USRE23015E

USRE23015E - Reversible rotary blower

Info

Publication number: USRE23015E
Authority: US
Publication date: 1948-07-06

Description

F. B. YlNGLlNG REVERSIBLE ROTARY BLOWER July 6, 1948.

3 Sheets-Sheet 1 Original Filed Sept. 19, 1941 M RN July 6, 1948. F. B. YINGLING REVERSIBLE ROTARY BLD-WER original Filed sept. 19, 1941 3 Sheets-Sheet 2 .llll ill I July 6, 1948. F. B. YINGLING REVERSIBLE ROTARY BLOWER 5 Sheets-Sheet 3 Original Filed Sept. 19, 1941 I INVENTOR. )Fifi/vx 21 Y//vGu/fs Reissued July 6, 1948 REVERSIBLE RTARY BLWER Frank B, Yinglng, Hamilton, Ohio Original .Na 2,355,494, dated August 8, 1944, Serial No. 411,560, September 19, 1941. Application for reissue 577,253

Claims.. l

My `present invention relates to an improved reversible rotary blower capable of delivering a desired volume of fluid pressure when rotating in either forward or vreverse direction, and control means are provided Vfor changing the entry direction to, through, and out of vthe blower casing, in accord with changes in the rotational movement of the blower. While my improved blower is adapted Ifor impelling various vfluid currents,v it is particularly designed lfor impelling air, preferably at comparatively low pressure for scavenging use with internal combustion engines of the Diesel type. When such engines are adapted for ship propulsion the blower' of my invention is especially applicable for combination with the engine, and the reversible blower is controlled by the reversing devices of the engine.

In carrying out my invention I have provided a compactly arranged 4blower that occupies comparatively small space, which is fashioned of a minimum number of parts .to facilitate manufactuil'e, installation, and operation of the apparatus, and which, because of its simplicity in construction, is easily operated when necessary, and durable.

The invention consists in certain lnovel c9111.- binations and arrangements in the blower -including an .exterior housing and interior impeller casing, with a single valve at each side of the casing to control an intake port and an outlet port, .and means for changing the positions oi the valves to vary the entry and delivery 1direction ci vair currents through .the casing.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my positive displacement blower, which is installed for use with. a Diesel engine of the marine type.

Figure l is an end view of the engine showing the blower mounted thereon, and the control mechanism for the engine and the valve mechanism of the blower.

Figure 2 is a side elevation of the blower` showing also in side elevation a portion o f the end o f the engine on which the blower is mounted.

Figure 3 Ais a vertical sectional view as at line 3 3 of Figure 1.

`Figure 4 is a vertical sectional View transversely ofthe engine as at line 4,-4 of Figure 2.

Figure 5 is a horizontal sectional View as at line 5-5 of Figure 4.

Figure 6 is a sectional View showing the body of Ithe -blower, but with the interengaging impellers in section and 'rotating in direction opposite to that of Figure 4, the twovalves in posi- February 10, 1945 Serial No.

tions opposite to the valves in Fig-ure 4, and the air currents entering, passing through, and being delivered from the casing in ldirection opposite to that of Figure 4. v

Figure 'l is a vertical sectional view showing especially the details of the two impellers and their .driving sears or onions.

In .order that utility of the .blower may readily be appreciated, I have indicated -in Figures i and 2 a portion of the engine as E, with its Ina/in shaft or crankshaft S `from which the blower is operated, and in Figure 2 is seen a portion of the ail' duct D that ,supplies low pressure :air currents.

to .the cylinders of ythe engine for scavenging purposes, as well as air yfor combustion in the fuel mixture,

The nevers-ibis positive displacement b lwei' is shown as located or mounted .on the end of the engine and extending transversely thereof, with the shafts of ,the rotary interengaging impellers and the hinges orfpivots of the two control valves l parallel with the main shaft S of the engine.

The compactly arranged `apparatus includes an exterior housing .I having .openings in its opposite side walls, and these side openings are closed by exterior bearing plates 2 and k3 which .also

form frame portions `that are bolted to the op? posits sides of the housing.

Within the housing and between :these side plates is provided 4an interior impeller casing that includes two transversely extending, upperand lower, spaced concaves 4 and v,5, here shown* as approximately semifcircular in cross-section and in which the two interengaging impellers .or rotors G 7and l revolve in well vknown manner to create `the air currents.

These firnpellers `or rotors are synchronized to rotate in yopposite directions so that their wings will sweep :the lair thrmtg-h the respective `oonca-ves croate the desired air blast vwhich passes through the interior casing, and one wing of one impeller .cooperates with the .pivotal Aportion .of the other -i-mpejller to create a central `airseal between `the two spaced :wall openings of lthe casing.

