US1155163A - Geared turbine-driven set. - Google Patents

Geared turbine-driven set. Download PDF

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US1155163A
US1155163A US3036815A US3036815A US1155163A US 1155163 A US1155163 A US 1155163A US 3036815 A US3036815 A US 3036815A US 3036815 A US3036815 A US 3036815A US 1155163 A US1155163 A US 1155163A
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turbine
shafts
driven
shaft
bearings
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US3036815A
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Richard H Rice
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General Electric Co
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General Electric Co
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02043—Gearboxes for particular applications for vehicle transmissions

Definitions

  • the object of my invention is to.provide an improved arrangement of horizontal shaft geared turbine driven sets and one which is free from the objections abovenoted.
  • My invention is particularly applicable to turbine driven sets of large size where the power transmitted from. the turbine to the driven apparatus is correspondingly great and where the stresses to be taken into account are of a high order.
  • the following figures are given of a 1000 kw. turbo-generator'set constructed by me in which the turbine shaft rotates at 3600 R. P. M. and the generator at 600 R. P. M.
  • the complete set measures'in length in round numbers 24 feet and weighs approximately 53,500 pounds, of which the turbine weighs about 19,200 pounds and the generator about 16,700 pounds
  • the combined bridging member and suspended gear box is roughly 10 long and 4' 10" high at' the narrowest point. The.
  • Figure 1 is a view in side. elevation of a 10 geared turbo-generator
  • Fig. 2 is a longitudinal section through the hollow bridge member or suspended gear box
  • Fig. 3 ' is a cross-sectional view taken on line 3-3 5 01 Fig. 2.
  • L '6' indicates the turbine and 7 the genflderator or other apparatus driven thereby
  • a circular head 8 having an internal flange which is rabbeted to the corresponding surface of the turbine and apparatus ripen of, the member between heads is substantially rectangular, the greatest dimension of which is vertical to resist vertical stresses.
  • the top of the member is closed by a removable cover 9, which is bolted to said member and also to the right hand head.
  • transverse stiffening ribs 9 located on opposite sides of-the driven gear and which also serves to confine the lubrica'ntto .the gear containing chamber.
  • each wall having a shaft opening with a removable. cover 13 to confine the lubricant to the gearchamber, It is also provided'with transverse webs ll and 15 which, in addition to bracing the member, also serve as supports for the bearings.
  • Tlieiweb 15 has, generally speaking, a U- shaped opening, and atthe' bottom is prothe opposite side. Between thecasings of thereby. 'Such a joint, while simple in construction, is very strong.
  • Thecross-section l The bridge member or suspended gear box f is braced by transverse walls 1:2. located near mas for the short lower driving shaft. In hori- I shaft is lubricatedby .oil rings that engage the upper surface thereof and dip into the oil in the. chamber below.
  • the bearing .18 for the low speed or driven shaft is supported from above and is so arranged that it'can' be removed with the shaft when necessary or desirable.
  • the bearing is held in. place by a cross-member 19 which forms a seat therefor.
  • the ends of the member are seated on large flat shoul ders :20'formed at the upper end of the U- shaped web or rib. It is also to be noted that the vertical legs of the web extend from the bottom to practically the top of the bridging member orgear box't-hereby increasing the stifl'ness of the structure.
  • the cross-member 19- has down turned ends and between said ends and shoulders on opposite sides ,of the web are located long and relatively thin wedges :23 so that, by slightly easing the wedge or wedges on one side and driving in the other or others on the opposite side, the bearing support, and hence the bearing, can be moved bodily from one'side to another by the necessary amount.
  • the pinion which may be of any suitable construction both as to body and tooth formation, is mounted on a short shaft which is connected to the turbine shaft 26 by aflexible coupling 27 of any'suitable construction.
  • the driven-gear which also may be of any suitable construction both as to body and tooth formation, is mounted on a short shaft which is connected to the shaft 28 of the generator or other apparatus by a solid or flexible coupling :29, as occasion demands.
  • a chamber containing lubricant In the lower part of the geaiwbox is a chamber containing lubricant, the ribs and webs being provided with openings, such as 30, to permit oil to freely flow from one place to another.
  • a darn 31 is provided from which oil flows from the main supply to the sump 32 from which itis drained back to its source. Ow ing to the character of the figures the sup ply pipe for the oil is not shown. I have notspecifically illustrated the means for lubricating the bearings of the shaft of the driven gear because this can be done in a variety of ways.
  • the turbine shaft is provided with a thrust bearing 33 and the generator or driven shaft with a thrust bearing 34.
