CN202402289U - Self-balancing section-type multi-stage centrifugal pump - Google Patents
Self-balancing section-type multi-stage centrifugal pump Download PDFInfo
- Publication number
- CN202402289U CN202402289U CN2011205337827U CN201120533782U CN202402289U CN 202402289 U CN202402289 U CN 202402289U CN 2011205337827 U CN2011205337827 U CN 2011205337827U CN 201120533782 U CN201120533782 U CN 201120533782U CN 202402289 U CN202402289 U CN 202402289U
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- bearing
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- centrifugal pump
- suction casing
- axle sleeve
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Abstract
The utility model discloses a self-balancing section-type multi-stage centrifugal pump, which comprises a pump case assembly, a rotor assembly (1) and a bearing assembly, wherein the pump case assembly is composed of a suction section (2), a left middle section (3), a middle discharge section (29), a tail stage discharge section (30), a right middle section (10) and a middle suction section (12) which are sequentially connected, and the middle discharge section and the tail stage discharge section form an integral discharge section in the whole. A balance pipe (48) is connected between a second bearing support (45) on the lateral side of the middle suction section and a first bearing support (44) on the lateral side of the suction section. The self-balancing section-type multi-stage centrifugal pump reduces accumulative errors caused by combination of a plurality of parts, saves raw materials and machining working hours, improves dimensional accuracy of the parts, and is small in volume, light in weight, good in sealing, compact in structure, safe and reliable in operation, good in balance, capable of achieving purposes and using for transporting a medium with impurities and widely applicable to oilfield flooding, crude oil transportation, petrifaction chemical industry washing tower water supply and the like.
Description
Technical field
The utility model relates to a kind of centrifugal pump, specifically relates to a kind of self balancing sectional type multistage centrifugal pump.
Background technique
At present, the sectional type multistage centrifugal pump that uses both at home and abroad all is strict with the medium of conveying for not containing the clear water or the similar applications of particle and impurity.This is because general sectional type multistage centrifugal pump adopts like Balance disc, balancing drum isoequilibrium mechanism.In the medium of carrying, there are particle (abrasive material) and impurity can cause balanced controls accelerated wear test, influence the effect that balanced controls play balancing axial thrust, thereby centrifugal pump was lost efficacy.Along with oil-field flooding, generally all near the building site, to fetch water, each water source geographical conditions is intricate, is difficult to avoid contain in the water sand grains; And for example contain 0.5% lime-ash (abrasive material) of having an appointment in the feedwater of the scrubber tower of chemical engineering, if use the segmental centrifugal pump of band balanced controls, medium medium sand or lime-ash can make the erosion corrosion property aggravation of balanced controls, and balanced controls were lost efficacy, and centrifugal pump is damaged.Adopt like this and open self balancing in the level of no balanced controls or self balancing sectional type multistage centrifugal pump is inevitable.
Along with the development of making rapid progress of petrochemical industry industry, in order to satisfy above-mentioned user's requirement, and make the centrifugal pump volume little, in light weight, the operation safety and reliability is so that can adapt to oil-field flooding and the scrubber tower feedwater is used.This type self balancing sectional type multistage centrifugal pump, requirement is increasing, and international market (like Kazakhstan oil field) ten minutes needs.Can know with reference to Fig. 4; The middle Spit Section 29 and the final stage Spit Section 30 of known self balancing sectional type multistage centrifugal pump are two independent parts; Its corresponding centre volute chamber and final stage volute chamber that spues that spues is in respectively on above-mentioned two Spit Sections; Exist a plurality of part combinations and cause the not compact problem of accumulated error, structure, influenced the operation and the Security of this centrifugal pump.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of compact structure, operation safety and reliability, self balancing sectional type multistage centrifugal pump that volume is little are provided.
The purpose of the utility model realizes through following technological scheme: a kind of self balancing sectional type multistage centrifugal pump; Comprise pump case assembly, rotor assembly, bearing unit; Wherein the pump case assembly is made up of the suction casing, left stage casing, middle Spit Section, final stage Spit Section, right stage casing, the middle suction casing that link to each other successively, and said middle Spit Section and final stage Spit Section form the Spit Section of integrated with integrative-structure.
Be connected with balance tube between the bearing bracket stand first of the bearing bracket stand second of suction casing side and suction casing side in the middle of said, so that the bearing seal pressure of middle suction casing side descends, minimizing is sewed, and increases the life-span that bearing seals.
The utility model has reduced the accumulated error that the combination of a plurality of parts causes, and saves raw material and machining man-hour, the raising parts size precision, and volume is little; In light weight, good seal, compact structure; Safe and reliable to operation, balance is good, can satisfy bigger purposes; Can be used for the medium of conveyor belt impurity, can be in oil-field flooding, extensive use is gone up in Crude Oil Transportation and the feedwater of petrochemical industry chemical industry scrubber tower etc.
Description of drawings
Below in conjunction with accompanying drawing and mode of execution the utility model is done and to be further described.
