum deceleration.
experiment method
(1) Remove the 2m/s speed protection close to the wellhead.
(2) Move the upper wellhead over-winding switch to the tank cage and check its reliability.
(3) Verify the speed measuring generator, the speed measuring voltage is 215V at 6.7m/s.
(4) Set the relative position of the hoist drum when setting the claws of the bottom hole cage, and mark them so that the driver can brake accurately.
(5) A live goat (weight about 18 kg) was taken into the tank for animal testing.
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