MAGNETIC PUMP WITH INNER MAGNETIC WHEEL STRUCTURE

Description

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a pump and, more particularly, to a magnetic pump with an inner magnetic wheel structure.

Description of the Related Art

A magnetically driven pump is mainly made of plastic material and is driven by a magnetic force. The magnetically driven pump has an enhanced sealing effect so that the medium delivered by the magnetically driven pump has a better air-tight effect. A conventional magnetically driven pump comprises a shaft, gaskets, and bearings which cooperate to drive an impeller to move at a high speed through transmission of the shaft, the gaskets, and the bearings, thereby completing the normal function of the pump body. In general, the shaft and the gaskets made of ceramic material, and the bearings are made of wear-resistant plastic material. However, a friction force easily causes a structural damage or an excessive wear when the shaft is rotated relative to the bearings during a long-term utilization, thereby decreasing the air-tight effect.

BRIEF SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a magnetic pump having an improved friction effect.

In accordance with the present invention, there is provided a magnetic pump comprising an inner magnetic wheel, two high hardness gaskets, a high hardness shaft, a pump front cover, a first high hardness bearing, a pump rear cover, and a second high hardness bearing. The inner magnetic wheel defines a rotation space, a first bearing space, and a second bearing space. The first bearing space is located on a first side of the rotation space. The second bearing space is located on a second side of the rotation space. The two high hardness gaskets are located adjacent to the first bearing space and the second bearing space respectively. The high hardness shaft is mounted in the rotation space. The high hardness shaft extends through the two high hardness gaskets. The pump front cover defines a first pivot groove. The first high hardness bearing is mounted in the first pivot groove. The high hardness shaft extends through a first one of the two high hardness gaskets and is pivotally mounted on the first high hardness bearing. The pump rear cover defines a mounting space and a second pivot groove. The inner magnetic wheel is placed into the mounting space. The second pivot groove lies in the mounting space. The second high hardness bearing is mounted in the second pivot groove. The high hardness shaft extends through a second one of the two high hardness gaskets and is pivotally mounted on the second high hardness bearing. Thus, the first high hardness bearing and the second high hardness bearing pivotally connect the high hardness shaft and enhance a friction effect of the high hardness shaft. Preferably, the high hardness shaft, the two high hardness gaskets, the first high hardness bearing, and the second high hardness bearing are made of material selected from silicon carbide or zirconium oxide.

According to the primary advantages of the present invention, the high hardness shaft, the two high hardness gaskets, the first high hardness bearing, and the second high hardness bearing construct a rotating core of the magnetic pump and are made of material with high hardness, so that the first high hardness bearing and the second high hardness bearing pivotally connect the high hardness shaft to enhance the friction efficiency, thereby extending the overall service life, and thereby significantly reducing the cost of regular repair and replacement.

Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

FIG. 1 is a cross-sectional view of a magnetic pump in accordance with the preferred embodiment of the present invention.

FIG. 2 is an exploded cross-sectional view of the magnetic pump in accordance with the preferred embodiment of the present invention.

FIG. 3 is a partial exploded cross-sectional view of the magnetic pump in accordance with the preferred embodiment of the present invention.

FIG. 4 is a cross-sectional view showing the magnetic pump combined with an outer magnetic rotor.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIGS. 1-3, a magnetic pump 1 in accordance with the preferred embodiment of the present invention comprises an inner magnetic wheel 10, two high hardness gaskets (or washers) 14, a high hardness shaft 13, a pump front cover 11, a first high hardness bearing 15, a pump rear cover 12, and a second high hardness bearing 16.

The inner magnetic wheel 10 defines a rotation space 100, a first bearing space 102, and a second bearing space 104. The first bearing space 102 is located on a first side of the rotation space 100. The second bearing space 104 is located on a second side of the rotation space 100.

