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(1) because of the steel cable tension on the ship with wave motion caused by the mutation, after pulling drum attenuation, cable tension value is very small and stable, will not affect the cable row storage drum;
(2) the smaller the winding tension cable in the storage drum, can avoid the high tension cable long elastic deformation to plastic deformation and permanent, thereby prolonging the service life of the wire;
(3) winding cable not low tension in the storage drum on each other because of wear backlog and superposition caused by cable, and the force on the drum body and the flange is also very small.
2.1Storage winch
Storage winch comprises a reel, fairleader, composition and the guide wheel. Fairleader including cable screw, spooling wheels and a travel switch. Structure and functions are as follows:
(1) drum
The main function of reel to accommodate the umbilical cable, and provide initial tension for the traction winch. The reel structure requirements are as follows: ① reel diameter shall be not less than the minimum radius of curvature (minimum radius of umbilical cable works); II drum must be large enough to accommodate all of the cable; the cable can be arranged in order to neat, must control the winding layer, generally not more than 6 layers; the production of spiral groove on the drum, the cable arrangement stress can improve the roller in the slot for cable, even in the roller.
(2) fairleader
Spooling mechanism comprises a guide rod, screw driving, spooling wheels, travel switch. The guide rod and the drive screw is mounted parallel to the drum axis, and fixed with the drum position. Spooling wheel is mounted on the guide bar, move in the drum length range is driven by the screw, the minimum radius of curvature spooling wheel radius of not less than the umbilical cable. Winch for storage, storage winch rotates a circle, spooling wheels to move a lead of the distance, ensure the umbilical cable and cable reel in the direction perpendicular to the axis of the beginning and the reel, so that the cable are closely arranged in a drum. The travel switch is installed in the screw rod ends, when the retractable to each layer of the last lap, spooling wheels touch switch, control screw rotation reversing, storage winch into the next layer of the umbilical cable.
(3) a guide wheel源'自^751;文,论`文'网]www.751com.cn
The guide wheel is the role of the umbilical cable from the cable guide to store the traction winch wheel winch, the number and the position should be based on umbilical cable transition needs to be determined. The guide wheel radius shall not be less than the minimum curvature radius of the umbilical cable
2.2The traction winch
The traction winch winch structure composed of two same, tandem composition, as shown in figure 1-2. The winch 1, left for the capstan winch 2, each with a plurality of annular cable trough (usually 6 can satisfy the demand of). Deep-sea research equipment and the umbilical cable winch, by 2 first horizontal cable trough into the cable, winch 2 first cable groove guide is not stressed, then entered the capstan winch 1 in 1, first cable slot winding 180 °, cable from the top into the (solid line) is a (dashed line), then in 2 180 ° winding winch, cable from the lower (dashed line) in the top (solid line), followed by winding the cable trough 2 winch, winch cable from 1 at the end of last line of cable trough level mooring winch, 1 the last cable groove guide not only stress. The friction winch cable trough, cable, the cable traction winch Zhang Liyuan less than a cable tension. This traction provide traction winch and umbilical cable of the deep investigation of the equipment and the main force.
pulling device
3 Analysis of hydraulic system of deep-sea sampling winch
Compared with mechanical transmission and electric drive transmission, hydraulic transmission has the same power of small volume work steady and rapid starting and stopping and reversing good performance of speed adjustment range is easy to achieve overload protection and control, convenient operation and other advantages, is widely used in large power equipment on deck, so the deep ocean survey winch with hydraulic transmission mode, system the main drive traction drum storage drum and rectangular spooling device adopts the hydraulic pump and hydraulic motor as the core, three hydraulic system at the completion of each transmission part of the work at the same time, also want to rotate speed and move speed cable guide wheel to adjust the storage drum, to keep the cable tension in a certain range the scope, the detailed analysis of each part