CN101892989B - High-pressure double suction pump - Google Patents
High-pressure double suction pump Download PDFInfo
- Publication number
- CN101892989B CN101892989B CN2010102002662A CN201010200266A CN101892989B CN 101892989 B CN101892989 B CN 101892989B CN 2010102002662 A CN2010102002662 A CN 2010102002662A CN 201010200266 A CN201010200266 A CN 201010200266A CN 101892989 B CN101892989 B CN 101892989B
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- section
- high pressure
- seal section
- port ring
- impeller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/006—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps double suction pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
- F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a high-pressure double suction pump. The pump comprises a suction chamber, a pump case, an impeller, a shaft, a packaged mechanical seal device arranged between the pump case and the shaft, an impeller ring seal device and a mechanical seal flushing device, wherein the suction chamber comprises a suction port, a flow distributing section and a spiral section; the flow splitting section comprises a left passage, a right passage and a volute wall between the left passage and the right passage; the volute wall is provided with a water distributing tongue extending towards the suction port; and the outer surface of the flow distributing section of the suction chamber is provided with at least one radial reinforcing rib which encircles the flow distributing section by a circle. The double suction pump solves the technical problems of low efficiency of the suction chamber, long time of hydraulic strength tests, easily failed mechanically sealed brake device and poor sealing effect of the ring, improves the efficiency of the suction chamber, shortens the testing time, reduces tooling, and stops the problems that the brake device flicks and fails in a high pressure working environment.
Description
Technical field
The present invention relates to a kind of double suction pump.
Background technique
There is following problem in existing double suction pump:
1, the spiral case wall in the suction chamber is the round end structure, and is as shown in Figure 2, and it is big to receive the resistance that the spiral case wall streams in the time of in the fluid suction pump, causes the efficient of suction chamber also low.
What 2, suction chamber bore during pump work is suction pressure, and pressure is lower, and what the pumping chamber spiral case bore is high pressure.Because every pump housing all need carry out the hydraulic pressure strength test when producing, can't bear high pressure for fear of the suction chamber that bears low pressure, suppress so need carry out the branch chamber suction chamber and pumping chamber.Need special frock with suction chamber and pumping chamber isolation but the branch chamber is suppressed, cause the strength test time long, frock is complicated.
3, integrated mechanical sealing is adopted in the sealing of pump; It comprises rotating seat, friction pair, stationary seat, flange, axle sleeve and seize device; The seize device is directly embraced at mechanical seal axle and is put machine envelope axially locating, does not in addition have any locking device again, when pump bears bigger moment impact; The high pressure axial force often makes the seize device of machine envelope lose efficacy, thereby causes the mechanical seal fault.
4, existing double suction pump impeller port ring adopts straight control ring seal, and resistance is little, amount of leakage is big, sealing effect is poor, thereby causes the volumetric efficiency of pump on the low side.
5, as shown in Figure 7; The Rinsing unit of existing double suction pump mechanical seal is directly to weld or be screwed onto between the pumping chamber and pump cover machine envelope flushing chamber in the spiral case with cleaning hose; Wherein welding manner can't add restricting orifice, can't reduce the impact of washing solution to the machine envelope; Though the mode of being spirally connected can be added restricting orifice, adopt hard the connection because of the two ends of cleaning hose, cause dismantling maintenance difficult, inconvenient operation.
Summary of the invention
The technical problem that existing double suction pump suction chamber efficient is low, the hydraulic pressure strength test period long in order to solve, machine envelope seize device is prone to inefficacy, control ring seal weak effect the invention provides a kind of high pressure double suction pump.
