CN101713411A - Semi-open impeller pump with sealing cover plate structure - Google Patents
Semi-open impeller pump with sealing cover plate structure Download PDFInfo
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- CN101713411A CN101713411A CN200810167158A CN200810167158A CN101713411A CN 101713411 A CN101713411 A CN 101713411A CN 200810167158 A CN200810167158 A CN 200810167158A CN 200810167158 A CN200810167158 A CN 200810167158A CN 101713411 A CN101713411 A CN 101713411A
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Abstract
The invention discloses a semi-open impeller pump with a sealing cover plate structure, which comprises a pump casing and a pump rear cover, an impeller and a pump shaft which are installed in the pump casing, and a motor which is arranged on the outer side of the pump casing. The impeller is installed on the pump shaft and is driven by the motor to rotate; and an inlet pipe and an outlet pipe are arranged on the pump casing. The impeller adopts a semi-open structure and comprises a vane, a wheel hub and a rear cover plate and is characterized in that the inlet pipe extends into the inner part of the pump casing from the outer part of the pump casing; the rear end of the inlet pipe is positioned at the front end of the vane of the impeller and shares one shaft with the pump shaft; and a ring-shaped sealing cover plate is installed at the rear end of the inlet pipe; the end surface of the sealing cover plate is parallel with the front end surface of the vane, and end cover sealing is formed between the both. The molded line of the vane adopts a variable camber curve, the camber of the curve is gradually reduced from the inlet to the outlet, and the camber is minimal at the outlet. The semi-open impeller pump has the advantages of simple manufacture process, convenient processing, low cost, stable structure, good passing ability of solid particle, smooth overflowing and high efficiency.
Description
Technical field
The present invention relates to a kind of water pump, especially a kind of by the semi-open impeller pump sheet metal it by punch and weld, the with closure plate structure.
Background technique
Along with the development of society, the centrifugal pump of half-opened impeller structure is that a kind of demand is big, the centrifugal pump product of wide application now, is widely used in thickness or solids-laden fluid conveying in the industrial departments such as food, beer, chemical industry.In the prior art, when this class centrifugal pump product uses, if liquid is thicker or liquid in when containing a spot of solid particle, liquid stops up in the flow process in impeller easily, passing ability is poor.
Application number is that 99111134.6 Chinese patent discloses a kind of " towards welding fabrication centrifugal pump and manufacture method thereof ", this centrifugal pump is by inlet flange, outlet(discharge) flange, bonnet, pump case and impeller constitute, pump case has between a pump case and the impeller and strikes out one along the liquid flow path direction, radially outward increases gradually, it is roughly semicircular that section is, full screw type volute chamber near 360 degree, and there is one to be roughly oval-shaped outlet stomidium, the curved neck of outlet is communicated with the outlet stomidium of pump case, the curved neck of the outlet of pump case is welded on the outlet stomidium of pump case, its longitudinal section is provided with labyrinth support ring for becoming the diameter ellipse in the pump case.This centrifugal pump is owing to adopt the enclosed impeller structure, and when containing solid particle when liquid in the thicker or liquid, liquid stops up in the flow process in impeller easily, and passing ability is poor, and utilization efficiency is lower.
The application number of claimant's previous application is that 200610033320.2 Chinese patent discloses a kind of " food pump molded by punching and welding ", this pump is made up of pump case, impeller and bonnet, impeller is positioned at the seal space the inside of pump case and bonnet composition, pump case is provided with inlet tube and outer pipe, the axial vane surface that described pump case links to each other with inlet tube is an oblique groove shape, the sagittal plane of pump case then is cylindrical, described pump case outer end is provided with the inlet tube support, described inlet tube support one end and the welding of the pump case outside, the other end and the welding of inlet tube outer surface.Though forming an end face seal structure between impeller and pump case, this food pump molded by punching and welding make its passing ability improve a little, but, this structure also exists following shortcoming: 1) to the pump shell structure complexity, manufacture process requirement improves, and has strengthened manufacture difficulty, cost and the manufacturing time of pump case; 2) because the end face that cooperates between impeller and the pump case is a plane of inclination, so just require the blade front-end face must be parallel with the front case of pump case, increased the production difficulty of impeller blade.In view of this special proposition the present invention.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, provide a kind of not only manufacturing process simple, easy to process, with low cost, structural stability, and the wing pump that passes through the it by punch and weld that performance is good, overcurrent is unobstructed, efficient is high of solid particle.
