RU2292288C2 - Ship's reversing gear - Google Patents

Abstract

FIELD: water transport; reversing of ship motion by means of two water-jet propellers.

SUBSTANCE: proposed reversing gear has reversing dampers with drives for their turn. Damper turn drive of both propellers is operated from one three-position hydraulic cylinder provided with hydraulic control cock which are connected to oil system of main engines and are located in engine room. Reversing dampers of both propellers are connected with hydraulic cylinder and are interconnected together by means of transmission consisting of rods and levers.

EFFECT: enhanced reliability of ship reverse control.

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Description

The invention relates to the field of water transport and is intended to change the direction (reverse) of the course of the vessel, mainly with water-jet propulsion.

The known reversing device of the vessel (RU No. 2198112 dated 02/10/2003, IPC B 63 H 11/11), adopted as a prototype, comprises a reversing damper, a shaft and its rotation levers, a drive in the form of an electric motor with a gear-screw mechanism interacting with swing lever of the reversing deflector. The electric drive contains a reverse control switch, a contactor, limit switches, relays and other elements of electrical control.

As shown by operating experience, the electrical reverse control system in the form of limit switches and relays does not provide sufficient reliability due to strong vibration in the stern of the vessel. Failures in the alarm operation periodically occur.

A reversing device is known (SU 1586957 from 08.23.1990, IPC B 63 H 11/11) in the form of a hydraulic cylinder pivotally connected to the flap behind the stern of the vessel from the outside.

The design is constantly in a bubbling stream of water. The service life (resource) of this hydraulic cylinder and pipelines for supplying the working fluid is limited. The drive provides only two fixed positions and works from an autonomous hydraulic system, quite complex in composition. Each mover has its own reversing-steering device with drives.

The aim of the present invention is to remedy these drawbacks.

This goal is achieved by the fact that in the present invention, the reverse of two propulsors is carried out using one three-position hydraulic cylinder with a control valve connected to the oil system of the main engines and located inside the engine compartment. At the same time, the reversing shutters of both propulsors are connected to the hydraulic cylinder and to each other by transmission from rods and pivoting levers, which ensure the synchronization of the 3 positions of the shutters of both propulsors in forward, reverse and in the absence of vessel motion, during drift.

The essence of the invention lies in the fact that to simplify and improve the reliability of the design, the drive for turning the reversing flaps of both engines is made from one three-position hydraulic cylinder with a control valve connected to the oil system of the main engine and located in the engine compartment of the vessel. The hydraulic cylinder is connected to the dampers by means of rods and pivoting levers.

The technical result of the invention is to ensure the reliability of reverse control of the vessel. This is achieved by one three-position hydraulic cylinder. There are no unreliable elements such as electrical limit switches and relays. Overload protection in the end positions of the actuator is provided by a safety valve that switches the operating pressure to drain when the damper reaches any of the three fixed positions. The working fluid is oil from the oil system of the main engine of the vessel. No special hydraulic system is required.

The invention is shown in the drawings:

Figure 1 - reversing device, side view;

Figure 2 - reversible device, a view of the stern indoors;

Figure 3 - reversing device, top view;

Figure 4 - diagram of the work.

Figure 1-3 shows the reversing device in the reverse position (the flap is lowered). The reversing device consists of a flap 3 located behind the nozzle 1 of the water cannon 2, mounted on the pins 4, an ear 5 on the flap, a thrust 6, a lever 7 on the outer end of the shaft 8, a lever 9 on the inner end of the shaft 8, a hydraulic cylinder 10. The shaft 8 is installed inside the sleeve 11 in the stern wall. The hydraulic cylinder 10 is three-position, has a control valve (not shown), consists of an insert 12, to which sleeves 13 and 14 with rods 15 and 16 are attached on both sides.

Rods 15 and 16 may have different strokes, as the neutral (stop) position of the reversing deflector may not be in the middle of its rotation angle. On the insert 12 and sleeves 13 and 14 there are fittings for connecting to the hydraulic system (not shown), for supplying and removing oil from the control valve. The hydraulic cylinder is installed so that one rod 15 is pivotally fixed to the foundation, and the other rod 16 is attached to the lever 9, also pivotally.

The hydraulic cylinder has 3 positions:

- both rods extended (longest),

- both rods retracted (shortest length),

- one stem extended (intermediate length).

The reverse mechanisms of the right and left sides are kinematically connected with each other by means of the rotary levers 17, 18 and the thrust 19, 20.

The device operates as follows.

When the vessel is moving forward, the shutter 3 is raised (shown by the strokes in FIG. 1) and does not create an obstacle to the jet of water being thrown off by a screw or water cannon. Reactive force R moves the ship forward. The rods of the hydraulic cylinder while fully extended both (figa).

To reverse, the control valve is placed by the driver in the "reverse" position. The working fluid (oil) enters the hydraulic cylinder, the rods 15 and 16 are retracted, the lever 9 rotates counterclockwise, and the lever 7 also. The damper goes down into the water stream (figb). The flow of water changes direction, there is a reactive force R, braking the vessel, and then creating a reverse.

To install the shutter in an intermediate position, for example, with the purpose of locking the vessel R = 0 (drift), the working fluid (oil) is supplied only to one working cavity, one rod is extended, the other remains retracted (figv).

Thus, the direction of movement of the vessel depends on the position of the rods of the hydraulic cylinder. The vessel is controlled on course using steering dampers from a separate drive.

Claims (1)

The reversing device of the vessel, mainly with water-jet propulsion devices, containing reversing dampers with a drive for turning them, characterized in that the drive for turning the reversing dampers of both engines is made from one three-position hydraulic cylinder with a control valve connected to the oil system of the main engines and located in the engine compartment of the vessel, this reversing flaps of both propulsors are connected to the hydraulic cylinder and to each other by a transmission, also located inside the engine compartment and consisting of traction and growling s ensuring synchronicity provisions dampers both propellers.

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