CN215949918U - Nonmetal impeller subassembly and magnetic drive pump thereof - Google Patents

Abstract

The utility model discloses a nonmetal impeller assembly and a magnetic pump thereof, which comprise a main shaft, a plastic-lined pump body, a plastic-lined pump cover, a sliding bearing sleeve, an inner magnetic rotor body, an isolating sleeve, an outer magnetic rotor, a mounting seat, a front anti-back ring and a rear thrust ring. The impeller assembly comprises an impeller and a transmission sleeve, the transmission sleeve comprises a sleeve body and a central shaft hole, and one end of the sleeve body is inserted and fixed in a mounting hole correspondingly formed in the center of the amplitude plate. The impeller can be manufactured by an injection molding method without arranging a metal embedded part, so that the working efficiency is greatly improved.

Description

Nonmetal impeller subassembly and magnetic drive pump thereof

Technical Field

The utility model relates to a magnetic pump, in particular to a plastic magnetic pump.

Background

The plastic magnetic driving centrifugal pump is a common anticorrosion magnetic pump in chemical industry, smelting and environment-friendly water treatment industry.

As shown in fig. 1, a common structure of a plastic magnetic force driven centrifugal pump with a motor of more than 5.5kW is that an inner rotor magnetic steel 4 and an impeller 1 are in a split structure, the inner rotor magnetic steel and the impeller are connected by a ceramic main shaft 3, the main shaft is supported on a pump cover 2, and the plastic impeller is sleeved on the main shaft. In the prior art, in order to ensure the torsion resistance of the plastic impeller, a metal embedded part 1.1 is required to be additionally arranged in a web plate of the impeller, and in order to prevent the metal embedded part of the impeller from being corroded by conveyed liquid, the metal embedded part is required to be wrapped and sealed in the plastic impeller body. The impeller with the structure is produced by a complex process, the impeller core needs to be positioned, fed and pre-pressed, the impeller core is removed from the positioning die after primary forming, the material is added for secondary pressing, and then the impeller core is demoulded to produce the qualified impeller, so that the process line is complex, and the process flow is complex. The impeller with the structure can not be obtained by injection molding on an injection molding machine, so the production efficiency is very low, and only 2-3 impellers can be produced in one day by one shift by taking a plastic magnetic drive centrifugal pump with an inlet of 80mm as an example.

In order to improve the production efficiency, people adopt the exposed local impeller metal embedded part to enable the metal embedded part to be positioned on the die, so that the impeller with the structure can be produced on an injection molding machine, and the production efficiency is also improved by tens of times. However, when the plastic impeller with the exposed metal core is assembled, the metal core needs to be sealed, so that the metal embedded part of the impeller is prevented from being corroded by liquid, which is a difficult problem. Because the ceramic main shaft adopted by the magnetic drive centrifugal pump has poor thread bearing force and insufficient sealing pressing force on sealing metal on the impeller, once the centrifugal pump is started to work, the metal embedded part of the impeller is loosened and enters acid to corrode.

Therefore, the magnetic drive centrifugal pump plastic impeller of the metal embedded part full-wrapping structure still continues to be used in the industry, still stays at the level of manual manufacture and low production efficiency, cannot be used for manufacturing the impeller of the magnetic pump by utilizing the existing common numerical control injection molding technology, and needs to be further improved.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the nonmetal impeller assembly and the magnetic pump thereof, which do not need to be provided with a plastic impeller metal embedded part, can be used for manufacturing the impeller by an injection molding method, improve the working efficiency by nearly ten times, do not generate impeller corrosion, can be compatible with a ceramic shaft and are convenient to install.

In order to realize the purpose of the utility model, the following technical scheme is provided: a non-metal impeller assembly comprises an impeller consisting of a web and blades on the web, and is characterized in that a transmission sleeve is additionally arranged, the transmission sleeve comprises a sleeve body and a central shaft hole, and one end of the sleeve body is inserted and fixed in a mounting hole correspondingly formed in the center of the web.

Preferably, the outer diameter of one end of the sleeve body is provided with arc-shaped grooves in a radial array around the circle center to form a gear shape, and the center mounting hole of the web plate is correspondingly provided with the arc-shaped grooves so as to couple and connect the web plate and the web plate.

