Device for transmitting power through rotating magnetic fields

Abstract

A device for the transmission of power using rotating magnetic fields includes a drive shaft with an external magnet, a pump shaft with an internal magnet suited to entrained by the external magnet, a rear tight chamber or containment body for the pump shaft and the internal magnet, the rear body being positioned between the internal magnet and external magnet. The rear body includes at least a glass-shaped casing and one or more probes buried within the thickness of the glass-shaped casing.

Claims

1. A device for transmitting power using rotating magnetic fields comprising: a drive shaft; an external magnet fitted on said drive shaft; a pump shaft; an internal magnet fitted on said pump shaft and configured to be entrained by said external magnet; and a rear tight chamber or rear containment body for said pump shaft and said internal magnet, wherein said containment body comprises a cup-shaped casing positioned between said internal magnet and said external magnet, wherein said rear tight chamber or rear containment body consists of a first tight cup-shaped casing forming an external cup-shaped casing made of a non-metallic composite material and having a structural function, and a second cup-shaped casing forming an internal cup-shaped metal casing made and housed in said external cup-shaped casing, said second cup-shaped casing being configured to come directly into contact with a pumped fluid, and further comprising a temperature sensor or probe that includes a miniaturized thermocouple disposed between said first and said second cup-shaped casing.

2. The device according to claim 1, wherein said miniaturized thermocouple is connected to a cable inserted through a duct obtained in said rear tight chamber or rear containment body.

3. The device according to claim 1, further comprising one or more additional sensors or probes configured to monitor operative conditions of the device and positioned between said external cup-shaped casing and said internal cup-shaped casing.

4. The device according to claim 1, wherein said non-metallic composite material is a thermoplastic, thermoset, or ceramic material.

5. The device according to claim 1, wherein said internal cup-shaped casing consists of at least one continuous layer covering an inner surface of said external cup-shaped casing, said at least one continuous layer having been deposited with a chemical or electrochemical process.

6. The device according to claim 1, wherein the device is configured as a magnetic pump, said pump shaft being connected to one or more impellers.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The attached drawings show, by way of a non-limiting example, a practical embodiment of the invention applied to a magnetic pump.

(2) FIG. 1 shows a section of the rear body (1) of the pump, while FIG. 2 shows a detail of the rear body (1) with an installed temperature sensor (7).

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

(3) In one embodiment, the present invention relates to a new magnetic pump comprising a pump body with a drive shaft (2) and at least one external magnet (3) keyed on said drive shaft (2), a pump shaft (4), at least one internal magnet (5) keyed on said pump shaft (4) and suited to be driven by said external magnet (3), a containing rear body (1) of said pump shaft (4) of said internal magnet (5) and one or more impellers, said rear body (1) being positioned between said internal magnet (5) and said external magnet (3).

(4) Said rear body (1) comprises a first hermetically sealed cup-shaped (defined here also as glass-shaped) casing (61), or external cup-shaped (defined here also as glass-shaped) casing, having a structural function, and a second glass-shaped casing (62), or internal glass-shaped casing, housed in said external glass-shaped casing (61) suited to be in direct contact with the pumped fluid.

(5) Said internal glass-shaped casing (62) may for example be made of at least one continuous layer covering the internal surface (611) of said external glass-shaped casing (61), that is, the surface facing said internal magnet (5).

(6) Said continuous covering layer is preferably deposited by chemical and/or electrochemical processes.

(7) As shown in FIG. 2, said rear body (1) comprises at least one temperature sensor (7), in turn comprising a miniature thermocouple (71) interposed between said external glass-shaped casing (61) and said internal glass-shaped casing (62) and installed within the range of the magnetic field, that is, preferably between said external magnet (3) and said internal magnet (5).

(8) Said thermocouple (71) is connected to at least one cable (72) inserted through a duct (73) obtained in said rear body (1).

(9) Alternatively, said thermocouple (71) may be embedded in the thickness of one or both of said internal glass-shaped casing (62) and external glass-shaped casing (61), preferably installed in the magnetic field, that is, between said external magnet (3) and said internal magnet (5).

(10) Therefore, with reference to the preceding description and the attached drawings, the following claims are made.