Non-Reciprocating Hydraulic Piston Pump

Abstract

It is a positive displacement, non-pulsating hydraulic pump with a double action piston that is non-reciprocating and generates fixed volume with high pressure. The piston moves in one direction through the inside of a toroid chamber in which two movable walls isolate the loading and unloading cavities. When a movable wall opens to give way to the piston the other movable wall splits two cavities within this chamber. When hydraulic pressure is supplied it works as a hydraulic motor, which allows the use of high efficiency and performance of the piston in the production of electric energy. It also substantially reduces size and considerably simplifies the mounting of the piston's operating mechanism. All of this improves performance of the hydrostatic transmission.

Claims

1- Non-reciprocating hydraulic piston pump, characterized by: a piston that is attached to the outer rim a wheel. This piston is driven by the wheel's rotation with a constant direction within a toroidal chamber. Inside this chamber, two movable walls slide in to insulate the loading and unloading cavities and slide out to make way for the piston. On or near the forward facing side (head) of the piston, we find the port of entry, while the discharge port is on the opposite side.

2- Movable walls system for the non-reciprocating operation of the piston, characterized by: Movable walls which move entering and leaving a cavity prepared for its displacement in the casing of a toroidal chamber. Each wall moves inside this toroidal chamber to insulate cavities for loading and unloading of a piston. The walls are removed from the toroidal chamber to make way for the piston moving through this camera. These movable walls are moved by mechanism synchronized with the movement of the piston.

3- An evacuation conduit for the displacement of the movable walls characterized by: conduit that communicates the cavity of displacement of the movable wall, according to claim 2, with the piston chamber. Through this conduit, the liquid is evacuated when the movable walls move in or out of their displacement cavity.

4- The non-reciprocating hydraulic piston pump's wheel. Characterized by: a wheel having a piston fixed on a surface location of its outer rim. In the rim and near the piston, or on the piston, has a hole or opening which provides access from this side of the rim toward a side of the wheel. On the other side of the piston, in the rim and close to the piston, or on the piston, has another hole or opening that gives access from this side of the rim to the other side of the wheel.

5- Toroidal chamber with movable walls for the piston stroke. Characterized by: toroidal chamber formed between: the surface of the rim of wheel, according to claim 4, and the inner wall of a casing, where the piston moves driven by the wheel. Movable walls, according to claim 2, insulate two cavities in this chamber.

6- Non-reciprocating piston of double effect. Characterized by: A double-acting piston that moves in one direction, in a toroidal chamber according to claim 5. The piston head creates constant expulsion or discharge because it constantly reduces a cavity in this camera. The rear of the piston causes constant load or suction because it constantly increases a cavity in this camera.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG. (1). Shows the front view askew of the pump, without cap, to see parts of the internal mechanism.

[0033] FIG. (2-A). Cut side of the pump for interior view: movable wall, rods, cam, wheel, casing, cap, shaft.

[0034] FIG. (2-B). Front view of the mechanism that moves the movable walls: cams, rods and movable walls.

[0035] FIG. (2-C). Shows the view lopsided the cam and movable walls.

[0036] FIG. (3-A). Front view of the cap of the pump, cam, the rods and cap of the rods.

[0037] FIG. (3-B). Side cut view of the cap of the pump, cam, the rods and cap of the rods.

[0038] FIGS. (4-A), (4-B), (4-C) and (4-D). Views of the functioning of movable walls at different times of the rotation of the piston.

[0039] FIG. (5). Ensemble of the pump. All pump parts separated in order to be assembled.

DRAWINGS REFERENCE NUMERALS

[0040]

TABLE-US-00001  1- casing.  2- movable wall.  3- piston.  4- inlet  5- outlet.  6- cam.  7- rod.  8- displacement cavity.  9- port of entry (suction). 10- port of unload (discharge). 11- hole for rod. 12- wheel. 13- holes for screws. 14- shaft. 15- pump cap. 16- cap of the rod. 17- access for rod. 18- evacuation conduit. 19- axle hole 20- Inner wall. 21- bottom of the casing. 22- rod inlet seal.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] A preferred embodiment of the closure of the present invention is illustrated in FIG. (1) and FIG. (2).

[0042] FIG. (1) shows the front-askew view of the pump, without the cap, to see the internal mechanism.

[0043] The piston (3) is fixed to the wheel rim (12). On the wheel rim (12), and near one side of the piston (3), is the suction port (9), which has access to the lateral face of the wheel (12).

[0044] On the wheel rim (12) and near the other side of the piston (3), is the discharge port (10) which has access to the other side face of the wheel (12).

[0045] The wheel has an axle (14) which rotates within the axle hole (19) which allows the wheel to slide to the piston by the internal walls of the housing.

[0046] The two movable walls (2) are in its cavities for displacement (8), each located on both sides of the casing (1).

[0047] The screw holes (13), are for attaching the pump cap to the casing. Pump cap (15) in the FIGS. (2-A, 3-A, 3-B and 5).