For solving the problems of the technologies described above, the present invention adopts the basic design of technological scheme to be: a kind of semi-open impeller pump of with closure plate structure, the motor that comprises pump case and be installed on pump postoperculum, impeller, the pump shaft in the pump case and be located at the pump case outside, pump case, pump postoperculum and impeller all adopt it by punch and weld, impeller is installed on the pump shaft, is rotated by motor driving; Described pump case is provided with inlet tube and outer pipe, described impeller is the semi-open type structure, form by blade, wheel hub and back shroud, it is characterized in that: described inlet tube extends to pump case inside by the pump case outside, the inlet tube rear end is positioned at the front end of impeller blade, and coaxial with pump shaft, and described inlet tube rear end is equipped with an annular seal cover plate, the end face that sealed cover is adjacent with blade is parallel with the blade front-end face, forms end face seal between the two.
Described impeller is evenly distributed on the back shroud of impeller by a plurality of blades and constitutes, and each blade by a cross section of a sheet metal drawing is
Structure,
One side of shape blade is fixedly welded on to form on the back shroud of impeller supports the base, another side protrudes in the back shroud face and forms working blade, the one side that working blade is identical with support base spring folding direction is opposite with the sense of rotation of blade, the one side opposite with support base spring folding direction is consistent with the sense of rotation of blade, this simultaneously is the working surface of blade, drives the liquid motion of being carried by it.Such structure not only can increase the strength and stiffness of blade, and liquid flowing in impeller is more unobstructed, and the efficient of pump is higher.
Its axial direction constant width of described working blade is constant.Not only manufacturing process is simple, cost is low, and is easy to constitute end face seal with sealed cover.
Owing to the liquid that contains solid particle or thickness that mostly is of semi-open impeller pump conveying, according to the movement characteristic of this class I liquid I in turbomachine, in the appearance obstruction of blade inlet, outlet port suction conditions appears.For adapting to this working condition, the present invention adopts the design proposal that strengthens blade import liquid overcurrent performance.Concrete structure is: (1) adopts high incidence, promptly strengthens the inlet blade angle degree, thereby increases the area of passage of blade inlet, reduces squeezing of blade, reduces the tortuosity of blade; (2) vane type line adopts the curve of variable curvature, and the curvature of curve progressively reduces then in blade inlet maximum, in outlet port curvature minimum.This Blade Design Method can reduce solid or viscous fluid in the obstruction of blade inlet, increase the inlet-duct area of blade, the overcurrent performance is better.
Perhaps, also can adopt the circular arc of multistage phase inscribe to constitute in radial direction by described blade, the vane curvature segmentation reduces, and the curvature from import to each section of Way out circular arc from large to small.When the circular arc that is three sections phase inscribes constitutes, profile ID D1, outer diameter D 2, radius is that the first section circular arc of r1 and the diameter at the place, second section circular arc point of contact that radius is r2 are DC1, second section circular arc of radius r 2 and radius are that the diameter at the place, the 3rd section circular arc point of contact of r3 is DC2, wherein: DC2＜2* (DC+D2)/3, DC1≤(DC2+D1)/2.
Described sealed cover is the cap-like structure of a hollow circular, comprise the body of the ring parallel and by the arc deflector of body outer circumferential edges to plane, body place one lateral bending song with the blade front-end face, this guide plate is to the bending of pump case front side, extend the edge greater than the outlet-pipe inlet scope, this arc deflector helps improving the outlet efficient of liquid.
The external diameter of described sealed cover body is more than or equal to impeller outer diameter, and less than the inlet tube external diameter, the round heart of sealed cover hollow is positioned on the inlet tube axis internal diameter more than or equal to the inlet tube internal diameter, and the gap a between sealed cover and the blade front end is not more than 1.5mm.
