CN203214404U - Single-case symmetrical radially-split multistage centrifugal pump - Google Patents
Single-case symmetrical radially-split multistage centrifugal pump Download PDFInfo
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- CN203214404U CN203214404U CN 201320214473 CN201320214473U CN203214404U CN 203214404 U CN203214404 U CN 203214404U CN 201320214473 CN201320214473 CN 201320214473 CN 201320214473 U CN201320214473 U CN 201320214473U CN 203214404 U CN203214404 U CN 203214404U
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- pump
- suction chamber
- impeller
- multistage centrifugal
- mono
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Abstract
The utility model provides a single-case symmetrical radially-split multistage centrifugal pump comprising a pump block and a pump shaft. The pump block is formed by connecting a plurality of middle segments. The pump shaft is disposed in the pump block. A bearing and a bearing bracket are disposed at each end of the pump shaft. An impeller cavity is formed in the pump block. A primary water suction chamber and a secondary water suction chamber communicated with each other are sequentially formed in the impeller cavity in an extending-in direction of the pump shaft. A group of primary impellers are disposed in the primary water suction chamber. A group of secondary impellers are disposed in the secondary water suction chamber. The primary impellers and the secondary impellers are arranged back to back. The primary water suction chamber is communicated with a suction inlet of the pump block. The secondary water suction chamber is communicated with an outlet of the pump block. The two groups of impellers are symmetrically arranged in the pump, so that axial force can be reduced effectively with no need for balance mechanisms.
Description
Technical field
The utility model belongs to the centrifugal pump field, is specifically related to radially subdivision multistage centrifugal pump of a kind of mono-hull symmetric type.
Background technique
Centrifugal pump is flowing medium (gas and liquid, also can be suspended particulate and gas or mixtures of liquids) enter from blade rotor root (import), medium relies on the high speed rotating blade to obtain centrifugal force, produces a high pressure, from the medium transport equipment of pressure relief opening (outlet) outflow.Multistage centrifugal pump is that the plural pump that will have said function gathers together, on the fluid channel structure, the medium pressure relief opening that shows the first order communicates with partial import, and partial medium pressure relief opening communicates with the import of the third level, and so the mechanism of series connection has formed multistage centrifugal pump.
Current, the multistage centrifugal pump of various applications all can produce bigger axial force in the use.Because when impeller is worked, can produce axial force at impeller, particularly the impeller number of multistage centrifugal pump is more many, and it is more serious that its axial force produces.
The model utility content
The utility model is at above-mentioned the deficiencies in the prior art, and radially subdivision multistage centrifugal pump of a kind of mono-hull symmetric type that can realize axial force self-balancing is provided.
The utility model is achieved by the following technical solution:
A kind of mono-hull symmetric type is the subdivision multistage centrifugal pump radially, comprises the pump housing that is connected and composed by a plurality of stage casings and the pump shaft that is arranged in the pump housing; The two ends of pump shaft are provided with bearing support and bearing bracket; One impeller cavity is arranged in the described pump housing;
It is characterized in that, the direction that stretches into along pump shaft in the described impeller cavity is disposed with chopped-off head suction chamber and the secondary suction chamber that is connected, be provided with one group of first stage impeller in the described chopped-off head suction chamber, be provided with one group of secondary impeller in the secondary suction chamber, first stage impeller and the back-to-back layout of secondary impeller; The chopped-off head suction chamber is communicated with the suction port of the pump housing, and secondary suction chamber is communicated with the discharge opening of the pump housing.
Further setting of the present utility model is, is Spielpassung between impeller and the pump shaft, and impeller is located step by step by snap ring.
Further setting of the present utility model is that a plurality of stage casings are strained and fixed by one group of turnbuckle that is fastened on leading portion and back segment.
Further setting of the present utility model is, a plurality of stage casings are by having the seam location and installation of transition fit, and is provided with the O RunddichtringO at the sealing surface place in each stage casing.
Further setting of the present utility model is that chopped-off head suction chamber and secondary suction chamber are communicated with by two transition runners.
Further setting of the present utility model is, is provided with Stuffing box between bearing bracket and the pump housing, and described Stuffing box and bearing bracket are for dividing body structure.
Further setting of the present utility model is, is provided with an interstage bushing on the described pump shaft between first stage impeller and secondary impeller, and the inner circumference of described interstage bushing is provided with double spiral groove.
Compared with prior art, mono-hull symmetric type described in the utility model radially the subdivision multistage centrifugal pump have following beneficial effect:
1) two groups of impellers adopt symmetric arrangement in the utility model, can effectively reduce axial force and do not need balanced controls.
2) Stuffing box follows bearing bracket to adopt the split design in the utility model, can increase the cold chuck of machine water shutoff as much as possible, and the Seal cage temperature lowers when making water-cooled, the working life of prolonged mechanical sealing, the operational reliability of raising pump.
