SU979200A1 - Ship winch of follow-up rope - Google Patents

Description

(54) SHIP WINCH OF FOLLOWING CHANNEL

The invention relates to lifting devices, namely to ship legs / tails of the following rope.

The closest technical solution to the described invention is a ship winch of a trailing rope, comprising a cable drum connected to the engine through a working hydraulic coupling and a gearbox, and through an overrunning clutch to a supporting element 13.

The disadvantage of this winch is the rigid connection of the drum with the ratchet, working abruptly, with jolts, which leads to high dynamic loads in the rope and reduces the reliability of the winch.

The aim of the invention is to increase the reliability of the winch by ensuring the rope tension is constant in the wave tracking mode.

For this, the winch is equipped with an accelerating gearbox and a brake clutch, the pumping wheel of which is connected to the drum via an accelerating gearbox, and the turbine wheel with an overrunning clutch.

FIG. 1 schematically shows a ship's winch; in fig. 2 - characteristics (dependence of the braking moment on the speed) of the working

and brake fluid coupling, as well as their joint characteristic.

The ship's winch contains a non-reversible engine 1 through a coupling 2, a matching reducer 3 and a working hydraulic coupling 4 cable drum 5. The drum 5 through an accelerating reduction gear 6 is connected to the pump wheel 7 by a brake hydraulic coupling 8, the turbine wheel 9 of which through an overrunning coupling 10 is associated with a fixed support member 11.

15

The following ship winch works as follows.

After securing the free end of the rope (cable guide) (not shown) on the lifted

20 objects (a small vessel or a lighter) include the drive motor 1, the workings are always on the choice of the rope. In this case, the slack of the rope is selected until the engine rpm reaches the nominal value, after which the winch starts the process of automatic tracking of the wave consisting of two phases; choosing and

30 pickling rope (cable guide).

During the first phase of the workflow, when the object being lifted moves up the wave, the torque from the engine 1 is transmitted through the matching gearbox 3 to the pumping wheel of the working hydraulic clutch 4 and the rope is wound onto the ba, raban 5. In this case the gear is turned on. the clutch 10, and the brake fluid clutch 8, the pump 7 and the turbine 9 whose wheels rotate as a single whole, does not have a braking effect,

When the relative speed of movement on the wave of the object being lifted is zero (the speed changes its sign on the crest or trough of the wave), the maximum effect is exerted by inertial loads.

The tension of the rope at these points is ensured by the working hydraulic clutch 4, and the deviation of the tension of the rope from the nominal force will be determined by the selection of the joint characteristic of the electric motor 1 and the working hydraulic clutch 4, as well as the selection of the dynamic parameters of the driving and driven members of the structure. The selection is carried out in such a way that the deviation is no more than 20%.

With the relative movement of the lifted object down the wave (second phase of the workflow), the rope is etched by external forces, and in this case the direction of rotation of the shaft of the engine 1 and the drum 5 does not coincide. The tension of the rope is ensured due to the fact that the working fluid coupling 4 operates in a counter-rotating mode (the pumping and turbine wheels rotate in opposite directions), and the brake hydraulic coupling 8 - in the stop mode (the pumping wheel 7 is driven by the accelerator gearbox 6). 5, and the turbine wheel 9 is blocked by the overrunning clutch 10). Accelerating gear 6 increases the number of revolutions of the pump wheel 7 of the brake fluid coupling 8, which leads to an increase in the braking torque.

Thus, the tension of the rope (cable-conductor) in the automatic tracking of the wave is ensured in the winding mode (cable selection) due to the work of the hydraulic coupling 4, on the etching cutting unit due to the joint operation of the brake 8 and the hydraulic coupling 4.

Moreover, the connection to the operation of the brake fluid clutch 8 with stopped B1

 The turugin wheel 9 provides compensation for reducing the torque of the working hydraulic clutch with an increase in the number of revolutions of the drum, i.e. the combined characteristic of the working and brake hydraulic clutches in the braking mode provides a constant (without differences) tension force of the rope.

FIG. 2 shows the characteristics of the braking mode (dependence of the braking torque of RTR on the number of revolutions M f (wgcjp) of the working hydraulic coupling 4 — curve 12, brake hydraulic coupling — curve 13, as well as their combined characteristic — curve 14,

Curve 13 corresponds to the characteristic of a known winch (prototype) on the braking mode. It is distinguished by a large drop in braking torque with an increase in the number of revolutions.

FIG. In Figure 2, it can be seen that the joint characteristic of the working and brake fluid couplings of the proposed winch (curve 14) provides 5 constant (without sharp drops) tension force of the rope.

Thus, the invented winch without a special control system operates in the automatic mode of tracking the wave, which will reduce the number of serviced personnel and speed up the loading and unloading operations. And besides, it does not allow sharp fluctuations of the rope, reducing the risk of its rupture, thereby providing increased reliability of the winch.

Claims (1)

1. USSR author's certificate No. 282637, CL. B 66 D 1/26, 1967 (prototype) about fJVfap FIG. g