By a large amount of calculating and experimental studies have found that: have or not sealed cover, very big to parameter influences such as the flow of semi-open impeller pump, lift, efficient.There is sealed cover can improve flow more than 2 times, improves lift more than 30%; The front end and the gap between the sealed cover of blade are more little, and sealing effect is good more, but accuracy of manufacturing, assembling difficulty improve thereupon, and cost strengthens.Experimental result shows: when gap during less than 1.5mm, the performance parameter variations of water pump is little.Take into account manufacture cost and product performance, the front end of blade and the gap a between the sealed cover are controlled at 1.5mm and get final product with interior, require also can be chosen in the 1.0mm when higher.
Described inlet tube is fixed by pump case forward position and the inlet tube stent support that is fixed on the pump case.
The inlet tube support can be fixed in the pump case and also can be fixed on outside the pump case, the inlet tube support comprises cylindrical body portion that supports inlet tube and the supporting part that is fixed on the pump case, the circumferential outside sweep in one end of cylinder-shaped body extends to form supporting part, and supporting part is connected with the vertical wall welding or the bolt of pump case front side.
Motor is fixed on the pump case by a link press span.
After adopting technique scheme, the present invention compared with prior art has following beneficial effect.
Pump case provided by the invention at first because it adopts the manufacturing of punching press welding procedure, and it is simple and convenient to be shaped, and has both reduced cost of production, has overcome many shortcomings such as pollution, power consumption, consumptive material of casting technique again; Secondly, owing to adopt the half-opened impeller structure, the blade front end adopts end face seal structure, and it is compared with the structure of enclosed impeller, and the passing ability of fluid is better; Simultaneously, the curvature of the curve that vane type line adopts is in blade inlet maximum, the variable curvature curve that progressively reduces then, the curved surface that the multi-section circular arc that perhaps adopts the curvature segmentation to reduce constitutes, can guarantee when carrying liquid to flow thicker or containing solid particle, by this impeller the time, be not easy to stop up, so this centrifugal pump is not only applied widely, can be used for extracting various liquid; Sealed cover is made, assembling is simple, practical, low, the good sealing effect of cost, guarantee water pump reliably, operation efficiently.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Description of drawings
Fig. 1 is the semi-open impeller pump structural representation of with closure plate structure of the present invention;
Fig. 2 is a kind of mode of execution structural representation of impeller blade of the present invention;
Fig. 3 is the another kind of mode of execution structural representation of impeller blade of the present invention;
Fig. 4 is the structural representation of impeller of the present invention and sealed cover end face seal;
Fig. 5 is an inlet tube supporting structure schematic representation of the present invention;
Fig. 6 is that the C-C of inlet tube support among Fig. 5 is to view.
Embodiment
Extremely shown in Figure 6 as Fig. 1, the semi-open impeller pump of with closure plate structure of the present invention, form by pump case 1 and the motor 5 that is installed on pump postoperculum 2, impeller 3, the pump shaft 4 in the pump case and is located at pump case 1 outside, wherein, pump case 1, impeller 3 and pump postoperculum 2 parts all adopt punching press, welding fabrication, impeller 3 is positioned at the inside, space that pump case 1 and pump postoperculum 2 are tightly connected, and is installed on the pump shaft 4, by motor 5 rotary driving; Motor 5 is fixed on the pump case 1 by a link press span 6, described pump case 1 is provided with inlet tube 7 and outer pipe 8, described impeller 3 is the semi-open type structure, by blade 31, wheel hub 32 and back shroud 33 are formed, described inlet tube 7 extends to pump case inside by the pump case outside, inlet tube 7 rear ends are positioned at the front end of impeller blade 31, and it is coaxial with pump shaft 4, described inlet tube 7 rear ends are equipped with an annular seal cover plate 9, described sealed cover 9 is the cap-like structure of a hollow circular, comprise the body 91 of the ring parallel and by the arc deflector 92 (consult Fig. 4) of body outer circumferential edges to plane, body place one lateral bending song with the blade front-end face, this guide plate 92 is to the bending of pump case front side, extend the edge greater than outer pipe 8 inlet scopes (consulting Fig. 1), this arc deflector helps improving the outlet efficient of liquid, sealed cover body 91 is parallel with blade 31 front-end faces, forms end face seal between the two.