Technical solution of the present invention is:
A kind of high pressure double suction pump comprises suction chamber, pump case, impeller, axle, is arranged on integrated mechanical sealing device, the impeller port ring seal arrangement between pump case and the axle, the Rinsing unit of mechanical seal, and its special way is:
Said suction chamber comprises suction port, shunting section and spiral section, and said shunting section comprises left runner, right runner and the spiral case wall between left runner and right runner, and said spiral case wall is provided with the branch overflow that extends to the suction port direction; The shunting section outer surface of said suction chamber is provided with at least one around the shunting section radially stiffening rib in one week;
Said integrated mechanical sealing device comprises the seize device, be arranged on the seize device outside is used to bear the nut that holds out against of mechanical seal device axial force;
Said impeller port ring seal arrangement comprises housing choma and impeller port ring; Said housing choma comprises straight seal section of housing choma and the housing choma labyrinth seal section that is positioned at different step surfaces; Said impeller port ring comprises straight seal section of the impeller port ring that is positioned at different step surfaces and impeller port ring labyrinth seal section; Straight seal section of said housing choma and impeller port ring labyrinth seal section cooperate the formation labyrinth seal, and the straight seal section of said housing choma labyrinth seal section and impeller port ring cooperates the formation labyrinth seal;
The Rinsing unit of said mechanical seal comprise two ends respectively with spiral case in the cleaning hose that is connected of pumping chamber and pump cover machine envelope flushing chamber sealing; Said cleaning hose comprises the fixedly cleaning hose at two ends and the detachable cleaning hose at middle part, said each fixedly all adopt a pair of flange to connect between cleaning hose and the detachable cleaning hose.
The left surface of above-mentioned minute overflow and the right flank of left runner link together and constitute the rounding off cambered surface; The right flank of said minute overflow and the left surface of right runner link together and constitute the rounding off cambered surface.
Above-mentioned minute overflow is streamlined structure.
The quantity of above-mentioned radially stiffening rib is three.
Above-mentioned shunting section outer surface is provided with at least two and extends to the shaft orientation reinforcing rib of spiral section from suction port, said shaft orientation reinforcing rib circumference uniform distribution, and the quantity of said shaft orientation reinforcing rib is two and is symmetrically distributed in the both sides of shunting section.
Be provided with restricting orifice in the middle of every pair of flange of above-mentioned Rinsing unit.
The above-mentioned nut that holds out against is for adding high nut.
Above-mentioned integrated mechanical sealing device also comprises being arranged on and holds out against the nut outside and be used to lock the lock nut that holds out against nut.
It is thin that the thickness ratio of above-mentioned lock nut holds out against nut.
Be provided with axial air gap between the end face of above-mentioned housing choma labyrinth seal section and the end face of impeller port ring labyrinth seal section, the straight seal section of said axial air gap and the straight seal section of housing choma and impeller port ring constitutes relief chamber.
Advantage of the present invention:
1, the present invention is provided with the branch overflow on the spiral case wall, and two inlets about suction port is divided into are equivalent to left and right sides runner is extended to suction port, have realized smoothly streaming, and have reduced flow resistance, have improved the efficient of suction chamber.
2, the present invention is provided with shaft orientation reinforcing rib and stiffening rib radially at the outer surface of suction chamber shunting section; Improved the voltage endurance capability and the intensity of suction chamber, when carrying out the hydraulic pressure strength test, the pump housing carries out bulge test according to the pumping chamber requirement of withstand voltage entirely; Shorten test period, reduced frock.
3, the present invention holds out against nut and a lock nut in one of the seize device arranged outside of integrated mechanical sealing device; Be used to bear the axial force of integrated mechanical sealing device; Improve the stationarity and the mechanical sealing performance of seize device, stopped the problem that under high-pressure work environment seize device flicks inefficacy.
4, the present invention is divided into straight seal section of housing choma and housing choma labyrinth seal section with the housing choma; Impeller port ring is divided into straight seal section of impeller port ring and impeller port ring labyrinth seal section; And the straight seal section of housing choma cooperates the formation labyrinth seal with impeller port ring labyrinth seal section and housing choma labyrinth seal section respectively with the straight seal section of impeller port ring on different step surfaces; Being equivalent to form two labyrinth seals and one turns round; Increase the flow resistance of liquid, improved the sealing effect between housing choma and the impeller port ring.
