CN103953549A - Centrifugal coal water slurry pump - Google Patents
Centrifugal coal water slurry pump Download PDFInfo
- Publication number
- CN103953549A CN103953549A CN201410134819.7A CN201410134819A CN103953549A CN 103953549 A CN103953549 A CN 103953549A CN 201410134819 A CN201410134819 A CN 201410134819A CN 103953549 A CN103953549 A CN 103953549A
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- impeller
- pump
- coal slurry
- bearing
- slurry pump
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Abstract
The invention provides a centrifugal coal water slurry pump, which is a vertical single-stage cantilever type centrifugal pump. The centrifugal coal water slurry pump comprises a pump base, a pump frame, an inlet elbow, a water outlet section, a bearing support, a bearing assembly, a shaft, a driving assembly and an impeller, the inlet elbow is connected with the pump base, the water outlet section is respectively connected with the pump base and the pump frame, the bearing support is connected with the pump frame, the bearing assembly is arranged on the bearing support, the shaft is fixed on the bearing support and the bearing assembly, the driving assembly is used for driving the shaft to rotate, the impeller is arranged on the front end of the shaft, the impeller, which is of a closed structure, comprises a front cover plate, main blades and a back cover plate, the center of the front cover plate is an impeller inlet, the main blades are arranged between the front cover plate and the back cover plate and integrated with the front cover plate and the back cover plate, the main blades are a plurality of long blades and a plurality of short blades, the long blades and the short blades are alternately arranged at intervals, so that impeller flow passages are formed, and at one side of the impeller flow passages, which is close to the impeller inlet, the long blades are longer than the short blades.
Description
Technical field
The present invention relates to centrifugal pump field, relate in particular to a kind of centrifugal water coal slurry pump.
Background technique
In prior art, in Coal Chemical Engineering Project gasification workshop section, overwhelming majority producer adopts coal water slurry process, adopted coal water slurry gasification technique, in coal water slurry gasification technological process, selecting of low-pressure water coal slurry pump, increasing producer selects centrifugal water coal slurry pump, facts have proved that it is the ideal product that substitutes diaphragm type and screw type low-pressure water coal slurry pump.
Because being subject to the restriction of the factors such as coal pulverizer specification, the flow of low-pressure water coal slurry pump is little, and lift is high, and the specific speed of pump is less, and the concentration of water coal slurry is higher in addition, and wearing and tearing, erosion are the key factors that centrifugal water coal slurry pump is considered.Reduce wear and will reduce the rotating speed of pump with erosion.Reduce rotating speed and will reach same lift, will increase impeller outer diameter.The disc friction losses of centrifugal pump is a key factor, the especially pump of the such low-specific-speed of centrifugal water coal slurry pump that affects its performance in addition, affects larger.Because disc friction losses is directly proportional to 5 powers of impeller outer diameter, so in order to improve the efficiency of centrifugal water coal slurry pump, one of the most direct method is exactly to reduce impeller diameter.But under the constant condition of rotating speed, in order to reach the lift of regulation, after impeller outer diameter reduces, need to select larger blade exit laying angle and enough numbers of blade.So just produced two problems: the one, the number of blade is more will cause inlet seriously to squeeze, and has increased the friction gross area, thereby causes pump performance to decline; The 2nd, because blade exit laying angle is larger, the diffusion of impeller overcurrent runner is serious, and then also will cause the decline of pump performance.
Water pump is not in most cases design point (best efficiency point) operation at pump, when the running of centrifugal pump has departed from design point, in spiral case, the axial symmetry of pressure distribution will be damaged, thereby produce, act on the radial force in impeller periphery, make axle be subject to alternating stress, produce directed amount of deflection.Radial force can be delivered to by impeller the supporting of axle and axle, thereby likely makes axle produce crooked and make the component such as sealing opening ring, shaft seal, filler and bearing produce friction and wear.For the axle rotating, radial force is an alternate load, can make axle destroy because of tired.When radial force is excessive, will makes axle produce excessive amount of deflection and cause impeller beat.If above-mentioned situation surpasses the interstice coverage between impeller and the pump housing, will affect the smooth running of pump and occur the stuck or wear phenomenon of impeller, make pump generation catastrophe failure or reduction pump performance, cause the accident in production.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of centrifugal water coal slurry pump, and it can be raised the efficiency, reduces pump inlet hydraulic loss, increase the service life.