Pump case 1 of the present invention constitutes the pump housing with inlet tube 7, outer pipe 8 and inlet tube support 10, and pump case 1 is that a sheet metal integral body is stamped to form, and has guaranteed the cleaning in the pump case.Inlet tube 7 is by pump case 1 forward position and inlet tube support 10 support fixation that are fixed on the pump case, the inlet tube support can be fixed in the pump case and also can be fixed on outside the pump case, as shown in Figure 5 and Figure 6, inlet tube support 10 of the present invention comprises cylindrical body portion 11 that supports inlet tube and the supporting part 12 that is fixed on the pump case, the circumferential outside sweep in one end of cylindrical body portion 11 extends to form supporting part 12, and supporting part 12 is connected with vertical wall 13 welding or the bolt of pump case 1 front side.
Impeller 3 of the present invention is evenly distributed on the back shroud of impeller 33 by a plurality of blades 31 and constitutes, and each blade 31 by a cross section of a sheet metal drawing is
Structure,
One side of shape blade 31 is fixedly welded on to form on the back shroud of impeller supports base 312, and another side protrudes in the back shroud face and forms working blade 311 (consulting Fig. 4).The one side that working blade 311 is identical with supporting base 312 overbending directions is opposite with the sense of rotation of blade, the one side opposite with supporting base 312 overbending directions is consistent with the sense of rotation of blade, this simultaneously is the working surface of blade, drives the liquid motion of being carried by it.So not only can increase the strength and stiffness of blade, and liquid flowing in impeller is more unobstructed, the efficient of pump is higher.Described working blade 311 its axial direction width A are invariable, and not only manufacturing process is simple, cost is low, and are easy to constitute end face seal with sealed cover.
Owing to the liquid that contains solid particle or thickness that mostly is of semi-open impeller pump conveying, according to the movement characteristic of this class I liquid I in turbomachine, in the blade import suction conditions appears stopping up, occurring.For adapting to this working condition, the present invention adopts the design proposal that strengthens blade import liquid overcurrent performance.As shown in Figure 2, concrete structure is: (1) adopts high incidence, promptly strengthens the inlet blade angle degree, thereby increases blade import area of passage, reduces squeezing of blade, reduces the bending of blade; (2) vane type line adopts the curve of variable curvature, and the curvature of curve progressively reduces then in blade inlet maximum, in outlet port curvature minimum.This vane type line design method can reduce solid or viscous fluid in the obstruction of blade inlet, increase the inlet-duct area of blade, the overcurrent performance is better.
Perhaps, also can adopt the circular arc of multistage phase inscribe to constitute in radial direction by described blade, the vane curvature segmentation reduces, and the curvature from import to each section of Way out circular arc from large to small.As shown in Figure 3, when the circular arc that is three sections phase inscribes constitutes, profile ID D1, outer diameter D 2, radius is that the first section circular arc of r1 and the diameter at the place, second section circular arc point of contact that radius is r2 are DC1, second section circular arc of radius r 2 and radius are that the diameter at the place, the 3rd section circular arc point of contact of r3 is DC2, wherein: DC2＜2* (DC+D2)/3, DC1≤(DC2+D1)/2.The curvature of above-mentioned second section circular arc is less than the curvature of first section circular arc, and the curvature of the 3rd section circular arc is less than the curvature of second section circular arc.
Main improvement of the present invention is: as shown in Figure 4, weld an annular seal cover plate 9 in the inlet tube rearward end, make and form an end face seal between sealed cover 9 and the impeller blade 31, the outer diameter D 9 of described sealed cover 9 is more than or equal to impeller outer diameter D2, inner diameter d 9 more than or equal to inlet tube inner diameter d 7 less than inlet tube outer diameter D 7, the round heart O9 of sealed cover hollow is positioned on the inlet tube axis L, and the gap a between sealed cover body 91 and blade 31 front ends is not more than 1.5mm.