  • a thrust bearing 33 and the generator or driven shaft with a thrust bearing 34.
  • 'Both of these hearings are of a character to limit the motion in either direction, and being old and well lmownhave not been specifically illustrated or described.
  • I have shown an elastic fluid turbine arranged to drive an electric generator but it is evident that a pump, or compressor may form the driven apparatus. Also in other cases I may drive the low speed shaft by a turbine and cause it to rotate the other element of the system at a higher speed.
  • said member being hollow and --provided with transverse walls near its ends through which the shafts extend and also withinternfil' supports, gearing for transmitting motion from one shaft to the other, shafts for, said gearing, and bearings for the gearing shafts which are carried by said internal supports.
  • shafts for the turbine and apparatus shafts for the turbine and apparatus, a suspended bridge member which unites the turbine and apparatus, said member being hollow and provided with a pair of webs or ribs each having a U-shaped opening therein, gearing for transmitting motion from one shaft to the other, shafts for said gearing, bearings for the gearing shafts arranged in sets, one set of bearings being mounted in the bottoms of said openiiigs and the other set located at the top and in vertical alinement with the first set.
  • a turbine In combination, a turbine, an apparatus driven thereby, shafts for the turbine and apparatus, a suspended bridge member. which unites the turbine and apparatus, said member being hollow and provided with a pair of vertically ,dispo'sedwebs, each of which has a seat atitslower end and tinished surfaces at its upper end, gears for transmitting motion from one shaft to the other located one above the other, shafts for. said gears, bearings for the lower gear shaft which engage the seats, and bearings for the upper gear shaft which are supported by said finished surt'aces.
  • a turbine In combination, a turbine, an apparatus driven thereby, shaft-s for the turbine and apparatus, a hollow suspended bridging member which unites the turbine and apparatus, said member being braced internally by webs, an archedcover .for the.member which is rigidly bolted thereto and forms a part of the gear casing, gearsfor transmitting motion from one shaft to the other located within the member, shafts for said gears, and bearings for the gear. shafts supported by the member.
  • a ,geared turbo-generator set the combination of a turbine casing having supporting feet, a generator easing having supporting feet, a combined bridge and gear box supported in suspension between said casings, said bridge "and casings forming a rigid frame for the set, bearings carried by the gear box, vertically alined shafts in said i bearings, and reduction gearing carried by Said shafts.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wind Motors (AREA)

Description

R. H. RICE.
GEARED TURBINE DRIVEN SET. APPLICATION FILED MAY 25. 1915.
1 1 55, 63 Patented Se f. 2S, 1915.
Inventor, Richard H. Rice.
xrq-umu um um: msmamm c7 RICHARD H. Bron,
0F LYNN, MASSACHUSETTS, ASSIGNUB T0 GENERAL ELECTRIC COIDLUHBQBTT A CQRPOBATION 015 NEW YORK.
GEARED TURBINE-DRIVEN SET.
Specification 0r Letters latent. Famnted Sept. 28, 1915.
Application filed May 25, 1915. Serial No. 30,368.
driven thereby. These may be of any char actor, but I have chosen to illustrate an electric generator driven by .a high speed steam turbine as the conditions presented are rather more severe and exacting than with most other apparatus.
There are on the market at the present time geared horizontal shaft turbines arranged to drive electric generators and pumps. In these constructions the driving andthc driven shafts-art; located side by side and in the same horizontal plane with the gears between. The turbine and apparatus driven thereby are bolted to a bed plate as is also the gear box, the latter containing bearings for, the shafts and being entirely independent of the turbine and.
driven apparatus. Such a construction, is open to very serious objections, especially for large sizes. In the first placeit requires the useof a bed plate which, of itself, is costly and heavy. 'In the second place the driving and driven shafts are located side by side but spaced apart in the same horizontal plane: instead of being in the same vertical plane. which gives rise to heavy twisting strains or stresses, and to reduce the eifects thereof the bed .plate has to be madeabnormally heavy thereby increasing its cost. In the third place,-t-he-independent mounting of the turbine, gear box and generator re quire that the bed plate shall be further increased in weight to reduce the effects of vertical strains or stress. Furthermore, a
relatively long and thin flat bed plate is not well adapted to resist vertical stresses no matter how itis constructed. This arrangement also makes it more difiicult to machine the parts and to 'aline them.
