RU178347U1 - SHIP DIESEL TURBO COMPRESSOR BRACKET - Google Patents

Abstract

The utility model relates to constructions of brackets for mounting turbochargers to the upper - end part of the cylinder block of marine medium-speed diesel engines. The device consists of an upper horizontal shelf, front - inclined wall, rear - vertical wall, side vertical walls. The upper - horizontal shelf is made with six holes, four holes for the support legs and two holes on the elongated part of the turbocharger, the rear - the vertical wall on the left side is also made with an extension and at least three holes. The technical result consists in improving the design of the bracket, aimed at preventing breakage of the bolts of the bracket of the turbocharger and ensuring the reliability of the fastening of the system of the turbocharger - bracket - diesel unit. 5 ill.

Description

The utility model relates to the field of marine medium-speed diesel engines and relates to constructions of arms of turbocompressors for fastening to the upper - end part of the cylinder block.

The known design of the bracket of the turbocompressor of a medium-speed marine diesel engine (Minasyan MA, Medvedev VV “Reducing the vibration of diesel generators and ship structures due to damping with a mastic coating.” Shipbuilding No. 3, 2006, pp. 36-38, adopted prototype.In the beginning of 1990, on some refrigerated vessels there was increased vibration of diesel generators of the DG 5АL 25/30 brand, which required the development of measures to eliminate it.The amplitude of movement of the bracket of the VTR 250M turbocompressor exceeded the permissible norm of 0.3 mm in Ravilov Russian Maritime register. Thus, the amplitude value of vibration displacement in the vertical direction was 0-0,93 mm laterally 1-1.1 mm and 1 mm along the axis of the turbocharger.

For convenience of description, the design features of the known (standard) bracket in FIG. 1 presents its General view.

Known bracket consists of: 1 - the upper horizontal shelf with four holes for the support legs of the turbocharger; 2 - front - inclined wall; 3 - back - vertical wall with ten holes for cantilever bracket mounting using bolts to the end vertically transverse plane of the cylinder block of the diesel engine; 4, 5 - lateral vertical walls.

When the diesel engine is idle, ten bolts of fastening the bracket with the rear wall 3 to the vertical end - transverse plane of the cylinder block of the diesel engine act transversely - vertical static shear force and bending moment from the weight of the turbocharger. The weight of the VTR 250M turbocompressor is 360 kg, that is, the turbocompressor is quite massive.

During the operation of the diesel engine through the bracket, in addition to the weight, the inertia forces of centrifugal and translationally moving masses and tilting moment act on the indicated bolts, which also tend to cut the bolts along the interface plane of the bracket and the transverse end plane of the diesel unit. Considering also the resonance phenomena that occur during the operation of 5АL 25/30 diesel generators, in practice there have been cases of relaxation and breakage of the bolts of the brackets to the cylinder block.

Thus, a significant drawback of the known bracket is the imperfection of the design itself and the unreliability of its attachment to the diesel unit.

The technical result of the proposed utility model is to improve the design of the bracket, aimed at preventing breakage of the bolts of the bracket of the turbocharger to the diesel unit, i.e. ensuring the reliability of mounting the turbocharger - bracket - diesel unit.

The specified technical result is achieved by the fact that:

1. The upper horizontal shelf of the bracket of the turbocharger from the side of the rear vertical wall is made with elongation and at least two holes;

2. Rear - vertical wall on the left side is also made with elongation and at least a stirrup with holes.

An extension on the upper horizontal shelf supports the bracket on the horizontal plane of the cylinder block, thereby unloading the bolts securing the rear cover to the end of the cylinder block.

Holes on the elongated parts of the upper horizontal shelf and the rear vertical wall serve as additional fasteners.

Thus, due to the extensions of the horizontal shelf and the rear - vertical wall with corresponding holes, the reliability of fastening the turbocompressor - bracket - diesel unit system is achieved.

The essence of the technical solution - utility model is illustrated by the drawings shown in FIG. 1-5, where are shown:

in FIG. 1 general view of the well-known standard arm of a turbocharger;

in FIG. 2 and 3 - general view of the new bracket;

in FIG. 4 - layout of the diesel generator DG 5AL 25/30 on a refrigerator vessel with the designation of the main elements and the location of the turbocharger VTR 250M with bracket;

in FIG. 5 is a diagram of the mounting bracket on top and from the end of the cylinder block.

In FIG. 1-5 are indicated:

1 - upper - horizontal shelf (Figs. 1-3, 5);

2 - front - inclined wall (Fig. 1-3);

3 - back - vertical wall (Fig. 1-3);

4, 5 - side - vertical rack (Fig. 1-3);

6-9 - holes for mounting the turbocharger to the shelf 1 (Fig. 3);

10-22 - holes on the back - vertical wall (Fig. 3, 5);

23, 24 - holes on the elongated part A of the upper horizontal shelf 1 (Fig. 3);

25 - diesel 5AL 25/30 (Fig. 4);

26 - end face of the diesel block (Fig. 4);

27 - turbocharger VTR 250M (Fig. 4);

28 - turbocharger bracket (Fig. 4);

29 - generator (Fig. 4);

30 - submotor frame of a diesel generator (Fig. 4);

31 - ship's foundation (Fig. 4);

32 - the second bottom of the vessel (Fig. 4);

33-36 - fasteners (Fig. 4);

A - the elongated part of the upper horizontal shelf 1 (Fig. 2, 3, 5);

In - the elongated part of the rear - vertical shelf 3.

The proposed bracket consists of: 1 - the upper horizontal shelf 1, the front - the inclined wall 2, the back - the vertical wall 3, the side vertical walls 4, 5 (Fig. 2, 3). The upper horizontal shelf (Fig. 2, 3) is made with six holes, four holes 6, 7, 8, 9 for the support legs and two holes 23, 24 on the elongated part A of the turbocharger (Fig. 3).

When the diesel engine runs through the bracket 28 (Fig. 4), in addition to the mass of the turbocharger 360 kg, the inertia forces of centrifugal and translational moving masses and tilting moment act on the bolts installed in holes 10-22 (Fig. 4), which also tend to cut the indicated bolts along the plane of separation of the wall 3 of the bracket and the end transverse plane of the diesel block. Moreover, the supporting part A (Fig. 3, 5) of the upper horizontal shelf 1 is important in ensuring the reliability of the bolts. Due to this, the tension of the bolts installed in the holes 10-22 (Fig. 3) is reduced.

Thus, the proposed improved design of the bracket of the turbocompressor of a marine medium-speed diesel engine ensures the prevention of breakage of the mounting bolts, and therefore, the unreliability of its attachment to the diesel unit.

This is confirmed by the practice of operating the new design of the proposed bracket on ships.

Claims (1)

A turbocharger bracket for a marine diesel engine containing an upper horizontal shelf with holes for the support legs of a turbocharger, a front one with an inclined wall, a rear one with a vertical wall with holes for cantilever bracket mounting using bolts to the end vertical transverse plane of the cylinder block of the diesel engine, side vertical walls, characterized in that the upper horizontal shelf of the bracket from the side of the rear vertical wall is made with elongation and at least two holes, the rear is vertically the second wall on the left side of the bracket is also made with elongation and at least three holes.

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