[0048] FIG. 2-A shows a side cross section of the pump to see inside. The pump cap (15) is attached to the housing (1), wherein the wheel (12) can rotate with its shaft (14). The edges of the wheel rim, makes sealed contact with the bottom of the housing and the pump cap.

[0049] FIG. 2-A. Between one of the sides of the wheel and the inside bottom of the casing, there is a cavity that has access to the inlet (4) of the pump, in the casing (1). And between the other side of the wheel and pump cap, there is a cavity that has access to the outlet (5) of the pump.

[0050] When rotating, the cam (6) drives the rods (7). These through the access for rod (17), in the pump cap, are inserted into the hole for rod (11) to displace the movable walls (2) within the displacement cavity (8) in the casing. We can see how the rods (7), by means of an deflection, are connected to the two levels of cam (6).

[0051] FIG. (2-B) shows the front view of the cam (6) and rods (7), inserted in holes for rod (11) in movable walls.

[0052] FIG. (2-C) shows the side-tilted view of cam (6). In this view it can be seen that the cam has two levels, each of which is responsible for half of the movement of the rods.

[0053] FIGS. (2-A), (2-B) and (2-C) show movable walls (2), hole for the rod (11) and the evacuation conduit (18). This last one is a channel along one side of the movable wall (2) which helps to drain the liquid at the time of displacement of the movable wall from displacement cavity (8) toward the piston chamber or vice versa.

[0054] FIG. (1). When rotating the wheel (12), the piston (3) slides along the inner walls of the toroidal camera made of the inner wall (20), bottom of the casing (21) and it's corresponding area on the cap of the pump (FIG. (5)(15)).

[0055] The movable wall (2) located on the bottom of FIG. (1) and FIG. (2-A), is out of the displacement cavity (8) making sealing contact with the rim of the wheel (12) and is limiting the stroke of the piston (3).

[0056] When the wheel (12) rotates in one direction, one side of the piston (3) increases the capacity of the cavity formed between: the movable wall (2) located at the bottom of the FIG. (1), the rim of the wheel (12), the inner wall (20), housing bottom (21) and the surface of the pump cap (FIGS. (3-A, 3-B)(15)).

[0057] By increasing the capacity of this camera, it reduces the pressure, creating a negative pressure which has access to a side face of the wheel (12) through the port of suction (9) and in this part, is the inlet (4), (FIG. (2-A), by where this negative pressure impels the liquid into the pump. Inlet (4) in FIGS. (2-A and 5).

[0058] In FIG. (1), the movable wall (2) located on the top of this figure, is inside the displacement cavity (8) to allow passage to the piston (3) through this area.

[0059] The side of the piston (3) that moves in direction of the movable wall (2) at the bottom of FIG. (1), reduces the space of the cavity formed between: the movable wall (2) located on the bottom of FIG. (1), the rim of the wheel (12), the inner wall (20), bottom of the casing (21) and its equivalent opposite surface on the pump cap (15) FIGS. (3-A, 3-B).

[0060] As the piston reduces the space in the cavity, it forces the contained liquid to flow out through the discharge port (10) in the rim of the wheel, toward the chamber formed between: (FIG. (2-A) one side of the wheel (12) and the pump cap (15). In this chamber, the liquid flows to the outside of the pump body by the outlet (5) in the pump cap.

[0061] The operation of the movable walls (2), at different moments of the rotation of the piston (3) is shown in FIGS. (4-A), (4-B), (4-C) and (4-D). To the right of these figures can see the cam position at the time of rotation.

[0062] In FIGS. (4-A), (4-B), (4-C) and (4-D). The extensions to the left of the rods are inserted into the hole (11) to transmit the movement of the cam to the movable walls (6).

[0063] The pump is located to the left of each of these FIGS. (4A, 4B, 4C, 4D) and shows the front, without cap, to observe the position of the movable walls (2) at different angles of rotation of the piston. Movable walls (2) are within the of displacement cavity (8), in the casing (1) of the pump.

[0064] FIG. (4-A). In this example, the wheel rotates clockwise. The movable walls (2) are out of the displacement cavity (8) and are making contact with the surface of the wheel rim (12), thereby isolating the loading cavity and the discharge cavity of the piston.

[0065] The piston head (that surface which faces the direction of rotation), exerts a force on the fluid that is in that cavity and expels it through the discharge port.

[0066] In FIG. (4-A), the surface opposite to the piston head is moving away from the movable wall (2) located at the bottom and is increasing capacity in this cavity. This creates a negative pressure that suctions the liquid through the inlet port.

[0067] In the piston's (3) trajectory, from the point where it is in FIG. (4-A) to the point shown in the FIG. (4-B), the cam (6) has rotated with the shaft (14) of the wheel (12). It has moved the rod (7) and this in turn shifted the movable wall (2), which is on the top of the figure, into its displacement cavity (8).

[0068] The movable wall (2), located at the top of the FIG. (4-B), is now inside its displacement cavity (8). This will allow the piston (3) clear passage through this zone that is part of its trajectory.