In order to address the above problem, the invention provides a kind of centrifugal water coal slurry pump, for vertical single stage single-suction cantilever centrifugal pump, comprise pump seat, pump bracket, the import bend pipe being connected with described pump seat, the water exit end being connected with described pump seat and pump bracket respectively, the bearing bracket being connected with described pump bracket, be arranged on the bearing unit on described bearing bracket, be fixed on the axle on described bearing bracket and bearing unit, the impeller that is used for driving the driven unit of described axle rotation and is arranged on described axle front end, described impeller is closed type structure, described impeller comprises front shroud, primary blades and back shroud, the center of described front shroud is impeller inlet, described primary blades is arranged between front shroud and back shroud, and described primary blades and described front shroud and described back shroud are integrated, described primary blades comprises a plurality of linear leafs and a plurality of short blade, described linear leaf and described short blade interval alternative arrangement, to form impeller channel, a side at described impeller channel near impeller inlet, described linear leaf is longer than described short blade.
Further, described water exit end is double volute structure, with the radial force of centrifugal water coal slurry pump water exit end described in balance.
Further, on described front shroud, be provided with front back blades, on described back shroud, be provided with rear back blades, with the medium that stops impeller inlet, to impeller inlet and the Seal cage that is connected with described impeller, leak.
Further, described impeller adopts and is threaded with described axle, and makes to be screwed.
Further, described bearing unit comprises a measuring temperature of bearing element, and described measuring temperature of bearing element is for detection of the temperature of bearing.
Further, described bearing unit also comprises a cooling component, and described cooling component is for cooling bearing.
Further, described cooling component is fan.
Further, the bearing of described bearing unit adopts round nut and floor clip jointly fixing.
Further, also comprise the mechanical sealing assembly that is arranged on described axle, be arranged between described impeller and described mechanical sealing assembly and be arranged on resistance envelope stator and the resistance envelope impeller on described axle.
Further, also comprise the pump cover being connected with described pump seat, between described pump cover, water exit end and resistance envelope stator, adopt the sealing of O RunddichtringO.
The present invention's one advantage is, impeller adopts closed type structure, easily regulates pump cover gap, can not affect the efficiency of pump.The primary blades of impeller adopts linear leaf and short blade interval alternative arrangement to form composite blading, can increase impeller inlet area, improves the suction performance of pump, and minimizing pump inlet hydraulic loss prevents that water coal slurry from depositing in pump inlet.The Exit-edge primary blades number of impeller increases simultaneously, can reduce or prevent from exporting the separation of flow and the impact of backflow phenomenon on pump performance on the one hand, reduces the hydraulic loss of pump, reduces the abrasion of washing away of pump; Raise the efficiency, realize energy-conservation.
Another advantage of the present invention is, described water exit end is double volute structure, and the radial force of can cancelling out each other reaches the object of balance radial force.This is very helpful for the friction and wear that reduces the component such as pump seal choma, shaft seal, filler and bearing, and for the axle rotating, makes axle avoid destroying because of tired, thereby greatly increases the working life of pump.
Accompanying drawing explanation
Figure 1 shows that the structural representation of centrifugal water coal slurry pump of the present invention;
Figure 2 shows that the structural representation of impeller;
Figure 3 shows that the generalized section of impeller;
Figure 4 shows that the double volute structural representation of water exit end.
Reference character:
1, pump seat; 2, pump bracket;
3, import bend pipe; 4, water exit end;
5, axle; 6, bearing unit;
7, coupling assembly; 8, impeller;
9, pump cover; 10, mechanical sealing assembly;
11, resistance envelope stator; 12, resistance envelope impeller;
13, link; 14, bearing;
15, bearing bracket; 16, measuring temperature of bearing element;
17, cooling component; 18, motor;
19, the first spiral case; 20, the second spiral case;
201, front shroud; 202, back shroud;
203, impeller inlet; 204, impeller outlet;
205, linear leaf; 206, short blade;
207, the working surface of linear leaf; 208, front back blades;
209, rear back blades.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of centrifugal water coal slurry pump provided by the invention is elaborated.
