US1253400A - Lubricating device for turbine-driven centrifugal machines. - Google Patents

Description

H. 0. LINDGREN.

LUBRICATING DEVICE FOR TU-BBINE DRIVEN CENTRIFUGAL MACHINES. APPLICATION FILED 010.28. ms. RENEWED NOV. 2. 1911.v

1,253,400.- Patented Jan. 15,1918.

f g k g 5: k q 5 J UNITED STATES PATENT orrios.

m5 010] LINDGBEN, O1 STOGKHOLH, SWEDEN, ASSIGNOR T0 AKTIEBoI JA-GET: SEPABATOB, OI S'IOGKHOLH, SWEDEN.

LUBBIGATINGDEVICE FOB TURBINE-DRIVEN CENTBIFUGAL' MACHINES.

Patented Jan. 15, 1918.

Application fled December 28, 1015, Serial Io. 88,988. Renewed ltevember 2, 1917. Serial No. 200,000.

To all whom it may concern:

Be it known that, I, HANS Onor Lmncnnng, a subject of the King of Sweden,- residing at Stockholm, Sweden, have invented certain new and useful Improvements in Lubricating Devices for Turbine-Driven Centrifugal Machines, of which the following is aspecification.

In the dairy industry centrifugal cream separators are used, which are directly driven by means of steam turbines: The steam exhausted from said turbines is usually utilized for heating or pasteurizing the milk to beseparated. In order, however, that this may take place without inconvenience, it is necessa that the exhaust steam be so far as possi le free from oil particles, which, when present, are deposited on the heating surface of the pasteurizer and thereby interfere with the transmission of heat across the walls of same.

The present invention relates to an improvement, whereby an efiective and economical lubricating of the different parts of the machinery is effected. At the same time the invention provides an ap aratus of such construction that oil partic es will not be drawn ofi with the exhaust steam.

The nature of the invention will more fully. appear from the following detailed description thereof, with reference to the accompanying drawing, which illustrates schematically the lower art of a turbine driven cream separator with the appendant" frame-and bearing devices in vertical crosssectiou. a is the turbine disk, which is This latter is at the upper and guided by the bearing ing d. e isa bottom screw, which takes up the weight of the rotating parts and eventuall other downwardly acting powers. In the aring c a bushing f is inserted to which oil is conducted in a suitable manner and from whose lower end the same flows intoachamber g.

'In the bottomofsa'd chamber a bushing h preferably made of Babbitts is inserted, leaving a small annular space between itself and the bowl spindle b. Beneath the said bushing it there is another chamber i, in the bottom of which also a bushing f is inserted not quite closely" surrounding the spindle. The chamber 13 is by means of a pipe. k

c andat the lower end by the bear:

chamber m surrounding the lower end of the bowls indie and the top of the bottom screw e. he bearing d isprovided with a bushing n, and above said bushing there is a chamber 0 formed in the wall of the bearin' This chamber is at the upper side cover by a bushing 22 not quite closely surrounding the bowl spindle. The chamber 0 is b means of the pipe gin communication wit the air, so that the atmospheric pressure always prevails in the said chamber.

The function of the above described device is as follows:

The oil escaping from the bushing f is collected in the chamber g, from which the same passes through the pipe l'into the chamber m. As atmospheric pressure always prevails in the chamber 2' there is no 0% air enters the turbine house through the annular space between the bushing the s indle, but this has no'influence upon the owing of the oil intothe chamber g nor on the conducting of same into chamber m throughpipe Z. As soon ,as theoil has filled up the said chamber m, thesame rises inside the bushing n into the chamber 0 from which it escapes through pipe g. By prevailing over-pressure in the turbine house a small .quantity of steam enters into the chamber a through the annular space between the bushing p and the spindle, and by vacuum a smal through pipe 9 and the chamber 0 into the turbine house, this havin no influence on the'lubricating of the bus ing n, as on the upper surface of same the atmospheric pressure always gevails.

By the a ve described device it thus transpires that although no close fit between the bushings h j and' a decrease-of pressure a small quantity 10o quantlty of air is sucked the bowl spindle and the bottom and cover of the surrounding turbine house is necessitated, full security is gained, that the lubricating of the parts takes place in the desired manner and independent of eventually revailing overor underpressure in the tur ine house, and in addition thereto the oil is prevented from being drawn 05 with the steam.

, The above described lubricating device may be modified in this way, that the oil is not conducted from chamber 9 into chamber m, but instead thereof into chamber 0, whereby, of course, the pipe g communieating with the atmosphere mi ht not lead from the bottom of the said 0 amber. In this case the oil sinks down through the bushing n into the chamber m, lubricating the top a of the bottom screw, whereafter the same is drawn oil from the said chamber.

What I claim is 1. In steam turbines for driving centrifugal machines, a turbine housing, bearing bushings in the top and bottom 0 the housing, a spindle passing through said bearing bushings, and means for lubricating said bushings and said spindle independently of the existing pressure in the turbine housing.

