RU134595U1 - TURBOCHARGER FOR PRESSURING THE INTERNAL COMBUSTION ENGINE - Google Patents

Abstract

A turbocharger for pressurizing an internal combustion engine, containing a bearing housing, in which a rotor shaft is installed on radial and thrust plain bearings, on the consoles of which a turbine wheel and a compressor wheel are fixed, each placed in its own housing, a diffuser, oil supply channels and a channel made in the bearing housing oil drainage, oil dispensing elements, characterized in that in the area of intersection with oil supply channels on the supporting working surfaces of the bearing housing oil dispensing elements are made in the form of a depression in the form of a paraboloid of revolution.

Description

The utility model relates to the field of mechanical engineering, namely, to the design of turbochargers used to pressurize internal combustion engines.

A known design of a turbocharger for boosting an internal combustion engine, comprising: a bearing housing in which a rotor shaft is mounted on two floating radial and one thrust sliding bearings, the consoles of which are rigidly fixed: a turbine wheel and a compressor wheel, each located in its own housing. The compressor housing is attached to the bearing housing with a snap ring, and the turbine housing is attached to the bearing housing, on the other hand, with threaded elements. The thrust bearing is fixed on the bearing housing by the liner and circlip (See RF patent No. 32534, F02B 37/00, publ. 09/20/2003, figure 2 turbocompressor, General view in section (prototype)).

The disadvantage of this design is the relatively low efficiency of the turbocharger for boosting the internal combustion engine.

The closest to the claimed technical solution in terms of essential features is a turbocharger for boosting an internal combustion engine, comprising a bearing housing in which a rotor shaft is mounted on floating radial and thrust sliding bearings, on the consoles of which are mounted a turbine wheel and a compressor wheel, each located in its own housing , diffuser installed in the compressor housing, oil supply channels made in the bearing housing, oil drain channel and oil dispensing ments (see. Russian patent №32534, F02B 37/00, publ. 20.09.2003).

The disadvantage of this technical solution is the relatively low efficiency of the turbocharger for boosting the internal combustion engine.

The task to be solved by the claimed technical solution is to increase the efficiency of a turbocharger for boosting an internal combustion engine.

The problem is solved due to the fact that in a turbocharger for boosting an internal combustion engine containing a bearing housing, in which a rotor shaft is mounted on floating radial and thrust sliding bearings, on the consoles of which are mounted a turbine wheel and a compressor wheel, each located in its own housing, a diffuser made in the bearing housing oil supply channels and a channel for oil drainage, in the zone of intersection with oil supply channels on the supporting working surfaces of the bearing housing oil dispensing elements in the form of a recess in the form of a paraboloid of revolution.

The efficiency of the turbocompressor for boosting the internal combustion engine was increased due to the implementation in the zone of intersection of the oil supply channels and the supporting working surfaces of the bearings of the turbocompressor for boosting the internal combustion engine of oil transfer elements in the form of a recess in the form of a rotation paraboloid. This made it possible to provide a sufficient amount of oil for lubrication and cooling of the bearing assembly of the turbocharger for boosting the internal combustion engine, while the shape of the recess made it possible to provide smoother parabolic edges of the oil transfer zone boundary, increase the working area of the oil wedge, reduce vibration and noise levels and significantly reduce the degree of mutual wear work surfaces.

As a result of a search conducted in patent and other scientific and technical literature, no analogue was found that matches the claimed technical solution for the entire set of essential features, therefore, the claimed technical solution meets the patentability condition of “novelty”.

The claimed technical solution is illustrated by the drawings:

Figure 1 - Turbocharger for boosting an internal combustion engine, a General view in section;

Figure 2 - Sectional view of the bearing housing;

Figure 3 - Local view of "F" in figure 2 in a scale of 2: 1;

Figure 4 - Section TT in figure 3.

A turbocharger for boosting an internal combustion engine (FIG. 1) consists of a compressor housing 1 and a turbine housing 2, mounted on a bearing housing 3 by means of bolts and trims, which makes it possible to install the housings in a wide range of angles to each other. A diffuser 4 is pressed into the compressor housing 1. The turbine housing 2 is made of two-way (pulsed) ductile iron. On the housing 3 of the bearings (FIG. 2), a cap 5 made of aluminum alloy is fixed with bolts and is both the cover of the housing 3 of the bearings and the cover of the housing 1 of the compressor. To reduce heat transfer between the housing 2 of the turbine and the housing 3 of the bearings mounted screen 6 of heat-resistant steel. An oil-saving screen 7 is installed in the bearing housing 3, which together with the sealing rings 8 serves to prevent oil leakage from the cavity of the bearing housing 3 into the flow parts of the compressor and turbine.

The rotor assembly consists of a shaft 9, on the consoles of which are fixed a turbine wheel 10 located in the turbine housing 2 and a compressor wheel 11 located in the compressor housing 1. The rotor shaft 9 is installed in a combined bearing assembly, which consists of a thrust bearing 12 and two radial bearings 13, which are floating rotating sleeves. Oil supply channels 14 and channel 15 for oil drainage are made in the bearing housing 3. In the zone of intersection of the oil-supplying channels 14 and the supporting working surfaces of the bearing housing 3, oil-dispensing elements 16 (Fig. 3 and Fig. 4) are made in the form of a recess in the form of a paraboloid of revolution.

A turbocharger for boosting an internal combustion engine operates as follows: the exhaust gases from the engine enter the turbine housing 2 and rotate the turbine wheel 10 and then through the shaft 9 - the compressor wheel 11, while the turbine with a dual-input housing 2 converts the energy of the exhaust gases into kinetic energy rotation of the shaft 9, which in the compressor turns into gas compression work. The shaft 9 rotates on two floating radial bearings 13 and has a limitation of displacement in the axial direction by a thrust bearing 12, to which oil from the engine lubrication system is supplied under pressure. Due to the oil dispensing element 16 in the form of a depression having the shape of a paraboloid of rotation, a stable oil wedge is created in the friction pair “bearing housing 3 - radial bearing 13” and a sufficient amount of oil is provided to lubricate and cool the bearing assembly of the turbocharger for boosting the internal combustion engine. The oil used in the bearing assembly is discharged back into the engine lubrication system via channel 15.

To form the oil transfer element, a standard cutting tool is used: a boron mill with a spherical working head, the contact of which at the intersection of the cylindrical surface of the oil supply channel with the supporting working surface of the bearing housing creates an oil transfer element in the form of a cavity in the form of a paraboloid of revolution.

The claimed technical solution provides increased efficiency of a turbocharger for boosting an internal combustion engine.

The inventive turbocharger for boosting an internal combustion engine meets the condition of industrial applicability and can be manufactured on standard equipment using previously developed technologies.

Claims (1)

A turbocharger for boosting an internal combustion engine, comprising a bearing housing, in which a rotor shaft is mounted on radial and thrust sliding bearings, on the consoles of which are mounted a turbine wheel and a compressor wheel, each located in its own housing, a diffuser, oil-supplying channels and a channel for bearing oil drainage, oil transfer elements, characterized in that in the zone of intersection with oil supply channels on the supporting working surfaces of the bearing housing made oil separation precise elements in the form of recesses in the form of a paraboloid of revolution.

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