US3143079A

US3143079A - Reversible discharge flow and variable displacement pump

Info

Publication number: US3143079A
Application number: US129697A
Authority: US
Inventors: James F Carner
Original assignee: Individual
Current assignee: Individual
Priority date: 1961-08-07
Filing date: 1961-08-07
Publication date: 1964-08-04
Anticipated expiration: 1981-08-04

Description

Ag. 4, 1964 J. F. CARNER L 3,143,079

l REVERSIBLE DISCHARGE FLOW AND VARIABLE DISPLACEMENT PUMP Filed Aug. 7, 1961 2 Sheets-Sheet 1 E 4 1964. '.1.1|=. :ARNE1'R' 3,143,079

REVERSIBLE DISCHARGE -FLOWAND VARIABLE DISPLACEMENT PUMP Filed Aug. '7, 1961 l v `2 Sheets-Sheet 2 United States Patent() 3,143,079 REVERSIBLE DISCHARGE FLW AND VARABLE DISPLACEMENT P James F. Carrier, 17370 Grand Ave., Eisinore, Calif. Fiied Aug. 7, 1961, Ser. No. 129,697 Claims. (Cl. 103-120) This invention relates to a reversible discharge ow and variable displacement pump and comprises an improvement on my previous Patent No. 2,685,255, dated August 3, 1954.

An object of my invention is to provide a pump of the character stated which is capable of supplying fluid at any desired rate of ow within the ring of the pump by means of a single adjustment which may be made to the pump while it is operating. The pump also permits reversal of the direction of How from the pump during operation thereof by the same means which is employed in controlling the rate of uid discharge from the pump. By this means I eliminate various intricate pipes and valves which were heretofore required for this purpose.

Another object of my invention is to provide a novel pump of the character stated which is so constructed that the cylinders for the adjusting yoke are so mounted on the body of the pump that possible leakage between the cylinders and the body is eliminated.

Another object of my invention is to provide a novel pump of the character stated in which the adjusting yoke is formed with integral pistons on both sides thereof. By this means the adjusting yoke is moved within the pump as required.

Still another object is to construct the main case in two complementary halves, which simplies the construction of the case and permits machining of the inner surfaces thereof.

Other objects, advantages and features of invention may appear from the accompanying drawings, the subjoined detailed description and the appended claims.

In the drawings:

FIGURE l is a vertical sectional view of my reversible discharge flow and variable displacement pump.

FIGURE 2 is a fragmentary sectional view taken on line 2 2 of FIGURE 1.

FIGURE 3 is a fragmentary sectional view taken on line 3 3 of FIGURE l.

FIGURE 4 is a side view of one of the complementary housing halves of the pump.

FIGURE 5 is a side view of one of the vanes.

Referring more particularly to the drawing, the numeral 1 indicates the outer housing of the pump which is formed in two complementary halves 2 and 3. The housing halves are both planed off to form a flat surface, as shown at 4 and 5, and these surfaces are diametrically opposed. The purpose of the flat surfaces 4 and S is to accommodate cylinders 6 and 7 respectively, which are bolted to the housing and which serve as a means to move or adjust the adjusting yoke, as will be subsequently described. The housing sections 2 and 3 are bolted together in the usual machinery practice, as are also the cylinders 6 and 7. Suitable O-rings or

packings

8 and 9 seal off between the housing and the cylinders 6 and 7 respectively, thus preventing leakage between the housing and the cylinders. A sleeve 10 is bolted to the outer face of the housing part 2 and this sleeve carries suitable bearings of the drive shaft 11 which extends into the case for the purpose of driving the pump, as will be subsequently described. The shaft 11 has a rotor 12, either integral with the inner end of the shaft or suitably iixedly attached thereto, and a bearing 13 supports the rotor and the inner end of the shaft 11. The rotor 12 is positioned within the pumping chamber 14 of the housing 1, and this pumping chamber entirely surrounds the rotor,

lCC y as shown in FGURE l. A pair of ports 15 and 16 extend through the housing section 3 and thence into the pumping chamber 14. The ports 15 and 16 may be either intake or outlet ports, depending on the direction of rotation of the rotor 12 of the pump. The ports 15 and 16 extend into the side of the pump chamber 14, substantially as shown in FIGURE 2.

