WO2009127951A2

WO2009127951A2 - Fluid handling device

Info

Publication number: WO2009127951A2
Application number: PCT/IB2009/005259
Authority: WO
Inventors: Alvaro Figna
Original assignee: F.A. Techno S.R.L.
Priority date: 2008-04-17
Filing date: 2009-04-16
Publication date: 2009-10-22
Also published as: WO2009127951A3; ITBO20080237A1

Abstract

The fluid handling device comprises a fixed, prismatic' sleeve -shaped, box-like body (2), a cylinder- shaped rotating body (5) accommodated inside the box- like body (2) to divide the interior of the box- like body (2) into two reciprocally water- sealed chambers (6 and 7), a motor (8) adapted to determine the rotation of the rotating body (5) about a rotation axis (X), a central hole (11) defined in the rotating body (5) along the rotation axis (X), a plurality of radial holes (12) made in the rotating body (5), which radially originate from the central hole (11) to the exterior of the rotating body (5) and a plurality of pistons (21), each of which is adapted to slide along a respective radial hole (12). Each piston (21) is associated with means (22,18) adapted to determine the stroke of the piston itself along the respective radial hole (12).

Description

FLUID HANDLING DEVICE

TECHNICAL FIELD

The present invention' relates to a fluid handling device.

BACKGROUND ART

As known, fluid handling devices may be defined by a compressor or pump. There are various types of compressors and pumps on the market, suitable for a variety of uses. In all cases, these compressors or pumps, either with pistons or other, need to be provided with valves, which should be synchronized with the piston or moving member handling. Furthermore, in the current compressors or pumps, one of the greatest existing problems consists in the high inertia of the moving members, which does not allow to develop high rotation speeds of these moving members and high accelerations thereof. Another negative feature which exists in the current compressors and pumps is that they should present constructional solutions related to their use and especially to the handled fluid. Essentially, there is a corresponding fluid handling device for each use and for each fluid.

DISCLOSURE OF INVENTION

It is the object of the present invention to provide a fluid handling device which is free from the aforesaid drawbacks .

According to the present invention, a fluid handling device is implemented, characterized in that it comprises: a fixed, prismatic sleeve-shaped, box-like body; a cylinder-shaped rotating body accommodated inside said box- like body and adapted to divide the interior of said box- like body into two reciprocally water-sealed chambers, the fluid being adapted to be pumped from said first chamber to said second chamber; a motor adapted to determine the rotation of said rotating body about a rotation axis; a central hole defined in said rotating body along said rotation axis,- a plurality of radial holes made in said rotating body, which radially originate from said central hole to the exterior of said rotating body; a plurality of pistons each of which is adapted to slide along a respective radial hole; and means for determining the stroke of said pistons along the respective radial hole .

BRIEF DESCRIPTION OF THE DRAWINGS

The following example is provided by way of non- limiting illustration, for a better understanding of the invention with the aid of the figures in the accompanying drawing, in which: figure 1 is a partial, perspective view of a device made according to the dictates of the present invention; figures 2 and 3 are sections taken along different planes of the device in figure 1 in a first step of o'perating; and figures 4 and 5 are sections taken along different planes of the device in figure 1 in a second step of operating.

BEST MODE FOR CARRYING OUT THE INVENTION With reference to the accompanying figures, numeral 1 indicates as a whole a fluid handling device. The device 1 comprises a fixed, prismatic sleeve-shaped box- like body 2 defined by two pairs of side walls 3 and 4 parallel to each other; the side walls 3 being wider than the contiguous side walls 4. The device 1 comprises a cylinder-shaped body 5 accommodated inside the box- like body 2 and adapted to divide the interior of the body 2 in two reciprocally water-sealed chambers 6 and 7; the fluid being adapted to be pumped from a chamber 6 or 7 to the other chamber 7 or 6. The body 5 is rotational, as will be better seen below, about a rotation axis X by means of a motor 8, e.g. an electric motor; the axis X being the central axis of the body 5. The external diameter of the body 5 is slightly larger than the distance between the side walls 4, and therefore, at the body 5, they have a respective segment deformed according to a circumference arc.

With reference with figures 2 and 3, the body 5 has a central through hole 11 defined along the axis X and three radial holes 12 which radially originate from the hole 11 and are open outwards; the holes 12 being reciprocally angled by 120°. The central hole 11 is closed on one side by a plate 13 (inside the body 2) and on the opposite side by a second plate 14, again inside the body 2, as shown in figures 4 and 5. The plate 13 is integral with the body 5, for example, by means of an adhesive and is in one piece with a rotating shaft 15, which extends outwards from the body 2 through a through hole 19 made in a first wall 3. The shaft 15 is then angularly connected to the output shaft 16 of the motor 8. The plate 14 is also adapted to close a through hole 17 made in the second wall 3 to allow the body 5 to be introduced into the body 2. The plate 14 is integral with the body 2 and has a pin 18 in one piece, which extends into the hole 11 along an axis parallel to axis X.