The object of my invention is to.provide an improved arrangement of horizontal shaft geared turbine driven sets and one which is free from the objections abovenoted. a
In carrying out my intention I do away with the bed plate altogether thereby eflecting a saving in cost and weight at the outset. 1 provide both the turbine, and the apparatus driven thereby, in this case an electric generator, with good substantial feet which rest directly on the foundation. Between the turbine and generator is located a bridging member which rigidly unites the two and which has its greatest strength in a vertical. plane where the greatest stresses occur. Thisbridging member, or suspended gear box, as it may be called, also contains the gears and bearings for the driving and driven shafts, said shafts being located in the same vertical plane with the driving shaft preferably, but not necessarily, at the bottom. This vertical arrangement avoids the twisting strains which are'so objectionable in prior constructions. The stresses in this case are-insignificant.
My invention is particularly applicable to turbine driven sets of large size where the power transmitted from. the turbine to the driven apparatus is correspondingly great and where the stresses to be taken into account are of a high order. As illustratingthe' problem confronting side .the engineer, and not as a limitation of my invention, the following figures are given of a 1000 kw. turbo-generator'set constructed by me in which the turbine shaft rotates at 3600 R. P. M. and the generator at 600 R. P. M. The complete set measures'in length in round numbers 24 feet and weighs approximately 53,500 pounds, of which the turbine weighs about 19,200 pounds and the generator about 16,700 pounds, The combined bridging member and suspended gear box is roughly 10 long and 4' 10" high at' the narrowest point. The. total weight thereof is about 17,600 pounds.' From these figures it is apparent that thebridging mem ber has considerable weight and length. Owing to the weight the tendency of the parts to get into vibratory motion is reduced to a small value, and owing to its length the member possesses a certain degree of elasticity, the two factors coiiperatingll reducer i015 I vibration and noise and largely prevent vibrations from being transmitted to the foun-i dation.
In the accompanying drawing illustrating one of the embodiments of my invention,
Figure 1 is a view in side. elevation of a 10 geared turbo-generator; Fig. 2 is a longitudinal section through the hollow bridge member or suspended gear box, and Fig. 3 'is a cross-sectional view taken on line 3-3 5 01 Fig. 2.
just-ment. As both sets of bearings are simii'ided with a seat to receive the bearing 16 :Beferring to the drawing, 5 indicates a I foundation usually of concrete, upon which i the set is directly mounted.
L '6' indicates the turbine and 7 the genflderator or other apparatus driven thereby,
each mounted on two feet as indicated at 6 and 7. Only one foot for each machine shows'in the drawing, but it will be under.- stoodthat there isanot-her similar foot on as oil. At each end 'of the member is a circular head 8 having an internal flange which is rabbeted to the corresponding surface of the turbine and apparatus ripen of, the member between heads is substantially rectangular, the greatest dimension of which is vertical to resist vertical stresses. The top of the member is closed by a removable cover 9, which is bolted to said member and also to the right hand head. This coyer ,is
arched to increase its strength and is alsoprovided with transverse stiffening ribs 9 located on opposite sides of-the driven gear and which also serves to confine the lubrica'ntto .the gear containing chamber. The
member also has side openings closed by cover plates 10 and ll to permit access to the gears.
its ends, each wall having a shaft opening with a removable. cover 13 to confine the lubricant to the gearchamber, It is also provided'with transverse webs ll and 15 which, in addition to bracing the member, also serve as supports for the bearings.
There are also fore and aft ribs 15 which are united with those extending across the member to further strengthen the structure.
The arrangement of the bearings is important as much" depends upon the accuracy with which they are made and upon their exact positions and their capacity for ad- 'lar;,\a1 d scription of one of them will sufiice. Tlieiweb 15 has, generally speaking, a U- shaped opening, and atthe' bottom is prothe opposite side. Between thecasings of thereby. 'Such a joint, while simple in construction, is very strong. Thecross-section l The bridge member or suspended gear box f is braced by transverse walls 1:2. located near mamas for the short lower driving shaft. In hori- I shaft is lubricatedby .oil rings that engage the upper surface thereof and dip into the oil in the. chamber below.
