QTZ80 Tower Crane

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Summarize QTZ4208 tower crane is designed by JINAN JIHONG MACHINERY Co., LTD. It makes full use of the grouping technology, composite design technology and finite element analysis technology, which is the newest lifting transportation machinery in domestic and designed with the tower crane microcomputer platform as the tool. This machine is horizontal arm, truck derricking, and upper-circumgyrating hydraulic climbing tower crane. Maximum lifting capacity is 3t, Maximum lifting torque is 385 kN•m. The main features of this tower crane: (1) Performance parameters and technical indexes have reached the domestic and international advanced level. The maximum working range is 42 m, which increases the working space of the tower. (2) The shape is international popular form, beautiful and generous. (3) Working mode various, widely using range. It has two working ways, basic fixed and wall attachment. It is suitable for various construction objects. The independent hoisting height is 28 meters, the attached height is 120 meters (a=2) and 60 meters (a=4) (4) It has high speed, good performance, high efficiency and working stability. There are many single speed motor and winding speed reducer, which can achieve high speed and heavy load, the maximum speed can reach 65.14 m/min. Truck derricking mechanism in horizontal arm traction car horns, has a good performance in installation. By using winding motor rotation, planetary gear reducer and hydraulic coupling, it has high bearing capacity, smooth, reliable working capacity and good ability wind resistance. (5) Crane arm used rigid dual pull rods, which has good rigidity, small light weight, and small wind resistance, even strength and artistic appearance. (6) Various safety devices could ensure the machine work safe and reliable. (7) The hoisting box stands alone and side and has clear view. (8) It is convenient to use and easy to maintenance. The deadweight of the machine is 17.5t; the total installed capacity is 25.7 kW. This machine is always applied to large-scale construction of high-tower buildings, like the high-level hotel, the residential building, which is the ideal construction machinery to the building enterprise. 2. Technical characteristic 2.1 Hoisting performance table Rang(m) a=4(kg) a=2(kg) 3～11 3850 2000 12 3652 2000 13 3357 2000 14 3104 2000 15 2885 2000 16 2693 2000 17 2523 2000 18 2373 2000 19 2238 2000 20 2117 2000 20.97 2011 2000 21 2008 1997 22 1908 1899 23 1817 1809 24 1734 1727 25 1657 1652 26 1586 1582 27 1521 1518 28 1460 1458 29 1403 1402 30 1350 1350 31 1300 1301 32 1254 1256 33 1210 1213 34 1169 1172 35 1131 1134 36 1094 1098 37 1080 1084 38 1075 1080 39 1065 1075 40 1000 1000 41 900 900 42 800 800 2.2Technical feature Project Unit a=2 a=4 Rated load moment kN•m 315 Max. hoisting capacity T 2 3 Rated radius m 3~42 Hoisting height Freestanding m 30 Attaching 120 60 Exterior dimensions of full crane Underbed m 4.6×4.6 Height(Freestanding) 38.36 Distance between the head of counter-jib and swing center 43 Distance between the end of counter-jib and swing center 10.685 Net weight of full crane Structure weight (Freestanding) t 19.405 Counter weight 43.65 Total capacity of the motor kW 25.7 Allow working temperature ℃ -20~+40 Power supply parameter 50Hz ~380V±10% 2.3 The main technique parameters Mechanism loadability Hoisting mechanism JC 40% Slewing mechanism JC 40% Trolley winch JC 40% Hoisting Mechanism Motor Type YZTD225-4/8/24 Running speed r/min 1440 720 220 Power kW 15 15 4 Reducer Distance between center points mm 460 Transmission ratio i 12.5 Winch drum Diameter mm Φ273 Layers 层 5 Rope m 280 Running speed r/min 115 57 17 Brake Type YWZ-250/45-10 Braking force N 450 Wire rope Traction force N 10000 Specification 6×19-11-1770-Ⅰ甲镀右交 Hoisting speed m/min 53.3/26.0 26.4/13.2 15.7/16.9 Rated hoisting capacity T 1/2 2/4 2/4 Min. stabilized load-lowering speed m/min ≤7 Total weight T 1.2 Slewing mechanism Motor Type YZR132M2-6 Running speed r/min 908 Power kW 3.7 Reducer Type XJL-80 Transmission I 195 Output torque N•m 8000 Slewing bearing Type 011.40.1120 Gear Modulus m 10 Tooth counting z 13 Addendum coefficient x +0.5 Torque counverter Type YOX250A Slewing speed r/min 0-0.62 Hydraulic climbing mechanism Hydraulic pump Working pressure MPa 20 Power kW 4 Type of oil pump GB306 Climbing cylinder Rated pressure MPa 20 Diameter of cylinder mm Φ125 Diameter of rod mm Φ90 Stroke mm 1300 Installing distance mm 1700 Climbing speed m/min 0.4 Max. climbing force T 24.6 2.4 Hoisting Characteristic Diagram a=2 a=4 2.5 Power parameters: 2.5.1 Machine total power: 25.7 kW 2.5.2 Power supply voltage: 380V ± 10%, 2.5.3 Power frequency: frequency: 50Hz 3. General introduction of crane construction QTZ4208 self-erecting tower crane is comprised of base, metal structure, working mechanism, electrical control and safety protection device(Fig 1). The structure and characteristic introduction of every part are as follows:

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Jinan Jihong Machinery Co., Ltd.

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