CN202326271U - High-pressure-resistant sealed horizontal space multi-stage centrifugal pump - Google Patents
High-pressure-resistant sealed horizontal space multi-stage centrifugal pump Download PDFInfo
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- CN202326271U CN202326271U CN2011204673233U CN201120467323U CN202326271U CN 202326271 U CN202326271 U CN 202326271U CN 2011204673233 U CN2011204673233 U CN 2011204673233U CN 201120467323 U CN201120467323 U CN 201120467323U CN 202326271 U CN202326271 U CN 202326271U
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- pump
- shaft
- centrifugal pump
- cover
- pressure
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Abstract
The utility model discloses a high-pressure-resistant sealed horizontal space multi-stage centrifugal pump, comprising a pump cover (9), a pump body (8), a pump shaft(1), an impeller, and an intermediate bushing (14), wherein a bearing part (2) and a coupling (28) are mounted on the pump shaft (1); mechanical sealing parts (16) are mounted on the pump shaft (1) and at two ends of the pump cover (9) and the pump body (8); a shaft sleeve (13) is mounted between the intermediate bushing (14) and the pump shaft (1); and the shaft sleeve (13) and the intermediate bushing (14) are connected in a labyrinth sealing and matching way by helical threads. The high-pressure-resistant sealed horizontal space multi-stage centrifugal pump can meet the greater use, has small volume, light weight, good sealing property, compact structure, reliability in running, good balance and convenience in maintenance and overhaul, and can be widely used on pump field water injection oil pipelines.
Description
Technical field
The utility model relates to a kind of centrifugal pump, specifically relates to drive multistage centrifugal pump in a kind of level.
Background technique
At present, open in the horizontal type level of domestic use that multistage centrifugal pump makes cylinder iron or the carbon steel manufacturing, its inter-stage adopts the external transient mode of big syphon; In open face and use the colloid asbestos packing as the static seal pad; The axle envelope is packing seal; Interstage bushing adopts general gap sealing.Thereby make the bulky of this centrifugal pump, weight is overweight, generally only is used for carrying the aqueous medium of cleaning; The flow of centrifugal pump is less, pressure is lower, and lift is below 500m, and its inter-stage leaks the raising that has influenced pump efficiency greatly.
Be suitable for to carry sulfur-bearing, acid water, corrosion resistant occasion in order to satisfy high pressure resistant sealing, and make that pump volume is little, in light weight, good seal, operation safety and reliability, make water-flooding pump for oil field and the pipeline oil transportation pump uses more to adapt to.Along with the development of making rapid progress of petroleum industry, this type multistage centrifugal pump requirement is increasing, the international market (like Iraq's oil field development etc.) ten minutes needs.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned deficiency, and provide a kind of good seal, the operation safety and reliability high pressure resistant sealing level in drive multistage centrifugal pump.
The utility model is that the technological scheme that its technical problem of solution is adopted is: drive multistage centrifugal pump in a kind of high pressure resistant sealing level; Comprise pump cover, the pump housing, pump shaft, impeller, interstage bushing; Bearing part and coupling are housed on pump shaft; On pump shaft and at the two ends of the pump cover and the pump housing, the mechanical seal parts are housed, between said interstage bushing and the pump shaft axle sleeve are housed, and be connected for the mazy type screw is sealed and matched between this axle sleeve and the interstage bushing.
After adopting the utility model structure, establish mazy type reverse acting spiral groove between interstage bushing and the axle sleeve and reduce the inter-stage leakage, improve the volumetric efficiency of pump; Its flow passage part adopts super-duplex stainless steel to make, and pump is normally used in the acid water deep-etching situation of sulfur-bearing.The utility model can satisfy bigger purposes, good seal, compact structure, reliable, balance good, Maintenance and Repair are convenient, can extensive use on pump field water filling petroleum pipeline.
Description of drawings
Below in conjunction with accompanying drawing and mode of execution the utility model is described in further detail
Fig. 1 is for opening the sectional structure schematic representation of multistage centrifugal pump in the high pressure resistant sealing level of the utility model.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is the generalized section of the volute chamber that spues (two volute chamber structure) among Fig. 1.
Fig. 4 is for opening face seal pad schematic representation in the utility model.
Fig. 5 is interstage bushing among Fig. 1 and the spiral fluted structural representation that has thereof.
Fig. 6 is for opening the sectional structure schematic representation of multistage centrifugal pump in the known level.
