Separator having a lubrication system for a short spindle drive

1. A separator comprising:

a rotatable centrifugal drum having a vertical axis of rotation and an inflow line for a material to be processed by the separator;

a drive spindle for the drum rotatably mounted via a mounting to a housing supported elastically on a machine stand section, the mounting including a housing having a first and a second bearing;

a drive device including an electric drive motor having a stator and a rotor which is aligned with the drive spindle;

a lubricant system configured to lubricate the mounting, the lubricant system including a lubricant circuit to convey lubricant and a lubricant collecting container, the entire lubricant circuit and at least the lubricant collecting container being arranged axially above the rotor;

the lubricant being conveyed out of the lubricant collecting container directly through a lubricant duct formed in the housing and extending into a region of or above a neck bearing of the mounting; and

wherein the entire mounting of the drive spindle being arranged axially above a bottom of the lubricant collecting container.

2. The separator as claimed in claim 1 , wherein the stator is connected rigidly to the machine stand and the rotor, the drive spindle, the centrifugal drum and the housing form a unit which is supported elastically on the machine stand section and which oscillates during operation.

3. The separator as claimed in claim 1 , wherein the lubricant collecting container surrounds the drive spindle.

4. The separator as claimed in claim 1 , wherein the lubricant collecting container is of a single-conical design.

5. The separator as claimed in claim 1 , wherein the lubricant collecting container rotates with the drive spindle during an operation of the separator.

6. The separator as claimed in claim 1 , wherein the first bearing is an upper neck bearing and the second bearing is a lower foot bearing.

7. The separator as claimed in claim 1 , wherein the housing is supported on the machine stand section by at least one elastic element.

8. The separator as claimed in claim 7 , wherein the at least one elastic element is distributed circumferentially as a plurality of paired arrangements including two elastic elements which are oriented perpendicularly to one another.

9. The separator as claimed in claim 8 , wherein the paired arrangement of the elastic elements is selected such that straight lines running through the longitudinal mid-axes of a first of the elastic elements intersect at a point which lies axially in the middle, within the rotor on the axis of rotation.

10. The separator as claimed in claim 9 , wherein the arrangement of a second of the elastic elements is arranged such that straight lines running through their longitudinal mid-axes intersect on the axis of rotation, within the drive spindle, and at a point lying above the mounting.

11. The separator as claimed in claim 1 , wherein the drive device is configured such that a center of rotation of an oscillating unit lies at an axial and radial mid-point of the rotor.

12. The separator as claimed in claim 1 , wherein the machine stand section includes a radially inner first wall section which tapers conically upward and which merges downwardly into a second wall section extending cylindrically vertically downward.

13. The separator as claimed in claim 12 , wherein a motor housing is attached to the cylindrical second wall section at a bottom area of the second wall section.

14. The separator as claimed in claim 13 , wherein the cylindrical second wall section merges radially upwardly and outwardly into a conically widening section which merges in turn into a radially outer flange section.

15. The separator as claimed in claim 12 , wherein the housing includes an upper flange-like region which has a first flange wall section widening outwardly and downwardly and a second flange wall section, adjoining the first flange wall section radially outwardly, the second flange wall section widening upwardly, and the conical and cylindrical wall sections are lower supporting surfaces and the flanged wall sections are upper supporting surfaces of the first and second elastic elements oriented perpendicularly to one another.

16. The separator as claimed in claim 15 , wherein the first flange wall section is adjoined to a cylindrical housing region which extends axially downwardly and which surrounds the drive spindle, and the neck bearing and a foot bearing of the mounting are distributed between an inner circumference of the housing and an outer circumference of the drive spindle.

17. The separator as claimed in claim 16 , wherein the lubricant collecting container is arranged in a space delimited upwardly and radially outwardly by the machine stand section and downwardly by the drive motor, inwardly by the housing region and, further below by the drive spindle.

18. The separator as claimed in claim 1 , wherein the lubricant collecting container is connected fixedly to the drive spindle.

19. The separator as claimed in claim 1 , wherein a conveying member of the lubricant system penetrates the lubricant collecting container.

20. The separator as claimed in claim 1 , wherein an extension or one end of a lubricant duct extending axially into a region above a neck bearing of the mounting penetrates into the lubricant collecting container and serves as a conveying member for conveying the lubricant out of the lubricant collecting container in the manner of a paring disk into a region between an inner circumference of the housing and an outer circumference of the drive spindle, above the mounting, from where it runs downwardly through the mounting and from there downwardly back into the lubricant collecting container.

21. The separator as claimed in claim 1 , wherein the lubricant collecting container surrounds the drive spindle in a torus-like manner.

22. The separator as claimed in claim 1 , wherein the lubricant collecting container is of a double-conical design.