5, the present invention is provided with axial air gap between the end face of the end face of housing choma labyrinth seal section and impeller port ring labyrinth seal section; Make the space between axial air gap and the straight seal section of housing choma and the straight seal section of impeller port ring form relief chamber; Make the liquid that flows through labyrinth seal between straight seal section of housing choma and the impeller port ring labyrinth seal section produce divergence loss in the space herein; Reduce pressure; Thereby the more difficult labyrinth seal of passing through between housing choma labyrinth seal section and the straight seal section of impeller port ring reduces leakage rate, has reached better sealing effect.
6, the present invention does not need to reduce significantly the internal diameter of impeller port ring or increases the external diameter of housing choma; Just can significantly reduce the leakage rate of impeller port ring under the situation of just centrifugal pump mouth ring being done to change slightly; Improve the sealing effect of impeller, thereby improved the volumetric efficiency of centrifugal pump.
7, cleaning hose of the present invention comprises connect through flange two fixedly cleaning hose and detachable cleaning hoses, and this linkage structure is simple and reliable, and is beneficial to installations, dismounting and replacing, is convenient to safeguard the mechanical seal rinsing pipeline; And can change to the cleaning hose that stops up very easily, reduce maintenance cost.The present invention is the placement restricting orifice in the middle of two abutted flanges, can reduce the impact of high pressure washing liquid to the machine envelope, in the working life of prolonged mechanical seal arrangement, simultaneously, after restricting orifice damages, also can make things convenient for and replacing rapidly.
Description of drawings
Fig. 1 is the suction chamber external structure of high pressure double suction pump of the present invention and the schematic representation of stiffening rib;
Fig. 2 is the suction port of existing suction chamber and the structural representation of shunting section;
Fig. 3 is the suction port of suction chamber of the present invention and the structural representation of shunting section;
Fig. 4 is that the B of Fig. 3 is to view;
Fig. 5 is the structural representation of high pressure double suction pump of the present invention and flushing mechanism;
Fig. 6 is the structural representation of integrated mechanical sealing device of the present invention;
Fig. 7 is the connection schematic representation of cleaning hose in the existing double suction pump;
Fig. 8 is the structural representation of impeller port ring seal arrangement of the present invention:
Wherein: 1-suction chamber, 2-shunting section, 3-spiral section, 4-spiral case wall, the right runner of 5-, 6-left side runner; 7-divides overflow, the 8-shaft orientation reinforcing rib, and 9-is stiffening rib radially, and 21-is cleaning hose fixedly, the detachable cleaning hose of 22-, 23-flange; Pumping chamber in the 24-restricting orifice, 25-spiral case, 26-pump cover machine envelope flushing chamber, the 27-cap nut, the 28-cleaning hose, 31-holds out against nut; The 32-lock nut, 33-seize device, 34-integrated mechanical sealing device, 41-housing choma, 42-housing choma labyrinth seal section, the straight seal section of 43-housing choma; The 44-impeller port ring, 45-impeller port ring labyrinth seal section, the straight seal section of 46-impeller port ring, 47-relief chamber, 48-impeller, 49-housing.
Embodiment
Like Fig. 1, Fig. 3, shown in Figure 4; A kind of high pressure double suction pump; Comprise suction chamber 1, pump case, impeller, axle, be arranged on integrated mechanical sealing device 34, the impeller port ring seal arrangement between pump case and the axle, the Rinsing unit of mechanical seal; Suction chamber comprises suction port, shunting section 2 and spiral section 3, and shunting section 2 comprises left runner 6, right runner 5 and the spiral case wall 4 between left runner 6 and right runner 5, and the spiral case wall is provided with the branch overflow 7 that extends to the suction port direction; The left surface of branch overflow 7 and the right flank of left runner link together and constitute the rounding off cambered surface; The right flank of branch overflow 7 and the left surface of right runner link together and constitute the rounding off cambered surface.Dividing overflow 7 is streamlined structure.The shunting section outer surface of suction chamber is provided with at least one around the shunting section radially stiffening rib 9 in one week; Radially the quantity of stiffening rib 9 is three.The shunting section outer surface is provided with at least two and extends to shaft orientation reinforcing rib 8 circumference uniform distributions of spiral section from suction port, and the quantity of shaft orientation reinforcing rib 8 is two and is symmetrically distributed in the both sides of shunting section.
