KR200255363Y1 - Pump structure - Google Patents

Abstract

The pump comprises a front casing and a rear casing and space is defined between the casings. In addition to the impeller, the end of the shaft extending into the space is supported by a bushing, which makes the impeller rotatable in the space. A wear ring is attached to the front side of the impeller. The front casing defines a bore in which a buffer is movably received axially relative to the front casing. The thrust ring is attached to the buffer and is in contact with the wear ring, whereby the axial movement of the buffer during rotation of the impeller maintains the fluid membrane between the thrust ring and the wear ring. O-rings are mounted on the buffer to provide a cushion between the buffer and the bore to help maintain the fluid membrane.

Description

Pump structure {PUMP STRUCTURE}

The present invention generally relates to a pump, and more particularly to a pump structure comprising a movable, dynamic and automatically adjustable thrust ring assembly to extend the life of the pump.

The conventional pump includes a front casing 100 attached to the rear casing 200 to define an interior space 101 for receiving the impeller 300 as shown in FIG. 5 of the accompanying drawings. The impeller 300 is supported by the shaft and driven by a motor to rotate in the interior space 101. The thrust ring 500 is fixed to the inner side of the front casing 100. The wear ring 400 is attached to the impeller 300 to be in contact with the thrust ring 500. Since there is always a basic gap between the shaft and the bushing, the rotation of the impeller 300 inevitably becomes an eccentric motion. This eccentric movement causes a non-uniform coupling between the thrust ring 500 and the wear ring 400, which breaks the lubrication film between them, which in turn shortens the life time of the wear ring 400.

Therefore, there is a need to provide a pump structure for overcoming the above problems.

Accordingly, an object of the present invention is to provide a pump structure that extends the life by reducing the wear of the wear ring of the impeller.

Another object of the present invention includes an axially movable buffer, the orientation of which can be varied with the wear ring of the impeller, thereby forming a face-to-face contact between the rings during eccentric motion, The buffer also provides for a pump structure that is used to reduce the impact force exerted on the thrust ring by the impeller.

1 is a cross-sectional view of a pump configured according to the present invention incorporating a motor,

2 is a perspective view of the pump of the present invention with the front casing detached from the pump,

3 is a front view of the pump of the present invention,

4 is an exploded view of a pump of the present invention, and

5 is a perspective view of a conventional pump with the front casing removed from the pump.

※ Explanation of codes for main parts of drawing

1: front casing 2: rear casing

3: impeller 4: shaft

5: bushing 7: buffer

8: Drust Ring 9: O Ring

11: bore 12: home

13: projection 31: wear ring

71: turning 72: groove

According to the present invention, the pump of the present invention combines the front casing and the rear casing and space is defined between the casings. In addition to the impeller, the end of the shaft extending into the space is supported by a bushing, which makes the impeller rotatable in the space. A wear ring is attached to the front side of the impeller. The front casing defines a bore within which a buffer is movably received axially relative to the front casing. The thrust ring is attached to the buffer and is in contact with the wear ring, whereby the axial movement of the buffer upon rotation of the impeller facilitates the maintenance of the fluid film between the thrust ring and the wear ring. O-rings are mounted in the buffer to provide cushioning between the buffer and the front casing. This reduces the impact force.

Those skilled in the art will more clearly understand the present invention by reading the following description of the preferred embodiments of the present invention with reference to the accompanying drawings.

Referring to FIG. 1, which shows, in particular, a pump constructed in accordance with the present invention, the pump of the present invention includes a rear casing 2 to which the front casing 1 is attached to define an internal space (not shown). The shaft 4 is retained in the rear casing 2 and supported by the rear casing 2. The end of the shaft 4, which extends into the inner space defined by the front casing 1 together with the impeller 3, is supported by the bushing 5, the bushing between the shaft 4 and the bushing 5. The necessary clearance makes the impeller 3 rotatable in the interior space.

2 to 4, the bore 11 is defined within the front casing 1. A buffer 7 having a generally ring-shaped shape is received in the bore 11. The buffer 7 defines a retaining protrusion 71 spaced at each interval, and a retaining groove 72 is defined between the retaining protrusions. The projections 13 spaced apart at each interval are formed along the periphery of the bore 11, and the grooves 12 are defined between the projections. The buffer 7 holds the buffer 7, as shown in FIG. 3 to retain the buffer 7 in the bore 11, while allowing the axial movement of the buffer 7 relative to the front casing 1. The projection 71 is accommodated in the bore 11 in such a way that the projection 71 is received in the groove 12 of the front casing 1 and the projection 13 of the front casing 1 is received in the retention groove 72 of the buffer 7. do.

The thrust ring 8 is attached to the end face of the buffer 7 opposite the impeller 3, so that when the front casing 1 is mounted on the rear casing 2, it is mounted on the front side of the impeller 3. The wear ring 31 engages with the thrust ring 8. Since the buffer 7 is axially movable relative to the front casing 7, there is no point contact between the wear ring 31 and the thrust ring 8 of the impeller 3 during rotation of the impeller 3. Surface contact may be formed. Moreover, an O-ring 9 is mounted to the buffer 7 to cushion the buffer 7 between the front casing 1. Due to the surface contact between the thrust ring 8 and the wear ring 31 and the cushioning function provided by the O-ring 9, a fluid film formed between the wear ring 31 and the thrust ring 8 is properly formed. Can be maintained, thereby reducing wear of the wear ring 31 and extending its life.

Although the subject innovation has been described in connection with the preferred embodiment, the subject innovation may be modified, modified, and replaced without departing from the scope of the subject matter defined by the appended claims.

According to the pump of the present invention described above, since the axially movable, dynamic, and automatically adjustable thrust ring assembly is provided, the wear of the wear ring of the impeller is reduced, thereby extending the service life of the pump.

Claims (3)

A space is defined between the casings, including the front casing and the rear casing, and the end of the shaft extending into the space with the impeller is supported by the bushing, the bushing makes the impeller rotatable within the space, and wear A ring is attached to the front side of the impeller, the front casing being the pump defining the bore, A buffer contained within the bore and axially movable, wherein the thrust ring is attached to the buffer and in contact with the wear ring such that the axial movement of the buffer during rotation of the impeller results in fluid between the drust ring and the maro ring. A pump structure characterized by promoting retention of a membrane. The method of claim 1, Pump structure, characterized in that the O-ring is mounted on the outside of the buffer. The method of claim 1, The buffer forms a first projection spaced at each interval from each other and a first groove is defined between the first projections, and the front casing forms a second projection spaced at each interval along the periphery of the bore and the second projections. A second groove is defined between, and the buffer is received in the bore in such a manner that the first projection is received in the second groove and the second projection is received in the first groove.