An adjusting yoke 17 is circular in shape and is positioned within the pumping chamber 14. The yoke 17 is formed with two integral pistons 1S and 19 which are oppositely positioned on the yoke and which pistons tit into the cylinders 6 and 7 respectively. The pistons 1S and 19 enable the yoke 17 to be adjusted to various eccentric positions Within the chamber 14 by either exerting hydraulic or pneumatic pressure on the pistons 18-19 as, for example, through the port 20, or an adjusting rod 21 may be attached to one or both of the pistons. The adjusting yoke 17 can thus be moved to vary the displacement of the pump, and also to elect reversal of the discharge if desired.

The yoke 17 is formed as a recessed annular structure which has a peripheral wall 22 and one side wall 23. The other side of the yoke is open to permit the rotor 12 to enter. At the top and the bottom of the yoke 17 1 provide

arcuate ports

24 and 25, which ports extend through the wall 23. The

ports

24 and 25 permit uid to move into and out of the adjusting yoke 17 through the ports 1S and 16, that is, depending upon whether the port 15 is an intake port, then iiuid will enter the yoke 17 through the arcuate opening 24 and will leave or discharge through the opening 25 and the port 16. To support the yoke 17 on one side and to prevent tilting of the yoke, I provide two

short blocks

26 and 27, which project from the housing half 2 and will bear against one verticalface of the yoke 17.

Within the rotor 12 I provide a plurality of radially extending vanes 28, the outer ends of which bear against a ring 29 which is freely rotatable within the yoke 17 and rotates with the vanes. The inner ends of the vanes engage the periphery of a bearing 30, the bearing being fixedly attached to the rear Wall 23 of the yoke 17, that is, the bearing may be bolted to this wall. To prevent pressure accumulation at the inner ends of the vanes 28, and within the space surrounding the bearing 30, the sides of the vanes may be planed off, as shown at 31, so that the fluid can by-pass these vanes Without a retarding action on the rotor and without any pumping action at this point. The pumping action will be around the outer periphery of the rotor 12 and on the inside of the ring 29. The fluid will enter and leave the spaces between the various vanes in an axial direction, and will both enter and leave the pump axially through the ports 15-16, as previously described.

In Operation The rotor 12 is continuously rotated through the shaft 11, thus moving the vanes 28 within the shift yoke 17. The rotor 12 moves eccentrically within the shift yoke 17, thus creating a pumping action within the shift yoke as the vanes 28 rotate. The bearing 30 engaging the inner ends of the vanes 28 will move these vanes radially through the rotor 12, as the shift yoke 17 is moved from side to side within the housing 1. The shift yoke 17 is moved through the medium of the

pistons

18 and 19, either manually or by hydraulic or pneumatic pressure. The pumping duid moves into the spaces between the vanes 28 through the port 15, for example, thence through the arcuate opening 24, and finally out through the outlet opening 25 and the outlet port 16; the movement of the fluid being thus axial with relation to the drive shaft 11.

The cylinders 6 and 7 are mounted on the flat finished surfaces 4 5 respectively, and are sealed off by the

packis ing

8 and 9 respectively. Thus the cylinders can be properly aligned with the shift yoke 17, and also these cylinders can be easily removed and replaced when Worn.

