US1172335A - Machine for blading turbine-rotors. - Google Patents

Description

J. WILLIAMSON.

MACHINE FOR BLADING TURBINE ROTORS.

APPLICATION FILED JULY 23, 1914.

1,172,335. Patented Feb. 22, 1916.

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MACHINE FOR BLADING TURBINE ROTORS.

7 APPLICATION FILED JULY23|1914.

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' ATTORNEYS Patented Feb. 22, 1916.

J. WILLIAMSON.

MACHINE FOR BLADING TURBINE ROTORS- APPLICATION HLED JULY 23, I914;

Patented Feb. 22,1916.

- INVENTOR wnusssss 4 ATTORNEYS- cairn s'ra ns- PATENT carton.

Jar/ ns WILLIAMSON, or Nev/roar mews,- VIRGINIA.

. MACHINE FOB BLADING TURBINE-BOTORS.

Application filed July 23, 1914. Serial No. 852,713.

To all whom it may concern:

Be it known that 1, JAMES WILLIAMSON, a citizen of the United States, residing at Newport News, county of Warwick,- State of Virginia, have invented a new and useful lillachine for Blading Turbine-Rotors, of which the following is a specification.

My present invention consists of a novel machine which is especially designed for insorting the blades and distance pieces in the rotors of turbines, whereby the blades and distance pieces are assembled with respect to the rotor in a very expeditious manner and with a minimum amount of time and labor.

It further consists of a novel construction and arrangement of a motor which'is connected in a novel manner with respect to a novel construction of a cross-head.

It furtherconsists of a novel construction of a blade or hammer and novel means for operating the cross-head to cause said blade or hammer to travel in parallelism with the groove of the rotor in which the blades are to be inserted. i

It further conslsts of a novel construction and arrangement of guides;

Other novel features of my invention will more clearly hereinafter appear in the detailed description thereof.

For the sake of illustrating one manner bled condition with respect to a sectional view of a rotor. Fig. 2 represents a sectional elevation of a portion of a rotor and a blade in conjunction therewith. Fig. 3 rep resents a frontelevation of my novel machine. Figat represents a sectional elevation of a portion of my device. Fig. 5 represents an end elevation of a cross-head. piston-rod, and certain of their adjuncts. Fig. 6 represents a section on line wm of Fig. 45. Fig. 7 represents a sectional elevation taken through the cross-head. Fig. 8 represents a sectional elevation of the motor. Fig. 9 represents a 1 longitudinal section of the valve mechanism;

Fig. 10 represents a transverse valve mechanism. i

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings :1 designates a frame-work or casing, the contour of which may vary widely in practice, and in said cassection of the ing is journaled, in any desired manner, the

trunnions 2 carried by the motor-cylinder 3, which latter is provided with a cap or-clo- Specification or Letters Patent. Patented Feb. 22,1916.

sure 4 secured thereto by means of fastening devices. 5. The closure 4:18 provided with a recess 6 and a groove 7,..whi'ch latter communicates' with a passage 8, saidpassage communicating ,Wllih a conduit 9. leading to a valve-mechanism 10; Theloore 11 of themotor has mounted therein a reciprocating piston 12, the piston rod 13 of which passes. through a closure 14, which covers the for-' ward end of the casing-or'cylinder 3, the latter being flanged, as best seen inFig. 8, whereby the arms of a guide-bracket 15 are secured to the-end of said cylinder3 by means of fastening devices 16, which latter also pass through'the closure 14 and the flanged end of the cylinder 3.

K 17 designates a stufing-box carried bythe closure 14 in any desired manner. 7

1S designates a groove in the closure '14:

which communicates with a. passage 19 in the cylinder 3, said passage. 19 also communicating with a conduit 20, which leads to;

the valve 10. The valve lOis provided with a ,main'inlet' port 21, which is adaptedto be connected inany desired IDEIIIHBIVJCO the motive fluid supply and any desired type of motive fluid may be employed, one example of which is compressed air.

The valve body is provided with a conical seat 22, with which engagesthe conical wall of the valve-plug 23, theshank of which is providedwith a flanged sleeve 24, which is retainedvin place by means of'a cap 25 in threaded engagement with the valve body. I

The valve plug is provided with a longitudinally extending passage 26 which communicates wlth a transversely extending passage 27, which extends through the wall of the valve plug and is adapted to 'registerwith a port 28, which communicates with the con duit 20, or with the port 29, which communicates with the conduit 9. The side wall of the valve plug is recessed as at 30, in order that the port communicating withthe chain.-

ber formed by suchrecessed portion of the valve will alternatelycommunicate with the exhaust port 31.

