CN203906303U - Multi-stage, vertical, efficient and anti-cavitation cryogenic pump - Google Patents

Multi-stage, vertical, efficient and anti-cavitation cryogenic pump Download PDF

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Publication number
CN203906303U
CN203906303U CN201420342677.9U CN201420342677U CN203906303U CN 203906303 U CN203906303 U CN 203906303U CN 201420342677 U CN201420342677 U CN 201420342677U CN 203906303 U CN203906303 U CN 203906303U
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CN
China
Prior art keywords
assembly
liquid medium
cylinder
impeller
pump
Prior art date
Application number
CN201420342677.9U
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Chinese (zh)
Inventor
李雪冰
崔治宇
刘启龙
于彦
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大连利欧华能泵业有限公司
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Priority to CN201420342677.9U priority Critical patent/CN203906303U/en
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Publication of CN203906303U publication Critical patent/CN203906303U/en

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Abstract

The utility model discloses a multi-stage, vertical, efficient and anti-cavitation cryogenic pump which comprises a cylinder component and a motor support assembled at the top of the cylinder component, wherein multiple stages of guide assemblies and impellers are arranged in the cylinder component; each guide assembly comprises a guide vane and a middle section assembly; an inlet section assembly is arranged in the cylinder component and located at upper ends of the multiple stages of guide assemblies; a liquid medium inlet cavity communicated with a liquid medium inlet pipe and an inlet cavity communicated with a first-stage impeller work cavity are formed in the inlet section assembly, and the liquid medium inlet cavity is communicated with the inlet cavity; and a spiral groove communicating the liquid medium inlet cavity and the inlet cavity is processed in the inner wall of the inlet cavity of the inlet section assembly. With the adoption of the technical scheme, the anti-cavitation capacity of the pump is improved by means of the design of spiral groove, and the guide vanes and the middle section assemblies adopt the split assembly structure, so that the guide vane flow channels are open, casting is convenient, polishing is easy, blocking caused by the casting defect is avoided, and the pump efficiency is improved.