By a large amount of calculating and experimental studies have found that: have or not sealed cover, very big to parameter influences such as the flow of semi-open impeller pump, lift, efficient.There is sealed cover can improve flow more than 2 times, improves lift more than 30%; The front end and the gap between the sealed cover of blade are the smaller the better, but the gap is more little, and accuracy of manufacturing, assembling difficulty improve thereupon, and cost strengthens.Experimental result shows: as gap a during less than 1.5mm, the performance parameter variations of water pump is little.Take into account manufacture cost and product performance, the front end of blade and the gap a between the sealed cover are controlled at 1.5mm and get final product with interior, require also can be chosen in the 1.0mm when higher.
The semi-open impeller pump of the with closure plate structure that punch welding provided by the invention is shaped, at first because it adopts the manufacturing of punch welding technology, it is simple and convenient to be shaped, and has both reduced production cost, has overcome again the shortcomings such as pollution, power consumption, consumptive material of casting technique; Secondly, owing to adopt the half-opened impeller structure, the blade front end adopts end face seal structure, and it is compared with the structure of enclosed impeller, and the trafficability characteristic of fluid is better; Simultaneously, vane type line adopts the curve of variable curvature, curvature of a curve from import to Way out by reducing greatly, in exit curvature minimum, can guarantee when conveying liquid flows thicker or contains solid particle, by this impeller the time, also be not easy to stop up, so this centrifugal pump is not only applied widely, can be used for extracting various liquid; Seal cover board is made, assembling is simple, practical, low, the good sealing effect of cost, guarantee water pump reliably, efficiently operation.
Claims (8)
1. the semi-open impeller pump of a with closure plate structure comprises pump case and the motor that is installed on pump postoperculum, impeller, the pump shaft in the pump case and is located at the pump case outside, and impeller is installed on the pump shaft, is rotated by motor driving; Described pump case is provided with inlet tube and outer pipe, described impeller is the semi-open type structure, form by blade, wheel hub and back shroud, it is characterized in that: described inlet tube extends to pump case inside by the pump case outside, the inlet tube rear end is positioned at the front end of impeller blade, and coaxial with pump shaft, and described inlet tube rear end is equipped with a ring packing cover plate, the end face that sealed cover is adjacent with blade is parallel with the blade front-end face, forms end face seal between the two.
2. the semi-open impeller pump of a kind of with closure plate structure according to claim 1 is characterized in that: described impeller is evenly distributed on the back shroud of impeller by a plurality of blades and constitutes, and each blade by a cross section of a sheet metal drawing is
Structure,
One side of shape blade is fixed on to form on the back shroud of impeller supports the base, another side protrudes in the back shroud face and forms working blade, the one side that working blade is identical with support base spring folding direction is opposite with the sense of rotation of blade, the one side opposite with support base spring folding direction is consistent with the sense of rotation of blade, this simultaneously is the working surface of blade, drive the liquid motion of being carried by it, its axial direction constant width of described working blade is constant.
3. the semi-open impeller pump of a kind of with closure plate structure according to claim 2 is characterized in that: the molded lines of described blade adopts the curve of variable curvature, the curvature of curve from import to Way out by reducing greatly, in outlet port curvature minimum.
4. the semi-open impeller pump of a kind of with closure plate structure according to claim 2, it is characterized in that: described blade is the circular arc formation of multistage phase inscribe in radial direction, the vane curvature segmentation reduces, and the curvature from import to each section of Way out circular arc from large to small.
5. the semi-open impeller pump of a kind of with closure plate structure according to claim 4, it is characterized in that: its inside diameter D 1 of described impeller, outer diameter D 2, blade is that the circular arc of three sections phase inscribes constitutes, radius is that the first section circular arc of r1 and the diameter at the place, second section circular arc point of contact that radius is r2 are DC1, second section circular arc of radius r 2 and radius are that the diameter at the place, the 3rd section circular arc point of contact of r3 is DC2, wherein: DC2＜2* (DC+D2)/3, DC1≤(DC2+D1)/2.
