CN203348177U - Horizontal type self-balancing multiple-stage centrifugal pump with high-cavitation-resistant performance - Google Patents

Horizontal type self-balancing multiple-stage centrifugal pump with high-cavitation-resistant performance Download PDF

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Publication number
CN203348177U
CN203348177U CN 201320375080 CN201320375080U CN203348177U CN 203348177 U CN203348177 U CN 203348177U CN 201320375080 CN201320375080 CN 201320375080 CN 201320375080 U CN201320375080 U CN 201320375080U CN 203348177 U CN203348177 U CN 203348177U
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China
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stage
impeller
cavitation
inducer
centrifugal pump
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CN 201320375080
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Chinese (zh)
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李文周
王姣
李永勃
李燕
林剑锋
林朝兴
商荣强
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SHANGHAI FIRST PUMP WORKS Co Ltd
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SHANGHAI FIRST PUMP WORKS Co Ltd
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Abstract

The utility model relates to a horizontal type self-balancing multiple-stage centrifugal pump with the high-cavitation-resistant performance. The horizontal type self-balancing multiple-stage centrifugal pump comprises a stator component and a rotor component. The stator component comprises a water inlet section, a middle inducing wheel section, a flow guiding sealing ring, a middle section, a front guiding blade, a front last-stage guiding blade, a water outlet section, a back last-stage guiding blade, a back guiding blade and a secondary sucking-in section, wherein the water inlet section, the middle inducing wheel section, the flow guiding sealing ring, the middle section, the front guiding blade, the front last-stage guiding blade, the water outlet section, the back last-stage guiding blade, the back guiding blade and the secondary sucking-in section are fixed through tensioning bolt assemblies. The rotor component comprises a shaft, a shaft sleeve, an inducing wheel, a first-stage impeller, a front impeller, a middle shaft sleeve, back impellers, a bearing and a pollution stopping plate, wherein the shaft sleeve is fixed on the shaft in a locked mode through round nuts at the two ends, and the bearing is fixed through a bearing locking nut and a round nut. The first-stage impeller and the front impeller are symmetrical to the back impellers in a back-to-back mode, the inducing wheel matched with the first-stage impeller is arranged in front of the first-stage impeller, the inducing wheel and the first-stage impeller are fixed on a pump shaft and in connection transmission with the shaft through keys, and the inducing wheel, the first-stage impeller, the front impeller and the back impeller are fixed in the axial direction through the round nuts at the two ends. The flow guiding sealing ring is arranged on the outer side of the inducing wheel, and the two ends of the flow guiding sealing ring are fixed on the middle inducing wheel section and the water inlet section respectively.

