US2379839A - Adjusting device - Google Patents

Description

July 3, 1945. A. J. STEPANOFF Q 2,379,839

ADJUSTING DEVICE Filed Oct. 22, 1942 69 3 4;? 40 50 as 64 I 47 96% 3'1 27 ,61 AZ L Tmi J BY I I] HIS ATTORNEY Patented July 3, 1945 UNI D S wto lngersoll -RandsCompany,New Yoik, N. Y., I

3 a cor i or ation of New Jersey I nppiieati noember22,1e42, shimmer-452,919 e a a i a 7 se ms; I This invention relatesto pumps; and more particularly to "an adjusting, device for selectively varying the pitch ofthe vane'sof a rotary pump and; forindicating" the relative positions of the partsthrough whichmovement is' transmitted to h fis for adjusting, them;

"One object oftheinvention is to prevent unnecessary wear on tl'ierelativelyrotary and nonrotary cooperating elenients' thi'bngh which force is transmitted to the vanes'for changing their angularpitch. t I

Anotherobject istoenable thei'elative positions of such cooperating?rotaryfandnomrotary elements tobe conveniently indifiate'd Et't remote point.

Other objects w i lllbe inpartfohviousand in part pointedout hereinafter;

In the drawing accompanying this spcifi'ca tibnandin whieh similar referenceniimermsrefer to similar parts; i

Figure l is an elevatibn" of acentrifu'galpump of a type to which the invention may be advan tageously applied' andfa io und ation shown; in fsection, to-supportthepump, i Figure: 2 is an elevation, partly in section, of an enlarged view of a portion ofthepuhip-ilhxs- I Figuree is an elevation; partly insedtioh, taken throughFigure 1 ontne 'line' 4 1; and" Figurefi is a side elevation of edema taken on the line 55 in Figuree and looking in the direction indicated bytheariows." a Referring more particularly'to the drawing and at first to Figure 1, the pump designated, in gen- "eral'; by 20 is of the vertical axial flo'w typeshown extending intoa pit/21 defind' b y a; foundation 12 for piiniping'liquid 23.

On airinter ediate porti n bf the casing" 2'4 of thepumpis'an exter'naifiarige 25* that seatsupon the foundation22 to support the pump; and on a the u per end of the pump casingflf iseimdtor 26, only a portion thereof being shown, forcdiiving the rotatiire parts Ofthe 20.

The lowere'nd' of the pump easing 24 is flared outwardlyto define. a wide inlet opening 21 for the admission of liquidint'onthe' casing 24, and

ing-the discharge fluid from the pump. 3

Withinthe casing 24 are upperand lower bear,

ing members ZSendbWthai-g are arranged ooax all withm theeasifiQafid with respect to each n (on ire-s9 otheitand are cefineeiea w t bei' ea teaeeam aperturee to that are ihexiaian n"- iiia-tieliow biotin 5U siidahie casing.

21 n v thereto, as by means of a key 58, a hand wheel 59 for rotating the nut.

Threadedly connected to the nut is a rod 68 that extends downwardly along the exterior of the pump casing and has its lower end pivotally connected to a lever 6| that lies across the flared I opening of the pump casin 24 and has its other end pivotallyconnected to a lug 62 on said pump The intermediate portion of the lever (ii is pivotally connected to a rod the bearing member 30.

t3 slidable in The upper end of the rod 83 extends into the lower end of the block 58 and carries a thrust bearing 64 of the anti-friction type which lies in a recess 65 in the lower end' of the block '58 On one edge of the outermost clampingplate 18 is apointer 82, and suitable indicia 83 are inscribed upon the surface 8| for cooperation with the pointer 82 to indicate degree of pitch of the vanes. Preferably, an adjustable seating surface is provided for the pin 12 on the shoe I3 in the form of a screw 84 threaded into the plate 15 to project with its lower end into the path of the pin 12. r

the rod 60 is raised or lowered by rotating the @hand wheel 59;. This movement of the rod is and serves to transmit the thrust of the rod 63 to the block 50 for elevating and lowering the said block. The inner race 68 of the anti-friction bearing 64 seats upon a shoulder 61 on the rod 63 and is clamped thereagainst by a nut 68 threaded upon the rod.

'Iheanti-friction bearing 84 is of ,less length than the recess 65 and the upper and lower end surfacesof said recess constitute seating surfaces 69 and 18, respectively, against which the adjacent ends of the outer. race ll of, the antiefriction bearing may abut,,accordingly as the rod 63 is moved upwardly or downwardly for rotating the vanes 33 in the desired direction. The recess 65 is, moreover, of sufliciently larger diameter than the outer race lluto prevent contact between the peripheral surface of the race 'II and the block 58. will be readily appreciated the block 58, being interlockingly connected with the shaft 32, must constantly rotate with the shaft during the operation of the pump and inasmuch as the antifriction bearing is carried by a non-rotary mem. beri it is ,desirable that the said anti-friction bearing be normally maintained out of contact with the seating surfaces 59 and 10 in order to prevent needless Wear on these elements. It is for this reason that the recess 65 is so: proportioned that the anti-friction bearing may be placed in a neutral position therein so that it will be entirely out of contact withtheblock 50 afterfthe adjustment of the vanes 39 has been effected. 1 a

Inasmuch as the anti-friction bearing 64 is located withinithepump so that its position with respect to the seating surfaces 69 and I0 may not be observed by theoperator it is, moreover, desirable that means be provided exteriorly of the pump to indicate the position of the antifriction bearing with respect to the seating sur- 12 with respect to both plates. The plates 15 and I 16 are held thus' by clamping plates '11 and 18 that are connected'to the plates 15 and 18 by screws 19 and respectively engage the inner and outer surfaces 88 and BI of'the portion of the casing 56'defining the slot 14. The plates 15 and 76 are so proportioned :that when'the clamping plates Ti and 18 are secured firmly thereto, the latter plates while'readily slidable on the surfaces so and 8 l .will"exert a binding effect thereon for holding the shoe '13 against unauthorized move- "ment inthe slot 14.

