CN201057168Y - Anticorrosive impeller component of centrifugal pump - Google Patents
Anticorrosive impeller component of centrifugal pump Download PDFInfo
- Publication number
- CN201057168Y CN201057168Y CNU2007200401106U CN200720040110U CN201057168Y CN 201057168 Y CN201057168 Y CN 201057168Y CN U2007200401106 U CNU2007200401106 U CN U2007200401106U CN 200720040110 U CN200720040110 U CN 200720040110U CN 201057168 Y CN201057168 Y CN 201057168Y
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- CN
- China
- Prior art keywords
- impeller
- rotating shaft
- centrifugal pump
- spirally connected
- corrosion resisting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to reformation for impeller components of a corrosion-resistance centrifugal pump, which is characterized in that a metal part is embedded in the impeller and goes through the impeller in axial direction; the internal surface of the impeller is provided with thread; the end where a rotary axis is fixedly connected with the impeller has a ladder structure with internal part being thick and the outer par being thin; each ladder section is jointed with external thread; the distance traveled by nut on the thick section is larger than that of the compact distance traveled by nut on the thin section. The friction between the impeller and the rotary shaft is large, so axial displacement can not happen, and the reverse torsional distance imposed by water-hammer impact force can not make the compact nut loosen caused by rotation, thus ensuring the original sealing not to be loose and the corrosion medium inside the pump to be unable to enter into rotary shaft end and protecting the rotary shaft from being corroded, prolonging maintenance period and saving repairing cost.
Description
Technical field
Model utility is about the improvement to the corrosion resisting centrifugal pump impeller assembly.
Background technique
Corrosion resisting centrifugal pump, the macromolecular material that its impeller adopts corrosion resistant usually is the composite structure of plastics embedded metal member for example, impeller 2 is connected as Fig. 1 with rotating shaft 1, be processed to form by embedded metal part 2.1 and be used to wear axis hole and rotating shaft and be to be slidingly matched and be sheathed on outside the rotating shaft 1, between the two by stop pin 3 spacing anti-rotations, pass impeller at axle then and stretch out head and compress and make the impeller axial restraint, be connected with anticorrosion cap 6 at the axle head head again and carry out sealing corrosion with 5 pairs of axles of seal ring to piece together cap spiral shell nurse 4.This modular construction, in actual use, when pump was beaten high pressure, the impeller working surface became barotropic state, made impeller produce end thrust to motor drive direction, and then made impeller to the motor drive direction displacement; When pump is in big flow low-pressure working state, the working surface of impeller is in relative negative pressure state, can make impeller integral body produce pulling force to the Pump Suction Nozzle direction, and then make impeller to the displacement of axle head head.Impeller is changed by the displacement of opposite both direction power for a long time, finally can cause impeller assembly cap spiral shell nurse 4, anticorrosion cover 6 spiral shell nurses to become flexible, and causes sealing surface 5 gaps to become gross leak, and Korrosionsmedium enters rotating shaft, causes mashed axle.Secondly, this linkage structure prevents revolving pin owing to install additional, not only adorns, tears open equal inconvenience, and axial drawing impeller, the stressed yielding damage of impeller.
Another kind of impeller is connected and fixed mode such as Fig. 2 with rotating shaft, is processed with obstructed internal thread on the embedded metalwork 2.1 of anticorrosion impeller 2, and rotating shaft then is processed with the outside thread of joining screw-thread fit with it, and both pass through screw thread 2.2 affixed location.Though problem was become flexible in displacement before and after this kind Placement effectively limited impeller, but its deficiency is arranged also, under the effect of pump discharge medium refluence water hammer power, can give impeller with normal rotation adverse effect power, cause counter the turning round of impeller and that impeller and axle are spirally connected is loosening, impeller enters rotating shaft corrosion rotating shaft with the loosening aggressive medium that can cause equally of axle.
