CN201288673Y

CN201288673Y - Inclination type intermediate section multi-stage centrifugal pump

Info

Publication number: CN201288673Y
Application number: CNU2008201534720U
Authority: CN
Inventors: 潘再兵; 施永涛; 刘卫锋; 叶亚丽; 孙刚; 吴洁瑜
Original assignee: KSB Shanghai Pump Co Ltd
Current assignee: KSB Shanghai Pump Co Ltd
Priority date: 2008-09-25
Filing date: 2008-09-25
Publication date: 2009-08-12
Anticipated expiration: 2018-09-25

Abstract

The utility model discloses an inclined middle section multi-stage centrifugal pump, comprising a pump body, a bearing seat, an orifice sleeve, a water inlet section, a water outlet section, a shaft, an impeller, a middle section, a seal ring on the middle section and other components. The utility model is characterized in that the middle section is designed into inclined type, the inclined amount is determined according to the pumps having different types and different stages, ranging from 0.05mm to 0.5mm, such that the middle section is naturally in inclined state when installed, when the shaft generates deflection, the inclined direction of the impeller is the same with that of the middle section, therefore the seal ring on the middle section does not collide with the impeller. Since the inclined middle section is used, the scuffing of the impeller and the seal ring occurred in the prior art is avoided, and the safe running of the multi-stage centrifugal pump is ensured.

Description

Tilting stage casing multistage centrifugal pump

Technical field

The utility model relates to centrifugal pump, particularly tilting stage casing multistage centrifugal pump.

Background technique

Centrifugal pump is a product familiar during people live, and is widely used in industrial and agricultural production and the life.Centrifugal pump can be divided into single stage centrifugal pump and multistage centrifugal pump again, and multistage centrifugal pump is widely used in places such as mine, oil field, power plant and tall building because realizing high-lift long distance water, so the application area of multistage centrifugal pump is wider.Along with the enterprise development demand, the 26S Proteasome Structure and Function of multistage centrifugal pump is also improving constantly and is improving, we find one piece of relevant patent to multistage centrifugal pump stage casing architecture advances in patent retrieval, a kind of dicyclic stage casing multistage centrifugal pump designed as the patent No. 200720083124.6, it is by inlet tube and outer pipe are integrated design on same axis, when need keeping in repair, can directly dismantle and assemble by pump, for realizing that this purpose is designed to dicyclic with the stage casing, balancing pipeline places within the outer shroud, outer shroud is connected by the muscle sheet with interior ring, and described patent about centrifugal pump is that the centering segment structure improves to reach purpose and the utility model structure easy to maintenance, function is all different.

Yet people are in the process of using multistage centrifugal pump, find that gradually also there is certain defective in the multistage centrifugal pump structure, for example multistage centrifugal pump in the running, because the effect of the rotor self gravitation on the centrifugal pump, axle can produce certain amount of deflection, impeller also can tilt thereupon, the place that amount of deflection is big more, and the inclination of impeller is big more.But the stage casing of multistage centrifugal pump does not tilt, and will cause impeller and seal ring to bite like this, and rotor is stuck, and causes the multistage centrifugal pump cisco unity malfunction.Described defective is more common, at present in retrieval, does not find the case that solves at described problem as yet, and is still blank on this problem.

The model utility content

Technical problem to be solved in the utility model is, a kind of tilting stage casing multistage centrifugal pump is provided, and makes that impeller and seal ring on the multistage centrifugal pump is independent of each other, rotor normally moves.

In order to address the above problem the technical solution of the utility model is such:

Tilting stage casing multistage centrifugal pump by the impeller on the pump housing, bearing support, orifice sleeve, inlet segment, water exit end, axle, the axle, be enclosed within the stage casing on the axle, the parts such as seal ring that are fixed on the stage casing are formed.Be characterized in: described stage casing is a tilting, promptly to the processing of the enterprising line tilt angle of the surface of contact between stage casing and the stage casing, every multistage centrifugal pump is chosen two stage casings and is carried out such processing, and inclination amount determines according to the pump of the different progression of different model, and little 0.05mm does not wait to 0.5mm greatly.Two stage casings like this are in heeling condition when mounted naturally, when described axle produces under the situation of amount of deflection during in long-term operation, the true dip direction of impeller is identical with the stage casing, and the seal ring that therefore is fixed on the stage casing just can not collided with impeller, and rotor stuck situation can not occur yet.