Embodiment
Can know referring to figs. 1 through Fig. 5; Drive multistage centrifugal pump in the high pressure resistant sealing level of the utility model; Comprise pump cover 9, the pump housing 8, pump shaft 1, impeller, interstage bushing 14, bearing part 2 and coupling 28 are housed on pump shaft 1, on pump shaft 1 and at the pump cover 9 and the two ends of the pump housing 8, mechanical seal parts 16 are housed; Between said interstage bushing 14 and the pump shaft 1 axle sleeve 13 is housed, and is connected for the mazy type screw is sealed and matched between this axle sleeve 13 and the interstage bushing 14.Said impeller can be divided into first stage impeller 5, secondary impeller 7 (having four), impeller 6.Have inner flow passage 12 transition in the periphery of said pump cover 9 and form as one with pump cover 9, said impeller and pump cover 9, the pump housing 8 form spues and is mutually 180 ° between the volute chamber 27 and arranges, and this volute chamber 27 that spues is two volute chamber structures.It utilizes the height of transition runner minimizing pump in the body, conserve space, thus make pump volume little, in light weight; Employing is mutually 180 ° to adjacent volute chamber and arranges and adopt two volute chamber structures and radial force that the balance impeller causes.
Can know with reference to Fig. 6, drive multistage centrifugal pump in the level of conventional known, the flow that the volute chamber that spues of its impeller (half place of sum) spues need get into its next stage impeller eye through external big syphon 11; And the utility model is to adopt the inner flow passage 12 through being close to pump cover to get into the next stage impeller eye.Make the volume of driving centrifugal pump in this area that takes up room littler like this, also alleviated pump weight.Certainly this brings certain difficulty can for the work such as casting, desanding of pump, but these overcome at present.This pump is except that adopting the adjacent volute chamber that spues to be mutually 180 ° of layouts, and the volute chamber that respectively spues all adopts two volute chamber structure (see figure 3)s, and this more traditional single volute chamber structure more can the balance radial force, makes multistage pump not receive the interference of radial force and operation more stably.
As shown in Figure 1, open half place of multistage pump impeller sum in the level and be provided with interstage bushing 14 with pump shaft between the impeller 6, this be the sealing of multistage pump inter-stage than one of vitals, traditional middle-opening pump adopts less radial clearance to reach the purpose that reduces leakage.This pump is employed on axle sleeve 13 outer surfaces and interstage bushing 14 internal surfaces and all sets up screw; Make the fluid of flowing through between the two produce turbulent flow; Utilize the turbulent skin friction principle design to become labyrinth seal form (see figure 5); The radial clearance that has interstage bushing 14 endoporus and corresponding axle sleeve 13 plays and reduces the effect of sewing; Be respectively equipped with identical number, identical helical pitch, helix angle at interstage bushing 14 bore areas with axle sleeve 13 outer surfaces, but the spiral chute of high a such as in the opposite direction, wide b, its spiral sense of rotation is to stop that high pressure side liquid shifts to low voltage side.Like Fig. 1, see from coupling 28 directions of this pump, when pump when turning clockwise, then the spiral chute in the interstage bushing should be the dextrorotation direction, the spiral on its corresponding axle sleeve is a left hand direction.
When driving multistage pump in the level along with pump duty increases, increased pressure is during greater than 5MPa, open face seal pad (being traditional gum asbestos board material) in common between said pump cover 9 and the pump housing 8 and washed away by high pressure liquid stream, do not have the effect of the face of opening in the sealing.Especially when carrying the acid water of sulfur-bearing, its rotproofness has also satisfied not requirement; Certainly, utilize high precise equipment (like the numerical control bed) processing to open face in making and reach highly smooth, straight, in open and be coated with sealer methods such as (like MF2 novel steam machine cylinder seal fat) on the face and can substitute.But because the condition device-restrictive, equipment cost is too high, and pump cover pump housing weight is overweight, in open the dough figurine worker and grind and can't carry out.Attempt a kind of carbon fiber bar and metal composite sealing plate at present and open the material of the sealing gasket of the face of opening in the multistage pump in making; Promptly between the said pump cover 9 and the pump housing 8 in open face seal pad 20 and be carbon fiber bar and metal composite sealing plate (seeing Fig. 2, Fig. 4); And formulate special processes, control decrement; To the controlling tight power of kingbolt 19,, make big flow Q=500-600m again with specific torque spanner and rational programmed sequence of operations
3/ n, pressure reach in the level of P=10MPa drives multistage pump, through former speed test and P=12MPa hydrostatic test checking, has passed through the withstand voltage pass of the face of opening in the middle-opening pump with opening the face seal pad in this.
