Turbine housing and method for making the same

A turbine housing formed from at least two housing sections, said at least two housing sections having mating wall portions which are positioned adjacent to each other to form the peripheral walls of said housing, wherein said mating wall portions are offset from one another such that the distance from the axis of the turbine housing to the first mating wall portions, in the direction of fluid flow in the turbine, is less than or equal to the distance from said axis to the second mating wall portions in the direction of flow.

An air turbine housing comprising a plurality of housing members wherein the distance between mating portions of opposite side walls of one housing member is a first distance and the distance between the mating portions of opposite side walls at one end of an adjacent member, in the direction of fluid flow in the turbine, is greater than or equal to said first distance and the distance between the mating portions of opposite side walls at the other end of said adjacent member is less than or equal to said first distance.

A housing for use with a turbine comprising at least two adjacent wall members forming the turbine chamber, the wall members having a U shaped cross-section, wherein the interior surfaces of said adjacent wall members are offset with respect to one another such that the cross-sectional area of the chamber formed by the mating portion of a first of said adjacent wall members is less than or equal to the cross-sectional area of the chamber formed by the mating portion of a second of said adjacent wall members, in the direction of fluid flow in said chamber.

A turbine housing formed from at least two adjacent sections, said adjacent sections being mated to each other at mating portions thereof, a first of said adjacent section having oppossed side walls wherein the distance between said oppossed side walls is a first distance and wherein the opposed side walls at the mating portion of said first section at one end thereof is beveled such that the distance between the oppossed side walls at the beveled portion thereof is a second distance, the second distance being greater than the first distance, and wherein the distance between oppossed side walls of the other of said adjacent sections is a third distance which is greater than said first distance and less than said second distance.

A turbine housing formed from at least two adjacent sections, said adjacent sections being mated to each other at mating portions thereof, a first of said adjacent sections having oppossed side walls and a first curved wall therebetween and a second of said adjacent sections having oppossed side walls and a second curved wall therebetween, wherein the radius of the first curved wall is a first radius and the radius of the second curved wall is a second radius wherein the second radius is greater than the first radius, and wherein the first curved wall is tapered outward at one mating portion thereof such that the radius at said mating portion is a third radius, said third radius being greater than said second radius.

A method of forming a turbine housing to reduce turbulence therein comprising forming a first housing member having a predetermined distance between opposite walls thereof;

• forming a second housing member wherein the distance between opposite walls at one end thereof is greater than the predetermined distance and the distance between opposite walls at the other end thereof is less than the predetermined distance;
• fixing said first and second members together with the first end of said second member being adjacent to the first member wherein the flow path through said housing is in a direction from said first member into the second member through the first end thereof.