CN201013641Y

CN201013641Y - Magnetic force centrifugal pump separation sleeve

Info

Publication number: CN201013641Y
Application number: CNU2006201480280U
Authority: CN
Inventors: 蔡国华
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-20
Filing date: 2006-10-20
Publication date: 2008-01-30
Anticipated expiration: 2016-10-20

Abstract

The utility model discloses a containment shell of magnetic centrifugal pump, which is a cylindrical containment shell (7) with one end closed; the outer edge of the other end of the containment shell (7) is provided with an installing base (10) which extends externally; the installing base (10) is provided with an installation hole (11). The utility model is characterized in that the outer surface of an inner liner (12) of the containment shell (7) is totally coated by a metal outer cover (13); the liner (12) is made of ceramics; the outer surface of a middle cylinder body (131) of the metal outer cover (13) can be a metal cover with equal or unequal cross section, or rolled and wound by metal wires. The containment shell of magnetic centrifugal pump of the utility model can enhance pressure bearing, reduce eddy and has good high temperature resistant performance.

Description

Magnetic centrifugal pump isolation sleeve

Technical Field

The utility model relates to a magnetic centrifugal pump spacer sleeve.

Background

The magnetic centrifugal pump mainly comprises a pump body, an impeller, a magnetic coupling, an isolation sleeve, a motor and the like, and utilizes the magnetic principle to rotate the impeller by adopting a push-pull magnetic circuit structure so as to realize the non-contact transmission of torque, thereby changing the sealing into static sealing and achieving the function of conveying a medium without leakage. The pump shaft and the impeller of the corrosion-resistant magnetic centrifugal pump which are widely used at present are made of metal materials, the outer surface of the pump shaft and the impeller of the corrosion-resistant magnetic centrifugal pump are coated with fiber reinforced resin layers, an isolation sleeve is arranged between an inner coupler and an outer coupler of the pump shaft in the magnetic centrifugal pump, an inner liner of the pump shaft is made of fiber reinforced resin, and a transparent metal reinforcing net is arranged on the inner liner, so that the pump shaft is suitable for conveying strong corrosive media such as hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid and the like and organic-inorganic mixed acid.

However, the lining of the current isolation sleeve is made of reinforced fiber resin, and the high temperature resistance of the lining is poor; the metal reinforcing net tightly matched with the lining has low pressure bearing, the deformation of the isolation sleeve is easy to cause, the eddy current generated by the metal net in a magnetic field is large, and the power loss is large.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that current spacer sleeve pressure-bearing is not high, the vortex is great, high temperature resistance can be poor to provide one kind improve the pressure-bearing, reduce the vortex, magnetic centrifugal pump spacer sleeve that high temperature resistance can be good.

The utility model discloses a magnetic centrifugal pump spacer sleeve, it is one end confined tube-shape spacer sleeve, the other end outer fringe of spacer sleeve is equipped with the installation base of outside extension, be equipped with the mounting hole on the installation base, wherein the inside lining outward appearance of spacer sleeve is by the complete cladding of metal coat, the inside lining is made by ceramic material.

The utility model discloses an isolation sleeve, wherein the surface of the middle part cylinder of metal overcoat is the metal covering of uniform cross-section.

The utility model discloses an isolation sleeve, wherein the surface of the middle part cylinder body of metal overcoat has a plurality of arriss.

The isolating sleeve of the utility model is characterized in that the middle cylindrical body of the metal jacket is made by tightly winding the metal wire into a cylindrical shape.

After the scheme is adopted, the cylindrical isolation sleeve of the utility model is formed by tightly matching the inner lining and the metal outer sleeve, and the inner lining is made of ceramic materials and plays the roles of corrosion resistance and high temperature resistance; the metal outer sleeve is arranged on the outer surface of the lining and has the function of improving the strength of the isolation sleeve, the middle cylinder of the metal outer sleeve adopts metal wires with reverse S-shaped sections to be mutually buckled and tightly wound into a cylinder, the metal wires are stainless steel wires coated with insulating paint on the surfaces, the resistance of the traditional isolation sleeve is one twenty-ten-thousand times that of a metal winding wire isolation sleeve, and the eddy current of the traditional isolation sleeve is twenty-ten-thousand times that of the winding wire isolation sleeve, so that the winding wire isolation sleeve can greatly reduce the eddy current.

Other details and features of the magnetic centrifugal pump spacer sleeve of the present invention will become apparent from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a reference diagram of the magnetic centrifugal pump spacer sleeve of the present invention in a use state;

FIG. 2 is a schematic structural view of a first embodiment of a spacer sleeve;

FIG. 3 is a schematic structural view of a second embodiment of an isolation sleeve;

FIG. 4 is a schematic structural view of a third embodiment of a spacer sleeve;

fig. 5 is a partially enlarged view of a in fig. 4.