Description

A kind of efficient, anti-cavitation vertical multilevel low-temperature pump
Technical field
The utility model relates to a kind of centrifugal pump, especially a kind of efficient, anti-cavitation vertical multilevel low-temperature pump that is applicable to carry in air separation facility technological process liquid oxygen, liquid nitrogen.
Background technique
Air separation facility technological process is to carrying the pumping unit of liquid oxygen, liquid nitrogen to require it to have that anti-cavitation performance is good, efficiency is high, maintaining requirement easily.For better meeting client's requirement, in the time of design, improve as much as possible the anti-cavitation performance of pump, to avoid, in the situation that device net positive suction head is lower, can not starts normally, turning round, elevator pump efficiency is considered in design simultaneously.
Summary of the invention
The utility model, for above-mentioned technical problem, proposes a kind of efficient, anti-cavitation vertical multilevel low-temperature pump.
For reaching above object, be achieved through the following technical solutions:
A kind of efficient, anti-cavitation vertical multilevel low-temperature pump, comprising: cylinder part and the electric machine support that is assemblied in cylinder part top; Cylinder part upper end is provided with liquid medium and enters pipe, and bottom is provided with liquid medium discharge tube; Cylinder part inner rotation is equipped with pump shaft, and pump shaft top is stretched in electric machine support, and pump shaft top is connected with the motor output shaft being fixed on electric machine support by coupling; Pump shaft stretches out in cylinder part position and seals by rotary seal parts;
Cylinder part inside is provided with multilevel deflector assembly and impeller; Multilevel deflector assembly is made up of stator and stage casing assembly, and the water conservancy diversion runner of multilevel deflector assembly and impeller active chamber are formed by stator and stage casing assembled;
Multi-stage impeller is installed on pump shaft successively, and each impeller is positioned at the impeller active chamber that stator and stage casing assembly surround jointly;
Cylinder part inside is positioned at multilevel deflector assembly upper end and is provided with entrance assembly; Entrance component internal is provided with liquid medium and enters the entrance cavity that the liquid medium that is communicated with of pipe enters chamber and is communicated with first order impeller active chamber, and liquid medium enters chamber and is communicated with entrance cavity;
Pump shaft is positioned at entrance cavity part and is equipped with inducer;
Entrance assembly entrance cavity inwall is processed with connection liquid medium and enters chamber and entrance cavity spiral chute;
As preferred structure, stator and stage casing assembly and the axially extended contacting point of impeller are provided with seal ring.
As preferred structure, liquid medium enters chamber and liquid medium enters pipe connecting end to dwindling gradually with entrance cavity connecting end chamber size, realizes preliminary medium pressure liquid and strengthens.
As preferred structure, each stator is axially fixing closing by bolt and stage casing assembly, and making water conservancy diversion runner by split-type design is open type, and each assembly be convenient to casting, polishing, avoided due to casting defect cause stop up, the assembling yield rate of elevator pump.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of specification, and for above and other object of the present utility model, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Brief description of the drawings
The utility model is totally 3 width accompanying drawings, wherein:
Fig. 1 is overall cross-sectional view of the present utility model.
Fig. 2 is entrance cavity of the present utility model place cross-sectional view.
Fig. 3 is stator of the present utility model and stage casing assembled structural representation.
In figure: 1, liquid medium enters pipe, 2, electric machine support, 3, coupling, 4, rotary seal parts, 5, entrance assembly, 6, inducer, 7, cylinder part, 8, guiding subassembly, 9, impeller, 10, pump shaft, 11, seal ring, 12, stator, 13, stage casing assembly, 14, liquid medium discharge tube, 15, spiral chute, 16, bolt, A, liquid medium enter chamber, B, entrance cavity, a, water conservancy diversion runner, b, impeller active chamber.
Embodiment
One is as shown in Figure 1 efficient, anti-cavitation vertical multilevel low-temperature pump, comprising: cylinder part 7 and be assemblied in the electric machine support 2 at cylinder part 7 tops; Cylinder part 7 upper ends are provided with liquid medium and enter pipe 1, and bottom is provided with liquid medium discharge tube 14; Cylinder part 7 inner rotation are equipped with pump shaft 10, and pump shaft 10 tops are stretched in electric machine support 2, and pump shaft 10 tops are connected with the motor output shaft being fixed on electric machine support 2 by coupling 3; Pump shaft 10 stretches out in cylinder part 7 positions and seals by rotary seal parts 4;
Cylinder part 7 inside are provided with multilevel deflector assembly 8 and impeller 9; Multilevel deflector assembly 8 is made up of stator 12 and stage casing assembly 13, and the water conservancy diversion runner a of multilevel deflector assembly 8 and impeller active chamber b are assembled and formed by stator 12 and stage casing assembly 13;
Multi-stage impeller 9 is installed on pump shaft 10 successively, and each impeller 9 is positioned at the impeller active chamber b that stator 12 and stage casing assembly 13 surround jointly;
Cylinder part 7 inside are positioned at multilevel deflector assembly 8 upper ends and are provided with entrance assembly 5; Entrance assembly 5 inside are provided with liquid medium and enter pipe 1 liquid medium being communicated with entrance cavity B that enters chamber A and be communicated with first order impeller active chamber, and liquid medium enters chamber A and is communicated with entrance cavity B;
Pump shaft 10 is positioned at entrance cavity B part and is equipped with inducer 6;
As shown in Figure 2, entrance assembly 5 entrance cavity B inwalls are processed with connection liquid medium and enter chamber A and entrance cavity B spiral chute 15;
Adopt the utility model of technique scheme, the liquid medium that when inducer 6 work by arranging of spiral chute 15, the edge liquid medium of blade rotates due to centrifugal action, the flow direction that ensures this part liquid medium is the entrance towards impeller 9, and then the necessary NPSH of reduction pump, avoid the impact of this part liquid medium on pump cavitation performance.
As preferred structure, stator 12 and stage casing assembly 13 are provided with seal ring 11 with the axially extended contacting point of impeller 9, as shown in Figure 3.
As preferred structure, liquid medium enters chamber A and liquid medium enters pipe 1 connecting end to dwindling gradually with entrance cavity B connecting end chamber size, realizes preliminary medium pressure liquid and strengthens.
As preferred structure, each stator 12 is axially fixing closing by bolt 16 and stage casing assembly 13, making water conservancy diversion runner by split-type design is open type, in the time that the mobility of casting material is bad, and can be because casting defect results in blockage yet, and overcurrent part is easy to polishing, effectively improve pump efficiency, and stator 12 combine with stage casing assembly 13 after no longer dismounting, be to be processed into finished size after combination with seal ring 11 fitting surfaces, ensure machining accuracy, ensure the safe and reliable operation of pump.
To sum up, the utility model, by rational structural design, has reduced casting cost, has reduced assembling difficulty, and anti-cavitation performance is good, continuous and steady operation, long service life under efficiency high and low temperature operating mode.
The above, it is only preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, although the utility model discloses as above with preferred embodiment, but not in order to limit the utility model, any those skilled in the art are not departing within the scope of technical solutions of the utility model, appeal when utilizing the equivalent embodiment that the technology contents disclosing is made a little change or is modified to equivalent variations, in every case be the content that does not depart from technical solutions of the utility model, foundation technical spirit of the present utility model is to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.

