CN201321988Y - Self-balance multistage centrifugal pump - Google Patents
Self-balance multistage centrifugal pump Download PDFInfo
- Publication number
- CN201321988Y CN201321988Y CNU2008201564177U CN200820156417U CN201321988Y CN 201321988 Y CN201321988 Y CN 201321988Y CN U2008201564177 U CNU2008201564177 U CN U2008201564177U CN 200820156417 U CN200820156417 U CN 200820156417U CN 201321988 Y CN201321988 Y CN 201321988Y
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- pump
- pressure inlet
- inlet segment
- exit end
- water exit
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Abstract
The utility model relates to a self-balance multistage centrifugal pump, which includes a middle discharge casing (12), a water conduit (6), and a high-pressure suction casing (5); the water conduit (6) is arranged above the pump and connected between the middle discharge casing (12) and the high-pressure suction casing (5); the self-balance multistage centrifugal pump further includes a mechanical seal (4), a low-pressure suction casing (18) and the high-pressure suction casing (5); and the mechanical seal (4) adopts a wear-resistant balance mechanical seal which is mounted on the low-pressure suction casing (18) and the high-pressure suction casing (5). The utility model has the benefits that the shaft seal adopts the high-pressure balance mechanical seal, no balance water pipe is required outside the sealing chamber for reducing the sealing pressure, the leakage loss of the pump is reduced, and the efficiency is improved; and the water conduit of the pump is arranged above the pump, so that the center height of the pump is greatly reduced, and the pump runs more stably and reliably.
Description
Technical field
The utility model relates to a kind of self-balanced multiple-stage centrifugal pump, relates in particular to diversion pipeline and shaft seal structure thereof in this self-balanced multiple-stage centrifugal pump.
Background technique
Self-balanced multiple-stage centrifugal pump is that a kind of Coal Chemical Industry-gasification that is used in feeds water with the scrubber tower circulation, can be used for oil-field flooding, Crude Oil Transportation, boiler feed water and petrochemical industry simultaneously and carry high-temperature high-pressure medium, be specially adapted to contain in the fed sheet of a media liquid of fine sand solid particle.
In the prior art in multistage pump impeller be to be disposed in order in the same way, the huge axial force that produces during pump operation is carried out balance by Balance disc or balancing drum, and the solid particle in the medium can aggravate the wearing and tearing of Balance disc or balancing drum, and balance was lost efficacy; Simultaneously when the pump working conditions change, the axial force variation makes pump rotor parts play and Balance disc and the moment friction of balance seat takes place, can kill off-axis because of balanced controls when serious, thereby for containing the situation that solid particle and pump operating mode often change in the fed sheet of a media, this common multistage pump just exists poor reliability, short weakness of life-span.
In order to overcome above shortcoming, developed impeller symmetric arrangement self-balanced multiple-stage pump now again, the axial force self-balancing that impeller produces in the pump running need not be provided with axial force balance mechanism, but need the diversion pipeline that the liquid that the upper level impeller is come out is directed to the next stage impeller inlet.Sectional type mono-hull multistage pump, axial subdivision multistage pump and bivalve body multistage pump are arranged again in the self-balanced multiple-stage pump, and the layout of diversion pipeline, a kind of external being arranged under the pump, so just raised the center height of pump, can strengthen the vibration and the noise of pump, be unfavorable for the stable operation of pump, also increased the cost of pump simultaneously; Another kind is to place in the pump, and this structure is very complicated, and casting manufacturability is poor, has increased difficulty for production and quality control, and when this class pump will increase and decrease impeller change pump performance simultaneously, analogue formation had increased cost of production in addition.
The axle envelope form of pump in the prior art, two kinds of structural types of mechanical seal and packing seal are arranged, what mechanical seal was adopted is unbalanced type machine envelope, in these two kinds of structural types, all before the sealing position, be provided with pressure-releasing cavity and release pipeline feeding low voltage terminal, reduce sealing load, the leakage loss that has so just increased, reduced pump efficiency, this structure has also increased the axial length of pump, and the jib-length of rotor part is increased, the intensity and the rigidity of axle have been reduced, owing to the impurity liquid of carrying, pipeline stops up easily, makes the seal failure of pump simultaneously.