The bearing .18 for the low speed or driven shaft is supported from above and is so arranged that it'can' be removed with the shaft when necessary or desirable. The bearing is held in. place by a cross-member 19 which forms a seat therefor. The ends of the member are seated on large flat shoul ders :20'formed at the upper end of the U- shaped web or rib. It is also to be noted that the vertical legs of the web extend from the bottom to practically the top of the bridging member orgear box't-hereby increasing the stifl'ness of the structure. Between the cross-member and said fiat surfaced shoulders thin shims may be readily inserted to change the vertical distance between the shaft centers in order to adjust the relation of the teeth of the driving pinion 21 and driven gear 22. In order to provide for lateral adjustment the cross-member 19- has down turned ends and between said ends and shoulders on opposite sides ,of the web are located long and relatively thin wedges :23 so that, by slightly easing the wedge or wedges on one side and driving in the other or others on the opposite side, the bearing support, and hence the bearing, can be moved bodily from one'side to another by the necessary amount. Instead of wedges 7 metal strips of difi'erent thickness may be employed; The bolts 24 which secure the member in place have a small clearance between their bodies and the walls of the receiving holes to permit of this adjustment. The cap :25 for the bearing 18 is located below it so as not to interfere with the adjusting devices. It is supported wholly bv the cross-member, being separated from the web by small clearances. To assemble the gears the pinion and its shaft are first mounted in place with the bearings and then the driven gear and its shaft and'bearings. To disassemble the reverse operation is ,fol lowed. y
The pinion. which may be of any suitable construction both as to body and tooth formation, is mounted on a short shaft which is connected to the turbine shaft 26 by aflexible coupling 27 of any'suitable construction. The driven-gear. whichalso may be of any suitable construction both as to body and tooth formation, is mounted on a short shaft which is connected to the shaft 28 of the generator or other apparatus by a solid or flexible coupling :29, as occasion demands.
In the lower part of the geaiwbox is a chamber containing lubricant, the ribs and webs being provided with openings, such as 30, to permit oil to freely flow from one place to another. To keep a constant level a darn 31 is provided from which oil flows from the main supply to the sump 32 from which itis drained back to its source. Ow ing to the character of the figures the sup ply pipe for the oil is not shown. I have notspecifically illustrated the means for lubricating the bearings of the shaft of the driven gear because this can be done in a variety of ways.
In some cases it is necessary or desirable toemiploy thrust bearings for one or both gears which also serve to position the rotors of the turbine and generator. In
the present case, the turbine shaft is provided with a thrust bearing 33 and the generator or driven shaft with a thrust bearing 34. 'Both of these hearings are of a character to limit the motion in either direction, and being old and well lmownhave not been specifically illustrated or described. In illustrating my invention I have shown an elastic fluid turbine arranged to drive an electric generator but it is evident that a pump, or compressor may form the driven apparatus. Also in other cases I may drive the low speed shaft by a turbine and cause it to rotate the other element of the system at a higher speed.
In ac'cordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together a with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is" only illustrative, and thatthe invention can be carried out by .other' means.
What I claim as new and desire to se cure by Letters l'atent'of the United States,
1. In combination, arr-elastic fluid turhim, an apparatus driven thereby, shafts for the turbine and apparatus, a bridging member which is suspendedbetween and supported by the casings of said turbine and apparatus, and gearing between the shafts which is wholly supported by said member.
2. In combination, an elastic fluid turbine, an apparatus driven thereby, shafts for the turbine and apparatus, a member which forms a bridge uniting the turbine and driven apparatus, said member being suspended between and supported by said turbine and apparatus, gearing between the shafts, theaxes-of said gears being located rat-us driven thereby, main shafts for the turbine and apparatus which are located in the same vertical plane, a suspended bridge member which unites the turbine and apparatus, short shafts which are united-With the main shafts and are located one over the other, gearing between the short shafts,
and bearings for the short shafts which gresupported wholly by the bridge mema In combination, a turbine, an appa-. ratus driven thereby, shafts for the turbine and apparatus, a suspended bridge memher which unites the turbine and apparatus, said member being hollow and provided with cross-ribs for stiffening it, gears for transmitting motion from one shaft to, die
other, which are located one above the other within the member, shafts for said gears,
'and bearings for the last named shafts which are supported by the cross-ribs.
5. In combination, a turbine, an apparatus driven thereby, shafts for the turbine and apparatus, a suspended bridge member which unites the turbine and apparatus,
said member being hollow and --provided with transverse walls near its ends through which the shafts extend and also withinternfil' supports, gearing for transmitting motion from one shaft to the other, shafts for, said gearing, and bearings for the gearing shafts which are carried by said internal supports.
6. In combination, a turbine, an apparatus.
driven thereby, shafts for the turbine and apparatus, a suspended bridge member which unites the turbine and apparatus, said member being hollow and provided with a pair of webs or ribs each having a U-shaped opening therein, gearing for transmitting motion from one shaft to the other, shafts for said gearing, bearings for the gearing shafts arranged in sets, one set of bearings being mounted in the bottoms of said openiiigs and the other set located at the top and in vertical alinement with the first set.
