CN204099214U - Steady formula small flow height rotating speed double shell centrifugal water-injection pump - Google Patents
Steady formula small flow height rotating speed double shell centrifugal water-injection pump Download PDFInfo
- Publication number
- CN204099214U CN204099214U CN201420429870.6U CN201420429870U CN204099214U CN 204099214 U CN204099214 U CN 204099214U CN 201420429870 U CN201420429870 U CN 201420429870U CN 204099214 U CN204099214 U CN 204099214U
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- Prior art keywords
- pump
- stator
- final stage
- rotating speed
- small flow
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- Expired - Lifetime
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- 238000002347 injection Methods 0.000 title claims abstract description 16
- 239000007924 injection Substances 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000005253 cladding Methods 0.000 claims description 4
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 4
- 210000004907 gland Anatomy 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a kind of steadily formula small flow height rotating speed double shell centrifugal water-injection pump, comprise pump barrel body (4), pump cover (5), frame set, rotor assembly, bearing unit, mechanical sealing assembly (2), described frame set comprise be connected successively suction letter body (3), stage casing (8), final stage stage casing (10), stator (16) and final stage stator (11), the waterpower of described stator, final stage stator is imported and exported to increase progressively by 10 ° ~ 15 ° successively from the stator of the first order to final stage stator every grade of orientation angle and is rotated layout.The utility model effectively can play the huge water hammer that balanced each stator all directions throw away, thus greatly reduce the operate water hammer that brings of pump and pump is produced vibrate, effectively improve the reliability and stability of pump, pump can be balanced and effectively run, and reduce the noise and vibration of pump.
Description
Technical field
The present invention relates to a kind of centrifugal pump, specifically relate to a kind of high rotating speed double shell centrifugal water-injection pump.
Background technique
In the project of oil field concerning foreign affairs, usually can run into the selection issue of low-flow high-lift centrifugal water-injection pump, due to oil field concerning foreign affairs, to have water injection rate little, and water injection pressure is high, and the feature containing a large amount of chlorion and mineralizer.Especially be located in the oil field (as Iranian Asia reaches oil field) of desert region, the Middle East, the specified water injection rate of its individual well is 50m
3/ h, discharge pressure is 30MPa, and chlorine ion concentration can reach 165000mg/L.
Centrifugal pump runs under this operating mode, and the centrifugal pump of existing rotating speed 2980r/min cannot meet its performance requirement again, and general stainless steel also cannot meet its corrosion-resistant requirement.As plunger pump selected by centrifugal pump, because plunger pump is in running, the high-speed and continuous friction of its plunger valve and pump cylinder, makes the decay resistance of the valve body surface of pump cylinder and plunger valve sharply descend degradation reason, can not meet the corrosion-resistant requirement of conveying high chloride ion content.Especially for large-scale like this plunger pump, its noise and vibration will much larger than Ordinary Centrifugal Pumps, and the life-span of each parts with frication pair is also difficult to ensure.Moreover this plunger pump easily damaged parts is many, even if normally run, its fittings cost changed also has costliness, and for the plunger pump of two phase stainless steel material, its expense changing accessory is larger.Because centrifugal pump discharge capacity is even, smooth performance, the advantages such as making and installation cost is low, and structure is simple and easy to maintenance, thus develop a kind of small flow height rotating speed double shell centrifugal water-injection pump to such regional oil field high yield, stable yields and reduction oil field development cost all tool be of great significance.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, and a kind of stable, steady formula small flow height rotating speed double shell centrifugal water-injection pump that noise and vibration is less is provided.
Objects of the present invention are achieved through the following technical solutions: steadily formula small flow height rotating speed double shell centrifugal water-injection pump, comprise pump barrel body, pump cover, frame set, rotor assembly, bearing unit, mechanical sealing assembly, this frame set is pressed abd fixed in pump barrel body by pump cover, described frame set comprise be connected successively suction letter body, stage casing, final stage stage casing, stator and final stage stator, the waterpower of described stator, final stage stator is imported and exported to increase progressively to rotate by 10 ° ~ 15 ° successively from the stator of the first order to final stage stator every grade of orientation angle and is arranged.
After adopting the present invention, every grade of impeller due to rotor assembly adopts interference fit to be arranged on its pump shaft, the assembly precision of each impeller and pump shaft is improved, blind-mate between each impeller and pump shaft, improve the stability that pump shaft runs up, so each impeller gets rid of fed sheet of a media in the middle of the stator, final stage stator of frame set under being driven by the high speed of pump shaft again, import and export orientation angle due to each stator waterpower controls to increase progressively to rotate by 10 ° ~ 15 ° successively at every grade to arrange, effectively serves the huge water hammer that balanced each stator all directions throw away.Thus greatly reduce the water hammer brought that operate of centrifugal water-injection pump and make pump produce vibration, effectively improve the reliability and stability of pump, make pump can balance effective operation, and reduce the noise and vibration of pump.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and mode of execution, the present invention is described in further detail.
Fig. 1 is structural representation of the present invention.
Fig. 2 circumference uniform distribution schematic diagram that to be some grades of stators in Fig. 1 import and export to the waterpower of final stage stator.
Fig. 3 is the schematic diagram that in Fig. 1, pump barrel body and pump cover all have Stainless Steel Alloy overlay cladding.