Described inlet segment is arranged on the upper right side of described axle, is water intake; Described water exit end is arranged on the upper left side of described axle, is water outlet; Described axle is provided with a plurality of impellers, because the effect of rotor self gravitation, axle can produce certain amount of deflection, and described impeller also can tilt thereupon.So adopt the multistage centrifugal pump in described tilting stage casing, its stage casing is designed to tilting, and true dip direction is identical with described impeller, and the seal ring that therefore is fixed on the stage casing just can not collided with the impeller on the axle.

The beneficial effects of the utility model are, and are simple in structure, and it is convenient to transform, and avoid the situation of knowing clearly and killing between impeller and the seal ring effectively, guaranteed the safe operation of multistage centrifugal pump.

Description of drawings

Describe the utility model in detail below in conjunction with the drawings and specific embodiments;

Fig. 1 is the utility model tilting stage casing multistage centrifugal pump structure sectional view;

Fig. 2 is the structural representation in the tilting stage casing in the utility model.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

As shown in Figure 1, tilting stage casing multistage centrifugal pump is made up of parts such as the pump housing 1, bearing support 2, inlet segment 3, water exit end 4, orifice sleeve 5, axle 6, impeller 7, stage casing 8, seal rings 9.

Inlet segment 3 is arranged on the upper right side of axle 6, is water intake; Water exit end 4 is arranged on the upper left side of axle 6, is water outlet; Bearing support 2 is installed in the left side of the described pump housing 1; Orifice sleeve 5 is enclosed within on the described axle 6; Described axle 6 is provided with a plurality of impellers 7, and axle 6 can produce certain amount of deflection under the effect of rotor deadweight, and impeller 7 also can tilt thereupon, the place that amount of deflection is big more, and the inclination of impeller 7 is big more; Stage casing 8 is around being enclosed within on the axle 6, described stage casing 8 is designed to tilting, the seal ring 9 that is fixed on the stage casing 8 also has certain inclination, so that match with the inclination of described impeller 7, be that seal ring 9 on the stage casing 8 just can not collided with described impeller 7, avoid impeller 7 and seal ring 9 to bite the situation that causes rotor stuck, guaranteed the safe operation of multistage pump.

Fig. 2 is the structural representation in the tilting stage casing 8 in the utility model, by analysis and calculate, in described tilting stage casing 8, choose stage casing a and the stage casing b processing of tilting, promptly respectively the end face of stage casing a and stage casing b is carried out the processing at angle of inclination, inclination amount can be determined according to the pump of the different progression of different model, as shown in Figure 2, inclination amount Xa, Xb do not wait to 0.5mm greatly for a short time to 0.05mm.Like this two stage casing a and b are in heeling condition when mounted naturally, and when axle 6 produced amounts of deflection, the true dip direction of impeller 7 was identical with the true dip direction in stage casing 8, and the seal ring 9 that therefore is fixed on the stage casing 8 just can not collided with impeller 7.

More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1, tilting stage casing multistage centrifugal pump, comprise impeller on the pump housing, bearing support, orifice sleeve, inlet segment, water exit end, axle, the axle, be enclosed within stage casing on the axle, be fixed on the seal ring on the stage casing, it is characterized in that, described stage casing is the tilting stage casing, and the true dip direction in described tilting stage casing is identical with the true dip direction of described impeller.

2, tilting according to claim 1 stage casing multistage centrifugal pump is characterized in that, the inclination amount in described tilting stage casing little to 0.05mm greatly to 0.5mm.