US822267A - Turbine. - Google Patents

Description

'PATENTED JUNE v5, 1906.

1). (LGARROWAY.

TURBINE.

APPLICATION FILED 0017.7, 1905.

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v Inventor: David C. Garrowag y a; J

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Witnesses:

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mgmmww No. 822,267. PATENTEDJUNE5,1906.-

1). a. GARROWAY.

TURBINE.

APPLICATION FILED 0OT.7,' 1905.

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Witnesses: Inventor:

David C.G-ar-rovva y,

nnrrnn screens earner orrrcn DAVID (J. GARROWAY, OF SOHENECTADY, NEW YORK, ASSEGNOR TO GEN-- ERAL ELECTRIC (JOFMIPANY, A CORPORATION OF NEW YORK.

TURBlNE Specification of Letters Patent.

Patented June 5, 1906.

" Application filed O tober 7,1905. Serial No. 281,779,

To all whom it may concern.-

Be it known that 1, DAVID C. GARROWAY, a subject of the King of Great Britain, residing at Schenectady, in the county of Schenectady and State of New York, have invented certain new and useful Lnprovements in Turbines, of which the following is a specification.

The presei'it invention has for its object to provide a simple and effective mechanism for holding up the turbine wheel or wheels and other rotating parts of a vertical-shaft turbinc or tnrhino-generatorwhile the step-hearing is being reinovcd or replaced.

I In the accompanying drawings, which ill ustrate one embodiment of my invention, Fig ure 1 is a partial vertical section of a turbine of the Curtis type and Fig. 2 is a view, partly in plan and partly in section, taken on line 2 .2 of Fig. l.

1 represents the base of the turbine, which contains a chamber 2, that is connected to a condenser. Mounted on the base is a cylindrical wheel-casing 3, which is or may be common. to all the stages of the turbine. The casing is provided. with internal shoulders for supporting the diaphragn s 4, these. diaphragms being located between adjacent wheels. The base of the turbine is provided with an inset 5, containing the step-bearing 6, the latter being'removably secured to the base by the bolts 7. The bearing comprises the usual lower stationary block and the upper movable block attached to the lower end of the main shaft 7. Since the internal construction of the step-i caring has no particu lar relation to the present invention, it will not be further alluded to.

ldounted on the. main shaft are as many bUOlGEtWVhGOlS 8 as there are stages of expansion. Secured to the wheel at points adjacent to the ])eripher are rows of buckets 9, and situated between the wheel-buckets with small clearances are more or less complete rows of intermediate buckets'll). The construction of all of the stages is similar, so that further description on this point is unnecessary.

Steam or other elastic fluid admittcd to the bucketavheels by sectionalized nozzles 1, that may be expanding or non-expanding in character. 1

It is evident from the foregoing that if the step-bearing were removed without first blocking up the wheels the wheel-buckets would engage with the intermediate buckets and injure them. in some cases the construction is such that the intermediate buckets would be unable to sustain the weight of the moving structure. In some machines the weight of the revolving structure is over sixty tons. This will give a fair idea of the necessity of providing a suitable means for supporting the wheels.

12 represents a cast-metal ring having a finished upper surface that is adapted for engagement with a corresponding surface on the under side ot'the low-pressure Wheel. This ring normally occupies a position eccentric to the axis of the shaft. It is supported in place by two or more links 13 and 14, which are of suiiicient length, measured in a direction at right angles to the shaft, or are suitably arranged to prevent the ring from tilting. i The I links are provided with upper and lower wellrounded ends and are secured in place by straps l5 and 1.6, the former being'secured to the supporting-ring and the latter to the plate 17, mounted on top of the inset. The links 13 and 1e are normally inclined some what to the shaft-axis and constitute, in ef feet, a toggle, so that when the ring is moved bodily to the right they willv at the same time impart to it a slight vertical movement, sufficient to cause engagement with the under side of the lowest Wheel-bucket.