[0069] The movable wall (2) located on the bottom of this figure, remains displaced outwards from its displacement cavity (8) and is making contact with the surface of the wheel rim. This movable wall (2) along with the piston (3) isolate the loading cavity and discharge cavity.

[0070] In FIG. (4-B), the piston (3) is located in front of the displacement cavity (8) at the top of this figure. The side of the piston (3) is longer than the width of the displacement cavity. This prevents the passing of liquid from the discharge cavity to the loading cavity through the displacement cavity.

[0071] On the trajectory traversed by the piston from the position in FIG. (4-B) up to the position shown in FIG. (4-C), the cam rotated along with the wheel shaft and moved the rod which guides the movable wall at the top of this Figure. This in turn withdrew the movable wall out of the displacement cavity and over to the rim of the wheel.

[0072] FIG. (4-C) the piston is at the halfway point of rotation between the movable wall (2) at the top of the Figure and the movable wall (2) that is at the bottom of this Figure.

[0073] FIG. (4-C). The two movable walls (2) are displaced out of the displacement cavity (8) and are making contact with the rim of the wheel (12). In this position, they are isolating, along with the piston (3), the loading cavity and discharge cavity.

[0074] On the trajectory traversed by the piston from its position in FIG. (4-C) to the position shown in FIG. (4-D), the cam (6) has acted on the rods (7) and these in turn shifted the movable wall (2), that is at the bottom of this Figure, inside the displacement cavity (8).

[0075] In FIG. (4-D), the piston (3) crosses the area of the movable wall (2) located at the bottom of this Figure. The movable wall (2) located at the top of this Figure is isolating along with the piston (3), the charge and discharge cavities.

[0076] In FIG. (4-D), the cavity formed between the movable wall (2) located on the top of this figure and the rear side of the piston (3) is the suction cavity. On the other hand, the cavity between the leading face of the piston (3) and the movable wall (2) at the top of the Figure is the discharge cavity.

[0077] While the piston (3) traversed the trajectory from its position in FIG. (4-D) to the position shown in FIG. (4-A), the cam (6) has acted on the rods (7) and these have shifted the movable wall (2) located at the bottom of FIG. (4-A) out of its displacement cavity until it touched the rim of the wheel, hermetically sealing this point on the piston displacement chamber.

[0078] At all times of the piston stroke, the movable walls, along with the piston, maintain both a loading cavity and a discharge cavity. This function is repeated in all revolutions.

[0079] FIG. (3-A) shows the front view of the pump cap (15). And FIG. (3-B) side view of the pump cap. The holes (13) for the screws that hold the pump cap to the casing.

[0080] The cam (6), which is fixed to the shaft (14) and rotates with it on the outside of the cap (15). The rods (7) act with the rotation of cam (6) to move the movable walls (2).

[0081] Still on FIGS. (3-A, 3-B), the pump outlet (5) (or pump inlet depending on the direction of rotation of the wheel).

[0082] The cap for the rod (16) is to seal the area of the pump cap (15), where the slot (17) for the rod is.

[0083] The rod inlet seal (22), is where the rod is inserted on cap of the rod (16). This place has to be sealed avoid leakage of fluid and allow movement of rod.

[0084] FIG. (5) shows all the pump parts, separated in order of assembly, wherein the casing (1) has the axle hole (19) at its inner bottom (21). The axle hole (19) is centrally located to the circumference of its inner wall (20).

[0085] Two displacement cavity (8), each located on both sides of the diameter of the circumference of the casing. Inlet (4) for admission if the wheel (12) rotates clockwise.

[0086] The wheel (12) has the piston (3) on its rim. On one side of the piston (3), we find the suction port (9) which has access to one side of the wheel. On the other side of the piston, the discharge port (10) that has access to the other side of the wheel. Such ports are for suction or discharge of the liquid, depending on the direction of rotation of the wheel. the shaft (14) is located in the center of its circumference. Movable walls (2) are on diametrically opposing sides of the circumference of the wheel.

[0087] The pump cap (15), has at the center of its circumference an axle hole (19) for the shaft (14). The outlet (5) is for output of fluid when the wheel (12) rotates clockwise. The rod (7) passes through the access to the rod (17) and connects to the movable wall (2) on the hole for rod (11).

[0088] In the cam (6) one can see that it has two levels, to act on the contact surfaces of the rods (7). The center shaft (19) is where the shaft (14) of the wheel (12) is inserted. The cam (6) is fixed to the shaft (14) by screw, bolt or other means in order to rotate with the shaft.

[0089] The rods (7) have a deviation in their quadrangular parts. This deviation is to make contact with the two levels of the cam (6). At the other end, bent at an angle, the rods are inserted into the hole for rod (11) and into the movable walls (2).

[0090] The caps of the rods (16) seal the area of the pump cap (15) with the access to the rod (17) by means of the rod inlet seal (22), where the rod (7) is inserted.