Summary of the invention
The utility model technical issues that need to address have provided a kind of self-balanced multiple-stage centrifugal pump, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
The utility model comprises: middle water exit end, aqueduct, high pressure inlet segment; Described aqueduct is arranged in directly over the pump, is connected between middle water exit end and the high pressure inlet segment; Also comprise: mechanical seal, low pressure inlet segment, high pressure inlet segment; Described mechanical seal adopts wear-resisting balance mechanical seal to be loaded on low pressure inlet segment, the high pressure inlet segment.
Compared with prior art, the beneficial effects of the utility model are: the axle envelope adopts high pressure balance type machine envelope, and closed chamber does not need to connect balancing pipeline in addition outward and reduces sealing load, has reduced the leakage loss of pump, has improved efficient; The pump aqueduct is arranged in directly over the pump, can reduce the pump center height greatly, makes pump operation more reliable and more stable.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
As seen from Figure 1: the utility model comprises: middle water exit end 12, aqueduct 6, high pressure inlet segment 5; Described aqueduct 6 is arranged in directly over the pump, is connected between middle water exit end 12 and the high pressure inlet segment 5; Also comprise: mechanical seal 4, low pressure inlet segment 18, high pressure inlet segment 5; Described mechanical seal 4 adopts wear-resisting balance mechanical seal to be loaded on low pressure inlet segment 18, the high pressure inlet segment 5;
Described high pressure inlet segment 5 and low pressure inlet segment 18 are arranged in the pump two ends, middle water exit end 12 and water exit end 11 are arranged in the pump neutral position, spiral seal cover 13 is equipped with in portion within it, adorn dextrorotation impeller 16 and left-handed impeller 10 that quantity equates respectively on middle water exit end 12 and water exit end 11 both sides, and symmetric arrangement back-to-back; Left-handed stator 9 and stage casing 8 are equipped with outside the left-handed impeller 10 in dextrorotation impeller 16 outer dextrorotation stator 15 and the stage casings 8 of being equipped with, and pull bar 17 is linked and packed low pressure inlet segment 18, middle water exit end 12, water exit end 11, high pressure inlet segment 5 and stage casing 8 in one; Spiral seal cover 7 is housed before described mechanical seal 4.
The utility model is a horizontal multi-stage centrifugal pump, be the sectional type structure, the pump neutral position is middle water exit end 12 and water exit end 11, impeller 10,16 and stator 9,15 have dextrorotation and left-handed branch, their quantity equates, water exit end 12 and water exit end 11 both sides and symmetric arrangement back-to-back in the middle of laying respectively at, impeller 10,16 are contained on the axle 3, and axle sleeve 20 arranged, key 14, round nut 22 grades are fixed, impeller 10,16 outsides are stators 9,15, at stator 9,15 outsides are stage casings 8, inlet segment 18 and high pressure inlet segment 5 are positioned at the two ends impeller foremost, middle water exit end 12 is connected with high pressure inlet segment 5 by the aqueduct 6 that is arranged in directly over the pump, inlet segment 18, stage casing 8, middle water exit end 12, water exit end 11, high pressure inlet segment 5, organically cooperation and as a whole by pull bar 17 and nut combinations is the rotation of bearing support 19 and angular contact bearing 2 and roller bearing 21 support rotor parts at the two ends of pump between them; With the rotor part junction balance mechanical seal 4 being housed at inlet segment 18 and high pressure inlet segment 5, is spiral sleeve 7 before the machine envelope, enters Seal cage in order to the control solid particle.Entire pump is carried out support fixation by the base 1 of intermediate support, and pump is by diaphragm coupling 23 transmissions of lengthening.
The utility model is because the impeller symmetric arrangement, the axial force that impeller produces is cancelled each other and is reached autobalance, Balance disc or balancing drum balancing axial thrust structure have been cancelled, also the situation of balance inefficacy is taken place with regard to solid particle medium acceleration Balance disc or the balancing drum wearing and tearing of having eliminated owing to conveying, and owing to working conditions change causes the rotor part play, Balance disc and the moment friction of balance seat take place, and balanced controls are killed and the accident of off-axis.Aqueduct can effectively reduce pump center height directly over being arranged in pump, reduced the vibration of pump operation, the stability that noise improves pump operation, but the while economical with materials reduces cost.The axle envelope is owing to adopt balance mechanical seal, and use the spiral seal axle sleeve to reduce solid particle in front and enter Seal cage, cancelled the balancing pipeline of release, improved pump efficiency like this, reduce the jib-length of rotor part simultaneously, strengthened the intensity and the rigidity of axle, made pump operation more reliable and more stable.