Fig. 1 is the structural representation of the utility model self balancing sectional type multistage centrifugal pump.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is interstage bushing and the spiral fluted structural representation thereof among Fig. 1.
Fig. 4 is known self balancing sectional type multistage centrifugal pump structural representation.
Embodiment
Can know with reference to Fig. 1, Fig. 2; The utility model self balancing sectional type multistage centrifugal pump; Comprise pump case assembly, rotor assembly 1, bearing unit; Wherein the pump case assembly is made up of the suction casing 2 that links to each other successively, left stage casing 3 (comprising left stator 4), middle Spit Section 29 (be with left last stator 5 and centre spue volute chamber 6), final stage Spit Section 30 (be with right last stator 7 and final stage spue volute chamber 8), right stage casing 10 (comprising right stator 11), middle suction casing 12, said in the middle of Spit Section 29 and final stage Spit Section 30 form the Spit Section 9 of integrated with integrative-structure.As shown in Figure 1, be fixed on suction casing housing 2 and the middle suction casing 12 at the tightening nut 13 through its two ends on the rod 14, above-mentioned each stage casing and Spit Section are fixedly clamped, evenly tightly, make the pump case assembly become an integral body by the rod 14 that is symmetrically distributed; Transition tube 15 links to each other the centre volute chamber 6 that spues with middle suction casing 12, realize the continuous conveying function of liquid.
Can know that with reference to Fig. 4 the middle Spit Section 29 and the final stage Spit Section 30 of the self balancing sectional type multistage centrifugal pump of conventional known are two independent parts.The utility model is to be integrated these two Spit Sections; The volute chamber 6 that spues wherein spues volute chamber 8 coexistences on a Spit Section 9 with final stage; Make centrifugal pump structure compacter like this, save raw material and machining man-hour, reduce a plurality of parts and make up and cause accumulated error; Improve parts size precision, make the centrifugal pump operation safer.
Wherein, can know that rotor assembly 1 is taken turns lobus dexter wheel 18, rotating shaft 19, middle axle sleeve 20, axle sleeve first 21, the axle sleeve second 22 of 17 quantity and formed by first stage impeller 16, several lobus sinisters wheel 17 and be equal to first stage impeller 16 and the lobus sinister of its reversed arrangement like Fig. 1.Arrange it is the mutual balance of axial force that each above-mentioned impeller is produced like this, the title of its " self balancing " is come at this point.Said bearing unit is made up of the bearing part second 24 of the bearing part first 23 of suction casing 2 sides, bearing bracket stand first 44 and middle suction casing 12 sides, bearing bracket stand second 45; Wherein bearing part first 23 comprises the sliding bearing first 25 of bearing radial load, and bearing part second 24 comprises the sliding bearing second 26 of bearing radial load and bears the rolling ball bearing 27 of residual axial force; Sliding bearing first 25 can be in the bearing support first 28 of bearing part first 23, and sliding bearing second 26 and rolling ball bearing 27 can be in the bearing support second 39 of bearing part second 24.Bearing unit drives its disc 49 by the rotating shaft rotation and splashes the thin oil in the bearing support oil sump 35 to lubricate, and rotating shaft 19 is run well.Can think through designing and calculating in theory: the axial force that the impeller of self balancing sectional type multistage centrifugal pump causes is a balance; But because the change of pump operation operating mode; Contain foreign material in the fed sheet of a media, flowing state is ever-changing; Pump long-time running friction pair dimensional changes etc. distribute the pump axial force and change, and on engineering, are provided with and prevent that the structure that residual axial force produces from being necessary.
Said Spit Section 9 is provided with interstage bushing 31; On suction casing 2, be provided with and suck lining 32; Suck lining 33 in the middle of on middle suction casing 12, being provided with; Middle axle sleeve 20 in this interstage bushing 31 and the rotor assembly rotating shaft 19; This sucks the axle sleeve first 21 in lining 32 and the rotor assembly rotating shaft 19, and this centre sucks the three pairs of friction pairs of axle sleeve second 22 each self-forming (conventional centrifugal pump adopts less radial clearances to these three pairs of friction pairs, reduces the purpose of revealing to reach) in lining and the rotor assembly rotating shaft 19; The utility model multistage centrifugal pump then is employed in interstage bushing 31, sucks lining 32, set up screw be sealed and matched (as shown in Figure 3) on the middle internal surface that sucks lining 33 with on the outer surface of corresponding middle axle sleeve 20, axle sleeve first 21, axle sleeve second 22; Make this fluid between the two of flowing through produce wadding stream, produce one power; Stop that high pressure side liquid shifts to low voltage side; Stop in the little gap of the impurity engaging friction pair in the liquid; Enter if any small amount of impurities, it is rested in the spacious notch, to be unlikely to the little gap of wearing and tearing.