3) design of the sealing surface place in stage casings at different levels has the O RunddichtringO as auxiliary seal in the utility model, can make pump have reliable sealing under the elevated pressures condition.
4) chopped-off head suction chamber and secondary suction chamber adopt two transition runners designs in the utility model, make more compact structure, and it is little to take up room, easy for installation.
5) interstage bushing adopts double helix design in the utility model, can reduce to leak, and improves the efficient of pump.
6) impeller of pump cooperates with pump shaft for Spielpassung in the utility model, and impeller is located step by step by snap ring, has guaranteed that impeller can play on pump shaft.
Description of drawings
Fig. 1 is the radially structural drawing of subdivision multistage centrifugal pump of mono-hull symmetric type described in the utility model.
The implication of each label is as follows among the figure:
The pump housing 1, pump shaft 2, suction port 3, bearing support 4, discharge opening 5, bearing bracket 6, mechanical seal structure 7, Stuffing box 8, first stage impeller 9, stator 10, secondary impeller 11, snap ring 12, stage casing 13, O RunddichtringO 14, turnbuckle 15, first elbow 16, connecting tube 17, second elbow 18, interstage bushing 19.
Embodiment
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
The utility model provides radially subdivision multistage centrifugal pump of a kind of mono-hull symmetric type, because this centrifugal pump is the structural type that impeller is arranged back-to-back, can realizes the self balancing of rotor axial power and does not need balanced controls.Therefore, (temperature gasification and high hot water pump in as Coal Chemical Industry) has good stable and long working life when conveying contains the medium of particle.Can be used for: the occasion that steel mill's dephosphorization, the conveying of high pressure buck, oil-field flooding and conventional BB4 type pump can be answered.The Applicable temperature scope is≤250 ℃.
Concretely, as shown in Figure 1, mono-hull symmetric type radially subdivision multistage centrifugal pump comprises the pump housing 1 that is connected and composed by a plurality of stage casings 13 and the pump shaft 2 that is arranged in the pump housing 1; The two ends of pump shaft 2 are provided with bearing support 4 and bearing bracket 6; In the described pump housing 1 impeller cavity is arranged; The direction that stretches into along pump shaft 2 in the described impeller cavity is disposed with chopped-off head suction chamber and the secondary suction chamber that is connected, be provided with one group of first stage impeller 9 in the described chopped-off head suction chamber, be provided with one group of secondary impeller 11 in the secondary suction chamber, first stage impeller 9 and secondary impeller 11 back-to-back layouts; The chopped-off head suction chamber is communicated with the suction port 3 of the pump housing 1, and secondary suction chamber is communicated with the discharge opening 5 of the pump housing 1.Be Spielpassung between impeller and the pump shaft 2, impeller is located step by step by snap ring 12.A plurality of stage casings 13 are by having the seam location and installation of transition fit, and are provided with O RunddichtringO 15 at the sealing surface place in each stage casing 13, and are strained and fixed by one group of turnbuckle 15 that is fastened on leading portion and back segment.The forging structure is adopted in stage casing 13, has good material compactness and exterior quality.
Two groups of impellers normally wait quantity to arrange to realize the self balancing of axial force.But also can make impeller quantity difference by the size that designs different balance positions, to realize the selection of odd level pump type.The fluid that first stage impeller 9 is carried carries out pressure recovery by stator 10 and water conservancy diversion arrives secondary impeller 11 entrances, at last by discharge opening 5 efflux pumps.
Chopped-off head suction chamber and secondary suction chamber are communicated with by two transition runners, make more compact structure, and it is little to take up room, easy for installation.Two transition flow passage structures are identical, all comprise first elbow 16, connecting tube 17 and second elbow 18 that are communicated with successively.Described first elbow 16 and second elbow 18 are 90 degree elbows.
Be provided with Stuffing box 8 between bearing bracket 6 and the pump housing 1, described Stuffing box 8 is the branch body structure with bearing bracket 6.Be connected by bolt between Stuffing box 8 and the bearing bracket 6, also be provided with the O RunddichtringO in its contacting point.The water-cooling jacket that can increase mechanical seal structure 7 as much as possible so is set, and the Seal cage temperature lowers when making water-cooled, the working life of prolonged mechanical sealing, the operational reliability of raising pump.
Be provided with an interstage bushing 19 on the described pump shaft 2 between first stage impeller 9 and secondary impeller 11, the inner circumference of described interstage bushing 19 is provided with double spiral groove.So arrange and to reduce to leak the efficient of raising pump.
