US1972780A - Balanced variable delivery pump or blower - Google Patents

Description

sept. 4, 1934.

u l. B. LAsKowlT'z BALANCED VARIABLE DELIVERY PUMP OR BLOWER 3 Sheets-Sheet 2 Filed Feb. 1e, 19:51

INVENToR'.

ATTORNEY Sepp, 21934. i. s. LAsKowlTz BALANCED VARIABLE DELIVERY PUMP OR BLOWER Filed Feb. 1e. y1951 s sheets-sheet 5 i NVENTOR les Patented Sept. 4, 1934 I BALANCED VARIABLE DELIVERY PUBIP OR BLOWER v Isidor B. Laskowitz, Brooklyn, N. Y. Application February 16, 1931, Serial No. 516,251

Claims.

The present invention relates to improvements in pumps or blowers and more particularly to that type of pump or blower wherein the delivery or discharge of the iiuid may be varied 5 from a maximum to zero, with the motor, engine or other prime mover operating at a constant speed. A further, and important object is to provide a pump or blower construction wherein the de# 210 livery'or discharge may be reversed and the quantity of flow varied from the maxmumto Zero in the reverse direction, with the motor, engine or other prime mover operating at a constant speed and in the same direction as before the reversal of the vdelivery or discharge.

Another important object is to provide a pump or blower construction that is statically and dynamically balanced so as to reduce the effort required to operate the mechanism for varying the delivery or discharge of the pump or blower. A further object is to provide a structure of the above mentioned character that includes a casing having alined inlet and outlet openings, oppositely rotating propellers being arranged centrally within the' casing, the propellers being mounted upon a. swingable housing, the actuating means for the latter being located exteriorly of the casing, whereby the propellers may be .positioned in any desired angular position so that the thrust may be caused to act in an inclined direction. A further and salient object of the present invention is to provide a balanced variable delivery pump or blower of the above mentioned character' that includes a pair of oppositely rotating propellers or impellers mounted for rotation Within the casing and being further adapted to be positioned at any predetermined angle of inclination to vary the quantity of delivery from a maximum to zero and also to eiect the re.-

verse directional flow of the `fluid, and this with In the accompanying drawings, wherein like (Cl. 10a-37) reference characters designate corresponding parts throughout the several views:

Figure 1 is a horizontal cross sectional view through the-balanced variable delivery pump or blower, showing the internal mechanism, as well as a portion of the means for varying the angle at which the propeller unit may be positioned, the section being taken substantially on the line 1-1 of Figure 2; y

Figure 2 is a vertical sectional view taken ap- 65 proximately on the line 2-2 of Figure 1, looking in the direction of the arrows; and

Figure 3 is a sectional view taken at right angles to Figure 2 on the line 3-3 of Figure 1.

In the drawings, wherein for the purpose of dicated by the arrows in Figure 3, the respective openings may be utilized either as inlet or outlet openings, depending upon the direction of cw of the liquid or gas. Suitable flanges 5-are formed on the'inlet and outlet openings 4 for securing or.

attaching inlet and outlet pipes or conduits (not shown) to the respective ends of the casing for conveying theV liquid or gas.

Upon referring to Figures 2 and 3 of the drawings, it will be observed that the top of the casing l is formed with an `enlarged opening to permit access to the interior of the casing during construction and assembly as well as after installation of the parts in the'casing for inspection, cleaning and repairs. A removable closure 6 is provided for the opening in the top ofthe casing and a flanged neck extends upwardly from the 1 top of the casing around the opening to receive the closure 6. The top of the closure is formed with a ange complementary with the ange on the neck and suitable bolts 8 extend through reg- 100 istering openings formed in theanges'7 for .removably securing thecover in position on the The pumping or blower unit that'is arranged with the centra-l portion of the casing 1 includes 105 two oppositely pitched or curved propellers or impellers 9 that are arranged to rotate in opposite directions andare further mounted for pivotal movement in the casing so as to be balanced Awithrespect to each other about a common axis in a manner to be presently described. The hubs 10 of the propellers are mounted on and keyed to the outer ends of the propeller shaft 11 that are journalled for rotation through the opposed sides of thev housing 19.

Suitable combined radial and thrust ball or roller bearings 12 are associated with the respective ends of the frame-like housing 19 for cooperation with the propeller shafts 11.