As shown in Figure 6, integrated mechanical sealing device comprises seize device 33, be arranged on that seize device 33 outsides are used to bear the mechanical seal device axial force hold out against nut 31; Hold out against nut 31 for adding high nut.Integrated mechanical sealing device also comprises being arranged on and holds out against the nut outside and be used to lock locking spiral shell 32 mothers that hold out against nut.It is thin that the thickness ratio of lock nut holds out against nut.
As shown in Figure 8; The impeller port ring seal arrangement comprises housing choma 41 and impeller port ring 44; Housing choma 41 comprises straight seal section 43 of the housing choma that is positioned at different step surfaces and housing choma labyrinth seal section 43; Impeller port ring 44 comprises straight seal section 46 of the impeller port ring that is positioned at different step surfaces and impeller port ring labyrinth seal section 45; The straight seal section 43 of housing choma cooperates the formation labyrinth seal with impeller port ring labyrinth seal section 45, and straight seal section 46 cooperations form labyrinth seal to housing choma labyrinth seal section 43 with impeller port ring; Be provided with axial air gap between the end face of housing choma labyrinth seal section 11 and the end face of impeller port ring labyrinth seal section, the straight seal section of axial air gap and the straight seal section of housing choma and impeller port ring constitutes relief chamber 47.
As shown in Figure 5; The Rinsing unit of mechanical seal comprise two ends respectively with spiral case in the cleaning hose that is connected of pumping chamber 25 and pump cover machine envelope flushing chamber 26 sealings; Cleaning hose comprises the fixedly cleaning hose at two ends and the detachable cleaning hose at middle part, and each fixedly all adopts a pair of flange 23 to connect between cleaning hose and the detachable cleaning hose.Be provided with restricting orifice 24 in the middle of every pair of flange of Rinsing unit.
Pump duty: 1500-2000m
3/ s;
Pumping head: 280m;
Pump efficiency: >=85%;
Pump pressure reaches 13Mpa after the series connection of pumps.
Claims (10)
1. high pressure double suction pump comprises suction chamber, pump case, impeller, axle, is arranged on the Rinsing unit of integrated mechanical sealing device, impeller port ring seal arrangement and mechanical seal between pump case and the axle, it is characterized in that:
Said suction chamber comprises suction port, shunting section and spiral section, and said shunting section comprises left runner, right runner and the spiral case wall between left runner and right runner, and said spiral case wall is provided with the branch overflow that extends to the suction port direction; The shunting section outer surface of said suction chamber is provided with at least one around the shunting section radially stiffening rib in one week;
Said integrated mechanical sealing device comprises the seize device, be arranged on the seize device outside is used to bear the nut that holds out against of said integrated mechanical sealing device axial force;
Said impeller port ring seal arrangement comprises housing choma and impeller port ring; Said housing choma comprises straight seal section of housing choma and the housing choma labyrinth seal section that is positioned at different step surfaces; Said impeller port ring comprises straight seal section of the impeller port ring that is positioned at different step surfaces and impeller port ring labyrinth seal section; Straight seal section of said housing choma and impeller port ring labyrinth seal section cooperate the formation labyrinth seal, and the straight seal section of said housing choma labyrinth seal section and impeller port ring cooperates the formation labyrinth seal;
The Rinsing unit of said mechanical seal comprise two ends respectively with spiral case in the cleaning hose that is connected of pumping chamber and pump cover machine envelope flushing chamber sealing; Said cleaning hose comprises the fixedly cleaning hose at two ends and the detachable cleaning hose at middle part, all adopts a pair of flange to connect between each said fixedly cleaning hose and the detachable cleaning hose.
2. high pressure double suction pump according to claim 1 is characterized in that: the left surface of said minute overflow and the right flank of left runner link together and constitute the rounding off cambered surface; The right flank of said minute overflow and the left surface of right runner link together and constitute the rounding off cambered surface.
3. high pressure double suction pump according to claim 2 is characterized in that: said minute overflow is streamlined structure.
4. high pressure double suction pump according to claim 1 is characterized in that: the quantity of said radially stiffening rib is three.
