CN205136033U - Multistage low temperature liquid oxygen pump of vertical radial subdivision - Google Patents
Multistage low temperature liquid oxygen pump of vertical radial subdivision Download PDFInfo
- Publication number
- CN205136033U CN205136033U CN201520788244.0U CN201520788244U CN205136033U CN 205136033 U CN205136033 U CN 205136033U CN 201520788244 U CN201520788244 U CN 201520788244U CN 205136033 U CN205136033 U CN 205136033U
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- CN
- China
- Prior art keywords
- pump
- blower inlet
- inlet casing
- impeller
- liquid oxygen
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Abstract
The utility model provides a multistage low temperature liquid oxygen pump of vertical radial subdivision which the constitutional features is fixed with inducer, impeller on the pump shaft of being connected with the motor, this pump is the vertical double shell that suspends in midair, and pump body changeover portion, chopped -off head blower inlet casing, blower inlet casing, final stage blower inlet casing are fixed in proper order and form the inner shell in the pump body, the impeller is arranged to final stage multi -stage impeller by the chopped -off head extremely down from last in proper order, and each blade of inducer arranges on the interior hub of inducer for the variable pitch that interior hub and excircle are the toper. Contact department of chopped -off head blower inlet casing, blower inlet casing and final stage blower inlet casing and impeller the housing seal ring is equipped with, the impeller is equipped with the impeller ring with each blower inlet casing contact department. Be equipped with nockbush, interstage axle sleeve between blower inlet casing and pump shaft, sealed adoption broach type labyrinth structure between interstage axle sleeve and blower inlet casing. This multistage low temperature liquid oxygen pump is rational in infrastructure, stabilize safety, is applicable to big or middle, small -size air separation device.
Description
One, technical field
The utility model relates to mechanical engineering pump class technical field, is the multistage low-temperature liquid oxygen pump of a kind of vertical radial subdivision specifically, is especially applicable to the vertical multi-stage centrifugal pump of transporting low temperature liquid oxygen.
Two, background technique
Liquid oxygen pump is applied to supercharging and the conveying of industry air separation facility (i.e. air-separating plant) liquid oxygen such as petrochemical industry, steel mill, Coal Chemical Industry, chemical fertilizer, industrial oxygenerating; The temperature of fed sheet of a media liquid oxygen is-183 DEG C, and medium is inflammable, explosive, ultralow temperature, outdoor installation, very easily vaporize, rigorous service condition.Therefore the pumping unit of this type of medium of conveying is required to have the advantages that sealing is reliable, cavitation resistive property is high, operation fluid loss is little and structural safety is reliable and stable.Because of liquid oxygen pump design, manufacture, operation maintenance, cold insulation, maintenance of thawing, store difficulty greatly, this product is external product in affiliated application application at present, causes occurring the problems such as valuable product, operating cost are high.The home-made equipment of liquid oxygen pump is conducive to the cost control of air separation facility link, is conducive to the lifting of domestic low-temperature liquid oxygen pump Design and manufacture level.
Three, summary of the invention
The purpose of this utility model is to provide the multistage low-temperature liquid oxygen pump of a kind of vertical radial subdivision.This pump structure is reasonable, stability and safety, is applicable to large, medium and small type air separation facility.
The technological scheme realizing the purpose of this utility model employing is: this pump is formed primarily of blower inlet casing, inducer, motor, motor rack, pump coupling, the pump housing, pump housing changeover portion, impeller, pump shaft; Motor is fixed with motor rack, and motor connects pump shaft by pump coupling, pump shaft is fixed with inducer, impeller; The pump housing, pump housing changeover portion and blower inlet casing is fixedly connected with under motor rack; This pump general structure is vertical suspention double Shell, and pump housing changeover portion, chopped-off head blower inlet casing, blower inlet casing, final stage blower inlet casing are fixed on successively in the pump housing and form inner casing; The water intake of pump is positioned at the upper end of pump, and water outlet is in the lower end of pump; Impeller is arranged to final stage multi-stage impeller order by chopped-off head from top to bottom, and each blade of inducer is that variable pitch is arranged on the interior hub of inducer, and interior hub and cylindrical are taper, are coordinated by key with axle, coordinate with pump housing transitioning end.
Described pump coupling connects with motor coupler, is provided with grease isolation ward between motor coupler and motor rack.
Gas-filled labyrinth seal and isolation ward is provided with between the described pump housing and motor rack.
Casing ring is equipped with in the contacting point of described chopped-off head blower inlet casing, blower inlet casing and final stage blower inlet casing and impeller; Impeller ring is equipped with in impeller and each blower inlet casing contacting point; Impeller ring adopts comb maze-type structure.
