Axial sliding bearing arrangement for a pump impeller of a radial pump and a radial pump comprising the axial sliding bearing arrangement

1. An axial sliding bearing arrangement for a pump impeller of a radial pump comprising

a first, rotating friction surface pointing in an axial direction (A);

a second non-rotating friction surface facing the first rotating friction surface;

a swivel head body including the second, non-rotating friction surface, the swivel head body being axially supported via an axial support surface, and the swivel head body being radially supported in a resiliently yielding manner at radial support surfaces by a first spring.

2. The axial sliding bearing arrangement according to claim 1 , wherein the axial support surface is supported in the axial direction (A) by a point contact.

3. The axial sliding bearing arrangement according to claim 1 , wherein the axial support surface is supported axially rigidly except for material elasticity or in a resiliently yielding manner.

4. The axial sliding bearing arrangement according to claim 1 , wherein the first, rotating friction surface has a larger area in contrast to an end surface of a shaft the rotating friction surface is to be mounted.

5. The axial sliding bearing arrangement according to claim 1 , wherein a rotary bushing includes the rotating friction surface, the rotary bushing configured and formed to interact in an axially fixed manner, and for conjoint rotation, with a shaft of which the rotary bushing is to be mounted.

6. The axial sliding bearing arrangement according to claim 1 , wherein a friction portion of the swivel head body includes the second, non-rotating friction surface, and/or a holding portion of the swivel head body includes the axial support surface and the radial support surfaces.

7. The axial sliding bearing arrangement according to claim 6 , wherein the holding portion has a smaller radial extension than the friction portion of the swivel head body.

8. The axial sliding bearing arrangement according to claim 1 , wherein the swivel head body is pivotable with its longitudinal axis (L) in at least one direction by an angle (α)>0° with respect to the axial direction (A), is pivotable against the first spring.

9. The axial sliding bearing arrangement according to claim 8 , wherein the angle α is >0° and less than or equal to 2°.

10. The axial sliding bearing arrangement according to claim 1 , wherein a spring stiffness of the first spring moans is configured such that with axial support forces within the axial sliding bearing arrangement, an angular shift of the second, non-rotating friction surface takes place such that a design-imposed maximally possible contact surface between the rotating friction surface and the non-rotating friction surface occurs.

11. The axial sliding bearing arrangement according to claim 1 , wherein the axial support surface is supported by a support element with a spherical or cap shape, or a spherical-cap shape.

12. The axial sliding bearing arrangement according to claim 11 , wherein the support element is held in a radially resiliently yielding manner inside a bearing bushing by a second spring.

13. The axial sliding bearing arrangement according to claim 1 , wherein the first spring includes spring arms free at one end or connected at both ends.

14. The axial sliding bearing arrangement according to claim 1 , wherein the swivel head body includes a holding portion with a radial support surface, the holding portion is formed, as viewed in cross-section, circularly, ovally or polygonally, and the first spring and a further second spring interacts in a manner dispersed over a circumference (U) of the radial support surfaces of the holding portion.

15. The axial sliding bearing arrangement according to claim 1 , wherein the swivel head body includes a holding portion with an axial support surface formed convexly.

16. The axial sliding bearing arrangement according to claim 1 , wherein the first spring and a support element or the first spring are integrally formed as a bearing bushing.

17. The axial sliding bearing arrangement according to claim 1 , wherein the first spring respectively interact with flat or arched flat sides of a holding portion of the swivel head body.

18. The axial sliding bearing arrangement according to claim 1 , wherein the swivel head body is held rotation resistant in a rotation direction around a longitudinal axis (L).

19. A radial pump comprising at least one axial sliding bearing arrangement according to claim 1 .

20. The radial pump according to claim 19 , wherein the swivel head body is radially and axially supported with respect to a pump housing.

21. The radial pump according to claim 19 , wherein a rotary bushing includes the rotating friction surface, which is formed as one piece with the pump impeller.

22. The radial pump according to claim 19 , wherein a rotary bushing includes the rotating friction surface and the rotary bushing has at least one groove at the first, rotating friction surface.

23. The radial pump according to claim 19 , wherein the swivel head body is arranged radially in a bearing recess in an inlet of the radial pump.

24. The radial pump according to claim 19 , wherein a support element is axially supported at a base of a bearing recess or at a base of a bearing bushing.

25. The radial pump according to claim 19 , wherein the radial pump is formed as a dry-runner type pump.

26. The axial sliding bearing arrangement according to claim 1 , wherein the swivel head body is pivotable against the first spring.