In order to limit the rotation of the valve plug, the inner end thereof is recessed, as at 32, thereby forming the walls 33 and 34, which are adapted to contact w1th a stop 35,

- comprising in the present instance, a bolt in threaded engagement with the valve body, and provided with a lock nut 36. The stem of the valve plug is preferably faced off in order to receivea suitable actuating wrench c r 07. The valve body is provided with the apertured extensions 37 in order that it may.

be secured to a suitable support, and in the present instance,-this support is formed by brackets 38 carried by the frame-work 1 in any desired manner, and having their outer ends connected by means of a bolt and nut 89.

The piston-rod 13 is connected to a crosshead 40'by means of a cross-head pin 41. carried by said cross-head. The cross-head pin. 41 passes through a journal bOX- 4C2,

which latter is secured to the flanged outer end of the piston rod 13 by means of fastening devices 43 of' any desired type. The

' cross-head 10 is recessed on opposite sides, as

indicated at 44, and is provided with gibs 45, which are secured in position by means of fastening devices d6, and the inner faces of said gibs slide on the guides 47, which are secured to the side brackets 38 by means of fastening devices' lS. The engaging faces of said gibs and guides are concentric to the grooved?) of a rotor 50, in which the turbine blades 51 and the distance pieces 52 are to be insertechand said groove is cut away, as at:

53, in order that the blades and distance pieces may be inserted therein. In practice,

a plurality of slots, such as 53, are formed,

so that after the turbine blades and dis tance pieces havebeen inserted and assemwhich is retained in position by means of a set screw 56- The operation of my novel machine for blading turbine rotors will now be readily apparent to those skilled in this art, and is as follows The machine and the rotor are arranged in such a manner that the groove 49' and the side walls of the guides 47 are concentric to each other. Assuming that the piston 12 is at the rear end of the cylinder of the motor, a desired number of the turbine blades and distance pieces are inserted. through. a slot or opening 53 into the rotor: groove, the tool 55 being positioned in rear, The opof the blades and distance pieces. erator then actuates the valve plug 23 to brin the passage 27 into register with the port 29, whereupon live motive fluid "may pass through the conduit 9,passage 8, and

groove 7,'into the-piston chamber 11, inrear of the piston 1 and cause the same to move for ardly. TlllS causes the cross-head 4-0 to be'inoved forwardly and the bar 55 will impart a uniform pressure to the blades and distance pieces which have beeninserted,

until the-forward one abuts againsta stationary-stop, which has been. previously located in a groove 19.

of a circle, owing to the novel manner in which the cross-head is guided. The ex-.

' During this forward movement, the forward end of the tool 55 is seated in the groove 49 and moves in the are haust in front 'ofthe piston v12 takes place through the passage, 19, conduit 20, port :28 Y of the valve casing chamber 30, and exhaust port 31. The valve plug'23 isthen rotated to permit the live motive fluid-to pass' through the passage 27,- port 28, conduit 20,

and into the piston chamber .11 in front of the piston 1'2'and cause the same to be moved rearwardly,'the exhaust in rear of the piston talnngplace through the groove 7, passage 8, conduit 9, port 29 of the, valve, casing chamber 30 and exhaust port 31.

In the methods heretofore employed for.

securing turbine blades and-distance pieces in grooves or rotors, the distance pieces and turbine blades have been inserted separately into a groove and CfllliQ't-l in place by hand, the result of which is that rectifying of the blades and distance pieces is necessary, and

such operation is expensiveas it involves a considerable amount of manual labor {and time. 7

In accordance with my present invention any desired number of blades and distance pieces may be inserted in a turbine groove,

and simultaneously pressed into position, or' upset within a groove,th1s result being accomplished by actuating the valve handle 57.

A wedge is first inserted in the groove to form an abutment for the firstbladeyand after the blades and distance pieces have been secured in the groove in proximity to one of the slots 53, the rotor 50 is partially rotated in order to bring the next slot 53 into the proper position for the insertion of additional turbine blades and distance pieces,

and so that'the tool 55.when at the endofi its rearward stroke, will be in rear of the slot 53. The operation is thus repeated until an'entire turbine groove is filled, it being understood that the wedge is removed and the space filled with turbine blades and distance pieces to complete, the ring or crown of blades.