Nockbush, inter-stage axle sleeve is provided with between described blower inlet casing and pump shaft; Sealing between inter-stage axle sleeve and blower inlet casing adopts interdigitated electrode structure maze-type structure;
Graphite pads chip expansion appliance is lined with between described final stage blower inlet casing and the contact end face of the pump housing.
The utility model has the advantages that:
1, because each blade of inducer is that variable pitch to be arranged in inducer on hub, interior hub and cylindrical are cone structure, this structure can meet the requirement to liquid oxygen pump height cavitation performance, but the good design cavitation specific speed C value of this kind of scheme reaches 5000 ~ 30000.
2, impeller ring adopts interdigitated electrode structure labyrinth seal structure, and this structure increased flow resistance, reduces seal ring place vent flow, reduces axial force.
3, because inter-stage axle sleeve adopts interdigitated electrode structure maze-type structure, this structure effectively can reduce MODEL VERTICAL MULTISTAGE PUMP inter-stage vent flow.
Be lined with graphite pads chip expansion appliance between the contact end face 4, due to final stage blower inlet casing and the pump housing, compensator compensates to expand the deformation quantity caused due to part, and compensator application is insensitive to thermal expansion, and pump volume is little, thermal capacity is little, and cold insulation is effective.
In a word, this multistage low-temperature liquid oxygen pump structure is reasonable, stability and safety, is applicable to large, medium and small type air separation facility.
Four, accompanying drawing explanation
Fig. 1 is the utility model vertical radial subdivision multistage low-temperature liquid oxygen pump structure sectional view.
In figure: 1. water outlet, 2. final stage blower inlet casing, 3. blower inlet casing, 4. casing ring, 5. impeller ring, 6. bypass tube interface, 7. inducer, 8. gas-filled labyrinth seal, 9. grease isolation ward, 10. motor, 11. motor couplers, 12. motor racks, 13. pump coupling, 14. isolation wards, 15. pump housings, 16. water intakes, 17. pump housing changeover portions, 18. impellers, 19. chopped-off head blower inlet casing 20. nockbushes, 21. inter-stage axle sleeves, 22. expansion appliances, 23. pump shafts
Five, embodiment
In the accompanying drawings, the multistage low-temperature liquid oxygen pump of the utility model vertical radial subdivision, this pump is formed primarily of blower inlet casing, inducer, motor, motor rack, pump coupling, the pump housing, pump housing changeover portion, impeller, pump shaft; Motor 10 is fixed with motor rack 12, motor 10 connects pump shaft 23 by pump coupling 13, pump shaft 23 is fixed with inducer 7, impeller 18; Motor rack is fixedly connected with the pump housing 15, pump housing changeover portion 17 and blower inlet casing for 12 times; This pump general structure is vertical suspention double Shell, and the pump housing 15 is shell; Pump housing changeover portion 17, chopped-off head blower inlet casing 19, blower inlet casing 3, final stage blower inlet casing 2 are fixed on successively in the pump housing 15 and form inner casing; Described blower inlet casing 3 is three.The water intake 16 of pump is positioned at the upper end of pump, and water outlet 1 is in the lower end of pump; Impeller 18 is arranged to final stage four impeller orders by chopped-off head from top to bottom, and described impeller 18 is four.Each blade of inducer 7 is that variable pitch is arranged on the interior hub of inducer, and interior hub and cylindrical are taper, are coordinated by key with axle, coordinate with pump housing transitioning end.This kind of inducer structure can meet the requirement to liquid oxygen pump height cavitation performance, but the good design cavitation specific speed C value of this kind of scheme reaches 5000 ~ 30000.The back side of pump housing water intake 16 is provided with the bypass tube interface 6 for being vented.
Described pump coupling 13 connects with motor coupler 11, is provided with grease isolation ward 9 between motor coupler 11 and motor rack 12.Gas-filled labyrinth seal 8 and isolation ward 14 is provided with between the described pump housing 15 and motor rack 12.
Described chopped-off head blower inlet casing 19, blower inlet casing 3 and final stage blower inlet casing 2 is equipped with casing ring 4 with the contacting point of impeller 18; Impeller ring 5 is equipped with in impeller 18 and each blower inlet casing contacting point; Impeller ring 5 adopts comb maze-type structure.This structure increased flow resistance, reduced seal ring place vent flow, reduced axial force.
