Bursting protection
A compressor casing includes a casing insert with a flexible element in the force flux between the insert wall contour and the outer compressor casing. The flexible element is assembled from a support ring and ribs, wherein the ribs axially in front of the support ring and the ribs axially behind the support ring are arranged in an offset manner in relation to each other. Due to the arrangement of the ribs in an offset manner, the axial force flux between the insert wall contour and the outer compressor casing is deflected twice, and an axially compliant flexible construction is achieved.
1. A compressor of an exhaust gas turbocharger, the compressor comprising:
a compressor impeller which is rotatable around an axis in an axial direction, and includes a hub;
an outer compressor casing having an axial stop oriented toward the compressor impeller;
a casing insert which is arranged radially outside the compressor impeller, the casing insert including an insert wall contour which, in conjunction the hub of the compressor impeller, delimits a flow passage, wherein the casing insert abuts against the axial stop of the outer compressor casing;
a flexible element configured to transfer axial forces from the insert wall contour to the outer compressor casing, the flexible element including at least two ribs which are axially oriented and arranged in an offset manner in relation to each other; and
a support element which interconnects the ribs of the flexible element, the support element being oriented at an angle to the axial direction and being arranged between the ribs with regard to the axial direction.
2. The compressor as claimed in claim 1 , wherein the flexible element comprises a ring segment-like support element, which is oriented in the circumferential direction of the compressor impeller, and
wherein the support element includes a plurality of axially oriented ribs on one axial side and at least one axially oriented rib on another axial side of the support element.
3. The compressor as claimed in claim 1 , wherein the flexible element comprises a ring-like support element, which is arranged in the circumferential direction of the compressor impeller, and
wherein the support element has a plurality of axially oriented ribs on two axial sides of the support element.
4. The compressor as claimed in claim 1 , wherein the support element is oriented perpendicularly to the axial direction and is arranged between the ribs with regard to the axial direction.
5. The compressor as claimed in claim 4 , wherein the flexible element comprises a ring segment-like support element, which is oriented in the circumferential direction of the compressor impeller, and
wherein the support element has a plurality of axially oriented ribs on one axial side and at least one axially oriented rib on another axial side of the support element.
6. The compressor as claimed in claim 4 , wherein the flexible element comprises a ring-like support element, which is arranged in the circumferential direction of the compressor impeller, and
wherein the support element has a plurality of axially oriented ribs on two axial sides of the support element.
7. The compressor as claimed in claim 1 , wherein the flexible element is arranged in a force flux between the insert wall contour and the axial stop to transfer axial forces from the insert wall contour to the axial stop of the outer compressor casing.
8. The compressor as claimed in claim 1 , wherein the flexible element is part of the outer compressor casing, and
wherein the axial stop is arranged in a force flux between the insert wall contour and the flexible element to transfer axial forces from the insert wall contour to the outer compressor casing.
9. The compressor as claimed in claim 1 , wherein the flexible element comprises an encompassing centering ring, which is connected via a connecting rib to the insert wall counter, to transfer axial forces from the insert wall contour to the flexible element.
10. The compressor as claimed in claim 9 , wherein the connecting rib between the insert wall contour and the flexible element is formed in a double-curved configuration.
11. An exhaust gas turbocharger, comprising a compressor as claimed in claim 1 .
12. The compressor as claimed in claim 2 , wherein the flexible element is arranged in a force flux between the insert wall contour and the axial stop to transfer axial forces from the insert wall contour to the axial stop of the outer compressor casing.
13. The compressor as claimed in claim 6 , wherein the flexible element is arranged in a force flux between the insert wall contour and the axial stop to transfer axial forces from the insert wall contour to the axial stop of the outer compressor casing.
14. The compressor as claimed in claim 6 , wherein the flexible element is part of the outer compressor casing, and
wherein the axial stop is arranged in a force flux between the insert wall contour and the flexible element to transfer axial forces from the insert wall contour to the outer compressor casing.
15. The compressor as claimed in claim 6 , wherein the flexible element comprises an encompassing centering ring, which is connected via a connecting rib to the insert wall counter, to transfer axial forces from the insert wall contour to the flexible element.
16. The compressor as claimed in claim 10 , wherein the connecting rib between the insert wall contour and the flexible element is formed in an S-shaped axial profile.
17. An exhaust gas turbocharger, comprising a compressor as claimed in claim 6 .