Oil-oil bushing and oil transformer

1. An oil-oil bushing, comprising:

a rotationally symmetrical, paraboloid-like, hollow bushing element of a solid insulating material, along an axial extent of which there is formed radially toward an inside a tubular bushing channel, a wall thickness of which is tapered conically toward at least one of its two ends;

an electrical bushing conductor fitted into the bushing channel with a form fit and protruding from it on both sides;

a respective hollow-cylindrical shielding element of a conductive material positioned at one of the two axial ends of the bushing channel, which element is thick-walled at least in certain regions, which element encloses on its one side a respective end of the bushing channel with the bushing conductor protruding from it, and another side of the shielding element being configured for receiving and electrically contacting a respective connecting conductor, axial ends of the shielding element being of a round design; and

contacting means provided in the shielding element for its electrical contacting with the protruding bushing conductor or with a received connecting conductor, wherein the contacting means include at least one thread running radially through a wall of the shielding element, and a screw arranged therein for fixing the protruding bushing conductor or a received connecting conductor.

2. The oil-oil bushing according to claim 1 , wherein the shielding element is coated at least on its outer surface with an insulating material.

3. The oil-oil bushing according to claim 1 , wherein a widened open end of the paraboloid-like bushing element goes over into a radially outwardly adjoining terminating region running perpendicularly in relation to an axis of rotation.

4. The oil-oil bushing according to claim 1 , wherein the electrical bushing conductor fitted into the bushing channel has at both of its protruding ends a respective form that is suitable for form-fitting electrical contacting of a respective connecting conductor with a correspondingly complementary form.

5. The oil-oil bushing according to claim 1 , wherein the contacting means of the shielding element comprise:

at least one annular element of an electrically conductive material, which is configured for enclosing the protruding bushing conductor or a received connecting conductor in a contacting manner.

6. The oil-oil bushing according to claim 1 , wherein at least three threads of a shielding element are arranged in the form of a star.

7. The oil-oil bushing according to claim 1 , wherein a shielding element both for the protruding bushing conductor and for a received connecting conductor comprises:

respective contacting means.

8. The oil-oil bushing according to claim 1 , wherein a shielding element comprises:

internal cavities for reducing its wall thickness.

9. An oil transformer, comprising:

an oil tank with a first oil-filled internal space area, in which a transformer is arranged; and

a second oil-filled internal space area that is separated from the first area by a wall, the wall having at least one bushing, by which an electrical connection of a first electrical connecting conductor in the first internal space to a second electrical connecting conductor in the second internal space is formed,

wherein the at least one bushing is an oil-oil bushing according to claim 1 .

10. The oil-oil bushing according to claim 1 , wherein the shielding element is coated at least on its outer surface with an epoxy resin as an insulating material.

11. The oil-oil bushing according to claim 2 , wherein a widened open end of the paraboloid-like bushing element goes over into a radially outwardly adjoining terminating region running perpendicularly in relation to an axis of rotation.

12. The oil-oil bushing according to claim 11 , wherein the electrical bushing conductor fitted into the bushing channel has at both of its protruding ends a respective form that is suitable for form-fitting electrical contacting of a respective connecting conductor with a correspondingly complementary form.

13. The oil-oil bushing according to claim 12 , wherein the contacting means of the shielding element comprise:

at least one annular element of an electrically conductive material, which is intended for enclosing the protruding bushing conductor or a received connecting conductor in a contacting manner.

14. The oil-oil bushing according to claim 13 , wherein at least three threads of a shielding element are arranged in the form of a star.

15. The oil-oil bushing according to claim 14 , wherein a shielding element both for the protruding bushing conductor and for a received connecting conductor comprises:

respective contacting means.

16. The oil-oil bushing according to claim 15 , wherein a shielding element comprises:

internal cavities for reducing its wall thickness.

17. An oil transformer, comprising:

an oil tank with a first oil-filled internal space area, in which a transformer is arranged; and

a second oil-filled internal space area that is separated from the first area by a wall, the wall having at least one bushing, by which an electrical connection of a first electrical connecting conductor in the first internal space to a second electrical connecting conductor in the second internal space is formed,

wherein the at least one bushing is an oil-oil bushing according to claim 16 .