Detailed Description

As shown in fig. 1, the utility model discloses an among the magnetic centrifugal pump spacer sleeve mainly used magnetic centrifugal pump, magnetic centrifugal pump mainly includes the pump body 1, impeller 2, pump shaft 3, well body 4, outer shaft coupling 6 and interior shaft coupling 8, and impeller 2 and interior shaft coupling 4 are installed on pump shaft 3, are equipped with spacer sleeve 7 between interior shaft coupling 6, the outer shaft coupling 8, and spacer sleeve 7 adopts bolt 5 to fix on the terminal surface of well body 4.

Combine fig. 2, fig. 3 and fig. 4 the utility model discloses a structural schematic of the different embodiments of magnetic centrifugal pump spacer sleeve, the one end of cylindric spacer sleeve 7 is sealed, and the other end outer fringe is equipped with the installation base 10 of outside extension, is equipped with mounting hole 11 on the installation base 10, and spacer sleeve 7 is including the two-layer structure of inseparable complex: an inner liner 12 and a metal outer jacket 13. The liner 12 is made of a ceramic material and functions to resist corrosion and high temperatures. The metal jacket 13 is divided into three parts: middle part cylinder 131, blind end 132 and base overcoat 133, wherein blind end metal covering 132 and base overcoat 133 are the metal covering of uniform cross-section in the three embodiments of the utility model, add the effect of metal covering and improve the intensity of isolation cover.

As shown in fig. 2, the structure of the first embodiment of the spacer sleeve of the present invention is schematically illustrated, the middle cylindrical body 131 of the metal outer sleeve 13 is a metal sleeve with a uniform cross section; in another embodiment of the spacer according to the present invention shown in fig. 3, the outer surface of the middle cylindrical body 131 of the metal jacket 13 has an unequal cross section, i.e. the outer surface has a plurality of ridges 14, the ridges 14 may be circumferential or spiral ridges, the concave-convex outer surface substantially reduces the thickness of the metal jacket, and reduces a portion of eddy current formed in the magnetic field, thereby reducing magnetic loss; in a third embodiment of the spacer according to the present invention as shown in fig. 4 and 5, the middle cylindrical body 131 of the metal outer sleeve 13 is formed by mutually fastening and tightly winding the metal wires 16 having the reverse S-shaped cross section into a cylindrical shape, wherein the metal wires 16 are stainless steel wires, the surfaces of which are coated with insulating paint, and then both ends of which are welded to the closed end metal sleeve 132 and the base outer sleeve 133, respectively.

In an embodiment of the spacer sleeve of the present invention, a third mode of winding the wire is preferable because of the power consumption P of the eddy current loss _W Inversely proportional to the resistance R, and the law of resistance

Wherein L represents a wire length and S represents a wire cross-sectional area.

L of the conventional spacer is the spacer length L ₀ S is the sectional area S of the spacer sleeve ₀ (ii) a However, since the length L of the wire is long and the sectional area S is small, the metal winding wire isolation sleeve is generally used in practical applicationL＝200L ₀ ，S＝1/100S ₀ Therefore, the resistance of the traditional isolation sleeve is one twenty-ten-thousand times that of the metal winding wire isolation sleeve, and the eddy current of the traditional isolation sleeve is twenty-ten-thousand times that of the winding wire isolation sleeve, so that the winding wire isolation sleeve can greatly reduce the eddy current, and the power loss is reduced.

Claims

1. The utility model provides a magnetic centrifugal pump spacer sleeve, its be one end confined tube-shape spacer sleeve (7), the other end outer fringe of spacer sleeve (7) is equipped with installation base (10) of outside extension, be equipped with mounting hole (11) on installation base (10), its characterized in that: the outer surface of the inner lining (12) of the isolation sleeve (7) is completely coated by the metal outer sleeve (13), and the inner lining (12) is made of ceramic materials.

2. The insulating sleeve of claim 1, wherein: the outer surface of the middle cylindrical body (131) of the metal outer sleeve (13) is a metal sleeve with a uniform section.

3. The insulating sleeve of claim 1, wherein: the outer surface of the middle cylindrical body (131) of the metal outer sleeve (13) is provided with a plurality of convex edges (14).

4. The insulating sleeve of claim 2, wherein: the middle cylindrical body (131) of the metal outer sleeve (13) is made by tightly winding the metal wire (16) into a cylindrical shape.