Figure 1 shows that the structural representation of centrifugal water coal slurry pump of the present invention.In the present invention, described centrifugal water coal slurry pump is vertical single stage single-suction cantilever centrifugal pump.Referring to Fig. 1, centrifugal water coal slurry pump comprises pump seat 1, pump bracket 2, the bearing bracket 15 being connected with described pump bracket 2, be arranged on bearing unit 6 on described bearing bracket 15, be fixed on axle 5 and pump cover 9 on described bearing bracket 15 and bearing unit 6.
One import bend pipe 3 is connected with described pump seat 1, for the import of water coal slurry is provided.Described import bend pipe 3 is connected on a connection piece 13, and described link 13 is fixed on pump seat 1 together with described pump cover 9.One water exit end 4 is connected with described pump seat 1 and pump bracket 2 respectively, and described water exit end 4 is for providing the outlet of water coal slurry.
Described bearing unit 6 comprises bearing 14, measuring temperature of bearing element 16, cooling component 17.Described bearing 14, measuring temperature of bearing element 16, cooling component 17 are fixed on described bearing bracket 15.Described measuring temperature of bearing element 16 can remote monitoring axle real time temperature, carry out early warning and alarming.In this embodiment, described cooling component 17 adopts fan, adopts air-cooled mode cooling bearing 14, without using water quench, energy-conservation reliable.Described bearing 14 adopts round nut (not indicating in accompanying drawing) and the mode of floor clip (not indicating in accompanying drawing) combination to be fixed on bearing bracket 15, and this kind of means of fixation is safe and reliable.
Centrifugal water coal slurry pump of the present invention also comprises the driven unit for driving described axle 5 to rotate.Described driven unit can comprise the devices such as coupling assembly 7 and motor 18, with live axle 5, rotates.
Centrifugal water coal slurry pump of the present invention also comprises the impeller 8 that is arranged on described axle 5 front ends, and described impeller 8 is closed type structure.Adopt the impeller 8 of closed type structure easily to regulate pump cover gap, thereby can not affect the efficiency of water-coal slurry pump, can be in this embodiment, described impeller 8 adopts and is threaded with described axle 5, and make to be screwed, the transmitting torque that is threaded is large and safe and reliable.
Figure 2 shows that the structural representation of impeller 8, Figure 3 shows that the generalized section of impeller 8, for the structure of clearer demonstration impeller 8, in Fig. 2, removed a part of front shroud 201.Shown in Fig. 2 and Fig. 3, described impeller 8 is a kind of composite impeller, and it comprises front shroud 201, primary blades and back shroud 202.
Described front shroud 201 center is impeller inlet 203, and fed sheet of a media enters described impeller 8 from described impeller inlet 203.The edge of described front shroud 201 and back shroud 202 is impeller outlet 204, and fed sheet of a media is discharged from described impeller outlet 204.In this embodiment, described front shroud 201 and back shroud 202 are disc structure.
Described primary blades is arranged between front shroud 201 and back shroud 202, and described primary blades and described front shroud 201 and described back shroud 202 be integrated, three in one cast molding.Described primary blades comprises a plurality of linear leafs 205 and a plurality of short blade 206, described linear leaf 205 and described short blade 206 interval alternative arrangements, to form impeller channel, the side at described impeller channel near impeller inlet 203, described linear leaf 205 is longer than described short blade 206.
Impeller 8 can increase impeller inlet area, improves the suction performance of pump, reduces pump inlet hydraulic loss, prevents that water coal slurry from depositing in pump inlet; Impeller outlet place primary blades number increases simultaneously, can reduce or prevent from exporting the separation of flow and the impact of backflow phenomenon on pump performance on the one hand, reduces the hydraulic loss of pump, reduces the abrasion of washing away of pump; Raise the efficiency, realize energy-conservation.
Further, on described front shroud 201, be provided with front back blades 208, on described back shroud 202, be provided with rear back blades 209, the medium that described front back blades 208 and rear back blades 209 can stop impeller inlet 203 leaks to impeller inlet 203 and the Seal cage (not indicating in accompanying drawing) that is connected with described impeller, reduces the wearing and tearing at impeller port ring place, simultaneously can balancing axial thrust, described impeller port ring is term well known to those skilled in the art, be for example seal ring, wear ring, is not repeated herein.