Self balancing sectional type multistage centrifugal pump in another measure of satisfy carrying impure two phase flow is: each friction pair of centrifugal pump is had " strong physique " (being relative static part), like interstage bushing 31, suck lining 32, the middle component such as lining 33, casing ring 34, stator cover 35 that suck adopt wear-resisting, as to be difficult for interlock material.Internal surface hardness HB >=325～380 of part friction pair; Revolving part such as middle axle sleeve 20, axle sleeve first 21, axle sleeve second 22, impeller ring 36, axle sleeve 37 parts such as grade be according to unlike material, through the different process means, like surface hardening, pile-up welding hard alloy, flow harden, means such as metalizing make its surface hardness HRC >=50.The quiet kinetic friction pair of forming is like this used on self balancing sectional type multistage centrifugal pump, plays good effect, prevents the sound interlock, guarantees that pump normally moves.
Self balancing sectional type multistage centrifugal pump be make through middle suction casing 12 unlikely excessive with the pressure of 45 pairs of packing cavities 46 of bearing bracket stand second; And influence should be located the working life of filler 47 (or mechanical seal); Be connected with balance tube 48 between the bearing bracket stand first 44 of the bearing bracket stand second 45 of suction casing 12 sides and suction casing 2 sides in the middle of said, thereby packing cavity 46 pressure of centre suction casing 12 sides are obviously descended.So both make the centrifugal pump smooth running, increased the working life of filler 47 (or mechanical seal) again.
Claims (4)
1. self balancing sectional type multistage centrifugal pump; Comprise pump case assembly, rotor assembly (1), bearing unit; Wherein the pump case assembly is made up of the suction casing (2), left stage casing (3), middle Spit Section (29), final stage Spit Section (30), right stage casing (10), the middle suction casing (12) that link to each other successively, it is characterized in that: Spit Section (29) form the Spit Section (9) of integrated with integrative-structure with final stage Spit Section (30) in the middle of said.
2. self balancing sectional type multistage centrifugal pump as claimed in claim 1 is characterized in that: be connected with balance tube (48) between the bearing bracket stand first (44) of the bearing bracket stand second (45) of suction casing (12) side and suction casing (2) side in the middle of said.
3. according to claim 1 or claim 2 self balancing sectional type multistage centrifugal pump; It is characterized in that: said Spit Section (9) are provided with interstage bushing (31); On suction casing (2), be provided with and suck lining (32); Suck lining (33) in the middle of on middle suction casing (12), being provided with; Middle axle sleeve (20) in this interstage bushing (31) and the rotor assembly rotating shaft (19), this sucks the axle sleeve first (21) in lining (32) and the rotor assembly rotating shaft (19), and this centre sucks the three pairs of friction pairs of each self-forming of axle sleeve second (22) in lining and the rotor assembly rotating shaft (19); At interstage bushing (31), suck on lining (32), the middle internal surface that sucks lining (33) and to set up screw on the outer surface with corresponding middle axle sleeve (20), axle sleeve first (21), axle sleeve second (22) and be sealed and matched.
4. self balancing sectional type multistage centrifugal pump as claimed in claim 1; It is characterized in that: said bearing unit is made up of with bearing part second (24), the bearing bracket stand second (45) of middle suction casing (12) side bearing part first (23), the bearing bracket stand first (44) of suction casing (2) side; Wherein bearing part first (23) comprises the sliding bearing first (25) of bearing radial load, and bearing part second (24) comprises the sliding bearing second (26) of bearing radial load and bears the rolling ball bearing (27) of residual axial force; Sliding bearing first (25) can be in the bearing support first (28) of bearing part first (23), and sliding bearing second (26) and rolling ball bearing (27) can be in the bearing support second (39) of bearing part second (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205337827U CN202402289U (en) | 2011-12-13 | 2011-12-13 | Self-balancing section-type multi-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205337827U CN202402289U (en) | 2011-12-13 | 2011-12-13 | Self-balancing section-type multi-stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202402289U true CN202402289U (en) | 2012-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205337827U Expired - Lifetime CN202402289U (en) | 2011-12-13 | 2011-12-13 | Self-balancing section-type multi-stage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202402289U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080989A (en) * | 2019-05-20 | 2019-08-02 | 大连深蓝泵业有限公司 | Coaxial-type is arranged symmetrically multistage hydraulic turbine and directly drives pump and its application method |
| CN111946638A (en) * | 2020-09-17 | 2020-11-17 | 珠海格力电器股份有限公司 | Multistage centrifugal compressor and refrigerating system |
-
2011
- 2011-12-13 CN CN2011205337827U patent/CN202402289U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080989A (en) * | 2019-05-20 | 2019-08-02 | 大连深蓝泵业有限公司 | Coaxial-type is arranged symmetrically multistage hydraulic turbine and directly drives pump and its application method |
| CN111946638A (en) * | 2020-09-17 | 2020-11-17 | 珠海格力电器股份有限公司 | Multistage centrifugal compressor and refrigerating system |
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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 |
Granted publication date: 20120829 |
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| CX01 | Expiry of patent term |