Having described my invention, I claim:

1. In a reversible discharge ilow and variable displacement pump comprising a housing, said housing having a chamber therein, a rotor concentrically journaled in said chamber, a shaft attached to said rotor to drive the same, a plurality of radially extending vanes slidably mounted in said rotor for radial movement, a shift yoke slidably mounted in said housing for movement relative to the rotor, means on the yoke engaging the inner radial ends of the vanes, oppositely positioned and radially extending pistons on said yoke, cylinders detachably mounted on the housing, said pistons extending into the cylinders, said housing including a flat sealing surface thereon to receive the cylinders, said shift yoke having a recess formed therein to receive said vanes, said recess being larger in diameter than the rotor to provide pumping chambers between the rotor and the peripheral surface of the recess, said housing having a uid inlet and a fluid outlet therein, both extending axially, a vertical wall on one side of said shift yoke, said wall having a pair of arcuate openings therethrough, said arcuate openings communieating with the pumping chambers in all positions of the parts whereby the pumping chambers are successively opened to the inlet port and the outlet port, and a ring rotatably mounted on the inner circular face of said shift yoke, the outer ends of the vanes sealingly engaging said ring.

2. In a reversible discharge flow and variable displacement pump comprising a housing, said housing having a chamber therein, a rotor concentrically journaled in said chamber, a shaft attached to said rotor to drive the same, a plurality of radially extending vanes slidably mounted in said rotor for radial movement, a shift yoke slidably mounted in said housing for movement relative to the rotor, means on the yoke engaging the inner radial ends of the vanes, oppositely positioned and radially extending pistons on said yoke, cylinders detachably mounted on the housing, said pistons extending into the cylinders, said housing including a at sealing surface thereon to receive the cylinders, said shift yoke having a recess formed therein to receive said vanes, said recess being larger in diameter than the rotor to provide pumping chambers between the rotor and the peripheral surface of the recess, said housing having a fluid inlet and a iluid outlet therein, both extending axially, a vertical Wall on one side of said shift yoke, said wall having a pair of arcuate openings therethrough, said arcuate openings communicating with the pumping chambers in all positions of the parts whereby the pumping chambers are successively opened to the-inlet port and the outlet port, and bearing blocks projecting from said housing and bearing against one vertical face of the shift yoke to support said shift yoke.

3. In a reversible discharge flow and variable displacement pump comprising a housing, said housing having a chamber therein, a rotor concentrically journaled in said chamber, a shaft attached to said rotor to drive the same, a plurality of radially extending vanes slidably mounted in said rotor for radial movement, a shift yoke slidably mounted in said housing for movement relative to the rotor, means on the yoke engaging the inner radial ends of the vanes, oppositely positioned and radially extending pistons on said yoke, cylinders detachably mounted on the housing, said pistons extending into the cylinders, said housing including a flat sealing surface thereon to receive the cylinders, said shift yoke having a recess formed therein to receive said vanes, said recess being larger in diameter than the rotor to provide pumping chambers between the rotor and the peripheral surface of the recess, said housing having a i'luid inlet and a fluid outlet therein,

both extending axially, a vertical wall on one side of said shift yoke, said wall having a pair of arcuate openings therethrough, said arcuate openings communicating with the pumping chambers in all positions of the parts whereby the pumping chambers are successively opened to the inlet port and the outlet port, and bearing blocks projecting from said housing and bearing against one vertical face of the shift yoke to support said shift yoke, and a ring rotatably mounted on the inner circular face of said shift yoke, the outer ends of the vanes sealingly engaging said ring.

4. In a reversible discharge flow and variable displacement pump comprising a housing, said housing having a chamber therein, a rotor concentrically journaled in said chamber, a shaft attached to said rotor to drive the same, a plurality of radially extending vanes slidably mounted in said rotor for radial movement, a shift yoke slidably mounted in said housing for movement relative to the rotor, means on the yoke engaging the inner radial ends of the vanes, oppositely positioned and radially extending pistons on said yoke, cylinders detachably mounted on the housing, said pistons extending into the cylinders, said housing including a flat sealing surface thereon to receive the cylinders, said shift yoke having a recess formed therein to receive said vanes, said recess being larger in diameter than the rotor to provide pumping chambers between the rotor and the peripheral surface of the recess, said housing having a iluid inlet and a fluid outlet therein, both extending axially, a vertical wall on one side of said shift yoke, said Wall having a pair of arcuate openings therethrough, said arcuate openings communicating with the pumping chambers in all positions of the parts whereby the pumping chambers are successively opened to the inlet port and the outlet port, a bearing mounted in said vertical Wall, the inner radial ends of the vanes resting on said bearing.

