SU384737A1 - TWO-SPEED REDUCER FOR SHIP POWER - Google Patents

Description

one

The invention relates to the field of shipbuilding, in particular to gearboxes, ship propulsion systems.

Two-speed gearboxes of the ship's power plant are known, containing a direct transmission to the screw of the first speed with concentrically located gears, a search of the gears of the second speed with a gear unit and a drive of the speed controller.

The purpose of the invention is to maintain the speed of the ship and the transfer of power without loss when switching gear from one speed to another.

In the proposed reducer, hydraulic clutches are installed between concentrically located gears of the first speed and blocks of gears of the second speed, the pump parts of which are integral with the gears of the first speed concentrically arranged, and the driven parts of the hydraulic clutches are made in one piece This means that the fluid couplings are activated only when the propeller shaft speeds are switched.

In order to ensure the constant speed of the driven part, the speed controller can be connected to the driven part of the gearbox.

FIG. 1 shows schematically the described two-speed gearbox of a ship power plant in longitudinal eze; on f; 2 - the position of the two-speed gearbox at the second speed.

Spring 7, associated with the crankshaft of the power unit, rotates the central gear 2, which in turn transmits rotation to concentric gears 3 (one or several), which are in one piece with the pump parts of the hydraulic couplings. On the spring part of the Central gear mounted on the leading double-sided ratchet 4, which through the friction clutch 5 is connected to the driven ratchet 6 or 7.

A gear wheel 8, connected with one or several block-gears 9 of the driven part of hydraulic clutch W, is mounted on the external splines of the driven ratchet 6. The same ratchet transmits the rotation to the shaft // of the selection wheel.

The first speed of the propeller is made by direct transmission from the crankshaft of the power unit to the spring /, through the spring part of the central gear 2, the friction clutch 5, the driving ratchet 4. And the driven axle 6 on the power take-off shaft 11.

When switching from the first speed to the second handle 12, it is set to pos. // (second speed), then the oil enters through the main line 13 into the second speed cavity of the servomotor 14. At this, cam U5 rotates, opening the air valve 16, and the compressed air from the cylinder flows through the control valve 17 and the pilot check valve 18 into the pneumatic accumulator bacho, towards 19. At the same time, air flows through channel 20 into cylinder 21 to switch ratchet 4 from first speed to second, i.e., leading ratchet 4 moves from slave x Rapov 6 first speed on the driven ratchet 7 second speed. The central gear 22 enters into operation. Connected by the driven gear 23 of the second speed is block plesterlen 9, which, due to the increased gear ratio, accelerates through gear 6 the rotation of the power take-off, which corresponds to the second gearbox speed.

Simultaneously with the air supply for switching the snores, ik 4, oil is pumped through the channel 24 through the channel 24 to the pump part of the hydraulic clutch 25. As a result of filling the hydraulic clutch with oil during the switching speed, they take a torque, thus ensuring smooth switching them from first to second speed. In this case, the feedback lever shifts the cam 15 to the left, closing the air valve 16. The ratchet 4 moves to the right, resting against the centrifugal fuse 26 (position /), which prevents the ratchet from engaging before synchronizing. During the movement of the ratchet 4 from the first speed to the second growl, the feedback roller will move the cam roller 1/5 to the left, the valve 16 will fall and the air supply will stop. As a result, the oil from the hydraulic couplings will flow out, the ratchet turns 4 and 7 will begin to level off and at the time of synchronization the centrifugal fuse 26. occupying the position / will move to the position // and the driven ratchet 7 will engage with the ratchet 4.

Switching from the second speed to the first one takes place in the reverse order, i.e., by supplying air through the opened valve 27 and channel 28 to the cylinder 29 to switch the driving ratchet 4 from the driven ratchet 7 to the driven ratchet 6 of the first speed.

The speed controller 30 of the power unit JJ is driven from the driven part of the gearbox. This ensures that the number of revolutions of the driven part of the gearbox and the speed of the ships at the time of switching gear speeds.

At idle and reverse, the power unit of the snoring clutch 31, moving to the left, disconnects the drive of the regulator from the gearbox and connects it to the gear 32, driven from the driven part of the engine.

Subject invention

Claims (2)

1. A two-speed gearbox of the ship’s rear system containing a direct gear to the first-speed propeller with concentrically located gears, a second-speed gearbox with a block of gears and a speed regulator drive, characterized in that in order to maintain the ship’s speed and transmit without losses when shifting gears from one speed to another, gears of the first speed and gears of the second speed gears are installed on the hydraulic clutches, the pump parts of which are made in one piece with the gears are not rare These are the first speeds, and the driven parts of the hydraulic couplings are made in one piece with the blocks of gears to search for the second speed so that the hydraulic couplings are activated only when switching the speeds of the propeller shaft. 2. The gear unit according to claim 1, characterized in that, in order to ensure the constant speed of the driven part, the speed control is connected to the driven part of the gearbox.