In accordance with my present invention, there is no likelihood of the binding of the blades and distance pieces, while being advanced or'moved forward bythe tool or impact member, which is reciprocated by the piston,- since, although the piston and piston rod are reciprocated in a rectilinear path. the tool or impact blade and the cross head are reciprocated in a curvilinear path, which is concentric to a turbine groove.

Special attention is directed to the novel manner in which the pressing tool is supported and'guided'during its reciprocating travel, so that its pressure is exerted in a curvilinear direction.

I am aware that it has heretofore been Proposed to employ a Dressing tool which is reciprocated in a path substantially tangential to a turbine groove, but my present invention is clearly differentiated from such a construction, since the pressing tool in my invention is reciprocated in a curvilinear path, substantially concentric with the turbine groove, the free end of said tool traveling in a circular path having the rotor axis as its center, and to none of the constructions of the prior art do I herein make my claim.

It will now be apparent that I have devised a novel and useful construction of a machine for blading turbine rotors which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description, and while I have. in the present instance, shown and described a preferred embodiment thereof which will give in practice satisfactory and reliable results, it is to be understood that the same is susceptible of modification in various particulars within the scope of the appended claims without departing from the spirit or scope of the invention or sacrificing any of its advantages.

Having thusdescribed my invention, what I claim as new and desire to secure by Let ters Patent, is 7 1. A device for securing blades in turbine grooves of rotors, comprising a crosshead, means to reciprocate said cross-head in a curvilinear path concentric with a turbine groove, a tool fixedly carried by said cross-head and adapted to extend into a turbine groove whereby said tool is caused to travel in a path concentric with the axis of the rotor.

2. A device for securing blades in turbine grooves. comprising a stationary frame, a reciprocating motor pivotally mounted thereon, cross-head operatively connected with said motor, a tool carried by said cross-head, reciprocating means for said motor, and guiding means for said cross-head to cause the free end of said tool to travel in a path concentric with a turbine groove.

3. A device for securing blades in turbine rooves com risin a stationar frame a reciprocating motor pivotally mounted thereon, and having a piston rod, a, crosshead pivctally connected with said rod, 2. tool. carried by said cross-head, means to recipr cate said piston rod in a rectilinear path, andmeans to guide said cross-head in a curvilinear path.

4; A device for securing blades in turbine grooves, com rising a stationary support,

a reciprocating mctor pivotally mounted thereon, and provided with a reciprocating piston and piston rod, a guide for said piston, means to reciprocate said piston, a cros's-headmovably connected wlth said piston rod, a tool carried by said cross-head and.

extending into a turbine groove, and means to guide said cross-head to cause it to travel in a curvilinear path concentric with said groove. I

5. A device for securing blades .in turbine grooves, comprising a motor consisting of a casing pivotally supported, a piston in said casing and a piston rod, a cross-head pressing tool so that the end thereof will travel on the circumference of a circle of a different radius about the axis of the rotor. V

7 A device for securing blades in turbine grooves, comprising a cross head having an, aperture extending laterally there-..

through, a tool in said aperture, means to fix said tool in adjusted relation with respect to said cross head, means to reciprocate said cross head, and means compris ing a curvilinear guide for said cross-head and adapted to cause said'cross head to reciprocate in the arc of a circle.

8. A device for securing blades in turbine grooves, comprising side brackets, guides secured thereto,,and having their side faces curved to form guides, a cross,

head having recesses in the sides thereof, wear plates secured to said cross head and having curved faces to engage said guides, a tool laterally adjustable in said cross head, and means to reciprocate said cross head. v

9. A. device for securing blades'in turbine grooves, comprising a cross head having an aperture therethrough, a tool adjustable in said aperture, a fastening device carried by said cross head and enmovaoiv connected with said piston, means.

to control admission to and exhaust from opposite sides of said piston. of motive fluid, a 1:001 carried by said cross head, and means to cause said pressing tool to travel on the I circumference of a circle having lts center on the axis of the rotor.

11; A device for securingbiades in turbine grooves, comprising a cross head having opposite sides thereof recessed, Wear piates'located in said recesses, guides having curved guiding faces on opposite sides-thereof, with Which said Wear plates engage, means to: adjust said Wear-plates- With respect to said guides, a tool carried by said cross head, and; actuating means for said tool.

JAMES WILLIABLISON.

Witnesses:

GEO. A. PAEKER,; WILLIAM BURLIN GHAM'.

Copies of this patent may be obtained for five cents each, by addressing the commissioner of Patent Washington, D. G. i

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