RU208962U1 - MAGNETIC CLUTCH CENTRIFUGAL PUMP - Google Patents

Abstract

The utility model relates to magnetic couplings of centrifugal pumps for transmitting torque from the electric motor to the pump and as a shaft seal to eliminate leaks of the pumped liquid, used for pumping fluids, mainly in the oil, oil, petrochemical, chemical, heat and power industries and in public utilities. The magnetic coupling of a centrifugal pump consists of two half-couplings with permanent magnets and a dividing wall between them, made in the form of a glass, covering the driven half-coupling installed at the end of the working shaft of the centrifugal pump and covered by the driving half-coupling installed on the drive shaft of the centrifugal pump, while the permanent magnets are protected by a shell from contact with the external environment, while one of the half-couplings of the magnetic coupling is equipped with a magnetic circuit made in the form of a sleeve for installing permanent magnets on it, while the half-coupling is made of corrosion-resistant high-alloy steel for operation in an aggressive pumping environment.

Description

The utility model relates to magnetic couplings of centrifugal pumps for transmitting torque from the electric motor to the pump and as a shaft seal to eliminate leaks of the pumped liquid, used for pumping fluids, mainly in the oil, oil, petrochemical, chemical, heat and power industries and in public utilities.

Known magnetic coupling of a centrifugal pump, consisting of two half-couplings with permanent magnets and a dividing wall made in the form of a glass, covering one of the half-couplings installed at the end of the working shaft of the centrifugal pump and covered by another half-coupling installed on the drive shaft of the centrifugal pump, the half-couplings contain the same number of permanent magnets and are equipped with a thin protective shell from contact with the external environment, the latter are made in the form of rectangular parallelepipeds and are installed along a circle around the axis of the working shaft and perpendicular to one of the side faces to the radius of the circle along which permanent magnets are installed (RU No. 2326269, publ. 10.06.2008) .

The disadvantage of the magnetic coupling of a centrifugal pump is the limited service life when pumping aggressive media by the pump, due to the fact that the cooling of the driven coupling installed on the shaft of the centrifugal pump is carried out due to the flow of the pumped medium into the space between the driven half-coupling and the glass, thereby not only cooling occurs, but also corrosion of the driven coupling half, which subsequently leads to a breakdown of the magnetic coupling and failure of the entire centrifugal pump.

The task to be solved by the utility model is to improve the quality of manufacture of the magnetic coupling, to eliminate the existing shortcomings.

The technical solution to which the utility model is directed is to increase the reliability and durability of the magnetic coupling of a centrifugal pump through the use of corrosion-resistant high-alloy steel.

The problem is solved, and the technical result is achieved due to the fact that the magnetic coupling of the centrifugal pump consists of two half-couplings with permanent magnets and a separating partition between them, made in the form of a cup, covering the driven half-coupling installed at the end of the working shaft of the centrifugal pump and covered by the driven half-coupling installed on the drive shaft. shaft of the centrifugal pump with a leading half-coupling, while the permanent magnets are protected by a shell from contact with the external environment, while according to the utility model, one of the half-couplings of the magnetic clutch is equipped with a magnetic circuit made in the form of a sleeve for installing permanent magnets on it, while the half-coupling is made of corrosion-resistant high-alloy steel for operation in aggressive pumping environment.

As a filler of the intermagnetic space, for example, putty, glue, compound, etc. can be used.

The magnetic coupling, made in a corrosion-resistant design, can significantly increase the life, performance characteristics in the process of pumping various aggressive media that adversely affect the parts of the magnetic coupling and the centrifugal pump as a whole.

As permanent magnets used in the magnetic coupling, magnets of various shapes, such as rectangular or trapezoidal, can be used.

The utility model is illustrated by the following figures.

Fig. 1. Longitudinal section of a magnetic coupling.

Fig. 2. Cross section of the magnetic coupling.

1. Leading coupling

2. Permanent magnets of the leading coupling half

3. Putty

4. Protective shell of the leading coupling half

5. Driven coupling

6. Sleeve

7. Permanent magnets of the driven half-coupling

8. Protective shell of the driven coupling half

9. Glass

The magnetic coupling of the centrifugal pump consists of a driving half-coupling 1 and a driven half-coupling 5 with permanent magnets 2 and 7, respectively, and a dividing wall made in the form of a glass 9, covering the driven half-coupling 5 installed at the end of the working shaft of the centrifugal pump and covered by the leading half-coupling installed on the drive shaft of the centrifugal pump half coupling 1.

The body of the driven coupling half 5 is made of corrosion-resistant high-alloy steel, on which the sleeve 6 is installed, which is the magnetic circuit for permanent magnets 7 installed on it with glue or putty 3.

The space between the permanent magnets 2 and 7 installed on the half-couplings 1 and 5, respectively, is filled with putty 3 for reliable fixation at the installation site, after which the protective shell 7 and 8 is installed to protect against the effects of the external environment.

The magnetic clutch as part of a centrifugal pump works as follows.

When the drive coupling half 1 rotates, due to the magnetic flux interacting between the permanent magnets 2 and 7, respectively, the driven coupling half 5 is also rotated, transmitting torque to the centrifugal pump shaft, while the use of corrosion-resistant high-alloy steel makes it possible to protect the magnetic coupling, in particular the driven coupling half, from corrosion in the process of exposure to an aggressive pumped liquid.

Claims (1)

Magnetic coupling of a centrifugal pump, consisting of two half-couplings with permanent magnets and a dividing wall between them, made in the form of a glass, covering the driven half-coupling installed at the end of the working shaft of the centrifugal pump and covered by the driving half-coupling installed on the drive shaft of the centrifugal pump, while the permanent magnets are protected by a shell from contact with the external environment, characterized in that one of the half-couplings of the magnetic coupling is equipped with a magnetic circuit made in the form of a sleeve for installing permanent magnets on it, while the half-coupling is made of corrosion-resistant high-alloy steel for operation in an aggressive pumping medium.

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