Diaphragm circulator

Abstract

A diaphragm circulator for liquid material having an internal circuit provided with at least one material intake orifice for discharging the material. The circulator body defines a propulsion chamber with rigid walls between which a deformable diaphragm is placed in such a way that the edge thereof is adjacent to the intake oriface and the edge is adjacent to the discharge orifice for forming a ripple carrier. A diaphragm-exciting member is arranged on the side of the intake orifice for producing a reciprocating motion on the corresponding diaphragm edge in such a way that the ripple is generated and is provided with the circulator rigid walls which are arranged inside free ripple amplitude envelope surfaces extending along the diaphragm. The diaphragm is associated by at least one edge thereof with means for generating a tension therein at least while the ripple is generated in such a way that during the operation, the diaphragm tension on the side of the discharge orifice is greater than on the side of the intake orifice.

Description

BACKGROUND OF THE INVENTION[0001](1) Technical Field[0002]This invention relates to a diaphragm circulator and, more generally, to a device whereby mechanical power is converted into hydraulic power, i.e., the product of the flow rate multiplied by the pressure, for a liquid or gaseous fluid charged or uncharged with particles, or for any material capable of flowing (divided, powdery, fluidized or emulsified materials).[0003](2) Description of the Prior Art[0004]There are numerous types of pumps, suction devices, compressors, fans . . . which perform this function. A new technique has recently appeared for providing this function, at least for a liquid, by means of a diaphragm acting as an intermediate means of converting (a transfer medium) mechanical power (the integral over a time interval of the product of force multiplied by displacement) into hydraulic power (the integral over the same interval of the product of flow rate multiplied by pressure), this transfer occurring by way...

AI Technical Summary

Benefits of technology

[0019]In this embodiment, a circulation stage is created on each side of the diaphragm, which, all things otherwise being equal, makes it possible to obtain a greater pump pressure performance or, at equal performance, to be capable of choosing a diaphragm material which has a lower modulus of elasticity but which is better suited to the chemical specifications of the application. In particular, this increased performance can be obtained with the over dimensions being unchanged. In another embodiment, the circulator comprises a disk-shaped diaphragm the outer periphery of which is attached to a moving excitation assembly which is guided along an axis perpendicular to the plane of the diaphragm by a centre guide column integral with the circulator body. This type of excitation device is advantageous because it concentrates all of the motorizing and guiding functions at the central axis of the circulator, functions which can be provided at reduced dimensions, which enables them to be obtained at a low cost. The motorization and guidance of the moving parts are in fact the most costly functions of the circulator. For example, it is easy to motorize by means of a plunger core electromagnet with a return spring, the core, which slides along the guide column, being attached to a stirrup clamp for the connection thereof to the periphery of the diaphragm, thereby forming the moving assembly.

[0021]The circulator according to the invention can have a substantially cylindrical body which defines several superimposed propulsion spaces connected in series between an inlet port and a discharge port, the diaphragms of each space being attached via the outer edge thereof to a single moving motorization assembly. In this way, a circulator is obtained with compact design, which is capable of supplying a fluid under high pressure.

[0027]Mention should also be made of one advantageous application of this circulator for cooling electronic components and boards. As a matter of fact, these latter are increasingly more powerfully, compact as a result of the miniaturization thereof, and built into any computer, such as a portable or non-portable personal computer, or a computer on-board a vehicle. In this application, at least one of the walls of the circulation chamber forms a radiator for the component being cooled. It is thus swept by the air propelled into this chamber. It may likewise be textured with relief surfaces, small-size fins or ribs which increase the transfer surface.

Problems solved by technology

The dimensional characteristic of the diaphragm would not be achieved if, for example, the edge of the centre hole thereof were provided with radial incisions, which would destroy the expansion resistance of the opening.

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