With reference to the accompanying figures, a respective piston 21 is adapted to slide within the holes 12 , the piston being provided with a respective connecting rod 22 and a first end hinged to the corresponding piston 21 and a second end hinged to the pin 18. It is apparent that the pistons 21 will slide along the respective holes 12 by rotating the body 5, the pin 18 being fixed. Now, the position of the pin 18, the length of the holes 12, the length of the piston 22 and the length of the connecting rods 22 have been selected so that the pistons 21 are, in the respective hole 12, at the top dead center when the hole 12 faces a first wall 4 (exactly at the deformed segment) , and at the bottom dead center when the hole 12 faces the second wall 4 (exactly at the deformed segment) . Furthermore, the stroke of the pistons 21 is double the distance between the axis X (rotation axis of the body 5) and the axis of the pin 18.

In use, assuming that the body 5 rotates anticlockwise observing figure 2, and when the hole 12 opens towards the chamber 6, the corresponding piston 21 shifts towards its bottom dead center, and thus the fluid fills the hole 12. On the other hnad, by continuing the rotation, when the hole 12 opens towards the chamber 7 (figure 3) , the corresponding piston 21 shifts towards the top dead center, thus pressing the fluid towards the chamber 7.

The advantages achieved by implementing the present invention are apparent from the description above. Specifically, a device of simple construction which is not subjected to inertia forces is made. Accordingly, the rotation speed of the body 5 may be even high, and however higher than the normal piston pumps, and furthermore the body 5 may be also subjected to strong accelerations without any problems.

It is finally apparent that changes and variants may be made to the device 1 described and shown herein, without departing from the protective scope of the present invention.

Specifically, the number of holes 12, and thus of pistons 21, may be different from that described and shown, notwithstanding the principle that these holes 12 are uniformly distributed in the rotating body 5. Some parts of the device 1, and specifically those in contact with the fluid, could be made of a material resistant to possible chemical aggressions by the fluid itself. Furthermore, a fixed cam could be installed instead of the connecting rods 22, its contact with a part of the piston being adapted to determine the stroke of the same; the continuous contact between piston and cam being ensured by appropriate spring means .

Claims

1. A fluid handling device, characterized in that it comprises: a fixed, prismatic sleeve-shaped box-like body (2) ; a cylinder- shaped rotating body (5) accommodated inside said box- like body (2) and adapted to divide the interior of said box-like body (2) into two reciprocally water-sealed chambers (6 and 7) , the fluid being adapted to be pumped from said first chamber (6 or 7) to said second chamber (7 or 6) ; a motor (8) adapted to determine the rotation of said rotating body (5) about a rotation axis (X) ; a central hole (11) defined in said rotating body (5) along said rotation axis (X) ; a plurality of radial holes (12) made in said rotating body (5) , which radially originate from said central hole (11) to the exterior of said rotating body (5) ; a plurality of pistons (21) , each of which is adapted to slide along a respective radial hole (12) ; and means for determining the stroke of said pistons along the respective radial hole (12) .

2. A device according to claim 1, characterized in that said means, for each of said pistons (21) , comprise a respective connecting rod (22) ; said connecting rods

(22) being hinged onto a fixed pin (18) with axis parallel to and at a predetermined distance from said rotation axis (X) .

3. A device according to claim 1, characterized in that said means comprise a fixed cam, its contact with a part of said piston being adapted to determine the stroke of the same; the continuous contact between said piston and said cam being ensured by appropriate spring means .

4. A device according to claim 2 or 3 , characterized in that said box- like body (2) comprises two first side walls (3) parallel to each other and two second side walls (4) parallel to each other and orthogonal to said first side walls (3) ; the external diameter of said rotating body (5) being substantially equal to the distance between said first side walls (3) .

5. A device according to claim 4 , dependent from claim 2, characterized in that the lengths of said radial holes (12) , pistons (21) and connecting rods (22) determine that each said piston (21) is at a top dead center at a first of said first side walls (3) , and at a bottom dead center at a^' second of said first side walls (3) .

6. A device according to claim 5, characterized in that the stroke of said pistons (21) is double the distance between said rotation axis (X) and the axis of said pin (18) .

7. A device according to any one of the preceding claims, characterized in that said radial holes (12) are uniformly distributed in said rotating body (5) .

8. A device according to any one of the preceding claims, characterized in that said rotating body (5) is provided with a shaft (15) rotating about said rotation axis (X) , which extends outwards from said box-like body (2) for the connection to an outlet shaft (16) of said motor (8) .