In "Fig, .4 the rotor ii is rotating `counter-clockwise and the rotor l is turning clockwise for creating the `passage of a current of air lfrom :the

right end opening through the interior casing to the A'left end thereof as indicated by arrows. It will be understood that when the engine is reversed the blower also is reversed, and the rotors of the impeller in Fig. 6 rotate las indicated 'by the arrows, i. e. rotor turns clockwise and rotor l 4turns counter-clockwise Ato create the air eu-rf rent from the left end of the casing, therethrough, and out at the right end of the casing. The two rotors of the impeller, which are shown as having hollow wings, are mounted on their respective shafts 8 and 9 and these shafts at their ends project through the sides of the casing, and also through bearing bosses Ill of the side plate 2 and bearing bosses' II of the side plate 3. These bosses are located on the outer sides of the side plates, and the ends of the shafts are journaled in the bosses and provided with usual fastening means as nuts as indicated.

The interengaging rotors of the impeller are synchronized for operation with theengine shaft S, and power is transmitted from the mainshaft to the blower apparatus through an intermediate train of gears and pinions indicated as I2, I3, I4, I and I6, the large gear I2 being mounted on the engine shaft S, and the last small gears or pinicns I5 and I6 being mounted on the ends of the blower shafts as best seen in Figures 3' and 7.

Thefopposite sides of the interior casing including the ends of the concaves 4 and 5 are `closed by the

plates

2 and 2a and 3 and 3a,

and the removal of these plates, of course, permits ready access to the interior of the casing for servicing the rotors of the impeller and other parts of the blower.

vAs best seen in Figures 4 and 6 the several parallel edges of the spaced semi-circular or semi-cylindrical concaves 4 and 5 may be fashioned with out-turned lips or flanges that provide seats I1 along one edge of each of the four ports I8, I9, 20, and 2| that are angularly disposed in pairs between the concaves, and the ports extend from one open side of the impeller casing to the opposite open side.

Each port I8 and I9 at opposite ends of the impeller casing merges with an adjoining wallopening in the casing, and these ports are a1- ternately used as air intake ports opening into the interior of the casing. Each port 2'0, 2|, at opposite ends of the impeller casing also merges with an adjoining wall-opening in the casing, and these ports 20, 2fI, which are disposed angularly of ports I8 and I9, are alternately used as outlet ports for air currents from the interior I of the impeller casing.

In Figure 4 the lower right hand intake port I9 is shown as open, and the upfper left hand outletv or delivery port '2| is open, wlrile the lower cf'l; hand intake port I8 is closed by a pivoted or hinged flap valve 22, and the upper, right hand outlet or delivery port 20 is closed by an op'positely arranged pivoted or hinge valve 23. Thus it will be apparent that one valve closes an intake port while the other valve closes an outlet port at the opposite sides of the irnpeller, leaving an intake port open at one side of the impeller and an outlet or delivery port open at the opposite side of the mpeller. These valves are connected so that they move simultaneously to chan-ge the flow of air currents through the blower casing when the rotary movements of the rotors are reversed in accord with the reversal of movement ofthe engine shaft S.

In Figure 4 the valves are arranged so that the air current is passing through the casing from right to left, while in Fig. 6 the positions of the valves have been changed and the air current is passing through the impeller casing from left to right.

AAs indicated in the drawings the adjoining ports at each sidel ofthe impeller are arranged 4 at approximately S10-degree angles, and each valve is movable through an arc of approximately ninety-degrees to open one valve por-t and close the angularly adjoining lport, thereby providing a compactly arranged valve mechanism for directly controlling the movement of air currents to, through, and out of the impeller casing. The valves are each provided with a hinge pin or journal pin as 24 and 25 respectively, which pins pass through the openings at the sides of the impeller casing, and as seen in Figures 1, 2, and 5 the ends of the pins are journaled in bear- 'ing bosses as 26 mounted upon the exterior sides of the iplates 2 an-d 3 of the housing.

These hinge pins of the valves are connected with each other at the front of the blower by means of lever arms 21 and 28 and the connect- Ning link 29 and .the arms and pins with their valves are movedy simultaneously by a pull or push on a short operating link 30 that is pivoted to the lower free end of a lever arm 3l mounted on the valve pin 25 at the rear of the blower.