Radially the axle envelope of subdivision multistage centrifugal pump adopts mono-hull symmetric type described in the utility model is mechanical seal.Seal style and corresponding flushing scheme are selected according to concrete medium and service condition.The mono-hull symmetric type described in the utility model radially radial bearing of subdivision multistage centrifugal pump is sliding bearing.Thrust bearing is one group of back-to-back angular contact ball bearing or a cover thrust slide bearing.Supporting and the lubricating system of bearing will be matched according to conditions such as concrete power, rotating speeds.Mono-hull symmetric type described in the utility model radially interior overcurrent zero, the component materials of subdivision multistage centrifugal pump can be selected accordingly according to concrete medium working condition, comprising the S-6 in the API610 standard, C-6 etc.
The above is preferred embodiment of the present utility model, and all equivalent variations of doing according to the utility model claim all should belong to protection domain of the present utility model.
Claims (7)
1. mono-hull symmetric type subdivision multistage centrifugal pump radially comprises the pump housing (1) that is connected and composed by a plurality of stage casings (13), and is arranged at the pump shaft (2) in the pump housing (1); The two ends of pump shaft (2) are provided with bearing support (4) and bearing bracket (6); The described pump housing has an impeller cavity in (1);
It is characterized in that, the direction that stretches into along pump shaft (2) in the described impeller cavity is disposed with chopped-off head suction chamber and the secondary suction chamber that is connected, be provided with one group of first stage impeller (9) in the described chopped-off head suction chamber, be provided with one group of secondary impeller (11) in the secondary suction chamber, first stage impeller (9) and the back-to-back layout of secondary impeller (11); The chopped-off head suction chamber is communicated with the suction port (3) of the pump housing (1), and secondary suction chamber is communicated with the discharge opening (5) of the pump housing (1).
2. mono-hull symmetric type according to claim 1 subdivision multistage centrifugal pump radially is characterized in that, is Spielpassung between impeller and the pump shaft (2), and impeller is located step by step by snap ring (12).
3. mono-hull symmetric type according to claim 1 subdivision multistage centrifugal pump radially is characterized in that a plurality of stage casings (13) are strained and fixed by one group of turnbuckle (15) that is fastened on leading portion and back segment.
4. mono-hull symmetric type according to claim 1 subdivision multistage centrifugal pump radially is characterized in that, a plurality of stage casings (13) by having the seam location and installation of transition fit, and is provided with O RunddichtringO (14) at the sealing surface place of each stage casing (13).
5. mono-hull symmetric type according to claim 1 subdivision multistage centrifugal pump radially is characterized in that, chopped-off head suction chamber and secondary suction chamber are communicated with by two transition runners.
6. mono-hull symmetric type according to claim 1 subdivision multistage centrifugal pump radially is characterized in that, is provided with Stuffing box (8) between bearing bracket (6) and the pump housing (1), and described Stuffing box (8) and bearing bracket (6) are for dividing a body structure.
7. mono-hull symmetric type according to claim 1 subdivision multistage centrifugal pump radially, it is characterized in that, described pump shaft (2) is gone up and be provided with an interstage bushing (19) between first stage impeller (9) and secondary impeller (11), and the inner circumference of described interstage bushing (19) is provided with double spiral groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320214473 CN203214404U (en) | 2013-04-24 | 2013-04-24 | Single-case symmetrical radially-split multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320214473 CN203214404U (en) | 2013-04-24 | 2013-04-24 | Single-case symmetrical radially-split multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203214404U true CN203214404U (en) | 2013-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320214473 Expired - Lifetime CN203214404U (en) | 2013-04-24 | 2013-04-24 | Single-case symmetrical radially-split multistage centrifugal pump |
Country Status (1)
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|---|---|
| CN (1) | CN203214404U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225623A (en) * | 2013-04-24 | 2013-07-31 | 嘉利特荏原泵业有限公司 | Symmetric radial-splitting multistage centrifugal pump with single casing body |
| CN105909526A (en) * | 2016-04-19 | 2016-08-31 | 湖南天奥星泵业有限公司 | Radial dissection two-end support type four-stage centrifugal pump |
| CN111810412A (en) * | 2020-08-10 | 2020-10-23 | 大连海密梯克泵业有限公司 | Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump |
-
2013
- 2013-04-24 CN CN 201320214473 patent/CN203214404U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225623A (en) * | 2013-04-24 | 2013-07-31 | 嘉利特荏原泵业有限公司 | Symmetric radial-splitting multistage centrifugal pump with single casing body |
| CN105909526A (en) * | 2016-04-19 | 2016-08-31 | 湖南天奥星泵业有限公司 | Radial dissection two-end support type four-stage centrifugal pump |
| CN111810412A (en) * | 2020-08-10 | 2020-10-23 | 大连海密梯克泵业有限公司 | Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump |
| CN111810412B (en) * | 2020-08-10 | 2024-04-16 | 大连海密梯克泵业有限公司 | Non-cantilever magnetic drive pump with homodromous impeller arrangement |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |
|
| CX01 | Expiry of patent term |