RU209372U1 - 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. Magnetic coupling of a centrifugal pump, consisting of two half-couplings with permanent magnets and a separating partition 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, permanent magnets are installed on the half-couplings along circumference, while according to the utility model in the gaps between the side surfaces of the permanent magnets on one half-coupling there are prismatic inserts made of non-magnetic material, and on the other half-coupling there are permanent magnets without gaps, while the permanent magnets are protected by a shell from contact with the external 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 coupling halves with permanent magnets and a dividing wall made in the form of a glass, covering one of the coupling halves installed at the end of the working shaft of the centrifugal pump and covered by another coupling half mounted on the drive shaft of the centrifugal pump, permanent magnets are installed on the coupling halves along circles, the gaps between the side surfaces of the permanent magnets of each coupling half are filled with glue (RU No. 55907, publ. 27.08.2006).

The disadvantage of the magnetic coupling of a centrifugal pump is low reliability due to the influence of temperature, vibration, and other factors, which affects the decrease in adhesion of the adhesive used to fill the intermagnetic space, which leads to cracking and destruction and further displacement of the magnets on the half-coupling housing.

The objective of 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.

The problem is solved, and the technical result is achieved due to the fact that the magnetic coupling of the centrifugal pump, consisting of two half-couplings with permanent magnets and a separating partition 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 half-coupling installed on the the drive shaft of the centrifugal pump with a driving half-coupling, permanent magnets are installed on the half-couplings around the circumference, while according to the utility model, in the gaps between the side surfaces of the permanent magnets, prismatic inserts made of non-magnetic material are installed on one half-coupling, and permanent magnets are installed on the other half-coupling without gaps, while the permanent magnets are protected by a shell from contact with the external environment.

As permanent magnets used in the magnetic coupling, magnets of various shapes can be used, for example (segmental, trapezoidal, rectangular parallelepiped).

The utility model is illustrated by the following figures.

Fig. 1 - longitudinal section of the magnetic coupling.

Fig. 2 - cross section of the magnetic coupling.

1. Leading coupling

2. Permanent magnets of the leading coupling half

3. Prismatic insert

4. Protective shell of the leading coupling half

5. Driven coupling

6. Permanent magnets of the driven half-coupling

7. Protective shell of the driven half-coupling

8. Glass

The magnetic coupling of the centrifugal pump consists of two half-couplings 1 and 5 with permanent magnets 2 and 6 and a dividing wall made in the form of a cup 8, enclosing the driven half-coupling 5 installed at the end of the working shaft of the centrifugal pump and covered by the driving half-coupling 1 installed on the drive shaft of the centrifugal pump.

Permanent magnets 2 are installed on the body of the leading half-coupling 1 alternately with prismatic inserts 3 installed along the axis of the half-coupling, according to the principle (magnet (NS) - prismatic insert - magnet (SN) - prismatic insert).

The prismatic insert 3 is made of non-magnetic material and is welded at the ends to the body of the leading coupling half 1.

The housing of the driven half-coupling 5 is made in the form of a polyhedron, on each face of which permanent magnets 6 are installed without gaps relative to each other, according to the principle (magnet (NS) - magnet (SN)).

Permanent magnets 2 and 6 are installed on half-couplings 1 and 5 and are protected from external influences by means of a protective shell 4 and 7.

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 shaft of the centrifugal pump.

The magnetic coupling in this version eliminates the displacement of magnets relative to the mounting location on the housing of the coupling halves, ensures high reliability and durability when transmitting torque from the drive shaft to the working shaft of the centrifugal pump.

Claims (1)

Magnetic coupling of a centrifugal pump, consisting of two half-couplings with permanent magnets and a separating partition 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, permanent magnets are installed on the half-couplings along circle, characterized in that in the gaps between the side surfaces of the permanent magnets on one half-coupling there are prismatic inserts made of non-magnetic material, and on the other half-coupling there are permanent magnets without gaps, while the permanent magnets are protected by a shell from contact with the external environment.

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