CN2509356Y - Submerged pump - Google Patents

Abstract

The utility model relates to a submerged pump which includes a pump body, a blade wheel, a rotary shaft, a mechanical seal and a bearing pipe, and is characterized in that an aeration chamber is arranged between the mechanical seal of the bearing pipe and the pump body and connected with an air supply through an aerating pipe. After such improvement, the aeration chamber is provided with air with certain pressure so as to form an air cushion layer which prevents the contact between the liquid in the pump body and the mechanical seal, thus effectively prolonging the service life of the mechanical seal and the bearing and enabling the submerged pump to work in the corrosive liquid medium on which hard grains are floating. The utility model is in particular applicable in the wells or holes.

Description

Under Water Pumps

The utility model relates to the pump class, and particularly a kind of improved Under Water Pumps is fit to darker well and uses.

In the prior art, two class Under Water Pumpss are arranged: the one, cantilever type Under Water Pumps, another kind are major axis formula Under Water Pumpss.The pump shaft of cantilever type Under Water Pumps does not have bearing in stretching into the support column of liquid, the problem that does not have bearing wear or corrosion, but when cantilever was oversize, vibrations can take place and cause damage in pump, therefore general cantilever must be controlled in 1.5 meters, can not use in darker well.And the pump shaft of major axis formula Under Water Pumps has a lot of intermediate bearings, can be used for very dark well, also be immersed in the liquid but not enough is near the bearing of impeller, if what Under Water Pumps was pumped is the liquid of high temperature strong corrosion or the liquid that contains a large amount of solid particles, this bearing is corroded or wearing and tearing meeting premature failure, can not work long hours.Though the prior art pipe makes improvements it, under the lower bearing of a minimum joint support column, load onto mechanical seal, effect is also not obvious.

The purpose of this utility model is to provide a kind of improvement design of Under Water Pumps, and this Under Water Pumps can overcome the deficiency of prior art.Can be used for deep-well hole, again can be in the liquid of high temperature strong corrosion or contain the medium-term and long-term work of liquid of a large amount of SSs.

Above-mentioned task realizes by this way, this Under Water Pumps includes the pump housing, impeller, rotating shaft, bearing, mechanical seal and support column, it is characterized in that neither one plenum chamber between the support column mechanical seal and the pump housing, this plenum chamber is connected with source of the gas by gas tube.

Can know from above-mentioned improvement, owing between the pump housing and support column mechanical seal, be provided with a plenum chamber, in use, be connected with outer source of the gas by its gas tube, gas is irritated in the plenum chamber, become an air cushion, the air layer that certain pressure is promptly arranged, medium in the pump is not contacted with mechanical seal, prevent corrosion and solid particles wear problems effectively, thereby prolonged the working life of bearing and Under Water Pumps.

Below in conjunction with accompanying drawing structure of the present utility model is further described.

Fig. 1 is the sectional view of a kind of concrete structure of the utility model.

As shown in Figure 1, on the upper-end surface of the horizontal pump that constitutes by the pump housing 1 and impeller 2, be provided with an external diameter with support column identical cartridge type plenum chamber 4, its two ends closely link together by the upper-end surface of flange and bolt and water pump and the flange of support column 3, all seal with seal ring on its surface of contact.As prior art, rotating shaft 5 is supported with bearing 6 by two ends in the support column 3, and the upper-end surface of passing plenum chamber 4 is connected with the impeller 2 of water pump.Mechanical seal 7 is arranged at rotating shaft 5 between support column 3 lower bearings 6 and plenum chamber 4 upper-end surfaces with last.Gas tube 8 is along support column 3 inboard settings, and its lower end is communicated with plenum chamber 4, and its upper end is connected with source of the gas by joint.Figure 1 shows that a Under Water Pumps that the degree of depth is more shallow.If well is very dark, as long as several transmission commentaries on classics of adjunction and support column just can again in this support column 3 and rotating shaft 5.The motor that drives water pump vane 2 rotations is connected with the final section transmission shaft.

The liquid that the utility model is particularly suitable for the corrosion thing being arranged in the well or containing too much suspension grit uses.

Claims (3)

1, a kind of Under Water Pumps, include the pump housing (1), impeller (2), rotating shaft (5), bearing (6), mechanical seal (7) and support column (3) and it is characterized in that also being provided with plenum chamber (4) between support column (3) mechanical seal (7) and the pump housing (1), this plenum chamber (4) is connected with source of the gas by gas tube (8).

2, according to the improved Under Water Pumps of claim 1, it is characterized in that plenum chamber (4) is a diameter and the identical cylindrical shell of support column (3), flange by its two ends and support column (3) and the pump housing (1) link together, and its upper-end surface is connected with mechanical seal (7).

3, Under Water Pumps according to claim 1 is characterized in that gas tube (8) is arranged at the inboard of support column (3), and its lower end is communicated with plenum chamber (4), and the upper end is connected with source of the gas by joint.

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