Embodiment
See figures.1.and.2 known, the present invention's steady formula small flow height rotating speed double shell centrifugal water-injection pump, comprise pump barrel body 4, pump cover 5, frame set, rotor assembly, bearing unit is (containing left bearing assembly 1, right bearing assembly 6), mechanical sealing assembly 2, described frame set comprises the suction letter body 3 be connected successively, stage casing 8, final stage stage casing 10, stator 16 (some levels, except final stage stator) and final stage stator 11, described stator 16, the waterpower of final stage stator 11 is imported and exported to increase progressively by 10 ° ~ 15 ° (arranging with certain fixed numbers angle within the scope of these) successively from the stator of the first order to final stage stator every grade of orientation angle and is rotated layout (as shown in Figure 2, when blade 20 number on stator 16 is nine pieces, increase progressively according to 10 ° and rotate to being one week during 30 ° of scopes, its angular range is in 0 ° ~ 60 ° scopes, because the progression of pump is different, arrange that total angle scope is also different, its calculation method is: [each stator number N-1] × 15 °).This frame set is compressed by pump cover 5 and uses (greatly) bolt 17 to be fixed in pump barrel body 4 (double shell form shows as: form binocular structure at frame set overcoat last layer pump barrel body 4).The huge water hammer that this kind of small flow height rotating speed Centrifugal Pump Design multiple stator of energy efficient balance and final stage stator all directions throw away, reduces the vibration values of centrifugal pump in running.
Described rotor assembly comprises impeller 7 (several), pump shaft 18, composition such as balancing drum 12 grade, several impeller 7 adopts hot charging form, and (hot charging form body is present: impeller 7 is under cold conditions state, the interference fit of impeller 7 endoporus and pump shaft 18 is of a size of 0.035mm ~ 0.05mm, then by between heating 7 to 150 DEG C, impeller ~ 200 DEG C time, due to the principle of expanding with heat and contract with cold make impeller 7 hole size increase to impeller 7 reasonably fitted position time, then impeller 7 installs on pump shaft 18 under the state of being heated, and be fixed on relevant position on pump shaft 18 with impeller snap ring 19, after impeller 7 cools, impeller 7 hole size retract the size of original cold conditions time, so just can make being engaged on pump shaft 18 of impeller 7 interference) be enclosed within pump shaft 18, namely each described impeller 7 is located by impeller snap ring 19 and is enclosed within pump shaft 18 separately, described balancing drum 12 is by pressure ring 13, point half snap ring 14 balance drum gland 15 is fixed on pump shaft 18, the pump shaft of described rotor assembly is supported by the left bearing assembly 1 of bearing unit, right bearing assembly 6 and is made this centrifugal pump smooth running.
Known with reference to Fig. 1, Fig. 3; on described pump barrel body 4 and pump cover 5 and in the inside and this pump of pump barrel body and pump cover fed sheet of a media connecting part surface on all there is (built-up welding mode) Stainless Steel Alloy overlay cladding 9; play protection pump barrel body and pump cover, the chloride ion corrosion of high concentration and washing away of ultrahigh pressure fed sheet of a media can be stood.Because the material of main part of pump barrel body and pump cover adopts 20MnMo carbon steel material can effectively reduce pump manufacture cost; add that the surface overlaying contacted with fed sheet of a media has the Stainless Steel Alloy overlay cladding of antiscour and anti-chlorine ion corrosion; pump barrel body and pump cover can be protected not to be corroded, improve again its sluicing.
Claims (3)
1. steady formula small flow height rotating speed double shell centrifugal water-injection pump, comprise pump barrel body (4), pump cover (5), frame set, rotor assembly, bearing unit, mechanical sealing assembly (2), this frame set is pressed abd fixed in pump barrel body by pump cover, it is characterized in that: described frame set comprises the suction letter body (3) be connected successively, stage casing (8), final stage stage casing (10), stator (16) and final stage stator (11), described stator (16), the waterpower of final stage stator (11) is imported and exported to increase progressively to rotate by 10 ° ~ 15 ° successively from the stator of the first order to final stage stator every grade of orientation angle and is arranged.
2. steady formula small flow height rotating speed double shell centrifugal water-injection pump according to claim 1, is characterized in that: upper and surface that is fed sheet of a media connecting part in the inside and this pump of pump barrel body and pump cover all has Stainless Steel Alloy overlay cladding (9) at described pump barrel body (4) and pump cover (5).
3. steady formula small flow height rotating speed double shell centrifugal water-injection pump according to claim 1 and 2, it is characterized in that: described rotor assembly comprises impeller (7), pump shaft (18), balancing drum (12), each described impeller (7) is located by impeller snap ring (19) separately and is enclosed within pump shaft (18), and described balancing drum (12) is fixed on pump shaft (18) by pressure ring (13), point half snap ring (14) balance drum gland (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420429870.6U CN204099214U (en) | 2014-07-24 | 2014-07-24 | Steady formula small flow height rotating speed double shell centrifugal water-injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420429870.6U CN204099214U (en) | 2014-07-24 | 2014-07-24 | Steady formula small flow height rotating speed double shell centrifugal water-injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204099214U true CN204099214U (en) | 2015-01-14 |
Family
ID=52267646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420429870.6U Expired - Lifetime CN204099214U (en) | 2014-07-24 | 2014-07-24 | Steady formula small flow height rotating speed double shell centrifugal water-injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204099214U (en) |
-
2014
- 2014-07-24 CN CN201420429870.6U patent/CN204099214U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150114 |