Keyed on the inner opposed ends of these propeller shafts 11 are the bevel gears 13 that mesh with the bevel gear 14 that is keyed on the intermediate portion'of the sectional power shaft 15`. As clearly illustrated in Figures 1 and 2 of the drawings, the sections of the power shaft 15 are securedtogether within the central portion of the frame-like housing 19 through the medium of the coupling 16. Suitable combined radial and thrust ball or roller bearings 17 are arranged in the respective ends of the tubular members 20 which 'members constitute housings for the sections of the power shaft 15. rEhe inner ends of the tubular members 20 are secured in the respective sides of the housing 19 w 'e' the outer ends of the tubular -members' 20 extend through suitable openings provided in the front and rear sides of the `casing 1. .One tubular member 20 is of greater length than the other as suggested more clearly in Figures l and 2.

Removable cover plates 21 are provided for the frame-like housing 19 to permit access to' the interior of the housing and furthermore,

ing 19 and also serve to prevent the admission of foreign matter to the bearings. Combined radial and thrust ballor roller bearings 24 are arranged within the neck portions extending outwardly from the openings in the opposite sides of. the

casing for cooperation with the respective tubular members 20. A removable bearing plate orl cover 26 isprovided for one of the extended bearing portions 25, while a stuffing box and gland2'7 is provided for the other part of the extended bearing portion.

vThe outer end of the longer section of the power shaft 15 is connected toand driven by a suitable motor, engine orother prime mover (not shown) through a coupling, one half of which is vthe tubular members 20 isa worm-wheel 28 and4 this worm-wheel `has meshing engagementl with the worm 29' that is supported in suitable bearings upon the bracket '34 that extend'sr laterally from the casing 1. Both the worm-wheel and the lworm arm are encased within the vhousing' 30.

The Worm 29 is vmounted on the shaft 31 and the bearings for this shaft are shown at 32. A

hand-wheel 33 -is arranged on the outer end of may be briefly stated as follows. When the parts posite direction. This is accomplished through sition. By further rotating the propellers9, the

. tensity of the horizontal component of this thrust,

jscription, that I .have provided a balanced vathe shaft 31 for actuating the worm and-the worm-wheel. A stuffing box and gland structure denoted generally by the numeral 35 is pro vided for the outer end of the longer section of the tubular member 20 thus affording a better 80 yjoint between the power sha'ft 15 and the outer are arranged as shown by the full lines in Figure 3A the two propellers or impellers 9 will be disposed vertically for affording a maximum delivery and the flow of the fluid will be in the direction from left to right. In this lposition, the motor, engine or prime mover that operates the power shaft will, through the medium of the intermeshing bevel gears, impart rotary movement to the respective propellers to cause the same to operate in opposite directions. Maximum delivery is produced because the maximum thrust is generated in the direction of ow and the axes of the propellers 9 coincide with the axes of the inlet and outlet openings 4.

By actuating the hand wheel33, the direction of thrust of the two propellers can be varied from its normal vertical position to any angular position, that is, the thrust may be made to act in an inclined direction, up-or down, or in the op'- the rotation of the worm 29 and the coasting worm-.wheel 28 which rotates the tubular members 20 and the housing 19 by which said mem# bers 20 are carried and as the propellers are carried by the housing, they will obviously be caused to assume an angular position as indicated by the dotted lines in Figure 3.

With the motor, engine or other prime mover A rotating at a constant speed in one direction, a maximum thrust is produced by the propellers 9 when the propellers are in their normal position. However, by inclining the direction of thrust, the horizontal component of the thrust, producing the ow, may be varied from a maximum to zero with the axes of the propellers 9 in-al vertical pothrust may be made to act in the opposite direction of the normalflow and thus produce a reverse maximum flow. j

Since the quantity of ow dependson the inand'the direction of flow depends on the direction of the horizontal component of lthis thrust, it is possible by rotating the hand wheel 33 to vary ythe .quantity of delivery from a maximum to zero and to also reverse the direction of iiow, if desired,

Awith the motor, engine or other .prime mover operating at a constant speed or at any other speed that operating conditions may demand. 'It' will' thus be seen from the foregoing desamestructure is also capable of being used as a blower or compressor for'handling gases.

