JP2714814B2 - Wesco pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wesco pump that forms an impeller by forming a radial groove on the outer diameter side of a disk.

[Prior Art] Wesco pumps are shown in FIGS. 3 (a) and 3 (b) and FIG.
As shown in FIGS. 1 (a) and 1 (b), a radial groove 2 is formed on the outer diameter side of the disk 1 to form an impeller, and the impeller is rotated inside the casing to generate a vortex. It is configured to pump water.

For this reason, the shape of the groove of the impeller has a great influence on the pumping characteristics, and studies have been made to improve the pumping characteristics.

In general, when the pumping characteristics are considered in terms of the head, the head becomes larger as the volume of the groove 2 becomes larger, and the volume of the groove 2 is set as large as possible when forming an impeller.

Since the grooves 2 are formed radially, when the outer diameter side of the disk 1 is cut once in the outer diameter direction, grooves 2a having the same width are formed in the cutting direction as shown in FIG.

In this case, the cutting of the groove 2a only needs to be performed once, and it can be said that the processing is easy.

However, since the shape of the blade 3a has a fan shape that greatly expands in the outer diameter direction, the volume of the groove 2a is reduced.

Such a shape of the blade 3a and the groove 2a is thicker on the outer diameter side of the blade 3A, so that when foreign matter such as sand is mixed, it is not easily worn, and can be said to be a mechanically strong shape. ,
Since the volume of the groove 2a is reduced, it is against the improvement of the pumping characteristic.

Therefore, as shown in FIGS. 2 (a) and 2 (b),
It is conceivable to cut the groove 2b along 3b.

In this case, if the cutting blade for cutting the groove 2b is formed of two blades and has a shape such that the blade 3b remains, the groove 2b can be formed by a single cutting along the blade 3b.

However, in this case, the thickness of the blade 3b is the same on the inner diameter side and the outer diameter side, and if foreign matter such as sand is mixed in, the mechanical strength becomes insufficient.

"Problems to be Solved by the Invention" Therefore, in the conventional Wesco pump, the shape of the groove of the impeller is changed from FIGS. 2 (a) and (b) or FIGS. ) Was selectively adopted.

The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a Wesco pump including an impeller having good pumping characteristics and high mechanical strength against foreign substances and the like.

Means for Solving the Problems The present invention relates to a wesco pump using an impeller in which a plurality of grooves are radially formed on an outer diameter portion of a substantially disc and both screens, wherein the grooves and grooves of the impeller are provided. The problem is solved by forming the shape of the partitioning blade into a fan shape that expands toward the outer diameter direction and forming the groove into a circular cross section.

[Operation] Since the blades are formed in a fan shape spreading in the outer diameter direction, the thickness on the outer diameter side increases, and the mechanical strength against foreign substances such as sand increases.

And since a groove | channel is formed in the fan shape which expands to an outer diameter direction, the volume of a groove | channel can be enlarged.

Embodiment The present invention will be described based on an embodiment shown in the drawings. FIGS. 1 (a) and 1 (b) are views of a main part of a wesco pump according to an embodiment of the present invention.

FIG. 1 (a) is a plan view of a main part, and FIG. 1 (b) is a longitudinal sectional view of the main part. In the Wesco pump, a groove 5 is evenly formed in the outer diameter side of the disc 4 in the circumferential direction. The blades 6 are provided between the adjacent grooves 5.

The grooves 5 and the blades 6 each have a shape that spreads in a fan shape in the outer diameter direction, and the blades 6 have a larger thickness on the outer diameter side, so that the mechanical strength is increased.
Can be increased without being largely occupied by the blades 6.

It is difficult to cut such a groove 5 at a time by cutting one groove 5 at a time, and it is necessary to cut the groove 5 at a fixed angle by an NC machine.

According to such an NC machine, since the cutting can be performed at an arbitrary angle, the grooves 5 and the blades 6 can be set to required shapes and cut.

The ratio of the groove 5 and the blade 6 formed in a fan shape may be arbitrary, but may be set based on the mechanical strength required for the blade 6.

Of course, a normal cutting machine can perform sufficient processing, but the number of grooves and blades increases the processing time, and it is more efficient to perform cutting using a machine configured to perform automatic cutting.

[Effects of the Invention] According to the present invention, the grooves and the blades each have a fan shape that expands in the outer diameter direction, so that the mechanical strength of the blades against foreign matter and the like can be increased, and the reliability against foreign matter and the like can be improved. And since the capacity of the groove is large, the pumping characteristics are improved, and the performance of the Wesco pump is improved, and the effect is extremely large.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are views of a main part of a wesco pump according to one embodiment of the present invention. FIGS. 2 (a) and 2 (b) and FIGS. 3 (a) and 3 (b) are views showing the main parts of a conventional Wesco pump. 4 ... disk, 5 ... groove, 6 ... blade.

Claims (1)

(57) [Claims] 1. A wesco pump using an impeller in which a plurality of grooves are radially formed on an outer diameter portion and on both side surfaces of a substantially circular plate, wherein each of the grooves of the impeller and the shape of a blade partitioning the groove has an outer diameter. A wesco pump characterized in that it is formed in a fan shape expanding in the direction, and the cross-sectional shape of the groove is formed in an arc shape.