Another behave of the utility model is: at the two ends of the said pump housing 8, pump cover 9 whole Seal cage 15 is set; And in be provided with the axial leakage that mechanical seal parts 16 are eliminated this centrifugal pump; Open multistage centrifugal pump runtime verification under former fast state in the level of band mechanical seal and reach desired effects fully, realize few the leakage or leak free requirement.
As shown in Figure 2, open multistage centrifugal pump intake 17 and discharge opening 18 in the utility model level all on the pump housing below the pump shaft axis 8, between the one-tenth level with axis normal; The parting plane of the pump housing 8, pump cover 9 becomes substantially horizontal on shaft axis, so that open whole parts in the pump cover inspection pump, need not to dismantle water inlet, discharge conduit and prime mover, and its maintenance is very convenient.
For satisfying conveying such as the medium of the seriously corrodeds such as acid water of sulfur-bearing, to drive multistage pump in the high pressure resistant sealing level of super-duplex stainless steel and still belong to the first time, this behave also causes colleague's concern.Two phase stainless steel has very excellent performance, and super-duplex stainless steel is better, and its yield strength is 2 times of common stainless steel; When chlorine ion concentration is high; Its anti-spot corrosion, crevice corrosion, stress corrosion and fatigue corrosion performance all are superior to common stainless steel, have good toughness and weldability, though dual phase steel acquires a certain degree of difficulty in casting and cold working; We have overcome casting and cold working difficulty and have successfully accomplished the manufacturing of product; Make and open the expansion of multistage pump application area in the level, make middle-opening pump be applied to bigger flow, more high-lift and various medium, as making sea water pump etc.The utility model adopts in the super-duplex stainless steel manufacture level and opens flow passage components, and pump displacement is enlarged (to 500-600m
3/ n), improve pressure (lift 1000m, power 1800kW), and in the acid water strong corrosive medium of sulfur-bearing, normally use.Drive multistage centrifugal pump in the level in oil-field flooding, the extensive use of pipeline oil transportation field thereby make, reach considerable economic effect and good social benefit.
Claims (3)
1. drive multistage centrifugal pump in a high pressure resistant sealing level; Comprise pump cover (9), the pump housing (8), pump shaft (1), impeller, interstage bushing (14); Bearing part (2) and coupling (28) are housed on pump shaft (1); Go up and mechanical seal parts (16) are housed at pump shaft (1), it is characterized in that: between said interstage bushing (14) and the pump shaft (1) axle sleeve (13) is housed, and is connected for the mazy type screw is sealed and matched between this axle sleeve (13) and the interstage bushing (14) at the pump cover (9) and the two ends of the pump housing (8).
2. drive multistage centrifugal pump in the high pressure resistant sealing level as claimed in claim 1, it is characterized in that: opening face seal pad (20) between the said pump cover (9) and the pump housing (8) is carbon fiber bar and metal composite sealing plate.
3. drive multistage centrifugal pump in according to claim 1 or claim 2 the high pressure resistant sealing level; It is characterized in that: whole Seal cage (15) is set at the two ends of the said pump housing (8), pump cover (9), and in be provided with the axial leakage that mechanical seal parts (16) are eliminated this centrifugal pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204673233U CN202326271U (en) | 2011-11-18 | 2011-11-18 | High-pressure-resistant sealed horizontal space multi-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204673233U CN202326271U (en) | 2011-11-18 | 2011-11-18 | High-pressure-resistant sealed horizontal space multi-stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202326271U true CN202326271U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204673233U Expired - Fee Related CN202326271U (en) | 2011-11-18 | 2011-11-18 | High-pressure-resistant sealed horizontal space multi-stage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202326271U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104813033A (en) * | 2012-10-15 | 2015-07-29 | 诺沃皮尼奥内股份有限公司 | High efficiency low specific speed centrifugal pump |
-
2011
- 2011-11-18 CN CN2011204673233U patent/CN202326271U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104813033A (en) * | 2012-10-15 | 2015-07-29 | 诺沃皮尼奥内股份有限公司 | High efficiency low specific speed centrifugal pump |
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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 |
Granted publication date: 20120711 Termination date: 20151118 |
|
| EXPY | Termination of patent right or utility model |