In order to move the supporting-ring from a non-concentric toward or to a concentric position with respect to the shaft, rod 18 is provided, having on its inner end a screwthr ad that enters a nut 19, carried by a proj ection on the supporting-ring and held against turning. The opposite end. of the rod passes through .a suitable stufling-box and is squared to receive a socket-wrench. By rotating the rod 18 clockwise the support ing-ring 12 will be moved bodily to the right until it engages the Wheel. Preferably at this time the links will stand almost if not entirely vertically, and thus relieve the strain on the rod to a very large degree. When the supporting-ring engages the wheel, the stepbearing 6 can be removed Wholly or in part, and the Wei ht of the moving structure will be supporter by the inset 5 through the toggle-links 13 and 14. After the bearing has been finally adjusted in place the rod 18 is rotated anticlockwise, which causes the supporting-ring to move to the left and at the vice to stop the wheels from rotating-as, for

sired. I find i't preferable tosupport the represent the best embodiment thereof j but I the revolving element, in com same time downwardly and out of engagement with the wheel. After this is done the turbine is free to operate as usual.

Surrounding the shaft and mounted on the inset is a casing 20, containing packing-rings 21 to prevent air from leaking into the chamber in the base and to prevent steam from escaping to atmosphere. i

In addition to using the rin 12 as a device for supporting the bucket-w eels it can in case of emergency be used as a braking deexample', when the steam is shut off and the lubricator-pressure is still on'the step-bearing. .1 may depend upon the character of the links to restrain the ring against rotation, or additional means may be provided for this purpose. I

The ring is preferably madein a single piece for strength; but it can be made in two or more pieces and suitably connected, if de- Wheels at every point; but, if desired, the supporting-rings may engage the wheel ata limited number of points.

One of the features of advantage in the present construction resides in thefact that the ring-adjusting means is outside of the casing and it is unnecessary to disturb any portion of the turbine when it becomes necessary to work on the step-bearing. Again, the arrangement of the parts is such that the load on the adjusting-rod issmall.

In accordance with the provisions of the patent statutes I have described the principle of operation of my invention, together wlth the apparatus which I now consider to desire to have it understood that the appa-, ratus shown is only illustrative and that the invention can be carried out b other means. What I claim as new, and esire to secure by Letters Patent of the United States, is .1. A turbine comprising a casing, a revolving element and a step-bearing, .in combination-with a ring whose axis is normally eccentric to that of the revolving element, for supporting said element when the step-bearing is removed, and means controllable from a point outside of the casing for moving the ring toward a concentric position and into engagement with the revolving element.

2. A turbine comprising a casing, a revolving element and a step-bearin for supporting bination with a ring for supporting the revolving element when the step-bearin g is removed, toggle-links for supporting the ring, and a means controllabl e from the outside of the casing for moving the ring horizontally and vertically to engage the revolving element.

3. A turbine comprising a casing, a revolving element, and a step-bearing for support ing the revolving element, in combination with a means for supporting the revolving element when the step-bearing is removed, comprising a ring eccentrically located with respect-t0 the shaft, toggle-links for supporting the ring, and a means for straightening thetoggle-links and at the same time moving the ring toward a concentricposition with respect to the shaft-axis.

4. A turbine comprising a casing, a rotating element, a shaft therefor, and a ste'p-be aring for supporting the shaft, in combination with a supportingring normally occupying a position eccentric with respect to the shaft, ioggle-links for supporting the ring that are located on opposite sides of the shaft, and a rod extending throu 11 the casing by means of which the toggle lin s can be straightened.

5. A turbine comprising a casing having a base with an inset formed. thereon, a vertical shaft for supporting the revolving element, and a step-bearing therefor which is secured to the base, in combination with a supporting Y device adapted to be moved into engagement with the revolving element, toggle-linksfor supporting the device, which in turn are supported by the inset, and a'means extending to the outside of the casing for straightening the toggle-links.

6. A turbine comprising a casing, a revolv ing element, and a steprbearing for support ing the revolving element, in combination with a means-for supporting the revolving element when the step-bearin is removed,

comprising a device situated slow the fevolving element and toggle-links situated below said device and supported by the casing,

and means for moving thesaid device into engagement with the revolving element by moving the to gle-Iinks. v

In witness w ereof Ihave hereunto set my hand this 6th day of October, 1905.

DAVID C. GARROWAY.

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