While I have shown the preferred embodiment of the invention, it is to be understood that minor changes in the size, shape and arrangement of parts rnay be resorted to without departing from iwf the spirit of the invention and the scope of the appended claims. Having thus described the invention, what I xclaim is:

1. In a pump or blower structure of the class described, a. casing provided with alined uid inlet and outlet openings, a pumping or blower unit arranged centrally within the casing and including a housing mounted for swingable movement about .a horizontal axis, a pair of oppositely pitched propellers mounted lon'the housing and facing the respective openings in the casing, a drive shaft extending through one side of the casing and into said housing, propeller shafts mounted on the housingl for supporting the respective propellers, coacting means between the drive shaft and the propeller shafts for causing the rotation ofthe propeller shafts in opposite directions, and means for moving the unit about its horizontal axis to position the propeller at any predetermined angle of inclination to vary the discharge of the fluid.

2. In a pump or blower structure of the class described, a casing provided with alined fluid inlet and outlet openings, a pumping or blower unit arranged centrally within the casing and including a housing mounted for swingable movement about a horizontal axis, a pair of oppositely pitched propellers mounted on the housing and facing the respective openings in the casing, a drive shaft extending through one side of the casing and into said housing, propeller shafts mounted on the housing for supporting the respective propellers, coacting means Abetween the drive shaft andthe propeller shafts for causing the rotation of the vpropeller shafts in opposite directions, and means for moving the unit about its horizontal axis to position the propeller at any predetermined angle of inclination to vary the discharge of the fluid, said last mentioned means being arranged exteriorly of the casing and being manually controlled.

3. In a pump or blower structure, a casing pro- 'vided with` alineduid inletand outlet openings, a propeller carrying unit arranged centrally within the casing and including a housing, rotatable tubular supporting means for the housing extending through the casing at an angle with respect to the inlet and outlet openings, propeller shafts journalled for rotation in-. the housing and arranged in alinement with said openings. oppositely pitched propellers carried. by the outer ends of said propeller shafts, 'a rotatable power shaft extending through the tubular Fsupporting means for the housing and into the housing, in-

the power shaft for effecting the rotation of the housing extending through the casing at an anpropellers in the reverse direction, and meansfor adjusting the housing to position the propellers at any predetermined angle of inclination within the casing to vary the quantity of delivery of the uid. s

4. In a pump or blower structure, a. casing provided with alined fluid inlet and` outlet openings, a propeller carrying unit arranged centrally within the casing and including a housing, rotatable tubular supporting means for the housing extending through the casing at an angle with respect to the inlet and outlet openings, propeller shafts joumaled for rotation in thehous-y ing ,and arranged in alinement with said openings, oppositely pitched propellers carried by the outer ends of said propeller-shafts, a rotatable power shaft extending through the tubular-supporting means for the housing and into the housf ing,.intermeshing gears arranged on-the inner ends of the propeller shafts and the adjacent portion of the power shaft for effecting the rotation of the propellers in the reverse direction, and manually operable means for association with the outer end` of the tubular supporting member to rotate the same andthe housing whereby the propellers may be positioned at any predetermined angle of inclination to vary the discharge of the fluid.

5. In a'pump or blower structure, a casing provided withalined fluid inlet land outlet openings, a propeller carrying unit arranged centrally within the casing and 1,including a hous.- ing, rotatable tubular supporting means for the gle with respect to the inlet and outlet open- ;ings, propeller shafts joumaled for rotation in the housing and arranged in alinement with said' openings, oppositely pitched propellers carried by the outer ends of said propeller shafts, a rotatable power shaft extending thr ugh the tubular supporting means for the hous g and into the housing, intermeshing gears arranged on the inner ends of the propeller shafts and thev adjacent portion of the power shaft for effecting` the rotation of-the propellers in' the reverse direction, and manually operable means for association with the outer end of thel tubular supporting member to rotate the same and the housing wherebylt'he propellers maybe posiv tioned at any predetermined 'angle of inclination to vary the discharge of the fluid, said last mentioned means including a worm-wheel carried by the tubular supporting member, a worm engaging the worm-wheel, a shaft carrying said worm, Supporting means for the shaft, and a 1'3;

vhand-wheel on one end of the worm-shaft. f

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