US813963A - Centrifugal machine. - Google Patents

Description

PATENTED FEB. 27, 1906.

A. PREITAG. V GBNTRIFUGAL MACHINE.

'APPLIOATIONIILED JAN. 8. 1902.

2 SHEETS-SHEET l.

I ZQ l f 02/ *ww I 7" T /"I I H unrrnn STATES PATENT OFFICE ANDREAS FREITAG, OF AMSTERDAM, NETHERLANDS, ASSIGNOR TO WATSON, LAIDLAW & COMPANY, OF GLASGOW, SCOTLAND.

CENTRIFUGAL MACHINE.

Specification of Letters Patent.

Patented Feb. 27, 1906.

To all whom it may concern.-

Be it known that I, ANDREAS FREITAG, factory manager, residing at 57 Spaarndamerstraat, Amsterdam, Netherlands, have invented a new and useful Improvement in Centrifugal Machines, of which the following is a specification.

This invention relates to the improvement of centrifugal machines or hydro-extractors whereby a fluid under suitable pressure is substituted for the ordinary footstep-bear- %t is well known that the lubrication of the footste bearings of a certain class of centrifuga machines is augmented byforcing oil or other lubricating fluid under the revolving spindle, so as to remove or lessen the weight of the footstep or bearing. A possible defect of this arrangement is that in the event of the supply of oil failing the Whole Weight of the revolving parts would come in direct contact with the footstep-bearing, which would result in the abrasion of that part fromwant of lubrication. I construct the machine in such a manner that a supply of oil or other lubricating fluid is maintained in the footstep-bush at such a pressure as will support the whole of the revolving spindle, and thereby form a liquid footstep-bearing.

The combination of fluid-pressure footstepbearing as described is applicable to all kinds of centrifugal machines irres ective of the method of driving, the word footstep being applicable to the spindle of both suspended and underdriven centrifugals whether they have rigid bearings, elastic or semi-elastic hearings, or self-balancing bearings.

In machines driven by fluid-pressure I may use the fluid which serves to drive the machine to support the spindle.

In order to make my invention more clear, reference will be had to the accompanying drawings, in which Figure 1 is an elevation, part in section, of my invention applied to a form of the suspended centrifugals of the Weston type; and Fig. 2 is a similar view of the invention as applied to another form of the same type of machines.

In these machines there is an outer revolving spindle A and a stationary spindle B within it, which carries the weight of the revolving spindle A, basket, and load. I make In order to remedy this defect,

the inner spindle B hollow and force the lubricating fluid under pressure into the hollow s indle by the pipe 0 through the passage D to the port E, and so into the chamber F. A cup M is secured to the inner wall of the outer spindle A at the base of the spindle B. Attached to the inner wall of the revolving spindle A there is a ring or bush G, and a similar ring or bush H is attached to the stationary spindle B. The pressure of the fluid in the chamber F acting on the ring or bush G raises the spindle A, with basket. and load. The brake-surface J is attached to the spindle A and will be raised off the brake-surface K when the spindle rises, and the movable parts will be free to revolve. The brake-surface J is formed convex and the brake-surface K correspondingly concave, so as to allow for oscillation of the basket. In order to prevent the centrifugal from rising too high, I provide the ort N, which is uncovered by the ring G W en the spindle has risen to the desired height. The lubricating fluid escapes through the port N and the ducts O O,formed on the lower and u per ends of the spindle, into the chamber aliove the brake-surface J and through holes P onto the brake-surface K. It then escapes through the pipe L and returns to the pump.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is the following:

1. In a centrifugal machine, the combination of an outer revolving spindle, an inner axially-movable spindle, a bush on the inner wall of said outer spindle, a bush on the outer wall of said inner spindle, said inner spindle having a port discharging into the chamber formed between the two said bushes.

2. In a centrifugal machine, the combination of an outer revolving s indle, an inner axially-movable spindle, a ush rigidly secured to the inner wall of the revolving outer spindle, a bush rigidly secured to the outer wall of the inner stationary spindle, said inner spindle having a port for leading a fluid under pressure to the chamber formed between the two said bushes.

3. In a centrifugal machine, the combination of an outer revolving spindle, an inner axially-movable spindle, a rin on the inner wall of the outer spindle, a bus on the outer wall of the inner spindle, said ring and bush forming together with their respective spindle-walls a chamber for receiving a fluid unspindles a chamber for the reception of. a fluid der pressure, said inner spindle having a duct under pressure. 10 for leadin the fluid under pressure to the In testimony whereof I afiix my signature said cham er. in the. presence of two witnesses.

5 4. In a centrifugal machine, the combina- ANDREAS FREITAG.

tion of two concentric hollow spindles, and Witnesses: bushes on the adjacent walls of said spindles F. DIERHAUS,

forming with the walls of their respective L. GOBET.

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