CN2259511Y - Centrifugal pump for delivering fluid agent - Google Patents

Abstract

The utility model relates to a centrifugal pump used for delivering liquid media, which is composed of a pump housing, a pump cover, an impeller, a sealing member, a shaft, a bearing and a support frame, wherein, the pump cover is a solid sealing end cover; the impeller is arranged inversely; an inlet of the impeller faces to the bearing; a liquid feeding pipe member of a pump is arranged between the impeller and the bearing, and is fixed on the pump housing by screws; the shaft seal of the liquid-feeding pipe member of the pump is standing-type mechanical seal with outer loading and inner flow. Because the impeller is arranged inversed, the fluid media enters into the pump body from a radial water inlet on the pump body, and thus the seal is reliable with difficult leakage; when the utility model has a failure, the pump body is not needed to be dismounted; the pump cover is only needed to be opened, and thus the utility model is convenient to repair.

Description

A kind of centrifugal pump of conveyance fluid medium

The utility model relates to a kind of centrifugal pump of conveyance fluid medium, belongs to the chemical mechanical equipment technical field.

The centrifugal pump of Shi Yonging is made up of the pump housing, pump cover, impeller, Sealing, axle, bearing, Sealing in the prior art, water intake is axially to be provided with, the water that enters in the pump housing becomes press water after water outlet is discharged under impeller drives, because the pressure in the pump housing raises the sealed chamber of a part of current direction impeller opposite side, the Sealing experience wear, will leak, must change Sealing or termination of pumping inspection, repair, the operation period is short, the maintenance difficulty is big, the maintenance expenses height.

The purpose of this utility model is to overcome Seal cage internal pressure height in the prior art, and the defective that Sealing leaks easily designs a kind of simple in structure, good seal performance, the centrifugal pump of raising operation period.

The purpose of this utility model can realize by following measure:

The utility model is made up of pump case, pump cover, impeller, Sealing, axle, bearing and support, and pump cover is a solid end cover; Impeller is the installation that is inverted, and promptly the import of impeller is towards bearing; Pump feed liquor pipe fitting is located between impeller and the bearing, by screw on pump case.

The utlity model has following advantage:

1, the impeller installation that is inverted, flowing medium is entered in the pump housing by the radially water intake on the pump housing, discharges through drain opening under the effect of impeller, like this, pump housing inlet is in low-pressure state all the time, and therefore, sealing is reliable easily, be difficult for leaking, reduced the termination of pumping number of times, prolonged the repair cycle;

2, when impeller or Sealing break down, needn't disassemble the pump housing, only need open pump cover, can overhaul easily.

Accompanying drawing 1 is the utility model structural representation.

Accompanying drawing 2 is the structural representation of the utility model pump feed liquor pipe fitting shaft seal.

The utility model will be further described below in conjunction with accompanying drawing:

The utility model is made up of pump case (5), pump cover (1), impeller (2), Sealing (7), axle, bearing (8) and support, pump cover (1) is a solid end cap, be installed on the pump case (5) by bolt, on pump cover (1), be provided with the circular groove (3) of installation " O " shape seal ring; Impeller (2) is the installation that is inverted, and promptly the import of impeller (2) is towards bearing (8); Pump feed liquor pipe fitting (9) is located between impeller (2) and the bearing (8), by screw on pump case (5).The shaft sealing of pump feed liquor pipe fitting (9) is stream static mechanical seal in the outer dress, and it is made up of rotating ring, stationary ring, spring and gland, and rotating ring (10) is fixed on the axle (13) by screw thread; On pump feed liquor pipe fitting (9), gland (14) is provided with spring (15) to gland (14) by screw, and spring (15) is pressed on the stationary ring (12), and rotating ring (10) and stationary ring (12) sealing surface are contacted.Flowing medium is entered in the pump case (5) by the radially water intake (6) on the pump feed liquor pipe fitting (9), under the effect of impeller (2), discharge through drain opening (4), like this, pump inlet place is in low-pressure state all the time, therefore, Sealing (7) also is difficult for leaking, thereby, reduce the termination of pumping number of times, prolonged the repair cycle; When impeller (2) or Sealing (7) when breaking down, needn't disassemble the pump housing, only need open pump cover (1), can overhaul easily.

Claims (2)

1, a kind of centrifugal pump of conveyance fluid medium is made up of pump case, pump cover, impeller, Sealing, axle, bearing and support, it is characterized in that pump cover (1) is a solid end cover; Impeller (2) is the installation that is inverted, i.e. the import of impeller is towards bearing (8); Pump feed liquor pipe fitting (9) is located between impeller (2) and the bearing (8), by screw on pump case (5).

2, centrifugal pump according to claim 1, the shaft sealing of pump feed liquor pipe fitting are stream static mechanical seal in the outer dress, and it is made up of rotating ring, stationary ring, spring and gland, it is characterized in that rotating ring (10) is fixed on the axle (13) by screw thread; On pump feed liquor pipe fitting (9), gland (14) is provided with spring (15) to gland (14) by screw, and spring (15) is pressed on the stationary ring (12), and rotating ring (10) and stationary ring (12) sealing surface are contacted.

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