2. In steam turbines for driving centrifugal machines, a closed turbine housing having upper and lower oil-receiving chambers, a top bearing bushing above the upper oil-' recelving chamber, a bottom bearing bushin above the bottom oil chamber, a driving spindle rotatably mounted in said bushings, a turbine wheel mounted upon said spindle, and means for preventing the pressure existing in the turbine housing from interfering with the oil suppl to said bearing bushin s.

3. In steam' turbines for driving centri ugal machines, a closed turbine housing provided with a plurality of upper chambers and a plurality of lower chambers, a top bearing bushing above said upper chambers, a restricted communicating passage between said upper chambers, a communicating pas-.

sage elng rovided between said u per chamber and the interior, of said tur ine housing, a bearin at the bottom of said lower chambers, a caring bushing between said lower chambers, a communicatin passage being provided between one 0 said lower chambers and the interior of said turbine housing, one of said upper chambers and one of said lower chambers having air vents, a driving spindle mounted in said bushings, a tur ine wheel mounted on the driving spindle, and means for conveying lubricating fluid from one of said upper chambers to one of said lower chambers; substantially as described.

4. In steam turbines for driving centrifugal machines, in combination, a driving spindle, a turbine wheel mounted on said spindle, a closed turbine housing for the turbine wheel, a lubricating top bearing bushing surroundin said spindle, said housing beingprovide with an oil-collecting chamber beneath said bushing and with a second chamber beneath said oil-collecting chamber, said second chamber communicating with the oil-collecting chamber and with the open air and also communicating with the turbine housin a bottom bearing bushing, said housing eing also provided with a chamber beneath said bottom bearin bushing, which chamber communicates wlth the upper oil-collecting chamber, and said housing being provided with a chamber above said bottom bearing bushing for collecting the oil mountin through the lower bushing, said collecting c amber being connected with the open air and with the interior of the turbine housing; substantially as described.

5. In steam turbines for driving centrifugal machines, a turbine housing, top and bottom bearing bushings, a spindle passing through said bearing bushings, a turbine wheel mounted on the spindle, and means for lubricating said bushings and said spindle independently of the existing pressure in the turbine housin and for preventing the entrance of lubricating fluid into said housing.

6. In steam turbines for driving centrifugal machines, in combination, a turbine housing, a top bearing bushing, a bottom bearing bushing, said housing having anairvented chamber below said top bearing bushing and having a second air-vented chamber above the lower bearing bushing, a restricted passage 'being provided from the interior of the housing to each of said air-vented chambers, an oil chamber being provided between the upper bearing bushing and the upper air-vented chamber and having restricted communication with said air-vented chamber, an oil chamber being provided below the bottom bearing bushing and means connecting the last-named oil chamber with the up erjoil chamber.

In steam turbines for driving centrifual machines, in combination, a closed turine housing, an upper bearing bushin a.

lower bearing bushing, a shaft mounte in said bushings, a turbine-wheel upon said shaft, a bushin shaft and spac beneath said u per bearing bushing to form an air-vente chamber, and a bushing loosely surrounding said shaft and s aced above said lower bearing loosely surrounding said bushing to orm a second air-vented ehambet.

8. In steam turbines for driving centrifu gal machines, in combination, a closed turbine housing, an upper bearing bushing, a lower bushing, a shaft mounted in said bearingkg ushings, a turbine-wheel upon said shaft, ai""b'ishing spaced beneath said upper bearing bushing and loosely surrounding said shaft, an air-vented chamber being rovided between said upper bearingbushmg and said loose bushing,-said air-vented chamber communicating with the interior of the housing, a bushings aced above sald lower bearing bushing and oosely surrounding said shaft, an air-vented chamber being provided between said lower bearing bushmg and'said loose bushing, said air-vented chamber communicating with the interior of theihousing. a

9. In steam turbines for driving centrifu- 1 machines, a vturbine housin top and ttom bearin members, a spin e passing through said. members, a turbine wheel mounted on the spindle, and means for preventing the pressure existing in the turbine housing from interfering with the supply of lubricant to said bearing members.

10; In steam turbines for driving centrifugal machin in combination, a turbine housing, a pl ity of bearing members, a spin e mounted in said bearing members, "a turbine wheel on the spindle and, means for preventing the pressure existing in the turbine housing from' interfering with the supplyof lubricant to said members.

11.'In steam" turbines for driving cen-' trifugal machines, in combination, a closed turbine housing, an upper bearing bushing, a'lower bushing, a shaft mounted in said bushings, a turbine wheel upon said shaft, said housing being provided with an .air-vented chamber below said upper bearing' bushing and a second air-vented chamber above said lower bearing bushing, each of said chambers communicating wlth the interior of the turbine housing h nular surrounding said she 12, a steam-driven centrifugal machine, a turbine housing eon a tur- 1 bine wheelchamber, a rabbi bearings one of. which is'abo've and the other below said chamber, a spindle mounted in said bearings, a turbine wheel mounted on said spindle, said housing being provided with an air-chamber between each bearing and the turbine wheel chamber each of said airbe', rovided with municating "wit the atmosphere,

and means between a"-chamber and.

wheel for providing in presence o twowitn Witn 'Fann: L201.

HANS 'OLOF IHDGREN. a

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