The water exit end 4 of centrifugal water coal slurry pump of the present invention is double volute structure.Shown in Figure 4, described water exit end 4 comprises that the first spiral case 19 and the second spiral case 20, the first spiral cases 19 and the second spiral case 20 form double volute structures, and two symmetrical spiral cases radial force of can cancelling out each other reaches the object of balance radial force.This is very helpful for the friction and wear that reduces the component such as water-coal slurry pump sealing opening ring, mechanical sealing assembly, filler and bearing, and for the axle rotating, makes axle avoid destroying because of tired, thereby greatly increases the working life of pump.
Centrifugal water coal slurry pump of the present invention also comprises the mechanical sealing assembly 10 that is arranged on described axle 5, be arranged between described impeller 8 and described mechanical sealing assembly 10 and be arranged on resistance envelope stator 11 and the resistance envelope impeller 12 on described axle 5, can more effectively stop fed sheet of a media to external leakage.Described mechanical sealing assembly 10, resistance envelope stator 11, resistance envelope impeller 12 and bearing unit 6 are fixed on described pump bracket 2.
Pump cover 9 and resistance envelope stator 11 contacts with described water exit end 4 as abrasion-proof backing block, reach under regulation in limited time replaceable pump cover 9 and hinder and seal stator 11 in pump cover 9 and 11 wearing and tearing of resistance envelope stator.Between described pump cover 9, water exit end 4 and resistance envelope stator 11, adopt the sealing of O RunddichtringO, it is convenient that sealing is installed, and sealing effect is safe and reliable.
In the present invention, flow passage components comprise that import bend pipe 3, pump cover 9, impeller 8, water exit end 4, resistance envelope stator 11, resistance envelope impeller 12 etc. make by high wear resistant material.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a centrifugal water coal slurry pump, for vertical single stage single-suction cantilever centrifugal pump, comprise pump seat, pump bracket, the import bend pipe being connected with described pump seat, the water exit end being connected with described pump seat and pump bracket respectively, the bearing bracket being connected with described pump bracket, be arranged on the bearing unit on described bearing bracket, be fixed on the axle on described bearing bracket and bearing unit, the impeller that is used for driving the driven unit of described axle rotation and is arranged on described axle front end, it is characterized in that, described impeller is closed type structure, described impeller comprises front shroud, primary blades and back shroud, the center of described front shroud is impeller inlet, described primary blades is arranged between front shroud and back shroud, and described primary blades and described front shroud and described back shroud are integrated, described primary blades comprises a plurality of linear leafs and a plurality of short blade, described linear leaf and described short blade interval alternative arrangement, to form impeller channel, a side at described impeller channel near impeller inlet, described linear leaf is longer than described short blade.
2. centrifugal water coal slurry pump according to claim 1, is characterized in that, described water exit end is double volute structure, with the radial force of centrifugal water coal slurry pump water exit end described in balance.
3. centrifugal water coal slurry pump according to claim 1, it is characterized in that, on described front shroud, be provided with front back blades, on described back shroud, be provided with rear back blades, with the medium that stops impeller inlet, to impeller inlet and the Seal cage that is connected with described impeller, leak.
4. centrifugal water coal slurry pump according to claim 1, is characterized in that, described impeller adopts and is threaded with described axle, and makes to be screwed.
5. centrifugal water coal slurry pump according to claim 1, is characterized in that, described bearing unit comprises a measuring temperature of bearing element, and described measuring temperature of bearing element is for detection of the temperature of axle.
6. centrifugal water coal slurry pump according to claim 1, is characterized in that, described bearing unit also comprises a cooling component, and described cooling component is for cooling bearing.
7. centrifugal water coal slurry pump according to claim 6, is characterized in that, described cooling component is fan.
8. centrifugal water coal slurry pump according to claim 1, is characterized in that, the bearing of described bearing unit adopts round nut and floor clip jointly fixing.