' transmitted by the lever 6| to the rod 63 to force the outer race Hv against the seating surface 69 I or the seating surface 10 for elevating or lowering the block 50, depending upon whether it be invanes 39, and during the axial movementof the rod 88 in either direction the shoe will be moved.

endwise of the slot 14 by the pin 12. 'The pin 12 will then engage either the screw 84 or the upper surface of the plate 16 for actuating the shoe upwardly or downwardly. I a

Thus,lif, for example, it be intended to elevate the block 58the hand wheel'59 isrotated in a direction-to cause the rod 68 to move upwardly. The rod 63 will thereby also be caused to move upwardly to bring the outer race 'H'againstthe seating surface 69, and continued movement of the rods 68 and 63 in this direction will cause the block 58 to be moved upwardly and tilt the vanes 39. i V

During the upward movement of the rod 60 the pin 12 engagesthe end-of the screw 84 and carries the shoe 13 upwardly in the slot 14, and with the screw 84 in a correct position of adjustment the distance between the pointer 82 and the axis of the pin 12 will be directly proportion-- a slightly until the pin 12 coincides with the pointer 82 the anti-friction bearing will be. moved into a position in which the outer race H is out of contact with the block 50, and the bearing 64 will, therefore, be protected against such Wear as it would otherwise receive ifit were permitted to rotate constan-tlyjwith the pump rotor.

1. In an adjusting'device, the combination of a pump casing and a shafttherein, vanes connected rotatab ly to the shaft, means rotatable with the shaft and movable relatively thereto for rotating the vanes to vary their impelling effect, a thrust bearing reciprocable longitudinally of the shaft into engagement with 'saidmeans to transmit pressure forv actuating the said means and being movable out of contact with the said means to selectively prevent the rotation of the thrust bearing with said means, and means located exteriorlyof the casing for indicating the position of the thrustfbearing with respect to .the

first-mentioned means.

2. In anadjusting device, the combination of a pump casing and a shaft therein, vanes connected rotatablyzto. the shaft,.meansrotatable with the shaft. and reciprocable with respect thereto to rotate the vanes for varyingthe capacity Of a pump, a reciprocatcry supp rt bearing in the casing,,a thrust,. membcr ,carriedby the support bearing forengagement with said means to transmit pressure from the support member to said means for rotating the vanes and being movable out of engagement with the said means to selectively prevent the rotation of the thrust bearing with said means, linkage for effecting the reciprocation of the support member, and

means associated with the linkageand located ata point remote from the thrust bearing to indicate the position of the thrust bearing with respect to the first-mentioned means 3. In an adjusting device, the combination of a pump casing and a shaft therein, vanes connected, rotatably to the shaft, means rotatable withthe' shaft and reciprocable with respect thereto to rotate the vanes for varying the capacity of a pump, a pair of abutments carried by said means, a reciprocatory thrust bearing selectively engageable with the abutments and acting to transmit pressure thereto for actuating the said means to rotate the vanes and being movable into and out of contact with the abutments, said thrust bearing being movable into non-contacting position with respect to the abutments, linkage for effecting reciprocatory movement of the thrust bearing, and means associated with the linkage to indicate the position of the thrust bearing with respect to the abutments.

4. In an adjusting device, the combination of a pump casing and a shaft therein, vanes connected rotatably to the shaft, means rotatable with and reciprocable relatively to the shaft for rotating the vanes to vary the capacity of a, pump,

a pair of opposed abutments carried by the said means, a thrust bearing reciprocable longitudi-j I nally of the shaft between the abutments to selectively engage the abutments and acting to transmit pressure thereto for actuating the said means, said thrust bearing being movable into a noncontacting position with respect to the abutments, linkage for actuating the thrust bearing relatively to the abutments, and means associated with the linkage and located at a point remote from the thrust bearing for indicating the position of the.

thrust bearing with respect to the abutments.

5. In an adjusting device, the combination of a pump casing and a shaft therein, vanes con nected rotatably to the shaft, means rotatable with and reciprocable longitudinally of the shaft for rotating the vanes to vary their impelling effect, a pair of opposed abutments carried by the said means, a thrust bearing selectively movable longitudinally of the shaft into engagement with the abutments and acting to transmit pressure thereto for actuating the said means longitudinally of the shaft, said thrust bearing being movable into ta non-contacting position with respect to the abutments, linkage for actuating the thrust bearing relatively to the abutments, and indi eating means exteriorly of the casing and op erated by the linkage for indicating the position of the thrust bearing with respect to the abutments. I

ALEXEY J. STEPANOFF.

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