CN203926141U - The self-balance type multistage centrifugal pump of a kind of end water sucting belt inducer - Google Patents

The self-balance type multistage centrifugal pump of a kind of end water sucting belt inducer Download PDF

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Publication number
CN203926141U
CN203926141U CN201420279008.1U CN201420279008U CN203926141U CN 203926141 U CN203926141 U CN 203926141U CN 201420279008 U CN201420279008 U CN 201420279008U CN 203926141 U CN203926141 U CN 203926141U
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China
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inducer
inlet segment
centrifugal pump
self
multistage centrifugal
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CN201420279008.1U
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Chinese (zh)
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陈芳芳
秦武
罗瑞祥
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CHANGSHA JIANENG GENERAL PUMP Co Ltd
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CHANGSHA JIANENG GENERAL PUMP Co Ltd
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Abstract

The utility model relates to a kind of self-balance type multistage centrifugal pump, refers in particular to the self-balance type multistage centrifugal pump of a kind of end water sucting belt inducer.The utility model comprises static part and rotor part, and static part comprises inlet segment, stage casing, water exit end and secondary inlet segment, is provided with stators at different levels in stage casing, and the end of secondary inlet segment is provided with bearing support; Rotor part comprises pump shaft, is arranged on inducer and impeller on pump shaft, and inducer is arranged on the front end of first order impeller and is positioned at inlet segment.The utility model installs an inducer additional at the first order impeller front end of pump, remarkable to improving centrifugal pump anti-cavitation performance effect, and simple in structure, fabricating cost is low, highly versatile, be convenient to install manufacture, operation debugging and easy to maintenance; By changing inlet segment suction port direction, remove the devices such as existing multistage centrifugal pump inlet segment bearing support, seal arrangement from, avoid inlet segment leakage, prevent that air from entering the pump housing, improve operational reliability, increase the service life.

Description

The self-balance type multistage centrifugal pump of a kind of end water sucting belt inducer
Technical field
The utility model relates to a kind of self-balance type multistage centrifugal pump, refers in particular to the self-balance type multistage centrifugal pump of a kind of end water sucting belt inducer.
Background technique
Existing multistage centrifugal pump inlet segment entrance is perpendicular to pump shaft direction and becomes level or vertically upward, in inlet segment end, sealing configuration is set, and prevents that air from entering leak of liquid in the pump housing and pump, but can not ensure to seal completely.Also need to arrange supporting part in inlet segment end and need be connected with motor, therefore structure is very complicated, and fluid has increased flow losses through repeatedly turning after entering inlet segment.
Along with the expansion of pump application scale, water pump is to large flow, the development of high-lift parametric direction, existing multistage centrifugal pump can not meet cavitation performance requirement, make pump efficiency decline, the lift of cavitation reduce, cause water pump vibration and noise, make impeller be destroyed simultaneously, have a strong impact on water pump and normally move.Mainly improve cavitation performance by first-stage double suction impeller at present, but double-entry impeller and supporting pump housing component structural complexity improve effect limited, and chopped-off head lift can corresponding reductions.
Summary of the invention
The purpose of this utility model is improved according to the shortcoming existing in background technique and problem, provide a kind of simple and compact for structure, reliability is strong, installation and maintenance are convenient and the self-balance type multistage centrifugal pump of the end water sucting belt inducer that water absorbing properties and cavitation performance are greatly improved.
The technical solution of the utility model is the self-balance type multistage centrifugal pump of a kind of end of structure water sucting belt inducer, comprise static part and rotor part, it is characterized in that: described static part comprises inlet segment, stage casing, water exit end and secondary inlet segment, in stage casing, be provided with stators at different levels, the end of secondary inlet segment is provided with bearing support;
Described rotor part comprises pump shaft, is arranged on inducer and impeller on pump shaft, and described inducer is arranged on the front end of first order impeller and is positioned at inlet segment, makes directly axially water suction of inlet segment, and impeller is positioned at middle section.
The utlity model has following advantage:
1, install an inducer additional at the first order impeller front end of pump, be similar to and increase by an axial-flow blower, when work, rotate with pump shaft, inducer is to the liquid acting herein of flowing through, make to enter first order impeller after its supercharging, reduce necessary NPSH, improved the anti-cavitation performance of pump, reduced the rate of breakdown that water pump causes because of cavitation; By the pre-whirlpool that liquid is produced, reduce the obstruction of fluid simultaneously, improve the efficiency of pump;
Although 2, add the load that has increased motor after inducer, but general power of motor is 1.2 ~ 1.3 times of air horsepower of centrifugal pump, inducer size is subject to inlet segment inlet diameter to affect increase scope in certain limit, and ordinary circumstance motor still can satisfy the demands, without changing motor;
3, install inducer additional remarkable to improving centrifugal pump anti-cavitation performance effect, and simple in structure, fabricating cost is low, highly versatile, be convenient to install manufacture, operation debugging and easy to maintenance;
4, by changing inlet segment suction port direction, removed the devices such as existing multistage centrifugal pump inlet segment bearing support, seal arrangement, end cap from, avoided inlet segment leakage, prevented that air from entering the pump housing, improved operational reliability, increased the service life;
5, the utility model inlet segment is simple in structure, and liquid directly enters inducer after entering inlet segment, turns without crossing repeatedly, and pressure changes little, has reduced flow losses, can improve pump hydraulic efficiency;
6, than existing self-balance horizontal multistage centrifugal pump, this uses the length that has reduced pump shaft after novel minimizing component, has improved the rigidity of pump shaft, makes pump structure compactness, has reduced fabricating cost.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, the utility model mainly comprises pump shaft, inlet segment, impeller, inducer, stator, stage casing, secondary inlet segment, water exit end, transition tube and each choma, cover class, connecting bolt nut, pump shaft is connected by flat key with inducer, impeller, and inducer is positioned at before first order impeller.Inlet segment Way in is along pump shaft direction, and inlet segment, stage casing, secondary inlet segment and water exit end are locked each parts by pull bar.The drive end of pump shaft is arranged near water exit end one end and is connected with motor by coupling.
The self-balance type multistage centrifugal pump of end water sucting belt inducer is mainly made up of static part and rotor part.Main static part comprises inlet segment, stator, stage casing, transition tube, secondary inlet segment, bearing body part.Stators at different levels are fixed in stage casing; Inlet segment, stage casing, secondary inlet segment are locked by pull bar; Rotor part comprises pump shaft, impeller, inducer, and impeller is connected with pump shaft by flat key with inducer.Be arranged symmetrically with the axial force of autobalance pump by impeller, inducer is contained in first order impeller front end, to increase impeller inlet fluid pressure, improves the anti-cavitation performance of pump.Impeller and stator and stage casing position easy to wear arranges choma and guide blade sleeve, is convenient to maintenance and changes.Inlet segment water intake is along pump shaft direction, and pump shaft sets into submerged bearing near inlet segment one end and plays a supportive role, and is provided with " C " type bearing support in inlet segment inside, and bearing support is used into the link of boards that " Y " distributes with inlet segment, and this outer bearing carrier can also play guide functions.
The utility model multistage centrifugal pump impeller is single suction impeller, and is applicable to odd level and even level simultaneously.
The utility model inlet segment is by conveying liquid body medium condition introducing impeller as requested, and before first order impeller eye, being provided with inducer increases centrifugal pump first order impeller eye static pressure, thereby reduces the quiet positive suction pressure of centrifugal pump; Be arranged on the bearing in inducer front for fixing and minimizing load friction factor, when each component produce relative movement on pump shaft, the friction and the retainer shaft central position that reduce in power transmission process are fixed.Impeller makes liquid medium be subject to centrifugal action by rotation, thereby the Conversion of Energy that axle is passed over is medium mechanical energy.Stator is the fixing diversion component that has both suction chamber and pumping chamber double action, and the liquid medium of impeller outlet is introduced to next stage impeller.
Embodiment described in the utility model is only the description that preferred implementation of the present utility model is carried out; not the utility model design and scope are limited; do not departing under the prerequisite of the utility model design philosophy; various modification and improvement that in related domain, engineers and technicians make the technical solution of the utility model; all should fall into protection domain of the present utility model; the technology contents of the utility model request protection, has all been documented in claims.