6. the semi-open impeller pump of a kind of with closure plate structure according to claim 1, it is characterized in that: described sealed cover is the cap-like structure of a hollow circular, comprise the body of the ring parallel and by the arc deflector of body outer circumferential edges to plane, body place one lateral bending song with the blade front-end face, this guide plate extends the edge greater than the outlet-pipe inlet scope to the bending of pump case front side.
7. the semi-open impeller pump of a kind of with closure plate structure according to claim 6, it is characterized in that: the external diameter of described sealed cover body is more than or equal to impeller outer diameter, internal diameter more than or equal to the inlet tube internal diameter less than the inlet tube external diameter, the round heart of sealed cover hollow is positioned on the inlet tube axis, and the gap a between sealed cover and the blade front end is not more than 1.5mm.
8. the semi-open impeller pump of a kind of with closure plate structure according to claim 1 is characterized in that: described inlet tube is fixed by pump case forward position and the inlet tube stent support that is fixed on the pump case.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101671582A CN101713411B (en) | 2008-10-07 | 2008-10-07 | Semi-open impeller pump with sealing cover plate structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101671582A CN101713411B (en) | 2008-10-07 | 2008-10-07 | Semi-open impeller pump with sealing cover plate structure |
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| Publication Number | Publication Date |
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| CN101713411A true CN101713411A (en) | 2010-05-26 |
| CN101713411B CN101713411B (en) | 2011-11-16 |
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| CN2008101671582A Active CN101713411B (en) | 2008-10-07 | 2008-10-07 | Semi-open impeller pump with sealing cover plate structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047865A (en) * | 2013-03-14 | 2014-09-17 | 日本电产株式会社 | Pump |
| CN106958535A (en) * | 2017-05-19 | 2017-07-18 | 强胜精密机械(苏州)有限公司 | Double suction Turo pump |
| CN109899316A (en) * | 2017-12-08 | 2019-06-18 | 张颖 | Accelerate the centrifugal impeller of centrifugal pump |
| CN109915416A (en) * | 2019-04-28 | 2019-06-21 | 江苏大学镇江流体工程装备技术研究院 | A kind of punching is welded into type centrifugal pump body export structure and centrifugal pump |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1082627C (en) * | 1999-07-27 | 2002-04-10 | 阳江市新粤华不锈钢泵有限公司 | Centrifugal pump shaped by punching and welding and its manufacture method |
| CN2760292Y (en) * | 2004-02-26 | 2006-02-22 | 项新 | Centrifugal pump |
| CN100404874C (en) * | 2006-01-21 | 2008-07-23 | 阳江市新力工业有限公司 | Food pump molded by punching and welding |
| CN201265533Y (en) * | 2008-10-07 | 2009-07-01 | 阳江市新力工业有限公司 | Semi-opened impeller pump with sealing cover plate structure |
-
2008
- 2008-10-07 CN CN2008101671582A patent/CN101713411B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047865A (en) * | 2013-03-14 | 2014-09-17 | 日本电产株式会社 | Pump |
| CN106958535A (en) * | 2017-05-19 | 2017-07-18 | 强胜精密机械(苏州)有限公司 | Double suction Turo pump |
| CN109899316A (en) * | 2017-12-08 | 2019-06-18 | 张颖 | Accelerate the centrifugal impeller of centrifugal pump |
| CN109915416A (en) * | 2019-04-28 | 2019-06-21 | 江苏大学镇江流体工程装备技术研究院 | A kind of punching is welded into type centrifugal pump body export structure and centrifugal pump |
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| CN101713411B (en) | 2011-11-16 |
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Owner name: GUANGDONG YONGLI PUMP INDUSTRY CO., LTD. Free format text: FORMER OWNER: YANGJIANG XINLI INDUSTRIAL CO., LTD. Effective date: 20130424 |
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Effective date of registration: 20130424 Address after: Guangdong city of Yangjiang province Jiangcheng 529500 factory district north Venture North Second Industrial Zone Patentee after: Guangdong Winning Pumps Industrial Co., Ltd. Address before: 529500 second industrial zone, Chengbei North Road, Yangjiang, Guangdong Patentee before: Yangjiang Xinli Industrial Co., Ltd. |