Therefore, existing anticorrosion centrifugal pump rotating shaft etching problem has become insoluble technology barrier of corrosion resisting centrifugal pump, and the very easy leakage of corrosion resistant centrifugal pump, mashed axle are damaged, and has shortened the Acceptable life of pump, has increased user cost.
The model utility content
The model utility purpose is to overcome the deficiency of above-mentioned prior art, the corrosion resisting centrifugal pump impeller assembly that provides a kind of rotating shaft to be difficult for being corroded.
The model utility purpose realizes, the main improvement is that impeller is spirally connected by axial penetration screw thread and rotating shaft, compress the location with piecing together cap spiral shell nurse more outward, and make and piece together cap thread pitch less than impeller and the rotating shaft screw thread pitch that is spirally connected, reach like this and both effectively limit impeller front and back displacement, simultaneously being spirally connected the assembly cap of pitch less than impeller can be with the impeller turn-back with commentaries on classics, thereby can guarantee that former sealing can not become flexible, and realizes the model utility purpose.Specifically, model utility corrosion resisting centrifugal pump impeller assembly, the macromolecule impeller that comprises rotating shaft and mount embedded metal part, it is characterized in that impeller embedded metal part axial penetration, the inner face screw thread that is spirally connected, thick outer thin hierarchic structure in the affixed impeller end of rotating shaft is, each ladder Duan Shangyou outside thread that is spirally connected, wherein thick section is spirally connected pitch greater than piecing together tight pitch on the thin segment with impeller.
Model utility is pieced together the assembly cap of tight impeller, can be provided with separately, also can be embedded in the preserving and sealing cap of termination.Wherein a kind of better mode is, the affixed impeller of rotating shaft end is carse, medium and small three ladder necking down structures by assemble sequence, the thick section impeller that is spirally connected, in the thick section assembly cap that is spirally connected, the thin segment preserving and sealing cap that is spirally connected.Wherein piece together tight thread pitch less than impeller and the rotating shaft pitch that is spirally connected as long as guarantee at least that impeller side is other.
Impeller is used to reach through hole, a kind of better is also to cooperate with the ladder rotating shaft, is slightly, carefully stepped, so the thin through hole in outer end, only need small dimension to piece together cap, can adopt small dimension to piece together cap, and can reduce sealing surface, the anti-leak performance improves, in addition, termination spiral shell nurse and preserving and sealing cap are little, and the Pump Suction Nozzle flow resistance is little, can keep pump efficiency not descend.
Model utility corrosion resisting centrifugal pump impeller assembly, owing to adopt impeller to be spirally connected with rotating shaft is penetrating, external application is tightened less than impeller and the rotating shaft pitch spiral assembly cap that is spirally connected.Impeller and rotating shaft are spirally connected, and have strengthened stiction between the two greatly, no matter in the high pressure working state, or the low-pressure working state, axial displacement all can not take place in impeller; And be subjected to the reverse torque that impact of water hammer power applies at impeller; owing to piece together tight spiral shell nurse pitch less than the impeller pitch that is spirally connected; thereby the impeller turn-back can not cause becoming flexible with changeing of the tight spiral shell nurse of assembly; thereby guarantee that original sealing can not become flexible; just leakage-gap can not appear; pump internal corrosion medium can not enter roller end, has just protected rotating shaft can not be corroded yet, and has effectively prolonged rotating shaft working life.And can prolong service cycle, save maintenance cost.Secondly, omit and prevent revolving pin, also make impeller adorn, tear open conveniently, can not damage impeller.
Below in conjunction with two representative embodiment, further specify model utility, embodiment only rises illustration of the present invention, can not be interpreted as concrete qualification and constraint to model utility.
Description of drawings
Fig. 1 is a kind of structural representation of prior art impeller assembly.
Fig. 2 is the another kind of structural representation of prior art impeller assembly.
Fig. 3 is a kind of preferred embodiment structural representation of model utility impeller assembly.