As best seen in Figures 4 and 6 the two intake ports I8 and Il!! open outwardly to a constant intake chamber 32, and the outlet or delivery ports 2li and 2l open outwardly from the interior of the impeller casing to an outlet chamber or constant delivery chamber 33 for air under pressure. These respective chambers are sh-own in Figure 6 as inclosed within the exterior housing and formed -between the outer walls of the housing and the concaves of the interior impeller casing, which concaves are surrounded by the respective chambers. The intake ports I8 and i9 afford direct communication between the constant intake chamber andthe interior of the impeller casing, and the outlet ports '20 and 2| afford direct communication between the interior of the impeller casing and the outlet or constant delivery chamber, and the valves 22 and 213 have direct control of these ports to change the direction of flow of air currents. livery chamber or pressure chamber 33 delivers air under pressure to the interior passage of an angular connection 34 that unites the blower with the air duct D of the engine, and the' intake chamber 32 receives air through the pas-v sage in the feed nozzle 35 and pipe 36.

It will be apparent that the air currents at all` times move in the same direction through the passage of the connection 34 toward the air duct D of the engine, but the entry-direction of air to the impeller casing may be changed from one side of the impellers to the opposite side thereof thereby reversing the flow of air currents through the casing and changing the outlet or delivery direction of air currents from one side to `the other side of the imp-allers.

These changes in the directional flow of air currents through the interior of the impeller casing may be under manual control, but when theblower apparatus is combined withthe engine as illustrated the control of the valves is` co-ordinat-ed with the engine control so that the valves are reversed from the engine control sta-- 1 and 2 by a conventionalized hand lever 31 and;

The dethe connecting link 38, and suitable linkage is provided to the link 30 (heretofore mentioned) as indicated at 39, 40, 'and 4|, for simultaneously changing the position of the two valves.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a reversible rotary blower, the combination with an exterior housing and a spaced in terior casing forming a constant intake chamber and a constant delivery chamber, said casing comprising two spaced hemispherical concaves having each an intake port and an outlet port at each side ol the blower, said ports being located between the interior of the casing and said chambers, and a pair o1" reversible rotary .interengaging impellers within the casing and operating means therefor, of a valve at one side of the casing controlling an intake port and an outlet port, another valve at the other side of the casing controlling an outlet port and an intake port, and means for reversing the positions of said valves to reverse the passage of air currents through the casing.

2. In a reversible rotary blower including an impeller casing, the combination of interengaging rotary impel'lers mounted in the casing, and reversible means for driving .the impellers, said casing having a pair of controlled and opposed intake port-s and another pair of controlled and opposed outlet ports, and means co-acting with opposed wall-openings in the casing and operative to alternately open and close the .ports in the respective pairs of ports to reverse the entry and delivery directions of air currents through the casing.

3. In a reversible rotary blower, the combination with an exterior housing having spaced constant intake and delivery chambers, of a casing located between said chambers, said casing having a pair of opposed and controlled intake ports adapted to be alternately -opened and closed and a pair of opposed and controlled outlet ports adapted to be alternately opened and closed, rotary interengaging liinpellers mounted in the casing between pairs of ports, reversible means i'or driving the impellers, and two spaced movable devices coacting with openings in opposite endwalls of the casing operable to open and close the respective pairs of intake and outlet ports with relation to the respective intake and delivery chambers.

4. In a reversible rotary blower, the combination with an exterior housing having spaced constant intake and delivery chambers, of a casing located between said chambers, said casing having a pair of opposed and controlled intake ports adapted to be alternately opened and lclosed and a pair of opposed and controlled outlet ports adapted to be alternately opened and closed, rotary interengag-ing impellers mounted in the casing between pairs of ports, reversible means for driving the impellers, two spaced movable devices `co-acting with openings in opposite endwalls lof the casing operable to open and close the respective jpairs of intake and outlet ports with relation to the intake and delivery chambers, reversing means to control the driving means, and operative connections between said reversing means and said movable devices, whereby the entry and delivery directions of air currents are reversed through the casing.

5. In a reversible blower, the combination of an exterior housing and interior casing form-ing separate intake and delivery chambers within the housing, interengaging rotary impellers mounted in lthe casing Iand operating means therefor, said casing having wall-openings at op'- posite sides of the impellers communicating with one or another of the chambers, a pair of opposed ap valves pivotally mounted between said chambers at opposite sides of the impellers with their free edges oo-acting alternately with spaced edges of the wall openings, means for reversing the rotation of the impellers and cooperating means for reversing the positions of the valves.

FRANK B. YINGLING.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date '713,443 Jewell Nov. 11, 1902 1,904,056 Kjaer Apr. 18, 1933 2,037,407 Taylor Apr. 14, 1936 FOREIGN PATENTS Number Country Date 265,511 Great Britain 1927 340,777 Great Britain 1931 550,082` Great Britain 1942 706,058 France 1931