5. according to claim 1 or 4 described high pressure double suction pumps, it is characterized in that: said shunting section outer surface is provided with at least two and extends to the shaft orientation reinforcing rib of spiral section, said shaft orientation reinforcing rib circumference uniform distribution from suction port.
6. high pressure double suction pump according to claim 1 is characterized in that: be provided with restricting orifice in the middle of every pair of flange of said Rinsing unit.
7. high pressure double suction pump according to claim 1 is characterized in that: the said nut that holds out against is for adding high nut.
8. according to claim 1 or 7 described high pressure double suction pumps, it is characterized in that: said integrated mechanical sealing device also comprises being arranged on and holds out against the nut outside and be used to lock the lock nut that holds out against nut.
9. high pressure double suction pump according to claim 8 is characterized in that: it is thin that the thickness ratio of said lock nut holds out against nut.
10. high pressure double suction pump according to claim 1; It is characterized in that: be provided with axial air gap between the end face of said housing choma labyrinth seal section and the end face of impeller port ring labyrinth seal section, the straight seal section of said axial air gap and the straight seal section of housing choma and impeller port ring constitutes relief chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102002662A CN101892989B (en) | 2010-06-13 | 2010-06-13 | High-pressure double suction pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102002662A CN101892989B (en) | 2010-06-13 | 2010-06-13 | High-pressure double suction pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101892989A CN101892989A (en) | 2010-11-24 |
| CN101892989B true CN101892989B (en) | 2012-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102002662A Active CN101892989B (en) | 2010-06-13 | 2010-06-13 | High-pressure double suction pump |
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| CN (1) | CN101892989B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3156654A1 (en) * | 2015-10-14 | 2017-04-19 | Sulzer Management AG | Pump for conveying a highly viscous fluid |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2718278Y (en) * | 2004-08-04 | 2005-08-17 | 上海中航泵业制造有限公司 | Improved double-suction pump |
| CN2821239Y (en) * | 2005-06-16 | 2006-09-27 | 上海凯泉泵业（集团）有限公司 | Improved propeller of double suction centrifugal pump |
| JP4696774B2 (en) * | 2005-08-15 | 2011-06-08 | 株式会社日立プラントテクノロジー | Double suction centrifugal pump |
| CN200982296Y (en) * | 2006-12-18 | 2007-11-28 | 上海凯士比泵有限公司 | Single-stage single-suction centrifugal pump |
| KR20090005890U (en) * | 2007-12-11 | 2009-06-16 | 한국수자원공사 | Monitor for the State of Grease in Horizontal Double Suction Volute Pump Bearings |
| CN201751580U (en) * | 2010-06-13 | 2011-02-23 | 西安航天泵业有限公司 | High-pressure double-suction pump |
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2010
- 2010-06-13 CN CN2010102002662A patent/CN101892989B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3156654A1 (en) * | 2015-10-14 | 2017-04-19 | Sulzer Management AG | Pump for conveying a highly viscous fluid |
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| CN101892989A (en) | 2010-11-24 |
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| CB03 | Change of inventor or designer information |
Inventor after: Zeng Wei Inventor after: Hu Zhongbing Inventor after: Zhang Huimin Inventor after: Guo Zhenxue Inventor after: Zhang Hongkui Inventor after: Wang Kezhong Inventor after: Ma Yu Inventor after: Yang Wenxin Inventor after: Yang Yanguang Inventor after: Jin Jianshu Inventor before: Zeng Wei Inventor before: Yang Yanguang Inventor before: Jin Jianshu Inventor before: Hu Zhongbing Inventor before: Yang Yongping Inventor before: Qu Weide Inventor before: Ji Xing Inventor before: Fu Qiang |
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Free format text: CORRECT: INVENTOR; FROM: ZENG WEI YANG YANGUANG JIN JIANSHU HU ZHONGBING YANG YONGPING QU WEIDE JI XING FU QIANG TO: ZENG WEI ZHANG HUIMIN GUO ZHENXUE ZHANG HONGKUI WANG KEZHONG MA YU YANG WENXIN YANG YANGUANG JIN JIANSHU HU ZHONGBING |
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