Description

High-cavitation-resistance can horizontal self-balanced multiple-stage centrifugal pump
Technical field
The utility model relates to a kind of multistage centrifugal pump, and particularly a kind of a kind of high-cavitation-resistance of the medium that is applicable to conveying water, the chemical medium such as mine, chemical industry, power plant or contains a small amount of solid particle can horizontal self-balanced multiple-stage centrifugal pump.
background technique
From the prior art, the multistage pump on market mostly is chopped-off head single suction, the equidirectional arrangement of other impeller.Along with the scale of mine, power plant and chemical plant installations constantly enlarges, water pump is constantly towards large flow, high-lift future development, and from design aspect, the design discharge of multistage pump strengthens, and inhales journey and will reduce, and problem of cavitation is the inevitable problem at first solved.Sometimes medium contains a small amount of solid particle, easily balanced controls produce is destroyed, can't balancing axial thrust, and cause pump to damage, impact is normally used.
The self-balanced multiple-stage centrifugal pump that impeller is arranged symmetrically with also occurs in recent years, solved the problem of balancing axial thrust.But solving problem of cavitation still adopts first stage impeller to strengthen the method for impeller inlet area or first-stage double-absorption.In order to improve water pump suction lift, reducing cavitation occurs, adopt the first stage impeller of large import, but it is limited to put forward the high suction depth value, can not meet usage requirement, still there is cavitation phenomenons to occur, affect the working life of pump, adopt first-stage double suction impeller can carry high suction depth, but its structure is comparatively complicated, and maintenance is inconvenient.
The model utility content
The purpose of this utility model is to provide a kind of high-cavitation-resistance energy horizontal self-balanced multiple-stage centrifugal pump, it has the high-cavitation-resistance energy, lower necessary net positive suction head is arranged, can meet the requirement of the device net positive suction head that the user is lower, avoid the damage of cavitation phenomenons to pump, and improve the suction journey, and its compactness rational in infrastructure, simple, axial dimension is little, operates steadily, safe and reliable, and installation, maintenance is easy to detect quick.
For achieving the above object, the horizontal self-balanced multiple-stage centrifugal pump of a kind of high-cavitation-resistance energy of the utility model, comprise stator component and rotor part, stator component comprises the inlet segment fixing by the turnbuckle assembly, the inducer stage casing, the water conservancy diversion seal ring, stage casing, pilot blade, front final stage stator, water exit end, rear final stage stator, rear guide vane, the secondary suction casing, rotor part comprises axle, be fixed on the axle sleeve on axle by two terminal circle nut check, inducer, first stage impeller, front impeller, middle axle sleeve, rear impeller and by bearing locking nut and the fixing bearing of round nut, pollutant baffle plate, described first stage impeller and described front impeller and described rear impeller are to be arranged symmetrically with back-to-back, is furnished with the described inducer be complementary with it before described first stage impeller, described inducer and described first stage impeller are fixed on pump shaft and, by key and axle connection for transmission, axially by the two terminal circle nut, described inducer, first stage impeller, front impeller and rear impeller are fixed, described water conservancy diversion seal ring is arranged on the described inducer outside, and the two ends of described water conservancy diversion seal ring are separately fixed on described inducer stage casing and described inlet segment.
Further, described first stage impeller is the impeller of the anti-cavitation of increasing inlet-duct area.
Further, described inducer designs according to first stage impeller, and the 1.2-1.4 that its conveyance capacity is described first stage impeller doubly.
Further, the profile of described inducer is cylindrical screw shape.
Further, the structure of described inducer is uniform pitch or variable pitch formula, has two or three blades.
Further, described pollutant baffle plate is arranged on bearing part near the pump seal end, and pollutant baffle plate is arranged on axle, by locking nut, bearing, bearing interstage sleeve clamping and positioning, by key and axle connection for transmission.
Further, stator component also comprises that drive end bearing parts, non-driven-end bearing parts and stuffing box are separately fixed on inlet segment or secondary suction casing by double-screw bolt or bolt.
Adopt this structure, because its first stage impeller and front impeller and rear guide vane are the back-to-back self-balance structures be arranged symmetrically with, solve axial force balance mechanism and damaged the problem that affects the normal operation of pump, simultaneously due to the structure that adopts inducer, first stage impeller and water conservancy diversion seal ring to match, make pump there is the high-cavitation-resistance energy, lower necessary net positive suction head is arranged, can meet the requirement of the device net positive suction head that the user is lower, avoid the damage of cavitation phenomenons to pump, effectively extended the working life of pump.Some mines, chemical industry have been solved, the problem of the device pump cavitation that power plant etc. have relatively high expectations to cavitation performance.Have compactness rational in infrastructure, simple, axial dimension is little simultaneously, operate steadily, safe and reliable, and the installation, maintenance characteristics such as quick easy to detect.