7. In combination, a turbine, an apparatus driven thereby, shafts for the turbine and apparatus, a suspended bridge member. which unites the turbine and apparatus, said member being hollow and provided with a pair of vertically ,dispo'sedwebs, each of which has a seat atitslower end and tinished surfaces at its upper end, gears for transmitting motion from one shaft to the other located one above the other, shafts for. said gears, bearings for the lower gear shaft which engage the seats, and bearings for the upper gear shaft which are supported by said finished surt'aces.
35 j the other whose axes are in the same vertical 8. In combination, a turbine,'an apparatu driven thereby, shafts for'the turbine an apparatus, a suspended bridge member which unites the turbine and apparatus, said member being hollow and provided with. a
pair of vertically disposed webs, each, of
which has a seat at its lower end and shouldered surfaces at upper end, gears for transmitting motion from. one shaft to the other, shafts for said gears, bearings for the lower gear shaft which are-supported by the lower part of said webs,-bearings for the upper gear shaft-s which are supported on the shouldered surfaces by cross-members having overhanging ends, and vmeans cooperating with the shoulders and overhanging ends to adjust the bearings sidewise.
9. In combination, a turbine, an apparatus driven thereby, shaft-s for the turbine and apparatus, a hollow suspended bridging member which unites the turbine and apparatus, said member being braced internally by webs, an archedcover .for the.member which is rigidly bolted thereto and forms a part of the gear casing, gearsfor transmitting motion from one shaft to the other located within the member, shafts for said gears, and bearings for the gear. shafts supported by the member.
10. ,In combination, a turbine and apparatus driven thereby. shafts for the turbine and apparatus, a hollow suspended bridging member. which has enlar ed circular heads boltedto the turbine an apparatus, gearsfor-transmitting motion from one shaft to driven memos plane, shafts for said gears, bearings for the 'ings in the member which are alined with the main shafts, couplings between the main and short shafts locatedwithin the member, and gears on the short shafts for transmit ting mot-ion from one to the other.
12. In a ,geared turbo-generator set, the combination ofa turbine casing having supporting feet, a generator easing having supporting feet, a combined bridge and gear box supported in suspension between said casings, said bridge "and casings forming a rigid frame for the set, bearings carried by the gear box, vertically alined shafts in said i bearings, and reduction gearing carried by Said shafts.
13. In a geared tu rho generatorse't, the
combination of a turbine casing, a generator casing, a comblned bridge and gear box carried insuspension between them and forming therewith a rigid frame structure, and
a driving pinion and a driven gear arranged in said gear box with their shafts in vertical alinement and with the pinion below the gear. In witness whereof, I have hereunto my hand this 21st dayof May, 1915.
RIGHARD H; RICE.
set
US3036815A 1915-05-25 1915-05-25 Geared turbine-driven set. Expired - Lifetime US1155163A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333358A (en) * 1979-12-18 1982-06-08 Fiat-Allis Macchine Movimento Terra S.P.A. Power-shift countershaft type transmission
US4616526A (en) * 1983-02-26 1986-10-14 Toyota Jidosha Kabushiki Kaisha Transmission device housing construction with shaft lubricating oil shield cover generating lubricant pool
US5600905A (en) * 1995-02-03 1997-02-11 Harnischfeger Corporation Dragline with improved pinion shaft mounting
US5603174A (en) * 1995-02-03 1997-02-18 Harnischfeger Corporation Dragline including improved walking mechanism
US11226031B2 (en) * 2016-11-30 2022-01-18 Zf Friedrichshafen Ag Drive assembly for a vehicle, and vehicle comprising the drive assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333358A (en) * 1979-12-18 1982-06-08 Fiat-Allis Macchine Movimento Terra S.P.A. Power-shift countershaft type transmission
US4616526A (en) * 1983-02-26 1986-10-14 Toyota Jidosha Kabushiki Kaisha Transmission device housing construction with shaft lubricating oil shield cover generating lubricant pool
US5600905A (en) * 1995-02-03 1997-02-11 Harnischfeger Corporation Dragline with improved pinion shaft mounting
US5603174A (en) * 1995-02-03 1997-02-18 Harnischfeger Corporation Dragline including improved walking mechanism
US11226031B2 (en) * 2016-11-30 2022-01-18 Zf Friedrichshafen Ag Drive assembly for a vehicle, and vehicle comprising the drive assembly

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