【正文】 e tower top Zhuangruo hammer, shaft, such as hammer handle, no spire, it is also known as flat head style. Flatstyle of making structure simpler and more conducive to the force, to reduce weight and simplify construction and so on. Most used car luffing jib equilateral triangle crosssection. Tower structure, also known as the tower is the main body of the tower crane structure. Now adopt a square crosssection of tower crane, application of a broader crosssection dimensions are: , , , 。 * Pin in place and locked, when you mention piston rod, in the set of planes in the formation of the introduction of space。 anemometer 。 right frame structure, attachment points for appropriate column in close proximity to the roots of cloth。s major demand markets. According to preliminary statistics, China to obtain production licenses tower crane production plant more than 400, but 80 years less than 100. 。 60 years designed and manufactured 25tm, 40tm, 60tm several models, and many more moving the main arm。 security audio signal. Limit switches according to the functions are: hook travel limit switch, rotary limit switches, trolley travel limit switch, carts travel limit switch. (G), the provisions of the tower crane antitipping Nonoverloading operation。 * Standard section brought the introduction of car ferry。 the latter were large in size to the stability of the windward big negative, but the simple economy, it is generally use this. The usual practice is to balance the emphasis on 黃河科技學院畢業(yè)論文設計 predivided into 2 ~ 3 kinds of specifications, width, thickness of the same, but the height should be adjusted to match the use of different arm lengths. (B), the tower crane spare parts Each tower crane must be used in many kinds of lifting parts, of which the largest number of technical requirements are strict and plicated rope specifications. Tower crane wire rope used in accordance with different functions are: lifting wire rope, rope luffing, jib ropes, balance the arm ropes, trolleys and other traction rope. Steel wire rope is characterized by: the entire root, high strength, but also the whole root sections, the size of the same intensity, light weight, able to withstand shock loads, flexible enough to winding into a disk, can be balanced at high speed movement, and no noise, wear and tear After the skin will produce a number of glitches, easy to detect and facilitate the timely disposal. Steel wire rope is usually a Unit diameter ~ thin twisted wire strand, and then twisted into rope by the Unit. Tower crane is used in interactive twist, is characterized by loose and difficult to reverse. On the strand crosssectional shapes, the highrise building construction with the tower crane to adopt the multistrand rope is not reversed, the most appropriate, such a wire rope consists of two layers posed of the same strand, two strand twisting in the opposite direction, using the principle of rotating torque balance twist crafted by 黃河科技學院畢業(yè)論文設計 force does not occur when the free end of the reverse. Hoisting Tower Crane luffing rope and wire rope safety factor usually taken to be 5 ~ 6, car towing rope, and boom Cord of the safety factor of 3, tower crane lifts Lifting Sheng An allcoefficient of not less than 10. Steel wire rope safety factor is indispensable for security reserve factor, by virtue of this security must not be arbitrarily raised the rope reserves face the maximum allowable safe load. Because of the importance of steel wire rope, we must strengthen the prehensive inspection of wire rope on a regular basis, stored in dry closed surface, there are wooden floors or asphalt concrete warehouse floor to prevent corrosion, loading and unloading not to damage the surface of the pile when placed erect. Systematic lubrication of the rope can increase the service life. Luffing jib tower crane trolley is the level of essential parts. Change car set by the frame structure, steel wire rope, pulleys, line wheels, guide wheels, steel wire rope supporting the wheel, steel wire rope antiroll off, car towing rope tensioning device and the broken rope posed of insurance, etc.. For the talent level of boom (more than 50m in length) in amplitude with the car at the side of an overhaul hanging baskets may contain members of the maintenance and repair of all maintenance points to the repair and maintenance. Job finished, the roots boom car driven across the border to make baskets with luffing car separated from the structure fixed to the boom supports the dedicated office. 黃河科技學院畢業(yè)論文設計 Other parts are wheel