Claims (4)

1. efficient, an anti-cavitation vertical multilevel low-temperature pump, comprising: cylinder part (7) and be assemblied in the electric machine support (2) at cylinder part (7) top;
It is characterized in that: described cylinder part (7) upper end is provided with liquid medium and enters pipe (1), and bottom is provided with liquid medium discharge tube (14); Described cylinder part (7) inner rotation is equipped with pump shaft (10), described pump shaft (10) top is stretched in electric machine support (2), and pump shaft (10) top is connected with the motor output shaft being fixed on electric machine support (2) by coupling (3); Described pump shaft (10) stretches out in cylinder part (7) position and seals by rotary seal parts (4);
Described cylinder part (7) inside is provided with multilevel deflector assembly (8) and impeller (9); Described multilevel deflector assembly (8) is made up of stator (12) and stage casing assembly (13), and the water conservancy diversion runner (a) of multilevel deflector assembly (8) is formed by stator (12) and stage casing assembled with impeller active chamber (b);
It is upper that described multi-stage impeller (9) is installed on pump shaft (10) successively, and each impeller (9) is positioned at the impeller active chamber (b) that stator (12) and stage casing assembly (13) surround jointly;
Described cylinder part (7) inside is positioned at multilevel deflector assembly (8) upper end and is provided with entrance assembly (5); Described entrance assembly (5) inside is provided with liquid medium and enters the entrance cavity (B) that liquid medium that pipe (1) is communicated with enters chamber (A) and is communicated with first order impeller active chamber, and liquid medium enters chamber (A) and is communicated with entrance cavity (B);
Described pump shaft (10) is positioned at entrance cavity (B) part and is equipped with inducer (6);
Described entrance assembly (5) entrance cavity (B) inwall is processed with connection liquid medium and enters chamber (A) and entrance cavity (B) spiral chute (15).
2. efficient, the anti-cavitation vertical multilevel low-temperature pump of one according to claim 1, is characterized in that: described stator (12) and stage casing assembly (13) and the axially extended contacting point of impeller (9) are provided with seal ring (11).
3. efficient, the anti-cavitation vertical multilevel low-temperature pump of one according to claim 1, is characterized in that: described liquid medium enters chamber (A) and enters pipe (1) connecting end to dwindling gradually with entrance cavity (B) connecting end chamber size with liquid medium.
4. efficient, the anti-cavitation vertical multilevel low-temperature pump of one according to claim 1, is characterized in that: described each stator (12) is axially fixing closing by bolt (16) and stage casing assembly (13).
CN201420342677.9U 2014-06-24 2014-06-24 Multi-stage, vertical, efficient and anti-cavitation cryogenic pump CN203906303U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420342677.9U CN203906303U (en) 2014-06-24 2014-06-24 Multi-stage, vertical, efficient and anti-cavitation cryogenic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420342677.9U CN203906303U (en) 2014-06-24 2014-06-24 Multi-stage, vertical, efficient and anti-cavitation cryogenic pump

Publications (1)

Publication Number Publication Date
CN203906303U true CN203906303U (en) 2014-10-29

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Application Number Title Priority Date Filing Date
CN201420342677.9U CN203906303U (en) 2014-06-24 2014-06-24 Multi-stage, vertical, efficient and anti-cavitation cryogenic pump

Country Status (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105545814A (en) * 2016-01-07 2016-05-04 北京航空航天大学 Spiral groove shell used for improving cavitation performance of inducer
CN104514723B (en) * 2015-01-08 2016-08-17 大连深蓝泵业有限公司 Marine vertical deep-well liquid pump
CN109812452A (en) * 2019-03-11 2019-05-28 西安航天动力研究所 A kind of high-cavitation-resistance can induce wheel
WO2020211434A1 (en) * 2019-04-17 2020-10-22 中国科学院高能物理研究所 Vertical cryogenic liquid centrifugal pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104514723B (en) * 2015-01-08 2016-08-17 大连深蓝泵业有限公司 Marine vertical deep-well liquid pump
CN105545814A (en) * 2016-01-07 2016-05-04 北京航空航天大学 Spiral groove shell used for improving cavitation performance of inducer
CN109812452A (en) * 2019-03-11 2019-05-28 西安航天动力研究所 A kind of high-cavitation-resistance can induce wheel
WO2020211434A1 (en) * 2019-04-17 2020-10-22 中国科学院高能物理研究所 Vertical cryogenic liquid centrifugal pump

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