Described chopped-off head blower inlet casing 19, blower inlet casing 3 and between final stage blower inlet casing 2 and pump shaft 23, be provided with nockbush 20, inter-stage axle sleeve 21; Sealing between inter-stage axle sleeve 21 and blower inlet casing adopts interdigitated electrode structure maze-type structure; This structure effectively can reduce MODEL VERTICAL MULTISTAGE PUMP inter-stage vent flow.
Graphite pads chip expansion appliance 22 is lined with between described final stage blower inlet casing 2 and the contact end face of the pump housing 15.The application of this compensator is insensitive to thermal expansion, and pump volume is little, thermal capacity is little, and cold insulation is effective.
Claims (6)
1. the multistage low-temperature liquid oxygen pump of vertical radial subdivision, this pump is formed primarily of blower inlet casing, inducer, motor, motor rack, pump coupling, the pump housing, pump housing changeover portion, impeller, pump shaft; Motor (10) is fixed with motor rack (12), motor (10) connects pump shaft (23) by pump coupling (13), pump shaft (23) is fixed with inducer (7), impeller (18); The pump housing (15), pump housing changeover portion (17) and blower inlet casing is fixedly connected with under motor rack (12); It is characterized in that: this pump general structure is vertical suspention double Shell, and the pump housing (15) is shell; Pump housing changeover portion (17), chopped-off head blower inlet casing (19), blower inlet casing (3), final stage blower inlet casing (2) are fixed on successively in the pump housing (15) and form inner casing; The water intake (16) of pump is positioned at the upper end of pump, and water outlet (1) is in the lower end of pump; Impeller (18) is arranged to final stage four impeller orders by chopped-off head from top to bottom, inducer (7) each blade is that variable pitch is arranged on the interior hub of inducer, interior hub and cylindrical are taper, are coordinated by key with axle, coordinate with pump housing transitioning end.
2. the multistage low-temperature liquid oxygen pump of vertical radial subdivision as claimed in claim 1, it is characterized in that: described pump coupling (13) connects with motor coupler (11), is provided with grease isolation ward (9) between motor coupler (11) and motor rack (12).
3. the multistage low-temperature liquid oxygen pump of vertical radial subdivision as claimed in claim 1, is characterized in that: be provided with gas-filled labyrinth seal (8) and isolation ward (14) between the described pump housing (15) and motor rack (12).
4. the multistage low-temperature liquid oxygen pump of vertical radial subdivision as claimed in claim 1, is characterized in that: described chopped-off head blower inlet casing (19), blower inlet casing (3) and final stage blower inlet casing (2) are equipped with casing ring (4) with the contacting point of impeller (18); Impeller ring (5) is equipped with in impeller (18) and each blower inlet casing contacting point; Impeller ring (5) adopts comb maze-type structure.
5. the multistage low-temperature liquid oxygen pump of vertical radial subdivision as claimed in claim 1, is characterized in that: described chopped-off head blower inlet casing (19), blower inlet casing (3) and be provided with nockbush (20), inter-stage axle sleeve (21) between final stage blower inlet casing (2) and pump shaft (23); Sealing between inter-stage axle sleeve (21) and blower inlet casing adopts interdigitated electrode structure maze-type structure.
6. the multistage low-temperature liquid oxygen pump of vertical radial subdivision as claimed in claim 1, is characterized in that: be lined with graphite pads chip expansion appliance (22) between described final stage blower inlet casing (2) and the contact end face of the pump housing (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520788244.0U CN205136033U (en) | 2015-09-29 | 2015-09-29 | Multistage low temperature liquid oxygen pump of vertical radial subdivision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520788244.0U CN205136033U (en) | 2015-09-29 | 2015-09-29 | Multistage low temperature liquid oxygen pump of vertical radial subdivision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205136033U true CN205136033U (en) | 2016-04-06 |
Family
ID=55621832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520788244.0U Expired - Fee Related CN205136033U (en) | 2015-09-29 | 2015-09-29 | Multistage low temperature liquid oxygen pump of vertical radial subdivision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205136033U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869308A (en) * | 2018-07-27 | 2018-11-23 | 四川泰博流体科技有限公司 | A kind of labyrinth seal centrifugal pump |
| CN111661905A (en) * | 2020-07-16 | 2020-09-15 | 北京精瑞科迈净水技术有限公司 | Balanced air chamber sealing deflocculating machine |
-
2015
- 2015-09-29 CN CN201520788244.0U patent/CN205136033U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869308A (en) * | 2018-07-27 | 2018-11-23 | 四川泰博流体科技有限公司 | A kind of labyrinth seal centrifugal pump |
| CN111661905A (en) * | 2020-07-16 | 2020-09-15 | 北京精瑞科迈净水技术有限公司 | Balanced air chamber sealing deflocculating machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20190929 |