Preferably, convex strips are radially arrayed around the circle center on the outer diameter of one end of the sleeve body, and concave strips are correspondingly arranged in the center mounting hole of the web plate, so that the convex strips and the concave strips are in concave-convex coupling connection.

The concave-convex shape is coupled and matched with the concave-convex shape on the transmission ring, and plays a role in conducting the rotating torque on the main shaft.

Preferably, the transmission sleeve is made of a non-metal material or an acid-resistant metal.

Preferably, the non-metallic material is phenolic glass fiber reinforced plastic or polyphenylene sulfide or polyvinylidene fluoride.

Preferably, the impeller is an open impeller or a closed impeller.

Preferably, the central axial bore is square or hole-shaped with a torque-proof plane.

To achieve the object of the present invention, there is provided a magnetic pump characterized in that a non-metallic impeller assembly is applied to the magnetic pump.

The magnetic pump comprises a main shaft, a plastic-lined pump body, a plastic-lined pump cover, a sliding bearing sleeve, an inner magnetic rotor body, an isolation sleeve, an outer magnetic rotor, a mounting seat, a front check ring and a rear thrust ring.

Preferably, the plastic-lined pump cover is made of polypropylene materials, the pump cover is wrapped with a metal embedded part, and a middle hole is machined in the pump cover.

The utility model has the beneficial effects that: the transmission sleeve with the torsion transmission function is arranged on one side of the impeller, so that the torsion on the main shaft is transmitted to the impeller through the transmission sleeve, the impeller is driven by magnetic force to rotate to do work, liquid is conveyed, and the necessity of embedding a metal embedded part in the impeller is eliminated, so that an impeller assembly can be injection molded on an automatic injection molding machine, the production efficiency of the impeller can be greatly improved, and the corrosion resistance of the centrifugal pump can be improved.

Drawings

Fig. 1 is a schematic structural view of a plastic magnetic pump in the prior art.

Fig. 2 is a schematic structural view of embodiment 1.

Fig. 3 is a front view of the impeller of fig. 2.

Fig. 4 is a left side view of fig. 3.

Fig. 5 is a front view of the drive sleeve of fig. 2.

Fig. 6 is a left side view of fig. 5.

Fig. 7 is a front view of an impeller of embodiment 2.

Fig. 8 is a left side view of fig. 7.

Fig. 9 is a front view of the drive sleeve of embodiment 2.

Fig. 10 is a sectional view taken along line a-a of fig. 9.

Fig. 11 is a schematic structural view of a pump cover according to embodiment 1.

Fig. 12 is a schematic structural view of the magnet rotor in embodiment 1.

Fig. 13 is a right side view of fig. 12.

Detailed Description

Example 1: as shown in fig. 2 to 5, the magnetic pump includes a main shaft 4, a plastic-lined pump body 1, a plastic-lined pump cover 3, a sliding bearing sleeve 12, an internal magnetic rotor 5, an isolation sleeve 6, an external magnetic rotor 7, a mounting seat 8, a front anti-back ring 10, and a rear anti-thrust ring 11, and the mounting structure thereof is a conventional mounting manner in the prior art, and is specifically manufactured as follows: the main shaft 4 is made of silicon carbide materials, the pump cover 3 is made of polypropylene materials, as shown in figure 11, a metal embedded part 3.1 is wrapped in the pump cover 3, and a middle hole 3.2 is machined in the pump cover.

The sliding bearing sleeve 12 is made of a material filled with tetrafluoro or carbon graphite according to the figure.

The inner magnetic rotor 5 is made of neodymium iron boron magnetic steel which is wrapped and sealed by fluorinated ethylene propylene according to the requirements of the figure.

The inner magnet rotor 5 is provided with a central bore, the central bore 5.1 being provided with a circular shape with cut edges (see fig. 12, 13) for the purpose of preventing rotation.

The isolation sleeve 6 is obtained by selecting polyvinylidene fluoride and performing mold opening injection molding by using an injection molding process.

The manufacturing method of the external magnetic steel 7 and the mounting seat 8 is the same as that of the magnetic pump in the prior art.