The accompanying drawing explanation
The sectional view of the horizontal self-balanced multiple-stage centrifugal pump of high-cavitation-resistance energy that Fig. 1 is the utility model filler-sealing type;
The sectional view of the horizontal self-balanced multiple-stage centrifugal pump of high-cavitation-resistance energy that Fig. 2 is the utility model Mechanical Sealed Type.
Label declaration
Axle 1 bearing locking nut 2
Drive end bearing parts 3 bearings 4
Pollutant baffle plate 5 round nuts 6
Axle sleeve 7 inducers 8
Water conservancy diversion seal ring 9 inlet segments 10
Inducer stage casing 11 first stage impellers 12
Pilot blade 13 stage casings 14
The front final stage stator 16 of front impeller 15
Axle sleeve 19 in the middle of water exit end 17
The rear impeller 21 of rear final stage stator 20
Rear guide vane 22 secondary suction casings 23
Turnbuckle assembly 25 stuffing boxes 26
Axle sleeve 27 non-driven-end bearing parts 28
Round nut 29 pollutant baffle plates 30
Bearing 31 round nuts 32.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
The sectional view of the horizontal self-balanced multiple-stage centrifugal pump of high-cavitation-resistance energy that Fig. 1 is filler-sealing type of the present utility model, the high-cavitation-resistance energy horizontal multi-stage centrifugal pump in Fig. 1 comprises stator component and rotor part.Stator component is comprised of component such as inlet segment 10, inducer stage casing 11, water conservancy diversion seal ring 9, stage casing 14, pilot blade 13, front final stage stator 16, water exit end 17, rear final stage stator 20, rear guide vane 22, secondary suction casing 23, stuffing box 26, drive end bearing parts 3, non-driven-end bearing parts 28.
Inlet segment 10, inducer stage casing 11, water conservancy diversion seal ring 9, stage casing 14, pilot blade 13, front final stage stator 16, water exit end 17, rear final stage stator 20, rear guide vane 22, secondary suction casing 23 are fixed by turnbuckle assembly 25.Drive end bearing parts 3, non-driven-end bearing parts 28 and stuffing box 26 are separately fixed on inlet segment 10 or secondary suction casing 23 by double-screw bolt or bolt.
Rotor part is comprised of axle 1, bearing locking nut 2, bearing 4, pollutant baffle plate 5, round nut 6, axle sleeve 7, inducer 8, first stage impeller 12, front impeller 15, middle axle sleeve 19, rear impeller 21, axle sleeve 27, round nut 29, pollutant baffle plate 30, bearing 31 and round nut 32.
Axle sleeve 7, inducer 8, first stage impeller 12, front impeller 15, middle axle sleeve 19, rear impeller 21, axle sleeve 27 are locked on axle 1 by two terminal circle nut 6 and round nut 29.Pollutant baffle plate 5, round nut 6, pollutant baffle plate 30, bearing 31 are fixed on axle 1 by bearing locking nut 2 and round nut 32 respectively.
Because its first stage impeller and front impeller are all the self-balance structures be arranged symmetrically with back-to-back with rear guide vane, have solved axial force balance mechanism and damaged the problem that pump normally moves that affect.The first stage impeller 12 of pump is for strengthening the anti-cavitation impeller of inlet-duct area method design.Be furnished with the inducer 8 matched before first stage impeller 12, inducer 8 and first stage impeller 12 are fixed on pump shaft and, by key and axle 1 connection for transmission, axial dimension is fixing by two terminal circle nut 6 and round nut 29.Inducer designs according to the performance of first stage impeller, and the 1.2-1.4 that its conveyance capacity is first stage impeller doubly.The profile of inducer is cylindrical screw shape.The structure of inducer is uniform pitch or variable pitch formula, has two or three blades.Inducer 8 outsides are provided with the water conservancy diversion seal ring 9 with chopped-off head seal ring function, and the two ends of water conservancy diversion seal ring 9 are separately fixed on inducer stage casing 11 and inlet segment 10.Inducer 8 is used in conjunction with first stage impeller 12, and the anti-cavitation performance of inducer 8 own is better, and produces certain pressure, reduces the net positive suction head of first stage impeller 12.Thereby greatly improve the anti-cavitation performance of pump, avoided the damage of cavitation phenomenons to pump, effectively extended the working life of pump.Some mines, chemical industry have been solved, the problem of the device pump cavitation that power plant etc. have relatively high expectations to cavitation performance.
The sectional view of the horizontal self-balanced multiple-stage centrifugal pump of high-cavitation-resistance energy that Fig. 2 is Mechanical Sealed Type of the present utility model.It is that sealing means is different from the difference of Fig. 1, and corresponding axle sleeve 7 structures change to some extent, and other stators and rotor part are all identical.
Although most preferred embodiment of the present utility model has illustrated purposes, those skilled in the art can not break away from the scope of its specification and the spirit of model utility is carried out different modifications, supplements and substituted.And embodiment of the present utility model is for technological thought scope of the present utility model is described, rather than only only limit to embodiment of the present utility model.

