CHARGING DEVICE
A charging device may include a compressor, a bearing housing, a shaft that is rotatably mounted in the bearing housing, a compressor wheel arranged on the shaft, and a diffuser, which may radially extend from a diffuser inlet on the compressor wheel towards a diffuser outlet on a spiral-shaped compressor housing. The diffuser may be delimited by a diffuser wall and a bearing housing wall. A first section of the bearing housing wall may be oriented originating from the diffuser inlet by an angle ranging from 2° to 30° obliquely to a radial direction, and may bring about a tapering of the diffuser cross section in the radial direction away from the shaft.
1 . A charging device comprising:
a compressor;
a bearing housing;
shaft that is rotatably mounted in the bearing housing;
a compressor wheel arranged on the shaft; and
diffuser, which radially extends from a diffuser inlet on the compressor wheel towards a diffuser outlet on a spiral-shaped compressor housing;
wherein the diffuser is delimited by a diffuser wall and a bearing housing wall; and
wherein a first section of the bearing housing wall is oriented originating from the diffuser inlet by an angle ranging from 2° to 30° obliquely to a radial direction and brings about a tapering of the diffuser cross section in the radial direction away from the shaft.
2 . The charging device according to claim 1 , wherein a width of the diffuser outlet corresponds to approximately 0.375 to 0.95 the times a width of the diffuser inlet.
3 . The charging device according to claim 1 , wherein the compressor wheel has a wheel back and engages into a recess on the bearing housing.
4 . The charging device according to claim 1 , wherein the charging device is designed as exhaust gas turbocharger.
5 . The charging device according to claim 1 , wherein the first section is adjoined by a radially extending second section of the bearing housing wall at an end radially away from the shaft, the bearing housing wall opening into a volute of the compressor housing.
6 . The charging device according to claim 5 , wherein a radial length of the second section corresponds to approximately 100% to 250% of a radial length of the first section.
7 . The charging device according to claim 1 , wherein the first section is formed in one piece with the bearing housing wall.
8 . The charging device according to claim 1 , wherein the first section and the second section of the bearing housing wall are formed as separate inserts and are connected to the bearing housing wall.
9 . The charging device according to claim 1 , wherein the bearing housing wall in a region of the diffuser includes one of a cooling duct or an air gap insulation.
10 . An internal combustion engine comprising a charging device including:
a compressor;
a bearing housing;
a shaft that is rotatably mounted in the bearing housing;
a compressor wheel arranged on the shaft; and
a diffuser, which radially extends from a diffuser inlet on the compressor wheel towards a diffuser outlet on a spiral-shaped compressor housing;
wherein the diffuser is delimited by a diffuser wall and a bearing housing wall; and
wherein a first section of the bearing housing wall is oriented originating from the diffuser inlet by an angle ranging from 2° to 30° obliquely to a radial direction and brings about a tapering of the diffuser cross section in the radial direction away from the shaft.
11 . The internal combustion engine according to claim 10 , wherein a width of the diffuser outlet corresponds to approximately 0.375 to 0.95 times a width of the diffuser inlet.
12 . The internal combustion engine according to claim 10 , wherein the compressor wheel has a wheel back and engages into a recess on the bearing housing.
13 . The internal combustion engine according to claim 10 , wherein the charging device is designed as an exhaust gas turbocharger.
14 . The internal combustion engine according to claim 10 , wherein the first section is adjoined by a radially extending second section of the bearing housing wall at an end radially away from the shaft, the bearing housing wall opening into a volute of the compressor housing.
15 . The internal combustion engine according to claim 14 , wherein a radial length of the second section corresponds to approximately 100% to 250% of a radial length of the first section.
16 . The internal combustion engine according to claim 10 , wherein the first section is formed in one piece with the bearing housing wall.
17 . The internal combustion engine according to claim 10 , wherein the first section and the second section of the bearing housing wall are formed as separate inserts and are connected to the bearing housing wall.
18 . The internal combustion engine according to claim 10 , wherein the bearing housing wall in a region of the diffuser includes one of a cooling duct or an air gap insulation.
19 . An exhaust gas turbocharger comprising:
a compressor;
a bearing housing;
a shaft that is rotatably mounted in the bearing housing;
a compressor wheel arranged on the shaft; and
a diffuser, which radially extends from a diffuser inlet on the compressor wheel towards a diffuser outlet on a spiral-shaped compressor housing;
wherein the diffuser is delimited by a diffuser wall and a bearing housing wall;
wherein a first section of the bearing housing wall is oriented originating from the diffuser inlet by an angle ranging from 2° to 30° obliquely to a radial direction and brings about a tapering of the diffuser cross section in the radial direction away from the shaft; and
wherein the first section is adjoined by a radially extending second section of the bearing housing wall at an end radially away from the shaft, the bearing housing wall opening into a volute of the compressor housing.
20 . The exhaust gas turbocharger according to claim 19 , wherein a radial length of the second section corresponds to approximately 100% to 250% of a radial length of the first section.