Embodiment
Embodiment 1: referring to Fig. 3, model utility corrosion resisting centrifugal pump impeller assembly, rotating shaft 1 connect impeller end make from inside to outside thick 1.1, in 1.2, three sections of thin 1 .3 are stepped, are processed with outside thread respectively on each ladder section, wherein stage casing 1.2 thread pitch are less than thick section 1.1 thread pitch.Ultra-high molecular weight polyethylene mold pressing impeller 2, metal insert 2.1 axially are processed with is used to reach through hole, and cooperates with rotating shaft and to be large and small shoulder hole, is processed with the internal thread with the rotating shaft screw-thread fit in the macropore.During assembling, at first impeller and rotating shaft 2.2 are screwed by being spirally connected, screw on respectively again and piece together tight spiral shell nurse 4 and preserving and sealing cap 6, compress seal ring 5.
Embodiment 2: as embodiment 1, piece together cap spiral shell nurse 4 in the middle of can omitting, make not end be spirally connected sealed cap 6 thread pitch less than rotating shaft and the impeller thread pitch that is spirally connected.
In addition, impeller is used to the axis hole and can also be adopted the equal diameter through hole.
Easy for describing, described anticorrosion impeller comprises centrifugal pump unshrouded impeller and double shrouded wheel etc.
Claims (4)
1. corrosion resisting centrifugal pump impeller assembly, the macromolecule impeller that comprises rotating shaft and mount embedded metal part, it is characterized in that impeller embedded metal part axial penetration, the inner face screw thread that is spirally connected, thick outer thin hierarchic structure in the affixed impeller end of rotating shaft is, each ladder Duan Shangyou outside thread that is spirally connected, wherein thick section is spirally connected pitch greater than piecing together tight pitch on the thin segment with impeller.
2. according to the described corrosion resisting centrifugal pump impeller assembly of claim 1, it is characterized in that it is large and small different shoulder holes that impeller axial hole and rotating shaft cooperate.
3. according to the described corrosion resisting centrifugal pump impeller assembly of claim 1, it is characterized in that the affixed impeller end of rotating shaft is carse, medium and small three ladder necking down structures.
4. according to the described corrosion resisting centrifugal pump impeller assembly of claim 3, it is characterized in that impeller outer is to piece together cap, piecing together cap is outward the preserving and sealing cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200401106U CN201057168Y (en) | 2007-06-21 | 2007-06-21 | Anticorrosive impeller component of centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200401106U CN201057168Y (en) | 2007-06-21 | 2007-06-21 | Anticorrosive impeller component of centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201057168Y true CN201057168Y (en) | 2008-05-07 |
Family
ID=39426010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200401106U Expired - Lifetime CN201057168Y (en) | 2007-06-21 | 2007-06-21 | Anticorrosive impeller component of centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201057168Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470536A (en) * | 2013-09-29 | 2013-12-25 | 中国北车集团大连机车研究所有限公司 | Connecting structure between centrifugal compressor impeller and spindle |
| CN104481920A (en) * | 2014-12-08 | 2015-04-01 | 无锡高卓流体设备有限公司 | Wear-corrosion-resistant impeller of submerged pump |
| CN106382251A (en) * | 2016-11-23 | 2017-02-08 | 广东威灵电机制造有限公司 | Centrifugal pump and impeller for centrifugal pump |
-
2007
- 2007-06-21 CN CNU2007200401106U patent/CN201057168Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470536A (en) * | 2013-09-29 | 2013-12-25 | 中国北车集团大连机车研究所有限公司 | Connecting structure between centrifugal compressor impeller and spindle |
| CN103470536B (en) * | 2013-09-29 | 2016-05-25 | 中国北车集团大连机车研究所有限公司 | The syndeton of centrifugal-flow compressor impeller and main shaft |
| CN104481920A (en) * | 2014-12-08 | 2015-04-01 | 无锡高卓流体设备有限公司 | Wear-corrosion-resistant impeller of submerged pump |
| CN106382251A (en) * | 2016-11-23 | 2017-02-08 | 广东威灵电机制造有限公司 | Centrifugal pump and impeller for centrifugal pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080507 |