9. centrifugal water coal slurry pump according to claim 1, is characterized in that, also comprise the mechanical sealing assembly that is arranged on described axle, be arranged between described impeller and described mechanical sealing assembly and be arranged on resistance envelope stator and the resistance envelope impeller on described axle.
10. centrifugal water coal slurry pump according to claim 9, is characterized in that, also comprises the pump cover being connected with described pump seat, between described pump cover, water exit end and resistance envelope stator, adopts the sealing of O RunddichtringO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134819.7A CN103953549A (en) | 2014-04-04 | 2014-04-04 | Centrifugal coal water slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134819.7A CN103953549A (en) | 2014-04-04 | 2014-04-04 | Centrifugal coal water slurry pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103953549A true CN103953549A (en) | 2014-07-30 |
Family
ID=51330868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410134819.7A Pending CN103953549A (en) | 2014-04-04 | 2014-04-04 | Centrifugal coal water slurry pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103953549A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389807A (en) * | 2014-11-21 | 2015-03-04 | 中国成达工程有限公司 | Shaft seal structure of centrifugal coal slurry pump |
| CN107542672A (en) * | 2016-06-28 | 2018-01-05 | 河南航天液压气动技术有限公司 | A kind of high rotating speed centrifugal pump of low discharge |
| CN108005913A (en) * | 2017-12-07 | 2018-05-08 | 株洲南方阀门股份有限公司 | A kind of turbine type high-pressure hydraulic pump |
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| JP2004278434A (en) * | 2003-03-17 | 2004-10-07 | Torishima Pump Mfg Co Ltd | Centrifugal pump |
| CN201110280Y (en) * | 2006-11-28 | 2008-09-03 | 上海通用泵机设备有限公司第一水泵厂 | Centrifugal coal liquid pump with heating mechanism |
| CN101586579A (en) * | 2009-04-23 | 2009-11-25 | 李新桥 | Sludge pump impeller with splitter vanes |
| CN202381389U (en) * | 2011-09-30 | 2012-08-15 | 杭州萧山美特轻工机械有限公司 | Chemical engineering process pump |
| CN202789659U (en) * | 2012-05-17 | 2013-03-13 | 南方泵业股份有限公司 | Large axially-split pump bearing body structure |
| CN103511322A (en) * | 2013-09-14 | 2014-01-15 | 江苏飞跃机泵制造有限公司 | Low-pressure centrifugal coal slurry pump |
| CN203796575U (en) * | 2014-04-04 | 2014-08-27 | 上海第一水泵厂有限公司 | Centrifugal coal water slurry pump |
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2014
- 2014-04-04 CN CN201410134819.7A patent/CN103953549A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004278434A (en) * | 2003-03-17 | 2004-10-07 | Torishima Pump Mfg Co Ltd | Centrifugal pump |
| CN201110280Y (en) * | 2006-11-28 | 2008-09-03 | 上海通用泵机设备有限公司第一水泵厂 | Centrifugal coal liquid pump with heating mechanism |
| CN101586579A (en) * | 2009-04-23 | 2009-11-25 | 李新桥 | Sludge pump impeller with splitter vanes |
| CN202381389U (en) * | 2011-09-30 | 2012-08-15 | 杭州萧山美特轻工机械有限公司 | Chemical engineering process pump |
| CN202789659U (en) * | 2012-05-17 | 2013-03-13 | 南方泵业股份有限公司 | Large axially-split pump bearing body structure |
| CN103511322A (en) * | 2013-09-14 | 2014-01-15 | 江苏飞跃机泵制造有限公司 | Low-pressure centrifugal coal slurry pump |
| CN203796575U (en) * | 2014-04-04 | 2014-08-27 | 上海第一水泵厂有限公司 | Centrifugal coal water slurry pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389807A (en) * | 2014-11-21 | 2015-03-04 | 中国成达工程有限公司 | Shaft seal structure of centrifugal coal slurry pump |
| CN107542672A (en) * | 2016-06-28 | 2018-01-05 | 河南航天液压气动技术有限公司 | A kind of high rotating speed centrifugal pump of low discharge |
| CN108005913A (en) * | 2017-12-07 | 2018-05-08 | 株洲南方阀门股份有限公司 | A kind of turbine type high-pressure hydraulic pump |
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Application publication date: 20140730 |