Claims (8)

1. a self-balance type multistage centrifugal pump for end water sucting belt inducer, comprises static part and rotor part, it is characterized in that:
Described static part comprises inlet segment (1), stage casing (5), water exit end (8) and secondary inlet segment (10), is provided with stators at different levels (6) in stage casing (5), and the end of secondary inlet segment (10) is provided with bearing support (11);
Described rotor part comprises pump shaft (7), is arranged on inducer (3) and impeller (4) on pump shaft (7), described inducer (3) is arranged on the front end of first order impeller (4) and is positioned at inlet segment (1), make directly axially water suction of inlet segment (1), impeller (4) is positioned at stage casing (5) and locates.
2. the self-balance type multistage centrifugal pump of end according to claim 1 water sucting belt inducer, is characterized in that: described inlet segment (1), stage casing (5) and secondary inlet segment (10) are locked by pull bar.
3. the self-balance type multistage centrifugal pump of end according to claim 1 water sucting belt inducer, is characterized in that: described inducer (3) and impeller (4) are connected and fixed by flat key and pump shaft (7).
4. the self-balance type multistage centrifugal pump of end according to claim 1 water sucting belt inducer, is characterized in that: described stator (6), impeller (4) and cooperation place, stage casing (5) are respectively arranged with guide blade sleeve and choma.
5. the self-balance type multistage centrifugal pump of end according to claim 1 water sucting belt inducer, it is characterized in that: described inlet segment (1) inside is provided with C type bearing support (13) and opening towards pump shaft (7) end, this bearing support adopts Y type gusset (14) to be connected with inlet segment (1).
6. the self-balance type multistage centrifugal pump of end according to claim 1 water sucting belt inducer, is characterized in that: described pump shaft (7) is provided with into submerged bearing (2) near inlet segment (1) one end.
7. the self-balance type multistage centrifugal pump of end according to claim 1 water sucting belt inducer, is characterized in that: described impeller (4) is single suction impeller.
8. the self-balance type multistage centrifugal pump of end according to claim 1 water sucting belt inducer, is characterized in that: described pump shaft (7) is connected with coupling (12) in the end near bearing support (11) one sides.
CN201420279008.1U 2014-05-29 2014-05-29 The self-balance type multistage centrifugal pump of a kind of end water sucting belt inducer Active CN203926141U (en)

Priority Applications (1)

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CN201420279008.1U CN203926141U (en) 2014-05-29 2014-05-29 The self-balance type multistage centrifugal pump of a kind of end water sucting belt inducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420279008.1U CN203926141U (en) 2014-05-29 2014-05-29 The self-balance type multistage centrifugal pump of a kind of end water sucting belt inducer

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CN203926141U true CN203926141U (en) 2014-11-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104776031A (en) * 2015-02-12 2015-07-15 溧阳市超强链条制造有限公司 Multiple-stage centrifugal pump provided with induction wheel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104776031A (en) * 2015-02-12 2015-07-15 溧阳市超强链条制造有限公司 Multiple-stage centrifugal pump provided with induction wheel

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