The nonmetal impeller component comprises an open impeller 2 consisting of a web 2.1 and blades 2.2 on the web 2.1, wherein the open impeller 2 is obtained by injection molding of a polypropylene cutting injection mold, a transmission sleeve 9 is arranged behind the open impeller 2, the transmission sleeve 9 is obtained by hot pressing of a phenolic glass fiber reinforced plastic cutting steel mold, the transmission sleeve 9 comprises a sleeve body 9.1 and a central shaft hole 9.2, the central shaft hole 9.2 is square, arc-shaped grooves 9.1.1 are formed on the outer diameter of one end of the sleeve body 9.1 around the circle center in a radial array mode to form a gear shape, and the arc-shaped grooves 2.1.2 are correspondingly formed in a central mounting hole 2.1.1 of the web 2.1, so that the two are in coupling connection.

After the components are manufactured, the components can be assembled, a sliding bearing sleeve 12 is installed in a middle hole of a pump cover 3, an inner magnetic rotor body 5 and a rear thrust ring 11 are respectively installed on a main shaft, the main shaft is sleeved in the middle hole of the sliding bearing 12, a front check ring 10, a transmission sleeve 9, an open impeller 2 and a shaft splicing cap 13 are respectively installed in sequence, a pump shell 1, an isolation sleeve 6 and an installation seat 8 are assembled together, and a cushion bed is additionally arranged on each part. The mounting base 8 is fastened and connected with the pump shell 1 by bolts, and then procedures such as debugging, painting, packaging and the like are carried out, so that the plastic magnetic drive centrifugal pump can be obtained. The mounting structure of the transmission sleeve 9 means that the transmission sleeve is pressed and fixed between the impeller 2 and the limiting step 4.1 on the main shaft by the shaft splicing cap 13.

Example 2: referring to embodiment 1, as shown in fig. 7-10, the remaining features are unchanged, convex strips 9.1.2 are radially arrayed around the center of a circle on the outer diameter of one end of the sleeve body 9.1, and concave strips 2.1.3 are correspondingly arranged in the central mounting holes 2.1.1 of the web 2.1, so that the convex strips and the concave strips are in concave-convex coupling connection.

The above embodiments are only preferred embodiments of the present invention, and the material of the transmission ring may be non-metallic material with good rigidity and corrosion resistance, such as phenolic glass fiber reinforced plastic, polyphenylene sulfide, polyvinylidene fluoride, or acid-resistant metal alloy. The centrifugal pump can be of a plastic lining type or a full plastic type, and the utility model is within the scope of the utility model. The main shaft can be made of ceramic materials or other materials.

Claims (9)

1. A non-metal impeller assembly comprises an impeller consisting of a web and blades on the web, and is characterized in that a transmission sleeve is additionally arranged, the transmission sleeve comprises a sleeve body and a central shaft hole, and one end of the sleeve body is inserted and fixed in a mounting hole correspondingly formed in the center of the web.

2. The non-metallic impeller assembly as claimed in claim 1, wherein the outer diameter of one end of the sheath body is formed with arc-shaped grooves radially arrayed around the center of the circle to form a gear shape, and the central mounting hole of the web is correspondingly formed with arc-shaped grooves to couple the two.

3. The non-metallic impeller assembly of claim 1, wherein the sheath has a radial array of raised ribs on the outer diameter of one end of the sheath surrounding the center of the circle, and the central mounting hole of the web has corresponding recessed ribs for male-female coupling.

4. A non-metallic impeller assembly in accordance with claim 1 wherein the drive sleeve is made of a non-metallic material or an acid resistant metal.

5. A non-metallic impeller assembly according to claim 4, wherein the non-metallic material is phenolic glass reinforced plastics or polyphenylene sulphide or polyvinylidene fluoride.

6. A non-metallic impeller assembly according to claim 1 wherein the impeller is an open impeller or a closed impeller.

7. A non-metallic impeller assembly according to claim 1, wherein the central axial bore is square or hole-shaped with anti-twist flats.

8. A magnetic pump using the non-metallic impeller assembly of any of claims 1-7, comprising a main shaft, a plastic-lined pump body, a plastic-lined pump cover, a sliding bearing sleeve, an inner magnetic rotor body, an isolation sleeve, an outer magnetic rotor, a mounting seat, a front anti-back ring, and a rear anti-thrust ring.

9. The magnetic pump of claim 8, wherein the plastic-lined pump cover is made of polypropylene, the pump cover is wrapped with metal embedded parts, and a central hole is processed on the pump cover.

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