Working principle of the present utility model: liquid is entered by the low pressure inlet segment, through after the pressurization of what dextrorotation impeller, flow out from the middle water exit end of middle position, guiding enters the high pressure inlet segment through aqueduct, again after the pressurization of what left-handed impeller from the water exit end efflux pump of middle position; Dextrorotation impeller and left-handed impeller symmetric arrangement back-to-back are loaded on the axle, in the middle of connecting the aqueduct of water exit end and high pressure inlet segment be arranged in pump directly over.At high pressure inlet segment and low pressure inlet segment and rotor part junction balance mechanical seal being housed, is spiral sleeve before the machine envelope, does not have balancing pipeline outside Seal cage.
Claims (2)
1. a self-balanced multiple-stage centrifugal pump comprises: middle water exit end (12), aqueduct (6), high pressure inlet segment (5); It is characterized in that: described aqueduct (6) is arranged in directly over the pump, is connected between middle water exit end (12) and the high pressure inlet segment (5); Also comprise: mechanical seal (4), low pressure inlet segment (18), high pressure inlet segment (5); Described mechanical seal (4) adopts wear-resisting balance mechanical seal to be loaded on low pressure inlet segment (18), the high pressure inlet segment (5).
2. self-balanced multiple-stage centrifugal pump according to claim 1 is characterized in that: described high pressure inlet segment (5) and low pressure inlet segment (18) are arranged in the pump two ends, and middle water exit end (12) and water exit end (11) are arranged in the pump neutral position; Adorn dextrorotation impeller (16) and left-handed impeller (10) that quantity equates respectively on middle water exit end (12) and water exit end (11) both sides, and symmetric arrangement back-to-back; Outer dextrorotation stator (15) and stage casing (8) of being equipped with of dextrorotation impeller (16), outer left-handed stator (9) and stage casing (8) of being equipped with of left-handed impeller (10), pull bar (17) is linked and packed low pressure inlet segment (18), middle water exit end (12), water exit end (11), high pressure inlet segment (5) and stage casing (8) in one; At the preceding spiral seal cover (7) that is equipped with of described mechanical seal (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201564177U CN201321988Y (en) | 2008-12-02 | 2008-12-02 | Self-balance multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201564177U CN201321988Y (en) | 2008-12-02 | 2008-12-02 | Self-balance multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201321988Y true CN201321988Y (en) | 2009-10-07 |
Family
ID=41159372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201564177U Expired - Fee Related CN201321988Y (en) | 2008-12-02 | 2008-12-02 | Self-balance multistage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201321988Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606525A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Balance structure of rotor for starting water feeding pump |
| CN102606522A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Rotor component of charging pump for nuclear power station |
| CN107542670A (en) * | 2017-09-27 | 2018-01-05 | 上海阿波罗机械股份有限公司 | Small pump and small pump pump group |
| CN111649003A (en) * | 2020-06-09 | 2020-09-11 | 长沙佳能通用泵业有限公司 | Self-balancing multi-stage pump composite pipe |
| 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 |
| CN114893436A (en) * | 2022-06-13 | 2022-08-12 | 江苏亚梅泵业集团有限公司 | Self-balancing multistage pump shaft seal mechanical seal structure |
-
2008
- 2008-12-02 CN CNU2008201564177U patent/CN201321988Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606525A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Balance structure of rotor for starting water feeding pump |
| CN102606522A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Rotor component of charging pump for nuclear power station |
| CN102606522B (en) * | 2012-03-27 | 2013-11-06 | 上海阿波罗机械股份有限公司 | Rotor component of charging pump for nuclear power station |
| CN107542670A (en) * | 2017-09-27 | 2018-01-05 | 上海阿波罗机械股份有限公司 | Small pump and small pump pump group |
| CN111649003A (en) * | 2020-06-09 | 2020-09-11 | 长沙佳能通用泵业有限公司 | Self-balancing multi-stage pump composite pipe |
| 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 |
| CN114893436A (en) * | 2022-06-13 | 2022-08-12 | 江苏亚梅泵业集团有限公司 | Self-balancing multistage pump shaft seal mechanical seal structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091007 Termination date: 20111202 |