SU1720929A1 - Shipъs power plant - Google Patents

Abstract

The invention relates to shipbuilding, in particular to reversing devices for ship power plants. The purpose of the invention is to reduce the mass-size characteristics and simplify the installation design. The installation contains a non-reversible motor 1, the shaft of which is connected to the input shaft of the gearbox. Gear 2 is attached to the input shaft of the gearbox, which is engaged with gears 3 and 4 mounted coaxially. Wheel 3 is made with external gearing, wheel 4 - with internal gearing. The shaft 3 of the wheel is placed coaxially inside the hollow shaft of the wheel 4. Leading coupling halves 5 and 6 are fixed at the ends of these shafts. The driven coupling half 7, having the possibility of axial movement, is fixed to the end of the propeller shaft 8. Depending on the specified direction of rotation of the propeller shaft, driven half coupling 7 is inserted in connection with one of the leading half couplings 5 or 6 rotating in different directions. In the middle position of the half coupling 7 — without connecting with the coupling half 5 or 6 — the propeller shaft does not rotate (from the engine), and the engine 1 operates in a hollow a hundred move. 1 il. w Ё

Description

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FIELD OF THE INVENTION The invention relates to shipbuilding, in particular, to ship power plants (EPS).

In the SPP with non-reversible engines, the propeller shaft reversal can be performed using special gears - reversible gearboxes (PP).

Various designs of PP with parasitic gears (wheels) and disconnecting couplings are known.

As can be seen from the diagrams, the introduction of even one parasitic element into the design of the gearbox involves one or more additional gear elements and shafts. This significantly complicates the design and degrades the weight and size characteristics of the SPP.

The closest technical solution to the invention is an EPP comprising an irreversible main engine, a propeller shaft and a PP. In the RD of this SPP gear, attached to the input shaft, hooked to the front wheel and reverse wheel. Since both wheels have the same direction of rotation, two more parasitic wheels as well as two disconnecting clutches are provided to provide reverse travel.

The design of the PP is complex, as the single-stage gearbox in reverse turns into a two-stage one. The second stage - two parasitic wheels - increases the length and mass of the RR and the SPP as a whole.

The purpose of the invention is to reduce the mass-size characteristics and simplify the design of the SPP.

For this purpose, the proposed SPP contains a non-reversible main engine, a propeller shaft and a reversing gearbox. In the latter, an input shaft with gear and front and reverse wheels are provided. Both wheels are meshed with gear, one of the wheels is engaged with external gearing, and the second with internal gearing. Both wheels are arranged coaxially, with the internal gear wheel shaft being hollow, and the external wheel wheel shaft located inside said hollow shaft. The installation has two disconnecting couplings, the leading coupling halves of which are fixed at the ends of the shaft of the gearbox wheels, and the driven half coupling at the end of the propeller shaft.

The drawing is a diagram of the proposed EMS.

The installation contains a non-reversible main engine 1, the shaft of which is attached to the input shaft of the gearbox. Gear 2 is fixed on the gearbox input shaft. Engaged with gear wheels 3 and 4. Wheel 3 is made with external gearing, and wheel 4 is with internal gearing. Shafts 3

and 4 are placed coaxially, while the wheel shaft 4 is hollow, and the shaft 3 is placed inside the hollow shaft of the wheel 4. At the ends of both shafts, there are fixed coupling halves 5 and 6 of the uncoupling couplings at the end of the propeller shaft

8 - driven half coupling, combined in this case in one node 7.

The installation works as follows.

Main engine 1, and hence gear 2, rotate in the same direction in forward and reverse modes. In this case, the wheel 4 rotates in the same direction, and the wheel 3 - in the opposite direction. The axial shafts of the wheels 3 and 4 with the leading coupling halves 5 and 6 rotate in opposite directions. Depending on the specified direction of rotation of the propeller shaft 8 of the coupling half 7 entered into engagement with half coupling 5 or 6.

By making the wheels 3 and 4 with different (internal and external) gears, the rotation of the leading coupling halves 5 and 6 in different directions is ensured without the use of parasitic gear elements. Therefore, the number of gear elements in the PP of the proposed SPP is less than that of the known, the PP is one-step in both forward and reverse. As a result, the designs of the proposed PP and EPP are generally simpler, and the length and mass are smaller than those of a known installation.

Claims (1)

Claims of the Invention Ship power plant comprising an irreversible main engine kinematically associated with a propeller shaft, a reversing gearbox including an input shaft with a gear and a forward and reverse wheel, and two disconnecting couplings with drive and driven coupling halves, characterized in that , in order to reduce weight and size characteristics and simplify installation design, one of the wheels of the mentioned gearbox made with external gearing, and the other wheel - with internal gearing, both wheels are placed coaxially and meshed with gear, the wheel shaft with internal gearing is hollow, and the wheel shaft with The external gearing is placed inside the aforementioned hollow shaft, the driving half-couplings are fixed at the ends of the wheel shafts, and the driven half-couplings - at the end of the propeller shaft.