Claims (7)

1. a high-cavitation-resistance can horizontal self-balanced multiple-stage centrifugal pump, comprise stator component and rotor part, stator component comprises the inlet segment fixing by the turnbuckle assembly, inducer stage casing, water conservancy diversion seal ring, stage casing, pilot blade, front final stage stator, water exit end, rear final stage stator, rear guide vane, secondary suction casing, and rotor part comprises axle, by two terminal circle nut check, is fixed on axle sleeve on axle, inducer, first stage impeller, front impeller, middle axle sleeve, rear impeller and by bearing locking nut and fixing bearing, the pollutant baffle plate of round nut; It is characterized in that: described first stage impeller and described front impeller and described rear impeller are to be arranged symmetrically with back-to-back, is furnished with the described inducer be complementary with it before described first stage impeller, described inducer and described first stage impeller are fixed on pump shaft and, by key and axle connection for transmission, axially by the two terminal circle nut, described inducer, first stage impeller, front impeller and rear impeller are fixed; Described water conservancy diversion seal ring is arranged on the described inducer outside, and the two ends of described water conservancy diversion seal ring are separately fixed on described inducer stage casing and described inlet segment.
2. the horizontal self-balanced multiple-stage centrifugal pump of high-cavitation-resistance energy as claimed in claim 1, is characterized in that: the impeller of the anti-cavitation that described first stage impeller is the increasing inlet-duct area.
3. high-cavitation-resistance as claimed in claim 2 can horizontal self-balanced multiple-stage centrifugal pump, and it is characterized in that: described inducer designs according to described first stage impeller, and the 1.2-1.4 that its conveyance capacity is described first stage impeller doubly.
4. high-cavitation-resistance as claimed in claim 2 can horizontal self-balanced multiple-stage centrifugal pump, and it is characterized in that: the profile of described inducer is cylindrical screw shape.
5. high-cavitation-resistance as claimed in claim 2 can horizontal self-balanced multiple-stage centrifugal pump, and it is characterized in that: the structure of described inducer is uniform pitch or variable pitch formula, has two or three blades.
6. high-cavitation-resistance as claimed in claim 1 can horizontal self-balanced multiple-stage centrifugal pump, it is characterized in that: described pollutant baffle plate is arranged on bearing part near the pump seal end, described pollutant baffle plate is arranged on described axle, by locking nut, bearing, bearing interstage sleeve clamping and positioning, by key and axle connection for transmission.
7. high-cavitation-resistance as claimed in claim 1 can horizontal self-balanced multiple-stage centrifugal pump, and it is characterized in that: stator component also comprises that drive end bearing parts, non-driven-end bearing parts and stuffing box are separately fixed on described inlet segment or described secondary suction casing by double-screw bolt or bolt.
CN 201320375080 2013-06-27 2013-06-27 Horizontal type self-balancing multiple-stage centrifugal pump with high-cavitation-resistant performance Active CN203348177U (en)

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CN 201320375080 CN203348177U (en) 2013-06-27 2013-06-27 Horizontal type self-balancing multiple-stage centrifugal pump with high-cavitation-resistant performance

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352875A (en) * 2013-06-27 2013-10-16 上海第一水泵厂有限公司 Horizontal type self-balancing multistage centrifugal pump with high cavitation resistance
CN109538537A (en) * 2018-10-30 2019-03-29 浙江水利水电学院 A kind of high speed inducer and its manufacturing method inhibiting cavitation oscillation
CN111648967A (en) * 2020-06-15 2020-09-11 长沙佳能通用泵业有限公司 Self-balancing multistage pump four-volute chamber water outlet section
CN111980930A (en) * 2020-08-10 2020-11-24 大连双龙泵业制造有限公司 Novel inducer segment guide vane type multistage centrifugal pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352875A (en) * 2013-06-27 2013-10-16 上海第一水泵厂有限公司 Horizontal type self-balancing multistage centrifugal pump with high cavitation resistance
CN109538537A (en) * 2018-10-30 2019-03-29 浙江水利水电学院 A kind of high speed inducer and its manufacturing method inhibiting cavitation oscillation
CN111648967A (en) * 2020-06-15 2020-09-11 长沙佳能通用泵业有限公司 Self-balancing multistage pump four-volute chamber water outlet section
CN111980930A (en) * 2020-08-10 2020-11-24 大连双龙泵业制造有限公司 Novel inducer segment guide vane type multistage centrifugal pump

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