The two high hardness gaskets 14 are located adjacent to the first bearing space 102 and the second bearing space 104 respectively. The high hardness shaft 13 is mounted in the rotation space 100. The high hardness shaft 13 extends through the two high hardness gaskets 14.

The pump front cover 11 defines a first pivot groove 110. The first high hardness bearing 15 is mounted in the first pivot groove 110. The high hardness shaft 13 extends through a first one of the two high hardness gaskets 14 and is pivotally mounted on the first high hardness bearing 15.

The pump rear cover 12 defines a mounting space 120 and a second pivot groove 122. The inner magnetic wheel 10 is placed into the mounting space 120. The second pivot groove 122 lies in the mounting space 120. The second high hardness bearing 16 is mounted in the second pivot groove 122. The high hardness shaft 13 extends through a second one of the two high hardness gaskets 14 and is pivotally mounted on the second high hardness bearing 16.

Thus, the first high hardness bearing 15 and the second high hardness bearing 16 pivotally connect the high hardness shaft 13 and enhance a friction effect of the high hardness shaft 13. Preferably, the high hardness shaft 13, the two high hardness gaskets 14, the first high hardness bearing 15, and the second high hardness bearing 16 are made of material selected from silicon carbide or zirconium oxide (zirconia).

In the preferred embodiment of the present invention, the high hardness shaft 13 has two ends extending through the two high hardness gaskets 14 respectively. The high hardness shaft 13 defines two pivoting contact sections 130 formed on the two ends thereof, wherein a first one of the two pivoting contact sections 130 is pivotally mounted on the first high hardness bearing 15 and extends through the first one of the two high hardness gaskets 14, and a second one of the two pivoting contact sections 130 is pivotally mounted on the second high hardness bearing 16 and extends through the second one of the two high hardness gaskets 14.

In the preferred embodiment of the present invention, the two high hardness gaskets 14 are secured to the inner magnetic wheel 10. The first one of the two high hardness gaskets 14 is located on a side of the first bearing space 102, and the second one of the two high hardness gaskets 14 is located on a side of the second bearing space 104. The two high hardness gaskets 14 are mounted on the high hardness shaft 13, so that the two high hardness gaskets 14 and the high hardness shaft 13 are rotated synchronously.

In the preferred embodiment of the present invention, the inner magnetic wheel 10 has an outside provided with multiple magnetic members 106 surrounding the inner magnetic wheel 10. Preferably, each of the magnetic members 106 is a magnet.

In the preferred embodiment of the present invention, the pump rear cover 12 is made of non-conducting or insulating material.

In the preferred embodiment of the present invention, the first high hardness bearing 15 is inserted into the first bearing space 102 of the inner magnetic wheel 10, and the second high hardness bearing 16 is inserted into the second bearing space 104 of the inner magnetic wheel 10.

Referring to FIG. 4 with reference to FIGS. 1-3, the pump rear cover 12 and the inner magnetic wheel 10 of the magnetic pump 1 are assembled to construct an inner magnetic rotor which is directly placed into an outer magnetic rotor 2. The outer magnetic rotor 2 defines a receiving space 20 for accommodating the pump rear cover 12. The receiving space 20 has an inner wall provided with multiple magnetic elements 22. Preferably, each of the magnetic elements 22 is a magnet. There is no structural interference between the pump rear cover 12 and the outer magnetic rotor 2. Thus, the pump rear cover 12 and the outer magnetic rotor 2 achieve a magnetic drive by an interaction between the magnetic members 106 and the magnetic elements 22.

Accordingly, the high hardness shaft 13, the two high hardness gaskets 14, the first high hardness bearing 15, and the second high hardness bearing 16 construct a rotating core of the magnetic pump 1 and are made of material with high hardness, so that the first high hardness bearing 15 and the second high hardness bearing 16 pivotally connect the high hardness shaft 13 to enhance the friction efficiency, thereby extending the overall service life, and thereby significantly reducing the cost of regular repair and replacement.

Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the scope of the invention.