5. In a reversible discharge ow and variable displacement pump comprising a housing, said housing having a chamber therein, a rotor concentrically journaled in said chamber, a shaft attached to said rotor to drive the same, a plurality of radially extending varies slidably mounted in said rotor for radial movement, a shift yoke slidably mounted in said housing for movement relative to the rotor, means on the yoke engaging the inner radial ends of the vanes, oppositely positioned and radially extending pistons on said yoke, cylinders detachably mounted on the housing, said pistons extending into the cylinders, said housing including a fiat sealing surface thereon to receive the cylinders, said shift yoke having a recess formed therein to receive said vanes, said recess being larger in diameter than the rotor to provide pumping chambers between the rotor and the peripheral surface of the recess, said housing having a fluid inlet and a lluid outlet therein, both extending axially, a Vertical wall on one side of said shift yoke, said Wall having a pair of arcuate openings therethrough, said arcuate openings communicating with the pumping chambers in all positions of the parts Whereby the pumping chambers are successively opened to the inlet port and the outlet port, and a ring rotatably mounted on the inner circular face of said shift yoke, the outer ends of the varies sealingly engaging said ring, a bearing mounted in said vertical wall, the inner radial ends of the vanes resting on said bearing.

References Cited in the file of this patent UNITED STATES PATENTS 1,943,929 Rayburn Jan. 16, 1934 2,049,092 Sturm July 28, 1936 2,685,255 Carner Aug. 3, 1954 2,782,724 Humphreys Feb. 26, 1957 FOREIGN PATENTS 202,525 Australia July 13, 1956

Claims

1. IN A REVERSIBLE DISCHARGE FLOW AND VARIABLE DISPLACEMENT PUMP COMPRISING A HOUSING, SAID HOUSING HAVING A CHAMBER THEREIN, A ROTOR CONCENTRICALLY JOURNALED IN SAID CHAMBER, A SHAFT ATTACHED TO SAID ROTOR TO DRIVE THE SAME, A PLURALITY OF RADIALLY EXTENDING VANES SLIDABLY MOUNTED IN SAID ROTOR FOR RADIAL MOVEMENT, A SHIFT YOKE SLIDABLY MOUNTED IN SAID HOUSING FOR MOVEMENT RELATIVE TO THE ROTOR, MEANS ON THE YOKE ENGAGING THE INNER RADIAL ENDS OF THE VANES, OPPOSITELY POSITIONED AND RADIALLY EXTENDING PISTONS ON SAID YOKE, CYLINDERS DETACHABLY MOUNTED ON THE HOUSING, SAID PISTONS EXTENDING INTO THE CYLINDERS, SAID HOUSING INCLUDING A FLAT SEALING SURFACE THEREON TO RECEIVE THE CYLINDERS, SAID SHIFT YOKE HAVING A RECESS FORMED THEREIN TO RECEIVE SAID VANES, SAID RECESS BEING LARGER IN DIAMETER THAN THE ROTOR TO PROVIDE PUMPING CHAMBERS BETWEEN THE ROTOR AND THE PERIPHERAL SURFACE OF THE RECESS, SAID HOUSING HAVING A FLUID INLET AND A FLUID OUTLET THEREIN, BOTH EXTENDING AXIALLY, A VERTICAL WALL ON ONE SIDE OF SAID SHIFT YOKE, SAID WALL HAVING A PAIR OF ARCUATE OPENINGS THERETHROUGH, SAID ARCUATE OPENINGS COMMUNI-