Improvements in and connected with Bearings for Rotary Blowers.
Year: 1894

page_text: Date of Application, 11th Sept., 1894-Accepted, 20th Oct., 1894
COMPLETE SPECIFICATION.
Improvements in and connected with Bearings for Rotary Blowers.
I, WILLIAM WARREN WAINWRIGHT, of Connersville, Fayette County,
Indiana, United States of America, Engineer, do hereby declare the nature of
this invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
In rotary blowers, such as the well known Roots blowers, it is desired that pro-
vision be made at the journals of the revolvers for compensating for the wear of
the journals and their bearings, and for adjusting the axes of the bearings into
normal line as wear takes place and for preventing the leakage of air etc. at the
journals under pressure.
The present improvement relates to such provision.
In the accompanying drawings
Fig. 1, is a side elevation, part vertical section in the plane of line a of a blower-
bearing exemplifying the present improvements:
Fig. 2, an end elevation of the packing gland, the bearing-support appearing
partly in vertical section in the plane of line b:
Fig. 3, a vertical longitudinal section in the bearing proper:
Fig. 4, an end elevation of the bearing proper:
Fig. 5, an end elevation of the bearing-sleeve, detached:
Fig. 6, a side elevation, part section in the plane of line c, of one of the packing
screws and a portion of the packing gland engaged by it.
In the drawing :—
A, indicates one of the head plates in an ordinary rotary blower:
B, a bearing-support connected with the head-plate as usual, and bored
cylindrically in the axis of the shaft :
C, the shaft:
D, the gap or space formed between the head-plate and the inner end of the
bearing-support B:
E, the packing box formed in the head-plate around the shaft:
F, the packing-gland engaging the packing box, and having ears for the
packing-screws, this packing-gland being split into two halves in a line cutting'
through the two ears at the packing-screws:
G, threaded lugs upon the bearing-support B to receive the packing-screws:
H, packing-screws threaded into the lugs G and presenting their heads against
the ears of the packing-gland, their heads being counter-bored where they go
against the ears of the packing-gland:
I, bosses formed upon the outer face of the packing-gland, these bosses being
cupped over by the counter bores of the heads of the packing-screws, the dividing
split of the packing-gland passing diametrically through these bosses:
J, studs upon the inner end of the packing-screws engaging loosely in holes in
the ears in the packing-gland.
It is highly desirable that the journal-bearing of the shaft be kept as close to
the head-plate as possible. This leaves very little room at D for the manipulation
of the packing-gland, and notwithstanding the packing-gland is made as short as
possible, there is no room to withdraw it directly outward to insert the packing.
But in the improved construction the split packing-gland permits the entire removal
of the gland side-wise in two portions when the packing is to be inserted, and when
the gland is in place and the packing-screws in action, then the packing-screws,
with their counter-bores engaging around the bosses, hold the gland-halves
together.
.)

page_text: Iroceeding with the drawing
-
K, indicates a bearing-sleeve which engages the journal of the shaft, this sleeve
being tapered at each end and being cut longitudinally through one side so that it
can be contracted upon the shaft :
L, a pair of adjusting-sleeves bored to fit the tapers upon the ends of the bearing-
sleeve K and having their peripheries fitting the bore of the bearing-support B,.
these adjusting-sleeves L being split longitudinally into separate independent
segments:
M, adjusting screws which engage a segment at each of the adjusting sleeves and
serve as means by which the segments may be drawn endwise toward each other:
N, the cut heretofore referred to as extending through the bearing-sleeve K and
permitting it to be contracted under the influence of the wedge-like adjusting
segments and
O, longitudinal cuts in the periphery of the bearing-sleeve K extending inwardly
a, sufficient distance to weaken the bearing-sleeve and permit of its more easy
contraction upon the shaft.
By turning all of the screws M equally, the bearing-sleeve K may be contracted
to fit the shaft as the parts wear away and the shaft will remain in former axial
position. Should the weight of the revolving parts or the thrust of the gearing
employed tend to produce one-sided wear in the bearing, thus throwing the shaft
out of normal axial position, then in that event, the shaft may be restored to
normal axial position by adjusting the screws M unequally thus giving more effect
to one set of the wedges or segments, than to the others, the result being that the
axis of the shaft may be shifted as desired.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-